Intelligent child safety seat capable of achieving self-adaption of shoulder strap tightening according to vehicle running road conditions and control method

Abstract

The invention relates to the technical field of child safety seats, in particular to an intelligent child safety seat capable of being self-adaptive to shoulder strap tightening according to vehicle driving road conditions and a control method. The child safety seat mainly comprises a child safety seat body, a vehicle running road condition detection device, a calculation device, a shoulder strap tightening execution device, an audible and visual alarm device and an interface, wherein the vehicle running road condition detection device, the calculation device, the shoulder strap tightening execution device and the audible and visual alarm device are installed in the child safety seat body, and the interface is installed outside the child safety seat body and can supply energy to all devices in the child safety seat body. When the device is used, the calculation device analyzes and obtains the vehicle running state according to the three-direction vehicle running acceleration data output by the vehicle running road condition detection device and a designed software algorithm, the motor control parameters of the shoulder strap tightening execution device are output in the unstable running state of the vehicle, and the drive circuit controls the motor to rotate according to the control parameters. The safety belt reel is driven by the gear set to tighten the child safety belt shoulder belt, and a child is restrained in the child safety seat more effectively.

Description

Technical Field

[0001] The present invention relates to the technical field of child safety seats, and in particular to an intelligent child safety seat capable of adaptively tightening shoulder belts according to vehicle driving conditions and a control method thereof. Background Art

[0002] The use of child safety seats has become increasingly common in recent years. As consumer demand increases and diversifies, child safety seats are constantly evolving and innovating, offering enhanced protection, improved safety features, improved safety features, and enhanced intelligence.

[0003] A review of existing patents revealed that patent application CN201410242567 describes a child safety seat with an automatic shoulder belt tensioning function and its control method. The device is powered by the vehicle through the seat's mounting interface. The internal automatic shoulder belt tensioning mechanism activates after the child safety belt's tongue is inserted into the buckle, rotating the child safety belt reel to tighten the shoulder belt. This prevents the protective effect of the child safety seat from being compromised due to loose shoulder belts and misuse during use. However, the device's shortcomings include: The automatic shoulder belt tensioning function is limited, addressing only initial shoulder belt looseness and misuse; and it lacks full-time automatic shoulder belt tensioning.

[0004] A review of existing patents revealed that patent application number CN202011639527 describes an in-vehicle system and method for displaying child safety seat status icons. This device is an intelligent child safety seat capable of collecting multiple seat status and environmental data. While the vehicle is in motion, it collects and transmits seat status and environmental data to the onboard instrument control system for real-time display and abnormality notifications. However, this device has the following limitations: it only collects, communicates, displays, and provides abnormality notifications for seat status and environmental data, but lacks the ability to autonomously control or execute abnormal conditions. Consequently, the child safety seat's intelligence level is limited. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of existing child safety seats and existing improved technologies, and to design an intelligent child safety seat and control method that can adaptively tighten the shoulder belt according to the vehicle's driving conditions.

[0006] The technical solution adopted in the present invention is:

[0007] The seat mainly includes: a child safety seat body, a vehicle driving road condition detection device, a computing device, a shoulder belt tightening execution device and an audible and visual warning device, and an interface that can supply energy to each device; the vehicle driving road condition detection device, computing device, shoulder belt tightening execution device and audible and visual warning device are installed inside the child safety seat body; the energy supply interface is installed outside the child safety seat body, and an energy supply cable is connected to each internal device; the child safety seat body is provided with a fixed interface, a drawstring and other devices that can be used to install the seat on a vehicle seat; the child safety seat body is provided with a child safety belt, a safety belt reel and other devices that can restrain the child in the seat.

[0008] The vehicle driving road condition detection device is composed of a device based on the inertia principle, which can detect the vehicle driving acceleration along the three coordinate axes in the vehicle coordinate system, thereby obtaining vehicle driving road condition information including vehicle acceleration, deceleration, road bumpiness, etc.

