Planing device for endoscopic surgery

Abstract

The invention relates to an endoscopic surgery planing device, and relates to the technical field of medical instruments, the endoscopic surgery planing device comprises a device body, a suction channel is arranged in the device body, a motor and a driving gear driven by the motor to rotate are arranged in the device body, a gear ring, an intermediate gear and an inner gear are rotatably arranged in the suction channel, and gear teeth are arranged on the inner wall and the outer wall of the gear ring; outer wall gear teeth of the gear ring are meshed with the driving gear; the intermediate gear is simultaneously meshed with the inner gear and inner wall gear teeth of the gear ring; a center shaft is fixed to the center of the inner gear, an inner cutter is fixed to the front end of the center shaft, and an outer cutter is fixed to the front end of the connecting rod. According to the planing device, the inner cutter and the outer cutter are arranged to form double cutters, the rotating directions of the inner cutter and the outer cutter are opposite through the reversing effect of the intermediate gear, and the planing effect is improved; the first pressing plate or the second pressing plate is pressed down to drive the corresponding inner cutter or the corresponding outer cutter to move axially, so that the planing effect is improved to the maximum extent, human tissue or calculus is not prone to being clamped at an inlet of the suction channel, and use is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an endoscopic surgical shaver. Background Art

[0002] In the prostate hyperplasia surgery, after the gland is electrocuted or laser enucleated, the cut tissue is crushed and sucked out by an endoscopic surgical planer, which can also be used for stone surgery. The planer in the prior art generally adopts a structure in which the blade head is mounted on a power handle, and the power handle contains a motor and other structures for providing power to the blade head.

[0003] The existing invention patent application with publication number CN111685854A discloses an underwater planing system and a method of use that can avoid bladder damage. The system includes a planing main body system and a liquid pressure sensor system; the planing main body system includes a planing cutter head and a control device for controlling the operation of the planing cutter head, and the tool part includes an operating handle and a planing cutter head. The planing cutter head is inserted into the working channel through the surgical instrument interface on the handle of the endoscope system until the planing cutter head edge of the planing cutter head extends out of the front port of the working channel and can rotate freely. The planing cutter head is a rotating cutter head, which is installed on the operating handle. The host is connected to the planing cutter head through the operating handle to provide the planing cutter head with working power and negative pressure for absorbing the drainage fluid in the cavity. The planing cutter head is a hollow structure, and a pipeline is provided in the operating handle. The planing cutter head is connected to the drainage collection bottle through the pipeline, and is used to drain the crushed tissue into the drainage collection bottle.

[0004] With respect to the above-mentioned related technologies, the inventor believes that the existing planer has only one cutter, which is insufficient in crushing tissues or stones and cannot be effectively crushed, and needs to be improved. Summary of the invention

[0005] The present application provides an endoscopic surgical shaver, which forms a double knife by arranging an inner knife and an outer knife, and the two knives rotate in opposite directions, thereby improving the ability to crush tissues and stones.

[0006] The present application provides an endoscopic surgical shaver, which adopts the following technical solution:

[0007] An endoscopic surgical shaver comprises a device body, a suction channel is arranged in the device body, an endoscope head is arranged at the front end of the device body, a motor and a driving gear driven to rotate by the motor are arranged in the device body, a gear ring, an intermediate gear and an internal gear are rotatably arranged in the suction channel, gear teeth are arranged on the inner and outer walls of the gear ring, the outer wall gear teeth of the gear ring are meshed with the driving gear, and the intermediate gear is meshed with the inner wall gear teeth of the internal gear and the gear ring at the same time; a central shaft is fixed at the center of the internal gear, an inner knife is fixed at the front end of the central shaft, a plurality of connecting rods are fixed to the gear ring, and an outer knife is fixed to the front end of the connecting rod.

[0008] By adopting the above technical solution, when the motor drives the active gear to rotate, the gear ring is driven to rotate through the meshing action of the gears, and then the inner gear is driven to rotate through the transmission action of the intermediate gear. The planer is provided with an inner knife and an outer knife to form a double knife. Through the reversing action of the intermediate gear, the inner knife and the outer knife rotate in opposite directions, thereby improving the planing effect.

[0009] Optionally, a graphite disk is fixed to the central shaft, a polytetrafluoroethylene ring is fixed to the gear ring, the outer ring wall of the ring is in sliding and sealing contact with the inner wall of the suction channel, and the inner ring wall of the ring is in sliding and sealing contact with the outer wall of the disk.

[0010] By adopting the above technical solution, graphite and polytetrafluoroethylene are both materials with low friction coefficient and good wear resistance. The combination of the disc and the ring is used to form a seal to prevent water from leaking into the side where the gears and the motor are located. At the same time, the disc and the ring support each other, so that the central axis of the central shaft and the central axis of the gear ring are stably maintained in the center position of the suction channel.

