Driver airbag integrated horn press device

Abstract

A driver airbag integrated horn pressing device, comprising a steering wheel framework and a metal supporting plate on which an airbag module is installed, characterized in that: at least three groups of conducting assemblies are arranged between the steering wheel framework and the metal supporting plate, the lower ends of the conducting assemblies are respectively clamped to the steering wheel framework by clamping springs; an electrically conductive sheet is fixed between the bottom of the airbag module and the metal supporting plate, the electrically conductive sheet is abutted against a boss on the metal supporting plate through a support ring bolt, and a connector is fixed to the bottom surface of the metal supporting plate; the electrically conductive sheet is integrally stamped from metal material, is approximately trapezoidal, and passes above each group of conducting assemblies; trapezoidal protrusions are arranged above the positioning pins corresponding to each group of conducting assemblies on the electrically conductive sheet and are close to the positioning pins. The device can realize quick contact between the electrically conductive sheet and the conducting assemblies by pressing the airbag module, thereby realizing conduction of the horn circuit; mechanical impact can be avoided through the buffering effect of the reset spring in the conducting assembly, and the overall working noise is ≤55 dB.

Description

Technical Field

[0001] This invention relates to the field of automotive safety and control systems, and in particular to a driver's airbag integrated horn pressing device. Background Technology

[0002] Most existing car horn control systems are integrated structures. For example, CN116691580A discloses a steering wheel airbag module installation structure. The upper conductive plate is pre-set in the receiving base, and the other end of the upper conductive plate leads out a connector plate from one side of the receiving base for connecting the horn wiring harness. The lower conductive plate is pre-set in the guide sleeve. The upper end of the lower conductive plate is annular and has trapezoidal protrusions evenly distributed around its circumference for contacting the upper conductive plate to achieve horn circuit conduction. The lower part of the lower conductive plate has multiple patches evenly distributed around its circumference in the guide sleeve. The patches are attached to the outer edge of the fixing pin to achieve horn circuit conduction.

[0003] This speaker system has the following technical problems: 1. The base and guide sleeve with internal conductive sheet need to be produced by injection molding. During production, the conductive sheet will come into contact with the mold. Long-term contact will cause friction and wear on the mold, resulting in insufficient positioning accuracy. This leads to insufficient matching accuracy between the conductive sheet and the mold and shortens the service life of the mold, resulting in high mold maintenance costs. 2. Wear of the conductive sheet on the mold will cause glue overflow in the receiving base and guide sleeve. This glue overflow will block the joint between the upper and lower conductive sheets, causing the signal to be interrupted and the horn to fail to sound, which will increase the product defect rate and reduce product profits. 3. Since the upper conductive plate requires two external speaker wiring harnesses and 6-8 copper conductive plates to achieve speaker conduction, the overall cost of realizing the function is high; the production process involves a large number of parts, which increases the production cycle and results in higher labor costs. 4. The connector assembly is a non-standard part. After installation, it is easily deformed by external forces, resulting in gaps. During use, there are problems such as unclear pressing feedback and insufficient compatibility. It is also difficult to balance the ease of installation with the stability under complex working conditions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a driver airbag integrated horn pressing and sounding system that can accurately contact and trigger the horn function.

[0005] The technical solution of the present invention is as follows: A driver airbag integrated horn pressing device includes a steering wheel frame and a metal support plate for mounting the airbag module. Its special feature is that at least three sets of conductive components are provided between the steering wheel frame and the metal support plate. The lower ends of the conductive components are respectively engaged with the steering wheel frame by snap rings and are used to connect to the negative terminal of the horn power supply module. A conductive sheet is fixed between the bottom of the airbag module and the metal support plate. The conductive sheet abuts against the boss on the metal support plate through the support ring bolt. A connector is fixed on the bottom surface of the metal support plate for connecting the positive terminal of the speaker power supply module. The conductive sheet is integrally stamped from metal. The conductive sheet is approximately trapezoidal and passes over the top of each set of conductive components. A trapezoidal protrusion is provided on the conductive sheet above the positioning pin corresponding to each set of conductive components and close to the positioning pin. This is used to achieve rapid contact between the conductive sheet and the conductive component when the airbag module is pressed, thereby realizing the conduction of the speaker circuit.

