Intelligent chair and control method thereof

Abstract

The present application belongs to the technical field of children's seats, and particularly relates to an intelligent chair and a control method thereof, which comprises intelligent identification of a human body chair back, a seat depth telescopic breathable chair seat, an electric lifting chair frame, a chair leg, and a control device and a voice player arranged below the chair seat; the chair back is internally provided with a pulse sensor and a millimeter wave radar human body sensing sensor; the chair seat is provided with an electric screw rod type seat depth telescopic component and a cold and warm air generator; the control device is integrated with an offline voice chip and a motor driving chip, and can realize voice or manual dual-mode control. The present application accurately identifies human body seating and sitting posture through a radar, monitors the heart rate of children in real time, electrically and adaptively adjusts the seat depth, integrally realizes the breathable constant temperature of the seat in all seasons through cold and warm air, matches offline voice interaction reminding, adapts to the body shapes of children of different ages, corrects bad sitting posture, is high in long sitting comfort, is safe and stable in structure, and is suitable for children learning and home resting scenes.

Description

Technical Field

[0001] This invention belongs to the field of child car seat technology, and in particular relates to an intelligent chair and its control method. Background Technology

[0002] Currently, children's chairs on the market have limited functions, only having basic height adjustment. They cannot adapt to the changes in the body shape of children of different ages, and the seat depth is not adjustable. Children who sit for long periods of time are prone to problems such as poor posture and back fatigue. At the same time, traditional chairs have poor breathability, are cold in winter and stuffy in summer, and have low comfort when sitting for long periods of time.

[0003] Existing child chairs lack human body status monitoring functions, making it impossible for parents to monitor their child's heart rate, whether they are seated, and other statuses in real time. They also lack voice interaction reminders, making it difficult to correct children's poor sitting posture in a timely manner. Conventional chairs do not have an integrated heating, cooling, and ventilation structure, and adding fans and heating pads separately results in messy wiring and significant safety hazards. Seat depth is mostly a fixed size, and manual adjustment is cumbersome and cannot automatically adapt to the child's back support needs. Human body sensing mostly uses infrared sensors, which are easily affected by clothing and light, resulting in poor recognition accuracy.

[0004] Therefore, there is an urgent need for a smart chair that can automatically monitor human body status, electrically adjust seat depth, provide built-in heating and cooling ventilation, offer voice interaction reminders, and has accurate sensor recognition, in order to solve the shortcomings of existing products such as low comfort, insufficient intelligence, and poor adaptability. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a smart chair and its control method that are reasonably designed, simple in structure, easy to manufacture, and integrate functions such as human body seating recognition, real-time heart rate monitoring, electric seat depth adaptive adjustment, seat heating and ventilation, and voice interaction reminders. This chair is suitable for children of different heights and body types, improves comfort during long periods of sitting, monitors children's posture and physical condition in real time, and is safe and convenient to use.

[0006] To achieve the above objectives, the present invention provides a smart chair, which includes a backrest that intelligently recognizes human bodies, a seat with adjustable seat depth and ventilation, an electrically adjustable frame, and chair legs; a control device and a voice player are provided under the seat.

[0007] Preferably, the intelligent human body recognition chair back includes at least a child chair back body, wherein the intelligent human body recognition chair back can be a double-back structure, and the inner surface of the chair back is provided with a pulse sensor and a short-range human body sensing sensor, and the sensors are electrically connected to the control device.

[0008] Preferably, the short-range human body sensing sensor is either a millimeter-wave radar or a microwave radar sensor, with the DFRobot C4002 radar sensor being a preferred model. Millimeter-wave radar is unaffected by light or clothing obstructions and can accurately identify a child's sitting, getting up, and leaning forward or backward movements, providing stable and reliable identification.

[0009] Preferably, the seat depth telescopic and ventilated chair includes a seat body, a seat depth telescopic component, and a ventilated component. The seat depth telescopic component is an electrically operated telescopic device, and the ventilated component is a hot and cold air generator.

[0010] Preferably, the electric telescopic device is installed in the seat support arm tube and includes a seat moving groove, a moving arm tube, a lead screw, a nut, a DC geared motor, and a guide sleeve; the output shaft of the DC geared motor is axially fastened to the lead screw; the nut is installed inside the moving arm tube and passes through the lead screw, moving along the lead screw axis.

