Reset mechanism and surgical operating instrument

Abstract

The utility model provides a resetting mechanism and a surgical operating instrument, the resetting mechanism is used for resetting a self-rotating gear in the surgical operating instrument, the resetting mechanism comprises a resetting piece and a boss arranged on the end face of the self-rotating gear; the reset piece is arranged on one side of the end face of the autorotation gear, a notch is formed in the reset piece, and the boss is arranged in the notch; when the self-rotating gear is driven by preset power to rotate forwards or reversely, the reset piece is collided and deformed through the boss, and when the self-rotating gear loses the preset power, the reset deformation of the reset piece enables the self-rotating gear to be reset to the initial position. According to the utility model, the resetting mechanism is additionally arranged, so that the rotation turntable of the instrument is always kept in a zero position state through self-resetting before butt joint, the joint time of the instrument and a power source is shortened, the possibility of joint failure is reduced, and the joint reliability is improved; meanwhile, the size of the reset mechanism is reduced, and the zero returning precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a resetting mechanism and a surgical instrument. Background Art

[0002] Minimally invasive surgery has been quickly accepted by doctors and patients due to its advantages such as small surgical incision, low bleeding, small postoperative scars, and fast recovery. However, traditional minimally invasive surgery is a challenge for doctors. On the one hand, it is a change from the operating habits of open surgery, and on the other hand, it is restricted by the low flexibility of surgical instruments, which makes doctors have new requirements for surgical instruments with high flexibility, simple operation, and precise movements. With the development of science and technology, minimally invasive surgical robots have changed the pattern of minimally invasive surgery. They have the characteristics of high flexibility, accuracy, and stable operation, and are gradually accepted by surgeons. Surgical instruments are an important part of surgical robots and also the end execution part. Their performance plays a vital role in the quality of surgical results. Therefore, surgical instruments with high flexibility, stable and reliable performance have become the research direction in recent years. Existing surgical robot instruments usually do not have their own power source (motor) and need to be docked with the rear-end power source to drive the instrument to perform corresponding actions. The instrument generally has four degrees of freedom, including rotation, pitch, and left and right yaw. Each degree of freedom corresponds to an instrument turntable. When docking, each turntable needs to be engaged with the corresponding turntable of the power source part.

[0003] When the instrument is docked, the instrument turntable needs to be connected to the power source to achieve power transmission. The turntables corresponding to the three degrees of freedom of pitch, left and right yaw are basically in a zero position due to the limiting effect of the stamping card when they are connected, and they can be easily connected when they are connected; and the degree of freedom of rotation is not limited by the stamping card, so its position is uncertain, and it can stay at any position within its free rotation range, which brings difficulties to the connection between the power source turntable and the instrument box turntable, increases the difficulty of connection and the time of docking, and even causes the phenomenon of being unable to connect, reducing the reliability of the system, wherein the instrument box turntable is connected to the self-rotating gear. Another example is the Chinese patent application with patent application number CN113813050A, which discloses surgical instruments and surgical robots, and in particular discloses a flexible transmission member, which is used to perform the rotation reset of the assembly. The solution of this patent occupies a large size space, and the bidirectional reset force is inconsistent, the return to zero accuracy is poor, it is difficult to meet the effect of self-spin reset, and power needs to be provided to achieve transmission reset, so it is urgent to provide a solution to improve the reset problem of the self-rotating turntable. Utility Model Content

[0004] The utility model aims to provide a reset mechanism and a surgical instrument. By adding the reset mechanism, the rotating disk of the instrument can always maintain a zero position state through self-reset before docking, thereby shortening the connection time between the instrument and the power source, reducing the possibility of connection failure, and increasing the reliability of the connection; at the same time, the size of the reset mechanism is reduced and the return to zero accuracy is improved.

[0005] To achieve the above-mentioned purpose, the utility model provides a reset mechanism for resetting a self-rotating gear in a surgical instrument, the reset mechanism comprising a reset member and a boss provided on the end surface of the self-rotating gear;

[0006] The reset member is arranged on one side of the end surface of the self-rotating gear, and a notch is arranged on the reset member, and the boss is arranged in the notch;

[0007] When the self-rotating gear is driven by a preset power to rotate forward or reverse, the reset member will be deformed by the boss. When the self-rotating gear loses the preset power, the reset deformation of the reset member will reset the self-rotating gear to its initial position.

