An endoscope lens with a defogging function

Abstract

The present application provides an endoscope lens with a defogging function, which relates to the field of endoscope lenses. It includes a lens rod and also includes a defogging component. The defogging component includes an air inlet pipe and an air outlet pipe arranged inside the lens rod. A sealed chamber is formed between the bottom end of the imaging component and the anti-fog lens. The inner ends of the air inlet pipe and the air outlet pipe are respectively communicated with the chamber. The defogging component includes a group of cleaning rods rotatably arranged on the inner wall of the lens rod. The bottom end of the cleaning rod extends outside the anti-fog lens and is provided with wiping pieces for cleaning the outside of the anti-fog lens. By setting the defogging component in the present application, the outer ends of the air inlet pipe and the air outlet pipe are respectively circularly communicated with an external hot air source before the operation, so that the temperature at the anti-fog lens, that is, in the chamber, can be regulated to be close to the temperature in the patient's body. Correspondingly, the probability of the anti-fog lens being atomized due to the temperature difference during the subsequent operation is reduced, which is beneficial to improving the working efficiency of the operation.

Description

Technical Field

[0001] The present invention relates to the field of endoscope lenses, and more particularly, to an endoscope lens with a defogging function. Background Art

[0002] A laparoscope is a precision medical device used in minimally invasive surgeries. It includes a laparoscope lens with a miniature camera that can penetrate into the patient's body and transmit real-time images of the abdominal cavity through a small incision in the abdominal wall to an external display, assisting doctors in diagnosis and treatment. However, during the surgery, due to the temperature difference between inside and outside the body, the laparoscope lens is prone to fogging inside the patient's body, which affects the surgical field of view. In the prior art, the lens is often taken out for treatment after fogging, which is rather cumbersome and reduces the surgical efficiency.

[0003] For example: The "Defogging Device for Laparoscope Lens Used in Gastrointestinal Surgery" disclosed in the Chinese Utility Model Patent (Application No.: CN202122588342.8) has the following description in its specification: When doctors perform gastrointestinal surgeries on patients, they often need to use laparoscopes. In the actual use of existing laparoscopes, although they can achieve the basic effect of observing the inside of the abdominal cavity, due to the lack of a good heating and defogging structure for the laparoscope, when the temperature of the laparoscope is inconsistent with that of the human abdominal cavity, fogging will occur on the surface of its lens, affecting the lens clarity and thus bringing inconvenience to doctors' use; the above patent can prove the defects existing in the prior art.

[0004] Therefore, we make improvements and propose an endoscope lens with a defogging function. Summary of the Invention

[0005] The purpose of the present invention is to address the current problem that during the surgery, due to the temperature difference between inside and outside the body, the laparoscope lens is prone to fogging inside the patient's body, which affects the surgical field of view. In the prior art, the lens is often taken out for treatment after fogging, which is rather cumbersome and reduces the surgical efficiency.

[0006] To achieve the above-mentioned invention purpose, the present invention provides an endoscope lens with a defogging function to improve the above problems.

[0007] Specifically, this application is as follows:

[0008] An endoscope lens with a defogging function includes a lens rod, wherein a camera component and an anti-fog lens are arranged inside the lens rod, the anti-fog lens is located at the port at the bottom of the lens rod, and further includes:

[0009] The anti-fog component includes an intake pipe and an exhaust pipe disposed within the mirror rod with their outer ends extending to the outside of the mirror rod end. A sealed chamber is formed between the bottom end of the imaging member and the anti-fog lens. The inner ends of the intake pipe and the exhaust pipe are respectively connected to the chamber. During use, the outer ends of the intake pipe and the exhaust pipe are respectively connected in a circulating manner to an external heat source.

[0010] The defogging component includes a group of cleaning rods rotatably disposed on the inner wall of the mirror rod. The bottom end of the cleaning rod extends outside the anti-fog lens and is provided with wiping pieces for cleaning the outside of the anti-fog lens. An operating member for controlling the rotation of the cleaning rod is provided at the top of the mirror rod.

