CN109953789B

CN109953789B - Handle assembly and anastomat comprising same

Info

Publication number: CN109953789B
Application number: CN201711434086.9A
Authority: CN
Inventors: 陈志�; 郭毅; 林江; 徐晓伟
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: 2024-02-13
Anticipated expiration: 2037-12-26
Also published as: CN109953789A

Abstract

The invention provides a handle assembly and an anastomat comprising the same, wherein the handle assembly comprises a pointer; a first handle and a second handle; the sliding groove and the sliding block are positioned on the first handle, and 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; 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 the 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 drives the second handle to move towards the firing position. 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; regardless of whether the stapler reaches the cocked position, the surgeon may press the first handle, however, when the stapler does not reach the cocked state, the first handle does not drive the second handle, and the stapler is not cocked.

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 position, 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.

An embodiment of the present invention provides a handle assembly for firing of a stapler, the handle assembly comprising: a pointer movable between a first location area and a second location area; a first handle and a second handle; the sliding groove comprises a first section and a second section which are communicated, the sliding groove is positioned on the first handle, and the sliding block can move in the sliding groove; 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; 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 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 device further comprises a slider return spring, wherein the slider applies a force to the slider return spring to enable the slider return spring to be in a deformed state; when the sliding block reset spring is restored to the initial state from the deformed state, the sliding block is driven to move from the second section of the sliding groove to the first section of the sliding groove.

Optionally, the slider return spring is a slider return torsion spring, and a first end and a second end of the slider return torsion spring respectively abut against the slider and the second handle.

Optionally, the second handle includes a handle guide; the sliding block comprises a sliding part and a sliding block guiding part, and the sliding part can move in the sliding groove; 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 abutted against the handle guide part.

Optionally, the handle guide portion includes a first handle guide surface and a second handle guide surface that are adjacent to each other, and the slider guide portion includes a guide section including a first slider guide surface and a second slider guide surface that are adjacent to each other; when the slider guide part is abutted against the handle guide part, the second slider guide surface and the second handle guide surface are corresponding in position and parallel to each other.

Optionally, an included angle smaller than 90 ° is formed between the second handle guiding surface and the length direction of the chute.

Optionally, the second slider guide surface abuts against the second handle guide surface, and when the first handle rotates in the first direction, the second slider guide surface applies a thrust force F to the second handle guide surface, the thrust force F includes a component F1 and a component F2 perpendicular to each other, the component F1 is perpendicular to the second slider guide surface, and f1×β < F2, where β is a friction coefficient between the second slider guide surface and the second handle guide surface.

Optionally, the slider guide further comprises a connecting section adjoining the guide section, the connecting section comprising a third slider guide surface adjoining the second slider guide surface.

Optionally, the first handle includes a first cavity having two side walls, the two side walls of the first cavity are respectively provided with a chute, the slider includes two sliding parts and a slider guiding part, and the two sliding parts can respectively move in one chute; when the sliding parts are respectively positioned at the first sections of the corresponding sliding grooves and the first handles rotate along the first direction, the second handles at least partially enter the first cavity; when the sliding parts are respectively positioned at the second sections of the corresponding sliding grooves and the first handle rotates along the first direction, the sliding block guiding parts are abutted against the second handle and prevent the second handle from continuously entering the first cavity.

Optionally, the second handle includes a second cavity having two side walls, the handle guide portion is located in the second cavity, and a width of the handle guide portion is smaller than or equal to a width of the slider guide portion.

Optionally, the slider further includes a boss, the boss is located between a sliding part and the slider guiding part, a concave part is provided at the top end of the boss, and a slider reset torsion spring is provided between the inner surface of the concave part and the second handle.

Optionally, the pointer is rotatably fixed to the inside of the housing of the stapler.

The embodiment of the invention also provides an anastomat which is characterized by comprising the handle assembly.

