Mist eliminating assembly for endoscope

Abstract

The invention discloses a mist eliminating assembly for an endoscope. Comprising an endoscope body, an inner tube fixedly connected to the endoscope body, an outer tube arranged on the inner tube in a sleeving mode, a cemented prism installed in the inner tube, an opening and closing mechanism installed at the end of the inner tube, a first air channel arranged in the inner tube, a second air channel arranged between the inner tube and the outer tube, and a moving mechanism driving the cemented prism to move. And the linkage mechanism is linked with the opening and closing mechanism and the moving mechanism. When demisting is needed, the glued prism retracts to the inner pipe, and the opening and closing mechanism is closed to form a demisting area. The first air duct is externally connected with gas heating equipment, heated gas is conveyed to the demisting area through the first air duct and the second air duct, and the outer surface of the cemented prism is demisted through airflow circulation. And in a narrow demisting area, the heating effect of the heating gas is fast, the demisting efficiency can be obviously improved, the endoscope can be demisted in time in the working process, and a doctor can observe a diseased region more accurately.

Description

Technical Field

[0001] This application relates to the technical field of minimally invasive medical devices, and particularly to an endoscope fog elimination component. Background Art

[0002] An endoscope is a detection instrument that integrates technologies in multiple fields such as traditional optics, ergonomics, precision machinery, modern electronics, mathematics, and software. It can enter the stomach through the oral cavity or enter the human body through other natural orifices. With the help of an endoscope, doctors can observe lesions that cannot be shown by X-rays, so it has extremely high practical value in the medical field.

[0003] Medical endoscopes mainly consist of an endoscope system, an image display system, and an illumination system. In the endoscope system, the handle and the endoscope body are key components. The endoscope body also includes a protective sheet, multiple objective lenses, image transmission elements, an eyepiece, an illumination element, and auxiliary elements, etc. The illumination system consists of multiple bundles of illumination optical fibers and a light source, and its function is to provide visible light for endoscope imaging.

[0004] During actual operation, the endoscope will enter the human abdominal cavity at 37°C from the operating room environment at 25°C. Due to the sharp environmental change of the front protective sheet of the endoscope from low temperature to high temperature, a fog layer is likely to form on its outer side. This phenomenon will interfere with the doctor's observation and operation, and have an adverse impact on the diagnosis and treatment work. Summary of the Invention

[0005] The purpose of this application is to provide an endoscope fog elimination component to solve the problem of fog formation during the operation of the endoscope.

[0006] An endoscope fog elimination component provided by this application adopts the following technical solution: It includes an endoscope body, an inner tube fixedly connected to the endoscope body, an outer tube sleeved on the inner tube, a glued prism installed on the inner tube, an opening and closing mechanism installed at the end of the inner tube, a first air duct arranged in the inner tube, a second air duct arranged between the inner tube and the outer tube, a moving mechanism for driving the glued prism to move, and a linkage mechanism for linking the opening and closing mechanism and the moving mechanism; the outer tube is connected to the linkage mechanism. By rotating the outer tube, the opening and closing mechanism and the moving mechanism are driven to work through the linkage mechanism. The gap between the glued prism and the opening and closing mechanism is the defogging area, and the first air duct and the second air duct can be communicated through the defogging area.

[0007] By adopting the above technical solution, the first air duct is connected to an external gas heating device. When demisting is required, the glued prism is retracted into the inner tube, the opening and closing mechanism is closed, and the opening and closing mechanism, the glued prism and the inner wall of the inner tube enclose a demisting area. The heated gas is transported to the demisting area through the first air duct and the second air duct by air circulation, and the outer surface of the glued prism is demisted by the heated gas; after demisting, the outer tube is rotated to reduce the distance between the glued prism and the opening and closing mechanism; the opening and closing mechanism effectively prevents the heated gas from overflowing the endoscope into the body; the endoscope can be demisted in time during operation, which helps doctors to observe the lesion site more accurately.

