Extremely cold rainy and snowy day protection device for solar photovoltaic panel

Abstract

The invention discloses an extremely cold rainy and snowy day protection device for a solar photovoltaic panel, and relates to the technical field of photovoltaic panel protection. The extremely cold rainy and snowy day protection device for the solar photovoltaic panel comprises a storage plate, the top of the storage plate is provided with a photovoltaic panel body, and the top of the storage plate is rotationally connected with a protection plate driven by a servo motor; the top of the protection plate is fixedly connected with a storage base, the interior of the storage base is rotationally connected with a reciprocating lead screw driven by a servo motor, and the outer side of the reciprocating lead screw is connected with a sliding block by arranging threads. According to the extremely cold rainy and snowy day protection device for the solar photovoltaic panel, a reciprocating lead screw driven by a servo motor is started and matched with a storage base, a sliding block, a first fixing rod, a limiting rod, a torsional spring, a limiting plate, a gravity iron column and a magnetic adsorption block, so that the device uses the two ends of a cleaning plate to conduct corresponding snow removal operation in sequence, and the snow removal effect of the device is improved; therefore, the overall protection effect of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic panel protection, in particular to an extremely cold rainy and snowy weather protection device for solar photovoltaic panels. Background Art

[0002] Photovoltaic power generation is a technology that uses the photovoltaic effect at the interface of semiconductors to directly convert sunlight into electrical energy. It primarily consists of three main components: solar panels, controllers, and inverters, with the majority of these components being electronic components. Solar cells are connected in series and then packaged and protected to form large-area solar modules. Combined with components such as power controllers, these form photovoltaic power generation devices, of which the solar panel is the most crucial component.

[0003] The existing solar photovoltaic panel protection device for extremely cold rain and snow includes a storage plate and a photovoltaic panel. A support block is fixedly mounted on the upper surface of the storage plate. A retractable plate and a fixed plate are provided on the upper surface of the storage plate. A flip assembly is provided on the side of the support block for driving the retractable plate to retract and retract while driving the retractable plate and the fixed plate to flip to cover the photovoltaic panel. The flip assembly includes a mounting plate and a transmission module. A toothed plate is fixedly connected to the side of the retractable plate close to the support block, and a gear corresponding to the toothed plate is fixedly provided on the side of the mounting plate away from the support block. In the above application document, the retractable plate is driven to extend from the bottom of the fixed plate by the flip assembly, and the photovoltaic panel is protected under the retractable plate and the fixed plate with the cooperation of the baffle to prevent damage to the photovoltaic panel caused by severe weather. However, when the existing solar photovoltaic panel protection device for extremely cold rain and snow uses a cleaning plate to perform the corresponding snow removal operation, the cleaning plate used on one side makes the cleaning effect of the device poor, thereby affecting the overall protection effect of the device. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention provides a device for protecting solar photovoltaic panels from extreme cold, rain, and snow, addressing the issues raised in the aforementioned background art. To achieve the above objectives, the present invention employs the following technical solutions: A device for protecting solar photovoltaic panels from extreme cold, rain, and snow, comprising a storage plate, the top of which is mounted with a photovoltaic panel body, and a protective plate rotatably connected to the top of the storage plate, which is driven by a servo motor; The top of the protective plate is fixedly connected to a storage seat, and the interior of the storage seat is rotatably connected to a reciprocating screw driven by a servo motor. The outer side of the reciprocating screw is connected to a sliding block via a threaded arrangement, and the side of the sliding block is rotatably connected to a cleaning plate. The side of the storage seat is fixedly connected to a fixing rod 1, and the side of the fixing rod 1 is fixedly connected to a limiting rod. The bottom of the limiting rod is rotatably connected to a limiting plate via a torsion spring. The interior of the cleaning plate is equipped with a gravity iron column, and the bottom side of the inner wall of the protective plate is equipped with a magnetic adsorption block. The top of the protective plate is equipped with a spray assembly for spraying saline solution, and the top of the protective plate is equipped with a limiting assembly that limits the spraying frequency of the saline solution. Through the arrangement of some parts, the device uses the two ends of the cleaning plate to perform corresponding snow removal operations in sequence, thereby improving the snow removal effect of the device and thus improving the overall protective effect of the device.

