JP2003298246A - Case for electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a case for electronic device which is highly effective in shielding, lightweight, hardly rusted, and easy to conduct maintenance. <P>SOLUTION: This case for electronic device is for housing a high-frequency circuit board 5 and other circuit boards. The case is made of an electrically conductive material, and comprises a case body 2 of a box shape with an opened front face and a cover 4 that covers the opened face of the case body 2, wherein a frame 3 is provided, which is made of an electrically conductive material, corresponds to outer dimensions of the high-frequency circuit board 5, and has an opened upper face and an opened bottom face. Concave grooves 2b, 42e are respectively arranged on the inner-face side of the case body 2 and on the inner-face side of the cover 4 at positions that correspond to the edges of the openings of the frame 3 such that the inner-face side of the case body 2 engages with the edge 37 of the bottom-face opening of the frame 3 and the inner-face side of the cover 4 engages with the edge 36 of the upper-face opening of the frame 3. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case mainly used for an electronic device connected to an antenna, such as a booster for television reception, a converter, a mixer, and the like. 2. Description of the Related Art Conventionally, as a case for electronic equipment (hereinafter abbreviated as a case), a high-frequency circuit in the case is prevented from being affected by various kinds of noise from outside the case, and a case outside the case. In order to prevent inadvertent leakage of high-frequency signals, the entire case is made of a metallic material, or the case is made of a synthetic resin material, and the high-frequency circuit board is wrapped in a metallic material to form a unit. It has been known. However, the conventional metallic case has a problem of rust. In particular, in the case of a metal case provided with a cover opening / closing mechanism, when the hinge part is rusted, it becomes difficult to open the cover and inspect and maintain the internal electronic devices. In addition, since the metal case is heavy, it is inconvenient to handle, and there are cases where the supporting columns and wall surfaces need to be reinforced.
On the other hand, in the case of a unitized high-frequency circuit board, the number of manufacturing steps is increased, and there is a problem that maintenance of the circuit board is difficult. In view of the above problems, an object of the present invention is to provide a case for an electronic device which has a high shielding effect, is lightweight, hardly rusts, and is easy to maintain. [0004] In order to solve the above-mentioned problems, an invention of claim 1 is an electronic equipment case for housing a high-frequency circuit board and another circuit board, wherein the electronic equipment case is A box-shaped case body having a front opening, formed of a material that can be electrically conducted, and a cover covering the opening surface of the case body. The top and bottom surfaces correspond to the external shape of the high-frequency circuit board. An open frame formed of an electrically conductive material, wherein an inner surface of the case body and an open end of a bottom surface of the frame are fitted to each other, and an inner surface of the cover and the frame; A concave groove is provided at a position on the inner surface side of the case body and the cover opposite to the open end of the frame so that the open end of the upper surface of the body is fitted. An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially exploded perspective view of a booster for television joint reception exemplified as an electronic device case. FIG. 2 is a perspective view of a television receiving booster. FIG. 3 is a perspective view of a frame housing the high-frequency circuit board. FIG. 4 is a sectional view taken along line AA ′ in FIG. FIG. 5 is a sectional view taken along the line BB ′ in FIG. FIG. 6 is a partially exploded perspective view of an example of a case of a conventional electronic device. The case 1 includes a case body 2 and a cover 4 that covers the case body 2.
And the power supply circuit board 6 are housed inside the case body 2. The case 1 is mounted on a well-known support column for mounting an antenna, a plate wall behind a distribution box, or the like, with the upper right direction of FIG. 1 upward and the lower left direction downward. The case body 2 is formed in a box shape with a front opening in which a side plate portion 22 is provided at each longitudinal edge of a rectangular back plate portion 21, and a top plate portion 23 and a bottom plate portion 24 are provided at respective upper and lower side edges. The material is
For example, it is formed of a conductive material such as aluminum die casting, a conductive synthetic resin material, or a synthetic resin material having a surface plated or coated with a conductive material. A flange 25 is formed on the periphery of the rear plate 21 so as to abut the opening edge of the cover 4.
