Patent ID: 9431280
Filing Date: 2016-08-30
CPC Classification: E05Y,H01L,Y10T

Claim Text:
1. A self-lockable opening and closing mechanism, comprising: a frame being a hollow frame formed of a base portion, two side panels and a top panel; a driving cylinder mounted at said base portion within said frame, said driving cylinder comprising a reciprocatable driving shaft; a horizontal lever fixedly connected to said driving shaft; at least one first bar each having one end thereof pivotally connected to said horizontal lever; at least one rotational lever each comprising a first pivot hole, a second pivot hole and a third pivot hole respectively located at three corners of a triangular profile thereof, the first pivot hole of each said rotational lever being pivotally connected to an opposite end of one respective said first bar; at least one adjustment block respectively pivotally connected to the second pivot hole of one respective said rotational lever; at least one second bar each having one end thereof pivotally connected to the third pivot hole of one respective said rotational lever; at least one sliding block respectively slidably mounted at one respective said side panel within said frame and respectively pivotally connected to an opposite end of one respective said second bar; a vacuum cabin door; and at least one valve rod each having one end thereof connected to one respective said sliding block and an opposite end thereof connected to said vacuum cabin door for moving said vacuum cabin door between an open position and a close position.