JP7221783B2 - Power supply attachment and lighting unit - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power supply attachment for supplying power to a light emitting element and a lamp unit provided with the power supply attachment.

Conventionally, as described in "Patent Document 1", for example, as a power supply attachment for supplying power to a light emitting element such as a light emitting diode, a pair of bus bar electrodes are insulated with a part thereof exposed. A structure embedded in a member is known.

In the power supply attachment described in "Patent Document 1", a pair of first terminal portions electrically connected to a light emitting element and an external power source are connected by a portion of the pair of bus bar electrodes exposed from the insulating member. A pair of second terminal portions to be electrically connected are configured, and the insulating member has an opening portion for exposing the pair of first terminal portions and a connector portion for accommodating the pair of second terminal portions. and are formed.

JP 2014-197550 A

In the power supply attachment described in the above-mentioned "Patent Document 1", the pair of second terminal portions are arranged vertically side by side in the internal space of the connector portion, so the vertical dimension of the connector portion is This makes it difficult to reduce the thickness of the power supply attachment.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and provides a power supply attachment for supplying power to a light-emitting element that can be made thinner. An object of the present invention is to provide a lamp unit with an attachment.

The present invention is intended to achieve the above object by devising the arrangement of the pair of second terminal portions.

That is, the power supply attachment according to the present invention is
A power supply attachment for supplying power to a light emitting element, the power supply attachment comprising a pair of busbar electrodes embedded in an insulating member with a part of the busbar electrodes exposed,
A pair of first terminal portions electrically connected to the light emitting element and a pair of second terminals electrically connected to an external power supply by the portions of the pair of bus bar electrodes exposed from the insulating member. is composed of
The insulating member is formed with an opening that exposes the pair of first terminal portions and a connector portion that accommodates the pair of second terminal portions,
The pair of second terminal portions are arranged horizontally side by side in the internal space of the connector portion.

The type of the "insulating member" is not particularly limited, and for example, a member made of resin, a member made of ceramics, or the like can be adopted.

The type of the "light-emitting element" is not particularly limited, and for example, a light-emitting diode, a laser diode, or the like can be used.

A specific positional relationship between the "first terminal portion" and the "second terminal portion" is not particularly limited.

In the power supply attachment according to the present invention, the first terminal portion electrically connected to the light emitting element and the external power supply are electrically connected by the exposed portions from the insulating member of the plurality of busbar electrodes embedded in the insulating member. The insulating member is formed with an opening for exposing the pair of first terminal portions and a connector portion for accommodating the pair of second terminal portions. Since the pair of second terminal portions are arranged horizontally in the inner space of the connector portion, the vertical dimension of the connector portion can be reduced, thereby reducing the thickness of the power supply attachment. be able to.

Thus, according to the present invention, it is possible to reduce the thickness of the power supply attachment for supplying power to the light emitting element.

In the above configuration, if the connector portion is configured so as to overlap the opening with respect to the first direction in which the pair of second terminal portions are arranged, the power supply attachment may be, for example, a vehicle headlamp. Even in the case where the lamp unit is used for a pair of left and right lamp units, it is possible to easily share the power supply attachment between both lamp units.

In the above configuration, further, as the configuration of the pair of second terminal portions, each of the pair of second terminal portions is formed in a plate shape, and the plate surfaces are arranged so as to face a second direction orthogonal to the first direction. By doing so, the vertical dimension of the connector portion can be further reduced, so that the thickness of the power supply attachment can be further reduced.

As a configuration of the lamp unit including such a power supply attachment and a light emitting element, the power supply attachment and the light emitting element are supported by a heat sink together with an optical member for controlling the light emitted from the light emitting element. With the configuration in which the insulating member of the power supply attachment is formed with a recess for accommodating at least a portion of the connector portion, the following effects can be obtained.

That is, it is possible to easily avoid interference with the connector portion by forming the recess in the heat sink. As a result, it is possible to effectively suppress deterioration of the heat dissipation function of the heat sink.

