A liquid crystal display with a waterproof function

Abstract

The present invention relates to the technical field of liquid crystal display screens, and particularly to a liquid crystal display screen with a waterproof function, which includes a display screen main body. A mounting frame is fixedly connected to the display screen main body, and a water receiving top seat is fixedly connected to the mounting frame. A waterproof cover is fixedly connected to the rear side of the display screen main body, and a heat dissipation pipe is fixedly connected inside the waterproof cover. A plurality of inner wall scraping mechanisms are rotatably connected through the heat dissipation pipe. A transmission rod is rotatably connected inside the waterproof cover, and a transmission mechanism is fixedly connected inside the waterproof cover. When it rains and the waterproof board is closed to waterproof the display screen, the rainwater flows in the heat dissipation pipe, and the heat generated by the internal equipment of the waterproof cover is absorbed through the flow of the rainwater. Using rainwater as a heat dissipation medium can reduce the dependence on artificial refrigeration equipment (such as fans, air conditioners, etc.), save energy, and can prevent external water sources from invading while ensuring that the internal equipment can effectively dissipate heat and prevent the equipment from malfunctioning due to overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display screens, and in particular to a liquid crystal display screen with a waterproof function. Background Art

[0002] Liquid crystal displays (LCDs) are a display technology that utilizes the optical properties of liquid crystals to display images or text. Liquid crystals themselves don't emit light; instead, illumination from a backlight causes the liquid crystal molecules to shift in alignment, regulating the passage and reflection of light, ultimately displaying what we see. LCDs are a mature and widely used display technology, offering advantages such as thinness, low power consumption, and high resolution. Despite some limitations in color reproduction and response speed, continuous technological advancements have led to their continued importance in various fields, particularly in consumer electronics such as televisions, mobile phones, and computers.

[0003] The document with the prior art publication number CN118314810A provides an outdoor high-definition waterproof LCD display with anti-rainfall function. Through the automatic rain shield mechanism, it can use the rain collecting box to collect falling rainwater, increase its own gravity and move downward, and cooperate with the pulling rope to pull the counterweight frame and the rain shield to replace the position of the rain shield and the rain collecting box to move and block the heat dissipation holes. This is beneficial for the device to use the gravity of collected rainwater to automatically block the heat dissipation holes, increase the service life of the built-in electronic components of the device, and improve the anti-rainfall function of the device.

[0004] When using existing technology, the rain collection box must be filled with a certain amount of rainwater before the rain shield can be activated to seal the heat dissipation holes. Before the rain collection box is filled with a certain amount of rainwater, the heat dissipation holes are open, allowing rainwater to easily enter. At the same time, after the rain shield seals the heat dissipation holes, heat inside the device is trapped. Especially for high-power devices such as display screens, heat accumulation can affect device performance and even cause overheating. In the sealed state, the heat inside the device is difficult to dissipate through air circulation, which may cause excessive temperatures and affect the normal operation of the display screen.

[0005] In summary, the prior art lacks a technology for fully dissipating heat from a liquid crystal display screen that is sealed and waterproof. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a liquid crystal display screen with a waterproof function.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a liquid crystal display screen with a waterproof function, comprising a display screen body, a mounting bracket connected and fixedly provided on the display screen body, a water receiving top seat connected and fixedly provided on the mounting bracket, a waterproof cover connected and fixedly provided on the rear side of the display screen body, a heat dissipation pipe connected and fixedly provided inside the waterproof cover, a plurality of inner wall scraping mechanisms rotatably connected and provided on the heat dissipation pipe, a transmission rod rotatably provided inside the waterproof cover, and a transmission mechanism connected and fixedly provided inside the waterproof cover.

[0008] Preferably, a water filter top is fixedly connected to the water receiving top seat, and a water retaining frame is slidably provided on the water filter top.

[0009] Preferably, a plurality of heat dissipation openings are provided on one side of the waterproof cover, a waterproof plate is rotatably connected to the heat dissipation opening, and a worm gear is fixedly connected to the middle of the waterproof plate.

