Vehicular lighting fixture

Abstract

To provide a vehicular lighting fixture having a simple structure.SOLUTION: A second lighting fixture unit 20 comprises: an LED 28; a board 26 equipped with the LED 28; a heat sink 24 supporting the board 26; and an optical member 30 comprising a lens 30a for deflecting light from the LED 28, a flange part 30b formed around the lens 30a, and a lance part 30c provided in the flange part 30b. While the board 26 is sandwiched between the heat sink 24 and the flange part 30b, the lance part 30c is locked by being inserted into a lance insertion hole 24g provided in the heat sink 24, and thereby the board 26 and the optical member 30 are fixed to the heat sink 24.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle lamp.

Background Art

[0002] Conventionally, a vehicle lamp including a light source such as an LED and an optical member such as a lens that deflects light from the light source has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a vehicle lamp having the above-described configuration, it is necessary to appropriately align and fix the light source and the optical member. In order to realize an inexpensive vehicle lamp, it is desirable to fix the light source and the optical member with a simple structure.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicle lamp having a simple structure.

Means for Solving the Problems

[0006] To solve the above problems, a vehicle lamp according to an aspect of the present invention includes a light source, a substrate on which the light source is mounted, a heat sink that supports the substrate, an optical functional portion that deflects light from the light source, a flange portion formed around the optical functional portion, and a lance portion provided on the flange portion, and an optical member including the lance portion. The substrate and the optical member are fixed to the heat sink by inserting and locking the lance portion into a lance insertion hole provided in the heat sink with the substrate sandwiched between the heat sink and the flange portion.

Effects of the Invention

[0007] According to the present invention, a vehicle lamp with a simple structure can be provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0009] Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments. The following configurations are for the purpose of exemplification for understanding the present disclosure, and the scope of the present disclosure is determined only by the appended claims. The same or equivalent components and members shown in each drawing are denoted by the same reference numerals, and repeated explanations are omitted as appropriate. In addition, the dimensions of the members in each drawing are shown enlarged or reduced as appropriate for easy understanding. Also, some members that are not important for explaining the embodiments in each drawing are omitted from the display. Further, when terms indicating directions such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. are used in this specification, they mean the directions in the posture when the vehicle lamp is mounted on the vehicle.

[0010] FIG. 1 is a schematic front view of a vehicle lamp 10 according to an embodiment of the present invention. As shown in FIG. 1, the vehicle lamp 10 includes a lamp body 12 and a transparent outer cover 14 that covers the front opening of the lamp body 12. The lamp body 12 and the outer cover 14 form a lamp chamber 16.

[0011] The vehicle lamp 10 according to the present embodiment is a combination headlamp, and a first lamp unit 18 and a second lamp unit 20 are arranged in the lamp chamber 16.

[0012] The first lamp unit 18 is a lamp unit that functions as a high & low beam lamp. The structure of the first lamp unit 18 that functions as a high & low beam lamp is not particularly limited, and for example, a reflective type or a projector type lamp unit can be used.

[0013] The second lamp unit 20 is a lamp unit for forming a wide distribution low beam that expands the irradiation range of the low beam by the first lamp unit 18.

[0014] FIG. 2 is a perspective view of the second lamp unit 20. FIG. 3 is an exploded perspective view of the second lamp unit 20. FIG. 4 is a front view of the vehicle lamp 10. FIG. 5 is a cross-sectional view taken along line A-A of the vehicle lamp 10 shown in FIG. 4.

[0015] As shown in FIGS. 2 to 5, the second lamp unit 20 includes a heat sink 24, a substrate 26, an LED 28, and an optical member 30.

[0016] The LED 28 is used as a light source of the second lamp unit 20, and its emission color is white. As shown in FIG. 3, the first LED 28 is mounted on the substrate 26 such that its optical axis Ax faces the vertical direction with respect to the substrate 26. The LED 28 emits light by the supply of current from the substrate 26. A waiting-side connector 29 for power supply is provided on the substrate 26 so as to protrude toward the optical member 30 side. Further, positioning holes 26a (two places) are provided in the substrate 26.

[0017] The heat sink 24 has a function of supporting the substrate 26, a function of dissipating heat from the LED 28, and a function of fixing the entire second lighting unit 20 to the lamp body 12. In the present embodiment, the heat sink 24 is formed by bending a metal plate such as an aluminum plate, for example.

