EP4019727A1

EP4019727A1 - Damper assembly for lift sliding window/door

Info

Publication number: EP4019727A1
Application number: EP21215449.6A
Authority: EP
Inventors: Jang Woo Lee; Sang Do Lee; Young Bong Yoo; Ji Hoon Kim
Original assignee: 3g Technologies Co Ltd; 3G Tech Co Ltd
Current assignee: 3g Technologies Co Ltd; 3G Tech Co Ltd
Priority date: 2020-12-22
Filing date: 2021-12-17
Publication date: 2022-06-29
Anticipated expiration: 2041-12-17
Also published as: EP4019727B1; KR102310039B1

Abstract

A damper assembly for a lift sliding window/door is disclosed. The damper assembly for a lift sliding window/door according to the present disclosure, configured to, when a handle is unlocked, ascend from a lower frame to be slidable for opening and closing, and when the handle is locked, descend to be refrained from sliding, including: a fixing protrusion installed to an upper frame; a first bracket installed on the upper surface of the window/door; a movable body having one end axially-coupled to the first bracket such that the other end thereof rotates in the elevating direction of the window/door with reference to the first bracket; a damping part provided on the movable body to engage with the fixing protrusion during the sliding operation of closing the window/door, so as to reduce the sliding speed; and a second bracket installed on the upper surface of the window/door such that an engagement between the damping part and the fixing protrusion is maintained in response to the elevation of the window/door, the second bracket performing regulation such that the other end of the movable body rotates in a predetermined range. According to the present disclosure, the impact noise and physical injury caused by acceleration when the window/door is closed can be prevented by the damping part, and the engagement between the fixing protrusion and the damping part can be stably maintained by the rotation of the movable body, thereby enabling smooth opening operation of the window/door with light force. Further, the damper assembly not only allows easy and simple installation even in a small space but also allows easy maintenance due to the simple structure thereof, in spite of the damping part being provided thereon.

Description

BACKGROUND OF THE INVENTION

1. Field of the invention

The present disclosure relates to a damper assembly for a lift sliding window/door and, more specifically, to a damper assembly for a lift sliding window/door, wherein the same is applied to a lift sliding window/door which slides upwards from a lower frame or is prevented from sliding when a handle is unlocked or locked, thereby preventing door-related injuries or reducing impact noise when the window/door is opened/closed, and facilitating convenient use.

2. Description of the Prior Art

A sliding window or sliding door refers to a sliding-type window/door fitted to upper and lower frames fixed to a structure such that the same slides laterally, thereby opening or closing a delimited space.
Such a sliding-type window/door has a door frame configured to be opened or closed through sliding, and is characterized in that, as a result of improved window/door technology, sliding by rollers proceeds with little force in a smooth and quick manner without deceleration.
However, windows/doors have become gradually heavier due to heat insulation requirements or the like and thus have a problem in that the inertial force of a windows/door accelerates the same excessively during opening/closing processes, the window/door may collide with a side frame or another window/door, thereby causing impact noise or damage, and fingers, toes, or other body parts are frequently to get stuck in door gaps and injured thereby.
In this regard, Korean Patent Registration No. 10-1559676 (date of publication: September 11, 2014) discloses a technology regarding a slider buffering device having an expanded damper container.
The above-mentioned prior art is characterized by including a guide groove fixed to a door frame or the like of a sliding door so as to guide movements of a hook, a case provided with a damper container, a damper installed in the damper container of the case, a hook mounted on a rod front end of the damper, a catch being inserted into the hook and fixed to a slider including the sliding door, and a tension spring having one end fixed to the hook and the other end fixed to the case such that the damper is returned.
The above-mentioned prior art is advantageous in that, since the damper container of the case supports the damper in two directions (upwards/downwards) only, a pneumatic or hydraulic damper having a relative parge specification can be employed in a limited space; there is little concern of oil leakage and malfunction of the pneumatic or hydraulic damper, thereby facilitating cleanness of the buffering device periphery, long-term use is possible, and manufacturing costs are reduced.
However, the buffering device of the prior art has a problem in that normal operations are possible only if the distance between the upper frame and the upper door frame is constant along the door sliding direction.
That is, the hook and the catch that initiates operation of the buffering device of the prior art are fixed to each other in predetermined positions. If the distance between the upper frame and the upper door frame is no longer constant because one of the upper frame and the upper door frame has deviated from the correct position after a long period of time or due to impacts, or because foreign materials get stuck in the window frames, the relative height of the hook decreases such that the catch passes without engaging with the hook, or the relative height of the hook increases such that the catch collides with the case.
In addition, in the case of a recent lift sliding window/door which ascends in response to a handle rotating operation and thus slides to be opened/closed, or descends and is prevented from sliding, the up/down interval between the door frame and the window/door varies within 1cm. This poses a problem in that the fixed hook and catch applied to the prior art described above easily detach while the window/door ascends/descends and fail to correctly buffer impacts.

