JPH0637591Y2 - Wedge base bulb socket - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a socket for a wedge-based light bulb, and more particularly to a socket for facilitating assembling of a contact in a socket body.

[Conventional technology]

2. Description of the Related Art Conventionally, a wedge-based light bulb and its socket used for a vehicle lighting device are configured as shown in FIG.
That is, in the wedge base light bulb 21, the flat base portion 23 is made of glass integrated with the bulb portion 22, and the lead wire connected to the filament in the bulb portion 22 is used.
25 is exposed and arranged on the base portion 23. Further, a projection 26 for engagement is integrally formed on a part of the base portion 23.

On the other hand, the socket 1A has a socket body 2 formed by molding an insulating material such as resin, and the socket body 2 has a plurality of contacts 3 housed in a light bulb mounting portion 4 having a flat tubular shape. The lead wire 25 of the wedge base light bulb 21 fitted and supported in the opening of No. 4 is brought into contact with a part of the contact 3 to make an electrical connection.

Here, the contact 3 is supported by being fitted into the guide groove 5 provided on the inner surface of the light bulb mounting portion 4, and the contact portion 3c bent and formed on the contact 3 is connected to the lead wire.
The electric bulb 21 is prevented from coming off by bringing the electric bulb 21 into contact with 25 for electrical connection, and similarly, the pressing portion 3d formed by bending the contact 3 is engaged with the protrusion 26 provided on the base portion 23. Further, the cord 10 connected to the contact 3 is pulled out to the outside through a hole provided in a sealing bush 9 which is press-fitted into a sleeve 8 provided in the lower portion of the socket body 2.

Incidentally, reference numerals 12 and 13 are a flange and a cylindrical portion which constitute a mounting portion for attaching the socket body 2 to a lamp body (not shown), and have a bayonet structure.

[Problems to be solved by the device]

In such a conventional socket, the contact 3 is inserted upward from the lower opening of the socket body 2, and the contact 3 is fitted into the guide groove 5 provided on the inner surface of the light bulb mounting portion 4 to perform the assembly. ing. At this time, contact 3
If the insertion posture of the
It will not be guided inside and the contact 3 cannot be fitted into the guide groove 5 in a normal state. For this reason, it becomes necessary to perform the mounting work of the contact 3 again, and the mounting work becomes complicated and troublesome.

Further, in the conventional socket, when there is a dimensional variation between the insertion position of the contact 3 and the position of the guide groove 5, the tip side of the contact 3 falls inward as shown by the phantom line in FIG. There is also a problem that in this attached state, the pressing portion 3d of the contact 3 is deformed as shown by the solid line in the figure by interfering with the base portion 23 of the inserted light bulb 21 in this attached state.

An object of the present invention is to provide a socket that solves these problems, facilitates assembly, and prevents contact deformation.

[Means for Solving the Problems]

In the socket of the present invention, a guide groove for fitting and supporting a contact is formed on the inner surface of the socket body with the center side of the socket body open, and the lower part of the socket body is located at the lower end side of the guide groove. The guide frame that contacts the contact fitted in the guide groove and guides the contact into the guide groove, and measures the dimension from the groove bottom surface of the guide groove to the hole of the bush when the contact is mounted in the normal position. It is larger than the size of the cord.

[Action]

According to the present invention, when the contact is mounted in the normal position, the dimension from the groove bottom surface of the socket main body supporting the contact to the hole formed in the bush for inserting the cord to which the contact is connected is provided. By increasing the size of the cord until it is located in the socket, the contact can be attached while abutting against the inner surface of the socket body, preventing the contact from falling inside and interfering with the bulb base. To prevent.

Further, by guiding the contact into the guide groove by the guide frame, the contact can be surely assembled.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

1 to 7 are views showing an embodiment of the present invention,
Here, an example applied to a socket for a wedge-based light bulb having a double filament structure is shown.

