Endoscope

Abstract

The present application relates to an endoscope, through the first knob, the second knob, the first brake assembly and the second brake assembly, the control of the four direction bending of the snake bone can be stably realized, and the stability of operation is improved. In addition, in the structural layout, the second pull wire wheel penetrates the first pull wire wheel through the first perforation; at the same time, the first knob and the second knob are stacked outside the shell, and the first brake assembly is located between the first pull wire wheel and the shell, and the second brake assembly is arranged on the side of the second knob away from the first knob. The endoscope structure is more compact and reasonable, so that the operator can accurately and quickly distinguish the up-down bending and left-right bending of the snake bone during operation, so that the operation is more convenient, and the reliability of the operation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an endoscope. BACKGROUND

[0002] An endoscope is a detection instrument integrating traditional optics, human engineering, precision machinery, modern electronics, mathematics, software, etc., having an image sensor, an optical lens, an illumination light source, a mechanical device, etc. As an important auxiliary medical instrument for detecting lesions of internal organs of a human body, the endoscope is widely used in various surgical operations. At present, endoscope products are mostly reusable products, which need to be disinfected through a strict disinfection procedure after each use. A traditional endoscope includes a handle, an insertion tube, a snake bone, a tip head, and a main machine.

[0003] In order to expand the observation range, the snake bone is controlled to bend in four directions through a knob device to realize four-direction observation of the endoscope. However, the overall structure of the traditional endoscope is not reasonably arranged, and the operation is not convenient enough when controlling the bending of the snake bone and the braking of the knob device due to the design defects of the endoscope structure. SUMMARY

[0004] Therefore, it is necessary to provide an endoscope with a reasonable structure arrangement and convenient operation.

[0005] An endoscope comprises a shell, a first installation hole of the shell being provided for communication between the inside and outside of the shell; a knob device, the knob device comprising a first pull line wheel and a second pull line wheel rotatably arranged in the shell and a first knob and a second knob located outside the shell, the first pull line wheel extending out of the shell through the first installation hole, a first through hole being provided through the first pull line wheel, the second pull line wheel extending out of the shell through the first through hole, the first knob being sleeved on the first pull line wheel, and the second knob being sleeved on the second pull line wheel and stacked on the first knob; a braking device, the braking device comprising a first braking assembly and a second braking assembly, the first braking assembly being arranged between the first pull line wheel and the shell and being used for braking the first knob or the first pull line wheel, the second braking assembly being arranged on a side of the second knob away from the first knob and being used for braking the second knob or the second pull line wheel; and a snake bone, the snake bone being located outside the shell and being connected with the first pull line wheel and the second pull line wheel through a traction line respectively.

[0006] When the above-mentioned endoscope is in use, the first knob is rotated to drive the first wire pulley to rotate in the shell; after the first wire pulley rotates, the traction line pulls one side of the snake bone, causing it to bend in the up and down directions. In order to achieve a specific angle fixation, the first brake assembly brakes the first wire pulley or the first knob so that the traction line cannot be pulled, thereby keeping the snake bone bent at a specific angle. Similarly, the second knob is rotated to drive the second wire pulley to rotate in the shell; after the second wire pulley rotates, the traction line pulls one side of the snake bone, causing it to bend in the left and right directions. In order to achieve a specific angle fixation, the second brake assembly brakes the second wire pulley or the second knob so that the traction line cannot be pulled, thereby keeping the snake bone bent at a specific angle. In this way, through the first knob, the second knob, the first brake assembly and the second brake assembly, the bending of the snake bone in four directions can be stably controlled, thereby improving the stability of the operation. In addition, in terms of structural layout, the second wire pulling wheel passes through the first wire pulling wheel through the first through hole; at the same time, the first knob and the second knob are stacked outside the shell, and the first brake assembly is located between the first wire pulling wheel and the shell, and the second brake assembly is located on the side of the second knob facing away from the first knob. This arrangement makes the endoscope structure more compact and the arrangement more reasonable. During operation, it is convenient for the operator to accurately and quickly distinguish the upper and lower bending and left and right bending of the snake bone, making the operation more convenient and conducive to improving the reliability of the operation.

[0007] In one embodiment, the first brake assembly includes a first fixing frame, a first brake button and at least two first brake parts slidably mounted on the first fixing frame, the first fixing frame is positioned on the shell, the first brake button is sleeved on the outside of the first fixing frame, and when the first brake button rotates, it can push the first brake part to slide to clamp the first knob or the first wire pulling wheel.

[0008] In one embodiment, the first fixing frame is provided with a first working cavity for the first pulling wheel to pass through, the first knob extends into the first working cavity and is sleeved on the first pulling wheel, and when the first brake button rotates, it can push the first brake member to extend into the first working cavity and hold the first knob.

[0009] In one embodiment, the knob device further includes a first bracket disposed in the shell, a second through-hole is penetrated through the second wire pulling wheel, the first bracket passes through the second through-hole and extends out of the shell, and the second brake assembly is mounted on the first bracket.

[0010] In one of the embodiments, the second brake assembly comprises a second fixed frame, a second brake knob and at least two second brake members slidingly arranged on the second fixed frame, the second fixed frame is positioned on the first support, the second brake knob is sleeved outside the second fixed frame, when the second brake knob rotates, the second brake members are pushed to slide to tightly hold the second knob or the second pulley.

[0011] In one of the embodiments, a first fixing hole is arranged through the first support, a second fixing hole corresponding to the first fixing hole is arranged on the second brake knob, a fastener is inserted into the first fixing hole and the second fixing hole, so that the second brake knob is rotatably arranged on the first support.

[0012] In one of the embodiments, a brake ring is arranged on the second knob, a second working cavity for the brake ring to be inserted into is arranged on the second fixed frame, when the second brake knob rotates, the second brake members are pushed to extend into the second working cavity and tightly hold the brake ring.

[0013] In one of the embodiments, the endoscope further comprises an air-water valve and a tip head arranged on the snake bone, the air-water valve is embedded in the shell, a first plug-in part is arranged on the inner wall of the shell, a second plug-in part is arranged on the air-water valve and plug-in matched with the first plug-in part.

[0014] In one of the embodiments, the endoscope further comprises a negative pressure valve, the negative pressure valve is embedded in the shell, a third plug-in part is arranged on the inner wall of the shell, a fourth plug-in part is arranged on the negative pressure valve and plug-in matched with the third plug-in part.

[0015] In one of the embodiments, the endoscope further comprises a three-way valve, a fifth plug-in part is arranged on the inner wall of the shell, a sixth plug-in part is arranged on the three-way valve and plug-in matched with the fifth plug-in part, the three-way valve is provided with a first port, a second port and a third port in communication with each other, the first port is in communication with the negative pressure valve, the second port is used to communicate with an instrument channel valve, and the third port is used to communicate with an instrument channel of the tip head. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings, and their description, are not meant to limit the application to a single preferred embodiment.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic structural diagram of an endoscope according to an embodiment; Figure 2 A cross-sectional view of the internal structure of an endoscope according to an embodiment Figure 1 ; Figure 3 A cross-sectional view of the endoscope handle structure according to one embodiment Figure 2 ; Figure 4 for Figure 3 A magnified schematic diagram of the structure at the center circle A; Figure 5 is an exploded schematic diagram of an endoscope structure according to one embodiment; Figure 6 Schematic diagram of the structure of the first wire drawing wheel in one embodiment; Figure 7 Schematic diagram of the first knob structure in one embodiment Figure 1 ; Figure 8 Schematic diagram of the first knob structure in one embodiment Figure 2 ; Figure 9 A schematic diagram of the second bracket structure in one embodiment Figure 1 ; Figure 10 A schematic diagram of the second bracket structure in one embodiment Figure 2 ; Figure 11 A schematic diagram of the second wire pulling wheel structure in one embodiment Figure 1 ; Figure 12 A schematic diagram of the second wire pulling wheel structure in one embodiment Figure 2 ; Figure 13 Schematic diagram of the second knob structure in one embodiment Figure 1 ; Figure 14 Schematic diagram of the second knob structure in one embodiment Figure 2 ; Figure 15 An exploded perspective view of a first brake assembly structure according to one embodiment; Figure 16 An exploded view of the first brake assembly structure according to one embodiment from another perspective; Figure 17 is a schematic structural diagram of a first fixing frame according to an embodiment; Figure 18 is a schematic structural diagram of a first brake member according to an embodiment; Figure 19 An exploded perspective view of a second brake assembly structure according to one embodiment; Figure 20 An exploded view of the second brake assembly structure according to one embodiment from another perspective; Figure 21 is a schematic structural diagram of a second fixing frame according to an embodiment; Figure 22 is a schematic structural diagram of a second brake member according to an embodiment; Figure 23 is a schematic diagram of the first shell structure described in one embodiment; Figure 24 for Figure 23 A magnified schematic diagram of the structure at point B in the middle circle; Figure 25 for Figure 23 A magnified schematic diagram of the structure at point D in the middle circle; Figure 26 is a schematic diagram of the second shell structure described in one embodiment; Figure 27 for Figure 26 A magnified schematic diagram of the structure at point C in the middle circle; Figure 28 Schematic diagram of the structure of the gas-water valve according to one embodiment; Figure 29 is a cross-sectional view of the gas-water valve structure described in one embodiment; Figure 30 Schematic diagram of the negative pressure valve structure in one embodiment;

[0019] Figure 31 is a cross-sectional view of a negative pressure valve structure according to one embodiment; Figure 32 Schematic diagram of the three-way valve structure in one embodiment.

