A view angle conversion adjusting structure and a laparoscope

Abstract

The application discloses a view angle transformation adjusting structure and a laparoscope, and belongs to the technical field of medical auxiliary equipment. The view angle transformation adjusting structure comprises a hard tube, a soft tube connected to the front end of the hard tube, and a pull rope arranged in the soft tube. A mounting sleeve is rotationally sleeved to the rear end of the hard tube. A one-way bearing is fixedly mounted on the mounting sleeve, and a rotating disc is fixedly mounted outside the one-way bearing. Three mounting holes are formed in the circumferential surface of the rotating disc, and a lock fastener is mounted in each mounting hole. The lock fastener comprises a lock sleeve and a lock shaft sleeved in the lock sleeve. Three winding devices are fixedly arranged on the circumferential surface of the rotating disc. One end of the pull rope away from the soft tube passes through a through groove, a second rope passing hole and a first rope passing hole and is fixed to the winding device. Three pull ropes correspond to three lock fasteners. The rotating disc can drive the pull rope to control the bending of the soft tube and the camera module, so that the view angle of the laparoscope is adjusted. The lock fastener and the rotating disc have self-locking and anti-reverse functions, so that the view angle of the adjusted laparoscope is stable, and the guiding operation is facilitated.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary equipment technology, specifically a viewing angle transformation and adjustment structure and a laparoscope. Background Technology

[0002] In recent years, with the rapid development of science and technology, medical technology has made significant progress, and minimally invasive surgery has been widely applied. Minimally invasive surgery, utilizing laparoscopic imaging, greatly reduces surgical trauma compared to traditional open surgery and is gradually being promoted. Laparoscopic techniques use a cold light source for illumination, inserting a laparoscope into the abdominal cavity. The images captured by the laparoscope are processed and displayed in real-time on a dedicated monitor to guide the surgery. Because the field of view of a laparoscope is generally limited, different viewing angles may be required.

[0003] Laparoscopic viewing angle adjustment is generally achieved using a flexible tube in conjunction with a pull wire. For example, a Chinese patent (CN104707231A) discloses an adjustable directional guide tube with a built-in light source for clinical nasotracheal intubation, which includes a flexible catheter. A miniature light is fixed to the front end of the catheter, and a power supply for powering the miniature light is fixed to the rear end of the catheter. Metal wires are fixed at three points: directly above, to the left, and to the right of the front end of the catheter. Three internal channels are opened on the inner side of the catheter wall, running along the direction of the catheter and corresponding to the fixing points of the metal wires. The metal wires pass through the corresponding internal channels and exit the catheter from the rear end. In use, the direction of the front section of the endotracheal tube is adjusted by pulling the corresponding two metal wires.

[0004] The shortcomings of the existing technology are: since two metal wires are required to work together with the elasticity of the catheter to achieve stable turning, the doctor needs to pull and control the two metal wires at the same time, which is more troublesome and difficult for a single person to complete; moreover, the patent does not disclose a limiting device, so the stability of the catheter bending angle cannot be guaranteed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a viewing angle transformation adjustment structure and a laparoscope.

[0006] This invention is achieved through the following technical solution: a viewing angle adjustment structure, comprising a rigid tube, with a flexible tube connected to the front end of the rigid tube, and three pull ropes for operating the front end of the flexible tube threaded through the flexible tube; a mounting sleeve is rotatably fitted onto the rear end of the rigid tube, and a fastening bolt is provided between the mounting sleeve and the rigid tube; a one-way bearing is fixedly installed on the mounting sleeve, and a turntable is fixedly installed outside the one-way bearing; three evenly distributed mounting holes are opened on the circumference of the turntable, and three evenly distributed through slots are also opened around the circumference of the turntable, the through slots corresponding to and intersecting the mounting holes; a locking device is installed in the mounting holes of the turntable; the locking device includes a locking sleeve and a locking shaft fitted in the locking sleeve; the locking sleeve is fixed to the turntable by a threaded connection. In the mounting hole, the lock sleeve shaft has a stepped through hole consisting of a coarse hole and a fine hole, with the coarse hole close to the turntable shaft; the lock shaft is a stepped shaft consisting of a coarse shaft and a fine shaft; the fine shaft is located in the fine hole, with its outer end extending out of the fine hole and connected to a pressure cap; the coarse shaft is located in the coarse hole, with a spring installed between its inner end and the bottom of the mounting hole of the turntable; a first rope hole is provided at the end of the fine shaft near the coarse shaft, and a second rope hole is provided at the position of the coarse hole near the fine hole, penetrating the lock sleeve; three evenly distributed retractors are fixed around the turntable; the end of the pull rope away from the hose passes through the through groove, the second rope hole, and the first rope hole and is fixed to the retractor.

