JP2020021538A - Shield connector - Google Patents

Abstract

To provide a shield connector which allows improvement in shield performance and has excellent wire holding force.SOLUTION: A shield connector 1 comprises: a shield wire 3; a sleeve 4 provided between an insulator 32 and a braided wire 33; an inner terminal 5 which is crimped to a core wire 31 extending from a terminal of the insulator 32; an inner housing 6 for housing the inner terminal 5; and an outer terminal 7 which has a terminal body 71 for housing the inner housing 6, a first barrel 72 for crimping and fixing the braided wire 33, and a second barrel 73 for crimping and fixing a sheath 34. A terminal of the braided wire 33 extends from the terminal of the insulator 32 and is fitted to an outer periphery of the inner housing 6. At least one of the inner housing 6 or the outer terminal 7 has a holding part for holding the terminal of the braided wire 33 fitted to the outer periphery of the inner housing 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shield connector.

  2. Description of the Related Art Conventionally, a shielded electric wire in which the outside of an insulating endothelium covering a core wire is covered with a shield layer such as a braided wire or a metal foil in order to shield electric noise such as electromagnetic waves and static electricity is known. In this shielded electric wire, the outside of the shield layer is covered with an insulating sheath (insulating sheath). A shield connector is used for electrical connection of the shielded wires.

  For example, Patent Literature 1 discloses a terminal connection structure for a shielded electric wire. This terminal connection structure includes a shielded electric wire and a shield terminal provided with an outer conductor terminal that houses an inner conductor terminal with a dielectric material interposed therebetween. At the end of the shielded electric wire, the core wire and the braided wire are exposed stepwise, and the inner conductor terminal is crimped to the core wire. On the other hand, a metal sleeve serving as an underlay is interposed on the inner periphery of the end of the braided wire, and a barrel provided on the outer conductor terminal is crimped so as to wind around the end of the braided wire. Further, the outer conductor terminal connected to the braided wire has a structure in which a barrel for a shield layer and a barrel for a sheath are formed at a predetermined interval on a rear end side of a fitting cylindrical portion into which a dielectric is fitted. It has become.

  Further, for example, Patent Literature 2 also discloses a configuration similar to that of Patent Literature 1, in which a ferrule is externally fitted to the outer periphery of the shield layer, and the shield layer is folded back along the outer peripheral surface of the ferrule. I have. In this Patent Document 2, the second contact means connected to the shield layer has a mounting wing.

JP 2014-137941 A JP-A-2017-168440

  However, according to the technique disclosed in Patent Literature 1, since the fitting cylindrical portion and the shield layer barrel are separated, there is a disadvantage that the shielding performance is low. On the other hand, according to the method disclosed in Patent Literature 2, since the mounting wings are rounded to each other to be cylindrical, it is possible to obtain the shielding performance, but it is difficult to secure the electric wire holding force. .

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shielded connector having improved shielding performance and excellent electric wire holding power.

  In order to solve such a problem, a shielded connector according to the present invention provides a shield including a core wire, an insulating endothelium covering the periphery of the core wire, a shield layer covering the periphery of the insulating endothelium, and an insulating sheath covering an outer periphery of the shield layer. Housing the electric wire, the sleeve provided between the insulating endothelium and the shield layer, the inner terminal crimped to the terminal of the core wire extending beyond the terminal of the insulating endothelium, the inner housing for housing the inner terminal, and the inner housing And a first barrel for crimping and fixing the shield layer, and an outer terminal having a second barrel for crimping and fixing the insulating skin. Here, the terminal of the shield layer extends from the terminal of the insulating endothelium and is mounted on the outer periphery of the inner housing, and at least one of the inner housing and the outer terminal is the terminal of the shield layer mounted on the outer periphery of the inner housing. It has a holding part for holding.

  Here, in the present invention, the holding portion is preferably a holding groove provided on the outer peripheral surface of the inner housing and into which the terminal of the shield layer is press-fitted.