[0008] Optionally, the opening and closing mechanism includes a first metal block fixedly connected to the end of the inner tube, a plurality of baffles installed on the metal block, and a first rotating block rotatably connected to the first metal block, the baffle is located between the first metal block and the first rotating block, the first metal block and the first rotating block are provided with through holes aligned with each other, the plurality of baffles can be spliced ​​into a complete plane to separate the through holes, the first metal block is provided with a first slide groove, the baffle is provided with a second slide groove, the baffle can move along the first slide groove, and the first rotating block is provided with a first rotating protrusion that can move along the second slide groove.

[0009] By adopting the above technical solution, the baffle is located between the first metal block and the first rotating block. Through the rotation of the first rotating block, all the baffles are moved and spliced ​​into a complete plane, thereby preventing the heated gas from escaping from the endoscope and entering the body during defogger. After the defogger is completed, the first rotating block is rotated, and all the baffles are retracted to between the first metal block and the first rotating block, providing an unobstructed field of view for the glued prism. In addition, in the defogger area formed, the heating effect speed after the heated gas flows through is fast, and the defogger efficiency is high.

[0010] Optionally, the moving mechanism includes a second rotating block rotatably connected to the inner tube, a second metal block arranged in the second rotating block, and a mounting tube fixedly connected to the inner tube, the glued prism is fixedly installed in the second metal block, the outer surface of the second metal block is provided with a first annular groove, the center position of the first annular groove coincides with the rotation axis of the second rotating block, the first annular groove and the second rotating block are connected by a key, the inner tube is provided with a spiral groove, the second rotating block is provided with a second protrusion that can move along the spiral groove, and the second metal block is connected to the mounting tube with a sliding key.

[0011] By adopting the above technical solution, the axial movement of the glued prism in the inner tube is realized. First, the second rotating block is connected to the second metal block by a sliding key, so that the rotation of the second rotating block will not affect the second metal block. Since the second rotating block can move along the spiral groove during rotation, the second rotating block can move along the axis direction of the inner tube while rotating. The second rotating block can drive the axial movement of the second metal block through the sliding key; the second metal block is connected to the installation tube by a sliding key, which restricts the circumferential rotation of the second metal block; by rotating the second rotating block, the glued prism can be driven to move, so that when the glued prism removes fog, it can retract into the inner tube, and the effect of the heated gas is strong in a narrow space, and the defogging effect is obvious.

[0012] Optionally, the linkage mechanism includes a rotating wheel disc rotatably connected to the inner tube, a first circular ring rotatably connected to the first rotating block, and a plurality of driving rods hinged to the first circular ring. The driving rods respectively penetrate through the second rotating block and the rotating wheel disc, and the outer tube is connected to the rotating wheel disc by a gear.

[0013] By adopting the above technical solution, the rotation of the outer tube drives the rotation of the rotating wheel disc through the gear. Since the driving rods respectively penetrate through the second rotating block and the rotating wheel disc, they can rotate synchronously. In this way, only by rotating the outer tube, the moving mechanism and the opening and closing mechanism can be driven to work together; in a narrow space, stable power transmission is realized through the driving rods, and the circumferential rotation transmission design makes full use of the limited space and realizes multi-functional integration; the circumferential rotation transmission is realized through the driving rods. Optionally, the first rotating block is provided with a second annular groove, the center of the second annular groove coincides with the rotation axis of the first rotating block, the first circular ring is installed in the second annular groove, and a first spring is provided between the inner wall of the second annular groove and the first circular ring. The first spring forces the first circular ring to move towards the second rotating block, and teeth that can engage with each other are provided on the inner wall of the second annular groove and the first circular ring.

[0014] By adopting the above technical solution, under the action of the first spring, the first circular ring is in a separated state from the second annular groove, so that the first circular ring can rotate independently. When the distance between the glued prism and the opening and closing mechanism gradually increases from 0, the teeth on the inner wall of the second annular groove and the first circular ring change from engagement to separation, and several baffles change from the closed state to the fully closed state; when the distance between the glued prism and the opening and closing mechanism gradually changes from the maximum to 0, the teeth on the inner wall of the second annular groove and the first circular ring change from separation to engagement, and several baffles change from the closed state to gradually open.

