Elastic pressing type insertion mechanism and endoscope

Abstract

The invention relates to the technical field of medical instruments, in particular to an elastic pressing type insertion mechanism and an endoscope, the elastic pressing type insertion mechanism applied to the endoscope comprises an intubation tube, an imaging assembly, a front guide sleeve and an elastic assembly, the intubation tube is provided with a first tube cavity and a second tube cavity, the first tube cavity is used for allowing a working instrument to pass through a channel extending into the uterus, and the second tube cavity is used for allowing the working instrument to pass through a channel extending into the uterus; the second pipe cavity is used for a water injection circulation channel and an FPC flat cable penetrating channel, the imaging assembly is installed at the far end of the cannula, the elastic assembly is used for controlling the imaging assembly to reset, one end of the elastic assembly is installed on the imaging assembly, and the other end of the elastic assembly is installed on the cannula. The endoscope comprises the insertion mechanism and a holding operation assembly, and an instrument channel communicated with the first tube cavity of the intubation tube is arranged in the holding operation assembly. Work instruments in the insertion part with the small size can smoothly pass through the insertion part, operation is convenient, the insertion part with the large size can be prevented from being formed, and secondary damage caused by scratching of the cervix uteri opening is further avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a spring-loaded insertion mechanism and an endoscope. Background Art

[0002] A visible uterine cavity endoscope is a common medical device used to observe and examine the internal organs of the female reproductive system, including the uterus, pelvic cavity, fallopian tubes, and ovaries. The uterine cavity endoscope generally consists of a slender lens and a light source. By inserting it into the vagina and the cervical orifice, doctors can directly observe the internal conditions of the uterine cavity. The visible uterine cavity endoscope can be used for the diagnosis and treatment of various gynecological diseases, such as abnormal bleeding, infertility, endometriosis, etc. It is usually a simple and non-invasive examination and treatment process carried out in a hospital or clinic. During the operation, doctors can use this device to obtain images and perform biological tissue sampling for pathological examination.

[0003] When performing uterine examination and treatment, the cervical oral cavity of the human body is generally small. For the endoscope to pass through smoothly, its insertion part must be very thin and also have a certain hardness. In addition, the insertion part is also the execution end of the endoscope, and components such as lighting LEDs or light guide beams, camera modules, flushing devices, and instrument channel tubes need to be arranged inside the insertion part. These devices all require an insertion part with a larger inner diameter. In summary, an insertion part with a larger size may scratch the cervical orifice and cause secondary damage, while a smaller size of the insertion part will inevitably make the instrument channel inside the instrument tube smaller. The narrow instrument channel will increase the operation difficulty, reduce the surgical efficiency, and also affect the fluid flow efficiency during the water injection and aspiration processes, hindering normal examination and treatment. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a spring-loaded insertion mechanism and an endoscope to at least solve the problems that an insertion part with a larger existing size may scratch the cervical orifice and cause secondary damage, and a smaller size of the insertion part will inevitably make the instrument channel inside the instrument tube smaller, and the narrow instrument channel will increase the operation difficulty and reduce the surgical efficiency.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] In a first aspect, the present invention provides a spring-loaded insertion mechanism applied to an endoscope, including:

[0007] An intubation tube for inserting through the cervix into the uterus. The intubation tube has a first lumen and a second lumen extending from the proximal port part of the intubation tube to the distal port part of the intubation tube. The first lumen is used for the working instrument to pass through and extend into the uterine channel, and the second lumen is used for the water injection circulation channel and the FPC cable to pass through.

[0008] An imaging component for obtaining images of the interior of the uterus, the imaging component being mounted at the distal end of the cannula;

[0009] A front guide sleeve for wrapping part of the imaging component and limiting the movement of the imaging component, the front guide sleeve being mounted at the distal end of the cannula;

[0010] An elastic component for controlling the reset of the imaging component, one end of the elastic component being mounted on the imaging component and the other end being mounted on the cannula;

[0011] When the elastic component is in a free state, the front guide sleeve wraps part of the imaging component and blocks the first lumen, and the imaging component can also be lifted by the working instrument inserted so that the working instrument passes through the first lumen.

