Child seat armrest automatic adjusting method and system and child seat

Abstract

The invention relates to the field of child seats, and discloses an automatic child seat armrest adjusting method and system and a child seat. The method comprises the steps that an armrest target height value and an armrest initial height value are preset; detecting a child seating and leaving signal in real time, wherein the child seating and leaving signal comprises a child standard seating signal and a child complete leaving signal; judging whether a child standard seating signal is detected or not; if yes, an electric driving mechanism is controlled to operate to drive the handrail to move to the position corresponding to the handrail target height value; judging whether a complete off-seat signal of the child is detected or not; if yes, the electric driving mechanism is controlled to operate to drive the handrail to move to the position corresponding to the initial height value of the handrail. After a child is sensed to sit, the handrail automatically ascends and descends to the height matched with the height of the child, after the child is sensed to leave the seat, the handrail automatically descends to the initial height, the whole process is automatically triggered, and the using convenience of the handrail is improved; the child can be guided to regularly use the safety belt to achieve standard seating.

Description

Technical Field

[0001] This invention relates to the field of child car seat technology, and more specifically, to a method, system, and child car seat with automatic armrest adjustment. Background Technology

[0002] The armrests of child seats (such as car seats and high chairs) serve as auxiliary support components, and their height adaptability directly affects the comfort, safety, and ease of independent use for children. Currently, armrest structures on the market are mainly divided into two categories: fixed-height and manually adjustable. The former has a simple structure but cannot adapt to children of different heights, easily leading to insufficient support or interference. The latter, while allowing some height adjustment, often uses mechanisms such as buckles, presses, or knobs, still requiring active user operation. Children find it difficult to adjust independently, and there is a risk of forgetting to adjust or adjusting incorrectly. In recent years, some high-end seats have introduced motor-driven electrically adjustable armrests, which can be raised and lowered via buttons or touch controls. However, these solutions still require manual triggering and cannot automatically recognize whether a child is seated or has left the seat. If the armrest is not adjusted promptly after a child sits down, the armrest height may not provide effective support; if the armrest remains raised after a child leaves the seat, it may affect subsequent use or obstruct adults from placing items. Summary of the Invention

[0003] To address at least one of the aforementioned problems, the present invention first provides a method for automatically adjusting the armrests of a child car seat, comprising the following steps:

[0004] The target height and initial height of the handrail are preset.

[0005] Real-time detection of children's entry and exit signals, including signals of children properly entering and exiting their seats and signals of children completely leaving their seats;

[0006] Determine whether the child's proper seating signal has been detected; if so, control the electric drive mechanism to move the armrest to the position corresponding to the target height value of the armrest.

[0007] Determine whether the signal indicating that the child has completely left the seat has been detected; if so, control the electric drive mechanism to move the armrest to the position corresponding to the initial height value of the armrest.

[0008] Optionally, the step of determining whether a child's proper seating signal has been detected includes:

[0009] Detect whether the pressure on the seat cushion reaches the first pressure threshold and remains there for the first duration;

[0010] If the pressure on the seat cushion reaches the first pressure threshold and continues for a first duration, then it is detected whether the distance between the human back and the seat back is less than or equal to the first distance threshold.

[0011] If the distance between the human back and the seat back is less than or equal to the first distance threshold, then check whether the five-point buckle is fully engaged and locked.

[0012] If the five-point buckle is fully fastened and locked, it is determined that the child's proper seating signal has been detected.

[0013] Optionally, the step of determining whether a signal indicating that a child has completely left their seat has been detected includes:

[0014] Check if the five-point latch is unlocked;

[0015] If the five-point buckle is unlocked, the pressure on the seat cushion is checked to see if it is below the first pressure threshold and this is continued for a second duration.

[0016] If the pressure on the seat cushion is lower than the first pressure threshold and continues for a second duration, then detect whether the distance between the human back and the seat back is greater than the first distance threshold and continues for a third duration.

[0017] If the distance between the human back and the seat back is greater than the first distance threshold and continues for a third duration, then it is detected whether it continues for a fourth duration.

[0018] If this continues for a fourth time, it is determined that the signal indicating the child has completely left their seat has been detected.

