JP5511344B2 - Light source unit - Google Patents

Description

The present invention relates to a light source unit. More specifically, the present invention relates to a technical field in which maintenance is improved and assembly is improved by sliding a light emitter having a light emitting diode provided as a light source on a mounting base.

  There is a light source unit that uses a light emitting diode (LED) as a light source, and such a light source unit is provided in, for example, a vehicle lamp that emits light emitted from a light source as illumination light (for example, , See Patent Document 1).

  The light source unit described in Patent Document 1 is configured such that a circuit board, a connector, and the like are integrally provided in a housing, and a light emitting diode and the like are joined to the circuit board.

JP 2006-331967 A

  However, in the light source unit described in Patent Document 1, since the circuit board is integrally provided in the housing and the light emitting diode or the like is joined to the circuit board, the circuit board or When the light emitting diode or the like needs to be replaced, the part including the housing must be removed or replaced, which causes a problem that the maintainability is poor.

  Further, it is necessary to improve the assembly of the light source unit in order to reduce the manufacturing cost.

Accordingly, the present invention the light source unit, it is an object to improve and increase the assemblability of the maintenance.

Light source unit, in order to solve the above problems, a light emitting body having a flexible printed wiring board in which a pair of power feeding portion is provided to power the light emitting diode and light emitting diode provided as the light source, the luminous body And an attachment base fixed in a replaceable manner, and the attachment base is attached to the attachment hole of the vehicular lamp from behind .

Therefore, in the light source unit, the mounting base is attached from the rear into the mounting hole of the vehicle lamp.

The light source unit of the present invention includes a light emitting body having a light emitting diode provided as a light source and a flexible printed wiring board provided with a pair of power feeding portions for supplying power to the light emitting diode, and an attachment in which the light emitting body is fixed in a replaceable manner. A mounting base, wherein the mounting base is attached to the mounting hole of the vehicular lamp from behind .

  Therefore, since the assembly is easy, the assemblability can be improved, and the light emitter can be replaced with respect to the mounting base, so that the maintainability can be improved.

In the invention described in claim 2, the flexible printed wiring board includes a light source connection portion and a circuit formation portion, and a connection portion that connects both, and a light emitting diode is mounted on the light source connection portion, and the circuit formation An electronic component for controlling the light emitting state of the light emitting diode is mounted on the portion .

Therefore, since the light source connecting portion and the circuit forming portion are connected by the connecting portion, it is possible to further improve the maintainability and the assemblability.

In the invention described in claim 3, a heat dissipating member that releases heat generated when the light emitting diode emits light is disposed on one surface of the flexible printed wiring board .

Therefore, since the heat radiating member is attached to one surface of the flexible printed wiring board, it is possible to further improve the maintainability and the assemblability.

  In the invention described in claim 4, since the connection portions connected to the pair of power feeding portions of the light emitter are provided, and the connection portions are integrally formed on the mounting base, manufacturing by reducing the number of parts Cost can be reduced.

Another light source unit of the present invention includes a light emitter having a light emitting diode provided as a light source and a substrate provided with a pair of power feeding portions for supplying power to the light emitting diode, and an attachment in which the light emitter is fixed in a replaceable manner. The mounting base is attached to the mounting hole of the vehicular lamp from the rear, and the mounting base is attached with a lens body for controlling light emitted from a light emitting diode as a light source. Features.

  Therefore, since the assembly is easy, the assemblability can be improved, and the light emitter can be replaced with respect to the mounting base, so that the maintainability can be improved.

It will be described below with reference to the accompanying drawings best mode for carrying out the present invention the light source unit.

  The vehicular lamp 1 includes, for example, a lamp body (not shown) having a recess opened forward and a cover (not shown) that closes the opening surface of the lamp body, and the reflector 2 is formed in a space formed by the lamp body and the cover. Is arranged (see FIG. 1). A mounting hole 2 a penetrating in the front-rear direction is formed at the rear end of the reflector 2.

  A light source unit 3 is attached to the rear end of the reflector 2.

