JPH01308096A - Housing for electronic device - Google Patents

Abstract

PURPOSE:To improve a shielding effect between circuits of a printed board and to improve assembling operability by holding the board at a predetermined position by a cover to be superposed and the opposing part of a case, and simultaneously holding a flexible shielding material, a flexible conductive piece, a connector, a coaxial cable, etc., at predetermined positions. CONSTITUTION:A case 10 is partitioned by a partition wall loa, and a flexible shielding material 20c is pressed in contact with the wall 10a thereby to seal between two chambers. A printed board 30 is so set as to be substantially in the same plane as that of the upper end face of the wall 10a when it is associated in the case 10, the connection to a printed board 40 is secured by a connector 30a, and a clamper 30c, and conducted by a grounded coaxial cable 30b. Further, through holes are formed at the four corners of the boards 30, 40, and elastic conductive pieces 30d are inserted. The superposed faces of the case 10 and the cover 20 are sealed by a flexible sealing material 20c, and the wiring protrusion 30e of the board 30 is interposed to be held between the wall 10a of the case 10 and the material 20c.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a housing for RE equipment such as communication equipment that houses electronic circuit components, printed circuit boards, etc. ? l! The present invention relates to a casing for an electrical device that improves the shielding effect between circuits of printed circuit boards housed in several chambers and improves assembly workability.

[Conventional technology]

FIG. 14 is an exploded perspective view showing a conventional carcass of this type of electrical equipment, in which the interior is divided into a plurality of chambers A,
A case partitioned into B, 1b is a wiring notch step formed at a predetermined position of the partition wall la, le is a wiring notch groove also formed at a predetermined position of the partition wall 1a, and 1r is the same partition as above. A fixing screw 5Tr provided approximately in the middle of the wall 1a and fixing the cover 2, which will be described later, to the case l:
Screw holes 1 (1 are formed at the four corners of each of the chambers B and B in the case 1, and are used to screw in the fixing screws 7 for fixing the printed circuit boards 3 and 4 to the case 1, which will be described later). This is a multi-p pedestal with screw holes Ig for insertion.

Reference numeral 2 denotes a cover that closes the upper opening of the case l, and the inner surface of the cover 2 has a partition plate 2a that coincides with the partition wall 1a of the case l when the cover 2 is fitted into the upper opening of the case l. is formed as shown in the bottom perspective view of the 15th piece. Further, as shown in the enlarged sectional view of the 16th case, a groove 2b extending in the longitudinal direction is formed on the end surface of the peripheral edge of the partition rib 2a and the upper cover 2, and an elastic groove 2b is formed in the groove 2b. A flexible shield material 2c having a structure is housed therein. This flexible shield material 2C is provided to provide a shield T between chambers A and 8 of the case 10 when the opening of the case 1 is closed with the cover 2.

4a and 4b are the side connectors provided on the above printed circuit board 4; 3b are the side connectors 4;
bG+: Coaxed coaxial couple, 3e is the wiring connected to the underground receiver side connector 4a, 8 is a shield fitting attached to this coaxial couple 3b by soldering, etc., and this shield fitting 8 is flexible. The above-mentioned structure 1. has shielding material 2C. Printed circuit board 3.4 inserted into IJ wall 1a
It is designed to provide a shield between the two.

In the case of a conventional electrical equipment made of MIt as described above, when this is used as a casing of a communication device, the sections A and H of the case 1 separated by the partition wall 1a are
It is important to provide an air shield between the printed circuit boards 3 and 4, which are housed in separate circuit boards and have electronic circuit components mounted thereon.In particular, it is difficult to shield the air connections between the printed boards 3 and 4, as described above. Wiring notch 1b'f of partition wall la
:', the opening area of the wiring notch 1θ is made as small as possible, and the shield fitting 8 attached to the coaxial couple 3b is inserted into the partition wall 1a having the flexible shield material 2c.

[Problem to be solved by the invention]

As described above, the conventional electrical equipment housing is housed in the chambers 1 and 2 of the case 1 separated by the partition wall 1a, and the electrical shielding means between the printed circuit boards 3 and 4 on which electronic circuit components are mounted is very important. It's a hassle.