[0019] Optionally, the automatic adjustment method for child seat armrests also includes the following steps:

[0020] During the movement of the handrail, the operating current of the electric drive mechanism is detected in real time to see if it exceeds a preset threshold. If so, a reverse operation signal is sent to the electric drive mechanism. After receiving the reverse operation signal, the electric drive mechanism drives the handrail to move in the opposite direction by a set distance and triggers the alarm module to issue a prompt signal.

[0021] Optionally, the automatic adjustment method for child seat armrests also includes the following steps:

[0022] The rotation pulse signal of the motor in the electric drive mechanism detected by the Hall sensor is obtained, and the actual height of the handrail is calculated in real time based on the rotation pulse signal.

[0023] Upon detecting the child's proper seating signal, determine whether the actual height of the armrest matches the target height of the armrest; if so, control the motor to stop working.

[0024] If the signal indicating that the child has completely left the seat is detected, it is determined whether the actual height of the armrest is consistent with the initial height of the armrest; if so, the motor is controlled to stop working.

[0025] Optionally, the automatic adjustment method for child seat armrests also includes the following steps:

[0026] A pre-stored database of handrail heights is available;

[0027] Obtain the height information of the child riding in the handrail, and derive the corresponding target height value of the handrail based on the height handrail database.

[0028] Optionally, the automatic adjustment method for child seat armrests also includes the following steps:

[0029] Determine whether a wireless control command from an external device has been received. If so, switch to manual mode according to the wireless control command. In manual mode, obtain the handrail adjustment signal directly set by the user, and drive the handrail to move according to the handrail adjustment signal.

[0030] Optionally, the automatic adjustment method for child seat armrests also includes the following steps:

[0031] Determine whether the handrail has moved to the position corresponding to the target height value of the handrail. If so, trigger the electromagnetic lock to lock the position of the handrail.

[0032] If a signal indicating that the child has completely left the seat is detected, the electromagnetic lock is released from locking the armrest.

[0033] Compared with existing technologies, the beneficial effects of the automatic adjustment method for child seat armrests in this invention are as follows:

[0034] 1. Once a child is seated, the armrest will automatically rise to a height that matches the child's height. Once a child leaves the seat, the armrest will automatically descend to its initial height. The entire process is triggered automatically and does not require manual adjustment by the child or adult, thus improving the convenience of adjusting the armrest. The armrest's height is matched to the child's height, which can effectively support the child's arms and improve the child's comfort while sitting.

[0035] 2. After a child is seated, the system will use a triple seating assessment to guide the child to use the seat belt correctly. The armrest will only rise when all three seating assessments are met. This also prevents misjudgments caused by items placed on the seat, thus improving safety and reliability.

[0036] 3. The system uses a triple-step exit detection mechanism after a child leaves their seat, and includes a delay to ensure the child is completely off the seat. This avoids misjudgments caused by changes in posture or other movements, further improving safety and reliability.

[0037] 4. During the descent of the handrail, the operating current of the electric drive mechanism is detected. If the operating current of the electric drive mechanism exceeds the preset threshold, it proves that the handrail has pressed against an obstacle on its descent path. At this time, the handrail will be controlled to rise in the opposite direction by a set distance to effectively prevent the risk of pinching and ensure the safety of children.

[0038] 5. Through motor drive and Hall sensor feedback, millimeter-level height adjustment can be achieved. At the same time, combined with a height database, it can automatically match the most suitable support height for children of different heights, improving comfort.

[0039] 6. The handrail can receive wireless commands from external devices and switch to manual adjustment mode, realizing automatic-manual dual-mode switching. At the same time, users can directly set the handrail height on external devices, providing users with two operation methods and improving the user experience.

[0040] This invention provides an automatic adjustment system for child car seat armrests, used to perform the automatic adjustment method for child car seat armrests as described above, characterized in that it includes:

[0041] The status awareness module is used to detect whether a child is sitting properly or has completely left their seat;

[0042] The electric adjustment actuator is used to drive the vertical lifting and lowering of the handrail;

[0043] The control module is used to receive the electrical signal from the status sensing module and transmit the electrical signal to the electric adjustment execution module to drive the electric adjustment execution module to raise and lower the handrail.

[0044] Compared with the prior art, the automatic adjustment system for child seat armrests described in this invention has the same advantages as the above-mentioned automatic adjustment method for child seat armrests compared with the prior art, and will not be repeated here.

