Automotive Switch Multifunction Expansion System

Abstract

This system provides a multi-functional automotive switch expansion system that allows for more flexible and convenient operation of vehicle functions by maintaining existing switch functions while expanding the range of switch operations, enabling the simulation and addition of other function switches. [Solution] The automotive switch multifunction expansion system includes a main control MCU module, first to third in-vehicle switch units, first to third signal detection units, first to third switch control units, an in-vehicle switch signal unit, and a power management unit. The first in-vehicle switch unit transmits a switch command to the main control MCU module via the first signal detection unit and the first switch control unit, and the main control MCU module also transmits the processed switch command to the third in-vehicle switch unit via the third switch control unit and the third signal detection unit.

Description

【Technical Field】 【0001】 The present invention relates to the field of automotive switch control technology, and particularly to an automotive switch multi-functional expansion system. 【Background Art】 【0002】 Currently, the switches on the steering wheel and console of automobiles (generally, there are switches such as up, down, left, right, confirm, exit, cruise, S+, S-, volume +, volume -, phone, hazard lamp, start stop, parking, etc.) are mainly arranged close to the main driver's seat. However, in recent years, as the functions of automobiles have become more diverse, an increasing number of switches are required to control or turn on and off these functions. As a result, some function switches are far from the driver's seat, making it difficult to operate them during driving. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0003】 While the driver is driving the vehicle, in order to ensure driving safety, it is necessary to minimize the driver's body movement and prevent the driver from controlling switches far away by diverting the line of sight. It is safest for the driver to control the steering wheel or the switch closest to the steering wheel. However, the functions of the switch on the steering wheel or the switch closest to the steering wheel are either fixed or limited. 【0004】 Therefore, it is necessary to expand the functions of these switches, that is, to expand multiple switch operations (such as double click, multi click, long press, etc.) while maintaining the existing functions, so as to simulate or add other function switches, or to simulate the functional operation of in-vehicle switches according to some external switches. 【Means for Solving the Problems】 【0005】 Therefore, the main objective of the present invention is to provide a vehicle switch function extension that enables the simulation and addition of other function switches by expanding various switch operations while retaining existing switch functions, thereby realizing a vehicle switch multi-function extension system that allows for more flexible operation and more convenient use of vehicle functions. 【0006】 To achieve the object of the invention described above, the present invention provides an automotive switch multifunction expansion system comprising a main control MCU module, a first in-vehicle switch unit, a second in-vehicle switch unit, a third in-vehicle switch unit, a first signal detection unit, a second signal detection unit, a third signal detection unit, a first switch control unit, a second switch control unit, a third switch control unit, an in-vehicle switch signal unit, and a power management unit. The main control MCU module processes switch state information and transmits switch operation commands; the in-vehicle switch unit outputs switch commands; the signal detection unit detects switch state information; the switch control unit controls the switch command signals; the in-vehicle switch signal unit processes in-vehicle switch unit signal information; and the power management unit supplies power to the main control MCU module. The first in-vehicle switch unit transmits a switch command to the main control MCU module via the first signal detection unit and the first switch control unit, and the third signal detection unit transmits a switch command to the main control MCU module via the third switch control unit. The proposed automotive switch multi-function expansion system is characterized in that the main control MCU module transmits the processed switch commands to the second in-vehicle switch unit via the second switch control unit and the second signal detection unit, and the main control MCU module also transmits the processed switch commands to the third in-vehicle switch unit via the third switch control unit and the third signal detection unit. 【0007】 The aforementioned main control MCU module is a chip with the model number MM32F0010A1T. 【0008】 The third in-vehicle switch unit includes a cruise control switch unit, a collision warning switch unit, and a lane offset switch unit. 