JPH088571A - Enclosure for housing printed wiring board - Google Patents

Abstract

PURPOSE:To easily mount and inspect parts by providing an enclosure main body having angular holes above a supporting seat which supports a printed wiring board on the facing surfaces of its framework composed of four side plates and bosses which are put in the holes of the supporting seat after passing through the holes of the printed wiring board, and then, engaging bodies composed of elastic projections to the rectangular holes on the side faces of the enclosure main body. CONSTITUTION:The four sides of a printed wiring board 1 are supported by a lower cover 30 which is put on the lower opening of an enclosure main body 20 and upper rover 40 which is put on the upper opening of the main body 20. Then electronic parts are mounted on the supporting seat 25 of a printed board 1. The covers 40 and 30 respectively have shield springs 45 and 35 constituted by arranging in parallel tongue pieces on their four peripheral edges and press-contacted with the main body 20. The bosses 51 of engaging bodies 50 are passed through the holes 3 of the seat 25 at both end sections of the seat 25 and hold the board 1 put between their lower ends 50A together with the seat 25. The cover 30 is fitted to the main body 20 with screws 29 and the cover 40 is fitted to the main body with the projections 55 of the engaging bodies 50 which are put in the rectangular holes 48. Therefore, the printed wiring board is electromagnetically shielded and parts can be easily mounted and inspected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for accommodating a printed wiring board provided with a high frequency circuit. A housing of an electronic device that accommodates a printed wiring board on which a high-frequency circuit is formed is required to have a structure in which electromagnetic waves do not leak or unwanted electromagnetic waves do not enter.

[0002]

2. Description of the Related Art A sectional view of a conventional printed wiring board housing is shown in FIG. 5, and a perspective view showing the conventional example in a separated form is shown in FIG.

In the drawing, reference numeral 1 is a printed wiring board on which semiconductor components and the like are mounted and a high frequency circuit is provided, and ground patterns 2 are formed along the peripheral edges of both the front and back surfaces of the printed wiring board 1. The housing that holds the printed wiring board 1 horizontally is a frame-shaped housing body 10, a lower cover 16 that closes the lower opening of the housing body 10, and an upper cover that closes the upper opening of the housing body 10. It consists of 17 and.

The housing body 10 is composed of a front side plate 11 and a rear side plate 12 which are opposed to each other, and a pair of side plates 13 orthogonal to the side plates 11 and 12. The side plate 11 is composed of a main plate, an upper edge plate formed by bending an upper edge of the main plate outward at a right angle, and a lower edge plate formed by bending a lower side edge of the main plate outward at a right angle. The main plate is provided with a connector mounting window 15 for mounting a connector.

Further, the upper edge plate is provided with a screw hole for fixing the upper cover 17 to the housing main body 10 by using a screw 17a, and the lower cover 16 is fixed by using a screw 16a on the lower edge plate. A screw hole for fixing to the housing body 10 is provided.

The side plate 12 is composed of a main plate, an edge plate member 12A in which an upper edge of the main plate is bent inward at a right angle, and an edge plate member 12A in which a lower edge of the main plate is bent inward at a right angle. It is U-shaped.

On the other hand, each of the side plates 11, 12 and 13 of the housing body 10 is provided with a U-shaped projection 14 having a U-shape in a plan view so as to project inward by pressing or the like. The end face supports the peripheral portion of the printed wiring board 1.

The lower cover 16 has a rectangular bottom plate which is substantially equal to the shape of the housing body 10 in plan view, and an outer surface of the side plate 13 of the housing body 10 in which the left and right side edges of the bottom plate are bent upward at right angles. It is composed of a closely contacting edge plate and a tongue plate 16A formed by extending the lower cover 16 with a step so that the lower cover 16 is inserted and engaged with the inner surface of the side plate 12 of the housing body 10.

Reference numeral 18 is a shield spring having a rectangular shape substantially equal to the shape of the bottom plate of the lower cover 16 and made of a thin (for example, 0.1 mm) elastic metal plate (for example, a white silver plate). Shield spring
Make the desired cuts on the four side edges of 18 and align the tongue pieces,
Bend each tongue piece diagonally upward so that it has springiness,
The lower end surface of the case body 10 is pressed against the surface.

