A domestic oven having a door lock mechanism

Abstract

 The invention is a domestic oven (1) having at least one cooking chamber (12) encircled by an outer body (10); a door (20) providing access to the cooking chamber (12) in an open position; and a lock mechanism (40) providing locking of said door (20) in a closed position. The lock mechanism (40) of the domestic oven (1) comprises a bearing piece (43) placed to a groove (211) formed on an outer wall (21) of the door (20); and a locking lever (44) hinged to the bearing piece (43) through a bearing opening (431) so as to stay at an inner side (213) of the outer wall (21).

Description

[0001] The present invention relates to cooking devices having a lock mechanism, for safety purposes, provided on the door of the cooking device in order to prevent opening of said door in undesired cases. The cooking device is particularly a domestic oven.

[0002] Cooking devices may have one or more than one cooking chamber. In order to reach an inner section of the cooking chambers, a door is hinged to the cooking chambers in an openable manner. By using the door, the foodstuff, which is to be cooked, is placed into the cooking chamber. Depending on the properties of some cooking devices, besides foodstuff drying, different processes can be applied inside the cooking device.

[0003] However, since the temperature inside the cooking chambers can reach a high temperature like 200 °C, an insulation is provided on the door. By means of said insulation, the door temperature has been reduced to temperature degrees which will not burn the hand of the user when the user touches the door from outside. However, temperatures like 60- 70 °C may burn the hand of the user. However, children or some old people may open the door in an unaware manner. This leads to an important safety problem for said children or old people. While the cooking device is operating, the child or the person may try to reach the inner side by opening the door in an unaware manner. In this case, the child or the person may be burnt or subject to electric shock hazard.

[0004] In order to take precaution for these risks, door lock mechanisms, which provide safety, are provided in the related art. One of these is a household appliance described in the patent document with publication number WO2004005653. There is an engaging means which is disposed on the door and a closure means which is arranged on the housing of the household appliance and is configured such that the engaging means engages in a non-positive manner with the closure means when the door is opened so as to prevent the door from being completely opened.

[0005] Another embodiment is a cooking device described in the patent document with publication number EP0678710. The oven door in the closed position is lockable by means of a manually operable and releasable locking device for child safety purposes. On the door outside is provided a manually displaceable push key parallel to the door panel, which is connected to a stop lever.

[0006] The object of the present invention is to provide assembly of the door lock mechanism to an outer wall of the domestic oven door and to support the door lock mechanism by means of this section.

[0007] In order to realize said object, the present invention is a domestic oven having at least one cooking chamber encircled by an outer body; a door providing access to the cooking chamber in an open position; and a lock mechanism providing locking of said door in a closed position. The lock mechanism of the domestic oven comprises a bearing piece placed to a groove formed on an outer wall of the door; and a locking lever hinged to the bearing piece through a bearing opening so as to stay at a rear side of the outer wall. Thus, the door lock mechanism is assembled to an outer wall of the door of the domestic oven and it is supported by means of this section.

[0008] The lock mechanism extends between the door lever and the inner wall. If it is on the door, it is hidden in the remaining section between the outer wall and the inner wall. Thus, the lock mechanism cannot be distinguished when viewed from outside.

[0009] In a probable embodiment of the present invention, the locking lever is directly hinged to the bearing piece. Thus, the triggering element can indirectly activate the locking lever or the locking lever can be activated through the bearing piece. Therefore, items like button, magnetic element, magnetic sensor, etc. can be positioned on the bearing piece in a manner activating the locking lever.

[0010] In another probable embodiment of the present invention, the locking lever is fixed to an extension of the triggering element passing through the bearing opening, and it is hinged to the bearing piece. Thus, the triggering element can directly activate the locking lever.

[0011] In another probable embodiment of the present invention, the bearing piece is made of a flexible plastic material. Thus, the bearing piece can be easily placed to the groove of the outer wall.

[0012] In another probable embodiment of the present invention, the walls of the bearing opening of the bearing piece are made of hard plastic material. Thus, the triggering element is prevented from melting the bearing piece as a result of the effect of the friction force.

[0013] In another probable embodiment of the present invention, the bearing piece comprises a stepped section formed so as to provide placement to the groove of the outer wall. Thus, the stepped section is completely placed to the groove such that the bearing piece does not form a protrusion from the front side of the outer wall.

[0014] In another probable embodiment of the present invention, the lock mechanism comprises a trigger housing providing enclosure of the triggering element. Thus, the triggering element is both hidden and enclosed on the front side of the outer wall.