[0008] Optionally, the reset member includes a limit seat and a reset spring;

[0009] The limit seat is separated from the self-rotating gear, and a moving area for the boss to move is formed between the limit seat and the self-rotating gear. The limit seat is provided with a groove, and the groove has a first opening facing the moving area.

[0010] The return spring is movably disposed in the groove, and both ends of the return spring in the length direction are respectively in contact with the wall of the groove; wherein a portion of the return spring extends out of the first opening and extends into the moving area.

[0011] Optionally, both ends of the return spring in the length direction are in contact with the boss.

[0012] Optionally, the grooves are symmetrically arranged about the bosses.

[0013] Optionally, the limiting seat, the groove and the boss are all fan-shaped structures, wherein the curvature of the fan-shaped structure is consistent with the curvature of the self-rotating gear.

[0014] Optionally, the resetting member further comprises a fixing ear disposed on the limiting seat, and the fixing ear is provided with a mounting hole; wherein the limiting seat is fixed in the instrument box assembly via the fixing ear.

[0015] Optionally, the limit seat includes a transverse section, a first vertical section, a second vertical section and a third vertical section;

[0016] The first vertical section and the second vertical section are arranged on the same side of the transverse section, and the groove is formed between the first vertical section and the second vertical section, and the groove has a second opening facing the notch;

[0017] The third vertical segment is disposed between the first vertical segment and the second vertical segment and is disposed close to ends of the first vertical segment and the second vertical segment in the length direction to block the second opening.

[0018] Optionally, the limiting seat is on an axial section of the rotating gear, and the first vertical section and the second vertical section are arranged in parallel, so that the groove cavity cross-section of the groove has a rectangular structure.

[0019] Optionally, on the axial section of the rotating gear, the transverse section, the first vertical section and the second vertical section of the limit seat are all bent toward the groove so that the groove cavity cross-section presents a circular structure that is compatible with the return spring.

[0020] A surgical instrument comprises an instrument box assembly, a connecting rod, an operating assembly and a transmission assembly, and the reset mechanism;

[0021] The instrument box assembly comprises a housing and a rotating turntable rotatably arranged on the housing;

[0022] The transmission assembly includes a self-rotating gear and a transmission gear, both of which are rotatably arranged in the instrument box assembly, and the self-rotating gear and the transmission gear are meshed with each other, and the self-rotating gear is connected to the self-rotating turntable; one end of the connecting rod is connected to the transmission gear, and the other end of the connecting rod is connected to the operating assembly.

[0023] The beneficial effects of the utility model are as follows:

[0024] The utility model is provided with a combination structure of a reset member and a boss. When the self-rotating gear loses the preset power, the reset deformation of the reset member will reset the self-rotating gear to the initial position. In this way, the self-rotating turntable of the instrument always maintains a zero position state through self-reset before docking, shortening the connection time between the instrument and the power source, reducing the possibility of connection failure, and increasing the reliability of the connection; at the same time, the size of the reset mechanism is reduced, and the return to zero accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0026] Figure 2 For this utility model Figure 1 Schematic diagram of the explosion structure;

[0027] Figure 3 For this utility model Figure 2 Schematic diagram of the center reset component viewed from above

[0028] Figure 4 This is a schematic diagram of the structure in which the boss in the utility model is installed on the self-rotating gear;

[0029] Figure 5 This is a schematic diagram of the structure of the surgical instrument in the utility model;

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the instrument box assembly in the utility model.

[0031] Reference numerals

[0032] 1. Operation components;

[0033] 2. Connecting rod;

[0034] 3. Instrument box assembly; 3-5. Transmission gear; 3-6. Rotation gear; 3-6-1. Boss; 3-7. Rotation shaft; 3-8. Return spring; 3-9. Limit seat; 3-9-1. Horizontal section; 3-9-2. First vertical section; 3-9-3. Second vertical section; 3-9-4. Third vertical section; 3-9-5. Groove; 3-9-6. Second opening; 3-10. Transmission bottom plate; 3-11. Transmission top plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the utility model belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0036] In view of the problems existing in the prior art, an embodiment of the utility model provides a reset mechanism for resetting the self-rotating gear 3-6 in a surgical instrument. The reset mechanism includes a reset member and a boss 3-6-1 provided on the end surface of the self-rotating gear 3-6. Figure 1It should be noted that the self-rotating gear 3-6 is sleeved outside the self-rotating shaft 3-7 and is connected to the self-rotating turntable through the self-rotating shaft 3-7. The reset member is arranged in the instrument box assembly 3. The self-rotating gear 3-6 is rotatably arranged in the instrument box assembly 3.

