RAZOR CARTRIDGE

Abstract

 According to one embodiment of the present disclosure, there is provided a razor cartridge comprising: a blade housing for accommodating at least one razor blade having a cutting edge in a longitudinal direction, the blade housing including a housing top surface toward which the cutting edge faces and a housing bottom surface opposite to the housing top surface; and a frame coupled with the blade housing, characterized in that the frame being coupled with the blade housing such that the blade housing is pivotable with respect to the frame about a first pivot axis penetrating the blade housing.

Description

[0001] This application claims the benefit of and priority to Korea Patent Application No. 10-2023-0168895, filed on November 29, 2023, and Korea Patent Application No. 10-2024-0171762, filed on November 27, 2024, the entire disclosures of which are hereby incorporated herein by reference in its entirety.

TECHNICAL FIELD

[0002] The present disclosure relates to a razor cartridge.

BACKGROUND

[0003] The contents described in this section simply provide background information on the present disclosure and do not constitute prior art.

[0004] A conventional razor, generally known as a wet razor, includes a razor cartridge and a razor handle.

[0005] The razor cartridge may be configured to pivot about a rotational axis (hereinafter, "parallel axis") parallel to an alignment direction of a razor blade between a neutral position and a pivot position in an assembled state. The pivoting about the parallel axis helps to achieve efficient shaving by smoothly contacting the razor cartridge with a user's skin.

[0006] In addition, recently, in order to smoothly contact the user's skin, a razor having a pivot function about a rotational axis (hereinafter, "vertical axis") perpendicular to the parallel axis in addition to the pivot function about the parallel axis has been developed.

[0007] Meanwhile, since most of the vertical axis passes through the razor handle, a distance between the vertical axis and the razor cartridge is far. Therefore, the pivoting about the vertical axis may be somewhat less responsive to a user's stroke. In this case, skin adhesion may be weakened, and excessive stimulation may be applied to the user's skin.

[0008] Meanwhile, the razor cartridge includes a lubricating band for applying a lubricant. The lubricant included in the lubricating band may be applied to the user's skin before or after shaving to make the cartridge stroke smoother or reduce irritation to the skin during shaving.

[0009] Generally, the lubricating band is placed at the rear of the razor blade in the shaving direction. In this case, the lubricating band may have a limited area, and it is difficult to apply lubricants with various characteristics. Therefore, in order to make the stroke smoother and reduce skin irritation during shaving, the development of a razor cartridge that can apply more lubricants and lubricants with various characteristics may be required.

SUMMARY

[0010] Therefore, the present disclosure is intended to solve these problems, and provides a razor cartridge that is capable of pivoting within the razor cartridge so that the pivoting movement is highly responsive and the contact with a user's skin is improved, and applying various lubricants over a wider range.

[0011] According to one embodiment of the present disclosure, the present disclosure provides a razor cartridge comprising: a blade housing for accommodating at least one razor blade having a cutting edge in a longitudinal direction, the blade housing including a housing top surface toward which the cutting edge faces and a housing bottom surface opposite to the housing top surface; and a frame coupled with the blade housing, characterized in that the frame being coupled with the blade housing such that the blade housing is pivotable with respect to the frame about a first pivot axis penetrating the blade housing.

[0012] As described above, according to the present embodiment, there is an effect of enhancing responsiveness of the pivoting, improving the contact with a user's skin, and applying various lubricants over a wider range.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 

Fig. 1A is a combined perspective view of a razor cartridge according to one embodiment of the present disclosure.

Fig. 1B is a view when an example of a razor cartridge according to one embodiment of the present disclosure pivoting about a first pivot axis is viewed from above.

Figs. 2A to 2C are schematic diagrams illustrating an example of a razor cartridge according to one embodiment of the present disclosure pivoting about a second pivot axis.

Fig. 3 is an exploded view of a razor cartridge according to one embodiment including a torsion spring.

Fig. 4 is a view illustrating an example of a razor cartridge according to one embodiment including a torsion spring pivoting about the first pivot axis from below.

Fig. 5 is an exploded view of a razor cartridge according to one embodiment including a first plate spring.

Fig. 6 is a view in which an example of a razor cartridge according to one embodiment including a first plate spring pivoting about the first pivot axis is taken along line A-A' of Fig. 1A and viewed from below.

Fig. 7 is an exploded view of a razor cartridge according to one embodiment including a second plate spring.

Fig. 8 is a view in which an example of the razor cartridge according to one embodiment including the second plate spring pivoting about the first pivot axis is taken along line A-A' of Fig. 1A and viewed from below.

Fig. 9 is an exploded view of a razor cartridge according to one embodiment including a pair of first elastic portions.

Fig. 10 is a view in which an example of the razor cartridge according to one embodiment including a pair of first elastic portions pivoting about the first pivot axis is taken along line A-A' of Fig. 1A and viewed from below.

Fig. 11 is an exploded view of a razor cartridge according to one embodiment including a pair of second elastic portions.

Fig. 12 is a view in which an example of the razor cartridge according to one embodiment including the pair of second elastic portions pivoting about the first pivot axis is taken along line A-A' of Fig. 1A, and viewed from below.

Fig. 13 is an exploded view of a razor cartridge according to one embodiment including a pair of third elastic portions.

Fig. 14 is a view in which an example of the razor cartridge according to one embodiment including the pair of third elastic portions pivoting about the first pivot axis is taken along line A-A' of Fig. 1A and viewed from below.

Fig. 15 is an exploded view of a razor cartridge according to one embodiment including a pair of fourth elastic portions.

Fig. 16 is a view in which an example of the razor cartridge according to one embodiment including the pair of fourth elastic portions pivoting about the first pivot axis is viewed from below.

Fig. 17 is a view in which an example of the razor cartridge according to one embodiment including the pair of fourth elastic portions being translated in a direction parallel to a shaving direction is viewed from below.

Fig. 18 is a combined perspective view of a razor cartridge according to another embodiment of the present disclosure.

Fig. 19 is a view in which an example of a razor cartridge according to another embodiment of the present disclosure pivoting about the first pivot axis is viewed from above.

DETAILED DESCRIPTION

[0014] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It is to be noted that in giving reference numerals to components of each of the accompanying drawings, the same components will be denoted by the same reference numerals even though they are illustrated in different drawings. Further, in describing exemplary embodiments of the present invention, well-known functions or constructions will not be described in detail since they may unnecessarily obscure the understanding of the present invention.

[0015] Terms 'first', 'second', i), ii), a), b), and the like, will be used in describing components according to embodiments of the present disclosure. These terms are only for distinguishing the components from other components, and the nature, sequence, order, or the like of the components are not limited by the terms. Throughout the present specification, unless explicitly described to the contrary, "including" or "comprising" any components will be understood to imply the inclusion of other elements rather than the exclusion of any other elements.

[0016] Fig. 1A is a combined perspective view of a razor cartridge 10 according to one embodiment of the present disclosure.

[0017] Fig. 1B a view illustrating an example in which the razor cartridge 10 according to one embodiment of the present disclosure pivots about a first pivot axis.

[0018] Referring to Figs. 1A and 1B, the razor cartridge 10 according to one embodiment of the present disclosure may include a blade housing 100 and a frame 200.

[0019] The blade housing 100 accommodates at least one razor blade 130 having a cutting edge in a longitudinal direction. Here, the longitudinal direction refers to a longitudinal direction of the razor cartridge 10. For example, the longitudinal direction is a direction parallel to an X-axis in Fig. 1A.

[0020] Meanwhile, the longitudinal direction is based on the case when the blade housing 100 is at a first pivot rest position to be described later. Therefore, even when the blade housing 100 is pivoted, the longitudinal direction is defined assuming that the blade housing 100 is at the first pivot rest position to be described later.

[0021] The blade housing 100 may include a housing top surface 102 toward which the cutting edge faces and a housing bottom surface 104 (refer to Fig. 3) opposite to the housing top surface 102.

[0022] The frame 200 is coupled with the blade housing 100. For example, the blade housing 100 and the frame 200 may be coupled with each other in a height direction. Here, the height direction is a direction parallel to the direction from the housing top surface 102 toward the housing bottom surface 104, for example, a direction parallel to a Z axis in Fig. 1A.

[0023] However, the coupling direction of the blade housing 100 and the frame 200 is not necessarily limited to the height direction. For example, the blade housing 100 may be coupled with the frame 200 in the shaving direction or in the direction opposite to the shaving direction. Here, the shaving direction refers to a direction in which the razor cartridge 10 is stroked during shaving. For example, the shaving direction is a negative Y-axis direction in Fig. 1A.