[0020] 100, housing; 110, accommodating cavity; 111, first mounting hole; 112, second mounting hole; 113, third mounting hole; 114, wire tube bracket 115, first opening; 116, second opening; 118, boss; 1181, first boss; 1182, second boss; 120, limiting column; 121, second positioning portion; 130, first housing; 131, second housing; 140, step portion; 150, first plug-in portion; 151, first slot; 1511, first type slot; 1512, second type slot; 152, first enclosure; 153, second enclosure; 160, wire entry hole; 161, first groove; 170, third plug-in portion; 171, second slot; 1711, third type slot; 1 712, fourth type slot; 172, third enclosure; 173, fourth enclosure; 180, fifth plug-in portion; 181, third slot; 1811, fifth type slot; 1812, sixth type slot; 182, second groove; 183, notch; 190, support plate; 191, first side plate; 192, second side plate; 200, knob device; 210, first pulley; 211, first through-hole; 212, first matching portion; 2121, first matching groove; 213, first buckle position; 2131, first clamping block; 2132, first alignment portion; 214, first winding portion; 215, first mounting portion; 216, third limiting portion; 217, second sealing ring; 220, second pulley; 221, second through-hole ; 222, second matching portion; 2221, second matching groove; 223, second buckle position; 2231, second clamping slot; 2232, third alignment portion; 224, second winding portion; 225, second mounting portion; 226, fourth limiting portion; 230, first knob; 231, third matching portion; 2311, first matching block; 232, third buckle position; 2321, first clamping slot; 2322, second alignment portion; 233, first protrusion; 234, first through hole; 240, second knob; 241, fourth matching portion; 2411, second matching block; 242, fourth buckle position; 2421, second clamping block; 2422, fourth alignment portion; 243, mounting groove; 244, second protrusion; 245, brake ring; 24 6. Second through hole; 250. Second bracket; 251. First limiting portion; 252. Second limiting portion; 253. First sealing ring; 260. First bracket; 261. Fourth positioning portion; 262. First fixing hole; 300. Braking device; 310. First brake assembly; 311. First fixing bracket; 3111. First working chamber; 3112. First chute; 31121. First slot section; 31122. Second slot section; 31123. Third slot section; 31124. Limiting wall; 3113. First positioning portion; 312. First brake member; 3121. Main body; 3122. Clamping portion; 3123. Transmission portion; 313. First brake button; 3131. First button body; 3132. First ring sleeve;3133, first push part; 3134, first toggle part; 3135, arc groove; 320, second brake assembly; 321, second fixing frame; 3211, second working chamber; 3212, second slide groove; 3213, third positioning part; 3214, second limit block; 322, second brake member; 323, second brake button; 3231, second button body; 3232, second ring; 3233, second push part; 3 234, second toggle portion; 3235, first limit block; 3236, second fixing hole; 400, air and water valve; 410, first valve body; 411, first flow channel; 412, air inlet; 413, air outlet; 414, liquid inlet; 415, liquid outlet; 416, second plug-in portion; 4161, first plug-in block; 417, raised portion; 420, first valve core; 421, first valve stem; 4211, channel; 422, first First isolator; 423, second isolator; 430, first valve cover; 440, first elastic member; 450, first valve sleeve; 500, negative pressure valve; 510, second valve body; 511, second flow channel; 512, inlet; 513, outlet; 514, main section; 515, first branch section; 516, second branch section; 517, fourth plug-in portion; 5171, second plug-in block; 520, second valve core; 521, third flow channel; 5 22, second port; 523, first port; 530, second valve cover; 540, second elastic member; 550, second valve sleeve; 600, three-way valve; 610, first tube; 611, first port; 612, third port; 620, second tube; 621, second port; 630, sixth plug-in portion; 631, third plug-in block; 700, fastener; 800, snake bone; 900, tip; 1000, instrument channel valve. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4An endoscope includes: a housing 100, a knob device 200, a brake device 300 and a snake bone 800. The housing 100 is provided with a first mounting hole 111 that connects the inside and outside of the housing 100. The knob device 200 includes a first wire pulley 210 and a second wire pulley 220 rotatably mounted in the housing 100, and a first knob 230 and a second knob 240 located outside the housing 100. The first wire pulley 210 extends out of the housing 100 through the first mounting hole 111, and the first wire pulley 210 is provided with a first through-hole 211. The second wire pulley 220 extends out of the housing 100 through the first through-hole 211, and the first knob 230 is sleeved on the first wire pulley 210. The second knob 240 is stacked on the first knob 230 and sleeved on the second wire pulley 220. The brake device 300 includes a first brake assembly 310 and a second brake assembly 320. The first brake assembly 310 is disposed between the first cable pulley 210 and the housing 100 and is used to brake the first knob 230 or the first cable pulley 210. The second brake assembly 320 is disposed on the side of the second knob 240 facing away from the first knob 230 and is used to brake the second knob 240 or the second cable pulley 220. The snake bone 800 is located outside the housing 100 and is connected to the first cable pulley 210 and the second cable pulley 220 respectively through a traction line.

[0023] When using the above-mentioned endoscope, the first knob 230 is rotated to drive the first pulley 210 to rotate within the housing 100; after the first pulley 210 rotates, the traction line pulls one side of the serpentine 800, causing it to bend in the vertical direction. To achieve a specific angle fixation, the first pulley 210 or the first knob 230 is braked by the first brake assembly 310, so that the traction line cannot be pulled, thereby maintaining the serpentine 800 in a bent state at a specific angle. Similarly, the second knob 240 is rotated to drive the second pulley 220 to rotate within the housing 100; after the second pulley 220 rotates, the traction line pulls one side of the serpentine 800, causing it to bend in the left and right directions. To achieve a specific angle fixation, the second pulley 220 or the second knob 240 is braked by the second brake assembly 320, so that the traction line cannot be pulled, thereby maintaining the serpentine 800 in a bent state at a specific angle. In this way, through the first knob 230, the second knob 240, the first brake assembly 310 and the second brake assembly 320, the bending of the snake bone 800 in four directions can be stably controlled, thereby improving the stability of the operation. In addition, in terms of structural layout, the second wire pulley 220 passes through the first wire pulley 210 through the first perforation 211; at the same time, the first knob 230 and the second knob 240 are stacked outside the shell 100, and the first brake assembly 310 is located between the first wire pulley 210 and the shell 100, and the second brake assembly 320 is located on the side of the second knob 240 facing away from the first knob 230. This arrangement makes the endoscope structure more compact and the arrangement more reasonable. In this way, during operation, it is convenient for the operator to accurately and quickly distinguish the up and down bending and left and right bending of the snake bone 800, making the operation more convenient and conducive to the reliability of the operation.

[0024] For further information, please refer to Figure 5 and Figure 15 The first brake assembly 310 includes a first fixed frame 311, a first brake button 313 and at least two first brake members 312 slidably mounted on the first fixed frame 311. The first fixed frame 311 is positioned on the housing 100, and the first brake button 313 is sleeved on the outside of the first fixed frame 311. When the first brake button 313 rotates, it can push the first brake member 312 to slide to hold the first knob 230 or the first wire pulley 210. It can be seen that when braking the first wire pulley 210, rotating the first brake button 313 to a preset angle drives at least two first brake members 312 to slide, so that they hold the first knob 230 or the first wire pulley 210, so that the first wire pulley 210 cannot rotate to continue to bend the snake bone 800.

[0025] It should be noted that the "preset angle" should be understood as: when the first pull line wheel 210 needs to be braked, the first brake knob 313 rotates a certain angle around the rotation axis clockwise or counterclockwise, and then the first brake knob 313 pushes the first brake piece 312 to move. The angle can be any angle value from 0° (not including 0°) to 360° (not including 360°).

[0026] Further, please refer to Figure 4 With Figure 15 , the first fixed frame 311 is provided with a first working cavity 3111. The first knob 230 extends into the first working cavity 3111 and is sleeved on the first pull line wheel 210. When the first brake knob 313 rotates, it can push the first brake piece 312 to extend into the first working cavity 3111 and tightly hold the first knob 230. In this way, the connection between the first knob 230 and the first pull line wheel 210 is realized through the first working cavity 3111.

[0027] In one embodiment, please refer to Figure 4 With Figure 15 , the first fixed frame 311 is provided with at least two first sliding grooves 3112 around the first working cavity 3111. Each first sliding groove 3112 is communicated with the first working cavity 3111 at one end and communicated to the outside of the first fixed frame 311 at the other end. Each first brake piece 312 is slidingly installed in each first sliding groove 3112 one by one, and the first brake piece 312 extends out of the first fixed frame 311 through the first sliding groove 3112. The inner wall of the first brake knob 313 is provided with at least two first pushing parts 3133, and when the first brake knob 313 rotates to the preset angle, each first pushing part 3133 one by one pushes each first brake piece 312 to move in the direction of the first working cavity 3111, so as to tightly hold the first knob 230.

[0028] It can be seen that the first brake members 312 are slidably arranged in the first slide groove 3112 one by one, and the first brake members 312 are ensured to extend out of the first fixing frame 311 through the first slide groove 3112. When the first brake button 313 sleeved on the outside of the first fixing frame 311 is rotated to a preset angle, the first pushing portion 3133 on its inner wall will contact the first brake member 312 and push the first brake member 312 to move in the first slide groove 3112. Since the first slide groove 3112 is connected to the first working chamber 3111, each first brake member 312 is pushed into the first working chamber 3111 by the first pushing portion 3133, and finally clamped on the first knob 230 to achieve braking of the first pulling wheel 210. In this way, through the matching structure between the first brake member 312 and the first brake button 313, the first brake member 312 is directly driven to move in the first slide groove 3112 during the braking process, so as to achieve the braking of the first wire pulling wheel 210. Its structural design is ingenious and simple, and the braking force is transmitted directly and effectively, ensuring a better braking effect of the knob.

[0029] For further information, please refer to Figure 4 and Figure 15 The first brake button 313 includes a first button body 3131 and a first collar 3132 mounted on the first button body 3131. The first collar 3132 is mounted outside the first fixing frame 311, and the first push portion 3133 is mounted on the inner wall of the first collar 3132. As a result, when the first collar 3132 is rotated outside the first fixing frame 311, the first push portion 3133 on its inner wall contacts the protruding portion of the first brake member 312, pushing the first brake member 312 to move.

[0030] Optionally, the connection method of the first pushing portion 3133 on the first ring sleeve 3132 may be, but is not limited to, bolt connection, threaded connection, clamping, welding, riveting, pin connection, integral molding, etc.

[0031] For further information, please refer to Figure 4 and Figure 15 The first pushing portion 3133 is formed by the inner wall of the first ring sleeve 3132 protruding toward the center of the first ring sleeve 3132, that is, the first pushing portion 3133 and the first ring sleeve 3132 are an integrated structure, which makes its production more convenient.

