JP7171293B2 - shield connector - Google Patents

Description

The present invention relates to shielded connectors.

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

For example, Patent Literature 1 discloses a terminal connection structure for a shielded wire. This terminal connection structure includes a shielded wire and a shielded terminal provided with an outer conductor terminal accommodating an inner conductor terminal with a dielectric interposed therebetween. At the end of the shielded wire, the core wire and the braided wire are exposed step by step, and the inner conductor terminal is crimped to the core wire. On the other hand, an underlying metal sleeve is interposed on the inner circumference of the end of the braided wire, and the barrel provided on the outer conductor terminal is crimped so as to wrap around the end of the braided wire. A plurality of holes are formed in the sleeve over the entire circumference. According to this configuration, the outer peripheral portion of the insulating inner layer bites into the hole of the sleeve, and the insulating outer layer is caught on the sleeve, thereby restricting the insulating inner layer from shrinking and retracting the end thereof.

JP 2014-137941 A

However, according to the method described in Patent Document 1, it is not possible to suppress the displacement with respect to the shield layer and the insulating outer cover, and there is a problem that the wire holding force is low.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shield connector having excellent wire holding force.

In order to solve such problems, a shield connector according to the present invention is a shield comprising a core wire, an insulating inner layer covering the core wire, a shield layer covering the insulating inner layer, and an insulating outer layer covering the outer periphery of the shield layer. It has an electric wire, a sleeve provided between an insulating inner coating and a shield layer, and an outer terminal having a first barrel for crimping and fixing the shield layer and a second barrel for crimping and fixing the insulating outer coating. In this case, the sleeve has a recessed portion that is recessed and thinned in a stepped manner on the outer peripheral surface of the sleeve, and has a recessed portion that forms a step due to a difference in thickness from the portion other than the recessed portion, A first through hole is formed in the depressed portion of the recess so as to pass through the inside and outside of the sleeve. With the recess covered by the insulating skin, the insulating skin on the recess is crimped and fixed by the second barrel. The width is narrower than the width of the recess .
Another shield connector according to the present invention includes a shielded wire comprising a core wire, an insulating inner sheath covering the core wire, a shield layer covering the insulating inner sheath, and an insulating sheath covering the outer circumference of the shield layer, and an insulating The outer terminal includes a sleeve provided between the inner skin and the shield layer, a first barrel for crimping and fixing the shield layer, and a second barrel for crimping and fixing the insulating outer skin. In this case, the sleeve has a recessed portion that is recessed and thinned in a stepped manner on the outer peripheral surface of the sleeve, and has a recessed portion that forms a step due to a difference in thickness from the portion other than the recessed portion, The concave portion has a step formed by a pair of folded pieces provided at both ends of the sleeve and folded back so as to be in contact with the outer peripheral surface of the sleeve. A recessed portion of the concave portion is formed with a first through hole penetrating the inside and outside of the sleeve. With the recess covered by the insulating skin, the second barrel crimps and fixes the insulating skin on the recess.

Here, in the present invention, the sleeve has a second through-hole that is provided in a recess-free region and penetrates inside and outside, and the shield layer is formed in the recess when the first barrel and the second barrel are crimped. preferably bites into the first through hole of the depressed portion and the second through hole of the non-formed region of the recess .

Further, in the present invention, it is preferable that the concave portion is formed with a step by a pair of folded pieces provided at both ends of the sleeve and folded back so as to come into contact with the outer peripheral surface of the sleeve.
Another shield connector according to the present invention includes a shielded wire comprising a core wire, an insulating inner sheath covering the core wire, a shield layer covering the insulating inner sheath, and an insulating sheath covering the outer circumference of the shield layer, and an insulating The outer terminal includes a sleeve provided between the inner skin and the shield layer, a first barrel for crimping and fixing the shield layer, and a second barrel for crimping and fixing the insulating outer skin. In this case, the sleeve has a concave portion forming a step due to the difference in thickness on the outer peripheral surface of the sleeve. A stepped portion is formed by the folded piece, and the insulating outer skin on the recess is crimped and fixed by the second barrel in a state where the recess is covered with the insulating outer skin.

According to the shield connector of the present invention, it is possible to improve the wire holding force.

