A steering column includes a steering shaft, a fixing bracket, a first cylinder, a second cylinder, an angle adjustment motor, an angle adjustment screw-nut assembly, a linkage assembly, a height adjustment motor, and a height adjustment screw-nut assembly, where the second cylinder is slidably sleeved with the first cylinder, the steering shaft runs through the first and second cylinders, the steering shaft includes an upper shaft and a lower shaft that are in splined connection, the upper shaft is supported in the second cylinder through a first bearing, the lower shaft is supported in the first cylinder through a second bearing, the first cylinder is hinged to the fixing bracket, the angle adjustment motor can drive the first cylinder to rotate relative to the fixing bracket, and the height adjustment motor can drive the second cylinder to axially move relative to the first cylinder.

Medical devices in accordance with various embodiments of the present invention employ one or more coaxial screw gear sleeve mechanisms. In various embodiments, coaxial screw gear sleeve mechanisms include a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing the device to expand.

An adjusting drive for a steering column for a motor vehicle may include a threaded spindle with an external thread that engages in a spindle nut and a drive unit that is coupled to the threaded spindle or the spindle nut such that the threaded spindle and the spindle nut are able to be rotatably driven relative to one another by overcoming a screw resistance. To permit an optimized adjustment over the entire adjusting region, the threaded spindle includes at least one actuator portion and at least one transition portion. The transition portion is configured such that the screw resistance of the spindle nut is lower in the transition portion than in the actuator portion.

A bed assembly includes a bed having a head end, a foot end and a frame which is connected between the head end and the foot end. A water-proof pad is located between the head end and the foot end. The water-proof pad can be tightened, loosened and movable up and down. A bed board unit is pivotably connected to two sides of the frame so that the bed board unit is opened and closed when needed. An inflatable tub or bedpan is located beneath the bed so that when the bed board unit is opened, the patient can use the inflatable tub or the bedpan and does not have to be removed from the bed.

An actuator and a transmission structure thereof. The transmission structure (3) includes a screw nut (31) and a ratchet guiding sleeve (32). The screw nut (31) includes one or a plurality of pawls (311). The ratchet guiding sleeve (32) is mounted on the screw nut (31), and the screw nut (31) is able to rotate relative to the ratchet guiding sleeve (32). The ratchet guiding sleeve (32) includes a ring ratchet (321) disposed on an inner circumference thereof and a plurality of track slots (322) disposed on an outer circumference thereof. One or a plurality of pawls (311) abut against the ring ratchet (321), thereby achieving the effect of smooth movements of the actuator (10) and the transmission structure (3).

The present invention provides a double parallelogram vertical lifting device comprising a linkage mechanism and a pushing device. The linkage mechanism comprises a first shaft seat, a second shaft seat, a third shaft seat, an upper support unit movably coupled to the first shaft seat and the second shaft seat on both ends, and a lower support unit movably coupled to the second shaft seat and the third shaft seat on both ends. The upper support unit is provided with a first gear, and the lower support unit is provided with a second gear that meshes with the first gear. The pushing device has one end set on the upper support unit and the other end set on the lower support unit. The invention utilizes the interaction of the first gear and the second gear to generate a reaction force, which enables the lower support unit to cooperate with the upper support unit to move up and down synchronously, and achieves the effect of simple structure and large load capacity.

An electronic parking brake device may include: a plate part having a brake shoe rotatably mounted thereon; a housing part mounted on the plate part and configured to guide hydraulic pressure; a motor part mounted on the housing part, and driven when power is applied thereto; a piston part mounted on the housing part, and moved by hydraulic pressure so as to operate the brake shoe; and an operating part embedded in the housing part, and driven by the motor part so as to move the piston part.

A linear actuator (1) and the centrifugal safety device (50) thereof is disclosed. The safety device (50) includes an outer socket (51) having a stop portion (512) and a first accommodation portion (513), an inner socket (53) having a raised portion (531) and a second accommodation portion (532) and a centrifugal assembly (55) having a centrifugal block (551) and an elastic element (555). The inner socket (53) drives the centrifugal assembly (55) to rotate. If the centrifugal force of the centrifugal block (551) is smaller than the elasticity of the elastic element (555), then the centrifugal block (551) is limited in the second accommodation portion (532) by the elastic element (555), or else the centrifugal block (551) moves into the first accommodation portion (513) and clamped by the raised portion (531) and the stop portion (512).

A linear drive comprising a transmission housing and an electric motor which is connected thereto and which drives a mounted shaft which in turn drives a worm which meshes with a worm gear which is non-rotatably connected to a spindle on which runs a spindle nut, arranged displaceably in a guide tube. Provided between the guide tube and the spindle nut to ensure correct rotary angle orientation of the spindle nut, in relation to the guide tube are inner barsa and complementary guide grooves. To simplify machine-assisted mounting of the spindle nut, in the guide tube there are provided positional orientation means which implement correct rotary angle orientation of the spindle nut, upon insertion thereof into the guide tube in the push-in direction.

Methods and corresponding control devices for releasing an electric actuator in a reliable manner, such as an electric parking brake in particular, in a motor vehicle brake system. The aim of the invention is to provide an improved function and architecture which helps prevent the disadvantages of open-loop control systems when using a rationalized sensor system, thereby obviating closed-loop control systems. This is achieved by a release method and a corresponding electronic control unit which obtains an especially modulated change in the power requirement during the release process upon impacting the quasi-elastic release end stop of the electric actuating unit such that the change is fed back, the change being detected in order to be used as information for a power interruption or a termination of the power supply to the electric actuating unit.