KR20170027987A - Open auxiliary device for sliding window - Google Patents

Open auxiliary device for sliding window Download PDF

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Publication number
KR20170027987A
KR20170027987A KR1020150124675A KR20150124675A KR20170027987A KR 20170027987 A KR20170027987 A KR 20170027987A KR 1020150124675 A KR1020150124675 A KR 1020150124675A KR 20150124675 A KR20150124675 A KR 20150124675A KR 20170027987 A KR20170027987 A KR 20170027987A
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KR
South Korea
Prior art keywords
housing
arm
window frame
locking member
opening
Prior art date
Application number
KR1020150124675A
Other languages
Korean (ko)
Other versions
KR102024764B1 (en
Inventor
양성만
이판대
Original Assignee
(주)엘지하우시스
주식회사 대현상공
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.)
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Publication date
Application filed by (주)엘지하우시스, 주식회사 대현상공 filed Critical (주)엘지하우시스
Priority to KR1020150124675A priority Critical patent/KR102024764B1/en
Publication of KR20170027987A publication Critical patent/KR20170027987A/en
Application granted granted Critical
Publication of KR102024764B1 publication Critical patent/KR102024764B1/en

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    • 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
    • E05F7/00—Accessories for wings not provided for in other groups of this subclass
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/08—Locks or fastenings for special use for sliding wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/02—Fastening devices with bolts moving pivotally or rotatively without latching action
    • E05C3/06—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member moving otherwise than rigidly with the bolt
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C9/00—Arrangements of simultaneously actuated bolts or other securing devices at well-separated positions on the same wing
    • 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
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/53—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by horizontal movement

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wing Frames And Configurations (AREA)

Abstract

The present invention relates to an auxiliary opening device for a sliding window so as to easily open a window frame, including: a housing having a space formed therein; an arm rotationally installed in the inner space of the housing, and having one end exposed to the outside of the housing and protruding from the inner lateral side of a window frame adjacent to the housing as the arm rotates based on one end positioned inside the housing; a locking member rotationally installed in the inner space of the housing, and deactivated from a locking state in such a manner that the locking member rotates by rotation of the arm; and a cover coupled to the housing and blocking opening of the inner space of the housing.

Description

[0001] OPEN AUXILIARY DEVICE FOR SLIDING WINDOW [0002]

More particularly, the present invention relates to an opening assisting apparatus for a sliding window, and more particularly, to a door assisting apparatus for a sliding window which is capable of not only releasing a locking member from a locked state by a rotation of a handle but also rotating an arm, And an opening assisting device for a sliding window so that the frame can be easily opened.

Various windows are provided inside and outside of the building for the purpose of access control and mining.

At this time, the window can be divided into a sliding type, a hinged type or a fixed type according to an opening and closing method, and a sliding window window, that is, a sliding window, forms a mainstay of a middle and large window installed in a living room and a veranda of a house.

Such a sliding window is opened and closed by sliding in the lateral direction as the roller at the lower end of the window frame rotates on the rail of the window frame frame when the handle provided on the window frame is held or pulled to one side.

In recent years, in order to improve the insulation performance in the middle and large-sized sliding window, thick glass or double-layer glass is applied to the window frame to improve the insulation performance. In addition to the load of the window pane and the noise- There is a problem in that it is not easy to slide the window frame by pushing or pulling the window frame in a state where the window frame and the airtight means are in close contact with each other while gripping the handle,

In order to solve the above problem, Korean Patent Application Laid-Open No. 20-2010-0012532 (published on Dec. 17, 2010) has been proposed.

Korean Unexamined Utility Model Application Publication No. 20-2010-0012532 discloses an apparatus for forming an opening device rack in a slide bar formed with a rack to be engaged with a pinion coupled to a handle provided to drive a lock device, A door opening / closing device for a door frame, comprising: a body fixed to a door frame in a state of being inserted in a rail groove; and an arm pin rotatably mounted on the body, A plurality of pinion projections engageable with the rack for the opening device, rollers assembled to the ends of the arms, and a plurality of pinion projections which are brought into contact with the vertical portions of the arms in a state where the arms are fixed to the bodies so as to be resiliently supported inside the bodies It consists of a leaf spring installed.

In the Korean Public Utility Model No. 20-2010-0012532 as described above, when the handle provided on the door frame is rotated, the arm is rotated together with the handle so that the door frame is separated from the door frame frame, so that the opening of the middle and large- I could.

However, the Korean Utility Model Publication No. 20-2010-0012532 mentioned above has a complicated structure due to the combination of the locking device and the opening device driven by the handle, There is a problem that it takes a considerable amount of time to operate the opening device since the rear opening device must be operated.

