CN109984793B

CN109984793B - Firing equipment

Info

Publication number: CN109984793B
Application number: CN201711472884.0A
Authority: CN
Inventors: 陈望东; 丁水澄
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2024-04-12
Anticipated expiration: 2037-12-29
Also published as: CN109984793A

Abstract

The invention discloses firing equipment, which comprises a base frame; slidably disposing a first moving member; an operation member having an abutment point for applying a force tending to an acting position to the first moving member; a second moving member which is provided in a fixed state with respect to the base frame and is in contact with the operating member, the second moving member constituting a fulcrum of the operating member; a linkage member movably disposed between a first position and a second position with respect to the base frame, the first position corresponding to the fixed state, the second position for switching the second moving member to the moving state, the first moving member constituting a fulcrum of the operating member; and a reset mechanism for driving the linkage part to reset to the first position. The firing equipment can be subjected to experimental firing test before use, whether the functions of the parts such as the secondary firing prevention device and the like are normal and reliable is tested, and the firing equipment can be reset to an initial state through the reset mechanism after the test is completed.

Description

Firing equipment

Technical Field

The invention relates to the technical field of medical instruments, in particular to firing equipment.

Background

The anastomat is used in medicine to replace traditional manual suturing equipment, and the current clinically used anastomat has the advantages of quick suturing, simple and convenient operation, few side effects and operation complications and the like, and is favored and appreciated by clinical surgeons at home and abroad. The anastomat is divided into a circular tube type anastomat, a linear type stapler, a cavity mirror anastomat and the like according to functions and structures, wherein the circular tube type anastomat is used for anastomosis of various cavity passages, two layers of cavity passage tissues are sutured together by striking staples into the cavity passage tissues, and meanwhile, an internally-arranged annular knife cuts off redundant tissues to form a circular anastomotic stoma, so that anastomosis of the cavity passages is completed. The method is mainly applied to anastomosis of the digestive tracts such as esophagus, stomach, intestine and the like, and anastomosis after circumcision and hemorrhoid circular cutting.

In order to prevent the anastomat from being continuously fired twice during the operation, an anti-secondary firing device is arranged in the anastomat disclosed in Chinese patent document CN1785127A, wherein the circular tube type binding instrument for the surgery comprises a binding instrument body, a binding head, a firing mechanism, a transmission adjusting mechanism and a safety mechanism. The firing mechanism comprises a handle and a shell which are fixedly connected with each other, the handle and the shell are hinged on the binding instrument body, a stop block is arranged in the shell, and a lug is arranged on the handle; the transmission adjusting mechanism comprises a screw rod and an adjusting knob, the front end of the screw rod is connected with the binding head, and the rear end of the screw rod is in threaded connection with the adjusting knob.

The safety mechanism comprises a safety rod and a pull piece, wherein the bottom of the safety rod is provided with a safety block, the top of the safety rod is provided with a pointer, the position of the binding instrument body corresponding to the pointer is provided with an indication window, the middle part of the safety rod is hinged on the inner wall of the binding instrument body, the safety rod is connected with a reset spring, and the reset spring enables the safety rod to have a tendency of anticlockwise rotation around a hinge point of the safety rod; the front end of the pull tab is divided into three pieces, the front end of the middle piece is provided with a drag hook, two pieces on two sides are arranged in a guide groove on the inner wall surface of the binding instrument body in a sliding mode, the tail of the pull tab is fixedly sleeved on the screw rod, and the drag hook is hooked on a boss of the safety lever in an initial state.

In use, in an initial state, the safety block on the bottom of the safety rod is abutted against the stop block in the shell, so that the handle cannot be pressed down to fire and is in an automatic safety state; in operation, the screw rod is driven to move towards the direction of the adjusting knob by rotating the adjusting knob, the screw rod drives the pull tab connected with the screw rod to move, and the drag hook on the pull tab pulls the boss on the safety lever so as to enable the safety lever to rotate clockwise around the hinging point of the safety lever, and the safety block on the safety lever is completely separated from the stop block in the handle shell, so that the safety lever is in a cockable state; when the handle is pressed down to trigger, the middle piece of the pull tab is pushed open by the lug on the handle and the pull tab is deformed, so that the drag hook on the pull tab is far away from the boss on the safety lever, the drag hook loses the limiting function on the safety lever, the handle is loosened after the trigger is finished, the safety lever can rotate anticlockwise under the action of the reset spring, and the safety block on the safety lever is propped against the stop block in the handle shell again, so that the handle cannot be pressed down, and the function of preventing secondary triggering is achieved.

However, in the anastomat, after the firing is completed, the pull tab is deformed and cannot be automatically reset, namely, the pull tab loses the function of driving the safety lever to rotate again, so that the safety block on the safety lever can continuously lean against the stop block in the shell, the anastomat is continuously in a safety state that the anastomat cannot be fired, the circular tube type binding instrument cannot be reused, the reliability of the circular tube type binding instrument cannot be detected in a mode of experimental firing before the operation, a firing process of failure occurs in the operation, and the potential safety hazard of operation failure is caused.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the firing equipment cannot be reused due to the secondary firing prevention device of the firing equipment in the prior art; and the safety hidden trouble caused by the incapability of carrying out experimental detection on the firing equipment before use.