  Further, in the present invention, it is preferable that the holding portion is a holding piece that is provided on the terminal body and holds the terminal of the shield layer between the terminal body and the outer peripheral surface.

  ADVANTAGE OF THE INVENTION According to the shield connector of this invention, the improvement of an electric wire holding force can be aimed at with the improvement of a shield performance.

Explanatory drawing showing a shielded connector according to the present embodiment. Explanatory drawing showing a cross section along line AA shown in FIG. Perspective view showing the rear end of the terminal body Explanatory drawing showing the manufacturing method of the shielded connector Explanatory drawing showing the manufacturing method of the shielded connector

  Hereinafter, the shield connector 1 according to the present embodiment will be described. Here, FIG. 1 is an explanatory diagram showing the shielded connector 1 according to the present embodiment, and for convenience of explanation, a main configuration is illustrated in a cross-sectional state (the same applies to FIGS. 4 and 5 described later). . FIG. 2 is an explanatory diagram showing a cross section taken along line AA shown in FIG. The shield connector 1 according to the present embodiment is for transmitting a high-frequency electric signal by being electrically connected to a control unit of various electric components mounted on an automobile or the like via a shield wire 3.

  The shield connector 1 has a connector housing (not shown) and an electric wire 2 with a terminal.

  The connector housing is made of an insulating material such as a synthetic resin material, and an outer terminal 7 described later is accommodated in a required space provided in the connector housing.

  An inner terminal 5 described later is disposed inside the outer terminal 7 housed in the connector housing. The connection terminal of the mating connection connector is electrically connected to the inner terminal 5 by being inserted into a space through an opening provided in the connector housing.

  The terminal-equipped electric wire 2 has a shielded electric wire 3, a sleeve 4, an inner terminal 5, an inner housing 6, and an outer terminal 7.

  The shielded electric wire 3 includes a core wire 31 as a conductor, an insulator (insulating endothelium) 32 that insulates the outer periphery of the core wire 31, a braided wire 33 that covers the outer periphery of the insulator 32, and insulates the outer periphery of the braided wire 33. And a sheath (insulating skin) 34.

  Here, the braided wire 33 is formed by knitting a conductive element wire. The braided wire 33 is formed in a tubular shape having a diameter corresponding to the outer diameter of the insulator 32. The braided wire 33 is a shield layer for applying an electromagnetic wave shield, and is provided in substantially the entire area or a necessary area along the longitudinal direction of the core wire 31. As the conductive strand, a known metal strand can be used.

  The insulator 32 is removed from the end of the shielded electric wire 3 in a predetermined range from the end while the braided wire 33 is left, and the core 31 is exposed inside the braided wire 33. An inner terminal 5 is crimped to a terminal of the core wire 31 extending from a terminal of the insulator 32.

  Further, the sheath 34 located at the outermost periphery is peeled over a wider range than the insulator 32, and the braided wire 33 is exposed. The end of the braided wire 33 extends from the end of the insulator 32 and is attached to the outer periphery of the inner housing 6.

  The sleeve 4 is provided between the insulator 32 and the braided wire 33. The sleeve 4 is made of metal, for example, stainless steel, and has a cylindrical shape fitted on the outer periphery of the insulator 32. The sleeve 4 is provided in an area where the sheath 34 is removed from around the braided wire 33.

  The sleeve 4 may have a structure in which a plurality of through holes penetrating inside and outside are provided in the circumferential direction of the sleeve 4. Further, the sleeve 4 may have such a length as to reach a range covered by the sheath 34.

  The inner terminal 5 is crimped to the end of the core 31 extending from the end of the insulator 32. The inner terminal 5 is a female terminal, and has a cylindrical connecting portion 51 to which a male terminal (connection terminal) of a mating connector is connected, and a crimping portion 52 to be crimped to the core wire 31.

  The inner housing 6 is made of an insulating resin material, and has a terminal accommodating portion 61 for accommodating the inner terminal 5 therein.

