CN109984794B

CN109984794B - Firing equipment

Info

Publication number: CN109984794B
Application number: CN201711473891.2A
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: 2024-06-28
Anticipated expiration: 2037-12-29
Also published as: CN109984794A

Abstract

The invention discloses a firing equipment, which comprises a base frame; a first moving part slidably disposed between a start position and an action position with respect to the base frame; 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 switchably disposed between a fixed state and a moving state with respect to the base frame; in the fixed state, the second moving part is abutted with the operating part, and the second moving part forms a fulcrum of the operating part; in the moving state, the initial position of the first moving part forms a fulcrum of the operating part, and the firing equipment is in a firing failure state, so that a firing prevention safety function is realized. The second moving part and the operating part of the firing equipment are in a movable state, and compared with a structure for realizing a safety function by locking the position of the operating part, the condition that the operating part is forced to move by excessive external force to damage the structure of the firing equipment can be completely avoided.

Description

Firing equipment

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to firing equipment.

Background

The anastomat is used in medicine to replace traditional manual suturing equipment, and the anastomat used clinically at present has the advantages of quick suturing, simple and convenient operation, few side effects, surgical complications and the like, and is favored and appreciated by clinicians 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 operation after circumcision and hemorrhoid circular cutting at present.

In order to prevent the occurrence of false firing phenomenon of the anastomat during operation, a safety device is arranged in the existing anastomat, for example, an anastomat disclosed in Chinese patent document CN1785127A, and the anastomat comprises a shell, a nail pushing rod, a screw rod, a handle, a binding head, an indication window, a knob and a safety device. For convenience in description, one end close to an operator is expressed as a proximal end, one end correspondingly far away from the operator is expressed as a distal end, an indication window is formed in the shell, and a cockable position range and an unfired position range of the stapler are displayed in the indication window; one end of the handle is hinged with the shell and is abutted against the proximal end of the nail pushing rod; the screw rod is slidably arranged in the shell, the screw rod penetrates through the nail pushing rod, two ends of the screw rod are respectively leaked outside the presumption rod, a knob is arranged on the proximal end of the screw rod, and a binding head is arranged on the distal end of the screw rod. The safety device comprises a safety rod and a pull piece. One end of the bumper is abutted against the lug of the handle, and the other end of the bumper is provided with a pointer which points to the position in the indication window; the proximal end of the pull tab is sleeved on the screw rod, and the distal end is hooked on the bumper.

When the anastomat is used, the pointer starts to point to the range of the unfired position, an operator rotates the knob to drive the screw rod to slide towards one side of the proximal end of the screw rod, the pull piece slides along with the screw rod, the distal end of the pull piece can stir the safety rod to rotate on the shell, one end of the safety rod, which is propped against the convex block, is separated from the convex block, and the limitation on the handle is released; when the operator rotates the knob and continuously observes the pointing position of the pointer in the indication window, after the medical staff observes that the pointer moves from the unfired position to the unfired position range, the operator can push the handle, and the handle drives the nail pushing rod to extend distally, so that the firing process is realized.

However, in the safety device of the anastomat, an operator judges whether the anastomat is in a triggerable position range by observing the pointing position of the pointer in the indication window in operation, but because of more interference factors in the operation process and the deviation of the sight angle of the operator, misjudgment of doctors can be caused, the handles are pressed for the triggerable position, at the moment, the pointer does not point to the triggerable position range actually, one end of the safety rod still abuts against the bump of the handles to play a limiting role on the handles, and if the operator presses the handles with larger acting force at the moment, the shell of the anastomat and the internal structure of the shell of the anastomat can be damaged.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is that the existing anastomat is easy to damage when an operator misjudges.

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;

The second moving part is arranged in a switching way between a fixed state and a moving state relative to the base frame, and is abutted with the operating part; in the fixed state, the second moving member constitutes a fulcrum of the operating member; in the moving state, the first moving member constitutes a fulcrum of the operating member.

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 device also comprises a support rod, wherein two ends of the support rod are hinged with the operating part and the second moving part, and a second hinge point is formed on the second moving part.

Further preferably, in the above firing device, a first supporting portion is provided at one end of the first moving member facing the second moving member, and a second limiting portion is provided on an inner wall surface of the base frame;

when the first abutting part of the first moving part abuts against the second limiting part of the base frame, the first moving part is positioned at the initial position;

when the operating part takes the second hinging point as a rotating fulcrum to drive the first moving part to move in the direction away from the second moving part, the first moving part is positioned at the action position.

Further preferably, the above firing apparatus further comprises:

a limit mechanism that locks the second moving member in the fixed state; in the moving state, the lock on the second moving member is released.

Further preferably, the above firing device, the limiting mechanism includes: the limiting area is arranged on the second moving part;

A locking member slidably disposed on the base frame in a sliding direction intersecting the second moving member;

Under the drive of external force, the locking piece enters into the limit area or leaves the limit area.

Further preferably, in the above firing device, the limiting area is a first through hole formed in the second moving part.

Further preferably, the above firing device, the limiting mechanism further includes:

a third moving member slidably disposed between a first position and a second position relative to the base frame;

a yielding area corresponding to the first through hole is formed on the side wall of the third moving part;

In the fixed state, one end of the locking piece, facing the yielding area, is inserted into the first through hole and stretches into the yielding area.

Further preferably, in the firing device, the limiting mechanism further includes a second reset member disposed between the locking member and the base frame, and the second reset member applies a second biasing force to the locking member toward the yielding area.