Explanatory drawing showing the shield connector according to the present embodiment Explanatory drawing showing the structure of the sleeve Explanatory drawing showing the manufacturing process of the shield connector Explanatory drawing showing a modification of the sleeve

The shield connector 1 according to this embodiment will be described below. Here, FIG. 1 is an explanatory diagram showing the shield connector 1 according to the present embodiment, and for convenience of explanation, the main components are shown in cross section (the same applies to FIG. 3, which will be described later). A shield connector 1 according to the present embodiment is for transmitting high-frequency electrical signals by electrically connecting via shield wires 3 to control units of various electrical components mounted in an automobile or the like.

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

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

Inner terminals 5, which will be described later, are arranged inside the outer terminals 7 accommodated in the connector housing. A connection terminal of the mating connector is electrically connected to the inner terminal 5 by being inserted into the space through an opening provided in the connector housing.

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

The shielded wire 3 includes a core wire 31 that is a conductor, an insulator (insulating inner coat) 32 that covers the outer circumference of the core wire 31, a braided wire 33 that covers the outer circumference of the insulator 32, and an outer circumference of the braided wire 33 that is covered with insulation. It is composed of a sheath (insulating outer covering) 34 .

Here, the braided wire 33 is made by braiding conductive strands. The braided wire 33 is formed in a tubular shape having a diameter matching the outer diameter of the insulator 32 . The braided wire 33 is a shield layer that provides electromagnetic shielding, and is provided along the longitudinal direction of the core wire 31 in substantially the entire area or in a required area. A known metal wire can be used as the conductive wire.

At the end of the shielded wire 3, the insulator 32, the braided wire 33, and the sheath 34 are stripped in a predetermined range from the end, and the core wire 31 is exposed. At this time, the outermost sheath 34 is stripped over a wider area than the insulator 32 and the braided wire 33, and the braided wire 33 is also exposed.

FIG. 2 is an explanatory diagram showing the structure of the sleeve 4. As shown in FIG. In the figure, (a) is a side view of the sleeve 4, (b) is a sectional view of the sleeve 4, and (c) is a front view of the sleeve 4. As shown in FIG. The sleeve 4 is provided between the insulator 32 and the braided wire 33 . The sleeve 4 is made of metal, such as stainless steel, and has a cylindrical shape fitted around the outer periphery of the insulator 32 . The sleeve 4 is sized to span both the area where the braided wire 33 is exposed and the area covered by the sheath 34 .

The sleeve 4 has, on its outer peripheral surface 40a, a concave portion 41 that forms a step due to a difference in thickness. Specifically, as shown in FIG. 2, the outer peripheral surface 40a of the sleeve 4 is provided with a recessed portion 42 which is formed by recessing the outer peripheral surface 40a inward and thinning the outer peripheral surface 40a in a stepped manner. The thickness Tss of the sleeve 4 at the recessed portion 42 is set to be thinner than the thickness Tst of the general portion of the sleeve 4 (the portion excluding the recessed portion 42). That is, the depression 42 forms a recess 41 as a step having a different thickness on the outer peripheral surface 40 a of the sleeve 4 .

The recess 41 is provided, for example, over the entire circumference of the sleeve 4 . However, it is not limited to the entire area in the circumferential direction, and may be intermittently provided in the circumferential direction. When the sleeve 4 is viewed with reference to the axial direction (corresponding to the extending direction of the core wire 31), the concave portion 41 is located in the inner region of the sleeve 4, that is, the region far from the end of the core wire 31 (the region on the right side in FIG. 2). ). The end of the sheath 34 that constitutes the shielded wire 3 reaches an intermediate position of the sleeve 4 , and the inner region of the sleeve 4 including the recess 41 is covered with the sheath 34 .

A plurality of through holes 45 are formed in the sleeve 4 along the circumferential direction. Each through hole 45 has a rectangular shape that extends horizontally along the axial direction of the sleeve 4 . A plurality of through holes 45 provided in the circumferential direction are arranged at a plurality of locations along the axial direction of the sleeve 4 . In the example shown in FIG. 2, there are provided two locations in total, one in the terminal side region of the sleeve 4 corresponding to the terminal side of the core wire 31 (the left region in FIG. 2) and one in the inner side region of the sleeve 4. there is Of these, in the inner region of the sleeve 4 , it is provided in the formation region of the concave portion 41 .

