CN107088043B - Disposable medical endoscope - Google Patents

Abstract

A disposable medical endoscope includes a bending part, a connecting part, and a handwheel control part. The bending part includes a proximal joint, an articulated ring group, and a distal joint. The handwheel control part includes a first handwheel assembly, a second handwheel assembly, and a winding assembly for driving the bending assembly. One end of the first control cable is wound around the first control wheel, and the other end is connected to the bending part. One end of the second control cable is wound around the second control wheel, and the other end is connected to the bending part. The first handwheel assembly controls the movement of the first control wheel, and the second handwheel assembly controls the movement of the second control wheel. Multiple articulated rings prepared by injection molding are hinged to each other. The articulated rings are designed with an open mounting groove. The articulated shaft can be smoothly installed in the mounting groove through plastic changes, so that the articulated rings are hinged in pairs. Two control cables are distributed around two control wheels, which can control four directions. The bending angle is controllable through the handwheel control part, and the reliability is high.

Description

A disposable medical endoscope

Technical Field

The invention belongs to the technical field of endoscopes, and in particular relates to a disposable medical endoscope.

Background Art

An endoscope is a commonly used medical device, which consists of an insertion part, a bending part and a front end part arranged at the front end of the operating part, wherein the insertion part, the bending part and the front end part are collectively called an insertion tube. It enters the human body through the natural channels of the human body or through a small incision made during surgery; when in use, the insertion tube of the endoscope is introduced into the organ to be examined, and the changes of the relevant parts can be directly observed.

Endoscopes are delicate medical devices. Most of the domestic medical endoscope market is occupied by foreign products, with prices ranging from tens of thousands to hundreds of thousands. After each use, they need to be disinfected and maintained in a complex and costly manner, and there is a possibility of cross infection due to non-standard disinfection procedures. Traditional endoscope insertion tubes are equipped with air/water supply channels, suction channels, biopsy channels, control cables, signal cables, and optical fibers. It is very difficult to thoroughly disinfect the long and narrow channel, but due to the high cost of manufacturing endoscopes, they must be reused. It is necessary to improve traditional endoscopes to reduce costs and the risk of cross infection.

Later, disposable products gradually appeared. The Chinese invention patent "501110056640.0" discloses "a purified medical endoscope", whose structure is: it includes a soft overall outer shell of an endoscope, an endoscope body is arranged inside the soft overall outer shell of the endoscope, and the endoscope body is made of medical resin material to wrap the imaging lens assembly, LED light source and optical fiber light guide, power cord and signal line together, and various channels are arranged inside the endoscope body.

The above technology has the following problems: the whole is made of medical resin or soft material, which has poor rigidity and cannot directly reach the affected area when used, and the bending angle is small and the application range is narrow. The endoscope body and the soft overall shell of the endoscope still need to be disinfected and sterilized, and it has not achieved true disposable use.

Chinese invention patent "200880017615.8" discloses "an endoscope bending portion", which includes a plurality of node rings (26A, 26B) having a cylindrical portion (28) and coaxially arranged in parallel with each other, one node ring (26A) of two adjacent node rings (26A, 26B) having a protrusion (32) integrally arranged with the cylindrical portion (28) and extending in the radial direction of the cylindrical portion (28), the other node ring (26B) of the two adjacent node rings (26A, 26B) having a receiving portion (42) integrally arranged with the cylindrical portion (28) and into which the protrusion (32) can be inserted rotatably around the longitudinal axis of the protrusion (32), and each node ring (26A, 26B) has a non-engaged or fully engaged discontinuous portion (34) extending in the cylindrical portion (28) in a direction intersecting the circumferential direction of the cylindrical portion (28).

The bending portion of an endoscope disclosed in the above invention patent has a complex structure, high manufacturing difficulty, high production cost, and does not meet the production requirements of a disposable endoscope.

The manufacturing of disposable endoscopes currently needs to solve two problems:

1. Cost. Traditional endoscopes cost hundreds of thousands of yuan, and the cost of each component is expensive, so it is impossible to discard them directly.

2. The disinfection problem of the working channel. Currently, there is no relevant technology that can thoroughly disinfect the slender pipes;

Therefore, in view of the problems existing in the prior art, it is urgent to provide a technology for a disposable medical endoscope with low production cost and reliable performance.

Summary of the invention

The purpose of the present invention is to avoid the shortcomings of the prior art and provide an endoscope with low production cost, reliable performance and disposable medical use.

Provided is a disposable medical endoscope, comprising an insertion assembly, a connection portion, and a hand wheel control portion, wherein the insertion assembly comprises a curved portion, a front end portion, a working channel, and a jacket arranged at the front end of the control portion, wherein a portion of the working channel is arranged in the connection portion, and another portion passes through the curved portion and is connected to the front end portion, wherein the working channel is arranged to be a working channel integrating air intake, water intake, negative pressure suction, and biopsy; the jacket covers the curved portion and the front end portion, and the proximal end of the jacket is sealed and connected to the connection portion;

The bending part is provided with a support assembly, which includes a proximal joint, a hinge ring group and a distal joint. One end of the distal joint is connected to the front end, and the other end is connected to the upper end of the hinge ring group. One end of the proximal joint is connected to the lower end of the hinge ring group, and the other end is fixedly connected to the outer sleeve.

The handwheel control part includes a first handwheel assembly, a second handwheel assembly, and a winding assembly for driving a bending assembly; the winding assembly includes a first control wheel, a second control wheel, a first control cable and a second control cable; one end of the first control cable is wound around the first control wheel, and the other end passes through a connecting part, an articulated ring group and is fixedly connected to a distal joint in sequence; one end of the second control cable is wound around the second control wheel, and the other end passes through a connecting part, an articulated ring group and is fixedly connected to a distal joint in sequence; the first handwheel assembly controls the movement of the first control wheel, and the second handwheel assembly controls the movement of the second control wheel.