[0011] As a preferred technical solution of the present application, the mirror rod has an inner cavity. A ring seat is fixed at the bottom of the inner cavity. The imaging member is disposed within the ring seat. A chamber is formed between the bottom end of the ring seat and the bottom end of the imaging member aligned with the anti-fog lens. The inner ends of the intake pipe and the exhaust pipe both pass through the ring seat and extend into the chamber.

[0012] As a preferred technical solution of the present application, a group of transmission shafts are arranged in an equidistant annular shape on the inner wall of the mirror rod. The transmission shafts are driven to rotate by the operating member. There are three cleaning rods which are respectively rotatably installed directly below the corresponding transmission shafts. The bottom parts of the cleaning rods are respectively inserted and connected with the side frame of the anti-fog lens and the ring seat. The bottom of the transmission shaft has a spline shaft, and the top of the cleaning rod has a connection groove adapted to the spline shaft.

[0013] As a preferred technical solution of the present application, a piston seat with an inner cavity is embedded in the side part of the ring seat. The bottom of the piston seat is communicated with the chamber. The top of the piston seat is communicated with the inner end of the intake pipe. A thermo-expansion and contraction member is elastically arranged inside the piston seat. The thermo-expansion and contraction member includes a piston rod extending into the piston seat. The top end of the piston rod is fixed with a linkage ring plate. A pair of convex blocks are provided at the top of the cleaning rod. A clamping groove for clamping the side part of the linkage ring plate is formed between the two convex blocks. The opposite surfaces of the convex blocks and the linkage ring plate are slidably connected.

[0014] As a preferred technical solution of the present application, the thermo-expansion and contraction member includes a pair of partition plates arranged in the inner cavity of the piston seat. An air passage for the hot air flow to flow into the chamber is formed between the two partition plates. A heat conducting plate is provided at the bottom of the partition plate. A piston chamber is formed between the partition plate and the inner wall of the piston seat. The piston rod is adaptively arranged at the top of the piston chamber, and a straight spring and a thermo-expansion and contraction medium are filled between the bottom end and the inner wall of the piston seat.

[0015] As a preferred technical solution of the present application, there are three piston seats which are arranged in an equidistant annular pattern on the side wall of the ring seat. The side part of the ring seat is provided with a first installation groove for installing the piston seat and a second installation groove for the cleaning rod to pass through. A through groove for the cleaning rod to rotate is formed between the second installation groove and the inner wall of the mirror rod.

[0016] As a preferred technical solution of the present application, a pair of branch pipes are connected to the bottom of the air outlet pipe, and the two branch pipes are respectively connected to the air ducts in the inner cavities of the corresponding two piston seats.

[0017] As a preferred technical solution of the present application, the operating member includes a ring sleeve rotatably arranged on the outer wall of the top of the mirror rod and a ring pipe arranged on the inner wall of the mirror rod. The ring pipe and the ring sleeve are fixedly connected through a connecting block. An arc-shaped notch for the connecting block to move is formed on the mirror rod. Three groups of arc-shaped tooth rows are arranged at the bottom of the ring pipe, and a transmission gear corresponding to the arc-shaped tooth rows is arranged at the top end of the transmission shaft.

[0018] As a preferred technical solution of the present application, the three groups of arc-shaped tooth rows are respectively located on different horizontal planes, and the distance between the end parts of the three groups of arc-shaped tooth rows and the corresponding transmission gears gradually decreases from top to bottom. The arc-shaped tooth row at the bottom is engaged with the corresponding transmission gear.

[0019] As a preferred technical solution of the present application, a convex plate is arranged on the inner wall of the mirror rod. The connecting block and the convex plate are respectively located on both sides of the arc-shaped notch. An arc-shaped spring is arranged between the connecting block and the convex plate.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In the solution of the present application:

[0022] 1. Through the provided anti-fogging component, the outer ends of the air inlet pipe and the air outlet pipe are respectively connected to an external hot air source in a circulating manner before the operation, that is, a circulating hot air pipeline is formed between the air inlet pipe, the chamber, the air outlet pipe and the external hot air source. Furthermore, the temperature at the anti-fogging lens, that is, in the chamber, can be regulated to be close to the temperature of the patient's body. Correspondingly, the probability of the anti-fogging lens being atomized due to the temperature difference during the subsequent operation is reduced, which is beneficial to improving the working efficiency of the operation.