[Patent Document]

Korean Registered Patent No. 10-1559676 (date of publication: September 11, 2014)

SUMMARY OF THE INVENTION

It is an aspect of the present disclosure to provide a damper assembly for a lift sliding window/door, wherein a damping structure is configured in a noncomplicated simple structure such that the same can be installed conveniently, door-related injuries and impact noise caused by acceleration occurring when the window/door is closed can be prevented, and stable and accurate damping operations are guaranteed even if the interval between the upper or lower frame and the window/door is distorted or varied for various reasons.
In accordance with an aspect, the present disclosure provides a damper assembly for a lift sliding window/door configured to, when a handle is unlocked, ascend from a lower frame to be slidable for opening and closing, and when the handle is locked, descend to be refrained from sliding, the damper assembly including: a fixing protrusion installed to an upper frame; a first bracket installed on the upper surface of the window/door; a movable body having one end axially-coupled to the first bracket such that the other end thereof rotates in the elevating direction of the window/door with reference to the first bracket; a damping part provided on the movable body to engage with the fixing protrusion during a sliding operation of closing the window/door, so as to reduce the sliding speed; and a second bracket installed on the upper surface of the window/door such that an engagement between the damping part and the fixing protrusion is maintained in response to the descent of the window/door, so as to perform regulation such that the other end of the movable body rotates in a predetermined range.
The damping part may include: a damper configured to be extended or contracted while being mounted on the movable body, to reduce the sliding speed of the window/door; and a hook member rotatably axially-coupled to an operational end of the damper to engage with the fixing protrusion before the open window/door is closed.
The damper may include: a cylinder installed inside the movable body; a piston rod configured to perform a decelerating operation when extended from the cylinder and perform an accelerating operation when contracted thereto; and a rotating part axially-coupled to the hook member.
The hook member may include: an engaging groove into which the fixing protrusion is introduced to be stably placed thereon; an engaging protrusion formed on one end of the engaging groove such that the fixing protrusion is engaged therewith; and a guide protrusion configured to move along a guide groove inside the movable body, when the piston rod is contracted, induce engagement or disengagement between the engaging protrusion and the fixing protrusion by rotating the hook member, and when the piston rod is extended, induce such that the engagement between the hook member and the fixing protrusion is maintained.
The fixing protrusion may protrude from the lower surface of a sliding block inserted and installed to be obliquely movable with respect to a support frame fixed to the upper frame, and is vertically adjusted by an adjustment screw penetrating the lower end of the support frame to be screw-coupled thereto and configured to elevate the sliding block according to the forward/reverse rotation thereof.
The movable body may include: a movable pin coupled to the other end of the movable body to be fitted into a vertically long hole formed through the second bracket and configured to slide according to the guide of the long hole to regulate the rotation of the movable body; and a bushing interposed between the movable pin and the long hole to facilitate the sliding of the movable pin.
Each of the fixing protrusion and the engaging groove may include a permanent magnet generating a magnetic force to maintain smooth engagement and engaging force between the fixing protrusion and the engaging groove.
According to the present disclosure, a movable body configured to rotate in the elevating direction of a window/door with reference to a first bracket installed on the upper surface of the window/door, a damping part provided on the movable body to engage with a fixing protrusion during a sliding operation of closing the window/door so as to reduce the sliding speed, and a second bracket installed on the upper surface of the window/door such that the other end of the movable body is regulated so as to rotate in a predetermined range, are organically coupled with one another. Accordingly, the damping part can prevent door-related injuries and impact noise resulting from acceleration occurring when the window/door is closed, and even if the interval between the upper or lower frame and the window/door is distorted or varied for various reasons, rotation of the movable body can maintain stable engagement between the fixing protrusion and the damping part. This is advantageous in that window/door opening operations can be performed with little force, and the simple structure, despite the damping part provided, guarantees easy installation even in a narrow space and facilitates maintenance and management.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view showing a structure of a window/door to which a damper assembly for a lift sliding window/door according to an embodiment of the present disclosure is installed;