  The light source unit 3 in the first embodiment will be described below (see FIGS. 1 to 4).

  The light source unit 3 includes an attachment base 4 and a unit base 5 that is inserted into the attachment base 4 and attached (see FIGS. 1 to 3).

  The mounting base 4 is formed of, for example, an insulating material and has a base plate portion 6 that faces in the front-rear direction. The base plate portion 6 is a straight line that connects the U-shaped portion of the outer peripheral edge and both ends of the U-shaped portion. It is formed by the shape part.

  The mounting base 4 includes a base plate portion 6, a front peripheral surface portion 7 protruding forward from an outer peripheral portion excluding the upper edge of the base plate portion 6, and a front side wall projecting inward from the front edge of the front peripheral surface portion 7. A rear peripheral surface portion 9 projecting rearward from the outer peripheral portion excluding the linear portion of the portion 8 and the base plate portion 6, and a rear side wall portion 10 projecting inward from the rear edge of the rear peripheral surface portion 9. Consists of.

  A space on the front side of the base plate portion 6 in the mounting base 4 is formed as an insertion space 4a, an opening on the upper side of the insertion space 4a is an insertion port 4b, and a space on the inner side of the front side wall portion 8 is a front arrangement portion 4c. And communicated with the insertion space 4a.

  A space on the rear side of the base plate portion 6 in the mounting base 4 is formed as an arrangement space 4d, an opening on the upper side of the arrangement space 4d is an insertion opening 4e, and a space on the inner side of the rear side wall portion 10 is on the rear side. The placement unit 4f communicates with the placement space 4d.

  The mounting base 4 is provided with mounting projections 11 and 11 projecting outward from the rear peripheral surface portion 9, and screw insertion holes 11 a and 11 a are formed in the mounting projections 11 and 11, respectively. .

  The unit base 5 includes a first heat radiating member 12 facing in the front-rear direction formed of a metal material, a second heat radiating member 13 facing in the front-rear direction formed of a metal material, the first heat radiating member 12 and the second heat radiating member 12. And a flexible printed wiring board 14 mounted across the heat radiation member 13.

  The first heat radiating member 12 and the second heat radiating member 13 are each formed in a substantially disc shape, and have notches 12a and 13a opened upward at their upper ends.

  The flexible printed wiring board 14 includes a light source connecting portion 15, a circuit forming portion 16, and a connecting portion 17 that connects the two.

  A light emitting diode 18 is mounted on the light source connection portion 15 and functions as a substrate on which the light emitting diode 18 is mounted. The number of the light emitting diodes 18 is arbitrary, and a plurality of the light emitting diodes 18 can be mounted according to the required light emission luminance.

  A diode (not shown) such as a protective element or a resistance element and a connection connector 19 are mounted on the circuit forming unit 16, and the circuit forming unit 16 functions as a circuit board that controls the light emitting state of the light emitting diode 18.

  The flexible printed wiring board 14 is formed with circuit patterns 14a, 14a,... Connected to a light emitting diode 18, a diode such as a protective element or a resistance element, and a connection connector 19, respectively.

  Of the circuit patterns 14a, 14a,..., A portion connected to the light emitting diode 18 functions as a power feeding unit for feeding power to the light emitting diode 18. Further, the light emitter 20 is configured by the light source connection portion 15 and the light emitting diode 18 mounted on the light source connection portion 15.

  The flexible printed wiring board 14 has a light source connecting portion 15 attached to a portion excluding the outer peripheral portion on one surface of the first heat radiating member 12, and the circuit forming portion 16 is at least an outer peripheral portion on one surface of the second heat radiating member 13. It is attached to the part except.

  In the unit base 5, the connecting portion 17 of the flexible printed wiring board 14 is bent so that the other surface of the first heat radiating member 12 faces the other surface of the second heat radiating member 13. Is inserted into the notch 12 a of the first heat radiating member 12 and the notch 13 a of the second heat radiating member 13. Thus, since the notch parts 12a and 13a are formed in the 1st heat radiating member 12 and the 2nd heat radiating member 13, respectively, the position and bending state of the connection part 17 of the flexible printed wiring board 14 are stabilized, and a connection part 17 can be shortened.