[0010] Preferably, one end of the heat dissipation pipe passes through the inner wall of the waterproof cover and extends into the water receiving top seat, and the other end of the heat dissipation pipe passes through the inner wall of the waterproof cover and extends to the lower side. The outer wall of the heat dissipation pipe is rotatably connected to a ring frame, and a plurality of heat dissipation fins are fixedly connected to the lower surface of the ring frame. The heat dissipation fins are in sliding contact with the outer wall of the heat dissipation pipe, and the top surface of the ring frame is fixedly connected to an annular rack A, and the lower surface of the annular frame is rotatably connected to a polishing rod, and the polishing rod is in frictional contact with the outer wall of the heat dissipation pipe. The top end of the polishing rod is fixedly connected to a transmission wheel, and the outer wall of the heat dissipation pipe is fixedly connected to an annular rack B, and the annular rack B is meshed with the transmission wheel for transmission.

[0011] Preferably, the inner wall scraping mechanism includes a universal joint A, both ends of which are rotatably connected to the heat dissipation pipe, one end of the universal joint A extends through the inner wall of the heat dissipation pipe to the outside and is fixedly connected to a gear A, the gear A is meshed with the annular rack A for transmission, and one side of the gear A is fixedly connected to a gear B.

[0012] Preferably, one end of the universal joint A located in the heat dissipation tube is provided with a spiral scraper rod in sliding cooperation, and the spiral scraper rod is provided in sliding contact with the inner wall of the heat dissipation tube. The outer wall of the upper end of the spiral scraper rod is rotatably connected to a guide rod, and the guide rod is provided in sliding cooperation with the inner wall of the heat dissipation tube. One end of the universal joint A located in the heat dissipation tube is connected and fixed with a concave-convex groove disk, and the inner wall of the concave-convex groove disk is provided in sliding cooperation with one end of the guide rod.

[0013] Preferably, the outer wall of the transmission rod is connected and fixedly provided with a plurality of gear plates in a linear structure, the gear plates are meshed with the gear B for transmission, and the outer wall of the middle portion of the transmission rod is connected and fixedly provided with a driven wheel.

[0014] Preferably, the transmission mechanism includes a motor, the motor is fixedly connected to the inner wall of the waterproof cover, the output end of the motor is fixedly connected to a rotating shaft, the rotating shaft is fixedly connected to a feeding connection with a plurality of worms, and the worms are meshed with a worm wheel for transmission.

[0015] Preferably, a threaded rod is fixedly connected to the rotating shaft, a push-pull frame is threadedly connected to the threaded rod, the other end of the push-pull frame passes through the waterproof cover and the water receiving top seat in sequence and is fixedly connected to the water retaining frame, a universal joint B is fixedly connected to the top end of the rotating shaft, the other end of the universal joint B is rotatably connected to a fixed frame, one end of the fixed frame is fixedly connected to the inner wall of the waterproof cover, one end of the universal joint B is fixedly connected to a driving wheel, and the driving wheel is meshed with the driven wheel for transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the waterproof plate is closed during rainy weather to waterproof the display, rainwater will be filtered through the water filter top and collected into the heat pipe, keeping the water flow clean. This allows the heat dissipation port to be sealed and waterproofed while rainwater flows through the heat pipe, absorbing the heat generated by the equipment inside the waterproof cover. Using rainwater as a heat dissipation medium can reduce dependence on artificial cooling equipment (such as fans, air conditioners, etc.), saving energy. It can prevent external water intrusion while ensuring that the internal equipment can effectively dissipate heat and prevent equipment failure due to overheating.

[0018] By setting an inner wall scraping mechanism in the heat dissipation pipe, when the transmission mechanism drives the waterproof plate to open and close, it will drive the spiral scraping rod to rotate. At the same time, driven by the concave and convex groove plate, the spiral scraping rod will move back and forth up and down to scrape rainwater sediment on the inner wall of the heat dissipation pipe, prevent sediment accumulation, ensure that the heat dissipation pipe always maintains a good heat exchange effect, and thus improve the heat dissipation efficiency of the equipment.

