Anti-pinch feeder and method of use thereof

Abstract

The application discloses a kind of anti-pinch feeders and methods, feeder includes feeder main body, feeder cover plate, anti-pinch driver, in-place sensor and controller, feeder main body is set on buried station, feeder main body lower end is communicated with buried station, feeder cover plate is placed in feeder main body upper end, feeder cover plate rear end is jointed with feeder main body, anti-pinch driver is installed in feeder main body, for driving feeder cover plate opening and closing, in-place sensor is installed in feeder main body, for sensing the opening and closing state of feeder cover plate, controller is installed in feeder main body, for receiving the signal of in-place sensor and external input, and according to signal control the operation of anti-pinch driver.The application can open a certain angle after feeder cover plate stops closing, effectively prevent user from being pinched by feeder cover plate.

Description

Technical Field

[0001] This invention belongs to the technical field of environmental protection equipment, specifically relating to an anti-pinch feeder and its usage method. Background Technology

[0002] An underground waste station is a type of facility where the entire system is concealed underground for waste treatment. This equipment integrates a sealed, environmentally friendly, and highly efficient system for collecting, transferring, and transporting household waste, solving problems such as odor, foul smells, and fly breeding associated with traditional open-air waste compactors. The surface portion of the underground waste station features a feeder, which resembles a waste bin in appearance, but differs in that its bottom is perforated and connected to the underground portion of the station.

[0003] In actual use of underground waste disposal stations, it has been found that people disposing of waste at varying speeds make it difficult to control the automatic closing time of the feeder's cover. Often, people who are slow to dispose of waste are crushed by the automatically closing cover. To ensure the safety of underground waste disposal stations, the feeder needs to be improved to prevent the feeder cover from crushing people disposing of waste. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing an anti-pinch feeder and its usage method.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0006] An anti-pinch feeder includes a feeder body, a feeder cover, an anti-pinch actuator, a position sensor, and a controller. The feeder body is installed on an underground station, with its lower end connected to the underground station. The feeder cover is placed on the upper end of the feeder body, with its rear end engaging with the feeder body. The anti-pinch actuator is installed in the feeder body to drive the feeder cover to open and close. The position sensor is installed in the feeder body to sense the opening and closing state of the feeder cover. The controller is installed in the feeder body to receive signals from the position sensor and external inputs, and to control the operation of the anti-pinch actuator based on the signals.

[0007] To optimize the above technical solution, the specific measures also include:

[0008] The aforementioned anti-pinch actuator includes a drive cylinder, a linear bearing fixing device, a linear bearing, a sliding shaft, a shaft top washer, and a feeder cover plate push rod structure. The drive cylinder includes a cylinder body and an electric push rod. The cylinder body is fixed to the feeder body. The lower end of the electric push rod is telescopically slidably engaged with the cylinder body, and the upper end of the electric push rod is fixedly connected to the lower end of the sliding shaft. The linear bearing fixing device is connected to the feeder cover plate push rod structure. The linear bearing is mounted on the linear bearing fixing device. The sliding shaft passes through the bearing hole of the linear bearing and can slide up and down relative to the linear bearing. A shaft top washer is fixed to the upper end of the sliding shaft. The diameters of the shaft top washer and the upper end of the electric push rod are both larger than the bearing hole of the linear bearing, so that the main body of the sliding shaft is confined within the linear bearing. In this device, one end of the feeder cover push rod structure is hinged to the linear bearing fixing device, and the other end is hinged to the middle of the feeder cover. The rear end of the feeder cover is hinged to the feeder body, and the middle of the feeder cover push rod structure is hinged to the feeder body. When the linear bearing fixing device drives the feeder cover push rod structure to move downward, the feeder cover push rod structure rotates forward around its hinge point with the feeder body, thereby lifting and opening the feeder cover. When the linear bearing fixing device drives the feeder cover push rod structure to move upward, the feeder cover push rod structure rotates in the opposite direction around its hinge point with the feeder body, thereby lowering and closing the feeder cover. From fully open to fully closed, the stroke length of the linear bearing fixing device is shorter than the length of the sliding shaft.

