JP2019175542A - Terminal connection structure - Google Patents

Abstract

To provide a small terminal connection structure with high electrical connection reliability.SOLUTION: In a terminal connection structure, a first connection terminal 10 is connected to a second connection terminal 20. The first connection terminal 10 includes a first contact portion 11 made of a conductive member and extending in a first direction (X direction). The second connection terminal 20 includes a second contact portion 21 made of a conductive member, provided with contact parts capable of contacting a side portion 15 of the first contact portion 11, and extending in the first direction. The second contact portion 21 includes a pair of elastic arms 26 that extend in a spiral shape having an axis in the first direction so that its diameter decreases from an outer periphery toward an inner periphery, and the contact parts are provided at facing ends of an inner periphery of the elastic arms 26.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a terminal connection structure in which a pair of connection terminals are connected to face each other.

  In order to electrically connect the cables, a connection terminal such as a connector is used. In connecting cables using connection terminals, a structure is often adopted in which male and female connection terminals are fitted together from the viewpoint of workability. In the terminal connection structure by fitting, the reliability of mechanical connection is important as well as the reliability of electrical connection (conduction).

  As a terminal connection structure as described above, Patent Document 1 proposes a wire connection terminal 900 as shown in FIG. FIG. 12 is an exploded perspective view of a conventional wire connection terminal 900. As shown in FIG. 12, the wire connection terminal 900 is composed of a pair of wire connection terminals 900 made of a conductive material and having the same shape structure, and a male electrical contact portion 910 at the front of the wire connection terminal 900, A female electrical contact portion 920 is formed in the middle portion, and a wire connection portion 930 is formed in the rear portion.

  In the electric wire connection terminal 900, the male electrical contact portions 910 in the two terminals are faced to face each other, and the elastic contact pieces and the cut and raised pieces that form the female electrical contact portions 920 of the mating terminals are provided. The two wire connection terminals 900 are connected by being fitted into the two. Further, the wire connection terminal 900 has a wide contact area of the electrical contact portions (male electrical contact portion 910, female electrical contact portion 920) in order to ensure connection reliability. For this reason, the length of the electric wire connection terminal 900 becomes long.

  The end portion of the covered electric wire TC is connected in contact with the electric wire connecting portion 930 in a state where the covering is peeled off. Thereby, the electric wire connection terminal 900 and the covered electric wire TC are electrically connected.

Japanese Utility Model Publication No. 61-194269

  However, there is a problem that the length of the female electrical contact portion 920 is increased in order to securely connect with the male electrical contact portion 910, and the terminal connection structure by fitting is not reduced in size.

  The present invention solves the above-described problems, and an object thereof is to provide a terminal connection structure that is small and has high connection reliability.

  In order to solve this problem, the terminal connection structure of the present invention is a terminal connection structure in which a first connection terminal and a second connection terminal are connected, and the first connection terminal is made of a conductive member, A first contact portion extending in a first direction, wherein the second connection terminal is made of a conductive member, and a contact portion capable of contacting a side surface portion of the first contact portion is provided; The second contact portion includes a pair of elastic arms extending in a spiral shape with the first direction as an axis so that the diameter decreases from the outer periphery toward the inner periphery. The contact portion is provided at an opposing end portion of the inner periphery of the elastic arm.

  According to this, since the terminal connection structure of the present invention includes the spiral elastic arm so that the second contact portion of the second connection terminal is in contact with the side surface portion of the first contact portion, the spring span is ensured. And the size of the terminal connection structure connected to the first connection terminal can be suppressed. Therefore, it is possible to provide a terminal connection structure that is small and has high electrical connection reliability.

  In the terminal connection structure according to the present invention, the elastic arm has a plate width parallel to the first direction from the outer peripheral side opposite to each other across the opposite end portion, with a range of the plate width around the axis. It is characterized by having a spirally wound shape inside.

  According to this, since the terminal connection structure of the present invention is wound spirally within the range of the plate width, the dimensions of the terminal connection structure can be further suppressed.

