Casement window

Abstract

The invention relates to the field of doors and windows, and discloses a casement window. The window sash is located in the window frame, a hinge is arranged between the window sash and the window frame, a first rotating rod capable of rotating relative to the window sash is arranged in the hinge, a rotating shaft is arranged at the position, rotating relative to the window sash, of the first rotating rod, and the rotating shaft is upwards inserted into the bottom side of the window sash; the locking mechanism comprises a handle, a transmission assembly and a rotation stopping sleeve, the handle is rotationally connected to one side of the window sash, the handle is in transmission connection with the rotation stopping sleeve through the transmission assembly, and the handle can drive the rotation stopping sleeve to be downwards connected to the rotating shaft in a sleeving mode to limit rotation of the rotating shaft or drive the rotation stopping sleeve to be upwards separated from the rotating shaft to relieve rotation limitation of the rotating shaft; according to the casement window, after the window sash is rotated and opened to the needed position, the rotation stopping sleeve is downwards connected to the outer side of the rotating shaft in a sleeving mode to conduct rotation limiting, so that the window sash is positioned, the situation that the window sash is blown due to large wind pressure is effectively prevented, and the using flexibility and safety of the casement window are improved.

Description

Technical Field

[0001] The present invention relates to a door and window, in particular to a casement window. Background Art

[0002] Casement windows are a type of window in which the sash is pivoted and mounted within the window frame using hardware such as hinges or hinges, allowing the sash to open and close horizontally. Current casement windows can hover at any angle after being opened within the frame. However, there is no mechanism to position the sash relative to the frame. When subjected to strong wind pressure, the sash can be driven rapidly to fully open or close, potentially damaging the hinges and other hardware, as well as the sash structure, leading to safety incidents such as falling windows. Therefore, a casement window that can position the sash after opening is urgently needed. Summary of the Invention

[0003] The object of the present invention is to provide a casement window 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 problems is:

[0005] A casement window comprises: a window frame; a window sash, which is located in the window frame, a hinge is provided between the window sash and the window frame, the hinge has a first rotating rod that can rotate relative to the window sash, the first rotating rod is provided with a rotating shaft at a position relative to the window sash, and the rotating shaft is inserted upward into the bottom side of the window sash; a locking mechanism comprises a handle, a transmission assembly and a stop sleeve, the handle is rotatably connected to one side of the window sash, the stop sleeve is located in the window sash and directly above the rotating shaft, the handle is transmission-connected to the stop sleeve via the transmission assembly, the handle can drive the stop sleeve downward to fit on the rotating shaft to limit the rotation of the rotating shaft, or drive the stop sleeve upward to separate from the rotating shaft to release the rotation restriction of the rotating shaft.

[0006] The technical solution has at least the following beneficial effects: The window sash is rotatably connected to the window frame through a hinge and can be rotated open or closed within the window frame. When the window sash rotates within the window frame, the first rotating rod within the hinge drives the rotating shaft to rotate relatively within the window sash. When it is not necessary to rotate the window sash within the window frame, the handle drives the anti-rotation sleeve to be sleeved downward outside the rotating shaft through the transmission assembly, thereby restricting the rotation of the rotating shaft. Since the rotation of the first rotating rod relative to the window sash is restricted, the hinge cannot be normally unfolded or folded, thus restricting the opening or closing of the window sash. When it is necessary to open or close the window sash again, the handle drives the anti-rotation sleeve to move upward away from the rotating shaft through the transmission assembly. At this time, the rotation restriction of the rotating shaft is released, and the hinge can resume normal operation, thereby enabling the opening or closing of the window sash. In this way, after the window sash is rotated open to the desired position, the anti-rotation sleeve can be sleeved downward outside the rotating shaft to perform rotation restriction, thereby positioning the window sash, effectively preventing the window sash from being blown by strong wind pressure, and improving the flexibility and safety of the casement window during use.