A plurality of plug projecting holes 26 for projecting the F-type plug attached to the frame 3 are formed. 27 is the lower cover 42
A screw hole for fixing the booster, 28 is a notch for screw insertion for mounting the booster on a wall surface, and 29 is a rear plate 2
1 is a concave groove provided on the inner surface side, and is formed from the bottom plate portion 24 of the case main body 2 to the power supply circuit board 6 for accommodating the AC cord 7. The frame 3 corresponds to the outer shape of the high-frequency circuit board 5 and is formed in a frame shape with an open top and bottom, and is made of a highly conductive material such as aluminum, copper, or iron plate. Pressed. Reference numeral 33 denotes a bottom plate portion of the frame 3, to which an F-type plug 34 is fixed. The method of fixing the F-type plug 34 may be a method using a nut or a method of fixing it by press-fitting, regardless of the method. Although the present application shows an example in which the F-type plug 34 is fixed to the frame 3,
The F-type plug 34 may be fixed to the high-frequency circuit board 5. Reference numerals 31 and 32 denote side plate portions of the frame 3, and the side plate portions 31,
32, a plurality of protrusions 3d are provided. After the high-frequency circuit board 5 is mounted on the protrusion 3d from the upper surface side of the frame 3, the ground of the high-frequency circuit board 5 and the protrusion 3d are soldered. As a result, the ground of the high-frequency circuit board 5 and the frame 3 are electrically connected. The frame 3 containing the high-frequency circuit board 5 is attached to the case body 2 in a state where the tip of the F-type plug 34 fixed to the frame 3 projects from the plug protrusion hole 26 of the case body 2. At this time, a concave groove 2b is formed on the inner surface side of the case body 2 so as to face the opening end 37 on the bottom surface side of the frame body 3 so that the frame body 3 fits into the concave groove 2b. Mounted. As described above, the case body 2 is formed of a conductive material such as aluminum die-cast, a conductive synthetic resin material, or a synthetic resin material having a surface plated or coated with a conductive material. Frame 3 and case body 2
Are electrically conductive. Further, a plurality of mounting pieces 3a are formed on the side plate portion 31, and the frame 3 is provided with the mounting pieces 3a.
Screw holes 3b formed on the rear plate 2 of the case body 2
The mounting screw 3c is inserted into the screw hole provided in the mounting
It is fixed by screwing with. In the embodiment of the present application, the mounting piece 3a is formed on the side plate 31 of the frame 3, but the mounting piece 3a is formed not only on the side plate 31 but also on the side plate 32. Case body 2
A mounting portion 2c may be provided at a position on the back plate portion 21 opposite to the mounting piece 3a formed on the side plate portion 32, and the frame 3 may be fixed to the case body 2 by screwing. . As described above, the ground of the high-frequency circuit board 5, the frame 3, and the case body 2 are electrically connected to each other, and the back surface of the high-frequency circuit board 5 is shielded. Although the method of fixing the high-frequency circuit board 5 and the frame 3 is an example of soldering,
A mounting piece may be provided on the frame 3 and the high-frequency circuit board 5 may be screwed to the frame 3. As shown in FIG. 1, the cover 4 includes an upper cover 41 covering the power supply circuit board 6 and a lower cover 42 covering the high-frequency circuit board 5 so that maintenance can be performed for each circuit board. . The lower cover 42 is provided with a pair of side plate portions 42b on opposite sides of a rectangular front plate portion 42a.
It is formed of a synthetic resin material having conductivity, a synthetic resin material plated or painted with a conductive material, or the like, in a substantially U-shaped cross section formed with. And the case body 2
When the lower cover 42 is covered, the inner surface side of each side plate portion 42b of the lower cover 42 is in close contact with the outer surface side of the side plate portion 22 of the case body 2, and the edge of the side plate portion 42b is
5 Closely contact and waterproof. Reference numeral 42d denotes a mounting screw for fixing the lower cover 42 to the case main body 2;
The lower cover 42 is screwed into the screw holes 27 provided in the lower cover 42.
Is fixed to the case body 2. The lower cover 42 is mounted so that the mounting screw 42d side is opened forward with the hinge 2a provided on the side plate 22 of the case body 2 as a fulcrum. On the inner surface side of the front plate portion 42a of the lower cover 42,
The concave groove 42e corresponding to the shape of the opening end on the upper surface side of the frame 3
Are formed integrally with the lower cover 42, and the lower cover 4
2 is fixed to the case body 2 with the mounting screws 42d,
The open end on the upper surface side of the frame 3 and the concave groove 42e are configured to fit together. At this time, the lower cover 42 is made of a synthetic resin material having conductivity as described above, or
Since the lower cover 42 and the frame 3 are electrically connected to each other because they are made of a synthetic resin material plated or painted with a conductive material, the front side of the high-frequency circuit board is shielded. The upper cover 41 is a box having a back plate and a bottom plate that have side plates 41b formed on a pair of opposing sides of the rectangular top plate 41c and a front plate 41a formed on the front edge. It is injection molded with a synthetic resin material. Then, when placed on the case body 2, the inner surfaces of the side plate portions 41 and the top plate portion 41 c are in close contact with the outer surface sides of the side plate portions 22 and the top plate portion 23 of the case body 2, and the edge of the side plate portion 41 b is It is in close contact with the flange 25 of the case body 2 to achieve waterproofing. Peripheral edge 41d of the open lower surface of upper cover 41
