KR20120134768A - Sliding door interlock opening and shutting equipment - Google Patents

Sliding door interlock opening and shutting equipment Download PDF

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Publication number
KR20120134768A
KR20120134768A KR1020110053912A KR20110053912A KR20120134768A KR 20120134768 A KR20120134768 A KR 20120134768A KR 1020110053912 A KR1020110053912 A KR 1020110053912A KR 20110053912 A KR20110053912 A KR 20110053912A KR 20120134768 A KR20120134768 A KR 20120134768A
Authority
KR
South Korea
Prior art keywords
sliding door
closing device
pulley
pinion gear
central
Prior art date
Application number
KR1020110053912A
Other languages
Korean (ko)
Inventor
김동현
Original Assignee
김동현
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김동현 filed Critical 김동현
Priority to KR1020110053912A priority Critical patent/KR20120134768A/en
Publication of KR20120134768A publication Critical patent/KR20120134768A/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
    • E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
    • 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
    • E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
    • E05F17/002—Special devices for shifting a plurality of wings operated simultaneously for wings which lie one behind the other when closed
    • 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
    • E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
    • E05F17/004—Special devices for shifting a plurality of wings operated simultaneously for wings which abut when closed
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/42—Sliding wings; Details of frames with respect to guiding
    • E06B3/46—Horizontally-sliding wings
    • E06B3/4636—Horizontally-sliding wings for doors
    • 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
    • E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
    • E05F2017/005—Special devices for shifting a plurality of wings operated simultaneously for sliding wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/606—Accessories therefore
    • E05Y2201/62—Synchronisation of transmission members
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/644—Flexible elongated pulling elements; Members cooperating with flexible elongated pulling elements
    • E05Y2201/652—Belts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/644—Flexible elongated pulling elements; Members cooperating with flexible elongated pulling elements
    • E05Y2201/654—Cables
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/71—Toothed gearing
    • E05Y2201/722—Racks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/10—Additional functions
    • E05Y2800/122—Telescopic action

Abstract

PURPOSE: An opening and closing device for a sliding door is provided to prevent external air from flowing into the gap between the top of a doorframe and a sliding door. CONSTITUTION: An opening and closing device for a sliding door comprises pinion gears(110), pulleys(120), a belt(130), and rack gears(210,310). The pinion gears and the pulleys are installed on both sides of the top of a center sliding door(100) and are rotated around shafts(111). The belt is connected to the pulleys. The rack gears are installed on the tops of a inner sliding door(200) and an outer sliding door(300) and are in gear with the pinion gears.

Description

Sliding door interlock opening and shutting equipment}

The present invention relates to a sliding door interlocking opening and closing device, in particular, two pinion gear is installed on the upper part of the center sliding door of the triple sliding door, and the two pinion gears are interlocked with the belt, and the outer sliding door and the inner sliding door pinion gear of the central sliding door. Sliding door interlocking opening and closing device that can be opened and closed by interlocking the sliding door by mounting the rack gear meshing with.

Generally, sliding doors are sliding doors that are pushed to the side. Two or more such sliding doors may be used depending on the size of the entrance.

If more than three sliding doors are used, the remaining sliding doors may be out of position when the user opens and closes the sliding door.

In order to solve this inconvenience, a sliding door interlocking opening and closing device is proposed, in which only one sliding door is opened and closed, the other sliding door is interlocked.

1A and 1B are a plan view and a side view, respectively, of a conventional sliding door interlocking opening and closing device having three sliding doors.

1A and 1B, according to the conventional sliding door interlocking opening and closing device, the poly 12 is installed on both sides of the upper part of the central sliding door 10, and the belt 14 is connected to both poly 12.

The central sliding door 10 and the inner sliding door 20, and the central sliding door 10 and the outer sliding door 30 are connected by the respective connecting bodies 16. The connecting member 16 has a first connecting member 17 connected to the belt 14 formed on the upper part of the central sliding door 20, and a second connecting member connected to the upper part of the inner sliding door 20 or the outer sliding door 30. The connecting member 18 is provided.

In this way, according to the conventional sliding door interlocking opening and closing device connected by the connecting body 16, the outer sliding door 30 is usually used while being fixed to the door frame, when the inner sliding door 20 closed in this state is opened The central sliding door 10 moves together in the direction of the outer sliding door 30 by moving the belt 14 formed on the upper part of the central sliding door 10 by the connecting member 16 connected to the upper part.

