JP2005209349A - Shield connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shield connector with reduced number of parts and man-hour for assembling, capable of enhancing shielding property. <P>SOLUTION: The shield connector is composed of a shield shell 3 having an opening 33 into which a shield cable 2 can be inserted, and a cable barrel 32 arranged adjacent to the opening 33, a circular cylinder-shaped ring part 41, and a sleeve 4 having a lid part 42 protrusively arranged at one end of the ring part 41 in flange-shape. The terminal part of the shield cable 2 is inserted into the opening 33, and the ring part 41 of the sleeve 4 is mounted to the terminal part of the shield cable 2. Afterwards, the ring part 41 of the sleeve 4 is inserted into the opening 33 of the shield shell 3 in a state of engaging the lid part 42 of the sleeve 4 with opening 33 of the shield shell 3, by sliding the shield shell 3, and the inserted ring part 41 of the sleeve 4 is assembled by press fitting the cable barrel 32. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shielded connector that is attached to the end of a shielded cable and is used to connect the shielded cables to each other or an electronic device, and more particularly, the assembly operation is easy or the portion of the part to be attached to the shielded cable. The present invention relates to a shield connector with improved electromagnetic shielding.

  In recent years, signal transmission systems for automobiles have become high-speed LANs, and signals to be transmitted have become higher in frequency. In order to obtain good transmission characteristics in high-frequency signal transmission, impedance matching of physical layers such as cables and connectors, crosstalk reduction, EMI countermeasures, and the like are important. And as the frequency of the signal to be transmitted increases, its importance increases.

  Generally, a shield connector for an in-vehicle system has a configuration in which an inner conductor terminal is covered with a shield shell. However, many shield shells are formed with an opening for inserting a jig for connecting the inner conductor terminal and the signal line of the shield cable. Since EMI characteristics are thought to be greatly affected by noise leakage from the opening, it is a problem to suppress radiation of noise from the opening.

  For this reason, for example, a configuration has been proposed in which a holding block is inserted from an opening formed in the shield shell, the signal line of the shield cable is crimped to the inner conductor terminal, and then a shield cover is attached to the opening. (See Patent Document 1). According to such a configuration, radiation noise can be suppressed by the shield cover attached to the opening.

  On the other hand, as a configuration for improving the reliability of the connection between the shield cable and the shield connector, the shield cable braid is inverted on the sleeve, and the inverted braid is caulked with a shield barrel provided in the shield shell. Configuration is used. According to this configuration, since the braid is held between the sleeve and the cable barrel, the connection reliability can be improved as compared with a configuration in which the braid is simply crimped.

JP-A-11-224723

  However, in order to improve the electromagnetic shielding effect and improve the mounting reliability, it is necessary to mount a shield cover and sleeve, which increases the number of parts, increases the number of assembly steps, and increases the manufacturing cost. Invite. Further, the conventional structure has a problem that a gap is generated between the shield shell and the shield cover, and a sufficient electromagnetic shielding effect cannot be obtained.

  In view of the above circumstances, the problem to be solved by the present invention is to provide a shielded connector that can reduce the number of components to be configured, can simplify the assembly work, or has a sufficient electromagnetic shielding effect.

  In order to solve the above-described problems, the present invention provides a shield connector that is attached to a terminal portion of a shielded cable in which a signal line for transmitting a signal is covered with a conductive braid and an insulating sheath. A shield shell provided with a cable barrel adjacent to an opening into which a cable can be inserted, and a sleeve having a lid projecting in a flange shape from one end of a ring-shaped ring portion, The end portion is inserted into the opening of the shield shell, the ring portion of the sleeve is attached to the end portion of the inserted shield cable, the ring portion of the sleeve is inserted into the opening of the shield shell, and the sleeve The cover is engaged with the opening of the shield shell, and the ring portion of the inserted sleeve is crimped by the cable barrel of the shield shell and assembled. It is an gist to be kicked.

  Here, the ring portion of the sleeve is mounted on the outer peripheral surface of the end portion of the shield cable, the braid of the shield cable is inverted on the outer peripheral surface of the ring portion of the sleeve, and the outer periphery of the inverted braid is It is desirable to crimp the cable barrel of the shield shell.

  Moreover, the ring part of the sleeve may be inserted inside the braid of the shield cable, and the cable barrel of the shield shell may be crimped from the outer peripheral surface of the braid.

  According to the present invention, the work of connecting the signal line of the shielded cable to the inner conductor terminal can be performed before the work of housing the dielectric housing containing the inner conductor terminal in the shield shell. Therefore, it is not necessary to form an opening for inserting a jig or the like for connecting the signal line to the inner conductor terminal in the shield shell. For this reason, a shield shell can be reduced in size and a shield connector itself can be reduced in size.

