CN116269657A - Retroperitoneal fat removal device - Google Patents

Abstract

The present invention relates to the field of medical devices. The retroperitoneal fat removing device comprises a cutting knife which is of a hollow tubular structure; the cutting device also comprises a shell, wherein the shell is rotationally connected with the cutting knife, a knife sheath is arranged at one end of the shell, the cutting knife is rotationally arranged in the knife sheath, and the cutting edge of the cutting knife can extend out of the knife sheath; the other end of the shell is provided with a negative pressure joint which is in butt joint and conduction with the inner cavity of the hollow tubular structure; the cutting knife is characterized by further comprising a driving piece capable of linearly and reciprocally moving, the driving piece is in sliding connection with the shell, the driving piece is in transmission connection with the cutting knife, and the driving piece drives the cutting knife to rotate by taking the central axis of the hollow tubular structure as a rotation central line. The device only needs to extend the knife sheath and the cutting knife into the operation incision, and can cut the fat in the incision and then suck and take out the fat under negative pressure. The incision is not required to be prolonged, and the fat is extracted in a minimally invasive way. The abdominal cavity gap is quickly and safely established, the operation time is shortened, and various risks of patients are reduced.

Description

Retroperitoneal fat removal equipment

technical field

The invention relates to the field of medical devices, in particular to fat removal equipment.

Background technique

Renal cancer is a common malignant tumor in urology, and its incidence rate accounts for 2%-3% of adult malignant tumors. Although the incidence of renal cancer is lower than that of bladder cancer and prostate cancer, renal cancer is indeed the malignant tumor with the highest mortality rate in the urinary system. Surgical operation is the preferred treatment for localized renal cell carcinoma. There are two surgical approaches for renal cell carcinoma: transabdominal and retroperitoneal (translumbar). Among them, the retroperitoneal approach has the advantages of less damage, convenient arterial search during operation, less impact on the recovery of gastrointestinal function, patients can eat early, and recover quickly after surgery. However, the retroperitoneal space is relatively small, and the retroperitoneal fat needs to be removed in order to have a better operating space for operation.

At present, the method of removing retroperitoneal fat during operation is mainly to divide the fat into small pieces or extend the incision to remove the retroperitoneal fat. The block removal method is time-consuming and laborious, and the method of extending the incision to remove the retroperitoneal fat has caused unnecessary damage to the patient, and is prone to wound pain and delayed healing.

In view of this, how to quickly remove retroperitoneal fat is a major problem that needs to be solved urgently. At present, there is a lack of a device that can achieve minimal invasiveness and quickly and conveniently create a better retroperitoneal cavity.

Contents of the invention

In view of the problems existing in the prior art, the present invention provides retroperitoneal fat removal equipment to solve at least one of the above technical problems.

In order to achieve the above object, the present invention provides retroperitoneal fat removal equipment, which is characterized in that it includes a cutting knife, and the cutting knife is a hollow tubular structure;

It also includes a housing, the housing is rotatably connected with the cutting knife, a knife sheath is installed at one end of the housing, the cutting knife is rotatably arranged in the knife sheath, and the cutting knife is The cutting edge can protrude from the knife sheath;

The other end of the housing is equipped with a negative pressure joint, and the negative pressure joint is connected to the inner cavity of the hollow tubular structure;

It also includes a driving part capable of linear reciprocating movement, the driving part is slidably connected with the housing, and the driving part is in transmission connection with the cutting knife, and the driving part drives the cutting knife through the hollow tubular structure The central axis is the rotation centerline rotation.

The device only needs to insert the knife sheath and the cutting knife into the surgical incision, and then the fat in the incision can be cut and taken out by negative pressure suction. Minimally invasive fat removal without extending the incision. Quickly and safely establish the retro-abdominal cavity, shorten the operation time, and reduce the risks of patients.

Further preferably, the end of the housing is provided with a connecting portion that is threadedly connected to the knife sheath, and the connecting portion is provided with three positioning holes, and the internal threads of the positioning holes are connected with wave ball screws. The end of the ball screw is provided with a ball, and the ball extends out of the outer side of the connecting part;

The connecting part is provided with an external thread, the knife sheath is provided with an internal thread matching the external thread, and the knife sheath is provided with a limit groove embedded with the ball, and the limit groove is in the shape of Spherical;

The outer side of the housing is provided with a positioning marking structure for marking the position of the ball screw;

A positioning member is provided on the outside of the knife sheath, and the positioning member is located on the periphery of the limiting groove.