[0032] Specifically, please refer to Figure 15 There are three first pushers 3133, three first brake members 312, and three first slide grooves 3112. The three first slide grooves 3112 are spaced apart around the circumference of the first working chamber 3111. The three first pushers 3133 are spaced apart along the circumference of the first ring 3132.

[0033] In one embodiment, please refer to Figure 15The first brake button 313 is provided with a first toggle portion 3134. The first toggle portion 3134 extends along the radial protrusion of the first brake button 313, making it easier for the operator to rotate the first brake button 313 to improve the operability of the product.

[0034] In one embodiment, please refer to Figure 5 and Figure 16 The first fixing frame 311 is provided with a first positioning portion 3113. The first positioning portion 3113 cooperates with the second positioning portion 121 on the housing 100 to limit the first fixing frame 311 from rotating along with the first knob 230. Thus, the first positioning portion 3113 cooperates with the second positioning portion 121 to keep the first fixing frame 311 in a relatively fixed state, allowing the first brake member 312 to hold the first knob 230 tightly.

[0035] Optionally, the first positioning portion 3113 is a convex structure, and the second positioning portion 121 is a hole or groove structure; or, the first positioning portion 3113 is a hole or groove structure, and the second positioning portion 121 is a convex structure.

[0036] Specifically, please refer to Figure 5 and Figure 16 The first positioning portion 3113 is a positioning groove on the first fixing frame 311. The second positioning portion 121 is a positioning protrusion.

[0037] For further information, please refer to Figure 17 There are multiple first positioning portions 3113. The multiple first positioning portions 3113 are arranged at intervals around the first working chamber 3111. In this way, the multiple first positioning portions 3113 cooperate with the multiple second positioning portions 121 to better restrict the rotation of the first fixing frame 311.

[0038] In one embodiment, please refer to Figure 5 and Figure 16 The first brake button 313 is provided with an arcuate groove 3135. The arcuate groove 3135 is arranged around the first working chamber 3111 and is used to cooperate with the limiting post 120 on the housing 100 to limit the rotation range of the first brake button 313. In this way, the first arcuate groove 3135 effectively limits the rotation range of the first brake button 313, preventing excessive rotation from causing structural instability.

[0039] In one embodiment, please refer to Figure 4 、 Figure 6 and Figure 11, the knob device 200 further comprises a first support 260 arranged in the housing 100. The second pull wire wheel 220 is provided with a second through hole 221. The first support 260 passes through the second through hole 221 and extends out of the housing 100. The second brake assembly 320 is arranged on the first support 260. In this way, the second brake assembly 320 can stably brake the second knob 240 or the second pull wire wheel 220 through the first support 260.

[0040] Further, referring to Figure 5 and Figure 19 , the second brake assembly 320 comprises a second fixed frame 321, a second brake knob 323, and at least two second brake members 322 slidingly arranged on the second fixed frame 321. The second fixed frame 321 is positioned on the first support 260. The second brake knob 323 is sleeved outside the second fixed frame 321. When the second brake knob 323 rotates, it can push the second brake members 322 to slide to tightly hold the second knob 240 or the second pull wire wheel 220. Therefore, when braking the second pull wire wheel 220, rotating the second brake knob 323 by a preset angle drives the at least two second brake members 322 to slide and tightly hold the second knob 240 or the second pull wire wheel 220, so that the second pull wire wheel 220 cannot rotate to continue bending the serpentine 800.

[0041] It should be noted that the "preset angle" should be understood as: when the second pull wire wheel 220 needs to be braked, the second brake knob 323 rotates a certain angle around the rotation axis clockwise or counterclockwise, and then the second brake knob 323 pushes the second brake members 322 to move. The angle can be any angle value in the range of 0° (not including 0°) to 360° (not including 360°).

[0042] Further, referring to Figure 4 , the first support 260 is provided with a first fixed hole 262. The second brake knob 323 is provided with a second fixed hole 3236 corresponding to the first fixed hole 262. The first fixed hole 262 and the second fixed hole 3236 are penetrated by a fastener 700, so that the second brake knob 323 is rotatably arranged on the first support 260. In this way, through the fastener 700 and the first support 260, the second brake knob 323 can be stably installed on the first support 260, and the second brake knob 323 can also be rotated relative to the second fixed frame 321 to realize the braking of the second pull wire wheel 220.

[0043] It should be noted that when fixing the second brake knob 323, the fastener 700 does not need to lock the first support 260 and the second brake knob 323. On the premise that the second brake knob 323 cannot fall off the first support 260, the second brake knob 323 and the first support 260 also need to have a certain gap to enable rotation.

[0044] In one embodiment, please refer to Figure 4 and Figure 5 The second knob 240 is provided with a brake ring 245. The second fixing frame 321 is provided with a second working cavity 3211 for the brake ring 245 to pass through. When the second brake knob 323 rotates, it pushes the second brake member 322 into the second working cavity 3211 and securely engages the brake ring 245. Thus, by providing the brake ring 245 on the second knob 240, the second brake member 322 can stably engage the second knob 240, thereby achieving stable braking.

[0045] For further information, please refer to Figure 4 and Figure 13 The second knob 240 is provided with a mounting groove 243 on the side facing away from the first knob 230 for receiving the second brake button 323. The mounting groove 243 has a first protrusion 233 on its wall. The first protrusion 233 is arranged around the second wire pulley 220. The brake ring 245 is sleeved on the first protrusion 233. In this way, the brake ring 245 is stably installed, making it easier for the second brake assembly 320 to stably brake the rotation of the second knob 240, so that the bending angle of the snake bone 800 is fixed, thereby making it easier for the operator to observe images at a specific angle.

[0046] In one embodiment, please refer to Figure 5 and Figure 21 The second fixing frame 321 is provided with a third positioning portion 3213. The third positioning portion 3213 cooperates with the fourth positioning portion 261 on the first bracket 260 to restrict the second fixing frame 321 from rotating along with the second knob 240. Thus, the third positioning portion 3213 cooperates with the fourth positioning portion 261 to keep the second fixing frame 321 in a relatively fixed state, allowing the second brake member 322 to hold the second knob 240 tightly.

[0047] Optionally, the third positioning portion 3213 is a convex structure, and the fourth positioning portion 261 is a hole or groove structure; or, the third positioning portion 3213 is a hole or groove structure, and the fourth positioning portion 261 is a convex structure.

[0048] Specifically, please refer to Figure 5 and Figure 21 The third positioning portion 3213 is a positioning protrusion on the second fixing frame 321. The fourth positioning portion 261 is a positioning groove.

[0049] For further information, please refer to Figure 21 There are multiple third positioning portions 3213. The multiple third positioning portions 3213 are arranged at intervals around the second working chamber 3211. In this way, the multiple third positioning portions 3213 cooperate with the multiple fourth positioning portions 261 to better restrict the rotation of the second fixing frame 321.

[0050] In one embodiment, please refer to Figure 19 and Figure 20 At least two second slots 3212 are provided on the second fixing frame 321 at intervals around the second working chamber 3211. One end of each second slot 3212 is connected to the second working chamber 3211, and the other end is used to connect to the outside of the second fixing frame 321. Each second brake member 322 is slidably mounted in each second slot 3212, passing through the second slot 3212 and extending out of the second fixing frame 321. At least two second pushing portions 3233 are provided on the inner wall of the second brake button 323 at intervals. When the second brake button 323 is rotated to a preset angle, each second pushing portion 3233 pushes each second brake member 322 toward the second working chamber 3211 to clamp the second knob 240.

[0051] As can be seen, the second brake members 322 are slidably arranged in the second chute 3212 one by one, and the second brake members 322 are ensured to pass through the second chute 3212 and extend outside the second fixing frame 321. When the second brake button 323 sleeved on the outside of the second fixing frame 321 is rotated to a preset angle, the second pushing portion 3233 on its inner wall will contact the second brake member 322 and push the second brake member 322 to move in the second chute 3212. Since the second chute 3212 is connected to the second working chamber 3211, each second brake member 322 is pushed into the second working chamber 3211 by the second pushing portion 3233, and finally clamped on the second knob 240 to achieve braking of the second wire pulley 220. In this way, through the matching structure between the second brake member 322 and the second brake button 323, the second brake member 322 is directly driven to move in the second slide groove 3212 during the braking process, so as to achieve the braking of the second wire pulling wheel 220. Its structural design is ingenious and simple, and the braking force is transmitted directly and effectively, ensuring a better braking effect of the knob.

[0052] For further information, please refer to Figure 4 and Figure 19 The second brake button 323 includes a second button body 3231 and a second collar 3232 mounted on the second button body 3231. The second collar 3232 is mounted outside the second fixing frame 321, and the second push portion 3233 is mounted on the inner wall of the second collar 3232. As the second collar 3232 rotates outside the second fixing frame 321, the second push portion 3233 on its inner wall contacts the protruding portion of the second brake member 322, pushing the second brake member 322 to move.

[0053] Optionally, the second pushing portion 3233 may be connected to the second ring sleeve 3232 by, but is not limited to, bolt connection, threaded connection, clamping, welding, riveting, pin connection, integral molding, etc.

[0054] Further, please refer to Figure 19 The second pushing part 3233 is formed by the inner wall of the second ring 3232 protruding towards the center of the second ring 3232, that is, the second pushing part 3233 is an integral structure with the second ring 3232, so that it is more convenient to manufacture.

[0055] Specifically, the second pushing part 3233, the second brake 322 and the second sliding groove 3212 are all three. The three second sliding grooves 3212 are arranged at intervals around the circumference of the second working cavity 3211. The three second pushing parts 3233 are arranged at intervals along the circumference of the second ring 3232.

[0056] In an embodiment, please refer to Figure 20 The second driving part 3234 is arranged on the second brake knob 323. The second driving part 3234 extends along the radial direction of the second brake knob 323, so as to facilitate the rotation of the second brake knob 323 by the operator, thereby improving the operability of the product.

[0057] In an embodiment, please refer to Figure 19 and Figure 20 The inner wall of the second brake knob 323 is provided with a first limiting block 3235, and the outer wall of the second fixed frame 321 is provided with a second limiting block 3214. The first limiting block 3235 cooperates with the second limiting block 3214 to limit the rotation range of the second brake knob 323.