The shield spring 18 is fixed to the bottom plate of the lower cover 16 by spot welding or the like at several places. The upper cover 17 is configured symmetrically with the lower cover 16, has a ceiling plate, a pair of edge plates, and a tongue plate 17A, and a shield spring 19 is attached to the inside of the ceiling plate.

In order to accommodate and mount the printed wiring board 1 in the above-mentioned housing, first, the L-shaped bent fittings 14A are inserted into the respective U-shaped projections 14, and then the printed wiring board 1 is mounted. It is inserted into the body 10 and placed on the U-shaped projection 14.

Then, the engaging metal fitting 14A is bent into a U shape so that the printed wiring board 1 is sandwiched and then soldered,
The ground pattern portion of the printed wiring board 1, the engaging metal fitting 14A and the inner surface of the side plate are connected via solder.

Insert the tongue plate 16A into the inside of the edge plate member 12A of the housing body 10, fit the lower cover 16 onto the housing body 10, and screw
The lower cover 16 is fixed to the side plate 11 of the housing body 10 using 16a. Further, the tongue plate 17A is inserted inside the edge plate member 12A of the housing body 10, the upper cover 17 is fitted to the housing body 10, and the screws 17
The upper cover 17 is fixed to the side plate 11 of the housing body 10 using a.

The printed wiring board accommodating housing assembled as described above has a shield spring 18 closely attached to the bottom plate of the lower cover 16.
The tongue of the shield spring 19 is in pressure contact with the lower end surface of the housing body 10, and the tongue of the shield spring 19 in close contact with the ceiling plate of the upper cover 17 is in pressure contact with the upper end surface of the housing body 10.

Therefore, the printed wiring board 1 is electromagnetically shielded. Therefore, the electromagnetic waves emitted from the high frequency circuit of the printed wiring board will not leak out of the housing. Further, electromagnetic waves from the outside do not enter the housing, and the high frequency circuit of the printed wiring board 1 does not malfunction.

[0016]

By the way, the conventional printed wiring board housing is provided with a U-shaped projection on the side plate of the housing body.
A printed wiring board is placed on the U-shaped protrusions and soldered. Also, the upper cover is fixed to the housing body with screws.

Therefore, there is a problem in that it takes time to mount and assemble the printed wiring board. In addition, at the time of maintenance / inspection of the printed wiring board, the printed wiring board must be removed by melting the solder, which causes a problem of troublesome maintenance / inspection work.

The present invention was created in view of the above point, is shielded against electromagnetic waves, is easy to mount and assemble printed wiring boards, and is easy to maintain and inspect. The purpose is to provide a housing.

[0019]

In order to achieve the above object, the present invention supports a peripheral edge of a printed wiring board 1 on side plates 21 facing each other in a frame shape having four side plates, as illustrated in FIG. The housing body 20 having the support seat 25 and the square hole 28 provided above the support seat 25, and the boss 51 that penetrates the hole 3 of the printed wiring board 1 and is fitted into the hole 26 of the support seat 25 in the lower end surface 50A. Has and square hole 28 on the side
An engaging body (50) having an elastic protrusion (55) that engages with.

Further, the lower cover 30 is fitted in the lower opening of the housing body 20 in the shape of a shallow box having edge plate members on four sides, and the central portion is in close contact with the inner side of the bottom plate of the lower cover 30, and the casing is formed around the four edges. Body 20
A shield spring 35 in which the tongue pieces that are pressed against the lower end surface of
Shallow box shape with edge plate members on four sides, which is attached to the edge plate member 50
The upper cover 40 fitted into the upper opening of the housing body 20 having the square hole 48 into which the projection 55 of the upper cover 40 is fitted, and the central portion of the upper cover 40 are in close contact with the inside of the ceiling plate of the upper cover 40, and the housing body 20 is provided at the four edges. And a shield spring 45 having tongue pieces arranged in parallel with each other in pressure contact with the upper end surface of the shield spring.

The engaging member 50 holds and holds the printed wiring board 1 between the lower end surface 50A and the supporting seat 25 of the housing body 20.
The lower cover 30 is detachably fitted to the housing main body 20 by using screws 29, and the upper cover 40 has a square hole 48 as an attachment body.
It is configured to be detachably fitted to the housing main body 20 by being engaged with the protrusion 55 of the 50.