[0012] By the above technical solution, on the one hand, during use, the working instrument passes through the first lumen and enters the interior of the uterus for operation. The entry of the working instrument will force the imaging component to be lifted. At this time, the elastic component deforms. After the working instrument finishes the operation and exits the interior of the uterus, under the action of the elastic component restoring deformation, the imaging component resets and is partially wrapped in the front guide sleeve, so that the size of the distal end part of the entire insertion mechanism is restored, so that the insertion mechanism can exit from the uterus. On the other hand, during use, a channel for injecting water into the interior of the uterus can be formed through the second lumen, and a channel for sucking out the water in the interior of the uterus can be formed through the first lumen, so as to facilitate more clear and accurate observation and operation of the interior of the uterus. The elastic pressing type insertion mechanism of the present invention can not only enable the smooth passage of the working instrument in the insertion part with a smaller size, which is convenient for operation, but also avoid forming an insertion part with a larger size, further avoiding scratching the cervical orifice and causing secondary damage.

[0013] In combination with the first aspect, in some embodiments, the elastic component is a shrapnel with deformation ability, one end of the shrapnel is inserted into the distal end of the cannula, and the other end is fixed on the imaging component.

[0014] In combination with the first aspect, in some embodiments, a first support member is installed inside the distal end of the cannula, and a shrapnel fixing groove is provided on the first support member, and one end of the shrapnel is inserted into the shrapnel fixing groove.

[0015] In combination with the first aspect, in some embodiments, the imaging component includes:

[0016] A lens module for photographing images of the interior of the uterus;

[0017] A lens holder for mounting and fixing the lens module, and the other end of the shrapnel is fixedly mounted on the lens holder;

[0018] At least one LED lamp, which is used to illuminate the interior of the uterus, and the LED lamp is arranged on the outer circumference of the lens module.

[0019] In combination with the first aspect, in some embodiments, the front guide sleeve is an arc-shaped housing structure adapted to the outer contour of the lens holder. When the elastic piece is in a free state, part of the lens holder is wrapped in the front guide sleeve.

[0020] In combination with the first aspect, in some embodiments, the opposite sides of the front guide sleeve have rotary holes, and rotary shafts are fixed on both opposite sides of the elastic piece on the lens holder, and the rotary shafts are inserted into the rotary holes.

[0021] In combination with the first aspect, in some embodiments, a water outlet groove is further provided on the outer side wall of the front guide sleeve, and the water outlet groove communicates with the second lumen.

[0022] In combination with the first aspect, in some embodiments, the intubation tube includes an inner tube and an outer tube. The outer tube is sleeved on the inner tube, and the gap between the inner tube and the outer tube forms a second lumen, and the hollow interior of the inner tube forms a first lumen.

[0023] In combination with the first aspect, in some embodiments, the inner tube and the outer tube are eccentrically arranged.

[0024] In a second aspect, the present invention provides an endoscope, and the endoscope includes the above-mentioned elastic pressing insertion mechanism.

[0025] In combination with the second aspect, in some embodiments, the endoscope further includes a holding and operating assembly. The proximal end of the intubation tube is installed in the holding and operating assembly, and an instrument channel communicating with the first lumen of the intubation tube is provided in the holding and operating assembly.

[0026] In combination with the second aspect, in some embodiments, the holding and operating assembly includes a housing, a knob, a support sleeve and a rear guide sleeve. The support sleeve is rotatably installed inside the housing. The support sleeve is fixedly sleeved on the proximal end of the intubation tube. The rear guide sleeve passes through the housing and is fixedly connected to the knob. The knob is located outside the housing, and the knob is used to control the rotation angle of the intubation tube.

[0027] In combination with the second aspect, in some embodiments, the proximal end of the inner tube is located outside the support sleeve, the proximal end of the outer tube is located inside the support sleeve, and a support tube is fixedly sleeved on the proximal end of the inner tube. One end of the support tube is inserted into the support sleeve, and the other end is fixed in the rear guide sleeve.

[0028] In combination with the second aspect, in some embodiments, a through hole is provided in the rear guide sleeve, and the through hole communicates with the inside of the support tube to form an instrument channel.

