Hysteroscope insertion mechanism and hysteroscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to a hysteroscope insertion mechanism and a hysteroscope, the hysteroscope insertion mechanism comprises an intubation tube assembly and a lens assembly, the intubation tube assembly comprises an outer tube and an inner tube which is arranged inside the outer tube in a sliding and penetrating mode, and an elastic piece is arranged at one end, close to the lens assembly, of the inner tube. One end of the elastic sheet and the inner tube are integrally formed, and the other end of the elastic sheet is connected to the lens assembly; the inner tube slides in the direction away from the lens assembly to drive the lens assembly to move to be partially inserted into the outer tube, or the inner tube slides in the direction close to the lens assembly to drive the lens assembly to move and extend out of the outer tube, and at the moment, the lens assembly can be lifted by the inserted working apparatus; when the lens assembly is partially inserted into the outer tube, the outer wall of the lens assembly is flush with the outer wall of the outer tube. The radial size of the hysteroscope insertion mechanism can be flexibly adjusted, the radial size of the plug part of the insertion mechanism can be adjusted only by moving the inner tube, and the hysteroscope insertion mechanism is convenient and flexible to use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a hysteroscope insertion mechanism and a hysteroscope. Background Art

[0002] Hysteroscopy is a medical device used to examine and treat problems within the female reproductive system. Hysteroscopy is minimally invasive and causes less trauma, less pain, and a faster recovery time than traditional laparotomy. Hysteroscopy is widely used in the field of gynecology and is often used to diagnose and treat problems such as infertility, abnormal uterine bleeding, and endometriosis.

[0003] A hysteroscope generally includes a handle, an insertion tube, and a lens assembly. The handle and the lens assembly are respectively installed at opposite ends of the insertion tube. The handle controls the rotation of the insertion tube so that the lens assembly can obtain a larger viewing angle. The lens assembly is installed at the end of the insertion tube to form an insertion mechanism, and the lens assembly is used for visual detection of the uterine cavity. Among them, in the FPC version of the electronic hysteroscope, the lens assembly is connected to an external device through a flexible printed circuit (Flexible Printed Circuit, FPC for short) to transmit the image collected by the lens assembly to the external device. The hollow interior of the insertion tube can be used as an insertion channel for working instruments. If necessary, the working instrument is inserted to perform visualized surgical treatment.

[0004] The inner diameter of the insertion tube of the existing hysteroscope is small and its application range is narrow. Installing the lens assembly at the end of the insertion tube generally increases the outer diameter of the plug part of the insertion tube. However, due to the use environment where the opening of the cervical ostium is small, the plug part with a larger outer diameter may scratch the cervical ostium and cause secondary damage. If the radial dimension of the insertion tube is reduced, the insertion channel of the working instrument will inevitably become narrower. The narrow insertion channel of the working instrument will increase the difficulty of operation and reduce the efficiency of the operation. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a hysteroscope insertion mechanism and a hysteroscope, so as to at least solve the problem that the plug part with a larger outer diameter in the existing hysteroscope may scratch the cervical opening and cause secondary injury, and reducing the radial size of the insertion tube will inevitably narrow the insertion channel of the working instrument. The narrow working instrument insertion channel will increase the difficulty of operation and reduce the efficiency of the operation.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] In the first aspect, the utility model provides a hysteroscope insertion mechanism, including an insertion tube assembly and a lens assembly installed at one end of the insertion tube assembly, the insertion tube assembly including an outer tube and an inner tube slidably inserted into the outer tube, the inner tube having an elastic sheet at one end close to the lens assembly, one end of the elastic sheet being integrally formed with the inner tube, and the other end of the elastic sheet being connected to the lens assembly; the inner tube sliding in a direction away from the lens assembly can drive the lens assembly to move until it is partially inserted into the outer tube, or the inner tube sliding in a direction close to the lens assembly can drive the lens assembly to move and extend out of the outer tube, at which time the lens assembly can be lifted by a working instrument inserted from the inner tube; when the lens assembly is partially inserted into the outer tube, the outer wall of the lens assembly is aligned with the outer wall of the outer tube.

