JP2547934Y2 - Connector shield case - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield case for a connector for electromagnetic shielding of an electrical connector, and in particular , through an external braid of a cable connected to the shield case.
The present invention relates to a structure of a clamp for fixing a cable to a shield case .

[0002]

2. Description of the Related Art As a means for preventing external noise from affecting a signal transmitted through an electrical connector, a connector is housed and fixed in a metal plate case so as to leave an insertion hole for a mating connector. It has been practiced to shield this case by grounding it via an external braid, for example, by removing and exposing an outer sheath of a cable connected to a connector contact. By the way, in this case, means for preventing the electrical connection between the external braid of the cable and the metal plate case and the electrical connection of the cable to the connector contact due to the tensile force applied to the cable are provided. Need to be done. Therefore, conventionally, as shown in the perspective view of FIG. 5A, the metal plate case (1) protrudes in the direction in which the cable (2) is drawn out, and, for example, two clamp fingers ( A clamp part (3) having 3a) and having one clamp finger (3b) in the right direction is provided integrally with the metal plate case (1) near the cable lead-in part (1b). And for example, this clamp finger (3
a) By winding the cable (2) on the external braid (2a) of the cable (2) as shown in the perspective view of FIG. Clamping has been done.

[0003]

However, in such a clamp structure of the cable (2), the fixing force of the cable is limited by the thickness and material of the clamp fingers (3a) and (3b), that is, by the metal plate case (1). It depends on the thickness and material. Whereas the thickness of the metal plate of the case (1), the material is constrained etc. molding conditions of the case portion. Therefore, clamp fingers (3
a) It is difficult to obtain a sufficient cable holding force according to (3b). To prevent this, for example, it is conceivable to increase the width of the clamp fingers (3a) (3b). However, in this method, the twisting of the cable (2) or the rotation of the cable (2) about the axis causes the clamp finger (3) to be bent.
a) Only the edge of (3b) first deforms, which gradually spreads over the entire clamp finger and eventually the clamp finger (3).
a) The winding of (3b) is loosened and the holding force is reduced. Therefore, it is impossible to withstand the unexpected tensile force applied to the cable (2).

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a clamp structure capable of obtaining a necessary cable holding force for a long period of time.

[0005]

The purpose of the present invention According to the present invention for solving the above object, according to a following unit, that is, [the electrical connector sheet metal case for covering a fixing portion for fixing the electrical connector, prior to SL <br A cable lead-in hole for leading a cable into a case, and the cable lead-in hole near an opening of the cable lead-in hole.
Connect the external braid to the case, and the connector shield case and a cable clamp unit for fixing said cable, said cable clamp part integrally with the case from the edges of the cable entry hole
Formed along the cable in the cable exit direction
It extends like a band, and its band section is curved inward
It is formed in an arc shape and its tip is bent outward
An extension formed as a wrapping member retaining portion, and a metal plate-shaped wrapping member for bundling and wrapping the extension and the outer periphery of the outer braid of the cable.
Connect the case to the external braid of the cable
Cable is fixed to the case ].

[0006]

According to the present invention, if the wrapping member for the cable is separated from the metal plate case as in the present invention, the thickness and material of the wrapping member are restricted by the plate thickness and material of the metal plate case. Instead, it can be selected according to the required holding force, so that a clamp structure with high holding force can be obtained.

[0007]

1 (a) and 1 (b) are an exploded external view showing an embodiment of the present invention and a developed view of a winding member. In the figure, (1) is a case made of a metal plate, (1a) is an insertion / removal opening of a mating connector, (1b) is a cable lead-in hole, (4) is an extending portion having an arc-shaped cross section, and (4a) is an extending portion ( 4) A winding member retaining portion provided by bending the tip downward, and the extending portion (4) is provided in a metal plate case such that the extending direction is the cable extracting direction. A metal plate case is integrally provided near the lower surface of the cable outlet (1b) when the metal plate case is formed. Next, (5) is a winding member made of a metal plate, and as shown in a development view shown in FIG.
a) and the wrapping member retaining portion (4) of the extension portion (4).
a), a notch (5b) for positioning, and a butt projection (5c) and a butt recess (5c) forming males and females.
The punched plate material provided with d) is formed by bending it into an arc shape so that the cable (2) can enter. Next, the procedure of clamping the cable by the above members will be described. FIG.
As shown in (a), for example, a punch is used as a winding jig.
(6) Using (7) , the positioning hole (5a) of the winding member (5) is fitted into the positioning protrusion (6a) provided on the bottom surface of the concave portion of the lower punch (6), and the winding member ( 5) Put. Next, after the extension part (4) is put into the winding member (5) together with the cable (2), the winding member retaining part (4a) of the extension part (4) is connected to the winding member (5). Notch for positioning
Place in the section (5b) for alignment. Finally, the winding member (5) is sandwiched from above and below by a punch upper die (7) and a punch lower die (6) having a concave lower end surface, so that the winding member (5) is shown by a dotted line in FIG. As shown in FIG. 2B, the cable is wound around the outer braid (2a) of the cable (2) to complete the clamping of the cable.