Is in close contact with a flange portion 42c formed on the lower cover 42 so that rainwater does not enter the boundary between the upper cover 41 and the lower cover 42. As described above, the case body 2 and the lower cover 4
2 is made of a conductive material such as aluminum die casting, a conductive synthetic resin material, or a synthetic resin material having a surface plated or coated with a conductive material, and the upper cover 41 is also made of a synthetic resin material. No rust occurs because it is formed of Further, since the hinge portion 2a is also made of synthetic resin, the lower cover 42 does not become unable to open and close. Further, since the cover 4 is made of a synthetic resin material, the weight is reduced as compared with the metal case, and the work of attaching the cover 4 to the plate wall surface behind the distribution box is facilitated. The shield case for accommodating the high-frequency circuit board 5 does not need to be unitized as in the conventional shield case 8 shown in FIG. The ends of the lower cover 42 and the grooves 3e and 2b provided on the inner surface side of the case body and having a size opposite to the shape of the opening end of the frame 3 are fitted to the frame 3,
Since the shield of the high-frequency circuit board 5 is detached, the weight of the case can be reduced and the maintenance can be facilitated. FIG. 1 shows an example, and a packing material made of rubber, vinyl chloride, or the like may be attached to the brim portion 25 of the case body 2, for example, to ensure the waterproofness. Further, if further shielding properties are required, a concave groove 42e provided on the inner surface side of the case body 2 and the lower cover 2,
The shape may be appropriately changed, for example, a conductive packing material may be attached to 2b. Further, the case of this embodiment can be used for other electronic devices such as a mixer and a converter. As described above in detail, according to the first aspect of the present invention, there is provided an electronic equipment case for housing a high-frequency circuit board and another circuit board, wherein the electronic equipment case is an electric equipment case. A box-shaped case body having a front opening and a cover covering the opening surface of the case body, and having an upper surface and a bottom surface corresponding to the outer shape of the high-frequency circuit board. An inner surface of the case body and an opening end of a bottom surface of the frame are fitted to each other, and an inner surface of the cover and an upper surface of the frame are formed. A concave groove is provided at a position on the inner surface side of the case body and the cover opposite to the opening end of the frame so that the opening end of the case fits with the opening end of the case body. An equipment case can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially exploded perspective view of a booster for television joint reception exemplified as an electronic device case. FIG. 2 shows a perspective view of a television receiving booster. FIG. 3 is a perspective view of a frame housing a high-frequency circuit board. FIG. 4 is a sectional view taken along the line AA ′ in FIG. 2; FIG. 5 is a sectional view taken along the line BB ′ in FIG. 2; FIG. 6 is a partially exploded perspective view illustrating a conventional booster for television reception, which is exemplified as a case of an electronic device. DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Case body, 2a ... Hinge part, 2b ... Concave groove, 21 ... Back plate part, 22 ... Side plate part, 23 ... Top plate part, 2
4 ... Bottom plate part, 25 ... Flange part, 26 ... Connecting protruding hole, 27 ...
Screw hole, 28 ... Notch, 29 ... Groove, 3 ... Frame, 3a
... mounting pieces, 3b ... screw holes, 3c ... mounting screws, 3d ... protruding parts, 31 ... side plate parts, 32 ... side plate parts, 33 ... bottom plate parts, 3
4 F-type plug, 35 open end, 36 open end, 4 cover, 41 upper cover, 41 a front plate, 41 b side plate, 41 c top plate, 41 d peripheral edge, 41 e wall surface Mounting part, 42 ... Lower cover, 42a ... Front plate part, 42b ... Side plate part, 42c ... Flange part, 42d ... Mounting screw, 42e ... Groove, 5 ... High frequency circuit board, 6 ... Power supply circuit board, 7 ... AC
Cord, 8: Shield case, 9: Wall mounting plate

Continuation of front page    F term (reference) 4E360 AB02 AB14 BA08 BB02 CA02                       EA27 ED02 ED27 EE02 FA02                       GA34 GA47 GB97 GC08                 5E321 AA03 AA14 BB23 CC12 CC22                       GG05 GH07                 5E348 AA02 AA07 AA16 AA32 CC06                       CC08 CC09 EE29 EF04 EF38                       FF03

Claims (1)

Claims 1. An electronic equipment case for housing a high-frequency circuit board and another circuit board, wherein the electronic equipment case is formed of an electrically conductive material and has a front opening. It consists of a box-shaped case body and a cover that covers the opening of the case body, and corresponds to the external shape of the high-frequency circuit board.
An inner surface of the case body and an open end of a bottom surface of the frame body are fitted to each other, and an inner surface of the cover is formed on the inner surface of the cover; Side and
A case for an electronic device, wherein a concave groove is provided at a position on the inner surface side of the case body and the cover opposite to the opening end of the frame so that the opening end of the upper surface of the frame is fitted.