JP2021015701A - Shield connector - Google Patents

Abstract

To provide a shield connector capable of stably arranging an impedance adjusting member with respect to a shielded electric wire.SOLUTION: In a shield connector 1 including a shielded electric wire 11 having a shield member 9 whose outer circumference of a core wire 3 is covered with an insulator 5 and that covers the outer circumference of the insulator 5, a shield shell 13 that houses the terminal portion of the shielded wire 11 and is electrically connected to the shield member 9, and an impedance adjusting member 15 electrically connected to the shield shell 13 and arranged at the terminal portion of the shielded electric wire 11, the impedance adjusting member 15 is provided with an adjusting portion 17 arranged between the outer peripheral surface of the insulator 5 and the inner peripheral surface of the shield shell 13 and a crimping portion 19 to be crimped to the shielded electric wire 11.SELECTED DRAWING: Figure 3

Description

The present invention relates to a shielded connector. More specifically, the present invention relates to a shielded electric wire having a shielded member and a shielded connector having a shielded shell electrically connected to the shielded member.

Conventionally, as a shield connector, a shielded electric wire having a braided wire as a shield member in which the outer periphery of the core wire is covered with an insulating endothelial as an insulator and covering the outer periphery of the insulated endothelium, and a terminal portion of the shielded electric wire are accommodated and the braided wire is electrically charged. There is known one provided with a shield terminal as a shield shell to be specifically connected (see, for example, Patent Document 1).

In this shield connector, an air layer is interposed between the outer peripheral surface of the insulating endothelium and the inner peripheral surface of the shield terminal, but in order to improve transmission performance, the outer peripheral surface of the insulating endothelium and the inner peripheral surface of the shield terminal are interposed. It is preferable to improve the transmission performance by adjusting the dielectric constant between the two and the impedance.

Therefore, it is known that a sleeve as an impedance adjusting member electrically connected to a shield member as a shield shell is arranged at a terminal portion of a shielded electric wire (see, for example, Patent Document 2).

This sleeve is arranged by being exteriorized on the outer periphery of the terminal portion of the shielded electric wire, and is electrically connected to the shield member by fitting with the shield member.

Such a sleeve is provided with a small cylinder portion as an adjusting portion arranged between the outer peripheral surface of the insulating endothelium as an insulator of the shielded electric wire and the inner peripheral surface of the shield member. Impedance can be adjusted by changing the design such as the size of the cable.

Japanese Unexamined Patent Publication No. 2000-228252 JP 2015-79651

By the way, in the shield connector as in Patent Document 2, since the impedance adjusting member is only arranged by being exteriorized by the terminal portion of the shielded electric wire, the impedance adjusting member is arranged with respect to the insulator of the shielded electric wire. There was a risk that the adjusting unit would be misaligned.

Therefore, an object of the present invention is to provide a shielded connector capable of stably arranging an impedance adjusting member with respect to a shielded electric wire.

According to the first aspect of the present invention, a shielded electric wire having a shield member whose outer periphery of the core wire is covered with an insulator and covering the outer periphery of the insulator, and a terminal portion of the shielded electric wire are housed and electrically connected to the shield member. Shield shell, an impedance adjusting member electrically connected to the shield shell and arranged at the terminal portion of the shielded electric wire, an outer peripheral surface of the insulator provided on the impedance adjusting member, and an inner peripheral surface of the shield shell. The shield connector is characterized by having an adjusting portion arranged between the two, and a crimping portion provided on the impedance adjusting member and crimped to the shielded electric wire.

In this shield connector, the impedance adjusting member is provided with an adjusting portion arranged between the outer peripheral surface of the insulator and the inner peripheral surface of the shield shell. Therefore, by changing the design of the adjusting portion, the impedance can be adjusted. Adjustments can be made.

Further, since the impedance adjusting member is provided with a crimping portion that is crimped to the shielded electric wire, the impedance adjusting member can be stably fixed to the shielded electric wire, and the impedance with respect to the insulator of the shielded electric wire can be obtained. It is possible to prevent the adjusting portion of the adjusting member from being dislocated and arranged.

