JPH0329895Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field Electrical connectors for multicore cables that are widely used for internal wiring of electronic equipment such as various office automation equipment, FA equipment, and measuring equipment, and for connections between equipment, such as The present invention relates to an attachment structure for a shield cover of a rectangular connector such as a D-sub connector, and particularly to an electrical connection structure between a shield member in the cable and a shield cover.

Purpose of the Invention With the miniaturization of electronic devices, the above-mentioned electrical connectors for multicore cables are required to be smaller and lighter, and electromagnetic shielding measures have become an important issue.

The present invention was developed with the aim of solving these technical issues, and provides a mounting structure for the shield cover of an electrical connector that is smaller and lighter, and also provides a highly reliable shielding effect. It's about doing.

Structure of the invention The structure of the invention to achieve the above object is an electrical connector connected to a multi-core cable,
The shield cover that accommodates the connector main body is made up of a pair of combinable half-shells formed by pressing thin metal plates, and the half-shells gradually become narrower toward the rear, and the cable is attached at the rear end. A semi-cylindrical cap is formed that engages with the shield layer, and the outer periphery of the cap is provided with a threaded portion that forms a helical thread when assembled, and a presser foot that engages with the insulating sheath of the cable is provided at the rear end. the shield layer is formed by folding back a shield braided wire extending from the end of the cable on the side of the connector main body along the insulating outer skin and wrapping a copper foil around the outside thereof; The pair of half-shells are combined and housed in the connector body, and the caps are tightened with cover nuts screwed onto threaded portions of the opposing caps, thereby bringing the caps of the shield layer into close contact and electrically connecting. It is characterized by the fact that it has come to be

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in FIG. 1, the multicore cable 1 is made up of a plurality of covered wires 2, a shield braided wire 3 surrounding these wires 2, and an insulating outer sheath 4 surrounding the shield braided wire 3. , and cable 1
The shield layer 6 of the cable 1 is formed by folding back the extended shield braided wire 3 along the insulating outer skin 4 at the end thereof and wrapping a copper foil tape 5 around the outside thereof.

The connector body 7 connects each coated wire 2 of the cable 1.
It has an insulating housing 9 in which contacts 8 for connecting are housed individually and spaced apart (see FIG. 3). In the illustrated embodiment, each covered wire 2 is connected to the contact 8 by soldering 10, but it may also be connected by crimp.

The shield cover 11 consists of a pair of half-shells 12 and 13 that can be assembled by pressing a conductive metal plate, for example, a thin sheet of mild steel, and the half-shells 12 and 13 are made of nickel metal after being formed. Tsuki is applied.

The half-shell bodies 12 and 13 each have bottom walls 14 and 15 and side walls 16 and 17 rising from both side edges thereof, and a lance (locking protrusion) 19 provided in the side wall 17 is inserted into an opening 18 provided in the side wall 16. Both half shells 12, 13 are combined by engaging snap fitting,
In addition, the bent edges 20 and 21 formed on the front end edges of the half shells 12 and 13 are connected to the flange portion 7 of the connector body 7.
By engaging with a, the connector main body 7 is enclosed and accommodated in the front side portions of the half shells 12 and 13 (see FIG. 2). In addition, the half-shell body 12,1
3 gradually becomes narrower toward the rear, and semi-cylindrical bases 22 and 23 that engage with the shield layer 6 of the cable 1 are formed at the rear end.

The outer peripheries of the caps 22 and 23 are provided with half threaded parts 24 and 25 that form a continuous spiral thread when combined, and the holding pieces 26 and 27 that engage with the insulating outer skin 4 of the cable 1 at the rear ends. are installed in succession.

A cover nut 28 is made of an insulating plastic material and has a female thread 29 that engages with the threaded portions 24 and 25 of the opposing bases 22 and 23, and a taper that engages with the presser pieces 26 and 27 at the rear end opening. It has a wall surface 30 (see FIG. 3). The cover nut 28 is fitted over the cable 1, and when tightened, the presser pieces 26, 27 are pressed against the insulating outer cover 4 of the cable 1 by the tapered wall surface 30,
It is designed to hold the cable 1.

A wire holding arm 31 is provided protruding from the side wall 17 of one half-shell 13. The presser arm 31 is
When forming the shield cover 11 by combining the half shells 12 and 13, the cable 1 is bent inward, the insulating outer cover 4 at the tip of the cable 1 is removed, and the cable 1 is extended in a loose state and connected to the connector body 7. The shield cover 11 is temporarily held so that the large number of covered electric wires 2 do not protrude from the half-shell body 17, and by providing such a holding arm 31, assembly of the shield cover 11 is facilitated.

