JP7364374B2 - shield connector - Google Patents

Description

The present invention relates to a shielded connector. In particular, the present invention relates to a shield connector having a shielded wire having a shield member and a shield shell electrically connected to the shield member.

Conventionally, shielded connectors include a shielded wire having a core wire whose outer periphery is covered with an insulating inner sheath as an insulator and a braided wire as a shield member that covers the outer periphery of the insulated inner sheath, and a shielded wire in which the terminal portion of the shielded wire is accommodated and the braided wire is electrically connected to the braided wire. A device is known that is equipped with a shield terminal as a shield shell that is connected to the shield terminal (for example, see Patent Document 1).

In this shield connector, an air layer is interposed between the outer circumferential surface of the insulating inner sheath and the inner circumferential surface of the shield terminal. It is preferable to improve the transmission performance by adjusting the dielectric constant between the two and adjusting 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 disposed at the end of a shielded wire (see, for example, Patent Document 2).

The sleeve is disposed so as to be wrapped around the outer periphery of the end portion of the shielded wire, and is electrically connected to the shield member by fitting with the shield member.

Such a sleeve is provided with a small cylindrical part as an adjustment part disposed between the outer circumferential surface of the insulating inner sheath as an insulator of the shield wire and the inner circumferential surface of the shield member, and this small cylindrical part The impedance can be adjusted by changing the design such as the size of the impedance.

Japanese Patent Application Publication No. 2000-228252 JP2015-79651A

By the way, in the shielded connector as disclosed in Patent Document 2, the impedance adjusting member is only disposed by sheathing the end portion of the shielded wire, so that the impedance adjusting member is placed against the insulator of the shielded wire. There was a risk that the adjustment section would be placed out of position.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a shield connector in which an impedance adjusting member can be stably arranged with respect to a shielded wire.

The invention according to claim 1 provides a shielded wire having an outer periphery of a core wire covered with an insulator and a shield member covering the outer periphery of the insulator, and a terminal portion of the shielded wire is accommodated and electrically connected to the shield member. an impedance adjustment member that is electrically connected to the shield shell and arranged at the end of the shield wire; and an impedance adjustment member that is provided on the impedance adjustment member and includes an outer peripheral surface of the insulator and an inner peripheral surface of the shield shell. and a crimping part provided on the impedance adjustment member and crimped to the shielded wire.

In this shielded connector, the impedance adjustment member is provided with an adjustment section that is placed between the outer peripheral surface of the insulator and the inner peripheral surface of the shield shell, so by changing the design of the adjustment section, the impedance can be adjusted. Adjustments can be made.

In addition, since the impedance adjustment member is provided with a crimping part that is crimped to the shield wire, the impedance adjustment member can be stably fixed to the shield wire, and the impedance It is possible to prevent the adjustment portion of the adjustment member from being disposed out of position.

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

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

In this shield connector, the crimping portion includes a shield crimping piece that is crimped to the shield member, and a sheath crimping piece that crimps the sheath covering the outer periphery of the shield member. By crimping the impedance adjusting member 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 adjustment member are electrically connected, and the reliability of the electrical connection can be improved.

Advantageous Effects of Invention According to the present invention, it is possible to provide a shield connector in which an impedance adjusting member can be stably arranged with respect to a shielded wire.

FIG. 1 is a perspective view of a shield connector according to an embodiment of the present invention. 1 is a sectional view of a shield connector according to an embodiment of the present invention. 3 is an enlarged view of the main part of FIG. 2. FIG. 4 is a sectional view taken along line XX in FIG. 3. FIG. FIG. 1 is an exploded perspective view of a shield connector according to an embodiment of the present invention. It is a perspective view when the impedance adjustment member of the shield connector based on embodiment of this invention is arrange|positioned to a shield electric wire. It is a perspective view when the impedance adjustment member of the shield connector based on embodiment of this invention is arrange|positioned to a shield electric wire. It is a perspective view when the impedance adjustment member of the shield connector based on embodiment of this invention is assembled to a shield electric wire. It is a side view of the terminal part of the shielded electric wire of the shielded connector based on embodiment of this invention. 10 is a side view when the sheath is peeled off from the state shown in FIG. 9. FIG. FIG. 11 is a side view when the metal sleeve is placed from the state shown in FIG. 10; FIG. 12 is a side view of the shield member folded back from the state shown in FIG. 11; 13 is a side view when the insulator is peeled off from the state shown in FIG. 12. FIG. 14 is a side view when terminals are connected from the state shown in FIG. 13. FIG.

