Straight planing tool bit and planing tool

Abstract

The utility model relates to the technical field of medical instruments, and discloses a straight planing tool bit and a planing planer, the straight planing tool bit comprises an inner tube part, an outer tube part and a tool apron, the inner tube part comprises an inner tool tube and an inner tool bit, and the inner tool tube is communicated with the inner tool bit; the outer tube component comprises an outer knife tube and an outer knife head, and the outer knife tube is communicated with the outer knife head; the inner tool bit is rotatably arranged in the outer tool bit, the inner tool tube is rotatably arranged in the outer tool tube, window structures are formed in the inner tool bit and the outer tool bit, the tool apron comprises an outer tool apron body and an inner tool apron body, the inner tool apron body is rotatably connected with the outer tool apron body, the outer tool tube is fixedly connected with the outer tool apron body, and the inner tool tube is fixedly connected with the inner tool apron body. A bendable structure is arranged on one side, close to the inner cutter head, of the inner cutter tube; the planer tool comprises a planer tool handle and a straight planing tool bit. The utility model solves the problems that in the actual operation, the inner knife tube is easy to slightly swing and bend, so that the inner knife head is not aligned, the inner knife head and the outer knife head are blocked, and the normal operation of the operation is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a straight planing tool head and a planing tool. Background Art

[0002] A planer is a tool frequently used in minimally invasive endoscopic surgery. It is mainly used for planing soft tissues in surgical operations such as ENT, joints, urology and gynecology. It is connected to a negative pressure suction device through a negative pressure suction tube. The negative pressure is transmitted to the front end through the hollow tool, sucking the soft tissue into the blade. The outer blade barrel of the tool is fixed, and the tool performs reciprocating rotation under the drive of the motor, so that the cutting end of the tool cuts off the soft tissue.

[0003] The patent document with application number CN202211497488.4 discloses an outer knife assembly and an outward water hemostatic planer, which includes an inner knife assembly and an outer knife assembly. The outer knife assembly is used for the outward water hemostatic planer, and the outer knife assembly includes an outer electrode head, an outer electrode ring, an inner electrode ring, and an outer knife tube, an insulating sleeve and a water pipe which are sequentially arranged from the inside to the outside; an outer knife head is arranged at the front end of the outer knife tube, and a water flow channel is formed between the water pipe and the insulating sleeve, the outer electrode head is arranged at the front end of the insulating sleeve, the outer electrode ring is arranged at the rear end of the insulating sleeve and is electrically connected to the outer electrode head, and the inner electrode ring is arranged at the rear end of the outer knife tube and is electrically connected to the outer knife head.

[0004] The water-exiting hemostatic planer provided by the above patent solution can shorten the operation time and improve the operation efficiency, and the planer adopts the water-exiting mode, which can effectively improve the conduction performance, hemostasis effect and cooling performance. However, because the outer and inner blade tubes are straight tubes, in actual surgery, the inner blade tube has a very small wall thickness and there is a certain gap between the outer and inner blade tubes. When the inner blade tube rotates, the inner blade tube is prone to slight swing and bending, which causes the inner blade head to be misaligned, and then causes the inner and outer blade heads to get stuck, affecting the normal operation. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a straight planing cutter head and a planer to solve the problem that in actual surgery, the inner knife tube is prone to slight swinging and bending, which causes the inner knife head to be misaligned, and then causes jamming between the inner and outer knife heads, affecting the normal progress of the operation.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] In the first aspect, the utility model discloses a straight planing tool head, comprising an inner tube component, an outer tube component and a tool holder, the inner tube component comprising an inner tool tube and an inner tool head, the inner tool tube being fixedly connected to the inner tool head; the outer tube component comprising an outer tool tube and an outer tool head, the outer tool tube being fixedly connected to the outer tool head; the inner tool head is rotatably arranged in the outer tool head, the inner tool tube is rotatably arranged in the outer tool tube, both the inner tool head and the outer tool head are provided with window structures, the tool holder comprises an outer tool holder and an inner tool holder, the inner tool holder is rotatably connected to the outer tool holder, the outer tool tube is fixedly connected to the outer tool holder, the inner tool tube is fixedly connected to the inner tool holder, and a bendable structure is arranged on the side of the inner tool tube close to the inner tool head.