[0018] The heat sink 24 includes a substrate support portion 24a that supports the substrate 26, and a lighting unit fixing portion 24b for fixing the entire second lighting unit 20 to the lamp body 12 with bolts 32. The substrate support portion 24a is formed in a flat plate shape and is provided with positioning holes 24c (two places). The lighting unit fixing portion 24b is provided above and below the substrate support portion 24a and is provided with holes 24d (two places) for inserting the bolts 32 and positioning holes 24e (two places) for inserting positioning pins 13 protruding from the lamp body 12.

[0019] The heat sink 24 further includes optical member fixing portions 24f for fixing the optical member 30 on the left and right sides of the substrate support portion 24a. When the heat sink 24 is viewed from the front, two lance insertion holes 24g are provided in the optical member fixing portion 24f on the right side, and one lance insertion hole 24g is provided in the optical member fixing portion 24f on the left side.

[0020] FIG. 6 is a rear view of the optical member 30. The optical member 30 includes a lens 30a as an optical functional portion that deflects light from the LED 28, a flange portion 30b formed around the lens 30a, lance portions 30c (three places) provided on the flange portion 30b, and an opening 30d through which the standby side connector 29 is inserted. The optical member 30 is formed of a transparent resin material such as acrylic or polycarbonate, for example.

[0021] The lens 30a is configured to deflect light from the LED 28 and project light having a desired light distribution pattern. In the present embodiment, the lens 30a is formed so as to be able to project a light distribution pattern that irradiates the side of the low beam.

[0022] The flange portion 30b is formed in a substantially flat plate shape extending from the peripheral edge of the lens 30a. The flange portion 30b includes a stepped portion 30e where the flat plate extending from the peripheral edge of the lens 30a steps down by one level toward the heat sink 24 side.

[0023] The lance portions 30c are provided on the back side of the flange portion 30b. When viewing the optical member 30 from the front, two lance portions 30c are provided on the right side of the flange portion 30b, and one lance portion 30c is provided on the left side of the flange portion 30b. These lance portions 30c are provided at positions overlapping with the portion of the flange portion 30b where the stepped portion 30e is formed. The portion of the flange portion 30b where the stepped portion 30e is formed has a larger thickness and a higher section modulus. Therefore, the strength of the lance portion 30c can be increased as compared with the case where the lance portion 30c is provided on the flat portion of the flange portion 30b.

[0024] As shown in FIG. 6, positioning pins 30f (at two locations) project on the back side of the flange portion 30b. In the present embodiment, the positioning pins 30f are provided above and below the lens 30a. By disposing the positioning pins 30f near the lens 30a, the positioning accuracy between the LED 28 and the lens 30a can be improved.

[0025] When assembling the second lamp unit 20 according to this embodiment, the positioning holes 24c of the heat sink 24 and the positioning holes 26a of the substrate 26 are aligned, and the substrate 26 is disposed on the substrate support portion 24a of the heat sink 24. Then, the optical member 30 is aligned with respect to the heat sink 24 and the substrate 26 such that the positioning pins 30f of the optical member 30 pass through the positioning holes 24c and 26a. Then, with the substrate 26 sandwiched between the heat sink 24 and the flange portion 30b of the optical member 30, the lance portion 30c is inserted and locked into the lance insertion hole 24g of the heat sink 24. At this time, the standby connector 29 passes through the opening 30d of the optical member 30. Thus, the second lamp unit 20 according to this embodiment has a simple structure in which the lance portion 30c of the optical member 30 is inserted and locked into the lance insertion hole 24g of the heat sink 24 with the substrate 26 sandwiched between the heat sink 24 and the optical member 30, and the cost of the vehicle lamp 10 can be reduced.

[0026] Figure 7 is a cross-sectional view taken along line B-B of the vehicle lamp 10 shown in FIG. 4. With reference to FIG. 7, the fixing structure of the substrate 26 and the optical member 30 with respect to the heat sink 24 will be described in detail.

[0027] As shown in FIG. 6, a plurality (four) of substrate pressing portions 30g are provided on the back surface of the flange portion 30b (the surface facing the substrate 26). The substrate pressing portion 30g is formed in a trapezoidal shape protruding from the back surface of the flange portion 30b toward the substrate 26 side. When the substrate 26 is sandwiched between the heat sink 24 and the optical member 30, the substrate 26 is pressed against the heat sink 24 by these substrate pressing portions 30g. By providing the substrate pressing portion 30g in this way and limiting the portion for pressing the substrate 26, it is possible to reliably press the substrate 26 as compared with the case where the substrate 26 is pressed by the planar flange portion 30b.

