JP2013131409A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of preventing strong light leakage from a lens peripheral edge toward a front side and enhancing external appearance without addition of a components, and moreover enhancing adhesive strength between a lens and a holder.SOLUTION: In a vehicular lighting fixture provided with a projection lens (a lens) 3 integrally molded by two-color molding and a holder 2 for holding the lens, an adhesion face between the projection lens 3 and the holder 2 is made an inclined face 5 inclined diagonally in a side view. For example, the adhesion face between the projection lens 3 and the holder 2 is made an inclined face 5 which is inclined forward diagonally downward in a side view. Or, wavy concavo-convex shapes which are mutually engaged at the adhesion face between the projection lens 3 and the holder 2 are formed. Further, the adhesion face between the projection lens 3 and the holder 2 is made an inclined face forward diagonally upward in a side view and moreover wavy concavo-convex shapes which are mutually engaged with at the inclined face are formed.

Description

  The present invention relates to a vehicular lamp including a joining structure of a lens integrally formed by two-color molding and a holder that holds the lens.

  For the headlamps arranged on the left and right sides of the front end of the vehicle, for example, projector types as shown in FIGS. 6 to 8 may be used. 6 is a front view of the headlamp, FIG. 7 is a cross-sectional view taken along the line CC of FIG. 6, and FIG. 8 is an enlarged detail view of a portion D of FIG.

  In the projector-type headlamp 101 shown in FIGS. 6 and 7, a projection lens 103 is held at the front end of a cylindrical holder (bezel) 102, and a light source is behind the projection lens 103 in the holder 102. A certain LED (light emitting diode) 104 is arranged. Here, the projection lens 103 is made of a transparent resin, and the holder 102 is made of a light-impermeable black resin, for example, but both are integrally formed by two-color molding. As shown in detail in FIG. 8, a convex portion 103 a having a V-shaped cross section is formed on the joint surface of the projection lens 103, and a concave portion 102 a having a V-shaped cross section is formed on the joint surface of the holder 102. By fitting these convex portions 103a and concave portions 102a, the adhesive area between the projection lens 103 and the holder 102 is increased, and the adhesive strength between them is increased.

  By the way, Patent Document 1 proposes a two-color molding of a lens in a vehicle lamp, and Patent Document 2 discloses an opaque coating on at least a part of the surface of the flange-shaped portion of the lens in order to prevent light leakage in the combination lamp. A configuration for forming a film has been proposed.

  Patent Document 3 proposes a configuration in which a lens that is laser-welded in a vehicular lamp and a joint convex portion and a joint concave portion that are fitted to the housing are formed.

Japanese Patent Laid-Open No. 11-086604 JP 7-320506 A JP 2004-066331 A

  In the joint structure formed by two-color molding of the projection lens 103 of the headlamp 101 and the holder 102 shown in FIGS. 6 to 8, miscellaneous light that is directed to other than the main light emitting portion of the projection lens 103 out of the light emitted from the LED 104. (Uncontrolled light) L is reflected by the inner surface of the peripheral edge of the projection lens 103 as shown in FIG. 3, and the reflected light is reflected again by the slope of the convex portion 103a formed at the joint portion of the projection lens 103 and forward. Exit to. For this reason, there is a problem that strong light leaks from the periphery of the projection lens 103, and the leaked light hinders the appearance of the headlamp 101. In order to solve this problem, conventionally, the outer peripheral edge of the projection lens 103 has been covered with a cover, but there is a problem that the number of parts and the number of assembling steps increase.

  Further, in the conventional joining structure of the projection lens 103 and the holder 102 of the headlamp 101, since the adhesion area between the two is small, there is a possibility that the adhesion strength is insufficient particularly when the weight of the projection lens 103 is large.

  Further, when the lens is bonded to the holder by two-color molding and the both are integrally molded, there is a problem that the joint is liable to peel off.

  The present invention has been made in view of the above problems, and the object of the present invention is to prevent strong light leakage from the lens periphery to the front side without adding parts, to improve the appearance and to bond the lens and the holder. An object of the present invention is to provide a vehicular lamp that can increase the strength.

