CN210343021U - Window sash opening and closing device and fire window - Google Patents

Abstract

The utility model provides a window sash opening and closing device and a fireproof window; this headstock gear installs on casement and window frame, it includes the fixing base, control mechanism and the gangbar of connecting fixing base and control mechanism, control mechanism has first moving part, the setting element, swing piece and temperature-sensing piece, the setting element is suitable for fixing a position control mechanism's mounted position, swing piece can be swung between first state and second state and establish on first moving part, at the first state, a draw-in groove is injectd jointly to swing piece and first moving part, temperature-sensing piece joint is in the draw-in groove, in order to fix a position swing piece and restrict the removal of first moving part, at the second state, temperature-sensing piece takes place deformation, swing piece swing breaks away from, so that first moving part takes place to remove. The opening and closing device can prevent the window sash from losing ventilation and lighting performance due to automatic closing under the condition of large wind power; when the temperature sensing piece is intact, the opening angle of the window sash can be adjusted. After the temperature sensing piece is deformed (in a fire state), the window sash can be closed in time to isolate the fire.

Description

Window sash opening and closing device and fire window

Technical Field

The utility model relates to a door and window field, in particular to headstock gear and fire window of casement.

Background

When wind power is large, the connecting rod of the window sash opening and closing device on the fire window in the related art can drive the window sash to be closed, so that the fire window loses ventilation and lighting performance.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent. Therefore, the first objective of the present invention is to provide an opening and closing device for a window sash. The opening and closing device of the window sash can prevent the window sash from losing ventilation and lighting performance due to automatic closing under the condition of large wind power, and can close the window sash in time under the fire condition to isolate the fire.

A second object of the present invention is to provide a fire window.

In order to achieve the above object, the utility model provides a first aspect, the utility model provides an opening and closing device of casement installs on casement and window frame, the opening and closing device of casement includes:

a fixed seat;

the temperature sensing piece is clamped in the clamping groove to position the swinging piece to limit the movement of the first moving piece, and in the second state, the temperature sensing piece deforms and swings and breaks away from the swinging piece to enable the first moving piece to move;

one end of the linkage rod is connected with the fixed seat, and the other end of the linkage rod is connected with the first movable part so as to drive the linkage rod to rotate to close the window sash through the movement of the first movable part.

According to the window sash opening and closing device provided by the embodiment of the utility model, through the arrangement of the control mechanism, when the temperature sensing piece is intact, the positioning piece is stopped, the first moving piece is also stopped, and the stopping force is larger than the wind force, so that the window sash can be prevented from being automatically closed under the condition of larger wind force; meanwhile, when the opening and closing force is manually applied and is greater than the parking force of the positioning piece, the window sash can be opened or closed at will, compared with the existing opening and closing device of the window sash, the device can bear larger wind power, the ventilation and lighting performance of the fireproof window can be ensured, and the window sash can be closed in time under the fire state to isolate the fire.

In addition, according to the utility model discloses the headstock gear of casement that above-mentioned embodiment provided can also have following additional technical characterstic:

according to an embodiment of the present invention, the fixing base is adapted to be mounted on a window sash or a window frame; when the fixed seat is arranged on the window sash, the control mechanism is arranged on the window frame; when the fixed seat is arranged on the window frame, the control mechanism is arranged on the window sash.

According to the embodiment of the utility model, the positioning piece is provided with a first alignment hole, and the first movable piece is provided with a second alignment hole; in the first state, the first aligning hole is aligned above the second aligning hole, and the swinging member is inserted into the first aligning hole and the second aligning hole to be positioned on the positioning member to limit the movement of the first moving member.

According to an embodiment of the present invention, in the first state, the swinging member abuts on the bottom surface of the window frame or the window sash, and is positioned on the window frame or the window sash by a frictional force generated between the bottom surface of the window frame or the window sash.

According to the utility model discloses, the piece that swings includes the torsional spring and swings the piece, swing the piece setting and be in on the both ends connection of torsional spring, the torsional spring articulates on the first moving part.

According to the utility model discloses the embodiment, the setting element includes locating piece and fastener, be equipped with the opening on the locating piece, the fastener is followed open-ended top, bottom or front end insert in the opening, with the locating piece location is in the window frame or on the casement.

