Bent grinding tool

Abstract

The utility model discloses a bent type grinding cutter which comprises an inner tube and an outer sheath, the inner tube comprises an inner cutter bar, an inner cutter handle and a grinding head assembly, one end of the inner cutter bar is connected with the inner cutter handle, the other end of the inner cutter bar is connected with the grinding head assembly, and the grinding head assembly comprises a grinding head and a bar portion which are integrally formed. The end, away from the grinding head, of the rod part is inserted into the inner cutter rod and fixedly connected with the inner cutter rod, the rod part is provided with a first chip removal channel, the inner cutter rod is provided with a second chip removal channel, the inner cutter handle is provided with a third chip removal channel, and the first chip removal channel, the second chip removal channel and the third chip removal channel are sequentially communicated. The outer sheath is of a hollow structure, the inner pipe rotatably penetrates through the outer sheath, a bendable flexible section is arranged at the end, close to the grinding head assembly, of the inner cutter bar, and the area, matched with the flexible section, of the outer sheath is of a bent structure. The inner tube can be matched with a plurality of outer sheaths with different bending angles, so that the bending effect at any angle is realized; meanwhile, the inner pipe is provided with the chip removal channel, so that grinding chips can be timely discharged out of the body, and foreign matter infection is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a bent grinding tool. Background Art

[0002] In arthroscopic surgery, a grinding tool is required to grind cartilage or tissue stumps. The prior art usually adopts a straight grinding head structure. When a doctor needs to grind soft tissue at a specific angle, a large-angle inclination of the grinding tool is required to achieve the operation, which requires a large rotation space, increases the access incision, and is inconvenient to operate. At the same time, if the debris generated by the tool grinding cartilage or tissue is not completely discharged out of the body in a timely and efficient manner, infection will occur. Summary of the Utility Model

[0003] The purpose of this application is to provide a bent grinding tool to solve the problems raised in the above background art.

[0004] To achieve the above purpose, this application provides the following technical solutions:

[0005] A bent grinding tool, comprising:

[0006] An inner tube, the inner tube includes an inner tool bar, an inner tool handle and a grinding head assembly. One end of the inner tool bar is connected to the inner tool handle, and the other end of the inner tool bar is connected to the grinding head assembly. The grinding head assembly includes a grinding head and a rod part integrally formed. The end of the rod part away from the grinding head is inserted into the inner tool bar and fixedly connected thereto. The rod part is provided with a first chip removal channel, the inner tool bar is provided with a second chip removal channel, and the inner tool handle is provided with a third chip removal channel. The first chip removal channel, the second chip removal channel and the third chip removal channel are sequentially communicated;

[0007] An outer sheath, which is a hollow structure. The inner tube is rotatably disposed through the outer sheath. One end of the inner tool bar close to the grinding head assembly is provided with a bendable flexible section, and the area of the outer sheath cooperating with the flexible section is in a bent structure.

[0008] Further, the first chip removal channel includes a first inner hole and a first side hole. The first inner hole is disposed in the rod part, and the first side hole is disposed on the side wall of the rod part and communicated with the first inner hole.

[0009] Furthermore, the second chip removal channel is an axial through hole of the inner tool bar, and the first inner hole is communicated with the axial through hole.

[0010] Furthermore, the third chip removal channel includes a second inner hole and a second side hole. The second inner hole is disposed in the inner tool handle, the second side hole is disposed on the side wall of the inner tool handle and communicated with the second inner hole, and the second inner hole is communicated with the axial through hole.

[0011] Further, the outer sheath includes an outer cutter bar and an outer cutter handle, and the second side hole is located outside the outer cutter handle.

[0012] Furthermore, a heat shrinkable tube is sleeved on the outer wall of the inner cutter bar, and the heat shrinkable tube is located in the gap between the inner cutter bar and the outer cutter bar.

[0013] Furthermore, a groove for connecting with the rotating end of the power handle is provided at the tail end of the inner cutter handle, and an elastic member is arranged in the groove; a clamping protrusion for clamping with the fixed end of the power handle is arranged on the outer wall of the outer cutter handle.

[0014] Furthermore, a first step is arranged in the axial cavity of the outer cutter handle, and an anti-wear washer is arranged between the end of the first step that abuts against the inner cutter handle.

