Safety air bag for automobile seat, automobile seat and automobile

Abstract

The invention belongs to the technical field of automobile passive safety, and discloses a safety air bag for an automobile seat, the automobile seat and an automobile, the safety air bag comprises a backrest supporting air bag and an air generator, the backrest supporting air bag comprises an air bag main body, and a spine avoiding part is vertically arranged in the middle of the air bag main body; the air bag body can be inflated and unfolded to form a big-end-up wedge-shaped structure with the side view effect, and the lower end of the air bag body is communicated with an air generator. The safety air bag is arranged in the automobile seat backrest, the collision sensor and the angle sensor detect the collision strength and the backrest inclination angle when collision occurs, the safety air bag is detonated when the collision strength and the backrest inclination angle both reach preset values, and the backrest supporting air bag pops up to support the back and the head and neck and is quickly pushed up to a safe sitting posture at the same time; the passenger is prevented from diving, the spine is prevented from being seriously injured due to the large-angle backward inclination sitting posture, and the head and neck whiplash injury and other injuries are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile passive safety, and in particular relates to a safety airbag for an automobile seat, an automobile seat and an automobile. Background Art

[0002] At present, large-angle seats are increasingly used in automobiles, providing passengers with a comfortable entertainment and resting posture. However, when the vehicle is in motion, the large-angle reclining sitting posture poses a great safety hazard to the passengers. When the vehicle collides, the large-angle reclining sitting posture is more likely to cause the passengers to dive. As we all know, the correct position of the seat belt is the shoulders, chest and hips of the passengers. The passenger dive refers to the abdominal belt of the seat belt slipping off the hip bone of the passenger during the collision, directly acting on the abdomen and internal organs, and the shoulder belt of the seat belt slipping off and directly acting on the neck and other parts of the passenger and causing injuries. Diving is a very dangerous movement posture in a vehicle collision accident. In addition, when the vehicle collides, the huge inertia will also cause the spine of the passenger to be subjected to additional compression and shearing forces. Excessive compression and shearing forces may cause serious damage to the spine. The huge inertia will cause the passenger to rush forward quickly, which may cause serious whiplash injuries to his neck. Traditional airbags cannot provide regular and effective safety protection for the passengers due to the sitting posture of the passengers.

[0003] Patent document CN220220667U discloses an airbag assembly, a seat assembly and a vehicle, wherein the airbag assembly includes an airbag, the airbag is connected to a frame, and the airbag has a notch at the front or rear end of the front-to-rear direction of the seat, the notch is located in the middle area of ​​the airbag along the left-right direction of the seat, and after the airbag is inflated, the height of the front end of the airbag along the front-to-rear direction of the seat is higher than the height of the rear end of the airbag along the front-to-rear direction of the seat. After the airbag is inflated, the height of the front end of the airbag along the front-to-rear direction of the seat is higher than the height of the rear end of the airbag along the front-to-rear direction of the seat, so that when the vehicle is in a collision due to working conditions, the height of the front end of the foam along the front-to-rear direction of the seat is higher than the height of the rear end of the foam along the front-to-rear direction of the seat, so that the thigh of the occupant is lifted higher than the buttocks, and the pelvic angle of the upper torso and lower torso of the occupant is reduced, thereby effectively preventing the occupant from sliding out of the seat. This patent document solves the problem of occupants diving in the event of a collision to a certain extent, but it cannot solve the problem that the occupants' spine may be seriously damaged due to additional squeezing and shearing forces due to their sitting posture. Conventional airbags are also difficult to play an effective protective role in a collision. Summary of the invention

[0004] The purpose of the present invention is to provide a safety airbag for a car seat, a car seat and a car. The safety airbag is installed in the backrest of the car seat. When a collision occurs, an angle sensor detects the tilt angle of the backrest, and a collision sensor detects the collision intensity. When the tilt angle and the collision intensity reach preset values, the safety airbag is controlled to be detonated, and the backrest supports the airbag to quickly deploy and pop out. The side view effect of the airbag body forms a wedge-shaped structure to support the back and the head and neck at the same time, and quickly push the occupant to a safe sitting position; a neck buffer support block is horizontally arranged on the upper part of the airbag body to play a buffering role, thereby reducing the damage to the neck caused by the impact force of the airbag popping out; the head embracing support part of the hood-shaped structure supports and protects the head, so that the head and neck are pushed up together with the back to restore the safe sitting position, and the head and neck are protected from being injured due to the rapid lifting of the back; the safety airbag of the present invention can prevent the occupant from diving, avoid the occupant's spine from being seriously damaged by additional squeezing force and shearing force due to the excessive backward tilt angle, protect the head and neck from being injured by whiplash, etc., and after the safe sitting position is restored, the conventional airbag can also play an effective protective role.

