124results about How to "Prevent misfiring" patented technology

The invention discloses a staple head assembly of a linear suturing and excising device. The staple head assembly comprises a staple cartridge rack, a staple anvil, a connecting pipe, and a knife pushing rod positioned in the connecting pipe, wherein the side face of the near end of the knife pushing rod is pivotally provided with a safety block, and a boss is correspondingly arranged on the staple cartridge rack or the connecting pipe; under the initial state, the front end face of the far end of the safety block is abutted against the boss and limits the movement of the knife pushing rod and the safety block; under the working state, the cocking surface of a cocking ejector rod is abutted against the rear end face of the near end of the safety block and generates acting force for driving the safety block to pivotally rotate so as to enable the front end face of the far end of the safety block to be separated from the boss for relieving safety. The staple head assembly has the beneficial effects that a safety mechanism positioned in the staple head assembly is provided, so that the conditions that the staple head assembly is mistakenly cocked when the staple head assembly is not completely mounted in place, and normal use of an instrument is influenced by forward moving of the knife pushing rod in the transportation process of the staple head assembly are prevented, the structure is simple and effective, and the staple head assembly is very practical.

A medical clip dispenser apparatus for the pinching of a medical clip or staple about a portion of a mammalian body tissue. The apparatus comprises an elongated support beam having a distal end with a stationary lower housing thereon, and a distally movable hollow cinch slidably disposed on the lower housing. The cinch has a portion of a pair of closable jaws squeezably arranged therewithin. An elongated pusher has a generally cross-shaped pusher member on a distal end thereof in slidable engagement with the jaws, to keep the jaws apart from one another after a new clip has been pushed into position between the jaws.

The invention provides a circular tube-type anastomat. The circular tube-type anastomat comprises a shell, a nail anvil pull rod, a nail push rod, a knob and a percussion handle, wherein the nail anvil pull rod is accommodated in the shell; the nail push rod is sheathed onto the nail anvil pull rod; the knob is connected with the near end of the shell so as to control the nail anvil pull rod to move; and the percussion handle is pivotally connected onto the shell and is abutted with the near end of the nail push rod. The circular tube-type anastomat also comprises a safety mechanism movably positioned in the shell so as to limit the movement of the percussion handle. The safety mechanism comprises a locking piece, a safety block and a torsional spring, wherein the locking piece can be abutted with or separated from the percussion handle; the safety block is relatively arranged on the near end of the locking piece; and the torsional spring is connected with the locking piece and the safety block. The nail anvil pull rod is provided with a stay rod pin, and the safety block is provided with a shifting chute matched with the stay rod pin. When the knob is rotated to a percussion position, the locking piece is separated from the percussion handle. According to the circular tube-type anastomat provided by the invention, mistake percussion can be effectively prevented from occurring, so that surgical procedures are simpler and more convenient.

The invention relates to a household gas stove, in particular to a household gas stove burner, which comprises a burner main body and an ejection pipe which is connected with the burner main body. The burner main body comprises at least one outer ring main flame burner and one inner ring flame burner. The household gas stove burner is characterized in that the household gas stove burner additionally comprises an inner ring small flame burner which can ignite the inner ring flame burner and an inner ring small flame burner ejection pipe which is connected with the inner ring small flame burner. The household gas stove burner provided by the invention realizes effects of reliable and stable flame, extremely small flame (50-500W), effective maintenance, quick ignition and linked flame transfer, and can prevent flame floating and flame blow-off from occurring.

A vehicle lighting unit can prevent the erroneous emission of laser light from a lens member through its light emission surface to the outside even when a wavelength converting member is dislocated. The vehicle lighting unit can include a laser light source, the wavelength converting member configured to receive the laser light and wavelength-convert at least part of the laser light, and the lens member including a light incident surface on which light from the wavelength converting member or the laser light is incident, a first reflecting surface configured to totally reflect the light from the light incident surface, and a light exiting surface through which the light from the first reflecting surface can exit. The lens member can further include a total-reflection prevention structure at the first reflecting surface, configured to prevent the laser light entering the lens member from being totally reflected by the first reflecting surface.

