JP2001210420A - Electric connecting device and connecting unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electric connecting device which has the configuration that different junction loads can be precisely established while preventing a large-sizing of structure when the different loads are added between junctions to oppose with eath other. SOLUTION: In an electric connection device which arranges a pair of pin terminals which can be respectively abutted on opposing contacts and an elastic body that presses the pin terminals against the contacts in a conductive tube, it has a configuration that an internally mounted elastic body 14 which is arranged at the opposing position between pin terminals 12, 13 and an externally mounted elastic body 15 which is arranged at the outer circumference of the internally mounted elastic body 14 are provided, and that a pressing forces against the respective pin terminals 12, 13 by respective elastic bodies 14, 15 for respective pin terminal 12, 13 are made different.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connection device, and more particularly, to a connector used for forming an electric circuit by elastically contacting opposing contacts.

[0002]

2. Description of the Related Art A connector is a member used for electrical connection between opposed printed boards or between a printed board and components. To configure the connector,
In addition to those having a structure in which a plug and a jack can be inserted and removed in combination, there is a pin-type connector which always makes contact with opposing contacts and electrically connects the contacts instead of the lead wires. The pin-type connector has a configuration in which a pin terminal slidable at both ends in the axial direction is disposed in a holder, and a habit of constantly pressing the pin terminal to the contact point by a coil spring disposed between the pin terminals is provided. (For example, JP-A-4-270967).

FIG. 3 is a view showing an example of a pin-type connector which is constantly pressed against a contact. In FIG. 3, a pin-type connector 1 is provided inside a conductive tube 2 loaded in a holder (not shown). It has slidable pin terminals 3 arranged at both ends in the axial direction. The pin terminals 3 are pressed in a direction away from each other by an elastic body 4 such as a coil spring disposed between opposing ends, and are provided on, for example, a printed circuit board or the like located in a direction in which the pressing force acts. It can be pressed against the contacts.

[0004] On the other hand, some of the contacts to which the pin terminals 3 are pressed against each other have different structures depending on the contact pressure. For example, when a pin-type connector is installed between a microphone or a speaker (hereinafter referred to as a microphone for convenience) used for a mobile phone and a circuit board for an amplifier, a microphone side and a circuit board side are connected. In some cases, the contact load on each side may differ due to the difference in the support stiffness. In this case, FIG.
When a single elastic body 4 as shown in (1) is used, different contact loads cannot be obtained. Therefore, conventionally, as shown in FIG. 4, elastic bodies (indicated by reference numerals 4A and 4B for convenience) that can apply different pressing forces to a pair of pin terminals are arranged in series.

[0005]

However, the configuration of the above-described conventional pin-type connector has the following problems.
When an elastic body that applies a contact load to each pin terminal 3 is provided in series, the contact load for each contact can be set more accurately than when a single elastic body 4 is used, but the elasticity of the contact body can be set. Body 4
The arrangement space for A, 4B, particularly the space in the longitudinal direction of the elastic bodies 4A, 4B, becomes large. For this reason, the distance between the pin terminals is likely to be large, and depending on the distance, it becomes bulky. When a pin-type connector is used for electrical components such as the above-described mobile phone, the space occupied by the pin-type connector disposed between the contacts needs to be large, so that the electrical component containing the connector has a large structure. It is not preferable.

SUMMARY OF THE INVENTION In view of the above-described problems in the conventional electrical connection device, it is an object of the present invention to accurately set different contact loads while preventing an increase in the size of the structure when different loads are applied to opposing contacts. An object of the present invention is to provide an electrical connection device having a configuration capable of performing the following.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a pair of pin terminals each capable of abutting an opposing contact, and pressing the pin terminal against the contact. An electrical connection device in which an elastic body is disposed in a conductive tube, comprising: an interior elastic body arranged at a position facing the pin terminals, and an exterior elastic body arranged around the outer periphery of the interior elastic body. The present invention is characterized in that a configuration is provided in which the pressing force of each elastic body against each pin terminal is made different.

According to the first aspect of the present invention, the outer elastic body is arranged on the outer periphery of the inner elastic body arranged at the position facing the pin terminal, and the pressing force by these elastic bodies is made different.
Some of the elastic members provided to apply different installation loads to the respective pin terminals overlap each other, so that the space occupied by the elastic members in the longitudinal direction can be reduced.