  A holding groove 62 is provided on the rear end side of the outer peripheral surface 60 of the inner housing 6. The holding groove 62 is a holding portion that holds the end of the braided wire 33 attached to the inner housing 6. In the holding groove 62, the gap of the groove is set according to the thickness of the braided wire 33, and the end of the braided wire 33 is press-fitted. The holding groove 62 is provided in the entire area of the outer peripheral surface 60 along the circumferential direction, but may be provided intermittently at a plurality of locations.

  The outer terminal 7 is a terminal that covers the outer periphery of the inner housing 6 and is connected to the braided wire 33 exposed by peeling the sheath 34 for a predetermined section. The outer terminal 7 is inserted into the space of the connector housing and locked by a locking structure. The outer terminal 7 is formed in a predetermined shape by subjecting a plate-shaped metal member to press working or the like.

  The outer terminal 7 has a terminal main body 71, a first barrel 72, and a second barrel 73.

  The terminal body 71 is a structure that covers the outer periphery of the inner housing 6. The terminal main body 71 has a cylindrical shape corresponding to the outer periphery of the inner housing 6, and the inner housing 6 is locked at a predetermined position inside the cylindrical shape.

  FIG. 3 is a perspective view showing a rear end portion 71b of the terminal main body 71. A pair of holding pieces 74 are provided at the rear end 71 b of the terminal body 71. Each holding piece 74 is provided so as to be continuous with the rear end portion 71b of the terminal main body 71, and a slit 75 is provided around the holding piece 74. The base end 74a of the holding piece 74 is connected to the rear end 71b of the terminal body 71, while the front end 74b is formed as a free end. Therefore, by pressing the holding piece 74 from the outside of the terminal body 71, the holding piece 74 can be bent inward. The bent holding piece 74 has a distal end 74 b close to the outer peripheral surface 60 of the inner housing 6, and clamps the end of the braided wire 33 with the outer peripheral surface 60 of the inner housing 6 (FIG. 2).

  The first barrel 72 presses and fixes the braided wire 33 covering the outer periphery of the sleeve 4. The bottom wall 71a of the terminal body 71 extends along the direction in which the core wire 31 extends, and the first barrel 72 is composed of a pair of barrel pieces 72a provided to stand up from both sides of the bottom wall 71a. ing. The first barrel 72 is provided at a position separated from the terminal main body 71 by a predetermined distance. The first barrel 72 is provided in a region where the braided wire 33 is exposed, corresponding to a region where the sleeve 4 is inserted. The pair of barrel pieces 72a are crimped so as to hold the periphery of the braided wire 33, and press-fit and fix the braided wire 33 and the sleeve 4. Further, the first barrel 72 composed of a pair of barrel pieces 72a electrically connects the braided wire 33 and the outer terminal 7.

  The second barrel 73 presses and fixes the sheath 34 of the shielded electric wire 3. The second barrel 73, like the first barrel 72, is composed of a pair of barrel pieces 73a provided so as to rise from both sides of a bottom wall 71a extending along the core wire 31. The second barrel 73 is set at a position corresponding to the sheath 34 that covers the braided wire 33. The pair of barrel pieces 73a are caulked so as to hold the periphery of the sheath 34, and fix the sheath 34, the braided wire 33 under the sheath 34, and the sleeve 4 by crimping.

  Hereinafter, a method for manufacturing the shield connector 1 according to the present embodiment will be described. Here, FIGS. 4 and 5 are explanatory diagrams illustrating a method of manufacturing the shielded connector 1. FIG.

  First, in the first step, the sheath 34 is peeled from the end of the core 31 over the first section D1, and then the insulator 32 is removed from the end of the core 31 over the second section D2 (FIG. 4 ( a)). Here, the first section D1 is set to be larger than the second section D2. In this state, the core wire 31 and the braided wire 33 extend forward from the ends of the insulator 32.

