JP2003078273A - Shield box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a high shield effect even when a case is made of a thin plate material. SOLUTION: When a lower case 21 and an upper case 41 are coupled and the fringe part of the upper case 41 enters a groove part 29 provided at the fringe part of opening of the lower case 21, an outer contact body 32 in the groove part 29 is deformed resiliently while being clamped between the outward inner wall face 29a of the groove part 29 and the outward surface 41a at the fringe part of the upper case 41, which are thereby connected electrically by the resilience thereof. Furthermore, an inner contact body 36 in the groove part 29 is deformed resiliently while being clamped between the inward inner wall face 29b of the groove part 29 and the inward surface 41b at the fringe part of the upper case 41, which are thereby connected electrically by the resilience thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for obtaining stable shielding characteristics in an openable / closable shield box having an electromagnetically shielded space formed therein.

[0002]

2. Description of the Related Art When testing a wireless terminal such as a mobile phone by using a pseudo base station device, a coupling is performed so that radio waves are not exchanged between the wireless terminal and an actual base station. Put the wireless terminal in a shield box with a built-in antenna, connect the pseudo base station device and the coupling antenna,
Radio waves are exchanged between the wireless terminal and the coupling antenna in the seal box.

FIG. 24 shows the structure of a conventional shield box 1 used for such a purpose.

The shield box 1 is made of a metal and has a box shape. Cases 2 and 3 each having an opening on one side thereof are coupled so as to close each other's opening, and electromagnetically applied from the outside. A shielded space is formed inside.

In the shield box 1 having such a structure, the shield effect is deteriorated when the contact state of the connecting portions of the cases 2 and 3 is poor. Therefore, as shown in FIG. The case 2 is attached along the inner edge of the opening of the case 3, and the case 2 and the case 3 are attached as shown in FIG.
When they are integrally coupled, the contact body 4 is sandwiched between the outer surface 2a of the edge portion of the opening of the case 2 and the inner surface 3a of the edge portion of the opening of the case 3, The contact body 4 is deformed, and the contact pressure by the restoring force is utilized to make the case 2,
The edges of the openings of No. 3 are brought into electrical contact with each other to obtain a shielding effect.

[0006]

However, in the shield box 1 having the above-described structure, when the cases 2 and 3 are made of thin plate materials, as shown in FIG. However, there is a problem that the contact body 4 is deformed by a restoring force in a place having low rigidity other than the corners, a uniform contact pressure cannot be obtained, and the shield effect is reduced.

An object of the present invention is to solve this problem and to provide a shield box which can obtain a high shielding effect even when the case is made of a thin plate material.

[0008]

In order to achieve the above-mentioned object, a shield box according to claim 1 of the present invention is a pair of cases (21, 41) which are made of a conductive material and whose one surface side is open.
In a seal box that is integrally coupled so as to block the opening surfaces of each other and forms an electromagnetically shielded space inside, it is made of a conductive material having flexibility, and when the pair of cases are coupled, The outer contact body (32) electrically deforms into an outer surface of the edge portion on the opening surface side of the one case and the outer surface of the edge portion on the opening surface side of the other case by the restoring force. ) And a flexible conductive material, which deforms when the pair of cases are coupled to each other, and the restoring force thereof causes an edge portion on the opening surface side of the one case and an opening surface side of the other case. And an inner contact body (36) for electrically connecting the inner side surface of the edge portion.

A shield box according to a second aspect of the present invention is the shield box according to the first aspect, wherein the outer contact body and the inner contact body are in contact with each other when the pair of cases are in an uncoupled state. It is characterized in that it is deformed in the state.