[0009] The aforementioned positioning sensors include an upper sensor and a lower sensor, which are respectively fixedly mounted on a sensor mounting bracket. The sensor mounting bracket is fixed in the feeder body. The upper sensor is located at the upper end of the linear bearing fixing device's stroke, and the lower sensor is located at the corresponding position of the linear bearing fixing device when the feeder cover is opened between 15° and 30° relative to the feeder body. When the linear bearing fixing device moves to the upper end of its stroke, the upper sensor can sense that the linear bearing fixing device has reached its upper limit position. When the linear bearing fixing device moves to the position where the feeder cover is opened between 15° and 30° relative to the feeder body, the lower sensor can sense that the linear bearing fixing device has reached the corresponding position. Both the upper and lower sensors are connected to the controller signal via wires.

[0010] The aforementioned linear bearing fixing device includes a fixing frame body and a U-shaped hinge frame. The fixing frame body has a through hole that runs vertically through the fixing frame, which is used for the sliding shaft to pass through. The linear bearing is installed on the upper surface of the fixing frame body, and the two ends of the U-shaped hinge frame are hinged to the left and right sides of the fixing frame body.

[0011] The aforementioned feeder cover push rod structure includes a fixed frame, a lever arm, and a fixed crank arm. The fixed frame is fixed at both ends to the feeder body and has a hinge column. One end of the lever arm is fixedly connected to the U-shaped hinge frame, and the other end is hinged to one end of the fixed crank arm. The middle position of the lever arm is hinged to the hinge column on the fixed frame. The other end of the fixed crank arm is hinged to the middle of the feeder cover. When the fixed frame moves up and down, the lever arm can rotate around the connection point between itself and the hinge column on the fixed frame, thereby driving the fixed crank arm to rotate. The fixed crank arm drives the feeder cover to open and close.

[0012] The aforementioned feeder body has an infrared sensor installed inside its cavity. The infrared sensor is used to sense the height of the waste inside the feeder body. An overflow indicator light is provided on the outer surface of the feeder body. Both the infrared sensor and the overflow indicator light are connected to the controller signal.

[0013] The sliding shaft is provided with a thread at its upper end. The shaft top washer includes a washer body and a nut. The washer body is fitted onto the sliding shaft, and the nut is fixed to the thread at the upper end of the sliding shaft, thus fixing the washer body onto the sliding shaft.

[0014] A radar proximity sensor is installed on the outer front surface of the feeder body. The radar proximity sensor is used to detect whether someone is approaching the feeder body. The radar proximity sensor is connected to the controller signal.

[0015] The feeder body has a display panel installed on its upper surface. The display panel is equipped with a signal input device and is connected to the controller. The controller can receive the signal input from the signal input device and send the signal to the display panel for display.

[0016] The method of using the anti-pinch feeder includes the following steps:

[0017] Step 1: After receiving the feeding command, the controller controls the drive cylinder to operate. The electric push rod moves downward and retracts, causing the sliding shaft to move downward. The shaft top washer at the upper end of the sliding shaft contacts the linear bearing fixing device. The shaft top washer pulls the linear bearing fixing device downward, which in turn drives the feeder cover plate push rod structure to move. The feeder cover plate push rod structure gradually lifts the feeder cover plate, thereby opening the feeder.

[0018] Step 2: As the electric push rod continues to move downward and retract, the linear bearing fixing device moves to the lower end of its stroke, and the drive cylinder automatically stops operating. At this time, the feeder cover is fully opened.

[0019] Step 3: After the garbage is put into the main body of the feeder, the controller controls the drive cylinder to operate in reverse. The electric push rod extends upward, driving the sliding shaft to move upward. Under its own weight, the feeder cover plate will exert an upward force on the linear bearing fixing device through the feeder cover plate push rod structure, so that the linear bearing fixing device is in contact with the shaft top washer and moves upward together with the sliding shaft. During this process, the feeder cover plate gradually closes.

[0020] Step 4: When the feeder cover is opened between 15° and 30° relative to the feeder body, the position of the linear bearing fixing device is sensed by the lower sensor. If the lower sensor senses the linear bearing fixing device again before the upper sensor senses it, the controller will pause the operation of the electric cylinder and proceed to step 5. If the lower sensor does not sense the linear bearing fixing device again before the upper sensor senses it, proceed to step 6.

