JP5059481B2 - Shield connector - Google Patents

Description

  The present invention relates to a shield connector used for connecting shielded wires.

  2. Description of the Related Art Conventionally, connectors are used for wiring connection between electric and electronic devices in the fields of vehicles such as automobiles, OA equipment, and home appliances. In particular, shielded wires are used for wiring such as devices that perform data communication in order to prevent noise from entering, and shield connectors are used to connect the shielded wires.

  An example of a conventional shielded wire and a shield connector connected to the terminal is shown in FIG.

  The shielded electric wire 100 has a structure in which the outer periphery of the signal conductor 102 is covered with a shield conductor 106 made of a braid of a plurality of strands with the insulator 104 interposed, and the outer periphery of the shield conductor 106 is an insulating sheath 108. It is covered with.

  The shield connector 110 connected to the end of the shielded electric wire 100 has an inner conductor terminal 112 connected to the signal conductor 102 and a shield conductor 106 and electromagnetically covers the outer periphery of the inner conductor terminal 112. The outer conductor terminal 114 is shielded, and the dielectric 116 is interposed between the inner conductor terminal 112 and the outer conductor terminal 114.

  The outer conductor terminal 114 of the shield connector 110 is provided with a shield conductor crimping portion 118 and a sheath crimping portion 120, and the shield conductor 106 and the sheath 108 are respectively crimped and fixed.

As such a conventional shield connector, for example, the one disclosed in Patent Document 1 is known.
JP 2003-163058 A

  In general, in such a shielded connector, a strong wire adhering force is required in order to prevent the shielded wire from coming off from the shielded connector when connecting to a mating connector.

  However, in automobiles with limited wiring space, there is a demand for reducing the diameter of the shielded electric wire. When a shielded electric wire with a small diameter is used, it is difficult to obtain a sufficient electric wire adhering force with the above-described conventional shielded connector. There was a problem.

  The problem to be solved by the present invention is to provide a shield connector capable of obtaining a sufficient wire fixing force even with a shield wire having a small diameter.

In order to solve the above-described problems, the shield connector according to the present invention includes an inner conductor terminal on the signal conductor of the shielded electric wire, in which the shield conductor is covered around the signal conductor via an insulator, and the outer periphery is covered with a sheath. The inner conductor terminal is accommodated in the outer conductor terminal via a dielectric, and the shield conductor and the sheath are respectively crimped and fixed by the shield conductor crimping portion and the sheath crimping portion of the outer conductor terminal. A cylindrical connector is inserted between the shield conductor and the insulator, and a cylindrical body independent of the outer conductor terminal is inserted between the shield conductor and the insulator, and the cylindrical body extends from the thin plate material to the edge of the thin plate material. it is formed so that the butt cylindrical, it is the inner and outer peripheral surfaces of the cylindrical body surface treatment for increasing frictional force consisting of reticulated knurling or more protrusions are subjected It is an gist.

  Furthermore, the cylindrical body may be inserted to the position of the sheath crimping portion of the outer conductor terminal.

  According to the shield connector of the present invention, a cylindrical body having a surface treatment that increases the frictional force is inserted between the shield conductor and the insulator, and the outer conductor terminal of the shield connector is crimped. And stick. Therefore, when a tensile force is applied to the shielded electric wire, a frictional force acts between the cylindrical body and the insulator in the opposite direction to the tensile force, so that sufficient electric wire adhering force can be obtained even with a shielded wire with a small diameter. Can do.

  Further, the present invention can be easily implemented simply by adding a cylindrical body to the conventional shield connector.

  If the surface treatment is also applied to the outer peripheral surface of the cylindrical body, when a tensile force is applied to the shielded electric wire, a frictional force is also applied between the cylindrical body and the shield conductor in a direction opposite to the tensile force. Since this works, the electric wire fixing force can be further increased.

  Further, as the surface treatment, the frictional force can be easily increased by imparting surface roughness to the cylindrical body.

In this case, a configuration to realize the above surface roughness, if mesh knurled Thomas et long as a plurality of projections are used, more excellent in the function and effect.

  Furthermore, if the cylindrical body is inserted up to the position of the sheath crimping portion of the outer conductor terminal, the contact area between the cylindrical body, the shield conductor, and the insulator increases, so that the wire adhering force can be further improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a cross-sectional view showing an example of the shield connector of the present invention. As shown in FIG. 1, a shield connector 10 according to an embodiment of the present invention is attached to the end of a shielded electric wire 20. In the shielded electric wire 20, the shield conductor 16 is covered around the signal conductor 12 via the insulator 14, and the outer periphery of the shield conductor 16 is covered by the sheath 18. Further, at the end of the shielded electric wire 20, the sheath 18 and the insulator 14 are peeled off to expose the signal conductor 12 and the shield conductor 16, and the shield connector 10 and the shielded electric wire 20 are electrically connected.