A semiconductor device for ignition performing a current control function and a self shut down function can include a pulse generating circuit, a switching circuit, and a current source circuit, the three circuits together generating a pulse current that discharges a capacitor in the self shut down process. This construction can serve to suppress oscillation of a collector current Ic of the output stage IGBT in the operating processes of the current control circuit and the self shut down circuit, thus preventing or minimizing the likelihood of the ignition plug from erroneous ignition. In addition, the discharge of the capacitor in a pulsed mode can allow for down-sizing of the capacitor, which can contribute to minimization of the semiconductor device.

Aspects of the invention are directed to an ignition semiconductor device that includes an output IGBT for ON-OFF control of a primary current in an ignition coil and a current control circuit for controlling a magnitude of the primary current in the ignition coil, the current control circuit being operated by the voltage between the gate terminal and the emitter terminal. The current control circuit can include a sense IGBT, a sense resistance, a gate resistance, a reference voltage, level shift circuits, a self shut down signal generator, a self shut down circuit, an operational amplifier, a MOSFET, a gate voltage control circuit , a pulse generation circuit, and a switching circuit. The self shut down signal generator, on detecting an abnormal state, can deliver a self shut down signal and the pulse generation circuit can generate a pulse signal to short-circuit the switching circuit.

A drive circuit for driving a semiconductor element is equipped with: a first switch connected to a positive side of a DC power supply; a second switch connected to the other terminal of the first switch and to a negative side of the DC power supply; a third switch connected to the positive side of the DC power supply; a fourth switch connected to the other terminal of the third switch; a fifth switch connected to the other terminal of the fourth switch and to the negative side of the DC power supply; and a capacitor connected to the other terminal of the first switch and to the other terminal of the fourth switch. A gate of the semiconductor element is connected to the other terminal of said third switch; and a source of the semiconductor element is connected to the negative side of the DC power supply.

A combustor fire cover comprises an annular inner ring wall face, an annular outer ring wall face and a cover body located above the inner ring wall face and the outer ring wall face, wherein the inner ring wall face and the outer ring wall face are concentrically arranged in a spaced mode. The outer ring wall face is provided with fire holes and small fire holes, wherein the fire holes are evenly distributed in the circumferential direction of the outer ring wall face at intervals and penetrate through the outer ring wall face in the thickness direction, and the small fire holes and the fire holes are arranged in a vertical spaced mode. A partition plate is arranged between the inner ring wall face and the outer ring wall face, the space defined by the inner ring wall face, the outer ring wall face and the cover body is partitioned into a first cavity and a second cavity, the fire holes are located in the first cavity, the small fire holes are located in the second cavity, the partition plate is provided with holes to enable the first cavity and the second cavity to be communicated, the first cavity is communicated with an external gas mixing room, and fuel gas enters the second cavity from the first cavity through the holes. By means of the combustor fire cover, extinction caused when big fire and small fire are switched or detonation caused when fire is extinguished or the like can be prevented, the phenomena of floating flames and blow-off of the fire holes of the fire cover can be prevented, and the combustor fire cover is of a detachable structure and is convenient to clean.

The invention provides a nail head component, which comprises a nail cartridge frame, a nail anvil, a triggering block, a connecting tube, a knife pushing rod and a safety mechanism, wherein a nail cartridge is arranged on the nail cartridge frame in a detachable mode; the nail anvil can be closed in a pivotal mode relative to the nail cartridge; the triggering block is movably arranged in the nail cartridge; the far end of the connecting tube is connected to the near end of the nail cartridge frame; the knife pushing rod is movably arranged in the connecting tube; a first clamping part is arranged at the near end of the knife pushing rod; a knife is arranged at the far end of the knife pushing rod, and the knife, pushed by the knife pushing rod, can push the triggering block to move; the safety mechanism comprises a pressing block and a pushing block; a second clamping part is arranged on the pressing block, and the pressing block, relative to the connecting tube, can rotate between a first position and a second position; when the pressing block is on the first position, the knife pushing rod is under a locked state, and when the pressing block rotates to the second position, the knife pushing rod is under an unlocked state; the pushing block, relative to the connecting tube, can move between a third position and a fourth position in a longitudinal direction; and the pressing block is pushed to rotate from the first position to the second position when the pushing blocks moves from the third position to the fourth position.