Wherein, the articulated ring group includes a plurality of articulated rings, and the plurality of articulated rings are articulated in pairs. Two first articulated ears are arranged along a first radial direction at one end of the articulated ring, and the first articulated ears are articulated to adjacent articulated rings. A second articulated ear is arranged along a second radial direction at the other end of the articulated ring, and the second articulated ear is articulated to an adjacent articulated ring. The first radial direction and the second radial direction are perpendicular to each other.

Among them, the outer ring groove is arranged on the outer wall of the upper end of the hinge ring, and the inner ring groove is arranged on the inner wall of the lower end. The first hinge ear is inserted into the inner ring groove of the adjacent hinge ring, and the second hinge ear is sleeved on the outer ring groove of the adjacent hinge ring.

Wherein, the first hinged ear is provided with a hinge shaft, and the second hinged ear is provided with a mounting groove, the mounting groove includes a hinge hole and a mounting channel for guiding the hinge shaft to be installed into the hinge hole, the entrance of the mounting channel is provided at the top or side of the hinged ear, and the exit of the mounting channel is provided at the hinge hole; a stopper is provided at the outer end of the hinge shaft, and the lateral or longitudinal dimension of the stopper is larger than the diameter of the hinge hole; the entrance width of the mounting groove is larger than the exit width of the mounting groove.

Among them, the inner wall of each hinge ring is provided with two threading holes for threading the control cable, and the threading holes are arranged opposite to each other. One end of the control cable is connected to the control part, and the other end is connected to the distal connector after passing through the threading hole.

Among them, the connecting part includes a pipeline shell, the proximal end of the outer sleeve is inserted into the outer shell, the outer sleeve and the outer shell are sealed and bonded by dissolving glue, the working channel is provided with an instrument interface, a water inlet interface, an air inlet interface and a negative pressure suction interface, and the water inlet interface, the air inlet interface and the negative pressure suction interface are respectively provided with solenoid valves.

Among them, the front end is provided with a light source camera assembly, a transparent heat insulation cover and a fixed tube, the light source camera assembly is provided with a light source, a camera and a PCB board, the light source, the camera and the PCB board are fixedly connected to the fixed tube, the fixed tube is provided with a working channel hole, and the working channel hole is arranged corresponding to the outlet of the working channel; the transparent heat insulation cover is arranged in front of the light source, the lower part of the transparent heat insulation cover is connected to the fixed tube, the observation surface of the transparent heat insulation cover is arranged in an arc shape, and the arc-shaped observation surface forms a heat-insulating cavity between the transparent heat insulation cover and the light source.

Wherein, the first control wheel and the second control wheel both include a winding ring and a driving disk for fixing the winding ring, the winding ring is provided with a plurality of openings for winding the control cable of the endoscope, the driving disk of the first control wheel is provided with a driving hole connected to the first handwheel assembly, and the driving disk of the second control wheel is provided with a driving hole connected to the second handwheel assembly.

Wherein, the first hand wheel assembly comprises a first linkage rod and a first hand wheel, one end of the first linkage rod is fixedly connected to the first hand wheel, and the other end is drivingly connected to the first control wheel;

The second handwheel assembly includes a second linkage rod and a second handwheel arranged outside the endoscope housing. The second linkage rod passes through the first handwheel, the first linkage rod and the first control wheel. One end of the second linkage rod is fixedly connected to the second handwheel, and the other end is drivingly connected to the second control wheel.

Wherein, a first locking assembly for locking the first hand wheel assembly and a second locking assembly for locking the second hand wheel assembly are provided.

The first locking assembly comprises a first locking disk, a spring sheet and a first locking member, wherein the first locking member is connected to the first hand wheel, one end of the spring sheet is fixed, and a coupling block is arranged at the other end, and the locking disk is arranged to drive the coupling block to couple with the locking member, and when the locking disk is rotated forward to the locking position, the locking disk drives the coupling block to couple with the locking member, and when the locking disk is reversed, the locking disk drives the coupling block to disengage from the locking member;

The second locking assembly includes a second locking piece, a connecting piece, and a second locking plate. One side of the connecting piece is connected to the second locking piece, and the other side is provided with a recessed position and a high position. The locking plate is provided with a pressing block, and the pressing block abuts against the recessed position or the high position. When the pressing block is in the recessed position, the connecting piece is separated from the second locking piece, and when the pressing block is in the high position, the connecting piece is connected to the second locking piece.

The beneficial effects of the present invention are as follows:

The bending part, the connecting part and the hand wheel control part of the present invention are made of plastic, which is low in cost. Compared with the metal structure in the prior art, the manufacturing cost is lower and it is easier to achieve disposable use.

The bending portion of the present invention adopts a plurality of hinged rings prepared by injection molding to be hinged to each other. The hinged ring is designed with an open installation groove. The hinge shaft is smoothly installed in the installation groove through plastic changes, so that the hinged rings are hinged in pairs to form a support assembly. The control cable is fixed by a winding wheel. Two threading holes are arranged in the hinged ring. After the adjacent hinged rings are hinged, the threading holes are distributed in a cross row, that is, the threading holes are distributed in four directions. One end of the control cable is fixed to the control theory, and the control cable is arranged around the control theory, that is, one control cable can control two relative directions. The two control cables of the present invention are distributed and arranged around two control wheels, which can control four directions. After combined control, the hinged ring group of the support assembly can be controlled to deflect at any angle and direction. It is controlled by a handwheel control unit, the bending angle is controllable, and the reliability is high.