[0029] In combination with the second aspect, in some embodiments, a water injection connecting pipe is connected to the support sleeve, the water injection connecting pipe communicates with the second lumen, a water injection pipe is connected to the water injection connecting pipe, a drainage connecting pipe is connected to the rear guide sleeve, a drainage pipe is connected to the drainage connecting pipe, and the drainage connecting pipe communicates with the instrument channel.

[0030] In combination with the second aspect, in some embodiments, the support sleeve includes a front sleeve and a rear sleeve fixedly connected. A plurality of steel ball grooves are circumferentially and equidistantly arranged on the outer wall of the front sleeve. A steel ball column is fixed to the inner wall of the housing corresponding to the position of the front sleeve, and a movable steel ball is placed in the steel ball column.

[0031] In combination with the second aspect, in some embodiments, a spring is installed between the steel ball column and the steel ball.

[0032] In combination with the second aspect, in some embodiments, a limiting column is fixed to the outer wall of the front sleeve, and a clamping block is further installed on the inner wall of the housing. The clamping block is used to limit the unlimited rotation of the limiting column.

[0033] In combination with the second aspect, in some embodiments, a sealing seat is installed between the support tube and the support sleeve. A first sealing ring and a retaining ring are arranged in the sealing seat, and both the first sealing ring and the retaining ring are sleeved on the support tube.

[0034] In combination with the second aspect, in some embodiments, a second sealing ring and a retaining ring are installed near the knob in the rear guide sleeve. The retaining ring is located outside the second sealing ring, and both the second sealing ring and the retaining ring are provided with through holes.

[0035] The elastic pressing insertion mechanism of the present invention connects the imaging assembly and the cannula through an elastic component. During use, the imaging assembly is pushed open by the inserted working instrument to create a channel space for the working instrument to extend out for operation. It can provide sufficient channel space for the working instrument without causing secondary harm to the patient. At the same time, after the working instrument is withdrawn, under the action of the deformation recovery force of the elastic component, the imaging assembly falls back to its original position and is partially hidden in the front guide sleeve, reducing the contour size of the distal end of the entire insertion mechanism for the smooth withdrawal of the entire insertion mechanism and improving the surgical efficiency.

[0036] For the endoscope of the present invention, by rotating the knob, the rear guide sleeve can be driven to rotate, and then the support tube and the support sleeve can be driven to rotate, enabling the inner tube and the outer tube to rotate simultaneously to adjust and control the rotation angle of the insertion mechanism. This is convenient for the imaging assembly to obtain uterine internal images from multiple angles and for the multi-angle operation of the working instrument, making it flexible and convenient to use. During the rotation of the support sleeve, the cooperation between the steel ball grooves and the steel balls can achieve multi-gear selection of the rotation angle, and the cooperation between the clamping block and the limiting column can prevent the excessive rotation of the support sleeve, avoiding chaos of the internal wiring and connecting pipes. Brief Description of the Drawings

[0037] Figure 1 is a schematic cross-sectional structure diagram of the spring-loaded insertion mechanism of Embodiment 1;

[0038] Figure 2 is a schematic structure diagram of the lens assembly reset to its original position;

[0039] Figure 3 is a schematic structure diagram of the lens assembly being pushed open;

[0040] Figure 4 is a schematic structure diagram of the first support member;

[0041] Figure 5 is Figure 2 an enlarged view of the E-E cross-sectional view in;

[0042] Figure 6 is a schematic structure diagram of the front guide sleeve;

[0043] Figure 7 is a schematic structure diagram of the endoscope of Embodiment 2;

[0044] Figure 8 is a schematic cross-sectional structure diagram of the endoscope of Embodiment 2;

[0045] Figure 9 is Figure 8 an enlarged view of the C-C cross-sectional view in;

[0046] Figure 10 is Figure 8 an enlarged view of the D-D cross-sectional view in;

[0047] Figure 11 is Figure 8 an enlarged view of the H-H cross-sectional view in;

[0048] Figure 12 is Figure 11 an enlarged view of the portion at A in;

[0049] Figure 13 is a schematic structure diagram of the support sleeve;

[0050] Figure 14 is a schematic structure diagram of the rear guide sleeve;

