Planer tool assembly capable of externally injecting water and planer tool

Abstract

The utility model relates to the technical field of medical instruments, and discloses a planer tool component and a planer tool capable of injecting water externally, the planer tool component comprises an inner tube component, a middle tube component and an outer tube, the inner tube component comprises an inner tube and an inner tool bit, and the inner tube is fixedly communicated with the inner tool bit; the middle pipe part comprises a middle pipe and an outer tool bit, and the middle pipe is fixedly communicated with the outer tool bit; the inner tool bit is rotationally arranged in the outer tool bit, the inner pipe is rotationally arranged in the middle pipe, the outer pipe is arranged on the middle pipe and the outer tool bit in a sleeving mode, and the end, close to the outer tool bit, of the outer pipe is fixed to the outer tool bit; a gap is formed between the outer pipe and the middle pipe and between the outer pipe and the outer tool bit, and a first water injection hole communicated with the inner pipe is formed in the portion, located in the gap, of the outer tool bit. Water can be injected into the tool bit of the planer tool, the purpose of wetting and cooling the tool bit is achieved, and cut soft tissue is prevented from blocking a negative pressure channel.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a shaving knife assembly and a shaving knife capable of externally injecting water. Background Art

[0002] A shaving knife is a tool often used in minimally invasive endoscopic surgeries, mainly for shaving soft tissues in surgical operations such as otolaryngology, joints, urology, and gynecology. Through a negative pressure suction pipe connected to a negative pressure suction device, negative pressure is transmitted to the front end through a hollow tool, sucking the soft tissue into the cutting edge. The outer barrel of the tool is fixed, and the tool makes a reciprocating rotational motion driven by a motor, so that the cutting end of the tool cuts off the soft tissue.

[0003] In some shaving use environments such as otolaryngology and joints, there is no water in the cutting environment of the shaving knife, which may cause the soft tissue to block the negative pressure channel after being cut; moreover, without the moistening of water during cutting, the purpose of wetting and cooling the tool head cannot be achieved. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a shaving knife assembly and a shaving knife capable of externally injecting water, which can inject water into the tool head part of the shaving knife to achieve the purpose of wetting and cooling the tool head and prevent the problem that the soft tissue after cutting blocks the negative pressure channel.

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

[0006] In a first aspect, the utility model discloses a shaving knife assembly capable of externally injecting water, including an inner tube component, an intermediate tube component, and an outer tube. The inner tube component includes an inner tube and an inner tool head, and the inner tube is fixedly communicated with the inner tool head; the intermediate tube component includes an intermediate tube and an outer tool head, and the intermediate tube is fixedly communicated with the outer tool head; the inner tool head is rotatably arranged inside the outer tool head, the inner tube is rotatably arranged inside the intermediate tube, the outer tube is sleeved on the intermediate tube and the outer tool head, and one end of the outer tube close to the outer tool head is fixed to the outer tool head; a gap is provided between the outer tube and the intermediate tube and the outer tool head, and a first water injection hole communicated with the inner tube is provided on the part of the outer tool head located in the gap.

[0007] In this technical solution, the external injection water can enter the gap between the outer pipe, the middle pipe and the outer cutter head. Then the water reaches the first water injection hole through the gap. The water then passes through the first water injection hole and enters the gap between the outer cutter head and the inner cutter head to achieve the purpose of wetting and cooling the cutter head. The outer cutter head and the inner cutter head rotate reciprocally relative to each other driven by an external power to cut soft tissue. After the soft tissue is cut, it enters the pipeline of the inner pipe together with the water. Generally, the inner pipe is externally connected to a negative pressure suction device. Under the suction of the negative pressure, the mixture of the soft tissue and the water passes through the pipeline of the inner pipe and is taken out. In this process, because the soft tissue is diluted by the water, it is not easy to block the pipeline of the inner pipe, making the operation proceed smoothly.

