JPH0658505U - Waterproof cover for vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] The waterproof cover for waterproofing between the opening of the lamp housing and the light bulb and the member for fixing the waterproof cover are integrated into one component, and the mounting to the lamp housing can be performed easily and reliably. To do so. [Structure] A waterproof cover 13 for a vehicle lamp is formed by integrally molding a cover main portion 14 and a frame 18. The cover main portion 14 is formed of a heat-resistant rubber material into a cylindrical shape so as to be fitted onto the inner peripheral wall 9 at the rear portion of the lamp housing,
The frame body 18 inserted therein is formed of a leaf spring material. The frame body 18 is provided with four leg portions 20 and cut-and-raised locking pieces 24 are formed on these.
The locking piece 24 is projected toward the inside of the cover main portion 14. When the waterproof cover 13 is fitted onto the inner peripheral wall 9, the locking piece 24 is elastically engaged with the receiving edge 12a of the square hole 12 formed on the side surface of the inner peripheral wall 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides a new waterproof cover for a vehicular lamp in which the cover member and the fixing member are integrally formed so that the waterproof cover can be easily attached to the lamp housing. It is what

[0002]

[Prior art]

 BACKGROUND ART There is an automotive lamp in which a reflector is tiltably arranged in a lamp housing and a light bulb is attached to the reflector. In such a lamp, a lamp is used to connect a light bulb to a power source or replace a light bulb. It is necessary to provide an opening in the housing.

[0003] If there is such an opening, water may enter the lamp through the opening, so it is necessary to waterproof the opening. Usually, the opening of the lamp housing and the base of the bulb are connected. A waterproof cover attached between them is used.

FIG. 16 shows an example of a waterproof structure using such a waterproof cover.

Reference numeral a denotes a lamp housing, and a circular opening c is formed in a central portion of a rear wall b thereof.

An annular wall d is provided so as to project rearward from the opening edge of the opening c.

Reference numeral e denotes a reflecting mirror that is tiltably arranged in the lamp housing a, and a mounting portion g for the light bulb f is formed in the center of the rear portion thereof so that the light bulb f can be detachably attached thereto. Has become.

Then, the base portion h of the light bulb f is projected rearward of the reflecting mirror e in a state where the light bulb f is attached to the mounting portion g.

Reference numeral i denotes a waterproof cover, including a large annular set portion j, a small cylindrical fitting portion k, and an intermediate portion 1 connecting the set portion j and the fitting portion k. Is integrally formed of a rubber material, and the intermediate portion 1 is formed in a thin bellows shape.

The fitting portion k of the waterproof cover i is externally fitted to the base portion h of the light bulb f, and the setting portion j is fitted to the annular wall d of the lamp housing a. The space between the opening edge of the opening c and the base h of the light bulb f is closed to prevent water or the like from entering the lamp housing a.

Reference numeral m denotes a locking cap for holding the setting portion j of the waterproof cover i fitted on the annular wall d from the outside.

The annular wall d is provided with a locking mechanism for the locking cap m. For example, when the locking cap m is rotated, the locked portion is engaged with the locking portion on the annular wall side to lock the locking cap m. Measures are taken to restrict further rotation of the cap.

Therefore, when attaching the waterproof cover i to the lamp housing a, first, the waterproof cover i is taken out and the fitting portion k is externally fitted to the base portion h of the light bulb f, and the setting portion j is attached to the lamp. It is fitted onto the annular wall d of the housing a to close between the opening edge of the opening c of the lamp housing a and the base h of the light bulb f.

Then, the locking cap m is taken out and attached to the rear end of the lamp housing a, and the locking cap m is held by sandwiching the set part j of the waterproof cover i between the locking wall m and the annular wall d. Then, rotate the locking cap m to the locked position so that it does not come off.

[0015]

[Problems to be solved by the device]

 By the way, the above-mentioned waterproof cover for a vehicle lamp has a structure in which the locking cap m is engaged with the annular wall d after the waterproof cover i is attached. Therefore, there is a problem that it is necessary to provide a guide mechanism or the like for making the structure of the annular wall d complicated, the molding die of the lamp housing a becomes complicated, and the cost increases.

Further, since the locking cap m is required in addition to the waterproof cover i, the two members must be attached to the lamp housing a in order at the time of assembling or replacing the light bulb f, which is troublesome work. However, if the locking cap m is not properly attached to the waterproof cover, the waterproof function will be inadequate, or if the locking cap m is lost, the waterproof cover will not be able to be held. There is a problem that it will end up.