[0005] The specific contents of the plan are as follows:

[0006] A safety airbag for a car seat comprises a backrest support airbag and a gas generator. The backrest support airbag comprises an airbag body, a spine avoidance portion is vertically arranged in the middle of the airbag body, the airbag body can be inflated and expanded to form a wedge-shaped structure which is larger at the top and smaller at the bottom when viewed from the side, and the lower end of the airbag body is connected to the gas generator.

[0007] The airbag of the present invention is installed in the backrest of the car seat, and the backrest and the seat cushion of the car seat are rotatably connected. An angle sensor (such as a potentiometer installed on the side panel of the seat backrest, or a sensor installed on the angle adjuster) is arranged in the seat backrest to identify the tilt angle of the car seat backrest. When the backrest angle is ≤45°, the seat return function is shielded; when the backrest angle is greater than 45°, the seat return function is turned on, and the signal of the collision intensity transmitted by the collision sensor is combined to determine whether to detonate the airbag to return the occupant to a safe sitting position. When the vehicle collides, the angle sensor detects the tilt angle of the backrest, and the collision sensor detects the collision intensity. When the tilt angle of the backrest and the collision intensity both reach predetermined values, the control module sends an electrical signal to control the detonation of the gas generator of the airbag. The backrest support airbag of the airbag is arranged on the upper part of the backrest, and the gas generator is arranged on the lower part of the backrest, and the two are connected to each other. The backrest support airbag is flatly fixed and connected between the backrest and the foam. After inflation, the backrest is popped out of the front direction, i.e., the front direction. The inflation area of ​​the airbag body forms a wedge-shaped structure with a large top and a small bottom. When the backrest support airbag is not provided with a head-embracing support part, the top of the inflated airbag body is higher than the top of the car seat back, which plays a supporting role for the head and neck, and prevents the head and neck from being whiplashed and other serious injuries caused by the rapid push of the occupant's back by the airbag popping out. A closed spine avoidance part is vertically provided in the middle of the airbag body, and the spine avoidance part is an inverted U-shaped closed non-inflated area. After the gas generator is detonated, a large amount of gas is released instantly to quickly inflate the backrest support airbag, and the instantaneous impact force of the airbag body popping out is very amazing. Excessive impact force directly acting on the spine of the occupant is likely to cause serious damage to the spine. The provision of a spine avoidance part can prevent the spine from being damaged by the impact force of the airbag popping out, thereby ensuring the safety of the spine. The airbag body is surrounded by an inflation zone around a non-inflation zone, an air inlet is arranged at the lower end of the inflation zone, and the gas generator is provided with an air outlet. The air inlet of the airbag is connected with the air outlet of the gas generator to form a gas channel.

[0008] The backrest support airbag is also provided with a neck buffer support block, which is horizontally fixedly connected to the front surface of the upper part of the airbag body corresponding to the neck. The material of the neck buffer support block is a soft material with high buffering performance. The neck buffer support block of the present invention is selected from a density of ≤30kg / m 3 It is made of soft polyurethane foam plastic, which has good elastic recovery and good shock absorption performance. It is used to reduce the impact force of the airbag at the moment of popping out to reduce the damage to the lower part of the head and neck.

[0009] A head embracing support portion may also be provided on the top of the backrest supporting airbag, and a gas passage is provided between the lower end of the head embracing support portion and the top end of the airbag; when inflated, the gas passage of the head embracing support portion corresponding to the back of the occupant's head is vertical, and there is a small gap between the front surface of the head embracing support portion and the back of the head, so the head embracing support portion does not directly act on the back of the head at the moment of popping out, thereby avoiding a huge impact of the head on the head by the head embracing support portion, while at the same time it can play a supporting role for the head and neck, because its lower part is limitedly connected to the upper part of the airbag body, the airbag body extends forward and pops out, driving the head embracing support portion to move forward together, thereby ensuring that the head, neck and back move forward at the same time, avoiding whiplash or other injuries, and at the same time the hood-shaped structure can also play a conventional protective role for the head.

