Intelligent support frame for preventing falling after operation

Abstract

The intelligent supporting frame comprises a lifting base, a supporting plate is fixed to the upper end of the lifting base, a rubber pad is connected to the upper end of the supporting plate through screws, a pair of handles are symmetrically and rotationally connected to the left end and the right end of the supporting plate, and rotating shafts are fixed to the front end and the rear end of each handle. When a patient needs to walk and support, the handles are rotated by 180 degrees, the two handles can rotate at the same time, the rotation directions are opposite, after a rotary encoder detects the rotation angles of the handles, a controller controls an electromagnet to be powered on, at the moment, the electromagnet attracts a guide block to move leftwards, so that a tooth block is engaged and clamped with a third gear, and then the patient can walk. When a patient needs to sit, the middle of the rubber pad is pressed, the pressure sensor senses the pressure, the controller controls the electromagnet to be powered off, at the moment, after the handles are rotated to be downward, the patient can sit on the rubber pad to have a rest, and multiple functions are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of support frames, in particular to an intelligent support frame for preventing falls after surgery. Background Art

[0002] After leg surgery, a period of recovery is required. During this recovery period, in order to prevent the patient from falling while walking, the patient is usually asked to walk with a brace to support the body. However, the current postoperative fall prevention brace only serves to support the body in actual practical use. When the patient is tired of walking and needs to rest, the patient has to stand and rest with the brace, which causes inconvenience to the patient. In addition, this type of brace usually does not have intelligent features and cannot be adjusted or provide additional support according to the specific needs of the user. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an intelligent support frame for preventing falls after surgery to solve the problems existing in the above-mentioned background technology.

[0004] An intelligent support frame for preventing falls after surgery comprises a lifting base, a support plate is fixed on the upper end of the lifting base, a rubber pad is connected to the upper end of the support plate by screws, a pair of handles are symmetrically rotated and connected at the left and right ends of the support plate, a rotating shaft is fixed at the front and rear ends of the handles, a circle of inner cavity is arranged around the inside of the support plate, the end of the rotating shaft movably penetrates into the inner cavity, a first gear is fixed to the rear end of the rotating shaft at the right rear, a shaft is connected to the right rear side bearing inside the inner cavity, a connecting rod mechanism is installed between the rear end of the shaft and the rear end of the rotating shaft at the left rear, the first gear is located on the right side of the connecting rod mechanism and is meshed with the connecting rod mechanism, a rotary encoder is fixedly installed at the right front inside the inner cavity, the input shaft of the rotary encoder is fixed to the front end of the rotating shaft at the right front, a lithium battery and a controller are installed at the front inside the inner cavity, a third gear is fixed to the outside of the rotating shaft at the left front, a self-locking mechanism is meshed on the right side of the third gear, a pressure sensor is embedded in the middle of the upper end of the support plate, the rotary encoder and the pressure sensor are both connected to the controller signal, and the controller is connected to the self-locking mechanism.

[0005] Preferably, the lifting base includes a base, a bottom cylinder, a lifting column and a positioning pin, the bottom cylinder is fixed to the upper end of the base, the lifting column is slidably connected inside the bottom cylinder, the front end of the lifting column is vertically and equidistantly provided with positioning holes, the upper sides of the front and rear ends of the bottom cylinder are provided with through holes, the positioning pin is inserted between the through holes and the positioning holes in the same horizontal straight line, and the upper part of the lifting column is fixed to the lower part of the support plate.

[0006] Preferably, a groove is formed on the surface of the end of the positioning pin, a card bead is provided inside the groove, a spring is connected between the card bead and the bottom of the groove, one end of the card bead protrudes from the notch of the groove, and one end of the card bead abuts against the rear end of the bottom cylinder.

