Automobile steering wheel with air bag device

Abstract

The embodiment of the invention provides an automobile steering wheel with an air bag device, the air bag device comprises a cover plate, an air bag, a shell and an air bag support, the shell is attached to a wheel hub area of the steering wheel through a horn switch device, the horn switch device comprises a pin, a rod part of the pin penetrates through a mounting hole of the shell and is fixed on the steering wheel through a fixing piece, and the air bag support is fixed on the shell. The head of the pin is arranged between the mounting hole and the air bag support, and the offset piece is arranged between the bottom of the shell and the steering wheel and always pushes the shell to move away from the steering wheel till the shell makes contact with the lower end face of the head of the pin and then stops; the fixed contact is arranged on the upper end face of the pin, the movable contact is fixed on the lower surface of the air bag support, the air bag is provided with a through hole, and the movable contact penetrates through the through hole to be opposite to the fixed contact. The fixed contact is arranged at the top of the pin, the movable contact is arranged on the air bag support, the movable contact can move in the direction close to the fixed contact by pressing the cover plate, and therefore the horn device is started, and a traditional horn plate component can be omitted.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile steering wheels, and in particular to an automobile steering wheel with an airbag device. Background Art

[0002] The car steering wheel horn pressing mechanism is integrated into the steering wheel body, and the horn plate and the contact are separated by a spring. After pressing the horn plate, the circuit is connected and the horn sounds. When the horn plate is released, the spring pops the horn plate and the contact apart, the circuit is disconnected, and the horn does not sound. At present, the steering wheel horn plate is installed inside the steering wheel body, and the horn plate takes up more space inside the steering wheel. Summary of the invention

[0003] In view of this, an embodiment of the present specification provides a car steering wheel with an airbag device, by setting a fixed contact on the top of a pin and a movable contact on an airbag bracket, the movable contact passes through the airbag and corresponds to the fixed contact, and pressing the cover plate can cause the movable contact to move in a direction close to the fixed contact, thereby starting the horn device, eliminating the traditional horn plate component and reducing the space occupied by the horn device in the steering wheel.

[0004] The embodiments of this specification provide the following technical solutions: a car steering wheel with an airbag device, the airbag device comprising a cover plate, an airbag, a shell and an airbag bracket, the airbag bracket is placed in the airbag and the airbag opening edge is fixed to the airbag bracket, the airbag bracket and the airbag in a folded state are placed in a receiving cavity formed by the cover plate and the shell, the shell is attached to the steering wheel hub area through a horn switch device,

[0005] The horn switch device comprises:

[0006] A pin, the rod of which passes through the mounting hole of the housing and is fixed to the steering wheel through a fixing member, and the head of the pin is placed between the mounting hole and the airbag bracket.

[0007] A biasing member is disposed between the bottom of the housing and the steering wheel, and always pushes the housing to move away from the steering wheel until it contacts the lower end surface of the head of the pin and stops;

[0008] The fixed contact is arranged on the upper end surface of the head of the pin.

[0009] The movable contact is fixed on the lower surface of the airbag support, and the airbag has a through hole. The movable contact passes through the through hole and is opposite to the fixed contact.

[0010] When the cover plate is pressed, the movable contact moves downward together with the housing and the airbag support, so that the movable contact contacts the fixed contact portion and is in a conducting state, thereby triggering the horn switch device.

[0011] Preferably, the airbag bracket has a central through hole for embedding the gas generator and a plurality of studs located around the central through hole. The plurality of studs respectively and successively pass through the through holes around the airbag opening, the through holes of the shell and the through holes on the flange of the gas generator and extend outward, and are fixed by nuts.

[0012] Preferably, the movable contact is arranged on a boss of the airbag bracket, the boss extends further toward the fixed contact than the plane where the root of the stud is located, and a protrusion is provided on the shell for accommodating the boss and the head of the pin.

[0013] Preferably, the housing is attached to the steering wheel hub area through three sets of horn switch devices, which are respectively located at the 3, 6 and 9 o'clock positions of the edge of the airbag bracket.

[0014] Preferably, the periphery of the central through hole has a folded portion extending toward the interior of the shell and a flanged bent portion at the end of the folded portion, the folded portion gradually expands outward to provide guidance for the gas generator airflow, and the flanged bent portion contacts the airbag in a folded state.

[0015] Preferably, a hollow cylindrical shell member extending into the interior of the shell is provided on the outer periphery of the mounting hole of the shell, and the shell member is integrally injection molded with the shell, and an elastomer is provided in the shell member, and the elastomer has locking flanges formed at both ends thereof for clamping the mounting hole of the shell, wherein one side of the locking flange is retained on the shell member, and the rod portion of the pin passes through the central opening of the elastomer and extends toward the steering wheel.