To this end, the invention provides a firing apparatus comprising

A base frame;

a first moving member slidably disposed between a start position and an action position with respect to the base frame;

an operating member having an abutment point for applying a force to the first moving member toward the acting position;

characterized in that it also comprises

A second moving member provided in a fixed state with respect to the base frame, the second moving member being in contact with the operating member, the second moving member constituting a fulcrum of the operating member;

the linkage part is movably arranged between a first position and a second position relative to the base frame; in the second position, the linkage member may transition the second motion member from a fixed state to a moving state;

and the reset mechanism is used for driving the second moving part to be switched to the fixed state and driving the linkage part to be reset to the first position in the moving state.

Further preferably, in the above firing device, one end of the operating member is hinged to the first moving member, and a first hinge point is formed on the first moving member;

the two ends of the supporting rod are respectively hinged to the operating part and the second moving part, and a second hinge point is formed on the second moving part;

in the fixed state, the second hinge point constitutes a fulcrum of the operating member; in the displaced state, the first hinge point constitutes a fulcrum of the operating member.

Further preferably, in the above firing device, a limiting area is formed on the second moving part;

the firing equipment further comprises a limiting mechanism which is slidably arranged on the second moving part between a third position and a fourth position relative to the base frame;

both ends of the linkage part are respectively arranged in linkage with the first motion part and the limiting mechanism; in the first position, the limiting mechanism is locked in the limiting area; and in the second position, the linkage part releases the locking of the limiting mechanism to the second moving part.

Further preferably, the above-mentioned firing device, the limiting mechanism comprises

The locking piece is inserted into the limiting area at the third position;

the second reset piece is arranged on the locking piece and is used for applying a second biasing force towards the limiting area to the locking piece;

the linkage part is matched with the locking piece, in the second position, the linkage part applies a pressing force back to the limiting area to the locking piece, and the locking piece exits from the limiting area.

Further preferably, in the firing device, when the interlocking member moves toward the second position, the locking member cooperates with the interlocking member through an inclined first guide surface, and the interlocking member generates the pressing force on the first guide surface.

Further preferably, in the above-described firing device, a protrusion protruding in a sliding direction of the lock member is formed on an inner wall surface of the lock member, and the interlocking member applies the pressing force to the lock member when the first guide surface is pressed against the protrusion.

Further preferably, in the above firing device, the end of the linkage member extending into the lock member is provided with the first guide surface facing the protruding portion;

In the first position, the first guide surface is remote from the projection; in the second position, an outer wall surface of the linking member on the same side as the first guide surface is abutted against the protruding portion.

Further preferably, the firing device further includes a stopper having one end fixed to the base frame and the other end passing through the locking member and extending toward the first moving member;

the other end of the linkage part extending into the locking part is slidably arranged on the limiting part, and the limiting part is used for limiting the movement range of the linkage part.

Further preferably, the above-mentioned firing device, the linkage member includes a first chute and a second chute provided on at least one side wall forming the first chute, and the opening directions of the first chute and the second chute are opposite;

the end part of the other end of the limiting piece is provided with a limiting part, the other end of the limiting piece extends into the first sliding groove, and the limiting part is embedded into the second sliding groove;

in the first position, the limiting part is abutted against the bottom of the second chute; in the second position, the limiting part is blocked at the opening of the second chute.

Further preferably, in the above firing device, in the first position, one end of the linkage member is overlapped on one end of the first moving member; in the active position, the end face of the one end of the linkage member is disengaged from the end face of the one end of the first moving member.

Preferably, the firing device further comprises a first reset element disposed between the base frame and the first moving element, and the first reset element applies a first biasing force to the first moving element toward one side of the second moving element.

Further preferably, the above-mentioned firing device, the reset mechanism comprises

A third restoring member disposed between the base frame and the second moving member and applying a third biasing force to the second moving member toward the first moving member;

a toggle member slidably disposed between a fifth position and a sixth position relative to the base frame;

the force receiving piece is arranged on the outer wall surface of the linkage part and is positioned between the stirring piece and the first moving part;

when the stirring piece slides towards the sixth position, the stirring piece applies stirring force towards the first position to the stressed piece, so that the linkage part is reset to the first position.

Preferably, in the firing device, a second guiding surface is provided on the force receiving member facing to one side end surface of the stirring member, and when the stirring member slides toward the sixth position, the stirring member faces to and abuts against the second guiding surface.

Preferably, the above firing device, the reset mechanism further includes a fourth reset member disposed on the base frame and abutting against the linkage member, and the fourth reset member applies a fourth biasing force to the linkage member toward the first position.

Preferably, the firing device further comprises a third moving component slidably arranged between a fifth position and a sixth position relative to the base frame, and the toggle piece is arranged on the third moving component;

the second moving part is sleeved on the third moving part.

Preferably, in the above firing device, the limiting area is a through hole or a groove formed in the second moving part.

The technical scheme of the invention has the following advantages:

1. according to the firing equipment provided by the invention, the secondary firing prevention device is arranged, after the primary firing of the firing equipment is finished, the handle is loosened, the linkage part drives the locking part to be separated from the limiting area under the drive of the first movement part, and the second movement part is converted from the fixed state to the moving state, so that the firing equipment is converted to the firing failure state.

