JP2019204630A - Lamp unit of vehicle - Google Patents

Abstract

To improve load absorption performance in a lamp unit of vehicle when a collision load is applied.SOLUTION: A lamp unit of a vehicle comprises a housing 21 in which an opening 21h is formed on a front side, an outer lens 23 blocking the opening 21h of the housing 21, a light source device 30 housed in a space formed by the outer lens 23 and the housing 21, and a design member 40 provided around a light irradiation part 33 of the light source device 30 in the space. Portions 45 and 43 of the design member 40 is formed so as to be more fragile than another portion 48 of the design member 40.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lamp unit for a vehicle.

  A technique related to a headlamp unit of a vehicle is described in Patent Document 1. The headlamp unit of Patent Document 1 includes a housing having an opening formed on the front side, an outer lens that closes the opening of the housing, a light source device housed in the housing, and a light irradiation unit of the light source device. And a reflector provided. The reflector is generally a resin injection-molded product, and is formed in a size that covers the entire inner wall surface of the housing.

JP-A-9-147604

  For example, when a collision load is applied to the headlamp unit, the outer lens is first broken, and the collision load continues to be applied to the reflector and the light source device. Here, the reflector is an injection-molded product of resin as described above, and is formed in a size that entirely covers the inner wall surface of the housing. Accordingly, when the reflector is injection-molded with the above-mentioned size, a thickness of several millimeters is generally required. For this reason, the intensity | strength of the said reflector is comparatively high and it becomes difficult for the said reflector to fracture | rupture, deform | transform, etc. with the said collision load. That is, load absorption performance in the reflector portion is low.

  The present invention has been made to solve the above problems, and an object of the present invention is to improve load absorption performance in a lamp unit of a vehicle when a collision load is applied.

  The above-described problems are solved by each invention. According to a first aspect of the present invention, there is provided a housing having an opening formed on a front surface side, an outer lens that closes the opening of the housing, a light source device that is housed in a space formed by the outer lens and the housing, A lamp unit of a vehicle including a design member provided around a light irradiation unit of the light source device, wherein a part of the design member is formed more fragile than the other part of the design member.

  According to the present invention, a part of the design member is formed more fragile than the other part of the design member. For this reason, when the collision load is applied to the outer lens of the lamp unit, the outer lens is broken, and when the collision load is applied to the design member, the design member is broken or deformed by the function of some of the weak parts. It becomes easy to do. That is, since the design member is easily broken or deformed by receiving a collision load, the absorption performance of the collision load is improved.

  According to 2nd invention, a part of part which opposes an outer lens in the design member is formed weakly. That is, since the part which is easy to receive a collision load in the design member is formed weakly, the absorption efficiency of the collision load is improved.

  According to the third invention, a part of the design member is formed with a substantially uniform thickness dimension with a thickness dimension set smaller than the other part of the design member.

  According to the fourth invention, a part of the design member is a separate member from the other part of the design member, and one of the design members is located at a boundary position between the part of the design member and the other part of the design member. The part is connected to the other part of the design member from the rear side. For this reason, when the lamp unit receives a collision load from the front side of the vehicle, a part of the design member is easily deformed or detached from the other side of the design member to the rear side.

  According to 5th invention, a part of design member is provided in the circumference | surroundings of the said light irradiation part in front of the said light source cover, the light source cover provided in the circumference | surroundings of the light irradiation part in the position of the light source device, And a fragile cover connected to the other part.

  According to the present invention, the load absorption performance of the vehicle lamp unit when a collision load is applied is improved.

It is the model perspective view which looked at the vehicle provided with the lamp unit which concerns on Embodiment 1 of this invention from the front. It is a model longitudinal cross-sectional view (II-II arrow sectional drawing of FIG. 1) of the said lamp unit. FIG. 2 is a schematic exploded perspective view of the lamp unit. It is a front view of the extension of the lamp unit. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4. It is VI-VI arrow sectional drawing of FIG. FIG. 7 is a sectional view taken along arrow VII-VII in FIG. 4. FIG. 5 is a cross-sectional view taken along arrow VIII-VIII in FIG. 4.

