Water injection planing tool bit and planing tool

Abstract

The utility model relates to the technical field of medical instruments, and discloses a water injection planing tool bit and a planing planer, the water injection planing tool bit comprises an inner tool tube, an inner tool bit, an outer tool tube, an outer tool bit and a tool apron, the inner tool tube is fixedly communicated with the inner tool bit, the outer tool tube is fixedly communicated with the outer tool bit, and the inner tool bit is fixedly communicated with the outer tool tube. Mutually communicated gaps are formed between the inner tool bit and the outer tool bit as well as between the inner tool tube and the outer tool tube; planing windows are formed in the inner tool bit and the outer tool bit; the knife holder comprises an outer knife holder body and an inner knife holder body, the outer knife tube is fixedly connected with the outer knife holder body, the inner knife tube is fixedly connected with the inner knife holder body, the inner knife holder body is rotationally connected with the outer knife holder body, and an outer water injection hole communicated with a gap between the inner knife tube and the outer knife tube is formed in the outer knife holder body. The planer tool comprises a planer tool handle and a water injection planing tool bit. According to the utility model, external water injection can be carried out during planing, so that the purposes of wetting and cooling the tool bit and improving the operation efficiency are achieved.

Description

Technical Field

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

[0002] Medical planer is a tool used in minimally invasive endoscopic surgery. It is a surgical power device used to plane biological bone tissue and / or soft tissue in surgery, orthopedics, otolaryngology, and cosmetic surgery. Its planing head consists of an inner rotating part and an outer fixed part with a window. The medical planer is connected to the 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] In some planing environments such as the ear, nose, throat and joints, there is no water in the cutting environment of the planer, which may cause the soft tissue to block the negative pressure channel after being cut; and, without the nourishment of water during cutting, the purpose of wetting and cooling the blade head cannot be achieved; in addition, when the existing planers have strong toughness in the fascia tissue in the surgical area or a large amount of tissue needs to be planed in a short time, it is easy for the planed tissue to not be cut, the fascia tissue to be entangled with the blade head, and the tissue to be blocked at the connection between the blade head and the blade tube or in the middle and rear part of the blade tube, affecting the efficiency of the operation. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a water-injected planing cutter head and a planing cutter, which can externally inject water during planing to achieve the purpose of wetting and cooling the cutter head and improving surgical efficiency.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In the first aspect, the utility model discloses a water-injected planing tool head, comprising an inner tool tube, an inner tool head, an outer tool tube, an outer tool head and a tool seat, wherein the inner tool tube is fixedly connected to the inner tool head, the outer tool tube is fixedly connected to the outer tool head, the inner tool head and the outer tool head, the inner tool tube and the outer tool tube have mutually connected gaps, and the inner tool head and the outer tool head are provided with planing windows; the tool seat comprises an outer tool seat and an inner tool seat, the outer tool tube is fixedly connected to the outer tool seat, the inner tool tube is fixedly connected to the inner tool seat, the inner tool seat is rotatably connected to the outer tool seat, and the outer tool seat is provided with an external water injection hole connected to the gap between the inner tool tube and the outer tool tube.

[0007] Furthermore, a first stepped hole is axially provided on the outer knife seat, one end of the outer knife tube away from the outer knife head is fixedly connected to the inner wall of the small hole of the first stepped hole, and the inner knife seat is rotatably provided 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 knife tube, the outer water injection hole penetrates from the outside to the water flow channel, the water flow channel is connected with the gap between the outer knife tube and the inner knife tube, a first sealing ring is provided at the bottom of the large hole of the first stepped hole, and the inner knife tube passes through the first sealing ring. This technical solution enables the water-injected planing tool head to be injected with water through the outer water injection hole; when in use, the injected water flows into the outer water injection hole of the outer knife seat through the matching handle, then enters the water flow channel, passes through the gap between the outer knife tube and the inner knife tube, and finally flows out from the gap between the outer knife head and the inner knife head, moistening the planing part and cooling the entire planing tool head, which is also conducive to improving the surgical efficiency.

[0008] Furthermore, a second stepped hole is axially penetrated on the inner tool holder, and 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 first 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, which is connected to the inner tool head to realize the rotational movement of the inner tool head; the elastic member of this solution is preferably a spring, which has a better effect.

[0009] 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.

[0010] Furthermore, an outer arc segment is provided on a portion of the outer knife tube close to the outer knife head, and an inner arc segment is provided on a portion of the inner knife tube close to the inner knife head. The outer arc segment and the inner arc segment overlap in position and are the same segment, and the inner arc segment is a soft structure.

[0011] Furthermore, the inner arc section is an undulating helical spring tube formed by spiral winding, and adjacent spiral units of the undulating helical spring tube are interlocked in a concave-convex matching manner.

[0012] Furthermore, the edge lines between adjacent spiral units of the undulating spiral spring tube are mutually embedded rectangular or inverted trapezoidal undulating lines.