The pne micronatic riveter without idle operation includes one riveter body with one striker and one striker starting mechanism, one rivet nozzle below the striker, and one rivet cartridge beside the rivet nozzle. It has also one sliding sleeve below the rivet nozzle, one regulating nut shaft connected to the sliding sleeve, one crank lever interlinking with the striker starting mechanism, one hook in the lower end of the crank lever, and one rivet pressing block with reset mechanism. The present invention can avoid error jetting and has no idle operation.

The ignition apparatus includes an electronic control unit and an igniter. The igniter detects ions resulting from ignition, and sends an ion current output signal to the electronic control unit. The igniter has a waveform shaping circuit and an ion current detecting/outputting circuit. The waveform shaping circuit is adapted such that a voltage at an input terminal thereof becomes higher than a predetermined reference voltage to turn the switching element ON when the ignition signal is caused to flow through an electric load. The ion current detecting/outputting circuit has an output terminal which is connected to the input terminal and outputs therefrom an ion current output signal obtained as a result of conversion of an ion current, and is adjusted such that the voltage at the input terminal at the time when the ion current output signal is outputted to the electronic control unit becomes lower than the reference voltage.

The invention relates to a clamping insurance device for a surgical suture device. The clamping insurance device is a surgical suture device supporting device which applies a linear row on an intra-abdominal tissue and is used for cutting tissues in the linear row suture device simultaneously. The clamping insurance device comprises a movable handle, a movable handle tension spring, an insurance button, a triggering rod, a firing insurance block, a drive bar, a firing positioning rod, a drive bar insurance block, a drive bar insurance drive block, a positioning guide support tube, a clamping component, a blocking ring, a clamping pressure spring, a drive ring, an upper connecting strip, a lower connecting strip, a connecting piece and a locking ring; the movable handle is mounted on a fixed handle, and the movable handle tension spring is arranged in the middle and is connected with the movable handle and the fixed handle; the triggering rod is mounted in a triggering rod mounting groove, and a triggering rod pressure spring is mounted at the lower part of the triggering rod; the drive bar is mounted at the upper part of the fixed handle, and the front end of the drive bar is inserted in the left clamping block and the right clamping block; the positioning guide support tube is mounted in an outer sleeve, and the rear end is mounted in the left clamping block and the right clamping block and is connected with the fixed handle.

The invention discloses a multi-function glass knapper. The multi-function glass knapper comprises first and second gun bodies, a firing pin and a rotating ammunition feed disc, wherein the first gun body is provided with a first through hole and a crushing pin, and a first platform shoulder in the first gun body is provided with a second rubber ring; the rotating ammunition feed disc is supported on two installing plates through a shaft and is provided with multiple blank ammunition installing holes which correspond to the positions of blank ammunition through holes formed in the two installing plates; the second gun body is internally provided with a firing pin through hole and is provided with a trigger, a triggering end of the trigger is positioned in the firing pin through hole, the firing pin comprises a trigger shaft and a firing pin rod, and the firing pin rod is integrally provided with a spring flange; the joint of the trigger shaft and the firing pin rod can form a second platform shoulder, the other end of the firing pin rod is fixedly provided with a firing pin disc which is provided with two inserting plates; the right end of the second gun body is provided with a protecting cover, and the end surface of a protecting pillar of the inserting plate of the protecting cover is provided with two protecting grooves and two deblocking grooves; the depths of the deblocking grooves are greater than the depths of the insurance grooves, and a firing pin spring is arranged on the firing pin rod. The multi-function glass knapper can not generate the damage to a human body and is safe and reliable.

