KR20020095279A - Apparatus for a sun-roof for vehicles - Google Patents
Apparatus for a sun-roof for vehicles Download PDFInfo
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- KR20020095279A KR20020095279A KR1020010033374A KR20010033374A KR20020095279A KR 20020095279 A KR20020095279 A KR 20020095279A KR 1020010033374 A KR1020010033374 A KR 1020010033374A KR 20010033374 A KR20010033374 A KR 20010033374A KR 20020095279 A KR20020095279 A KR 20020095279A
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- roof glass
- roof
- glass
- piezoelectric sensor
- control unit
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
- B60J7/02—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes
- B60J7/04—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with rigid plate-like element or elements, e.g. open roofs with harmonica-type folding rigid panels
- B60J7/043—Sunroofs e.g. sliding above the roof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
- B60J7/02—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes
- B60J7/04—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with rigid plate-like element or elements, e.g. open roofs with harmonica-type folding rigid panels
- B60J7/057—Driving or actuating arrangements e.g. manually operated levers or knobs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
Description
본 발명은 차량의 선루프장치에 관한 것으로, 특히 루프글라스의 개폐동작 시에 장애물에 의해 원활한 구동이 이루어지지 않을 경우에는 루프글라스의 작동을 중단 또는 개방하도록 하는 안티핀치(anti-pinch) 기능을 갖는 선루프장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sunroof device of a vehicle. In particular, the present invention provides an anti-pinch function for stopping or opening the roof glass when the roof glass is not smoothly driven by an obstacle. It relates to a sunroof device having.
자동차의 루프패널에는 차량 내 환기 등의 목적으로 선루프를 장착하게 된다. 선루프는 루프패널에 개폐가 가능한 루프글라스를 장착하여 운전자의 편의에 따라 루프글라스를 오픈 또는 폐쇄할 수 있도록 하고 있다.The roof panel of the vehicle is equipped with a sunroof for the purpose of ventilation in the vehicle. The sunroof is equipped with a roof glass that can be opened and closed on the roof panel so that the roof glass can be opened or closed at the convenience of the operator.
이와 같은 선루프는 루프글라스의 일측을 상방향으로 올려 개방하도록 하는 틸트(tilt) 타입과, 루프글라스가 슬라이딩 동작하여 개폐가 되는 슬라이딩(sliding) 타입이 있으며, 이 두 가지 타입 모두를 채용한 형태의 선루프도 제공되고 있다.Such a sunroof has a tilt type for opening one side of the roof glass upward and a sliding type for opening and closing by sliding the roof glass, and adopting both types. Sunroof is also available.
루프글라스의 개폐조작은 운전자에 의해 수동으로 개폐할 수도 있으나, 편의성을 위해 전용의 구동모터를 장착하여 운전자의 스위칭 조작에 의해 개폐가 이루어지도록 하고 있다. 또한, 상기 구동모터를 전자제어부와 연결하여 차량이 정차되어 엔진이 꺼지면 자동으로 루프글라스를 폐쇄하도록 하거나, 습도센서를 구비하여 우천 시에는 자동으로 루프글라스를 폐쇄하도록 하는 선루프 제어방법이 개시되어 있다.The opening and closing operation of the roof glass may be manually opened or closed by the driver, but for convenience, a dedicated driving motor is mounted to be opened and closed by the driver's switching operation. In addition, a sunroof control method is disclosed in which the roof glass is automatically closed when the vehicle is stopped and the engine is turned off by connecting the drive motor to the electronic control unit, or the roof glass is automatically closed in the rain with a humidity sensor. have.
이와 같은 자동제어에 의해 동작하는 선루프는 루프글라스가 폐쇄 시에 신체의 일부나 물체가 삽입되어 루프글라스의 개폐 동작을 방해하는 경우에는 루프글라스의 폐쇄 작동을 중단하거나, 루프글라스를 다시 개방하여 신체의 상해 및 선루프의 파손을 방지하는 안티핀치(anti-pinch) 기능을 채용하고 있다.The sunroof operated by such automatic control stops the closing operation of the roof glass or reopens the roof glass when the part of the body or object is inserted when the roof glass is closed, thereby preventing the opening and closing of the roof glass. It has an anti-pinch function that prevents personal injury and damage to the sunroof.
이하 일반적인 안티핀치 구동 가능한 선루프장치를 도 3을 참고하여 살펴보면 다음과 같다.Hereinafter, a general anti-pinch driving sunroof device will be described with reference to FIG. 3.