  In order to achieve the above object, a first aspect of the present invention provides a vehicular lamp including a lens integrally formed by two-color molding and a holder for holding the lens, and a joint surface between the lens and the holder is viewed from a side. It is characterized by a slanting slope.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the joint surface between the lens and the holder is an inclined surface that is inclined downward toward the front in a side view.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, wavy irregularities that fit together are formed on a joint surface between the lens and the holder.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the joining surface between the lens and the holder is a slope that rises obliquely toward the front in a side view, and the wavy shapes that are fitted together on the slope. It is characterized by forming irregularities.

  According to the first and second aspects of the present invention, the miscellaneous light traveling from the light source to the part other than the main light emitting portion of the lens is reflected by the inclined surface that is the joint surface between the lens and the holder, and the inclined surface is inclined forward in a side view. In the case of a slope that goes down, the reflected light reflected by this reflecting surface goes outward in the radial direction of the lens and does not go forward, so strong light leaks from the periphery of the lens and the appearance of the headlamp Does not inhibit sex. And since it is not necessary to add the cover for preventing the light leakage from the lens periphery, the number of parts and the number of assembling steps can be reduced, and the cost of the headlamp can be reduced.

  Further, since the joint surface between the lens and the holder is an inclined surface, the adhesion area between the two is increased and the adhesion strength is increased.

  According to the invention described in claim 3, since the wavy irregularities that fit each other are formed on the joint surface between the headlamp lens and the holder, the miscellaneous light that travels from the light source to other than the main light emitting portion of the lens is generated between the lens and the holder. The light is diffused by the wavy irregularities formed on the joint surface to weaken the intensity, and the light travels outward in the radial direction of the lens and does not travel forward, causing strong light leakage from the periphery of the lens. It is reliably prevented and the appearance of the headlamp is enhanced.

  According to the invention of claim 4, since the joint surface between the headlamp lens and the holder is a slope that rises obliquely toward the front in a side view, and the wavy unevenness that fits the slope is formed. The miscellaneous light that travels from the light source to other than the main light emitting part of the lens is diffused by the wavy irregularities formed on the joint surface between the lens and the holder, the intensity thereof is weakened, and strong light does not leak from the periphery of the lens, The appearance of the headlamp is improved. And since the adhesive area of both increases further according to the wavy unevenness | corrugation formed in the joint surface of a lens and a holder, the adhesive strength of a lens and a holder is raised.

It is a front view of the vehicle lamp which concerns on Embodiment 1 of this invention. It is the sectional view on the AA line of FIG. FIG. 3 is an enlarged detail view of B in FIG. 2. It is a figure similar to FIG. 3 which shows the joining structure of the lens and holder of the vehicle lamp which concern on Embodiment 2 of this invention. It is a figure similar to FIG. 3 which shows the joining structure of the lens and holder of the vehicle lamp which concern on Embodiment 3 of this invention. It is a front view of the vehicle lamp provided with the conventional junction structure. It is CC sectional view taken on the line of FIG. It is the D section enlarged detail drawing of FIG.

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

<Embodiment 1>
1 is a front view of a vehicular lamp according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is an enlarged detail view of B of FIG. The vehicle lamp 1 according to the present invention is a headlamp provided on the left and right of the front part of the vehicle. The headlamp 1 is of a projector type and is projected onto the front end of a cylindrical holder (bezel) 2. 3 is held, and an LED 4 as a light source is disposed behind the projection lens 3 in the holder 2. Here, the projection lens 3 is made of a transparent resin, and the holder 2 is made of a light-impermeable black resin, for example, but both are integrally molded by two-color molding.

  Therefore, the outer peripheral edge of the inner surface of the projection lens 3 is joined to the front end surface of the holder 2 and the projection lens 3 and the holder 2 are integrated. In this embodiment, however, as shown in detail in FIG. A joint surface between the lens 3 and the holder 2 is a slope 5 that is slanted downward in a side view.

  Thus, in the present embodiment, as described above, the joint surface between the projection lens 3 and the holder 2 is the slope 5 that obliquely descends forward in a side view. As shown in FIG. 3, the miscellaneous light L that is directed to other than the light emitting part is reflected by the inner surface of the projection lens 3, and the reflected light is reflected by the inclined surface 5 that is a joint surface between the projection lens 3 and the holder 2. Since the lens 3 faces radially outward and hardly moves forward, strong light does not leak from the peripheral edge of the projection lens 3, and the appearance of the headlamp 1 is not hindered by light leakage. . For this reason, it is not necessary to add a cover that has been conventionally required to prevent light leakage from the periphery of the projection lens 3, and the number of parts and the number of assembling steps are reduced, thereby reducing the cost of the headlamp 1.

