CN109953791B

CN109953791B - Handle assembly and anastomat comprising same

Info

Publication number: CN109953791B
Application number: CN201711434954.3A
Authority: CN
Inventors: 陈志�
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2024-03-15
Anticipated expiration: 2037-12-26
Also published as: CN109953791A

Abstract

The invention provides a handle assembly and an anastomat comprising the same, wherein the handle assembly comprises a first handle and a second handle, and the first handle can rotate relative to the second handle; the first handle and the second handle are in a non-linkage state, and when the first handle rotates along the first direction, the second handle does not rotate, so that the anastomat cannot be fired; when the first handle rotates along a first direction, the first handle drives the second handle to rotate along the first direction so as to fire the anastomat. The handle assembly is divided into the first handle and the second handle, and only the movement of the second handle can trigger the anastomat to execute cutting and stitching actions; during the use, no matter whether the anastomat reaches the triggerable position or not, a doctor can press the first handle, however, when the anastomat does not reach the triggerable state, the first handle does not drive the second handle, and the anastomat cannot be triggered.

Description

Handle assembly and anastomat comprising same

Technical Field

The invention relates to the technical field of medical instruments, in particular to the technical field of anastomat, and particularly relates to a handle assembly and an anastomat comprising the same.

Background

Digestive tract tumor is one of the diseases of human high incidence, and in the treatment process, a circular tube type anastomat is often used for anastomosing physiological tissues such as digestive tract and the like instead of manual operation of doctors. The circular tube type anastomat is a common surgical instrument, and most of the circular tube type anastomat adopts an axial inner stapling mode, forms end-to-end or end-to-side anastomosis on physiological tissues such as esophagus, stomach, intestinal canal and the like during operation, is accommodated in the anastomat in a astringing way during anastomosis, forms a circular anastomosis opening on the tissues after the completion of percussion, and reconstructs a tissue channel.

In the prior art, the circular tube type anastomat comprises an anastomat body, a handle component movably connected with the anastomat body and a nail anvil component matched with the body. The anastomat body comprises a nail bin assembly arranged at the far end, and the nail bin assembly comprises an annular nail bin and a cutter; and a knob disposed at the proximal end of the body, the knob being rotatable relative to the body. The distal and proximal ends are here the proximal ends with respect to the operator, the ends closer to the operator being the proximal ends, the ends further from the operator, i.e. the ends closer to the surgical site being the distal ends. The nail anvil assembly comprises a nail anvil, a nail anvil cap arranged at the top of the nail anvil, a knife anvil arranged inside the nail anvil and a nail anvil shaft detachably connected with the anastomat body. In the operation process, after tumor tissues are removed by separation, the nail anvil shaft penetrates out of a purse at one end of the tissues and is configured at the far end of the anastomat body, and the knob is rotated, so that the distance between the nail anvil and the nail bin is gradually reduced to reach a proper distance, and then the nail anvil is in a triggerable state, and the handle triggering instrument can be held to complete anastomosis. Along with the continuous development of medical instruments, the circular tube type anastomat is also widely applied to the treatment of hemorrhoids and other diseases.

Meanwhile, in the operation of treating the overlong foreskin and phimosis in the field of urology surgery, another type of circular tube type anastomat, namely a foreskin anastomat, is also appeared. Foreskin staplers are also described in the prior art, which are structurally similar to the circular tubular staplers of the alimentary tract described above, except that a glans cap assembly is fitted with the body. Similarly, the glans cap assembly comprises a nail anvil, a glans cap fixedly connected with the nail anvil, a knife anvil and a center rod detachably connected with the anastomat body. In the operation process, foreskin tissues to be resected are fixed on a glans cap, then a center rod is arranged at the far end of the anastomat body, and a knob is rotated to gradually reduce the distance between the glans cap and a nail bin to a proper distance, so that the glans cap and the nail bin can be in a percussion state, and a handle percussion instrument can be held to complete anastomosis.

With the development of technology, the firing transmission mechanism of the circular tube type anastomat has been improved, and a safety mechanism is added, so that even if a doctor presses a handle when the anastomat does not reach a triggerable state, the handle can not be pressed due to the action of the safety mechanism, thereby avoiding operation failure caused by instrument firing. However, in practice, there are still some drawbacks, such as a poor experience for the doctor, and in addition, if the doctor presses the handle with force, the casing of the stapler may be cracked.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide a handle assembly and an anastomat comprising the same, wherein a doctor can press a first handle no matter whether the anastomat reaches a cocked position or not, however, when the anastomat does not reach the cocked state, the first handle can not fire the anastomat through a second handle, so that the anastomat damage possibly caused by forcefully pressing the handles can be avoided.

The embodiment of the invention provides a handle assembly, which is used for firing an anastomat, and comprises a first handle and a second handle, wherein the first handle can rotate along a first direction under external force, the second handle can fire the anastomat when rotating along the first direction, and the first handle and the second handle have a linkage state and an unlink state;

the first handle and the second handle are in an unlink state, and when the first handle rotates along a first direction, the second handle does not rotate and the anastomat cannot be triggered;

the first handle and the second handle are in a linkage state, and when the first handle rotates along a first direction, the first handle drives the second handle to rotate along the first direction so as to fire the anastomat.

Optionally, the first end of the first handle is a holding end, and the second end of the first handle is rotatably connected with the first end of the second handle; when the second handle rotates in a first direction, the second end of the second handle pushes the staple pushing rod of the stapler to fire the stapler.

Optionally, the first handle and the second handle rotate about the same center or the first handle and the second handle rotate about two centers.

Optionally, the handle assembly further comprises:

a pointer movable between a first location area and a second location area;

an elastic part, which is positioned on the first handle, and when the pointer moves from the first position area to the second position area, the pointer contacts with the elastic part and drives the elastic part to enter a second state from a first state;

when the elastic part is in a first state and the first handle rotates along a first direction, the elastic part does not collide with the second handle, and the second handle is in a safety position;

when the elastic part is in the second state and the first handle rotates along the first direction, the elastic part is in contact with the second handle and drives the second handle to move from the safety position to the firing position.

