JP2000299154A - Spring connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spring connector whose conductive material inside of a tube can be made thick uniformly, and surely electrically connected, excellent in durability, with a stable electric characteristic. SOLUTION: In this spring connector, a tube 10 is formed by deep drawing a clad material so that a side cladded with a conductive material 10a is inside, a coil spring 14 is inserted to be contracted therein, a fixed plunger 12 is inserted and fixed to an opening at one end of the tube 10, a movable plunger 16 is inserted and fixed to the other opening at the other end of the tube 10 and its opening edge is squeezed, the movable plunger 16 is constituted to be freely projected or receded so that one end part of the plunger 16 projects or gets in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring connector which has excellent durability and stable electrical characteristics.

[0002]

2. Description of the Related Art The structure of an example of a conventional spring connector is as follows. First, a tube is formed from a conductive material such as copper or brass by cutting or drawing. This tube has a shape in which one end is closed and the other end is widely opened. Then, nickel plating and gold plating, which are good conductive materials, are laminated on the inner and outer surfaces. In the tube having such a shape, a coil spring is inserted and contracted from an open end, and further, a movable plunger is inserted and the open end is narrowed.
The movable plunger is configured to project and retract so that one end protrudes outward and does not come out. The coil spring is formed by stacking nickel plating and gold plating on a good conductive material having elasticity.
Also, the movable plunger is similarly laminated with nickel plating and gold plating on a good conductive material, and the end face where the coil spring resiliently contacts is inclined with respect to the elastic biasing direction,
It is configured to be biased laterally within the tube. In such a configuration, the movable plunger is always deviated in the tube by the elastic force of the coil spring, and is elastically contacted with the inner surface of the tube, so that the movable plunger and the inner surface of the tube are reliably electrically connected.

[0003]

In the structure of the conventional spring connector as described above, the inner surface of the tube is a surface on which the movable plunger slides by elastic contact, and is easily worn. Therefore, the plating layer provided on the inner surface of the tube is
It is desirable that the thickness of the layer be uniform and thick. An example of the step of plating this tube is as follows. First, after completely removing chips and oils generated or adhered during processing from the tube, rinse thoroughly with water,
Next, nickel plating is performed on the inner and outer surfaces by electrolytic plating. Furthermore, after the nickel plating solution is thoroughly washed with water, gold plating is further laminated by electrolytic plating. After plating, the gold plating solution is thoroughly washed with water and dried.

In such a plating step, in order to form a uniform plating layer, the inner and outer surfaces of the tube must be reliably exposed to a plating solution, and the plating solution must be surely washed with water after plating. However, conventionally, since only one end of the tube is opened, air or the like easily stays inside the tube, and it is difficult for the plating solution and water for washing the plating solution to flow into the interior. Further, the plating solution flowing into the inside is hardly discharged. Therefore, it is easy to cause unevenness in the plating solution inside, to easily generate crystals of the plating solution that are not discharged, and to make it difficult to make the thickness of the plating layer uniform and to reduce the thickness. In order to improve these problems, the plating solution is stirred vigorously or ultrasonic vibration is applied to make it easier for the plating solution to flow into the tube. The discharge must be performed reliably, which is a time-consuming process. In particular, as the inner diameter of the tube is extremely small and deep, the air inside cannot be easily released, and the plating process is extremely complicated.

[0005] Therefore, in the conventional spring connector, the thickness of the plating layer made of a good conductive material provided on the inner surface of the tube tends to be non-uniform, and the electric plunger obtained by sliding the movable plunger on the inner surface of the tube. The connection tends to be unstable and its durability is not sufficient.

The present invention has been made in view of the above circumstances, and provides a spring connector which can make the thickness of a layer of a good conductive material inside a tube uniform, is excellent in durability, and has stable electric characteristics. The purpose is to do.

