Vibration reduction safety air bag box body for driver

Abstract

The invention relates to the technical field of automobile safety air bags, in particular to a vibration reduction driver safety air bag box which comprises a box body and an air bag module, the air bag module is installed on the box body, a plurality of sets of guide holes are formed in the box body, guide columns are movably installed in the guide holes, and vibration reduction mechanisms are arranged between the guide columns and the guide holes. The vibration of the box body is reduced through the vibration reduction mechanism, the box body is provided with the compensation mechanism, and the vibration reduction mechanism is elastically compensated through the compensation mechanism; a conducting strip pressing plate is installed in the box body, copper contacts corresponding to the guide columns are arranged on the conducting strip pressing plate, the guide columns and the copper contacts serve as a negative electrode contact and a positive electrode contact of the loudspeaker respectively, the positive electrode and the negative electrode of the loudspeaker are of the guide column and copper contact structure respectively, and the copper contacts are communicated through the conducting strip pressing plate. Therefore, the guide post is contacted and communicated with the copper contact, the conduction of a circuit is realized, the structure is simple, and the installation is convenient.

Description

Technical Field

[0001] This invention relates to the field of automotive airbag technology, and more particularly to a vibration-damping driver's airbag housing. Background Technology

[0002] The driver's airbag assembly is mounted on the steering wheel via hooks, spring clips, and other structures. In the event of a collision, the airbag deploys to form a buffer pad, protecting the driver and reducing the severity of injury. Typically, the driver's airbag assembly also needs to function as a horn and conduct electricity. This function requires a floating connection between the driver's airbag and the steering wheel. If there is a gap between the driver's airbag assembly and the steering wheel, vibrations from the road surface and powertrain will be transmitted to the steering wheel, causing steering wheel vibration and abnormal noises when the driver's airbag impacts the steering wheel.

[0003] Existing vibration damping designs typically involve adding a mass damper to the steering wheel or using the airbag inflator as a buffer. Some models integrate the driver's airbag guide column into the buffer, but these methods are complex, costly, and difficult to standardize. Furthermore, existing horn circuit structures typically involve installing separate horn reeds and contact points, with each contact point connected by wires, resulting in a complex and inconvenient structure. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a vibration-damping driver's airbag housing to solve the problems of complex circuit conduction structure and inconvenient installation in existing systems.

[0005] To achieve the above objectives, the present invention provides a vibration-damping driver's airbag housing, comprising a housing body and an airbag module. The airbag module is mounted on the housing body. The housing body has multiple sets of guide holes, each containing a guide post. A vibration-damping mechanism is provided between the guide posts and the guide holes to reduce the vibration of the housing body. The housing body is also equipped with a compensation mechanism to provide elastic compensation for the vibration-damping mechanism. A conductive sheet pressure plate is installed inside the housing body. Copper contacts are provided on the conductive sheet pressure plate corresponding to the guide posts. The guide posts and copper contacts serve as the negative and positive contacts of the horn, respectively.

[0006] A further improvement is that the guide post is made of metal.

[0007] A further improvement is that the vibration damping mechanism includes a guide sleeve and a vibration damping sleeve sleeved on the guide post. The vibration damping sleeve is engaged inside the guide hole and sleeved outside the guide sleeve. A guide seat is installed on the upper end of the guide sleeve, and a spring is sleeved on the guide post. The spring is located between the guide seat and the guide sleeve.

[0008] A further improvement is that the compensation mechanism includes a first metal sheet and a second metal sheet, which are fitted together and fixed to the inner wall of the box body. The first metal sheet is in contact with the end of the guide post, and the second metal sheet is in contact with the vibration damping sleeve.

[0009] A further improvement is that the guide sleeve has claws on both sides of its end, which pass through the inside of the damping sleeve and engage with the first metal plate.

[0010] A further improvement is that the box body is made of plastic injection molding.

[0011] A further improvement is that a mounting groove is provided on one side of the surface of the box body.

