JP5506449B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp.

  2. Description of the Related Art Conventionally, as a vehicular lamp such as an automobile headlight, a lamp using a semiconductor light source such as an LED (Light Emitting Diode) is known. In such a vehicular lamp, the semiconductor light source is held by a holding member while being mounted on a substrate, and the holding member is fastened and fixed to the lamp body by a screw member (see, for example, Patent Document 1). The screw member for fixing the holding member is firmly fastened so as not to loosen due to vibration or the like during driving of the vehicle.

JP 2009-205834 A

However, in the above conventional vehicle lamp, the holding member may be scraped by the screw member when the screw member is fastened.
Specifically, as shown in FIG. 5A, when the seat surface 102a of the holding member 102 is pushed by the head portion 101a of the screw member 101 in the process of fastening the screw member 101, the inner peripheral edge of the seat surface 102a. Since the corner portion 102b tends to be deformed in a direction protruding from the seating surface 102a, the corner portion 102b is strongly rubbed and scraped off by the head portion 101a. In particular, as shown in FIG. 5B, when the crushing margin is provided by reducing the area of the seating surface 102a of the holding member 102 in order to suppress the looseness of the screw member 101, the inner and outer peripheral edges of the seating surface 102a. Since the corner portion 102b of the first portion is to be deformed more greatly, a larger amount is scraped off.
Then, the shavings of the holding member 102 may enter the optical path of the semiconductor light source and the projected image may be disturbed.

  SUMMARY An advantage of some aspects of the invention is that it provides a vehicular lamp that can prevent a projection image from being disturbed by shavings of a holding member.

In order to solve the above-mentioned problem, an invention according to claim 1 is for a vehicle comprising: a semiconductor light source mounted on a board; and a holding member that holds the board and is fastened and fixed to a lamp body by a screw member. In the lamp,
The holding member has a chamfered portion formed on the inner peripheral edge of the seat surface with which the lower surface of the head of the screw member abuts .
The seating surface is raised,
The chamfer is characterized that you have been formed on the inner peripheral edge and the outer peripheral edge of the seat surface.

The invention according to claim 2 is the vehicle lamp according to claim 1 ,
The chamfered portion is formed in an arc shape.

The invention according to claim 3 is the vehicle lamp according to claim 1 or 2 ,
The holding member is made of resin.

  According to the first aspect of the present invention, since the holding member fastened and fixed to the lamp body by the screw member has the chamfered portion formed on the inner peripheral edge of the seat surface on which the lower surface of the head of the screw member abuts, When the screw member is fastened, the inner peripheral edge of the seating surface of the holding member is not deformed to the head side of the screw member from the seating surface. Thereby, it can prevent that a holding member is shaved by the head of a screw member, and can prevent generation | occurrence | production of shavings by extension. Accordingly, it is possible to prevent the projection image from being disturbed by the shavings entering the optical path of the semiconductor light source.

According to the invention described in claim 1 , since the chamfered portion is formed on the inner and outer peripheral edges of the raised seat surface, even when the crushing margin is provided by raising the seat surface. When the screw member is fastened, the inner peripheral edge and the outer peripheral edge of the seating surface of the holding member are not deformed to the head side of the screw member with respect to the seating surface. Thereby, it can prevent that a holding member is shaved by the head of a screw member, and can prevent generation | occurrence | production of shavings by extension. Therefore, it is possible to prevent the projection image from being disturbed by shavings entering the optical path of the semiconductor light source while providing a crushing margin to suppress loosening of the screw member.

According to the second aspect of the present invention, since the chamfered portion is formed in an arc shape, the stress concentration at the chamfered portion when the seating surface is deformed compared to the case where the chamfered portion is formed on a straight line. It is possible to relax and suppress deformation of the chamfered portion.