According to a second aspect of the present invention, the interior elastic body is positioned at each end in the extending direction within the opposing surface of the pin terminal, and the exterior elastic body is connected to the tube side and the one pin terminal. , Each end in the extension direction is positioned between them.

According to a third aspect of the present invention, when the one pin terminal moves in a direction in which a distance between the pin terminal and the opposing pin terminal is reduced, a pressing force corresponding to a repulsive force generated between the interior elastic body and the exterior elastic body. And the other of the pin terminals is
When it moves in the direction that the distance between the opposing pin terminals becomes smaller,
It is characterized in that a covering pressure commensurate with the repulsion generated in the interior elastic body is applied.

According to the second and third aspects of the present invention, the repulsive force from the plurality of elastic members which are arranged so as to partially overlap each other in the longitudinal direction is applied to one of the pin terminals and one of the plurality of elastic members. Since only the repulsive force from the pin terminals can act on the other pin terminals, different contact loads can be set at appropriate values for each pin terminal in a state where the space occupied by the pin terminals is reduced.

According to a fourth aspect of the present invention, there is provided a connection unit for electrically connecting contacts provided at spaced positions, comprising a pair of pin terminals capable of abutting and contacting the contacts. An elastic body for pressing the pin terminals toward the contacts, a conductive tube in which the pin terminals and the elastic body are respectively disposed, and a support member for supporting the tubes between the contacts. The elastic body includes an interior elastic body arranged at a portion facing the pin terminal, and an exterior elastic body arranged between one of the pin terminals and the tube around the interior elastic body. , And are provided in such a manner that a part thereof in the longitudinal direction is overlapped with each other.

According to the fourth aspect of the present invention, since the interior elastic body and the exterior elastic body, which are the elastic bodies, are provided in the tube so as to partially overlap each other in the longitudinal direction. The occupied space when the elastic body is provided can be reduced.

According to a fifth aspect of the present invention, the one pin terminal is set with a contact load obtained by synthesizing a pressing force from the inner elastic body and a pressing force from the outer elastic body. The terminal is characterized in that a contact load is set by a pressing force from the interior elastic body.

According to the fifth aspect of the present invention, it is possible to set a contact load due to the pressing force of only the interior elastic body and a case where the combined pressing force by using the exterior elastic body in addition to the interior elastic body is used as the contact load. In addition, a contact load corresponding to the support rigidity at the contact can be secured.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a pin connector 10 which is an electrical connection device according to an embodiment of the present invention. 1, a pin-type connector 10 is, as shown in FIG. 2, a conductive tube 1 loaded in a holder 23 provided in a microphone 20 which is one of the electrical components.
1 and a pair of pin terminals 12 and 13 mounted on both ends of the tube 11 in the longitudinal direction.

Inside the tube 11, a step portion 11A having a different inner diameter is provided in the middle of the tube 11 in the longitudinal direction.
One of the pin terminals 12 is provided on the large diameter portion with the step 11A as a boundary.
The other pin terminal 13 is disposed on the small diameter portion so as to be slidable along the longitudinal direction of the tube 11. The outer peripheral surface of each of the pin terminals 12 and 13 is in contact with the inner peripheral surface of the tube 11, and forms an electric path via a contact portion with the tube 11.

In the center of one and the other pin terminals 12, 13, counterbores 12A, 13A are formed along the sliding direction, respectively, and the counterbores 12A, 13A are formed.
Inside, an interior elastic body 14 using a coil spring is arranged. The interior elastic body 14 is loaded inside the pin terminals 12 and 13, and each end in the longitudinal direction is positioned in the counterbore holes 12 </ b> A and 13 </ b> A of the pin terminals 12 and 13. As a result, the pin terminals 12 and 13
Habits of moving away from each other are provided, in other words, the distance between the opposing surfaces is increased.

An outer elastic body 15 using a coil spring is disposed between one of the pin terminals 12 and 13 and the step 11A of the tube 11. The exterior elastic body 15 is located on the outer periphery of the interior elastic body 14, and has one end in the longitudinal direction at a flange portion 12B formed on the outer peripheral surface of one of the pin terminals 12, and the step portion 11A.
Are positioned at the other ends in the longitudinal direction.