The present invention also adopts a front-mounted camera mechanism, and utilizes an LED light source, a camera and a PCB board to replace the light-guiding fiber in the prior art, thereby greatly reducing the manufacturing cost of the front end portion; the insertion portion, the bending portion and the front end portion of the front end of the connecting portion can be conveniently removed as a whole through the detachable connecting mechanism of the connecting portion, and then discarded; the overall cost of the present invention is low, and the bending effect and image imaging effect are good, and it is suitable for a single patient or a single operation process, and then the whole is discarded, avoiding the high cost of disinfection of traditional endoscopes, cross contamination caused by incomplete disinfection and other problems, and at the same time, due to the low overall cost, it is suitable for wide promotion in major hospitals and grassroots hospitals, and improves the detection rate of related diseases.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a schematic structural diagram of a bending portion of the present invention.

FIG3 is a schematic diagram of the hinge ring structure of the present invention;

FIG4 is a schematic structural diagram of the threading hole of the hinge ring of the present invention;

FIG5 is a schematic structural diagram of a hinge ring according to Embodiment 2 of the present invention;

FIG6 is a schematic diagram of the hinge ring structure of Example 3 of the present invention;

FIG. 7 is a schematic structural diagram of a hinge ring according to Embodiment 4 of the present invention.

FIG8 is a schematic diagram of the structure of the working pipeline of the present invention.

FIG. 9 is a schematic diagram of the electrical control structure of the working pipeline of the present invention.

FIG. 10 is a schematic structural diagram of a hand wheel control unit of the present invention.

FIG. 11 is a schematic diagram of the structure of a handwheel of a handwheel control unit of the present invention.

FIG. 12 is an exploded view of the hand wheel control unit of the present invention.

FIG13 is a schematic diagram of the locking structure of the hand wheel control unit of the present invention.

FIG. 14 is a schematic diagram of another part of the locking structure of the hand wheel control portion of the present invention.

FIG. 15 is a schematic structural diagram of the winding wheel of the present invention.

1——Front end,

11——Camera assembly, 12——Transparent heat shield, 13——Fixed tube,

111——light source, 112——camera, 131——working channel hole,

2 - bending part, 21 - supporting assembly, 22 - control cable,

211——proximal joint, 212——articulated ring set, 213——distal joint,

2121 - first hinged ear, 2122 - hinged shaft, 2123 - second hinged ear, 2124 - hinged hole, 2125 - inner ring groove, 2126 - outer ring groove, 2127 - threading hole, 2128 - installation channel, 2129 - stopper,

3 – coat,

4——Working channel.

5——Connection

501 - housing, 502 - working channel, 503 - instrument interface, 504 - water inlet interface, 505 - air inlet interface, 506 - negative pressure suction interface, 507 - check solenoid valve, 508 - air inlet solenoid valve, 509 - waterproof solenoid valve, 510 - micro switch.

6——Handwheel control unit

62--First hand wheel assembly, 621--First hand wheel, 622--First linkage rod,

63--Second hand wheel assembly, 631--Second hand wheel, 632--Second linkage rod, 33--Countersunk hole,

64--winding assembly, 41--first control wheel, 42--second control wheel, 43--cable housing, 44--cable block, 411--winding ring, 412--driving hole, 413--driving disk, 441--cable slot

65--first locking assembly, 51--locking plate, 52--inner gear ring, 53--spring sheet 53, 54--first protrusion, 55--second protrusion, 56--stopper,

66--second locking assembly, 661--first end face gear ring, 662--connecting piece, 663--locking wheel, 664--spring, 665--slide rail, 6621--second end face gear ring,

67--Central axis.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

Example 1

A disposable medical endoscope, comprising an insertion assembly, a connecting portion 5, and a hand wheel control portion 6, as shown in FIGS. 1 to 7, the insertion assembly comprises a bending portion 2 arranged at the front end of the control portion, a front end portion 1, a working channel 4, and a jacket 3, wherein the jacket 3 covers the bending portion 2;

The bending portion 2 is provided with a support assembly 21, and the support assembly 21 includes a proximal joint 211, an articulated ring group 212 and a distal joint 213. One end of the distal joint 213 is connected to the front end portion 1, and the other end is connected to the articulated ring group 212. One end of the proximal joint 211 is connected to the articulated ring group 212, and the other end is connected to the endoscope control unit.

One end of the working channel 4 is connected to the hand wheel control part, and the other end passes through the curved part 2 and is connected to the front end part 1. The outer sleeve 3 covers the curved part 2 and the front end part 1, and is configured to integrate the working channel 4 for air supply, water supply, suction and biopsy;

The control cable 22 of the hand wheel control unit is sequentially passed through the proximal joint 211 and the hinge ring group 212, and connected to the distal joint 213. The control cable 22 is used to control the bending direction and angle of the support assembly 21;

The end of the power signal cable of the hand wheel control unit passes through the proximal connector 211 , the hinge ring group 212 , and the distal connector 213 , and is connected to the front end 1 .

The front end portion 1 is provided with a light source camera assembly 11, a transparent heat insulation cover 12 and a fixed tube 13, the light source camera assembly 11 and the transparent heat insulation cover 12 are fixed to the fixed tube 13, the light source camera assembly 11 is provided with two light sources 111, a camera 112 and a PCB board, the light source 111, the camera 112 and the PCB board are fixedly connected to the fixed tube, the fixed tube 13 is connected to the distal joint 213, the fixed tube 13 is provided with a working channel hole 131, and the working channel hole 131 is arranged corresponding to the outlet of the working channel 4.

The light source 111 is configured as an LED light source 111, the camera 112 includes a CMOS sensor and a lens, the lens is fixedly connected to the CMOS sensor, the CMOS sensor is fixedly connected to the PCB board and is signal-connected to the PCB board, and the lens is configured as an auto-focus lens.

The transparent heat insulation cover 12 is arranged in front of the light source 111, the lower part of the transparent heat insulation cover 12 is connected to the fixing tube 13, the lower outer side of the transparent heat insulation cover 12 is heat-pressed and sealed to the outer sleeve 3, and the observation surface of the transparent heat insulation cover 12 is arranged to be arc-shaped, and the arc-shaped observation surface forms an insulating cavity between the transparent heat insulation cover 12 and the light source 111.

