Capacitive steering wheel limiting key

Abstract

The utility model relates to the technical field of automobile steering wheel keys, and discloses a capacitive steering wheel limit key, which comprises a panel, the back of which is provided with a capacitive film used for sensing touch signals of the panel; the suspension plate is mounted below the panel, and a pressure shaft and a plurality of limiting columns are arranged at the bottom of the suspension plate; the PCBA board is installed in the shell, a pressure chip is arranged at the position, corresponding to the bottom of the pressure shaft, of the PCBA board, and the pressure chip is used for sensing the downward pressing pressure of the pressure shaft, so that the key is prevented from being triggered when the panel is touched by mistake; a limiting groove is formed in the position, corresponding to the limiting column, of the shell, the limiting column penetrates through the middle of the limiting groove, a limiting ring is arranged on the side face of the limiting column located at the middle position, the limiting ring annularly protrudes downwards, the limiting ring and the limiting groove form a rigid limiting structure, and the limiting ring is used for achieving the rigid limiting effect during vertical downward pressing and inclined downward pressing. And the purposes of limiting the pressing distance of each key and protecting the chip are achieved by arranging a limiting column and a chip rubber cap.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering wheel buttons, in particular to a capacitive steering wheel limit button. Background Art

[0002] The multi-function keys on the car steering wheel have gradually evolved from traditional mechanical keys to more advanced touch panels or touch buttons. Touch panels allow multiple functions to be integrated in one area, replacing traditional mechanical keys, so more functions can be provided in a limited space. This helps to simplify the design of the steering wheel while improving the user experience. In order to improve the driver's perception of key operations, some touch panels use tactile feedback technology to simulate the feeling of mechanical keys through vibration or other means, providing a more intuitive user experience.

[0003] Capacitive steering wheel buttons are buttons that use capacitive sensing technology on the steering wheel of a car and are usually used to control electronic functions on the steering wheel, such as the audio system, navigation system, vehicle information display, etc. These buttons are usually touch-sensitive rather than traditional physical buttons. The working principle of these capacitive buttons is based on capacitive sensing technology. When the driver's finger touches the capacitive button on the steering wheel, the human body, as part of the capacitor, changes the capacitance of the area. This change in capacitance is sensed and interpreted as a touch input signal, triggering the relevant function or command. Compared with traditional mechanical buttons, capacitive buttons have no obvious physical moving parts. This helps to simplify the design of the steering wheel while reducing the possibility of mechanical wear and failure.

[0004] The existing capacitive steering wheel button limit structure is complex and cannot effectively adapt to button pressing in different directions. At the same time, due to the sensitive induction of the capacitive film, it is easy to cause false touches. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the utility model provides a capacitive steering wheel limit button, which has the advantages of preventing accidental touches and limiting the pressing distance of each button. It solves the problems that the pressure chip at the bottom of the button is easily damaged by the pressure shaft at the bottom of the button, the sensing is too sensitive and causes accidental touches, and the capacitive steering wheel button limit structure is complex and cannot effectively adapt to button pressing in different directions.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model provides the following technical solution: a capacitive steering wheel limit button, comprising:

[0009] A panel, with a capacitive film disposed on the back thereof, the capacitive film being used to sense a touch signal of the panel;

[0010] A suspension plate is installed below the panel and is suspended above the shell by setting a suspension rubber ring. A pressure shaft and a plurality of limit columns are set on the back of the suspension plate.

[0011] The PCBA board is installed inside the housing, and a pressure chip is provided at the position corresponding to the bottom of the pressure shaft. The pressure chip is used to sense the pressure of the pressure shaft. The capacitive film is activated only when the pressure chip senses sufficient pressure to avoid triggering the button when the panel is touched by mistake;

[0012] The suspension plate is also provided with a plurality of limit columns, and the shell is provided with limit grooves at positions corresponding to the limit columns, the limit column passes through the middle of the limit groove, and a limit ring is provided on the side of the limit column located at the middle position, the limit ring is in a ring shape and protrudes downward, the limit ring and the limit groove form a rigid limit structure, and the limit ring plays a rigid limit role when pressing vertically downward and tilting downward.

