JP2016081568A - Cable terminal structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable terminal structure which can easily attach a strain relief and a connector with simplified structures, and can improve fixing force between the strain relief and the connector.SOLUTION: A cable terminal structure comprises: a cable bundle 20 including a plurality of coaxial cables; a connector 11 to be attached to a terminal part of the cable bundle 20; and a strain relief 30A which fixes the terminal part of the cable bundle 20 to the connector 11. The strain relief 30A is formed of a shrinkage tube material, and the force to fix the terminal part of the cable bundle 20 by the strain relief 30A includes the shrinkage force of the strain relief 30A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable terminal structure.

  Patent Document 1 discloses a strain relief used for metal cables and optical fiber cables. This strain relief is provided along the cable on the rear end side of the connector in order to regulate the bending of the cable drawn from the connector terminal. The strain relief has an elastically movable rear end portion and a fixed portion fixed to the connector (enclosure) by friction.

JP 2011-159626 A

  For example, a strain relief as described in Patent Document 1 is provided on a connector attached to the end of the cable or optical cable. Since the strain relief has a higher bending rigidity than that of the cable, excessive bending of the cable due to external force is suppressed. However, in the case of the configuration described in Patent Document 1, for example, since the strain relief is fixed to the connector by friction, the surface of the fixing portion is corrugated, and there is a structure for tightening the fixing portion of the strain relief on the connector side. The structure of both the strain relief and the connector becomes complicated, such as being necessary. Also, the process of attaching the strain relief to the connector becomes complicated. Furthermore, since the fixing force between the strain relief and the connector depends on the frictional force, a sufficient fixing force may not be obtained.

  An object of the present invention is to provide a cable terminal structure that can simplify the structure of the strain relief and the connector and can easily attach them, and can further increase their fixing force.

  A cable terminal structure according to an embodiment of the present invention includes a cable including at least one of an electric wire and an optical fiber, a connector attached to the terminal part of the cable, and a strain relief that fixes the terminal part of the cable to the connector. The strain relief is made of a tubular shrink material, and the force with which the strain relief fixes the terminal portion includes the shrinkage force of the strain relief.

  According to the present invention, the structure of the strain relief and the connector can be simplified and the attachment thereof can be easily performed, and the fixing force thereof can be further increased.

FIG. 1 is a perspective view showing an appearance of a cable terminal structure according to an embodiment of the present invention. 2 is an enlarged perspective view showing one of a plurality of coaxial cables included in the cable bundle shown in FIG. FIG. 3 is a perspective view showing the appearance of the strain relief. FIG. 4 is a side sectional view schematically showing a configuration of a connection portion between the connector and the coaxial cable. FIG. 5 is a perspective view showing the appearance of the strain relief according to the first modification. FIG. 6 is a perspective view showing the appearance of the strain relief according to the second modification. FIG. 7 is a sectional side view showing a cable terminal structure according to the second embodiment of the present invention. FIG. 8 is a side sectional view showing a cable terminal structure according to the third embodiment of the present invention.

[Description of Embodiment of Present Invention]
First, the contents of the embodiments of the present invention will be listed and described. A cable terminal structure according to an embodiment of the present invention includes a cable including at least one of an electric wire and an optical fiber, a connector attached to the terminal part of the cable, and a strain relief that fixes the terminal part of the cable to the connector. The strain relief is made of a tubular shrink material, and the force with which the strain relief fixes the terminal portion includes the shrinkage force of the strain relief.

  In this cable terminal structure, the connector and the cable are fixed to each other by the force by which the strain relief contracts. Since the strain relief is made of a tube-shaped shrinking material, its structure is simple, and the connector does not require a mechanism for tightening the strain relief, and the structure can be simplified. Moreover, since it can fix to a connector only by shrinking a strain relief, these attachments can be performed simply. Furthermore, since the force for fixing the strain relief and the connector mainly depends on the contraction force of the strain relief, it is easy to ensure a sufficient fixing force. That is, according to said cable terminal structure, the structure of a strain relief and a connector can be simplified, these can be attached simply, and these fixing forces can be heightened further.

  In the cable terminal structure described above, the strain relief may include a second portion that is elastically bent in a direction intersecting the central axis direction of the cable, in addition to the first portion fixed to the connector. As described above, the strain relief that achieves the above-described effect can be easily realized by having two portions required for the strain relief function separately.