[0007] Preferably, the connecting rod mechanism includes a second gear, a connecting rod, and a turntable. The second gear is fixed at the rear end of the shaft, the second gear is meshingly connected with the first gear, the turntable is fixed at the rear end of the rotating shaft at the left rear part, the diameter of the second gear is equal to the diameter of the turntable, and the connecting rod is rotatably connected between the lower part of the rear end of the second gear and the lower part of the rear end of the turntable.

[0008] Preferably, the self-locking mechanism includes a sleeve, a return spring, a slide plate, a guide block, an electromagnet, a tooth block, and a sliding rod. The sleeve is fixed to the inner wall of the inner cavity, the slide plate is slidably connected to the inside of the sleeve, the slide bar is fixed to the left end of the slide plate, the left part of the slide bar extends out of the sleeve and is fixed to the tooth block, the tooth block is meshingly connected to the third gear, the return spring is located on the outside of the slide bar, the return spring is connected between the left part of the slide plate and the left end of the inner wall of the sleeve, a guide groove is opened at the front end of the sleeve, the guide block is slidably connected to the inside of the guide groove, the rear part of the guide block is fixed to the front part of the slide plate, the electromagnet is fixedly installed on the left side of the front end of the sleeve, the guide block is located to the right of the electromagnet, and the guide block is made of iron.

[0009] Preferably, a USB charging port is installed at the front end of the support plate, the USB charging port is connected to the lithium battery through wires, the lithium battery is electrically connected to the rotary encoder, pressure sensor, electromagnet and controller respectively, and the rotary encoder and pressure sensor are connected to the electromagnet signal through the controller.

[0010] Preferably, the ideal pulse number ± the variation value is used as the threshold of the output pulse number corresponding to the rotation of the rotary encoder by 180°; the threshold of the output pulse number corresponding to the rotation of the rotary encoder by 180° is dynamically adjusted according to the number of times the rotary encoder is used and the feedback data used.

[0011] Preferably, the threshold of the number of output pulses corresponding to the rotation of the rotary encoder by 180° is dynamically adjusted according to the number of times the rotary encoder is used and the feedback data of the use, specifically including:

[0012] Based on the specifications of the encoder, determine the ideal pulse number when rotating 180°, and use the ideal pulse number ± the variation value as the threshold of the output pulse number corresponding to the rotary encoder rotating 180°;

[0013] Record usage count: Initialize usage count to 0;

[0014] Update the usage count after each use;

[0015] Monitor and record the actual output pulse number of the rotary encoder each time it is used;

[0016] Count the average number of pulses and standard deviation within a certain period;

[0017] If the difference between the average pulse number and the ideal pulse number is greater than a threshold and the average pulse number is lower than the ideal pulse number, the ideal pulse number is reduced;

[0018] If the difference between the average pulse number and the ideal pulse number is greater than a threshold and the average pulse number is higher than the ideal pulse number, the ideal pulse number is increased.

[0019] Beneficial effects: The support frame is equipped with an adjustable height lifting base to accommodate patients of different heights. In addition, the handle of the support frame can be quickly converted from walking mode to sitting mode through simple operation, which greatly facilitates the patient's experience.

[0020] Automatic locking function: When the patient needs to use the support frame to walk, he only needs to rotate the handle 180 degrees. The system automatically detects the rotation angle through the rotary encoder and triggers the locking mechanism to ensure that the handle remains stable during walking, improving safety.

[0021] Intelligent unlocking mechanism: When the patient needs to rest, the pressure sensor detects the weight applied by the patient on the rubber pad, and the system automatically unlocks the handle, allowing the patient to easily rotate the handle to the downward position so that they can sit on the rubber pad to rest.

[0022] Dynamic threshold adjustment: Taking into account the possible errors that may occur in the long-term use of the rotary encoder, the present invention dynamically adjusts the output pulse number threshold when rotating 180 degrees to ensure that the locking mechanism can be accurately triggered even after long-term use. This feature further improves the reliability and durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of the positioning pin of the present invention;

[0025] Figure 3 It is a top view cross-sectional schematic diagram of the support plate of the present invention;

[0026] Figure 4 For the present invention Figure 3 A partial enlarged view of;

[0027] Figure 5 Schematic diagram of the connecting rod mechanism of the present invention.

