JP2004231152A - Vehicular room lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive vehicular room lamp with a circuit formed by a bus bar and, particularly, making bulb holders easy to fit for elastically holding a bulb. <P>SOLUTION: One of the pair of bulb holders for holding the bulb is formed of an elastic member having a bent portion in which a conductive plate can be sandwiched. In the state that the bulb holder is held in the conductive plate, the conductive plate and the bulb holder are both fixed to a base by caulking a rib arranged on a lamp base portion. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle interior light in which a circuit is configured by a bus bar, and more particularly to an assembly structure of a bulb holder.
[0002]
[Prior art]
Many interior lamps for automobiles that use a bus bar method in which a conductive plate integrated with a bridge is fixed to the base of the lamp in advance and a circuit is formed by cutting the bridge at the same time are advantageous in terms of cost. I have. Further, in a bus-bar type lamp, a boat-shaped bulb is particularly often used as a light source in many cases because of the ease of disposing the lamp components. In the holding structure of the boat-shaped valve, holders are arranged opposite to both ends in the longitudinal direction of the valve, at least one of the holders is formed of an elastic member, the valve is elastically held, and electrical connection with the valve holder is established. This makes it easy to replace valves.
[0003]
The following is known about the mounting structure of a valve holder.
[Patent Document 1] JP-A-2-6246 (FIG. 1)
[Patent Document 2] Japanese Patent Application Laid-Open No. 8-276457 (FIG. 14)
In FIG. 1 of JP-A-2-6246, a spring-loaded valve holder is mounted on a conductive plate integrated with a bridge in advance by welding and then fixed to a base portion. In FIG. 14 of JP-A-8-276457, a conductive plate forming a circuit and a pair of valve holders are integrally formed.
[0004]
[Problems to be solved by the invention]
In the method shown in FIG. 1 of JP-A-2-6246, equipment and a jig for fixing the bulb holder are required in addition to equipment and a jig for fixing the conductive plate to the lamp base. In the method shown in FIG. 14 of JP-A-8-276457, a pair of valve holders is integrated with a conductive plate forming a circuit, so that pre-assembly of the valve holder to the conductive plate is unnecessary, and the number of assembly steps is reduced. Although advantageous in point, it is necessary to hold the valve electrically, so that the conductive plate necessarily uses a material having a spring property. Accordingly, since the entire conductive plate is formed of a material having spring properties, springback occurs after press molding, and it is difficult to ensure dimensional accuracy. As a result, the cost was higher than the steel plate.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a vehicle interior light having an easily assembled and inexpensive bulb holder mounting structure. It is in.
[0006]
[Means to solve the problem]
In order to achieve the above object, the present invention has a base portion, a conductive plate fixed to the base portion to form a circuit, a boat-shaped bulb (light source), and opposed to each other while holding both ends in the longitudinal direction of the boat-shaped bulb. A vehicle interior light comprising a pair of bulb holders, wherein at least one of the bulb holders made of an elastic member is composed of a bulb holding portion and a connection portion fixedly contacting with the conductive plate; The connection portion of the conductive plate and the hole fixed to the base portion and the conductive plate is formed by inserting a conductive plate, and an extended portion is formed so as to be able to be pinched, and in the portion of the conductive plate sandwiched by the valve holder, A hole fixed to the insertion guide portion and the base portion of the valve holder is formed, and the valve holder and the conductive plate are integrally provided on the base portion in a state where the valve holder is sandwiched by the conductive plate. And technical features that are fixed by caulking ribs.
[0007]
Further, a locking portion is formed at a connection portion of the valve holder which is made of an elastic member and is fixed to the conductive plate in contact with the conductive plate, and a hole is formed at a corresponding portion of the conductive plate. It is a technical feature that the positioning means of the valve holder is configured to be fitted into and locked to the valve holder.