  In the terminal connection structure of the present invention, a third connection terminal is provided to intersect the first connection terminal, a fourth connection terminal is provided to intersect the second connection terminal, and the third connection terminal is electrically conductive. A first contact portion extending in a first direction, wherein the fourth connection terminal is formed of a conductive member, and is provided with a contact portion that can contact a side surface portion of the first contact portion. The second contact portion extends in the first direction, and the second contact portion extends in a spiral shape having the first direction as an axis so that the diameter decreases from the outer periphery toward the inner periphery. The contact portion is provided at the opposite end of the inner periphery of the elastic arm, and a twisted pair cable is connected from the first connection terminal to the non-connection side of the fourth connection terminal. It is a feature.

  According to this, the terminal connection structure of the present invention can shorten the dimension in the X1 direction of the terminal connection structure and can be close to the twist pitch of the twisted pair cable, so that the adjacent magnetic field can be canceled effectively. It becomes possible and radiation noise can be effectively suppressed.

  The terminal connection structure of the present invention can be miniaturized.

1 is an external view of a terminal connection structure according to a first embodiment of the present invention. It is a perspective view showing the state where the 1st connecting terminal concerning the 1st embodiment of the present invention and the 2nd connecting terminal were connected. (A) concerning 1st Embodiment of this invention is a perspective view of a 2nd connection terminal, (b) is a perspective view of a 1st connection terminal. It is the perspective view which looked at the state where the 1st contact part concerning the 1st embodiment of the present invention and the 2nd contact part were connected from the 1st contact part side. It is the top view which looked at the state which the 1st contact part and 2nd contact part concerning 1st Embodiment of this invention connected from the upper direction. It is sectional drawing in the AA of FIG. It is the perspective view which looked at the state where the 1st contact part concerning the 1st embodiment of the present invention and the 2nd contact part were connected from the 2nd contact part side. It is the perspective view which looked at the 2nd contact part concerning a 1st embodiment of the present invention from the guide part side. It is the perspective view which looked at the 2nd contact part concerning a 1st embodiment of the present invention from the elastic arm side. (A) of the 2nd contact part concerning 1st Embodiment of this invention is the top view seen from the guide part side, (b) is the top view seen from the elastic arm side. The example which applied the terminal connection structure concerning 1st Embodiment of this invention to the connector for twisted pair cables is shown. It is the schematic of the male type and female type electric wire connection terminal 900 of a prior art example.

[First Embodiment]
Hereinafter, a terminal connection structure 100 according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is an external view of the terminal connection structure 100. FIG. 2 is a perspective view showing a state in which the first connection terminal 10 and the second connection terminal 20 are connected. 3A is a perspective view of the second connection terminal 20, and FIG. 3B is a perspective view of the first connection terminal 10. FIG. 4 is a perspective view of the state where the first contact portion 11 and the second contact portion 21 are connected as viewed from the first contact portion 11 side. FIG. 5 is a plan view of the state in which the first contact portion 11 and the second contact portion 21 are connected as seen from above. 6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a perspective view of the state where the first contact part 11 and the second contact part 21 are connected as seen from the second contact part 21 side. FIG. 8 is a perspective view of the second contact portion 21 as viewed from the guide portion 28 side. FIG. 9 is a perspective view of the second contact portion 21 as viewed from the elastic arm 26 side. FIG. 10A is a plan view of the second contact portion 21 viewed from the guide portion 28 side, and FIG. 10B is a plan view of the second contact portion 21 viewed from the elastic arm 26 side.

  As shown in FIG. 1, the terminal connection structure 100 of the present invention includes a first connection terminal 10 connected to one cable CA and a second connection terminal 20 connected to the other cable CA. In addition, as shown in FIG. 1, the terminal connection structure 100 electrically connects the cables CA by fitting (connecting) the first connection terminal 10 and the second connection terminal 20.

