CN114052839A

CN114052839A - Stripper for operation

Info

Publication number: CN114052839A
Application number: CN202111357031.9A
Authority: CN
Inventors: 袁贤瑞
Original assignee: Hunan Nalan Medical Technology Co ltd
Current assignee: Hunan Nalan Medical Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-02-18
Anticipated expiration: 2041-11-16
Also published as: CN114052839B

Abstract

The invention relates to the technical field of surgical equipment, and discloses a surgical stripper which comprises a handle, wherein the top end of the handle is fixedly provided with a connecting cylinder, the top end of the connecting cylinder is fixedly provided with a fixed seat, the fixed seat is fixedly provided with a fixed semi-ring, the connecting cylinder is provided with a sliding ring in a sliding manner, the top end of the sliding ring is fixedly provided with a sliding seat, the sliding seat is fixedly provided with a sliding semi-ring, the fixed semi-ring is matched with the sliding semi-ring, a driving mechanism is arranged in the connecting cylinder, and the driving mechanism drives the sliding ring to move on the connecting cylinder through the magnetic attraction effect; the driving mechanism drives the sliding half ring to move without manually shifting the sliding half ring, so that the convenience in use is improved, and the driving mechanism drives the sliding ring to move on the connecting cylinder through the magnetic attraction effect, so that a connecting structure and a limiting structure are not required to be arranged on the outer wall of the connecting cylinder, and the outer wall of the connecting cylinder is smooth, so that the cleaning after the operation is convenient.

Description

Stripper for operation

Technical Field

The invention relates to the technical field of surgical equipment, in particular to a surgical detacher.

Background

Tendon rupture and tendon stump retraction are common in clinical trauma surgery, after the tendon stump is explored and found, the tendon stump needs to be pulled and sutured, before suturing, a stripper needs to be used for stripping the tendon out, then suturing is carried out, the end part of the stripper is usually in a ring shape, after the end part is sleeved on the tendon, the end part of the stripper is gradually slid to strip the tendon.

Chinese invention patent CN106137329A discloses a tendon stripper, comprising: the stripping part comprises a ring body and at least one combining part, the ring body and the combining part are combined with each other, the ring body is provided with an edge part and a separating part, and the separating part separates the ring body into a plurality of parts; and the rod body is provided with a holding end and a combining end which are opposite, and the combining end is combined with the combining piece of the stripping piece. By means of the arrangement of the separating part, the ring body can be separated into the first ring body and the second ring body, and the first ring body and the second ring body can be mutually folded to enable the tendon to be positioned in the ring body of the stripping part, so that the number of cuts caused in an operation can be reduced, and the effect of reducing operation complications is achieved. Moreover, the tendon is naturally connected to the bone without using excessive fixing tools, thereby achieving the effect of increasing the convenience of the operation.

However, when the stripper is used for surgery, the first ring body and the second ring body need to be combined and sleeved on the tendon, then the first ring body and the second ring body are manually fixed through the rod body, the installation process is troublesome, and in order to combine the first ring body and the second ring body, a complex connecting structure is arranged on the first ring body and the second ring body, and the cleaning process after surgery is troublesome.

Therefore, it is necessary to provide a surgical dissector to solve the above-mentioned technical problems.

Disclosure of Invention

The invention aims to provide a stripper for operation, which solves the problems that the existing stripper for operation in the background art is troublesome in installation process and inconvenient to clean.

To achieve the above object, it is necessary to provide a driving mechanism for driving the sliding half rings and to simplify the external structure as much as possible for cleaning after the operation.

Based on the above thought, the invention provides the following technical scheme: the utility model provides a stripper for operation, includes the handle, the top fixed mounting of handle has the connecting cylinder, the top fixed mounting of connecting cylinder has the fixing base, fixed mounting has half fixing ring on the fixing base, slidable mounting has the sliding ring on the connecting cylinder, the top fixed mounting of sliding ring has the sliding seat, fixed mounting has the sliding half ring on the sliding seat, half fixing ring with sliding half ring looks adaptation, be provided with actuating mechanism in the connecting cylinder, actuating mechanism moves on the connecting cylinder through magnetic attraction drive sliding ring, the bottom of fixing base is provided with the locking mechanical system who locks sliding half ring through spacing mode.

