CN116784775B - Angle-adjustable endoscope - Google Patents

Abstract

The invention discloses an angle-adjustable endoscope, which includes an endoscope housing (1). One end of the endoscope housing (1) is connected to a mirror tube (2). The end of the body (1) close to the mirror tube (2) is provided with a wire drawing drive assembly, and the end of the endoscope housing (1) connected to the mirror tube (2) is rotatably installed with an adjustment knob (3). , the adjustment knob (3) is connected to the wire drawing drive assembly, the end of the mirror tube (2) is connected to an angle adjustment section (4), the angle adjustment section (4) is connected to the wire drawing (5) The wire drawing drive assembly connections described above. The invention is easy to operate, does not cause sticking problems when adjusting the angle, and is not easily damaged.

Description

Angle-adjustable endoscope

Technical field

The invention relates to a medical endoscope, in particular to an angle-adjustable endoscope.

Background technique

With the development and progress of medical technology, endoscopy technology is becoming more and more mature. Endoscopes are mostly used in minimally invasive surgeries. They use natural holes in the human body or artificially created small holes to insert the lens of the endoscope into the patient's body and use a camera to take pictures, so that the doctor can see the situation inside the patient's body through the screen, which facilitates surgical treatment. .

The traditional endoscope tube is a straight tube and cannot be adjusted, so the field of view is limited. In order to improve the field of view, people have invented endoscopes with adjustable angles. In the existing technology, such endoscopes are mostly gun-shaped. The design of the handle and the drawing adjustment mechanism is very complicated, and drawing requires a special guide structure in the handle. The drawing direction is complicated, which makes the drawing easy to get stuck. Once the drawing gets stuck, the angle cannot be adjusted, and there is no need to return it to the factory for repair. Endoscopes are expensive to buy and repair costs are very high. On the other hand, due to the complicated drawing direction, it will lead to poor adjustment and affect the operating experience. In addition, the gun-shaped handle is inconvenient to operate when held.

Contents of the invention

The purpose of the present invention is to provide an angle-adjustable endoscope to solve the technical problems in the prior art. It is easy to operate, does not cause sticking problems when adjusting the angle, and is not easily damaged.

The invention provides an angle-adjustable endoscope, which includes an endoscope housing. One end of the endoscope housing is connected to a mirror tube, and one end of the endoscope housing close to the mirror tube is provided with There is a wire drawing drive assembly. An adjustment knob is installed on one end of the endoscope housing connected to the mirror tube. The adjustment knob is connected to the wire drawing drive assembly. The end of the mirror tube is connected with an angle adjustment section. , the angle adjustment section is connected to the wire drawing drive assembly through wire drawing.

In the aforementioned angle-adjustable endoscope, preferably, one end of the endoscope housing is formed with a knob mounting portion, the end of the knob mounting portion is formed with a limiting cap mounting portion, and the adjustment knob is sleeved On the knob mounting part, threads are formed on the outer wall of the limiting cap mounting part, a limiting cap is threaded on the limiting cap mounting part, and a mirror tube mounting seat is formed on the end of the limiting cap. , one end of the mirror tube is plugged and connected to the mirror tube mounting base.

In the aforementioned angle-adjustable endoscope, preferably, the knob mounting part is provided with two oppositely arranged through slots, and a cylindrical gear is rotatably installed in the two through slots. The adjustment knob is Internal teeth are formed on the inner wall, and the adjustment knob engages with the columnar gear through the internal teeth.

In the aforementioned angle-adjustable endoscope, preferably, the wire drawing drive assembly includes a ring gear, a first slide block and a second slide block, a ring gear receiving groove is formed in the knob mounting part, and the ring gear is installed In the ring gear receiving groove, the ring gear meshes with the two cylindrical gears, the first slide block and the second slide block are both plug-fitted with the ring gear, and the first slide block First guide plates are arranged at equal intervals on the outer wall, and second guide plates are arranged at equal intervals on the outer wall of the second slider. Both the first guide plates and the second guide plates are arranged at an angle, and the first guide plates are arranged at equal intervals. The guide plate and the second guide plate are arranged one by one oppositely, and two sets of guide rods are provided on the inner wall of the ring gear. The two sets of guide rods are arranged oppositely, and the number of the guide rods in each group is two.