[0023] 2. Through the provided defogging component, by controlling the operating member to drive the cleaning rod to rotate, and then controlling the wiping piece to wipe the anti-fogging lens, it is ensured that the imaging member clearly obtains the image of the patient's body, improves the smoothness of the operation, and avoids affecting the progress of the operation due to the adhesion of tissue fluid, tissue particles, etc. in the patient's body on the anti-fogging lens.

[0024] 3. Through the provided ring seat, a thermal expansion and contraction component is elastically arranged inside the piston seat. During the process of circulating hot air flow through the chamber, the thermal expansion and contraction component is heated and drives the piston rod to move outward. Then, through the linkage ring plate, the cleaning rod is driven to move upward synchronously, enabling the wiping piece to contact the anti-fog lens, ensuring the cleaning effect on the anti-fog lens. On the contrary, when hot air flow does not need to be circulated after the operation, the thermal expansion and contraction component is no longer heated and returns to its initial state, causing the wiping piece to separate from the anti-fog lens, that is, a space for cleaning is left between the wiping piece and the anti-fog lens, thus facilitating a more comprehensive disinfection treatment of the wiping piece after the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a schematic structural diagram of an endoscope lens with a defogging function provided by the present application;

[0026] Figure 2 FIG. is a schematic structural diagram of the bottom of the inner cavity of the lens rod of an endoscope lens with a defogging function provided by the present application;

[0027] Figure 3 FIG. is a schematic structural diagram of the ring seat of an endoscope lens with a defogging function provided by the present application;

[0028] Figure 4 FIG. is a partial structural diagram of the air inlet pipe and the air outlet pipe of an endoscope lens with a defogging function provided by the present application;

[0029] Figure 5 FIG. is a sectional view of the inside of the piston seat of an endoscope lens with a defogging function provided by the present application;

[0030] Figure 6 FIG. is a schematic structural diagram of the defogging component of an endoscope lens with a defogging function provided by the present application;

[0031] Figure 7 FIG. is a top view of the ring sleeve of an endoscope lens with a defogging function provided by the present application;

[0032] Figure 8 FIG. is a schematic structural diagram of the connection between the ring pipe and the transmission gear of an endoscope lens with a defogging function provided by the present application.

[0033] Reference numerals in the figures:

[0034] 100, lens rod; 101, imaging component; 102, anti-fog lens; 103, ring seat; 104, arc groove opening;

[0035] 200, air inlet pipe; 201, air outlet pipe; 202, chamber; 203, branch pipe;

[0036] 300. Cleaning rod; 301. Wiping piece; 302. Transmission shaft; 303. Spline shaft; 304. Connecting groove; 305. Bump; 306. Ring tube; 307. Connecting block; 308. Arc-shaped tooth row; 309. Transmission gear; 310. Arc-shaped spring; 311. Ring sleeve; 312. Convex plate;

[0037] 400. Piston seat; 401. Piston rod; 402. Linking ring plate; 403. Partition plate; 404. Heat conducting plate; 405. Piston cavity; 406. Straight spring. Detailed implementation manner

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] The present invention will be further described below in conjunction with the embodiments.

[0040] Embodiment: Please refer to Att Figure 1 to Att Figure 8 , a laparoscope lens with a defogging function, including a lens rod 100, a camera component 101 and an anti-fog lens 102 are arranged in the lens rod 100, and the anti-fog lens 102 is located at the port at the bottom of the lens rod 100. Here is the structure of a conventional laparoscope lens, and no more details will be described here.