The viewing surface of the transparent heat shield 12 is set to be arc-shaped. The arc-shaped viewing surface not only expands the range of viewing distance, but also improves the accuracy of the lens data collection. The arc-shaped viewing surface field can avoid scratching the human body, especially some easily broken affected parts. In addition, the transparent heat shield 12 can also increase the viewing distance. When the transparent heat shield 12 is tightly attached to the affected part, the lens can still clearly collect the image of the affected part.

The working channel 4 is provided with an air/water supply interface, a suction interface and a biopsy interface at the input end of the insertion component.

Example 2

The main technical scheme of this embodiment is basically the same as that of Embodiment 1 or Embodiment 2. The features not explained in this embodiment are explained in Embodiment 1 or Embodiment 2, and will not be described in detail here. The difference between this embodiment 1 and Embodiment 2 is:

As shown in Fig. 2 and Fig. 3, the hinge ring group 212 includes a plurality of hinge rings, which are hinged in pairs. Through the hinged connection, all the hinge rings are connected to form a complete hinge ring group 212. Two first hinge ears 2121 are arranged along the first radial direction at the upper end of the hinge ring, and the first hinge ears 2121 are hinged to the adjacent hinge rings. A second hinge ear 2123 is arranged along the second radial direction at the lower end of the hinge ring, and the second hinge ear 2123 is hinged to the adjacent hinge ring. The first radial direction is perpendicular to the second radial direction. The hinge ears and hinge holes are arranged in the horizontal direction and the vertical direction respectively. The axis line of the hinge shaft 2122 of the same hinge ring and the center line of the hinge hole 2124 are perpendicular to each other. Therefore, the swing directions of two adjacent hinges are perpendicular to each other. A universal connection can be formed by only three hinge rings, so that the universal bending of the hinge ring group 212 is realized.

By providing the first hinge ear 2121 and the second hinge ear 2123, the connection portion is made to protrude from the hinge ring. When the hinge ring group 212 is bent, adjacent hinge rings have a larger rotation space, and no jamming or collision will occur before rotating to a predetermined angle. The hinge ring group 212 has a larger bending angle, and when observed with an endoscope, the front end portion 1 can be bent at a desired angle.

Specifically, an arc-shaped recess is set at a relative position along the diameter of the upper end of the hinge ring, and a first hinge ear 2121 is formed between the two recesses. A hinge shaft 2122 is set on the outer side of the first hinge ear 2121, and an arc-shaped recess is set at a relative position along the diameter direction of the lower end of the hinge ring, and a second hinge ear 2123 is formed between the two recesses. The second hinge ear 2123 is set with a hinge hole 2124, and the axis line of the hinge shaft 2122 and the center line of the hinge hole 2124 are perpendicular to each other. When adjacent hinge rings are hinged, the hinge shaft 2122 is hinged with the hinge hole 2124. The function of the recess is to accommodate the rotation of the hinge ring so that the hinge ring has a larger rotation angle, that is, the hinge ring group 212 has a larger bending angle. In order to obtain a larger rotation space and bending angle, some endoscope insertion components have many hinged monomer hollow parts. After the hinge ring group 212 is bent, some control cables are tensioned and some control cables are loose, which may easily cause the loose control cables to extend out of the hinge ring group 212 and get stuck in the hinge ring group 212. The structure of the present invention has a larger bending angle, and the hinge rings are densely connected, the overall structure is compact, and there are few hollow parts. The control cables are surrounded by the hinge rings in most positions, and the loose control cables are not easy to extend out of the hinge rings, thereby providing a safe and reliable working environment for the control cables.

An outer ring groove 2126 is provided on the outer wall of the upper end of the hinge ring, and an inner ring groove 2125 is provided on the inner wall of the lower end. The first hinge ear 2121 is inserted into the inner ring groove 2125 of the adjacent hinge ring, and the second hinge ear 2123 is sleeved in the outer ring groove 2126 of the adjacent hinge ring. By providing the outer ring groove 2126 and the inner ring groove 2125, the adjacent hinge rings maintain structural consistency, the maximum diameter of the hinge ring group 212 is equal to the diameter of the hinge ring, and the side wall of the hinge ring group 212 is prevented from forming a convex structure, reducing the resistance of the hinge ring group 212 to insert, and at the same time reducing the vomiting reaction of the patient when the endoscope is inserted.

In this embodiment, the outer ring groove 2126 and the inner ring groove 2125 can be inverted, that is, the outer ring groove 2126 is set on the outer wall of the lower end of the hinge ring, and the inner ring groove 2125 is set on the inner wall of the upper end, the first hinge ear 2121 is sleeved outside the outer ring groove 2125 of the adjacent hinge ring, and the second hinge ear 2123 is inserted into the inner ring groove 2126 of the adjacent hinge ring. The inverted setting has the same technical effect as the above-mentioned non-inverted setting.

Two threading holes 2127 for threading the control cable are provided, and two adjacent hinged rings form four threading holes 2127 in the transverse and longitudinal directions, so that the control cable can be installed and fixed from four directions. One end of the control cable is connected to the control part, and the other end passes through the threading hole 2127 and is connected to the distal connector 213.

In the present embodiment, the first articulated ear 2121 and the second articulated ear 2123 will obviously protrude from the upper end surface and the lower end surface of the articulated ring. After the first articulated ear 2121 and the second articulated ear 2123 are respectively hinged to the adjacent articulated rings, a larger rotation space will be reserved. The adjacent hinges have a larger rotation space when rotating around the hinge point. The endoscope insertion assembly of the present embodiment has a larger bending angle and observation range.

The hinge ring of this embodiment is a plastic part. The production speed of plastic parts is fast and the cost is low compared to the snake-bone structure or variable-pitch spring made of metal. In addition, plastic parts have low recycling cost and strong regeneration ability, and are very suitable for disposable insertion components and disposable endoscopes.