As a further scheme of the invention, the driving mechanism comprises a motor and a screw rod, the motor is fixedly installed in the handle, the screw rod is rotatably installed in a connecting cylinder, an output end of the motor is in transmission connection with the bottom end of the screw rod, a sliding block is arranged in the connecting cylinder, a limiting groove is formed in the inner wall of the connecting cylinder, an electromagnetic block is fixedly installed on the outer wall of the sliding block, the electromagnetic block is located in the limiting groove, a first iron block is embedded and installed in the inner side wall of the sliding ring, and the first iron block and the electromagnetic block are attracted magnetically.

As a further scheme of the invention, the limiting groove comprises a lower guide groove, an upper guide groove and an inclined guide groove, the bottom end of the lower guide groove is communicated with the top end of the inclined guide groove, the bottom end of the inclined guide groove is communicated with the top end of the lower guide groove, the lower guide groove is arranged in parallel with the screw rod, the upper guide groove is arranged in parallel with the screw rod, and the plane where the lower guide groove and the screw rod are arranged is vertical to the plane where the upper guide groove and the screw rod are arranged.

As a further scheme of the invention, the electromagnetic block is arranged to be spherical, and the outer wall of the electromagnetic block is in contact with the inner wall of the limiting groove.

As a further aspect of the present invention, the sliding half ring is provided with a guiding portion near the top of the side wall of the stationary half ring, the stationary half ring is provided with a protruding portion near the top of the side wall of the sliding half ring, and the guiding portion is adapted to the protruding portion.

In a further aspect of the present invention, a reduced diameter portion having an outer diameter smaller than an outer diameter of the connecting cylinder is provided at a bottom portion of the connecting cylinder.

As a further aspect of the present invention, the locking mechanism includes a first mounting seat, the first mounting seat is fixedly mounted at the bottom end of the stationary half ring, the first mounting seat is provided with an opening, a first limiting block is slidably mounted in the opening, a first spring is fixedly mounted in the first mounting seat, one end of the first spring is fixedly connected to an inner wall of the first mounting seat, the other end of the first spring is fixedly connected to the first limiting block, and when the first limiting block extends out of the opening, an extended portion of the first limiting block is located at the bottom end of the sliding half ring.

As a further scheme of the present invention, a protective cover for closing the opening is fixedly mounted on the first mounting seat, and the protective cover is made of an elastic material.

As a further aspect of the present invention, the locking mechanism includes a second mounting seat, the second mounting seat is fixedly mounted at the bottom end of the stationary half ring, a second limiting block is slidably mounted in the second mounting seat, a second spring is fixedly mounted in the second mounting seat, one end of the second spring is fixedly connected to the inner side wall of the second mounting seat, the other end of the second spring is fixedly connected to the second limiting block, when the second limiting block extends out of the second mounting seat, the extending portion of the second limiting block is located at the bottom end of the sliding half ring, a sliding seat is slidably mounted at one side of the inner cavity of the second mounting seat close to the sliding ring, a guide ring is fixedly mounted in the second mounting seat, the guide ring is located at one end of the second spring away from the second limiting block, a first pull rope is disposed at one side of the sliding seat, and a second pull rope is disposed at the other side of the sliding seat, the first stay cord penetrates through the guide ring, one end of the first stay cord is fixedly connected with the second limiting block, the other end of the first stay cord is fixedly connected with the sliding seat, one end of the second stay cord is fixedly connected with the sliding seat, the other end of the second stay cord is fixedly connected with the inner side wall, close to the sliding ring, of the second mounting seat, and the sliding seat is made of iron materials.

As a further aspect of the present invention, a plurality of second iron blocks are fixedly attached to the second rope.

As a further scheme of the invention, a storage battery and a control chip are fixedly installed in the inner cavity of the grip, the storage battery is electrically connected with the control chip, and the control chip is electrically connected with the motor and the electromagnetic block.