[0008] In combination with the first aspect, in some embodiments, the outer wall of the lens assembly has a step surface, and when the lens assembly is partially inserted into the outer tube, the step surface abuts against the end surface of the outer tube, and the end of the lens assembly close to the outer tube has an inclined surface.

[0009] In combination with the first aspect, in some embodiments, the outer wall of the lens assembly further has a mounting groove, the elastic sheet is fixedly installed in the mounting groove, and the mounting groove is located at the bottom of the inclined surface.

[0010] In combination with the first aspect, in some embodiments, the inner tube has a first notch at one end close to the lens assembly, the elastic sheet is connected to the first notch, and the inner tube also has a second notch, which is opposite to the first notch.

[0011] In combination with the first aspect, in some embodiments, a pressing block is installed on the outer wall of the inner tube at one end close to the lens assembly, and the pressing block is located on opposite sides of the first notch.

[0012] In combination with the first aspect, in some embodiments, a plastic sleeve is further sleeved on the inner tube, and the plastic sleeve is located inside the outer tube.

[0013] In combination with the first aspect, in some embodiments, the outer tube and the inner tube are eccentrically arranged, and the gap between the outer tube and the inner tube constitutes a tube cavity, and the tube cavity is used for water injection circulation channel and FPC cable passing channel, and the end of the outer tube close to the lens assembly has a plurality of through holes, and the through holes are connected to the tube cavity.

[0014] The radial dimension of the hysteroscope insertion mechanism of the utility model can be flexibly adjusted, and the radial dimension adjustment of the plug part of the insertion mechanism can be achieved by simply moving the inner tube, which is convenient and flexible to use. Specifically, the inner tube slides in the direction away from the lens assembly to drive the lens assembly to move to be partially plugged into the outer tube, and at this time, the outer wall of the lens assembly is flush with the outer wall of the outer tube, and the lens assembly is partially hidden in the outer tube to reduce the radial dimension of the plug end of the insertion mechanism, which is suitable for the insertion mechanism to be inserted into the uterine cavity or taken out from the uterine cavity to avoid secondary damage; the inner tube slides in the direction close to the lens assembly to drive the lens assembly to move and extend out of the outer tube, and at this time, the working instrument can be inserted along the inner tube, and the working instrument extends from the outer tube and lifts the lens assembly.

[0015] The hysteroscope insertion mechanism of the utility model solves the problem that the plug part of the existing hysteroscope with a larger outer diameter may scratch the cervical opening and cause secondary injury, and reducing the radial size of the insertion tube will inevitably narrow the insertion channel of the working instrument. The narrow working instrument insertion channel will increase the difficulty of operation and reduce the efficiency of the operation.

[0016] In a second aspect, the utility model provides a hysteroscope, comprising the hysteroscope insertion mechanism described in the first aspect.

[0017] In combination with the second aspect, in some embodiments, the hysteroscope also includes a handle assembly, the handle assembly includes an outer shell, a front support sleeve and a rear support sleeve, the front support sleeve is rotatably installed inside the outer shell, the rear support sleeve is slidably inserted into the outer shell and is connected to a knob on the outside of the outer shell, the knob is used to control the rotation angle of the outer tube and the inner tube, one end of the outer tube away from the lens assembly is fixedly inserted in the front support sleeve, one end of the inner tube away from the lens assembly passes through the front support sleeve and is inserted in the rear support sleeve, a connecting tube is connected between the front support sleeve and the rear support sleeve, the connecting tube is sleeved on the inner tube, a first spring is sleeved on the connecting tube, and the first spring is located between the front support sleeve and the rear support sleeve; the outer shell has a dial button above the knob, and the outer wall of the rear support sleeve has a snap ring, and the outer shell has a slot on the side where the rear support sleeve passes through, and when the rear support sleeve moves relative to the outer shell, the snap ring can be embedded in the slot, and the dial button can control the slot to move up and down.

