JP3141276B2 - Automotive lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a novel automotive lamp. More specifically, the present invention relates to a technique for firmly attaching a socket cover to a lamp body and increasing the degree of sealing in a lamp space.

[0002]

2. Description of the Related Art Some automotive lamps have a socket cover attached to the rear of a lamp body in order to increase the degree of sealing around the bulb and prevent water or dust from entering the lamp space.

FIG. 13 shows an example a of such a conventional automobile lamp, in which a lamp mounting hole c is formed substantially at the center of the rear part of a lamp body b, and a light bulb d is inserted in the lamp mounting hole c.
Is detachably attached. Here, e is a base of the bulb d.

Further, a cylindrical surrounding wall f is projected from the rear surface of the lamp body b so as to surround the bulb mounting hole c.
At the rear end of the surrounding wall f, an engaging edge g is provided to protrude outward continuously in the circumferential direction.

[0005] The socket cover h is attached to the lamp body b by externally fitting the outer peripheral wall i and the inner peripheral wall j to the surrounding wall f of the lamp body b and the base e of the bulb d. At this time, the engaging groove k provided on the inner peripheral surface of the outer peripheral wall i is engaged with the engaging edge g, and the front end l of the thinned outer peripheral wall i is attached to the rear surface of the lamp body b. It is designed to be in contact with the ball.

[0006]

However, in the above-described structure, since the outer peripheral wall i of the socket cover h is externally fitted to the surrounding wall f of the lamp body b, a thin outer peripheral wall is formed. The front end l of the wall i tends to open outward, and the front end l may not adhere to the lamp body b, and there is a problem that water or dust may enter the lamp space from there.

[0007]

According to the present invention, there is provided a lamp for an automobile.
To solve the above-mentioned problem, cover the front of the lamp body with a lens, attach a light bulb to the rear of the lamp body,
An automotive lamp for attaching a socket cover to a rear portion of a lamp body, wherein a cylindrical surrounding wall for externally fitting the socket cover is protruded at a position surrounding the light bulb mounting portion on the rear surface of the lamp body, and An inwardly protruding engaging edge is provided at an end portion, and the socket cover is externally fitted to a body fitting portion fitted to the surrounding wall and to a base of a light bulb inside the body fitting portion. A cylindrical bulb fitting wall is integrally formed, and the body fitting portion has a cylindrical fitting wall externally fitted to the surrounding wall and a cylindrical engagement located further inside the fitting wall. And an engaging ridge for engaging with the engaging edge is formed on the engaging wall.

Therefore, in the automotive lamp of the present invention,
An engaging edge protruding inward is protrudingly provided at the rear end of the surrounding wall, and the engaging edge and the engaging ridge of the socket cover are engaged from the inside of the surrounding wall. Without opening to the outside, the degree of adhesion between the lamp body and the socket cover is increased, and water or dust entering the lamp space can be eliminated.

Further, since the fitting wall does not open outward, and there is a clear response at the time of engagement between the engaging ridge of the inner engaging wall and the engaging edge of the surrounding wall, the socket cover is provided. It can be easily understood that the lamp is securely attached to the lamp body, the sense of moderation is improved, and an incomplete mounting can be eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the automotive lamp according to the present invention will be described below with reference to the illustrated embodiments.

FIGS. 1 to 8 show a first embodiment 1 in which the automotive lamp of the present invention is applied to a headlamp for an automobile.

Reference numeral 2 denotes a lamp body, which is formed by molding a synthetic resin and has a concave portion 3 opening forward, and the inner surface of the concave portion 3 is subjected to a reflection treatment to form a reflection surface 4. .

The reflecting surface 4 is formed, for example, from a paraboloid of revolution.

A lens 5 is attached to the lamp body 2 so as to cover the front opening.

Reference numeral 6 denotes a light bulb mounting hole formed in the center of the rear part of the lamp body 2. A light bulb 7 is detachably mounted in the light bulb mounting hole 6. Reference numeral 8 denotes a base of the light bulb 7.

