JP2019169243A - Terminal fitting - Google Patents

Abstract

To provide a terminal fitting capable of securing connection reliability.SOLUTION: A terminal fitting 10 comprises: a first connection region 18; and a second connection region 19 communicated to the first connection region 18 via a coupling region. The first connection region 18 includes: a first wire barrel part 24 crimped and connected to a core wire part 61 in which coated films 62 and 63 are removed and exposed in a middle of a length direction of a first electric wire 60; and a first insulation barrel part 23 crimped and connected to the coating film 62 of the first electric wire 60 in parallel to the first wire barrel part 24. The second connection region 19 includes a second wire barrel part 34 crimped and connected to a core wire part 71 in which the coating film 72 is removed and exposed in a terminal part 74 of a second electric wire 70.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a terminal fitting.

  Patent Document 1 discloses a joint terminal in which two electric wires are connected to enable conduction between the two electric wires. The joint terminal has a first electric wire crimping portion and a second electric wire crimping portion corresponding to each electric wire. Of the electric wires, one of the electric wires has its end portion removed and the core wire portion exposed, the first electric wire crimping portion is crimped and connected to the end of the core wire portion, and the other electric wire is long An intermediate portion covering in the middle of the length direction is removed to expose the core wire portion, and the second electric wire crimp portion is crimped and connected to the intermediate core wire portion.

Japanese Patent Laid-Open No. 2006-81625

  By the way, since the other electric wire in the above has a portion extending on both sides in the length direction with the intermediate portion interposed therebetween, when this portion vibrates or is pulled, the connecting portion between the core wire portion and the second electric wire crimping portion is used. There is a situation where an excessive load (stress) is applied. As a result, there is a concern that the connection state between the other electric wire and the second electric wire crimping portion is not properly maintained and the connection reliability is impaired.

  This invention is completed based on the above situations, Comprising: It aims at providing the terminal metal fitting which can ensure connection reliability.

  The present invention is a terminal fitting to which a first electric wire and a second electric wire are connected, and the first wire is connected by being crimped to the exposed core wire portion in the middle of the first electric wire in the length direction. A first connection region having a barrel portion and a first insulation barrel portion connected by crimping to the coating of the first electric wire along with the first wire barrel portion, and a connection region connected to the first connection region And a second connection region having a second wire barrel portion that is connected to the core portion exposed by removing the coating at the end portion of the second electric wire.

  When the first electric wire is vibrated or pulled, stress is also applied to the connecting portion between the covering of the first electric wire and the first insulation barrel portion, and the connecting portion between the core wire portion of the first electric wire and the first wire barrel portion. Since the stress applied to the first wire can be relaxed, the connection reliability between the core wire portion of the first electric wire and the first wire barrel portion can be ensured. On the other hand, since the terminal portion of the second electric wire is crimped and connected, the influence of vibration and pulling is not as great as that of the first electric wire, and the connection state between the core portion of the second electric wire and the second wire barrel portion is maintained. For example, by omitting a portion corresponding to the insulation barrel portion, it is possible to simplify the structure of the terminal fitting and to avoid an increase in the size of the terminal fitting.

In Example 1 of this invention, it is a top view of the terminal metal fitting to which the 1st electric wire and the 2nd electric wire were connected. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a top view of a terminal metal fitting. It is a side view of a terminal metal fitting. It is a front view of a terminal metal fitting.

Preferred embodiments of the present invention are shown below.
(1) A rib is projected from the connection region. According to this, since the connection area is reinforced by the rib, it is possible to prevent the connection area from being deformed even when the width dimension of the connection area is increased.

  (2) The connection region has a first support surface on which the coating of the first electric wire is placed and a second support surface on which the coating of the second electric wire is placed. According to this, since the 1st electric wire and the 2nd electric wire can acquire the support function of a connection field, even if it receives vibration force etc., it becomes difficult to play. As a result, the connection reliability between the core wire portion of the first electric wire and the first wire barrel portion and the connection reliability between the core wire portion of the second electric wire and the second wire barrel portion can be better ensured.

