JPS5929314Y2 - Knob mechanism for push switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knob mechanism for a bushing switch, and particularly to a knob mechanism that is most suitable for a large bushing switch.

Conventional bush switch knobs, especially those of the type that rotate around point E as a fulcrum as shown in Figure 1,
When the knob is pressed, the knob body 11 draws an arc as shown by the broken line, resulting in a large displacement in the vertical direction, and it is necessary to provide a large clearance between the knob body 11 and the escutcheons 12 and 13.

In addition, the force required for activation is significantly different between a portion 14 near the fulcrum E of the knob body 11 and a portion 15 far from the fulcrum E, and the mounting position of the switch 16 also needs to be adjusted in relation to the stroke of the knob.

The object of the present invention is to provide a knob mechanism for a bushing switch that eliminates the above-mentioned conventional drawbacks.

Embodiments of the present invention will be described below based on the drawings from FIG. 2 onwards.

In the figure, 1 is a knob body for a bushing switch, and the rear end surface is a beveled surface 2.

Reference numeral 3 denotes a mounting member having a beveled surface 4 parallel to the beveled surface 2 and disposed at a slightly offset position from the knob body 1.

Reference numeral 5 denotes a resilient member attached between the two beveled surfaces 2 and 4, and includes four hinge portions and two openings.

It has two parts and is arranged in a substantially diamond shape.

In the example shown in FIGS. 2 and 3, this resilient member 5 consists of two opposing members 6 and 7 formed in a "U" shape, and a spring 8 is attached at least to the opening and 8 of the hinge part. It has elasticity and elasticity.

Further, in the example shown in FIG. 4, the resilient member 5 is formed by synthetic resin molding, and each hinge part has two openings (A) and (C).

It is constructed by bending a single thin plate into a diamond shape.

The wall thickness of the hinge parts A and 2 is made thicker than the wall thickness of the hinge part opening, thereby forming a diamond shape and imparting elasticity.

That is, if each hinge part has the same wall thickness, the elastic member 5 becomes a rectangle, which makes it impossible to apply an appropriate elastic force to the knob body 1.

In the figure, 9 is a switch, and 10 is an escutcheon.

In the knob mechanism for a bush switch configured as described above, when the knob body 1 is pushed in the direction of the arrow as shown in FIG. 1 moves in parallel with almost no displacement in the vertical direction.

That is, as shown in FIG.
, 10 can be reduced, resulting in smooth operation.

Additionally, since the strokes of the fulcrums A-A' and B-B' are the same, the conditions do not change no matter where the switch 9 is installed, and the knob body 1 operates with uniform force no matter which part is pressed. do.

According to the knob mechanism for a bushing switch of the present invention, smooth operation can be obtained even with a fairly large bushing knob because there is no frictional contact part, and the vertical displacement of the knob body is extremely small, reducing the clearance between it and the escutcheon. It can be set to the minimum, and since the knob body moves almost in parallel, the switch can be installed in any position.

In addition, the knob itself operates properly and smoothly with uniform force no matter where you press it, and has a very good pressing feel.

The knob mechanism has no other adjustment points and is easy to assemble, making it ideal as a knob mechanism for this type of bush switch.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional knob for a bushing switch, Figs. 2 to 5 show an embodiment of a knob □ for a bushing switch according to the present invention, and Fig. Figure 3A
is a side view of the resilient member, FIG. 3B is a perspective view with a portion of the same as above removed, FIG.
Figures A and B are explanatory diagrams showing the stroke position of the knob body. 1...Knob body, 2...Beveled surface, 3
...Mounting member, 4...Beveled surface, 5...
...Bulletage member, 12 holes. C, 2...4 hinge parts, 9...switch.

Claims (1)

[Scope of utility model registration request] a knob body for a bushing switch whose rear end surface is a beveled surface; a mounting member having a beveled surface parallel to the beveled surface and disposed offset from the knob body; and a mounting member provided between the both beveled surfaces. A knob mechanism for a bushing switch, characterized in that it comprises a resilient member having four hinge parts and arranged in a substantially diamond shape.