[0018] In the hysteroscope of the utility model, when the lens assembly extends out of the outer tube, the end face of the retaining ring abuts against the inner wall of the outer shell, and the first spring is in a compressed state. When it is necessary to slide the inner tube until the lens assembly is partially hidden in the outer tube, the dial button is turned, and under the action of the restoring force of the first spring, the rear support sleeve slides until the retaining ring is embedded in the retaining groove, and the sliding of the rear support sleeve drives the inner tube to slide, thereby driving the lens assembly to be partially inserted in the outer tube. When it is necessary to move the lens assembly outside the outer tube, the rear support sleeve is pressed until the rear support sleeve cannot slide. In this process, the rear support sleeve drives the inner tube to slide, and the sliding of the inner tube drives the lens assembly to move outside the outer tube.

[0019] In combination with the second aspect, in some embodiments, the front support sleeve has a first cavity inside, and the first cavity is connected to the gap between the inner tube and the outer tube. The front support sleeve has a wire harness outlet, and the wire harness outlet is used for the FPC cable to pass through. The wire harness outlet is connected to the first cavity, and the front support sleeve is also connected to a first inlet and outlet water pipe, and the first inlet and outlet water pipe is connected to the first cavity; a negative pressure inlet guide sleeve is installed in the rear support sleeve, and the rear support sleeve has a second cavity inside, and the second cavity is connected to the hollow interior of the inner tube. The rear support sleeve is connected to a second inlet and outlet water pipe, and the second inlet and outlet water pipe is connected to the second cavity.

[0020] The hysteroscope of the utility model can realize water injection and flushing and liquid suction of the surgical site through the first water inlet and outlet pipes and the second water inlet and outlet pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the lens assembly of Example 1 in a partially hidden state;

[0022] Figure 2 is a structural schematic diagram of the lens assembly of Example 1 in a lifted state;

[0023] Figure 3 is a cross-sectional view of the lens assembly of Example 1 in a partially hidden state;

[0024] Figure 4 is an enlarged structural schematic diagram of the lens assembly of Example 1;

[0025] Figure 5 is a partially enlarged structural schematic diagram of the inner tube of Example 1;

[0026] Figure 6 is a schematic diagram of the structure of the handle assembly when the lens assembly is in a partially hidden state;

[0027] Figure 7 is a schematic diagram of the structure of the handle assembly when the lens assembly is in a raised state;

[0028] Figure 8is a cross-sectional view of the connection structure between the hysteroscope insertion mechanism and the front support sleeve and the rear support sleeve of Example 2;

[0029] Fig. 9 is a partial cross-sectional view of the handle assembly of Example 2;

[0030] Fig.10 is a schematic structural diagram of the front support sleeve of Example 2;

[0031] Fig.11 is a schematic structural diagram of the rear support sleeve of Example 2;

[0032] Among them, lumen 0, cannula assembly 100, outer tube 110, through hole 111, inner tube 120, elastic sheet 121, first notch 122, second notch 123, pressing block 130, plastic sleeve 140, lens assembly 200, lens seat 210, step surface 211, inclined surface 212, mounting groove 213, lens module 220, LED lamp 230, FPC cable 240, housing 310, dial button 311, card slot 312, steel ball column 313 , steel ball 314, second spring 315, block 316, front support sleeve 320, first cavity 321, wiring harness outlet 322, first water inlet and outlet pipe 323, steel ball groove 324, limit column 325, rear support sleeve 330, knob 331, snap ring 332, second cavity 333, second water inlet and outlet pipe 334, connecting pipe 340, first spring 350, negative pressure inlet guide sleeve 360, three-way interface 370, support seat 380, sealing ring 381. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0034] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Example 1

[0036] Please refer to Figure 1-5 This embodiment describes a hysteroscope insertion mechanism, including an insertion tube assembly 100 and a lens assembly 200 installed at one end of the insertion tube assembly 100, wherein the insertion tube assembly 100 includes an outer tube 110 and an inner tube 120 slidably inserted into the outer tube 110, and the inner tube 120 is connected to the lens assembly 200 and used to move the lens assembly 200. An elastic sheet 121 is provided at one end of the inner tube 120 close to the lens assembly 200, one end of the elastic sheet 121 is integrally formed with the inner tube 120, and the other end of the elastic sheet 121 is connected to the lens assembly 200. The inner tube 120 slides away from the lens assembly 200 to drive the lens assembly 200 to move to be partially inserted into the outer tube 110, and the inner tube 120 slides toward the direction close to the lens assembly 200 to drive the lens assembly 200 to move and extend out of the outer tube 110, at which time, the lens assembly can be lifted by the working instrument inserted from the inner tube 120. When the lens assembly 200 is partially inserted into the outer tube 110 , the outer wall of the lens assembly 200 is aligned with the outer wall of the outer tube 110 .

