Rotary curette

Abstract

The utility model provides a rotary curette, which relates to the technical field of medical instruments and comprises a head part, a handle, a base rod, a movable rod in sliding fit with the base rod, a curette blade body, a swing joint and a limiting structure, the handle is respectively connected with the movable rod and the base rod in a matched manner, and a user can press the handle to drive the movable rod to translate along the length direction of the base rod. The curette blade body is hinged to the base rod, the two ends of the swing joint are hinged to the curette blade body and the movable rod respectively, the movable rod moves to drive the curette blade body to rotate through the swing joint, and the curette blade body is in two-way limiting fit with the limiting structure so that the curette blade body can be parallel to the base rod by the maximum rotation angle and the minimum rotation angle of the curette blade body relative to the base rod. The device can effectively achieve rotation work and is good in using effect.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a rotary curette. Background Art

[0002] At present, conventional bone curettes are composed of a fixed curette head and a handle, which can be used to scrape tissue at the surgical site. The conventional curette head has a fixed shape and a fixed angle, and has extremely stringent requirements on the channel leading to the tissue. The channel diameter must be larger than the size of the curette head to allow the curette to smoothly penetrate into the lesion site, and the curette can only perform simple one-way scraping operations at the lesion site. If multi-directional and variable-angle scraping of tissue is required, it is necessary to replace a different type of curette for the operation.

[0003] To solve the above problems, the existing patent application number CN200680025465.6 provides a device and method for making or expanding a cavity in a patient's body. One implementation of the device includes a head, a movable rod and a handle. The head can rotate around a first axis and is configured to perform a medical procedure. The movable rod is attached to the head at the distal end and to the handle at the proximal end. The movable rod is configured to translate along a second axis substantially perpendicular to the first axis. The translation of the movable rod along the second axis causes the head to rotate around the first axis. The handle includes a lever connected to the movable rod at a first end. Pivoting the lever around a third axis causes the movable rod to translate along the second axis. In another implementation, the head translates and can include cutting portions of various configurations, including two or more fingers.

[0004] The existing devices have poor adaptability and single working conditions and cannot meet the needs of rotary cutting. Utility Model Content

[0005] The utility model aims to provide a rotary curette to solve the technical problem of large cutting angle limitation in the prior art.

[0006] In order to solve the above problems, a rotary scraper involved in the utility model adopts the following technical solutions:

[0007] The utility model provides a rotary scraper, comprising a head, a handle, a base rod, and a movable rod slidably matched with the base rod, the handle is respectively matched to connect the movable rod and the base rod, and a user can drive the movable rod to translate along the length direction of the base rod by pressing the handle, and also comprises a scraper blade body, a swing joint and a limiting structure, the scraper blade body is hinged to the base rod, and the two ends of the swing joint are respectively hinged to the scraper blade body and the movable rod, the movable rod moves to drive the scraper blade body to rotate through the swing joint, and the scraper blade body and the limiting structure are matched with each other in a two-way limiting manner, so that the maximum angle and the minimum angle of rotation of the scraper blade body relative to the base rod can make the scraper blade body parallel to the base rod.

[0008] Preferably, a groove located on the rotation path of the scraper blade is formed on the base rod, and the limiting structure includes a base rod peripheral wall or a groove top wall located on the rotation path of the scraper blade and capable of abutting against the scraper blade. When the scraper blade rotates toward the base rod until it is parallel to the base rod, the scraper blade can be matched and buckled on the groove, and the scraper blade abuts against the base rod peripheral wall or the groove top wall to prevent the scraper blade from continuing to rotate in the same direction.

[0009] Preferably, the limiting structure also includes a limiting surface located on the rotation path of the swing joint and capable of abutting against the swing joint. When the scraper blade rotates away from the base rod until it is parallel to the base rod, the swing joint abuts against the limiting surface to prevent the scraper blade from continuing to rotate in the same direction. The limiting surface is arranged on the base rod or the scraper blade.

[0010] Preferably, the handle includes a fixed handle, a movable handle, a first compression spring, and a driving paddle. The fixed handle is fixed to the base rod, the movable handle is hinged to the fixed handle, the first compression spring is sleeved on the movable rod, the driving paddle is fixed on the movable rod, and a blocking structure is provided on the fixed handle. The first compression spring is located between the driving paddle and the blocking structure. One end of the movable handle is abutted against the side of the driving paddle away from the first compression spring. The other end of the movable handle is rotated toward the fixed handle so that one end of the movable handle can push the driving paddle to squeeze the first compression spring to contract and drive the movable rod to move away from the head. When the movable handle is not affected by external force, the first compression spring restores its deformation and can push the movable handle to rotate in the direction away from the fixed handle while driving the movable rod to move toward the direction close to the head.

