JPH0574523A - Connector with shield case - Google Patents

Abstract

(57) [Abstract] [Purpose] In a connector with a shield case that is used in audio equipment for automobiles, etc. to prevent the intrusion of interference radio waves from the outside, the lower surface wall of the shield case is eliminated and the material is effectively used. The purpose is to improve the shield effect. [Structure] A hook-shaped bent portion 34 is provided on an upper surface wall 29 of a metal plate shield case 28 having neither an opening side nor a lower surface side, and is hooked on a part of an upper surface wall 25 of the housing 21 to shield the housing 21. While mounting on the case 28,
The terminal portion 36 of the contactor is arranged in the gap between the housing 21 and the shield case 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector with a shield case for preventing intrusion of disturbing radio waves from the outside, among connectors used in audio equipment for automobiles.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to a connector with a shield case shown in FIGS. FIG. 6 is an external perspective view seen from the rear, FIG. 7A is a front view in a state of being attached to a printed wiring board of a device to be used, FIG. 7B is a side sectional view of the same, and FIG.
(A) -8 (e) is explanatory drawing of an assembling method.

In the figure, reference numeral 1 is a box-shaped housing made of insulating resin, and a bottom wall 2 thereof has plug portions 3 at both ends.
And a plurality of contacts 5 that are terminal portions 4 are press-fitted and installed at a predetermined pitch, and the terminal portions 4 protruding rearward from the bottom wall 2 are
In order to attach it to the printed wiring board 6 of the device used, it is bent downward at a right angle.

Reference numeral 7 denotes a box-shaped metal shield case having upper and lower walls 8A and 8B and a bottom wall 10 like the box-shaped housing 1, and covers the entire housing 1 and the bottom wall 10 has A hole 11 is provided for allowing the terminal portion 6 of the contactor 5 to pass through without contacting. Furthermore, 12
Is a fixing portion for attaching the connector to the printed wiring board 6 of the device used, and has a role of connecting the shield case 7 to an earth circuit while fixing the mounting screw 13 by screwing it into the aperture hole 14.

The assembly of this connector is shown in FIG.
As shown in (b), first, linear contacts 5 are planted in the plurality of bottom holes 2'of the bottom wall 2 of the housing 1. The contact 5 has a plug portion 3 on the inner side of the housing.
The external side is a terminal portion 4, and an intermediate portion thereof is fixed to the housing bottom wall 2.

Next, as shown in FIG. 8C, a box-shaped shield case 7 is covered from the bottom surface 2 side of the insulating housing 1 in which the linear contacts 5 are planted. At this time, the linear contactor 5
The terminal portion 4 of is projected outward from the bottom hole 11 of the shield case 7. Then, after the outer side of the bottom wall 2 of the insulating housing 1 is pushed into the inner side of the bottom wall 10 of the shield case 7, the left and right walls 9A and 9B of the shield case 7 are provided as shown in FIG. 8D. The claw portion 15 is tilted inward, and its tip end is brought into contact with the step portion 18 of the recessed portion 17 on the outer side of the left and right walls 16 of the housing 1.
And the insulating housing 1 are fixed so as not to come off, and then, as shown in FIG. 8 (e), the terminal portion 4 of the contact 5 protruding to the rear of the bottom wall 10 of the shield case 7 is moved downward at a predetermined position. It was bent at a right angle and completed as a connector with a shield case.

[0007]

However, in the above-described conventional connector with a shield case, the shield case 7 has wall portions 8A, 8B, 9A, 9B on the five sides of the upper, lower, left, right, and bottom surfaces excluding the opening side. 7 has the insulating housing 11 held and fixed by these surfaces, and this connector is attached to the printed circuit board 6 of the device.
In the states of (a) and (b), the lower surface wall 8B is arranged over the printed wiring board 6 and is unnecessary in the configuration, and the lower surface wall 8B attaches the connector to the printed wiring board 6. Until then, the insulating housing 1 is merely fixed so as not to come off to below the shield case 7.

