A rodent-repelling device targeting rat trails in residential areas

Abstract

This invention relates to the field of rodent control, specifically to a rodent-repelling device for rodent trails in residential communities. The invention includes a drive shaft, with several guide rods circumferentially fixed to one end of the drive shaft, and a rodent repeller connected to the other end. Several wind-facing plates are provided at the ends of the guide rods away from the drive shaft. A guide vane is fixedly connected to the side of the wind-facing plate near the guide rod, and the guide vane is inclined, with the side of the guide vane away from the drive shaft being lower than the side near the drive shaft. The wind-facing plate, higher than the drive shaft, drives the drive shaft to rotate under the pressure of flue gas. The guide vane directs grease condensed on the wind-facing plate away from the drive shaft. The drive shaft drives the rodent repeller to perform its rodent-repelling function. Using the technical solution of this invention, rodents are repelled by using flue gas generated from the main exhaust duct at the top of a residential building as the driving force, and the probability of the drive shaft being clogged by grease from the flue gas is reduced.

Description

Technical Field

[0001] This invention relates to the field of rodent control technology, and more specifically, to a rodent control device for rodent trails in residential areas. Background Technology

[0002] The communal chimney in residential buildings is a vertical channel connecting the kitchen exhaust fans of each household to the outside, its main function being to centrally discharge cooking fumes to the top of the building. However, this vertical channel also provides an ideal migration route for rats. Rats have strong climbing abilities and can climb vertically up and down the inner wall of the chimney, entering residents' homes through the exhaust vents on each floor, causing a series of problems. For example, rats may move around in the ceiling and chimney cavities, making noise that disturbs residents' normal lives; secondly, rats have a gnawing habit, which may damage the pipes and exhaust fan equipment in the chimney, and even cause electrical malfunctions or fire hazards.

[0003] The common flue outlet on the roof is usually a large-diameter vertical pipe opening. To prevent rainwater and debris from entering, a metal or concrete "flue cap" is typically installed above this outlet. However, there are often gaps between this flue cap and the pipe opening, and although the flue cap's grille is designed to prevent rodents, the gaps are still quite large. If the grille gaps were too small, they would easily become clogged by grease and grime, allowing even small rats to squeeze through. Once inside the flue, rats can reach the connection between each household's kitchen range hood duct and the common flue. This connection usually has a backflow preventer. Rats can either open the backflow preventer when it is open or push it open themselves to enter the corrugated flexible hose connecting the range hood to the wall. The soft texture of the flexible hose makes it easy for rats to chew through, allowing them to enter the residents' homes.

[0004] In existing technologies, there are methods that utilize large-scale catering fumes to drive a fan at the flue gas outlet, recovering the kinetic energy generated by the fumes. This could potentially be used to power rodent-repelling devices for continuous operation. However, in practice, the fumes in the flue still contain a certain amount of grease. Directly using fumes to drive the fan would cause the fan shaft to become clogged with grease. Furthermore, the grease would also affect the use of rodent-repelling tools such as rodent-repelling lights, for example, affecting the light emitted by the lights. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a rodent-repelling device for rodent trails in residential areas. This device uses the smoke generated from the main exhaust duct at the top of the residential building as a driving force to repel rodents and can reduce the probability of the drive shaft being clogged with oil from the smoke.

[0006] The present invention is achieved through the following technical solution: a rat repelling device for rat trails in a residential area, including a drive shaft, a plurality of guide rods are fixedly connected to one end of the drive shaft in a circumferential direction, a rat repellent is connected to the other end of the drive shaft, a plurality of wind-facing plates are provided at the end of the guide rods away from the drive shaft, a flow guide plate is fixedly connected to the side of the wind-facing plate near the guide rod, the flow guide plate is inclined, and the height of the side of the flow guide plate away from the drive shaft is lower than that of the side near the drive shaft.