[0016] Preferably, the elastomer is made of elastic rubber, silicone or soft plastic.

[0017] Preferably, the fixing member comprises a retaining spring which is fixed on the steering wheel. The retaining spring is always moved in a direction close to the pin due to its own elastic bias. A retaining groove is provided at the end of the pin, and the retaining spring is elastically embedded in the retaining groove.

[0018] Preferably, a hollow cylindrical resin part is provided between the lower portion of the pin and the steering wheel, the resin part is fixed at the mounting opening of the steering wheel, a plurality of elastic ribs are provided on the inner wall of the resin part, and the elastic ribs abut against the outer wall of the pin.

[0019] Preferably, an elastic material portion is provided on the upper end surface of the resin member.

[0020] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0021] A new horn switch device is provided, a fixed contact is provided on the top of a pin, a movable contact is provided on an airbag bracket, the movable contact passes through the airbag and corresponds to the fixed contact, and pressing the cover plate can cause the movable contact to move toward the fixed contact, thereby starting the horn device. The traditional horn plate component can be omitted, and the space occupied by the horn device in the steering wheel can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a car steering wheel with an airbag device provided by the present application;

[0024] Figure 2 It is a schematic diagram of the unassembled structure of the airbag and the airbag bracket of the automobile steering wheel with the airbag device provided by the present application;

[0025] Figure 3 It is a schematic structural diagram of an airbag and an airbag bracket of a car steering wheel with an airbag device provided by the present application after being assembled;

[0026] Figure 4 It is a schematic diagram of the exploded structure of a car steering wheel with an airbag device provided by the present application;

[0027] Figure 5 It is a structural schematic diagram of the pin installation of the steering wheel of a car with an airbag device provided by the present application.

[0028] In the figure, 1, cover plate; 2, airbag; 3, shell; 4, airbag bracket; 41, folding part; 42, flange bending part; 5, pin; 6, biasing member; 7, fixed contact; 8, movable contact; 9, steering wheel; 10, protrusion; 11, through hole; 12, stud; 13, central through hole; 14, boss; 15, elastomer; 16, resin part; 17, fixing member; 18, shell member; 19, retaining groove. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0030] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0031] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0032] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0033] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described may be practiced without these specific details.

[0034] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0035] like Figure 1-Figure 4 As shown, a car steering wheel with an airbag device, the airbag device includes a cover plate 1, an airbag 2, a shell 3 and an airbag bracket 4, the airbag bracket 4 is placed in the airbag 2 and the opening edge of the airbag 2 is fixed on the airbag bracket 4, the airbag bracket 4 and the airbag 2 in a folded state are placed in the accommodating cavity formed by the cover plate 1 and the shell 3, and the shell 3 is attached to the hub area of ​​the steering wheel 9 through a horn switch device.

[0036] The horn switch device comprises:

[0037] The pin 5 has a rod portion passing through the mounting hole of the housing 3 and is fixed to the steering wheel 9 through a fixing member 17, and a head portion of the pin 5 is placed between the mounting hole and the airbag bracket 4.

[0038] The biasing member 6 is placed between the bottom of the housing 3 and the steering wheel 9, and always pushes the housing 3 to move away from the steering wheel 9 until it contacts the lower end surface of the head of the pin 5 and stops;

[0039] The fixed contact 7 is arranged on the upper end surface of the head of the pin 5.

[0040] The movable contact 8 is fixed on the lower surface of the airbag bracket 4. The airbag 2 has a through hole 11. The movable contact 8 passes through the through hole 11 and faces the fixed contact 7.

[0041] When the cover plate 1 is pressed, the movable contact 8 moves downward together with the housing 3 and the airbag support 4, so that the movable contact 8 contacts the fixed contact 7 and is in a conducting state, thereby triggering the horn device.

[0042] A new horn switch device is designed, which eliminates the traditional horn plate component. The fixed contact 7 of the horn switch device is set on the top of the pin 5, and the movable contact 8 is set on the airbag bracket 4. At the same time, a through hole is opened on the airbag 2, and the movable contact 8 passes through the through hole 11 to correspond to the fixed contact 7. When the cover plate 1 is subjected to pressure, the cover plate 1 presses the shell 3 and the airbag bracket 4 to move downward relative to the pin 5, and the movable contact 8 moves with the airbag bracket 4. When the movable contact 8 contacts the fixed contact 7 on the top of the pin 5, the horn device is triggered to start working.

[0043] It should be noted that the movable contact 8 is located above the fixed contact 7, and the upper surface area of ​​the fixed contact 7 can be set to be larger than the lower surface area of ​​the movable contact 8 to ensure that the movable contact 8 can contact the fixed contact 7 when moving downward, thereby triggering the speaker device.

