An eccentric cutter

Abstract

The utility model relates to the field of medical apparatus and instruments, disclose a eccentric cutter, including base, first eccentric support seat, outer tube, second eccentric support seat, support inner tube, cutter head subassembly and suction passage, first eccentric support seat is installed to base, one end of outer tube is installed to first eccentric support seat, second eccentric support seat is installed to the one end of outer tube away from first eccentric support seat, and second eccentric support seat has gourd shape through -hole, support inner tube penetrates outer tube, one end is installed to first eccentric support seat, and the other end is installed to the support portion of gourd shape through -hole, cutter head subassembly includes cutter head part and transmission shaft, transmission shaft penetrates support inner tube, and rotatably is installed in support inner tube, the utility model separates cutter head subassembly and suction passage completely, on one hand makes cutter head part can high -speed rotation, promotes the operation efficiency, on the other hand can also strengthen the stability of cutter whole, promotes the security of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an eccentric cutting tool. Background Technology

[0002] In clinical practice, medical staff often use special surgical instruments to assist in the proper conduct of surgical procedures. These include planing instruments for cutting soft tissues and grinding instruments for grinding bone tissue. These surgical instruments typically have a negative pressure suction function, which can aspirate waste fluids and tissues generated during the procedure to the outside, thus ensuring the smooth execution of the surgery.

[0003] As disclosed in application number 202323516241.5, a planer cutter head assembly and planer blade include an inner cutter head, an inner cutter tube, an outer cutter head, and an outer cutter tube. The inner cutter head is fixed to the inner cutter tube, and the outer cutter head is fixed to the outer cutter tube. The inner cutter head is fitted inside the outer cutter head, and the inner cutter tube is fitted inside the outer cutter tube. The inner cutter tube can rotate relative to the outer cutter tube to drive the inner cutter head to rotate relative to the outer cutter head. Simultaneously, a suction channel is designed inside the inner cutter tube, meaning the inner cutter tube and the suction channel are an integral structure.

[0004] However, the integrated design of the inner blade tube and suction channel limits the speed at which the inner blade tube can rotate. Excessive rotation would compromise the sealing performance of the tube connections. Therefore, these types of blades generally have low tip speeds, resulting in lower surgical efficiency. Furthermore, the blade tube exhibits significant vibration, reducing overall blade stability and increasing surgical risks. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide an eccentric cutting tool to solve the problem mentioned in the background art, where the inner blade tube and suction channel are designed as an integral structure in the prior art, resulting in a generally low blade head rotation speed and thus low surgical efficiency.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] Base;

[0008] A first eccentric support seat, one end of which is mounted to the base;

[0009] The outer tube, one end of which is installed to the first eccentric support;

[0010] The second eccentric support is installed at the end of the outer tube away from the first eccentric support, and the second eccentric support has a gourd-shaped through hole.

[0011] The inner support tube passes through the outer tube, with one end installed to the first eccentric support seat and the other end installed to the gourd-shaped through hole.

[0012] A cutter head assembly, comprising a cutter head and a drive shaft, the drive shaft passing through the inner support tube and rotatably mounted in the inner support tube, the cutter head being fixed to one end of the drive shaft;

[0013] A suction channel is provided between the outer tube and the inner support tube, with one end connected to the suction inlet of the gourd-shaped through hole, and the inner support tube is eccentrically placed relative to the outer tube.

[0014] In one possible implementation, the cutter head assembly further includes an input shaft rotatably mounted within the base, and the input shaft and the cutter head are coaxially connected via the drive shaft.

[0015] In one possible implementation, a portion of the inner wall of the first eccentric support and a portion of the outer wall of the inner support tube form a transition channel, the transition channel being connected to the end of the suction channel away from the gourd-shaped through hole, and the first eccentric support having a suction outlet connected to the transition channel.

[0016] In one possible implementation, the base has a connecting channel, one end of which is connected to the suction outlet, and the other end is fitted with a suction tube.

[0017] In one possible implementation, a suction switch for controlling the opening and closing of the connection channel is installed on the base.

[0018] In one possible implementation, the suction switch includes a valve core and a rotating part. The valve core has a valve hole and is installed in the connection channel to block the connection channel. One end of the rotating part is connected to the valve core, and the other end is rotatably mounted on the outside of the base.

[0019] In one possible implementation, a sealing ring is installed between the rotating part and the base.

