JP2644636B2 - Light bulb socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light bulb socket, and more particularly to a light bulb socket in which socket parts are commonly used for various light bulbs and the assembly is simplified.

[0002]

2. Description of the Related Art Conventionally, a light bulb socket used for a vehicle lamp has a structure in which a contact is internally supported inside a socket body. That is, an axial groove is formed in the peripheral portion of the socket body having a bottomed cylindrical shape, and the negative and positive contacts are fitted and supported in the groove. The negative contact has a part protruding a contact piece in the inner diameter direction so as to make electrical contact with the peripheral surface of the base of the bulb fitted into the socket body, and the positive contact has a part thereof formed in the socket body. The lamp is curved along the inner bottom surface so as to be in contact with the positive electrode provided at the tip of the base of the bulb.

[0003]

In such a conventional light bulb socket, each of the negative and positive contacts is fitted and supported in a groove provided in the socket body. However, the size of the contacts is small. There is a problem that the fitting operation is difficult. Also, since the contact is usually provided with a cut-and-raised piece so that the contact does not fall out from the inside of the groove and is locked to the inner surface of the groove, once the contact is inserted into the groove, it becomes difficult to remove it thereafter. Also, there is a problem that it is difficult to repair when a contact failure occurs.
Further, in the conventional light bulb socket, since the size and shape of the socket body are determined according to the bulb to be used, it is necessary to design and manufacture the socket body corresponding to each of the different light bulbs. In addition, there is a problem that manufacturing and management are complicated. SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem and to provide a light bulb socket in which parts are shared and assembly is simplified.

[0004]

SUMMARY OF THE INVENTION A light bulb socket according to the present invention has an outer piece formed into a bottomed tubular shape and attachable to a lamp, and a tubular inner end having both ends opened to be fitted into the outer piece. Make up the socket body with the piece,
A contact is held between the outer piece and the inner piece. In this case, a tongue is formed in the periphery of the inner piece so as to be formed in the axial direction and can be deformed in the radial direction, and a part of this tongue is fitted into a fitting hole provided on the peripheral surface of the outer piece. The inner projection is formed so as to fit and support the inner piece with the outer piece. In addition, at least one of the outer circumferential surfaces of the inner piece in the circumferential direction may be used.
Upper part and corresponding inner circumference of the outer piece
One or more points in the circumferential direction of the surface
A guide ridge extending in the direction is formed.
An axially extending guide groove engaged with the strip is formed,
When inserting the inner piece into the outer piece in the axial direction
Are configured so that they are fitted to each other.

[0005]

According to the present invention, it is possible to easily support the contact by inserting the inner piece into the outer piece after fitting the inner piece to the outer piece, and to easily detach the contact by removing the inner piece. . Further, by making the shape and size of the inner piece different, it is possible to use different light bulbs. further,
Fitting protrusion provided between inner piece and outer piece
Engagement of the protrusion with the fitting hole, and engagement of the guide ridge with the guide groove
Allows the inner piece to be stably fitted to the outer piece
Can be held, and the inner piece can be
Improve the assemblability when assembling to pieces.

[0006]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a partially exploded perspective view of one embodiment of the present invention.
1 is an outer piece, 2 is an inner piece, and these constitute a socket body. Reference numeral 3 denotes a contact provided in the socket body and electrically connected to the electric bulb.
The outer piece 1 is shown in a plan view in FIG. 2, FIG. 3 and FIG.
As shown in the sectional views taken along the line AA and the line BB, a circular flange 11 is integrally provided on the peripheral surface thereof, and a groove provided on the outer periphery of the flange 11 is provided. An annular gasket 12 can be supported on 11a. Further, a plurality of engaging projections 13 are provided at a plurality of circumferential locations separated from the flange 11 by a predetermined dimension in the axial direction. The flange 11 and the engagement projection 13 constitute a bayonet-shaped socket mounting portion, and can be fitted in a socket mounting hole opened in a lamp body (not shown) of the lamp to mount the bulb socket on the lamp body. . A wing-shaped operation piece 14 for rotating the bulb socket is integrally provided on the bottom surface of the outer piece 1.

