KR101664699B1 - Button type electronic shift system - Google Patents

Button type electronic shift system Download PDF

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Publication number
KR101664699B1
KR101664699B1 KR1020150082162A KR20150082162A KR101664699B1 KR 101664699 B1 KR101664699 B1 KR 101664699B1 KR 1020150082162 A KR1020150082162 A KR 1020150082162A KR 20150082162 A KR20150082162 A KR 20150082162A KR 101664699 B1 KR101664699 B1 KR 101664699B1
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KR
South Korea
Prior art keywords
button
console
electronic
guide
shift
Prior art date
Application number
KR1020150082162A
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Korean (ko)
Inventor
김은식
Original Assignee
현대자동차주식회사
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Priority to KR1020150082162A priority Critical patent/KR101664699B1/en
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Publication of KR101664699B1 publication Critical patent/KR101664699B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K20/00—Arrangement or mounting of change-speed gearing control devices in vehicles
    • B60K20/02—Arrangement or mounting of change-speed gearing control devices in vehicles of initiating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/08—Range selector apparatus
    • F16H59/12—Range selector apparatus comprising push button devices
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/015—Arrangements for indicating the position of a controlling member
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/02—Controlling members for hand actuation by linear movement, e.g. push buttons
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/03—Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a button type electronic speed-change system, in which a driver operates a single electronic speed-change button 10 to perform a speed-change operation, thereby minimizing the number of buttons for shifting operation, This makes it possible to use the surrounding console space effectively.

Description

Button type electronic transmission system {BUTTON TYPE ELECTRONIC SHIFT SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a button-type electronic speed-change system, and more particularly to a button-type electronic speed-change system that minimizes the number of buttons for shifting operation, thereby facilitating operation and minimizing layout.

Generally, a vehicle equipped with an automatic transmission controls a hydraulic pressure in a shift range set according to the running speed of the vehicle, so that the transmission of the target shift range is automatically operated.

Automatic transmissions use a hydraulic circuit, planetary gears and friction elements to create gear ratios to perform shifting, and control of these components is handled by a Transmission Control Unit (TCU).

Unlike a conventional mechanical transmission system, the Shift By Wire (SBW) system, which is an electronic transmission system for a vehicle, is an electronic transmission system having no mechanical connection structure such as a cable between a transmission and a shift lever, Or the sensor value generated when the button is operated is transmitted to the shift control unit TCU, the solenoid or the electric motor is operated by the electronic signal commanded by the TCU, and the hydraulic circuit of each shift range is operated by the solenoid or the electric motor, And the electronic control is performed electronically.

Therefore, the automatic transmission based on the SBW can transmit forward (D) and reverse (R), neutral (N), and parking (P) by transmitting the driver's shift intention to the TCU as an electric signal through a simple operation of the electronic shift lever or button. ) Range. Further, the shift lever can be downsized and a large space can be secured between the driver's seat and the passenger's seat.

On the other hand, in a lever type in which a shifting operation is performed by a lever in an electronic transmission system, the operation mode of the shift lever is similar to that of a mechanical type shift lever and there is no great advantage in comparison with a mechanical type. Further, space occupied by the console is still large, There is a disadvantage in that it may be injured by the contact of the passenger's body when an accident occurs due to the protruding lever.

In addition, the button type electronic transmission system that performs the shifting operation with the button is easier to shift than the lever type, and the installation position (centafascia) can be changed to a position other than the console, so that the console space can be utilized effectively (P, R, N, and D stages). However, since the number of buttons is large in each of the speed change stages , The operation is inconvenient, and the layout is disadvantageous in particular due to a large number of buttons.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

Korean Patent Publication No. 10-2010-0123150

An object of the present invention is to provide a button-type electronic transmission system that minimizes the number of buttons for shifting operation, thereby facilitating the operation and minimizing the layout.

In order to accomplish the above object, the present invention provides a button type electronic speed-change system comprising: an electronic speed-change button installed to be movable up and down to a console and operated by a driver; A permanent magnet provided on the electronic transmission button and moving up and down together with the electronic transmission button; A PCB mounted on the console to face the permanent magnet and recognizing the speed change stage in accordance with a change in the position of the permanent magnet and outputting the recognized speed change signal to the shift controller; And a button return device connected to the electronic shift button and operated through control of the PCB to return the electronic shift button in a pressed state to an initial state before being pressed.

