CN117653242A

CN117653242A - Surgical instrument

Info

Publication number: CN117653242A
Application number: CN202211007622.8A
Authority: CN
Inventors: 孙宝峰; 刘向海; 刘炳华
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2024-03-08

Abstract

The invention discloses a surgical instrument, comprising: the front end component comprises a transmission shaft and is of a strip shape; a handle assembly and a housing assembly; the front end assembly includes a first mounting surface, and the housing assembly includes a first mating surface; after the front end assembly is mounted to the housing assembly, the first mounting surface is attached to the first butt joint surface; a mating member and a positioning member; the matching piece comprises a proximal matching part and a distal matching part, and the proximal matching part and the distal matching part are matched with the positioning piece to limit the front end assembly in the length direction; the housing assembly has a first side and a second side in a width direction, one of the first proximal mating portion and the first distal mating portion being located on the first side, the other being located on the second side; the locking piece is connected with the matching piece when being positioned at the locking position. After the front end assembly is mounted to the housing assembly, the positioning piece is matched with the matching piece, the front end assembly can be limited in the length direction and the width direction, the front end assembly is stably mounted on the housing assembly, and the overall stability of the surgical instrument is improved.

Description

Surgical instrument

Technical Field

The invention relates to the technical field of medical instruments, in particular to a surgical instrument.

Background

The anastomat is a device used in medicine to replace manual suturing, and mainly adopts the working principle that titanium nails are utilized to separate and anastomose tissues, is similar to a stapler, and has the advantages of convenient use, tight suturing, proper tightness, few side effects and operation complications and even realization of lesion excision of tumor patients, thus being popular and attractive to clinical surgeons at home and abroad.

The anastomat comprises: the surgical instrument comprises a jaw, a front end assembly connected with the jaw, and a handle assembly and a housing assembly connected with the front end assembly, wherein the front end assembly and the housing assembly are sterile assemblies, a battery and a motor are arranged in the handle assembly, the battery and the motor cannot be sterilized to be a sterile assembly, the housing assembly is detachably connected with the handle assembly and used for sealing the handle assembly so as to ensure the sterility of the operating environment, and the front end assembly and the housing assembly are detachably connected and locked through a locking structure, so that the surgical instrument can be reused.

After the front end component is mounted to the housing component, if the front end component is long-strip-shaped, the front end component is still possibly unstable in positioning after the locking structure is locked, and the shaking condition occurs, so that the overall stability of the surgical instrument is poor.

Accordingly, there is a need for a surgical instrument that overcomes the above-described drawbacks.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a surgical instrument, which solves the problems that after a front end component is mounted to a housing component, the positioning is unstable, shaking can occur, and the stability of the surgical instrument is poor.

The invention is realized by the following technical scheme:

a surgical instrument, comprising:

the front end assembly comprises a transmission shaft, and is of a strip shape;

a handle assembly and a housing assembly, the housing assembly comprising an upper housing and a lower housing, the upper housing being detachably connected to the lower housing to enclose the handle assembly contained within a space formed by the upper housing and the lower housing; the front end assembly having a drive shaft and the handle assembly having a drive shaft; the housing assembly has a coupling; the front end assembly includes a first mounting surface, and the housing assembly includes a first mating surface; in response to the upper housing being removably connected to the lower housing to enclose the handle assembly, the first mounting surface is mated with the first mating surface after the front end assembly is mounted to the housing assembly, the drive shaft being coupled to the drive shaft through the coupling;

The front end assembly is provided with the positioning piece; the fitting piece comprises a proximal fitting part and a distal fitting part, the proximal fitting part is arranged at the proximal end of the housing assembly, the distal fitting part is arranged at the distal end of the housing assembly, and when the first mounting surface is attached to the first abutting surface, the proximal fitting part and the distal fitting part are fitted with the positioning piece to limit the front end assembly in the length direction; the housing assembly has a first side and a second side in a width direction, the proximal mating portion includes a first proximal mating portion, and the distal mating portion includes a first distal mating portion; one of the first proximal end fitting portion and the first distal end fitting portion is located on the first side, the other is located on the second side, and when the first mounting surface is attached to the first abutting surface, the first proximal end fitting portion and the first distal end fitting portion are fitted to the positioning member to limit the front end assembly in the width direction;

the locking piece is arranged on the front end assembly and provided with a locking position and an unlocking position; in response to the engagement of the engagement member with the positioning member, the locking member in a locked position connects the engagement member such that the front end assembly is locked with the housing assembly; the locking member in the unlocked position is disengaged from the mating member such that the front end assembly is unlocked from the housing assembly.

Further, the proximal end fitting portion further includes a second proximal end fitting portion that fits with the positioning member; the first proximal mating portion is located on the first side, the second proximal mating portion is located on the second side, or the first proximal mating portion is located on the second side, and the second proximal mating portion is located on the first side.

Further, the distal end mating portion further includes a second distal end mating portion that mates with the positioning member; the first distal mating portion is located on the first side, the second distal mating portion is located on the second side, or the second distal mating portion is located on the first side, and the first distal mating portion is located on the second side.

Further, the proximal end matching part is a protrusion arranged at the proximal end of the housing assembly, and the distal end matching part is a protrusion arranged at the distal end of the housing assembly; the positioning piece comprises a plurality of positioning grooves arranged on the front end assembly; after the first butt joint surface is attached to the first installation surface, the protrusion is inserted into the positioning groove to achieve the matching of the matching piece and the positioning piece.

Further, the locking piece comprises a sliding frame and a first locking part arranged on the sliding frame, and the sliding frame can move in the front end assembly to enable the locking piece to be switched between the locking position and the unlocking position;

The protrusions are provided with clamping grooves, and after the first butt joint surface is attached to the first mounting surface, the protrusions are respectively inserted into the corresponding positioning grooves and partially enter the front end assembly, so that the clamping grooves are positioned in the front end assembly;

in the locking position, the first locking portion is inserted into the protruding clamping groove to lock the locking piece and the matching piece, so that the front end assembly and the housing assembly are locked; in the unlocked position, the first locking portion is separated from the raised detent to separate the locking member from the mating member, thereby unlocking the front end assembly from the housing assembly.

Further, the front end assembly comprises a front end body, a lower extension part connected with the far end of the front end body, and a second installation surface arranged on the lower extension part, wherein the second installation surface is connected with the first installation surface and is arranged at a first angle; the housing assembly further comprises a second abutting surface, wherein the second abutting surface is arranged at the far end of the first abutting surface and is arranged at a second angle with the first abutting surface; the first angle is equal to the second angle; after the front end assembly is mounted on the housing assembly, the first mounting surface is attached to the first butt joint surface, and the second mounting surface is attached to the second butt joint surface.

Further, the surgical instrument further comprises:

the second positioning structure comprises a second positioning piece and a second matching piece, wherein the second matching piece is arranged on the lower extension part, the second positioning piece is arranged on the housing assembly, and when the second mounting surface is attached to the second matching surface, the second matching piece is matched and positioned with the second positioning piece.

Further, the second matching piece comprises a storage groove arranged at the lower extension part and penetrating through the second mounting surface, the second positioning piece comprises a protruding part arranged at the second butt joint surface, and when the second mounting surface is attached to the second matching surface, the protruding part is embedded into the storage groove to enable the second positioning piece to be matched and positioned with the second matching piece.

Further, the surgical instrument further comprises:

the third positioning structure comprises a third positioning part and a third matching part, wherein the third matching part is arranged on the front end assembly, the third positioning part is arranged on the upper extension part, and when the third mounting surface is attached to the third butt joint surface, the third positioning part is matched and positioned with the third matching part.

Further, the third positioning part comprises a sliding groove, and the third matching part comprises a sliding block; the sliding block slides in the sliding groove to guide the front end assembly to be mounted to the housing assembly during the process of mounting the front end assembly to the housing assembly; after the front end assembly is mounted on the housing assembly, the sliding block is accommodated in the sliding groove, so that the third positioning part is matched and positioned at the third matching part.

Further, two groove wall plates are arranged on the third butt joint surface, the two groove wall plates form the sliding groove along the width direction, and the groove wall plates comprise: the first wallboard is connected to the third butt joint surface, and the second wallboard is connected to one end, far away from the third butt joint surface, of the first wallboard; the front end component is provided with a groove on the third mounting surface, and the sliding block is arranged in the groove; when the sliding block is accommodated in the sliding groove, the first wall plate limits the sliding block in the width direction so as to limit the front end assembly in the width direction; the second wall plate limits the sliding block in the length direction so as to limit the front end assembly in the length direction.

Further, the housing assembly is provided with: the two peripheral limiting parts are respectively arranged at two sides of the width direction of the housing assembly, the peripheral limiting parts extend upwards to be connected with the third butt joint surface, and when the third butt joint surface is attached to the third mounting surface, two sides of the width direction of the front end assembly are respectively attached to the two peripheral limiting parts.

Compared with the prior art, the invention has the beneficial effects that: after the front end component is mounted to the housing component, the front end component can be limited in the length direction and the width direction through the matching of the positioning component and the matching component, so that the front end component is stably mounted on the housing component, and the overall stability of the surgical instrument is improved.