[0041] In order to improve the problem that during the operation, the laparoscope lens needs to be taken out of the patient's body for treatment after being atomized, the operation is rather cumbersome, and the operation efficiency of the operation is reduced. In this application, an anti-fog component is provided. The anti-fog component includes an air inlet pipe 200 and an air outlet pipe 201 which are arranged in the lens rod 100 and whose outer ends extend to the outside of the end of the lens rod 100. A sealed chamber 202 is formed between the bottom end of the camera component 101 and the anti-fog lens 102. The inner ends of the air inlet pipe 200 and the air outlet pipe 201 are respectively communicated with the chamber 202. When in use, the outer ends of the air inlet pipe 200 and the air outlet pipe 201 are respectively communicated with an external hot air source in a circulating manner, that is, a circulating hot air pipeline is formed between the air inlet pipe 200, the chamber 202, the air outlet pipe 201 and the external hot air source. Furthermore, the temperature at the anti-fog lens 102, that is, in the chamber 202, can be regulated to be close to the temperature in the patient's body. Correspondingly, the probability of the anti-fog lens 102 being atomized due to the temperature difference in the body is reduced, which is beneficial to improving the working efficiency of the operation;

[0042] Furthermore, in addition to the reason that the anti-fog lens 102 is not atomized due to the temperature difference, in the patient's body, the progress of the operation may also be affected by the adhesion of tissue fluid, tissue particles, etc. in the patient's body to the anti-fog lens 102. Therefore, in this application, a defogging component is further provided. The defogging component includes a group of cleaning rods 300 rotatably arranged on the inner wall of the lens rod 100. The bottom end of the cleaning rod 300 extends outside the anti-fog lens 102 and is provided with a wiping piece 301 for cleaning the outside of the anti-fog lens 102. An operating member for controlling the rotation of the cleaning rod 300 is arranged at the top of the lens rod 100. When the above situation that affects the clarity of the anti-fog lens 102 occurs, the operating member can be controlled to drive the cleaning rod 300 to rotate, thereby controlling the wiping piece 301 to wipe the anti-fog lens 102, ensuring that the imaging member 101 clearly obtains the image in the patient's body, and improving the smoothness of the operation.

[0043] Specifically, the lens rod 100 has an inner cavity. A ring seat 103 is fixed at the bottom of the inner cavity. The ring seat 103 leaves a space for installing the imaging member 101, that is, the imaging member 101 is arranged in the ring seat 103. After the bottom end of the ring seat 103 is aligned with the bottom end of the imaging member 101, a sealed chamber 202 is formed between the ring seat 103 and the anti-fog lens 102. The inner ends of the air inlet pipe 200 and the air outlet pipe 201 both pass through the ring seat 103 and extend into the chamber 202, so that the anti-fog lens 102 can be heated comprehensively. Correspondingly, since the patient's body temperature is not in a high-temperature environment, the flowing hot air flow will not affect the imaging process of the imaging member 101.

[0044] Specifically, a group of transmission shafts 302 are arranged on the inner wall of the lens rod 100 at equal intervals in a ring shape. The transmission shafts 302 are driven to rotate by the operating member. There are three cleaning rods 300, which are respectively rotatably installed directly below the corresponding transmission shafts 302. The bottom parts of the cleaning rods 300 are respectively inserted and connected with the side frame of the anti-fog lens 102 and the ring seat 103. The bottom of the transmission shaft 302 has a spline shaft 303, and the top of the cleaning rod 300 has a connection groove 304 adapted to the spline shaft 303. The cleaning rod 300 is inserted and connected with the spline shaft 303. Through the arranged connection groove 304 and spline shaft 303, the cleaning rod 300 can move along the direction of the transmission shaft 302. At the same time, by driving the transmission shaft 302 to rotate, the cleaning rod 300 can be driven to rotate, that is, the wiping piece 301 can be driven to rotate. So during the operation, by driving the wiping piece 301 to contact the outer surface of the anti-fog lens 102 and then driving the transmission shaft 302 to rotate, the wiping piece 301 can be driven to clean the anti-fog lens 102. Correspondingly, after the operation, by driving the wiping piece 301 to separate from the outer surface of the anti-fog lens 102, that is, there is a space between the wiping piece 301 and the anti-fog lens 102, which is convenient for a more comprehensive disinfection treatment of the wiping piece 301 after the operation, and improves the practicability of the device.