[0015] Furthermore, a rubber ring is sleeved on the tail end of the outer cutter handle.

[0016] Further, a grinding avoidance opening is arranged at the front end of the outer cutter bar.

[0017] In summary, the technical effects and advantages of the present utility model are as follows: the inner cutter bar with a bendable flexible section of the present utility model can cooperate with a plurality of outer cutter bars with different bending angles to achieve a bending effect at any angle, meeting the clinical requirements; the inner tube is provided with a chip removal channel to timely discharge the chips generated by tool grinding out of the body, avoiding foreign body infection; a heat shrinkable tube is arranged in the gap between the inner cutter bar and the outer cutter bar, which can separate the two, avoiding interference and collision between the inner cutter bar and the outer cutter bar when the inner cutter bar rotates, and also preventing chips from entering the grinding tool and affecting the service life of the tool; the inner cutter handle and the outer cutter handle are in damping cooperation through the elastic extrusion of the rubber ring, which can not only prevent the inner tube from falling off, but also produce a good cooperation feel. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a bent grinding tool in an embodiment of the present utility model;

[0020] Figure 2 It is Figure 1 the A-A cross-sectional view of;

[0021] Figure 3 It is a schematic structural diagram of the inner tube in an embodiment of the present utility model;

[0022] Figure 4 This is the front view of the inner tool holder in an embodiment of the present utility model;

[0023] Figure 5 is Figure 4 the B - B cross-sectional view of;

[0024] Figure 6 This is the front view of the outer tool holder in an embodiment of the present utility model;

[0025] Figure 7 is Figure 6 the C - C cross-sectional view of.

[0026] Wherein:

[0027] 1. Inner tube;

[0028] 11. Inner tool shank; 111. Flexible section; 112. Axial through hole; 113. Heat shrinkable tube;

[0029] 12. Inner tool holder; 121. Second inner hole; 122. Second side hole; 123. Groove; 124. Elastic member;

[0030] 13. Grinding head assembly; 131. Grinding head; 132. Shank portion; 1321. First inner hole; 1322. First side hole;

[0031] 2. Outer sheath;

[0032] 21. Outer tool shank; 211. Grinding avoidance opening;

[0033] 22. Outer tool holder; 221. Boss; 222. First step;

[0034] 3. Anti - wear washer;

[0035] 4. Rubber ring. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] This embodiment provides a bent grinding tool, such as Figures 1-7As shown, the curved grinding tool includes an inner tube 1 and an outer sheath 2. The outer sheath 2 is a hollow structure. The inner tube 1 is rotatably inserted into the outer sheath 2. The inner tube 1 is connected to the rotating end of the power handle, and the outer sheath 2 is connected to the fixed end of the power handle. The power handle drives the inner tube 1 to rotate, and the power handle belongs to an existing structure. Specifically, the inner tube 1 includes an inner tool rod 11, an inner tool handle 12, and a grinding head assembly 13. One end of the inner tool rod 11 is connected to the inner tool handle 12, and the other end of the inner tool rod 11 is connected to the grinding head assembly 13. The grinding head assembly 13 includes an integrally formed grinding head 131 and a rod portion 132. One end of the rod portion 132 away from the grinding head 131 is inserted into the inner tool rod 11 and fixedly connected thereto. The rod portion 132 of the grinding head assembly 13 is provided with a first chip removal channel, the inner tool rod 11 is provided with a second chip removal channel, and the inner tool handle 12 is provided with a third chip removal channel. The first chip removal channel, the second chip removal channel, and the third chip removal channel are sequentially connected to timely discharge the chips generated by grinding cartilage or tissue by the curved grinding tool out of the body to avoid infection. One end of the inner tool rod 11 close to the grinding head assembly 13 is provided with a bendable flexible section 111, and the area of the outer sheath 2 cooperating with the flexible section 111 is a bent structure. In this embodiment, the flexible section 111 on the inner tool rod 11 is provided to adapt to the bent outer sheath 2, so that the flexible section 111 can smoothly push the grinding head assembly 13 through the front end of the outer sheath 2. The inner tool rod 11 provided with the bendable flexible section 111 can cooperate with multiple outer sheaths 2 with different bending angles to achieve a bending effect at any angle and meet the clinical requirements.