A shielded connector according to an embodiment of the present invention will be described using FIGS. 1 to 14.

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

The impedance adjustment member 15 is provided with an adjustment portion 17 disposed between the outer peripheral surface of the insulator 5 and the inner peripheral surface of the shield shell 13, and a crimping portion 19 that is crimped onto the shield wire 11. ing.

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

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

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

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

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

The outer periphery of this shield member 9 is covered with a sheath 23.

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

As shown in FIG. 10, the sheath 23 of the thus configured shielded wire 11 is first peeled off by a predetermined length at the terminal portion.

Next, as shown in FIG. 11, an annular metal sleeve 33 is placed around the exposed outer periphery of the 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 so as to cover the metal sleeve 33.

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

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

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

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

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

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

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

This inner housing 29 is accommodated in the shield shell 13 and maintains insulation between the terminals 27 and the shield shell 13.

The shield shell 13 is made of a conductive material and has a cylindrical shape so that the inner housing 29 can be accommodated therein.

Inside the shield shell 13, the adjustment portion 17 of the impedance adjustment member 15 disposed at the end portion of the shielded wire 11 is housed together with the inner housing 29.

In such a shield shell 13, the adjustment part 17 of the impedance adjustment member 15 is inserted into the inside, and the impedance adjustment member 15 is electrically connected and fixed by the engagement means 18 provided between the adjustment part 17 and the adjustment part 17. be done.

The shield shell 13 electrically connected to the impedance adjustment member 15 in this manner is electrically connected to the shield member 9 of the shield wire 11 via the impedance adjustment member 15.

The impedance adjustment member 15 is made of a conductive material, is disposed at the end of the shielded wire 11, and includes an adjustment section 17 and a caulking section 19.

The adjustment portion 17 is formed in a cylindrical shape so that the insulator 5 exposed from the end portion of the shielded wire 11 can be inserted thereinto.

When the impedance adjustment member 15 is placed at the terminal end of the shielded wire 11 that has been subjected to terminal treatment, the insulator 5 of the shielded wire 11 is inserted through the adjustment section 17 so that it is connected to the outer periphery of the insulator 5. They are arranged with a gap 35 between them (see FIG. 4).

Such an adjustment part 17 is housed inside the shield shell 13 with the impedance adjustment member 15 disposed at the end of the shield wire 11, so that the outer circumferential surface of the insulator 5 and the inside of the shield shell 13 are adjusted. It is placed between the surrounding surface.

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

The shield crimping pieces 21 are formed of a single member whose bottom wall side is continuous with the adjustment portion 17, and a pair of shield crimping pieces 21 extend upward from both sides of the bottom wall.

This shield crimping piece 21 is arranged on the outer periphery of the shield member 9 which is folded back on the shielded wire 11 with the adjustment part 17 arranged on the outer periphery of the insulator 5 of the shielded wire 11 (see FIG. 7). ).

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

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

The sheath crimping piece 25 is formed of a single member whose bottom wall side is continuous with the bottom wall of the shield crimping piece 21, and a pair of sheath crimping pieces 25 extend upward from both sides of the bottom wall.

This sheath crimping piece 25 is arranged on the outer periphery of the sheath 23 of the shielded electric wire 11 with the adjustment part 17 arranged on the outer periphery of the insulator 5 of the shielded electric wire 11 (see FIG. 7).

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

By providing the caulking portion 19 on the impedance adjustment member 15 in this way, the impedance adjustment member 15 is firmly fixed to the shielded wire 11, and the adjustment portion 17 of the impedance adjustment member 15 is firmly fixed to the shielded wire 11. will not be misaligned.

