JP2009266452A - Shield connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield connector in which fitting of a sleeve member to a shield wire is easy and a sufficient wire adhesion force is obtained. <P>SOLUTION: The shield connector 10 has a sleeve member 22 in which a plurality of biting members 40 are formed at prescribed intervals in the circumference direction, and these biting members 40 bite into the terminal of a shield conductor 16 of the shield wire 20 peeled off, and are inserted so as to push and separate the shield conductor 16, and the shield conductor 16 and a sheath material 18 are respectively caulked and adhered by a shield conductor crimping part 30 and a sheath material crimping part 32 of an external conductor terminal 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shield connector, and more specifically, a terminal portion of a shielded electric wire covered with a shield conductor formed of a braid formed by braiding a plurality of fine metal wires in a net shape with an insulator around a signal conductor. The present invention relates to an improved technique for a shielded connector in which a sleeve member is interposed so as not to be deformed even by the caulking process.

  In the fields of vehicles such as automobiles, office automation equipment, and home appliances, shielded wires are used to prevent noise from being mixed especially in the wiring of data communication equipment when wiring connections between electrical and electronic equipment. A shield connector is generally used to connect this shielded wire.

  The shield connector is connected to the shielded wire by crimping, but the insulation of the shielded wire is easily crushed by the crimping force, and when the electrical signal is transmitted, the impedance may fluctuate greatly and the shield performance may be impaired. . In addition, when connecting to a connector on the other side, a strong wire adhering force is required to prevent the shielded wire from coming off from the shield connector.

  For this reason, when the shield connector is crimped and connected to the shielded electric wire, there is one in which the shielded electric wire is protected by a sleeve member or the like in order to prevent the insulator of the shielded electric wire from being crushed and to secure the electric wire fixing force.

  For example, as such a shielded connector, one disclosed in Patent Document 1 is known. An example of this will be described with reference to FIG. 4. In the shielded electric wire 100, the insulator 104 is interposed on the outer periphery of the signal conductor 102, and the shield conductor 106 made of a braid in which a plurality of strands are knitted around is covered. The outer periphery of the shield conductor 106 is covered with an insulating sheath material 108. A sleeve member 122 is inserted between the insulator 104 and the shield conductor 106, and the inner conductor terminal 112 of the shield connector 110 is connected to the signal conductor 102 at the end of the shielded electric wire 100. An outer conductor terminal 114 is mounted around the outer periphery of the outer conductor terminal 114 via a dielectric 116. The outer conductor terminal 114 is provided with a shield conductor crimping portion 118 and a sheath material crimping portion 120, and the shield conductor 106 and the sheath material 108 are respectively added thereto. It is fastened and fixed.

JP 2000-260540 A

  However, in the shield connector 110 shown in FIG. 4, when the sleeve member 122 is inserted between the insulator 104 and the shield conductor 106, as shown in FIGS. There is a problem that this work is very complicated.

  In addition, when the shield conductor 106 is expanded as shown in FIG. 5, the shield conductor 106 is easily unwound at the terminal, and when the shield connector 110 is connected to the shielded electric wire 100, the strand of the shield conductor 106 contacts the signal conductor 102. May cause a short circuit. For this reason, it is necessary to trim the end portion of the shield conductor 106 using a cutter or the like. However, since the diameter of the wire constituting the shield conductor 106 is thin, the insulation provided inside the shield conductor 106 during the trimming operation. The body 104 and the signal conductor 102 are easily damaged. For this reason, high accuracy is required for this work, and there is a problem that work efficiency is poor.

  Therefore, the problem to be solved by the present invention is to provide a shield connector in which a sleeve member can be easily attached to a shielded electric wire and a sufficient electric wire fixing force can be obtained.

  In order to solve the above-mentioned problems, the shield connector according to the present invention is covered with a shield conductor made of a braid of a plurality of fine metal wires braided around an insulating body around a signal conductor, and its outer periphery is insulative. An inner conductor terminal is connected to the end of the signal conductor of the shielded wire covered with the sheath material, the inner conductor terminal is accommodated in the outer conductor terminal via a dielectric, and the shield conductor crimping portion of the outer conductor terminal In the shield connector in which the shield conductor and the sheath material are respectively crimped and fixed by the sheath material crimping portion, a sleeve member is inserted between the insulator and the sheath material of the end portion of the shielded electric wire In addition, the sleeve member is formed with a plurality of biting pieces at predetermined intervals in the circumferential direction at one end edge of the sleeve cylindrical portion mounted around the insulator, The have included strips is intended to subject matter that the shield conductor is thrust through.

