KR20040016262A - Apparatus for opening or closing of door in car - Google Patents

Apparatus for opening or closing of door in car Download PDF

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Publication number
KR20040016262A
KR20040016262A KR1020020048532A KR20020048532A KR20040016262A KR 20040016262 A KR20040016262 A KR 20040016262A KR 1020020048532 A KR1020020048532 A KR 1020020048532A KR 20020048532 A KR20020048532 A KR 20020048532A KR 20040016262 A KR20040016262 A KR 20040016262A
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KR
South Korea
Prior art keywords
door
circular slider
arc
guide space
opening
Prior art date
Application number
KR1020020048532A
Other languages
Korean (ko)
Inventor
남신
Original Assignee
현대자동차주식회사
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Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020020048532A priority Critical patent/KR20040016262A/en
Publication of KR20040016262A publication Critical patent/KR20040016262A/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
    • E05F15/53—Power-operated mechanisms for wings using fluid-pressure actuators for swinging wings
    • 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
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/047—Doors arranged at the vehicle sides characterised by the opening or closing movement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/43—Motors
    • E05Y2201/448—Fluid motors; Details thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/708—Sliders

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

PURPOSE: A car door operating device is provided to sense the opening and closing of a door automatically, and to open and close a door simply and easily using hydraulic pressure. CONSTITUTION: The car door operating device comprises the steps of fixing many cylindrical columns(110) on a door mounting area where a door(2) is attached, forming an arched guide space(111) in the cylindrical column(110), filling up the arched guide space(111) with oil, installing a circular slider(120) in the arched guide space(111) to move rightward and leftward along the arched slide space(111), installing a door(2) on the circular slider(120), installing a contact unit(130) elastically to the end of the circular slider(120) to be adhered to an internal wall of the circular column(110), and installing a hydraulic unit to the inside of the circular column(110) to let oil flow in and out.

Description

자동차의 도어 개폐장치{Apparatus for opening or closing of door in car}Apparatus for opening or closing of door in car}

본 발명은 자동차의 도어 개폐장치에 관한 것으로, 더욱 상세하게는 압전센서를 이용하여 도어의 열림과 닫힘을 자동 감지하고, 유압을 이용하여 도어를 전자동으로 개폐시킬 수 있도록 구성된 자동차의 도어 개폐장치에 관한 것이다.The present invention relates to a door opening and closing device of a vehicle, and more particularly to a door opening and closing device of a vehicle configured to automatically detect the opening and closing of the door by using a piezoelectric sensor, and to automatically open and close the door using hydraulic pressure. It is about.

일반적으로 도어는 승객이 출입하기 위한 개폐기능과 승객 및 차 실내를 비, 바람과 사고로부터 보호해주는 역할을 하는 것으로, 열리는 방향에 따라 앞 힌지 후 개폐형과, 슬라이딩 형과, 걸링형 등으로 나뉘어질 수 있다.In general, the door serves to open and close the door for passengers and to protect the passengers and the car from rain, wind and accidents.The door can be divided into an open-close type, a sliding type, and a hanging type after the front hinge according to the opening direction. Can be.

현재 대부분의 자동차는 앞 힌지 후 개폐형을 채택하고 있는 바, 이러한 힌지 타입의 도어는 수동으로 개폐할 수 있도록 구성되어 있다.Currently, most cars adopt an opening type after a front hinge, and the hinge type door is configured to be opened and closed manually.

도 1을 참조하면, 종래 자동차의 힌지형 도어 힌지(10)는 그 일단이 차체(1)에 고정되고 타단이 도어(2)에 고정된다. 따라서 도어(2)는 힌지(10)를 중심으로 회전되면서 열리거나 닫히도록 구성된다.Referring to FIG. 1, a hinged door hinge 10 of a conventional vehicle is fixed at one end thereof to the vehicle body 1 and the other end thereof to the door 2. Thus, the door 2 is configured to open or close while being rotated about the hinge 10.

그러나, 자동차에 적용되는 각 장치들이 전 자동화되는 시점에서 현재의 자동차는 도어를 수동으로만 열고 닫는 구조를 채택하고 있어 소비자의 요구에 부응하지 못하는 한계성을 갖고 있다.However, at the time when each device applied to the car is fully automated, the current car has a structure in which the door is opened and closed only manually, which does not meet the needs of consumers.