A shield box according to a third aspect of the present invention is the shield box according to the first aspect, wherein the edge portion of one of the pair of cases on the opening surface side is the edge of the opening surface side of the other case. Grooves (2) for receiving edges
9) is continuously formed, and the outer contact body and the outer surface (41a) of the edge portion on the opening surface side of the other case and the outer surface (41a) in the groove portion when the pair of cases are combined. The case is deformed by being sandwiched between the groove wall of the one case and the inner wall surface (29a) of the groove on the outer side, and by the restoring force thereof, the outer surface of the edge portion on the opening side of the other case and the groove portion. It is configured to electrically connect to the inner wall surface on the outside,
The inner contact body has an inner surface (41b) of an edge portion on the opening surface side of the other case and an inner surface of the groove portion of the one case when the pair of cases are combined. It is deformed by being sandwiched between the inner wall surface (29b) of
The restoring force electrically connects between the inner surface of the edge portion on the opening surface side of the other case and the inner wall surface of the groove portion.

Further, a shield box according to a fourth aspect of the present invention is the shield box according to the third aspect, characterized in that the outer contact body and the inner contact body are mounted in the groove portion.

A shield box according to a fifth aspect of the present invention is the shield box according to the third aspect, wherein the outer contact body and the inner contact body have an opening surface side of the case where the groove is not formed. It is characterized by being attached to the edge of.

A shield box according to a sixth aspect of the present invention is the shield box according to the fourth aspect, wherein the outer contact body extends in the depth direction of the groove portion in a state of being substantially in contact with the inner wall surface of the groove portion on the outer side. Contact with the extended fixing piece (33) and the outer surface of the edge of the opening side of the other case that extends from one end of the fixing piece toward the inner wall surface of the inner side of the groove and enters the groove. And a movable piece (34) which is bent toward the inner wall surface of the groove portion, and the inner contact body is in contact with the inner wall surface of the groove portion in the depth direction of the groove portion. A fixing piece (37) extending to the inside of the groove, and extending from one end of the fixing piece to the inner wall surface side of the groove portion on the outer side, and on the inner surface of the edge portion on the opening surface side of the other case entering the groove portion. Movable piece (38) that comes into contact with and bends toward the inner wall surface outside the groove.
And at least the movable pieces of the outer contact body and the inner contact body are formed so as to be arranged at predetermined intervals in the length direction of the groove portion.

A shield box according to a seventh aspect of the present invention is the shield box according to the sixth aspect, wherein the movable piece of the outer contact body and the movable piece of the inner contact body are located at a position of about 1 of the predetermined interval. It is characterized by a deviation of / 2.

The shield box of claim 8 of the present invention is the shield box of claim 7, wherein the movable piece of the outer contact body and the movable piece of the inner contact body intersect each other. There is.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show the appearance and the configuration of the main part of a shield box 20 to which the present invention is applied.

As described above, the shield box 20 accommodates the wireless terminal and the coupling antenna to test the wireless terminal, and as shown in FIGS. 1 to 4, the conductive material is used. It has a lower case 21 and an upper case 41 made of (for example, a metal material such as aluminum or a conductive resin).

The lower case 21 includes a rectangular bottom plate 22, a front plate 23 that rises from the front edge of the bottom plate 22, side plates 24 and 25 that rise from both side edges of the bottom plate 22, and a rear plate 26 that rises from the rear edge of the bottom plate 22. Is formed into a substantially rectangular box shape having an open upper surface.

The front plate 23 and the side plates 24, 25 of the lower case 21
A groove forming plate 28 made of a conductive material similar to that of the lower case 21 is fixed to the upper end of the inner wall of the rear plate 26 so as to be connected in a frame shape.

The groove forming plate 28 receives the edge of the upper case 41, which is paired with the lower case 21, on the opening surface side to a predetermined depth over the entire circumference, and also contacts the contact block 3 described later.
A groove portion 29 for holding 0 is formed along the inner edge of the lower case 21 on the opening surface side.

Here, the groove forming plate 28 includes the four inner wall surfaces 21a of the lower case 21, that is, the front plate 23 and the side plates 24 and 25.
And the base portion 2 fixed to each inner wall surface of the rear plate 26.
8a and an inclined portion 28b extending slightly inward from the upper end of the base portion 28, and a groove portion 29 having a substantially V-shaped cross section is formed between the inclined portion 28b and each inner wall surface 21a of the lower case 21. .