Drawings

FIG. 1 is an exploded view of a surgical instrument provided in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a front end assembly according to an embodiment of the present invention;

fig. 3a is a schematic view of the structure of the lock member in embodiment 1 of the present invention in the locked position;

FIG. 3b is a partial schematic view of FIG. 3a at A;

fig. 4 is a schematic view showing the internal structure of the front end module in embodiment 1 of the present invention;

fig. 5a is a schematic view showing the structure of the lock member in embodiment 1 of the present invention in the unlock position;

FIG. 5B is a partial schematic view at B in FIG. 5 a;

FIG. 6 is a housing assembly providing a hinged connection in accordance with an embodiment of the present invention;

FIG. 7 is a housing assembly providing a snap-fit connection according to an embodiment of the present invention;

fig. 8a is a schematic view showing the bottom structure of the front end module in embodiment 1 of the present invention;

FIG. 8b is a schematic view showing the structure of the front end assembly mounted to the housing assembly when the locking member according to embodiment 1 of the present invention is in the locked position;

Fig. 9a is a schematic structural view of the front end assembly mounted to the housing assembly when the locking member provided in embodiment 1 of the present invention is in the unlocked position;

fig. 9b is a schematic structural view of the locking member abutting against the mounting portion according to embodiment 1 of the present invention;

FIG. 10a is a view showing an arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

FIG. 10b is a view showing one arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

FIG. 10c is a view showing one arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

FIG. 10d is a view showing one arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

FIG. 10e is a view showing one arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

FIG. 10f is a view showing one arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

FIG. 10g is a view showing one arrangement of the fitting provided in embodiment 1 of the present invention on the housing assembly;

fig. 10h is a schematic structural view of a peripheral side stopper provided in embodiment 1 of the present invention;

FIG. 11 is an oblique view of a front end assembly provided in embodiment 1 of the present invention;

fig. 12 is an oblique view of the housing assembly provided in embodiment 1 of the present invention;

FIG. 13 is a partial schematic view at C in FIG. 9 b;

fig. 14a is a schematic view showing the installation of a drive shaft and a propeller shaft with a coupling according to embodiment 1 of the present invention;

FIG. 14b is a schematic view showing the structure of the driving motor, the connecting structure and the driving shaft according to embodiment 1 of the present invention

Fig. 15a is a schematic view of the structure of the first part of the coupling according to embodiment 1 of the present invention;

fig. 15b is a schematic structural view of a propeller shaft provided in embodiment 1 of the present invention;

fig. 16 is an exploded view of a lock structure provided in embodiment 1 of the present invention;

FIG. 17 is an exploded view of the front end assembly and locking structure provided in embodiment 1 of the present invention;

fig. 18 is an exploded view of the frame and front end assembly provided in embodiment 1 of the present invention;

fig. 19 is a schematic view of a third fixing portion supporting frame provided in embodiment 1 of the present invention;

FIG. 20 is a schematic view showing the structure of a button and a locking member according to embodiment 1 of the present invention;

fig. 21 is a schematic view showing a structure of a button according to embodiment 1 of the present invention in an unpressed state;

fig. 22 is a schematic view showing the structure of the push button according to embodiment 1 of the present invention in the pressed position;

FIG. 23 is a schematic view of a surgical instrument according to embodiment 2 of the present invention;

FIG. 24 is an exploded view of a surgical instrument provided in accordance with embodiment 2 of the present invention;

Fig. 25 is a schematic view showing the structure of the rotary pressing member according to embodiment 2 of the present invention in the locked position;

fig. 26 is a schematic view showing the structure of the rotary pressing member according to embodiment 2 of the present invention in the unlock position.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is to be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle of a stapler. The term "proximal" refers to the portion proximal to the clinician, and the term "distal" refers to the portion distal to the clinician. I.e., the handles are proximal and the jaw assembly is distal, e.g., the proximal end of a component represents an end relatively close to the handles and the distal end represents an end relatively close to the jaw assembly. The terms "upper" and "lower" refer to the relative positions of the staple abutment and the cartridge abutment of the jaw assembly, specifically the staple abutment being "upper" and the cartridge abutment being "lower". However, the stapler can be used in many orientations and positions, and thus these terms expressing relative positional relationships are not limiting and absolute.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, movably connected, or integrated, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two elements or interaction relationship between the two elements such as abutting. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that, when the terms "connected" and "connected" are used in the meanings defined by the corresponding terms, only the cases where the terms are clearly required are excluded, and other possible cases are not excluded, such as "detachably connected" means detachably connected, not including being integrated, but movable connection and the like are not excluded.

The present application provides a surgical instrument comprising a front end assembly, a handle assembly, a housing assembly, a mating member, a positioning member, and a locking member. The handle assembly is arranged in a space formed by the upper cover shell and the lower cover shell; the front end assembly has a drive shaft, and the handle assembly has a drive shaft; the housing assembly has a coupling; the front end assembly includes a first mounting surface, and the housing assembly includes a first mating surface; in response to the upper and lower housings being detachably connected to enclose the handle assembly, the first mounting surface mates with the first mating surface after the front end assembly is mounted to the housing assembly, and the drive shaft is coupled to the drive shaft through the coupling. The front end assembly is elongated and may be mounted to the housing assembly with unstable positioning, resulting in poor overall stability of the surgical instrument. The front end assembly is provided with a locating piece, the matching piece comprises a proximal matching part and a distal matching part, the proximal matching part is arranged at the proximal end of the housing assembly, the distal matching part is arranged at the distal end of the housing assembly, the proximal matching part and the distal matching part are protrusions arranged on the housing assembly, and the locating piece is a locating ICAO arranged on the front end assembly. When the first mounting surface is attached to the first abutting surface, the proximal end matching part and the distal end matching part are matched with the positioning piece to limit the front end assembly in the length direction; the housing assembly has a first side and a second side in a width direction, the proximal mating portion includes a first proximal mating portion, and the distal mating portion includes a first distal mating portion; one of the first proximal end matching part and the first distal end matching part is positioned on the first side, the other one is positioned on the second side, and when the first mounting surface is attached to the first abutting surface, the first proximal end matching part and the first distal end matching part are matched with the positioning piece to limit the front end assembly in the width direction; the locking piece is arranged on the front end assembly and provided with a locking position and an unlocking position; in response to the engagement of the engagement member with the positioning member, the locking member in the locked position connects the engagement member such that the front end assembly is locked with the housing assembly; the locking member in the unlocked position is disengaged from the mating member such that the front end assembly is unlocked from the housing assembly. After the front end component is mounted to the housing component, the front end component can be limited in the length direction and the width direction through the matching of the positioning component and the matching component, so that the front end component is positioned, the matching component simultaneously plays a role in positioning the front end component and connecting and locking with the locking component, the front end component is stably mounted on the housing component, and the overall stability of the surgical instrument is improved.

The side portion in the present invention means one of both sides or both sides in the width direction of the front end module.

The operating member is operable to drive the locking member when operated to switch the locking member from the locked position to the unlocked position.

Embodiment 1

Embodiment 1 of the present application relates to a surgical instrument, and in particular, to an electric stapler that can be operated by a medical staff to perform a surgical operation to cut and staple tissue of a patient.

As shown in fig. 1-3 b, a surgical instrument includes:

the actuating assembly 100 comprises a jaw 110 and a sleeve member 120, wherein the jaw 110 is used for clamping tissue of a patient, a cutting knife assembly and staples are arranged in the jaw 110 and are used for cutting the tissue of the patient and suturing, and the sleeve member 120 is pivotally connected to the jaw 110 and is shaped as a tube body; the execution assembly 100 is in direct contact with patient tissue, as a sterile assembly.

Front end assembly 200 comprises a drive shaft 220 and a drive structure 210, drive shaft 220 is connected to drive structure 210, drive structure 210 is connected to sleeve member 120, torque applied to drive shaft 220 is transferred to drive structure 210, and drive structure 210 drives jaws 110 to open and close via sleeve member 120. The front end assembly 200 is connected to the sleeve member 120 as a sterile assembly.

The handle assembly 400 and the housing assembly 300, the housing assembly 300 is installed in the handle assembly 400, a driving shaft 420 and a driving structure 410 are arranged in the handle assembly 400, the driving structure 410 comprises a motor and a battery, and the driving structure 410 is used for outputting torque to drive the driving shaft 420 to rotate. Because the handle assembly 400 has a motor and battery therein, the handle assembly 400 is a sterile assembly in that it cannot be sterilized. After the cover assembly 300 is mounted on the handle assembly 400, the handle assembly 400 is covered to close the cover assembly, and then the cover assembly 300 is connected with the front end assembly 200, so that the connection and transmission of the front end assembly 200 and the handle assembly 400 are realized. The housing assembly 300 is a sterile assembly that can block bacteria of the handle assembly 400 from passing to the front end assembly 200 while allowing the front end assembly 200 and the handle assembly 400 to be connected and driven. The housing assembly 300 includes a coupling 350, the coupling 350 being connected to the drive shaft 220 and the drive shaft 420, respectively, with the drive connection of the drive shaft 420 to the drive shaft 220 being effected by the coupling 350. The housing assembly 300 is detachably connected to the handle assembly 400, and the housing assembly 300 and the front end assembly 200, thereby facilitating sterilization and maintenance of the housing assembly 300 and the front end assembly 200.

The locking structure 500 is disposed on the front end assembly 200. The locking structure 500 is used to lock the front end assembly 200 with the housing assembly 300 after the front end assembly 200 is mounted to the housing assembly 300; when the front end assembly 200 is detached, the locking structure 500 is operated to unlock the front end assembly 200 from the housing assembly 300, so that the front end assembly 200 can be separated from the housing assembly 300. The locking structure 500 includes two locking members 520 and an operating member 510 acting on the locking members 520, with the operating member 510 being at least partially located outside the front end assembly 200 for operation by a healthcare worker. The operating member 510 acts on the locking member 520 to drive the locking member 520 when operated, specifically, in such a manner that the operating member 510 abuts against the locking member 520. The locking member 520 has a locking position and an unlocking position, the locking member 520 in fig. 3a and 3b is located at the locking position, and when the locking member 520 is located at the locking position, the locking member 520 is locked to the housing assembly 300, so as to lock the front end assembly 200 and the housing assembly 300; the locking member 520 of fig. 5a and 5b is in an unlocked position, and when the locking member 520 is in an unlocked position, the locking member 520 is separated from the housing assembly 300, allowing the medical professional to remove the front end assembly 200 from the housing assembly 300.

