Abstract: The present application relates to the technical field of linkage mechanisms, and provides a linkage operation assembly, a fall protection device and a fall protection system. The linkage operation assembly includes a fixed main body configured to be installed on an outer support surface of a rail and move along the rail; a second wheel body assembly installed on the fixed main body for rolling along an inner support surface of the rail and including a second wheel set and a drive rotary shaft; a third wheel body assembly installed on the fixed main body for rolling along an inner support surface of the rail and including a third wheel set and a driven rotary shaft; and a linkage member disposed between the drive rotary shaft and the driven rotary shaft. When the drive rotary shaft of the linkage operating assembly rotates, the second wheel set is driven to rotate, and the driven rotary shaft and the third wheel set are driven to rotate through the linkage member.

Abstract: A rope locking apparatus, comprising: a locking member (11) adapted to switching between a locked state and an unlocked state with a rope (100); a roller (22) adapted to being pressed against the surface of the rope (100) under the action of a pressing member; a rotating shaft (25) adapted to rotating along with the roller (22); a centrifugal member, which is mounted on the rotating shaft (25) and rotates along with the rotating shaft (25), wherein the centrifugal member switches between a centrifugal state and a reset state along with change in a centrifugal force; and a driving member, wherein the centrifugal member in the centrifugal state drives the driving member to move, so that the locking member (11) moves until same is in the locked state; and the centrifugal member in the reset state is separated from the driving member, so that the locking member (11) is in the unlocked state.

Abstract: A rope locking apparatus includes a main shaft and a friction wheel pair having friction surfaces used for clamping a rope. A centrifugal member is switches between a centrifugal state and a reset state as the rotation speed of the friction wheel pair changes The centrifugal member drives the main shaft to rotate when it is in the centrifugal state, and is separated from the main shaft when it is in the reset state. The two friction wheels are respectively installed at two ends of the main shaft. A lock located between the two friction surfaces and arranged on the main shaft is adapted to rotate along with the main shaft, to make the lock switch between a locked state and an unlocked state. In the centrifugal state, the main shaft drives the lock to the locked state; and in the reset state, the lock is in the unlocked state.

Abstract: The present application relates to the technical field of linkage mechanisms, and provides a linkage operation assembly, a fall protection device and a fall protection system. The linkage operation assembly includes a fixed main body configured to be installed on an outer support surface of a rail and move along the rail; a second wheel body assembly installed on the fixed main body for rolling along an inner support surface of the rail and including a second wheel set and a drive rotary shaft; a third wheel body assembly installed on the fixed main body for rolling along an inner support surface of the rail and including a third wheel set and a driven rotary shaft; and a linkage member disposed between the drive rotary shaft and the driven rotary shaft. When the drive rotary shaft of the linkage operating assembly rotates, the second wheel set is driven to rotate, and the driven rotary shaft and the third wheel set are driven to rotate through the linkage member.

Abstract: The present application relates to the technical field of aerial climbing and transportation operations, and provides a fall protection locking assembly, a fall protection device and a fall protection system.

Abstract: A stencil step design method and system, a computer readable storage medium and a device. The method comprises: acquiring data of stencil apertures for electronic components in a circuit board, and identifying the stencil apertures for electronic components one by one to determine whether the stencil apertures need to be stepped; and if yes, performing step design for the stencil apertures that need to be stepped according to preset step rules corresponding to the stencil apertures for electronic components one by one so as to generate a stencil step design file with the step design, and outputting the stencil step design file. According to the present disclosure, 90% or more steps can be automatically designed and the stencil step design is in conformity with processing requirements. A manual intervention process is omitted, and the design can be accomplished by several simple steps.

Abstract: A motor shaft includes a main body and a chamfered end formed at an end of the main body. The chamfered end has a chamfer formed at a peripheral surface thereof, and a groove defined in an end surface thereof. An axial length of the chamfer is greater than a depth of the groove in the axial direction of the motor shaft. An electric motor including the motor shaft is also provided.

Abstract: A stator includes a stator core and three phase windings wound on the stator core. The stator provides a neutral point terminal, each of the three phase windings comprises a phase connecting end and a neutral point connecting end, the neutral point connecting end of each of the three phase windings is fixed to and electrically connected to the neutral point terminal. The neutral point connecting ends of the three phase windings are electrically connected together at outside of the circuit board. The circuit board does not need to provide extra space or wiring layer to achieve the combination of the neutral point connecting ends of the three phase windings.

Abstract: A motor shaft includes a main body and a chamfered end formed at an end of the main body. The chamfered end has a chamfer formed at a peripheral surface thereof, and a groove defined in an end surface thereof. An axial length of the chamfer is greater than a depth of the groove in the axial direction of the motor shaft. An electric motor including the motor shaft is also provided.

Abstract: A toilet seat includes a body with a plurality of massage mechanisms installed in the body, and means for sealing the massage mechanisms. The massage mechanism includes a housing which comprises an upper part and a lower cover part, a motor held between the upper part and the lower cover part, an eccentric weight fixed to the output shaft of the motor, and a resilient suspension device for suspending the assembly of the motor, the eccentric weight and the housing inside the body. The suspension device includes a housing fixing end fixed to the housing, a body fixing end fixed to the body, and a connecting part connected between the two fixing ends. In use, the motor rotates the eccentric weight to thereby produce vibrations which are transmitted to a user sitting on the seat.

Abstract: A toilet seat includes a body with a plurality of massage mechanisms installed in the body, and means for sealing the massage mechanisms. The massage mechanism includes a housing which comprises an upper part and a lower cover part, a motor held between the upper part and the lower cover part, an eccentric weight fixed to the output shaft of the motor, and a resilient suspension device for suspending the assembly of the motor, the eccentric weight and the housing inside the body. The suspension device includes a housing fixing end fixed to the housing, a body fixing end fixed to the body, and a connecting part connected between the two fixing ends. In use, the motor rotates the eccentric weight to thereby produce vibrations which are transmitted to a user sitting on the seat.