It is a perspective view of the vehicular lamp in an embodiment. It is principal part sectional drawing of a vehicle lamp. It is a perspective view of a holding member. (A) It is sectional drawing of a holding member, (b) It is the figure which expanded the A section of (a). It is a figure which shows the state by which the conventional holding member was fastened and fixed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Configuration of vehicle lamp>
FIG. 1 is a perspective view of a vehicular lamp 1 according to the present embodiment, and FIG. 2 is a cross-sectional view of a main part of the vehicular lamp 1.
As shown in FIG. 1, the vehicular lamp 1 includes two projection lenses 2 arranged side by side. This vehicular lamp 1 is a projector-type vehicular headlamp that irradiates light projected from these two projection lenses 2 to different ranges. In the present embodiment, the vehicular lamp 1 is used for a front beam for a low beam. It is a lighting.

As shown in FIG. 2, behind the projection lens 2, a shade 3 for blocking incidence of light within a predetermined range to the projection lens 2 and a reflector 4 having a reflection surface 4 a are disposed. The reflecting surface 4a of the reflector 4 is a free-form surface based on a spheroidal surface, and a light source 5 is disposed at a substantially first focal position of the reflecting surface 4a.
With such a configuration, the light emitted from the light source 5 is reflected forward by the reflecting surface 4a of the reflector 4, and a predetermined range of light is blocked by the shade 3 and then irradiated to the front of the vehicle through the projection lens 2. Is done.

  The light source 5 is a semiconductor light source having a semiconductor light emitting element such as an LED (Light Emitting Diode), and is mounted on the substrate 6. The substrate 6 is held by a holding member 7 and is fixed to the bracket 8 via the holding member 7 and is connected to the wiring cable 9.

<Configuration of holding member>
3 is a perspective view of the holding member 7, FIG. 4A is a cross-sectional view of the holding member 7, and FIG. 4B is an enlarged view of a portion A in FIG. 4A. .
As shown in FIG. 3 and FIG. 4A, the holding member 7 is a resin member formed symmetrically so that the substrate 6 and the wiring cable 9 are held and connected to the left and right respectively. It is configured. The holding member 7 is formed in a substantially L shape in side view. Two cable holders 71 that respectively hold the wiring cables 9 are juxtaposed on the left and right in the vertical portion of the holding member 7. On the other hand, on the horizontal portion of the holding member 7, a bottom plate 72 and a fixed plate 73 are juxtaposed in the vertical direction with a gap therebetween. A gap between the bottom plate 72 and the fixed plate 73 serves as an insertion portion 74 into which the substrate 6 is inserted. With the substrate 6 inserted and fixed in the insertion portion 74, the bottom plate 72 is fixed to the substrate 6. The lower surface is supported, and the fixed plate 73 is configured to press the upper surface of the substrate 6. Further, on both sides of the cable holders 71, 71, there are provided engaging portions 75 that engage with the engaging claws 61 of the substrate 6 when the substrate 6 is inserted into the insertion portion 74.

  The fixing plate 73 is formed to be longer to the left and right than the bottom plate 72, and insertion holes 73a through which the screw members 10 are inserted are formed at both left and right ends thereof. When the board 6 is inserted into the insertion part 74 and the engagement part 75 and the engagement claw 61 are engaged with each other, the insertion hole 73a is arranged so that the center axis substantially coincides with the through hole 6a formed in the board 6. Is formed. In this manner, the screw member 10 is inserted into the insertion hole 73a and the through hole 6a in a state where the central axes of the insertion hole 73a of the fixing plate 73 and the through hole 6a of the substrate 6 are substantially coincided with each other. The substrate 6 and the holding member 7 are fixed to the bracket 8 by fastening to a portion (not shown).

  As shown in FIG. 4B, a protruding portion 73b in which the upper surface of the fixing plate 73 is raised is provided at the peripheral portion of the insertion hole 73a. The top surface of the raised portion 73 b is a seat surface 73 c that comes into contact with the lower surface of the head portion 10 a of the screw member 10 when the screw member 10 is fastened, that is, the seat surface 73 c is the fixing plate 73. It is higher than the rest of the top surface. Further, the raised portion 73 b is formed to have an outer diameter comparable to that of the head portion 10 a of the screw member 10. The raised portion 73b constitutes a crushing margin that is pushed by the head portion 10a of the screw member 10 and is crushed in the fastening direction when the screw member 10 is fastened, and functions in the same manner as a washer to suppress loosening of the screw member 10. To do.