[0017]

[Means for Solving the Problems]

 Therefore, in order to solve the above-mentioned problems, the waterproof cover of the vehicle lighting device of the present invention provides waterproofing between the light bulb arranged in the lamp housing and the opening formed in the cylindrical rear wall of the lamp housing. A watertight cover for a vehicle lamp for use in a vehicle, which is formed on the side wall of the rear wall of the lamp housing and the main body of the lamp housing, which is formed into a tubular shape by a soft elastic material so as to be fitted onto the rear wall of the lamp housing. The engaging member having an engaging portion for engaging with the engaged portion is integrally formed, and the engaging portion projects toward the inside of the cover main portion.

[0018]

[Action]

 Therefore, according to the waterproof cover for a vehicle lighting device of the present invention, the cover main part and the engaging member are integrally formed, and the waterproof cover can be attached to the rear wall of the lamp housing without using the locking cap. Therefore, a complicated slide mechanism for the locking cap is unnecessary.

Further, when attaching the waterproof cover to the lamp housing, the waterproof cover can be fixed in one operation only by externally fitting the cover main portion onto the rear wall of the lamp housing, which is a troublesome task. It does not take a long time to ensure the reliability of installation, and there is no inconvenience due to loss of the locking cap.

[0020]

【Example】

 The details of the waterproof cover of the vehicular lamp of the present invention will be described below with reference to the illustrated embodiments.

1 to 8 show a first embodiment of the present invention.

FIG. 8 shows an example of a vehicle headlamp to which the present invention is applied. The headlamp 1 of the headlamp 1 is made of synthetic resin.

The lamp housing 2 is in the shape of a box that opens toward the front, and an installation groove 3 that opens toward the front is formed outside the opening edge.

Reference numeral 4 denotes a lens formed of a transparent material such as glass or transparent synthetic resin, and the front surface portion 4a and the side wall portion 4b protruding rearward from the peripheral edge of the front surface portion 4a are integrally formed. It is formed by.

The rear end of the side wall 4 b is fitted into the installation groove 3 of the lamp housing 2 and fixed by adhesion or the like, whereby it is surrounded by the lamp housing 2 and the lens 4. A lamp space 5 is formed.

Reference numeral 6 denotes a reflecting mirror, which is provided in the lamp space 5 so as to be tiltable left and right and up and down.

Reference numeral 7 denotes a light bulb, which is detachably attached to the rear center of the reflecting mirror 6.

The supporting of the reflecting mirror 6 to the lamp housing 2 and the attachment of the electric bulb 7 to the reflecting mirror 6 may be performed by a known method, and this is related to the gist of the present invention. Therefore, detailed illustration and description thereof will be omitted.

The rear wall 2 a of the lamp housing 2 is provided with a cylindrical outer peripheral wall 8 protruding rearward, and a cylindrical inner peripheral wall 9 inside the outer peripheral wall 8 protruding rearward from the outer peripheral wall 8. An annular recess 10 is formed between the outer peripheral wall 8 and the inner peripheral wall 9.

Reference numeral 11 denotes a circular hole in the inner peripheral wall 9, and the light bulb 7 is attached to the rear end portion of the reflecting mirror 6 through the circular hole 11.

FIG. 4 is a perspective view showing the rear end of the lamp housing 2.

Four angular holes 12, 12, ... Are formed at predetermined intervals from a position near the recess 10 of the inner peripheral wall 9 to a middle position of the inner peripheral wall 9. .., which are thinner than the thickness of the inner peripheral wall 9, are formed at the rear inner edges of 12, 12 ,.

In the outer peripheral surface of the inner peripheral wall 9, sloped surfaces 9a, 9a, ..., which are displaced outward as they go forward, are formed at the ends located behind the square holes 12, 12 ,. Has been.

FIGS. 1 to 3 show a waterproof cover 13, in which a leaf spring material and a heat-resistant rubber material (for example, EPT (ethylene polypropylene terpolymer)) are integrally formed by insert molding. There is.

The waterproof cover 13 is a hat in which a substantially cylindrical cover main portion 14 having a light bulb holding portion as shown in the figure and a flange portion 15 protruding laterally from the hem of the cover main portion 14 are integrated. It has a shape of a shape.

The cover main portion 14 has an inner diameter large enough to be fitted onto the inner peripheral wall 9 of the lamp housing 2, and a light bulb holding portion 17 is continuously provided in a central portion thereof via a bellows-like connecting portion 16. It is being touched. Ring-shaped folds 17a, 17a, ... Are formed on the inner peripheral surface of the light bulb holding portion 17 near the front end.

In addition, a ring-shaped frame body 18 for reinforcing and fitting and fixing the waterproof cover 13 is buried near the outer peripheral edge of the cover main portion 14.