  The second portion of the strain relief may be formed by forming a first slit extending in the circumferential direction in a tubular shrinkable material. Thereby, since the strain relief is easily bent in the radial direction intersecting the first slit, the bending direction of the cable can be easily defined. Further, in this case, a plurality of slit sets each including two or more first slits formed side by side along the circumferential direction are formed at intervals in the central axis direction, and two or more second slits in the circumferential direction are formed. The positions of the portions between the slits may be alternately shifted by 90 ° in a plurality of slit sets. Thereby, since the strain relief is easily bent in a certain radial direction and a radial direction orthogonal to the direction, the bending direction of the cable can be easily regulated in two directions. Alternatively, in this case, a plurality of slit sets including two or more first slits formed side by side along the circumferential direction are formed at intervals in the central axis direction, and two or more second slits in the circumferential direction are formed. The positions of the portions between the slits may be equal to each other in the plurality of slit sets. Thereby, since the strain relief is easily bent only in a certain radial direction, the bending direction of the cable can be easily restricted to one direction.

  In addition, the second portion of the strain relief may be formed by forming a spiral second slit in a tubular shrinkable material. Thereby, since the strain relief is easily bent equally in all radial directions, a configuration in which the bending direction of the cable is not restricted to a specific direction can be easily realized.

  In the above cable terminal structure, the connector has a cable insertion portion including an insertion hole for inserting the cable and an outer peripheral surface surrounding the insertion hole, and the strain relief presses the outer peripheral surface of the cable insertion portion inward by contraction force. May be. As a result, the contraction force of the strain relief can be directly applied to a part of the connector, so that the structure for fixing the strain relief to the connector can be simplified and a strong fixing force can be easily secured.

  In the cable terminal structure described above, the strain relief may apply a contracting force to a fixed member that constitutes a part of the cable and is fixed to the connector. Thereby, the shrinkage force of the strain relief can be indirectly applied to a part of the connector, and the strain relief can be easily fixed to the connector. In this case, the cable has a transmission path for transmitting a signal, a jacket covering the transmission path, and a shield as a fixed member that is interposed between the transmission path and the jacket and covers the transmission path. It has a part extending outward from the outer end of the outer cover, the part is folded back on the outer peripheral surface of the outer cover, and the strain relief contracts over the part of the shield, so that the space between the outer cover and the strain relief The strain relief may have a third slit formed along the circumferential direction, and the shield exposed from the third slit may be fixed to the connector. In this manner, by removing the shield from the strain relief slit and fixing the shield to the connector, the strain relief can be indirectly fixed to the connector via the shield. Further, the strain relief itself can be prevented from being damaged through the shield even when a strong tensile force is applied to the cable.

[Details of the embodiment of the present invention]
Hereinafter, an embodiment of the cable terminal structure of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
FIG. 1 is a perspective view showing an appearance of a cable terminal structure 10A according to an embodiment of the present invention. As shown in FIG. 1, the cable terminal structure 10 </ b> A includes a cable bundle 20 in which a plurality of coaxial cables are accommodated in a sheath, a connector 11 attached to a terminal portion of the cable bundle 20, and a rear end of the connector 11. And a strain relief 30A attached to the cable bundle 20. The connector 11 has a metal housing 12, and one end of the cable bundle 20 and the circuit board 17 are accommodated in the metal housing 12. Transmission paths (center conductors) of a plurality of coaxial cables included in the cable bundle 20 are fixed by being soldered to the circuit board 17. The strain relief 30 </ b> A fixes the terminal portion of the cable bundle 20 to the connector 11 by covering the connection portion between each coaxial cable included in the cable bundle 20 and the connector 11.

  2 is an enlarged perspective view showing one of the plurality of coaxial cables 21 included in the cable bundle 20 shown in FIG. As shown in FIG. 2, the coaxial cable 21 includes a transmission path (center conductor) 23 that transmits an electrical high-frequency signal, an internal insulating layer 24 that covers the transmission path 23, and a shield 25 that covers the internal insulating layer 24. The outer cover 26 covering the shield 25 is included. The transmission path 23 is made of, for example, a copper alloy. The internal insulating layer 24 is made of an insulating resin or the like. The shield 25 is interposed between the jacket 26 and the transmission path 23 (between the internal insulating layer 24 and the jacket 26 in this embodiment) and covers the transmission path 23, and is made of a copper alloy or the like. This is a horizontally wound shield in which a conductor is horizontally wound. The outer cover 26 is made of an insulating resin or the like, like the inner insulating layer 24. When mounted on the circuit board 17 shown in FIG. 1, as shown in FIG. 2, the transmission path 23, the internal insulating layer 24, and the shield 25 are exposed by a predetermined length in order from the tip. Each layer is removed.