The invention belongs to the field of fuel cells, and particularly discloses a combustor for a medium-high temperature solid fuel cell and an application thereof. An air inlet and a fuel inlet are arranged at an inlet end of a static mixing cavity in the combustor and are used for mixing air and fuel to obtain mixed gas; a shunting orifice plate is connected with an outlet end of the static mixingcavity to provide a buffer area for the mixed gas and shunt the mixed gas; a metal mesh structure is connected with the shunting orifice plate, so that the phenomena of tempering and flamelifting areprevented; a combustion chamber is arranged on the outer side of the static mixing cavity and provides a space for mixed gas combustion; and a pulse igniter is arranged above the metal mesh structureand used for igniting the mixed gas. According to the combustor, the shunting orifice plate is utilized to provide the buffer area for the high-flow-rate mixed gas, meanwhile, flame generated by combustion is divided into a plurality of fine flame flows by utilizing the metal mesh structure, and stable gas flow and temperature gradient are formed, so that the phenomena of the tempering and flamelifting are prevented.

A biopsy device comprises a needle tubing, a needle tubing seat, a handle, a handle cover, a safety device, a needle core and a triggering switch. The handle is provided with a slideway. The slideway is provided with a positioning clamp. The needle tubing seat is slidably limited on the slideway. A spring guide column is fixed at the top of the handle. A spring is mounted between the spring guide column and the needle tubing seat. The needle core penetrates the spring guide column, the spring, the needle tubing seat and the needle tubing. The triggering switch is fixed at the top end of the needle core. A triggering column parallel with the needle core is fixed at the bottom of the triggering switch. A triggering head is disposed corresponding to the positioning clamp at the back of the slideway. The safety device is disposed on the triggering switch which comprises a safety column and a triggering button. The safety column can be abutted against the bottom of the triggering switch and the top of the handle and used for stopping the triggering head from being triggered to release the positioning clamp. The triggering button matched with the safety column is movably fixed at the bottom of the triggering switch and used for controlling the safety column to be abutted against or leave the bottom of the triggering switch and the top of the handle. By the biopsy device, accidental triggering during sampling can be avoided.

A squib includes a cup body and a closure plug for holding a plurality of electrode pins insulated from one another and closing the opening of the cup body, and further includes, in the cup body, ignition powder and an ASIC component formed by molding a resin around electric circuits including an ASIC and a capacitor, a heating element connected to the ASIC and located at the top of the resin molding of the ASIC component, and connection electrodes located at the bottom of the resin molding for connecting the ASIC to the electrode pins. The squib includes a cylindrical metal fixture having at the center of its top an opening of a size sufficient to expose the heating element and being fixed to the closure plug in a state covering the top circumferential periphery and side surface of the ASIC component and pushing the connection electrode of the ASIC component against the electrode pins. With the squib thus constructed, electric current can be reliably supplied to the electric circuits incorporated in the squib, and upon operation of the squib the resin molding and its broken pieces are effectively prevented from flying in all directions.

The invention relates to a triggering safety mechanism of a disposable linear anastomat, which belongs to a matched triggering safety mechanism of the disposable linear anastomat. The disposable linear anastomat is particularly applicable to stump and cut sealing in alimentary tract and gastroenteritic operation. The triggering safety mechanism comprises a positioning rod, a fixed positioning rod slide block, a safety slide plate and a safety block, wherein slide grooves are arranged in the fixed positioning rod slide block, the positioning rod is arranged and inserted in a groove of the fixed positioning rod slide block, one end of the safety slide plate is arranged in a clamp groove at the lower part of the fixed positioning rod slide block, the other end of the safety slide plate is provided with the safety block, the safety block is arranged in the slide grooves of the safety block arranged at the front end of a fixed handle, the fixed positioning rod slide block is sheathed and arranged at the middle part of an upper clamp plate and a lower clamp plate of a nail propping seat through the slide grooves. The slide grooves of the safety block are two to three, and the slide grooves of the safety slide plate are arranged at the front end part of the fixed handle. Because the disposable linear anastomat is provided with the triggering safety mechanism, the error triggering in the operation process can be avoided.