[0010] The present invention provides a continuous weakening line at the edge of the backrest cover except the connection line between the backrest and the seat cushion. After the gas generator receives the signal command from the control module and starts, the backrest support airbag expands outward rapidly, the backrest cover is expanded along the weakening line by the backrest support airbag, and the backrest support airbag quickly pops out of the cover, achieving the protective effect of the safety airbag of the present invention.

[0011] At present, the angle between the front surface of the fully inflated airbag body and the front surface of the seat back is between 20-30 degrees, and the occupant quickly returns to a safe sitting position. When implementing the present invention, the entire system needs to be calibrated, including the airbag detonation time, the specific volume of the airbag, the airbag deployment angle, etc., to maximize the safety of the occupants.

[0012] Furthermore, the rear end face of the airbag body is a fixed connection face, and the front end face of the airbag body expands and extends forward after inflation. The spine avoidance portion is an inverted U-shaped closed non-inflation area vertically arranged in the middle of the front end face and the rear end face of the airbag body. The area around the non-inflation area is the inflation area, and an air inlet is provided at the lower end of the inflation area and is connected to the gas generator.

[0013] The rear end face of the airbag body is fixedly connected to the backrest. When inflated, the front end face of the airbag body expands and extends forward and pops out of the backrest protective surface. A spine avoidance area is vertically arranged in the middle of the airbag body. The spine avoidance area is a closed area formed by sewing the front end face and the rear end face of the airbag body in the middle of the airbag body through sewing thread. This area is a non-inflatable area and gas cannot enter. The area around the non-inflatable area is the inflation area. The lower end of the inflation area is provided with an air inlet connected to the gas generator. After the gas generator is detonated, a large amount of gas is generated, which instantly flows into the inflation area. The front end face of the inflation area expands and extends forward, and the non-inflatable area forms an inner groove. The inner groove corresponds to the back spine area. The spine will not be affected by the impact force of the airbag body popping out, thus protecting the spine from serious injury.

[0014] Furthermore, the gas generator includes an air outlet and a bracket stud. The opening of the air outlet is arranged upward and connected to the air inlet at the lower end of the inflation area. The bracket stud is arranged on the gas generator for screwing and fixing the gas generator.

[0015] The gas outlet of the gas generator is used to communicate with the air inlet of the airbag inflation area. After the gas generator is detonated, a large amount of harmless gas is generated, which quickly enters the airbag and the head embrace support from the inflation port. The airbag and the head embrace support quickly expand and pop out of the car seat back cover, quickly pushing the occupant's back and head and neck forward to restore a safe sitting position. The purpose of setting the bracket stud is to fix the gas generator on the lower end of the car seat back frame by screwing the stud and nut.

[0016] Furthermore, the backrest support airbag also includes a neck buffer support block, which is horizontally arranged on the upper front surface of the airbag body, and the neck buffer support block is made of a soft material with high resilience and good buffering performance.

[0017] The neck buffer support block is horizontally arranged on the upper part of the airbag body corresponding to the neck area. The neck buffer support block is made of a soft material with high resilience and good buffering performance. The density of the present invention is ≤30kg / m 3 Made of soft polyurethane foam. Soft polyurethane foam mainly includes high-rebound foam, block sponge, slow-rebound foam and other products. It has very high rebound performance and is often used as shock-proof and buffering materials. When the backrest support airbag pops out, the neck buffer support block contacts the neck and lower back of the head of the occupant, which can play a good shock-absorbing and buffering role, avoiding serious injuries to the head and neck of the occupant caused by strong impact, and can support the neck and lower back of the head to move forward with the back, avoiding injuries such as whiplash.

[0018] Furthermore, the backrest support airbag also includes a head embracing support portion, the lower end of the head embracing support portion is connected to the upper end of the airbag body and forms a hood-shaped structure after being inflated, and the front surface of the head embracing support portion is matched and limitedly connected to the front surface of the airbag body.

