阅读说明：本技术 一种门窗无级爬升装置 (Stepless climbing device for door and window ) 是由 谢晓东 朱业明 于 2021-07-26 设计创作，主要内容包括：本发明公开了一种门窗无级爬升装置,包括定位座和爬升组件,定位座设有抵接部,抵接部具有第一抵接面和第二抵接面,第二抵接面位于抵接部的顶部；爬升组件包括爬升座和支撑片,支撑片的顶部与爬升座铰接、铰接处的铰轴称为第一铰轴,支撑片的底部设有缺角,支撑片具有第一边沿和第二边缘,第一边缘设于缺角的前侧,第二边缘设于缺角的顶部。使用时,可把定位座安装在窗框上,把爬升座安装在窗扇上；关闭窗扇时,可先使缺角处抵靠在抵接部上,然后继续关闭窗扇,支撑片会绕第一铰轴旋转并顶起窗扇,达到抬升窗扇的目的；通过调整定位座和爬升座的安装位置即可适用于尺寸不同、掉角严重程度不同的门窗,通用性较好。(The invention discloses a stepless climbing device for doors and windows, which comprises a positioning seat and a climbing assembly, wherein the positioning seat is provided with an abutting part, the abutting part is provided with a first abutting surface and a second abutting surface, and the second abutting surface is positioned at the top of the abutting part; the climbing assembly comprises a climbing seat and a supporting piece, the top of the supporting piece is hinged with the climbing seat, a hinge shaft at the hinged position is called a first hinge shaft, the bottom of the supporting piece is provided with a notch, the supporting piece is provided with a first edge and a second edge, the first edge is arranged on the front side of the notch, and the second edge is arranged on the top of the notch. When in use, the positioning seat can be arranged on the window frame, and the climbing seat is arranged on the window sash; when the window sash is closed, the unfilled corner is abutted against the abutting part, then the window sash is continuously closed, the supporting sheet rotates around the first hinge shaft and jacks up the window sash, and the purpose of lifting the window sash is achieved; the door and window that the size is different, fall angle severity is different can be applicable to through the mounted position of adjustment positioning seat and climbing seat, and the commonality is better.)

1. A stepless climbing device for doors and windows is characterized by comprising:

the positioning seat is provided with an abutting part, the abutting part is provided with a first abutting surface and a second abutting surface, the first abutting surface is positioned at the abutting part, the direction of the abutting part is taken as the front side, and the second abutting surface is positioned at the top of the abutting part;

the climbing assembly comprises a climbing seat and a supporting piece, the top of the supporting piece is hinged with the climbing seat, a hinge shaft at the hinged position is called a first hinge shaft, the first hinge shaft is transversely arranged, the bottom of the supporting piece is provided with a notch, the supporting piece is provided with a first edge and a second edge, the first edge is arranged on the front side of the notch, the second edge is arranged on the top of the notch, the first edge is matched with the first abutting surface, and the second edge is matched with the second abutting surface.

2. The door and window stepless climbing device according to claim 1, characterized in that: the positioning seat is provided with an installation part, the installation part is arranged at the bottom of the positioning seat, the abutting part is provided with two third abutting surfaces, and the two third abutting surfaces are respectively positioned at the left side and the right side of the abutting part.

3. The door and window stepless climbing device according to claim 2, characterized in that: the mounting part is a strip-shaped bulge, a first convex edge is arranged at the bottom of the strip-shaped bulge, a first internal thread through hole is arranged on the abutting part, and the first internal thread through hole is obliquely arranged; the strip-shaped bulge is transversely arranged at the bottom of the front side of the abutting part, the first convex edge protrudes forwards from the strip-shaped bulge, the first internal thread through hole faces the bottom of the rear side of the abutting part, or the strip-shaped bulge is transversely arranged at the bottom of the rear side of the abutting part, the first convex edge protrudes backwards from the strip-shaped bulge, and the first internal thread through hole faces the bottom of the front side of the abutting part.

4. The door and window stepless climbing device according to claim 2, characterized in that: and a first through hole which is vertically arranged is arranged on the positioning seat.

5. The door and window stepless climbing device according to claim 1, characterized in that: the climbing seat is provided with two second convex edges, the two second convex edges are vertically arranged, and the two second convex edges are respectively arranged on the front side and the rear side of the climbing seat; and a second internal thread through hole which is transversely arranged is arranged on the climbing seat.