Further preferably, in the firing device, the locking member includes a mounting portion and a limiting portion that can cooperate with the first through hole and the relief area.

Further preferably, the above firing device, the relief area includes at least one first guide surface disposed obliquely; the third moving member is pushed out of the relief area along the first guide surface when sliding toward the second position.

Preferably, the firing device further comprises:

the first reset piece is sleeved on the first moving part and is used for applying a first biasing force to the first moving part towards one side of the second moving part;

the third reset piece is sleeved on the third moving part and abuts against the second moving part, and applies a third biasing force to the second moving part towards the first moving part;

The third biasing force is less than the first biasing force.

Preferably, the firing device further comprises a secondary firing prevention mechanism for switching the second moving member from the fixed state to the moving state when the first moving member is reset from the acting position to the starting position.

Further preferably, the above firing device, the secondary firing preventing mechanism includes:

The linkage part is movably arranged between a third position and a fourth position relative to the base frame, and one end of the linkage part is in linkage arrangement with the locking piece;

In the fourth position, the linkage part drives the locking piece to be separated from the yielding area; the third moving member drives the linkage member to return to the third position as the third moving member slides toward the second position.

Further preferably, in the above firing device, the locking member is provided with a mounting cavity extending in a sliding direction of the second moving member, the linkage member is penetrated in the mounting cavity,

The linkage part comprises a concave part and a convex part which is arranged on the concave part and is close to the first motion part, and the concave part is in transitional connection with the convex part through an inclined second guide surface.

Further preferably, in the above firing device, in the third position, the other end of the linkage member is radially overlapped on a side wall surface of one end of the first moving member along the base frame; in the active position, the other end of the linkage member is disengaged from the one end of the first moving member.

Further preferably, in the above firing device, the secondary firing preventing mechanism further includes a toggle member disposed on the third moving member, and a force receiving member disposed on the linkage member; when the third moving part slides towards the second position, the stirring part drives the stress part to drive the linkage part to reset to the third position.

Further preferably, in the above firing device, the secondary firing preventing 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 moving member.

Further preferably, in the firing device, the linkage member is made of an elastic material.

The technical scheme provided by the invention has the following advantages:

1. According to the firing equipment provided by the invention, when the firing equipment is in the safety state, namely the firing failure state, the operation part is pressed down to only drive the second movement part to move, and the first movement part does not move relative to the base, so that the safety function of preventing false firing is achieved; meanwhile, because the second moving part and the operating part are both in a movable state, compared with the traditional structure for realizing the safety function by locking the position of the operating part, the condition that the operating part is forced to move by excessive external force to damage the structure of the firing equipment can be completely avoided.

2. According to the firing equipment provided by the invention, the automatic switching between the fixed state and the moving state of the second moving part can be realized through the movement of the third moving part, namely, the automatic switching between the on and off of the safety function of the firing equipment is realized, and the flexibility is good.

3. The firing equipment provided by the invention is also provided with the secondary firing prevention mechanism, so that the function of automatically converting the firing equipment into a firing failure state after the primary firing can be realized, the condition that the firing equipment is fired again due to the fact that an operation part is touched by mistake after the primary firing can be avoided, and the reliability is high.

4. The firing equipment provided by the invention can be subjected to experimental firing test before use, so that whether the functions of the limiting mechanism, the secondary firing prevention mechanism and other parts are normal and reliable can be 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 the stapler provided in embodiment 1 of the present invention in an initial state;

FIG. 2 is a schematic view of a first moving part of the stapler of FIG. 1;

FIG. 3 is a schematic view of the cartridge of the stapler of FIG. 1;

FIG. 4 is a schematic view of the staple pusher of the stapler of FIG. 1;

FIG. 5 is a schematic view of an anvil assembly of the stapler of FIG. 1;

FIG. 6 is a schematic view of the base structure of the stapler of FIG. 1;

FIG. 7 is a schematic view of the receiving space of the stapler of FIG. 1;

FIG. 8 is a schematic view of a second moving part of the stapler of FIG. 1;

FIG. 9 is a schematic view of the locking member of the stapler of FIG. 1;

FIG. 10 is a front cross-sectional view of the locking element of the stapler of FIG. 1;

FIG. 11 is a side cross-sectional view of a locking member of the stapler of FIG. 1;

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

FIG. 13 is a schematic view of a third moving part of the stapler of FIG. 1;

FIG. 14 is an enlarged partial cross-sectional view of the stapler of FIG. 1;

FIG. 15 is an enlarged partial cross-sectional view of the stapler of FIG. 1 in a cocked state;

FIG. 16 is an enlarged partial cross-sectional view of the stapler of FIG. 1 in a firing position;

FIG. 17 is an enlarged partial cross-sectional view of the stapler of FIG. 1 after firing is completed;

FIG. 18 is an enlarged partial cross-sectional view of the stapler of FIG. 1 in a cocked state;

FIG. 19 is a schematic view of the housing of the stapler of FIG. 1;

reference numerals illustrate:

11-an operating member; 12-a first reset element; 13-a first moving part; 131-a first hinge point; 132-a first abutment; 133-a third hinge point; 14-a third moving part; 141-yielding area; 15-a housing; 151-a first limit part; 152-a second limit part; 153-a third limit part; 154-a fourth limit part; 16-a driving member; 17-cartridge module; 171-pushing the nail head; 172-nailing the tube; 18-an anvil assembly; 181-anvil head; 182-anvil bar;

