Swing curette

Abstract

The utility model provides a swinging curette, which relates to the technical field of medical instruments and comprises a base rod, a movable rod in sliding fit with the base rod, a handle, a curette head and a swinging joint, the handle, the curette head and the swinging joint are respectively connected with the movable rod and the base rod in a matched mode, the base rod is hinged to the swinging joint and is in limiting fit through a first limiting structure, and the movable rod is in running fit with the swinging joint. The movable rod moves to drive the swing joint to rotate with a hinge shaft of the swing joint and the base rod as a rotation center line, the first limiting structure limits the swing range of the swing joint, the curette head is hinged to the swing joint and is in limiting fit with the swing joint through the second limiting structure, and the second limiting structure limits the rotation range of the curette head. The device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a swinging 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 structures, including two or more fingers. The existing device is mechanically inconvenient to use, has a complex structure, a high failure rate and is not easy to repair. Utility Model Content

[0004] The utility model aims to provide a swing scraper to solve the inconvenience of use in the prior art.

[0005] technical issues.

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

[0007] The utility model provides a swing scraper, comprising a handle, a base rod, and a movable rod slidably matched with the base rod, the handle being respectively matched with the movable rod and the base rod, and a user pressing the handle can drive the movable rod to move along the length direction of the base rod, and also comprising a scraper head and a swing joint, the base rod being hinged to the swing joint and being limited by a first limiting structure, the movable rod being rotationally matched with the swing joint, the movable rod moving to drive the swing joint to rotate with the hinge axis of the swing joint and the base rod as the rotation center, and the scraper head being hinged to the swing joint and being limited by a second limiting structure.

[0008] Preferably, a first long hole is provided on the swing joint, and the movable rod passes through the first long hole through the cooperation of a first column pin connected thereto, and the first column pin can slide along the length direction of the first long hole and can rotate relative to the first long hole.

[0009] Preferably, the first limiting structure includes a first stopper arranged on the swing joint, a first limiting surface and a second limiting surface arranged on the base rod and located on the rotation path of the first stopper, the first stopper is arranged between the first limiting surface and the second limiting surface, and the first stopper can respectively abut against the first limiting surface and the second limiting surface during the bidirectional rotation process to limit the relative rotation range of the swing joint and the base rod, the swing joint rotates relative to the base rod in the direction of the first limiting surface until the first stopper abuts against the first limiting surface and is perpendicular to the base rod, and the swing joint rotates relative to the base rod in the direction of the second limiting surface until the first stopper abuts against the second limiting surface and is parallel to the base rod.

[0010] Preferably, the second limiting structure includes a second stopper arranged on the swing joint, a third limiting surface and a fourth limiting surface arranged on the scraper head and located on the swing path of the second stopper, the second stopper is arranged between the third limiting surface and the fourth limiting surface, and the third limiting surface and the fourth limiting surface can respectively offset the second stopper to limit the swing range of the scraper head.

[0011] Preferably, the handle includes a fixed handle, a movable handle and an elastic structure. The fixed handle is fixed to the base rod, the movable handle is hinged to the fixed handle, and the movable handle and the movable rod are rotatably matched. The elastic structure is located between the movable handle and the fixed handle and respectively abuts against the movable handle and the fixed handle. The movable handle rotates relative to the fixed handle to push the movable rod to slide along the base rod, and the elastic structure contracts or pushes the movable handle to rotate away from the fixed handle when the movable handle rotates toward the fixed handle.

[0012] Preferably, a slider and a groove are respectively provided on the opposite surfaces of the base rod and the movable rod, and the groove includes a guide groove for limiting the sliding direction of the slider and a release groove connected to the guide groove and from which the slider can be detached. The slider is matched and arranged in the guide groove, and the base rod and the movable rod can be separated by moving the slider from the guide groove to the release groove.

[0013] Preferably, a second long hole is provided on the movable handle, the movable handle is hinged to the fixed handle, the movable rod rotates with the movable handle through a second column pin connected to it passing through the second long hole, and the second column pin can slide along the length direction of the second long hole and can rotate relative to the second long hole.

[0014] Preferably, the elastic structure is configured as a compression spring or a spring sheet.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model provides a swing scraper, including 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. When a user presses the handle, the movable rod can be driven to translate along the length direction of the base rod. The utility model also includes a scraper head and a swing joint. The scraper head is limitedly matched and hinged with the swing joint, the swing joint is limitedly matched and hinged with the base rod, the swing joint is rotationally matched with the movable rod, and the movable rod moves to drive the swing joint to rotate with the hinge axis of the swing joint and the base rod as the rotation center line. In the utility model, when the operator applies force to the handle, the rotation of the movable handle will be transmitted to the head via the movable rod, so that the head can rotate relative to the base rod to adjust the angle of the scraper head to make it in a working or folded state. At the same time, the swing of the scraper head during the scraping process improves the scraping effect. The device has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 It is a schematic diagram of the overall structure of the swinging scraper;

[0019] Figure 2 This is a schematic diagram of the head structure explosion;

[0020] Figure 3 for Figure 2 Bottom view of

[0021] Figure 4 for Figure 1 Another state diagram;

[0022] Figure 5 These are diagrams of the three types of matching relationships between the scraper head and the swing joint.