6. The door and window stepless climbing device according to claim 1, characterized in that: and a second through hole which is transversely arranged is arranged on the climbing seat.

7. The door and window stepless climbing device according to claim 1, characterized in that: the climbing assembly further comprises an elastic member connected between the climbing seat and the support plate.

8. The door and window stepless climbing device according to claim 7, characterized in that: the elastic component is a torsion spring which is sleeved on the outer side of the first hinge shaft, and two ends of the torsion spring are respectively connected with the climbing seat and the supporting sheet.

9. The door and window stepless climbing device according to claim 1 or 7, characterized in that: the climbing seat is provided with a second limiting block, the supporting sheet is provided with a limiting part, the track of the limiting part rotating around the first hinge shaft is called a first track, and the second limiting block is arranged on the first track; the supporting sheet rotates around the first hinge shaft to have a second state, and in the second state, the unfilled corner is located below the rear portion of the first hinge shaft, and the limiting portion is close to the second limiting block.

10. The door and window stepless climbing device according to claim 9, characterized in that: the climbing seat is also provided with a first limiting block, the first limiting block and the second limiting block are arranged on the first track at intervals, and the limiting part is arranged between the first limiting block and the second limiting block; the support sheet rotates around the first hinge shaft and further has a first state, and in the first state, the unfilled corner is located below the first hinge shaft, and the limiting portion is close to the first limiting block.

Technical Field

The invention relates to the technical field of door and window parts, in particular to a stepless climbing device for doors and windows.

Background

In modern buildings, aluminum alloy doors and windows are widely applied to engineering projects. The aluminum alloy door and window can have the condition of falling angle in the long-time use process, and the falling angle can influence the whole sealing and water-resisting performance and even can influence the normal opening and closing of the door and window.

At present, a climbing block is generally used for dealing with the corner falling of a door window, the climbing block is a wedge-shaped component, the climbing block is installed on the inner side of a window frame and at the bottom of a window sash, and the window sash can be lifted along the inclined plane of the climbing block when the window sash is closed, so that the window sash can be normally opened and closed. However, because the height drop of each climbing block is fixed, different climbing blocks need to be selected for doors and windows with different sizes and different falling angle severity degrees, the universality of the climbing block is poor, the friction between the climbing block and the window sash is large when the window sash is closed, the emitted noise is large, the window sash is closed by large force, and the climbing block is easy to wear.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a stepless climbing device for doors and windows.

The stepless climbing device for the door and window comprises a positioning seat and a climbing assembly, wherein the positioning seat is provided with an abutting part, the abutting part is provided with a first abutting surface and a second abutting surface, the first abutting surface is positioned at the front side of the abutting part, and the second abutting surface is positioned at the top of the abutting part; the climbing assembly comprises a climbing seat and a supporting piece, the top of the supporting piece is hinged with the climbing seat, a hinge shaft at the hinged position is called a first hinge shaft, the first hinge shaft is transversely arranged, the bottom of the supporting piece is provided with a notch, the supporting piece is provided with a first edge and a second edge, the first edge is arranged on the front side of the notch, the second edge is arranged on the top of the notch, the first edge is matched with the first abutting surface, and the second edge is matched with the second abutting surface.

The stepless climbing device for the door and the window provided by the embodiment of the invention at least has the following technical effects: when in use, the positioning seat can be arranged on the window frame, and the climbing seat is arranged on the window sash; when the window sash is closed, the supporting sheet can be rotated to enable the unfilled corner to abut against the abutting part, then the window sash is continuously closed, and the supporting sheet can rotate around the first hinge shaft and jack up the window sash, so that the purpose of lifting the window sash is achieved; the door and window positioning device can be suitable for doors and windows with different sizes and different corner drop severity degrees by adjusting the mounting positions of the positioning seat and the climbing seat, and has better universality; and the friction force between the abutting part and the supporting sheet is small in the process of closing the window sash, so that abnormal sound is reduced, and more labor is saved.