At a position surrounding the bulb mounting hole 6 on the rear surface of the lamp body 2, a short cylindrical surrounding wall 9 is provided so as to project rearward.

In the rear surface of the lamp body 2, slits 10, 10, 10 extending in the circumferential direction at intervals in the circumferential direction are formed at positions in contact with the inner edge of the base end of the surrounding wall 9. .

The one slit 10 is located almost directly above,
The remaining two slits 10, 10 are located diagonally below.

Reference numerals 11, 11, 11 denote engagement edges projecting inward from positions circumferentially separated from the rear end of the surrounding wall 9, and the positions at which these engagement edges 11, 11, 11 are formed and The size is substantially the same as the position and size of the slits 10, 10, 10 as viewed from behind.

Therefore, as shown in FIG. 5, when molding the lamp body, a part 12, 12, 12 (only one is shown in the figure) of the mold located on the inner surface side of the lamp body 2 is slit 10. , 10 and 10 are inserted through the engaging edges 11, 11,
11, the engaging edges 11, 11, 11 which are means for ensuring the attachment of the socket cover to the lamp body 2, which will be described later, are formed simultaneously with the molding of the lamp body 2. This eliminates the need for a post-process after the molding of the lamp body 2 and can reduce the cost.

Reference numeral 13 denotes a socket cover made of an elastic material such as natural rubber or synthetic rubber.

The socket cover 13 has the same short cylindrical shape as the short cylindrical light bulb fitting portion 14, and the body fitting portion 15 having a larger diameter than the light bulb fitting portion 14 has a thin back wall 1.
6 integrally connected.

The bulb fitting portion 14 has a short cylindrical shape as described above, and has fine annular projections 17 and 1 on its inner peripheral surface.
Are formed over the entire circumference.

The body fitting portion 15 also has a short cylindrical shape as described above, and the outer peripheral fitting wall 1 connected at the rear end.
8 and an engagement wall 19 on the inner peripheral side, the length of the engagement wall 19 is less than half of the length of the engagement wall 18, and the engagement wall 19 is Fitting groove 2 opened forward between
0 is formed.

Further, a fitting wall 1 is provided at the front end of the engaging wall 19.
An engaging ridge 21 protruding toward 8 is formed continuously and integrally in the circumferential direction.

A large number of fine annular ridges 22, 22,... Are formed on the inner peripheral surface of the fitting wall 18 except for the rear end portion, similarly to the inner peripheral surface of the bulb fitting portion 14. Have been.

The rear wall 16 is annular and has a peripheral wall integrally formed forwardly from the outer peripheral edge and the inner peripheral edge thereof. As shown in FIG. The inner peripheral wall is connected to the outer edge of the rear end of the bulb fitting portion 14.

Numeral 23 denotes an eaves wall projecting rearward from the rear wall 16 and is formed to have a size such that it substantially covers the upper part of the base 8 of the bulb 7 when the socket cover 13 is attached to the lamp body. This is mainly used for pulling the socket cover 13 fitted to the lamp body 2 when removing the socket cover 13.

Thus, the above-described socket cover 13 is attached to the lamp body 2.

That is, the body fitting portion 15 is fitted over the surrounding wall 9, and the bulb fitting portion 14 is fitted over the base 8 of the light bulb 7.

At this time, the rear end of the surrounding wall 9 is fitted into the engaging groove 20 of the body fitting portion 15, and the engaging edges 11, 11, 11 of the surrounding wall 9 are engaged with the socket cover 13. Collar 2
1 and is in a state of being engaged therewith, whereby it becomes difficult for the socket cover 13 to come off from the surrounding wall 9, and at the same time, the degree of adhesion at the contact surface between the socket cover 13 and the lamp body 2 is increased.

