JP2567845Y2 - Terminal for valve 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 terminal for a bulb socket used in an automobile lamp and the like, and more particularly, to a bulb socket terminal mounted in the socket and electrically connected to a cathode side of a bulb base. In the terminal, the contact reliability of the connector that makes elastic contact with the valve base is improved, and the deformation of the connector at the time of valve insertion or the like is prevented, and workability is improved.

[0002]

2. Description of the Related Art Conventionally, in this type of bulb socket, as shown in FIGS. 10 and 11, the terminal 1 for the cathode on the socket side is formed by bending a single thin band-shaped metal plate. The connector 1a on the valve connection side is elastically cut and raised from the vicinity of one end, and the connector 1b on the connector connection side is provided at the other end. As shown in FIG. 12, the terminal 1 is inserted into an insertion groove 2c having a substantially T-shaped cross section formed in a peripheral wall 2b of a valve insertion opening 2a of the socket 2, and a connector 1a protruding inward from the insertion groove 2c. Is in contact with the cathode surface of the base 3a of the bulb 3 inserted into the bulb insertion opening 2a.

The connector 1b on the connector side of the terminal 1 projects from an insertion hole formed in the bottom wall 2f of the valve insertion port 2a to the connector insertion port 2g, and is connected to a connector (not shown).

Similarly, the anode-side terminal 4 formed by bending a single metal plate is connected to the anode-side terminal insertion groove formed diagonally with the cathode-terminal insertion groove 2b of the socket 2. 2d, the valve connection side contact 4a is connected to the anode of the valve bottom surface 3d, and the other connector 4b projects from the bottom wall 2f and is connected to the connector. The socket 2 and the valve 3 are attached by inserting a pair of pins 3b projecting from the outer peripheral surface of the valve base into a J-shaped pin insertion groove 2h formed in the peripheral wall 2b of the valve insertion opening from above, and after inserting the valve. It is rotated and assembled to the socket 2.

As described above, the connector 1a on the bulb connection side of the conventional cathode terminal 1 is cut and raised from the vicinity of the tip at the center of the strip-shaped flat plate portion 1c of the metal piece, and at a required angle a from the cut and raised base 1d. The contact portion 1e at the protruding end is elastically brought into contact with the base 3a.

[0006]

When the cathode terminal 1 having the above shape is inserted into the socket 2 and connected to the bulb 3,
The cut-and-raised base 1d of the connector 1a is located at a position close to and opposed to the valve base 3a with the open end of the valve insertion opening 2a. Therefore, when the bulb 3 is continuously turned on, the temperature of the base 1d becomes high due to the heat generated by the bulb 3. In particular, when a high power bulb or a double bulb bulb is used as the bulb 3, the base 1d is heated. Temperature of 1
May reach up to 80 ° C.

The base 1d of the connecting portion 1a of the cathode terminal 1
When the temperature rises, the spring property deteriorates, the contact pressure of the contact portion 1c decreases, and the contact resistance to the outer periphery of the base 3a increases.
As a result, there is a problem in that the temperature is further increased, and eventually, a non-conduction is caused.

Further, due to the deterioration of the spring property of the base 1d, the connector 1a having a sufficient spring force in the initial stage shown by the two-dot chain line in FIG. To
When the valve 3 is replaced, it may not return to the initial position. In this case, when the base 3a of the valve 3 having a small base is inserted, a gap t is formed between the base 3a and the outer periphery of the base 3a as shown in FIG. There is a problem that the outer periphery is not brought into contact with the outer periphery without contact.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems in the conventional cathode terminal used in a bulb socket, to improve the contact reliability of the cathode terminal, and to improve the bulb insertion workability. It was done.

In order to achieve the above object, the present invention inserts and inserts a terminal insertion groove formed in a peripheral wall of a bulb insertion opening of a socket from above into the terminal insertion groove, and projects from the terminal insertion groove to a cathode side of an outer periphery of the bulb mouthpiece. In the cathode terminal, which is formed by bending a single metal piece, the bulb-side connector and the connector connected to the cathode-side connector are formed by cutting and raising the metal piece. Then, while the base of the cut-and-raised position is located on the bottom wall side of the valve insertion opening, the connector is projected from the base side toward the inner peripheral surface of the valve insertion opening and the cut-and-raised tip is located on the valve insertion opening opening side. A terminal for a valve socket, wherein the terminal is bent so as to protrude outward from a peripheral surface, and a stopper portion is provided for preventing the cut-and-raised tip from moving into the inside of the valve insertion port. It is intended to provide.

The portion forming the valve-side connector is folded from both sides with the central portion of the narrow strip-shaped flat plate portion of the metal piece interposed therebetween to form two sheets, and the valve-side connector is formed at one side turned back. On the other hand, the stopper portion located on the inner surface side of the distal end of the connector is provided so as to protrude on the other side portion to be folded back.

Alternatively, a protruding piece is extended at the tip of the strip-shaped flat plate portion forming the cut-and-raised connector, and the protruding piece is folded back so that the tip is located on the inner side of the tip of the connector. A stopper may be provided.

