Casement window with screen

Abstract

The invention relates to the field of doors and windows, and discloses a casement window with a screen. The window sashes are hinged in the window frame, and the multiple window sashes are arranged in the window frame in the left-right direction; the screen window assembly comprises a screen sash, an upper sliding seat and a lower sliding seat, the upper sliding seat and the lower sliding seat are slidably connected into the window frame in the left-right direction and located on the rear side of the window sash, one side of the screen sash is rotationally connected between the upper sliding seat and the lower sliding seat, and the other side of the screen sash can be locked or unlocked between the upper sliding seat and the lower sliding seat. According to the casement window, only one screen sash can be arranged in the casement window with two or more window sashes, when the screen sash needs to be used, the screen sash slides to the position of the corresponding opened window, and in addition, the screen sash can be rotationally opened, so that the whole casement window has a full ventilation function, the overall use function is enriched, and the application range of the casement window is widened. And the use experience of the screen sash in the casement window is improved.

Description

Technical Field

[0001] The invention relates to the field of doors and windows, in particular to a casement window with yarn. Background Art

[0002] Casement windows are a type of window and door. When in use, the window sash in the window frame can be rotated to open or close. With the development of society, casement windows have more and more functions. For example, a screen fan is installed in the casement window. At present, a screen fan is generally set in the window frame corresponding to each window sash. When there are two or more window sashes, a screen fan is also set in the corresponding position of each window sash. This makes the entire casement window structure bloated and the production cost high. In addition, in use, usually only one screen fan is opened for use, which wastes the setting of the other multiple screen fans. Therefore, there is an urgent need for a casement window that can reduce the number of screen fans used. Summary of the invention

[0003] The technical problem to be solved by the present invention is to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problem is: A casement window with a screen comprises: a window frame; a window sash hinged in the window frame, a plurality of window sashes being arranged in the window frame along the left-right direction; a screen window assembly, comprising a screen sash, an upper slide seat and a lower slide seat, the upper slide seat and the lower slide seat being respectively connected to the window frame by sliding along the left-right direction, the upper slide seat and the lower slide seat being respectively located at the rear side of the window sash, one side of the screen sash being rotatably connected between the upper slide seat and the lower slide seat, and the other side of the screen sash being connectable, locked or released between the upper slide seat and the lower slide seat.

[0005] This technical solution has at least the following beneficial effects: multiple window sashes are hinged in the window frame and can be rotated to open or close respectively in the window frame. For example, there are two window sashes. When the window sash on the left is opened and the window sash on the right is closed, and it is necessary to use the screen fan at the left side of the window frame, the upper slide seat and the lower slide seat can be slid to the left side of the window frame respectively, driving the screen fan to move to the left side of the window frame, and the screen fan connection is locked between the upper slide seat and the lower slide seat. At this time, the screen fan can be used to block the window position opened on the left side of the window frame to reduce mosquitoes from entering the room. Similarly, when the window sash on the left is closed and the window sash on the right is opened, and it is necessary to use the screen fan at the right side of the window frame, the upper slide seat and the lower slide seat can be slid to the right side of the window frame respectively. The screen fan is driven to move to the right side of the window frame. At this time, the screen fan is also connected and locked between the upper sliding seat and the lower sliding seat to block the open window position on the right side of the window frame. In addition, the other side of the rotational connection of the screen fan can be disconnected from the upper sliding seat and the lower sliding seat. At this time, the screen fan can be rotated open to reduce the blocking of the window position. It is especially suitable for the full ventilation state with both window sashes open. In this way, only one screen fan can be set in the casement window with two or more window sashes. When the screen fan is needed, just slide the screen fan to the corresponding open window position. In addition, the screen fan can also be rotated open to make the entire casement window have the function of full ventilation, enriching the overall use function and improving the use experience of the screen fan in the casement window.

