Manual planer for minimally invasive surgery

Abstract

The invention discloses a manual planer for minimally invasive surgery. The manual planer comprises a handle, an outer knife tube, an inner knife tube, a handle, a push-pull support, a first gear, a second gear and a third gear, wherein the second gear and the third gear are rotationally assembled in the handle. The first gear is assembled and connected with the tail end of the inner knife tube; the second gear is in transmission connection with the first gear and the third gear, the handle is pivoted with the handle around a first pivoting center line, and the first pivoting center line and the wheel center line of the first gear are arranged in different planes; the push-pull support is pivoted to the position, away from the first pivoting center line, of the handle around a second pivoting center line, the position, away from the second pivoting center line, of the push-pull support is further in transmission connection with a third gear, and the second pivoting center line, the first pivoting center line, the wheel center line of the second gear and the wheel center line of the third gear are parallel to one another; therefore, the purposes of reducing cost and facilitating operation are achieved.

Description

Technical Field

[0001] The present invention relates to a medical device, and more particularly to a manual shaver for minimally invasive surgery used in conjunction with an endoscope. Background Art

[0002] As is well known, due to shorter recovery time, shorter operation duration and low cost, minimally invasive surgery has become increasingly common in the field of surgery. Minimally invasive surgery is usually performed by inserting instruments through small incisions or artificially formed openings in the patient, and the shaver is a common tool for performing minimally invasive surgery. It is used in conjunction with an endoscope and inserted along the endoscope to the target site to achieve the resection operation of the target.

[0003] However, in the existing shaver, a motor is used to drive the inner cutter tube to rotate relative to the outer cutter tube. Therefore, during use, a cable is required to electrically connect the motor to the host device to meet the power supply and control requirements of the host device for the motor. This will increase the cost and operation steps of the shaver.

[0004] Therefore, there is an urgent need for a manual shaver for minimally invasive surgery to overcome one or more of the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a manual shaver for minimally invasive surgery that can reduce costs and is easy to operate.

[0006] To achieve the above purpose, the manual shaver for minimally invasive surgery of the present invention includes a handle, an outer cutter tube, an inner cutter tube, a handle grip, a push-pull bracket, a first gear, a second gear and a third gear. The tail end of the outer cutter tube is assembled on the handle, the inner cutter tube is located inside the outer cutter tube, and the tail end of the inner cutter tube extends out of the tail end of the outer cutter tube. The first gear is assembled and connected to the tail end of the inner cutter tube, the second gear and the third gear are rotatably assembled inside the handle, and the second gear is respectively in transmission connection with the first gear and the third gear. The handle grip is pivotally connected to the handle around a first pivotal center line, and the first pivotal center line is arranged skew to the center line of the first gear. The push-pull bracket is pivotally connected to the position of the handle grip away from the first pivotal center line around a second pivotal center line, and the position of the push-pull bracket away from the second pivotal center line is also in transmission connection with the third gear. The second pivotal center line, the first pivotal center line, the center line of the second gear and the center line of the third gear are parallel to each other. Wherein, during the reciprocating pivotal swing of the handle grip around the first pivotal center line, the inner cutter tube is driven to rotate forward and backward relative to the outer cutter tube through the push-pull bracket, the third gear, the second gear and the first gear.

[0007] Compared with the prior art, with the design of "the first pivot center line around which the handle pivots is arranged in a skew plane with the center line of the first gear, and the second pivot center line, the first pivot center line, the center line of the second gear and the center line of the third gear are parallel to each other", an operator can apply force with one hand while grasping the handle and the grip to make the grip reciprocally pivot around the first pivot center line. The reciprocally pivoting grip can drive the inner cutter tube to rotate forward and backward relative to the outer cutter tube through the push-pull bracket, the third gear, the second gear and the first gear, eliminating the motor, the device for supplying power to the motor and controlling the forward and reverse rotation, as well as the wiring operation between the motor and the device, thereby reducing costs and simplifying the operation steps. Also, since the grip drives the inner cutter tube to rotate relative to the outer cutter tube through the push-pull bracket, the third gear, the second gear and the first gear, the stability is better and the transmission accuracy is higher.