[0013] Preferably, the limiting ring is provided with a section at the bottom position, and the section is a horizontal plane, and the section is used to make the limiting ring fit more closely to the edge of the limiting groove when limiting, thereby reducing the rotation arc when pressing the limiting column on the side.

[0014] Preferably, a chip rubber cap is sleeved on the bottom of the pressure shaft, and the chip rubber cap is made of soft rubber and is used to protect the pressure chip. The chip rubber cap is fixedly sleeved on the bottom of the pressure shaft, and the chip rubber cap moves up and down with the pressure shaft. When the pressure shaft presses down on the pressure chip, the chip rubber cap provides an elastic variable, so that the force during the downward pressure is in an increasing state, thereby avoiding damage to the pressure chip due to a sudden increase in pressure.

[0015] Preferably, the aperture size of the limiting groove is larger than the size of the corresponding limiting column, so that the limiting column can rotate and press the button on the side when it is stuck in the limiting groove.

[0016] Preferably, the capacitive film is connected to the PCBA board, and the capacitive film detects the user's touch input on the panel through capacitive sensing, and converts the touch into an electrical signal and transmits it to the PCBA board, thereby improving the sensitivity of key pressing.

[0017] Preferably, the panel and the suspension board are connected by a plastic part connection method selected from the group consisting of snap connection, infrared welding and ultrasonic welding.

[0018] Preferably, a motor is provided on the PCBA board, and a chip on the PCBA board is connected to control the motor, and the motor is used to provide vibration feedback and sound feedback when a key is triggered, that is, when the pressure chip senses sufficient pressure.

[0019] Preferably, a plurality of suspension rubber rings are provided on the shell, and convex ribs are provided at the upper and lower ends of each suspension rubber ring to be fixed on the rubber ring mounting hole in the shell, and a rubber ring top column is provided on the suspension board at a position corresponding to the suspension rubber ring, and the rubber ring top column passes through the suspension rubber ring and is fixed to the bottom by screws, and each suspension rubber ring and the corresponding rubber ring top column form an elastic limiting structure, which is used to provide an elastic limiting effect when the panel and the suspension board are pressed downward.

[0020] Preferably, the motor is a voice coil motor, and the chip on the PCBA board can control the motor to output different levels of vibration, and the vibration frequency and amplitude of the motor can produce different sound effects.

[0021] Preferably, the panel, suspension board, shell and base are all made of hard plastic.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a capacitive steering wheel limit button, which has the following beneficial effects:

[0024] 1. The capacitive steering wheel limit button has a limit column on the back of the suspension board and a limit ring on the side of the limit column. When pressing down, the limit ring cooperates with the edge of the limit groove to form a rigid limit structure, which can effectively avoid damage to the pressure chip due to excessive pressing distance. At the same time, the limit column side where the limit ring is set in the middle position can provide limit in the tilt direction when the button body on the side is pressed down.

[0025] 2. The capacitive steering wheel limit button is provided with a pressure shaft on the back of the suspension board, and a chip rubber cap is sleeved on the pressure shaft. When the panel is pressed down, the pressure shaft will be pressed down, so that the pressure shaft is pressed against the pressure chip. The chip rubber cap can protect the pressure chip. At the same time, the chip rubber cap provides an elastic variable for the downward pressure of the pressure shaft, so that the pressure on the pressure chip is gradually increased, avoiding accidental touch while preventing damage to the pressure chip due to excessive pressure.

[0026] 3. The capacitive steering wheel limit button sets a cut surface at the bottom of the limit ring so that the cut surface is attached to the edge of the limit groove when the limit ring is pressed vertically. When the limit column is tilted and pressed down, the cut surface can reduce the overall tilt of the panel and improve the user experience.

[0027] 4. The capacitive steering wheel limit button provides vibration feedback and sound feedback when the button is triggered by connecting the control motor on the PCBA board. In order to further remind the user, the motor is a voice coil motor. The chip on the PCBA board can control the motor to output different levels of vibration. The vibration frequency and amplitude of the motor can produce different sound effects to improve feedback efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an exploded view of the capacitive steering wheel limit button structure of the utility model.