Example 3

The main technical scheme of this embodiment is basically the same as that of Embodiment 1 or Embodiment 2. The features not explained in this embodiment are explained in Embodiment 1 or Embodiment 2, and will not be described in detail here. The difference between this embodiment 1 and Embodiment 2 is:

As shown in FIG4 , the difference between this embodiment and the second embodiment is that the first hinged ear 2121 is provided with a hinge shaft 2122, and the second hinged ear 2123 is provided with a mounting groove, the mounting groove includes a hinge hole 2124 and a mounting channel 2128 for guiding the hinge shaft 2124 to be installed in the hinge hole 2124, the mounting channel 2128 is vertically arranged, and the entrance of the mounting channel 2128 is arranged at the top of the second hinged ear 2123. In this embodiment, since the second hinged ear 2123 is invertedly arranged, its top is the lowest end of the second hinged ear 2123, and the outlet of the mounting channel 2128 is arranged at the lowest point of the hinge hole 2124. The axis of the hinge shaft 2122 is perpendicular to the center line of the hinge hole 2124. The hinge ring is quickly installed through the installation channel 2128, and the hinge shaft 2122 is guided by the installation channel 2128 to enter the hinge hole 2124 from the exit from the top of the second hinge ear 2123 along the installation channel 2128, so as to avoid the hinge ring being deformed by external force to allow the hinge shaft 2122 to be installed in the hinge hole 2124. In this embodiment, the installation channel 2128 is the shortest, the channel structure is simple, and the installation speed is fast.

In this embodiment, the inlet width of the installation channel 2128 is greater than the outlet width of the installation channel 2128. Increasing the inlet width facilitates the hinge shaft 2122 to enter the installation channel 2128, and reducing the width at the outlet prevents the hinge shaft 2122 from slipping out of the installation channel 2128.

A stopper 2129 is provided at the outer end of the hinge shaft 2122, and the transverse or longitudinal dimension of the stopper 2129 is larger than the diameter of the hinge hole 2124. In this embodiment, the stopper 2129 is a circular stopper 2129, and the diameter of the circular stopper 2129 is larger than the diameter of the hinge hole 2124. The hinge ring is a plastic part, which is deformable. When the insertion assembly is bent by controlling the control cable, the hinge ring is easily deformed, and there is a possibility that the hinge shaft 2122 is separated from the hinge hole 2124. In this embodiment, the diameter of the stopper 2129 is larger than the diameter of the hinge hole 2124, which limits the hinge shaft 2122 from sliding along the center line of the hinge hole 2124 due to the deformation of the hinge ring, and prevents the hinge shaft 2122 from slipping from the hinge hole 2124.

Example 4

The main technical scheme of this embodiment is basically the same as that of Embodiment 1 or Embodiment 2. The features not explained in this embodiment are explained in Embodiment 1 or Embodiment 2, and will not be described in detail here. The difference between this embodiment 1 and Embodiment 2 is:

As shown in Figure 5, compared with Example 2, the difference of this embodiment is that the mounting channel 2128 of this embodiment is inclined and is an inclined straight channel, the entrance of the mounting channel 2128 is arranged on the side of the second hinge ear 2123, and the exit of the mounting channel 2128 is arranged on one side of the line connecting the lowest point and the highest point of the hinge hole 2124, and the entrance and exit are arranged on the same side of the line connecting the lowest point and the highest point.

The second hinged ear 2123 includes two hinged ears arranged opposite to each other, and the directions of the mounting channels 2128 of the two hinged ears can be the same or opposite.

In this embodiment, since the exit position of the installation channel 2128 deviates from the highest point and the lowest point, the hinge shaft 2122 is not easy to slide out of the installation channel 2128 regardless of whether the insertion component is in a bent or straight state.

As shown in FIG6 , the mounting channel 2128 of this embodiment is hook-shaped, and the inlet and outlet of the mounting channel 2128 are arranged in the same manner. Since the mounting channel 2128 is bent, the mounting channel 2128 is perpendicular to the hole wall of the hinge hole 2124 at the outlet, and the opening width is smaller, making it less likely to slip out of the mounting channel 2128 than an oblique straight channel.

Example 5

As shown in Figures 8 and 9, one end of the connecting part 2 is connected to the bending part 2, and the other end is connected to the handwheel control part 6. The connecting part 2 includes a shell 501 and a working channel 4. A part of the working channel 4 is arranged in the connecting part 2, and the other part of the working channel 4 is arranged in the bending part 2. The proximal end of the outer sleeve 3 is inserted into the outer sleeve 501, and the outer sleeve 3 and the outer sleeve 501 are sealed and bonded by dissolving glue. The working channel 4 is provided with an instrument interface 503, a water inlet interface 504, an air inlet interface 505 and a negative pressure suction interface 506. The water inlet interface 504, the air inlet interface 505 and the negative pressure suction interface 506 are respectively provided with solenoid valves. The shell 501 of the present invention is sealed and bonded to the bending part 2 by dissolving glue. The outer cover 3 of the bending part 2 and the shell 501 are both made of Teflon material, which has low production cost and can be discarded as a whole without designing a complicated sealing structure. At the same time, the working channel 4 is provided with an instrument interface 503, a water inlet interface 504, an air inlet interface 505 and a negative pressure suction interface 506, which are opened and closed by an electromagnetic valve, have a simple structure and low production cost.

The solenoid valve of the water inlet interface 504 is set as a check solenoid valve 507 ; the solenoid valve of the negative pressure suction interface 506 is set as a waterproof solenoid valve 509 ; the solenoid valve of the air inlet interface 505 is set as an air inlet solenoid valve 508 .

The position setting of the mechanical valve has limitations, and the operation button depends on the position of the mechanical valve. The micro switch 510 has no direct positional relationship with the solenoid valve. The position of the micro switch 510 is set based on the convenience of operation. Compared with the mechanical control valve, the micro switch 510 of the present invention is more convenient to operate.