[0005] Preferably, the sliding block is located inside the storage seat and is in a sliding connection with the storage seat.

[0006] Preferably, two cleaning plates are provided, and the two cleaning plates are symmetrically distributed with respect to the sliding block.

[0007] Preferably, the spray assembly includes a second fixed rod, the outer side of the reciprocating screw is connected to a bevel gear, the side of the second fixed rod is rotatably connected to a penetrating rotating shaft, the bottom of the rotating shaft is fixedly connected to a second bevel gear, the outer side of the rotating shaft is fixedly connected to a first sprocket, the outer side of the first sprocket is equipped with a chain, the side of the storage plate is equipped with a liquid pump, the side of the first fixed rod is fixedly connected to a pipe, a hose is installed between the pipe and the liquid pump, the bottom of the pipe is rotatably connected to a pipe joint, the outer side of the pipe joint is fixedly connected to a second sprocket, and the bottom of the pipe joint is fixedly connected to a spray head. By setting up the spray assembly, the salt water solution can be rotated and sprayed to the top of the protective plate, thereby increasing the coverage of the salt water solution on the top of the protective plate and further improving the snow removal effect of the device.

[0008] Preferably, the second bevel gear is located at the top of the first bevel gear and is in meshing state with the first bevel gear.

[0009] Preferably, one end of the chain away from the sprocket one is assembled on the outer side of the sprocket two.

[0010] Preferably, the limiting assembly includes a hydraulic chamber, one end of which is slidably connected to a force-bearing rod, the other end of which is slidably connected to a curved rod, the side of which is fitted with a spring, the interior of the pipe being rotatably connected to a rotating block extending therethrough, the outer side of the rotating block being fixedly connected to a force-bearing plate, and the bottom of the rotating block being fixedly connected to a blocking block. By configuring the limiting assembly, a saline solution can be intermittently sprayed onto the top of the protective plate, improving snow removal effectiveness while reducing saline solution waste, making the device easier to use.

[0011] Preferably, the force-bearing plate is located on the side of the arc-shaped rod and is fixed to the arc-shaped rod.

[0012] The present invention provides a device for protecting solar photovoltaic panels from extreme cold, rain, and snow. It has the following beneficial effects: (1) The solar photovoltaic panel protection device for extremely cold rain and snow uses a reciprocating screw driven by a servo motor, which is combined with a storage seat, a sliding block, a fixed rod, a limiting rod, a torsion spring, a limiting plate, a gravity iron column and a magnetic adsorption block. The device uses the two ends of the cleaning plate to perform corresponding snow removal operations in sequence, thereby improving the snow removal effect of the device and thus improving the overall protection effect of the device.

[0013] (2) The solar photovoltaic panel is used for an extremely cold rainy and snowy weather protection device. When the reciprocating screw is rotated, the fixed rod 2, bevel gear 1, rotating shaft, bevel gear 2, sprocket 1, chain, liquid pump, pipe, hose, pipe joint, sprocket 2 and nozzle can rotate and spray the brine solution to the top position of the protection plate, thereby increasing the coverage of the brine solution on the top of the protection plate and further improving the snow removal effect of the device.

[0014] (3) The solar photovoltaic panel is provided with an extremely cold rain and snow protection device. When the sliding block moves back and forth in the horizontal direction and moves toward the force-bearing rod, the hydraulic chamber, the arc rod, the spring, the rotating block, the force-bearing plate and the blocking block can be used to intermittently spray a salt water solution onto the top of the protection plate, thereby improving the snow removal effect while reducing the waste of the salt water solution, making the device easier to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of some parts of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5It is a schematic diagram of the three-dimensional structure of the ejection assembly of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 A schematic diagram of the three-dimensional structure of the restriction component of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C in the middle.