  As described above, the first heat radiating member 12 and the light source connection portion 15 are attached to the mounting base 4 in a state where the other surface of the first heat radiating member 12 and the other surface of the second heat radiating member 13 face each other. The first heat radiating member 12 is fitted into the mounting base 4 and slid into the insertion space 4a from the insertion port 4b, and the second heat radiating member 13 and the circuit forming portion 16 are inserted into the insertion opening 4e of the mounting base 4. The second heat radiating member 13 is fitted into the mounting base 4 and inserted into the placement space 4d, and the unit base 5 is mounted on the mounting base 4 to constitute the light source unit 3.

  In a state in which the unit base 5 is attached to the attachment base 4 and the light source unit 3 is configured, the light source connection portion 15 of the flexible printed wiring board 14 is arranged in the front arrangement portion 4 c of the attachment base 4, and the rear of the attachment base 4. The circuit forming part 16 of the flexible printed wiring board 14 is arranged on the side arrangement part 4f, and the connection connector 19 protrudes rearward from the mounting base 4.

  The light source unit 3 is fixed to the reflector 2 by mounting screws 50 and 50 respectively inserted into screw insertion holes 11 a and 11 a formed in the mounting projections 11 and 11 of the mounting base 4.

  A connector 100 connected to a power supply circuit (not shown) is connected to the connection connector 19 of the light source unit 3 (see FIG. 1).

  As described above, the light source unit 3 is assembled by the unit base 5 being slid and inserted into the mounting base 4, so that the assembly is easy and the assemblability can be improved.

  In addition, the unit base 5 can be replaced with respect to the mounting base 4, and the unit base 5 can be easily replaced by sliding the mounting base 4 to improve the maintainability. Can do.

  In the state in which the light source unit 3 is configured as described above, a current is supplied from the power supply circuit to the light emitting diode 18 via the connector 100, the connection connector 19, and the circuit patterns 14a, 14a,. Then, light is emitted from the light emitting diode 18.

  When the light emitting diode 18 emits light, heat is generated in the light emitting diode 18 and the flexible printed wiring board 14 as the light is emitted, but the generated heat is released from the first heat radiating member 12 and the second heat radiating member 13 and is excellent in heat dissipation. Sex is secured.

  Although the example in which the light emitter 20 is provided as a part of the flexible printed wiring board 14 has been described above, for example, as in the light source unit 3A which is a modified example of the first embodiment described below, It is also possible to configure the light emitter separately from the flexible printed wiring board (see FIG. 4).

  The light source unit 3A includes an attachment base 4A, a unit base 5A that is inserted and attached to the attachment base 4A, and a light emitter 21 that is inserted and attached to the attachment base 4A and connected to the unit base 5A.

  The mounting base 4A is formed of, for example, an insulating material, and the first front peripheral surface portion 22 and the first front peripheral surface portion 22 projecting forward from the outer peripheral portion excluding the base plate portion 6 and the linear portion of the base plate portion 6. A first front side wall portion 23 projecting inward from the front edge of the front side peripheral surface portion 22, a second front side peripheral surface portion 24 projecting forward from the inner peripheral edge of the first front side wall portion 23, and The second front side wall portion 25, the rear side peripheral surface portion 9 and the rear side wall portion 10 projecting inward from the front edge of the second front side peripheral surface portion 24.

  Of the space on the front side of the base plate portion 6 of the mounting base 4A, the space on the inner surface side of the first front peripheral surface portion 22 is formed as the first insertion space 4g, and the upper opening of the first insertion space 4g. Is the first insertion port 4h, and the space on the inner surface side of the second front peripheral surface portion 24 in the space on the front side of the base plate portion 6 is formed as the second insertion space 4i. The upper opening of the space 4i is a second insertion port 4j. The space inside the second front side wall portion 25 is a front-side arrangement portion 4k and communicates with the second insertion space 4i.

