JP7128511B2 - shield connector - Google Patents

Description

The present invention relates to shielded connectors. In particular, the present invention relates to a structure of a shielded connector that can be attached to an end of a shielded cable that includes one or more electric wires having core wires covered with insulation, braided wires covering the electric wires, and an insulating sheath covering the braided wires.

A shield wire can shield an electrical signal transmitted through a conducting wire from unwanted electromagnetic waves. A coaxial cable, which is a type of shielded cable, is known as a typical example of such a shielded wire. A coaxial cable is generally composed of a core wire (conductor), a dielectric that is a type of insulator surrounding the core wire, a braided wire that covers the dielectric, and an insulating sheath that covers the braided wire.

In recent years, shielded connectors attached to the end of shielded cables are often used in wire harnesses that transmit electrical signals to electrical equipment mounted in automobiles, as they are less susceptible to noise and can transmit high-frequency signals. ing.

For example, such a shield connector is composed of contacts for connecting core wires, a cylindrical inner housing in which the contacts are mounted, and a cylindrical shell that covers the inner housing (see, for example, Patent Document 1: reference).

JP 2008-27881 A

FIG. 8 is a vertical cross-sectional view showing the configuration of a shell provided in a shield connector according to the prior art, showing a state before the crimping portion of the shell is crimped.

FIG. 9 is a vertical cross-sectional view showing the configuration of a conventional shield connector, showing a state in which the crimping portion of the shell is crimped. 8 and 9 of the present application correspond to FIGS. 1 and 4 of Patent Document 1. FIG.

Referring to FIG. 9, a prior art shielded connector 9 is attached to the end of a shielded cable Cb. The shielded cable Cb includes a circular core wire Wc made of a single wire or a twisted wire, a dielectric Di which is a type of insulator surrounding the core wire Wc, a braided wire Wb surrounding the dielectric Di, and a braided wire Wb covered. It consists of a protective insulating sheath Wi. Referring to FIG. 9, the shielded cable Cb is preliminarily stripped of each constituent member from their ends by a predetermined stripped length. That is, the shielded cable Cb is terminated.

8 or 9, the shield connector 9 includes contacts 91, a cylindrical inner housing 92, and a cylindrical shell 93. As shown in FIG. The contact 91 fixes the core wire Wc. The contact 91 has a crimp portion 91a on the base end side and a connection portion 91b on the tip end side. The crimping portion 91a is composed of a conductor barrel. The conductor barrel can electrically connect the contact 91 and the core wire Wc by crimping the core wire Wc.

Referring to FIG. 9, the connecting portion 91b of the contact 91 is formed in a cylindrical shape. A pin-shaped male contact arranged on a mating connector (not shown) can be relatively introduced into the connecting portion 91b from a front opening of the connecting portion 91b. Then, the male contact of the mating connector (not shown) and the contact 91 can be electrically connected. Although FIG. 9 discloses the contact 91 as a female contact, the contact 91 can also be configured as a pin-shaped male contact.

Referring to FIG. 9, the inner housing 92 is made of insulating synthetic resin, and the cylindrical inner housing 92 can be obtained by molding the insulating synthetic resin.

Referring to FIG. 9, the inner housing 92 has contact receiving holes 92h formed therein. A mating contact (not shown) can be introduced from the front side of the contact receiving hole 92h. The contact 91 can be introduced from the rear side of the contact housing hole 92h with the core wire Wc connected.

Referring to FIG. 9, when the contact 91 is housed in the contact housing hole 92h, the connecting portion 91b is arranged facing the front opening of the contact housing hole 92h. Thereby, a mating contact (not shown) can be introduced into the contact 91 .

Also, referring to FIG. 9, the inner housing 92 is held by a cylindrical portion 93b of a shell 93 which will be described later. The inner housing 92 electrically insulates the contacts 91 and the shell 93 .

Referring to FIG. 8 or 9, the shell 93 is molded from a conductive metal deployment plate. The shell 93 has a crimp portion 93a and a cylindrical portion 93b. The cylindrical portion 93b is formed in a cylindrical shape having a hollow inside. The inner housing 92 can be introduced from the front opening of the cylindrical portion 93b. When the inner housing 92 is introduced into the cylindrical portion 93b, the circumference of the inner housing 92 can be shielded by the cylindrical portion 93b (see FIG. 9).