The secondary firing prevention device can realize the function of automatically converting firing equipment into a firing failure state after the primary firing, can avoid the condition that the firing equipment is fired again due to the misoperation part after the primary firing, and has strong reliability.

2. The firing equipment provided by the invention is provided with the reset mechanism, the reset mechanism comprises the stress piece and the poking piece, and when the linkage part is positioned at the second position, the poking piece drives the stress piece to drive the linkage part to reset to the first position, namely the firing equipment is reset to an initial state.

The firing equipment can be subjected to experimental firing test before use, whether the functions of the parts such as the secondary firing prevention device and the like are normal and reliable or not is tested, and the firing equipment can be reset to an initial state after the test is completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a firing apparatus provided in embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of the firing device of FIG. 1 in a cocked state;

FIG. 3 is a cross-sectional view of the firing apparatus of FIG. 1 with the anti-secondary firing device activated;

FIG. 4 is a schematic view of a first moving component of the firing device of FIG. 1;

FIG. 5 is a side view of a lockout of the firing apparatus of FIG. 1;

FIG. 6 is a schematic view of the lockout structure of the firing device of FIG. 1;

FIG. 7 is a cross-sectional view of a lockout of the firing apparatus of FIG. 1;

FIG. 8 is a schematic view of a third moving component of the firing device of FIG. 1;

FIG. 9 is a schematic view of the linkage assembly and stop member of the firing device of FIG. 1;

FIG. 10 is a top view of the linkage assembly of the firing device of FIG. 1;

FIG. 11 is a schematic view of a stop member of the firing device of FIG. 1;

FIG. 12 is a schematic view of the linkage components of the firing device of FIG. 1;

FIG. 13 is a cross-sectional view of a housing of the firing device of FIG. 1;

FIG. 14 is a schematic view of a second motion component of the firing device of FIG. 1;

FIG. 15 is a schematic view of a transition piece construction of the firing apparatus of FIG. 1;

FIG. 16 is a cross-sectional view of a transition piece of the firing apparatus of FIG. 1;

FIG. 17 is a side view of a transition piece of the firing device of FIG. 1;

FIG. 18 is a schematic view of an anvil assembly of the firing apparatus of FIG. 1;

FIG. 19 is a schematic view of the staple pusher head of the firing apparatus of FIG. 1;

FIG. 20 is a schematic view of the cartridge of the firing apparatus of FIG. 1;

reference numerals illustrate:

1-a base frame; 11-a first limit part; 12-a second limiting part; 121-a first guide groove; 122-a first limiting hole; 13-a third limit part; 14-fourth limit parts; 15-a fifth limit part; 16-sixth limit part;

2-a first moving part; 21-a first abutment;

3-a second moving part; a 31-bit region; 32-a second abutment; 33-a first step; 34-a guide; 35-a second hinge point;

4-a third motion component; 41-a toggle; 42-a second driving member;

5-an operating member; 51-a first hinge point; 52-supporting rod; 53-a third hinge point;

6-a cartridge module; 61-nailing the tube; 62-nail bin; 63-pushing the nail head;

7-an anvil assembly; 71-an anvil head; 72-an anvil bar;

81-a transition piece; 811-a first end plate; 812-a second guide slot; 813-a second step; 814-a first support; 815-a second support; 816-mounting through holes; 817—a first channel; 818-a second bottom wall; 82-locking member; 821-protrusions; 8211-third guide surface; 822-a first limit post; 823-second pass; 83-a first reset member; 84-a second reset element; 85-a third reset member;

91-linkage part; 911-second limit posts; 912—a first guide surface; 913—a first chute; 914-a second chute; 915—a first side wall; 916-a second sidewall; 917—a first bottom wall; 919-first guide wall; 92-force-bearing member; 921-a second guide surface; 93-limiting pieces; 931-a limit pin; 932-card slot; 933-yield space; 94-first driving member.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The words "proximal" and "distal" in the present invention refer to the operator of the apparatus (not shown), and the end near the operator is the proximal end and the end far from the operator is the distal end.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The embodiment provides a firing device, as shown in fig. 1, which comprises a base frame 1, a nail anvil assembly 7, a nail cartridge assembly 6, a second driving piece 42, a first moving part 2, a second moving part 3, a third moving part 4, an operating part 5, a supporting rod 52, a first reset piece 83, a limiting mechanism, a reset mechanism and a secondary firing prevention device; wherein the firing device is a stapler; the limiting mechanism comprises a second reset piece 84, a transition piece 81 and a locking piece 82; the reset mechanism comprises a third reset piece 85, a toggle piece 41 and a stress piece 92.

As shown in fig. 13, the base frame 1 is a housing of the anastomat, and the housing is preferably composed of a left housing and a right housing; the shell is provided with an inner cavity penetrating along the axial direction of the shell, and a fourth limiting part 14, a fifth limiting part 15, a sixth limiting part 16, a first limiting part 11, a second limiting part 12 and a third limiting part 13 are sequentially arranged on the inner wall surface of the shell from the far end to the near end.