[0008] Further, a first soft spring section is provided on the middle pipe, and a second soft spring section is provided on the inner pipe. The first soft spring section is sleeved outside the second soft spring section. In this technical solution, the first soft spring section is provided on the middle pipe and the second soft spring section is provided on the inner pipe, which can make the inner pipe and the middle pipe be bent into a certain arc during processing to adapt to surgeries in different angular environments. Moreover, the second soft spring section on the inner pipe can also transmit torque to drive the inner cutter head to rotate.

[0009] Further, a sealing pipe is hermetically sleeved on the first soft spring section. In this technical solution, the sealing pipe is sleeved on the first soft spring section. In practice, it can be a thermoplastic pipe or other plastic pipes that can play a sealing role. When the thermoplastic pipe is heated, it can tightly sleeve on the first soft spring section, thereby sealing the gap on the first soft spring section. In this way, it can be avoided that the water passing through the gap between the outer pipe and the middle pipe enters the annulus between the middle pipe and the inner pipe and the suction channel of the inner pipe, which can not only avoid the loss of the injected water but also avoid the loss of the suction force of the suction channel.

[0010] Further, a front adapter sleeve is fixedly sleeved at one end of the outer pipe away from the outer cutter head. A first stepped hole is opened at one end of the front adapter sleeve close to the outer cutter head. There is a water flow channel between the inner wall of the large hole of the first stepped hole and the middle pipe. The water flow channel is communicated with the gap. A second water injection hole communicated with the water flow channel is opened on the front adapter sleeve, and a water injection pipeline is communicated with the second water injection hole. In this technical solution, the external injected water can first enter the second water injection hole through the water injection pipeline, then pass through the second water injection hole and enter the water flow channel, and finally enter the gap between the middle pipe and the outer pipe to achieve the purpose of smooth water flow.

[0011] Further, a second stepped hole is formed at one end of the front adapter sleeve away from the outer cutter head, and the first stepped hole communicates with the second stepped hole; a bearing is arranged in the large hole of the second stepped hole, a bushing is fixedly connected to the inner ring of the bearing, a gear adapter sleeve is fixedly connected to the inner ring of the bushing, and one end of the inner tube away from the inner cutter head passes through the gear adapter sleeve and is fixedly connected to the gear adapter sleeve. In this technical solution, the gear adapter sleeve can be connected to an external power mechanism, and the external power mechanism drives it to rotate, and then drives the inner tube to rotate. The setting of the bearing makes the friction of the entire rotating mechanism smaller and the noise smaller.

[0012] Further, a sealing ring is arranged between the bottom of the second stepped hole and the bearing. The end of the intermediate tube away from the outer cutter head abuts against the sealing ring, and the gear adapter sleeve is hermetically fixed through the sealing ring. In this technical solution, the setting of the sealing ring can effectively seal the water entering the water flow channel and prevent water from entering the tail end of the front adapter sleeve.

[0013] Further, one end of the water injection pipeline is connected with a water injection joint, the other end of the water injection pipeline is connected with a tapered joint, and the water injection joint is connected to the second water injection hole. In this way, the external water source and the second water injection hole can be connected through the water injection pipeline.

[0014] Further, an avoidance structure is arranged at the first water injection hole of the outer cutter head, and the first water injection hole is arranged on the avoidance structure. In this technical solution, the setting of the avoidance structure can make the space at the water inlet position of the first water injection hole larger, which is beneficial to guiding the water coming from the gap into the first water injection hole.

[0015] Further, window structures are formed on both the inner cutter head and the outer cutter head, and a plurality of tooth edge blades are arranged on the edges of the window structures. In this technical solution, a rotational shearing effect is formed between the tooth edge blades of the inner cutter head and the outer cutter head, which is more conducive to cutting the soft tissue sucked in by negative pressure and preventing larger pieces of soft tissue from entering the inner tube or the suction pipe and causing blockage.

[0016] In a second aspect, the present invention also discloses a planing cutter, which includes a planing cutter body and the above-mentioned planing cutter assembly.