  The unit base 5 </ b> A includes a first heat radiating member 12, a second heat radiating member 13, and a flexible printed wiring board 14 </ b> A attached across the first heat radiating member 12 and the second heat radiating member 13. Yes.

  The flexible printed wiring board 14A includes a light source connecting portion 15A, a circuit forming portion 16, and a connecting portion 17 that connects the two.

  Contact portions 15a and 15a are formed in the light source connection portion 15A.

  The flexible printed wiring board 14A is formed with contact portions 15a, 15a, diodes such as protective elements and resistance elements, and circuit patterns 14b, 14b,. The contact portions 15a and 15a are provided at one end portions of the circuit patterns 14b and 14b, respectively.

  In the flexible printed wiring board 14 </ b> A, the light source connection portion 15 </ b> A is attached to a portion excluding the outer peripheral portion on one surface of the first heat radiating member 12.

  In the unit base 5A, the connecting portion 17 of the flexible printed wiring board 14A is bent so that the other surface of the first heat radiating member 12 and the other surface of the second heat radiating member 13 face each other.

  The light emitter 21 includes a light emitting diode 18 and a disk-like substrate 26 on which the light emitting diode 18 is mounted. A pair of power feeding portions 26 a and 26 a is formed on the substrate 26, and one end of each of the power feeding portions 26 a and 26 a is connected to the light emitting diode 18 and the other end is positioned on the rear surface of the substrate 26.

  In the unit base 5A, the first heat radiating member 12 and the light source connecting portion 15A are inserted into the first insertion space 4h through the first insertion port 4g of the mounting base 4A and slid, so that the first heat radiating member 12 is attached to the mounting base 4A. The second heat radiating member 13 and the circuit forming portion 16 are inserted into the placement space 4d through the insertion opening 4e of the mounting base 4A and slid to fit the second heat radiating member 13 into the mounting base 4A. The unit base 5A is attached to the attachment base 4A.

  The light emitter 21 is inserted into the second insertion space 4j from the second insertion port 4i of the mounting base 4A and is slid and fitted into the mounting base 4A, and is mounted on the mounting base 4A to constitute the light source unit 3A. .

  In a state where the light emitter 21 is attached to the attachment base 4A, the power supply portions 26a and 26a formed on the substrate 26 of the light emitter 21 are contact portions 15a and 15a formed on the flexible printed wiring board 14A of the unit base 5A, respectively. Connected to.

  As described above, the light source unit 3A is assembled by sliding and inserting the unit base 5A and the light emitter 21 into the mounting base 4A. Therefore, the light source unit 3A is easy to assemble and can be improved in assembly. .

  In addition, the unit base 5A can be replaced with the mounting base 4A, and the unit base 5A can be easily replaced by sliding it with respect to the mounting base 4A, thereby improving maintainability. Can do.

  Further, in the light source unit 3A, the light emitter 21 can be exchanged with respect to the mounting base 4A, and the light emitter 21 can be easily exchanged by sliding it with respect to the attachment base 4A. Further improvement in maintainability can be achieved.

  Next, the light source unit 3B in 2nd Embodiment is demonstrated (refer FIG.5 and FIG.6).

  The light source unit 3B includes a mounting base 4B, a light emitting body 27, a heat radiating member 12B, and a connecting body 28 which are inserted into the mounting base 4B and mounted.

  The mounting base 4B is formed of, for example, an insulating material and has a box-shaped case portion 29 opened upward and a first front peripheral portion protruding forward from an outer peripheral portion excluding the upper edge of the front surface of the case portion 29. A first front side wall portion 23B projecting inward from the front edge of the surface portion 22B and the first front side peripheral surface portion 22B, and a second front side protruding from the inner peripheral edge of the first front side wall portion 23 The front peripheral surface portion 24B and the second front side wall portion 25B projecting inward from the front edge of the second front peripheral surface portion 24B.

  The case portion 29 is formed with heat radiation cutouts 29a and 29a that are opened upward on both side surface portions, and an insertion cutout 29b that is opened upward on the rear surface portion. Slits 29c and 29c opened upward are formed.