[0028] In the figure: 1-base, 2-bottom cylinder, 3-lifting column, 4-positioning hole, 5-positioning pin, 51-groove, 52-spring, 53-card bead, 6-support plate, 7-rubber pad, 8-handle, 9-USB charging port, 10-inner cavity, 11-lithium battery, 12-rotating shaft, 13-rotary encoder, 14-controller, 15-pressure sensor, 16-first gear, 17-shaft, 18-second gear, 19-connecting rod, 20-turntable, 21-third gear, 22-self-locking mechanism, 221-sleeve, 222-reset spring, 223-slide plate, 224-guide groove, 225-guide block, 226-electromagnet, 227-tooth block, 228-slide rod. DETAILED DESCRIPTION

[0029] See also Figure 1-Figure 5 When the lifting column 3 is lifted up, the lifting plate 6 is lifted and lowered, and the lifting column 3 ...

[0030] A groove 51 is formed on the surface of the end of the locating pin 5, and a bead 53 is arranged inside the groove 51. A spring 52 is connected between the bead 53 and the bottom of the groove 51. One end of the bead 53 protrudes out of the notch of the groove 51, and one end of the bead 53 abuts against the rear end of the bottom cylinder 2. When the locating pin 5 is pulled out from the through hole and the positioning hole 4, the inner wall of the rear through hole will squeeze the bead 53, so that the bead 53 moves into the groove 51 to squeeze the spring 52. When the locating pin 5 is inserted into the through hole and the positioning hole 4 in the same horizontal line, the bead 53 will be squeezed by the inner wall of the through hole and the positioning hole 4 until it moves into the groove 51. In this way, after the locating pin 5 passes through the through hole at the rear, the bead 53 will be ejected by the spring 52 to be located at the rear of the bottom cylinder 2, thereby preventing the locating pin 5 from automatically moving out of the through hole.

[0031] A rubber pad 7 is connected to the upper end of the support plate 6 by screws, and a pair of handles 8 are symmetrically rotatably connected to the left and right ends of the support plate 6. A rotating shaft 12 is fixed to the front and rear ends of the handle 8. A circle of inner cavity 10 is arranged around the inside of the support plate 6, and the end of the rotating shaft 12 is movable and penetrates into the inner cavity 10. A first gear 16 is fixed to the rear end of the rotating shaft 12 at the right rear, and a shaft rod 17 is connected to the right rear side bearing inside the inner cavity 10. A connecting rod mechanism is installed between the rear end of the shaft rod 17 and the rear end of the rotating shaft 12 at the left rear. The first gear 16 is located on the right side of the connecting rod mechanism and is meshed with the connecting rod mechanism. The connecting rod mechanism includes a second gear 18, a connecting rod 19, and a turntable 20. The second gear 18 is fixed to the rear end of the shaft rod 17, and the second gear 18 is meshed with the first gear 16. The turntable 20 is fixed to the rear end of the rotating shaft 12 at the left rear, and the diameter of the second gear 18 is equal to the diameter of the turntable 20. The connecting rod 19 is rotatably connected to the lower part of the rear end of the second gear 18 and the lower part of the rear end of the turntable 20 When the patient rotates the handle 8 on the right side, the rotating shaft 12 of the handle 8 will be driven to rotate, and then the rotating shaft 12 at the right rear portion will drive the first gear 16 to rotate. As the first gear 16 is meshed with the second gear 18, the second gear 18 will drive the right end of the connecting rod 19 to be located outside the second gear 18 and perform circular motion. The right end of the connecting rod 19 is connected to the second gear 18 through an axis rotation, and the left end of the connecting rod 19 drives the turntable 20 to rotate synchronously. The left end of the connecting rod 19 is connected to the turntable 20 through an axis rotation, so that the second gear 18 and the turntable 20 will rotate synchronously in the same direction, but the rotation direction of the turntable 20 is opposite to that of the first gear 16. Therefore, the turntable 20 drives the rotating shaft 12 at the left rear portion to rotate. At this time, the left handle 8 and the right handle 8 rotate at the same time, but the rotation directions of the two handles 8 are opposite. In this way, when the handle 8 needs to be rotated, only one of them needs to be rotated to make the other handle 8 rotate synchronously.