[0037] Specifically, the reset member is arranged on one side of the end face of the self-rotating gear 3-6 (which can be understood as the upper side of the self-rotating gear 3-6), and a notch (not numbered) is arranged on the reset member, and the boss 3-6-1 is arranged in the notch. When the self-rotating gear 3-6 is driven by a preset power to rotate forward or reverse, the reset member will be deformed by the boss 3-6-1. When the self-rotating gear 3-6 loses the preset power, the reset deformation of the reset member will reset the self-rotating gear 3-6 of the self-rotating turntable to its initial position.

[0038] exist Figure 1 In the example, the reset process of the self-rotating gear 3-6 is generated by the reset deformation of the reset member, and no external power source is required. In this way, when the self-rotating gear 3-6 loses the preset power, the reset process can be completed under the drive of the reset member, so that the self-rotating turntable of the instrument always maintains a zero position state through self-reset before docking, shortening the engagement time between the instrument and the power source, reducing the possibility of engagement failure, and increasing the reliability of engagement; at the same time, the reset member is only arranged on one side of the self-rotating turntable, without occupying a large space, reducing the size of the reset mechanism, and improving the return to zero accuracy.

[0039] In one embodiment, the reset member provides a first implementation mode. Specifically, the reset member includes an elastic telescopic rod (not shown). When the autorotation gear 3-6 is driven to rotate by a preset power, the elastic telescopic rod is compressed and deformed through the boss 3-6-1. When the autorotation gear 3-6 loses the preset power, the elastic telescopic rod is deformed and reset to restore the autorotation gear 3-6.

[0040] In one embodiment, the reset member provides a second implementation mode, wherein the reset member includes a limit seat 3-9 and a reset spring 3-8, such as Figure 2As shown. Specifically, the limit seat 3-9 is separately arranged from the self-rotating gear 3-6, and a moving area for the boss 3-6-1 to move is formed between the limit seat 3-9 and the self-rotating gear 3-6, and a groove 3-9-5 is provided on the limit seat 3-9, and the groove 3-9-5 has a first opening facing the moving area. The reset spring 3-8 is movably arranged in the groove 3-9-5, and the two ends of the reset spring 3-8 in the length direction are respectively abutted against the wall of the groove 3-9-5; wherein, part of the reset spring 3-8 extends out of the first opening and extends into the moving area. It is worth noting that the reset spring 3-8 is in a compressed state in the groove 3-9-5.

[0041] It should be understood that the return spring 3-8 has an A end and a B end in the length direction. Figure 3 As shown, the A end and the B end are both in contact with the wall of the groove 3-9-5; the boss 3-6-1 has a C end and a D end, as shown in FIG. Figure 4 As shown, the C end is in contact with the B end, and the D end is in contact with the A end. When the self-rotating gear 3-6 is driven by the preset power to rotate counterclockwise, the D end contacts the A end, and the C end is separated from the B end. Since the B end is contacted by the wall of the groove 3-9-5 at this time, the reset spring 3-8 is compressed and moves in the counterclockwise direction. When the self-rotating gear 3-6 loses the preset power, the reset deformation of the reset spring 3-8 pushes the self-rotating gear 3-6 to perform a reset movement through the boss 3-6-1 until the boss 3-6-1 enters the gap. When the resistance force of the C end on the B end is consistent with the resistance force of the D end on the A end, the self-rotating gear 3-6 is reset to the initial position. The clockwise rotation of the self-rotating gear 3-6 is consistent with the reset principle of the counterclockwise rotation of the self-rotating gear 3-6, which will not be repeated here. In this embodiment, the deformation of the reset spring 3-8 is used as the reset power source, which can reduce the size of the reset mechanism and improve the return to zero accuracy.