[0011] Optionally, a suction port is provided on the outer wall of the device body, the suction port is communicated with the suction channel, and the communication position of the suction port is located between the disc and the front end of the device body.

[0012] By adopting the above technical solution, after installing the joint on the suction port, the pipeline can be plugged in and the liquid in the suction channel can be sucked by the water pump.

[0013] Optionally, a wheel axle is fixed in the body of the device, the intermediate gear is rotatably connected to the wheel axle, and the thickness of the intermediate gear is greater than the thickness of the internal gear and the ring gear.

[0014] By adopting the above technical solution, the position of the intermediate gear is prevented from moving by the wheel shaft; the thickness of the ring gear is greater than the thickness of the driving gear, so that the ring gear maintains a meshing state with the driving gear when axially sliding.

[0015] Optionally, the end of the center shaft away from the inner knife is rotatably connected to a center rod, the center rod is slidably connected to the device body, and a pressure plate is fixed to the end of the center rod outside the device body.

[0016] By adopting the above technical solution, after pressing plate 1, the pressing plate 1 acts on the central axis through the central rod, so that the inner knife moves a small distance toward the outside of the suction channel, thereby improving the planing effect on objects that are difficult to break.

[0017] Optionally, a rotating sleeve is fixed to the end of the gear ring facing away from the outer knife, the rotating sleeve is rotatably connected to a pull ring, a plurality of pull rods are fixed to the pull ring, the pull rods are slidably connected to the device body, all the pull rods pass through the device body and a pressure plate 2 is commonly fixed to the ends.

[0018] By adopting the above technical solution, after pressing the second pressing plate, the pull rod, pull ring and rotating sleeve act on the gear ring, so that the outer knife moves a small distance outside the suction channel, thereby improving the planing effect on objects that are difficult to break.

[0019] Optionally, the center rod passes through the second pressing plate and is slidably connected to the second pressing plate.

[0020] By adopting the above technical solution, the center rod and the second pressure plate are slidably guided to each other, thereby improving the sliding stability.

[0021] Optionally, a tension spring 1 is disposed on the outer sleeve of the center rod, and two ends of the tension spring 1 are respectively fixed to the inner wall of the device body and the center rod.

[0022] By adopting the above technical solution, a restoring force is provided for the movement of the central rod through the tension spring.

[0023] Optionally, a second tension spring is commonly sleeved outside all the pull rods, and two ends of the second tension spring are respectively fixed to the inner wall of the device body and the pull ring.

[0024] By adopting the above technical solution, the second tension spring provides a restoring force for the movement of the pull rod.

[0025] Optionally, the outer diameter of the pressing plate one is smaller than that of the pressing plate two.

[0026] By adopting the above technical solution and customizing the sizes of the first pressing plate and the second pressing plate, the user can conveniently press the first pressing plate or the second pressing plate with the thumb, or press both plates at the same time, which is easy to operate.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. This planer is equipped with an inner knife and an outer knife to form a double knife. Through the reversing effect of the intermediate gear, the inner knife and the outer knife rotate in opposite directions, thereby improving the planing effect;

[0029] 2. By pressing the first or second pressing plate, the corresponding inner or outer knife is driven to move axially to maximize the planing effect. Human tissue or stones are not easily stuck at the entrance of the suction channel, making it more convenient to use.

[0030] 3. The graphite disc and the polytetrafluoroethylene ring ensure the sealing, good wear resistance and low friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a stereoscopic view of an endoscopic surgical planer of an embodiment;

[0032] Figure 2 is a partial cross-sectional view of an embodiment;

[0033] Figure 3 yes Figure 2 A partial enlarged view of

[0034] Figure 4 It is a partial structural stereogram of an embodiment.

[0035] Explanation of the reference numerals in the accompanying drawings: 1. Device body; 11. Suction channel; 12. Endoscope lens; 2. Motor; 21. Driving gear; 3. Ring gear; 13. Intermediate gear; 4. Internal gear; 41. Center shaft; 42. Inner knife; 31. Connecting rod; 32. Outer knife; 14. Axle; 43. Disc; 33. Ring; 15. Suction port; 44. Center rod; 45. Pressing plate one; 34. Rotating sleeve; 35. Pull ring; 36. Pull rod; 37. Pressing plate two; 46. Tension spring one; 38. Tension spring two. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings.

[0037] Reference Figure 1 This embodiment discloses an endoscopic surgical shaver, including a device body 1, a suction channel 11 is arranged inside the device body 1, and an endoscope lens 12 is arranged at the front end of the device body 1.