FIG. 2 is an exploded perspective view of the damper assembly according to the present disclosure, shown in FIG. 1;
FIG. 3 is a perspective view and a cross-sectional view showing a state in which a fixing protrusion and a hook member are engaged with each other before an open window/door is closed;
FIG. 4 is a perspective view and a cross-sectional view subsequent to FIG. 3, showing a state of a completely closed window/door in a decelerated state by an operation of a damper extended according to the engagement between the fixing protrusion and the hook member;
FIG. 5 is a perspective view and a cross-sectional view subsequent to FIG. 4, showing an operating state when a handle is locked to suppress the sliding of the completely closed window/door;
FIG. 6 is a perspective view and a cross-sectional view subsequent to FIG. 5, showing an operating state when the handle is unlocked for the sliding of the completely closed window/door;
FIG. 7 is a perspective view and a cross-sectional view subsequent to FIG. 6, showing a state in which the opening of the window/door is accelerated by an operation of the damper contracted according to the opening of the closed window/door and the fixing protrusion and the hook member are separated from each other; and
FIG. 8 is a perspective view and a cross-sectional view subsequent to FIG. 7, showing an open state of the window/door in which the hook member is completely separated from the fixing protrusion.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, in describing the present disclosure, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present disclosure.
FIG. 1 is a perspective view showing a structure of a window/door to which a damper assembly for a lift sliding window/door according to an embodiment of the present disclosure is installed, FIG. 2 is an exploded perspective view of the damper assembly according to the present disclosure, shown in FIG. 1, FIG. 3 is a perspective view and a cross-sectional view showing a state in which a fixing protrusion and a hook member are engaged with each other before an open window/door is closed, FIG. 4 is a perspective view and a cross-sectional view subsequent to FIG. 3, showing a state of a completely closed window/door in a decelerated state by an operation of a damper extended according to the engagement between the fixing protrusion and the hook member, FIG. 5 is a perspective view and a cross-sectional view subsequent to FIG. 4, showing an operating state when a handle is locked to suppress the sliding of the completely closed window/door, FIG. 6 is a perspective view and a cross-sectional view subsequent to FIG. 5, showing an operating state when the handle is unlocked for the sliding of the completely closed window/door, FIG. 7 is a perspective view and a cross-sectional view subsequent to FIG. 6, showing a state in the opening of the window/door is accelerated by an operation of the damper contracted according to the opening of the closed window/door and the fixing protrusion and the hook member are separated from each other, and FIG. 8 is a perspective view and a cross-sectional view subsequent to FIG. 7, showing an open state of the window/door in which the hook member is completely separated from the fixing protrusion.
The X, Y, and Z axes shown in the drawings are arbitrarily set for convenience of explanation, not for the purpose of limiting rights, and are defined that the X-axis indicates the front-back (opening and closing of a window/door) direction, the Y-axis indicates the left-right direction, and the Z-axis indicates the up-and-down (elevating of the window/door) direction. Each direction described below is based on the description above, unless otherwise specifically limited.
A damper assembly 100 for a lift sliding window/door according to the present disclosure is applied to a lift sliding window/door 10 of FIG. 1 which, when a handle 12 is unlocked, ascends from the lower frame and is slidable for opening and closing, and when the handle 12 is locked, descends to be refrained from sliding.
The damper assembly 100 according to the present disclosure has been made not only to prevent the impact noise and physical injury caused by acceleration when the lift sliding window/door 10 described above is closed, but also to maintain a stable engagement between the fixing protrusion 110 and the damping part 140 by the rotation of a movable body 130 even if the interval between the window/door 10 and the upper frame 20 or the lower frame is distorted or changed due to the elevating operation of the window/door 10 or various causes and enable easy and simple installation thereof even in a small space.
In order to specifically implement the functions or effects as described above, the damper assembly 100 according to the embodiment of the present disclosure may include, as shown in FIG. 2, a fixing protrusion 110, a first bracket 120, a movable body 130, a damping part 140, a second brackets 150, and the like.
The fixing protrusion 110, the first bracket 120, the movable body 130, the damping part 140, the second bracket 150, and the like according to the present disclosure may be injection-molded using an engineering plastic material, such as polycarbonate (PC) with excellent impact resistance, heat and cold resistance, high strength and weather resistance, M/C NYLON with durability 7 times that of metal and excellent corrosion resistance, insulation, shock absorption and self-lubrication, and fiberglass-reinforced NYLON66, to facilitate manufacturing, improve productivity, and reduce costs, and may be made of a metal material if necessary.