  A chamfered portion R is formed on the inner and outer peripheral edges of the seat surface 73c. The chamfered portion R is formed in an arc shape so as to smoothly connect the inner and outer peripheral surfaces of the raised portion 73b and the seat surface 73c. By providing such a chamfered portion R, when the screw member 10 is fastened with a predetermined torque, the chamfered portion R is deformed and protrudes toward the head 10a side of the screw member 10 from the seat surface 73c. Can be prevented. In the case where the raised portion 73b is not provided, the chamfered portion R may be formed only on the inner peripheral edge of the seating surface 73c.

<Action and effect>
According to the vehicle lamp 1 described above, the holding member 7 fastened and fixed to the bracket 8 by the screw member 10 has the chamfered portion R on the inner peripheral edge of the seat surface 73c with which the lower surface of the head portion 10a of the screw member 10 abuts. Thus, when the screw member 10 is fastened, the inner peripheral edge of the seat surface 73c of the holding member 7 is not deformed toward the head 10a side of the screw member 10 with respect to the seat surface 73c. Thereby, it can prevent that the holding member 7 is shaved by the head part 10a of the screw member 10, and can prevent generation | occurrence | production of shavings by extension. Accordingly, it is possible to prevent the projection image from being disturbed by the shavings entering the optical path of the light source 5.

  Further, since the chamfered portion R is formed on the outer peripheral edge in addition to the inner peripheral edge of the seating surface 73c, even if the crushing portion (the raised portion 73b) is provided by raising the seating surface 73c, the screw member The inner peripheral edge and the outer peripheral edge of the seating surface 73c of the holding member 7 are not deformed toward the head 10a side of the screw member 10 with respect to the seating surface 73c. Thereby, it can prevent that the holding member 7 is shaved by the head part 10a of the screw member 10, and can prevent generation | occurrence | production of shavings by extension. Accordingly, it is possible to prevent the projection image from being disturbed by the shavings entering the optical path of the light source 5 while providing a crushing margin to suppress loosening of the screw member 10.

Further, since the chamfered portion R is formed in an arc shape, the stress concentration in the chamfered portion R when the seat surface 73c is deformed is reduced compared with the case where the chamfered portion R is formed in a straight line, and the chamfered portion R The deformation of the portion R can be suppressed.
Further, since the chamfered portion R is formed so as to smoothly connect the inner and outer peripheral surfaces of the raised portion 73b and the seating surface 73c, the stress concentration in the chamfered portion R can be further reduced, and the chamfered portion R can be further reduced. The deformation of the portion R can be further suppressed.

  It should be noted that the present invention should not be construed as being limited to the above-described embodiment, and of course can be modified or improved as appropriate.

  For example, in the above-described embodiment, the chamfered portions R formed on the inner and outer peripheral edges of the seat surface 73c are arcuate, but when the screw member 10 is fastened with a predetermined torque, the chamfered portion R is more than the seat surface 73c. Any other shape such as a straight line may be used as long as it does not protrude toward the head 10a side of the screw member 10.

1 Vehicle lamp 5 Light source (semiconductor light source)
6 Substrate 6a Through-hole 7 Holding member 8 Bracket (lamp body)
10 Screw member 10a Head 73c Seat surface R Chamfer

Claims (3)

In a vehicle lamp comprising: a semiconductor light source mounted on a substrate; and a holding member that holds the substrate and is fastened and fixed to the lamp body by a screw member.
The holding member has a chamfered portion formed on the inner peripheral edge of the seat surface with which the lower surface of the head of the screw member abuts .
The seating surface is raised,
The chamfer vehicle lamp you characterized in that formed on the inner peripheral edge and the outer peripheral edge of the seat surface. The vehicular lamp according to claim 1 , wherein the chamfered portion is formed in an arc shape. The vehicular lamp according to claim 1 or 2, wherein the holding member is characterized by a resin.

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