Child safety seat

Abstract

The present invention discloses a child safety seat, comprising a seat body and an airbag device. The airbag device comprises an airbag body. When the car is running normally, the airbag body shrinks and is accommodated in the seat body. The seat body is provided with an exit area for the airbag body to rush out of the seat body after inflation. The airbag device also comprises a human body recognition device. The human body recognition device is arranged at the exit area or in an area with a radius of a distance from the exit area with the exit area as the center. When the human body recognition device detects that there is a human body part within the exit area, the airbag body does not inflate. When the car collides and the human body recognition device detects that there is no human body part within the exit area, the airbag body inflates. When the human body recognition device detects that there is a human body part within the exit area of ​​the child safety seat, the airbag body will not inflate even if the car collides, which can avoid the inflation of the airbag body causing harm to people.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a child safety seat. Background Art

[0002] The child car seat is mainly used when children are riding in a car to protect the personal safety of the children. When in use, the child car seat is fixed on the car seat, and the child sits on the child car seat and is restrained by a safety belt. However, when the car collides, due to the inertial force caused by the strong impact force, the child's body will still rush forward, so that the child's body hits the front seat and causes harm to the child. In view of this situation, some child car seats are provided with airbag devices, which include an airbag body. When the car is driving normally, the airbag body is in a contracted state and is accommodated inside the child car seat. When the car collides, the airbag body is inflated and expanded to the outside of the child car seat to support the child's body, thereby preventing the child's body from rushing forward, further improving the safety performance of the child car seat when in use. However, in the prior art, when the car collides, the airbag body is inflated and expanded. At this time, if there are human parts such as human hands, head or legs at the exit position of the airbag body on the child car seat, the inflation and expansion of the airbag body will cause harm to the human body. Summary of the invention

[0003] The purpose of the present invention is to provide an improved child safety seat in view of the deficiencies in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A child safety seat comprises a seat body and an airbag device arranged on the seat body, the airbag device comprises an airbag body, the airbag body has a contracted state and an expanded state after being inflated, when the car is driving normally, the airbag body is in the contracted state and is accommodated in the interior of the seat body, the seat body is provided with an exit area for the airbag body to rush out of the interior of the seat body after being inflated, the airbag device also comprises a human body recognition device for identifying human body parts, the human body recognition device is arranged at the exit area, or the human body recognition device is arranged in an area with the exit area as the center and a distance from the exit area as the radius, when the human body recognition device detects that there are human body parts within the range of the exit area, the airbag body is not inflated, when the car collides and the human body recognition device detects that there are no human body parts within the range of the exit area, the airbag body is inflated and rushes out of the interior of the seat body from the exit area.

[0006] Preferably, the human body recognition device has a sensing area, which includes the exit area and an area extending a distance from the exit area to the outside of the seat body along the expansion direction of the airbag body. When a human body part enters the sensing area, the human body recognition device sends an incorrect sitting posture signal. When no human body part enters the sensing area, the human body recognition device sends a correct sitting posture signal.

[0007] Preferably, the seat body includes a block for safety protection of children, the airbag body in the contracted state is arranged in the block, the exit area is located on the upper surface of the block, the human body recognition device is arranged on the upper surface of the block, and the inflated airbag body extends upward from the upper surface of the block and covers the upper surface of the block.

[0008] Preferably, the seat body includes a block for safety protection of children, the airbag body in the contracted state is arranged in the block, the exit area is located on the lower surface of the block, the human body recognition device is arranged on the lower surface of the block, and the inflated airbag body extends downward from the lower surface of the block and covers the lower surface of the block.

[0009] Preferably, the seat body has two leg rest areas for the passengers to place their legs, the airbag body in the contracted state and the human body recognition device are both arranged in the seat body corresponding to the two leg rest areas, the exit area is located between the two leg rest areas, and the inflated airbag body extends upward from the two leg rest areas.

[0010] Furthermore, a accommodating portion is provided between the two leg rest areas on the seat body, the accommodating portion extends upward from the intersection with the leg rest area, the airbag body in a contracted state is provided inside the accommodating portion, and the human body recognition device is provided on the upper surface of the accommodating portion.

[0011] Preferably, the seat body is provided with a receiving groove for accommodating the airbag body in a contracted state, the exit area is the opening end of the receiving groove, the seat body also includes a cloth cover covering the opening end, the human body identification device is arranged on the cloth cover, when the car collides and the human body identification device detects that there is no human body part within the exit area, the airbag body inflates, breaks through the cloth cover and extends to the outside of the seat body.

[0012] Furthermore, the human body recognition device is wrapped in the cloth cover, and the thickness of the cloth cover where the human body recognition device is arranged is greater than the thickness of the remaining parts of the cloth cover.