Optionally, the pointer is connected to the distal end of the pull tab, the proximal end of the pull tab is sleeved on the screw rod, the proximal end of the screw rod is provided with a knob, the knob is rotated to drive the pull tab to move towards the proximal end, and the pull tab drives the pointer to move from the first position area to the second position area.

Optionally, the first handle is rotatably connected with the second handle through a first pin shaft, and the second handle is rotatably connected with the housing of the anastomat through a second pin shaft.

Optionally, a first torsion spring and a second torsion spring are respectively sleeved on the first pin shaft and the second pin shaft, two ends of the first torsion spring are respectively abutted to the first handle and the second handle, and two ends of the second torsion spring are respectively abutted to the second handle and the casing of the anastomat.

Optionally, the elastic part is an elastic cavity with two side walls, and the pointer drives the elastic cavity to enter the expansion state from the contraction state when entering the interior from the exterior of the elastic cavity.

Optionally, the first end of the second handle is provided with a second cavity; when the first handle rotates along the first direction, the elastic cavity in the contracted state can at least enter the second cavity, the side wall end face of the elastic cavity in the expanded state is in contact with the side wall end face of the second cavity, and the elastic part is prevented from continuously entering the second cavity.

Optionally, the side wall end surface of the elastic cavity is a first guide surface having an angle smaller than 90 ° with the side wall of the elastic cavity, and the side wall end surface of the second cavity is a second guide surface parallel to the first guide surface.

Optionally, the elastic cavity includes conflict section, protruding section and direction section, protruding section is located conflict section with between the direction section, protruding section's lateral wall interval is less than the width of pointer, the lateral wall interval of the tip of direction section is greater than the width of pointer, in order to guide the pointer gets into protruding section.

Optionally, the conflict section, protruding section and the direction section integrated into one piece of elasticity cavity, just the lateral wall of elasticity cavity is followed protruding section smooth transition extremely the direction section.

Optionally, the second end of the first handle has a first cavity, and the elastic cavity and the first cavity are integrally formed and mutually communicated.

Optionally, the elastic cavity comprises an abutting section and an elastic section, the second end of the first handle is provided with a first cavity, the elastic section is inserted into the first cavity, and the side wall end face of the abutting section is positioned outside the first cavity;

When the pointer enters the elastic section from the outside of the elastic section, the side walls of the two sides of the elastic section and the abutting section are expanded to the two sides.

Optionally, the elastic cavity further comprises a connection section, the elastic section is located between the abutting section and the connection section, the connection section is inserted into the first cavity, and the connection section is fixed to the first cavity through a fastener.

Optionally, the pointer is rotatably fixed to the inside of the housing of the stapler, the pointer rotates from the outside to the inside of the elastic cavity in a second direction, and the first direction and the second direction are opposite directions.

Optionally, the elastic part includes a spring plate, and when the pointer moves from the first position area to the second position area, the pointer pushes the spring plate to incline to one side, so that when the first handle rotates along the first direction, the spring plate is abutted against the second handle.

Optionally, the first handle includes a first cavity having two side walls, and the handle assembly further includes:

a pointer movable between a first location area and a second location area;

the sliding groove comprises a first section and a second section which are communicated, the sliding groove is positioned on the first handle, the sliding block comprises two sliding parts and a sliding block guiding part between the sliding parts, the two sliding parts are respectively and slidably embedded in the corresponding sliding grooves, and a sliding block reset torsion spring is arranged between the sliding block and the second handle; when the pointer moves from the first position area to the second position area, the sliding block is driven to move from the first section of the sliding groove to the second section of the sliding groove, so that the sliding block reset torsion spring deforms;

When the sliding block is positioned at the first section of the sliding groove and the first handle rotates along the first direction, the sliding block does not collide with the second handle, and the second handle is positioned at a safety position;

when the sliding block is positioned at the second section of the sliding groove and the first handle rotates along the first direction, the sliding block guide part is in contact with the second handle and drives the second handle to move from the safety position to the firing position.

Optionally, the second handle includes a second cavity having two side walls, the handle assembly further comprising:

a pointer movable between a first position region and a second position region, and a link having a first end connected to the pointer;

the sliding grooves are respectively positioned on the side walls of the two sides of the second cavity, the sliding blocks comprise two sliding parts and a sliding block guiding part between the sliding parts, the sliding parts can respectively move in one sliding groove, the second end of the connecting rod is connected with the sliding blocks, and a sliding block reset torsion spring is arranged between the sliding blocks and the first handle; when the pointer moves from the first position area to the second position area, the pointer drives the sliding block to move from the first section of the sliding groove to the second section of the sliding groove through the connecting rod, so that the sliding block reset torsion spring deforms;

When the sliding block is positioned at the first section of the sliding groove and the first handle rotates along the first direction, the first handle is not in contact with the sliding block, and the second handle is positioned at a safety position;

when the sliding block is positioned at the second section of the sliding groove and the first handle rotates along the first direction, the first handle is abutted against the sliding block guide part and drives the second handle to move from the safety position to the firing position.

Optionally, the device further comprises a first pin shaft penetrating the first handle and the second handle, and the first handle and the second handle can rotate around the first pin shaft.

The embodiment of the invention also provides an anastomat, which comprises the handle assembly.

The handle assembly and the anastomat comprising the same provided by the invention have the following advantages:

the invention provides a handle assembly and an anastomat comprising the same, wherein the handle assembly is divided into a first handle and a second handle, and only the movement of the second handle can trigger the anastomat to execute cutting and stitching actions; in the use, no matter whether the anastomat reaches the triggerable position, a doctor can press the first handle, however, when the anastomat does not reach the triggerable state, the first handle can not drive the second handle, and the anastomat can not be triggered, and the doctor can judge the triggerable state through operation experience, and only when the anastomat reaches the triggerable state, the movement of the first handle can drive the movement of the second handle, so that the anastomat can be triggered, thereby avoiding the damage to the anastomat possibly caused by forcefully pressing the handle, and improving the use experience of the doctor.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.