By configuring the shield cover 11 by combining both half-shells 12 and 13 as described above, the connector body 7 connected to the covered wire 2 of the cable 1 can be covered with the shield cover, as shown in FIGS. 2 and 3. 11 and facing each other.
A cover nut 28 screwed onto the screw portions 24 and 25 of 2 and 23 is tightened, and both caps 22 and 23 are pressed into close contact with the shield layer 6 consisting of the shield braided wire 3 and the copper foil tape 5 to electrically connect them. At the same time, the holding pieces 26 and 27 of the caps 22 and 23 hold the insulating outer sheath 4 of the cable 1 to prevent the contact portion between the caps 22 and 23 and the shielding layer 6 from separating unexpectedly and causing an electrical connection failure. is prevented.

In the figure, 32 is a mounting screw, 33 is a mounting screw 3
This is an E-ring to prevent 2 from falling off.

Effects of the Invention As described above, according to the present invention, since the pair of half-shells that can be combined and form the shield cover are formed by pressing conductive metal plates, they can be manufactured at low cost, and It can be made lighter and smaller.

Further, a threaded portion is provided on the outer periphery of the semi-cylindrical cap formed at the rear end portion of the half shell, and the cap is pressed into close contact with the shield layer formed at the end of the cable with a cover nut screwed into the threaded portion. Because the connection is electrical, the connection work is easier and faster than conventional soldering or crimp connections, and the pair of half-shells, cover nut, and connector body can be assembled without using special tools. Easy to assemble and disassemble. Furthermore, since the shield layer has a structure in which a copper foil tape is wrapped around a shield braided wire that is folded back along the insulating outer skin of the cable, it can accommodate variations in the outer diameter of the cable, and it can adhere tightly to the cap. A reliable and good electrical connection is achieved. Furthermore, when the cover nut is tightened, the holding piece connected to the rear end of the cap bites into the insulating outer sheath of the cable and grips the cable firmly and reliably, so that the contact portion between the cap and the shield layer is separated. There is no risk of contact failure. Therefore, the electrical connection between the shield cover and the shield layer of the cable is reliable, and a high shielding effect can be obtained.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an exploded perspective view of the shield cover mounting structure according to the present invention.
FIG. 2 is a perspective view of the attached state, and FIG. 3 is a sectional view taken along line 3--3 in FIG. 2. 1...Multi-core cable, 2...Sheathed electric wire, 3...
Shield braided wire, 4... Insulating outer cover, 5... Copper foil tape, 6... Shield layer, 7... Connector body,
8...Contact, 11...Shield cover, 1
2, 13... Half shell body, 14, 15... Bottom wall, 1
6, 17... Side wall, 18... Opening, 19... Lance, 22, 23... Base, 24, 25... Threaded portion, 26, 27... Holding piece, 28... Cover nut, 29... Female thread, 30...Tapered wall surface, 31
...presser piece.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An electrical connector connected to a multi-core cable, which includes a pair of half-shells that can be assembled together and whose shield cover that houses the connector body is formed by pressing thin metal plates. The half-shell gradually becomes narrower toward the rear,
A semi-cylindrical cap that engages with the shield layer of the cable is formed at the rear end, and a threaded portion that forms a helical thread in the assembled state is provided on the outer periphery of the cap, and the rear end is provided with a threaded portion that forms a helical thread when assembled. A presser piece that engages with the insulating outer sheath is provided in series, and the shield layer folds back the shield braided wire extending from the end of the cable on the connector main body side along the insulating outer sheath, and has copper on the outside thereof. The shield layer is formed by wrapping foil, and the pair of half-shells are combined to accommodate the connector body, and the caps are tightened with cover nuts screwed onto the threaded portions of the opposing caps, so that the caps are attached to the shield layer. A shield cover mounting structure for electrical connectors that allows for close contact and electrical connection. (2) The shield cover mounting structure for an electrical connector according to claim 1, wherein a presser arm for temporarily holding a group of covered wires of the cable is connected to the half shell. (3) The rear end opening of the cover nut is provided with a tapered wall surface that presses the presser piece connected to the cap of the half shell against the insulating outer sheath of the cable. or second
Shield cover mounting structure for electrical connectors as described in section.