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

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; 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 position, the first handle can not drive the second handle, and the anastomat can not be triggered, and the doctor can judge the triggering state through operation experience, and only when the anastomat reaches the triggerable position, 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 an embodiment of the present invention;

FIG. 2 is a schematic view of a circular tube-type stapler according to an embodiment of the present invention;

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

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

FIG. 5 is a schematic view of a slider according to an embodiment of the present invention;

FIG. 6 is a schematic view of the handle assembly with the slider positioned in the first section of the chute according to an embodiment of the invention;

FIG. 7 is a schematic view of the handle assembly when the slider is in the second section of the chute according to an embodiment of the invention;

FIG. 8 is a schematic view of the structure of a second handle according to an embodiment of the present invention;

FIG. 9 is a schematic view showing a combination of a second handle and a slider when the slider is positioned at a first section of a chute according to an embodiment of the present invention;

FIG. 10 is a schematic view of the handle assembly of the first embodiment of the present invention with the slider at the first section of the chute and the first handle not rotated;

FIG. 11 is a schematic view of a first section of a chute with a slider and a handle assembly rotated by a first handle according to an embodiment of the present invention;

FIG. 12 is a schematic view of a slider of an embodiment of the present invention in two positions at a second section of a chute;

FIG. 13 is an enlarged view of the chute and slide portion of FIG. 12;

FIG. 14 is a schematic view of the handle assembly with the slider positioned closer to the second section of the chute and the first handle not rotated in accordance with an embodiment of the present invention;

FIG. 15 is a schematic view of the second handle and slider combination of FIG. 14;

FIG. 16 is a schematic view of the handle assembly with the slider positioned closer to the second section of the chute and the first handle rotated in accordance with one embodiment of the present invention;

FIG. 17 is a schematic view of the handle assembly with the slider positioned closer to the second segment of the chute and the pointer reset in accordance with one embodiment of the present invention;

FIG. 18 is a schematic view of the handle assembly with the slider of one embodiment of the present invention in a remote position from the second section of the chute and the first handle not rotated;

FIG. 19 is a schematic view of the second handle and slider combination of FIG. 18 in accordance with the present invention;

FIG. 20 is a schematic view of the handle assembly of the slider of an embodiment of the present invention in a position further away from the second section of the chute and with the first handle rotated;

FIG. 21 is a schematic view of the handle assembly with the slider at a remote location in the second section of the chute and the pointer reset in accordance with an 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.

In order to achieve the above object, as shown in fig. 1, an embodiment of the present invention provides a handle assembly for firing of a stapler, the present invention segments the handle assembly (a housing of the handle assembly is omitted for clarity in fig. 1) into a first handle 1 and a second handle 2, and can fire the stapler only when the second handle 2 is rotated, and further provides a pointer 4 for controlling the relative movement 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, 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 a sliding groove 17 and a sliding block 3, the sliding groove 17 comprises a first section and a second section which are communicated, and the sliding block 3 can move in the sliding groove 17; when the second end 42 of the pointer 4 moves from the first position area to the second position area, the sliding block 3 is driven to move from the first section of the sliding groove 17 to the second section of the sliding groove 17; the pointer 4 drives the sliding block 3, which means that the pointer 4 directly pushes (pulls) the sliding block 3 or indirectly pushes (pulls) the sliding block, for example, a transmission rod or other types of transmission mechanisms can be arranged between the pointer 4 and the sliding block 3 to transmit the movement of the pointer 4 into the sliding block 3, which falls within the protection scope of the present invention.

The sliding block 3 is positioned at the first section of the sliding groove 17, and when the first handle 1 is held and rotates along the first direction, the sliding block 3 does not collide with the second handle 2 in the moving process, and the second handle 2 is positioned at the safety position; the sliding block 3 is located at the second section of the sliding groove 17, and when the sliding groove 17 moves along with the rotation of the first handle 1 along the first direction, the sliding block 3 collides with the second handle 2 and drives the second handle 2 to move from the safety position to the firing position. In this embodiment, the first direction is the direction in which the counterclockwise handle is held in the figure.

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 sliding block 3 is positioned at the first section of the sliding groove 17, and the moving process of the sliding block 3 is not contacted with the second handle 2, so that acting force can not be generated on the second handle 2, and the second handle 2 still keeps an initial safety state and can not be fired; when the pointer 4 is in the second position area, the slider 3 will drive the second handle 2 to move and push the second handle 2 to the firing position during the counterclockwise rotation of the first handle 1 due to the slider 3 being in the second section of the chute 17. 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, and the surgeon holds the first handle 1, so that the surgeon can easily rotate the first handle 1, but does not trigger the second handle 2, because the force holding the first handle is very small when the stapler is in the empty firing state. The doctor can also know that the current anastomat is in an unfired state through the operation experience, and the shell of the anastomat cannot be broken; when the anastomat is ready for firing, the pointer 4 is in the second position area, and at the moment, a doctor holds the first handle 1, and the movement of the first handle 1 drives the movement of the second handle 2, so that the anastomat is driven to fire.