  The first connection terminal 10 of the terminal connection structure 100 is manufactured by pressing or bending a metal plate (for example, phosphor bronze, which is a copper alloy), which is a conductive member having elasticity, using a die or the like. Parts. The first connection terminal 10 is a male connection terminal as shown in FIGS. 2 and 3B.

  As shown in FIG. 1 and FIG. 3B, the first connection terminal 10 includes a first contact portion 11 extending in the first direction (X direction), a first cable connection portion 13 connected to the cable CA, and The first connecting portion 12 is disposed between the first contact portion 11 and the first cable connecting portion 13.

  As shown in FIG. 2 and FIG. 3B, the first contact portion 11 of the first connection terminal 10 is formed in a prismatic shape at one end and is formed in a flat plate shape at the other end. It is connected. Further, one end of the first contact portion 11 has a side surface portion 15 in the Z direction as shown in FIG.

  As shown in FIG. 3B, the first connection portion 12 of the first connection terminal 10 is formed in a rectangular shape and is formed integrally with the first cable connection portion 13.

  As shown in FIG. 3B, a part of the first cable connection portion 13 of the first connection terminal 10 is formed in a cylindrical shape. Further, as shown in FIG. 1, the first cable connection portion 13 is connected by caulking or soldering or the like by inserting a core wire from which the cable CA has been peeled off into the cylindrical tube.

  The second connection terminal 20 of the terminal connection structure 100 is manufactured by performing a pressing process, a bending process, or the like on a metal plate (for example, phosphor bronze, which is a copper alloy), which is a conductive member having elasticity, using a die or the like. Parts. The second connection terminal 20 is a female connection terminal as shown in FIGS. 2 and 3A.

  As shown in FIG. 1 and FIG. 3A, the second connection terminal 20 includes a second contact portion 21 extending in the X direction, a second cable connection portion 23 connected to the cable CA, and a second contact portion. And a second connecting portion 22 disposed between the second cable connecting portion 23 and the second cable connecting portion 23.

  As shown in FIG. 2 and FIG. 3A, the second contact portion 21 of the second connection terminal 20 has an elastic arm 26 and a guide portion 28 provided with a guide hole 28a at one end, The end is connected to the second connecting portion 22.

  The 2nd connection part 22 of the 2nd connection terminal 20 is formed in a rectangular parallelepiped, and is connected to the 2nd cable connection part 23, as shown to Fig.3 (a).

  A part of the second cable connection 23 of the second connection terminal 20 is formed in a cylindrical shape as shown in FIG. Further, as shown in FIG. 1, the second cable connection 23 is connected by caulking or soldering or the like by inserting a core wire from which the cable CA is stripped into the cylindrical tube.

  As shown in FIGS. 8 to 10, the second contact portion 21 has a guide portion 28, a pair of elastic arms 26, a pair of opposed end portions 27 symmetrical to the axis AL, and a convex shape at the opposed end portion 27. And a pair of contact portions 25 formed on each other.

  As shown in FIGS. 8 and 10A, the guide portion 28 of the second contact portion 21 is formed in a flat plate shape having a quadrangular guide hole 28a in the substantially central portion. Further, the guide hole 28 a is formed in a dimension that allows the first contact portion 11 of the first connection terminal 10 to be inserted.

  As shown in FIGS. 8 to 10, the opposing end portion 27 of the second contact portion 21 is formed in a plate shape whose one end is parallel to the axis AL, and the other end is the guide portion 28, that is, the first contact portion 11. It is formed in a shape that widens toward the insertion side. Further, as shown in FIG. 9, the opposed end portion 27 is disposed at one end on the inner peripheral side of the elastic arm 26.

  As shown in FIGS. 9 and 10, the contact portion 25 of the second contact portion 21 is formed in a convex shape on the axis AL side of the opposed end portion 27. Further, the distance between the pair of contact portions 25 is formed to be shorter than the thickness dimension of the first contact portion 11 so as to be able to contact the side surface portion 15 of the first contact portion 11.