[0016] In the picture: 100, storage plate; 200, photovoltaic panel body; 300, protective plate; 401, storage seat; 402, reciprocating screw; 403, sliding block; 404, cleaning plate; 405, fixing rod 1; 406, limiting rod; 407, torsion spring; 408, limiting plate; 409, gravity iron column; 410, magnetic adsorption block; 500, spray assembly; 501, fixed rod 2; 502, bevel gear 1; 503, rotating shaft; 504, bevel gear 2; 505, sprocket 1; 506, chain; 507, liquid pump; 508, pipe; 509, hose; 510, pipe joint; 511, sprocket 2; 512, spray head; 600, limiting assembly; 601, hydraulic chamber; 602, force rod; 603, arc rod; 604, spring; 605, rotating block; 606, force plate; 607, blocking block. DETAILED DESCRIPTION

[0017] 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 part of the embodiments of the present invention, rather than all the embodiments.

[0018] For example 1, please refer to Figures 1-4 A solar photovoltaic panel protection device for extremely cold, rainy and snowy weather includes a storage plate 100, a photovoltaic panel body 200 is mounted on the top of the storage plate 100, and a protection plate 300 driven by a servo motor is rotatably connected to the top of the storage plate 100; The top of the protective plate 300 is fixedly connected to a storage seat 401. A reciprocating screw 402 driven by a servo motor is rotatably connected to the interior of the storage seat 401. A sliding block 403 is threadedly connected to the outside of the reciprocating screw 402. The sliding block 403 is located inside the storage seat 401 and is in a sliding connection with the storage seat 401. A cleaning plate 404 is rotatably connected to the side of the sliding block 403. Two cleaning plates 404 are provided, and the two cleaning plates 404 are symmetrically distributed about the sliding block 403. When the reciprocating screw 402 driven by the servo motor is activated, the reciprocating screw 402 begins to rotate. Because the sliding block 403, which is threadedly assembled on the reciprocating screw 402, is restricted by the storage seat 401, the sliding block 403 reciprocates in the horizontal direction, and the sliding block 403 then drives the cleaning plate 404, which is rotatably connected to it, to reciprocate in the horizontal direction.

[0019] The side of the storage seat 401 is fixedly connected to a fixing rod 405, the side of the fixing rod 405 is fixedly connected to a limiting rod 406, the bottom of the limiting rod 406 is rotatably connected to a limiting plate 408 through a torsion spring 407, the interior of the cleaning plate 404 is equipped with a gravity iron column 409, and the bottom side of the inner wall of the protective plate 300 is equipped with a magnetic adsorption block 410. When the cleaning plate 404 moves to the limiting rod 406, the cleaning plate 404 is squeezed by the limiting plate 408. Because the limiting plate 408 is restricted by the limiting rod 406 at this time, it cannot rotate with the torsion spring 407 as the axis, so that the cleaning plate 404 rotates under the action of the limiting plate 408, and the cleaning plate 404 rotates more than 90 degrees and less than 270 degrees under the action of its own inertia. The gravity iron column 409 in the cleaning plate 404 is then moved to the other side under the attraction of the magnetic adsorption block 410, thereby maintaining the cleaning plate 404 in a state of rotation of 180 degrees. At this time, the other side of the cleaning plate 404 The cleaning plate 404 rotates to a position close to the top of the protective plate 300; and when the reciprocating screw rod 402 continues to rotate, driving the sliding block 403 to reset, the cleaning plate 404 can squeeze the limiting plate 408 from the other side. Because the attraction between the gravity iron column 409 and the magnetic adsorption block 410 is greater than the torsion force of the torsion spring 407 itself, when the cleaning plate 404 squeezes the limiting plate 408, the limiting plate 408 rotates around the torsion spring 407 as the axis, thereby removing the restriction on the cleaning plate 404 and allowing the cleaning plate 404 to reset along with the sliding block 403; in this way, the two sides of the cleaning plate 404 can sequentially remove snow from the top side of the protective plate 300. This improves the snow removal effect of the device, thereby improving the overall protection effect of the device.