[0020] In one possible implementation, a baffle is provided at the end of the second eccentric support away from the outer tube, and the baffle is located on one side of the cutter head.

[0021] In one possible implementation, a bearing is installed inside the first eccentric support, one end of the input shaft passes through the bearing, and is rotatably mounted on the first eccentric support via the bearing.

[0022] In one possible implementation, an inner sleeve is also installed between the supporting inner tube and the drive shaft.

[0023] The beneficial effects of this utility model are:

[0024] 1. Through the technical solution of this application, the drive shaft can rotate unidirectionally within the inner support tube, thereby driving the blade head to rotate. The two ends of the inner support tube are fixed by a first eccentric support seat and a second eccentric support seat, respectively. The second eccentric support seat has a gourd-shaped through hole, serving as both support and a suction inlet. A suction channel is formed between the outer tube and the inner support tube, allowing waste liquid to be drawn from the suction inlet of the second eccentric support seat into the suction channel, and finally drawn through the base into an external waste liquid collector. This design completely separates the blade head assembly from the suction channel, ensuring that the suction of waste liquid does not affect the rotation of the blade head assembly, allowing the blade head to rotate at high speed and improving surgical efficiency. It also enhances the overall stability of the blade, thereby improving surgical safety.

[0025] 2. In this application, the inner support tube is eccentrically positioned relative to the outer tube, which allows the suction channel to pass through impurities with larger particle sizes, reducing the risk of blockage in the suction channel. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the eccentric tool in an embodiment of this application;

[0028] Figure 2 This is an embodiment of the present application. Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is an embodiment of the present application. Figure 1 Enlarged view of point B in the middle;

[0030] Figure 4 This is a schematic diagram of the structure of the second eccentric support in the embodiments of this application;

[0031] Figure 5 This is an exploded view of the eccentric tool in an embodiment of this application;

[0032] Reference numerals: 100, base; 110, connecting channel; 120, suction tube; 121, connector; 130, suction switch; 131, valve core; 132, rotating part; 140, sealing ring; 200, first eccentric support; 210, transition channel; 220, suction outlet; 230, bearing; 300, outer tube; 400, second eccentric support; 410, gourd-shaped through hole; 411, support part; 412, suction inlet; 420, baffle; 500, inner support tube; 510, inner sleeve; 610, cutter head; 620, drive shaft; 630, input shaft; 700, suction channel; 800, front housing; 900, rear housing. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0034] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] like Figures 1-5 As shown in the figure, this application embodiment provides an eccentric cutting tool, which includes a base 100, a first eccentric support 200, an outer tube 300, a second eccentric support 400, a supporting inner tube 500, a cutting head assembly, and a suction channel 700. The base 100 has a first insertion interface, and one end of the first eccentric support 200 is fixedly installed into the first insertion interface. The first eccentric support 200 has a tubular structure, and one end of the outer tube 300 is fixedly installed into the first eccentric support 200, with the outer diameter of the outer tube 300 being equal to the inner diameter of the first eccentric support 200.

[0036] The second eccentric support 400 is fixedly installed on the end of the outer tube 300 away from the first eccentric support 200. The second eccentric support 400 has a gourd-shaped through hole 410. The gourd-shaped through hole 410 includes an offset support part 411 and a suction inlet 412. The support part 411 is a circular through hole, and the support part 411 and the suction inlet 412 partially overlap.

[0037] The inner support tube 500 passes through the outer tube 300, and one end is fixedly installed to the first eccentric support seat 200. The first eccentric support seat 200 has a mounting hole adapted to the inner support tube 500, and the outer diameter of the inner support tube 500 is smaller than the inner diameter of the first eccentric support seat 200. The other end of the inner support tube 500 is fixedly installed to the support part 411 of the gourd-shaped through hole 410, and the outer diameter of the inner support tube 500 is equal to the inner diameter of the support part 411.

[0038] The cutter head assembly includes a cutter head 610, a drive shaft 620, and an input shaft 630. The drive shaft 620 passes through the inner support tube 500 and is rotatably mounted within it. One end of the cutter head 610 is fixedly connected to the drive shaft 620, and the other end extends to the outside of the gourd-shaped through hole 410. It should be noted that the cutter head 610 can be a planer-type cutter head, a grinding head-type cutter head, etc., and this embodiment does not impose specific limitations. The input shaft 630 is rotatably mounted within the base 100, and the input shaft 630 and the cutter head 610 are coaxially connected via the drive shaft 620. The end of the input shaft 630 away from the drive shaft 620 passes through the base 100 and is used to connect to an external drive source.