[0045] The present invention also provides a child seat equipped with the automatic adjustment system for the child seat armrests as described above.

[0046] Compared to existing technologies, the child seat described in this invention has the same advantages as the aforementioned automatic adjustment system for child seat armrests, which will not be repeated here. Attached Figure Description

[0047] Figure 1 This is a flowchart of a method for automatically adjusting the armrests of a child car seat according to an embodiment of the present invention;

[0048] Figure 2 This is a flowchart illustrating how to determine whether a child has properly taken their seat, according to an embodiment of the present invention.

[0049] Figure 3 This is a flowchart illustrating how to determine whether a signal indicating that a child has completely left their seat has been detected, according to an embodiment of the present invention. Detailed Implementation

[0050] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0051] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0053] In a first aspect, embodiments of the present invention provide a method for automatically adjusting the armrests of a child seat. The seat includes a seat cushion and a backrest. An electric drive mechanism is installed on the seat cushion, and an armrest is connected to the electric drive mechanism. The electric drive mechanism can drive the armrest to rise or fall. Preferably, the electric drive mechanism in this embodiment is a motor and a lead screw. The lead screw is connected to the motor shaft of the motor to achieve rotation, and the armrest is threadedly connected to the lead screw, with the rotation of the lead screw driving the armrest to rise or fall in a specific direction.

[0054] Reference Figures 1 to 3 As shown, the automatic adjustment method for child car seat armrests includes the following steps:

[0055] The system detects children's entry and exit signals in real time, including signals for children sitting properly and signals for children completely leaving their seats. It also has preset target height values ​​and initial height values ​​for the armrests.

[0056] The system includes a pre-stored database of armrest heights (meaning armrests are adapted to different child heights). The initial armrest height is typically set to the lowest position to facilitate children getting in and out of the seat. The target armrest height can be obtained by matching the child's height information with the pre-stored database. The child's height information can be entered directly by the user or automatically detected by an infrared sensor installed on the seat.

[0057] Reference Figure 2 The steps to determine whether a child's proper seating signal has been detected include:

[0058] The system detects whether the pressure on the seat cushion reaches a first pressure threshold (e.g., the first pressure threshold is set to ≥2.5kg) and lasts for a first duration (e.g., the first duration is set to ≥0.5s). This will initially determine whether a person is on the seat (excluding false triggering caused by the placement of light items such as backpacks or toys, and avoiding misjudging a child sitting on the seat due to the weight of a single item). If so, the system detects whether the distance between the person's back and the seat back is less than or equal to a first distance threshold (e.g., the first distance threshold is set to ≤8cm). If so, the system detects whether the five-point buckle is fully engaged and locked. If so, it is determined that a signal indicating that a child is properly seated has been detected, and the system controls the electric drive mechanism to operate so that the armrests can automatically move to the position corresponding to the target height value of the armrests.

[0059] The aforementioned triple-judgment mechanism effectively eliminates false triggering caused by placing heavy objects (such as backpacks, toys, or other lightweight items), unlocked buckles (buckles not engaged, only partially inserted, or in an unlocked state), or improper sitting posture. If any of the above triple-judgment mechanisms is not met, the electric drive mechanism will not be controlled to move the armrest.

[0060] Before the electric drive mechanism raises the armrest to the target height, as soon as a child's seated signal is detected:

[0061] Determine if a target handrail height value is pre-stored;

[0062] If so, the pre-stored target height value of the handrail will be read first. After successful reading, the electric drive mechanism will be controlled to raise the handrail to the target height value.

[0063] If not, then determine whether the child's height is pre-stored;

[0064] If so, the pre-stored height-based handrail database will be automatically retrieved (the database contains corresponding matching relationships, for example, when a child is 80cm tall, the handrail height is about 10cm, and when the child is 150cm tall, the handrail height is about 18cm). Based on the matching results, the electric drive mechanism will be controlled to raise the handrail to the target height value of the matching handrail.

[0065] If not, the handrail remains in its initial position, waiting for the operator to set the child's height or the target height of the handrail via external devices before executing the corresponding adjustment command.