As shown in fig. 1 and 8, the third moving member 4 is preferably a screw disposed in the inner cavity of the housing, and the third moving member 4 is movable toward the distal end of the housing or the proximal end of the housing in the axial direction of the housing; the third moving part 4 is provided with a toggle member 41 on an outer wall surface thereof, the toggle member 41 extending radially outwardly of the third moving part 4, the toggle member 41 preferably being a pin.

The second driving member 42 is disposed on the proximal end of the housing and sleeved on the proximal end of the third moving member 4, and the proximal end of the third moving member 4 is in threaded engagement with the second driving member 42, and the second driving member 42 is preferably a knob; the operator rotates the knob in the clockwise direction, and drives the third moving part 4 to move towards the proximal direction of the shell through the threaded fit between the knob and the third moving part 4; the operator turns the knob in a counter-clockwise direction forcing the third movement member 4 in the distal direction of the housing.

As shown in fig. 1, 4, 8 and 13, the first moving part 2 is preferably a nail pushing rod, which is arranged at a position corresponding to the fourth limiting part 14 and the fifth limiting part 15 at the distal end of the inner cavity of the shell, and is sleeved on the distal end of the third moving part 4; the first moving member 2 is movable distally or proximally in the axial direction of the housing. The proximal end of the first moving member 2 is provided with a ring of first abutments 21 extending radially outwardly thereof.

The first reset element 83 is sleeved on the outer wall surface of the first moving part 2, the proximal end of the first reset element 83 is abutted against the first abutting part 21, the distal end of the first reset element 83 is abutted against the fourth limiting part 14, and the first reset element 83 has a first biasing force towards the proximal end of the shell; the first abutting part 21 abuts against the fifth limiting part 15 under the action of the first biasing force only without other external force, and the first moving part 2 is at the initial position; in this way, the first moving part 2 is kept in a constant trend towards the proximal end of the housing by the first return member 83, the first return member 83 preferably being a compression spring.

As shown in fig. 1, 13-14, and 16-17, the transition piece 81 is disposed between the first limit portion 11 and the second limit portion 12; the transition piece 81 is located between the toggle piece 41 and the proximal end of the second moving part 3; in the initial state, the distal end of the transition piece 81 abuts against the first limiting portion 11. Second guide grooves 812 extending along the axial direction of the shell are formed in the two symmetrical inner wall surfaces of the transition piece 81; the distal end of the transition piece 81 is further provided with a first end plate 811 through which the third moving member 4 can pass; the proximal end face of the first end plate 811 and the distal end face of the second moving member 3 are opposed to each other and adapted to abut against each other.

As shown in fig. 14, the second moving member 3 is preferably a sliding sleeve which is sleeved on the opposite proximal end of the third moving member 4 and can move distally or proximally along the axial direction of the housing; the proximal end of the second moving part 3 is provided with a first step 33 recessed inwards in the radial direction thereof, and a second abutting part 32 extending outwards in the radial direction of the second moving part 3 is further arranged at the distal end of the first step 33; guide parts 34 extending along the axial direction of the shell are respectively arranged on two symmetrical side wall surfaces of the second moving part 3, a guide groove 812 is arranged on the transition piece 81 along the axial direction, and the guide parts 34 are penetrated in the second guide groove 812 so as to obtain reliable movement; the top end outer wall surface of the second moving part 3 is provided with an inwards concave limit area 31.

As shown in fig. 1, the third restoring member 85 is sleeved on the outer wall surface of the third moving part 4, the proximal end of the third restoring member 85 abuts against the third limiting part 13, and the distal end of the third restoring member 85 is sleeved on the first step 33; the third restoring member 85 has a third biasing force toward the distal end of the housing that is substantially less than the first biasing force; the second abutment 32 thus abuts against the second limiting part 12 and the distal end face of the second moving part 3 abuts against the proximal end face of the first end plate 811 without other external force and only under the action of the third biasing force, at which time the second moving part 3 is in its initial position; in this way, the second moving member 3 is kept in a constant trend towards the distal end of the housing by the action of the third restoring member 85, the third restoring member 85 preferably being a compression spring.

As shown in fig. 1, 4 and 14, the operating member 5 is preferably a handle, the distal end of which is hinged to the proximal end of the first moving member 2 by a rotation pin, the hinge point is a first hinge point 51, the proximal end of the handle extends out of the housing through an opening in the side wall of the housing, and the shape of the handle is suitable for being held by the hand of a human body.

The distal end of the strut 52 is hinged to the proximal end of the handle to form a third hinge point 53; the proximal end of the strut 52 is hinged to the distal end of the second moving member 3, forming a second hinge point 35.

When the anastomat is in an initial state, the first reset piece 83 acts on the first moving part 2, so that the first abutting part 21 abuts against the fifth limiting part 15; meanwhile, the second abutting portion 32 abuts against the upper portion of the second stopper portion 12 due to the third restoring member 85, and the distal end face of the second moving member 3 abuts against the proximal end face of the first end plate 811. Since the distal end of the handle is hinged to the first moving part 2 by means of the first hinge point 51; connected at the proximal end to the second moving part 3 by a second hinge point 35; thus, in the initial state, the handle can maintain a stable opening angle by the first hinge point 51 and the second hinge point 35.

