Automobile co-driver leg safety air bag

Abstract

An automobile co-driver leg safety air bag is characterized in that an air bag arranged below an instrument desk forms an upper buffering bag body after being inflated and expanded, the upper buffering bag body extends along the curved surface of the instrument desk from front to back, the air bag further comprises a lower buffering bag body, and the lower buffering bag body is connected to the lower end of the upper buffering bag body and extends from front to back; and a V-shaped or U-shaped area for placing the feet of the co-driver is formed in the area between the upper buffering bag body and the lower buffering bag body. The air bag is divided into the upper buffering bag body and the lower buffering bag body, when limbs of a copilot passenger who lies flat almost move forwards due to a front collision accident, the upper buffering bag body protects the legs of the copilot passenger, and meanwhile the suspended feet of the copilot passenger can be placed in a V-shaped or U-shaped area between the upper buffering bag body and the lower buffering bag body. Good buffering protection can be provided for the feet of passengers in the up-down direction and the front-back direction, the feet are prevented from colliding with hard objects such as floors, and safety is improved.

Description

Technical Field

[0001] The utility model relates to an automobile airbag, in particular to a leg airbag for the co-pilot of an automobile. Background Art

[0002] With the increasing requirements of consumers for the comfort of automobiles, "zero-gravity" seats are widely used in automobiles, and are currently mainly applied to the co-pilot seats. The co-pilot can tilt the backrest backward by 45° or a larger angle as needed to achieve a nearly lying flat posture with the feet suspended. However, this ignores that in a frontal collision accident, the restraint effect of the seat belt on the co-pilot in the front-back direction is greatly reduced, the occupant's body will break free from the restraint of the seat belt, the trunk and lower limbs will move forward as a whole, and due to the limitation of the interior space of the vehicle, the legs are extremely easy to collide with the instrument panel, which will cause relatively serious injuries to the co-pilot.

[0003] The technical solution disclosed in the patent document named "Knee Airbag for Co-Pilot and Its Automobile" (document number CN1911711A, hereinafter referred to as Document 1) includes an airbag, a gas generator, a cover, and a housing. After the airbag is deployed, it can basically cover the part of the instrument panel that may cause knee injuries to the co-pilot occupant during a collision, protecting the occupant's knees and legs.

[0004] The technical solution disclosed in the patent document named "A Vehicle Airbag Device and the Electric Vehicle to Which It Is Applied" (document number CN110182162A, hereinafter referred to as Document 2) includes a sensor, a processor airbag assembly. The airbag assembly includes an airbag and a gas generator. The airbag assembly is arranged in the instrument panel. The gas generator is used to inflate the airbag, and the inflated airbag is used to block the movement of the occupant's legs. A recess is provided at the position where the lower end of the airbag abuts against the floor for blocking the movement of the occupant's feet.

[0005] In the above technical solutions, although the airbag can provide effective collision protection for the legs and knees of the co-pilot member, for a nearly flat seat, the overall forward movement distance of the co-pilot's entire trunk and lower limbs is larger than that of a normal seat. In a frontal collision accident of an automobile, in the nearly lying flat posture of the co-pilot member, the suspended feet are likely to directly collide with the front floor of the automobile or the position where the front end of the front floor is connected to the instrument panel due to excessive forward movement of the limbs, thus causing injuries to the co-pilot's feet. Although a recess is provided on the airbag in Document 2 for blocking the movement of the occupant's feet, the airbag disclosed in Document 2 is not suitable for protecting the suspended feet of the occupant in a nearly flat seat. The suspended feet will interfere with the inflated airbag, and on the contrary, it is easy to cause more serious injuries to the occupant's feet due to the impact force generated by the instantaneous inflation of the airbag. Summary of the Invention

[0006] The utility model provides a leg airbag for the co-pilot of an automobile, which provides effective collision protection for the legs and feet of the co-pilot member on a nearly flat seat during a frontal collision accident.

