JP2549121Y2 - Shielded connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded connector using a metal shield case formed by bending.

[0002]

2. Description of the Related Art Conventionally, a shield type connector protects internal contacts from noise by wrapping a synthetic resin connector housing inside a metal shield case and connecting the case to a ground side. In general, a connector housing made of synthetic resin is press-fitted into a shield case formed into a box shape by drawing a metal plate.

[0003]

However, when the shield case is made by drawing, the shield case must be made through a plurality of pressing steps.
The production cost was high in terms of the number of processing steps.

Accordingly, if a metal plate is bent in place of such a drawn product and a box-shaped shield case in which seams at both ends are joined is employed, the number of steps for processing the shield case can be reduced and the cost can be reduced. Can be provided. However, in the folding type shield case, the following problems in strength have occurred.

That is, in consideration of the problem of appearance and the inconvenience at the time of press-fitting, the surface of the shield case needs to be formed smoothly. Therefore, the seam portion cannot have a strong joint structure such as embossing, for example, by forming a groove-like unevenness in the seam when viewed from a plane, and spot-welding the uneven portion. Need to be joined.

On the other hand, since the connector housing must not fall out of the case, the connector housing is pressed into the shield case, or a locking claw protruding on the housing side is resiliently inserted into a locking hole on the case side. When the housing is pressed into the shield case or fitted with the locking claw, tensile stress concentrates on the seam of the shield case when the structure is adopted. There was a problem that the case itself came off and the case itself was easily broken.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to use a shield case formed by bending a metal plate which can be manufactured at a low cost, and when the connector housing is inserted into the shield case, the seam is formed. An object of the present invention is to provide a shielded connector in which a tensile stress is prevented from being concentrated on a portion.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a feature of the present invention is to provide a shielded connector in which a synthetic resin connector housing is housed in a metal shield case. It is formed by bending a metal plate into a box shape, joining the two end edges together in a groove shape and joining them flatly, and joining them on the upper and lower surfaces of the connector housing, and The shield case has an opening formed with a locking hole for fitting the locking claw, and a pair of cutouts reaching the opening edge of the shield case are formed on both sides of the position where the locking hole is formed. It is in.

[0009]

When the connector housing is inserted into the shield case, the locking claw attempts to push open the opening edge of the shield case, and the pushed-open portion is independent of other portions by notches on both sides thereof. When the locking pawl is pushed open and fitted into the locking hole, it returns to its original position resiliently.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. The shielded connector shown in the figure includes a box-shaped shield case 1 having both ends opened, and a synthetic resin connector housing 2 inserted and fixed in the shield case 1. A large number of pin terminals 3a mounted on a printed circuit board (not shown) are provided at the rear portion of the connector housing 2 in a horizontal line, and a large number of contacts 3 integrated with the respective pin terminals 3a are provided at the front side. They are arranged in a line and look through an insertion opening opened on the front surface of the housing 2. A pair of bosses 4 and 5 are provided on both sides of the upper and lower surfaces of the connector housing 2 for both restricting the insertion position with respect to the shield case 1 and positioning the mounting with respect to the printed circuit board and the like. Is also provided with a pair of bosses 6 for insertion control. Further, one locking claw 7 is provided at the center of the upper surface of the connector housing 2, and a pair of locking claws 8 are provided on both sides of the lower surface so as to rise in a tapered shape in the insertion direction.

The shield case 1 is formed by pressing and punching a metal plate such as a phosphor bronze plate to form groove-shaped irregularities 1a having joints at both ends, and bending the box-like shape in a state in which these are engaged. The irregularities 1a are joined flat by molding, and are formed in a box shape with front and rear openings, and then the joining end corners of the irregularities 1a are spot welded.
The processing is completed by integrally joining with b.

On the upper and lower sides of the rear opening edge of the shield case 1, arc-shaped positioning grooves 9 and 10 which contact the respective bosses 4 and 5 are cut out, and are formed on both sides. Is formed with a positioning notch 11 to be engaged with the boss 6.

Further, a rectangular locking hole 12 for engaging with the locking claw 7 is opened on the upper surface side of the shield case 1, and one end is provided on both sides of a peripheral portion of the locking hole 12. A pair of slit-shaped notches 13 reaching the opening edge are formed, and the peripheral portion is separated from other portions of the shield case 1 as a spring piece 14.

A pair of rectangular locking holes 15 for engaging with the respective locking claws 8 are opened on the lower surface side of the shield case 1, and both sides of the peripheral portion of each locking hole 15. A pair of slit-shaped notches 16 each having one end reaching an opening edge are formed. The notch 16 and the peripheral portion surrounded by the groove 10 are separated from other portions of the shield case 1 as spring pieces 17. I have.

In the above configuration, when the connector housing 2 is inserted into the shield case 1, the locking claws 7 and 8 are inserted into the shield case 1 while pushing only the spring pieces 14 and 17 open. The locking claws 7, 8 have locking holes 12,
When the spring pieces 14 and 16 are fitted into the inside, the spring pieces 14 and 16 resiliently return to their original positions, prevent the locking claws 7 and 8 from being removed, and prevent the connector housing 2 from falling off. Further, when the insertion is completed, the bosses 5, 6, 7 are positioned in the positioning grooves 9, 10, respectively.
And the positioning notch 11.

[0016]

As described above, in the shielded connector according to the present invention, when the connector housing is inserted into the shield case, the locking claws try to push open the opening edge of the shield case, but are pushed open. The part is pushed open independently of the other part by the cutouts on both sides thereof, and the locking claw is resiliently returned to the original position by fitting into the locking hole. Therefore, in the present invention, the manufacture of the shield case is simplified, and the concentration of the tensile stress at the joint portion at the time of press fitting, which has been a problem, can be prevented, thereby preventing the shield case from being damaged.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of a shielded connector according to the present invention.

FIG. 2 is a plan view showing an assembled state of the same.

FIG. 3 is a bottom view in an assembled state of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield case 1a Grooved unevenness 1b Spot welding 2 Connector housing 3 Contact 7,8 Locking claw 12,15 Locking hole 13,16 Slit-shaped notch 14,17 Spring piece (peripheral part)

Claims (1)

(57) [Scope of request for utility model registration] 1. A shielded connector in which a synthetic resin connector housing is accommodated in a metal shield case, wherein the metal shield case is formed by bending a metal plate into a box shape, and has a joint at both end edges and a groove. The connector housing is formed by engaging and engaging flatly, and a locking claw is projected from upper and lower surfaces of the connector housing, and a locking hole for fitting the locking claw is formed in the shield case. A shielded connector characterized in that a pair of notches are formed on both sides of the position where the locking hole is formed and reach the opening edge of the shield case.