[0024] Meanwhile, the shaving direction is based on when the blade housing 100 is at the first pivot rest position to be described later. Therefore, even when the blade housing 100 is pivoted, the shaving direction is defined assuming that the blade housing 100 is at the first pivot rest position to be described later.

[0025] The frame 200 may be coupled with the blade housing 100 so that the blade housing 100 can pivot with respect to the frame 200 about a first pivot axis ax1. Here, the first pivot axis ax1 is a virtual axis penetrating the blade housing 100 and may be parallel to the height direction.

[0026] The first pivot rest position refers to a state in which the blade housing 100 does not pivot about the first pivot axis ax1 with respect to the frame 200.

[0027] Referring to Fig. 1B, when a pivot angle θ of the blade housing 100 at the first pivot rest position is 0°, the maximum pivot angle θ of the blade housing 100 may be between 1° to 20°, and preferably may be between 10° to 15°. The range of the maximum pivot angle of the blade housing 100 exemplified in Fig. 1B may also be applied to the embodiments of the present disclosure described below.

[0028] In the razor cartridge 10 according to one embodiment of the present disclosure, the blade housing 100 within the razor cartridge 10 can pivot about the first pivot axis ax1 penetrating the blade housing 100. For example, even when the razor cartridge 10 is not connected to a razor handle 30 (refer to Fig. 2A) or is not connected to a connector 50 (refer to Fig. 2A) coupled with one side of the razor handle, the pivoting about the first pivot axis ax1 within the razor cartridge 10 may be possible.

[0029] In the razor cartridge 10 according to one embodiment of the present disclosure, by positioning the first pivot axis ax1 within the razor cartridge 10, the pivoting according to a user's stroke may be immediately performed within the razor cartridge 10. Through this, the contact with the user's skin can be improved, and since a rapid change of direction according to the skin condition during shaving is possible, irritation applied to the skin can be reduced.

[0030] Meanwhile, the razor cartridge 10 according to one embodiment of the present disclosure may further include a first restoring force providing units 300, 500, 700, 900, 1100, 1300 and 1500. The first restoring force providing units 300, 500, 700, 900, 1100, 1300 and 1500 are configured to provide a first pivot restoring force to the blade housing 100 to return the blade housing 100 to the first pivot rest position in a state where the blade housing 100 is pivoted about the first pivot axis ax1 from the first pivot rest position. Detailed descriptions of how the first restoring force providing units 300, 500, 700, 900, 1100, 1300 and 1500 provide the first pivot restoring force will be described later.

[0031] The first pivot axis ax1 may penetrate the blade housing 100 in a direction parallel to the height direction. However, the direction of the first pivot axis ax1 is not limited thereto, and the first pivot axis ax1 may not be parallel to the height direction.

[0032] In order to provide a more stable pivoting, the first pivot axis ax1 may be configured to penetrate the central region of the blade housing 100 in the longitudinal direction. For example, as illustrated in Fig. 1A, the first pivot axis ax1 may be configured to penetrate the region where at least one razor blade 130 is positioned and the central region of the blade housing 100 in the longitudinal direction, but is not necessarily limited thereto.

[0033] Meanwhile, the blade housing 100 may be configured to be translated in a direction parallel to the shaving direction with respect to the frame 200, for example, in a direction parallel to the Y-axis direction of Fig. 1A and Fig. 1B. In this case, the first pivot axis ax1 may move in a direction parallel to the shaving direction according to the translation of the blade housing 100.

[0034] The translation rest position refers to a state in which the blade housing 100 is not translated with respect to the frame 200. The state of the first pivot position may be the translation rest position, but is not necessarily limited thereto.

[0035] For example, when the blade housing 100 is not pivoted with respect to the first pivot axis ax1 in a state where the blade housing is translated, the blade housing 100 is at the first neutral position but is not at the translation rest position. Similarly, when the blade housing 100 is not translated in a state where the blade housing is pivoted about the first pivot axis ax1, the blade housing 100 is at the translation rest position, but is not at the first pivot rest position.

[0036] When a movement distance of the blade housing 100 in the direction parallel to the shaving direction with respect to the frame 200 at the translation rest position is 0 mm, the blade housing 100 can be translated within 10 mm in the direction opposite to the shaving direction, preferably within 6 mm, and more preferably within 3 mm.

[0037] When the blade housing 100 is translated in the direction parallel to the shaving direction with respect to the frame 200, it is possible to provide resistance even when a sudden change of direction occurs during shaving or excessive force is applied, thereby enabling safe shaving, and when the skin surface is not uniform due to a skin condition or unevenness, a translation speed of the blade housing 100 can be reduced, thereby minimizing wounds or cuts on the skin.

[0038] In addition, in order to provide a translation restoring force to the blade housing 100 to return the blade housing 100 to the translation rest position in a state where the blade housing 100 is translated parallel to the shaving direction from the translation rest position, the razor cartridge 10 may further include a separate elastic member such as rubber, a spring, or a plastic tension bar, but is not necessarily limited thereto. For example, it is also possible for the first restoring force providing unit to be configured to provide not only the first pivot restoring force but also the translation restoring force. Detailed descriptions thereof will be given later.

[0039] Through the translation of the blade housing 100 in a direction parallel to the shaving direction, the buffering action of the razor cartridge 10 can be enabled, and accordingly, a smooth shaving sensation can be provided.

[0040] The blade housing 100 includes all or some of a guard 120, a first lubricating band 160, a pair of clips 140, a second lubricating band 110, and a pair of side openings 150.

[0041] The guard 120 may be positioned in front of at least one razor blade 130 in the shaving direction. The guard 120 may stretch the skin before the body hair is cut by the at least one razor blade 130 during the shaving process. Accordingly, the user's body hair may be raised in a direction perpendicular to the user's skin surface by the guard 120, thereby making it easier to cut the body hair by the at least one razor blade 130.

[0042] Here, the first pivot axis ax1 may be positioned in the rear of the guard 120 in the shaving direction. Since the guard 120 is a point that supports the user's skin during shaving, a force is applied to the point, and when the first pivot axis ax1 is disposed at the rear of the guard 120, the action moment may increase. When the action moment increases, the responsiveness of the pivoting about the first pivot axis ax1 may be further improved.

[0043] The force required for the pivoting about the first pivot axis ax1 may be 10 gf to 70 gf, and preferably 30 gf to 50 gf.

[0044] The first lubricating band 160 is disposed at the rear of at least one razor blade 130 in the shaving direction. The first lubricating band 160 may be configured to apply a lubricant to the user's skin in order to provide softness to the user.

[0045] A pair of clips 140 may maintain at least one razor blade 130 on the blade housing 100. Thereby, at least one razor blade 130 may not be separated from the blade housing 100.

[0046] In Figs. 1A and 1B, one side of each of the pair of clips 140 is configured to penetrate the blade housing 100 and the other side is configured to surround a rear surface of the blade housing 100, but it is not necessarily limited to this configuration as long as the razor blade 130 can be maintained by the blade housing 100.

[0047] The second lubricating band 110 may be disposed in front of the guard 120 in the shaving direction. The second lubricating band 110 may be configured to apply a lubricant to the user's skin in order to provide a smooth cartridge stroke to the user. However, it is also possible for the second lubricating band 110 to be disposed between the rear of the guard 120 and at least one razor blade 130.

[0048] Here, the lubricant included in the first lubricating band 160 and the lubricant included in the second lubricating band 110 may be the same as each other, but is not necessarily limited thereto, and may be different from each other.

[0049] For example, the second lubricating band 110 may come into contact with the user's skin before the user's body hair is raised and/or cut, and thus, may include a component of a shaving aid, and the first lubricating band 160 may come into contact with the user's skin after the user's body hair is raised and cut, and thus, may include a component for relieving skin irritation of the user.

[0050] A pair of side openings 150 are formed on both sides of the blade housing 100 in the longitudinal direction so that cleaning water can pass through the blade housing 100 in a region adjacent to both side surfaces of at least one razor blade 130 in the longitudinal direction.

[0051] For example, the cleaning water flowing in from the side opening 150 on one side of the blade housing 100 in the longitudinal direction may pass through the side opening 150 on the other side of the longitudinal direction through at least one razor blade 130.

