An endoscope

Abstract

The present application discloses an endoscope, comprising a mirror body; a first tube, the first tube is rotatably connected to the mirror body; a push rod, the push rod is spline-connected to the first tube; a pull rod, the pull rod is arranged inside the push rod, and the end of the pull rod passes through the push rod; a nozzle, the nozzle is rotatably connected to the end of the push rod; a first trigger, the first trigger is connected to the push rod; and a second trigger, the second trigger is connected to the pull rod. The present application integrates the first, second, third, and fourth triggers, which respectively control different actions of the nozzle. When anesthesia is required for a certain area in the body during surgery, local anesthesia can be achieved through the nozzle, and the operation is simple and convenient; pressing the first trigger can move the push rod forward to expose the nozzle and the position can be locked; when the second trigger is pressed, the first tube reciprocates to make the nozzle swing back and forth, and anesthetics are sprayed through the nozzle at the same time, and due to the cooperation of the arc-shaped rack, cam, and tilting rod, the arc-shaped rack can drive the cam to rotate multiple times in one back and forth stroke, so that the anesthetic spraying is more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and in particular to an endoscope. Background Art

[0002] An endoscope is a medical device that can enter the human body through natural channels or small incisions made during surgery. It allows doctors to directly observe the pathological conditions of internal organs and tissues of the human body, and plays an extremely important role in the diagnosis and treatment process.

[0003] During the operation, when the endoscope passes through a narrow section or an area with a disease, the patient may feel severe abdominal pain and bloating. If the patient cannot tolerate it, additional anesthesia measures may be needed. However, the existing anesthesia methods have major drawbacks. For example, local anesthesia requires a certain amount of time to take effect; spraying anesthesia on the diseased area requires the replacement of different surgical instruments, which will also increase the duration of the operation. Summary of the invention

[0004] The purpose of the present application is to provide an endoscope that can quickly perform local anesthesia in order to improve endoscopic examination.

[0005] An endoscope provided in the present application adopts the following technical solution: it includes a scope body; a first tube, the first tube is rotatably connected to the scope body; a push rod, the push rod is spline-connected to the first tube; a pull rod, the pull rod is arranged inside the push rod, and the end of the pull rod passes through the push rod; a spray head, the spray head is rotatably connected to the end of the push rod; a first trigger, the first trigger is connected to the push rod; a second trigger, the second trigger is connected to the pull rod; when the first trigger is pressed, the first trigger can push the push rod to move, so that the spray head extends out of the first tube, and when the second trigger is pressed, the first tube can reciprocate, so that the spray head can rotate with the first tube and can spray liquid.

[0006] Optionally, the mirror body is fixedly connected to a rear grip, the second trigger is rotatably connected to the rear grip, the second trigger is fixedly connected to an arc-shaped rack, the center of the arc-shaped rack coincides with the rotation point of the second trigger, the rear grip is rotatably connected to a cam, the cam and the arc-shaped rack are connected by a gear, an eccentric rod is fixedly connected to the outer surface of the first tube, the axis of the eccentric rod is eccentrically arranged to the axis of the first tube, the eccentric rod sleeve is provided with a driving rod, the rear grip is rotatably connected to a cocking rod, a roller is installed at one end of the cocking rod, the roller abuts against the cam, the cocking rod is provided with a first slide groove, the driving rod is slidably connected to the first slide groove, and the rotation center of the cocking rod is located between the roller and the first slide groove.

[0007] Optionally, the rear grip is rotatably connected to a third trigger, the third trigger is provided with a second slide groove, the drive rod is provided with a third slide groove, the third slide groove is slidably connected to the first block, the first block is slidably connected to the second slide groove, the rear grip is rotatably connected to a second limit rod, the second limit rod and the third trigger are connected by one-way teeth, a third torsion spring is provided between the second limit rod and the rear grip, and the third torsion spring forces the second limit rod to rotate in a certain direction.