[0058] In an embodiment, please refer to Figure 17 The first sliding groove 3112 and the second sliding groove 3212 each include a first groove section 31121, a second groove section 31122 and a third groove section 31123 which are sequentially communicated. The first groove section 31121 is communicated with the first working cavity 3111 or the second working cavity 3211. The third groove section 31123 is used to communicate to the outside of the first fixed frame 311 or the second fixed frame 321. The first brake 312 or the second brake 322 is slidingly arranged in the second groove section 31122, and one end of the first brake 312 or the second brake 322 extends into the first groove section 31121, and the other end extends out of the corresponding fixed frame through the third groove section 31123. In this embodiment, the first sliding groove 3112 and the second sliding groove 3212 are designed as a three-section structure. Before braking, one end of the first brake 312 or the second brake 322 extends out of the corresponding fixed frame through the third groove section 31123. When braking, the first brake 312 or the second brake 322 is pushed, so that the other end thereof extends into the first working cavity 3111 or the second working cavity 3211 through the first groove section 31121, so as to tightly hold the first knob 230 or the second knob 240.

[0059] Further, please refer to Figure 18 and Figure 22Each of the first and second brake members 312 and 322 includes a main body 3121, a gripping portion 3122, and a transmission portion 3123, respectively disposed at opposite ends of the main body 3121. The gripping portion 3122 is located within the first slot section 31121. The transmission portion 3123 is located within the third slot section 31123 and partially extends outside the first or second fixing frame 3111 or 321. Limiting walls 31124 are defined between the first and second slot sections 31121 and 31122, and between the second and third slot sections 31122 and 31123, respectively. The main body 3121 is slidably mounted within the second slot section 31122 and engages with the limiting walls 31124 between the first and second slot sections 31121 and 31122, and between the second and third slot sections 31122 and 31123, respectively. During the limited engagement, when the main body 3121 engages with the limiting wall 31124 adjacent to the third slot section 31123, the transmission portion 3123 partially passes through the third slot section 31123 and extends out of the fixed frame. When the main body 3121 engages with the limiting wall 31124 adjacent to the first slot section 31121, the gripping portion 3122 passes through the first slot section 31121 and extends into the working chamber. In this way, the limiting walls 31124 between the first slot section 31121 and the second slot section 31122, and between the second slot section 31122 and the third slot section 31123, limit the movement of the main body 3121 within the second slot section 31122. While achieving effective braking, this prevents the first brake member 312 or the second brake member 322 from slipping out and causing the braking device 300 to fail.

[0060] Optionally, the connection methods of the holding portion 3122 and the transmission portion 3123 on the main body 3121 can be, but are not limited to, bolt connection, threaded connection, clamping, welding, riveting, pin connection, integrated molding, etc. Among them, the integrated molding method should be understood as: injection molding, extrusion molding, die casting, etc.

[0061] Specifically, please refer to Figure 18 and Figure 22 The transmission part 3123, the main body 3121 and the holding part 3122 are an integrated structure, which is not only conducive to simplifying the manufacturing process, but also conducive to ensuring the structural stability of the first brake member 312 or the second brake member 322.

[0062] Of course, when the first brake member 312 and the second brake member 322 are both integral structures, there are many options for their outer shape design, such as a mountain shape, etc. This embodiment does not make any specific limitation on this.

[0063] In one embodiment, please refer to Figure 17The width W1 of the first slot section 31121 and the width W3 of the third slot section 31123 are both smaller than the width W2 of the second slot section 31122, thereby forming limiting walls 31124 between the first slot section 31121 and the third slot section 31123, respectively, and the second slot section 31122. The width W4 of the clasping portion 3122 and the width W6 of the transmission portion 3123 are both smaller than the width W5 of the main body 3121. Therefore, during braking, the width difference between the second slot section 31122 and the first and third slot sections 31121 and 31123 is utilized to form limiting walls 31124 on both sides, stably restricting the main body 3121 from moving back and forth within the second slot section 31122 and ensuring a more stable braking structure.

[0064] It should be noted that the first slot section 31121 is located in the middle of the second slot section 31122, and the width difference between the first slot section 31121 and the second slot section 31122 can be used to form two limiting walls 31124. Of course, if the first slot section 31121 is not located in the middle of the second slot section 31122, a single limiting wall 31124 can also be formed. Similarly, the third slot section 31123 is located in the middle of the second slot section 31122, and the width difference between the third slot section 31123 and the second slot section 31122 can be used to form two limiting walls 31124. Of course, if the third slot section 31123 is not located in the middle of the second slot section 31122, a single limiting wall 31124 can also be formed.

[0065] In one embodiment, please refer to Figure 4 、 Figure 6 and Figure 7 The first pulling wheel 210 is provided with a first matching portion 212 and a first buckle 213. The first matching portion 212 and the first buckle 213 are both located outside the housing 100. The second pulling wheel 220 is provided with a second matching portion 222 and a second buckle 223. The second matching portion 222 and the second buckle 223 are both located outside the housing 100. The first knob 230 is provided with a third matching portion 231 and a third buckle 232 that snaps into engagement with the first buckle 213. The third matching portion 231 cooperates with the first matching portion 212 so that the first knob 230 can drive the first pulling wheel 210 to rotate. The second knob 240 is provided with a fourth matching portion 241 and a fourth buckle 242 that snaps into engagement with the second buckle 223. The fourth matching portion 241 cooperates with the second matching portion 222 so that the second knob 240 can drive the second pulling wheel 220 to rotate.

[0066] During the assembly process, the first cable pulley 210 is rotated and installed in the housing 100 so that it extends out of the housing 100. Then, the first knob 230 is placed on the portion of the first cable pulley 210 that extends out of the housing 100, and the first matching portion 212 is matched with the third matching portion 231, and the first buckle 213 is snap-fitted with the third buckle 232, so that the first cable pulley 210 and the first knob 230 are reliably connected, ensuring that the first cable pulley 210 is stably installed in the housing 100. At the same time, under the action of the first matching portion 212 and the third matching portion 231, the first knob 230 can drive the first cable pulley 210 to rotate, so as to stably control the bending of the snake bone 800. Similarly, the second wire pulley 220 is rotated and arranged in the housing 100 so that it passes through the first through-hole 211 and extends out of the housing 100; then, the second knob 240 is sleeved on the portion of the second wire pulley 220 extending out of the housing 100, and the second matching portion 222 is matched with the fourth matching portion 241, and the second buckle 223 is snap-fitted with the fourth buckle 242, so that the second wire pulley 220 and the second knob 240 are reliably connected, ensuring that the second wire pulley 220 is stably installed in the housing 100. At the same time, under the action of the second matching portion 222 and the fourth matching portion 241, the second knob 240 can drive the second wire pulley 220 to rotate so as to stably control the bending of the snake bone 800. The overall structural design is ingenious, and the first knob 230 and the second knob 240 only need to be inserted to complete their respective installations, which makes the product assembly convenient, helps to improve assembly efficiency, and thus effectively reduces production costs.

[0067] It should be noted that the first mating portion 212 and the third mating portion 231 can limit the relative rotation between the first cable pulley 210 and the first knob 230, so that the first knob 230 can drive the first cable pulley 210 to rotate together. The structures of the first mating portion 212 and the third mating portion 231 can be designed in various ways, for example: the first mating portion 212 is a convex structure, and the second mating portion 222 is a groove or hole structure; or the first mating portion 212 is a groove or hole structure, and the second mating portion 222 is a convex structure, etc.

[0068] Similarly, the second mating portion 222 and the fourth mating portion 241 can limit the relative rotation between the second cable pulley 220 and the second knob 240, so that the second knob 240 can drive the second cable pulley 220 to rotate together. The structures of the second mating portion 222 and the fourth mating portion 241 can be designed in various ways, for example: the second mating portion 222 is a convex structure, and the fourth mating portion 241 is a groove or hole structure; or the second mating portion 222 is a groove or hole structure, and the fourth mating portion 241 is a convex structure, etc.

[0069] It should also be noted that when the first buckle position 213 cooperates with the third buckle position 232, it can limit the movement of the first cable pulley 210, preventing the first cable pulley 210 from falling off from the mounting hole of the housing 100, thereby ensuring that the first cable pulley 210 is stably installed in the housing 100. At the same time, when the second buckle position 223 cooperates with the fourth buckle position 242, it can limit the movement of the second cable pulley 220, preventing the second cable pulley 220 from falling off from the mounting hole of the housing 100, thereby ensuring that the second cable pulley 220 is stably installed in the housing 100.

[0070] For further information, please refer to Figure 4 and Figure 9 The knob device 200 also includes a second bracket 250 installed in the housing 100. The second bracket 250 is sleeved on the second wire pulling wheel 220 and covers the first wire pulling wheel 210. In this way, the first wire pulling wheel 210 is stably installed in the housing 100 through the second bracket 250. At the same time, the second bracket 250 can also provide protection for the first wire pulling wheel 210, so that the traction line can be stably wound on the first wire pulling wheel 210.

[0071] Optionally, the connection between the second bracket 250 and the housing 100 may be, but is not limited to, bolt connection, clamping, riveting, welding, bonding, etc.

[0072] For further information, please refer to Figure 4 The knob device 200 further includes a first sealing ring 253. The first sealing ring 253 is provided between the second bracket 250 and the second cable pulley 220 to improve the sealing between the second bracket 250 and the second cable pulley 220, thereby preventing liquid from seeping in from between the second bracket 250 and the second cable pulley 220 and causing corrosion damage to the first cable pulley 210.

[0073] Of course, please refer to Figure 4 The knob device 200 further includes a second sealing ring 217. The second sealing ring 217 is provided between the first pulling wheel 210 and the housing 100 to further improve the sealing performance of the knob device 200 and effectively prevent liquid from penetrating from the outside of the housing 100 through the mounting hole to the first pulling wheel 210.