[0042] Specifically, the difference between the first embodiment and the second embodiment of the reset member is that the elastic telescopic rod in the first embodiment has a simple structure and is easy to prepare using existing processes, but after local damage occurs, it needs to be discarded as a whole, causing waste; the structure in the second embodiment is simpler than that in the first embodiment, and adopts an assembled structure. It only requires replacing the damaged part to make the reset member usable again without replacement, thereby achieving the effect of saving resources.

[0043] In one embodiment, both ends of the return spring 3-8 in the length direction are in contact with the boss 3-6-1. Figure 1As shown. That is, the C end is in contact with the B end, and the D end is in contact with the A end. In this embodiment, by respectively setting the two ends of the reset spring 3-8 and the boss 3-6-1 in contact with each other, it can be ensured that the reset force provided by the reset spring 3-8 is consistent whether it is compressed clockwise or counterclockwise, so that the self-rotating gear 3-6 can always be reset to the initial position.

[0044] In one embodiment, the groove 3-9-5 is symmetrically arranged with respect to the boss 3-6-1; in one example, the groove 3-9-5 is a single groove cavity, and in another example, the groove 3-9-5 includes two groove cavities. Specifically, in this embodiment, the groove 3-9-5 is symmetrically arranged with respect to the boss 3-6-1, which means that the return spring 3-8 installed in the groove 3-9-5 is also symmetrically arranged with respect to the boss 3-6-1, ensuring that when the self-rotating gear 3-6 rotates counterclockwise or clockwise by the same angle, the compression degree of the return spring 3-8 is consistent.

[0045] Exemplarily, a return spring 3-8 is arranged in the groove cavity. The length of the return spring 3-8 arranged in the groove 3-9-5 as a single groove cavity is greater than the length of the return spring 3-8 arranged in the groove 3-9-5 including two groove cavities. It is worth noting that in the example where the groove 3-9-5 is a single groove cavity, the rotation degree of the self-rotating gear 3-6 in both the forward and reverse directions can be greater than 180°; in the example where the groove 3-9-5 includes two groove cavities, the rotation degree of the self-rotating gear 3-6 in both the forward and reverse directions is not greater than 180°.

[0046] In one embodiment, the limit seat 3-9, the groove 3-9-5 and the boss 3-6-1 are all fan-shaped structures, wherein the curvature of the fan-shaped structure is consistent with the curvature of the self-rotating gear 3-6. Such an arrangement can ensure that the length directions of the limit seat 3-9, the groove 3-9-5 and the boss 3-6-1 are all adapted to the circumference of the self-rotating gear 3-6, so that when the boss 3-6-1 moves against the return spring 3-8, the return spring 3-8 can move along the circumference of the self-rotating gear 3-6, thereby making the movement process smoother and preventing the occurrence of jamming, thereby making the return force of the return spring 3-8 act on the reset of the self-rotating gear 3-6 (the loss part is negligible), ensuring that the self-rotating gear 3-6 can always be reset to the initial position. It is worth noting that the limit seat 3-9 can be understood as an annular structure, and the notch with a fan-shaped cavity is dug out on the annular structure.

[0047] Exemplarily, the size of the limit seat 3-9 and the groove 3-9-5 is much larger than the size of the boss 3-6-1, so that the range of the deformation angle of the return spring 3-8 is larger.

[0048] In one embodiment, the reset member further includes a fixing ear (unnumbered) provided on the limit seat 3-9, and a mounting hole (unnumbered) is provided on the fixing ear; wherein the limit seat 3-9 is fixed in the instrument box assembly 3 through the fixing ear. The setting of the combination structure of the fixing ear and the mounting hole is used for the connection of the limit seat 3-9. Specifically, the limit seat 3-9 can be fixed on the transmission base plate 3-10 through the above-mentioned combination structure. The reset member further includes a locking member (not shown), and the locking member enters into a threaded hole (unnumbered) provided on the transmission base plate 3-10 through the mounting hole to fix the transmission base plate 3-10 and the limit seat 3-9 together. It is worth noting that the fixing ear is fixed on the outer ring wall of the annular structure, and a plurality of the fixing ears are provided.