[0015] When the distance between the gluing prism and the opening and closing mechanism gradually changes from the maximum to 0 and several baffles are in the closed state, the second metal block and the second rotating block will discharge the gas in the defogging area through the second air duct, and can block the first air duct and the second air duct, effectively preventing the heated gas from entering the body when the opening and closing mechanism is opened.

[0016] Optionally, the second rotating block is provided with a third annular groove, the center of the third annular groove coincides with the rotation axis of the second rotating block, a second ring is arranged in the third annular groove, and a second spring is arranged between the second ring and the inner wall of the third annular groove, and the second spring forces the second ring to move towards the first rotating block.

[0017] By adopting the above technical solution, the first ring, the first spring, the second ring and the second spring constitute a time-delay switch. When the second rotating block moves and the first ring and the second ring have not abutted yet, the first ring disengages from the teeth on the inner wall of the second annular groove, and the first ring rotates alone. At this time, the first ring cannot drive the first rotating plate to rotate. At this time, as long as the second metal block and the second rotating block move; when the first ring and the second ring abut, the first ring will be pressed into the second annular groove, so that the teeth of the first ring and the second annular groove are meshed with each other, thereby driving the first rotating disk to rotate, realizing the opening and closing of the opening and closing mechanism. In this way, only after the defogging is completed, the opening and closing mechanism is in the open state. In other cases, the rotation of the driving rod will not affect the opening and closing mechanism, effectively preventing the leakage of air flow during defogging.

[0018] Optionally, the elastic force of the second spring is greater than that of the first spring.

[0019] By adopting the above technical solution, the elastic force of the second spring is greater than that of the first spring, so that the second ring can push the first ring into the second annular groove, thereby driving the first rotating block to rotate. When the first ring is pushed to the bottom, the second ring will be pressed into the third annular groove, which can provide a certain moving distance for the second rotating block and the second metal block, preventing the second rotating block from being blocked during the moving process.

[0020] Optionally, the inner tube is provided with an installation channel, a middle tube is fixedly connected in the installation channel, the end of the middle tube is hermetically connected to the end of the installation channel, several arc-shaped blocks are fixedly connected to the outer side of the middle tube, the arc-shaped blocks abut against the inner wall of the installation channel, and the outer side surface of the middle tube and the inner wall of the installation channel enclose the first air duct.

[0021] By adopting the above technical solution, the first air duct is formed by a combined method, greatly reducing the processing difficulty of the inner tube. The arc-shaped blocks not only support the middle tube, but also increase the flow resistance effect of the air flow, effectively alleviating the air flow impact.

[0022] Optionally, a continuous wind groove is provided on the outer side of the inner tube, and the inner wall of the wind groove and the inner wall of the outer tube enclose a second wind duct, and the inner tube and the outer tube are movably sealed.

[0023] By adopting the above technical solution, the second air duct is constructed in a combined manner, which greatly reduces the processing difficulty of the inner tube and the outer tube. Moreover, the second air duct is arranged between the inner tube and the outer tube, which can effectively reduce the friction between the inner tube and the outer tube.

[0024] Optionally, a plurality of columnar optical lenses are installed in the mounting tube.

[0025] By adopting the above technical solution, a plurality of columnar optical lenses constitute the transmission path of the optical image, and the mounting tube ensures that the light paths of the glued prisms overlap during movement, thereby ensuring the stability of the image.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When demisting is required, the bonded prism retracts into the inner tube, and the opening and closing mechanism closes to form a demisting area. The first air duct is connected to a gas heating device, and the heated gas is transported to the demisting area through the first and second air ducts, and the outer surface of the bonded prism is demisted by air circulation. In the narrow demisting area, the heated gas heats up quickly, which can significantly improve the demisting efficiency, so that the endoscope can be demisted in time during operation, which helps doctors observe the lesion more accurately; 2. The opening and closing mechanism can effectively prevent the heated gas from overflowing the endoscope and entering the body. The baffle can be spliced ​​into a complete plane to block the through hole when the first rotating block rotates, and can be retracted after the defogger is completed to provide an unobstructed view for the glued prism. In addition, when the distance between the glued prism and the opening and closing mechanism changes from the maximum to 0 and the baffle is closed, the second metal block and the second rotating block will discharge the gas in the defogger area and block the first and second air ducts to prevent the heated gas from entering the body when the opening and closing mechanism is opened.