21-a second moving part; 211-a first through hole; 212-a guide; 213-a second abutment; 214-a guide distal face; 221-a third reset element; 222-a second reset element; 223-base; 2231-a first runner; 2232-a second runner; 2233-distal end face of the second runner; 2234-base aperture; 2235-a base wall; 2236-yielding; 2237-a second notch; 2238-a first notch; 2239-accommodating space; 224-locking member; 2241-mounting cavity; 2242-mounting part; 2243-limiting protrusions; 2244-defining part; 2245-first part; 2246-second part; 2247-first guide surface; 2248-a first arcuate surface;

3-supporting rods; 31-a second hinge point;

41-linkage part; 411-recesses; 412-a boss; 413-a second guide surface; 414-a fifth limit part; 421—a toggle; 422-force-bearing member; 423-a fourth reset member; 425-third guide surface.

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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 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.

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 present embodiment provides a firing device, as shown in fig. 1, which is an anastomat, and includes a base frame, a first moving part 13, an operating part 11, a second moving part 21, a supporting rod 3, a driving part 16, a nail cartridge assembly 17, an anvil assembly 18, a limiting mechanism and a secondary firing prevention mechanism, wherein the limiting mechanism includes a third moving part 14, a base 223 and a locking part 224.

The base frame is a shell 15, preferably comprises a left shell and a right shell, and the shell 15 is provided with an inner cavity penetrating along the axial direction; for convenience of description, a direction from the proximal end of the housing 15 toward the distal end of the housing 15 in the axial direction of the housing 15 is specified as a first direction, and a direction opposite to the first direction is specified as a second direction.

The third moving part 14 is preferably a screw rod disposed in the inner cavity of the housing 15, the third moving part 14 can reciprocate along the first direction or the second direction, and the circumferential outer wall surface of the third moving part 14 is provided with an annular abdication area 141 corresponding to the limit mechanism.

The driving member 16 is disposed on the proximal end of the housing 15 and sleeved on the proximal end of the third moving member 14, and the driving member 16 is in threaded engagement with the proximal end of the third moving member 14, preferably a knob, and the operator rotates the knob in a clockwise direction to drive the third moving member 14 to move in the second direction and rotates the knob in a counterclockwise direction to drive the third moving member 14 to move in the first direction through threaded engagement between the knob and the third moving member 14. Of course, the operator may drive the third moving member 14 to move in the second direction when turning the knob in the counterclockwise direction, and drive the third moving member 14 to move in the first direction when turning the knob in the clockwise direction.

As shown in fig. 1,2 and 19, the first moving member 13 is preferably a push pin, which is disposed in the inner cavity of the housing 15 and is located at the distal end of the housing 15, and the first moving member 13 is disposed at the distal end of the third moving member 14 and is movable in the first direction or the second direction; the proximal end of the first moving member 13 is provided with a first abutting portion 132 extending radially outwards, and the inner wall surface of the housing 15 is provided with a second limiting portion 152 and a first limiting portion 151 corresponding to the proximal end and the distal end of the first moving member 13 respectively.

The firing equipment also comprises a first reset piece 12 sleeved on the outer wall surface of the first moving part 13; the proximal end of the first reset element 12 is abutted against the first abutting part 132 of the proximal end of the first moving part 13, and the distal end is abutted against the first limiting part 151 on the inner wall surface of the shell 15; the first restoring member 12 has a first biasing force directed in the second direction, and in the absence of other external forces, the first abutment 132 at the proximal end of the first moving member 13 abuts against the second limiting portion 152 on the inner wall surface of the housing 15 under the action of the first biasing force of the first restoring member 12, and at this time, the first moving member 13 is in the initial position, and the first restoring member 12 is preferably a compression spring. In this way, the first moving part 13 is kept moving proximally all the time under the action of the first restoring member 12.

As shown in fig. 1, 6 and 7, a base 223 is integrally formed on the inner wall surface of the housing 15, the base 223 being disposed in the inner cavity of the proximal end of the housing 15 and axially located between the first moving member 13 and the knob; the base 223 is provided with a first runner 2231 extending radially along the housing 15 and two second runners 2232 extending axially along the housing 15, the first runner 2231 being provided with an opening at an end facing the third moving member 14.

As shown in fig. 1, 6 and 8, the second moving part 21 is preferably a sliding sleeve, and the second moving part 21 is sleeved on the third moving part 14 and can move along the first direction or the second direction; the proximal end of the second moving member 21 is provided with a second abutting portion 213; the second moving member 21 is provided with guide portions 212 extending in the axial direction thereof on both side wall surfaces perpendicular to the axial direction, respectively, and the two guide portions 212 are slidably disposed in two second slide grooves 2232 provided on the base 223.

The firing device further comprises a third reset piece 221, a third limiting part 153 and a fourth limiting part 154 are respectively arranged on the inner wall surface of the shell 15 between the distal end of the knob and the proximal end of the base 223 from the distal end to the proximal end, one end of the third reset piece 221 sleeved on the third moving part 14 is abutted against the fourth limiting part 154 at the proximal end of the shell 15, the other end is abutted against the second abutting part 213 at the proximal end of the second moving part 21, the third reset piece 221 has a third biasing force along the first direction, and the third biasing force is far smaller than the first biasing force; the second abutment 213 of the second moving member 21 abuts against the third limiting portion 153 without any other external force and only with the third biasing force, and at the same time, the two guide portion distal end surfaces 214 abut against the second chute distal end surface 2233, while the second moving member 21 is in its initial position.

