Cutting device for soft tissue release operation

Abstract

The invention relates to the technical field of medical instruments, in particular to a cutting device for soft tissue release surgery, which comprises a blade, a transparent sleeve, a push rod and an operating handle, the operating handle comprises an upper shell and a lower shell, and a friction motion structure is arranged in the operating handle formed by the upper shell and the lower shell; a friction motion structure arranged in the operating handle comprises a sliding friction structure between the two inclined faces and a rolling friction structure between the arc and the straight face, translation in one direction is converted into translation in the 90-degree direction through sliding between the two inclined faces, and by means of oblique angle arrangement of the inclined faces, translation in the 90-degree direction is converted into translation in the 90-degree direction. The displacement of the driven part is smaller than that of the driving part, and displacement amplification is achieved; the rotation of the circular arc of the driving piece is converted into the translation of the driven piece through the sliding between the circular arc and the straight surface, so that the amplification of the displacement is realized; and after the displacement of the driven part is amplified by the driving part, the displacement can be accurately controlled, so that the dynamic fine adjustment of the lifting cutting amount of the blade varies from person to person is realized.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a cutting device for soft tissue release surgery. Background Art

[0002] In the field of orthopedics, there is a common disease, that is, the soft tissue (ligament, aponeurosis, etc.) is diseased, swollen, thickened and hardened, and the blood vessels or nerves underneath are compressed, causing pain and numbness in the patient's area. Typical area diseases include carpal tunnel syndrome, which is a group of symptoms and signs caused by the compression of the median nerve in the carpal tunnel. It is the most common type of peripheral nerve compression syndrome. Patients show tingling, numbness, weakness or pain in the radial side of the palm and three and a half fingers on the radial side, and some feel pain in the arm between the hand and the elbow. For carpal tunnel syndrome, the traditional surgery is to cut the skin at the wrist, expose the transverse carpal ligament and cut it to achieve the purpose of releasing nerve compression. However, this surgical method is relatively traumatic and has a high risk of postoperative infection. The more commonly used method is endoscopic minimally invasive release surgery, in which a slender knife with a blade on the head is used to cut the diseased soft tissue under the field of view of an endoscope (arthroscopy).

[0003] Endoscopic "minimally invasive" carpal tunnel release surgery is divided into two categories: double approach (Chow method) and single approach (Agee method). The double approach is to make a small incision of about 25px on the proximal and distal sides of the carpal tunnel, and use a small hook knife to cut the transverse carpal ligament under the guidance of an endoscope. One of the two small incisions is used to insert the arthroscope, and the other is used to insert the small hook knife, and the two enter in opposite directions. During the operation, the doctor needs to hold the arthroscope in one hand and the scalpel in the other hand, or the doctor holds the scalpel and the assistant holds the arthroscope. The single approach only makes a small incision on the proximal side of the carpal tunnel, and under the guidance of the endoscope, a special cutter is used to cut and release the transverse carpal ligament.

[0004] Compared with the double-entry surgery, the single-entry surgery has one less incision, less trauma, and relatively simpler operation. However, this single-entry surgery requires the cutter and the arthroscope to enter in the same direction and through the same incision. This special cutter combines the field of view provided by the arthroscope and the cutting function of the blade, rather than an ordinary surgical scalpel. For example, CN201710339317 describes a compact endoscopic surgical blade assembly and its use method, in which the blade and the endoscope (also called arthroscope) are integrated together, and the endoscope is inserted through the inner hole of the assembly to the back of the blade to provide a field of view for the blade's cutting during surgery.

