JP2005026321A - Cabinet structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cabinet structure which is capable of ensuring electric conduction, reducing screwing parts and assembling processes in number, and reducing components in cost. <P>SOLUTION: A shielding cover 20 is screwed onto the peripheral edge of a hollow cabinet 10 having an opening A for sealing through the intermediary of spring contacts to obtain the cabinet structure. The cabinet structure is equipped with the cabinet 10 which has a plurality of holes 14 located at the one end of the opening A and a plurality of projections 12 located at the other end protruding toward the opening A and the shielding cover 20 which is formed into a plate shape with a cranked part to stop up the opening A of the cabinet 10, equipped with a plurality of tips 24 that are located at its one end and bent in an opposite direction to a sealing side to be fitted into the holes 14, and has a cranked part that is located at its other end extending from the opening A to the projections 12 and provided with insertion holes 22 where the projections 12 are fitted. The tips 24 are fitted into the holes 14 and rotated bearing against them, and the projections 12 are fitted into the insertion holes 22 located at the other end bearing against them, so that spring contact members located at the bearing ends can be dispensed with, and screwing parts can be reduced in number. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a housing (unnecessary radiation shielding) structure. More specifically, a predetermined circuit is built in a hollow housing having an opening surface, and a shield contact member is interposed on the periphery of the opening surface with a spring contact member interposed therebetween. The present invention relates to a housing structure that is sealed with screws.
[0002]
[Prior art]
[Patent Document 1]
Japanese Utility Model Publication No. 6-21294
For example, in an electronic circuit built in an electronic device, electromagnetic interference is caused by unnecessary radiated electromagnetic waves that adversely affect the external electromagnetic environment because a large current flows transiently from elements such as CMOS-FETs and electromagnetic waves are radiated. is there. Therefore, conventionally, a predetermined circuit that emits electromagnetic waves is incorporated in a hollow casing having an opening surface, and a shield cover having a spring contact is screwed around the periphery of the opening surface to seal the electromagnetic waves. An unnecessary radiation shielding structure (see, for example, Patent Document 1) is well known. FIG. 5 is a view showing a conventional unnecessary radiation shielding structure for shielding such electromagnetic waves. 6 is a cross-sectional view showing a cross section taken along line BB shown in FIG.
[0004]
As shown in FIG. 5, the conventional unnecessary radiation shielding (housing) structure includes a front panel 32, an upper cover 34, a lower cover 36, a side frame 35, and a rear panel 38. (Not shown) and a housing 30 for shielding, and the covers 34 and 36 are press-molded with an aluminum plate which is a conductive plate, and the outer surface thereof is coated with an insulating paint.
Here, the front end portions of the covers 34 and 36 are shielded by attaching a front panel 32 which is simply a flat plate. Further, the side edges of the covers 34 and 36 are shielded by providing side frames 35. The rear ends of the covers 34 and 36 are shielded by attaching and attaching a rear panel 38 made of an aluminum plate similar to the cover by screws 31.
[0005]
At this time, as shown in FIG. 6, the rear end portion of the cover 34 forms a flat portion 34 a that is bent at a substantially right angle on the inside, and the tip thereof is a flange portion that is bent at a substantially right angle in the front direction. 34b is formed. Further, the flat portion 34a is formed with a screw hole 34c into which the screw 31 is inserted. And the edge part of the rear panel 38 is bent about 45 degree | times outside, and also the front-end | tip is bent about 45 degree | times inside, and the inclined part 38a and the flat part 38b are formed. A screw hole 38c into which the screw 31 is screwed is formed in the flat portion 38b.
[0006]
Accordingly, the electrical continuity (contact) between the covers 34 and 36 and the rear panel 38 is performed at the fastening portion of the screw 31 shown in FIG. 6, and is also performed at the front end portion of the collar portion 34b and the inclined portion 38a. It has. Although the former contact is a point contact, since the latter contact is a line contact along the inclined portion 38a, electrical conduction is improved and the shielding effect is improved.
As described above, in the conventional unnecessary radiation shielding structure, in addition to a structure in which the electrical continuity between the covers 34 and 36 and the rear panel 38 is brought into point contact by fastening the screw 31, the tip end portion of the collar portion 34b is inclined to the inclined portion 38a. By providing a spring contact structure that is line-contacted along the line, electrical conduction is improved and the shielding effect is improved.