According to the utility model discloses, still include the connection piece, the connection piece has stiff end and grafting end, stiff end detachably fixes on the locating piece, the grafting end is pegged graft first moving part below, just it serves to peg graft and is equipped with first locating hole.

According to the utility model discloses, the draw-in groove has the setting and is in adjusting screw and setting on the first moving part are in second through-hole on the swing piece, adjusting screw will temperature-sensing spare locking is in the second through-hole, with will temperature-sensing spare joint is in the draw-in groove.

According to the embodiment of the utility model, the device also comprises a second moving part, the second moving part is connected with the fixed seat to form a moving pair, and a rack is arranged on the side wall of the second moving part; and a gear meshed with the rack is arranged at the end part of the linkage rod.

According to the embodiment of the present invention, the device further comprises an elastic element, one end of the elastic element is connected to the second movable member, and the other end of the elastic element is arranged on the fixed seat; when the second movable piece moves relative to the fixed seat, the elastic element is compressed or stretched.

According to the embodiment of the utility model, the window frame is provided with the sliding groove, the bottom surface of the sliding groove is upwards protruded to form a convex part, and the inner wall of part of the sliding groove is inwards recessed to form a necking part; when the fixed seat is installed on the window sash, the positioning piece is positioned on the sliding groove containing the necking part.

In a second aspect of the present invention, the present invention provides a fire window, which includes the above-mentioned opening/closing device for a window sash. The opening and closing device of the window sash in the fireproof window is arranged through the control mechanism, when the temperature sensing piece is intact, the positioning piece is parked, the first moving piece is also parked, the parking force of the first moving piece is larger than the wind power, and the window sash can be prevented from being automatically closed under the condition of larger wind power; meanwhile, when the opening and closing force is manually applied and is greater than the parking force of the positioning piece, the window sash can be opened or closed at will, compared with the existing opening and closing device of the window sash, the device can bear larger wind power, the ventilation and lighting performance of the fireproof window can be ensured, and the window sash can be closed in time under the fire state to isolate the fire.

Drawings

Fig. 1 is a schematic view of an opening and closing device for a window sash according to an embodiment of the present invention;

fig. 2 is a schematic view of a first control mechanism according to an embodiment of the present invention;

fig. 3 is another state diagram of the first control mechanism according to an embodiment of the present invention;

fig. 4 is another schematic view of a first control mechanism according to an embodiment of the present invention;

fig. 5 is a schematic view of a second control mechanism according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a third control mechanism according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a fourth control mechanism according to an embodiment of the present invention;

fig. 8 is another schematic view of a fourth control mechanism according to an embodiment of the present invention;

fig. 9 is a schematic view of a first type of chute according to an embodiment of the invention;

fig. 10 is a schematic view of another perspective of the first chute according to an embodiment of the invention;

fig. 11 is a schematic view of a second type of runner according to an embodiment of the present invention;

description of reference numerals: the window sash opening and closing device comprises a window sash opening and closing device 1, a fixed seat 11, a boss 111, a flange 112, a second movable piece 113, a rack 1131, an elastic element 114, a control mechanism 12, a first movable piece 121, a second alignment hole 1211, an adjusting screw 1212, a positioning piece 122, a positioning piece 1222, a fastening piece 1223, an opening 1224, a connecting piece 1225, a first alignment hole 1221, a swinging piece 123, a torsion spring 1231, a swinging piece 1232, a second through hole 12321, a temperature sensing piece 124, a clamping groove 125, a linkage rod 13, a gear 131, a sliding groove 2, a protruding part 21, a necking part 22 and a protrusion 221.

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 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 drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the accompanying drawings 1-10 of the specification and a specific embodiment.

Referring to fig. 1, there is shown an opening and closing device 1 for a window sash according to an embodiment of the present invention, in which the opening and closing device 1 is mainly improved in view of the fact that when the wind force of the existing opening and closing device for a window sash is large, the window is automatically closed, and the performance of ventilation and lighting of the fire window is lost; the opening and closing device 1 of the window sash comprises a fixed seat 11, a control mechanism 12 and a linkage rod 13. Wherein, the fixed seat 11 can be installed on the window sash or the window frame; when the fixed seat 11 is installed on the window sash, the control mechanism 12 is installed on the window frame, and when the fixed seat 11 is installed on the window frame, the control mechanism 12 is installed on the window sash; one end of the linkage rod 13 is connected with the fixed seat 11, and the other end is connected with the control mechanism 12. The following description will be made by taking the example that the fixing seat 11 is installed on the window sash and the control mechanism is installed on the window frame.