[0019] The lower part of the head embracing support part is connected to the upper part of the airbag body, and after inflation, the head embracing support part forms a hood-shaped structure; the front surface of the lower part of the head embracing support part is connected to the corresponding front surface of the upper part of the airbag body. When the airbag body expands and extends forward, the head embracing support part also expands and extends forward due to the connection limit, thereby supporting the occupant's head. A small gap is maintained between the head embracing support part and the head of the present invention. At the moment when the airbag pops out, the head embracing support part does not directly act on the back of the head. When the airbag body pops out forward to push the occupant to stand up, the head embracing support part is driven forward by the airbag body to support the head, so that the head moves forward with the airbag body, which not only avoids the damage to the head caused by the airbag popping out, but also supports the head to avoid serious damage to the head and neck. In actual applications, the size of the head embracing support part and the position connected to the airbag body need to be calibrated in detail to meet safety needs.

[0020] A car seat comprises the safety airbag for the car seat, a backrest, a seat cushion and an angle sensor. The lower end of the backrest is rotatably connected to the rear end of the seat cushion. The angle sensor is arranged on the backrest, and the safety airbag for the car seat is arranged at the front of the backrest.

[0021] The airbag of the present invention is suitable for automobile seats that can be adjusted to tilt backward at a large angle. The backrest and the seat cushion are rotatably connected to adjust the tilt angle of the backrest. An angle sensor is provided on the backrest to detect the tilt angle of the backrest. When a vehicle collision occurs, an electrical signal is transmitted to the control module as one of the judgment bases for the control module to detonate the airbag. The airbag is arranged at the front of the backrest. When the detonation conditions are met, the gas generator detonates to generate a large amount of gas, which enters the backrest support airbag connected thereto, and instantly pushes the occupant's back and head and neck forward to restore a safe sitting position.

[0022] Furthermore, the backrest includes a backrest cover, a backrest frame and a backrest foam. The backrest cover is covered and connected to the backrest frame, the backrest foam is accommodated and connected between the backrest cover and the backrest frame, and the rear end face of the airbag body is fixedly connected between the backrest cover and the corresponding backrest foam.

[0023] The backrest cover is connected to the backrest frame, the backrest foam container is connected between the backrest cover and the backrest frame, and the rear end face of the airbag body is fixedly connected between the backrest cover and the corresponding backrest foam; after inflation, the front end of the airbag extends and expands toward the front of the vehicle and pops out of the backrest cover.

[0024] Furthermore, the backrest cover is provided with continuous weakening lines, which are arranged on the left side, the upper end and the right side circumferential edge of the front surface of the backrest cover.

[0025] The weakened line of the airbag is also called the tear line. As the name implies, the area along the weakened line is deliberately made weaker during design, so that it can be easily expanded by the explosion and extrusion of the airbag. The weakened line of the airbag is a special design, which is intended to ensure that the airbag can be deployed stably and controllably. The present invention provides a continuous weakened line from the left side to the upper end and the right side at the circumferential edge of the backrest cover of the automobile seat except for the connection between the backrest frame and the seat cushion frame, so that the area is relatively weak, so that the airbag can quickly and effectively break through these areas when inflated, thereby ensuring that the airbag can be stably deployed from the same position.

[0026] Furthermore, the angle sensor is fixedly connected inside the lower part of the backrest, and the gas generator is screwed and fixed to the lower end of the backrest frame through a bracket stud.

[0027] The angle sensor is fixedly connected to the lower part of the backrest, and can be a potentiometer installed on the side panel of the seat backrest, or a sensor installed on the angle adjuster, which can be selected according to actual needs. The gas generator is fixedly connected to the lower end of the backrest frame through the support studs and nuts.

[0028] A car comprises the car seat, a collision sensor and a control module, wherein a gas generator, an angle sensor and a collision sensor are electrically connected to the control module respectively, the collision sensor is fixedly connected to the front center of the car body, and the control module is arranged in the central control of the car.