However, according to the conventional sliding door interlocking opening and closing device, as shown in Figure 1b is configured to interlock the central sliding door 10, the inner sliding door 20 and the outer sliding door 30 is installed on the upper of each sliding door (A) between the upper side of the door frame and the sliding door is open, there is a problem that can be introduced various dust or insects as well as the outside air.

In addition, the conventional sliding door interlocking opening and closing device has a problem that the durability of the interlocking opening and closing device is deteriorated by connecting the inner sliding door and the outer sliding door to the belt using a connecting body.

The present invention has been made to solve the above problems, the two pinion gear is installed on the top of the center sliding door and the two gears are interlocked with the belt, the outer sliding door and the inner sliding door and the rack engaged with the pinion gear of the center sliding door. By forming a gear and opening and closing the triple sliding doors, the door can be opened and closed so that it does not open between the upper side of the door frame and the sliding doors, thereby preventing external air from flowing in between them. It is an object of the present invention to provide a sliding door interlocking opening and closing device that increases the durability of the device by interlocking the sliding door through the gears instead of the belt.

Sliding door interlocking opening and closing device of the present invention for achieving the above object is installed on both sides of the upper center sliding door pinion gear and pulley to rotate about the axis; Belts connected to both sides of the pulley; And rack gears respectively installed on the upper side of the inner sliding door and the outer sliding door, and engaged with each pinion gear of the central sliding door.

The central sliding door may include a gear installation groove in which a portion of the upper portion is bent so as to install the pinion gear and the pulley on both upper sides thereof; And a belt receiving recess having both side walls in the longitudinal direction between the pulleys and the pulleys so as to accommodate the belts connecting the respective pulleys installed on both sides of the upper part of the central sliding door.

In addition, the sliding door interlocking opening and closing device according to another embodiment of the present invention is a support body mounted on the upper upper sliding door; Pinion gears and pulleys installed on both sides of the support and rotating about an axis; Belts connected to both sides of the pulley; And rack gears respectively installed on the upper side of the inner sliding door and the outer sliding door, and engaged with each pinion gear of the central sliding door.

According to the sliding door interlocking opening and closing device of the present invention, two pinion gears are installed on the upper part of the center sliding door, and the two gears are interlocked with the belt, and the rack gear meshing with the pinion gear of the center sliding door is formed on the outer sliding door and the inner sliding door. This prevents the gap between the upper side of the door frame and the sliding door, thereby preventing external air from flowing in between, and interlocking the central sliding door, the inner sliding door and the outer sliding door through the engagement of gears, not the belt. There is an effect of increasing the durability of the device.

Figure 1a is a plan view showing a conventional sliding door interlocking opening and closing device,
Figure 1b is a side view showing a conventional sliding door interlock opening and closing device,
Figure 2 is a perspective view of a sliding door interlocking opening and closing device according to the present invention,
3 is a plan view showing a sliding door interlocking opening and closing device according to FIG.
Figure 4 is a side view showing the pinion gear and the pulley in the sliding door interlocking opening and closing device according to Figure 2,
5 is a perspective view showing a sliding door interlocking opening and closing device according to another embodiment of the present invention.

Hereinafter, a sliding door interlocking opening and closing device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to the description, a sliding door which is the basis of the present invention will be described.

First, the sliding door is opened and closed while sliding between the upper door frame and the lower door frame, respectively. In general, the upper door frame and the lower door frame (not shown) is formed with a guide portion for guiding the sliding door, respectively. A sliding door is formed in the lower part of the sliding door to move along the guide part so that the sliding door can be opened and closed smoothly, and a guide groove formed in the upper part of the sliding door is guided along the guide part of the upper door frame.

Figure 2 is a perspective view showing a sliding door interlocking switch according to the present invention, Figure 3 is a plan view showing a sliding door interlocking switch according to Figure 2, Figure 4 is a pinion gear in the sliding door interlocking switch according to Figure 2 A side view showing the structure of a pulley (hereinafter referred to as 'pulley').

2 and 3, the sliding door interlocking opening and closing device is installed on both sides of the central sliding door 100, the pinion gear 110 and the pulley 120 and the pulley (120) rotating around the axis 111 And a rack gear 210 and 310 installed on the belt 130 and the inner sliding door 200 and the outer sliding door 300 which are connected to the 120, respectively, and engaged with the pinion gear 110. At this time, the size of the pinion gear 100 formed on the upper center sliding door 100 is preferably larger than the thickness of the center sliding door 100.