[0005] At present, the lifting amount of this special cutter blade is manually controlled by the rear end operating handle. The lifting amount of the blade determines the cutting amount. The higher the blade is lifted relative to the tube, the thicker the soft tissue that can be cut. In actual surgery, the thickness of the cut soft tissue is generally around 4 mm, which also means that the lifting amount of the blade is very small. Excessive lifting amount will cause tissue damage. In addition, there are individual differences among patients, and the cutting thickness is not the same. For example, some people need to cut the ligament with a thickness of 4 mm, while others need 3 mm or 5 mm. This fine blade height adjustment cannot be achieved by the existing devices. In addition, some patients' transverse carpal ligaments become hard due to the thickness of the lesions, and it takes a lot of effort to completely cut them off. The existing devices currently require the operator to manually control the cutting height of the blade, which makes the hands easily fatigued. In order to solve this drawback of the existing devices, the present invention designs a cutting device for soft tissue release surgery, which can finely adjust the blade lifting height and realize the position locking after the blade is lifted. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a cutting device for soft tissue release surgery, which solves the problems in the prior art that the blade lifting amount is very small, the hand is difficult to accurately control the specific lifting amount, and the hand is prone to fatigue during the operation.

[0007] The cutting device for soft tissue release surgery of the present invention comprises a blade, a transparent sleeve, a push rod and an operating handle.

[0008] The operating handle comprises an upper shell and a lower shell, wherein a friction motion structure is arranged in the operating handle composed of the upper shell and the lower shell, wherein the friction motion structure comprises an active member and a driven member, wherein the active member and the driven member are in friction abutment with each other, wherein one end of the push rod is connected to the driven member, and the other end is rotationally connected to the blade, wherein the active member pushes the driven member to move, and the driven member drives the push rod to move forward and backward in a straight line, and the movement of the push rod is transmitted to the blade through the rotating shaft, thereby realizing the lifting or retraction of the blade from the transparent sleeve;

[0009] A one-way limiting structure is also provided in the operating handle, and the one-way limiting structure includes a ratchet and a pawl. The ratchet is adapted to the active part in the friction motion structure. The ratchet is provided with a helical tooth structure, and cooperates with the pawl to achieve one-way limiting. The pawl is individually controlled by an unlocking device on the operating handle.

[0010] As a further improvement of the present invention, a torsion spring structure is provided on the pawl for automatic resetting of the pawl, and at least one of the active member and the driven member of the friction motion structure includes an elastic structure for resetting the position of the active member and the driven member.

[0011] As a further improvement of the present invention, the operating handle contains a guide structure inside, which is tapered as a whole and fixedly connected to the upper shell or the lower shell constituting the operating handle for guiding the insertion of the arthroscope.

[0012] As a further improvement of the present invention, the surface of the transparent sleeve has scale markings for indicating the length, and one side of the front end of the transparent sleeve is open for lifting the blade; the front end of the transparent sleeve is also provided with an axial hole, in which an axis is arranged for connecting the blade so that the blade rotates around the axis.

[0013] As a further improvement of the present invention, the push rod is located in the transparent sleeve, and the push rod performs reciprocating linear motion along the inner cavity of the transparent sleeve. A blade rotation groove is provided above the head end of the push rod, and the blade rotates in the blade rotation groove.

[0014] As a further improvement of the present invention, the active part of the friction motion structure is a cam, and the driven part is a slider. The cam presses the slider through rolling friction to achieve the forward and backward movement of the slider. A shaft is passed through the middle of the cam, and a ratchet is also installed on the shaft. The cam and the ratchet are driven to rotate by the shaft to achieve the movement of the driven part and the synchronous locking of the position.

[0015] As a further improvement of the present invention, a through hole is provided at the center of the follower of the friction motion structure for passing an arthroscope, and a spring reset structure is provided on one side of the follower.

[0016] As a further improvement of the present invention, a U-shaped groove is provided on one side of the operating handle, and bumps are symmetrically provided on the U-shaped groove for limiting the position of the arthroscope.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The friction motion structure arranged inside the operating handle of the present invention comprises a sliding friction structure between two inclined surfaces and a rolling friction structure between the circular arc and the straight surface. The sliding between the two inclined surfaces converts the translation in one direction into the translation in the 90° direction. By setting the inclined angle of the inclined surfaces, the displacement of the driven member is smaller than that of the active member, thereby realizing displacement amplification. The sliding between the circular arc and the straight surface converts the rotation of the active member circular arc into translation of the driven member, thereby realizing displacement amplification. After the displacement of the driven member is amplified by the active member, it can be precisely controlled, thereby realizing dynamic and fine adjustment of the blade lifting and cutting amount according to different people.