  Further, in the present embodiment, since the joint surface between the projection lens 3 and the holder 2 is the inclined surface 5, there is also an effect that the adhesive area between both is increased and the adhesive strength is increased.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIG.

FIG. 4 is a view similar to FIG. 3 showing the joint structure between the lens and the holder of the vehicular lamp according to Embodiment 2 of the present invention. In this embodiment, the joint surface between the projection lens 3 and the holder 2 is shown. Is formed as a slope 5 that is slanted downward in a side view, and wave-like irregularities (concave part 6 a and convex part 6 b) 6 that are fitted to each other are formed on the slope 5.

  Therefore, according to the present embodiment, the miscellaneous light that travels from the LED 4 to other than the main light emitting portion of the projection lens 3 is diffused by the wavy unevenness 6 formed on the slope 5 that is the joint surface between the projection lens 3 and the holder 2. As the intensity of the light is reduced, the light travels outward in the radial direction of the projection lens 3 and hardly travels forward, so that strong light leakage from the periphery of the projection lens 3 is reliably prevented. Thus, the appearance of the headlamp 1 is improved.

  Also in the present embodiment, since a cover for preventing light leakage is unnecessary, the number of parts and the number of assembling steps can be reduced, the cost of the headlamp 1 can be reduced, and the projection lens 3 and the holder 2 can be reduced. The wavy unevenness 6 formed on the inclined surface 5 that is the bonding surface further increases the bonding area between the two, and thus the effect of increasing the bonding strength between the projection lens 3 and the holder 2 is obtained.

<Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIG.

  FIG. 5 is a view similar to FIG. 3 showing the joining structure between the lens of the vehicular lamp and the holder according to Embodiment 3 of the present invention. In this embodiment, the joining surface of the projection lens 3 and the holder 2 is shown. It is characterized by a slope 5 ′ that rises obliquely forward as viewed from the side, and wave-like irregularities (concave portion 6a and convex portion 6b) 6 that are fitted to the slope 5 ′.

  Therefore, according to the present embodiment, the miscellaneous light L that travels from the LED 4 to other than the main light emitting portion of the projection lens 3 is the wavy irregularities 6 formed on the inclined surface 5 ′ that is the joint surface between the projection lens 3 and the holder 2. Since the intensity of the light is diffused by the reflection of the light and its intensity is weakened, strong light does not leak forward from the periphery of the projection lens 3 and the appearance of the headlamp 1 is improved. Then, since the bonding area between the projection lens 3 and the holder 2 is further increased due to the wavy unevenness 6 formed on the inclined surface 5 ′ that is the joint surface between the projection lens 3 and the holder 2, the bonding strength between the projection lens 3 and the holder 2 is increased.

  Also in the present embodiment, since a cover for preventing light leakage is unnecessary, the number of parts and assembly man-hours can be reduced, and the cost of the headlamp 1 can be reduced. Similar effects can be obtained.

  In the above embodiment, an LED is used as a light source. However, the present invention is similarly applied to a headlight using an arbitrary light source other than an LED, such as an LD (laser diode). Of course, it is possible. Of course, the present invention is applicable not only to the headlamp but also to other vehicle lamps such as a tail lamp and a stop lamp.

1 Headlamp (vehicle lamp)
2 Holder 3 Projection lens (lens)
4 LED
5,5 'slope (joint surface)
6 Wave-like unevenness 6a Concavity 6b Convex L Light

Claims (4)

In a vehicular lamp including a lens that is integrally molded by two-color molding and a holder that holds the lens,
A vehicular lamp characterized in that a joint surface between the lens and the holder is an inclined surface inclined obliquely in a side view.   The vehicular lamp according to claim 1, wherein a joint surface between the lens and the holder is an inclined surface that obliquely descends forward in a side view.   The vehicular lamp according to claim 1, wherein wavy irregularities that fit together are formed on a joint surface between the lens and the holder. 2. The vehicle according to claim 1, wherein a joint surface between the lens and the holder is formed as an inclined surface that rises obliquely toward the front in a side view, and wave-shaped unevenness that fits to the inclined surface is formed. Light fixture.

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