[0007]
[Problems to be solved by the invention]
However, in the conventional unwanted radiation shielding structure, a large number of fastening screws 31 are used to electrically connect the covers 34 and 36 and the rear panel 38 shown in FIG. As the assembly man-hours in the manufacturing process for fastening are increased, there is a problem that the cost of the parts also increases.
The present invention solves such a problem, secures electrical continuity, reduces the number of fastening points by screws, reduces the number of assembly steps, reduces the cost of parts, and has a casing structure with an unnecessary radiation shielding effect. The purpose is to provide.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a housing structure in which a predetermined circuit is built in a hollow housing having an opening surface and the opening surface is sealed with a shield cover, and is provided at one end of the opening surface. A housing having an opening hole and having a protrusion projecting in the direction of the opening surface on the other opposite side, and a plate-like shape that seals the opening surface of the housing, and a plurality of protrusions projecting to one end side and sealing side And a shield cover provided with an insertion hole for fitting into the projection on the other end side, and the other end side of the shield cover is fitted into the opening hole of the housing. By inserting the insertion hole on the side into the protrusion, the sealed state is maintained.
[0009]
Here, the shield cover extends in a crank shape from the opening surface to the protrusion, and the distal end portion of the shield cover is fitted so as to be in a rotational pressure contact within the opening hole, and the insertion hole is rotationally pressed into the protrusion. It is preferable that the sealing state is maintained by fitting the heads. Moreover, it is preferable that a protrusion is provided with the slope which protrudes gradually on the rotation track | orbit inner surface of the insertion hole which arises by rotation, and the linear part which is connected to this slope and approaches the track again. Moreover, it is preferable that a shield cover bends a front-end | tip part at an obtuse angle with respect to the plate-shaped surface which seals an opening surface. Moreover, it is preferable that a shield cover has a spring contact member on both sides of the surface from a front-end | tip part to an insertion hole.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a housing structure according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing an embodiment of a housing structure according to the present invention. FIG. 2 is a perspective view showing a sealing surface of the shield cover 20 shown in FIG. 3 is a diagram showing an operation of sealing the housing 10 shown in FIG. 1. FIG. 3 (a) shows a state before sealing, and FIG. 3 (b) shows a state after sealing. Each is shown. FIG. 4 is a diagram showing an engaged state at the protrusion 12 shown in FIG.
[0011]
As shown in FIG. 1, the embodiment of the housing structure according to the present invention has an opening surface A, is formed in a hollow shape, and is provided with a plurality of opening holes 14 on one end side of the opening surface A and is opposed to the other end side. The housing 10 having a plurality of protrusions 12 projecting toward the opening surface A on the side surface thereof, and the opening surface A of the housing 10 are sealed with a spring contact member 25 (see FIG. 2) around the periphery. It is formed in a plate shape, provided with a tip portion 24 that protrudes plurally at one end side, bends in the opposite direction to the sealing side and fits into the opening hole 14, and is cranked from the opening surface A to the protrusion 12 on the other end side. And a shield cover 20 having a plurality of insertion holes 22 extending and fitted therein.
[0012]
In the present embodiment having such a configuration, the rotation of inserting the distal end portion 24 of the shield cover 20 into the opening hole 14 of the housing 10 and inserting the insertion hole 22 on the other end side into the protrusion 12 (see FIG. 3). ), The distal end portion 24 is rotationally pressed in the opening hole 14, and the insertion hole 22 at the other end is fitted into the protrusion 12 while being pressed and maintained in a sealed state. 10 is provided so as to eliminate the need for the spring contact members at both ends and reduce the screwing points. Therefore, in the present embodiment, since the shield cover 20 is attached to the casing 10 to maintain an electrically conductive and sealed state, as shown in FIG. When attaching to the body 10, it becomes possible to reduce the screwing location for conduction | electrical_connection significantly (in FIG. 1, 2 upper part).