FIG. 1 is a partially exploded perspective view of a part of an embodiment of the present invention. In the figure, 21 is a wedge-based light bulb, which has a flat base portion 23 formed integrally of glass with a bulb portion 22, and a double filament 24 in the bulb 22 is connected to both side surfaces of the base portion 23. The pair of lead wires 25 are exposed and are provided along the opposite surfaces of the base portion 23.
Further, a protrusion 26 is integrally formed on a part of the surface of the base portion 23 so that the protrusion 26 is engaged with a pressing portion 3d of the contact 3 which will be described later and is prevented from coming off.

Further, FIG. 2 is a vertical cross-sectional view showing a state in which a light bulb is attached, and FIG.
As shown in the sectional view taken along the line AA in the figure and the sectional view taken along the line BB in FIG. 2 in FIG.
Is a socket body 2 formed by molding an insulating material such as resin, and a contact 3 made of a metal material and embedded in the socket body 2. Here, the first to third three contacts 3A, 3B,
Composed of 3C and. The socket body 2 is the base part of the light bulb 21.
It has a flat cylindrical light bulb mounting portion 4 corresponding to 23, and the contact 3 is internally provided in the light bulb mounting portion 4, and the base portion 23 of the wedge base light bulb 21 is fitted and supported in the tip opening. Is configured as follows. A guide groove 5 for fitting and supporting the contact 3 is provided on an inner surface of the light bulb mounting portion 4, and a step portion 6 is engaged with a check piece 3b described later.
Is formed. In addition, a guide frame 7 is integrally formed in the lower portion of the light bulb mounting portion 4 so as to face the guide groove 5 and partition the internal space of the light bulb mounting portion 4.

Further, a circular sleeve 8 is integrally formed in the lower portion of the socket body 2, and a disk-shaped bush 9 made of rubber or the like is press-fitted into the sleeve 8 to seal the inside of the sleeve 8. . This bush 9 has the contact 3
A hole 11 is provided for inserting a cord 10 connected to the.

Furthermore, a circular flange is provided on the outer middle part of the socket body 2.
An annular gasket (not shown) is fitted on the flange 12 and has an opening edge of a lamp body (not shown) on the outer peripheral surface of the lamp body. An engaging piece 14 having a bayonet structure to be engaged is integrally formed.

The three contacts 3A, 3B, 3C are bent and formed in different shapes, as can be seen from FIG. The first contact 3A is bent in a U-shape, a side edge portion 3a of which is fitted into the guide groove 5 is provided in a part of the first contact 3A, and the step portion 6 can be engaged with the other part of the first contact 3A. The locking piece 3b is cut and raised downward. In addition, the contact portions 3c that come into contact with the lead wires 25 of the light bulb 21 are bent and formed on both side pieces, and the pressing portion that engages with the projection 26 of the electrode base portion 23 is formed on one side piece.
3d is bent and formed. Further, as shown by attaching the same reference numerals to corresponding portions, the second contact 3B and the third contact 3B
Each of the contacts 3C is formed in a substantially flat plate shape, and each side is provided with a side edge portion 3a fitted in the guide groove 5, and a locking piece 3b engaged with the step portion 6 is cut and raised. further,
A contact portion 3c that comes into contact with the lead wire 25 is bent and formed on each of them, and a pressing portion 3d is bent and formed on the second contact 3B.

A cord 10 is caulked and fixed to each of the three contacts 3A, 3B, 3C, and the cord 10 is led out of the socket body 2 through the hole 11 of the bush 9. Here, as shown in FIGS. 2 and 5, the hole 11 formed in the bush 9 is formed when the contact 3 is properly mounted in the guide groove 5 and is mounted along the inner surface of the light bulb mounting portion 4. ,
The cord 10 connected to the contact 3 is opened at a position where the cord 10 is slightly biased toward the center of the sleeve 8. That is, the dimension 1 from the inner surface of the bulb mounting portion 4 to which the contact 3 is attached to the hole 11 is made slightly larger than the conventional dimension 12 (see FIG. 8).