And a release switch installed in the console for transmitting a signal to the PCB so that the button return device can operate when the driver operates the device.

And a display disposed at one side of the electronic shift button on the console to display a current gear stage output and a warning signal output from the PCB.

Wherein the button return device is coupled to the electronic transmission button and operates in conjunction with the electronic transmission button, the button guide moving in a direction opposite to the moving direction of the electronic transmission button; And an actuator coupled to the button guide and operated through control of the PCB to generate power to operate the button guide to return the electronic shift button to its initial state before being pressed.

A cylindrical console guide protruding downward from the console; The console guide is formed with a console guide hole extending in a vertical direction; The electronic shift button is provided with a button projection inserted into a console guide hole, and the button projection is moved along the guide hole of the console so that the electronic shift button can be moved up and down while being guided by the console guide.

And the actuator is a stepping motor.

A button guide hole formed to be inclined in a helical shape is formed on the electronic transmission button; A button guide pin inserted into the button guide hole is formed in the button guide so that the button guide pin is moved along the button guide hole so that when the electronic transmission button moves up and down, the button guide moves in a direction opposite to the moving direction of the electronic transmission button .

Wherein the step motor sets a different resistance force for each gear position to give the driver a feeling of operation when changing the gear position; The magnet power of the rotor constituting the step motor is changed differently for each gear stage or the gap between the rotor and the stator is set differently for each gear stage so that the resistance of the step motor is set differently for each gear stage.

The PCB outputs a P-stage signal when the electronic shift button is maximally raised to the upper side of the console, and the button guide pin is located at the lower end of the button guide hole; The PCB outputs a D-stage signal when the electronic shift button is at a maximum lowered position below the console, and the button guide pin is located at the upper end of the button guide hole; The PCB outputs an R-stage or N-stage signal when the electronic shift button is located between a state in which the electronic shift button is maximally raised to the upper side of the console and a state in which the electronic shift button is maximally lowered in the upward direction of the console and the button guide pin outputs a button guide hole in the lower- In the second direction.

Wherein the release switch is a button-type switch provided at one side of the electronic type shift lever and operated by a driver.

And the release switch is a dial type switch which is installed so as to be penetrated by the electronic type shift lever and is operated by the driver turning.

According to the electronic transmission system of the present invention, the number of the buttons for the shift operation can be minimized with the structure in which the driver operates the one electronic shift button to perform the shift operation. Thus, the shift operation is easy and simple, The cost can be reduced, and the layout can be minimized, so that the surrounding console space can be utilized effectively.

Further, since the shifting operation is performed by one electronic transmission button, it is possible to perform a quick shifting operation, thereby significantly reducing the fatigue of the driver due to the shifting operation.

1 is a perspective view of a button type electronic transmission system according to the present invention,
Figs. 2 to 4 are a bottom perspective view, a front view and an exploded perspective view of Fig. 1,
5 to 6 are views for explaining the operation of the button type electronic transmission system according to the present invention,
7 to 8 are graphs for explaining the resistance relationship between the electronic transmission button and the step motor according to the present invention,
9 is a perspective view of a button type electronic transmission system having a dial type release switch according to the present invention.

Hereinafter, a button type electronic transmission system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

A button-type electronic transmission system according to the present invention is installed in a console located at a side of a driver and includes one electronic transmission button operated by a driver for a shift operation and a release switch.

That is, the embodiment according to the present invention is an electronic type shift button 10 which is installed to be movable up and down with respect to the console 1 as shown in Figs. A permanent magnet 20 provided on the electronic transmission button 10 and moving up and down together with the electronic transmission button 10; (P, R, N, D) in accordance with a change in the position of the permanent magnet 20 installed in the console 1 facing the permanent magnet 20 and outputs the recognized speed change signal to the speed change controller A PCB 30 (Printed Circuit Board) for outputting to a TCU; And a button return device (40) connected to the electronic transmission button (10) and operated through the control of the PCB (30) to return the electronic transmission button (10) in a pressed state to an initial state before being pressed .

When a signal of the changed speed change stage is outputted from the PCB 30, the output signal at this time is transmitted to the shift control unit (TCU), and the solenoid or the electric motor is operated by the electronic signal commanded by the TCU, The hydraulic pressure is applied to or blocked from the hydraulic circuit for each shift stage by the operation, whereby the shift control is performed electronically.

