Steering wheel safety air bag with continuous constant-temperature heating function

Abstract

The invention relates to the field of automobile safety air bags, and provides a steering wheel safety air bag capable of continuously heating at constant temperature, a constant-temperature air bag heating pad is arranged between an injection molding base material and a coating decorative cover, the constant-temperature air bag heating pad is composed of base cloth and resistance wires, and the constant-temperature air bag heating pad and an injection molding cover plate are completely the same in shape; the constant-temperature air bag heating pad is provided with a tearing line structure to avoid influence on air bag explosion, the constant-temperature air bag heating pad supplies power through a temperature control ECU (electronic control unit), an NTC (negative temperature coefficient) and a pin connected with a clock spring 6H and a clock spring 12H, so that the NTC senses temperature change, and the temperature control ECU starts the constant-temperature air bag heating pad to heat or stop heating according to the temperature change to ensure constant temperature; and when the temperature is lower than 32 DEG C, the temperature control ECU controls the constant-temperature air bag heating pad to heat, and when the temperature is higher than 40 DEG C, the temperature control ECU controls the constant-temperature air bag heating pad to stop heating, so that the effect of continuously keeping the air bag decorative cover at the constant temperature of 36 + / -4 DEG C is finally achieved, and the purpose of excellent hand touch experience of a driver is achieved.

Description

Technical Field

[0001] This invention relates to the field of automotive airbags, and more particularly to a steering wheel airbag with continuous constant temperature heating. Background Technology

[0002] An airbag system is an auxiliary safety system in automobiles. Its working principle is that when sensors detect a relevant collision signal, the control unit determines whether to deploy the airbag. Upon receiving the deployment signal, the gas generator produces a large amount of gas in a short time to inflate the airbag, forming a cushion to protect passengers from secondary collisions. The driver's side airbag protects the driver's head, neck, and chest from injury.

[0003] The driver's airbag is an indispensable and crucial component of the airbag system. Its main components include a cover, housing, inflator, and airbag. The airbag needs to deploy smoothly after emerging from the cover to fully protect the driver. Considering cold-weather operating conditions, especially for export to regions like Russia, the driver's airbag is equipped with a heating function. Simultaneously, ensuring proper deployment performance is paramount, playing a vital role in the overall quality of the driver's airbag.

[0004] Currently, steering wheel heating technology is relatively stable and is already equipped in higher-end models. However, drivers frequently need to press the horn and touch the driver's side cover while driving, and the cold touch creates a poor user experience. Conventional airbag cover designs lack sensory evaluation and customer experience considerations, serving only as functional components; the airbag simply needs to deploy smoothly from the tear line of the cover without improving the tactile quality. Therefore, a steering wheel airbag with continuous constant temperature heating is needed. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a steering wheel airbag with continuous constant temperature heating, which solves the problems in the background art.

[0006] To achieve the above objectives, the present invention provides a steering wheel airbag with continuous constant temperature heating, comprising an airbag body, the airbag body including an airbag housing, an injection-molded cover plate mounted on one side of the airbag housing, a covering cover disposed on the side of the cover plate away from the airbag housing, a constant temperature airbag heating pad disposed between the injection-molded base material and the covering cover, the constant temperature airbag heating pad including a base fabric, resistance wires distributed on the base fabric, and tear lines disposed on the surface of the base fabric; The constant temperature airbag heating pad is electrically connected to a temperature control ECU. The temperature control ECU provides power and NTC to the constant temperature airbag heating pad. The temperature control ECU is located inside the steering wheel. The constant temperature airbag heating pad and the temperature control ECU are connected through four wire harnesses. The temperature control ECU is connected to the pins of clock spring 6H and clock spring 12H respectively to meet the power supply requirements.

[0007] Preferably, the four wire harnesses are the positive power supply wire harness, the negative power supply wire harness, the NTC+ wire harness, and the NTC- wire harness.

[0008] Preferably, the NTC identification signal is transmitted to the temperature control ECU in the form of a resistance value.

[0009] Preferably, the clock spring 6H carries a large current, and the clock spring 12H carries a small current.

[0010] Preferably, the NTC identification signal is converted into temperature data. When the temperature is less than 32°C, the temperature control ECU controls the constant temperature airbag heating pad to heat up. When the temperature is greater than 40°C, the temperature control ECU controls the constant temperature airbag heating pad to stop heating up.