[0019] By arranging heat sinks on the outer wall of the heat pipe, the heat dissipation efficiency can be further improved. At the same time, the rotating and self-rotating polishing rod can grind off the dust attached to the outer wall of the heat pipe when the heat dissipation port is opened to dissipate heat, preventing dust and dirt from affecting the heat dissipation performance. The automatic cleaning function reduces the frequency and difficulty of maintenance, and reduces the operation and maintenance costs in long-term use. By setting a liftable water retaining frame, rainwater on the top of the water filter can be blocked, its falling speed can be slowed down, and the filtering and collection efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a liquid crystal display screen with a waterproof function according to the present invention;

[0021] Figure 2Schematic diagram of partial section of the overall structure of a liquid crystal display screen with waterproof function according to the present invention;

[0022] Figure 3 Schematic diagram of partial section of a part of the structure of a liquid crystal display screen with waterproof function according to the present invention;

[0023] Figure 4 Schematic diagram of sectional view of the water receiving top seat structure of a liquid crystal display screen with waterproof function according to the present invention;

[0024] Figure 5 Schematic diagram of the unfolded waterproof cover structure of a liquid crystal display screen with waterproof function according to the present invention;

[0025] Figure 6 Schematic diagram of sectional view and unfolding of structures such as heat dissipation pipes of a liquid crystal display screen with waterproof function according to the present invention;

[0026] Figure 7 Schematic diagram of the inner wall scraping mechanism structure of a liquid crystal display screen with waterproof function according to the present invention;

[0027] Figure 8 Schematic diagram of the transmission rod structure of a liquid crystal display screen with waterproof function according to the present invention;

[0028] Figure 9 Schematic diagram of the transmission mechanism structure of a liquid crystal display screen with waterproof function according to the present invention.

[0029] In the figure, the markings are: 1, display screen main body; 2, mounting rack; 3, water receiving top seat; 4, waterproof cover; 5, heat dissipation pipe; 6, inner wall scraping mechanism; 7, transmission rod; 8, transmission mechanism; 301, water filtering top; 302, water blocking frame; 401, heat dissipation port; 402, waterproof plate; 403, worm gear; 501, annular frame; 502, heat dissipation fin; 503, annular rack A; 504, grinding rod; 505, transmission wheel; 506, annular rack B; 601, universal joint A; 602, gear A; 603, gear B; 604, spiral wall scraping rod; 605, guide rod; 606, concave-convex groove disc; 701, tooth disc; 702, driven wheel; 801, motor; 802, rotating shaft; 803, worm; 804, threaded rod; 805, push-pull frame; 806, universal joint B; 807, driving wheel; 808, fixing frame. Detailed implementation manner

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0031] As Figures 1-9A liquid crystal display with a waterproof function is shown, including a display body 1, a mounting frame 2 fixedly connected to the display body 1, a water-receiving top seat 3 fixedly connected to the mounting frame 2, a waterproof cover 4 fixedly connected to the rear side of the display body 1, a heat dissipation pipe 5 fixedly connected inside the waterproof cover 4, a plurality of inner wall scraping mechanisms 6 rotatably connected through the heat dissipation pipe 5, a transmission rod 7 rotatably connected inside the waterproof cover 4, and a transmission mechanism 8 fixedly connected inside the waterproof cover 4.

[0032] As Figure 4 shown, a water-filtering top 301 is fixedly connected to the water-receiving top seat 3, and a water-blocking frame 302 is slidably fitted on the water-filtering top 301. A photoelectric sensor is arranged on the water-filtering top 301 to judge the presence of raindrops by emitting a light beam and receiving the reflected light. When raindrops fall into the light beam path of the sensor, they will change the degree of light reflection, resulting in the receiver detecting a change in light intensity. The push-pull frame 805 drives the water-blocking frame 302 to move upward, and then the rainwater falls onto the water-filtering top 301 for filtration and is injected into the heat dissipation pipe 5.

[0033] As Figure 5 shown, a plurality of heat dissipation openings 401 are formed on one side of the waterproof cover 4, a waterproof plate 402 is rotatably connected to the heat dissipation openings 401, and a worm gear 403 is fixedly connected to the middle of the waterproof plate 402. The waterproof plate 402 rotates to block the heat dissipation openings 401.