[0009] The computing device can analyze the vehicle's driving state in accordance with the designed software algorithm based on the three-directional vehicle acceleration output by the vehicle driving road condition detection device to determine whether the vehicle is in a stable driving state; if the vehicle is in an unstable driving state, the computing device will generate and output control parameters for controlling the operation of the shoulder belt tightening actuator;

[0010] The shoulder belt tightening actuator is composed of a drive circuit, a motor, a gear set, and a child safety seat belt reel. It can execute a shoulder belt tightening or loosening action of a set duration and rate according to the control parameters output by the computing device, thereby more effectively restraining the child in the child safety seat.

[0011] When the sound and light warning device detects that the child safety seat's seat belt tongue is inserted into or removed from the seat belt buckle, it will emit a sound and light prompt signal to inform the child safety seat user that the adaptive shoulder belt tightening energy supply will start or stop;

[0012] The child safety seat body is equipped with a child safety belt shoulder strap with a locking tongue and a child safety belt crotch strap with a buckle; the other end of the child safety belt shoulder strap is fixed to a safety belt reel, and the safety belt reel is connected to the motor of the shoulder belt tightening actuator through a gear set, and the other end of the child safety belt crotch strap is fixed to the child safety seat body;

[0013] The buckle of the crotch strap of the child safety belt is connected to two wires, which are respectively connected to the positive pole (or negative pole) of the circuit of the energy supply interface and the positive pole (or negative pole) of the circuit of each device inside the child safety seat body; when the lock tongue of the shoulder strap of the child safety belt is inserted into or pulled out of the buckle, the wires are used to connect or disconnect the energy supply circuit between each device and the positive pole (or negative pole) of the energy supply interface circuit, thereby starting or stopping the adaptive shoulder belt tightening function of the child safety seat.

[0014] The present invention also provides a control method for the child safety seat, specifically: when the locking tongue of the child safety belt shoulder strap is inserted into the buckle of the child safety belt crotch strap, the various devices inside the child safety seat body are powered on, the vehicle driving road condition detection device starts to detect the vehicle driving acceleration along the three coordinate axis directions in the whole vehicle coordinate system, the computing device calculates and analyzes the acceleration data in the three directions according to the algorithm, and automatically starts the adaptive shoulder belt tightening function after finding that the vehicle acceleration has changed and lasts for a period of time, the computing device continues to calculate and analyze the acceleration data in each direction according to the algorithm, determines whether the vehicle driving state is stable, and outputs the motor control parameters of the shoulder belt tightening execution device in the unstable vehicle driving state, and after receiving the control parameters, the driving circuit controls the motor to rotate the shoulder belt tightening execution device, and drives the seat belt reel to tighten the child safety belt shoulder strap through the gear set.

[0015] The beneficial effects of the present invention are:

[0016] This device is similar in appearance to existing child safety seats and can be adapted to existing vehicle seats. By installing a road condition detection device, a calculation device, and a shoulder belt tightening actuator within the child safety seat, along with an external power supply interface, the invented child safety seat becomes an intelligent child safety seat capable of sensing road conditions and adaptively tightening the shoulder belts. This allows children to be more effectively restrained in the child safety seat during unstable vehicle conditions, minimizing potential injuries to children and enhancing the protective effectiveness of the child safety seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the child safety seat of this example and its relative installation relationship with the vehicle seat.

[0018] Figure 2 It is a schematic diagram of the child safety belt shoulder strap tensioning device of this example.

[0019] Figure 3 This is a front view diagram of the child safety belt buckle position in this example.

[0020] Figure 4 This is a schematic flow chart of the child safety seat control method of this example.

[0021] Numbers in the figure:

[0022] 1-Car seat; 2-Child safety seat body; 3-Child safety belt shoulder strap; 4-Shoulder belt tightening actuator motor; 5-Motor output shaft; 6-Output gear set; 7-Seat belt reel; 8-Child safety belt end; 9-Vehicle driving road condition detection device; 10-Sound and light warning device; 11-Child safety belt shoulder strap lock tongue; 12-Child safety belt crotch strap buckle; 13-Computing device; 14-Cable; 15-Child safety belt eccentric guide wheel; 16-Guide wheel torsion spring; 17-Child safety belt crotch strap; 18-Power supply interface; 19-Drive circuit. DETAILED DESCRIPTION

[0023] The present invention provides an intelligent child safety seat and a control method thereof, which can adaptively tighten shoulder belts according to vehicle driving conditions. The specific structure and working principle of the present invention are further described below with reference to the accompanying drawings.