Further, from the viewpoint of the shielding effect, since the lower surface of the printed wiring board 6 generally has the copper foil portion 19, the lower surface wall 8B is not necessary and is a wasteful portion in terms of material cost.

Further, the bottom wall 10 of the shield case 7 is provided with a hole 11 for allowing the terminal portion 6 of the linear contactor 5 to pass through without coming into contact therewith. 11 is an incomplete shield.

Further, after the insulating case 1 in which the linear contactor 5 is planted is combined with the shield case 7, the terminal portion 4 of the contactor which is exposed to the rear of the bottom wall 10 of the shield case is lowered at a predetermined position. Although it can be bent almost at a right angle, the bending accuracy in this state is inferior to that in the case of bending with a mold when manufacturing the contact, and the bending position is incorrect and the bending angle is uneven. Is likely to occur.

The present invention is intended to solve such a conventional problem and to provide a connector with a shield case in which the material surface of the shield case is not wasted and the shield case is completely shielded.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a locking piece consisting of a hook-shaped bent portion on the upper wall of a shield case made of a metal plate without an opening and a lower surface. And an engaging portion to be engaged with the engaging piece is provided on the upper wall of the insulating housing.

[0013]

With the above construction, even if the shield case made of a metal plate does not have a lower surface wall, it is possible to prevent the insulating housing from coming off downward by the locking piece provided below the upper surface wall. The bending accuracy can be improved and the material used for the shield case can be reduced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the connector with a shield case of the present invention will be described with reference to FIGS. 1 (a) to 2 (b).

FIG. 1 (a) is an external perspective view seen from the rear, FIG. 1 (b) is an exploded perspective view for explaining the assembly of an insulating housing and a shield case which are main parts, and FIG. 2 is a front view showing a state where the printed circuit board is attached to the printed circuit board.
(B) is a same side sectional view.

In the figure, reference numeral 21 is a box-shaped housing made of insulating resin, and a bottom wall 22 thereof has a linear contact hole 22 '(not shown) for implanting a contact, and left and right walls 23.
Recesses 24A and 24B are provided outside A and 23B from the end of the opening to a predetermined position, and a through hole 26 is provided substantially at the center of the top wall 25 from the bottom surface toward the opening. About half of the opening side is covered with a thin wall 27.

Reference numeral 28 denotes a shield case made of a metal plate, which includes a top wall 29, a bottom wall 30, and left and right walls 31A,
It is composed of 31B. The left and right walls 31A, 31
B includes recesses 24 in the left and right walls 23A and 23B of the housing.
Along with the claw portions 32A and 32B that engage with the A and 24B, the fixing portions 33A and 33B are integrally provided, and further, in the substantially center of the upper surface wall 29, a hook-shaped hooking piece is formed toward the lower front. The bent portion 34 is provided so as to project.

The method of assembling this connector is shown in FIG.
This will be described with reference to FIG. First, FIGS. 3 (a) and 3 (b)
As shown in FIG. 3, a contactor 35 having one end as a plug part and the other end as a terminal 36 is press-fitted into a plurality of holes 22 'of the bottom wall 22 of the insulating housing 21, and as shown in FIG. 3 (c). , The terminal portion 3 of the contactor 35 protruding rearward of the bottom wall 22
Bend 6 downwards at a right angle in place. After this
As shown in (d), the shield case 28 is covered from the bottom surface side of the housing 21. At this time, the hook-shaped bent portion 34, which is a locking piece that protrudes downward and forward from the top wall 29 of the shield case 28, fits into the through hole 26 provided in the top wall 25 of the insulating housing 21, and the tip hook-shaped fold thereof is formed. The curved portion 34 enters under the thin wall 27 and is pushed in until it contacts the end surface 27 'of the wall. Then, as shown in FIG. 3E, the claw portions 32A, 3 of the left and right walls 31A, 31B of the shield case 28 are formed.
2B to the inside, and left and right walls 23 of the housing 21
A, 23B concave portions 24A, 24B step portions 24A ', 24
By engaging with B ', the shield case 28 and the insulating housing 21 are fixed so as not to come off.