  (3) The first connection region and the second connection region are disposed so as to protrude opposite to each other via the connection region, and the one insulation barrel portion is configured with respect to the length direction of the first electric wire. The first wire barrel portion is disposed at the outermost portion on one side of the first connection region opposite to the first support surface across the first wire barrel portion, and the second wire barrel portion is a length of the second electric wire. With respect to the direction, it is installed at the outermost end on the other side of the second connection region. According to this, since the portion corresponding to the insulation barrel portion is not installed at the outermost end portion on the other side of the second connection region, it is possible to avoid the terminal fitting from becoming large in the length direction of the second electric wire. it can. Here, even if the second electric wire does not have a portion corresponding to the insulation barrel portion, the connection state between the core wire portion of the second electric wire and the second wire barrel portion is maintained by obtaining the support function of the connection region. be able to. In addition to the function of supporting the connection region, the first electric wire has a core portion of the first electric wire and a first wire barrel portion by a first insulation barrel portion installed at one end of the first connection region. The connection state with can be maintained well.

<Example 1>
The first embodiment will be described below with reference to FIGS. The terminal fitting 10 according to the first embodiment exemplifies an intermediate terminal installed for branch connection at a position where a branch line branches from a main line in a wire harness routed in a vehicle (not shown).

  In the case of the first embodiment, the trunk line constitutes the first electric wire 60. The first electric wire 60 is a thick covered electric wire, as shown in FIG. 3, a core wire portion 61 in which a plurality of metal strands 66 are twisted together, and an insulating resin coating 62 that covers the outer periphery of the core wire portion 61, 63. As shown in FIG. 1, the intermediate portion 64 in the middle of the length direction (length direction X described later) of the first electric wire 60 is formed by cutting the coverings 62 and 63 over a predetermined range in the length direction X. The core wire portion 61 is exposed. One end of the first electric wire 60 in the length direction X is connected to a terminal device (not shown), and the other end of the first electric wire 60 in the length direction X is connected to a power source such as a battery (not shown). Has been.

  In the case of the first embodiment, the branch line constitutes the second electric wire 70. Similarly, the second electric wire 70 is a thick covered electric wire, and includes a core wire portion 71 in which a plurality of metal strands 76 are twisted together and an insulating resin coating 72 that covers the outer periphery of the core wire portion 71. One end of the second electric wire 70 in the length direction X is connected to a terminal device (not shown). As shown in FIG. 1, the other end portion (terminal portion 74) of the second electric wire 70 in the length direction X is cut off over a predetermined range in the length direction X so that the core wire portion 71 is formed. Exposed.

  As shown in FIG. 1, the length directions of the first electric wire 60 and the second electric wire 70 face the same direction, and this length direction is referred to as “length direction X”. In addition, a direction orthogonal to the length direction of each of the first electric wire 60 and the second electric wire 70 is referred to as a “direction Y orthogonal to the length direction”.

  The terminal fitting 10 is formed by punching a conductive metal plate into a predetermined shape and then bending it, and includes a flat terminal body 11 (connection region). As shown in FIG. 4, the terminal body 11 has a pair of short-side end portions 12 along the length direction X and a pair of long-side sides along the direction Y orthogonal to the length direction. End portions 13 and 14.

  The terminal body 11 has a first support surface 15 on which the first electric wire 60 is placed along the length direction X, and a second electric wire 70 in the length direction X on the upper surface (the plate surface on the near side in FIG. 4). And a second support surface 16 placed along the surface. The first support surface 15 and the second support surface 16 are arranged in parallel to each other along the direction Y orthogonal to the length direction.

  The terminal body 11 has a rib 17 extending in a direction Y orthogonal to the length direction at a substantially central portion in the length direction X between the first support surface 15 and the second support surface 16. The rib 17 has a shape that bulges in an embossed shape toward the upper surface side of the terminal body 11 (see FIGS. 5 and 6), and an end portion on one side in the direction Y orthogonal to the length direction is the first support surface 15. And the other end portion in the direction Y orthogonal to the length direction faces the second support surface 16.

  As shown in FIG. 4, the terminal fitting 10 protrudes from the end 13 on one side in the length direction X of the terminal body 11 to one side in the length direction X on one side in the direction Y orthogonal to the length direction. The second connection projecting from the other end 14 of the length direction X in the terminal body 11 to the other side of the length direction X on the other side of the first connection region 18 and the direction Y orthogonal to the length direction. And an area 19. That is, the first connection region 18 and the second connection region 19 protrude through the terminal body 11 to the opposite sides with respect to the length direction X, and are shifted (displaced) with respect to the direction Y orthogonal to the length direction. Has been placed.

