CN118356234A

CN118356234A - Surgical instrument

Info

Publication number: CN118356234A
Application number: CN202311835599.6A
Authority: CN
Inventors: 柴海波; 薛紫维; 邹欢
Original assignee: Wuhan Mindray Biomedical Technology Co ltd; Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Wuhan Mindray Biomedical Technology Co ltd; Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2023-01-12
Filing date: 2023-12-27
Publication date: 2024-07-19
Also published as: CN222265344U

Abstract

The invention discloses a surgical instrument, which comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the handle assembly comprises a main body and a grip, two first concave parts are formed on the first side and the second side of the handle assembly which are symmetrical based on a symmetry plane in a transitional connection mode, a second concave part and a third concave part are formed on the main body and the grip in a transitional connection mode, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the symmetry plane; on a projection plane perpendicular to the symmetry plane and parallel to the central axis, a first projection area of the main body corresponding to the first concave part on the projection plane completely falls into a second projection area of the handle corresponding to the first concave part on the projection plane. So that the first concave part can support the fingers of a user to play a supporting role on the fingers, accords with ergonomics and improves the operation comfort level of the user.

Description

Surgical instrument

Technical Field

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

Background

At present, minimally invasive surgery occupies an important place in surgery, and surgical instruments are commonly used in minimally invasive surgery. In surgical and clinical procedures, surgeons are required to perform critical distraction procedures on surgical instruments for fine dissection and assistance. However, in the present situation, the jaw-type instrument is often used to perform the above-mentioned operations, and although the jaw-type instrument is flexible for a doctor to operate, the jaw-type instrument may cause strain problems due to fatigue and compression of hands for a long time.

The gun-type instrument can alleviate the strain problem, but doctors are hard and unsmooth in operation, and the hand posture is required to be changed and swung, so that the problems of fatigue and instability are also brought.

Disclosure of Invention

In view of this, the present invention proposes a surgical instrument.

A first aspect of the present invention proposes a surgical instrument comprising: the gun comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the actuator assembly is connected with the handle assembly through the gun barrel assembly; the handle assembly comprises a main body and a grip, wherein the main body and the grip are in transitional connection with each other on a first side and a second side which are symmetrical based on a symmetrical plane, so that the first concave part can be used for accommodating fingers of a user when the user holds the surgical instrument; the main body and the handle are also in transitional connection to form a second concave part and a third concave part, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the plane of symmetry;

And on a projection plane perpendicular to the symmetry plane and parallel to the central axis, a first projection area of the main body corresponding to the first concave part on the projection plane completely falls into a second projection area of the handle corresponding to the first concave part on the projection plane.

A second aspect of the present invention proposes a surgical instrument comprising: the gun comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the actuator assembly is connected with the handle assembly through the gun barrel assembly; the handle assembly comprises a main body and a grip, wherein the main body and the grip are in transitional connection with each other on a first side and a second side which are symmetrical based on a symmetrical plane, so that the first concave part can be used for accommodating fingers of a user when the user holds the surgical instrument; the main body is in transitional connection with the grip, a second concave part and a third concave part are further formed, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the plane of symmetry;

on a continuous section perpendicular to the central axis of the barrel assembly, when the section is positioned in the area corresponding to the first concave part, a convex point with the largest distance from the symmetrical plane is positioned on the section line corresponding to the handle assembly and positioned at the transition joint of the handle towards the first concave part.

A third aspect of the present invention provides a surgical instrument comprising: the gun comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the actuator assembly is connected with the handle assembly through the gun barrel assembly; the handle assembly comprises a main body and a grip, wherein the main body and the grip are in transitional connection with each other on a first side and a second side which are symmetrical based on a symmetrical plane, so that the first concave part can be used for accommodating fingers of a user when the user holds the surgical instrument; the main body is in transitional connection with the grip, a second concave part and a third concave part are further formed, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the plane of symmetry;

the first recess further includes a first edge proximate the grip and a second edge proximate the body, the first recess being formed between the first edge and the second edge, the first edge being further from the plane of symmetry than the second edge.

A fourth aspect of the invention provides a surgical instrument comprising:

a handle assembly comprising a handle for gripping and a trigger movable relative to the handle;

An actuator assembly comprising a first binding clip and a second binding clip, the first binding clip and the second binding clip being relatively pivotable to effect opening or closing of the actuator assembly, at least one of the first binding clip and the second binding clip being configured to treat biological tissue;

the gun barrel assembly comprises a pull rod and a clamp pipe sleeved outside the pull rod, and is used for connecting the actuator assembly and the handle, when the trigger moves relative to the handle, the pull rod axially moves under the drive of the trigger, and the actuator assembly moves under the action of the pull rod in a motion matching relation with the trigger, so that the first clamp head and the second clamp head relatively pivot;

The handle is provided with a first side and a second side which are arranged basically symmetrically relative to a symmetry plane, and the central axis of the pull rod is positioned on the symmetry plane;

wherein, a first bearing structure is formed on the first side, and the first bearing structure is used for forming a supporting force with the direction opposite to the acting force applied on the first bearing structure when the trigger moves relative to the handle so as to bear an object abutted on the first bearing structure;

the first support structure has a first edge proximate the trigger that is farther from the plane of symmetry than at other locations.

A fifth aspect of the present invention proposes a surgical instrument comprising:

the side of the handle, which is opposite to the actuator assembly, is concavely arranged towards the inner side of the handle to form a second concave part which is used for being attached to the tiger mouth of a user, the second concave part is provided with a contact surface which is used for being attached to the tiger mouth of the user, and at least one tangent line of the contact surface on a section line on the symmetrical surface is parallel to the central shaft so as to be propped against the corresponding position of the tiger mouth of the user when the user holds the handle.

According to the technical scheme, the surgical instrument provided by the invention can support the fingers of a user through the arrangement of the first concave part, so that the finger support device has a supporting effect, accords with ergonomics, improves the operation comfort of the user, maintains the hand stability, is convenient for the user to perform terminal operation on human tissues, and avoids the problems of fatigue, instability and the like during operation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained by those skilled in the art without the inventive effort.

Fig. 1 is a schematic view of a first view of a surgical instrument according to an embodiment of the present invention.

Fig. 2 is a schematic view of a second perspective structure of a surgical instrument according to an embodiment of the present invention.

Fig. 3 is a schematic view of a third perspective structure of a surgical instrument according to an embodiment of the present invention.

