JP2016192347A - Terminal, electric wire with terminal and wiring harness structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal or the like having both sufficient contact resistance and tensile strength.SOLUTION: A terminal 1 is made of copper, for example, and comprises a terminal body 3 and a crimp part 5. The terminal body 3 is configured by forming a tabular material of a predetermined shape into a cylindrical body of which the cross section is rectangular. The terminal body 3 includes insides an elastic contact piece 11 that is formed by folding a tabular material within a rectangular cylindrical body. A male terminal or the like is inserted into the terminal body 3 from a front end portion. The crimp part 5 is formed from an open barrel type crimp part 7 that crimps a distal end side of a lead wire part of a coated lead wire and a tubular crimp part 9 that crimps a coating part and a part of the lead wire exposed from the coating part. Namely, the open barrel type crimp part 7 is formed at a side of the terminal body 3, and the tubular crimp part 9 is provided at an end side of the terminal 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric wire with a terminal used for an automobile or the like.

  Conventionally, the connection between an electric wire and a terminal in an automotive wire harness is generally a crimp bonding in which the electric wire is crimped by a terminal called an open barrel type. Such an open barrel type terminal has a caulking portion of a conductor and a caulking portion of a covering portion (for example, Patent Document 1).

JP 2009-289558 A

  The open barrel type crimp terminal of Patent Document 1 secures contact resistance and tensile strength by changing the crimping strength of the conductor crimping portion depending on the part. For example, sufficient tensile strength for the covering portion It was difficult to ensure. For example, in the open barrel type crimp terminal, the end portion in the width direction of the crimp portion is wound inside. For this reason, in the open barrel type crimp terminal, if the crimping strength is increased, the conductor wire is cut and the covering portion is broken, so that there is an upper limit in the crimping strength, and it is difficult to ensure sufficient tensile strength.

  The present invention has been made in view of such problems, and an object thereof is to provide a terminal or the like having both sufficient contact resistance and tensile strength.

  In order to achieve the above-described object, a first invention is a terminal connected to a coated conductor, and includes a crimping portion to which the coated conductor is crimped, and a terminal main body, and the crimping portion includes the coated conductor. A first crimping portion for crimping a part of the leading end side of the conducting wire exposed from the covering portion, and a second crimping portion for crimping the covering portion and a part of the conducting wire exposed from the covering portion. The terminal is characterized in that the first crimping part is an open barrel type, and the second crimping part is tubular.

  According to the first aspect of the present invention, the contact resistance between the lead wire and the terminal is good because the leading end portion of the lead wire is crimped by the open barrel-type crimping portion. In addition, since the boundary between the covering portion and the conducting wire is crimped together by the tubular crimping portion, the covering portion and the conducting wire are crimped together. High tensile strength can be ensured. At this time, in the tubular crimping portion, the coating is crimped from the entire circumferential direction, so that the coating portion is not easily broken, and the conducting wires are compressed together and are not easily broken. For this reason, the connection state of a covering conducting wire and a terminal with high connection reliability can be obtained.

  A second invention is an electric wire with a terminal in which a coated conductor and a terminal are connected, wherein the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body, and the crimping portion is open. A barrel-type first crimping portion and a tubular second crimping portion, and the first crimping portion causes a portion of the leading end side of the conducting wire exposed from the coating portion of the coated conducting wire to The terminal-attached electric wire, wherein the covering portion and a part of the conductive wire exposed from the covering portion are crimped by the second crimping portion.

  According to 2nd invention, while ensuring sufficient contact resistance, the electric wire with a terminal which can ensure sufficient tensile strength can be obtained.

  A third invention is a wire harness structure in which a plurality of electric wires with terminals according to the second invention are bundled.

  In the present invention, a plurality of electric wires with terminals can be bundled and used.

  According to the present invention, it is possible to provide a terminal having both sufficient contact resistance and tensile strength.

(A) is a perspective view of the terminal 1, (b) is a longitudinal sectional view of the terminal 1. (A) is a perspective view of the state which inserted the covered conducting wire 13 to the terminal 1, (b) is a longitudinal cross-sectional view of the state. (A) is a perspective view of the electric wire 10 with a terminal, (b) is longitudinal direction sectional drawing of the electric wire 10 with a terminal. (A) is a figure which shows the shape of the crimping | compression-bonding part in the AA line cross section of FIG.3 (b), (b) is a figure which shows the shape of the crimping | compression-bonding part in the BB line cross section of FIG.3 (b), (c) ) Is a diagram showing the shape of the crimping part in the section taken along the line CC in FIG.