[0007] Furthermore, the rigid tube has a limiting stop at its rear end, and the mounting sleeve abuts against the rear side of the limiting stop; a shaft retaining ring is also installed at the rear end of the rigid tube, and the shaft retaining ring abuts against the rear side of the mounting sleeve.

[0008] The mounting sleeve has a radial threaded hole, and the fastening bolt is installed in the radial threaded hole, with the inner end of the fastening bolt abutting against the rigid pipe.

[0009] The interface between the coarse and fine holes in the lock sleeve is an inclined plane at 45° radially to the lock sleeve, and the interface between the coarse and fine shafts in the lock shaft is also an inclined plane at 45° radially to the lock sleeve.

[0010] The pressure cap is connected to the thin shaft in the lock shaft by a thread, and the pressure cap is 1-2mm away from the lock sleeve; the outer end of the lock sleeve has two evenly distributed countersunk holes for cooperating with a screwdriver, and the outer end of the lock sleeve extends 1-2mm beyond the circumference of the turntable.

[0011] A laparoscopy system has a camera module fixed to the front end of a flexible tube. The camera module is connected to a cable that passes through the flexible tube and a rigid tube and is connected to a host computer.

[0012] Furthermore, the rigid tube is connected to a handle, and the handle is provided with anti-slip grooves.

[0013] Compared with the prior art, the beneficial effects of the present invention are: three pull ropes correspond to three locking devices. By pressing down the cap of one locking device, the other two pull ropes can be driven by rotating the turntable, controlling the bending of the hose and camera module, thereby realizing the adjustment of the laparoscope's viewing angle; the locking devices and turntable have self-locking and anti-reverse functions, which can ensure the stability of the laparoscope's viewing angle after adjustment and facilitate the guidance operation. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 yes Figure 1 View from AA direction;

[0016] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0017] Figure 4 yes Figure 3 The decomposition diagram in the image.

[0018] In the diagram: 1. Rigid pipe; 101. Limiting stop; 2. Flexible hose; 3. Pull rope; 4. Mounting sleeve; 5. Fastening bolt; 6. One-way bearing; 7. Turntable; 701. Mounting hole; 702. Through groove; 8. Locking device; 9. Locking sleeve; 901. Coarse hole; 902. Fine hole; 903. Second rope hole; 10. Locking shaft; 1001. Coarse shaft; 1002. Fine shaft; 1003. First rope hole; 11. Pressure cap; 12. Spring; 13. Retractor; 14. Shaft retaining ring; 15. Camera module; 16. Cable; 17. Handle. Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Combination Figure 1 and Figure 2As shown, a viewing angle adjustment structure includes a rigid tube 1, with a flexible tube 2 connected to its front end. Both the rigid tube 1 and the flexible tube 2 are hollow. Three pull ropes 3 for operating the front end of the flexible tube 2 are threaded through the flexible tube 2. The pull ropes 3 are evenly distributed at 120-degree intervals, and their front ends are fixed to the front ends of the flexible tube 2 and threaded through the outer walls of the rigid tube 1 and the flexible tube 2. The knots can be positioned on the upper, left, or right side of the flexible tube 2. A turntable 7 is rotatably mounted at the rear end of the rigid tube 1. Three evenly distributed locking devices 8 are installed on the turntable 7, each locking device 8 corresponding to a pull rope 3. Each locking device 8 on the turntable 7 is marked with a label to correspond to a pull rope 3, ensuring that after rotating the turntable 7 to a certain angle, the pull rope 3 corresponding to each locking device 8 can be clearly identified.

[0021] Combined Figure 3 and Figure 4 As shown, a mounting sleeve 4 is rotatably fitted at the rear end of the rigid tube 1, and a fastening bolt 5 is provided between the mounting sleeve 4 and the rigid tube 1. A limiting stop 101 is located at the rear of the rigid tube 1, and the mounting sleeve 4 abuts against the rear side of the limiting stop 101. A shaft retaining ring 14 is also installed at the rear of the rigid tube 1, abutting against the rear side of the mounting sleeve 4. The mounting sleeve 4 is axially limited between the limiting stop 101 and the shaft retaining ring 14. A radial threaded hole is provided on the mounting sleeve 4, and the fastening bolt 5 is installed in the radial threaded hole, with its inner end abutting against the rigid tube 1. A one-way bearing 6 is fixedly installed on the mounting sleeve 4, and a turntable 7 is fixedly installed outside the one-way bearing 6; the turntable 7 can only rotate clockwise around the mounting sleeve 4 under the action of the one-way bearing 6. During operation, the rotation of the mounting sleeve 4 is restricted by tightening the fastening bolt 5; after operation, the turntable 7 can rotate counterclockwise along with the mounting sleeve 4 by loosening the fastening bolt 5.