When the electric stapler is installed, the housing assembly 300 is first installed to the handle assembly 400, the handle assembly 400 is a bacteria assembly, the housing assembly 300 needs to completely cover the handle assembly 400, and the handle assembly 400 is isolated from the outside. As shown in fig. 6 and 7, the housing assembly 300 includes: an upper housing 330 and a lower housing 340, the upper housing 330 being detachably connected to the lower housing 340, the lower housing 340 for receiving a lower portion of the handle assembly 400 so as to cover the lower portion of the handle assembly 400; the upper housing 330 is adapted to be mounted to an upper portion of the handle assembly 400, the drive shaft 420 is provided to the upper portion of the handle assembly 400, the coupling 350 is provided to the upper housing 330, the coupling 350 is coupled to the drive shaft 420 when the upper housing 330 is mounted to the upper portion of the handle assembly 400, and the upper housing 330 and the lower housing 340 cooperate to completely cover the handle assembly 400. In installing the housing assembly 300, the lower portion of the handle assembly 400 is first received within the lower housing 340, the upper housing 330 is then installed to the upper portion of the handle assembly 400, and the upper housing 330 is locked with the lower housing 340, thereby completing the installation of the housing assembly 300. In one embodiment, as shown in fig. 6, the upper housing 330 is hinged to the lower housing 340, and the upper housing 330 is connected to the lower housing 340 after being rotated. After the lower portion of the handle assembly 400 is received in the lower housing 340, the upper housing 330 is rotated to be coupled with the lower housing 340, at which time the upper housing 330 is mounted to the upper portion of the handle assembly 400, the coupling 350 is coupled with the driving shaft 420, and finally, is locked with the lower housing 340 by the locking portion 332 of the upper housing 330, thereby completing the mounting and sealing of the housing assembly 300 on the handle assembly 400. Specifically, the upper housing 330 has a head end and a tail end in the length direction X, the head end is hinged with the lower housing 340, and the locking portion 332 is disposed at the tail end; the lower housing 340 has a head end and a tail end in the length direction X, the head end is hinged with the upper housing 330, the tail end is provided with a fitting protrusion 342, the fitting protrusion 342 is used for being fixed with the locking portion 332, the locking portion 332 is a hook, the fitting protrusion 342 is a bump arranged at the tail end of the lower housing 340, and the hook is used for being buckled with the bump. Further, as shown in fig. 12, a hook may be disposed on a side surface of the lower housing 340, and a protrusion capable of being matched with the hook on the lower housing 340 may be disposed on the upper housing 330, so as to further improve the connection stability of the upper housing 330 and the lower housing 340. In another embodiment, as shown in fig. 7, the upper casing 330 and the lower casing 340 are completely separated and switched to be in snap-fit connection, the lower part of the handle assembly 400 is first accommodated in the lower casing 340, then the upper casing 330 is mounted to the upper part of the handle assembly 400 from top to bottom, the coupler 350 arranged on the upper casing 330 is connected with the driving shaft 420 of the handle assembly 400, and finally the upper casing 330 is in snap-fit connection with the lower casing 340, so as to complete the mounting of the casing assembly 300 and the handle assembly 400 and the sealing of the casing assembly 300 to the handle assembly 400.

After the housing assembly 300 is mounted on the handle assembly 400, the front end assembly 200 is connected to the housing assembly 300. As shown in fig. 8 b-9 b, the sleeve member 120 extends along a first axis OO', and the front end assembly 200 is mounted from top to bottom during mounting of the front end assembly 200 to the housing assembly 300. The bottom of the front end assembly 200 has a first mounting surface 230, and the drive shaft 220 is disposed on the first mounting surface 230. Preferably, the first mounting surface 230 is parallel to the first axis OO ', i.e., the first mounting surface 230 is a horizontal plane in the orientation shown in fig. 8b, and in other embodiments, the first mounting surface 230 may be at an angle to the first axis OO', i.e., the first mounting surface 230 is at an angle to the horizontal plane that is not equal to 0 degrees. The upper housing 330 of the housing assembly 300 has a first abutment surface 310, the first abutment surface 310 being opposite to the first mounting surface 230, and the angle between the first abutment surface 310 and the first axis OO 'being the same as the angle between the first mounting surface 230 and the first axis OO', both being 0 degrees (parallel) or non-0 degrees to ensure the stability of the mounting. After the front end assembly 200 is mounted to the housing assembly 300 along the second axis PP', the first mounting surface 230 is attached to the first docking surface 310 to achieve stability in mounting the front end assembly 200 to the housing assembly 300, and the driving shaft 220 on the first mounting surface 230 is connected to the coupling 350 on the first docking surface 310 to achieve driving connection of the front end assembly 200 to the handle assembly 400, i.e., the driving shaft 420 is connected to the driving shaft 220 through the coupling 350, so that the driving shaft 420 can drive the driving shaft 220 through the coupling 350. The axis of the driving shaft 220 is parallel to the second axis PP ', the driving shaft 220 protrudes from the first mounting surface 230, and the second axis PP ' is perpendicular to the first axis OO '.

As shown in fig. 14a, the transmission structure 210 in this embodiment includes a gear set 211, a rack 212, a connecting rod and a sliding block 2213, the gear set 211 is connected to the transmission shaft 220, the rack 212 is meshed with the gear set 211, and the length direction X of the rack 212 is disposed along the first axis OO ', so that the axis of the transmission shaft 220 connected to the gear set 211 is perpendicular to the first axis OO'. The gear set 211 includes: a first gear coupled to the drive shaft 220, a second gear engaged with the first gear, and a third gear engageable with the second gear, the third gear being engaged with the rack 212. When the transmission shaft 220 rotates, torque is transmitted to the second gear through the first gear, and the second gear is in transmission connection with the jaw assembly and can drive the jaw assembly to open and close. The third gear is meshed with the rack 212, the rack 212 is connected with a cutting knife assembly, the cutting knife assembly comprises a mandrel connected with the rack 212, and a cutter bar and a cutter head connected with the mandrel, and the rack 212 can drive the cutter bar and the cutter head to move through the mandrel when moving forwards and backwards. The second gear comprises a first clutch piece and a second clutch piece, the first clutch piece and the second clutch piece are coaxially arranged, the first clutch piece comprises a first effective rotating range structure and a first idle rotating range structure, and the second clutch piece comprises a second effective rotating range structure and a second idle rotating range structure. When the first effective transfer structure of the first clutch member is meshed with the first gear, so that the first clutch member is driven by the first gear to drive the jaw assembly to move, the second idle transfer structure of the second clutch member is coupled with the third gear, so that the third gear cannot be driven, and the rack 212 cannot be driven; in this embodiment, the first clutch is connected to the proximal end of the sleeve 110 by a link, slide 2213, and drives the movement of the sleeve 110; the distal end of the cannula 110 is pivotally connected to the jaw assembly, with movement of the cannula 110 effecting movement of the jaw assembly. When the first idle stroke feature of the first clutch is coupled to the first gear such that the jaw assembly is not movable, the second active stroke feature of the second clutch is engaged with the third gear such that the rack 212 can be driven. That is, the sleeve 120 and the rack 212 are alternatively driven by the first clutch and the second clutch, and the jaw assembly and the cutter assembly are alternatively driven. Coupling refers to the termination of the mating due to the lack of structure for the mating due to a change in relative position or state between the mating components. The relative position changes include, but are not limited to, the following: the components are rotated relative to each other. Specific structure may be found in applicant's prior application 202210086078.4 and will not be described in detail herein.

Since the rack and pinion structure is a reliable transmission way for driving the cutter assembly, the transmission structure 210 has the gear set 211 and the rack 212, the length direction X of the rack 212 is parallel to the first axis OO 'of the sleeve 120, when the rack 212 is meshed with the gear set 211, the axis direction of the gear set 211 is perpendicular to the length direction X of the rack 212, so that the axes of the gear set 211 and the transmission shaft 220 are parallel to the second axis PP', the transmission shaft 220 is the simplest and most reliable choice of the transmission structure 210 along the second axis direction, the problem that the transmission structure is complicated and the reliability is low due to the additional arrangement of the steering structure is avoided, the transmission shaft 220 is connected with the coupling 350 along the second axis PP ', and the front end assembly 200 is mounted to the housing assembly 300 along the second axis PP'.

The coupling 350 is disposed along the second axis PP', and during installation of the front end assembly 200 to the housing assembly 300, the coupling 350 is engaged with the drive shaft 220 in the second direction, the coupling 350 is disposed on the first engagement surface 310 and extends through the first engagement surface 310, and the coupling 350 includes a first portion 351 and a second portion 352, the first portion 351 being at least partially disposed outside the housing assembly 300, i.e., above the first engagement surface 310, for coupling with the drive shaft 220.

Meanwhile, as shown in fig. 14a and 14b, the driving shaft 420 is also disposed along the second axis PP ', after the handle assembly 400 is mounted to the housing assembly 300, the driving shaft 420 can be connected with the coupling 350 along the direction of the second axis PP ', and the driving shaft 220, the coupling 350 and the driving shaft 420 are coaxially disposed, so that when the front end assembly 200 is mounted along the direction of the second axis PP ', the driving shaft 220 and the coupling 350, and the coupling 350 and the driving shaft 420 can be smoothly connected, thereby ensuring the driving effect. The driving structure 410 includes: a drive motor 4101 and a connection assembly 4102, the connection assembly 4102 being connected to an output shaft of the drive motor 4101 and to the drive shaft 420. The drive motor 4101 is connected to the drive shaft 420 via the connection assembly 4102, and can drive the drive shaft 420 to rotate.

In this embodiment, the driving motor 4101 is disposed at the rear side of the handle assembly 400, and the output shaft is disposed along a third axis, which is parallel to the first axis OO ', i.e. perpendicular to the second axis PP'. The coupling assembly 4102 comprises a first bevel gear 41021 and a second bevel gear 41022 intermeshed, the first bevel gear 41021 being arranged along a third axis and being coupled to the output shaft, and the second bevel gear 41022 being arranged along a second axis PP' and being coupled to the drive shaft 420. The arrangement of the first bevel gear 41021 and the second bevel gear 41022 serves to change the direction of the torque output from the output shaft, transmitting the torque output along the third axis to the drive shaft 420 arranged along the second axis PP'. In other embodiments, the driving motor 4101 may be disposed at other positions of the handle assembly 400, and the axial direction of the output shaft may be other, which will not be described herein.

The front end assembly 200 is moved in the axial direction of the transmission shaft 220, i.e., is mounted to the housing assembly 300 in the direction of the second axis PP', and the coupling 350 is coaxially coupled with the driving shaft 420 after the housing assembly 300 is mounted to the handle assembly 400; during the mounting of the front end assembly 200 to the housing assembly 300, the axis of the drive shaft 220 coincides with the axis of the coupling 350, and the drive shaft 220 and the coupling 350 are connected in the direction of the second axis PP'.