  Of the space on the front side of the case portion 29 in the mounting base 4B, the space on the inner surface side of the first front peripheral surface portion 22B is formed as the first insertion space 41, and the upper opening of the first insertion space 41 is formed. The first insertion port 4m is a space on the inner surface side of the second front peripheral surface portion 24B in the space on the front side of the case portion 29, which is formed as a second insertion space 4n, and the second insertion space 4n. The upper opening is a second insertion port 4o. The space inside the second front side wall portion 25B serves as a front side arrangement portion 4p and communicates with the second insertion space 4o.

  The mounting base 4B is provided with mounting projections 11 and 11 on both side surfaces of the case portion 29, respectively.

  The light emitter 27 includes a light emitting diode 18 and a substrate 30 on which the light emitting diode 18 is mounted. The substrate 30 is provided with a connection protrusion 30a protruding upward. A pair of power supply portions 30b and 30b is formed on the substrate 30, and one end of each of the power supply portions 30b and 30b is connected to the light emitting diode 18 and the other end is positioned on the connection protrusion 30a.

  The heat dissipation member 12B is formed in a rectangular shape.

  The connection body 28 includes a circuit board 31, a first conduction terminal portion 32 provided at the front end portion of the circuit board 31, and a second conduction terminal portion 33 provided at the rear end portion of the circuit board 31. A control circuit 31 a is formed on the circuit board 31, and the control circuit 31 a is connected to the first conduction terminal portion 32 and the second conduction terminal portion 33.

  The light emitter 27 and the heat radiating member 12B are inserted into the first insertion space 4m and the second insertion space 4o from the first insertion port 4l and the second insertion port 4n of the mounting base 4B, and are slid and mounted. 4B is fitted and attached. In a state where the light emitter 27 and the heat radiating member 12B are respectively attached to the attachment base 4B, the rear surface of the substrate 30 in the light emitter 27 is in contact with the heat radiating member 12B. In the light emitter 27, the connection protrusion 30a of the substrate 30 protrudes upward from the first insertion space 4m.

  In a state where the light emitter 27 and the heat dissipation member 12B are respectively attached to the attachment base 4B, the connection body 28 is attached to the attachment base 4B by an appropriate means such as adhesion. In the connection body 28, the first conduction terminal portion 32 is connected to the connection protrusion 30 a of the light emitter 27, and a part of the second conduction terminal portion 33 is formed in an insertion notch 29 b formed in the case portion 29 of the mounting base 4 </ b> B. Inserted and placed.

  As described above, the light emitter 27, the heat radiating member 12B, and the connection body 28 are attached to the attachment base 4B to constitute the light source unit 3B.

  The light source unit 3B is fixed to the reflector 2 by mounting screws 50 and 50 respectively inserted into screw insertion holes 11a and 11a formed in the mounting projections 11 and 11 of the mounting base 4B.

  A connector 100 connected to a power supply circuit (not shown) is connected to the second conduction terminal portion 33 of the light source unit 3B.

  As described above, the light source unit 3B is assembled by sliding the light emitting body 27 and the heat radiating member 12B into the mounting base 4B and attaching the connecting body 28. Therefore, the light source unit 3B is easy to assemble and improves the assemblability. Can be planned.

  Further, the light emitter 27, the heat radiating member 12B, and the connection body 28 can be exchanged with respect to the mounting base 4B, respectively, and the light emitter 27 and the heat radiating member 12B can be easily exchanged by sliding with respect to the mounting base 4B. It is possible to improve the maintainability.

  Furthermore, in the light source unit 3B, since the heat radiating member 12B is slid and inserted into the mounting base 4, the assemblability can be further improved.

  In the state in which the light source unit 3B is configured as described above, a current is supplied from the power supply circuit to the light emitting diode 18 via the connector 100, the connection body 28, and the power feeding portions 30b and 30b of the light emitting body 27. Light is emitted.