When in the initial position, the first reset piece 12 acts on the first moving part 13, so that the first abutting part 132 of the first moving part 13 abuts against the second limiting part 152; meanwhile, the second abutting portion 213 of the second moving member 21 abuts against the third limiting portion 153 due to the third resetting member 221. Since the operating member 11 is distally connected to said first moving member 13 via said first hinge point 131; connected at a proximal end to said second moving part 21 by means of said second hinge point 31; thus, in the initial state, the operating member 11 can maintain a stable opening angle by the first hinge point 131 and the second hinge point 31.

A limiting area is formed on the wall surface of the second moving part 21 facing the first chute 2231, the limiting area is preferably a first through hole 211, and when the second moving part 21 is at the initial position, the first through hole 211 is opposite to the opening on the first chute 2231; the third restoring member 221 is preferably a compression spring. As shown in fig. 6 to 11, the locking member 224 is slidably disposed in the first chute 2231 along the radial direction of the housing 15, and the locking member 224 includes a mounting portion 2242 disposed opposite to each other and a limiting portion 2244 connected to the mounting portion 2242, where the mounting portion 2242 and the limiting portion 2244 form a mounting cavity 2241, and the mounting portion 2242 and the limiting portion 2244 may be integrally formed. The limiting part 2244 is located at the bottom of the mounting cavity 2241 near one side of the third moving member in the axial direction, and the mounting part 2242 is located at one side away from the third moving member in the axial direction. Such that the locking piece 224 can slide in the first chute 2231 along the "U" shaped side walls of the two ends of the mounting part 2242. A limiting protrusion 2243 is provided at an end of the mounting part 2242 remote from the limiting part 2244, and the limiting protrusion 2243 extends toward the inside of the mounting cavity 2241.

The mounting cavity 2241 has an opening at one end far away from the third moving member 14, and the limiting protrusions 2243 are symmetrically disposed on an inner wall surface of the mounting portion 2242 at the opening, preferably, the limiting protrusions 2243 are integrally formed with the mounting portion 2242. The wall surface of the limit bump 2243 facing the axial side of the third moving member 14 is preferably a first arc surface 2248; a base hole 2234 through which the limiting part 2244 passes is formed on a side wall surface of the first chute 2231, which is close to the axial direction of the third moving part 14, a base wall 2235 is formed at a position, which is far away from the third moving part 14 and is opposite to the base hole 2234, a yielding part 2236 is formed on the base wall 2235, and the shape of the yielding part 2236 is adapted to the shape of the limiting protrusion 2243. In this way, the locking piece 224 is partially accommodated in the first runner 2231. An accommodating space 2239 is provided between the stop tab 2243 and the base wall 2236. Along the axial direction of the housing 15, the two U-shaped side walls of the mounting portion 2242 contact the two inner wall surfaces of the first runner 2231, so that the locking member 224 can slide radially along the housing 15 only in the first runner 2231.

The limiting mechanism further comprises a second resetting piece 222, wherein the second resetting piece 222 is arranged in the first chute 2231 and is positioned in the installation cavity 2241, one end of the second resetting piece is propped against the base wall 2235, and the other end of the second resetting piece is propped against the bottom wall of the installation cavity 2241; the second restoring member 222 has a second biasing force against the locking member 224 in the direction of the third moving member 14, and the second restoring member 222 is preferably a compression spring. The locking member 224 always maintains a tendency to move axially toward the third moving member 14 under the second biasing force.

The defining part 2244 includes a first part 2245 and a second part 2246 integrally formed, the first part 2245 being adapted to be inserted into the first through hole 211 of the second moving member 21 in the initial position; a side wall surface of the first portion 2245 facing the third moving member 14 is an arc surface adapted to an outer wall surface of the third moving member 14.

As shown in fig. 8 and 15, the second moving member 21 is provided with a first through hole 211, and the width of the first through hole 211 is not smaller than the width of the first runner 2231 in the axial direction. In this way, the locking piece 224 can enter the first through hole 211 when the second moving member 21 moves in the axial direction to coincide with the projection of the first runner 2231 in the radial direction.

In the cocked state, the first section 2245 enters the first through hole 211 and the second section 2246 extends into the relief area 141. The longitudinal section of the second part 2246 is trapezoidal, and the short side of the trapezoid is close to one side of the yielding area 141; the length of the long side of the trapezoid is smaller than the length of the first portion 2245 in the axial direction of the housing 15, and the waist of the trapezoid corresponds to the side wall surface of the second portion 2246. The relief area 141 is a flared area corresponding to the shape of the second portion 2246, and a side wall surface of the flared area is a first guiding surface 2247 forming an included angle with the axial direction of the housing 15, and a required buffer gap is reserved between the first guiding surface 2247 and the side wall surface of the second portion 2246.

As shown in fig. 1, the operating member 11 is preferably a handle, one end of which is hinged to the proximal end of the first moving member 13 by a rotation pin, the hinge point is a first hinge point 131, and the other end extends out of the housing 15 through an opening in a side wall of the housing 15, and the shape of the handle is suitable for being held by a hand of a human body.

The proximal end of the handle is further provided with a third hinge point 133, the distal end of the strut 3 is connected to the third hinge point 133, the proximal end of the strut 3 is hinged to the second moving member 21, and the hinge point is the second hinge point 31.