【0009】 The present invention further includes a fourth in-vehicle switch unit comprising a fourth signal detection unit and a fourth switch control unit, wherein the main control MCU module transmits the processed command signals to the fourth in-vehicle switch unit via the fourth signal detection unit and the fourth switch control unit. 【0010】 The main control MCU module includes a voice recognition command unit for converting voice signals into command signals. 【0011】 The voice command recognition unit includes a digital-to-analog conversion unit for converting digital signals into analog signals. 【0012】 The main control MCU module includes a gesture recognition command processing unit for converting gesture signals into command signals. 【0013】 The gesture recognition command processing unit includes a gesture sensor and a gesture motion analysis unit, and the gesture sensor transmits gesture information to the gesture recognition command processing unit via the gesture motion analysis unit. 【0014】 The aforementioned main control MCU module includes a wireless transmitter and receiver. 【0015】 The beneficial effects of the technical solution provided by the present invention are as follows: 1) The third in-vehicle switch unit of the present invention transmits a switch command to the main control MCU module, which processes the received switch command and then, using the third switch control unit, simulates the corresponding switch operation and transmits it to the in-vehicle switch signal unit, or transmits it to the first and second in-vehicle switch control units respectively to simulate the corresponding switch operation, thereby expanding the vehicle's switch functions and enabling the simulation and addition of switches for other functions, allowing for more flexible and convenient operation of the vehicle's functions. 2) The present invention has a rational and low-cost circuit configuration. 3) The present invention has diverse functions, high reliability, and is suitable for general adoption. [Brief explanation of the drawing] 【0016】 To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that may be used in the description of the embodiments or the prior art are briefly described below. The drawings in the following description represent only some embodiments of the present invention, and it will be obvious to those skilled in the art that other drawings can be obtained from the structures shown in these drawings without any creative effort. [Figure 1] This is a system block diagram of a multi-functional expansion system for an automobile switch according to an embodiment of the present invention. [Figure 2] This is another system block diagram of the automotive switch multi-function expansion system according to an embodiment of the present invention. [Figure 3] This is an electronic circuit diagram of the main control MCU module of an automotive switch multifunction expansion system according to an embodiment of the present invention. [Figure 4] This is an electronic circuit diagram of a power management unit for a multi-functional expansion system for an automobile switch according to an embodiment of the present invention. [Figure 5] This is an electronic circuit diagram of the first signal detection unit of the automotive switch multi-function expansion system according to an embodiment of the present invention. [Figure 6] This is an electronic circuit diagram of the second switch control unit of the automotive switch multi-function expansion system according to an embodiment of the present invention. [Figure 7] This is an electronic circuit diagram of the third signal detection unit of the automotive switch multi-function expansion system according to an embodiment of the present invention. [Figure 8] This is an electronic circuit diagram of the third switch control unit of the automotive switch multi-function expansion system according to an embodiment of the present invention. [Figure 9] This is an electronic circuit diagram of the fourth signal detection unit of the automotive switch multi-function expansion system according to an embodiment of the present invention. [Figure 10] This is an electronic circuit diagram of the third switch control unit of the automotive switch multi-function expansion system according to an embodiment of the present invention. [ 【Embodiments for Carrying Out the Invention】 【0017】 The achievement of the object, functional features, and advantages of the present invention will be further described in connection with the accompanying drawings in relation to the embodiments. 【0018】 Hereinafter, the technical solution means in the embodiments of the present invention will be clearly and completely described in connection with the accompanying drawings. It is clear that the described embodiments are only some of the embodiments of the present invention and not all of them. Based on the embodiments of the present invention, all other embodiments obtained on the premise that those skilled in the art do not perform creative labor are within the scope of protection of the present invention. 