[0011] Preferably, the cover plate, the decorative cover, and the constant temperature airbag heating pad have the same shape.

[0012] Preferably, an airbag is installed inside the airbag housing, the airbag is fixed inside the airbag housing by a bolt assembly, a spring is provided between the airbag and the side wall of the airbag housing away from the cover plate, and a gas generator is provided on the airbag.

[0013] Preferably, the constant temperature airbag heating pad is 1 mm thick and is adhered to the surface of the cover plate.

[0014] The beneficial effects of this invention are as follows: This invention places a constant-temperature airbag heating pad between the injection-molded substrate and the covering cover. The constant-temperature airbag heating pad is composed of a base fabric and resistance wire. The shape of the constant-temperature airbag heating pad is exactly the same as that of the injection-molded cover plate, and it has a tear line structure to avoid affecting the airbag deployment. The constant-temperature airbag heating pad is powered by a temperature control ECU and an NTC, and is powered by the pins of clock springs 6H and 12H. In this way, the NTC senses temperature changes, and the temperature control ECU starts or stops the constant-temperature airbag heating pad according to the temperature changes to ensure constant temperature. When the temperature is below 32°C, the temperature control ECU controls the constant-temperature airbag heating pad to heat; when the temperature is above 40°C, the temperature control ECU controls the constant-temperature airbag heating pad to stop heating. Ultimately, a continuous constant temperature of 36±4°C is achieved for the airbag cover, resulting in an excellent tactile experience for the driver. Clock springs 6H and 12H are provided for different application scenarios. Clock spring 6H is suitable for equipment with limited rotation angles, while clock spring 12H is typically used for high-precision equipment with multiple continuous rotations. The constant temperature airbag heating pad cover, the decorative cover, and the constant temperature airbag heating pad are all the same shape, ensuring high compatibility. Furthermore, the constant temperature airbag heating pad is only 1mm thick, so it does not affect the overall performance. An airbag is installed inside the airbag housing. The airbag is inflated and detonated by a gas generator. The airbag is attached to the airbag housing by a spring, ensuring cushioning and preventing damage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of the invention; Figure 2 This is a schematic diagram of the constant temperature airbag heating pad of the present invention; Figure 3 This is the electrical schematic diagram of the present invention.

[0017] The diagram is marked as follows: 1-Airbag housing, 2-Lid plate, 3-Covering cover, 4-Constant temperature airbag heating pad, 5-Airbag, 6-Spring, 7-Gas generator, 8-Tear line, 9-Resistance wire. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 3As shown, a steering wheel airbag with continuous constant temperature heating includes an airbag body, which includes an airbag housing 1. A molded cover plate 2 is fitted on one side of the airbag housing 1, and a covering cover 3 is provided on the side of the cover plate 2 away from the airbag housing 1. A constant temperature airbag heating pad 4 is provided between the injection molded base material 2 and the covering cover 3. The constant temperature airbag heating pad 4 includes a base fabric with resistance wires 9 distributed on it, and tear lines 8 are provided on the surface of the base fabric. By providing the constant temperature airbag heating pad 4 between the injection molded base material 2 and the covering cover 3, the constant temperature airbag heating pad 4 is composed of a base fabric and resistance wires 9. The constant temperature airbag heating pad 4 has the same shape as the injection molded cover plate and has a tear line 8 structure to avoid affecting the airbag deployment.

