JP2013016332A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp capable of improving vibration absorption effect at a reflector support portion and simplifying the structure of a holder member.SOLUTION: When a reflector 4 vibrates accompanied with vibrations at the time of running of a vehicle, its vibration load is transmitted to a leaf spring part 31 of a lamp housing 2 through a pin 32 of the holder member 10 and the leaf spring part 31 is deflected and deformed to absorb the vibration load. The vibration absorption part 30 is constructed of these leaf spring part 31 and the pin 32, and a spring constant is arbitrarily established by adjustment of the plate thickness, length, area or the like of the leaf spring part 31 and vibration absorption effect can be improved.

Description

  The present invention relates to a vehicular lamp represented by a headlamp of an automobile.

  In a vehicular lamp such as a headlamp, the reflector is supported on the lamp housing so as to be tiltable, and an optical axis adjustment function is provided, whereby the reflector is tilted in the vertical direction or the horizontal direction to adjust the optical axis. It can be set appropriately.

  Among such reflector support structures, Patent Document 1 discloses a structure in which a spherical end portion of an output shaft of a tilting actuator on a lamp housing side is connected to a holder member on a reflector side. The holder member described above includes an elastically deformable contact portion that comes into contact with the inner surface of the lamp housing, and the contact portion is intended to provide a vibration absorbing function and a reflector load distributing function.

JP 2007-42288 A

  In the disclosed technique of Patent Document 1, a flexible contact portion is formed on a holder member that is mounted and fixed to a reflector. However, the holder member is disposed in a narrow portion where the reflector and the lamp housing are close to each other. Therefore, the holder member itself is small, and therefore the contact portion is also regulated small. For this reason, it is difficult to ensure a large amount of bending deformation of the contact portion, and the absorption function cannot be sufficiently exhibited for large vibrations.

  In addition, the structure in which the contact portion bends and deforms to absorb the vibration needs to be configured so that the holder member itself can withstand the vibration load, and it cannot be denied that the structure and modeling become complicated and the molding cost increases.

  Accordingly, the present invention provides a vehicular lamp that can enhance the vibration absorption effect at the reflector support portion and can have a simple structure for the connecting holder member.

  The vehicular lamp of the present invention has a structure in which the reflector is supported on the lamp housing so as to be tiltable by connecting the end of the lamp housing side shaft member to the reflector side holder member.

  And the leaf | plate spring part which protrudes below the connection part of the said holder member and the edge part of the said shaft member is formed in the said lamp housing, On the other hand, the end part contact | abuts the said leaf | plate spring part to the said holder member The main feature is that a vibration absorbing portion is constituted by these leaf spring portions and pins.

  The reflector tends to vibrate as the vehicle travels, but the vibration load of the reflector is transmitted to the leaf spring portion of the lamp housing via the pin of the holder member, and the leaf spring portion is bent and deformed. Absorbed.

  The vibration absorbing portion is composed of these leaf spring portions and pins, and the leaf spring portion is formed in the lamp housing, and the spring constant can be arbitrarily set by adjusting the plate thickness, length, area, etc. Therefore, the vibration absorption effect can be enhanced.

  Further, since the leaf spring portion can be provided so as to be able to bend and deform even in a narrow portion, it is not greatly restricted by molding, and the moldability of the lamp housing is not impaired.

  On the other hand, the holder member does not receive a large vibration load only by transmitting the vibration load of the reflector to the leaf spring portion by the pin. Therefore, it is sufficient to design with emphasis only on the connecting function between the reflector and the shaft member. For this reason, the structure of a holder member can be simplified, a moldability can be improved, and it can obtain advantageously in cost.

Front explanatory drawing of the vehicle lamp made into the object of this invention. Cross-sectional explanatory drawing which follows the AA line of FIG. 1 which shows the principal part of this invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  A vehicular lamp 1 according to the present embodiment shown in FIG. 1 includes a lamp housing 2 whose front side is open, an outer lens 3 that is sealed and attached to a front open portion of the lamp housing 2, and the lamp housing 2 and outer lens 3 And a reflector 4 disposed in the lamp chamber.