Fig. 4 is a schematic view of a handle assembly according to an embodiment of the present invention.

Fig. 5 is an enlarged partial schematic view of the structure shown in fig. 4.

Fig. 6 is a schematic cross-sectional view of a surgical instrument according to an embodiment of the present invention.

Fig. 7 is a schematic view of a user performing a distraction operation on a surgical instrument.

Fig. 8 is a schematic view of a modification of the surgical instrument according to the embodiment of the present invention.

In the figure: 100. a surgical instrument; 10. a handle assembly; 11. a handle; 11a, a main body; 11b, a grip; 111. a first side; 112. a second side; 113. a mounting groove; 114. a bottom surface; 115. convex hulls; 12. a trigger; 121. an operation unit; 1211. an inner bore; 122. an avoidance surface; 13. a rotating shaft; 14. a transmission member; 20. a barrel assembly; 21. a central shaft; 30. an actuator assembly; 31. a first binding clip; 32. a second binding clip; 40. a first concave portion; 40a, a first support structure; 40b, a second support structure; 41. a first edge; 411. a first sub-edge; 412. a second sub-edge; 42. a second edge; 43. an anti-slip structure; 50. a second concave portion; 51. a contact surface; 60. a third recess; 60a, an index finger supporting structure; 61. an extension; 70. operating the key; 71. a bump structure; A-A, symmetry plane; B-B, a first projection area; C-C, a second projection area.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments 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 also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Referring now to fig. 1-4, the present application provides a surgical instrument 100, wherein the surgical instrument 100 is an instrument that is configured to perform an associated surgical procedure, such as performing a grasping, cutting, coagulating, separating, or stapling end operation, by insertion into a patient. The surgical instrument 100 may be, for example, a smart bipolar, ultrasonic surgical blade, electric knife, stapler, or the like.

Surgical instrument 100 generally includes a handle assembly 10, a barrel assembly 20, and an actuator assembly 30, with barrel assembly 20 including a drive train coupled to actuator assembly 30, and handle assembly 10 including a handle 11 and a trigger 12 movably coupled to handle 11.

In operating surgical instrument 100, an operator may grasp handle 11 and extend implement assembly 30 through elongate barrel assembly 20 and into a focal site within a human body. The trigger 12 is operated to perform the opening operation or the retracting operation so as to trigger the excitation transmission chain or the closing transmission chain, so that the actuator assembly 30 performs the operations of cutting, coagulating, separating or suturing the human tissues.

In an alternative embodiment, the handle 11 is used for holding by a user, the trigger 12 has an operation portion 121 for supporting the finger of the user, the operation portion 121 is in a closed loop state, and has an inner hole 1211 into which the finger extends, and the front inner wall and the rear inner wall of the inner hole 1211 may be provided with radian structures attached to the finger, so that the finger of the user can support when the user performs the opening operation or the retracting operation, and the user controls the operation portion 121 to perform the opening operation or the retracting operation by operating the finger, so as to control the opening or the closing of the actuator assembly 30.

Specifically, the actuator assembly 30 includes a first jaw 31 and a second jaw 32, the first jaw 31 and the second jaw 32 being relatively pivotable to effect opening or closing of the actuator assembly 30, at least one of the first jaw 31 and the second jaw 32 being configured to treat biological tissue. Illustratively, the treatment of the biological tissue may be a treatment of applying energy from a surgical energy host to the biological tissue, such as cutting by ultrasonic vibration or coagulation by bipolar or single stage electrocoagulation, or the like, or a treatment of applying no energy to the biological tissue, such as suturing by a stapler, or the like.

The barrel assembly 20 includes a pull rod and a clamp tube sleeved outside the pull rod for connecting the actuator assembly 30 and the handle 11. When the trigger 12 is moved relative to the handle 11, the pull rod is moved axially by the actuation of the trigger 12 and the actuator assembly 30 is moved by the pull rod in moving engagement with the trigger 12 to cause the first and second jaws 31, 32 to pivot relative to each other.

As shown in fig. 3 and 4, the handle 11 has a first side 111 and a second side 112 arranged substantially symmetrically with respect to a plane of symmetry A-A on which the central axis 21 of the pull rod is located.

In an alternative embodiment, as shown in FIG. 3, a first support structure 40a is formed on the first side 111, the first support structure 40a being configured to provide a supporting force in a direction opposite to a force applied to the first support structure 40a when the trigger 12 is moved relative to the handle 11, so as to support a subject abutting the first support structure 40 a. The first support structure 40a has a first edge 41 adjacent the trigger 12, the first edge 41 being further from the plane of symmetry A-A than elsewhere. In particular applications, other locations refer to any other location on the outer surface of the handle 11 than the first support structure 40a, i.e., the location of the first edge 41 is more convex than other locations on the outer surface of the handle 11. The first supporting structure 40a is arranged close to the first edge 41 of the trigger 12 and is of a convex structure, so that the thumb of a user can be conveniently supported, a reaction force is generated when the thumb is pressed, stress support is provided, the user can conveniently execute tail end operation on human tissues, and the problems of fatigue, instability and the like during operation are avoided.

For ease of illustration, taking the surgical instrument 100 illustrated in fig. 1-4 as an example, the first side 111 may be the left side of the handle 11 in fig. 3, the second side 112 may be the right side of the handle 11 in fig. 3, the side of the handle 11 facing the actuator assembly 30 may be the front side, and the side of the handle 11 facing away from the actuator assembly 30 may be the rear side.

The surgical instrument 100 according to the embodiment of the present application can support the thumb through the arrangement of the first bearing structure 40a, so that the thumb joint of the user can be supported in a natural bending state (as shown in fig. 7) when the user holds the handle 11, so as to provide a stressed support when the user performs a stretching operation or a retracting operation, conform to ergonomics, and promote the comfort of the user, especially when the user performs the stretching operation, because the middle finger, the ring finger, etc. stretching into the operation portion 121 need to be stretched forward, the thumb applies a force (as shown in fig. 7) towards the rear side along the axial direction of the forceps tube at this time so as to stretch the trigger 12 towards the fingers stretching into the operation portion 121, and a reaction force opposite to the direction of the force applied by the thumb of the user, that is, a reaction force of the backward force can be generated in the first direction so as to maintain the hand stability, thereby facilitating the user to perform the tip operation on the human tissue, and avoiding the problems of fatigue, instability, etc. during the operation.