  Further, the ring portion of the sleeve engages with the opening of the shield shell, and the opening for inserting the shield cable provided in the shield shell can be closed without a gap. For this reason, the radiation noise from the connection part of a shielded cable and a shield connector can be suppressed.

  Furthermore, the lid portion of the sleeve according to the present invention also has a function as a conventional general shield cover. For this reason, in the conventional configuration, the sleeve and the shield cover are separate parts and need to be mounted separately, but the shield connector according to the present invention constitutes a shield connector because it is a single member. The number of members can be reduced, and the number of assembly operations can be reduced.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a shield connector according to the present embodiment. In the following, description will be given using a form applied to the female shield connector. Further, the shield connector according to the present embodiment may be abbreviated as “this connector”.

  The shielded cable 2 to which the connector 1 is attached has two signal lines 21 configured by covering a conductor with insulating endothelium. The signal line 21 is provided with a structure in which the braid 22 and the insulating jacket 23 are coaxially covered. As a result, the signal line 21 is electromagnetically shielded to prevent noise from radiating to the outside. The terminal portion of the shielded cable 2 has the signal line 21 protruded from the braid 22 by a predetermined length and the braid 22 is exposed from the jacket 23 by a predetermined length in order to attach the connector 1. .

  The connector 1 includes a shield shell 3 to be attached to the braid 22 of the shield cable 2 and a sleeve 4 to be attached on the insulating jacket 23 of the shield cable 2. Inside the shield shell 3, an inner conductor terminal 5 connected to the end of the signal line 21 and a dielectric housing 6 that accommodates and holds the inner conductor terminal 5 are disposed. As a result, the inner conductor terminal 5, the dielectric housing 6 and the terminal portion of the shield cable 2 are shielded by the shield shell 3 and the sleeve 4.

  The shield shell 3 is a member for shielding the inner conductor terminal 5, the dielectric housing 6, and the like, and has a portion that is formed in a rectangular tube shape with bent front and rear ends by bending a metal plate-like member (hereinafter referred to as “a square tube”). The portion formed in a rectangular tube shape is referred to as “square tube portion 31”.) A cable barrel 32 that holds and holds the braid 22 of the shield cable 2 is provided at one end of the rectangular tube portion 31 (hereinafter, the side on which the cable barrel 32 is provided is referred to as the rear end side of the shield shell 3). The rear end side of the rectangular tube portion 31 is provided with a standing wall-like shield piece 34 projecting from the end surface toward the axial center, and the opening 33 has a shape and dimension capable of inserting a ring portion 41 of the sleeve 4 described later. It is formed.

  The sleeve 4 includes a ring portion 41 that improves the reliability of connection with the shield cable 2 and a shield portion 42 that covers the opening 33 of the shield shell 3 and suppresses radiation noise. The sleeve 4 is made of a conductive material and is formed by cutting or bending. The ring portion 41 is a ring-shaped portion having open front and rear ends, and is formed to have an inner diameter through which the braid 22 or the jacket 23 exposed from the shield cable 2 can be inserted. The shield part 42 is a plate-like part that protrudes radially outward from one end of the ring part 41, and can be inserted into the rectangular tube part 31 of the shield shell 3, but is not inserted into the opening 33. It is formed in an impossible dimension shape.

  The inner conductor terminal 5 and the dielectric housing 6 have substantially the same configuration as that of a conventional general one. The inner conductor terminal 5 includes a fitting portion 51 for inserting a male inner conductor terminal (not shown) on the connection partner side, a signal line connection portion 52 for connecting the signal line 21, and a structure thereof. Is provided. The inner conductor terminal 5 is formed integrally by bending a metal plate-like member, the fitting portion 51 is formed in a substantially cylindrical shape, and the signal line connecting portion 21 is formed in a substantially “coil” with one side open. "Is formed in a cross-sectional shape of a letter.

  The dielectric housing 6 is for maintaining insulation between the inner conductor terminal 5 and the shield shell 3, and is integrally formed from a synthetic resin or the like having a predetermined dielectric constant. An inner conductor terminal accommodating chamber 61 is formed inside the dielectric housing 6. The inner conductor terminal accommodating chamber 61 includes a part formed in a through hole shape and a part formed in a groove shape with one side open. And the fitting part 51 of the inner conductor terminal 5 is accommodated in the site | part formed in a through-hole shape, and the signal wire connection part 52 is accommodated in the site | part formed in groove shape.

  The assembling operation of the connector 1 having such a configuration is as follows. FIG. 2 is a perspective view schematically showing a process of assembling the connector 1.

  First, as shown in FIG. 2A, the end portion of the shielded cable 2 is inserted through the opening 33 of the shield shell 3. Then, the sleeve 4 is attached to the end portion of the shielded cable 2, and the braid 22 is inverted on the outer surface of the ring portion 41 of the attached sleeve 4 as indicated by the arrow b. On the other hand, the inner conductor terminal 5 is accommodated in the inner conductor terminal accommodating chamber 61 of the dielectric housing 6.