[0027] 3. The linkage mechanism enables the outer tube to rotate and drive the moving mechanism and the opening and closing mechanism to work at the same time. The outer tube drives the rotating wheel to rotate through the gear, and the driving rod penetrates the second rotating block and the rotating wheel to realize synchronous rotation, realizing stable power transmission and multi-functional integration in a small space, making full use of the limited space; the first ring, the first spring, the second ring and the second spring constitute a delay switch. When the second rotating block moves, the first ring rotates alone first, and only when the first ring abuts against the second ring, it drives the first rotating disk to rotate to realize the opening and closing of the opening and closing mechanism, ensuring that the opening and closing mechanism is opened only after the demisting is completed, effectively preventing the airflow from leaking during demisting; the moving mechanism realizes the axial movement of the bonded prism in the inner tube. When the second rotating block rotates, it moves along the spiral groove, drives the second metal block to move axially through the sliding key, and the second metal block is connected to the mounting tube sliding key to limit circumferential rotation, so that the bonded prism can be retracted into the inner tube during demisting, enhancing the effect of heating gas and improving the demisting effect. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is the present application Figure 1 a partial enlarged view of location a in; Figure 3 is a schematic diagram of the overall structure of the opening and closing mechanism in an embodiment of the present application; Figure 4 is an exploded view of the structure of the opening and closing mechanism in an embodiment of the present application; Figure 5 is a schematic diagram of the overall structure of the first rotating block in an embodiment of the present application; Figure 6 is the present application Figure 2 a partial enlarged view of location b in; Figure 7 is a schematic diagram of the positional installation of the opening and closing mechanism, the moving mechanism, and the linkage mechanism in an embodiment of the present application; Figure 8 is a schematic diagram of the positional installation of the inner tube, the outer tube, and the opening and closing mechanism in an embodiment of the present application; Figure 9 is a schematic diagram of the overall structure of the first air duct in an embodiment of the present application.

[0029] Description of the reference numerals: 1, endoscope body; 2, outer tube; 3, inner tube; 31, spiral groove; 32, defogging area; 4, opening and closing mechanism; 41, first metal block; 411, first chute; 412, barb; 42, baffle; 421, second chute; 43, first rotating block; 431, arc-shaped through groove; 432, first protrusion; 433, second annular groove; 434, first spring; 5, moving mechanism; 51, second rotating block; 511, third annular groove; 512, second ring; 513, second spring; 514, second protrusion; 52, second metal block; 521, first annular groove; 6, linkage mechanism; 61, rotating wheel disc; 62, driving rod; 63, first ring; 7, first air duct; 71, intermediate tube; 72, installation channel; 73, arc-shaped block; 8, second air duct; 9, glued prism; 91, installation tube; 92, columnar optical lens. Detailed Description of the Embodiment

[0030] The following is a further detailed description of the present application in conjunction with the attached Figure 1 - attached Figure 9 drawings.

[0031] An embodiment of the present application discloses an endoscope fog elimination component.