도 3에 도시된 바와 같이, 개구부가 형성된 루프패널(1)에는 선루프조립체가 장착된다.As shown in FIG. 3, the sunroof assembly is mounted to the roof panel 1 having the opening.
선루프조립체는 도시되지 않은 프레임과 보강프레임에 의해 지지되어 슬라이딩 동작 가능한 루프글라스(2)으로 이루어진 된다. 이 루프글라스(2)에는 구동케이블(5)이 연결되며, 이 구동케이블(5)은 정,역회전이 가능한 구동모터(3)에 구비된 기어휠(4)에 연결된다.The sunroof assembly is made of a roof glass 2 which is supported by a frame and a reinforcement frame, which is not shown, and which is slidable. A drive cable 5 is connected to the roof glass 2, and the drive cable 5 is connected to a gear wheel 4 provided in the drive motor 3 capable of forward and reverse rotation.
구동모터(3)에는 홀센서(hall sensor)가 구비되어 링자석의 회전을 감지할 수가 있다.The drive motor 3 is provided with a hall sensor to detect the rotation of the ring magnet.
구동모터(3)와, 홀센서(7)는 전자제어유니트(6)에 연결되며, 이 전자제어유니트(6)는 조작부(8)에 연결된다.The drive motor 3 and the hall sensor 7 are connected to the electronic control unit 6, which is connected to the operation unit 8.
이와 같이 구성된 종래의 선루프장치의 작동은 다음과 같다.The operation of the conventional sunroof device configured as described above is as follows.
운전자는 조작부(8)를 조작하여 루프글라스(2)의 개방 또는 폐쇄 동작에 대한 신호를 전자제어유니트(6)로 출력하게 되면, 전자제어유니트(6)는 구동모터(3)를 구동하게 되며, 구동모터(3)의 회전동작에 의해 기어휠(4)이 회동하여 구동케이블(5)에 연결된 루프글라스(2)를 개방 또는 폐쇄하게 된다.When the driver operates the operation unit 8 to output a signal for the opening or closing operation of the roof glass 2 to the electronic control unit 6, the electronic control unit 6 drives the driving motor 3. By rotating the drive motor 3, the gear wheel 4 rotates to open or close the roof glass 2 connected to the drive cable 5.
루프글라스(2)의 개폐 동작과정에서 홀센서(7)는 구동모터(3)의 회전을 감지하여 전자제어유니트(6)로 신호를 출력하게 되며, 전자제어유니트(6)에서는 이 신호를 입력받아 계수하게 된다. 루프글라스(2)가 완전 폐쇄되거나, 완전 개방된 상태에는 이에 해당하는 신호계수값이 저장된 전자제어유니트(6)의 판단에 의해 루프글라스(2)가 완전 개방 또는 완전 폐쇄 상태로 인식하여 루프글라스(2)의 개폐동작을 중단하게 된다.In the opening / closing operation process of the roof glass 2, the hall sensor 7 detects the rotation of the driving motor 3 and outputs a signal to the electronic control unit 6. The electronic control unit 6 inputs the signal. Will be counted. When the roof glass 2 is completely closed or fully open, the roof glass 2 recognizes the roof glass 2 as fully open or completely closed by the judgment of the electronic control unit 6 in which the corresponding signal coefficient value is stored. The opening and closing operation of (2) is stopped.
전자제어유니트(6)는 홀센서(7)의 신호를 계수함에 따라 구동모터(3)의 회전속도를 결정할 수가 있으며, 루프글라스(2)의 폐쇄 동작 위치에 장애물이 있는 경우에는 구동모터(3)의 회전속도가 달리지게 되며, 이러한 신호의 변화는 전자제어유니트(6)에 부하의 변화가 발생한 것으로 인식되어 루프글라스(2)의 폐쇄동작을 중단하거나, 루프글라스(2)를 완전 개방하도록 구동모터(3)를 제어하게 된다.The electronic control unit 6 can determine the rotational speed of the drive motor 3 by counting the signal of the hall sensor 7. In the case where there is an obstacle in the closed operation position of the roof glass 2, the drive motor 3 ), The rotation speed is different, and the change of the signal is recognized as a change of load in the electronic control unit 6 so as to stop the closing operation of the roof glass 2 or to open the roof glass 2 completely. The driving motor 3 is controlled.
즉, 종래의 선루프에서는 구동모터에 홀센서를 구비하여 구동모터의 회전동작을 감지함으로써 루프글라스에 부하가 발생할 경우에는 루프글라스의 폐쇄동작을 중단하거나 완전개방하여 안티핀치 기능을 수행하게 된다.That is, in the conventional sunroof, the hall motor is provided in the driving motor to detect the rotational motion of the driving motor, so that when the load is generated in the roof glass, the closing operation of the roof glass is stopped or completely opened to perform the anti-pinch function.
