JPH036964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a holding structure for a lamp bulb. Specifically, the present invention relates to a bulb holding structure for an automobile lamp whose bulb can be replaced.

[Conventional technology]

A typical conventional valve holding structure of this type is described in Japanese Patent Application Laid-Open No. 123653/1983.

Hereinafter, the above-mentioned valve holding structure will be explained with reference to FIGS. 11 and 12.

In the figure, reference numeral 1 denotes a reflector as a mounting body, and this reflector 1 is made of metal or synthetic resin, has an open front surface 10, and has a reflective surface 11 in the form of a paraboloid of revolution on the rear surface. An insertion hole 12 is opened in the center. A lens 13 made of glass or synthetic resin is bonded to the front opening 10 using an adhesive 14 or the like.

Reference numeral 2 denotes a cylindrical socket portion, and three spiral grooves 20 are provided on the outer circumferential surface of the socket portion 2 in the inner circumferential direction. This socket portion 2 is caulked and fixed to the periphery of the insertion hole 12 of the reflector 1.

Reference numeral 3 denotes a bulb, and this bulb 3 includes a glass tube 31 enclosing a filament 30, a cap portion 32 provided at the rear of the glass tube bulb 31, and a flange portion 33 integrally provided with the cap portion 32. , and a connector part 34 integrally projecting rearward from the flange part 33, and three notches 35 are provided in the flange part 33 corresponding to the entrances of the spiral groove 20 of the socket part 2.

Reference numeral 4 denotes a lock collar as a tightening device. This lock collar 4 has a cylindrical shape, and has three protrusions 40 near one end of the inner peripheral surface, the entrance of the spiral groove 20 of the socket part 2, and the collar part 33 of the valve 3. Notch 3
5. In addition, an appropriate number of elastic pieces 41, for example six pieces, are provided near the other end of the inner peripheral surface.

Thus, the glass bulb 31 side of the bulb 3 is inserted through the insertion hole 12 of the reflector 1 into the lamp chamber 15 defined by the reflector 1 and the lens 13. The flange 33 of the valve 3 is placed against the end face of the socket 2, and the notch 35 of the flange 33 of the valve 3 is aligned with the entrance of the spiral groove 20 of the socket 2. Next, attach the lock collar 4 to the connector part 34 of the valve 3.
The protrusion 40 of the lock collar 4 is opposed to the notch 35 of the flange 33 of the valve 3 and the entrance of the spiral groove 20 of the socket part 2. Then, while pressing the lock collar 4 toward the reflector 1 side,
The protrusion 4 of the lock collar 4 rotates clockwise in the figure.
0 is engaged with the closed end of the spiral groove 20 of the socket portion 2. As a result, the flange portion 33 of the bulb 3 is strongly pressed against the end face of the socket portion 2 by the elastic force of the elastic piece 41 of the lock collar 4, and the bulb 3 is removably attached to the reflector 1.

In addition, 23 in the figure is an O interposed between the inner circumferential surface of the socket portion 2 and the outer circumferential surface of the mouthpiece portion 32 of the valve 3.
It's a ring.

[Problem that the invention attempts to solve]

However, in the conventional lamp bulb holding structure described above, the bulb 3 is removably attached to the reflector 1 as a mounting body by the elastic action of the locking collar 4 as a fastening tool. A groove 20 is provided, a notch 35 is provided in the flange 33 of the valve 3, and a notch 35 is provided in the lock collar 4.
5, and an elastic piece 41 that presses the collar 33 against the end surface of the socket 2.
It is necessary to provide This makes the structure complicated. In addition, the lock collar 4 is attached to its elastic piece 41.
rotates while pressing against the elastic force of the reflector 1 to engage or disengage the protrusion 40 of the lock collar 4 with the spiral groove 20 of the socket portion 2,
Since the valve 3 is attached to and removed from the reflector 1, there are problems such as the operation is troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lamp bulb holding structure that is simple in structure, easy to install and remove, and is capable of absorbing dimensional variations in components and reliably holding the bulb.