[0013] Preferably, the airbag device also includes a sensor device for detecting a collision signal of a car, a controller and an inflation device for inflating the airbag body to expand the airbag body. The sensor device, the human body recognition device and the inflation device are all electrically connected to the controller, and the inflation device is connected to the airbag body.

[0014] Furthermore, the sensing device is used to detect the actual acceleration value during the driving of the car, and a threshold value of the acceleration during the driving of the car is set in the controller. When the actual acceleration value is greater than or equal to the threshold value, and the human body recognition device detects that there is no human body part within the exit area, the controller controls the inflation device to inflate the airbag body.

[0015] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the child safety seat of the present invention can detect whether there is a human body part in the exit area where the air bag body arranged on the seat body is inflated and rushed out of the seat body through the human body recognition device, and when the human body recognition device detects that there is a human body part in the exit area, the air bag body will not be inflated even if a car collides, thereby avoiding damage to the human body caused by the inflation of the air bag body, further improving the safety performance of the child safety seat when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 One of the structural schematic diagrams of the child safety seat of the present invention (Example 1);

[0017] Attached Figure 2 The second structural diagram of the child safety seat of the present invention (Example 2);

[0018] Attached Figure 3 Schematic diagram of the airbag device of the present invention. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1 and Figure 2 As shown, the child car seat of the present invention comprises a seat body 2 and a safety airbag device arranged on the seat body 2 .

[0021] like Figure 3As shown, the airbag device includes an airbag body 11, a sensor device 12, a controller 13, an inflating device 14 and a human body recognition device 15. The airbag body 11 is arranged in the seat body 2, which generally maintains a contracted state and can expand after being inflated. The seat body 2 is provided with an exit area for the airbag body 11 to rush out of the interior of the seat body 2 after being inflated and expanded. The inflating device 14 is connected to the airbag body 11 and is used to inflate the airbag body 11 to expand the airbag body 11. The sensor device 12 and the human body recognition device 15 are both electrically connected to the controller 13, and the controller 13 is electrically connected to the inflating device 14. The sensor device 12 is used to detect whether the car has collided and send the detected signal to the controller 13. The human body recognition device 15 is used to detect whether there are human body parts, such as human hands, head or legs, within the exit area, and send the detected signal to the controller 13. When there are human body parts within the exit area, it indicates that the occupant of the child safety seat is in an incorrect sitting position. When there are no human body parts within the exit area, it indicates that the occupant of the child safety seat is in a correct sitting position. The controller 13 receives the signals from the sensor device 12 and the human body recognition device 15, and sends a control signal, which is input into the inflator 14. The inflator 14 receives the control signal and is triggered to inflate the airbag body 11, so that the airbag body 11 expands; or the controller 13 only receives the signals from the sensor device 12 and the human body recognition device 15 without sending the control signal, and the airbag body 11 remains in a contracted state.

[0022] When the human body recognition device 15 detects that there is a human body part within the exit area, that is, the occupant of the child safety seat is in an incorrect sitting position, the controller 13 does not send a control signal, and the airbag body 11 remains in a contracted state and does not inflate. When the sensor device 12 detects that the car has collided, and the human body recognition device 15 detects that there is no human body part within the exit area, that is, the occupant of the child safety seat is in a correct sitting position, the controller 13 sends a control signal to trigger the inflation device 14 to inflate the airbag body 11, and the airbag body 11 inflates and rushes out of the interior of the seat body 2 from the exit area.

[0023] The human body recognition device 15 has a sensing area, which includes the exit area and the area extending a certain distance from the exit area to the outside of the seat body 2 along the expansion direction of the airbag body 11. When a human body part enters the sensing area, the human body recognition device 15 sends an incorrect sitting posture signal to the controller 13. The controller 13 receives the incorrect sitting posture signal but does not send a control signal, that is, the inflator 14 does not inflate the airbag body 11, and the airbag body 11 remains in a contracted state. When no human body part enters the sensing area, the human body recognition device 15 sends a correct sitting posture signal to the controller 13. The controller 13 receives the correct sitting posture signal and determines whether to send a control signal based on the signal sent by the sensor device 12. The human body recognition device 15 can be set at the exit area, or it can be set in an area with the exit area as the center and a distance from the exit area as the radius. The setting of the radius value here can be determined according to the sensing area of ​​the human body recognition device 15, as long as the sensing area of ​​the human body recognition device 15 can include the exit area and the range extending a certain distance from the exit area along the expansion direction of the airbag body 11 to the outside of the seat body 2.