Note that the through holes 45 are not limited to being provided according to the regularity described above. The through-holes 45 may be provided in the region where the recess 41 is formed and the general portion of the sleeve 4 (the region where the recess 41 is not formed), respectively, or may be provided discretely throughout the sleeve 4 .

The inner terminal 5 is crimped to the end of the core wire 31 exposed by stripping the insulator 32 and the braided wire 33 . The inner terminal 5 is a female terminal, and has a cylindrical connecting portion 51 to which a male terminal (connecting terminal) of a mating connector is connected, and a crimping portion 52 to which the core wire 31 is crimped.

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.

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

The outer terminal 7 has a terminal 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 body 71 has a cylindrical shape corresponding to the outer shell of the inner housing 6, and the inner housing 6 is locked at a predetermined position inside the cylindrical shape.

The first barrel 72 crimps and fixes the braided wire 33 of the shielded wire 3 . A bottom wall 71a of the terminal body 71 extends along the extending direction of the core wire 31, and the first barrel 72 is composed of a pair of barrel pieces 72a provided to stand from both sides of the bottom wall 71a. ing. This first barrel 72 is set at a position corresponding to the through hole 45 in the terminal side region of the sleeve 4 . The pair of barrel pieces 72a are crimped around the braided wire 33 to hold the braided wire 33 and the sleeve 4 by crimping.

The second barrel 73 crimps and fixes the sheath 34 of the shielded wire 3 . Like the first barrel 72 , the second barrel 73 is composed of a pair of barrel pieces 73 a erected from both sides of a bottom wall 71 a extending along the core wire 31 . The pair of barrel pieces 73a are crimped around the sheath 34 so as to hold the sheath 34 and the braided wire 33 under the sheath 34 and the sleeve 4 by crimping.

The second barrel 73 is set at a position corresponding to the recess 41 formed in the outer peripheral surface 40 a of the sleeve 4 . That is, the crimping by the second barrel 73 is performed particularly in the recessed portion 41 of the outer peripheral surface 40 a of the sleeve 4 . In addition, the width of the barrel piece 73a (dimension in the direction in which the core wire 31 extends (the same shall apply hereinafter)) is set to be narrower than the width of the recess 41, and when it is crimped, the width of the barrel piece 73a extends into the recess 41. can enter. Therefore, the braided wire 33 and the sheath 34 on the recess 41 are crimped and fixed inside the recess 41 by crimping the second barrel 73 .

A method of manufacturing the shield connector 1 according to this embodiment will be described below. Here, FIG. 3 is an explanatory view showing the manufacturing method of the shield connector 1. As shown in FIG.

First, in the first step, the sheath 34 is stripped from the end of the core wire 31 over the first section D1, and then the insulator 32 and the braided wire 33 are removed from the end of the core wire 31 over the second section D2. (Fig. 3(a)). Here, the first section D1 is set larger than the second section D2. The first section D<b>1 is set so that the end of the sheath 34 is positioned closer to the end of the core wire 31 than the recess 41 of the sleeve 4 when the sleeve 4 is attached to the shielded wire 3 .

In the second step, the sleeve 4 is attached to the shielded wire 3 (FIG. 3(b)). Mounting of the sleeve 4 is performed by inserting the sleeve 4 between the insulator 32 and the braided wire 33 . When inserting the sleeve 4 , the end of the braided wire 33 is once folded back, the sleeve 4 is fitted onto the insulator 32 , and then the folded end of the braided wire 33 is returned to its initial state along the sleeve 4 .

In this second step, the sleeve 4 is inserted between the insulator 32 and the braided wire 33 from the end of the inner region where the recess 41 is formed. Then, the sleeve 4 is inserted to a position where the concave portion 41 provided on the outer peripheral surface 40 a of the sleeve 4 is on the inner side of the end of the braided wire 33 .

In the third step, the inner terminal 5 is connected to the end of the core wire 31 and the inner terminal 5 is housed in the inner housing 6 . Then, while housing the inner housing 6 in the outer terminal 7, the outer terminal 7 is connected to the braided wire 33 exposed by peeling the first section D1 of the sheath 34 (FIG. 3(c)).