[0051] Among them, the intubation tube 110, the inner tube 111, the outer tube 112, the water outlet hole 1120, the elastic piece 120, the lens module 131, the lens holder 132, the rotation shaft 1321, the LED lamp 133, the first lumen 140, the second lumen 150, the FPC cable 160, the first support member 170, the elastic piece fixing groove 171, the FPC wire passing groove 172, the water passing groove 173, the front guide sleeve 180, the rotation hole 181, the water outlet groove 182;

[0052] The housing 210, the snap ring 211, the steel ball column 212, the steel ball 213, the spring 214, the block 215, the knob 220, the operation panel 230, the support sleeve 240, the limit ring 241, the steel ball groove 242, the water injection connecting pipe 243, the limit post 244, the rear guide sleeve 250, the drainage connecting pipe 251, the support pipe 260, the sealing seat 270, the first sealing ring 271, the retaining ring 272, the second sealing ring 281, the retaining ring 282, the wire passing hole 290;

[0053] The water injection pipe 310, the drain pipe 320, the pressure sensor 311. Specific embodiments

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0055] For those conditions not specified in the following embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For raw materials, equipment or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0056] Embodiment 1

[0057] Please refer to Figures 1-6, this embodiment describes a spring-loaded insertion mechanism that can be applied to an endoscope for examining a patient's uterus. The spring-loaded insertion mechanism includes an intubation tube 110, an imaging assembly, a front guide sleeve 180, and an elastic component. The intubation tube 110 is used to insert through the cervix into the uterus. The intubation tube 110 has a first lumen 140 and a second lumen 150 that extend from the proximal port portion of the intubation tube 110 to the distal port portion of the intubation tube 110. The first lumen 140 is used as a passage for a working instrument to extend into the uterus and as a passage for discharging the internal fluid of the uterus. The second lumen 150 is used as a water injection flow passage and a passage for an FPC cable to pass through. The imaging assembly is mounted at the distal end of the intubation tube 110 and is used to acquire images of the interior of the uterus. The front guide sleeve 180 is used to wrap part of the imaging assembly and limit the movement of the imaging assembly. The front guide sleeve 180 is mounted at the distal end of the intubation tube 110. The elastic component is used to control the reset of the imaging assembly. One end of the elastic component is mounted on the imaging assembly, and the other end is mounted on the intubation tube 110. When the elastic component is in a free state, the front guide sleeve wraps part of the imaging assembly and blocks the first lumen, and the imaging assembly can also be lifted by the inserted working instrument until the working instrument passes through the first lumen.

[0058] In this embodiment, the distal end of the intubation tube 110 refers to the end of the intubation tube 110 that extends into the uterus, and the proximal end of the intubation tube 110 refers to the end of the intubation tube 110 that is opposite to the distal end.

[0059] In this embodiment, the imaging assembly further includes one or more flexible printed circuits (FPCs). The FPC cable 160 is led out from the imaging assembly, arranged below the elastic component, and extends to the second lumen 150, and uses the second lumen 150 as a passage to connect with the electronic components in the endoscope.

[0060] The working instrument can be used for surgical or biopsy purposes. The working instrument includes, but is not limited to, various biopsy instruments (such as forceps, graspers, and scissors, etc.) having a size of 5Fr or smaller.

[0061] On the one hand, during use, the working instrument passes through the first lumen 140 and enters the interior of the uterus for operation. When the working instrument enters, the imaging component is forced to lift up. At this time, the elastic component deforms. After the operation of the working instrument is completed and it exits the interior of the uterus, under the action of the elastic component recovering its deformation, the imaging component naturally falls back to its original position and is partially hidden in the front guide sleeve, so that the size of the distal end part of the entire insertion mechanism is restored to the minimum, facilitating the withdrawal of the insertion mechanism from the uterus. On the other hand, during use, a channel for injecting water into the interior of the uterus can be formed through the second lumen 150, and a channel for sucking out the water in the interior of the uterus can be formed through the first lumen 140, so as to facilitate more clear and accurate observation and operation of the interior of the uterus. Through the above technical solutions, it is possible to smoothly pass the working instrument in the insertion part with a smaller size, which is convenient for operation, and at the same time, it is possible to avoid forming an insertion part with a larger size, further avoiding scratching the cervix and causing secondary damage.