[0041] In this embodiment, as Figure 2 shown, the first chip removal channel includes a first inner hole 1321 and a first side hole 1322. Among them, the first inner hole 1321 is provided in the rod portion 132, and the first side hole 1322 is provided in the side wall of the rod portion 132 and communicates with the first inner hole 1321.

[0042] The second chip removal channel is the axial through hole 112 of the inner tool rod 11, and the first inner hole 1321 communicates with the axial through hole 112.

[0043] As Figure 5 shown, the third chip removal channel includes a second inner hole 121 and a second side hole 122. The second inner hole 121 is provided in the inner tool handle 12, the second side hole 122 is provided in the side wall of the inner tool handle 12 and communicates with the second inner hole 121, and the second inner hole 121 communicates with the axial through hole 112.

[0044] Among them, the first inner hole 1321, the axial through hole 112, and the second inner hole 121 are coaxially arranged and sequentially connected to ensure the smoothness of the chip removal channel.

[0045] In this embodiment, continue to refer to Figure 2, the outer sheath 2 includes an outer cutter bar 21 and an outer cutter handle 22, and the area where the outer cutter bar 21 cooperates with the flexible section 111 is in a bent structure. The tail end of the outer cutter bar 21 is injection-molded and connected to the outer cutter handle 22, and the outer cutter bar 21 and the outer cutter handle 22 are respectively sleeved outside the inner cutter bar 11 and the inner cutter handle 12. At least a part of the inner cutter handle 12 is located at the outer end of the outer cutter handle 22, and the second side hole 122 is located outside the outer cutter handle 22, so that debris is prevented from entering the gap between the inner tube 1 and the outer sheath 2.

[0046] In this embodiment, a heat shrinkable tube 113 is sleeved on the outer wall of the inner cutter bar 11, and the heat shrinkable tube 113 is located in the gap between the inner cutter bar 11 and the outer cutter bar 21. The setting of the heat shrinkable tube 113 separates the inner cutter bar 11 and the outer cutter bar 21 on the one hand, avoiding interference and collision between the inner cutter bar 11 and the outer cutter bar 21 when the inner cutter bar 11 rotates, generating excessive debris and affecting the service life of the tool. On the other hand, it can also prevent debris generated by the grinding head 131 grinding the soft tissue stump from entering the gap between the inner cutter bar 11 and the outer cutter bar 21.

[0047] In this embodiment, a groove 123 for connecting with the rotating end of the power handle is provided at the tail end of the inner cutter handle 12, and an elastic member 124 is provided in the groove 123. As Figure 6 shown, a clamping projection 221 for clamping with the fixed end of the power handle is provided on the outer wall of the outer cutter handle 22. In this embodiment, the elastic member 124 is a spring, and the spring abuts against the rotating end of the power handle. When the power handle is moved, the spring is compressed, pushing the inner tube 1 forward. At this time, the clamping projection 221 on the outer sheath 2 clamps the fixed end of the power handle; when the power handle is released, the clamping projection 221 is fixed to the fixed end of the power handle, and the inner tube 1 rotates under the drive of the power handle to realize grinding of the cartilage or tissue stump.

[0048] In this embodiment, as Figure 3 shown, the flexible section 111 includes a plurality of pipe sections connected by concave-convex cutting shapes. In other embodiments, the specific structure of the flexible section 111 is not limited, as long as the bendable function can be realized.

[0049] In this embodiment, as Figure 7 shown, a first step 222 is provided in the axial cavity of the outer cutter handle 22, and an anti-wear washer 3 is provided between the end of the first step 222 that abuts against the inner cutter handle 12. The anti-wear washer 3 is sleeved on the outer peripheral wall of the inner cutter bar 11, one end face of which abuts against the end of the inner cutter handle 12, and the other end face presses against the first step 222. The inner tube 1 rotates around its axis driven by the power handle, and the rotation is likely to cause temperature rise. The setting of the anti-wear washer 3 plays a role in anti-wear and heat insulation, preventing the connection part between the inner cutter handle 12 and the outer cutter handle 22 from melting.