[0037] In this embodiment, when the inner tube 120 slides toward the direction close to the lens assembly 200 to drive the lens assembly 200 to move and extend out of the outer tube 110, the elastic sheet 121 has two possible states at this time. One is that the elastic sheet 121 itself has a large elastic force. After the lens assembly 200 extends out of the outer tube 110, the elastic sheet 121 returns to a straight state and lifts the lens assembly 200; the other is that the elastic sheet 121 itself has a small elastic force. After the lens assembly 200 extends out of the outer tube 110, the elastic sheet 121 is still in a deformed and lying state. At this time, the lens assembly 200 can be lifted by a working tool inserted from the inner tube.

[0038] Please refer to Figure 3The lens assembly 200 is used to obtain an image of the interior of the uterus. The lens assembly 200 includes a lens mount 210, a lens module 220, at least one LED light 230 and an FPC cable 240. The lens module 220 generally includes a camera capable of taking pictures, which is used to take images of the interior of the uterus. The lens mount 210 is used to install and fix the lens module 220 and is connected to the inner tube 120. The FPC cable 240 is connected to the lens module 220. The FPC cable 240 passes through the lens mount 210 and is arranged above the elastic sheet 121. The LED light 230 is arranged on the outer circumference of the lens module 220 to illuminate the interior of the uterus so as to obtain a clearer image of the interior of the uterine cavity.

[0039] Please refer to Figure 4 In order to better achieve the plug-in fit between the lens assembly 200 and the outer tube 110, the outer wall of the lens assembly 200 has a step surface 211. When the lens assembly 200 is partially plugged into the outer tube 110, the step surface 211 abuts against the end surface of the outer tube 110. In order to better insert the lens assembly 200 into the outer tube 110, the end of the lens assembly 200 close to the outer tube 110 has an inclined surface 212. When the lens assembly 200 moves into the inner part of the outer tube 110, the end of the lens assembly 200 close to the outer tube 110 gradually inserts into the outer tube 110 along the inclined surface 212. The outer wall of the lens assembly 200 also has a mounting groove 213, and the elastic sheet 121 is fixedly mounted in the mounting groove 213. The mounting groove 213 is located at the bottom of the inclined surface 212. Specifically, the step surface 211 is located on the outer wall of the lens holder 210, and the mounting groove 213 is also located on the outer wall of the lens holder 210.

[0040] Please refer to Figure 5 In order to allow the elastic sheet 121 to deform and move better, the inner tube 120 has a first notch 122 at one end close to the lens assembly 200, and the elastic sheet 121 is connected to the first notch 122. In order to allow the elastic sheet 121 to move in a larger range so that the lens assembly 200 can be better inserted into the outer tube 110, the inner tube 120 also has a second notch 123, and the second notch 123 is opposite to the first notch 122.

[0041] A pressing block 130 is installed on the outer wall of the inner tube 120 near the end of the lens assembly 200, and the pressing block 130 is located on opposite sides of the first notch 122. A plastic sleeve 140 is also sleeved on the inner tube 120, and the plastic sleeve 140 is located inside the outer tube 110. The plastic sleeve 140 can support the inner tube 120. In addition, the plastic sleeve 140 and the pressing block 130 can provide a good sealing effect on the tube wall of the inner tube 120.