In particular, referring to fig. 2 in combination, the fixing base 11 is adapted to be mounted on a window sash; the control mechanism 12 is suitable for being installed on a window frame, the control mechanism 12 is provided with a first movable member 121, a positioning member 122, a swinging member 123 and a temperature sensing member 124, the positioning member 122 is suitable for positioning the installation position of the control mechanism 12 on the window frame, the swinging member 123 is swingably arranged on the first movable member 121 between a first state and a second state, in the first state, a clamping groove 125 is defined between the swinging member 123 and the first movable member 121, the temperature sensing member 124 is clamped in the clamping groove 125 to position the swinging member 123 on the window frame to limit the movement of the first movable member 121, in the second state, the temperature sensing member 124 is deformed, and the swinging member 123 is separated from the positioning member 122 to enable the first movable member 121 to move; one end of the linkage rod 13 is connected with the fixed seat 11, and the other end of the linkage rod is connected with the first movable part 121, so that the linkage rod 13 is driven to rotate to close the window sash through the movement of the first movable part 121.

That is, the control mechanism 12 is stopped on the window frame by the friction force between the positioning member 122 and the window frame, and the first movable member 121 can move on the window frame and switch between the first state and the second state by the cooperation of the swinging member 123 and the temperature sensing element 124. Therefore, when the temperature sensing part 124 is intact, the parking force of the positioning part 122 on the window frame is larger than the wind force, which can prevent the window sash from being blown under the condition of larger wind force, and the parking state of the positioning part 122 is maintained, and when the opening and closing force is artificially exerted and is larger than the parking force of the positioning part 122, the window sash can be opened or closed arbitrarily. When the temperature sensing member 124 is deformed, for example, broken, the swinging member 123 is separated from the positioning member 122, so that the first movable member 121 moves to close the window sash, thereby ensuring the fireproof performance of the fireproof window.

It can be understood that when the device 1 is used, for example, when the window sash needs to be opened, the whole control mechanism 12 can be moved on the window frame by applying a parking force greater than the positioning member 122, and then the linked rod 13 is driven to rotate to open the window sash by the movement of the control mechanism 12, wherein the opening angle of the window sash is determined by the force applied; when the temperature of the temperature sensing element 124 is higher than the preset temperature, that is, when a fire breaks out, the temperature sensing element 124 deforms, the swinging element 123 loses the supporting force and swings away from the positioning element, at this time, the swinging element 123 is in the second state, and the first movable element 121 moves to drive the linkage rod 13 to rotate to close the window sash.

In some examples, the window frame may be provided with a sliding groove 2, and the control mechanism 12 is integrally disposed in the sliding groove 2, wherein the positioning member 122 is immovably positioned in the sliding groove 2 relative to the first movable member 121, and the first movable member 121 is movably disposed in the sliding groove 2; in this manner, movement of the first movable member 121 on the window frame is achieved.

In some examples, the positioning member 122 may have a first alignment hole 1221, and the first movable member 121 may have a second alignment hole 1211; in the first state, the first alignment hole 1221 is aligned above the second alignment hole 1211, and the swinging member 123 is inserted into the first alignment hole 1221 and the second alignment hole 1211 to be positioned on the positioning member 122 to limit the movement of the first movable member 121. That is, the positioning element 122 is parked on the window frame, the swinging element 123 is swingably disposed on the first movable element 121, and the swinging element 123 is inserted into the first alignment hole 1221 and the second alignment hole 1211, so that the swinging element 123 is positioned on the positioning element 122, thereby limiting the movement of the first movable element 121 on the window frame, at this time, the swinging element 123 is in the first state, please refer to fig. 2 in combination, the swinging element 123 is inserted into the first alignment hole 1221 and the second alignment hole 1211, the swinging element 123 and the first movable element 121 can define the card slot 125 together, and then the temperature sensing element 124 is disposed in the card slot 125, so that the swinging element 123 can be positioned on the window frame by the supporting force of the temperature sensing element 124 on the swinging element 123. Thus, when a fire occurs, please refer to fig. 3 and 4 in combination, when the temperature is higher than the preset temperature of the temperature sensing element 124, the temperature sensing element 124 deforms, the swinging element 123 loses the supporting force, and under the swinging force of the swinging element 123 itself, the swinging element breaks away from the first alignment hole 1221 and the second alignment hole 1211 to move the first movable element 121 on the window frame, and the first movable element 121 drives the linkage rod 13 to rotate to close the window sash in the moving process.