In this case, if an engagement hole for engaging the connector portion with the connector on the external power source side is formed in the upper wall portion of the connector portion, the connector portion can be connected to the connector on the external power source side at the engagement hole. By engaging with the connector, it is possible to easily maintain the electrical connection between the power supply attachment and the external power source by fitting the connector portion and the connector on the external power source side. It is possible to visually check the engagement hole.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional side view showing a vehicle lamp including a power supply attachment and a lamp unit according to an embodiment of the present invention; Plan view showing the lamp unit Detailed view of part III in Fig. 1 Figure 3 IV direction arrow view V direction arrow view of FIG. FIG. 5 is a view similar to FIG. 4 showing a modification of the above embodiment;

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing a vehicle lamp 100 including a power supply attachment 30 and a lamp unit 10 according to one embodiment of the present invention. 2 is a plan view showing the lamp unit 10. FIG.

In these figures, the direction indicated by X is the "front of the unit", the direction indicated by Y is the "left direction" perpendicular to the "front of the unit" ("right direction" when viewed from the front of the unit), and the direction indicated by Z. is the "upward direction". The same applies to figures other than these.

A vehicle lamp 100 is a headlamp provided at the front end of a vehicle. It is housed in a state in which the optical axis has been adjusted so as to match the longitudinal direction of the vehicle.

The lamp unit 10 includes a projection lens 12, a light emitting element 14 arranged behind the rear focal point F of the projection lens 12, and a light emitting element 14 arranged to cover the light emitting element 14 from above. 14 and a movable shade 18 arranged between the light emitting element 14 and the projection lens 12 .

The projection lens 12 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and has an optical axis Ax extending in the front-rear direction of the unit. The projection lens 12 projects the light source image formed on the rear focal plane, which is the focal plane including the rear focal point F, as an inverted image onto a virtual vertical screen in front of the lamp.

FIG. 3 is a detailed view of part III in FIG. 4 is a view in the direction of arrow IV in FIG. 3, and FIG. 5 is a view in the direction of arrow V in FIG.

As shown in these figures, the light emitting element 14 is a white light emitting diode and has a horizontally long rectangular light emitting surface 14a. The light emitting element 14 is supported by the heat sink 22 via the light source supporting member 20 with the light emitting surface 14a facing upward below the optical axis Ax.

A light source support area 22a1, in which the light source support member 20 is supported on the upper surface 22a of the heat sink 22, is formed in a planar shape so as to protrude upward with respect to the surrounding area. The light source support area 22a1 and its peripheral area are formed of an inclined surface that is inclined downward toward the rear of the unit. there is

A power supply attachment 30 for supplying power to the light emitting element 14 is attached to the upper surface 22a of the heat sink 22 (this will be described later).

The reflector 16 has a reflective surface 16a formed of a substantially ellipsoidal curved surface with the light emission center of the light emitting element 14 as the first focus. The reflective surface 16a has an elliptical cross-sectional shape along its long axis with a second focus at a point located slightly forward of the rear focal point F, and its eccentricity is set to It is set to gradually increase toward The reflector 16 is supported by heat sinks 22 on both left and right sides thereof (this will also be described later).

On the other hand, the projection lens 12 is supported by a lens holder 24 at its outer peripheral flange portion.

The lens holder 24 includes a holder main body 24A for supporting the projection lens 12, a pair of left and right arm portions 24B formed to extend rearward of the unit from both left and right sides of the holder main body 24A, and a pair of left and right arms. A connecting portion 24C that connects the rear end portion of the portion 24B. At that time, the pair of left and right arm portions 24B are formed so as to bend toward the optical axis Ax at their rear end portions, and the connecting portion 24C is formed so as to surround the reflector 16 in a substantially arc shape. . The lens holder 24 is attached to the heat sink 22 in the vicinity of the rear end portions of the pair of left and right arm portions 24B (this will also be described later).