As shown in fig. 1, 5-8 and 13-17, the transition piece 81 is further provided with a mounting through hole 816 penetrating along the radial direction of the shell, and the width of the limiting area 31 along the axial direction of the shell is not smaller than the width of the mounting through hole 816 along the axial direction of the shell; the locking member 82 is slidably disposed in the mounting through hole 816 in the radial direction of the housing, and the distal end face and the proximal end face of the locking member 82 are respectively in contact with the distal end face and the proximal end face of the mounting through hole 816, so that the locking member 82 can slide along the inner wall faces of the proximal end and the distal end of the mounting through hole 816.

As shown in fig. 5, a first limiting post 822 is formed on the outer wall surface of one side of the locking piece 82, which faces away from the axial direction of the third moving part 4, one end of the second reset piece 84 is sleeved on the first limiting post 822, and the other end of the second reset piece abuts against the inner wall surface of the shell; the second return member 84 has a second biasing force directed axially towards the third moving member 4, the second return member 84 preferably being a compression spring.

When the anastomat is in the triggerable state, the limiting region 31 is opposite to the mounting through hole 816, at the moment, one end of the locking piece 82 facing the third moving part 4 is partially inserted into the limiting region 31 under the action of the second resetting piece 84, at the moment, the locking piece 82 is in the third position, and the transition piece 81 and the second moving part 3 are locked into a whole through the locking piece 82, namely, the second moving part 3 is in a fixed state relative to the shell.

When the second moving part 3 is in a fixed state relative to the housing, the second hinge point 35 forms a rotation fulcrum of the handle, i.e. the stapler is in a cockable state as shown in fig. 2; the handle is then pressed, and the first moving part 2 is moved from its starting position to the active position, while the second moving part 3 remains stationary, driven by the handle.

As shown in fig. 5-7 and 15-17, the transition piece 81 is provided with a first channel 817 along the axial direction of the shell, and the first channel 817 is connected with the mounting through hole 816; the locking piece 82 is provided with a second channel 823 along the axial direction of the shell, and the second channel 823 and the first channel 817 can be at least partially communicated; the inner wall surface of the second passage 823 on the side far from the third moving member 4 is provided with a protruding portion 821 extending along the radial direction of the housing, the longitudinal section of the protruding portion 821 is in a trapezoid shape, the long side of the trapezoid is arranged on the inner wall surface of the second passage 823, the short side of the trapezoid is far from the inner wall surface of the second passage 823, and the waist of the trapezoid corresponds to two inclined third guide surfaces 8211 of the protruding portion 821.

A first supporting portion 814 protruding radially along the housing and a second bottom wall 818 at the distal end of the first supporting portion 814 are provided on the bottom inner wall surface at the distal end of the first channel 817; the bottom inner wall surface of the proximal end of the first channel 817 is provided with a second supporting portion 815 protruding along the radial direction of the housing, and distal ends of the first supporting portion 814 and the second supporting portion 815 are inclined guiding surfaces.

As shown in fig. 1, 5-7, 9-13 and 15-17, the secondary firing preventing device includes a linkage member 91, a limiting member 93, a first driving member 94 and a sixth limiting portion 16, where the sixth limiting portion 16 is disposed on an inner wall surface of the housing and located between the fifth limiting portion 15 and the first limiting portion 11.

The upper part of the second limiting part 12 is provided with a first limiting hole 122, the proximal end of the limiting piece 93 is provided with a clamping groove 932 matched with the first limiting hole 122, and the limiting piece 93 is fixed on the second limiting part 12 through the matching of the clamping groove 932 and the first limiting hole 122; the distal end of the limiting member 93 extends out of the transition member 81 after passing through the first channel 817 and the second channel 823, and in an initial state, the bottom wall surface of the limiting member 93 abuts against the second supporting portion 815; two symmetrical limiting parts, preferably limiting pins 931, are arranged on the side wall surface of the distal end of the limiting part 93.

The side wall surface of the limiting member 93 facing the protruding portion 821 is provided with an inward concave yielding space 933, and when the locking member 82 is in the third position, the protruding portion 821 is located in the yielding space 933.

When the stapler is in a fixed state, i.e. a cocked state, as shown in fig. 2, and the handle is not depressed for cocking, the proximal end of the linkage member 91 passes through the first channel 817 and extends into the second channel 823; a chamfer, preferably an inclined first guide surface 912, is provided on the side of the proximal end of the linkage member 91 facing the protrusion 821; the proximal end of the linkage member 91 is provided with a first sliding groove 913 extending from the proximal end to the distal end, the first sliding groove 913 penetrates the proximal end of the linkage member 91 in the radial direction of the housing, and a first side wall 915 and a second side wall 916 of the first sliding groove 913 are formed at the proximal end of the linkage member 91; the upper parts of the distal ends of the first side wall 915 and the second side wall 916 are provided with symmetrical second sliding grooves 914, and the distal ends of the limiting pieces 93 are arranged in the first sliding grooves 913; the upper wall surface of the distal end of the linkage part 91 is provided with a second limit post 911, the distal end of the first driving part 94 is sleeved on the second limit post 911, the proximal end of the first driving part 94 is abutted against the sixth limit part 16, and the first driving part 94 has a fifth biasing force which faces the axial direction of the third moving part 4 and is biased towards the distal end direction of the shell; two wing-shaped stress members 92 extending outwards are symmetrically arranged on two side wall surfaces of the distal end of the linkage part 91, the end surface of the stress member 92, which faces the third moving part 4, is a second inclined guide surface 921, and the second guide surface 921 is suitable for being matched with the poking piece 41.