Specifically, the pair of barrel pieces 72 a of the first barrel 72 are crimped to crimp and fix the braided wire 33 to the first barrel 72 . Thereby, the first barrel 72 holds the braided wire 33 on the outer peripheral surface 40 a of the sleeve 4 . Similarly, the pair of barrel pieces 73a of the second barrel 73 are crimped to fix the sheath 34 by crimping. Thereby, the second barrel 73 holds the sheath 34 and the braided wire 33 inside thereof inside the recess 41 of the sleeve 4 .

A plurality of through holes 45 are formed in the sleeve 4 . Therefore, the braided wire 33 is in a state of being bitten into the through hole 45 by crimping the first barrel 72 and the second barrel 73 .

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

Thus, the shield connector 1 according to this embodiment includes the shield wire 3, the sleeve 4 provided between the insulator 32 of the shield wire 3 and the braided wire 33, and the first barrel 72 for crimping and fixing the braided wire 33. and an outer terminal 7 having a second barrel 73 to which the sheath 34 is crimped and fixed. Here, the sleeve 4 has a recess 41 forming a step due to a difference in thickness on the outer peripheral surface 40 a of the sleeve 4 . An upper sheath 34 is crimped and secured.

According to this configuration, the second barrel 73 holds the sheath 34 and the underlying braided wire 33 inside the recess 41 of the sleeve 4 . As a result, the braided wire 33 and the sheath 34 are caught in the recessed portion 41 of the sleeve 4 under the crimping force of the second barrel 73, so that the braided wire 33 and the sheath 34 can be reliably held. Therefore, it is possible to increase the wire holding force.

Further, in the present embodiment, the sleeve 4 has through holes 45 that are provided in the region where the recess 41 is formed and the region where the recess 41 is not formed, and penetrate inside and outside. In this case, the braided wire 33 is in a state of biting into the through-hole 45 by crimping the first barrel 72 and the second barrel 73 .

According to this configuration, the braided wire 33 bites into the through hole 45 , so the braided wire 33 is caught in the through hole 45 . Therefore, the braided wire 33 can be reliably held, and the wire holding force can be increased.

Further, in the present embodiment, the width of the barrel piece 73 a that constitutes the second barrel 73 is set narrower than the width of the recess 41 .

According to this configuration, the barrel piece 72 a can enter into the recess 41 . Thereby, the braided wire 33 and the sheath 34 on the recess 41 can be securely crimped and fixed inside the recess 41 . Therefore, the braided wire 33 can be reliably held, and the wire holding force can be increased.

In this embodiment, the stepped portion of the recess 41 is formed by a recessed portion 42 formed by recessing the outer peripheral surface 40a of the sleeve 4 and thinning it stepwise. However, the concave portion 41 is not limited to this form as long as it forms a step due to a difference in thickness.

FIG. 4 is an explanatory diagram showing the structure of the sleeve 4 according to the modification. In the figure, (a) is a side view of the sleeve 4, (b) is a sectional view of the sleeve 4, and (c) is a front view of the sleeve 4. As shown in FIG. The sleeve 4 according to this modification differs from that shown in FIG. 2 in the structure of the recess 41 .

Specifically, the sleeve 4 has a pair of folded pieces 43a and 43b at both ends. The pair of folded pieces 43a and 43b are formed by bending portions extending outward from both ends of the sleeve 4 and folding them back so as to come into contact with the outer peripheral surface 40a of the sleeve 4. As shown in FIG. A pair of folded pieces 43 a and 43 b are provided in a plurality in the circumferential direction of the sleeve 4 .

As shown in FIG. 4, on the outer surface 40a of the sleeve 4, the pair of folded pieces 43a and 43b are thicker than the general portion of the sleeve 4 (the portion excluding the pair of folded pieces 43a and 43b). That is, the thickness of the sleeve 4 is increased by the amount of the folded pieces 43a and 43b at the portion where the pair of folded pieces 43a and 43b are present. That is, the thickness Tsc of the sleeve 4 at the folded pieces 43a and 43b is larger than the thickness Tst of the general portion of the sleeve 4. As shown in FIG. Accordingly, the pair of folded-back pieces 43a and 43b form a recessed portion 41 as a step having a different thickness on the outer peripheral surface 40a of the sleeve 4. As shown in FIG. In this embodiment, "thickness" refers to the distance from the inner peripheral surface 40b of the sleeve 4 to the portion forming the outer shell of the sleeve 4, and is not limited to the plate thickness of the material.