FIG. 1 is a schematic view of a handle assembly for a stapler according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a circular tube-type stapler according to a first embodiment of the present invention;

fig. 3 is a schematic view of a handle assembly for a ferrule stapler according to a first embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 1 in accordance with the present invention;

FIG. 5 is a schematic view of the structure of the handle assembly with the first handle not depressed when the pointer of the first embodiment of the present invention is located outside the elastic portion;

FIG. 6 is a cross-sectional view taken along the direction A1-A1 in FIG. 5;

FIG. 7 is a cross-sectional view taken in the direction B-B of FIG. 5;

FIG. 8 is a cross-sectional view taken along the direction C1-C1 in FIG. 5;

FIG. 9 is a schematic view of the handle assembly with the first handle depressed when the pointer of the first embodiment of the present invention is outside the elastic portion;

FIG. 10 is a cross-sectional view taken along the direction A2-A2 in FIG. 9;

FIG. 11 is a schematic view of the handle assembly with the first handle not depressed when the pointer of the first embodiment of the present invention is positioned within the resilient portion;

FIG. 12 is a cross-sectional view taken along the direction A3-A3 in FIG. 11;

FIG. 13 is a cross-sectional view taken along the direction C2-C2 in FIG. 11;

FIG. 14 is a schematic view of the handle assembly of the first embodiment of the present invention with the pointer positioned within the resilient portion and the first handle depressed;

FIG. 15 is a cross-sectional view taken along the direction A4-A4 in FIG. 14;

fig. 16 is a front view of an elastic portion of a second embodiment of the present invention;

FIG. 17 is a side view of a resilient portion of a second embodiment of the present invention;

FIG. 18 is a schematic view of the handle assembly with the first handle not depressed when the pointer of the second embodiment of the present invention is outside the resilient portion;

FIG. 19 is a cross-sectional view taken along the direction D1-D1 in FIG. 18;

fig. 20 is a schematic view showing the structure of the first handle pressing when the pointer of the second embodiment of the present invention is located outside the elastic part;

FIG. 21 is a cross-sectional view taken along the direction D2-D2 in FIG. 20;

FIG. 22 is a schematic view of the handle assembly with the first handle not depressed when the pointer of the second embodiment of the present invention is positioned within the resilient portion;

FIG. 23 is a cross-sectional view taken along the direction D3-D3 in FIG. 22;

FIG. 24 is a schematic view of a handle assembly with a first handle pressed when the pointer of the second embodiment of the present invention is located within the elastic portion;

FIG. 25 is a cross-sectional view taken in the direction D4-D4 of FIG. 24;

FIG. 26 is a schematic view of the structure of the elastic portion of the handle assembly of the third embodiment of the present invention in a first state;

FIG. 27 is a schematic view of the structure of the elastic portion of the handle assembly in the second state according to the third embodiment of the present invention;

FIG. 28 is a schematic view of the handle assembly of the fourth embodiment of the present invention in an initial state;

FIG. 29 is a perspective view of a handle assembly according to a fourth embodiment of the present invention;

FIG. 30 is a schematic view of a slider according to a fourth embodiment of the present invention;

FIG. 31 is a schematic view of the handle assembly of the fourth embodiment of the present invention in a disabled state;

FIGS. 32 and 33 are schematic views of a handle assembly of a fourth embodiment of the present invention in a fired state;

FIG. 34 is a schematic view showing the structure of a handle assembly according to a fifth embodiment of the present invention in an initial state;

FIG. 35 is a schematic view of the structure of the handle assembly of the fifth embodiment of the present invention in a disabled state;

FIG. 36 is a schematic view of the handle assembly of the fifth embodiment of the present invention in a fired state;

fig. 37 is a schematic structural view of a handle assembly according to a sixth embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.

The present invention provides a new handle assembly for firing of a stapler. In order to achieve the above object, the present invention divides a handle assembly into a first handle 1 and a second handle 2, the first handle being rotatable by an external force, but the stapler can be fired only when the second handle 2 is rotated in a specific direction. Wherein, the first handle and the second handle have a linkage state and an unlink state. The first handle and the second handle are in an unlink state, and when the first handle rotates along a first direction, the second handle does not rotate and the anastomat cannot be triggered; the first handle and the second handle are in a linkage state, and when the first handle rotates along a first direction, the first handle drives the second handle to rotate along the first direction so as to fire the anastomat.

Therefore, by dividing the handle assembly into a first handle and a second handle, only the movement of the second handle can trigger the anastomat to execute cutting and suturing actions; during the use, no matter whether the anastomat reaches the triggerable position or not, a doctor can press the first handle, however, when the anastomat does not reach the triggerable state, the first handle does not drive the second handle, and the anastomat cannot be triggered.

The structure of the handle assembly of the present invention is further described in connection with several specific embodiments. It is to be understood that the following description is intended to better illustrate the structure and operation of the handle assembly of the present invention, and is intended as a preferred embodiment of the handle assembly of the present invention, and not as a limitation on the scope of the present invention.