본 발명은 상기한 문제점 해결하기 위하여 창안된 것으로서, 그 목적은 압전센서를 이용하여 도어의 열림과 닫힘을 자동 감지하고, 유압을 이용하여 도어를 전자동으로 손쉽고 간편하게 개폐시킬 수 있는 자동차의 도어 개폐장치를 제공함에 있다.The present invention has been made to solve the above problems, the object is to automatically detect the opening and closing of the door using a piezoelectric sensor, the door opening and closing device of the car that can open and close the door automatically and automatically using hydraulic pressure In providing.

도 1은 종래 자동차의 힌지형 도어 힌지를 보인 사시도1 is a perspective view showing a hinged door hinge of a conventional vehicle

도 2는 본 발명에 따른 자동차의 도어 개폐장치를 보인 사시도Figure 2 is a perspective view showing a door opening and closing device of a vehicle according to the present invention

도 3은 본 발명에 따른 자동차의 도어 개폐장치를 보인 종단면도Figure 3 is a longitudinal sectional view showing a door opening and closing device of a vehicle according to the invention

도 4는 본 발명에 따른 자동차의 도어 개폐장치를 보인 평단면도Figure 4 is a plan sectional view showing a door opening and closing device of a vehicle according to the invention

※도면의 주요부분에 대한 부호의 설명※※ Explanation of symbols about main part of drawing ※

2 : 도어110 : 원통기둥2: door 110: cylindrical cylinder

111 : 호형 가이드 공간부120 : 원형 슬라이더111: arc-shaped guide space 120: circular slider

130 : 밀착구140 : 유압수단130: close contact 140: hydraulic means

141 : 튜브142 : 유압모터141: tube 142: hydraulic motor

143 : 오일저장탱크150 : 압전센서143: oil storage tank 150: piezoelectric sensor

160 : 엔진 콘트롤 유니트160: engine control unit

상기 목적을 달성하기 위한 본 발명의 특징적인 구성을 설명하면 다음과 같다.Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

본 발명은 도어가 장착되는 도어 마운팅 부위에 복수개의 원통기둥이 고정되고 그 원통 기둥내부에 호형 가이드 공간부가 형성되며, 그 호형 가이드 공간부에 오일이 충전되며, 상기 호형 가이드 공간부에는 원형 슬라이더가 그 호형 슬라이드 공간부를 따라 좌우로 이동가능 하게 설치되고, 상기 원형 슬라이더에는 상기 도어가 설치되며, 상기 원형 슬라이더의 끝단에는 원통기둥의 내벽과 밀착되는 밀착구가 탄력적으로 설치되고, 상기 원통기둥의 내부에는 유압수단에 의해서 오일이 출입되도록 구성된 특징을 갖는다.According to the present invention, a plurality of cylindrical pillars are fixed to a door mounting portion in which a door is mounted, and an arc-shaped guide space is formed in the cylinder column, oil is filled in the arc-shaped guide space, and a circular slider is provided in the arc-shaped guide space. It is installed to be movable left and right along the arc-shaped slide space, the circular slider is provided with the door, the end of the circular slider is in close contact with the inner wall of the cylindrical pillar elastically installed, the interior of the cylindrical cylinder It has a feature configured to be oil in and out by the hydraulic means.

상기 유압수단은 상기 원통기둥의 양쪽에 튜브가 설치되고, 상기 튜브 중간에는 유압모터와 오일저장탱크가 설치된 특징을 갖는다.The hydraulic means is characterized in that the tube is installed on both sides of the cylindrical cylinder, the middle of the tube is a hydraulic motor and the oil storage tank is installed.

상기 밀착구의 하부에는 압전센서가 설치되며, 그 압전센서는 엔진 콘트롤 유니트와 연결되고 그 엔진 콘트롤 유니트는 상기 유압모터와 연결된 특징을 갖는다.A piezoelectric sensor is installed in the lower portion of the close contact, the piezoelectric sensor is connected to the engine control unit and the engine control unit is connected to the hydraulic motor.

이하, 첨부도면을 참조하여 이와 같이 구성된 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention configured as described above with reference to the accompanying drawings in detail.

도 2는 본 발명에 따른 자동차의 도어 개폐장치를 보인 사시도이고, 도 3은 본 발명에 따른 자동차의 도어 개폐장치를 보인 종단면도이며, 도 4는 본 발명에 따른 자동차의 도어 개폐장치를 보인 평단면도이다.Figure 2 is a perspective view showing a door opening and closing device of a vehicle according to the present invention, Figure 3 is a longitudinal sectional view showing a door opening and closing device of a vehicle according to the present invention, Figure 4 is a flat view showing a door opening and closing device of a vehicle according to the present invention. It is a cross section.