From the perspective of sealing, the operating button of the mechanical control valve has a direct mechanical connection with the valve core, the valve core has high design precision, high production cost, and has the problem of poor sealing. The solenoid valve in this embodiment controls the valve core through electromagnetic induction, has low production cost, and has better sealing than the mechanical control valve, which can effectively prevent water and accumulated liquid from leaking out. In addition, whether the solenoid valve is connected by wire or wireless, its setting position has more selectivity.

As shown in FIG. 3 , a PCB board, a controller and a micro switch 510 are provided; the PCB board is electrically connected to the controller, and the controller is electrically connected to the solenoid valve; the micro switch 510 is electrically connected to the PCB board, and an electrical signal for controlling the on/off of the solenoid valve is input to the controller.

Among them, there are three micro switches 510, including a water inlet switch, a drainage switch and an air intake switch. The water inlet switch is used to control the opening and closing of the solenoid valve of the water inlet interface 504; the drainage switch is used to control the opening and closing of the negative pressure suction interface 506, and the air intake switch is used to control the opening and closing of the air intake interface 505.

The controller receives the control signal input by the micro switch 510, and sends a response signal to the solenoid valve after identification and processing. The check solenoid valve 507, the waterproof solenoid valve 509, and the air intake solenoid valve 508 perform the conduction and closing actions.

The present invention controls the opening and closing of each interface of the working channel 4 through the micro switch 510, and has a fast response speed. Moreover, the solenoid valve can act instantly when receiving the response signal from the controller, and has a fast response speed.

The micro switch 510 is disposed at the proximal end of the housing 501 or at the hand wheel control part 6 .

Example 6

The present invention provides a handwheel control unit 6 as shown in Figures 10 to 15, which includes a shell 61, a first handwheel assembly 62, a second handwheel assembly 63, a winding assembly 64, a first locking assembly 65, a second locking assembly 66 and a central axis 67. A frustum 611 is provided on the outer surface of the side wall of the shell 61, and a mounting hole is provided that passes through the side wall of the shell 61 and the frustum 611. The second handwheel assembly 63 and the first handwheel assembly 62 are connected to the winding assembly 64 through the mounting hole.

As shown, the winding assembly 64 includes a first control wheel 641, a second control wheel 642 and a cable housing 643 for guiding the direction of the control cable. A circular cavity for installing the first control wheel 641 and the second control wheel 642 is provided at one end of the cable housing 643, and a cable block 644 is provided at the other end. The cable block 644 is provided with four cable slots 6441 arranged in a "田" shape. The circular cavity is provided with an opening downward, and the upper end opening of the cable slot 6441 is provided at the opening of the circular cavity. The second control wheel 642 and the first control wheel 641 are coaxially arranged side by side. Arranged in the circular cavity of the harness shell 643, two groups of control cables are respectively wound around the first control wheel 641 and the second control wheel 642, with both ends of one group of control cables passing through the first control wheel 641, and both ends of the other group of control cables passing through the second control wheel 642, forming four control cables. After the four control cables are passed through the winding cover, they respectively enter the harness groove 6441, which is used for passing and separating the control cables to avoid mutual interference between the control cables. The control cables pass through the harness groove 6441 and are connected to the insertion assembly of the endoscope.

The first control wheel and the second control wheel both include a winding ring 6411 and a driving disk 6413 for fixing the winding ring 412. The winding ring 6411 is provided with a plurality of openings for winding the control cable of the endoscope. The driving disk 6413 of the first control wheel is provided with a driving hole 6412 matching the first linkage rod 622, and the driving disk 6413 of the second control wheel 642 is provided with a driving hole 6412 matching the second linkage rod 632. When winding the control cable, any opening is selected to start winding the control cable. The control cable passes through the winding ring from the opening, passes through the adjacent opening, and then passes through another adjacent opening, and this cycle is repeated until the control cable is wound to a suitable position and passes through. Through this winding method, the friction between the control cable and the control wheel can be greatly increased to prevent the control cable from slipping.

The first hand wheel assembly 62 includes a first linkage rod 622 and a first hand wheel 621 disposed outside the endoscope housing 61, wherein one end of the first linkage rod 622 is fixedly connected to the first hand wheel 621, and the other end is drivingly connected to the first control wheel 641;

The second handwheel assembly 63 includes a second linkage rod 632 and a second handwheel 631 arranged outside the endoscope housing 61. The second linkage rod 632 passes through the first handwheel 621, the first linkage rod 622 and the first control wheel 641. One end of the second linkage rod 632 is fixedly connected to the second handwheel 631, and the other end is drivingly connected to the second control wheel 642.

The first locking assembly 65 includes a spring sheet 653, a locking disk 651 and a first locking member. The locking disk 651 is sleeved on the truncated platform 611. One end of the spring sheet 653 is obliquely inserted into the truncated platform 611 and fixed, and the other end is provided with a coupling block. In this embodiment, the first locking member can be an end face gear ring or an inner gear ring 652. The coupling block is coupled to the end face gear ring or the inner gear ring 652. This embodiment takes the inner gear ring 652 as an example for description.

The coupling block of the spring sheet 653 is arranged in the inner gear ring 652, and the locking plate 651 is arranged to drive the coupling block at the other end of the spring sheet 653 to be clamped into the first protrusion 654 of the inner gear ring 652, and is connected to the inner gear ring 652 through the coupling block. When the locking plate 651 is rotated to the connection position, the first protrusion 654 drives the coupling block to connect with the inner gear ring 652, locking the first hand wheel 621; when the locking plate 651 is turned over, the first protrusion 654 rotates in the opposite direction, and the spring sheet 653 returns to the initial position by its own elastic force, and the coupling block is separated from the inner gear ring 652.