  When the light emitting diode 18 emits light, heat is generated in the light emitter 27 as the light is emitted. The generated heat is generated from the heat radiation notches 29a and 29a via the heat radiation member 12B and the slits 29c and 29c formed in the case portion 29. Released to ensure good heat dissipation.

  In the light source unit 3B in the second embodiment, the heat radiating member 34 may be used instead of the heat radiating member 12B (see FIG. 7). The heat radiating member 34 includes a base surface portion 34a facing in the front-rear direction and side surface portions 34b and 34b protruding rearward from the left and right end portions of the base surface portion 34a.

  The heat dissipating member 34 has a base surface portion 34a inserted into the second insertion space 4n from the second insertion port 4o of the mounting base 4B, and front end portions of the side surface portions 34b and 34b inserted into the slits 29c and 29c, respectively. Side surfaces 34b and 34b of heat radiating member 34 are positioned immediately inside heat radiating notches 29a and 29a of mounting base 4B, respectively.

  Therefore, heat generated during light emission of the light emitting diode 18 is conducted from the base surface portion 34a of the heat radiating member 34 to the side surface portions 34b and 34b, and heat is radiated from the heat radiating notches 29a and 29a, thereby ensuring good heat dissipation.

  Next, the light source unit 3C in the third embodiment will be described (see FIGS. 8 and 9).

  The light source unit 3C includes a mounting base 4C, and a light emitter 35 and a circuit board 36 which are inserted into the mounting base 4C and mounted.

  The mounting base 4C is made of, for example, an insulating material, and has a disk-shaped flange portion 37 facing in the front-rear direction, and protrudes forward from the flange portion 37. The outer shape of the mounting base 4C is rearward from the cylindrical holding portion 38 and flange portion 37. The connector part 39 protrudes.

  The holding portion 38 is formed with a placement recess 38a that opens forward. Positioning grooves 38b, 38b opened forward are formed in the front end portion of the outer peripheral portion of the holding portion 38 so as to be spaced apart in the circumferential direction.

  Connection protrusions 38c, 38c, and 38c are provided at positions on the outer peripheral surface of the holding portion 38 that are close to the flange portion 37 and spaced apart in the circumferential direction.

  The connector part 39 is formed in a concave shape opened rearward.

  In the mounting base 4C, an insertion space 4q opened upward in the holding portion 38 is formed, and an opening on the upper side of the insertion space 4q serves as an insertion port 4r. The insertion space 4q communicates with the arrangement recess 38a.

  The mounting base 4C is formed with an arrangement space 4s opened upward in the holding portion 38, and the upper opening of the arrangement space 4s is an insertion opening 4t. The arrangement space 4s is located on the rear side of the insertion space 4q.

  The light emitter 35 includes a light emitting diode 18 and a substrate 40 on which the light emitting diode 18 is mounted. A pair of power supply portions 40 a, 40 a is formed on the substrate 40, one end of each of the power supply portions 40 a, 40 a is connected to the light emitting diode 18, and the other end is positioned on both sides of the substrate 40.

  The circuit board 36 has power supply connection portions 36a and 36a on both sides. A plurality of electronic components 36b, 36b,... Are mounted on the front surface of the circuit board 36, and a plurality of contact portions (not shown) are formed on the rear surface.

  Connection portions 41, 41 are arranged in the holding base 38 of the mounting base 4C so as to be separated from each other in the left-right direction. The connecting portions 41 and 41 are formed integrally with the mounting base 4C by, for example, so-called insert molding in which a mold in which a metal member is disposed is filled with molten resin and molded. Each of the connection portions 41 and 41 has a front end portion provided as the first conduction portion 41a and 41a and a rear end portion provided as the second conduction portion 41b and 41b.

  Connector terminals 42, 42, 42 are disposed inside the mounting base 4C. The connector terminals 42, 42, 42 are formed integrally with the mounting base 4C by, for example, insert molding. The lower end portions of the connector terminals 42, 42, 42 protrude rearward from the flange portion 37 and are positioned inside the connector portion 39.