[0007]

In order to achieve the above object, a spring connector according to the present invention provides a coil spring in a tube formed by drawing a clad material with a surface on which a good conductive material is clad inside. Inserting and retracting, inserting and fixing a fixed plunger into one end opening of the tube, inserting a movable plunger into the other end opening of the tube and narrowing the open end thereof, and moving the movable plunger to one end. The portion is configured to protrude outward and to be retractable so as not to come out.

[0008] A coil spring is inserted and compressed into a tube formed by drawing a clad material with the surface on which the good conductive material is clad inward, and one end of the tube is placed so that the clad surface is on the outside. The coil plunger is closed or narrowed to prevent the coil spring from falling out, a movable plunger is inserted into the other end opening of the tube, and the opening end thereof is narrowed, so that the movable plunger is closed. You may comprise so that one end part may protrude outward, and may protrude and retract so that it may not come out.

A coil spring is inserted and contracted into a tube formed by drawing the clad material with the surface on which the good conductive material is clad inside, and a movable plunger is inserted into each end opening of the tube. The two open ends may be respectively constricted, and the movable plunger may be configured such that one end of the movable plunger protrudes outward and can be freely protruded and retracted so as not to come out.

A coil spring is inserted and compressed into a tube formed by drawing a clad material in which a good conductive material is clad on both surfaces of a conductive material, and one end of the tube is closed or narrowed so that the coil spring becomes outside. Insert the movable plunger into the opening at the other end of the tube and narrow the opening end of the tube, and project the movable plunger so that one end protrudes outward and does not fall out. And it may be configured to be retractable.

A coil spring is inserted and compressed into a tube formed by drawing a clad material having a good conductive material clad on both surfaces, and one end of the tube is closed or narrowed so that the coil spring comes out. So that the movable plunger is inserted into the other end opening of the tube, and the open end is bent and narrowed so that the good conductive materials clad on the both surfaces come into contact with each other, thereby narrowing the movable plunger. It may be configured so that one end protrudes outward and can be freely protruded and retracted so as not to come out.

A coil spring is inserted and compressed into a tube formed by drawing a clad material having both surfaces clad with a good conductive material, and one end of the tube comes into contact with the good conductive material clad on both surfaces. So that the coil spring is not closed or narrowed so that the coil spring does not fall out, a movable plunger is inserted into the other end opening of the tube and the opening end thereof is narrowed, and the movable plunger is closed. It may be configured so that one end protrudes outward and can be freely protruded and retracted so as not to come out.

[0013]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a longitudinal sectional view of a first embodiment of the spring connector of the present invention.

In FIG. 1, a deep drawing is performed with a clad material in which a good conductive material 10 a such as gold is clad on one side of a flat conductive material such as nickel-white or the like and the clad surface of the good conductive material 10 a is inside. The tube 10 is formed by processing. The tube 10 has wide open ends. Then, the fixed plunger 1 is inserted into one end opening of the tube 10.
2 is inserted and fixed by swaging. The outer surface of the fixed plunger 12 is appropriately plated with a good conductive material such as gold, and has a tip shape suitable for the semi-spherical shape of the electrode 20 to be brought into contact. Tube 1
The coil spring 14 is inserted and contracted in 0. Further, the movable plunger 16 is inserted into the opening at the other end of the tube 10.
Is inserted, the opening end thereof is narrowed by caulking, and the movable plunger 16 is configured to protrude and retract so that one end protrudes outward and does not come out. The outer surface of the movable plunger 16 is also appropriately plated with a good conductive material such as gold, and has a tip shape suitable for the flat shape or the like of the electrode 22 to be brought into contact.