[Means for solving problems]

The present invention is characterized in that a wedge-shaped receiving part is provided on the periphery of the insertion hole of the mounting body, a wedge-shaped insertion engagement part is provided in the tightening device, and a space is provided in the insertion engagement part. .

[Effect]

In this invention, when the valve is inserted into the insertion hole of the mounting body, by inserting and engaging the insertion engagement part of the tightening tool with the receiving part of the mounting body, the flange of the valve is attached to the mounting body by a wedge action. The valve can be removably attached to the mounting body by pressing against the peripheral edge of the insertion hole. Furthermore, the space in the insertion engagement portion of the tightening tool allows the insertion engagement portion to deform due to external force, thereby absorbing dimensional variations of the components.

〔Example〕

Hereinafter, one embodiment of a lamp bulb holding structure according to the present invention will be described with reference to FIGS. 1 to 10.

In the figure, reference numeral 5 denotes a reflector as a mounting body, and this reflector 5 is made of metal or synthetic resin, has an open front surface 50, and has a paraboloid of revolution reflective surface 51 on the rear surface. An insertion hole 52 is opened in the center. A lens 53 made of glass or synthetic resin is bonded to the front opening 50 using an adhesive 54 or the like.

Reference numeral 6 denotes a cylindrical socket portion integrally protruding rearward from the peripheral edge of the insertion hole 52 on the outer surface of the reflector 5. This socket portion 6 forms a part of the mounting body together with the reflector 5, and Concave portions 60 are provided at three locations, namely at the top and on both left and right sides slightly below.

Reference numeral 61 denotes a groove serving as a wedge-shaped receiving portion, which is provided approximately in the middle of both left and right sides of the socket portion 6 so as to form a wedge shape when viewed from the side. The rear wall is sloping, and its width decreases from top to bottom.

Reference numeral 7 denotes a bulb, and this bulb 7 includes a glass tube 71 enclosing a filament 70, a cap portion 72 provided at the rear of the glass tube bulb 71, and a flange portion 73 integrally provided with the cap portion 72. , and a connector portion 74 that integrally projects rearward from the flange portion 73 in an L shape, and three convex portions 7 on the periphery of the flange portion 73.
5 is provided in a protruding manner corresponding to the recess 60 of the socket portion 6.

Reference numeral 8 denotes a cleat as a tightening device, and this cleat 8 is plate-shaped and has a bifurcated shape from the middle to the lower end, and an insertion engagement portion 80 is formed in the bifurcated portion. The insertion engagement portion 80 has a wedge shape when viewed from the side, the front wall surface is vertical, the rear wall surface is inclined, and the width thereof decreases from top to bottom. A space 81 is provided in the insertion engagement portion 80.

57 is an O-ring interposed between the inner peripheral surface of the insertion hole 52 of the reflector 50 and the outer peripheral surface of the mouthpiece 72 of the valve 7.

Thus, the recess 60 of the socket part 6 and the valve 7
Insert the glass tube 71 of the bulb 7 into the lamp chamber 5 through the insertion hole 52 of the reflector 5 while aligning it with the convex portion 75 of the
6, and the flange 73 of the bulb 7 is brought into contact with the peripheral edge of the insertion hole 52 of the reflector 5. Next, the insertion engagement part 80 of the cleat 8 is inserted into the groove 61 of the socket part 6. Then, the socket part 6
Due to the wedge action between the groove 61 and the insertion engagement portion 80 of the cleat 8, the flange portion 73 of the bulb 7 is pressed against the peripheral edge of the insertion hole 52 of the reflector 5. As a result, the valve 7 can be detachably attached to the reflector 5.

Also, by pulling out the insertion engagement part 80 of the cleat 8 from the groove 61 of the socket part 6, the valve 7 can be removed.
can be removed from the reflector 5.

In this way, the valve 7 is removably attached to the reflector 5 by the wedge action between the insertion engagement part 80 of the cleat 8 and the groove 61 of the socket part 6. The structure is simple by simply providing the insertion engagement portion 80 on the cleat 8. Moreover, the insertion engagement portion 8 of the cleat 8
The valve 7 can be attached to or detached from the reflector 5 by simply inserting it into the groove 61 of the socket portion 6 or pulling it out, and the operation is easy.

