JP2011090958A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for securing high shielding performance. <P>SOLUTION: A contact 11 is connected to a center conductor 21 of a coaxial cable 20, the contact 11 is held by a housing 12, and the housing 12 is held by a conductive shell 13. A sleeve 14 mounted on the coaxial cable 20 is inserted into the shell 13, and a pushing member 15 pushes the front end of braiding 23 of the coaxial cable 20 against the inner face of the shell 13 via the sleeve 14. A recessed portion 141 is formed in the outer peripheral face of the sleeve 14 to store the front end of the braiding 23, and the front end of the braiding 23 is fixed to the recessed portion 141 with an adhesive tape 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connector.

  Conventionally, connected to a braided shielded electric wire (cable) having a conductor (inner conductor), an insulating layer covering the conductor, a braided shield covering the insulating layer (outer conductor), and a sheath covering the braided shield A braided shielded wire connector is known (see Patent Document 1 below).

  This connector has a center contact, an insulating sleeve (housing), a main body (shell), a connecting portion, a clamp (sleeve), a gasket, a washer (washer), and a fastener (pressing member).

  The main body has conductivity and is substantially cylindrical. An annular rib is formed on the inner peripheral surface of the central portion of the main body. An insulating sleeve is accommodated in the front portion of the main body. The connecting portion is substantially cylindrical and is rotatably attached to the tip of the main body. The clamp is substantially cylindrical and is attached to one end of the braided shielded electric wire. The front end surface and the outer peripheral surface of the clamp are covered with the folded portion of the braided shield. The gasket is attached to one end of the braided shielded electric wire and is disposed adjacent to the rear of the clamp. A washer is attached to one end of the braided shielded electric wire and is disposed adjacent to the rear of the gasket. The fastener is attached to one end of the braided shielded electric wire and is disposed adjacent to the rear of the washer.

  A clamp, a gasket, and a washer are accommodated in the rear part of the main body together with one end part of the braided shield electric wire. The front end of the fastener is screwed into the female thread at the rear of the main body, and the clamp, gasket and washer are fixed in the main body.

  In order to connect the braided shielded wire connector to the braided shielded wire, first, the conductor and the braided shield are exposed by cutting off the insulating layer and the sheath at one end of the braided shielded wire.

  Next, these are attached to one end of the braided shielded electric wire in the order of a fastener, a washer, a gasket, and a clamp.

  Thereafter, the conductor is soldered to the center contact.

  Next, the front end portion of the braided shield is folded back, and the front end surface and the outer peripheral surface of the clamp are covered with the folded portion.

  Thereafter, one end of the braided shielded electric wire is inserted into the main body. At this time, the rear end portion of the center contact is held by the insulating sleeve, and the clamp, gasket and washer are accommodated in the rear portion of the main body.

  Finally, screw the tip of the fastener into the female screw on the body. As a result, the braided shield is pressed against the rib of the main body, and the braided shielded wire connector is connected to the braided shielded wire.

Japanese Unexamined Patent Publication No. 2000-311752 (see paragraphs 0002 to 0006, FIGS. 6 and 7)

  In the above-mentioned connector, when connecting the braided shielded cable to the braided shielded cable, the outer diameter of the folded part of the braided shielded cable is simply the inner diameter of the rear part of the main body. In some cases, the folded portion of the braided shielded wire is inserted into the rear portion of the main body together with the clamp.

  As a result, the folded portion of the braided shield is scattered, and a dense portion of the stitch and a loose portion of the stitch are formed on the braided shield. A current easily flows through a part of the main body that is in contact with the dense part of the braided shield, and sufficient shielding properties are secured. On the other hand, the current hardly flows to another part of the main body that is in contact with the sparse part of the stitch of the braided shield, and the shielding performance is lowered. Therefore, it has been difficult to ensure high shielding performance as a whole.

  This invention is made | formed in view of such a situation, The subject is providing the connector which can ensure high shield property.

  In order to solve the above-mentioned problem, the connector according to the first aspect of the present invention is a contact connected to the inner conductor of a cable having at least one inner conductor, an insulator holding the inner conductor, and an outer conductor covering the insulator. A housing holding the contact, a conductive shell holding the housing, a sleeve mounted on the cable and inserted into the shell, and pressing the sleeve to contact the outer conductor. A pressing member that presses the contact portion against the inner surface of the shell, and a recess is formed on the outer peripheral surface of the sleeve to accommodate the tip of the outer conductor, and the tip of the outer conductor is fixed to the recess by a fixing means. It is characterized by being.