[0062] The cannula 110 is an elongated, tubular member, and the size of the cannula 110 is such that it can pass through the cervix and enter the uterus. The cannula 110 includes an inner tube 111 and an outer tube 112. The outer tube 112 is sleeved on the inner tube 111. The gap between the inner tube 111 and the outer tube 112 forms the second lumen 150, and the hollow interior of the inner tube 111 forms the first lumen 140. Please refer to Figure 5 , in order to minimize the radial size of the cannula 110 as much as possible, the inner tube 111 and the outer tube 112 are eccentrically arranged. The side with a larger gap between the eccentrically arranged inner tube 111 and outer tube 112 serves as the main channel of the second lumen 150, which is used as the main flow channel for the FPC cable 160 to pass through the channel and for water injection.

[0063] The elastic component is a shrapnel 120 with deformation ability. One end of the shrapnel 120 is inserted into the distal end of the cannula 110, and the other end is fixed to the imaging component. The shrapnel 120 is generally made of a metal material.

[0064] In order to better install the shrapnel 120, a first support member 170 is installed inside the distal end of the cannula 110. Please refer to Figure 4 , the first support member 170 is fixedly clamped on the distal end of the inner tube 111, and the first support member 170 is located inside the distal end of the outer tube 112. The first support member 170 has a shrapnel fixing groove 171, and one end of the shrapnel 120 is inserted into the shrapnel fixing groove 171. The inner wall of the first support member 170 also has an FPC wire groove 172, and the FPC wire groove 172 is located below the shrapnel fixing groove 171 to facilitate the smooth passing of the FPC cable 160.

[0065] To better inject water into the uterus, the first support member 170 is also provided with an axial water channel 173. The water channel 173 communicates with the second lumen 150, and the outer tube 112 has at least one water outlet hole 1120 at a position corresponding to the water channel 173.

[0066] The imaging assembly includes a lens module 131, a lens holder 132, and at least one LED lamp 133. The lens module 131 generally includes a camera capable of taking pictures for capturing images of the interior of the uterus. The lens holder 132 is used to mount and fix the lens module 131. The other end of the elastic piece 120 is fixedly installed on the lens holder 132, and the free end of the lens holder 132 is a smooth cylindrical shape. The LED lamp 133 is used to illuminate the interior of the uterus, and the LED lamp 133 is arranged on the outer circumference of the lens module 131.

[0067] Please refer to Figure 6 , the front guide sleeve 180 is an arc-shaped housing structure adapted to the outer contour of the lens holder 132. When the elastic piece 120 is in a free state, a part of the lens holder 132 is wrapped in the front guide sleeve 180. At this time, the front guide sleeve 180 can limit the relative two side surfaces of the lens holder 132, making it more conducive to the distal end part size of the entire insertion mechanism to return to the minimum. For better and smoother reset of the imaging assembly, the relative two sides of the front guide sleeve 180 have rotation holes 181, and rotation shafts 1321 are fixedly installed on the lens holder 132 on the relative two sides of the elastic piece 120. The rotation shafts 1321 are inserted into the rotation holes 181. When there is no working instrument passing through for operation, the imaging assembly can be partially hidden in the front guide sleeve 180. When there is a working instrument passing through for operation, the imaging assembly is lifted to the outside of the front guide sleeve 180. There is also a water outlet groove 182 on the outer side wall of the front guide sleeve 180. The water outlet groove 182 communicates with the water channel 173, enabling the water outlet groove 182 to communicate with the second lumen, and further realizing effective water injection into the uterus through the insertion mechanism.

[0068] Embodiment 2

[0069] Please refer to Figures 1-14, this embodiment describes an endoscope, which includes the elastic pressing insertion mechanism and the holding and operating assembly of Embodiment 1. The proximal end of the cannula 110 is rotatably installed in the holding and operating assembly, and an instrument channel communicating with the first lumen 140 of the cannula 110 is provided in the holding and operating assembly. The holding and operating assembly includes a housing 210, a knob 220, an operation panel 230, a support sleeve 240, and a rear guide sleeve 250. The support sleeve 240 is rotatably installed inside the housing 210. The support sleeve 240 is fixedly sleeved on the proximal end of the cannula 110. The rear guide sleeve 250 passes through the housing 210 and is fixedly connected to the knob 220. The knob 220 is located outside the housing 210, and the knob 220 is used to control the rotation angle of the cannula 110. The operation panel 230 is used to input operation instructions and control the operation of each component of the endoscope.

