(19)
(11)EP 2 642 189 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
22.05.2019 Bulletin 2019/21

(21)Application number: 13160072.8

(22)Date of filing:  20.03.2013
(51)International Patent Classification (IPC): 
F21S 41/19(2018.01)

(54)

Vehicular lamp

Fahrzeuglampe

Lampe véhiculaire


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 22.03.2012 JP 2012065093

(43)Date of publication of application:
25.09.2013 Bulletin 2013/39

(73)Proprietor: KOITO MANUFACTURING CO., LTD.
Minato-ku, Tokyo 108-8711 (JP)

(72)Inventor:
  • Tsukamoto, Hironori
    Shizuoka-shi, Shizuoka 424-8764 (JP)

(74)Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)


(56)References cited: : 
FR-A1- 2 865 524
US-A1- 2007 177 401
JP-A- 2003 212 039
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    BACKGROUND OF THE INVENTION


    1. Field of the Invention



    [0001] The invention relates to a vehicular lamp. More particularly, the invention relates to a technical field for improving workability related to the assembly of a circuit board provided in a vehicular lamp.

    2. Description of Related Art



    [0002] Japanese Patent Application Publication No. 2010-73620 (JP 2010-73620 A), for example, describes a vehicular lamp, in which a light source is arranged inside a lamp outer casing formed of a cover and a lamp body, and a drive current is supplied to the light source from a power supply circuit via a circuit board having a conductive pattern that functions as an electrically-conducting path of the drive current.
    Moreover, JP 2003-212039 A discloses a vehicle light tool that is provided with a bulb socket having an opening insertable with the bulb and provided with contact electrodes electrically connected to electrodes of the bulb. The vehicle light tool is provided with an LED assembly that is electrically connected to the contact electrodes and emits light when it is inserted instead of the bulb. The LED assembly is provided with an insulation base that is inserted into the bulb socket and having a required length; electrodes that are electrically connected to the contact electrodes when they are inserted; the LED is mounted on the insulation film base; and a current control element for applying a current to the LED.

    [0003] In the vehicular lamp described in JP 2010-73620 A, the circuit board on which the light source is mounted is arranged inside the lamp outer casing, and a harness that is connected to the circuit board is pulled out from the lamp body and connected to the power supply circuit.

    [0004] However, with the vehicular lamp described in JP 2010-73620 A, the structure is such that the drive current is supplied to the light source via the circuit board by the harness and therefore, it is necessary to perform both work to connect the harness to the circuit board by soldering, and work to pull the harness around inside and outside of the lamp body.

    [0005] Therefore, the work related to the circuit board is troublesome and therefore, there is room for improvement to improve workability related to the assembly and the like of the circuit board.

    SUMMARY OF THE INVENTION



    [0006] The invention provides a vehicular lamp, with which it is possible to improve workability related to the assembly and the like of a circuit board provided in the vehicular lamp.

    [0007] According to the present invention said object is solved by a vehicular lamp having the features of the independent claim 1. Preferred embodiments are laid down in the dependent claims.

    [0008] Accordingly, in this vehicular lamp, the circuit board is held by the elastic connecting terminal portion that is connected to the electrode portion.

    [0009] Therefore, a harness for supplying drive current to the light source is not necessary, so that neither the work of connecting a harness to the circuit board by soldering nor the work of pulling the harness around inside and outside of the lamp body is needed. Hence, workability related to the assembly of the circuit board and the like is improved.

    [0010] The vehicular lamp according to the above aspect includes an engaging portion that prevents relative movement of the contact member with respect to the lamp body in a longitudinal direction of the plug connecting portion.

    [0011] With the above configuration, it is possible to prevent the contact member from coming off the lamp body when the power supply plug is attached and detached to and from the plug connecting portion, and a stable joined state of the contact member with respect to the lamp body is ensured.

    [0012] In the vehicular lamp according to the above aspect, the engaging portion is configured not to prevent the relative movement of the contact member to a fixation position, at which the contact member is fixed, during assembly of the contact member and configured to prevent the relative movement of the contact member from the fixation position. According to the invention the engaging portion include: an engaging protrusion that is provided on the lamp body, and has an engaging surface that faces in a direction of the relative movement, during assembly, of the contact member with respect to the lamp body; and a first elastic engagement portion that is provided on the contact member, that is inclined such that an amount of jutting-out of the first elastic engagement portion from the contact member increases in a direction opposite the direction of the relative movement, during assembly, of the contact member with respect to the lamp body, and that is formed by cutting and bending up a portion of the contact member. It is preferable that the engaging protrusion have an inclined surface that is inclined such that an amount of jutting-out of the engaging protrusion from the lamp body increases in the direction of the relative movement, during assembly, of the contact member with respect to the lamp body.

    [0013] With the above configuration, the contact member is easily and reliably joined to the lamp body, and a stable joined state of the contact member with respect to the contact holder is ensured.

    [0014] It is preferable that the vehicular lamp according to the above aspect further include a contact holder that is made of nonconductive material and is retained in the socket, wherein the contact member is joined to the contact holder and arranged inside the socket.

    [0015] With the above configuration, by designing the shape and size of the contact holder according to the shape and size of the contact member, the contact member will become able to be retained in the socket regardless of its shape and size, so that the degree of freedom in the design of the contact member is improved.