Of course, in some examples, please refer to fig. 5 in combination, the end structure design of the swinging member 123 positioned on the window frame and the hole-shaped design of the second alignment hole 1211 can be used to enable the swinging member 123 to abut against the bottom surface of the window frame, i.e. directly abut against the sliding chute 2, through the movement of the first moving member 121, a friction force is generated between the swinging member 123 and the sliding chute 2, and then the temperature sensing member 124 is clamped in the clamping groove 125, so that the swinging member 123 is positioned on the window frame.

Further, to realize the swing switching of the swing member 123 between the first state and the second state, please refer to fig. 2 in combination, the swing member 123 may include a torsion spring 1231 and a swing block 1232, the swing block 1232 is disposed at two connecting ends of the torsion spring 1231, and the torsion spring 1231 is hinged on the first movable member 121. Thus, when the temperature sensing element 124 deforms, and the swinging element 123 loses the supporting force, the elastic force of the torsion spring 1231 is released, the swinging block 1232 swings away from the window frame under the traction of the elastic force of the torsion spring 1231, and the first moving element 121 slides on the sliding groove 2 under the traction of the elastic force, so that the linkage rod 13 performs the window closing action. In the present embodiment, the specific shape of the swing block 1232 is not limited, and may be a rod-like structure as shown in fig. 1, or a block-like structure as shown in fig. 5.

In some examples, the card slot 125 has an adjusting screw 1212 disposed on the first movable member 121 and a second through hole 12321 disposed on the swing block 1232, and the adjusting screw 1212 locks the temperature sensing member 124 in the second through hole 12321 to clamp the temperature sensing member 124 in the card slot 125. It can be understood that one end of the temperature sensing element 124 can pass through the second through hole 12321 and be locked to the other end of the temperature sensing element 124 by the adjusting screw 1212, so that the temperature sensing element 124 is locked in the card slot 125. The temperature sensing element 124 is engaged with a slot 125 defined by the first movable element 121 and the swinging element 123. When the temperature is higher than the preset temperature, the temperature sensing element 124 deforms to release the supporting force for the swinging element 123, and the temperature sensing element 124 may be a temperature sensing glass ball or a fusible metal element. When a fire disaster happens, the temperature sensing glass ball or the fusible metal part can sense the temperature, when the temperature is higher than the preset temperature, the glass ball or the fusible metal part can explode or melt, so that the swinging part 123 loses the supporting force, the elastic force of the torsion spring 1231 is released, the first movable part 121 is pulled to move, and the linkage rod 13 rotates to close the window.

In some examples, referring to fig. 2-4 in combination, the positioning member 122 includes a positioning block 1222 and a fastening member 1223, the positioning block 1222 is provided with an opening 1224, the fastening member 1223 may be a wind-supporting limiting screw, and the fastening member 1223 is inserted into the opening 1224 from the top end of the opening 1224 to position the positioning block 122 on the sliding groove 2 of the window frame. It can be understood that the wind bracing force limiting screw is inserted into the opening 1224 from the top end of the opening 1224, and due to the downward acting force of the wind bracing force limiting screw, the positioning block 1222 is expanded at both sides of the opening to contact with the inner wall surface of the sliding chute 2, so as to increase the friction force, and the positioning element 122 is positioned on the window frame. Of course, referring to fig. 6, the wind bracing force limiting screw may also be inserted into the opening 1224 from the bottom end of the opening 1224 to interact with the limiting nut, so that the positioning block 1222 is expanded at two sides of the opening to contact with the inner wall surface of the sliding chute 2, increasing the friction force, and positioning the positioning element 122 on the window frame. Referring to fig. 7, the wind bracing force limiting screw may also be inserted into the opening 1224 from the front end of the opening 1224, so that the positioning block 1222 is expanded at two sides of the opening by the force of the wind bracing force limiting screw towards the opening 1224, and contacts with the inner wall surface of the sliding groove 2 to increase the friction force, so that the positioning element 122 is positioned on the window frame.