[0006] As a further improvement of the above technical solution, locking pieces are respectively provided at the bottom of the left and right sides of the window frame, and connecting pieces are respectively provided at the left and right sides of the lower sliding seat. The connecting piece on the left side can be connected and locked or disconnected with the locking piece on the left side, and the connecting piece on the right side can be connected and locked or disconnected with the locking piece on the right side. When the screen fan slides to the left side of the window frame, the connecting piece on the left side of the screen fan can be connected and locked with the connecting piece on the left side of the window frame, thereby locking the position of the screen fan and improving the protection function of the entire window. When the screen fan needs to be slid again, the connecting piece on the left side of the screen fan can be disconnected from the connecting piece on the left side of the window frame. Similarly, when the screen fan slides to the right side of the window frame, the connecting piece on the right side of the screen fan can be connected and locked with the connecting piece on the right side of the window frame, thereby locking the position of the screen fan. When the screen fan needs to be slid again, the connecting piece on the right side of the screen fan can be disconnected from the connecting piece on the right side of the window frame.

[0007] As a further improvement of the above technical solution, the locking member includes a lock seat, a first spring and a lock tongue, the lock seat is connected to the bottom side of the window frame, the lock tongue is slidably connected to the rear side of the lock seat along the front-to-back direction, the first spring is connected to the lock seat and resists the lock tongue, the first spring has a tendency to press the lock tongue backward to the end of the stroke, and the rear side surface of the lock tongue gradually tilts backward in the direction away from the center of the window frame. The connecting member includes a connecting seat and a push rod, the connecting seat is connected to the lower sliding seat, the front side of the connecting seat is provided with a lock groove, the push rod is slidably connected to the connecting seat along the front-to-back direction, the front end of the push rod extends into the lock groove, and the rear end of the push rod protrudes from the connecting seat, the lock tongue can enter the lock groove backward to connect and lock, or the push rod pushes the lock tongue forward out of the lock groove to release the connection. When the screen fan slides to the left to the left side of the window frame, the connecting seat located in the left connecting piece abuts against the locking tongue located in the left locking piece. Since the rear side surface of the locking tongue gradually tilts backward in the direction away from the center of the window frame, as the screen fan slides to the left, the locking tongue can be gradually pushed forward, causing the first spring to be elastically compressed. When the locking tongue is directly opposite to the locking groove on the front side of the connecting seat, the first spring presses the locking tongue backward into the locking groove and pushes the push rod backward to the end of the stroke, so that the connection and locking between the screen fan and the window frame can be achieved. When the screen fan needs to be slid again, the push rod is pushed forward to make the locking tongue exit the locking groove. At this time, the connection between the screen fan and the window frame can be released, which is convenient to use.

[0008] As a further improvement of the above technical solution, the rear side of the yarn fan is rotatably connected with a handle, the handle is rotatably connected to the position inside the yarn fan and is connected with a transmission gear, a locking rod is slidably connected inside the yarn fan along the up-down direction, the locking rod is provided with a tooth groove that meshes with the transmission gear, and the tooth groove is provided with a plurality of teeth in the up-down direction, and the handle can drive the locking rod to insert into at least one of the upper slide seat and the lower slide seat to connect and lock, or drive the locking rod to withdraw from at least one of the upper slide seat and the lower slide seat to release the connection. When the yarn fan needs to be connected and locked between the upper slide seat and the lower slide seat, the yarn fan is rotated to between the upper slide seat and the lower slide seat, and then the handle is rotated, and the locking rod is driven to insert upward into the upper slide seat or downward into the lower slide seat through the meshing transmission of the transmission gear and the tooth groove, so as to realize the connection and locking of the yarn fan, and when the yarn fan needs to be rotated to open, the handle is rotated in the opposite direction so that the locking rod withdraws downward from the upper slide seat or withdraws upward from the lower slide seat, and the connection of the yarn fan can be released.