[0015] In another probable embodiment of the present invention, the bearing piece comprises a fixation opening providing fixation of the trigger housing to the outer wall of the door by means of a fixation element. Thus, the trigger housing can be fixed to the outer wall of the door in a connected manner to the bearing piece. And thus, a more resistant structure is obtained.

[0016] In another probable embodiment of the present invention, the axis of assembly of the triggering element to the outer wall and the axis of assembly of the bearing piece to the outer wall groove are coaxial. Thus, the triggering element is bedded in the bearing piece in a coaxial manner.

[0017] In another probable embodiment of the present invention, the locking lever of the lock mechanism extends in an orthogonal manner with respect to the assembly axis. Thus, the locking lever is guided towards the region on the domestic oven where locking will be realized.

[0018] In another probable embodiment of the present invention, the locking lever extends so as to engage into a locking opening formed on a flange of the body. Thus, locking is provided.

[0019] In another probable embodiment of the present invention, the locking lever comprises a latch section having a curved end engaging into the locking opening. Thus, the latch section of the locking lever can easily enter into and exit from the locking opening.

In Figure 1,

a frontal perspective view of the pieces of the subject matter lock mechanism is given in dismantled form.

In Figure 2,

a frontal perspective view where a subject matter bearing piece is assembled to an outer wall of the door is given. Detail A is the zoomed assembled view of the bearing piece given in Figure 2.

In Figure 3,

a frontal dismantled perspective view of the lock mechanism and a door of the cooking device is given.

In Figure 4,

a rear dismantled perspective view of the lock mechanism and a door of the cooking device is given.

In Figure 5,

a frontal perspective view of a cooking device having a lock mechanism is given.

[0020] The present invention relates to a domestic oven (1) having a lock mechanism (40) provided on the door (20) of the cooking device in order to prevent opening of said door (20) in undesired cases for safety purposes and in order to provide opening of the door (20) only in an aware manner.

[0021] The domestic oven (1) generally has the functions of cooking in oven and cooking on gas stove. For cooking in oven, there is at least one cooking chamber (12). The gas stove section has burners (13) placed on an upper plate thereof. The turn on/off functions of the burners (13) and the gas flow setting are realized through a setting button (15) provided on a front panel (14) of the domestic oven (1) (Figure 5).

[0022] The subject matter lock mechanism (40) essentially comprises a trigger housing (41); a triggering element (42) which is partially placed into the trigger housing (41); a spring (45) providing movement of the triggering element (42) in a triggering direction (b); a bearing piece (43) providing fixation of the lock mechanism (40) on the door (20) and through which the triggering element (42) passes; and a locking lever (40) fixed to the triggering element (42) (Figure 1). The particularly most important section of the subject matter lock mechanism (40) is the bearing piece (43).

[0023] The subject matter bearing piece (43) provides fixation of the lock mechanism (40) on an outer wall (21) of the door (20) and provides supporting of the lock mechanism (40) from a point in order for operation of said lock mechanism (40). Therefore, the bearing piece (43) is placed to a groove (211), provided on the outer wall (21), from a stepped section (432) (Figure 2, Detail A). The form of the groove (211) is such that the stepped section (432) of the bearing piece (43) is placed to the groove (211) (Figure 2). In order for the bearing piece (43) to be fixed, a fixation element (not illustrated in the figure) like screw, etc. is passed through a fixation opening (430) formed thereon. The screw, passed through the fixation opening (430), extends up to a connection hole (411) of the trigger housing (41). The trigger housing (41) is fixed to a door lever (30) of the domestic oven (1) through the connection hole (411). Thus, the screw provides the door lever (30) to be assembled to the outer wall (120) by providing fixation in the two regions. Another opening formed on the bearing piece (43) is the bearing opening (431). An extension (422) of the triggering element (42) passes through the bearing opening (431). During assembly, the triggering element (42) may advance until a stop protrusion (424) seats onto the bearing piece (43), and here, it reaches a fixed position. The bearing piece (43) is made of a flexible plastic material.