In this case, the inner wall surface 29a of the groove portion 29 on the outer side is the upper part of each inner wall surface 21a of the lower case 21, and the inner wall surface 29b of the groove portion 29 on the inner side is the inclined portion 28b of the groove forming plate 28. Is the surface of.

A contact block 30 is attached to the groove 29. As shown in FIGS. 4 and 5, the contact block 30 is integrally formed of a thin plate of a conductive material (for example, phosphor bronze) such as a metal having flexibility, and is located outside the groove 29. An outer contact member 32 is provided on the upper end side of a strip-shaped base 31 extending in the lengthwise direction of the groove 29 along the inner wall surface 29a.
Are provided at predetermined intervals, and inner contact bodies 36 are provided at predetermined intervals on the lower end side of the base 31. The base 31 is
It is fixed to the inner wall surface 29a on the outer side of the groove 29 by spot welding, screwing or the like.

Each outer contact body 32 has a fixing piece 33 extending upward with a predetermined width in a state of being substantially in contact with the outer wall surface 29a of the groove portion 29 from the upper end of the base portion 31, and the groove portion 29 from the upper end of the fixing piece 33. The movable piece 34 is formed so as to extend toward the inner wall surface 29b on the inner side by a predetermined distance, and the tip end thereof is slightly returned to the inner wall surface 29a side.

Further, each inner contact member 36 has a fixed piece 37 extending obliquely upward with a predetermined width in a state of being substantially in contact with the inner wall surface 29b of the groove portion 29 from the lower end of the base portion 31, and the fixed piece 3.
The movable piece 38 is formed so as to extend a predetermined distance from the upper end of 7 toward the outer wall surface 29a of the groove portion 29, and the tip end thereof is slightly returned to the inner wall 29b side.

The movable piece 34 of the outer contact body 32 and the movable piece 38 of the inner contact body 36 have their respective tip portions in the upper case 4.
They are opposed to each other with a sufficiently narrow interval as compared with the thickness of the edge portion of the opening No. 1, and exhibit almost the same restoring force for the same deformation amount.

On the other hand, the upper case 41, like the lower case 21, has a rectangular upper plate 42, a front plate 43 that hangs down from the front edge of the upper plate 42, and side plates 4 that hang down from both side edges of the upper plate 42.
4 and 45 and a rear plate 46 that hangs down from the rear edge of the upper plate 42 form a substantially rectangular box shape with an opening on the lower surface side, and the edges on the opening surface side, that is, the front plate 43 and the side plate 44. ,
45 and the lower edge of the rear plate 46 are the groove 2 of the lower case 21.
It is formed so that it can enter 9 all around.

The lower case 21 and the upper case 41 are opened by the hinge mechanism 50 connecting the rear plates 26 and 46 to each other from the state where their opening surfaces are opened to the outside. The edge portion of the portion penetrates the entire circumference to the bottom of the groove portion 29 of the lower case 21 and is coupled so that the opening surfaces thereof overlap with each other to form an electromagnetically shielded space inside.

Further, the front plate 22 of the lower case 21 and the front plate 42 of the upper case 41 are maintained in such a state that the edge of the opening of the upper case 41 penetrates the entire circumference to the bottom of the groove 29 of the lower case 21. Locking mechanisms 51 and 52 are provided for the operation.

Although the lower case 21 and the upper case 41 are connected to each other through the hinge mechanism 50 here, the lower case 21 and the upper case 41 may be separated from each other like a heavy box. Good.

Shield box 2 constructed in this way
In 0, as shown in FIG. 6, when the upper case 41 is closed, the edge of the upper case 41 enters the groove 29 of the lower case 21 to a predetermined depth.

At this time, each outer contact body 32 provided in the groove portion 29 of the lower case 21 comes into contact with the outer surface 41a of the edge portion of the upper case 41, and the inner wall surface 29a of the groove portion 29 on the outer side. The fixed piece 33 is in close contact with the inner wall surface 29a of the groove 29, and the movable piece 34 is bent toward the outer wall surface 29a of the groove 29. In this elastically deformed state, the upper case 41 is held. 41a on the outer side of the edge of the groove and the groove 29
It is sandwiched between the outer wall surface 29a and the inner wall surface 29a.

