释放元件，该释放元件相对于所述基座元件围绕枢转轴线可枢转地安装；

The release member is pivotally mounted relative to the base member about a pivot axis.

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所述基部、所述压紧部和所述杠杆借助于弹簧可活动地组装在一起，使得所述杠杆可绕着支撑所述弹簧的枢转轴可转动地装配在基部上。

Said base, said lever and said pressing part can be assembled together actively through springs, so said lever can be assembled on the base rotating around the pivotal axis supporting said springs.

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在另一实施例中，第二框架由多个组件所构成，其中至少一组件借由固定转轴而枢设于第一框架上。

In another example, the second frame is made up of several components; at least one of them is pivoted on the first frame with the fixed spindle.

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