[0028] The lance portion 30c includes a leg portion 30h extending from the back surface of the flange portion 30b toward the heat sink 24 side, and a locking portion 30i protruding from the leg portion 30h toward the outside of the flange portion 30b. When fixing the optical member 30 to the heat sink 24, the leg portion 30h of the lance portion 30c is inserted into the lance insertion hole 24g of the heat sink 24 while being pressed and bent in the inner direction of the flange portion 30b. When the locking portion 30i is inserted, the pressing is stopped. Then, as shown in FIG. 7, the locking portion 30i is locked to the edge of the lance insertion hole 24g, and the optical member 30 is fixed to the heat sink 24.

[0029] In the present embodiment, when the lance portion 30c is inserted and locked into the lance insertion hole 24g, with the substrate pressing portion 30g as a fulcrum, the end portion 30j of the flange portion 30b is bent, and the substrate pressing portion 30g can strongly press the substrate 26 against the heat sink 24. In FIG. 7, the outer shape of the end portion 30j of the flange portion 30b when there is no bending is illustrated by a broken line DL. By strengthening the pressing force at the substrate pressing portion 30g in this way, the heat sink 24 and the optical member 30 can be securely fixed to the heat sink 24, and displacement between the LED 28 and the lens 30a due to vibration or the like can be prevented.

[0030] When inserting the lance portion 30c into the lance insertion hole 24g, the locking portion 30i of the lance portion 30c rubs against the edge 24h of the lance insertion hole 24g. Since the lance portion 30c is formed of resin and the edge 24h of the lance insertion hole 24g is formed of metal, there is a risk that the locking portion 30i of the lance portion 30c may be worn when the two rub against each other. Therefore, chamfering may be performed on the edge 24h of the lance insertion hole 24g to prevent the locking portion 30i from being worn.

[0031] In the second lighting unit 20 according to the present embodiment, an opening 30d is provided in the flange portion 30b of the optical member 30, and the standby side connector 29 provided on the substrate 26 protrudes from the opening 30d. By arranging the standby side connector 29 in this way, the second lighting unit 20 can be miniaturized as compared with, for example, the case where the standby side connector 29 is provided below the second lighting unit 20.

[0032] Also, in the second lamp unit 20 according to the present embodiment, as shown in FIG. 6, an opening 30d is provided between two substrate pressing portions 30g. By adopting such an arrangement, the fastening stress is evenly applied and well-balanced, leading to an improvement in strength. Further, there is an advantage that the unit size can be made compact because the two substrate pressing portions 30g and the opening 30d are on the same line.

[0033] The present invention has been described based on the embodiments. These embodiments are illustrative, and it is understood by those skilled in the art that various modifications are possible in the combination of each component and each processing process, and such modifications are also within the scope of the present invention.

Explanation of Reference Numerals

[0034] 10 Vehicle lamp, 12 Lamp body, 14 Outer cover, 16 Lamp chamber, 18 First lamp unit, 20 Second lamp unit, 24 Heat sink, 26 Substrate, 28 LED, 29 Waiting-side connector, 30 Optical member.

Claims

1. A light source, a substrate on which the light source is mounted, a heat sink that supports the substrate, an optical functional unit that deflects light from the light source, a flange portion formed around the optical functional unit, and a lance portion provided on the flange portion, an optical member comprising: comprising The substrate and the optical member are fixed to the heat sink by the lance portion being inserted and locked into a lance insertion hole provided in the heat sink in a state where the substrate is sandwiched between the heat sink and the flange portion. A vehicle lamp characterized by that.

2. The flange portion includes a plurality of substrate pressing portions that protrude toward the substrate side, The vehicle lamp according to claim 1, wherein the substrate is biased toward the heat sink by the plurality of substrate pressing portions.

3. The substrate includes a connector that protrudes toward the optical member side, The vehicle lamp according to claim 1 or 2, wherein the flange portion includes an opening through which the connector is inserted.

4. In the flange portion, the opening is provided between two of the substrate pressing portions. The vehicle lamp according to claim 3, which depends on claim 2.

5. The flange portion includes a stepped portion, The vehicle lamp according to claim 1, wherein the lance portion is provided at a portion of the flange portion where the stepped portion is formed.

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