[0008] Optionally, the rear grip is fixedly connected to a fixed block, the fixed block passes through the second trigger, the first trigger is rotatably connected to the fixed block, the fixed block is rotatably connected to a first lever, the fixed block is rotatably connected to a connecting piece, the connecting piece is rotatably connected to the first trigger and the connecting piece respectively, a driving block is provided at the end of the first lever, and the push rod is fixedly connected to the driving block.

[0009] Optionally, the rear handle is rotatably connected to a first limit rod, the first limit rod is engaged with the first lever through one-way teeth, a first torsion spring is provided between the first lever and the rear handle, the first torsion spring drives the first lever to rotate unidirectionally, and a second torsion spring is provided between the first limit rod and the mirror body, the second torsion spring forces the first limit rod to rotate toward the first lever.

[0010] Optionally, a connecting rod is slidably connected inside the push rod, the connecting rod passes through the driving block, and is fixedly connected to the mirror body. A first channel is provided in the push rod, a third channel is provided in the mirror body, a second channel connecting the first channel and the third channel is provided in the connecting rod, the first channel is connected to the nozzle, a power chamber connected to the third channel is provided in the mirror body, a piston is provided in the power chamber, and the piston is connected to the first trigger through a plurality of connecting rods.

[0011] Optionally, the nozzle is provided with an arc groove, the end of the push rod is slidably connected to the arc groove, the connecting rod sleeve is provided with a connecting block, the connecting block is fixedly connected to the pull rod, a first spring is provided between the connecting block and the driving block, the first spring forces the connecting block to move toward the nozzle direction, the rear handle is rotatably connected to a fourth trigger, the fourth trigger is slidably connected to a moving rod, the end of the moving rod is rotatably connected to the driving block, the driving block is slidably connected to a third limit rod, and the third limit rod is connected to the one-way tooth of the fourth trigger.

[0012] Optionally, the second trigger is connected to the rear grip via an elastic sheet.

[0013] In summary, the present application includes at least one of the following beneficial technical effects:

[0014] The first, second, third and fourth triggers are integrated to control different actions of the nozzle respectively. When anesthesia is required for a certain area in the body during surgery, local anesthesia can be achieved through the nozzle, which is simple and convenient to operate. Pressing the first trigger can move the push rod forward to expose the nozzle and the position can be locked. When the second trigger is pressed, the first tube reciprocates to make the nozzle swing back and forth, and anesthetic is sprayed through the nozzle. Due to the coordination of the arc-shaped rack, cam, and tilting rod, one back and forth stroke of the arc-shaped rack can drive the cam to rotate multiple times, making the anesthetic spraying more uniform. When the second trigger is pressed, at the same time, the push rod moves forward to expose the nozzle and the position can be locked. The piston can be pushed to move under the action of the first rod, the second rod, the first one-way valve and the second one-way valve to realize the delivery of anesthetics, so that the nozzle can spray the medicine while swinging back and forth; pulling the third trigger can adjust the reciprocating rotation amplitude of the first tube, and due to the interaction between the third trigger, the driving rod, the tension spring, the second limit rod and other structures, the swing amplitude of the nozzle can be adjusted, and the pulling and resetting of the third trigger have corresponding control mechanisms; pulling the fourth trigger can pull the pull rod to adjust the angle of the nozzle, and when the first trigger is pulled to move the driving block, the nozzle angle will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0016] Figure 2 This application Figure 1 A truncated view of

[0017] Figure 3 This application Figure 2 A partial enlarged view of point a in the middle;

[0018] Figure 4 is a schematic structural diagram of the eccentric rod in Example 1 of the present application;

[0019] Figure 5 is a schematic diagram of the structure of the driving block in Example 1 of the present application;

[0020] Figure 6 This application Figure 2 A partial enlarged view of point b in the middle;

[0021] Figure 7 is a schematic diagram of the structure of the power chamber in Example 1 of the present application;

[0022] Figure 8 This application Figure 2 A partial enlarged view of point c in the middle;

