50results about How to "Fast opening and closing speed" patented technology

A biaxial hinge in which a first casing and a second casing of a terminal device can open and close 360 degrees relative to each other, with a simplified structure, enhanced opening and closing speed and an improved operability. A first hinge shaft attached to the second casing via a first attaching plate is rotatable in parallel to a second hinge shaft attached to the first casing via a second attaching plate with help of several joint members. A module for restricting rotation of the first hinge shaft and the second hinge shaft is provided in association with the joint members. The module for restricting rotation includes modules for generating friction torque, modules for sucking, stopper modules for restricting a rotation angle of the first hinge shaft and the second hinge shaft, and a module for synchronously rotating hinge shafts.

A switch includes a base, a support terminal assembled in the base, a movable contact piece made of a belt-like electroconductive material bent into a substantial J-shape in section, a plunger vertically movably accommodated in an internal space, and a coil spring turnably supported by the plunger. The movable contact piece includes a movable contact provided in one end portion thereof. An intermediate portion of the movable contact piece is turnably supported by a turning support portion of the support terminal. The internal space is formed by fitting a housing in the base. The plunger is slid while vertically moved press-contact one end portion of the coil spring against the other end edge portion of the movable contact piece such that the movable contact piece is reversed to bring the movable contact into contact with a fixed contact or to separate the movable contact from the fixed contact.

A micro-electromechanical device has a substrate (10), a movable element, movable towards the substrate by electrostatic forces on electrodes, facing surfaces of the movable element and the substrate being shaped such that one or more venting channels (VC) are defined by the facing surfaces when they are in a closed position, configured to enable fluid between the facing surfaces to flow across the facing surfaces, to enter or exit the area between the facing surfaces. Such channels can enable fluid damping of the movement of the moveable element to be controlled. Increasing the flow entering or exiting the area between the facing surfaces, can reduce such damping, and hence increase speed of opening and closing of the device. The channels can connect to holes in the electrodes.

A mechanical prosthetic heart valve having a ring, multiple hinges, and multiple leaflets. The hinges are attached to the ring and are evenly spaced from one another along the inner circumference of the ring. Each leaflet is rotably attached to a hinge by an opening located in the center of the lower portion of the leaflets. The ring can include multiple protrusions located along the inner circumference of the ring. The protrusions of the ring limit the opening angle of the leaflets. By limiting the opening angle of the leaflets, wear and tear of the hinges and leaflets, as well as the probability of malfunction of the mechanical prosthetic heart valve are reduced. In addition, limiting the opening angle of the leaflets may increase the opening and closing speed of the leaflets, thus improving performance of the mechanical prosthetic heart valve when the patient is experiencing an elevated cardiac frequency.

The invention discloses an intelligent fire hydrant monitoring valve and solves the problem that the water pressure of a tap water pipeline network cannot be monitored in real time at present. The intelligent fire hydrant monitoring valve comprises a fire-hose quick connector, a water outlet flange, a wafer type butterfly valve and a fire hydrant connecting flange which are sequentially connected from top to bottom, wherein the fire-hose quick connector is in threaded connection with the water outlet flange; the fire hydrant connecting flange comprises a cylinder, a disk and a connecting pipe; the cylinder is of a hollow structure; the disk is arranged above the cylinder and is connected with the water outlet flange; the connecting pipe is arranged below the cylinder and is used for being connected with a fire hydrant; the cylinder, the disk and the connecting pipe are coaxial; a water pressure sensor which is used for detecting the water pressure in the cylinder is also arranged at the side edge of the cylinder. By the arrangement of the fire hydrant connecting flange, a water pressure detection environment is provided, and the water pressure can be detected in real time, so that the current water pressure situation can be clearly mastered, a fireman judges whether the current water pressure can meet the fire extinguishing requirement, and therefore a water using scheme is quickly adjusted.