【0019】 In addition, all directional indications (for example, up, down, left, right, front, rear, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement status between each component in a specific posture (shown in the drawings). When the specific posture changes, the directional indication also changes accordingly. 【0020】 In this invention, unless otherwise explicitly stated or limited, terms such as “connection” and “fixed” shall be understood in general terms. For example, unless otherwise explicitly limited, “fixed” may be a fixed connection, a detachable connection, or an integrated connection; it may be a mechanical connection or an electrical connection; it may be connected directly or indirectly through an intermediate medium; it may be an internal communication between two elements or an interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in the invention depending on the context. 【0021】 Furthermore, the terms "first," "second," etc., in this invention are used solely for explanatory purposes and are not intended to indicate or imply their relative importance or the number of technical features described. Thus, features limited to "first," "second," etc., may explicitly or implicitly include at least one such feature. In addition, while the technical solutions between each embodiment can be combined, this must be based on what a person skilled in the art can achieve. If the combination of technical solutions results in a contradiction or is not feasible, such a combination of technical solutions should be considered nonexistent and is not included in the scope of protection required by this invention. 【0022】 This invention proposes a multi-functional expansion system for automotive switches. 【0023】 Referring to Figures 1 to 10, in one embodiment of the present invention, the automotive switch multifunction expansion system includes a main control MCU module 10, a first in-vehicle switch unit 20, a second in-vehicle switch unit 30, a third in-vehicle switch unit 40, a first signal detection unit 21, a second signal detection unit 31, a third signal detection unit 41, a first switch control unit 22, a second switch control unit 32, a third switch control unit 42, an in-vehicle switch signal unit 50, and a power management unit 101. The main control MCU module 10 processes switch state information and transmits switch operation commands; the in-vehicle switch unit outputs switch commands; the signal detection unit detects switch state information; the switch control unit controls the switch command signals; the in-vehicle switch signal unit 50 processes in-vehicle switch signal information; and the power management unit 101 supplies power to the main control MCU module. The first in-vehicle switch unit 20 transmits a switch command to the main control MCU module 10 via the first signal detection unit 21 and the first switch control unit 22, and the third signal detection unit 41 transmits a switch command to the main control MCU module 10 via the third switch control unit 42. The main control MCU module 10 transmits the processed switch command to the second in-vehicle switch unit via the second switch control unit 32 and the second signal detection unit 31, and the main control MCU module 10 also transmits the processed switch command to the third in-vehicle switch unit 40 via the third switch control unit 42 and the third signal detection unit 41. 【0024】 In this embodiment, the main control MCU module is preferably a chip with model number MM32F0010A1T. 【0025】 In this embodiment, the first on-board switch unit 20 includes a steering wheel OK switch, and the first on-board switch unit 20 is connected to the signal line KEY-1a. The voltage when the first on-board switch unit 20 is open is 12V, and the voltage when the switch is pressed is 0V. 【0026】 The first signal detection unit 21 is connected to the first in-vehicle switch unit via the signal line KEY-1A and can detect voltage changes on the signal line KEY-1A. 【0027】 The second in-vehicle switch unit 30 includes a hazard lamp switch, which is operated in click mode. One click turns the hazard lamps on, and another click turns them off. The main control MCU module 10 can control the on / off state of the hazard lamps by controlling the second in-vehicle switch unit 30 to simulate the click operation. 【0028】 Referring to Figures 1 and 2, the first in-vehicle switch unit 20 is connected to the in-vehicle switch signal unit 50 and the first signal detection unit 20 by a single signal line. The system determines whether the switch is pressed or released by detecting the high or low state of the signal line voltage, and when the automotive switch signal receiving module detects a low-level voltage, it determines that the switch has been pressed. 【0029】 In this embodiment, the present invention defines that the hazard lights are operated when a double-click of the steering wheel OK switch is detected. In this embodiment, the first in-vehicle switch unit 20 detects a change in switch operation, and when it detects an operation such as a click, the main control MCU module 10 does not perform any processing. When it detects a hazard lamp operation, the signal line KEY-2A that controls the hazard lamps via the second in-vehicle switch unit 30 is set to a low level for 250ms, thereby simulating a click operation of the second in-vehicle switch unit 30, which is a hazard lamp switch. 