In some usage scenarios, the spreading operation needs to be slow and stable, if the first supporting structure 40a is not provided, a better auxiliary supporting and stable supporting can not be provided for the spreading operation of the trigger 12 by the doctor, which can cause the difficulty in operating the doctor and the swing of changing the hand posture, such as that the thumb can slip without the force points to affect the spreading effect and the hand stability, fatigue and instability problems can be caused, and the shaking of the actuator assembly 30, such as the shaking of the cutter head, can be caused, which is a big pain point in the operation. And the curvature of the hand motion affects the physician's hand organoleptic and visual linkage with the actuator assembly 30, raising the risk during surgery.

The surgical instrument 100 according to the embodiment of the present application supports the thumb through the arrangement of the first supporting structure 40a, so that the thumb is in a natural bending state, and can provide a reaction force of a backward acting force to maintain stability, thereby helping a doctor to operate in an efficient, flexible and non-burdened manner, and avoiding the problem of permanent occupational strain to a great extent compared with the conventional clamp type instrument, effectively improving the stability and reliability of the operation of the expanding trigger 12 in the operation, avoiding the accidental injury and risk in the operation, and bringing great operational confidence to the doctor and the health care of the patient.

In an alternative embodiment, as shown in fig. 3, the first support structure 40a further includes a second edge 42, and the handle 11 forms a first recess 40 between the first edge 41 and the second edge 42, the first recess 40 being a continuous curved surface, and in a continuous section perpendicular to the axial direction of the barrel assembly 20, the distance a from the first edge 41 to the plane of symmetry A-A being greater than the distance b from the second edge 42 to the plane of symmetry A-A in the current section. Through above-mentioned setting to make first depressed part 40 can laminate the thumb radian, not only can play better supplementary bearing and steady support to user's thumb, first depressed part 40 is continuous curved surface moreover, and the lines are smooth, and the appearance is coordinated pleasing to the eye, promotes user's use experience. Simultaneously make first edge 41 compare more protruding than first edge 41 to can the bearing user's thumb, with play the supporting role to the thumb, accord with ergonomic, promote user's operation comfort level.

In an alternative embodiment, as shown in fig. 3, the second side 112 is formed with a second supporting structure 40b, and the first supporting structure 40a and the second supporting structure 40b are symmetrically disposed with respect to the symmetry plane A-A, that is, the first concave portion 40 is disposed on both the first side 111 and the second side 112 of the handle 11, and since the handle 11 is integrally formed with a symmetrical structure, not only the appearance is more coordinated and beautiful, but also users with different handedness, that is, users with left hand or right hand, can normally use the surgical instrument 100.

In an alternative embodiment, as shown in figures 1-4, the surfaces of the first support structure 40a and the second support structure 40b are each provided with a non-slip structure 43 for contact with the thumb of the user. Illustratively, the anti-slip structure 43 may be a plurality of protrusions or other anti-slip means for increasing friction, which may act as anti-slip means to promote a force-bearing effect on the thumb of the user.

In some embodiments, as shown in FIGS. 1-3, the entire handle assembly 10 is arranged substantially symmetrically with respect to the plane of symmetry A-A, upon which the actuator assembly 30 is coupled to the handle assembly 10 by the barrel assembly 20; the handle 11 includes a main body 11a and a grip 11b, the main body 11a being located at an upper side of the grip 11b in a height direction of the handle 11, and two first recesses 40 being formed at a first side 111 and a second side 112 of the handle assembly 10 symmetrical based on a symmetry plane A-A, the main body 11a and the grip 11b being transitionally connected such that the first recesses 40 can be used to accommodate fingers of a user when the user holds the surgical instrument 100; the main body 11a and the grip 11b are also in transitional connection to form a second concave part 50 and a third concave part 60, the second concave part 50 is far away from the actuator assembly 30, and the third concave part 60 is close to the actuator assembly 30 along the axial direction of the gun barrel assembly 20; wherein the central axis 21 of barrel assembly 20 is located on a plane of symmetry A-A. In a specific operation, as shown in fig. 7, when the user holds the handle 11, the second concave portion 50 may be used to fit the user's tiger mouth, the first concave portion 40 may be used to fit the user's thumb, and the third concave portion 60 may be used to fit the user's index finger, so as to conform to the ergonomics and improve the comfort level of the user's operation.

In an alternative embodiment, as shown in fig. 6, on a projection plane perpendicular to the symmetry plane A-A and parallel to the central axis 21 of the barrel assembly 20, that is, a projection plane perpendicular to the height direction of the handle 11, the first projection area B-B of the main body 11a corresponding to the first recess 40 on the projection plane completely falls into the second projection area C-C of the grip 11B corresponding to the first recess 40 on the projection plane. That is, the first projection area B-B may be less than or equal to the area of the second projection area C-C. Therefore, the position of the handle 11, which is close to the grip 11b, of the first concave portion 40 is the most convex position of the outer surface of the whole handle 11, so that the fingers of a user can be supported, the finger support device has a supporting function, and the ergonomics are met, and the operation comfort of the user is improved.

In an alternative embodiment, the area of the first projection area B-B is smaller than the area of the second projection area C-C; and the first projection area B-B and/or the second projection area C-C are axisymmetric patterns. In a preferred embodiment, the surface of the first recess 40 may be provided with a non-slip structure 43 to enhance the force supporting effect on the thumb of the user. The anti-slip structure 43 is fully distributed on the surface of the first concave portion 40 so as to determine the range of the first concave portion 40 on the projection surface through the area provided with the anti-slip structure 43 in fig. 6, so that it can be seen that the area of the first projection area B-B is smaller than the area of the second projection area C-C, so that the position of the first concave portion 40 close to the grip 11B can be in a convex trend, so as to support the thumb of a user, support the thumb, conform to ergonomics, promote the comfort of operation of the user, maintain the hand stability, facilitate the user to perform terminal operation on human tissues, and avoid the problems of fatigue, instability and the like during operation.

The first projection area B-B and the second projection area C-C may be symmetrical with respect to the projection line of the central axis 21 of the barrel assembly 20 on the projection surface, so that the appearance of the handle 11 is more beautiful, and the surgical instrument 100 may be used by a user who is using left hand or right hand.