[0017] The beneficial effects of the present invention:

[0018] 1. When the present invention is used, external water injection can enter the second water injection hole through the water injection pipeline, then enter the flowing water channel, and then enter the gap between the outer tube, the intermediate tube and the outer cutter head. The water reaches the first water injection hole through the gap, and finally enters the gap between the outer cutter head and the inner cutter head through the first water injection hole, so as to achieve the purpose of wetting and cooling the cutter head.

[0019] 2. The outer cutter head and the inner cutter head of the present utility model cut soft tissues. After being cut, the soft tissues enter the pipeline of the inner tube together with water. Generally, a negative pressure suction device is externally connected to the inner tube. Under the suction of the negative pressure, the mixture of the soft tissues and water is taken out through the pipeline of the inner tube. In this process, because the soft tissues are diluted by water, it is not easy for them to block the pipeline of the inner tube, enabling the operation to proceed smoothly.

[0020] 3. A rotational shearing effect is formed between the tooth edges of the inner cutter head and the outer cutter head of the present utility model, which is beneficial to cutting off the soft tissues sucked in by the negative pressure and avoiding larger pieces of soft tissues from entering the inner tube or the suction pipe, further reducing the possibility of blockage.

[0021] 4. The present utility model is provided with a first soft spring section on the middle tube and a second soft spring section on the inner tube, which can make the inner tube and the middle tube be bent into a certain arc during processing, can adapt to surgeries in different angular environments, and can also transmit torque; and a sealing tube is sleeved on the first soft spring section in a sealed manner to seal the gaps on the first soft spring section, thereby avoiding the water passing through the gap between the outer tube and the middle tube from entering the annulus between the middle tube and the inner tube and the suction channel of the inner tube, which can not only avoid the loss of the injected water but also avoid the loss of the suction force of the suction channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a planing cutter assembly with external water injection of the present utility model;

[0023] Figure 2 is Figure 1 an exploded view of

[0024] Figure 3 is Figure 1 a schematic cross-sectional structure diagram of

[0025] Figure 4 is Figure 3 a partial structure diagram at A in

[0026] Figure 5 is Figure 3 a partial structure diagram at B in

[0027] Figure 6 is Figure 2 a schematic structure diagram of the middle tube component;

[0028] Figure 7 is Figure 6 a partial structure diagram at C in

[0029] Figure 8 is Figure 2 a schematic structure diagram of the front adapter sleeve in

[0030] Among them, the inner cutter head 1, inner tube 2, intermediate tube 3, outer cutter head 4, outer tube 5, first water injection hole 6, avoidance structure 7, window structure 8, tooth edge 9, first soft spring section 10, second soft spring section 11, sealing tube 12, front adapter sleeve 13, water flow channel 14, second water injection hole 15, water injection pipeline 16, water injection joint 17, conical joint 18, gear adapter sleeve 19, bushing 20, bearing 21, sealing ring 22. Detailed implementation mode

[0031] The present utility model will be described in detail below with reference to the accompanying drawings:

[0032] Embodiment 1

[0033] As Figure 1-8 shown, this embodiment is a planer cutter assembly capable of external water injection, including an inner tube component, an intermediate tube component and an outer tube 5. The inner tube component includes an inner tube 2 and an inner cutter head 1, and the inner tube 2 is fixedly communicated with the inner cutter head 1; the intermediate tube component includes an intermediate tube 3 and an outer cutter head 4, and the intermediate tube 3 is fixedly communicated with the outer cutter head 4; the inner cutter head 1 is rotatably arranged inside the outer cutter head 4, the inner tube 2 is rotatably arranged inside the intermediate tube 3, the outer tube 5 is sleeved on the intermediate tube 3 and the outer cutter head 4, and the left end of the outer tube 5 is hermetically fixed to the outer cutter head 4; there is a gap between the outer tube 5 and the intermediate tube 3 and the outer cutter head 4, and a first water injection hole 6 communicated with the inner tube 2 is arranged on the part of the outer cutter head 4 located in the gap; an avoidance structure 7 is arranged at the first water injection hole 6 of the outer cutter head 4, the first water injection hole 6 is arranged on the avoidance structure 7, and the avoidance structure 7 can be a flat side, a groove or a step arranged on the outer cutter head 4, etc. In this embodiment, it is a flat side arranged on the outer cutter head 4, that is, a plane is arranged at the first water injection hole 6 of the outer cutter head 4. Window structures 8 are opened on both the inner cutter head 1 and the outer cutter head 4, and a plurality of tooth edges 9 are arranged on the edges of the window structures 8.