    [0016] In the vehicular lamp according to the above aspect, it is preferable that a retaining portion be formed on the contact holder, an elastically deformable second elastic engagement portion be provided on the contact member, and the second elastic engagement portion be engaged with the retaining portion to join the contact member to the contact holder. It is preferable that the retaining portion be provided on the contact holder, and have a surface that faces in a direction of movement, during assembly, of the contact member relative to the contact holder, and the second elastic engagement portion be provided on the contact member, be inclined such that an amount of jutting-out of the second elastic engagement portion from the contact member increases in a direction opposite the direction of the movement, during assembly, of the contact member relative to the contact holder, and be formed by cutting and bending up a portion of the contact member.

    [0017] With the above configuration, the contact member is simply and reliably joined to the contact holder, and a stable joined state of the contact member with respect to the contact holder is ensured.

    [0018] It is preferable that the vehicular lamp further include: an isolation portion that is provided on at least the one end portion of the circuit board, and on one surface of which the electrode portion is formed; and a heat radiating portion that is provided on at least the one end portion of the circuit board, that contacts the other surface of the isolation portion, and that is made of metallic material, wherein the heat radiating portion is pressed against a nonconductive portion by the restoring force of the connecting terminal portion elastically deformed.

    [0019] With the above configuration, it is possible to inhibit a short in the circuit board.

    [0020] In the vehicular lamp according to the above aspect, it is preferable that the socket be integrally formed with the lamp body.

    [0021] With the above configuration, the manufacturing cost is reduced owing to the decrease in the number of parts.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0022] Features, advantages, and technical and industrial significance of exemplary embodiments of the invention will be described below with reference to the accompanying drawings, in which like numerals denote like elements, and wherein:

    FIG. 1 is a sectional view schematically showing a vehicular lamp according to one embodiment of the invention;

    FIG. 2 is an enlarged sectional view showing a state in which a contact holder and contact members are inserted in a socket according to the embodiment;

    FIG. 3 is an enlarged exploded perspective view of the socket, a circuit board, and a plug according to the embodiment;

    FIG. 4 is an enlarged exploded perspective view of the socket, the contact holder, and the contact member according to the embodiment;

    FIG. 5 is an enlarged sectional view of a modification of the socket and the contact members according to the embodiment, in a state in which contact members are inserted in a socket ; and

    FIG. 6 is an enlarged exploded perspective view of the socket and the contact members shown in FIG. 5.


    DETAILED DESCRIPTION OF EMBODIMENTS



    [0023] Embodiments of a vehicular lamp of the invention will hereinafter be described with reference to the accompanying drawings.

    [0024] In the description below, the directions of front, rear, up, down, left, and right, are referred to with the direction in which the light source is directed, i.e., the direction in which light from the light source is emitted, being forward (i.e., the front).

    [0025] The directions of front, rear, up, down, left, and right are used merely to facilitate the description. Embodiments of the invention are not limited by these directions.

    [0026] As shown in FIG. 1, a vehicular lamp 1 includes a lamp body 2 that has a recessed portion that is open to the front, and a cover 3 that covers the opening of the lamp body 2. A lamp outer casing 4 is formed of the lamp body 2 and the cover 3. A space inside the lamp outer casing 4 is formed as a lamp chamber 5.

    [0027] A socket 6 that protrudes to the rear is connected to a rear surface portion 2a of the lamp body 2. The socket 6 may be formed using a member separate from the lamp body 2. Alternatively, the socket 6 may be formed integrally with the lamp body 2. Forming the socket 6 integrally with the lamp body 2 reduces the manufacturing cost, owing to the decrease in the number of parts.

    [0028] A circuit board 7 is arranged in a position extending from the lamp chamber 5 into the socket 6. A portion of the circuit board 7, excluding a rear end portion thereof, is attached to an attaching member, not shown, that is arranged in the lamp chamber 5. Any of various types of rigid circuit boards such as a glass epoxy circuit board, or flexible circuit boards that are able to bend, or the like, may be used as the circuit board 7.

    [0029] The circuit board 7 has an isolation portion 7a, a conductive pattern 7b formed on an upper surface of the isolation portion 7a, and a heat radiating portion 7c made of metal material laminated to a lower surface side of the isolation portion 7a. Electrode portions 7d that are connected to the conductive pattern 7b are formed spaced apart to the left and right on the rear end portion of the circuit board 7. The heat radiating portion 7c may be made of resin material having high thermal conductivity.

    [0030] A light source 8 is mounted in a position on the front end side on the upper surface of the circuit board 7. A light emitting diode (LED), for example, is used as the light source 8. A drive current is supplied to the light source 8 from a power supply circuit, not shown, via the circuit board 7, and light is emitted from the light source 8 according to the supplied drive current. At this time, the circuit board 7 generates heat, but the generated heat is released from the heat radiating portion 7c, so that an increase in the temperature of the circuit board 7 and the light source 8 is suppressed.

    [0031] A reflector 9 is arranged in the lamp chamber 5. This reflector 9 is formed as a reflective surface 9a.

    [0032] Light emitted from the light source 8 is reflected by the reflective surface 9a of the reflector 9, passes through the cover 3, and is illuminated forward.

    [0033] The socket 6 is formed in a generally angular tube-shape that is L-shaped, and is connected to the lamp chamber 5 (see FIGS. 1 to 3). The socket 6 is formed of a generally angular tube-shaped first cylindrical portion 10 that extends vertically and is open downward, and a second cylindrical portion 11 that protrudes forward from a front surface of an upper half portion of the first cylindrical portion 10 and is open forward. A front end of the second cylindrical portion 11 is connected to the lamp body 2.