Although the embodiment of the present invention has been described above, the extension (4) may have any shape as long as it can be bundled with the cable (2) by the winding member (5). The shape extending along is often more advantageous for processing. The width of the extension (4) is not necessarily uniform, but when the cross-section of the cable (2) is circular, it is preferable that the cross-section of the cable (2) be an arc having the same radius. Good. By doing so, an unnatural force is not applied to the outer periphery of the cable (2), and the winding member (5) can be well adhered, so that the electrical connection between the two can be made well . May be of the non-shape various described by earlier examples as the shape of or the winding member anchoring portion (4a).
In the example of the perspective view shown in FIG. 3A, the entire edge of the distal end portion of the extension portion (4) is bent downward and the retaining portion (4) of the winding member is bent.
In this example, the bending angle is set to a value close to a right angle.
Even at about 0 °, the retaining effect is exhibited. In the example of FIG. 3B, a slanted projection bent downward is provided at the tip of the extension portion (4) to form a winding member retaining portion (4a). In this example, the winding member is provided. At the end of (5), a notch (5b) for positioning, into which the above-mentioned obliquely projecting winding member retaining portion (4a) is inserted, is provided to facilitate positioning of the winding member (5). In the example of FIG. 3 (c), T-shaped projections are provided on the left and right of the tip of the extension (4), and the wrapping member retaining section (4
a), and by providing the above-described wrapping member retaining portion (4a), it is ensured that the wrapping member (5) comes off or comes off the extension portion (4). This prevents the cable from being clamped to the metal plate case. Further, the winding member (5) may be any as long as the extension portion (4) and the outer periphery of the cable (2) can be bundled and fixed by winding, for example, FIGS. 4 (a), (b) and (c).
As shown in the perspective view of (d), it can take various shapes such as a rectangular shape, a narrower central portion, a rhombic shape and an elliptical shape. The material is not limited to copper, iron, aluminum or an alloy mainly composed of these, as long as the required winding force can be obtained .

[0009]

As is clear from the above description, in the present invention, since the winding member for winding the cable and the extending portion is provided separately from the extending portion, the thickness and the material of the winding member, and furthermore, The size can be freely selected independently of the thickness, material and size of the metal case. Therefore, it is possible to easily increase the winding force of the winding member and securely clamp the cable to the metal plate case, and furthermore, the shielding performance of the metal case and the fixing performance of the cable clamp are individually the best. The effect that can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention.

FIG. 2 is an explanatory view of a clamping procedure according to the present invention.

FIG. 3 is an explanatory view of another example of the extension part in the present invention.

FIG. 4 is an explanatory view of another example of a winding member according to the present invention.

FIG. 5 is an explanatory view of a conventional cable clamp procedure.

[Explanation of symbols]

(1) Metal plate case (1a) Insertion / extraction opening of mating connector (1b) Cable entry hole (2) Cable (2a) External braid (3) Cable clamp (3a) Clamp finger (3b) Clamp finger (4) the extended portion (4a) wound member anchor section (5) winding member (5a) positioning hole (5b) notch for positioning (5c) abutting convex portions (5d) abutting the recess (6) punch lower die (6a ) Positioning protrusion (7) Upper punch

Claims (2)

(57) [Scope of request for utility model registration] 1. A case made of a metal plate for covering an electric connector, a fixing portion for fixing the electric connector, a cable drawing hole for drawing a cable into the case,
Outside the cable near the opening of the cable entry hole
In a connector shield case having a part braid connected to the case and a cable clamp part for fixing the cable, the cable clamp part is formed integrally with the case from an edge of the cable drawing hole. How to pull out the cable
In a band along the cable,
The cross section is formed in the shape of a circular arc curved inward and
The end is an outwardly bent winding member retaining part
The formed extension portion, and a metal plate-shaped winding member for binding and winding the extension portion and the outer periphery of the outer braid of the cable ,
Connect the case to the external braid of the cable and
A shielded case for a connector , wherein the cable is fixed to the case. 2. A tip portion of the extension portion is a T-shaped extension portion.
2. The method according to claim 1, wherein the wrap member retaining portion is formed.
Shield case for connector.