[0011] Preferably, the movable arm tube is fitted onto the outside of the support arm tube, and a guide sleeve is positioned between the movable arm tube and the support arm tube. The seat movable groove is securely connected to the support plate on the movable arm tube. A DC geared motor drives the lead screw to rotate, causing the nut and movable arm tube to move back and forth. The guide sleeve serves to limit movement and reduce noise, enabling the seat depth to be electrically extended and retracted to accommodate different back and buttock spacings of children.

[0012] Preferably, the hot and cold air generator is located under the chair seat. The generator includes a housing containing a honeycomb PTC heating element, an axial fan, a battery pack, a control device, and a voice player. The axial fan outlet faces the honeycomb PTC heating element. The housing is securely connected to the chair seat base. The battery pack is electrically connected to the honeycomb PTC heating element, the axial fan, the control device, and the voice player. The voice player is located on one side of the housing. The honeycomb PTC heating element provides constant temperature heating, eliminating the risk of high-temperature fire. The axial fan delivers cool or hot air to the chair seat, achieving ventilation and cooling in summer and constant temperature heating in winter. The battery pack is independently powered, eliminating the need for an external power cord and improving safety.

[0013] Preferably, the control device includes an electronic board and control buttons. The electronic board is equipped with at least a motor chip, an offline voice chip, several relay output terminals, several signal input terminals, an audio output terminal, and a power input terminal. The relay output terminals are electrically connected to the motor of the electric telescopic device; the relay output terminals are electrically connected to the honeycomb PTC heating element; the audio output terminals are electrically connected to the voice player; and the signal input terminals are electrically connected to a short-range human body induction sensor. The offline voice chip can recognize voice commands without a network connection, controlling the depth extension and retraction of the seat, and the start and stop of the heating and cooling air. Human body signals collected by the radar sensor and pulse sensor are transmitted to the electronic board through the signal input terminals. After logic judgment by the chip, the relays control the start and stop of each actuator.

[0014] Preferably, the control buttons are connected to the signal input wiring harness of the electronic board and are located on the outer edge of the chair armrests or seat, making it convenient for children or parents to manually operate and adjust the functions.

[0015] Preferably, the housing is divided into a circuit board cavity, a battery pack cavity, a hot and cold air generator cavity, and a seat depth extension component cavity. The housing is provided with a connecting column for connecting to the seat, so as to realize the partitioned arrangement of each functional module, which is compact and easy to assemble.

[0016] Preferably, a control method for a smart chair is also provided, characterized in that the smart chair is the smart chair according to any one of claims 1 to 9, and the control method includes the following steps: (6) Seating monitoring: After the short-range human body sensor detects the human body sitting signal, it transmits the signal to the control device, the equipment is automatically turned on, and the pulse sensor collects heart rate data in real time and transmits it to the control device. (7) Seat depth adjustment: By controlling the button or issuing an adjustment command via offline voice, the control device drives the DC geared motor to rotate in both directions, which in turn drives the lead screw to rotate, causing the moving arm tube to move back and forth, thus adjusting the seat depth; (8) Cooling and heating ventilation control: In summer ventilation mode, only the axial flow fan is started to output normal temperature airflow. In winter heating mode, the axial flow fan and honeycomb PTC heating element are started simultaneously to output constant temperature hot air; (9) Posture reminder: When the pulse sensor detects an abnormal heart rate or the short-range human body sensor detects that the child has been lying face down and leaning forward for a long time, the control device drives the voice player to play a prompt voice. Standby mode when a child leaves their seat: When the short-range human body sensor detects that a child has left their seat for more than a preset time, the control device automatically cuts off the power to the motor and heating element, and enters a low-power standby state.

[0017] Compared with existing technologies, the advantages and positive effects of the smart chair provided by this invention are as follows: 1. Equipped with a millimeter-wave or microwave radar human body sensor, it is unaffected by light or clothing, accurately identifying when a child sits down, gets up, or has poor posture. Combined with a pulse sensor, it monitors heart rate in real time, and provides voice alerts via a voice player for abnormal conditions, protecting children's health.