【0030】 In this embodiment, the third in-vehicle switch unit 40 preferably includes a cruise control switch unit 401, a collision warning switch unit 402, and a lane offset switch unit 403. 【0031】 The third in-vehicle switch unit 40 shares a single signal line with the in-vehicle switch signal processing unit 50 and the third signal detection unit 41. It has a voltage divider circuit consisting of multiple resistors inside the three switches: the cruise control switch unit 401, the collision warning switch unit 402, and the lane offset switch unit 403. By assigning a resistor with a different resistance value to each switch, it outputs different voltages to the signal line, and the automotive switch signal receiving module determines the type of single switch that was pressed based on the different voltages detected. 【0032】 The main control module 10 transmits command signals to the cruise control switch unit 401, the collision warning switch unit 402, and the lane offset switch unit 403, respectively, via the third switch control unit 42 and the third signal detection unit 41. 【0033】 In this embodiment, the cruise control switch unit 401 is connected to the third signal detection unit 41 via signal line KEY-3A-1, the collision warning switch unit 402 is connected to the third signal detection unit 41 via signal line KEY-3A-2, and the lane offset switch unit 403 is connected to the third signal detection unit 41 via signal line KEY-3A-3. The cruise control switch unit 401, the collision warning switch unit 402, and the lane offset switch unit 403 can share one signal line KEY-3B. When the third in-vehicle switch unit 40 is used, the cruise control switch unit 401, the collision warning switch unit 402, and the lane offset switch unit 403 have voltages of 0V, 1.5V, and 3.5V, respectively. The normal operation of the cruise control switch unit 401, collision warning switch unit 402, and lane offset switch unit 403 is by clicking. For example, the cruise control switch unit 401 can be used to switch its function on or off. If there is no corresponding function when double-clicking, multi-clicking, or long-pressing the cruise control switch unit 401, other operations can be assigned to other functions. For example, clicking the cruise control switch unit 401 retains the on / off status of the original function, double-clicking sets the hazard lights function to on, and multi-clicking sets the motion mode to on. 【0034】 In this embodiment, the present invention defines that when a double-click of the cruise control switch unit 401 is detected, the hazard lights will be activated, and when a multi-click is detected, the motion mode will be turned on or off. 【0035】 In the present invention, when it is necessary to realize the above-mentioned functional enhancements, the main control MCU module 10 controls them, and these functions are realized by the third signal detection unit 41 and the third switch control unit 42. 【0036】 First, the third signal detection unit 41 and the third switch control unit 42 consist of two parts: signal detection and signal simulation. The signal lines KEY-3A-1 of the existing cruise control switch unit 401, KEY-3A-2 of the collision warning switch unit 402, and KEY-3A-3 of the lane offset switch unit 403 are disconnected from the signal line KEY-3B and connected to the third signal detection unit 41, respectively. The third signal detection unit 41 is for detecting the operation of the signal lines KEY-3A-1 of the cruise control switch unit 401, KEY-3A-2 of the collision warning switch unit 402, KEY-3A-3 of the lane offset switch unit 403, and KEY-3B. The third switch control unit 42 is for restoring the operation corresponding to the switches of the signal lines KEY-3A-1 of the cruise control switch unit 401, KEY-3A-2 of the collision warning switch unit 402, and KEY-3B. 【0037】 For example, if the third signal detection unit 41 detects a voltage of 0V and is clicked, it is determined that this switch is the signal line KEY-3A-1 of the cruise control switch unit 401. If the operation is a normal function switch operation, a click operation is required to output and transfer the voltage of 0V via the third switch control unit 42. If the third signal detection unit 41 detects a voltage of 0V and is double-clicked, it is determined that this switch is the signal line KEY-3A-1 of the cruise control switch unit 401. However, since this is a double-click operation, no transfer is required here. However, the main control MCU module 10 defines the double-click operation of the cruise control switch unit 401 as an operation to control the hazard lights, so in this case, the hazard lights operation is required. 【0038】 The second in-vehicle switch unit 30 includes a hazard lamp switch, which is operated in click mode. One click turns the hazard lamps on, and another click turns them off. The main control MCU module 10 can control the on / off state of the hazard lamps by controlling the second in-vehicle switch unit 30 to simulate the click operation. 