[0024] In this embodiment, the sensing device 12 is an acceleration sensor, which is used to detect the actual acceleration value during the driving process of the automobile. The controller 13 is set with a threshold value of the acceleration during the driving process of the automobile. When the actual acceleration value detected by the sensing device 12 is greater than or equal to the threshold value, it means that the automobile is about to have a collision accident. At this time, if the controller 13 receives a correct sitting posture signal from the human body recognition device 15, the controller 13 sends a control signal; at this time, if the controller 13 receives an incorrect sitting posture signal from the human body recognition device 15, the controller 13 does not send a control signal. When the automobile is driving normally, that is, when the actual acceleration value detected by the sensing device 12 during the driving process of the automobile is less than the threshold value, the controller 13 does not send a control signal.

[0025] The inflation device 14 may be a gas generator having an outlet end, and the airbag body 11 has an inlet end. The outlet end of the gas generator and the inlet end of the airbag body 11 are connected via a connecting pipe 16 .

[0026] The inflation method of the gas generator to inflate the airbag body 11 is explosion inflation or cold air inflation, or a combination of explosion inflation and cold air inflation. Specifically, the gas generator includes a tube body, an ignition device arranged in the tube body, gunpowder and / or a gas generating agent, and the controller 13 is electrically connected to the ignition device, and the ignition device is used to ignite the gunpowder. Explosion inflation refers to the gas inflated into the airbag body 11 is the gas generated by the explosion of gunpowder, cold air inflation refers to the gas inflated into the airbag body 11 is the gas generated by the gas generating agent, and the inflation method combining explosion inflation and cold air inflation refers to the gas inflated into the airbag body 11 includes both the gas generated by the explosion of gunpowder and the gas generated by the gas generating agent. When the cold air inflation method is adopted, the gas generated by the gunpowder explosion can be prevented from causing harm to children and polluting the environment. Taking all factors into consideration, the inflation method combining explosion inflation and cold air inflation is generally adopted, and this inflation method is also adopted in this embodiment. In this way, the airbag body 11 can be rapidly deployed in a very short time to form an elastic air cushion to absorb impact energy, thereby effectively protecting the child from injury or reducing the degree of injury.

[0027] The specific installation position of the airbag body 11 in the seat body 2 can adopt the following two embodiments:

[0028] Example 1

[0029] In this embodiment, if Figure 1 As shown, the seat body 2 includes a stopper 21 for safety protection of children, the airbag body 11 in a contracted state is arranged in the stopper 21, the exit area is located on the upper surface of the stopper 21, the human body recognition device 15 is arranged on the upper surface of the stopper 21, and the inflated airbag body 11 extends upward from the upper surface of the stopper 21 and covers the upper surface of the stopper 21. Alternatively, the exit area may also be located on the lower surface of the stopper 21, the human body recognition device 15 is arranged on the lower surface of the stopper 21, and the inflated airbag body 11 extends downward from the lower surface of the stopper 21 and covers the lower surface of the stopper 21.

[0030] Example 2

[0031] In this embodiment, if Figure 2 As shown, the seat body 2 has two leg rest areas 22 for the passengers to place their legs, the airbag body 11 in the collapsed state and the human body recognition device 15 are both arranged in the seat body 2 corresponding to the two leg rest areas 22, the exit area is located between the two leg rest areas 22, and the inflated airbag body 11 extends upward from between the two leg rest areas 22.

[0032] Specifically, a receiving portion 23 is provided between the two leg rest areas 22 on the seat body 2, and the receiving portion 23 extends upward from the intersection with the leg rest area 22, the airbag body 11 in a contracted state is arranged in the receiving portion 23, and the human body recognition device 15 is arranged on the upper surface of the receiving portion 23.

[0033] In the above two embodiments, the stopper 21 and the accommodating portion 23 are both provided with a receiving groove for receiving the airbag body 11 in a contracted state, the exit area is the open end of the receiving groove, the seat body 2 also includes a cloth cover 24 covering the open end, the human body identification device 15 is provided on the cloth cover 24, and the human body identification device 15 is located on the cloth cover 24 at one end facing the receiving groove or is covered in the cloth cover 24, so that the appearance of the child safety seat is neat and beautiful. When the car collides and the human body identification device 15 detects that there is no human body part within the exit area, the airbag body 11 inflates and breaks through the cloth cover 24 to extend to the outside of the seat body 2.

[0034] Preferably, the human identification device 15 is covered in a cloth cover 24, and the thickness of the cloth cover 24 where the human identification device 15 is provided is greater than the thickness of the remaining parts of the cloth cover 24. In this way, when the airbag body 11 is inflated, it breaks through the relatively thin part of the cloth cover 24 and extends to the outside of the seat body 2, which can prevent the human identification device 15 from breaking and splashing when the airbag body 11 is inflated, causing harm to the human body.