In order to simplify the structure and to shorten the time required for operating the opening device, there has been attempted to develop an opening assist device for a sliding window in the related field for the reasons mentioned above. However, to be.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a locking device and an opening device driven by a handle in a conventional opening assist device for a sliding window, The opening assistance device for a sliding window is provided.

In addition, since the locking device and the opening device, which are driven by the handle, are provided in the opening assisting device for sliding window according to the present invention, it is necessary to operate the opening device after the lock device is released, And it is an object of the present invention to provide an opening assist device for a sliding window which can solve the problem that has been consumed.

According to an aspect of the present invention, there is provided an opening assisting apparatus for a sliding window, comprising: a housing having a space therein; An arm rotatably installed in an inner space of the housing and projecting toward an inner side of an adjacent window frame frame at one end exposed to the outside of the housing as the window is rotated about an inner end of the housing; A locking member rotatably installed in the inner space of the housing, the locking member being rotated by rotation of the arm to be released from the locked state; And a cover coupled to the housing to block the opening of the inner space of the housing.

The housing is mounted inside one side of the window frame adjacent to the inner side surface of the window frame frame.

The housing may be coupled to the window frame frame by screwing.

The arm has a through hole through which the central axis of the handle is inserted at one end located inside the housing.

The through hole may be formed in a polygonal shape.

The arm includes a plurality of gears formed at intervals on an outer circumferential surface of one end located inside the housing.

The arm may include a roller at one end exposed to the outside of the housing.

The roller may have a U-shaped groove formed on the outer circumferential surface thereof.

The locking member is released from the locked state as the engagement with the stopper is released by the descent of the movable member due to the rotation of the arm.

The movable member has at least one or more open grooves engaging with a portion of a gear provided on the arm.

The upper end of the movable member is elastically supported by the elastic member, and is automatically returned from the lowered state to the previous state by the elasticity of the elastic member.

The lower end of the stopper is resiliently supported by the elastic member, and the elasticity of the elastic member automatically returns to the previous state from the state where the engagement with the locking member is released.

The locking member has an end located on the inside of the housing and is elastically supported by the elastic member, so that the elastic member elastically returns from the released state to the previous state automatically.

The cover has an opening that communicates with a through hole provided in the arm.

The cover can be coupled to the housing by screwing.

The opening assisting apparatus for a sliding window according to the present invention is provided with a releasable locking member and an arm projecting to the side surface side in the window frame frame together in the housing. Since the structure is simplified compared to a separate locking apparatus and opening apparatus, Can be facilitated.

In addition, since the lock assisting apparatus for a sliding window according to the present invention advances both the release of the locking member and the projection of the arm simultaneously by the rotation of the handle, the locking device and the opening device are sequentially operated, Can be shortened.

1 is a perspective view showing the appearance of an opening assisting apparatus for a sliding window according to the present invention.
2 is an exploded perspective view for explaining a structure of an opening assisting apparatus for a sliding window according to the present invention.
3 is a cross-sectional view for explaining a structure of an opening assisting apparatus for a sliding window according to the present invention.
4 is a view showing a state in which a window frame to which an opening assisting apparatus for a sliding window according to the present invention is applied is closed;
5 is a view showing an open state of a window frame to which an opening assisting apparatus for a sliding window according to the present invention is applied.
6 is an exemplary view for explaining the projection of the arm in the opening assisting apparatus for a sliding window according to the present invention;
7 is an exemplary view for explaining the release of the locking member in the opening assisting apparatus for a sliding window according to the present invention;
8 is an exemplary view for explaining the descent of the movable member in the opening assisting apparatus for a sliding window according to the present invention.
Fig. 9 is an exemplary view for explaining disengagement of a stopper in an opening assisting apparatus for a sliding window according to the present invention; Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the opening assisting apparatus A for a sliding window according to the present invention includes a housing 10, an arm 20, a locking member 30, and a cover 40. As shown in Figs.

A space is formed in the housing 10.

A space is formed in the housing 10 so that the arm 20 and the locking member 30 can be installed inside the housing 10.

The housing 10 is mounted inside the window frame 200 adjacent to the inner surface of the window frame 100.

The housing 10 is mounted on one side of the window frame 200 so that the central axis 310 of the handle 300 mounted on one side of the window frame 200 is positioned inside the housing 10 The arm 20 can be rotated by the rotation of the handle 300 when the arm 20 is engaged with one end of the arm 20.

Meanwhile, the housing 10 can be coupled to the screen frame 200 by fastening screws (not shown).