[0066] During the process of the electric drive mechanism raising the handrail to the target height: the system will acquire the rotation pulse signal of the motor in the electric drive mechanism detected by the Hall sensor, and calculate the actual height of the handrail in real time based on the rotation pulse signal; determine whether the actual height of the handrail is consistent with the target height of the handrail; if so, control the motor to stop working and trigger the electromagnetic lock to lock the position of the handrail; if not, control the motor to continue working until the actual height of the handrail is consistent with the target height of the handrail.

[0067] Among them, the Hall sensor can provide real-time feedback on the motor rotation status and adjust the motor drive signal in real time, ensuring the accuracy of the actual height value of the handrail and the target height value of the handrail; after the motor stops working, the electromagnetic lock will lock the rotation of the lead screw, and since the handrail and the lead screw are connected by a thread, the handrail is locked, thus ensuring the stability of the handrail position.

[0068] Reference Figure 3 The steps to determine whether a child has completely left their seat include:

[0069] The system checks whether the five-point latch is unlocked. If so, it checks whether the pressure on the seat cushion is below a first pressure threshold for a second duration (e.g., ≥2 seconds). If so, it checks whether the distance between the user's back and the seat back is greater than a first distance threshold for a third duration (e.g., ≥2 seconds). If so, it checks whether the distance lasts for a fourth duration (e.g., 5 seconds). If so, it is determined that a signal indicating the child has completely left the seat has been detected. The electric drive mechanism is then activated to automatically move the armrest to the position corresponding to its initial height, facilitating the child's next seat entry or allowing the user to place items on the seat. If only one of the above conditions is met, or if the first three conditions are met but the duration does not reach the fourth duration, it is determined that a signal indicating the child has completely left the seat has not been detected. In this case, the electric drive mechanism will not be activated to move the armrest, effectively avoiding misjudgments caused by the child temporarily getting up or adjusting their sitting posture, thus ensuring stable use.

[0070] After detecting that a child has completely left their seat, there is a five-second delay (e.g., 3 seconds). Then, the electromagnetic lock first releases the lock on the armrest to ensure that the lead screw can rotate normally to drive the armrest down. After that, the actual height of the armrest is determined by combining the real-time feedback of the motor rotation status from the Hall sensor to determine whether the actual height of the armrest is consistent with the initial height of the armrest. If the actual height of the armrest is consistent with the initial height of the armrest, the motor is controlled to stop working. If the actual height of the armrest is inconsistent with the initial height of the armrest, the motor is controlled to continue rotating until the actual height of the armrest is consistent with the initial height of the armrest.

[0071] During the movement and lifting of the handrail, the operating current of the electric drive mechanism is monitored in real time to see if it exceeds a preset threshold (e.g., a cutoff current threshold of 1.5A). Under normal circumstances, the current will not exceed the preset threshold, and the electric drive mechanism will drive the handrail to rise and fall normally. If the handrail is obstructed during the lifting process (e.g., there is an obstacle blocking the lifting path), the motor load will increase, and the operating current of the electric drive mechanism will exceed the preset threshold. In this case, a reverse operation signal will be sent to the electric drive mechanism. After receiving the reverse operation signal, the electric drive mechanism will drive the handrail to move in the opposite direction by a set distance (e.g., 2cm) and remain stationary for a duration of six hours (e.g., 3 seconds), giving the handrail anti-pinch, anti-jamming, and reverse avoidance functions. At the same time, the alarm module will be activated to issue a warning signal, prompting parents to check and remove the obstacle. After the handrail moves in the opposite direction a set distance and remains stationary for five hours, once the obstacle is removed, the motor continues to descend or ascend. At the same time, the control module continues to monitor the motor current. If the current returns to normal, the handrail continues to descend to its initial height or ascend to its target height. If the obstacle is not removed, the motor load will increase, and the operating current of the electric drive mechanism will exceed the preset threshold. In this case, a reverse operation signal will be sent to the electric drive mechanism. Upon receiving the reverse operation signal, the electric drive mechanism will restart the handrail, moving in the opposite direction a set distance and remaining stationary for six hours. This cycle continues until the obstacle is removed.

[0072] The alarm module can be a sound alarm module that emits sound like a buzzer, or a light alarm module that emits light like an indicator light. In this embodiment, the preferred alarm module is a buzzer (frequency 2kHz, volume 60dB) that emits intermittent "beep" reminders (sounding once every 0.5 seconds and lasting for six hours).