[0052] In particular, when the pivoting is performed as illustrated in Fig. 1B, at least a portion of one of the pair of side openings 150 may be exposed to the outside, thereby effectively discharging shaving residues existing in the razor cartridge 10 after shaving.

[0053] Meanwhile, the frame 200 includes both or one of at least one outer portion 220 and at least one third lubricating band 210.

[0054] At least one outer portion 220 has a height extending in the direction parallel to the first pivot axis ax1 and is configured to surround at least a portion of the outer portion of the blade housing 100 in a state where the blade housing 100 and the frame 200 are coupled with each other.

[0055] As illustrated in Fig. 1A and Fig. 1B, at least one outer portion 220 may include a pair of longitudinal side portions 225 spaced apart from each other in the longitudinal direction so as to surround at least a portion of both sides of the blade housing 100 in the longitudinal direction, but is not necessarily limited thereto, and this will be described later.

[0056] It is preferable that at least one outer portion 220 is formed to correspond to the outer shape of the blade housing 100, thereby guiding the pivoting of the blade housing 100 and protecting the blade housing 100 from external impact.

[0057] At least one third lubricating band 210 is formed on the top surface of at least one outer portion 220 in the height direction. At least one third lubricating band 210 may be configured to apply the lubricant to the user's skin in order to provide softness to the user.

[0058] Here, the lubricant included in the third lubricating band 210 may be the same as the lubricant included in the first lubricating band 160 and/or the second lubricating band 110, but is not necessarily limited thereto, and may be different from each other.

[0059] In addition, when at least one outer portion 220 includes a pair of longitudinal side portions 225, the frame 200 may include the pair of third lubricating bands 210 formed on the top surface of each of the pair of longitudinal portions 225. In this case, the lubricants included the pair of third lubricating bands 210 may be the same as each other, but is not necessarily limited thereto, and may be different from each other.

[0060] For example, assuming that the stroke direction is constant during the shaving, the lubricant included in the third lubricating band 210 on one side of the longitudinal direction may include a component of a shaving aid, and the lubricant included in the third lubricating band 210 on the other side of the longitudinal direction may include a component for relieving skin irritation of the user.

[0061] However, the third lubricating band 210 does not necessarily have to be formed as a pair, and may be formed in only one of the pair of the longitudinal side portions 225, or may be formed to be divided in a plurality of region in each longitudinal side portion.

[0062] Meanwhile, at least a portion of the housing top surface 102 and at least a portion of the frame 200 adjacent to the housing top surface 102 may form a skin contact surface that comes into contact with the user's skin during shaving.

[0063] For example, the frame 200 may include a frame top surface 202 adjacent to the housing top surface 102 and a frame bottom surface 204 (refer to Fig. 4) opposite to the frame top surface 202, and at least a portion of the housing top surface 102 and at least a portion of the frame top surface 202 may form the skin contact surface.

[0064] By forming the skin contact surface not only on the blade housing 100 but also on the frame 200, the area in contact with the user's skin within the razor cartridge 10 can be increased, and thus, it is possible to provide a more improved sense of comfort to the user.

[0065] In addition, the first to third lubricating bands 160, 110, and 210 may be disposed on the skin contact surface, thereby allowing the application of the lubricant contained in each of the first to third lubricating bands 160, 110, and 210 to be performed in a wider range and in a variety of ways.

[0066] Figs. 2A to 2C are schematic diagrams illustrating an example of a razor cartridge pivoting about a second pivot axis (second axis, ax2) according to one embodiment of the present disclosure.

[0067] Referring to Figs. 2A to 2C, the frame 200 may be configured to pivot about the second pivot axis ax2 parallel to the longitudinal direction with respect to a razor handle 30 by being connected to a connector 50 coupled with one side of the razor handle 30.

[0068] However, it is not necessarily limited thereto, and the frame 200 may be configured to pivot about the razor handle 30 about the second pivot axis ax2 parallel to the longitudinal direction by being directly connected to the razor handle 30.

[0069] Accordingly, the razor cartridge 10 according to one embodiment of the present disclosure may be configured to pivot not only about the first pivot axis ax1, that is, the vertical axis, but also about the second pivot axis ax2, that is, the horizontal axis.

[0070] In this case, a second restoring force providing unit 40 may be provided in one side of a connector 50 and/or the razor handle 30. For example, in Figs. 2A to 2C, the second restoring force providing unit 40 is illustrated as being provided in the connector 50, but is not necessarily limited thereto and may be provided on one side of the razor handle 30.

[0071] The second restoring force providing unit 40 may provide a second pivot restoring force to return the razor cartridge 10 to the second pivot rest position, for example, in a state where the frame 200 of the razor cartridge 10 pivots about the second pivot axis ax2 from the second pivot rest position.

[0072] More specifically, the second restoring force providing unit 40 may provide a second pivot restoring force to the razor cartridge 10 by elastically supporting an elastic force support portion 250 (refer to Fig. 4) described below.

[0073] In Figs. 2A to 2C, the second restoring force providing unit 40 is configured to move forward and backward as the razor cartridge 10 pivots about the second pivot axis ax2, thereby providing the second pivot restoring force. However, the present invention is not necessarily limited to this method of providing restoring force, as long as the razor cartridge 10 can be returned to the second pivot rest position.

[0074] Below, detailed descriptions of the coupling and pivoting of the blade housing 100 and frame 200 are provided through various examples.

[0075] Fig. 3 is an exploded view of a razor cartridge 10 according to one embodiment including a torsion spring 300.

[0076] Fig. 4 is a view illustrating an example of the razor cartridge 10 according to one embodiment including a torsion spring 300 pivoting movement about the first pivot axis ax1 from below.

[0077] Referring to Figs. 3 and 4, the torsion spring 300 is illustrated as an example of the first restoring force providing unit. The torsion spring 300 may be formed integrally with the blade housing 100 or the frame 200 such that a first pivot axis ax1 passes through the center of the torsion spring. The torsion spring 300 may be deformed due to the pivoting movement of the blade housing 100 and the frame 200 with respect to each other.

[0078] For example, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, the torsion spring 300 may also twist in the direction of the pivoting, and the first pivot restoring force may be generated according to the degree of twisting.

[0079] In addition, the torsion spring 300 may provide a translation restoring force to the blade housing 100 even when the blade housing 100 is translated in the direction parallel to the shaving direction with respect to the frame 200. In this case, the torsion spring 300 may provide the restoring force to the blade housing 100 not only for the pivoting about the first pivot axis ax1 of the blade housing 100 but also for the translation in the direction parallel to the shaving direction, thereby allowing the blade housing 100 to return to the first pivot rest position and/or the translation rest position.

[0080] However, it is not necessary that only the torsion spring 300 provide the restoring force for the translation in the direction parallel to the shaving direction of the blade housing 100, and a separate elastic member may be additionally included in the razor cartridge 10 to provide the restoring force for the translation.

[0081] In Figs. 3 and 4, the torsion spring 300 is illustrated as being configured as an integral part with the frame 200, but is not necessarily limited thereto, and may be configured as an integral part with the blade housing 100 or may be arranged as a separate component from the frame 200 and the blade housing 100.

[0082] When the torsion spring 300 is configured as an integral part with the frame 200, the blade housing 100 may include a coupling protrusion 175 formed to protrude from at least one surface thereof. In this case, the coupling protrusion 175 may be coupled with a spring groove 305 formed to penetrate the center of the torsion spring 300 to form the first pivot axis ax1. For example, the coupling protrusion 175 protrudes in a direction parallel to the first pivot axis ax1.

[0083] As the coupling protrusion 175 is coupled with the spring groove 305, not only is the coupling of the blade housing 100 and the frame 200 possible, but the position of the first pivot axis ax1 can also be determined. Meanwhile, the spring groove 305 may be configured to penetrate the torsion spring 300, but is not necessarily limited thereto, and a portion of the torsion spring 300 may be recessed.

[0084] In addition, the blade housing 100 may include a first central support unit 170 positioned in the central region in the longitudinal direction. The first central support unit 170 may be configured to support at least one razor blade 130. However, the present disclosure is not limited thereto, and the first central support unit 170 may be configured not to support at least one razor blade 130. When the first central support unit is included, the coupling protrusion 175 may be formed on the first central support unit 170.

[0085] More specifically, at least one razor blade 130 may be mounted on one surface of the first central support unit 170, and the coupling protrusion 175 may be formed on the other surface opposite to the one surface. In this case, the first pivot axis ax1 may penetrate the first central support unit 170.