  A reflecting surface is formed on the inner surface of the reflector 4 by aluminum vapor deposition or the like, and the light emitted from the bulb 5 is reflected toward the outer lens 3 to irradiate the front of the lamp.

  The reflector 4 is supported by the lamp housing 2 so as to be tiltable at three points P1, P2 and P3 at the lower left and right sides and the upper left corner shown in FIG.

  In this embodiment, the lower left support point P1 and the upper left corner support point P2 in FIG. 1 are provided on a vertical line, and the support point P1 is a tilting fulcrum, and the support point P2 is vertically The optical axis adjustment input point for the direction. And the support point P3 of the lower right part is made into the optical axis adjustment input point of the left-right direction.

That is, by the optical axis adjustment input acts in the longitudinal direction on the support point P2 (the plane direction in FIG. 1), tilts the vertical direction line segment O ₁ of the reflector 4 is connecting the supporting points P1 and P3 as the center of rotation Thus, the vertical optical axis adjustment is performed. Further, by the optical axis adjustment input is applied to the front-rear direction to the support point P3 (the plane direction in FIG. 1), tilts in the lateral direction of the line segment O ₂ where the reflector 4 connecting the support points P1 and P2 as the center of rotation Thus, the optical axis adjustment in the left-right direction is performed.

  The support point P1 can be configured as a general-purpose ball joint structure including a ball shaft and a ball bearing that connect the lamp housing 2 and the reflector 4 to each other.

  On the other hand, as shown in FIG. 2, the support points P2 and P3 employ a connecting structure of the reflector-side holder member 10 and the lamp housing-side shaft member 20, and by moving the shaft member 20 back and forth in the front-rear direction. The optical axis adjustment input of the reflector 4 can be used.

  The reflector 4 is made of a lightweight metal such as synthetic resin or aluminum, and a holder fixing portion 6 that protrudes rearward from the back surface of the reflector 4 is integrally formed at a position corresponding to the support points P2 and P3. .

  The holder fixing portion 6 includes a holder fitting hole 6a that opens at the rear end thereof, and the holder member 10 is fitted and fixed to the holder fitting hole 6a.

  The holder member 10 is made of an appropriate synthetic resin material. For example, in the example shown in FIG. 2, a press-fit portion 10a is formed in a substantially first half portion, and a connecting portion 10b is formed in a substantially second half portion.

  The press-fit portion 10a has a plurality of engaging fins 11 formed on the outer periphery thereof in a plurality of stages in the axial direction and having a slightly larger diameter than the holder-fit hole 6a. The press-fit portion 10a is formed in the holder-fit hole 6a. By press-fitting, the engaging fins 11 are elastically deformed and brought into close contact with the inner peripheral surface of the holder fitting hole 6a, so that they are securely fixed.

  The connecting portion 10b is configured as a socket portion for inserting and engaging the spherical joint head portion 21 at the end portion of the shaft member 20, and the socket portion is provided with a folded piece 12 for preventing the joint head portion 21 from coming off.

  The shaft member 20 uses an adjustment screw disposed on the rear wall of the lamp housing 2, and generates an optical axis adjustment input of the reflector 4 by moving the adjustment screw 20 forward or backward by a manual operation or an actuator. Let

  Here, in the present embodiment, as shown in FIG. 2, the reflector 4 is vibrated at the above-mentioned support point P3 portion, that is, the support point portion near the bottom of the reflector 4 as the vehicle travels. When it occurs, the vibration absorbing portion 30 is configured to absorb this.

  The vibration absorbing portion 30 includes a leaf spring portion 31 formed integrally with the lamp housing 2 and a pin 32 that protrudes downward from the holder member 10 and whose lower end abuts (elastically contacts) on the surface of the leaf spring portion 31. And it consists of.

  The leaf spring portion 31 is spaced apart from the bottom wall of the lamp housing 2 by a required dimension, and is disposed so as to project substantially horizontally below the connecting portion between the holder member 10 and the end portion of the shaft member 20.

