70results about How to "Realize security protection function" patented technology

The invention discloses an electromagnetic wedge-shaped bidirectional rope gripper which solves the problems that the rope gripper of the prior art cannot automatically reset after an action or stop the unplanned movement of an elevator. The electromagnetic wedge-shaped bidirectional rope gripper comprises a box body, a wedge-shaped guide body and wedge components; and the technical point is that: the wedge components are movably assembled on a slide rail of the wedge-shaped guide body through a sliding guide frame; the end parts of the two wedge components are assembled on a linkage support seat which is connected with the core of an electromagnet at the outer side of the box body, thus forming a group of unidirectional gripping devices; the upper and lower groups of symmetrically-arranged unidirectional gripping devices form a bidirectional stop gripping mechanism; and an ejector rod of an ascending outage automatic locker is supported at the bottom of the wedge components of the upper groups of unidirectional gripping devices. The electromagnetic wedge-shaped bidirectional rope gripper is reasonably designed, has a compact structure and a small volume, saves the installation space, is convenient to install, realizes adjustable braking force and automatic reset, ensures steady and reliable braking, is used for gripping the elevator dragging wire rope when the elevator is in an ascending or descending overspeed state, and can meet the standard requirement on protection of preventing unplanned movement.

The switch is provided with a keyway, in which a first spring, a movable contact piece, a second spring and a key are sequentially installed from bottom to top, and two sides of the keyway are provided with an incoming contact piece mounting groove and an outgoing contact piece mounting groove, and the incoming contact piece and the outgoing contact piece are respectively installed in the corresponding groove. As that first spring and the second spring are compress by pressing the key, the movable contact piece is moved downward, so that the incoming contact piece and the outgoing contact piece are connected, and the circuit is connected; Release the key, the first spring bounces and the moving contact moves up, thereby disconnecting the circuit. The switch of the invention is further provided with a plug spring piece and a terminal on the side wall of the switch to realize the modular use of the switch.

The invention discloses a high-temperature and high-pressure safety valve and belongs to the technical field of safety valves. Existing high-temperature and high-pressure safety valves bear low temperatures and are relatively low in precision and poor in reliability. The high-temperature and high-pressure safety valve comprises a valve body, a valve deck, a valve element, springs, a guide sleeve, a sealing ring, a heat-insulation pad, an adjustment rod and a locking nut, wherein the valve body and the valve deck are connected through a flange. A safety protection function in a pressure system is achieved, and risks caused by overpressure of the system are prevented. The high-temperature and high-pressure safety valve is simple in structure, fast to assemble, flexible in action and high in control precision and can be widely applied to the high-temperature and high-pressure system. According to the high-temperature and high-pressure safety valve, the safety protection function in the pressure system is achieved, and the reliability is high.

The invention discloses a terminal cash box equipped with a protection structure, comprising a cash box mounting frame, a cash box, a cash box cover plate, and a protection structure. The top end of the cash box is provided with a slot. The cash box and the cash box mounting frame are in sliding connection, and the cash box and the cash box cover plate are in sliding connection. The protection structure is mounted on the cash box mounting frame, and includes an upper limiting plate, a lower limiting plate, a square clamping pin, and a limiting pin. The upper limiting plate and the lower limiting plate are provided with square holes in positions corresponding to each other up and down. The square clamping pin sequentially passes through the square hole of the upper limiting plate and the square hole of the lower limiting plate. The front side of the bottom end of the square clamping pin is provided with a chamfer, and the lower end of the square clamping pin is on the moving trajectory of the cash box. In the process in which the cash box slides into the cash box mounting frame, the square clamping pin can be jacked up and fall into the slot. In the process in which the cash box cover plate slides in and covers the cash box, the square clamping pin is ejected out of the slot. By adopting the structure, the safety of the cash box in the process of loading can be well guaranteed.

The invention provides a zipper accessory comprising an upper connector and a lower connector, wherein the upper connector comprises two buttons and two cylinders which are respectively connected with two buttons; the lower connector comprises an adapter ring, an elastic opening and closing device and a hanger, wherein the adapter ring is connected to the upper connector, the elastic opening and closing device is connected with the adapter ring, and the hanger is connected with the elastic opening and closing device. When the zipper accessory of the invention is applied to trousers, the zipper accessory has the mandatory function to avoid embarrassment; when being applied to mobilephone bags, wallets, satchels, luggage and field camping tents, the zipper accessory can realize the function of safety precaution; when being applied to satchels and luggage, the zipper accessory can serve as the ornament to improve the aesthetic degree of the product. In addition, because of the detachability of the zipper accessory, the zipper accessory can perform general effect so as to improve applicability of the invention.