[0086] However, the first pivot axis ax1 does not necessarily have to be configured to penetrate the first central support unit 170, and may be configured to penetrate the first lubrication band 160 or the second lubrication band 110 for appropriate pivot force adjustment, or the like.

[0087] Meanwhile, when the torsion spring 300 is configured as an integral part with the blade housing 100, the frame 200 may include a coupling protrusion 175, and the torsion spring 300 may be disposed on the other surface of the first central support unit 170.

[0088] The blade housing 100 may include a guide protrusion 180 formed by protruding from at least a portion of the outer surface. For example, a pair of guide protrusions 180 may be formed, each of which may protrude from one surface of both sides of the blade housing 100 in the longitudinal direction.

[0089] In response to this, at least one outer portion 220 may include a guide groove 280 formed by recessing at least a portion of an inner surface along the pivot direction with respect to the frame 200 of the blade housing 100. For example, when at least one outer portion 220 includes a pair of longitudinal portions 225, the guide groove 280 may be formed in each of the pair of longitudinal portions 225.

[0090] Since the guide protrusion 180 can move along the guide groove 280, it is possible to stably guide the pivoting of the blade housing 100 with respect to the frame 200.

[0091] At least one outer portion 220 may further include a stopper (not illustrated) protruding from the inner surface of the guide groove 280, and in this case, the stopper may limit the pivot of the blade housing 100 with respect to the frame 200.

[0092] For example, the stopper may be formed at one end portion of the guide groove 280 in the shaving direction and configured to engage with the guide protrusion 180 to limit the pivot range. The pivot range may be determined depending on the formation position of the stopper.

[0093] Figs. 3 and 4 illustrate that the blade housing 100 includes the guide protrusion 180 and the frame 200 includes the guide groove 280, but this is not necessarily limited to this, and the blade housing 100 may include the guide groove 280 and the frame 200 may include the guide protrusion 180. In this case, the stopper may be formed in the blade housing 100.

[0094] Meanwhile, the blade housing 100 may include at least one central opening 105 that opens through the housing top surface 102 and the housing bottom surface 104. Shaving residues inside the razor cartridge 10 may be discharged to the outside through the at least one central opening 105.

[0095] When the blade housing 100 includes the first central support unit 170, at least one central opening 105 may include two central openings 105 spaced apart from each other in the longitudinal direction with the first central support unit 170 interposed therebetween.

[0096] Referring again to Fig. 4, the frame 200 may be configured to pivot about the second pivot axis ax2 parallel to the longitudinal direction with respect to the razor handle by being connected to the razor handle or to a connector coupled with one side of the razor handle.

[0097] In this case, the frame 200 may include a connecting portion 240 and an elastic force support portion 250 disposed on the frame bottom surface 204.

[0098] The connecting portion 240 may be configured to be connected to a razor handle or a connector coupled with one side of the razor handle. By connecting the razor handle or the connector to the connecting portion 240, the pivoting movement of the razor cartridge 10 about the second pivot axis ax2 with respect to the razor handle may be enabled.

[0099] The elastic force support portion 250 may be positioned in front of the first pivot axis ax1 in the shaving direction, and the second pivot restoring force may be applied to the elastic force support portion 250 to return the frame 200 to the second pivot rest position in a state where the frame 200 pivots about the second pivot axis ax2 from the second pivot rest position. In addition, the second pivot axis ax2 can be positioned in front of the first pivot axis ax1 in the shaving direction.

[0100] Accordingly, interference between the pivoting movement about the first pivot axis ax1 and the pivoting movement about the second pivot axis ax2 can be minimized, and the first pivot restoring force for returning to the first pivot rest position may be applied to a point where the coupling protrusion 175 is formed, and the second pivot restoring force for returning to the second pivot rest position may be applied to a point where the elastic force support portion 250 is formed.

[0101] However, it is not necessary for the elastic force support portion 250 to be positioned in front of the first pivot axis ax1 or for the second pivot axis ax2 to be positioned in front of the first pivot axis ax1, and the relative positions of each may be changed depending on the structure of the blade housing 100 and the frame 200.

[0102] Fig. 5 is an exploded view of the razor cartridge 10 according to one embodiment including a first plate spring 500.

[0103] Fig. 6 is a view in which an example of a razor cartridge 10 according to one embodiment including the first plate spring 500 pivoting about the first pivot axis ax1 is taken along line A-A' of Fig. 1A and viewed from below.

[0104] Referring to Figs. 5 and 6, as an example of a first restoring force providing unit, the first plate spring 500 is illustrated, at least a portion of which may be configured to extend in a transverse direction perpendicular to the longitudinal direction, for example, in the direction parallel to the shaving direction. The first plate spring 500 may be configured such that at least a portion is fixedly positioned on the blade housing 100 or the frame 200, and at least another portion is deformed due to the pivoting of the blade housing 100 and the frame 200 with respect to each other.

[0105] For example, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least a portion of the first plate spring 500 may be deformed in the pivot direction, and the first pivot restoring force may be generated according to the degree of deformation.

[0106] In Figs. 5 and 6, the first plate spring 500 is illustrated as a separate configuration from the frame 200 and the blade housing 100, but it may also be configured as an integral part of the blade housing 100 or the frame 200.

[0107] When the first plate spring 500 is configured separately from the frame 200 and the blade housing 100, one side of the first plate spring 500 in the shaving direction may be configured to be fixed to the blade housing 100 and the other side thereof may be fixed to the frame 200.

[0108] For example, the blade housing 100 may include a first accommodation portion 190 formed on the housing bottom surface 104 and configured to accommodate at least a portion of the first plate spring 500, and the frame 200 may include a second accommodation portion 290 formed on the frame top surface 202 and configured to accommodate at least another portion of the first plate spring 500.

[0109] Accordingly, when the blade housing 100 and the frame 200 are coupled with each other by the first accommodation portion 190 and the second accommodation portion 290, the first plate spring 500 may be accommodated therebetween.

[0110] As illustrated in Figs. 5 and 6, the first plate spring 500 may include a head portion 502 and a body portion 504. For example, the head portion 502 may be formed on one side of the first plate spring 500 in the shaving direction, and the body portion 504 may be formed on the other side thereof.

[0111] In this case, the body portion 504 may extend in a direction parallel to the shaving direction, and a head portion 502 having a circular cross-section may be formed at one end of the body portion 504, but is not necessarily limited thereto. For example, the first plate spring 500 may not include the head portion 502, and in this case, the first plate spring 500 may have a shape that extends long in the direction parallel to the shaving direction as a whole.

[0112] In addition, the first accommodation portion 190 may accommodate the body portion 504, and the second accommodation portion 290 may accommodate the head portion 502, but this is not necessarily limited to this, and vice versa.

[0113] When the head portion 502 is accommodated in the second accommodation portion 290, the second accommodation portion 290 is configured so that at least a portion thereof is recessed from the frame top surface 202 so as to fix the position of the head portion 502. The first accommodation portion 190 may be configured to protrude from the housing bottom surface 104 so as to accommodate the body portion 504, and the body portion 504 accommodated in the first accommodation portion 190 may be at least partially deformed due to the pivoting of the blade housing 100 with respect to the frame 200.

[0114] Meanwhile, in order for the blade housing 100 and the frame 200 to be coupled with each other, one of the blade housing 100 and the frame 200 may include the coupling protrusion 175 formed to protrude from at least one surface thereof. In addition, the other of the blade housing 100 and the frame 200 may include a coupling groove 275 formed to be recessed in at least a portion thereof in a shape corresponding to the coupling protrusion 175. For example, the coupling protrusion 175 protrudes in a direction parallel to the first pivot axis ax1.

[0115] The coupling protrusion 175 and the coupling groove 275 may be coupled with each other to form the first pivot axis ax1. Therefore, when the coupling protrusion 175 is coupled with the coupling groove 275, not only is the coupling between the blade housing 100 and the frame 200 possible, but also the position of the first pivot axis ax1 can be determined.

[0116] Meanwhile, although not illustrated in the drawing, the coupling groove 275 may be formed to be long in the direction parallel to the shaving direction for the translation of the blade housing 100 in the direction parallel to the shaving direction. In this case, the coupling protrusion 175 may be moved along the extension direction of the coupling groove 275, so that translation of the blade housing 100 in the direction parallel to the shaving direction may be possible.