[0034] A first soft spring section 10 is arranged on the intermediate tube 3, a second soft spring section 11 is arranged on the inner tube 2, the first soft spring section 10 is sleeved outside the second soft spring section 11, and a sealing tube 12 is hermetically sleeved on the first soft spring section 10. The sealing tube 12 in this embodiment is a thermoplastic tube.

[0035] A front adapter sleeve 13 is fixedly sleeved on the right end of the outer tube 5. A first stepped hole is opened at the left end of the front adapter sleeve 13. There is a water flow channel 14 between the intermediate tube 3 and the inner wall of the large hole of the first stepped hole, and the water flow channel 14 is communicated with the gap; a second water injection hole 15 communicated with the water flow channel 14 is opened on the front adapter sleeve 13. A water injection pipeline 16 is communicated with the second water injection hole 15. The left end of the water injection pipeline 16 is connected with a water injection joint 17, and the right end of the water injection pipeline 16 is connected with a conical joint 18, and the water injection joint 17 is connected to the second water injection hole 15.

[0036] A second stepped hole is provided at the right end of the front adapter sleeve 13, and the first stepped hole communicates with the second stepped hole; a bearing 21 is arranged in the large hole of the second stepped hole, the inner ring of the bearing 21 is fixedly connected with a bushing 20, the inner ring of the bushing 20 is fixedly connected with a gear adapter sleeve 19, and the right end of the inner tube 2 passes through the gear adapter sleeve 19 and is fixedly connected with the gear adapter sleeve 19. A sealing ring 22 is arranged between the bottom of the second stepped hole and the bearing 21, the right end of the middle tube 3 abuts against the sealing ring 22, and the gear adapter sleeve 19 is hermetically fixed through the sealing ring 22.

[0037] The usage method of the present utility model is as follows:

[0038] Before the present utility model is used, the gear adapter sleeve 19 can be connected to an external power system (such as a gear reduction mechanism driven by a motor), the tapered joint 18 is connected to an external water source (such as a peristaltic pump), and an external negative pressure suction device (such as a suction pump) is connected to the right end of the inner tube 2.

[0039] During the operation, one end of the outer cutter head 4 is inserted into the operation site, and the window structures 8 of the outer cutter head 4 and the inner cutter head 1 are aligned with the soft tissue to be planed; at this time, the suction device evacuates the inner tube 2 to suck the soft tissue into the window structures 8 of the inner cutter head 1 and the outer cutter head 4.

[0040] At the same time, the external water source can enter the second water injection hole 15 through the water injection pipeline 16, then enter the water flow channel 14, and then enter the gap between the outer tube 5, the middle tube 3 and the outer cutter head 4. The water reaches the first water injection hole 6 through the gap, and finally the water enters the gap between the outer cutter head 4 and the inner cutter head 1 through the first water injection hole 6 to achieve the purpose of wetting and cooling the cutter head.

[0041] The external power system drives the gear adapter sleeve 19 and the inner tube 2 to rotate. The rotation of the inner tube 2 transmits the torque to the inner cutter head 1. The inner cutter head 1 rotates while the outer cutter head 4 is stationary, and a rotational shearing effect is formed between the tooth edges 9 of the inner cutter head 1 and the outer cutter head 4; the soft tissue is planed by using the rotational shearing formed between the tooth edges 9 of the inner cutter head 1 and the outer cutter head 4.

[0042] The planed soft tissue and water enter the inner tube 2 under the action of negative pressure and are finally sucked out by the negative pressure device. During this process, because the soft tissue is diluted by water, it is not easy to block the pipeline of the inner tube 2, making the operation proceed smoothly.

