JP2005327518A - Conductive pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive pin capable of preventing contact between a movable pin and a fixed pin from becoming unstable even when external force such as vibration or shock is applied. <P>SOLUTION: Since the shortest current-carrying path for carrying a current from a first printed circuit board 15 to the movable pin 11, then from the movable pin 11 to a displacement part of a spring 13, from the displacement part of the spring 13 to the fixed pin 12, from the fixed pin 12 to a lid 14, and from the lid 14 to a second printed circuit board 16 is ensured in operation, a conical large diameter part at the lower end of the movable pin 11 continuously presses the displacement part located at an end of the spring 13 even when vibration or shock is applied to this conductive pin, whereby the current-carrying path of a current-carrying route from the movable pin 11 through the ends of the spring 13 to the fixed pin 12 can be maintained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a current-carrying pin used for a connector for a charger, and more particularly to a current-carrying pin that stabilizes electrical contact between a movable pin and a fixed pin.

  FIG. 5 is a cross-sectional view showing the configuration of a conventional energizing pin disclosed in Patent Document 1 below. As shown in FIG. 5, the conventional energizing pin includes a spring 53 and a movable pin in a cylindrical fixed pin 52. 51, and the mouth of the fixing pin 52 was swaged and fixed. The lower end of the movable pin 51 has a flat shape.

  FIG. 6 is a cross-sectional view for explaining the operation of the conventional energizing pin shown in FIG. 5, and FIG. 6 (a) shows the state when the conventional energizing pin is in a good contact operation state. FIG. 6B is a cross-sectional view showing a state when the conventional energizing pin is in an unstable contact operation state.

  In FIG. 6A, the conventional energization pin is in a good contact operation state, that is, the movable pin 51 and the second printed circuit board 56 which are in contact with the first printed circuit board 55 by contact pressure applied by the elasticity of the spring 53. When the fixed pin 52 soldered to the surface is in stable contact, there is an energization path that lowers the electrical resistance between the two, so that the electrical connection between the movable pin 51 and the fixed pin 52 is excellent. Will be done.

  In this case, the current flows from the first printed circuit board 55 to the movable pin 51, then from the movable pin 51 to the fixed pin 52, and further from the fixed pin 52 to the second printed circuit board 56, There is a second energization route that flows from one printed board 55 to the movable pin 51, then from the movable pin 51 to the spring 53, from the spring 53 to the fixed pin 52, and from the fixed pin 52 to the second printed board 56. doing.

  Since the contact resistance (DC resistance) between the conductive materials increases as the energization path becomes longer, the resistance value increases. Therefore, in the second energization path, the spring 53 that is normally spirally wound is used. Since it passes, the energization path becomes longer and the resistance value increases.

  Further, when the resistance value increases, the conduction loss inside the pin increases, and the target current cannot flow.

  For example, when the above-described conventional energizing pin is used as a charging terminal pin, if the conduction loss inside the pin has increased, it takes a long time to fully charge the battery. There was a problem that charging did not end within the time.

  In order to solve this problem, it is important to make the energization path as short as possible so that current can flow.

  Therefore, with respect to the conventional energization pin, it is desirable to ensure the first energization route that shortens the energization route as the energization route.

  Normally, a clearance (backlash) is provided between the movable pin 51 and the fixed pin 52 in order to move the movable pin 51 within the fixed pin 52.

  However, in the conventional energizing pin, when an external force such as vibration or impact is applied during use (for example, during charging), either the movable pin 51 or the fixed pin 52 is moved, as shown in FIG. As described above, the clearance that originally exists between the movable pin 51 and the fixed pin 52 causes a situation in which they are not in contact with each other, that is, the contact between the movable pin 51 and the fixed pin 52 is separated. In some cases, the energization path of the route is cut off and only the energization path of the second energization route is obtained.

Only in the energization path of the second energization route, the energization path becomes long because the current passes through the spring 53, and in the energization pin used as the charging terminal, as described above, the charging time becomes long, and a predetermined time. There was a problem that charging did not end inside.
Japanese Patent Laid-Open No. 10-40990

  The present invention solves the above-described conventional problems, and an object thereof is to provide an energizing pin that prevents the contact between the movable pin and the fixed pin from becoming unstable even when an external force such as vibration or impact is applied. To do.

  In order to achieve the above object, the present invention includes an elastic body and a movable pin provided in a fixed pin, and the movable pin that moves against the elastic force of the elastic body contacts the fixed pin to electrically In the current-carrying pin for performing a general connection, the movable pin has a large-diameter portion whose lower end is conical or spherical, and the large-diameter portion receives the elastic force of the elastic body, and the movable pin When the pin is pressed, a part of the elastic body is interposed between the large diameter portion and the fixed pin, and electrical connection is made between the movable pin and the fixed pin.