[0022] The turntable 7 has three evenly distributed mounting holes 701 on its circumference, and three evenly distributed through grooves 702 around its perimeter. The through grooves 702 correspond one-to-one with and intersect the mounting holes 701. The function of the through grooves 702 is to prevent interference with the pull rope 3. The locking device 8 is installed in the mounting holes 701 of the turntable 7.

[0023] The locking device 8 includes a locking sleeve 9 and a locking shaft 10 fitted within the locking sleeve 9. The locking sleeve 9 is fixed in the mounting hole 701 of the turntable 7 by a threaded connection. The shaft of the locking sleeve 9 has a stepped through hole consisting of a coarse hole 901 and a fine hole 902, with the coarse hole 901 close to the shaft center of the turntable 7. The locking shaft 10 is a stepped shaft consisting of a coarse shaft 1001 and a fine shaft 1002. The fine shaft 1002 is located in the fine hole 902, with its outer end extending out of the fine hole 902 and connected to a pressure cap 11. The coarse shaft 1001 is located in the coarse hole 901, and a spring 12 is provided between the inner end of the coarse shaft 1001 and the bottom of the mounting hole 701 of the turntable 7; the spring 12 is always in a compressed state, providing elastic force.

[0024] Preferably, the contact surfaces of the coarse hole 901 and the fine hole 902 in the lock sleeve 9 are inclined surfaces at a 45° radial angle to the lock sleeve 9, and the contact surfaces of the coarse shaft 1001 and the fine shaft 1002 in the lock shaft 10 are also inclined surfaces at a 45° radial angle to the lock sleeve 9. The pressure cap 11 is threaded to the fine shaft 1002 in the lock shaft 10, and the pressure cap 11 is 1-2 mm away from the lock sleeve 9. The outer end of the lock sleeve 9 extends 1-2 mm beyond the circumference of the turntable 7. Two evenly distributed countersunk holes for engaging with a screwdriver are provided at the outer end of the lock sleeve 9. The lock sleeve 9 can be installed and removed by inserting a forked screwdriver into the countersunk holes.

[0025] A first rope-passing hole 1003 is provided at the end of the thin shaft 1002 near the thick shaft 1001, penetrating the locking shaft 10. A second rope-passing hole 903 is provided at the position of the thick hole 901 near the thin hole 902, penetrating the locking sleeve 9. Similarly, the first rope-passing hole 1003 and the second rope-passing hole 903 are also inclined. Three evenly distributed retractors 13 are fixed around the turntable 7. The rear end of the pull rope 3 passes through the through groove 702, the second rope-passing hole 903, and the first rope-passing hole 1003 and is fixed on the retractor 13. Under the elastic force of the spring 12, the locking shaft 10 and the locking sleeve 9 press the pull rope 3 together; when the pressure cap 11 is pressed inward, the pull rope 3 is unlocked.

[0026] Preferably, the retractor 13 provides an automatic winding force. Inside the retractor is a return spring and a reel. The return spring provides rotational force to the reel, and the pull rope 3 is wound around the reel, allowing the pull rope 3 to be retracted. This ensures that the pull rope 3 is basically taut, improving operational accuracy. Example

[0027] A laparoscopy, based on the above embodiment 1, has a camera module 15 fixed to the front end of a flexible tube 2. The camera module 15 is connected to a cable 16, which passes through the flexible tube 2 and the rigid tube 1 and is connected to a host computer. The rigid tube 1 is connected to a handle 17, which is provided with anti-slip grooves.

[0028] Work process:

[0029] Hold the handle 17 of the laparoscope, press your index finger on the cap 11 of the locking device 8 on the top of the turntable 7, and place your thumb on the bottom of the turntable 7. Rotate the turntable 7 clockwise. At this time, the upper pull rope 3 is loosened, and the left and right pull ropes 3 are locked by the locking device 8. Rotating the turntable 7 can pull the left and right pull ropes 3 and adjust the bending angle of the hose 2.