[0007] Axial contact insertion grooves 15a, 15b, 15c are formed at three circumferential positions of the outer piece 1, and these contact insertion grooves 15a, 15b, 15c are respectively provided with a negative contact 31, which will be described in detail later. Two positive contacts 32 and 33 can be provided. Further, two axially protruding guide ribs 16 projecting in the inner diameter direction are provided at two circumferential positions different from the grooves 15a, 15b, 15c.
In addition, a square fitting hole 17 penetrating in the radial direction is formed at two circumferential positions different from this, and can be fitted to a fitting projection 24 described later of the inner piece 2.

FIG. 5 is a plan view of the inner piece 2,
As shown in the sectional view along the line C-C in FIG. 6, the outer piece 1 is formed as a cylindrical shape having both outer diameters slightly smaller than the inner diameter of the outer piece 1. Guide grooves 21 corresponding to the guide ridges 16 of the outer piece 1 are formed at two circumferential positions in the axial direction, and cut grooves formed at two different circumferential positions from the upper end opening in the axial direction. 22 by tongue 2
3 is formed, and a fitting projection 24 fitted into the fitting hole 17 of the outer piece 1 is integrally formed on the outer surface of the tongue piece 23. The tongue piece 23 is provided with some elasticity in the radial direction with respect to the peripheral wall of the inner piece 2 by the cut groove 22, and the fitting projection 24 can be moved in the radial direction by this elasticity. Further, in a part of a different circumference of the inner piece 2, a cut groove-shaped contact groove 25 corresponding to the insertion groove 15 a for housing the negative contact of the outer piece 1 is formed in the axial direction. Further, an inner surface of the inner piece 2 is formed with an engagement groove 26 having a J-shaped upper edge into which an engagement protrusion provided on a peripheral surface of a base of a light bulb (not shown) is inserted. Further, ridges 27 are formed at two places on the circumference of the inner piece 2 for holding the positive contacts 32 and 33 between the outer piece 1 and the positive contacts 32 and 33, respectively.

As shown in FIG. 1, the contact 3 is formed by bending a long and thin conductive plate having spring properties. The negative contact 31 has a contact piece 31a protruding outside through the insertion groove of the outer piece at one end, and a contact piece 31b protruding into the inner piece through the contact groove of the inner piece at the other end. Have. A cut-and-raised piece 31c is formed at the lower end. On the other hand, the two positive contacts 32, 33 have contact pieces 32a, 33a protruding outside through the insertion groove of the outer piece at one end, and are bent in an S-shape at the other end to form a base for a bulb. Have contact pieces 32b and 33b that are brought into contact with the positive electrode provided at the apex position.

Therefore, a light bulb socket constituted by using the outer piece 1, the inner piece 2 and the contact 3 is shown in FIG. 7 as a plan view and FIG. Insertion groove 15b, 1
After the positive contacts 32 and 33 are inserted into 5c, the negative contact 31 is locked to the inner piece 2, and the inner piece 2 is fitted into the outer piece 1, assembly becomes possible. At this time, after positioning in the circumferential direction so that the guide groove 21 of the inner piece 2 is fitted into the guide ridge 16 of the outer piece 1, the inner piece 2 is moved in the axial direction while moving the inner piece 2 in the axial direction. The tongue 23 of the inner piece 2 is elastically deformed in the inner diameter direction, and the fitting projection 24 provided on the tongue 23 goes over the inner edge of the outer piece 1 and fits into the fitting hole 17 from the inside. Then, the inner piece 2 can be integrated with the outer piece 1. In this state, each contact 3 is located between the inner piece 2 and the outer piece 1.
1, 32, 33 are clamped and firmly supported in the outer piece 1. At this time, the negative contact 31 causes the contact piece 31a to protrude outside from the insertion groove 15a of the outer piece 1, and the contact piece 31b protrudes into the inner piece 2 through the contact groove 25 of the inner piece 2.
The positive contacts 32, 33 are contact pieces 32b, 33b.
Are positioned on the inner bottom surface of the outer piece 1 and the contact pieces 32
a, 33a are projected outside through the insertion grooves 15b, 15c.