[0117] In this case, the razor cartridge 10 may further include a separate elastic member to provide a translation restoring force for the translation of the blade housing 100 in the direction parallel to the shaving direction.

[0118] Figs. 5 and 6 illustrate the blade housing 100 includes the coupling protrusion 175 and the frame 200 includes the coupling groove 275, but conversely, the frame 200 may include the coupling protrusion 175 and the blade housing 100 may include the coupling groove 275.

[0119] When the blade housing 100 includes the first central support unit 170, for example, at least one razor blade 130 may be mounted on one surface of the first central support unit 170, and the coupling protrusion 175 may be formed on the other surface opposite to that surface. In this case, the first pivot axis ax1 may penetrate the first central support unit 170.

[0120] However, the first pivot axis ax1 does not necessarily have to be configured to penetrate the first central support unit 170, and may be configured to penetrate the first lubrication band 160 or the second lubrication band 110 for appropriate pivot force adjustment, or the like.

[0121] Additionally, the frame 200 may include a second central support unit 270. The second central support unit 270 may be positioned in a region corresponding to the first central support unit 170 when the blade housing 100 and the frame 200 are coupled with each other, and one surface of the second central support unit 270 may be configured to be coupled with the first central support unit 170.

[0122] In this case, the coupling protrusion 175 may be formed on the first central support unit 170, and the coupling groove 275 may be formed on the second central support unit 270. The coupling groove 275 may be formed so that a portion thereof is recessed from one surface of the second central support unit 270, but is not necessarily limited thereto, and may be configured to penetrate the second central support unit 270.

[0123] Meanwhile, when the frame 200 includes the elastic force support portion 250, the elastic force support portion 250 may be located on one surface of the second central support unit 270, that is, on the other surface opposite to the surface facing the housing bottom surface 104.

[0124] Except for the matters described above, the descriptions related to the guide protrusion 180, the guide groove 280, the at least one central opening 105, the second pivot axis ax2, the connecting portion 240, and the elastic force support portion 250 may be the same as the descriptions for the embodiment including the torsion spring 300 described above, and therefore, will be omitted here.

[0125] Fig. 7 is an exploded view of the razor cartridge 10 according to one embodiment including a second plate spring 700.

[0126] Fig. 8 is a view in which an example of the razor cartridge 10 according to one embodiment including the second plate spring 700 pivoting about the first pivot axis ax1 is taken along line A-A' of Fig. 1A and viewed from below.

[0127] Referring to Figs. 7 and 8, the second plate spring 700 is illustrated as an example of the first restoring force providing unit, and at least a portion of the second plate spring may be configured to extend in the direction parallel to the longitudinal direction. The second plate spring 700 may be configured such that at least a portion thereof is fixedly positioned on the blade housing 100 or the frame 200, and at least another portion thereof is deformed due to the pivoting movement of the blade housing 100 and the frame 200 with respect to each other.

[0128] For example, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least a portion of the second plate spring 700 may be deformed in the pivoting movement direction, and the first pivot restoring force may be generated according to the degree of deformation.

[0129] In Figs. 7 and 8, the second plate spring 700 is illustrated as a separate configuration from the frame 200 and the blade housing 100, but it may also be configured as an integral part of the blade housing 100 or the frame 200.

[0130] When the second plate spring 700 is configured separately from the frame 200 and the blade housing 100, the central region of the second plate spring 700 in the longitudinal direction may be fixed to the blade housing 100 and both sides of the second plate spring may be fixed to the frame 200.

[0131] However, it is not necessarily limited to this, and the central region of the second plate spring 700 in the longitudinal direction may be fixed to the frame 200, and both sides thereof may be fixed to the blade housing 100.

[0132] The blade housing 100 may include the first accommodation portion 190 formed on the housing bottom surface 104 and configured to accommodate at least a portion of the second plate spring 700, and the frame 200 may include the second accommodation portion 290 formed on the frame top surface 202 and configured to accommodate at least another portion of the second plate spring 700.

[0133] Accordingly, when the blade housing 100 and the frame 200 are coupled with each other by the first accommodation portion 190 and the second accommodation portion 290, the second plate spring 700 can be accommodated therebetween.

[0134] When the central region of the second plate spring 700 in the longitudinal direction is accommodated in the second accommodation portion 290, the second accommodation portion 290 is configured to protrude from the frame top surface 202 so as to fix the position of the central region of the second plate spring 700 in the longitudinal direction. The first accommodation portion 190 is configured so that at least a portion thereof is recessed from the housing bottom surface 104 so as to accommodate both sides of the second plate spring 700 in the longitudinal direction, and at least a portion of the second plate spring 700 may be deformed due to the pivoting movement of the blade housing 100 with respect to the frame 200.

[0135] Meanwhile, when the coupling groove 275 is formed to be long in the direction parallel to the shaving direction, the second plate spring 700 can provide the restoring force to the blade housing 100 not only for the pivoting movement about the first pivot axis ax1 of the blade housing 100 but also for the translation in the direction parallel to the shaving direction, thereby allowing the blade housing 100 to return to the first pivot rest position and/or the translation rest position.

[0136] However, it is not necessary that only the second plate spring 700 provide the restoring force for the translation in the direction parallel to the shaving direction of the blade housing 100, and a separate elastic member may be additionally included in the razor cartridge 10 to provide the restoring force.

[0137] Except for the matters described above, descriptions related to the coupling protrusion 175, the coupling groove 275, the first central support unit 170, the second central support unit 270, the guide protrusion 180, the guide groove 280, the at least one central opening 105, the second pivot axis ax2, the connecting portion 240, and the elastic force support portion 250 may be the same as the descriptions for the embodiment including the first plate spring 500 described above, and therefore are omitted herein.

[0138] In one embodiment of the present disclosure illustrated in Figs. 9 to 17, the first restoring force providing unit is characterized in that the first restoring force providing unit includes an elastic portion. The elastic portion includes a fixed end whose position is fixed to the blade housing 100 or the frame 200, and a free end whose position is not fixed. When the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least a portion of the elastic portion may be elastically deformed, thereby providing the first pivot restoring force for the pivoting about the first pivot axis ax1. In addition, in some embodiments, the elastic portion may also provide the translation restoring force for the translation in the direction parallel to the shaving direction. Hereinafter, various embodiments of the elastic portion will be described with reference to Figs. 9 to 17.

[0139] Fig. 9 is an exploded view of the razor cartridge 10 according to one embodiment including a pair of first elastic portions 900.

[0140] Fig. 10 is a view in which an example of the razor cartridge 10 according to one embodiment including a pair of first elastic portions 900 pivoting about the first pivot axis ax1 is taken along line A-A' of Fig. 1A and viewed from below.

[0141] Referring to Figs. 9 and 10, as an example of a first restoring force providing unit, the pair of first elastic portions 900 that are formed to be spaced apart from each other in the longitudinal direction and extend substantially in the transverse direction is illustrated. Each of the pair of first elastic portions 900 may be configured such that one side thereof is fixed to the frame 200 and the other side thereof forms a free end.

[0142] For example, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least one free end of the pair of first elastic portions 900 may be deformed in the pivot direction or in the direction opposite to the pivot direction by the coupling protrusion 175, and a first pivot restoring force may be generated depending on the degree of deformation.

[0143] In this case, the coupling protrusion 175 may be configured to be in contact with the free ends of the pair of first elastic portions 900. In Figs. 9 and 10, one side of each of the pair of first elastic portions 900 is illustrated as being fixed to the frame 200, but is not necessarily limited thereto, and the one side may be fixed to the blade housing 100 as long as it is configured to be able to deform a portion of the pair of first elastic portions 900 according to the pivoting.

[0144] Additionally, each of the pair of first elastic portions 900 may be configured so that at least a portion thereof is bent. However, it is not necessarily limited thereto, and may be configured in a straight-line shape parallel to one direction.

[0145] When at least a portion of each of the pair of first elastic portions 900 is configured to be bent, a pair of bending region support units 950 configured to support the bent regions of the pair of first elastic portions 900 may be formed to protrude from the housing bottom surface 104.

[0146] The pair of bending region support units 950 may limit the pivot regions of the pair of first elastic portions 900. For example, the deformation range of the first elastic portion 900 may change depending on the position, size, and shape of the bending region support unit 950, and accordingly, the limitation to the pivot range of the blade housing 100 may also be changed.

[0147] In addition, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200 and then the external force is removed, the pair of bending region support units 950 may provide a first pivot restoring force to the pair of first elastic portions 900, thereby allowing the blade housing 100 to return to the first pivot rest position.