As illustrated in FIG. 3, it is assumed that a leaf spring 60 is interposed between the engaging body 50 and the side plate 21 of the housing body 20. As illustrated in FIG. 4, a frame-shaped casing main body 20 in which a plurality of upper and lower square holes 28 are arranged and punched in the opposing side plates 21.
-2, and an attachment body 50 having a boss 51 penetrating the hole of the printed wiring board 1 on the upper end surface and an elastic projection 55 engaging the square hole 28 below the housing body 20-2 on the side surface. , The boss of the fastening body 50 on the lower end surface
Another engaging body having a hole 51-2 for engaging with 51 and having an elastic projection 55 for engaging with the square hole 28 above the casing body 20-2 on the side surface.
50-2, and.

In addition, in a shallow box shape having edge plate members on four sides, the edge plate member is provided with a rectangular hole 48 for engaging with the projection 55 of one of the fastening members 50, and is provided in the lower opening of the housing body 20-2. Lower cover 30-2 to be fitted
And a shield spring 35 whose central portion is in close contact with the inside of the bottom plate of the lower cover 30-2 and whose tongues press-contacting the lower end surface of the housing body 20-2 are arranged in parallel at four edges, and edge plate members on four sides. A shallow box-shaped upper cover 40 fitted into the upper opening of the housing body 20 having a rectangular hole 48 into which the protrusion 55 of the other fastening member 50 engages with the edge plate member, and the central portion of the upper cover 40 A shield spring in which the tongue pieces that are in close contact with the inside of the ceiling plate and are in pressure contact with the upper end surface of the housing main body 20 are arranged along the four edges.
And

The fastening members 50 and 50-2 sandwich and hold the printed wiring board 1 between the upper end surface of the fastening member 50 and the lower end surface of the other fastening member 50-2. -2 is that the square hole 48 is detachably fitted to the housing main body 20 by engaging the protrusion 55 of the lower engaging body 50, and the upper cover 40 has the square hole 48 located above. It is configured to be detachably fitted to the housing body 20 by being engaged with the protrusion 55 of the engaging body 50-2.

Further, the side surfaces of the engaging members 50, 50-2 and the main body 20 of the housing.
A leaf spring is interposed between the side plate 21 and the side plate 21.

[0026]

According to the present invention, the tongue of the shield spring closely attached to the lower cover is pressed against the lower end surface of the frame-shaped casing body, and the tongue of the shield spring closely attached to the upper cover is frame-shaped casing. It is pressed against the bottom surface of the body.

Therefore, the printed wiring board housed in the housing is electromagnetically shielded. On the other hand, the printed wiring board is held horizontally in the housing by engaging the protrusions of the engaging body with the square holes provided in the side plate of the housing body. Further, the printed wiring board can be removed from the housing by releasing the engagement between the protrusion and the square hole. The lower cover and the upper cover are detachably fitted to the housing body.

Therefore, the work of mounting and assembling the printed wiring board is easy, and the work of maintenance and inspection of the printed wiring board is easy. By interposing a leaf spring between the side surface of the fastening body and the side plate of the housing body, the fastening body is securely fastened to the housing body, and the housing body presses the printed wiring board with a strong force. As a result, the reliability of holding the printed wiring board is improved.

According to the third aspect of the invention in which the printed wiring board is sandwiched between the upper and lower engaging members, both the lower cover and the upper cover are fitted to the housing body without using screws.
Therefore, the work of mounting and assembling the printed wiring board becomes easier.

[0030]

The present invention will be described in detail with reference to the drawings. The same reference numerals indicate the same objects throughout the drawings.

FIG. 1 is a diagram of an embodiment of the present invention, (A) is a sectional view, (B) is a perspective view of a fastening body, and FIG. 2 is a perspective view showing an embodiment of the present invention in a separated form. FIG. 3 is a view of another embodiment of the present invention, (A) is a sectional view, (B) is a perspective view showing the relationship between the engaging body and the leaf spring, and FIG. 4 is a view of the present invention. It is sectional drawing of other Example.