However, the performance of the spring sheet 653 may decline after repeated use, and the friction between the spring sheet 653 and the inner gear ring 652 may be too large or the elastic force recovery may fail due to other reasons. In this embodiment, a second protrusion 655 may be provided to drive the other end of the spring sheet 653 to disengage from the inner gear ring 652. The first protrusion 654 and the second protrusion 655 are respectively provided on both sides of the spring sheet 653. The locking plate 651 rotates forward and the first protrusion 654 drives the connecting block of the spring sheet 653 to be inserted into the inner gear ring 652. The locking plate 651 rotates reversely, and the second protrusion 655 drives the other end of the spring sheet 653 to disengage from the inner gear ring 652. The other end of the spring sheet 653 is driven to disengage from the inner gear ring 652 by external force.

The truncated cone 611 is provided with a stopper 656 for limiting the rotation angle of the locking disk 651. The stopper 656 is provided at the position where the first protrusion 654 drives the spring sheet 653 to engage in the inner gear ring 652, i.e., the locking position. When the locking disk 651 moves to the locking position, the first protrusion 654 abuts against the other end of the spring sheet 653 and drives the spring sheet 653 to engage in the inner gear ring 652, and the locking disk 651 is reversed. The second protrusion 655 rotates with the locking disk 651, and the second protrusion 655 abuts against the spring sheet 653 and pushes the other end of the spring sheet 653 in the opposite direction, so that the other end of the spring sheet 653 is disengaged from the inner gear ring 652.

In the present embodiment, two sets of spring sheets 653 are provided, two sets of second protrusions 655 and first protrusions 654 for driving the spring sheets 653 are provided, and two blocks 656 are provided. The two sets of structures are arranged at relative positions along the diameter, and the first locking assembly 65 can be used to quickly and reliably lock the first hand wheel 621 to prevent the first hand wheel 621 from rotating.

When in use, the adjustment of the first hand wheel 621 is completed, the locking plate 651 is rotated forward, the first protrusion 654 rotates with the locking plate 651, abuts the spring sheet 653 and drives the connecting block of the spring sheet 653 to be clamped into the inner gear ring 652, and the locking of the first hand wheel 621 is completed; when in the locked state, the locking plate 651 is reversed, the second protrusion 655 rotates with the locking plate 651, abuts the other side of the spring sheet 653, and drives the connecting block of the spring sheet 653 to disengage from the inner gear ring 652. When the other end of the spring sheet 653 disengages from the inner gear ring 652, one end face of the second protrusion 655 just touches the stopper 656, limiting the position of the locking plate 651, and completing the contact locking operation.

The second locking assembly 66 includes a second locking member disposed on the second hand wheel 631 , a connecting member 662 , a locking wheel 663 and a spring 664 .

In this embodiment, the connection form between the second locking member and the connecting member 662 can be the meshing of inner and outer gear rings, or the meshing of end face gear rings. In this embodiment, the meshing connection form of end face gear rings is used as an example for explanation.

The second locking piece is a first end face gear ring 661, one end of the connecting piece 662 is provided with a connecting structure matching with the second locking piece, and the other end is provided with a recessed position and a high position, and the connecting structure is a second end face gear ring 6621 matching with the end face gear ring.

The second hand wheel 631 is provided with a counterbore 633, and a spring 664 for resetting the coupling member 662 is provided. The first end face gear ring 661 is provided in the counterbore 633, and the spring 664 is installed in the middle of the first end face gear ring 661. The two ends of the spring 664 respectively abut the bottom of the counterbore 633 and the coupling member 662. The locking wheel 663 is provided with a pressing block, and the pressing block abuts the concave position and the high position of the coupling member 662. When the pressing block is in the concave position, the first end face gear ring 661 and the second end face gear ring 6621 of the coupling member 662 are separated. When the pressing block is in the high position, the spring 664 is in a compressed state, and the first end face gear ring 661 is meshed and connected with the second end face gear ring 6621. When the locking wheel 663 is rotated again, the spring 664 drives the coupling member 662 to separate from the second locking member.

A limit block is provided at one end of the central axis 67 , and the other end passes through the locking wheel 663 , the connecting piece 662 , the first end face gear ring, the second hand wheel 631 , the second linkage rod 632 and the second control wheel 642 , and is fixed at the center of the circular cavity of the cable housing 643 .

A regular hexagonal slide rail 665 is provided, and the regular hexagonal slide rail 665 is fixedly connected to the central axis 67 . The connecting member 662 is provided with a hexagonal through hole matching the slide rail 665 , and the connecting member 662 is slidably arranged along the slide rail 665 .

When in use, the pressing block of the locking wheel 663 rotates from the concave position to the high position, and the pressing block pushes the coupling member 662 to move, thereby meshing the first end face gear ring 661 and the second end face gear ring 6621, thereby achieving the purpose of locking the hand wheel. When the locking wheel 663 rotates forward or continues to rotate, and the pressing block rotates from the high position to the concave position, the spring 664 drives the coupling member 662 to move, so that the second end face gear ring 6621 is disengaged from the first end face gear ring 661, and the first hand wheel 621 is out of the locked state. The meshing of the first end face gear ring 661 and the second end face gear ring 6621 is rigid meshing, and the locked state is stable. During connection, even if an external force acts on the first hand wheel 621, the first end face gear ring 661 will not form a reaction force on the second end face gear ring 6621. In addition, since the spring 664 is in a compressed state when in the locked state, even if a reaction force is formed, the spring 664 in a compressed state can still firmly connect the second end face gear ring 6621 and the first end face gear ring 661. Therefore, the embodiment has a simple structure, is firmly locked, and is not prone to locking failure.

