CN105416118B - A kind of Shockproof type child safety seat and Shockproof method - Google Patents

Abstract

The invention discloses a shock-absorbing child safety seat, comprising: a safety seat, which includes a seat and a headrest arranged on the top of the seat back; a shock absorber, which is arranged at the bottom of the safety seat, and includes bumps Shock-absorbing device and damping-shock-absorbing device; the present invention also discloses a shock-absorbing method for a child safety seat. By calculating the collision probability, an early warning is given before the vehicle collides. When a collision occurs, the impact force generated by the collision is calculated to determine the The inflation and opening conditions of the airbag of the safety seat can protect the safety of children to the greatest extent.

Description

Shock-absorbing child safety seat and shock-absorbing method

technical field

The invention relates to the field of child safety seats, in particular to a shock-absorbing child safety seat and a shock-absorbing method for the child safety seat.

Background technique

A child safety seat is a seat specially designed for children of different weights (or age groups), installed in a car, and can effectively improve the safety of children in a car. The definition of the European mandatory implementation standard ECE R44/03 is: a child safety protection system that can be fixed to a motor vehicle and has a seat belt assembly or flexible parts, adjustment mechanisms, accessories, etc. with an ISOFIX interface.

In the design process of child safety seats, its safety protection performance is the primary consideration in the research and design process, but the safety seat can only play a protective role during the accident during use, not before the accident occurs. Forewarning.

The protective effect of child safety seats depends too much on the design of the seat material. Rebound pads are added to the head, sides of the body and calves of the child, and the back surface is softer and more comfortable, so that the child can be protected, and the protection method is single.

Contents of the invention

An object of the present invention is to design and develop a shock-absorbing child safety seat, in which a shock absorber and a damping shock absorber are installed at the bottom of the seat to ensure the comfort of the child during the bumping and vibration of the vehicle.

Another object of the present invention is to design and develop a shock-absorbing method for child safety seats. By calculating the collision probability, an early warning is given before the vehicle collides. When a collision occurs, the impact force generated by the collision is calculated to determine the safety of the child safety seat. The inflation and opening conditions of the airbag maximize the protection of children's safety.

The technical scheme provided by the invention is:

A shock-absorbing child safety seat, characterized in that it comprises:

a safety seat, which includes a seat and a headrest positioned on top of the seat back;

A bumpy shock absorber, which is arranged at the bottom of the safety seat;

The damping and shock absorbing device, which is arranged at the bottom of the safety seat, includes:

The positioning connecting rod is a frame structure;

Correction steel plate, which is connected and fixed in the middle of the positioning connecting rod, and is used to fix the supporting frame structure;

A plurality of shape memory alloy wire bundles are arranged symmetrically between the correcting steel plate and the positioning connecting rod for flexible connection between the steel plates.

Preferably, a horizontal spring is arranged between the seat and the seat back to slow down the impact force when the car collides front and rear.

Preferably, the bump absorber, which is arranged on the bottom of the safety seat, includes:

The positioning seat is provided with round holes at both ends, fixed on the bottom of the safety seat, and is provided with an anti-slip pad at the bottom;

The upper cover is arranged on the top, with a round hole in the center and a chute at the bottom;

A sleeve, which is sleeved outside the chute of the upper cover, and the chute can slide up and down along the sleeve;

The spring is fixed between the upper cover and the positioning seat, and when the spring is fully compressed, the bottom of the chute does not reach the top of the positioning seat.

Preferably, an optical safety early warning device is also included, which is arranged at the position of the front bumper of the car, the rear of the car and the side of the car body, and is used to detect the distance between the car and surrounding obstacles and give an early warning.

Preferably, the optical safety early warning device includes:

Rangefinder, which uses an infrared laser rangefinder to detect the distance between the vehicle and surrounding obstacles;

Collision Energy Meter, which includes:

case;

a rolling ball, which is arranged inside the shell and can roll inside the shell;

a magnet, which is arranged at one end of the housing, is used to attract the rolling ball;

The load cell is arranged at the other end of the casing, and is used to detect the impact force generated by the rolling ball rolling to the position of the load cell.

Preferably, self-locking seat belts are also included, including:

seat belt webbing;

The airbag is made of rubber, and is connected inside the webbing of the seat belt, with an opening at one end and communicated with the gas generator;

The magnetic buckle is set in the middle of the seat belt.

Preferably, the magnetic buckle includes: a first lock body and a second lock body that cooperate with each other;

The first lock body includes: a first magnet, and a through hole is arranged at a central position;

An unlocking buckle, which runs through the entire through hole and can move along the through hole;

The second lock body includes: a second magnet, and a through hole is arranged at a central position;

The locking buckle is fixed inside the through hole of the second magnet.