Compared with the prior art, the invention has the beneficial effects that: the driving mechanism can drive the sliding ring to drive the sliding seat to move so that the sliding seat moves to be attached to the opposite side wall of the fixed seat, the sliding half ring is attached to the opposite side wall of the fixed half ring at the moment, so that the tendons are positioned in the ring-shaped part formed by the sliding half ring and the fixed half ring, and then the ring-shaped part is gradually moved to peel off the tendons.

Drawings

FIG. 1 is a schematic structural view of a first state of the present invention;

FIG. 2 is a schematic structural diagram of a second state of the present invention;

FIG. 3 is a schematic structural diagram of a third state of the present invention;

FIG. 4 is an enlarged view of the structure at A of FIG. 3 according to the present invention;

FIG. 5 is a schematic structural view of a connecting cylinder and a lead screw of the present invention;

FIG. 6 is a schematic structural view of the connector barrel of the present invention;

FIG. 7 is a schematic top view of the slip ring of the present invention;

FIG. 8 is a side view of the present invention;

FIG. 9 is an enlarged view of the structure at B of FIG. 8 according to the present invention;

FIG. 10 is a cross-sectional view of the grip of the present invention;

FIG. 11 is a schematic view of the stationary half ring and the sliding half ring according to the present invention;

fig. 12 is a schematic view of the structure of the locking mechanism of the present invention.

In the figure: 1. a grip; 2. a connecting cylinder; 201. a lower guide groove; 202. an inclined guide groove; 203. an upper guide groove; 204. a diameter reducing portion; 3. a fixed seat; 4. a stationary half ring; 401. a protrusion; 5. a sliding seat; 6. a sliding half ring; 601. a guide section; 7. a slip ring; 8. a screw rod; 9. a slider; 10. an electromagnetic block; 11. a first iron block; 12. a first mounting seat; 13. a first spring; 14. a first stopper; 15. a protective sleeve; 16. a motor; 17. a storage battery; 18. a control chip; 19. a second mounting seat; 20. a second limiting block; 21. a second spring; 22. a guide ring; 23. a first pull cord; 24. a slide base; 25. a second pull cord; 26. and a second iron block.

Detailed Description

Referring to fig. 1 to 7, in an embodiment of the present invention, a surgical stripper includes a handle 1, a connecting cylinder 2 is fixedly installed at a top end of the handle 1, a fixing seat 3 is fixedly installed at a top end of the connecting cylinder 2, a fixing half ring 4 is fixedly installed on the fixing seat 3, a sliding ring 7 is slidably installed on the connecting cylinder 2, a sliding seat 5 is fixedly installed at a top end of the sliding ring 7, a sliding half ring 6 is fixedly installed on the sliding seat 5, the fixing half ring 4 is adapted to the sliding half ring 6, a driving mechanism is disposed in the connecting cylinder 2, the driving mechanism drives the sliding ring 7 to move on the connecting cylinder 2 through a magnetic attraction effect, and a locking mechanism for locking the sliding half ring 6 is disposed at a bottom end of the fixing seat 3.

When the tendon connecting device is used specifically, a small section of a tendon is pulled out, the holding rod is held by hand to move the fixed half ring 4 to the side of the pulled tendon, the tendon is positioned on the inner side of the fixed half ring 4, then the driving mechanism drives the sliding ring 7 to drive the sliding seat 5 to move, the sliding seat 5 is moved to be attached to the opposite side wall of the fixed seat 3, the sliding half ring 6 is attached to the opposite side wall of the fixed half ring 4 at the moment, the tendon is positioned in a ring-shaped part formed by the sliding half ring 6 and the fixed half ring 4, then the ring-shaped part is gradually moved to peel off the tendon, the driving mechanism can drive the sliding half ring 6 to move, manual shifting of the sliding half ring 6 is not needed, convenience in use is improved, and the driving mechanism drives the sliding ring 7 to move on the connecting cylinder 2 through magnetic attraction effect, so that a connecting structure and a limiting structure are not needed to be arranged on the outer wall of the connecting cylinder 2, and the outer wall of the connecting cylinder 2 is smooth, so as to facilitate cleaning after surgery.