Therefore, in such a shield connector, the impedance adjusting member can be stably arranged with respect to the shielded electric wire by crimping the crimping portion of the impedance adjusting member to the shielded electric wire.

The invention according to claim 2 is the shield connector according to claim 1, wherein the crimping portion is a sheath that crimps a shield crimping piece that is crimped to the shield member and a sheath that covers the outer periphery of the shield member. It is characterized by having a crimping piece.

In this shield connector, since the crimping portion has a shield crimping piece that is crimped to the shield member and a sheath crimping piece that crimps the sheath that covers the outer periphery of the shield member, the shield crimping piece and the sheath crimping piece By crimping and to the shielded wire, the impedance adjusting member can be stably fixed to the shielded wire.

Further, by crimping the shield crimping piece to the shield member, the shield member and the impedance adjusting member are electrically connected, and the reliability of the electrical connection can be improved.

According to the present invention, it is possible to provide a shielded connector capable of stably arranging an impedance adjusting member with respect to a shielded electric wire.

It is a perspective view of the shield connector which concerns on embodiment of this invention. It is sectional drawing of the shield connector which concerns on embodiment of this invention. It is an enlarged view of the main part of FIG. FIG. 3 is a cross-sectional view taken along the line XX of FIG. It is an exploded perspective view of the shield connector which concerns on embodiment of this invention. It is a perspective view when the impedance adjustment member of the shield connector which concerns on embodiment of this invention is arranged in the shield electric wire. It is a perspective view when the impedance adjustment member of the shield connector which concerns on embodiment of this invention is arranged in the shield electric wire. It is a perspective view when the impedance adjustment member of the shield connector which concerns on embodiment of this invention is assembled to a shield electric wire. It is a side view of the terminal part of the shield electric wire of the shield connector which concerns on embodiment of this invention. It is a side view when the sheath is peeled off from the state of FIG. It is a side view when the metal sleeve is arranged from the state of FIG. It is a side view when the shield member is folded back from the state of FIG. It is a side view when the insulator is peeled off from the state of FIG. It is a side view when the terminal is connected from the state of FIG.

The shield connector according to the embodiment of the present invention will be described with reference to FIGS. 1 to 14.

The shield connector 1 according to the present embodiment includes a shielded electric wire 11 having a shield member 9 in which the outer periphery of the core wire 3 is covered with an insulator 5 and covers the outer periphery of the insulator 5, and a shield member in which the terminal portion of the shielded electric wire 11 is housed. A shield shell 13 electrically connected to 9 and an impedance adjusting member 15 electrically connected to the shield shell 13 and arranged at the terminal portion of the shielded electric wire 11 are provided.

The impedance adjusting member 15 is provided with an adjusting portion 17 arranged between the outer peripheral surface of the insulator 5 and the inner peripheral surface of the shield shell 13, and a crimping portion 19 crimped to the shielded electric wire 11. ing.

Further, the crimping portion 19 has a shield crimping piece 21 that is crimped to the shield member 9, and a sheath crimping piece 25 that crimps the sheath 23 that covers the outer periphery of the shield member 9.

As shown in FIGS. 1 to 14, the shield connector 1 includes a shielded electric wire 11, a terminal 27, an inner housing 29, a shield shell 13, an impedance adjusting member 15, and an outer housing 31.

The shielded electric wire 11 is a so-called coaxial electric wire provided with a core wire 3, an insulator 5, a shield member 9, and a sheath 23.

The outer circumference of the insulator 5 in the shielded electric wire 11 is covered with a shield member 9.

The shield member 9 is made of a braid formed by weaving a plurality of strands made of a conductive material, and is arranged so as to cover the outer periphery of the insulator 5.

The outer circumference of the shield member 9 is covered with a sheath 23.