It is convenient to intuitively know the relative rotation angle between the knife sheath and the housing, and adjust the exposed depth of the cutting knife.

As a preferred solution, the housing includes a gripping part, the driving part is slidably installed on the gripping part, and the driving part is partially exposed from the gripping part, and the driving part is connected to the gripping part through a return spring. the gripping parts are connected;

The moving direction of the driving member is parallel to the direction of the rotation center line of the cutting knife;

A driving gear is rotatably connected in the housing, and a driven gear meshing with the driving gear is installed on the outer wall of the cutting knife;

The bottom of the driving gear is provided with a cam structure, the cam structure includes a large head and a small head, the outer diameter of the big head is larger than the outer diameter of the small head, the central axis of the big head Coincident with the central axis of the drive gear;

A transmission rod is longitudinally slidably connected to the driving gear, and the central axis of the transmission rod coincides with the central axis of the small head;

The driving member is provided with a guide groove slidingly connected with the transmission rod, and the guide groove includes a front limiting part, a guiding part and a rear limiting part connected in sequence, and the guiding part is inclined to the left from front to back Or tilt to the right.

It is convenient to drive the rotation of the cutting knife through the movement of the driving part.

Further preferably, the distance between the centers of the front limiting portion and the rear limiting portion is equal to twice the distance from the center of the small head to the center of the large head.

It is convenient to realize the unidirectional rotary motion of the cutting knife through the reciprocating movement of the driving member.

As another preferred solution, the driving member is a push-pull ring, and the moving direction of the driving member is perpendicular to the rotation centerline direction of the cutting knife;

A spur rack is provided on the drive member;

A driven gear connected with the spur rack is provided on the outer wall of the cutting knife.

Facilitates the rotary drive of the cutter.

Further preferably, a transmission gear is rotatably connected to the housing through a bearing, and the transmission gear includes a first meshing portion meshing with the driven gear and a second meshing portion meshing with the spur rack.

The number of teeth of the driven gear is smaller than the number of teeth of the first meshing portion and greater than the number of teeth of the second meshing portion;

The outer diameter of the driven gear is smaller than the outer diameter of the first meshing portion and larger than the outer diameter of the second meshing portion.

In terms of transmission, a transmission gear is added between the spur rack and the driven gear to increase the movement speed of the inner tube so as to cut fat more quickly.

Further preferably, an extension is provided at the end of the knife sheath, the extension exceeds the cutting knife, and the extension partially covers the cutting knife. When cutting fat, the extension inserts into the fat to immobilize the fat.

Further preferably, one end of the driving member is exposed from the housing, and a return spring is installed between the other end of the driving member and the housing;

A locking mechanism for locking the cutting knife is installed in the housing;

The locking mechanism includes a limit screw, and the end of the driving member adjacent to the return spring is installed with the limit screw;

The locking mechanism also includes a spoon-shaped hook, which is rotatably installed in the housing through a rotating shaft. The spoon-shaped hook includes sequentially connected arc parts and inclined guide parts. The inclined guide part is provided with a through hole passing through the rotating shaft;

The rotating shaft is located on the side of the casing where the cutting knife is adjacent to the drive member and exposed;

When the driving part resets under the action of the spring force, the limit screw moves against the inclined guide part, drives the spoon-shaped support to resist the cutting knife, and realizes the rotation stop of the cutting knife.

Since the limit screw is installed on the driving part, when the driving part resets under the action of the spring force, the limit screw will slowly move on the inclined guide part, driving the spoon-shaped hook to turn over, and when it is back in place, it will hold against the cutting knife, The cutting knife stops rotating.

Further preferably, a one-way bearing is sheathed on the periphery of the cutting knife, and the driven gear is sheathed on the periphery of the one-way bearing.

One-way rotation of the cutting knife is realized.

Further preferably, the cutting knife is sleeved with a sleeve buckle adjacent to the negative pressure joint, and the sleeve buckle is provided with an elastic buckle for limiting the sleeve;

The outer wall of the shaft sleeve is provided with an annular groove, and a sealing ring is embedded in the annular groove, and the sealing ring is clamped between the housing and the shaft sleeve.

