JPH0230861Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to a cover opening/closing device used for switch covers built into electronic equipment such as telephones and intercoms.

Structure of a conventional example and its problems FIG. 1 shows a conventional cover opening/closing device. The structure of this conventional example will be explained below with reference to FIGS. 1 to 3.

In the figure, 1 is the axis of the hinge structure, and this axis 1 is formed in the main body 2. Reference numeral 3 designates an opening/closing cover, and a bearing is constructed by fixing a plate spring 4 to this opening/closing cover 3 with screws. The hinge structure is completed by pushing the bearing consisting of the opening/closing cover 3 and the leaf spring 4 onto the shaft 1 from above using the springiness of the leaf spring.

Next, the operation of the above conventional example will be explained. In the figure, when opening/closing cover 3 is opened, opening/closing cover 3
A frictional force proportional to the compressive force between the bearing part and both ends of the leaf spring 4 acts, and when the vehicle is stopped, static friction causes the opening/closing cover 3 to close.
balances with its own weight and becomes fixed.

However, in the conventional example described above, since the locking method uses friction, there are drawbacks such as unstable holding force due to variations in component precision, damage to components from opening too much, friction due to repeated opening and closing, and lack of locking feeling. It was hot.

Purpose of the invention The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional example, and to make the opening/closing lock of the opening/closing cover with a hinge structure reliable with a feeling of locking, and to lock at a necessary constant angle. It is something to do.

Structure of the invention In order to achieve the above object, the present invention changes the cross-sectional shape of the shaft from a circular shape to a rectangular square with this circle as the circumscribed circle, and furthermore, the both ends of the leaf spring are made to coincide with one side of this square. If both ends of the leaf spring match one side of the shaft when closed,
Opening and closing from the closed position to 90 degrees will cause elastic deformation of the leaf spring, and once it reaches 90 degrees, it will be in the same stable state as the closed position again, obtaining the 90 degree lock effect. It is something.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. The structure is similar to the conventional example, except for the shape of the shaft 1' and the shape of both ends of the leaf spring 4'.

Next, the operation of the embodiment will be explained. In FIG. 5, view a shows the closed state, in which the shaft 1' contacts the bearing portion of the openable/closable cover 3 at two points and coincides with both ends of the leaf spring 4'. Next, in figure b, the opening/closing cover 3 has started to open and has just been opened to 45 degrees, and the shaft 1' is in contact with the bearing part of the opening/closing cover 3 at three points, and the remaining one point of the shaft 1 is When the leaf spring 4' is deformed to the maximum and is in contact with it, and it is further opened from 45 degrees to 90 degrees, the deformation of the leaf spring 4' begins to recover, and when it has just opened to 90 degrees, it closes. As in the above state, the shaft 1' and both ends of the leaf spring 4' are aligned, resulting in a stable state, that is, a locked state.

This embodiment has the advantage that reliable locking is possible in the 90 degree open state by making the shaft 1' square and by using a spring as part of the bearing structure to utilize elastic deformation.

The present invention allows locking at other angles by making the shaft shape other shapes such as pentagonal.

Effects of the invention The present invention has the above-mentioned configuration, and provides the following effects.

(a) The shaft is square and part of the bearing is elastically deformable, so it can be locked at a fixed angle.

(b) By changing the shape of the shaft and designing it, the lock angle can be changed, and the lock can also be made into a two-stage or three-stage type.

(c) In consideration of productivity, part of the bearing was constructed with a leaf spring, but the elasticity of this leaf spring can now be effectively utilized during use.

[Brief explanation of drawings]

Fig. 1 is an external view of a conventional switchgear, Figs. 2 and 3 are an exploded perspective view and an assembled sectional view of the conventional example shown in Fig. 1, and Figs. 4 and 5 a to c are respectively the present invention. FIG. 2 is an exploded perspective view and a sectional view of the opening/closing device in an assembled state in one embodiment. 1'...Shaft, 2...Main body, 3...Opening/closing cover,
4'...Plate spring.

Claims (1)

[Scope of utility model registration request] It is composed of a main body and an opening/closing cover that is attached to the main body so as to be openable and closable. It has an arc-shaped bearing part, and a leaf spring that is installed in the bearing part and has both ends pressing the shaft against the bearing part, and both ends of the leaf spring have an arcuate shape having a cross-sectional shape of the shaft. A cover opening/closing device characterized by having a shape that matches one side of a polygon.