In some embodiments of the present invention, the positioning seat is provided with a mounting portion, the mounting portion is provided at the bottom of the positioning seat, and the abutting portion has two third abutting surfaces, and the two third abutting surfaces are respectively located at the left side and the right side of the abutting portion. The installation department can be used for being connected between positioning seat and the window frame, and the positioning seat has both been installed on the floorbar of window frame like this, also can install on the left side roof beam or the right side roof beam of window frame, and the positioning seat can be installed in suitable position according to user's needs, and the commonality is better.

In some embodiments of the present invention, the mounting portion is a strip-shaped protrusion, a first protruding edge is disposed at the bottom of the strip-shaped protrusion, a first internal thread through hole is disposed on the abutting portion, and the first internal thread through hole is disposed in an inclined manner; the strip-shaped bulge is transversely arranged at the bottom of the front side of the abutting part, the first convex edge protrudes forwards from the strip-shaped bulge, and the first internal thread through hole faces to the bottom of the rear side of the abutting part; or, the strip-shaped bulge is transversely arranged at the bottom of the rear side of the abutting part, the first convex edge protrudes backwards from the strip-shaped bulge, and the first internal thread through hole faces to the bottom of the front side of the abutting part. When the positioning seat is installed on the window frame, the first convex edge can be embedded into one side of the groove of the window frame firstly, then the fastening screw is used for penetrating through the first internal thread through hole and then abutting against the other side of the groove of the window frame, and therefore the installation of the positioning seat is completed, the structure is simple, and the installation and the operation are simple and convenient.

In some embodiments of the present invention, the positioning seat is provided with a first through hole vertically disposed. Through setting up first through-hole, during the installation positioning seat, can use in the screw in window frame behind the self-tapping screw passed first through-hole, accomplish the installation of positioning seat, simple structure, installation easy and simple to handle.

In some embodiments of the invention, the climbing seat is provided with two second convex edges, the two second convex edges are vertically arranged, and the two second convex edges are respectively arranged on the front side and the rear side of the climbing seat; and a second internal thread through hole which is transversely arranged is arranged on the climbing seat. When installing the seat that climbs on the casement like this, can follow the vertical recess that inserts on the casement frame of climbing, make two protruding edges of second all inlay the inboard at the recess, then use holding screw to pass and support behind the second internal thread through-hole and lean on in the recess, accomplish the installation that climbs the seat promptly, simple structure, installation easy and simple to handle.

In some embodiments of the invention, the climbing seat is provided with a second through hole arranged transversely. Through setting up the second through-hole, when the seat that climbs is installed, can use self-tapping screw to pass in the frame of screw in casement behind the second through-hole, accomplish the installation that climbs the seat, simple structure, installation easy and simple to handle.

In some embodiments of the invention, the climbing assembly further comprises a resilient member connected between the climbing seat and the support plate. When the window sash is opened, the supporting sheet originally can hang down under the action of gravity, and through the arrangement of the elastic member, the elastic member can enable the supporting sheet to overcome the gravity and maintain the state of inclining backwards from top to bottom, and the notch can be accurately abutted against the abutting part when the window sash is closed.

In some embodiments of the present invention, the elastic member is a torsion spring, the torsion spring is sleeved outside the first hinge shaft, and two ends of the torsion spring are respectively connected to the climbing seat and the support plate. The torsional spring can overlap in the outside of first hinge, need not to set up extra fixed knot structure and fixes, and simple structure is compact, and the assembly is simple and convenient.

In some embodiments of the invention, a second limiting block is arranged on the climbing seat, the supporting sheet is provided with a limiting part, a track of the limiting part rotating around the first hinge shaft is called a first track, and the second limiting block is arranged on the first track; the supporting sheet rotates around the first hinge shaft to have a second state, and in the second state, the unfilled corner is located below the rear portion of the first hinge shaft, and the limiting portion is close to the second limiting block. Through setting up second stopper and spacing portion, unfilled corner department removes to the top of butt portion, leads to can not the lifting casement when preventing to close the casement.