[0006] As a further preferred embodiment, the conductive assembly includes a positioning pin, which passes sequentially through mounting holes on the metal support plate and the steering wheel frame. The retaining ring is engaged in the annular groove at the lower end of the positioning pin. A spring base, a return spring, and a positioning base are sequentially sleeved on the positioning pin between the metal support plate and the steering wheel frame. The spring base and the positioning base are movably engaged by a claw provided on the positioning base. The return spring is sleeved on the spring base and clamped between the spring base and the positioning base.

[0007] As a further preferred embodiment, positioning posts are provided on both sides of each trapezoidal protrusion on the conductive sheet at the bottom of the airbag module housing. The conductive sheet is fixed to the bottom of the housing by heat fusion through the positioning posts, thereby realizing the rapid pre-fixed installation of the conductive sheet.

[0008] As a further preferred option, a trapezoidal boss is provided at each trapezoidal protrusion on the conductive sheet at the bottom of the airbag module housing, with a gap of 0.1mm between the trapezoidal protrusions and the trapezoidal boss, so as to buffer the conductive sheet after pressing and improve the noise reduction effect.

[0009] As a further preferred embodiment, the distance between the positioning pin of the conductive component and the trapezoidal protrusion of the conductive sheet is 1.0-1.3mm, so as to achieve reliable contact with a short stroke when the horn is pressed.

[0010] The beneficial effects of this invention are: 1. A conductive sheet is fixed between the bottom of the airbag module and the metal support plate, and a connector is fixed on the bottom surface of the metal support plate for connecting the positive terminal of the speaker power supply module. A trapezoidal protrusion is provided above the positioning pin of each set of conductive components on the conductive sheet and close to the positioning pin. Therefore, by pressing the airbag module, the conductive sheet and the conductive component can be quickly contacted, thereby realizing the conduction of the speaker circuit. The buffering effect of the reset spring in the conductive component can avoid mechanical impact. The overall working noise is ≤55dB, which is significantly better than the noise reduction effect of the traditional mechanical speaker system (working noise ≥72dB).

[0011] 2. Since the conductive sheet is integrally stamped from metal and passes over each set of conductive components after installation, and connects to the positive terminal of the speaker power supply module through the connector on the metal support plate, the speaker pressing structure is greatly simplified, the number of parts is effectively reduced, and the traditional conductive sheet embedding process, redundant wire harnesses, complex connectors and other components are eliminated. At the same time, the post-installation process and time of the parts are reduced, the installation is convenient, the assembly time is shortened by 60%, and the production and labor costs are effectively reduced.

[0012] 3. By pressing the airbag module, the conductive sheet and the conducting component can be quickly brought into contact, thus enabling the horn circuit to be turned on; the trigger time is short, with a trigger response time of ≤3ms; the operation is convenient and the response is rapid, which can improve driving safety; the positive and negative lines are arranged separately, which has strong anti-electromagnetic interference capability; the mechanical structure is less affected by temperature and vibration, which can reduce false triggering caused by external vibration, ensuring stable horn sounding without interruption or false triggering problems. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 yes Figure 1 A bottom view.

[0015] Figure 3 yes Figure 1 AA sectional view.

[0016] Figure 4 This is a schematic diagram of the installation of the conductive sheet of the present invention.

[0017] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 6 This is a structural diagram of a metal pallet.

[0019] Figure 7 This is a schematic diagram of the spring base.

[0020] Figure 8 This is a schematic diagram of the positioning base.