[0007] As a further improvement of the above technical solution, the transmission assembly includes a transmission rack and a transmission rod. The handle is rotatably connected to a transmission gear at a position inside the window sash. The transmission rack is slidably connected to the side of the window sash in the up and down direction. The transmission gear meshes with the transmission rack. The transmission rod is slidably connected to the bottom of the window sash in the up and down direction. One end of the transmission rod is connected to the bottom end of the transmission rack. The anti-rotation sleeve is connected to the bottom end of the transmission rod. When it is necessary to rotate the window sash, the user holds the handle and drives the handle to rotate. Since the transmission gear on the handle meshes with the transmission rack, as the transmission gear rotates, the transmission rack can be driven to slide upward, thereby driving the transmission rod to slide upward at the bottom of the window sash through the transmission rack, so that the anti-rotation sleeve moves upward away from the rotating shaft. In this way, the rotation restriction of the window sash can be released; when it is necessary to position the window sash, the user rotates the handle in the reverse direction. At this time, the transmission rack can be driven to slide downward, thereby driving the transmission rod to slide downward at the bottom of the window sash through the transmission rack, so that the anti-rotation sleeve is sleeved downward and connected in a mating manner outside the rotating shaft to restrict the rotation of the window sash.

[0008] As a further improvement of the above technical solution, a guide post extending upward is connected to the inner bottom side of the bottom of the window sash. A sliding sleeve extending downward is connected to the bottom side of the transmission rod. The sliding sleeve is slidably connected to the outside of the guide post. Through the sliding fit of the transmission rod with the guide post through the sliding sleeve, the transmission rod can slide up and down at the bottom of the window sash, thereby improving the smoothness of the cooperation or separation between the anti-rotation sleeve and the rotating shaft.

[0009] As a further improvement of the above technical solution, a connecting screw penetrates through the window sash, and the connecting screw is tightly connected to the bottom end of the guide post. After the guide post is placed and positioned at the bottom of the window sash, the connecting screw is penetrated through from the bottom side of the window sash and connected to the bottom end of the guide post, thereby tightly fixing the guide post to the bottom of the window sash.

[0010] As a further improvement to the above technical solution, a first spring is provided between the inner top side of the bottom of the window sash and the top side of the transmission rod. The first spring has a tendency to press the transmission rod downward and cause the anti-rotation sleeve to be downwardly sleeved onto the outside of the rotating shaft. When the window sash position needs to be adjusted by rotation, the transmission rack drives the transmission rod upward, elastically compressing the first spring and causing the anti-rotation sleeve to be upwardly disengaged from the rotating shaft. When the rotation adjustment of the window sash position is completed, the external force on the handle is removed, at which point the first spring elastically resets, applying downward pressure to the transmission rod, causing the anti-rotation sleeve on the bottom side of the transmission rod to remain sleeved onto the outside of the rotating shaft, thereby better maintaining the locked position of the window sash.

[0011] As a further improvement to the above technical solution, a positioning pin is provided through the inner top side of the bottom of the window sash, and the positioning pin is inserted into the first spring. The positioning pin can define the position of the first spring, which not only helps to improve the structural stability of the first spring connected to the bottom of the window sash, but also helps to prevent the first spring from twisting when compressed.

[0012] As a further improvement to the above technical solution, the top of the transmission rack is provided with a mounting slot, within which a second spring is disposed. The second spring protrudes from the transmission rack and abuts against the inner top side of the window frame. The second spring has a tendency to press the transmission rack downward to the bottom of its travel. When the window sash needs to be rotated to adjust its position, turning the handle causes the transmission rack to slide upward, which in turn elastically compresses the second spring at the top of the transmission rack. When the window sash is rotated to adjust its position, the elastic restoring force of the second spring presses the transmission rack downward, causing the handle to reverse and reset, thus improving the smoothness of the handle's reset.

[0013] As a further improvement to the above technical solution, the outer side of the rotating shaft is surrounded by a plurality of anti-rotation teeth, and the inner side of the anti-rotation sleeve is provided with anti-rotation grooves at positions opposite to the plurality of anti-rotation teeth. The plurality of anti-rotation teeth can be respectively engaged with the plurality of anti-rotation grooves. After the anti-rotation sleeve is downwardly mounted on the outer side of the rotating shaft, the plurality of anti-rotation teeth are respectively engaged with the plurality of anti-rotation grooves, thereby limiting relative rotation between the two.

[0014] As a further improvement to the above technical solution, a guide section is formed at the top of the rotating shaft, and the outer diameter of the guide section gradually decreases from top to bottom. Guide teeth are respectively provided on the outer side of the guide section opposite the positions of the plurality of the anti-rotation teeth, and the plurality of guide teeth can respectively enter the plurality of the anti-rotation grooves. A guide section with a smaller outer diameter is formed at the top of the rotating shaft. When the anti-rotation sleeve is downwardly sleeved on the outer side of the rotating shaft, the guide section first enters the anti-rotation sleeve. At this time, the guide teeth on the outer side of the guide section first enter the anti-rotation groove, and then the anti-rotation teeth on the outer side of the rotating shaft enter the anti-rotation groove. This can further improve the smoothness of the rotating shaft's connection with the anti-rotation sleeve.