In the first embodiment having such a configuration, the fixed plunger 12 and the good conductive material 10a clad inside the tube 10 are securely electrically connected by caulking. Further, the movable plunger 16 slides on the good conductive material 10a inside the tube 10 to make electrical connection. Here, since the good conductive material 10a inside the tube 10 is provided by cladding, the thickness thereof is uniform, and the thickness can be appropriately increased as compared with plating or the like. Therefore, the electrical connection between the good conductive material 10a of the tube 10 and the movable plunger 16 is secure, stable, and excellent in durability. Therefore, it is possible to obtain a spring connector having stable electrical characteristics and excellent durability.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a longitudinal sectional view of a second embodiment of the spring connector of the present invention. 2, the same or equivalent members as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In the second embodiment shown in FIG. 2, the fixed plunger 12 is not provided as in the first embodiment, and the inside good conductive material 10a is located outside at one end of the tube 10. It is bent. In addition, the one end is narrowed so that the coil spring 14 does not come out outward. The shape in which the inside good conductive material 10a is bent so as to be outside may be any shape as long as the outside good conductive material 10a can directly contact the electrode 20 to be contacted. In the embodiment shown in FIG.
It has a shape suitable for abutting against the surface.

In the second embodiment having such a configuration, since the good conductive material 10a of the tube 10 directly contacts one of the electrodes 20, a more reliable electrical connection can be obtained. Also,
The number of parts is small, which is suitable for mass production, and it is easy to reduce the size.

FIG. 3 is a longitudinal sectional view of a main part of another modification of the spring connector of the second embodiment. In the modification shown in FIG. 3, at one end of the tube 10, the inside good conductive material 10 a is folded so as to be outside, in order to abut the flat electrode 22. In the embodiment shown in FIGS. 2 and 3, one end of the tube 10 is narrowed to prevent the coil spring 14 from coming off, but may be closed.

Further, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a vertical sectional view of a third embodiment of the spring connector of the present invention. 4, members that are the same as or equivalent to those in FIG. 1 are given the same reference numerals, and redundant description is omitted.

In the third embodiment shown in FIG.
A movable plunger 16 is provided at one end of the cylinder 0 in place of the fixed plunger 12 of the first embodiment. That is, the movable plungers 16 are provided at both ends of the tube 10, respectively.

In the third embodiment having such a structure, both ends are movable, and the movable plungers 16 at both ends are electrically connected to the good conductive material 10a inside the tube 10 reliably. Moreover, it is excellent in durability.

A fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a vertical sectional view of a fourth embodiment of the spring connector according to the present invention. 5, the same or equivalent members as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In the fourth embodiment shown in FIG. 5, good conductive materials 30a and 30 such as gold
The tube 30 is formed by deep drawing with a clad material b is clad. One end of the tube 30 is closed, and the other end is widely opened. In addition, as for the shape of the closed one end portion, a concave portion or a convex portion is appropriately formed in the center portion of the distal end surface according to the shape of the electrode or the like to be brought into contact. Then, the coil spring 14 is inserted and contracted into the tube 30 from the opening at the other end, the movable plunger 16 is further inserted, the opening end of the tube 30 is narrowed by caulking, and the movable plunger 16 is moved to one end. Is configured to protrude and retract so as to protrude outward and not to come out.

In the fourth embodiment having such a structure, the good conductive material 30b outside the tube 30 contacts one of the electrodes,
The movable plunger 16 is in contact with the other electrode. The movable plunger 16 is electrically connected to the good conductive material 30a inside the tube 30 by sliding contact. Here, the good conductive materials 30b and 30a outside and inside the tube 30 are:
Electrical connection is made via nickel-white or the like, which is a conductive material of the base material of the clad material. Moreover, the good conductive materials 30b and 30a on the outside and inside of the tube 30 face each other over a wide area via the base material which is a conductive material, and the resistance between the good conductive materials 30a and 30b is extremely small. is there. Therefore, a reliable electrical connection is obtained between the good conductive material 30b outside the one end and the movable plunger 16.

FIG. 6 is an enlarged longitudinal sectional view of a main part of another modification of the tube of the fourth embodiment. In the modification shown in FIG. 6, the open end of the side of the tube 30 on which the movable plunger 16 is provided is bent so as to be wound inward, so that the inner and outer good conductive materials 30a and 30b contact each other. It is something that touches.