On the other hand, the central sliding door 100 is formed with a gear installation groove 141 in which a portion of the upper portion is cut so that the pinion gear 110 and the pulley 120 can be installed on both upper sides. The central sliding door 100 is further provided with a belt receiving recess 143 in the longitudinal direction in which the belt 130 connecting the pulleys 120 provided on both sides of the upper part is received.

At this time, the belt receiving groove 143 is preferably deeply formed to accommodate the belt 130 while being guided along the guide of the upper door frame.

The shaft 111 is fixed to the gear installation groove 141 of the central sliding door 100 as shown in FIG. The pinion gear 110 and the pulley 120 formed integrally with the shaft 110 is rotatably installed.

The inner sliding door 200 and the outer sliding door 300 are provided with rack gears 210 and 310 at the upper side of the side facing the central sliding door 100, and some body is formed in the sliding door in the longitudinal direction ( It may be installed buried in (not shown).

According to the conventional sliding door interlocking opening and closing device connected by the connecting body 16 in this way, the outer sliding door 30 is usually used fixed to the door frame, when the closed inner sliding door 20 is opened is connected to the upper The belt 14 formed on the upper part of the central sliding door 10 is moved together by the connecting body 16 so that the central sliding door 10 moves together in the direction of the outer sliding door 30.

The outer sliding door 300 of the three sliding doors installed sliding door interlocking switch device configured as described above is typically used while being fixed to the door frame, when the inner sliding door 200 is opened, the inner sliding door 200 is opened. While moving, the rack gear 210 formed on the upper surface is moved together.

Then, one side pinion gear 110 of the center sliding door 100 meshed with the rack gear 210 of the inner sliding door 200 is rotated, and both the pulley 120 according to the rotation of the pinion gear 110. The connected belt 130 also rotates.

The other pinion gear 110 of the central sliding door 100 connected to the belt 130 also rotates in the same direction.

At this time, the rack gear 310 formed on the outer sliding door 300 is formed on the center sliding door 100 side like the inner sliding door 200 and is engaged with the pinion gear 110 installed on the central sliding door 100. . As a result, as the other pinion gear 110 of the center sliding door 100 rotates, the rack gear 310 of the outer sliding door 300 meshes with the other pinion gear 110 to move. Therefore, the central sliding door 100 is moved in the direction of the outer sliding door 300 so that the triple sliding door is opened while interlocking.

Outside sliding door 300 of the three sliding doors installed sliding door interlock opening and closing device configured as described above is typically used while being fixed to the door frame, the inner sliding door 200 when the open inner sliding door 200 is closed While moving, the rack gear 210 formed on the upper surface moves together.

Then, one side pinion gear 110 of the center sliding door 100 engaged with the rack gear 210 of the inner sliding door 200 is rotated as opposed to when opening the door, according to the rotation of the pinion gear 110 The belt 130 connected to both pulleys 120 also rotates as opposed to when the door is opened.

The other pinion gear 110 of the central sliding door 100 connected to the belt 130 also rotates in the opposite direction as when the door is opened.

At this time, the rack gear 310 formed on the outer sliding door 300 is formed on the center sliding door 100 side like the inner sliding door 200 and is engaged with the pinion gear 110 installed on the central sliding door 100. . As a result, the rack gear 310 of the outer sliding door 300 is engaged with the other pinion gear 110 to open the door as the other pinion gear 110 of the central sliding door 100 rotates as opposed to when the door is opened. You move in reverse. Therefore, the central sliding door 100 is moved in the direction of the inner sliding door 200 so that the three sliding doors are closed while interlocking.

5 is a perspective view showing a sliding door interlocking opening and closing device according to another embodiment of the present invention. As illustrated in FIG. 5, the sliding door interlocking opening and closing device includes a support 150 mounted on an upper portion of the central sliding door 100; Pinion gear 110 and pulley 120 that are installed on both sides of the support 150 and rotate about the shaft 111, the belt 130 and the inner sliding door 200 and the outer sliding door connected to the pulley 120 Each of the doors 300 includes rack gears 210 and 310 installed at upper portions of the door 300 and engaged with the pinion gear 110. At this time, the size of the pinion gear 100 formed on the support 150 is preferably larger than the thickness of the support 150 and the center sliding door 100.

Therefore, the sliding door interlocking opening and closing device may be used by mounting the gear 110 and the pulley 120 on the support 150 to produce a modularized and then mounted on the central sliding door 100. In this case, the rack gears 210 and 310 may also be integrally manufactured by being installed on the support 150.