In an alternative embodiment, the above-described first projection area B-B and second projection area C-C are portions of the aforementioned main body 11a or grip 11B falling within a D-D area on the projection surface as shown in fig. 6, the portions within the D-D area corresponding to the extent of the first concave portion 40. The first projection area is preferably a projection of the body 11a in the D-D area, and the second projection area is preferably a projection of the grip 11b in the D-D area.

In an alternative embodiment, as shown in fig. 3 and 4, in a continuous section perpendicular to the central axis 21 of the barrel assembly 20, the protrusion having the greatest distance from the plane of symmetry A-A is located at the transition junction of the grip 11b toward the first recess 40, along the corresponding section line of the handle assembly 10 when the section is located in the corresponding region of the first recess 40. That is, on any section perpendicular to the central axis 21 of the barrel assembly 20, the convex point with the greatest distance from the symmetry plane A-A, that is, the most convex point is located at the edge where the first concave portion 40 is connected with the grip 11b, so that the lower edge of the first concave portion 40 connected with the grip 11b is integrally convex, and thus the whole thumb of the user can be supported, so as to fit and support the thumb of the user, conform to ergonomics, improve the operation comfort of the user, maintain the hand stability, facilitate the user to perform terminal operation on human tissues, and avoid the problems of fatigue, instability and the like during operation.

In an alternative embodiment, as shown in FIG. 3, the first recess 40 further includes a first edge 41 proximate the grip 11b and a second edge 42 proximate the body 11a, the first recess 40 being formed between the first edge 41 and the second edge 42, the first edge 41 being further from the plane of symmetry A-A than the second edge 42. That is, the maximum distance a between the first edge 41 and the symmetry plane A-A is greater than the maximum distance b between the second edge 42 and the symmetry plane A-A, and the arrangement mode is that the first edge 41 is arranged in a convex manner, so that the contact area with the thumb can be increased, the thumb can be supported better, enough stressed support is provided, a better auxiliary bearing and stable support are provided for the spreading operation of the trigger 12 by a user, the user can perform the tail end operation on the human body tissue conveniently, and the problems of fatigue, instability and the like during the operation are avoided.

In an alternative embodiment, as shown in fig. 4, a side of the handle 11 away from the actuator assembly 30 is further provided with a second recess 50 recessed toward the inside of the handle 11, the second recess 50 being adapted to engage with a user's tiger mouth; the first edge 41 includes a first sub-edge 411 and a second sub-edge 412, the second sub-edge 412 extending obliquely from an end near the second recess 50 toward the trigger 12 to the first sub-edge 411 to form a continuous curved surface extending from the second recess 50 toward the trigger 12 in cooperation with the outer surface of the handle 11. In this embodiment, the second sub-edge 412 can be disposed obliquely downward, and the second sub-edge 412 is located higher toward one end of the rear side, and gradually inclines downward toward the other end, so that when the user holds the handle 11 and places the thumb in the first recess 40, the user can better fit the thumb, and the thumb joint of the user can be supported, so that the thumb is in a natural bending state to be convenient for providing a stressed support, and when the user performs a stretching operation, the user can abut against the thumb to provide a reaction force of a backward acting force to maintain stability. When a user holds the handle 11, the thumb joint, the thumb side and the finger abdomen can be attached to the whole first concave part 40 naturally, so that the contact area between the first concave part 40 and the thumb is increased, the stress surface is increased, the stability is improved, the ergonomics are met, and the operation comfort level of the user is improved.

Illustratively, as shown in fig. 4, the first sub-edge 411 extends obliquely from one end close to the second sub-edge 412 toward the direction away from the trigger 12 to the other end, that is, the first sub-edge 411 extends obliquely upward from the rear side toward the front side, and the second sub-edge 412 has an oblique width larger than that of the first sub-edge 411 to conform to the natural state of thumb bending, and the first sub-edge 411 has a smaller oblique width to conform to the thumb while avoiding pressing to other fingers.

In an alternative embodiment, the first sub-edge 411 extends to the front side of the handle 11. In this embodiment, the first sub-edge 411 is folded to extend to the front side of the handle 11. In this embodiment, the front end of the first sub-edge 411 is folded and arranged to be able to fit the end of the thumb, so as to wrap the whole thumb of the user, promote the contact area with the thumb, promote the stress supporting effect, and prolong the length of the first concave portion 40 in the axial direction, so that the longer user of the thumb can also fit the first concave portion 40 completely, promote the contact area and the stress supporting effect, and provide comfortable holding experience for the user.

In an alternative embodiment, as shown in fig. 4 and 5, the handle assembly 10 further includes an operating button 70, the operating button 70 being used to activate the surgical instrument 100 to control the actuator assembly 30 to treat biological tissue; the handle 11 is further provided with an index finger supporting structure 60a adjacent to the operation key 70, the index finger supporting structure 60a is formed with a third concave portion 60, and the third concave portion 60 is concavely arranged towards the inner direction of the handle 11 and is used for supporting the fingers of a user. The side wall of the third recess 60 near the operation key 70 extends to form an extension portion 61, and the outer edge of the extension portion 61 facing the actuator assembly 30 is at least substantially flush with the outer edge of the operation key 70 facing the actuator assembly 30, so as to prevent the object located in the third recess 60, that is, the finger of the user from sliding out of the edge to touch the operation key 70. In the present embodiment, the outer edge of the extending portion 61 facing the actuator assembly 30 is at least substantially flush with the outer edge of the operating key 70 facing the actuator assembly 30, so that not only can the operating key 70 be activated by the user, but also the index finger of the user can return to the third recess 60 and be supported on the extending portion 61 when the operating key 70 is not required to be activated, and the overall structure is more coordinated and beautiful in appearance.

For example, if the index finger supporting structure 60a is not provided, the user can easily touch the operation key 70 by mistake in the use process, in order to avoid touching the operation key 70 by mistake, the user usually hangs the index finger in the air, and only moves the finger to press the operation key 70 when the operation key 70 is triggered, and fatigue is easily generated after a long time, therefore, in the embodiment, the index finger supporting structure 60a is provided to support the index finger of the user, and the operation key 70 is provided below the index finger supporting structure 60a, so that the error touching of the operation key 70 can be avoided, and meanwhile the index finger supporting is provided, so that the holding experience of the user is improved.