Preferably, it is characterized in that it also includes an alarm for safety warning.

The purpose of the present invention can also be further achieved by a method for shock absorption of a child safety seat, comprising the following steps:

Step 1: The distance meter detects the distance l of surrounding obstacles in real time, records the vehicle speed v in real time, and calculates the collision probability

Where L _c is the length of the vehicle body;

Step 2: When , the vehicle is prone to collision, the self-locking seat belt is locked, the seat belt cannot be opened artificially, the alarm sounds, and the safety seat moves backward along the guide rail;

when , the probability of vehicle collision is very small, the self-locking safety belt is in a buckled state, and the safety belt can be opened artificially;

in, is the average collision probability;

Step 3: The collision energy meter measures the impact force F _b of the rolling ball through the load cell,

When F _b = 0, the vehicle runs smoothly without collision;

When F _b > 0, calculate the impact coefficient

Among them, ρ _c is the restitution coefficient, k is the resistance characteristic coefficient, λ is the instantaneous friction coefficient, and m _b is the rolling ball mass.

Step 4: When When the vehicle collides violently, the gas generator 630 fills the airbag with gas;

when When the vehicle collides, but the occupants will not be injured, the self-locking seat belt is locked, the seat belt cannot be opened artificially, and the alarm sounds.

in, is the average impact coefficient.

Beneficial effects of the present invention

1. The shock-absorbing child safety seat provided by the present invention is equipped with a shock absorber and a damping shock absorber at the bottom of the seat, taking into account the up and down bumps of the vehicle or the left and right turns, and even the inertia generated by the children in the car during the collision process. The force ensures the comfort of children when the vehicle is bumping and vibrating.

2. The shock-absorbing child safety seat provided by the present invention fully considers the characteristics of children's self-care ability and strong curiosity, and provides a self-locking seat belt, which can realize the automatic fastening and locking functions of the seat belt.

3. The present invention also provides a shock absorbing method for a child safety seat, and has designed and developed a shock absorbing method for a child safety seat. By calculating the collision probability, an early warning is given before the vehicle collides, and when a collision occurs, the collision result is calculated. The impact force can determine the opening conditions of the airbag of the child safety seat, so as to protect the safety of children to the maximum extent.

4. The present invention can also set variables and select car models according to the size of different vehicles. When in use, the present invention has wider application by setting parameters.

Description of drawings

Fig. 1 is a structural schematic diagram of a shock-absorbing child safety seat according to the present invention.

Fig. 2 is a structural schematic diagram of the bumping and shock absorbing device according to the present invention.

Fig. 3 is a structural schematic diagram of the damping and shock absorbing device according to the present invention.

Fig. 4 is a sectional view of the collision energy meter according to the present invention.

Fig. 5 is a schematic structural diagram of the self-locking safety belt according to the present invention.

Fig. 6 is a schematic structural diagram of the magnetic buckle according to the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in Figure 1, the shock-absorbing child safety seat provided by the present invention includes:

A safety seat 100, a shock absorber 300 and an optical safety early warning device.

Wherein the safety seat 100 includes a seat 110, a seat back 120 and a headrest 130 arranged on the top of the seat back;

A horizontal spring is arranged between the seat 110 and the seat back 120 for slowing down the impact force when the car collides front and rear.

A shock absorber 300, which is arranged at the bottom of the safety seat 100, and includes a bumpy shock absorber 310 and a damping shock absorber 320;

As shown in FIG. 2 , the bump and shock absorber 310 includes a positioning seat 311 with round holes at both ends, fixed on the bottom of the safety seat 100, and an anti-slip pad 312, an adjusting bolt 313, a spring 314, and an upper The center of the cover 315 is provided with a round hole, and the bottom is provided with a chute. The spring 314 is fixed between the upper cover 315 and the positioning seat 311 through the fixing bolt 317. The sleeve 316 is sleeved outside the chute of the upper cover 315. , the upper cover 315 slides up and down along the sleeve 316, the spring 314 is arranged between the upper cover 315 and the sleeve 316, and when the spring 314 is fully compressed, the bottom of the chute of the upper cover 315 does not reach the top of the positioning seat 311.

As shown in Figure 3, the damping and shock absorbing device 320 includes, the positioning link 321, its number is two, is arranged in the middle of the guide rail 200, forms a frame structure with the guide rail 200, and the correction steel plate 322, its number is two One, which is connected and fixed in the middle of the positioning link 321, used to fix the supporting frame structure; the number of shape memory alloy wire bundles 323 is multiple, symmetrically arranged between the correction steel plate 322 and the guide rail 200, fixed by bolts , for flexible connections between steel plates.