The shielding effect was not sufficient, the number of parts such as fixing screws for assembling the tower body of the electrical equipment was large, and the assembly workability was also extremely poor.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a II electrical equipment casing that improves the shielding effect between the circuits on the printed circuit board and the ease of assembly.

[Means to solve the problem]

The casing of the electrical equipment according to the present invention accommodates printed circuit boards in each of the rooms of the number of keys formed by the partition wall, and has 7S.
: When the opening of the case is closed by the cover, the printed circuit board is held in a predetermined position by the abutting portion of the cover and the case that overlap each other, and a flexible shield material provided on the overlapping surface of the cover and the case; The flexible conductive piece, connector, connector 3, coaxial couple, etc. extended to the printed circuit board are also held in a predetermined position at the same time.

(Function) According to the third aspect of the present invention, when the opening of the case is closed with the cover, the abutting portions of the case and the cover overlap each other to hold each internal member in a predetermined position without using fixing screws. [Embodiment] An embodiment of the present invention will be described below based on the drawings.
FIG. 1 is an exploded perspective view of a housing of a device according to an embodiment of the present invention, where lO is a case whose interior is partitioned into a rectangular chamber A%B by a partition wall 10a, and 10b is a case in which the interior is partitioned into a rectangular room A%B. Shape F at a predetermined position on the partition wall 1 above! iJ is formed to have the same depth as the thickness of the printed circuit board, which will be described later, and is coplanar with this printed circuit board (end) and the partition wall 10a. As shown in the diagram of FIG.
, 40 are placed on a plurality of pedestals of different heights.

10f is a fixing screw ω provided approximately in the middle of the partition wall 10a for fixing the cover to the case 10, which will be described later.
This is a screw hole for screwing in.

21] is a cover that closes the upper opening of the case 10, and on the inner surface of this cover, when it is fitted to the upper opening of the case 10, the partition wall 10 of the case 10 is written.
A partition rear 20a corresponding to the section a is formed as shown in the rear perspective view of FIG. 2 and the cross section of FIG. 8. ! ! In addition, the end faces of the peripheral edges of the partition pool and the cover are shown in FIGS. 2 to 6 as well.

A groove opening extending in the longitudinal direction is formed, and this groove 2
01) contains an elastic flexible shield material 200. As shown in FIGS. 8 and 4, when the case 10 is closed by applying the open loco cover, this i'' flexible shield material +c connects between the chambers A and B of the case IO, that is, between the printed circuit boards and between the 40. It is provided for the purpose of shielding. 20d is the partition with the above cover 2)
As shown in the top view of FIGS. 4 and 6, a cutout groove (9) for communicating the coaxial cable 30b is provided at a predetermined position of a, and a cutout groove f is provided at a predetermined position as shown in FIG. 2. The printed circuit boards 30 and 40 are integrally provided on both ends of the inner surface of the cover, and when the opening of the case 1O is closed with the cover nozzle, the printed circuit boards 30 and 40 are inserted into the case 10, as shown in the cross-sectional view of FIG. The pedestal 10a is a plurality of holding pieces for holding the base 10a and Qi in a predetermined position.

30 is the soil surface or the above partition wall! f) The first printed circuit board, JQa, is installed almost parallel to the upper edge of the partition wall 10a, and the wiring protrusion Jθ protrudes from the cutout step 101) of the partition wall 10a into the adjacent chamber B. The coaxial cable is attached to the edge of the printed circuit board 40 and is connected to other units on the printed circuit board (materials) of 30c
During this time, connect the shaft coupler JJb to the first printed circuit board (support).
Clampers and clampers for fixing to the soil and grounding are inserted into a plurality of through holes drilled in the edges of both the printed circuit boards 30.40, and are in contact with the pedestal 100.1CM and are electrically connected thereto. The elastic conductive piece 40a is a connector connected to the connector a provided on the wiring protrusion (9)e between the printed circuit boards.

Although the casing of the electrical device of the present invention is configured as described above, the main parts will be supplementally explained.