[0032] Embodiment 1, referring to Figure 1 and Figure 2, an endoscope fog elimination component, comprising an endoscope body 1, an inner tube 3 fixedly connected to the endoscope body 1, an outer tube 2 sleeved on the inner tube 3, a glued prism 9 installed on the inner tube 3, an opening and closing mechanism 4 installed at the end of the inner tube 3, a first air duct 7 arranged on the inner tube 3, a second air duct 8 arranged between the inner tube 3 and the outer tube 2, a moving mechanism 5 for driving the glued prism 9 to move, and a linkage mechanism 6 that links the opening and closing mechanism 4 and the moving mechanism 5; the outer tube 2 is connected to the linkage mechanism 6, and the outer tube 2 is rotated to drive the opening and closing mechanism 4 and the moving mechanism 5 to work through the linkage mechanism 6, the gap between the glued prism 9 and the opening and closing mechanism 4 is a defogging area 32, and the first air duct 7 and the second air duct 8 can be connected through the defogging area 32 The first air duct 7 is connected to an external gas transport device and a gas heating device. In this embodiment 1, carbon dioxide gas is used for defogger. When the outer surface of the endoscope is fogged, the outer tube 2 is rotated, and the linkage mechanism 6 drives the moving mechanism 5 to retract the glued prism 9 into the inner tube 3 and drives the opening and closing mechanism 4 to close. The gap between the glued prisms 9 and the glued prisms 9 is continuously enlarged to form a semi-closed defogger area 32. The first air duct 7 and the second air duct 8 are connected to the defogger area 32 at this time. The gas heating device heats the dry carbon dioxide gas to 40°C and transports it to the defogger area 32 through the first air duct 7 to defog the outer surface of the glued prism 9. In this way, the defogger effect on the glued prism 9 is better in a narrow space.

[0033] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The opening and closing mechanism 4 includes a first metal block 41 fixedly connected to the end of the inner tube 3, a plurality of baffles 42 mounted on the metal block, and a first rotating block 43 rotatably connected to the first metal block 41. The baffle 42 is located between the first metal block 41 and the first rotating block 43. The first metal block 41 and the first rotating block 43 are provided with through holes aligned with each other. The first rotating block 43 is circumferentially distributed with four arc-shaped through grooves 431. The first metal block 41 is provided with four barbs 412 penetrating the arc-shaped through grooves 431. The axial movement of the first metal block 41 is limited by the four barbs 412. The plurality of baffles 42 It can be spliced ​​into a complete plane to separate the through hole. The first metal block 41 is provided with a first slide groove 411, and the baffle 42 is provided with a second slide groove 421. The baffle can move along the first slide groove 411. The first rotating block 43 is provided with a first rotating protrusion that can move along the second slide groove 421; when the first rotating block 43 rotates, under the action of the first protrusion 432, the first rotating block 43 will drive the baffle 42 to move along the first slide groove 411, thereby causing all the baffles 42 to move centripetally or outwardly at the same time, thereby completing the opening and closing of the locking mechanism.

[0034] refer to Figure 2 and Figure 6, the moving mechanism 5 includes a second rotating block 51 rotatably connected to the inner tube 3, a second metal block 52 disposed within the second rotating block 51, and a mounting tube 91 fixedly connected to the inner tube 3. The glued prism 9 is fixedly installed within the second metal block 52. The outer surface of the second metal block 52 is provided with a first annular groove 521, the center position of the first annular groove 521 coincides with the rotation axis of the second rotating block 51, and the first annular groove 521 is connected to the second rotating block 51 by a key. The inner tube 3 is provided with a spiral groove 31, and the second rotating block 51 is provided with a second protrusion 514 capable of moving along the spiral groove 31. The second metal block 52 is connected to the mounting tube 91 by a sliding key. When the second rotating block 51 rotates, the second rotating block 51 will rotate relative to the second metal block 52. In this way, the second rotating block 51 will move along the spiral groove 31 of the inner tube 3, causing the second rotating block 51 to move axially along the inner tube 3. Since the second rotating block 51 and the second metal block 52 are connected by the first annular groove 521 and a sliding key, the sliding key can transmit the force in the axial direction of the second rotating block 51 to the second metal block 52, enabling the second metal block 52 to also move axially, thereby realizing the movement of the glued prism 9. Since the mounting tube 91 and the second metal block 52 are connected by a sliding key, a plurality of columnar optical lenses 92 are fixedly connected within the mounting tube 91. In this way, the optical path of the glued connection can be ensured to coincide with that of the columnar optical lenses 92 during the movement.