Hereinafter, each of the above-described elements will be described in detail.
First, the fixing protrusion 110 as an element which is fixedly installed to the upper frame 20 disposed on the upper surface of the frame of the window/door 10 to engage with the hook member 144 to be described later, may be manufactured in a hook shape that automatically engages with the hook member 144 to be described later, moving in the closing direction of the window/door 10.
However, the fixing protrusion 110 according to the embodiment of the present disclosure may have a simple structure having an "L" letter shape overall, bent in the opening direction of the window/door 10 to be fixed to the upper frame 20, and as shown in FIG. 2, etc., the fixing protrusion 110 may further include a support frame 112, a sliding block 114, an adjustment screw 116, etc.
The structure of the fixing protrusion 110 as described above is configured to achieve an accurate engagement between the fixing protrusion 110 and the hook member 144 to be described later by adjusting the height of the fixing protrusion 110 to be fixed to the upper frame 20 even if a spacing distance between the fixing protrusion 110 and the hook member 144 to be described later is different according to the elevation height difference of the elevatable window/door 10, the size difference of the frame of the window/door 10, the deformation of the frame of the window/door 10, or the like.
The support frame 112 is an element having an inner space formed through the central portion thereof to be fixed to the upper frame 20.
The sliding block 114 is an element inserted and installed to be obliquely movable in the inner space formed through the support frame 112, and the above-described hook shaped fixing protrusion 110 may protrude from the lower surface of the sliding block 114.
Here, an elevating protrusion and an inclined elevating groove may be formed on the support frame 112 and the sliding block 114, respectively, such that the elevating movement of the fixing protrusion 110 is accurately guided.
The adjustment screw 116, which is an element penetrating the lower end of the support frame 112 to be screw-coupled thereto, is configured to move forward/backward according to the forward/reverse rotation thereof with respect to the support frame 112 to elevate the sliding block 114, thereby performing a function of variously adjusting the vertical position, that is, the height of the fixing protrusion 110.
At least one of the fixing protrusion 110 described above and an engaging groove 144a to be described later may further include a permanent magnet M generating a magnetic force, as shown in FIG. 2, etc.
The permanent magnets M may form a part of the fixing protrusion 110 and the engaging groove 144a to be described later and may be provided at positions facing each other, respectively, to induce smooth engagement between the fixing protrusion 110 and the hook member 144 (the engaging groove 144a) and to enable an engaging force of the engagement to be firmly maintained without a gap therebetween, thereby preventing noise and the like generated between the fixing protrusion 110 and the engaging groove 144a during a sliding operation of the window/door 10.
The first bracket 120 is an element installed on the upper surface of the window/door 10 and axially-coupled 122 to one end of the movable body 130 to be described later, and thus the other end of the movable body 130 is rotatable in the elevating direction of the window/door 10 by the first bracket 120.
The movable body 130, which is an element provided to prevent the hook member 144 engaged with the fixing protrusion 110 positioned to be fixed to the upper frame 20 from being separated from the fixing protrusion 110 even during the elevating operation of the window/door 10, includes a pair of rod-shaped components symmetrical left and right and is disposed along the longitudinal direction of the upper surface of the window/door 10.
The movable body 130 including a pair of rod-shaped components has one end axially-coupled 122 to the first bracket 120 and the other end coupled to the second bracket 150 to be described later, while accommodating a damping part 140 to be described later in the inner space thereof, and thus to be fixed to the upper end of the window/door 10, and the other end of the movable body 130 is rotatable within a predetermined range with reference to the axial coupling 122.
In this case, the movable body 130 may include a movable pin 134, a bushing 136, and the like to be smoothly rotatable within a predetermined range while being coupled to the second bracket 150 without a gap.
The movable pin 134, which is a rod-shaped element coupled to the other end of the movable body 130 to be fitted into a vertically long hole 152 formed through the second bracket 150, is configured to slide up and down according to the guide of the long hole 152 to regulate the rotation of the movable body 130.
The bushing 136, which is a ring-shaped element provided to facilitate the sliding of the movable pin 134, may be installed to be interposed between the movable pin 134 and the long hole 152 such that the movable pin 134 and the long hole 152 do not contact each other.
The bushing 136 may be made of M/C NYLON excellent in corrosion resistance, insulation, shock absorption, and self-lubrication or TEFLON excellent in water resistance, chemical resistance, heat resistance, and self-lubrication.