[0070] In this embodiment, in order to make the support sleeve 240 rotate more stably inside the housing 210, a limiting ring 241 is fixed on the outer wall of the support sleeve 240, and a clamping ring 211 is fixed on the inner wall of the housing 210 corresponding to the position of the limiting ring 241. The clamping ring 211 abuts against the limiting ring 241.

[0071] The proximal end of the inner tube 111 is located outside the support sleeve 240, the proximal end of the outer tube 112 is located inside the support sleeve 240. A support tube 260 is fixedly sleeved on the proximal end of the inner tube 111, and the inside of the inner tube 111 communicates with the inside of the support tube 260. One end of the support tube 260 is inserted into the inside of the support sleeve 240, and the other end is fixed inside the rear guide sleeve 250. The rear guide sleeve 250 has an axial through hole, and the through hole communicates with the inside of the support tube 260 to form an instrument channel.

[0072] A water injection connection pipe 243 is connected to the support sleeve 240. The water injection connection pipe 243 communicates with the second lumen 150. The water injection connection pipe 243 is connected to a water injection pipe 310. A drainage connection pipe 251 is connected to the rear guide sleeve 250. The drainage connection pipe 251 is connected to a drainage pipe 320. The drainage connection pipe 251 communicates with the instrument channel. In order to avoid excessive dilation of the uterus during uterine cavity distension, a pressure sensor 311 is installed on the water injection pipe 310 to monitor the internal pressure of the uterus for controlling water injection. The pressure sensor 311 is located inside the housing 210.

[0073] Please refer to Figure 11 and 13, the support sleeve 240 includes a front sleeve and a rear sleeve that are fixedly connected. A plurality of steel ball grooves 242 are circumferentially and equidistantly arranged on the outer wall of the front sleeve. A steel ball column 212 is fixed to the inner wall of the housing 210 corresponding to the position of the front sleeve. A movable steel ball 213 is placed inside the steel ball column 212, and a spring 214 is installed between the steel ball column 212 and the steel ball 213. When the support sleeve 240 rotates, when a steel ball groove 242 is opposite to the position of the steel ball 213, a part of the steel ball 213 will be located inside the steel ball groove 242. When the steel ball groove 242 is misaligned with the position of the steel ball 213, at this time, the steel ball 213 will be entirely located inside the steel ball column 212. Through the cooperation of the steel ball groove 242 and the steel ball 213, a certain damping gear feeling is formed for the rotation of the support sleeve 240.

[0074] Since there are connecting pipes and FPC cable 160 inside the housing 210, if the support sleeve 240 rotates without limit, it will affect the connecting water pipe and FPC cable 160. To prevent the support sleeve 240 from rotating without limit by 360°, a limit post 244 is fixed on the outer wall of the front sleeve, and a clamping block 215 is also installed on the inner wall of the housing 210. The clamping block 215 is used to limit the unlimited rotation of the limit post 244.

[0075] To enhance the sealing performance of the entire endoscope, a sealing seat 270 is installed between the support tube 260 and the support sleeve 240. A first sealing ring 271 and a retaining ring 272 are provided inside the sealing seat 270, and both the first sealing ring 271 and the retaining ring 272 are sleeved on the support tube 260. A second sealing ring 281 and a retaining ring 282 are installed inside the rear guide sleeve 250 near the knob 220. The retaining ring 282 is located outside the second sealing ring 281, and both the second sealing ring 281 and the retaining ring 282 have through holes.

[0076] To better arrange the FPC cable 160, the support sleeve 240 has a cable arranging hole 290, and the FPC cable 160 passes through the cable arranging hole 290 and enters between the outer tube 112 and the inner tube 111.