8 or 9, the crimping portion 93a includes a conductor barrel 931 and an insulation barrel 932. As shown in FIG. The conductor barrel 931 can electrically connect the braided wire Wb and the shell 93 by crimping the braided wire Wb. The insulation barrel 932 can fix the shield connector 9 to the end of the shield cable Cb by crimping the insulating sheath Wi.

Referring to FIG. 8 or 9, the shell 93 has a lance 93r bent toward the inside of the cylindrical portion 93b. When the inner housing 92 is introduced through the front opening of the cylindrical portion 93b, the lance 93r can be elastically deformed by being pushed by the outer circumference of the inner housing 92. As shown in FIG. When the inner housing 92 reaches the deep part of the cylindrical portion 93b, the lance 93r is elastically restored and engaged with the recessed portion 92d of the inner housing 92, so that the inner housing 92 can be held inside the shell 93. Also, the axial positioning of the inner housing 92 with respect to the shell 93 can be defined.

However, when the signal transmitted to the core wire or electric wire arranged inside the shielded cable becomes high frequency, there is concern that the electromagnetic wave may leak through the lance. In addition, there is concern that unnecessary electromagnetic waves may enter the electric wire through the lance. Thus, the shielded connector according to the prior art has an open lance on the outer circumference of the shell, which may affect EMC (electromagnetic field compatibility) performance.

There is a need for a shielded connector that can define the axial positioning of the inner housing with respect to the shell without fear of electromagnetic waves leaking or entering from the outer periphery of the shell. And the above can be said to be the subject of the present invention.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems. The object is to provide a shielded connector.

The present inventors constructed a shield connector with a cylindrical inner housing in which one or more contacts connected to an electric wire with an insulating coating on the core wire are mounted, and a cylindrical shell covering the inner housing. The housing is provided with one or more depressions recessed from its outer periphery, and the shell is provided with one or more protrusions protruding from the outer periphery toward the inner periphery. When the inner housing is inserted into the shell, the protrusions By fitting the part into the recessed part, it is possible to define the axial positioning of the inner housing with respect to the shell, and at the same time, it is thought that there is no concern that electromagnetic waves will leak or enter from the outer periphery of the shell. I came to invent such a new shield connector.

(1) A shield connector according to the present invention is a shield connector that can be attached to the end of a shielded cable comprising one or more electric wires having core wires covered with insulation, a braided wire covering the electric wires, and an insulating sheath covering the braided wires. comprising contacts for connecting the core wires, a cylindrical inner housing for mounting the contacts, and a cylindrical shell covering the inner housing, the inner housing being recessed from the outer periphery thereof. The shell has one or more depressions, and the shell has one or more projections that protrude from the outer circumference toward the inner circumference and can be fitted into the depressions, and the projections are fitted into the depressions. By doing so, the axial positioning of the inner housing with respect to the shell can be defined.

(2) It is preferable that the inner housing has a pair of recessed portions arranged to face each other.

(3) The shielded cable is composed of a plurality of electric wires with insulation coating on the core wires, a braided wire that covers the wires in a bundled state, and an insulating sheath that covers the braided wires, and a plurality of contacts that connect the core wires. may be provided.

(4) The inner housing has a key groove notched from the front surface to the rear surface along the axial direction, and the shell protrudes from the inner periphery toward the center and engages with the key groove. Therefore, it is preferable to have a key for defining the position of the inner housing about the axis with respect to the shell.

(5) The shell has a first crimping portion that crimps the braided wire and a second crimping portion that is continuous with the first crimping portion and crimps the insulating sheath on the base end side. is preferred.

A shield connector according to the present invention comprises a cylindrical inner housing in which one or more contacts to which electric wires are connected is mounted, and a cylindrical shell covering the inner housing. One or more depressions are provided, and the shell is provided with one or more projections projecting from the outer circumference to the inner circumference, and when the inner housing is inserted into the shell, the projections fit into the depressions. As a result, the axial positioning of the inner housing with respect to the shell can be defined, and there is no fear of electromagnetic waves leaking or entering from the outer periphery of the shell.