[0007] In order to achieve the above object, the technical solution adopted is: a leg airbag for the co-pilot of an automobile. After the airbag arranged under the instrument panel is inflated, an upper buffer capsule body is formed. The upper buffer capsule body extends from front to back and follows the curve of the instrument panel. The airbag further includes a lower buffer capsule body. The lower buffer capsule body is connected to the lower end of the upper buffer capsule body. The lower buffer capsule body extends from front to back. The area between the upper buffer capsule body and the lower buffer capsule body forms a V-shaped or U-shaped area for the feet of the co-pilot to be placed in.

[0008] Compared with the prior art, the technical effect of the utility model is that the airbag is divided into an upper buffer capsule body and a lower buffer capsule body. When a frontal collision accident occurs and the limbs of the nearly lying co-pilot move forward, while the upper buffer capsule body protects the legs of the co-pilot, the suspended feet of the co-pilot can be placed in the V-shaped or U-shaped area between the upper buffer capsule body and the lower buffer capsule body, which can provide good buffer protection for the feet of the occupant in the up-down and front-back directions, avoid the feet from bumping against hard objects such as the floor, and improve safety. Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the relative position between the inflated airbag of the utility model and the co-pilot;

[0010] Figure 2 It is a schematic diagram of the inflated state of the airbag;

[0011] Figure 3 It is a schematic diagram of the control system of the airbag generator of the utility model. Detailed Embodiment

[0012] The following will further describe the present utility model in detail in conjunction with the attached Figures 1-3 drawings and related content:

[0013] A leg airbag for the co-pilot of an automobile. The airbag 10 arranged under the instrument panel A1 forms an upper buffer capsule body 11 after being inflated. The upper buffer capsule body 11 extends from front to back and follows the curve of the instrument panel A1. The airbag 10 further includes a lower buffer capsule body 12. The lower buffer capsule body 12 is connected to the lower end of the upper buffer capsule body 11. The lower buffer capsule body 12 extends from front to back. The area between the upper buffer capsule body 11 and the lower buffer capsule body 12 forms a V-shaped or U-shaped area B for the feet of the co-pilot to be placed in.

[0014] In the above scheme, the airbag 10 is divided into upper and lower buffer bags 11 and 12. When a frontal collision occurs and causes the limbs of the almost lying front passenger to move forward, the upper buffer bag 11 protects the front passenger's legs while the suspended feet can be placed in the V-shaped or U-shaped area B between the upper buffer bag 11 and the lower buffer bag 12, which can provide good buffering protection for the feet of the occupant in the up and down and front and back directions, avoid the feet from colliding with hard objects such as the front floor A2, and improve safety.

[0015] Furthermore, after the airbag 10 is inflated, its outer surface is spaced apart from the legs and feet of the front passenger. In this solution, considering that the airbag 10 can be inflated instantly, when the airbag 10 is inflated to a full state and the front passenger's limbs have not moved forward significantly, the upper and lower buffer capsules 11, 12 are still spaced apart from the front passenger's suspended legs and feet (including the instep, sole and toes), in order to prevent the impact force generated by the instantaneous expansion of the airbag 10 from directly acting on the front passenger's legs and feet and causing damage to the front passenger's limbs.

[0016] As a preferred embodiment, the lower buffer bag 12 extends from front to rear along the front floor A2, so that the inflated airbag 10 can provide a larger V-shaped or U-shaped area B for the front passenger's feet to be placed in, thereby avoiding interference between the inflated airbag 10 and the front passenger's feet and affecting normal protection.

[0017] As a preferred solution, the lower cushioning bladder 12 and the upper cushioning bladder 11 are connected to each other to form a conjoined structure. The upper and lower cushioning bladders 11, 12 can be inflated at the same time and quickly deployed to protect the legs and feet of the co-pilot occupant.