In an alternative embodiment, as shown in fig. 5, the operation key 70 may be provided with a protrusion structure 71, where the protrusion structure 71 is used for the index finger of the user to touch, so as to prompt that the index finger of the user has moved to the operation key 70. In this embodiment, when the operation key 70 needs to be activated, the index finger of the user can move down to the operation key 70, and then touch the protruding structure 71 to play a role in prompting and positioning, so that the user can accurately press the operation key 70. In addition, the protruding structure 71 is not only convenient for the operator to press, but also can increase friction to play a role in skid resistance, so that the index finger can better apply acting force on the operation key 70.

In an alternative embodiment, on a section parallel to the axial direction of the barrel assembly 20 and perpendicular to the symmetry plane A-A, the section line of the handle assembly 10 at the second recess 50 is firstly contracted towards the inside of the handle assembly 10 to fit the tiger mouth of the user, then expanded towards the outside of the handle assembly 10, and the geometric shape of the section line of the handle assembly 10 at the second recess 50 is continuously changed, so that the surface of the second recess 50 is smooth and curved to fit the radian of the hand, at this time, the width between the thumb and the index finger of the user from the tiger mouth to the thumb joint is gradually increased in a natural state when the user holds the second recess of the handle 11, so that the contact area between the hand and the handle 11 is increased to maintain stability, ergonomics are met, gaps are avoided from being insufficiently fit, and the holding experience of the user is improved.

In an alternative embodiment, as shown in FIG. 4, at least one tangent line to the cross-sectional line of second recess 50 is parallel to central axis 21 of barrel assembly 20 in the cross-sectional view of plane of symmetry A-A. Specifically, the second concave portion 50 has a contact surface 51 for fitting with the user's tiger's mouth; wherein, the contact surface 51 is on the cross section line of the cross section of the symmetry plane A-A, and at least one tangential line is parallel to the central axis 21 of the gun barrel assembly 20, so as to press against the corresponding position of the user's tiger mouth when the user holds the handle 11. Because the user can drive the handle 11 to swing continuously due to the change of hand gestures in the process of operating the apparatus, the soft tissue part at the concave part of the user's tiger mouth can be directly pressed by the arrangement of the contact surface 51 at the moment, so that the contact area with the hand of the user is increased, the relative position of the handle 11 and the hand of the user is more stable, the relative position of the handle 11 and the hand of the user cannot be easily changed, and the shake of the actuator assembly 30 is avoided.

In an alternative embodiment, the second recess 50 is disposed between the body 11a and the grip 11b, the grip 11b being disposed in cooperation with the trigger 12; the contact surface 51 is at least partially formed on the main body 11 a; in a continuous section perpendicular to the central axis 21 of the barrel assembly 20, the section line formed by the portion of the contact surface 51 formed on the body 11a tapers away from the actuator assembly 30. The contact surface 51 has a tapering tendency in a direction away from the actuator assembly 30. So that one end of the main body 11a far away from the actuator assembly 30 is in a rounded triangle structure with gradually reduced diameter, thereby not only being capable of adapting to the shape of the tiger mouth of a user and conveniently propping against the soft tissue part of the tiger mouth of the user, avoiding pressing the hard joints of the root parts of the thumb and the index finger during operation, improving the stability of the holding handle 11, but also being capable of reducing the volume of the handle 11, thereby reducing the weight of the instrument and being beneficial to miniaturization of the instrument.

Meanwhile, the section line geometry of the contact surface 51 is continuously changed, and the contact surface 51 has geometric continuity not smaller than the first order, so that the surface of the part of the main body 11a, on which the contact surface 51 is arranged, is smooth, the contact surface can be conveniently attached to the hands of a user, and the operation comfort of the user is improved.

In an alternative embodiment, the geometry of the second concave portion 50 is continuously changed, so that the surface of the second concave portion 50 is a smooth curve, the lines are smooth, the appearance is coordinated and attractive, the second concave portion 50 is more fit with the radian of the hand, the ergonomics are met, and the operation comfort of a user is improved.

In an alternative embodiment, the first sub-edge 411 is configured to transition to the second sub-edge 412 in the form of a curve having a geometric continuity of not less than a first order, and the first sub-edge 411 and the second sub-edge 412 are each a curve having a geometric continuity of not less than a first order. So that the edge of the first concave portion 40 is a smooth curve to conform to the radian of the hand, which is ergonomic and improves the comfort level of the user.

In an alternative embodiment, as shown in fig. 4 and 5, the minimum distance between the first edge 41 and the trigger 12 is less than the minimum distance between the extension 61 and the trigger 12. That is, in the state shown in fig. 4 and 7, the position of the first edge 41 is lower than the position of the extending portion 61, so that when the user needs to press the operation key 70, the index finger can naturally press the operation key 70 in the front-rear direction, and the index finger is parallel to the extending direction of the gun barrel assembly 20, thereby facilitating the operation and conforming to the ergonomics. If the position of the extension 61 is lower than the first edge 41, the index finger needs to be bent downward when the operation key 70 is pressed, and the index finger is pressed, so that the operation key 70 cannot be pressed naturally. The position of the trigger 12 is lower than the position of the first edge 41, so that the first concave portion 40 can not press the wrench under the condition that the first concave portion meets the supporting function, and meanwhile, the index finger can naturally press the operation key 70, and other fingers can swing flexibly in the trigger 12, so that the trigger meets the ergonomics.

In an alternative embodiment, the first edge 41 is positioned lower than the position where the second recess 50 engages the user's jaw. When the user holds the handle 11, the handle 11 is in the state shown in fig. 4 and 7, and the user holds the handle 11 with the thumb at a position higher than the position where the thumb is attached to the first edge 41, so that the thumb can be supported by the first concave portion 40 in a natural bending state. Is convenient to operate and accords with human engineering.

In an alternative embodiment, as shown in fig. 5, the maximum recess depth L1 of the third recess 60 in the axial direction is 6mm to 10mm. In consideration of the common use of male and female users, in order to allow enough space for placement of fingers, the maximum recess depth L1 of the third recess 60 in the axial direction is set in the range of 6mm to 10mm, so that fingers of different sizes can be supported.

Illustratively, the maximum recess depth L1 of third recess 60 may be anywhere between 6mm and 10mm along the axis of barrel assembly 20. For example, 6mm, 7mm, 8mm, 9mm, or 10mm, etc., the third recess 60 for placing the finger may have too small recess depth to affect the comfort of the user, and thus is limited in the above range, so that the finger of the user can be better supported, and force can be applied to the region when pulling or grasping the biological tissue occurs during the operation, and the operation key 70 is not erroneously touched.