[0032] A rotary encoder 13 is fixedly installed at the right front of the inner cavity 10, and the input shaft of the rotary encoder 13 is fixed to the front end of the right front rotating shaft 12. A lithium battery 11 and a controller 14 are installed at the front of the inner cavity 10. A third gear 21 is fixed to the outside of the left front rotating shaft 12. A self-locking mechanism 22 is meshed on the right side of the third gear 21. A pressure sensor 15 is embedded in the middle of the upper end of the support plate 6. The rotary encoder 13 and the pressure sensor 15 are both connected to the controller 14 signal. The controller 14 is connected to the self-locking mechanism 22. The self-locking mechanism 22 includes a sleeve 221, a reset spring 222, a slide plate 223, a guide block 225, an electromagnet 226, a tooth block 227, and a slide rod 228. The sleeve 221 is fixed to the inner wall of the inner cavity 10, and the slide plate 223 is slidably connected Inside the sleeve 221, the slide bar 228 is fixed to the left end of the slide plate 223, the left part of the slide bar 228 extends out of the sleeve 221 and is fixed to the tooth block 227, the tooth block 227 is meshed with the third gear 21, the return spring 222 is located on the outside of the slide bar 228, the return spring 222 is connected between the left part of the slide plate 223 and the left end of the inner wall of the sleeve 221, the front end of the sleeve 221 is provided with a guide groove 224, the guide block 225 is slidably connected inside the guide groove 224, the rear part of the guide block 225 is fixed to the front of the slide plate 223, the electromagnet 226 is fixedly installed on the left side of the front end of the sleeve 221, the guide block 225 is located on the right side of the electromagnet 226, the guide block 225 is made of iron, the front end of the support plate 6 is installed with a USB charging port 9, the USB charging port 9 is connected to the lithium battery 11 through a wire, The lithium battery 11 is electrically connected to the rotary encoder 13, the pressure sensor 15, the electromagnet 226 and the controller 14 respectively. The rotary encoder 13 and the pressure sensor 15 are connected to the electromagnet 226 signal through the controller 14. When it is needed for patient walking support, the handle 8 on the right is rotated counterclockwise by 180 degrees. At this time, through the cooperation of the first gear 16 and the connecting rod mechanism, the two handles 8 will rotate at the same time, but the rotation directions are opposite, so that the two handles 8 will be set upward after rotating by 180 degrees. In this process, the right front shaft 12 will drive the input shaft of the rotary encoder 13 to rotate. When the rotation angle of the rotary encoder 13 is 180 degrees counterclockwise, the rotary encoder 13 transmits a signal to the controller 14, and the controller 14 controls The control electromagnet 226 is energized, and the electromagnet 226 attracts the guide block 225 and moves it left along the guide groove 224. The guide block 225 drives the slide plate 223 to move left and squeezes the return spring 222. The slide plate 223 drives the slide bar 228 to move left, and the slide bar 228 drives the tooth block 227 to move left and mesh with the third gear 21, so that the left front shaft 12 cannot rotate. In this way, the two handles 8 can be locked, making it convenient to hold the handles 8 and lift the support frame for walking. When the patient needs to sit, the middle of the rubber pad 7 is pressed, and the pressure sensor 15 senses that the pressure increase exceeds the threshold value preset in the controller 14. The controller 14 controls the electromagnet 226 to cut off the power. At this time, the return spring 222 pushes the slide plate 223 to reset, and the tooth block 227 moves right and no longer meshes with the third gear 21.After that, the right handle 8 is rotated clockwise by 180 degrees and is directed downward, so that the two handles 8 are arranged vertically downward, and the patient can sit on the rubber mat 7 to rest, thereby achieving multifunctional use.