[0023] Description of reference numerals: 1, first trigger; 11, connecting member; 12, first lever; 13, driving block; 14, first limiting lever; 15, fixing block; 16, first torsion spring; 17, second torsion spring; 18, connecting rod; 19, connecting block; 191, first spring; 192, second channel; 193, third channel; 2, second trigger; 21, arc-shaped rack; 22, cam; 23, tilting lever; 24, roller; 25, first slide groove; 26, third slide groove; 27, first block; 2 8. driving rod; 29. ​​eccentric rod; 3. third trigger; 31. second limit rod; 32. third torsion spring; 33. tension spring; 34. second slide groove; 4. fourth trigger; 41. third limit rod; 42. moving rod; 5. mirror body; 6. rear grip; 7. nozzle; 71. arc groove; 8. first tube; 81. push rod; 82. pull rod; 83. first channel; 9. power chamber; 91. first one-way valve; 92. second one-way valve; 93. first rod; 94. piston; 95. second rod. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 -Attached Figure 8 This application is described in further detail.

[0025] The embodiment of the present application discloses an endoscope.

[0026] Example 1, reference Figure 1 and Figure 2 An endoscope includes a body 5, a first trigger 1, a second trigger 2, a third trigger 3, a fourth trigger 4, a first tube 8 rotatably connected to the body, a push rod 81 penetrating the first tube 8, a pull rod 82 penetrating the push rod 81, a nozzle 7 disposed at the end of the push rod 81, and a rear grip 6 fixedly connected to the body 5. The first tube 8 is spline-connected to the push rod 81, so that when the first tube 8 rotates, the push rod 81 can be driven to rotate. When the first trigger 1 is pressed, the push rod 81 will move forward to The nozzle 7 is exposed from the mirror body 5, and the position of the nozzle 7 can be locked; when the second trigger 2 is pressed, the first tube 8 will rotate back and forth, so that the nozzle 7 can swing back and forth, and at the same time, the anesthetic is sprayed through the nozzle 7; when the third trigger 3 is pressed, the amplitude of the reciprocating rotation of the first tube 8 can be adjusted, and when the third trigger 3 is in different positions, the amplitude of the reciprocating rotation of the first tube 8 is different; when the fourth trigger 4 is pressed, the pull rod 82 will pull the nozzle 7, so that the angle of the nozzle 7 is adjusted. The first trigger 1, the second trigger 2, the third trigger 3, and the fourth trigger 4 respectively perform one or more actions of the nozzle 7, and thus integrated into the endoscope, when anesthesia is needed for a certain area in the body during surgery, local anesthesia of the area is achieved through the nozzle 7, and the operation is simple and convenient.

[0027] refer to Figure 2 and Figure 3An elastic steel sheet is provided between the second trigger 2 and the rear grip 6, through which the second trigger 2 and the rear grip 6 are kept open, the second trigger 2 and the rear grip 6 are rotatably connected, the second trigger 2 is fixedly connected with an arc-shaped rack 21, the arc-shaped rack 21 is close to the rotation point of the second trigger 2, the center of the arc-shaped rack 21 coincides with the rotation point of the second trigger 2, the rear grip 6 is rotatably connected with a cam 22, the cam 22 and the arc-shaped rack 21 are connected through a gear, the rear grip 6 is rotatably connected with the cam 22, the cam 22 and the arc-shaped rack 21 are connected through a gear, so that when the second trigger 2 is pressed, the arc-shaped rack 21 will rotate with the second trigger 2, and under the action of the gear, the cam 22 will rotate, the pinion used in embodiment 1 is used as a connection, so that a back and forth stroke of the arc-shaped rack 21 can drive the cam 22 to rotate multiple circles.

