JP6405982B2 - Cable holding member and cable having the cable holding member - Google Patents

Description

  The present invention relates to a cable holding member that holds a cable to be introduced into a casing through a cable introduction hole formed in a casing wall of an electric device, and a cable including the same.

  In the portion where the cable is drawn from the outside into the housing of the electric device, a structure is used in which the bushing is covered by molding between the housing wall and the cable. In such a structure, since the cable sheath and the molding material are different materials, they are not fused to each other even if they are heated and fused in the molding process. For this reason, the cable has low resistance to pulling force. Therefore, a technique is widely used in which a ring member is caulked and fixed to a cable, and the cable and the ring member are covered with a bushing formed by molding to increase resistance to a tensile force applied to the cable.

  In order to further increase the tensile strength, a structure is known in which a metal ring member provided with an opening is pressure-bonded to a cable. In this structure, since the molding material that has flowed into the opening of the ring member that is crimped to the cable serves as an anchor, it is possible to improve resistance to a tensile force applied to the cable (for example, Patent Document 1).

JP 2012-216775 A

  However, in the cable holding member having the above-described configuration, the amount of the molding material flowing into the opening decreases as the outer cover of the cable bites into the opening of the ring member crimped to the cable, and the tensile force applied to the cable is reduced. There was a problem that sufficient resistance could not be obtained.

  In view of the circumstances as described above, an object of the present invention is to provide a cable holding member capable of improving resistance to a tensile force applied to a cable and a cable using the same.

  In order to achieve the above object, a cable holding member according to an aspect of the present invention spreads in a flared shape as it is separated from a crimping portion to be crimped to an outer peripheral surface of a cable body and the wire length direction of the cable body from the crimping portion. A ring member having a skirt, and a bushing molded so as to cover the ring member and a part of the cable body in the vicinity thereof.

  In this cable holding member, by providing the flared hem portion on the ring member, the molding material for forming the bushing can be filled up to the back surface of the hem portion. Thereby, the frictional force between the bushing that receives the tensile force applied to the cable body and the ring member can be increased, and the strength against the tensile force can be increased.

A plurality of slits along the line length direction of the cable body may be provided in the skirt portion of the ring member.
By providing a plurality of slits along the line length direction of the cable body at the hem of the ring member, a flared hem can be formed without using a processing jig or the like. And a molding material for forming a bushing in a gap portion between the cable and the outer surface of the cable can be more reliably filled.

  By applying such a cable holding member to a cable or using the applied cable for an electronic device, a cable having high resistance to a tensile force can be configured.

  As described above, according to the present invention, it is possible to improve resistance to a tensile force applied to the cable in the cable holding member.

It is a figure which shows the cable holding member which concerns on the 1st Embodiment of this invention. It is a perspective view explaining the method to form a skirt part in a ring member using the jig for processing in the cable holding part structure concerning a 1st embodiment. It is a perspective view explaining the method of forming a skirt part in a ring member similarly using a processing jig. It is a perspective view which shows the state which crimped | bonded the ring member to the cable using the processing jig. It is a figure which shows the cable holding member which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the plate-shaped ring member before being crimped | bonded to a cable in the cable holding part structure which concerns on 2nd Embodiment. It is a perspective view which shows the bending process of the plate-shaped ring member of FIG. It is a perspective view which shows the state which crimped | bonded the ring member to which the bending process of FIG. 7 was crimped | bonded to the cable.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
[Cable holding member]
FIG. 1 is a view showing a cable holding member 50 and a cable body 20 according to the first embodiment of the present invention.

  The cable holding member 50 includes a cable body 20 inserted through a cable introduction hole 31 provided in the housing wall 30 of the electric device, and an outer periphery of the cable body 20 in the vicinity of the cable introduction hole 31 and outside the housing wall 30. The ring member 10 is crimped to the surface, and the bushing 40 molded so as to cover the ring member 10 and a part of the cable body 20 in the vicinity thereof.

The outer sheath of the cable main body 20 is removed from the vicinity of the cable introduction hole 31 of the cable main body 20 to the connection portion with the connector 32 in the electronic device, and the in-cable wiring member 21 is exposed. A groove 41 into which the housing wall 30 is fitted is formed on the outer peripheral surface of the bushing 40.
The cable body 20, the cable wiring member 21, the ring member 10, the connector 32, and the bushing 40 constitute a cable 60.

  The ring member 10 includes a crimping portion 11 that is crimped to the outer peripheral surface of the cable body 20 and a skirt portion 12 that spreads in a flared shape as the distance from the crimping portion 11 in the line length direction of the cable body 20 increases. The crimp part 11 and the skirt part 12 are formed side by side in the line length direction of the cable body 20. And the ring member 10 is crimped | bonded to the outer peripheral surface of the cable main body 20 with the crimping | compression-bonding part 11 facing the housing | casing wall 30 side of an electronic device, and the skirt part 12 facing the other side.

Next, a method for forming the flared skirt 12 on the ring member 10 will be described.
2, 3, and 4 are views for explaining a method of forming the flared hem portion 12 in the ring member 10.

  As shown in FIG. 2, there is a method of using a processing jig 50 as one method of forming the skirt portion 12 in the ring member 10. The processing jig 50 is a block in which a through hole 51 through which the cable body 20 passes is provided coaxially with respect to the truncated cone-shaped jig body.

  As the ring member 10, for example, a member obtained by processing a member such as a plate-shaped sheet metal into a C-shaped ring shape is used. The inner diameter of the ring member 10 may be about the middle between the diameter of the cable body 20 and the maximum outer diameter of the processing jig 50, for example.

  Before the crimping of the ring member 10 to the cable main body 20, as shown in FIG. 3, the processing is performed between the cable body 20 and the hem portion forming planned portion 12 </ b> A of the ring member 10 positioned on the planned crimping portion of the cable main body 20. The jig 50 is set.