[0007] The wind vane, which is higher than the drive shaft, is used to drive the drive shaft to rotate under the push of the flue gas. The guide vane is used to guide the grease condensed on the wind vane to a direction away from the drive shaft. The drive shaft is used to drive the rodent repeller to perform rodent repeller work. A metal block is provided on the drive shaft, and a magnetic block is provided on the rodent repellent. The magnetic block is used to attract the metal block so that when the drive shaft stops rotating, the metal block and the magnetic block are aligned. When the metal block and the magnetic block are aligned, the guide rods are all offset from the direction directly above the drive shaft.

[0008] Furthermore, the rodent repellent includes a rotor generator, a battery, and an ultrasonic transmitter. The input shaft of the rotor generator is fixedly connected to the drive shaft, the battery is electrically connected to the rotor generator, and the ultrasonic transmitter is electrically connected to the battery.

[0009] Furthermore, the rodent repellent also includes a sound tube, with one end of the sound tube facing the ultrasonic transmitter and the other end extending into the flue.

[0010] Furthermore, a microphone is provided on the side of the sound tube closest to the ultrasonic transmitter.

[0011] Furthermore, it also includes an oil reservoir, which is located at the bottom of the drive shaft near the guide rod.

[0012] Furthermore, the rotor generator has an eaves on the side near the drive shaft.

[0013] Furthermore, an elastic element is fixedly connected to the top of the rotor generator, and a conformal plate is fixedly connected to the side of the elastic element away from the rotor generator.

[0014] Furthermore, several rat-repelling lights are installed on the shaped board.

[0015] Furthermore, the rodent-repellent lamp has several layers of transparent film that can be detachably glued to its exterior.

[0016] Furthermore, the transparent films are all connected to the shaping plates via elastic strips, and the connection between each elastic strip and the shaping plate is evenly distributed along an arc-shaped trajectory.

[0017] The technical solution of the present invention has at least the following beneficial effects: In use, the device in this solution is deployed at the main flue outlet on the roof. The main flue outlet is typically elevated relative to the roof, so placing the device on the roof ensures that the flue gas discharged from the main flue outlet can only directly blow onto the windward vane, which is higher than the drive shaft. The drive shaft is located below the main flue outlet. Because the flue gas contains heat, and hot air is less dense than room temperature air, the flue gas will rise, thus reducing the amount of flue gas condensing directly on the drive shaft. Simultaneously, since only the higher portion is directly affected by the flue gas, the windward area is limited; therefore, the connection between the windward vane and the drive shaft is simplified to a guide rod for lightweight design.

[0018] Although only the air intake plate, which is higher than the drive shaft, directly contacts the flue gas, the oil condensed on the air intake plate will still flow downwards under gravity. Therefore, a guide plate is installed at the bottom of the air intake plate. After the oil flows down the air intake plate, it will be guided by the guide plate to the side away from the drive shaft, reducing the probability of the oil flowing to the drive shaft. This reduces the probability that the drive shaft will be clogged with oil and unable to conduct kinetic energy through rotation.

[0019] When neither smoke nor wind is generated, the drive shaft stops rotating. At this point, the guide rod may be directly above the drive shaft. When the guide rod is directly above the drive shaft, oil dripping from the guide vanes may directly onto the drive shaft. Therefore, it is necessary to avoid the guide rod being directly above the drive shaft when it stops, while also ensuring the drive shaft is always responsive to wind and smoke. This is achieved by using a metal block and a magnetic block. The magnetic block generates a magnetic force that attracts the metal block. As the driving force from smoke and wind disappears, the drive shaft gradually decelerates, while the metal block moves closer to the magnetic block. As the distance decreases, the magnetic block increases the attraction between itself and the metal block, making it more likely that the metal block will align with the magnetic block when the drive shaft stops. By planning the layout of the guide rod, when the metal block is aligned with the magnetic block, the guide rod will not be directly above the drive shaft, further reducing the probability of oil dripping from the guide vanes onto the drive shaft. Attached Figure Description