[0033] Rotary encoders may have certain errors in long-term applications. These errors mainly come from: over time, the mechanical parts of the encoder (such as shafts, bearings, gears, etc.) may wear, which may cause uneven rotation and affect the accuracy of the pulse output.

[0034] Temperature changes can affect the performance of the electronic components inside the encoder, which may cause the output pulse number to be unstable. Therefore, the threshold of the output pulse number corresponding to the rotation angle of the rotary encoder in the application cannot be fixed. In order to ensure that the locking mechanism can be accurately triggered after the handle is rotated in place, the threshold of the output pulse number corresponding to the rotary encoder rotating 180° is dynamically adjusted according to the number of times the rotary encoder is used and the feedback data. The initial threshold is set: based on the specifications of the encoder, the ideal pulse number when rotating 180° is determined, and the ideal pulse number ± the change value (such as 26) is used as the threshold of the output pulse number corresponding to the rotary encoder rotating 180°.

[0035] Record usage count: The initial usage count is 0.

[0036] The usage count is updated after each use.

[0037] Monitor and record the actual output pulse number of the rotary encoder each time it is used.

[0038] Analyze historical data: Count the average number of pulses and standard deviation within a certain period.

[0039] Adjust the threshold value based on statistical results: If the difference between the average pulse number and the ideal pulse number is greater than the threshold value, it indicates that there may be errors caused by wear or other factors, and the threshold value needs to be adjusted.

[0040] The following example circuit illustrates the dynamic threshold adjustment method of the rotary encoder:

[0041] Set the initial threshold:

[0042] Based on the specifications of the rotary encoder, determine the ideal number of pulses for a 180° rotation. Assuming the encoder has a pulse count of 1024 PPR per revolution, the ideal number of pulses for a 180° rotation is 512 pulses (because 180° is half a revolution).

[0043] Record usage times:

[0044] The initial usage count is 0.

[0045] Update the usage count after each use, for example, by recording each time the handle is rotated 180° through the controller. Monitor and record the actual output pulse number of the rotary encoder during each use:

[0046] The actual number of output pulses is recorded in the controller each time the handle is rotated 180°.

[0047] For example, use an interrupt service routine to capture encoder pulses.

[0048] Analyzing historical data:

[0049] Count the average number of pulses and standard deviation within a certain period. For example, after completing 100 rotation operations, calculate the average number of pulses and standard deviation of the most recent 100 rotations.

[0050] Statistical methods (such as mean, standard deviation) were used to evaluate the trend of pulse number changes.

[0051] Adjust the threshold based on the statistical results:

[0052] If the average pulse number deviates from the ideal pulse number by more than a threshold value (eg, 26 pulses), it indicates that there may be errors caused by wear or other factors.

[0053] Adjust the threshold range according to the size of the deviation, for example:

[0054] If the difference between the average pulse number and the ideal pulse number is greater than a threshold value (eg, 26 pulses), or if the average pulse number is lower than the ideal pulse number, the ideal pulse number is reduced.

[0055] If the difference between the average pulse number and the ideal pulse number is greater than a threshold value (eg, 26 pulses), if the average pulse number is higher than the ideal pulse number, the ideal pulse number is increased.

[0056] Special additional explanations for the circuit and function of the controller 14:

[0057] The controller 14 uses a microcontroller unit (MCU), which is a microcomputer system that integrates a processor, a memory, and an input / output interface. It can easily integrate the processing, logical operations, and output control of various sensor signals.

[0058] Available models: STM32F103C8T6 or ATmega328P

[0059] Functional description:

[0060] Receives a pulse signal from the rotary encoder 13.

[0061] The voltage or current signal from the pressure sensor 15 is received.