[0008] Preferably, the manual shaver for minimally invasive surgery of the present invention further includes a suction pipeline disposed in the handle. The suction pipeline is arranged in a straight line extension, and an external suction joint exposed from the tail end of the handle is provided at the tail end of the suction pipeline; a through channel is provided in the middle of the first gear. The head end of the through channel is in sealing and mating connection with the tail end of the inner cutter tube, and the opposite tail end of the through channel is in sealing and mating connection with the suction pipeline.

[0009] Preferably, the second gear has a coaxial fixed bevel gear structure and a cylindrical gear structure, or the second gear has a coaxial fixed worm gear structure and a cylindrical gear structure. The first gear corresponds to a bevel gear or a worm that meshes with the bevel gear structure or the worm gear structure of the second gear; the third gear has a coaxial fixed first cylindrical gear structure and a second cylindrical gear structure. A sector gear structure is provided on the push-pull bracket, and the sector gear structure meshes with one side of the first cylindrical gear structure of the third gear facing away from the second gear. The second cylindrical gear structure of the third gear is in transmission connection with the cylindrical gear structure of the second gear.

[0010] Preferably, the manual shaver for minimally invasive surgery of the present invention further includes a fourth gear located between the second gear and the third gear. The fourth gear is rotatably assembled in the handle. The fourth gear has a coaxial fixed first cylindrical gear structure and a second cylindrical gear structure. The first cylindrical gear structure of the fourth gear meshes with the second cylindrical gear structure of the third gear, and the second cylindrical gear structure of the fourth gear meshes with the cylindrical gear structure of the second gear.

[0011] Preferably, in the third gear, the diameter of the first cylindrical gear structure is smaller than the diameter of the second cylindrical gear structure; in the fourth gear, the diameter of the first cylindrical gear structure is smaller than the diameter of the second cylindrical gear structure.

[0012] Preferably, the manual shaver for minimally invasive surgery of the present invention further includes an elastic member disposed between the handle and the handgrip, and the elastic member is configured to drive the handle together with the push-pull bracket to move away from the handgrip.

[0013] Preferably, an avoidance groove for avoiding the push-pull bracket is formed on the handle, and a pivot structure is further provided on the handle and placed in the avoidance groove. The notch of the avoidance groove is arranged facing the handgrip. The push-pull bracket is partially placed in the avoidance groove and sleeved and connected with the pivot structure, and the second pivot center line is located at the center of the pivot structure.

[0014] Preferably, a resisting structure opposite to the notch of the avoidance groove is provided on the handgrip. One end of the elastic member abuts against the resisting structure, and the other end of the elastic member extends into the avoidance groove and abuts against the groove wall of the avoidance groove.

[0015] Preferably, the handgrip and the handle are each arranged to extend along the length direction of the outer cutter tube, and the handgrip is also arranged to be inclined and open relative to the handle in the initial position.

[0016] Preferably, an outer cutting window is formed on the side wall of the head end of the outer cutter tube, and a plurality of outer cutter sawteeth arranged in a common annular shape are formed on the edge of the outer cutting window; an inner cutting window exposed by the outer cutting window is formed on the side wall of the head end of the inner cutter tube, the inner cutting windows are multiple and arranged at intervals in the circumferential direction of the inner cutter tube, and a plurality of inner cutter sawteeth arranged in a common annular shape are provided on the edge of each inner cutting window.

[0017] Preferably, the head end end face of the inner cutter tube is a spherical crown. Description of the Drawings

[0018] Figure 1 is a perspective view of the manual shaver for minimally invasive surgery of the present invention.

[0019] Figure 2 is Figure 1 a perspective exploded view of the manual shaver for minimally invasive surgery shown after the first housing and the second housing of the handgrip are separated.