  Next, as shown in FIG. 2 (b), the signal line 21 protruding from the end of the shielded cable 2 is pressed into the signal line connecting portion 52 of the inner conductor terminal 5 to connect the signal line 21 and the inner conductor terminal 5. To do.

  Then, as shown in FIG. 2C, the shield shell 3 on the shield cable 2 is slid in the direction of arrow a to house the dielectric housing 6 in the shield shell 3. At this time, the ring portion 41 of the sleeve 4 protrudes from the opening 33 of the shield shell 3 and is positioned on the cable barrel 32. Thereafter, as shown in FIG. 2 (d), the cable barrel 32 is caulked, and the inverted braid 22 is crimped and fixed onto the outer peripheral surface of the ring portion 41 of the sleeve 4.

  Here, since the shield part 42 of the sleeve 4 overlaps and engages with the shield piece 34 of the shield shell 3, the opening part 33 can be covered without a gap. For this reason, radiation noise can be suppressed.

  FIG. 3 is an exploded perspective view showing another example of the shield connector according to the present embodiment. FIG. 4 is an external perspective view schematically showing the assembling operation. The shield connector 1 ′ in the other embodiment is used by inserting the sleeve 4 ′ between the braid 22 and the signal line 21 of the shield cable 2. For this reason, the ring portion 41 ′ of the sleeve 4 ′ is formed with a diameter that can be inserted inside the braid 22, but other than this, including the configuration in which the shield portion 42 ′ is formed at the end of the sleeve 4 ′, The shield connector 1 has substantially the same configuration.

  FIG. 4 is a perspective view showing an assembling operation of the shield connector 1 ′ of another embodiment. In the assembly operation, the step of attaching the sleeve 4 to the end of the shield cable 2 and inverting the braid 22 on the outer peripheral surface of the ring portion 41 is different from the step of attaching the ring portion 41 ′ of the sleeve 4 ′ in other embodiments. Only the step of inserting the braid 22 is performed, and the other steps are the same.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to the embodiments, and various modifications can be made without departing from the spirit of the present invention. Needless to say.

  For example, in the above-described embodiment, the configuration applied to the female shield connector including the two inner conductor terminals is shown, but the present invention can be applied regardless of the female side or the male side. Moreover, the kind and number of inner conductor terminals can be appropriately changed according to the configuration of the shielded cable to be applied.

It is the disassembled perspective view which showed the disassembled state of the shield connector which concerns on this Embodiment. It is the external appearance perspective view which showed typically the assembly operation of the shield connector which concerns on this Embodiment. Here, (a) shows the state before connection to the signal line and the inner conductor terminal, (b) shows the subsequent state, (c) shows the state in which the dielectric housing is accommodated in the shield shell, (d) shows the state. The braid is crimped with a cable barrel. It is the disassembled perspective view which showed the decomposition | disassembly state of the shield connector of another Example. It is the external appearance perspective view which showed typically the assembly | attachment operation of the shield connector of another Example. Here, (a) shows the state before connection to the signal line and the inner conductor terminal, (b) shows the subsequent state, (c) shows the state in which the dielectric housing is accommodated in the shield shell, (d) shows the state. The braid is crimped with a cable barrel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield connector 2 Shield cable 3 Shield shell 4 Sleeve 5 Inner conductor terminal 6 Dielectric housing 21 Shield cable signal wire 22 Shield cable braid 23 Shield cable jacket 32 Cable barrel 33 Shield shell opening 41 Sleeve ring 42 Shield part of sleeve

Claims (3)

  A shield connector that is attached to a terminal portion of a shielded cable in which a signal line for transmitting a signal is covered with a conductive braid and an insulating jacket, and is provided adjacent to an opening into which the shielded cable can be inserted. A shield shell provided with a cable barrel; and a sleeve with a lid projecting in a flange shape from one end of a ring portion formed in a circular tube shape, and an end portion of the shield cable at an opening of the shield shell Insert the ring portion of the sleeve into the end portion of the inserted shielded cable, insert the ring portion of the sleeve into the opening portion of the shield shell, and engage the lid portion of the sleeve with the opening portion of the shield shell. The shield is characterized in that it is assembled by crimping the ring portion of the inserted sleeve through the cable barrel of the shield shell. Connector.   The ring portion of the sleeve is mounted on the outer peripheral surface of the end portion of the shield cable, the braid of the shield cable is inverted on the outer peripheral surface of the ring portion of the sleeve, and the shield shell is started from the outer peripheral surface of the inverted braid The shielded connector according to claim 1, wherein the cable barrel is crimped.   The shield connector according to claim 1, wherein the ring portion of the sleeve is inserted inside the braid of the shield cable, and the cable barrel of the shield shell is crimped from the outer peripheral surface of the braid.

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