Patent ID: 7514644

Claim:
A safety switch control mechanism installed in an instrument panel of an exerciser for controlling power supply of said exerciser, said safety switch control mechanism comprising: a linkage having a bracket and a pivot unit, said bracket being fixedly mounted to a side of said instrument panel, a pivot unit being mounted to said bracket, said instrument panel having a keyhole being formed at the other opposite side thereof, a micro switch being mounted to said instrument panel for switching on/off the power supply of said exerciser, said pivot unit having a wheel rotatably supported inside said bracket, said wheel having at least one hook portion, a holding portion, and a releasing portion, said at least one hook portion being formed at an outer periphery of said wheel, said holding and releasing portions being formed at a side of said wheel and in different planes; and a safety control key, said safety control key having a grip and a plate-like actuation portion extending from one end of said grip for inserting into said keyhole, said actuation portion having a through hole cut through two opposite sides thereof; wherein after said plate-like actuation portion of said safety control key is inserted into said keyhole, a sidewall of said through hole of said plate-like actuation portion of said safety control key drives clockwise rotation of said wheel to further shift said releasing portion for contact against said micro switch, so that said micro switch is driven to switch on the power supply of said exerciser, when said safety control key is pulled away from said keyhole, the sidewall of said through hole of said plate-like actuation portion of said safety control key drives counterclockwise rotation of said wheel to further shift said holding portion for contact against said micro switch, so that said micro switch is driven to switch off the power supply of said exerciser; wherein said wheel comprises a first stop face and a second stop face, said first stop face being formed at an outer periphery of said wheel, said second stop face being abutted against said first stop face; said linkage further comprises a limiting springy piece, said limiting springy piece having two ends, one of which is fixed to said instrument panel and the other end defined as a free end is stopped at said second stop face when said safety control key is inserted into said keyhole, said free end being stopped at said first stop face when said safety control key is detached from said keyhole.