[0062] Perform logical operations, such as comparing the actual number of pulses to a threshold value.

[0063] Control the on and off of the electromagnet 226.

[0064] The signals of the rotary encoder 13 and the pressure sensor 15 need to be properly conditioned to be correctly read by the MCU. Use an edge detection circuit (such as a Schmitt trigger) to stabilize the pulse signal, and use an interrupt service routine to accurately capture the pulse.

[0065] Pressure sensor signal processing: The analog signal is converted into a digital signal using an amplifier and an ADC (analog-to-digital converter).

[0066] The electromagnet 226 needs sufficient current to be powered, and a driving circuit is needed to amplify the output signal of the MCU.

[0067] L298N or BTS7960 is used to receive the signal sent by the MCU, amplify the signal, and power the electromagnet 226. In order to ensure stable operation of the system, a stable power management circuit is required to power the MCU and other electronic components.

[0068] The chip used is LM2596 or TP4056, which regulates the battery voltage, powers the MCU and sensors, and charges the lithium battery 11.

[0069] Communication interface is needed to communicate with other devices or perform firmware upgrades, and a communication interface can be added. Use UART or USB, UART: for simple serial communication.

[0070] USB: For firmware upgrade or communication with PC.

[0071] To store program code, parameter settings or historical data, external memory can be added.

[0072] Chip used: AT24C02 or EEPROM, to store program code, threshold settings, usage times and other parameters.

[0073] Specific circuit module or chip combination examples:

[0074] Microcontroller:

[0075] Model: STM32F103C8T6

[0076] Function:

[0077] The pulse signal of the rotary encoder 13 is received.

[0078] The analog signal of the pressure sensor 15 is received.

[0079] Control the on and off of the electromagnet 226.

[0080] Storing and processing data.

[0081] Communicate with external devices.

[0082] Input signal processing:

[0083] Rotary encoder signal processing:

[0084] Use Schmitt trigger to stabilize the pulse signal.

[0085] Use the GPIO interrupt service routine to capture the pulse.

[0086] Pressure sensor signal processing:

[0087] Use an op amp (such as the LM358) to amplify the analog signal.

[0088] Use ADC (such as the built-in ADC of STM32F103C8T6) to convert analog signals into digital signals. Output driver:

[0089] Model: L298N

[0090] Function:

[0091] Receive PWM signal from MCU.

[0092] The signal is amplified and powered for the electromagnet 226 .

[0093] Power Management:

[0094] Model:LM2596

[0095] Function:

[0096] Regulate the battery voltage to power the MCU and sensors.

[0097] Protection Circuit:

[0098] Model: TVS diode

[0099] Function:

[0100] Protect circuits from transient voltages.

[0101] Communication interface:

[0102] Model: USART (built-in STM32F103C8T6)

[0103] Function:

[0104] Used to communicate with external devices.

[0105] Memory:

[0106] Model: AT24C02

[0107] Function:

[0108] Storage threshold settings, usage times and other parameters.

[0109] Microcontroller (STM32F103C8T6):

[0110] The GPIO pin is used to receive the pulse signal of the rotary encoder 13.

[0111] The ADC pin is used to receive the analog signal of the pressure sensor 15 .

[0112] Use GPIO pins to control the enable signal of L298N.

[0113] Use USART for firmware upgrade or data transfer.

[0114] Through the above circuit modules or chip combinations, the functions of the controller 14 can be realized and the stable operation of the postoperative fall prevention intelligent support frame can be ensured.

[0115] The present invention proposes a postoperative fall prevention intelligent support frame, which aims to provide a more comfortable and safe walking aid for patients after leg surgery. The support frame can not only provide necessary support, but also has intelligent characteristics, which can provide convenience when patients need to sit down and rest.

[0116] Versatile design: The support frame is equipped with an adjustable height lifting base to accommodate patients of different heights. In addition, the handle of the support frame can be quickly converted from walking mode to sitting mode through simple operation, which greatly facilitates the patient's experience.