As shown in FIG. 1, the movable shade 18 is rotatably supported by the heat sink 22 via a rotating pin 26 extending in the horizontal direction below the optical axis Ax. The movable shade 18 is formed so as to extend obliquely upward from its front end toward the rear of the unit, and its upper edge 18a is formed so as to extend horizontally in a stepped manner.

The movable shade 18 has a light shielding position (the position indicated by the solid line in FIG. 1) at which part of the reflected light from the reflector 16 directed toward the projection lens 12 is shielded by driving the actuator 28 supported by the heat sink 22; A light blocking release position (a position indicated by a chain double-dashed line in FIG. 1) can be obtained by turning downward from this light blocking position by a predetermined angle to release the light blocking. The actuator 28 is supported by the heat sink 22 by screwing and is driven when a beam switching switch (not shown) is operated.

As shown in FIG. 4, the light source support member 20 that supports the light emitting element 14 has a laterally long rectangular outer shape in a plan view. A pair of left and right terminal portions 20a electrically connected to 14 cathode electrodes and 14 anode electrodes are arranged.

In the power supply attachment 30, a pair of left and right bus bar electrodes 34 for achieving electrical continuity with the light emitting element 14 are partially exposed from an insulating member 32 formed so as to surround the light source support member 20. It is configured as an insert-molded product that is buried in a

The insulating member 32 is a plate-like member having a laterally long rectangular outer shape in a plan view, and has a laterally long rectangular opening 32a formed at the center position in the left-right direction.

The insulating member 32 has a pair of left and right flange portions 32b that horizontally protrude from both left and right sides thereof. At that time, a pair of left and right positioning pins 22b are formed on the upper surface 22a of the heat sink 22, and a pair of left and right positioning pins 22b are engaged with the pair of left and right flange portions 32b of the insulating member 32. Holes 32c are formed respectively. One of the pair of left and right engagement holes 32c is formed in a circular shape, and the other is formed in a horizontally long rectangular shape.

The pair of left and right busbar electrodes 34 are provided with two pairs of left and right terminal pieces 34a protruding into the opening 32a. It is designed to be electrically connected.

The pair of left and right bus bar electrodes 34 are provided with two pairs of front and rear pressing pieces 34b protruding into the opening 32a. 22 so as not to float.

At this time, each terminal piece 34a and each pressing piece 34b are configured as elastic pieces that elastically press the light source support member 20 from above.

The insulating member 32 has a connector portion 32d projecting from its rear portion toward the rear of the unit.

The connector portion 32d is formed to extend to the rear side of the unit from the rear end position of the reflector 16, and is open toward the rear of the unit. In this case, the connector portion 32d is formed at the central position (that is, the position just below the optical axis Ax) of two fastening positions on the left and right between the insulating member 32 and the heat sink 22 . Further, the connector portion 32d is formed so as to protrude in both the upper and lower sides on the rear side of the unit from the rear end position of the reflector 16. As shown in FIG.

A rectangular hole 32d1 extending in the front-rear direction of the unit is formed in the upper wall portion of the connector portion 32d, and rectangular concave portions 32d2 are formed in the left and right side wall portions of the connector portion 32d.

Terminal pins 34c of a pair of left and right bus bar electrodes 34 protrude toward the rear of the unit in the internal space of the connector portion 32d. Each of the pair of left and right terminal pins 34c is formed in a plate-like shape, and the plate surface is slanted toward the rear side of the unit with respect to the vertical direction (that is, the pair of left and right terminal pins 34c are arranged side by side). (second direction perpendicular to the first direction). Then, as shown in FIG. 3, the connector 52 of the power supply wiring 50 is inserted into the internal space of the connector portion 32d from the rear side of the unit, and fitted with the rectangular hole 32d1 and the pair of left and right concave portions 32d2 of the connector portion 32d. By fitting together, the power supply attachment 30 and the power supply wiring 50 are electrically connected.