    [0034] A horizontally long circuit board insertion hole 10a is formed in a front surface portion of the first cylindrical portion 10. This circuit board insertion hole 10a communicates with the second cylindrical portion 11 (see FIG. 2). An engaging protruding portion 12 that protrudes forward and extends left and right is provided on an inner surface of a rear surface portion of the first cylindrical portion 10. An engaging surface 12a that faces upward and an inclined surface 12b inclined such that the higher the vertical position is, the more the inclined surface 12b jut out forward, are formed vertically separated from one another on the engaging protruding portion 12.

    [0035] A contact holder 13 is arranged on the upper half portion of the first cylindrical portion 10 of the socket 6. The contact holder 13 is made of nonconductive material such as resin, and includes a base surface portion 14 that faces in the front-rear direction, a first retaining portion 15 that protrudes forward from an upper end portion of the base surface portion 14, and a second retaining portion 16 that protrudes forward from a lower end portion of the base surface portion 14.

    [0036] Insertion holes 14a are formed spaced apart from each other to the left and right in the base surface portion 14.

    [0037] Insertion grooves 17 that are open forward and downward are formed spaced apart from each other to the left and right in the first retaining portion 15. Rear surfaces that form the insertion grooves 17 are formed as retaining portions 17a. Retaining protruding portions 18 that protrude downward are provided spaced apart from each other to the left and right on a lower surface side of the first retaining portion 15. A retaining groove 18a that opens inward and to the front and rear is formed in each of the retaining protruding portions 18 that are positioned on both the left and right sides. A retaining groove 18a that opens to the right or left and to the front and rear is formed in each of the retaining protruding portions 18 positioned in the center.

    [0038] A circuit board insertion groove 16a that opens forward is formed in the second retaining portion 16. The circuit board insertion groove 16a is open upward except for at both left and right end portions. Arranging recessed portions 16b that open to the rear and downward are formed spaced apart from each other to the left and right on the lower surface side of the second retaining portion 16.

    [0039] Contact members 19 are joined to the contact holder 13. The contact members 19 are formed of flat conductive material such as metal that has been processed into a predetermined shape.

    [0040] The contact members 19 each include a middle surface portion 20 that faces in the front and rear directions, an engaging surface portion 21 that protrudes forward from an upper end portion of the middle surface portion 20, a connecting surface portion 22 that protrudes forward from a lower end portion of the middle surface portion 20, a connecting terminal portion 23 that is connected to a front end portion of the engaging surface portion 21, and a plug connecting portion 24 that protrudes downward from a front end portion of the connecting surface portion 22. The longitudinal direction of the plug connecting portion 24 of this invention means the extending direction in which the plug connecting portion 24 extends from the base end portion, and is the direction in which a power supply plug 25 is attached and detached to and from the plug connecting portion 24 in this direction.

    [0041] Part of each middle surface portion 20 is cut and bent up to provide a first elastic engagement portion 20a that prevents relative movement of the corresponding contact member 19 with respect to the lamp body 2. The first elastic engagement portion 20a is inclined such that the lower the vertical position is, the more the first elastic engagement portion 20a juts out rearward.

    [0042] Also, part of each engaging surface portion 21 is cut and bent up to provide a second elastic engagement portion 21a that prevents relative movement of the corresponding contact member 19 with respect to the contact holder 13. The second elastic engagement portion 21a is inclined such that the more rearward the position in the front-rear direction is, the more the second elastic engagement portion 21a juts out upward. Retainable pieces 21b that protrude to the left and right are provided on the engaging surface portions 21.

    [0043] Each of the connecting terminal portions 23 includes a folded-back portion 23a that is bent downward with respect to the engaging surface portion 21, and is inclined such that the more rearward the position in the front-rear direction is, the more the folded-back portion 23a juts out downward, and a tip end portion 23b that is connected to a rear end of the folded-back portion 23a, and is inclined such that the more rearward the position in the front-rear direction is, the more the tip end portion 23b returns upward.

    [0044] A generally lower half portion of the plug connecting portion 24 is provided as an overlapped portion 24a that is folded back so as to be doubled.

    [0045] The contact members 19 are joined to the contact holder 13 by being inserted from the rear side-by-side. The contact members 19 are joined to the contact holder 13 by the second elastic engagement portions 21a and retainable pieces 21b of the engaging surface portion 21 being inserted into the insertion grooves 17 and the retaining grooves 18a, respectively, and the connecting surface portions 22 being inserted into the recessed portions 16b.

    [0046] When the contact members 19 are being joined to the contact holder 13, the second elastic engagement portions 21a slidingly contact the front end portions of the lower surface of the first retaining portions 15 and elastically deform. Once past the front end portions, the second elastic engagement portions 21a then elastically return to their original shapes and become inserted in the insertion grooves 17.

    [0047] When the contact members 19 have been joined to the contact holder 13, the second elastic engagement portions 21a are engaged with (i.e., retained by) the retaining portions 17a of the insertion grooves 17, the retainable pieces 21b are engaged with the retaining grooves 18a, and the connecting surface portions 22 are engaged with the recessed portions 16b. At this time, the overlapped portions 24a of the plug connecting portions 24 are positioned lower than the lower surface of the contact holder 13.

    [0048] As described above, the contact members 19 are prevented from falling out of the contact holder 13 by the second elastic engagement portion 21a being engaged with (i.e., retained by) the retaining portions 17a of the insertion grooves 17.