[0012] The beneficial effects of this invention are as follows: The housing body is made of injection molded parts, which increases the contact surface for vibration damping installation, allowing the vibration damping sleeve to be directly snapped onto the housing body. This reduces the outer shell parts used to support the vibration damping sleeve, lowers development costs, and saves production time. By snapping the vibration damping sleeve into the guide hole, the guide post is guided to reduce vibration, improving the stability of the housing. A compensation mechanism is set up, which is a bimetallic strip structure composed of a first metal sheet and a second metal sheet. When the temperature changes, the bimetallic strip will expand due to the temperature change, and the force generated will be superimposed on the force of the vibration damping sleeve, compensating for the force on the vibration damping sleeve. This allows the vibration damping sleeve to stably dampen vibrations after temperature changes, improving the stability of the vibration damping sleeve. The positive and negative poles of the horn adopt guide post and copper contact structure respectively. The copper contacts are connected through a conductive sheet pressure plate. As the airbag moves up and down, the guide post and the copper contact make contact and connect, realizing the circuit conduction. This reduces the setting of spring sheets and the mold development of insert injection molded parts, and eliminates the circuit connection wires between the three guide posts, making the structure simpler and easier to assemble. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the box body structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the conductive sheet pressure plate structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the guide post according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the bimetallic sheet structure according to an embodiment of the present invention; Figure 5This is a schematic diagram of the inner structure of the box body according to an embodiment of the present invention.

[0015] The diagram is marked as follows: 1. Box body; 2. Airbag module; 3. Guide hole; 4. Guide post; 5. Conductive sheet pressure plate; 6. Copper contact; 7. Guide sleeve; 8. Vibration damping sleeve; 9. First metal sheet; 10. Second metal sheet; 11. Claw; 12. Guide seat; 13. Spring; 14. Mounting slot. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] like Figure 1-5 As shown, this embodiment provides a vibration-damping driver safety airbag housing, including a housing body 1 and an airbag module 2. The airbag module 2 is installed on the housing body 1. The housing is integrally injection molded from plastic material. An installation groove 14 is provided on one side of the surface of the housing body 1. The installation groove 14 is used to install a pin puller to meet the functional requirements of multi-stage airbag deployment.

[0019] The box body has multiple sets of guide holes 3, and guide posts 4 are movably installed in each guide hole 3. A vibration damping mechanism is set between the guide posts 4 and the guide holes 3 to reduce the vibration of the box body 1. The vibration damping mechanism includes a guide sleeve 7 and a damping sleeve 8 sleeved on the guide posts 4. The damping sleeve 8 uses a silicone damping element and has a groove on its outer side. The damping sleeve 8 is engaged with the inner side of the guide hole 3 through the groove. The damping sleeve 8 is sleeved on the outer side of the guide sleeve 7, and the guide sleeve 7 is movably sleeved on the outer side of the guide post 4. The damping sleeve 8 dampens vibration in multiple directions, reducing steering wheel vibration and abnormal noise. A guide seat 12 is installed on the upper end of the guide sleeve 7, and a spring 13 is sleeved on the guide post 4. The spring 13 is located between the guide seat 12 and the guide sleeve 7, and pushes the compressed guide post 4 back to its original position.

[0020] A conductive sheet pressure plate 5 is installed inside the box body 1. Both the conductive sheet pressure plate 5 and the guide post 4 are made of metal. The airbag module 2 and the conductive sheet pressure plate 5 are installed inside the box body 1 by bolts. Copper contacts 6 are riveted to the conductive sheet pressure plate 5 corresponding to the guide post 4. The copper contacts 6 are connected to each other through the conductive sheet pressure plate 5, reducing the use of wires. The conductive sheet pressure plate 5 leads out a connector to connect to the speaker wiring harness. The guide post 4 and the copper contacts 6 serve as the negative and positive contacts of the speaker, respectively. By pressing, the end of the guide post 4 contacts the copper contacts 6, realizing circuit conduction.

