A steering wheel switch

Abstract

This utility model relates to a steering wheel switch, comprising a housing, a base plate, a cover plate, and a circuit board. The circuit board has a plurality of tactile switches, and the housing has a plurality of buttons that are oscillatingly mounted. Each button has a trigger rod opposite to one of the tactile switches. The housing contains a plurality of mounting rods, each located on one side of one of the tactile switches. A reset spring is engaged with each mounting rod. The fixed end of the reset spring has a mounting hole, and the mounting rod passes through the mounting hole, with an interference fit to achieve engagement between the reset spring and the mounting rod. The free end of the reset spring is located between the trigger rod and the tactile switch. This steering wheel switch, through the action of the reset spring, ensures the stability of the tactile switch triggering, reduces the elastic fatigue of the metal spring of the tactile switch, thereby ensuring the stability of the steering wheel switch during use and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a steering wheel switch. Background Technology

[0002] A multi-function steering wheel has a steering wheel switch at both the 3 o'clock and 6 o'clock positions. These switches feature several buttons and toggles. Pressing the buttons or toggling the toggles activates the switches to control vehicle functions such as volume, answering phone calls, and cruise control. To ensure switch durability, most existing steering wheel switches use tactile switches. Tactile switches have a longer lifespan than membrane switches. However, when the trigger lever on a button or toggles directly contacts the top button of the tactile switch, the small size of the top button can cause it to jam. This jamming can prevent the button from functioning properly and affect the normal operation of the steering wheel switch. Furthermore, the button's reset relies on the elasticity of the metal spring within the tactile switch, which can lead to premature fatigue of the spring, further impacting the switch's lifespan.

[0003] To address the aforementioned problems, this utility model provides improvements. Utility Model Content

[0004] This utility model proposes a steering wheel switch that solves the above-mentioned problems existing in the use of the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A steering wheel switch includes a housing, a base plate, a cover plate, and a circuit board. The circuit board has a plurality of tactile switches. The housing has a plurality of buttons that are oscillatingly mounted. Each button has a trigger rod opposite to one of the tactile switches. The housing contains a plurality of mounting rods, each located on one side of one of the tactile switches. A reset spring is engaged with each mounting rod. The fixed end of each reset spring has a mounting hole. The mounting rod passes through the mounting hole and is press-fitted into it to engage the reset spring with the mounting rod. The free end of the reset spring is located between the trigger rod and the tactile switch.

[0007] Preferably, a limiting protrusion is formed on the side of the mounting rod, and a limiting groove matching the limiting protrusion is formed on the inner wall of the mounting hole, and the limiting protrusion is engaged in the limiting groove.

[0008] Preferably, the housing has a plurality of limiting slots that match the width of the fixing end of the reset spring, and the fixing end of the reset spring is engaged in the limiting slots.

[0009] Preferably, a plurality of first snap-fit ​​protrusions are formed on the peripheral side of the housing, and a plurality of first snap-fit ​​holes matching the first snap-fit ​​protrusions are formed on the peripheral side of the cover plate. The first snap-fit ​​protrusions snap into the first snap-fit ​​holes to connect the cover plate and the housing. A plurality of positioning rods are formed inside the housing, and a plurality of positioning holes matching the positioning rods are opened on the circuit board. The positioning rods pass through the positioning holes to position the circuit board inside the housing. A plurality of second snap-fit ​​protrusions are formed on the peripheral side of the bottom plate, and a plurality of second snap-fit ​​holes matching the second snap-fit ​​protrusions are opened on the peripheral side of the housing. The second snap-fit ​​protrusions snap into the second snap-fit ​​holes to connect the bottom plate and the housing, so that the bottom plate presses the circuit board tightly inside the housing.

[0010] Preferably, a plurality of first positioning blocks are formed on the peripheral side of the cover plate, and a plurality of first positioning grooves matching the first positioning blocks are formed on the peripheral side of the housing. When the cover plate is connected to the housing, the first positioning blocks are inserted into the first positioning grooves. A plurality of second positioning blocks are formed on the peripheral side of the bottom plate, and a plurality of second positioning grooves matching the second positioning blocks are formed on the peripheral side of the housing. When the bottom plate is connected to the housing, the second positioning blocks are inserted into the second positioning grooves.

