Endoscopic surgical planer

Abstract

The present application relates to an endoscopic surgical planer, which relates to the field of medical device technology. It includes a device body, a suction channel, a motor, and a driving gear driven by the motor. A ring gear, an intermediate gear, and an internal gear are provided for rotation in the suction channel. The inner and outer walls of the ring gear are provided with gear teeth. The outer wall gear teeth of the ring gear mesh with the driving gear, and the intermediate gear meshes with the inner wall gear teeth of the internal gear and the ring gear at the same time. A central shaft is fixed to the center of the internal gear, an inner cutter is fixed to the front end of the central shaft, and an outer cutter is fixed to the front end of a connecting rod. The planer is provided with an inner cutter and an outer cutter to form a double cutter. Through the reversing effect of the intermediate gear, the inner cutter and the outer cutter rotate in opposite directions, thereby improving the planing effect. By pressing the first or second pressure plate, the corresponding inner cutter or outer cutter is driven to produce axial movement 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.

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] During prostate enlargement surgery, after the gland is removed by electrocautery or laser enucleation, the excised tissue is pulverized and aspirated using an endoscopic surgical planer. Endoscopic planers can also be used for stone surgery. Existing planers typically feature a blade mounted on a power handle, which contains a motor and other components to power the blade.

[0003] An existing invention patent application with publication number CN111685854A discloses an underwater planing system and method for use that can prevent bladder damage. The system includes a planing main body system and a liquid pressure sensor system. The planing main body system includes a planing head and a control device for controlling the operation of the planing head. The tool portion includes an operating handle and a planing head. The planing head is inserted into the working channel through the surgical instrument interface on the handle of the endoscope system until the planing blade of the planing head extends out of the front port of the working channel and can rotate freely. The planing head is a rotating head mounted on the operating handle. The main body is connected to the planing head through the operating handle, providing the planing head with operating power and negative pressure for absorbing drainage fluid from the cavity. The planing head is a hollow structure. The operating handle is provided with a pipe, which connects the planing head to the drainage collection bottle through this pipe and is used to drain the pulverized 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 may fail to crush effectively, 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 planer, which adopts the following technical solution:

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

[0008] By adopting the above technical solution, when the motor drives the driving gear to rotate, the gear meshing action drives the ring gear to rotate, and then the transmission action of the intermediate gear drives the internal gear to rotate. This planer is equipped with an inner and outer blades to form a double blade. The inner and outer blades rotate in opposite directions due to the reversing action of the intermediate gear, thereby improving the planing effect.

[0009] Optionally, a graphite disc 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 disc.

[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 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 it slides axially.

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

[0016] By adopting the above technical solution, after pressing the pressure plate 1, the pressure 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, and the rotating sleeve is rotatably connected to a pull ring, and the pull ring is fixed with several pull rods, and the pull rods are slidably connected to the device body. All pull rods pass through the device body and a pressure plate 2 is 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 slide and guide each other, thereby improving the sliding stability.

[0021] Optionally, a tension spring 1 is provided 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, the tension spring 1 provides a restoring force for the movement of the central rod.

[0023] Optionally, a second tension spring is commonly sleeved on the outside of 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 1 is smaller than that of the pressing plate 2.

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

[0027] In summary, this 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, which improves 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 polytetrafluoroethylene ring ensure sealing, good wear resistance and low friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a perspective view of an endoscopic surgical planer according to 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 accompanying reference numerals: 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 1; 34. Rotating sleeve; 35. Pull ring; 36. Pull rod; 37. Pressing plate 2; 46. Tension spring 1; 38. Tension spring 2. DETAILED DESCRIPTION

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

[0037] Reference Figure 1 This embodiment discloses an endoscopic surgical planer, which includes a device body 1 , a suction channel 11 is provided in the device body 1 , and an endoscope head 12 is provided 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 by the motor 2 are provided in the device body 1. A ring gear 3, an intermediate gear 13, and an internal gear 4 are provided for rotation in the suction channel 11. The inner and outer walls of the ring gear 3 are provided with gear teeth. The outer wall gear teeth of the ring gear 3 are engaged with the driving gear 21, and the intermediate gear 13 is engaged 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 to the center of the internal gear 4, and an inner knife 42 is fixed to 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 sidewalls of the inner and outer blades 42 and 32 are both equipped with teeth to enhance the planing effect. Adjacent connecting rods 31 are connected by arc-shaped rods to enhance rigidity. A wheel axle 14 is fixed within the device body 1, and the intermediate gear 13 is rotatably connected to the wheel axle 14, thereby maintaining the axial position of the intermediate gear 13. When the motor 2 drives the driving gear 21 to rotate, the gear meshing action drives the ring gear 3 to rotate, and then the transmission action of the intermediate gear 13 drives the inner gear 4 to rotate. As a result, the ring gear 3 and the inner gear 4 rotate in opposite directions, and therefore the inner and outer blades 42 and 32 rotate in opposite directions, enhancing the planing effect.