[0021] The housing body 1 is equipped with a compensation mechanism to elastically compensate for the vibration damping mechanism. The compensation mechanism includes a first metal sheet 9 and a second metal sheet 10, which are bonded together to form a bimetallic strip. The first metal sheet 9 and the second metal sheet 10 are made of two metals with different coefficients of thermal expansion. The first metal sheet 9 can be made of Invar alloy, and the second metal sheet 10 can be made of nickel-chromium alloy. The first metal sheet 9 and the second metal sheet 10 are fixed to the inner wall of the housing body 1, which can be achieved by riveting. The first metal sheet 9 contacts the end of the guide post 4, and the second metal sheet 10 contacts the vibration damping sleeve 8. Temperature rise... When the temperature is high, the bimetallic strip expands and bends towards the damping sleeve 8, applying additional preload to the damping sleeve 8 to offset the stiffness loss caused by the damping sleeve 8 softening as the temperature rises. When the temperature drops, the bimetallic strip bends in the opposite direction, reducing the preload on the damping sleeve 8, thereby compensating for the increased stiffness of the damping sleeve 8 due to hardening. Furthermore, the bimetallic strip contacts the end of the guide post 4, buffering the contact between the guide post 4 and the copper contact 6, thus improving the damping effect. After the guide post 4 contacts the copper contact 6 and the circuit is connected, the bimetallic strip expands and deforms due to the temperature generated by the current, further ensuring the stability during the horn pressing process.

[0022] The guide sleeve 7 has claws 11 on both sides of its end. The claws 11 pass through the inside of the damping sleeve 8 and engage with one end of the first metal sheet 9. The end of the first metal sheet 9 has a bent structure. The claws 11 engage with the bent part of the first metal sheet 9. The engagement of the claws 11 and the first metal sheet 9 makes the damping sleeve 8 fit tightly between the guide sleeve 7 and the bimetallic sheet, ensuring the stability of the damping.

[0023] When in use, pressing causes the main body 1 of the box to move along the guide post 4, which in turn causes the conductive plate 5 to float. The end of the guide post 4 contacts the copper contact 6, which makes the circuit conductive and realizes the speaker function. The damping sleeve 8 and the spring 13 dampen vibration during the pressing process to ensure the stability of pressing.

[0024] 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 there are many other variations of the different aspects of the invention as described above, 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 vibration-damping driver's safety airbag housing, comprising a housing body (1) and an airbag module (2), wherein the airbag module (2) is mounted on the housing body (1), characterized in that, The box body has multiple sets of guide holes (3), and guide posts (4) are movably installed in each guide hole (3). A vibration damping mechanism is set between the guide post (4) and the guide hole (3) to reduce the vibration of the box body (1). The box body (1) is equipped with a compensation mechanism to elastically compensate the vibration damping mechanism. A conductive sheet pressure plate (5) is installed inside the box body (1). Copper contacts (6) are set on the conductive sheet pressure plate (5) corresponding to the guide posts (4). The guide posts (4) and copper contacts (6) serve as the negative and positive contacts of the speaker, respectively.

2. The vibration-damping driver's airbag housing according to claim 1, characterized in that, The guide post (4) is made of metal.

3. The vibration-damping driver's airbag housing according to claim 1, characterized in that, The vibration damping mechanism includes a guide sleeve (7) and a damping sleeve (8) sleeved on the guide post (4). The damping sleeve (8) is engaged inside the guide hole (3) and the damping sleeve (8) is sleeved on the outside of the guide sleeve (7). A guide seat (12) is installed on the upper end of the guide sleeve (7). A spring (13) is sleeved on the guide post (4) and the spring (13) is located between the guide seat (12) and the guide sleeve (7).

4. The vibration-damping driver's airbag housing according to claim 3, characterized in that, The compensation mechanism includes a first metal sheet (9) and a second metal sheet (10). The first metal sheet (9) and the second metal sheet (10) are fitted together and fixed on the inner wall of the box body (1). The first metal sheet (9) is in contact with the end of the guide post (4), and the second metal sheet (10) is in contact with the damping sleeve (8).

5. A vibration-damping driver's airbag housing according to claim 4, characterized in that, The guide sleeve (7) has claws (11) on both sides of its end. The claws (11) pass through the inside of the damping sleeve (8) and engage with the first metal piece (9).

6. The vibration-damping driver's airbag housing according to claim 1, characterized in that, The box body (1) is made of plastic injection molding.

7. The vibration-damping driver's airbag housing according to claim 1, characterized in that, The box body (1) has an installation groove (14) on one side of its surface.

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