JP2021061668A - Terminal structure of wire harness - Google Patents

Abstract

To provide a terminal structure of a wire harness which can further prevent assembly defects when the wire harness is mounted on a vehicle.SOLUTION: A terminal structure 1 of the wire harness comprises: a wire harness 5; an inner holder 6 in which wire insertion holes 64a, 64b are formed; and a metal shield shell 7 which holds the inner holder 6 movably and grounds a braided wire 4 to a metal housing. The inner holder 6 is provided with a wire mount piece 65 extending from an end of one wire insertion hole 64a. The wire mount piece 65 and an electric wire 2a along which the wire mount piece 65 is placed are fixed by a tape 9, and an electric wire 2b led out from the other wire insertion hole 64b is movable with respect to the inner holder 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a terminal structure of a wire harness having a plurality of electric wires and braided wires.

Conventionally, a wire harness has been mounted on an automobile. FIG. 5 is a perspective view showing a terminal structure of a conventional wire harness (see Patent Document 1).

The vehicle body panel 311 shown in FIG. 5 is provided with a terminal block 313 provided with terminal connection portions 315 and 317. The wire harness 319 has two electric wires 321 and 323 and a shield member (for example, a braided wire) (not shown) that covers them. Terminals 325 and 327 connected to terminal connection portions 315 and 317 of the terminal block 313 are crimped to the terminals of the electric wires 321 and 323. The wire harness 319 is fixed to the vehicle body panel 311 via the shield shell 329 and the inner holder 331 in the vicinity of the terminal block 313. Further, the shield member is grounded to the vehicle body panel 311 via the shield shell 329.

The shield shell 329 is made of metal and is formed in a tubular shape. Further, the shield shell 329 has a support piece 341 fastened to a stud bolt 339 protruding from the vehicle body panel 311. The inner holder 331 is formed with an electric wire insertion hole 347 through which the electric wires 321 and 323 are inserted, and an electric wire mounting piece 351 extending from the electric wire insertion hole 347. The electric wires 321 and 323 are fixed to the inner holder 331 by winding the tape 348 on the electric wire mounting piece 351.

As shown in FIG. 6, the inner holder 331 is provided with a lance 357 that locks the lance locking portion 363 of the shield shell 329. The inner holder 331 is inserted inside the shield shell 329, and the lance 357 is locked to the lance locking portion 363, so that the inner holder 331 is restricted from being detached from the shield shell 329. Further, the inner holder 331 is held by the shield shell 329 so as to be movable a predetermined distance D2 in the axial direction of the electric wire insertion hole 347.

In the prior art of the above configuration, since the electric wires 321 and 323 are fixed to the vehicle body panel 311 so as to be movable along with the inner holder 331 by the distance D2, the dimensional tolerance of the wire harness 319 is dimensionally different when the wire harness 319 is mounted on the vehicle. Also, it is possible to absorb the assembly tolerance of vehicle assembly parts (terminal block 313, etc.), and the wire harness 319 is improperly assembled (the lengths of the wires 321 and 323 are not enough, and the terminals 325 and 327 are connected to the terminal connection portion 315. , 317 cannot be connected, etc.) can be prevented.

Japanese Unexamined Patent Publication No. 2010-268563

In the prior art shown in FIGS. 5 and 6, all the electric wires 321 and 323 were collectively fixed to the electric wire mounting piece 351 of the inner holder 331. Therefore, when an independent dimensional tolerance is generated in the portion of each electric wire 321 and 323 from the electric wire mounting piece 351 to the terminal, the tolerance cannot be absorbed and the terminals 325 and 327 are connected to the terminal connection portions 315 and 317. There was a problem that it could be difficult to do.

As a solution to this problem, it is conceivable to design the portion of each electric wire 321 and 323 from the electric wire mounting piece 351 to the terminal to have an extra length in advance. However, there are cases where it is difficult to provide an extra length, for example, when a large-diameter, high-rigidity electric wire is used.

In order to solve the above problems, it is an object of the present invention to provide a terminal structure of a wire harness that can further prevent assembly defects when the wire harness is mounted on a vehicle.

The terminal structure of the wire harness of the present invention includes a wire harness having a plurality of electric wires and a braided wire that covers these electric wires from the outside and electromagnetically shields them, and an inner holder in which a plurality of electric wire insertion holes through which the electric wires are inserted are formed. The inner holder is provided with a metal shield shell that holds the inner holder and is fixed to the metal member to ground the braided wire to the metal member, and the inner holder can move a predetermined distance in the axial direction of the electric wire insertion hole. At least one of the electric wires is fixed to the inner holder by a fixing means, and at least one of the electric wires is movable with respect to the inner holder. It is characterized by.

According to the present invention, the dimensional tolerance of the electric wire fixed to the inner holder can be absorbed by moving the electric wire together with the inner holder, and the dimensional tolerance of other electric wires can be absorbed by moving the electric wire by itself. it can. Therefore, it is possible to further prevent poor assembly when the wire harness is mounted on the vehicle.