[0074] In one embodiment, please refer to Figure 6 、 Figure 9 、 Figure 10 and Figure 12The second support 250 is respectively provided with a first limiting part 251 and a second limiting part 252. The first pull line wheel 210 is provided with a third limiting part 216. The third limiting part 216 cooperates with the first limiting part 251 to limit the rotation angle of the first pull line wheel 210. The second pull line wheel 220 is provided with a fourth limiting part 226. The fourth limiting part 226 cooperates with the second limiting part 252 to limit the rotation angle of the second pull line wheel 220. Therefore, when the first knob 230 drives the first pull line wheel 210 to rotate to a preset angle, the third limiting part 216 cooperates with the first limiting part 251 to limit the continuous rotation of the first pull line wheel 210, thereby avoiding the over-rotation of the first pull line wheel 210 to cause the traction line to break, and further ensuring the safety of the use of the endoscope. Similarly, when the second knob 240 drives the second pull line wheel 220 to rotate to a preset angle, the fourth limiting part 226 cooperates with the second limiting part 252 to limit the continuous rotation of the second pull line wheel 220, thereby avoiding the over-rotation of the second pull line wheel 220 to cause the traction line to break, and further ensuring the safety of the use of the endoscope.

[0075] It should be noted that the first limiting part 251, the second limiting part 252, the third limiting part 216 and the fourth limiting part 226 are all in a protruding structure. The rotation range of the first pull line wheel 210 and the second pull line wheel 220 is effectively controlled by the interference between the protruding structures.

[0076] Further, please refer to Figure 6 and Figure 7 The first buckle 213 and the third buckle 232 are both at least two. The at least two first buckles 213 are arranged along the circumference of the first pull line wheel 210. The at least two third buckles 232 are arranged one by one corresponding to the at least two first buckles 213. In this way, the first pull line wheel 210 and the first knob 230 are effectively buckled by the one-to-one cooperation of each first buckle 213 and each third buckle 232, so that the connection between the first pull line wheel 210 and the first knob 230 is more reliable and stable.

[0077] In one embodiment, please refer to Figure 6 and Figure 7 The first buckle 213 is a first clamping block 2131. The third buckle 232 is a first clamping groove 2321 matched with the first clamping block 2131. In this way, the first pull line wheel 210 and the first knob 230 are stably combined by the cooperation of the first clamping block 2131 and the first clamping groove 2321.

[0078] In addition, since a first alignment portion 2132 is provided on one of the first blocking blocks 2131, and a second alignment portion 2322 that cooperates with the first alignment portion 2132 is provided on the groove wall of one of the first slots 2321, when snapping, it is only necessary to align the first alignment portion 2132 with the second alignment portion 2322 to stably snap the first knob 230 onto the first wire pulley 210, making the assembly of the knob device 200 more convenient, thereby helping to improve the assembly efficiency of the endoscope.

[0079] It should be noted that the first alignment portion 2132 and the second alignment portion 2322 have various forms, for example: the first alignment portion 2132 is designed as a protrusion, and the second alignment portion 2322 is designed as a groove; or, the first alignment portion 2132 and the second alignment portion 2322 are both designed as corresponding patterns, logos, etc.

[0080] Specifically, the first alignment portion 2132 is a groove, and the second alignment portion 2322 is a protrusion.

[0081] For further information, please refer to Figure 11 and Figure 13 , there are at least two second buckle positions 223 and at least two fourth buckle positions 242. At least two second buckle positions 223 are arranged at intervals along the circumference of the second cable pulley 220. At least two fourth buckle positions 242 are arranged in a one-to-one correspondence with at least two second buckle positions 223. In this way, through the one-to-one coordination of each second buckle position 223 and each fourth buckle position 242, the second cable pulley 220 and the second knob 240 are effectively buckled, thereby making the connection between the second cable pulley 220 and the second knob 240 more reliable and stable.

[0082] In one embodiment, please refer to Figure 11 and Figure 13 The second buckle position 223 is a second slot 2231, and the fourth buckle position 242 is a second block 2421 adapted to the second slot 2231. In this way, the second pulley 220 and the second knob 240 are stably combined by the second block 2421 cooperating with the second slot 2231.

[0083] In addition, since a third alignment portion 2232 is provided on the groove wall of one of the second slots 2231, and a fourth alignment portion 2422 that cooperates with the third alignment portion 2232 is provided on one of the second blocks 2421, when snapping, it is only necessary to align the third alignment portion 2232 with the fourth alignment portion 2422 to stably snap the second knob 240 onto the second wire pulley 220, making the assembly of the knob device 200 more convenient, thereby helping to improve the assembly efficiency of the endoscope.

[0084] It should be noted that the third alignment portion 2232 and the fourth alignment portion 2422 have various forms, for example: the third alignment portion 2232 is designed as a groove, and the fourth alignment portion 2422 is designed as a protrusion; or, the third alignment portion 2232 and the fourth alignment portion 2422 are both designed as corresponding patterns, logos, etc.

[0085] Specifically, the third alignment portion 2232 is a protrusion, and the fourth alignment portion 2422 is a groove.

[0086] For further information, please refer to Figure 6 and Figure 8 , there are at least two first matching parts 212 and third matching parts 231. At least two first matching parts 212 are arranged at intervals along the circumference of the first wire pulling wheel 210. At least two third matching parts 231 are arranged in a one-to-one correspondence with at least two first matching parts 212. In this way, through the one-to-one matching of each first matching part 212 and each third matching part 231, the first wire pulling wheel 210 and the first knob 230 are effectively matched, so that the first knob 230 can drive the first wire pulling wheel 210 to rotate more reliably and stably.

[0087] In one embodiment, please refer to Figure 6 and Figure 8 , the first matching portion 212 is a first matching groove 2121. The third matching portion 231 is a first matching block 2311 adapted to the first matching groove 2121. The first matching groove 2121 is arranged along the axial extension of the first wire drawing wheel 210. In this way, the first matching block 2311 is inserted into the first matching groove 2121, so that the first wire drawing wheel 210 cannot rotate relative to the first knob 230, so that the first knob 230 can drive the first wire drawing wheel 210 to rotate together.

[0088] Specifically, please refer to Figure 6 and Figure 8 The first matching groove 2121 is extended from one end of the first pulling wheel 210 along the axial direction of the first pulling wheel 210. In this way, the first matching block 2311 can be more conveniently inserted into the first matching groove 2121, thereby making the combination between the first pulling wheel 210 and the first knob 230 more convenient.

[0089] For further information, please refer to Figure 11 and Figure 14, there are at least two second matching parts 222 and at least two fourth matching parts 241. At least two second matching parts 222 are arranged at intervals along the circumference of the second wire pulling wheel 220. At least two second matching parts 222 are arranged in a one-to-one correspondence with at least two fourth matching parts 241. In this way, through the one-to-one matching of each second matching part 222 and each fourth matching part 241, the second wire pulling wheel 220 and the second knob 240 are effectively engaged, so that the second knob 240 drives the second wire pulling wheel 220 to rotate more reliably and stably.

[0090] In one embodiment, please refer to Figure 11 and Figure 14 , the second matching portion 222 is a second matching groove 2221. The fourth matching portion 241 is a second matching block 2411 adapted to the second matching groove 2221. The second matching groove 2221 is extended along the axial direction of the second wire pulling wheel 220. In this way, the second matching block 2411 is inserted into the second matching groove 2221, so that the second wire pulling wheel 220 cannot rotate relative to the second knob 240, so that the second knob 240 can drive the second wire pulling wheel 220 to rotate together.

[0091] Specifically, please refer to Figure 11 and Figure 14 The second matching groove 2221 is extended from one end of the second pulling wheel 220 along the axial direction of the second pulling wheel 220. In this way, the second matching block 2411 can be more conveniently inserted into the second matching groove 2221, thereby making the combination between the second pulling wheel 220 and the second knob 240 more convenient.

[0092] In one embodiment, please refer to Figure 6 、 Figure 7 and Figure 8 , a first through hole 234 is provided on the first knob 230 for the first wire pulling wheel 210 to pass through. At least two third matching parts 231 are spaced apart around the first through hole 234. At least two third buckle positions 232 are spaced apart around the first through hole 234. When the first wire pulling wheel 210 passes through the first through hole 234, the first matching part 212 is matched with the third matching part 231, and the first buckle position 213 is buckled on the third buckle position 232. In this way, during assembly, it is only necessary to pass the first wire pulling wheel 210 through the first through hole 234 to achieve stable clamping between the second wire pulling wheel 220 and the second knob 240.

[0093] In one embodiment, please refer to Figure 5 and Figure 8A first protrusion 233 is provided on the side of the first knob 230 facing the housing 100. The first protrusion 233 is positioned around the first through-hole 234 and is configured to engage with the first brake assembly 310. This stabilizes the rotation of the first knob 230 through the first brake assembly 310, maintaining a fixed bending angle of the snake bone 800 and allowing the operator to observe images at a specific angle.

[0094] In one embodiment, please refer to Figure 4 、 Figure 13 and Figure 14 , a second through hole 246 is provided on the second knob 240 for the second cable pulley 220 to pass through. At least two fourth matching parts 241 are spaced apart around the second through hole 246. At least two fourth buckle positions 242 are spaced apart around the second through hole 246. When the second cable pulley 220 passes through the second through hole 246, the second matching part 222 is matched with the fourth matching part 241, and the second buckle position 223 is buckled on the fourth buckle position 242. In this way, during assembly, it is only necessary to pass the second cable pulley 220 through the second through hole 246 to achieve stable clamping between the second cable pulley 220 and the second knob 240.

[0095] In one embodiment, please refer to Figure 6 The first wire pulling wheel 210 includes a first winding portion 214 and a first mounting portion 215 provided on the first winding portion 214. The first through hole 211 passes through the first winding portion 214 and the first mounting portion 215. The first winding portion 214 is located inside the housing 100. The first mounting portion 215 is passed through the mounting hole. The first matching portion 212 and the first buckle position 213 are both provided on the first mounting portion 215. In this way, the first wire pulling wheel 210 can be more stably installed in the housing 100.

[0096] In one embodiment, please refer to Figure 11 and Figure 12 The second cable pulley 220 includes a second winding portion 224 and a second mounting portion 225 disposed on the second winding portion 224. The second winding portion 224 is located within the housing 100, the second mounting portion 225 is passed through the first through-hole 211, and the second mating portion 222 and the second buckle 223 are both disposed on the second mounting portion 225. In this manner, the second cable pulley 220 can be more stably mounted within the housing 100.