  The shield connector 10 is provided between the inner conductor terminal 24 connected to the signal conductor 12, the outer conductor terminal 26 connected to the shield conductor 16, and the inner conductor terminal 24 and the outer conductor terminal 26. And a cylindrical body 22 inserted between the shield conductor 16 and the insulator 14.

  The inner conductor terminal 24 is adapted to transmit a high frequency signal from the signal conductor 12. The periphery of the inner conductor terminal 24 is covered with an outer conductor terminal 26 electrically connected to the shield conductor 16 and is configured to be electromagnetically shielded.

  A shield conductor crimping portion 30 and a sheath crimping portion 32 are extended from the outer conductor terminal 26.

  The cylindrical body 22 is pressed down simultaneously when the shield conductor 16 and the sheath 18 are crimped and fixed by the shield conductor crimping portion 30 and the sheath crimping portion 32, respectively.

  The inner peripheral surface of the cylindrical body 22 is subjected to a surface treatment that increases the frictional force. As the surface treatment for increasing the frictional force, for example, surface roughness is given. In the case of imparting surface roughness, the cylindrical body is preferably formed from a thin plate material. This is because if the surface roughness is imparted to the thin plate material before forming the cylindrical body, the cylindrical body can be easily formed.

  And it is preferable that the surface roughness is uniformly applied to one surface or both surfaces of the thin plate material. The surface roughness can be formed by die cutting, cutting, blasting, or the like.

  The cylindrical body is processed by punching a thin plate material made of metal such as brass or stainless steel with a surface roughness into a predetermined shape, and the inner diameter dimension is approximately the same as the outer diameter dimension of the shield wire insulator. It is good to form by press work etc. so that it may become.

  FIG. 2 is a plan view showing an example of a thin plate material that has been given a surface roughness and processed into a predetermined shape. As the surface roughness, for example, as shown in FIG. 2A, a mesh knurl 40 is preferably applied. The mesh knurl 40 is preferably formed so as to be in contact with the longitudinal direction of the shielded wire 20 at about ± 45 degrees when the cylindrical body 22 is inserted into the shielded wire 20.

  Further, as shown in FIG. 2B, a plurality of grooves 42 may be formed. The plurality of grooves 42 are preferably formed so as to be in contact with the longitudinal direction of the shielded electric wire 20 at a substantially right angle when the cylindrical body 22 is inserted into the shielded electric wire 20.

  Furthermore, as shown in FIG. 2C, a plurality of protrusions 44 may be formed.

  FIG. 3 shows an example of a cylindrical body having an inner peripheral surface with surface roughness, where (a) is an external perspective view, and (b) is an enlarged view of part A of (a). The cylindrical body 22 is formed of a thin plate material having a mesh knurl 40 applied to the inner peripheral surface as a surface roughness and processed into a predetermined shape. The cylindrical body 22 includes a plurality of protruding portions 56 and cutout portions 58 that are in contact with each other at the abutting end edges 52 and 54 that are seams in the circumferential direction, and are formed so as to mesh with each other.

  The shape of the protrusion part 56 and the notch part 58 is not specifically limited, For example, a rectangular shape may be sufficient. Moreover, the number of the protrusion parts 56 and the notch parts 58 is not specifically limited. The abutting edges 52 and 54 of the thin plate material may be in contact with each other to form a longitudinal seam of the cylindrical body 22, and the projecting portions 56 and the notches 58 are not provided on the abutting edges 52 and 54. Also good.

  Further, the end of the cylindrical body 22 may be tapered so that it can be easily inserted between the insulator 14 of the shielded electric wire 20 and the shield conductor 16.

  4A and 4B show an example of a cylindrical body having a surface roughness given to the inner peripheral surface and the outer peripheral surface. FIG. 4A is an external perspective view, and FIG. 4B is an enlarged view of a portion B in FIG. . The cylindrical body 22 is formed of a thin plate material having a mesh knurl 40 applied to the inner peripheral surface and the outer peripheral surface as a surface roughness and processed into a predetermined shape. Similarly to FIG. 3, the cylindrical body 22 is formed so that the abutting end edges 52, 54, which are circumferential seams, are provided with a plurality of protrusions 56 and notches 58 and mesh with each other.