As shown in fig. 1, 3 and 4, the cartridge assembly 17 includes a cartridge 172, a push head 171 and staples, the cartridge 172 is mounted at an opening at a distal end of the housing 15, distal ends of the first moving member 13 and the third moving member 14 extend into an inner cavity at a proximal end of the cartridge 172, and a cartridge and circumferentially distributed staples disposed in the cartridge are disposed at the distal end of the cartridge 172.

The ejector head 171 is slidably disposed within the interior cavity of the cartridge 172 and is preferably configured to mate with the interior cavity of the cartridge 172 with a proximal end thereof connected to the distal end of the first moving member 13, the distal end being in registry with a staple and adapted to eject the staple from the cartridge 172; an annular blade is provided at the distal end of the push head 171 at a position corresponding to the inner ring of the staples.

As shown in fig. 1 and 5, the anvil assembly 18 includes an anvil head 181 and an anvil rod 182, the anvil head 181 being disposed at a distance from the distal end of the cartridge 172 and being in registry with the staples, the proximal end of the anvil head 181 being provided with a recess in registry with each staple; the anvil 181 is preferably a conical-like structure with the bottom of the conical structure at the proximal end and the top at the distal end; the anvil rod 182 is inserted into the interior cavity of the cartridge 172 and the staple pusher 171, and the proximal end of the anvil rod 182 is pinned to the distal end of the third moving member 14, with the distal end of the anvil rod 182 being fixedly attached to the proximal end of the anvil head 181 at a central location.

The anvil head 181 can axially reciprocate along the housing 15 under the drive of the third moving member 14, the push head 171 can axially reciprocate along the housing 15 under the drive of the first moving member 13, when the anvil head 181 is spaced from the staples by a predetermined distance, the push head 171 ejects the staples out of the staple cartridge in the first direction, staples the tissue located between the proximal end of the anvil head 181 and the distal end of the staple cartridge, and simultaneously, the annular blade on the push head 171 cuts off the stapled excess tissue.

As shown in fig. 7 and 12-17, the safety device further includes a secondary firing preventing mechanism, which includes a linkage member 41, a fourth reset member 423, a toggle member 421, and a force receiving member 422.

The link member 41 is axially penetrated in the base 223 along the housing 15 and is made of a material having elasticity by penetrating the accommodation space between the two limit protrusions 2243 and the outer wall surface of the first chute 2231. Specifically, as shown in fig. 6, the proximal end of the base 223 is further provided with a first notch 2238, and the distal end is provided with a second notch 2237, and the first notch 2238 and the second notch 2237 are respectively located at two ends of the first chute 2231 along the axial direction; the linkage member 41 is axially inserted into the accommodating space along the housing 15, and is inserted into the first recess 2238 and the second recess 2237. The arrangement is such that a reliable position of the linkage member 41 within the housing 15 is necessary to obtain a reliable movement.

A fifth limiting part 414 is arranged on the outer wall surface of the proximal end of the linkage part 41; the fourth resetting piece 423 is sleeved at the proximal end of the linkage part 41; the proximal end of the fourth restoring member 423 abuts against the third limiting portion 153, the distal end abuts against the fifth limiting portion 414, and the fourth restoring member 423 has a fourth biasing force along the first direction. A concave part 411 is arranged on the surface of one side of the linkage part 41 facing away from the third moving part 14, and convex parts 412 are correspondingly arranged at two ends of the concave part 411; under no other external force, only under the action of the fourth biasing force, the fifth limiting portion 414 of the proximal end of the linkage member 41 abuts against the proximal outer wall surface of the first runner 2231, and under the elastic action of the linkage member 41 itself, the distal end of the linkage member 41 has a movement tendency in the radial direction of the housing 15 toward the third movement member 14.

The concave part 411 on the linkage member 41 is opposite to the limit protrusion 2243 on the locking member 224, meanwhile, the distal end of the linkage member 41 is abutted against the proximal side wall surface of the first moving member 13 along the radial direction of the housing 15, at this time, the linkage member 41 is in the third position, the convex part 412 on the distal end of the linkage member 41 is connected with the concave part 411 through the inclined second guide surface 413, and the second guide surface 413 is suitable for contacting with the first arc surface 2248 on the limit protrusion 2243.

As shown in fig. 13 and 16, the force-receiving member 422 is integrally formed on the linkage member 41 and located between the proximal end of the first moving member 13 and the distal end of the base 223, and the force-receiving member 422 is preferably a semi-circular arc-shaped protrusion toward the third moving member 14; the third moving part 14 is located at the distal end of the yielding area 141 and is a stirring part 421 corresponding to the stress part 422, a groove is arranged at the distal end of the stirring part 421, a side wall surface at the distal end of the stirring part 421 is a third guiding surface 425 forming an angle with the axial direction of the shell 15, and the third guiding surface 425 is suitable for contacting with the arc-shaped surface of the stress part 422.

As shown in fig. 14-17, when the stapler is in the initial state as shown in fig. 14, the first moving member 13 is in its initial position, the second moving member 21 is in its initial position, and the linkage member 41 is in the third position; the relief area 141 is offset from the first through hole 211 and the first chute 2231 and is located on a side of the first chute 2231 near the distal end of the housing 15, where the third moving member 14 is in the second position, and the second portion 2246 of the locking member 224 abuts against the outer wall surface of the third moving member 14, and both the mounting portion 2242 of the locking member 224 and the first portion 2245 of the defining portion 2244 are located in the first chute 2231.