That is, the ridges 17, 17, of the bulb fitting portion 14,
.. Are provided on the outer peripheral surface of the base portion 8 of the light bulb 7 and the body fitting portion 1.
Are strongly elastically contacted with the outer peripheral surface of the surrounding wall 9 so that their tips are crushed and adhered to each other, so that high waterproofness can be maintained in these portions. .

The socket cover 13 is provided with engaging edges 11, 11, 11 protruding inward from the surrounding wall 9 and engaging walls 19.
Has a double structure in which the engagement protrusion 21 is engaged inside both the surrounding wall 9 and the fitting wall 18 externally fitted to the surrounding wall 9, which affects the state of the surrounding wall 9 and the fitting wall 18. The surrounding wall 9 and the fitting wall 18 always work so as to be in close contact with each other. Therefore, for example, even when the fitting wall 18 of the socket cover 13 comes into contact with something and turns up when the headlamp 1 is attached to the vehicle body, the engaging edges 11, 11, 11 Engagement with the engagement ridge 21 does not disengage in a fixed state at all times, and is restored to a state where the surrounding wall 9 and the fitting wall 18 are in close contact again.

Further, when the engaging edges 11, 11, 11 are engaged with the engaging ridges 21, the engaging edges 11, 11, 11 are engaged after riding on the engaging ridges 21. It is easy to understand that the socket cover 13 is securely attached to the lamp body 2.

In the first embodiment, the engaging wall 19 of the socket cover 13 and the engaging ridge 21 formed on the engaging wall 19 are both continuous in the circumferential direction. However, the engaging edges 11, 11, 11 of the lamp body 2 with which the engaging ridges 21 are engaged are located at positions circumferentially separated from the rear end of the surrounding wall 9 by the positions and sizes of the slits 10, 10, 10. Therefore, both the engaging wall 19 and the engaging ridge 21 or only the engaging ridge 21 are aligned in the circumferential direction in accordance with the positions where the engaging edges 11, 11, 11 are formed. They may be formed apart from each other.

Next, a second embodiment of the present invention will be described.

FIGS. 9 and 10 illustrate a second embodiment 1A in which the automotive lamp of the present invention is applied to a headlamp.

The headlamp 1A according to the second embodiment described below differs from the headlamp 1 according to the first embodiment only in part in the shape of the lamp body and has the same socket cover. , The description of the socket cover is omitted by using the same reference numerals as those used for the socket cover 13 in the first embodiment.

Reference numeral 30 denotes a lamp body, which is formed by molding a synthetic resin and has a concave portion 3 which is opened forward.
1, the inner surface of the concave portion 31 is subjected to a reflection process to form a reflection surface 32.

The reflecting surface 32 is formed, for example, from a paraboloid of revolution.

A lens (not shown) is attached to the lamp body 30 so as to cover the front opening.

Reference numeral 33 denotes a light bulb mounting hole formed in the center of the lamp body 30, and a light bulb 34 is detachably mounted in the light bulb mounting hole 33. Reference numeral 35 denotes a base of the light bulb 34.

A short cylindrical surrounding wall 36 protrudes rearward at a position surrounding the bulb mounting hole 33 on the back of the lamp body 30.

Reference numeral 37 denotes an engaging edge which is continuously provided inward from the rear end of the surrounding wall 36 in the circumferential direction.

Next, attachment of the socket cover 13 to the lamp body 30 will be described.

That is, the body fitting portion 15 of the socket cover 13 is fitted to the surrounding wall 36, and the bulb fitting portion 14 is fitted to the base 35 of the bulb 34.

At this time, the rear end of the surrounding wall 36 is fitted into the engaging groove 20 of the body fitting portion 15, and the engaging edge 37 of the surrounding wall 36 is The socket cover 13 is positioned rearward and engaged therewith, so that the socket cover 13 does not easily come off the surrounding wall 36, and at the same time, the degree of adhesion of the contact surface between the socket cover 13 and the lamp body 30 is increased.