First embodiment

As shown in fig. 1, in this embodiment, the handle assembly further includes a pointer 4 for controlling the linkage state of the first handle 1 and the second handle 2. Wherein:

the pointer 4 is provided with a first end 41, a second end 42 and a fixed end 43, the second end 42 of the pointer 4 is associated with the distal end of the pull tab, the proximal end of the pull tab is sleeved on the screw rod, and the proximal end of the screw rod is connected with the knob. The knob is rotated, so that the pull tab drives the second end 42 of the pointer to move between the first position area and the second position area, wherein a window is arranged on the anastomat body corresponding to the first position area and the second position area and is used for observing the position of the second end 42 of the pointer in the use process, the second end 42 of the pointer is in a safety state when in the first position area, at the moment, the anastomat cannot fire, and when the second end 42 of the pointer is in the second position area, the anastomat can fire, so that the corresponding second position area L on the window is a green area for more intuitively prompting a doctor, and the prior art has been disclosed;

The first handle 1 is provided with an elastic portion 3; when the second end 42 of the pointer 4 moves from the first position area to the second position area, the first end 41 of the pointer 4 contacts the elastic portion 3 and drives the elastic portion 3 to enter a second state from a first state, wherein the first state is a state before the elastic portion 3 is not contacted with the pointer 4, and the second state is a state when the elastic portion 3 is contacted with the pointer 4;

when the elastic part 3 is in a first state and the first handle 1 rotates along a first direction, the elastic part 3 does not collide with the second handle 2, and the second handle 2 is in a safety position, namely, the anastomat is not triggered; when the elastic part 3 is in the second state and the first handle 1 rotates along the first direction, the elastic part 3 collides with the second handle 2 and drives the second handle 2 to move from the safety position to the firing position, namely, in the state, the elastic part 3 can push the second handle 2 to fire the anastomat. In fig. 1, the first direction is counterclockwise.

The movement of the first handle 1 with the second end 42 of the pointer 4 in the first and second position areas affects the second handle 2 differently. When the second end 42 of the pointer 4 is in the first position area, the elastic part 3 is in the first state, and the elastic part 3 is not contacted with the second handle 2 in the moving process, so that acting force can not be generated on the second handle 2, the second handle 2 still keeps in the initial state, and the instrument is not driven to be fired; when the second end 42 of the pointer 4 is in the second position area, the elastic part 3 is in the second state, and when the elastic part 3 rotates along with the rotation of the first handle 1, the second handle 2 is pushed to move, that is, the second handle 2 is driven to drive the instrument to fire. Thus, by changing the position of the pointer 4, the mutual fitting relationship of the first handle 1 and the second handle 2 can be controlled.

In summary, when the stapler is not ready for firing, the second end 42 of the pointer 4 is in the first position region, at which time the surgeon can easily rotate the first handle 1 if holding the first handle 1, but will not trigger the second handle 2, because the force holding the first handle is very small when in the empty firing state. The doctor can also know that the state of the current anastomat is in an unfired state through the operation experience, and the shell of the anastomat cannot be broken; when the stapler is ready for firing, the second end 42 of the pointer 4 is in the second position, i.e. the region that can be fired. At this time, the doctor holds the first handle 1, and the movement of the first handle 1 drives the movement of the second handle 2, so as to drive the percussion anastomat.

Fig. 2 is a schematic view showing a handle assembly applied to a stapler according to a first embodiment of the present invention, wherein a circular tube type stapler is shown. One end of the stapler comprises a cartridge assembly 72 and an anvil assembly 73 which cooperate with each other, the other end comprises a knob 71 and a handle assembly, and the second end of the second handle 2 cooperates with the proximal end of a push rod 75. When the anastomat meets the firing condition, the second handle pushes the nail pushing rod 75, and the nail pushing rod 75 can further push the nail pushing sheet and the annular cutter of the anastomat to suture and cut the tissue subjected to the operation. The structure of the stapler shown in fig. 2 is only an example, and in practical applications, other types of staplers may also use the handle assembly according to the embodiments of the present invention and achieve the objects of the present invention. For example, as shown in figure 3, the structure of the foreskin stapler body 9 employing the handle assembly is shown. The distal end of foreskin stapler body 9 includes a cartridge assembly 91, and is additionally provided with a glans cap assembly (not shown) that mates with cartridge assembly 91. When the foreskin anastomat is adopted, the second handle 2 is movably connected to one end of the foreskin anastomat, the second end of the second handle 2 is matched with a nail pushing component of the foreskin anastomat, and when the condition that the foreskin anastomat can be triggered is met, the second handle 2 pushes the nail pushing component to trigger the foreskin anastomat.

In the various exemplary drawings of the present invention, the housing of the handle assembly is omitted for clarity of illustration of the structure of the handle assembly and is not shown.

Referring now to FIG. 4, a schematic illustration of the connection of the handle assembly of the first embodiment of the present invention is shown in cross-section view in the direction A-A of FIG. 1. The first end 11 of the first handle 1 is a gripping end for a surgeon to operate during surgery. The second end 12 of the first handle 1 is rotatably connected to the first end 21 of the second handle 2 by a first pin 14 and the second end 22 of the second handle 2 is rotatably connected to the housing 74 of the stapler by a second pin 24. A first torsion spring 15 is further arranged between the second end 12 of the first handle 1 and the first end 21 of the second handle 2, and the first torsion spring 15 is sleeved outside the first pin shaft 14; a second torsion spring 25 is also provided between the second end 22 of the second handle 2 and the housing 74 of the stapler, the second torsion spring 25 being sleeved outside the second pin 24. Therefore, when the elastic portion 3 is in the first state, the instrument is in the safety state, and the first handle 1 can rotate around the first pin 14 in the counterclockwise direction when receiving a small pressure of the operator, and can be restored to the initial position in the clockwise direction by the first torsion spring 15 when the external force is released, and at this time, the second handle does not rotate. When the elastic part 3 is in the second state, the rotation of the first handle 1 drives the rotation of the second handle 2, so that the second handle 2 rotates around the second pin 24 in the counterclockwise direction, and is restored to the original state in the clockwise direction by the second torsion spring 25 when the external force is released.

The present invention is merely exemplary of a connection manner between the first handle and the second handle in the handle assembly, and in practical applications, other types of connection manners may be used, such as adding or subtracting a torsion spring, or changing a setting position of the torsion spring, etc., which are all within the scope of the present invention.