[0020] Figure 1 This is an isometric schematic diagram of an embodiment of the rodent-repelling device for rodent trails in a residential area according to the present invention; Figure 2 This is a front view schematic diagram of an embodiment of the rodent repelling device for rodent trails in a residential area according to the present invention; Figure 3 This is a side view schematic diagram of an embodiment of the rodent repelling device for rodent trails in a residential area according to the present invention; Figure 4 This is a top view schematic diagram of an embodiment of the rodent repelling device for rodent trails in a residential area according to the present invention; Figure 5 This is a schematic diagram of the windward plate of an embodiment of the rodent-repelling device for rodent trails in a residential area according to the present invention; Figure 6This is a schematic diagram of the eaves of an embodiment of the rodent-repelling device for rodent trails in a residential area according to the present invention; Figure 7 This is a schematic diagram of the sound tube of an embodiment of the rodent-repelling device for rodent trails in a residential area according to the present invention; Figure 8 This is a schematic diagram of the metal block and magnetic block of an embodiment of the rodent-repelling device for rodent trails in residential areas according to the present invention.

[0021] Attached reference numerals: 1. Main flue outlet; 2. Drive shaft; 3. Guide rod; 4. Rodent repellent; 5. Wind vane; 6. Flow guide vane; 7. Oil tank; 8. Eaves; 9. Elastic element; 10. Metal block; 11. Magnetic block; 401. Rotor generator; 402. Battery; 403. Ultrasonic transmitter; 404. Sound tube; 405. Microphone; 406. Shape-mimicking plate; 407. Rodent repellent lamp; 408. Elastic strip. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The following detailed description illustrates the specific implementation method: Example 1 As attached Figures 1-8As shown, a rodent repelling device for rodent trails in a residential area includes a drive shaft 2. One end of the drive shaft 2 is circumferentially fixedly connected to a plurality of guide rods 3, and the other end of the drive shaft 2 is connected to a rodent repellent 4. A plurality of wind-facing plates 5 are bolted to the end of the guide rods 3 away from the drive shaft 2. A guide plate 6 is glued and fixed to the side of the wind-facing plate 5 near the guide rod 3. The guide plate 6 is inclined and the height of the side of the guide plate 6 away from the drive shaft 2 is lower than that of the side near the drive shaft 2.

[0026] The windward plate 5, which is higher than the drive shaft 2, is used to drive the drive shaft 2 to rotate under the push of the flue gas. The guide plate 6 is used to guide the grease condensed on the windward plate 5 to a direction away from the drive shaft 2. The drive shaft 2 is used to drive the rodent repeller 4 to perform rodent repeller work. In this embodiment, the rodent repeller 4 can be a rodent repeller of the shape plate 406 type, which is driven by the drive shaft 2 to shake and drive away the rat.

[0027] A metal block 10 is provided on the drive shaft 2, and a magnetic block 11 is provided on the rodent repellent 4. The magnetic block 11 is used to attract the metal block 10 so that when the drive shaft 2 stops rotating, the metal block 10 and the magnetic block 11 are aligned. When the metal block 10 and the magnetic block 11 are aligned, the guide rods 3 are all offset from the direction directly above the drive shaft 2.

[0028] In use, the device in this solution is deployed at the main flue outlet 1 on the roof. Since the main flue connects to each household, and the fumes produced by the residents are exhausted into the main flue through the range hood, an airflow is generated within the main flue by the range hood's suction. This airflow is more stable than natural wind, thus serving as a driving force for rodent control within the flue. Although the fumes have been filtered by the range hood, they are still mixed with cooking oil, which can easily affect the normal operation of the rotating connections due to condensation.

[0029] The main flue outlet 1 is usually raised to a certain height relative to the roof. Therefore, the device is placed on the roof so that the flue gas discharged from the main flue outlet 1 can only blow directly onto the windward vane 5, which is higher than the drive shaft 2. The drive shaft 2 is located below the main flue outlet 1. When the flue gas is discharged, because the flue gas contains a certain amount of heat and the density of hot air is lower than that of normal temperature air, the flue gas will float upward. Therefore, the condensation of the flue gas directly on the drive shaft 2 can be reduced.