[0034] As Figure 6 shown, one end of the heat dissipation pipe 5 passes through the inner wall of the waterproof cover 4 and extends into the water-receiving top seat 3, the other end of the heat dissipation pipe 5 passes through the inner wall of the waterproof cover 4 and extends to the lower side, an annular frame 501 is rotatably connected to the outer wall of the heat dissipation pipe 5, a plurality of heat dissipation fins 502 are fixedly connected to the lower surface of the annular frame 501, the heat dissipation fins 502 are in sliding contact with the outer wall of the heat dissipation pipe 5, an annular rack A503 is fixedly connected to the top surface of the annular frame 501, a polishing rod 504 is rotatably connected to the lower surface of the annular frame 501, the polishing rod 504 is in frictional contact with the outer wall of the heat dissipation pipe 5, a transmission wheel 505 is fixedly connected to the top end of the polishing rod 504, an annular rack B506 is fixedly connected to the outer wall of the heat dissipation pipe 5, and the annular rack B506 is in meshing transmission with the transmission wheel 505. The gear B603 will drive the connected gear A602 to rotate, so that the gear A602 drives the annular frame 501 connected to the annular rack A503 to rotate. At this time, under the action of the annular rack B506, the polishing rod 504 connected to the transmission wheel 505 will rotate, so that the polishing rod 504 polishes the surface of the heat dissipation pipe 5.

[0035] As Figure 7As shown, the inner wall scraping mechanism 6 includes a universal joint A601. Both ends of the universal joint A601 are rotatably connected to the heat dissipation pipe 5. One end of the universal joint A601 passes through the inner wall of the heat dissipation pipe 5 and extends to the outside, and is fixedly connected with a gear A602. The gear A602 is meshed and driven with the annular rack A503. One side of the gear A602 is fixedly connected with a gear B603.

[0036] One end of the universal joint A601 located inside the heat dissipation pipe 5 is slidably fitted with a spiral wall scraping rod 604. The spiral wall scraping rod 604 is in sliding contact with the inner wall of the heat dissipation pipe 5. The outer wall of the upper end of the spiral wall scraping rod 604 is rotatably connected with a guide rod 605. The guide rod 605 is slidably fitted with the inner wall of the heat dissipation pipe 5. One end of the universal joint A601 located inside the heat dissipation pipe 5 is fixedly connected with a concave-convex groove disc 606. The inner wall of the concave-convex groove disc 606 is slidably fitted with one end of the guide rod 605. The gear A602 will drive the connected universal joint A601 to rotate, so that the universal joint A601 drives the spiral wall scraping rod 604 to rotate self-rotation, and scrapes and cleans the inner wall of the heat dissipation pipe 5. At the same time, the universal joint A601 will drive the connected concave-convex groove disc 606 to rotate. At this time, the concave-convex groove disc 606 will drive the guide rod 605 to move up and down, so that the guide rod 605 drives the rotating spiral wall scraping rod 604 to move up and down.

[0037] As Figure 8 As shown, a plurality of tooth discs 701 are fixedly connected to the outer wall of the transmission rod 7 in a linear structure. The tooth discs 701 are meshed and driven with the gear B603. The outer wall of the middle part of the transmission rod 7 is fixedly connected with a driven wheel 702.

[0038] As Figure 9 As shown, the transmission mechanism 8 includes a motor 801. The motor 801 is fixedly connected to the inner wall of the waterproof cover 4. The output end of the motor 801 is fixedly connected with a rotating shaft 802. A plurality of worm gears 803 are fixedly connected to the rotating shaft 802 for feeding. The worm gears 803 are meshed and driven with the worm wheels 403. The motor 801 is used to drive the connected rotating shaft 802 to rotate, so that the rotating shaft 802 drives the connected worm gears 803 to rotate, so that the worm gears 803 can drive the worm wheels 403 to rotate.

