JPH0741836U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vehicle lighting device that can be mounted on a vehicle and can prevent the lens from floating and generating abnormal noise even when it is exposed to vibration and a severe external environment for many years. The mounting leg portion 14a of the inner lens 14 is formed to have a guide hole 14b having one end opening toward the bottom of the leg insertion hole 3a and the other end opening toward the outer lens 5. The mounting leg portion 14a having the guide hole 14b of the lens 14 is press-inserted into the hot melt adhesive 6a in the leg insertion hole 3a, and the hot melt adhesive 6a.
Is pushed toward the outer lens 5 through the guide hole 14b and brought into contact therewith, and the inner lens 14 and the outer lens 5 are integrally joined by the pushed hot melt adhesive 6a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle lamp in which an inner lens and an outer lens are held in a housing through a hot melt adhesive.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 6, a leg mounting groove 3b extending along the open end portion 3c of an open end portion 3c of a housing 3 in which a light bulb 2 is installed, and a leg mounting groove portion 3b are located inside the leg mounting groove portion 3b. The leg insertion hole 3a is formed, and hot melt adhesives 6a and 6b are injected into the leg attachment groove 3b and the leg insertion hole 3a to attach the attachment leg portion 4a of the inner lens 4 and the attachment leg portion 5a of the outer lens 5 to the leg. A vehicular lamp 1 is known in which the mounting legs 4a of the inner lens 4 are joined to the housing 3 via the hot melt adhesives 6a and 6b by being pressed and inserted into the mounting groove 3b and the leg mounting hole 3a.

[0003]

[Problems to be solved by the device]

 However, in the conventional vehicular lamp 1, the hot melt adhesives 6a and 6b are respectively injected into the leg insertion hole 3a and the leg mounting groove 3b of the housing 3, and each lens 5 is inserted through the hot melt adhesives 6a and 6b. , 14 are separately held in the housing 3, so that various loads are concentrated on the joint. Therefore, if the vehicular lamp 1 is mounted on a vehicle and kept exposed to the vibration and severe external environment of the vehicle for many years, the inner lens 14 may be lifted or abnormal due to cracking or cutting of a part of the joint. Has the problem of leading to the occurrence of

The present invention has been made in view of the above circumstances, and its purpose is to provide a vehicle lamp capable of preventing the inner lens from floating and causing abnormal noise due to aging. Especially.

[0005]

In order to achieve the above object, a vehicular lamp according to the present invention is provided with a leg mounting groove extending along an open end of a housing in which a light bulb is stored. And a leg insertion hole located on the inner side of the leg mounting groove are formed, and hot melt adhesive is injected into the leg mounting groove and the leg insertion hole to form the inner lens mounting leg and the outer lens mounting leg. A vehicle lamp in which a mounting leg portion of an inner lens and a mounting leg portion of an outer lens are joined to the housing via the hot melt adhesive by being pressed and inserted into the leg mounting groove and the leg insertion hole, respectively. The mounting leg of the lens has a guide hole whose one end opens toward the bottom of the leg insertion hole and the other end opens toward the outer lens, and the mounting leg of the inner lens is connected to the leg insertion hole. Hot Me in Part of the hot melt adhesive is extruded toward the outer lens through the guide hole and brought into contact therewith, and the inner lens and the outer lens are extruded by the extruded hot melt adhesive. Are integrally joined.

[0006]

[Action]

 According to the vehicular lamp of the present invention, the hot melt adhesive is extruded through the inner hole of the mounting leg formed on the inner lens, and the extruded hot melt adhesive comes into contact with the outer lens and the inner lens. The lens and the lens are joined together.

[0007]

【Example】

 An embodiment of a vehicular lamp according to the present invention will be described below with reference to the drawings.

In FIG. 1A, a vehicular lamp 1 includes a housing 3 in which a light bulb 2 is housed, an outer lens 5 and an inner lens 14 which are held in the housing 3 via hot melt adhesives 6 a and 6 b. I have it.

The open end 3c of the housing 3 is formed with a leg mounting groove 3b extending along the open end 3c and a leg insertion hole 3a located inside the leg mounting groove 3b. The leg insertion holes 3a are appropriately formed at a plurality of locations inside the leg mounting groove 3b.

Mounting legs 14 a are formed at the edges of the inner lens 14. The mounting leg portion 14a has a substantially circular tube shape. A guide hole 14b penetrates the mounting leg 14a in the axial direction.

The length of the mounting leg portion 14 a is set to correspond to the depth of the leg insertion hole 3 a inward from the inner wall surface of the inner lens 14 and to the outer surface close to the inner surface of the outer lens 5. The outer lens 5 has mounting legs 5a extending substantially vertically from the inner wall surface and extending over the entire periphery of the outer lens 5.

Assembling as the vehicle lamp 1 is performed by injecting an appropriate amount of hot melt adhesives 6a and 6b into the leg insertion hole 3a and the leg mounting groove 3b provided in the housing 3 to mount the inner lens 14 on the mounting leg portion 14a. Is pressed into the leg insertion hole 3a. A part of the hot melt adhesive 6a is extruded from the guide hole 14b toward the outer lens 5. Subsequently, the mounting leg portion 5a of the outer lens 5 is pressed and inserted into the leg mounting groove 3b, and when the mounting leg portion 5a over the entire peripheral edge portion of the outer lens 5 is joined to the leg mounting groove 3b of the housing 3, at the same time, the hot melt adhesive 6a contacts the inner surface of the outer lens 5 and is joined to the inner lens 14.