  A recess is formed in the outer peripheral surface of the sleeve to accommodate the tip of the outer conductor, and the tip of the outer conductor is fixed to the recess by a fixing means. Therefore, when the sleeve is inserted into the shell, the tip of the outer conductor is Is difficult to contact the inner surface of the shell, and the outer conductor is not easily separated.

  According to a second aspect of the present invention, in the connector according to the first aspect, a shell-side tapered surface that is inclined with respect to the insertion direction of the sleeve is formed on the inner peripheral surface of the shell, and the outer peripheral edge portion of the distal end surface of the sleeve Further, a sleeve side taper surface that contacts the shell side taper surface through the abutting portion of the outer conductor is formed.

  According to a third aspect of the present invention, in the connector according to the first or second aspect, an arc-shaped portion is formed on the inner peripheral edge portion of the distal end surface of the sleeve.

  According to a fourth aspect of the present invention, in the connector according to any one of the first to third aspects, the pressing member has a male screw portion that is formed on the shell and is screwed into the screw portion.

  According to a fifth aspect of the present invention, in the connector according to the fourth aspect, a washer is disposed between the rear end surface of the sleeve and the front end surface of the pressing member.

  The invention according to claim 6 is the connector according to any one of claims 1 to 5, wherein the pressing member presses the contact portion of the outer conductor against the inner surface of the shell via the sleeve. A gap is formed between the housing and the sleeve.

  A seventh aspect of the present invention is the connector according to any one of the first to sixth aspects, wherein the cable is a coaxial cable, the inner conductor is a central conductor, and the outer conductor is a braid. And

  According to this invention, it is possible to provide a connector that can ensure high shielding properties.

FIG. 1 is a perspective view of a connector according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the connector shown in FIG. FIG. 3 is a perspective view of the contact, sleeve and pressing member of the connector shown in FIG. 4 is a perspective view of the sleeve of the connector shown in FIG. FIG. 5 is a cross-sectional view of the sleeve shown in FIG.

  A connector according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the connector 10 is connected to a coaxial cable (cable) 20. The coaxial cable 20 includes a center conductor (inner conductor) 21, an insulator 22, a braid (outer conductor) 23, and a sheath 24. The insulator 22 covers the central conductor 21. The braid 23 covers the insulator 22. The sheath 24 covers the braid 23.

The connector 10 includes a contact 11, a housing 12, a shell 13, a sleeve 14, a pressing member 15, an adhesive tape (fixing member) 16, and a washer 17.
It is.

  The contact 11 includes a contact part 111, a holding part 112, and a terminal part 113. The contact portion 111 receives a pin contact of a mating connector (not shown) and contacts the pin contact so as to sandwich the pin contact. The holding part 112 connects the contact part 111 and the terminal part 113. The holding part 112 is held by the housing 12. The terminal portion 113 is substantially cylindrical and receives the center conductor 21 and is electrically connected to the center conductor 21 by soldering or crimping.

  The housing 12 has a substantially cylindrical shape and is formed of an insulating material (for example, resin). A center hole 121 is formed at the center of the housing 12. The contact 11 is accommodated in the front portion of the center hole 121. In addition, the rear portion of the center hole 121 (the left side in FIG. 2 is the front and the right side is the rear) receives the tip of the coaxial cable 20.

  The shell 13 is made of a conductive material (for example, metal) and has a substantially cylindrical shape. The shell 13 receives and holds the housing 12. The shell 13 accommodates the sleeve 14. A shell-side taper surface 131 a is formed on the inner surface of the center portion of the shell 13. An internal thread portion 131 b is formed on the inner surface of the rear portion of the shell 13.

  As shown in FIGS. 4 and 5, the sleeve 14 has a substantially cylindrical shape and is made of a conductive material (for example, metal). A concave portion 141 extending in the circumferential direction is formed on the outer peripheral surface of the sleeve 14. A sleeve side tapered surface 142 is formed on the outer peripheral edge of the distal end surface of the sleeve 14. An arcuate portion 143 is formed on the inner peripheral edge of the distal end surface of the sleeve 14.

  As shown in FIGS. 2 and 3, the sleeve 14 is attached to one end portion of the coaxial cable 20, and is covered with a braid 23 in which the distal end surface of the sleeve 14 and the concave portion 141 are folded back.

  The pressing member 15 is formed of a conductive material (for example, metal) and is attached to one end of the coaxial cable 20. The pressing member 15 is disposed adjacent to the rear of the sleeve 14. The pressing member 15 has a male screw portion 151 and a knob portion 152. The external thread 151 is screwed into the internal thread 131 b of the shell 13. The knob 152 is connected to the rear part of the external thread 151. A central hole 153 is formed at the center of the pressing member 15.