Similarly, each inner contact member 36 is connected to the upper case 4 by
1 is in contact with the inner surface 41b of the edge portion of the first groove portion 1 and is placed on the inner wall surface 29b side of the inner portion of the groove portion 29.
9 is in close contact with the inner wall surface 29b of the groove 9, and the movable piece 38 is bent toward the inner wall surface 29b of the groove portion 29. In this elastically deformed state, the inner surface 41b of the edge portion of the upper case 41 and the groove portion. It is sandwiched between the inner wall surface 29b of the inner side of 29.

Therefore, each outer contact body 32 is electrically connected between the outer surface 41a of the edge portion of the upper case 41 and the outer inner wall surface 29a of the groove 29 by the contact pressure generated by the elastic return force. The inner contact bodies 36 are electrically connected to each other by the contact pressure generated by the elastic return force between the inner surface 41b of the edge of the upper case 41 and the inner wall surface 29b of the groove 29.

Therefore, the lower case 21 and the upper case 41
Is in a state in which the edges on the opening side are electrically connected to each other at a short interval over substantially the entire circumference, and the inside surrounded by the lower case 21 and the upper case 41 becomes an electromagnetically shielded space.

The edge of the upper case 41 that has entered the groove 29 of the lower case 21 has an outer contact body 32 and an inner contact body 3.
Since substantially the same elastic return force from 6 is received from both sides, even if the plate thicknesses of the lower case 21 and the upper case 41 are thin, the joints thereof are not deformed and a uniform contact state is obtained over the entire circumference. Since the outer contact body 32 and the inner contact body 36 are in contact with each other so as to sandwich the edge portion of the upper case 41 from both sides, the inductance component of the connection portion is much smaller than that in one-sided contact, and is high up to a high frequency range. A shield effect can be obtained.

In addition, the upper case 41 with respect to the lower case 21
Due to the relative displacement of the
As described above, the edge portion of the upper case 41 enters a position displaced from the central portion of the outer contact body 32 and the inner contact body 36, and the contact pressure of one of the outer contact body 32 and the inner contact body 36 decreases. However, the contact pressure on the other side is increased, and a sufficiently electrically connected state is maintained.

When there is such a displacement, the outer contact body 32 and the inner contact body 3 are provided at the edge of the upper case 41.
Since only a force corresponding to the difference between the contact pressures of 6 is applied, if the positional displacement is not extremely large, the deformation does not occur even when the plate thickness is thin.

In the outer contact body 32 and the inner contact body 36 described above, the tips of the movable pieces 34 and 38 are slightly separated from each other, but as shown in FIG. The tips of the movable pieces 38 of the inner contact body 36 may be brought into contact with each other and elastically deformed by a predetermined amount.

By thus preliminarily elastically deforming, a stronger contact pressure can be obtained against the edge portion of the upper case 41, and the upper case 4 with respect to the lower case 21 described above.
The margin for misalignment of 1 is increased.

Although the outer contact body 32 and the inner contact body 36 are provided so as to face each other, the outer contact body 32 and the inner contact body 36, as shown in a part of FIG. May be offset from each other by ½ of the arrangement pitch.

In this way, the outer contact body 32 and the inner contact body 3
By shifting the position of 6 by 1/2 pitch, it is possible to reduce the non-contact portion of the groove portion 29 in the length direction, and improve the shielding property.

Further, as shown in FIGS. 10A and 10B, the outer contact body 32 and the inner contact body 36 are displaced by 1/2 pitch, and the movable pieces 34, 38 are made to intersect each other. May be.

In this case, the contact pressure can be further increased, and the margin for the above-mentioned displacement can be further increased.