【0039】 In this embodiment, the present invention further includes a fourth in-vehicle switch unit 80 comprising a fourth signal detection unit 81 and a fourth switch control unit 82, wherein the main control MCU module 10 preferably transmits the processed instruction signals to the fourth in-vehicle switch unit 80 via the fourth switch control unit 82 and the fourth signal detection unit 81. 【0040】 In this embodiment, the main control MCU module 10 can also transmit the processed signal commands to the in-vehicle switch signal processing unit 50 via the fourth switch control unit 82 and the fourth signal detection unit 81. 【0041】 In this embodiment, the automobile switch of the present invention includes, for example, a start-stop switch, which switches between two states, being turned on when pressed once and turned off when pressed again. In this case, the fourth switch control unit 82 and the fourth signal detection unit 81 can be used. The voltage when the start-stop switch is released is 12V, and the voltage when the switch is pressed is 0V. 【0042】 In this embodiment, the main control MCU module 10 connects the command signal to the signal line KEY-4A via the fourth switch control unit 82 and the fourth signal detection unit 81 to detect voltage changes on the signal line KEY-4A, and the fourth signal detection unit 81 is connected to the signal line KEY-4B. 【0043】 In this embodiment, the present invention defines that the hazard lights are operated when a double-click of the start / stop switch is detected. 【0044】 The fourth signal detection unit 81 detects changes in the operation of the switch signal line KEY-4A. If a click operation is detected, the main control MCU module 10 controls the signal line KEY-4B to output a low level for the same duration through analog unit control in the fourth switch control unit 82 and the fourth signal detection unit 81, that is, it simulates a click operation for the same duration. If a double-click operation is detected, the host filters this operation event and, instead of controlling the signal line KEY-4B, uses the second signal detection unit 31 to control the hazard lamp signal line KEY-2A to generate a low level for 250ms, thereby simulating a click operation of the second on-board switch unit 30 of the hazard lamp switch. 【0045】 Referring to Figures 1 and 2, in this embodiment, it is preferable that the main control MCU module 10 includes a voice command recognition unit 52 for converting voice signals into command signals. 【0046】 In this embodiment, it is preferable that the voice command recognition unit 52 is a chip with model number LU-ASR01. 【0047】 In this embodiment, more preferably, the voice command recognition unit 52 includes a digital-to-analog conversion unit 51 for converting a digital signal to an analog signal. 【0048】 In this embodiment, the digital-to-analog conversion unit 51 is preferably a chip with the model number PCM5102A. 【0049】 In this embodiment, the present invention can control the main control MCU module 10 via an audio signal and transmit commands. The present invention uses an external microphone 50 and transmits audio information to an audio command recognition unit 52 via a digital-to-analog conversion unit 51. The audio command recognition unit 52 converts the audio information into command information and controls the main control module. 【0050】 In addition to in-vehicle switches, the present invention can also simulate pressing in-vehicle switches using an external voice module. For example, when a voice recognition unit is connected, the main control MCU module 10 performs a corresponding operation by having the voice command recognition unit 52 analyze the data from the microphone 50 received by the digital-to-analog conversion unit 51. For example, after recognizing a voice command to turn on the hazard lights, the MCU module 10 performs the hazard light operation. 【0051】 In this embodiment, it is preferable that the main control MCU module 10 includes a gesture recognition command processing unit 62 for converting gesture signals into command signals. 【0052】 In this embodiment, more preferably, the gesture recognition command processing unit 62 includes a gesture sensor 60 and a gesture motion analysis unit 61, and the gesture sensor 60 transmits gesture information to the gesture recognition command processing unit 62 via the gesture motion analysis unit 61. 【0053】 In this embodiment, the gesture recognition command processing unit 62 is preferably a chip with model number GY-PAJ7620U2. 【0054】 In this embodiment, the gesture sensor 60 collects gesture information, transmits the gesture information to the gesture recognition command processing unit 62 via the gesture motion analysis unit 61, and then controls the main control MCU module 10 to transmit a command signal. 