[0045] Specifically, a piston seat 400 with an inner cavity is embedded in the side of the ring seat 103. The bottom of the piston seat 400 communicates with the chamber 202, and the top of the piston seat 400 communicates with the inner end of the intake pipe 200. A thermal expansion and contraction member is elastically arranged inside the piston seat 400. The thermal expansion and contraction member includes a piston rod 401 extending into the piston seat 400. A linkage ring plate 402 is fixed to the top end of the piston rod 401. A pair of protrusions 305 are arranged at the top of the cleaning rod 300. A clamping groove for clamping with the side of the linkage ring plate 402 is formed between the two protrusions 305. The protrusions 305 are slidably connected to the opposite surfaces of the linkage ring plate 402. By providing the piston seat 400, the up-and-down movement of the cleaning rod 300 is associated with the piston seat 400. That is, during the process of circulating hot air flow into the chamber 202, the piston rod 401 moves outward due to the heating of the thermal expansion and contraction member, and then the linkage ring plate 402 is driven to move upward by the two protrusions 305, and further the cleaning rod 300 moves upward to drive the wiping piece 301 to contact the anti-fog lens 102, ensuring the cleaning effect on the anti-fog lens 102. On the contrary, after the operation, when the anti-fog treatment of the anti-fog lens 102 is no longer required, the thermal expansion and contraction member is no longer heated, that is, it returns to the initial state, so that the wiping piece 301 is separated from the anti-fog lens 102, facilitating operations such as disinfecting the wiping piece 301. Through the setting of the above structure, the wiping piece 301 can automatically drive the state of the wiping piece 301 according to different scenarios (surgical scenario and non-surgical scenario) without manual adjustment, improving the convenience of using the device.

[0046] Specifically, the thermal expansion and contraction member includes a pair of partition plates 403 arranged in the inner cavity of the piston seat 400. An air passage for hot air flow to flow into the chamber 202 is formed between the two partition plates 403. A heat conducting plate 404 is arranged at the bottom of the partition plate 403. A piston chamber 405 is formed between the partition plate 403 and the inner wall of the piston seat 400. The piston rod 401 is adaptively arranged at the top of the piston chamber 405, and a straight spring 406 and a thermal expansion and contraction medium are filled between the bottom end and the inner wall of the piston seat 400. When the hot air flow is introduced or exported, when the hot air flow passes through the heat conducting plate 404, the thermal expansion and contraction medium filled inside absorbs heat and expands, and then drives the piston rod 401 to move upward, and further drives the cleaning rod 300 and the wiping piece 301 to move upward. On the contrary, after the hot air flow stops circulating and returns to normal temperature, that is, the thermal expansion and contraction medium is no longer heated and gradually contracts, and then drives the wiping piece 301 to move downward synchronously to be separated from the anti-fog lens 102, providing a relatively large space for cleaning the wiping piece 301 after the operation.

[0047] Specifically, three piston seats 400 are provided and arranged in an equidistant circular pattern on the side wall of the ring seat 103. The side part of the ring seat 103 is provided with a first installation groove for installing the piston seat 400 and a second installation groove for the cleaning rod 300 to pass through. A through groove for the cleaning rod 300 to rotate is formed between the inner wall of the second installation groove and the inner wall of the mirror rod 100. The inner wall of the mirror rod 100 has elastic convex ribs (not shown in the figure) opposite to the sides of the first installation groove and the second installation groove, so that the chamber 202 formed after the bottom end of the ring seat 103 is aligned with the bottom end of the imaging element 101 is airtight, avoiding hot air leakage.