본 발명에서는 도어 마운팅 부위의 상부와 하부가 서로 동일형상으로 대칭을 이루므로 이하에서는 상부 쪽만을 도시하며, 또한 그 상부 쪽을 도시함에 있어서도 원통기둥을 제외한 나머지 구성이 상하 동일형상으로 대칭을 이루므로 그 한쪽에만도면번호를 부여하기로 한다.In the present invention, since the upper and lower parts of the door mounting portion are symmetrical to each other in the same shape, only the upper side is shown below, and also in the upper side, the rest of the configuration except for the cylindrical cylinder is symmetrical in the same shape up and down. The drawing number will be assigned to only one side.

도면에 보인 바와 같이, 본 발명의 도어 개폐장치(100)에서는 도어(2)가 장착되는 도어 마운팅 부위에 원통기둥(110)이 고정된다.As shown in the figure, in the door opening and closing apparatus 100 of the present invention, the cylindrical column 110 is fixed to the door mounting portion on which the door 2 is mounted.

그 원통기둥(110)내부에는 호형 가이드 공간부(111)가 형성되며, 그 호형 가이드 공간부(111)에 오일이 충전된다.An arc-shaped guide space 111 is formed in the cylinder pillar 110, and oil is filled in the arc-shaped guide space 111.

상기 호형 가이드 공간부(111)에는 원형 슬라이더(120)가 그 호형 슬라이드 공간부(111)를 따라 좌우로 이동가능 하게 설치되는 데, 상기 원형 슬라이더(120)에는 상기 도어(2)가 볼트 고정된다.A circular slider 120 is installed in the arc-shaped guide space 111 so as to be movable left and right along the arc-shaped slide space 111, and the door 2 is bolted to the circular slider 120. .

다시 말하면, 원형 슬라이더(120)는 호형 슬라이드 공간부(111)를 따라 좌우로 이동가능 하게 설치되는 데, 상하에 동일한 형상과 위치로 설치된다. 두 개의 원형 슬라이더(120)는 서로 연결 브래킷(C)으로 연결되며, 그 연결 브래킷(C)은 볼트(B)로 도어(2)에 고정되는 것이다.In other words, the circular slider 120 is installed to be movable left and right along the arc-shaped slide space 111, and is installed in the same shape and position above and below. The two circular sliders 120 are connected to each other by a connecting bracket C, and the connecting bracket C is fixed to the door 2 by bolts B.

상기 원형 슬라이더(120)의 끝단에는 원통기둥(110)의 내벽과 밀착되는 밀착구(130)가 탄력적으로 설치되고, 상기 원통기둥(110)의 내부에는 유압수단(140)에 의해서 오일이 출입되도록 구성된다.The end of the circular slider 120 is in close contact with the inner wall of the cylindrical pillar 110 is elastically installed, the oil inside the cylindrical column 110 by the hydraulic means 140 to enter and exit. It is composed.

밀착구(130)는 상기 원형 슬라이더(120)의 내부에 설치되는 데, 밀착구(130)의 끝단부가 일부 돌출되어 원통기둥(110)의 내벽과 밀착된다.The close contact 130 is installed inside the circular slider 120, and the end of the close contact 130 partially protrudes to be in close contact with the inner wall of the cylindrical column 110.

이때, 스프링(131)은 밀착구(130)를 원통기둥(110)의 내벽 쪽으로 탄력 있게 가압하여 원형 슬라이더(120) 및 밀착구(130)를 중심으로 좌우 오일이 이동하지 못하도록 구성된다.In this case, the spring 131 is configured to elastically press the contact hole 130 toward the inner wall of the cylindrical column 110 to prevent the left and right oils from moving around the circular slider 120 and the contact hole 130.

유압을 발생시키는 유압수단(140)의 구성을 살펴보면, 원통기둥(110)의 양쪽에 튜브(141)가 설치되고, 튜브(141) 중간에는 유압모터(142)와 오일저장탱크(143)가 설치된다.Looking at the configuration of the hydraulic means 140 for generating the hydraulic pressure, the tube 141 is installed on both sides of the cylindrical column 110, the hydraulic motor 142 and the oil storage tank 143 is installed in the middle of the tube 141. do.

유압모터(142)와 오일저장탱크(143)는 차 내부에 설치되는 것으로 유압모터(142)가 작동하여 오일저장탱크(143)의 오일을 튜브(141)를 통해 호형 슬라이드 공간부(111) 안으로 유입 또는 유출시키면서 원형 슬라이더(120)를 좌우로 이동시킬 수 있도록 구성된다.The hydraulic motor 142 and the oil storage tank 143 are installed inside the vehicle. The hydraulic motor 142 operates to inject oil from the oil storage tank 143 into the arc-shaped slide space 111 through the tube 141. It is configured to move the circular slider 120 from side to side while flowing in or out.