Since the length of the second portion 2246 in the axial direction of the housing 15 is smaller than the first portion 2245 and the first biasing force is much larger than the third biasing force, the second moving member 21 is in a moving state of a changeable position with respect to the housing 15 at this time, and correspondingly the second hinge point 31 is in a free state, and the first hinge point 131 is in a fixed state with respect to the housing 15; when the operator presses the handle, the handle takes the first hinge point 131 as a rotating fulcrum, the second moving part 21 is driven to move along the second direction through the supporting rod 3, at this time, the safety function of the limiting mechanism is in a starting state, and the anastomat is in a firing failure state as shown in fig. 14.

When the anastomat is in the firing failure state, the handle, the supporting rod 3 and the second moving part 21 are in the movable state, and compared with other structures for realizing the firing failure function by locking the handle position, the anastomat can avoid the condition that the handle is forced to move by excessive external force to damage the limiting mechanism and even the structure of the anastomat when the safety function of the limiting mechanism is started.

After the tissue to be anastomosed is arranged, an operator rotates the knob clockwise, and the third moving part 14 drives the nail anvil 181 to move along the second direction until the abdication area 141 is opposite to the first through hole 211 and the first chute 2231, and at the moment, the third moving part 14 is positioned at the first position; the locking member 224 moves toward the third moving member 14 under the action of the second biasing force, the first portion 2245 is inserted into the first through hole 211, the second portion 2246 extends into the yielding area 141, and the mounting portion 2242 is located in the first chute 2231.

At this time, the second moving part 21 is in a fixed state fixed relative to the housing 15 under the action of the locking member 224, correspondingly, the second hinge point 31 is fixed relative to the housing 15, the first hinge point 131 is in a free state, the safety function of the limiting mechanism is in a closed state, the stapler is in a to-be-fired state as shown in fig. 15, and the gap between the anvil head 181 and the staple cartridge 172 is a preset optimal anastomosis gap.

As shown in fig. 18, the relief area 141 has a certain width in the axial direction, the width of the second portion 2246 in the axial direction is smaller than the width of the relief area 141 in the axial direction, the difference between the axial width of the second portion 2246 and the axial width of the relief area 141 is L, and L is an adjustable distance when the tissue is closed. When second portion 2246 has just entered yield area 141, i.e., second portion 2246 is distally adjacent to yield area 141, the tissue closure gap is minimal; as the knob moves the third moving member 14, the tissue closing gap is maximized when the second portion 2246 is proximal to the yield area 141. L is preferably 2mm.

If the operator wants to adjust the tissue position between the anvil 181 and the cylinder 172 when the stapler is in the ready-to-fire state, the operator can rotate the knob counterclockwise to drive the third moving member 14 and drive the anvil 181 to move in the first direction, so that the anvil 181 is far away from the cylinder 172, and the closing gap is enlarged, or rotate the knob clockwise to drive the third moving member 14 and drive the anvil 181 to move in the second direction, so that the anvil 181 is close to the cylinder 172, and the closing gap is reduced.

The second part 2246 and the relief area 141 are arranged in a guiding manner, and the side wall surface of the second part 2246 along the axial direction is preferably an inclined surface. When the knob is rotated counterclockwise, the third moving member 14 moves toward the second direction, the first guiding surface 2247 of the yielding area 141 abuts against the corresponding sidewall surface of the second portion 2246 and ejects the second portion 2246 out of the yielding area 141, and the third moving member 14 returns to the second position; so that the second part 2246 on the locking member 224 is restored to a state of abutting against the outer wall surface of the third moving member 14, the first part 2245 on the locking member 224 and the mounting part 2242 are restored to a state of being located in the first chute 2231, that is, after the base 223 and the second moving member 21 are separated from the limitation of the locking member 224, the safety function of the limiting mechanism is opened again, the stapler is reset to the firing failure state as shown in fig. 14, and the stapler can realize the automatic switching between the starting and closing of the safety function of the limiting mechanism by rotating the knob assembly, so that the flexibility is good.

When the stapler is in the cocked state as shown in fig. 15, that is, the locking member 224 passes through the base 223 and the second moving member 21 at the same time, the second portion 2246 enters the yielding area 141, at this time, the operator presses the handle, and the handle uses the second hinge point 31 as a rotation pivot to drive the first moving member 13 to drive the push head 171 to move along the first direction, at this time, the first moving member 13 is in the active position, and the handle continues to press the handle, so that the handle continues to drive the first moving member 13 to drive the push head 171 to move along the first direction until the firing is completed. In the process, the first moving part 13 moves from the starting position to the active position and compresses the first restoring member 12; meanwhile, since the distal end of the linkage member 41 abuts against the proximal end of the first moving member 13 in the radial direction, when the first moving member 13 moves to the distal end, the distal end of the linkage member 41 moves towards the third moving member 14 in the radial direction of the housing under the elastic action of the distal end, from the third position shown in fig. 15 to the fourth position shown in fig. 16, that is, the distal end of the linkage member 41 is separated from the proximal end of the first moving member 13 and returns to the free state, the distal end face of the linkage member 41 and the proximal end face of the first moving member 13 are axially opposite to each other along the housing 15 with a certain gap therebetween, which is smaller than the interval between the starting position and the acting position of the first moving member 13, and the arc surface of the force-receiving member 422 abuts against the recess at the distal end of the toggle member 421, at which time the linkage member 41 is in the fourth position.