[0015] As a further improvement of the above technical solution, the hinge includes a fixed rod, a movable rod, a second rotating rod, a connecting rod and a slider. The fixed rod is connected to the window frame, and the movable rod is connected to the window sash. One end of the first rotating rod is rotatably connected to the fixed rod, the rotating shaft is connected to the other end of the first rotating rod, and the rotating shaft is rotatably connected to the middle of the movable rod. The slider is slidably connected to the fixed rod. One end of the second rotating rod is rotatably connected to the slider, and the other end of the second rotating rod is rotatably connected to one end of the movable rod. One end of the connecting rod is rotatably connected to the end of the second rotating rod that is rotatably connected to the slider, and the other end of the connecting rod is rotatably connected to the middle of the first rotating rod. The fixed rod, the movable rod, the first connecting rod and the second connecting rod form a four-bar linkage structure, which can provide stable connection support for the window sash. When the window sash rotates and opens, the movable rod rotates and unfolds relative to the fixed rod. At this time, the slider moves relatively closer to the connection point of the first rotating rod on the fixed rod. When the window sash rotates and closes, the movable rod rotates and folds relative to the fixed rod. At this time, the slider moves relatively farther away from the connection point of the first rotating rod on the fixed rod. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative efforts.

[0017] Figure 1 is the overall structural schematic diagram of the present invention.

[0018] Figure 2 is Figure 1 the partial enlarged schematic diagram of part A of

[0019] Figure 3 is Figure 1 the partial enlarged schematic diagram of part B of

[0020] Figure 4 is the three-dimensional diagram of the hinge of the present invention.

[0021] Figure 5 is Figure 4 the partial enlarged schematic diagram of part C of

[0022] In the drawings: 1 - window frame, 2 - window sash, 21 - guide post, 3 - hinge, 31 - first rotating rod, 32 - rotating shaft, 321 - anti-rotation tooth, 33 - fixed rod, 34 - movable rod, 35 - second rotating rod, 36 - connecting rod, 37 - slider, 41 - handle, 42 - anti-rotation sleeve, 43 - transmission rack, 44 - transmission rod, 441 - sliding sleeve, 45 - first spring, 46 - second spring. DETAILED DESCRIPTION

[0023] 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 those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0024] Reference Figure 1 and Figure 2 The hinge 31 is provided with a first rotating rod 31 which can rotate relative to the window sash 2, and a rotating shaft 32 is provided on the first rotating rod 31 at a position where the window sash 2 rotates relative to the window sash 2, and the rotating shaft 32 is inserted upwardly into the bottom side of the window sash 2; a locking mechanism includes a handle 41, a transmission assembly and a non-rotating sleeve 42, the handle 41 is rotatably connected to one side of the window sash 2, the non-rotating sleeve 42 is located in the window sash 2 and directly above the rotating shaft 32, the handle 41 is transmission-connected to the non-rotating sleeve 42 through the transmission assembly, and the handle 41 can drive the non-rotating sleeve 42 downward to sleeve on the rotating shaft 32 to limit the rotation of the rotating shaft 32, or drive the non-rotating sleeve 42 upward to separate from the rotating shaft 32 to release the rotation restriction of the rotating shaft 32.

[0025] In this casement window, the sash 2 is rotatably connected to the window frame 1 through a hinge 3 and can be rotated open or closed within the window frame 1. When the sash 2 rotates within the window frame 1, the first rotating rod 31 within the hinge 3 drives the rotating shaft 32 to rotate relatively within the sash 2. When it is not necessary to rotate the sash 2 within the window frame 1, the handle 41 drives the anti-rotation sleeve 42 to be sleeved downward outside the rotating shaft 32 through the transmission assembly, thereby restricting the rotation of the rotating shaft 32. Since the rotation of the first rotating rod 31 relative to the sash 2 is restricted, the hinge 3 cannot be normally unfolded or folded, thus restricting the opening or closing of the sash 2. When it is necessary to open or close the sash 2 again, the handle 41 drives the anti-rotation sleeve 42 to move upward away from the rotating shaft 32 through the transmission assembly. At this time, the rotation restriction on the rotating shaft 32 is released, and the hinge 3 can resume normal operation, thereby enabling the opening or closing of the sash 2. In this way, after the sash 2 is rotated open to the required position, the anti-rotation sleeve 42 can be sleeved downward outside the rotating shaft 32 to perform rotation restriction, thereby positioning the sash 2 and effectively preventing the sash 2 from being blown by strong wind pressure, improving the flexibility and safety of the casement window during use.