Therefore, the present invention is configured such that the driver operates the speed change stage by using one electronic transmission button 10, so that the number of the buttons for the shift operation can be minimized, which makes the operation easy and simple, So that the console space can be utilized advantageously.

In addition, the present invention is provided with a release switch 50 installed in the console 1 for transmitting a signal to the PCB 30 so that the button return device 40 can operate when the driver operates the device; And a display 60 mounted on one side of the electronic transmission button 10 on the console 1 to display a current gear stage and warning signal output from the PCB 30. [

The release switch 50 is connected to the PCB 30 through a wire and the PCB 30 is connected to an actuator to be described later through a wire so that when the release switch 50 is operated, The actuator is configured to operate.

The button return device 40 is coupled to the electronic transmission button 10 and operates in conjunction with the electronic transmission button 10 and includes a button guide 41 that moves in a direction opposite to the moving direction of the electronic transmission button 10, And the button guide 41 is operated by controlling the PCB 30 so as to generate power to return the electronic transmission button 10 to the initial state before being pressed And an actuator (42).

The button guide 41 is formed in a cylindrical shape so that when the button guide 41 is moved downwardly of the console 1 of the electronic shift button 10, the button guide 41 is moved upward toward the console 1. In this case, 10 are inserted into a cylindrical guide member 41 formed in a cylindrical shape.

The actuator 42 is preferably a stepping motor, but is not limited thereto.

The actuator 42 is provided with a rotary shaft 42a and a connecting rod 41a passing through the center of the button guide 41 in a cross shape is integrally provided on the bottom surface of the button guide 41, The rotation shaft 42a is coupled to the center of the connection rod 41a. When the rotation shaft 42a rotates, the button guide 41 is rotated without being eccentric.

A cylindrical console guide 70 is formed to protrude downward from the console 1 and a console guide hole 71 extending vertically is formed in the console guide 70. The electronic gearshift button 10, The button projection 11 inserted into the console guide hole 71 is formed so that the button projection 11 moves along the console guide hole 71 so that the electronic shift button 10 is guided by the console guide 70 It is possible to move up and down.

The console guide holes 71 are formed to be opposed to each other at symmetrical positions along the circumferential direction of the console guide 70. The button projections 11 are also formed of two pieces, The electronic shift button 10 can be stably moved up and down by the two button projections 11 fitted in the console guide hole 71 .

A button guide hole 12 formed in a helical shape is formed on the electronic shift button 10 and a button guide pin 41a inserted into the button guide hole 12 is formed in the button guide 41, When the electronic shift button 10 is moved up and down as the pin 41a moves along the button guide hole 12, the button guide 41 is moved in the opposite direction to the moving direction of the electronic shift button 10 .

The button guide holes 12 are formed in two, symmetrically formed at positions between the button protrusions 11, and the button guide pins 41a are symmetrically positioned. When the electronic transmission button 10 is moved up and down with respect to the console 1, the button guide 41 is stably supported by the two button guide pins 41a fitted in the button guide holes 12, As shown in FIG.

When the actuator 42 is a stepping motor, the stepping motor sets a different resistance force for each gear stage so as to give the driver a sense of operation at the time of changing the speed change stage. The magnet strength of the rotor constituting the stepping motor is varied Or the gap between the rotor and the stator is set differently for each gear stage, the resistance of the step motor can be set differently for each gear stage.

The technique of controlling the resistance of the stepper motor is one of the known technologies in the related art. Specific technical details are described in "Latest automobile engineering series 3 - Advanced automotive electric & electronics (September 5, 2012, published by Golden Bell) A study on the reduction of cogging torque according to the shape of the core (Research papers, Dept. of Electronic and Electrical Engineering, Pusan National University, Apr. 16, 2010) ", and a description thereof will be omitted.

7, when the speed change stage is changed from the P-stage to the R-stage, the resistance is increased and the erroneous operation can be prevented. As a result, the speed change stage from the N-stage to the R- It is possible to prevent the erroneous operation by increasing the resistance.

As shown in Fig. 8, when the speed change stage is changed from the P-stage to the R-stage, the resistance can be increased to prevent erroneous operation. When the speed change stage is changed from the R- When the speed change stage is changed from the N-th stage to the R-stage, the resistance can be increased and the erroneous operation can be prevented.