In an alternative embodiment, as shown in FIG. 4, the angle R1 between the tangent to the extension 61 at each point along the cross-sectional line and the axial direction of the barrel assembly 20 is between 20 degrees and 40 degrees in the cross-sectional view of the plane of symmetry A-A. In a specific application, when the included angle R1 between the tangent line somewhere on the section line of the extension portion 61 and the axial direction of the barrel assembly 20 is smaller than 20 degrees, the user has a feeling of rubbing his or her hands when abutting against the extension portion 61, which affects the comfort of the user, i.e. 20 degrees is between the critical points of comfort and rubbing his or her hands. When the angle between the tangent line somewhere on the section line of the extension portion 61 and the axial direction of the barrel assembly 20 is greater than 40 degrees, the index finger of the user easily slips off the extension portion 61, so that the angle between the tangent line everywhere on the section line of the extension portion 61 and the axial direction of the barrel assembly 20 is set between 20 degrees and 40 degrees, and the problems of slipping off and hand rubbing are avoided.

In alternative embodiments, the tangent to the extension 61 at each point along the cross-sectional line may be included between 30 degrees and 35 degrees from the axial direction of the barrel assembly 20. Further, the included angle between the tangential line of the cross-section line of the extension portion 61 and the axial direction of the barrel assembly 20 is limited to 30-35 degrees, so that the fingers of the user cannot easily slip off the extension portion 61, the discomfort of the user in pressing hands cannot be caused, the ergonomics are met, and the operation comfort of the user is improved.

Illustratively, the included angle R1 between a tangent line about the cross-sectional line of extension 61 and the axial direction of barrel assembly 20 may be any value between 30 degrees and 35 degrees, such as 30 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees, or the like.

In an alternative embodiment, as shown in fig. 4 and 5, the geometry of the third recess 60 varies continuously, i.e., the third recess 60 is configured as a curved surface with a continuously varying geometry. Through the arrangement, the lines on the outer surface of the handle 11 are smooth, the appearance is coordinated and attractive, and the use experience of a user is improved. And the user can make the forefinger laminate the third concave part 60 as far as possible when holding the handle 11, which accords with ergonomics and improves the use experience of the user.

In an alternative embodiment, an active area is formed between the upper and lower ends of the third recess 60 in the height direction of the handle 11, and the active area includes at least one index finger for accommodating an index finger so that the index finger has enough space to move up and down, and since the index finger may move involuntarily when the user performs the spreading operation or the retracting operation, the active area is formed between the upper and lower ends of the third recess 60 so that the index finger has enough space to move up and down to avoid the erroneous touching of the operation key 70.

In an alternative embodiment, as shown in fig. 5, a mounting groove 113 is formed in a position of the handle 11 below the extension portion 61, and the operation key 70 is accommodated in the mounting groove 113, in this embodiment, the operation key 70 is disposed below the extension portion 61 in a manner of semi-surrounding by the arrangement of the mounting groove 113, so that the extension portion 61 protruding toward the front side is approximately flush with the outer wall of the operation key 70 protruding from the front side, which not only can prevent the operation key 70 from being touched by mistake, but also has a coordinated and attractive appearance, and improves the use experience of the user.

In an alternative embodiment, as shown in fig. 1-4, two first recesses 40 are connected to the second recess 50, the third recess 60 at a first side 111 and a second side 112, respectively; and the geometry continuously varies between the first recess 40 and the second recess 50, and between the first recess 40 and the third recess 60. Through the arrangement, the lines on the outer surface of the handle 11 are smooth, the appearance is coordinated and attractive, and the use experience of a user is improved. Moreover, when the user holds the handle 11, the thumb can be attached to the first concave portion 40, the tiger mouth is attached to the second concave portion 50, and the index finger is attached to the third concave portion 60 as much as possible, so that the human engineering is met, and the use experience of the user is improved.

In an alternative embodiment, as shown in fig. 1 to 4, the first concave portion 40, the second concave portion 50 of the first side 111, the first concave portion 40 and the third concave portion 60 of the second side 112 are sequentially connected end to form a continuous curved surface, the geometric shape is continuously changed, and through the arrangement, the line on the outer surface of the handle 11 is smooth, the appearance is coordinated and attractive, and the use experience of a user is improved. And each part of the hand can be attached as much as possible when the user holds the handle 11, which accords with the ergonomics and improves the use experience of the user.

In an alternative embodiment, as shown in fig. 5, the end of the trigger 12 near the operation key 70 is further provided with a relief surface 122, and the relief surface 122 is inclined toward the direction away from the operation key 70, so as to prevent the movement path of the trigger 12 from interfering with the movement path of the key. In this embodiment, since the third recess 60 is required to be disposed above the operation key 70, in order to avoid the space of the operation key 70 from being compressed, an inclined downward avoidance surface 122 is disposed at the upper end of the trigger 12, so as to avoid the operation key 70, to prevent the movement path of the trigger 12 from interfering with the movement path of the key, and to facilitate the user to press the function key.

In an alternative embodiment, as shown in FIG. 5, handle 11 has a bottom surface 114 that mates with trigger 12, with the projection of bottom surface 114 on plane of symmetry A-A being angled with respect to the direction of extension of barrel assembly 20 to avoid the path of movement of trigger 12. In this embodiment, the bottom surface 114 is disposed in such a manner as to be inclined upward, so as to avoid interference with the operation portion 121 of the wrench, and not to press against other hand positions. It should be noted that in the embodiments of the present application, the projections are all orthographic projections, that is, after a projection plane is selected, an orthographic projection view is formed on the projection plane.

In an alternative embodiment, as shown in fig. 1 and 5, the first recess portion 40 and the operation portion 121 are both close to the bottom surface 114, so as to reduce the volume of the handle 11, so as to keep the holding distance of the user in a proper range, meet the holding distance that the user can hold for a long time without fatigue, and meet the travel of the user for performing the opening operation and the closing operation.