[0148] Meanwhile, in Figs. 9 and 10, each of a pair of first elastic portions 900 is illustrated as having a shape symmetrical to each other at the first pivot rest position, but is not necessarily limited thereto.

[0149] Except for the matters described above, descriptions related to the guide protrusion 180, the guide groove 280, the at least one central opening 105, the second pivot axis ax2, the connecting portion 240, and the elastic force support portion 250 and descriptions related to the translation restoring force in the direction parallel to the shaving direction may be the same as the descriptions of the embodiment including the torsion spring 300 described above, and therefore are omitted here.

[0150] Fig. 11 is an exploded view of the razor cartridge 10 according to one embodiment including a pair of second elastic portions 1100.

[0151] Fig. 12 is a view in which an example of the razor cartridge 10 according to one embodiment including the pair of second elastic portions 1100 pivoting about the first pivot axis ax1 is taken along line A-A' of Fig. 1A, and viewed from below.

[0152] Referring to Figs. 11 and 12, as an example of the first restoring force providing unit, the pair of second elastic portions 1100 that are formed spaced apart from each other in a longitudinal direction and extend substantially in the height direction are illustrated. Each of the pair of second elastic portions 1100 may be configured such that one side is fixed to the blade housing 100 and the other side forms a free end.

[0153] For example, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least one of the pair of second elastic portions 1100 may be deformed laterally by the frame 200, and the first pivot restoring force may be generated depending on the degree of deformation. In this case, the frame 200 may be configured to come into contact with the free ends of the pair of second elastic portions 1100 when coupled with the blade housing 100.

[0154] Meanwhile, the pivot range of the blade housing 100 may be changed depending on the position, size, and shape of the pair of second elastic portions 1100. In addition, the positions of the pair of second elastic portions 1100 illustrated in Figs. 11 and 12 may be changed in the transverse or longitudinal direction within a range that maintains the pivot angle θ of the blade housing 100 between 1° and 20° as described above.

[0155] In Figs. 11 and 12, one side of each of the pair of second elastic portions 1100 is illustrated as being fixed to the blade housing 100, but is not necessarily limited thereto, and may be fixed to the frame 200 as long as it is configured to be able to deform a portion of each of the pair of second elastic portions 1100 according to the pivoting.

[0156] Additionally, the pair of second elastic portions 1100 may be formed integrally with the guard 120, but is not necessarily limited thereto.

[0157] Except for the matters described above, descriptions related to the coupling protrusion 175, the coupling groove 275, the first central support unit 170, the second central support unit 270, the guide protrusion 180, the guide groove 280, the at least one central opening 105, the second pivot axis ax2, the connecting portion 240, and the elastic force support portion 250 and descriptions related to the translation restoring force may be the same as the descriptions for the embodiment including the second plate spring 700 described above, and therefore are omitted herein.

[0158] Fig. 13 is an exploded view of the razor cartridge 10 according to one embodiment including a pair of third elastic portions 1300.

[0159] Fig. 14 is a view in which an example of the razor cartridge 10 according to one embodiment including the pair of third elastic portions 1300 pivoting about the first pivot axis is taken along line A-A' of Fig. 1A and viewed from below.

[0160] Referring to Figs. 13 and 14, as an example of the first restoring force providing unit, the pair of third elastic portions 1300 extending substantially in the longitudinal direction from both sides of the second central support unit 270 in the longitudinal direction are illustrated. Each of the pair of third elastic portions 1300 may be configured such that one side thereof is fixed to the frame 200 and the other side thereof forms a free end.

[0161] For example, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least one of the pair of third elastic portions 1300 may be deformed in the pivot direction or in the direction opposite to the pivot direction by a pair of elastic portion accommodation units 1350 formed on the housing bottom surface 104, and the first pivot restoring force may be generated depending on the degree of deformation. In this case, each of the pair of elastic portion accommodation units 1350 may be configured to be accommodated by fitting each of the pair of third elastic portions 1300 in the height direction.

[0162] Meanwhile, the pivot range of the blade housing 100 may be changed depending on the position, size, and shape of the pair of third elastic portions 1300. In addition, in the free end side of the pair of third elastic portions 1300 illustrated in Figs. 13 and 14, the position of the free end side may be changed in the transverse or longitudinal direction within a range that maintains the pivot angle θ of the blade housing 100 between 1° and 20° as described above.

[0163] In Figs. 13 and 14, one side of each of the pair of third elastic portions 1300 is illustrated as being fixed to the frame 200, but it is not necessarily limited thereto, and the one side may be fixed to the blade housing 100 as long as a portion of each of the pair of third elastic portions 1300 is configured to be deformable according to the pivoting.

[0164] In addition, to prevent the pair of third elastic portions 1300 from being separated in a state of being accommodated in the pair of elastic portion accommodation units 1350, each of the pair of third elastic portions 1300 may include an elastic portion separation preventing unit 1305 formed on at least one surface.

[0165] Even when an external force in the height direction is applied to the pair of third elastic portions 1300, a state where the pair of third elastic portions 1300 is accommodated in the pair of elastic portion accommodation units 1350 can be maintained by the elastic portion separation prevention unit 1305, and further, separation of the frame 200 and the blade housing 100 can be prevented.

[0166] Except for the matters described above, descriptions related to the coupling protrusion 175, the coupling groove 275, the first central support unit 170, the second central support unit 270, the guide protrusion 180, the guide groove 280, the at least one central opening 105, the second pivot axis ax2, the connecting portion 240, and the elastic force support portion 250, and descriptions related to the translation restoring force may be the same as the descriptions for the embodiment including the second plate spring 700 described above, and therefore are omitted herein.

[0167] Fig. 15 is an exploded view of a razor cartridge 10 according to one embodiment including a pair of fourth elastic portions 1500.

[0168] Fig. 16 is a view in which an example of the razor cartridge 10 according to one embodiment including the pair of fourth elastic portions 1500 pivoting about the first pivot axis is viewed from below.

[0169] Fig. 17 is a view in which an example of the razor cartridge 10 according to one embodiment including the pair of fourth elastic portions 1500 being translated in the direction parallel to the shaving direction is viewed from below.

[0170] Referring to Fig. 15, as an example of the first restoring force providing unit, the pair of fourth elastic portions 1500 extending from both sides of the frame 200 in the longitudinal direction toward the central region of the frame 200 in the longitudinal direction is illustrated. Each of the pair of fourth elastic portions 1500 may be configured such that one side thereof is fixed to the frame 200 and the other side forms a free end.

[0171] For example, referring to Fig. 16, when the blade housing 100 pivots about the first pivot axis ax1 with respect to the frame 200, at least one of the pair of fourth elastic portions 1500 may be at least partially deformed by the blade housing 100, and the first pivot restoring force may be generated depending on the degree of deformation.

[0172] Moreover, referring to Fig. 17, the blade housing 100 may translate in the direction parallel to the shaving direction with respect to the frame 200. In this case, at least a portion of each of the pair of fourth elastic portions 1500 may be deformed by the blade housing 100, and the translation restoring force may be generated depending on the degree of deformation.

[0173] Accordingly, each of the pair of fourth elastic portions 1500 may provide the restoring force to the blade housing 100, and may also provide the restoring force to the blade housing 100 even when the pivoting about the first pivot axis ax1 of the blade housing 100 and the translation in a direction parallel to the shaving direction occur simultaneously. As a result, the blade housing 100 can be returned to the first pivot rest position and/or the translation rest position.

[0174] Since the first pivot restoring force and the translation restoring force are provided through the same configuration of the pair of fourth elastic portions 1500, the structure of the razor cartridge 10 can be simplified.

[0175] Additionally, the pair of fourth elastic portions 1500 may be spaced apart from each other in the longitudinal direction, and the first pivot axis ax1 may be disposed between the pair of fourth elastic portions 1500.

[0176] In Figs. 15 to 17, the pair of fourth elastic portions 1500 are illustrated as being integrally formed with the frame 200, but are not necessarily limited thereto and may be separate structures that can be coupled with the frame 200.

[0177] Meanwhile, Fig. 16 and Fig. 17 respectively illustrate a state in which the blade housing 100 pivots about the first pivot axis ax1 from the first pivot rest position and a state in which the blade housing 100 is translated in the direction parallel to the shaving direction. Here, a distance d by which one end portion of the blade housing 100 in the longitudinal direction is moved in the direction parallel to the shaving direction from the first pivot rest position and the translation rest position is the same in both states.