In this embodiment, preferably, the driving mechanism includes a motor 16 and a screw rod 8, the motor 16 is fixedly installed in the handle 1, the screw rod 8 is rotatably installed in the connecting cylinder 2, an output end of the motor 16 is in transmission connection with a bottom end of the screw rod 8, a slider 9 is arranged in the connecting cylinder 2, a limiting groove is formed in an inner wall of the connecting cylinder 2, an electromagnetic block 10 is fixedly installed on an outer wall of the slider 9, the electromagnetic block 10 is located in the limiting groove, a first iron block 11 is embedded in an inner side wall of the slip ring 7, and the first iron block 11 and the electromagnetic block 10 are magnetically attracted; the output end of the motor 16 drives the screw rod 8 to rotate when rotating, the screw rod 8 drives the sliding block 9 to move up and down when rotating, the sliding block 9 drives the electromagnetic block 10 to move up and down when moving up and down, and the electromagnetic block 10 adsorbs the first iron block 11 through the magnetic attraction effect, so that the sliding ring 7 is driven to move up and down when the sliding block 9 moves up and down.

In this embodiment, preferably, the limiting groove includes a lower guide groove 201, an upper guide groove 203 and an inclined guide groove 202, the bottom end of the lower guide groove 201 is communicated with the top end of the inclined guide groove 202, the bottom end of the inclined guide groove 202 is communicated with the top end of the lower guide groove 201, the lower guide groove 201 is parallel to the screw rod 8, the upper guide groove 203 is parallel to the screw rod 8, and the plane where the lower guide groove 201 and the screw rod 8 are located and the plane where the upper guide groove 203 and the screw rod 8 are located are perpendicular to each other; when the sliding half ring 6 is moved in a state where it is arranged symmetrically with respect to the stationary half ring 4, the sliding half ring 6 slides along the surface of the tendon, and the sliding half ring 6 may scratch the tendon, thereby improving the stopper groove, when the electromagnetic block 10 is positioned in the lower guide groove 201, the plane where the axis of the sliding half ring 6 is positioned is perpendicular to the plane where the axis of the connecting cylinder 2 is positioned and the plane where the axis of the stationary half ring 4 is positioned is perpendicular to the plane where the axis of the connecting cylinder 2 is positioned, so that the distance between the sliding half ring 6 and the tendon is longer, when the electromagnetic block 10 slides into the inclined guide groove 202, the electromagnetic block 10 is gradually shifted under the guiding action of the inclined guide groove 202, thereby driving the slip ring 7 to rotate and gradually move into the upper guide groove 203, when the electromagnetic block 10 moves into the upper guide groove 203, the axial lead of the sliding half ring 6 coincides with the axial lead of the fixed half ring 4, so that the angle of the sliding half ring 6 can be adjusted in the moving process.

In this embodiment, it is preferable that the electromagnet block 10 is provided in a spherical shape; the spherical electromagnetic block 10 enables the friction force of the electromagnetic block 10 moving in the limiting groove to be smaller, and the electromagnetic block 10 can not only play a role in adsorption, but also play a role in limiting.

In this embodiment, preferably, two electromagnetic blocks 10 and two first iron blocks 11 are provided, the two electromagnetic blocks 10 are symmetrically arranged with the axis of the connecting cylinder 2 as a symmetric center, and the two first iron blocks 11 are symmetrically arranged with the axis of the connecting cylinder 2 as a symmetric center; the slip ring 7 is not easy to shift during the movement process by the relative adsorption of the two electromagnetic blocks 10 and the two first iron blocks 11.