In the aforementioned angle-adjustable endoscope, preferably, the first slider and the second slider are both semicircular tubes, and the first slider and the second slider cooperate with each other. Among the two surfaces, a first semicircular groove is formed on one surface, and a first semicircular convex strip is formed on the other surface. The two sides of the second slider and the first slider match. Among the two surfaces, a second semicircular convex strip slidingly fitting with the first semicircular groove is formed on one face, and a second semicircular convex strip slidingly fitting with the first semicircular convex strip is formed on the other face. Second semicircular groove.

In the aforementioned angle-adjustable endoscope, preferably, a first guide block is provided on the outer wall of one end of the first slider, and a second guide block is provided on the outer wall of the other end. One end of the second slider There is a third guide block on the outer wall of the cap, and a fourth guide block on the outer wall of the other end. Two opposite guide grooves are formed on the inner wall of the limiting cap mounting part. The first guide block and the The third guide block is slidingly matched with the two guide grooves respectively. Two sets of limit baffles are provided in the endoscope housing. The second guide block and the fourth guide block are respectively connected with the two sets of limit baffles. Bit bezel slide fit.

In the aforementioned angle-adjustable endoscope, preferably, the second guide block and the fourth guide block are provided with wire drawing fixing holes, and the angle adjustment section is a snake bone tube. There are two drawing wires, the end of one of the drawing wires is fixed on the second guide block, and the end of the other drawing wire is fixed on the fourth guide block.

In the aforementioned angle-adjustable endoscope, preferably, the endoscope housing is provided with two buttons, and the endoscope housing is provided with a button circuit board. The two buttons and the button Circuit board connections.

In the aforementioned angle-adjustable endoscope, preferably, an LED light source and a PCB control circuit board are provided in the endoscope housing.

In the aforementioned angle-adjustable endoscope, preferably, the scope tube is a plastic hose.

Compared with the prior art, the present invention includes an endoscope housing. One end of the endoscope housing is connected to a mirror tube. An end of the endoscope housing close to the mirror tube is provided with a wire drawing drive assembly. The endoscope housing is connected to the mirror tube. An adjustment knob is installed at one end of the mirror tube connection, and the adjustment knob is connected to the wire drawing drive component. The end of the mirror tube is connected to an angle adjustment section, and the angle adjustment section is connected to the wire drawing drive component through wire drawing. The wire drawing drive component of the present invention is arranged at the end of the endoscope housing. In this way, the wire drawing is directly connected to the wire drawing drive component. There is no need to provide a wire drawing wiring structure in the endoscope housing, thereby simplifying the internal structure of the endoscope housing. , also makes wire drawing easy to install, reduces processing difficulty and production costs, and also reduces the failure rate.

Description of the drawings

Figure 1 is an isometric view of the overall structure of the present invention;

Figure 2 is an exploded view of the handle part of the present invention;

Figure 3 is a schematic structural diagram of the endoscope housing;

Figure 4 is a half-sectional view of the endoscope housing;

Figure 5 is a schematic diagram of the internal structure of the present invention;

Figure 6 is a schematic structural diagram of the first slider and the second slider;

Figure 7 is an isometric view of the ring gear;

Figure 8 is a schematic structural diagram of the mirror tube being a plastic hose.

Explanation of reference signs: Endoscope housing 1, mirror tube 2, adjustment knob 3, angle adjustment section 4, wire drawing 5, knob mounting part 6, limit cap mounting part 7, limit cap 8, mirror tube mounting seat 9 , through slot 10, cylindrical gear 11, internal teeth 12, ring gear 13, first slider 14, second slider 15, ring gear receiving groove 16, first guide plate 17, second guide plate 18, guide rod 19 , the first semicircular groove 20, the first semicircular convex strip 21, the second semicircular convex strip 22, the second semicircular groove 23, the first guide block 24, the second guide block 25, the Three guide blocks 26, guide grooves 27, limit baffles 28, wire drawing fixing holes 29, buttons 30, button circuit board 31, LED light source 32, PCB control circuit board 33, anti-slip protrusions 34, long strip protrusions 35, The fourth guide block 36.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be construed as limiting the present invention.