The structure of the elastic portion 3 according to the first embodiment of the present invention will be specifically described with reference to fig. 5 to 8. As shown in fig. 5, the elastic portion 3 is in the first state, and at this time the first handle 1 is in the initial position. In this embodiment, the second handle 2 has a second cavity 23, the elastic portion 3 is an elastic cavity 31 having two side walls, and when the elastic portion 3 is in the first state and the second state, the elastic cavity 31 is in a contracted state and an expanded state, respectively; the second end 42 of the pointer is located outside and inside the elastic cavity when the first and second position areas are located; the width of the pointer 4 is greater than the spacing between the side walls of the elastic cavity 31, where the width of the pointer 4 refers to the width of the pointer 4 in the direction perpendicular to the side walls of the elastic cavity 31, the side walls of the elastic cavity 31 refer to the spacing between the side walls of the two sides of the elastic cavity 31, and when the first end 41 of the pointer 4 moves from the outside of the elastic cavity 31 to the inside of the elastic cavity 31, the side walls of the elastic cavity 31 are expanded to two sides by the extrusion of the pointer 4. As shown in fig. 8, the first end 41 of the pointer 4 is located outside the elastic cavity 31, and the elastic cavity 31 is in a contracted state. As can be seen from fig. 5 to 8, when the elastic cavity 31 is in the contracted state, the side wall end surface of the elastic cavity 31 does not interfere with the side wall end surface of the second cavity 23.

As shown in fig. 9 to 10, the elastic portion 3 is in the first state and the first handle 1 is held by rotating counterclockwise. Since the side wall end surface of the elastic cavity 31 does not interfere with the side wall end surface of the second cavity 23 at this time, the elastic portion 3 may enter at least partially into the second cavity 23 (the amount of the entering varies with the degree of pressing of the first handle 1), and further, as the degree of pressing of the first handle 1 increases, the second end 12 of the first handle 1 may also enter partially into the second cavity 2. Thus, the first handle 1 does not exert a force on the second handle 2, and the second handle 2 remains unchanged in the secured position, i.e. the stapler is not fired. Because the torsion force of the first torsion spring 15 is much smaller than the trigger force, the pressure at this time is only the force to overcome the first torsion spring 15, and the doctor can also get tactile feedback at this time, knowing that the current pointer 4 does not reach the second position area, and does not trigger.

As shown in fig. 11 to 13, the elastic portion 3 is in the second state, and the first handle 1 is in the initial position at this time. As can be seen from comparing fig. 13 and fig. 8, after the pointer 4 enters the elastic cavity 31, the elastic cavity 31 is extruded, so that the side walls of the two sides of the elastic cavity 31 expand to two sides, and the elastic cavity 31 enters the expanded state. As can be seen from a combination of fig. 12 and 13, in this state, the side wall end surface of the elastic chamber 31 may have a certain interference with the side wall end surface of the second chamber 23. When the contact surfaces are relatively moved, a first thrust force F1 and a second thrust force F2 can be formed, and then a driving moment M of the second handle 2 is formed.

Further, as shown in fig. 13, the elastic cavity 31 may include an abutting section 32, a protruding section 33 and a guiding section 34, where the protruding section 33 is located between the abutting section 32 and the guiding section 34, the sidewall of the protruding section 33 protrudes toward the inside of the elastic cavity 31, and the sidewall spacing at the end face of the guiding section 34 is greater than the width of the pointer 4, so that the guiding section 34 may play a role in guiding the pointer 4 into the protruding section 33, and when the pointer 4 enters the protruding section 33, both side sidewalls of the abutting section 32 and the protruding section 33 expand toward both sides, and the sidewall end face of the abutting section 32 is the sidewall end face of the elastic portion 3. Further, the abutting section 32, the protruding section 33 and the guiding section 34 of the elastic cavity 31 may be integrally formed, and the side wall of the elastic cavity 31 may smoothly transition from the protruding section 33 to the abutting section 32, so that the pointer 4 may be guided to smoothly move in the elastic cavity 31.

As shown in fig. 14, the elastic portion is in the second state, and at this time the first handle 1 is rotated counterclockwise to be held. In the orientation shown in the figures, the pointer 4 is rotatably fixed to the inside of the housing of the stapler at a pointer fixing end 43, the first end 41 of the pointer 4 rotating in a second direction from the outside of the elastic cavity 31 to the inside of the elastic cavity 31, in this embodiment the second direction being clockwise. As shown in the figure, the side wall end surface of the elastic cavity 31 and the side wall end surface of the second cavity 23 are a pair of parallel inclined surfaces with guiding function. Thus, when the first end 41 of the pointer 4 enters the elastic cavity 31 and the elastic cavity 31 is opened, if the doctor holds the handle, the side wall end surface of the elastic cavity 31 and the side wall end surface of the second cavity 23 have an interaction force, and under the action of the interaction force, the distance between the side walls of the elastic cavity 31 is larger than the distance before holding the handle, that is, the distance between the side walls of the elastic cavity 31 is also larger than the width of the pointer 4. Along with the continuous rotation of the first handle 1, the pointer 4 is separated from the abutting section 32 of the elastic cavity 31, and after the second end of the handle 2 pushes the pull tab open when the instrument is in place, the pointer is not acted by the elastic cavity 31 and is reset. The elastic portion 3 is in an expanded state at this time. Because the side wall end surface of the elastic cavity 31 will have a certain interference with the side wall end surface of the second cavity 23, when the elastic part 3 moves, the elastic part 3 will not enter the second cavity 23 again, but will contact with the side wall end surface of the second cavity 23 and exert thrust, and the second handle 2 is pushed to rotate by the driving moment M, so that the second handle 2 finally reaches the firing position, i.e. the firing anastomat is realized.

When in firing, the first handle 1 rotates to jack up the pull tab, so that the pull tab is separated from the pointer 4, and the pointer 4 can return to an initial state under the action of a return spring (not shown). And the elastic part 3 is not supported by the pointer 4, and after the first handle 1 is released and the first handle 1 is rotated clockwise to return to the initial position due to the restoring force of the first torsion spring 15, the second handle 2 is also rotated clockwise to return to the safety position due to the restoring force of the second torsion spring 25.