[0011] Preferably, it also includes a retraction paddle, a second compression spring, and a pin. The movable rod and the retraction paddle are slidably matched. A groove is provided on the fixed handle. One end of the retraction paddle is inserted into the groove. The width of the groove is greater than the width of the retraction paddle, so that the retraction paddle can swing in the groove. The second compression spring is arranged between the retraction paddle and the fixed handle and the two ends of the second compression spring respectively resist the retraction paddle and the fixed handle. A long hole is provided on the retraction paddle. The pin passes through the long hole and one end of the pin resists the fixed handle. The second compression spring pushes the retraction paddle to tilt toward the head direction so that the retraction paddle resists the pin and the movable rod respectively, so that the retraction paddle limits the relative movement of the movable rod and the base rod.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model provides a rotary scraper, comprising a head, a handle, a base rod, and a movable rod that slides with the base rod. The handle is respectively connected with the movable rod and the base rod. The user presses the handle to drive the movable rod to translate along the length direction of the base rod. The utility model is different from the prior art in that it also includes a scraper blade, a swing joint and a limiting structure. The scraper blade is hinged to the base rod. The two ends of the swing joint are respectively hinged to the scraper blade and the movable rod. The movable rod moves and drives the scraper blade to rotate through the swing joint. The scraper blade and the limiting structure cooperate in a two-way limiting manner, so that the maximum angle and the minimum angle of rotation of the scraper blade relative to the base rod can make the scraper blade parallel to the base rod. The device can achieve multi-angle cutting, reduce the involvement of different types of instruments, and help reduce intraoperative risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment:

[0015] Figure 1 It is a schematic diagram of the overall structure of a rotary scraper;

[0016] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0017] Figure 3 for Figure 1 A partial cross-sectional view of

[0018] Figure 4 It is a schematic diagram of the swing joint structure;

[0019] Figure 5 It is a schematic diagram of the structure of the scraper blade;

[0020] Figure 6 for Figure 1 Another state cross-sectional view.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. fixed handle; 2. movable handle; 3. first compression spring; 4. driving paddle; 5. blocking structure; 6. retracting paddle; 7. second compression spring; 8. pin; 9. scraper blade; 901. pin sleeve; 10. swing joint; 101. arc structure; 102. connecting arm; 11. base rod; 12. movable rod; 13. hinge point between swing joint and scraper blade; 14. hinge point between swing joint and movable rod; 15. hinge point between scraper blade and base rod; 16. push screw cover. DETAILED DESCRIPTION

[0022] In order to make the technical purpose, technical solution and beneficial effects of the present invention clearer, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] The utility model provides a rotary scraper, as shown in the figure, comprising a head, a handle, a base rod 11, a movable rod 12, a scraper blade 9, a swing joint 10 and a limiting structure, the base rod 11 is sleeved on the outside of the movable rod 12, the movable rod 12 can slide back and forth along the length direction of the base rod 11, the handle is respectively connected with the movable rod 12 and the base rod 11, the user presses the handle to make the movable rod 12 move relative to the base rod 11, the scraper blade 9 is hinged to the base rod 11 through a hinge shaft, and the two ends of the swing joint 10 are respectively connected through a hinge shaft The scraper blade 9 and the movable rod 12 are hinged, and the swing joint 10 is located above the hinge axis of the scraper blade 9 and the base rod 11. The movable rod 12 moves and drives the scraper blade 9 to rotate with the hinge axis of the scraper blade 9 and the base rod 11 as the rotation center line through the swing joint 10. The scraper blade 9 and the limiting structure are matched with two-way limiting, so that during the reciprocating movement of the movable rod 12, the limiting structure limits the rotation range of the scraper blade 9, and the maximum angle and minimum angle of rotation of the scraper blade 9 relative to the base rod 11 can make the scraper blade 9 parallel to the base rod 11.

[0024] The base rod 11 is provided with a groove located on the rotation path of the scraper blade 9. When the scraper blade 9 rotates in the direction of the base rod 11 until it is parallel to the base rod 11, the scraper blade 9 can be matched and buckled on the groove. The limiting structure includes a peripheral wall of the base rod 11 or a top wall of the groove that can abut against the scraper blade 9 on the rotation path of the scraper blade 9, and a limiting surface that can abut against the swing joint 10 on the rotation path of the swing joint 10. The scraper blade 9 abuts against the peripheral wall of the base rod 11 or the top wall of the groove to prevent the scraper blade 9 from continuing to rotate in the same direction, and the scraper blade 9 is parallel to the base rod 11. When the scraper blade 9 rotates away from the base rod 11 until it is parallel to the base rod 11, the swing joint 10 abuts against the limiting surface to prevent the scraper blade 9 from continuing to rotate in the same direction. The limiting surface is provided on the base rod 11 or the scraper blade 9.

