JPH11135974A - Electronic equipment housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the no. of components to improve the assembling work efficiency and reduce the manufacturing cost by casting Al to form an integrated partition surrounding circuit regions on a printed wiring board in a frame and mounting the wiring board on the partition. SOLUTION: A printed wiring board 3 has circuits 4a-4f and through-holes communicating with screw holes of a partition 5 to fix the board 3 to the partition 5 by screws 6 in the through-holes. Only mounting the wiring board 3 on the partition 5 of a lower housing 2 causes gaps between the circuits 4a-4f on the wiring board 3 to be shielded. The increase of the contact area of the wiring board 3 with the partition 5 enhances the shield effect. The partition 5 is integrated with the lower housing 2 by the Al diecasting to reduce the no. of components, work man-hour and product cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for electronic equipment used for a mobile communication base station or the like.

[0002]

2. Description of the Related Art A printed wiring board used in a mobile communication base station has a large number of circuit parts such as high-frequency circuits formed therein. A structure that shields each time is required.

As a shield structure for shielding the area of each circuit portion of a printed wiring board, for example, a frame shield structure disclosed in Japanese Patent Application Laid-Open No. 60-52098 has been proposed.

The frame / shield assembly is previously joined to a rectangular frame and a pair of opposing sides on the front side of the frame, and is substantially orthogonal to the sides so as to partition the inside of the frame into a plurality of sections. And a plurality of shield plates, which are inserted from the back side of the frame-shaped frame, are arranged in the center of the frame-shaped frame substantially in parallel with the pair of side portions, and further define each portion partitioned by the shield plate. And a separate shield plate to be divided.

[0005] By adopting such a configuration, the printed circuit board is soldered after a shield plate formed so as to surround the circuit area of each circuit section is soldered after being attached to the printed circuit board. The plate and the frame / shield assembly can be manufactured in separate processes, and electrical troubles due to soldering can be reduced. Also,
This has the effect of reducing the number of parts, reducing material costs and improving strength.

[0006]

However, in the above-mentioned frame shield structure, not only must the frame shield structure itself be manufactured, but also the electric and mechanical structures on the front surface or the front and back surfaces of the printed wiring board. Therefore, it takes a lot of man-hours to manufacture and assemble parts, resulting in poor workability and high manufacturing cost.

In view of the above circumstances, it is an object of the present invention to provide a housing for an electronic device capable of reducing the number of parts, improving the workability of assembling work, and reducing the manufacturing cost.

[0008]

According to the present invention, there is provided an electronic apparatus in which a printed wiring board is disposed in an internal space formed by combining an upper housing and a lower housing. In the housing, inside one or both of the upper housing and the lower housing, a partition part surrounding an area for each circuit part of the printed wiring board is integrally formed by aluminum die casting, and the partition part is formed on the partition part. By mounting the printed wiring board, shielding between the respective circuit parts of the printed wiring board can be performed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention.
1 is an exploded perspective view of a housing for an electronic device, FIG. 2 is an exploded perspective view showing an attached state of a printed wiring board, and FIG. 3 is an enlarged view showing an assembled state. It is sectional drawing.

In FIG. 1, reference numeral 1 denotes an upper housing, and a plurality of fastening projections 1a are integrally formed by aluminum die casting. The protrusion 1a has a through hole 1b.
Reference numeral 2 denotes a lower housing, which includes a plurality of fastening projections 2a and a partition 5
Are integrally formed by aluminum die casting. A screw hole 2b communicating with the through hole 1b is formed in the protrusion 2a. The partition part 5 has a plurality of screw holes 5a formed at predetermined positions.

The upper housing 1 and the lower housing 2 are provided with through holes 1
b and is integrally fastened by a screw 9 screwed into the screw hole 2b. The outer surfaces of the upper housing 1 and the lower housing 2 may be subjected to a coating treatment in order to impart corrosion resistance.

Reference numeral 3 denotes a printed wiring board, and a required circuit portion 4
a, 4b, 4c, 4d, 4e, and 4f are formed.
The printed wiring board 3 is formed with a through hole 3a communicating with the screw hole 5a formed in the partition portion 5, and is fixed to the partition plate 5 by a screw 6 that passes through the through hole 3a and is screwed into the screw hole 5a. Is done. The fixed printed wiring board 3
If there is a possibility that the circuit pattern of the above and the partition section 5 may be short-circuited, the notch 7 may be formed in the partition section 5.

With such a configuration, the circuit portions 4a, 4b, 4c, 4d, 4d, 4c, and 4d of the printed wiring board 3 are simply mounted on the partition 5 of the lower housing 2.
e, shielding between 4f can be performed. Further, the contact area between the printed wiring board 3 and the partition part 5 can be increased to enhance the shielding effect.

By integrally forming the lower housing 2 and the partitioning part 5 by aluminum die casting, a shield case or the like formed separately is not required, and the number of parts and the number of working steps can be reduced. Thus, the cost of the product can be reduced.

FIG. 4 shows a second embodiment of the present invention and is an exploded perspective view of a housing for an electronic device. In the figure, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals. Reference numeral 8 denotes a partition portion, which is formed integrally with the upper housing 1.

With this configuration, the printed wiring board 3 is mounted on the lower housing 2 and the upper housing 1 is fixed, so that both surfaces of the printed wiring board 3 can be shielded. Therefore, even if different circuit portions are formed on both sides of the printed wiring board 3, each can be easily shielded.

[0017]

As described above, according to the present invention, each circuit portion of the printed wiring board is provided inside one or both of the upper housing and the lower housing constituting the housing for electronic equipment. The partition surrounding the area is molded integrally with aluminum die casting, and a printed wiring board is attached to the partition, eliminating the need for a separate shield case, reducing the number of parts and man-hours required. And the cost of the product can be reduced.
The shielding effect can be enhanced by increasing the contact area between the printed wiring board and the partition. Even if different circuit portions are formed on both sides of the printed wiring board, each can be easily shielded.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an electronic device housing.

FIG. 2 is an exploded perspective view showing an attached state of a printed wiring board.

FIG. 3 is an enlarged cross-sectional view illustrating a state where the electronic device housing is assembled.

FIG. 4 is an exploded perspective view showing another embodiment of an electronic device housing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper case, 2 ... Lower case, 3 ... Printed wiring board, 4
a to 4f: circuit portion, 5: partition portion.

Continuation of front page (72) Inventor Kenichi Sakaguchi 180 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Pref.

Claims (1)

[Claims] An electronic device housing in which a printed wiring board is arranged in an internal space formed by combining an upper housing and a lower housing, wherein one of the upper housing and the lower housing or A partition for surrounding an area for each circuit portion of the printed wiring board is formed integrally with both sides by aluminum die casting, and a printed wiring board is attached to the partition. body.