그러나, 이와 같이 홀센서가 구비된 선루프장치는 루프글라스의 구동 시에 발생할 수 있는 습동저항에 의해 오동작이 발생할 수가 있으며, 전자제어유니트의 제어방법이 복잡하여 적용에 어려움이 발생하게 된다.However, the sunroof device provided with the Hall sensor may malfunction due to sliding resistance that may occur when the roof glass is driven, and the control method of the electronic control unit is complicated, which makes it difficult to apply.
본 발명은 상기의 결점을 해소하기 위한 것으로, 루프글라스의 동작 신뢰성을 향상시킬 수가 있으며, 그 제어방법을 용이하게 할 수 있는 안티핀치 기능을 갖는 선루프장치를 제공하고자 한다.The present invention is to solve the above drawbacks, to provide a sunroof device having an anti-pinch function that can improve the operation reliability of the roof glass, and can facilitate the control method.
이러한 본 발명은 차량의 루프패널 개구부에 개폐가 가능하도록 장착된 루프글라스로 이루어진 선루프장치에 있어서, 웨더스트립이 구비된 상기 루프글라스의 일측 단부에 구비되는 압전센서와; 상기 루프글라스를 구동하기 위한 구동모터와; 상기 루프글라스를 개폐하기 위한 스위치 및 상기 압전센서와 연결되어 입력신호에 따라 상기 구동모터를 제어하는 전자제어유니트로써 달성된다.The present invention relates to a sunroof device made of a roof glass mounted to be opened and closed at a roof panel opening of a vehicle, comprising: a piezoelectric sensor provided at one end of the roof glass having a weather strip; A driving motor for driving the loop glass; It is achieved as an electronic control unit connected to the switch for opening and closing the loop glass and the piezoelectric sensor to control the drive motor in accordance with an input signal.
도 1은 본 발명의 선루프장치의 구성을 보여주는 구성도,1 is a block diagram showing the configuration of the sunroof device of the present invention,
도 2는 본 발명에 따른 루프글라스의 단면을 보여주는 단면도,2 is a cross-sectional view showing a cross section of the roof glass according to the present invention;
도 3은 종래의 선루프장치의 구성을 보여주는 구성도.Figure 3 is a block diagram showing the configuration of a conventional sunroof device.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
10 : 루프패널20 : 루프글라스10: roof panel 20: roof glass
21 : 웨더스트립22 : 압전센서21: Weather strip 22: Piezoelectric sensor
30 : 구동모터31 : 기어휠30: drive motor 31: gear wheel
40 : 전자제어유니트50 : 조작부40: electronic control unit 50: control panel
도 1 및 도 2는 본 발명에 관한 것으로, 도 1은 본 발명의 선루프장치의 구성을 보여주는 구성도이며, 도 2는 본 발명에 따른 루프글라스의 단면을 보여주는 단면도이다.1 and 2 relates to the present invention, Figure 1 is a block diagram showing the configuration of the sunroof device of the present invention, Figure 2 is a cross-sectional view showing a cross section of the roof glass according to the present invention.
본 발명의 실시 예를 첨부 도면을 참고하여 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1에 도시된 바와 같이 본 발명의 선루프장치는 차량의 루프패널(10) 개구부에 개폐가 가능하도록 루프글라스(20)가 장착되며, 루프글라스(20)는 도시되지 않은 선루프조립체에 지지되어 장착된다.As shown in FIG. 1, the sunroof device of the present invention is equipped with a roof glass 20 so as to be opened and closed at an opening of a roof panel 10 of a vehicle, and the roof glass 20 is supported by a sunroof assembly not shown. Is fitted.
루프글라스(20)는 구동케이블(32)과 연결되며, 이 구동케이블(32)은 구동모터(30)의 기어휠(31)과 연결됨에 따라 구동모터(30)의 정,역회전에 따라 루프글라스(20)는 개방 또는 폐쇄되게 된다.Loop glass 20 is connected to the drive cable 32, the drive cable 32 is connected to the gear wheel 31 of the drive motor 30, according to the forward and reverse rotation of the drive motor 30 loop The glass 20 is to be opened or closed.