As shown in fig. 12, the distal end of the linkage member 91 is provided with a first bottom wall 917, and a first guide wall 919 at the distal end of the first bottom wall; when the stapler is in the triggerable state as shown in fig. 2 and the handle is not pressed down for triggering, the limiting pins 931 are located at the proximal ends of the two second slide slots 914, the first guiding wall 919 is located at the distal end of the first supporting portion 814, and the first bottom wall 917 is abutted against the first supporting portion 814; the first guiding surface 912 at the proximal end of the linkage member 91 is located at the distal end of the protruding portion 821, and the distal end of the linkage member 91 is overlapped on the side wall surface of the first moving member 2 in the radial direction of the housing, and at this time, the linkage member 91 is in the first position.

When the stapler is in the triggerable state as shown in fig. 2, the handle is pressed down to drive the first moving member 2 from the initial position to the active position, compressing the first restoring member 83, at this time, the distal end of the linkage member 91 rotates about the limit pin 931 and moves toward the axial direction of the third moving member 4 under the action of the first driving member 94, and finally, the distal end face of the linkage member 91 and the projection of the proximal end face of the first moving member 2 in the housing axial direction overlap the outer wall face of the third moving member 4.

Then the handle is released, the first moving part 2 moves from the acting position to the starting position under the action of the first reset element 83, and then the linkage part 91 is driven to move towards the proximal end of the shell through the abutting of the proximal end surface of the first moving part 2 and the distal end surface of the linkage part 91, so that the second guide surface 921 on the linkage part 91 abuts against the third guide surface 8211 on the protruding part 821, and the locking element 82 is driven to deviate from the limit region 31 towards one end of the third moving part 4, the bottom end surface of the protruding part 821 abuts against the top end surface of the proximal end of the linkage part 91, and the locking element 82 is at the fourth position; the stop pin 931 is separated from the second chute 914, the bottom end surface of the proximal end of the linkage member 91 abuts against the first supporting portion 814, so that the locking member 82 maintains the fourth position separated from the stop region 31, and the transition member 81 and the second moving member 3 are unlocked from each other;

since the first biasing force is much greater than the third biasing force, the second moving member 3 is movable relative to the first moving member 2, while the first moving member 2 is fixed relative to the second moving member 3, with the second moving member 3 in a moving state, the first hinge point 51 constituting a pivot point of the handle; at this time, the handle driving strut 52 is pressed to drive the second moving part 3 to move towards the proximal end of the housing, while the first moving part 2 keeps its initial position, at this time, the linkage part 91 is at its second position, i.e. the secondary firing prevention device is started, and the stapler is converted into a firing failure state after the first firing as shown in fig. 3.

When the anastomat is in the firing failure state after the first firing as shown in fig. 3, an operator rotates the knob in the anticlockwise direction, drives the third moving part 4 to move towards the distal end of the shell so as to drive the poking piece 41 to move towards the distal end of the shell, at the moment, the poking piece 41 moves from the fifth position to the sixth position and is abutted with the second guide surface 921 on the stress piece 92, and further drives the distal end of the linkage part 91 to move in the axial direction far away from the third moving part 4 through the abutting action of the poking piece 41 on the second guide surface 921, the distal end of the linkage part 91 is reset to the first position overlapped on the side wall surface of the first moving part 2 in the radial direction, and the first guide surface 912 is far away from the protruding part 821; meanwhile, the transition piece 81 moves to the distal end to abut against the first limiting portion 11 under the action of the third reset piece 85 after losing the action of the toggle piece 41, and the limiting area 31 is staggered from the mounting through hole 816, so that the whole anastomat is reset to the initial state.

As shown in fig. 1, 19 and 20, the cartridge assembly 6 includes a cartridge 61, a push head 63 and staples, the cartridge 61 is mounted at a distal opening of the housing, distal ends of the first moving member 2 and the third moving member 4 extend into an inner cavity of a proximal end of the cartridge 61, an annular cartridge 62 is disposed at a distal end of the cartridge 61, and the staples are disposed in the cartridge 62 along a circumferential direction of the cartridge 62.

A pusher head 63 is slidably disposed within the interior cavity of the cartridge 61 and is preferably configured to mate with the interior cavity of the cartridge 61 with a proximal end thereof connected to the distal end of the first moving member 2, the distal end being in registry with a staple and adapted to eject the staple from the staple cartridge 62; an annular blade is provided at the distal end of the push head 63 at a position corresponding to the inner ring of the staples.