[0028] refer to Figure 3 and Figure 4 An eccentric rod 29 is fixedly connected to the outer surface of the first tube 8, and the axis of the eccentric rod 29 is eccentrically arranged with the axis of the first tube 8. The eccentric rod 29 is sleeved with a driving rod 28. The rear grip 6 is rotatably connected with a tilting rod 23. A roller 24 is installed at one end of the tilting rod 23. The roller 24 abuts against the cam 22. The tilting rod 23 is provided with a first slide groove 25. The driving rod 28 is slidably connected with the first slide groove 25. The rotation center of the tilting rod 23 is located between the roller 24 and the first slide groove 25. In this way, the tilting rod 23 forms a lever, and the tilting stem will swing up and down with the rotation of the cam 22. The first tube 8 is pulled to rotate by the power rod to realize the reciprocating rotation of the first tube 8. When the angle of the nozzle 7 changes, the nozzle 7 is reciprocated by the reciprocating rotation of the first tube 8, so that the anesthetic spraying is more uniform.

[0029] refer to Figure 3The rear grip 6 is rotatably connected to the third trigger 3, which is connected to the second trigger 2 by a tension spring 33. The tension spring 33 forces one end of the third trigger 3 to approach the second trigger 2. The third trigger 3 is provided with a second slide groove 34. The driving rod 28 is provided with a third slide groove 26. The third slide groove 26 is slidably connected to the first block 27. The first block 27 is slidably connected to the second slide groove 34. The rear grip 6 is rotatably connected to the second limit rod 31. The second limit rod 31 is connected to the third trigger 3 by a one-way tooth. A third torsion spring 32 is provided between the second limit rod 31 and the rear grip 6. The third torsion spring 32 forces the second limit rod 31 to rotate in a direction. The second slide groove 34 has a slope / arc. When the third trigger 3 is pressed, the third trigger 3 rotates counterclockwise, and the second slide groove 34 drives the first block 27 to move rightward, so that the driving rod 28 is close to the rotation point of the tilting rod 23, so that the amplitude of the up and down swing of the driving rod 28 is reduced, and the swing amplitude of the nozzle 7 can be adjusted easily. Since the second limit rod 31 is connected to the third trigger 3 via a one-way tooth, the third trigger 3 will not be restricted by the second limit rod 31 when being pulled. When the force pulling the third trigger 3 is removed, the second limit rod 31 prevents the third trigger 3 from being reset under the action of the tension spring 33. When the second limit rod 31 is depressed, the restriction on the third trigger 3 is released, so that the third trigger 3 can be reset under the action of the tension spring 33.

[0030] refer to Figure 5 The rear grip 6 is fixedly connected with a fixing block 15, and the fixing block 15 passes through the second trigger 2. The first trigger 1 is rotatably connected with the fixing block 15, and the fixing block 15 is rotatably connected with the first lever 12. The fixing block 15 is rotatably connected with a connecting piece 11, and the connecting piece 11 is rotatably connected with the first trigger 1 and the connecting piece 11 respectively. The mirror body 5 is slidably connected with a driving block 13, and the driving block 13 is provided with an annular cavity. The first lever 12 extends into the annular cavity, and the driving block 13 is fixedly connected with the push rod 81. In this way, when the first trigger 1 is pressed, the first trigger 1 rotates clockwise, and the first trigger 1 drives the connecting piece 11 to rotate counterclockwise, and the connecting piece 11 drives the first lever 12 to rotate counterclockwise, which can drive the driving block 13 to move forward, so that the nozzle 7 extends out of the mirror body 5; during the rotation of the first lever 12, since the first limiting rod 14 is connected with the one-way teeth of the first lever 12, the first trigger 1 can stay in a suitable position, and when the first limiting rod 14 is pressed, the restriction on the first limiting rod 14 can be released.

[0031] refer to Figure 6 and Figure 7The push rod 81 is slidably connected with a connecting rod 18, the connecting rod 18 passes through the driving block 13, and the connecting rod 18 is fixedly connected to the mirror body 5. The push rod 81 is provided with a first channel 83, the mirror body 5 is provided with a third channel 193, the connecting rod 18 is provided with a second channel 192 connecting the first channel 83 and the third channel 193, the first channel 83 is connected to the nozzle 7, the mirror body 5 is provided with a power chamber 9 connected to the third channel 193, the power chamber 9 is provided with a piston 94, and the piston 94 is fixedly connected with a piston 94 passing through the mirror body 5, the end of the first rod 93 is rotatably connected to the second rod 95, the end of the second rod 95 is rotatably connected to the second trigger 2, a first one-way valve 91 and a second one-way valve 92 are arranged in the mirror body 5, when the second trigger 2 is pressed, the piston 94 is pushed to move under the action of the first rod 93 and the second rod 95, and the delivery of the anesthetic is realized in cooperation with the first one-way valve 91 and the second one-way valve 92, so that when the second trigger 2 is pressed, the nozzle 7 can realize both reciprocating swing and drug spraying.