An elastic arm 52a extending toward the rear of the unit is formed on the upper portion of the connector 52, and a lance portion 52a1 is formed on the upper surface of the elastic arm 52a. When the connector 52 is inserted into the internal space of the connector portion 32d, the elastic arm 52a is bent and deformed so that the lance portion 52a1 is engaged with the rectangular hole 32d1 of the connector portion 32d. The fitted state of the two is maintained by the .

The heat sink 22 is formed such that its rear end position is substantially at the same position as the rear end edge of the connector portion 32d. A concave portion 22a2 having a shape along the shape of the lower end portion of the connector portion 32d is formed on the upper surface 22a of the rear end portion of the heat sink 22 (that is, the surface on which the power supply attachment 30 is placed). Furthermore, a plurality of heat radiation fins 22c are formed in the rear region of the heat sink 22 so as to extend downward.

As shown in FIG. 4, the reflector 16 has a pair of left and right flange portions 16b projecting horizontally from the lower ends of the left and right sides thereof in a flat plate shape. It is fixed to the upper surface 22 a of the heat sink 22 together with the holder 24 .

At this time, the portion of the upper surface 22a of the heat sink 22 to which the reflector 16 is attached is formed as a pair of left and right upward protruding surfaces 22a3 that protrude upward from other portions of the upper surface 22a as shown in FIG. A pair of left and right mounting surfaces 24Ba for mounting a pair of left and right flange portions 16b of the reflector 16 are formed near the rear end portion of the pair of left and right arm portions 24B of the lens holder 24. there is The pair of left and right mounting surfaces 24Ba are inclined downward toward the rear of the unit. is set to the same value as the tilt angle of

A pair of left and right positioning pins 24b are formed on the pair of left and right placement surfaces 24Ba. On the other hand, the pair of left and right flange portions 16b of the reflector 16 are formed with engagement holes 16c that engage with the pair of left and right positioning pins 24b. One of the pair of left and right engagement holes 16c is circular, and the other is oblong.

A pair of left and right flange portions 16b of the reflector 16 are formed with a pair of left and right screw insertion holes 16d, and a pair of left and right mounting surfaces 24Ba of the lens holder 24 are formed with a pair of left and right screw insertion holes 24d. are formed, one of which is circular and the other is oblong.

As shown in FIGS. 4 and 5, the reflector 16 is formed with contact portions 16e that contact the heat sink 22 at positions located on the rear side of the unit relative to the two fastening positions on the left and right sides of the heat sink 22. As shown in FIG. The abutment portion 16e is formed as a projection extending downward from the lower end portion of the reflector 16 at a position near the left side of the recessed portion 22a2 of the heat sink 22, and then abutting against the upper surface 22a of the heat sink 22. configured to touch. As a result, the reflector 16 is supported by the heat sink 22 with a three-point support structure, and the positioning accuracy of the reflector 16 is enhanced.

Further, as shown in FIG. 1, contact portions 22d that contact the lens holder 24 are formed at the front end portions of the pair of left and right upwardly projecting surfaces 22a3 on the upper surface 22a of the heat sink 22, respectively.

The pair of left and right contact portions 22 d are formed as projections extending upward, and are configured to contact the lower surfaces of the pair of left and right arm portions 24 B of the lens holder 24 .

Next, the operation of this embodiment will be described.

The power supply attachment 30 according to the present embodiment includes terminal strips 34 a (first terminal strips 34 a ) electrically connected to the light emitting element 14 by exposed portions of the pair of left and right busbar electrodes 34 embedded in the insulating member 32 , which are exposed from the insulating member 32 . terminal portion) and a terminal pin 34c (second terminal portion) electrically connected to an external power supply. A connector portion 32d that accommodates a pair of terminal pins 34c is formed. Since the pair of terminal pins 34c are arranged horizontally in the inner space of the connector portion 32d, the connector portion 32d The dimension in the vertical direction can be reduced, and thus the thickness of the power supply attachment 30 can be reduced.