In this embodiment, preferably, the sliding half ring 6 is provided with a guiding portion 601 near the top of the side wall of the stationary half ring 4, the stationary half ring 4 is provided with a protrusion 401 near the top of the side wall of the sliding half ring 6, the guiding portion 601 is adapted to the protrusion 401, and the guiding portion 601 is a rounded corner at the top of the side wall of the sliding half ring 6; under the action of the guide part 601, even if the axis of the sliding half ring 6 does not coincide with the axis of the fixed half ring 4 when moving upwards, fine adjustment can be performed under the guiding action of the guide part 601, so that the sliding half ring 6 and the fixed half ring 4 can be well attached together; and the setting of guide portion 601 for the laminating area of slip semi-ring 6 and stationary half ring 4 is bigger, and in the use, the adsorption affinity each other is stronger, and the compactness is better, makes blood be difficult for permeating into the junction of stationary half ring 4 and slip semi-ring 6, and the laminating position is comparatively level and smooth, does not have the dog-ear, cleans fairly simply.

In this embodiment, preferably, a reduced diameter portion 204 is provided at the bottom of the connecting cylinder 2, and the outer diameter of the reduced diameter portion 204 is smaller than the outer diameter of the connecting cylinder 2; so that during cleaning the slip ring 7 can be slid down onto the reduced diameter portion 204 so that the inner wall of the slip ring 7 is exposed for cleaning of the slip ring 7.

Referring to fig. 8 to 10, in an embodiment of the present invention, the locking mechanism includes a first mounting seat 12, the first mounting seat 12 is fixedly mounted at the bottom end of the stationary half ring 4, an opening is formed in the first mounting seat 12, a first stopper 14 is slidably mounted in the opening, a first spring 13 is fixedly mounted in the first mounting seat 12, one end of the first spring 13 is fixedly connected to an inner wall of the first mounting seat 12, the other end of the first spring 13 is fixedly connected to the first stopper 14, and when the first stopper 14 extends out of the opening, an extending portion of the first stopper 14 is located at the bottom end of the sliding half ring 6; the bottom wall of the first limiting block 14 is provided with an inclined surface, so that the first limiting block 14 is pushed into the first mounting seat 12 when the sliding half ring 6 slides upwards, when the sliding half ring 6 is completely attached to the fixed half ring 4, the first limiting block 14 is pushed out under the elastic action of the first spring 13, the extending part of the first limiting block 14 is located at the bottom end of the sliding half ring 6, so that the sliding half ring 6 cannot slide downwards, the sliding half ring 6 is locked, when the locking needs to be released, the first limiting block 14 is pressed, manual locking is not needed, the convenience of operation is improved, and the operation time is saved.

In this embodiment, preferably, a protecting sleeve 15 for closing the opening is fixedly installed on the first installing seat 12, and the protecting sleeve 15 is made of an elastic material; blood does not enter the interior of the first mounting 12 under the influence of the protective sheath 15 for ease of maintenance and cleaning.

Referring to fig. 11 and 12, in another embodiment of the locking mechanism in the embodiment of the present invention, the locking mechanism includes a second mounting seat 19, the second mounting seat 19 is fixedly mounted at the bottom end of the stationary half ring 4, a second stopper 20 is slidably mounted in the second mounting seat 19, a second spring 21 is fixedly mounted in the second mounting seat 19, one end of the second spring 21 is fixedly connected to an inner side wall of the second mounting seat 19, the other end of the second spring 21 is fixedly connected to the second stopper 20, when the second stopper 20 extends out of the second mounting seat 19, an extended portion of the second stopper 20 is located at the bottom end of the sliding half ring 6, a sliding seat 24 is slidably mounted at a side of an inner cavity of the second mounting seat 19 close to the sliding ring 7, a guide ring 22 is fixedly mounted in the second mounting seat 19, and the guide ring 22 is located at an end of the second spring 21 far from the second stopper 20, a first pull rope 23 is arranged on one side of the sliding seat 24, a second pull rope 25 is arranged on the other side of the sliding seat 24, the first pull rope 23 penetrates through the guide ring 22, one end of the first pull rope 23 is fixedly connected with the second limiting block 20, the other end of the first pull rope 23 is fixedly connected with the sliding seat 24, one end of the second pull rope 25 is fixedly connected with the sliding seat 24, the other end of the second pull rope 25 is fixedly connected with the inner side wall, close to the sliding ring 7, of the second mounting seat 19, and the sliding seat 24 is made of an iron material; the bottom wall of the second stopper 20 is provided with an inclined surface, so that when the sliding half ring 6 slides upwards, the second stopper 20 is pushed into the second mounting seat 19, when the sliding half ring 6 is completely attached to the stationary half ring 4, under the elastic action of the second spring 21, the second stopper 20 is pushed out, so that the protruding part of the second stopper 20 is located at the bottom end of the sliding half ring 6, so that the sliding half ring 6 cannot slide downwards, thereby locking the sliding half ring 6, when the locking needs to be released, the electromagnetic block 10 is opened, under the magnetic attraction action of the electromagnetic block 10, the electromagnetic block 10 adsorbs the sliding seat 24 to move towards the electromagnetic block 10, so that the sliding seat 24 pulls the first pull rope 23 to move towards the sliding ring 7, thereby pulling the second stopper 20 into the inner cavity of the second mounting seat 19, then the sliding half ring 6 can slide downwards, and the movement of the second stopper 20 is controlled by the electromagnetic block 10, do not need manual removal second stopper 20, it is more convenient to control, utilizes electromagnetic block 10, has realized spacing, drive sliding ring 7 and the work of drive locking mechanical system to slider 9, and transmits through the electromagnetic action, has reduced connection structure, makes the cleaning process after the operation comparatively simple.