As described above, the movable body 130 installed on the upper surface of the window/door 10 by the first bracket 120 and the second bracket 150 rotates together with damping part 140 provided inside the movable body 130, as shown in FIGS. 4 to 6, to perform an operating of relatively raising or lowering the hook member 144, whereby the hook member 144 can maintain the stable engaging state without being separated from the fixing protrusion 110.
The damping part 140 is an element provided in the inner space of the above-described movable body 130 to engage with the fixing protrusion 110 during the sliding operation of closing the window/door 10, so as to reduce the sliding speed. The deceleration due to the engaging operation can prevent the impact noise caused by the opening and closing of the window/door 10 and can effectively prevent the physical injury caused by the closing of the window/door 10.
In order to implement the above-described functions or effects, the damping part 140 may include a damper 142, a hook member 144, and the like, as shown in FIG. 2.
The damper 142, which is an element configured to be extended and contracted while being mounted to the movable body 130 and reduce the sliding speed of the window/door 10, may include a cylinder 142a, a piston rod 142b, a rotating part 142c, and the like.
The cylinder 142a, which is a cylindrical element having a material provided in the inner space thereof to perform buffering against external force, may be installed inside the movable body 130 in parallel with the longitudinal direction of the movable body 130. The buffer material may be a compression spring or a fluid such as air.
The piston rod 142b is a rod-shaped element configured to be linearly extended and contracted with respect to the cylinder 142a.
The inner end of the piston rod 142b is coupled to the compression spring in the cylinder 142a or is configured to compress or expand a fluid such as air such that the damping force in response to the external force is transmitted to the outer end.
The outer end of the piston rod 142b may be coupled to the rotating part 142c to transmit the damping force transmitted through the inner end of the piston rod 142b to the hook member 144. In this case, the rotating part 142c is axially-coupled to the hook member 144 such that the hook member 144 can freely rotate with respect to the piston rod 142b.
As described above, the damper 142 according to the present disclosure, which includes the cylinder 142a and the piston rod 142b to perform a deceleration or damping operation, may be configured to perform a decelerating operation (elastic deformation or generation of reaction force) when piston rod 142b in at least contracted basic state is extended from the cylinder 142a and to perform an accelerating operation (restoration of elasticity or recovery of reaction force) when the same is contracted thereto.
The damper 142 may be configured to perform a decelerating operation not only when the piston rod 142b is extended from the cylinder 142a but also when the same is contracted thereto, as necessary. The damper 142 may be changed to have a variety of damping capabilities and operating methods through application or modification of known techniques related thereto.
The hook member 144, which is an element provided to perform an engaging operation with respect to the fixing protrusion 110 of the upper frame 20 before the open window/door 10 is closed, may be manufactured in a hook shape such that the same automatically engages with the fixing protrusion 110 installed at one point of the upper frame 20 while moving in the closing direction together with the window/door 10.
The hook member 144 according to the embodiment of the present disclosure has an alphabet 'G' shape overall, as shown in FIG. 2, etc., and is axially-coupled to the piston rod 142b described above through the rotating part 142c.
More specifically, the hook member 144 may include an engaging groove 144a, an engaging protrusion 144b, and a guide protrusion 144c.
The engaging groove 144a, which is an element into which the fixing protrusion 110 is introduced to be stably placed thereon by the hook member 144 rotating about the rotating part 142c, as described later, may have a shape corresponding to the fixing protrusion while including a slight operation space.
The engaging protrusion 144b, which is an element formed on one end of the engaging groove 144a to engage with the fixing protrusion 110 first when the window/door 10 is closed, and to be separated from the fixing protrusion lastly when the window/door 10 is opened, is not particularly limited since the same has a protruding shape which can be introduced into the inner space of the fixing protrusion 110.
The guide protrusion 144c, which is an element configured to stably induce a linear motion of the hook member 144 moving according to the extension and contraction of the piston rod 142b and rotate the hook member 144 counterclockwise for an engaging operation between the engaging protrusion 144b and the fixing protrusion 110, protrudes from each of the opposite lower sides of the hook member 144 at a distance from the rotating part 142c to be fitted into the guide groove 132 inside the movable body 130.
The guide groove 132 is a '┌' shaped groove and is divided into a vertical groove and a horizontal groove, as shown in FIG. 2, to perform different functions along with the guide protrusion 144c as follows.