That is, the ridges 17, 17, of the bulb fitting portion 14,
.. Are in contact with the outer peripheral surface of the base portion 35 of the bulb 34, and the ridges 22, 22,... Of the body fitting portion 15 are in strong elastic contact with the outer peripheral surface of the surrounding wall 36, respectively. As a result, it is possible to maintain high waterproofness in these portions.

The engagement between the engaging edge 37 of the surrounding wall 36 of the lamp body 30 and the engaging ridge 21 of the socket cover 13 is performed over the entire circumference. The degree of adhesion at the contact surface becomes stronger, and the waterproofness is further improved.

FIG. 11 and FIG. 12 show a third embodiment of the automotive lamp according to the present invention.

The third embodiment differs from the first embodiment in that a rib is formed on the surrounding wall of the lamp body, and the socket cover is replaced with an engaging wall extending over the entire circumference. The only difference is that the inner wall is partially formed and the positioning projection is formed on the socket cover. The other parts are the same as in the first embodiment, so only the different parts are detailed. The other parts are denoted by the same reference numerals as those of the same parts in the first embodiment, and the description is omitted.

In the surrounding wall 9A provided on the rear surface of the lamp body 2, engaging edges 38, 38, 38 projecting inward are formed at the rear end of the surrounding wall 9A at a position almost directly above and obliquely below. The engaging edges 38, 38, 38 are respectively located on the rear side of the surrounding wall 9A, and are provided on an inclined surface 38a which is displaced toward the center of the surrounding wall 9A toward the front and a front end of the inclined surface 38a. A locking surface 38b which is continuous and substantially perpendicular to the axial direction of the surrounding wall 9A.

Are plate-shaped ribs, and the ribs 39, 39,... Are slits 10, 10,.
The surrounding wall 9A is located at a position along both edges in the longitudinal direction
And the outer edge of the portion of the lamp body 2 where the bulb mounting hole 6 is formed.

Body fitting portion 15 of socket cover 13A
Is composed of arcuate inner walls 40, 40, 40 connected at the rear end and a fitting wall 18 located outside the inner walls.
The reference numerals 0, 40, 40 are formed at positions corresponding to the positions where the engaging edges 38, 38, 38 are formed. Inner wall 4
Reference numerals 0, 40, 40 denote front-rear lengths of the fitting walls 41, 41, which are slightly less than half of those of the fitting wall 18, and which are opened forward between the fitting wall 18 and the inner walls 40, 40, 40. , 41 are formed.

At the front ends of the inner walls 40, 40, 40, engaging claws 42, 42, 42 projecting outward are formed, and the engaging claws 42, 42, 42 are located on the front side, respectively, and as they go rearward. It has an inclined surface 42a that is displaced toward the fitting wall 18 and a locking surface 42b that is continuous with the rear end of the inclined surface 42a and that is substantially perpendicular to the axial direction of the socket cover 13A.

Positioning projections 43, 43 project outward from portions of the outer surface of the fitting wall 18 which are located obliquely above.

On the back surface of the lamp body 2, a substantially arc-shaped protective wall 44 projects rearward so as to surround a portion of the surrounding wall 9A except for a portion located below the surrounding wall 9A.
The amount of rearward protrusion of the protective wall 44 is substantially half that of the surrounding wall 9A, and the positioning protrusions 43, 43
The portions 44a, 44a of the protective wall 44 corresponding to are formed in a concave shape that opens toward the center of the socket cover 13A so as to correspond to the outer shape of the positioning projections 43, 43.

The attachment of the socket cover 13A to the lamp body 2 is performed as follows.

The socket cover 13A is pushed in from the rear side such that the body fitting portion 15 is fitted to the surrounding wall 9A and the bulb fitting portion 14 is fitted to the base 8 of the bulb 7. Go out. At this time, the positioning projections 43, 43
Correspond to the portions 44a, 44a of the protective wall 44, positioning is easily performed.