[0040] A graphite disk 43 is fixed to the central shaft 41, and a polytetrafluoroethylene ring 33 is fixed to the ring gear 3. The outer wall of the ring 33 is in sliding, sealing contact with the inner wall of the suction channel 11, while the inner wall of the ring 33 is in sliding, sealing contact with the outer wall of the disk 43. Graphite and polytetrafluoroethylene are both materials with low friction coefficients and good wear resistance. The combination of the disk 43 and the ring 33 forms a seal, preventing water from leaking into the gears and motor 2. The disk 43 and the ring 33 also support each other, keeping the central axis of the central shaft 41 and the ring gear 3 stable at the center 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. The connection position of the suction port 15 is located between the disc 43 and the front end of the device body 1. After installing a connector on the suction port 15, a 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 independently slide slightly. 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 facing away from the inner blade 42 is rotatably connected to a central rod 44, which is slidably connected to the device body 1. A first pressure plate 45 is fixed to the end of the central rod 44 located outside the device body 1. A rotating sleeve 34 is fixed to the end of the ring gear 3 facing away from the outer blade 32. A pull ring 35 is rotatably connected to the rotating sleeve 34, which is fixed to a plurality of pull rods 36. The pull rods 36 are slidably connected to the device body 1. All pull rods 36 extend outside the device body 1 and are commonly fixed to a second pressure plate 37 at their ends.

[0045] The center rod 44 passes through the second pressure plate 37 and is slidably connected to the second pressure plate 37. The center rod 44 and the second pressure plate 37 slide and guide each other, improving sliding stability. A tension spring 1 46 is provided on the outer surface of the center rod 44. 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. All the pull rods 36 are commonly provided with a tension spring 2 38 on the outer surface. 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 rods 36. The outer diameter of the first pressure plate 45 is smaller than that of the second pressure plate 37. The user can conveniently press the first pressure plate 45 or the second pressure plate 37 with his 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 shaft 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 crush. 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 crush. 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 planer in an embodiment of the present application is: 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, and start the motor 2 to drive the inner knife 42 and the outer knife 32 to rotate, so as to plane and crush human tissue or stones, and suck the liquid and debris in the suction channel 11 through a water pump connected to the outside of the pipeline.

[0047] This planer utilizes a dual blade arrangement consisting of an inner blade 42 and an outer blade 32. The reversing action of the intermediate gear 13 causes the inner blade 42 and the outer blade 32 to rotate in opposite directions, enhancing the planing effect. Furthermore, by pressing the first pressure plate 45 or the second pressure plate 37, the corresponding inner blade 42 or outer blade 32 is driven to move axially, maximizing the planing effect. This prevents tissue or stones from becoming lodged in the entrance of the suction channel 11, making it more convenient to use.

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

Claims

1. An endoscopic surgical planer, comprising a device body (1), wherein the device body (1) is provided with a suction channel (11), and an endoscope head (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 ring gear (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 ring gear (3) are provided with gear teeth; the outer wall gear teeth of the ring gear (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 ring gear (3); a central shaft (41) is fixed at the center of the internal gear (4); an inner blade (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 blade (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 graphite disk (43), the gear ring (3) is fixed with a polytetrafluoroethylene ring (33), 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. The 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 communicated with the suction channel (11), and the communication position of the suction port (15) is located between the disc (43) and the front end of the device body (1).

4. The endoscopic surgical shaver according to claim 1, characterized in that: A wheel axle (14) is fixed in 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 ring gear (3).

5. The 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), the central rod (44) is slidably connected to the device body (1), and the end of the central rod (44) located outside the device body (1) is fixed with a pressure plate (45).

6. The 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) pass through the outside of the device body (1) and a pressure plate 2 (37) is fixed to the ends.

7. The 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. The endoscopic surgical shaver according to claim 5, characterized in that: The outer sleeve of the central rod (44) is provided with a tension spring (46), 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. The 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. The endoscopic surgical shaver according to claim 6, characterized in that: The outer diameter of the first pressing plate (45) is smaller than that of the second pressing plate (37).

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