[0043] A first soft spring section 10 is provided on the intermediate tube 3 of this embodiment, and a second soft spring section 11 is provided on the inner tube 2. This enables the inner tube 2 and the intermediate tube 3 to be bent into a certain arc during processing, can adapt to surgeries in different angular environments, and can also transmit torque. And a sealing tube 12 is sleeved on the first soft spring section 10 in a sealed manner to seal the gaps on the first soft spring section 10, thereby preventing water passing through the gap between the outer tube 5 and the intermediate tube 3 from entering the annulus between the intermediate tube 3 and the inner tube 2 and the suction channel of the inner tube 2. This can not only avoid the loss of the injected water but also avoid the loss of the suction force of the suction channel.

[0044] Embodiment 2

[0045] This embodiment is a planer, and the planer includes a planer body and the planer assembly of the above-mentioned Embodiment 1.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. An externally water-injectable planer blade assembly, characterized in that: It includes an inner tube component, an intermediate tube component and an outer tube. The inner tube component includes an inner tube and an inner cutter head, and the inner tube is fixedly communicated with the inner cutter head; the intermediate tube component includes an intermediate tube and an outer cutter head, and the intermediate tube is fixedly communicated with the outer cutter head; the inner cutter head is rotatably arranged inside the outer cutter head, the inner tube is rotatably arranged inside the intermediate tube, the outer tube is sleeved on the intermediate tube and the outer cutter head, and one end of the outer tube close to the outer cutter head is fixed to the outer cutter head; there is a gap between the outer tube and the intermediate tube and the outer cutter head, and a first water injection hole communicated with the inner tube is arranged on the part of the outer cutter head located in the gap.

2. The externally water-injectable planer blade assembly according to claim 1, wherein: A first soft spring section is arranged on the intermediate tube, and a second soft spring section is arranged on the inner tube. The first soft spring section is sleeved outside the second soft spring section.

3. The externally water-injectable planer blade assembly according to claim 2, wherein: A sealing tube is hermetically sleeved on the first soft spring section.

4. The planer blade assembly capable of external water injection according to claim 1, wherein: A front adapter sleeve is fixedly sleeved at one end of the outer tube far from the outer cutter head. A first stepped hole is opened at one end of the front adapter sleeve close to the outer cutter head. There is a water flow channel between the intermediate tube and the inner wall of the large hole of the first stepped hole, and the water flow channel is communicated with the gap; a second water injection hole communicated with the water flow channel is opened on the front adapter sleeve, and a water injection pipeline is communicated with the second water injection hole.

5. The planer blade assembly capable of external water injection according to claim 4, characterized in that: A second stepped hole is opened at one end of the front adapter sleeve far from the outer cutter head, and the first stepped hole is communicated with the second stepped hole; a bearing is arranged in the large hole of the second stepped hole. The inner ring of the bearing is fixedly connected with a bushing, and the inner ring of the bushing is fixedly connected with a gear adapter sleeve. One end of the inner tube far from the inner cutter head passes through the gear adapter sleeve and is fixedly connected with the gear adapter sleeve.

6. The shaving cutter assembly capable of external water injection according to claim 5, wherein: A sealing ring is arranged between the bottom of the second stepped hole and the bearing. The end of the intermediate tube far from the outer cutter head abuts against the sealing ring, and the gear adapter sleeve hermetically passes through the sealing ring.

7. The planer blade assembly capable of external water injection according to claim 4, characterized in that: One end of the water injection pipeline is connected with a water injection joint, and the other end of the water injection pipeline is connected with a tapered joint. The water injection joint is connected to the second water injection hole.

8. The planer blade assembly capable of external water injection according to claim 1, wherein: An avoidance structure is arranged at the first water injection hole of the outer cutter head, and the first water injection hole is arranged on the avoidance structure.

9. The planer blade assembly capable of external water injection according to claim 1, wherein: Window structures are opened on both the inner cutter head and the outer cutter head, and a plurality of tooth edge cutters are arranged on the edges of the window structures.

10. A planer tool, characterized in that: The planer includes a planer body and the planer component according to any one of claims 1-9.

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