It is convenient to improve the sealing effect.

Description of drawings

Fig. 1 is a kind of structural representation of specific embodiment 1 of the present invention;

Fig. 2 is the local structure schematic diagram of specific embodiment 1 of the present invention;

Fig. 3 is the local structure schematic diagram of the specific embodiment 1 of the present invention;

Fig. 4 is the structural representation of the driving gear of specific embodiment 1 of the present invention;

Fig. 5 is a structural schematic diagram of the driving member of the specific embodiment 1 of the present invention;

Fig. 6 is a kind of structural representation of specific embodiment 2 of the present invention;

Figure 7 is an exploded exploded view of Embodiment 2 of the present invention;

Fig. 8 is a schematic structural view of a wave bead screw according to Embodiment 2 of the present invention;

Fig. 9 is a partial structural schematic diagram of a specific embodiment 2 of the present invention;

Fig. 10 is a partial structural schematic diagram of Embodiment 2 of the present invention;

Fig. 11 is a schematic structural view of the second bushing buckle in Embodiment 2 of the present invention;

Fig. 12 is a partial structural schematic diagram of Embodiment 2 of the present invention;

Fig. 13 is a schematic structural view of a specific embodiment 3 of the present invention;

Fig. 14 is a partial structural schematic diagram of a specific embodiment 3 of the present invention;

Fig. 15 is a partial structural schematic diagram of a specific embodiment 3 of the present invention;

Fig. 16 is a partial structural schematic diagram of a specific embodiment 3 of the present invention;

Fig. 17 is a schematic structural view of the extension part of the specific embodiment 3 of the present invention;

Fig. 18 is a partial structural schematic diagram of Embodiment 4 of the present invention;

Fig. 19 is a partial structural schematic diagram of Embodiment 4 of the present invention.

Among them: 1 is the cutting knife, 2 is the knife sheath, 3 is the shell, 4 is the driving part, 5 is the driving gear, 6 is the driven gear, 8 is the cam structure, 9 is the transmission rod, 10 is the ball screw, 11 is the first shaft sleeve buckle, 12 is the second shaft sleeve buckle, 13 is the H shaft sleeve, 14 is the sealing ring, 15 is the transmission gear, 16 is the one-way bearing, 17 is the return spring, 18 is the limit screw, 19 It is a spoon-shaped bracket hook, 20 is an extension, and 21 is a bushing buckle.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1 to Fig. 5, specific embodiment 1, retroperitoneal fat removal equipment, comprises cutting knife 1, and cutting knife 1 is hollow tubular structure; One end of the housing is equipped with a knife sheath 2, the cutting knife 1 is rotatably arranged in the knife sheath 2, and the cutting edge of the cutting knife 1 can extend out of the knife sheath 2; the other end of the housing 3 is equipped with a negative pressure joint, the negative pressure The crimping head is connected to the inner cavity of the hollow tubular structure; it also includes a linearly reciprocating driving part 4, which is slidingly connected to the housing 3, and the driving part 4 is in transmission connection with the cutting knife 1, and the driving part 4 drives the cutting The knife 1 rotates with the center axis of the hollow tubular structure as the center line of rotation. The device only needs to insert the knife sheath 2 and the cutting knife 1 into the surgical incision, and then the fat in the incision can be cut and taken out by negative pressure suction. Minimally invasive fat removal without extending the incision. Quickly and safely establish the retro-abdominal cavity, shorten the operation time, and reduce the risks of patients. The negative pressure joint is connected with the negative pressure suction device through the suction tube.

The housing 3 includes a grip, the driver 4 is slidably mounted on the grip, and the driver 4 is partially exposed from the grip, and the driver 4 is connected to the grip through a return spring 17; the direction of movement of the driver 4 is parallel to The direction of the center line of rotation of the cutting knife 1; the housing 3 is connected with a driving gear 5 for rotation, and the outer wall of the cutting knife 1 is equipped with a driven gear 6 meshing with the driving gear 5; the bottom of the driving gear 5 is provided with a cam structure 8, The cam structure 8 includes a large head and a small head. The outer diameter of the big head is greater than that of the small head. The central axis of the large head coincides with the central axis of the driving gear 5; the driving gear 5 is longitudinally slidably connected with a transmission Rod 9, the central axis of the transmission rod 9 coincides with the central axis of the small head; the driving member 4 is provided with a guide groove that is slidably connected with the transmission rod 9, and the guide groove includes a front limiter, a guide part and a rear limiter that are sequentially connected. The guide part is tilted to the left or tilted to the right from front to back. It is convenient to drive the rotation of the cutting knife 1 through the movement of the driving member 4 . The distance between the centers of the front limiting part and the rear limiting part is equal to twice the distance from the center of the small head to the center of the big head. It is convenient to realize the unidirectional rotary motion of the cutting knife through the reciprocating movement of the driving member 4 .

