Medical curette device

Abstract

The invention provides a medical curette device, comprising: a housing having an accommodating cavity; the control assembly is rotatably connected with the shell, and part of the control assembly is located in the containing cavity. The outer pipe is connected with the shell and is communicated with the accommodating cavity; the inner rod movably penetrates through the outer pipe, and the near end of the inner rod is connected with the control assembly; the curette head is rotationally arranged at the far end of the outer tube and is connected with the far end of the inner rod; the locking assembly is connected with the shell and used for locking the inner rod. In the working state, the locking assembly is controlled to unlock the inner rod, and acting force is applied to the control assembly to drive the inner rod to move in the axial direction of the control assembly and push the curette head to rotate to adjust the angle. According to the medical curette device, the locking mode of the locking assembly and the inner rod is simple, the unlocking state and the locking state can be rapidly switched, rapid gearless switching is achieved, the operation convenience is improved, the curette head can be freely adjusted within the angle range of 0-90 degrees, the operation efficiency is improved, and the operation risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a medical scraper. Background Art

[0002] Percutaneous kyphoplasty (PKP) is a procedure that precisely punctures the diseased vertebra under image guidance, uses balloon dilation to restore the compressed vertebra to a certain height, and then injects bone cement into the vertebra to achieve the purpose of treating vertebral compression fractures caused by osteoporosis and vertebral metastatic tumors. Because of its characteristics of small surgical trauma, short time, low risk, few complications, fast postoperative recovery and obvious treatment effect, it has gradually become the mainstream minimally invasive interventional surgery for the treatment of vertebral compression fractures. The commonly used balloon dilatation catheter in PKP surgery is made of polymer materials, and its hardness has certain limitations. When the patient's osteoporosis is not very serious, it will cause the balloon-formed cavity volume to be insufficient or bone spurs in the vertebral body will puncture the balloon, resulting in poor surgical results or increased surgical time and cost.

[0003] In order to solve the above problems, a scraper is currently used to scrape the cancellous bone in the vertebral body before the balloon dilatation catheter enters the vertebral body to form a cavity of a certain volume. The scraper expands the beneficiary population of balloon vertebral dilatation technology, improves the success rate of balloon dilatation catheter cavity formation, greatly reduces the chance of bone spurs piercing the balloon, and the device is simple and convenient to operate and has high safety. These advantages will surely lead to its widespread promotion.

[0004] The scrapers currently on the market have limited adjustment of the head angle, generally have fixed angle gears, and the gear shifting operation is inconvenient, which affects the scraping efficiency of the cancellous bone in the vertebral body and increases the risk of surgery. Summary of the invention

[0005] The purpose of the present invention is to provide a medical scraper, which solves the problem of inconvenient angle adjustment of the scraper head during use, improves scraping efficiency, speeds up the operation process, and reduces the risk of the operation.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a medical scraper, comprising: A housing having a receiving cavity; A control assembly is rotatably connected to the housing, and a portion of the control assembly is located in the accommodating cavity; An outer tube connected to the outer shell and communicated with the accommodating cavity; An inner rod, movably inserted into the outer tube, wherein the proximal end of the inner rod is connected to the control assembly; A scraper head is rotatably disposed at the distal end of the outer tube and connected to the distal end of the inner rod; A locking assembly, connected to the housing, for locking the inner rod; In the working state, the locking assembly is controlled to unlock the inner rod, and a force is applied to the control assembly to drive the inner rod to move along its axial direction and push the scraper head to rotate and adjust the angle. In some embodiments, the control assembly includes a control handle, the control handle is rotatably connected to the housing, the control handle has a clamping portion, and the clamping portion is located in the accommodating cavity; The proximal end of the inner rod is provided with a reduced diameter portion used in cooperation with the clamping portion; When a force is applied to the control handle, the control handle rotates, and the clamping portion located at the reduced diameter portion pushes the inner rod to move.

[0007] In some embodiments, a card slot is provided on the card connection portion; The diameter of the reduced diameter portion is smaller than the diameter of the proximal end of the inner rod, and the reduced diameter portion is movably arranged in the clamping groove.

[0008] In some embodiments, the control assembly further includes a spring sheet, one end of which is connected to the control handle, and the other end of which is connected to the housing; When the force applied to the control handle is cancelled, the spring sheet provides elastic force to drive the control handle to reset.