  As will be described later, in this embodiment, the pressing member 15 is screwed into the female thread portion 131b, and the abutting portion 25 of the braid 23 of the coaxial cable 20 becomes the shell-side tapered surface 131a of the shell 13 and the sleeve-side tapered surface of the sleeve 14. A structure in which a gap G is formed between the braid 23 and the housing 12 is adopted.

  The adhesive tape 16 is wound around the braid 23 accommodated in the recess 141 of the sleeve 14.

  The washer 17 has conductivity and is attached to one end of the coaxial cable 20. The washer 17 is interposed between the sleeve 14 and the pressing member 15.

  To connect the coaxial cable 20 to the connector 10, first, as shown in FIGS. 2 and 3, the sheath 24 at one end of the coaxial cable 20 is peeled to expose the tip of the braid 23, and the tip is folded back. Thus, the tip of the insulator 22 is exposed, and the tip of the insulator 22 is excised to expose the tip of the center conductor 21.

  Next, the front end portion of the center conductor 21 is inserted into the terminal portion 113 of the contact 11 and the terminal portion 113 is caulked. As a result, the center conductor 21 is connected to the contact 11.

  Thereafter, the folded braid 23 is returned to its original state, and the pressing member 15, washer 17 and sleeve 14 are attached to one end of the coaxial cable 20 in this order.

  Next, the leading end of the braid 23 is folded back again, and the adhesive tape 16 is wound around the braid 23 to fix the braid 23 to the recess 141. As a result, the braid 23 is accommodated in the recess 141 of the sleeve 14.

  Thereafter, the contact 11 is inserted into the center hole 121 of the housing 12. The contact 11 inserted into the center hole 121 is held by the housing 12.

  Next, the housing 12, the sleeve 14, and the washer 17 are inserted into the shell 13 together with one end of the coaxial cable 20. At this time, the distal end portion of the braid 23 is housed in the recess 141, so that it does not contact the inner peripheral surface of the shell 13.

  Finally, the male thread 151 of the pressing member 15 is screwed into the female thread 131 b of the shell 13. The pressing member 15 screwed into the shell 13 pushes the sleeve 14 toward the housing 12 via the washer 17. When the pressing member 15 is screwed in a predetermined amount, the sleeve-side tapered surface 142 of the sleeve 14 abuts against the shell-side tapered surface 131a of the shell 13 via the braid 23, and the braid 23 is pressed against the shell-side tapered surface 131a. Since the washer 17 is interposed between the sleeve 14 and the pressing member 15, the sleeve 14 is hardly swung by the rotation of the pressing member 15, and the sleeve 14 can be inserted smoothly.

  Since the distal end portion of the braid 23 of the coaxial cable 20 is accommodated in the concave portion 141 of the sleeve 14 and is further fixed to the concave portion 141 with the adhesive tape 16, the distal end portion of the braid 23 is inserted into the shell 13 when the sleeve 14 is inserted into the shell 13. Since it is difficult to contact the inner peripheral surface of 13, the braid 23 is not easily separated. In addition, if the front-end | tip part of the braid 23 is fixed to the recessed part 141 so that it may not protrude from the outer peripheral surface of the sleeve 14, the braid 23 will become difficult to disperse | distribute further.

  According to this embodiment, it is possible to prevent the braid 23 from being scattered during the operation of connecting the coaxial cable 20, and thus it is possible to ensure high shielding properties.

  Further, since the shell 13 has a shell-side tapered surface 131 a and the sleeve 14 has a sleeve-side tapered surface 142, the shell-side tapered surface 131 a and the sleeve-side tapered surface 142 reliably contact the braid 23 of the coaxial cable 20. The portion 25 can be sandwiched, and the contact stability between the shell 13 and the braid 23 can be ensured.

  Furthermore, since the arcuate portion 143 is formed on the sleeve 14 and the leading end portion of the folded braid 23 contacts the arcuate portion 143, damage to the braid 23 can be prevented.

  Further, since the pressing member 15 has the male screw portion 151 to be screwed into the female screw portion 131b of the shell 13, the braid 23 of the coaxial cable 20 can be strongly pressed against the shell side tapered surface 131a of the shell 13, and the braid 23 and the shell 13 can be ensured.

  Furthermore, since the washer 17 is interposed between the sleeve 14 and the pressing member 15, the sleeve 14 can be prevented from being swung around by the rotational force of the pressing member 15, and the braid 23 can be prevented from being loosened. Can do.