    [0049] The contact members 19 that are joined to the contact holder 13 are inserted from below into the socket 6 together with the contact holder 13. When the contact members 19 are being inserted into the socket 6 together with the contact holder 13, the first elastic engagement portions 20a slidingly contact the inclined surface 12b of the engaging protruding portion 12 and elastically deform. Once past the engaging protruding portion 12, the first elastic engagement portions 20a then elastically return to their original shapes and become engaged with the engaging surface 12a.

    [0050] As described above, the contact members 19 and the contact holder 13 are prevented from falling out of the socket 6 by the first elastic engagement portions 20a being engaged with the engaging surface 12a of the engaging protruding portion 12. As a result, the contact members 19 and the contact holder 13 are retained inside the socket 6. Accordingly, in this embodiment, the engaging protruding portion 12 and the first elastic engagement portions 20a serve as an engaging portion of the invention.

    [0051] When the contact holder 13 is retained inside the socket 6, the front surface of both the first retaining portion 15 and the second retaining portion 16 is pressed against the front surface portion of the socket 6.

    [0052] As described above, when the contact members 19 and the contact holder 13 are retained inside the socket 6, one end portion (a rear end portion) of the circuit board 7 is inserted from the front into the circuit board insertion hole 10a, and inserted between the connecting terminal portions 23 of the contact members 19 and the second retaining portion 16 of the contact holder 13. The connecting terminal portions 23 are pressed due to elasticity against the electrode portions 7d of the circuit board 7, and the heat radiating portion 7c of the circuit board 7 is pressed against the second retaining portion 16.

    [0053] Therefore, the circuit board 7 is pressed by the restoring force of the elastically deformed, connecting terminal portions 23 so as to be held by the contact members 19.

    [0054] The power supply plug 25 that is connected to the power supply circuit is inserted into the socket 6, and the power supply plug 25 is connected to the plug connecting portions 24 of the contact members 19. Therefore, the drive current is supplied to the light source 8 from the power supply circuit via the power supply plug 25, the contact members 19, and the circuit board 7.

    [0055] As described above, the contact members 19 are joined to the contact holder 13 and arranged inside the socket 6, so that by designing the shape and size of the contact holder 13 according to the shape and size of the contact members 19, the contact members 19 will become able to be retained in the socket 6 regardless of their shape and size.

    [0056] Accordingly, the degree of freedom in the design of the contact members 19 is improved by using the contact holder 13.

    [0057] In addition, the retaining portions 17a are formed on the contact holder 13, and the contact members 19 are joined to the contact holder 13 by the second elastic engagement portions 21a being engaged with the retaining portions 17a.

    [0058] Therefore, the contact members 19 are easily and reliably joined to the contact holder 13, and a stable joined state of the contact members 19 with respect to the contact holder 13 is ensured.

    [0059] Furthermore, the engaging protruding portion 12 that has the engaging surface 12a is provided on the socket 6, and the contact members 19 and the contact holder 13 are retained inside the socket 6 by the first elastic engagement portions 20a being engaged with this engaging surface 12a, so that the contact members 19 and the contact holder 13 are easily and reliably held in the socket 6.

    [0060] Next, a modification of the socket and the contact members will be described (see FIGS. 5 and 6). A socket 6A according to the modification is connected to the rear surface portion 2a of the lamp body 2. The socket 6A may be formed by a member separate from the lamp body 2, or it may be formed integrally with the lamp body 2. Forming the socket 6A integrally with the lamp body 2 reduces the manufacturing cost owing to the decrease in the number of parts.

    [0061] Insertion holes 2b are formed spaced apart from each other to the left and right in a rear surface portion of the lamp body 2 to which the socket 6A is connected.

    [0062] The socket 6A is formed by a generally angular tube-shaped first cylindrical portion 10A that protrudes forward from the rear surface portion 2a, and a generally angular tube-shaped second cylindrical portion 11A that protrudes rearward from the rear surface portion 2a. The first cylindrical portion 10A and the second cylindrical portion 11A communicate with each other by the insertion holes 2b of the lamp body 2.

    [0063] A horizontally long circuit board insertion hole 10b that is open to the front is formed in the first cylindrical portion 10A. Member arranging holes 10c that are open to the front are formed spaced apart from each other to the left and right in the first cylindrical portion 10A. The member arranging holes 10c are positioned intersecting the circuit board insertion hole 10b and part of these member arranging holes 10c are common with the circuit board insertion hole 10b.

    [0064] Front insertion grooves 10d that open downward and forward and extend in the front-rear direction are formed spaced apart from each other to the right and left in an upper surface portion of the first cylindrical portion 10A. Rear insertion grooves 10e that are to the rear of the front insertion grooves 10d and separated from the front insertion grooves 10d, and that open downward and extend in the front-rear direction, are formed in the upper surface portion of the first cylindrical portion 10A. The front insertion grooves 10d and the rear insertion grooves 10e communicate with the member arranging holes 10c.

    [0065] Engaging protrusions 26 are provided between the front insertion grooves 10d and the rear insertion grooves 10e, on the upper surface portion of the first cylindrical portion 10A. Each of the engaging protrusions 26 includes an engaging surface 26a that faces rearward, and an inclined surface 26b that is positioned forward of the engaging surface 26a and is inclined such that the more rearward the position in the front-rear direction is, the more the inclined surface 26b juts out downward.

