JPH0218499Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a pressing mechanism for an operating shaft of a push button switch that is offset in both directions from a key top fitted into a panel surface.

[Prior art]

The pressing mechanism of a conventional push button switch of this type is shown in the sectional view of FIG.

The key top 3 fitted into the guide 2 on the panel surface 1 and the operating shaft 5 of the push button switch 4 are misaligned in both directions, and the key top 3 is connected to the operating shaft 5 by a joint 6 bent in a crank shape. ing. 7 is the tsuba of keytop 3, and 8
and 9 are springs for returning the key top 3 and switch 4.

However, in such a coupling structure between the key top 3 and the operating shaft 5, the length of the portion 10 of the joint 6 located inside the key top 3 cannot be made shorter than the height of the key top 3. If the height is less than the height of the key top 3, one end of the joint 6 will not come into contact with the top 12, and the bent portion 11 will come into contact with the collar 7, making the vertical movement of the key top 3 unstable. In any case, the bent part 11 of the joint 6 must be below the flange 7, and the operating shaft 5 is connected below it, so if the distance D between the main body of the switch 4 and the panel surface 1 is narrow, It becomes difficult to combine. Although it is possible to lower the height of the key top 3, there is a limit to maintaining the smooth movement of the key top 3 in the guide 2.

〔assignment〕

An object of the present invention is to provide a switch pressing mechanism which can sufficiently cope with the case where the distance D between the main body of the switch 4 and the panel surface 1 is narrow and can maintain smooth movement of the key top 3.

[Means to solve the problem]

The present invention is a cylindrical key top that is fitted into the panel surface with the top exposed and the opposite side from the top is open, and is bent in a crank shape and has one end in contact with the top of the key top. In a switch pressing mechanism consisting of a joint that is fitted into a key top and whose other end is connected to the operation shaft of a push button switch that is displaced from the key top in the plane direction, a cut groove is provided on the side surface of the key top, It is characterized in that the bent portion of the joint is located in the cut groove.

〔Example〕

Hereinafter, an explanation will be given with reference to FIGS. 2 and 3 showing an embodiment of the pressing mechanism of the switch according to the present invention. 2 is a sectional view, and FIG. 3 is an exploded perspective view of FIG. 2, in which the same parts as in FIG. 1 are given the same reference numerals.

In FIGS. 2 and 3, 20 is the panel surface, 2
1 is a guide provided inside the panel surface 20, 22 is a key top, 23 is a joint, 24
is the guard of key top 22. The panel surface 20 shows only the vicinity where the key top 22 is fitted.

The key top 22 is opened at the bottom and the tsuba 2
4 and is formed into a rectangular tube shape. Further, a cut groove 26 extending to the end of the collar 24 is formed in the lower part of one side surface 25. When the key top 22 is fitted into the panel surface 20 at the guide 21, the cut groove 26 is positioned so as not to be exposed to the outside of the panel surface 20. Guide 21 is on panel surface 2
0 is integrally formed in a circular shape, and a cutout 27 is formed on one side. key top 2
2 is fitted, the cut groove 26 of the side surface 25 and the cutout portion 27 are arranged to substantially overlap.
31 is a spring for returning the key top 22. And joint 2 bent into a crank shape
One end 28 of the key top 22 is brought into contact with the top 30 of the key top 22, and the operating shaft 5 of the push button switch 4 is fitted inside from the tip of the other end.
2 and the operating shaft 5 of the switch 4, which is misaligned in both directions.
combine.

The bent portion 29 of the joint 23 is located within the kerf 26 and cutout 27. The key top 22 and the switch 4 are thus connected, and by pressing the key top 22 from outside the panel surface 20, the force is transmitted to the operating shaft 5. Note that in the embodiment, the cut groove 26 extends from the side surface 25 to the collar 24;
In some cases, the tsuba does not exist around the entire periphery from the beginning, so it may be necessary to form it only on the sides of the key top.

〔effect〕

The push mechanism of the switch of the present invention allows the bent part to be positioned closer to the panel surface than before by forming a groove in the key top to position the bent part of the joint, regardless of the presence of the collar or the height of the key top. can be done. Therefore, it is possible to connect even if the distance D between the panel surface and the main body of the switch is narrow, and even if the length of the joint is shortened, the bent part does not come into contact with the key top and the key top maintains smooth movement. be able to. Note that the cut grooves can be prevented from being exposed on the outside of the panel surface, so the appearance will not be worse than before.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the pressing mechanism of a conventional switch.
Figure 2 is a sectional view of the pressing mechanism of the switch of the present invention.
FIG. 3 is an exploded perspective view of FIG. 2. 1, 20: Panel surface, 3, 22: Key top,
4: Push button switch, 5: Operation axis, 6, 2
3: Joint, 7, 24: Tsuba, 10: Part, 1
1, 29: bent part, 12, 30: top, 25: side, 26: kerf.

Claims (1)

[Scope of utility model registration request] A cylindrical key top that is fitted into the panel surface with the top exposed and the side opposite to the top open.
A switch that is bent into a crank shape and is fitted into the key top with one end in contact with the top of the key top, and the other end is connected to the operating shaft of a push button switch that is offset from the key top in the plane direction. 1. A pressing mechanism for a switch, characterized in that a cut groove is provided on the side surface of the key top, and a bent part of the joint is located in the cut groove.