[0026] The transmission assembly is mainly used to convert the rotational movement of the handle 41 into the up-and-down movement of the transmission rod 44. In this embodiment, the transmission assembly includes a transmission rack 43 and a transmission rod 44. The handle 41 is rotatably connected to a transmission gear at a position inside the sash 2. The transmission rack 43 is slidably connected to the side of the sash 2 in the up-and-down direction. The transmission gear meshes with the transmission rack 43. The transmission rod 44 is slidably connected to the bottom of the sash 2 in the up-and-down direction. One end of the transmission rod 44 is connected to the bottom end of the transmission rack 43. The anti-rotation sleeve 42 is connected to the bottom end of the transmission rod 44. When it is necessary to rotate the sash 2, the user holds the handle 41 and drives the handle 41 to rotate. Since the transmission gear on the handle 41 meshes with the transmission rack 43, as the transmission gear rotates, it can drive the transmission rack 43 to slide upward, thereby driving the transmission rod 44 to slide upward at the bottom of the sash 2 through the transmission rack 43, so that the anti-rotation sleeve 42 moves upward away from the rotating shaft 32, thus releasing the rotation restriction on the sash 2. When it is necessary to position the sash 2, the user rotates the handle 41 in the reverse direction. At this time, it can drive the transmission rack 43 to slide downward, thereby driving the transmission rod 44 to slide downward at the bottom of the sash 2 through the transmission rack 43, so that the anti-rotation sleeve 42 is sleeved downward and connected in cooperation outside the rotating shaft 32 to restrict the rotation of the sash 2.

[0027] For the movable cooperation between the transmission rack 43 and the window sash 2, a sliding groove can be provided inside the window sash 2, and a sliding rail is provided on one side of the transmission rack 43. Through the mutual cooperation of the sliding rail and the sliding groove, the transmission rack 43 can move up and down on one side of the window sash 2. For the movable cooperation of the transmission rod 44 at the bottom of the window sash 2, in this embodiment, a guide post 21 extending upward is connected to the inner bottom side of the bottom of the window sash 2, a sliding sleeve 441 extending downward is connected to the bottom side of the transmission rod 44, and the sliding sleeve 441 is slidably connected to the outside of the guide post 21. Through the sliding cooperation of the sliding sleeve 441 and the guide post 21 of the transmission rod 44, the transmission rod 44 can slide up and down at the bottom of the window sash 2, thereby improving the smoothness of the cooperation or separation between the anti-rotation sleeve 42 and the rotating shaft 32.

[0028] In order to facilitate the fixation of the guide post 21 inside the window sash 2, in this embodiment, a connecting screw penetrates through the window sash 2, and the connecting screw is tightly connected to the bottom end of the guide post 21. After the guide post 21 is placed and positioned at the bottom of the window sash 2, a connecting screw is penetrated through the bottom side of the window sash 2 and connected to the bottom end of the guide post 21, thereby tightly fixing the guide post 21 to the bottom of the window sash 2.

[0029] The anti-rotation sleeve 42 can be sleeved downward on the outside of the rotating shaft 32 by its own gravity to maintain the rotation restriction on the rotating shaft 32. In order to further maintain the anti-rotation cooperation between the anti-rotation sleeve 42 and the rotating shaft 32, as Figure 3 shown, in this embodiment, a first spring 45 is provided between the inner top side of the bottom of the window sash 2 and the top side of the transmission rod 44. The first spring 45 has a tendency to press down the transmission rod 44 and make the anti-rotation sleeve 42 be sleeved downward on the outside of the rotating shaft 32. When it is necessary to rotate and adjust the position of the window sash 2, the transmission rack 43 drives the transmission rod 44 to move upward, elastically compresses the first spring 45, and makes the anti-rotation sleeve 42 disengage from the rotating shaft 32 upward; when the rotation adjustment of the position of the window sash 2 is completed, the external force on the handle 41 is removed. At this time, the first spring 45 elastically returns, and the first spring 45 provides a downward pressure on the transmission rod 44, so that the anti-rotation sleeve 42 at the bottom side of the transmission rod 44 remains sleeved on the outside of the rotating shaft 32, thereby better maintaining the locked state of the position of the window sash 2.