That is, as shown in FIGS. 3 and 7, when the piston rod 142b for leading the hook member 144 is placed in a fully contracted state according to the sliding of the window/door 10, the guide protrusion 144c slides along the guide groove 132 in the vertical direction from the horizontal direction to rotate the hook member 144 counterclockwise.
The hook member 144 rotating counterclockwise as above enables the engaging protrusion 144b to be engaged with the fixing protrusion 110 when the window/door 10 is closed, as shown in FIG. 3, and enables the engaging protrusion 144b engaged with the fixing protrusion 110 as shown in FIG. 7 to be separated from the fixing protrusion 110 when the window/door 10 is opened.
In addition, as described above, in a case where the piston rod 142b performs an operation of being gradually extended even in the fully contracted state as shown in FIG. 3 until the window/door 10 is completely closed as shown in FIG. 4, the guide protrusion 144c slides about the axis of the rotating part 142c along the guide groove 132 in the horizontal direction from the vertical direction, whereby the engaging protrusion 144b of the hook member 144 and the fixing protrusion 110 of the upper frame 20 can maintain a solid engagement with each other.
The second bracket 150, which is an element provided on the upper surface of the window/door 10 to face the first bracket 120 such that the engagement between the damping part 140 and the fixing protrusion 110 is maintained in response to the elevatable window/door 10 descending from a position where the damping part 140 and the fixing protrusion 110 are engaged with each other, may have a vertically long hole 152 formed through one side thereof to allow the movable pin 134 of the movable body 130 to be fitted thereinto.
The long hole 152 of the second bracket 150 may properly regulate the rotational range of the other end of the movable body 130 by guiding and regulating the vertical sliding of the movable pin 134 inserted thereinto.
As described above, when the damper assembly 100 of the present disclosure, including the fixing protrusion 110, the first bracket 120, the movable body 130, the damping part 140, the second bracket 150, and the like, is installed to the lift sliding window/door 10, the following series of operations are performed.
First, as shown in FIG. 3, the fixing protrusion 110 installed to the upper frame 20 is automatically engaged with the hook member 144 of the damping part 140 before the open window/door 10 is closed.
Next, as shown in FIG. 4, the damping part 140 reduces the sliding speed of the window/door 10 through the piston rod 142b continuously extended until the closing window/door 10 reaches a side frame 30.
Next, as shown in Figure 5, when the window/door 10 is completely closed, a user lowers the window/door 10 by rotating (locking) the handle 12, in order to suppress the sliding of the closed window/door 10.
At this time, the spacing distance between the upper frame 20 to which the fixing protrusion 110 is installed and the window/door 10 at which the hook member 144 is located increases, but the hook member 144 can maintain the stable engagement with the fixing protrusion 110 by means of the movable body 130 which rotates about the axis of the first bracket 120, and the rotation of which is restricted and guided by the second bracket 150.
Next, as shown in FIG. 6, the user raises the window/door 10 by rotating (unlocking) the handle 12, in order to open the window/door 10 that has been refrained from sliding.
At this time, the spacing distance between the upper frame 20 to which the fixing protrusion 110 is installed and the window/door 10 at which the hook member 144 is located decreases, but the hook member 144 can maintain the stable engagement with the fixing protrusion 110 by means of the movable body 130 which rotates about the axis of the first bracket 120, and the rotation of which is restricted and guided by the second bracket 150.
Next, as shown in FIG. 7, the damping part 140 increases the sliding speed of the window/door 10 by an operation of the piston rod 142b contracted according to the opening of the window/door 10, and the fixing protrusion 110 and the hook member 144 may be separated from each other according to the rotation of the hook member 144 by the guide protrusion 144c.
Finally, as shown in FIG. 8, when the opening of the window/door 10 continues, the piston rod 142b of the damping part 140 maintains a fully contracted state and the hook member 144 rotates counterclockwise, whereby the hook member 144 can maintain a state in which the same is engageable with the fixing protrusion 110 any time.
The damper assembly 100 according to the present disclosure may prevent the impact noise and physical injury caused by acceleration when the window/door 10 is closed and maintain a stable engagement between the fixing protrusion 110 and the damping part 140 (the hook member 144) by the rotation of a movable body 130 even if the interval between the window/door 10 and the upper frame 20 or the lower frame is distorted or changed due to the elevating operation of the window/door 10 or various causes. Further, the damper assembly 100 enables easy and simple installation thereof in a small space due to the simple structure thereof, in spite of the damping part 140 being provided thereon.

