CN106627273A - Buffer-type base of child safety seat - Google Patents

Abstract

The invention provides a cushioned base of a child safety seat, which includes a mechanical rotating device and a control system. On the bracket, one end of the lever is connected to the tail of the cushion frame, and the other end is connected to the pull rope, and the end of the pull rope is wound on the rotation shaft of the motor; the acceleration sensor senses the vehicle collision acceleration signal, and the control circuit analyzes The collected acceleration sends out a control signal to control the rotation of the motor; and then drives the motor to rotate through the drive circuit. Thereby, the lever is driven to rotate downwards by the pull rope, so that the cushion is rotated upwards. Thereby preventing the child's body from leaning forward due to inertial force, protecting the child and mitigating the damage of multiple body parts of the child, including the head, neck, chest and spine. The buffer base is designed according to the principle of leverage, which is simple in structure, safe and practical.

Description

A buffer base of a child safety seat

technical field

The invention relates to a child safety seat, in particular to a cushionable base of the child safety seat, which can effectively reduce the collision impact on children, protect the safety of children and improve the safety of child occupants.

Background technique

Currently, due to the emergence of child occupant regulations in motor vehicles, child safety seat manufacturers also produce a variety of child safety seats suitable for different sizes and age groups. However, the current child safety seats generally have some defects, especially when the vehicle is subjected to a frontal collision, the acceleration of the child's head, the acceleration of the chest and the displacement of the child's head are too large, resulting in varying degrees of injury or even death of the child. When the vehicle is subjected to a frontal collision, the child in the child safety seat will generate a severe forward impact force due to inertia, and at this time the head displacement and the acceleration of the head and chest will begin to increase. If the vehicle is rotated upwards and the seat cushion is raised in time when the vehicle starts to receive a frontal collision to buffer the inertial force of the child rushing forward, the degree of injury of the child occupant can be effectively reduced.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of the prior art, provide a cushioning base of a child safety seat that can effectively reduce the degree of injury of the child occupant, and buffer the collision impact on the child occupant.

The technical solution adopted by the present invention to solve its technical problems is:

A buffer base of a child safety seat, including a mechanical rotating device and a control system, characterized in that,

The mechanical rotating device includes a rigid bottom shell, a seat cushion, a support frame, an iron lever, a pull rope, and a motor. The seat cushion is hinged to the seat back, and a support frame and a motor are fixed inside the rigid bottom shell. The iron lever is rotatably mounted on the bracket around the fulcrum, one end of the lever is connected with the tail of the cushion frame, and the other end is connected with the pull rope, and the end of the pull rope is wound around the motor. on the axis of rotation;

The control system includes an acceleration sensor, an amplification circuit, an A/D conversion module, a data storage module, a control circuit, and a drive circuit, and the acceleration sensor is connected to the data storage module and the control circuit in sequence through the amplification circuit and the A/D conversion module, The control circuit is also connected with the drive circuit, and the drive circuit is connected with the motor,

The acceleration sensor is used to perceive the vehicle collision acceleration signal, and the signal is amplified and converted by the amplification circuit and the A/D conversion module, and then transmitted to the control circuit and the data storage module. The control circuit analyzes the collected acceleration. When the acceleration a is When between a ₁ and a ₂ , a control signal to control the clockwise rotation of the motor is issued, where 20g≤a ₁ <a<a ₂ ≤28g, g is the acceleration of gravity; when the range of acceleration a is: 0≤a< When a ₁ or a > a ₂ , a control signal to control the motor to stop rotating is issued; the control circuit sends a high and low level control signal for the motor to rotate through the internal control program; and then drives the motor to rotate through the drive circuit.

Further, the length of the power arm of the lever is greater than the length of the resistance arm.

Further, the data storage module adopts an EEPROM memory chip; the control circuit adopts a single-chip microcomputer.

Further, an iron ring is fixed at one end of the iron lever connected to the pulling rope, and the pulling rope is tied to the iron ring.

Further, the backrest and the seat cushion of the child safety seat are connected by a pin rotation; the seat cushion can be rotated between 10° and 45° relative to the horizontal direction.