After the anastomosis operation of the tissues is completed, the operator releases the handle, the first moving part 13 is restored to the initial position from the acting position under the action of the first biasing force of the first restoring member 12, and at the same time, the first moving part 13 drives the whole linkage part 41 to move along the second direction, and finally drives the distal end of the linkage part 41 to axially abut against the proximal end of the first moving part 13 and further compresses the fourth restoring member 423; the second guiding surface 413 on the linkage member 41 abuts against the first arc surface 2248 of the limit protrusion 2243 on the mounting portion 2242 and drives the limit protrusion 2243 to move away from the yielding area 141, so as to drive the second portion 2246 to leave the yielding area 141, so that the first portion 2245 enters the first chute 2231, the second moving member 21 is changed from the fixed state to the moving state, that is, the protruding portion 412 acts on the locking member 224, so that the locking member 224 is separated from the second moving member 21 in the direction away from the axial direction, correspondingly, the secondary firing preventing mechanism of the limit mechanism is started, and the stapler is in the firing failure state as shown in fig. 17.

The anastomat can automatically start the safety function of the limiting mechanism after the operator performs the first firing, and the anastomat automatically enters the firing failure state, so that the occurrence of the condition that the anastomat is fired again to cause the failure of the anastomosis operation due to the fact that the handle is touched by mistake after the anastomosis operation is finished can be completely avoided, and the reliability is high.

When the linkage member 41 is in the fourth position, the operator can rotate the knob counterclockwise to drive the third moving member 14 to move along the first direction, at this time, the third guiding surface 425 of the toggle member 421 abuts against the arc surface of the force receiving member 422, and the third guiding surface 425 may be an inclined surface, so that the distal end of the linkage member 41 moves away from the proximal end of the first moving member 13 in a direction away from the axial direction, and drives the distal end of the linkage member 41 to move away from the third moving member 14, and meanwhile, under the action of the fourth reset member 423, the linkage member 41 is restored to the third position, at this time, the yielding region 141 is also staggered with the first chute 2231 and the first through hole 211, and the stapler is restored to the initial state as shown in fig. 12, that is, the firing failure state.

The anastomat can perform experimental firing test on firing equipment and safety functions of a limiting mechanism before operation, test whether the functions of the anastomat are normal and reliable, reset the anastomat to an initial state after the test is finished, and reliability test before operation is very important to ensure successful operation.

Example 2

The present embodiment provides a firing device, which differs from the structure of the firing device provided in embodiment 1 only in that the housing 15, the staple cartridge 172 and the anvil 181 may have other shapes, the specific structure being determined by the use environment, for example, the housing 15 and the staple cartridge 172 may have a circular tube structure with a certain curvature, and be more suitable for extending into the tubular tissue;

as a further alternative embodiment, the anvil head 181 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 is different from the structure of the firing device provided in embodiment 1 or 2 only in that the striking member 421 is a striking pin slidably disposed on the wall surface of the housing 15, one end of the striking member 421 is located outside the housing 15 and is suitable for manual control by an operator, and the other end of the striking member is located in the inner cavity of the housing 15, and the force-receiving member 422 is driven by the manual control of the striking pin by the operator, so that the linkage member 41 is driven to return from the fourth position to the third position together with the fourth reset member 423;

as a further alternative embodiment, the fourth restoring member 423 may not be provided, and the linkage member 41 may be restored to the third position by the sole action of the toggle member 421;

As a further alternative embodiment, the linkage member 41 may be made of a non-elastic material, in which case the linkage member 41 includes a first linkage block fixed to the base 223 and a second linkage block slidably disposed on the first linkage block, the protrusion 412 and the recess 411 being located on the second linkage block, and a compression spring having a biasing force inclined at an angle with respect to the first direction toward the third moving member 14 being provided on a distal end of the second linkage block.

Example 4

The present embodiment provides a firing apparatus that differs from the structure of the firing apparatus provided in any of embodiments 1-3 only in that no secondary firing mechanism may be provided, and at this time, the stapler does not have a function of preventing false firing again after the first firing.

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 portion 2246 of the locking member 224 may be a hemispherical configuration with the arcuate surface facing the second moving member;

As a further alternative, the sidewall surface of the relief area 141 may be an outwardly convex arcuate surface;

As a further alternative embodiment, the sidewall surface of the yielding area 141 corresponding to the second portion 2246 is a straight surface along the radial direction of the housing 15, and when the second portion 2246 is located in the yielding area 141, the third moving member 14 is in a fixed state relative to the housing 15 under the action of the locking piece 224, and the knob cannot be turned to drive the third moving member 14 to move.

Example 6

This embodiment provides a firing device that differs from the structure of the firing device provided in any of embodiments 1-5 only in that the third restoring member 221 may not generate a third biasing force when the second moving member 21 is in its initial position, and the third restoring member 221 may generate a third biasing force when the second moving member 21 moves in the second direction;

As a further alternative embodiment, the second restoring member 221 may not be provided, and the operator manually drives the first through hole 211 of the second moving member 21 to face the first chute 2231 by using a handle.

Example 7

This embodiment provides a firing device that differs from the structure of the firing device provided in any of embodiments 1-6 only in that the driver 16 may not be provided, and the operator manually controls the movement of the third moving member 14 and temporarily fixes the position by a set screw that passes through the wall of the housing 15 and abuts against the outer wall of the third moving member 14.