[0020] The top of the protection plate 300 is equipped with a spray assembly 500 for spraying saline solution, and the top of the protection plate 300 is equipped with a limiting assembly 600 for limiting the spraying frequency of the saline solution.

[0021] When in use, the reciprocating screw rod 402 driven by the servo motor is activated, so that the reciprocating screw rod 402 starts to rotate. Because the sliding block 403 assembled on the reciprocating screw rod 402 by the thread is restricted by the storage seat 401, the sliding block 403 moves back and forth in the horizontal direction, and the sliding block 403 then drives the cleaning plate 404 connected to it to move back and forth in the horizontal direction. When the cleaning plate 404 moves to the limiting rod 406, the cleaning plate 404 is squeezed by the limiting plate 408. Because the limiting plate 408 is restricted by the limiting rod 406 at this time, it cannot rotate with the torsion spring 407 as the axis, so that the cleaning plate 404 rotates under the action of the limiting plate 408, and the cleaning plate 404 rotates more than 90 degrees and less than 270 degrees under the action of its own inertia. The gravity iron in the cleaning plate 404 The column 409 then moves to the other side under the attraction of the magnetic adsorption block 410, thereby maintaining the cleaning plate 404 in a state of being rotated 180 degrees. At this time, the other side of the cleaning plate 404 rotates to a position close to the top of the protective plate 300; and when the reciprocating screw rod 402 continues to rotate, driving the sliding block 403 to reset, the cleaning plate 404 can squeeze the limiting plate 408 from the other side, and because the attraction between the gravity iron column 409 and the magnetic adsorption block 410 is greater than the torsion of the torsion spring 407 itself, when the cleaning plate 404 squeezes the limiting plate 408, the limiting plate 408 rotates with the torsion spring 407 as the axis, thereby canceling the restriction on the cleaning plate 404, so that the cleaning plate 404 can be reset with the sliding block 403; in this way, the two sides of the cleaning plate 404 can perform snow removal operations on the top side of the protective plate 300 in turn.

[0022] For example 2, please refer to Figures 1-6 Based on the first embodiment, the ejection assembly 500 includes a second fixed rod 501. The outer side of the reciprocating screw 402 is transmission-connected to a first bevel gear 502. The side of the second fixed rod 501 is rotationally connected to a through-shaft 503. The bottom of the shaft 503 is fixedly connected to a second bevel gear 504. The second bevel gear 504 is located at the top of the first bevel gear 502 and is in meshing state with the first bevel gear 502. When the reciprocating screw 402 rotates, the first bevel gear 502 transmission-connected to the reciprocating screw 402 is driven to rotate. The first bevel gear 502 drives the second bevel gear 504 meshed with the first bevel gear 502 to rotate. The second bevel gear 504 drives the rotation shaft 503 fixedly connected to the second bevel gear 504.

[0023] The outer side of the rotating shaft 503 is fixedly connected to a sprocket 1 505, the outer side of the sprocket 1 505 is equipped with a chain 506, the side of the storage plate 100 is equipped with a liquid pump 507, the side of the fixed rod 1 405 is fixedly connected to a pipe 508, a hose 509 is installed between the pipe 508 and the liquid pump 507, the bottom of the pipe 508 is rotatably connected to a pipe joint 510, the outer side of the pipe joint 510 is fixedly connected to a sprocket 2 511, the end of the chain 506 away from the sprocket 1 505 is equipped on the outer side of the sprocket 2 511, and the bottom of the pipe joint 510 is fixedly connected to a nozzle 512. When the rotating shaft 503 rotates, it drives the sprocket 1 505 fixedly connected to the rotating shaft 503 to rotate. At this time, the liquid pump 507 is activated to introduce saline solution into the pipe 508 through the hose 509. The chain 506 assembled on the outside of the sprocket 1 505 then rotates the sprocket 2 511, which is connected to the sprocket 1 505 through the chain 506. The sprocket 2 511 then drives the pipe joint 510 fixedly connected to the sprocket 2 511 to rotate. The pipe joint 510 drives the nozzle 512 fixed at its bottom to rotate, and the saline solution injected from the pipe 508 into the pipe joint 510 is sprayed onto the top of the protective plate 300 through the nozzle 512. This increases the coverage of the saline solution on the top of the protective plate 300, further improving the snow removal effect of the device.