[0009] In some embodiments, the locking assembly includes an unlocking handle and a locking member; The outer wall of the inner rod is provided with a locking groove along its axial direction; The locking member is rotatably disposed in the accommodating cavity, and the locking member has a locking protrusion, and the locking protrusion cooperates with the locking groove to lock the inner rod; The unlocking handle is rotatably disposed on the housing, and one end of the unlocking handle is located in the accommodating cavity and connected to the locking member; When a force is applied to the unlocking handle, the unlocking handle rotates and drives the locking member to rotate, so that the locking protrusion is separated from the locking groove.

[0010] In some embodiments, the locking assembly further includes a transmission rod, one end of which is rotatably connected to one end of the unlocking handle, and the other end of which is rotatably connected to the locking member.

[0011] In some embodiments, the locking assembly further comprises a first elastic member; A mounting groove is provided in the accommodating cavity, and the mounting groove faces the locking member; The first elastic member is disposed in the installation groove, and one end thereof abuts against the locking member; When the force applied to the unlocking handle is released, the first elastic member provides an elastic force to drive the locking member to move toward the locking groove, so that the locking protrusion cooperates with the locking groove to lock.

[0012] In some embodiments, the locking assembly includes a second elastic member; One end of the second elastic member is connected to the unlocking handle, and the other end is connected to the housing; When the force applied to the unlocking handle is cancelled, the second elastic member provides an elastic force to drive the unlocking handle to return to its original position.

[0013] In some embodiments, the medical scraper further comprises a third elastic member located in the accommodating cavity; The inner rod has an abutment portion; The third elastic member is sleeved on the inner rod, and one end of the third elastic member abuts against the abutting portion, and the other end abuts against the proximal end surface of the outer tube.

[0014] In some embodiments, the medical scraper further comprises a connecting piece passing through the outer tube; The distal end of the connecting member is connected to the scraper head, and the proximal end of the connecting member is connected to the distal end of the inner rod.

[0015] In some embodiments, the distal end of the inner rod has a first receiving groove; The connecting member is a connecting rod, the proximal end of the connecting rod is arranged in the first receiving groove and connected to the inner rod, and the distal end of the connecting rod is provided with a second receiving groove; The proximal end of the scraper head is arranged in the second receiving groove and connected to the connecting rod.

[0016] In some embodiments, the first receiving groove is a U-shaped groove structure; The proximal end of the connecting rod is connected to the U-shaped groove structure through a connecting pin.

[0017] In some embodiments, both side walls of the proximal end of the connecting rod are planes to increase the contact area with the inner wall of the outer tube.

[0018] In some embodiments, the first accommodating groove is a square groove structure, the proximal end of the connecting rod is a square protrusion, and the square protrusion can be embedded in the square groove structure and have an interference fit with the square groove structure.

[0019] In some embodiments, the first receiving groove is a cylindrical groove having an internal thread structure, and the proximal outer side wall of the connecting rod is provided with an external thread structure that cooperates with the internal thread structure.

[0020] In some embodiments, the connecting member is a traction wire; A first connecting groove and a second connecting groove are formed on the side wall of the distal end of the inner rod, the first connecting groove and the second connecting groove are respectively located on both sides of the inner rod, and parts of the first connecting groove and the second connecting groove extend along the circumferential direction of the inner rod, and the other parts extend along the radial direction of the inner rod; A connecting hole is provided at the proximal end of the scraper head; The traction steel wire passes through the connection hole, one end of which is connected to the first connection groove, and the other end of which is connected to the second connection groove.

[0021] In some embodiments, the connecting member is a traction wire; A groove is formed at the distal end of the inner rod, and abutment holes are formed on the inner wall of the groove. A connecting hole is provided at the proximal end of the scraper head; The traction steel wire passes through the connecting hole, and both ends of the traction steel wire are located in the groove and are respectively connected to the corresponding abutting holes.

[0022] In some embodiments, a third receiving groove is provided at the distal end of the outer tube; The proximal end of the scraper head has a flat convex portion, a rotation hole is formed on the flat convex portion, and the flat convex portion is rotatably disposed in the third accommodating groove through the rotation hole.

[0023] In some embodiments, the outer tube includes a support tube and a cavity tube, the proximal end of the support tube has a protruding step, the protruding step is embedded in the distal end of the cavity tube and connected to the cavity tube, and the proximal end of the cavity tube is fixedly connected to the outer shell and communicated with the accommodating cavity; The third accommodating groove is arranged at the distal end of the supporting tube.