  FIG. 3 is a perspective view showing the appearance of the strain relief 30A. The strain relief 30A is made of a tubular shrink material. The strain relief 30A contracts due to heat, for example. The strain relief 30A fixes the connector 11 shown in FIG. 1 and the coaxial cable 21 shown in FIG. That is, the force with which the strain relief 30A fixes the connector 11 includes the contraction force of the strain relief 30A.

  As shown in FIG. 3, the strain relief 30A intersects the first portion 31 fixed to the connector 11 and the central axis direction of the coaxial cable 21 (that is, the direction along the central axis C1 of the strain relief 30A). And a second portion 32A that is elastically bent in the direction to be bent. The second portion 32A is configured by forming a plurality of slits 33a (first slits) extending in the circumferential direction of the tubular shrinkable material. Here, the slit means, for example, an elongated opening (cut). In the present embodiment, the slit set 33 including two or more (two in the present embodiment) slits 33a formed side by side along the circumferential direction around the central axis C1 of the strain relief 30A extends along the central axis C1. A plurality (four sets in the figure) are formed at intervals in the direction. The positions of the portions 33b between the two or more slits 33a in the circumferential direction are alternately shifted by 90 ° in the plurality of slit sets 33. For example, in the odd-numbered slit set 33 counted from the first portion 31 side, the portion 33b is located on the axis orthogonal to the central axis C1, and in the even-numbered slit set 33, the axis and the central axis C1 Located on an axis perpendicular to both. In other words, in the odd-numbered slit set 33, the portion 33b is located so as to intersect the plane formed by the axis C2 and the central axis C1 orthogonal to the central axis C1, and in the even-numbered slit set 33, The portion 33b is located so as to intersect a plane formed by the axis C3 and the center axis C1 orthogonal to both the center axis C1 and the axis C2.

  By forming the slit 33 a as described above in the second portion 32 </ b> A, the second portion 32 </ b> A can be bent with a smaller force than the first portion 31. The bending direction of the second portion 32A is defined by the positional relationship between the slit 33a and the portion 33b. For example, when the portion 33b is located on a plane formed by the axis C2 and the central axis C1 at a certain location of the second portion 32A, the location of the strain relief 30A is a direction along the axis C3 orthogonal to the axis C2. It becomes easy to bend. Further, when the portion 33b is located on a plane formed by the axis C3 and the central axis C1 at another location of the second portion 32A, the location of the strain relief 30A is easily bent in the direction along the axis C2. As described above, in the present embodiment, the positions of the portions 33b are alternately shifted by 90 °. Therefore, the second portion 32A is easily bent in two directions along the axes C2 and C3 orthogonal to each other.

  Note that no slits are formed in the first portion 31, and the tubular shrink material of the first portion 31 is continuously present in the direction of the central axis C <b> 1 at any position in the circumferential direction.

  FIG. 4 is a side sectional view schematically showing a configuration of a connection portion between the connector 11 and the coaxial cable 21. As shown in FIG. 4, the metal housing 12 of the connector 11 has a flange portion (cable insertion portion) 13 at a portion corresponding to the rear wall. The flange portion 13 includes an insertion hole 13a through which the coaxial cable 21 is inserted, and an outer peripheral surface 13b surrounding the insertion hole 13a. Further, at the end portion of the coaxial cable 21, the outer covering 26 is partially removed, so that the shield 25 has a portion 25 a extending outward from the end of the outer covering 26. The portion 25 a is folded back on the outer peripheral surface of the outer cover 26, and is sandwiched between the insertion hole 13 a of the flange portion 13 and the outer cover 26. Thereby, since the flange part 13 and the shield 25 contact each other and are electrically connected, the shield 25 and the metal housing 12 function as a sufficient electromagnetic shielding shield.