[0097] In one embodiment, please refer to Figure 1 、 Figure 23 and Figure 28The endoscope further comprises an air-water valve 400 and a tip head 900 arranged on the snake bone 800. The air-water valve 400 is embedded in the shell 100. The inner wall of the shell 100 is provided with a first plug-in part 150. The air-water valve 400 is provided with a second plug-in part 416 which is plug-in matched with the first plug-in part 150. Therefore, during the installation of the air-water valve 400, the air-water valve 400 is embedded in the shell 100, and the second plug-in part 416 is plug-in matched with the first plug-in part 150, so that the air-water valve 400 can be effectively fixed to complete the installation of the air-water valve 400 on the shell 100. Since the air-water valve 400 is fixed on the shell 100 by plug-in, a large number of bolts or screws and other parts are not required during installation, thereby effectively simplifying the installation operation and improving the assembly efficiency of the endoscope.

[0098] It should be noted that, please refer to Figure 29 The air-water valve 400 comprises a first valve body 410 and a first valve core 420. The shell 100 is provided with a second mounting hole 112, and has a containing cavity 110 which is in communication with the second mounting hole 112. The first valve body 410 is arranged in the second mounting hole 112 and extends into the containing cavity 110. The first valve body 410 is provided with a second plug-in part 416 which is plug-in matched with the first plug-in part 150. The first valve body 410 is provided with a first flow channel 411. The first valve body 410 is provided with a gas inlet 412, a gas outlet 413, a liquid inlet 414 and a liquid outlet 415 which are in communication with the first flow channel 411. The first valve core 420 is movably sleeved in the first valve body 410 and arranged in the first flow channel 411. The gas inlet 412 and the gas outlet 413 are communicated or the liquid inlet 414 and the liquid outlet 415 are communicated by driving the first valve core 420. When the air-water valve 400 is installed, the gas inlet 412 and the gas outlet 413 or the liquid inlet 414 and the liquid outlet 415 are selectively communicated by driving the first valve core 420 in the first valve body 410, so that the air-water valve 400 can deliver liquid or gas to the inside of the organ to clean the camera. Therefore, the gas-liquid switching operation is greatly facilitated, and the stable operation of the surgery is ensured.

[0099] It should be noted that the structure of the first valve core 420 is not limited in the embodiment, and only needs to meet the requirement of selectively controlling the communication between the gas inlet 412 and the gas outlet 413 or the communication between the liquid inlet 414 and the liquid outlet 415.

[0100] Optionally, the first plug-in part 150 can be a convex structure, and the second plug-in part 416 can be a groove or hole structure; or the first plug-in part 150 can be a groove or hole structure, and the second plug-in part 416 can be a convex structure.

[0101] Specifically, please refer to Figure 24 and Figure 28The first plug-in portion 150 is a first slot 151. The second plug-in portion 416 is a first plug-in block 4161 that cooperates with the first slot 151. Thus, the first plug-in block 4161 cooperates with the first slot 151, making it easier to fix the gas and water valve 400.

[0102] In one embodiment, please refer to Figure 28 The first plug-in block 4161 is arranged on the first valve body 410 and extends along the circumference of the first valve body 410. In this way, the first plug-in block 4161 is conveniently inserted into the first slot 151 in different directions, thereby ensuring that the installation of the gas and water valve 400 is more stable and secure.

[0103] It should be noted that the quantity configuration relationship between the first slots 151 and the first plug-in blocks 4161 can be one-to-one, two-to-one, or multiple-to-one, that is, the same first plug-in block 4161 is simultaneously plugged into two or more first slots 151.

[0104] In one embodiment, please refer to Figure 23 and Figure 26 The shell 100 includes a first shell 130 and a second shell 131. The first shell 130 is covered on the second shell 131, and a receiving cavity 110 is formed between the first shell 130 and the second shell 131. The first slot 151 includes a first type slot 1511 and a second type slot 1512. The first type slot 1511 is opened on the first shell 130. The second type slot 1512 is opened on the second shell 131. One end of the first plug-in block 4161 is plugged into and matched with the first type slot 1511. The other end of the first plug-in block 4161 is plugged into and matched with the second type slot 1512. It can be seen that when the first shell 130 is matched with the second shell 131, the opposite ends of the first plug-in block 4161 are plugged into the first type slot 1511 and the second type slot 1512, so that the gas and water valve 400 is effectively fixed at the top and bottom.

[0105] Optionally, the cooperation manner between the first shell 130 and the second shell 131 may be, but is not limited to, bolt connection, clamping connection, pin connection, etc.

[0106] In one embodiment, please refer to Figure 24 A first enclosure 152 and a second enclosure 153 are spaced apart on the wall of the accommodating chamber 110. The first enclosure 152 and the second enclosure 153 are located on opposite sides of the second mounting hole 112, and together they form a first slot 151. As can be seen, in this embodiment, the first slot 151 and the second mounting hole 112 are positioned directly opposite each other. When the first valve body 410 is inserted into the second mounting hole 112, the first insert 4161 thereon can be precisely inserted into the first slot 151, making installation of the air / water valve 400 more convenient.

[0107] Optionally, the mounting manner of the first and second surrounding plates 152 and 153 on the shell 100 can be, but is not limited to, bolt connection, clamping, welding, riveting, pin connection, bonding, one-piece forming, etc. Among them, the one-piece forming can be injection molding, 3D printing, etc.

[0108] In one embodiment, referring to Figure 24 With Figure 28 , the shell 100 is provided with a stepped portion 140 on the side away from the accommodating cavity 110. The stepped portion 140 is arranged around the second mounting hole 112. The first valve body 410 is provided with a protruding portion 417 in the circumferential direction. The protruding portion 417 is in abutting cooperation with the stepped portion 140, which realizes effective limiting of the air-water valve 400 in the second mounting hole 112, so that the air-water valve 400 is stably mounted on the shell 100.

[0109] Specifically, referring to Figure 24 , the protruding portion 417 and the first plug block 4161 are arranged in parallel and spaced apart on the first valve body 410. In this way, during installation, the protruding portion 417 and the first plug block 4161 act on the outer side and the inner side of the shell 100, respectively, to form an inner-outer limiting structure, which effectively avoids the air-water valve 400 from shaking up and down in the second mounting hole 112, so that the air-water valve 400 is more stable on the shell 100.

[0110] In one embodiment, referring to Figure 29The first valve core 420 includes a valve stem and a first isolating member 422 and a second isolating member 423 spaced apart on the valve stem. The valve stem is movably sleeved in the first valve body 410 and penetrates the first flow channel 411. The first isolating member 422 and the second isolating member 423 are both sealed with the inner wall of the first flow channel 411. When the valve stem moves to the first position, the first isolating member 422 is located between the liquid inlet 414 and the liquid outlet 415, blocking the communication between the liquid inlet 414 and the liquid outlet 415. The liquid inlet 414 and the liquid outlet 415 are both located on one side of the second isolating member 423, and the air inlet 412 and the air outlet 413 are both located on the other side of the second isolating member 423. The purpose is to: 1. block the passage between gas and liquid through the second isolator 423 to prevent gas-liquid cross-flow; 2. locate the air inlet 412 and the air outlet 413 on the same side of the second isolator 423, thereby maintaining communication between the air inlet 412 and the air outlet 413, thereby allowing gas to enter the organ and blow air to the camera. In addition, when the valve stem moves to the second position, the second isolator 423 is located between the air inlet 412 and the air outlet 413, blocking the communication between the air inlet 412 and the air outlet 413. The liquid inlet 414 and the liquid outlet 415 are both located on one side of the first isolator 422, and the liquid inlet 414 and the liquid outlet 415 are both located on the other side of the first isolator 422. The purpose is: 1. To block the passage between gas and liquid by the first isolating member 422 to avoid cross-flow of gas and liquid; 2. The liquid inlet 414 and the liquid outlet 415 are located on the same side of the first isolating member 422, so that the liquid inlet 414 and the liquid outlet 415 remain connected, thereby allowing liquid to enter the organ to flush the camera.

[0111] It should be noted that the positional relationship between the air inlet 412 and the air outlet 413 on the first valve body 410 is not limited. For example, the air inlet 412 can be above the air outlet 413, or below the liquid outlet 415. Similarly, the positional relationship between the liquid inlet 414 and the liquid outlet 415 on the first valve body 410 is not limited. For example, the liquid inlet 414 can be above the liquid outlet 415, or below the liquid outlet 415.

[0112] Specifically, please refer to Figure 29 The liquid outlet 415, the liquid inlet 414, the air inlet 412 and the air outlet 413 are arranged in sequence from top to bottom along the length direction of the first valve body 410. Figure 29 For example, the length direction of the first valve body 410 is Figure 29 The direction indicated by any arrow in S.

[0113] In one embodiment, please refer to Figure 28The gas-water valve 400 further comprises a first valve cover 430 and a first elastic member 440. The first valve cover 430 is arranged on the valve rod. The first elastic member 440 is connected between the first valve cover 430 and the first valve body 410, and is used to drive the valve rod to return from the second position to the first position, so that the gas-water valve 400 returns to the initial state, and is ready for the next operation. In addition, the gas-water valve 400 further comprises a first valve sleeve 450, which is sleeved on the valve rod and connected with the first valve body 410.

[0114] Optionally, the first elastic member 440 can be a spring, elastic rubber, elastic metal sheet or the like.

[0115] In an embodiment, referring to Figure 29 The valve rod is provided with a channel 4211. One end of the channel 4211 is in communication with the gas outlet 413, and the other end is used to communicate with the outside. In this way, the valve rod can only enter the gas-liquid switching state when one end of the channel 4211 is blocked (for example, by using a finger to block one end of the channel 4211).

[0116] In an embodiment, referring to Figure 23 and Figure 30 The endoscope further comprises a negative pressure valve 500. The negative pressure valve 500 is embedded in the shell 100. The inner wall of the shell 100 is provided with a third insertion part 170. The negative pressure valve 500 is provided with a fourth insertion part 517 which is inserted and matched with the third insertion part 170. Because the third insertion part 170 is arranged in the shell 100, and the fourth insertion part 517 is arranged on the negative pressure valve 500, when fixed, the fourth insertion part 517 can be inserted on the third insertion part 170, so that the negative pressure valve 500 is stably and quickly positioned on the shell 100. Compared with the traditional screw or bolt fixing mode, the installation structure is greatly simplified, the installation of the negative pressure valve 500 is more rapid and simple, and the assembly efficiency of the endoscope is improved.