[0032] refer to Figure 8 The nozzle 7 is provided with an arc groove 71, the end of the push rod 81 is slidably connected to the arc groove 71, the connecting rod 18 is sleeved with a connecting block 19, the connecting block 19 is fixedly connected to the pull rod 82, a first spring 191 is provided between the connecting block 19 and the driving block 13, the first spring 191 forces the connecting block 19 to move toward the nozzle 7, the rear grip 6 is rotatably connected to the fourth trigger 4, the fourth trigger 4 is slidably connected to the moving rod 42, the end of the moving rod 42 is rotatably connected to the driving block 13, the driving block 13 is slidably connected to the third limiting rod 41, and the third limiting rod 41 is connected to the fourth trigger 4 in a one-way tooth connection. When the first trigger 1 is pulled, the driving block 13 will move to the left, driving the moving rod 42 and the fourth trigger 4 to rotate, so that the angle of the nozzle 7 is not affected. Only when the fourth trigger 4 is pulled, the fourth trigger 4 will drive the pull rod 82 to move, so that the angle of the nozzle 7 can be adjusted.

[0033] The implementation principle of an endoscope in the embodiment of the present application is as follows: the endoscope is mainly composed of a body 5, a first trigger 1, a second trigger 2, a third trigger 3, a fourth trigger 4, a first tube 8, a push rod 81, a pull rod 82, a nozzle 7 and a rear grip 6. The first tube 8 is connected to the push rod 81 through a spline, so that the push rod 81 can be driven to rotate when the first tube 8 rotates;

[0034] When the first trigger 1 is pulled, the first trigger 1 rotates clockwise, driving the connecting member 11 to rotate counterclockwise, and the connecting member 11 drives the first lever 12 to rotate counterclockwise, thereby causing the driving block 13 fixedly connected to the push rod 81 to move forward, so that the push rod 81 moves forward, and the nozzle 7 is exposed from the mirror body 5. In this process, since the first limiting rod 14 and the first lever 12 are connected by a one-way tooth connection, the first trigger 1 can stay in a suitable position, and if the first limiting rod 14 is pulled, the restriction on the first lever 12 can be released;

[0035] When the second trigger 2 is pressed, first, the second trigger 2 and the rear grip 6 are kept open by the elastic steel sheet and the two are connected in rotation, and the arc rack 21 fixed on the second trigger 2 will rotate with the trigger. Because the arc rack 21 is connected to the cam 22 connected in rotation on the rear grip 6 through a pinion, the cam 22 will rotate accordingly. At the same time, the eccentric rod 29 eccentrically arranged on the outer surface of the first tube 8 is sleeved with a driving rod 28, and the roller 24 at one end of the tilting rod 23 on the rear grip 6 abuts against the cam 22, and the driving rod 28 is slidably connected with the first slide groove 25 of the tilting rod 23. The tilting rod 23 takes the point between the roller 24 and the first slide groove 25 as the rotation center, swings up and down like a lever, and pulls the first tube 8 to rotate back and forth through the driving rod 28, thereby driving the push rod 81 to rotate, so that the nozzle 7 swings back and forth. Moreover, there is a connecting rod 18 in the push rod 81 that penetrates the drive block 13 and is fixed to the mirror body 5. The first channel 83 in the push rod 81, the third channel 193 in the mirror body 5, the second channel 192 in the drive block 13 that connects the two, and the nozzle 7 that connects with the first channel 83 constitute an anesthetic delivery channel. The piston 94 in the power chamber 9 in the mirror body 5 is connected to the first rod 93 that penetrates the mirror body 5. The end of the first rod 93 is rotatably connected to the second rod 95, and the end of the second rod 95 is connected to the second trigger 2. At the same time, there are a first check valve 91 and a second check valve 92 in the mirror body 5. When the second trigger 2 is pressed, the piston 94 is pushed to move under the action of the first rod 93 and the second rod 95, and the two check valves are cooperated to realize the anesthetic spraying from the nozzle 7, that is, the nozzle 7 can spray the medicine while swinging back and forth;