Further alternatively, the side wall end surface of the elastic cavity 31 is a first guide surface having an angle smaller than 90 ° with the side wall of the elastic cavity 31, and the side wall end surface of the second cavity 23 is a second guide surface parallel to the first guide surface. Namely, two guiding inclined planes are arranged at the corresponding positions of the elastic cavity 31 and the second cavity 23, so that the effective matching length between the two inclined planes is conveniently increased to improve the operation reliability, and meanwhile, when the firing is completed and the retraction is completed, the reset can be realized.

Further alternatively, the elastic cavity 31 may be integrally formed with the second end 12 of the first handle 1, for example by stamping, and the second end 12 of the first handle 1 may have the first cavity 13, and the elastic cavity 31 is in communication with the first cavity 13.

In fig. 14, when the second end 42 of the pointer 4 is in the first position area, the first end 41 of the pointer 4 does not enter the interior of the elastic cavity 31; when the second end 42 of the pointer 4 is in the second location area L, the first end 41 of the pointer 4 enters the interior of the elastic cavity 31. After the firing is completed, the second end 42 of the pointer 4 may return to the first position area in the direction shown by R in the figure, i.e. the first end 41 of the pointer 4 is moved away from the interior of the elastic cavity 31, and the elastic cavity 31 may return to the contracted state without interfering with the second handle 2. After the external force of the first handle 1 is relieved, the first handle 2 also returns to the initial state by the acting force of the first torsion spring 15, and the second handle 2 also returns to the safety state by the acting force of the second torsion spring 25.

Second embodiment

Fig. 16 to 25 are schematic structural views showing a handle structure according to a second embodiment of the present invention. This embodiment differs from the first embodiment in that the manufacturing costs may be increased in view of the fact that the elastic portion and the first handle are integrally formed, and that the elastic portion is provided as a separate component.

As shown in fig. 16 to 19, the elastic portion 5 in this embodiment is schematically structured. The elastic portion 5 also comprises an elastic cavity, the elastic cavity comprises an abutting section and an elastic section 52, the second end 12 of the first handle 1 is provided with the first cavity 13, the elastic section 52 of the elastic cavity is inserted into the first cavity 13, the side wall end face of the abutting section is located outside the first cavity 13 as an abutting end face 51, and the abutting end face 51 abuts against the side wall end face of the first cavity 13. Similarly, when the pointer 6 enters the inside of the elastic section 52 from the outside of the elastic cavity, the side walls of the elastic section 52 and the abutting section expand to both sides, so that the abutting end face 51 also expands to both sides. Optionally, the elastic cavity further comprises a connecting section 53, the elastic section 52 is located between the abutting section and the connecting section 53, the connecting section 53 is inserted into the first cavity 13, and the connecting section 53 is fixed to the first cavity 13 by a fastener, for example, by hole fitting on the side wall of the first handle 1 to achieve a fixed connection assembly.

As shown in fig. 18, when the pointer 6 of the second embodiment of the present invention is located outside the elastic portion 5, the elastic portion 5 is in a contracted state and the first handle 1 is in an initial position; FIG. 19 is a sectional view taken along the direction D1-D1 in FIG. 18. As can be seen from fig. 19, the abutting end face 51 of the elastic portion 5 does not interfere with the side wall end face of the second cavity 23.

As shown in fig. 20, when the pointer 6 of the second embodiment of the present invention is located outside the elastic portion 5, the first handle 1 is pressed, and at this time, the elastic portion 5 is in a contracted state, and the first handle 1 rotates counterclockwise; fig. 21 is a sectional view in the direction D2-D2 in fig. 19. As can be seen from fig. 22, since the abutting end surface 51 of the elastic portion 5 does not interfere with the side wall end surface of the second cavity 23, the elastic portion 5 will at least partially enter the second cavity 23 and not contact with the second handle 2, and thus the second handle 2 will not be pushed to perform firing.

As shown in fig. 22, when the pointer 6 of the second embodiment of the present invention is located in the elastic portion 5, the elastic portion 5 is in an expanded state and the first handle 1 is in an initial position, when the handle assembly is not pressed by the first handle 1; fig. 23 is a sectional view taken along the direction D3-D3 in fig. 22. As can be seen from fig. 23, the abutting end surface 51 of the elastic portion 5 has a certain interference relationship with the side wall end surface of the second cavity 23.

As shown in fig. 24, the structure of the handle assembly pressed by the first handle 1 is schematically shown when the pointer 6 of the second embodiment of the present invention is located in the elastic portion 5, and the elastic portion 5 is located in the expanded state; fig. 25 is a sectional view taken along the direction D4-D4 in fig. 24. As can be seen from fig. 25, since the abutting end surface 51 of the elastic portion 5 has a certain interference relationship with the side wall end surface of the second cavity 23, when the elastic portion 5 moves, the elastic portion 5 does not enter the second cavity 23, and the abutting end surface 51 pushes the second handle 2, so that the second handle 2 moves along with the movement of the first handle 1, and the second handle 2 is pushed to the firing position for firing the stapler.

Third embodiment

Fig. 26 to 27 are schematic structural views of a handle assembly according to a third embodiment of the present invention. This embodiment differs from the first two embodiments in that: the resilient portion 83 may be a single solid spring. The effect of the solid dome on the linkage between the first handle and the second handle is shown only by way of example in fig. 26-27. As shown in fig. 26, when the elastic portion 83 is in the first state, the elastic portion 83 does not interfere with the second handle 82, and when the first handle 81 moves (moves to the position indicated by the broken line in the drawing), the elastic portion 83 can move along the outer surface of the second handle 82, and therefore the first handle 81 does not interlock with the second handle 82.

As shown in fig. 27, when the elastic portion 83 is in the second state, the pointer (not shown) pushes the elastic portion 83 to bend the elastic portion 83 to one side, so as to interfere with the second handle 82, when the first handle 81 moves (moves to the position corresponding to the broken line in the figure), the end of the elastic portion 83 abuts against the second handle 82 to push the second handle 82 to move (moves to the position corresponding to the broken line in the figure), and when the pointer does not push the elastic portion 83, the elastic portion 83 can be restored by its own elastic force, so that the interference with the second handle 82 is released. In this case, the second handle 82 may not be provided with the second cavity, and the first handle 81 may not be provided with the first cavity.