It is a top view which shows the terminal structure of the wire harness which concerns on one Embodiment of this invention. It is the figure which excluded the braided wire, the crimping sleeve, and tape in the terminal structure of the wire harness of FIG. It is a perspective view which shows the main part of the terminal structure of the wire harness of FIG. It is a side view of the terminal structure of the wire harness of FIG. It is a perspective view which shows the terminal structure of the conventional wire harness. It is sectional drawing for demonstrating the inner holder holding structure in the shield shell of FIG.

The "terminal structure of the wire harness" according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.

The terminal structure 1 of the wire harness shown in FIG. 1 includes a wire harness 5 mounted on an automobile, an inner holder 6, a metal shield shell 7, and a crimping sleeve 8.

The wire harness 5 has two electric wires 2a and 2b and a braided wire 4 (shown only in FIG. 1 and not shown in FIGS. 2 to 4) that covers the electric wires 2a and 2b from the outside and electromagnetically shields them. ing. The two electric wires 2a and 2b are coated electric wires having a circular cross section, and connectors 3a and 3b are attached to each of the terminals. These connectors 3a and 3b are connected to an in-vehicle device (not shown). The braided wire 4 is a well-known shield member in which a conductive wire is woven into a tubular shape.

The inner holder 6 is made of synthetic resin, and as shown in FIG. 4, the block-shaped holder main body 61, the protruding portion 62 protruding from one side surface 63 of the holder main body 61, and the holder main body It has an electric wire mounting piece 65 projecting from the other side surface of the 61. The protruding portion 62 is formed to be smaller in width and height than the holder main body portion 61.

The holder main body 61 and the protruding portion 62 of the inner holder 6 are formed with an electric wire insertion hole 64a through which the electric wire 2a is inserted and an electric wire insertion hole 64b through which the electric wire 2b is inserted. The electric wire insertion holes 64a and 64b extend in the alignment direction of the holder main body portion 61 and the protruding portion 62. Although not shown, the holder body 61 is provided with a lance that locks to the metal shield shell 7 as in the conventional product shown in FIG.

As shown in FIGS. 2 and 3, the electric wire mounting piece 65 extends from the end of one of the two electric wire insertion holes 64a and 64b to the side opposite to the protruding portion 62. In this example, the wire mounting piece 65 is not provided on the other wire insertion hole 64b side. The electric wire mounting piece 65 is formed in a gutter shape (partially cylindrical shape) in which a cylinder is cut in the axial direction thereof, and is along the electric wire 2a led out from the electric wire insertion hole 64a. The electric wire mounting piece 65 and the electric wire 2a are fixed by winding a tape 9 (corresponding to the "fixing member" of the claim). The electric wire mounting piece 65 and the tape 9 correspond to the "fixing means" of the claim. Further, the electric wire 2b derived from the other electric wire insertion hole 64b is movable with respect to the inner holder 6 in the longitudinal direction of the electric wire 2b.

The metal shield shell 7 is connected to one end of the shell main body 71 formed in a square cylinder shape and one end of the shell main body 71, and is connected to the small diameter portion 72 formed in an elliptical cylinder shape and the other end of the shell main body 71. It has a fixed piece 74 and.

Although not shown, the shell main body 71 is provided with a lance locking portion for locking the lance of the inner holder 6 described above, as in the conventional product shown in FIG. The small diameter portion 72 is formed to have a smaller diameter than the shell main body portion 71. As shown in FIG. 4, a step portion 73 is formed at the boundary between the shell main body portion 71 and the small diameter portion 72.

The fixing piece 74 is formed with a bolt insertion hole 75 through which a bolt (not shown) is inserted. In this example, the fixing piece 74 is superposed on the metal housing of the in-vehicle device (corresponding to the "metal member" of the claim), and is made of the metal by the bolt and the nut 10 inserted into the bolt insertion hole 75. It is fixed to the housing.

The inner holder 6 is inserted inside the metal shield shell 7, and the above-mentioned lance is locked to the lance locking portion, so that the inner holder 6 is restricted from being separated from the metal shield shell 7. Further, as shown in FIG. 4, the inner holder 6 is held by the metal shield shell 7 so as to be movable a predetermined distance D1 in the axial direction of the electric wire insertion holes 64a and 64b. That is, in FIG. 4, the step portion 73 of the metal shield shell 7 and the surface 63 of the inner holder 6 are separated by a distance D1. From this state, the inner holder 6 can move until the surface 63 comes into contact with the step portion 73.

The crimping sleeve 8 is made of metal and is formed in an elliptical cylinder shape that is one size larger than the small diameter portion 72 of the metal shield shell 7. The crimping sleeve 8 is crimped (pressurized so as to reduce the diameter) with the end portion of the braided wire 4 sandwiched between the crimping sleeve 8 and the small diameter portion 72, and fixes the braided wire 4.

The terminal portion of the wire harness 5 is fixed to the metal housing of the in-vehicle device via the metal shield shell 7 and the inner holder 6. Further, the braided wire 4 is grounded to the metal housing via the metal shield shell 7. Further, the electric wires 2a and 2b derived from the electric wire insertion holes 64a and 64b are connected to the in-vehicle device via the connectors 3a and 3b.