  The light emitter 35 and the circuit board 36 are inserted into the insertion space 4q and the placement space 4s from the insertion port 4r and the insertion opening 4t of the mounting base 4C, and are slid and fitted to the mounting base 4C.

  In a state where the light emitter 35 is attached to the attachment base 4C, the power feeding portions 40a and 40a formed on the substrate 40 of the light emitter 35 are connected to the first conduction portions 41a and 41a of the connection portions 41 and 41, respectively. . The light emitting diode 18 of the light emitting body 35 is positioned in the arrangement recess 38 a of the holding portion 38.

  In a state where the circuit board 36 is attached to the attachment base 4C, the power supply connection parts 36a and 36a of the circuit board 36 are connected to the second conduction parts 41b and 41b of the connection parts 41 and 41, respectively, and formed on the rear surface. A plurality of contact portions are connected to the connector terminals 42, 42, 42, respectively.

  A lens body 43 is attached to the front end portion of the holding portion 38 in the attachment base 4C. The lens body 43 includes, for example, a main body 43a and positioning protrusions 43b and 43b provided on the outer periphery of the main body 43a, and the positioning protrusions 43b and 43b engage with the positioning grooves 38b and 38b, respectively. Then, it is positioned and attached to the holding portion 38 by appropriate means such as adhesion. The main body 43a can be provided with various parts having necessary functions such as a light collecting part and a diffusing part for controlling light.

  As described above, the light emitter 35 and the circuit board 36 are attached to the attachment base 4C to constitute the light source unit 3C.

  The light source unit 3C is attached to an attachment portion of a lamp body (or reflector) (not shown). An attachment hole is formed in the attachment portion, and the attachment hole includes a circular portion and a plurality of protrusions continuously formed on the outer periphery of the circular portion, and the protrusions are spaced apart in the circumferential direction. Yes.

  In the light source unit 3 </ b> C, an O ring (not shown) is disposed on the front surface of the flange portion 37, and the holding portion 38 is inserted from the rear into an attachment hole formed in the attachment portion. At this time, the connection protrusions 38c, 38c, and 38c are inserted through the protrusions of the attachment holes, respectively.

  When the connection protrusions 38c, 38c, and 38c are inserted through the protrusions of the attachment holes, the O-ring is pressed against the rear surface of the attachment part, and in this state, the light source unit 3C is rotated with respect to the attachment part. When the light source unit 3C is rotated with respect to the attachment portion, the attachment portion is sandwiched by the connection protrusions 38c, 38c, 38c and the flange portion 37 via the O-ring, and the light source unit 3C is attached to the attachment portion.

  A connector 100 connected to a power supply circuit (not shown) is connected to the connector portion 39 of the light source unit 3C.

  As described above, the light source unit 3C is assembled by sliding and inserting the light emitter 35 and the circuit board 36 into the mounting base 4C. Therefore, the light source unit 3C is easy to assemble and the assemblability can be improved.

  Further, the light emitter 35 and the circuit board 36 can be exchanged with respect to the mounting base 4C, respectively, and the light emitter 35 and the circuit board 36 can be easily exchanged by sliding them with respect to the attachment base 4C. And maintainability can be improved.

  Furthermore, in the light source unit 3C, since the connection portions 41 and 41 and the connector terminals 42, 42, and 42 are integrally formed on the mounting base 3C, the manufacturing cost can be reduced by reducing the number of parts. .

  In the state in which the light source unit 3C is configured as described above, the power supply circuit passes through the connector 100, the connector terminals 42, 42, 42, the circuit board 36, the connection portions 41, 41, and the power feeding portions 40a, 40a of the light emitter 35. A current is supplied to the light emitting diode 18, and light is emitted from the light emitting diode 18.

  As described above, in the light source units 3, 3 A, 3 B, and 3 C, it is possible to improve maintenance and assembly, and the vehicle lamp 1 including the light source units 3, 3 A, 3 B, and 3 C is provided. Even in this case, it is possible to improve maintenance and assembly.