As described above, according to the present embodiment, the thickness of the power supply attachment 30 for supplying power to the light emitting element 14 can be reduced.

At this time, in the power supply attachment 30 according to the present embodiment, the connector portion 32d of the insulating member 32 overlaps the opening 32a of the insulating member 32 in the left-right direction (that is, in the first direction in which the pair of terminal pins 34c are arranged). (specifically, the central position in the left-right direction of the opening 32a), the power supply attachment 30 is used for a pair of left and right lamp units 10 like the vehicle lamp 100 according to the present embodiment. Even in this case, it is possible to easily share the power supply attachment 30 between the two lamp units 10 .

Moreover, the terminal pins 34c of the pair of left and right busbar electrodes 34 are each formed in a plate shape, and the plate surface is tilted toward the rear side of the unit with respect to the vertical direction (that is, perpendicular to the first direction). ), the vertical dimension of the connector portion 32d can be further reduced, so that the power supply attachment 30 can be made even thinner.

In the lamp unit 10 according to the present embodiment, the power supply attachment 30 and the light emitting element 14 are supported by the heat sink 22 together with the reflector 16 (optical member) that controls the light emitted from the light emitting element 14. The upper surface 22a (that is, the surface on which the power supply attachment 30 is placed) is formed with a concave portion 22a2 that accommodates at least a portion of the connector portion 32d of the insulating member 32 of the power supply attachment 30. Therefore, the following effects can be achieved. can be obtained.

That is, by forming the concave portion 22a2 on the upper surface 22a of the heat sink 22, interference with the connector portion 32d can be easily avoided. It is possible to effectively suppress deterioration of the heat dissipation function of the heat sink 22 due to the formation of the concave portion 22a2 on the upper surface 22a of the heat sink 22 .

A rectangular hole 32d1 (engagement hole) for engaging the connector portion 32d with a connector on the external power supply side is formed in the upper wall portion of the connector portion 32d. By engaging the connector 52 on the side of the external power supply at 32d1, it becomes possible to easily maintain electrical connection between the power supply attachment 30 and the external power supply by fitting the connector portion 32d and the connector 52 on the side of the external power supply. Moreover, it is possible to visually confirm the fitted state at the rectangular hole 32d1 of the connector portion 32d.

In the above embodiment, the rectangular hole 32d1 is formed in the connector portion 32d of the insulating member 32 of the power supply attachment 30 as an engagement hole for engaging the connector portion 32d with the connector 52 on the side of the external power supply. As described above, it is also possible to employ a configuration in which an engagement hole having an opening shape other than a rectangle (for example, an oval shape, etc.) is formed.

In the above embodiment, the case where the lamp unit 10 is a projector-type lamp unit including the reflector 16 has been described, but the configuration of the above-described embodiment can also be applied to a parabola-type lamp unit or the like.

In the above embodiment, the lamp unit 10 is described as a vehicle-mounted lamp unit, but it can also be used for applications other than vehicle-mounted.

Next, a modification of the above embodiment will be described.

FIG. 6 is a view, similar to FIG. 4, showing the essential parts of the lamp unit 110 according to this modification.

As shown in the figure, the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the power supply attachment 130 in this modification is partially different from that of the above embodiment. Along with this, the configuration of the heat sink 122 is partially different from that of the above embodiment.

That is, in the power supply attachment 130 of this modification, the connector portion 132d of the insulating member 132 overlaps the opening 132a of the insulating member 132 in the left-right direction (that is, in the direction in which the pair of terminal pins 134Ac and 134Bc are arranged). The formation position is set to a position displaced rightward from the central position of the opening 132a in the left-right direction, so that the connector portion 132d and the opening 132a are partially aligned in the left-right direction. Duplicate.

Accordingly, a pair of left and right busbar electrodes 134A and 134B are configured such that their terminal pins 134Ac and 134Bc are formed at positions displaced rightward from the central position of the opening 132a.