[0019] The cooperation between the locking claw and the ratchet prevents the operation from rotating, thereby achieving one-way locking of the angle. The locking of the ratchet angle means the locking of the front blade lifting position, and the lifted part of the blade cannot be retracted. In this way, there is no need to constantly operate the button (or wheel) on the handle during the operation, eliminating the disadvantage of the operator's hand fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 : A three-dimensional schematic diagram of the present invention;

[0022] Figure 2 : A bottom-up stereoscopic schematic diagram of the present invention;

[0023] Figure 3 : Schematic diagram of the parts of the present invention after removing the lower shell and the guide plate;

[0024] Figure 4 : The bottom view of the present invention is shown in the cutaway position;

[0025] Figure 5 : The present invention Figure 4 Middle AA section;

[0026] Figure 6 : A three-dimensional diagram of the blade of the present invention;

[0027] Figure 7 : Combination diagram of blade and push rod of the present invention;

[0028] Figure 8 : The rear end structure of the push rod of the present invention;

[0029] Fig. 9 : Assembly drawing of push rod, blocking block and sliding block of the present invention;

[0030] Fig.10 : Schematic diagram of the slider structure of the present invention;

[0031] Fig.11 : The cross-sectional position of the slider of the present invention is shown;

[0032] Fig.12 : The present invention Fig.11 Middle BB section;

[0033] Fig.13 : The guide piece and the upper shell matching diagram of the present invention;

[0034] Fig.14 : Assembly drawing of the cam and ratchet of the present invention;

[0035] Fig.15 : Schematic diagram of the movement dimensions of the cam and the slider of the present invention;

[0036] Fig.16 : Schematic diagram of the ratchet and pawl matching of the present invention;

[0037] Fig.17 : A three-dimensional schematic diagram of the ratchet of the present invention;

[0038] Fig.18 : A three-dimensional schematic diagram of the combination of the upper shell and the lower shell of Example 2 of the present invention;

[0039] Fig.19 : Schematic diagram of the interior of the operating handle of embodiment 2 of the present invention;

[0040] Fig. 20 : A schematic front view of an operating handle according to Embodiment 2 of the present invention;

[0041] Fig.21 : The present invention Fig. 20 AA section diagram;

[0042] Fig. 22 : A three-dimensional schematic diagram of the combination of the ratchet and the pressing block of the present invention;

[0043] Fig.23 : The three-dimensional and schematic diagram of the combination of the helical teeth, the slider and the inclined surface of the slider of the present invention;

[0044] Fig.24 : Schematic diagram of the combination of the mounting groove and the rotating shaft of the present invention;

[0045] Fig.25 : A three-dimensional schematic diagram of the cooperation between the arthroscope and the liner tube of the present invention;

[0046] Fig.26 , a schematic diagram of the internal structure of the liner pipe of the present invention;

[0047] Fig. 27 , a schematic diagram of the movement direction of the pressing block and the sliding block combination of the present invention.

[0048] In the figure: 01, head end; 02, blade; 03, transparent sleeve; 04, dial button; 05, upper shell; 06, lower shell; 07, rotating wheel; 08, large locking screw; 09, small locking screw; 10, limit screw; 11, blocking block; 12, slider; 13, large torsion spring; 14, cam; 15, spring; 16, large rotating shaft; 17, ratchet; 18, small torsion spring; 19, push rod; 20, guide plate; 21, small rotating shaft; 22, push rod locking nail; 23, spring locking nail; 24, ratchet; 25, button; 26, spring one; 27, spring two; 28, arthroscope;