5, the PCB 30 outputs a P-stage signal when the electronic shift button 10 is maximally raised to the upper side of the console 1, and the button guide pin 41a outputs a P- 6, the PCB 30 outputs a D-stage signal when the electronic shift button 10 is fully lowered to the lower side of the console 1, The pin 41a is located at the upper end of the button guide hole 12. When the electronic shift button 10 is positioned between the maximum upward state and the maximum upward state of the console 1, (30) outputs an R-stage or N-stage signal, and the button guide pin (41a) is positioned between the lower end portion and the upper end portion of the button guide hole (12).

1, the release switch 50 according to an embodiment of the present invention may be a button-type switch installed at one side of the electronic shift lever 10 and operated by a driver, or may be an electronic shift lever 10, which can be a dial type switch that is turned by the driver.

Hereinafter, the operation of the embodiment according to the present invention will be described.

5 is a state before the driver performs the shifting operation. At this time, the electronic transmission button 10 is maximally raised to the upper side of the console 1 and the button guide pin 41a is in a state in which the button guide hole 12 is in the lower And the PCB 30 recognizes the position of the permanent magnet 20 and outputs a P-stage signal corresponding to the current gear position.

When the driver pushes the electronic shift button 10 with the finger in the P-stage state (arrow F1), the button projection 11 moves along the console guide hole 71, and at the same time, The permanent magnet 20 moves downward along the guide 70 linearly and the permanent magnet 20 moves together with the electronic transmission button 10. [

At the same time, the button guide 41 and the actuator 42 are moved upward while rotating in the direction of the arrow R1 in the illustrated state.

When the button guide pin 41 comes to the R-end position when the button guide 41 and the actuator 42 are moved up, the PCB 30 recognizes the position of the permanent magnet 20 and determines R And outputs a short signal.

When the position of the permanent magnet 20 changes, the magnetic flux changes, and the PCB 30 generates a current corresponding to the changed magnetic flux. That is, when the permanent magnet 20 changes its position from the P- The PCB 30 outputs a current corresponding to the changed magnetic flux.

When the driver further presses the electronic shift button 10 in the R-stage state, the electronic transmission button 10 and the permanent magnet 20 are further lowered, and the button guide 41 and the actuator 42 are further raised And the button guide pin 41 moves upward along the button guide hole 12 and comes to the Nth stage. At this time, the PCB 30 recognizes the position of the permanent magnet 20, Stage N-stage signal.

When the driver further presses the electronic shift button 10 in the N-step state, the electronic shift button 10 and the permanent magnet 20 are brought to the maximum down state as shown in Fig. The button guide pin 41 moves to the upper end of the button guide hole 12 and comes to the D-stage position. At this time, the PCB 30 transmits the D-stage signal .

6, when the driver operates the release switch 50, an operation signal is transmitted to the PCB 30 and the actuator 42 is controlled by the control of the PCB 30 Lt; / RTI >

When the actuator 42 is operated, the button guide 41 and the actuator 42 are moved downward while rotating in the direction of arrow R2 in the illustrated state, and the button guide pin 41 is lowered along the button guide hole 12 formed at an inclination The button projection 11 moves upward along the console guide hole 71 and the electronic transmission button 10 and the permanent magnet 20 move up together and finally the electronic transmission button 10 5 < / RTI >

6, when the release switch 50 is released from the proper position by the driver in the process of returning from the state of FIG. 6 to the state of FIG. 5, the position of the permanent magnet 20 Accordingly, the PCB 30 outputs the N-stage or R-stage signal.

As described above, in the electronic transmission system according to the present invention, the number of the buttons for the shift operation can be minimized by a configuration in which the driver operates the single electronic transmission button 10 to perform the shift operation, It is easy and simple to operate, the cost can be reduced, and the layout can be minimized, thereby advantageously utilizing the surrounding console space.

