37results about How to "Reduce the risk of accidental injury" patented technology

The invention relates to a method for preparing important midbody (1R,2S)-2-(3,4-difluorinated phenyl) cyclopropylamine of ticagrelor. The method mainly comprises the following steps: performing cyclopropane reaction on camphor sulfonium ylide I and acrylonitrile, synthesizing (1R, 2S)-2-(3,4-difluorinated phenyl) cyclopropyl nitrile II in a stereoselectivity manner, and further performing hydrolysis and holfman degradation reaction, thereby obtaining a target product IV. The method has the characteristics of cheap initial materials, high yield, good stereoselectivity, high enantioselectivity, low production cost and the like, and has important significance in industrial production.

The invention discloses a protection system for preventing an elevator from accidentally moving in an elevator stop and door open state. The protection system comprises a monitoring circuit, wherein the monitoring circuit comprises an input signal circuit, a central processing unit (CPU) and a relay output circuit, wherein four ports (11, 12, 13 and 14) of the input signal circuit respectively input a first door area switching signal, a second door area switching signal, an elevator stop signal and an elevator door open state signal; and after the signals are processed by the CPU, the relay output circuit outputs the signals and controls an electromagnet on steel wire rope brake and a safety circuit on an elevator control system. By the protection system for preventing the elevator from accidentally moving in the elevator stop and door open state, a safety protection measure can be provided when an accidental moving safety accident of the elevator occurs, so that the operating safety of the elevator is improved; and therefore, the accidental injury risk of the elevator on people or goods is reduced.

The invention provides a single laparoscope auxiliary operation device. The single laparoscope auxiliary operation device comprises a laparoscope, the two universal rotating mechanisms are arranged on the laparoscope, each universal rotating mechanism comprises a ball sleeve and a sleeve plate, the ball sleeves are arranged on the laparoscope in a sliding and sleeving mode, the sleeve plates are arranged in the middles of the ball sleeves in a sleeving mode, and the ball sleeves can rotate on the sleeve plates in a universal mode; the direction control mechanism controls the sleeve plate far away from the laparoscope lens to move on the plane; the moving mechanism controls the laparoscope to slide in the ball sleeve; the supporting mechanism is used for supporting the direction control mechanism; one end of the connecting frame is fixedly connected with the sleeve plate close to the laparoscope lens, and the other end of the connecting frame is fixedly connected with the supporting mechanism; and the pedal controller is connected with the direction control mechanism and the moving mechanism and controls the direction control mechanism and the moving mechanism to act. According to the laparoscope, a surgeon can control the movement of the lens of the laparoscope through the pedal controller to obtain a required operation picture, and the laparoscope and instruments of the surgeon can be effectively prevented from fighting with each other.

The invention discloses an elevator safety device. When the braking force increases due to reasons such as a decrease in speed, and the braking force exceeds a set value, the first elastic body can be moved backward through a feedback device, thereby reducing the impact on the braking body. The pressure of the guide rail can automatically control the size of the braking force to generate a suitable braking force. The braking force can be continuously adjusted within a large range. Even if the friction coefficient increases due to the decrease of the speed during the braking process, the braking force can still be automatically adjusted. Keep it at the specified value to keep the braking deceleration roughly constant, reduce the impact on passengers, reduce the risk of accidental injury to passengers, greatly reduce the maximum force on the elevator car components, and avoid damage to the car and counterweight components. The elevator safety device has a compact and simple structure, can continuously adjust the braking force within a wide range, automatically maintain the braking force at a specified value, and keep the braking deceleration roughly constant. The invention also discloses an elevator comprising the elevator safety device.

The invention discloses four elevator safety devices. When a lifting body descends in a speed over a specified speed due to an accident, a brake body is pressed on a guide rail, braking force is generated by relative sliding of the brake body and the guide rail, so that the lifting body is decelerated until stopping; when the braking force is increased due to the decrease of the speed and the like, positive pressure can be automatically controlled, when the braking force exceeds a specified value, the pressure of an elastic body is transmitted to a frame, and the braking force is continuouslyadjusted within a larger range; and in the braking process, when a friction coefficient increases due to the decrease of the speed, the braking force can still be automatically kept at the specified value, so that the braking deceleration speed is generally kept constant, the impact on passengers is reduced, and the risk of the accidental injury to the passengers is reduced.