[0049] 0201, blade edge; 0202, blade shaft; 0203, shaft hole;

[0050] 0301, blade shaft hole; 0302, observation window;

[0051] 0501, connecting column; 0502, sliding block; 0503, pressing block;

[0052] 05021, inclined plane

[0053] 05022, button connecting rod; 05024, helical teeth; 05023, spring guide rod;

[0054] 0601, U-shaped groove;

[0055] 1101, glue overflow tank;

[0056] 1201, through hole; 1202, cam pressing portion; 1203, threaded hole for spring locking pin; 1204, threaded hole for push rod locking pin;

[0057] 1401, torsion spring mounting hole; 1402, shaft mounting hole;

[0058] 1701, locking claw; 1702, torsion spring fixing groove; 1703, ratchet rotating shaft; 1704, dial button mounting portion;

[0059] 1705, limit block; 1706, mounting slot; 1707, rotating shaft;

[0060] 1901, sliding groove; 1902, push rod head end; 1903, blade rotation groove; 1904, push rod; 1905, groove structure;

[0061] 2001, mounting column; 2002, front narrow channel; 2003, rear wide channel;

[0062] 2801, right inner lining tube; 2802, left inner lining tube. DETAILED DESCRIPTION

[0063] The following will disclose multiple embodiments of the present invention with diagrams. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these physical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and components will be depicted in a simple schematic manner in the diagram.

[0064] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] Embodiment 1:

[0066] like Figure 1 to Figure 7As shown, the front end of the cutting device includes a head end 01, a blade 02, and a transparent sleeve 03. The head end 01 and the transparent sleeve 03 can be processed as two parts, and then connected and fixed into one piece by a common mechanical connection method, such as bonding, interference fit, pin fixation, etc., or can be manufactured in one piece by injection molding. The head end 01 is conical in shape, and the transparent sleeve 03 is located at the blade 02 and has a blade shaft hole 0301 and an observation window 0302. The blade 02 has an axis hole 0203, and the small shaft 21 passes through the shaft hole 0203 and the blade shaft hole 0301, so that the blade can rotate around the small shaft 21. The observation window 0302 is a notch on the transparent sleeve 03. The transparent sleeve 03 is designed with a scale mark to indicate the length. The transparent sleeve 03 is made of a material with good light transmittance, preferably acrylic material and polycarbonate material.

[0067] The blade 02 also includes a blade edge 0201 and a blade shaft 0202. The blade edge is sharp and is used to cut soft tissue. The blade shaft 0202 cooperates with the sliding groove 1901 on the push rod 19, and the blade shaft 0202 can slide up and down in the sliding groove 1901. The front end of the push rod 19 is a push rod head end 1902. The push rod head end 1902 can be processed as a whole with the push rod 1904 at the back, or it can be processed separately. The two are connected by commonly used mechanical methods such as bonding, threaded connection, welding, etc. There is a blade rotation groove 1903 above the push rod head end 1902, and the blade 02 rotates in the blade rotation groove 1903.

[0068] The rear side of the transparent sleeve 03 is connected to an operating handle, which is divided into an upper shell 05 and a lower shell 06. The rear side of the lower shell 06 has a U-shaped groove 0601. The upper shell 05 and the lower shell 06 are connected by buckles and screws.

[0069] See also Fig.14 and Fig.19 The friction motion structure includes a slider 12, a movable block 0502, a pressing block 0503 and a cam 14;

[0070] like Figure 8 to Figure 12 As shown, the rear end of the push rod 1904 on the push rod 19 is connected to a groove structure 1905, and the push rod locking pin 22 is screwed into the push rod locking pin threaded hole 1204 on the slider 12, abutting against the groove structure 1905 on the push rod 19, so that the slider 12 and the push rod 19 are connected together, and the forward and backward sliding of the slider 12 drives the push rod 19 to slide forward and backward accordingly.