도 2를 참고하면 상기 루프글라스(20)의 단부에는 기밀을 유지하여 외기 또는 물이 침입하는 것을 방지하기 위한 기밀수단인 공지의 웨더스트립(21)이 구비되며, 이 웨더스트립(21)에는 압력을 전기적인 신호를 출력하게 되는 압전센서(22)가 구비된다.Referring to FIG. 2, the end of the roof glass 20 is provided with a known weather strip 21 which is a gastight means for maintaining airtightness to prevent intrusion of outside air or water, and the weather strip 21 has a pressure. It is provided with a piezoelectric sensor 22 that outputs an electrical signal.
상기 압전센서(22)는 얇은 필름 사이에 압전효과를 지닌 폴리머가 삽입된 얇은 필름으로 구성되며, 이 폴리머는 인가된 압력에 따라 전기 전도성이 달리지게 되므로 전기저항의 변화를 측정하여 압력변화를 감지할 수가 있게 된다.The piezoelectric sensor 22 is composed of a thin film in which a polymer having a piezoelectric effect is inserted between thin films. Since the electrical conductivity varies depending on the applied pressure, the piezoelectric sensor 22 detects a change in electrical resistance by measuring a change in electrical resistance. I can do it.
상기 압전센서(22)와 구동모터(30)는 전자제어유니트(40)와 연결됨과 동시에 운전자가 루프글라스(20)의 개폐를 조작할 수 있도록 하는 조작부(50)와 연결된다.The piezoelectric sensor 22 and the driving motor 30 are connected to the electronic control unit 40 and to the operation unit 50 for allowing a driver to operate the opening and closing of the roof glass 20.
조작부(50)는 개방 또는 폐쇄를 선택할 수 있는 스위치로 구성된다.The operation unit 50 is composed of a switch that can be selected to open or closed.
이와 같이 구성된 본 발명에 따른 선루프장치의 작동은 다음과 같다.The operation of the sunroof device according to the present invention configured as described above is as follows.
운전자는 루프글라스(20)를 개방 또는 폐쇄하고자 하는 경우에는 조작부(50)의 개방 또는 폐쇄 스위치를 조작하게 되며, 조작부(50)의 개폐신호는 전자제어유니트(40)에 전달되며, 이러한 신호를 전달받은 전자제어유니트(40)는 구동모터(30)를 구동하게 된다. 구동모터(30)의 구동에 의해 기어휠(31)은 역회전 또는 정회전하게 되며, 구동케이블(32)을 통해 전달된 기어휠(31)의 회동 작용은 루프글라스(20)를 개방 또는 폐쇄 작동하게 된다.When the driver wants to open or close the roof glass 20, the driver operates the opening or closing switch of the operation unit 50, and the opening / closing signal of the operation unit 50 is transmitted to the electronic control unit 40. The received electronic control unit 40 drives the drive motor 30. The driving of the drive motor 30 causes the gear wheel 31 to rotate in reverse or forward direction. The rotation of the gear wheel 31 transmitted through the drive cable 32 opens or closes the roof glass 20. Done.
루프글라스(20)가 완전 폐쇄된 상태에서 압전센서(22)에서 발생하는 전기적인 신호값은 전자제어유니트(40)에 폐쇄 상태의 신호값으로 저장된 상태이며, 개폐 동작과정에서 압전센서(22)는 감지된 신호를 전자제어유니트(40)로 출력하게 된다.The electrical signal value generated from the piezoelectric sensor 22 in the state in which the roof glass 20 is completely closed is stored as the signal value of the closed state in the electronic control unit 40, and the piezoelectric sensor 22 in the opening and closing operation process. Outputs the detected signal to the electronic control unit 40.
따라서, 루프글라스(20)가 완전 폐쇄된 경우에는 루프패널(10)과 웨더스트립(21)이 밀착되어 기밀을 유지하게 되며, 이때의 압전센서(22)에서 발생하는 전기적인 신호값은 완전 폐쇄된 상태로 전자제어유니트(40)에서 인식하여 구동모터(30)의 구동을 정지하게 된다.Therefore, when the roof glass 20 is completely closed, the roof panel 10 and the weather strip 21 are in close contact with each other to maintain airtightness, and the electrical signal value generated by the piezoelectric sensor 22 at this time is completely closed. In this state, the electronic control unit 40 recognizes and stops the driving of the driving motor 30.
루프글라스(20)의 폐쇄 동작 위치에 장애물이 있는 경우에는 압전센서(22)에 의해 감지되며, 이 신호를 입력받은 전자제어유니트(40)는 구동모터(30)의 구동을 정지하거나 역구동하여 루프글라스(20)를 개방하여 안티핀치 기능을 수행하게 된다.When there is an obstacle in the closed operation position of the roof glass 20, it is detected by the piezoelectric sensor 22, and the electronic control unit 40 which receives this signal stops or reversely drives the driving motor 30. The roof glass 20 is opened to perform an anti-pinch function.