[0023] Explanation of the accompanying drawings: 1. scraper head; 2. swing joint; 3. cylindrical pin; 4. first long hole; 5. first cylindrical pin; 6. sliding block; 7. groove; 8. base rod; 9. movable rod; 10. fixed handle; 11. movable handle; 12. elastic structure; 13. hinge axis of movable handle and fixed handle; 14. second long hole; 15. second limiting surface; 16. second stopper; 17. third limiting surface; 18. fourth limiting surface. DETAILED DESCRIPTION

[0024] In order to make the technical purpose, technical solution and beneficial effects of the present utility model clearer, the technical solution of the present utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] The utility model provides a swing scraper, as shown in the figure, comprising a base rod 8, a movable rod 9, a head and a handle. The base rod 8 is the basic supporting component of the entire device. The movable rod 9 is slidably matched with the base rod 8. The movable rod 9 can perform translational movement in the length direction of the base rod 8. The head is the part that actually performs the scraping operation. The head is hinged to the base rod 8 and rotatably matched with the movable rod 9. When the movable rod 9 moves along the base rod 8, it can drive the head to rotate around the hinge axis between it and the base rod 8, thereby realizing the adjustment of the head angle.

[0026] The handle includes a fixed handle 10, a movable handle 11 and an elastic structure 12. The fixed handle 10 is fixed to the base rod 8. The movable handle 11 is hinged to the fixed handle 10. The elastic structure 12 is located between the movable handle 11 and the fixed handle 10 and contacts the movable handle 11 and the fixed handle 10 respectively. The elastic structure 12 is contracted or pushed to rotate the movable handle 11 away from the fixed handle 10 by the movable handle 11 rotating toward the fixed handle 10. The movable handle 11 is rotatably matched with the movable rod 9. A second long hole 14 is provided on the movable handle 11. The movable rod 9 passes through the second long hole 14 through a second column pin connected thereto. The second column pin can slide along the length direction of the second long hole 14 and the second column pin and the second long hole 14 can rotate relative to each other. When the operator rotates the movable handle 11, the movable handle 11 rotates relative to the fixed handle 10 to drive the movable rod 9 to slide along the base rod 8.

[0027] The head includes a scraper head 1 and a swing joint 2. The swing joint 2 and the scraper head 1 are hinged by a cylindrical pin 3 (the cylindrical pin 3 vertically passes through the swing joint 2 and the scraper head 1 to hinge the two), so that the scraper head 1 can swing relative to the swing joint 2. The scraper head 1 and the swing joint 2 are limited by a second limiting structure. The second limiting structure limits the swing range of the scraper head 1. Specifically, the second limiting structure includes a second stopper arranged on the swing joint 2, a third limiting surface and a fourth limiting surface arranged on the scraper head and located on the bidirectional rotation path of the second stopper. During the relative swinging process of the scraper head 1 and the swing joint 2, the second stopper can be offset against the third limiting surface or the fourth limiting surface to limit the swing range of the scraper head 1 and the swing joint 2.

[0028] The end of the swing joint 2 away from the scraper head 1 is hinged to the base rod 8, and a first long hole 4 is also provided on the swing joint 2. The movable rod 9 is connected to the swing joint 2 by passing through the first long hole 4 through the first column pin 5 connected thereto. The first column pin can slide along the length direction of the first long hole 4. The matching width of the first long hole 4 and the first column pin can allow the first column pin to rotate in the first long hole 4. When the movable rod 9 is translated along the base rod 8, due to the hinge connection between the base rod 8 and the swing joint 2, the first column pin can push the swing joint 2 to rotate and the first column pin is limited by the movable rod 9 and slides relative to the first long hole 4, so that the swing joint 2 and the scraper head 1 connected thereto can be adjusted in angle within a certain range according to actual needs.