Embodiment 1
Hereinafter, the lamp unit according to Embodiment 1 of the present invention will be described with reference to FIGS. The lamp unit according to this embodiment is a headlamp unit 20 of a vehicle 10 as shown in FIG. Here, front and rear, right and left, and upper and lower shown in the figure correspond to front and rear, right and left, and top and bottom of the vehicle 10 including the headlamp unit 20 according to the present embodiment.

<About the configuration outline of the headlamp unit 20>
The headlamp unit 20 is a lamp of the same specification used in a pair of left and right, and is formed symmetrically. For this reason, in FIGS. 2 to 8, the left headlamp unit 20 is representatively described. As shown in FIG. 2, the headlamp unit 20 includes a housing 21 having an opening 21 h formed on the front side, and a lid-shaped outer lens 23 that closes the opening 21 h of the housing 21. Then, the lens edge 23f of the outer lens 23 is fitted to the opening edge 21e of the housing 21, whereby the outer lens 23 and the housing 21 are configured in a sealed container shape. A breathing hole (not shown) is provided in the rear wall 21b (bottom wall) of the housing 21.

  As shown in FIGS. 2 and 3, the headlamp unit 20 is provided around a light source device 30 housed in a space formed by a housing 21 and an outer lens 23, and a light irradiation lens 33 of the light source device 30. A design member 40 is provided. The light source device 30 is a light source device using an aspheric lens structure (PES (Polaric Ellipsoid System)). As shown in FIG. 2 and the like, the light source device 30 includes a convex light irradiation lens 33 for irradiating light from a light source (not shown) forward. A bracket (not shown) of the light source device 30 is attached to the rear wall portion 21b of the housing 21 so that the optical axis can be adjusted.

<About the design member 40 of the headlamp unit 20>
The design member 40 is a decorative reflector that hides the interior of the light source device 30 and the housing 21 excluding the light irradiation lens 33 from the outside, and is a resin injection-molded product. As illustrated in FIGS. 2 to 4, the design member 40 includes a light source cover 43, an extension 45, and an extension base material 48. As shown in FIG. 2, the light source cover 43 is a decorative reflection cover that covers the periphery of the light irradiation lens 33 of the light source device 30, and includes a lens opening 43h through which the light irradiation lens 33 is inserted (FIG. 2). (See 3 etc.). Here, the light source cover 43 may be a size that can cover the periphery of the light irradiation lens 33 of the light source device 30 and is relatively small. For this reason, when the resin is injection-molded, the thickness can be reduced to, for example, about 1.5 mm. When the light source cover 43 is formed of a film material, the thickness can be reduced to, for example, about 0.5 mm. Here, as a material of the light source cover 43, polycarbonate (PC) or the like is preferably used.

  As shown in FIGS. 2 to 4, the extension 45 of the design member 40 covers the periphery of the light irradiation lens 33 of the light source device 30 in front of the light source cover 43, and the left end of the substantially upper half of the opening 21 h of the housing 21. It is comprised so that the part except a part may be covered. That is, as shown in FIG. 4, the extension 45 is formed in a substantially square shape and includes an upper side portion 45 u, a right side portion 45 r, a lower side portion 45 d, and a left side portion 45 f, and at a position facing the back surface of the outer lens 23. A central upper portion of the housing 21 is provided so as to cover it.

  Further, as shown in FIG. 4 and the like, the extension 45 is formed with a substantially square opening 45k at a position corresponding to the light irradiation lens 33 and the light source cover 43 of the light source device 30. Therefore, the light source cover 43 and the light irradiation lens 33 of the light source device 30 can be seen from the outside through the opening 45k of the extension 45. Here, the extension 45 may be a size that can cover the center upper portion of the housing 21, and thus is relatively small. For this reason, when the resin is injection-molded, the thickness can be reduced to, for example, about 1.5 mm. When the extension 45 is formed from a film material, the thickness can be reduced to, for example, about 0.5 mm. Here, as a material of the extension 45, polycarbonate (PC) or the like is preferably used.