  FIG. 1A is a perspective view showing a terminal 1 according to the present invention, and FIG. 1B is a longitudinal sectional view of the terminal 1.

  The terminal 1 is made of, for example, copper and includes a terminal main body 3 and a crimping portion 5. The terminal body 3 is formed by forming a plate-shaped material having a predetermined shape into a cylindrical body having a rectangular cross section. The terminal body 3 has an elastic contact piece 11 formed by folding a plate-like material into a rectangular cylinder. The terminal body 3 is connected by inserting a male terminal or the like from the front end.

  The crimping part 5 includes an open barrel-type crimping part 7 that crimps the leading end side of the conductor part of the coated conductor, and a tubular crimping part 9 that crimps a part of the conductor exposed from the covering part and the covering part. That is, the open barrel type crimping part 7 is formed on the terminal body 3 side, and the tubular crimping part 9 is provided on the end part side of the terminal 1.

  The open barrel type crimping part 7 as the first crimping part has the same form as the wire barrel in the conventional open barrel type crimping part. That is, a pair of tongue pieces are provided so that the cross section opens upward in a substantially U shape, and the upper end edges thereof are crimped so as to be folded toward the center side.

  In addition, it is desirable to provide a groove, for example, in the circumferential direction on the inner surface of the open barrel crimping portion 7. By forming the groove in this way, when the conducting wire 15 is crimped, the oxide film on the surface of the conducting wire 15 can be easily broken, and the contact area with the conducting wire 15 can be increased.

  The tubular crimping part 9 as the second crimping part is obtained by rounding the plate-like material so that it has a circular cross section, but the side edges of the plate-like material are butted or overlapped and joined together. It is formed by doing. A covered conducting wire is inserted from the rear end portion of the tubular crimp portion 9 formed in a cylindrical shape. In addition, joining of a butt | matching part is performed by laser welding etc., for example.

  As described above, the tubular crimping part 9 is a part that collectively crimps the tip of the covering part of the covered conductor and a part of the conductor exposed from the covering part. For this reason, the diameter of the front side (open barrel type crimping part 7 side) of the tubular crimping part 9 to which the conducting wire is crimped is reduced (reduced diameter part 9a), and the rear side of the tubular crimping part 9 to which the covering part is crimped is enlarged. (Expanded diameter portion 9b). That is, the diameter of the tubular crimping portion 9 is different between the front end side and the rear end side.

  A groove may be formed on the inner surface of the reduced diameter portion 9a to which the conducting wire 15 is crimped, as in the open barrel crimping portion 7. Moreover, you may form the convex part which follows the circumferential direction in the inner surface of the enlarged diameter part 9b to which the coating | coated part 17 is crimped | bonded.

  Next, the process for manufacturing the electric wire with terminal will be described. FIG. 2A is a perspective view showing a state in which the covered conductor 13 is inserted into the terminal 1, and FIG. 2B is a longitudinal sectional view of the terminal 1.

  First, the covering portion 17 having a predetermined length at the tip of the covered conducting wire 13 is removed to expose the conducting wire 15. Next, the covered conducting wire 13 is inserted from the rear end of the tubular tubular crimp portion 9. As described above, the diameter-reduced portion 9 a having a small diameter is provided on the distal end side of the tubular crimp portion 9. For this reason, the amount of insertion of the covered conductor 13 can be made constant by inserting the covered conductor 13 until the covered portion 17 of the covered conductor 13 comes into contact with the reduced diameter portion 9a, and positioning of the covered conductor 13 with respect to the terminal 1 can be performed. Made.

  When a predetermined amount of the covered conducting wire 13 is inserted, a part of the conducting wire 15 exposed from the covering portion 17 of the covering conducting wire 13 is located in the reduced diameter portion 9a of the tubular crimping portion 9 and the tip of the conducting wire 15 protruding from the tubular crimping portion 9 The part is located in the open barrel type crimping part 7.