[0021] In the diagram: 1. Steering wheel frame; 2. Conductor assembly; 3. Metal support plate; 4. Airbag mounting module; 5. Connector; 6. Snap ring; 7. Support ring bolt; 8. Gas generator; 9. Housing; 901. Trapezoidal boss; 902. Positioning pin; 10. Support ring; 11. Top cover; 12. Airbag; 13. Conductive sheet; 131. Trapezoidal protrusion; 14. Plastic-coated part; 15. Damping sleeve; 16. Guide sleeve; 17. Spring base; 171. First snap-fit ​​window; 172. Second snap-fit ​​window; 18. Return spring; 19. Positioning base; 191. Claw; 20. Positioning pin. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-8 As shown, the present invention relates to a driver airbag integrated horn pressing device, including a steering wheel frame 1 and a metal support plate 3 for mounting an airbag module 4. The metal support plate 3 is made of cold-rolled steel sheet and is galvanized for rust prevention. At least three sets of conductive components 2 are provided between the steering wheel frame 1 and the metal support plate 3. In this embodiment, three sets are used as an example and are arranged in an isosceles triangle. The lower end of each set of conductive components 2 is respectively connected to the steering wheel frame 1 by a retaining spring 6, and is used to connect to the negative terminal of the horn power supply module through the steering wheel frame 1.

[0024] The airbag module 4 includes a shell 9 and a top cover 11 that are nested and snapped together. The lower ends of the shell 9 and the top cover 11 are embedded in a metal support plate 3. A gas generator 8 and an air bag 12 are fixed inside the shell 9 by a support ring 10. The support ring 10 passes through the bosses on the shell 9 and the metal support plate 3 by four support ring bolts 7 and is fixed by nuts.

[0025] A conductive sheet 13 is fixed between the bottom of the airbag module 4 and the metal support plate 3. The conductive sheet 13 abuts against the boss on the metal support plate 3 through two of the support ring bolts 7. A connector 5 is fixed to the bottom surface of the metal support plate 3 by rivets. The connector 5 is a waterproof automotive connector used to connect to the positive terminal of the horn power supply module.

[0026] The conductive sheet 13 is integrally stamped from metal, preferably 304 stainless steel. The conductive sheet 13 is approximately trapezoidal with an open bottom edge and passes over the top of each set of conductive components 2. A trapezoidal protrusion 131 is provided on the conductive sheet 13 above the positioning pin of each set of conductive components 2 and close to the positioning pin 20. This is used to achieve rapid contact between the conductive sheet 13 and the conductive component 2 when the airbag module 4 is pressed, thereby realizing the conduction of the speaker circuit.

[0027] Positioning posts 902 are provided on both sides of each trapezoidal protrusion on the conductive sheet 13 at the bottom of the housing 9 of the airbag module 4. The conductive sheet 13 is fixed to the bottom of the housing 9 by heat fusion through the positioning posts 902, so as to realize the rapid pre-fixed installation of the conductive sheet 13.

[0028] At the bottom of the housing 9 of the airbag module 4, a trapezoidal boss 901 is provided at each trapezoidal protrusion 131 on the conductive sheet 13. The gap between the trapezoidal protrusion 131 and the trapezoidal boss 901 is 0.1mm, so as to buffer the conductive sheet 13 after pressing and improve the noise reduction effect.

[0029] The conductive assembly 2 includes a positioning pin 20. The upper end of the positioning pin 20 is a large end, and the lower end passes through the mounting holes on the metal support plate 3 and the steering wheel frame 1 in sequence. The retaining spring 6 is U-shaped and is fitted into the annular groove at the lower end of the positioning pin 20. A plastic-coated part 14 is injection molded into each mounting hole on the metal support plate 3. Each plastic-coated part 14 is tightly wrapped around the inner edge of the corresponding mounting hole. A damping sleeve 15 made of silicone or rubber is nested in each plastic-coated part 14. A guide sleeve 16, a spring base 17, a return spring 18, and a positioning base 19 are sequentially fitted on the positioning pin 20 from top to bottom. The guide sleeve 16 passes through the damping sleeve 15, and three elastic hooks are evenly distributed along the circumference at the lower end. The hooks are inserted into the spring base 17 and respectively locked in the first locking window 171 provided on the spring base 17, so that the upper end of the spring base 17 rests against the lower end of the damping sleeve 15 and is integrated with the metal support plate 3. The spring base 17, the return spring 18, and the positioning base 19 are located between the metal support plate 3 and the steering wheel frame 1. The spring base 17 and the positioning base 19 are movably engaged with the second engagement window 172 on the spring base 17 via a claw 191 on the positioning base 19. The first engagement window 171 and the second engagement window 172 are arranged alternately along the circumference of the spring base 17. The return spring 18 is sleeved on the spring base 17 and clamped between the spring base 17 and the positioning base 19. The lower end of the positioning base 19 is tapered and sits in a tapered mounting hole on the steering wheel frame 1.