[0024] As can be seen in Figure 1, 3 and 4, the trigger housing (41) has the same external appearance with the form of a connection element (32) providing assembly of a door lever (30) to the door (20). Both elements comprise a stop section (320, 410) in a manner closing an opening (310) on one lateral side of the door lever (30), and a connection hole (321, 411) providing assembly to the door lever (30). The connection holes (321, 411) correspond to the holes (311) formed on a profile (31) of the door lever (30). The subject matter trigger housing (41) has a form providing positioning of the triggering element (42) therein and providing movement thereof in a triggering direction (b). As can be seen in Figure 4, a groove (412) is formed on a rear side of the trigger housing (41), and a slit (414) is formed on a wall thereof. The triggering element (42) which is to be positioned inside the groove (412) of the trigger housing (41) is engaged to a bearing extension (413) extending into the trigger housing (41). The bearing extension (413) is a cylindrical extension. Accordingly, the triggering element (42) comprises a cylindrical channel (421). The width of the slit (414) provides a trigger movement interval (a). The ribs (not illustrated in the figures) embodied inside the trigger housing (41) reinforce the resistance of the trigger housing (41). In Figure 2, the trigger housing (41) is illustrated; and in Figure 3, the trigger element (42) is illustrated in a detailed manner. The triggering element (42) has a trigger latch (420) which will move in the trigger movement interval (a). The trigger latch (420) extends in an orthogonal manner with respect to a body of the trigger element (42), and it is in the form of an extension. Channel (421) is formed at one end of the body, and the other end of the body is in an extension (422) form, and it has a "D" cross section. A step (423) is embodied at this end section. The locking lever (44) is fixed to the triggering element (42) from this section so as to stop onto the step (423).

[0025] In Figure 3, a frontal dismantled perspective view of the lock mechanism (40) and a door (20) of the domestic oven (1) is given. The lock mechanism (40) is assembled to the door (20) in the direction of an assembly axis (c). The items provided on an outer side (212) of the outer wall (21) of the door (20) are the door lever (30); the connection element (32) providing assembly of the door lever (30) to the outer wall (21); and the bearing piece (43). The locking lever (44) and a section of the extension (422) of the triggering element (42) whereto the locking lever (44) is fixed are staying on the inner side (213) of the outer wall (21).

[0026] In Figure 4, a rear dismantled perspective view of the lock mechanism (40) and a door (20) of the domestic oven (1) is given. As can be seen from the given figures, the door (20) of the domestic oven (1) comprises an outer wall (21) and an inner wall (22) in order to provide insulation of the door (20). The lock mechanism (40) extends between the door lever (30) and the inner wall (22).

[0027] The outer wall (21) and the inner wall (22) of the door (20) are assembled to each other. An opening (221) is formed on a flange (220) of the inner wall (22) of the door (20) in order for engagement of the latch section (442) of the lock mechanism (40) (Figure 3). A locking opening (110) is formed on a flange (111) of the body (10) of the domestic oven (1) in a manner corresponding to said opening (221) (Figure 5). The flange (11) of the body (10) extends in an orthogonal manner with respect to an outer wall (120) of the cooking chamber (12). When the door (20) of the domestic oven (1) is closed, the flange (11) of the body (10) and the flange (220) of the inner wall (22) of the door (20) correspond to each other in a parallel manner. As can be seen from the given figures, the spring (45) is engaged and fixed onto the triggering element (42), and it stays inside the trigger housing (41). The spring (45) provides movement of the triggering element (42) towards a triggering direction (b) to a second position, and provides return of the triggering element (42) to a first position when the triggering element (42) is released.

[0028] The locking lever (44) is a one-piece lever fixed from a fixation section (440) to a triggering element (42). In this section, the locking lever (44) is fixed to the triggering element (42) from outside by means of a fixation element (not illustrated in the figures) like cover, etc. An opening (4401) is formed on the fixation section (440). The opening (4401) is preferably in a form similar to letter "D". The extension (422) of the triggering element (42) passes through the opening (4401). The form, which is similar to letter "D", provides the locking lever (44) to make a semi-circular movement. Thus, a latch section (442) can easily enter into and exit from the locking opening (110) of the flange (11). The locking lever (44) is essentially in the form of an extension, and an extension section (441) forms the intermediate section thereof. In this manner, the locking lever (44) extends in an orthogonal manner with respect to the assembly axis (c). The latch section (442) is formed in a free end of the extension section (441). The section of the latch section (442), which contacts the flange (11) during locking, is curved. An extension section (441) and latch section (442) extend outwardly from opening (221) of the flange (220) of the inner wall (22) of the door (20). During locking, the latch section (442) enters into the locking opening (110) of the flange (11) of the body (10), which corresponds to the flange (220) of the inner wall (22).

[0029] In more details, the operation of the present invention is as follows. When a trigger latch (420), provided in a trigger housing (41) on the door lever (30) and which is not directly visible, is pulled in the triggering direction (b) by the user, the lock is released. Meanwhile, the door (20) of the domestic oven (1) is pulled frontally and opened. While the trigger latch (420) is released and the door (20) is closed, the locking is realized by means of engagement of the latch section (442) of the locking lever (44) into the locking opening (110) provided on the body (10). Since the trigger latch (420) is provided on a bottom wall of the trigger housing (41), it is not visible at the first glance. However, it can be found by persons who know the presence of the lock mechanism (40). At the same time, when the domestic oven (1) is viewed from outside, the lock mechanism (40) is not visible. By means of this, the uncontrolled opening of the door (20) by children or by persons is prevented.