The cross section of the transmission rod is circular.

A knife sheath 2 is installed on the front end of the housing 3 .

The guide groove is inclined to the right from back to front;

When the driving part is in the initial state, the transmission rod is located at the rear limit part of the guide groove, and the small head of the cam structure faces left;

Press the driving part, the driving part moves backward, the cam structure rotates 180° (the small head rotates backward from left to right and then rotates forward), and the driving part moves back to the limit position;

When the driving part retreats to the limit position, the transmission rod is located at the front limit part of the outlet groove, and the small head of the cam structure faces to the right;

Unclamp the driving part, the driving part moves forward under the active force of the back-moving spring, the cam structure rotates 180 ° (the small head rotates forward from right to left and then rotates backward), and the driving part moves forward to the initial state.

In this specific embodiment, the use of the grasping portion can conveniently control the rotation of the cutting knife and adjust the direction and position during the operation. In this specific embodiment, the unidirectional rotation of the driven gear is realized through the reciprocating motion of the driving member 4 , and thus the unidirectional rotation of the cutting knife is realized.

Referring to Fig. 6 to Fig. 12, the specific embodiment 2, retroperitoneal fat removal equipment, includes a cutting knife 1, and the cutting knife 1 is a hollow tubular structure; it also includes a housing 3, which is rotatably connected with the cutting knife 1, and the housing 3 One end of the housing is equipped with a knife sheath 2, the cutting knife 1 is rotatably arranged in the knife sheath 2, and the cutting edge of the cutting knife 1 can extend out of the knife sheath 2; the other end of the housing 3 is equipped with a negative pressure joint, the negative pressure The crimping head is connected to the inner cavity of the hollow tubular structure; it also includes a linearly reciprocating driving part 4, which is slidingly connected to the housing 3, and the driving part 4 is in transmission connection with the cutting knife 1, and the driving part 4 drives the cutting The knife 1 rotates with the center axis of the hollow tubular structure as the center line of rotation. The device only needs to insert the knife sheath 2 and the cutting knife 1 into the surgical incision, and then the fat in the incision can be cut and taken out by negative pressure suction. Minimally invasive fat removal without extending the incision. Quickly and safely establish the retro-abdominal cavity, shorten the operation time, and reduce the risks of patients.

The end of the housing 3 is provided with a connecting portion that is threadedly connected to the knife sheath 2, and three positioning holes are provided on the connecting portion. The internal thread of the positioning hole is connected with a wave ball screw 10, and the end of the wave ball screw 10 is provided with a ball. The outer side of the connecting part is extended; the connecting part is provided with an external thread, the knife sheath 2 is provided with an internal thread matching the external thread, and the knife sheath 2 is provided with a limit groove embedded with balls, and the limit groove is spherical ; The outer side of the housing 3 is provided with a positioning marking structure for marking the position of the ball screw; the outer side of the knife sheath 2 is provided with an alignment member, and the alignment member is located on the periphery of the limit groove. It is convenient to know the relative rotation angle between the knife sheath 2 and the housing 3 intuitively, and adjust the exposed depth of the cutting knife 1 .

The driving part 4 is a push-pull ring, and the moving direction of the driving part 4 is perpendicular to the direction of the rotation center line of the cutting knife; the driving part 4 is provided with a spur rack; the outer wall of the cutting knife 1 is equipped with a driven gear meshed with a spur rack . The rotary drive of the cutting knife 1 is facilitated.