The housing 10 can be detached from the window frame 200 by being engaged with the window frame 200 by screwing the window frame 10 into the housing 10 and the window frame 200, The bonding state is firmly maintained.

The arm 20 is rotatably installed in the inner space of the housing 10 and has one end exposed to the outside of the housing 10 as it rotates about one end located inside the housing 10 And protrudes toward the inner side of the adjacent window frame 100.

The arm 20 preferably has a through hole 21 into which the center shaft 310 of the handle 300 located in the housing 10 is inserted.

The arm 20 is provided with the through hole 21 so that the center shaft 310 of the handle 300 is inserted into the through hole 21 so that the handle 300 and the arm 20 are connected And the arm (20) can be rotated by the rotation of the handle (300).

At this time, it is preferable that the through hole 21 is formed in a polygonal shape such as a quadrangle.

The through hole 21 is formed in a polygonal shape so that the center axis 310 of the handle 300 is formed into a polygonal shape and inserted into the through hole 21, The arm 20 is smoothly rotated by the rotation of the handle 200 because idling of the center shaft 310 is prevented.

The arm 20 preferably includes a plurality of gears 22 spaced apart from each other on the outer circumferential surface of the one end located inside the housing 10.

As the arm 20 is provided with the gear 22 and the arm 20 is rotated in a state where a part of the gear 22 is engaged with the opening groove 51 of the movable member 50 The movable member 50 can be lowered.

The arm 20 may be provided with a roller 23 at one end exposed to the outside of the housing 10.

The arm 20 is provided with the roller 23 so that when one end of the arm 20 protrudes toward the inner side surface of the window frame 100 and contacts the inner surface of the window frame 100, The rotation of the window frame 100 prevents the window frames 100 from being damaged.

Here, the roller 23 may have a U-shaped groove 23a formed on the outer circumferential surface thereof.

As the 'U' shaped groove 23a is formed in the roller 23, the rail 110 provided on the inner side surface of the window frame 100 is received in the U 'shaped groove 23a, The contact between the door frame 20 and the inner side surface of the window frame 100 is stabilized.

The locking member 30 is rotatably installed in the inner space of the housing 10 and is rotated by the rotation of the arm 20 to be released from the locked state.

The locking member 30 is released from the locked state as the engagement with the stopper 60 is released by the lowering of the movable member 50 due to the rotation of the arm 20. [

Therefore, when the arm 20 is not rotated, the stopper 60 is held by the locking member 30 when the movable member 50 is in the raised state, so that the locking member 30 is kept in the locked state .

At this time, the locking member 30 is inserted into the striker 120 which is fixed to the inner side surface of the window frame 100, so that the opening of the window frame 200 is blocked Of course.

In addition, one end of the locking member 30 located inside the housing 10 is preferably elastically supported by the elastic member 32.

The one end of the locking member 30 is elastically supported by the elastic member 32 so that the elasticity of the elastic member 32 in the state where the locking member 30 is released The locking member 30 is automatically returned to the state before release.

Since the elasticity of the elastic member 32 is less than the external force applied to the arm 20 and the locking member 30 by the rotation of the handle 300, the arm 20 and the locking member 30, Of course, only when the handle 300 is in the unturned state from when the handle 300 is switched to the unturned state.

It is preferable that the movable member 50 includes at least one opening groove 51 which engages with a part of the gear 22 of the arm 20.

The movable member 50 is provided with the opening groove 51 so that when the arm 20 rotates in a state where a part of the gear 22 of the arm 20 is engaged with the opening groove 51, (50) is lowered.

At this time, it is preferable that the upper end of the movable member (50) is elastically supported by the elastic member (52).

The upper end of the movable member 50 is resiliently supported by the elastic member 52 so that the resilience of the elastic member 52 in the state where the movable member 50 is lowered, The movable member 50 is automatically returned from the lowered state to the previous state.

Since the elasticity of the elastic member 52 is less than the external force exerted on the arm 20 and the movable member 50 by the rotation of the handle 300, the arm 20 and the movable member 50, Of course, only when the handle 300 is in the unturned state from when the handle 300 is switched to the unturned state.

The lower end of the stopper 60 is preferably elastically supported by an elastic member 61.

The lower end of the stopper 60 is resiliently supported by the elastic member 61 so that the elasticity of the elastic member 61 is released from the stopper 60 when the stopper 60 is released from engagement with the locking member 30. [ 60, the stopper 60 is automatically returned from the state in which the engagement with the locking member 30 is released to the previous state.

Since the elasticity of the elastic member 61 is less than the external force applied to the arm 20, the movable member 50 and the stopper 60 by the rotation of the handle 300, Of course, only when the movable member 50 and the stopper 60 are not in an external force, that is, when the handle 300 is switched to the pre-rotation state, to be.