[0013] Furthermore, sealing grooves are provided on the outer walls of the outer knife seat on both sides of the outer water injection hole, and a third sealing ring is provided in the sealing groove. When the planing cutter head is connected to the handle, the injected water enters the outer water injection hole of the outer knife seat through the handle. The provision of the third sealing ring can prevent the outer water injection hole from overflowing, thereby making the surgical environment better.

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

[0015] In a second aspect, the utility model further discloses a planer, which comprises a planer handle and the above-mentioned water injection planing tool head.

[0016] Beneficial effects of the utility model:

[0017] 1. When the utility model is used, water can be injected from the external water injection hole through the external handle, the injected water enters the water flow channel, 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 achieving the purpose of wetting and cooling the knife head.

[0018] 2. In the utility model, when the outer blade head and the inner blade head cut the soft tissue, the soft tissue enters the pipeline of the inner blade tube together with the water after being cut, and the external handle of the inner blade tube is generally connected to a negative pressure suction device. Under the negative pressure suction, the soft tissue and water are mixed and then taken out through the pipeline of the inner blade tube. In this process, because the soft tissue is diluted by water, it is not easy to block the pipeline of the inner blade tube, thereby improving the surgical efficiency.

[0019] 3. The utility model sets the part of the outer knife tube close to the outer knife head as an outer arc section, and the part of the inner knife tube close to the inner knife head as an inner arc section. The inner arc section is a soft structure that can transmit torque, so that the inner knife tube drives the inner knife head to rotate; during surgery, the knife head part of the water-injected planer is curved, which can adapt to surgeries in different angles and environments, has a wider range of use, and is more convenient for surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a water injection planing cutter head of the utility model;

[0021] Figure 2 for Figure 1 Exploded diagram of

[0022] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of;

[0023] Figure 4 for Figure 3A schematic diagram of the local enlarged structure at point A in the middle;

[0024] Figure 5 for Figure 3 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 inner tool holder;

[0026] Figure 7 for Figure 2 Schematic diagram of the structure of the inner cutter head.

[0027] Among them, there are inner knife tube 1, inner knife head 2, outer knife tube 3, outer knife head 4, planing window 5, tooth cutting edge 6, outer knife seat 7, inner knife seat 8, external water injection hole 9, first stepped hole 10, water flow channel 11, first sealing ring 12, stopper sleeve 13, second stepped hole 14, elastic member 15, second sealing ring 16, liner 17, sealing groove 18, third sealing ring 19, outer arc segment 20, inner arc segment 21, and undulating spiral line 22. DETAILED DESCRIPTION

[0028] The utility model will be described in detail below with reference to the accompanying drawings:

[0029] Embodiment 1,

[0030] like Figure 1 to Figure 7 As shown: This embodiment is a water-injected planing tool head, comprising an inner tool tube 1, an inner tool head 2, an outer tool tube 3, an outer tool head 4 and a tool seat, the inner tool tube 1 is fixedly connected to the inner tool head 2, the outer tool tube 3 is fixedly connected to the outer tool head 4, the inner tool head 2 and the outer tool head 4, the inner tool tube 1 and the outer tool tube 3 have mutually connected gaps, the inner tool head 2 and the outer tool head 4 are each provided with a planing window 5, and the edge of the planing window 5 is provided with a tooth cutting edge 6; the tool seat comprises an outer tool seat 7 and an inner tool seat 8, the outer tool tube 3 is fixedly connected to the outer tool seat 7, the inner tool tube 1 is fixedly connected to the inner tool seat 8, the inner tool seat 8 is rotatably connected to the outer tool seat 7, and the outer tool seat 7 is provided with an external water injection hole 9 connected to the gap between the inner tool tube 1 and the outer tool tube 3.

[0031] A first stepped hole 10 is axially penetrated on the outer tool holder 7, one end of the outer tool tube 3 away from the outer tool head 4 is fixedly connected to the inner wall of the small hole of the first stepped hole 10, and the inner tool holder 8 is rotatably arranged 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, and the external water injection hole 9 penetrates from the outside to the water flow channel 11, and the water flow channel 11 is connected with the gap between the outer tool tube 3 and the inner tool tube 1, and a first sealing ring 12 is provided at the bottom of the large hole of the first stepped hole 10, and the inner tool tube 1 passes through the first sealing ring 12, and a stop sleeve 13 is fixed on the inner wall of the large hole of the first stepped hole 10, and the two ends of the first sealing ring 12 are respectively abutted against the bottom of the large hole of the first stepped hole 10 and the end of the stop sleeve 13. The first sealing ring 12 of this embodiment is a lip sealing ring, and in practice it can also be other O-type sealing rings that can play a sealing role.

