| 摘要 |
A control mechanism includes a control, a mounting plate, and a printed circuit board. The control includes a rotary main body, a contact member connected to the rotary main body, and at least one limiting protrusion extending from a side of the rotary main body. The mounting plate includes a through hole receiving the control, and a blocking portion extending from an inner surface of the through hole. The blocking portion defines at least one cutout. The printed circuit board includes a resilient contact. The at least one limiting protrusion is blocked by the blocking portion until the rotary main body is rotated to a portion whereby the at least one limiting protrusion aligns with the at least one cutout, such that the contact member impels the resilient contact.
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