[0021] Step 5: After the predetermined time, the controller controls the drive cylinder to operate in reverse again, proceeding to Step 4;

[0022] Step 6: As the linear bearing fixing device moves upward, when the feeder cover is just fully closed, there is a gap between the lower part of the linear bearing fixing device and the top of the electric push rod, and the upper sensor detects the linear bearing fixing device.

[0023] Step 7: The electric push rod continues to move upward, and the sliding shaft moves upward accordingly. The linear bearing fixing device remains in place until the top of the electric push rod contacts the lower surface of the linear bearing fixing device, and the drive cylinder stops operating.

[0024] The present invention has the following advantages:

[0025] This invention improves the drive cylinder of the feeder by setting a longer sliding shaft at the upper end of the electric push rod. When the feeder cover is lowered and closed, the linear bearing fixing device will not immediately reach the bottom of the sliding shaft, allowing the feeder cover to be lifted by external force. This prevents the user from being trapped by the feeder cover and gives the user enough time to pull their hand out of the feeder.

[0026] The present invention further includes two sensors, one above and one below. Through the cooperation of the two sensors, the closing process of the feeder cover can be changed. If the feeder cover is lifted when it is about to close, the feeder cover can stop closing. Because the sliding shaft of the present invention is long and the linear bearing fixing device has space to slide downward, the feeder cover can still be lifted at a certain angle after the feeder cover stops closing, effectively preventing the user from being pinched by the feeder cover. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the front structure of the anti-pinch feeder of the present invention;

[0028] Figure 2 This is a perspective view of the anti-pinch feeder of the present invention;

[0029] Figure 3 This is a schematic diagram of the rear structure of the anti-pinch feeder of the present invention;

[0030] Figure 4 yes Figure 3 Enlarged view of the A-section structure;

[0031] Figure 5 This is a schematic diagram of the feeder cover when it is closed;

[0032] Figure 6 It is a 3D view of the feeder cover when it is closed;

[0033] Figure 7 This is a schematic diagram of the feeder cover when it is open;

[0034] Figure 8 This is a rear view of the feeder cover when it is open.

[0035] The attached figures are labeled as follows: feeder body 1, feeder cover 11, radar proximity sensor 12, display panel 13, anti-pinch driver 2, drive cylinder 21, cylinder body 21a, electric push rod 21b, linear bearing fixing device 22, fixing frame body 22a, U-shaped hinge frame 22b, fixing frame through hole 22c, linear bearing 23, sliding shaft 24, shaft top washer 25, washer body 25a, nut 25b, feeder cover push rod structure 26, fixing frame 26a, lever arm 26b, fixed crank arm 26c, controller 3, position sensor 4, upper sensor 41, lower sensor 42, sensor mounting bracket 43. Detailed Implementation

[0036] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0037] like Figure 1-7 As shown, the present invention provides an anti-pinch feeder, the main structure of which includes a feeder body 1, an anti-pinch driver 2, a controller 3, and a positioning sensor 4. The back of the feeder body 1 is divided into upper and lower parts. The anti-pinch driver 2 and the positioning sensor 4 are installed in the upper part of the back of the feeder body 1. The controller 3 is installed in a controller mounting box, which is fixed to the lower part of the back of the feeder body 1. A transformer and a power cord are installed inside the controller mounting box. The controller 3 operates by an external power source.