Optical safety early warning device, which is installed at the position of the front bumper of the car, the rear of the car and the side of the car body, is used to detect the distance between the car and surrounding obstacles and give an early warning;

The range finder, which uses an infrared laser range finder, is used to detect the distance between the vehicle and surrounding obstacles.

As shown in Figure 4, the collision energy meter includes: a housing 510; a rolling ball 520, which is arranged inside the housing, and can roll inside the housing; a magnet 530, which is provided at one end of the housing, for attracting Rolling ball: Load cell 540, which is arranged at the other end of the housing, is used to detect the impact force generated by rolling the ball to the position of the load cell. When no impact occurs, the rolling ball 520 and the magnet 530 attract each other , the value measured by the load cell 540 is zero, when a collision occurs, the impact force is greater than the force between the rolling ball 520 and the magnet 530, the rolling ball 520 rolls to the other side of the housing, reaches the load cell 540, and measures The force sensor 540 records the impact force generated by the rolling ball reaching the position of the load cell at this moment.

As shown in Figure 5, it also includes a self-locking seat belt, including: a seat belt webbing 610; an airbag, which is made of rubber, is threaded and connected inside the seat belt webbing 610, and one end is provided with an opening, and is connected to the gas generator 630 Connection; the magnetic buckle 640 is arranged in the middle of the safety belt. When the gas generator 630 fills the airbag with gas, the safety webbing 610 bulges and is supported into a fixed shape. The first lock body 641 and the second lock body 642 of the magnetic buckle 640 attract each other and automatically buckle together. After the gas is discharged from the airbag, the airbag also has another function to fill in the gas when the vehicle collides, forming an air cushion in front of the child safety seat to improve the safety of children in the car.

As shown in Figure 6, the magnetic lock 640 includes a first lock body 641 and a second lock body 642 that cooperate with each other, wherein the first lock body 641 contains a first magnet 643, and a through hole is provided at the center to unlock The buckle runs through the entire through hole and can move along the through hole. It includes elastic arms 644a, which are two in number, arranged symmetrically, with a certain accommodation space in the middle, and a protrusion 644d at the top; an extension arm 644b, which is connected to The elastic arm 644a is also provided with a card slot 644c in the middle position, and the fixing pin 647 is arranged on both sides of the through hole in the first lock body 641 for fixing the relative position of the unlocking button 644 and the through hole. The second lock body 642 contains the first Two magnets 645 are provided with a through hole at the central position, and the locking buckle is fixed in the through hole. It includes a ball post 646a, the top of which is spherical, and the bottom is a support body. The ball post 646a cooperates with the extension arm 644b to make the first The lock body 641 and the second lock body 642 are snapped together, wherein the magnetic poles of the first magnet 643 and the second magnet 645 are opposite and attract each other.

Implementation Take the working process of the self-locking safety belt as an example for further explanation,

In the fastening process of the seat belt, first, after the gas generator 630 fills the airbag with gas, the safety webbing 610 is bulged and supported into a fixed shape, and the first lock body 641 and the second lock body 642 of the magnetic buckle 640 The first magnet 643 and the second magnet 645 attract each other, and the elastic arm 644a and the ball post 646a buckle together. The hole slides outwards, and the fixing pin 647 pops up, and the relative position between the unlock button 644 and the through hole is fixed to realize the locking process, the gas generator 630 stops working, and the gas is discharged from the airbag.

During the unlocking process of the seat belt, the fixed pin 647 retracts, pushes the extension arm 644b, the unlocking buckle 644 slides along the through hole, the first magnet 643 and the second magnet 645 are separated under the reaction force, the elastic arm 644a pops out from the through hole, and the elastic arm 644a and ball post 646a are unlocked, thereby realizing the unlocking process.

In another embodiment, a siren is also included for safety warning.

The working process of the present invention can also be further realized by a shock absorbing method for a child safety seat, comprising the following steps:

Step 1: The range finder detects the distance l of the surrounding obstacles in real time, the unit is m; records the vehicle speed v in real time, the unit is m/s, and calculates the collision probability,

Where L _c is the length of the vehicle body in m;

Step 2: When , the vehicle is prone to collision, the self-locking seat belt is locked for 20 to 30 seconds, the seat belt 610 cannot be opened artificially, the alarm sounds, and the safety seat 100 moves backward along the guide rail 200;

when , the probability of vehicle collision is very small, the self-locking safety belt is in a buckled state, and the safety belt 610 can be opened artificially;

Step 3: The collision energy meter measures the impact force F _b of the rolling ball through the load cell 540, the unit of which is N,

When F _b = 0, the vehicle runs smoothly without collision;

When F _b > 0, calculate the impact coefficient,

Among them, ρ _c is the restitution coefficient, which is a constant, and the value is _0.32 ; k is the resistance characteristic coefficient, which is a constant, and the value is 0.6; λ is the instantaneous friction coefficient, and the value is 0.7; kg.