[0013]
Here, the housing 10 is made of a metal material such as stainless steel (SUS) or aluminum, and has an opening surface A that is formed in a hollow shape in a box shape and opens to a predetermined surface, and is perpendicular to the lower end of the opening surface A. Two opening holes 14 are provided in the opening. Further, the housing 10 is provided with a thin plate-like rib 11 extending in the vertical direction on the top surface at the upper end of the opening surface A, and provided with a pair of protrusions 12 projecting from the rib 11 toward the opening surface A. The ribs 11 are each provided with screw holes 13 for inserting and fastening screws 21 between the pair of protrusions 12 provided.
[0014]
On the other hand, the shield cover 20 is made of the same material as the housing 10 or a metal material such as beryllium (phosphor bronze), and is formed in a plate shape for sealing the opening surface A of the housing 10 as described above. The side end portion 24 and the other end side insertion hole 22 are provided. Here, the shield cover 20 extends so that the other end side facing the front end portion 24 bends at a substantially right angle from the opening surface A of the housing 10 along the side surface of the upper end portion and has elasticity, By bending further from the tip and extending vertically along the rib 11 of the housing 10, it is formed in a crank shape. The shield cover 20 has an insertion hole 22 into which the protrusion 12 is fitted on a side surface extending vertically along the rib 11 and a screw hole 23 opened in accordance with the position of the screw hole 13 of the rib 11. Provided.
[0015]
The shield cover 20 is a spring contact member having elasticity at the periphery so that when the opening surface A is sealed, electromagnetic waves are emitted from the periphery of the opening surface A and do not adversely affect the external electromagnetic environment. 25 (see FIG. 2) is used to obtain electrical continuity and shield it. At this time, as shown in FIG. 2, the spring contact member 25 is attached to the shield cover 20 in advance, and does not need to be provided on all sides of the shield cover 20. 14 is provided at the peripheral edge that omits the distal end portion 24 side and the insertion hole 22 side, which are engaged with each other to obtain electrical conduction. In other words, the spring contact member 25 is provided on each side of the crank shape extending from the distal end portion 24 side to the insertion hole 22 side. Here, the embodiment in which the spring contact member 25 is mounted in advance on the shield cover 20 has been described. However, the present invention is not limited to this. For example, the spring contact member 25 may be mounted in advance on the housing 10 side.
[0016]
In the embodiment of the casing structure according to the present invention formed as described above, when the shield cover 20 is attached to the casing 10 as shown in FIG. The front end 24 is fitted into the opening hole 14 by being almost vertical. Thereafter, the shield cover 20 seals the opening surface A by turning the insertion hole 22 on the other end side so as to fit into the protrusion 12 of the housing 10 with the distal end portion 24 fitted in the opening hole 14 as a fulcrum. To do. At this time, as shown in FIG. 3B, the shield cover 20 rotates so that the tip 24 bent at a predetermined angle is lifted in the opening hole 14, so that the tip end is formed around the opening hole 14. Electrical contact with the housing 10 is obtained by press-contacting 24. Further, when sealing the opening surface A of the housing 10, the shield cover 20 keeps the opening surface A of the housing 10 sealed by inserting the insertion hole 22 provided in the upper portion into the protrusion 12. Is done. This is because, when the distal end portion 24 of the shield cover 20 is rotationally pressed in the opening hole 14, as shown in FIG. 3B, finger pressure is generated in the direction opposite to the direction in which the distal end portion 24 is lifted. Similarly, finger pressure is generated in the opposite direction to the sealing direction away from the housing 10 in the upper portion of the, so that the insertion hole 22 is caught by the protrusion 12 and maintained (fixed) in the sealed state.
[0017]
Here, as shown in FIG. 4, the protrusion 12 has a rotation orbit (shown in FIG. 4) of the insertion hole 22 that rotates in the sealing direction on the other end side by the rotational pressure contact of the distal end portion 24 (see FIG. 3). An inclined surface 12a that gradually protrudes on the inner surface (the hatched portion shown in FIG. 4) and fits into the insertion hole 22 while being pressed into contact with the insertion hole 22; And a linear portion 12b that gradually releases the finger pressure that presses against and maintains the shield cover 20 in a sealed state. As shown in FIG. 4, the protrusion 12 adjusts the finger pressure gradually coming into contact with the insertion hole 22 according to the notch angle of the inclined surface 12 a. Therefore, the insertion hole 22 inserted into the protrusion 12 is gradually pressed downward along the inclined surface 12a, and the finger pressure is reduced toward the straight portion 12b. That is, since the projection 12 strongly presses against the insertion hole 22 between the inclined surface 12a and the straight portion 12b, the shield cover 20 that has rotated to the straight portion 12b beyond the inclined surface 12a cannot be easily removed, and the housing 10 Can be maintained in a sealed state.