[0030] In this embodiment, three locking devices are set for the three pull ropes. Pressing down the cap of one locking device and rotating the turntable can drive the other two pull ropes, controlling the bending of the hose and camera module to adjust the viewing angle of the laparoscope. The locking devices and the turntable have self-locking and anti-reverse functions, which can ensure the stability of the viewing angle of the laparoscope after adjustment and facilitate the guidance of operation.

[0031] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A view direction angle conversion adjusting structure, comprising a hard pipe (1), a soft pipe (2) connected to the front end of the hard pipe (1), and three pull ropes (3) arranged in the soft pipe (2) and used for operating the front end of the soft pipe (2); characterized in that: a mounting sleeve (4) is rotatably sleeved to the rear end of the hard pipe (1), fastening bolts (5) are arranged between the mounting sleeve (4) and the hard pipe (1), a one-way bearing (6) is fixedly installed on the mounting sleeve (4), and a rotating disc (7) is fixedly installed outside the one-way bearing (6); three mounting holes (701) are arranged on the circumferential surface of the rotating disc (7) at equal intervals, three through grooves (702) are further arranged on the circumferential surface of the rotating disc (7) at equal intervals, the through grooves (702) correspond to the mounting holes (701) one by one and intersect with the mounting holes (701), and a lock (8) is installed in the mounting hole (701) of the rotating disc (7).

2. The lock (8) comprises a lock sleeve (9) and a lock shaft (10) sleeved in the lock sleeve (9).

3. The lock sleeve (9) is fixed in the mounting hole (701) of the rotating disc (7) through threaded connection, the shaft center of the lock sleeve (9) has a stepped through hole composed of a thick hole (901) and a thin hole (902), the thick hole (901) is close to the shaft center of the rotating disc (7), the lock shaft (10) is a stepped shaft composed of a thick shaft (1001) and a thin shaft (1002), the thin shaft (1002) is located in the thin hole (902), the outer end of the thin shaft (1002) extends out of the thin hole (902) and is connected with a pressing cap (11), the thick shaft (1001) is located in the thick hole (901), and a spring (12) is arranged between the inner end of the thick shaft (1001) and the bottom of the mounting hole (701) of the rotating disc (7).

4. An end of the thin shaft (1002) close to the thick shaft (1001) is provided with a first rope passing hole (1003) penetrating the lock shaft (10), and a second rope passing hole (903) penetrating the lock sleeve (9) is arranged at a position of the thick hole (901) close to the thin hole (902).

5. Three winding devices (13) are fixedly arranged on the circumferential surface of the rotating disc (7) at equal intervals, the end of the pull rope (3) away from the soft pipe (2) penetrates the through groove (702), the second rope passing hole (903) and the first rope passing hole (1003) and is fixed on the winding device (13).

6. The joint surface between the thick hole (901) and the thin hole (902) in the lock sleeve (9) is an inclined surface inclined to the radial direction of the lock sleeve (9) by 45°, and the joint surface between the thick shaft (1001) and the thin shaft (1002) in the lock shaft (10) is also an inclined surface inclined to the radial direction of the lock sleeve (9) by 45°.

7. The rear part of the hard pipe (1) is provided with a limiting stop (101), the mounting sleeve (4) abuts against the rear side of the limiting stop (101), an axle stop ring (14) is further arranged on the rear part of the hard pipe (1), and the axle stop ring (14) abuts against the rear side of the mounting sleeve (4).

8. A radial threaded hole is arranged on the mounting sleeve (4), the fastening bolt (5) is arranged in the radial threaded hole, and the inner end of the fastening bolt (5) abuts against the hard pipe (1). ​ 2. The view angle conversion structure according to claim 1, characterized in that: ​ 3. The view angle conversion structure according to claim 1, wherein: ​ 4. The view angle conversion structure according to claim 1, wherein: The cap (11) is connected with the thin shaft (1002) in the lock shaft (10) through thread connection, the cap (11) is 1-2mm away from the lock sleeve (9); two evenly distributed counterbores for cooperating with a screwdriver are arranged on the outer end of the lock sleeve (9), and the outer end of the lock sleeve (9) is 1-2mm longer than the peripheral surface of the rotating disc (7).

5. A laparoscope characterized by: The front end of the hose (2) is fixed with a camera module (15), the camera module (15) is connected with a cable (16), the cable (16) passes through the hose (2) and the hard pipe (1) and is connected with a host computer.

6. A laparoscope according to claim 5, wherein: The hard pipe (1) is connected with a handle (17), and an anti-skid groove is arranged on the handle (17).

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