JPH04260398A - Earth for electronic equipment - Google Patents

Abstract

PURPOSE:To provide an earth for electronic equipment which is high in the degree of freedom in the design of earth pattern and can be highly integrated on a board. CONSTITUTION:This earth for electronic equipment is provided with a boss 6 erected on a cabinet board, substrate 1, fixture 4 for fixing the boss 6 to the substrate 1, earth pattern 2 formed on the lower surface of the substrate 1, shield plate 3, and elastic body 7 composed of a spring connecting the earth pattern on the board 1 to the plate 3. Since the pattern 2 does not require any position and, accordingly, positional accuracy against the plate 3 and the area of the pattern 2 can be reduced, the degree of freedom in the design of the earth pattern can be improved and the degree of integration on the board 1 can be increased. In addition, since the board 1 can be easily removed, this earth for electronic equipment can be improved in workability and productivity.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground for electronic equipment particularly suitable for dot impact printers and the like.

0002

[Prior Art] In recent years, in order to strengthen the grounding of electronic devices, grounding for electronic devices has been done either by directly contacting the grounding pattern of the board with a shield plate by tightening screws, or indirectly by using a lead wire. A method of connecting is adopted.

[0003] Hereinafter, a conventional ground for electronic equipment will be explained. FIG. 3 is a configuration diagram of a conventional ground for electronic equipment.

In FIG. 3, 1 is a board, 2 is a ground pattern placed on the bottom surface of the board 1, 3 is a shield plate placed on the cabinet bottom (not shown), and 4 is a screw for fixing the board. , 5 is the cut-and-raised portion of the shield plate.

The assembly of the conventional electronic equipment ground constructed as described above will be explained below.

The board 1 is placed on the cut-and-raised part 5 of the shield plate arranged at the bottom of the cabinet, and tightened with screws 4. At this time, the ground pattern 2 of the board 1 and the raised cut 5 of the shield plate are directly connected by tightening the screws 4.

[0007]

However, in the above-mentioned conventional configuration, the space of the board is limited and becomes smaller due to the cutting and bending of the shield plate, which poses a problem in that the number of circuit components that can be mounted is limited. In addition, during assembly, it is necessary to accurately determine the position of the ground pattern relative to the cut-and-raised portion of the shield plate, and in order to avoid short-circuits between patterns other than the ground and the cut-and-raised portion of the shield plate, high precision is required in the pattern design. There was a problem in that the degree of freedom was restricted.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a shield plate on a cabinet bottom is connected to a ground pattern on a board through a spring formed so as to be attachable.

[0009]

[Operation] With the above structure, the required area of the ground pattern is reduced, so the number of circuit components that can be mounted increases, and the degree of integration can be increased accordingly. In addition, since the ground pattern is not subject to restrictions on position and position accuracy with respect to the shield plate, the degree of freedom in pattern design is increased, and it is possible to increase the degree of integration of the board and improve productivity.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a ground for electronic equipment according to an embodiment of the present invention, and FIG. 2 is a perspective view of a spring, which is one of the elastic bodies.

In FIGS. 1 and 2, 1 is a board, 2 is a ground pattern placed on the bottom surface of the board 1, 3 is a shield plate placed on the cabinet bottom (not shown),
Reference numeral 4 denotes screws for fixing the board, and since these are the same as in the conventional example, the same numbers are given and explanations are omitted.

6 is a boss extending from the cabinet bottom plate. In FIG. 2, reference numeral 7 denotes a spring, which is one of the elastic bodies, and is formed as a fixed piece by winding only one turn of the tip vertically. Further, the spring 7 may be in the form of a wound band as long as it is an elastic body and conductive.

The assembly of the electronic equipment ground of this embodiment constructed as described above will be explained below.

First, the vertically wound portion at the tip of the spring 7 is inserted into the hole in the board. As a result, spring 7
is fixed to the substrate 1.

Next, the board 1 is attached to the boss 6 on the cabinet board.
Tighten the screws 4 to fix the board 1 on the shield plate 3.

Thereafter, the spring 7 is sandwiched between the substrate 1 and the shield plate 3, and the earth pattern 2 and the shield plate 3 are connected.

As described above, according to this embodiment, the area of the ground pattern required for connecting the ground pattern 2 on the board 1 and the shield plate 3 is smaller than that in the conventional case, so that high integration of the board can be achieved. becomes easier.

Furthermore, in this embodiment, since the grounding pattern 2 is grounded by the spring 7, the position and positional accuracy of the grounding pattern 2 with respect to the shield plate 3 are not required. It is possible to further simplify the process.

Furthermore, when removing the board, the grounding part can be removed simply by removing the spring 7, which is easier than before, and it is possible to realize an excellent ground for electronic equipment that improves workability and productivity.

[0020]

According to the present invention, the area of the ground pattern required for connection between the ground pattern and the shield plate is smaller than that of the conventional method, so that it is easy to achieve high integration of the board.

Furthermore, since the ground pattern is not required to have a high position and positional accuracy with respect to the shield plate, the degree of freedom in pattern design is increased, and it is possible to further facilitate high integration of the board.

[0022] Furthermore, the board can be easily removed, and an excellent ground for electronic equipment can be realized which improves workability and productivity.

[Brief explanation of the drawing]

[Fig. 1] A configuration diagram of a ground for electronic equipment in an embodiment of the present invention.

[Figure 2] Perspective view of spring

[Figure 3] Configuration diagram of conventional grounding for electronic equipment

[Explanation of symbols]

1 Board 2　Earth pattern 3 Shield plate 4 Screws 5 Cutting and raising the shield plate 6 Boss 7 Spring

Claims (1)

[Claims] Claim 1: A boss installed upright on a cabinet board, a board, a fixture for fixing the board and the boss, a ground pattern arranged on the bottom surface of the board, a shield plate, and a connection between the shield plate and the board. A ground for electronic equipment characterized by having an elastic body connecting a ground pattern.