[0030] The subject matter bearing piece (43) provides the lock mechanism (40) to be fixed to the outer wall (21) of the door (20) of the domestic oven (1). At the same time, it is a support point which is needed for the operation of the lock mechanism (40). The trigger housing (41) and the door lever (30) are fixed to the outer wall (120) through the fixation opening (430) of the bearing piece (43). The extension (422) of the triggering element (42) of the lock mechanism (40) passes through the bearing opening (431). Thus, in order for the triggering element (42) to be moved in the triggering direction (b), the triggering element (42) is supported on the outer wall (21) of the door (20). The locking lever (44) fixed to the extension (422) of the triggering element (42) is released by means of movement of the trigger latch (420) in the triggering direction (b). The triggering element (42) and the locking lever (44), which move together, are hinged to the door (20) by means of the bearing piece (43).

[0031] The assembly axis (c) of the lock mechanism (40) is parallel with respect to an extension direction of the body (10) flange (11).

[0032] In an alternative embodiment of the present invention, the bearing opening (431) of the bearing piece (43) may be Teflon coated or it may be a metal O-ring. Thus, the bearing piece (43) is prevented from being melted by the triggering element (42) as a result of the effect of the friction force.

REFERENCE NUMBERS

[0033] 

1. Domestic oven
10. Body	40. Lock mechanism
11. Flange	41. Trigger housing
110. Locking opening	410. Stop section
12. Cooking chamber	411. Connection hole
120. Outer wall	412. Groove
13. Burner	413. Bearing extension
14. Front panel	414. Slit
15. Setting button	42. Triggering element
	420. Trigger latch
20. Door	421. Channel
21. Outer wall	422. Extension
211. Groove	423. Step
212. Outer side	424. Stop protrusion
213. Inner side	43. Bearing piece
22. Inner wall	430. Fixation opening
	431. Bearing opening
220. Flange	432. Stepped section
221. Opening	44. Locking lever
30. Door lever	440. Fixation section
31. Profile	4401. Opening
310. Opening	441. Extension section
311. Hole	442. Latch section
32. Connection element	45. Spring
320. Stop section
321. Connection hole
a. Trigger movement interval
b. Triggering direction
c. Assembly axis

Claims

1. A domestic oven (1) having at least one cooking chamber (12) encircled by an outer body (10); a door (20) providing access to the cooking chamber (12) in an open position; and a lock mechanism (40) providing locking of said door (20) in a closed position, wherein the lock mechanism (40) of the domestic oven (1) comprises a bearing piece (43) placed to a groove (211) formed on an outer wall (21) of the door (20); and a locking lever (44) hinged to the bearing piece (43) through a bearing opening (431) so as to stay at an inner side (213) of the outer wall (21).

2. A domestic oven (1) according to claim 1; wherein the locking lever (44) is directly hinged to the bearing piece (43).

3. A domestic oven (1) according to claim 1; wherein the locking lever (44) is fixed to an extension (422) of the triggering element (42) passing through the bearing opening (431) and placed from an outer side (212) of the outer wall (21), and said locking lever (44) is hinged to the bearing piece (43).

4. A domestic oven (1) according to claim 1; wherein the bearing piece (43) is made of a flexible plastic material.

5. A domestic oven (1) according to anyone of the preceding claims; wherein the walls of the bearing opening (431) of the bearing piece (43) are made of hard plastic material.

6. A domestic oven (1) according to anyone of the preceding claims; wherein the bearing piece (43) comprises a stepped section (432) formed so as to provide placement to the groove (211) of the outer wall (21).

7. A domestic oven (1) according to claim 3; wherein the axis (c) of assembly of the triggering element (42) and the axis of assembly of the bearing piece (43) are coaxial.

8. A domestic oven (1) according to anyone of the preceding claims; wherein the locking lever (44) of the lock mechanism (40) extends in an orthogonal manner with respect to the assembly axis (c).

9. A domestic oven (1) according to anyone of the preceding claims; wherein the locking lever (44) extends so as to engage into a locking opening (110) formed on a flange (11) of the body (10).

10. A domestic oven (1) according to claim 11; wherein the locking lever (44) comprises a latch section (442) having a curved end engaging into the locking opening (110).

Drawing