JPH0743809A - Structure for mounting external member of apparatus - Google Patents

Abstract

PURPOSE:To prevent the electrification of a flexible substrate with static electricity via screws from the outside of an apparatus and the consequent breakdown of circuits with the simple constitution in the structure for mounting external members which screws these external members to an apparatus body by interposing the flexible substrate or metallic plate. CONSTITUTION:This structure for mounting the external members of the apparatus is constituted to co-fasten the metallic plate 3 and the flexible substrate 4 to a mold member 5 by arranging the metallic plate 3 to the apparatus body which is the mold member 5, arranging the flexible substrate 4 on the metallic plate 3 and screwing the external members 2 to the mold member 5. Seats 5a enclosing screws 1 are formed on either one of the external members 2 or the mold member 5 to insulate the metallic plate 3 and the screws 1. The breakdown of the electrical circuits by the static electricity flying from the joints of the screws fastening the external members 2 and the external members to each other is thus prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior member mounting structure for a device such as a camera, and more specifically, it is disposed inside the external member through a screw for fixing the external member of the device or a joint between the external members. The present invention relates to an exterior member mounting structure for a device, which prevents static electricity charged by a user from being blown onto a metal plate that is present and destroying an electric circuit of a flexible printed board.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 2, a mounting structure of an exterior member at the bottom of a camera is such that the exterior member 2 is attached by a screw 1 to a mold member 5 forming a part of the camera body. On the upper surface of the mold member 5, there is arranged a metallic plate 3 for holding components such as gears of a film feeding system housed in the mold member 5, and further on the upper surface of the metal plate 3. A flexible printed board (hereinafter abbreviated as “flexible”) 4 is arranged, and by tightening a screw 1, an exterior member 2 causes a base plate 3 and a flexible 4
Are integrally fixed to the mold member 5 together.

By the way, in such a mounting structure,
Static electricity from the outside may fly to the metal plate 3 through the screw 1 and the electronic circuit of the flexible 4 inside may be destroyed. To prevent this, connect the GND part of the flexible 4 to the metal plate 3, or It has been proposed to provide an insulating sheet between the metal plate 3 and the exterior member 2.

[0004]

However, the above-mentioned measures against static electricity of the prior art have the following drawbacks.

(1) In order to bring the GND and the metal base plate 3 into contact with each other, it is necessary to arrange lead wires and solder them, which requires a large space, which is an obstacle to miniaturization of the product.

(2) The number of parts such as lead wires and insulating sheets is increased, and the number of assembling steps is also increased, so that the cost is increased.

The present invention solves these conventional problems,
With a simple structure, static electricity from the outside of the device will fly to the metal plate,
It is an object of the present invention to provide a device exterior member mounting structure capable of effectively preventing damage to an internal flexible electric circuit.

[0008]

[Means and Action for Solving the Problems] The structure for realizing the object of the present invention is as described in the claims.
A metal plate is arranged with respect to the device body, a flexible substrate is arranged on the metal plate, and an exterior member is screwed to the device body, so that the metal plate and the flexible substrate are attached to the device body. In an exterior member mounting structure of a device to be fastened together, a seat surrounding the screw is formed on one of the exterior member or the device body, and the metal plate and the screw are insulated from each other, It is possible to prevent the electric circuit of the flexible substrate from being destroyed by the static electricity that is blown to the metal plate from the screw that fixes the exterior member or the joint between the exterior members.

[0009]

FIG. 1 shows a first embodiment of the present invention.
In the figure, 1 is a screw for fixing the exterior member 2 of the camera body, 3 is a metal plate, 4 is a flexible substrate,
Reference numeral 5 denotes a seat for fixing a screw of a molding member that constitutes the camera body, for example.

When the metal plate 3 and the exterior member 2 are fastened together with the mold member 5, a screw-fastening seat 5a of the mold member 5 penetrates the metal plate 3 and the flexible member 4 and projects toward the exterior member 2 side. To do.

That is, holes 3a, 4 formed in the metal plate 4 and the flexure 3 in the stepped seat 5a.
By adopting a structure in which a is fitted, static electricity flying from the outside of the external appearance member 2 to the flexible member 3 through the screw 1 and the metal plate 4 can be prevented by interposing the seat 5a of the mold member 5.

FIG. 3 is a sectional view showing another embodiment of the present invention.

In this embodiment, a cylindrical protrusion 2a through which the screw 1 passes is formed on the external member 2, and the cylindrical protrusion 2a is brought into contact with the mold member 5. Then, the metal plate 3 and the holes 3a, 4a of the flexible member 4 are fitted into the cylindrical projection 2a.

Therefore, when the metal plate 3 and the exterior member 2 are fastened together with the mold member 5, the protrusion 2 of the exterior member 2 is tightened.
The structure in which a is projected through the metal plate 3 and the flexible member 4 toward the mold member 5 side allows static electricity to fly from the outside of the outer appearance member 2 to the flexible member 4 through the screw 1 or the metal plate 3 to the protrusion 2a of the outer appearance member 2. Can be prevented by interposing.

[0015]

As described above, according to the present invention, it is possible to prevent the electric circuit from being destroyed by the static electricity flying from the screw holding the exterior member or the joint between the exterior members to the flexible substrate through the metal plate through the metal plate. effective.

[Brief description of drawings]

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

FIG. 2 is a sectional view showing a conventional mounting structure.

FIG. 3 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Screw 2 ... Appearance (exterior) member 3 ... Metal plate 4 ... Flexible substrate 5 ... Mold member

Claims (1)

[Claims] 1. A metal plate is arranged on a device body, a flexible substrate is arranged on the metal plate, and an exterior member is fixed to the device body with a screw, thereby separating the metal plate and the flexible substrate. In a device exterior member mounting structure that is fastened together with a device body, a seat that surrounds the screw is formed on either the exterior member or the device body, and the metal plate and the screw are insulated from each other. External device mounting structure for equipment to be used.