[0009] As a further improvement of the above technical solution, the locking rods are provided on both the left and right sides of the transmission gear, and the handle can drive the two locking rods to be respectively inserted into the upper slide seat and the lower slide seat for connection and locking, or drive the two locking rods to be respectively withdrawn from the upper slide seat and the lower slide seat for release. When the yarn fan is connected and locked, the handle can be turned to drive the two locking rods to be respectively inserted into the upper slide seat and the lower slide seat through the transmission gear, thereby connecting and locking the upper and lower sides of the yarn fan, strengthening the stability of the locking and fixing of the yarn fan, and when the yarn fan needs to be turned to open, the handle is turned in the opposite direction to make the two locking rods withdraw from the upper slide seat and the lower slide seat, and the connection with the yarn fan can be released.

[0010] As a further improvement of the above technical solution, the end positions of the two locking rods in the yarn fan are respectively connected with second springs, and the two second springs are respectively pressed against the ends of the two locking rods, and the two second springs have a tendency to press the two locking rods into the upper slide seat and the lower slide seat respectively. In a natural state, the two second springs press the two locking rods, so that the two locking rods are respectively pressed into the upper slide seat and the lower slide seat, so that the connection and locking state of the two locking rods to the upper slide seat and the lower slide seat can be maintained. When the connection with the yarn fan needs to be released, the two locking rods can be driven to withdraw from the upper slide seat and the lower slide seat respectively by turning the handle, and at this time, the two springs elastically compress the first spring and the second spring respectively.

[0011] As a further improvement of the above technical solution, an upper positioning step is provided at the rear bottom of the upper slide, and a lower positioning step is provided at the rear top of the lower slide, and when the yarn fan is connected and locked between the upper slide and the lower slide, the upper and lower sides of the yarn fan are respectively connected in the upper positioning step and the lower positioning step. When the yarn fan rotates to achieve connection and locking with the upper slide and the lower slide, the upper and lower sides of the yarn fan are respectively connected in the upper positioning step and the lower positioning step, which can better limit the movement of the upper and lower sides of the yarn fan and improve the tightness of the connection between the yarn fan and the upper slide and the lower slide.

[0012] As a further improvement of the above technical solution, the upper positioning step and the lower positioning step are respectively connected with sealing strips at positions opposite to the gauze fan. When the gauze fan is locked and connected with the upper slide seat and the lower slide seat, the gauze fan elastically compresses the sealing strips in the upper positioning step and the lower positioning step, and the sealing strips are used to further fill the assembly gap between the gauze fan and the upper positioning step and the lower positioning step, and improve the stability of the gauze fan when it is connected and locked.

[0013] As a further improvement of the above technical solution, the left front side and the right front side of the gauze fan are respectively connected with wool strips. When the gauze fan is used to block the window position, the wool strips on the left front side and the right front side can respectively abut against the window frame and the window sash, thereby further improving the mosquito protection effect of the gauze fan.

[0014] As a further improvement of the above technical solution, the upper slide seat and the lower slide seat are detachably connected to the window frame. The upper slide seat and the lower slide seat can be removed from the window frame, which is convenient for cleaning and maintenance of the screen fan and improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0016] Figure 1 It is an overall front view of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the AA cross-section structure.

[0018] Figure 3 yes Figure 2 B is a partial enlarged schematic diagram.

[0019] Figure 4 It is a partial structural schematic diagram of the screen window assembly of the present invention.

[0020] In the accompanying drawings: 1-window frame, 2-window sash, 3-screen sash, 32-upper slide seat, 33-lower slide seat, 331-lower positioning step, 341-lock seat, 342-first spring, 343-lock tongue, 351-connecting seat, 352-top rod, 41-handle, 42-transmission gear, 43-lock rod, 44-second spring. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0022] Reference Figures 1 to 4A casement window with screen, comprising: a window frame 1, a window sash 2 and a screen window assembly; the window sash 2 is hinged in the window frame 1, and the window sash 2 is provided with multiple pieces in the window frame 1 along the left and right directions; the screen window assembly comprises a screen fan 3, an upper slide seat 32 and a lower slide seat 33, the upper slide seat 32 and the lower slide seat 33 are respectively connected to the window frame 1 in a sliding manner along the left and right directions, the upper slide seat 32 and the lower slide seat 33 are respectively located at the rear side of the window sash 2, one side of the screen fan 3 is rotatably connected between the upper slide seat 32 and the lower slide seat 33, and the other side of the screen fan 3 can be connected, locked or released between the upper slide seat 32 and the lower slide seat 33.