  The first connection region 18 has a first base portion 21 on the bottom surface side, and the first base portion 21 has a first pressure-bonding surface 22 that continues from the first support surface 15. As shown in FIG. 4, the first connection region 18 has a first insulation barrel portion 23 at the outermost end portion (projecting tip portion) on one side in the length direction X, and the first connection region 18 in the length direction X is first. A first wire barrel portion 24 is provided between the insulation barrel portion 23 and the terminal body 11.

  At the edge of the first connection region 18, the width dimension (dimension in the direction Y perpendicular to the length direction) is gradually increased from the end 13 on one side of the length direction X in the terminal body 11 to the first wire barrel part 24. The 1st inclination edge 25 inclined with respect to the length direction X is provided so that it may become small.

  The 1st wire barrel part 24 is crimped | bonded and connected so that the core wire part 61 in the intermediate part 64 of the 1st electric wire 60 may be crimped. As shown in FIG. 6, the first wire barrel portion 24 is substantially U-shaped in a front view before being deformed, and is upward from both sides in the width direction (direction Y orthogonal to the length direction) of the first base portion 21. A pair of open barrel-shaped first wire barrel pieces 26 projecting are provided. As shown in FIG. 4, the first wire barrel portion 24 extends in the circumferential direction from the first pressure-bonding surface 22 to the inner surfaces (opposing surfaces) of the first wire barrel pieces 26, and many first wire barrel portions 24 are arranged in the length direction X. It has the 1st concave strip 27 (serration groove) arranged. The first connection region 18 has a pair of first side plate portions 28 that gradually rise from the first base portion 21 from the terminal body 11 side to the first wire barrel piece 26 at both ends in the width direction of the first wire barrel portion 24. (See FIG. 5). Among these, the upper end of the first side plate portion 28 located on the other side is continuous with the first inclined edge 25.

  The 1st insulation barrel part 23 is crimped | bonded and crimped | bonded so that the coating 62 which adjoins the core wire part 61 in the intermediate part 64 of the 1st electric wire 60 on the one side of the length direction X may be crimped. As shown in FIG. 6, the first insulation barrel portion 23 has a substantially U-shape in a front view before being deformed, and a pair of open barrel-like insulations protruding upward from both sides in the width direction of the first base portion 21. A ration barrel piece 29. The two insulation barrel pieces 29 are arranged at the same position in the length direction X, have a smaller projecting dimension than the first wire barrel piece 26, and have a length direction X dimension than the first wire barrel piece 26, respectively. It is sufficiently small (see FIG. 5). As shown in FIG. 4, the first pressure-bonding surface 22 of the first insulation barrel portion 23 and the inner surface (opposing surface) of the first insulation barrel portion 23 are arranged substantially without unevenness, and are formed on the first recess 27. There is no equivalent. The first connection region 18 has connecting side plate portions 31 rising from the first base portion 21 at both ends in the width direction between the first insulation barrel portion 23 and the first wire barrel portion 24. The first insulation barrel portion 23 and the first wire barrel portion 24 are separated from each other in the length direction X by the dimension in the length direction X of the connection side plate portion 31.

  The second connection region 19 has a second base portion 32 on the bottom surface side, and the second base portion 32 has a second pressure-bonding surface 33 that continues from the second support surface 16. As shown in FIG. 4, the second connection region 19 has a second wire barrel portion 34 at the end portion 14 on the other side in the length direction X. The edge of the second connection region 19 is inclined with respect to the length direction X so that the width direction gradually decreases from the other end portion 14 of the length direction X of the terminal body 11 to the second wire barrel portion 34. The second inclined edge 35 is provided.

  The 2nd wire barrel part 34 is crimped | bonded and connected so that the core part 71 in the terminal part 74 of the 2nd electric wire 70 may be crimped. The second wire barrel portion 34 is substantially U-shaped when viewed from the back before being deformed, and protrudes upward from both sides in the width direction (direction perpendicular to the length direction) of the second base portion 32 as shown in FIG. A pair of second barrel barrels 36 having an open barrel shape. As shown in FIG. 4, the second wire barrel portion 34 extends in the circumferential direction from the second pressure-bonding surface 33 to the inner surfaces (opposing surfaces) of both the second wire barrel pieces 36, and many second wire barrel portions 34 are arranged in the length direction X. It has the 2nd concave strip 37 (serration groove) arrange | positioned. The second connection region 19 has a pair of second side plate portions 38 that gradually rise from the second base portion 32 from the terminal body 11 side to the second wire barrel piece 36 at both ends in the width direction of the second wire barrel portion 34. (See FIG. 5). Among these, the upper end of the second side plate portion 38 located on one side is continuous with the second inclined edge 35.