1 is a perspective view showing the configuration of a shield connector according to one embodiment of the present invention; FIG. FIG. 4 is a perspective exploded view showing the configuration of the shield connector according to the embodiment; FIG. 4 is a perspective view showing the configuration of the shield connector according to the embodiment, and is a state diagram before incorporating a shell provided in the shield connector. 4A is a front view of the shield connector, FIG. 4B is a right side view of the shield connector, and FIG. (A) is a cross section taken along line AA. 5A is a front view of the shell, FIG. 5B is a right side view of the shell, and FIG. and FIG. 5(D) is a bottom view of the shell. 6(A) is a front view of the inner housing, FIG. 6(B) is a right side view of the inner housing, and FIG. 6(C). 6(D) is a plan view of the inner housing, FIG. 6(E) is a bottom view of the inner housing, and FIG. 6(F) is a perspective view of the inner housing. FIG. 7A is a diagram showing the assembly process of the shielded connector according to the embodiment, FIG. 7A is a state diagram before terminal processing of the shielded cable, and FIG. Fig. 7(C) shows a state in which a ferrule is wrapped around the outer circumference of the braided wire after peeling, Fig. 7(C) shows a state in which the ferrule is crimped around the outer circumference of the braided wire, Fig. 7(D) shows the braided wire folded back around the outer circumference of the ferrule. FIG. 7(E) is a state diagram in which the coating of the electric wire is peeled from the end surface of the electric wire by a predetermined length, FIG. 7(F) is a state diagram before the crimping portion of the contact is crimped to the core wire FIG. 7(G) is a diagram showing the state in which the crimped portion of the contact is crimped onto the core wire, FIG. 7(H) is a diagram showing the state in which a plurality of contacts are mounted in the inner housing and the inner housing is inserted from the rear of the shell, FIG. (J) is a state diagram showing the completion of a series of assembly steps. FIG. 4 is a vertical cross-sectional view showing the structure of a shell provided in a conventional shield connector, and is a state diagram before crimping the crimping portion of the shell. FIG. 4 is a vertical cross-sectional view showing the structure of a shield connector according to the prior art, and is a state diagram in which the crimping portion of the shell is crimped.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of shield connector]
First, the configuration of a shielded connector according to one embodiment of the present invention will be described.

(overall structure)
1 to 4, a shielded connector (hereinafter abbreviated as connector) 10 according to one embodiment of the present invention can be attached to the end of a shielded cable 1. As shown in FIG. A shielded cable 1 includes a plurality of electric wires 1w, a braided wire 1b, and an insulating sheath 1c. The electric wire 1w covers the core wire 1a with insulation. The braided wire 1b covers a plurality of electric wires 1w in a bundled state. The insulating sheath 1c covers the braided wire 1b. (See Figures 2-4).

1 to 6, the connector 10 comprises a plurality of contacts 11, a cylindrical inner housing 2 and a cylindrical shell 3. As shown in FIG. The contact 11 connects the core wire 1a (see FIG. 2 or FIG. 7(G)). The inner housing 2 has a plurality of contacts 11 mounted therein (see FIG. 3 or FIG. 7(H)). The shell 3 surrounds the inner housing 2 (see FIG. 1 or FIG. 3(C)).

2 or 3 and 6, the inner housing 2 forms a pair of recessed portions 2d, 2d recessed from the outer periphery thereof. A pair of recessed parts 2d and 2d are arranged to face each other. The shell 3 has a pair of protrusions 3b, 3b that protrude from the outer periphery toward the inner periphery (see FIG. 1 or FIG. 4 and FIG. 5(C)).

When the inner housing 2 is inserted into the shell 3 from the state shown in FIG. (See FIG. 4(C)).

Referring to FIGS. 1 to 6, in the connector 10 according to the embodiment, since the protrusion 3b that defines the axial positioning of the inner housing 2 with respect to the shell 3 seals the outer periphery of the shell 3, the shell 3 There is no concern that electromagnetic waves will leak or enter from the outer periphery of the

(Construction of contacts)
Next, the configuration of the contact 11 according to the embodiment will be described. Referring to FIG. 3, the contact 11 is fixed to the end of the wire 1w. The contact 11 has a crimp portion 11a on the base end side and a connection portion 11b on the tip end side. The crimping portion 11a is composed of a conductor barrel. By crimping the core wire 1a, the conductor barrel can electrically connect the contact 11 and the wire 1w.