[0035] Reference Figure 2 and Figure 6 , the linkage mechanism 6 includes a rotating wheel disc 61 rotatably connected to the inner tube 3, a first ring 63 rotatably connected to the first rotating block 43, and four driving rods 62 hinged to the first ring 63. The driving rods 62 respectively penetrate the second rotating block 51 and the rotating wheel disc 61, and the outer tube 2 is connected to the rotating wheel disc 61 by gears. The driving rods 62 mainly transmit the power of the rotating wheel disc 61 to the opening and closing mechanism 4 and the moving mechanism 5. When the outer tube 2 rotates, it drives the rotating wheel disc 61 to rotate through gear transmission. Since the driving rods 62 penetrate the rotating wheel disc 61, the rotating wheel disc 61 can drive the four driving rods 62 to perform circumferential rotation. In this way, it simultaneously drives the first ring 63 and the second rotating block 51 to rotate. In this way, through the rotation of the radial force in a narrow space, not only the stability of power transmission is ensured, but also the structural space is greatly optimized.

[0036] Reference Figure 6, the first rotating block 43 is provided with a second annular groove 433. The center of the second annular groove 433 coincides with the rotation axis of the first rotating block 43. The first ring 63 is installed in the second annular groove 433. A first spring 434 is provided between the inner wall of the second annular groove and the first ring 63. The first spring 434 forces the first ring 63 to move towards the second rotating block 51. Tooth profiles capable of meshing with each other are provided on the inner wall of the second annular groove 433 and the first ring 63. Under the action of the first spring 434, the first ring 63 is in a disengaged state from the second annular groove 433. In this way, the first ring 63 can be in a state of independent rotation. When the distance between the glued prism 9 and the opening and closing mechanism 4 gradually increases from 0, the tooth profiles on the inner wall of the second annular groove 433 and the first ring 63 change from meshing to separation, and several baffles 42 change from a closed state to a fully closed state; When the distance between the glued prism 9 and the opening and closing mechanism 4 gradually changes from the maximum to 0, the tooth profiles on the inner wall of the second annular groove 433 and the first ring 63 change from separation to meshing, and several baffles 42 change from a closed state to a gradually opened state. When the distance between the glued prism 9 and the opening and closing mechanism 4 gradually changes from the maximum to 0 and several baffles 42 are in a closed state, the second metal block 52 and the second rotating block 51 will discharge the gas in the defogging area 32 through the second air duct 8, and can block the first air duct 7 and the second air duct 8. In this way, it effectively prevents the heated gas from entering the body when the opening and closing mechanism 4 is opened.

[0037] Reference Figure 6, the second rotating block 51 is provided with a third annular groove 511. The center of the third annular groove 511 coincides with the rotation axis of the second rotating block 51. A second ring 512 is arranged in the third annular groove 511. A second spring 513 is arranged between the second ring 512 and the inner wall of the third annular groove 511. The second spring 513 forces the second ring 512 to move towards the first rotating block 43; the first ring 63, the first spring 434, the second ring 512 and the second spring 513 form a time-delay switch. When the second rotating block 51 moves and the first ring 63 and the second ring 512 have not yet abutted, the first ring 63 disengages from the teeth on the inner wall of the second annular groove 433, and the first ring 63 rotates independently. At this time, the first ring 63 cannot drive the first rotating plate to rotate. At this time, as long as the second metal block 52 moves with the second rotating block 51; when the first ring 63 abuts against the second ring 512, the first ring 63 will be pressed into the second annular groove 433, so that the teeth of the first ring 63 and the second annular groove 433 are engaged with each other, thereby driving the first rotating disk to rotate and realizing the opening and closing of the opening and closing mechanism 4. In this way, only after the defogging is completed, the opening and closing mechanism 4 is in the open state. In other cases, the rotation of the driving rod 62 will not affect the opening and closing mechanism 4, which can effectively prevent the leakage of air flow during defogging; the elastic force of the second spring 513 is greater than that of the first spring 434, so that the second ring 512 can push the first ring 63 into the second annular groove 433, thereby driving the first rotating block 43 to rotate. When the first ring 63 is pushed to the end, the second ring 512 will be pressed into the third annular groove 511, which can provide a certain moving distance for the movement of the second rotating block 51 and the second metal block 52 and prevent the second rotating block 51 from being blocked during the movement.