In an alternative embodiment, as shown in fig. 4, the handle assembly 10 further includes a rotation shaft 13, a transmission member 14 and a trigger 12, the rotation shaft 13 is provided on the handle 11, the transmission member 14 has opposite first and second ends, the first end is connected to the pull rod, the second end is connected to the trigger 12, and the transmission member 14 can rotate relative to the rotation shaft 13 and form a motion fit relationship with the pull rod; such that trigger 12 moves about rotational axis 13 and actuator assembly 30 is controlled by the pull rod of barrel assembly 20, with a minimum distance L2 from rotational axis 13 to central axis 21 of 15mm-25mm on plane of symmetry A-A. Because the lever principle, the distance L2 between the rotating shaft 13 and the central shaft 21 is a power arm, the longer the power arm is, the more labor-saving, so that the minimum distance L2 between the rotating shaft 13 and the central shaft 21 is set within the range of 15mm-25mm, and a user can save more labor when operating the trigger 12 to control the actuator assembly 30 to open or close.

Specifically, the convex hull 115 can be arranged at the top of the main body 11a, and the surface geometric shapes of the convex hull 115 and other parts of the top of the main body 11a are continuously changed, so that the lines on the outer surface of the handle 11 are smooth, the appearance is coordinated and attractive, and the use experience of a user is improved. The rotation shaft 13 is disposed inside the convex hull 115 to move up the position of the rotation shaft 13, thereby extending the distance from the rotation shaft 13 to the central shaft 21, so that a user can save more effort when operating the trigger 12 to control the actuator assembly 30 to be opened or closed.

Illustratively, the minimum distance of the rotational axis 13 from the central axis 21 on the plane of symmetry A-A may be any value between 15mm and 25mm, such as 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, etc.

In an alternative embodiment, as shown in fig. 4, the tail portion of the side of the main body 11a facing away from the actuator assembly 30 may extend downward toward the grip 11b, and the contact surface 51 is located at the bottom of the tail portion, so that, by means of the tail portion being disposed below the tail portion, not only the volume of the handle 11 can be reduced, but also the soft tissue portion at the tiger mouth can be pressed when the user grips the handle 11, so that the hard joints of the root portions of the thumb and the index finger are prevented from being pressed during operation, thereby being capable of fitting the hand of the user more, improving the stability of gripping the handle 11, and avoiding shaking of the actuator assembly 30.

Of course, the extending direction of the tail of the main body 11a is not limited to the above arrangement, and for example, in other embodiments, as shown in fig. 8, the tail of the main body 11a may extend upward in a direction away from the grip 11 b. In this embodiment, the tail of the main body 11a extends obliquely upward to facilitate grasping by a user.

Of course, in other embodiments, the tail of the body 11a may also extend horizontally along the axial direction of the barrel assembly 20. In this embodiment, the tail portion of the main body 11a extends along the axial direction of the barrel assembly 20 to fit properly against the hand of the user and to facilitate gripping by the user.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A surgical instrument, comprising: the gun comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the actuator assembly is connected with the handle assembly through the gun barrel assembly; the handle assembly comprises a main body and a grip, wherein the main body and the grip are in transitional connection with each other on a first side and a second side which are symmetrical based on a symmetrical plane, so that the first concave part can be used for accommodating fingers of a user when the user holds the surgical instrument; the main body and the handle are also in transitional connection to form a second concave part and a third concave part, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the plane of symmetry; it is characterized in that the method comprises the steps of,

And on a projection plane perpendicular to the symmetry plane and parallel to the central axis, the main body corresponding to the first concave part completely falls into a second projection area of the grip corresponding to the first concave part on the projection plane in a first projection area of the projection plane.

2. The surgical instrument of claim 1, wherein an area of the first projection area is smaller than an area of the second projection area; and the first projection area and/or the second projection area are axisymmetric patterns.

3. The surgical instrument of claim 1, wherein the second recess is configured to conform to a tiger jaw of the user; on a section parallel to the axial direction and perpendicular to the symmetry plane, the section line of the handle assembly at the second concave part firstly contracts towards the inside of the handle assembly and then expands towards the outside of the handle assembly, and the section line geometric shape of the handle assembly at the second concave part continuously changes.

4. A surgical instrument according to claim 3, wherein, in a cross-sectional view of the plane of symmetry, at least one tangent line is parallel to the central axis on a cross-sectional line of the second recess.

5. A surgical instrument as recited in claim 3, wherein said second recess is further provided with a contact surface, said contact surface being at least partially formed in said body; and in a continuous section perpendicular to the central axis of the barrel assembly, the cross-sectional line of the contact surface formed in the body tapers away from the actuator assembly; the cross-sectional line geometry of the contact surface varies continuously.

6. The surgical instrument of any one of claims 1-5, wherein the geometry of the second recess varies continuously.

7. The surgical instrument of claim 1, wherein the handle assembly further comprises an operating button, the third recess being disposed adjacent to the operating button for holding the user's finger; wherein,

The third concave part extends to form an extension part close to the side wall of the operation key, and the extension part is at least approximately flush with the outer edge of the operation key, which faces the outer edge of the actuator assembly, so as to prevent the finger of the user from sliding out from the edge to touch the operation key.

8. The surgical instrument of claim 7, wherein the third recess has a maximum recess depth in the axial direction of 6mm-10mm.

9. The surgical instrument of claim 7, wherein, in a cross-sectional view of the plane of symmetry, a tangent to the extension at each point along the cross-sectional line is at an angle between 20 degrees and 40 degrees from the axial direction.

10. The surgical instrument of any one of claims 7-9, wherein the geometry of the third recess continuously varies.

11. The surgical instrument of any one of claims 1-4, 6-8, wherein two of the first recesses are connected to the second recess and the third recess on a first side and a second side, respectively; and the geometric shapes between the first concave part and the second concave part and between the first concave part and the third concave part are continuously changed.

12. The surgical instrument of claim 11, wherein the first recess, the second recess, the first recess and the third recess of the first side are sequentially connected end to form a continuous curve with a continuously varying geometry.

13. The surgical instrument of any one of claims 1-4, 6-8, the handle assembly further comprising a rotational axis and a trigger, the trigger being movable about the rotational axis and controlling movement of the actuator assembly via a pull rod of the barrel assembly, wherein a minimum distance from the rotational axis to the central axis on the plane of symmetry is 15mm-25mm.