[0024] The present invention is a smart child safety seat that can adapt the shoulder belt to the vehicle's driving conditions. Figure 1 、 2 3, mainly comprising: a child safety seat body (2), wherein the child safety seat body is provided with a vehicle driving road condition detection device (9), a computing device (13), a shoulder belt tightening execution device and an audible and visual warning device (10), wherein the shoulder belt tightening execution device is composed of a driving circuit (19), a motor (4), a gear set (6) and a seat belt reel (7), and the child safety seat body is provided with an interface (18) on the outside for supplying energy to various internal devices.

[0025] The child safety belt of the child safety seat comprises a child safety belt shoulder belt (3) with a locking tongue (11) and a child safety belt crotch belt (17) with a lock buckle (12); the other end of the child safety belt shoulder belt is fixed on a safety belt reel (7), and the safety belt reel (7) is connected to a motor (4) of a shoulder belt tightening actuator via a gear set (6); the other end of the child safety belt crotch belt (17) is fixed on a child safety seat body (2).

[0026] A cable for supplying energy to each device is connected between the vehicle driving road condition detection device (9), the calculation device (13), the shoulder belt tightening execution device drive circuit (19), the sound and light warning device (10), the buckle (12) of the child safety belt crotch strap (17), and the energy supply interface (18) outside the child safety seat body; the energy supply circuit of each device is connected or disconnected by inserting or removing the buckle (12) through the lock tongue (11) of the child safety belt shoulder strap.

[0027] The working principle of the present invention is as follows Figure 4 As shown, it is explained as follows:

[0028] First, the child safety seat is installed on the vehicle seat through the necessary installation and fixing devices such as the fixing interface and the drawstring; then the power supply interface (18) is connected to the vehicle's power supply; then the child is placed in the child safety seat body (2), and the child's arms are passed through the child safety belt shoulder straps (3) on the left and right sides. The child safety belt eccentric guide wheel (15) generates a certain degree of pre-tightening on the child safety belt shoulder straps (3) due to the twisting action of the guide wheel torsion spring (16); the left and right child safety belt shoulder strap lock tongues (11) are inserted into the child safety belt crotch belt buckle (12) at the same time, and while the child is restrained in the seat, the power is also turned on for each device inside the child safety seat body (2).

[0029] Then, the vehicle driving road condition detection device (9) detects the vehicle driving acceleration in three directions, and the calculation device (13) performs calculation analysis through a software algorithm to determine whether the vehicle has started to drive. If the vehicle is not driving, the vehicle driving road condition detection device (9) continues to detect the vehicle driving acceleration in each direction; if the vehicle is driving and continues for a period of time, the adaptive shoulder belt tightening function is automatically started, and the vehicle driving acceleration in three directions detected by the vehicle driving road condition detection device (9) is sent to the calculation device (13) for calculation analysis according to the algorithm to determine whether the vehicle driving state is stable.

[0030] If the vehicle is in a stable driving state or is parked, the vehicle driving road condition detection device (9) continues to detect the vehicle driving acceleration in all directions and sends it to the calculation device (13);

[0031] If the vehicle is in an unsteady driving state, the computing device (13) performs calculation and analysis according to the algorithm based on the vehicle's driving acceleration and outputs control parameters of the motor (4) of the shoulder belt tightening actuator. After receiving the control parameters, the shoulder belt tightening actuator controls the motor (4) to rotate through the driving circuit (19), and drives the seat belt reel (7) through the gear set (6) to tighten the child safety belt shoulder strap (3), thereby more effectively restraining the child in the child safety seat.

[0032] When the child safety belt shoulder strap lock tongue (11) is always inserted into the child safety belt crotch strap lock buckle (12), the vehicle driving road condition detection device (9) continuously detects the vehicle driving acceleration in all directions and sends it to the calculation device (13) to determine whether the vehicle driving state is stable through a software algorithm.

[0033] When the child safety belt shoulder belt lock tongue (11) is pulled out from the child safety belt crotch belt buckle (12), the adaptive shoulder belt tightening function stops, and each device in the child safety seat body (2) is powered off.