FIG. 1B is a partially enlarged cross-sectional view of the joint portion. A part of the hot melt adhesive 6a injected into the leg mounting hole 3a of the housing 3 is pushed out from the guide hole 14b of the mounting leg portion 14a. The outer lens 5 is brought into contact with the inner surface of the outer lens 5 and the inner lens 14 is securely joined. Further, since the mounting leg portion 5a of the outer lens 5 is joined to the housing 3 over the entire circumference, it has sufficient joining strength to support the inner lens 14.

FIG. 2 is a partial perspective view of FIG. 1, and shows a mounting leg portion 14a having a guide hole 14b for the inner lens 14, a mounting leg portion 5a for the outer lens 5, a leg insertion hole 3a for the housing 3, and a leg mounting groove. The relationship with 3b is specified.

FIG. 3 is a sectional view of a joint portion showing a second embodiment of the vehicular lamp of the present invention. The shapes and joining methods of the housing 3 and the inner lens 14 are the same as in the first embodiment, but in the second embodiment, the concave projection 15b is formed on the inner wall surface of the outer lens 15 and the mounting leg 14a of the inner lens 14 is formed. The hot melt adhesive 6a is provided immediately above the inner surface of the inner lens 14 and the outer lens 15 so that the contact area between the inner lens 14 and the outer lens 15 is strengthened.

FIG. 4 is a sectional view showing a third embodiment of the vehicular lamp of the present invention. The shapes and joining methods of the housing 3 and the inner lens 14 are the same as those in the first embodiment, but in this third embodiment, the outer lens 25 is provided with a protruding projection 25b directly above the mounting leg 14a of the inner lens 14. The hot-melt adhesive 6a is easily spread along the circumference of the projecting protrusion 25b, and the joining area is widened to further strengthen the joined state of the inner lens 14 and the outer lens 25.

FIG. 5 is a partial sectional view and a perspective view showing a fourth embodiment of the vehicular lamp of the present invention. The shapes and joining methods of the inner lens 24 and the outer lens 5 are the same as in the first embodiment. In the fourth embodiment, a projection 13c for guiding the mounting leg portion 24a is provided in the leg insertion hole 13a of the inner lens 24 of the housing 13, and the projection 13c is formed in the guide hole 24b of the mounting leg portion 24a of the inner lens 24. It is configured such that the hot melt adhesive 6a is inserted into the outer lens 5 with an appropriate clearance and is pushed out toward the outer lens 5 at the same time.

Therefore, the contact area between the protrusion 13c provided in the leg insertion hole 13a of the housing 13 and the guide hole 24b of the mounting leg portion 24a of the inner lens 24 increases, and the joining force increases. Further, the protrusion 13c can surely push out the hot melt adhesive 6a toward the outer lens 5, and the outer lens 5 and the inner lens 24 are surely joined together, and at the same time, the hot melt adhesive 6a in the guide hole 24b is removed. Use less.

As described above, in the vehicular lamp 1 of the present invention, the inner lens 14, 24 is configured to be held by the housing 3 and the outer lens 5, so that the holding state is more reliable. It can be anything.

Further, by forming the opening diameters of the guide holes 14b and 24b so that the outer lens 5 side becomes smaller, the hot melt adhesive 6a can be easily discharged to the outer lens 5 side.

[0021]

[Effect of device]

 As described above, the vehicular lamp according to the present invention has the structure in which the housing, the inner lens, and the outer lens are integrally joined, so that the rigidity of the vehicular lamp as a whole is increased, and the vehicle lamp is resistant to vibration and environmental condition changes. Even if it is mounted on a vehicle and used for many years, cracks and breaks at the joint can be suppressed, and the noise of the vehicle lighting and the inner lens are prevented from floating.

[Brief description of drawings]

FIG. 1 is a main sectional view and a partial sectional view of a joint showing a first embodiment of a vehicular lamp of the present invention.

FIG. 2 is a perspective view of FIG. 1 of the present invention.

FIG. 3 is a partial cross-sectional view showing a second embodiment of the vehicular lamp joint portion of the present invention.

FIG. 4 is a partial cross-sectional view showing a third embodiment of the vehicle lamp joint portion of the present invention.

FIG. 5 is a partial cross-sectional view and perspective view showing a fourth embodiment of the vehicular lamp joint portion of the present invention.

FIG. 6 is a main cross-sectional view of a conventional vehicle lamp.

[Explanation of symbols]

 1 Vehicle Lamp 2 Light Bulb 3 Housing 3a Leg Insertion Hole 3b Leg Mounting Groove 3c Open End 13c Protrusion 14 Inner Lens 14a Mounting Leg 14b Guide Hole 5 Outer Lens 5a Mounting Leg 6 Hot Melt Adhesive

Claims (1)

[Scope of utility model registration request] 1. A leg mounting groove extending along the open end and a leg insertion hole located inside the leg mounting groove are formed in an open end of a housing in which a light bulb is stored. Hot melt adhesive is injected into the mounting groove and the leg insertion hole, and the mounting leg portion of the inner lens and the mounting leg portion of the outer lens are pressed and inserted into the leg mounting groove and the leg insertion hole. In a vehicular lamp in which a mounting leg of an inner lens and a mounting leg of an outer lens are joined to the housing, one end of the mounting leg of the inner lens is open toward the bottom of the leg insertion hole and the other end is Having a guide hole opening toward the outer lens, the mounting leg portion of the inner lens is press-inserted into the hot melt adhesive in the leg insertion hole, and a part of the hot melt adhesive passes through the guide hole. Through Wherein the contact is pushed toward the outer lens, a vehicle lamp and the inner lens and the outer lens is characterized in that it is joined together by the hot melt adhesive extruded said.