  On the other hand, the pin 32 protrudes substantially perpendicularly to the lower surface of the connecting portion 10 b (socket portion) of the holder member 10.

  Of course, the leaf spring portion 31 is formed to have an overhang length and a width that can sufficiently support the pin 32 when the optical axis is adjusted by the forward and backward movement of the shaft member 20.

  According to the vehicular lamp 1 of the present embodiment having the above-described configuration, when the reflector 4 vibrates with the vibration during traveling of the vehicle, the vibration is absorbed by the vibration absorbing unit 30.

  Thereby, the vibration of the reflector 4 is suppressed, the shake of the optical axis is avoided, and the illumination effect can be enhanced.

  Specifically, the vibration load of the reflector 4 is transmitted to the leaf spring portion 31 of the lamp housing 2 via the pin 32 of the holder member 10, and is absorbed by the leaf spring portion 31 being bent and deformed.

  In addition to the vibration suppressing effect of the reflector 4, the load of the reflector 4 can be distributed to the lamp housing 2 via the pin 32 and the leaf spring portion 31. As a result, the load applied to the support points P1, P2, and P3 can be reduced, and the strength and rigidity of the support points P1, P2, and P3 can be sufficiently ensured.

  Here, in particular, the vibration absorbing portion 30 is constituted by a leaf spring portion 31 integrally formed on the lamp housing 2 and a pin 32 integrally formed on the holder member 10. The spring constant can be arbitrarily set by adjusting the area and the like. Therefore, the vibration absorption effect of the reflector 4 by the vibration absorber 30 can be enhanced.

  Further, since the leaf spring portion 31 can be provided so as to be able to bend and deform even in a narrow portion, it is not greatly restricted by molding, and the moldability of the lamp housing 2 is not impaired.

  In particular, in the present embodiment, the vibration absorbing portion 30 is set at the support point P3 in the vicinity of the bottom of the reflector 4, but such a portion where the distance between the reflector 4 and the bottom wall of the lamp housing 2 becomes very narrow. Even so, the leaf spring portion 31 can be easily set. Accordingly, the degree of freedom in design can be expanded, and the vibration absorbing portion 30 can be set easily in the vicinity of the bottom of the reflector where the structure is most desirable for vibration absorption and reflector load dispersibility. Therefore, the vibration absorption of the reflector 4 can be further improved. The effect can be enhanced.

  On the other hand, the holder member 10 simply transmits the vibration load of the reflector 4 to the leaf spring portion 31 by the pin 32 and does not receive a large vibration load. Therefore, it is sufficient to design with emphasis only on the function of connecting the reflector 4 and the shaft member (adjustment screw) 20. For this reason, the structure of the holder member 10 can be simplified, the moldability can be improved, and the cost can be advantageously obtained.

  In the above-described embodiment, the example in which the vibration absorbing portion 30 is provided at the support point P3 near the bottom of the reflector 4 is shown. However, the vibration absorber 30 may be provided at the support point P2 near the top of the reflector 4.

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Lamp housing 3 ... Outer lens 4 ... Reflector 5 ... Valve 6 ... Holder fixing part 10 ... Holder member 20 ... Shaft member 30 ... Vibration absorption part 31 ... Plate spring part 32 ... Pins P1, P2, P3 ... support point (support part)

Claims (2)

The end of the shaft member on the lamp housing side is connected to the holder member on the reflector side, and the reflector is tiltably supported on the lamp housing,
On the lamp housing, while forming a leaf spring portion projecting below the connecting portion between the holder member and the end portion of the shaft member,
The holder member is provided with a pin projecting an end portion against the leaf spring part,
A vehicular lamp characterized in that a vibration absorbing portion is constituted by the leaf spring portion and the pin. 2. The vehicle according to claim 1, wherein a support portion by the holder member and the shaft member is set in the vicinity of a bottom portion of the reflector, and the vibration absorbing portion is disposed in a support portion in the vicinity of the bottom portion. Light fixture.

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