[0042] The outer tube 110 and the inner tube 120 are both long, tubular components, and the sizes of the two are sufficient to pass through the cervix and enter the uterus. The outer tube 110 and the inner tube 120 are eccentrically arranged, and the gap between the outer tube 110 and the inner tube 120 constitutes the lumen 0. The side with the larger gap between the eccentrically arranged inner tube 120 and the outer tube 110 serves as the main channel of the lumen 0. The lumen 0 channel obtained by the eccentric setting is wider, which is conducive to the smooth passage of water injection and FPC cable. The lumen 0 is used for water injection circulation channel and FPC cable passing channel. The end of the outer tube 110 close to the lens assembly 200 has a plurality of through holes 111, which are connected to the lumen 0, and the through holes 111 are used as through holes 111 for injecting water into the uterine cavity. The through holes 111 are located at the position where the plastic sleeve 140 is located to prevent a large amount of liquid in the lumen 0 from flowing into the inner tube 120. Of course, the lumen 0 can also be used as a liquid suction circulation channel. In this case, the through hole 111 becomes a water inlet. Under the action of suction, the waste liquid in the uterine cavity is sucked from the through hole 111 into the lumen 0. The hollow interior of the inner tube 120 is used to form a channel for the working instrument to pass through and enter the uterus.

[0043] When the hysteroscope insertion mechanism of the utility model needs to lift the lens assembly 200 inserted in the outer tube 110 to be separated from the outer tube 110, the movement of the lens assembly 200 is achieved by moving the inner tube 120. The lens assembly 200 can be lifted by the deformation recovery force of the elastic sheet 121, or the lens assembly 200 can be pushed out by a working device to be separated from the outer tube 110 and in a lifted state. However, no matter which method is used to achieve the movement of the lens assembly 200, the inner tube 120 will move, but the former is to actively move the inner tube 120, and the latter is to passively move the inner tube 120.

[0044] The radial dimension of the hysteroscope insertion mechanism of the utility model can be flexibly adjusted, and the radial dimension adjustment of the plug part of the insertion mechanism can be achieved by simply moving the inner tube 120, which is convenient and flexible to use. Specifically, the inner tube 120 slides in the direction away from the lens assembly 200 to drive the lens assembly 200 to move to be partially plugged into the outer tube 110, and at this time, the outer wall of the lens assembly 200 is flush with the outer wall of the outer tube 110, and the lens assembly 200 is partially hidden in the outer tube 110 to reduce the radial dimension of the plug end of the insertion mechanism, which is suitable for the insertion mechanism to be inserted into the uterine cavity or taken out from the uterine cavity to avoid secondary injury; the inner tube 120 slides in the direction close to the lens assembly 200 to drive the lens assembly 200 to move and extend out of the outer tube 110, and at this time, the working instrument can be inserted along the inner tube 120, and the working instrument extends from the outer tube 110 and lifts the lens assembly 200 to perform surgery.

[0045] Example 2

[0046] Please refer to Figure 6-11This embodiment describes a hysteroscope, including the hysteroscope insertion mechanism of embodiment 1, and also includes a handle assembly, the handle assembly includes a shell 310, a front support sleeve 320 and a rear support sleeve 330. The front support sleeve 320 is rotatably mounted inside the shell 310, and the rear support sleeve 330 is slidably arranged in the shell 310 and connected to a knob 331 on the outside of the shell 310, and the knob 331 is used to control the rotation angle of the outer tube 110 and the inner tube 120. One end of the outer tube 110 away from the lens assembly 200 is fixedly inserted in the front support sleeve 320, and the other end of the inner tube 120 away from the lens assembly 200 passes through the front support sleeve 320 and is inserted in the rear support sleeve 330. A connecting tube 340 is connected between the front support sleeve 320 and the rear support sleeve 330. The connecting tube 340 is sleeved on the inner tube 120. A first spring 350 is sleeved on the connecting tube 340, and the first spring 350 is located between the front support sleeve 320 and the rear support sleeve 330; the outer shell 310 has a dial button 311 above the knob 331, and a snap ring 332 is provided on the outer wall of the rear support sleeve 330. The outer shell 310 is provided with a slot 312 on the side through which the rear support sleeve 330 passes. When the rear support sleeve 330 moves relative to the outer shell 310, the snap ring 332 can be embedded in the slot 312, and the dial button 311 can control the slot 312 to move up and down.