The sheath 23 is made of an insulating material and is arranged so as to cover the outer periphery of the shield member 9.

As shown in FIG. 10, the shielded electric wire 11 configured in this way first peels off the sheath 23 by a predetermined length at the terminal portion.

Next, as shown in FIG. 11, an annular metal sleeve 33 is arranged on the outer periphery of the exposed shield member 9.

Next, as shown in FIG. 12, the shield member 9 exposed from the metal sleeve 33 is folded back toward the sheath 23 side so as to cover the metal sleeve 33.

Next, as shown in FIG. 13, the exposed insulator 5 is peeled off to a predetermined length to expose the core wire 3.

Next, as shown in FIG. 14, the terminal 27 is electrically connected to the exposed core wire 3 by crimping to the shielded electric wire 11 that has been subjected to the terminal treatment.

Then, the shield shell 13 is electrically connected to the shield member 9 exposed via the impedance adjusting member 15.

The terminal 27 is made of a conductive material and is a female terminal having a box-shaped connection portion.

The terminal 27 is electrically connected to the core wire 3 by crimping a crimping portion made of a crimping piece to the core wire 3.

The terminal 27 connected to the shielded electric wire 11 in this way is housed in the inner housing 29.

The inner housing 29 is made of an insulating material such as synthetic resin, is formed in a cylindrical shape so as to accommodate the terminal 27, and is provided with a locking means (not shown) for locking the terminal 27 inside.

The inner housing 29 is housed in the shield shell 13 and maintains the insulating property between the terminal 27 and the shield shell 13.

The shield shell 13 is made of a conductive material and is formed in a cylindrical shape so as to accommodate the inner housing 29.

Inside the shield shell 13, the inner housing 29 and the adjusting portion 17 of the impedance adjusting member 15 arranged at the terminal portion of the shielded electric wire 11 are housed.

In such a shield shell 13, the adjusting portion 17 of the impedance adjusting member 15 is inserted inside, and the impedance adjusting member 15 is electrically connected and fixed by the engaging means 18 provided between the adjusting portion 17 and the adjusting portion 17. Will be done.

The shield shell 13 electrically connected to the impedance adjusting member 15 in this way is electrically connected to the shield member 9 of the shielded electric wire 11 via the impedance adjusting member 15.

The impedance adjusting member 15 is made of a conductive material, is arranged at the terminal portion of the shielded electric wire 11, and includes an adjusting portion 17 and a crimping portion 19.

The adjusting portion 17 is formed in a cylindrical shape so that the insulator 5 exposed from the terminal portion of the shielded electric wire 11 can be inserted into the inside.

When the impedance adjusting member 15 is arranged in the terminal portion of the shielded electric wire 11 which has been subjected to the terminal treatment, the adjusting portion 17 is inserted with the insulator 5 of the shielded electric wire 11 and is connected to the outer circumference of the insulator 5. It is arranged with a gap 35 between them (see FIG. 4).

Such an adjusting portion 17 is housed inside the shield shell 13 in a state where the impedance adjusting member 15 is arranged at the terminal portion of the shielded electric wire 11, so that the outer peripheral surface of the insulator 5 and the inside of the shield shell 13 are accommodated. It is placed between the peripheral surface.

The crimping portion 19 includes a shield crimping piece 21 and a sheath crimping piece 25.

The shield crimping piece 21 is formed of a single member whose bottom wall side is continuous with the adjusting portion 17, and is extended in pairs from both sides of the bottom wall upward.

The shield crimping piece 21 is arranged on the outer periphery of the shield member 9 which is folded back and arranged on the shielded electric wire 11 in a state where the adjusting portion 17 is arranged on the outer periphery of the insulator 5 of the shielded electric wire 11 (see FIG. 7). ).

Such a shield crimping piece 21 is crimped to the shield member 9 of the shielded electric wire 11 by a jig (not shown) or the like, so that the impedance adjusting member 15 is electrically connected to the shield member 9 and the impedance adjusting member The shield shell 13 is electrically connected to the shield member 9 via 15.