At this time, the terminal portion 36 of the contact 35 is connected to the printed circuit board 6A on the lower surface along the gap 28a between the shield case 28 and the insulating housing 21, as shown in FIG. 2 (b). Contact 35 to shield case 28
Since there is no hole for inserting the terminal portion 36, the shielding effect of the shield case 28 is extremely high.

4 and 5 show another embodiment of the connector with a shield case according to the present invention, and FIG. 4 shows a case in which the contact 37, which is formed by bending the insulating housing 21 in advance with a die, is press-fit into the insulating housing 21. Since it is a planted one and is otherwise the same as the embodiment shown in FIGS. 1 (a) and 1 (b), its explanation is omitted.

FIG. 5 shows the insulating housings 39 and 40 in FIG.
Through holes 3 similar to the through holes 26 of the embodiments of (a) and (b)
9a and 40a are provided, and the two insulating housings 39 and 40 are locked to one shield case 38 by hook-shaped bent portions 38a and 38b which are locking pieces of the shield case 38.

Since the other points are the same as those of the embodiment shown in FIGS. 1A and 1B, description thereof will be omitted.

[0023]

As described above, according to the present invention, the hook-shaped bent portion provided on the upper surface wall of the shield case is used as the locking piece, and the through hole 26 into which the locking piece is inserted is formed on the upper surface wall of the insulating housing. Since the lower surface of the shield case is not required by installing the locking part, and the insulating housing is attached to the shield case, the contactor and the terminal at one end are housed in the shield case. Although the bottom surface and the left and right surfaces have walls, the bottom surface, which is the widest surface in terms of shape, has no walls, so the material cost of the shield case is low. (2) Since the bottom wall of the shield case does not have openings such as holes, the shield on this wall surface is complete. And so on.

[Brief description of drawings]

FIG. 1 (a) is an external perspective view of a connector with a shield case according to an embodiment of the present invention seen from the rear side, and FIG. 1 (b) is an exploded perspective view illustrating the assembly of an insulating housing and a shield case, which are the same main parts.

FIG. 2 (a) is a front view of the same device mounted on a printed wiring board, and (b) is a sectional view of the same side.

FIG. 3A to FIG. 3E are explanatory views for explaining the same assembling method.

FIG. 4 is an exploded perspective view illustrating a relationship between an insulating housing and a contactor, which is a main part of another embodiment.

5 is an exploded perspective view for explaining an assembly of an insulating housing and a shield case, which is a main part of another embodiment different from FIG.

FIG. 6 is an external perspective view of a conventional connector with a shield case.

FIG. 7A is a front view showing a state of being mounted on the same printed circuit board, and FIG.

8 (a) to 8 (e) are explanatory views for explaining the same assembling method.

[Explanation of symbols]

 21 Box-shaped housing 22 Bottom wall 23A Left wall 23B Right wall 25 Top wall 28 Shield case 29 Top wall 30 Bottom wall 31A Left wall 31B Right wall 34 Hook-like bent part 35 Contactor 36 Terminal part

Claims (2)

[Claims] 1. A housing in which at least a contact is planted in a bottom wall and a terminal portion of the contact is projected outward, a locking portion provided on an upper surface of the housing, an upper surface of the housing, A bottom wall and a shield case consisting of a top surface that covers the left and right walls, a bottom surface and the left and right walls, and a gap between the bottom wall of the housing and the bottom wall of the housing,
The housing is mounted on the shield case so that the terminal portion is located in this gap. The housing is configured by a locking piece provided on an upper surface of the shield case, which is engaged with an engaging portion provided on an upper surface of the housing. Connector with shield case. 2. A plurality of housings arranged in parallel, a locking portion provided on an upper surface of each of the housings, and a shield case having locking pieces corresponding to the respective locking portions provided on an upper surface. The connector with a shield case according to claim 1.