Specific embodiments of the present disclosure have been described and illustrated above, but it will be apparent to those skilled in the art that various modifications and variation can be made without departing from the spirit and scope of the present disclosure. Accordingly, such modifications or variations should not be individually understood from the technical spirit or point of view of the present disclosure, and modified embodiments should be understood to belong to the claims of the present disclosure.

Brief Description of Reference Numerals

10:	Window/door	12:	Handle
20:	Upper frame	30:	Side frame
100:	Damper assembly for lift sliding window/door
110:	Fixing protrusion	M:	Permanent magnet
112:	Support frame	114:	Sliding block
116:	Adjustment screw	120:	First bracket
122:	Axial coupling	130:	Movable body
132:	Guide groove	134:	Movable pin
136:	Bushing	140:	Damping part
142:	Damper	142a:	Cylinder
142b:	Piston rod	142c:	Rotating part
144:	Hook member	144a:	Engaging groove
144b:	Engaging protrusion	144c:	Guide protrusion
150:	Second bracket	152:	long hole

Claims

A damper assembly for a lift sliding window/door configured to, when a handle is unlocked, ascend from a lower frame to be slidable for opening and closing, and when the handle is locked, descend to be refrained from sliding, the damper assembly comprising:
a fixing protrusion installed to an upper frame;

a first bracket installed on the upper surface of the window/door;

a movable body having one end axially-coupled to the first bracket such that the other end thereof rotates in the elevating direction of the window/door with reference to the first bracket;

a damping part provided on the movable body to engage with the fixing protrusion during a sliding operation of closing the window/door, so as to reduce the sliding speed; and

a second bracket installed on the upper surface of the window/door such that an engagement between the damping part and the fixing protrusion is maintained in response to the descent of the window/door, so as to perform regulation such that the other end of the movable body rotates in a predetermined range.
The damper assembly for a lift sliding window/door of claim 1, wherein the damping part comprises:
a damper configured to be extended or contracted while being mounted on the movable body, to reduce the sliding speed of the window/door; and

a hook member rotatably axially-coupled to an operational end of the damper to engage with the fixing protrusion before the open window/door is closed.
The damper assembly for a lift sliding window/door of claim 2, wherein the damper comprises:
a cylinder installed inside the movable body;

a piston rod configured to perform a decelerating operation when extended from the cylinder and perform an accelerating operation when contracted thereto; and

a rotating part axially-coupled to the hook member.
The damper assembly for a lift sliding window/door of claim 3, wherein the hook member comprises:
an engaging groove into which the fixing protrusion is introduced to be stably placed thereon;

an engaging protrusion formed on one end of the engaging groove such that the fixing protrusion is engaged therewith; and

a guide protrusion configured to move along a guide groove inside the movable body, when the piston rod is contracted, induce engagement or disengagement between the engaging protrusion and the fixing protrusion by rotating the hook member, and when the piston rod is extended, induce such that the engagement between the hook member and the fixing protrusion is maintained.
The damper assembly for a lift sliding window/door of claim 2, wherein the fixing protrusion
protrudes from the lower surface of a sliding block inserted and installed to be obliquely movable with respect to a support frame fixed to the upper frame and

is vertically adjusted by an adjustment screw penetrating the lower end of the support frame to be screw-coupled thereto and configured to elevate the sliding block according to the forward/reverse rotation thereof.
The damper assembly for a lift sliding window/door of claim 2, wherein the movable body comprises:
a movable pin coupled to the other end of the movable body to be fitted into a vertically long hole formed through the second bracket and configured to slide according to the guide of the long hole to regulate the rotation of the movable body; and

a bushing interposed between the movable pin and the long hole to facilitate the sliding of the movable pin.
The damper assembly for a lift sliding window/door of claim 4, wherein each of the fixing protrusion and the engaging groove comprises a permanent magnet generating a magnetic force to maintain smooth engagement and engaging force between the fixing protrusion and the engaging groove.