30results about How to "Reduce firing force" patented technology

The invention discloses a nail bin assembly which comprises a nail bin, a nail bin hole and a nail-pushing slice, wherein the nail bin hole is thoroughly arranged on the surface of the nail bin, the nail-pushing slice is arranged in the nail bin hole and can slide relative to the nail bin hole, the transversal surfaces of the nail bin hole and the nail-pushing slice are respectively provided with a pair of long edges, and the distance between the long edges of the nail bin hole is greater than that between the long edges of the nail-pushing slice. The invention has the main beneficial effects that because the nail bin hole and the nail-pushing slice are in point contact, the friction between the nail bin hole and the nail-pushing slice is small, so that the percussive force of the whole nail bin assembly is relatively small.

The present disclosure is directed to a surgical stapling device (10) for performing circular anastomoses. The surgical stapling device includes a handle portion (12), an elongated body portion (14) and a head portion (16) including an anvil assembly (30) and a shell assembly (31). The handle portion (12) includes a rotatable approximation knob (22) for approximating the anvil and shell assemblies (30,31) and a firing trigger (20) for actuating a firing mechanism for ejecting staples positioned within the shell assembly (31). The firing trigger (20) forms one link of a two bar linkage provided to actuate the firing mechanism. The anvil assembly (30) includes a tiltable anvil which will tilt automatically after firing of the device and unapproximating the anvil and shell assemblies (30,31). The head portion (16) also includes a retractable trocar assembly (240) which is slidably positioned within an anvil retainer (38) and is automatically advanced and retracted upon attachment and detachment of the anvil assembly (30) onto the anvil retainer (38). A lockout tube (270) is provided and is positioned about the anvil retainer (38) for releasably engaging an anvil assembly (30). The lockout tube (270) prevents inadvertent detachment of the anvil assembly (30) from the anvil retainer (38). The surgical stapling device (10) also includes a firing lockout assembly which prevents actuation of the firing trigger (20) until an anvil has been attached to the device and the anvil (129) has been approximated. A tactile indication mechanism is also provided for notifying a surgeon that the device has been fired and for notifying a surgeon that the anvil head has been unapproximated a distance sufficient to permit the anvil head to tilt.

The invention relates to a stitching instrument with a cutter, which comprises a support plate, a nail abutting seat, a nail bin, a cutter component, a propelling mechanism and a traction mechanism. The propelling mechanism and the traction mechanism are mounted on the support plate; the propelling mechanism is connected with the nail bin; the cutter component is mounted in an inner cavity of the nail bin and comprises a cutter slider and a cutter connecting steel wire rope; and the traction mechanism comprises a traction steel wire rope which is connected with a free end of the cutter connecting steel wire rope. The stitching instrument with the cutter is a linear type cutting stitching instrument with a sliding cutter, is applicable to the nail bin with the small longitudinal space, and is simple in structure, convenient in assembly and safe in use, triggering force of the stitching instrument is low, stitching nails are formed well, stitching and cutting actions are simultaneously realized by the effect of tension of the traction mechanism, the cutting direction of the stitching instrument is parallel to the direction of a stitching thread, and accordingly the stitching instrument is more applicable to popularization and application.

The invention relates to an intracavitary straight-cutting push knife mechanism. The intracavitary straight-cutting push knife mechanism is provided with a first cutting blade and a second cutting blade. One of the first cutting blade and the second cutting blade obliquely and downwards extends from front to back, and the other of the first cutting blade and the second cutting blade obliquely and upwards extends from front to back. The rear portion of the first cutting blade and the rear portion of the second cutting blade are intersected to form a V-shaped cutting edge. The intracavitary straight-cutting push knife mechanism uses the V-shaped cutting edge to conduct clipping-type cutting on the tissue. The V-shaped cutting edge structure can make the tissue closed up in the tissue cutting process. The tissue which is not cut off by the front cutting edge is pushed by the first cutting blade 101 and the second cutting blade 102 towards the root portion of the V-shaped cutting edge. Due to the fact that the tissue is already cut open by the first cutting blade 101 and the second cutting blade 102 in advance, the tissue can be easily cut off at the root portion of the V-shaped cutting edge. The percussion force required by forward cutting of the intracavitary straight-cutting push knife mechanism is decreased by adopting the structure, convenience is brought to operation performed by a doctor, and further the operation risk is reduced.

The invention relates to a stitching instrument with a cutter and a cutter component of the stitching instrument with the cutter. The cutter component comprises a cutter slider, a cutter connecting steel wire rope, guiding plates and a fixing block; the cutter slider is provided with the cutter, a triggering plate, a positioning plate, positioning pins, a steel wire rope mounting block and a mounting hole; one end of the cutter connecting steel wire rope penetrates through the mounting hole and is fixed; each guiding plate is provided with a guiding groove, the guiding grooves correspond to the positioning pins, and the cutter slider is slidably mounted between the two guiding plates via the positioning pins; and the fixing block is mounted below the guiding plates and the cutter slider. The cutter component of the stitching instrument with the cutter is mounted in an inner cavity of a nail bin, and the cutter connecting steel wire rope of the cutter component is connected with a traction mechanism. The stitching instrument with the cutter is applicable to the nail bin with the small longitudinal space, and is simple in structure, convenient in assembly and safe in use. The triggering force of the stitching instrument is low, stitching nails are formed well, stitching and cutting actions are simultaneously realized by the effect of tension of the traction mechanism, the cutting direction of the stitching instrument is parallel to the direction of a stitching thread, and accordingly the stitching instrument is more applicable to popularization and application.

