JP2906981B2 - 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 valve socket and, more particularly, to a valve socket for holding a base of a valve by holding the base with a metal fitting.

[0002]

2. Description of the Related Art Conventionally, as a valve socket of this kind,
The one shown in FIG. 6 is known. In the figure, a wedge base valve 1 has a flat base 2, and one lead wire 3 is provided on each side surface of the base 2. The valve socket 4 includes a rectangular tube portion 5 into which the base 2 can be inserted, and a pair of metal fittings 6 is arranged along the inner peripheral wall surface of the tube portion 5. The distal end 6a of the metal fitting 6 is curved so as to protrude along the inner peripheral side, and the convex portion 2a formed on the base 2 is formed.
Can be engaged.

In such a configuration, when the base 2 of the wedge base valve 1 is inserted into the cylindrical portion 5, the convex portion 2a abuts on the distal end 6a of the metal fitting 6 and bends to the outer peripheral side. Get over the convex part 2a. The base 2 is sandwiched by the metal fittings 6 from both side surfaces, and the tip 6a is engaged with the projection 2a to prevent the base 2 from coming off.

[0004]

The above-mentioned conventional bulb socket has a structure in which a part of a light bulb is sandwiched and held by bending a metal fitting. On the other hand, there are tolerances in the size of the bulb, and even if designed to standard dimensions, if the bulb is large, the bracket will bend beyond the allowable bending range and will permanently deform and return to its original shape. There is a problem that the light source may be lost, and when the light bulb is small, the holding power may be too weak to fall off.

[0005] In particular, even in the case where the entire bulb is made of glass, such as a wedge-based bulb, the tolerance is large, and this tendency becomes stronger. The present invention has been made in view of the above problems, and has as its object to provide a bulb socket that can be appropriately held even when a tolerance of a light bulb is large.

[0006]

In order to achieve the above object, according to the first aspect of the present invention , an abutment metal is provided on an inner peripheral wall surface of a cylindrical portion.
Fixture, and hold the base of the bulb inserted into the tube.
The valve socket that is electrically connected to the
Formed by notching the peripheral wall to elastically support the contact fitting
An arm piece is provided, and a cylindrical part is provided at the open end of the arm piece.
Form a cylindrical end that opens in the opening direction of the
U-shaped with the end on the opening side of the tool facing the outer peripheral side of the cylindrical part
At the end of the
Fold the end outward to the extent that it can be inserted into the cylindrical end.
It has the characteristic in the place where it was formed .

[0007]

[0008]

According to the first aspect of the present invention, the end of the contact fitting is folded back into a U-shape, and
The end of the cylindrical end formed on the arm piece from the opening side of
Inserted into the opening. And insert the bulb into the tube
And the arm piece elastically attaches the abutment that clamps the base of the bulb.
When the bulb base is large,
The arm piece and the contact fitting are both bent and supported. This
When inserting the bulb into the tube, push the abutment bracket outward.
The tip that is folded back to the outer peripheral side is engaged with the cylindrical end.
Combine. When pulling out the bulb, pull out the abutment
Force is applied, but the abutment fitting is attached to the cylindrical end at the tip.
Engagement is performed to prevent slippage.

[0009]

[0010]

As described above, according to the present invention, the contact fitting does not permanently deform even when the base of the bulb is large,
By setting the size so that a small one can be held, it is possible to provide a valve socket capable of holding a wide range from a small one to a large one. Ma
Further, the contact fitting can be prevented from coming off at the same time .

[0011]

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a valve socket according to one embodiment of the present invention. In the figure, a wedge base valve 10 has a flat base 11 integrally formed below, and convex portions 12 are formed on both surfaces of the base 11. The convex portion 12 includes a first convex portion 12a for engagement formed at a central portion in the width direction, a second convex portion 12b formed on both sides in the width direction, and a third convex portion 12c. Of the lead wire 13 protruding from the bottom surface of the first protrusion 1
It is folded upward so as to be located between 2a and the second convex portion 12b.

The valve socket 20 has a cylindrical portion 21 having a substantially rectangular cross section into which the base 11 of the wedge base valve 10 can be inserted.
In the central part of the wide peripheral wall of the peripheral wall, two slits 22, 22 are formed from the opening end toward the back side. Between the slits 22, 22 is formed an arm portion 23 having flexibility in the inward and outward directions of the peripheral wall, and the tip of the arm portion 23 is formed in a tubular shape so as to bulge outward from the peripheral wall. An end 23a is provided. Also,
A connector portion 24 into which a female connector can be inserted is formed on the back side of the bottom surface of the tubular portion 21, and a flange 25 is provided between the connector portion 24 and the tubular portion 21. An engagement projection 26 for engaging with a predetermined mounting hole is formed on the outer periphery in cooperation with the flange 25.

The contact fitting 30 is formed by bending a single heat-resistant copper alloy plate, and has a terminal 31 and a side support plate 3.
2, an electrode part 33, a movable contact piece 34, and a connecting part 35 connecting these. The double-folded and plate-shaped terminal portion 31 protrudes downward, and is a male terminal projecting through the bottom surface of the cylindrical portion 21 of the valve socket 20 and protruding into the connector portion 24 on the back side. The side support plate portion 32 is held in contact with the narrow peripheral wall of the cylindrical portion 21, and by contacting the surface, increases stability and is positioned at an accurate position. The central portion is raised by a press to form a bead and reinforced. Electrode part 3
Numeral 3 protrudes upward from the connecting portion 35 at a position facing the lead wire 13 of the wedge base valve 10, bends the band-shaped plate piece inward of the cylindrical portion 21, and protrudes inward toward the back side. An inclined surface is formed.