When the vehicle has a frontal collision, the acceleration sensor senses the acceleration signal of the vehicle collision, sequentially passes through the amplification circuit, A/D conversion, and data storage, and transmits the obtained digital signal to the control circuit. The control circuit analyzes the collected acceleration and sends out a control motor. Rotation control signal; and then drive the motor to rotate through the drive circuit. When the motor rotates, it drives the pull rope, so that the pull rope is continuously wound on the motor shaft, thereby driving the lever to rotate downward through the pull rope. The cushion swivels upwards. Thereby preventing the child's body from leaning forward due to inertial force, protecting the child and mitigating the damage of multiple body parts of the child, including the head, neck, chest and spine. The buffer base is designed according to the principle of leverage, which is simple in structure, safe and practical.

Description of drawings

Fig. 1 is a structural schematic diagram of a buffer base of a child safety seat according to the present invention.

Figure 2 is a block diagram of the loose control system.

Fig. 3 is a working principle diagram of the buffer base of the child safety seat of the present invention.

In the picture:

1. Bottom shell, 2. Support frame, 3. Lever, 4. Iron ring, 5. Motor, 6. Backrest, 7. Cushion, 8. Pull rope.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

The buffer base of the child safety seat according to the present invention includes a mechanical rotating device and a control system, and the mechanical rotating device includes a rigid bottom shell 1, a seat cushion 7, a support frame 2, an iron lever 3, and a pulling rope 8 . The motor 5, the control system includes an acceleration sensor, an amplification circuit, an A/D conversion module, a data storage module, a control circuit, and a drive circuit. The present invention can be installed on the existing child safety seat. Referring to FIG. 1, it can be installed on the bottom of the seat cushion 7. One end of the lever 3 in the bottom shell 1 needs to be connected to the cushion frame 7, and the other end of the lever 3 has an iron Ring 4. The iron ring 4 is connected with the rotating shaft of the motor 5 by a pull rope 8 tied thereon. Connection can select multiple connection methods, but the connection of lever 3 and cushion frame 7, lever 3 and support frame 2 must be rigid hinge connection. The layout of the lever 3: the end of the lever 3 connecting the iron ring 4 is far away from the support frame 2, and the end of the lever 3 connecting the cushion 7 afterbody is closer to the support frame 2. According to the principle of leverage, this arrangement can make the force of the lever 3 jacking up the seat cushion 7 greater, and it is easy to jack up the seat cushion 7 . The bottom shell 1 needs to be rigid, and the lever 3 is an iron lever.

The backrest 6 and the seat cushion 7 of the child safety seat are connected by a bolt rotation. Cushion 7 can rotate upwards around latch, can rotate downwards. The cushion can rotate between 10° and 45° from the horizontal direction.

As shown in Figure 2, the acceleration sensor of the control system is connected to the data storage module and the control circuit in turn through the amplification circuit and the A/D conversion module, and the control circuit is also connected to the drive circuit, and the drive circuit is connected to the motor 5 . The acceleration sensor is used to perceive the vehicle collision acceleration signal, and the signal is amplified and converted by the amplification circuit and the A/D conversion module, and then transmitted to the control circuit and the data storage module. The control circuit analyzes the collected acceleration. When the acceleration a is Between a ₁ and a ₂ , a control signal to control the clockwise rotation of the motor 5 is issued, where 20g≤a ₁ <a<a ₂ ≤28g, g is the acceleration of gravity; when the range of acceleration a is: 0≤a When <a _{1 or a>} a ₂ , a control signal for controlling the motor 5 to stop rotating is issued; the control circuit sends a high and low level control signal for the motor 5 to rotate through the internal control program; and then the motor 5 is driven to rotate through the drive circuit.

The motor 5 is fixed on the base, and can be rigidly connected with the base through bolts. When no collision occurs, the lever 3 is in a balanced state, and the lever 3 can only rotate around the pivot point in the plane shown in the figure. The pulling rope 8 is in a state of tension but no stress, and the two ends of the pulling rope 8 are respectively connected with the hoop 4 and the rotating shaft of the motor 5 , and a part of the length is wound on the rotating shaft of the motor 5 .