The cutting knife 1 is sheathed with a first bushing buckle 11 and a second bushing buckle 12 , and the first bushing buckle 11 is sheathed with a first bushing. The first shaft sleeve buckle is provided with an elastic buckle for limiting the first shaft sleeve and a position-limiting protrusion. The first shaft sleeve is located between the elastic buckle and the limiting protrusion. The second sleeve buckle 12 is sleeved with a second sleeve. The housing 3 is provided with a supporting groove for supporting the first bushing and the second bushing. The second shaft buckle is provided with a buckle that snaps into the second shaft sleeve and a driven gear that engages with the spur rack. Both the first bushing buckle 11 and the second bushing buckle 12 are connected with the cutter by interference fit.

The cutting knife 1 is sheathed with an H shaft sleeve 13 adjacent to the negative pressure joint, and the outer wall of the H shaft sleeve is embedded with a sealing ring 14 . Increase the tightness inside the liposuction unit.

The shell is provided with an arc-shaped convex part, and the arc-shaped convex part is provided with a chute slidingly connected to the straight rack, and the chute is fixed with a protrusion; one side of the straight rack is provided with a tooth-like structure, and the other side of the straight rack The side is provided with the guide groove of sliding connection protrusion, and the lower end of the guide groove is open. Facilitates the smoothness of longitudinal movement.

The method of use is that the palm faces the operator himself, and the index finger passes through the push-pull ring to hold the housing 3, and the push-pull ring is continuously pulled by the index finger to make the blade of the cutting knife 1 inside the whole body rotate back and forth to cut fat, and twisting the wrist can also continuously Adjust where to cut fat. The internal transmission is mainly driven by the push-pull ring and the gear meshing to drive the inner tube blade to rotate back and forth by pulling the pull ring.

The knife sheath 2 can protect the blade, and the cooperation of the knife sheath 2 and the housing 3 regulates the protruding length of the blade. When the ball of a glass bead screw among the three bead screws 10 is embedded in the limiting groove, the knife sheath 2 will not expose the cutter head of the cutting knife 1, and when the ball of a glass bead screw is embedded in the limiting groove, the cutting knife will not 1's cutter head exposed 1mm. It can cut relatively small fat depth and also cut relatively shallow. When the ball of a glass bead screw is inserted into the limit groove, the cutter head of the cutting knife 1 is exposed by 2mm. It can cut larger fat and deeper depth.

Referring to Fig. 13 to Fig. 17, specific embodiment 3, on the basis of specific embodiment 2, the difference is that the transmission structure of the cutting knife is as follows:

The driving part 4 is a push-pull ring, and the moving direction of the driving part 4 is perpendicular to the direction of the center line of rotation of the cutting knife; the driving part 4 is provided with a spur rack; gear 6. The rotary drive of the cutting knife 1 is facilitated. The housing 3 is rotatably connected with a transmission gear 15 through a bearing, and the transmission gear 15 includes a first meshing portion meshing with a driven gear and a second meshing portion meshing with a spur rack; the number of teeth of the driven gear is smaller than the number of teeth of the first meshing portion, And it is larger than the number of teeth of the second meshing part; the outer diameter of the driven gear is smaller than that of the first meshing part and larger than the outer diameter of the second meshing part. In terms of transmission, a transmission gear 15 is added between the spur rack and the driven gear to increase the movement speed of the inner tube so as to cut fat more quickly.

The cutting knife is sleeved with a bushing buckle adjacent to the negative pressure joint, and the bushing buckle is provided with an elastic buckle for limiting the bushing; the outer wall of the bushing is provided with an annular groove, and a sealing ring is embedded in the annular groove. The sealing ring is clamped between the housing 3 and the shaft sleeve. It is convenient to improve the sealing effect.

The end of the knife sheath 2 is provided with an extension part 20, the extension part 20 exceeds the cutting knife, and the extension part 20 partially covers the cutting knife. When cutting fat, the extension part 20 can be inserted into the fat to fix the fat.

One end of the driver 4 is exposed from the housing 3 , and a return spring 17 is installed between the other end of the driver 4 and the housing 3 . The shell is provided with an arc-shaped convex part, and the arc-shaped convex part is provided with a chute slidingly connected to the straight rack, and the chute is fixed with a protrusion; one side of the straight rack is provided with a tooth-like structure, and the other side of the straight rack The side is provided with the guide groove of sliding connection protrusion, and the lower end of the guide groove is open. Facilitates the smoothness of longitudinal movement.