  According to the present invention, for example, a part of an elastic body such as a coil spring is interposed between the large-diameter portion at the lower end of the movable pin and the fixed pin, and electrical connection is made between the movable pin and the fixed pin. Even when an external force such as the above is applied, the contact does not become unstable due to the absorption action by the elastic body, and the conventional problems can be improved.

  In addition, since a part of the elastic body is interposed between the large-diameter portion at the lower end of the movable pin and the fixed pin, and the electrical connection is reliably established between the movable pin and the fixed pin, there are a plurality of energization routes. An energization route having a low resistance value can be secured and stable electrical connection can be made.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing the configuration of the energization pin according to the first embodiment of the present invention. In FIG. 1, the energizing pin according to the first embodiment of the present invention is an energizing pin having a movable pin 11 that operates with respect to the fixed pin 12, and the lower end of the movable pin 11 is conical or spherical (not shown). The large-diameter portion is pressed by an elastic body (spring) 13 provided in the fixed pin 12, and the movable pin 11 is interposed through a part of the elastic body (spring) 13. The fixing pin 12 is stably contacted to be electrically connected.

  Note that the shape of the lower end can be freely selected as long as it is conical or spherical, such as a cone or a pyramid.

  FIG. 2 is a top view showing the structure of the elastic body according to the first embodiment of the present invention. And the elastic body shown to Fig.2 (a) is comprised with the spring (coil spring), and has the displacement part 21 which displaced the circular shape of the winding end to the outer side. Further, the elastic body shown in FIG. 2B is constituted by a spring (coil spring), and has a displacement portion 22 in which the tip of the winding end is displaced outward.

  In the energization pin according to the first embodiment of the present invention, an elastic body 13 is used as shown in FIGS. 2 (a) and 2 (b). In addition, if it is a spring which has the displacement part which displaced the shape of the winding end to the outer side, it will not be limited to the shape of Fig.2 (a) and FIG.2 (b).

  Although the movable pin 11 and the elastic body (spring) 13 are accommodated in the fixed pin 12 shown in FIG. 1, the movable pin 11 and the fixed pin 12 are further in stable contact so that they do not escape from the fixed pin 12. Thus, a mouth portion is formed in advance at the upper end of the fixing pin 12, and a lid 14 is applied to the lower end of the fixing pin 12. The lid 14 is made of a strong and conductive material, such as a metal, for applying an elastic load (spring load).

  The mouth provided on the fixed pin 12 is pre-configured by caulking or the like, and when the energizing pin is assembled, the movable pin 11 and the elastic body (spring) 13 are passed through the fixed pin 12 in this order, Assemble by attaching and fixing the lid 14.

  This energizing pin has a structure in which when the movable pin 11 is pressed, the elasticity of the elastic body 13 is applied and a restoring force is applied, and when used, the lid 14 side is soldered to the second printed circuit board (see FIG. 3). The movable pin 11 is made conductive by applying contact pressure to the first printed circuit board (see FIG. 3). The movable pin 11 and the first printed circuit board in contact with the movable pin 11 can be separated.

  FIG. 3 is a cross-sectional view for explaining the operation of the energizing pin according to the first embodiment of the present invention shown in FIG. 1, and FIG. 3 (a) is the first embodiment of the present invention. It is sectional drawing which shows a mode when the electricity supply pin which concerns on is in a favorable contact operation state, FIG.3 (b) is when the electricity supply pin which concerns on the 1st Embodiment of this invention is in an unstable contact operation state It is sectional drawing which shows the mode.

  In FIG. 3A, when the energizing pin according to the first embodiment of the present invention is in a good contact operation state, as shown in FIG. 1, the lower end of the movable pin 11 is a thick cone-shaped or spherical shape. Since the diameter portion presses the spring 13 having the displacement portion 21 as shown in FIG. 2A or the spring 13 having the displacement portion 22 as shown in FIG. 2B, pressure in the thrust direction and the radial direction is applied. The combined pressure pushes the lower end of the movable pin 11 so that a part of the spring 13, that is, the displacement portions 21 and 22 are pressed against the inner wall of the fixed pin 12.

  The movable pin 11 is inclined by pressing the spring 13 having the displacement portion 21 as shown in FIG. 2A or the spring 13 having the displacement portion 22 as shown in FIG. For this reason, the movable pin 11 and the fixed pin 12 come into contact at two locations, that is, contact at the mouth of the fixed pin 12 and contact at the inner wall of the fixed pin 12 as shown in FIG. Stability is ensured.