[0025] The handle includes a fixed handle 1, a movable handle 2, a first compression spring 3, and a driving paddle 4. The fixed handle 1 is fixed to the base rod 11, the movable handle 2 is hinged to the fixed handle 1, the first compression spring 3 is sleeved on the movable rod 12, the driving paddle 4 is fixed on the movable rod 12, and a blocking structure 5 is provided on the fixed handle 1. The first compression spring 3 is located between the driving paddle 4 and the blocking structure 5, and the two ends of the first compression spring 3 respectively abut against the driving paddle 4 and the blocking structure 5, one end of the movable handle 2 abuts against the side of the driving paddle 4 away from the first compression spring 3, and the other end of the movable handle 2 rotates toward the fixed handle 1 so that one end of the movable handle 2 can push the driving paddle 4 to squeeze the first compression spring 3 to retract, and the driving paddle 4 drives the movable rod 12 to move toward the blocking structure 5. At the same time, the first compression spring 3 restores its deformation to push the movable handle 2 to rotate in the direction away from the fixed handle 1 while driving the movable rod 12 to move in the direction away from the blocking structure 5.

[0026] In order to limit the position of the head, the device further includes a retracting paddle 6, a second compression spring 7, and a pin 8. The movable rod 12 is slidably matched with the retracting paddle 6. When the retracting paddle 6 and the movable rod 12 are in a vertical state, the movable rod 12 can slide along the retracting paddle 6. A groove is provided on the fixed handle 1. One end of the retracting paddle 6 penetrates into the groove. The width of the groove is greater than the width of the retracting paddle 6, so that the retracting paddle 6 can swing in the groove. The second compression spring 7 is arranged between the retracting paddle 6 and the fixed handle 1, and the two ends of the second compression spring 7 respectively abut the retracting paddle 6 and the fixed handle 1. The second compression spring 7 squeezes the retracting paddle 6 to be inclined toward the head direction. The movable rod 12 abuts against the retracting paddle 6 so that the retracting paddle 6 limits the unidirectional sliding of the movable rod 12. Further, a long hole is provided on the retracting paddle 6. The pin 8 passes through the long hole and one end of the pin 8 abuts against the fixed handle 1. The retracting paddle 6 abuts against the pin 8 at the same time, so that the pin 8 limits the angle of the retracting paddle 6. The tail end of the movable rod 12 passes through the tail end of the base rod 11 .

[0027] For ease of understanding, this embodiment is illustrated with a specific structure as an example, but the present application is not intended to protect a single structure, but rather that the above-mentioned structures are all within the protection scope of the present application. Specifically, the swing joint 10 includes an arc structure 101, a straight rod-shaped connecting arm 102 connected to one end of the arc structure 101, the connecting arm 102 is hinged to the movable rod 12, and a cylindrical pin sleeve 901 is provided at the tail end of the scraper blade 9. The pin passes through the base rod 11 and the pin sleeve 901 of the scraper blade 9 to hinge the scraper blade 9 with the base rod 11. The arc structure 101 of the swing joint 10 crosses the pin sleeve 901 of the scraper blade 9 and is hinged to the scraper blade 9 through a pin. The avoidance groove of the arc structure 101 is sleeved on the outside of the pin sleeve 901. The movable rod 1 The inner wall of the avoidance groove of the swing joint 10 is pushed against the pin shaft sleeve 901 of the scraper blade 9, so that the swing joint 10 cooperates with the scraper blade 9 to limit the continued rotation of the scraper blade 9 (because the movable rod 12 and the base rod 11 are relatively translated, the rotation of the scraper blade 9 away from the base rod 11 causes the swing joint 10 to rotate as well. After the inner wall of the arc structure 101 is against the pin shaft sleeve 901, if the swing joint 10 wants to continue to rotate, the arc structure 101 must press the pin shaft sleeve 901 downward, causing motion interference and limiting the movable rod 12 from continuing to push the swing joint 10 to move), or, during the process of the movable rod 12 pushing the swing joint 10 to rotate, the connecting arm 102 of the swing joint 10 is against the inner wall of the base rod 11, so that the swing joint 10 cooperates with the base rod 11 to limit the continued rotation of the scraper blade 9. The scraper blade 9 is configured as an annular structure, and the blade of the scraper blade 9 is provided on its annular end surface. The inner cavity of the scraper blade 9 can accommodate the protrusion of the arc structure 101 inserted therein, so that the scraper blade 9 can be matched and buckled on the groove.