The cutting knife 1 is connected with the housing 3 through a bearing. It is convenient to realize the free rotation of the cutting knife 1. The bearing includes an inner ring, an outer ring and balls located between the inner ring and the outer ring, and the axial length of the inner ring is smaller than the axial strength of the outer ring. The casing 3 is provided with a limiting groove embedded in the outer ring of the bearing.

A driver 4 is slidably connected to the housing adjacent to the negative pressure joint. And the outer wall at the place where the housing is slidably connected to the driver 4 is arc-shaped and convex. Allows the palm to hold the liposuction device more comfortably and firmly.

In this specific embodiment 3, compared with specific embodiment 2, a spring is installed, which can save a lot of effort. In terms of transmission, a transmission gear 15 is added between the spur rack and the driven gear to increase the movement speed of the inner tube so as to cut fat more quickly.

Referring to Fig. 18 to Fig. 19, specific embodiment 4, on the basis of specific embodiment 2, the periphery of the cutting knife 1 is provided with a one-way bearing 16, and the periphery of the one-way bearing 16 is provided with the slave Moving gear 6. One-way rotation of the cutting knife 1 is realized. The cutter head of the cutting knife is located at the front end of the cutting knife. The cutting knife 1 is sequentially installed with a first shaft sleeve, a second shaft sleeve and a one-way bearing 16 from the side adjacent to the cutting head to the side away from the cutting head. The cutting knife 1 is rotatably arranged with the first shaft sleeve and the second shaft sleeve. The first shaft sleeve and the second shaft sleeve are clamped and fixed by the housing.

The casing 3 includes a first casing and a second casing arranged left and right, the first casing and the second casing are detachably connected, and the first casing and the second casing cooperate with each other to form a threaded installation part, and the threaded installation The external thread is arranged on the part, and the external thread is connected with the nut. Facilitate the combination of the first shell and the second shell. A locking mechanism for locking the cutting knife 1 is installed in the housing 3; the locking mechanism includes a limit screw 18, and the end of the driver 4 adjacent to the return spring 17 is installed with a limit screw 18; the locking mechanism also includes a spoon-shaped hook 19. The spoon-shaped hook 19 is rotatably installed in the housing 3 through the rotating shaft. The spoon-shaped hook 19 includes sequentially connected arc-shaped parts and inclined guide parts. The inclined guide part is provided with a through hole passing through the rotating shaft; the rotating shaft is located at The cutting knife 1 is adjacent to the driver 4 and exposes one side of the housing 3 . Because the limit screw 18 is installed on the driver 4, when the driver 4 resets under the action of the spring force, the limit screw 18 will slowly move on the inclined guide, driving the spoon-shaped hook 19 to turn over, and when it is back in place, Push against the cutting knife 1, and the cutting knife 1 stops rotating.

The shell is provided with an arc-shaped convex part, and the arc-shaped convex part is provided with a chute slidingly connected to the straight rack, and the chute is fixed with a protrusion; one side of the straight rack is provided with a tooth-like structure, and the other side of the straight rack The side is provided with the guide groove of sliding connection protrusion, and the lower end of the guide groove is open. Facilitates the smoothness of longitudinal movement.

The cutting knife is sleeved with a bushing buckle adjacent to the negative pressure joint, and the bushing buckle is provided with an elastic buckle for limiting the bushing; the outer wall of the bushing is provided with an annular groove, and a sealing ring is embedded in the annular groove. The sealing ring is clamped between the housing 3 and the shaft sleeve. It is convenient to improve the sealing effect.

The stop function is added, and a one-way bearing 16 is installed in the internal transmission. When the push-pull ring is used to drive the gear to rotate, because of the effect of the one-way bearing 16, the inner tube will not rotate left and right but will continue to rotate in one direction, stop function Making cutting knife 1 stop rotating.