[0029] The automobile of the present invention includes an automobile seat, a collision sensor and a control module, and a gas generator, a collision sensor and an angle sensor are electrically connected to the control module respectively; the collision sensor is arranged at the central position of the front part of the automobile body, and the installation positions of different automobile manufacturers and different models are different, such as the left and right fenders at the front part of the automobile body, the center of the front part of the automobile body, and the positions under the left and right headlight brackets. The number of installations and the installation position are selected according to actual needs. The control module is arranged in the central control of the automobile. When the vehicle collides, especially the front and rear collisions, the collision sensor detects the collision intensity and sends a signal to the control module, and the angle sensor detects the angle of the backrest tilting back and sends a signal to the control module. When the collision intensity and the tilting angle reach the preset value, the control module sends a signal to the gas generator of the airbag, and the gas generator is detonated to generate a large amount of gas and enter the backrest support airbag, which pops up forward instantly, pushing up the back and head and neck of the occupant together to restore the safe sitting posture. The neck buffer block provides buffering for the neck, and the hood structure of the head hugging support part protects and supports the head, reducing the damage to the head and neck.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention installs an airbag in the seat back. When a collision occurs, the detonation conditions are met, the gas generator is detonated, and the backrest supporting airbag expands and pops out rapidly. The airbag body forms a wedge-shaped structure with a larger upper part and a smaller lower part in a side view. The front end of the wedge-shaped structure is close to the back and head and neck of the occupant to push the occupant to quickly restore a safe sitting position, thereby preventing the occupant from diving due to the collision and avoiding the problem of serious damage to the spine due to the extra squeezing force and shearing force caused by the sitting position with too much backward leaning;

[0032] 2. The present invention provides an inverted U-shaped non-inflation area in the middle of the airbag body to avoid the spine of the occupant, thereby preventing the huge impact force when the airbag is ejected from causing serious damage to the spine;

[0033] 3. The neck buffer support block is arranged in the horizontal area above the inflation area of ​​the airbag body of the present invention. The neck buffer support block is made of soft polyurethane foam plastic, has high resilience and good shock absorption and buffering performance, and can reduce the impact force on the neck and lower back of the head of the occupant when the airbag pops out instantly, thereby reducing the damage to the lower neck;

[0034] 4. The head-embracing support part of the present invention forms a hood structure after being inflated. There is a small gap between the head and the back of the head. When it pops up, it does not directly act on the back of the head, thus avoiding the damage to the head caused by a huge impact force. In addition, because it is matched and connected with the upper limit of the airbag body, it moves forward as the airbag body extends and expands forward, thus supporting the head. The head, neck and back of the occupant can move forward quickly together to restore the normal sitting posture, and the head can also be protected in a conventional manner.

[0035] 5. After the safety airbag of the present invention quickly pushes the occupant to a safe sitting position, the existing conventional safety airbag can also play an effective protective role, further ensuring the safety of the occupant. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the safety airbag of the present invention when it is detonated;

[0037] Figure 2 It is a schematic diagram of the structure of the air bag body after being inflated;

[0038] Figure 3 It is a partial cross-sectional schematic diagram of the lower part of the backrest of the present invention;

[0039] Figure 4 It is a schematic diagram of the side position of the air bag of the present invention when it is inflated (without the neck buffer support block and the head embracing support part);

[0040] Figure 5 It is a schematic diagram of the side position of the air bag of the present invention when it is inflated (with a neck buffer support block);

[0041] Figure 6 It is a schematic diagram of the side position of the air bag of the present invention when it is inflated (with a neck buffer support block and a head embracing support portion);

[0042] Figure 7 It is an overall schematic diagram of the air bag of the present invention after it is inflated (with a neck buffer support block and a head embracing support portion).

[0043] In the figure:

[0044] 1. Airbag; 1.1. Airbag; 1.11 Airbag body; 1.12. Spine avoidance part; 1.13. Air inlet; 1.14 Neck buffer support block; 1.15. Head embrace support part; 1.2. Gas generator; 1.21. Air outlet; 1.22. Bracket stud; 1.3. Angle sensor; 1.4. Collision sensor; 1.5. Control module; 2. Car seat; 2.1. Backrest; 2.11. Backrest cover; 2.12. Backrest frame; 2.13. Weakened line; 2.2. Cushion. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0047] It should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "inside" and "outside" in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0048] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0049] The embodiments of the present invention, namely, an airbag for a car seat, a car seat and a car, are described below in combination with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 Provide detailed explanation.