[0008] Furthermore, the bendable structure is a single buckle structure, and the single buckle structure is a structure in which adjacent inner blade tubes are mutually engaged in a concave-convex matching manner. The single buckle structure in the technical solution can be formed by laser cutting. With such a setting, when the inner blade head and the outer blade head are stuck, the single buckle structure can be slightly bent to release the jam, so that the inner blade head can be continuously rotated to perform the planing operation.

[0009] Furthermore, a first stepped hole is axially provided on the outer blade seat, one end of the outer blade tube away from the outer blade head is fixedly connected to the inner wall of the small hole of the first stepped hole, and the inner blade seat is rotatably provided on the inner wall of the large hole of the first stepped hole; there is a water flow channel between the small hole of the first stepped hole and the outer wall of the inner blade tube, and a water injection hole is provided on the outer blade seat that runs from the outside to the water flow channel, there is a gap between the outer blade tube and the inner blade tube, and the water flow channel is connected to the gap between the outer blade tube and the inner blade tube, and a first sealing ring is provided at the bottom of the large hole of the first stepped hole, and the inner blade tube passes through the first sealing ring. With such a configuration, the planing blade head can be injected with water, and the external water enters from the water injection hole on the outer blade seat, then enters the water flow channel, passes through the gap between the outer blade tube and the inner blade tube, and finally flows out from the gap between the outer blade head and the inner blade head, so as to moisten the planing part and cool down the entire planing blade head.

[0010] Furthermore, the first sealing ring is a lip-shaped sealing ring, a stopper is fixed on the inner wall of the large hole of the first stepped hole, and the two ends of the lip-shaped sealing ring are respectively against the bottom of the large hole of the first stepped hole and the end of the stopper. Such a setting makes the sealing of the water channel more strict and avoids water leakage.

[0011] Furthermore, a second stepped hole is axially penetrated on the inner tool holder, an elastic member and a second sealing ring are arranged in the large hole of the second stepped hole, one end of the elastic member abuts against the bottom of the large hole of the second stepped hole, and the other end of the elastic member abuts against the second sealing ring; a liner is sleeved on the end of the inner tool tube away from the inner tool head, one end of the liner is rotatably arranged on the inner ring of the lip sealing ring, and the other end of the liner passes through the small hole of the second stepped hole, the elastic member and the second sealing ring in sequence, and is fixedly arranged on the inner ring of the second sealing ring. In this technical solution, the inner tool holder is connected to the external planing handle to transmit power to the inner tool holder, which is then transmitted to the liner through the inner tool holder, and the liner is connected to the inner tool tube, and the inner tool tube is connected to the inner tool head to realize the rotational movement of the inner tool head.

[0012] Further, the elastic member is a spring. In fact, the elastic member can also be, for example, an elastic rubber ring, etc. In this solution, the elastic member is a spring, which has a better effect.

[0013] Furthermore, a flat structure is arranged on the same side of the inner cutter head as the window structure. Such an arrangement enables a larger water outlet to be provided between the outer cutter head and the inner cutter head, and when external water is injected into the inner cutter head and the outer cutter head from the gap between the inner cutter tube and the outer cutter tube, the injected water can flow out through the water outlet at the flat structure, just located at the window structure of the inner cutter head, to moisten the planing part.

[0014] Furthermore, the edges of the window structures of the inner and outer cutter heads are both provided with a plurality of tooth cutting edges, so that the inner and outer cutter heads can be sharper during rotational planing, and the operation efficiency is higher.