[0018] Combination Figure 1 , 3 As shown, in the present application, the airbag controller 30 receives the collision signal sent by the collision sensor 40 to drive the airbag inflator 50 to inflate the airbag 10. It should be noted that, considering that the side collision or rear-end collision of the vehicle body will not cause the front passenger's limbs to move forward, in this solution, the collision sensor 40 is preferably a sensor for detecting the frontal collision of the vehicle head, and can also be a sensor for detecting the left front and right front of the vehicle head. When the collision reaches a certain intensity, the collision sensor 40 outputs a collision signal to the airbag controller 30 to control the airbag inflator 50 to inflate the airbag 10.

[0019] Further, considering that when the co-driver is in a normal sitting posture, the seat belt can provide good restraint to the co-driver in the front-back direction, and the lower limbs of the co-driver will not move significantly forward. Only when the co-driver seat is overly tilted, the seat belt will lose its effective restraint effect. Therefore, in this application, a travel proximity switch is provided on the angular rotation path of the backrest C1 of the co-driver seat. The travel proximity switch is connected in series with the control circuit of the airbag controller 30. When the angle of the backrest C1 of the co-driver seat is tilted to a certain extent, the travel proximity switch is turned on, thereby making the control circuit of the airbag controller 30 conductive. After the collision sensor 40 sends a collision signal, the airbag controller 30 can then drive the airbag generator 50 to inflate the airbag 10.

[0020] Taking whether the travel proximity switch is turned on as a prerequisite, it is determined whether the circuit of the airbag controller 30 is turned on. Only when the backrest C1 is overly tilted and the travel proximity switch is turned on, can the airbag controller 30 be powered on and used. In this way, when the co-driver is in a normal sitting posture, the seat belt can provide sufficient restraint force to prevent the co-driver's limbs from moving forward excessively, and the airbag 10 will not be used, avoiding the ineffective use of the airbag 10 and increasing the cost of later maintenance and repair.

[0021] In addition, as shown in Figure 3 In this solution, the airbag controller 30 can also be controlled by the cooperation of an angle sensor and a controller, that is: the co-driver seat angle sensor communicatively connected to the vehicle controller 20 outputs the included angle value between the backrest C1 and the seat C2. After the airbag controller 30 receives the control instruction sent by the vehicle controller 20 when the received included angle value is greater than or equal to 45°, it drives the airbag generator 50 to inflate the airbag 10. Taking whether the angle of the backrest C1 reaches 45° as a prerequisite, it is determined whether the airbag controller 30 needs to drive the airbag generator 50 to inflate the airbag 10.

Claims

1. A passenger leg safety airbag for a car, wherein an airbag (10) arranged below an instrument panel (A1) is inflated to form an upper buffer bladder body (11), and the upper buffer bladder body (11) extends from front to rear along the curved surface of the instrument panel (A1), characterized in that: The airbag (10) further comprises a lower cushioning sac (12), which is connected to the lower end of the upper cushioning sac (11), and extends from front to rear, and the area between the upper cushioning sac (11) and the lower cushioning sac (12) forms a V-shaped or U-shaped area (B) for the front passenger's feet to be placed.

2. The automobile passenger leg airbag according to claim 1, characterized in that: After the air bag (10) is inflated, its outer surface is spaced apart from the legs and feet of the co-driver.

3. The automobile passenger leg airbag according to claim 1, characterized in that: The lower buffer bag (12) extends from front to rear along the front floor (A2).

4. The automobile passenger leg airbag according to claim 1, 2 or 3, characterized in that: The interiors of the lower buffer sac (12) and the upper buffer sac (11) are connected to each other to form a connected structure.

5. The automobile passenger leg airbag according to claim 1, characterized in that: The airbag controller (30) receives a collision signal sent by the collision sensor (40) and drives the airbag generator (50) to inflate the airbag (10).

6. The automobile passenger leg airbag according to claim 5, characterized in that: A travel proximity switch is provided on the angular rotation path of the seat back (C1) of the passenger seat, and the travel proximity switch is connected in series with the control circuit of the airbag controller (30).

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