[0038] Reference Figure 2 , Figure 7 , Figure 8 and Figure 9 , the inner tube 3 is provided with an installation channel 72. A middle tube 71 is fixedly connected in the installation channel 72. The end of the middle tube 71 is hermetically connected to the end of the installation channel 72. A plurality of arc-shaped blocks 73 are fixedly connected to the outside of the middle tube 71. The arc-shaped blocks 73 abut against the inner wall of the installation channel 72. The outer side surface of the middle tube 71 and the inner wall of the installation channel 72 enclose a first air duct 7. In this way, the processing difficulty of the inner tube 3 is greatly reduced. The arc-shaped blocks 73 not only support the middle tube 71, but also increase the effect of hindering the flow of air, effectively alleviating the air flow impact; a continuous air groove is arranged on the outside of the inner tube 3. The inner wall of the air groove and the inner wall of the outer tube 2 enclose a second air duct 8. The inner tube 3 and the outer tube 2 are movably sealed. The second air duct 8 is arranged between the inner tube 3 and the outer tube 2, which can effectively reduce the friction between the inner tube 3 and the outer tube 2.

[0039] The implementation principle of an endoscope fog elimination component in an embodiment of this application is as follows: When the endoscope is in the normal working mode, the glued prism 9 fully extends to the front end of the inner tube 3, and several baffles 42 of the opening and closing mechanism 4 are in the unfolded state. The first air duct 7 and the second air duct 8 are isolated from each other by the closed defogging area 32. The operator rotates the outer tube 2 clockwise, and the outer tube 2 drives the rotating disk 61 in the linkage mechanism 6 to rotate synchronously through gear transmission. The rotating disk 61 drives the four driving rods 62 passing through its interior to perform circumferential movement. The driving rods 62 transmit power to the second rotating block 51 of the moving mechanism 5 and the first ring 63 of the opening and closing mechanism 4. The second rotating block 51 is pushed by the driving rod 62 to start rotating, and its second protrusion 514 slides along the spiral groove 31 of the inner tube 3, forcing the second rotating block 51 and the second metal block 52 slidably connected to it to retract axially into the inner tube 3. The driving rod 62 also drives the opening and closing mechanism 4 to continue to close. At this time, the gap between the glued prism 9 and the opening and closing mechanism 4 gradually expands, forming a semi-closed defogging area 32.

[0040] At this time, the defogging area 32 is completely formed. The first air duct 7 and the second air duct 8 are connected through the defogging area 32. The gas sprays from the first air duct 7 onto the outer surface of the glued prism 9 for defogging, and then discharges the endoscope through the second air duct 8 with the moisture, completing the cleaning of the mirror surface.

[0041] Rotate the outer tube 2 counterclockwise, and the rotating disk 61 reversely drives the second rotating block 51 and the first ring 63. The second rotating block 51 moves reversely along the spiral groove 31, pushing the second metal block 52 and the glued prism 9 to reset to the front end. The gap of the defogging area 32 returns to zero, and at the same time, the gas in the defogging area 32 is discharged. During the reset process, the teeth between the first ring 63 and the second annular groove 433 change from disengaged to engaged, and the baffle 42 remains stationary for a period of time and then opens.

[0042] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An endoscope fog elimination component, characterized in that: The endoscope comprises an endoscope body (1), an inner tube (3) fixedly connected to the endoscope body (1), an outer tube (2) sleeved on the inner tube (3), a glued prism (9) mounted on the inner tube (3), an opening and closing mechanism (4) mounted on the end of the inner tube (3), a first air duct (7) arranged in the inner tube (3), a second air duct (8) arranged between the inner tube (3) and the outer tube (2), a moving mechanism (5) for driving the glued prism (9) to move, and a linkage mechanism (6) for linking the opening and closing mechanism (4) and the moving mechanism (5); The outer tube (2) is connected to the linkage mechanism (6); the outer tube (2) is rotated to drive the opening and closing mechanism (4) and the moving mechanism (5) to work through the linkage mechanism (6); a gap between the glued prism (9) and the opening and closing mechanism (4) is a demisting area (32); and the first air duct (7) and the second air duct (8) can be connected through the demisting area (32).