[0020] Figure 3 is Figure 2 an enlarged view of part B in

[0021] Figure 4 is Figure 2 an enlarged view of part C in

[0022] Figure 5 is Figure 2The plan view of the manual shaver for minimally invasive surgery after hiding the first housing.

[0023] Figure 6 is Figure 5 The enlarged view of part D in

[0024] Figure 7 is Figure 2 The three - dimensional view of the manual shaver for minimally invasive surgery after hiding the first housing and at another angle.

[0025] Figure 8 is Figure 7 The three - dimensional exploded view of

[0026] Figure 9 is Figure 8 The enlarged view of part E in

[0027] Figure 10 The three - dimensional exploded view of the manual shaver for minimally invasive surgery of the present invention with the first gear moved away from the adsorption pipeline and the inner cutter tube.

[0028] Figure 11 is the three - dimensional view of the outer cutter tube in the manual shaver for minimally invasive surgery of the present invention.

[0029] Figure 12 is Figure 11 The enlarged view of part F in

[0030] Figure 13 is the three - dimensional view of the inner cutter tube in the manual shaver for minimally invasive surgery of the present invention.

[0031] Figure 14 is Figure 13 The enlarged view of part G in Detailed implementation manners

[0032] Next, in combination with specific implementation examples and the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described, and the technical solutions of the present invention will be elaborated. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. The following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below. Now, the embodiments of the present invention will be described with reference to the accompanying drawings, and like reference numerals in the drawings represent like elements.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] Please refer to Figures 1 to 3 , the manual shaver 100 for minimally invasive surgery of the present invention includes a handle 10, a suction pipeline 20, an outer cutter tube 30, an inner cutter tube 40, a handle 50, a push-pull bracket 60, a first gear 71, a second gear 72 and a third gear 73.

[0035] Among them, the tail end 31 of the outer cutter tube 30 is assembled on the handle 10, and the handle 10 provides a supporting function for the outer cutter tube 30. Optionally, in Figure 2 , Figure 3 , Figure 5 and Figure 6 , as an example, the tail end 31 of the outer cutter tube 30 also extends into the handle 10 to meet the need for the tail end 31 of the outer cutter tube 30 to be assembled in the handle 10; obviously, according to actual needs, the tail end 31 of the outer cutter tube 30 can also be welded and fixed to the head end face 13 of the handle 10, so it is not limited to Figure 2 , Figure 3 , Figure 5 and Figure 6 shown.

[0036] The inner cutter tube 40 is located inside the outer cutter tube 30, and the tail end 41 of the inner cutter tube 40 also extends out of the tail end 31 of the outer cutter tube 30 to facilitate the assembly and connection of the first gear 71 with the tail end 41 of the inner cutter tube 40; optionally, in combination with Figure 9 and Figure 10 , as an example, the middle part of the first gear 71 has a through channel 712, and the head end of the through channel 712 is in sealed and butt-connected communication with the tail end 41 of the inner cutter tube 40. For example, the first gear 71 and the tail end 41 of the inner cutter tube 40 can be end-welded to achieve the purpose of sealed cooperation. Compared with the way of sleeving and fixing the first gear 71 on the tail end 41 of the inner cutter tube 40, the end-welding and fixing method enables the diameter of the first gear 71 to be made smaller.

[0037] The adsorption pipeline 20 is arranged in the handle 10 and extends in a straight line. An external suction joint 21 exposed from the tail end 12 of the handle 10 is provided at the tail end of the adsorption pipeline 20 to facilitate the connection operation between the adsorption pipeline 20 and an external suction device. The adsorption pipeline 20 is also in sealed butt connection with the tail end opposite to the through channel 712 to prevent the risk of leakage at the joint between the adsorption pipeline 20 and the first gear 71. Optionally, as an example, an end face sealing method is adopted between the adsorption pipeline 20 and the first gear 71 to better meet the sealing cooperation requirement between the rotating first gear 71 and the stationary adsorption pipeline 20 when the adsorption pipeline 20 and the handle 10 are in a static state.