[0071] A block 11 is designed at the rear end of the transparent sleeve 03. The block 11 is inserted into the transparent sleeve 03. A glue overflow groove 1101 is designed on the surface of the block 11. After glue is dripped into it, the block 11 is connected to the transparent sleeve 03. A through hole 1201 is provided in the center of the slider 12 for passing an arthroscope. A spring locking nail threaded hole 1203 is also provided on one side of the slider 12, and a spring locking nail 23 is installed.

[0072] like Fig.13 As shown, the guide piece 20 follows the slider 12, and the guide piece 20 has a mounting post 2001, which is mounted on the connecting post 0501 on the upper shell 05, thereby fixing the guide piece 20. The front side of the guide piece 20 is a front narrow channel 2002, and the rear side is a rear wide channel 2003. The inner diameter of the front narrow channel 2002 is smaller than that of the rear wide channel 2003, and the whole is in line with the size of the arthroscope.

[0073] like Figures 14-15 As shown, a large rotating shaft 16 is arranged in the cavity of the operating handle composed of the upper shell 05 and the lower shell 06 of the operating handle, and a cam 14 and a ratchet 24 are installed on the large rotating shaft 16. The cam 14 pushes the cam pressing part 1202 on the slider 12 to move the slider 12 forward, and the slider 12 drives the push rod 19 to move. The front end of the push rod 19 cooperates with the blade shaft 0202 of the blade 02, so that the blade 02 rotates along the small rotating shaft 21 to lift the blade 02. One end of the large rotating shaft 16 is connected to the rotating wheel 07, and the rotating wheel 07 is fixed by the large locking screw 08, and the other end is connected to the limit screw 10.

[0074] See also Fig.14 The cam 14 presses against the slider 12 to push the slider 12 to move. The distance L2 between the outermost tangent circle of the cam 14 and the inner circle of the cam 14 is not less than the distance L1 of the slider 12. The distance L1 of the slider 12 is 1 to 4 mm. The cam 14 includes a torsion spring mounting hole 1401 for mounting the large torsion spring 13 and a shaft mounting hole 1402 for mounting on the large rotating shaft 16. The shaft mounting hole 1402 can play a role of circumferential limit.

[0075] like Figures 16-17 As shown, the ratchet 24 and the pawl 17 are used together, and the pawl 17 restricts the ratchet 24 to move only in direction 1. When the rotating wheel 07 is turned in direction 1, the large torsion spring 13 mounted on the large rotating shaft 16 is twisted and compressed, and the ratchet 24 also rotates in direction 1 synchronously, pushing the pawl 17 to twist the small torsion spring 18 and rotate in the opposite direction of direction 1 until its locking pawl 1701 jumps into the next ratchet tooth. The slider 12 is pushed forward, and the spring 15 connected to it is stretched;

[0076] The pawl 17 is provided with a torsion spring fixing groove 1702 for fixing one end of a small torsion spring 18. The pawl 17 rotates along the pawl shaft 1703. The small torsion spring 18 is sleeved on the pawl shaft 1703 and the other end is fixed on the upper shell 05 of the operating handle. The end of the pawl 17 is a dial button mounting portion 1704, and the dial button 04 and the pawl 17 are firmly connected together through a small locking screw 09.

[0077] After the locking claw 1701 falls into the teeth of the ratchet 17, if the ratchet 24 rotates in the opposite direction of direction 1, it cannot rotate due to the locking claw 1701, thereby achieving angle locking. The locking of the ratchet angle means the locking of the entire large rotating shaft 16, which means the position of the cam 14 is locked. The position locking of the cam 14 also means the locking of the lifting position of the front blade 02, and the lifted part of the blade 02 cannot be retracted.