First, in FIG. 1, at least the surface of the case 1O and the cover plate is made of good conductor, and there is no electrical connection between the printed circuit boards and the printed circuit board 40 except for the output part. TI that wants to completely shut out interference
This is a board with an L air circuit. Also.

The case 10 is divided into two chambers by a partition wall 10a, and a groove 20 provided in a partition 1201L with a cover
1) The flexible shield material 200 incorporated in the partition wall 10
By being pressed against a, the space between the two chambers is reliably shielded. Furthermore, when the printed circuit board 3D is assembled into the case 10, it is set to be approximately flush with the upper end surface of the partition wall 1tla, and furthermore, js! A is fixed by a clamper (support) C at the end of the upper surface of the printed circuit board (9) and a connector 30a provided on the wiring protruding part 30a that protrudes to the minimum necessary extent between the printed circuit boards, and is grounded. This is done using a coaxial table (material) b.

Wiring protrusion 30e of printed circuit board 3 for such connection
In order to insert the coaxial couple, the partition wall 10a of the case 10 has a notch step 10b, and in order to communicate the coaxial couple, there is a notch groove 2 in the partition wall of the cover.
0d is provided.

Roughly speaking, each of the printed circuit boards 11.40 has the following:
Through holes are formed at the four corners, and one elastic conductive piece is inserted as shown in FIGS. 8 and 4. In general, the overlapping surface between the case lO and the cover is covered with a flexible sealing material 20.
securely shielded by c, and the printed circuit board (support)
Since the wiring protruding portion 200 is held between the partition wall 10a of the case 10 and the flexible shielding material 200, the ground pattern on the pressure contact surface of this printed circuit board (material) is grounded by the elastic pressure of the flexible shielding material on both sides ( Both the upper and lower surfaces of the support 40 are connected to the ground circuit of the cover 20:8 and the case 10. In this state, -10,000 printed circuit board connector 4
The elastic conductive strips connected to the other printed circuit board (support) by 0a and incorporated in both printed circuit boards 30 and 40 are connected to the base 10o and IQi of the case 10 by the holding pieces 21)e and 20f of the cover. The flint substrates 11 and 40 are fixed together and grounded to the case IO.

In FIG. 4, the clamper 30c is soldered between the printed circuit boards, and is also fixed to the outer shield of the coaxial couple 30b by soldering.
It strengthens the ground.

Next, other embodiments of the invention will be described.

FIG. 7 shows a groove 2ob provided in the partition plate Δ of the cover part formed along the circular arcs of the two notch grooves, and the above-mentioned embodiment (
Groove 2 along the arc of notch groove 20+1 as shown in Figure 6).
The same effect as that without forming 0b can be obtained, but the fifth
The groove 20b of the embodiment shown in the figure is inserted into the groove 20b.
ili] Since the flexible sealing material Δ does not need to be pressed against the edge of the sword bar 10 and spread into the arc-shaped groove 2)b, the flexible shielding material 200 is less likely to be damaged, and the cover 2)? The mold structure, which requires 770 molding operations, becomes simpler.

? Figure 8 shows the printed circuit board housed in the case 1O as a large single unit, and the 8 chambers in the case 1O, B,
The plurality of notched steps 101 of the O partition wall 10a, which divides the circuit into 0, are kept to a minimum at both ends of the partition wall 1 (storm), and this part is used to connect each room and print. After fixing the board blade, install the partition wall 1 inside 30f.
The coaxial couple 3b and clamper C are almost the same as those in the embodiment shown in Figure @1, but the printed circuit board (9) Compared to the case where the board is divided into parts, the need for clampers is reduced.Furthermore, only four elastic conductive strips are required as shown in the figure, making it extremely simple. In addition, the foil-like conductive piece 30 is provided so as to cover part or all of the slit depth, and is connected to the ground turn of the printed circuit board blade by soldering or the like to electrically connect the slit 30f. Not only connection, but also complete grounding to the case 10, which would not be sufficient just by inserting the partition wall 10a into the slit 3of, becomes possible.

