The jaws can rotate around the bottom hinged pin shaft.
锁舌是以其底部铰接销轴为中心的转动件。
The utility model is characterized in that the box board of a movable inner layer box is hinged with an outer layer box to form a double-layer box through a chain piece and a pin shaft.
该实用新型的特点是：活动的内层箱箱板通过链片和销轴与外层箱铰接成双层箱。
One end of a connecting rod on both sides of the screw nut is connected with the pin of a sliding chassis, and the other end is hinged with the screw nut.
螺母两侧的连接杆一端与滑动机架上的销轴连接，另一端与螺母铰链。
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