[0023] In this casement window with screen, multiple window sashes 2 are hinged in the window frame 1 and can be rotated to open or close respectively in the window frame 1. For example, there are two window sashes 2. When the window sash 2 on the left is opened and the window sash 2 on the right is closed, and it is necessary to use the screen fan 3 at the left side of the window frame 1, the upper sliding seat 32 and the lower sliding seat 33 can be slid to the left side of the window frame 1 respectively, driving the screen fan 3 to move to the left side of the window frame 1, and the screen fan 3 is connected and locked between the upper sliding seat 32 and the lower sliding seat 33. At this time, the screen fan 3 can be used to block the window position opened on the left side of the window frame 1 to reduce mosquitoes from entering the room. Similarly, when the window sash 2 on the left is closed and the window sash 2 on the right is opened, and it is necessary to use the screen fan 3 at the right side of the window frame 1, the upper sliding seat 32 and the lower sliding seat 33 can be slid to the right side of the window frame 1 , driving the screen fan 3 to move to the right side of the window frame 1. At this time, the screen fan 3 is also connected and locked between the upper slide seat 32 and the lower slide seat 33 to play a role in blocking the window position of the window frame 1 at the right side. In addition, the other side of the rotation connection of the screen fan 3 can be released from the upper slide seat 32 and the lower slide seat 33. At this time, the screen fan 3 can be rotated to open to reduce the blocking of the window position, which is particularly suitable for the full ventilation state when both window sashes 2 are opened. In this way, only one screen fan 3 can be set in the casement window with two or more window sashes 2. When the screen fan 3 is needed, the screen fan 3 can be slid to the corresponding opened window position. In addition, the screen fan 3 can be rotated to open, so that the entire casement window has the function of full ventilation, enriching the overall usage function and improving the usage experience of the screen fan 3 in the casement window.

[0024] When the screen fan 3 slides into place in the window frame 1, the position of the screen fan 3 can be locked, thereby improving the stability of the screen fan 3 when in use. Figure 3As shown, in this embodiment, the bottoms of the left and right sides of the window frame 1 are respectively provided with locking pieces, and the left and right sides of the lower slide seat 33 are respectively provided with connecting pieces, and the connecting piece on the left side can be connected and locked or disconnected with the locking piece on the left side, and the connecting piece on the right side can be connected and locked or disconnected with the locking piece on the right side. When the screen fan 3 slides to the left side of the window frame 1, the connecting piece on the left side of the screen fan 3 can be connected and locked with the connecting piece on the left side of the window frame 1, thereby locking the position of the screen fan 3 and improving the protection function of the whole window. When the screen fan 3 needs to be slid again, the connecting piece on the left side of the screen fan 3 can be disconnected from the connecting piece on the left side of the window frame 1. Similarly, when the screen fan 3 slides to the right side of the window frame 1, the connecting piece on the right side of the screen fan 3 can be connected and locked with the connecting piece on the right side of the window frame 1, thereby locking the position of the screen fan 3. When the screen fan 3 needs to be slid again, the connecting piece on the right side of the screen fan 3 can be disconnected from the connecting piece on the right side of the window frame 1.