The cover 40 is coupled to the housing 10 to block the opening of the inner space of the housing 10.

The cover 40 prevents the opening of the inner space of the housing 10 so that the arm 20 and the locking member 30 installed in the inner space of the housing 10 are prevented from being separated or damaged.

The cover 40 may include an opening 41 communicating with the through hole 21 formed in the arm 20.

The cover 40 is provided with the opening 41 so that the center axis 310 of the handle 300 is inserted into the through hole 21 through the opening 41, The arm 20 can be rotated by the rotation.

Meanwhile, the cover 40 may be coupled to the housing 10 by fastening screws (not shown).

It is possible to separate the cover 40 from the housing 10 by engaging the cover 40 with the housing 10 by screwing so that the coupling state of the cover 40 and the housing 10 Strongly maintained.

The opening of the screen frame 200 to which the opening assisting apparatus A for a sliding window according to the present invention is applied will be described in detail as follows.

The housing 10 may be mounted on one side of the window frame 200 adjacent to the inner side of the window frame 100. The handle 300 may be mounted on one side of the window frame 200, The center axis 310 of the arm 20 can be inserted into the through hole 21 of the arm 20 installed inside the housing 10.

6, one end of the arm 20, which is pivoted and exposed to the outside of the housing 10, protrudes to the inner side of the window frame 100, as shown in FIG. 6 The window frame 200 is spaced apart from the window frame 100 in the opening direction by a reaction force generated when the arm 20 and the window frame 100 are brought into contact with each other.

When the handle 300 is pushed or pulled in the process of separating the window frame 100 from the window frame 100 to advance the window frame 200 in the opening direction, 200 can be slid laterally, so that the screen frame 200 is simply opened as shown in FIG.

However, in the present invention, the locking member 30 is installed in the housing 10 together with the arm 20, so that the window frame 200 is closed as shown in FIG. 4, When the hook 31 of the locking pawl 200 is inserted into the striker 120 fixed to the inner side of the window frame 100, The side frame 200 can not be opened because lateral sliding is not possible.

However, in the present invention, the gear 22 on the outer peripheral surface of the one end of the arm 20 is engaged with the opening groove 51 of the movable member 50 provided in the housing 10 as shown in Fig. 8 All.

9, the stopper 60 is lowered by the lowering of the movable member 50, and the stopper 60 is lowered as shown in FIG. 9 by the lowering of the movable member 50, The engagement of the stopper 60 and the locking member 30 is released by the descent of the locking member 60 so that the locking member 30 can be released from the locked state as shown in Fig. The screen frame 200 can be smoothly opened without interference by the screen 30.

In the above description, only the opening of the sliding window has been described. However, it is needless to say that the same effect as described above can be obtained when the opening assist device A for sliding window according to the present invention is applied to a sliding door.

As described above, the opening assisting apparatus A for a sliding window according to the present invention is characterized in that the locking member 30 which is releasable in the housing 10 and the arm 20 which can be projected to the side surface inside the window frame 100 Since the structure of the locking device and the opening device are separately provided, the construction and simplification of the structure can be facilitated and the rotation of the handle 300 allows the locking member 30 to be released and the arm 20 ) Protrudes at the same time, so that the time required for operating the opening device can be shortened as compared with the sequential operation of the locking device and the opening device.

As described above, the present invention is not limited to the above-described embodiments, and can be modified without departing from the gist of the present invention as claimed in the claims. And falls within the scope of protection of the invention.

10: housing 20: arm
21: through hole 22: gear
23: roller 23a: 'U' shaped groove
30: locking member 31:
32: elastic member 40: cover
41: opening 50: movable member
51: open groove 52: elastic member
60: stopper 61: elastic member
100: window frame frame 110: rail
120: Striker 200: Thick frame
300: handle 310: center axis
A: Opening aid for sliding window

Claims (15)