Further, in the above-mentioned shield box 21, a groove portion 29 having a V-shaped cross section is formed along the edge of the lower case 21 on the opening surface side, and the contact body block 30 of the contact block 30 is formed in accordance with the cross sectional shape of the groove portion 29. The shape was almost V-shaped,
This is not a limitation of the present invention. For example, as shown in FIG. 11, a groove forming plate 58 bent in a crank shape is used to form a rectangular cross section (or U) along the inner edge of the opening of the lower case 21. Forming a groove portion 59 of a character shape over the entire circumference,
The contact block 60 may be mounted in the groove 59.

In this case, the contact body block 60 has a structure shown in FIG.
As shown in FIG. 6, the base portion 6 extending in the longitudinal direction of the groove portion 59 bent upward in a U shape so as to be inscribed in the groove portion 59.
1, an outer contact body 62 provided on the outer upper end of the base 61 at a predetermined interval, and an inner contact body 66 provided on the inner upper end of the base 61 at a predetermined interval. The base 61 is fixed to the groove forming plate 58 or each inner wall surface 21a of the lower case 21 by spot welding, screwing, or the like.

Further, the outer contact body 62 extends upwardly in a state of being substantially in contact with the outer wall surface 59a of the groove 59, and the inner wall surface 59b of the groove 59 from the upper end of the fixed piece 63. A predetermined distance to the inner wall surface 5
The inner contact body 66 is composed of a movable piece 64 formed so as to slightly return to the side of the inner wall surface 5 of the groove 59.
9b is formed so as to extend upward in a state of being substantially in contact with 9b, a predetermined distance from the upper end of the fixing piece 67 to the outer wall surface 59a side of the groove 59, and the tip slightly returns to the inner wall surface 59b side. When the edge of the upper case 41 enters the groove 59, the outer contact body 32 and the inner contact body 36 act in the same manner as described above.

Even in this case, as described above, the movable piece 64 of the outer contact body 62 and the movable piece 68 of the inner contact body 66.
The tips of the two are brought into contact with each other and elastically deformed by a predetermined amount to increase the amount of deviation capable of maintaining the double-sided connection state, or by shifting the outer contact body 62 and the inner contact body 66 by 1/2 pitch. The shielding property is improved, or the outer contact body 62 and the inner contact body 66 are shifted by 1/2 pitch, and the movable pieces 64 and 68 are formed so as to intersect with each other to further improve the shield property. be able to.

In the outer contact body 32 and the inner contact body 36 of the contact body block 30, the fixed pieces 33 and 37 and the movable pieces 34 and 38 are formed with the same width.
Like the outer contact body 32 'and the inner contact body 36' of the contact body block 30 'shown in FIG. 3, the fixing pieces 33' and 37 'are made common to the above-mentioned base portion 31 and are continuous in the longitudinal direction of the groove portion 29. The thoracic vertebra fixing pieces 33 ', 37' are formed in the shape of a strip plate.
The movable pieces 34 'and 38' may be extended from the above.

Further, in the contact body block 30 described above, the outer contact body 32 and the inner contact body 36 are integrally formed via the base portion 31, but as shown in FIG. The inner contact body 36 'may be formed separately.

Further, the outer contact body 32 and the inner contact body 36 described above were integrated by connecting the respective fixing pieces 33, 37 by the base portion 31, but, for example, FIG.
Like the outer contact body 62 'and the inner contact body 66' shown in
The tip ends of the movable pieces 64 and 68 are connected to each other with a semi-cylindrical connecting portion 69
It can also be integrated by connecting with.

In the shield box 20 described above, the groove 29 is formed along the inner edge of the lower case 21 on the opening surface side, and the outer contact body 32 and the inner contact body 36 are provided in the groove 29. For example, as shown in FIG. 16, the groove portion 59 is formed on the outer surface of the edge of the lower case 21 on the opening surface side, that is, on the outer peripheral surface side of the front plate 23, the side plates 24, 25, and the rear plate 26 of the lower case 21. However, the contact block 60 described above may be mounted in the groove 59.

In the shield box 20 described above, the outer contact member 32 is provided in the groove 29 provided in the lower case 21.
Although the inner contact body 36 is provided, for example, as shown in FIG. 17, one case (lower case 21 in this example)
Alternatively, the groove 59 may be provided on the first side, and the contact block 70 may be provided on the edge of the other case (the upper case 41 in this example) on the opening surface side.