It should be noted that the first and second sections of the chute 17 according to the 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 the figures.

Referring now to fig. 2, a schematic view of a handle assembly for a stapler according to an embodiment of the present invention is shown. One end of the stapler comprises a cartridge assembly 52 and an anvil assembly 53 which cooperate with each other, the other end comprises a knob 51 and a handle assembly, and the second end of the second handle 2 cooperates with the proximal end of a push rod 55. When the anastomat meets the firing condition, the second handle pushes the nail pushing rod 55, and the nail pushing rod 55 further pushes 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.

As shown in fig. 4, the first end 11 of the first handle 1 is a grip portion for a doctor to operate during surgery. The second end 12 of the first handle 1 may be 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 may be rotatably connected to the housing 54 of the stapler by a second pin 24. Further, a first torsion spring 15 is further arranged between the first handle 1 and the second handle 2, the first torsion spring 15 is sleeved on the first pin shaft 14, a second torsion spring 25 is further arranged between the second handle 2 and the housing 54 of the anastomat, and the second torsion spring 25 is sleeved on the second pin shaft 24. Therefore, when the slide block 3 is located at the first section of the chute 17, the apparatus is in a safe state, the first handle 1 can rotate around the first pin 14 when being subjected to a small holding force by an 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 2 does not rotate. When the slider 3 is located at the second section of the chute 17, 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, and is restored to its original shape in the clockwise direction by the second torsion spring 25 when the external force is released.

Further, a slider return spring is further provided in the handle assembly, and the slider 3 applies a force to the slider return spring to make the slider return spring in a deformed state, and when the slider return spring returns from the deformed state to the initial state, the slider 3 is pushed to move from the second section of the chute to the first section of the chute 17. As shown in fig. 4, the slider return spring may be selected as a slider return torsion spring 16, and a first end and a second end of the slider return torsion spring 16 abut against the slider 3 and the second handle 2, respectively. Therefore, when the slider 3 moves from the first section to the second section of the slide groove 17, the slider 3 pushes the first end of the slider return torsion spring 16 to deform the torsion spring, and when the external force is released on the slider 3, the slider 3 returns to the first section of the slide groove 17 by the restoring force of the slider return torsion spring 16. Further, the slider return spring may also be a tension spring, a compression spring, or the like.

The structure of the slider in this embodiment will be specifically described with reference to fig. 5 to 9. The slider may include a sliding portion 31 and a slider guide portion 32, the sliding portion 31 being movable inside the chute 17, and the second handle 2 being provided with the handle guide portion 26. The slider 3 is located at the second section of the chute 17, and when the first handle 1 is held for rotation, the slider guide 32 abuts against the handle guide 26.

In this embodiment, the first handle 1 may include a first cavity 13 having two side walls, where a sliding groove 17 is respectively disposed on the two side walls of the first cavity 13, and correspondingly, the slider 3 includes two sliding portions 31, where the two sliding portions 31 are respectively embedded in the two sliding grooves 17, and the sliding portions 31 are respectively movable in the corresponding sliding grooves 17.

The sliding parts 31 are respectively positioned at the first sections of the corresponding sliding grooves 17, and when the first handle 1 is held and rotated anticlockwise, the second handle 2 at least partially enters the first cavity 13; thus, the movement of the first handle 1 does not bring about the movement of the second handle 2. The sliding portions 31 are respectively located at the second sections of the corresponding sliding grooves 17, and when the first handle 1 is held and rotated counterclockwise, the slider guide portions 32 collide with the handle guide portions 26. Thus, the movement of the first handle 1 drives the movement of the second handle 2, so that the second handle completes the firing action under the acting force.

Further, the second handle 2 may include a second cavity 23 having both side walls, the handle guide 26 is located in the second cavity 23, and the width of the handle guide 26 is less than or equal to the width of the slider guide 32. Here, the width of the handle guide 26 refers to the length thereof in the direction perpendicular to the side wall of the first cavity 13, and the width of the slider guide 32 refers to the length of the slider guide 32 thereof in the direction perpendicular to the side wall of the first cavity 13, but is not limited thereto.

Further, the slider 3 may further include a boss 33, the boss 33 being located between a sliding portion 31 and the slider guide portion 32, a recess 331 being provided at a top end of the boss 33, the slider return torsion spring 16 being provided between an inner surface of the recess 331 and the first handle 1.