[0030] Meanwhile, since only the higher part is directly affected by the smoke and the wind-receiving area is limited, the connection between the wind-facing plate 5 and the drive shaft 2 is simplified to a guide rod 3 for lightweight design, ensuring that the drive shaft 2 can rotate when the wind-facing plate 5 hits the wind.

[0031] Although only the wind vane 5, which is higher than the drive shaft 2, directly contacts the flue gas, the oil condensed on the wind vane 5 will still flow downwards under gravity. Therefore, a guide vane 6 is installed at the bottom of the wind vane 5. After the oil flows down the wind vane 5, it will be guided by the guide vane 6 to the side away from the drive shaft 2, reducing the probability of the oil flowing to the drive shaft 2, and thus reducing the probability that the drive shaft 2 will be clogged with oil and unable to conduct kinetic energy through rotation. When the wind vane 5 rotates to the bottom of the drive shaft 2, the oil will move away from the drive shaft 2 under gravity, so there is no need to consider the oil sliding off when the wind vane 5 rotates to the bottom.

[0032] When neither smoke nor wind is generated, the drive shaft 2 stops rotating. At this time, the guide rod 3 may be directly above the drive shaft 2. When the guide rod 3 is directly above the drive shaft 2, oil dripping from the guide vane 6 may drip directly onto the drive shaft 3. Therefore, it is necessary to avoid the guide rod 4 being directly above the drive shaft 3 when it stops, while also ensuring that the drive shaft 3 is always responsive to wind and smoke. Therefore, a metal block 10 and a magnetic block 11 are provided. The magnetic block 11 generates a magnetic force that attracts the metal block 10. When the driving force generated by smoke and wind disappears, the drive shaft 2 gradually decelerates, and the metal block 10 gradually moves closer to the magnetic block 11. As the distance decreases, the magnetic block 11 increases the attraction between itself and the metal block 10, making it more likely that the metal block 10 will align with the magnetic block 11 when the drive shaft 2 stops. By planning the layout of the guide rod 3, when the metal block 10 is aligned with the magnetic block 11, the guide rod 3 will not be directly above the drive shaft 2, thereby further reducing the probability of oil dripping from the guide plate 6 onto the drive shaft 2.

[0033] Example 2 The difference from the above embodiment is that the rodent repeller 4 includes a rotor generator 401, a battery 402, and an ultrasonic transmitter 403. The input shaft of the rotor generator 401 is bolted to the drive shaft 2, the battery 402 is electrically connected to the rotor generator 401, and the ultrasonic transmitter 403 is electrically connected to the battery 402. The rodent repeller 4 also includes a sound transmission tube 404, one end of which faces the ultrasonic transmitter 403, and the other end of which extends into the flue. A microphone 405 is provided on the side of the sound transmission tube 404 near the ultrasonic transmitter 403.

[0034] Since smoke is only generated during mealtimes when residents cook, although it is more stable than natural wind, there are still significant gaps in its operation. The rodent repellent 4 can be further improved by utilizing the drive shaft 2 for energy storage. This energy storage can fill the gaps in rodent repellency during periods when no smoke is generated. In this embodiment, the drive shaft 2 is fixedly connected to the input shaft of the rotor generator 401. When the windward vane 5 drives the drive shaft 2 to rotate, the mechanical energy of the drive shaft 2 can be directly converted into electrical energy for storage, facilitating rodent repellency during windless periods.

[0035] The ultrasonic transmitter 403 repels mice by emitting ultrasonic waves. Human hearing ranges from 20 Hz to 20,000 Hz, while mice's hearing ranges from 200 Hz to 90,000 Hz. The ultrasonic mouse repeller 4 is designed to operate between 25,000 Hz and 65,000 Hz. This frequency range exceeds the normal range of human hearing and will not cause significant interference to residents' daily lives, but it falls precisely within the area where mice are most sensitive to hearing, allowing them to be clearly perceived by mice and thus repelled through sound waves.