[0024] The medical scraper provided by the embodiment of the present invention has at least one of the following technical effects: 1. The scraper head can be adjusted in any angle within the range of 0-90°.

[0025] 2. The medical scraper uses a locking assembly and an inner rod to lock the scraper, which can quickly switch between unlocked and locked states, achieving fast, gearless switching, further increasing the convenience of operation, while being able to maintain a stable locked state to carry out scraper operations.

[0026] 3. The control assembly and the inner rod cooperate in the transmission mode. The scraper head is connected to the inner rod through a connector. A press-in connection structure and an embedded connection structure are adopted, which eliminates or reduces the welding area, simplifies the processing procedure, and reduces the damage to the oxide layer of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A front view of a medical scraper according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the internal structure at A in the middle; Figure 3 A schematic diagram of the structure of the outer tube, inner rod, scraper head, third elastic member and control handle after being assembled in the embodiment provided by the present invention; Figure 4 A schematic structural diagram of another embodiment of the present invention in which a scraper head is connected to an inner rod via a connecting piece; Figure 5 An exploded view of a scraper head, a connecting member and an inner rod according to another embodiment of the present invention; Figure 6 An exploded view of a scraper head, a connecting piece and an inner rod according to another embodiment of the present invention Figure 7 A schematic diagram of the structure of the embodiment of the present invention after the scraper head is connected to the connecting piece; Figure 8 A schematic diagram of a portion of the structure at the distal end of the inner rod in an embodiment provided by the present invention; Fig. 9 A schematic diagram of the structure of another embodiment of the present invention, in which a scraper head is connected to an inner rod through a connecting piece; Fig.10 for Fig. 9 The enlarged view of point B in the middle; Fig.11 A schematic diagram of the structure of a connecting member in an embodiment provided by the present invention; Fig.12 This is a schematic structural diagram of a support tube according to an embodiment of the present invention.

[0028] Reference numerals: Shell 1, accommodating cavity 11, mounting groove 12, mounting hole 13, limiting groove 14, control assembly 2, control handle 21, clamping portion 211, clamping groove 212, spring piece 22, outer tube 3, support tube 31, third accommodating groove 311, protruding step 312, cavity tube 32, inner rod 4, reduced diameter portion 41, locking groove 42, abutment portion 43, first accommodating groove 44, first connecting groove 45, second connecting groove 46, groove 47, abutment hole 471, square boss 48, scraper head 5, connecting hole 51, flat convex portion 52, rotating hole 53, locking assembly 6, unlocking handle 61, locking member 62, locking convex portion 621, transmission rod 63, first elastic member 64, second elastic member 65, third elastic member 7, connecting member 8, second accommodating groove 81, limiting block 9. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Unless otherwise specified, the "connection" described in this article can be a direct connection or an indirect connection, that is, connected through an intermediate.

[0030] As used herein, the term "distal end" refers to the end that is away from the operator and closer to the patient; the term "proximal end" refers to the end that is closer to the operator and away from the patient.

[0031] In view of the problems existing in the prior art, an embodiment of the present invention provides a medical scraper, referring to Figure 1 and Figure 2 As shown, the medical scraper includes a shell 1, a control component 2, an outer tube 3, an inner rod 4, a scraper head 5 and a locking component 6. The shell 1 has a accommodating chamber 11, the control component 2 is rotatably connected to the shell 1, and part of the control component 2 is located in the accommodating chamber 11. The proximal end of the outer tube 3 is fixedly connected to the shell 1 and communicates with the accommodating chamber 11. The inner rod 4 is movably arranged in the outer tube 3, and the proximal end of the inner rod 4 is connected to the control component 2. When the control component 2 rotates, the inner rod 4 can be driven to move along its axial direction. The scraper head 5 is rotatably arranged at the distal end of the outer tube 3 and is connected to the distal end of the inner rod 4. The locking component 6 is connected to the shell 1 and is used to lock the inner rod 4.

[0032] In the working state, the medical staff controls the locking assembly 6 to unlock the inner rod 4, and then applies a force to the control assembly 2 to drive the inner rod 4 to move along its axial direction and push the curette head 5 to rotate and adjust the angle. In this embodiment, the locking method of the locking assembly 6 and the inner rod 4 is simple, and the unlocking and locking states can be quickly switched, realizing fast non-shift switching, increasing the convenience of operation, and the curette head 5 can be arbitrarily adjusted within the angle range of 0-90°, thereby improving the efficiency of the operation and reducing the risk of the operation.