[0039] Because the outer diameter of the inner support tube 500 is smaller than the inner diameter of the outer tube 300, there is a space between the outer tube 300 and the inner support tube 500. The suction channel 700 is located between the outer tube 300 and the inner support tube 500, and one end of it is connected to the suction inlet 412 of the gourd-shaped through hole 410. In addition, the inner support tube 500 is eccentrically positioned relative to the outer tube 300, that is, although the inner support tube 500 is located inside the outer tube 300, it is not coaxially positioned. This allows the suction channel 700 to pass through impurities with larger particle sizes. It should be noted that if the inner support tube 500 and the outer support tube 300 are concentrically arranged, the distance between the suction channels 700 between the inner support tube 500 and the outer support tube 300 is small; while if the inner support tube 500 is eccentrically placed relative to the outer support tube 300, the distance between the suction channels 700 between the inner support tube 500 and the outer support tube 300 is large, which can allow impurities of larger diameters to pass through and reduce the risk of blockage of the suction channels 700.

[0040] Through the above technical solution, the drive shaft 620 can rotate unidirectionally within the inner support tube 500, thereby driving the blade head 610 to rotate. The two ends of the inner support tube 500 are fixed by a first eccentric support 200 and a second eccentric support 400, respectively. The second eccentric support 400 has a gourd-shaped through hole 410, which serves as both support and a suction inlet 412. A suction channel 700 is formed between the outer tube 300 and the inner support tube 500, allowing waste liquid to be drawn from the suction inlet 412 of the second eccentric support 400 into the suction channel 700, and finally drawn through the base 100 into an external waste liquid collector. This design completely separates the blade head assembly from the suction channel 700, ensuring that the suction of waste liquid does not affect the rotation of the blade head assembly, allowing the blade head 610 to rotate at high speed and improving surgical efficiency. It also enhances the overall stability of the blade, thereby improving surgical safety.

[0041] In addition, the inner support tube 500 is eccentrically positioned relative to the outer tube 300, which allows the suction channel 700 to pass through impurities with larger particle sizes, reducing the risk of blockage in the suction channel 700.

[0042] In one possible embodiment, a portion of the inner wall of the first eccentric support 200 and a portion of the outer wall of the inner support tube 500 form a transition channel 210. The transition channel 210 communicates with the end of the suction channel 700 away from the gourd-shaped through hole 410, and the first eccentric support 200 has a suction outlet 220 communicating with the transition channel 210. This arrangement can seal one end of the suction channel 700, improving the tightness of the connection between the structures.

[0043] In one possible embodiment, the base 100 has a connecting channel 110, one end of which is connected to the suction outlet 220, and the other end is fitted with a suction tube 120. The free end of the suction tube 120 has a connector 121. With this configuration, when using the tool, the connector 121 of the suction tube 120 can be directly connected to an external waste liquid collector; when finished using the tool, the suction tube 120 can be directly disconnected from the waste liquid collector.

[0044] In one possible embodiment, a suction switch 130 for controlling the opening and closing of the connection channel 110 is installed on the base 100. The suction switch 130 can be an electric switch, a manual switch, etc. When the suction switch 130 is turned on, the device can automatically suction waste liquid; when the suction switch 130 is turned off, the device stops suctioning waste liquid.

[0045] In this embodiment, the suction switch 130 is a manual switch, including a valve core 131 and a rotating part 132. The valve core 131 has a valve hole and is installed in the connecting channel 110, capable of blocking the connecting channel 110. Specifically, when the valve hole of the valve core 131 is not aligned with the connecting channel 110, the connecting channel 110 is in a closed state; when the valve hole of the valve core 131 is aligned with the connecting channel 110, the connecting channel 110 is in an open state. One end of the rotating part 132 is connected to the valve core 131, and the other end is rotatably mounted on the outside of the base 100. The operator can adjust the state of the valve core 131 by moving the rotating part 132, thereby opening and closing the connecting channel 110.

[0046] In this embodiment, a sealing ring 140 is installed between the rotating part 132 and the base 100. By providing the sealing ring 140, the sealing performance between the rotating part 132 and the base 100 can be enhanced, reducing the risk of leakage.