[0078] When the dial button 04 is pulled, the pawl 17 rotates in the opposite direction of direction 1, so that the locking pawl 1701 and the ratchet 24 are separated, and the large rotating shaft 16 also rotates in the opposite direction of direction 1 under the torsion spring restoring torque of the large torsion spring 13, and the slider 12 retreats backward under the tension of the spring 15. Synchronously, the slider 12 drives the front push rod 19 to retreat backward, and the push rod 19 drives the blade 02 to move along Figure 5 When the viewing angle is rotated counterclockwise, the blade 02 automatically retracts into the transparent sleeve 03, thus completing the unlocking action.

[0079] The ratchet 24 is provided with a plurality of locking teeth, which can accurately and quantitatively adjust the rotation angle of the large rotating shaft 16, thereby achieving quantitative and fine lifting height of the blade 02 relative to the transparent sleeve 03, and the lifting height can be locked and adjusted.

[0080] Embodiment 2:

[0081] Figures 18 to 25 This is a schematic diagram of Example 2, which is specifically described as follows:

[0082] The cutting device includes a transparent sleeve 03, which is made of transparent resin material by traditional processing methods, preferably injection molding. The front end of the transparent sleeve 03 has a notch for storing the blade 02. The front end of the transparent sleeve 03 is a rounded arc shape, which is beneficial to avoid tissue damage when inserting the tissue and is more convenient for instrument insertion.

[0083] like Fig.18 As shown, the transparent sleeve 03 is connected to the operating handle formed by the upper shell 05 and the lower shell 06 of the operating handle, and is fixed by means of structural limit clamping or glue bonding. The upper shell 05 and the lower shell 06 of the operating handle are made of resin material and connected together by traditional clamping, bonding or ultrasonic welding.

[0084] like Figures 19 to 24As shown, a pressing block 0503 and a movable block 0502 are installed in the upper shell 05 of the operating handle, and the sliding inclined surface 05021 of the movable block 0502 and the surface shape of the pressing block 0503 are matched and fitted;

[0085] The movable block 0502 includes a button connecting rod 05022, a bevel tooth 05024, and a spring guide rod 05023. The button 25 is installed on the button connecting rod 05022. The bevel tooth 05024 cooperates with the pawl 17. The spring guide rod 05023 matches the spring 26. The spring 26 is installed in a cylindrical boss hole in the upper shell 05 of the operating handle.

[0086] The pawl 17 includes a limit block 1705 , and the limit block 1705 matches with the oblique tooth 05024 to achieve unidirectional limiting of the movable block 0502 .

[0087] The pawl 17 also includes a mounting groove 1706 and a rotating shaft 1707 for mounting an elastic member and mounting the pawl 17 and the elastic member together with the dial button 25 .

[0088] The front end of the pressing block 0503 is connected with a push rod 19, and the push rod 19 and the blade 02 are connected together by shaft rotation. A spring 27 is installed on one side of the pressing block 0503 for returning the position of the pressing block 0503.

[0089] During specific use: press the button 25, the movable block 0502 moves along the pressing direction of the button 25, at this time, the inclined surface 05021 of the slider of the movable block 0502 pushes the pressing block 0503 to move forward, and the oblique tooth 05024 on the other side of the movable block 0502 moves the ratchet 17; the pressing block 0503 pushes the push rod 19 to move forward, driving the blade 02 to extend out of the transparent sleeve 03 along the rotating shaft. At this time, due to the reverse direction limiting function of the limit block 1705 on the ratchet 17, the blade 02 extending out of the transparent sleeve 03 cannot be retracted, thereby realizing automatic control of the cutting amount without the operator having to press the button all the time to cut.

[0090] When the surgical incision is completed or the cutting depth is to be adjusted, the dial button 04 is turned, and the dial button 04 drives the ratchet 17 to rotate, so that the limit block 1705 and the bevel tooth 05024 are separated, and the blade 02 is pushed back into the transparent sleeve 03 and the button 25 is reset through the joint action of the spring 1 26 and the spring 2 27. The button 25 is pressed again, and the specific lifting height of the blade is determined by observing the lifting amount of the blade 02 or by judging the lumpy sound of the ratchet 17 or by the mark on the operating handle, so that the cutting depth can be accurately determined.