When the embodiment is adopted, only the second handle 81 is linked with the nail pushing rod of the circular tube type anastomat, when the second handle 81 does not move, the nail pushing rod is not pushed to fire, and when the second handle 81 moves, the nail pushing rod is driven to fire the anastomat.

Fourth embodiment

Fig. 28 to 33 show the structure and operation of a handle assembly according to a fourth embodiment of the present invention. This embodiment differs from the first embodiment in that the first handle 1 is not provided with an elastic portion, but is provided with a slider 91 and a chute 17. The chute 17 comprises a first section and a second section which are communicated, and the sliding block 91 can move in the chute 17; the movement of the second end 42 of the pointer 4 from the first to the second position area drives the slider 91 from the first section of the chute 17 to the second section of the chute 17. The second handle 2 comprises a handle guide 26.

As shown in fig. 28 to 30, the first handle 1 includes a first cavity 13 having side walls on both sides. The slider 91 includes a sliding portion 911 at both ends and a slider guiding portion 912 in the middle, and is further provided with a torsion spring limiting portion 331, and a slider return torsion spring 16 is provided at the torsion spring limiting portion 331, and when the slider moves from the first section of the chute 17 to the second section of the chute 17, the slider return torsion spring 16 is driven to deform.

As shown in fig. 31, the handle assembly is shown in a deactivated state. At this time, the second end 42 of the pointer 4 is not pulled by the pull tab, but is located outside the triggerable area L, the slider 91 is located at the first section of the chute 17, the slider guide 912 of the slider 91 does not interfere with the second handle 2, and when the first handle 1 rotates counterclockwise, it does not interlock with the second handle 2, and the second handle 2 is still at the initial position and does not rotate. At this time, the operator can hold the first handle 1, but does not fire the anastomat, and the operator can know that the anastomat is in a failure state currently according to the magnitude of the holding force and does not fire.

It should be noted that the first and second sections of the chute 17 in the present invention are a relative concept, i.e. the first section of the chute 17 is located to the right of the second section of the chute 17 in the view shown in fig. 28-33.

As shown in fig. 32 and 33, the handle assembly is shown in a fired configuration. At this time, the second end 42 of the pointer 4 is pulled by the pull tab into the cocked region L, and the first end 41 thereof drives the slider 91 to move toward the second end of the chute 17, and the slider guide 912 interferes with the second handle 2.

Holding first handle 1 at this time, first handle 1 rotates counterclockwise, slider guide 912 drives second handle 2 to rotate counterclockwise therewith, and second end 22 of second handle 2 pushes the staple pusher and thereby fires the stapler. When the pull tab is disengaged from the pointer 4, so that the pointer 4 is restored to its original position by a pointer return torsion spring (not shown), the restoring force of the slider return torsion spring 16 pushes the slider 91 to return. The resetting process of the first handle 1 and the second handle 2 is the same as that of the first embodiment, and will not be described again.

Fifth embodiment

Fig. 33 to 35 show the structure and operation of a handle assembly according to a fifth embodiment of the present invention. This embodiment differs from the fourth embodiment in that the chute 27 is provided on the second handle 2, the first section of the chute 27 being located on the left side of the second section, and that a handle guide (not identified in the figures) is provided on the first handle 1. The slider 92 is connected to the first end 41 of the pointer 4 by a link 93, and the first end 41 of the pointer 4 is rotatable about the second end 42 by the pull tab. The pointer 4 is provided with a link groove 44, a first end 931 of a link 93 is slidably disposed in the link groove 44, and a second end 932 of the link 93 is connected to the slider 92 through a connecting pin 921, so that the force of the pointer 4 is transmitted to the slider 92. Similarly, the second handle 2 includes a second cavity having two side walls, and two slide grooves 27 are provided on the two side walls of the second cavity, respectively, and the slider 92 includes two side sliding portions and a middle slider guiding portion (not shown). The sliding portions of the slide blocks 92 are respectively embedded in a slide groove 27. A slider reset torsion spring may be further disposed between the slider 92 and the first handle 1, for resetting the slider 92, or the first torsion spring 15 may be directly used as a reset torsion spring of the slider 92.

As shown in fig. 35, the structure of the handle assembly of the fifth embodiment is shown in a disabled state. At this time, the first end 41 of the pointer 4 is outside the cocked region L without being subjected to the pull tab. The link 93 does not act on the slide 92, and the slide 92 is located at the first section of the chute 27, and when the first handle 1 is rotated, the second handle 2 is not linked, so that the stapler is not fired.

As shown in fig. 36, the handle assembly of the fifth embodiment is shown in a fired state. At this point, the first end 41 of the pointer 4 is acted upon by the pull tab to enter the cocked region L. The pointer 4 moves the slide 92 from the first section to the second section of the chute 27 by means of the link 93. The slider guide interferes with the first handle 1. When the first handle 1 rotates anticlockwise, the first handle is abutted against the slide block guide part, so that the second handle 2 is driven to rotate anticlockwise, and the second end 22 of the second handle 2 pushes the nail pushing rod to fire the anastomat. When the pull tab is disengaged from the pointer 4, so that the pointer 4 is restored to its original position by a pointer restoring torsion spring (not shown), the restoring force of the slider restoring torsion spring pushes the slider 92 to restore. The resetting process of the first handle 1 and the second handle 2 is the same as that of the first embodiment, and will not be described again.