[0117] Automatic locking function: When the patient needs to use the support frame to walk, he only needs to rotate the handle 180 degrees. The system automatically detects the rotation angle through the rotary encoder and triggers the locking mechanism to ensure that the handle remains stable during walking, improving safety.

[0118] Intelligent unlocking mechanism: When the patient needs to rest, the pressure sensor detects the weight applied by the patient on the rubber pad, and the system automatically unlocks the handle, allowing the patient to easily rotate the handle to the downward position so that they can sit on the rubber pad to rest.

[0119] Dynamic threshold adjustment: Taking into account the possible errors that may occur in the long-term use of the rotary encoder, the present invention dynamically adjusts the output pulse number threshold when rotating 180 degrees to ensure that the locking mechanism can be accurately triggered even after long-term use. This feature further improves the reliability and durability of the product.

[0120] Dynamic threshold adjustment: By recording the actual output pulse number of the rotary encoder and dynamically adjusting the threshold according to the average pulse number and standard deviation within a certain period, the locking mechanism can be accurately triggered even when the encoder has errors due to factors such as wear.

[0121] Easy to maintain: The design of the support frame fully considers the convenience of daily use and the simplicity of maintenance. Through the simple adjustment mechanism and automatic locking / unlocking function, it reduces the difficulty of use and also reduces the maintenance cost.

[0122] In summary, the intelligent support frame for preventing falls after surgery provided by the present invention not only effectively solves the problem of single function of traditional support frames, but also greatly improves the patient's usage experience through intelligent design. It is a medical auxiliary device that is both practical and innovative.

Claims

1. An intelligent support frame for preventing falls after surgery, including a lifting base, characterized in that: A support plate (6) is fixed to the upper end of the lifting base, and a rubber pad (7) is connected to the upper end of the support plate (6) by screws. A pair of handles (8) are symmetrically rotatably connected to the left and right ends of the support plate (6). A rotating shaft (12) is fixed to the front and rear ends of the handle (8). A circle of inner cavity (10) is arranged around the inside of the support plate (6). The end of the rotating shaft (12) is movable and penetrates into the inner cavity (10). A first gear (16) is fixed to the rear end of the rotating shaft (12) at the right rear. A shaft (17) is connected to the right rear bearing inside the inner cavity (10). A connecting rod mechanism is installed between the rear end of the shaft (17) and the rear end of the rotating shaft (12) at the left rear. The first gear (16) is located at the connecting rod mechanism. The inner cavity (10) is on the right side and meshed with the connecting rod mechanism. A rotary encoder (13) is fixedly installed at the right front inside the inner cavity (10). The input shaft of the rotary encoder (13) is fixed to the front end of the rotating shaft (12) at the right front. A lithium battery (11) and a controller (14) are installed at the front inside the inner cavity (10). A third gear (21) is fixed to the outside of the rotating shaft (12) at the left front. A self-locking mechanism (22) is meshed on the right side of the third gear (21). A pressure sensor (15) is embedded in the middle of the upper end of the support plate (6). The rotary encoder (13) and the pressure sensor (15) are both connected to the controller (14) by signal. The controller (14) is connected to the self-locking mechanism (22).

2. The intelligent support frame for preventing falls after surgery according to claim 1, characterized in that: The lifting base comprises a base (1), a bottom cylinder (2), a lifting column (3) and a positioning pin (5); the bottom cylinder (2) is fixed to the upper end of the base (1); the lifting column (3) is slidably connected inside the bottom cylinder (2); the front end of the lifting column (3) is vertically and equidistantly provided with positioning holes (4); the upper sides of the front and rear ends of the bottom cylinder (2) are provided with through holes; the positioning pin (5) is inserted between the through holes and the positioning holes (4) on the same horizontal straight line; the upper part of the lifting column (3) is fixed to the lower part of the support plate (6).