Then, first, the inclined surfaces 42a of the engaging claws 42 of the respective inner side walls 40 and the inclined surfaces 38a of the respective engaging edges 38 of the surrounding wall 9A come into contact with each other. Further, when the socket cover 13A is pushed in, the engagement claws 42 are bent inward, and the engagement claws 42 that have been bent inward beyond the engagement edges 38 return to their original positions, and the locking surfaces The engagement surface 42b and the engagement surface 38b of the engagement edge 38 are engaged. And the surrounding wall 9A
The rear end portion is fitted in the fitting groove 41 of the body fitting portion 15. As a result, the socket cover 13A is attached to the lamp body 2
Is attached to the surrounding wall 9A.

The mounting of the socket cover 13A on the lamp body 2 is performed as described above.
5 is the surrounding wall 9A, and the bulb fitting part 14 is the base 8 of the bulb 7.
It can be done very simply by simply pushing the socket cover 13A from the rear side so that it fits outside.

When the socket cover 13A is attached to the lamp body 2, the surrounding wall 9A is sandwiched between the fitting wall 18 and the inner walls 40, 40, 40. Engagement claws 42, 4
2, 42 locking surfaces 42b, 42b, 42b and engaging edge 3
Since the engagement surfaces 38b, 38b, 38b of 8, 38, 38 are engaged, the mounting state is stable and the socket cover 13A does not fall off from the lamp body 2.

The ribs 39, 39,...
Are formed, the strength of the surrounding wall 9A is increased, and when the socket cover 13A is attached to the surrounding wall 9A, the ribs 39, 39,.
When the socket cover 13A rotates in the circumferential direction with respect to the surrounding wall 9A by contacting the circumferential ends of the socket 40, the engagement between the engaging claws 42, 42, 42 and the engaging edges 38, 38, 38 is established. Deterioration is prevented.

[0064]

As is apparent from the above description, according to the first aspect of the present invention, an inwardly protruding engaging edge is provided at the rear end of the surrounding wall to protrude therefrom. The structure is such that the engaging ridges of the edge and the socket cover engage from the inside of the surrounding wall, so that the fitting wall does not open outward and the degree of adhesion between the lamp body and the socket cover increases, and the lamp body enters the lamp space. The entry of water and dust can be eliminated. In addition, since the fitting wall does not open outward, and there is a clear response at the time of engagement between the engaging ridge of the inner engaging wall and the engaging edge of the surrounding wall, the socket cover is provided with the lamp body. It can be easily understood that it is securely attached, the moderation feeling is improved, and the halfway attachment can be eliminated.

According to the second aspect of the present invention, since a large number of small annular projections are formed on the inner peripheral surface of the fitting wall of the body fitting portion of the socket cover, the projections surround the lamp body. The outer peripheral surfaces of the wall are strongly resiliently contacted with each other so that the ends thereof are crushed, so that high waterproofness of these portions can be maintained.

According to the third aspect of the present invention, since a large number of small annular ridges are formed on the inner peripheral surface of the bulb fitting portion of the socket cover, these ridges are formed on the outer peripheral surface of the base portion of the bulb. ,
It is in a state where the tip is crushed and comes into close contact,
Therefore, high waterproofness can be maintained in these portions.

According to the fourth aspect of the present invention, a plurality of circumferentially extending slits are formed at positions along the inner edge of the surrounding wall of the lamp body and separated from each other in the circumferential direction. Since the position and the size correspond to the engaging edge, the engaging edge can be formed simultaneously with the molding of the lamp body, so that a post-process after the molding of the lamp body is not required and the cost is reduced. be able to.

According to the fifth aspect of the present invention, since the rib is formed at a position along the both ends in the longitudinal direction of the slit on the inner edge of the surrounding wall, the strength of the surrounding wall can be increased.

According to the sixth aspect of the present invention, since the engaging wall of the socket cover is formed at a position corresponding to the slit, when the socket cover is attached to the surrounding wall, the engaging wall of the socket cover is formed. Thus, the socket body is surrounded by the engaging edge of the lamp body, the surrounding wall and the rib, so that the socket cover can be prevented from easily coming off the lamp body.