In some embodiments of the present invention, a first limiting block is further disposed on the climbing seat, the first limiting block and the second limiting block are disposed on the first track at intervals, and the limiting portion is disposed between the first limiting block and the second limiting block; the support sheet rotates around the first hinge shaft and further has a first state, and in the first state, the unfilled corner is located below the first hinge shaft, and the limiting portion is close to the first limiting block. The first limiting piece can prevent the supporting piece from rotating to pass the position, and the window sash is prevented from falling back from the lifted position.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a positioning seat of a door/window stepless climbing device according to an embodiment of the present invention;

FIG. 2 is an exploded view of a climbing assembly of a door and window stepless climbing device according to an embodiment of the invention;

FIG. 3 is a schematic view of one manner of mounting the positioning socket of FIG. 1;

FIG. 4 is a schematic view of another mounting of the positioning socket of FIG. 1;

fig. 5 is a schematic view of the support sheet of fig. 2 in a second state;

fig. 6 is a schematic structural view of the support sheet in fig. 2 in a first state.

In the drawings:

111-a first abutment surface; 112-a second abutment surface; 113-a third abutment surface; 120-a mounting portion; 121-a first convex edge; 130-a first internally threaded through hole; 140-a first via; 210-a climbing seat; 211-a second ledge; 212-a second internally threaded through hole; 213-a second via; 214-a second stopper; 215-a first stopper; 220-a first hinge shaft; 230-a support sheet; 231-unfilled corner; 232-a limiting part; 240-a resilient member; 300-a window frame; 400-window sash.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "a" or "an" mean one or more, the terms "a" or "an" mean two or more, the terms larger than, smaller than, exceeding, and the like are understood to include the number, and the terms "larger than, smaller than, within, and the like are understood to include the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A door and window stepless climbing device according to an embodiment of the invention is described below with reference to fig. 1 to 6.

The stepless climbing device for the door and window comprises a positioning seat and a climbing assembly, wherein the positioning seat is provided with an abutting part, the abutting part is provided with a first abutting surface 111 and a second abutting surface 112, the first abutting surface 111 is positioned at the front side of the abutting part, and the second abutting surface 112 is positioned at the top of the abutting part; the climbing assembly comprises a climbing seat 210 and a supporting plate 230, the top of the supporting plate 230 is hinged with the climbing seat 210, a hinge shaft at the hinged position is called a first hinge shaft 220, the first hinge shaft 220 is transversely arranged, the bottom of the supporting plate 230 is provided with a notch 231, the supporting plate 230 is provided with a first edge and a second edge, the first edge is arranged on the front side of the notch 231, the second edge is arranged on the top of the notch 231, the first edge is matched with the first abutting surface 111, and the second edge is matched with the second abutting surface 112.

For example, as shown in fig. 5 and 6, when in use, the positioning seat can be installed on the window frame 300, the front side of the positioning seat is the outdoor direction, the first abutting surface 111 faces the outdoor direction, the positioning seat can be installed on the bottom beam of the window frame 300 or the side beam of the window frame 300 by bolting, clamping, pin-jointing or other suitable methods, the upper abutting part of the positioning seat is provided with the first abutting surface 111 facing the front side and the second abutting surface 112 facing the upper side, and the first abutting surface 111 and the second abutting surface 112 can be perpendicular to each other; the climbing seat 210 can be installed on the side beam of the window sash 400 by bolting, clamping, bolt connection or other suitable methods, the unfilled corner 231 is arranged at the rear side of the bottom of the support sheet 230, the first edge extends vertically, and the second edge extends back and forth; when the window sash 400 is closed, the first edge is close to the first abutting surface 111, and the second edge is close to the second abutting surface 112; the first hinge shaft 220 may be a rivet.

When in use, the positioning seat can be installed on the window frame 300, and the climbing seat 210 is installed on the window sash 400, so that the vertical distance between the abutting part and the first hinge shaft 220 in the state that the window sash 400 is opened is smaller than the distance between the unfilled corner 231 and the first hinge shaft 220; when the window sash 400 is closed, the supporting piece 230 may be rotated to make the unfilled corner 231 abut against the abutting portion, then the window sash 400 is continuously closed, and the supporting piece 230 may rotate around the first hinge shaft 220 and jack up the window sash 400, so as to lift the window sash 400; the installation positions of the positioning seat and the climbing seat 210 are adjusted, so that the device can be suitable for doors and windows with different sizes and different corner drop severity degrees, and has better universality; the supporting sheet 230 and the abutting portion are always in a line contact state in the process of closing the window sash 400, the friction force between the abutting portion and the supporting sheet 230 is small due to the line contact state, abnormal sound is reduced, climbing is a more gradual process, and the window sash 400 is more labor-saving to close.