In FIGS. 1 and 2, reference numeral 1 denotes a printed wiring board on which a semiconductor component or the like is mounted and a high frequency circuit is provided, and the back surface of the four corners of the printed wiring board 1 (the front and back surfaces in the case of FIG. 4) is grounded. The pattern 2 is formed. Holes 3 are formed at the four corners of the printed wiring board 1.

The housing that holds the printed wiring board 1 horizontally is a frame-shaped housing body 20, a lower cover 30 that covers the lower opening of the housing body 20, and an upper opening of the housing body 20. Top cover 40
It consists of and.

The housing body 20 is composed of a pair of side plates 21 facing each other and a pair of other side plates 22 facing each other. Each of the side plates 21 near the four corners, that is, on both sides of the pair of side plates 21 facing each other has a side plate. Cut and raise a part at a right angle to the inside to support the middle part of the side plate 21
25 are provided. The support seats 25 support the four corners of the printed wiring board 1.

A hole 26 corresponding to the hole 3 of the printed wiring board 1 is formed at the center of each support seat 25. Further, on the side plates 21 facing each other, a square hole 28 into which a projection 55 of an engaging body 50 described later engages is formed above each supporting seat 25.

On the other hand, the central portion of the lower edge of each side plate 21 is cut and raised at a right angle to the inside, and a fixing seat 27 is provided which coincides with the lower end surface of the housing body 20, and a screw 29 is attached to the fixing seat 27. A screw hole for fixing the lower cover 30 is provided by using this.

Numeral 50 has a boss 51 which penetrates the hole 3 of the printed wiring board 1 and fits into the hole 26 of the support seat 25 on the lower end surface 50A, and has an elastic projection 55 which is engaged with the square hole 28 on the side surface. , Is a substantially prismatic fastening body.

The material of the fastening body 50 may be elastic plastic or the like. As shown in detail in FIG. 1 (B), the protrusion 55 is a protrusion main plate 55D having a rectangular cross section that is long in the left-right direction and protrudes at a right angle to the side surface of the engaging body 50, and the tip portion of the protrusion main plate 55D. The lower jaw 55A protrudes downward and the upper jaw 55B protrudes upward at the tip of the protrusion main body plate 55D.

The distance between the inner surface of the lower jaw 55A and the side surface of the fastening body 50 (that is, the substantial protrusion amount of the lower jaw 55A) is greater than (the thickness of the side plate 21 + the thickness of the edge plate member of the upper cover 40). Slightly larger.
The distance between the inner surface of the upper jaw 55B and the side surface of the fastening body 50 (that is, the substantial protrusion amount of the upper jaw 55B) is slightly larger than the plate thickness of the side plate 21.

The surface formed by the back surface of the upper jaw 55B (side surface on the half body side with the projection body plate 55D) and the back surface of the lower jaw 55A (side surface on the half body side with the projection body plate 55D) projects on the side of the lower jaw 55A. It has become an inclined surface.

The length of the protrusion main body plate 55D in the left-right direction is the square hole 28.
Is slightly smaller than the length, and the vertical width is sufficiently smaller than the height of the square hole 28. The lower cover 30 is a shallow box shape having a bottom plate and edge plate members on four sides of the bottom plate, and has a size and shape to be fitted into the lower opening of the housing body 20.

The bottom plate of the lower cover 30 is provided with a hole into which the neck portion of the screw 29 is inserted at a position corresponding to the screw hole formed in the fixing seat 27 of the housing body 20. Reference numeral 35 is a shield spring which is a rectangular shape substantially equal to the shape of the bottom plate of the lower cover 30, and is made of a thin (for example, 0.1 mm) elastic metal plate (for example, a white plate).

Make desired cuts on the four side edges of the shield spring 35, arrange the tongues in parallel, and bend the tongues obliquely upward so as to have a spring property and press-contact with the lower end surface of the housing body 20. I have to.

The shield spring 35 is fixed to the inner surface of the bottom plate of the lower cover 30 by being spot-welded at several places other than the tongue piece. The upper cover 40 is a shallow box shape having a ceiling plate and edge plate members on four sides of the ceiling plate, and has a housing body.
It has a size and shape that fits into the upper opening of 20.