The specific shape and structure of each part shown in each of the above embodiments are merely examples of the embodiment of the present invention, and the technical scope of the present invention is not limited thereto. Should not be interpreted restrictively.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of an automotive lamp according to the present invention together with FIGS.
FIG. 1 is a horizontal sectional view.

FIG. 2 is a II view in FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2;

FIG. 4 is an IV view of FIG. 3;

FIG. 5 is an enlarged sectional view of a main part showing a molding state of a lamp body.

FIG. 6 shows a socket cover together with FIGS. 7 and 8, which is a rear view.

FIG. 7 is a front view.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.

FIG. 9 shows a second embodiment of the automotive lamp according to the present invention together with FIG. 10, which is an enlarged longitudinal sectional view.

FIG. 10 is a rear view showing a state where a socket cover is removed.

FIG. 11 shows a third embodiment of the automotive lamp according to the present invention together with FIG. 12; FIG. 11 shows a state before the socket cover is attached to the lamp body; FIG.

FIG. 12 is a longitudinal sectional view showing a state where a socket cover is attached to the lamp body.

FIG. 13 is a cross-sectional view of a main part showing an example of a conventional automotive lamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Head lamp (automotive lamp), 2 ... Lamp body, 5 ... Lens, 6 ... Bulb mounting hole (bulb mounting part),
7: bulb, 8: base, 9: surrounding wall, 10: slit, 11: engaging edge, 13: socket cover, 14
... light bulb fitting part (bulb fitting wall) 15 ... body fitting part
17 ... ridge, 18 ... fitting wall, 19 ... engaging wall, 21
… Engaging ridge, 1A… head lamp (automotive lamp),
Reference Signs List 30 lamp body 33 light bulb mounting hole 34 light bulb 35 base part 36 surrounding wall 37 engagement edge
9A: Surrounding wall, 13A: Socket cover, 39: Rib

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-368701 (JP, A) JP-A-4-38603 (JP, U) JP-A-3-109202 (JP, U) JP-A-4-6- 68212 (JP, U) Jikken Hei 2-47527 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 8/10 F21V 19/00

Claims (6)

(57) [Claims] 1. An automobile lamp in which a front of a lamp body is covered with a lens, a light bulb is mounted on a rear part of the lamp body, and a socket cover is mounted on a rear part of the lamp body, wherein the light bulb mounting part on a rear surface of the lamp body is surrounded. A cylindrical surrounding wall for externally fitting the socket cover is protruded at a position, and an engaging edge protruding inward is protruded at a rear end of the surrounding wall. The socket cover is fitted to the surrounding wall. A body fitting portion and a cylindrical bulb fitting portion that is fitted inside the base portion of the light bulb inside the body fitting portion are integrally formed, and the body fitting portion is fitted over the surrounding wall. A cylindrical engagement wall and a cylindrical engagement wall located further inside the engagement wall, wherein the engagement wall is formed with an engagement protrusion that engages with the engagement edge. An automotive lamp characterized by the following. 2. The automotive lamp according to claim 1, wherein a number of small annular projections are formed on an inner peripheral surface of a fitting wall of a body fitting portion of the socket cover. 3. The automotive lamp according to claim 1, wherein a large number of small annular ridges are formed on an inner peripheral surface of the light bulb fitting portion of the socket cover. 4. A plurality of circumferentially extending slits are formed at positions along the inner edge of the surrounding wall of the lamp body and separated from each other in the circumferential direction. 2. The vehicle lighting device according to claim 1, wherein the vehicle lighting device is adapted to the following. 5. The automotive lamp according to claim 4, wherein ribs are formed at positions along both longitudinal edges of the slit on the inner edge of the surrounding wall. 6. The automotive lamp according to claim 4, wherein the engagement wall of the socket cover is formed at a position corresponding to the slit.