[0033] refer to Figure 1 to Figure 2As shown, in some embodiments, the control assembly 2 includes a control handle 21, which is rotatably connected to the housing 1, and has a clamping portion 211, which is located in the accommodating cavity 11, and the proximal end of the inner rod 4 is provided with a reduced diameter portion 41 used in conjunction with the clamping portion 211.

[0034] When a rightward force is applied to the control handle 21, the control handle 21 rotates, and the clamping portion 211 located at the reduced diameter portion 41 pushes the inner rod 4 to move leftward, thereby driving the scraper head 5 to adjust the angle. When adjusted to a suitable angle, the locking assembly 6 locks the inner rod 4.

[0035] In this embodiment, a rotating pin is provided in the accommodating cavity 11, and a through hole is provided on the control handle 21. The through hole cooperates with the rotating pin, so that the control handle 21 can rotate along the rotating pin after receiving a rightward force.

[0036] Furthermore, combined with Figure 3 As shown, the clamping portion 211 is provided with a clamping slot 212, and the clamping slot 212 is a U-shaped slot structure. The diameter of the reduced diameter portion 41 is smaller than the diameter of the proximal end of the inner rod 4, and the reduced diameter portion 41 can be movably embedded in the clamping slot 212.

[0037] In this embodiment, the clamping portion 211 is located at the upper end of the control handle 21, and the clamping groove 212 provided on the clamping portion 211 is in a U-shaped groove structure. The reduced diameter portion 41 is close to the proximal end of the inner rod 4, and the diameter of the reduced diameter portion 41 is smaller than the diameter of the proximal end region of the inner rod 4, so that the reduced diameter portion 41 can be embedded in the clamping portion 211 and maintain a certain gap with the clamping portion 211. By adopting an embedded connection structure to connect the control handle 21 to the inner rod 4, the processing method is simple, and the welding area is reduced, thereby reducing the damage to the surface oxide layer of the parts in the instrument.

[0038] refer to Figure 1 and Figure 2 As shown, in some embodiments, the control component 2 further includes a spring 22 , one end of the spring 22 is connected to the control handle 21 , and the other end is connected to the housing 1 .

[0039] When the force applied to the control handle 21 is cancelled, the spring sheet 22 provides elastic force to drive the control handle 21 to return to its original position.

[0040] In this embodiment, the spring sheet 22 is an elastic connecting sheet, one end of the spring sheet 22 is fixedly connected to the control handle 21, and the other end of the spring sheet 22 is rotatably connected to a pin located in the accommodating cavity 11. When a rightward force is applied to the control handle 21, the spring sheet 22 will be compressed, so when the force applied to the control handle 21 is cancelled, the spring sheet 22 provides elastic force to drive the control handle 21 to reset.

[0041] refer to Figures 1 to 3 As shown, in some embodiments, the inner rod 4 has an abutment portion 43, and the abutment portion 43 is arranged close to the reduced diameter portion 41. The medical scraper provided by the present invention also includes a third elastic member 7 located in the accommodating cavity 11, and the third elastic member 7 is sleeved on the inner rod 4, and one end of the third elastic member 7 abuts against the abutment portion 43, and the other end abuts against the proximal end surface of the outer tube 3.

[0042] In this embodiment, the third elastic member 7 is a spring, and by arranging the third elastic member 7 between the abutment portion 43 and the end surface of the proximal end of the outer tube 3, a certain damping effect is achieved, and the inner rod 4 can also be reset. Because when a rightward force is applied to the control handle 21, the control handle 21 will drive the inner rod 4 to move leftward and compress the third elastic member 7, so when the force applied to the control handle 21 is cancelled, the third elastic member 7 will push the inner rod 4 to reset.

[0043] Continue to refer Figures 1 to 3 As shown, in some embodiments, the outer wall of the inner rod 4 is provided with a locking groove 42 along its axial direction, and the locking assembly 6 includes an unlocking handle 61 and a locking member 62, wherein the locking member 62 is rotatably disposed in the accommodating cavity 11, and the locking member 62 has a locking protrusion 621, and the locking protrusion 621 cooperates with the locking groove 42 to lock the inner rod 4. The unlocking handle 61 is rotatably disposed on the outer shell 1, and one end of the unlocking handle 61 is located in the accommodating cavity 11 and connected to the locking member 62.