[0021] The constant temperature airbag heating pad 4 is electrically connected to a temperature control ECU. The temperature control ECU provides power and an NTC to the constant temperature airbag heating pad 4. The NTC identification signal is transmitted to the temperature control ECU in the form of a resistance value. The temperature control ECU is located inside the steering wheel. The constant temperature airbag heating pad 4 and the temperature control ECU are connected by four wire harnesses, namely the positive power supply wire harness, the negative power supply wire harness, the NTC+ wire harness, and the NTC- wire harness. The temperature control ECU is connected to the pins of the clock spring 6H and the clock spring 12H respectively to meet the power supply requirements. The clock spring 6H carries a large current, and the clock spring 12H carries a small current. The NTC recognition signal is converted into temperature data. When the temperature is below 32℃, the temperature control ECU controls the constant temperature airbag heating pad 4 to heat up; when the temperature is above 40℃, the temperature control ECU controls the constant temperature airbag heating pad 4 to stop heating. The constant temperature airbag heating pad 4 is powered by the temperature control ECU and the NTC, and is connected to the pins of clock springs 6H and 12H for power supply. In this way, the temperature control ECU senses temperature changes and starts or stops the constant temperature airbag heating pad 4 to maintain a constant temperature. When the temperature is below 32℃, the temperature control ECU controls the constant temperature airbag heating pad 4 to heat up; when the temperature is above 40℃, the temperature control ECU controls the constant temperature airbag heating pad 4 to stop heating, ultimately achieving a continuous constant temperature of 36±4℃ for the airbag cover, providing an excellent tactile experience for the driver. Clock springs 6H and 12H are provided for different usage scenarios. Clock spring 6H is suitable for equipment with limited rotation angles, while clock spring 12H is typically used for high-precision equipment with multiple continuous rotations. The cover plate 2, the decorative cover 3, and the constant temperature airbag heating pad 4 are identical in shape. The constant temperature airbag heating pad 4 is 1mm thick and is adhered to the surface of the cover plate 2. This ensures high compatibility, and the 1mm thickness of the constant temperature airbag heating pad 4 does not affect the overall performance. An airbag 5 is installed inside the airbag housing 1. The airbag 5 is fixed inside the airbag housing 1 by bolts. A spring 6 is installed between the airbag 5 and the side wall of the airbag housing 1 away from the cover plate 2. A gas generator 7 is installed on the airbag 5. The airbag 5 is inflated and detonated by gas generated by the gas generator 7. The airbag 5 is attached to the airbag housing 1 by the spring 6 to ensure that it is cushioned and not easily damaged.

[0022] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and many other variations of different aspects of the invention as described above exist, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A steering wheel airbag with continuous constant temperature heating, comprising an airbag body, characterized in that, The airbag body includes an airbag box (1), an injection-molded cover plate (2) is fitted on one side of the airbag box (1), a covering cover (3) is provided on the side of the cover plate (2) away from the airbag box (1), a constant temperature airbag heating pad (4) is provided between the injection-molded base material (2) and the covering cover (3), the constant temperature airbag heating pad (4) includes a base fabric, resistance wires (9) are distributed on the base fabric, and tear lines (8) are provided on the surface of the base fabric; The constant temperature airbag heating pad (4) is electrically connected to the temperature control ECU. The temperature control ECU provides power and NTC to the constant temperature airbag heating pad (4). The temperature control ECU is located inside the steering wheel. The constant temperature airbag heating pad (4) and the temperature control ECU are connected through four wire harnesses. The temperature control ECU is connected to the pins of the clock spring 6H and the clock spring 12H respectively to meet the power supply requirements.

2. The steering wheel airbag with continuous constant temperature heating according to claim 1, characterized in that, The four wire harnesses are the positive power supply wire harness, the negative power supply wire harness, the NTC+ wire harness, and the NTC- wire harness.

3. The steering wheel airbag with continuous constant temperature heating according to claim 2, characterized in that, The NTC identification signal is transmitted to the temperature control ECU in the form of a resistance value.

4. The steering wheel airbag with continuous constant temperature heating according to claim 3, characterized in that, The clock spring 6H carries a large current, and the clock spring 12H carries a small current.

5. A steering wheel airbag with continuous constant temperature heating according to claim 4, characterized in that, The NTC identification signal is converted into temperature data. When the temperature is less than 32°C, the temperature control ECU controls the constant temperature airbag heating pad (4) to heat. When the temperature is greater than 40°C, the temperature control ECU controls the constant temperature airbag heating pad (4) to stop heating.

6. The steering wheel airbag with continuous constant temperature heating according to claim 1, characterized in that, The cover plate (2), the covering cover (3), and the constant temperature airbag heating pad (4) have the same shape.

7. The steering wheel airbag with continuous constant temperature heating according to claim 1, characterized in that, An airbag (5) is installed inside the airbag box (1). The airbag (5) is fixed inside the airbag box (1) by a bolt assembly. A spring (6) is provided between the airbag (5) and the side wall of the airbag box (1) away from the cover plate (2). A gas generator (7) is provided on the airbag (5).

8. A steering wheel airbag with continuous constant temperature heating according to claim 6, characterized in that, The constant temperature airbag heating pad (4) is 1 mm thick and is attached to the surface of the cover plate (2).

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