JPH0541591A - Shielding structure for housing - Google Patents

Abstract

PURPOSE:To enhance close contact of a frame with a door in a housing even if the height of the housing becomes high particularly in a shielding structure for sealing the housing with the door. CONSTITUTION:The shielding structure for a housing comprises a housing 1 made of metal members, a door 7 subjected to conductive treatment on the rear surface thereof and made of a metallic member, a unit 4 having a power source terminal 3, a power source 2 for supplying power to the unit 4, an arbitrary trestle 5 for forming the housing 1, and positive, negative side wirings 5a, 5b wired at the time of supplying the power from the power source 2 to the trestle 6 in such a manner that a positive side is wound in a coil state at the trestle 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure for a housing, and more particularly to a shield structure for bringing a housing and a door into close contact with each other.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4 and FIG. 5, a metallic side plate 40a is similarly formed from a side surface of a single metallic housing 40, and the front and back surfaces are double-sided. Similarly, a metallic door 40b is formed in this as well.

On the back surface 40b 'of the door 40b, as shown in FIG. 5, a contact surface between the frame constituting the housing 40 and the door 40b is subjected to a conductive surface treatment, and a conductive packing 42 is provided between them. Is provided. That is, the conductive surface treatment section and the conductive packing 41 prevent radio wave radiation from the inside of the device, malfunction due to electrostatic discharge from the outside, and element destruction.

The frame side hook insertion rod 43 in FIG. 5 is provided on the opposite side of the shaft 42 when the door 40b is opened and closed, and is used when the door 40b is hooked to the housing 40 at the upper and lower ends thereof. ..

[0005]

However, since the packing 42 has a repulsive force in the conventional structure, as shown in FIG. 6, the door central portion a to which the restraining force between the frame 40c and the door 40b is not applied swells. As a result, the close contact with the frame 40c cannot be maintained, and as a result, the shielding effect is weakened, and the required radio wave radiation regulation cannot be satisfied.

This is particularly the case when the height of the housing 40 is high, and in such a case, it is extremely difficult to bring the door central portion a into close contact with the frame 40c. Therefore, it is an object of the present invention to increase the degree of close contact between the frame of the housing and the door even if the height of the housing increases.

[0007]

The above-described object is to provide a unit 1 having a housing 1 made of a metal body, a door 7 made of a metal body having a conductive treatment portion 9 formed on a back surface 7a, and a power supply terminal 3.
And a power supply device 2 for supplying power to the unit 4, an arbitrary frame 6 that constitutes the housing 1, and a connection for supplying power from the power supply device 2 to the frame 6, and This is achieved by a shield structure of a housing, characterized in that the positive side is provided with a positive side and negative side wirings 5a and 5b wound around the body 6 in a coil shape.

[0008]

That is, in the present invention, of the positive and negative wirings for supplying power to the unit, the positive wiring is wound around the frame of the housing.

As shown in FIG. 2, when power is supplied from the power supply unit to the unit, a magnetic force is generated between the wirings wound around the frame at the time when the power is supplied, and this causes a line of magnetic force. Become.

Therefore, due to this magnetic force, the frame of the housing and the door, both of which are made of metal, can be brought into close contact with each other.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the present invention.
FIG. 3 is a view showing the back surface of the door. 1 to 3, the same reference numerals denote the same objects.

As shown in FIG. 1, a plurality of logic circuit parts 4 and a plurality of power supply devices 2 for supplying power to the logic circuit parts 4 are unitized, respectively, and are multi-staged in a frame 1 having a rack structure. It is installed.

As shown in the figure, the housing 1 of the present invention comprises plate-shaped members 1a and 1b made of iron on the upper and lower surfaces, and support members 1c made of iron which support the members 1a and 1b at their four corners. It is configured. These support members 1c are provided with bearings for opening and closing a door (not shown) of a double door type, and the support member 1 also made of iron is provided at a portion where the doors opened and closed by the double door opening face each other.
Further, a pillar 6 made of iron is also formed in the central portion of the housing 1, and the plate-shaped members 1a and 1b, the support members 1c and 1d, and the pillar 6 form a rack structure of the housing. ..

The power supply device 2 is provided in the logic circuit section 4.
A power supply terminal 3 to which the power supply wirings 5a and 5b are connected in order to supply power from the power supply terminal 3 is provided.
A power supply line 5a on the positive side and a power supply line 5b on the negative side, which connect the power supply device 2 and the power supply device 2, are connected to the power supply device 2 and the logic circuit unit 4, respectively, of which the power supply wire 5a on the positive side is connected. Is wound around the pillar 6 in a coil shape.

On the other hand, a door 7 which is opened and closed with respect to the housing 1 is shown in FIG. 3, and a back surface 7a of the door 7 has a conductive surface treatment (conductive treatment portion) such as nickel plating over the periphery of its edge. 9) and has a shaft 8 that serves as a shaft for opening and closing with the housing 1, and a frame-side hook for hooking the door 7 to the frame 11 of the housing 1 when the door 7 is closed. It has an insertion rod 10.

The conductive surface treatment formed on the door 7 is performed by nickel plating or the like (conductive treatment) on the portion of the frame 11 of the housing 1 that comes into contact with the door 7 when the door 7 is closed. The part 9) is formed.

When the power of the apparatus 1 is turned on with respect to the housing 1 constructed as described above, the frame 11 forms an electromagnet having both upper and lower poles according to the principle of a solenoid as shown in FIG. 9'occurs and frame 11
It is possible to shield the casing 1 and the door 7 without being influenced by the height of the casing 1 by suction-adhering the door 7 facing the casing.

[0019]

As described above, according to the present invention, since there is no repulsive force of the packing, it is possible to realize a shield structure over the entire circumference of the door.

Further, since the door is tightly closed while the apparatus is in operation (power is on) and it is easy to open when the apparatus is stopped, both safety and maintainability are improved. Furthermore, since packing is not required and effective shielding can be performed only with existing parts, cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an operation of the present invention.

FIG. 3 is a diagram showing a back surface of a door.

FIG. 4 is a diagram showing a conventional example.

FIG. 5 is a view showing a back surface of a conventional door.

FIG. 6 is an enlarged view of a conventional example.

[Explanation of symbols]

1 housing, 2 power supply units, 3 power supply terminals, 4 logic circuit units (units),
5a, 5b power supply wiring, 6 pillars (frame), 7
Door, 9 Conductive processing part,

Claims (1)

[Claims] 1. A unit (4) having a housing (1) made of a metal body, a door (7) made of a metal body, a door (7) made of a metal body, having a conductive treatment part (9) formed on a back surface (7a), and a power supply terminal (3). ), A power supply device (2) for supplying power to the unit (4), an arbitrary frame (6) constituting the housing (1), and the power supply device (2) to the unit (4). Wires (5a, 5b) are provided to connect the power supply and the positive side and the negative side are wound around the body (6) in a coil shape.
And a shield structure for the housing.