【0055】 In addition to in-car switches, the present invention can also simulate pressing in-car switches using an external gesture recognition module. For example, when a gesture recognition command processing unit 62 is connected, the main control MCU module 10 performs a corresponding action by analyzing the data received by the gesture motion analysis unit 61 from the gesture recognition command processing unit 62. For example, it can recognize a motion of swiping the palm from right to left and perform an operation to lower the navigation volume, or recognize a motion of swiping the palm from left to right and perform an operation to increase the navigation volume. 【0056】 In this embodiment, it is preferable that the main control MCU module 10 includes a wireless transmission receiver 102. 【0057】 In this embodiment, the wireless transmission receiver 102 is preferably a chip with model number Ling-R2. 【0058】 In this embodiment, the present invention may include a remote control 70 equipped with a wireless transmission transmitter 71, the remote control 70 transmitting command signals to a wireless transmission receiver 102 via the wireless transmission transmitter 71, and the remote control 70 controlling the main control MCU module 10 via the wireless transmission receiver 102. 【0059】 In addition to the in-vehicle switch, the present invention may also simulate the in-vehicle switch using an external switch. For example, the hazard lights can be operated by controlling the data received by the main control MCU module 10 via the remote control 70. 【0060】 After the switch function of the present invention is expanded, it will not only be possible to control switches inside a car, but also to control devices connected to the host. For example, when the ambient lighting inside the car is connected to the host, the mode of the ambient lighting can be switched using the double-click function. When the host is connected to an external TV function restriction removal system, the TV function can be switched on and off using the double-click function. When the host is connected to an external 360 panoramic camera, the surroundings of the car can be viewed using the double-click function. 【0061】 The foregoing describes only preferred embodiments of the present invention and does not limit the scope of the claims of the present invention. The present invention is subject to various modifications and improvements without departing from the spirit and scope of the invention, and equivalent structural transformations or other direct / indirect applications in the relevant art, utilizing the contents of the specification and drawings of the present invention under the inventive concept of the present invention, are within the scope of protection of the claims of the present invention.

Claims

[Claim 1] An automotive switch multifunction expansion system comprising a main control MCU module, a first signal detection unit connected to a first in-vehicle switch unit and an in-vehicle switch signal unit by a common signal line, a second signal detection unit connected to a second in-vehicle switch unit, a first switch control unit, and a second switch control unit, When the main control MCU module receives a switch command from the first in-vehicle switch unit to simulate the operation of the second in-vehicle switch unit via the first signal detection unit and the first switch control unit, The automotive switch multi-function expansion system is characterized in that the main control MCU module transmits the processed switch commands to the second in-vehicle switch unit via the second switch control unit and the second signal detection unit, and simulates the operation of the second in-vehicle switch unit, thereby causing the in-vehicle switch signal unit to process the signal information of the second in-vehicle switch unit. [Claim 2] An automotive switch multifunction expansion system comprising a main control MCU module, a second signal detection unit connected to a second in-vehicle switch unit, a third signal detection unit connected to each of the switch units of a third in-vehicle switch unit including a plurality of switch units via separate signal lines and connected to an in-vehicle switch signal unit via a single signal line, a second switch control unit, and a third switch control unit, The operation of the third in-vehicle switch unit causes the voltage state of the signal line to switch to 3 or higher. When the main control MCU module receives a switch command from the third in-vehicle switch unit to simulate the operation of the second in-vehicle switch unit via the third signal detection unit and the third switch control unit, The main control MCU module transmits the processed switch command to the second in-vehicle switch unit via the second switch control unit and the second signal detection unit, and simulates the operation of the second in-vehicle switch unit, thereby causing the in-vehicle switch signal unit to process the signal information of the second in-vehicle switch unit. When the main control MCU module receives a switch command for operating the third in-vehicle switch unit from the third in-vehicle switch unit via the third signal detection unit and the third switch control unit, The main control MCU module is characterized by causing the third switch control unit to