[0018]
As a result, the shield cover 20 is attached to the housing 10 in a self-supporting state by the pressing force at both ends of the distal end portion 24 and the insertion hole 22 as shown in FIG. Stable electrical conduction can be ensured between them. After that, as shown in FIG. 1, the shield cover 20 is fixed to the housing 10 by opening the screw 21 by inserting the screws 21 into the screw holes 13 in the upper portion of the housing 10 through the screw holes 23 and tightening the opening surface. A can be reliably sealed.
[0019]
Thus, according to the embodiment of the housing structure according to the present invention, as shown in FIG. 1, the simple structure of the housing 10 and the shield cover 20 enables one-touch attachment that can easily seal the opening surface A. Therefore, the number of fastening points of the screw 21 can be reduced to the minimum, so that the assembling work in the manufacturing process can be simplified, the number of assembling steps can be reduced, and the component cost can be reduced at the same time. Moreover, an unnecessary radiation shielding effect can be provided.
[0020]
As mentioned above, although embodiment of the housing structure by this invention was described in detail, this invention is not limited to embodiment mentioned above, It can change in the range which does not deviate from the summary.
For example, the embodiment of the shield cover in which two insertion holes, two screw holes, and two tip portions are provided as a pair has been described. However, the present invention is not limited to this, and two or more shield covers can be provided in the shield cover. .
[0021]
【The invention's effect】
As described above, according to the housing structure according to the present invention, the simple structure of the housing and the shield cover enables one-touch attachment that can easily seal the opening surface, and the number of screw fastening points can be reduced to a minimum. The assembly work in the manufacturing process is simplified, the number of assembly steps can be reduced, and the component cost can be reduced at the same time.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a housing structure according to the present invention.
2 is a perspective view showing a sealing surface of the shield cover shown in FIG. 1. FIG.
FIG. 3 is a diagram showing an operation of sealing the housing shown in FIG. 1;
FIG. 4 is a diagram showing an engaged state at a protrusion shown in FIG.
FIG. 5 is a diagram showing a conventional unnecessary radiation shielding (housing) structure.
6 is a cross-sectional view showing a cross section taken along line B-B shown in FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Housing | casing 11 Rib 12 Protrusion 12a Slope 12b Straight part 13 Screw hole 14 Open hole 20 Shield cover 21 Screw 22 Insertion hole 23 Screw hole 24 Tip part 25 Spring contact member

Claims (5)

In a housing structure in which a predetermined circuit is built in a hollow housing having an opening surface and the opening surface is sealed with a shield cover,
A housing having an opening hole on one end side of the opening surface and having a projection protruding in the opening surface direction on the other end side facing the opening surface;
Formed in a plate shape that seals the opening surface of the housing, provided with a tip that protrudes at one end and bends in the direction opposite to the sealing side, and has an insertion hole that fits into the protrusion at the other end Shield cover,
The casing structure is maintained in a sealed state by fitting the tip end portion of the shield cover into the opening hole of the casing and inserting the insertion hole on the other end side into the protrusion. The housing structure according to claim 1,
The shield cover extends in a crank shape from the opening surface to the protrusion, and the tip end portion of the shield cover is fitted so as to be rotationally pressed in the opening hole, and the insertion hole is formed in the protrusion. A housing structure that is maintained in a sealed state by being fitted so as to be in press contact with rotation. In the housing structure according to claim 1 or 2,
The protrusion has a slope that gradually protrudes in a rotation orbit surface of the insertion hole generated by the rotation, and a linear portion that is connected to the inclination surface and approaches the rotation orbit of the insertion hole again. Characteristic housing structure. The housing structure according to any one of claims 1 to 3,
The said shield cover is a housing | casing structure characterized by bending the said front-end | tip part at an obtuse angle with respect to the plate-shaped surface which seals the said opening surface. The housing structure according to any one of claims 1 to 4,
The casing structure, wherein the shield cover has spring contact members on both sides of a surface extending from the tip portion to the insertion hole.

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