In this case, the base 71 of the contact block 70
Is fixed to the end surface of the edge of the upper case 41 on the opening side of the upper case 41, and the fixing piece 73 of the outer contact body 72 extends from the outer edge of the base 71 to the outer edge of the edge of the upper case 41. Surface 41a
And extends upward so as to come into contact with
4 extends in a direction away from the outer surface 41a of the edge portion of the upper case 41, enters the groove portion 59 when the cases are joined, and is elastically deformed, and the outer wall surface 59a of the groove portion 59 and the upper case. The outer surface 41a of the edge portion of 41 is electrically connected by an elastic restoring force.

The fixed piece 77 of the inner contact body 76 extends upward from the inner edge of the base 71 so as to contact the inner surface 41b of the edge of the upper case 41, and the movable piece from the tip thereof. 78 is the outer surface 41b of the edge of the upper case 41.
Is extended in a direction away from the inside of the groove portion 59 when the case is joined and elastically deforms, so that a space between the inner wall surface 59b of the groove portion 59 and the inner surface 41b of the edge of the upper case 41 is formed. Electrically connected by elastic return force.

In the shield box 20 described above, the groove 29 is formed on the inner edge of the opening surface of the lower case 21,
The fixing piece 37 of the inner contact body 36 is formed so as to be in contact with the inner wall of the groove portion 29 on the inner side, and the fixing piece 37 is formed when the case is joined.
Although only the movable piece 38 is deformed by restricting the movement of the groove, the groove forming plate 28 is omitted so that the entire inner contact body 36 is elastically deformed when the case is connected, as shown in FIG. May be. In this case, the outer contact body 32
By setting the return force of the movable piece 34 and the return force of the entire inner contact body 36 to be substantially equal to each other, the contact pressure from both sides with respect to the edge portion of the upper case 41 can be equalized.

The shield box 20 described above is
Although the two cases are connected by inserting the edge of the upper case 41 into the opening surface of the lower case 21, the present invention is also applicable to a shield box having a structure in which the edges of both cases are abutted against each other to be connected. Can be applied.

For example, as shown in FIG. 19, the lower case 2
In the case of the structure in which the edge portion on the opening surface side of 1'and the end surfaces of the edge portion on the opening surface side of the upper case 41 'are butted against each other and integrated, the edge portion of one case (here, the lower case 21') The contact block 80 is fixed to the end face.

The contact block 80 has a strip-shaped base 81 fixed to the end face of the lower case 21 'and an outer contact 82 extending upward from the outer edge of the base 81 in a generally S-shape.
And an inner contact body 86 extending upward from the inner edge of the base portion 81 in a substantially S-shape symmetrical with the outer contact body 82.

The outer contact body 82 and the inner contact body 86 are provided so as to be displaced from each other by ½ pitch (not necessarily) as shown in FIG.
When 1'is coupled, it is elastically deformed so as to open on both sides, and due to the elastic restoring force, it comes into contact with the edges 41a, 41b on the opening side of the upper case 41 'from both sides.

The outer contact body 32 and the inner contact body 36 are arranged such that the movable pieces 34 and 38 are in surface contact or line contact with both surfaces of the edge of the upper case 41.
As shown in FIG. 1, two (or even one) projections 90 are provided on the surface of the movable piece 34 (38) along the length direction of the base 31 so that they are surely contacted at two points. Good.

Further, although the outer contact body 32 and the inner contact body 36 described above are constituted by the leaf spring type, as shown in FIGS. 22 (a) and 22 (b), the outer contact body 91 and the inner contact body 36 contact each other. The body 92 may be constructed as a metal spring type. In this case, when the upper case 41 is coupled, the outer contact body 91 and the inner contact body 92 are elastically deformed into an elliptical shape, or are elastically deformed so that the winding diameter is reduced, and the elastic return force of the groove portion 59 of the groove portion 59. The inner wall surfaces 59a, 59a and the both surfaces of the edge portion on the opening surface side of the upper case 41 are electrically connected to each other.