In the locking structure 500 of the present embodiment, the two locking members 520 are located on one side and the other side of the front end assembly 200 in the width direction Y, the operating member 510 is disposed on the side of the front end assembly, and the front end assembly 200 is generally elongated, the length direction X of the front end assembly 200 is parallel to the first axis OO', the direction in which the front end assembly 200 is mounted to the housing assembly 300 is the thickness direction Z, and the width direction Y of the front end assembly 200 is perpendicular to the length direction X and the thickness direction Z. When the front end assembly 200 is taken and moved, a medical staff generally pinches from the left side and the right side of the front end assembly 200, namely, from the two sides in the width direction Y, and at least one of the left side and the right side is provided with an operation member 510, so that the medical staff can directly operate the buttons on the side of the front end assembly 200 when the front end assembly 200 is taken, thereby improving the operation convenience. Therefore, when the medical staff dismantles the front end assembly 200, he can operate the operation member 510 at the side of the front end assembly 200 by holding the front end assembly 200, and dismount the front end assembly 200 on the housing assembly 300 by unlocking the locking structure 500.

In one embodiment, the locking structure 500 includes an operating member 510, where the operating member 510 is disposed on a side of the front end assembly 200, and a medical staff member can directly operate the operating member 510 when pinching the front end assembly 200. The two locking members 520 are connected to each other, the operating member 510 acts on any one of the locking members 520, and when the operating member 510 is operated, the locking member 520 which drives the operation thereof is switched from the locking position to the unlocking position, and the locking member 520 drives the other locking member 520 to be synchronously switched from the locking position to the unlocking position. That is, an operating member 510, when operated, can simultaneously drive two locking members 520 to switch from the locked position to the unlocked position, thereby effecting locking and unlocking of the front end assembly 200 to the housing assembly 300.

In a preferred embodiment, the locking structure includes two operating members 510, two operating members 510 being provided on both sides of the front end assembly 200 in the width direction Y, and two locking members 520 being provided, one operating member 510 being connected to one locking member 520 and the other operating member 510 being connected to the other locking member 520. The medical staff can operate the two operating members 510 simultaneously when pinching the front end assembly 200, and the two operating members 510 respectively drive the acting locking members 520, so that the two locking members 520 are switched from the locking position to the unlocking position, and further the locking and unlocking of the front end assembly 200 on the housing assembly 300 are realized.

Wherein the operation member 510 is operated to move the locking member 520 from the locking position to the unlocking position in a first direction, which is a direction along the width of the front end assembly 200, parallel to the width direction Y. Because front end assembly 200 is rectangular shape setting, medical personnel can pinch the both sides of front end assembly 200 through the finger when taking front end assembly 200, and the direction that the finger was pinched is roughly along first direction, and medical personnel can be along first direction application of force to operate operating member 520 when holding front end assembly 200, and is very convenient. Optionally, the first direction is perpendicular or intersects the second direction. In the present embodiment, the first direction is parallel to the width direction Y, the second direction is parallel to the length direction X, and the first direction is perpendicular to the second direction. Of course, in other embodiments, the first direction may be offset relative to the width direction Y of the front end assembly 200, ensuring that the first direction is generally along the width direction Y of the front end assembly 200.

As shown in fig. 16 to 22, the locking structure 500 further includes a frame 540, an elastic member 530 coupled to the frame 540, the locking member 520 slidably coupled to the frame 540, and the elastic member 530 coupled between the frame 540 and the locking member 520. The frame 540 is fixedly arranged on the front end assembly 200, the locking piece 520 and the frame 540 can move relatively, specifically, the locking piece 520 is connected with the frame 540 in a sliding manner, and the locking piece 520 can stretch and retract through sliding relatively with the frame 540. The elastic member 530 is connected between the frame 540 and the locking member 520, the elastic force provided by the elastic member 530 has the same direction as the direction in which the locking member 520 moves toward the locking position, and the elastic force provided by the elastic member 530 can maintain the locking member 520 at the locking position.

Further, as shown in fig. 17 to 19, the frame 540 includes a first end 541, a second end 542, and a frame body 543 connected between the first end 541 and the second end 542, the first end 541 is provided with a sliding slot 5411, and the frame 540 is slidably connected to the locking member 520 through the sliding slot 5411. The front end assembly 200 includes a first fixing portion 260, a second fixing portion 270, and a third fixing portion 280, the first fixing portion 260 and the second fixing portion 270 are disposed on a bottom surface of the front end assembly 200, the third fixing portion 280 is disposed on a top surface of the front end assembly 200, the first fixing portion 260 and the second fixing portion 270 are spaced apart by a certain distance, and are respectively used for fixing a first end 541 and a second end 542 of the frame body 540, the first fixing portion 260 includes a first groove 261, and the first end 541 is accommodated in the first groove 261 and is in interference fit with the first groove 261; the second fixing portion 270 includes a second groove 271, and the second end 542 is received in the second groove 271 and is interference fit with the second groove 271. Meanwhile, the top of the frame 540 is pressed by the third fixing part 280, and both the upper and lower sides of the frame 540 are limited, so that the frame is stably fixed in the front end assembly 200. The frame body 543 extends along a path higher than the first end 541 and the second end 542, so that the frame body 540 forms an accommodating space 5431 for accommodating the locking member 520.

The locking member 520 includes a rod 521, first locking portions provided at both ends of the rod 521, and a main body portion 523 provided at the rod 521, the first locking portions being specifically an extension portion 522, the rod 521 being slidably mounted in the sliding slot 5411, so that the locking member 520 is slidable relative to the frame 540, the extension portion 522 being provided protruding from the rod 521 in a second direction, the protruding direction being the same as the sliding direction of the locking member 520, the extension portion 522 being configured to be inserted into the clamping slot 312; the main body 523 is disposed in the middle of the rod 521, and is generally square with a chamfer, although the shape of the main body 523 may be other, and is not particularly limited in this embodiment. The shape of the main body 523 cooperates with the frame body 543, the main body 523 includes a through hole 5230, the passive inclined plane 5231 is disposed on a hole wall of the through hole 5230 of the main body 523, the frame body 543 of the frame 540 is also provided with a frame inclined plane 5432, the frame inclined plane 5432 is used for giving way to a component in the front end assembly 200, and when the operation member 510 is operated, the frame inclined plane 5432 is not in contact with the operation member 510. The elastic member 530 is connected between the frame body 543 and the main body 523 in the accommodating space 5431.

Specifically, the operating member 510 is a button 511, which protrudes partially from both sides of the front end assembly 200 in the width direction Y, the button 511 is movably mounted to the front end assembly 200 in the width direction Y of the front end assembly 200, the button 511 moves along the width direction Y of the front end assembly 200 when pressed, and the button 511 is switched between a first position and a second position, and is positioned in the second position when pressed and in the first position when released. When holding the front end assembly 200, the medical staff can directly press the button 511 by fingers to operate the operation member 510, so that the whole operation is very convenient. As shown in fig. 16 and 17, the locking member 520 includes a through hole 5230, a passive inclined plane 5231 is disposed on a hole wall at a proximal end of the through hole 5230, the through hole 5230 is used for providing an operation space for the button 511, the button 511 abuts against the passive inclined plane 5231, and when the button 511 is pressed to switch from the first position to the second position, the button 511 abuts against the passive inclined plane 5231 to move the passive inclined plane 5231, and further the locking member 520 is driven to switch from the locking position to the unlocking position through the passive inclined plane 5231, and simultaneously the elastic member 530 is compressed. When the button 511 is released, the elastic member 530 rebounds to drive the locking member 520 to move from the unlocking position to the locking position, and the button 511 is rebounded by pushing the button 511 by the passive inclined surface 5231 during the movement of the locking member 520. Further, referring to fig. 16 to 22, a protrusion 5111 is provided on a side of the button 511 near the locking member 520, the protrusion 5111 has a mating inclined surface 5112, the inclination angle of the mating inclined surface 5112 is the same as that of the passive inclined surface 5231, and when the button 511 is pressed or rebounded, the locking member 520 is driven to move from the locking position to the unlocking position by the mating of the mating inclined surface 5112 and the passive inclined surface 5231, and the button 511 is prevented from being mutually stuck with the locking member 520 when the button 511 is pressed or rebounded.

When the button 511 is pressed, the button 5101 and the engagement inclined surface 5112 thereof move in the direction of the arrow in fig. 21, and the engagement inclined surface 5112 and the passive inclined surface 5231 are engaged to drive the locking member 520 to slide relative to the frame 540, compressing the elastic member 530 and the locking member 250 to slide from the locking position to the unlocking position, as shown in fig. 20 to 22. When the button 511 is released, the elastic member 530 rebounds, pushing the locking member 250 to slide with respect to the frame 540, and sliding the locking member 250 from the unlocking position to the locking position. Fig. 17 to 19 show the lock 520 and the operation member 510 on one side of the front end module 200 in the width direction Y, and the lock 520 and the operation member 510 on the other side in the width direction Y are configured and function in the same manner. In the present embodiment, as shown in fig. 4 and 9a, a first direction in which the operation member 510 is operated is parallel to the width direction Y of the front end module 200, a second direction in which the locking member 520 is extended and contracted is parallel to the length direction X of the front end module 200, and the first direction is perpendicular to the second direction. The telescoping direction of the locking member 520 is parallel to the length direction X of the front end assembly 200 such that the movement space of the locking member 520 is disposed along the length direction X, and the elongated structure of the front end assembly 200 easily provides the space disposed along the length direction X.

In this embodiment, the housing assembly 300 has a receiving portion, the operating member 510 is used to drive the locking member 520 to stretch and retract, and when the operating member 510 is located at the first position, as shown in fig. 3, the locking member 520 is located at the locking position, and is partially embedded in the receiving portion; when the operating member 510 is in the second position, as shown in fig. 5a, the locking member 520 is in the unlocked position and is disengaged from the receiving portion. Specifically, the receiving portion is a slot 312. Referring to fig. 3a to 5b, after the locking member 520 is connected to the receiving portion, specifically, is inserted into the clamping slot 312, and is kept in the locking position by the elastic force of the elastic member 530, so as to keep the front end assembly 200 in a locked state. When the locking member 520 moves to the unlocking position, the locking member 520 is disengaged from the locking groove 312, and the elastic member 530 compresses the energy storage. When the operation member 510 is not operated, the locking member 520 is located at the locking position; when the operation member 510 is operated, the locking member 520 is driven to move to the unlocking position, and the elastic member 530 is compressed to store energy; the operating member 510 is released again, and the elastic force of the elastic member 530 pushes the locking member 520 to move to the locking position, thereby achieving locking.