When the vehicle has a frontal collision, the acceleration sensor in the control system senses the acceleration signal of the vehicle collision, sequentially passes through the amplification circuit, A/D conversion, and data storage, and transmits the obtained digital signal to the control circuit, and the control circuit analyzes the collected acceleration. , and send a control signal to control the rotation of the motor 5, wherein a1<a2; the control circuit can be realized by a single-chip microcomputer; and then the motor 5 is driven to rotate through the drive circuit.

As shown in Figure 3, when the motor 5 rotates, it drives the pulling rope 8, so that the pulling rope 8 is continuously wound on the rotating shaft of the motor 5, thereby pulling the other end iron ring 4 of the pulling rope 8, and the iron ring 4 drives the lever 3 Rotate downwards, during the downward rotation of lever 3, the other end of lever 3 jacks up the skeleton afterbody of cushion 7, and cushion 7 rotates upwards around latch. At this time, the force of the upward rotation of the seat cushion 7 resists the inertial force generated by the collision of the child occupant, thereby preventing the child's body from violent forward impact due to the inertial force, protecting the child and reducing the damage of multiple parts of the child, including the head, neck, chest and spine.

For the sake of safety, the above-mentioned implementation mode should also be used together with the safety belt configured on the vehicle, so as to better protect children and eliminate potential safety hazards. The cushioning base of the present invention can not only effectively reduce the degree of children's injuries and improve the safety of the child occupants, but also has the advantages of convenient installation, simple structure and convenient manufacture.

The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.

Claims (6)

1. the buffer-type base of a kind of child safety seat, including mechanical rotation device and control system, it is characterised in that

The mechanical rotation device includes rigid drain pan (1), cushion (7), bracing frame (2), iron lever (3), pulling rope (8), motor (5), are hinged between the cushion (7) and backrest (6), and inside the rigid drain pan (1) support is fixed Frame (2) and motor (5), the iron lever (3) can rotatably fill on the bracket around fulcrum, one end of the lever (3) It is connected with cushion (7) skeleton afterbody, the other end is connected with pulling rope (8), the end of the pulling rope (8) is wrapped in the motor (5) in rotary shaft；

The control system include acceleration transducer, amplifying circuit, A/D modular converters, data memory module, control circuit, Drive circuit, the acceleration transducer by amplifying circuit, A/D modular converters successively with data memory module, control circuit It is connected, the control circuit is also connected with drive circuit, and the drive circuit is connected with motor (5),

The acceleration transducer is used to perceive vehicle crash acceleration signal, and amplified circuit, A/D modular converters are put to signal Greatly, the acceleration collected to control circuit and data memory module, the control circuit analysis is transmitted after changing, works as acceleration A is in a₁And a₂Between when, send the control signal that controlled motor (5) is rotated clockwise, wherein 20g≤a₁<a<a₂≤ 28g, wherein G is acceleration of gravity；When the scope residing for acceleration a is：0≤a ＜ a₁Or a ＞ a₂When, send controlled motor (5) and stop operating Control signal；Control circuit sends the low and high level control signal of motor (5) rotation by internal control program；Lead to again Overdrive circuit motor (5) is rotated.

2. the buffer-type base of child safety seat according to claim 1, it is characterised in that the lever (3) it is dynamic Length of the length of the arm of force more than resistance arm.

3. the buffer-type base of child safety seat according to claim 1, it is characterised in that the data memory module Using EEPROM storage chips；The control circuit adopts single-chip microcomputer.

4. the buffer-type base of child safety seat according to claim 1, it is characterised in that the iron lever (3) One end of connection pulling rope (8) is fixed with iron hoop (4), and the pulling rope (8) is tied up on the iron hoop (4).

5. the buffer-type base of child safety seat according to claim 1, it is characterised in that the child safety seat Backrest (6) and cushion (7) be the rotary connection of latch.

6. the buffer-type base of child safety seat according to claim 1, it is characterised in that the cushion (7) can Rotate between from the horizontal by 10 ° to 45 °.