[0038] Combined with Figure 9 , the second gear 72 and the third gear 73 are each rotatably assembled in the handle 10, and the handle 10 provides support and concealment for the second gear 72 and the third gear 73. The second gear 72 is respectively in transmission connection with the first gear 71 and the third gear 73. Additionally, combined with Figure 10 , the handle 50 is pivotally connected to the handle 10 around a first pivot center line 51 to meet the requirement that the handle 50 can pivot relative to the handle 10. And the first pivot center line 51 and the center line 711 of the first gear 71 are arranged in different planes to better meet the requirement that the handle 10 and the handle 50 each extend along the length direction of the outer cutter tube 30 (see the directions indicated by the arrow A and the opposite direction), and also meet the requirement that the handle 50 is in an inclined open arrangement relative to the handle 10 at the initial position (visible Figure 5 ), providing more sufficient space for the handle 50 to pivot closer to the handle 10, thus facilitating the operator to perform the opening or closing operation between the handle 50 and the handle 10 with one hand, and thus improving the convenience of single-handed operation.

[0039] The push-pull bracket 60 is pivotally connected to the handle 50 at a position away from the first pivot center line 51 around a second pivot center line 61. The position of the push-pull bracket 60 away from the second pivot center line 61 is also in transmission connection with the third gear 73. Additionally, the second pivot center line 61, the first pivot center line 51, the center line 721 of the second gear 72, and the center line 731 of the third gear 73 are parallel to each other, as shown in Figure 9 .

[0040] Therefore, during the process of the handle 50 reciprocally pivoting around the first pivot center line 51, the reciprocally pivoting handle 50 drives the inner cutter tube 40 to rotate forward and backward relative to the outer cutter tube 30 through the push-pull bracket 60, the third gear 73, the second gear 72, and the first gear 71 to meet the purpose of planing and cutting the target with the cooperation of the inner cutter tube 40 and the outer cutter tube 30. More specifically, as follows:

[0041] As Figures 2 to 3 , and Figures 5 to 9As shown, as an example, the second gear 72 has a coaxial fixed bevel gear structure 72a and a cylindrical gear structure 72b, and the first gear 71 correspondingly is a bevel gear meshing with the bevel gear structure 72a of the second gear 72; the third gear 73 has a coaxial fixed first cylindrical gear structure 73a and a second cylindrical gear structure 73b; a sector gear structure 62 is provided on the push-pull bracket 60, and the sector gear structure 62 meshes with one side of the first cylindrical gear structure 73a of the third gear 73 facing away from the second gear 72; the second cylindrical gear structure 73b of the third gear 73 is in transmission connection with the cylindrical gear structure 72b of the second gear 72; therefore, by means of the sector gear structure 62, during the process of the handle 50 driving the push-pull bracket 60 to push and pull, the push-pull bracket 60 drives the third gear 73 to rotate, and then the rotating third gear 73 drives the first gear 71 and the inner cutter tube 40 to rotate together through the second gear 72, so as to control the inner cutter tube 40 to perform precise forward and reverse rotation. Specifically, in Figures 2 to 2 , and Figures 5 to 9 , as an example, the manual shaver 100 for minimally invasive surgery of the present invention further includes a fourth gear 74 located between the second gear 72 and the third gear 73. The fourth gear 74 is rotatably assembled in the handle 10. The fourth gear 74 has a coaxial fixed first cylindrical gear structure 74a and a second cylindrical gear structure 74b. The first cylindrical gear structure 74a of the fourth gear 74 meshes with the second cylindrical gear structure 73b of the third gear 73, and the second cylindrical gear structure 74b of the fourth gear 74 meshes with the cylindrical gear structure 72b of the second gear 72; in addition, the wheel diameter of the first cylindrical gear structure 73a of the third gear 73 is smaller than the wheel diameter of the second cylindrical gear structure 73b of the third gear 73, and the wheel diameter of the first cylindrical gear structure 74a of the fourth gear 74 is smaller than the wheel diameter of the second cylindrical gear structure 74b of the fourth gear 74; so as to achieve a high transmission ratio, so that the handle 50 can drive the inner cutter tube 40 to perform high-speed rotation during a slow pivoting process. It should be noted that although the attached drawing shows that the first gear 71 is a bevel gear, obviously, according to actual needs, the first gear 71 can also be a worm. Correspondingly, the second gear 72 then has a coaxial fixed worm gear structure and a cylindrical gear structure 72b, so it is not limited to the attached drawing; in addition, although the attached drawing shows that the push-pull bracket 60 meshes and drives with the second cylindrical gear structure 73b of the third gear 73 through the sector gear structure 62, obviously, according to actual needs, the third gear 73 can also only retain the second cylindrical gear structure 73b, and then the push-pull bracket 60 is pivotally connected to the end face 732 of the second cylindrical gear structure 73b of the third gear 73, so that the handle 50, the push-pull bracket 60, the handle 10 and the third gear 73 together form a double rocker mechanism, which can also achieve the purpose of driving the inner cutter tube 40 to perform forward and reverse rotation by the handle 50. Therefore, the transmission connection between the push-pull bracket 60 and the third gear 73 is not limited to the attached drawing.