상기 밀착구(130)의 하부에는 압전센서(150)가 설치되며, 그 압전센서(150)는 엔진 콘트롤 유니트(160)와 연결되고 그 엔진 콘트롤 유니트(160)는 다시 유압모터(143)와 연결된다.A piezoelectric sensor 150 is installed at the lower portion of the contact hole 130, the piezoelectric sensor 150 is connected to the engine control unit 160, and the engine control unit 160 is connected to the hydraulic motor 143 again. do.

따라서, 유압에 의해서 도어(2)를 열고 닫을 때 원형 슬라이더(120)가 호형 슬라이드 공간부(111) 좌우측로 이동하는 데, 이때 밀착구(130)가 원통기둥(110)의 내벽에 선택적으로 가압되며, 이를 압전센서(150)가 감지하며, 이 감지 값은 엔진 콘트롤 유니트(160)에 전달되도록 구성된다.Therefore, when the door 2 is opened and closed by hydraulic pressure, the circular slider 120 moves to the left and right sides of the arc-shaped slide space 111, at which time the contact hole 130 is selectively pressed against the inner wall of the cylindrical column 110. The piezoelectric sensor 150 detects this, and the detected value is configured to be transmitted to the engine control unit 160.

즉, 밀착구(130)가 원통기둥(110)의 내벽에 밀착되지 않을 경우 도어(2)가 닫혀진 것이고, 밀착구(130)가 원통기둥(110)의 내벽에 일정압력으로 밀착될 경우 도어(2)가 열려졌음을 엔진 콘트롤 유니트(160)가 압전센서(150)를 통해서 알 수 있도록 구성된다.That is, when the close contact 130 is not in close contact with the inner wall of the cylinder pillar 110, the door 2 is closed, and if the close contact 130 is in close contact with the inner wall of the cylindrical pillar 110 at a predetermined pressure, the door ( 2) the engine control unit 160 is configured to know through the piezoelectric sensor 150 that the open.

이하, 첨부도면을 참조하여 본 발명의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the present invention with reference to the accompanying drawings.

도 4는 도어가 닫힌 상태를 실선으로 보이고 있는 바, 이 상태에서는밀착구(130)가 원통기둥(110) 내벽에 밀착되지 않고 있으며, 이를 엔진 콘트롤 유니트(160)가 감지한다. 이 상태에서 탑승자가 도어(2)를 열고 싶을 때에는 엔진 콘트롤 유니트(160)를 통해서 유압모터(142)를 구동시키며, 이때 오일저장탱크(143)의 오일이 튜브(141)를 따라 화살표 방향으로 이동하면서 유압을 발생시킨다.4 shows the closed state of the door in a solid line. In this state, the contact hole 130 is not in close contact with the inner wall of the cylindrical column 110, and the engine control unit 160 detects this. In this state, when the occupant wants to open the door 2, the hydraulic motor 142 is driven through the engine control unit 160. At this time, the oil of the oil storage tank 143 moves along the tube 141 in the direction of the arrow. While generating hydraulic pressure.

이때, 발생된 유압으로 원형 슬라이더(120)는 호형 슬라이드 공간부(111)를 따라 이동한다.At this time, the circular slider 120 is moved along the arc-shaped slide space 111 by the generated hydraulic pressure.

원형 슬라이더(120)가 회전하면서 어느 정도 이동하면, 원형 슬라이더(120)에 설치된 도어(2)가 열리게 된다(가상선으로 표시). 이때 밀착구(130)가 스프링(131)에 의해서 원통기둥(110)의 내벽에 밀착되는 데, 엔진 콘트롤 유니트(160)는 압전소자(150)를 통해서 도어(2)의 열림을 감지할 수 있다.When the circular slider 120 is rotated to some extent, the door 2 provided in the circular slider 120 is opened (indicated by a virtual line). At this time, the close contact 130 is in close contact with the inner wall of the cylindrical column 110 by the spring 131, the engine control unit 160 can detect the opening of the door 2 through the piezoelectric element 150. .

이와 같은 방식으로 도어(2)의 개폐를 엔진 콘트롤 유니트(160)가 감지하며, 운전자는 유압수단을 이용하여 도어(2)를 보다 손쉽게 자동 개폐시킬 수 있는 것이다.In this manner, the engine control unit 160 detects the opening and closing of the door 2, and the driver can automatically open and close the door 2 more easily by using hydraulic means.