Example 8

This embodiment provides a firing device that differs from the structure of the firing device provided in any of embodiments 1-7 only in that the base 223 is integrally formed on either the left or right housing.

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;

A first moving part (13) slidably arranged between a starting position and an active position with respect to the base frame;

an operating member (11) having an abutment point for applying a force to the first moving member (13) toward the acting position;

The method is characterized in that: and also comprises

A second moving member (21) provided so as to be switched between a fixed state and a moving state with respect to the base frame, the second moving member (21) being in contact with the operating member (11); in the fixed state, the second moving member (21) constitutes a fulcrum of the operating member (11); in the moving state, the first moving member (13) constitutes a fulcrum of the operating member (11);

one end of the operating component (11) is hinged with the first moving component (13), and a first hinge point (131) is formed on the first moving component (13);

the device also comprises a support rod (3), wherein two ends of the support rod are hinged with the operating part (11) and the second moving part (21), and a second hinge point (31) is formed on the second moving part (21);

A first supporting part (132) is arranged at one end of the first moving part (13) facing the second moving part (21), and a second limiting part (152) is arranged on the inner wall surface of the base frame;

When the first abutting part (132) of the first moving part (13) abuts against the second limiting part (152) of the base frame, the first moving part (13) is at the starting position;

When the operating part (11) takes the second hinging point (31) as a rotating fulcrum to drive the first moving part (13) to move in a direction away from the second moving part (21), the first moving part (13) is in the acting position.

2. The firing apparatus of claim 1, wherein the firing apparatus further comprises:

A stopper mechanism that locks the second moving member (21) in the fixed state; in the moving state, the second moving member (21) is unlocked.

3. The firing apparatus of claim 2, wherein the limit mechanism comprises: the limiting area is arranged on the second moving part (21);

a locking member (224) slidably provided on the base frame in a sliding direction intersecting the second moving member (21);

the locking piece (224) enters the limit area or is separated from the limit area under the driving of external force.

4. A firing device according to claim 3, characterized in that said limit area is a first through hole (211) open on said second moving part (21).

5. The firing apparatus of claim 4, wherein the stop mechanism further comprises:

A third moving member (14) slidably disposed between a first position and a second position relative to the base frame;

A yielding area (141) corresponding to the first through hole (211) is formed on the side wall of the third moving part (14);

In the fixed state, one end of the locking piece (224) facing the yielding area (141) is inserted into the first through hole (211) and extends into the yielding area (141).

6. The firing apparatus of claim 5, wherein the stop mechanism further comprises a second reset member (222) disposed between the lockout member (224) and the base frame, the second reset member (222) applying a second biasing force to the lockout member (224) toward the yield region (141).

7. The firing apparatus of claim 6, wherein the lockout (224) includes a mounting portion (2242) and a defining portion (2244) cooperable with the first through hole (211) and the yield region (141).

8. The firing apparatus of claim 7, wherein the yield zone (141) comprises at least one obliquely disposed first guide surface (2247); the third moving part (14) is pushed out of the yielding zone (141) along the first guiding surface (2247) when sliding towards the second position.

9. The firing apparatus of claim 5, further comprising:

a first reset piece (12) sleeved on the first moving part (13) and used for applying a first biasing force to the first moving part (13) towards one side of the second moving part (21);

a third reset piece (221) sleeved on the third moving part (14) and propped against the second moving part (21) to apply a third biasing force to the second moving part (21) towards the first moving part (13);

The third biasing force is less than the first biasing force.

10. The firing device according to claim 5, further comprising a secondary firing prevention mechanism for switching the second moving member (21) from the fixed state to the moving state when the first moving member (13) is reset from the active position to the starting position.

11. The firing apparatus of claim 10, wherein the anti-secondary firing mechanism comprises:

A linkage member (41) movably disposed between a third position and a fourth position with respect to the base frame, one end of the linkage member (41) being disposed in linkage with the locking piece (224);

In the fourth position, the linkage member (41) drives the locking piece (224) to be separated from the yielding area (141); when the third moving part (14) slides towards the second position, the third moving part (14) drives the linkage part (41) to return to the third position.

12. The firing apparatus according to claim 11, wherein the lock (224) is provided with a mounting cavity (2241) extending in the sliding direction of the second moving member (21), the linkage member (41) penetrating inside the mounting cavity (2241),

The linkage part (41) comprises a concave part (411) and a convex part (412) which is arranged on the concave part (411) and is close to the first moving part (13), and the concave part (411) is in transitional connection with the convex part (412) through an inclined second guide surface (413).

13. The firing device according to claim 12, characterized in that in the third position, the other end of the linkage member (41) radially overlaps the side wall surface of one end of the first moving member (13) along a base frame; in the active position, the other end of the linkage member (41) is disengaged from the one end of the first moving member (13).

14. The firing apparatus of claim 13, wherein the secondary firing prevention mechanism further comprises a toggle member (421) disposed on the third moving member (14), and a force receiving member (422) disposed on the linkage member (41); when the third moving part (14) slides towards the second position, the stirring piece (421) drives the stress piece (422) to drive the linkage part (41) to reset to the third position.

15. The firing apparatus of claim 14, wherein the secondary firing prevention mechanism further comprises a fourth reset member (423) disposed on the base frame and abutting the linkage member (41), the fourth reset member (423) applying a fourth biasing force to the linkage member (41) in a direction toward the first moving member (13).

16. The firing apparatus according to claim 15, wherein the linkage member (41) is made of an elastic material.