The invention discloses a brake switch-off and switch-on controller of a high voltage alternating-current circuit breaker. The controller comprises an operating power source, a brake switch-on control interface circuit, a brake switch-off control interface circuit, a brake switch-on control operating part, a brake switch-off operating part, a safety brake switch-on circuit, a brake switch-on coil, a brake switch-off coil, a brake switch-on control outlet device and a brake switch-off control outlet device, wherein the brake switch-on operating part is connected with the brake switch-on control interface circuit, the brake switch-on control interface circuit is connected with the control end of the brake switch-on control outlet device, the brake switch-off operating part is connected with the brake switch-off control interface circuit, and the brake switch-off control interface circuit is connected with the control end of the brake switch-off control outlet device. The brake switch-off and switch-on controller of the high voltage alternating-current circuit breaker is simple in structure, reliable in operation and low in cost. The brake switch-off and switch-on controller of the high voltage alternating-current circuit breaker is high in brake switch-off and switch-on speed, the brake switch-off speed is smaller than or equal to 15 ms, the brake switch-on speed is smaller than or equal to 35 ms, and the brake switch-off time and the brake switch-on time of the circuit breaker are effectively shortened.

The invention discloses a breaking-closing coil control circuit of a long-stroke permanent magnetic mechanism. The breaking-closing coil control circuit solves the problems of great starting current, low breaking speed and great closing jumping and breaking rebounding of the existing permanent magnetic mechanism in a long stroke. A breaking-closing winding uses a multi-coil structure, so that the long-stroke movement of an iron core can be realized; the stroke requirements of an ultra-high-voltage or extra-high voltage circuit breaker can be met; according to speed feature requirements of the high-voltage circuit breaker in different stages of a moving process, different windings are respectively conducted; on one hand, the excitation current of a coil of the permanent magnetic mechanism, particularly the starting current is reduced, the starting electromagnetic force of the permanent magnetic mechanism is improved, and high acceleration is generated; on the other hand, the speed in a final breaking-closing stage is reduced through regulating winding current; the closing jumping and the breaking rebounding are reduced; the breaking-closing speed of a switch contact can be better controlled, so that a control system can be more easily realized, and the reliability is higher.

The invention relates to a circuit breaker and its arc extinguishing chamber, its arc contact assembly and arc contact transmission rod. The arc contact transmission rod includes a shift fork and an arc contact for driving the The rod body between the heads, the rod body is provided with a long drive slot for pushing and matching with the push post on the shift fork. The driving groove segment corresponding to the moving stroke has a chute segment inclined to the extending direction of the rod body so that the two ends of the driving groove segment are staggered in the extending direction of the rod body. The two ends of the driving groove section provided by the present invention are arranged staggered in the up and down direction, and the relative movement between the pushing boss and the driving long groove in the up and down direction can be used to effectively improve the moving speed of the arc contact assembly and shorten the The closing time shortens the insulation establishment time and improves the breaking capacity.

A large-flow type pneumatic shut-off directional valve comprises a valve seat, an upper valve body and a lower valve body. A feed inlet for allowing a liquid media to flow in is formed in one side of the upper valve body, and a discharge outlet for allowing the liquid media to flow out is formed in one side of the lower valve body. The valve seat, the upper valve body and the lower valve body are connected in sequence and communicate with one another. A valve rod penetrating through the upper valve body and extending into the lower valve body is arranged in the valve seat. The end, located in the lower valve body, of the valve rod is provided with a lower-end valve clack for sealing the discharge outlet. The end, facing the valve seat, of the lower-end valve clack is the obverse side, and the section, away from the valve seat, of the lower-end valve clack is the reverse side. The other end of the valve rod extends out of the valve seat and is provided with a pneumatic assembly for driving the valve rod to move. The lower-end valve clack is provided with a first filtering hole enabling the obverse side and the reverse side to communicate, and further provided with a filtering hole sealing device for controlling the first filtering hole to be through. The filtering hole sealing device comprises a rotary lower-end valve clack corresponding to the first filtering hole in position, and a locking mechanism for controlling the rotary lower-end valve clack to rotate.