In addition, the impedance adjusting member 15 is fixed to the shielded electric wire 11 by crimping the shield crimping piece 21 to the shield member 9 of the shielded electric wire 11.

The sheath crimping piece 25 is formed of a member whose bottom wall side is continuous with the bottom wall of the shield crimping piece 21, and is extended in pairs from both sides of the bottom wall upward.

The sheath crimping piece 25 is arranged on the outer periphery of the sheath 23 of the shielded electric wire 11 in a state where the adjusting portion 17 is arranged on the outer periphery of the insulator 5 of the shielded electric wire 11 (see FIG. 7).

The impedance adjusting member 15 is fixed to the shielded electric wire 11 by crimping the sheath crimping piece 25 to the sheath 23 of the shielded electric wire 11 with a jig (not shown) or the like.

By providing the crimping portion 19 on the impedance adjusting member 15 in this way, the impedance adjusting member 15 is firmly fixed to the shielded electric wire 11, and the adjusting portion 17 of the impedance adjusting member 15 is firmly fixed to the insulator 5 of the shielded electric wire 11. Does not shift in position.

The terminal 27 electrically connected to the core wire 3 of the shielded electric wire 11 in which the impedance adjusting member 15 is fixed to the terminal portion of the shielded electric wire 11 via the crimping portion 19 is housed in the inner housing 29.

The inner housing 29 accommodating the terminal 27 is accommodated in the shield shell 13, and the adjusting portion 17 of the impedance adjusting member 15 is inserted into the shield shell 13 and electrically connected and fixed by the engaging means 18. ..

By inserting the adjusting portion 17 of the impedance adjusting member 15 into the shield shell 13, the shield shell 13 is electrically connected to the shield member 9 of the shielded electric wire 11 via the impedance adjusting member 15.

The shield shell 13 electrically connected to the shield member 9 of the shielded electric wire 11 in this way is housed in the outer housing 31.

The outer housing 31 is made of an insulating material such as synthetic resin, is formed in a housing shape so as to accommodate the shield shell 13 and the impedance adjusting member 15, and is internally provided on a locking projection 37 on the shield shell 13. A locking lance 39 that is locked is provided.

The shield connector 1 having the outer housing 31 is fitted with the mating connector 41, the terminal 27 is electrically connected to the mating terminal 43, and the shield shell 13 is electrically connected to the conductive member 45.

The mating connector 41 is made of an insulating material such as synthetic resin, and has a mating terminal 43 formed of a male terminal having a tab-shaped connecting portion which is mounted on a substrate 47 and electrically connected to the substrate 47 by soldering. It is contained.

By fitting the mating connector 41 with the shield connector 1, the terminal 27 and the mating terminal 43 are electrically connected.

At this time, the shield shell 13 is electrically connected to the grounded conductive member 45 of the mating connector 41 to form a shield circuit.

By forming the shield circuit by the shield shell 13 in this way, it is possible to prevent leakage of noise and the like from the core wire 3 and intrusion of noise and the like into the core wire 3.

The outer housing 31 is provided with a bendable lock arm 49 for holding or releasing the mated state between the shield connector 1 and the mating connector 41.

In this lock arm 49, when the shield connector 1 and the mating connector 41 are fitted, the lock portion 51 engages with the locked portion 53 provided on the mating connector 41, and the shield connector 1 and the mating connector 41 Holds the mated state of.

On the other hand, the lock arm 49 is bent by pressing the operation portion 55 while the shield connector 1 and the mating connector 41 are fitted, and the lock portion 51 and the locked portion 53 are released from the engagement. The mated state between the shield connector 1 and the mating connector 41 can be released.

In such a shield connector 1, the dielectric constant between the outer peripheral surface of the core wire 3 of the shielded electric wire 11 and the inner peripheral surface of the shield shell 13 affects the impedance adjustment.