[0117] Further, referring to Figure 31 The negative pressure valve 500 comprises a second valve body 510 and a second valve core 520. The shell 100 is provided with a third mounting hole 113, and has a containing cavity 110 which is in communication with the second mounting hole 112. The second valve body 510 is arranged in the third mounting hole 113 and extends into the containing cavity 110. The second valve body 510 is provided with a second insertion part 416 which is inserted and matched with the first insertion part 150. The second valve body 510 is provided with a second flow channel 511. The second valve body 510 is provided with an inlet 512 and an outlet 513 which are in communication with the second flow channel 511. The second valve core 520 is movably sleeved in the second valve body 510 and arranged in the second flow channel 511. The second valve core 520 is provided with a third flow channel 521 which is used to communicate the inlet 512 and the outlet 513. The third flow channel 521 is communicated with the inlet 512 and the outlet 513 by driving the second valve core 520, or the second valve core 520 is used to block the inlet 512 and the outlet 513.

[0118] After the negative pressure valve 500 is installed, the third flow channel 521 is connected to the inlet 512 and the outlet 513 by driving the second valve core 520. At this time, the negative pressure device can form a negative pressure environment at the inlet 512, the third flow channel 521 and the outlet 513, so that the liquid and tissue in the organ are discharged through the inlet 512, the third flow channel 521 and the outlet 513 in sequence. When the suction is completed or no suction is required, the connection between the inlet 512 and the outlet 513 is blocked by driving the second valve core 520, and the connection between the endoscope and the negative pressure device is disconnected. In this way, when the channel is switched on and off, the negative pressure valve 500 only needs to drive the second valve core 520 to complete the switching operation, which makes the switching operation more convenient and helps to ensure the stable operation.

[0119] It should be noted that driving the second valve core 520 to connect the third flow channel 521 to the inlet 512 and the outlet 513 or to block the inlet 512 and the outlet 513 should be understood as: driving the second valve core 520 to make it perform corresponding actions in the second flow channel 511, when the third flow channel 521 is respectively opposite to the inlet 512 and the outlet 513, the inlet 512 and the outlet 513 are connected; when the second valve core 520 blocks at least one of the inlet 512 and the outlet 513, the inlet 512 and the outlet 513 cannot be connected through the third flow channel 521.

[0120] For further information, please refer to Figure 26 The housing 100 is provided with a wire entry hole 160 that communicates with the accommodating chamber 110. The wire entry hole 160 is used to pass the connection pipe of the negative pressure device that communicates with the outlet 513. When the negative pressure valve 500 is connected to the negative pressure device, the connection pipe of the negative pressure device can pass through the wire entry hole 160 into the accommodating chamber 110 and connect to the negative pressure valve 500, thereby achieving a reliable connection between the negative pressure valve 500 and the negative pressure device. This greatly facilitates the connection between the negative pressure valve 500 and the negative pressure device.

[0121] For further information, please refer to Figure 26 , a first groove 161 is provided on the cavity wall of the accommodating cavity 110. The first groove 161 is located between the third mounting hole 113 and the wire entry hole 160, and the first groove 161 is used to accommodate the connecting pipe of the negative pressure device. Since there is a distance between the negative pressure valve 500 and the negative pressure device, the connecting pipe extending into the accommodating cavity 110 has a certain length. To this end, for this part of the connecting pipe, the present embodiment provides a first groove 161 on the cavity wall of the accommodating cavity 110 so as to accommodate a certain length of connecting pipe, so as to avoid this part of the connecting pipe from interfering with or entangled with the internal structure of the endoscope handle, so that its internal structure is distributed in an orderly and reasonable manner, thereby ensuring that the endoscope can operate stably.

[0122] Optionally, the first groove 161 may be directly formed on the wall of the accommodating cavity 110 by a groove process, or may be protruded outward from the surface of the housing 100 and formed on the wall of the accommodating cavity 110 .

[0123] In one embodiment, please refer to Figure 30 and Figure 31 The second valve body 510 includes a main section 514, a first branch section 515 and a second branch section 516. The first branch section 515 is connected to one end of the main section 514. The second branch section 516 is connected to a side surface of the main section 514. The second flow channel 511 is opened in the main section 514. The inlet 512 is opened on the first branch section 515, and the outlet 513 is opened on the second branch section 516. It can be seen that when sucking liquid or tissue, the second valve core 520 is driven to move in the main section 514, so that the first branch section 515 and the second branch section 516 are connected through the third flow channel 521. At this time, the liquid or tissue will flow through the inlet 512, the first branch section 515, the third flow channel 521 and the second branch section 516 in sequence, and be discharged from the outlet 513.

[0124] Specifically, please refer to Figure 30 The first branch segment 515 and the second branch segment 516 are both arranged at an angle to the main segment 514.

[0125] For further information, please refer to Figure 31 , the second valve core 520 is movable and sleeved in the main body section 514. One end of the second valve core 520 is provided with a first port 523 connected to the third flow channel 521. The first port 523 is connected to the inlet 512. The second valve core 520 is attached to a side surface of the inner wall of the second flow channel 511 and is provided with a second port 522 connected to the third flow channel 521. The second valve core 520 is driven to make the second port 522 and the outlet 513 misaligned or corresponding. It can be seen that in the channel opening and closing switching, the second valve core 520 is driven to move in the second flow channel 511. When the second port 522 corresponds to the outlet 513, the outlet 513, the second port 522, the third flow channel 521, the first port 523 and the inlet 512 are connected to each other, so that the channel in the negative pressure valve 500 is completely opened, so that the negative pressure equipment can extract the inside of the organ. When the second port 522 is misaligned with the outlet 513 , the outlet 513 and the inlet 512 cannot communicate with each other, so that the channel in the negative pressure valve 500 is closed. At this time, the negative pressure device stops working.

[0126] In one embodiment, please refer to Figure 27 and Figure 30 The third plug-in portion 170 is a second slot 171. The fourth plug-in portion 517 is a second plug block 5171 that matches the second slot 171. Thus, when fixing, the second plug block 5171 is inserted into the second slot 171, so that the negative pressure valve 500 is stably installed on the housing 100.

[0127] It should be noted that the number of the second slots 171 and the second blocks 5171 can be one, two or more, and the present embodiment is not limited to this. Meanwhile, the corresponding relationship between the second slots 171 and the second blocks 5171 can be various, such as: the second slots 171 and the second blocks 5171 are one-to-one corresponding insertion configuration; or the second slots 171 and the second blocks 5171 are two-to-one insertion configuration, etc.

[0128] Of course, in other embodiments, the third connecting part 170 can be the second block 5171. The fourth connecting part 517 is the second slot 171 matched with the second slot 171.

[0129] Further, please refer to Figure 30 , the second block 5171 is arranged on the second valve body 510 along the circumferential direction of the second valve body 510, which facilitates the second block 5171 to be inserted into the second slots 171 in different directions, so as to realize that the same second block 5171 is inserted into two or more second slots 171 at the same time.

[0130] In an embodiment, please refer to Figure 27 , the third and fourth surrounding plates 172 and 173 are arranged on the cavity wall of the accommodating cavity 110 in a spaced manner. The third and fourth surrounding plates 172 and 173 are respectively located on the opposite sides of the third mounting hole 113 and form the second slot 171. In this way, the third and fourth surrounding plates 172 and 173 are respectively arranged on the opposite sides of the third mounting hole 113, so that when the negative pressure valve 500 is arranged in the third mounting hole 113, the second block 5171 on the negative pressure valve 500 can be inserted into the second slot 171, thereby making the installation of the negative pressure valve 500 more convenient.

[0131] Optionally, the mounting mode of the third and fourth surrounding plates 172 and 173 on the shell 100 can be, but is not limited to, bolt connection, clamping, riveting, welding, bonding, integral molding, etc. Among them, the integral molding mode is injection molding, 3D printing, etc.

[0132] In an embodiment, please refer to Figure 23 and Figure 26The housing 100 includes a first shell 130 and a second shell 131. The first shell 130 is covered on the second shell 131 and forms a receiving chamber 110 between the first shell 130 and the second shell 131. The second slot 171 includes a third type slot 1711 and a fourth type slot 1712. The third type slot 1711 is opened on the first shell 130. The fourth type slot 1712 is opened on the second shell 131. One end of the second plug 5171 is plugged into the third type slot 1711, and the other end of the second plug 5171 is plugged into the fourth type slot 1712. It can be seen that the housing 100 of this embodiment is composed of a two-part structure. When the second shell 131 is matched with the first shell 130, the opposite ends of the second plug 5171 are plugged into the third type slot 1711 and the fourth type slot 1712, making the negative pressure valve 500 more stable in the housing 100.

[0133] In one embodiment, please refer to Figure 30 The negative pressure valve 500 further includes a second valve cover 530 and a second elastic member 540. The second valve cover 530 is disposed on the second valve core 520. The second elastic member 540 is connected between the second valve cover 530 and the second valve body 510 and is used to drive the second valve core 520 to block the inlet 512 and the outlet 513.

[0134] Optionally, the second elastic member 540 may be, but is not limited to, a spring, elastic rubber, an elastic metal sheet, etc.

[0135] In one embodiment, please refer to Figure 30 The negative pressure valve 500 further includes a second valve sleeve 550 . The second valve sleeve 550 is sleeved on the second valve core 520 and connected to the second valve body 510 .

[0136] In one embodiment, please refer to Figure 23 and Figure 32 The endoscope also includes a three-way valve 600. A fifth plug-in portion 180 is provided on the inner wall of the housing 100. The three-way valve 600 is provided with a sixth plug-in portion 630 that plugs into and mates with the fifth plug-in portion 180. The three-way valve 600 is provided with a first port 611, a second port 621, and a third port 612 that communicate with each other. The first port 611 communicates with the negative pressure valve 500, the second port 621 is used to communicate with the instrument channel valve 1000, and the third port 612 is used to communicate with the instrument channel of the tip 900. Compared to traditional three-way valve 600 installation methods, this method eliminates the need for bolts or screws, reducing the number of parts during endoscope assembly and ensuring a simple and orderly assembly process.

[0137] It should be noted that the number of the fifth plug-in portion 180 and the sixth plug-in portion 630 can be one, two, three or more, and this embodiment does not specifically limit this.