[0038] The main body 21a of the electric cylinder is fixed to the main body 1 of the feeder. The lower end of the electric push rod 21b is telescopically slidably engaged with the main body 21a of the electric cylinder. The upper end of the electric push rod 21b is fixedly connected to the lower end of the sliding shaft 24. The linear bearing fixing device 22 is connected to the feeder cover plate push rod structure 26. The linear bearing 23 is installed on the linear bearing fixing device 22. The sliding shaft 24 passes through the bearing hole of the linear bearing 23 and can slide up and down relative to the linear bearing 23. A shaft top washer 25 is fixed to the upper end of the sliding shaft 24. The diameters of the shaft top washer 25 and the upper end of the electric push rod 21b are both larger than the bearing hole of the linear bearing 23, so that the main body of the sliding shaft 24 is confined in the linear bearing 23. One end of the push rod structure 26 is hinged to the linear bearing fixing device 22, and the other end is hinged to the middle of the feeder cover plate 11. The rear end of the feeder cover plate 11 is hinged to the feeder body 1. The middle of the feeder cover push rod structure 26 is hinged to the feeder body 1. When the linear bearing fixing device 22 drives the feeder cover push rod structure 26 to move downward, the feeder cover push rod structure 26 rotates forward about its hinge point with the feeder body 1, thereby lifting and opening the feeder cover plate 11. When the linear bearing fixing device 22 drives the feeder cover push rod structure 26 to move upward, the feeder cover push rod structure 26 rotates in the opposite direction about its hinge point with the feeder body 1, thereby lowering and closing the feeder cover plate 11. From fully open to fully closed, the stroke length of the linear bearing fixing device 22 is shorter than the length of the sliding shaft 24.

[0039] The upper sensor 41 and the lower sensor 42 are respectively fixedly mounted on the sensor mounting bracket 43, which is fixed in the feeder body 1.

[0040] The installation positions of the upper sensor 41 and the lower sensor 42 are as follows: when the linear bearing fixing device 22 is located at the upper end of its own stroke, the upper sensor 41 can sense the linear bearing fixing device 22; when the feeder cover plate 11 is opened by 30°, the lower sensor 42 can sense the linear bearing fixing device 22.

[0041] The linear bearing fixing device 22 includes a fixing frame body 22a and a U-shaped hinge frame 22b. The fixing frame body 22a has a through hole 22c that runs vertically through the fixing frame. The through hole 22c is used for the sliding shaft 24 to pass through. The linear bearing 23 is installed on the upper surface of the fixing frame body 22a. The two ends of the U-shaped hinge frame 22b are hinged to the left and right sides of the fixing frame body 22a.

[0042] The feeder cover push rod structure 26 includes a fixed frame 26a, a lever arm 26b, and a fixed crank arm 26c. The fixed frame 26a is fixed at both ends to the feeder body 1. A hinge post is provided on the fixed frame 26a. One end of the lever arm 26b is fixedly connected to the U-shaped hinge frame 22b, and the other end is hinged to one end of the fixed crank arm 26c. The middle position of the lever arm 26b is hinged to the hinge post on the fixed frame 26a. The other end of the fixed crank arm 26c is hinged to the middle of the feeder cover 11. When the fixed frame 26a moves up and down, the lever arm 26b can rotate around the connection point between itself and the hinge post on the fixed frame 26a, thereby driving the fixed crank arm 26c to rotate. The fixed crank arm 26c drives the feeder cover 11 to open and close.

[0043] The upper end of the sliding shaft 24 is provided with a thread. The shaft top washer 25 includes a washer body 25a and a nut 25b. The washer body 25a is fitted onto the sliding shaft 24, and the nut 25b is fixed on the thread at the upper end of the sliding shaft 24, thus fixing the washer body 25a onto the sliding shaft 24.

[0044] The present invention also has a radar proximity sensor 12 installed on the outer surface of the front side of the feeder body 1. The radar proximity sensor 12 is used to sense whether someone is approaching the feeder body 1. The radar proximity sensor 12 is connected to the controller 3.

[0045] A display panel 13 is installed on the upper surface of the feeder body 1. The display panel 13 is equipped with a signal input device. The display panel 13 is connected to the controller 3. The controller 3 can receive the signal input from the signal input device and send the signal to the display panel 13 for display.

[0046] The method of using the anti-pinch feeder includes the following steps:

[0047] Step 1: When a user intends to dispose of garbage into the underground station from the feeder, they approach the feeder. The radar proximity sensor 12 detects the approach and transmits the signal to the controller 3. The controller 3 then controls the display panel 13 to light up. The user inputs commands into the display panel 13 by swiping a card or entering a password.