[0073] Optionally, the automatic adjustment method for child seat armrests also includes the following steps:

[0074] Determine whether a wireless control command has been received from an external device (such as a mobile phone, tablet, or vehicle system). If so, switch to manual mode according to the wireless control command. In manual mode, obtain the handrail adjustment signal directly set by the user and drive the handrail to move according to the handrail adjustment signal.

[0075] The armrest adjustment signal is the target armrest height or the child's height. In manual mode, users can also send control signals such as raise, lower, and stop directly from the application interface on the external device or the remote control button. The control unit receives these signals and drives the motor to achieve arbitrary height adjustment of the armrest. Manual mode has higher priority than automatic mode, allowing parents to personalize settings according to actual needs. Automatic mode can be switched back via command.

[0076] In a second aspect, the present invention provides an automatic adjustment system for a child seat armrest for performing the method described in the first aspect, comprising a status sensing module, an electric adjustment execution module, and a control module. The status sensing module is used to detect whether a child is properly seated or completely seated; the electric adjustment execution module is used to drive the armrest to rise and fall vertically; the control module is used to receive electrical signals from the status sensing module and transmit the electrical signals to the electric adjustment execution module to drive the electric adjustment execution module to raise and lower the armrest.

[0077] The status sensing module includes a pressure sensor (a thin-film pressure sensor embedded in the seat cushion and electrically connected to the control module. The trigger threshold is set to 2.5 kg. When pressure ≥ 2.5 kg is detected and maintained for more than 0.5 seconds, a valid signal is output), a micro switch (installed inside the five-point latch lock box. When the latch is fully inserted and the internal locking mechanism is triggered, the contacts of the micro switch are pressed down and closed, outputting a valid signal to the control module), and an infrared distance sensor (a narrow beam model, installed at a 30-degree angle in the plastic housing under the backrest, located at the lower part of the seat backrest (15 cm from the surface of the seat cushion, aligned with the lower middle area of ​​the child's back). The detection distance threshold is 8 cm. When an object is detected at a distance ≤ 8 cm, a valid signal is output).

[0078] When the control module simultaneously receives valid signals from the pressure sensor, the microswitch, and the infrared distance sensor, the logic unit determines that the child is properly seated. For the removal from the seat determination, the microswitch must have no signal, the pressure sensor must output an invalid signal (pressure < 2.5 kg), and the infrared distance sensor must output an invalid signal (distance > 8 cm). These three states must simultaneously last for at least 2 seconds, and the total duration must accumulate to 5 seconds, to determine that the child has completely removed the seat.

[0079] The electric adjustment actuator module includes a motor (a 12V DC geared motor, 10W power, 90rpm speed), a transmission mechanism (a ball screw pair with a lead of 2mm and a reduction ratio of 20:1), and a Hall module (including a magnet and a Hall sensor; the magnet is fixed to the motor's output shaft, and the Hall sensor is fixed to the motor housing; the Hall module outputs 6 pulse signals per motor rotation). Based on the received pulse count, combined with the transmission ratio and lead, the control module can accurately calculate the handrail's lifting height (calculation formula: displacement = (number of pulses / number of pulses per revolution) × lead / reduction ratio). By comparing the calculated actual height with the target height in real time, closed-loop position control is formed. If the actual handrail height is close to the target height (difference ≤ 0.5mm), the motor speed will be reduced to 10rpm to avoid overshoot.

[0080] The core of the control module is an STM32L4 series MCU with built-in automatic triggering logic. It connects the electric adjustment execution module and the status sensing module, enabling data interaction and command issuance. The module integrates a BLE Bluetooth module, allowing wireless connectivity with external devices such as mobile phones and in-vehicle systems. This enables operators to perform three core operations via peripherals: pre-storing commonly used armrest heights, pre-storing children's heights (linked to a height-based armrest database), and directly controlling armrest height adjustment. An alarm module is also integrated. The power supply system includes a DC-DC regulator circuit to convert the vehicle's 12V power supply to a 5V system voltage, and a lithium battery as a backup power source. The circuit prioritizes connection to the seat's built-in power supply. The backup power ensures stable operation even in scenarios without an external power source (such as portable high chairs), guaranteeing reliable battery life.