FIG. 7 is an enlarged longitudinal sectional view of a main part of still another modification of the tube of the fourth embodiment. FIG.
In another modification shown in FIG. 7, the tube 30 is bent so that the open end thereof on the side where the movable plunger 16 is provided is wound outward, so that the inner and outer good conductive materials 30a and 30b are bent. They are designed to abut each other. Note that, in the modification shown in FIGS.
As a matter of course, the movable plunger 16 is configured so as to protrude and retract so that the movable plunger 16 protrudes one end outward so that it does not come out.

In the modified example of the above configuration, the good conductive materials 30a and 30b on the inside and outside of the glad material are directly in contact with each other to make an electrical connection, so that the electrical resistance therebetween is further reduced. Thus, a spring connector having stable electrical characteristics and high durability can be obtained.

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a longitudinal sectional view of a fifth embodiment of the spring connector of the present invention. 8, members that are the same as or equivalent to those in FIG. 5 are given the same reference numerals, and redundant description will be omitted.

The fifth embodiment shown in FIG. 8 is different from the fourth embodiment shown in FIG. 5 in that one end of the tube 30 closed in the fourth embodiment is opened, and the open end is wound inward. The coil spring 14 is bent so that the open end thereof is narrowed so that the coil spring 14 does not fall out.

In the fifth embodiment having such a structure, the good conductive materials 30a and 30b on the inner side and the outer side of the tube 30 are in direct contact with each other, so that the electrical connection is ensured. Moreover, it is easier to bend one end of the tube 30 as compared with the modified example of the fourth embodiment shown in FIGS. 6 and 7. Then, the coil spring 1 is placed in the tube 30 having one end bent.
The spring connector of the present invention can be assembled by inserting the movable plunger 4 and the movable plunger 16 to narrow the open end of the other end. In the fifth embodiment, one end of the tube 30 on the side where the inner and outer good conductive materials 30a and 30b are bent so as to contact each other may be closed.

In the first embodiment, the tube 10
Either the step of fixing the fixed plunger 12 to one end and the step of narrowing the other end so that the movable plunger 16 does not come out may be performed first. Also in the second embodiment, any one of the step of bending or folding one end of the tube 10 and the step of constricting the other end of the tube 10 so that the movable plunger 16 does not come out may be performed first. . Furthermore, the gratt material forming the tubes 10 and 30 only needs to be clad with a good conductive material, and the material is not limited to gold. Further, in the first, second and third embodiments, it is desirable that the base material of the grat material is suitable for deep drawing, but any material may be used as long as a desired shape of the tube 10 can be obtained. Since the base material itself does not serve as an electrical path, it does not need to be a conductive material. Similarly, in the modified example of the fourth embodiment and the fifth embodiment, it is desirable that the base material of the grat material is suitable for deep drawing, but any material can be used as long as the desired shape of the tube 30 can be obtained. Since the substrate itself does not serve as an electrical path, it does not have to be a conductive material. However, in the fourth embodiment shown in FIG. 5, the base material of the clad material must be a conductive material because the base material of the clad material serves as an electrical path. Further, in the first to third embodiments, the clad material is
At least a good conductive material 10 is provided on the inner side of the tube 10.
As long as a is clad, the tube 10 may be formed of a clad material in which a good conductive material is clad on both surfaces.

[0033]

As described above, since the spring connector of the present invention is constituted, the following special effects can be obtained.

In the spring connector according to the first aspect, the good conductive material inside the tube is clad, so that the thickness thereof is uniform and an appropriate thickness can be obtained. Electrical connection is reliably obtained, and excellent durability and stable electrical characteristics are obtained.

According to the spring connector of the second aspect, the same effect as that of the first aspect is obtained, and the number of parts is small, and the structure is simpler.

According to the spring connector of the third aspect, a spring connector of both ends movable type which can obtain the same effect as the first aspect is obtained.