The frame body 18 framing the outer contour of the cover main portion 14 is made of a metal material (for example, a stainless steel plate or the like), and has a ring portion 19 having an L-shaped cross section, and the ring. Four leg portions 20, 20, ... Vertically provided on the portion 19 are integrally formed.

As shown in FIG. 2, four L-shaped block portions 21, 21, ... Are arranged on the outer surface of the cover main portion 14 with an angular interval of 90 ° around the central axis of the cover main portion 14. Has been.

Further, as shown in FIG. 1, the leg portions 20, 20, ... Of the frame body 18 are partially embedded in these L-shaped block portions 21, respectively.

The L-shaped block portions 21, 21, ... Form taper portions 21a, 21a, ... On the outer peripheral edge portion on the flange portion 15 side, and taper portions on the portion near the rear end. 21b, 21b, ... Are formed, and a part of the frame body 18 described above is cut inside the tapered portions 21b, 21b ,.

As shown in FIG. 6, the leg portion 20 of the frame body 18 is bent into an L-shape at the connecting portion 22 with the ring portion 19 and at one end portion (opposite the ring portion 19 side) of the connecting portion 22. It consists of the foot portion 23.

The connecting portion 22 is formed with a locking piece 24 whose rear end (on the side of the ring portion 19) projects inward by cutting and raising the central portion.

The locking piece 24 has a curved portion 24a that is curved in an arc shape along the circumferential direction of the ring portion 19 and a flat portion 24b that continuously extends straight from one end thereof. As shown in FIG. 1, the curved portion 24a projects outside the cover main portion 14 through an insertion opening 14a formed on the inner peripheral surface side of the cover main portion 14 corresponding to the L-shaped block portion 21.

When the waterproof cover 13 is molded, the legs 20 are deformed by the mold, and the elastic force of the leaf spring material causes the locking piece 24 to move toward the cover main part when taken out from the mold. The part 14 is bent toward the inside.

Most of the foot portion 23 is buried in the L-shaped block portion 21, but one portion 23 a thereof is exposed to the outside in a state of being flush with the side surface of the flange portion 15. A long hole 23b extending in the circumferential direction of the flange portion 15 is formed in a portion of the foot portion 23 embedded in the L-shaped block portion 21.

Annular ribs 25, 25 are formed on the front end surface of the flange portion 15, and a V-shaped groove 26 is formed between the two in the circumferential direction of the flange portion 15 as shown in FIG. ing. The surface where the ribs 25, 25 and the recess 10 of the lamp housing 2 are in close contact is a waterproof sealing surface.

Then, the waterproof cover 13 is attached to the lamp housing 2 as follows (see FIG. 7).

First, the bulb holding portion 17 of the waterproof cover 13 is externally fitted to the base portion 7 a of the bulb 7, and the L-shaped block portions 21, 21, ... The cover main part 14 is fitted onto the inner peripheral wall 9 of the lamp housing 2 while being aligned so as to correspond to the surfaces 9a, 9a ,.

At this time, the folds 17a, 17a, ... Formed on the inner peripheral surface of the light bulb holding portion 17 are completely adhered to the base portion 7a of the electric bulb 7, and the portion is waterproofed.

In addition, the locking piece 24 of the waterproof cover 13 has its curved portion 24 a elastically contacting the receiving edge 12 a of the square hole 12 formed on the side surface of the inner peripheral wall 9 with the inclined surface 9 a of the lamp housing 2 as a clue. As a result, the waterproof cover 13 is fixed to the inner peripheral wall 9 and prevented from coming off.

The flange portion 15 of the waterproof cover 13 is received in the recess 10 of the lamp housing 2, and the rib 25 is brought into close contact with the flat surface of the recess 10, so that the rib 25 travels through the inner peripheral wall 9 and the lamp housing 2 is closed. It can prevent water from trying to get inside.

The force of pressing the rib 25 against the flat surface of the recess 10 is obtained by the elastic force of the locking piece 24.

The role of the frame 18 in the waterproof cover 13 is to improve the rigidity of the cover main portion 14 and to fix the waterproof cover 13 to the lamp housing 2 by utilizing spring elasticity.

When the waterproof cover 13 is slightly rotated when removing the waterproof cover 13, the flat portion 24b of the locking piece 24 is moved by the step between the outer peripheral surface of the inner peripheral wall 9 and the receiving edge 12a of the square hole 12. Since the curved portion 24a is deformed to the outside and the curved portion 24a can be escaped from the square hole 12 by further rotating the waterproof cover 13, the waterproof cover 13 may be easily swung backward from this state.