When assembling the wire harness 5 to the vehicle, usually, the wire harness 5 is arranged on the vehicle body, the fixing piece 74 is fixed to the metal housing of the in-vehicle device, and then the connectors 3a and 3b are connected. At this time, since the position of the metal shield shell 7 with respect to the wire harness 5 is roughly determined by fixing the electric wire 2a and the inner holder 6 with the tape 9 in advance, the fixing piece 74 is placed at the mounting position of the metal housing. The work of aligning can be easily performed.

Further, when an independent dimensional tolerance (deviation of the electric wire length within the tolerance range) occurs in the terminal portion of the electric wire 2a fixed to the electric wire mounting piece 64a, the electric wire 2a moves together with the inner holder 6 to obtain the dimensions. Since the tolerance can be absorbed, the connector 3a can be connected to the mating connector on the in-vehicle device side without any trouble. Further, when an independent dimensional tolerance is generated in the terminal portion of the other electric wire 2b, the dimensional tolerance can be absorbed by moving the electric wire 2b by itself, so that the connector 3b can be used as the mating connector on the in-vehicle device side without any trouble. You can connect. That is, the independent dimensional tolerances of the terminal portions of the electric wires 2a and 2b can be absorbed for each electric wire 2a and 2b.

According to the terminal structure 1 of the wire harness described above, it is possible to further prevent the assembly failure when the wire harness 5 is mounted on the vehicle as compared with the conventional product. Further, this structure is particularly effective when a large-diameter, high-rigidity electric wire (that is, a thick electric wire whose terminal portion of the electric wire is difficult to have an extra length) is used.

In the above-described embodiment, the wire mounting piece 65 is provided only on the one wire insertion hole 64a side, but in the present invention, the wire mounting piece 65 extends from both wire insertion holes 64a and 64b, respectively. It may have been done. In that case, one electric wire mounting piece 65 and the electric wire along which the electric wire mounting piece 65 is placed are fixed by a fixing member, and the other electric wire mounting piece 65 and the electric wire along which the electric wire mounting piece 65 is placed are attached. Is not fixed.

In the above-described embodiment, the inner holder 6 is formed with two electric wire insertion holes 64a and 64b, but in the present invention, the inner holder may be formed with three or more electric wire insertion holes. For example, three electric wire insertion holes are formed in the inner holder, and electric wire mounting pieces are extended from two of them, and each electric wire mounting piece and each electric wire are fixed to each other, and the other one. The present invention also includes an electric wire that is movable with respect to the inner holder.

Further, in the present invention, at least one of the electric wires led out from the electric wire insertion hole may be fixed to the inner holder, and the means for fixing the electric wire is not limited to the electric wire mounting piece 65 and the tape 9 described above. For example, the electric wire may be fixed to one of the electric wire insertion holes instead of the electric wire mounting piece.

It should be noted that the above-described embodiment merely shows a typical embodiment of the present invention, and the present invention is not limited to this embodiment. That is, it can be modified in various ways without departing from the gist of the present invention. As long as the configuration of the present invention is still provided by such modification, it is, of course, included in the category of the present invention.

1 Wire harness terminal structure 2a, 2b Electric wire 4 Braided wire 5 Wire harness 6 Inner holder 7 Metal shield shell 9 Tape (fixing member, fixing means)
64a, 64b Electric wire insertion hole 65 Electric wire mounting piece (fixing means)

Claims (4)

A wire harness having a plurality of electric wires and a braided wire that covers these electric wires from the outside and electromagnetically shields them.
An inner holder having a plurality of electric wire insertion holes through which the electric wire is inserted, and an inner holder.
A metal shield shell that holds the inner holder and is fixed to the metal member to ground the braided wire to the metal member.
The inner holder is held by the metal shield shell so as to be movable a predetermined distance in the axial direction of the electric wire insertion hole.
A terminal structure of a wire harness, characterized in that at least one of the electric wires is fixed to the inner holder by a fixing means, and at least one of the electric wires is movable with respect to the inner holder. The inner holder is provided with an electric wire mounting piece extending from at least one end of the plurality of electric wire insertion holes and along the electric wire led out from the electric wire insertion hole.
The terminal structure of a wire harness according to claim 1, wherein at least one wire mounting piece and the wire along which the wire mounting piece is placed are fixed by a fixing member. Two electric wire insertion holes are formed in the inner holder.
The wire mounting piece extends from the end of only one of the two wire insertion holes, and the wire mounting piece and the wire along which the wire mounting piece is placed are fixed by the fixing member. Cable,
The terminal structure of a wire harness according to claim 2, wherein the electric wire led out from the other of the two electric wire insertion holes is movable with respect to the inner holder. The terminal structure of a wire harness according to any one of claims 1 to 3, wherein a connector is attached to each of the terminals of the electric wire derived from the plurality of electric wire insertion holes.

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