As shown in fig. 9, the handle guide 26 includes a first handle guide surface 261 and a second handle guide surface 262 adjacent to each other, the slider guide 32 includes a guide section, that is, a portion having an inclined surface on the left in the drawing, the guide section includes a first slider guide surface 321 and a second slider guide surface 322 adjacent to each other, and when the slider guide 32 collides with the handle guide 26 by a pointer, the second slider guide surface 322 corresponds in position to the second handle guide surface 262 and is parallel to each other. The position correspondence here means that when the slide 3 is located in the second section of the chute 17 and the first handle 1 is rotated anticlockwise, the second slide guiding surface 322 and the second handle guiding surface 262 are projected to coincide in the direction of movement along the chute 17, i.e. the second slide guiding surface 322 abuts against the second handle guiding surface 262, the second slide guiding surface 322 applies a force to the second handle guiding surface 262, and under the interaction force, the slide 3 has a tendency to move further towards the second section of the chute 17, so that a more reliable engagement between the slide 3 and the second handle 2 is obtained, thereby pushing the second handle to move.

Alternatively, to avoid the fuzzy zone, a state in which the slider guide 32 and the handle guide 26 are engaged but disengaged may occur, with the embodiment further adding an opposing ramp guide mechanism. The second handle guide surface 262 has an angle of less than 90 degrees with respect to the length of the chute 17. I.e. the second handle guide surface 262 is shown as a beveled surface. When the second handle guiding surface 262 is abutted against the second slider guiding surface 322, the second handle guiding surface 262 and the second slider guiding surface 322 can be guided to move relatively, the contact area of the second handle guiding surface 262 and the second slider guiding surface 322 is increased, and when the second handle guiding surface 262 and the second slider guiding surface are completely abutted, the contact area is larger than that of the two planes, so that when the condition is met, the movement of the first handle is more stable and reliable to push the second handle.

Further, the frictional force between the second handle guide surface 262 and the second slider guide surface 322 does not interfere with the sliding between the second handle guide surface 262 and the second slider guide surface 322. That is, when the second slider guide surface 322 collides with the second handle guide surface 262 and the first handle 1 rotates counterclockwise, the second slider guide surface 322 applies a thrust force F to the second handle guide surface 262, the thrust force F including a component F1 and a component F2 perpendicular to each other, the component F1 being perpendicular to the second slider guide surface, and f1×β < F2, where β is a friction coefficient between the second slider guide surface 322 and the second handle guide surface 262.

With the slider guide 32 and the handle guide 26 configuration of this embodiment, there are only two conditions after contact, either fully engaged or fully disengaged, because both are point-to-point and the probability of point-to-point bump is negligible.

Further alternatively, the slider guide 32 may further comprise a connecting section adjoining the guide section, i.e. a platform-like part on the right in the figure, but may in practice also not be platform-shaped. The function of the platform portion is to strengthen the guide section and to connect the two side slides 31. The connecting section comprises a third slider guide surface 323, which adjoins the second slider guide surface 322.

The structures of the slider guide 32 and the handle guide 26, and the inclination angle are only one specific alternative embodiment, and other structures are also possible in practical applications, for example, the second slider guide surface 322 and the second handle guide surface 262 are both disposed parallel to the extending direction of the chute, and the like, which are all within the scope of the present invention.

The process of the first handle movement when the slider 3 is in the first section of the chute 17 will be described below with reference to fig. 9 to 11. In fig. 9 to 11, the first handle 1 is not rotated; in fig. 11, the first handle 1 is held and rotated.