[0050] Embodiment 1:

[0051] See Figure 1 and Figure 4 As shown, a safety airbag 1 for a car seat comprises a backrest supporting airbag 1.1 and a gas generator 1.2. The backrest supporting airbag 1.1 comprises an airbag body 1.11. A spine avoiding portion 1.12 is vertically arranged in the middle of the airbag body 1.11. The airbag body 1.11 can be inflated and expanded to form a wedge-shaped structure which is larger at the top and smaller at the bottom when viewed from the side. The lower end of the airbag body 1.11 is connected to the gas generator 1.2.

[0052] See Figure 2 As shown, the rear end face of the airbag body 1.11 is a fixed connection face, and the front end face of the airbag body 1.11 expands and extends forward after inflation, and the spine avoidance portion 1.12 is an inverted U-shaped closed non-inflation area vertically arranged in the middle of the front end face and the rear end face of the airbag body 1.11, and the area around the non-inflation area is the inflation area, and the lower end of the inflation area is provided with an air inlet 1.13 and is connected to the gas generator 1.2.

[0053] See Figure 3 As shown, the gas generator 1.2 includes an air outlet 1.21 and a bracket stud 1.22. The opening of the air outlet 1.21 is arranged upward and connected to the air inlet 1.13 at the lower end of the inflation area. The bracket stud 1.22 is arranged on the gas generator 1.2 for screwing and fixing the gas generator 1.2.

[0054] In this embodiment, the top end surface of the airbag main body 1.11 can be higher than the top end surface of the backrest 2.1 of the car seat 2 after inflation. The airbag main body 1.11 supports the head, neck and back of the occupant and moves forward quickly to a safe sitting position; the spine avoidance part 1.12 of the airbag main body 1.11 can avoid the spine and neck, reducing the damage to the spine and neck when the airbag pops out.

[0055] Example 2

[0056] See Figure 1 As shown, a safety airbag 1 for a car seat comprises a backrest supporting airbag 1.1 and a gas generator 1.2. The backrest supporting airbag 1.1 comprises an airbag body 1.11. A spine avoiding portion 1.12 is vertically arranged in the middle of the airbag body 1.11. The airbag body 1.11 can be inflated and expanded to form a wedge-shaped structure which is larger at the top and smaller at the bottom when viewed from the side. The lower end of the airbag body 1.11 is connected to the gas generator 1.2.

[0057] See Figure 2 As shown, the rear end face of the airbag body 1.11 is a fixed connection face, and the front end face of the airbag body 1.11 expands and extends forward after inflation, and the spine avoidance portion 1.12 is an inverted U-shaped closed non-inflation area vertically arranged in the middle of the front end face and the rear end face of the airbag body 1.11, and the area around the non-inflation area is the inflation area, and the lower end of the inflation area is provided with an air inlet 1.13 and is connected to the gas generator 1.2.

[0058] See Figure 3 As shown, the gas generator 1.2 includes an air outlet 1.21 and a bracket stud 1.22. The opening of the air outlet 1.21 is arranged upward and connected to the air inlet 1.13 at the lower end of the inflation area. The bracket stud 1.22 is arranged on the gas generator 1.2 for screwing and fixing the gas generator 1.2.

[0059] See Figure 5 As shown, the backrest support airbag 1.1 also includes a neck buffer support block 1.14, which is horizontally arranged on the upper front surface of the airbag body 1.11. The neck buffer support block 1.14 is made of a soft material with high resilience and good buffering performance.

[0060] In this embodiment, the top end surface of the airbag main body 1.11 can be higher than the top end surface of the backrest 2.1 of the car seat 2 after inflation. The top of the airbag main body 1.11 supports the head, and the airbag main body 1.11 supports the occupant's head, neck and back while moving forward quickly to a safe sitting position; a neck buffer support block 1.14 is provided on the upper part of the airbag main body 1.11 corresponding to the position of the occupant's neck and lower back of the head. The neck buffer support block 1.14 has high rebound and good buffering performance, which can buffer the impact force on the head and neck when the horizontal area of ​​the airbag main body pops out, thereby reducing damage to the neck and head.