[0047] In one possible embodiment, a baffle 420 is provided at the end of the second eccentric support 400 away from the outer tube 300, and the baffle 420 is located on one side of the blade head 610. By providing the baffle 420, on the one hand, waste liquid or debris will not splash when the blade head 610 acts on the patient's tissue; on the other hand, waste liquid can be better aspirated.

[0048] In one possible embodiment, to further enhance the stability of the tool head assembly, a bearing 230 is installed inside the first eccentric support 200. One end of the input shaft 630 passes through the bearing 230 and is rotatably mounted on the first eccentric support 200 via the bearing 230. By setting the bearing 230, the input shaft 630 can be more stable when rotating, thereby further improving the overall stability of the tool.

[0049] In one possible embodiment, an inner sleeve 510 is also installed between the supporting inner tube 500 and the drive shaft 620. The inner sleeve 510 is fixed inside the supporting inner tube 500, and the inner diameter of the inner sleeve 510 is equal to the inner diameter of the drive shaft 620. This arrangement makes the drive shaft 620 more stable during transmission, thereby further improving the overall stability of the tool.

[0050] In one possible embodiment, the eccentric cutter further includes a front housing 800 and a rear housing 900, which are respectively mounted at the front and rear ends of the base 100. The front housing 800 has a through hole through which the first eccentric support 200 passes; the rear housing 900 has a holder for mounting the suction tube 120, which can be used to fix the suction tube 120.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. An eccentric cutting tool, characterized in that, include: Base (100); A first eccentric support (200) is mounted to the base (100); An outer tube (300) is attached to the first eccentric support (200) at one end. The second eccentric support (400) is installed at the end of the outer tube (300) away from the first eccentric support (200), and the second eccentric support (400) has a gourd-shaped through hole (410). The inner support tube (500) passes through the outer tube (300), with one end installed to the first eccentric support seat (200) and the other end installed to the gourd-shaped through hole (410); A cutter head assembly, comprising a cutter head (610) and a drive shaft (620), wherein the drive shaft (620) passes through the inner support tube (500) and is rotatably mounted in the inner support tube (500), and the cutter head (610) is fixed to one end of the drive shaft (620); A suction channel (700) is provided between the outer tube (300) and the inner support tube (500), with one end connected to the gourd-shaped through hole (410). The inner support tube (500) is eccentrically placed relative to the outer tube (300).

2. The eccentric cutting tool according to claim 1, characterized in that, The cutter head assembly also includes an input shaft (630) rotatably mounted in the base (100), and the input shaft (630) and the cutter head (610) are coaxially connected via the drive shaft (620).

3. The eccentric cutting tool according to claim 2, characterized in that, A portion of the inner wall of the first eccentric support (200) and a portion of the outer wall of the inner support tube (500) form a transition channel (210). The transition channel (210) is connected to the end of the suction channel (700) away from the gourd-shaped through hole (410). A suction outlet (220) communicating with the transition channel (210) is provided on the first eccentric support (200).

4. The eccentric cutting tool according to claim 3, characterized in that, The base (100) has a connecting channel (110), one end of which is connected to the suction outlet (220), and the other end is equipped with a suction tube (120).

5. The eccentric cutting tool according to claim 4, characterized in that, A suction switch (130) for controlling the opening and closing of the connection channel (110) is installed on the base (100).

6. The eccentric cutting tool according to claim 5, characterized in that, The suction switch (130) includes a valve core (131) and a rotating part (132). The valve core (131) has a valve hole. The valve core (131) is installed in the connecting channel (110) and can block the connecting channel (110). One end of the rotating part (132) is connected to the valve core (131), and the other end is rotatably installed on the outside of the base (100).

7. The eccentric cutting tool according to claim 6, characterized in that, A sealing ring (140) is installed between the rotating part (132) and the base (100).

8. The eccentric cutting tool according to claim 1, characterized in that, The second eccentric support (400) is provided with a baffle (420) at the end away from the outer tube (300), and the baffle (420) is located on one side of the cutter head (610).

9. The eccentric cutting tool according to any one of claims 2-7, characterized in that, A bearing (230) is installed inside the first eccentric support (200). One end of the input shaft (630) passes through the bearing (230) and is rotatably mounted on the first eccentric support (200) through the bearing (230).

10. The eccentric cutting tool according to any one of claims 2-8, characterized in that, An inner sleeve (510) is also installed between the inner support tube (500) and the drive shaft (620).

Images