As shown in fig. 10, the pointer 4 is rotatably fixed to the inside of the housing of the stapler by a fixed end, and the second end 42 of the pointer 4 is moved between the first position area and the second position area, so is the first end 41 of the pointer 4. In the initial position, the slider 3 is located at the end of the first section of the chute, which is far from the second section, i.e., the right end position as shown in the drawing, by the slider torsion spring 16. Of course, the first end 41 of the pointer 4 may also limit the initial position of the slider 3. As can be seen in fig. 10, as the knob is rotated, the pull tab pulls on the second end of the pointer, and when the second end 42 of the pointer 4 is located in the first position area under the action of the pull tab, the first end of the pointer 4 gradually toggles the slider 3 to move in the direction from the first section to the second section of the chute 17, but does not enter the second section of the chute; the slider 3 is located at the first section of the chute 17, i.e. at the right end of the chute 17 in the figure, when the first handle 1 is not rotated. Fig. 11 shows the first handle 1 after rotation. However, the handle guide 26 and the slider guide 32 are not in contact with each other, i.e. the slider 3 does not cause the first handle 1 to be interlocked with the second handle 2, the second handle 2 will partially enter the first cavity 13, and the position of the second handle 2 itself is not changed, i.e. the holding force applied by the user to the first handle 1 does not drive the rotation of the second handle, so that the second handle 2 is still in the initial safety position and the stapler will not be fired. Because the torsion of the first torsion spring 15 is much smaller than the trigger force, the pressure is only used for overcoming the force of the first torsion spring 15, and the doctor can still press the first handle 1 but can not drive the second handle 2, so that the trigger of the anastomat can not be caused, and meanwhile, the doctor can obtain the tactile feedback at the moment, and knows that the current pointer 4 does not reach the trigger area and does not trigger.

The process of the first handle movement when the slider 3 is in the second section of the chute 17 will be further described with reference to fig. 12-21. Fig. 12 to 13 are schematic views showing the sliding block 3 of this embodiment in two positions of the second section of the chute 17.

I.e. in this embodiment, the slide 3 is located in the second section of the chute 17 (i.e. the left end of the chute 17 in the figure) in two cases: first, the slider 3 is located at a position closer to the second section of the chute 17, i.e. the slider to the right in fig. 13, and the sliding portion 31 is located at a certain distance from the end face of the second end of the chute 17; second, the slider 3 is located at a further position of the second section of the chute 17, i.e. the slider to the left in fig. 13, the sliding portion substantially abutting the end face of the second end of the chute 17. In this embodiment, both of these cases can realize the linkage of the first handle 1 and the second handle 2, and, in the state between the first case and the second case, the linkage of the first handle 1 and the second handle 2 can also be realized, so that the area that can be fired when the doctor operates is increased, and the firing process is more stable, and the difficulty of the doctor operation is reduced to some extent. However, in this embodiment, it is also possible to retract the left end face of the chute 17 to the right in practical applications, so that only the first case exists, which falls within the scope of the present invention.

As shown in fig. 14, the pointer 4 is turned by the pull tab, the second end 42 of the pointer 4 enters the region L of the just second position, the slider 3 is located in the nearer position of the second section of the chute 17, and the first handle 1 is not rotated. If the knob is continuously rotated, the pull tab continuously drives the first end 41 of the pointer 4 to push the sliding block 3 to move leftwards along the sliding groove 17, and correspondingly, the distance between the nail anvil and the nail bin is gradually reduced. As a result, as shown in fig. 15, the projected overlapping portion of the slider guide 32 and the handle guide 26 in the moving direction along the chute 17 gradually increases, so that a more reliable connection between the first handle 1 and the second handle 2 is obtained. As shown in fig. 16, the first handle 1 and the second handle 2 form a linkage relationship due to the action of the sliding block 3, when the first handle 1 is held, the second handle 2 is rotated from the safety position to the firing position by the rotation of the first handle 1, and the second end of the second handle 2 is contacted with the firing block 55 of the anastomat, so that the anastomat is fired. The second end of the first handle 1 supports against the pull tab in the rotating process in the firing process, so that the pull tab is raised and separated from the pointer 4, and the pointer 4 is reset under the action of the pointer resetting mechanism.

After the firing is completed, when the first handle 1 is not reset and the pointer 4 is reset, that is, when the user still maintains the holding state, the handle assembly is structured as shown in fig. 17. At this point the second end 42 of the pointer 4 is reset to the first location area. The slider 3 is not yet reset due to the restraining effect of the handle guide 26 on the slider guide 32. At this time, if the first handle 1 is released, after the first handle 1 rotates back to the original position, the slider 3 can return to the first section of the chute 17 under the action of the slider reset torsion spring 16, and the second handle also rotates clockwise under the restoring force of the second torsion spring 25 to return to the safety position.

As shown in fig. 18, the slide is located further away from the second section of the chute 17 and the first handle 1 is not rotated. The second end 42 of the pointer 4 enters the second location area L and is further to the right than the location of the second end 42 of the pointer 4 in fig. 14, and the first end 41 of the pointer 4 is further to the left, which pushes the slider 3 closer to the second end face of the chute 17. As shown in fig. 19, the slider guide 32 and the handle guide 26 have more overlapping portions projected in the moving direction along the chute 17, and the first handle 1 and the second handle 2 have more reliable connection.