[0029] Figure 2 This is a front view of the capacitive steering wheel limit button of the utility model.

[0030] Figure 3 This is a capacitive steering wheel limit button of the utility model Figure 2 Middle AA section view.

[0031] Figure 4 This is a front view of the capacitive steering wheel limit button of the utility model.

[0032] Figure 5 This is a capacitive steering wheel limit button of the utility model Figure 4 Middle BB cross-section.

[0033] Figure 6 This is a capacitive steering wheel limit button of the utility model Figure 3 Enlarged view of the structure of the middle C region.

[0034] Figure 7 This is a capacitive steering wheel limit button of the utility model Figure 3 A magnified view of the structure in region D.

[0035] In the figure: 11, panel; 12, capacitor film; 13, suspension board; 14, shell; 15, PCBA board; 16, base; 17, motor; 151, pressure chip; 111, button body;

[0036] 2. Rubber cap for chip;

[0037] 31. Limiting column; 32. Limiting ring; 33. Pressure shaft; 321. Section; 34. Limiting groove;

[0038] 41. Suspended rubber ring; 42. Rubber ring top column; 43. Rubber ring mounting hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Embodiment 1:

[0041] This embodiment provides a capacitive steering wheel limit button having the following technical features.

[0042] See also Figure 1-7 , a capacitive steering wheel limit button, comprising:

[0043] The panel 11 has a capacitive film 12 on the back thereof, and a plurality of button bodies 111 are arranged on the panel 11. The capacitive film 12 is used to sense a touch signal when the button body 111 is pressed;

[0044] The suspension board 13 is installed at the middle position below the panel 11. The suspension board 13 is suspended above the shell 14 by setting suspension rubber rings 41 at four corners of the shell 14. The pressure shaft 33 is set on the back of the suspension board 13.

[0045] The PCBA board 15 is installed inside the shell 14, and a pressure chip 151 is set at a position corresponding to the bottom of the pressure shaft 33. The pressure chip 151 is used to sense the pressure of the pressure shaft 33 pressing down. The capacitive film 12 is only started when the pressure chip 151 senses sufficient pressure to avoid triggering the button when accidentally touching the panel 11.

[0046] Furthermore, a plurality of limit posts 31 are provided on the suspension plate 13, and a limit groove 34 is provided on the shell 14 at a position corresponding to the limit post 31, and the limit post 31 passes through the middle of the limit groove 34, and a limit ring 32 is provided on the side of the limit post 31 located at the middle position, and the limit ring 32 is annular and protrudes downward, and the limit ring 32 and the limit groove 34 form a rigid limit structure, and the limit ring 32 plays a rigid limit role when pressing vertically downward and tilting downward.

[0047] Through the above technical solution, when the panel 11 is pressed downward, the limiting column 31 on the bottom suspension plate 13 will be pressed downward, so that the pressure shaft 33 is pressed against the pressure chip 151. The chip rubber cap 2 between the pressure chip 151 and the pressure shaft 33 can protect the pressure chip 151. At the same time, the chip rubber cap 2 provides an elastic variable for the downward pressure of the pressure shaft 33, so that the pressure on the pressure chip 151 is gradually increasing, avoiding accidental touch while preventing damage to the pressure chip 151 due to excessive pressure.

[0048] Through the above technical scheme, the limiting ring 32 arranged on the side of the limiting column 31 cooperates with the edge of the limiting groove 34 when pressed down to form a rigid limiting structure, which can effectively prevent the pressure chip 151 from being damaged due to excessive pressing distance. At the same time, the side of the limiting column 31 where the limiting ring 32 is arranged in the middle position can provide limitation in the inclined direction when the button body 111 on the side is pressed down.

[0049] Further, in order to improve the comfort of key pressing, Figure 7As shown, the limiting ring 32 is provided with a cut surface 321 at the bottom surface, and the cut surface 321 is a cut surface of a horizontal plane. The cut surface 321 is used to make the limiting ring 32 fit more closely to the edge of the limiting groove 34 when limiting, thereby reducing the rotation arc when pressing the limiting column 31 on the side.