[0025] There are many ways to connect the locking member and the connecting member to each other for locking or releasing the connection. For example, the locking member and the connecting member are a snap-on connection structure. In order to further improve the stability of the connection between the two, in the present embodiment, the locking member includes a lock seat 341, a first spring 342 and a lock tongue 343. The lock seat 341 is connected to the bottom side of the window frame 1, and the lock tongue 343 is slidably connected to the rear side of the lock seat 341 along the front-to-back direction. The first spring 342 is connected to the lock seat 341 and abuts against the lock tongue 343. The first spring 342 has a tendency to press the lock tongue 343 backward to the end of the stroke. The rear side surface of the locking tongue 343 gradually tilts backward in the direction away from the center of the window frame 1. The connecting member includes a connecting seat 351 and a push rod 352. The connecting seat 351 is connected to the lower sliding seat 33. A locking groove is provided on the front side of the connecting seat 351. The push rod 352 is slidably connected to the connecting seat 351 along the front-to-back direction. The front end of the push rod 352 extends into the locking groove, and the rear end of the push rod 352 protrudes from the connecting seat 351. The locking tongue 343 can enter the locking groove backward to connect and lock, or the push rod 352 pushes the locking tongue 343 forward out of the locking groove to release the connection. When the screen fan 3 slides to the left to the left position of the window frame 1, the connecting seat 351 located in the left connecting piece abuts against the locking tongue 343 located in the left locking piece. Since the rear side surface of the locking tongue 343 gradually tilts backward in the direction away from the center of the window frame 1, as the screen fan 3 slides to the left, the locking tongue 343 can be gradually pushed forward, so that the first spring 342 is elastically compressed. When the locking tongue 343 is directly opposite to the locking groove on the front side of the connecting seat 351, the first spring 342 presses the locking tongue 343 backward into the locking groove and pushes the push rod 352 backward to the end of the stroke, so that the connection and locking of the screen fan 3 and the window frame 1 can be achieved; when the screen fan 3 needs to be slid again, the push rod 352 is pushed forward to make the locking tongue 343 withdraw from the locking groove. At this time, the connection between the screen fan 3 and the window frame 1 can be released, which is convenient to use.

[0026] As for the specific method of locking or releasing the connection between the upper slide seat 32 and the lower slide seat 33, Figure 4As shown, in the present embodiment, the rear side of the yarn fan 3 is rotatably connected with a handle 41, and the handle 41 is rotatably connected to a position inside the yarn fan 3 and is connected with a transmission gear 42. A locking rod 43 is slidably connected inside the yarn fan 3 along the up and down directions, and the locking rod 43 is provided with a tooth groove that meshes with the transmission gear 42, and the tooth groove is provided in multiple numbers along the up and down directions. The handle 41 can drive the locking rod 43 to insert into at least one of the upper slide seat 32 and the lower slide seat 33 to connect and lock, or drive the locking rod 43 to withdraw from at least one of the upper slide seat 32 and the lower slide seat 33 to release the connection. When it is necessary to connect and lock the yarn fan 3 between the upper slide seat 32 and the lower slide seat 33, the yarn fan 3 is rotated between the upper slide seat 32 and the lower slide seat 33, and then the handle 41 is rotated. Through the meshing transmission of the transmission gear 42 and the tooth groove, the locking rod 43 is driven to insert upward into the upper slide seat 32 or downward into the lower slide seat 33 to achieve the connection and locking of the yarn fan 3. When it is necessary to rotate and open the yarn fan 3, the handle 41 is rotated in the opposite direction, so that the locking rod 43 withdraws downward from the upper slide seat 32 or withdraws upward from the lower slide seat 33, and the connection with the yarn fan 3 can be released.

[0027] The number of the locking rod 43 can be only one. At this time, when the yarn fan 3 is connected and locked, the locking rod 43 is only connected and fixed to the upper slide seat 32 and the lower slide seat 33. In this embodiment, the locking rod 43 is provided on both the left and right sides of the transmission gear 42. The handle 41 can drive the two locking rods 43 to be inserted into the upper slide seat 32 and the lower slide seat 33 respectively to connect and lock, or drive the two locking rods 43 to withdraw from the upper slide seat 32 and the lower slide seat 33 respectively to release the connection. When the yarn fan 3 is connected and locked, the handle 41 is rotated, and the two locking rods 43 can be driven by the transmission gear 42 to be inserted into the upper slide seat 32 and the lower slide seat 33 respectively, so as to connect and lock the upper and lower sides of the yarn fan 3, and strengthen the stability of the locking and fixing of the yarn fan 3. When the yarn fan 3 needs to be rotated to open, the handle 41 is rotated in the opposite direction, so that the two locking rods 43 withdraw from the upper slide seat 32 and the lower slide seat 33, and the connection of the yarn fan 3 can be released.