[0039] A threaded rod 804 is fixedly connected to the rotating shaft 802. A push-pull frame 805 is threadedly connected to the threaded rod 804. The other end of the push-pull frame 805 sequentially passes through the waterproof cover 4 and the water-receiving top seat 3 and is fixedly connected to the water-blocking frame 302. The top end of the rotating shaft 802 is fixedly connected to a universal joint B806. The other end of the universal joint B806 is rotatably connected to a fixed frame 808. One end of the fixed frame 808 is fixedly connected to the inner wall of the waterproof cover 4. One end of the universal joint B806 is fixedly connected to a driving wheel 807. The driving wheel 807 is meshed and driven with a driven wheel 702. When the rotating shaft 802 rotates, it will drive the connected threaded rod 804 to rotate, causing the threaded rod 804 to drive the push-pull frame 805 to move upward. When the rotating shaft 802 rotates, it will drive the connected universal joint B806 to rotate, causing the universal joint B806 to drive the connected driving wheel 807 to rotate.

[0040] Working principle: When it rains, the presence of raindrops is judged by the photoelectric sensor emitting a light beam and receiving the reflected light. Then, the motor 801 is used to drive the connected rotating shaft 802 to rotate, causing the rotating shaft 802 to drive the connected worm 803 to rotate, enabling the worm 803 to drive the worm wheel 403 to rotate, causing the worm wheel 403 to drive the connected waterproof plate 402 to rotate, blocking the heat dissipation port 401, and preventing rainwater from entering the waterproof cover 4, thus realizing the waterproofing of the display screen main body 1;

[0041] At the same time, when the rotating shaft 802 rotates, it will drive the connected threaded rod 804 to rotate, causing the threaded rod 804 to drive the push-pull frame 805 to move upward, causing the push-pull frame 805 to drive the water-blocking frame 302 to move upward. Then, the rainwater falls on the water-filtering top 301 for filtering and is injected into the heat dissipation pipe 5 to dissipate heat inside the waterproof cover 4;

[0042] At the same time, when the rotating shaft 802 rotates, it will drive the connected universal joint B806 to rotate, causing the universal joint B806 to drive the connected driving wheel 807 to rotate, causing the driving wheel 807 to drive the driven wheel 702 to rotate, causing the driven wheel 702 to drive the transmission rod 7 to rotate. At this time, the transmission rod 7 will drive the connected tooth disc 701 to rotate, causing the tooth disc 701 to drive the gear B603 to rotate;

[0043] Then, the gear B603 will drive the connected gear A602 to rotate, causing the gear A602 to drive the annular frame 501 connected to the annular rack A503 to rotate. At this time, under the action of the annular rack B506, the grinding rod 504 connected to the transmission wheel 505 will rotate, causing the grinding rod 504 to grind the surface of the heat dissipation pipe 5;

[0044] Meanwhile, the gear A602 will drive the connected universal joint A601 to rotate, causing the universal joint A601 to drive the spiral scraping rod 604 to rotate self - rotatably, scraping and cleaning the inner wall of the heat dissipation pipe 5. At the same time, the universal joint A601 will drive the connected concave - convex groove disc 606 to rotate. At this time, the concave - convex groove disc 606 will drive the guide rod 605 to move up and down, causing the guide rod 605 to drive the rotating spiral scraping rod 604 to move up and down. Then the rainwater flows out of the heat dissipation pipe 5, taking away the heat.