The sliding door interlocking opening and closing device of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range permitted by the technical idea of the present invention. If the number of sliding doors is 4 or more, the even sliding door should be equipped with pinion gears, pulleys and belts, the odd sliding doors with rack gears, and the odd sliding doors between even sliding doors with rack gears on both sides. desirable.

100: center sliding door 111: shaft
110: pinion gear 120: pulley
130: belt 150: support
200: inner sliding door 210: rack gear
300: outer sliding door 310: rack gear

Claims (4)

In the sliding door interlocking switchgear,
Pinion gears and pulleys installed on both sides of the upper center sliding door and rotating about an axis;
Belts connected to both sides of the pulley; And
Sliding door interlocking opening and closing device which is installed on the upper side of the inner sliding door and the outer sliding door, respectively, and a rack gear engaged with each pinion gear of the central sliding door.
The method of claim 1,
The pinion gear and the pulley,
A part of both sides of the central sliding door is installed in the gear installation groove formed by cutting,
Sliding door interlocking opening and closing device characterized in that the belt is accommodated in a belt receiving groove formed in the longitudinal direction between the pulley and the pulley.
In the sliding door interlocking switchgear,
A support mounted on the upper part of the central sliding door;
Pinion gears and pulleys installed on both sides of the support and rotating about an axis;
Belts connected to both sides of the pulley; And
Sliding door interlocking opening and closing device which is installed on the upper side of the inner sliding door and the outer sliding door, respectively, and a rack gear engaged with each pinion gear of the central sliding door.
An interlocking triple sliding door equipped with a sliding door interlocking switch according to any one of claims 1 to 3.



KR1020110053912A 2011-06-03 2011-06-03 Sliding door interlock opening and shutting equipment KR20120134768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110053912A KR20120134768A (en) 2011-06-03 2011-06-03 Sliding door interlock opening and shutting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110053912A KR20120134768A (en) 2011-06-03 2011-06-03 Sliding door interlock opening and shutting equipment

Publications (1)

Publication Number Publication Date
KR20120134768A true KR20120134768A (en) 2012-12-12

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Family Applications (1)

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KR1020110053912A KR20120134768A (en) 2011-06-03 2011-06-03 Sliding door interlock opening and shutting equipment

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016021982A1 (en) * 2014-08-08 2016-02-11 박승규 Hinged door for space utilization
WO2016126067A1 (en) * 2015-02-02 2016-08-11 (주)삼현케미칼 Sliding and swing-type functional room door
KR20180121104A (en) * 2017-04-28 2018-11-07 유한회사 입소문하우징 A sliding door provided with an integrated interlocking device
KR20180128256A (en) * 2017-05-23 2018-12-03 유한회사 입소문하우징 Interlocking device for sliding doors
KR20180130798A (en) * 2017-05-30 2018-12-10 김성만 Double gears and 3-point meshing gear box for doors using the same
CN110242342A (en) * 2019-07-17 2019-09-17 贵州大学 A kind of dual protrusion-dispelling air door facilitating control air quantity
CN110656836A (en) * 2018-06-29 2020-01-07 比亚迪股份有限公司 Door opening and closing device, door assembly and have its vehicle
CN110656840A (en) * 2018-06-29 2020-01-07 比亚迪股份有限公司 Electric telescopic vehicle door and vehicle with same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016021982A1 (en) * 2014-08-08 2016-02-11 박승규 Hinged door for space utilization
WO2016126067A1 (en) * 2015-02-02 2016-08-11 (주)삼현케미칼 Sliding and swing-type functional room door
KR20180121104A (en) * 2017-04-28 2018-11-07 유한회사 입소문하우징 A sliding door provided with an integrated interlocking device
KR20180128256A (en) * 2017-05-23 2018-12-03 유한회사 입소문하우징 Interlocking device for sliding doors
KR20180130798A (en) * 2017-05-30 2018-12-10 김성만 Double gears and 3-point meshing gear box for doors using the same
CN110656836A (en) * 2018-06-29 2020-01-07 比亚迪股份有限公司 Door opening and closing device, door assembly and have its vehicle
CN110656840A (en) * 2018-06-29 2020-01-07 比亚迪股份有限公司 Electric telescopic vehicle door and vehicle with same
CN110656836B (en) * 2018-06-29 2021-11-12 比亚迪股份有限公司 Door opening and closing device, door assembly and have its vehicle
CN110242342A (en) * 2019-07-17 2019-09-17 贵州大学 A kind of dual protrusion-dispelling air door facilitating control air quantity

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