Further, a concave portion 122a2 formed in the upper surface 122a of the rear end portion of the heat sink 122 and having a shape along the shape of the lower end portion of the connector portion 132d is also displaced rightward from the central position of the opening portion 132a.

The shape of the connector portion 132d itself is the same as in the above-described embodiment, and a rectangular hole 132d1 extending in the front-rear direction of the unit is formed in the upper wall portion thereof.

Even when the configuration of this modified example is adopted, the connector portion 132d of the insulating member 132 is formed at a position overlapping the opening portion 132a in the left-right direction, so that substantially the same effects as in the case of the above-described embodiment can be obtained. Obtainable.

In addition, as in the power supply attachment 130 according to this modification, by adopting a configuration in which the connector portion 132d of the insulating member 132 is displaced rightward from the central position of the opening 132a, the reflector 16 is formed with It is possible to further displace the position of the abutment portion 16e that has been moved toward the rear side of the unit. As a result, the reflector 16 can be supported by the heat sink 22 with a more stable three-point support structure.

The numerical values shown as the specifications in the above embodiment and its modification are merely examples, and it goes without saying that these values may be set to different values as appropriate.

Moreover, the present invention is not limited to the configurations described in the above embodiments and modifications thereof, and configurations with various other modifications can be employed.

Reference Signs List 10, 110 lamp unit 12 projection lens 14 light emitting element 14a light emitting surface 16 reflector 16a reflecting surface 16b flange portion 16c engagement hole 16d, 24d screw insertion hole 16e, 22d contact portion 18 movable shade 18a upper edge 20 light source support member 20a terminal Part 22, 122 Heat sink 22a, 122a Upper surface 22a1 Light source support area 22a2, 122a2 Recess 22a3 Upper projecting surface 22b, 24b Positioning pin 22c Radiation fin 24 Lens holder 24A Holder main body 24B Arm 24Ba Mounting surface 24C Connecting part 26 Rotating pin 28 Actuator 30, 130 Power supply attachment 32, 132 Insulating member 32a, 132a Opening 32b Flange 32c Engaging hole 32d, 132d Connector 32d1, 132d1 Rectangular hole (engaging hole)
32d2 recessed portion 34, 134A, 134B busbar electrode 34a terminal piece (first terminal portion)
34b holding piece 34c, 134Ac, 134Bc terminal pin (second terminal portion)
40, 42 screw 50 power supply wiring 52 connector 52a elastic arm 52a1 lance portion 100 vehicle lamp 102 lamp body 104 translucent cover Ax optical axis F rear focus

Claims (5)

A power supply attachment for supplying power to a light emitting element, the power supply attachment comprising a pair of busbar electrodes embedded in an insulating member with a part of the busbar electrodes exposed,
A pair of first terminal portions electrically connected to the light emitting element and a pair of second terminals electrically connected to an external power supply by the portions of the pair of bus bar electrodes exposed from the insulating member. is composed of
The insulating member is formed with an opening that exposes the pair of first terminal portions and a connector portion that accommodates the pair of second terminal portions,
The power supply attachment, wherein the pair of second terminal portions are horizontally arranged in an internal space of the connector portion. 2. The power supply attachment according to claim 1, wherein the connector portion is formed at a position overlapping with the opening portion with respect to the first direction in which the pair of second terminal portions are arranged. The pair of second terminal portions are each formed in a plate shape, and are arranged such that the plate surfaces face a second direction perpendicular to the first direction. Item 3. The power supply attachment according to item 1 or 2. A light emitting device and a power supply attachment according to any one of claims 1 to 3, an optical member for controlling light emitted from the light emitting device, and a heat sink for supporting the light emitting device, the power supply attachment and the optical member. In the lighting unit,
A lighting unit, wherein the heat sink is formed with a recess for accommodating at least a portion of the connector section. 5. The lamp unit according to claim 4, wherein an engagement hole is formed in the upper wall portion of the connector portion for engaging the connector portion with the connector on the external power supply side.

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