3. The intelligent support frame for preventing falls after surgery according to claim 2, characterized in that: A groove (51) is formed on the surface of the end of the positioning pin (5), a clamping bead (53) is arranged inside the groove (51), a spring (52) is connected between the clamping bead (53) and the bottom of the groove (51), one end of the clamping bead (53) protrudes out of the notch of the groove (51), and one end of the clamping bead (53) abuts against the rear end of the bottom cylinder (2).

4. The intelligent support frame for preventing falls after surgery according to claim 1, characterized in that: The connecting rod mechanism comprises a second gear (18), a connecting rod (19), and a rotating disk (20); the second gear (18) is fixed to the rear end of the shaft (17); the second gear (18) is meshingly connected with the first gear (16); the rotating disk (20) is fixed to the rear end of the rotating shaft (12) at the left rear portion; the diameter of the second gear (18) is equal to the diameter of the rotating disk (20); and the connecting rod (19) is rotatably connected between the lower part of the rear end of the second gear (18) and the lower part of the rear end of the rotating disk (20).

5. The intelligent support frame for preventing falls after surgery according to claim 1, characterized in that: The self-locking mechanism (22) comprises a sleeve (221), a return spring (222), a slide plate (223), a guide block (225), an electromagnet (226), a tooth block (227), and a slide bar (228); the sleeve (221) is fixed to the inner wall of the inner cavity (10); the slide plate (223) is slidably connected inside the sleeve (221); the slide bar (228) is fixed to the left end of the slide plate (223); the left part of the slide bar (228) extends out of the sleeve (221) and is fixed to the tooth block (227); the tooth block (227) is meshedly connected to the third gear (21) The return spring (222) is located outside the slide bar (228), the return spring (222) is connected between the left part of the slide plate (223) and the left end of the inner wall of the sleeve (221), the front end of the sleeve (221) is provided with a guide groove (224), the guide block (225) is slidably connected inside the guide groove (224), the rear part of the guide block (225) is fixed to the front part of the slide plate (223), the electromagnet (226) is fixedly installed on the left side of the front end of the sleeve (221), the guide block (225) is located on the right side of the electromagnet (226), and the guide block (225) is made of iron.

6. The intelligent support frame for preventing falls after surgery according to claim 5, characterized in that: A USB charging port (9) is installed at the front end of the support plate (6); the USB charging port (9) is connected to a lithium battery (11) via an electric wire; the lithium battery (11) is electrically connected to a rotary encoder (13), a pressure sensor (15), an electromagnet (226) and a controller (14) respectively; and the rotary encoder (13) and the pressure sensor (15) are connected to the electromagnet (226) via a signal through the controller (14).

7. The intelligent support frame for preventing falls after surgery according to claim 6, characterized in that: The ideal pulse number ± the variation value is used as the threshold of the output pulse number corresponding to when the rotary encoder rotates 180°; the threshold of the output pulse number corresponding to when the rotary encoder rotates 180° is dynamically adjusted according to the number of times the rotary encoder is used and the feedback data of the use.

8. The intelligent support frame for preventing falls after surgery according to claim 7, characterized in that: The threshold of the number of output pulses corresponding to the rotary encoder rotating 180° is dynamically adjusted according to the number of times the rotary encoder is used and the feedback data, including: Based on the specifications of the encoder, determine the ideal pulse number when rotating 180°, and use the ideal pulse number ± the variation value as the threshold of the output pulse number corresponding to the rotary encoder rotating 180°; Record usage count: Initialize usage count to 0; Update the usage count after each use; Monitor and record the actual output pulse number of the rotary encoder each time it is used; Count the average number of pulses and standard deviation within a certain period; If the difference between the average pulse number and the ideal pulse number is greater than a threshold and the average pulse number is lower than the ideal pulse number, the ideal pulse number is reduced; If the difference between the average pulse number and the ideal pulse number is greater than a threshold and the average pulse number is higher than the ideal pulse number, the ideal pulse number is increased.

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