A connection device applicable to flexible display screen includes a joint assembly composed of main joints and subsidiary joints. Each main joint has a base section and a first arm and a second arm. The base section and the first and second arms define a first chamber, a first opening and a second chamber and a second opening. Each subsidiary joint has a connection section assembled with the flexible display screen and a first hand section and a second hand section extending from two ends of the connection section. The first and second hand sections respectively extend into the first and second chambers of two adjacent main joints and latch therewith. When an operator operates and opens/closes the display screen, the subsidiary joints relatively move within the first and second chambers of the main joints to drive the main joints to move.

A device is provided for positioning an object with respect to another object. The device includes a linkage having an extended condition and a collapsed condition, the linkage including at least one pair of links coupled to one another about a pivot rotation axis. The device also includes a friction element positioned at the pivot rotation axis of the at least one pair of links of the linkage. A spring of the device is positioned to apply bias to the links of the at least one pair of links of the linkage. The device is configured to resist unintended movement of the object from the user-adjusted position along the path and to facilitate intended movement of the object proximally toward or distally away from the other object.

A connection device applicable to flexible display screen includes a joint assembly composed of main joints and subsidiary joints. Each main joint has a base section and a first arm and a second arm. The base section and the first and second arms define a first chamber, a first opening and a second chamber and a second opening. Each subsidiary joint has a connection section assembled with the flexible display screen and a first hand section and a second hand section extending from two ends of the connection section. The first and second hand sections respectively extend into the first and second chambers of two adjacent main joints and latch therewith. When an operator operates and opens/closes the display screen, the subsidiary joints relatively move within the first and second chambers of the main joints to drive the main joints to move.

A multi-joint bending structure includes: a first-band-piece including joint potions on both ends; bending-units enabling the multi-joint-bending-structure to change in position between a straight state and a bent state; a third-band-piece including a joint potion provided on one end, the joint portion connected to the joint potion of the end of one of the bending-units; one pair of two linear bodies, each of the linear bodies having one end fixed to the housings and another end movable along the housings; and an assisting-force-generation-mechanism provided at predetermined opposed positions of the pair of two linear bodies and configured to generate assisting force, wherein the assisting-force-generation-mechanism includes rod-like bodies, a contracting-elastic-body inserted into the gap, and two piece members which both the ends of the overlapping potions energized by the piece members switch over, and the contracting force of the elastic-body acts as the assisting force between both the ends.