[0048] Step 2: After receiving the feeding command, the controller 3 controls the drive cylinder 21 to operate. The electric push rod 21b moves downward and retracts, driving the sliding shaft 24 downward. The shaft top washer 25 at the upper end of the sliding shaft 24 abuts against the linear bearing fixing device 22. The shaft top washer 25 pulls the linear bearing fixing device 22 downward. The linear bearing fixing device 22 drives the feeder cover plate push rod structure 26 to move. The feeder cover plate push rod structure 26 gradually lifts the feeder cover plate 11, thereby opening the feeder.

[0049] Step 3: As the electric push rod 21b continues to move downwards and retracts, the linear bearing fixing device 22 moves to the lower end of its stroke, and the drive cylinder 21 automatically stops operating. At this time, the feeder cover 11 is fully opened; the user puts the garbage into the feeder.

[0050] Step 4: After the garbage is put into the main body 1 of the feeder, the controller 3 controls the drive cylinder 21 to operate in reverse, the electric push rod 21b extends upward, and drives the sliding shaft 24 to move upward. Under its own weight, the feeder cover 11 will exert an upward force on the linear bearing fixing device 22 through the feeder cover push rod structure 26, so that the linear bearing fixing device 22 is attached to the shaft top washer 25 and moves upward together with the sliding shaft 24. During this process, the feeder cover 11 gradually closes.

[0051] Step 5: When the feeder cover 11 is opened to within 30° relative to the feeder body 1, the position of the linear bearing fixing device 22 is sensed by the lower sensor 42. If the lower sensor 42 senses the linear bearing fixing device 22 again before it is sensed by the upper sensor 41, the controller 3 will stop the operation of the electric cylinder 21 and proceed to step 6. If the lower sensor 42 does not sense the linear bearing fixing device 22 again before it is sensed by the upper sensor 41, then proceed to step 7.

[0052] It needs to be explained here that when the user's hand is accidentally pressed down by the closed feeder cover 11, the opening angle of the feeder cover 11 will definitely be less than 30°. The linear bearing fixing device 22 has already been sensed once by the lower sensor 42. If the user lifts the feeder cover 11 upwards, the feeder cover 11 will drive the linear bearing fixing device 22 to slide downwards along the sliding shaft 24 through the feeder cover push rod structure 26. The linear bearing fixing device 22 will be sensed again by the lower sensor 42, thereby causing the controller 3 to stop the operation of the drive cylinder 21. The user can lift and lower the feeder cover 11 at will within a certain angle, thus ensuring that they will not be stuck by the feeder cover 11. If the user is not pressed down by the feeder cover 11, the feeder cover 11 closes relatively smoothly, and the linear bearing fixing device 22 will only be sensed once by the lower sensor 42, thus smoothly proceeding to step seven.

[0053] Step Six: After the predetermined time, the controller 3 controls the drive cylinder 21 to operate in reverse again, and proceeds to Step Five; the time is generally set to 15 to 30 seconds.

[0054] Step 7: As the linear bearing fixing device 22 moves upward, when the feeder cover plate 11 is just fully closed, there is a gap between the lower part of the linear bearing fixing device 22 and the top of the electric push rod 21b, and the upper sensor 41 senses the linear bearing fixing device 22.

[0055] Step 8: The electric push rod 21b continues to move upward, the sliding shaft 24 moves upward as well, and the linear bearing fixing device 22 remains in place until the top of the electric push rod 21b contacts the lower surface of the linear bearing fixing device 22, and the drive cylinder 21 stops operating.

[0056] Step 9: When the user leaves the feeder, the radar proximity sensor 12 detects the departure and transmits the signal to the controller 3. The controller 3 then controls the display panel 13 to cut off the power to save electricity.