    [0066] Retaining protruding portions 27 that protrude forward are provided spaced apart from each other to the left and right on the first cylindrical portion 10A. These retaining protruding portions 27 are provided in positions toward the lower end side of the member arranging holes 10c. The lateral width of the retaining protruding portions 27 is smaller than the width in the left-right direction of the member arranging holes 10c.

    [0067] Contact members 19A according to this modification are formed by flat conductive material such as metal that has been processed into a predetermined shape.

    [0068] Each of the contact members 19A includes side surface portions 20A that face in the left-right direction and are positioned spaced apart from each other to the left and right, an engaging surface portion 21A provided so as to connect upper end portions of the side surface portions 20A together, a connecting surface portion 22A provided so as to connect lower end portions of the side surface portions 20A together, a connecting terminal portion 23 that is connected to a front end portion of the engaging surface portion 21A, and a plug connecting portion 24 that protrudes to the rear from an upper end portion of the engaging surface portion 21A.

    [0069] Insertion cutouts 20b that open to the front are formed in the side surface portions 20A.

    [0070] Part of the engaging surface portion 21A is cut and bent up to provide an first elastic engagement portion 21c. The first elastic engagement portion 21c is inclined such that the more forward the position in the front-rear direction is, the more the first elastic engagement portion 21c juts out upward.

    [0071] The contact members 19A are inserted side-by-side from the front into the member arranging holes 10c of the socket 6A. When inserting the contact members 19A into the socket 6A, the first elastic engagement portions 21c are inserted into the front insertion grooves 10d, and the retaining protruding portions 27 are inserted between the side surface portions 20A.

    [0072] When the first elastic engagement portions 21c are being inserted into the front insertion grooves 10d, the first elastic engagement portions 21c slidingly contact the inclined surfaces 26b of the engaging protrusions 26 and elastically deform. Once past the engaging protrusions 26, the first elastic engagement portions 21c then elastically return to their original shapes, and are inserted into the rear insertion grooves 10e and become engaged with the engaging surface 26a.

    [0073] As described above, the contact members 19A are prevented from falling out of the socket 6A by the first elastic engagement portions 21c being engaged with the engaging surfaces 26a of the engaging protrusions 26. As a result, the contact members 19A are retained inside the socket 6A. Accordingly, in this modification, the engaging protrusions 26 and the first elastic engagement portions 21c serve as an engaging portion of the invention.

    [0074] When the contact members 19A are retained inside the socket 6A, the connecting surface portions 22A are inserted below the retaining protruding portions 27, and the plug connecting portions 24 are inserted into the insertion holes 2b and positioned inside the second cylindrical portion 11A.

    [0075] When the contact members 19A are retained inside the socket 6A, one end portion (a rear end portion) of the circuit board 7 is inserted from the front into the circuit board insertion hole 10b, and inserted between the connecting terminal portions 23 of the contact members 19A and the retaining protruding portions 27 of the socket 6A. The rear end portion of the circuit board 7 is inserted into the insertion cutouts 20b of the contact members 19A, and the rear end surface is made to contact the side surface portions 20A. The connecting terminal portions 23 are pressed against the electrode portions 7d due to elasticity, and the heat radiating portion 7c is pressed against the retaining protruding portions 27.

    [0076] Therefore, the circuit board 7 is pressed by the restoring force of the elastically deformed, connecting terminal portions 23 so as to be held by the contact members 19A.

    [0077] The power supply plug 25 is inserted into the second cylindrical portion 11A of the socket 6A, and the power supply plug 25 is connected to the plug connecting portions 24 of the contact members 19A. Therefore, the drive current is supplied to the light source 8 from the power supply circuit via the power supply plug 25, the contact members 19A, and the circuit board 7.

    [0078] As described above, the contact members 19A are retained in the socket 6A without using a contact holder, so that the manufacturing cost of the vehicular lamp 1 is reduced, by the amount of the contact holder, owing to the decrease in the number of parts.

    [0079] Furthermore, the engaging protrusions 26 that have the engaging surfaces 26a are provided on the socket 6A, and the contact members 19A are retained inside the socket 6A by the first elastic engagement portions 21c being engaged with these engaging surfaces 26a, so that the contact members 19A are easily and reliably held in the socket 6A.

    [0080] As described above, in this vehicular lamp 1, the circuit board 7 is held by the contact members 19 or the contact members 19A due to the elasticity of the connecting terminal portions 23 provided on the contact members 19 or the contact members 19A.

    [0081] Therefore, a harness for supplying drive current to the light source 8 is not necessary, so that neither the work of connecting a harness to the circuit board by soldering nor the work of pulling the harness around inside and outside of the lamp body is needed. Hence, workability related to the assembly of the circuit board 7 and the like is improved.

    [0082] Also, it is possible to connect the circuit board 7 and the contact members 19 and 19A by only the work of inserting the circuit board 7 into the socket 6 and 6A, so that the manufacturing cost of the vehicular lamp 1 is reduced due to the improvement of workability related to the connecting work.

    [0083] Furthermore, the heat radiating portion 7c of the circuit board 7 is pressed against a nonconductive portion, i.e., the second retaining portion 16 of the contact holder 13 or the retaining protruding portions 27 of the socket 6A, due to the elasticity of the connecting terminal portions 23, so that a short in the circuit board 7 is inhibited.

    [0084] The heat radiating portion 7c may also be provided on at least a portion of the circuit board 7, the portion including an end portion on the side that is inserted into the socket 6 and 6A.

    [0085] The shapes and structures of the portions illustrated in the embodiments described above represent only specific examples used in the implementation of the invention. The technical scope of the invention shall not be construed as being limited to these embodiments.