[0044] When a force is applied to the unlocking handle 61 , the unlocking handle 61 rotates and drives the locking member 62 to rotate, so that the locking protrusion 621 is separated from the locking groove 42 .

[0045] In this embodiment, the locking member 62 is a connecting rod with teeth, the locking protrusion 621 is a tooth structure protruding from the connecting rod, the locking member 62 is rotatably connected to the pin located in the accommodating cavity 11, and the locking groove 42 is a groove meshed with the tooth structure. The unlocking handle 61 is rotatably connected to the pin located in the accommodating cavity 11, and one end of the unlocking handle 61 is transmission-connected to the locking member 62. Therefore, when a rightward force is applied to the unlocking handle 61, the unlocking handle 61 rotates along the pin and drives the locking member 62 to rotate along the pin, so that the locking protrusion 621 is separated from the locking groove 42, thereby completing the unlocking.

[0046] Furthermore, the locking assembly 6 further includes a transmission rod 63 , one end of the transmission rod 63 is rotatably connected to one end of the unlocking handle 61 , and the other end of the transmission rod 63 is rotatably connected to the locking member 62 .

[0047] In this embodiment, the transmission rod 63 is rotatably connected to the unlocking handle 61 and the locking member 62 through two rotating shafts, so as to realize the transmission connection between the unlocking handle 61 and the locking member 62 .

[0048] In some embodiments, the locking assembly 6 also includes a first elastic member 64 , a mounting groove 12 is provided in the accommodating cavity 11 , the mounting groove 12 faces the locking member 62 , the first elastic member 64 is provided in the mounting groove 12 , and one end abuts against the locking member 62 .

[0049] When the force applied to the unlocking handle 61 is released, the first elastic member 64 provides elastic force to drive the locking member 62 to rotate, so that the locking protrusion 621 cooperates with the locking groove 42 to lock.

[0050] In this embodiment, the mounting groove 12 is arranged close to the locking member 62 and is located above the locking member 62. The first elastic member 64 is a spring. By arranging the first elastic member 64 in the mounting groove 12 and making one end of it abut against the locking member 62, when the force applied to the unlocking handle 61 is released, the locking member 62 can be quickly reset and complete the locking of the inner rod 4.

[0051] Furthermore, the locking assembly 6 includes a second elastic member 65 , one end of the second elastic member 65 is connected to the unlocking handle 61 , and the other end of the second elastic member 65 is connected to the housing 1 .

[0052] When the force applied to the unlocking handle 61 is cancelled, the second elastic member 65 provides elastic force to drive the unlocking handle 61 to return to its original position.

[0053] In this embodiment, the second elastic member 65 is a spring. A hole is formed on the unlocking handle 61 . One end of the spring is connected to one of the holes, and the other end is connected to the extension rod in the accommodating cavity 11 .

[0054] refer to Figure 3 and Figure 4 As shown, in some embodiments, the medical scraper further includes a connector 8 inserted into the outer tube 3 , the distal end of the connector 8 is connected to the scraper head 5 , and the proximal end of the connector 8 is connected to the distal end of the inner rod 4 .

[0055] Specifically, the distal end of the inner rod 4 has a first receiving groove 44, and the first receiving groove 44 is a U-shaped groove structure. The connecting member 8 is a connecting rod, and the proximal end of the connecting rod is arranged in the first receiving groove 44 and connected to the inner rod 4. The distal end of the connecting rod is provided with a second receiving groove 81, and the second receiving groove 81 is also a U-shaped groove structure. The proximal end of the scraper head 5 is arranged in the second receiving groove 81 and connected to the connecting rod.

[0056] In this embodiment, the proximal end of the scraper head 5 is connected to the second receiving groove 81 through a connecting pin, and the proximal end of the connecting member 8 is connected to the first receiving groove 44 through another connecting pin. In addition, in this embodiment, the connecting member 8 is a connecting rod. Since the connecting rod has strong rigidity, stable force transmission, and is not easy to deform, the scraper head 5 is connected to the distal end of the inner rod 4 by using the connecting rod, thereby ensuring the reliability of the connection between the two.