[0036] For the adjustment of the swing amplitude of the nozzle 7, the third trigger 3 is connected to the second trigger 2 through a tension spring 33, the third trigger 3 is provided with a second slide groove 34 with a slope or arc, the driving rod 28 is provided with a third slide groove 26, and the first block 27 in the third slide groove 26 is slidably connected to the second slide groove 34. The rear grip 6 is also rotatably connected to the second limit rod 31, which is connected to the third trigger 3 through a one-way tooth and a third torsion spring 32 is provided between the two. When the third trigger 3 is pressed, the third trigger 3 rotates counterclockwise, and the second slide groove 34 drives the first block 27 to move rightward, so that the driving rod 28 is close to the rotation point of the tilting rod 23, so that the swing amplitude of the driving rod 28 is reduced, thereby achieving the adjustment of the swing amplitude of the nozzle 7. During the process of pulling the third trigger 3, due to the one-way tooth connection, the third trigger 3 is not restricted by the second limiting rod 31. When the external force on the third trigger 3 is removed, the second limiting rod 31 can prevent the third trigger 3 from being reset under the action of the tension spring 33. Only when the second limiting rod 31 is pulled down can the restriction on the third trigger 3 be released, so that the third trigger 3 can be reset under the action of the tension spring 33.

[0037] The angle of the nozzle 7 is adjusted by providing an arc groove 71 on the nozzle 7, the end of the push rod 81 is slidably connected thereto, the connection block 19 on the connection rod 18 is fixedly connected to the pull rod 82, and a first spring 191 is provided between the connection block 19 and the driving block 13, and the first spring 191 makes the connection block 19 tend to move toward the nozzle 7. The rear grip 6 is rotatably connected to the fourth trigger 4, the fourth trigger 4 is slidably connected to the moving rod 42, the end of the moving rod 42 is rotatably connected to the driving block 13, the driving block 13 is slidably connected to the third limit rod 41, and the third limit rod 41 is connected to the one-way teeth of the fourth trigger 4. When the first trigger 1 is pulled, the driving block 13 moves to the left, which will drive the moving rod 42 and the fourth trigger 4 to rotate, but will not affect the angle of the nozzle 7. Only when the fourth trigger 4 is pulled, the fourth trigger 4 will drive the pull rod 82 to move, thereby changing the angle of the nozzle 7. During surgery, when anesthesia is required for a certain area in the body, local anesthesia of the area can be conveniently achieved by controlling different actions of the nozzle 7 through four triggers.