[0047] When the inner tube 120 needs to be slid to the outside of the outer tube 110, the end face of the retaining ring 332 abuts against the inner wall of the outer shell 310, and the first spring 350 is in a compressed state. When the inner tube 120 needs to be slid to the inside of the outer tube 110 so that the lens assembly 200 is partially hidden, the dial button 311 is turned, and the retaining ring 332 is separated from the inner wall of the outer shell 310. Under the restoring force of the first spring 350, the rear support sleeve 330 slides until the retaining ring 332 is embedded in the card groove 312. The sliding of the rear support sleeve 330 drives the inner tube 120 to slide in the outer tube 110, thereby driving the lens assembly 200 to be partially inserted in the outer tube 110. When the lens assembly 200 needs to be moved outside the outer tube 110, the rear support sleeve 330 is pressed until the rear support sleeve 330 cannot slide. In this process, the rear support sleeve 330 drives the inner tube 120 to slide, and the sliding of the inner tube 120 drives the lens assembly 200 to move away from the outer tube 110.

[0048] The front support sleeve 320 has a first cavity 321 inside, and the first cavity 321 is connected to the gap between the inner tube 120 and the outer tube 110. The front support sleeve 320 has a harness outlet 322, and the harness outlet 322 is used for the FPC cable to pass through and seal, and the harness outlet 322 is connected to the first cavity 321. The front support sleeve 320 is also connected to a first water inlet and outlet pipe 323, and the first water inlet and outlet pipe 323 is connected to the first cavity 321. The rear support sleeve 330 is installed with a negative pressure inlet guide sleeve 360, and the negative pressure inlet guide sleeve 360 ​​is used for the working equipment to pass through and seal the second cavity 333. The rear support sleeve 330 has a second cavity 333 inside, and the second cavity 333 is connected to the hollow interior of the inner tube 120. The rear support sleeve 330 is connected to a second water inlet and outlet pipe 334, and the second water inlet and outlet pipe 334 is connected to the second cavity 333.

[0049] When the lumen 0 is used as a water injection channel, the first water inlet and outlet pipe 323 is connected to the external water injection mechanism to inject water into the first cavity 321. The water injected into the first cavity 321 then flows to the lumen 0 and flows into the uterine cavity from the through hole 111 of the outer tube 110. When the liquid in the uterine cavity needs to be extracted, the second water inlet and outlet pipe 334 is connected to the external suction mechanism, and the liquid in the uterine cavity enters the second cavity 333 from the inside of the inner tube 120 and then is discharged from the second water inlet and outlet pipe 334 to achieve water injection and liquid suction of the surgical site. A three-way interface 370 is installed on the first water inlet and outlet pipe 323, and the three-way interface 370 is connected to a pressure sensor through a pipeline for detecting water pressure.

[0050] One end of the connecting tube 340 is inserted into the front supporting sleeve 320, and a supporting seat 380 is installed between the front supporting sleeve 320 and the connecting tube 340. A sealing ring 381 is also sleeved between the supporting seat 380 and the connecting tube 340. The supporting seat 380 plays a supporting role and also plays a sealing role for the first cavity 321.

[0051] A plurality of steel ball grooves 324 are arranged equidistantly in the circumferential direction on the outer wall of one end of the front support sleeve 320, and a steel ball column 313 is fixed on the inner wall of the housing 310 corresponding to the position of the front support sleeve 320, and a movable steel ball 314 is placed in the steel ball column 313, and a second spring 315 is installed between the steel ball column 313 and the steel ball 314. When the front support sleeve 320 rotates, when the steel ball groove 324 and the steel ball 314 are opposite in position, a part of the steel ball 314 will be located in the steel ball groove 324, and when the steel ball groove 324 and the steel ball 314 are misaligned, the steel ball 314 will be completely located in the steel ball column 313, and a certain damping gear sense is formed for the rotation of the front support sleeve 320 through the cooperation of the steel ball groove 324 and the steel ball 314.

[0052] Since there are connecting pipes and FPC cables inside the shell 310, if the front support sleeve 320 rotates unlimitedly, it will affect the connecting pipes and the FPC cables. In order to avoid the unlimited 360° rotation of the front support sleeve 320, a limiting column 325 is fixed on the outer wall of the front support sleeve 320, and a clamping block 316 is also installed on the inner wall of the shell 310. The clamping block 316 is used to limit the unlimited rotation of the limiting column 325, thereby limiting the unlimited rotation of the front support sleeve 320.