[0048] Specifically, a pair of branch pipes 203 are connected to the bottom of the air outlet pipe 201, and the two branch pipes 203 are respectively connected to the air channels in the inner cavities of the corresponding two piston seats 400. The two branch pipes 203 are provided so that the hot air flows entering the chamber 202 are discharged from the two branch pipes 203 respectively, so that the anti-fog lens 102 is in more uniform relative contact with the hot air flow, improving the anti-fog effect on the anti-fog lens 102.

[0049] Further, the operating member includes a ring sleeve 311 rotatably provided on the outer wall of the top of the mirror rod 100 and a ring pipe 306 provided on the inner wall of the mirror rod 100. The ring pipe 306 and the ring sleeve 311 are fixedly connected by a connecting block 307. An arc-shaped notch 104 for the connecting block 307 to move is provided on the mirror rod 100. Three groups of arc-shaped tooth rows 308 are provided at the bottom of the ring pipe 306. A transmission gear 309 corresponding to the arc-shaped tooth rows 308 is provided at the top end of the transmission shaft 302. The three groups of arc-shaped tooth rows 308 are respectively located on different horizontal planes, and the distance between the ends of the three groups of arc-shaped tooth rows 308 and the corresponding transmission gears 309 gradually decreases from top to bottom. The arc-shaped tooth row 308 at the bottom is meshed with the corresponding transmission gear 309. In a specific implementation, by rotating the ring sleeve 311, the ring pipe 306 is synchronously rotated, so that the three groups of arc-shaped tooth rows 308 drive the transmission gears 309 to rotate in sequence, and then drive the three groups of cleaning rods 300 and the wiping pieces 301 to rotate in sequence, avoiding the three wiping pieces 301 from blocking each other at the center of the anti-fog lens 102 and ensuring the cleaning effect on the anti-fog lens 102. Among them, a convex plate 312 is provided on the inner wall of the mirror rod 100. The connecting block 307 and the convex plate 312 are respectively located on both sides of the arc-shaped notch 104. An arc-shaped spring 310 is provided between the connecting block 307 and the convex plate 312. The rotation angle of the wiping piece 301 can be limited by the setting of the arc-shaped notch 104. Preferably, the included angle between the two ends of the arc-shaped notch 104 is 120°. Correspondingly, the three wiping pieces 301 can cover and clean the surface of the anti-fog lens 102, providing a guarantee for the imaging work of the imaging element 101. By providing the arc-shaped spring 310, it can be ensured that when the ring sleeve 311 returns to the initial position, that is, the wiping piece 301 is located on the side of the anti-fog lens 102.

[0050] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the drawings, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields shall be similarly within the scope of the patent protection of the present invention.

Claims

1. A cavity mirror lens with a defogging function, comprising a mirror rod (100), wherein a camera element (101) and an anti-fog lens (102) are arranged inside the mirror rod (100), and the anti-fog lens (102) is located at a port at the bottom of the mirror rod (100), characterized in that: Also includes: The anti-fog assembly comprises an air inlet pipe (200) and an air outlet pipe (201) which are arranged inside a mirror rod (100) and whose outer ends extend to the outside of the end of the mirror rod (100); a sealed chamber (202) is formed between the bottom end of the camera element (101) and the anti-fog lens (102); the inner ends of the air inlet pipe (200) and the air outlet pipe (201) are respectively connected to the chamber (202); when in use, the outer ends of the air inlet pipe (200) and the air outlet pipe (201) are respectively connected to an external hot air source in a circulation manner; A defogging assembly comprises a group of cleaning rods (300) rotatably arranged on the inner wall of a mirror rod (100), the bottom ends of the cleaning rods (300) extending outside the anti-fog lens (102) and provided with wiping sheets (301) for cleaning the outside of the anti-fog lens (102), and the top of the mirror rod (100) is provided with an operating member for controlling the rotation of the cleaning rods (300); The mirror rod (100) has an inner cavity, a ring seat (103) is fixed at the bottom of the inner cavity, the camera element (101) is arranged in the ring seat (103), the bottom end of the ring seat (103) is aligned with the bottom end of the camera element (101), and a chamber (202) is formed between the ring seat (103) and the anti-fog lens (102), and the inner ends of the air inlet pipe (200) and the air outlet pipe (201) both pass through the ring seat (103) and extend into the chamber (202); The inner wall of the mirror rod (100) is provided with a group of transmission shafts (302) in an equidistant annular shape, the transmission shaft (302) is driven to rotate by an operating member, three cleaning rods (300) are provided and are respectively rotatably mounted directly below the corresponding transmission shafts (302), the bottoms of the cleaning rods (300) are respectively connected to the side frame and the ring seat (103) of the anti-fog lens (102), the bottom of the transmission shaft (302) has a spline shaft (303), and the top of the cleaning rod (300) has a connecting groove (304) adapted to the spline shaft (303); A piston seat (400) having an inner cavity is embedded in the side of the ring seat (103); the bottom of the piston seat (400) is communicated with the chamber (202); the top of the piston seat (400) is communicated with the inner end of the intake pipe (200); a thermal expansion and contraction component is elastically arranged inside the piston seat (400); the thermal expansion and contraction component comprises a piston rod (401) extending into the piston seat (400); a linkage ring plate (402) is fixed to the top of the piston rod (401); a pair of protrusions (305) are arranged on the top of the cleaning rod (300); a slot is formed between the two protrusions (305) and is engaged with the side of the linkage ring plate (402); the protrusions (305) are slidably connected to the opposite surface of the linkage ring plate (402).