[0028] Furthermore, the end positions of the two locking rods 43 in the yarn fan 3 are respectively connected with second springs 44, and the two second springs 44 are respectively pressed against the ends of the two locking rods 43, and the two second springs 44 have a tendency to press the two locking rods 43 into the upper slide seat 32 and the lower slide seat 33. In a natural state, the two second springs 44 press the two locking rods 43, so that the two locking rods 43 are respectively pressed into the upper slide seat 32 and the lower slide seat 33, so that the connection and locking state of the two locking rods 43 to the upper slide seat 32 and the lower slide seat 33 can be maintained. When the connection with the yarn fan 3 needs to be released, the handle 41 can be turned to drive the two locking rods 43 to withdraw from the upper slide seat 32 and the lower slide seat 33 respectively, and at this time, the two springs elastically compress the first spring 342 and the second spring 44 respectively.

[0029] In order to more quickly rotate the yarn fan 3 to the position between the upper slide 32 and the lower slide 33, in this embodiment, an upper positioning step is provided at the rear bottom of the upper slide 32, and a lower positioning step 331 is provided at the rear top of the lower slide 33. When the yarn fan 3 is connected and locked between the upper slide 32 and the lower slide 33, the upper and lower sides of the yarn fan 3 are respectively connected in the upper positioning step and the lower positioning step 331. When the yarn fan 3 is rotated to achieve the connection and locking with the upper slide 32 and the lower slide 33, the upper and lower sides of the yarn fan 3 are respectively connected in the upper positioning step and the lower positioning step 331, which can better limit the movement of the upper and lower sides of the yarn fan 3 and improve the tightness of the connection between the yarn fan 3 and the upper slide 32 and the lower slide 33.

[0030] Furthermore, the upper positioning step and the lower positioning step 331 are respectively connected with sealing strips at positions facing the veil fan 3. When the veil fan 3 is locked and connected with the upper slide seat 32 and the lower slide seat 33, the veil fan 3 elastically compresses the sealing strips in the upper positioning step and the lower positioning step 331, and the sealing strips are used to further fill the assembly gap between the veil fan 3 and the upper positioning step and the lower positioning step 331, and improve the stability of the veil fan 3 when connected and locked.

[0031] In some embodiments, the left front side and the right front side of the screen fan 3 are respectively connected with wool strips. When the screen fan 3 blocks the window position, the wool strips on the left front side and the right front side can respectively abut against the window frame 1 and the window sash 2, thereby further improving the mosquito protection effect of the screen fan 3.

[0032] In some embodiments, the upper slide seat 32 and the lower slide seat 33 are detachably connected to the window frame 1. For example, an upper slide rail and a lower slide rail are slidably connected to the upper and lower sides of the window frame 1 through dovetail grooves, and the upper slide seat 32 is connected to the upper slide rail by screw locking, and the lower slide seat 33 is connected to the lower slide rail by screw locking. The upper slide seat 32 and the lower slide seat 33 can be removed from the window frame 1, which is convenient for cleaning and maintenance of the screen fan 3 and improves the convenience of use.

[0033] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

[0034] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A casement window with yarn, characterized in that: include: Window frame (1); A window sash (2) is hingedly connected to the window frame (1), and a plurality of window sashes (2) are arranged in the window frame (1) along the left-right direction; A screen window assembly comprises a screen fan (3), an upper slide seat (32) and a lower slide seat (33); the upper slide seat (32) and the lower slide seat (33) are respectively connected to the window frame (1) in a sliding manner in the left-right direction; the upper slide seat (32) and the lower slide seat (33) are respectively located at the rear side of the window fan (2); one side of the screen fan (3) is rotatably connected between the upper slide seat (32) and the lower slide seat (33); and the other side of the screen fan (3) can be connected, locked or released between the upper slide seat (32) and the lower slide seat (33).