  In the second step, the sleeve 4 is attached to the shielded electric wire 3 (FIG. 4B). The mounting of the sleeve 4 is performed by inserting the sleeve 4 between the insulator 32 and the braided wire 33. When the sleeve 4 is inserted, the end of the braided wire 33 is once folded, the sleeve 4 is fitted over the insulator 32, and the folded end of the braided wire 33 is returned to the initial state along the sleeve 4.

  In the third step, the inner terminal 5 is crimped to the end of the core wire 31. Then, the inner terminal 5 is housed in the inner housing 6, and the terminal of the braided wire 33 is attached to the outer periphery of the inner housing 6. At this time, the end of the braided wire 33 is pressed into the holding groove 62 provided on the outer peripheral surface 60 of the inner housing 6. The ends of the braided wire 33 attached to the inner housing 6 are held by the holding grooves 62 (FIG. 4C).

  In the fourth step, the inner housing 6 is attached to the outer terminal 7. First, the inner housing 6 is housed in the terminal body 71 of the outer terminal 7. When the inner housing 6 is accommodated in the terminal body 71, the holding piece 74 of the terminal body 71 is pressed inward (FIG. 5A), and is pressed against the braided wire 33 attached to the outer peripheral surface 60 of the inner housing 6. Until the holding piece 74 is bent. The distal end portion 74b of the holding piece 74 in the bent state presses the braided wire 33, thereby clamping the end of the braided wire 33 between the distal end portion 74b and the outer peripheral surface 60 of the inner housing 6.

  Next, the first barrel 72 and the second barrel 73 of the outer terminal 7 are connected to the shielded electric wire 3 (FIG. 5B). Specifically, the pair of barrel pieces 72 a of the first barrel 72 are crimped, and the braided wire 33 is fixed by crimping with the first barrel 72. Thus, the first barrel 72 holds the braided wire 33, the sleeve 4, and the insulator 32. Similarly, the pair of barrel pieces 73a of the second barrel 73 are crimped, and the sheath 34 is fixed by crimping. Accordingly, the second barrel 73 holds the sheath 34, the braided wire 33, and the insulator 32.

  Then, in the fifth step, the outer terminal 7 is accommodated in a required space provided in the connector housing.

  As described above, the shielded connector 1 according to the present embodiment is crimped to the shielded wire 3, the sleeve 4 provided between the insulator 32 and the braided wire 33, and the core 31 extending from the end of the insulator 32. The inner terminal 5, an inner housing 6 that houses the inner terminal 5, a terminal body 71 that houses the inner housing 6, a first barrel 72 that presses and fixes the braided wire 33, and a second barrel 73 that presses and fixes the sheath 34. And an outer terminal 7 provided. Here, the terminal of the braided wire 33 extends from the terminal of the insulator 32 and is attached to the outer periphery of the inner housing 6. At least one of the inner housing 6 and the outer terminal 7 includes a holding portion that holds a terminal of the braided wire 33 attached to the outer periphery of the inner housing 6.

  According to this configuration, the end of the braided wire 33 extends to the inner housing 6 and is attached to the outer periphery thereof. Thereby, even if the terminal main body 71 and the first barrel 72 are separated, the braided wire 33 exists at the separated portion, so that good shielding performance can be obtained. Further, since the terminal of the braided wire 33 is held by the holding portion, the terminal of the braided wire 33 is prevented from dropping from the outer periphery of the inner housing 6. Thereby, good shielding performance can be obtained. Furthermore, the shielded electric wire 3 can be crimped and fixed by caulking the shielded electric wire 3 using the first barrel 72 and the second barrel 73. As a result, the electric wire holding force can be improved.

  In the present embodiment, the holding portion is a holding groove 62 provided on the outer peripheral surface 60 of the inner housing 6 and into which the end of the braided wire 33 is press-fitted.

  According to this configuration, the end of the braided wire 33 is pressed into the holding groove 62, so that the end of the braided wire 33 and the holding groove 62 are engaged. Thereby, the terminal of the braided wire 33 can be held. As a result, the terminal of the braided wire 33 is prevented from falling off from the outer periphery of the inner housing 6, so that good shielding performance can be obtained.