  The shape of the surface roughness of the cylindrical body 22 may be the same on the inner peripheral surface and the outer peripheral surface, or may be different. For example, a mesh knurl 40 may be provided on the inner peripheral surface, while a plurality of protrusions 44 may be provided on the outer peripheral surface.

  In addition to imparting the above surface roughness, a resin may be applied as a surface treatment for increasing the frictional force. Examples of the resin include polyurethane, ethylene-propylene rubber, butadiene rubber, isoprene rubber, silicone rubber, and the like, but are not particularly limited thereto. Further, the resin may have adhesiveness.

  When the resin is applied, the cylindrical body may be formed from a thin plate material, or may be formed by cutting a seamless pipe-shaped member into a predetermined length.

  When surface treatment is performed on the inner peripheral surface and the outer peripheral surface of the cylindrical body, the resin may be applied to both the inner peripheral surface and the outer peripheral surface, or the resin may be applied to one of the inner peripheral surface or the outer peripheral surface. It may be applied and surface roughness may be imparted to the other.

  The steps of attaching the shield connector 10 having such a configuration to the shielded electric wire 20 include i) peeling the shielded electric wire 20 to expose the signal conductor 12 and the shield conductor 16 ii) attaching the inner conductor terminal 24 to the signal conductor 12 Iii) widen the inner diameter of the shield conductor 16 and insert the cylindrical body 22 between the shield conductor 16 and the insulator 14, and iv) connect the inner conductor terminal 24 to the outer conductor terminal 26 containing the dielectric 28. V) It is a process of crimping the shield conductor 16 and the sheath 18 by crimping them with the shield conductor crimping portion 30 and the sheath crimping portion 32 of the outer conductor terminal 26.

  At this time, the cylindrical body 22 is preferably inserted up to the position of the sheath crimping portion 32 of the outer conductor terminal 26.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above-described embodiment, the shield conductor of the shielded electric wire may be provided with a plurality of layers. The type of the shield conductor is not particularly limited. For example, a conductor foil may be provided on the outer periphery of the insulator, and a braid may be provided on the outer periphery of the conductor foil. In this case, the cylindrical body may be inserted between the conductor foil and the insulator, or may be inserted between the conductor foil and the braid.

  Moreover, a non-foaming type thing may be used for the insulator of a shield wire, and a foaming type thing may be used.

  Furthermore, the shield connector of the present invention can be used regardless of the diameter of the shielded electric wire.

The shield connector which concerns on this invention can be used suitably for the shielded electric wire connected to vehicle equipment, OA equipment, household appliances, etc.

It is sectional drawing which shows an example of the shield connector of this invention. It is a top view which shows an example of the thin plate material which gave surface roughness and was processed into the predetermined shape, (a) is a mesh knurl, (b) is a plurality of grooves, (c) is provided with a plurality of protrusions. Yes. An example of the cylindrical body by which surface roughness was provided to the internal peripheral surface is shown, (a) is an external appearance perspective view, (b) is the A section enlarged view of (a). An example of the cylindrical body by which surface roughness was provided to the inner peripheral surface and the outer peripheral surface is shown, (a) is an external perspective view, and (b) is an enlarged view of a portion B of (a). It is sectional drawing which shows an example of the conventional shielded electric wire and the shield connector connected to the terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Shield connector 12 ... Signal conductor 14 ... Insulator 16 ... Shield conductor 18 ... Sheath 20 ... Shield electric wire 22 ... Cylindrical body 24 ... Inner conductor terminal 26 ... Outer conductor terminal 28 ... Dielectric 30 ... Shield conductor crimping part 32 ... Sheath crimping part

Claims (2)

An inner conductor terminal is connected to the signal conductor of the shielded wire whose outer periphery is covered with a sheath, and the inner conductor terminal is connected to the outer conductor via a dielectric. A shield connector that is housed in a terminal and is fixed by crimping the shield conductor and the sheath by a shield conductor crimping portion and a sheath crimping portion of the outer conductor terminal,
A cylindrical body that is independent from the outer conductor terminal is inserted between the shield conductor and the insulator, and the cylindrical body has a cylindrical shape that abuts the edge of the thin plate material from the thin plate material. The shield connector is characterized in that a surface treatment is performed on the inner peripheral surface and the outer peripheral surface of the cylindrical body to increase the frictional force composed of a mesh knurl or a plurality of protrusions . The shield connector according to claim 1 , wherein the cylindrical body is inserted to the position of the sheath crimping portion of the outer conductor terminal.

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