  Further, the portion 25a of the shield 25 is folded back again at the rear end of the insertion hole 13a and extends on the outer peripheral surface 13b. When the cable terminal structure 10A is manufactured, the strain relief 30A covers the outer peripheral surface 13b and the outer cover 26 extending from the insertion hole 13a after the portion 25a is folded back on the outer peripheral surface 13b. Be placed. In other words, the coaxial cable 21 and a part of the flange portion 13 are disposed inside the strain relief 30A. In this state, the strain relief 30A is heated and contracted. As a result, the first portion 31 of the strain relief 30A covers the outer peripheral surface 13b of the flange portion 13 with the portion 25a of the shield 25 interposed therebetween, and the portion 25a and the outer peripheral surface 13b are inward (side toward the coaxial cable 21) by the contraction force. ). The second portion 32A of the strain relief 30A is in close contact with the outer cover 26 extending from the insertion hole 13a. In this way, the connector 11 and the coaxial cable 21 are fixed via the strain relief 30A.

  The effects obtained by the cable terminal structure 10A of the present embodiment described above will be described. In this cable terminal structure 10A, the connector 11 and the coaxial cable 21 are fixed to each other by the force by which the strain relief 30A contracts. Since the strain relief 30A is made of a tube-shaped shrinking material, its structure is simple. The connector 11 does not require a mechanism for tightening the strain relief 30A, and the structure can be simplified. Further, since the strain relief 30A can be fixed to the connector 11 simply by contracting, the attachment can be performed easily. Furthermore, since the force for fixing the strain relief 30A and the connector 11 mainly depends on the contraction force of the strain relief 30A, it is easy to ensure a sufficient fixing force. In other words, according to the cable terminal structure 10A of the present embodiment, the structure of the strain relief 30A and the connector 11 can be simplified and can be easily attached, and the fixing force thereof can be further increased.

  Further, as in the present embodiment, the strain relief 30A is elastically bent in a direction intersecting the central axis direction of the coaxial cable 21 separately from the first portion 31 fixed to the connector 11. 32A may be included. As described above, the two functions required for the strain relief 30A are performed by different parts (the first part 31 and the second part 32A), so that the strain relief 30A having the above effects can be easily realized. it can.

  Further, as in the present embodiment, the second portion 32A of the strain relief 30A may be formed by forming a slit 33a extending in the circumferential direction in a tube-shaped shrinkable material. Thereby, since the strain relief 30A is easily bent in the radial direction intersecting the slit 33a, the bending direction of the coaxial cable 21 can be easily defined. Further, as in the present embodiment, a plurality of slit sets 33 including two or more slits 33a formed side by side along the circumferential direction are formed at intervals in the central axis direction of the coaxial cable 21, The positions of the portions 33b between the two or more slits 33a in the circumferential direction may be alternately shifted by 90 ° in the plurality of slit sets 33. Accordingly, the strain relief 30A is easily bent in a certain radial direction (for example, a direction along the axis C2) and a radial direction orthogonal to the direction (for example, a direction along the axis C3). Can be easily regulated in two directions.

  Further, as in the present embodiment, the connector 11 has a flange portion 13 including an insertion hole 13a through which the coaxial cable 21 is inserted and an outer peripheral surface 13b surrounding the insertion hole 13a, and the strain relief 30A includes the flange portion 13. The outer peripheral surface 13b may be pressed inward by contraction force. As a result, the contraction force of the strain relief 30A can be directly applied to a part of the connector 11, so that the structure for fixing the strain relief 30A to the connector 11 can be simplified and a strong fixing force can be easily secured. it can.

(First modification)
Here, a modification of the shape of the strain relief will be described. FIG. 5 is a perspective view showing an appearance of the strain relief 30B according to the first modification. The difference between the strain relief 30B of the present modification and the strain relief 30A of the above embodiment is the arrangement of the slits. In the present modification, as in the above-described embodiment, in the second portion 32B of the strain relief 30B, a plurality of slit sets 33 including two or more slits 33a formed side by side along the circumferential direction are spaced apart from each other. Is formed. However, the positions of the portions 33 b between the two or more slits 33 a in the circumferential direction are equal to each other in the plurality of slit sets 33. That is, in any slit set 33, the portion 33b is located on a certain axis (for example, an axis parallel to the axis C2) orthogonal to the central axis C1. In other words, in any slit set 33, the portion 33b is positioned so as to intersect with a plane formed by the axis C2 and the center axis C1 orthogonal to the center axis C1. Thereby, since the strain relief 30B is easily bent only in a certain radial direction, the bending direction of the coaxial cable 21 can be easily restricted to one direction (for example, the direction along the axis C2).