In some examples, referring to fig. 8-10 in combination, in order to ensure that the positioning member 122 can stably stay in the sliding groove 2 when the window sash is opened at any angle, the bottom surface of the sliding groove 2 protrudes upward to form the protrusion 21, part of the inner wall of the sliding groove 2 is recessed inward to form the throat 22, and the positioning member 122 is positioned on the sliding groove 2 including the throat 22. Therefore, through the arrangement of the protruding portion 21 and the necking portion 22, the friction force between the positioning member 122 and the sliding chute 2 can be increased, so that the positioning member 122 can be stably parked and positioned in the sliding chute 2 at any angle when the window sash is opened. In this embodiment, the choke portion 22 is configured such that the positioning member 122 can still stably stop on the window frame when the window sash is opened by less than 30 °, that is, the control mechanism can still stably stop on the window frame when the window sash is opened by less than 30 °. In addition, referring to fig. 11, a plurality of protrusions 221 may be additionally provided on the side wall of the throat portion 22 of the sliding groove 2 to increase the positioning friction force between the window sashes at 0-30 °, so as to solve the problem that the window sashes of the products with similar functions cannot be effectively and stably parked when being opened at about 0-30 °.

Furthermore, the positioning element 122 may further include a connecting piece 1225, the connecting piece 1225 has a fixed end and an inserting end, the fixed end is detachably fixed on the positioning block 1222, the inserting end is inserted below the first movable element 121, and the inserting end is provided with a first positioning hole 1221. Specifically, the fixed end of the connecting piece 1225 may be detachably fixed to the positioning block 1222 by a rivet, and the fixed end may be stopped on the sliding groove 2 due to friction.

In some examples, please refer to fig. 1 in combination, the side of the fixed seat 11 further includes a second movable member 113, the second movable member 113 is connected with the fixed seat 11 to form a movable pair, and a rack 1131 is disposed on a side wall of the second movable member 113; the end of the linkage rod 13 is provided with a gear 131 engaged with the rack 1131. The fixing seat 11 is a long-strip-shaped stainless steel or aluminum alloy block, a boss 111 is convexly arranged on the side wall of the fixing seat 11 of the stainless steel or aluminum alloy block along the length direction, and the boss 111 enables the top surface of the fixing seat 11 to form a step-shaped structure; then, the fixed seat 11 is provided with a flange 112 on the side wall opposite to the boss 111, and the flange 112 and the boss 111 enclose the fixed seat 11 into a track capable of slidably connecting with the second movable member 113, so that the second movable member 113 and the fixed seat 11 are slidably connected to form a moving pair. In this embodiment, second movable member 113 has a certain height, rack 121 is disposed on a side of second movable member 113 near flange 112, and linkage rod 13 is hinged to boss 111, so that gear 131 can always mesh with rack 1131. In addition, the fixed seat 11 includes an elastic element 114, one end of the elastic element 114 is connected to the second movable member 113, and the other end is disposed on the fixed seat 11; when the second movable member 113 moves relative to the fixed base 11, the elastic element 114 is compressed or stretched. In the present embodiment, the elastic element 114 may be a compression spring or a tension spring. Thus, the elastic element 114 enables the second movable member 113 and the fixed seat 11 to form a moving pair, so that when the linkage rod 13 rotates, the gear 131 is always engaged with the rack 1131, and the window sash is driven to open and close. It is understood that the elastic force of the elastic element 114 is smaller than the parking force of the positioning member 122; in this way, it is ensured that the positioning member 122 can be parked on the window frame when the temperature sensing member is intact and the window sash is opened, and the elastic member 114 can promote the automatic closing of the window sash when the temperature sensing member is deformed.