[0028] Furthermore, when the scraper blade 9 is parallel to the base rod 11 , the height of the hinge point between the swing joint 10 and the scraper blade 9 is higher than the height of the hinge point between the scraper blade 9 and the base rod 11 .

[0029] Furthermore, a push screw cover 16 is provided at the rear end of the movable rod 12 , and the cross-sectional area of ​​the push screw cover 16 is larger than the cross-sectional area of ​​the movable rod 12 to increase the contact surface.

[0030] The method of using this device is:

[0031] 1. The user presses the retracting paddle 6 to release the movable rod 12, and at the same time pushes the tail end of the movable rod 12 forward (pushing the screw cover 16), so that the scraper blade 9 is driven to the front end;

[0032] 2. The user releases the retracting paddle 6 and extends it into the area to be treated in the patient's body;

[0033] 3. The user presses the movable handle 2 to drive the curette blade 9 to rotate to cut the tissue until it engages with the groove of the base rod 11 and then withdraws from the patient's body.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate but not to limit the technical solutions of the present invention, and any equivalent substitutions of the present invention and any modifications or partial substitutions that do not depart from the spirit and scope of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A rotary scraper, comprising a head, a handle, a base rod, and a movable rod slidably matched with the base rod, wherein the handle is respectively matched to connect the movable rod and the base rod, and a user can drive the movable rod to translate along the length direction of the base rod by pressing the handle, characterized in that: The scraper blade body also includes a scraper blade body, a swing joint and a limiting structure. The scraper blade body is hinged to the base rod. The two ends of the swing joint are respectively hinged to the scraper blade body and the movable rod. The movable rod moves and drives the scraper blade body to rotate through the swing joint. The scraper blade body and the limiting structure are matched with two-way limiting, so that the maximum angle and minimum angle of rotation of the scraper blade body relative to the base rod can make the scraper blade body parallel to the base rod.

2. A rotary curette according to claim 1, characterized in that: The base rod is provided with a groove located on the rotation path of the scraper blade, and the limiting structure includes a base rod peripheral wall or a groove top wall located on the rotation path of the scraper blade and capable of abutting against the scraper blade. When the scraper blade rotates toward the base rod until it is parallel to the base rod, the scraper blade can be matched and buckled on the groove, and the scraper blade abuts against the base rod peripheral wall or the groove top wall to prevent the scraper blade from continuing to rotate in the same direction.

3. A rotary curette according to claim 2, characterized in that: The limiting structure also includes a limiting surface located on the rotation path of the swing joint and capable of abutting against the swing joint. When the scraper blade rotates away from the base rod until it is parallel to the base rod, the swing joint abuts against the limiting surface to prevent the scraper blade from continuing to rotate in the same direction. The limiting surface is arranged on the base rod or the scraper blade.

4. A rotary curette according to claim 1, characterized in that: The handle includes a fixed handle, a movable handle, a first compression spring, and a driving paddle. The fixed handle is fixed to the base rod, the movable handle is hinged to the fixed handle, the first compression spring is sleeved on the movable rod, the driving paddle is fixed on the movable rod, a blocking structure is provided on the fixed handle, the first compression spring is located between the driving paddle and the blocking structure, one end of the movable handle is against the side of the driving paddle away from the first compression spring, and the other end of the movable handle is rotated toward the fixed handle so that one end of the movable handle can push the driving paddle to squeeze the first compression spring to contract and drive the movable rod to move away from the head. When the movable handle is not affected by external force, the first compression spring restores its deformation and can push the movable handle to rotate in the direction away from the fixed handle while driving the movable rod to move toward the head.

5. A rotary curette according to claim 4, characterized in that: The second compression spring further includes a retraction paddle and a second compression spring. The movable rod and the retraction paddle are slidably matched. A groove is provided on the fixed handle. One end of the retraction paddle is inserted into the groove. The width of the groove is greater than the width of the retraction paddle, so that the retraction paddle can swing in the groove. The second compression spring is arranged between the retraction paddle and the fixed handle, and the two ends of the second compression spring respectively resist the retraction paddle and the fixed handle. The second compression spring pushes the retraction paddle to tilt toward the head direction so that the retraction paddle resists the movable rod, so that the retraction paddle limits the movement of the movable rod, and the tail end of the movable rod passes through the tail end of the base rod.

6. A rotary curette according to claim 5, characterized in that: It also includes a pin. A long hole is opened on the retracting paddle. The pin passes through the long hole and one end of the pin is against the fixed handle.

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