[0057] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. An anti-pinch feeder, characterized in that: The device includes a feeder body (1), a feeder cover (11), an anti-pinch actuator (2), a position sensor (4), and a controller (3). The feeder body (1) is installed on the underground station, with its lower end connected to the underground station. The feeder cover (11) is placed on the upper end of the feeder body (1), with its rear end engaging with the feeder body (1). The anti-pinch actuator (2) is installed in the feeder body (1) to drive the feeder cover (11) to open and close. The position sensor (4) is installed in the feeder body (1) to sense the opening and closing state of the feeder cover (11). The controller (3) is installed in the feeder body (1) to receive signals from the position sensor (4). The anti-pinch driver (2) is controlled by the input signals from the outside and the anti-pinch driver (2) is controlled by the signals. The anti-pinch driver (2) includes a drive cylinder (21), a linear bearing fixing device (22), a linear bearing (23), a sliding shaft (24), a shaft top washer (25), and a feeder cover plate push rod structure (26). The drive cylinder (21) includes a cylinder body (21a) and an electric push rod (21b). The cylinder body (21a) is fixed on the feeder body (1). The lower end of the electric push rod (21b) is telescopically slidably engaged with the cylinder body (21a). The upper end of the electric push rod (21b) is fixedly connected to the lower end of the sliding shaft (24). The linear bearing fixing device (22) is connected to the feeder cover plate push rod structure (26). The rod structure (26) is connected, the linear bearing (23) is installed on the linear bearing fixing device (22), the sliding shaft (24) passes through the bearing hole of the linear bearing (23) and can slide up and down relative to the linear bearing (23), the upper end of the sliding shaft (24) is fixed with a shaft top washer (25), the upper diameter of the shaft top washer (25) and the electric push rod (21b) are both larger than the bearing hole of the linear bearing (23), so that the main body of the sliding shaft (24) is confined in the linear bearing (23), one end of the feeder cover plate push rod structure (26) is hinged to the linear bearing fixing device (22), the other end is hinged to the middle of the feeder cover plate (11), and the rear end of the feeder cover plate (11) is hinged to the feeder body (1). The feeder cover push rod structure (26) is hinged to the feeder body (1) in the middle. When the linear bearing fixing device (22) drives the feeder cover push rod structure (26) to move down, the feeder cover push rod structure (26) rotates in the positive direction around its hinge point with the feeder body (1), thereby lifting the feeder cover (11) open. When the linear bearing fixing device (22) drives the feeder cover push rod structure (26) to move up, the feeder cover push rod structure (26) rotates in the opposite direction around its hinge point with the feeder body (1), thereby lowering the feeder cover (11) to close. From fully open to fully closed, the stroke length of the linear bearing fixing device (22) is shorter than the length of the sliding shaft (24).The linear bearing fixing device (22) includes a fixing frame body (22a) and a U-shaped hinge frame (22b). The fixing frame body (22a) has a through hole (22c) that runs vertically through the fixing frame. The through hole (22c) is used for the sliding shaft (24) to pass through. The linear bearing (23) is installed on the upper surface of the fixing frame body (22a). The two ends of the U-shaped hinge frame (22b) are hinged to the left and right sides of the fixing frame body (22a). The feeder cover plate push rod structure (26) includes a fixing frame (26a), a lever arm (26b), and a fixed crank arm (26c). The two ends of the fixing frame (26a) are fixed to the feeder. On the main body (1), a hinge column is provided on the fixed frame (26a). One end of the lever arm (26b) is fixedly connected to the U-shaped hinge frame (22b), and the other end is hinged to one end of the fixed crank arm (26c). The middle position of the lever arm (26b) is hinged to the hinge column on the fixed frame (26a). The other end of the fixed crank arm (26c) is hinged to the middle of the feeder cover plate (11). When the fixed frame (26a) moves up and down, the lever arm (26b) can rotate around the connection point between itself and the hinge column on the fixed frame (26a), thereby driving the fixed crank arm (26c) to rotate. The fixed crank arm (26c) drives the feeder cover plate (11) to open and close.

2. The anti-pinch feeder according to claim 1, characterized in that: The positioning sensor (4) includes an upper sensor (41) and a lower sensor (42), which are respectively fixedly mounted on a sensor mounting bracket (43). The sensor mounting bracket (43) is fixed in the feeder body (1). The upper sensor (41) is located at the upper end of the stroke of the linear bearing fixing device (22). When the lower sensor (42) is located between 15° and 30° open relative to the feeder body (1) by the feeder cover plate (11), the linear bearing fixing device (22) is... 2) At the corresponding position, when the linear bearing fixing device (22) moves to the upper end of its stroke, the upper sensor (41) can sense that the linear bearing fixing device (22) has reached the upper limit position. When the linear bearing fixing device (22) moves to the point where the feeder cover plate (11) is opened between 15° and 30° relative to the feeder body (1), the lower sensor (42) can sense that the linear bearing fixing device (22) has reached the corresponding position. The upper sensor (41) and the lower sensor (42) are both connected to the controller (3) via wires.