  In FIG. 3A, the current is transferred from the first printed circuit board 15 to the movable pin 11, then from the movable pin 11 to the fixed pin 12, from the fixed pin 12 to the cover 14, and from the cover 14 to the second printed circuit board. 16 from the first printed circuit board 15 to the movable pin 11, then from the movable pin 11 to the spring 13, from the spring 13 to the lid 14 through the fixed pin 12, and from the lid 14 to the second The second energization route that flows through the printed circuit board 16 and the first printed circuit board 15 to the movable pin 11, and then the movable pin 11 to the displacement portion of the spring 13 (see FIG. 2) and the displacement portion of the spring 13 are fixed. The pin 12 has a third energization route that flows from the fixing pin 12 to the lid 14 and from the lid 14 to the second printed circuit board 16.

  Usually, the first to third energization routes are secured and a stable electrical connection is made.

  In order to move the movable pin 11 within the fixed pin 12, a clearance (backlash) is provided in advance between the movable pin 11 and the fixed pin 12 as in the conventional example. When an external force such as vibration or impact is applied to the energizing pin according to the first embodiment of the present invention and either the movable pin 11 or the fixed pin 12 moves, the movable pin 11 moves as shown in FIG. A situation occurs in which the clearance between the pin 11 and the fixed pin 12 does not come into contact with each other, that is, the movable pin 11 and the fixed pin 12 are separated from each other, thereby energizing the first energization route. The route is cut off. However, in the energization pin according to the first embodiment of the present invention, the second and third energization routes are still ensured even when an external force such as vibration or impact is applied to the energization pin.

  In particular, since the third energization route is ensured, the energization pin according to the first embodiment of the present invention can pass a current through the shortest energization route, and thus can suppress an increase in resistance value and be stable. Electrical connection can be made.

  For example, when the energizing pin according to the first embodiment of the present invention is used as the charging terminal pin, a part of the winding end of the spring 13 via the movable pin 11, that is, the displacement portions 21 and 22 are movable pins. Since the movable pin 11 is pressed against the fixed pin 12 through the displacement portion of the spring 13 by being pushed and expanded by the cone-shaped large diameter portion at the lower end of 11, the electrical connection is stabilized.

  Therefore, even when an external force such as vibration or impact is applied to the energizing pin according to the first embodiment of the present invention, the cone-shaped large diameter portion at the lower end of the movable pin 11 pushes the displacement portion at the end of the spring 13. Since it continues, the energization route of the energization route from the movable pin 11 through the end of the spring 13 to the fixed pin 12 can be maintained.

  Therefore, even when an external force such as vibration or impact is applied to the energization pin according to the first embodiment of the present invention, the resistance value does not increase with respect to the contact resistance, and stable energization can be ensured.

  FIG. 4 is a cross-sectional view showing the configuration of the energization pin according to the second embodiment of the present invention. In FIG. 4, the energizing pin according to the second embodiment of the present invention has a large-diameter portion in which the lower ends of the first movable pin 41 and the second movable pin 44 are conical or spherical (not shown). The large diameter portion is pressed by an elastic body (spring) 43 provided in the fixed pin 42, and each of the first movable pin 41 and the second movable pin 44 is a part of the elastic body (spring) 43. Through this, the fixing pin 42 is stably contacted to be electrically connected.

  In the energization pin according to the second embodiment of the present invention, an elastic body 43 having the same configuration as the elastic body according to the first embodiment as shown in FIGS. 2A and 2B is used. . However, in the elastic body 43 according to the second embodiment of the present invention, the circular shape of the winding end is displaced outward not only at the upper end but also at the lower end in the same manner as in FIGS. 2 (a) and 2 (b). It has a displacement part which displaced the tip of a displacement part or a winding end outside.

  The energizing pin according to the second embodiment of the present invention shown in FIG. 4 is configured by housing the first movable pin 41, the second movable pin 44 and the elastic body (spring) 43 in the fixed pin 42. . In order to prevent the first movable pin 41, the second movable pin 44, and the elastic body (spring) 43 from escaping from the fixed pin 42, the first movable pin 41, the second movable pin 44, and the fixed pin are further prevented. In order to make a stable contact with 42, the upper end and the lower end of the fixing pin 42 are swaged to form a mouth portion.

  The elastic body 43 applies an elastic load (spring load) to the first movable pin 41 and the second movable pin so as to come into contact with a printed circuit board (not shown). It is made of a robust conductive material capable of applying a larger elastic load (spring load).