  FIG. 3A is a perspective view of a state where the crimping portion 5 is crimped from this state, and FIG. 3B is a cross-sectional view in the longitudinal direction of the terminal 1 in this state. The crimping | compression-bonding of the crimping | compression-bonding part 5 is performed by a metal mold | die, for example. At this time, the open barrel crimping portion 7 and the tubular crimping portion 9 can be crimped at a time. Note that the mold may be one in which the tubular crimping portion 9 described above can be welded before crimping.

  4A is a cross-sectional view taken along line AA in FIG. 3B, FIG. 4B is a cross-sectional view taken along line BB in FIG. 3B, and FIG. FIG. 4 is a cross-sectional view taken along the line CC of FIG. When the open barrel-type crimping portion 7 is crimped, the upper end edges of the tongue pieces abut against each other and are deformed so as to be wound in the center direction of the conducting wire 15. By crimping in this way, a sufficient contact area between the conducting wire 15 and the open barrel crimping portion 7 is ensured, and the contact resistance is improved.

  On the other hand, as described above, the tubular crimping portion 9 has the conducting wire 15 and the covering portion 17 crimped together. As shown in FIG. 4B, when the conducting wire 15 is crimped by the tubular crimping portion 9, the tubular crimping portion 9 (the reduced diameter portion 9a) is crushed so that the cross section becomes a flat shape, Conductive wire 15 is conducted.

  Further, as shown in FIG. 4C, the covering portion 17 presses the covering portion 17 as a whole while substantially maintaining the circular cross section of the enlarged diameter portion 9 b of the tubular crimping portion 9. As described above, the single tubular crimping portion 9 collectively crimps both the covering portion 17 and the conducting wire 15, thereby providing a stronger tensile force than the case where the covering portion 17 and the conducting wire 15 are separately crimped. Strength can be secured. In particular, since the covering portion 17 is crimped to the tubular shape from the entire circumference, the covering portion 17 is not torn.

  As described above, according to the present embodiment, the tip of the conducting wire 15 is crimped by the open barrel crimping portion 7, and, for example, compared with the case where the entire crimping portion 9 is crimped, the terminal 1 and The contact area with the conducting wire 15 is increased, and good contact resistance can be obtained.

  Further, since the covering portion 17 and a part of the conductive wire 15 are crimped by the same tubular crimping portion 9, the covering portion 17 is broken compared to the case where the covering portion 17 is crimped by an open barrel type crimping portion. It is hard to occur and sufficient tensile strength can be obtained.

  Moreover, since the open barrel type crimping part 7 and the tubular crimping part 9 are used in combination, the contact area between the conductor 15 and the terminal 1 can be increased, and the surface area is increased, so that the heat dissipation can be enhanced.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  In the above-described embodiment, the female terminal has been described. However, the male terminal can be used similarly. Further, a plurality of electric wires with terminals according to the present invention can be bundled and used. In the present invention, a structure in which a plurality of electric wires with terminals is bundled in this way is referred to as a wire harness structure.

DESCRIPTION OF SYMBOLS 1 ......... Terminal 3 ......... Terminal body 5 ......... Crimping part 7 ......... Open barrel type crimping part 9 ......... Tubular crimping part 10 ......... Wire with terminal 11 ......... Elastic contact piece 13 ... ... Coated wire 15 ... …… Conducted wire 17 ... …… Coating part

Claims (3)

A terminal connected to the coated conductor,
A crimping portion to which the coated conductor is crimped, and a terminal body;
The crimping part crimps the first crimping part that crimps a part of the leading end side of the conducting wire exposed from the covering part of the coated conducting wire, and the covering part and a part of the conducting wire exposed from the covering part. A second crimping part,
The terminal according to claim 1, wherein the first crimping portion is an open barrel type, and the second crimping portion is tubular. It is an electric wire with a terminal in which a coated conductor and a terminal are connected,
The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
The crimping portion has an open barrel-type first crimping portion and a tubular second crimping portion,
A part of the leading end side of the conductive wire exposed from the coating portion of the coated conductive wire is crimped by the first crimping portion, and the coating portion and the conductive wire exposed from the coating portion are exposed by the second crimping portion. A terminal-attached electric wire characterized by being partially crimped.   A wire harness structure in which a plurality of electric wires with terminals according to claim 2 are bundled.

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