Sixth embodiment

Fig. 37 is a schematic view showing the structure of a handle assembly according to a sixth embodiment of the present invention. This embodiment differs from the fourth embodiment in that the first handle 1 and the second handle 2 of the fourth embodiment are rotated about two rotation centers of the first pin 14 and the second pin 24, respectively. While the first handle 1 and the second handle 2 of the handle assembly in the sixth embodiment are rotated simultaneously about the first pin 14. That is, in this embodiment, the first handle 1 and the second handle 2 are both sleeved outside the first pin 14, the first torsion spring 15 is sleeved outside the first pin 14, and two ends of the first torsion spring 15 respectively abut against the second handle 2 and the housing of the anastomat, so as to provide a restoring force of the second handle 2. In order to reset the first handle 1, a second pin shaft 24 fixed on the housing of the anastomat is also arranged, a second torsion spring 25 is sleeved outside the second pin shaft 24, and two ends of the second torsion spring 25 respectively abut against the first handle 1 and the housing of the anastomat to provide reset force of the first handle 1. The second torsion spring 25 is deformed when the first handle 1 is rotated, and the first torsion spring 15 is deformed when the second handle 2 is rotated. Other matters and other working procedures of this embodiment are the same as those of the fourth embodiment, and are not described in detail herein.

The embodiment of the invention also provides a anastomat, which comprises the handle assembly. When the anastomat does not reach the triggerable state, the first handle does not drive the second handle, so that the anastomat is not triggered, a doctor can judge the triggerable state through operation experience, and only when the anastomat reaches the triggerable state, the movement of the first handle drives the movement of the second handle, so that the anastomat is triggered. Therefore, on the basis of avoiding the anastomat from being triggered by mistake, the case of the anastomat is prevented from cracking.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. A handle assembly for firing of a stapler, the handle assembly comprising a first handle, a second handle, a pointer and an elastic portion, the first handle being rotatable relative to the second handle, the first and second handles having a linked state and an unlink state; the pointer can move between a first position area and a second position area, and the elastic part is positioned on the first handle;

when the elastic part is in a first state and the first handle rotates along a first direction, the first handle and the second handle are in an unlink state, the elastic part does not collide with the second handle, the second handle does not rotate, and the anastomat cannot be fired;

when the elastic part is in a second state and the first handle rotates along a first direction, the first handle and the second handle are in a linkage state, and the elastic part is in contact with the second handle and drives the second handle to rotate along the first direction so as to fire the anastomat;

The elastic part is an elastic cavity with two side walls, when the pointer moves from the first position area to the second position area, the pointer enters the elastic cavity from the outside to the inside, and drives the elastic cavity to enter an expansion state from a contraction state, so that when the first handle rotates along a first direction, the end face of the side wall of the elastic cavity in the expansion state is in contact with the second handle; or alternatively, the first and second heat exchangers may be,

the elastic part comprises an elastic piece, and when the pointer moves from the first position area to the second position area, the pointer pushes the elastic piece to incline to one side, so that when the first handle rotates along the first direction, the elastic piece is abutted against the second handle.

2. The handle assembly of claim 1, wherein the first end of the first handle is a gripping end and the second end of the first handle is rotatably coupled to the first end of the second handle; when the second handle rotates in a first direction, the second end of the second handle pushes the staple pushing rod of the stapler to fire the stapler.

3. The handle assembly of claim 1, wherein the first handle and the second handle rotate about the same center or the first handle and the second handle rotate about two centers.

4. The handle assembly of claim 1, wherein the pointer is connected to a distal end of the pull tab, the proximal end of the pull tab is sleeved on the screw, a knob is provided at the proximal end of the screw, and rotation of the knob moves the pull tab proximally, and the pull tab moves the pointer from the first location area to the second location area.

5. The handle assembly of claim 1, wherein the first handle is rotatably coupled to the second handle by a first pin and the second handle is rotatably coupled to the housing of the stapler by a second pin.

6. The handle assembly of claim 5, wherein the first pin and the second pin are respectively sleeved with a first torsion spring and a second torsion spring, two ends of the first torsion spring respectively abut against the first handle and the second handle, and two ends of the second torsion spring respectively abut against the second handle and a casing of the anastomat.

7. The handle assembly of claim 1, wherein the resilient portion is the resilient cavity and the first end of the second handle is provided with a second cavity; when the first handle rotates along the first direction, the elastic cavity in the contracted state can at least enter the second cavity, the side wall end face of the elastic cavity in the expanded state is in contact with the side wall end face of the second cavity, and the elastic part is prevented from continuously entering the second cavity.

8. The handle assembly of claim 7, wherein the side wall end surface of the resilient cavity is a first guide surface having an angle of less than 90 ° with the side wall of the resilient cavity, and the side wall end surface of the second cavity is a second guide surface parallel to the first guide surface.

9. The handle assembly of claim 1, wherein the resilient cavity comprises an interference section, a protruding section and a guiding section, the protruding section being located between the interference section and the guiding section, a sidewall spacing of the protruding section being less than a width of the pointer, a sidewall spacing of an end of the guiding section being greater than the width of the pointer to guide the pointer into the protruding section.

10. The handle assembly of claim 9, wherein the interference section, the protruding section, and the guide section of the resilient cavity are integrally formed, and the side wall of the resilient cavity smoothly transitions from the protruding section to the guide section.

11. The handle assembly of claim 9, wherein the second end of the first handle has a first cavity, the resilient cavity being integrally formed with the first cavity and in communication with one another.

12. The handle assembly of claim 1, 7 or 8, wherein the resilient cavity comprises an interference section and a resilient section, the second end of the first handle having a first cavity, the resilient section being inserted into the interior of the first cavity, the sidewall end face of the interference section being located outside of the first cavity;

13. The handle assembly of claim 12, wherein the resilient cavity further comprises a connecting segment, the resilient segment is located between the interference segment and the connecting segment, the connecting segment is inserted into the interior of the first cavity, and the connecting segment is secured to the first cavity by a fastener.

14. The handle assembly of claim 1, wherein the pointer is rotatably secured to the interior of the housing of the stapler, the pointer rotating in a second direction from the exterior to the interior of the resilient cavity, the first direction being opposite the second direction.

15. A stapler comprising a handle assembly according to any one of claims 1 to 14.