[0042] AsFigures 5 to 9 As shown, as an example, the manual shaver 100 for minimally invasive surgery of the present invention further includes an elastic member 80 disposed between the handle 50 and the handle 10. The elastic member 80 is configured to drive the handle 50 together with the push-pull bracket 60 to move away from the handle 10, and automatically reset the handle 50 to Figure 5 the initial position shown to provide an automatic reset elastic force, further improving the convenience of single-handed operation by the operator. Specifically, in Figures 7 to 9 , as an example, an avoidance groove 52 for avoiding the push-pull bracket 60 is formed on the handle 50. The notch 521 of the avoidance groove 52 is arranged facing the handle 10; a pivot structure 53 is further provided on the handle 50 and placed in the avoidance groove 52; the push-pull bracket 60 is partially placed in the avoidance groove 52 and sleeved and connected with the pivot structure 53; at this time, the second pivot center line 61 is located at the center of the pivot structure 53; therefore, by means of the avoidance groove 52, the push-pull bracket 60 is arranged between the handle 50 and the handle 10 on the facing side, preventing the risk of pinching hands during the movement of the push-pull bracket 60 following the handle 50. In addition, in combination with Figure 7 and Figure 9 , as an example, a resisting structure 11 opposite to the notch 521 of the avoidance groove 52 is provided on the handle 10. One end of the elastic member 80 abuts against the resisting structure 11, and the other end of the elastic member 80 extends into the avoidance groove 52 and abuts against the groove wall 522 of the avoidance groove 52, as shown in Figure 9 ; this simplifies the assembly relationship between the elastic member 80 and the handle 10 and the handle 50, and also prevents the risk of pinching hands during the movement of the elastic member 80 following the handle 50.

[0043] In combination with Figure 4 , Figure 11 , Figure 12 , Figure 13 and Figure 14 , as an example, an outer cutting window 34 is formed on the side wall 33 of the head end 32 of the outer cutter tube 30, and a plurality of outer cutter saw teeth 35 arranged in a common ring are formed on the edge of the outer cutting window 34; an inner cutting window 44 exposed by the outer cutting window 34 is formed on the side wall 43 of the head end 42 of the inner cutter tube 40. The inner cutting windows 44 are multiple and arranged at intervals in the circumferential direction of the inner cutter tube 40. A plurality of inner cutter saw teeth 45 arranged in a common ring are provided on the edge of each inner cutting window 44; so as to meet the need for the inner cutter tube 40 to perform shaving and cutting on the target in cooperation with the outer cutter tube 30, and also meet the need for the waste removed to be sucked away along the inner cutter tube 40; in addition, the head end end face 46 of the inner cutter tube 40 is a spherical crown, and such a design can avoid the defect of insufficient strength of the head end 42 of the inner cutter tube 40 due to the opening of the inner cutting window 44.