2. The endoscopic fog elimination component according to claim 1, characterized in that: The opening and closing mechanism (4) comprises a first metal block (41) fixedly connected to the end of the inner tube (3), a plurality of baffles (42) mounted on the metal block, and a first rotating block (43) rotatably connected to the first metal block (41); the baffle (42) is located between the first metal block (41) and the first rotating block (43); the first metal block (41) and the first rotating block (43) are provided with through holes aligned with each other; the plurality of baffles (42) can be spliced ​​into a complete plane to separate the through holes; the first metal block (41) is provided with a first slide groove (411); the baffle (42) is provided with a second slide groove (421); the baffle can move along the first slide groove (411); and the first rotating block (43) is provided with a first rotating protrusion that can move along the second slide groove (421).

3. The endoscopic fog elimination component according to claim 2, characterized in that: The moving mechanism (5) comprises a second rotating block (51) rotatably connected to the inner tube (3), a second metal block (52) arranged in the second rotating block (51), and a mounting tube (91) fixedly connected to the inner tube (3); the glued prism (9) is fixedly mounted in the second metal block (52); a first annular groove (521) is provided on the outer surface of the second metal block (52); the center position of the first annular groove (521) coincides with the rotation axis of the second rotating block (51); the first annular groove (521) and the second rotating block (51) are connected by a key; the inner tube (3) is provided with a spiral groove (31); the second rotating block (51) is provided with a second protrusion (514) capable of moving along the spiral groove (31); and the second metal block (52) and the mounting tube (91) are connected by a sliding key.

4. The endoscopic fog elimination component according to claim 3, characterized in that: The linkage mechanism (6) comprises a rotating wheel disc (61) rotatably connected to the inner tube (3), a first ring (63) rotatably connected to the first rotating block (43), and a plurality of driving rods (62) hinged to the first ring (63), wherein the driving rods (62) respectively penetrate the second rotating block (51) and the rotating wheel disc (61), and the outer tube (2) is connected to the rotating wheel disc (61) via gears.

5. The endoscopic fog elimination component according to claim 4, wherein: The first rotating block (43) is provided with a second annular groove (433), the center of the second annular groove (433) coincides with the rotation axis of the first rotating block (43), the first ring (63) is installed in the second annular groove (433), a first spring (434) is provided between the inner wall of the second annular groove and the first ring (63), the first spring (434) forces the first ring (63) to move towards the second rotating block (51), and the inner wall of the second annular groove (433) and the first ring (63) are provided with teeth that can engage with each other.

6. The endoscopic fog elimination component according to claim 5, wherein: The second rotating block (51) is provided with a third annular groove (511), the center of the third annular groove (511) coincides with the rotation axis of the second rotating block (51), a second ring (512) is provided in the third annular groove (511), a second spring (513) is provided between the second ring (512) and the inner wall of the third annular groove (511), and the second spring (513) forces the second ring (512) to move towards the first rotating block (43).

7. The endoscopic fog elimination component according to claim 6, characterized in that: The elastic force of the second spring (513) is greater than that of the first spring (434).

8. The endoscopic fog elimination component according to claim 7, wherein: The inner tube (3) is provided with an installation channel (72), a middle tube (71) is fixedly connected in the installation channel (72), the end of the middle tube (71) is hermetically connected to the end of the installation channel (72), a plurality of arc-shaped blocks (73) are fixedly connected to the outside of the middle tube (71), the arc-shaped blocks (73) are in contact with the inner wall of the installation channel (72), and the outer side surface of the middle tube (71) and the inner wall of the installation channel (72) enclose a first air duct (7).

9. The endoscopic fog elimination component according to claim 8, wherein: A continuous air groove is provided on the outside of the inner tube (3), the inner wall of the air groove and the inner wall of the outer tube (2) enclose a second air duct (8), and the inner tube (3) and the outer tube (2) are movably sealed.

10. The endoscope fog elimination component according to claim 9, wherein: A plurality of columnar optical lenses (92) are installed in the installation tube (91).

Images