JP2012201180A - Structure for mounting vehicular lamp to bumper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for mounting a vehicular lamp to a bumper in which the vehicular lamp can be made compact while ensuring high waterproof property by mitigating the influence of a stress onto the joint of an outer lens.SOLUTION: In the structure for mounting the vehicular lamp 1 to the bumper 10, at least a bulb (light source) 5 is accommodated within a lamp chamber 4 formed of a housing 2 and an outer lens 3 joined to the opening edge of the housing by a melt seal 8. The mounting structure adopts a configuration in which a stay 9 in a rectangular box shape is integrally and projectingly provided to a part of the outer periphery of the housing 2 and the stay 9 is fastened to the bumper 10 by a screw (fastening tool) 11, thereby mounting the vehicular lamp 1 to the bumper 10. Furthermore, a hook 2c is integrally and projectingly provided inside the stay 9 of the housing 2, and an engaging pawl 3b projectingly provided to the edge of the outer lens 3 is engaged with the hook 2c.

Description

  The present invention relates to a structure for mounting a vehicular lamp to a bumper in which an outer lens is joined to the periphery of an opening of a housing by a melt seal.

  In general, a vehicular lamp is configured such that a light source, a reflector, and the like are accommodated in a lamp chamber defined by an outer lens that covers a housing and an opening of the housing. In order to prevent water from entering from the peripheral edge of the outer lens into the lamp chamber, the outer lens It is generally well practiced to join the periphery of the housing to the periphery of the opening of the housing by a melt seal that is a waterproof adhesive (see, for example, Patent Document 1). Here, an example of a structure for mounting such a vehicular lamp to a bumper is shown in FIG.

  7 is a side sectional view showing a conventional example of a bumper mounting structure for a vehicular lamp. The illustrated vehicular lamp 101 is joined to the housing 102 and the periphery of the opening by a melt seal (hot melt adhesive) 108. A bulb 105 and a reflector 106, which are light sources, are accommodated in a lamp chamber 104 defined by the outer lens 103 formed.

  A stay 109 is erected integrally with the upper portion of the housing 102, and a screw 111 inserted into a circular screw insertion hole 109 d formed on the upper portion of the stay 109 is attached to the bumper 110. The vehicular lamp 101 is attached to the bumper 110 by being screwed into a screw boss 110 a protruding on the back side.

JP-A-8-055505

  As shown in FIG. 7, in the configuration in which the vehicular lamp 101 is attached to the bumper 110 via the plate-like stay 109, the tightening stress of the screw 111 reaches the joint portion of the outer lens 103 by the hot melt 108, and the hot melt 108 is stressed. May peel off and damage the waterproofing. Therefore, in order to avoid the influence of the tightening stress of the screw 111, the tightening portion of the screw 111 is separated from the joint portion of the outer lens 103.

  However, if the tightening portion of the screw 111 is moved away from the joint portion of the outer lens 103 as described above, the height of the stay 109 increases, and the entire vehicle lamp 101 is increased in size.

  The present invention has been made in view of the above problems, and the object of the present invention is to reduce the size of a vehicle lamp while alleviating the influence of stress on the joint portion of the outer lens and ensuring high waterproofness. An object of the present invention is to provide a mounting structure for a vehicle.

  In order to achieve the above object, the invention according to claim 1 is directed to a bumper for a vehicular lamp, in which at least a light source is accommodated in a lamp chamber defined by a housing and an outer lens joined to the periphery of the opening by a melt seal. As the mounting structure, a structure in which a rectangular box-shaped stay is integrally projected on a part of the outer periphery of the housing and the vehicle lamp is mounted on the bumper by fastening the stay to the bumper with a fastener. It is characterized by that.

  According to a second aspect of the present invention, in the first aspect of the present invention, a hook is integrally protruded inside the stay of the housing, and an engaging claw protruding from the periphery of the outer lens is engaged with the hook. It was made to be characterized.