[0015] Furthermore, an annular groove is provided on the outer wall of the outer blade holder on both sides of the water injection hole, and a third sealing ring is provided in the annular groove. When the planing cutter head is connected to the handle, the injected water enters the water injection hole of the outer blade holder through the handle, and the provision of the third sealing ring can prevent the water injection hole from overflowing, thereby making the surgical environment better.

[0016] In a second aspect, the utility model further discloses a planer, which comprises a planer handle and the above-mentioned straight planing tool head.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model provides a bendable single buckle structure on the inner knife tube. When the inner knife head and the outer knife head are stuck, the single buckle structure can be slightly bent to release the jam, so that the inner knife head can be continuously rotated to perform the planing operation, thereby avoiding the problem that the inner knife tube is prone to slight swinging and bending during the actual operation, which causes the inner knife head to be misaligned, and then causes the inner knife head and the outer knife head to be stuck, affecting the normal operation.

[0019] 2. When the utility model is used, water can be injected from the water injection hole through the external handle, the injected water enters the water flow channel, and then enters the gap between the outer knife tube and the inner knife tube, and flows out from the water outlet at the flat structure of the inner knife head, thereby moistening and cooling the knife head; when the outer knife head and the inner knife head cut the soft tissue, the soft tissue enters the pipe of the inner knife tube together with the water after being cut, and the external handle of the inner knife tube is generally connected to a negative pressure suction device. Under the negative pressure suction, the soft tissue and water are mixed and then brought out through the pipe of the inner knife tube. In this process, because the soft tissue is diluted by water, it is not easy to block the pipe of the inner knife tube, so that the operation can be carried out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a straight planing cutter head of the utility model;

[0021] Figure 2 for Figure 1 Exploded diagram of

[0022] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0023] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of;

[0024] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0025] Figure 6 for Figure 2 Schematic diagram of the structure of the Chinese and foreign knife holders;

[0026] Figure 7 for Figure 2 Schematic diagram of the structure of the inner tool holder;

[0027] Figure 8 for Figure 2 Schematic diagram of the structure of the inner cutter head.

[0028] Among them, there are inner knife tube 1, inner knife head 2, outer knife tube 3, outer knife head 4, tooth cutting edge 5, flat structure 6, outer knife seat 7, inner knife seat 8, single snap structure 9, first stepped hole 10, water flow channel 11, water injection hole 12, first sealing ring 13, stopper sleeve 14, second stepped hole 15, spring 16, second sealing ring 17, liner 18, annular groove 19, and third sealing ring 20. DETAILED DESCRIPTION

[0029] The utility model will be described in detail below with reference to the accompanying drawings:

[0030] Embodiment 1,

[0031] like Figures 1 to 8 As shown: This embodiment is a straight planing tool head, including an inner tube component, an outer tube component and a tool holder, the inner tube component includes an inner tool tube 1 and an inner tool head 2, the inner tool tube 1 is welded and fixedly connected to the inner tool head 2; the outer tube component includes an outer tool tube 3 and an outer tool head 4, the outer tool tube 3 is welded and fixedly connected to the outer tool head 4; the inner tool head 2 is rotatably arranged in the outer tool head 4, and the inner tool tube 1 is rotatably arranged in the outer tool tube 3; as shown Figure 8 As shown, window structures are provided on the inner cutter head 2 and the outer cutter head 4. In order to make the inner cutter head 2 and the outer cutter head 4 sharper during rotational planing, a plurality of tooth cutting edges 5 are provided on the edges of the window structures of the inner cutter head 2 and the outer cutter head 4. A flat structure 6 is provided on the same side of the inner cutter head 2 as the window structure, so that a larger water outlet is provided between the outer cutter head 4 and the inner cutter head 2.

[0032] like Figure 4-7 As shown, the knife seat includes an outer knife seat 7 and an inner knife seat 8, the inner knife seat 8 is rotatably connected to the outer knife seat 7, the outer knife tube 3 is fixedly connected to the outer knife seat 7, the inner knife tube 1 is fixedly connected to the inner knife seat 8, and a bendable structure is provided on the left side of the inner knife tube 1. Figure 2 and Figure 3 As shown, the bendable structure of this embodiment is a single snap-on structure 9. The single snap-on structure 9 is a structure in which adjacent inner blade tubes 1 are mutually embedded in a concave-convex matching manner. The single snap-on structure 9 can be formed by laser cutting.