As described above, the waterproof cover 13 is integrally formed by the cover main portion 14 and the frame body 18, so that the waterproof cover 13 can be integrated into one component. By doing so, it is possible to easily attach it to the lamp housing 2, so that the workability is improved, and the locking piece 24 can prevent the waterproof cover 13 from falling off.

Next, a second embodiment of the present invention will be described with reference to FIGS. 9 to 15.

The waterproof cover 13A shown in the second embodiment differs from the waterproof cover 13 shown in the first embodiment in the structure of the waterproof cover and the method of removing the waterproof cover. The following description will be focused on the differences between the two, and for parts that are not functionally different from the first embodiment, the same reference numerals as those used for the respective parts in the first embodiment will be given to those parts. The description is omitted.

FIG. 12 is a perspective view showing the rear end portion of the lamp housing 2.

On the side surface of the inner peripheral wall 9, four square holes 12, 12, ... Formed from the position near the recess 10 to the middle position of the inner peripheral wall 9, and between them are located in the center of the side surface. Cutouts 27, 27, ... That extend from the position near the recess 10 to the rear end are formed alternately with a predetermined interval.

Four protruding pieces 28, 28, ... Are formed by being sandwiched by these notches 27, 27, ..., And inclined surfaces 28a, 28a ,. Has been done. The thickness of the protruding piece 28 is larger than the thickness of the inner peripheral wall 9 near the recess 10.

The outer peripheral surface of the outer peripheral wall 8 is formed with inclined surfaces 29, 29, ... Reaching the rear end at positions corresponding to the square holes 12, respectively. Arrows 29a, 29a, ... (Only one of them is shown in the figure) are formed as alignment marks.

10 and 11 show the waterproof cover 13A, which is integrally formed by insert molding using a synthetic resin material and a heat resistant rubber material.

The waterproof cover 13 A is a hat shape in which a rubber-made cover main portion 14 having a substantially cylindrical shape as shown in the figure and a flange portion 15 protruding laterally from the hem of the cover main portion 14 are integrated. It has the shape of.

Reference numeral 30 is a frame body made of synthetic resin, and has a substantially cylindrical shape with widened hem as shown in FIGS. 9 and 13.

That is, in the frame body 30, the tubular portion 30a and the flange portion 30b are joined together at a portion having a hollow truncated cone shape.

The flange portion 30b is embedded in the flange portion 15 of the cover main portion 14 as shown in FIG. In addition, 30c, 30c ... Are elongated holes formed in the flange portion 30b.

Four engaging projections 31, 31, ... Are provided on the inner peripheral surface of the frame body 30 at predetermined intervals toward the inner side of the frame body 30, and these are formed. The positions are arranged so as to correspond to the respective square holes 12 of the lamp housing 2.

The amount of protrusion of the engaging protrusion 31 is not constant, but is varied along the circumferential direction of the frame body 30 as shown in FIG.

On the outer peripheral surface of the cover main portion 14 corresponding to these engaging projections 31, as shown in FIG. 10, arrows 32, 32, ... Are used as alignment marks for the flange portion 1 of the outer peripheral surface. It is formed from the position near 5 to the flange portion 15.

Numerals 33, 33 are knobs, which are provided to project laterally from the flange 15 and are formed with an angular interval of 180 ° with respect to the central axis of the cover main portion 14.

Reference numerals 34 and 34 denote reinforcing ribs, which are formed over the outer peripheral surface of the cover main portion 14 corresponding to the knob portion 33 and the flange portion 15.

Then, the waterproof cover 13A is attached to the lamp housing 2 as follows (see FIG. 14).

First, the bulb holding portion 17 of the waterproof cover 13 A is externally fitted to the base portion 7 a of the bulb 7, and each of the arrows 32, 32, ... Of the cover main portion 14 has an inclined surface 29 of the lamp housing 2. , 29, ..., The cover main portion 14 is fitted onto the inner peripheral wall 9 of the lamp housing 2 while being aligned so as to correspond to the arrows 29a, 29a ,.

Slopes 28a, 28a, ... Are formed at the rear end portions of the projecting pieces 28, 28, ... Of the inner peripheral wall 9, and the engaging projecting portions 31, 31 ,. The protrusions 28, 28, ... Are pushed inward by the .. and elastically deformed, so that the waterproof cover 13A can be fitted onto the inner peripheral wall 9 without applying excessive force.

The engaging projections 31, 31, ... Of the frame body 30 are moved forward over the outer surface of the projecting piece 28 and finally engaged with the rear end edge of the square hole 12, Thus, the waterproof cover 13A is fixed to the inner peripheral wall 9 and prevented from coming off.