Although the outer contact member 32 and the inner contact member 36 are made of metal, at least one of the outer contact member and the inner contact member may be made of conductive rubber.

Further, the shield box 20 described above is of the vertically openable / closable type constituted by the lower case 21 and the upper case 41. It can be applied similarly.

In the shield box 20 described above, both the lower case 21 and the upper case 41 are box-shaped, but like the shield box 100 shown in FIG.
In the case of a box-shaped lower case 101 whose one surface side is opened and an upper case 121 having a substantially flat plate shape (both sides opening) that covers one surface side of the lower case 101, the opened lower surface side of the upper case 121. The contact block 80 described above may be attached to the edge of the contact block 80, for example.

[0066]

As described above, in the shield box of the present invention, when the pair of cases are combined, the outer contact body and the inner contact body are deformed and the restoring force thereof causes the opening surface of one case. Between the edge on one side and the outer surface of the edge on the opening side of the other case, and on the inside of the edge on the opening side of one case and the edge on the opening side of the other case. Make an electrical connection to the surface.

Therefore, the restoring force of the outer contact body and the inner contact body is applied from both sides to the edge portion on the opening surface side of the other case, so that the case is deformed even when the plate thickness of the case is small. In addition, since the bias of the contact pressure due to the relative displacement of the case can be eliminated and the inductance component of the contact part is reduced, a uniform connection state can be obtained over the entire circumference of the coupling part, and even in the high frequency band. High shielding effect can be obtained.

If the outer contact body and the inner contact body are deformed and are in contact with each other when the pair of cases is in the uncoupled state, the deformation amount can be increased in the coupled state. , The contact pressure is increased and the shield effect is further increased.

Further, when the positions of the movable piece of the outer contact body and the movable piece of the inner contact body are shifted by 1/2 pitch, the contact length can be increased, and the outer contact body, the movable piece, and the inner side can be further extended. When the movable piece of the contact body is crossed with the movable piece, the contact pressure is further increased, the shield effect is enhanced, and the margin for relative positional displacement of the case is further increased.

[Brief description of drawings]

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

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a plan view of a lower case of the embodiment.

FIG. 4 is an enlarged end view taken along line AA of FIG.

FIG. 5 is an enlarged perspective view of a main part.

FIG. 6 is an operation explanatory diagram of the embodiment.

FIG. 7 is an operation explanatory diagram when there is a relative positional shift of the case.

FIG. 8 is a diagram showing an example in which an outer contact body and an inner contact body are in contact with each other in a deformed state in advance.

FIG. 9 is a diagram showing an example in which the outer contact body and the inner contact body are displaced by 1/2 pitch.

FIG. 10 is a diagram showing an example in which an outer contact body and an inner contact body intersect with each other.

FIG. 11 is a diagram showing an example in which the groove is modified.

12 is a diagram showing a main part of FIG.

FIG. 13 is a diagram showing a modified example of the main part.

FIG. 14 is a diagram showing a modified example of the main part.

FIG. 15 is a diagram showing a modified example of the main part.

FIG. 16 is a diagram showing an example in which a groove is provided on the outside.

FIG. 17 is a diagram showing an example in which a groove is provided in one case and a contact body is provided in the other case.

FIG. 18 is a perspective view showing an example in which a groove is omitted.

FIG. 19 is a view showing a contact body used for an end face contact type case.

20 is a plan view of the main part of FIG.

FIG. 21 is a diagram showing a modified example of the main part.

FIG. 22 is a view showing a modified example of the main part.

FIG. 23 is a diagram showing an application example in which one case has a flat plate shape.

FIG. 24 is a diagram showing a structure of a conventional shield box.

FIG. 25 is a view showing a state in which the conventional shield box is deformed.