As shown in fig. 3b, 5b, and 8a to 12, the housing assembly 300 includes a mounting portion 311 protruding from the mounting portion 311, and a slot 312 disposed in the mounting portion 311, wherein a depth direction of the slot 312 is parallel to a telescopic direction of the locking member 520. The first mounting surface 230 is provided with a mounting hole 231, and the mounting portion 311 corresponds to the mounting hole 231 and is inserted into the mounting hole 231 when the front end module 200 is mounted to the housing module 300, and the mounting portion 311 is completely inserted into the mounting hole 231 and is then received by the mounting hole 231, the locking member 520 is inserted into the locking groove 312 of the mounting portion 311 in the front end module 200, after the mounting portion 311 is completely inserted into the mounting hole 231, and the locking member is positioned in the front end module 200. When the operation member 510 is not operated during the process of mounting the front end assembly 200 to the housing assembly 300, the locking member 520 is located at the locking position, and at this time, a part of the projection of the locking member 520 on the housing assembly 300 falls onto the mounting portion 311, and during the process of moving the front end assembly 200, the locking member 520 abuts against the mounting portion 311 to block the mounting portion 311 from entering the mounting hole 231, so that the front end assembly 200 cannot be mounted continuously.

As shown in fig. 9a and 19, the medical staff can operate the operation member 510 during the installation of the front end assembly 200 to move the locking member 520 to the release position, and when the locking member 520 is maintained at the release position, the projection of the locking member 520 on the housing assembly 300 does not intersect with the installation portion 311, so that the front end assembly 200 can be smoothly installed on the housing assembly 300 in the installation direction. After the first mounting surface 230 of the front end module 200 is attached to the first abutting surface 310 of the housing module 300 as shown in fig. 5a and 5b, the locking member 520 in the unlocked position is aligned with the locking groove 312 of the mounting portion 311, and at this time, the operating member 510 is released, and as shown in fig. 3a and 3b, the locking member 520 is ejected and inserted into the locking groove 312 by the elastic member 530, specifically, the protruding portion 522 is inserted into the locking groove 312, and the locking state is switched to complete the locking of the front end module 200 and the housing module 300.

In another embodiment, as shown in fig. 9b and 13, the locking member 520 is provided with a first inclined surface 5221, the first inclined surface 5221 is provided on the protruding portion 522 of the locking member 520 and is located at the lower side of the end portion of the protruding portion 522, the lower side is the lower side position of the protruding portion 522 in fig. 13, that is, the side facing the housing assembly 300 moves toward the housing assembly 300 along the mounting direction of the front end assembly 200 during the mounting of the front end assembly 200 to the housing assembly 300, and the first inclined surface 5221 is located at the side of the locking member 520 facing the housing assembly 300 and is first contacted with the mounting portion 311; in the case that the button 511 is not pressed, a portion of the locking member 520 projected on the cover assembly 300 falls on the mounting portion 311, and during the mounting of the front end assembly 200, the locking member 520 is abutted against the mounting portion 311 through the first inclined surface 5221, and the locking member 520 moves to the unlocking position under the guidance of the first inclined surface 5221, and compresses the elastic member 530, so that the locking member 520 can pass through the mounting portion 311; when the locking member 520 is opposite to the groove of the mounting portion 311, the locking member 520 moves to the locking position by the elastic member 530 and is inserted into the locking groove 312, thereby locking the front end assembly 200 and the housing assembly 300. Further, the mounting portion 311 may be provided with a second inclined surface 313, and when the locking member 520 is relatively moved by the first inclined surface 5221 and the mounting portion 311, the first inclined surface 5221 is attached to the second inclined surface 313, thereby improving the guiding effect. In this embodiment, the front end assembly 200 is installed without the need for a medical staff to operate the operation portion, and the front end assembly 200 and the housing assembly 300 can be installed by continuously pressing down the front end assembly 200.

As shown in fig. 8b and 9a, the front end assembly 200 is generally elongated, and when it is mounted on the housing assembly 300, the poor positioning effect may cause unstable cooperation between the front end assembly 200 and the housing assembly 300, and the front end assembly 200 may shake. In this embodiment, the surgical instrument includes a mating member and a positioning member, the front end assembly 200 is provided with the positioning member, and the housing assembly 300 is provided with the mating member. After the first abutment surface 310 abuts the first mounting surface 230, the mating and locating members mate to locate the front end assembly 200.

After the front end assembly 200 is mounted to the housing assembly 300, the mating members and the positioning members cooperate to limit the front end assembly 200 in the length direction X and the width direction Y to position the front end assembly 200. At this time, the first mounting surface 230 may be attached to the first abutting surface 310. In this embodiment, the fitting member is a protrusion, specifically, a mounting portion 311 disposed on the first abutting surface 310, and the positioning member is a positioning groove disposed on the front end assembly 200, specifically, a mounting hole 231 disposed on the first mounting surface 230, and the mounting portion 311 is inserted into the mounting hole 231 to realize the matching of the protrusion and the positioning groove, so as to realize the matching of the fitting member and the positioning member, and realize the limitation of the front end assembly 200 in the length direction X and the width direction Y, so as to position the front end assembly 200.

The mating member includes a proximal mating portion 3112 and a distal mating portion 3111, the proximal mating portion 3112 being disposed at a proximal end of the housing assembly 300, specifically the mounting portion 311 being disposed at a proximal end of the first abutment surface 310; the distal mating portion 3111 is disposed at a distal end of the housing assembly 300, and specifically, the mounting portion 311 is disposed at a distal end of the first abutment surface 310. The positioning member is a mounting hole 231 provided on the first mounting surface 310 and corresponding to the proximal engaging portion 3112 and the distal engaging portion 3111. The opposite directions of the near end and the far end are the length direction X of the housing assembly, the mounting part at the near end and the mounting part at the far end are respectively inserted into the corresponding mounting holes, and the front end assembly is limited in the length direction X.

The housing assembly 300 has a first side and a second side in the width direction Y such that the first mating surface has a first side and a second side, one of the proximal mating portion 3112 and the distal mating portion 3111 being located on the first side and the other being located on the second side. That is, the first side and the second side are respectively provided with an installation portion 311, the opposite direction of the first side and the second side is the width direction Y of the housing assembly 300, and the installation portions 311 of the first side and the second side are respectively inserted into the corresponding installation holes 231 to limit the front end assembly 200 in the width direction Y.

The matching piece and the positioning piece are arranged in the above manner, so that the front end assembly 200 can be limited in the length direction X and the width direction Y, the front end assembly 200 is positioned, and the front end assembly 200 is stably mounted on the housing assembly 300. Positioning means here position retention.

In one embodiment, as shown in fig. 9a, 10a and 10b, the fitting member includes two mounting portions 311, which are a first proximal fitting portion 31121 provided at a proximal end and a first distal fitting portion 31111 provided at a distal end, respectively, one of the first proximal fitting portion 31121 and the first distal fitting portion 31111 is provided at a first side, the other is provided at a second side, the two mounting portions 311 are provided at two opposite corners of the first abutting surface 310, and after the two mounting portions 311 are inserted into the corresponding mounting holes 231, the front end assembly 200 can be limited in the length direction X and the width direction Y, so that the front end assembly 200 is stably mounted on the housing assembly.

In another embodiment, as shown in fig. 9a, 10c and 10d, the proximal mating segment 3112 further includes: the second proximal mating portion 31122, the mating member includes three mounting portions 311, respectively: the first proximal fitting portion 31121, the second proximal fitting portion 31122 and the first distal fitting portion 31111, the first proximal fitting portion 31121 and the second proximal fitting portion 31122 are respectively disposed on the first side and the second side, the first distal fitting portion 31111 is disposed on the first side or the second side, and after the three mounting portions 311 are inserted into the corresponding mounting holes 231, the front end assembly 200 can be limited in the length direction X and the width direction Y, so that the front end assembly 200 can be stably mounted on the housing assembly 300.

In other embodiments, as shown in fig. 9a, 10e and 10f, the distal mating portion 3112 further includes: the second distal mating portion 31112, the mating member includes three mounting portions 311, respectively: the first proximal fitting portion 31121, the first distal fitting portion 31111 and the second distal fitting portion 31112 are respectively provided on the first side and the second side, the first proximal fitting portion 31121 is provided on the first side or the second side, and after the three mounting portions 311 are inserted into the corresponding mounting holes 231, the front end assembly 200 can be limited in the length direction X and the width direction Y, so that the front end assembly 200 can be stably mounted on the housing assembly 300.

In other embodiments, as shown in fig. 9a and 10g, the mating member includes four mounting portions 311, respectively: the first proximal mating portion 31121, the second proximal mating portion 31122, the first distal mating portion 31111 and the second distal mating portion 31112 are disposed on the first side and the second side, respectively, and the first proximal mating portion 31121 and the second proximal mating portion 31122 are disposed on the first side and the second side, respectively. The four mounting portions 311 are provided at four corners of the first abutting surface, respectively, and after the four mounting portions 311 are inserted into the corresponding mounting holes 231, the front end module 200 can be restrained in the longitudinal direction X and the width direction Y, so that the front end module 200 can be stably mounted on the housing module 300.

In one embodiment, as shown in fig. 8b, 11 and 12, the front end assembly 200 comprises: the front end body 201 and the lower extension 202 connected to the front end body 201, the lower extension 202 is disposed at the distal end of the front end assembly 200, and the front end assembly 200 further includes a second mounting surface 250, the second mounting surface 250 being located at the lower extension 202. The housing assembly 300 further includes: a second abutment surface 360, the second abutment surface 360 being located at the distal end of the housing assembly 300. After the front end assembly 200 is mounted to the housing assembly 300, the first abutting surface 310 is attached to the first mounting surface 230, the second abutting surface 360 is attached to the second mounting surface 250, and therefore the front end assembly 200 is further limited, and the position stability of the front end assembly 200 is further improved. The second mounting surface 250 is perpendicular to the first mounting surface 230 or intersects the first mounting surface 230, and preferably, in this embodiment, the second mounting surface 250 is perpendicular to the first mounting surface 230, and both are in an "L" shape. The second abutting surface 360 is perpendicular to or intersects the first abutting surface 310, preferably, the second abutting surface 360 is perpendicular to the first abutting surface 310, and the first abutting surface 310 and the second abutting surface 360 are also in an "L" arrangement. The first abutting surface 310 is abutted with the first mounting surface 230 along the second axis PP', and the second abutting surface 360 is abutted with the second mounting surface 250 along the direction perpendicular to or at an angle to the second axis, so that the front end assembly 200 receives the abutting force from the two mutually angled directions, and the stability of the front end assembly 200 is further improved.