[0077] A second support member is also installed between the proximal end of the outer tube 112 and the inner tube 111. The second support member is fixedly sleeved on the inner tube 111. The second support member has a channel for water injection to flow through. Preferably, the second support member has the same structure as the first support member 170.

[0078] After the FPC cable 160 enters the interior of the housing 210, it passes through the cable arranging hole on the support sleeve 240 and enters the support sleeve 240, and then passes through the second support member and enters the second lumen 150 between the outer tube 112 and the inner tube 111, and extends to the distal end of the insertion tube 110. At the distal end of the insertion tube 110, the FPC cable 160 is arranged below the elastic piece 120, and passes through the FPC cable groove 160 of the first support member 170 and is connected to the lens module 131 through the lens holder 132.

[0079] The water injection pipe is connected to an external water injection mechanism, and the drain pipe is connected to an external negative pressure suction mechanism. When injecting water into the uterus, the flowing water injected through the water injection pipe enters the interior of the support sleeve 240, and enters the second lumen 150 between the outer tube 112 and the inner tube 111 through the second support member, flows through the second lumen 150 to the first support member 170, and realizes water injection into the uterus through the water through-flow groove, the water outlet holes and the water outlet groove. When discharging the waste liquid in the uterus, the waste liquid enters the interior of the inner tube 111, that is, the interior of the first lumen 140, through the distal end of the cannula 110, flows into the interior of the support tube 260, and then is discharged through the drain connection pipe into the drain pipe.

[0080] After the working instrument is inserted from the position of the knob 220 into the guide sleeve 250, it sequentially passes through the retaining ring, the second sealing ring, and the support tube 260, enters the interior of the inner tube 111, passes through and extends to the distal end of the inner tube 111, and lifts the imaging assembly. After the operation of the working instrument is completed, the instrument is taken out, and the imaging assembly naturally falls back into the front guide sleeve 180 under the action of the deformation restoring force of the elastic piece 120, and the overall contour size of the insertion part of the insertion mechanism shrinks.

[0081] By rotating the knob 220, the rear guide sleeve 250 can be driven to rotate, and then the support tube 260 and the support sleeve 240 can be driven to rotate, so that the inner tube 111 and the outer tube 112 can rotate simultaneously, which is used to adjust and control the rotation angle of the insertion mechanism, so as to facilitate the imaging assembly to obtain images of the interior of the uterus from multiple angles, and facilitate the multi-angle operation of the working instrument. The cooperation of the steel ball groove and the steel ball can realize multi-gear selection of the rotation angle. The cooperation of the clamping block and the limiting post can prevent the over-rotation of the support sleeve 240, resulting in chaos of the internal wire arrangement and connection pipes.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A spring-loaded insertion mechanism, characterized in that, Applied to an endoscope, including: An intubation tube for inserting through the cervix into the uterus. The intubation tube has a first lumen and a second lumen extending from the proximal port part of the intubation tube to the distal port part of the intubation tube. The first lumen is for a working instrument to pass through the channel extending into the uterus, and the second lumen is for a water injection circulation channel and an FPC cable to pass through the channel; An imaging assembly for acquiring images of the interior of the uterus, and the imaging assembly is installed at the distal end of the intubation tube; A front guide sleeve for wrapping part of the imaging assembly and limiting the movement of the imaging assembly. The front guide sleeve is installed at the distal end of the intubation tube; An elastic assembly for controlling the reset of the imaging assembly. One end of the elastic assembly is installed on the imaging assembly, and the other end is installed on the intubation tube; When the elastic assembly is in a free state, the front guide sleeve wraps part of the imaging assembly and blocks the first lumen, and the imaging assembly can also be lifted by the inserted working instrument until the working instrument passes through the first lumen.

2. The snap-in mechanism according to claim 1, wherein, The elastic assembly is a shrapnel with deformation ability. One end of the shrapnel is inserted into the distal end of the intubation tube, and the other end is installed on the imaging assembly.

3. The elastic pressing and inserting mechanism according to claim 2, wherein, A first support member is installed inside the distal end of the intubation tube. The first support member has a shrapnel fixing groove, and one end of the shrapnel is inserted into the shrapnel fixing groove.