(Second modification)
FIG. 6 is a perspective view showing an appearance of a strain relief 30C according to the second modification. The difference between the strain relief 30C of the present modification and the strain relief 30A of the above embodiment is the shape of the slit. In the second portion 32C of this modification, a spiral slit 34 (second slit) is formed in a tubular shrinkable material. Thereby, since the strain relief 30C is easily bent equally in all radial directions, a configuration in which the bending direction of the coaxial cable 21 is not restricted to a specific direction can be easily realized.

(Second Embodiment)
FIG. 7 is a side sectional view showing a cable terminal structure 10B according to the second embodiment of the present invention. As shown in FIG. 7, also in this embodiment, the portion 25 a of the shield 25 is folded back on the outer peripheral surface of the outer cover 26 and is sandwiched between the insertion hole 13 a of the flange portion 13 and the outer cover 26. Yes. The portion 25a is folded back at the rear end of the insertion hole 13a and extends on the outer peripheral surface 13b. The portion 25a is fixed on the outer peripheral surface 13b by being sandwiched (clamped) between the annular caulking member 16 and the outer peripheral surface 13b, for example. Thus, the portion 25 a is a fixed member that constitutes a part of the coaxial cable 21 and is fixed to the connector 11. The method of fixing the portion 25a to the connector 11 is not limited to such a method, and various methods can be applied.

  Further, the cable terminal structure 10B of the present embodiment includes a strain relief 30D instead of the strain relief 30A of the first embodiment. The configuration of the strain relief 30D is the same as that of the strain relief 30A except that the strain relief 30D has a slit 35 (third slit). The slit 35 is an opening formed in the second portion 32A, and extends in the circumferential direction of the tubular shrinkable material. The first portion 31 of the strain relief 30D is sandwiched between the insertion hole 13a and the portion 25a of the shield 25. In other words, the portion 25 a of the shield 25 is disposed between the first portion 31 of the strain relief 30 </ b> D and the outer cover 26. The portion 25a extends from the slit 35 to the outside of the strain relief 30D and is extended to the outer peripheral surface 13b. The strain relief 30D applies a contraction force to the portion 25a.

  When producing the cable terminal structure 10B of the present embodiment, first, the folded portion 25a of the shield 25 is pulled out from the slit 35 of the strain relief 30D. In this state, the strain relief 30D and the shield 25 are fixed by heating and contracting the strain relief 30D. Next, the drawn portion 25a is directly fixed to the flange portion 13 by using, for example, the crimping member 16 or the like.

  According to the cable terminal structure 10B of the present embodiment, as in the first embodiment, the structure of the strain relief 30D and the connector 11 can be simplified and can be easily attached, and the fixing force thereof is further increased. be able to. In the cable terminal structure 10 </ b> B of the present embodiment, the strain relief 30 </ b> D gives a contracting force to the fixed member (part 25 a) that constitutes a part of the coaxial cable 21 and is fixed to the connector 11. Even with this configuration, the strain relief of the strain relief 30D can be indirectly applied to a part of the connector 11 via the tension of the shield 25, and the strain relief 30D can be easily fixed to the connector 11. Also in the configuration of this embodiment, the shield 25 and the metal housing 12 (flange portion 13) are electrically connected to each other, so that an electromagnetic shielding function is sufficiently ensured.

  In the present embodiment, the strain relief 30A covers the portion 25a of the shield 25 and contracts, so that the portion 25a is fixed between the jacket 26 and the strain relief 30D, and the portion 25a exposed from the slit 35 is the connector 25a. 11 is fixed. Thus, by removing the shield 25 from the slit 35 of the strain relief 30D and fixing the shield 25 to the connector 11, the strain relief 30D can be strongly fixed to the connector 11 via the shield 25. Further, since the shield 25 is interposed in this way, even when a strong tensile force is applied to the coaxial cable 21, the strain relief 30D itself can be prevented from being damaged.

(Third embodiment)
FIG. 8 is a side sectional view showing a cable terminal structure 10C according to the third embodiment of the present invention. As shown in FIG. 8, the portion 25 a of the shield 25 in the present embodiment is folded back on the outer peripheral surface of the outer cover 26, but does not extend from the slit 35 to the outside of the strain relief 30 </ b> D. Stay inside 30D. A part 12 a of the metal housing 12 is fitted inside the slit 35, and the part 25 a is fixed to the connector 11 by being sandwiched between the part 12 a of the metal housing 12 and the jacket 26. . Thus, the portion 25 a is a fixed member that constitutes a part of the coaxial cable 21 and is fixed to the connector 11.