[0038] Reference Figure 2 , Figure 3 and Figure 4 A motor 2 and a driving gear 21 driven to rotate by the motor 2 are arranged in the device body 1, a ring gear 3, an intermediate gear 13 and an internal gear 4 are rotatably arranged in the suction channel 11, gear teeth are arranged on the inner and outer walls of the ring gear 3, the outer wall gear teeth of the ring gear 3 are meshed with the driving gear 21, and the intermediate gear 13 is meshed with the inner wall gear teeth of the internal gear 4 and the ring gear 3 at the same time; a central shaft 41 is fixed at the center of the internal gear 4, an inner knife 42 is fixed at the front end of the central shaft 41, a plurality of connecting rods 31 are fixed to the ring gear 3, and an outer knife 32 is fixed to the front end of the connecting rod 31.

[0039] The side walls of the inner blade 42 and the outer blade 32 are provided with teeth to improve the planing effect. The adjacent connecting rods 31 are connected by arc-shaped rods to improve the rigidity. A wheel shaft 14 is fixed in the device body 1, and the intermediate gear 13 is rotatably connected to the wheel shaft 14, so the axis position of the intermediate gear 13 is fixed. When the motor 2 drives the driving gear 21 to rotate, the gear ring 3 is driven to rotate through the gear meshing action, and then the inner gear 4 is driven to rotate through the transmission action of the intermediate gear 13, then the rotation directions of the gear ring 3 and the inner gear 4 are opposite, so the rotation directions of the inner blade 42 and the outer blade 32 are opposite, which improves the planing effect.

[0040] The central shaft 41 is fixed with a disk 43 made of graphite, and the gear ring 3 is fixed with a ring 33 made of polytetrafluoroethylene. The outer ring wall of the ring 33 is in sliding and sealing contact with the inner wall of the suction channel 11, and the inner ring wall of the ring 33 is in sliding and sealing contact with the outer wall of the disk 43. Both graphite and polytetrafluoroethylene are materials with low friction coefficient and good wear resistance. The combination of the disk 43 and the ring 33 is used to form a seal to prevent water from leaking into the side where the gears and the motor 2 are located. At the same time, the disk 43 and the ring 33 support each other, so that the central axis of the central shaft 41 and the gear ring 3 is stably maintained at the center position of the suction channel 11.

[0041] Reference Figure 2 The outer wall of the device body 1 is provided with a suction port 15, which is connected to the suction channel 11, and the connection position of the suction port 15 is located between the disc 43 and the front end of the device body 1. After the joint is installed on the suction port 15, the pipeline can be inserted and the liquid in the suction channel 11 can be sucked by the water pump.

[0042] In this embodiment, the axial positions of the inner blade 42 and the outer blade 32 can slide slightly independently, and the specific structure is as follows:

[0043] Reference Figure 2 , Figure 3 and Figure 4 The thickness of the ring gear 3 is greater than the thickness of the driving gear 21, so that when the ring gear 3 slides axially, it maintains a meshing state with the driving gear 21; the thickness of the intermediate gear 13 is greater than the thickness of the internal gear 4 and the ring gear 3, so that when the internal gear 4 and the ring gear 3 slide axially, they maintain a meshing state with the intermediate gear 13.

[0044] The end of the central shaft 41 away from the inner blade 42 is rotatably connected to a central rod 44, which is slidably connected to the device body 1, and a pressure plate 1 45 is fixed to the end of the central rod 44 outside the device body 1. A rotating sleeve 34 is fixed to the end of the gear ring 3 away from the outer blade 32, and a pull ring 35 is rotatably connected to the rotating sleeve 34, and a plurality of pull rods 36 are fixed to the pull ring 35, and the pull rods 36 are slidably connected to the device body 1, and all the pull rods 36 pass through the outside of the device body 1 and a pressure plate 2 37 is fixed to the ends.

[0045] The center rod 44 penetrates the second pressure plate 37 and is slidably connected with the second pressure plate 37. The center rod 44 and the second pressure plate 37 are mutually slidably guided to improve the sliding stability. A tension spring 1 46 is provided on the outer sleeve of the center rod 44, and the two ends of the tension spring 1 46 are respectively fixed to the inner wall of the device body 1 and the center rod 44. A tension spring 2 38 is provided on the outer sleeve of all the pull rods 36, and the two ends of the tension spring 2 38 are respectively fixed to the inner wall of the device body 1 and the pull ring 35. The tension spring 1 46 provides a restoring force for the movement of the center rod 44, and the tension spring 2 38 provides a restoring force for the movement of the pull rod 36. The outer diameter of the pressure plate 1 45 is smaller than that of the pressure plate 2 37, and the user can easily press the pressure plate 1 45 or the pressure plate 2 37 with the thumb, or press both plates at the same time. After pressing the pressure plate 1 45, the pressure plate 1 45 acts on the central axis 41 through the central rod 44, so that the inner knife 42 moves a small distance toward the outside of the suction channel 11, thereby improving the planing effect on objects that are difficult to break. Similarly, after pressing the pressure plate 2 37, the pull rod 36, the pull ring 35, and the rotating sleeve 34 act on the gear ring 3, so that the outer knife 32 moves a small distance toward the outside of the suction channel 11, thereby improving the planing effect on objects that are difficult to break. The inner knife 42 and the outer knife 32 can move separately or together to achieve the best planing effect.