  By the way, the energizing pin according to the second embodiment of the present invention has a structure in which when the movable pin 41 or 44 is pressed, the elastic body 43 is elastically applied and a restoring force is applied. Is made conductive by applying contact pressure to the first printed circuit board (see FIG. 3), and the second movable pin 44 side is made conductive by applying contact pressure to the second printed circuit board (see FIG. 3). Therefore, the 1st movable pin 41 and the 2nd movable pin 44, and the 1st printed circuit board (not shown) and the 2nd printed circuit board (not shown) which contact this are separable, respectively. It is. For this reason, there is an advantage that electrical connection can be performed without soldering connection as compared with the conventional energization pin and the energization pin according to the first embodiment.

  Then, when an external force such as vibration or impact is applied to the energizing pin according to the second embodiment of the present invention, any of the first movable pin 41, the second movable pin 44, or the fixed pin 42 moves. However, like the energization pin according to the first embodiment, the second and third energization routes are secured.

  In particular, since the third energization route is ensured, the energization pin according to the second embodiment of the present invention can pass a current through the shortest energization route, and thus can suppress an increase in resistance value and be stable. Electrical connection can be made.

  Conventionally, a coaxial connector is known in which a current-carrying pin is arranged at the center and held as a center contact in an insulating holder, and the insulating holder is housed in a case. Therefore, according to the above-described embodiment of the present invention. By applying the current-carrying pin to such a coaxial connector, a coaxial connector capable of performing stable electrical connection can be provided.

Sectional drawing which shows the structure of the electricity supply pin which concerns on the 1st Embodiment of this invention, The top view which shows the structure of the elastic body which concerns on the 1st Embodiment of this invention, Sectional drawing for demonstrating operation | movement of the electricity supply pin which concerns on the 1st Embodiment of this invention, Sectional drawing which shows the structure of the electricity supply pin which concerns on the 2nd Embodiment of this invention, Sectional drawing which shows the structure of the conventional electricity supply pin, It is sectional drawing for demonstrating operation | movement of the conventional electricity supply pin.

Explanation of symbols

11 movable pin 12 fixed pin 13 elastic body (spring)
14 Lid 15 First Printed Circuit Board 16 Second Printed Circuit Board 21, 22 Displacement Part 41 First Movable Pin 42 Fixed Pin 43 Elastic Body (Spring)
44 Second movable pin 51 Movable pin 52 Fixed pin 53 Elastic body (spring)
55 1st printed circuit board 56 2nd printed circuit board

Claims (8)

An energizing pin comprising an elastic body and a movable pin provided in a fixed pin, wherein the movable pin movable against the elastic force of the elastic body is in contact with the fixed pin to make an electrical connection. The pin has a large-diameter portion whose lower end is conical or spherical, the large-diameter portion is adapted to receive the elastic force of the elastic body, and when the movable pin is pressed, A current-carrying pin, wherein a portion is interposed between the large-diameter portion and the fixed pin, and electrical connection is made between the movable pin and the fixed pin. The elastic body includes a displacement portion in which a part of the elastic body is displaced outward, and the movable pin and the fixed pin are electrically connected via the displacement portion when the movable pin is pressed. The energizing pin according to claim 1. An energizing pin comprising an elastic body and a movable pin provided in a fixed pin, wherein the movable pin that moves against the elastic force of the elastic body is in contact with the fixed pin for electrical connection. The first movable pin and the second movable pin have a large-diameter portion whose lower end is conical or spherical, and the large-diameter portion is the When the first movable pin and the second movable pin are pressed, a part of the elastic body is interposed between the large diameter portion and the fixed pin. An energization pin, wherein the first movable pin, the second movable pin, and the fixed pin are electrically connected. The elastic body includes a displacement portion in which a part of an upper end and a lower end of the elastic body is displaced outward, and the first movable pin and the second movable pin are pressed via the displacement portion when the first movable pin and the second movable pin are pressed. 4. The energization pin according to claim 3, wherein an electrical connection is made between the first movable pin, the second movable pin, and the fixed pin. 5. The energizing pin according to claim 2, wherein the elastic body is a coil spring having a displacement portion formed by expanding a winding end on the movable pin side outward. 5. The energization pin according to claim 2, wherein the elastic body is a coil spring having a displacement portion configured by bending a distal end of a winding end on the movable pin side outward. The electrical connection between the movable pin and the fixed pin via the displacement portion of the coil spring is maintained even when the movable pin and the fixed pin are not in contact with each other due to an external force. An energizing pin according to claim 5 or claim 6. 8. A coaxial connector comprising the energizing pin according to claim 1 disposed at a central portion and held by an insulating holder as a central contact, and the insulating holder is accommodated in a case.

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