The edge plate member of the upper cover 40 is engaged with the projection 55 at a position facing the square hole 28 of the housing body 20 (specifically, a position slightly above the square hole 28). Rectangular hole
48 is provided.

Reference numeral 45 denotes a shield spring having a rectangular shape substantially equal to the shape of the ceiling plate of the upper cover 40 and made of a thin (for example, 0.1 mm) elastic metal plate (for example, a white silver plate). Make desired cuts on the four side edges of the shield spring 45 and arrange the tongues in parallel,
Bend each tongue piece diagonally upward so that it has springiness,
The upper end surface of the housing body 20 is pressed against the surface.

The shield spring 45 is fixed to the inner surface of the bottom plate of the upper cover 40 by being spot-welded at several places other than the tongue. In order to accommodate and mount the printed wiring board 1 in the housing as described above, first, the lower cover 30 is fitted into the lower opening of the housing body 20, and the lower cover 30 and the fixing seat 27 are attached using the screws 29. To fix. As a result, the shield spring 35
The juxtaposed tongues are pressed against the lower end surface of the housing body 20.

Next, the printed wiring board 1 is horizontally inserted into the housing body 20, and its four corners are placed on the support seat 25. The boss 51 of the engaging body 50 is fitted into the hole 3 of the printed wiring board 1 and the tip thereof is used as a support seat.
After fitting and engaging with the hole 26 of 25, the engaging body 50 is raised to the side plate 21 side, and the protrusion 55 is pushed into the square hole 28 side.

As a result, the projection body plate 55D of the projection 55 is bent, and the upper jaw 55B and the lower jaw 55A project outside the housing body 20. The projection body plate 55D returns by releasing the hand, and the upper jaw
55B is locked to the outside of the side plate 21, and the projection body plate 55
The upper end surface of D is pressed against the upper end surface of the square hole 28. Therefore, the lower end surface 50A of the fastening body 50 presses the printed wiring board 1.

As a result, the printed wiring board 1 is supported by the support seat 25.
It is sandwiched by the engaging body 50 and horizontally held in the housing body 20. The ground pattern 2 of the printed wiring board 1 is a supporting seat.
It is connected to the housing body 20 via 25, and the ground ground of the printed wiring board 1 is connected to the housing.

Next, the upper cover 40 is pressed downward in accordance with the upper portion of the housing body 20. This makes the edge plate member the lower jaw
55A is deflected to the side plate 21 side, the inner side surface slides on the back surface of the protrusion 55 and descends, the protrusion 55 is fitted into the square hole 48, and the deflection of the lower jaw 55A is restored.

Therefore, the square hole 48 engages with the protrusion 55, the edge plate member of the upper cover 40 comes into close contact with the side plate 21, and the upper cover 40 is fitted into the housing body 20. When the square hole 48 is engaged with the protrusion 55 in this manner, the tongue pieces of the shield spring 45 juxtaposed with each other are connected to the housing body 20.
Press on the top surface of the.

The printed wiring board accommodating housing assembled as described above has a shield spring 35 closely attached to the bottom plate of the lower cover 30.
Of the shield spring 45, which is in close contact with the ceiling plate of the upper cover 40, is in pressure contact with the upper end surface of the housing body 20.

That is, since the printed wiring board 1 is electromagnetically shielded, the electromagnetic waves emitted from the high frequency circuit of the printed wiring board will not leak out of the housing. Further, electromagnetic waves from the outside do not enter the housing, and the high frequency circuit of the printed wiring board 1 does not malfunction.

Reference numeral 60 shown in FIG. 3 is a substantially L-shaped member composed of a spring body plate curvedly projecting from the side surface of the engaging body 50 and a seat plate in close contact with the lower end surface 50A of the engaging body 50. For example, it is a leaf spring made of a stainless steel plate or the like.

The seat plate of the leaf spring 60 has a hole into which the boss 51 is fitted.
61 is provided. The leaf spring 60 is attached to the housing body 20 such that the leaf spring 60 is interposed between the fitting body 50 and the side plate 21 of the housing body 20.