[Explanation of symbols]

20,100 …… Shield box, 21,101 ……
Lower case, 22 ... bottom plate, 23 ... front plate, 24, 25 ...
... Side plate, 26 ... Rear plate, 28, 58 ... Groove forming plate, 2
9, 59 ... Groove portion, 30, 60, 70, 80 ... Contact block, 31, 61, 71, 81 ... Base portion, 32, 6
2, 72, 82, 91 ... Outer contact body, 33, 63, 7
3 ... Fixed piece, 34, 64, 74 ... Movable piece, 36, 6
6, 76, 86, 92 ... Inner contact body, 37, 67, 7
7 ... Fixed piece, 38, 68, 78 ... Movable piece, 41, 1
21 ... upper case, 42 ... upper plate, 43 ... front plate, 4
4, 45 ... Side plate, 46 ... Rear plate, 50 ... Hinge mechanism, 51, 52 ... Lock mechanism, 69 ... Connecting portion, 90
...... Protrusion

Claims (8)

[Claims] 1. A pair of cases (21, 41) made of a conductive material and having an opening on one surface side are integrally coupled so as to close the opening surfaces of each other to form an electromagnetically shielded space inside. The seal box is made of a conductive material having flexibility, and is deformed when the pair of cases is joined, and the restoring force of the pair causes the edge of the opening surface side of the one case and the opening surface side of the other case. The outer contact body (32) for electrically connecting the outer surface of the edge portion of the body to the outer surface, and a conductive material having flexibility. An inner contact body (36) for electrically connecting between the edge portion on the opening surface side of the one case and the inner surface of the edge portion on the opening surface side of the other case by force. Characteristic shield box. 2. The shield box according to claim 1, wherein the outer contact body and the inner contact body are deformed in a state of being in contact with each other when the pair of cases are in a non-bonded state. . 3. A groove (29) for receiving an edge of the pair of cases on the side of the opening surface of one of the cases is continuously formed at the edge of the case on the side of the opening surface of the other case. The contact body includes an outer surface (41a) of an edge portion on the opening surface side of the other case and an outer surface of the groove portion of the one case when the pair of cases are coupled. It is sandwiched between the wall surface (29a) and deforms,
The restoring force is configured to electrically connect the outer surface of the edge portion on the opening surface side of the other case and the outer inner wall surface of the groove portion, wherein the inner contact body is When a pair of cases are combined, an inner surface (41b) of the edge of the other case on the opening surface side and an inner wall surface (29b) of the inner case of the groove of the one case in the groove portion. It is sandwiched between and deformed,
It is configured to electrically connect the inner surface of the edge portion on the opening surface side of the other case and the inner wall surface of the groove portion on the inner side by the restoring force. Item 1. The shield box according to item 1. 4. The shield box according to claim 3, wherein the outer contact body and the inner contact body are mounted in the groove. 5. The shield according to claim 3, wherein the outer contact body and the inner contact body are attached to an edge portion on the opening surface side of the case where the groove portion is not formed. box. 6. The outer contact body comprises a fixing piece (33) extending in the depth direction of the groove portion while being substantially in contact with an outer wall surface of the groove portion, and an inner side of the groove portion from one end of the fixing piece. A movable piece (34) that extends toward the inner wall surface of the groove and contacts the outer surface of the edge of the opening side of the other case that enters the groove and bends toward the inner wall of the groove inside. ) And the inner contact body has a fixing piece (37) extending in a depth direction of the groove portion in a state of being substantially in contact with an inner wall surface of the groove portion, and a fixing piece (37) extending from one end of the fixing piece to the groove portion. A movable piece that extends to the inner wall surface side of the outer side and contacts the inner side surface of the edge portion on the opening surface side of the other case that enters the groove part and bends to the inner wall surface side of the outer side of the groove part ( 38), at least the movable pieces of the outer contact body and the inner contact body are arranged at a predetermined interval in the longitudinal direction of the groove portion. The shield box according to claim 4, which is formed as follows. 7. The shield box according to claim 6, wherein the movable piece of the outer contact body and the movable piece of the inner contact body are displaced from each other by approximately ½ of the predetermined distance. 8. The shield box according to claim 7, wherein the movable piece of the outer contact body and the movable piece of the inner contact body intersect each other.