The movable contact piece 34 is formed substantially at the center of the cylindrical portion 21 so as to protrude upward from the connecting portion 35, and has a contact pressing portion 3 whose tip portion is bent in a mountain shape toward the inside of the cylindrical portion 21.
4a. In the vicinity of the distal end, a folded end portion 34b is formed by folding back in a U-shape toward the connecting portion 35 outside the cylindrical portion 21. Further, the end portion is slightly folded outward to form the locking piece 34c. It is formed. Here, the folded end 34b on which the locking piece 34c is formed is connected to the arm 2
3 is large enough to be inserted into the cylindrical end 23a from the upper opening. Next, the operation of the present embodiment having the above configuration will be described with reference to FIGS. First, the contact fitting 30 is mounted in the cylindrical portion 21 of the valve socket 20. The contact fitting 30 is inserted from the side of the terminal portion 31 to the back while sliding the side support plate 32 against the narrow inner peripheral wall surface of the cylindrical portion 21. Immediately before reaching the back, the end of the folded end 34 b of the movable contact piece 34 is formed in the cylindrical end 2 formed in the arm 23.
When it is inserted into the inside 3a and reaches the back, as shown in FIG. 2, the locking piece 34c comes to a position where it has passed through the cylindrical end 23a.

As shown in FIG. 2, when the wedge base valve 10 is not inserted, the folded end portion 34b of the movable contact piece 34 is held with its inner surface in contact with the outer surface of the arm portion 23. The piece 34c is in a state where nothing is locked. Base 11 of wedge base valve 10
Is inserted into the cylindrical portion 21, the movable contact piece 3
4 and 34, the two movable contact pieces 34 are pushed outward and bent. When the movable contact piece 34 bends outward, the outer surface of the folded end portion 34b is formed on the outer peripheral side of the cylindrical end portion 23a of the arm portion 23 with respect to the thickness of the base portion 11 of the wedge base valve 10. Only to the extent that it abuts against.

However, when the first convex portion 12a formed at the center of the base portion 11 comes into contact with the contact pressing portion 34a of the movable contact piece 34, the first convex portion 12a tries to further push outward. Then, as shown in FIG.
b pushes the cylindrical end 23a of the arm 23 outward, and the arm 34 is bent. When the first convex portion 12a gets over the contact pressing portion 34a, the movable contact piece 34 only sandwiches the base 11 between the distal ends of the contact pressing portion 34a. As shown in FIG. It almost returns to its original shape. In this state, as shown in FIG. 5, the electrode portion 33 comes into contact with the lead wire 13 folded back toward the base 11, and the lead wire 13 and the terminal portion 31 are conducted.

In such a valve socket 20, even if the wedge base valve 10 is relatively small, the wedge base valve 10 can be held as long as the thickness of the base 11 is such that the contact pressing portion 34a is slightly opened. On the other hand, wedge base valve 1
Even when 0 is large, the arm 23 bends outward and sandwiches the base 11 together with the contact fitting 34. Therefore, even if the tolerance of the wedge base valve 10 is large, it can be dealt with. When the wedge base valve 10 is pulled out, the first convex portion 12a contacts the contact pressing portion 34 and acts to pull out the contact fitting 30, but the folded end portion 34b
Since the locking piece 34c at the end of is caught by the lower opening edge of the cylindrical end 23a, it does not come off.

As described above, the movable contact piece 3 of the contact fitting 30
4 is elastically supported by the arm portion 23 of the peripheral wall of the cylindrical portion 21, so that the range of light bulbs that can be held without permanently deforming the contact fitting 30 can be expanded. In addition,
The above-described embodiment is merely an example of implementing the present invention, and the present invention includes all the following modifications. In the above-described embodiment, the slit 22 formed from the opening end is used.
The arm portion 23 is formed by a U-shaped notch on the side surface of the cylindrical portion 21 to form a flexible peripheral wall surface, and the movable contact piece 34 of the contact fitting 30 is formed on this surface. May be supported. Further, the arm piece is raised and formed on the inner periphery of the cylindrical portion 21 to form the movable contact piece 3 of the contact fitting 30.
4 may be supported. Further, the contact fitting 30
Although the electrode part 33 and the movable contact piece 34 are formed integrally with each other, they may be formed separately. Also,
The light bulb is not limited to the wedge base bulb 10, but may be another type of light bulb that is held by being held in a cylindrical portion by a contact metal fitting.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a valve socket according to one embodiment of the present invention.

FIG. 2 is a partial sectional view illustrating the operation of the valve socket.

FIG. 3 is a partial sectional view illustrating the operation of the valve socket.

FIG. 4 is a partial sectional view illustrating the operation of the valve socket.

FIG. 5 is a sectional view of a valve socket.

FIG. 6 is a partially cutaway perspective view of a conventional valve socket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Wedge base valve 11 ... Base 12 ... Convex part 20 ... Valve socket 21 ... Cylindrical part 22 ... Slit 23 ... Arm part 23a ... Cylindrical end part 30 ... Contact metal fitting 34 ... Movable contact piece 34a ... Contact pressing part 34b ... Folded end 34c: locking piece

Claims (1)

(57) [Claims] An abutment fitting is provided on an inner peripheral wall surface of a cylindrical portion.
Electrical connection while holding the base of the bulb inserted into the tube
In the following valve socket, The contact fitting is formed by cutting out a peripheral wall of the cylindrical portion.
Arm piece that elastically supports the At the open end of the arm piece,
Forming a cylindrical end that opens toward the
Fold the end of the opening side toward the outer periphery of the cylindrical
As well as the tip
Fold it outward to the extent that it can be inserted into the cylindrical end.
A valve socket characterized by being made.