[0049] In one embodiment, the limit seat 3-9 includes a transverse section 3-9-1, a first vertical section 3-9-2, a second vertical section 3-9-3 and a third vertical section 3-9-4. Figure 3 The first vertical section 3-9-2 and the second vertical section 3-9-3 are arranged on the same side of the transverse section 3-9-1, and the groove 3-9-5 is formed between the first vertical section 3-9-2 and the second vertical section 3-9-3, and the groove 3-9-5 has a second opening 3-9-6 facing the notch; the third vertical section 3-9-4 is arranged between the first vertical section 3-9-2 and the second vertical section 3-9-3, and is arranged close to the ends of the first vertical section 3-9-2 and the second vertical section 3-9-3 in the length direction to block the second opening 3-9-6.

[0050] In one example, the limit seat 3-9 is on the axial section (which can be understood as the section in the vertical direction) of the rotating gear 3-6, and the first vertical section 3-9-2 is arranged parallel to the second vertical section 3-9-3 so that the groove cavity cross-section of the groove 3-9-5 has a rectangular structure. In this example, the horizontal dimension of the opening of the groove 3-9-5 toward the moving area is consistent with the length dimension of the rectangular structure; the transverse section 3-9-1, the first vertical section 3-9-2, the second vertical section 3-9-3 and the third vertical section 3-9-4 are an integral structure; the return spring 3-8 can be installed from the opening toward the moving area into the groove 3-9-5, making the installation process of the return spring 3-8 more convenient; however, in this example, the return spring 3-8 is in conflict with the surface of the autorotation gear 3-6, so that the return spring 3-8 is limited in the groove 3-9-5 through the autorotation gear 3-6. When the return spring 3-8 moves, friction will be generated with the autorotation gear 3-6, which will cause wear of the autorotation gear 3-6 and the return spring 3-8, shortening the service life of the autorotation gear 3-6 and the return spring 3-8.

[0051] In another example, the limit seat 3-9 is on the axial section of the rotating gear 3-6, and the transverse section 3-9-1, the first vertical section 3-9-2 and the second vertical section 3-9-3 are all bent toward the groove 3-9-5, so that the groove cavity cross-section of the groove 3-9-5 presents a circular structure that is compatible with the reset spring 3-8. In this example, the size of the opening of the groove 3-9-5 in the horizontal direction toward the moving area is smaller than the diameter of the circular structure (and the opening size is also smaller than the diameter of the reset spring 3-8). The transverse section 3-9-1, the first vertical section 3-9-2 and the second vertical section 3-9-3 are an integral structure, and the third vertical section 3-9-4 can be detachably installed at the second opening 3-9-6. In this example, the return spring 3-8 is installed into the groove 3-9-5 through the second opening 3-9-6. Specifically, the return spring 3-8 is inserted into the second opening 3-9-6 and then into the groove 3-9-5, and then the second opening 3-9-6 is blocked by the third vertical section 3-9-4. In this example, the return spring 3-8 will not contact the self-rotating gear 3-6, so that during the movement of the return spring 3-8, it will not wear the self-rotating gear 3-6, thereby protecting the self-rotating gear 3-6 and the return spring 3-8. It is worth noting that in this example, the outer ring diameter of the return spring 3-8 is consistent with or slightly smaller than the groove diameter of the groove 3-9-5, so that the return spring 3-8 will not shake in the groove 3-9-5, and the return spring 3-8 will not bulge in the groove 3-9-5.

[0052] The utility model also provides a surgical instrument, including an instrument box assembly 3, a connecting rod 2, an operating assembly 1 and a transmission assembly, and the reset mechanism, such as Figure 5 shown.

[0053] The instrument box assembly 3 comprises a housing and a rotating turntable rotatably arranged on the outer surface of the housing. The housing comprises a transmission bottom plate 3-10 and a transmission top plate 3-11 arranged to abut against each other.