As shown in fig. 1 and 18, the anvil assembly 7 includes an anvil head 71 and an anvil rod 72, the anvil head 71 being disposed at a distance from the distal end of the cartridge 62 and facing the staples, the proximal end of the anvil head 71 being provided with a recess facing each staple; anvil 71 is preferably of a conical-like configuration with the bottom of the conical configuration at the proximal end and the top at the distal end; the anvil rod 72 is inserted into the inner cavity of the cartridge 61 and the ejector pin 63, and the proximal end of the anvil rod 72 is connected to the distal end of the third moving member 4 by a pin, and the distal end of the anvil rod 72 is fixedly connected to the proximal end of the anvil head 71 at a central position.

The anvil head 71 can reciprocate along the axial direction of the casing under the drive of the third moving component 4, the push head 63 can reciprocate along the axial direction of the casing under the drive of the first moving component 2, when the anvil head 71 is away from the staples by a preset distance, the push head 63 moves towards the distal end of the casing and ejects the staples out of the staple cartridge 62, thereby suturing the tissue between the proximal end of the anvil head 71 and the distal end of the staple cartridge 62, and simultaneously, the annular blade on the push head 63 cuts off the superfluous tissue after suturing.

The anastomat is provided with a secondary firing prevention device, and after the primary firing is finished and the handle is released, in the process of resetting the first moving part 2 from the acting position to the starting position, the second moving part 3 is converted into a moving state from a fixed state by driving the linkage part 91 to move proximally, namely the anastomat is automatically converted into a firing failure state from a firing state. The anastomat can be automatically converted into a firing failure state through the secondary firing prevention device after the primary firing, so that the condition that the operation is failed due to the fact that the handle is touched by mistake after the primary firing is avoided, and the reliability is high.

The secondary firing prevention device is also provided with a stress piece 92, when the linkage part 91 is in the second position and the anastomat is in the firing failure state, the linkage part 91 is reset to the first position by the action of the stirring piece 41 and the stress piece 92, namely, the anastomat is reset to the initial state before the primary firing. The anastomat can be subjected to experimental firing test before operation, and whether the functions of the components such as the secondary firing prevention device and the like are normal and reliable is tested, so that the success of the operation is ensured, the anastomat can be reset to an initial state after the test is finished, and the operation is started.

Example 2

The present embodiment provides a firing apparatus, which differs from the structure of the firing apparatus provided in embodiment 1 only in that the housing, the cartridge 61, and the anvil 71 may have other shaped structures, the specific structure being determined by the use of a ring shape, for example, the housing and the cartridge 61 may have a circular tube-type structure with a certain curvature, which is more suitable for extending into the interior of tubular tissue;

as a further alternative embodiment, the anvil head 71 is entirely of a bell configuration with an opening at the distal end adapted to fit over the glans, in which case the firing device is a circumcision stapler.

Example 3

The present embodiment provides a firing device, which differs from the structure of the firing device provided in any of embodiments 1-2 only in that the toggle member 41 is a toggle pin slidably disposed on a wall surface of the housing, one end of the toggle pin is located outside the housing and adapted for manual control by an operator, and the other end of the toggle pin is located in an inner cavity of the housing, and the force-receiving member 92 is driven by manual control of the toggle pin by the operator, so as to reset the linkage member 91 from the second position to the first position.

Example 4

This embodiment provides a firing device that differs from the structure of the firing device provided in any of embodiments 1-3 only in that the third restoring member 85 may not generate a third biasing force when the second moving member 3 is in its initial position, and the third restoring member 85 may generate a third biasing force when the second moving member 3 is moved proximally;

As a further alternative, the second reset element 84 may be omitted, and the operator manually drives the limit region 31 of the second moving member 3 to face the mounting through hole 816 through the handle.

Example 5

This embodiment provides a firing device that differs from the configuration of the firing device provided in any of embodiments 1-4 only in that the second driver 42 rotates in a counter-clockwise direction, forcing the third moving member 4 proximally; further, the second driver 42 may not be provided, and the operator may manually control the movement of the third moving member 4, and temporarily fix the position by a set screw penetrating through the housing wall surface and abutting on the outer wall surface of the third moving member 4.

Example 6

This embodiment provides a firing device, which differs from the structure of the firing device provided in any one of embodiments 1 to 5 only in that the secondary firing preventing device may be provided with only the linkage member 91 without the positioning member 93, and at this time, a fourth reset member needs to be provided, one end of the fourth reset member abuts against the second positioning portion 12, the other end abuts against the proximal end of the linkage member 91, and the fourth reset member has a fourth biasing force in the distal direction of the housing; the linkage member 91 itself has elasticity, and when the first moving member 2 moves from the start position to the action position, the linkage member 91 moves from the first position to the second position by the own elasticity and returns to the first position by the cooperation of the toggle piece 41 and the fourth returning piece.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A firing apparatus comprising

A base frame (1);

a first moving part (2) slidably arranged between a starting position and an active position with respect to the base frame (1);

an operating member (5) having an abutment point for applying a force to the first moving member (2) toward the acting position;

characterized in that it also comprises

A second moving member (3) provided in a fixed state with respect to the base frame (1), the second moving member (3) being in contact with the operating member (5), the second moving member (3) constituting a fulcrum of the operating member (5);

a linkage member (91) movably disposed between a first position and a second position with respect to the base frame (1); in the second position, the linkage member (91) can switch the second moving member (3) from a fixed state to a moving state;

A reset mechanism for driving the second moving member (3) to switch to the fixed state and driving the linkage member (91) to reset to the first position in the moving state;

one end of the operating component (5) is hinged on the first moving component (2), and a first hinge point (51) is formed on the first moving component (2);

the operating part (5) further comprises a supporting rod (52), two ends of the supporting rod are respectively hinged to the operating part (5) and the second moving part (3), and a second hinge point (35) is formed on the second moving part (3);

in the fixed state, the second hinge point (35) constitutes a fulcrum of the operating member (5); in the displaced state, the first hinge point (51) forms a fulcrum for the operating member (5).