  As shown in FIGS. 9 and 10B, the pair of elastic arms 26 of the second contact portion 21 is formed in a spiral shape extending so that the diameter decreases from the outer periphery toward the inner periphery with respect to the axis AL. ing. Further, as shown in FIG. 9, a guide portion 28 is connected to the end portion of the elastic arm 26.

  As shown in FIGS. 9 and 10B, the elastic arm 26 is a plate of the guide portion 28 whose plate surface parallel to the X direction is centered on the axis AL from the outer peripheral side facing each other with the opposed end portion 27 interposed therebetween. It has a shape wound spirally within the range of the width WB (see FIG. 10).

  Since the elastic arm 26 is formed as described above, the spring span can be formed long by shortening the dimension in the X direction shown in FIG. For this reason, the 2nd contact part 21 which needs to produce a desired bending with the connection of the 1st contact part 11 can be formed short (small) in the X direction.

  Here, regarding the connection between the first connection terminal 10 and the second connection terminal 20 of the terminal connection structure 100, the connection structure between the first contact portion 11 and the second contact portion 21 will be described with reference to FIGS. explain.

  The opposing end portion 27 of the second contact portion 21 is disposed so as to face the side surface portion 15 of the first contact portion 11 as shown in FIGS. 6 and 7.

  As shown in FIGS. 6 and 7, in the pair of elastic arms 26, the contact portion 25 comes into pressure contact with the side surface portion 15 of the first contact portion 11 from the vertical direction (Z direction) via the opposed end portion 27. I am adding power.

  One end of the first contact portion 11 is inserted into the guide hole 28a along the axis AL from the Z2 direction toward the guide portion 28 of the second contact portion 21 as shown in FIG. The first contact portion 11 and the second contact portion 21 are fitted to each other. At this time, since the other end side of the opposed end portion 27 is widened toward the guide portion 28, one end of the first contact portion 11 is a pair of opposed end portions 27 as shown in FIGS. 4 to 7. The first connection terminal 10 can be easily inserted into the second connection terminal 20 by being reliably guided in between.

  By fitting the first contact portion 11 and the second contact portion 21 as described above, as shown in FIG. 6, the contact portion 25 of the second contact portion 21 faces the side surface of the first contact portion 11 from the Z direction. By making contact with the part 15, the first contact part 11 (first connection terminal 10) and the second contact part 21 (second connection terminal 20) are electrically connected.

  When the terminal connection structure 100 configured as described above is connected once, vibration and impact are applied to the first contact portion 11 and the second contact portion 21, and the contact position between the side surface portion 15 and the contact portion 25. Even if the position shifts, since the spring span of the elastic arm 26 is long and the spring property is high, the restoring force to restore the original contact position becomes high. For this reason, the terminal connection structure 100 has high electrical connection reliability.

  Next, an example in which the terminal connection structure 100 of the present invention is used as a connection connector for a twisted pair cable is shown in FIG. The cable CA, the first connection terminal 10, and the second connection terminal 20 in FIG. 11 are the same as those in the first embodiment, and the details thereof are omitted.

  The third connection terminal 110 is basically a male connection terminal having a structure equivalent to that of the first connection terminal 10 and is formed so as to intersect the lower side (Z2 direction) of the first connection terminal 10. The tip is bent to the upper side (Z1 direction) and the tip is aligned with the tip of the first connection terminal 10 at substantially the same height.

  The fourth connection terminal 120 is basically a female connection terminal having a structure equivalent to that of the second connection terminal 20, and is formed so as to intersect with the upper side (Z1 direction) of the second connection terminal 20, and is connected to the cable CA2. Is done.

A pair of cables CA and CA2 constitute a twisted pair cable. As is well known, in twisted pair cables, the direction of the magnetic field generated by the current flowing in each cable is reversed for each twist pitch, so the adjacent magnetic field is canceled and the cable (
Radiation noise generated from CA and CA2) can be suppressed. For this reason, in the case of the example shown in FIG. 11, the dimension in the X1 direction of the terminal connection structure 100 can be shortened, and it can be brought close to the twist pitch of the twisted pair cable, so that adjacent magnetic fields can be canceled effectively. Therefore, radiation noise can be effectively suppressed.