[0044] In conjunction with the accompanying drawings, the working principle of the manual shaver for minimally invasive surgery of the present invention will be described. During use, an operator can simultaneously grasp the handle 50 and the handle 10 with one hand. Then, force is applied to make the handle 50 pivot towards the handle 10 around the first pivot center line 51. The pivoting handle 50 drives the third gear 73 to rotate through the push-pull bracket 60. The rotating third gear 73 drives the inner cutter tube 40 to rotate forward relative to the outer cutter tube 30 in sequence through the fourth gear 74, the second gear 72, and the first gear 71. And the elastic member 80 is compressed and deformed during the process of the handle 50 pivoting towards the handle 10.

[0045] When the handle 50 approaches the limit position relative to the handle 10, the operator releases the force applied to the handle 50. The compressed and deformed elastic member 80 drives the handle 50 to pivot away from the handle 10. The pivoting handle 50 drives the inner cutter tube 40 to rotate reversely relative to the outer cutter tube 30 in sequence through the push-pull bracket 60, the third gear 73, the fourth gear 74, the second gear 72, and the first gear 71.

[0046] Therefore, through the reciprocating pivoting of the handle 50 relative to the handle 10, the purpose of the forward and reverse rotation of the inner cutter tube 40 relative to the outer cutter tube 30 can be achieved.

[0047] Compared with the prior art, by virtue of the design that "the first pivot center line 51 around which the handle 50 pivots is arranged in a skew plane with the center line 711 of the first gear 71, and the second pivot center line 61, the first pivot center line 51, the center line 721 of the second gear 72, and the center line 731 of the third gear 73 are parallel to each other", an operator can apply force to make the handle 50 reciprocally pivot around the first pivot center line 51 while grasping the handle 10 and the handle 50 with one hand. The reciprocating pivoting handle 50 can drive the inner cutter tube 40 to rotate forward and reverse relative to the outer cutter tube 30 through the push-pull bracket 60, the third gear 73, the second gear 72, and the first gear 71, eliminating the motor, the device for supplying power to the motor and controlling the forward and reverse rotation, and the wiring operation between the motor and the device, correspondingly reducing the cost and simplifying the operation steps. Also, since the handle 50 drives the inner cutter tube 40 to rotate relative to the outer cutter tube 30 through the push-pull bracket 60, the third gear 73, the second gear 72, and the first gear 71, the stability is better and the transmission accuracy is higher.

[0048] It should be noted that although the accompanying drawings show that a fourth gear 74 is additionally provided between the third gear 73 and the second gear 72 to achieve the indirect transmission connection between the third gear 73 and the second gear 72; obviously, according to actual needs, the third gear 73 and the second gear 72 can also be directly connected for transmission, that is, at this time, the third gear 73 and the second gear 72 are directly meshed for transmission, so it is not limited to the illustration in the accompanying drawings.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved. At the same time, the above-disclosed are only the preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A manual shaver for minimally invasive surgery, comprising a handle, an outer blade tube whose tail end is mounted on the handle, and an inner blade tube located inside the outer blade tube, wherein the tail end of the inner blade tube extends out of the tail end of the outer blade tube, characterized in that: The manual planer for minimally invasive surgery also includes a handle, a push-pull bracket, a first gear assembled and connected to the tail end of the inner knife tube, and a second gear and a third gear rotatably assembled in the handle, the second gear being respectively connected to the first gear and the third gear in transmission, the handle is pivoted to the handle around a first pivot center line, the first pivot center line and the wheel center line of the first gear are arranged in different planes, the push-pull bracket is pivoted to a position of the handle away from the first pivot center line around a second pivot center line, the push-pull bracket is also connected to the third gear in transmission at a position away from the second pivot center line, the second pivot center line, the first pivot center line, the wheel center line of the second gear and the wheel center line of the third gear are parallel to each other; wherein, in the process of reciprocating pivoting around the first pivot center line, the handle drives the inner knife tube to rotate forward and reverse relative to the outer knife tube through the push-pull bracket, the third gear, the second gear and the first gear.