  In the present embodiment, the holding portion is a holding piece 74 that is provided on the terminal body 71 and holds the terminal of the braided wire 33 between the terminal body 71 and the outer peripheral surface 60 of the inner housing 6.

  According to this configuration, the end of the braided wire 33 attached to the outer periphery of the inner housing 6 can be held by the holding piece 74. As a result, the terminal of the braided wire 33 is prevented from falling off from the outer periphery of the inner housing 6, so that good shielding performance can be obtained.

  In the present embodiment, the structure (holding portion) for holding the terminal of the braided wire 33 attached to the outer periphery of the inner housing 6 includes the holding groove 62 of the inner housing 6 and the holding of the outer terminal 7 (terminal main body 71). And a piece 74. However, this holding structure may be realized only by the holding groove 62 of the inner housing 6, or may be realized only by the holding piece 74 of the outer terminal 7 (terminal body 71).

  For example, when the holding structure is realized only by the holding groove 62 of the inner housing 6, the holding piece 74 of the outer terminal 7 can be omitted.

  When the holding structure is realized only by the holding pieces 74 of the outer terminals 7, the holding grooves 62 of the inner housing 6 can be omitted. However, a groove corresponding to the width of the holding piece 74 (the length in the extending direction of the core wire 31) may be provided on the outer peripheral surface 60 of the inner housing 6 so as to correspond to the holding piece 74. This groove is for increasing the holding force of the holding piece 74, and differs from the above-described holding groove 62 in that it does not have a holding force itself.

  Although the embodiment according to the present invention has been described above, the present invention is not limited to the above-described embodiment, and may be modified within the scope of the present invention.

  For example, in the present embodiment, the core wire is constituted by a single strand, but a strand obtained by twisting a plurality of strands may be used. In addition, as the conductive element wire forming the braided wire, besides the metal element wire, a mesh element wire obtained by spirally winding an element wire obtained by plating a resin wire such as polyester with Cu (copper) plating is used. Can be. The type of the conductive strand is not particularly limited, and may be any as long as it has a shielding performance. In addition, although a braided wire is used as a shield layer, a metal foil may be used.

DESCRIPTION OF SYMBOLS 1 Shield connector 2 Electric wire with a terminal 3 Shield electric wire 31 Core wire 32 Insulator 33 Braided wire 34 Sheath 4 Sleeve 5 Inner terminal 51 Connection part 52 Crimp part 6 Inner housing 60 Outer peripheral surface 61 Terminal accommodating part 62 Holding groove 7 Outer terminal 71 Terminal body 71a Bottom wall 71b Rear end 72 First barrel 72a Barrel piece 73 Second barrel 73a Barrel piece 74 Holding piece 74a Base end 74b Tip end 75 Slit

Claims (3)

Core wire, an insulating sheath covering the periphery of the core wire, a shield layer covering the periphery of the insulating endothelium, and a shielded wire including an insulating sheath covering an outer periphery of the shield layer;
A sleeve provided between the insulating endothelium and the shield layer,
An inner terminal that is crimped to a terminal of the core wire extending from a terminal of the insulating endothelium,
An inner housing that houses the inner terminal,
An outer terminal including a terminal main body that accommodates the inner housing, a first barrel that press-fixes the shield layer, and a second barrel that press-fixes the insulating outer cover;
The terminal of the shield layer extends beyond the terminal of the insulating endothelium and is attached to the outer periphery of the inner housing,
At least one of the inner housing and the outer terminal is a shielded connector including a holding portion for holding a terminal of the shield layer mounted on an outer periphery of the inner housing. The shield connector according to claim 1, wherein the holding portion is a holding groove provided on an outer peripheral surface of the inner housing and into which an end of the shield layer is press-fitted. The shield connector according to claim 1, wherein the holding portion is a holding piece provided on the terminal main body and holding a terminal of the shield layer between the terminal body and an outer peripheral surface of the inner housing.

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