[0050] Continue to refer to Figure 2, a rubber ring 4 is sleeved on the tail end of the outer tool handle 22. The inner tube 1 and the outer sheath 2 are in damping fit through the elastic extrusion of the rubber ring 4, which can not only prevent the inner tube 1 from falling off the outer sheath 2, but also produce a good fitting feel. On the other hand, the rubber ring 4 is tightly sleeved on the outer peripheral wall of the inner tool handle 12, which can prevent liquid from flowing out through the gap between the inner tube 1 and the outer sheath 2.

[0051] A grinding avoidance opening 211 is provided at the front end of the outer tool bar 21. The grinding avoidance opening 211 is an inclined plane cut, and the inclined plane cut is axially inclined relative to the inner tool bar 11. The grinding head 131 is arranged in the grinding avoidance opening 211. The cutting contour of the grinding avoidance opening 211 should be smooth to avoid hooking tissues during the grinding process. The inclination angle of the grinding avoidance opening 211 can be adjusted according to specific situations without limitation.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A curved grinding tool, characterized in that: include: An inner tube (1), the inner tube (1) comprising an inner tool rod (11), an inner tool handle (12) and a grinding head assembly (13), one end of the inner tool rod (11) being connected to the inner tool handle (12), the other end of the inner tool rod (11) being connected to the grinding head assembly (13), the grinding head assembly (13) comprising an integrally formed grinding head (131) and a rod portion (132), one end of the rod portion (132) away from the grinding head (131) being inserted into the inner tool rod (11) and fixedly connected thereto, the rod portion (132) being provided with a first chip removal channel, the inner tool rod (11) being provided with a second chip removal channel, the inner tool handle (12) being provided with a third chip removal channel, the first chip removal channel, the second chip removal channel and the third chip removal channel being connected in sequence; The outer sheath (2) is a hollow structure, the inner tube (1) is rotatably inserted into the outer sheath (2), the inner cutter rod (11) is provided with a bendable flexible section (111) at one end close to the grinding head assembly (13), and the area where the outer sheath (2) cooperates with the flexible section (111) is a bent structure.

2. The curved grinding tool according to claim 1, characterized in that: The first chip removal channel comprises a first inner hole (1321) and a first side hole (1322), wherein the first inner hole (1321) is arranged in the rod portion (132), and the first side hole (1322) is arranged on the side wall of the rod portion (132) and communicates with the first inner hole (1321).

3. The curved grinding tool according to claim 2, characterized in that: The second chip removal channel is an axial through hole (112) of the inner tool rod (11), and the first inner hole (1321) is in communication with the axial through hole (112).

4. The curved grinding tool according to claim 3, characterized in that: The third chip removal channel comprises a second inner hole (121) and a second side hole (122); the second inner hole (121) is arranged in the inner tool handle (12); the second side hole (122) is arranged on the side wall of the inner tool handle (12) and is connected to the second inner hole (121); the second inner hole (121) is connected to the axial through hole (112).

5. The curved grinding tool according to claim 4, characterized in that: The outer sheath (2) comprises an outer blade rod (21) and an outer blade handle (22), and the second side hole (122) is located outside the outer blade handle (22).

6. The curved grinding tool according to claim 5, characterized in that: A heat shrink tube (113) is sleeved on the outer wall of the inner knife rod (11), and the heat shrink tube (113) is located in the gap between the inner knife rod (11) and the outer knife rod (21).

7. The curved grinding tool according to claim 5, characterized in that: The rear end of the inner knife handle (12) is provided with a groove (123) connected to the rotating end of the power handle, and an elastic member (124) is provided in the groove (123); the outer wall of the outer knife handle (22) is provided with a clamping protrusion (221) clamped with the fixed end of the power handle.

8. The curved grinding tool according to claim 5, characterized in that: A first step (222) is provided in the axial cavity of the outer tool handle (22), and an anti-wear washer (3) is provided between the end where the first step (222) abuts against the inner tool handle (12).

9. The curved grinding tool according to claim 5, characterized in that: The rear end of the outer knife handle (22) is sleeved with a rubber ring (4).

10. The curved grinding tool according to claim 5, characterized in that: The front end of the outer knife rod (21) is provided with a grinding avoidance opening (211).

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