Embodiment of the present invention: As shown in Figures 1 to 7, an angle-adjustable endoscope includes an endoscope housing 1. The endoscope housing 1 has a straight handle structure. One end of 1 is connected to the mirror tube 2. The end of the endoscope housing 1 close to the mirror tube 2 is provided with a drawing drive assembly. The end of the endoscope housing 1 connected to the mirror tube 2 is rotationally installed with an adjustment knob 3. The adjustment knob 3 is connected to the wire drawing drive assembly. The end of the mirror tube 2 is connected to an angle adjustment section 4. The angle adjustment section 4 is connected to the wire drawing drive assembly through a wire drawing 5.

The adjustment knob 3 is used to drive the wire drawing drive component to move. The wire drawing 5 is adjusted by the movement of the wire drawing drive component. The wire drawing 5 then drives the angle adjustment section 4 to deflect to achieve angle adjustment and improve the visual range.

In a specific implementation, the endoscope housing 1 has a straight handle structure. The endoscope housing 1 is provided with two buttons 30 . The endoscope housing 1 is provided with a button circuit board 31 . Two buttons 30 are provided on the endoscope housing 1 . The button 30 is connected to the button circuit board 31 . The functions of the two buttons 30 can be defined according to usage habits. For example, one button 30 is set for image enlargement, and the other button 30 is set for image reduction. For example, one button 30 is set for screenshots, and the other button 30 is set for video recording control. And Or one button 30 is set to increase the brightness, the other button 30 is set to decrease the brightness, etc. Both the button 30 and the button circuit board 31 are existing components and can be directly purchased.

Furthermore, the endoscope housing 1 is also provided with an LED light source 32 and a PCB control circuit board 33. In this embodiment, from one end to the other end in the endoscope housing 1, there are a wire drawing drive component, a key circuit board 31, LED light source 32 and PCB control circuit board 33. An optical fiber is installed on the LED light source 32. The optical fiber is not shown in the figure. The other end of the optical fiber extends to the end of the mirror tube 2 for providing illumination. The button circuit board 31 and the LED light source 32 are both electrically connected to the PCB control circuit board 33. The PCB control circuit board 33 is also connected to a data line. The data line extends from the tail of the endoscope housing 1, and the end of the data line is set There are connecting terminals, and the data cables and connecting terminals are not shown in the figure. The data cables and connecting terminals are existing technologies and can be purchased directly.

Furthermore, one end of the endoscope housing 1 is formed with a knob mounting part 6, and the end of the knob mounting part 6 is formed with a limiting cap mounting part 7. Both the knob mounting part 6 and the limiting cap mounting part 7 are circular tube structures, and the knob is The outer wall of the mounting part 6 is a smooth surface. The adjusting knob 3 is sleeved on the knob mounting part 6. The adjusting knob 3 has a ring-shaped structure. The adjusting knob 3 can rotate on the knob mounting part 6. The outer wall of the limiting cap mounting part 7 There are external threads formed on the limit cap mounting part 7, and the limit cap 8 is threadedly connected to the limit cap installation part 7. The limit cap 8 has a conical structure, and the inner wall surface of the limit cap 8 has internal threads. The end of the limit cap 8 is formed with Mirror tube mounting base 9, one end of the mirror tube 2 is plugged into and fixed with the mirror tube mounting base 9.

The connecting transition position between the knob mounting part 6 and the endoscope housing 1 forms a limiting boss. One end of the adjusting knob 3 is in contact with the limiting boss, and the other end of the adjusting knob 3 is in contact with one end of the limiting cap 8. The position cap 8 is used to limit the axial position of the adjustment knob 3 and is used to connect the mirror tube 2. The mirror tube 2 and the mirror tube mounting seat 9 are preferably an interference fit. Of course, they can also be fixed by bonding, welding and other methods. , to prevent the mirror tube 2 from falling off the mirror tube mounting base 9. Preferably, in order to prevent slipping when rotating the adjusting knob 3, anti-slip protrusions 34 are provided on the outer wall of the adjusting knob 3.

Furthermore, the knob mounting part 6 is provided with two oppositely arranged through slots 10 , that is, the two through slots 10 are symmetrical with respect to the axis of the knob mounting part 6 , and a cylindrical gear 11 is rotatably installed in the two through slots 10 . The axis of the gear 11 is parallel to the axis of the knob mounting part 6. Internal teeth 12 are formed on the inner wall of the adjustment knob 3. The adjustment knob 3 meshes with the columnar gear 11 through the internal teeth 12. It should be noted that the cylindrical gear 11 is installed in the through slot 10 and can only rotate without causing axial displacement. The specifications of the two columnar gears 11 are exactly the same. In this embodiment, the number of cylindrical gears 11 is two. Of course, more cylindrical gears 11 or only one cylindrical gear 11 can be provided according to requirements. In this embodiment, setting two cylindrical gears 11 is a preferred solution. Two cylindrical gears 11 It can not only ensure the balance of force transmission, but also make the force received by the wire drawing drive assembly be uniform, and two columnar gears 11 are provided, one of which is damaged and the other can continue to work, which does not hinder the normal use of the present invention.