[0057] Furthermore, both side walls of the proximal end of the connecting rod are planes, so as to increase the contact area with the inner wall of the outer tube 3 .

[0058] In this embodiment, the two side walls of the proximal end of the connecting rod are made flat to increase the contact area between the connecting rod and the inner wall of the outer tube 3, so that the connecting rod remains parallel to the inner wall of the outer tube 3 during movement, thereby ensuring stability during force transmission.

[0059] refer to Figure 5 As shown, in some specific embodiments, the first receiving groove 44 is a square groove structure, the proximal end of the connecting member 8 is a square protrusion, the square protrusion and the first receiving groove 44 can be interference fit, and the proximal end of the connecting member 8 is embedded in the first receiving groove 44 and fixedly connected to the inner rod 4. This square embedding connection method not only saves assembly time, but also does not require high product processing dimensional accuracy.

[0060] refer to Figure 6As shown, in some other specific embodiments, the first receiving groove 44 is a cylindrical groove, an internal thread structure is provided in the first receiving groove 44, and an external thread structure matching the internal thread structure is provided on the proximal outer wall of the connecting member 8, and the proximal end of the connecting member 8 is threadedly connected to the first receiving groove 44 to achieve fixed connection with the inner rod 4. This threaded connection mode has good stability and convenience of assembly and disassembly.

[0061] refer to Figure 7 and Figure 8 As shown, in some embodiments, the connecting member 8 is a traction wire. The side wall at the distal end of the inner rod 4 is provided with a first connection groove 45 and a second connection groove 46, the first connection groove 45 and the second connection groove 46 are respectively located on both sides of the inner rod 4 and are arranged opposite to each other, and parts of the first connection groove 45 and the second connection groove 46 extend along the axial direction of the inner rod 4, and the other parts extend along the radial direction of the inner rod 4, so that the first connection groove 45 and the second connection groove 46 are both in an "L"-shaped structure. The proximal end of the scraper head 5 is provided with a connection hole 51, and after the traction wire passes through the connection hole 51, the two ends are bent, and one end is connected to the first connection groove 45, and the other end is connected to the second connection groove 46.

[0062] Furthermore, the distal end of the inner rod 4 has a square boss 48, and the square boss 48 is located on the inner side of the traction wire.

[0063] In this embodiment, by providing a square boss 48 on the inner side of the traction wire, the traction wire is restricted, and the deformation of the traction wire caused by the scraper head 5 during the torsion force process is effectively prevented, thereby improving the reliability of the traction wire used to connect the scraper head 5 and the inner rod 4. In addition, the traction wire is located inside the outer tube 3, and the inner wall of the outer tube 3 can effectively restrict the movement and deformation of the traction wire, ensuring stable force transmission.

[0064] refer to Figures 9 to 11 As shown, in some embodiments, the connecting member 8 is also a traction wire. A groove 47 is provided at the distal end of the inner rod 4, and an abutment hole 471 is provided on the inner wall of the groove 47. A connection hole 51 is provided at the proximal end of the scraper head 5, and the traction wire passes through the connection hole 51. Both ends of the traction wire are located in the groove 47 and are connected to the corresponding abutment holes 471 respectively.

[0065] In this embodiment, when installing the traction steel wire, first pass the traction steel wire through the connecting hole 51, then bend the traction steel wire so that the two ends of the traction steel wire are close together, then bend the two ends of the traction steel wire outward to form an "L"-shaped structure, and finally apply force to the two ends of the traction steel wire so that the two ends of the traction steel wire are further close together and inserted into the groove 47. After the force is removed, the two ends of the traction steel wire are opened and inserted into the corresponding abutment holes 471 respectively, so that the traction steel wire is connected to the inner rod 4.

[0066] refer to Figure 1 , Fig.10 and Fig.12 As shown, in some embodiments, the distal end of the outer tube 3 is provided with a third receiving groove 311, the proximal end of the scraper head 5 has a flat convex portion 52, and the flat convex portion 52 is provided with a rotating hole 53. The flat convex portion 52 is rotatably arranged in the third receiving groove 311 through the rotating hole 53.

[0067] In this embodiment, the third receiving groove 311 is a "U"-shaped groove structure and is connected to the outer tube 3. The flat protrusion 52 is located in the third receiving groove 311, and the fixing pin passes through the rotation hole 53 and is welded to the side wall of the third receiving groove 311, so that the scraper head 5 can rotate along the fixing pin after being subjected to force.