[0050] Through the above technical solution, a cut surface 321 is set at the bottom of the limit ring 32, so that when the limit ring 32 is pressed vertically downward, the cut surface 321 is attached to the edge of the limit groove 34. When the limit column 31 is tilted downward, the cut surface 321 can reduce the overall tilt curvature of the panel 11, thereby improving the user experience.

[0051] Further settings, such as Figure 6 As shown, a chip rubber cap 2 is sleeved on the bottom of the pressure shaft 33 . The chip rubber cap 2 is made of soft rubber and is used to protect the pressure chip 151 . The chip rubber cap 2 is fixedly sleeved on the bottom of the pressure shaft 33 , and the chip rubber cap 2 moves up and down with the pressure shaft 33 .

[0052] Through the above technical solution, when the pressure shaft 33 presses down the pressure chip 151, the chip rubber cap 2 provides an elastic variable, so that the force during the pressing is in an increasing state, thereby preventing the pressure chip 151 from being damaged due to a sudden increase in pressure.

[0053] It is further provided that when the key body 111 at the edge position is pressed, the limit post 31 can be tilted and pressed down, such as Figure 3 As shown, the inner diameter of the limiting groove 34 is larger than the corresponding size of the limiting column 31. Through the above technical solution, the limiting column 31 can rotate and press the button on the side when it is stuck in the limiting groove 34.

[0054] Further, in order to improve the sensitivity of touch pressing, such as Figure 1 As shown, a capacitive film 12 is provided between the panel 11 and the suspension board 13. Through the above technical solution, the capacitive film 12 detects the user's touch input through capacitive sensing and converts the touch into an electrical signal, thereby improving the sensitivity of key pressing.

[0055] Embodiment 2:

[0056] This embodiment provides a capacitive steering wheel limit button, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0057] This embodiment provides a connection method between various components of the capacitive steering wheel limit button housing.

[0058] As an example, Figure 1 As shown, the panel 11 , the suspension board 13 , the housing 14 and the base 16 are all made of hard plastic.

[0059] It is further provided that the connection method between the panel 11 and the suspension plate 13 is a plastic part connection method of at least one of snap connection, threaded connection, infrared welding, ultrasonic welding, adhesive connection, double-sided tape connection, hot melt welding, clamping connection, clamping connection, plug-in connection and extrusion connection.

[0060] Specifically, the snap connection uses specially designed protrusions and grooves to make plastic parts easily inserted and removed; welding is a process in which plastic parts are heated to the melting point and then cooled to bond them together with other plastic parts. There are many types of welding, such as ultrasonic welding, hot plate welding, and infrared welding; the clamping connection is achieved by designing protrusions and grooves so that two plastic parts can fit together; the plug-in connection is achieved by designing the shape so that one plastic part is inserted into another plastic part to form a connection; the extrusion connection uses extrusion force to connect two plastic parts together, which is suitable for connection requirements of some special shapes.

[0061] It is further provided that the housing 14 and the base 16 are fixed by means of a snap connection and a threaded connection.

[0062] It is further provided that the PCBA board 15 is fixed between the housing 14 and the base 16 by means of a threaded connection.

[0063] Through the above technical solution, the panel 11, the capacitive film 12, the suspension board 13, the shell 14, the PCBA board 15 and the base 16 on the capacitive steering wheel limit button are connected together.

[0064] Embodiment three:

[0065] This embodiment provides a capacitive steering wheel limit button, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] This embodiment is intended to solve the problem that there is no feedback when pressing a key, resulting in the user being unable to determine whether the pressing action has been completed.

[0067] As an example, Figure 1 As shown, a motor 17 is provided on the PCBA board 15, and a chip on the PCBA board 15 is connected to control the motor 17. Through the above technical solution, the motor 17 is used to provide vibration feedback and sound feedback when a key is triggered.

[0068] It is further configured that, in order to further remind the user, the motor 17 is a voice coil motor, and the chip on the PCBA board 15 can control the motor 17 to output different levels of vibration. The vibration frequency and amplitude of the motor 17 can produce different sound effects, thereby improving the feedback efficiency.