In the spring connector according to the fourth aspect, the good conductive material on the outside of the tube is in contact with one of the electrodes, the movable plunger is in sliding contact with the good conductive material on the inside, and the good conductive material on the outside and inside is good. Since the material is electrically connected with a very small resistance through the conductive material of the base material of the glazing material over a large area,
The same effect as the first aspect is obtained.

In any of the spring connectors according to the fifth and sixth aspects, the good conductive materials inside and outside the tube are in contact with each other and are electrically connected to each other, and are connected with a smaller resistance, so that a more stable electric connection is achieved. Characteristic is obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment of a spring connector according to the present invention.

FIG. 2 is a longitudinal sectional view of a second embodiment of the spring connector of the present invention.

FIG. 3 is a longitudinal sectional view of a main part of another modification of the spring connector of the second embodiment.

FIG. 4 is a longitudinal sectional view of a third embodiment of the spring connector of the present invention.

FIG. 5 is a longitudinal sectional view of a fourth embodiment of the spring connector of the present invention.

FIG. 6 is an enlarged longitudinal sectional view of a main part of another modification of the tube of the fourth embodiment.

FIG. 7 is an enlarged longitudinal sectional view of a main part of still another modified example of the tube of the fourth embodiment.

FIG. 8 is a vertical sectional view of a fifth embodiment of the spring connector according to the present invention.

[Explanation of symbols]

 10, 30 Tube 10a, 30a, 30b Good conductive material 12 Fixed plunger 14 Coil spring 16 Movable plunger 20, 22 Electrode

Claims (6)

[Claims] 1. A coil spring is inserted and contracted into a tube formed by drawing a clad material with a surface on which a good conductive material is clad inside, and a fixed plunger is inserted and fixed into one end opening of the tube. The movable plunger is inserted into the other end opening of the tube, the opening end is narrowed, and the movable plunger is configured to protrude and retract so that the one end protrudes outward and does not come off. A spring connector characterized by the above-mentioned. 2. A coil spring is inserted and compressed into a tube formed by drawing a clad material with the surface on which a good conductive material is clad inside, and one end of the tube is made to have the clad surface facing the outside. The coil spring is bent or folded and closed or narrowed so that the coil spring does not come out, and a movable plunger is inserted into the other end opening of the tube and the opening end thereof is narrowed to form the movable plan. A spring connector characterized in that the jar is configured so that one end of the jar protrudes outward and can be freely protruded and retracted so as not to come out. 3. A coil spring is inserted and contracted into a tube formed by drawing a clad material with the surface on which a good conductive material is clad inside, and a movable plunger is inserted into each end opening of the tube. A spring connector, wherein both open ends of the movable plunger are constricted, and the movable plunger is configured to project and retract so that one end of the movable plunger projects outward and does not come off. 4. A coil spring is inserted and compressed into a tube formed by drawing a clad material in which a good conductive material is clad on both surfaces of a conductive material, and one end of the tube is closed or narrowed to form the coil spring. The movable plunger is inserted into the other end opening of the tube and the opening end is narrowed so that the movable plunger protrudes outward and does not come out. A spring connector characterized in that the spring connector is configured to be freely protruded and retracted. 5. A coil spring is inserted and contracted into a tube formed by drawing a clad material having both surfaces clad with a good conductive material, and one end of the tube is closed or narrowed so that the coil spring moves outward. The movable plunger is inserted into the opening at the other end of the tube, and the open end is bent and narrowed so that good conductive materials clad on the both surfaces come into contact with each other. A spring connector, wherein one end of the spring connector protrudes outward and is configured to be freely protruded and retracted so as not to come out. 6. A tube formed by drawing a clad material having both surfaces clad with a good conductive material, a coil spring is inserted and compressed, and one end of the tube is connected to the good conductive material clad on both surfaces. The movable plunger is bent so as to abut and close or narrow to prevent the coil spring from falling out, insert a movable plunger into the other end opening of the tube and narrow the opening end thereof, A spring connector, wherein one end of the spring connector protrudes outward and is configured to be freely protruded and retracted so as not to come out.