A housing having a space therein;
An arm rotatably installed in an inner space of the housing and projecting toward an inner side of an adjacent window frame frame at one end exposed to the outside of the housing as the window is rotated about an end located inside the housing;
A locking member rotatably installed in the inner space of the housing, the locking member being rotated by rotation of the arm to be released from the locked state;
And a cover coupled to the housing to block the opening of the inner space of the housing.
The method according to claim 1,
Wherein the housing is mounted inside one side of the window frame adjacent to the inner side surface of the window frame frame.
The method according to claim 1,
And the housing is coupled to the window frame frame by screwing.
The method according to claim 1,
Wherein the arm has a through hole through which the central axis of the handle is inserted at one end located on the inner shaft of the housing.
5. The method of claim 4,
Wherein the through hole is formed in a polygonal shape.
The method according to claim 1,
Wherein the arm includes a plurality of gears formed at intervals on an outer circumferential surface of one end located inside the housing.
The method according to claim 1,
Wherein the arm is provided with a roller at one end exposed to the outside of the housing.
8. The method of claim 7,
Wherein the roller has a U-shaped groove formed in the outer circumferential surface thereof.
The method according to claim 1,
And the locking member is released from the locked state as the engagement with the stopper is released by the lowering of the movable member by the rotation of the arm.
10. The method of claim 9,
Wherein the movable member has at least one open groove engaged with a part of a gear provided on the arm.
10. The method of claim 9,
Wherein the movable member is elastically supported at its upper end by an elastic member so that the movable member is automatically returned from a lowered state to a previous state by elasticity of the elastic member.
10. The method of claim 9,
Wherein the lower end of the stopper is elastically supported by an elastic member so that the stopper is automatically returned from the state in which the engagement with the locking member is released by the elasticity of the elastic member to the previous state.
The method according to claim 1,
Wherein one end of the locking member located inside the housing is resiliently supported by an elastic member to automatically return from the released state to the previous state by elasticity of the elastic member.
The method according to claim 1,
Wherein the cover has an opening for communicating with a through hole provided in the arm.
The method according to claim 1,
And the cover is coupled to the housing by screwing.
KR1020150124675A 2015-09-03 2015-09-03 Open auxiliary device for sliding window KR102024764B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150124675A KR102024764B1 (en) 2015-09-03 2015-09-03 Open auxiliary device for sliding window

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Application Number Priority Date Filing Date Title
KR1020150124675A KR102024764B1 (en) 2015-09-03 2015-09-03 Open auxiliary device for sliding window

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KR20170027987A true KR20170027987A (en) 2017-03-13
KR102024764B1 KR102024764B1 (en) 2019-09-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019015112A (en) * 2017-07-07 2019-01-31 中央発條株式会社 Assisting device for sash
JP2019152026A (en) * 2018-03-02 2019-09-12 Ykk Ap株式会社 Opening assist device and opening device
KR20230122449A (en) * 2022-02-14 2023-08-22 주식회사 대동윈테크 Door lock system with push open function

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KR102365845B1 (en) 2020-06-12 2022-02-22 최상운 Open auxliary device for sliding window
KR20230109040A (en) 2022-01-12 2023-07-19 최상운 Open auxliary device for sliding window
KR102480070B1 (en) 2022-04-11 2022-12-21 주식회사 락센 Lock device for sliding window with easy door opening
KR20240000316A (en) 2022-06-23 2024-01-02 주식회사 락센 Lock device for sliding window with easy door opening
KR20240002102A (en) 2022-06-28 2024-01-04 주식회사 락센 Lock device for sliding window with easy door opening
KR20240006390A (en) 2022-07-06 2024-01-15 주식회사 락센 Lock device for sliding window with easy door opening

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JPH0928007A (en) * 1995-07-10 1997-01-28 Nifco Inc Latch lock device
JP2003013634A (en) * 2001-07-03 2003-01-15 Shin Nikkei Co Ltd Sliding door opening device
KR20080004018U (en) * 2007-03-16 2008-09-19 주식회사 대현상공 Automatic opening apparatus for sliding door
KR20100012532U (en) * 2009-06-09 2010-12-17 주식회사 대현상공 Handle interlocking type opening apparatus for sliding door
JP2014029096A (en) * 2012-07-31 2014-02-13 Sankyotateyama Inc Sliding door opening assist device and sliding door

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0928007A (en) * 1995-07-10 1997-01-28 Nifco Inc Latch lock device
JP2003013634A (en) * 2001-07-03 2003-01-15 Shin Nikkei Co Ltd Sliding door opening device
KR20080004018U (en) * 2007-03-16 2008-09-19 주식회사 대현상공 Automatic opening apparatus for sliding door
KR20100012532U (en) * 2009-06-09 2010-12-17 주식회사 대현상공 Handle interlocking type opening apparatus for sliding door
JP2014029096A (en) * 2012-07-31 2014-02-13 Sankyotateyama Inc Sliding door opening assist device and sliding door

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019015112A (en) * 2017-07-07 2019-01-31 中央発條株式会社 Assisting device for sash
JP2019152026A (en) * 2018-03-02 2019-09-12 Ykk Ap株式会社 Opening assist device and opening device
KR20230122449A (en) * 2022-02-14 2023-08-22 주식회사 대동윈테크 Door lock system with push open function

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