[0029] In order to minimize the cross-sectional area of ​​the curette head 1 when the device is inserted into the body, that is, the curette head 1 is inserted into the lesion site through the intervertebral disc channel formed by drilling and reaming when the swing joint is parallel to the base rod, and then switched to 90° to scrape the upper and lower lamina on the intervertebral disc resection surface, that is, the angle range of the curette head 1 needs to be limited. Specifically,

[0030] The base rod 8 is hinged to the swing joint 2 and is limited by a first limiting structure. The first limiting structure includes a first stopper 20 arranged on the swing joint 2, a first limiting surface 19 and a second limiting surface 15 arranged on the base rod 8 and located on the bidirectional rotation path of the first stopper 20. During the relative bidirectional rotation of the swing joint 2 and the base rod 8, the first stopper 20 can abut against the first limiting surface 19 or the second limiting surface 15 to limit the maximum rotation angle and the minimum rotation angle of the swing joint 2 and the base rod 8. During the rotation of the swing joint 2, the first stopper 20 can abut against the first limiting surface 19 to limit the scraper head 1 to be perpendicular to the base rod 8, or the first stopper can abut against the second limiting surface 15 to limit the scraper head 1 to be parallel to the base rod 8.

[0031] The base rod 8 and the movable rod 9 are provided with a slider 6 and a groove 7 on the opposite surfaces thereof, the slider 6 is matched and arranged in the guide groove, the groove 7 includes a guide groove for limiting the sliding direction of the slider 6, and a release groove connected to the guide groove and from which the slider 6 can be separated, and the slider 6 moves from the guide groove to the release groove to separate the base rod 8 and the movable rod 9. Further, the slider 6 is provided as a T-block, and the guide groove is provided as a T-slot matching the T-block.

[0032] 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 swinging scraper, comprising a handle, a base rod, and a movable rod slidably matched with the base rod, wherein the handle is respectively connected to the movable rod and the base rod, and a user can drive the movable rod to move along the length direction of the base rod by pressing the handle, characterized in that: The scraper head and the swing joint are also included. The base rod is hinged to the swing joint and is limited by a first limiting structure. The movable rod is rotationally matched with the swing joint. The movable rod moves to drive the swing joint to rotate with the hinge axis of the swing joint and the base rod as the rotation center. The scraper head and the swing joint are hinged to the swing joint and are limited by a second limiting structure.

2. A swinging scraper according to claim 1, characterized in that: A first long hole is provided on the swing joint, and the movable rod passes through the first long hole through the cooperation of a first column pin connected thereto, and the first column pin can slide along the length direction of the first long hole and can rotate relative to the first long hole.

3. A swinging scraper according to claim 2, characterized in that: The first limiting structure includes a first stopper arranged on the swing joint, a first limiting surface and a second limiting surface arranged on the base rod and located on the rotation path of the first stopper, the first stopper is arranged between the first limiting surface and the second limiting surface, and the first stopper can respectively abut against the first limiting surface and the second limiting surface during the bidirectional rotation process to limit the relative rotation range of the swing joint and the base rod, the swing joint rotates relative to the base rod in the direction of the first limiting surface until the first stopper abuts against the first limiting surface and is perpendicular to the base rod, and the swing joint rotates relative to the base rod in the direction of the second limiting surface until the first stopper abuts against the second limiting surface and is parallel to the base rod.

4. The oscillating scraper according to claim 1, characterized in that: The second limiting structure includes a second stopper arranged on the swing joint, a third limiting surface and a fourth limiting surface arranged on the scraper head and located on the swing path of the second stopper, the second stopper is arranged between the third limiting surface and the fourth limiting surface, and the third limiting surface and the fourth limiting surface can respectively offset the second stopper to limit the swing range of the scraper head.

5. The oscillating scraper according to claim 1, characterized in that: The handle includes a fixed handle, a movable handle and an elastic structure. The fixed handle is fixed to the base rod, the movable handle is hinged to the fixed handle, and the movable handle and the movable rod rotate in coordination. The elastic structure is located between the movable handle and the fixed handle and respectively abuts against the movable handle and the fixed handle. The movable handle rotates relative to the fixed handle to push the movable rod to slide along the base rod. The elastic structure contracts or pushes the movable handle to rotate away from the fixed handle as the movable handle rotates toward the fixed handle.

6. The oscillating scraper according to claim 1, characterized in that: A slider and a groove are respectively arranged on the opposite surfaces of the base rod and the movable rod. The groove includes a guide groove for limiting the sliding direction of the slider and a release groove connected to the guide groove and from which the slider can be detached. The slider is matched and arranged in the guide groove. The base rod and the movable rod can be separated by moving the slider from the guide groove to the release groove.

7. The oscillating curette according to claim 1, characterized in that: The movable handle is hinged to the fixed handle, and a second long hole is opened on the movable handle. The movable rod rotates with the movable handle through the second long hole through the second column pin connected to it. The second column pin can slide along the length direction of the second long hole and the second column pin and the second long hole can rotate relative to each other.

8. The oscillating scraper according to claim 5, characterized in that: The elastic structure is configured as a compression spring or a spring sheet.

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