[0046] The implementation principle of an endoscopic surgical shaver in an embodiment of the present application is as follows: after installing a connector on the suction port 15, plug in the pipeline, insert the front end of the device body 1 into the surgical site, start the motor 2 to drive the inner knife 42 and the outer knife 32 to rotate, and then shaver and crush human tissue or stones, and use a water pump connected to the pipeline to suck the liquid and debris in the suction channel 11.

[0047] The planer is provided with an inner knife 42 and an outer knife 32 to form a double knife. Through the reversing effect of the intermediate gear 13, the inner knife 42 and the outer knife 32 rotate in opposite directions, thereby improving the planing effect. And by pressing the pressing plate 1 45 or the pressing plate 2 37, the corresponding inner knife 42 or the outer knife 32 is driven to move axially to maximize the planing effect, and human tissue or stones are not easily stuck at the entrance of the suction channel 11, which is more convenient to use.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An endoscopic surgical shaver, comprising a device body (1), wherein a suction channel (11) is provided inside the device body (1), and an endoscope lens (12) is provided at the front end of the device body (1), characterized in that: The device body (1) is provided with a motor (2) and a driving gear (21) driven to rotate by the motor (2); a gear ring (3), an intermediate gear (13) and an internal gear (4) are rotatably provided in the suction channel (11); the inner and outer walls of the gear ring (3) are provided with gear teeth; the outer wall gear teeth of the gear ring (3) mesh with the driving gear (21); the intermediate gear (13) meshes with the inner wall gear teeth of the internal gear (4) and the gear ring (3); a central shaft (41) is fixed at the center of the internal gear (4); an inner knife (42) is fixed at the front end of the central shaft (41); a plurality of connecting rods (31) are fixed to the gear ring (3); and an outer knife (32) is fixed at the front end of the connecting rod (31).

2. An endoscopic surgical shaver according to claim 1, characterized in that: The central shaft (41) is fixed with a disk (43) made of graphite, the gear ring (3) is fixed with a ring (33) made of polytetrafluoroethylene, the outer ring wall of the ring (33) is in sliding and sealing contact with the inner wall of the suction channel (11), and the inner ring wall of the ring (33) is in sliding and sealing contact with the outer wall of the disk (43).

3. An endoscopic surgical shaver according to claim 2, characterized in that: The outer wall of the device body (1) is provided with a suction port (15), the suction port (15) is connected to the suction channel (11), and the connection position of the suction port (15) is located between the disc (43) and the front end of the device body (1).

4. An endoscopic surgical shaver according to claim 1, characterized in that: A wheel axle (14) is fixed inside the device body (1), the intermediate gear (13) is rotatably connected to the wheel axle (14), and the thickness of the intermediate gear (13) is greater than the thickness of the internal gear (4) and the gear ring (3).

5. An endoscopic surgical shaver according to claim 4, characterized in that: The end of the central shaft (41) away from the inner knife (42) is rotatably connected to a central rod (44), and the central rod (44) is slidably connected to the device body (1). A pressure plate (45) is fixed to the end of the central rod (44) located outside the device body (1).

6. An endoscopic surgical shaver according to claim 5, characterized in that: A rotating sleeve (34) is fixed to the end of the gear ring (3) facing away from the outer knife (32), and the rotating sleeve (34) is rotatably connected to a pull ring (35). The pull ring (35) is fixed with a plurality of pull rods (36), and the pull rods (36) are slidably connected to the device body (1). All the pull rods (36) extend out of the device body (1) and a pressure plate 2 (37) is commonly fixed to the ends.

7. An endoscopic surgical shaver according to claim 6, characterized in that: The center rod (44) passes through the second pressing plate (37) and is slidably connected to the second pressing plate (37).

8. An endoscopic surgical shaver according to claim 5, characterized in that: The central rod (44) is provided with a tension spring (46) on its outer sleeve, and the two ends of the tension spring (46) are respectively fixed to the inner wall of the device body (1) and the central rod (44).

9. An endoscopic surgical shaver according to claim 6, characterized in that: A second tension spring (38) is commonly sleeved outside all the pull rods (36), and the two ends of the second tension spring (38) are respectively fixed to the inner wall of the device body (1) and the pull ring (35).

10. An endoscopic surgical shaver according to claim 6, characterized in that: The outer diameter of the pressing plate 1 (45) is smaller than that of the pressing plate 2 (37).

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