[0178] Based on the state in which the blade housing 100 is at the first pivot rest position and the translation rest position, the magnitude of the first pivot restoring force when the blade housing 100 pivots and one end portion of the blade housing 100 in the longitudinal direction moves by the predetermined distance d is smaller than the magnitude of the translation restoring force when the blade housing 100 is translated backward and moves by the predetermined distance. Therefore, the blade housing 100 can return to the first pivot rest position and the translation rest position more quickly in the state of Fig. 17 than in the state of Fig. 16.

[0179] Since the first pivot restoring force has a relatively smaller restoring force than the translation restoring force, the pivoting according to the skin curvature can occur more actively, which can enable a quick response to the stroke.

[0180] Meanwhile, the pivoting state and translation state illustrated in Figs. 16 and 17 are for comparing the relative sizes of the first pivot restoring force and the translation restoring force through the same standard, that is, the same moving distance d. Therefore, the maximum pivoting or maximum translation of the blade housing 100 should not be interpreted as being limited to the blade housing 100 being pivoted or translated as much as the moving distance d in Figs. 16 and 17. In addition, when actually shaving, the blade housing 100 does not necessarily have to pivot and translate as much as the same moving distance d.

[0181] As an example for making the translation restoring force greater than the first pivot restoring force, each of the pair of elastic portions 1500 may include a fixing end portion 1520, a bending portion 1540, and a free end portion 1560.

[0182] The fixing end portion 1520 may be fixed to one side of the frame 200 in the longitudinal direction and may substantially extend in the direction parallel to the longitudinal direction.

[0183] The bending portion 1540 may extend from one end of the fixing end portion 1520 and may be bent and extend so that at least a portion thereof faces forward in the shaving direction.

[0184] The free end portion 1560 may extend from one end of the bending portion 1540 and substantially extend in the direction parallel to the longitudinal direction.

[0185] The free end portion 1560 may be positioned in front of the fixing end portion 1520 in the shaving direction. As the blade housing 100 moves rearwardly, the pair of free end portions 1560 is deformed in a direction that brings them together to press the coupling protrusion 175, and thus, the translation restoring force may be provided to the blade housing 100 so as to be a relatively greater than the first pivot restoring force.

[0186] The blade housing 100 may include a coupling protrusion 175 formed to protrude from one surface in the direction parallel to the first pivot axis ax1, and the pair of fourth elastic portions 1500 may be coupled with the coupling protrusion 175.

[0187] In addition, the pair of fourth elastic portions 1500 may be assembled to the central region of the frame 200 in the longitudinal direction and may have a cantilever shape from one side of the frame 200 in the longitudinal direction, so that an assembly load can be reduced during hook coupling.

[0188] In addition, even when a force that separates the blade housing 100 from the frame 200 is applied to the razor cartridge 10, the pair of fourth elastic portions 1500 can be deformed at least partially in the height direction, thereby preventing separation of the blade housing 100 and the frame 200.

[0189] In addition, when an external impact, such as a drop, is applied to the razor cartridge 10, the pair of free end portions 1560 may be deformed in the direction in which they come together while the blade housing 100 is translated toward the rear with respect to the frame 200. In this case, the pair of free end portions 1560 may press the coupling protrusion 175, thereby preventing separation between the blade housing 100 and the frame 200.

[0190] Meanwhile, it can be assumed that the fixing end portion 1520 and the free end portion 1560 of each of the pair of fourth elastic portions 1500 are disposed on the same line in the shaving direction. For example, it can be assumed that the pair of fourth elastic portions 1500 extends in a straight line parallel to the longitudinal direction.

[0191] In the case where the fixing end portion 1520 and the free end portion 1560 are disposed on the same line in the shaving direction, and both the fixing end portion 1520 and the free end portion 1560 are positioned relatively forward (for example, the position of the free end portion 1560 of Fig. 15), the pair of fourth elastic portions 1500 may excessively overlap with the housing bottom surface 104 on which at least one razor blade 130 is disposed, and thus the rinsing function, that is, the discharge of shaving residues, or the like, may not be performed smoothly.

[0192] Conversely, when the fixing end portion 1520 and the free end portion 1560 are arranged on the same line in the shaving direction and both the fixing end portion 1520 and the free end portion 1560 are positioned relatively rearward (for example, the position of the fixing end portion 1520 in Fig. 15), the first pivot axis ax1 may move excessively rearward, causing the pivot center to be positioned at an undesirable location.

[0193] Accordingly, it is preferable that the pair of fourth elastic portions 1500 is configured such that the free end portion 1560 is positioned forward with respect to the fixing end portion 1520 in the shaving direction, thereby securing the pivot axis capable of providing a stable pivot while minimizing the influence on the rinsing function. However, the present disclosure is not limited thereto, and the pair of fourth elastic portions 1500 may be configured such that the fixing end portion 1520 and the free end portion 1560 may be positioned on the same line in the shaving direction, or the fixing end portion 1520 may be positioned forward with respect to the free end portion 1560.

[0194] The coupling protrusion 175 may include a pair of support grooves 172 formed on both sides thereof in the longitudinal direction, and each of the pair of support grooves 172 may be formed to be recessed into a shape corresponding to a free end portion of each of the pair of elastic portions 1500. The pair of support grooves 172 may be configured to come into contact with the free ends of the pair of fourth elastic portions 1500 when the blade housing 100 is coupled with the frame 200.

[0195] For example, when viewed from the frame bottom surface 204, the free end of each of the pair of fourth elastic portions 1500 may have an arc shape having a predetermined radius of curvature, each of the pair of support grooves 172 may also have an arc shape having a predetermined radius of curvature, and the free end of each of the pair of fourth elastic portions 1500 may move along the inner surface of each of the pair of support grooves 172.

[0196] In addition, in order to smoothly perform the pivoting about the first pivot axis ax1 of the blade housing 100, a line connecting the centers of the curvature radii of the pair of support grooves 172 may be configured to meet the first pivot axis ax1.

[0197] Meanwhile, when a user starts a stroke in the shaving direction, the blade housing 100 should be translated backward in to the shaving direction to provide a safe and smooth shave, so it is desirable to prevent the blade housing 100 from moving forward in the shaving direction at the translation rest position.

[0198] To this end, the frame 200 may include a stopping portion 1700 positioned forward in the shaving direction of the coupling protrusion 175 and configured to prevent forward movement of the blade housing 100 in the translation rest position.

[0199] In Figs. 15 to 17, a portion of the frame 200 is recessed in the direction parallel to the shaving direction and a portion of the front region of the coupling protrusion 175 is accommodated in the recessed region, thereby forming one surface of the frame 200 as the stopping portion 1700, but this is not necessarily limited thereto. For example, the stopping portion 1700 may also form one surface of the frame 200 as the stopping portion 1700, by a portion of the frame 200 protruding in a direction parallel to the shaving direction and a portion of the front region of the coupling protrusion 175 coming into contact with the protruded region.

[0200] Except for the matters described above, the descriptions related to the coupling protrusion 175, the guide protrusion 180, the guide groove 280, the at least one central opening 105, the second pivot axis ax2, the connecting portion 240, and the elastic force support portion 250 may be the same as the descriptions for the embodiment including the second plate spring 700 described above, and therefore, will be omitted here.

[0201] Fig. 18 is a couple perspective view of a razor cartridge 20 according to another embodiment of the present disclosure.

[0202] Fig. 19 is a view in which an example of the razor cartridge 20 according to another embodiment of the present disclosure pivoting about the first pivot axis is viewed from above.

[0203] Referring to Figs. 18 and 19, the razor cartridge 20 according to another embodiment of the present disclosure has at least a portion of at least one outer portion 220 disposed in front of the blade housing 100 in the shaving direction. For example, at least one outer portion 220 may be configured to surround both sides and the front of the blade housing 100 in the longitudinal direction.

[0204] In this case, the third lubricating band 210 may be configured to be adjacent to both sides and the front of the blade housing 100 in the longitudinal direction on the top surface of at least one outer portion 220. Accordingly, the lubricant can be applied more widely around the user's skin where shaving is performed.

[0205] However, it is not necessary that the third lubrication band 210 is configured to be adjacent to both sides and the front of the blade housing 100 in the longitudinal direction on the top surface of at least one outer portion 220. For example, the third lubrication band 210 may be configured to be adjacent to the outer surface of at least one outer portion 220 on the top surface of at least one outer portion 220.