[0024] When in use, based on the first embodiment, when the reciprocating screw rod 402 rotates, it can drive the bevel gear 1 502 connected to the reciprocating screw rod 402 to rotate, so that the bevel gear 1 502 drives the bevel gear 2 504 meshing with the bevel gear 1 502 to rotate, and the bevel gear 2 504 drives the rotating shaft 503 fixedly connected to the bevel gear 2 504 to rotate, so that the rotating shaft 503 drives the sprocket 1 505 fixedly connected to the rotating shaft 503 to rotate. At this time, the liquid pump 507 is enabled to pump liquid to the liquid pump through the hose 509. The saline solution is introduced into the pipe 508, and then cooperates with the chain 506 assembled on the outside of the sprocket 1 505 to rotate the sprocket 2 511, which is connected to the sprocket 1 505 through the chain 506. The sprocket 2 511 then drives the pipe joint 510 fixedly connected to the sprocket 2 511 to rotate, so that the pipe joint 510 drives the nozzle 512 fixed at the bottom thereof to rotate, and the saline solution injected from the pipe 508 into the pipe joint 510 is rotated and sprayed to the top position of the protective plate 300 through the nozzle 512.

[0025] For example three, please refer to Figures 1-8Based on the first and second embodiments, the limiting assembly 600 includes a hydraulic chamber 601, one end of which is slidably connected to a force-bearing rod 602, and the other end of which is slidably connected to a curved rod 603. A spring 604 is mounted on the side of the force-bearing rod 602. When the sliding block 403 reciprocates horizontally and moves toward the force-bearing rod 602, it compresses the force-bearing rod 602 and drives it sideways. This, in conjunction with the hydraulic chamber 601 slidably connected to the force-bearing rod 602, increases the pressure within the hydraulic chamber 601, driving the curved rod 603 slidably connected to the hydraulic chamber 601 to move.

[0026] A rotating block 605 is rotatably connected to the interior of the pipe 508 and extends therethrough. A force-bearing plate 606 is fixedly connected to the outside of the rotating block 605. The force-bearing plate 606 is located to the side of the curved rod 603 and is fixed to the curved rod 603. A blocking block 607 is fixedly connected to the bottom of the rotating block 605. When the curved rod 603 moves, it causes the force-bearing plate 606, which is fixedly connected to the curved rod 603, to rotate. The force-bearing plate 606 causes the rotating block 605, which is fixedly connected to the force-bearing plate 606, to rotate. This causes the rotating block 605 to rotate the blocking block 607, which is fixedly connected to the rotating block 605. This opens the pipe 508, which was originally closed by the blocking block 607, and allows the saline solution to be sprayed out.

[0027] When the sliding block 403 continues to move away from the force-bearing rod 602, the force-bearing rod 602 is no longer restrained by the sliding block 403 and is reset under the action of the spring 604. Similarly, the blocking block 607 is reset, and the pipe 508 is restored to a closed state. In this way, the salt water solution can be intermittently sprayed onto the top of the protective plate 300. This improves the snow removal effect while reducing the waste of the salt water solution, making the device easier to use.

[0028] When in use, based on the first and second embodiments, when the sliding block 403 moves back and forth in the horizontal direction, and the sliding block 403 moves toward the force-bearing rod 602, the force-bearing rod 602 can be squeezed and driven to move sideways, and the hydraulic chamber 601 slidably connected to the force-bearing rod 602 is cooperated with, so that the pressure in the hydraulic chamber 601 increases, and the arc rod 603 slidably connected to the hydraulic chamber 601 is driven to move, so that the arc rod 603 drives the force-bearing plate 606 fixedly connected to the arc rod 603 to rotate, and the force-bearing plate 606 drives the force-bearing plate 606 fixedly connected to the force-bearing plate 606 The fixedly connected rotating block 605 rotates, causing the rotating block 605 to drive the blocking block 607 fixedly connected to the rotating block 605 to rotate, thereby turning the pipe 508 originally closed by the blocking block 607 into an open state, thereby spraying the saline solution; when the sliding block 403 continues to move away from the force-bearing rod 602, the force-bearing rod 602 loses the restriction of the sliding block 403 and is reset under the action of the spring 604. Similarly, the blocking block 607 is reset, and the pipe 508 is restored to the closed state; in this way, the saline solution can be intermittently sprayed toward the top of the protective plate 300.