Further, the wire drawing drive assembly includes a ring gear 13, a first slide block 14 and a second slide block 15. A ring gear receiving groove 16 is formed in the knob mounting part 6, and the ring gear 13 is installed in the ring gear receiving groove 16. The ring gear 13 The first slider 14 and the second slider 15 are meshed with the two cylindrical gears 11. Both the first slider 14 and the second slider 15 are plug-fitted with the ring gear 13. A plurality of first guide plates 17 are arranged on the outer wall of the first slider 14 at equal intervals. A plurality of second guide plates 18 are arranged at equal intervals on the outer wall of the slider 15. The first guide plates 17 and the second guide plates 18 are both arranged obliquely. The first guide plates 17 and the second guide plates 18 are arranged opposite each other one by one. Two sets of guide rods 19 are provided on the inner wall of the ring 13. The two sets of guide rods 19 are arranged oppositely, and the number of each set of guide rods 19 is two.

In this embodiment, preferably, both the first guide plate 17 and the second guide plate 18 are inclined toward the side where the mirror tube 2 is located, and the inclination angles of the first guide plate 17 and the second guide plate 18 can be set according to needs. When the ring gear 13 rotates driven by the two cylindrical gears 11, the two sets of guide rods 19 drive the first guide plate 17 and the second guide plate 18 respectively, so that the first slide block 14 and the second slide block 15 move in opposite directions. By moving in the direction, one drawing wire 5 is pushed and the other drawing wire 5 is pulled, thereby changing the angle of the angle adjustment section 4 .

Specifically, the first slider 14 and the second slider 15 are both semicircular tubes. Among the two surfaces of the first slider 14 and the second slider 15, a first semicircle is formed on one surface. shaped groove 20, a first semicircular convex strip 21 is formed on the other surface, and of the two surfaces of the second slider 15 and the first slider 14, one surface is formed with a first semicircular protrusion 21. The second semicircular convex strip 22 slidingly fits into the shaped groove 20, and a second semicircular groove 23 slidingly fitting into the first semicircular convex strip 21 is formed on the other surface.

The first slider 14 and the second slider 15 are buckled together to form a complete circular tube. The first slider 14 and the second slider 15 slide and fit together. The first semicircular groove 20 and the second semicircular The cooperation of the shaped convex strips 22 and the cooperation of the first semicircular convex strips 21 and the second semicircular grooves 23 allows the first slider 14 and the second slider 15 to snap together without misalignment. The inner diameter and outer diameter of the sliding block 14 and the second sliding block 15 are equal. The first guide plate 17 and the second guide plate 18 are symmetrical with respect to the axis of the endoscope housing 1. In order to reduce the friction resistance between the inner ring of the ring gear 13 and the first guide plate 17 and the second guide plate 18, it is preferable to A plurality of elongated protrusions 35 are arranged at equal intervals on the inner wall of the ring gear 13 . The length of the elongated protrusions 35 is equal to the length of the ring gear 13 . The outer walls of the first guide plate 17 and the second guide plate 18 are in contact with the elongated protrusion 35. When the angle adjustment section 4 is in a straight state, the first slider 14 and the second slider 15 are completely opposite, and the first guide plate 17 and the second guide plate 18 are opposite one by one. At this time, one set of guide rods 19 is located at the upper ends of the first guide plate 17 and the second guide plate 18 (i.e., the 12 o'clock position), and the other set of guide rods 19 is located at the first At the lower end of the guide plate 17 and the second guide plate 18 (i.e., the 6 o'clock position), the number of each set of guide rods 19 is two, and one set of guide rods 19 is clamped on the first guide plate 17 and the second guide plate 18 , another set of guide rods 19 is located between two adjacent first guide plates 17 .