Roughly speaking, the foil-like conductive piece 30g is sandwiched between the case lO and the partition walls 10a and 2Oa of the cover field, and is pressed together through a flexible shielding material. If you use a pull printed circuit board, etc., there is no need to provide a notch step 20a on the partition wall 1.The ninth factor is that the printed circuit board (9) should be 8 minutes 11Jcm thick, oil-proof, and the coaxial cable This shows the case where ib is omitted and the connection is made directly using the coaxial connector (1)h for printed circuit boards.

Furthermore, although FIGS. 10 and 11 show the deformation of the elastic conductive single blade d, it is inserted into the through hole of the printed circuit board to ensure the ground connection to the case IO is exactly the same as in the above embodiment. The O-th x21d, which is a sword bar 2
This shows the case where the groove 201) of the partition M is omitted and a guide pin decoration is provided instead, and the flexible shield material 20C
By arranging the flexible shield material 20 in a wavy manner,
This is to simplify the work of fixing 0. Also, Figure 13.

The flexible shielding material 20c arranged in a wavy manner is pressed so as to straddle the slit V of the printed circuit board blade, so that the slit jf is covered by the foil-like conductive piece Jg (
(Fig. 8). Although the above embodiment 5 describes the case where the coaxial couple 30b is used, the present invention is not limited to this, and for example, the coaxial couple 30b is used. A shielded wire may also be used.

! ! In addition, the wiring protrusion island of the printed circuit board blade shown in No. 11/'E and No. 9 may be formed using a 7 lexiple board. In this case, it is not necessary to form the cutout stepped portion 1tl of the case 10. .

In general, the top surface of the pedestal 1 of the case 1, the top surface of the ioa, that is, the contact surface of the printed circuit board, is not limited to a flat surface, but may be formed into a surface that matches the shape of the elastic conductive strip superimposed thereon. This will ensure more reliable electrical contact and
Is this elastic conductive piece part or all a rubber-covered connector? It is also possible to connect it to another printed circuit board with a two-layer structure attached thereto, and it is also possible to configure it so as to utilize the vibration-proofing effect of the #1 elastic electric strip (9) d.

〔Effect of the invention〕

As described above, according to the present invention, when the opening of the case in which the printed circuit board is housed in each of the plurality of partition walls is closed with a cover, the abutting portions of the cover and the case that overlap each other cause the printed circuit board to be printed. While holding the board in a predetermined position, electronic circuit components such as the flexible shield material ε provided on the overlapping surface of the cover and case, the flexible conductive piece inserted into the printed circuit board, connectors, and coaxial cables are also held in place at the same time. Since it is held in position, it is possible to provide a housing for an electrical device at a low cost, which has an improved shielding effect between the circuits of the printed circuit board and improved assembly workability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the housing of an electrical device according to an embodiment of the present invention, Fig. 2 is a perspective view of the rear side of the sword bar, and Fig. 8 is a perspective view of the wiring protrusion of the printed circuit board in the assembled box. Cross-sectional view, Figure 4 is a WIT view of the notch groove part of the cover in the box body, Figure 5 is an enlarged perspective view showing the notch groove of the cover, and Figure 6 is an enlarged cross section of the notch groove of the cover overlapped with the case. Figures 7 to 18 show other embodiments of the present invention. Figure 7 is an enlarged perspective view showing the cutout groove of the cover, and Figure 8
Figure 9 is an exploded perspective view of the case and printed circuit board, Figure 9 is a perspective view of the printed circuit board, Figures 101 and 11 are perspective views of the printed circuit board with the flexible conductive piece inserted, and Figures 12 and 18 are A perspective view of the cover with the flexible shielding material attached and a top view of the printed circuit board.
is a chamber, 10 is a case, 20 is force/<-1 (equity), cut is a printed circuit board, and ω is a flexible shield material. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] It consists of a case that houses printed circuit boards with electronic circuit components mounted in multiple chambers formed by partition walls, and a cover that closes the opening of the case.The cover and the cover overlap each other when the opening of the case is closed. The printed circuit board is held in a predetermined position by the butt portion of the case, and the flexible shield material provided on the overlapping surface of the cover and the case and the electronic circuit components near the printed circuit board are simultaneously held in the predetermined position. A housing for electrical equipment that consists of a case and a cover to hold it.