  Further, since a structure is formed in which a gap G is formed between the housing 12 and the braid 23 when the contact portion 25 of the braid 23 of the coaxial cable 20 is pressed against the shell-side tapered surface 131a, the pressing member 15 A pressing force is not applied to the housing 12, and the contact stability between the shell 13 and the braid 23 is ensured.

  The shell 13 of the connector 10 of the above-described embodiment has a shell-side taper surface 131a, and the sleeve 14 has a sleeve-side taper surface 142. Surfaces parallel to the radial direction (not shown) are formed, and these surfaces sandwich the braid 23 in the direction of the center line of the shell 13, or convex portions (not shown) extending in the circumferential direction on the outer peripheral surface of the sleeve 14. And the braid 23 may be sandwiched between the convex portion and the inner peripheral surface of the shell 13 in the radial direction of the shell 13. Furthermore, the sleeve-side tapered surface 142 may be replaced with an arcuate surface (not shown).

  Moreover, although the arc-shaped part 143 was formed in the inner peripheral part of the front end surface of the sleeve 14, an inclined surface may be sufficient and this may be abbreviate | omitted.

  In the connector 10 of the above-described embodiment, the pressing member 15 having the external thread 151 is used as the pressing member for pressing the braid 23 of the coaxial cable 20 against the shell-side tapered surface 131a of the shell 13. The configuration for pressing the 20 braids 23 against the inner surface of the shell 13 is not limited to the pressing member 15 having the external thread 151.

  In the connector 10 of the above-described embodiment, the washer 17 is disposed between the rear end surface of the sleeve 14 and the front end surface of the pressing member 15, but the washer 17 is not necessarily employed.

  In the connector 10 of the above-described embodiment, when the contact portion 25 of the braid 23 is pressed against the shell-side tapered surface 131a of the shell 13 via the sleeve 14, the braid 23 and the sleeve 14 are prevented from coming into contact with the housing 12. Although the gap G is formed between the braid 23 and the braid 23, the gap may not be provided between the sleeve 14 and the braid 23 as long as the sleeve 14 and the braid 23 are in light contact with each other.

  Moreover, although the connector 10 of the above-mentioned embodiment is for the coaxial cable 20, the connector of the present invention can be used as a connector for a cable having a plurality of internal conductors, and the external conductor is composed of other than the braid 23. It can also be used as a cable connector.

  In addition, although the terminal part 113 of the contact 11 of the connector 10 of the above-mentioned embodiment is connected to the conductor part 21 of the coaxial cable 20 by caulking, the terminal part of the contact 11 may be a terminal part of a soldering type or the like.

  In addition, although the adhesive tape 16 is used as the fixing member, the fixing member is not limited to the adhesive tape 16, and an adhesive, a conductive adhesive, solder, rubber band, or the like may be used.

DESCRIPTION OF SYMBOLS 10 Connector 11 Contact 12 Housing 13 Shell 131a Shell side taper surface 131b Female thread part 14 Sleeve 141 Recess 142 Sleeve side taper surface 143 Arc-shaped part 15 Pushing member 151 Male thread part 16 Adhesive tape (fixing member)
17 Washer 20 Coaxial cable (cable)
21 Center conductor (inner conductor)
22 Insulator 23 Braid (outer conductor)

Claims (7)

A contact connected to the inner conductor of the cable having at least one inner conductor, an insulator holding the inner conductor, and an outer conductor covering the inner conductor;
A housing for holding this contact;
A conductive shell holding the housing;
A sleeve attached to the cable and inserted into the shell;
A pressing member that presses the sleeve and presses the contact portion of the outer conductor against the inner surface of the shell;
A recess is formed on the outer peripheral surface of the sleeve to accommodate the tip of the outer conductor,
The front end of the outer conductor is fixed to the recess by a fixing means. A shell side taper surface that is inclined with respect to the insertion direction of the sleeve is formed on the inner peripheral surface of the shell,
2. The connector according to claim 1, wherein a sleeve-side tapered surface that contacts the shell-side tapered surface through the abutting portion of the outer conductor is formed at an outer peripheral edge portion of the distal end surface of the sleeve.   The connector according to claim 1, wherein an arcuate portion is formed at an inner peripheral edge portion of the distal end surface of the sleeve.   The connector according to claim 1, wherein the pressing member has a male screw portion that is formed in the shell and is screwed into the screw portion.   The connector according to claim 4, wherein a washer is disposed between a rear end surface of the sleeve and a front end surface of the pressing member.   The gap is formed between the housing and the sleeve when the pressing member presses the contact portion of the outer conductor against the inner surface of the shell through the sleeve. The connector according to any one of 5.   The connector according to claim 1, wherein the cable is a coaxial cable, the inner conductor is a central conductor, and the outer conductor is a braid.

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