Further, as shown in fig. 8b, the surgical instrument further includes a second positioning structure including a second positioning portion and a second mating portion, where the second mating portion is disposed on the lower extension 202, and the second positioning portion is disposed on the housing assembly 300, and when the second mounting surface 250 is engaged with the second abutting surface 360, the second positioning portion is cooperatively positioned with the second mating portion, so as to position the front end assembly 200 at the distal end, thereby preventing the front end assembly 200 from shaking at the distal end, and further improving the stability of the front end assembly 200.

Specifically, referring to fig. 11 and 12, the second mating member includes a receiving groove 251 disposed on the second mounting surface 250, and the second positioning member includes a protruding portion 362 disposed on the second docking surface 360, and after the second docking surface 360 is attached to the second mounting surface 250, the protruding portion 362 is embedded in the receiving groove 251 to lock the second positioning member and the second mating member, so as to position the front end assembly 200 at the distal end.

The receiving groove 251 is opened in a depth direction perpendicular to the second mounting surface 250, and extends along a second axis PP ', and the receiving groove 251 penetrates the lower extension 202 on the second axis PP'. The boss 362 is provided on the second abutment surface 360 and projects outwardly of the housing assembly 300.

In the process of mounting the front end assembly 200 to the housing assembly 300, the second abutment surface 360 and the second mounting surface 250 are gradually moved closer together on the second axis PP', which means that the second abutment surface 360 and the second mounting surface 250 are moved in a direction of being completely abutted against each other, including a process of separating the second mounting surface 250 from contact with the second abutment surface 360, and a process of gradually increasing an abutment area of the second abutment surface 360 and the second mounting surface 250. In this process, the protruding portion 362 corresponds to the receiving groove 251 of the lower extension 202, and the receiving groove 251 penetrates the bottom of the lower extension 202 to ensure smooth installation, so as to avoid interference between the protruding portion 362 and the lower extension 202.

The protruding portion 362 cooperates with the accommodating groove 251 after entering the accommodating groove 251, so that locking cooperation of the second positioning piece and the second matching piece is realized, and the cooperation position of the protruding portion 362 and the accommodating groove 251 is located at the distal end of the front end assembly 200, so that the distal end of the front end assembly 200 is prevented from shaking, and the front end assembly 200 is more stably connected with the housing assembly 300.

The boss 362 specifically includes two correspondingly disposed side walls 3621, a top wall 3622 and a bottom wall 3623 connected between the side walls 3621, and the side walls 3621, the top wall 3622 and the bottom wall 3623 are all connected to the second abutment surface 360. The protruding portion 362 is hollow, and is a frame surrounded by the top wall 3622, the bottom wall 3623 and the two side walls 3621, so that the hollow structure can save materials on the basis of ensuring the matching of the protruding portion 362 and the accommodating groove 251, and avoid the occurrence of other position missing caused by larger volume of the position during injection molding. The receiving groove 251 has two inner walls 2511, and when the front end module 200 is mounted, after the protruding portion 362 enters the receiving groove 251, the two side walls 3621 of the protruding portion 362 are respectively attached to the two inner walls 2511 of the receiving groove 251, so that the stability of movement of the front end module 200 is further improved. After the front end assembly 200 is mounted on the housing assembly 300, the two side walls 3621 of the protruding portion 362 are attached to the inner wall 2511 of the receiving groove 251, so as to prevent the front end assembly 200 from rotating about the first axis OO' and shaking in the width direction Y; the outer wall 2021 of the lower extension 202 is an arc wall, the outer wall 2021 is partially missing due to the fact that the accommodating groove 251 penetrates through the bottom of the lower extension 202, the bottom wall 3623 of the protruding portion 362 is arc-shaped, the radian of the bottom wall 3623 is identical to that of the missing portion of the outer wall 2021 of the lower extension 202, after the two side walls 3621 of the protruding portion 362 are completely attached to the inner wall 2511 of the accommodating groove 251, the bottom wall 3623 of the protruding portion 362 is connected with the outer wall 2021 of the lower extension 202, and the missing portion of the outer wall 2021 of the lower extension 202 is complemented, so that the shape of the lower extension 202 is complete. On the second axis PP', the boss 362 is provided below the hinge 361, without affecting the rotation of the upper housing 330, while allowing the bottom wall 3623 to cooperate with the outer wall 2021 of the lower extension 202.

In the embodiment where the upper casing 330 is hinged to the lower casing 340, a hinge 361 is connected between the upper casing 330 and the lower casing 340, so that the upper casing 330 is connected to the lower casing 340 after rotating, and the hinge 361 is disposed on the second abutting surface 360 and above the protruding portion 362, so as to prevent the protruding portion 362 from blocking the relative rotation of the upper casing 330 and the lower casing 340. When the second abutting surface 360 is attached to the second mounting surface 250, the hinge portion 361 is received in the receiving groove 251, so that the second mounting surface 250 and the second abutting surface 360 are ensured to be attached smoothly, and the front end assembly 200 can be mounted on the housing assembly 300 stably.

In another embodiment, as shown in fig. 8-9 b, the front end assembly 200 has a third mounting surface 240, the third mounting surface 240 being located at the proximal end of the front end assembly 200; the housing assembly 300 includes a housing body 301 and an upper extension 302, the upper extension 302 being located at a proximal end of the housing assembly 300, the upper extension 302 having a third abutment surface 320 such that the third abutment surface 320 is located at the proximal end of the housing assembly 300; after the front end assembly 200 is mounted on the housing assembly 300, the first mounting surface 230 is attached to the first abutting surface 310, and the third mounting surface 240 is attached to the third abutting surface 320, so that the front end assembly 200 is further limited, and the position of the front end assembly 200 is kept stable.

The third mounting surface 240 is perpendicular to the first mounting surface 230 or intersects the first mounting surface 230, and preferably, in this embodiment, the third mounting surface 240 is perpendicular to the first mounting surface 230, and both are in an "L" shape. The third abutting surface 320 is perpendicular to or intersects the first abutting surface 310, preferably, the third abutting surface 320 is perpendicular to the first abutting surface 310, and the first abutting surface 310 and the third abutting surface 320 are also in an "L" arrangement. The first abutting surface 310 is abutted with the first mounting surface 230 along the second axis PP', and the third abutting surface 320 is abutted with the third mounting surface 240 along the direction perpendicular to or at an angle to the second axis, so that the front end assembly 200 receives the abutting force from the two mutually angled directions, and the stability of the front end assembly 200 is further improved.

Further, the surgical instrument further includes a third positioning structure including a third positioning portion and a third mating portion, where the third mating portion is disposed on the front end assembly 200, and the third positioning portion is disposed on the upper extension 302, and when the third mounting surface 240 is engaged with the third docking surface 320, the third positioning portion is cooperatively positioned with the third mating portion, so as to lock the front end assembly 200 at the proximal end, thereby preventing the front end assembly 200 from shaking at the proximal end, and further improving the stability of the front end assembly 200.

In this embodiment, as shown in fig. 8a, 9a and 12, the third positioning portion includes a slide slot 321 provided on the upper extension portion 302, and the third matching portion includes a slide block 241 provided on the front end assembly 200, where the positions of the two are interchangeable in other embodiments, and the embodiment is not limited specifically. The sliding block 241 slides along the second axis PP' in the sliding groove 321, and the front end assembly 200 is matched with the sliding groove 321 in the process of installing the front end assembly 300, that is, the sliding block 241 is at least partially accommodated in the sliding groove 321, so that the sliding block 241 slides along the sliding groove 321, and the installation direction of the front end assembly 200 is ensured to be stable. After the front end assembly 200 is mounted on the housing assembly 300, the sliding groove 321 still cooperates with the sliding groove 241, because the sliding groove 241 is disposed at a position corresponding to the bottom of the sliding groove 321 after the front end assembly 200 is mounted on the housing assembly 300, that is, the sliding groove 241 is disposed at the bottom of the sliding groove 321 and still cooperates with the sliding groove 321, so as to realize the cooperation positioning of the third positioning part and the third cooperation part, and the sliding groove 241 cooperates with the sliding groove 321 at the proximal end of the front end assembly 200, so that the proximal end of the front end assembly 200 is prevented from shaking, and the stability of the surgical instrument is further maintained.

The third butt joint surface 320 is provided with two groove wall plates 3210, a sliding groove 321 is formed between the two groove wall plates 3210, the groove wall plates 3210 comprise first wall plates 3211, the first wall plates 3211 are perpendicular to the third butt joint surface 320, and the two first wall plates 3211 are parallel, so that the sliding groove 321 is an open sliding groove. The front end assembly 200 has a groove 232 formed in the third mounting surface 240, the groove 232 is disposed corresponding to the first wall plate 3211, and the slider 241 is disposed in the groove 232. The grooves 232 are arranged to locate the slider 241 within the front end assembly 200 to ensure flatness of the third mounting surface 240. After the front end assembly 200 is mounted to the housing assembly 300, the slider 241 is positioned in the sliding groove 321 and between the two first wall plates 3211, and the two first wall plates 3211 block the slider 241 in the width direction Y to limit the proximal end of the front end assembly 200 in the width direction Y, so as to prevent the proximal end of the front end assembly 200 from shaking, and further maintain the stability of the surgical instrument.

In another embodiment, the channel wall plate 3210 further includes a second wall plate 3212, and the second wall plate 3212 is connected to a side of the first wall plate 3211 remote from the third abutting surface 320. The second wall plate 3212 is angled with respect to the first wall plate 3211, and the second wall plate 3212 serves to limit the front end assembly 200 in the length direction X. Preferably, the second wall plate 3212 in the present embodiment is perpendicular to the first wall plate 3211, and the second wall plate 3212 limits the sliding block 214 in the length direction X of the front end assembly 200, so as to limit the front end assembly 200 in the length direction X, thereby further improving the stability of the front end assembly 200.

