Abstract: The welding shaft for a universal wheel includes a big wheel welding shaft and a small wheel welding shaft, wherein the big wheel welding shaft includes a big wheel welding shaft body, a big wheel welding shaft retainer ring and a big wheel welding shaft fixing head which are sequentially assembled into a whole. The small wheel welding shaft includes a small wheel welding shaft body, a small wheel welding shaft retainer ring and a small wheel welding shaft fixing head which are sequentially assembled into a whole. The wheel assembly for a universal wheel includes a wheel shaft fixing plate, the welding shaft, a big wheel, and a small wheel. The universal wheel includes an outer protection plate, an outer fixing plate, a wheel shaft drive connector, multiple wheel assemblies, an inner fixing plate, an inner protection plate, and multiple shock absorption assemblies.

Abstract: Disclosed is a twin-pedal-controlled swivel caster, comprising a caster body frame (1), a pair of caster assemblies (2) disposed at two sides of the caster body frame (1), a swivel assembly (5) disposed on the caster body frame (1), and a braking module (3) capable of braking by stepping on a braking pedal (32) and a brake release module (4) capable of resetting the movement of the caster by stepping on a braking release pedal (41), both of which are disposed in the caster body frame (1). By means of the pedals, the swivel caster can both lock the rotation of a wheel plate of the caster and lock the direction of rotation of the caster, and can also release the dual-locked state by means of the braking release pedal (41) located in the same direction as the braking pedal (32), making the caster return to a state of full freedom again. The braking and braking release actions of the swivel caster are convenient and easy, and the swivel caster is simple to operate.

Abstract: The present invention relates to the walking aid field. The present invention provides a walking aid, including a support frame, with a plurality of support legs disposed at a bottom of the support frame, and omni-directional wheels disposed on the support legs, wherein a buffering structure is further disposed between each support leg and each omni-directional wheel. In the walking aid provided by the present invention, a buffering structure is disposed between a support frame structure and an omni-directional wheel of the walking aid.

Abstract: The present invention relates to the walking aid field. The present invention provides a walking aid, including a support frame, with a plurality of support legs disposed at a bottom of the support frame, and omni-directional wheels disposed on the support legs, wherein a buffering structure is further disposed between each support leg and each omni-directional wheel. In the walking aid provided by the present invention, a buffering structure is disposed between a support frame structure and an omni-directional wheel of the walking aid.

Abstract: Disclosed is a twin-pedal-controlled swivel caster, comprising a caster body frame (1), a pair of caster assemblies (2) disposed at two sides of the caster body frame (1), a swivel assembly (5) disposed on the caster body frame (1), and a braking module (3) capable of braking by stepping on a braking pedal (32) and a brake release module (4) capable of resetting the movement of the caster by stepping on a braking release pedal (41), both of which are disposed in the caster body frame (1). By means of the pedals, the swivel caster can both lock the rotation of a wheel plate of the caster and lock the direction of rotation of the caster, and can also release the dual-locked state by means of the braking release pedal (41) located in the same direction as the braking pedal (32), making the caster return to a state of full freedom again. The braking and braking release actions of the swivel caster are convenient and easy, and the swivel caster is simple to operate.

Abstract: An ultrasound lithotrite comprises a handle main body (1) and a hand-held portion (2) connected to the handle main body (1), and an ultrasound generator (15) is disposed in the handle main body (1). A first channel (111) is disposed on an internal central axis of the handle main body (1), a second channel (211) is disposed on the internal central axis of the hand-held portion (2), and the first channel (111) and the second channel (211) are on the same straight line. The ultrasound lithotrite further comprises an ultrasound forceps (3) connected to the ultrasound generator (15) and passed through the first channel (111) and the second channel (211) for gripping a stone. The back end of the ultrasound forceps (3) is provided with a horizontal limiting slot (32), and the ultrasound forceps (3) are fixed to the hand-held portion (2) through the horizontal limiting slot (32) and are moved horizontally along the first channel (111) and the second channel (211) with the hand-held portion (2).