Further, since the insertion engagement portion 80 of the cleat 8 has a space 81 therein, the insertion engagement portion 80 deforms when a certain amount of external force is applied thereto. As a result, dimensional variations in the components can be absorbed and the bulb 7 can be reliably held on the reflector 5. That is, due to variations in the dimensions of the parts, a gap may occur between the insertion engagement portion 80 of the cleat 8, the groove of the socket portion 6, and the collar 73 of the valve 7, and the cleat 8 may come off due to vibration or the like, or the cleat 8 may be difficult to insert. Able to solve difficult and difficult problems. Moreover, the internal space 81 can prevent the occurrence of sink marks, improve the dimensional accuracy of the cleat 8, and save material for the cleat 8.

FIGS. 10a, b, c, d, e, f, and g are partial sectional views showing modified examples of the insertion engagement portion of the cleat. A to f are provided with a partition wall 82 inside, and a space 81
It is divided into three parts. g indicates that a rib 83 is provided on the insertion engagement portion 80.

In the above-described embodiment, the connector portion 74 of the valve 7 is L-shaped, but it may be linear. Further, although the socket portion 6 is integrally provided to protrude from the reflector 5, the reflector 5 and the socket portion may be separate parts and assembled into one body.
Furthermore, the receiving portion provided on the reflector 5 (mounting body) may be a wedge-shaped guide rail in addition to the wedge-shaped groove 61 of the socket portion 6 described above.

[Effect of idea]

As is clear from the above, the bulb holding structure of the lamp of the present invention removably holds the bulb on the mounting body through the wedge action between the insertion engagement part of the tightening tool and the receiving part of the mounting body. The structure is simple, as the mounting body is provided with a receiving portion and the tightening device is provided with an insertion engagement portion. Moreover, the valve can be assembled to or removed from the pavement body simply by inserting or pulling out the insertion engagement portion of the tightening member into the receiving portion of the mounting body, and the operation is easy.

In particular, in the present invention, since a space is provided in the insertion engagement part of the tightening tool, the insertion engagement part is deformed by a certain amount of external force, and it is possible to absorb dimensional variations of the parts. Therefore, the valve can be securely held on the mounting body. Furthermore, sink marks can be prevented, the dimensional accuracy of the insertion engagement portion of the tightening tool can be improved, and materials can be saved.

[Brief explanation of the drawing]

1 to 10 show an embodiment of the lamp bulb holding structure according to the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a rear view of the assembled state, and FIG. 3 is a second embodiment of the lamp bulb holding structure.
Fig. 4 is a partial vertical sectional view of the reflector and socket section, and Fig. 5 is a sectional view taken along the line -
Figure 6 is a partial cross-sectional view of the reflector and socket part, Figure 7 is a side view of the cleat, Figure 8 is a rear view of the cleat, and Figure 9 is a cross-sectional view taken along the line - in Figure 8. Figure 10a,
b, c, d, e, f, g are partial sectional views showing modified examples of the tightening device. FIG. 11 is an exploded perspective view showing a conventional lamp bulb holding structure, and FIG. 12 is a vertical cross-sectional view of the assembled state. 5... Reflector (mounting body), 52... Insertion hole,
6...Socket part, 61...Groove, 7...Valve,
73... collar section, 8... cleat (tightening device), 80
...insertion engagement portion, 81...space.

Claims (1)

[Scope of utility model registration request] A mounting body with an insertion hole, a valve with a flange, and a tightening tool are provided.The valve is inserted into the insertion hole of the mounting body, and the tightening tool tightens the flange of the valve to the peripheral edge of the insertion hole of the mounting body. In the lamp bulb holding structure for removably holding the bulb on the mounting body by pressing the mounting body, a wedge-shaped receiving portion is provided at the peripheral edge of the insertion hole of the mounting body, and a wedge-shaped insertion engagement portion is provided on the tightening tool. What is claimed is: 1. A lamp bulb holding structure, characterized in that a space is provided in an insertion engagement portion of the fastener.