[0036] The ultrasonic transmitter 403 can repel rodents at the main flue outlet 1, but rodents can enter the main flue through more than just outlet 1. They can also enter through the bottom cleaning port and gaps connecting to the main flue. Furthermore, the presence of electrical components within the main flue poses a fire risk due to short circuits, aging, and the potential for sparks. The main flue also contains combustible oil and its structure can utilize the chimney effect to fuel fires, causing flames to rise rapidly. Therefore, the ultrasonic transmitter 403 uses a sound transmission tube 404 to guide the sound waves into the main flue, effectively propagating the ultrasound. When rodents attempt to enter through other channels, they are startled by the ultrasound, reducing the probability of them moving between floors and into apartments. Throughout this process, the ultrasonic transmitter 403 remains outside the main flue, significantly reducing the fire risk. To ensure adequate safety, the sound transmission tube 404 can be made of flame-retardant materials, such as steel or fiberglass tubing. Users can also adjust the length of the sound transmission tube 404 according to the floor height, allowing it to penetrate a certain distance into the main flue before releasing concentrated ultrasonic waves. Alternatively, multiple release ports can be installed on the side of the sound transmission tube 404, corresponding to the location of the flue connecting to the resident's home, to further reduce the risk of rodents entering the resident's house.

[0037] The microphone 405 can increase the range of converged sound waves, and the convergence of sound waves to the sound tube 404 can effectively improve the sound wave effect.

[0038] Example 3 The difference from the above embodiment is that it also includes an oil tank 7, which is located at the bottom of the end of the drive shaft 2 near the guide rod 3. The rotor generator 401 has an eaves 8 on the side near the drive shaft 2.

[0039] As the wind-facing vane 5 rotates continuously, the oil stains attached to it will drip down and contaminate the rooftop platform. Therefore, an additional oil collection tank 7 is designed to catch the oil stains dripping from the wind-facing vane 5 and improve the hygiene of the rooftop platform.

[0040] The bearings of the rotor generator 401 are prone to oil contamination, so they need to be protected. Although a structure to improve the impact of oil contamination on the drive has been designed in Example 1, an eaves 8 is designed to further reduce the impact of flue gas on the drive shaft 2. The eaves 8 reduces the downward diffusion of flue gas from above the rotor generator 401, which can further improve the adhesion of oil contamination.

[0041] Example 4 The difference from the above embodiment is that an elastic element 9 is welded to the top of the rotor generator 401. A modeling plate 406 is fixedly connected to the side of the elastic element 9 away from the rotor generator 401. Several rodent-repelling lamps 407 are provided on the modeling plate 406. Several layers of transparent film are detachably glued to the outside of the rodent-repelling lamps 407. The transparent films are all connected to the modeling plate 406 through elastic strips 408. The connection between each elastic strip 408 and the modeling plate 406 is evenly distributed along an arc-shaped trajectory.

[0042] Since the main flue outlet 1 generates wind power, the driving force can also be used to drive the shape-mimicking board 406 to repel mice. The shape-mimicking board 406 is a board that imitates the shape of a mouse's natural enemy. Its shape can resemble a cat, snake, owl, etc. By swinging under the drive, it simulates animal behavior and thus frightens mice.

[0043] The shaped plate 406 is connected to the top of the rotor generator 401 through the elastic element 9, so that it sways under the action of wind or flue gas. The elastic deformation of the elastic element 9 is less affected by oil, so there is almost no need to consider oil discharge measures for the elastic element 9.

[0044] A rat-repelling lamp 407 is added to the mimicry board 406. The rat-repelling lamp 407 is a device that uses flashing light to scare rats. It is installed on the mimicry board 406 and can act as the eyes of the animal that the mimicry board 406 imitates, increasing the realism of the mimicry board 406 and having a better rat-repelling effect during the main activity period of rats at night.

[0045] However, the rodent-repellent lamp 407 is affected by oil stains. Oil stains adhere to the surface of the rodent-repellent lamp 407, affecting the propagation of its light and making the light dim. Therefore, an oil-proof design is required. In this embodiment, a transparent film is set on the rodent-repellent lamp 407 to isolate oil stains outside the transparent film. When too much oil stains accumulate, the transparent film can be removed to clean the oil stains.