In addition, since the shifting operation is performed by one electronic transmission button 10, it is possible to carry out a fast shifting operation, thereby significantly reducing the fatigue of the driver due to the shifting operation.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10 - Electronic shift button 20 - PCB
30 - Switch mechanism 31 - Switch case
32 - Switch block 33 - Switch spring
34 - fixed terminal 35 - movable terminal
50 - Button load 60 - Button spring
70 - Button projection

Claims (11)

An electronic shift button installed so as to be movable up and down with respect to the console and operated by a driver;
A permanent magnet provided on the electronic transmission button and moving up and down together with the electronic transmission button;
A PCB mounted on the console to face the permanent magnet and recognizing the speed change stage in accordance with a change in the position of the permanent magnet and outputting the recognized speed change signal to the shift controller; And
And a button return device connected to the electronic shift button and operated through control of the PCB to return the electronic shift button in a pressed state to an initial state before being pressed;
Wherein the button return device is coupled to the electronic transmission button and operates in conjunction with the electronic transmission button, the button guide moving in a direction opposite to the moving direction of the electronic transmission button; And
An actuator coupled to the button guide and operated through control of the PCB to generate power to operate the button guide to return the electronic shift button to its initial state before being pressed;
A button guide hole formed to be inclined in a helical shape is formed on the electronic transmission button;
A button guide pin inserted into the button guide hole is formed in the button guide so that the button guide pin is moved along the button guide hole so that when the electronic transmission button moves up and down, the button guide moves in a direction opposite to the moving direction of the electronic transmission button and;
The PCB outputs a P-stage signal when the electronic shift button is maximally raised to the upper side of the console, and the button guide pin is located at the lower end of the button guide hole;
The PCB outputs a D-stage signal when the electronic shift button is at a maximum lowered position below the console, and the button guide pin is located at the upper end of the button guide hole;
The PCB outputs an R-stage or N-stage signal when the electronic shift button is located between a state where the electronic shift button is maximally raised to the upper side of the console and a state where it is fully lowered, and the button guide pin outputs a button guide hole between the lower end portion and the upper end portion And wherein the electronic control unit is located in the electronic control unit. The method according to claim 1,
Further comprising a release switch installed on the console for transmitting a signal to the PCB so that the button return device can operate when the driver operates the button. The method according to claim 1,
Further comprising: a display mounted on one side of the electronic shift button on the console for displaying a current shift range and warning signal output from the PCB. delete The method according to claim 1,
A cylindrical console guide protruding downward from the console;
The console guide is formed with a console guide hole extending in a vertical direction;
Wherein the electronic shift button is provided with a button projection inserted into a console guide hole so that the electronic shift button is guided by the console guide when the button projection moves along the guide hole of the console, Transmission system. The method according to claim 1,
Wherein the actuator is a step motor. delete The method of claim 6,
Wherein the step motor sets a different resistance force for each gear position to give the driver a feeling of operation when changing the gear position;
Characterized in that the magnet power of the rotor constituting the step motor is changed differently for each speed change stage or the gap between the rotor and the stator is set differently for each speed change stage to set the resistance force of the step motor differently for each speed change stage system. delete The method of claim 2,
Wherein the release switch is a button-type switch provided on one side of the electronic shift lever and operated by a driver. The method of claim 2,
Wherein the release switch is a dial-type switch that is provided so as to be penetrated by an electronic shift lever and is operated by a driver to turn it.
KR1020150082162A 2015-06-10 2015-06-10 Button type electronic shift system KR101664699B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102190287B1 (en) 2020-01-20 2020-12-11 김태석 Console device of car

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040052440A (en) * 2002-12-17 2004-06-23 현대자동차주식회사 Rear view mirror system which constructed in rear spoiler
KR20100123150A (en) 2009-05-14 2010-11-24 주식회사 케피코 Apparatus and method for detecting fault of automatic transmission based on shift by wire
JP2012076663A (en) * 2010-10-04 2012-04-19 Tokai Rika Co Ltd Shift device
KR101384532B1 (en) * 2013-05-03 2014-04-11 현대자동차주식회사 Electronic shift lever
KR101421957B1 (en) * 2013-08-06 2014-07-22 현대자동차주식회사 Organ-type electronic shift lever

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040052440A (en) * 2002-12-17 2004-06-23 현대자동차주식회사 Rear view mirror system which constructed in rear spoiler
KR20100123150A (en) 2009-05-14 2010-11-24 주식회사 케피코 Apparatus and method for detecting fault of automatic transmission based on shift by wire
JP2012076663A (en) * 2010-10-04 2012-04-19 Tokai Rika Co Ltd Shift device
KR101384532B1 (en) * 2013-05-03 2014-04-11 현대자동차주식회사 Electronic shift lever
KR101421957B1 (en) * 2013-08-06 2014-07-22 현대자동차주식회사 Organ-type electronic shift lever

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102190287B1 (en) 2020-01-20 2020-12-11 김태석 Console device of car

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