4. The snap-in mechanism according to claim 2, wherein, The imaging assembly includes: A lens module for taking images of the interior of the uterus; A lens holder for installing and fixing the lens module, and the other end of the shrapnel is fixedly installed on the lens holder; At least one LED lamp for illuminating the interior of the uterus, and the LED lamp is arranged on the outer circumference of the lens module.

5. The snap-in mechanism according to claim 4, wherein, The front guide sleeve is an arc-shaped housing structure adapted to the outer contour of the lens holder. When the shrapnel is in a free state, part of the lens holder is wrapped in the front guide sleeve.

6. The elastic pressing and inserting mechanism according to claim 5, wherein, The opposite sides of the front guide sleeve have rotation holes, and rotation shafts are fixedly installed on both sides of the shrapnel on the lens holder, and the rotation shafts are inserted into the rotation holes.

7. A snap-in mechanism according to claim 6, wherein, The outer side wall of the front guide sleeve also has a water outlet groove, and the water outlet groove communicates with the second lumen.

8. A snap-in mechanism according to claim 1, wherein, The intubation tube includes an inner tube and an outer tube. The outer tube is sleeved on the inner tube, and the gap between the inner tube and the outer tube forms the second lumen, and the hollow interior of the inner tube forms the first lumen.

9. The snap-in mechanism according to claim 8, wherein, The inner tube and the outer tube are eccentrically arranged.

10. An endoscope, characterized in that, The endoscope includes an elastic pressing insertion mechanism according to any one of claims 1-9.

11. The endoscope according to claim 10, wherein, The endoscope further includes a holding and operating assembly. The proximal end of the intubation tube is installed in the holding and operating assembly, and an instrument channel communicating with the first lumen of the intubation tube is arranged in the holding and operating assembly.

12. The endoscope according to claim 11, wherein, The holding and operating assembly includes a housing, a knob, a support sleeve, and a rear guide sleeve. The support sleeve is rotatably installed inside the housing. The support sleeve is fixedly sleeved on the proximal end of the intubation tube. The rear guide sleeve passes through the housing and is fixedly connected to the knob. The knob is located outside the housing, and the knob is used to control the rotation angle of the intubation tube.

13. The endoscope according to claim 12, wherein, The proximal end of the inner tube is located outside the support sleeve, the proximal end of the outer tube is located inside the support sleeve, a support tube is fixedly sleeved on the proximal end of the inner tube, one end of the support tube is inserted into the support sleeve, and the other end is fixed in the rear guide sleeve.

14. The endoscope according to claim 13, wherein, A through hole is provided in the rear guide sleeve, and the through hole is communicated with the inside of the support tube to form an instrument channel.

15. The endoscope according to claim 12, wherein, A water injection connecting tube is connected to the support sleeve, the water injection connecting tube is communicated with the second lumen, a water injection pipe is connected to the water injection connecting tube, a drainage connecting tube is connected to the rear guide sleeve, a drainage pipe is connected to the drainage connecting tube, and the drainage connecting tube is communicated with the instrument channel.

16. The endoscope according to claim 12, wherein, The support sleeve includes a front sleeve and a rear sleeve fixedly connected. A plurality of steel ball grooves are circumferentially and equidistantly arranged on the outer wall of the front sleeve. A steel ball column is fixed to the inner wall of the housing corresponding to the position of the front sleeve, and a movable steel ball is placed in the steel ball column.

17. The endoscope according to claim 16, wherein, A spring is installed between the steel ball column and the steel ball.

18. The endoscope according to claim 17, wherein, A limiting column is fixed on the outer wall of the front sleeve, and a clamping block is further installed on the inner wall of the housing. The clamping block is used to limit the infinite rotation of the limiting column.

19. The endoscope according to claim 13, wherein, A sealing seat is installed between the support tube and the support sleeve. A first sealing ring and a retaining ring are arranged in the sealing seat, and both the first sealing ring and the retaining ring are sleeved on the support tube.

20. The endoscope according to claim 14, wherein, A second sealing ring and a retaining ring are installed in the rear guide sleeve near the knob. The retaining ring is located outside the second sealing ring, and both the second sealing ring and the retaining ring are provided with through holes.

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