| 摘要 |
A leaf spring (26, 66) is mounted under compression to be bowed to a first bistable position against a push button surface (10b, 40c) to engage a latch surface (10d, 40d) upon depression of the button (10, 40) to an intermediate position and to be driven to a second bistable position by a cam (10e, 40e) upon subsequent further depression of the button (10, 40) to release the button. Bridging contacts (14, 44) are held closed upon stationary contacts (18, 20, 48, 50) when the button is latched. A drive spring (12, 42) forms a resilient connection between the push button (10, 40) and the switch contact mechanism.
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