[0069] Embodiment 4:

[0070] This embodiment provides a capacitive steering wheel limit button, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0071] In order to achieve elastic reset function when pressed, this embodiment provides the following technical solution.

[0072] As an example, Figure 1 and Figure 5 As shown, a plurality of suspension rubber rings 41 are further provided on the shell 14, and convex ribs are provided at the upper and lower ends of each suspension rubber ring 41 to be fixed on the rubber ring mounting hole 43 in the shell 14, and a rubber ring top column 42 is provided at the position corresponding to the suspension rubber ring 41 of the suspension plate 13, and the rubber ring top column 42 passes through the suspension rubber ring 41 and is fixed to the bottom by screws.

[0073] Through the above technical solution, each suspended rubber ring 41 and the corresponding rubber ring top column 42 form an elastic limiting structure, which is used to provide an elastic limiting effect when the panel 11 is pressed downward.

[0074] Working principle: the panel 11 and the suspension board 13 are fixed together by ultrasonic welding or other plastic parts connection methods. When the button body 111 on the panel 11 is pressed down, the panel 11 and the suspension board 13 are pressed down synchronously, so that the pressure shaft 33 under the suspension board 13 presses down the corresponding pressure chip 151. When the pressure sensed by the pressure chip 151 exceeds the preset value, the capacitive film 12 is started to collect the touch signal on the panel 11 to avoid errors. The chip rubber cap 2 is sleeved on the pressure shaft 33 to protect the pressure chip 151 and provide elastic variables. A ring-shaped downwardly protruding limit ring 32 is set on the side of the limit column 31 in the middle position, and a cut surface 321 is set at the bottom of the limit ring 32 to provide rigid limit during vertical and inclined pressure.

[0075] To sum up, the capacitive steering wheel limit button, by setting a limit column 31 at the bottom of the suspension plate 13, and setting a limit ring 32 on the side of the limit column 31, a rigid limit structure is formed by the limit ring 32 and the edge of the limit groove 34 when pressing down, which can effectively avoid the pressure chip 151 from being damaged due to excessive pressing distance. At the same time, the side of the limit column 31 where the limit ring 32 is set in the middle position can provide a limit in the tilt direction when the button body 111 on the side is pressed down.

[0076] The capacitive steering wheel limit button is configured by arranging a pressure shaft 33 at the bottom of the suspension board 13, and sleeved with a chip rubber cap 2 on the pressure shaft 33. When the panel 11 is pressed down, the pressure shaft 33 is pressed down, so that the pressure shaft 33 is pressed against the pressure chip 151. The chip rubber cap 2 can protect the pressure chip 151. At the same time, the chip rubber cap 2 provides an elastic variable for the downward pressure of the pressure shaft 33, so that the pressure on the pressure chip 151 is gradually increased, avoiding accidental touch while preventing damage to the pressure chip 151 due to excessive pressure.

[0077] The capacitive steering wheel limit button is configured with a cut surface 321 at the bottom of the limit ring 32 so that when the limit ring 32 is pressed vertically downward, the cut surface 321 is attached to the edge of the limit groove 34. When the limit column 31 is tilted downward, the cut surface 321 can reduce the overall tilt curvature of the panel 11, thereby improving the user experience.

[0078] The capacitive steering wheel limit button provides vibration feedback and sound feedback when the button is triggered by connecting a control motor 17 on the PCBA board 15. In order to further remind the user, the motor 17 is a voice coil motor. The chip on the PCBA board 15 can control the motor 17 to output different levels of vibration. The vibration frequency and amplitude of the motor 17 can produce different sound effects, thereby improving feedback efficiency.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A capacitive steering wheel limit button, characterized in that: include: A panel (11) having a capacitive film (12) disposed on the back thereof, wherein the capacitive film (12) is used to sense a touch signal of the panel (11); A suspension plate (13) is installed below the panel (11) and is suspended above the housing (14) by means of a suspension rubber ring (41); a pressure shaft (33) and a plurality of limit columns (31) are provided on the back of the suspension plate (13); The PCBA board (15) is installed inside the housing (14), and a pressure chip (151) is provided at a position corresponding to the bottom of the pressure shaft (33). The pressure chip (151) is used to sense the pressure of the pressure shaft (33) pressing down. The capacitive film (12) is activated only when the pressure chip (151) senses sufficient pressure, so as to avoid triggering a key when the panel (11) is touched by mistake; The suspension plate (13) is further provided with a plurality of limit posts (31); the housing (14) is provided with limit slots (34) at positions corresponding to the limit posts (31); the limit posts (31) pass through the middle of the limit slots (34); a limit ring (32) is provided on the side of the limit post (31) at the middle position; the limit ring (32) is annular and protrudes downward; the limit ring (32) and the limit slot (34) form a rigid limit structure; the limit ring (32) is used to play a rigid limit role when pressing vertically downward and tilting downward.