[0011] Preferably, the base plate has several abutting protrusions on its surface facing the circuit board. When the base plate is connected to the housing, the abutting protrusions abut against the circuit board, creating a cavity between the circuit board and the base plate.

[0012] Preferably, the housing has a plurality of swing grooves, each located above a plurality of tactile switches and matching the thickness of the trigger rod, and the trigger rod passes through the swing grooves.

[0013] In summary, the beneficial effects of this utility model are as follows: When the button is pressed, the trigger lever swings, and the trigger lever triggers the tactile switch through the transmission of the reset spring. Since the reset spring can fully contact the trigger lever and the top button of the tactile switch during the swing, the phenomenon of the trigger lever and the top button of the tactile switch getting stuck is avoided, ensuring the stability of this steering wheel switch during use. Furthermore, after the button is released, the reset swing of the reset spring drives the button to reset through the trigger lever, which delays the elastic fatigue of the metal spring of the trigger switch, extends the service life of the trigger switch, and thus extends the service life of the steering wheel switch. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 for Figure 2 A structural diagram from another perspective;

[0018] Figure 4 This is a cross-sectional schematic diagram of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the shell and the reset spring in this utility model.

[0020] In the diagram: 1. Housing; 11. Mounting rod; 12. Limiting protrusion; 13. Limiting slot; 14. First snap-fit ​​protrusion; 15. Positioning rod; 16. Second snap-fit ​​hole; 17. First positioning groove; 18. Second positioning groove; 19. Swing groove; 2. Base plate; 21. Second snap-fit ​​protrusion; 22. Second positioning block; 23. Abutting protrusion; 3. Cover plate; 31. First snap-fit ​​hole; 32. First positioning block; 4. Circuit board; 41. Tactile switch; 42. Positioning hole; 5. Button; 51. Trigger rod; 6. Reset spring; 61. Mounting hole; 62. Limiting groove. Detailed Implementation

[0021] The following will refer to the appendix in the embodiments of this utility model. Figure 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] As shown in the figure, a steering wheel switch includes a housing 1, a base plate 2, a cover plate 3, and a circuit board 4. The circuit board 4 is provided with a plurality of tactile switches 41. The housing 1 is provided with a plurality of buttons 5. Each button 5 has a trigger rod 51 opposite to a tactile switch 41. The housing 1 contains a plurality of mounting rods 11 located on one side of each of the tactile switches 41. A reset spring 6 is snapped onto each mounting rod 11. The fixed end of the reset spring 6 has a mounting hole 61. The mounting rod 11 passes through the mounting hole 61 and is press-fitted with the mounting hole 61 to achieve the snap-fit ​​between the reset spring 6 and the mounting rod 11. The free end of the reset spring 6 is located between the trigger rod 51 and the tactile switch 41.

[0023] In the above structure, pressing button 5 causes it to swing, which in turn causes trigger rod 51 to swing. During the swing of trigger rod 51 toward tactile switch 41, it first contacts reset spring 6, causing the free end of reset spring 6 to swing toward tactile switch 41, thus pressing the top button of tactile switch 41 and triggering tactile switch 41 to achieve the corresponding control function. In the above process, the action of trigger rod 51 triggering tactile switch 41 is transmitted by reset spring 6. Because reset spring 6 can fully contact trigger rod 51 and the top button of tactile switch 41 during the swing process... The touch mechanism prevents the trigger lever 51 from jamming with the top button of the tactile switch 41, ensuring the stability of the steering wheel switch during use. Furthermore, after releasing the press of button 5, the reset spring 6 swings back and forth, driving button 5 to reset via the trigger lever 51. This delays the elastic fatigue of the metal spring of the trigger switch, extending the service life of the trigger switch and thus extending the service life of the steering wheel switch. The reset spring 6 is connected to the housing 1 through the cooperation of the mounting rod 11 and the mounting hole 61. The structure is simple and reliable, effectively controlling the cost of the steering wheel switch.

