Joint locking device and crutch chair provided with joint locking device

Abstract

The invention discloses a joint locking device and a crutch chair provided with the joint locking device. The joint locking device comprises a foot rest unit and a joint locking unit. The foot rest unit comprises first foot rods, and second foot rods in pivot joint with the first root rods. The joint locking unit comprises sliding rods slidably arranged at the first root rods by being opposite to the first foot rods and locking blocks which are arranged on the second foot rods and corresponds to the sliding rods. The locking blocks are provided with rotary shafts, sliding surfaces with the rotary shafts as the circular centers and locking surfaces. The distances between the locking surfaces and the rotary shafts are less than the radii of the locking surfaces of the sliding surfaces. The joint locking device and the crutch chair provided with the joint locking device have following beneficial effects: the joint locking unit can located at either locking position and unlocking position; at the locking position, the sliding rods are embedded between locking surfaces and first foot rods such that the first foot rods and the second foot rods are relatively fixed; at the unlocking position, the sliding rods are separated from the sliding surfaces such that the first foot rods can pivotally rotate relative to the second foot rods; and convenience and safety of using the crutch chair are improved.

Description

technical field [0001] The invention relates to a chair, in particular to a joint locking device and a crutch chair with the joint locking device. Background technique [0002] Generally, the movable crutch chair installed on the main pole of the crutch is mainly to allow the user to rest freely on the way to restore physical strength according to his physical condition during walking. Therefore, the crutch chair must be easy to use and provide The effect of firm support. [0003] Such as the patent No. US2,380,437 and the U.S. patent No. US3,999,565, or the crutch chair disclosed in Taiwan Patent No. 102113330, mainly all have a support bar and can be folded close to the support bar respectively. A set of legs and a seat. However, when the above-mentioned existing crutch chairs are unfolded and folded, the user needs to manually operate the set of legs. The convenience in use is insufficient, and the legs of the existing crutch chairs There is no locking device, and the s...

AI Technical Summary

Problems solved by technology

[0004] Therefore, in view of the deficiencies in the structure and use of the existing crutch chairs, the inventor has finally developed a new invention that can solve the deficiencies of the existing crutch chairs after continuous research and testing.

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