[0044] It should also be noted that the biasing member 6 can be a spring, which is sleeved on the rod of the pin 5. The top end of the spring contacts the bottom of the shell 3 and pushes the shell 3 to contact the lower end surface of the head of the pin 5.

[0045] like Figure 2-Figure 3As shown, in some embodiments, the airbag bracket 4 has a central through hole 13 for embedding the gas generator and a plurality of studs 12 located around the central through hole 13. The plurality of studs 12 respectively pass through the through holes around the opening of the airbag 2, the through holes of the shell 3 and the through holes on the flange of the gas generator in sequence and extend outward, and are fixed by nuts. By opening the central through hole 13 on the airbag bracket 4, the gas generator passes through the through hole and extends into the airbag 2, thereby ensuring the gas generator's gas supply to the airbag 2. At the same time, the airbag bracket 4, the airbag 2, the shell 3 and the flange of the gas generator are connected by bolts to achieve the fixing operation of the gas generator.

[0046] like Figure 2-Figure 3 As shown, in some embodiments, the movable contact 8 is arranged on the boss 14 of the airbag bracket 4, and the boss 14 extends further toward the fixed contact 7 than the plane where the root of the stud 12 is located, and a protrusion 10 is provided on the shell 3 for accommodating the boss 14 and the head of the pin 5. The airbag bracket 4 extends on one side close to the pin 5 to form the boss 14, and the shell 3 is provided with a protrusion 10 for accommodating the boss 14. The arrangement of the boss 14 and the protrusion 10 can not only provide more space for the folding of the airbag 2, but also when the airbag 2 is inflated and unfolded, the boss 14 will press the airbag 2 near the movable contact 8 tightly in the protrusion 10, so as to prevent the airbag 2 from leaking at the movable contact 8.

[0047] like Figure 2-Figure 4 As shown, in some embodiments, the housing 3 is attached to the hub area of ​​the steering wheel 9 through three groups of horn switch devices, which are respectively located at the 3, 6, and 9 o'clock positions on the edge of the airbag bracket 4. By setting three groups of horn switches, the three groups of horn switches are distributed in an isosceles triangle at the 3, 6, and 9 o'clock positions on the edge of the airbag bracket 4, respectively, so that the movable contact 8 can contact the fixed contact 7 when the driver presses the cover plate 1, thereby ensuring the control effect of the horn switch on the horn device.

[0048] like Figure 1 and Figure 5 As shown, in some embodiments, the periphery of the central through hole 13 has a folded portion 41 extending toward the interior of the shell 3 and a flanged bent portion 42 at the end of the folded portion 41, the folded portion 41 gradually expands outward to provide guidance for the gas generator airflow, and the flanged bent portion 42 is in contact with the airbag 2 in a folded state. By providing a gradually expanding folded portion 41 on one side of the central through hole 13 close to the interior of the shell 3, when the gas generator inflates the airbag 2, the folded portion 41 can play a role in guiding the flow, and the end of the folded portion 41 is bent to form a flanged bent portion 42, and the bent portion of the flanged bent portion 42 is in contact with the airbag 2, and the bent portion is relatively smooth to avoid scratching the airbag 2.

[0049] like Figure 1 and Figure 5 As shown, in some embodiments, a hollow cylindrical shell member 18 extending into the shell 3 is provided on the periphery of the mounting hole of the shell 3, and the shell member 18 and the shell 3 are integrally injection-molded. An elastomer 15 is provided in the shell member 18, and the elastomer 15 is formed with snap-fit ​​flanges at both ends thereof for clamping the mounting hole of the shell 3, wherein the snap-fit ​​flange on one side is retained on the shell member 18, and the rod portion of the pin 5 passes through the central opening of the elastomer 15 and extends toward the steering wheel. The shell member 18 and the shell 3 are integrally injection-molded, and there is no need to produce the shell member 18 separately for installation. The elastomer 15 is provided in the shell member 18, and the elastomer 15 is installed at the mounting hole of the shell 3 through the snap-fit ​​flange, and is retained on one side by the shell member 18, so as to ensure the stability of the interaction between the elastomer 15 and the pin 5.

[0050] In some embodiments, the elastomer 15 is made of elastic rubber, silicone or soft plastic, and one of elastic rubber, silicone or soft plastic can be selected as the elastomer 15 according to actual conditions.

[0051] like Figure 1 and Figure 5 As shown, in some embodiments, the fixing member 17 includes a retaining spring, which is fixed to the steering wheel 9. The retaining spring is always moved in the direction close to the pin under the action of its own elastic bias. A retaining groove 19 is provided at the end of the pin 5, and the retaining spring is elastically embedded in the retaining groove 19. The retaining spring moves in the direction close to the pin 5 under the action of its own elastic bias, and the retaining spring is elastically embedded in the retaining groove 19 at the end of the pin 5, thereby fixing the pin 5.