The elastic modulus of the interior elastic body 14 and the exterior elastic body 15 is set under the following conditions. That is, when the one pin terminal 12 moves in a direction in which the distance between the pin terminal 13 and the opposing pin terminal 13 decreases, the inner elastic body 14 and the outer elastic body 1 move.
5 and 5 receive a combined repulsive force due to their contraction. On the other hand, the other pin terminal 13 receives a repulsive force generated when the interior elastic body 14 contracts when it moves in the direction in which the distance between the pin terminal 13 and the opposing pin terminal 12 decreases. Therefore, the repulsive force of each of the inner and outer elastic members 14 and 15 exerts a pressing force on one of the pin terminals 12, in other words,
The contact force is set as the contact load, and the repulsive force of the inner elastic body 14 is set as the pressing force, that is, the contact load, with respect to the other pin terminal 13. Therefore, the ratio of these pressing forces is set corresponding to the contact load. I have. As a result, one pin terminal 1
In No. 2, a contact load larger than that of the other pin terminal 13 is set.

Since the present embodiment has the above configuration,
The pin connector 10 is assembled according to the following procedure.
That is, the opening end of the small-diameter portion of the tube 11 on the side where the other pin terminal 13 is loaded is previously caulked to prevent the other pin terminal 13 from coming off. For this reason, the other pin terminal 13 loaded in the small-diameter portion is prevented from coming off by bringing the step formed on the outer peripheral surface into contact with the caulked portion at the opening end. Following the loading of the other pin terminal 13 into the small-diameter portion of the tube 11, the exterior elastic body 15 is inserted into the large-diameter portion of the tube 11, and is positioned by the step 11A. Further, one pin terminal 12 is loaded into the large-diameter portion of the tube 11 with one end of the interior elastic body 14 inserted into the counterbore 13 </ b> A of the other pin terminal 13, and the large-diameter portion opening of the tube 11 is opened. By crimping the end, one pin terminal 12 is prevented from coming off. Accordingly, the interior elastic body 14 and the exterior elastic body 15 are arranged at the same position in the radial direction at a part in the longitudinal direction,
In other words, they are arranged so as to overlap in the extension direction. Thereby, even when a plurality of elastic bodies are provided, the occupied space can be reduced.

Next, a connection unit using the pin connector 10 shown in FIG. 1 will be described. FIG. 2 is a schematic diagram showing a schematic configuration of a connection unit 20 for a microphone and a speaker of a mobile phone (hereinafter, a microphone will be described for the sake of convenience). In FIG. And a circuit board 22 for the amplifier and a holder 23. The microphone substrate 21 is mounted on the holder 23 and has a contact (not shown) provided therein at a position separated from the contact via the pin-type connector 10.
It is electrically connected to two contacts (not shown). The microphone body 21 and the circuit board 22 are integrated by a holder 23, and the pin-type connector 10 is loaded and fixed in a support hole formed in the holder 23.

In the configuration shown in FIG.
1 and the circuit board 22 are spaced apart from each other by the pin terminals 12 and 13.
Is smaller than the total length in the protruding position, the pin terminals 12 and 13 of the pin-type connector 10 located within the interval move in the direction approaching each other with the opposing interval reduced. When the pin terminals 12 and 13 move in a direction approaching each other, a repulsive force of the interior elastic body 14 acts on the other pin terminal 13, and the one pin terminal 12 is applied to the interior elastic body 14. When the exterior elastic body 15 contracts and deforms, a combined repulsive force from both of the elastic bodies 14 and 15 acts. Thereby, the load on the contact on the microphone body 21 side and the load on the contact on the circuit board 22 side can be made different. In addition, since the load on each contact is set in advance by the elastic modulus of the interior and exterior elastic members 14 and 15, the contact load is set to an appropriate contact load corresponding to the support rigidity of each contact.

According to the connection unit 20 shown in FIG.
Even when a plurality of elastic bodies 14 and 15 are used, since the elastic bodies 14 and 15 are arranged so as to partially overlap each other in the longitudinal direction, the length in the longitudinal direction occupied by these elastic bodies 14 and 15 is also large. Can be shortened. This allows
The length of the holder 23 can be reduced by shortening the entire length of the tube 11. Therefore, the size of the connection unit 20 can be reduced, and the size of a device equipped with the connection unit 20 can be reduced.