In some embodiments of the present invention, the positioning seat is provided with a mounting portion 120, the mounting portion 120 is provided at the bottom of the positioning seat, the abutting portion has two third abutting surfaces 113, and the two third abutting surfaces 113 are respectively located at the left side and the right side of the abutting portion. The mounting portion 120 is used for connecting the positioning seat with the window frame 300, and the third abutting surface 113 can be perpendicular to the first abutting surface 111, so that the positioning seat has two mounting modes, the positioning seat can be mounted on the bottom beam of the window frame 300, and also can be mounted on the left side beam or the right side beam of the window frame 300, referring to fig. 3, when the positioning seat is mounted on the bottom beam, the first abutting surface 111 faces forward, the second abutting surface 112 faces upward, at this time, the second abutting surface 112 abuts against the second edge when the window sash 400 is closed, referring to fig. 4, when the positioning seat is mounted on the side beam of the window frame 300, the first abutting surface 111 faces forward, the third abutting surface 113 faces upward, at this time, the third abutting surface 113 abuts against the second edge when the window sash 400 is closed; the positioning seat can be installed in a proper position according to the needs of a user, and the universality is better.

In some embodiments of the present invention, the mounting portion 120 is a strip-shaped protrusion, a first protruding edge 121 is disposed at the bottom of the strip-shaped protrusion, a first internal threaded through hole 130 is disposed on the abutting portion, and the first internal threaded through hole 130 is disposed in an inclined manner; the strip-shaped bulge is transversely arranged at the bottom of the front side of the abutting part, the first convex edge 121 protrudes forwards from the strip-shaped bulge, and the first internal thread through hole 130 faces to the bottom of the rear side of the abutting part; or, the strip-shaped protrusion is transversely disposed at the bottom of the rear side of the abutting portion, the first protruding edge 121 protrudes backwards from the strip-shaped protrusion, and the first internal threaded through hole 130 faces the bottom of the front side of the abutting portion. Referring to fig. 5, the frames of the door and window frames 300 and the door and window sashes 400 of the aluminum alloy doors and windows are provided with grooves with C-shaped sections; the first convex edge 121 extends transversely, and by arranging the first convex edge 121 and the first internal thread through hole 130, when the positioning seat is installed on the window frame 300, the first convex edge 121 can be embedded on one side of the groove, and then a set screw penetrates through the first internal thread through hole 130 and abuts against the other side of the groove, so that the installation of the positioning seat is completed, the structure is simple, and the installation operation is simple and convenient; the mounting portion 120, the bar-shaped protrusion, and the first protruding edge 121 may be an integral component.

In some embodiments of the present invention, the positioning seat is provided with a first through hole 140 vertically disposed. Referring to fig. 1, the number of the first through holes 140 may be two, the first internally threaded through hole 130 is disposed between the two first through holes 140, and the first through holes 140 may be counter sunk holes; by arranging the first through hole 140, when the positioning seat is installed, a tapping screw can be screwed into the window frame 300 after penetrating through the first through hole 140, so that the installation of the positioning seat is completed, the structure is simple, and the installation operation is simple and convenient; the positioning seat can be pre-fixed by using a set screw and then fixed by using a self-tapping screw, so that the phenomenon of dislocation caused by direct use of the self-tapping screw is avoided, and the installation is more convenient.

In some embodiments of the present invention, the climbing seat 210 is provided with two second convex edges 211, both the two second convex edges 211 are vertically disposed, and the two second convex edges 211 are respectively disposed on the front side and the rear side of the climbing seat 210; the climbing seat 210 is provided with a second internal thread through hole 212 arranged transversely. The second convex edge 211 arranged on the front side protrudes forwards, and the second convex edge 211 arranged on the rear side protrudes backwards, so that when the climbing seat 210 is installed on the window sash 400, the climbing seat 210 can be vertically inserted into the groove on the frame of the window sash 400, the two second convex edges 211 are embedded in the inner side of the groove, and then a set screw passes through the second internal thread through hole 212 and abuts against the groove, so that the installation of the climbing seat 210 is completed, the structure is simple, and the installation operation is simple and convenient; the number of the second internally threaded through holes 212 may be two, and the two second internally threaded through holes 212 are respectively disposed at the front upper portion and the rear upper portion of the first hinge shaft 220.