Therefore, the protrusion 55 of the engaging body 50 is more securely engaged with the housing body 20, and the elastic force of the leaf spring 60 causes the engaging body 50 to press the printed wiring board 1 with a strong force. .
Therefore, the reliability of holding the printed wiring board is improved, and the reliability of the connection between the ground pattern 2 and the housing body 20 is improved.

In the case body 20-2 shown in FIG. 4, a plurality of upper and lower square holes 28 are formed in the side plates 21 facing each other in an array. The engaging body 50 that supports the lower surface of the printed wiring board 1 has a boss 51 that penetrates the hole of the printed wiring board 1 on the upper end surface and is attached to the square hole 28 below the housing body 20-2 on the side surface. It has elastic projections 55.

An attachment body 50-2 for pressing the upper surface of the printed wiring board 1
Has a hole 51-2 that engages with the boss 51 of the engaging body 50 on the lower end surface, and an elastic protrusion 55 that engages with the square hole 28 above the housing body 20-2 on the side surface.

The fastening body 50 and the fastening body 50-2 are electrically conductive on the outer peripheral surface thereof so that the ground pattern 2 of the printed wiring board 1 and the housing body 20-2 can be electrically connected. It is coated with metal.

The lower cover 30-2 fitted in the lower opening of the housing body 20-2 has a shallow box shape having edge plate members on four sides, and the protrusion of one of the fastening members 50 is attached to the selected edge plate member. Square hole 48 engaging 55
Is provided.

On the inside of the bottom plate of the lower cover 30-2, shield springs 35 are fixed by spot welding or the like, in which four tongue pieces that are in pressure contact with the lower end surface of the case body 20-2 are arranged in parallel at four peripheral edges. The upper cover 40 fitted in the upper opening of the housing body 20-2 has a shallow box shape having edge plate members on four sides, and is engaged with the protrusion 55 of the other attachment body 50-2 on the selected edge plate member. A matching square hole 48 is provided.

On the inner side of the ceiling plate of the upper cover 40, shield springs 45 are fixed by spot welding or the like, in which four tongue pieces that are in pressure contact with the upper end surface of the housing body 20-2 are juxtaposed along the four edges. To mount the printed wiring board 1 in such a casing, first, the protrusion 55 of the engaging body 50 is engaged with the lower square hole 28 of the casing body 20-2, and then the lower cover 30- 2 to the bottom of the housing body 20-2 to engage the square hole 48 with the protrusion 55, and the lower cover 30-2 to the housing body.
Fit in 20-2.

Next, the holes 3 of the printed wiring board 1 are fitted into the bosses 51 of the corresponding fastening body 50 so that the printed wiring board 1 is horizontally placed.
Place on top of 50. Then, the hole 51-2 of the engaging body 50-2 is fitted into the boss 51, and as described with reference to FIG. 1, the protrusion 55 of the engaging body 50-2 is provided above the housing body 20-2. Attach to square hole 28.

Next, the upper cover 40 is fitted into the upper opening of the housing body 20-2. The leaf spring 60 shown in FIG. 3 may be interposed between the engaging members 50, 50-2 and the side plate 21.

As described above, the structure in which the printed wiring board 1 is sandwiched between the upper and lower engaging bodies 50 and 50-2 allows the housing main body 20-2 to be used without using screws for both the lower cover and the upper cover. Can be fitted to. Therefore, mounting the printed wiring board
Assembly work becomes easier.

As shown in FIG. 4, the one provided with a pair of upper and lower fasteners uses a fastener slightly higher than the height of the fastener and the height of the mounted component to form a printed wiring for double-sided mounting. Adapting to the plate also has the advantage that the height of the housing does not need to be unnecessarily increased.

[0068]

Since the present invention is constituted as described above, it has the following effects.

The printed wiring board housed in the housing is electromagnetically shielded. The mounting and assembling work of the printed wiring board is easy, and the maintenance and inspection work of the printed wiring board is easy.

By interposing a leaf spring between the side surface of the engaging body and the side plate of the housing body, the reliability of holding the printed wiring board and the reliability of the connection between the ground pattern and the housing are improved. .

With the pair of upper and lower engaging members, the cover can be fitted to the housing body without using screws, so that the work of mounting and assembling the printed wiring board is further facilitated.