[0038] 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 endoscope, characterized in that: include Mirror body (5); A first tube (8), the first tube (8) being rotatably connected to the mirror body (5); A push rod (81), the push rod (81) being spline-connected to the first tube (8); A pull rod (82), wherein the pull rod (82) is disposed inside the push rod (81), and an end of the pull rod (82) passes through the push rod (81); A spray head (7), the spray head (7) being rotatably connected to the end of the push rod (81); A first trigger (1), the first trigger (1) being connected to the push rod (81); a second trigger (2), the second trigger (2) being connected to the pull rod (82); When the first trigger (1) is pressed, the first trigger (1) can push the push rod (81) to move, so that the spray head (7) extends out of the first tube (8); when the second trigger (2) is pressed, the first tube (8) can reciprocate, so that the spray head (7) can rotate along with the first tube (8) and can spray liquid; The mirror body (5) is fixedly connected to a rear grip (6); the second trigger (2) is rotatably connected to the rear grip (6); the second trigger (2) is fixedly connected to an arc-shaped rack (21); the center of the arc-shaped rack (21) coincides with the rotation point of the second trigger (2); the rear grip (6) is rotatably connected to a cam (22); the cam (22) and the arc-shaped rack (21) are connected via a gear; an eccentric rod (29) is fixedly connected to the outer surface of the first tube (8); the eccentric rod (29) is The axis is eccentrically arranged with respect to the axis of the first tube (8); the eccentric rod (29) is sleeved with a driving rod (28); the rear handle (6) is rotatably connected with a tilting rod (23); a roller (24) is mounted on one end of the tilting rod (23); the roller (24) abuts against the cam (22); the tilting rod (23) is provided with a first sliding groove (25); the driving rod (28) is slidably connected with the first sliding groove (25); and the rotation center of the tilting rod (23) is located between the roller (24) and the first sliding groove (25); The rear grip (6) is rotatably connected to a third trigger (3), the third trigger (3) is provided with a second slide groove (34), the drive rod (28) is provided with a third slide groove (26), the third slide groove (26) is slidably connected to a first block (27), the first block (27) is slidably connected to the second slide groove (34), the rear grip (6) is rotatably connected to a second limit rod (31), the second limit rod (31) is connected to the third trigger (3) via a one-way tooth, a third torsion spring (32) is provided between the second limit rod (31) and the rear grip (6), the third torsion spring (32) forces the second limit rod (31) to rotate in a certain direction.

2. The endoscope according to claim 1, characterized in that: The rear grip (6) is fixedly connected to a fixing block (15), the fixing block (15) penetrates the second trigger (2), the first trigger (1) is rotatably connected to the fixing block (15), the fixing block (15) is rotatably connected to a first lever (12), the fixing block (15) is rotatably connected to a connecting member (11), the connecting member (11) is rotatably connected to the first trigger (1) and the connecting member (11), a driving block (13) is provided at the end of the first lever (12), and the push rod (81) is fixedly connected to the driving block (13).

3. The endoscope according to claim 2, characterized in that: The rear grip (6) is rotatably connected to a first limiting rod (14), the first limiting rod (14) and the first shifting rod (12) are meshed via one-way teeth, a first torsion spring (16) is provided between the first shifting rod (12) and the rear grip (6), the first torsion spring (16) drives the first shifting rod (12) to rotate in one direction, a second torsion spring (17) is provided between the first limiting rod (14) and the mirror body (5), the second torsion spring (17) forces the first limiting rod (14) to rotate toward the first shifting rod (12).

4. The endoscope according to claim 3, characterized in that: A connecting rod (18) is slidably connected in the push rod (81), the connecting rod (18) passes through the driving block (13), and the connecting rod (18) is fixedly connected to the mirror body (5). A first channel (83) is provided in the push rod (81), a third channel (193) is provided in the mirror body (5), a second channel (192) communicating with the first channel (83) and the third channel (193) is provided in the connecting rod (18), the first channel (83) is communicated with the nozzle (7), a power chamber (9) communicating with the third channel (193) is provided in the mirror body (5), a piston (94) is provided in the power chamber (9), and the piston (94) is connected to the first trigger (1) via a plurality of connecting rods.

5. The endoscope according to claim 4, characterized in that: The spray head (7) is provided with an arc groove (71), the end of the push rod (81) is slidably connected to the arc groove (71), the connecting rod (18) is sleeved with a connecting block (19), the connecting block (19) is fixedly connected to the pull rod (82), a first spring (191) is provided between the connecting block (19) and the driving block (13), the first spring (191) forces the connecting block (19) to move toward the spray head (7), the rear handle (6) is rotatably connected to the fourth trigger (4), the fourth trigger (4) is slidably connected to the moving rod (42), the end of the moving rod (42) is rotatably connected to the driving block (13), the driving block (13) is slidably connected to the third limiting rod (41), and the third limiting rod (41) is unidirectionally toothed with the fourth trigger (4).

6. The endoscope according to claim 5, characterized in that: The second trigger (2) is connected to the rear grip (6) via an elastic sheet.

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