    Claims

    1. A vehicular lamp comprising:

    a light source (8) that emits light;

    a lamp body (2), inside of which the light source (8) is arranged;

    a circuit board (7) that has a conductive pattern (7b) that functions as an electrically-conducting path of drive current to be supplied to the light source (8), and on one end portion of which an electrode portion (7d) connected to the conductive pattern (7b) is formed;

    a socket (6; 6A) connected to the lamp body (2); and

    a contact member (19; 19A) that is arranged in the socket (6; 6A) and has an elastically deformable connecting terminal portion (23) connected to the electrode portion (7d) of the circuit board (7), and a plug connecting portion (24), to which a power supply plug is connected,

    wherein the circuit board (7) is pressed by restoring force of the connecting terminal portion (23), elastically deformed, so as to be held by the contact member (19; 19A), wherein the vehicular lamp comprises further an engaging portion (12, 20a; 26, 21c) that prevents relative movement of the contact member (19; 19A) with respect to the lamp body (2) in a longitudinal direction of the plug connecting portion (24),

    wherein the engaging portion (12, 20a; 26, 21c) is configured not to prevent the relative movement of the contact member (19; 19A) to a fixation position, at which the contact member (19; 19A) is fixed, during assembly of the contact member (19; 19A) and configured to prevent the relative movement of the contact member (19; 19A) from the fixation position,
    characterized in that
    the engaging portion (12, 20a; 26, 21c) includes:

    an engaging protrusion (12; 26) that is provided on the lamp body (2), and has an engaging surface (12a; 26a) that faces in a direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body (2); and

    a first elastic engagement portion (20a; 21c) that is provided on the contact member (19; 19A), that is inclined such that an amount of jutting-out of the first elastic engagement portion (20a; 21c) from the contact member (19; 19A) increases in a direction opposite the direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body (2), and that is formed by cutting and bending up a portion of the contact member (19; 19A).


     
    2. The vehicular lamp according to claim 1, wherein
    the engaging protrusion (12; 26) has an inclined surface (12b; 26b) that is inclined such that an amount of jutting-out of the engaging protrusion (12; 26) from the lamp body (2) increases in the direction of the relative movement, during assembly, of the contact member (19; 19A) with respect to the lamp body (2).
     
    3. The vehicular lamp according to any one of claims 1 to 2, further comprising
    a contact holder (13) that is made of nonconductive material and is retained in the socket (6), wherein
    the contact member (19) is joined to the contact holder (13) and arranged inside the socket (6).
     
    4. The vehicular lamp according to claim 3, wherein
    a retaining portion (17a) is formed on the contact holder (13);
    an elastically deformable second elastic engagement portion (21a) is provided on the contact member (19); and
    the second elastic engagement portion (21a) is engaged with the retaining portion (17a) to join the contact member (19) to the contact holder (13).
     
    5. The vehicular lamp according to claim 4, wherein
    the retaining portion (17a) is provided on the contact holder (13), and has a surface that faces in a direction of movement, during assembly, of the contact member (19) relative to the contact holder (13), and
    the second elastic engagement portion (21a) is provided on the contact member (19), is inclined such that an amount of jutting-out of the second elastic engagement portion (21a) from the contact member (19) increases in a direction opposite the direction of the movement, during assembly, of the contact member (19) relative to the contact holder (13), and is formed by cutting and bending up a portion of the contact member (19).
     
    6. The vehicular lamp according to any one of claims 1 to 5, further comprising:

    an isolation portion (7a) that is provided on at least the one end portion of the circuit board (7), and on one surface of which the electrode portion (7d) is formed; and

    a heat radiating portion (7c) that is provided on at least the one end portion of the circuit board (7), that contacts the other surface of the isolation portion (7a), and that is made of metallic material,

    wherein the heat radiating portion (7c) is pressed against a nonconductive portion by the restoring force of the connecting terminal portion (23) elastically deformed.


     
    7. The vehicular lamp according to any one of claims 1 to 6, wherein
    the socket (6; 6A) is integrally formed with the lamp body (2).
     


    Ansprüche

    1. Fahrzeugleuchte (10), die umfasst:

    eine Lichtquelle (8), die Licht emittiert;

    ein Leuchtengehäuse (2), in dessen Innenraum die Lichtquelle (8) angeordnet ist;

    eine Leiterplatte (7), die ein Leitermuster (7b) aufweist, das als ein elektrisch leitender Weg für Ansteuerungsstrom dient, der der Lichtquelle (8) zuzuführen ist, und an deren einem Endabschnitt ein Elektrodenabschnitt (7d) ausgebildet ist, der mit dem Leitermuster (7b) verbunden ist;

    eine Buchse (6; 6A), die mit dem Leuchtengehäuse (2) verbunden ist; sowie

    ein Kontaktelement (19; 19A), das in der Buchse (6; 6A) angeordnet ist und einen elastisch verformbaren verbindenden Anschlussabschnitt (23), der mit dem Elektrodenabschnitt (7d) der Leiterplatte (7) verbunden ist, sowie einen Stecker-Verbindungsabschnitt (24) aufweist, mit dem ein Stromversorgungs-Stecker verbunden ist,

    wobei die Leiterplatte (7) durch Rückstellkraft des elastisch verformten verbindenden Anschlussabschnitts (23) so gedrückt wird, dass sie durch das Kontaktelement (19; 19A) gehalten wird, und