[0024] Furthermore, based on the above structure, a limiting protrusion 12 is formed on the side of the mounting rod 11, and a limiting groove 62 matching the limiting protrusion 12 is formed on the inner wall of the mounting hole 61. The limiting protrusion 12 is inserted into the limiting groove 62. The cooperation between the limiting protrusion 12 and the limiting groove 62 limits the rotation of the reset spring 6 relative to the mounting rod 11, which also limits the rotation of the reset spring 6 within the housing 1. This ensures that the free end of the reset spring 6 is stably held between the trigger rod 51 and the trigger switch to transmit force, thereby ensuring the stability of the steering wheel switch during use.

[0025] Furthermore, based on the above structure, a plurality of limiting slots 13 matching the width of the fixed end of the reset spring 6 are formed inside the housing 1. The fixed end of the reset spring 6 is inserted into the limiting slot 13. Through the action of the limiting slot 13, the rotation of the reset spring 6 inside the housing 1 is further limited, while the stability of the reset spring 6 after being connected to the housing 1 is enhanced.

[0026] Furthermore, based on the above structure, a plurality of first snap-fit ​​protrusions 14 are formed on the periphery of the housing 1, and a plurality of first snap-fit ​​holes 31 matching the first snap-fit ​​protrusions 14 are formed on the periphery of the cover plate 3. The first snap-fit ​​protrusions 14 are snapped into the first snap-fit ​​holes 31 to connect the cover plate 3 and the housing 1. A plurality of positioning rods 15 are formed inside the housing 1, and a plurality of positioning holes 42 matching the positioning rods 15 are provided on the circuit board 4. The positioning rods 15 pass through the positioning holes 42 to position the circuit board 4 inside the housing 1. A plurality of second snap-fit ​​protrusions 21 are formed on the periphery of the bottom plate 2, and a plurality of second snap-fit ​​protrusions 21 are provided on the periphery of the housing 1. The second snap-fit ​​hole 16 is matched with the second snap-fit ​​protrusion 21, which snaps into the second snap-fit ​​hole 16 to connect the base plate 2 and the housing 1. The base plate 2 presses the circuit board 4 tightly into the housing 1. The cover plate 3 is connected to the housing 1 through the cooperation of the first snap-fit ​​protrusion 14 and the first snap-fit ​​hole 31. The base plate 2 is connected to the housing 1 through the cooperation of the second snap-fit ​​protrusion 21 and the second snap-fit ​​hole 16. The circuit board 4 is positioned by the cooperation of the positioning rod 15 and the positioning hole 42 and is fixed in the housing 1 by the action of the base plate 2. This makes it easier to disassemble and assemble the cover plate 3, the housing 1, the base plate 2 and the circuit board 4, which is convenient for assembly operations during production and for repair and maintenance during subsequent use.

[0027] Furthermore, based on the above structure, a plurality of first positioning blocks 32 are formed on the periphery of the cover plate 3, and a plurality of first positioning grooves 17 matching the first positioning blocks 32 are formed on the periphery of the housing 1. When the cover plate 3 is connected to the housing 1, the first positioning blocks 32 are inserted into the first positioning grooves 17. A plurality of second positioning blocks 22 are formed on the periphery of the bottom plate 2, and a plurality of second positioning grooves 18 matching the second positioning blocks 22 are formed on the periphery of the housing 1. When the bottom plate 2 is connected to the housing 1, the second positioning blocks 22 are inserted into the second positioning grooves 18. The cooperation between the first positioning blocks 32 and the second positioning grooves 18 and the second positioning blocks 22 and the second positioning grooves 18 respectively plays a guiding and positioning role in the operation of connecting the cover plate 3 and the bottom plate 2 to the housing 1, which facilitates the operation of assembling the cover plate 3, the housing 1 and the bottom plate 2, and thus enhances the stability of the cover plate 3 and the bottom plate 2 after being connected to the housing 1.

[0028] Furthermore, based on the above structure, a plurality of abutting protrusions 23 are formed on the surface of the base plate 2 facing the circuit board 4. When the base plate 2 is connected to the housing 1, the abutting protrusions 23 abut against the circuit board 4, forming a cavity between the circuit board 4 and the base plate 2. The base plate 2 uses the abutting protrusions 23 to press and fix the circuit board 4 tightly inside the housing 1. The cavity formed between the circuit board 4 and the base plate 2 is conducive to heat dissipation of the circuit board 4 during operation, ensuring the stability of the steering wheel switch during operation.