이와 같이 본 발명은 폐쇄작동 시에 작동 위치와 장애물과의 직접적인 접촉에 의해 발생하는 압전센서의 전기적인 신호를 이용하여 안티핀치 기능을 수행하게 되므로 선루프장치의 구성을 간단히 할 수가 있으며, 제어방법을 단순화할 수가 있게 된다.As described above, the present invention can simplify the configuration of the sunroof device since the anti-pinch function is performed by using the electrical signal of the piezoelectric sensor generated by the direct contact between the operating position and the obstacle during the closing operation. Can be simplified.
이상과 같은 본 발명은 루프글라스에 구비되는 웨더스트립 내에 압전센서를 장착함으로써 구동모터에 별도의 센서를 장착할 필요가 없으므로 모터의 크기를 줄일 수가 있다. 또한 종래의 선루프장치는 홀센서에서 감지된 신호를 전자제어유니트에서 계수하여 루프글라스의 개폐를 제어하게 되는 간접적인 방법에 의해 안티핀치 기능을 수행하게 되나, 본 발명은 장애물과 압전센서와의 직접적인 작용에 의해 루프글라스를 제어함으로써 동작의 신뢰성을 향상시킬 수가 있으며, 제어로직을 단순화할 수가 있는 효과가 있는 발명인 것이다.As described above, the piezoelectric sensor may be mounted in the weather strip provided in the roof glass, thereby eliminating the need to install a separate sensor in the driving motor, thereby reducing the size of the motor. In addition, the conventional sunroof device performs the anti-pinch function by an indirect method of controlling the opening and closing of the roof glass by counting the signal detected by the hall sensor in the electronic control unit, but the present invention provides an obstacle between the obstacle and the piezoelectric sensor. By controlling the loop glass by direct action, the reliability of the operation can be improved, and the invention has the effect of simplifying the control logic.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010033374A KR20020095279A (en) | 2001-06-14 | 2001-06-14 | Apparatus for a sun-roof for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010033374A KR20020095279A (en) | 2001-06-14 | 2001-06-14 | Apparatus for a sun-roof for vehicles |
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| Publication Number | Publication Date |
|---|---|
| KR20020095279A true KR20020095279A (en) | 2002-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020010033374A KR20020095279A (en) | 2001-06-14 | 2001-06-14 | Apparatus for a sun-roof for vehicles |
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| Country | Link |
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| KR (1) | KR20020095279A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100795698B1 (en) * | 2006-05-15 | 2008-01-21 | 현대자동차주식회사 | Sun roof of vehicle |
| WO2016059448A1 (en) * | 2014-10-13 | 2016-04-21 | Continental Automotive Gmbh | Capacitive sensor arrangement for distinction of large object from finger |
| CN113352856A (en) * | 2021-06-28 | 2021-09-07 | 河北科技大学 | Automobile skylight anti-pinch mechanical device adopting double S-shaped friction surfaces |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6322727A (en) * | 1986-07-15 | 1988-01-30 | Omron Tateisi Electronics Co | Contact sensing control device |
| JP2000343951A (en) * | 1999-06-01 | 2000-12-12 | Oi Seisakusho Co Ltd | Sun-roof device for automobile |
| JP2001030764A (en) * | 1999-07-26 | 2001-02-06 | Webasto Japan Kk | Sensor-mounting device and pressure-sensitive sensor for detecting caught material |
-
2001
- 2001-06-14 KR KR1020010033374A patent/KR20020095279A/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6322727A (en) * | 1986-07-15 | 1988-01-30 | Omron Tateisi Electronics Co | Contact sensing control device |
| JP2000343951A (en) * | 1999-06-01 | 2000-12-12 | Oi Seisakusho Co Ltd | Sun-roof device for automobile |
| JP2001030764A (en) * | 1999-07-26 | 2001-02-06 | Webasto Japan Kk | Sensor-mounting device and pressure-sensitive sensor for detecting caught material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100795698B1 (en) * | 2006-05-15 | 2008-01-21 | 현대자동차주식회사 | Sun roof of vehicle |
| WO2016059448A1 (en) * | 2014-10-13 | 2016-04-21 | Continental Automotive Gmbh | Capacitive sensor arrangement for distinction of large object from finger |
| CN113352856A (en) * | 2021-06-28 | 2021-09-07 | 河北科技大学 | Automobile skylight anti-pinch mechanical device adopting double S-shaped friction surfaces |
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