In this light bulb socket, a light bulb base is inserted into the inner piece 2 and an engaging projection 26 of the base is engaged with an engaging groove 26 provided in the inner piece 2 to attach the light bulb to the light bulb socket. Becomes possible. In this state, the peripheral surface of the base is in contact with the contact piece 31b of the negative contact 31.
And the two positive electrodes of the base are brought into contact with the respective contact pieces 32b and 33b of the positive contacts 32 and 33, respectively, to make electrical connection. Further, by using a socket mounting portion having a bayonet structure formed by a flange 11 and an engagement projection 13 provided on the outer piece 1, the wiring portion provided on the lamp side by being mounted on a lamp body of a lamp (not shown). And the contact pieces 31a, 32a, and 33a come into contact with each other to perform electrical connection.

Therefore, in this light bulb socket, when assembling the contacts 3, the contacts 3 are simply inserted into the insertion grooves 15b and 15c of the outer piece 1 and the insertion grooves 25 of the inner piece 2, and then the inner piece 2 is inserted into the outer piece. It is only necessary to fit into the piece 1, and the assembling property is improved. In addition, since the contact is sandwiched between the inner piece and the outer piece, it is easy to assemble the contact, and it is also easy to remove the contact once attached by repair or the like. Also, when using light bulbs with different caps, the same outer diameter can be used if inner pieces with the same outer diameter and different inner diameters are used, so only the inner piece is designed and manufactured. Manufacturing and management are facilitated. In addition, even when using a baseless bulb having no base, for example, a wedge-based bulb, a shape corresponding to this,
An inner piece having dimensions can be prepared.

[0013]

As described above, according to the present invention, an outer piece formed into a bottomed cylindrical shape, an inner piece fitted into the outer piece, and sandwiched between the outer piece and the inner piece. Since the light bulb socket is configured with the contacts, there is no need to provide a structure for preventing the contacts from falling off, and the structure of the contacts can be simplified, and the mounting and detaching of the contacts can be easily performed. Can be improved. Further, it is possible to cope with various light bulbs only by changing the inner piece to a different one, and there is an effect that the outer piece can be shared and the design and manufacture of the light bulb socket can be simplified. Furthermore, between the inner piece and the outer piece
The two pieces are assembled by the engagement between the fitting projections and the fitting holes.
It can be stably held in the attached state, and both pieces
The inner piece by the engagement of the guide ridge and the guide groove
Improve the assemblability when assembling to the outer piece
Becomes possible.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of one embodiment of the present invention.

FIG. 2 is a plan view of an outer piece.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a plan view of the inner piece.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a plan view of the light bulb socket.

FIG. 8 is a sectional view taken along line DD of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer piece 2 Inner piece 3 Contact 15a, 15b, 15c Contact insertion groove 16 Guide ridge 17 Fitting hole 21 Guide groove 24 Fitting protrusion 25 Contact groove 31 Negative contact 32, 33 Positive contact

Claims (1)

(57) [Claims] 1. A socket body comprising an outer piece formed into a bottomed tubular shape and attachable to a lamp, and a tubular inner piece having both ends opened to be fitted into the outer piece. The contact is sandwiched between the piece and the inner piece, and the periphery of the inner piece is
A tongue that can be deformed in the radial direction by forming an axial kerf
The fitting provided on the outer surface of the outer piece
Forming a fitting projection to be fitted into the mating hole, and
One or more circumferential points on the outer surface of the piece
One or more circumferential directions of the inner peripheral surface of the corresponding outer piece
, One of the guide ridges extending in the axial direction
Is formed on the other side, and is axially engaged with the guide ridge.
A guide groove is formed to extend through the inner piece.
When they are inserted into the
A light bulb socket characterized by the following configuration .