Claims

1. An intelligent child safety seat that can automatically tighten its shoulder belts according to the vehicle's driving conditions, featuring Mainly include: A child safety seat body (2) is provided with a vehicle road condition detection device (9), a calculation device (13), a shoulder belt tightening execution device, and an audible and visual warning device (10) inside the child safety seat body, and an interface (18) is provided outside the child safety seat body for supplying energy to the detection, calculation, shoulder belt tightening execution, and other devices; The vehicle driving road condition detection device (9) inside the child safety seat body is composed of a device based on the inertia principle, which can detect the vehicle driving acceleration along the three coordinate axis directions in the vehicle coordinate system; The computing device (13) inside the child safety seat body can calculate the vehicle acceleration data obtained by the vehicle road condition detection device through a software algorithm to generate control parameters for controlling the action of the shoulder belt tightening execution device; The shoulder belt tightening execution device inside the child safety seat body is composed of a drive circuit (19), a motor (4), a gear set (6) and a child safety seat belt reel (7), and can tighten or loosen the child safety seat belt according to the action control parameters generated by the computing device (13); The child safety seat body comprises a fixing interface for mounting the seat on a vehicle seat, a drawstring and other necessary mounting and fixing devices, and a child safety belt shoulder strap (3), a crotch strap (17), a safety belt reel (7), a locking tongue (11), a buckle (12) and other necessary restraining devices for restraining a child in the seat; A cable for supplying energy to each device is connected between an energy supply interface (18) provided on the outside of the child safety seat body and each device and the safety belt buckle (12) inside.

2. The intelligent child safety seat capable of adaptively tightening shoulder belts according to vehicle driving conditions according to claim 1, characterized in that: The vehicle driving road condition detection device (9), the calculation device (13), the shoulder belt tightening execution device and the sound and light warning device (10) inside the child safety seat body are powered on, loaded when the safety belt lock tongue (11) of the child safety seat is inserted into the safety belt buckle (12), and terminated when the safety belt buckle (12) is pulled out; when the safety belt lock tongue (11) is inserted into or pulled out of the safety belt buckle (12), the sound and light warning device (10) inside the child safety seat will emit a sound and light prompt signal.

3. The intelligent child safety seat capable of adaptively tightening shoulder belts according to vehicle driving conditions according to claim 1, characterized in that: The adaptive shoulder belt tightening function of the child safety seat is activated after the various devices inside the child safety seat body are powered on. The computing device (13) calculates and analyzes the vehicle driving acceleration detected by the vehicle driving road condition detecting device (9) according to an algorithm, and automatically starts when a change in the vehicle acceleration is detected and persists for a period of time; and stops when the child safety seat's seat belt lock tongue (11) is pulled out of the seat belt buckle (12).

4. The intelligent child safety seat capable of adaptively tightening shoulder belts according to vehicle driving conditions according to claim 1, characterized in that: The child safety seat can determine whether the vehicle's driving state is stable based on the vehicle's driving acceleration in each direction output by the vehicle driving road condition detection device (9), and output control parameters for controlling the action of the shoulder belt tightening execution device. By tightening the seat shoulder belt when the vehicle is in an unstable driving state, the child can be more effectively restrained in the child safety seat, thereby reducing the possible damage to the child caused by the unstable vehicle driving and improving the protective effect of the child safety seat.

5. The intelligent child safety seat capable of adaptively tightening shoulder belts according to vehicle driving conditions according to claim 1, characterized in that: A battery compartment can be provided inside the child safety seat body (2) and batteries can be installed therein. When there is no power input to the external power supply interface (18) of the child safety seat body, the batteries in the battery compartment can be used to power various devices inside the child safety seat and complete the function of adaptively tightening the shoulder belt according to the vehicle's driving conditions.

6. The intelligent child safety seat capable of adaptively tightening shoulder belts according to vehicle driving conditions according to claim 1, characterized in that: A rechargeable battery may also be provided inside the child safety seat body (2), and charged by an external power supply interface (18) of the child safety seat body; When there is no power input to the external power supply interface of the child safety seat body, the rechargeable battery can also be used to power various devices inside the child safety seat and complete the adaptive shoulder belt tightening function according to the vehicle's driving conditions.

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