  In this case, it is desirable that each biting piece of the sleeve member is formed in a tapered shape, and the tip portion thereof bites into the shield conductor to prevent the sleeve member from being pulled out.

  And it is desirable for the front-end | tip part of each biting piece of the said sleeve member to be processed into the acute angle shape.

  Further, it is desirable that a braided stop portion is formed at the edge of the sleeve cylinder of the sleeve member, which is located between the biting pieces and prevents the end portion of the shield conductor from protruding.

  Further, it is desirable that the biting piece of the sleeve member is inserted to the shield conductor crimping portion position of the outer conductor terminal and is crimped from above the biting piece.

  According to the shield connector of the present invention, the sleeve member in which a plurality of biting pieces are formed at predetermined intervals in the circumferential direction is inserted so as to bite between the insulator of the terminal portion of the shielded wire and the sheath material, and the shield conductor is They are pushed by each biting piece, and are crimped and fixed by outer conductor terminals. Therefore, the sleeve member can be attached to the shielded electric wire without spreading the shield conductor, the terminal connection work of the shielded electric wire can be easily performed, and a sufficient electric wire fixing force can be obtained.

  Further, if each biting piece of the sleeve member is formed in a tapered shape, the tip end portion thereof bites into the shield conductor and is locked, so that the electric wire fixing force can be further increased.

  And if the front-end | tip part of each said biting piece is processed into the acute-angle shape, the front-end | tip part will become easy to bite into a shield conductor more, and electric wire adhering force can be raised further.

  Furthermore, if the braided stop is formed at the edge of the sleeve cylinder of the sleeve member, it is possible to prevent the shield conductor from coming into contact with the signal conductor, and to ensure high reliability of the shield connector.

  Further, if the biting piece of the sleeve member is inserted up to the position of the shield conductor crimping portion of the outer conductor terminal, a sufficient contact area between the sleeve member and the shield conductor can be obtained, and the electric wire fixing force can be further improved. .

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

  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 with the sheath material 18. The shield conductor 16 is formed of a braid obtained by braiding a plurality of fine metal wires in a net shape. And the terminal of the shielded electric wire 20 peels off the sheath material 18 and the insulator 14, and the signal conductor 12 and the shield conductor 16 are exposed, 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 sleeve member 22 inserted between the insulator 14 and the sheath material 18. The shield conductor 16 and the sleeve member 22 are configured to be substantially on the same plane. 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 material crimping portion 32 are extended from the outer conductor terminal 26.

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

  The sleeve member 22 has a plurality of biting pieces 40 formed at predetermined intervals in the circumferential direction at one end edge of a sleeve cylinder portion 48 to be described later, so that the shield conductor 16 is pushed away from the end side of the shielded electric wire 20. Has been inserted.

  FIG. 2 is a perspective view showing an example of the sleeve member 22. The biting piece 40 is formed in a tapered shape so that the tip end portion 42 can easily bite into the shield conductor 16. Further, the distal end portion 42 is processed into an acute angle shape and is easily bited by the shield conductor 16. Further, a braid stop 44 is formed between each biting piece 40 at the edge of the sleeve member 22. The braided stop portion 44 prevents the shield conductor 16 that has been pushed away when the sleeve member 22 is inserted into the shielded electric wire 20 from contacting the signal conductor 12.

  As such a sleeve member 22, the biting piece 40 is formed in a substantially triangular shape as shown in FIG. 2 (a), the one formed in a substantially pentagonal shape as shown in FIG. 2 (b), In addition, as shown in FIGS. 2C, 2D, and 2E, a braided stop portion 44 formed in a curved shape can be exemplified, but it is not particularly limited thereto. Further, the number and size of the biting pieces 40 can be appropriately changed according to the diameter and type of the shield conductor 16 of the shielded electric wire 20.

  The sleeve member 22 may be formed by cutting a pipe-shaped member made of a metal such as brass or stainless steel into a predetermined length, for example, or processing a thin plate material into a predetermined shape by punching or the like, You may form by press work etc. The sleeve member 22 is preferably formed so as to have an inner diameter dimension substantially the same as the outer diameter dimension of the insulator 14 of the shielded electric wire 20.