[0081] Thirdly, the present invention provides a child seat, including the automatic adjustment system for the child seat armrests described in the second aspect.

[0082] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A method of automatic adjustment of a child seat armrest, characterized in that, The method comprises the steps of: presetting a handrail target height value and a handrail initial height value; real-time detecting a child entering or leaving seat signal, which comprises a child standard entering seat signal and a child completely leaving seat signal; judging whether the child standard entering seat signal is detected; if yes, controlling an electric drive mechanism to operate to drive the handrail to move to a position corresponding to the handrail target height value; judging whether the child completely leaving seat signal is detected; if yes, controlling the electric drive mechanism to operate to drive the handrail to move to a position corresponding to the handrail initial height value.

2. The method of claim 1, wherein, The step of judging whether the child standard entering seat signal is detected comprises the steps of: detecting whether the pressure on the seat cushion reaches a first pressure threshold and lasts for a first time length; if the pressure on the seat cushion reaches the first pressure threshold and lasts for the first time length, detecting whether the distance between the human back and the seat backrest is less than or equal to a first distance threshold; if the distance between the human back and the seat backrest is less than or equal to the first distance threshold, detecting whether the five-point buckle is completely buckled and locked; if the five-point buckle is completely buckled and locked, it is judged that the child standard entering seat signal is detected.

3. The method of claim 1, wherein, The step of judging whether the child completely leaving seat signal is detected comprises the steps of: detecting whether the five-point buckle is unlocked; if the five-point buckle is unlocked, detecting whether the pressure on the seat cushion is lower than the first pressure threshold and lasts for a second time length; if the pressure on the seat cushion is lower than the first pressure threshold and lasts for the second time length, detecting whether the distance between the human back and the seat backrest is greater than the first distance threshold and lasts for a third time length; if the distance between the human back and the seat backrest is greater than the first distance threshold and lasts for the third time length, detecting whether it lasts for a fourth time length; if it lasts for the fourth time length, it is judged that the child completely leaving seat signal is detected.

4. The method of claim 1, wherein, The method further comprises the steps of: during the movement of the handrail, real-time detecting whether the working current of the electric drive mechanism exceeds a preset threshold; if yes, sending a reverse running signal to the electric drive mechanism, and after receiving the reverse running signal, the electric drive mechanism drives the handrail to move reversely by a set distance, and drives an alarm module to issue a prompt signal.

5. The method of claim 1, wherein, The method further comprises the steps of: obtaining a rotation pulse signal of a motor in the electric drive mechanism detected by a Hall sensor, and calculating a handrail actual height value in real time according to the rotation pulse signal; in the case of detecting the child standard entering seat signal, judging whether the handrail actual height value is consistent with the handrail target height value; if yes, controlling the motor to stop working; in the case of detecting the child completely leaving seat signal, judging whether the handrail actual height value is consistent with the handrail initial height value; if yes, controlling the motor to stop working.

6. The method of claim 1, wherein, The method further comprises the steps of: pre-storing a height-handrail database; obtaining the height information of the child, and obtaining the corresponding handrail target height value according to the height-handrail database.

7. The method of claim 1, wherein, The method further comprises the steps of: judging whether a wireless control instruction of an external device is received; if yes, switching to a manual mode according to the wireless control instruction, and in the manual mode, obtaining a handrail adjustment signal directly set by a user, and driving the handrail to move according to the handrail adjustment signal.

8. The method of claim 1-7, wherein, The method further comprises the steps of: determining whether the handrail moves to the position corresponding to the handrail target height value, and if so, triggering the electromagnetic lock to lock the handrail position; determining whether the child complete unseating signal is detected, and if so, the electromagnetic lock releases the locking of the handrail.

9. A child seat armrest automatic adjustment system for performing the child seat armrest automatic adjustment method of any one of claims 1-8, characterized by, comprising: a state sensing module for detecting whether the child is normally seated or completely unseated; an electrically adjustable execution module for driving the vertical lifting of the handrail; a control module for receiving the electrical signal of the state sensing module and transmitting the electrical signal to the electrically adjustable execution module to drive the electrically adjustable execution module to lift the handrail.

10. A child seat, characterized in that a child seat handrail automatic adjustment system as claimed in claim 9.

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