2. A casement window with yarn according to claim 1, characterized in that: The bottoms of the left and right sides of the window frame (1) are respectively provided with locking pieces, and the left and right sides of the lower sliding seat (33) are respectively provided with connecting pieces, the connecting piece on the left side can be connected to the locking piece on the left side to be locked or released, and the connecting piece on the right side can be connected to the locking piece on the right side to be locked or released.

3. A casement window with yarn according to claim 2, characterized in that: The locking member comprises a lock seat (341), a first spring (342) and a lock tongue (343); the lock seat (341) is connected to the bottom side of the window frame (1); the lock tongue (343) is slidably connected to the rear side of the lock seat (341) along the front-rear direction; the first spring (342) is connected to the lock seat (341) and abuts against the lock tongue (343); the first spring (342) has a tendency to press the lock tongue (343) backward to the end of the stroke; the rear side surface of the lock tongue (343) gradually tilts backward in a direction away from the center of the window frame (1); The connecting member comprises a connecting seat (351) and a push rod (352), wherein the connecting seat (351) is connected to a lower sliding seat (33), a locking groove is arranged on the front side of the connecting seat (351), and the push rod (352) is slidably connected to the connecting seat (351) along a front-to-back direction, a front end of the push rod (352) extends into the locking groove, and a rear end of the push rod (352) protrudes from the connecting seat (351), and the locking tongue (343) can enter the locking groove backwards to connect and lock, or the push rod (352) pushes the locking tongue (343) forwards out of the locking groove to release the connection.

4. The casement window with yarn according to claim 1, characterized in that: The rear side of the yarn fan (3) is rotatably connected to a handle (41), and the handle (41) is rotatably connected to a position inside the yarn fan (3) and is connected to a transmission gear (42). A locking rod (43) is slidably connected inside the yarn fan (3) in an up-and-down direction, and the locking rod (43) is provided with a tooth groove that meshes with the transmission gear (42). A plurality of tooth grooves are provided in the up-and-down direction. The handle (41) can drive the locking rod (43) to insert into at least one of the upper slide seat (32) and the lower slide seat (33) to connect and lock, or drive the locking rod (43) to withdraw from at least one of the upper slide seat (32) and the lower slide seat (33) to release the connection.

5. A casement window with yarn according to claim 4, characterized in that: The locking rods (43) are arranged on both left and right sides of the transmission gear (42), and the handle (41) can drive the two locking rods (43) to be respectively inserted into the upper slide seat (32) and the lower slide seat (33) to connect and lock, or drive the two locking rods (43) to be respectively withdrawn from the upper slide seat (32) and the lower slide seat (33) to release the connection.

6. A casement window with yarn according to claim 5, characterized in that: Second springs (44) are respectively connected to the end positions of the two locking rods (43) in the yarn fan (3), and the two second springs (44) are respectively pressed against the ends of the two locking rods (43), and the two second springs (44) have a tendency to press the two locking rods (43) into the upper slide seat (32) and the lower slide seat (33), respectively.

7. The casement window with yarn according to claim 1, characterized in that: An upper positioning step is provided at the rear bottom of the upper slide seat (32), and a lower positioning step (331) is provided at the rear top of the lower slide seat (33). When the gauze fan (3) is connected and locked between the upper slide seat (32) and the lower slide seat (33), the upper and lower sides of the gauze fan (3) are respectively connected in cooperation with the upper positioning step and the lower positioning step (331).

8. The casement window with yarn according to claim 7, characterized in that: Sealing strips are respectively connected to the positions of the upper positioning step and the lower positioning step (331) facing the screen fan (3).

9. The casement window with yarn according to claim 1, characterized in that: The left front side and the right front side of the yarn fan (3) are respectively connected to wool strips.

10. The casement window with yarn according to claim 1, characterized in that: The upper sliding seat (32) and the lower sliding seat (33) are respectively detachably connected to the window frame (1).

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