In this embodiment, the linkage rod 13 is a connecting member between the window frame and the window sash, and is used for supporting the window sash when the window sash is opened. One end of the linkage rod 13 is hinged on the fixed seat 11, and the other end is hinged on the first movable part 121. Therefore, the first movable member 121 is driven to move by opening the window sash, and the window sash is driven to close by moving the first movable member 121. The window sash and the window frame are not particularly limited in this embodiment, wherein the window sash may include a window sash frame.

According to the utility model discloses an embodiment, the utility model discloses still provide a fire window, its headstock gear 1 that includes foretell casement. Therefore, the fixing seat 11 is arranged on the window sash, and the control mechanism 12 is arranged on the window frame, so that when wind power is large, the control mechanism 12 can still be firmly positioned on the window frame, and compared with an existing opening and closing device of the window sash, the device can bear large wind power, and the fireproof performance of the fireproof window is guaranteed.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (12)

1. The opening and closing device of casement installs on casement and window frame, its characterized in that, the opening and closing device of casement includes:

a fixed seat;

the temperature sensing piece is clamped in the clamping groove to position the swinging piece to limit the movement of the first moving piece, and in the second state, the temperature sensing piece deforms and swings and breaks away from the swinging piece to enable the first moving piece to move;

one end of the linkage rod is connected with the fixed seat, and the other end of the linkage rod is connected with the first movable part so as to drive the linkage rod to rotate to close the window sash through the movement of the first movable part.

2. Device for opening and closing a window sash according to claim 1, characterised in that said holder is adapted to be mounted on a window sash or frame; when the fixed seat is arranged on the window sash, the control mechanism is arranged on the window frame; when the fixed seat is arranged on the window frame, the control mechanism is arranged on the window sash.

3. The window sash opening and closing device as claimed in claim 2, wherein the positioning member is provided with a first aligning hole, and the first movable member is provided with a second aligning hole; in the first state, the first aligning hole is aligned above the second aligning hole, and the swinging member is inserted into the first aligning hole and the second aligning hole to be positioned on the positioning member to limit the movement of the first moving member.

4. The window sash opening and closing device of claim 2, wherein in the first state, the swinging member abuts on a bottom surface of the frame or the sash and is positioned on the frame or the sash by a frictional force generated between the swinging member and the bottom surface of the frame or the sash.

5. The opening and closing device for a window sash according to claim 3 or 4, wherein the oscillating member comprises a torsion spring and an oscillating block, the oscillating block is provided at both connecting ends of the torsion spring, and the torsion spring is hinged to the first movable member.

6. The window sash opening and closing device of claim 3, wherein the positioning member comprises a positioning block and a fastening member, the positioning block is provided with an opening, and the fastening member is inserted into the opening from the top end, the bottom end or the front end of the opening to position the positioning block on the window frame or the window sash.

7. The window sash opening and closing device of claim 6, further comprising a connecting piece having a fixed end and an insertion end, wherein the fixed end is detachably fixed to the positioning block, the insertion end is inserted below the first movable member, and the insertion end is provided with a first positioning hole.

8. The window sash opening and closing device of claim 5, wherein the locking groove has an adjusting screw disposed on the first movable member and a second through hole disposed on the swing block, and the adjusting screw locks the temperature sensing member in the second through hole to lock the temperature sensing member in the locking groove.

9. The window sash opening and closing device according to claim 1, further comprising a second movable member connected to the fixed seat to form a pair of movable members, wherein a rack is provided on a side wall of the second movable member; and a gear meshed with the rack is arranged at the end part of the linkage rod.

10. The window sash opening and closing device of claim 9, further comprising an elastic element, one end of the elastic element being connected to the second movable member and the other end being disposed on the fixed seat; when the second movable piece moves relative to the fixed seat, the elastic element is compressed or stretched.

11. The window sash opening and closing device of claim 2, wherein the window frame is provided with a sliding groove, the bottom surface of the sliding groove protrudes upward to form a protrusion, and the inner wall of a part of the sliding groove is recessed inward to form a throat; when the fixed seat is installed on the window sash, the positioning piece is positioned on the sliding groove containing the necking part.

12. A fire resistant window including a sash opening and closing device as claimed in any one of claims 1 to 10.

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