2. The cavity mirror lens with defogging function according to claim 1, characterized in that: The thermal expansion and contraction component comprises a pair of partitions (403) arranged in the inner cavity of the piston seat (400), an air passage for hot air flow to flow into the chamber (202) is formed between the two partitions (403), a heat conducting plate (404) is arranged at the bottom of the partition (403), a piston cavity (405) is formed between the partition (403) and the inner wall of the piston seat (400), the piston rod (401) is adapted to be arranged at the top of the piston cavity (405), and a straight spring (406) is arranged between the bottom end and the inner wall of the piston seat (400) and is filled with a thermal expansion and contraction medium.

3. The cavity mirror lens with defogging function according to claim 2, characterized in that: The piston seat (400) is provided with three equidistantly arranged ring-shaped side walls of the ring seat (103); a first mounting groove for mounting the piston seat (400) and a second mounting groove for the cleaning rod (300) to pass through are formed on the side of the ring seat (103); a through groove for the cleaning rod (300) to rotate is formed between the second mounting groove and the inner wall of the mirror rod (100).

4. The cavity mirror lens with a defogging function according to claim 3, characterized in that: The bottom of the air outlet pipe (201) is connected to a pair of branch pipes (203), and the two branch pipes (203) are respectively connected to the air passages in the inner cavities of the two corresponding piston seats (400).

5. The cavity mirror lens with defogging function according to claim 4, characterized in that: The operating member comprises a ring sleeve (311) rotatably arranged on the outer wall of the top of the mirror rod (100) and a ring tube (306) arranged on the inner wall of the mirror rod (100); the ring tube (306) and the ring sleeve (311) are fixedly connected via a connecting block (307); an arc notch (104) for the connecting block (307) to move is provided on the mirror rod (100); three groups of arc-shaped tooth rows (308) are provided at the bottom of the ring tube (306); and a transmission gear (309) corresponding to the arc-shaped tooth rows (308) is provided at the top of the transmission shaft (302).

6. The cavity mirror lens with defogging function according to claim 5, characterized in that: The three groups of arc-shaped tooth rows (308) are respectively located on different horizontal planes, and the distances between the ends of the three groups of arc-shaped tooth rows (308) and the corresponding transmission gears (309) gradually decrease from top to bottom, and the arc-shaped tooth row (308) located at the bottom is meshed with the corresponding transmission gear (309).

7. The cavity mirror lens with defogging function according to claim 6, characterized in that: The inner wall of the mirror rod (100) is provided with a convex plate (312), the connecting block (307) and the convex plate (312) are respectively located on both sides of the arc notch (104), and an arc spring (310) is provided between the connecting block (307) and the convex plate (312).

Images