  As described above, in this embodiment as well, as in the second embodiment, the strain relief 30D forms a part of the coaxial cable 21 and contracts with respect to the fixed member (part 25a) fixed to the connector 11. give. Therefore, the contraction force of the strain relief 30D can be indirectly applied to the fixation between the connector 11 and the shield 25, and the coaxial cable 21 and the connector 11 can be fixed easily and firmly. Also in the configuration of this embodiment, the shield 25 and the metal housing 12 (part 12a) are electrically connected to each other, so that an electromagnetic shielding function is sufficiently ensured.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in each of the above embodiments, a cable bundle composed of a plurality of coaxial cables is shown as an example of the cable. However, the cable of the present invention is not limited to such a cable bundle. For example, a single coaxial cable or a pair of cables is used. It is also possible to use a twinax wire or the like in which a set of electric wires for transmitting the differential signal is accommodated in a single jacket. Or the optical cable containing an optical fiber may be sufficient as the cable of this invention, and the electro-optical composite cable containing both an optical fiber and an electric wire may be sufficient as it.

  DESCRIPTION OF SYMBOLS 10A-10C ... Cable terminal structure, 11 ... Connector, 12 ... Metal housing, 13 ... Flange part, 13a ... Insertion hole, 13b ... Outer peripheral surface, 16 ... Caulking member, 17 ... Circuit board, 20 ... Cable bundle, 21 ... Coaxial Cable, 23 ... Transmission path, 24 ... Inner insulating layer, 25 ... Shield, 26 ... Jacket, 30A-30D ... Strain relief, 31 ... First part, 32A-32C ... Second part, 33 ... Slit assembly, 33a ... (First) slit, 34... (Second) slit, 35... (Third) slit.

Claims (9)

A cable including at least one of an electric wire and an optical fiber;
A connector attached to a terminal portion of the cable;
A strain relief for securing the end of the cable to the connector;
With
A cable terminal structure in which the strain relief is made of a tube-shaped shrink material, and the force by which the strain relief fixes the terminal portion includes the shrinkage force of the strain relief.   2. The cable terminal according to claim 1, wherein the strain relief includes a second portion that is elastically bent in a direction intersecting with a central axis direction of the cable, separately from the first portion fixed to the connector. Construction.   3. The cable terminal structure according to claim 2, wherein the second portion is formed by forming a first slit extending in a circumferential direction in the tubular shrinkable material. A plurality of slit sets composed of two or more first slits formed side by side along the circumferential direction are formed at intervals in the central axis direction,
4. The cable terminal structure according to claim 3, wherein positions of portions between the two or more first slits in the circumferential direction are alternately shifted by 90 ° in the plurality of slit sets. 5. A plurality of slit sets composed of two or more first slits formed side by side along the circumferential direction are formed at intervals in the central axis direction,
The cable terminal structure according to claim 3, wherein positions of portions between the two or more first slits in the circumferential direction are equal to each other in the plurality of slit sets.   3. The cable terminal structure according to claim 2, wherein the second portion is formed by forming a spiral second slit in the tubular shrinkable material. The connector has a cable insertion portion including an insertion hole for inserting the cable and an outer peripheral surface surrounding the insertion hole,
The cable terminal structure according to claim 1, wherein the strain relief presses the outer peripheral surface of the cable insertion portion inward by the contraction force.   The cable strain structure according to any one of claims 1 to 6, wherein the strain relief applies the contraction force to a fixed member that constitutes a part of the cable and is fixed to the connector. The cable has a transmission path for transmitting a signal, a jacket covering the transmission path, and a shield as the fixed member interposed between the transmission path and the jacket to cover the transmission path,
The shield has a portion extending outward from a terminal end of the jacket, and the portion is folded on the outer peripheral surface of the jacket;
When the strain relief shrinks over the portion of the shield, the shield is fixed between the jacket and the strain relief,
The cable terminal structure according to claim 8, wherein the strain relief has a third slit formed along a circumferential direction, and the shield exposed from the third slit is fixed to the connector.

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