| 摘要 |
The invention relates to a switch device which is suitable for use, for example, in a telephone to detect the presence of the handset (11) in the cradle (9). The switch device comprises a frame (3), a switch (4) movable in relation to the frame, and a separate plunger (2) acting on the switch, the plunger comprising a press knob (5) and a spring part (6). The plunger operates by bringing the switch (4) into the connecting position and by releasing it, after the pressure has ceased, to return to the initial position. It is essential in the invention that the spring part (6) of the plunger comprises a part which is against the switch (4) and is wider than the switch, is of a resilient material and hollow. This part (6) may be made up, for example, of a transverse sleeve or ring as an extension of the press knob (5). When the plunger has brought the switch (4) to the connecting position and the pressure continues, the spring part will receive the pressure by bearing on the frame of the device on the different sides of the switch and by yielding at the same time by flattening.
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