  The second wire barrel portion 34 has the same shape as the first wire barrel portion 24, and is substantially the same as the second wire barrel portion 34 in terms of width, protrusion, and the like. The second wire barrel portion 34 is located at the outermost end portion on the other side in the length direction X of the terminal fitting 10. The edge part of the 2nd wire barrel part 34 at the endmost side is arrange | positioned along the direction Y orthogonal to a length direction. The second wire barrel part 34 does not have an insulation barrel part like the first insulation barrel part 23. For this reason, the protrusion dimension to the one side of the 2nd connection area | region 19 is smaller than the protrusion dimension to the other side of the 1st connection area | region 18, since it does not have an insulation barrel part.

Next, operations and effects of the first embodiment will be described.
When connecting the first electric wire 60, the core wire portion 61 in the intermediate portion 64 of the first electric wire 60 is placed on the first crimping surface 22 of the first wire barrel portion 24 and the core wire in the intermediate portion 64 of the first electric wire 60. A coating 62 adjacent to the portion 61 on one side in the length direction X is placed on the first pressure-bonding surface 22 of the first insulation barrel portion 23, and the core wire portion 61 in the intermediate portion 64 of the first electric wire 60 is long. The covering 63 adjacent on the other side in the length direction X is placed on the first support surface 15 of the terminal body 11 along the length direction X. In this state, the core wire portion 61 of the first electric wire 60 is crimped and connected to the first wire barrel portion 24 by a crimping jig made of an anvil and a crimper (not shown), and the covering 62 of the first electric wire 60 is the first wire 60. It is crimped and connected to the insulation barrel portion 23 (see FIG. 1).

  As shown in FIG. 2, both the first wire barrel pieces 26 of the first wire barrel portion 24 are deformed so as to wind the core wire portions 61 of the first electric wires 60 from both sides in the width direction, Position the protruding end. Further, as shown in FIG. 3, both the insulation barrel pieces 29 of the first insulation barrel portion 23 are deformed into a substantially circular shape substantially along the outer periphery of the covering 62 of the first electric wire 60, and at the central portion in the width direction. The projecting ends of each other are abutted. Before and after the crimping operation of the first electric wire 60, the state where the covering 63 of the first electric wire 60 is placed on the first support surface 15 of the terminal body 11 is maintained. As shown in FIG. 1, the covering 63 of the first electric wire 60 is in contact with the end portion on one side of the rib 17, and the displacement of the terminal body 11 toward the other side is restricted. Thus, the first electric wire 60 is connected to the terminal fitting 10 and fixed.

  When connecting the second electric wire 70, the core wire portion 71 in the terminal portion 74 of the second electric wire 70 is placed on the second crimping surface 33 of the second wire barrel portion 34 and the core wire in the terminal portion 74 of the second electric wire 70. A coating 72 adjacent to the portion 71 on one side in the length direction X is placed on the second support surface 16 of the terminal body 11 along the length direction X. In this state, the core wire portion 71 of the second electric wire 70 is crimped and connected to the second wire barrel portion 34 by a crimping jig composed of an anvil and a crimper (not shown). The crimping form of the core wire part 71 of the second electric wire 70 is the same as the crimping form of the core wire part 61 of the first electric wire 60 shown in FIG. 2, and is as described above. Before and after the crimping operation of the second electric wire 70, the covering 72 of the second electric wire 70 is maintained in the state of being placed on the second support surface 16 of the terminal body 11. Here, the coating 72 of the second electric wire 70 is in contact with the other end portion of the rib 17, and displacement of the terminal main body 11 toward one side is restricted. Thus, the second electric wire 70 is connected to the terminal fitting 10 and fixed.