[0025]

According to the first aspect of the present invention, the interior elastic body whose end is positioned inside the opposing pin terminals and the exterior elastic body that presses one of the pin terminals around the outside thereof are provided. Since they are arranged, even when a plurality of elastic bodies are used, they can be arranged in a state in which a part of the elastic bodies in the longitudinal direction are overlapped to reduce the space occupied by these elastic bodies in the longitudinal direction. In the case where the space occupied by the pin terminals is reduced and different loads are applied to the opposing contacts, it is possible to prevent the structure from becoming large.

According to the second and third aspects of the present invention, the repulsive force from the plurality of elastic bodies, which are arranged so that their lengths are partially overlapped, is applied to one pin terminal, and the plurality of elastic bodies are Since only the repulsive force from one can be applied to each of the other pin terminals, different contact loads can be accurately set for each pin terminal in a state where the space occupied by the pin terminals is reduced. .

According to the fourth aspect of the present invention, the interior elastic body and the exterior elastic body, which are the elastic bodies disposed in the tube, are provided with their longitudinal portions partially overlapped. In addition, the space occupied by a plurality of elastic bodies can be reduced. Therefore, it is possible to reduce the space for disposing the connection unit and to reduce the size.

According to the fifth aspect of the present invention, a contact load due to the pressing force of only the interior elastic body and a case where the combined pressing force by using the exterior elastic body in addition to the interior elastic body are set as the contact load. Since it is possible, it is possible to secure a contact load corresponding to the support rigidity at the contact point in a device using the connection unit.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a pin connector as an example of an electrical connection device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a schematic configuration of a connection unit using the pin-type connector shown in FIG. 1;

FIG. 3 is a cross-sectional view for explaining a conventional example of a spring connector which is an example of an electrical connection device.

FIG. 4 is a sectional view showing another example of the spring connector shown in FIG. 3;

[Description of Signs] 10 Pin-type connector as an example of an electrical connection device 11 Tube 11A Step 12 One pin terminal 12A Counterbore hole 13 The other pin terminal 13A Counterbore hole 14 Interior elastic body 15 Exterior elastic body 20 Connection Unit 21 Microphone body 22 Circuit board 23 Holder

Claims (5)

[Claims] 1. An electrical connection device comprising: a pair of pin terminals each capable of abutting an opposing contact, and an elastic body for pressing the pin terminal against the contact in a conductive tube; An interior elastic body arranged at a position facing the pin terminals, and an exterior elastic body arranged on the outer periphery of the interior elastic body, wherein the pressing force of each elastic body against each pin terminal is made different. An electrical connection device comprising: 2. The interior elastic body is positioned at each end in the extension direction within the opposing surface of the pin terminal, and the exterior elastic body is disposed between the tube side and the one pin terminal in the extension direction. The electrical connection device according to claim 1, wherein the end is positioned. 3. When the one pin terminal moves in a direction in which the distance between the pin terminal and the opposing pin terminal is reduced, a pressing force commensurate with the repulsive force generated between the interior elastic body and the exterior elastic body is applied, and The electrical connection according to claim 1 or 2, wherein when the other of the terminals moves in a direction in which a distance between the terminal and the opposing pin terminal is reduced, a covering pressure commensurate with a repulsive force generated in the interior elastic body is applied. apparatus. 4. A connection unit for electrically connecting contacts provided at spaced apart positions, comprising: a pair of pin terminals capable of abutting against and contacting the contacts, respectively; An elastic body that presses toward the contact, a conductive tube in which the pin terminal and the elastic body are respectively disposed, and a support member that supports the tube between the contacts; An internal elastic body arranged at a facing portion of the pin terminal, and an external elastic body arranged between one of the pin terminals and the tube around the outer periphery of the internal elastic body. A connection unit, wherein a part of the connection units is provided so as to overlap each other. 5. A contact load obtained by combining the pressing force from the interior elastic body and the pressing force from the exterior elastic body is set to the one pin terminal, and the other pin terminal is set to the interior elastic body. The connection unit according to claim 4, wherein a contact load is set by a pressing force from a body.