[0018] 2. The electric seat telescopic component is set up, which drives the seat to move back and forth through a lead screw and DC geared motor to adapt to the body shape of children of different heights, ensure a close fit to the waist and back, and correct poor sitting posture.

[0019] 3. An integrated hot and cold air generator is located under the seat. The honeycomb PTC constant temperature heating combined with the axial flow fan achieves warmth in winter and coolness in summer. The seat is breathable and does not cause sweating, greatly improving the comfort of sitting for long periods of time. The battery is independently powered, eliminating the safety hazards of external wiring.

[0020] 4. Equipped with an offline voice chip, it can control seat depth and heating / cooling air by voice without a network. It also features physical control buttons on the armrests or side of the chair, offering both voice and manual operation modes for easy use.

[0021] 5. All sensors, motors, and heating elements are uniformly integrated and managed by the control device. The circuit is neat, the structure is integrated, the assembly is convenient, the overall structure is stable and durable, and it is suitable for various scenarios such as children's learning and home rest. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sensor arrangement inside the chair back for intelligent human body recognition according to the present invention. Figure 3 This is a schematic diagram of the seat depth telescopic component of the present invention; Figure 4 This is a perspective view of the internal structure of the seat depth telescopic component of the present invention; Figure 5 This is a schematic diagram of the internal structure of the seat depth telescopic component of the present invention from another perspective; Figure 6 This is a schematic diagram of the structure of the housing of the hot and cold air generator of the present invention; Figure 7 This is a schematic diagram of the internal structure of the hot and cold air generator of the present invention; Figure 8 This is a block diagram of the electronic board circuit connection of the control device of the present invention; In the above figures, 1. Intelligent human body recognition chair back; 11. Chair back body; 12. Pulse sensor; 13. Short-range human body sensor; 2. Seat; 21. Seat body; 22. Seat depth telescopic assembly; 221. Support arm tube; 222. Moving arm tube; 223. Lead screw; 224. Nut; 225. DC geared motor; 226. Guide sleeve; 227. Seat moving groove; 23. Hot and cold air generator; 231. Housing; 2311. Circuit board cavity; 2312. Battery pack cavity; 2313. Hot and cold air generator cavity; 2314. Seat depth telescopic assembly cavity; 2315. Connecting column; 232. Honeycomb PTC heating element; 233. Axial flow fan; 234. Battery pack; 3. Electric height-adjustable chair frame; 4. Chair legs; 5. Control device; 51. Electronic board; 52. Control buttons; 6. Voice player. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Examples, such as Figures 1-8 As shown, a smart chair, in order to realize intelligent monitoring and multi-functional adjustment of the children's chair, includes a smart human body recognition backrest 1, a seat 2, an electric height-adjustable chair frame 3, and chair legs 4; a control device 5 and a voice player 6 are provided under the seat 2.

[0027] To achieve accurate monitoring of the human body's condition, the intelligent human body recognition chair back 1 includes a chair back body 11. A pulse sensor 12 and a short-range human body sensor 13 are installed on the inner surface of the chair back body 11. Both the pulse sensor 12 and the short-range human body sensor 13 are electrically connected to the control device 5. The short-range human body sensor 13 is a millimeter-wave radar sensor or a microwave radar sensor, unaffected by light or clothing obstructions, and can accurately identify a child's sitting, getting up, and leaning forward or backward movements. The pulse sensor 12 is used to collect the child's heart rate data in real time. Both types of sensors are connected to the signal input terminal of the control device 5 via wiring harnesses.

[0028] To achieve electric adjustment of seat depth, the chair seat 2 includes a chair seat body 21, a seat depth telescopic assembly 22, and a hot / cold air generator 23. The seat depth telescopic assembly 22 is mounted on the outside of the chair seat support arm tube 221 and includes a chair seat moving groove 227, a moving arm tube 222, a lead screw 223, a nut 224, a DC geared motor 225, and a guide sleeve 226. The output shaft of the DC geared motor 225 is axially fastened to the lead screw 223. The nut 224 is installed inside the moving arm tube 222 and passes through the lead screw 223, moving axially along the lead screw 223. The moving arm tube 222 is fitted onto the outside of the support arm tube 221. The guide sleeve 226 is disposed between the moving arm tube 222 and the support arm tube 221. The chair seat moving groove 227 is fastened to the support plate on the moving arm tube 222. The DC geared motor 225 drives the lead screw 223 to rotate, which in turn drives the nut 224 and the moving arm tube 222 to move back and forth. The guide sleeve 226 plays a role in limiting and reducing noise, thereby realizing the electric telescopic adjustment of the seat depth.