2. The firing device according to claim 1, characterized in that the second moving part (3) is provided with a limit area (31);

the firing equipment further comprises a limiting mechanism which is slidably arranged on the second moving part (3) between a third position and a fourth position relative to the base frame (1);

both ends of the linkage part (91) are respectively arranged in linkage with the first moving part (2) and the limiting mechanism; in the first position, the limit mechanism is locked within the limit area (31); in the second position, the linkage member (91) releases the lock of the second moving member (3) by the stopper mechanism.

3. The firing apparatus of claim 2, wherein the limit mechanism comprises

A locking element (82) which, in the third position, is inserted in the limit region (31);

a second return member (84) disposed on the locking member (82) for applying a second biasing force to the locking member (82) toward the limit area (31);

the linkage part (91) is matched with the locking piece (82), in the second position, the linkage part (91) applies an abutting force to the locking piece (82) back to the limiting area (31), and the locking piece (82) is withdrawn from the limiting area (31).

4. The firing apparatus of claim 3, wherein the lockout (82) cooperates with the lockout member (91) through an angled first guide surface (912) as the lockout member (91) moves toward the second position, the lockout member (91) creating the abutment force on the first guide surface (912).

5. The firing apparatus according to claim 4, wherein a protrusion (821) protruding in a sliding direction thereof is formed on an inner wall surface of the lock (82), and the interlocking member (91) applies the pressing force to the lock (82) when the first guide surface (912) presses against the protrusion (821).

6. The firing apparatus according to claim 5, wherein the end of the linkage member (91) that protrudes into the lock (82) is provided with the first guide surface (912) facing the protrusion (821);

in the first position, the first guide surface (912) is remote from the protrusion (821); in the second position, an outer wall surface of the interlocking member (91) on the same side as the first guide surface (912) is abutted against the protruding portion (821).

7. The firing device according to claim 6, further comprising a stopper (93) having one end fixed to the base frame (1) and the other end passing through the locking member (82) and extending in the direction of the first moving member (2);

the other end of the linkage part (91) extending into the locking piece (82) is slidably arranged on the limiting piece (93), and the limiting piece (93) is used for limiting the movement range of the linkage part (91).

8. The firing apparatus of claim 7, wherein the linkage member (91) comprises a first chute (913) and a second chute (914) disposed on at least one sidewall forming the first chute (913), the first chute (913) and the second chute (914) opening in opposite directions;

A limiting part is arranged at the end part of the other end of the limiting part (93), the other end of the limiting part (93) stretches into the first chute (913), and the limiting part is embedded into the second chute (914);

in the first position, the limiting part is abutted against the bottom of the second chute (914); in the second position, the limiting part is blocked at the opening of the second chute (914).

9. The firing apparatus of claim 8 wherein the firing device comprises a firing cartridge,

in the first position, one end of the linkage member (91) is overlapped on one end of the first moving member (2); in the active position, the end face of the one end of the linkage member (91) is disengaged from the end face of the one end of the first moving member (2).

10. The firing apparatus according to any one of claims 1-9, further comprising a first return member (83) disposed between the base frame (1) and the first moving member (2), the first return member (83) applying a first biasing force to the first moving member (2) toward a side of the second moving member (3).

11. The firing device according to claim 10, characterized in that said return mechanism comprises a third return element (85) arranged between said base frame (1) and said second moving part (3) and exerting a third biasing force on said second moving part (3) towards one side of said first moving part (2);

A toggle member (41) slidably arranged between a fifth position and a sixth position with respect to the base frame (1);

the force receiving piece (92) is arranged on the outer wall surface of the linkage part (91) and is positioned between the stirring piece (41) and the first moving part (2);

when the poking piece (41) slides towards the sixth position, the poking piece (41) applies poking force towards the first position to the stress piece (92) so as to reset the linkage part (91) to the first position.

12. The firing device according to claim 11, wherein a second guiding surface (921) is provided on a side end surface of the force receiving member (92) facing the shifting member (41), and the shifting member (41) faces and abuts against the second guiding surface (921) when the shifting member (41) slides toward the sixth position.

13. The firing apparatus of claim 11, wherein the reset mechanism further comprises a fourth reset member disposed on the base frame (1) and abutting the linkage member (91), the fourth reset member applying a fourth biasing force to the linkage member (91) toward the first position.

14. The firing device according to claim 11, further comprising a third moving part (4) slidably arranged between a fifth position and a sixth position with respect to the base frame (1), the toggle member (41) being arranged on the third moving part (4);

The second moving part (3) is sleeved on the third moving part (4).

15. Firing device according to claim 2, characterized in that the limit area (31) is a through hole or a recess provided in the second moving part (3).