restore the state of the signal lines between the third in-vehicle switch unit and the third signal detection unit, and the signal lines between the third signal detection unit and the in-vehicle switch signal unit, to an operation corresponding to the third in-vehicle switch unit. [Claim 3] An automotive switch multifunction expansion system comprising a main control MCU module, a second signal detection unit connected to a second in-vehicle switch unit, a fourth signal detection unit connected to a fourth in-vehicle switch unit and an in-vehicle switch signal unit by separate signal lines, a second switch control unit, and a fourth switch control unit, The operation of the fourth in-vehicle switch unit switches between two states. When the main control MCU module receives a switch command from the fourth in-vehicle switch unit to simulate the operation of the second in-vehicle switch unit via the fourth signal detection unit and the fourth switch control unit, The main control MCU module transmits the processed switch command to the second in-vehicle switch unit via the second switch control unit and the second signal detection unit, and simulates the operation of the second in-vehicle switch unit, thereby causing the in-vehicle switch signal unit to process the signal information of the second in-vehicle switch unit. When the main control MCU module receives a switch command for operating the fourth in-vehicle switch unit from the fourth in-vehicle switch unit via the fourth signal detection unit and the fourth switch control unit, The automotive switch multi-function expansion system is characterized in that the main control MCU module simulates the switch command for operating the fourth vehicle switch unit by using the state of the signal line between the fourth signal detection unit and the vehicle switch signal unit via the fourth switch control unit and the fourth signal detection unit. [Claim 4] The automotive switch multifunction expansion system according to claim 3, wherein the switch commands for operating the fourth in-vehicle switch unit are simulated by analog unit control in the fourth switch control unit and the fourth signal detection unit. [Claim 5] When the main control MCU module receives a switch command for operating the first in-vehicle switch unit from the first in-vehicle switch unit via the first signal detection unit and the first switch control unit, The automotive switch multi-function expansion system according to claim 1, characterized in that the main control MCU module does not perform any processing. [Claim 6] The third in-vehicle switch unit, which includes multiple switch units, further includes a third signal detection unit that is connected to each of the switch units by separate signal lines and to the in-vehicle switch signal unit by a single signal line. When the main control MCU module receives a switch command from the third in-vehicle switch unit to simulate the operation of the second in-vehicle switch unit via the third signal detection unit and the third switch control unit, The main control MCU module transmits the processed switch command to the second in-vehicle switch unit via the second switch control unit and the second signal detection unit, and simulates the operation of the second in-vehicle switch unit, thereby causing the in-vehicle switch signal unit to process the signal information of the second in-vehicle switch unit. When the main control MCU module receives a switch command for operating the third in-vehicle switch unit from the third in-vehicle switch unit via the third signal detection unit and the third switch control unit, The automotive switch multifunction expansion system according to claim 1, characterized in that the main control MCU module causes the third switch control unit to restore the state of the signal lines between the third in-vehicle switch unit and the third signal detection unit and the signal lines between the third signal detection unit and the in-vehicle switch signal unit to an operation corresponding to the third in-vehicle switch unit. [Claim 7] When the main control MCU module receives a switch command for simulating the operation of an external device of a vehicle connected to the automotive switch multifunction expansion system, The automotive switch multi-function expansion system according to any one of claims 1 to 6, characterized in that the main control MCU module controls the operation of the external device. [Claim 8] The aforementioned automotive switch multifunction expansion system further comprises a switch control unit and a signal detection unit for the external device, When the main control MCU module receives a switch command for simulating the operation of the external device, the automotive switch multifunction expansion system... The automotive switch multifunction expansion system according to claim 7, characterized in that the main control MCU module transmits the processed switch commands to the external device via the switch control unit and signal detection unit for the external device.

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