In order to ensure that the first slide block 14 and the second slide block 15 move in the axial direction without circumferential rotation, further, a first guide block 24 is provided on the outer wall of one end of the first slide block 14. The second guide block 25 is provided on the outer wall of the other end of the second slide block 14, the third guide block 26 is provided on the outer wall of one end of the second slide block 15, and the fourth guide block 36 is provided on the outer wall of the other end of the second slide block 15. Two opposite guide grooves 27 are formed on the inner wall of the limit cap installation part 7. The two guide grooves 27 are parallel to the axis of the limit cap installation part 7. The first guide block 24 and the third guide block 26 are respectively connected with the two guide grooves 27. The guide groove 27 is in sliding fit, and two sets of limit baffles 28 are provided in the endoscope housing 1. The second guide block 25 and the fourth guide block 36 are respectively in sliding fit with the two sets of limit baffles 28. Each set of limiting baffles 28 is composed of two baffles. There is a gap between the two baffles, so that the second guide block 25 and the fourth guide block 36 can only move along the axial direction of the endoscope housing 1 .

Furthermore, the second guide block 25 and the fourth guide block 36 are provided with wire drawing fixing holes 29, and the angle adjustment section 4 is a snake bone tube. The snake bone tube is provided with two wire drawings 5, one of which is the end of the wire drawing 5. It is fixed on the second guide block 25, and the end of the other drawing wire 5 is fixed on the fourth guide block 36. It should be noted that the snake bone tube is a mature existing technology and can be obtained directly through purchasing. The structure of the snake bone tube and how the drawing wire 5 is connected to the snake bone tube will not be described in detail here.

This product also includes a camera, which is set at the end of the snake tube. The camera's wiring harness passes through the circular tube composed of the first slider 14 and the second slider 15, and is electrically connected to the PCB control circuit board 33. Similarly , the optical fiber passes through the circular tube formed by the first slider 14 and the second slider 15 and extends to the end of the snake tube. The number of cameras can be set according to needs. For example, one camera or two cameras can be set. When using two cameras, the shooting angle is wider.

In addition, there are two options for the mirror tube 2. Option 1: The mirror tube 2 adopts a metal straight tube solution. The metal straight tube solution is used to make the mirror tube 2 have sufficient stiffness; Option 2: Please refer to Figure 8 for the design of the mirror tube 2. It is a plastic hose. When using the second option, the mirror tube 2 can be bent along the natural holes in the human body, so that the camera at the end of the snake bone tube can reach the target position.

The working principle of the present invention: when the angle of the snake tube needs to be adjusted, the adjusting knob 3 is rotated. The adjusting knob 3 drives the two cylindrical gears 11 to rotate. The two cylindrical gears 11 drive the ring gear 13 to rotate. When the ring gear 13 rotates, the inside of the ring gear 13 rotates. Two sets of guide rods 19 on the ring move. One set of guide rods 19 drives the first guide plate 17, and the other set of guide rods 19 drives the second guide plate 18. Between the first guide block 24 and the third guide block 26, With the cooperation of the guide groove 27 and the cooperation of the second guide block 25 and the third guide block 26 with the limiting baffle 28, the first slide block 14 and the second slide block 15 cannot rotate and can only move along the endoscope. When the mirror housing 1 moves axially, since the first guide plate 17 and the second guide plate 18 are symmetrically designed and arranged obliquely, the first slider 14 and the second slider 15 move in opposite directions when the ring gear 13 rotates. Move so that one of the two drawing wires 5 is pushed and one is pulled to change the angle of the serpentine tube and realize the adjustment of the angle of the endoscope.

Adopting the structure of the present invention, the wire drawing 5 enters the endoscope housing 1 and is directly connected to the second guide block 25 and the fourth guide block 36, eliminating the need for the complicated wiring structure of the traditional technology and the need for the endoscope housing. The wire trough is provided in 1, which greatly optimizes the internal structure of the endoscope housing 1, and also reduces the difficulty of installation and production, and effectively solves the jamming problem and reduces the failure rate. The structural design of the invention has a small bridge deck space and is very convenient to operate. The endoscope housing 1 adopts a straight handle structure, which is convenient for doctors to hold and improves maneuverability.

The structure, features and effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above descriptions are only preferred embodiments of the present invention. However, the implementation scope of the present invention is not limited by the drawings. Any changes made to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, shall be within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and drawings.