[Brief description of drawings]

FIG. 1 is a diagram of an embodiment of the present invention, in which (A) is a sectional view and (B) is a sectional view.
[Fig. 3] is a perspective view of a fastening body.

FIG. 2 is a perspective view showing an embodiment of the present invention in a separated form.

FIG. 3 is a diagram of another embodiment of the present invention, in which (A) is a sectional view,
(B) is a perspective view showing the relationship between the engaging body and the leaf spring.

FIG. 4 is a sectional view of still another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional example.

FIG. 6 is a perspective view showing a conventional example in a separated form.

[Explanation of symbols]

 1 Printed wiring board 2 Ground pattern 3,26,61 hole 10,20,20-2 Housing body 16,30,30-2 Lower cover 17,40 Upper cover 18,19,35,45 Shield spring 21,22 Side plate 25 Support seat 27 Fixed seat 48 Square hole 50, 50-2 Engagement body 51 Boss 51-2 hole 55 Protrusion 55A Lower jaw 55B Upper jaw 60 Leaf spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Minowa 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Masahiko Kaneko 1015, Kamikodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (4)

[Claims] 1. A frame having four side plates, a supporting seat for supporting a peripheral edge of the printed wiring board on opposing side plates, a casing body having a square hole above the supporting seat, and the printed wiring on a lower end surface. An engaging body having a boss penetrating the hole of the plate and fitted into the hole of the support seat, and an engaging body having elastic projections engaging with the square hole on the side surface, and so as to close the lower opening of the housing body, Shield spring in which a shallow box-shaped lower cover having edge plate members on four sides, a central portion of the lower cover tightly adheres to the inside of the bottom plate of the lower cover, and four tongue pieces that are in pressure contact with the lower end surface of the housing main body are arranged in parallel on the four peripheral edges. A shallow box-like shape having edge plate members on four sides, the edge plate member being provided with a square hole for engaging with a protrusion of the engaging body, and an upper cover for closing an upper opening of the housing body; And a shield spring in which a tongue piece is in close contact with the inner side of the ceiling plate of the upper cover, and the tongues press-contacted to the upper end surface of the casing body are arranged in parallel at four peripheral edges. The engaging body holds and holds the printed wiring board between the lower end surface and the support seat of the housing body, and the lower cover is detachably fitted to the housing body using screws. The printed wiring, wherein the upper cover is detachably fitted to the housing main body by engaging the square hole with the protrusion of the engaging body. Board housing. 2. The printed wiring board accommodating housing according to claim 1, wherein a leaf spring is interposed between a side surface of the fastening body and a side plate of the housing body. 3. A frame-shaped casing main body having a pair of upper and lower rectangular holes formed in opposing side plates, and a boss penetrating through the holes of the printed wiring board on the upper end surface thereof, and the casing on the side surface. An engaging body having an elastic protrusion that engages with the lower rectangular hole of the main body, a hole that engages with the boss of the engaging body on the lower end surface, and a square hole above the housing main body on the side surface. Another fastening body having elastic projections for fastening, and a shallow box shape having edge plate members on four sides, and the edge plate member having a square hole for engaging one of the projections of the fastening body, A lower cover that closes a lower opening of the housing body, a shield spring in which a central portion is in close contact with an inner side of a bottom plate of the lower cover, and four tongue pieces that are in pressure contact with a lower end surface of the housing body are arranged in parallel at four peripheral edges; An upper cover for closing an upper opening of the housing body, which is a shallow box shape having an edge plate member on a side and has a square hole for engaging the protrusion of the other fastening member on the edge plate member. And a shield spring having a central portion in close contact with the inside of the ceiling plate of the upper cover, and four tongue pieces arranged in parallel with the upper end surface of the housing body in parallel with each other at four peripheral edges. A printed wiring board is sandwiched and held by an upper end surface of one of the fastening members and a lower end surface of the other fastening member, and the lower cover holds the square hole of the lower fastening member. The upper cover is detachably fitted to the main body of the housing by engaging the projection, and the upper cover is formed by fitting the square hole to the projection of the upper fitting body. A printed wiring board housing, which is detachably fitted to a body. 4. The printed wiring board accommodating housing according to claim 3, wherein a leaf spring is interposed between a side surface of each engaging member and a side plate of the housing body.