[0032] A second stepped hole 14 is axially penetrated on the inner knife seat 8, and an elastic member 15 and a second sealing ring 16 are arranged in the large hole of the second stepped hole 14, one end of the elastic member 15 is against the bottom of the large hole of the second stepped hole 14, and the other end of the elastic member 15 is against the second sealing ring 16; a liner 17 is sleeved on the end of the inner knife tube 1 away from the inner knife head 2, one end of the liner 17 is rotatably arranged on the inner ring of the first sealing ring 12, and the other end of the liner 17 passes through the small hole of the second stepped hole 14, the elastic member 15 and the second sealing ring 16 in sequence, and is fixedly arranged on the inner ring of the second sealing ring 16. The elastic member 15 of this embodiment is preferably a spring, and in practice, it can also be an elastic rubber ring. Sealing grooves 18 are arranged on the outer walls of the outer knife seat 7 on both sides of the outer water injection hole 9, and a third sealing ring 19 is arranged in the sealing groove 18.

[0033] An outer arc segment 20 is provided on the portion of the outer knife tube 3 close to the outer knife head 4, and an inner arc segment 21 is provided on the portion of the inner knife tube 1 close to the inner knife head 2. The outer arc segment 20 and the inner arc segment 21 overlap in position as the same segment. The inner arc segment 21 is a spring tube with an undulating spiral line 22 formed by spiral winding. Adjacent spiral units of the spring tube with the undulating spiral line 22 are fitted with each other in a concave-convex matching manner. The edge lines between adjacent spiral units of the spring tube with the undulating spiral line 22 are mutually fitted rectangular or inverted trapezoidal undulating lines, which are inverted trapezoidal undulating lines in the present embodiment and are formed by laser cutting.

[0034] The use process of the utility model is as follows:

[0035] When in use, power is transmitted from the inner blade holder 8 through an externally connected handle, and then transmitted to the liner 17 after passing through the inner blade holder 8. The liner 17 is connected to the inner blade tube 1, and the inner blade tube 1 is connected to the inner blade head 2, so that the inner blade head 2 can rotate, and the inner blade head 2 cooperates with the outer blade head 4 to perform planing. Because the planer head of this embodiment sets the outer blade tube 3 close to the outer blade head 4 as an outer arc segment 20, and the inner blade tube 1 close to the inner blade head 2 as an inner arc segment 21, the inner arc segment 21 is a soft structure that can transmit torque, so that the inner blade tube 1 drives the inner blade head 2 to rotate; during surgery, the blade head of this water injection planer is curved, which can adapt to surgeries in different angle environments, has a wider range of use, and is more convenient for surgical operations.

[0036] During the planing process, water can be injected from the external water injection hole 9 through the external handle, 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 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 and the operation efficiency is improved.

[0037] Embodiment 2,

[0038] This embodiment is a planer, which includes a planer handle and the water-injected planer head of the above-mentioned embodiment 1. The water-injected planer head is connected to the planer handle through an inner tool seat 8.

[0039] 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 water injection planing tool head, comprising an inner tool tube, an inner tool head, an outer tool tube, an outer tool head and a tool seat, wherein the inner tool tube is fixedly connected to the inner tool head, the outer tool tube is fixedly connected to the outer tool head, the inner tool head and the outer tool head, the inner tool tube and the outer tool tube are all provided with mutually connected gaps, and the inner tool head and the outer tool head are both provided with planing windows; characterized in that: The knife seat includes an outer knife seat and an inner 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, the inner knife seat is rotatably connected to the outer knife seat, and the outer knife seat is provided with an external water injection hole connected to the gap between the inner knife tube and the outer knife tube.

2. A water injection planing cutter head according to claim 1, 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, the external water injection hole penetrates from the outside to the water flow channel, 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.

3. A water injection planing cutter head according to claim 2, 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 first 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.

4. A water injection planing cutter head according to claim 2 or 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 water injection planing cutter head according to claim 1, characterized in that: An outer arc section is arranged on the portion of the outer knife tube close to the outer knife head, and an inner arc section is arranged on the portion of the inner knife tube close to the inner knife head. The outer arc section and the inner arc section overlap in position and are the same section. The inner arc section is a soft structure.

6. A water injection planing cutter head according to claim 5, characterized in that: The inner arc section is an undulating helical spring tube formed by spiral winding, and adjacent spiral units of the undulating helical spring tube are interlocked in a concave-convex matching manner.

7. A water injection planing cutter head according to claim 6, characterized in that: The edge lines between adjacent spiral units of the undulating spiral spring tube are mutually embedded rectangular or inverted trapezoidal undulating lines.

8. The water injection planing tool head according to claim 1, characterized in that: Sealing grooves are arranged on the outer walls of the outer knife seat at both sides of the outer water injection hole, and a third sealing ring is arranged in the sealing groove.

9. The water injection planing tool head according to claim 1, characterized in that: The edges of the planing windows of the inner cutter head and the outer cutter head are both provided with tooth cutting edges.

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

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