[0053] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A hysteroscope insertion mechanism, comprising an insertion tube assembly and a lens assembly mounted at one end of the insertion tube assembly, characterized in that: The cannula assembly comprises an outer tube and an inner tube slidably inserted into the outer tube, the inner tube has an elastic sheet at one end close to the lens assembly, one end of the elastic sheet is integrally formed with the inner tube, and the other end of the elastic sheet is connected to the lens assembly; The inner tube slides away from the lens assembly to drive the lens assembly to be partially inserted into the outer tube, or the inner tube slides toward the lens assembly to drive the lens assembly to move and extend out of the outer tube, and the lens assembly can be lifted by the working tool inserted from the inner tube; When the lens assembly is partially inserted into the outer tube, the outer wall of the lens assembly is aligned with the outer wall of the outer tube.

2. The hysteroscope insertion mechanism according to claim 1, characterized in that: The outer wall of the lens assembly is provided with a step surface. When the lens assembly is partially inserted into the outer tube, the step surface abuts against the end surface of the outer tube. The end of the lens assembly close to the outer tube is provided with an inclined surface.

3. The hysteroscope insertion mechanism according to claim 2, characterized in that: The outer wall of the lens assembly is also provided with a mounting groove, the elastic sheet is fixedly mounted in the mounting groove, and the mounting groove is located at the bottom of the inclined surface.

4. The hysteroscope insertion mechanism according to claim 1, characterized in that: The inner tube has a first notch at one end close to the lens assembly, the elastic sheet is connected to the first notch, and the inner tube also has a second notch, which is opposite to the first notch.

5. The hysteroscope insertion mechanism according to claim 4, characterized in that: A pressing block is installed on the outer wall of the inner tube at one end close to the lens assembly, and the pressing block is located on two opposite sides of the first notch.

6. The hysteroscope insertion mechanism according to claim 5, characterized in that: The inner tube is also sleeved with a plastic sleeve, and the plastic sleeve is located inside the outer tube.

7. The hysteroscope insertion mechanism according to claim 1, characterized in that: The outer tube and the inner tube are eccentrically arranged, and the gap between the outer tube and the inner tube constitutes a tube cavity, and the tube cavity is used for the water filling circulation channel and the FPC cable passing channel. The end of the outer tube close to the lens assembly has a plurality of through holes, and the through holes are connected to the tube cavity.

8. A hysteroscope, characterized in that It comprises a hysteroscope insertion mechanism as described in any one of claims 1-7.

9. The hysteroscope according to claim 8, characterized in that: The hysteroscope further comprises a handle assembly, which comprises a shell, a front support sleeve and a rear support sleeve, wherein the front support sleeve is rotatably mounted inside the shell, and the rear support sleeve is slidably arranged inside the shell and is connected to a knob on the outside of the shell, wherein the knob is used to control the rotation angle of the outer tube and the inner tube. One end of the outer tube away from the lens assembly is fixedly inserted in the front support sleeve, and one end of the inner tube away from the lens assembly passes through the front support sleeve and is inserted in the rear support sleeve. A connecting tube is connected between the front support sleeve and the rear support sleeve, and the connecting tube is sleeved on the inner tube. A first spring is sleeved on the connecting tube, and the first spring is located between the front support sleeve and the rear support sleeve; The shell has a dial button above the knob, the outer wall of the rear support sleeve has a clamping ring, and the shell has a clamping groove on the side through which the rear support sleeve passes. When the rear support sleeve moves relative to the shell, the clamping ring can be embedded in the clamping groove, and the dial button can control the up and down movement of the clamping groove.

10. The hysteroscope according to claim 9, characterized in that: The front support sleeve has a first cavity inside, the first cavity is connected to the gap between the inner tube and the outer tube, the front support sleeve has a harness outlet, the harness outlet is used for the FPC cable to pass through, the harness outlet is connected to the first cavity, and the front support sleeve is also connected to a first water inlet and outlet pipe, the first water inlet and outlet pipe is connected to the first cavity; A negative pressure inlet guide sleeve is installed in the rear support sleeve, and a second cavity is provided inside the rear support sleeve, and the second cavity is communicated with the hollow interior of the inner tube. A second inlet and outlet water pipe is connected to the rear support sleeve, and the second inlet and outlet water pipe is communicated with the second cavity.

Images