| 摘要 |
A supporting assembly includes a mounting seat secured to an object, an inner connecting member having a first end pivotally connected to the mounting seat, an outer connecting member having a first end pivotally connected to the mounting seat by an axle, a wrist member pivotally connected to a second end of the inner connecting member and a second end of the outer connecting member, and a supporting plate pivotally connected to the second end of the outer connecting member and the wrist member. A spring is mounted around the axle and includes a first end attached to the mounting seat and a second end attached to the outer connecting member. A pressing portion of the inner connecting member presses against a stop of the inner connecting portion. When the supporting plate is moved upward, the wrist member, the outer connecting member, and the inner connecting member are pivoted such that the pressing portion of the inner connecting portion disengages from the stop of the mounting seat to thereby allow subsequent downward movement of the supporting plate to a desired level. When the supporting plate is released, the outer connecting member, the wrist member, and the supporting plate are supported under the action of the torsion spring, and the pressing portion of the inner connecting member is moved to press against the stop of the mounting seat to retain the supporting plate at the desired level.
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