2. The manual shaver for minimally invasive surgery according to claim 1, characterized in that: It also includes an adsorption pipeline arranged in the handle, the adsorption pipeline is arranged in a straight line, and the tail end of the adsorption pipeline is provided with an external suction connector exposed from the tail end of the handle; the middle part of the first gear has a through channel, the head end of the through channel is connected to the tail end of the inner knife tube in a sealed butt joint, and the opposite tail end of the through channel is connected to the adsorption pipeline in a sealed butt joint.

3. The manual shaver for minimally invasive surgery according to claim 1, characterized in that: The second gear has a coaxially fixed bevel gear structure and a cylindrical gear structure, or the second gear has a coaxially fixed worm gear structure and a cylindrical gear structure; the first gear corresponds to a bevel gear or a worm gear meshed with the bevel gear structure or the worm gear structure of the second gear; the third gear has a coaxially fixed first cylindrical gear structure and a second cylindrical gear structure, the push-pull bracket is provided with a fan tooth structure, the fan tooth structure is meshed with a side of the first cylindrical gear structure facing away from the second gear, and the second cylindrical gear structure of the third gear is transmission connected with the cylindrical gear structure of the second gear.

4. The manual shaver for minimally invasive surgery according to claim 3, characterized in that: It also includes a fourth gear located between the second gear and the third gear, the fourth gear being rotatably assembled in the handle, the fourth gear having a first cylindrical gear structure and a second cylindrical gear structure coaxially fixed, the first cylindrical gear structure of the fourth gear being meshed with the second cylindrical gear structure of the third gear, and the second cylindrical gear structure of the fourth gear being meshed with the cylindrical gear structure of the second gear.

5. The manual shaver for minimally invasive surgery according to claim 4, characterized in that: In the third gear, the wheel diameter of the first cylindrical gear structure is smaller than the wheel diameter of the second cylindrical gear structure; in the fourth gear, the wheel diameter of the first cylindrical gear structure is smaller than the wheel diameter of the second cylindrical gear structure.

6. The manual shaver for minimally invasive surgery according to claim 1, characterized in that: It also includes an elastic member disposed between the handle and the grip, wherein the elastic member is configured to drive the handle together with the push-pull bracket to move away from the handle.

7. The manual shaver for minimally invasive surgery according to claim 6, characterized in that: The handle is provided with an avoidance groove for avoiding the push-pull bracket, and the handle is also provided with a pivot structure placed in the avoidance groove. The notch of the avoidance groove is arranged facing the handle, the push-pull bracket is partially placed in the avoidance groove and is connected to the pivot structure in a sleeve, and the second pivot center line is located at the center of the pivot structure.

8. The manual shaver for minimally invasive surgery according to claim 7, characterized in that: The handle is provided with a resisting structure opposite to the notch of the avoidance groove, one end of the elastic member abuts against the resisting structure, and the other end of the elastic member extends into the avoidance groove and abuts against the groove wall of the avoidance groove.

9. The manual shaver for minimally invasive surgery according to claim 1, characterized in that: The handle and the grip are each arranged to extend along the length direction of the outer knife tube, and the handle is arranged to be inclined and open relative to the handle in the initial position.

10. The manual shaver for minimally invasive surgery according to claim 1, characterized in that: An outer cutting window is provided on the side wall of the head end of the outer knife tube, and a plurality of outer knife saw teeth arranged in a ring are formed on the edge of the outer cutting window; an inner cutting window exposed by the outer cutting window is provided on the side wall of the head end of the inner knife tube, and the inner cutting windows are a plurality of inner cutting windows arranged spaced apart in the circumferential direction of the inner knife tube, and a plurality of inner knife saw teeth arranged in a ring are provided on the edge of each inner cutting window; the end face of the head end of the inner knife tube is a spherical crown.

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