  As shown in FIGS. 3 and 4, the extension base material 48 of the design member 40 covers substantially the lower half and the left end of the opening 21 h of the housing 21, and the lower side 45 d and the left side 45 f of the periphery of the extension 45. It is comprised so that it can support. That is, the extension base material 48 is formed in a substantially L shape from a rectangular portion 48x that covers the lower half of the housing 21 and a protruding portion 48z that protrudes upward at the left end portion of the rectangular portion 48x and covers the left end portion of the housing 21. Has been. The extension 45 is fitted into a notch-like portion formed on the right side of the protrusion 48z of the extension base material 48. That is, the lower side portion 45d and the left side portion 45f of the extension 45 are connected to the notch upper side portion 48u and the notch vertical side portion 48t of the notched portion of the extension base material 48, respectively.

  In the extension base material 48, the right vertical side portion 48 r, the lower side portion 48 d, and the left vertical side portion 48 f at the periphery thereof are partially fixed to the joint portion between the outer lens 23 and the housing 21. The extension base material 48 has sufficiently larger rigidity than the extension 45, and the wall thickness dimension is set to about 2.5 mm, for example. Here, as a material of the extension base material 48, polybutylene terephthalate (PBT) or the like is preferably used. That is, the extension 45 and the light source cover 43 are formed to be fragile with respect to the extension base material 48.

<About the peripheral support structure of the extension 45>
The upper side 45u and the right side 45r of the extension 45 are attached to the upper side 23u and the right side 23r of the lens edge 23f of the outer lens 23, as shown in FIGS. Further, the lower side portion 45d and the left side portion 45f of the periphery of the extension 45 are attached to the notch upper side portion 48u and the notch vertical side portion 48t of the notched portion of the extension base material 48 as described above.

  That is, as shown in FIG. 5, the upper side 45u of the extension 45 has a slit-like opening (not shown) on the upper side 45u that is hung from the rear side claw 23k of the upper side 23u of the outer lens 23 from behind. The outer lens 23 is attached to the upper side 23u. Further, as shown in FIG. 6, the lower side portion 45 d of the extension 45 has a slit-like opening (not shown in the figure) of the lower side portion 45 d that is hung from the rear side with respect to the claw 48 k of the notched upper side portion 48 u of the extension base material 48. Thus, the extension base 48 is attached to the notch upper side 48u.

  As shown in FIG. 7, the corner portion (see FIG. 4) between the right side portion 45r and the upper side portion 45u of the extension 45 is positioned in the positioning hole (not shown in the figure) of the right side portion 45r, and the positioning pin of the right side portion 23r of the outer lens 23. By passing 23p, it is positioned with respect to the outer lens 23. Then, the upper portion of the right side portion 45r of the extension 45 is fixed to the upper portion of the right side portion 23r of the outer lens 23 with a screw 49 from behind using a screw hole (not shown) formed in the right side portion 45r.

  Also, the corners of the right side 45r and the lower side 45d of the extension 45 and the corners of the upper side 45u and the left side 45f (see FIG. 4) are screw holes (not shown) as shown in FIG. The screw 49 is fixed to the extension base material 48 and the outer lens 23 from behind.

<Operation of the headlamp unit 20 at the time of collision>
For example, when the pedestrian collides with the headlamp unit 20 while the vehicle 10 is traveling, a collision load F is first applied to the upper part of the outer lens 23 of the headlamp unit 20 and the outer lens 23 is broken. The collision load F is applied to the light irradiation lens 33 and the light source cover 43 of the light source device 30 through the extension 45 of the design member 40. Here, since the extension 45 and the light source cover 43 of the design member 40 are thinned to about 1.5 mm to 0.5 mm by polycarbonate (PC) or the like, they are easily broken or deformed by receiving the collision load F. . Therefore, the collision load F can be absorbed by the extension 45 and the light source cover 43 of the design member 40. Further, since the extension 45 is attached to the outer lens 23 and the extension base material 48 from the rear side, when the collision load F is received, the extension 45 is easily detached rearward from the outer lens 23 and the extension base material 48.