[0013]

When the cathode terminal has the above shape, the cut-and-raised base of the bulb-side connector is located on the bottom side of the bulb insertion port,
It will be located at a position not opposed to the valve base inserted into the valve insertion opening. Therefore, it is possible to reduce the heating of the cut-and-raised base due to the heat generated by the valve, to reduce the temperature to a high temperature, to maintain the spring property of the connector, and to secure the contact reliability.

Further, the cut-and-raised tip of the connector located on the valve insertion port opening side is located outside the inner peripheral surface of the valve insertion port, and the distal end moves inside the valve insertion port inner peripheral face. By providing a stopper portion for preventing the connection, the valve can be prevented from hitting the distal end of the connector when the valve is inserted, and the connector can be prevented from being deformed when the valve is inserted.

That is, if the valve is pryingly inserted into the valve insertion opening of the socket or if it is inserted vigorously, if the tip of the cut and raised connector protrudes into the valve insertion opening, the base of the valve is closed. There is a possibility that the tip may be inverted toward the valve insertion port bottom wall side with the base as a fulcrum. In addition, while transporting or managing the cathode terminal by itself, there is a possibility that the tip of the connector is caught by an object and turned over. When the tip of the connector is inverted in this way, the connector does not come into contact with the outer periphery of the base of the valve, resulting in poor contact. Further, since it is necessary to insert the valve without twisting it, careful attention is required for the insertion work, and the workability is deteriorated.

In order to solve this problem, as described above, since the tip of the connector is prevented from being inverted, contact failure due to the inversion is eliminated, and the contact reliability of the cathode terminal is improved. Further, even when the valve is pryingly inserted, the connector is not deformed, so that the insertion workability is improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments shown in the drawings. Since the configuration of the socket and the valve is the same as that of the conventional example described above, the same reference numerals are given and the description is omitted. 1 to 5 show a terminal 10 for a cathode according to the first embodiment.
Is shown.

The terminal 10 is formed by bending a single metal piece in the same manner as the terminal 1 of the conventional example. The terminal 10 is provided at the center of the narrow band-shaped flat plate portion 10b on one half side when the socket is mounted. This is similar in that the connector 10a on the valve connection side is formed by cutting and raising so as to be parallel to the insertion groove 2c, and the connector 10g on the connector connection side is formed on the other side.

More specifically, the flat plate portion 10b is formed into an outer shape as shown by a two-dot chain line in FIG.
j and 10k are folded back to form a two-layer structure. The connector 10a is formed by cutting and raising the outer end of the one folded side portion 10j, and the side portion 10j is folded back on the upper surface of the central portion 10m to position the connector 10a at the center position of the central portion 10m. The inner end 10n of the side portion 10j is overlapped along one outer end of the central portion 10m.

The other bent side portion 10k is formed with a stopper portion 10p protruding near the tip thereof.
The side portion 10k is overlapped and folded along the other outer end portion of the central portion 10m, and the stopper portion 10p is positioned on the upper surface of the tip 10e of the folded connector 10a of the other side portion 10j.

A small relief hole 10i is formed at the center of the central portion 10m where the connector 10a overlaps, at a position facing the tip 10e of the connector 10a.
Remaining portions other than 0i are reinforced by setting the other portion of the connector 10 ', that is, the base portion 10d under the contact portion 10c.

As described above, the flat plate portion 1 formed by stacking two sheets at the central portion 10m and the folded side portions 10j and 10k.
0b, a connector 10a is located at the center thereof, a base 10d of the connector 10a is located on a continuous side with the other connector 10g, and a tip 10e of the cut-and-raised is a flat plate 10b.
It is located on the tip side. That is, when the terminal 10 is mounted on the socket 2, the base 10d is located on the bottom wall 2f side of the valve insertion port 2a, and the tip 10e is located on the opening side.

The connector 10a is formed by cutting and raising the base 10
d, projecting inward at a predetermined angle b, and projecting into the valve insertion port 2a when the socket is attached.
The light is refracted outward in the opposite direction from the substantially central portion in the length direction to the distal end portion 10e to form a "<" shape as a whole, and the inwardly projecting bending point is the contact portion 10c.

The distal end portion 10e is projected through an escape hole 10i formed in the central portion 10m, and is projected outward from the inner peripheral surface of the peripheral wall 2b of the valve insertion opening 2a when the socket is mounted on the socket 2. In addition, the stopper 10p is positioned inside the tip 10e, and the stopper 10
p causes the distal end 10e of the connector 10a to be inserted into the valve insertion port 2.
It is not allowed to move inside a.

As described above, the connector 10a of the cathode terminal
Is provided outside the inner peripheral surface of the valve insertion opening 2a of the socket 2, and a stopper 10j for preventing the distal end 10e from moving inside the inner peripheral surface of the valve insertion opening 2a is provided. Since the valve 3 is provided, when the valve 3 is inserted into the valve insertion opening 2a, it does not come into contact with the cut-and-raised tip portion 10e of the connector 10; The base 10d as a fulcrum.
e can be prevented from being inverted toward the bottom wall 2f. Thereby, contact failure due to inversion and deformation is eliminated, and contact reliability of the cathode terminal 10 is improved. Further, even if the valve 3 is pryingly inserted into the valve insertion opening 2a, the connector 10a does not deform or invert. In addition, there is no possibility that the product is hooked on an object during transportation management and turned over.