When the waterproof cover 13 A is removed from the lamp housing 2, the engaging protrusions 31, 31, ... Of the frame body 30 are positioned so as to come to the positions of the notches 27, 27 ,. The cover 13A may be rotated.

To instruct this operation, for example, as shown in FIG. 15, an arrow or the like indicating the rotation direction at the time of removal should be formed on the end surface of the cover main portion 14 on the side opposite to the flange portion 15. Good.

By the rotation operation, the engaging projections 31, 31, ... Of the frame body 30 escape from the square holes 12, 12, ... Of the inner peripheral wall 9 to the notches 27, 27 ,. Since it is moved, it can be easily removed by sliding the waterproof cover 13A backward.

Note that if the protrusion amount of the engaging protrusion 31 is constant, an extra force is required when rotating the waterproof cover 13A when removing the waterproof cover 13A. Therefore, as shown in FIG. The protrusion amount (referred to as “Δd”) is minimized at one end of the engaging protrusion 31 in accordance with the direction of rotation (indicated by the arrow A), and the protrusion amount is the next in the opposite direction of the arrow A. It is advisable to adopt a structure in which the amount increases.

As described above, the waterproof cover 13 A can be made into one component by integrally molding the cover main portion 14 and the frame body 30, and the elasticity of the protrusion 28 of the inner peripheral wall 9 is utilized. This allows the waterproof cover 13A to be easily fitted on the lamp housing 2.

Further, when the waterproof cover 13A is removed from the lamp housing 2, a rotating operation is required, but since a special slide mechanism for this is not required, the structure is simplified.

[0083]

[Effect of device]

 As is clear from the above description, according to the present invention, the waterproof cover is attached to the rear wall of the lamp housing without using the locking cap by integrally forming the cover main part and the engaging member. Therefore, it is not necessary to provide a complicated slide mechanism on the rear wall of the lamp housing.

When the waterproof cover is attached to the lamp housing, the waterproof cover can be fixed to the lamp housing in almost one operation by fitting the cover main portion onto the rear wall of the lamp housing. It is suitable for automating the assembly work because it can be done with certainty without any troublesome work.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing a first embodiment of a waterproof cover for a vehicle lighting device of the present invention.

FIG. 2A is a perspective view of the waterproof cover according to the first embodiment, and FIG. 2B is a perspective view of the waterproof cover viewed from an angle different from that of FIG.

FIG. 3 is a plan view of the waterproof cover of FIG.

FIG. 4 is a perspective view showing a rear portion of the lamp housing.

FIG. 5 is a cross-sectional view of a main part showing a relationship between a locking piece and a square hole in an inner peripheral wall.

FIG. 6 is an enlarged perspective view showing a leg portion of a frame body.

FIG. 7 is a perspective view showing how the waterproof cover is attached to the lamp housing.

FIG. 8 is a vertical cross-sectional view of the lamp with a waterproof cover attached.

FIG. 9 is an enlarged sectional view showing a second embodiment of the waterproof cover of the vehicular lamp of the present invention.

FIG. 10A is a perspective view of a waterproof cover according to a second embodiment, and FIG. 10B is a perspective view of the waterproof cover seen from an angle different from that of FIG.

11 is a plan view of the waterproof cover of FIG.

FIG. 12 is a perspective view showing a rear portion of the lamp housing.

FIG. 13 is a cross-sectional view of an essential part showing the relationship between the engagement protrusion and the square hole in the inner peripheral wall.

FIG. 14 is a perspective view showing how the waterproof cover is attached to the lamp housing.

FIG. 15 is a perspective view showing the removal of the waterproof cover from the lamp housing.

FIG. 16 is a cross-sectional view showing an example of a conventional waterproof cover of a vehicular lamp.

[Explanation of symbols]

 1 Vehicle Lamp 2 Lamp Housing 7 Light Bulb 9 Rear Wall 11 Circular Hole 12a Engagement Part 13 Waterproof Cover 14 Cover Main Part 20 Engagement Member 24 Engagement Part 13A Waterproof Cover 30 Engagement Part 31 Engagement Part

Claims (1)

[Scope of utility model registration request] 1. A waterproof cover of a vehicular lamp for waterproofing between a light bulb arranged in a lamp housing and an opening formed in a cylindrical rear wall of the lamp housing, the rear part of the lamp housing. A cover main part formed of a soft elastic material in a cylindrical shape so as to be fitted onto the wall, and an engaging part for engaging with an engaged part formed on the side surface of the rear wall of the lamp housing. A waterproof cover for a vehicular lamp, characterized in that it is integrally formed with a mating member, and an engaging portion projects toward the inside of the cover main portion.