Step 4: When When the vehicle collides violently, the gas generator 630 fills the airbag with gas;

when When the vehicle collides, but the occupants will not be injured, the self-locking seat belt is locked, the seat belt 610 cannot be opened artificially, and the alarm sounds.

in, is the average collision probability; is the average impact coefficient, and is pre-stored in the controller.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (8)

1. A shock-absorbing child safety seat, comprising:

a safety seat including a seat and a headrest disposed on top of a seat back;

a jounce cushioning device provided at the bottom of the safety seat;

damping seismic isolation device, it sets up safety seat bottom, it includes:

the positioning connecting rod is of a frame type structure;

the correcting steel plate is fixedly connected in the middle of the positioning connecting rod in a penetrating manner and is used for fixing a supporting frame structure;

the shape memory alloy tows are symmetrically arranged between the correcting steel plates and the positioning connecting rods and used for flexible connection between the steel plates;

the jounce bumper comprises:

the two ends of the positioning seat are provided with round holes, the positioning seat is fixed at the bottom of the safety seat, and the bottom of the positioning seat is provided with an anti-skid pad;

the upper cover is arranged at the top, a round hole is formed in the center of the upper cover, and a sliding groove is formed in the bottom of the upper cover;

the sleeve is sleeved outside the sliding groove of the upper cover, and the sliding groove can slide up and down along the sleeve;

and the spring is fixed between the upper cover and the positioning seat, and the bottom of the sliding groove does not reach the top of the positioning seat in a fully compressed state of the spring.

2. A suspension child safety seat according to claim 1, wherein a horizontal spring is provided between the seat and the seat back for cushioning the impact force of the vehicle during a front-to-rear collision.

3. A shock-absorbing child safety seat according to claim 1, further comprising optical safety pre-warning devices disposed at the front bumper, the rear end and the side of the vehicle body for detecting the distance between the vehicle and the surrounding obstacles and performing pre-warning.

4. A shock-absorbing child safety seat according to claim 3, wherein said optical safety precaution includes:

a distance meter which adopts an infrared laser distance meter and is used for detecting the distance between the vehicle and surrounding obstacles;

a collision energy meter, comprising:

a housing;

a rolling ball which is arranged inside the shell and can roll inside the shell;

the magnet is arranged at one end of the shell and is used for attracting the rolling ball;

and the force transducer is arranged at the other end of the shell and used for detecting the impact force generated when the rolling ball rolls to the position of the force transducer.

5. A shock-absorbing child safety seat according to claim 4, further comprising a self-locking harness comprising:

a seat belt webbing;

the safety airbag is made of rubber, penetrates into the safety belt braid, is provided with an opening at one end and is communicated with the gas generator;

and the magnetic lock catch is arranged in the middle of the safety belt.

6. A shock-absorbing child safety seat according to claim 5, wherein the magnetic catch comprises: the first lock body and the second lock body are matched with each other;

the first lock body includes: a first magnet having a through hole at a central position;

the unlocking buckle penetrates through the whole through hole and can move along the through hole;

the second lock body includes: a second magnet having a through hole at a central position;

and the locking buckle is fixed inside the second magnet through hole.

7. A shock absorbing child safety seat according to any one of claims 1, 4, 5 and 6, further comprising an alarm for safety warning.

8. A method of cushioning a child safety seat comprising the cushioning child safety seat of any of claims 5 and 6, comprising the steps of:

the method comprises the following steps: the distance meter detects the distance l of surrounding obstacles in real time, records the vehicle speed v in real time, and calculates the collision probability

Wherein L is_cIs the length of the car body;

step two: when in useWhen the automobile is very easy to collide, the self-locking safety belt is locked for 30-50 seconds, the safety belt cannot be opened manually, and the alarm sounds;

when in useWhen the automobile is in collision, the probability of the automobile collision is very small, the self-locking safety belt is in a buckled state, and the safety belt can be opened manually;

wherein,is the average collision probability;

step three: the collision energy meter measures the impact force F of the rolling ball through the force transducer_b，

When F is present_bWhen the value is 0, the vehicle runs stably and no impact occurs;

when F is present_bWhen the pressure is more than 0, calculating the impact coefficient

Where ρ is_cFor coefficient of restitution, k is the coefficient of drag characteristic, λ is the instantaneous coefficient of friction, m_bThe rolling ball mass;

step four: when in useWhen the vehicle is in violent collision, the gas generator (630) fills gas into the safety airbag;

when in useWhen the automobile collides, but the automobile cannot be injured by people in the automobile, the self-locking safety belt is locked, the safety belt cannot be opened manually, and the alarm sounds;

wherein,is the average impact coefficient.