  According to the first aspect of the present invention, the vehicle lamp is attached to the bumper by fastening the rectangular box-like stay protruding from a part of the outer periphery of the housing to the bumper with the fastener. The tightening stress due to is dispersed and absorbed by the rectangular box-shaped stay. For this reason, the influence of the tightening stress on the outer lens can be kept low even if the place where the stay fastener is fastened is not far from the joint of the outer lens, and the melt seal is prevented from peeling off and the outer lens and the housing are joined. Intrusion of water into the lamp chamber from the section is prevented, and high waterproofness is ensured for the vehicle lamp. Moreover, since the height of the stay can be kept low, the size of the vehicular lamp can be reduced.

  According to the second aspect of the present invention, the outer lens is surely detached from the housing by engaging the engaging claw protruding from the periphery of the outer lens with the hook protruding integrally inside the stay of the housing. It is prevented.

It is a front view of the lamp | ramp for vehicles attached to the bumper by the attachment structure which concerns on this invention. It is the sectional view on the AA line of FIG. It is the B section enlarged detail drawing of FIG. It is a front view of the stay of a vehicle lamp. It is a front back view of the stay of a vehicle lamp. It is the perspective view which looked at the stay of the vehicle lamp from the front diagonally downward. It is a sectional side view which shows the prior art example of the bumper attachment structure of a vehicle lamp.

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

  1 is a front view of a vehicle lamp mounted on a bumper by the mounting structure according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is an enlarged detail view of a portion B in FIG. FIG. 5 is a front view of the stay of the vehicular lamp, FIG. 5 is a front view of the stay, and FIG. 6 is a perspective view of the stay as seen from diagonally below the front.

  The vehicular lamp 1 according to the present embodiment is attached to the left and right of a rear bumper 10 at the rear of the vehicle. The vehicular lamp 1 includes a housing 2 and its rear side (see FIG. 2). A bulb 5 and a reflector 6 as light sources are accommodated in a lamp chamber 4 defined by an outer lens 3 that covers an opening that opens to the left.

  The housing 2 is integrally formed in a rectangular box shape with a light-impermeable resin, and a fitting groove 2a that opens toward the rear of the vehicle is formed at the periphery of the opening. A circular insertion hole 2b is formed at the bottom of the housing 2, and the valve 5 is inserted and held substantially vertically from below through a socket 7 in the insertion hole 2b.

  The outer lens 3 is integrally formed of a light-transmitting resin, and a leg portion 3a is integrally protruded from the periphery of the outer lens 3 toward the front of the vehicle (right side in FIG. 2). The outer lens 3 has the leg 3a projecting from the periphery of the outer lens 3 fitted into the fitting groove 2a formed at the periphery of the opening of the housing 2, and the fit is melt-sealed (hot) as a waterproof adhesive. It is joined to the opening of the housing 2 by bonding with a melt adhesive 8.

  By the way, as shown in FIGS. 1 to 3, a rectangular box-shaped stay 9 is integrally projected on the upper surface of the housing 2. As shown in FIGS. 4 to 6, the stay 9 is partially open at the front and lower sides of the vehicle, and is centered in the width direction of the flat rear wall 9 b that bends downward from the rear end of the upper wall 9 a. A cylindrical fitting tube 9c is integrally projected from the part toward the rear of the vehicle. A circular screw insertion hole 9d is formed at the center of the fitting tube 9c of the rear wall 9b of the stay 9.

  Further, a hook 2c is erected integrally with the inside of the stay 9 on the upper surface of the housing 2, and as shown in detail in FIG. 3, an engaging claw projecting from the outer periphery of the upper end of the outer lens 3 is provided on the hook 2c. The outer lens 3 is fixed to the housing 2 by engaging the 3b.

  On the other hand, as shown in FIG. 2, a cylindrical screw boss 10a is provided on the back side of the rear bumper 10 so as to project substantially horizontally toward the front of the vehicle, and below the vehicle bumper 1 in the mounted state. A rectangular hole 10b through which the outer lens 3 of the lamp 1 passes is formed.