  Next, the crimping part forming scheduled part 11A of the ring member 10 is crimped to the cable body 20 using a crimping tool. At this time, as shown in FIG. 4, the processing jig 50 is disposed between the skirt formation planned portion 12A of the ring member 10 and the cable body 20, so that the skirt formation planned portion 12A is processed. It is formed in a flare shape corresponding to the outer peripheral surface shape of the truncated cone shape of the tool 50. In this way, the crimping part 11 and the skirt part 12 of the ring member 10 are obtained.

  After the crimping of the ring member 10 is completed, the processing jig 50 is removed. Thereafter, the bushing 40 is formed so as to cover the ring member 10 and its periphery by molding. When the bushing 40 is molded, the molding material also flows into the gap between the back surface of the skirt 12 and the outer surface of the cable body 20. For this reason, the bushing 40 is formed so as to surround the skirt 12 of the ring member 10 from the front surface, the end surface, and the back surface.

  According to the cable holding member configured as described above, the bushing 40 is provided so as to surround the skirt 12 of the ring member 10 from the front surface, end surface, and back surface by providing the ring member 10 with the flared hem 12. Can be molded. Thereby, the frictional force between the bushing 40 receiving the tensile force applied to the cable body 20 and the ring member 10 can be increased, and a cable holding portion structure having high strength against the tensile force can be obtained.

<Modification 1>
Instead of the processing jig 50, a molding material block made of the same mold material as the bushing 40 and having a truncated cone shape similar to that of the processing jig 50 may be used.

  The molding material block remains between the skirt portion 12 of the ring member 10 and the cable body 20 even after the ring member 10 is crimped to the cable body 20, and the bushing 40 is molded as it is. At this time, the molding material block is melted by the heat at the time of molding, and is assimilated with the molding material supplied for molding the bushing 40 to be solidified or cured. At the time of molding, the flare shape of the skirt 12 is maintained by the filling pressure of the molding material in the mold. Therefore, the ring member 10 having the flared skirt 12 can also be obtained by this method.

<Second Embodiment>
FIG. 5 is a view showing the cable holding member 50 and the cable body 20 according to the second embodiment of the present invention.
A plurality of slits 113 along the line length direction of the cable body 20 are formed in the flared hem portion 112 of the ring member 110 of the cable holding member over the entire length of the hem portion 112 in the line length direction. By forming such a plurality of slits 113 in the skirt 112 of the ring member 110, the flared shape of the skirt 112 can be formed without using the processing jig 50 of the first embodiment or the mold material block of the modification. Can be obtained.

Next, the manufacturing method of the cable holding member 50 of this 2nd Embodiment is demonstrated.
FIG. 6 is a view showing the plate-shaped ring member 110 before being crimped to the cable body 20.
As shown in the figure, the plate-shaped ring member 110 includes a crimping portion forming scheduled portion 111A and a skirt portion forming scheduled portion 112A. A plurality of slits 113 are formed in the skirt formation planned portion 112 </ b> A of the plate-like ring member 110. Each slit 113 is formed linearly and in parallel with each other from the boundary line between the press-bonded portion forming scheduled portion 111 and the skirt forming planned portion 112A to one end of the skirt forming planned portion 112A in the plate-like ring member 110.

  The plate-like ring member 110 in which the plurality of slits 113 are formed in this way is, as shown in FIG. 7, predetermined by bending at the position of the boundary line between the crimping part forming planned part 111A and the skirt part forming scheduled part 112A. Can be bent to any angle.

  Subsequently, as shown in FIG. 8, the crimped portion forming scheduled portion 111 </ b> A of the plate-shaped ring member 110 that has been subjected to the bending process is crimped to the outer peripheral surface of the cable body 20. At this time, the width of each slit 113 provided in the hem portion formation planned portion 112 </ b> A of the ring member 110 is the same as the width of the butted portions 114 at both ends in the annular direction of the ring member 110, and the crimp portion formation planned portion 111 </ b> A The skirt formation scheduled portion 112A becomes a flare-shaped hem portion 112 by spreading away from the position of the boundary line with the portion formation planned portion 112A.

  Thereafter, the bushing 40 is formed so as to cover the ring member 110 and its periphery by molding. At this time, the molding material flows through the slits 113 and the butting portions 114 formed in the skirt portion 112 of the ring member 110, so that the molding material is reliably filled between the back surface of the skirt portion 112 and the outer surface of the cable body 20. Is done.

  As described above, according to the present embodiment, by providing the plurality of slits 113 in the skirt 112 of the ring member 110, the flared hem 112 can be formed without using the processing jig 50 or the molding material block. While being able to form, the mold material can be more reliably filled into the gap portion between the back surface of the bottom portion 112 and the outer surface of the cable body 20.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to embodiment mentioned above, In the range of the summary of this invention described in the claim, various deformation | transformation and change Is possible.

DESCRIPTION OF SYMBOLS 10,110 ... Ring member 11, 111 ... Crimp part 12, 112 ... Bottom part 20 ... Cable main body 40 ... Bushing 50 ... Processing jig 113 ... Slit

Claims (3)

A ring member having a crimping part to be crimped to the outer peripheral surface of the cable body and a skirt part that spreads in a flared shape as the cable body is separated from the crimping part in the wire length direction;
Possess a bushing which is molded so as to cover a portion of the cable body in the vicinity and the ring member,
A cable holding member in which a plurality of slits along the line length direction of the cable body are provided in the skirt portion of the ring member. The cable holding member according to claim 1,
A cable holding member filled with a molding material between the skirt and the cable body .   A cable comprising the cable body and the cable holding member according to claim 1.

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