[0029] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A solar photovoltaic panel protection device for extremely cold rain and snow, comprising a storage plate (100), a photovoltaic panel body (200) being mounted on the top of the storage plate (100), and a protection plate (300) being rotatably connected to the top of the storage plate (100) and driven by a servo motor; Its characteristics are: The top of the protective plate (300) is fixedly connected to a storage seat (401), the interior of the storage seat (401) is rotatably connected to a reciprocating screw (402) driven by a servo motor, the outer side of the reciprocating screw (402) is connected to a sliding block (403) by providing a thread, the side of the sliding block (403) is rotatably connected to a cleaning plate (404), the side of the storage seat (401) is fixedly connected to a fixed rod (405), and the side of the fixed rod (405) is fixedly connected to a limited The limiting rod (406) is rotatably connected to the limiting plate (408) at the bottom thereof by means of a torsion spring (407), the interior of the cleaning plate (404) is equipped with a gravity iron column (409), the bottom side of the inner wall of the protective plate (300) is equipped with a magnetic adsorption block (410), the top of the protective plate (300) is equipped with a spraying assembly (500) for spraying a saline solution, and the top of the protective plate (300) is equipped with a limiting assembly (600) for limiting the spraying frequency of the saline solution.

2. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 1, characterized in that: The sliding block (403) is located inside the storage seat (401) and is in a sliding connection with the storage seat (401).

3. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 1, characterized in that: Two cleaning plates (404) are provided, and the two cleaning plates (404) are symmetrically distributed with respect to the sliding block (403).

4. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 1, characterized in that: The ejection assembly (500) includes a second fixed rod (501), the outer side of the reciprocating screw (402) is connected to a bevel gear (502), the side of the second fixed rod (501) is rotatably connected to a through-going rotating shaft (503), the bottom of the rotating shaft (503) is fixedly connected to a bevel gear (504), the outer side of the rotating shaft (503) is fixedly connected to a sprocket (505), the outer side of the sprocket (505) is equipped with a chain (506), and the The side of the object plate (100) is equipped with a liquid pump (507), the side of the fixing rod (405) is fixedly connected to a pipe (508), a hose (509) is installed between the pipe (508) and the liquid pump (507), the bottom of the pipe (508) is rotatably connected to a pipe joint (510), the outer side of the pipe joint (510) is fixedly connected to a sprocket (511), and the bottom of the pipe joint (510) is fixedly connected to a nozzle (512).

5. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 4, characterized in that: The bevel gear 2 (504) is located at the top of the bevel gear 1 (502) and is in meshing state with the bevel gear 1 (502).

6. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 4, characterized in that: One end of the chain (506) away from the sprocket one (505) is assembled at an outer position of the sprocket two (511).

7. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 1, characterized in that: The limiting assembly (600) includes a hydraulic chamber (601), one end of the hydraulic chamber (601) is slidably connected to a force-bearing rod (602), the other end of the hydraulic chamber (601) is slidably connected to an arc-shaped rod (603), a side of the force-bearing rod (602) is equipped with a spring (604), the interior of the pipe (508) is rotatably connected to a rotating block (605) passing through, the outer side of the rotating block (605) is fixedly connected to a force-bearing plate (606), and the bottom of the rotating block (605) is fixedly connected to a blocking block (607).

8. The extremely cold rain and snow protection device for solar photovoltaic panels according to claim 7, characterized in that: The force-bearing plate (606) is located on the side of the arc-shaped rod (603) and is in a fixed state with the arc-shaped rod (603).

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