  Thus, the vehicular lamp 1 is attached to the rear bumper 10 by the following attachment structure.

  That is, the vehicular lamp 1 is installed on the back side of the rear bumper 10 with the outer lens 3 facing the rear of the vehicle, and the tip of the outer lens 3 is fitted into the rectangular hole 10b of the rear bumper 10 from the front of the vehicle. The fitting cylinder 9 c is fitted into the outer periphery of the tip end portion of the screw boss 10 a of the rear bumper 10. Then, the vehicular lamp 1 is positioned with high accuracy with respect to the rear bumper 10, and in this state, the screw 11 inserted from the front of the vehicle into the screw insertion hole 9d of the stay 9 is screwed into the screw boss 10a of the rear bumper 10 and tightened. As shown in FIG. 2, the lamp 1 is attached to the rear side of the rear bumper 10, and the front end portion of the outer lens 3 of the vehicular lamp 1 is exposed from the rectangular hole 10 b of the rear bumper 10. Accordingly, when the bulb 5 of the vehicular lamp 1 is turned on, the light is reflected directly or by the reflector 6 and travels toward the rear of the vehicle, and is emitted toward the rear of the vehicle while being distributed by passing through the outer lens 3.

  As described above, in the present embodiment, the rectangular box-shaped stay 9 protruding from a part of the outer periphery of the housing 2 of the vehicular lamp 1 is screwed into the screw boss 10a of the rear bumper 10 with the screw 11, thereby for the vehicle. Since the lamp 1 is attached to the rear bumper 10, the tightening stress due to the screw 11 is dispersed by the rectangular box-shaped stay 9 to be absorbed and relaxed. For this reason, the influence of the tightening stress on the joined portion of the outer lens 3 can be kept low even if the fastening portion by the screw 11 of the stay 9 is not far away from the joined portion of the outer lens 3, and the peeling of the melt seal 8 is prevented. As a result, the intrusion of water into the lamp chamber 4 from the joint between the outer lens 3 and the housing 2 is prevented, and high waterproofness is ensured for the vehicular lamp 1. Since the height of the stay 9 of the housing 2 can be kept low, the housing 9 can be reduced in size, and the vehicle lamp 1 as a whole can be reduced in size.

  Further, in the present embodiment, the engaging claw 3b protruding from the periphery of the outer lens 3 is engaged with the hook 2c protruding integrally with the interior of the stay 9 of the housing 2 of the vehicle lamp 1. Further, it is possible to reliably prevent the outer lens 3 from being detached from the housing 2.

  Although the present invention has been described with respect to an embodiment in which the present invention is applied to a structure for mounting a vehicular lamp to a rear bumper, the present invention is also applicable to a structure for mounting a vehicular lamp to a front bumper. Of course there is.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Housing 2a Housing fitting groove 2b Housing insertion hole 2c Housing hook 3 Outer lens 3a Outer lens leg 3b Outer lens engaging claw 4 Lamp chamber 5 Bulb (light source)
6 reflector 7 socket 8 melt seal 9 stay 9a upper wall 9b stay rear wall 9c fitting tube 9d stay screw insertion hole 10 rear bumper 10a screw bump boss 10b rear bumper rectangular hole 11 screw

Claims (2)

A mounting structure for a bumper of a vehicular lamp, in which at least a light source is accommodated in a lamp chamber defined by an outer lens joined to the periphery of the opening of the housing by a melt seal,
A vehicle lamp characterized in that a rectangular box-shaped stay is integrally projected on a part of the outer periphery of the housing, and the vehicle lamp is attached to the bumper by fastening the stay to the bumper with a fastener. Bumper mounting structure. 2. The vehicular lamp according to claim 1, wherein a hook is integrally projected inside the stay of the housing, and an engagement claw projecting from a peripheral edge of the outer lens is engaged with the hook. Bumper mounting structure.

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