The invention discloses a disposable flat pad device in an endoscope cutting anastomat nail bin assembly. The device comprises a rubber tube shell assembled by a rubber tube S and a rubber tube L, therubber tube shell is internally provided with a basic block, a push cutter rod assembly and a flat pad device body, and the push cutter rod assembly is driven by the basic block to move forth and back in the axial direction of the rubber tube shell; the flat pad device body is composed of a plurality of flat pads symmetrically arranged at the two sides of the push cutter rod assembly, each flat pad is made of an elastic material and provided with an arc back part, a first hook pin, a second hook pin and a third hook pin, each first hook pin and the corresponding second hook pin are located atthe two ends of the corresponding back part and extend in the direction away from the corresponding back part, each third hook pin is located between the corresponding first and second hook pins, andthe first hook pins, the second hook pins and the third hook pins are clamped with through holes correspondingly formed in the rubber tube S respectively. Under the condition that when an existing anastomat is in use, the push cutter rod assembly is deformed due to swinging of the end part, and the flat pad device provides a deformed limiting channel, so that the swinging and firing process of the instrument is smoother.

The invention relates to a pushing cutter rod bending deformation compensation mechanism suitable for a stapler. The pushing cutter rod bending deformation compensation mechanism comprises a pushing cutter rod assembly, a hose part, a connecting part, a base block and a swing block, wherein the connecting part is connected to the left end of the pushing cutter rod assembly, the hose part slidablysleeves the base block to push the pushing cutter rod assembly to move in the axial direction of the hose part, and the swing block is composed of a mounting portion and a compensation function portion; the mounting portion is freely and rotatably arranged on the base block in an inserted mode, an inserting slot is formed in the pushing cutter rod assembly for accommodating the compensation function portion; and thus, when the head swing motion of a jaw occurs, the connecting part rotates correspondingly, at the same time, internal bending elastic deformation of the pushing cutter rod occurs,so that the swing block is driven to perform an adaptive rotational motion about the central axis of the swing block, the situation that the pushing cutter rod assembly abuts against tightly relativeto the base block is avoided, smooth progress of the jaw swing movement is ensured, and the firing force required by an instrument is reduced.

The invention discloses a nail bin assembly of a linear anastomat. Three rows of upper nail cavities and three rows of lower nail cavities are distributed on the upper half portion and the lower halfportion of a nail bin in a staggered mode. Therefore, the maximum force borne by nail pushing particles inserted into the nail cavities in the nail forming process is mutually staggered; the first nail pushing particles are inserted into the first row of nail cavities and the second row of nail cavities at the same time; the second nail pushing particles are inserted into the third row of nail cavities; the gradient of the first inclined surface used for pushing the first nail pushing particles is smaller than that of the second inclined surface used for pushing the second nail pushing particles; therefore, under the condition of generating the same upward thrust, the thrust can be ensured to be uniform; the forward pushing force of the nail pushing block is small; besides, the highest points of the first inclined surface and the second inclined surface on the nail pushing block are staggered; the time for the first nail pushing particle and the second nail pushing particle to reach the highest point can be staggered, the situation that three rows of suturing nails reach the highest point at the same time is avoided, and therefore thrust needed by the nail pushing block is furtherreduced, the whole suturing process is more stable, surgical fatigue of doctors is relieved, and the suturing effect is optimized.

The invention discloses a direction-changeable clamp. The clamp comprises a clamping part, a first fixing seat and a second fixing seat, wherein the clamping part comprises a horizontal fixing rod anda back push rod and moving teeth arranged at the upper part and the lower part of the horizontal fixing rod, two ends of the horizontal fixing rod are rotationally fixed between the first fixing seatand the second fixing seat, two elastic pieces which are symmetrically arranged on two sides of the clamping part are also arranged between the first fixing seat and the second fixing seat, elastic ends of the two elastic pieces make contact with the back push rod, when the moving teeth changes direction to swing, the back push rod realizes resetting and clamping actions of the moving teeth underthe elastic action of elastic pieces on two sides of the back push rod. The invention further discloses an endoscope stapler comprising the clamp. The clamp is arranged above an initial clamping groove of a push rack, and an elastic touch ball is arranged at the tail end of the push rack. By improvement of the clamp, the clamping part of the clamp can realize the effect of reducing percussion force and resetting force of an instrument with change of moving direction of the push rack. The elastic touch ball is also arranged to increase resetting opening angles, so that resetting is more precise and reliable.

According to the end executor and the linear anastomat, by arranging the nail pushing assembly and the percussion assembly, when the end executor is closed, the percussion assembly drives the nail pushing assembly to move, so that suturing nails in the nail bin are sequentially percussed, and the problems of large heads, small heads, dovetail and the like are solved. Therefore, the end executor and the linear anastomat adopt a sequential nailing mode, the required percussion force can be saved, the nail anvil is prevented from deforming, and a good nailing effect, a good suturing effect and good surgical safety are achieved.