In one embodiment, when the third abutting surface 320 is attached to the third mounting surface 240, the slider 241 is completely accommodated in the slide groove 321, and preferably, the length of the slider 241 in the sliding direction is equal to the length of the slide groove 321 in the sliding direction. The sliding directions of the sliding block 241 and the sliding groove 321 are parallel to the second axis PP ', and the lengths of the sliding block 241 and the sliding groove 321 in the direction of the second axis PP' are equal, so that after the front end assembly 200 is mounted to the housing assembly 300, the sliding block 241 is completely embedded into the sliding groove 321, the side wall of the sliding block 241 can be completely abutted against the inner wall of the sliding groove 321, and the stability of the cooperation positioning of the third positioning part and the third cooperation part is improved.

In a preferred embodiment, the front end assembly 200 includes a first mounting surface 230, a second mounting surface 250, and a third mounting surface 240, the second mounting surface 250 and the third mounting surface 240 being located on opposite sides of the first mounting surface 230, and being generally "Z" shaped. The housing assembly 300 includes a first mating surface 310, a second mating surface 360, and a third mating surface 320, where the second mating surface 360 and the third mating surface 320 are located on two sides of the first mating surface 310, and are generally "Z" -shaped. After the front end assembly 200 is mounted on the housing assembly 300, the first abutting surface 310 is abutted against the first mounting surface 230, the third abutting surface 320 is abutted against the third mounting surface 240, the second abutting surface 360 is abutted against the second mounting surface 250, the abutting directions of the first abutting surface 310 and the first mounting surface 230, the abutting directions of the third abutting surface 320 and the third mounting surface 240 and the abutting directions of the second abutting surface 360 and the second mounting surface 250 are different, the front end assembly 200 is limited by the abutting forces in the three directions, and the mounting stability of the front end assembly 200 and the housing assembly 300 is further improved.

Further, the surgical instrument in this embodiment further includes a second positioning structure and a third positioning structure for positioning the front end assembly 200 distally and proximally, respectively, to further ensure the stability of the installation of the front end assembly 200 with the housing assembly 300.

In another embodiment, as shown in fig. 10h, the housing assembly 300 is provided with two peripheral limiting portions 314, the two peripheral limiting portions 314 are respectively disposed at two sides of the housing assembly 300 in the width direction Y and are connected to the third abutting surface 320, and when the third abutting surface 320 is attached to the third mounting surface 240, two sides of the front end assembly 200 in the width direction are respectively attached to the two peripheral limiting portions 314. The circumferential limiting portion 314 is configured to limit the front end assembly 200 in the width direction Y, so as to prevent the front end assembly 200 from shaking in the width direction Y, thereby improving the stability of the surgical instrument. It should be noted that, the connection between the peripheral limiting portion 314 and the third abutting surface 320 forms an arc portion, and a corresponding arc portion is also formed on the front end assembly 200, so that during the process of mounting the front end assembly 200 to the housing assembly 300, the arc portion of the front end assembly 200 is matched with the arc portion of the housing assembly 300, thereby further ensuring the mounting stability and the position stability of the front end assembly 200 on the housing assembly 300.

As shown in fig. 14a, the coupling 350 includes, in its axial direction: the first part 351, the second part 352, the axle sleeve 353 connected to the first part 351 and the second part 352, the first part 351 is used for connecting the transmission shaft 220, the second part 352 is used for connecting the driving shaft 420, the first part 351 and the second part 352 are connected, the first part 351 and the second part 352 can synchronously rotate, and further transmission between the driving shaft 420 and the transmission shaft 220 is achieved. In this embodiment, as shown in fig. 14a to 15b, a guide inclined surface 3511 is disposed on a side of the first portion 351 facing away from the handle assembly 400, that is, on an upper side in fig. 15a, in a process of installing the front end assembly 200 to the housing assembly 300, the guide inclined surface 3511 is disposed on a side of the first portion 351 near the front end assembly 200, in a process of approaching the transmission shaft 220 to the first portion 351, the transmission shaft 220 abuts against the guide inclined surface 3511, and under the guide of the guide inclined surface 3511, the transmission shaft 220 and the first portion 351 of the coupling 350 relatively rotate to be aligned and connected, so as to realize the mating connection of the first portion 351 and the transmission shaft 220. Alignment refers to a state in which the drive shaft 220 is positioned opposite to the coupling 350, in which the drive shaft 220 can be inserted into the coupling 350 to be connected with the coupling 350, and in which the drive shaft 220 is rotated to be aligned with the coupling 350 during switching of the drive shaft 220 and the coupling 350 to the aligned state. The first portion 351 is provided with a plurality of abutting portions 3512, an abutting space 3513 is formed between two adjacent abutting portions 3512, specifically, the abutting portion 3512 is provided on an inner ring of the first portion 351, and the guiding inclined surface 3511 is provided on an end of the abutting portion 3512 away from the handle assembly 400. The transmission shaft 220 includes a plurality of mating parts 221, each mating part 221 includes a convex peak portion and curved surfaces located at two sides of the peak portion, the curved surfaces of adjacent mating parts 221 are smoothly connected, and the radial dimension of the curved surfaces is smaller than that of the peak portion. In the aligned state, the driving shaft 220 is pressed toward the first portion, the bottom surface of the peak is fitted with the guide slope 3511 and the bottom surface of the peak is guided by the guide slope 3511 to rotate the peak, and thus the driving shaft 220 is rotated, so that the driving shaft 220 is aligned with the first portion 351, that is, each of the mating parts 221 is aligned with each of the mating spaces 3513, and each of the mating parts 221 can be inserted into each of the mating spaces 3513. The coupling portion 221 is inserted into the docking space 3513 to connect the transmission shaft 220 with the first portion 351, so that the transmission shaft 220 can rotate synchronously with the first portion 351, and further synchronous rotation of the driving shaft 420, the second portion 352, the first portion 351 and the transmission shaft 220 is achieved. Meanwhile, the plugging of the plurality of docking spaces 3513 with the plurality of mating parts 221 also increases the connection strength of the driving shaft 220 with the first portion 351. The second portion 352 is connected to the drive shaft 420 in the same manner as the first portion 351 is connected to the drive shaft 220. Of course, in other embodiments, the first portion 351 and the transmission shaft 220, and the second portion 352 and the driving shaft 420 may be connected in other manners, which are not specifically limited in this embodiment.

Wherein, when the transmission shaft 220 rotates along the first rotation direction, the jaw 110 is closed; upon rotation in the second rotational direction, jaws 110 open. When the front end assembly 200 and the housing assembly 300 are mounted, if the jaws 100 are at the maximum open position, the drive shaft 220 is at the limit position in the second rotational direction and cannot continue to rotate. The driving shaft 220 rotates during the alignment with the coupling 350, the guiding inclined plane 3511 is configured such that the driving shaft 220 can only rotate along the first rotation direction during the alignment with the coupling 350, the guiding inclined plane 3511 has a high side and a low side, the low side is far away from the high side along the first rotation direction (arrow direction in the figure), and when the peak of the mating part 221 contacts with the guiding inclined plane 3511, the driving shaft 210 moves along the tilting direction of the guiding inclined plane 3511, so as to drive the driving shaft 210 to rotate along the first rotation direction. After the mating portions 3512 are disengaged from the guide inclined surfaces 3511, the driving shaft 210 is rotated to an aligned state, at which time the driving shaft 210 is aligned with the first portion 321 of the coupling 320, the peak portions of the mating portions 3512 are aligned with the respective docking spaces 3513, and the mating portions 3512 are movable in the axial direction of the driving shaft 210 to be inserted into the respective docking spaces 3513. Thus, the provision of the guide slope 3511 allows the drive shaft 220 to be aligned with the first portion 351 only in the first rotational direction, avoiding the drive shaft 210 from getting stuck with a tendency to move in the second rotational direction, and preventing installation from being performed.

When the front end assembly 200 is detached, the medical staff can press the buttons 511 on one side or both sides of the front end assembly 200 in the width direction Y at the same time, so that the locking piece 520 moves to the unlocking position and compresses the elastic piece 530, the locking piece 520 is separated from the clamping groove, the front end assembly 200 is in a state of being detached from the housing assembly 300, at the moment, the medical staff can pull the front end assembly 200 in a direction away from the housing assembly 300, and the front end assembly 200 slides relative to the housing assembly 300 through the cooperation of the sliding block 241 and the sliding groove 321 until the front end assembly 200 is separated from the housing assembly 300, so that the detachment is completed.

In the surgical instrument of the present embodiment, the front end assembly 200 is mounted on the housing assembly 300 along the second axis PP ', and the direction of the second axis PP' is parallel to the axial direction of the transmission shaft 220 of the front end assembly 200, so as to ensure that the transmission shaft 220 is matched with the coupling 350 along the axial direction, and the connection is more stable; after the front end assembly 200 is mounted to the housing assembly 300, the front end assembly 200 can be limited in the length direction and the width direction by the cooperation of the positioning piece and the matching piece so as to position the front end assembly 200, so that the front end assembly 200 is stably mounted on the housing assembly 300, and the overall stability of the surgical instrument is improved; the operation member 510 is provided at the side portion of the front end assembly 200 in the width direction Y, and when the front end assembly 200 is detached from the housing assembly 300, the medical staff can unlock the front end assembly 200 by pressing the button 511 at the side portion of the front end assembly 200, thereby improving the convenience of operation. The operating member 510 is operated in a first direction to move the locking member 520 from the locked position to the unlocked position, the first direction being parallel to the width direction Y, facilitating the operator's manipulation of the operating member 510 while holding the front end assembly.

Embodiment 2

A second embodiment of the present application relates to a surgical instrument, generally identical to the surgical instrument of the first embodiment, with the main differences being: as shown in fig. 7, 23 and 24, the operating member 510 in the present embodiment is rotatably disposed on the front end assembly 200, the housing assembly 300 is provided with an engaging portion 341, and the operating member 510 is switched between the first position and the second position by rotation, so that the locking member 520 is engaged with the engaging portion 341, thereby locking the front end assembly 200 and the housing assembly 300.