Referring to FIG. 3, the connecting portion 11b is formed in a cylindrical shape. A pin-shaped male contact arranged on a mating connector (not shown) can be relatively introduced into the connection portion 11b from a front opening of the connection portion 11b. Then, the male contact of the mating connector (not shown) and the contact 11 can be electrically connected. Although the contact 11 is disclosed as a female contact in FIG. 3, the contact 11 can also be configured as a pin-shaped male contact.

Referring to FIG. 3, the contact 11 is made of a conductive metal plate, and a cylindrical contact can be obtained by molding a conductive metal expansion plate. The contact 11 can also be obtained by processing a conductive metal rod to obtain a cylindrical contact.

(Structure of inner housing)
Next, the configuration of the inner housing 2 according to the embodiment will be described. Referring to FIG. 2 or 3 and FIG. 4C or 6, the inner housing 2 is made of an insulating synthetic resin, and the inner housing 2 is formed into a desired shape by molding the insulating synthetic resin. can be obtained.

2 or 3 and 6, the inner housing 2 has four contact receiving holes 2h. A mating contact (not shown) can be introduced from the front side of the contact receiving hole 2h. The contact 11 can be introduced from the rear side of the contact housing hole 2h with the electric wire 1w connected.

Referring to FIG. 3, when the contact 11 is housed in the contact housing hole 2h, the connecting portion 11b faces the front opening of the contact housing hole 2h. Moreover, the contact housing holes 2h are open on the outer peripheral side of the inner housing 2 except for a part thereof. Thereby, the housing state of the contacts 11 can be confirmed with respect to the inner housing 2 .

2 or 3 and 6, the inner housing 2 has a rectangular keyway 2k formed on its outer periphery. The key groove 2k is notched from the front surface toward the rear surface along the axial direction of the inner housing 2. As shown in FIG.

On the other hand, referring to FIG. 4(A), the shell 3 has a key 3k projecting from its inner circumference toward the center. 2 or 3, when the inner housing 2 is inserted into the shell 3 from the rear portion of the shell 3, the key 3k is engaged with the key groove 2k, so that the inner housing 2 rotates relative to the shell 3 around the axis. position can be specified. As a result, the connector 10 can be properly connected to a mating connector (not shown).

(shell configuration)
Next, the configuration of the shell 3 according to the embodiment will be described. Referring to FIG. 1 or 2 and FIG. 4 or 5, the shell 3 is made of a conductive metal plate and formed into a tubular shape by molding a conductive metal deployment plate.

1 or 2 and 4 or 5, the shell 3 continuously forms a connecting portion 31, a pair of rings 32, 32 and a crimping portion 33. As shown in FIG. The connecting portion 31 is formed on the tip side of the shell 3 . The connecting portion 31 can be connected to a cylindrical shell of a mating connector (not shown). The connection portion 31 is configured with an open entry in which one or more notches are cut out on the outer periphery, but the connection portion 31 may also be configured with a closed entry with a continuous outer periphery.

1 or 2 and 4 or 5, a pair of ring zones 32, 32 are formed in the intermediate portion of the shell 3. As shown in FIG. The ring zone 32 protrudes in the outer peripheral direction of the shell 3 . The shell 3 is inserted into the interior of an external housing (not shown), a flat plate-shaped positioning assurance member (not shown) having a U-shaped slot formed on the tip side is inserted from the external housing (not shown), and the positioning assurance member ( (not shown) is inserted between the pair of ring zones 32, 32 to ensure the axial positioning of the shell 3 with respect to the external housing (not shown).

Referring to FIG. 1 or 2 and FIG. 4 or 5, the crimping portion 33 is formed on the base end side of the shell 3 . The compression part 33 can be divided into a first compression part 331 and a second compression part 332 . The second crimping portion 332 is continuous with the first crimping portion 331 . 2 and 5 show the state before the crimping portion 33 is crimped, and FIGS. 1 and 4 show the state after the crimping portion 33 is crimped.

Referring to FIG. 4C, the first crimping portion 331 crimps the braided wire 1b. Thereby, the shell 3 and the braided wire 1b can be electrically connected. The second crimping portion 332 crimps the insulating sheath 1c. Thereby, the connector 10 can be fixed to the end of the shielded cable 1 .

(Assembly method of shield connector)
Next, a method for assembling the connector 10 according to the embodiment will be described. First, the shielded cable 1 shown in FIG. 7A is terminal-processed. Referring to FIG. 7B, the insulating sheath 1c is peeled off from the end surface of the shielded cable 1 by a predetermined length, and a band-shaped metal sleeve 12 is wound over the braided wire 1b. Next, referring to FIG. 7(C), a metal sleeve 12 is crimped onto the braided wire 1b.