[0054] The transmission assembly includes a self-rotating gear 3-6 and a transmission gear 3-5, and the self-rotating gear 3-6 and the transmission gear 3-5 are both rotatably arranged in the instrument box assembly 3, and the self-rotating gear 3-6 and the transmission gear 3-5 are meshed with each other. Figure 6 As shown, the self-rotating gear 3-6 is connected to the self-rotating turntable; one end of the connecting rod 2 is connected to the transmission gear 3-5, and the other end of the connecting rod 2 is connected to the operating assembly 1. Specifically, the self-rotating gear 3-6 is rotatably arranged in the instrument box assembly 3 through the self-rotating shaft 3-7, and is connected to the self-rotating turntable through the self-rotating shaft 3-7.

[0055] In summary, the utility model is provided with a combination structure of a reset member and a boss. When the self-rotating gear 3-6 loses the preset power, the reset deformation of the reset member will reset the self-rotating gear 3-6 to the initial position. In this way, the self-rotating turntable of the instrument always maintains a zero position state through self-reset before docking, shortening the engagement time between the instrument and the power source, reducing the possibility of engagement failure, and increasing the reliability of engagement; at the same time, the size of the reset mechanism is reduced and the return to zero accuracy is improved.

[0056] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A resetting mechanism for resetting a self-rotating gear in a surgical instrument, characterized in that: The reset mechanism comprises a reset member and a boss provided on the end surface of the self-rotating gear; The reset member is arranged on one side of the end surface of the self-rotating gear, and a notch is arranged on the reset member, and the boss is arranged in the notch; When the self-rotating gear is driven by a preset power to rotate forward or reverse, the reset member will be deformed by the boss. When the self-rotating gear loses the preset power, the reset deformation of the reset member will reset the self-rotating gear to its initial position.

2. The reset mechanism according to claim 1, characterized in that: The reset member includes a limit seat and a reset spring; The limit seat is separated from the self-rotating gear, and a moving area for the boss to move is formed between the limit seat and the self-rotating gear. The limit seat is provided with a groove, and the groove has a first opening facing the moving area. The return spring is movably disposed in the groove, and both ends of the return spring in the length direction are respectively in contact with the wall of the groove; wherein a portion of the return spring extends out of the first opening and extends into the moving area.

3. The reset mechanism according to claim 2, characterized in that: Both ends of the return spring in the length direction are in contact with the boss.

4. The reset mechanism according to claim 2, characterized in that: The grooves are symmetrically arranged about the bosses.

5. The reset mechanism according to claim 2, characterized in that: The limiting seat, the groove and the boss are all in a fan-shaped structure, wherein the curvature of the fan-shaped structure is consistent with the curvature of the self-rotating gear.

6. The reset mechanism according to claim 2, characterized in that: The resetting member also includes a fixing ear arranged on the limiting seat, and the fixing ear is provided with a mounting hole; wherein the limiting seat is fixed in the instrument box assembly through the fixing ear.

7. The reset mechanism according to any one of claims 2 to 6, characterized in that: The limit seat includes a transverse section, a first vertical section, a second vertical section and a third vertical section; The first vertical section and the second vertical section are arranged on the same side of the transverse section, and the groove is formed between the first vertical section and the second vertical section, and the groove has a second opening facing the notch; The third vertical segment is disposed between the first vertical segment and the second vertical segment and is disposed close to ends of the first vertical segment and the second vertical segment in the length direction to block the second opening.

8. The reset mechanism according to claim 7, characterized in that: The limiting seat is on the axial section of the rotating gear, and the first vertical section and the second vertical section are arranged in parallel, so that the groove cavity cross-section of the groove has a rectangular structure.

9. The reset mechanism according to claim 7, characterized in that: The limit seat is on the axial section of the rotating gear, and the transverse section, the first vertical section and the second vertical section are all bent toward the groove, so that the groove cavity cross-section of the groove presents a circular structure adapted to the reset spring.

10. A surgical instrument, characterized in that: It comprises an instrument box assembly, a connecting rod, an operating assembly and a transmission assembly, and a resetting mechanism as claimed in any one of claims 1 to 9; The instrument box assembly comprises a housing and a rotating turntable rotatably arranged on the housing; The transmission assembly includes a self-rotating gear and a transmission gear, both of which are rotatably arranged in the instrument box assembly, and the self-rotating gear and the transmission gear are meshed with each other, and the self-rotating gear is connected to the self-rotating turntable; one end of the connecting rod is connected to the transmission gear, and the other end of the connecting rod is connected to the operating assembly.

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