[0029] Furthermore, based on the above structure, the housing 1 has a plurality of swing grooves 19, each located above a plurality of tactile switches 41 and matching the thickness of the trigger rod 51. The trigger rod 51 passes into the swing groove 19. When the trigger rod 51 is driven by the button 5, it remains swinging within the swing groove 19. The constraint of the trigger rod 51 by the swing groove 19 prevents the trigger rod 51 from deflecting outside the swing direction, and stably triggers the tactile switch 41 through the reset spring 6, ensuring the stability of the steering wheel switch when it is working.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steering wheel switch, comprising a housing (1), a base plate (2), a cover plate (3), and a circuit board (4), wherein a plurality of tactile switches (41) are disposed on the circuit board (4), and a plurality of buttons (5) are oscillatingly disposed on the housing (1), wherein each button (5) has a trigger rod (51) opposite to the tactile switches (41), characterized in that: The housing (1) contains a plurality of mounting rods (11) located on one side of a plurality of tactile switches (41). A reset spring (6) is snapped onto the mounting rod (11). The fixed end of the reset spring (6) has a mounting hole (61). The mounting rod (11) passes through the mounting hole (61) and is press-fitted with the mounting hole (61) to achieve the snap-fit ​​between the reset spring (6) and the mounting rod (11). The free end of the reset spring (6) is located between the trigger rod (51) and the tactile switch (41).

2. The steering wheel switch according to claim 1, characterized by: A limiting protrusion (12) is formed on the side of the mounting rod (11), and a limiting groove (62) matching the limiting protrusion (12) is formed on the inner wall of the mounting hole (61). The limiting protrusion (12) is inserted into the limiting groove (62).

3. The steering wheel switch according to claim 2, characterized in that: The housing (1) has a plurality of limiting slots (13) that match the width of the fixed end of the reset spring (6), and the fixed end of the reset spring (6) is inserted into the limiting slots (13).

4. The steering wheel switch of claim 1, wherein: The housing (1) has several first snap-fit ​​protrusions (14) formed on its peripheral side, and the cover plate (3) has several first snap-fit ​​holes (31) formed on its peripheral side that match the first snap-fit ​​protrusions (14). The first snap-fit ​​protrusions (14) are snapped into the first snap-fit ​​holes (31) to connect the cover plate (3) and the housing (1). The housing (1) has several positioning rods (15) formed inside, and the circuit board (4) has several positioning holes (42) that match the positioning rods (15). The rod (15) passes through the positioning hole (42) to realize the positioning of the circuit board (4) in the housing (1). Several second snap-fit ​​protrusions (21) are formed on the peripheral side of the base plate (2). Several second snap-fit ​​holes (16) matching the second snap-fit ​​protrusions (21) are opened on the peripheral side of the housing (1). The second snap-fit ​​protrusions (21) are snapped into the second snap-fit ​​holes (16) to realize the connection between the base plate (2) and the housing (1), so that the base plate (2) presses the circuit board (4) tightly in the housing (1).

5. The steering wheel switch according to claim 4, characterized in that: A plurality of first positioning blocks (32) are formed on the periphery of the cover plate (3), and a plurality of first positioning grooves (17) matching the first positioning blocks (32) are formed on the periphery of the housing (1). When the cover plate (3) is connected to the housing (1), the first positioning blocks (32) are inserted into the first positioning grooves (17). A plurality of second positioning blocks (22) are formed on the periphery of the bottom plate (2), and a plurality of second positioning grooves (18) matching the second positioning blocks (22) are formed on the periphery of the housing (1). When the bottom plate (2) is connected to the housing (1), the second positioning blocks (22) are inserted into the second positioning grooves (18).

6. The steering wheel switch of claim 5, wherein: The base plate (2) has several abutting protrusions (23) on the surface facing the circuit board (4). When the base plate (2) is connected to the housing (1), the abutting protrusions (23) abut against the circuit board (4) to form a cavity between the circuit board (4) and the base plate (2).

7. The steering wheel switch of claim 6, wherein: The shell (1) is formed with several swing grooves (19) above several light touch switches (41) and the thickness of trigger rods (51) matches.

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