Next, referring to FIG. 7(D), the braided wire 1b is folded back around the outer circumference of the metal sleeve 12. Then, referring to FIG. Next, referring to FIG. 7(E), the coating is peeled off from the end face of the electric wire 1w by a predetermined length to expose the core wire 1a. The terminal processing of the shielded cable 1 is completed as described above. Next, referring to FIG. 7(F), the core wire 1a is inserted through the crimp portion 11a of the contact 11. Then, as shown in FIG. Next, referring to FIG. 7(G), the crimp portion 11a is crimped to the core wire 1a.

Next, referring to FIG. 7(H), the plurality of contacts 11 are mounted on the inner housing 2 . Next, after inserting the inner housing 2 into the shell 3 from the state shown in FIG. 7(H), the crimping portion 33 is crimped to the end of the shielded cable 1 (see FIG. 7(G)). Then, a series of assembling steps is completed.

[Action of shield connector]
Next, the action and effect of the connector 10 according to the embodiment will be described.

4(C), when the inner housing 2 is inserted into the shell 3, the projection 3b fits into the recess 2d, thereby axially positioning the inner housing 2 with respect to the shell 3. can be easily defined.

Referring to FIGS. 1 to 6, the connector 10 according to the embodiment has a recess 2d defining axial positioning of the inner housing 2 with respect to the shell 3, sealing the outer periphery of the shell 3. There is no concern that electromagnetic waves will leak or enter from the outer periphery of the

2 or 3, when the inner housing 2 is inserted into the shell 3 from the rear portion of the shell 3, the key 3k is engaged with the key groove 2k, so that the inner housing 2 rotates relative to the shell 3 around the axis. position can be specified. As a result, the connector 10 can be properly connected to a mating connector (not shown).

1 or 2 and FIG. 4 or 5, the shell 3 has a crimping portion 33 for crimping the end of the shielded cable 1 on the base end side. The device can be fixed securely.

In the shield connector according to the present invention, the inner housing is provided with a recess recessed from the outer periphery, the outer periphery is closed, the shell is provided with a protrusion protruding from the outer periphery toward the inner periphery, and the protrusion is fitted into the recess. , an embodiment has been disclosed in which the axial positioning of the inner housing with respect to the shell can be defined. A portion may be provided in the shell and the protrusion may fit into the recess to define the axial positioning of the inner housing with respect to the shell.

Although the shield connector according to the present invention has been disclosed in an embodiment in which it is attached to the end of a multi-core shield cable in which a plurality of electric wires are bundled, the shield connector according to the present invention can also be applied to a single-wire shield cable such as a coaxial cable.

Reference Signs List 1 shielded cable 1a core wire 1b braided wire 1c insulating sheath 1w electric wire 2 inner housing 2d depression 3 shell 3b protrusion 10 connector (shield connector)
11 contacts

Claims (4)

A shielded connector that can be attached to an end of a shielded cable comprising one or more wires having a core wire covered with insulation, a braided wire covering the wires, and an insulating sheath covering the braided wire,
a contact for connecting the core wire;
a cylindrical inner housing for mounting these contacts;
a cylindrical shell surrounding the inner housing,
The inner housing has one or more recesses recessed from its outer periphery,
the shell has one or more protrusions that protrude from the outer periphery toward the inner periphery and can be fitted into the recesses;
By fitting the protrusion into the recess, the axial positioning of the inner housing with respect to the shell can be defined,
A shield connector , wherein an outer periphery of a shell including the projecting portion is sealed to prevent electromagnetic waves from leaking from the outer periphery of the shell . 2. The shielded connector according to claim 1, wherein said inner housing has a pair of said recesses arranged opposite to each other. The shielded cable is composed of a plurality of electric wires with insulation coating on the core wires, a braided wire that covers the wires in a bundled state, and an insulating sheath that covers the braided wire,
3. The shield connector according to claim 1, comprising a plurality of contacts for connecting said core wires. The shell is
a cylindrical first crimping portion for crimping the braided wire;
4. The second crimping portion, which is continuous with the first crimping portion in the axial direction and whose outer periphery is continuous, and which crimps the insulating sheath, is provided on the base end portion side. shielded connector.

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