The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. A disposable medical endoscope, characterized in that: the hand wheel control device comprises an insertion assembly, a connecting part and a hand wheel control part, wherein the insertion assembly comprises a bending part, a front end part, a working channel and a jacket, wherein the bending part, the front end part, the working channel and the jacket are arranged at the front end of the control part;

The bending part is provided with a supporting component, the supporting component comprises a near-end joint, a hinge ring group and a far-end joint, one end of the far-end joint is connected with the front end part, the other end is connected with the upper end of the hinge ring group, one end of the near-end joint is connected with the lower end of the hinge ring group, the other end is fixedly connected with the outer sleeve,

The hand wheel control part comprises a first hand wheel assembly, a second hand wheel assembly and a winding assembly for driving the bending assembly, the winding assembly comprises a first control wheel, a second control wheel, a first control cable and a second control cable, one end of the first control cable is wound on the first control wheel, the other end of the first control cable sequentially penetrates through the connecting part and the hinge ring group and is fixedly connected with the distal joint, one end of the second control cable is wound on the second control wheel, the other end of the second control cable sequentially penetrates through the connecting part and the hinge ring group and is fixedly connected with the distal joint, the first hand wheel assembly controls the first control wheel to move, and the second hand wheel assembly controls the second control wheel to move; the hinge ring group comprises a plurality of hinge rings, the hinge rings are hinged in pairs, two first hinge lugs are arranged at one end of each hinge ring along a first radial direction, the first hinge lugs are hinged with the adjacent hinge rings, second hinge lugs are arranged at the other end of each hinge ring along a second radial direction, the second hinge lugs are hinged with the adjacent hinge rings, and the first radial direction and the second radial direction are mutually perpendicular; the outer wall of the upper end of the hinge ring is provided with an outer ring groove, the inner wall of the lower end of the hinge ring is provided with an inner ring groove, the first hinge lug is inserted into the inner ring groove of the adjacent hinge ring, and the second hinge lug sleeve is arranged in the outer ring groove of the adjacent hinge ring.

2. The disposable medical endoscope according to claim 1, wherein the first hinge ear is provided with a hinge shaft, the second hinge ear is provided with a mounting groove, the mounting groove comprises a hinge hole and a mounting channel for guiding the hinge shaft to be mounted in the hinge hole, an inlet of the mounting channel is arranged at the top end or the side edge of the hinge ear, and an outlet of the mounting channel is arranged in the hinge hole; the outer end of the hinge shaft is provided with a stop block, and the transverse or longitudinal size of the stop block is larger than the diameter of the hinge hole; the inlet width of the mounting groove is larger than the outlet width of the mounting groove.

3. The disposable medical endoscope according to claim 2, wherein two threading holes for threading the control cables are formed in the inner wall of each hinge ring, the threading holes are arranged oppositely, one end of each control cable is connected with the control part, and the other end of each control cable penetrates through the threading hole and then is connected with the distal joint.

4. The disposable medical endoscope according to claim 1, wherein the connecting portion comprises a pipe housing, a proximal end of the outer sleeve is inserted into the housing, the outer sleeve and the housing are bonded in a sealing manner through a dissolving adhesive, the working channel is provided with an instrument interface, a water inlet interface, an air inlet interface and a negative pressure suction interface, and the water inlet interface, the air inlet interface and the negative pressure suction interface are respectively provided with electromagnetic valves.

5. The disposable medical endoscope according to claim 1, wherein the front end portion is provided with a light source camera assembly, a transparent heat shield and a fixed cylinder, the light source camera assembly is provided with a light source, a camera and a PCB board, the light source, the camera and the PCB board are fixedly connected to the fixed cylinder, the fixed cylinder is provided with a working channel hole, and the working channel hole is arranged corresponding to an outlet of the working channel; the transparent heat shield is arranged in front of the light source, the lower part of the transparent heat shield is connected with the fixed cylinder, the observation surface of the transparent heat shield is arc-shaped, and the arc-shaped observation surface enables a heat-insulating cavity to be formed between the transparent heat shield and the light source.

6. The disposable medical endoscope according to claim 1, wherein the first control wheel and the second control wheel each comprise a winding ring and a driving disc for fixing the winding ring, the winding ring is provided with a plurality of openings for winding a control cable of the endoscope, the driving disc of the first control wheel is arranged in a driving hole connected with the first wheel assembly, and the driving disc of the second control wheel is provided with a driving hole connected with the second wheel assembly.

7. The disposable medical endoscope according to claim 1, wherein the first wheel assembly comprises a first linkage rod and a first hand wheel, one end of the first linkage rod is fixedly connected with the first hand wheel, and the other end of the first linkage rod is in driving connection with the first control wheel;

The second hand wheel assembly comprises a second linkage rod and a second hand wheel arranged outside the endoscope shell, the second linkage rod penetrates through the first hand wheel, the first linkage rod and the first control wheel, one end of the second linkage rod is fixedly connected with the second hand wheel, and the other end of the second linkage rod is in driving connection with the second control wheel.

8. A disposable medical endoscope according to claim 7, wherein a first locking assembly for locking the first hand wheel assembly and a second locking assembly for locking the second hand wheel assembly are provided,

The first locking assembly comprises a first locking disc, a spring piece and a first locking piece, wherein the first locking piece is connected with the first hand wheel, one end of the spring piece is fixed, the other end of the spring piece is provided with a joint block, the locking disc is provided with a locking piece driving joint block to be connected with the locking piece, the locking disc is rotated positively, when the locking disc is rotated to a locking position, the locking disc is used for driving the joint block to be connected with the locking piece, the locking disc is rotated reversely, and the locking disc is used for driving the joint block to be separated from the locking piece;

The second locking assembly comprises a second locking piece, a connecting piece and a second locking disc, one side of the connecting piece is connected with the second locking piece, a concave position and a high position are arranged on the other side of the connecting piece, the locking disc is provided with a compression block, the compression block is abutted to the concave position or the high position, when the compression block is in the concave position, the connecting piece is separated from the second locking piece, and when the compression block is in the high position, the connecting piece is connected with the second locking piece.