  The effect in the terminal connection structure 100 of 1st Embodiment of this invention comprised as mentioned above is demonstrated collectively below.

  Since the terminal connection structure 100 of the present invention includes the spiral elastic arm 26 so that the second contact portion 21 of the second connection terminal 20 contacts the side surface portion 15 of the first contact portion 11, the spring span is reduced. The size of the terminal connection structure 100 that can be secured and connected to the first connection terminal 10 can be suppressed. For this reason, the terminal connection structure 100 which is small and has high electrical connection reliability can be provided.

  Moreover, since it is wound spirally within the range of the plate width WB, the dimensions of the terminal connection structure 100 can be further suppressed.

  Moreover, since the dimension in the X1 direction of the terminal connection structure 100 can be shortened and can be brought close to the twist pitch of the twisted pair cable, it is possible to effectively cancel adjacent magnetic fields and effectively suppress radiation noise. Can do.

<Modification 1>
In the first embodiment, one end of the first contact portion 11 of the first connection terminal 10 is formed in a prismatic shape, but may be formed in a columnar shape. Accordingly, the guide hole 28a of the guide portion 28 of the second contact portion 21 may be formed in a circular shape.

<Modification 2>
In the first embodiment, the first connection terminal 10 and the second connection terminal 20 are not subjected to plating treatment, but in order to prevent oxidation of the metal surface and reduce the contact resistance between the side surface portion 15 and the contact portion 25. Gold plating (nickel base) may be applied.

<Modification 3>
In the first embodiment, the first connection terminal 10 and the second connection terminal 20 use a phosphor bronze metal plate that is a copper alloy, but when the core wire of the cable CA is formed of an aluminum material, the aluminum alloy is used. You may use the metal plate material which has as a main component.

DESCRIPTION OF SYMBOLS 10 1st connection terminal 11 1st contact part 12 1st connection part 13 1st cable connection part 15 Side part 20 2nd connection terminal 21 2nd contact part 22 2nd connection part 23 2nd cable connection part 25 Contact part 26 Elasticity Arm 27 Opposite end portion 28 Guide portion 28a Guide hole 100 Terminal connection structure 110 Third connection terminal 120 Fourth connection terminal AL Axis CA cable CA2 Cable WB Plate width

Claims (3)

A terminal connection structure in which the first connection terminal and the second connection terminal are connected,
The first connection terminal is made of a conductive member and has a first contact portion extending in a first direction,
The second connection terminal is made of a conductive member, provided with a contact portion that can come into contact with a side surface portion of the first contact portion, and has a second contact portion extending in the first direction,
The second contact portion includes a pair of elastic arms extending in a spiral shape having an axis line in the first direction so that the diameter decreases from the outer periphery toward the inner periphery, and the contact portion is an inner periphery of the elastic arm. A terminal connection structure, characterized by being provided at opposite ends.   The elastic arm has a shape in which a plate surface parallel to the first direction is spirally wound within a range of a plate width around the axis from the outer peripheral sides facing each other across the opposite end portion. The terminal connection structure according to claim 1, wherein the terminal connection structure is provided. A third connection terminal is provided to cross the first connection terminal, a fourth connection terminal is provided to cross the second connection terminal, and the third connection terminal is made of a conductive member and extends in the first direction. Having a first contact portion to be brought out,
The fourth connection terminal is made of a conductive member, and is provided with a contact portion that can come into contact with the side surface portion of the first contact portion, and has a second contact portion that extends in the first direction,
The second contact portion includes a pair of elastic arms extending in a spiral shape having an axis line in the first direction so that the diameter decreases from the outer periphery toward the inner periphery, and the contact portion is an inner periphery of the elastic arm. 2. The terminal connection structure according to claim 1, wherein a twisted pair cable is provided at the opposite end portion, and a twisted pair cable is connected from the first connection terminal to the non-connection side of the fourth connection terminal.