Terminal pin with adjustable aperture

The invention relates to an aperture-adjustable terminal pin which is provided with a first grip, a second grip, a connecting rod, a rotating mechanism, a movable sleeve and other mechanisms, and the movable sleeve is clamped in a hole of a terminal strip by inwards extruding the first grip and the second grip. And the movable sleeve is made of a rubber material, so that the terminal hole fixing device has certain fixing capability aiming at terminal holes with different hole diameters. The clamping sleeve is arranged, the contact pin is in threaded connection with the clamping sleeve, and when necessary, the clamping sleeve is used for being connected with electrified equipment, so that the flexibility of the device is improved. The two rotating mechanisms are fixed through threads, so that the first grip, the second grip, the connecting rod, the rotating mechanisms, the movable sleeve and other mechanisms can be detached, for mechanisms which are extremely small in aperture and can only allow insertion pins