As shown in fig. 20, as the first handle 1 rotates, the first handle 1 and the second handle 2 are in linkage relation with each other due to the sliding block 3, so that the rotation of the first handle 1 also drives the second handle 2 to rotate from the safety position to the firing position, and the second end of the second handle 2 is contacted with the firing block 55 of the anastomat, thereby completing the firing of the anastomat.

After the firing is completed, when the first handle 1 is not reset and the pointer 4 is reset, the handle assembly is structured as shown in fig. 21. The procedure is the same as when the pointer 4 just entered the green area and is not repeated here.

The embodiment of the invention also provides a anastomat, which comprises a 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 pointer movable between a first location area and a second location area;

a first handle and a second handle;

the sliding groove comprises a first section and a second section which are communicated, the sliding groove is positioned on the first handle, and the sliding block can move in the sliding groove; 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;

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 is in contact with the second handle and drives the second handle to move from the safety position to the firing position.

2. 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.

3. 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.

4. The handle assembly according to claim 3, wherein the first pin shaft and the second pin shaft are respectively sleeved with a first torsion spring and a second torsion spring, two ends of the first torsion spring are respectively abutted against the first handle and the second handle, and two ends of the second torsion spring are respectively abutted against the second handle and a shell of the anastomat.

5. The handle assembly of claim 1, further comprising a slider return spring, wherein the slider applies a force to the slider return spring to place the slider return spring in a deformed state; when the sliding block reset spring is restored to the initial state from the deformed state, the sliding block is driven to move from the second section of the sliding groove to the first section of the sliding groove.

6. The handle assembly of claim 5, wherein the slider return spring is a slider return torsion spring having first and second ends abutting the slider and the second handle, respectively.

7. The handle assembly of claim 1, wherein the second handle comprises a handle guide; the sliding block comprises a sliding part and a sliding block guiding part, and the sliding part can move in the sliding groove;

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 abutted against the handle guide part.

8. The handle assembly of claim 7, wherein the handle guide includes first and second handle guide surfaces that abut each other, the slider guide including a guide section that includes first and second slider guide surfaces that abut each other; when the slider guide part is abutted against the handle guide part, the second slider guide surface and the second handle guide surface are corresponding in position and parallel to each other.

9. The handle assembly of claim 8, wherein the second handle guide surface is at an angle of less than 90 ° to the length of the chute.

10. The handle assembly of claim 9, wherein the second slider guide surface contacts the second handle guide surface and the second slider guide surface applies a thrust force F to the second handle guide surface when the first handle is rotated in a first direction, the thrust force F comprising a component F1 and a component F2 perpendicular to each other, the component F1 being perpendicular to the second slider guide surface and f1×β < F2, where β is a coefficient of friction between the second slider guide surface and the second handle guide surface.

11. The handle assembly of claim 9, wherein the slider guide further comprises a connecting section adjacent to the guide section, the connecting section comprising a third slider guide surface, the third slider guide surface being adjacent to the second slider guide surface.

12. The handle assembly of claim 7, wherein the first handle comprises a first cavity having two side walls, one of the slide grooves being provided on each of the side walls of the first cavity, the slider comprising two sliding portions and the slider guide, the two sliding portions being movable in one of the slide grooves, respectively;

when the sliding parts are respectively positioned at the first sections of the corresponding sliding grooves and the first handles rotate along the first direction, the second handles at least partially enter the first cavity;

when the sliding parts are respectively positioned at the second sections of the corresponding sliding grooves and the first handle rotates along the first direction, the sliding block guiding parts are abutted against the second handle and prevent the second handle from continuously entering the first cavity.

13. The handle assembly of claim 12, wherein the second handle includes a second cavity having two side walls, the handle guide is located within the second cavity, and a width of the handle guide is less than or equal to a width of the slider guide.

14. The handle assembly of claim 12, wherein the slider further comprises a boss located between one of the sliding portion and the slider guide portion, a top end of the boss being provided with a recess, and a slider return torsion spring being provided between an inner surface of the recess and the second handle.

15. The handle assembly of claim 1, wherein the pointer is rotatably secured to the interior of the housing of the stapler.

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