3. The anti-pinch feeder according to claim 2, characterized in that: An infrared sensor is installed in the inner cavity of the feeder body (1). The infrared sensor is used to sense the height of the garbage in the inner cavity of the feeder body (1). An overflow indicator light is provided on the outer surface of the feeder body (1). The infrared sensor and the overflow indicator light are both connected to the controller (3).

4. The anti-pinch feeder according to claim 3, characterized in that: The upper end of the sliding shaft (24) is provided with a thread, and the shaft top washer (25) includes a washer body (25a) and a nut (25b). The washer body (25a) is sleeved on the sliding shaft (24), and the nut (25b) is fixed on the thread at the upper end of the sliding shaft (24) and fixes the washer body (25a) on the sliding shaft (24).

5. The anti-pinch feeder according to claim 4, characterized in that: A radar proximity sensor (12) is installed on the outer front surface of the feeder body (1). The radar proximity sensor (12) is used to sense whether someone is approaching the feeder body (1). The radar proximity sensor (12) is connected to the controller (3).

6. The anti-pinch feeder according to claim 5, characterized in that: The feeder body (1) is equipped with a display panel (13) on its upper surface. The display panel (13) is equipped with a signal input device. The display panel (13) is connected to the controller (3) via a signal. The controller (3) can receive the signal input from the signal input device and send the signal to the display panel (13) for display.

7. The method of using the anti-pinch feeder as described in claim 2, characterized in that: Includes the following steps: Step 1: After receiving the feeding command, the controller (3) controls the operation of the drive cylinder (21), the electric push rod (21b) moves down and retracts, driving the sliding shaft (24) to move down. The shaft top washer (25) at the upper end of the sliding shaft (24) abuts against the linear bearing fixing device (22). The shaft top washer (25) pulls the linear bearing fixing device (22) down. The linear bearing fixing device (22) drives the feeder cover plate push rod structure (26) to move. The feeder cover plate push rod structure (26) gradually lifts the feeder cover plate (11), thereby opening the feeder. Step 2: As the electric push rod (21b) continues to move downward and retract, the linear bearing fixing device (22) moves to the lower end of its stroke, and the drive cylinder (21) automatically stops operating. At this time, the feeder cover plate (11) is fully opened. Step 3: After the garbage is put into the main body (1) of the feeder, the controller (3) controls the drive cylinder (21) to operate in reverse, the electric push rod (21b) extends upward, and drives the sliding shaft (24) to move upward. Under its own weight, the feeder cover plate (11) will exert an upward force on the linear bearing fixing device (22) through the feeder cover plate push rod structure (26), so that the linear bearing fixing device (22) is attached to the shaft top gasket (25) and moves upward together with the sliding shaft (24). During this process, the feeder cover plate (11) gradually closes. Step 4: When the feeder cover (11) is opened between 15° and 30° relative to the feeder body (1), the position of the linear bearing fixing device (22) is sensed by the lower sensor (42). If the lower sensor (42) senses the linear bearing fixing device (22) again before the upper sensor (41) senses it, the controller (3) will pause the operation of the drive cylinder (21) and proceed to step 5. If the lower sensor (42) does not sense the linear bearing fixing device (22) again before the upper sensor (41) senses it, then proceed to step 6. Step 5: After the predetermined time, the controller (3) controls the drive cylinder (21) to operate in reverse again, and proceeds to step 4; Step 6: As the linear bearing fixing device (22) moves upward, when the feeder cover plate (11) is just fully closed, there is a gap between the lower part of the linear bearing fixing device (22) and the top of the electric push rod (21b), and the upper sensor (41) senses the linear bearing fixing device (22). Step 7: The electric push rod (21b) continues to move upward, the sliding shaft (24) moves upward as well, and the linear bearing fixing device (22) remains in place until the top of the electric push rod (21b) contacts the lower surface of the linear bearing fixing device (22), and the drive cylinder (21) stops operating.

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