[0061] Embodiment 3:

[0062] See Figure 1 As shown, a safety airbag 1 for a car seat comprises a backrest supporting airbag 1.1 and a gas generator 1.2. The backrest supporting airbag 1.1 comprises an airbag body 1.11. A spine avoiding portion 1.12 is vertically arranged in the middle of the airbag body 1.11. The airbag body 1.11 can be inflated and expanded to form a wedge-shaped structure which is larger at the top and smaller at the bottom when viewed from the side. The lower end of the airbag body 1.11 is connected to the gas generator 1.2.

[0063] See Figure 2As shown, the rear end face of the airbag body 1.11 is a fixed connection face, and the front end face of the airbag body 1.11 expands and extends forward after inflation, and the spine avoidance portion 1.12 is an inverted U-shaped closed non-inflation area vertically arranged in the middle of the front end face and the rear end face of the airbag body 1.11, and the area around the non-inflation area is the inflation area, and the lower end of the inflation area is provided with an air inlet 1.13 and is connected to the gas generator 1.2.

[0064] See Figure 3 As shown, the gas generator 1.2 includes an air outlet 1.21 and a bracket stud 1.22. The opening of the air outlet 1.21 is arranged upward and connected to the air inlet 1.13 at the lower end of the inflation area. The bracket stud 1.22 is arranged on the gas generator 1.2 for screwing and fixing the gas generator 1.2.

[0065] See Figure 6 and Figure 7 As shown, the backrest support airbag 1.1 also includes a neck buffer support block 1.14, which is horizontally arranged on the upper front surface of the airbag body 1.11. The neck buffer support block 1.14 is made of a soft material with high resilience and good buffering performance.

[0066] The backrest support airbag 1.1 also includes a head embracing support portion 1.15, the lower end of which is connected to the upper end of the airbag body 1.11 and forms a hood-shaped structure after being inflated, and the front surface of the head embracing support portion 1.15 is matched and limitedly connected to the front surface of the airbag body 1.11.

[0067] In this embodiment, the top end surface of the airbag main body 1.11 is higher than the top end surface of the backrest 2.1 of the car seat 2 after inflation, and is provided with a neck buffer support block 1.14 and a head encircling support portion 1.15. The neck buffer support block 1.14 buffers the impact force of the top horizontal area of ​​the airbag main body 1.11 on the neck and reduces the damage to the neck; the head encircling support portion 1.15 forms a hood structure after inflation, and the function of supporting the head is that there is a small gap between it and the back of the occupant's head, so the impact force during popping out will not cause serious damage to the head. Under the joint support of the airbag main body 1.11, the neck buffer support block 1.14 and the head encircling support portion 1.15, the occupant's back and head and neck can move forward together at the moment of collision, quickly restore the safe sitting posture, and minimize the damage to the occupant caused by the pop-up force of the airbag 1, so that it can truly protect the safety of the occupant.

[0068] Embodiment 4:

[0069] The present invention also provides a car seat 2, including the safety airbag 1 for the car seat, and also includes a backrest 2.1, a seat cushion 2.2 and an angle sensor 1.3. The lower end of the backrest 2.1 is rotatably connected to the rear end of the seat cushion 2.2, the angle sensor 1.3 is arranged on the backrest 2.1, and the safety airbag 1 for the car seat is arranged at the front part of the backrest 2.1.

[0070] The backrest 2.1 includes a backrest protective surface 2.11, a backrest frame 2.12 and a backrest foam. The backrest protective surface 2.11 is covered and connected to the backrest frame 2.12, the backrest foam is accommodated and connected between the backrest protective surface 2.11 and the backrest frame 2.12, and the rear end face of the airbag body 1.11 is fixedly connected between the backrest protective surface 2.11 and the corresponding backrest foam.

[0071] The backrest cover 2.11 is provided with a continuous weakening line 2.13, and the weakening line 2.13 is arranged on the left side, the upper end and the right side circumferential edge of the front surface of the backrest cover 2.11.

[0072] The angle sensor 1.3 is fixedly connected to the lower part of the backrest 2.1, and the gas generator 1.2 is screwed and fixed to the lower end of the backrest frame 2.12 through the bracket stud 1.22.