[0068] refer to Figure 1 and Fig.12 In some embodiments, the outer tube 3 includes a support tube 31 and a cavity tube 32, the proximal end of the support tube 31 has a protruding step 312, the protruding step 312 is embedded in the distal end of the cavity tube 32 and connected to the cavity tube 32, the proximal end of the cavity tube 32 is fixedly connected to the outer shell 1 and communicated with the accommodating cavity 11, and the third accommodating groove 311 is provided at the distal end of the support tube 31.

[0069] In this embodiment, by setting a protruding step 312 at the proximal end of the support tube 31, a waist-shaped hole structure is formed at the proximal end of the support tube 31, which can be used to limit the activity space of the connector 8 and ensure that the connector 8 can move stably. In addition, after the protruding step 312 is embedded in the distal end of the cavity tube 32, it can be fixedly connected to the cavity tube 32 by welding. It should be noted that the setting of the protruding step 312 facilitates the circumferential welding after the support tube 31 and the cavity tube 32 are aligned. In some embodiments, the medical scraper also includes a limit block 9, and the housing 1 is also provided with a mounting hole 13 and a limit groove 14. The limit block 9 is provided with a through hole, and the limit block 9 is sleeved on the outer tube and fixed to the outer tube 3 by annular welding at its through hole. The proximal end of the outer tube 3 is set in the mounting hole 13, and the limit block 9 is fixed in the limit groove 14, and the proximal end surface of the outer tube 3 abuts against the third elastic member 7.

[0070] The use process of the scraper provided by the embodiment of the present invention is as follows: After the scraper enters the surgical position, the operator applies force to the unlocking handle 61, the inner rod 4 is in the unlocked state, and applies external force to the control handle 21, the external force is transmitted to the inner rod 4, and the inner rod 4 drives the scraper head 5 to freely adjust the angle of the scraper head as needed. After releasing the unlocking handle 61, the scraper is in the locked state, and the scraper operation can be carried out stably. When the angle of the scraper head needs to be adjusted, repeat the above action to achieve free adjustment and scraper operation within the range of 0-90 degrees.

[0071] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A medical scraper, characterized in that: include: A housing having a receiving cavity; A control assembly is rotatably connected to the housing, and a portion of the control assembly is located in the accommodating cavity; An outer tube connected to the outer shell and communicated with the accommodating cavity; An inner rod, movably inserted into the outer tube, wherein the proximal end of the inner rod is connected to the control assembly; A scraper head is rotatably disposed at the distal end of the outer tube and connected to the distal end of the inner rod; A locking assembly, connected to the housing, for locking the inner rod; In the working state, the locking assembly is controlled to unlock the inner rod, and a force is applied to the control assembly to drive the inner rod to move along its axial direction and push the scraper head to rotate and adjust the angle.

2. The medical scraper according to claim 1, characterized in that: The control assembly comprises a control handle, the control handle is rotatably connected to the housing, the control handle has a clamping portion, and the clamping portion is located in the accommodating cavity; The proximal end of the inner rod is provided with a reduced diameter portion used in cooperation with the clamping portion; When a force is applied to the control handle, the control handle rotates, and the clamping portion located at the reduced diameter portion pushes the inner rod to move.

3. The medical scraper according to claim 2, characterized in that: The clamping portion is provided with a clamping slot; The diameter of the reduced diameter portion is smaller than the diameter of the proximal end of the inner rod, and the reduced diameter portion is movably arranged in the clamping groove.

4. The medical scraper according to claim 2, characterized in that: The control assembly further includes a spring sheet, one end of which is connected to the control handle, and the other end of which is connected to the housing; When the force applied to the control handle is cancelled, the spring sheet provides elastic force to drive the control handle to reset.

5. The medical scraper according to any one of claims 1 to 4, characterized in that: The locking assembly comprises an unlocking handle and a locking member; The outer wall of the inner rod is provided with a locking groove along its axial direction; The locking member is rotatably disposed in the accommodating cavity, and the locking member has a locking protrusion, and the locking protrusion cooperates with the locking groove to lock the inner rod; The unlocking handle is rotatably disposed on the housing, and one end of the unlocking handle is located in the accommodating cavity and connected to the locking member; When a force is applied to the unlocking handle, the unlocking handle rotates and drives the locking member to rotate, so that the locking protrusion is separated from the locking groove.