2. A capacitive steering wheel limit button according to claim 1, characterized in that: The limiting ring (32) is provided with a cut surface (321) at the bottom position, the cut surface (321) being a horizontal plane, and the cut surface (321) is used to make the limiting ring (32) more closely fit the edge of the limiting groove (34) when limiting, thereby reducing the rotation arc when pressing the limiting column (31) on the side.

3. The capacitive steering wheel limit button according to claim 1, characterized in that: The bottom of the pressure shaft (33) is sleeved with a chip rubber cap (2), the chip rubber cap (2) is made of soft rubber material and is used to protect the pressure chip (151). The chip rubber cap (2) is fixedly sleeved on the bottom of the pressure shaft (33), and the chip rubber cap (2) moves up and down following the pressure shaft (33). When the pressure shaft (33) presses down the pressure chip (151), the chip rubber cap (2) provides an elastic variable, so that the force during the downward pressure is in an increasing state, thereby reducing false touches and avoiding damage to the pressure chip (151) caused by a sudden increase in pressure.

4. The capacitive steering wheel limit button according to claim 1, characterized in that: The inner diameter of the limiting groove (34) is larger than the size of the corresponding limiting column (31), so that the limiting column (31) can rotate and press the button on the side when it is stuck in the limiting groove (34).

5. The capacitive steering wheel limit button according to claim 1, characterized in that: The capacitive film (12) is connected to the PCBA board (15), and the capacitive film (12) detects the touch input of the user on the panel (11) through capacitive sensing, and converts the touch into an electrical signal and transmits it to the PCBA board (15), thereby improving the sensitivity of key pressing.

6. The capacitive steering wheel limit button according to claim 1, characterized in that: The connection method between the panel (11) and the suspension plate (13) is a plastic parts connection method of one of snap connection, infrared welding and ultrasonic welding.

7. The capacitive steering wheel limit button according to claim 1, characterized in that: A motor (17) is provided on the PCBA board (15), and a chip on the PCBA board (15) is connected to control the motor (17). The motor (17) is used to provide vibration feedback and sound feedback when a key is triggered, that is, when the pressure chip (151) senses sufficient pressure.

8. The capacitive steering wheel limit button according to claim 1, characterized in that: The shell (14) is provided with a plurality of suspension rubber rings (41), and each suspension rubber ring (41) is provided with convex ribs at both ends thereof so as to be fixed to a rubber ring mounting hole (43) in the shell (14). The suspension plate (13) is provided with a rubber ring top column (42) at a position corresponding to the suspension rubber ring (41), and the rubber ring top column (42) passes through the suspension rubber ring (41) and is fixed to the bottom by screws. Each suspension rubber ring (41) and the corresponding rubber ring top column (42) form an elastic limiting structure for providing an elastic limiting effect when the panel (11) and the suspension plate (13) are pressed downward.

9. The capacitive steering wheel limit button according to claim 7, characterized in that: The motor (17) is a voice coil motor, and the chip on the PCBA board (15) can control the motor (17) to output different levels of vibration, and the vibration frequency and amplitude of the motor (17) can produce different sound effects.

10. A capacitive steering wheel limit button according to any one of claims 1-9, characterized in that: The panel (11), the suspension board (13), the shell (14) and the base (16) are all made of hard plastic.

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