    die Fahrzeugleuchte des Weiteren einen Eingriffsabschnitt (12, 20a; 26, 21c) umfasst, der relative Bewegung des Kontaktelementes (19; 19A) in Bezug auf das Leuchtengehäuse (2) in einer Längsrichtung des Stecker-Verbindungsabschnitts (24) verhindert,
    und der Eingriffsabschnitt (12, 20a; 26, 21c) so ausgeführt ist, dass er die relative Bewegung des Kontaktelementes (19; 19A) an eine Fixier-Position, an der das Kontaktelement (19; 19A) fixiert ist, bei Montage des Kontaktelementes (19; 19A) nicht verhindert, und so ausgeführt ist, dass er die relative Bewegung des Kontaktelementes (19; 19A) aus der Fixier-Position verhindert,
    dadurch gekennzeichnet, dass
    der Eingriffsabschnitt (12, 20a; 26, 21c) enthält:

    einen Eingriffsvorsprung (12; 26), der sich an dem Leuchtengehäuse (2) befindet und eine Eingriffsfläche (12a; 26a) aufweist, die in einer Richtung der relativen Bewegung des Kontaktelementes (19; 19A) in Bezug auf das Leuchtengehäuse (2) bei Montage gewandt ist; sowie

    einen ersten elastischen Eingriffsabschnitt (20a; 21c), der sich an dem Kontaktelement (19; 19A) befindet, der so geneigt ist, dass ein Maß, um das der erste elastische Eingriffsabschnitt (20a; 21c) von dem Kontaktelement (19; 19A) vorspringt, in einer Richtung entgegengesetzt zu der Richtung der relativen Bewegung des Kontaktelementes (19; 19A) in Bezug auf das Leuchtengehäuse (2) bei Montage zunimmt, und der ausgebildet wird, indem ein Abschnitt des Kontaktelementes (19; 19A) eingeschnitten und nach oben gebogen wird.


     
    2. Fahrzeugleuchte nach Anspruch 1, wobei
    der Eingriffsvorsprung (12; 26) eine geneigte Fläche (12b; 26b) aufweist, die so geneigt ist, dass ein Maß, um das der Eingriffsvorsprung (12; 26) von dem Leuchtengehäuse (2) vorspringt, in der Richtung der relativen Bewegung des Kontaktelementes (19; 19A) in Bezug auf das Leuchtengehäuse (2) bei Montage zunimmt.
     
    3. Fahrzeugleuchte nach einem der Ansprüche 1 bis 2, die des Weiteren umfasst:

    einen Kontakt-Halter (13), der aus nichtleitendem Material besteht und in der Buchse (6) gehalten wird, wobei

    das Kontaktelement (19) mit dem Kontakt-Halter (13) verbunden und im Inneren der Buchse (6) angeordnet ist.


     
    4. Fahrzeugleuchte nach Anspruch 3, wobei
    ein Halteabschnitt (17a) an dem Kontakt-Halter (13) ausgebildet ist;
    ein elastisch verformbarer zweiter elastischer Eingriffsabschnitt (21a) sich an dem Kontaktelement (19) befindet; und
    der zweite elastische Eingriffsabschnitt (21a) mit dem Halteabschnitt (17a) in Eingriff kommt, um das Kontaktelement (19) mit dem Kontakt-Halter (13) zu verbinden.
     
    5. Fahrzeugleuchte nach Anspruch 4, wobei
    der Halteabschnitt (17a) sich an dem Kontakt-Halter (13) befindet und eine Fläche aufweist, die in einer Richtung von Bewegung des Kontaktelementes (19) relativ zu dem Kontakt-Halter (13) bei Montage gewandt ist; und
    der zweite elastische Eingriffsabschnitt (21a) sich an dem Kontaktelement (19) befindet, so geneigt ist, dass ein Maß, um das der zweite elastische Eingriffsabschnitt (21a) von dem Kontaktelement (19) vorspringt, in einer Richtung entgegengesetzt zu der Richtung der Bewegung des Kontaktelementes (19) relativ zu dem Kontakt-Halter (13) bei Montage zunimmt, und er ausgebildet wird, indem ein Abschnitt des Kontaktelementes (19) eingeschnitten und nach oben gebogen wird.
     
    6. Fahrzeugleuchte nach einem der Ansprüche 1 bis 5, die des Weiteren umfasst:

    einen Isolierabschnitt (7a), der sich an wenigstens dem einen Endabschnitt der Leiterplatte (7) und an einer Fläche befindet, an der der Elektrodenabschnitt (7d) ausgebildet ist; sowie

    einen wärmeabstrahlenden Abschnitt (7c), der sich an wenigstens dem einen Endabschnitt der Leiterplatte (7) befindet, der mit der anderen Fläche des Isolierabschnitts (7a) in Kontakt ist und der aus Metallmaterial besteht,

    wobei der wärmeabstrahlende Abschnitt (7c) durch die Rückstellkraft des elastisch verformten verbindenden Anschlussabschnitts (23) an einen nichtleitenden Abschnitt gedrückt wird.


     
    7. Fahrzeugleuchte nach einem der Ansprüche 1 bis 6, wobei
    die Buchse (6; 6A) integral mit dem Leuchtengehäuse (2) ausgebildet ist.
     