[0033] Specifically, Figure 4-7 As shown, a first stepped hole 10 is axially provided on the outer tool holder 7, the right end of the outer tool tube 3 is fixedly connected to the inner wall of the small hole of the first stepped hole 10, and the left end of the inner tool holder 8 is rotatably provided on the inner wall of the large hole of the first stepped hole 10; a water flow channel 11 is provided between the small hole of the first stepped hole 10 and the outer wall of the inner tool tube 1, a water injection hole 12 is provided on the outer tool holder 7, which runs from the outside to the water flow channel 11, a gap is provided between the outer tool tube 3 and the inner tool tube 1, and the water flow channel 11 is connected to the gap between the outer tool tube 3 and the inner tool tube 1, and a first sealing ring 13 is provided at the bottom of the large hole of the first stepped hole 10. The first sealing ring 13 of this embodiment is a lip sealing ring, and the inner tool tube 1 passes through the lip sealing ring. In practice, the first sealing ring 13 can also be an O-type sealing ring. A stopper 14 is fixed on the inner wall of the large hole of the first stepped hole 10, and the two ends of the lip sealing ring are respectively against the bottom of the large hole of the first stepped hole 10 and the end of the stopper 14.

[0034] A second stepped hole 15 is axially provided on the inner knife seat 8, and an elastic member and a second sealing ring 17 are provided in the large hole of the second stepped hole 15. The elastic member of this embodiment is a spring 16. In fact, the elastic member can also be, for example, an elastic rubber ring. The left end of the spring 16 of this embodiment abuts against the bottom of the large hole of the second stepped hole 15, and the right end of the spring 16 abuts against the second sealing ring 17; a liner 18 is sleeved on the right end of the inner knife tube 1, and the left end of the liner 18 is rotatably arranged on the inner ring of the lip sealing ring, and the right end of the liner 18 passes through the small hole of the second stepped hole 15, the spring 16 and the second sealing ring 17 in sequence, and is fixedly arranged on the inner ring of the second sealing ring 17. Annular grooves 19 are provided on the outer wall of the outer knife seat 7 on both sides of the water injection hole 12, and a third sealing ring 20 is arranged in the annular groove 19.

[0035] The use process of the utility model is as follows:

[0036] When in use, power is transmitted from the inner tool holder 8 through an external handle connected thereto, and then transmitted to the liner 18 through the inner tool holder 8. The liner 18 is connected to the inner tool tube 1, and the inner tool tube 1 is connected to the inner tool head 2, thereby realizing the rotation movement of the inner tool head 2. The inner tool head 2 cooperates with the outer tool head 4 for planing.

[0037] During the planing process, water can be injected from the water injection hole 12 through the external handle, and the injected water enters the water flow channel 11, and then enters the gap between the outer knife tube 3 and the inner knife tube 1, and flows out from the water outlet at the flat structure 6 of the inner knife head 2, thereby moistening and cooling the knife head; when the outer knife head 4 and the inner knife head 2 cut the soft tissue, the soft tissue enters the pipe of the inner knife tube 1 together with the water after being cut, and the external handle of the inner knife tube 1 is generally connected to a negative pressure suction device. Under the suction of negative pressure, the soft tissue and water are mixed and then brought out through the pipe of the inner knife tube 1. In this process, because the soft tissue is diluted by water, it is not easy to block the pipe of the inner knife tube 1, so that the operation can be carried out smoothly.

[0038] If the inner cutter head 2 and the outer cutter head 4 get stuck, because the inner cutter tube 1 is provided with a bendable single snap structure 9, the single snap structure 9 can bend slightly to release the jam, so that the inner cutter head 2 can rotate continuously to perform the planing operation, thereby avoiding the problem that the inner cutter tube 1 is prone to slight swinging and bending during the actual operation, which may cause the inner cutter head 2 to be misaligned, and then cause the inner cutter head 2 to get stuck with the outer cutter head 4, affecting the normal progress of the operation.