In some embodiments of the present invention, the climbing seat 210 is provided with a second through hole 213 arranged transversely. The number of the second through holes 213 may be two, the second internal threaded through hole 212 and the first hinge shaft 220 are both disposed between the two second through holes 213, and the second through holes 213 may be counter sunk holes; by arranging the second through hole 213, when the climbing seat 210 is installed, a tapping screw can be screwed into the frame of the window sash 400 after penetrating through the second through hole 213, so that the installation of the climbing seat 210 is completed, the structure is simple, and the installation operation is simple and convenient; the climbing seat 210 can be pre-fixed by using a set screw and then fixed by using a self-tapping screw, so that the phenomenon of dislocation caused by direct use of the self-tapping screw is avoided, and the climbing seat is more convenient to install.

In some embodiments of the present invention, the climbing assembly further comprises a resilient member 240, the resilient member 240 being connected between the climbing shoe 210 and the support plate 230. When the window sash 400 is opened, the supporting sheet 230 will hang down under the action of gravity, and by providing the elastic member 240, the elastic member 240 can enable the supporting sheet 230 to overcome the gravity and maintain the state of inclining backwards from top to bottom, so that the unfilled corner 231 can accurately abut against the abutting part when the window sash 400 is closed; the elastic member 240 may be a spring, a leaf spring, or other suitable member.

In some embodiments of the present invention, the elastic member 240 is a torsion spring, which is sleeved outside the first hinge shaft 220, and two ends of the torsion spring are respectively connected to the climbing seat 210 and the supporting plate 230. Referring to fig. 2, when assembling the climbing assembly, the torsion spring may be placed on the climbing seat 210, and then placed in the supporting plate 230, so that the torsion spring is sandwiched between the supporting plate 230 and the climbing seat 210, and then the supporting plate 230 and the climbing seat 210 are riveted into a whole by rivets; the torsion spring can be sleeved on the outer side of the first hinge shaft 220, an additional fixing structure is not required to be arranged for fixing, the structure is simple and compact, and the assembly is simple and convenient.

In some embodiments of the present invention, the climbing seat 210 is provided with the second stopper 214, the supporting plate 230 is provided with the stopper 232, a track of the stopper 232 rotating around the first hinge shaft 220 is referred to as a first track, and the second stopper 214 is disposed on the first track; the supporting piece 230 rotates around the first hinge shaft 220 to have a second state, in which the unfilled corner 231 is located at the rear lower part of the first hinge shaft 220 and the limiting part 232 is close to the second limiting block 214. The limiting part 232 may be disposed on the upper side of the first hinge shaft 220, the second limiting block 214 is disposed on the front upper side of the hinge shaft, referring to fig. 5, when the window sash 400 is opened, the unfilled corner 231 of the supporting piece 230 has a tendency of rising to the rear upper side under the action of the elastic member 240, so that the supporting piece 230 is tilted backward from top to bottom, and when the supporting piece 230 is in the second state, the limiting part 232 abuts against the second limiting block 214 to prevent the unfilled corner 231 from continuing to rise, so that the unfilled corner 231 is aligned with the abutting part; by providing the second stopper 214 and the stopper 232, the unfilled corner 231 is prevented from moving above the abutting portion when the window sash 400 is closed, so that the window sash 400 cannot be lifted.

In some embodiments of the present invention, the climbing seat 210 is further provided with a first stopper 215, the first stopper 215 and the second stopper 214 are disposed on the first track at intervals, and the stopper 232 is disposed between the first stopper 215 and the second stopper 214; the supporting piece 230 rotates around the first hinge shaft 220 and has a first state in which the unfilled corner 231 is located below the first hinge shaft 220 and the limiting portion 232 is adjacent to the first limiting block 215. The climbing seat 210, the two second protruding edges 211, the first stopper 215, and the second stopper 214 may be an integral member, and the stopper 232 and the support plate 230 may be an integral member; referring to fig. 6, when the window sash 400 is closed, the supporting piece 230 is erected, and the supporting piece 230 is in the first state, the first limiting piece can prevent the supporting piece 230 from rotating over, and the window sash 400 from falling back from the lifted position.

While the preferred embodiments of the present invention have been described in detail, it should be understood that the invention is not limited to those precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined in the appended claims.