The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (10)

1. The retroperitoneal fat removal equipment is characterized in that it comprises a cutting knife, and the cutting knife is a hollow tubular structure; It also includes a housing, the housing is rotatably connected with the cutting knife, a knife sheath is installed at one end of the housing, the cutting knife is rotatably arranged in the knife sheath, and the cutting knife is The cutting edge can protrude from the knife sheath; The other end of the housing is equipped with a negative pressure joint, and the negative pressure joint is connected to the inner cavity of the hollow tubular structure; It also includes a driving part capable of linear reciprocating movement, the driving part is slidably connected with the housing, and the driving part is in transmission connection with the cutting knife, and the driving part drives the cutting knife through the hollow tubular structure The central axis is the rotation centerline rotation. 2. The retroperitoneal fat removal device according to claim 1, characterized in that: the end of the housing is provided with a connecting portion that is threadedly connected to the knife sheath, and the connecting portion is provided with three positioning holes, The internal thread of the positioning hole is connected with a ball screw, and the end of the ball screw is provided with a ball, and the ball extends out of the outside of the connecting part; The connecting part is provided with an external thread, the knife sheath is provided with an internal thread matching the external thread, and the knife sheath is provided with a limit groove embedded with the ball, and the limit groove is in the shape of Spherical; The outer side of the housing is provided with a positioning marking structure for marking the position of the ball screw; A positioning member is provided on the outside of the knife sheath, and the positioning member is located on the periphery of the limiting groove. 3. The retroperitoneal fat removal device according to claim 1, characterized in that: the housing includes a grip, the driver is slidably mounted on the grip, and the driver is partially exposed. The gripping part, the driving member is connected to the gripping part through a return spring; The moving direction of the driving member is parallel to the direction of the rotation center line of the cutting knife; A driving gear is rotatably connected in the housing, and a driven gear meshing with the driving gear is installed on the outer wall of the cutting knife; The bottom of the driving gear is provided with a cam structure, the cam structure includes a large head and a small head, the outer diameter of the big head is larger than the outer diameter of the small head, the central axis of the big head Coincident with the central axis of the drive gear; A transmission rod is longitudinally slidably connected to the driving gear, and the central axis of the transmission rod coincides with the central axis of the small head; The driving member is provided with a guide groove slidingly connected with the transmission rod, and the guide groove includes a front limiting part, a guiding part and a rear limiting part connected in sequence, and the guiding part is inclined to the left from front to back Or tilt to the right. 4. The retroperitoneal fat removal device according to claim 1, characterized in that: the distance between the center of the front limiting part and the center of the rear limiting part is equal to the center of the small head to the center of the large head. 2 times the distance from the center of the head. 5. The retroperitoneal fat removal device according to claim 1, characterized in that: the driving member is a push-pull ring, and the moving direction of the driving member is perpendicular to the direction of the centerline of rotation of the cutting knife; A spur rack is provided on the drive member; A driven gear connected with the spur rack is provided on the outer wall of the cutting knife. 6. The retroperitoneal fat removal device according to claim 5, characterized in that: a transmission gear is rotatably connected to the housing through a bearing, and the transmission gear includes a first meshing part meshing with the driven gear and a meshing part. The second meshing portion of the spur rack. 7. The retroperitoneal fat removal device according to claim 1, characterized in that: the end of the knife sheath is provided with an extension, the extension exceeds the cutting knife, and the extension partially covers the cutting knife . 8 . The retroperitoneal fat removal device according to claim 5 , wherein a one-way bearing is sheathed on the periphery of the cutting knife, and the driven gear is sheathed on the periphery of the one-way bearing. 9. The retroperitoneal fat removal device according to claim 8, characterized in that: one end of the driving member is exposed from the housing, and a return spring is installed between the other end of the driving member and the housing ; A locking mechanism for locking the cutting knife is installed in the housing; The locking mechanism includes a limit screw, and the end of the driving member adjacent to the return spring is installed with the limit screw; The locking mechanism also includes a spoon-shaped hook, which is rotatably installed in the housing through a rotating shaft. The spoon-shaped hook includes sequentially connected arc parts and inclined guide parts. The inclined guide part is provided with a through hole passing through the rotating shaft; The rotating shaft is located on the side of the casing where the cutting knife is adjacent to the drive member and exposed; When the driving member resets under the action of the spring force, the limit screw moves against the inclined guiding part, and drives the spoon-shaped hook against the cutting knife, so that the rotation of the cutting knife is stopped. 10. The retroperitoneal fat removal device according to claim 1, characterized in that: the cutting knife is sleeved with a bushing buckle adjacent to the negative pressure joint, and the bushing buckle is provided with an elastic limiter for the limit bushing. Buckle; The outer wall of the shaft sleeve is provided with an annular groove, and a sealing ring is embedded in the annular groove, and the sealing ring is clamped between the housing and the shaft sleeve.

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