[0030] The distance between the upper end face of the positioning pin 20 of the conductive component 2 and the bottom surface of the trapezoidal protrusion 131 of the conductive sheet 13 is 1.0-1.3mm, so as to achieve reliable contact with a short stroke when the horn is pressed.

[0031] During operation, when the driver presses the upper cover 11 of the airbag module 4, the airbag module 4 drives the metal support plate 3 to move downward and compresses the return spring 18. When the trapezoidal protrusion of the conductive piece 13 contacts the upper end of the positioning pin 20, the steering wheel frame 1 is connected to the negative terminal of the horn power supply module and is kept conductive with the positioning pin 20 through the snap ring 6. The metal support plate 3 is connected to the positive terminal of the horn power supply module through the connector. The conductive piece 13 and the metal support plate 3 are locked and fixed, thus forming a complete electrical signal circuit of "positive terminal of power supply module → connector → metal support plate → conductive piece → positioning pin → snap ring → steering wheel frame → negative terminal of power supply module → horn actuator". The horn actuator immediately produces a sound after receiving the conduction signal. When the upper cover 11 is released, the return spring 18 returns to its deformation, pushes the airbag module 4 and the metal support plate 3 to return upward, separates the positioning pin 20 from the conductive piece 13, disconnects the electrical signal circuit, and the horn stops sounding.

[0032] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. A driver's airbag integrated horn pressing device, comprising a steering wheel frame and a metal support plate for mounting the airbag module, characterized in that: in At least three sets of conductive components are provided between the steering wheel frame and the metal support plate. The lower end of each conductive component is connected to the steering wheel frame by a snap ring and is used to connect to the negative terminal of the horn power supply module. A conductive sheet is fixed between the bottom of the airbag module and the metal support plate. The conductive sheet abuts against the boss on the metal support plate through the support ring bolt. A connector is fixed on the bottom surface of the metal support plate for connecting the positive terminal of the speaker power supply module. The conductive sheet is integrally stamped from metal. The conductive sheet is approximately trapezoidal and passes over the top of each set of conductive components. A trapezoidal protrusion is provided on the conductive sheet above the positioning pin corresponding to each set of conductive components and close to the positioning pin. This is used to achieve rapid contact between the conductive sheet and the conductive component when the airbag module is pressed, thereby realizing the conduction of the speaker circuit.

2. The driver's airbag integrated horn pressing device according to claim 1, characterized in that: The conductive assembly includes a positioning pin, which passes sequentially through mounting holes on the metal support plate and the steering wheel frame. The retaining ring is fitted into the annular groove at the lower end of the positioning pin. A spring base, a return spring, and a positioning base are sequentially sleeved on the positioning pin between the metal support plate and the steering wheel frame. The spring base and the positioning base are movably engaged by a claw provided on the positioning base. The return spring is sleeved on the spring base and clamped between the spring base and the positioning base.

3. The driver's airbag integrated horn pressing device according to claim 1, characterized in that: Positioning posts are provided on both sides of each trapezoidal protrusion on the conductive sheet at the bottom of the airbag module housing. The conductive sheet is fixed to the bottom of the housing by heat fusion through the positioning posts, so as to realize the rapid pre-fixed installation of the conductive sheet.

4. A driver airbag integrated horn pressing device according to claim 1 or 3, characterized in that: At the bottom of the airbag module housing, a trapezoidal boss is provided at each trapezoidal protrusion on the conductive sheet. The gap between the trapezoidal protrusion and the trapezoidal boss is 0.1mm to buffer the conductive sheet after pressing and improve the noise reduction effect.

5. A driver airbag integrated horn pressing device according to claim 1 or 2, characterized in that: The distance between the positioning pin of the conductive component and the trapezoidal protrusion of the conductive sheet is 1.0-1.3mm to achieve reliable contact with a short stroke when the horn is pressed.

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