14. A surgical instrument, comprising: the gun comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the actuator assembly is connected with the handle assembly through the gun barrel assembly; the handle assembly comprises a main body and a grip, wherein the main body and the grip are in transitional connection with each other on a first side and a second side which are symmetrical based on a symmetrical plane, so that the first concave part can be used for accommodating fingers of a user when the user holds the surgical instrument; the main body is in transitional connection with the grip, a second concave part and a third concave part are further formed, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the plane of symmetry; it is characterized in that the method comprises the steps of,

15. The surgical instrument of claim 14, wherein the second recess is configured to conform to a user's tiger jaw;

On a section parallel to the axial direction and perpendicular to the symmetry plane, a section line of the handle assembly at the second concave part firstly contracts towards the interior of the handle assembly and then expands towards the exterior of the handle assembly, and the section line geometry of the handle assembly at the second concave part continuously changes;

At least one tangential line is parallel to the axial direction on a cross-sectional view of the symmetry plane on a cross-sectional line of the second recess.

16. The surgical instrument of claim 14, wherein the second recess is disposed between the body and the grip and is distal from the actuator assembly in the axial direction; the second concave part is also provided with a contact surface, and the contact surface is at least partially formed on the main body; and in a continuous section perpendicular to the central axis of the barrel assembly, the cross-sectional line of the contact surface formed in the body tapers away from the actuator assembly; the cross-sectional line geometry of the contact surface varies continuously.

17. The surgical instrument of claim 14, wherein the handle assembly further comprises an operating button, the third recess being disposed axially adjacent the operating button for holding a user's finger; wherein,

18. A surgical instrument, comprising: the gun comprises an actuator assembly, a gun barrel assembly and a handle assembly, wherein the actuator assembly is connected with the handle assembly through the gun barrel assembly; the handle assembly comprises a main body and a grip, wherein the main body and the grip are in transitional connection with each other on a first side and a second side which are symmetrical based on a symmetrical plane, so that the first concave part can be used for accommodating fingers of a user when the user holds the surgical instrument; the main body is in transitional connection with the grip, a second concave part and a third concave part are further formed, the second concave part is far away from the actuator assembly along the axial direction of the gun barrel assembly, and the third concave part is close to the actuator assembly; wherein the central axis of the barrel assembly is located on the plane of symmetry; it is characterized in that the method comprises the steps of,

19. The surgical instrument of claim 18, wherein the second recess is configured to conform to a user's tiger jaw;

20. The surgical instrument of claim 18, wherein the second recess is disposed between the body and the grip axially away from the actuator assembly; the second concave part is also provided with a contact surface, and the contact surface is at least partially formed on the main body; and in a continuous section perpendicular to the central axis of the barrel assembly, the cross-sectional line of the contact surface formed in the body tapers away from the actuator assembly; the cross-sectional line geometry of the contact surface varies continuously.

21. The surgical instrument of claim 18, wherein the handle assembly further comprises an operating button, the third recess being disposed axially adjacent the operating button for holding a user's finger; wherein,

22. A surgical instrument, comprising:

23. The surgical instrument of claim 22, wherein the first support structure further comprises a second edge, the handle defining a first recess between the first edge and the second edge, the first recess being a continuous curved surface and, in a continuous section perpendicular to the axial direction of the barrel assembly, the first edge being spaced from the plane of symmetry a greater distance than the second edge is spaced from the plane of symmetry in the current section.

24. A surgical instrument as recited in claim 22, wherein the second side is formed with a second support structure, the first support structure and the second support structure being symmetrically disposed relative to the plane of symmetry.

25. The surgical instrument of claim 22, wherein a side of the handle facing away from the actuator assembly is further provided with a second recess recessed toward an inside of the handle, the second recess being adapted to engage a jaw of the user;

The first edge includes a first sub-edge and a second sub-edge that extends obliquely from an end proximate the second recess toward the trigger to the first sub-edge to form, in cooperation with an outer surface of the handle, a continuous curved surface extending from the second recess toward the trigger.

26. The surgical instrument of claim 25, wherein, in a cross-section parallel to the axial direction and perpendicular to the plane of symmetry, a cross-section line of the handle assembly at the second recess first contracts toward the interior of the handle and then expands toward the exterior of the handle, and a cross-section line geometry of the handle at the second recess continuously varies.

27. The surgical instrument of claim 25 or 26, wherein the second recess has a contact surface for engaging a tiger jaw of the user; wherein the contact surface is on a cross-sectional line of the cross-sectional view of the symmetry plane, and at least one tangential line is parallel to the axial direction of the barrel assembly.

28. The surgical instrument of claim 25 or 26, wherein the first sub-edge is configured to transition to the second sub-edge in the form of a curve having a geometric continuity of no less than a first order, and the first sub-edge and the second sub-edge are each a curve having a geometric continuity of no less than a first order.

29. The surgical instrument of claim 22, further comprising an operating button provided on the handle, the operating button being used to activate the surgical instrument to control the effector assembly to treat biological tissue;

The handle is provided with an operation key, and the operation key is arranged on the handle;

30. The surgical instrument of claim 29, wherein a minimum distance between the first edge and the trigger is less than a minimum distance between the extension and the trigger.

31. The surgical instrument of claim 29, wherein the third recess is configured as a continuously geometrically varying curved surface.

32. The surgical instrument of claim 29, wherein an end of the trigger adjacent to the operating button further comprises a relief surface, the relief surface being disposed obliquely away from the operating button to prevent interference between a path of movement of the trigger and a path of movement of the button; and/or the number of the groups of groups,

The handle is provided with a bottom surface matched with the trigger, and the projection of the bottom surface on the symmetrical surface is obliquely arranged relative to the extending direction of the gun barrel assembly so as to avoid the movement path of the trigger.

33. A surgical instrument according to any one of claims 22 to 32, wherein the surface of the first support structure is provided with a non-slip arrangement.

34. The surgical instrument of any one of claims 22 to 32, further comprising:

the rotating shaft is arranged on the handle;

the transmission piece is provided with a first end and a second end which are opposite, the first end is connected with the pull rod, the second end is connected with the trigger, and the transmission piece can rotate relative to the rotating shaft and form a motion fit relation with the pull rod;

wherein, on the symmetry plane, the distance from the rotation axis to the central axis is 15mm-25mm.

35. A surgical instrument, comprising:

36. The surgical instrument of claim 35, wherein the handle further comprises a body and a grip, the second recess disposed between the body and the grip, the grip disposed in cooperation with the trigger;

The contact surface is partially formed on the body; the section line formed by the part of the contact surface formed on the main body is gradually shortened towards the direction away from the actuator assembly in the continuous section perpendicular to the axial direction of the clamp tube;

and the contact surface has a geometric continuity of not less than a first order.