The invention provides a motor quick repair wire removal tool. A 120-degree equilateral triangle arrangement is formed by three brackets. The bottoms of the three brackets are fixed at the upper part of a motor shell. The top ends of the three brackets are fixed to a movable round block which is internally provided with a drill. Three groove iron are fixed to the bottom of the drill through connection blocks. The grooves of the groove iron are internally provided with saw blades. A hand drill is used to drive the drill to rotate in high speed, the centrifugal principle is used to throw the saw blades out, and a copper wire can be conveniently and rapidly cut. According to the motor quick repair wire removal tool, the hand drill is used to drive the drill to rotate, the saw blades installed at the bottom of the drill rotates too, and the copper wire in the motor shell is cut, the copper wire is conveniently drawn out from behind, time and labor are saved, the tool is convenient and rapid, and the risk of hand damage in cutting a copper wire by using a chisel is reduced.

The invention provides a venipuncture needle, comprising a catheter, a needle, a needle seat, a needle handle, and a needle withdrawal assembly located on the needle handle. Advancing the catheter into the proper position in the patient's vein increases the success rate of the needle. The needle withdrawal component provided by the venipuncture needle has a simple structure and proper arrangement of functions for use, which not only improves the puncture success rate of the puncture needle, but also effectively protects the medical staff from accidentally stabbing the puncture needle after use.

The invention discloses an infant walk learning insole which comprises an insole body. The insole body sequentially comprises an insole half sole, an insole core, an insole waistline and an insole heel piece from the front end to the rear end of the insole body, a half sole anti-skid pad is arranged at the lower side of the rear end of the insole half sole, a core damping pad is arranged at the lower side of the insole core, a foot arch supporting pad is arranged at the lower side of the middle of the insole waistline, and a heel piece damping pad is arranged at the lower side of the middle ofthe insole heel piece; the insole body sequentially comprises a first nanometer bamboo charcoal fiber layer, a first micropore polyurethane foaming layer, a second micropore polyurethane foaming layer, a third micropore polyurethane foaming layer and a second nanometer bamboo charcoal fiber layer from top to bottom. The insole is good in damping foot protecting effect, good in skid resistance andcapable of preventing ankle injuries and supporting the foot arch, and can promote blood circulation, enhance resistance and relieve infant foot fatigue.

The invention discloses a water blocking cap press-mounting assistive tool which comprises an assistive tool press head. The assistive tool press head is provided with a shaft body, a front end and a tail end. The front end is a stepped shaft. A groove is formed in the top face of the front-most end of the stepped shaft, is concave in the axial direction of the assistive tool press head, and is internally provided with a magnet. The tail end is provided with a knocking cap which is provided with a knocking end face and used for being knocked. A water blocking cap is attracted by the magnet in the groove and prevented from falling off in the mounting process, the front end is the stepped shaft to ensure that the end face of the water blocking cap is tightly attached to the assistive tool press head, and the consistency of the mounting depth can be ensured through contact of the stepped face of the stepped shaft and a to-be-mounted face.

The invention relates to a method for preparing important midbody (1R,2S)-2-(3,4-difluorinated phenyl) cyclopropylamine of ticagrelor. The method mainly comprises the following steps: performing cyclopropane reaction on camphor sulfonium ylide I and acrylonitrile, synthesizing (1R, 2S)-2-(3,4-difluorinated phenyl) cyclopropyl nitrile II in a stereoselectivity manner, and further performing hydrolysis and holfman degradation reaction, thereby obtaining a target product IV. The method has the characteristics of cheap initial materials, high yield, good stereoselectivity, high enantioselectivity, low production cost and the like, and has important significance in industrial production.