    Revendications

    1. Lampe véhiculaire comprenant :

    une source de lumière (8) qui émet une lumière ;

    un corps de lampe (2), à l'intérieur duquel est disposée la source de lumière (8) ;

    une carte de circuit imprimé (7) qui possède un motif conducteur (7b) qui fonctionne en tant que chemin conducteur d'un courant d'entraînement devant être fourni à la source de lumière (8), et sur laquelle une partie d'électrode (7d) reliée au motif conducteur (7b) est formée sur une de ses parties d'extrémité ;

    une douille (6 ; 6A) reliée au corps de lampe (2) ; et

    un élément de contact (19 ; 19A) qui est disposé dans la douille (6 ; 6A) et qui a une partie de borne de connexion déformable de manière élastique (23) reliée à la partie d'électrode (7d) du circuit imprimé (7) et une partie de connexion de prise (24) à laquelle est connectée une prise d'alimentation électrique,

    dans laquelle le circuit imprimé (7) est pressé par une force de restauration de la partie de borne de connexion (23), déformée de manière élastique, de façon à être retenue par l'élément de contact (19 ; 19A), dans laquelle la lampe véhiculaire comprend en outre une partie venant en prise (12, 20a ; 26, 21c) qui empêche un déplacement relatif de l'élément de contact (19 ; 19A) par rapport au corps de lampe (2) suivant une direction longitudinale de la partie de connexion de prise (24),

    dans laquelle la partie venant en prise (12, 20a ; 26, 21c) est configurée pour ne pas empêcher le déplacement relatif de l'élément de contact (19 ; 19A) à une position de fixation, à laquelle l'élément de contact (19 ; 19A) est fixé, pendant le montage de l'élément de contact (19 ; 19A) et configurée pour empêcher le déplacement relatif de l'élément de contact (19 ; 19A) à partir de la position de fixation,

    caractérisée en ce que

    la partie venant en prise (12, 20a ; 26, 21c) comprend :

    une saillie venant en prise (12 ; 26) qui est fournie sur le corps de lampe (2), et qui a une surface venant en prise (12a ; 26a) qui fait face suivant une direction du déplacement relatif, pendant le montage, de l'élément de contact (19 ; 19A) par rapport au corps de lampe (2) ; et

    une première partie de mise en prise élastique (20a ; 21c) qui est fournie sur l'élément de contact (19 ; 19A), qui est inclinée de telle sorte qu'une quantité de jaillissement de la première partie de mise en prise élastique (20a ; 21c) à partir de l'élément de contact (19 ; 19A) augmente suivant une direction opposée à la direction du déplacement relatif, pendant le montage, de l'élément de contact (19 ; 19A) par rapport au corps de lampe (2) et qui est formée en coupant et en pliant une partie de l'élément de contact (19 ; 19A).


     
    2. Lampe véhiculaire selon la revendication 1, dans laquelle
    la saillie venant en prise (12 ; 26) a une surface inclinée (12b ; 26b) qui est inclinée de telle sorte qu'une quantité de jaillissement de la partie venant en prise élastique (12 ; 26) à partir du corps de lampe (2) augmente suivant la direction du déplacement relatif, pendant le montage, de l'élément de contact (19 ; 19A) par rapport au corps de lampe (2)
     
    3. Lampe véhiculaire selon l'une quelconque des revendications 1 à 2, comprenant en outre
    un support de contact (13) qui est réalisé à partir d'un matériau non conducteur et est retenu dans la douille (6), dans laquelle
    l'élément de contact (19) est joint au support de contact (13) et disposé à l'intérieur de la douille (6).
     
    4. Lampe véhiculaire selon la revendication 3, dans laquelle
    une partie de retenue (17a) est formée sur le support de contact (13) ;
    une seconde partie de mise en prise élastique déformable de manière élastique (21a) est fournie sur l'élément de contact (19) ; et
    la seconde partie de mise en prise élastique (21a) est amenée en prise avec la partie de retenue (17a) pour joindre l'élément de contact (19) au support de contact (13).
     
    5. Lampe véhiculaire selon la revendication 4, dans laquelle
    la partie de retenue (17a) est fournie sur le support de contact (13) et a une surface qui fait face suivant une direction de déplacement, pendant le montage, de l'élément de contact (19) par rapport au support de contact (13), et
    la seconde partie de mise en prise élastique (21a) est fournie sur l'élément de contact (19), est inclinée de telle sorte qu'une quantité de jaillissement de la seconde partie de mise en prise élastique (21a) à partir de l'élément de contact (19) augmente suivant une direction opposée à la direction de déplacement, pendant le montage, de l'élément de contact (19) par rapport au support de contact (13) et est formée en coupant et en pliant une partie de l'élément de contact (19).
     
    6. Lampe véhiculaire selon l'une quelconque des revendications 1 à 5, comprenant en outre :

    une partie d'isolation (7a) qui est fournie sur au moins la ou les parties d'extrémité du circuit imprimé (7) et sur une surface sur laquelle est formée la partie d'électrode (7d) ; et

    une partie de rayonnement thermique (7c) qui est fournie sur au moins la ou les parties d'extrémité du circuit imprimé (7) qui entre en contact avec l'autre surface de la partie d'isolation (7a) et qui est fabriquée à partir d'un matériau métallique,

    dans laquelle la partie de rayonnement thermique (7c) est pressée contre une partie non conductrice par la force de restauration de la partie de borne de connexion (23) déformée de manière élastique.


     
    7. Lampe véhiculaire selon l'une quelconque des revendications 1 '6, dans laquelle
    la douille (6 ; 6A) est formée d'un seul tenant avec le corps de lampe (2).
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description