JPH0223038Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a line printer used in a computer.

Conventionally, as shown in FIG. 1, the shielding structure of this type of line printer has obtained a shielding function by using conductive rubber packing with an aluminum frame and attaching it to the housing with screws. Therefore, since it takes time to tighten screws during installation and also requires an aluminum frame, the cost of conductive rubber packing with an aluminum frame is higher for the aluminum frame and for the assembly of the aluminum frame and conductive rubber. There was a drawback in terms of cost.

This invention has an external shape that is compatible with the soundproofing Reston sponge used in conventional line printers, uses conductive rubber (for example, polymer) as the material, eliminates the need for screws during assembly, and uses aluminum as a component. An object of the present invention is to provide a device having an electromagnetic shielding function by attaching a shield rubber packing having a soundproofing function to a casing, which can be configured with only a single component without the need for a frame.

Conductive rubber or polymer is molded hollow to maintain physical compatibility with soundproofing Reston sponge, and by limiting the mounting surface to one surface, conductivity is achieved on the sides. In other words, by deforming the conductive rubber when the frame body and covers come into contact, the conductive rubber makes an electrical connection on the side of the conductive rubber in the covers, and then connects the tip of the conductive rubber with the frame body. electrical connections are made,
As a result, the housing has an electrical connection throughout,
Electromagnetic shielding is provided. Furthermore, since it is physically compatible with the Reston sponge for soundproofing and is hollow so that it can be easily deformed, it can provide the same soundproofing effect as the Reston sponge.

The electrical connection between the frame body and the covers is made using conductive rubber, taking advantage of the elasticity of the rubber, and it also provides a soundproofing effect comparable to that of the conventionally used Reston sponge.

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 2a, the first embodiment of the present invention includes a rubber packing 5 molded from conductive rubber or polymer, a line printer body frame 6,
It is composed of an adhesive 9 used when assembling the front cover 7, hood 8, rear cover 10, and rubber packing 5.

The rubber packing 5 is molded from conductive rubber polymer, and is designed to be hollow so that it deforms in the same way as a Reston sponge when the cover is closed. In addition, the external dimensions were designed to be completely compatible with Reston sponge, which has been conventionally used as soundproof packing.

Front cover 7, hood 8, rear cover 10
As shown in detail at part A in FIG. 2a, the mounting surface of the rubber packing 5 is masked from painting.
As a result, by using bonded steel plate as the material for the front cover 7, hood 8, and rear cover 10, when the front cover 7 is closed, the rubber packing 1 deforms as shown by the dotted line in the details of part B, so the front cover 7 and the rubber packing 5 are 11, and 11'
Electrical connection is obtained at 12 points between the rubber packing 5 and the main body frame 6.

Electrical connections are similarly established between the hood 8 and the main body frame 6, and between the rear cover 10 and the main body frame 6.

In this way, all covers and frames are
Since a good electrical connection is obtained, the housing becomes a shield box that provides electromagnetic shielding.

Referring to FIG. 3, a second embodiment of the present invention shows a case where a rubber packing 5 is attached to the main body frame side. If the shape of the groove for attaching the rubber packing 1 can be easily provided on the main body frame side, it can be realized by the form shown in FIG. The operation and effect are exactly the same as in the case of FIG. 2a.

As explained above, the present invention has the effect of converting the soundproof case into a shield case by giving the conductive rubber packing a shape compatible with the soundproof rubber packing and attaching it to the case.

[Brief explanation of the drawing]

Figures 1a, b, and c are perspective views showing a conventional embodiment, Figures 2a, b, and c are perspective views showing an embodiment of the present invention, and Figure 3 is a perspective view showing a second embodiment of the present invention. FIG. 1... Conductive rubber packing with aluminum frame, 2... Mounting screw, 1'... Conductive rubber packing part of 1, 1''... Aluminum frame part of 1, 3
... Front door according to the conventional embodiment, 4 ... Main body frame according to the conventional embodiment, 5 ... Conductive rubber packing, 6 ... Main body frame according to the present embodiment,
6'... Body frame of the second embodiment, 7... Front cover of the present embodiment, 8... Hood of the present embodiment, 7'... Front cover of the second embodiment, 9
... Adhesive, 10 ... Rear cover of this example, 1
1... Electrical contact point between the front cover and conductive rubber packing, 11'... Electrical contact point on the opposite side to 11, 12... Electrical contact point between 5 and 6.

Claims (1)

[Scope of utility model registration request] In order to shield electromagnetic waves, a hollow convex shape is created using conductive rubber, and grooves are created on three sides of the frame or door side to which this is attached using the door or frame material, and the door is mounted within this surface. Glue is applied to the surface that is subject to stress when the door is closed, and the conductive rubber deforms when the door is closed, causing the conductive rubber to come into contact with the remaining two of the three groove surfaces and also contact the other surface, causing the door to close. A shield packing structure for a housing that is characterized by an electrical connection between the door and frame via conductive rubber when closed.