In this embodiment, preferably, a plurality of second iron blocks 26 are fixedly mounted on the second pull rope 25; because the distance between slide 24 and the electromagnetism piece 10 is far away, probably can't adsorb slide 24 when electromagnetism piece 10 magnetism is not enough, consequently set up second iron plate 26, when electromagnetism piece 10 opened, electromagnetism piece 10 adsorbs second iron plate 26 one by one and removes to pulling slide 24 gradually and removing, through this structure, can reducing the required magnetism of electromagnetism piece 10, avoid the work of magnetic absorption too big influence other ironwork instruments in the operation process.

Referring to fig. 10, in the embodiment of the present invention, a storage battery 17 and a control chip 18 are fixedly installed in an inner cavity of the grip 1, the storage battery 17 is electrically connected to the control chip 18, and the control chip 18 is electrically connected to the motor 16 and the electromagnetic block 10; the model of the control chip 18 is KD116, the storage battery 17 can supply power to the control chip 18, the motor 16 and the electromagnetic block 10, the control chip 18 can control the work of the motor 16 and the electromagnetic block 10, the handle 1 can be provided with a button, and the control chip 18 can be controlled by the button, so that the motor 16 and the electromagnetic block 10 are turned on or off.

The working principle of the invention is as follows: firstly, pulling out a small section of tendon, then, holding a holding rod by hand to move the fixed half ring 4 to the side of the pulled tendon, so that the tendon is positioned at the inner side of the fixed half ring 4, then, driving a slip ring 7 by a driving mechanism to drive a sliding seat 5 to move, so that the sliding seat 5 moves to be attached to the opposite side wall of the fixed seat 3, at the moment, the sliding half ring 6 is attached to the opposite side wall of the fixed half ring 4, so that the tendon is positioned in a ring-shaped member formed by the sliding half ring 6 and the fixed half ring 4, then, gradually moving the ring-shaped member to peel off the tendon, and driving the sliding half ring 6 to move by the driving mechanism; when the electromagnetic slip ring is driven, the output end of the motor 16 rotates to drive the screw rod 8 to rotate, the screw rod 8 rotates to drive the sliding block 9 to move up and down, the sliding block 9 moves up and down to drive the electromagnetic block 10 to move up and down, and the electromagnetic block 10 adsorbs the first iron block 11 through the magnetic attraction effect, so that the sliding ring 7 is driven to move up and down when the sliding block 9 moves up and down; when the electromagnetic block 10 is positioned in the lower guide groove 201, the plane of the axis of the sliding half ring 6 and the axis of the connecting cylinder 2 is perpendicular to the plane of the axis of the fixed half ring 4 and the axis of the connecting cylinder 2, so that the distance between the sliding half ring 6 and the tendon is far, when the electromagnetic block 10 slides into the inclined guide groove 202, the electromagnetic block 10 gradually deviates under the guiding action of the inclined guide groove 202, so as to drive the sliding ring 7 to rotate and gradually move into the upper guide groove 203, and when the electromagnetic block 10 moves into the upper guide groove 203, the axis of the sliding half ring 6 is superposed with the axis of the fixed half ring 4, so that the angle adjustment in the moving process of the sliding half ring 6 is realized; when the sliding half ring 6 is completely attached to the stationary half ring 4, the first stopper 14 is pushed out under the elastic action of the first spring 13, so that the extended portion of the first stopper 14 is located at the bottom end of the sliding half ring 6, and the sliding half ring 6 cannot slide downward, thereby locking the sliding half ring 6, and when the locking needs to be released, the first stopper 14 is pressed.