  FIG. 3 is a perspective view showing a process of attaching the sleeve member 22 to the shielded electric wire 20. As shown in FIG. 3A, the end of the shielded electric wire 20 has the sheath material 18 peeled off to a position slightly longer than the position where the shield conductor crimping portion 30 shown in FIG. 1 is crimped. Further, the shield conductor 16 and the insulator 14 are peeled off so that the end surfaces are substantially the same surface, and the signal conductor 12 is exposed. Then, the sleeve member 22 is inserted into the end of the shielded electric wire 20 in the direction shown in the figure. As shown in FIG. 3B, the sleeve member 22 is further inserted so that the tip portion 42 of the biting piece 40 bites into the end of the shield conductor 16 and pushes the shield conductor 16 apart, as shown in FIG. Thus, the sleeve member 22 is inserted until the end surface 46 and the end surface of the insulator 14 are substantially flush with each other. At this time, the braided stop portion 44 formed between each biting piece 40 prevents the pressed shield conductor 16 from contacting the signal conductor 12.

  Therefore, when the shield connector 10 is attached to the end of the shielded electric wire 20 covered with the braided shield conductor 16, the sleeve member 22 can be inserted into the shielded electric wire 20 without expanding the shield conductor 16. The terminal connection work of the electric wire 20 can be easily performed. Furthermore, since the braid stop 44 can prevent the shield conductor 16 from protruding to the signal conductor 12, it is not necessary to trim the end portion of the shield conductor 16.

  Then, as shown in FIG. 1, an inner conductor terminal 24 is crimped to the signal conductor 12 of the shielded electric wire 20 in which the sleeve member 22 is inserted, and the inner conductor terminal 24 accommodates a dielectric 28. It is inserted into the outer conductor terminal 26. Further, the biting piece 40 of the sleeve member 22 is inserted up to the position of the shield conductor crimping portion 30 of the outer conductor terminal 26. At this time, if the braided stop portion 44 is inserted to the position of the shield conductor crimping portion 30 of the outer conductor terminal 26 (dotted line portion in FIG. 1), a stronger electric wire fixing force can be obtained. Then, the shield conductor 16 and the sheath material 18 are respectively crimped by the shield conductor crimping portion 30 and the sheath material crimping portion 32 of the outer conductor terminal 26, and the shield conductor 16 and the outer conductor terminal 26 are electrically connected. The Through the above steps, the connection of the shield connector 10 to the shielded electric wire 20 is completed.

  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.

It is sectional drawing which shows an example of the shield connector of this invention. It is a perspective view which shows an example of a sleeve member. It is a perspective view which shows the process of attaching a sleeve member to a shield electric wire. It is sectional drawing which shows an example of the conventional shielded electric wire and the shield connector connected to the terminal. It is sectional drawing which shows the shield connector which inserted the sleeve member inside the conventional braid.

Explanation of symbols

10 ... Shield connector 12 ... Signal conductor 14 ... Insulator 16 ... Shield conductor (braided)
18 ... sheath material 20 ... shield wire 22 ... sleeve member 24 ... inner conductor terminal 26 ... outer conductor terminal 28 ... dielectric 30 ... shield conductor crimping part 32 ... Sheath material crimping part 40 ... biting piece 42 ... tip part 44 ... braid stop part

Claims (5)

  Around the signal conductor, a shield conductor made of a braid of a plurality of fine metal wires braided in a net shape through an insulator is covered, and the outer periphery of the shield conductor is covered with an insulating sheath material. An inner conductor terminal is connected, the inner conductor terminal is accommodated in the outer conductor terminal via a dielectric, and the shield conductor and the sheath material are respectively connected by the shield conductor crimping portion and the sheath material crimping portion of the outer conductor terminal. In the shielded connector fixed by crimping, a sleeve member is inserted between the insulator and the sheath material of the end portion of the shielded wire, and the sleeve member is mounted around the insulator. A plurality of biting pieces are formed at a predetermined interval in the circumferential direction on one side edge of the sleeve cylindrical portion, and the shield conductors are pressed by the respective biting pieces. Shield connector which is characterized.   2. Each of the biting pieces of the sleeve member is formed in a tapered shape, and a tip portion of the biting piece bites into the shield conductor to prevent the sleeve member from being pulled out. Shield connector as described in   The shield connector according to claim 1 or 2, wherein a tip portion of each biting piece of the sleeve member is processed into an acute angle shape.   4. A braided stop portion is formed at an edge of the sleeve cylinder of the sleeve member so as to be positioned between the biting pieces and prevent the end portion of the shield conductor from protruding. A shield connector according to any one of the above.   The biting piece of the sleeve member is inserted to the position of the shield conductor crimping portion of the outer conductor terminal, and is crimped from above the biting piece. Shield connector as described.

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