Further, the base 10d of the connector 10a is separated from the position facing the base 3a of the valve 3 which generates heat, so that the temperature of the base 10d is hardly increased, and the spring property is hardly deteriorated. Experiments have revealed that the temperature is lower by about 30 ° C. than the base of the conventional cathode terminal. As described above, since the spring property of the connector 10a is hardly deteriorated, the contact pressure of the contact portion 10c does not decrease, and the contact reliability of the cathode terminal 10 is improved.

Further, the flat plate portion 10b of the cathode terminal 10 is formed by folding the two side portions 10j and 10k at the central portion 10m so that the flat plate portion 10b is reinforced and the strength is improved. Further, it is not necessary to provide a cut-and-raised hole in the central portion 10m as in the related art, and the area of the escape hole 10i is much smaller than that of the cut-and-raised hole. Therefore, the heat radiating area of the flat plate portion 10b including the side portions 10j and 10k and the central portion 10m having no cut-and-raised hole is larger than that of the related art, and the heat radiating property is improved.

FIGS. 6 to 9 show a second embodiment of the present invention. In the second embodiment, instead of providing the stopper portion 10p 'on the side portion 10k of the substrate portion 10b, a central portion 10p' is provided.
The protruding piece 10q 'extends from the tip of the m'
By turning back q ', the tip of the protruding portion is located on the inner surface side of the tip 10e' of the connector 10a, and is used as a stopper 10p '. The other configuration and operation are the same, and thus the description is omitted.

[0029]

As is apparent from the above description, the cathode terminal used in the bulb socket of the present invention has the base of the connector formed by cutting and raising the socket opposite to the insertion opening side of the bulb insertion opening when the socket is mounted. Provided on the bottom wall side of the connector, since the base of the connector is arranged at a separated position not facing the valve base to be inserted into the valve insertion port, the base is hardly heated to a high temperature by the valve that generates heat, Since the spring property is hardly deteriorated, the contact reliability is improved.

Further, as described above, the cut-and-raised tip of the connector is located at the valve insertion port opening side, but the tip of the connector is positioned outside the inner peripheral surface of the valve insertion port of the socket. In addition to the provision, the cathode terminal is provided integrally with a stopper that prevents the above-mentioned tip from moving inside the inner peripheral surface of the bulb insertion port, so that when the bulb is inserted, the connector tip comes into contact with the bulb, Deformation or inversion caused by being pushed by the valve can be prevented beforehand. Therefore, the contact failure due to the inversion is eliminated, and the contact reliability of the cathode terminal is improved. Further, since the valve can be inserted even if the valve is pryed, the insertion workability is improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a bulb socket having a cathode terminal according to a first embodiment of the present invention.

FIG. 2 is a side view of the cathode terminal of the first embodiment.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a front view of FIG. 2;

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a side view of a cathode terminal according to a second embodiment.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a front view of FIG. 6;

FIG. 9 is a sectional view taken along line AA of FIG. 7;

FIG. 10 is a side view of a conventional cathode terminal.

FIG. 11 is a plan view of FIG.

FIG. 12 is a cross-sectional view of a state where a conventional cathode terminal is mounted on a socket.

FIGS. 13A, 13B, and 13C are explanatory diagrams of a deteriorated state of a connector.

[Explanation of symbols]

 2 Valve socket 2a Base insertion hole 3 Valve 3a Base 10, 10 'Cathode terminal 10a Connector 10b Flat plate 10c Contact 10d Base 10e Tip 10j, 10k Both sides 10p Stopper

Claims (3)

(57) [Scope of request for utility model registration] 1. A bulb-side connector, which is inserted from above into a terminal insertion groove formed in a peripheral wall of a bulb insertion opening of a socket, and protrudes from the terminal insertion groove to elastically contact a cathode side of an outer periphery of a bulb base; The connector to be connected to the connector
A cathode terminal formed by bending one metal piece, wherein the bulb-side connector is formed by cutting and raising the metal piece, and the base of the cut and raised is located on the bottom wall side of the valve insertion opening. On the other hand, a cut-and-raised tip located on the valve insertion port opening side is projected outward from the inner peripheral surface of the valve insertion port, and a stopper portion for preventing movement into the valve insertion port is provided. Terminal. 2. A part forming the valve-side connector,
The metal piece is folded from both sides with a central portion of the strip-shaped flat plate portion sandwiched therebetween to form two sheets, and the valve side connector is formed on one side to be folded, while the other side is folded on the inner surface of the tip of the connector. 2. The valve socket terminal according to claim 1, wherein the stopper portion is provided so as to protrude. 3. The method according to claim 1, wherein a protruding piece is extended at a tip of the strip-shaped flat plate portion forming the cut-and-raised connector, and the protruding piece is folded back so that the tip is located on an inner surface side of the connector tip. 2. The valve socket terminal according to claim 1, further comprising a stopper portion.