[0046] The transparent film that has been torn off is theoretically useless and should be discarded. However, when the mimicry board 406 simulates a cat or owl, since cats or owls actually have fur or feathers, using real fur material would result in it being covered in oil stains. Therefore, several elastic strips 408 can be added to the mimicry board 406. After the transparent film is torn off, it continues to be connected to the mimicry board 406 through the elastic strips 408. The transparent film connected by the elastic strips 408 will continuously sway in the wind and act as the part of the mimicry board 406 that simulates animal fur or feathers, increasing the rodent-repelling effect of the mimicry board 406.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A rodent-repelling device for rodent trails in residential areas, characterized in that, Includes a drive shaft (2), one end of the drive shaft (2) is circumferentially fixedly connected to several guide rods (3), the other end of the drive shaft (2) is connected to a rod repellent (4), the end of the guide rod (3) away from the drive shaft (2) is provided with several wind-facing plates (5), the side of the wind-facing plate (5) close to the guide rod (3) is fixedly connected to a guide plate (6), the guide plate (6) is inclined, and the height of the side of the guide plate (6) away from the drive shaft (2) is lower than the side close to the drive shaft (2); The wind vane (5), which is higher than the drive shaft (2), is used to drive the drive shaft (2) to rotate under the push of the flue gas. The guide vane (6) is used to guide the grease condensed on the wind vane (5) to a direction away from the drive shaft (2). The drive shaft (2) is used to drive the rodent repeller (4) to perform rodent repeller work. A metal block (10) is provided on the drive shaft (2), and a magnetic block (11) is provided on the rodent repellent (4). The magnetic block (11) is used to attract the metal block (10) so that when the drive shaft (2) stops rotating, the metal block (10) and the magnetic block (11) are aligned. When the metal block (10) and the magnetic block (11) are aligned, the guide rods (3) are all deviated from the direction directly above the drive shaft (2).

2. The rodent-repelling device for rodent trails in residential areas according to claim 1, characterized in that, The rodent repellent (4) includes a rotor generator (401), a battery (402) and an ultrasonic transmitter (403). The input shaft of the rotor generator (401) is fixedly connected to the drive shaft (2). The battery (402) is electrically connected to the rotor generator (401). The ultrasonic transmitter (403) is electrically connected to the battery (402).

3. The rodent-repelling device for rodent trails in residential areas according to claim 2, characterized in that, The rodent repellent (4) also includes a sound tube (404), one end of which faces the ultrasonic transmitter (403), and the other end of which extends into the flue.

4. The rodent-repelling device for rodent trails in residential areas according to claim 3, characterized in that, The sound tube (404) has a microphone (405) on the side near the ultrasonic transmitter (403).

5. The rodent-repelling device for rodent trails in a residential area according to claim 4, characterized in that, It also includes an oil reservoir (7), which is located at the bottom of the drive shaft (2) near the guide rod (3).

6. The rodent-repelling device for rodent trails in a residential area according to claim 5, characterized in that, The rotor generator (401) has an eaves (8) on the side near the drive shaft (2).

7. The rodent-repelling device for rodent trails in a residential area according to claim 6, characterized in that, An elastic element (9) is fixedly connected to the top of the rotor generator (401), and a shaped plate (406) is fixedly connected to the side of the elastic element (9) away from the rotor generator (401).

8. The rodent-repelling device for rodent trails in a residential area according to claim 7, characterized in that, The mimicry board (406) is equipped with several rodent-repelling lamps (407).

9. The rodent-repelling device for rodent trails in a residential area according to claim 8, characterized in that, The rodent-repellent lamp (407) has several layers of transparent film that can be detachably glued to its exterior.

10. The rodent-repelling device for rodent trails in a residential area according to claim 9, characterized in that, All transparent films are connected to the shaping plate (406) via elastic strips (408), and the connection between each elastic strip (408) and the shaping plate (406) is evenly distributed along an arc-shaped trajectory.

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