6. The medical scraper according to claim 5, characterized in that: The locking assembly also includes a transmission rod, one end of which is rotatably connected to one end of the unlocking handle, and the other end of which is rotatably connected to the locking member.

7. The medical scraper according to claim 5, characterized in that: The locking assembly further includes a first elastic member; A mounting groove is provided in the accommodating cavity, and the mounting groove faces the locking member; The first elastic member is disposed in the installation groove, and one end thereof abuts against the locking member; When the force applied to the unlocking handle is released, the first elastic member provides an elastic force to drive the locking member to move toward the locking groove, so that the locking protrusion cooperates with the locking groove to lock.

8. The medical scraper according to claim 5, characterized in that: The locking assembly includes a second elastic member; One end of the second elastic member is connected to the unlocking handle, and the other end is connected to the housing; When the force applied to the unlocking handle is cancelled, the second elastic member provides an elastic force to drive the unlocking handle to return to its original position.

9. The medical scraper according to any one of claims 1 to 4, characterized in that: Also includes a third elastic member located in the accommodating cavity; The inner rod has an abutment portion; The third elastic member is sleeved on the inner rod, and one end of the third elastic member abuts against the abutting portion, and the other end abuts against the proximal end surface of the outer tube.

10. The medical scraper according to claim 1, characterized in that: Also includes a connecting piece passing through the outer tube; The distal end of the connecting member is connected to the scraper head, and the proximal end of the connecting member is connected to the distal end of the inner rod.

11. The medical scraper according to claim 10, characterized in that: The distal end of the inner rod has a first receiving groove; The connecting member is a connecting rod, the proximal end of the connecting rod is arranged in the first receiving groove and connected to the inner rod, and the distal end of the connecting rod is provided with a second receiving groove; The proximal end of the scraper head is arranged in the second receiving groove and connected to the connecting rod.

12. The medical scraper according to claim 11, characterized in that: The first receiving groove is a U-shaped groove structure; The proximal end of the connecting rod is connected to the U-shaped groove structure through a connecting pin.

13. The medical scraper according to claim 12, characterized in that: The two side walls of the proximal end of the connecting rod are planes, so as to increase the contact area with the inner wall of the outer tube.

14. The medical scraper according to claim 11, characterized in that: The first accommodating groove is a square groove structure, and the proximal end of the connecting rod is a square protrusion. The square protrusion can be embedded in the square groove structure and has an interference fit with the square groove structure.

15. The medical scraper according to claim 11, characterized in that: The first accommodating groove is a cylindrical groove having an internal thread structure, and the proximal outer side wall of the connecting rod is provided with an external thread structure matching with the internal thread structure.

16. The medical scraper according to claim 10, characterized in that: The connecting piece is a traction wire; A first connecting groove and a second connecting groove are formed on the side wall of the distal end of the inner rod, the first connecting groove and the second connecting groove are respectively located on both sides of the inner rod, and parts of the first connecting groove and the second connecting groove extend along the circumferential direction of the inner rod, and the other parts extend along the radial direction of the inner rod; A connecting hole is provided at the proximal end of the scraper head; The traction steel wire passes through the connection hole, one end of which is connected to the first connection groove, and the other end of which is connected to the second connection groove.

17. The medical scraper according to claim 10, characterized in that: The connecting piece is a traction wire; A groove is formed at the distal end of the inner rod, and abutment holes are formed on the inner wall of the groove. A connecting hole is provided at the proximal end of the scraper head; The traction steel wire passes through the connecting hole, and both ends of the traction steel wire are located in the groove and are respectively connected to the corresponding abutting holes.

18. The medical scraper according to any one of claims 10 to 17, characterized in that: A third receiving groove is provided at the distal end of the outer tube; The proximal end of the scraper head has a flat convex portion, a rotation hole is formed on the flat convex portion, and the flat convex portion is rotatably disposed in the third accommodating groove through the rotation hole.

19. The medical scraper according to claim 18, characterized in that: The outer tube includes a support tube and a cavity tube, the proximal end of the support tube has a protruding step, the protruding step is embedded in the distal end of the cavity tube and connected to the cavity tube, and the proximal end of the cavity tube is fixedly connected to the shell and communicated with the accommodating cavity; The third accommodating groove is arranged at the distal end of the supporting tube.

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