[0138] Optionally, the fifth plug-in part 180 can be a convex structure, and the sixth plug-in part 630 can be a slot or hole structure; or the fifth plug-in part 180 can be a slot or hole structure, and the sixth plug-in part 630 can be a convex structure.

[0139] Specifically, referring to Figure 25 With Figure 32 , the fifth plug-in part 180 is a third insertion slot 181. The sixth plug-in part 630 is a third insertion block 631 matched with the third insertion slot 181, that is, when installing, the third insertion block 631 on the three-way valve 600 is directly inserted into the third insertion slot 181 in the shell 100, and the assembly can be completed, which greatly improves the assembly efficiency and convenience.

[0140] In an embodiment, referring to Figure 25 , the cavity wall of the accommodating cavity 110 is provided with a convex seat 118 for supporting the three-way valve 600. The third insertion slot 181 is arranged on the convex seat 118. In this way, the three-way valve 600 is supported by the convex seat 118 at the same time of plugging, so as to avoid the three-way valve 600 in a suspended state in the shell 100, so that the three-way valve 600 is more stable in the shell 100, thereby being beneficial to improve the use stability of the product.

[0141] Optionally, the mounting mode of the convex seat 118 on the cavity wall of the accommodating cavity 110 can be, but is not limited to, bolt connection, clamping, bonding, riveting, welding, and integral molding, etc. Among them, the integral molding can be injection molding, 3D printing molding, etc.

[0142] Specifically, referring to Figure 25 , the convex seat 118 and the shell 100 are an integrated structure, that is, formed by the cavity wall of the accommodating cavity 110.

[0143] Further, referring to Figure 25 , the side of the convex seat 118 facing the three-way valve 600 is provided with a second groove 182. The second groove 182 is used to match the outer surface of the three-way valve 600, so that the three-way valve 600 is more stable on the convex seat 118 through the cooperation of the second groove 182 and the outer surface of the three-way valve 600, avoiding the left and right shaking of the three-way valve 600 in use.

[0144] It should be noted that "matching" should be understood as: the groove shape of the second groove 182 should be consistent with the shape of the outer surface of the three-way valve 600, so that the outer surface of the three-way valve 600 can better fit in the second groove 182.

[0145] In an embodiment, referring to Figure 25The boss 118 is provided with a notch 183 that communicates with the third slot 181. The notch 183 is used to pass the connecting pipe between the negative pressure valve 500 and the three-way valve 600; alternatively, the three-way valve 600 is used to pass through it. As can be seen, when the three-way valve 600 is plugged into the boss 118, a connecting pipe is provided between the three-way valve 600 and the negative pressure valve 500. To this end, the notch 183 is provided in the boss 118 to facilitate the passage of the connecting pipe, avoiding structural interference between the connecting pipe and the boss 118, which could make it difficult to arrange the connecting pipe. Of course, during installation, a portion of the three-way valve 600 can also be passed through the notch 183. This also effectively avoids structural interference between the connecting pipe and the boss 118, making the internal structure of the endoscope more rational. Of course, to facilitate the distribution and fixation of the connecting pipe, a wire pipe bracket 114 can be provided within the housing 100 to secure the connecting pipe and the piping on the air-water valve 400.

[0146] In one embodiment, please refer to Figure 25 The boss 118 includes a support plate 190 and a first side plate 191 and a second side plate 192 disposed on opposite sides of the support plate 190. The first side plate 191, the second side plate 192, and the support plate 190 together form a third slot 181. A gap 183 is left between the first side plate 191 and the second side plate 192. Thus, the support plate 190, the first side plate 191, and the second side plate 192 simultaneously form the third slot 181 and the gap 183, which helps simplify the structural design.

[0147] Specifically, please refer to Figure 25 The support plate 190, the first side plate 191 and the second side plate 192 are an integrated structure.

[0148] In one embodiment, please refer to Figure 23 and Figure 26The housing 100 includes a first shell 130 and a second shell 131. The first shell 130 is covered on the second shell 131 and forms a receiving cavity 110 with the second shell 131. The boss 118 includes a first boss 1181 and a second boss 1182. The first boss 1181 is provided on the first shell 130. The second boss 1182 is provided on the second shell 131. The third slot 181 includes a fifth type slot 1811 and a sixth type slot 1812. The fifth type slot 1811 is provided on the first boss 1181, and the sixth type slot 1812 is provided on the second boss 1182. One end of the third plug 631 is plugged into and matched with the fifth type slot 1811, and the other end of the third plug 631 is plugged into and matched with the sixth type slot 1812. It can be seen from this that when the first shell 130 and the second shell 131 cooperate with each other, the three-way valve 600 is supported between the first protrusion 1181 and the second protrusion 1182 respectively; at the same time, the third plug 631 on the three-way valve 600 is inserted into the fifth type slot 1811 and the sixth type slot 1812 respectively, so that the installation of the three-way valve 600 is more stable.

[0149] It should be noted that, for ease of understanding and description, this embodiment divides the boss 118 into a first boss 1181 and a second boss 1182. Therefore, the distinctions between the first boss 1181, the second boss 1182, and the boss 118 are merely names; their structures are identical or similar. Similarly, the fifth-type slot 1811 and the sixth-type slot 1812 are different names for the third slot 181, and their structures are also identical or similar.

[0150] In one embodiment, please refer to Figure 25 , there are two bosses 118. There are two third plug-ins 631. The two bosses 118 are spaced apart along the length direction of the shell 100. The two third plug-ins 631 are spaced apart along the length direction of the three-way valve 600. The two bosses 118 correspond one-to-one to the two third plug-ins 631. The shell 100 is provided with a first opening 115 and a second opening 116 that are connected to the accommodating chamber 110. The second port 621 is provided through the first opening 115. The third port 612 is provided toward the second opening 116. The notch 183 of one of the bosses 118 is used to be set toward the negative pressure valve 500, and the notch 183 of the other boss 118 is set toward the second opening 116.

[0151] In one embodiment, please refer to Figure 32The three-way valve 600 includes a first tube body 610 and a second tube body 620. One end of the second tube body 620 is connected to the first tube body 620, and the other end of the second tube body 620 is inserted into the first opening 115. The first port 611 and the third port 612 are respectively provided at opposite ends of the first tube body 610. The second port 621 is provided at the end of the second tube body 620 away from the first tube body 610. The sixth plug-in portion 630 is provided on the first tube body 610 and / or the second tube body 620. In this way, the three-way valve 600 has a good three-way control function.

[0152] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

[0154] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0155] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0156] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0157] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0158] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. An endoscope, characterized in that: The endoscope comprises: A housing, wherein the housing is provided with a first mounting hole communicating with the inside and outside of the housing; A knob device, the knob device comprising a first wire pulling wheel and a second wire pulling wheel rotatably mounted in the housing, and a first knob and a second knob located outside the housing, the first wire pulling wheel extending out of the housing through the first mounting hole, the first wire pulling wheel having a first through-hole extending therethrough, the second wire pulling wheel extending out of the housing through the first through-hole, the first knob being sleeved on the first wire pulling wheel, the second knob being stacked on the first knob and sleeved on the second wire pulling wheel; A braking device, comprising a first brake assembly and a second brake assembly, wherein the first brake assembly is disposed between the first wire pulling wheel and the housing and is used to clamp the first knob or the first wire pulling wheel to achieve braking; the second brake assembly is disposed on the side of the second knob facing away from the first knob and is used to clamp the second knob or the second wire pulling wheel to achieve braking; and the first brake assembly and the second brake assembly can be braked independently; The first brake assembly includes a first fixing frame, a first brake button, and at least two first brake members slidably mounted on the first fixing frame. The first fixing frame is positioned on the housing. The first brake button is sleeved on the outside of the first fixing frame. When the first brake button rotates, it can push the first brake member to slide to hold the first knob or the first pulling wheel tightly. The knob device further includes a first bracket disposed in the housing, a second through-hole is formed through the second wire pulling wheel, the first bracket passes through the second through-hole and extends out of the housing, and the second brake assembly is mounted on the first bracket; The second brake assembly includes a second fixing frame, a second brake button, and at least two second brake members slidably mounted on the second fixing frame. The second fixing frame is positioned on the first bracket, and the second brake button is sleeved on the outside of the second fixing frame. When the second brake button rotates, it can push the second brake member to slide to hold the second knob or the second pulley. The snake bone is located outside the shell and is connected to the first pulling wheel and the second pulling wheel respectively through a traction line.

2. The endoscope according to claim 1, wherein: The first fixing frame is provided with a first working cavity for the first pulling wheel to pass through, the first knob extends into the first working cavity and is sleeved on the first pulling wheel, and when the first brake button rotates, it can push the first brake member to extend into the first working cavity and hold the first knob tightly.

3. The endoscope according to claim 2, wherein: The first bracket is provided with a first fixing hole, the second brake button is provided with a second fixing hole corresponding to the first fixing hole, and fasteners are inserted into the first fixing hole and the second fixing hole so that the second brake button can be rotatably mounted on the first bracket.

4. The endoscope according to claim 3, wherein: The second knob is provided with a brake ring, and the second fixing frame is provided with a second working cavity for the brake ring to penetrate. When the second brake knob rotates, it can push the second brake member into the second working cavity and hold the brake ring tightly.

5. The endoscope according to any one of claims 1 to 4, characterized in that: The endoscope also includes an air and water valve and a tip end provided on the snake bone. The air and water valve is embedded in the shell. A first plug-in portion is provided on the inner wall of the shell. The air and water valve is provided with a second plug-in portion that is plugged into and matched with the first plug-in portion.

6. The endoscope according to any one of claims 1 to 4, characterized in that: The endoscope further comprises a negative pressure valve, which is embedded in the shell. A third plug-in portion is provided on the inner wall of the shell, and a fourth plug-in portion is provided on the negative pressure valve for plugging with the third plug-in portion.

7. The endoscope according to claim 6, characterized in that The endoscope also includes a three-way valve, a fifth plug-in portion is provided on the inner wall of the shell, and a sixth plug-in portion is provided on the three-way valve to be plugged into and matched with the fifth plug-in portion. The three-way valve is provided with a first port, a second port and a third port that are interconnected, the first port is connected to the negative pressure valve, the second port is used to connect to the instrument channel valve, and the third port is used to connect to the instrument channel of the tip.

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