[0035] The working principle of the child car seat when in use is as follows:

[0036] The child car seat is installed on the car seat. During the driving of the car, if the actual acceleration value detected by the sensor device 12 during the driving of the car is less than the acceleration threshold value set in the controller 13, the controller 13 does not send a control signal, and the airbag body 11 remains in a contracted state; when the car collides, that is, the actual acceleration value detected by the sensor device 12 during the driving of the car is greater than the acceleration threshold value set in the controller 13, but the human body recognition device 15 sends an incorrect sitting posture signal, the controller 13 still does not send a control signal, and the airbag body 11 remains in a contracted state. When the car collides, that is, the actual acceleration value detected by the sensor device 12 during the driving process of the car is greater than the acceleration threshold value set in the controller 13, and the human body recognition device 15 sends a correct sitting posture signal, the controller 13 sends a control signal, which triggers the inflation device 14 to inflate the airbag body 11. The airbag body 11 is inflated, that is, it expands, rushes out of the receiving groove from the open end of the receiving groove and extends to the outside of the seat body to support the child's body, thereby reducing the impact force acting on the child's body, and avoiding or reducing the injury to the child's body.

[0037] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A child safety seat, comprising a seat body and an airbag device arranged on the seat body, the airbag device comprising an airbag body, the airbag body having a contracted state and an expanded state after being inflated, when the car is driving normally, the airbag body is in the contracted state and accommodated inside the seat body, the seat body is provided with an exit area for the airbag body to rush out of the seat body after being inflated, characterized in that: The safety airbag device further comprises a human body recognition device for recognizing a human body part, the human body recognition device is arranged at the exit area, or the human body recognition device is arranged in an area with the exit area as the center and a distance from the exit area as the radius, when the human body recognition device detects that there is a human body part within the exit area, the airbag body does not inflate, when the car collides and the human body recognition device detects that there is no human body part within the exit area, the airbag body inflates and rushes out of the interior of the seat body from the exit area; The seat body is provided with a receiving groove for receiving the airbag body in a contracted state, the exit area is an open end of the receiving groove, the seat body further comprises a cloth cover covering the open end, the human body identification device is arranged on the cloth cover, when the car collides and the human body identification device detects that there is no human body part within the exit area, the airbag body is inflated and expands to break through the cloth cover and extend to the outside of the seat body; The human body recognition device is wrapped in the cloth cover, and the thickness of the cloth cover where the human body recognition device is arranged is greater than the thickness of the remaining parts of the cloth cover; The safety airbag device also includes a sensor device for detecting a collision signal of a car, a controller and an inflation device for inflating the airbag body to expand the airbag body. The sensor device, the human body recognition device and the inflation device are all electrically connected to the controller, and the inflation device is connected to the airbag body.

2. The child safety seat according to claim 1, characterized in that: The human body recognition device has a sensing area, which includes the exit area and an area extending a distance from the exit area to the outside of the seat body along the expansion direction of the airbag body. When a human body part enters the sensing area, the human body recognition device sends an incorrect sitting posture signal. When no human body part enters the sensing area, the human body recognition device sends a correct sitting posture signal.

3. The child safety seat according to claim 1, characterized in that: The seat body includes a block for safety protection of children, the airbag body in a contracted state is arranged in the block, the exit area is located on the upper surface of the block, the human body recognition device is arranged on the upper surface of the block, and the inflated airbag body extends upward from the upper surface of the block and covers the upper surface of the block.

4. The child safety seat according to claim 1 or 3, characterized in that: The seat body includes a block for safety protection of children, the airbag body in a contracted state is arranged in the block, the exit area is located on the lower surface of the block, the human body recognition device is arranged on the lower surface of the block, and the inflated airbag body extends downward from the lower surface of the block and covers the lower surface of the block.

5. The child safety seat according to claim 1, characterized in that: The seat body is provided with two leg resting areas for the passengers to place their legs. The airbag body in the contracted state and the human body recognition device are both arranged in the seat body corresponding to the two leg resting areas. The exit area is located between the two leg resting areas. The inflated airbag body extends upward from between the two leg resting areas.

6. The child safety seat according to claim 5, characterized in that: A accommodating portion is arranged between the two leg rest areas on the seat body, and the accommodating portion extends upward from the intersection with the leg rest areas. The airbag body in a contracted state is arranged inside the accommodating portion, and the human body recognition device is arranged on the upper surface of the accommodating portion.

7. The child safety seat according to claim 1, characterized in that: The sensing device is used to detect the actual acceleration value during the driving of the vehicle. The controller is set with a threshold value of the acceleration during the driving of the vehicle. When the actual acceleration value is greater than or equal to the threshold value and the human body recognition device detects that there is no human body part within the exit area, the controller controls the inflation device to inflate the airbag body.

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