[0073] Embodiment 5:

[0074] The present invention also provides a car, comprising the car seat 2, a collision sensor 1.4 and a control module 1.5, wherein the gas generator 1.2, the angle sensor 1.3 and the collision sensor 1.4 are electrically connected to the control module 1.5 respectively, the collision sensor 1.4 is fixedly connected to the front center of the car body, and the control module 1.5 is arranged in the central control of the car.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety airbag for a car seat, characterized in that: The invention comprises a backrest support airbag (1.1) and a gas generator (1.2). The backrest support airbag (1.1) comprises an airbag body (1.11). A spine avoidance portion (1.12) is vertically arranged in the middle of the airbag body (1.11). The airbag body (1.11) can be inflated and expanded to form a wedge-shaped structure that is larger at the top and smaller at the bottom when viewed from the side. The lower end of the airbag body (1.11) is connected to the gas generator (1.2).

2. The safety airbag for a car seat according to claim 1, characterized in that: The rear end face of the airbag body (1.11) is a fixed connection face. After inflation, the front end face of the airbag body (1.11) expands and extends forward. The spine avoidance portion (1.12) is an inverted U-shaped closed non-inflation area vertically arranged in the middle of the front end face and the rear end face of the airbag body (1.11). The area around the non-inflation area is the inflation area. The lower end of the inflation area is provided with an air inlet (1.13) and is connected to the gas generator (1.2).

3. The safety airbag for a car seat according to claim 2, characterized in that: The gas generator (1.2) comprises an air outlet (1.21) and a bracket stud (1.22); the opening of the air outlet (1.21) is arranged upward and connected to the air inlet (1.13) at the lower end of the inflation area; the bracket stud (1.22) is arranged on the gas generator (1.2) and is used for screwing and fixing the gas generator (1.2).

4. The safety airbag for a car seat according to claim 3, characterized in that: The backrest support airbag (1.1) further comprises a neck buffer support block (1.14), which is horizontally arranged on the upper front surface of the airbag body (1.11), and the neck buffer support block (1.14) is made of a soft material with high resilience and good buffering performance.

5. The safety airbag for a vehicle seat according to claim 3 or 4, characterized in that: The backrest support airbag (1.1) further comprises a head-embracing support portion (1.15), the lower end of the head-embracing support portion (1.15) being connected to the upper end of the airbag body (1.11) and forming a hood-shaped structure after being inflated, and the front surface of the head-embracing support portion (1.15) being matched and limitedly connected to the front surface of the airbag body (1.11).

6. A car seat, characterized in that: It comprises a safety airbag for a car seat as claimed in any one of claims 1 to 5, and also comprises a backrest (2.1), a seat cushion (2.2) and an angle sensor (1.3), wherein the lower end of the backrest (2.1) is rotatably connected to the rear end of the seat cushion (2.2), the angle sensor (1.3) is arranged on the backrest (2.1), and the safety airbag for the car seat is arranged at the front part of the backrest (2.1).

7. The vehicle seat according to claim 6, characterized in that: The backrest (2.1) comprises a backrest protective surface (2.11), a backrest frame (2.12) and a backrest foam; the backrest protective surface (2.11) is covered and connected to the backrest frame (2.12); the backrest foam is accommodated and connected between the backrest protective surface (2.11) and the backrest frame (2.12); and the rear end face of the airbag body (1.11) is fixedly connected between the backrest protective surface (2.11) and the corresponding backrest foam.

8. The vehicle seat according to claim 7, characterized in that: The backrest protection surface (2.11) is provided with a continuous weakening line (2.13), and the weakening line (2.13) is arranged on the left side, the upper end and the right side circumferential edge of the front surface of the backrest protection surface (2.11).

9. The vehicle seat according to claim 8, characterized in that: The angle sensor (1.3) is fixedly connected inside the lower part of the backrest (2.1), and the gas generator (1.2) is screwed and fixed to the lower end of the backrest frame (2.12) via a bracket stud (1.22).

10. An automobile, characterized in that: The car seat comprises the car seat as claimed in claim 9, and also comprises a collision sensor (1.4) and a control module (1.5), wherein the gas generator (1.2), the angle sensor (1.3) and the collision sensor (1.4) are electrically connected to the control module (1.5) respectively, the collision sensor (1.4) is fixedly connected to the front center of the car body, and the control module (1.5) is arranged in the central control of the car.

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