[0008]
In the vehicle interior light described above, the pre-assembly is completed simply by inserting the bent portion of the bulb holder into the conductive plate integrated via the bridge. Thereafter, the conductive plate with the valve holder interposed therebetween is temporarily placed on the base portion, and the conductive plate itself and the valve holder are fixed to the base portion at the same time as the bridge is cut, so that the assembling becomes easy. In addition, since a dedicated device for assembling the bulb holder is not required, the lamp can be manufactured at low cost.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a perspective view of a valve holder 1 for elastically holding a valve, and FIG. 1B is a cross-sectional view of a locking hook 1g for positioning the valve holder 1 with a conductive plate and a mounting hole 1c. . The valve holder 1 is made of stainless steel, has springiness along with conductivity, has a substantially inverted U-shaped bent portion 1a, and has a boat-shaped valve cone near its distal end (free end side). A hole 1d into which the end is inserted is provided to form a valve holding portion 11.
[0010]
A rectangular flat portion 1e extending in the direction perpendicular to the terminal end of the inverted U-shaped portion and having substantially the same width as the conductive plate is provided. The hole 1c used for caulking together with the conductive plate 2 in the base portion 3 is flat. Two bent extension portions 1b and 1b are provided in the portion 1e so as to be able to sandwich the conductive plate 2 from both ends in the longitudinal direction of the flat portion 1e toward the back surface. Naturally, the gap x at the open end of the bent portion 1b is set to be equal to or less than the thickness of the conductive plate, and the open end portion 1f is bent slightly in a V-shape for the purpose of facilitating insertion of the conductive plate. Open more than the thickness of the conductive plate 2. Thus, the connection portion 12 to the conductive plate 2 is formed. Further, locking hooks 1g and 1g for positioning with the conductive plate 2 are formed on the edge of the flat portion 1e on the side of the bending extension 1b toward the bending direction. In the present embodiment, two bending extension portions 1b and two locking hooks 1g are provided, but one each may be provided.
[0011]
The conductive plate will be described with reference to FIG. 2 (a perspective view of the conductive plate 2), FIG. 3 (a perspective view in the middle of assembly), and FIG. The conductive plate 2 is manufactured by pressing an electrogalvanized steel plate, and a plurality of conductive plates are integrated via bridges 2d provided at a plurality of locations shown in FIG. At the portion of the valve holder 1 where the bent extension portion 1b is inserted, two projecting projections 2a are provided to protrude. Along with the valve holder 1, the base portion 3 is provided with holes 2b used for caulking together and positioning square holes 2f, 2f into which the locking hooks 1g of the valve holder 1 are fitted and locked. As shown in FIG. 3, holes 2 c used for fixing other portions of the conductive plate 2 to the base portion 3 are provided at a plurality of locations. Further, as shown in FIG. 4, another valve holder 2e for holding the valve is formed integrally with the conductive plate at a position opposite to the position where the valve holder 1 is inserted.
[0012]
The base 3 of the lamp will be described with reference to FIG. The base portion 3 is made of a synthetic resin, and at a portion where the valve holder 1 is disposed together with the conductive plate 2, a concave portion 3 b is provided at a corresponding position to avoid interference with the bent extension portion 1 b of the valve holder. 3b is formed. A rib 3a is provided for the purpose of caulking the valve holder and the conductive plate together, and a rib 3d is provided corresponding to the hole 2c provided on the conductive plate 2 for appropriately caulking other portions of the conductive plate to the base 3. , Each of which is disposed at a plurality of locations. Further, a plurality of square holes 3c are formed corresponding to the cut portions of the bridge 2d of the conductive plate.
[0013]
Next, an assembling method will be described with reference to FIGS. First, the valve holder 1 is inserted along the guide 2a of the conductive plate 2 integrated via the bridge 2d. As shown in the cross-sectional view of FIG. 3B, when the valve holder 1 is continuously pushed down to the last end, the locking hooks 1g, 1g of the valve holder 1 are connected to the square holes 2f, 2f provided in the conductive plate 2. And the position in the insertion direction of the valve holder 1 is determined. That is, the hole 2b of the conductive plate 2 is aligned with the hole 1c of the valve holder 1, and the positioning with the corresponding other valve holder 2e is completed as shown in the cross-sectional view of FIG. Will be.