[0039] Embodiment 2,

[0040] This embodiment is a planer, which includes a planer handle and the straight planing tool head of the above-mentioned embodiment 1, and the straight planing tool head is connected to the planer handle through an inner tool seat 8.

[0041] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A straight planing tool head, comprising an inner tube component, an outer tube component and a tool holder, wherein the inner tube component comprises an inner tool tube and an inner tool head, wherein the inner tool tube is fixedly connected to the inner tool head; the outer tube component comprises an outer tool tube and an outer tool head, wherein the outer tool tube is fixedly connected to the outer tool head; the inner tool head is rotatably arranged in the outer tool head, and the inner tool tube is rotatably arranged in the outer tool tube, wherein both the inner tool head and the outer tool head are provided with a window structure, wherein: The knife seat comprises an outer knife seat and an inner knife seat, the inner knife seat is rotatably connected to the outer knife seat, the outer knife tube is fixedly connected to the outer knife seat, the inner knife tube is fixedly connected to the inner knife seat, and a bendable structure is arranged on one side of the inner knife tube close to the inner knife head.

2. A straight planing cutter head according to claim 1, characterized in that: The bendable structure is a single buckle structure, and the single buckle structure is a structure in which adjacent inner knife tubes are interlocked in a concave-convex matching manner.

3. A straight planing tool head according to claim 1 or 2, characterized in that: A first stepped hole is axially penetrated on the outer tool holder, one end of the outer tool tube away from the outer tool head is fixedly connected to the inner wall of the small hole of the first stepped hole, and the inner tool holder is rotatably arranged on the inner wall of the large hole of the first stepped hole; a water flow channel is provided between the small hole of the first stepped hole and the outer wall of the inner tool tube, a water injection hole is provided on the outer tool holder that penetrates from the outside to the water flow channel, a gap is provided between the outer tool tube and the inner tool tube, the water flow channel is connected with the gap between the outer tool tube and the inner tool tube, a first sealing ring is provided at the bottom of the large hole of the first stepped hole, and the inner tool tube passes through the first sealing ring.

4. A straight planing cutter head according to claim 3, characterized in that: The first sealing ring is a lip-shaped sealing ring, a stopper sleeve is fixed on the inner wall of the large hole of the first stepped hole, and two ends of the lip-shaped sealing ring are respectively against the bottom of the large hole of the first stepped hole and the end of the stopper sleeve.

5. A straight planing tool head according to claim 4, characterized in that: A second stepped hole is axially penetrated through the inner tool seat, an elastic member and a second sealing ring are arranged in the large hole of the second stepped hole, one end of the elastic member is abutted against the bottom of the large hole of the second stepped hole, and the other end of the elastic member is abutted against the second sealing ring; a liner is sleeved on the end of the inner tool tube away from the inner tool head, one end of the liner is rotatably arranged on the inner ring of the lip sealing ring, and the other end of the liner passes through the small hole of the second stepped hole, the elastic member and the second sealing ring in sequence, and is fixedly arranged on the inner ring of the second sealing ring.

6. A straight planing cutter head according to claim 5, characterized in that: The elastic member is a spring.

7. A straight planing tool head according to claim 1, characterized in that: A flat structure is arranged on the same side of the inner cutter head as the window structure.

8. A straight planing tool head according to claim 1, characterized in that: A plurality of tooth cutting edges are arranged on the edges of the window structures of the inner cutter head and the outer cutter head.

9. A straight planing tool head according to claim 3, characterized in that: Annular grooves are arranged on the outer walls of the outer knife seats on both sides of the water injection hole, and a third sealing ring is arranged in the annular groove.

10. A planer, characterized in that: The planer comprises a planer handle and the straight planing tool head according to claim 1.

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