[0206] In addition, the shape of at least one outer portion 220 is not necessarily limited to that illustrated in Figs. 18 and 19, and at least a portion of at least one outer portion 220 may be positioned at the rear of the blade housing 100 in the shaving direction, and at least one outer portion 220 may be configured to surround the entire outer surface of the blade housing 100 in the form of a closed loop.

[0207] Meanwhile, the razor cartridge 20 according to another embodiment may include a gap 1800 that is open in the height direction between the front and/or rear of the blade housing 100 and at least one outer portion 220.

[0208] In Figs. 18 and 19, it is illustrated that one gap 1800 is formed, but it is also possible to form them to be separated from each other in the longitudinal direction by the guard 120 or the second lubricating band 110.

[0209] Since the gap 1800 is open in the height direction of the razor cartridge 20, shaving residues can be easily discharged through the gap 1800. In addition, the gap 1800 can provide a space in which the blade housing 100 can pivot with respect to the frame 200.

[0210] In addition, it is possible to limit the pivot range of the blade housing 100 depending on the size of the gap 1800. For example, referring to Fig. 16, when the blade housing 100 pivots to the maximum, the pivot range can be limited by the front side of the blade housing 100 and at least one outer portion 220 coming into contact, and the point at which the two components come into contact may be changed depending on the size of the gap 1800.

[0211] The razor cartridge 20 according to another embodiment of the present disclosure may have the configuration and technical features included in the razor cartridge 10 according to one embodiment of the present disclosure, except for the matters described above. Since the configuration and technical features related to the razor cartridge 20 may be the same as the description of the razor cartridge 10 according to one embodiment of the present disclosure, the configuration and technical features are omitted herein.

[0212] The spirit of the present embodiment is illustratively described hereinabove. It will be appreciated by those skilled in the art to which the present embodiment pertains that various modifications and alterations may be made without departing from the essential characteristics of the present embodiment. Accordingly, the present embodiments are not to limit the spirit of the present embodiment, but are to describe the spirit of the present embodiment. The technical idea of the present embodiment is not limited to these embodiments. The scope of the present embodiment should be interpreted by the following claims, and it should be interpreted that all the spirits equivalent to the following claims fall within the scope of the present embodiment.

[DESCRIPTION OF REFERENCE NUMERALS]

[0213] 10, 20: razor cartrdige, 30: razor handle, 50: connector, 100: blade housing, 102: housing top surface, 104: housing bottom surface, 105: central opening, 110: second lubricating band, 120: gurad, 130: razor blade, 140: clip, 150: side opening, 160: first lubricating band, 170: first central support unit, 175: coupling protrusion, 180: guide protrusion, 190: fist accommodation portion, 200: frame, 202: frame top surface, 204: frame bottom surface, 210: third lubricating band, 220: outer portion, 225: longitudinal side portion, 240: connecting portion, 250: elastic force support portion, 270: second central support unit, 275: coupling groove, 280: guide groove, 290: second accommodation portion, 300: torsion spring, 305: spring groove, 500: first plate spring, 502: head portion, 504: body portion, 700: second plate spring, 900: first elastic portion, 950: bending area support unit, 1100: second elastic portion, 1300: third elastic portion, 1305: elastic portion separation preventing unit, 1350: elastic portion accommodation unit, 1500: fourth elastic portion, 1520: fixing end portion, 1540: bending portion, 1560: free end portion, 1700: stopping portion, 1800: gap, ax1: first pivot axis, ax2: second pivot axis

Claims

1. A razor cartridge (10, 20) comprising:

a blade housing (100) for accommodating at least one razor blade (130) having a cutting edge in a longitudinal direction, the blade housing (100) including a housing top surface (102) toward which the cutting edge faces and a housing bottom surface (104) opposite to the housing top surface (102); and

a frame (200) coupled with the blade housing (100),

characterized in that

the frame (200) being coupled with the blade housing (100) such that the blade housing (100) is pivotable with respect to the frame (200) about a first pivot axis (ax1) penetrating the blade housing (100).

2. The razor cartridge (10, 20) of claim 1, further comprising a restoring force providing unit (300, 500, 700, 900, 1100, 1300, 1500) configured to provide a first pivot restoring force, which returns the blade housing to a first pivot rest position in a state where the blade housing (100) is pivoted about the first pivot axis (ax1) from the first pivot rest position, to the blade housing (100).

3. The razor cartridge (10, 20) of claim 2, wherein the blade housing (100) is configured to be translated in a direction parallel to a shaving direction with respect to the frame (200), and
the restoring force providing unit (300, 700, 900, 1100, 1300, 1500) is configured to provide a translation restoring force, which returns the blade housing (100) to a translation rest position in a state where the blade housing (100) is translated with respect to the frame (200) in a direction parallel to the shaving direction from the translation rest position, to the blade housing (100).

4. The razor cartridge (10, 20) of claim 3, wherein based on a state where the blade housing (100) is at the first pivot rest position and the translation rest position, a magnitude of the first pivot restoring force when the blade housing (100) pivots and one end portion of the blade housing (100) in the longitudinal direction moves by a predetermined distance is smaller than a magnitude of the translation restoring force when the blade housing (100) is translated backwards in the shaving direction and moves by the predetermined distance.

5. The razor cartridge (10, 20) of claim 3, wherein the restoring force providing unit (900, 1300, 1500) includes a pair of elastic portions (900, 1300, 1500) configured to be at least partially deformed due to the pivoting and/or translation of the blade housing (100) and the frame (200) with respect to each other,
one end portion of each of the pair of elastic portions (900, 1300, 1500) is fixed to the frame, and the other end portion of each of the pair of elastic portions (900, 1300, 1500) forms a free end.

6. The razor cartridge (10, 20) of claim 5, wherein each of the pair of elastic portions (1500) is configured such that the free end portion (1560) is positioned in front of the fixing end portion (1520) in the shaving direction.

7. The razor cartridge (10, 20) of claim 5, wherein the pair of elastic portions (900, 1300, 1500) is spaced apart from each other in the longitudinal direction, and
the first pivot axis (ax1) is disposed between the pair of elastic portions (900, 1300, 1500).

8. The razor cartridge (10, 20) of claim 5, wherein the blade housing (100) includes a coupling protrusion (175) formed by protruding from one surface thereof, and
the pair of elastic portions (1500) are configured to be coupled with the coupling protrusion (175).

9. The razor cartridge (10, 20) of claim 8, wherein the coupling protrusion (175) includes a pair of support grooves (172) formed on both sides thereof in the longitudinal direction, and
each of the pair of support grooves (172) is formed to have a shape corresponding to the free end portion (1560) of each of the pair of elastic portions (1500).

10. The razor cartridge (10, 20) of claim 8, wherein the frame (200) includes a stopping portion (1700) that is positioned in front of the coupling protrusion (175) in the shaving direction and configured to prevent the blade housing (100) from moving forward at the translation rest position.

11. The razor cartridge (10, 20) of claim 1, further comprising a guard (120) disposed in front of the at least one razor blade (130) in the shaving direction,
the first pivot axis (ax1) is positioned at the rear of the guard (120).

12. The razor cartridge (10, 20) of claim 1, wherein the blade housing (100) includes a first central support unit (170) configured to be positioned in a central region in the longitudinal direction, and
the first pivot axis (ax1) is configured to penetrate the first central support unit (170).

13. The razor cartridge (10, 20) of claim 1, wherein the frame (200) is configured to pivot with respect to the razor handle (30) about a second pivot axis (ax2) parallel to the longitudinal direction by being connected to a razor handle (30) or a connector (50) coupled with one side of the razor handle (30).

14. The razor cartridge (10, 20) of claim 13, wherein the frame (200) includes:

a frame top surface (202) adjacent to the housing top surface (102),

a frame bottom surface (204) opposite to the frame top surface (202), and

an elastic force support portion (250) formed on the frame bottom surface (204) to be disposed in front of the first pivot axis (ax1) in the shaving direction, and

a second pivot restoring force, which returns the frame (200) to the second pivot rest position in a state where the frame (200) is pivoted about the second pivot axis from the second pivot rest position, is applied to the elastic force support portion (250).

15. The razor cartridge (10, 20) of claim 14, wherein the second pivot axis (ax2) is disposed in front of the first pivot axis (ax1) in the shaving direction.

Drawing