[0045] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid crystal display with a waterproof function, comprising a display screen body (1), characterized in that: The display screen body (1) is connected and fixedly provided with a mounting frame (2), the mounting frame (2) is connected and fixedly provided with a water receiving top seat (3), the rear side of the display screen body (1) is connected and fixedly provided with a waterproof cover (4), a heat dissipation pipe (5) is connected and fixedly provided in the waterproof cover (4), a plurality of inner wall scraping mechanisms (6) are rotatably provided through the heat dissipation pipe (5), a transmission rod (7) is rotatably provided in the waterproof cover (4), and a transmission mechanism (8) is connected and fixedly provided in the waterproof cover (4). A water filter top (301) is fixedly connected to the water receiving top seat (3), and a water retaining frame (302) is slidably provided on the water filter top (301). The transmission mechanism (8) includes a motor (801), the motor (801) is fixedly connected to the inner wall of the waterproof cover (4), the output end of the motor (801) is fixedly connected to a rotating shaft (802), the rotating shaft (802) is fixedly connected to the feeding connection with a plurality of worms (803), the worms (803) are meshed with the worm wheel (403) for transmission, The rotating shaft (802) is fixedly connected with a threaded rod (804), and the threaded rod (804) is threadedly connected with a push-pull frame (805). The other end of the push-pull frame (805) passes through the waterproof cover (4) and the water receiving top seat (3) in sequence and is fixedly connected with the water retaining frame (302). The top end of the rotating shaft (802) is fixedly connected with a universal joint B (806), and the other end of the universal joint B (806) is rotatably connected with a fixed frame (808). One end of the fixed frame (808) is fixedly connected with the inner wall of the waterproof cover (4), and one end of the universal joint B (806) is fixedly connected with a driving wheel (807). The driving wheel (807) is meshed with the driven wheel (702) for transmission. A photoelectric sensor is provided on the water filter top (301) to determine the presence of raindrops by emitting a light beam and receiving reflected light. When raindrops fall into the sensor's light beam path, the degree of light reflection changes, and the receiver detects the change in light intensity. The push-pull frame (805) drives the water retaining frame (302) to move upward, and rainwater falls on the water filter top (301) and is filtered before being injected into the heat dissipation pipe (5).

2. A liquid crystal display with a waterproof function according to claim 1, characterized in that: A plurality of heat dissipation openings (401) are provided on one side of the waterproof cover (4); a waterproof plate (402) is rotatably connected to the heat dissipation opening (401); and a worm gear (403) is fixedly connected to the middle of the waterproof plate (402).

3. A liquid crystal display with a waterproof function according to claim 1, characterized in that: One end of the heat dissipation pipe (5) extends through the inner wall of the waterproof cover (4) into the water receiving top seat (3), and the other end of the heat dissipation pipe (5) extends through the inner wall of the waterproof cover (4) to the lower side. An annular frame (501) is rotatably connected to the outer wall of the heat dissipation pipe (5). A plurality of heat dissipation fins (502) are fixedly connected to the lower surface of the annular frame (501). The heat dissipation fins (502) are in sliding contact with the outer wall of the heat dissipation pipe (5). An annular rack A (503) is fixedly connected to the top surface of the annular frame (501). A polishing rod (504) is rotatably connected to the lower surface of the annular frame (501). The polishing rod (504) is in frictional contact with the outer wall of the heat dissipation pipe (5). A transmission wheel (505) is fixedly connected to the top end of the polishing rod (504). An annular rack B (506) is fixedly connected to the outer wall of the heat dissipation pipe (5). The annular rack B (506) is in meshing transmission with the transmission wheel (505).

4. A liquid crystal display with a waterproof function according to claim 1, characterized in that: The inner wall scraping mechanism (6) includes a universal joint A (601). Both ends of the universal joint A (601) are rotatably connected to the heat dissipation pipe (5). One end of the universal joint A (601) extends through the inner wall of the heat dissipation pipe (5) to the outside and is fixedly connected with a gear A (602). The gear A (602) is in meshing transmission with the annular rack A (503). A gear B (603) is fixedly connected to one side of the gear A (602).

5. A liquid crystal display with a waterproof function according to claim 4, characterized in that: A spiral wall scraping rod (604) is slidably fitted at one end of the universal joint A (601) located inside the heat dissipation pipe (5). The spiral wall scraping rod (604) is in sliding contact with the inner wall of the heat dissipation pipe (5). A guide rod (605) is rotatably connected to the outer wall of the upper end of the spiral wall scraping rod (604). The guide rod (605) is slidably fitted with the inner wall of the heat dissipation pipe (5). An uneven groove disk (606) is fixedly connected to one end of the universal joint A (601) located inside the heat dissipation pipe (5). The inner wall of the uneven groove disk (606) is slidably fitted with one end of the guide rod (605).

6. A liquid crystal display with a waterproof function according to claim 1, characterized in that: A plurality of tooth disks (701) are fixedly connected to the outer wall of the transmission rod (7) in a linear structure. The tooth disks (701) are in meshing transmission with the gear B (603). A driven wheel (702) is fixedly connected to the outer wall of the middle part of the transmission rod (7).

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