<Correspondence between Terms in Embodiment 1 and Terms in Claims>
As described above, the extension 45 and the light source cover 43 of the design member 40 correspond to a part of the design member formed weakly in the present invention, and the extension base material 48 of the design member 40 is the other of the design member of the present invention. Corresponds to the part. The extension 45 corresponds to the fragile cover of the present invention. Furthermore, the light irradiation lens 33 of the light source device 30 corresponds to the light irradiation unit of the light source device of the present invention.

<Advantages of the headlamp unit 20 according to this embodiment>
According to the headlamp unit 20 according to the present embodiment, the extension 45 and the light source cover 43 (a part of the design member) are formed more fragile than the extension base material 48 (the other part of the design member). Therefore, when the collision load F is applied to the outer lens 23 of the headlamp unit 20 and the outer lens 23 is broken, and the collision load F is applied to the extension 45 or the like, the extension 45 or the like is easily broken or deformed. . Thereby, the absorption performance of the collision load F improves. Moreover, since the part which is easy to receive the collision load F in the design member 40 is formed weakly, it becomes easy to absorb the collision load F efficiently. Further, when the headlamp unit 20 receives a collision load F from the front side of the vehicle, the extension base material 48 is easily deformed or detached from the extension base material 48 or the like to the rear side.

<Example of change>
In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in the present embodiment, an example in which the extension 45 of the design member 40 is attached to the extension base material 48 by claw engagement and a screw 49 is shown. However, it is also possible to attach the extension 45 to the extension base material 48 by adhesion or the like. Further, in the present embodiment, an example in which the wall thickness dimension of the extension 45 is made weak by making it sufficiently smaller than the wall thickness dimension of the extension base material 48 is shown. However, by changing the materials of the extension 45 (fragile portion) and the extension base material 48, it is possible to form a portion corresponding to the extension 45 sufficiently fragile to the extension base material 48.

10 ··· Vehicle 20 ··· Headlamp unit (lamp unit)
21 .... Housing 21h ... Opening 23 ... Outer lens 30 ... Light source device 33 ... Light irradiation lens (light irradiation section)
40 ... Design member 43 ... Light source cover (part of design member)
45 .... Extension (part of the design member, fragile cover)
48 .... Extension base material (other parts of design members)
F: Collision load

Claims (5)

A housing having an opening formed on the front surface side, an outer lens that closes the opening of the housing, a light source device housed in a space formed by the outer lens and the housing, and light irradiation of the light source device in the space A lamp unit of a vehicle provided with a design member provided around the portion,
A part of the design member is a vehicle lamp unit that is formed more fragile than the other part of the design member. The vehicle lamp unit according to claim 1,
A lamp unit for a vehicle in which a part of the design member facing the outer lens is formed weakly. A vehicle lamp unit according to claim 1 or 2,
A part of the design member is a lamp unit of a vehicle in which a wall thickness dimension is set smaller than the other part of the design member and is formed with a substantially uniform wall thickness dimension. A vehicle lamp unit according to any one of claims 1 to 3,
A part of the design member is a separate member from the other part of the design member,
A vehicle lamp unit in which a part of the design member is connected to the other part of the design member from the rear side at a boundary position between a part of the design member and another part of the design member. A lamp unit for a vehicle according to claim 4,
A part of the design member is provided around the light irradiation unit in front of the light source cover at a position of the light source device, and around the light irradiation unit in front of the light source cover. A lamp unit for a vehicle having a fragile cover connected to the part.

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