  In the above, the light source units 3, 3 A, 3 B, and 3 C are attached to the reflector or the lamp body by screwing with the mounting screws 50, 50 or by engaging the connection protrusions 38 c, 38 c, 38 c with the mounting portion by the flange portion 37. Although an example was shown, attachment to the reflector or lamp body of light source unit 3, 3A, 3B, 3C is not restricted to screwing or engagement. The light source units 3, 3A, 3B, and 3C can be attached to the reflector or the lamp body by appropriate means such as welding, adhesion, and press-fitting in addition to screwing and engagement.

  The shapes and structures of the respective parts shown in the above-described best mode are merely examples of implementations in carrying out the present invention, and the technical scope of the present invention is limitedly interpreted by these. It should not be done.

FIG. 2 to FIG. 9 show the best mode of the present invention together with FIG. 2 and FIG. 9 is a side view showing a part of the light source unit according to the first embodiment attached to a reflector. . It is a disassembled perspective view of the light source unit in 1st Embodiment. It is a perspective view of the light source unit in 1st Embodiment. It is a disassembled perspective view of the light source unit in the modification of 1st Embodiment. It is a disassembled perspective view of the light source unit in 2nd Embodiment. It is a perspective view of the light source unit in 2nd Embodiment. It is a disassembled perspective view which shows the example in which another heat radiating member was used in 2nd Embodiment of a light source unit. It is a disassembled perspective view of the light source unit in 3rd Embodiment. It is an expanded sectional view of the light source unit in 3rd Embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 2 ... Reflector, 3 ... Light source unit, 4 ... Mounting base, 4a ... Insertion space, 4b ... Insertion port, 4d ... Arrangement space, 4e ... Insertion opening, 12 ... 1st thermal radiation member DESCRIPTION OF SYMBOLS 13 ... 2nd thermal radiation member, 14a ... Circuit pattern (feed part), 15 ... Light source connection part (board | substrate), 16 ... Circuit formation part (circuit board | substrate), 18 ... Light emitting diode, 20 ... Light-emitting body, 3A ... Light source Unit, 4A ... Mounting base, 4i ... Second insertion space, 4j ... Second insertion port, 21 ... Light emitter, 26 ... Substrate, 26a ... Power feeding unit, 3B ... Light source unit, 4B ... Mounting base, 4n ... 2nd insertion space, 4o ... 2nd insertion port, 12B ... Heat dissipation member, 27 ... Light emitter, 30 ... Substrate, 30b ... Power feeding part, 31 ... Circuit board, 34 ... Heat dissipation member, 3C ... Light source unit, 4C ... Mounting base, 4q ... Insertion space, 4r ... Insertion Mouth, 4s ... placement space, 4t ... insertion opening, 35 ... light emitter, 36 ... circuit board, 40 ... substrate, 40a ... power supply unit, 41 ... connecting portion

Claims (5)

A light-emitting body having a light-emitting diode provided as a light source and a flexible printed wiring board provided with a pair of power-feeding parts for supplying power to the light-emitting diode;
A mounting base on which the light emitter is fixed in a replaceable manner;
The light source unit is characterized in that the attachment base is attached from behind to an attachment hole of a vehicular lamp . The flexible printed wiring board includes a light source connecting portion and a circuit forming portion and a connecting portion that connects both,
A light emitting diode is mounted on the light source connection part,
The light source unit according to claim 1, wherein an electronic component that controls a light emitting state of the light emitting diode is mounted on the circuit forming unit. The light source unit according to claim 1, wherein a heat radiating member that releases heat generated when the light emitting diode emits light is disposed on one surface of the flexible printed wiring board . Providing a connecting portion connected to each of the pair of feeding portions of the light emitter;
The light source unit according to claim 1, wherein the connection portion is formed integrally with the mounting base. A light emitter and a substrate having a pair of power feeding portion is provided to power the light emitting diode and light emitting diode provided as the light source,
A mounting base on which the light emitter is fixed in a replaceable manner;
The mounting base is mounted from the rear to the mounting hole of the vehicle lamp,
A light source unit, wherein a lens body for controlling light emitted from a light emitting diode as a light source is attached to the mounting base .

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