[0052] like Figure 1 and Figure 5 As shown, in some embodiments, a hollow cylindrical resin part 16 is arranged between the lower part of the pin 5 and the steering wheel 9. The resin part 16 is fixed at the installation port of the steering wheel 9. The inner wall of the resin part 16 is provided with a plurality of elastic ribs, and the elastic ribs abut against the outer wall of the pin. The resin part 16 can be deformed to facilitate installation. The inner wall of the resin part 16 is provided with a plurality of evenly distributed elastic ribs, and the elastic ribs can eliminate the noise generated by the vibration of the pin 5.

[0053] like Figure 5 As shown, in some embodiments, an elastic material portion is provided on the upper end surface of the resin member 16. By providing the elastic material portion on the upper end surface of the resin member 16, the elastic material portion can play a buffering role, further weaken the vibration of the pin 5, and avoid abnormal noise caused by the vibration of the pin.

[0054] The same or similar parts of the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment described later, since it corresponds to the system, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A car steering wheel with an airbag device, the airbag device comprising a cover plate, an airbag, a shell and an airbag bracket, the airbag bracket is placed in the airbag and the airbag opening edge is fixed to the airbag bracket, the airbag bracket and the airbag in a folded state are placed in a receiving cavity formed by the cover plate and the shell, and the shell is attached to the steering wheel hub area through a horn switch device, It is characterized in that The horn switch device comprises: A pin, the rod of which passes through the mounting hole of the housing and is fixed to the steering wheel through a fixing member, and the head of the pin is placed between the mounting hole and the airbag bracket. A biasing member is disposed between the bottom of the housing and the steering wheel, and always pushes the housing to move away from the steering wheel until it contacts the lower end surface of the head of the pin and stops; The fixed contact is arranged on the upper end surface of the head of the pin. The movable contact is fixed on the lower surface of the airbag support, and the airbag has a through hole. The movable contact passes through the through hole and is opposite to the fixed contact. When the cover plate is pressed, the movable contact moves downward together with the housing and the airbag support, so that the movable contact contacts the fixed contact portion and is in a conducting state, thereby triggering the horn switch device.

2. The vehicle steering wheel with airbag device according to claim 1, It is characterized in that The airbag bracket has a central through hole for the gas generator to be embedded and a plurality of studs located around the central through hole. The plurality of studs respectively pass through the through holes around the airbag opening, the through holes of the shell and the through holes on the flange of the gas generator in sequence and extend outward, and are fixed by nuts.

3. The vehicle steering wheel with airbag device according to claim 2, It is characterized in that The movable contact is arranged on the boss of the airbag bracket, and the boss extends further toward the fixed contact than the plane where the root of the stud is located, and a protrusion is provided on the shell for accommodating the boss and the head of the pin.

4. The automobile steering wheel with an airbag device according to claim 3, It is characterized in that The housing is attached to the steering wheel hub area through three sets of horn switch devices, which are respectively located at the 3, 6 and 9 o'clock positions on the edge of the airbag bracket.

5. The automobile steering wheel with an airbag device according to claim 2, It is characterized in that The periphery of the central through hole has a folded portion extending toward the interior of the shell and a flanged bent portion at the end of the folded portion, the folded portion gradually expands outward to provide guidance for the gas generator airflow, and the flanged bent portion contacts the airbag in a folded state.

6. The automobile steering wheel with an airbag device according to claim 1, It is characterized in that A hollow cylindrical shell member extending into the interior of the shell is arranged on the periphery of the mounting hole of the shell, and the shell member is integrally injection-molded with the shell. An elastomer is arranged in the shell member, and the elastomer has locking flanges formed at both ends thereof for clamping the mounting hole of the shell, wherein one side of the locking flange is retained on the shell member, and the rod portion of the pin passes through the central opening of the elastomer and extends toward the steering wheel.

7. The vehicle steering wheel with airbag device according to claim 6, It is characterized in that The elastic body is made of elastic rubber, silicone or soft plastic.

8. The automobile steering wheel with an airbag device according to claim 1, It is characterized in that The fixing member comprises a retaining spring which is fixed on the steering wheel. The retaining spring is always moved in a direction close to the pin under its own elastic bias. A retaining groove is provided at the end of the pin, and the retaining spring is elastically embedded in the retaining groove.

9. The automobile steering wheel with an airbag device according to claim 8, It is characterized in that A hollow cylindrical resin piece is arranged between the lower part of the pin and the steering wheel. The resin piece is fixed at the mounting opening of the steering wheel. A plurality of elastic ribs are arranged on the inner wall of the resin piece. The elastic ribs abut against the outer wall of the pin.

10. The vehicle steering wheel with airbag device according to claim 9, It is characterized in that An elastic material portion is disposed on the upper end surface of the resin member.

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