  When the first electric wire 60 drawn out from the terminal fitting 10 is vibrated or pulled at the time of assembling or using the vehicle, the first electric wire 60 is connected to the core wire portion 61 and the first wire barrel portion 24. There is a concern that excessive stress is applied to the surface. The covering 63 of the first electric wire 60 is placed on the first support surface 15 of the terminal body 11 at a position opposite to the first insulation barrel section 23 with the first wire barrel section 24 interposed therebetween. Therefore, the influence of vibration and tension is less likely to be transmitted to the connection portion between the core wire portion 61 and the first wire barrel portion 24. As a result, the connection state between the core wire portion 61 of the first electric wire 60 and the first wire barrel portion 24 is properly maintained, and connection reliability can be ensured.

  Further, when the second electric wire 70 drawn out from the terminal fitting 10 is vibrated or pulled, stress is applied to the connection portion between the core wire portion 71 and the second wire barrel portion 34 in the second electric wire 70. Since the covering 72 of the second electric wire 70 is placed on the second support surface 16 of the terminal body 11 and supported by the terminal body 11 on the terminal portion 74 side, the influence of vibration and pulling is affected by the core wire portion 71 and the second wire 72. It becomes difficult to be transmitted to the connecting portion with the wire barrel portion 34. As a result, the connection state between the core wire portion 71 of the second electric wire 70 and the second wire barrel portion 34 is also appropriately maintained, and the connection reliability of the terminal fitting 10 as a whole can be ensured. And as a result that the 2nd connection field 19 does not have what corresponds to an insulation barrel part, and a projection size is controlled compared with the 1st connection field 18, it can avoid the enlargement of terminal fitting 10, The structure of the terminal fitting 10 can be simplified.

  Furthermore, since the ribs 17 are provided on the terminal body 11, the terminal body 11 can be prevented from being deformed even when the width dimension in the length direction X of the terminal body 11 is set large. The strength of the can be ensured.

<Other embodiments>
Other embodiments will be briefly described below.
(1) The terminal fitting may have a third connection region or a further connection region. In this case, if the core wire portion is exposed at the intermediate portion (the middle portion in the length direction) of the third electric wire, the wire barrel portion for crimping the core wire portion and the insulation barrel portion for crimping the coating are provided. Good.
(2) If necessary, the second connection region may also have an insulation barrel portion that crimps and connects the covering of the second covered electric wire.
(3) The 1st connection field and the 2nd connection field may be arranged without spacing substantially in the direction which intersects perpendicularly with each length direction of the 1st electric wire and the 2nd electric wire. In this case, the rib may be omitted from the terminal body, and the first support surface and the second support surface may be arranged continuously with each other.
(4) The first support surface and the second support surface may be arranged along a direction intersecting with each other in the terminal body (connection region).
(5) A plurality of ribs may be provided in the terminal body (connection region).

10 ... Terminal fitting 11 ... Terminal body (connection area)
DESCRIPTION OF SYMBOLS 15 ... 1st support surface 16 ... 2nd support surface 17 ... Rib 18 ... 1st connection area 19 ... 2nd connection area 23 ... 1st insulation barrel part 24 ... 1st wire barrel part 34 ... 2nd wire barrel part 60 ... 1st electric wire 61 ... Core wire part 62, 63 of 1st electric wire 70 ... Cover of 1st electric wire 70 ... 2nd electric wire 71 ... Core wire part of 2nd electric wire 72 ... Cover of 2nd electric wire

Claims (4)

A terminal fitting to which the first electric wire and the second electric wire are connected,
A first wire barrel part that is crimped and connected to a core part that is exposed by removing the coating in the middle of the length of the first electric wire, and is crimped to the coating of the first electric wire side by side with the first wire barrel part A first connection region having a first insulation barrel connected to each other;
A second connection region having a second wire barrel portion connected to the first connection region via a connection region, and being crimped and connected to a core wire portion exposed by removing a coating at a terminal portion of the second electric wire; A terminal fitting comprising   The terminal fitting according to claim 1, wherein a rib is protruded from the connection region.   The said connection area | region has the 1st support surface in which the coating | cover of the said 1st electric wire is mounted, and the 2nd support surface in which the coating | cover of the said 2nd electric wire is mounted. The terminal fitting described in 1. The first connection region and the second connection region are disposed so as to protrude opposite to each other through the connection region,
The 1 insulation barrel portion is an outermost end portion on one side of the first connection region that is opposite to the first support surface across the first wire barrel portion with respect to the length direction of the first electric wire. Installed in
The terminal fitting according to claim 3, wherein the second wire barrel portion is installed at an outermost end portion on the other side of the second connection region with respect to the length direction of the second electric wire.

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