[0014]
Next, the ribs 3a and 3d of the base portion 3 are inserted into the holes 2b and 2c of the conductive plate 2 with the valve holder 1 sandwiched therebetween, and are temporarily placed on the base portion 3. Then, as shown in FIGS. 4A and 4B, the ribs 3a and 3d are crushed by press working, and the valve holder 1 and the conductive plate 2 are caulked and fixed to the base portion 3, and at the same time, the conductive plate 2 Bridges 2d arranged at a plurality of locations are cut by press working, and are folded and stored in square holes 3c of base portion 3. In this state, a circuit is formed only after the integrated conductive plate 2 is separated.
Finally, the valve 4 is inserted and held in the valve holder 2e formed integrally with the conductive plate 2 and the valve holder 1, and the operation between these ends.
[0015]
Next, a modification of the valve holder 1 is shown in FIG. 5 as another embodiment. In the above-described embodiment, the bent extension portion 1b is provided so that the conductive plate can be inserted and clamped from the bulb holding direction side. However, depending on the arrangement condition of the lamp, the bent extension portion 1b may be provided so that it can be inserted from the opposite direction. .
[0016]
Next, a modification of the conductive plate 2 is shown in FIG. In the above-described embodiment, the guide is formed so as to protrude in the width direction of the conductive plate. However, depending on the yield of materials and circuit arrangement conditions, a notch may be provided and the step portion may be used as the guide.
[0017]
【The invention's effect】
In the above-described vehicle interior light having the bulb holder assembly structure of the present invention, only one of the pair of bulb holders having elasticity is inserted into the integrated conductive plate via the bridge. Since the position of the valve holder is easily determined, the pre-assembly is easily completed. Then, in the next step, assembling and fixing (caulking) of the conductive plate and the valve holder to the base at the same time as cutting the bridge of the conductive plate is completed, so special equipment (press, etc.) and a jig at the time of pre-assembly become unnecessary. . In addition, since the valve holder connection portion and the conductive plate are tightly fixed to each other by caulking, a more reliable energizing performance with respect to vibration transmitted from the vehicle can be obtained as compared with simply inserting the conductive member into the conductive plate. Further, the expensive spring material is used only for the necessary parts, which makes it possible to manufacture easily and inexpensively. Even when the product is disassembled, the valve holder is simply inserted into the conductive plate, so that the valve holder can be easily separated from the conductive plate, and can be easily recycled for use in recent years.
[Brief description of the drawings]
FIG. 1 is a perspective view and a partial cross-sectional view of a valve holder. FIG. 2 is a perspective view of a valve holder insertion portion of a conductive plate. FIG. 3 is a perspective view in the middle of assembly and an enlarged cross-sectional view of a locking hook portion of the valve holder. 4 is an assembled sectional view and an enlarged sectional view of a swaged portion of the valve holder. FIG. 5 is another embodiment of the valve holder. FIG. 6 is another embodiment of the conductive plate.
DESCRIPTION OF SYMBOLS 1 Valve holder 2 Conductive plate 3 Base part 4 Valve 11 Valve holder of valve holder 12 Connection part of valve holder

Claims (2)

A base portion, a conductive plate fixed to the base portion to form a circuit, a boat-shaped bulb (light source), and a pair of bulb holders disposed opposite to each other while holding both longitudinal ends of the boat-shaped bulb;
At least one of the bulb holders made of an elastic member is a vehicle interior light comprising a bulb holding portion and a connecting portion that is fixedly contacted with the conductive plate,
In the connection portion of the valve holder, a hole fixed to the conductive plate and the base portion and an extended portion that is bent so as to be able to be sandwiched by inserting the conductive plate is formed,
A hole fixed to the insertion guide portion and the base portion of the valve holder is formed in a portion of the conductive plate sandwiched by the valve holder,
An interior light for a vehicle, wherein the valve holder and the conductive plate are fixed by caulking of the same rib integrally provided on the base portion in a state where the valve holder is held by the conductive plate. A locking portion is formed at a connection portion of the valve holder which is made of an elastic member and is fixed to the conductive plate in contact with the conductive plate, and a hole is formed at a corresponding portion of the conductive plate,
2. The vehicle interior light according to claim 1, wherein the locking portion is fitted and locked in the hole of the conductive plate to form a valve holder positioning means.

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