As shown in fig. 25, when the operating member 510 is located at the first position, the locking member 520 is located at the locking position and is engaged with the engaging portion 341; as shown in fig. 26, when the operating member 510 is located at the second position, the locking member 520 is located at the unlocking position and separated from the engaging portion 341. Specifically, as shown in fig. 24 to 26, the operation member 510 is a rotary pressing member 512 hinged to the front end assembly 200, the rotary pressing member 512 is connected to the front end assembly 200 through a pin 5123, the axis of the pin 5123 is parallel to the axis of the sleeve member 120, the rotary pressing member 512 is rotated about the pin 5123, and the pressing direction of the rotary pressing member 512 is perpendicular to the first axis OO', which is the width direction Y of the front end assembly 200. The rotary pressing member 512 has an upper portion 5121 and a lower portion 5122, wherein the upper portion 5121 is located on the upper side of the pin 5123 for the medical staff to operate and is a driving portion; the lower portion 5122, i.e., the locking member 520, is located below the pin 5123 and is a driven portion. When the upper portion 5121 of the rotary pressing member 512 is pressed, the lower portion 5122, i.e., the locking member 520 is rotated, and the locking member 520 is switched between the locking position and the unlocking position by the rotation. When the rotary pressing member 512 is located at the second position, the distance between the upper portion 5121 and the front end module 200 is smaller than the distance between the lower portion 5122 and the front end module 200, and the upper portion 5121 is preferably attached to the housing of the front end module 200, and the rotary pressing member 512 is pressed. When the rotary pressing member 512 is located at the first position, the distance between the upper portion 5121 and the front end assembly 200 is greater than the distance between the lower portion 5122 and the front end assembly 200, and the rotary pressing member 512 is in a released state. The rotational press 512 may be switched from the first position to the second position when the healthcare worker presses the upper portion 5121 of the rotational press 512. Wherein the operating member 510 is operated in a first direction, which is the width direction Y of the front end assembly 200, and the locking member 520 is moved in a second direction, which is an arc direction of rotation about the pin 5123, such that the first direction intersects the second direction.

The locking structure 500 further includes an elastic member 5124, wherein the elastic member 5124 is connected between the front end assembly 200 and the rotary pressing member 512, and the elastic member 5124 provides an elastic force to maintain the operation member 510 in the first position, i.e., the position of the upper portion 5121 away from the front end assembly 200. In one embodiment, the elastic member 5124 is a compression spring, one end of which is connected to the front end assembly 200 and the other end of which is connected to the upper portion 5121 of the rotary pressing piece 512, which pushes the upper portion 5121 outward in the width direction Y of the front end assembly 200, so that the rotary pressing piece 512 is maintained in the first position; in another embodiment, the elastic member 530 is a tension spring (not shown), one end of which is connected to the front end assembly 200 and the other end of which is connected to the lower portion 5122 of the rotary pressing member 512, and pulls the lower portion 5122 inward in the width direction Y of the front end assembly 200 to maintain the rotary pressing member 512 in the first position; in another embodiment, the resilient member 5124 may be a torsion spring disposed coaxially with the pin 5123 that provides a torsion force that maintains the rotational presser 512 in the first position. When the healthcare worker presses the upper portion 5121 of the rotational press 512, the rotational press 512 is switched from the first position to the second position, such that the front end assembly 200 is unlocked from the housing assembly 300; upon release of the rotary press 512, the rotary press 512 switches from the second position back to the first position, such that the front end assembly 200 is locked with the housing assembly 300.

In this embodiment, as shown in fig. 7 and 23 to 26, the upper housing 330 is fastened to the mating portion 341 of the lower housing 340 by the fastening portion 331, so as to lock the upper housing 330 and the lower housing 340, thereby completing the closing of the handle assembly 400. The width of the mating portion 341 is greater than that of the fastening portion 331, and after the fastening portion 331 is fastened to the mating portion 341, a portion of the mating portion 341 is still exposed to the outside for fastening with the locking member 520. The locking member 520 further includes a hook 524 connected to the lower portion 5122 of the rotary pressing member 512, wherein the hook 524 is engaged with the engaging portion 341 in the locked position and is separated from the engaging portion 341 in the unlocked position. When the rotary pressing member 512 is located at the first position, the lower portion 5122 thereof is close to the front end assembly 200, and the hook 524 is buckled with the mating portion 341, so that the front end assembly 200 is locked with the housing assembly 300; when the rotary pressing member 512 is located at the second position, the lower portion 5122 thereof is away from the front end assembly 200, and the hook 524 is separated from the mating portion 341, so that the front end assembly 200 is unlocked from the housing assembly 300.

In other embodiments, the upper and lower shells 330, 340 of the shell assembly 300 may also be matingly locked by other means, such as a hinged fit, etc. The engaging portion 341 may be provided on the upper housing 330, and in the present embodiment, only the engaging portion 341 is provided on the lower housing 340 is described as an example, and the present invention is not limited to this.

After the front end assembly 200 is mounted to the housing assembly 300, the front end assembly 200 can be limited in the length direction and the width direction by matching the positioning piece and the matching piece, so that the front end assembly 200 is positioned, the front end assembly 200 is stably mounted on the housing assembly 300, and the overall stability of the surgical instrument is improved; the operation members 510 are provided at both sides of the front end assembly 200 in the width direction Y, and the medical staff can unlock the front end assembly 200 by pressing the two-side rotation pressing members 512 when the front end assembly 200 is mounted and dismounted on the housing assembly 300, thereby improving the convenience of operation. The operating member 510 is operated in a first direction that is generally along the width direction Y of the front end assembly 200, facilitating the operator's manipulation of the operating member 510 when grasping the front end assembly 200.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A surgical instrument, comprising:

the front end assembly comprises a transmission shaft, and is of a strip shape;

the locking piece is arranged on the front end assembly and provided with a locking position and an unlocking position; in response to the engagement member engaging the positioning member, the locking member in a locked position connects the engagement member such that the front end assembly is locked with the housing assembly; the locking member in the unlocked position is disengaged from the mating member such that the front end assembly is unlocked from the housing assembly.

2. The surgical instrument of claim 1, wherein the proximal mating portion further comprises a second proximal mating portion that mates with the positioning member; the first proximal mating portion is located on the first side, the second proximal mating portion is located on the second side, or the first proximal mating portion is located on the second side, and the second proximal mating portion is located on the first side.

3. The surgical instrument of claim 1 or 2, wherein the distal mating portion further comprises a second distal mating portion that mates with the positioning member; the first distal mating portion is located on the first side, the second distal mating portion is located on the second side, or the second distal mating portion is located on the first side, and the first distal mating portion is located on the second side.

4. The surgical instrument of claim 1, wherein the proximal mating portion is a protrusion disposed on a proximal end of the housing assembly and the distal mating portion is a protrusion disposed on a distal end of the housing assembly; the positioning piece comprises a plurality of positioning grooves arranged on the front end assembly; after the first butt joint surface is attached to the first installation surface, the protrusion is inserted into the positioning groove to achieve the matching of the matching piece and the positioning piece.

5. The surgical instrument of claim 4, wherein the locking member comprises a carriage and a first locking portion provided to the carriage, the carriage being movable within the front end assembly to switch the locking member between the locked position and the unlocked position;

6. The surgical instrument of claim 1, wherein the front end assembly comprises a front end body and a lower extension connecting a distal end of the front end body, the front end assembly further comprising a second mounting surface disposed on the lower extension, the second mounting surface being connected to the first mounting surface and disposed at a first angle; the housing assembly further comprises a second abutting surface, wherein the second abutting surface is arranged at the far end of the first abutting surface and is arranged at a second angle with the first abutting surface; the first angle is equal to the second angle; after the front end assembly is mounted on the housing assembly, the first mounting surface is attached to the first butt joint surface, and the second mounting surface is attached to the second butt joint surface.

7. The surgical instrument of claim 6, further comprising:

8. The surgical instrument of claim 7, wherein the second mating member includes a receiving slot disposed in the lower extension and extending through the second mounting surface, and wherein the second positioning member includes a projection disposed in the second mating surface, the projection being configured to engage the receiving slot to cooperatively position the second positioning member with the second mating member when the second mounting surface is mated with the second mating surface.

9. The surgical instrument of any one of claims 1 to 8, wherein the housing assembly comprises a housing body and an upper extension connecting a proximal end of the housing body, the housing assembly further comprising a third abutment surface provided on the upper extension, the third abutment surface being at a third angle to the first abutment surface; the front end assembly further comprises a third mounting surface, wherein the third mounting surface is arranged at the proximal end of the first mounting surface and forms a fourth angle with the first mounting surface, and the third angle is equal to the fourth angle; after the front end assembly is mounted on the housing assembly, the first mounting surface is attached to the first butt joint surface, and the third mounting surface is attached to the third butt joint surface.

10. The surgical instrument of claim 9, further comprising:

11. The surgical instrument of claim 10, wherein the third positioning portion comprises a chute and the third mating portion comprises a slider; the sliding block slides in the sliding groove to guide the front end assembly to be mounted to the housing assembly during the process of mounting the front end assembly to the housing assembly; after the front end assembly is mounted on the housing assembly, the sliding block is accommodated in the sliding groove, so that the third positioning part is matched and positioned at the third matching part.

12. The surgical instrument of claim 11, wherein two of the flutes are provided on the third interface, the two flutes forming the runner in the width direction, the flutes comprising: the first wallboard is connected to the third butt joint surface, and the second wallboard is connected to one end, far away from the third butt joint surface, of the first wallboard; the front end component is provided with a groove on the third mounting surface, and the sliding block is arranged in the groove; when the sliding block is accommodated in the sliding groove, the first wall plate limits the sliding block in the width direction so as to limit the front end assembly in the width direction; the second wall plate limits the sliding block in the length direction so as to limit the front end assembly in the length direction.

13. The surgical instrument of claim 9, wherein the housing assembly is provided with: the two peripheral limiting parts are respectively arranged at two sides of the width direction of the housing assembly, the peripheral limiting parts extend upwards to be connected with the third butt joint surface, and when the third butt joint surface is attached to the third mounting surface, two sides of the width direction of the front end assembly are respectively attached to the two peripheral limiting parts.