The terminal 27 electrically connected to the core wire 3 of the shielded wire 11 having the impedance adjusting member 15 fixed to the end portion of the shielded wire 11 via the caulking portion 19 in this manner is accommodated in the inner housing 29 .

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

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

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

The outer housing 31 is made of an insulating material such as synthetic resin, and is formed into a housing shape so as to be able to accommodate the shield shell 13 and the impedance adjustment member 15. A locking lance 39 to be locked is provided.

The shield connector 1 having the outer housing 31 is fitted with a mating connector 41, the terminals 27 are electrically connected to the mating terminals 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, is mounted on a board 47, and has a mating terminal 43 made of a male terminal having a tab-shaped connection part electrically connected to the board 47 by soldering. It is accommodated.

When the mating connector 41 is fitted to the shield connector 1, the terminals 27 and the mating terminals 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.

Since the shield shell 13 forms a shield circuit in this way, it is possible to prevent noise from leaking from the core wire 3 or from entering the core wire 3.

The outer housing 31 is provided with a deflectable lock arm 49 that maintains or releases the fitted 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 mated, the locking part 51 engages with the locked part 53 provided on the mating connector 41, and the shield connector 1 and the mating connector 41 are mated together. maintains the mated state.

On the other hand, when the shield connector 1 and the mating connector 41 are in the fitted state, the lock arm 49 is bent by pressing the operating part 55, and releases the engagement between the lock part 51 and the locked part 53. The fitted state between the shield connector 1 and the mating connector 41 can be released.

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

Accordingly, as shown in FIG. The adjusting portion 17 is arranged closer to the outer circumferential surface of the core wire 3 than the inner circumferential 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 adjustment part 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 adjustment section 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 by lowering the impedance, the transmission performance can be improved. can.

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

In such a shielded connector 1, since the impedance adjustment member 15 is provided with the adjustment part 17 disposed between the outer peripheral surface of the insulator 5 and the inner peripheral surface of the shield shell 13, the design of the adjustment part 17 is Impedance can be adjusted by changing .

Furthermore, since the impedance adjustment member 15 is provided with a crimping portion 19 that is crimped onto the shielded wire 11, the impedance adjustment member 15 can be stably fixed to the shielded wire 11, and the insulation of the shielded wire 11 can be stabilized. It is possible to prevent the adjustment portion 17 of the impedance adjustment member 15 from being disposed out of position with respect to the body 5.

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

Further, since the caulking portion 19 includes a shield caulking piece 21 that is caulked to the shield member 9 and a sheath caulking piece 25 that caulks the sheath 23 that covers the outer periphery of the shield member 9, the shield caulking piece 21 and By crimping the sheath crimping piece 25 to the shielded wire 11, the impedance adjustment member 15 can be stably fixed to the shielded wire 11.

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

Note that in the shield connector according to the embodiment of the present invention, the shield member is a braid, but the shield member is not limited to this, and may be a metal foil or the like.

1... Shield connector 3... Core wire 5... Insulator 9... Shield member 11... Shield electric wire 13... Shield shell 15... Impedance adjustment member 17... Adjustment part 19... Clinching part 21... Shield crimping piece 23... Sheath 25... Sheath processing fastener

Claims (2)

A shielded electric wire having a core wire whose outer periphery is covered with an insulator and a shield member that covers the outer periphery of the insulator;
a shield shell that accommodates an end portion of the shielded wire and is electrically connected to the shield member;
an impedance adjustment member electrically connected to the shield shell and disposed at a terminal portion of the shield wire;
a cylindrical adjustment part provided in the impedance adjustment member and disposed between the outer peripheral surface of the insulator and the inner peripheral surface of the shield shell;
a crimping part provided on the impedance adjustment member and crimped to the shielded wire;
has
The shield connector is characterized in that the adjustment section is arranged with a gap between it and the outer peripheral surface of the insulator . The shielded connector according to claim 1,
The shield connector is characterized in that the caulking portion includes a shield caulking piece that is caulked to the shield member, and a sheath caulking piece that caulks a sheath covering an outer periphery of the shield member.

Images