In order to improve the transmission performance of the shield connector 1, it is preferable to lower the impedance, and this reduction in impedance can be obtained by lowering the dielectric constant between the outer peripheral surface of the core wire 3 and the inner peripheral surface of the shield shell 13. ..

Therefore, as shown in FIG. 4, the adjusting portion 17 of the impedance adjusting member 15 electrically connected to the shield shell 13 is located between the outer peripheral surface of the insulator 5 of the shielded electric wire 11 and the inner peripheral surface of the shield shell 13. The adjusting portion 17 is arranged closer to the outer peripheral surface of the core wire 3 than the inner peripheral surface of the shield shell 13.

Therefore, the distance T1 between the outer peripheral surface of the core wire 3 and the inner peripheral surface of the adjusting portion 17 is shorter than the distance T2 between the outer peripheral surface of the core wire 3 and the inner peripheral surface of the shield shell 13.

By arranging the adjusting portion 17 in this way, the dielectric constant between the outer peripheral surface of the core wire 3 and the inner peripheral surface of the shield shell 13 can be lowered, and the impedance can be lowered to improve the transmission performance. it can.

When adjusting the impedance, for example, the gap 35 between the shielded electric wire 11 and the outer circumference of the insulator 5 may be adjusted by adjusting the inner diameter (thickness) of the adjusting portion 17.

In such a shield connector 1, the impedance adjusting member 15 is provided with an adjusting portion 17 arranged between the outer peripheral surface of the insulator 5 and the inner peripheral surface of the shield shell 13, so that the adjusting portion 17 is designed. Impedance can be adjusted by changing.

Further, since the impedance adjusting member 15 is provided with a crimping portion 19 that is crimped to the shielded electric wire 11, the impedance adjusting member 15 can be stably fixed to the shielded electric wire 11, and the shielded electric wire 11 is insulated. It is possible to prevent the adjusting portion 17 of the impedance adjusting member 15 from being dislocated and arranged with respect to the body 5.

Therefore, in such a shield connector 1, the impedance adjusting member 15 can be stably arranged with respect to the shielded electric wire 11 by crimping the crimping portion 19 of the impedance adjusting member 15 to the shielded electric wire 11.

Further, since the crimping portion 19 has a shield crimping piece 21 that is crimped to the shield member 9 and a sheath crimping piece 25 that crimps the sheath 23 that covers the outer periphery of the shield member 9, the crimping portion 19 and the shield crimping piece 21 By crimping the sheath crimping piece 25 to the shielded electric wire 11, the impedance adjusting member 15 can be stably fixed to the shielded electric wire 11.

Further, by crimping the shield crimping piece 21 to the shield member 9, the shield member 9 and the impedance adjusting member 15 are electrically connected, and the reliability of the electrical connection can be improved.

In the shield connector according to the embodiment of the present invention, the shield member is braided, but the present invention is not limited to this, and a metal foil or the like may be used.

1 ... Shield connector 3 ... Core wire 5 ... Insulator 9 ... Shield member 11 ... Shielded wire 13 ... Shield shell 15 ... Impedance adjusting member 17 ... Adjusting part 19 ... Clamping part 21 ... Shield crimping piece 23 ... Sheath 25 ... Sheath Shards

Claims (2)

A shielded electric wire having a shield member whose outer circumference of the core wire is covered with an insulator and which covers the outer circumference of the insulator,
A shield shell in which the terminal portion of the shielded electric wire is housed and electrically connected to the shield member,
An impedance adjusting member electrically connected to the shield shell and arranged at the end of the shielded electric wire,
An adjusting portion provided on the impedance adjusting member and arranged between the outer peripheral surface of the insulator and the inner peripheral surface of the shield shell, and
A crimping portion provided on the impedance adjusting member and crimped on the shielded electric wire,
A shielded connector characterized by having. The shield connector according to claim 1.
The crimping portion is a shield connector having a shield crimping piece that is crimped to the shield member and a sheath crimping piece that crimps a sheath that covers the outer periphery of the shield member.

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