Claims (7)

1. An endoscope with adjustable angle, including an endoscope housing (1), characterized in that: one end of the endoscope housing (1) is connected to a mirror tube (2), and the endoscope The end of the endoscope housing (1) close to the mirror tube (2) is provided with a wire drawing drive assembly, and the end of the endoscope housing (1) connected to the mirror tube (2) is rotationally installed with an adjustment knob ( 3), the adjustment knob (3) is connected to the wire drawing drive assembly, the end of the mirror tube (2) is connected to an angle adjustment section (4), and the angle adjustment section (4) is passed through the wire drawing (5) Connected to the wire drawing drive assembly; One end of the endoscope housing (1) is formed with a knob mounting portion (6), and the end of the knob mounting portion (6) is formed with a limiting cap mounting portion (7). The adjustment knob (3) is Connected to the knob installation part (6), threads are formed on the outer wall of the limit cap installation part (7), and the limit cap (8) is threaded on the limit cap installation part (7), so A mirror tube mounting seat (9) is formed at the end of the limiting cap (8), and one end of the mirror tube (2) is plug-connected to the mirror tube mounting seat (9); The knob mounting part (6) is provided with two oppositely arranged through slots (10), and a cylindrical gear (11) is rotatably installed in the two through slots (10). The adjusting knob (3) Internal teeth (12) are formed on the inner wall, and the adjustment knob (3) meshes with the columnar gear (11) through the internal teeth (12); The wire drawing drive assembly includes a ring gear (13), a first slide block (14) and a second slide block (15). A ring gear receiving groove (16) is formed in the knob mounting part (6). The ring (13) is installed in the ring gear receiving groove (16). The ring gear (13) meshes with the two cylindrical gears (11). The first slider (14) and the second The sliders (15) are all plug-fitted with the ring gear (13). First guide plates (17) are arranged at equal intervals on the outer wall of the first slider (14). The second slider (15) ) are provided with second guide plates (18) at equal intervals on the outer wall. The first guide plate (17) and the second guide plate (18) are both arranged obliquely. The second guide plates (18) are arranged one by one oppositely, and two sets of guide rods (19) are provided on the inner wall of the ring gear (13). The two sets of guide rods (19) are arranged oppositely, and each set of guide rods (19) The number of rods (19) is two. 2. The angle-adjustable endoscope according to claim 1, characterized in that: both the first slider (14) and the second slider (15) are semicircular tubes, and the third Among the two surfaces of a slider (14) that match the second slider (15), a first semicircular groove (20) is formed on one surface, and a first semicircular groove (20) is formed on the other surface. Semi-circular protrusions (21). Among the two surfaces of the second slider (15) that match the first slider (14), one surface is formed with a semicircle that matches the first semicircle. A second semicircular convex strip (22) that slides with the first semicircular convex strip (21) is formed on the other surface. twenty three). 3. The angle-adjustable endoscope according to claim 2, characterized in that: a first guide block (24) is provided on the outer wall of one end of the first slider (14), and a first guide block (24) is provided on the outer wall of the other end. There is a second guide block (25), a third guide block (26) is provided on the outer wall of one end of the second slide block (15), and a fourth guide block (36) is provided on the outer wall of the other end. Two opposite guide grooves (27) are formed on the inner wall of the cap mounting portion (7), and the first guide block (24) and the third guide block (26) are respectively connected with the two guide grooves (27). 27) Sliding fit, two sets of limiting baffles (28) are provided in the endoscope housing (1), and the second guide block (25) and the fourth guide block (36) are respectively connected with the two sets of limit baffles (28). The limiting baffle (28) is slidingly fitted. 4. The angle-adjustable endoscope according to claim 3, characterized in that: the second guide block (25) and the fourth guide block (36) are provided with wire drawing fixing holes (29), The angle adjustment section (4) is a snake tube, and two drawing wires (5) are provided on the snake tube, and the end of one of the drawing wires (5) is fixed on the second guide block. (25), the end of the other drawing wire (5) is fixed on the fourth guide block (36). 5. The angle-adjustable endoscope according to any one of claims 1 to 4, characterized in that: the endoscope housing (1) is provided with two buttons (30). A button circuit board (31) is provided in the mirror housing (1), and the two buttons (30) are connected to the button circuit board (31). 6. The angle-adjustable endoscope according to claim 5, characterized in that: the endoscope housing (1) is provided with an LED light source (32) and a PCB control circuit board (33). 7. The angle-adjustable endoscope according to claim 6, characterized in that the scope tube (2) is a plastic hose.