According to this structure, when assembling the contacts 3 into the socket body 2, the contacts 3 are inserted from below through the sleeve 8 into the bulb mounting portion 4, and the side edge portions 3a of the respective contacts 3 are fitted into the guide grooves 5. By attaching the check piece 3b to the step portion 6, attachment can be realized. At this time, as shown in FIG. 6, the contact 3 contacts the front surface of the contact portion 3c with the guide frame 7 in the lower portion of the light bulb mounting portion 4, and the guide frame 7 displaces the contact 3 rearward. Therefore, it is possible to guide the side edge portion 3a of the contact 3 into the guide groove 5 and securely mount it. Further, by this, the check valve 3b is surely engaged with the step portion 6 and the drop thereof is surely prevented.

On the other hand, after attaching the contact 3 to the light bulb mounting portion 4,
When the bush 9 is press-fitted into the sleeve 8, the hole 11 is located closer to the center than the normal position of the contact 3. Therefore, as shown in FIG. F acts to prevent the contact portion 3c and the pressing portion 3d from being held in a position along the inner surface of the light bulb mounting portion 4 and tilting inward. Therefore, when the light bulb 21 is mounted, it is possible to avoid the base portion 23 from interfering with the pressing portion 3d,
The pressing portion 3d is prevented from being deformed.

Here, the above-described embodiment shows an example in which the present invention is applied to a light bulb socket for a wedge-based light bulb having a double filament structure, but it can be similarly applied to a socket for a wedge-based light bulb having a single filament structure. .

[Effect of device]

As described above, according to the present invention, the dimension from the groove bottom surface of the guide groove of the socket body to the hole provided in the bush is larger than the dimension until the cord is positioned when the contact is mounted in the normal position. Therefore, the contact can be attached while being in contact with the inner surface side of the socket body, preventing the contact from falling inward, preventing interference with the bulb base part, and preventing contact deformation. You can

In addition, by forming a guide frame for guiding the contact in the guide groove in the lower portion of the socket body, there is an effect that the contact can be surely assembled.

[Brief description of drawings]

1 is a partially exploded perspective view of a part of an embodiment of the present invention, FIG. 2 is a vertical sectional view of a socket with a light bulb attached, and FIG. 3 is a sectional view taken along line AA of FIG. Fig. 4, Fig. 4 is a sectional view taken along the line BB in Fig. 2, Fig. 5 is a bottom view of the socket, and Fig. 6 is a sectional view of an essential part showing a state during attachment of contacts, and Fig. 7
Similarly, FIG. 8 is a sectional view of a main part, FIG. 8 is a sectional view of a socket for a general wedge-based light bulb, and FIG. 9 is a partial sectional view for explaining one of conventional problems. 1 ... Socket, 2 ... Socket body, 3 (3A, 3B, 3C)
...... Contact, 3a ...... side edge, 3b ...... check piece, 3c …… abutment part, 3d …… pressing part, 4 …… bulb mounting part, 5 …… guide groove, 6 …… step part, 7 ...... Guide frame, 8 …… Sleeve, 9
...... Bush, 10 ...... cord, 11 ...... hole, 12 ...... flange, 13 ...... cylindrical part, 14 ...... engaging piece, 21 ...... wedge base bulb, 22 ...... valve part, 23 ...... base part , 24 …… double filament, 25 …… lead wire, 26 …… protrusion.

Claims (1)

[Scope of utility model registration request] 1. A contact for contacting a lead wire provided on a base portion of a wedge base light bulb fitted in a socket body is attached along an inner surface of the socket body, and a cord connected to the contact is used as a socket. In a socket that is led out to the outside through a hole of a bush fitted in the main body, a guide groove for fitting and supporting the contact is formed on the inner surface of the socket main body with the center side of the socket main body being open, and A guide frame is formed at a lower portion of the guide groove at a lower end side of the main body and contacts a contact fitted in the guide groove to guide the contact to the guide groove. The dimension up to the hole of the bush is made larger than the dimension until the cord is located when the contact is mounted in the normal position. Wedge base light bulb socket to.