Even with such a configuration, the second barrel 73 holds the braided wire 33 and the sheath 34 inside the recess 41 of the sleeve 4 . As a result, the braided wire 33 and the sheath 34 are caught in the recessed portion 41 of the sleeve 4 under the crimping force of the second barrel 73, so that the braided wire 33 and the sheath 34 can be reliably held. As a result, the wire holding force can be increased.

Although the embodiments according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and modifications may be made within the scope of the present invention.

For example, in the present embodiment, the core wire is composed of a single strand, but a twisted strand of a plurality of strands may also be used. In addition to the metal wires, the conductive wires that make up the braided wire may also be mesh wires, etc., which are obtained by spirally winding wires of resin such as polyester that have been plated with Cu (copper). can be done. The type of conductive wire is not particularly limited as long as it has shielding performance. Additionally, although a braided wire is used as the shield layer, a metal foil may be used.

Reference Signs List 1 shield connector 2 electric wire with terminal 3 shield electric wire 4 sleeve 5 inner terminal 6 inner housing 7 outer terminal 31 core wire 32 insulator 33 braided wire 34 sheath 40a outer peripheral surface 40b inner peripheral surface 41 concave portion 42 depressed portion 43a folded piece 43b folded piece 45 Through hole 51 Connecting portion 52 Crimping portion 61 Terminal accommodating portion 71 Terminal body 71a Bottom wall 72 First barrel 72a Barrel piece 73 Second barrel 73a Barrel piece D1 First section D2 Second section

Claims (4)

A shielded wire comprising a core wire, an insulating inner sheath covering the periphery of the core wire, a shield layer covering the periphery of the insulating inner sheath, and an insulating outer sheath covering the outer periphery of the shield layer;
a sleeve provided between the insulating inner skin and the shield layer;
an outer terminal comprising a first barrel for crimping and fixing the shield layer, and a second barrel for crimping and fixing the insulating outer skin;
The sleeve has a depressed portion that is recessed and thinned in a stepped manner on the outer peripheral surface of the sleeve, and has a recessed portion that forms a step due to a difference in thickness from a portion other than the depressed portion,
A first through hole penetrating inside and outside of the sleeve is formed in the depressed portion of the recess,
With the recess covered by the insulating skin, the insulating skin on the recess is crimped and fixed by the second barrel ,
The width of the second barrel is narrower than the width of the recess.
shielded connector. A shielded wire comprising a core wire, an insulating inner coating covering the periphery of the core wire, a shield layer covering the periphery of the insulating inner coating, and an insulating outer coating covering the outer periphery of the shield layer;
a sleeve provided between the insulating inner skin and the shield layer;
an outer terminal comprising a first barrel for crimping and fixing the shield layer, and a second barrel for crimping and fixing the insulating outer skin;
The sleeve has a recessed portion that is recessed and thinned in a stepped manner on the outer peripheral surface of the sleeve, and has a recessed portion that forms a step due to a difference in thickness from a portion other than the recessed portion,
The recess has a step formed by a pair of folded pieces provided at both ends of the sleeve and folded back so as to come into contact with the outer peripheral surface of the sleeve,
A first through hole penetrating inside and outside of the sleeve is formed in the depressed portion of the recess,
A shield connector in which the insulating skin on the recess is crimped and fixed by the second barrel while the recess is covered with the insulating skin. The sleeve has a second through-hole provided in a region where the recess is not formed and penetrating inside and outside,
The shield layer bites into the first through hole of the depressed portion of the recess and the second through hole of the non-formation region of the recess in a state where the first barrel and the second barrel are crimped. 3. A shielded connector according to claim 1 or claim 2 . A shielded wire comprising a core wire, an insulating inner coating covering the periphery of the core wire, a shield layer covering the periphery of the insulating inner coating, and an insulating outer coating covering the outer periphery of the shield layer;
a sleeve provided between the insulating inner skin and the shield layer;
an outer terminal comprising a first barrel for crimping and fixing the shield layer, and a second barrel for crimping and fixing the insulating outer skin;
The sleeve has a concave portion that forms a step due to a difference in thickness on the outer peripheral surface of the sleeve,
The recess has a step formed by a pair of folded pieces provided at both ends of the sleeve and folded back so as to come into contact with the outer peripheral surface of the sleeve,
A shield connector in which the insulating skin on the recess is crimped and fixed by the second barrel while the recess is covered with the insulating skin.

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