Claims

1. A surgical detacher comprises a handle, and is characterized in that: the top fixed mounting of handle has the connecting cylinder, the top fixed mounting of connecting cylinder has the fixing base, fixed mounting has the stationary semi-ring on the fixing base, slidable mounting has the sliding ring on the connecting cylinder, the top fixed mounting of sliding ring has the sliding seat, fixed mounting has the slip semi-ring on the sliding seat, stationary semi-ring with slip semi-ring looks adaptation, be provided with actuating mechanism in the connecting cylinder, actuating mechanism drives the sliding ring through magnetism and removes on the connecting cylinder, the bottom of fixing base is provided with the locking mechanical system through spacing mode locking slip semi-ring.

2. A surgical dissector as claimed in claim 1, wherein: the driving mechanism comprises a motor and a screw rod, the motor is fixedly installed in the handle, the screw rod is rotatably installed in the connecting cylinder, the output end of the motor is connected with the bottom end of the screw rod in a transmission mode, a sliding block is arranged in the connecting cylinder, a limiting groove is formed in the inner wall of the connecting cylinder, an electromagnetic block is fixedly installed on the outer wall of the sliding block and located in the limiting groove, a first iron block is installed in the inner side wall of the sliding ring in an embedded mode, and the first iron block and the electromagnetic block are attracted magnetically.

3. A surgical dissector as claimed in claim 2, wherein: the limiting groove comprises a lower guide groove, an upper guide groove and an inclined guide groove, the bottom end of the lower guide groove is communicated with the top end of the inclined guide groove, the bottom end of the inclined guide groove is communicated with the top end of the lower guide groove, the lower guide groove is arranged in parallel with the screw rod, the upper guide groove is arranged in parallel with the screw rod, and the plane where the lower guide groove and the screw rod are located and the plane where the upper guide groove and the screw rod are located are arranged perpendicularly.

4. A surgical dissector as claimed in claim 1, wherein: the electromagnetic block is set to be spherical, and the outer wall of the electromagnetic block is in contact with the inner wall of the limiting groove.

5. A surgical dissector as claimed in claim 1, wherein: the top that the lateral wall of slip semi-ring is close to fixed semi-ring is equipped with guide portion, the top that the lateral wall of fixed semi-ring is close to the slip semi-ring is provided with the protruding portion, guide portion with protruding portion adaptation.

6. A surgical dissector as claimed in claim 1, wherein: the bottom of connecting cylinder is equipped with the undergauge portion, the external diameter of undergauge portion is less than the external diameter of connecting cylinder.

7. A surgical dissector as claimed in claim 1, wherein: the locking mechanism comprises a first mounting seat, the first mounting seat is fixedly mounted at the bottom end of the fixed semi-ring, an opening is formed in the first mounting seat, a first limiting block is slidably mounted in the opening, a first spring is fixedly mounted in the first mounting seat, one end of the first spring is fixedly connected with the inner wall of the first mounting seat, the other end of the first spring is fixedly connected with the first limiting block, and when the first limiting block extends out of the opening, the extending part of the first limiting block is located at the bottom end of the sliding semi-ring.

8. A surgical dissector as claimed in claim 7, wherein: a protective sleeve for sealing the opening is fixedly mounted on the first mounting seat and made of elastic materials.