[0029] To achieve the seat's heating and cooling ventilation functions, a heating and cooling air generator 23 is installed under the seat 2. The generator 23 includes a housing 231, within which a honeycomb PTC heating element 232, an axial flow fan 233, a battery pack 234, and a control device 5 are housed. The air outlet of the axial flow fan 233 faces the honeycomb PTC heating element 232. The housing 231 is securely connected to the seat base. The battery pack 234 is electrically connected to the honeycomb PTC heating element 232, the axial flow fan 233, the control device 5, and a voice player 6. The voice player 6 is located on one side of the housing 231. The honeycomb PTC heating element 232 provides constant temperature heating, eliminating the risk of high-temperature fire. The axial flow fan 233 delivers cool or hot air to the seat, achieving ventilation and cooling in summer and constant temperature heating in winter. The battery pack 234 is independently powered, eliminating the need for an external power cord and improving safety.

[0030] To achieve the partitioned layout and integrated assembly of each functional module, the housing 231 is divided into a circuit board cavity 2311, a battery pack cavity 2312, a hot and cold air generator cavity 2313, and a seat depth extension component cavity 2314. The housing 231 is provided with a connecting post 2315 for connecting to the seat. Each functional module is independently installed in its corresponding cavity, resulting in a compact structure, convenient assembly, and neat wiring.

[0031] To achieve centralized control of various functions, the control device 5 includes an electronic board 51 and control buttons 52. The electronic board 51 is equipped with a motor drive chip, an offline voice chip, a multi-channel relay output module, multiple signal input terminals, an audio output terminal, and a power input terminal. The relay output module includes a first relay output channel and a second relay output channel. The first relay output channel is electrically connected to the DC geared motor 225, and the second relay output channel is electrically connected to the honeycomb PTC heating element 232. The audio output terminal is electrically connected to the voice player 6. The signal input terminals are electrically connected to the short-range human body sensor 13, the pulse sensor 12, and the control buttons 52, respectively. The offline voice chip can recognize voice commands without a network connection, controlling seat depth extension and heating / cooling operation. Human body signals collected by the radar sensor and pulse sensor are transmitted to the electronic board 51 through the signal input terminals. After logical judgment by the chip, the relays control the start and stop of each actuator. The control buttons 52 are located on the outer edge of the chair armrests or seat and are connected to the signal input terminals of the electronic board 51 via wiring harnesses, supporting manual adjustment of seat depth and heating / cooling operation.

[0032] To enable height adjustment of the seat, an electrically adjustable chair frame 3 is connected between the seat 2 and the chair legs 4, allowing for electric adjustment of the overall seat height to accommodate children of different heights. The chair legs 4 feature a five-star base structure with casters, facilitating seat movement and securing.

[0033] The invention will be further described below with reference to the specific working process.

[0034] Seating monitoring process: When a child sits behind the seat, the short-range human body sensor 13 detects the human body signal and transmits the signal to the electronic board 51 of the control device 5, and the device automatically turns on; the pulse sensor 12 collects heart rate data in real time and transmits it to the electronic board 51. If an abnormal heart rate is detected or the child is lying forward for a long time, the offline voice chip drives the voice player 6 to play a prompt voice to remind the child to correct their sitting posture and take a proper rest.

[0035] Seat depth adjustment process: The user issues adjustment commands via the armrest control button 52 or offline voice. The motor drive chip of the electronic board 51 outputs drive signals to control the DC geared motor 225 to rotate forward and backward. The lead screw 223 drives the nut 224 and the moving arm tube 222 to move back and forth, adjusting the seat depth to fit the child's back support needs.

[0036] Operating process of cooling and heating ventilation: When a ventilation command is issued in summer, only the axial flow fan 233 is activated to output normal temperature airflow for ventilation and heat dissipation; when a heating command is issued in winter, the relay simultaneously activates the axial flow fan 233 and the honeycomb PTC heating element 232 to deliver constant temperature hot air into the seat cushion; the cooling and heating components can be turned off separately when not in use.