[0091] like Figures 25-26As shown, the device also includes an arthroscope 28 guide structure, which is composed of a right inner liner tube 2801 and a left inner liner tube 2802, which can be connected together by bonding, ultrasonic welding or other commonly used processes in the mechanical field, and plays a guiding role when the arthroscope is inserted into the device.

[0092] like Fig. 27 As shown, in this embodiment, the vertical movement of the movable block 0502 is converted into the horizontal movement of the pressing block 0503 through the friction of the inclined plane. By adjusting the angle of the inclined plane, the value change of L1:L2 can be achieved. The value of L1:L2 must be greater than 1 to achieve the displacement amplification effect, that is, a larger movement stroke of the movable block 0502 can achieve a smaller movement stroke of the pressing block 0503, so that the activity of the pressing block 0503 can be finely adjusted.

[0093] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A cutting device for soft tissue release surgery, comprising a blade, a transparent sleeve, a push rod, and an operating handle. Features: The operating handle comprises an upper shell and a lower shell, wherein a friction motion structure is arranged in the operating handle composed of the upper shell and the lower shell, wherein the friction motion structure comprises an active member and a driven member, wherein the active member and the driven member are in friction abutment with each other, wherein one end of the push rod is connected to the driven member, and the other end is rotationally connected to the blade, wherein the active member pushes the driven member to move, and the driven member drives the push rod to move forward and backward in a straight line, and the movement of the push rod is transmitted to the blade through the rotating shaft, thereby realizing the lifting or retraction of the blade from the transparent sleeve; A one-way limiting structure is also provided in the operating handle, and the one-way limiting structure includes a ratchet and a pawl. The ratchet is adapted to the active part in the friction motion structure. The ratchet is provided with a helical tooth structure, and cooperates with the pawl to achieve one-way limiting. The pawl is individually controlled by an unlocking device on the operating handle.

2. A cutting device for soft tissue release surgery according to claim 1, characterized in that: The pawl is provided with a torsion spring structure for automatically resetting the pawl, and at least one of the active member and the driven member of the friction motion structure includes an elastic force structure for resetting the position of the active member and the driven member.

3. The cutting device for soft tissue release surgery according to claim 1, characterized in that: The operating handle contains a guiding structure inside, which is tapered as a whole and fixedly connected to the upper shell or the lower shell constituting the operating handle, and is used to guide the insertion of the arthroscope.

4. The cutting device for soft tissue release surgery according to claim 1, characterized in that: The surface of the transparent sleeve is marked with scales for indicating the length. One side of the front end of the transparent sleeve is open for lifting the blade. The front end of the transparent sleeve is also provided with an axial hole, in which an axis is arranged for connecting the blade so that the blade rotates around the axis.

5. The cutting device for soft tissue release surgery according to claim 4, characterized in that: The push rod is located in the transparent sleeve, and the push rod performs reciprocating linear motion along the inner cavity of the transparent sleeve. A blade rotation groove is provided above the head end of the push rod, and the blade rotates in the blade rotation groove.

6. The cutting device for soft tissue release surgery according to claim 1, characterized in that: The active part of the friction motion structure is a cam, and the driven part is a slider. The cam presses the slider through rolling friction to achieve the forward and backward movement of the slider. A shaft is passed through the middle of the cam, and a ratchet is also installed on the shaft. The cam and the ratchet are driven to rotate by the shaft to achieve the movement of the driven part and the synchronous locking of the position.

7. The cutting device for soft tissue release surgery according to claim 1, characterized in that: A through hole is provided at the center of the driven member of the friction motion structure for passing an arthroscope, and a spring reset structure is provided on one side of the driven member.

8. The cutting device for soft tissue release surgery according to claim 1, characterized in that: A U-shaped groove is arranged on one side of the operating handle, and bumps are symmetrically arranged on the U-shaped groove for limiting the position of the arthroscope.

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