이와 같이 본 발명에 의하면 압전센서를 이용하여 도어의 열림과 닫힘을 엔진 콘트롤 유니트가 자동 감지하고, 유압을 이용하여 도어를 전자동으로 개폐시킬 수 있는 효과가 있다.As described above, according to the present invention, the engine control unit automatically detects the opening and closing of the door by using a piezoelectric sensor, and has the effect of automatically opening and closing the door using hydraulic pressure.

Claims (3)

도어(2)가 장착되는 도어 마운팅 부위에 복수개의 원통기둥(110)이 고정되고 그 원통기둥(110)내부에 호형 가이드 공간부(111)가 형성되며, 그 호형 가이드 공간부(111)에 오일이 충전되며, 상기 호형 가이드 공간부(111)에는 원형 슬라이더(120)가 그 호형 슬라이드 공간부(111)를 따라 좌우로 이동가능 하게 설치되고, 상기 원형 슬라이더(120)에는 상기 도어(2)가 설치되며, 상기 원형 슬라이더(120)의 끝단에는 원통기둥(110)의 내벽과 밀착되는 밀착구(130)가 탄력적으로 설치되고, 상기 원통기둥(110)의 내부에는 유압수단(140)에 의해서 오일이 출입되도록 구성된 것을 특징으로 하는 자동차의 도어 개폐장치.A plurality of cylinder pillars 110 are fixed to the door mounting portion on which the door 2 is mounted, and an arc-shaped guide space 111 is formed inside the cylinder pillar 110, and oil is formed in the arc-shaped guide space 111. Is filled, and the circular slider 120 is installed in the arc-shaped guide space 111 so as to move left and right along the arc-shaped slide space 111, and the door 2 is provided in the circular slider 120. Is installed, the close end 130 is in close contact with the inner wall of the cylindrical column 110 at the end of the circular slider 120 is elastically installed, the oil inside the cylindrical column 110 by the hydraulic means 140 Door opening and closing device of the vehicle, characterized in that configured to be out. 제1항에 있어서, 상기 유압수단(140)은The method of claim 1, wherein the hydraulic means 140 is 상기 원통기둥(110)의 양쪽에 튜브(141)가 설치되고, 상기 튜브(141) 중간에는 유압모터(142)와 오일저장탱크(143)가 설치된 것을 특징으로 하는 자동차의 도어 개폐장치.Tubes 141 are installed on both sides of the cylindrical pillar 110, and the hydraulic motor 142 and the oil storage tank 143 is installed in the middle of the tube 141, the vehicle door opening and closing device. 제1항에 있어서, 상기 밀착구(130)의 하부에는 압전센서(150)가 설치되며, 그 압전센서(150)는 엔진 콘트롤 유니트(160)와 연결되고 그 엔진 콘트롤 유니트(160)는 상기 유압모터(143)와 연결된 것을 특징으로 하는 자동차의 도어 개폐장치.The method of claim 1, wherein the piezoelectric sensor 150 is installed in the lower portion of the contact hole 130, the piezoelectric sensor 150 is connected to the engine control unit 160 and the engine control unit 160 is the hydraulic pressure Door opening and closing device of the vehicle, characterized in that connected to the motor (143).
KR1020020048532A 2002-08-16 2002-08-16 Apparatus for opening or closing of door in car KR20040016262A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126717A (en) * 1981-01-30 1982-08-06 Mazda Motor Corp Door opening and closing assisting unit
KR930023572A (en) * 1992-05-28 1993-12-21 조래승 Automatic Door Opening and Closing Device
KR970043818A (en) * 1995-12-29 1997-07-26 한승준 Door opener of car
KR19980034909A (en) * 1996-11-09 1998-08-05 박병재 Hydraulic Folding Gate
KR0130282Y1 (en) * 1995-12-21 1998-12-15 김태구 Apparatus for opening and closing door of an automobile
KR19990019968A (en) * 1997-08-30 1999-03-25 양재신 Automatic door opening and closing device of car

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126717A (en) * 1981-01-30 1982-08-06 Mazda Motor Corp Door opening and closing assisting unit
KR930023572A (en) * 1992-05-28 1993-12-21 조래승 Automatic Door Opening and Closing Device
KR0130282Y1 (en) * 1995-12-21 1998-12-15 김태구 Apparatus for opening and closing door of an automobile
KR970043818A (en) * 1995-12-29 1997-07-26 한승준 Door opener of car
KR19980034909A (en) * 1996-11-09 1998-08-05 박병재 Hydraulic Folding Gate
KR19990019968A (en) * 1997-08-30 1999-03-25 양재신 Automatic door opening and closing device of car

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