[0037] Standby operation when a child is away from their seat: When the short-range human body sensor 13 detects that the child has been away from their seat for more than a preset time, the control device 5 automatically cuts off the power supply to the DC geared motor 225 and the honeycomb PTC heating element 232, and enters a low-power standby state to save power.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A smart chair, comprising a backrest for intelligent human body recognition, a seat, an electrically adjustable chair frame, and chair legs, characterized in that, A control device and a voice player are installed below the chair seat. The intelligent human body recognition chair back includes a chair back body. A pulse sensor and a short-range human body sensor are installed on the inner surface of the chair back body. Both the pulse sensor and the short-range human body sensor are electrically connected to the control device. The chair seat includes a chair seat body, a seat depth telescopic assembly, and a hot and cold air generator. The seat depth telescopic assembly includes a support arm tube, a moving arm tube, a lead screw, a nut, and a DC geared motor. The output shaft of the DC geared motor is axially fastened to the lead screw. The nut is installed inside the moving arm tube and sleeved on the lead screw. The moving arm tube is connected to the chair seat body. The hot and cold air generator includes a housing. A honeycomb PTC heating element, an axial flow fan, and a battery pack are installed inside the housing. The air outlet of the axial flow fan is oriented towards the honeycomb PTC heating element.

2. The smart chair according to claim 1, characterized in that, The short-range human body sensing sensor is a millimeter-wave radar sensor or a microwave radar sensor.

3. The smart chair according to claim 1, characterized in that, The seat depth telescopic assembly also includes a guide sleeve, which is disposed between the movable arm tube and the support arm tube.

4. The smart chair according to claim 1, characterized in that, The movable arm tube is sleeved on the outside of the support arm tube, and the seat body is fastened to the support plate on the movable arm tube through the seat moving groove.

5. The smart chair according to claim 1, characterized in that, The control device includes an electronic board and control buttons. The electronic board is equipped with a motor drive chip, an offline voice chip, a relay output module, a signal input terminal, an audio output terminal, and a power input terminal.

6. The smart chair according to claim 5, characterized in that, The relay output module includes a first relay output channel and a second relay output channel. The first relay output channel is electrically connected to the DC geared motor, and the second relay output channel is electrically connected to the honeycomb PTC heating element. The audio output terminal is electrically connected to the voice player, and the signal input terminal is electrically connected to the short-range human body sensor, the pulse sensor, and the control button, respectively.

7. The smart chair according to claim 5, characterized in that, The control buttons are located on the outer edge of the chair armrests or seat.

8. The smart chair according to claim 1, characterized in that, The housing is securely connected to the base plate of the chair seat. The battery pack is electrically connected to the honeycomb PTC heating element, the axial flow fan, the control device, and the voice player. The voice player is located on one side of the housing.

9. The smart chair according to claim 8, characterized in that, The housing is divided into a circuit board cavity, a battery pack cavity, a hot and cold air generator cavity, and a seat depth telescopic component cavity. A connecting post for connecting to the seat is provided on the housing.

10. A control method for a smart chair, characterized in that, The control method using the smart chair according to any one of claims 1 to 9 includes the following steps: (1) Seating monitoring: After the short-range human body sensor detects the human body sitting signal, it transmits the signal to the control device, the equipment is automatically turned on, and the pulse sensor collects heart rate data in real time and transmits it to the control device. (2) Seat depth adjustment: By controlling the button or issuing an adjustment command via offline voice, the control device drives the DC geared motor to rotate in both directions, which in turn drives the lead screw to rotate, causing the moving arm tube to move back and forth, thus adjusting the seat depth; (3) Cooling and heating ventilation control: In summer ventilation mode, only the axial flow fan is started to output normal temperature airflow. In winter heating mode, the axial flow fan and honeycomb PTC heating element are started simultaneously to output constant temperature hot air; (4) Posture reminder: When the pulse sensor detects an abnormal heart rate or the short-range human body sensor detects that the child has been lying face down and leaning forward for a long time, the control device drives the voice player to play a prompt voice. (5) Standby when away from seat: When the short-range human body sensor detects that the child has been away from the seat for more than the preset time, the control device automatically cuts off the power supply to the motor and heating element and enters a low-power standby state.

Images