[0030] In order to facilitate the positioning of the positioning pin at the bottom of the window sash 2, in this embodiment, a positioning pin penetrates through the inner top side of the bottom of the window sash 2, and the positioning pin is inserted into the first spring 45. The positioning pin can limit the position of the first spring 45, which is beneficial to improving the structural stability of the connection of the first spring 45 at the bottom of the window sash 2 and is also beneficial to preventing the first spring 45 from twisting when compressed.

[0031] Further, to facilitate the reset of the handle 41 after rotation, in this embodiment, an installation groove is provided at the top end of the transmission rack 43. A second spring 46 is arranged in the installation groove. The second spring 46 protrudes from the transmission rack 43 and abuts against the inner top side of the top of the window frame 1. The second spring 46 has a tendency to press the transmission rack 43 down to the bottom end of the stroke. When it is necessary to rotate and adjust the position of the window sash 2, rotating the handle 41 can drive the transmission rack 43 to slide upward. At this time, the second spring 46 at the top end of the transmission rack 43 is elastically compressed. When the rotation adjustment of the window sash 2 is completed, the elastic restoring force of the second spring 46 presses down the transmission rack 43 and drives the handle 41 to reverse and reset. This is beneficial to improving the smoothness of the reset of the handle 41.

[0032] After the anti-rotation sleeve 42 is sleeved downward on the rotating shaft 32, in order to limit the relative rotation between the two, the outer shape of the rotating shaft 32 can be a regular polygon. Similarly, the inner wall shape of the anti-rotation groove is also a regular polygon to achieve the mutual cooperation between the two. In this embodiment, as Figure 4 And Figure 5 shown, a plurality of anti-rotation teeth 321 are arranged around the outer side of the rotating shaft 32. Anti-rotation grooves are respectively arranged at positions on the inner side of the anti-rotation sleeve 42 opposite to the plurality of anti-rotation teeth 321. The plurality of anti-rotation teeth 321 can be respectively connected and fitted in the plurality of anti-rotation grooves. After the anti-rotation sleeve 42 is sleeved downward on the outer side of the rotating shaft 32, the plurality of anti-rotation teeth 321 are respectively connected and fitted in the plurality of anti-rotation grooves, so as to limit the relative rotation between the two.

[0033] In order to enable the rotating shaft 32 to be inserted into the anti-rotation sleeve 42 more smoothly, in this embodiment, a guiding section is formed at the top end of the rotating shaft 32. The outer diameter of the guiding section gradually decreases from top to bottom. Guiding teeth are respectively arranged at positions on the outer side of the guiding section opposite to the plurality of anti-rotation teeth 321. The plurality of guiding teeth can respectively enter the plurality of anti-rotation grooves. A guiding section with a smaller outer diameter is formed at the top end of the rotating shaft 32. When the anti-rotation sleeve 42 is sleeved downward on the outer side of the rotating shaft 32, the guiding section first enters the anti-rotation sleeve 42. At this time, the guiding teeth on the outer side of the guiding section first enter the anti-rotation grooves, and then the anti-rotation teeth 321 on the outer side of the rotating shaft 32 enter the anti-rotation grooves. This can further improve the smoothness of the fitting connection between the rotating shaft 32 and the anti-rotation sleeve 42.

[0034] The hinge 3 is mainly used to realize the rotational connection between the window sash 2 and the window frame 1. Specifically, the hinge 3 includes a fixed rod 33, a movable rod 34, a second rotating rod 35, a connecting rod 36 and a slider 37. The fixed rod 33 is connected to the window frame 1, and the movable rod 34 is connected to the window sash 2. One end of the first rotating rod 31 is rotatably connected to the fixed rod 33, the rotating shaft 32 is connected to the other end of the first rotating rod 31, and the rotating shaft 32 is rotatably connected to the middle of the movable rod 34. The slider 37 is slidably connected to the fixed rod 33. One end of the second rotating rod 35 is rotatably connected to the slider 37, and the other end of the second rotating rod 35 is rotatably connected to one end of the movable rod 34. One end of the connecting rod 36 is rotatably connected to the end of the second rotating rod 35 where it is rotatably connected to the slider 37, and the other end of the connecting rod 36 is rotatably connected to the middle of the first rotating rod 31. The fixed rod 33, the movable rod 34, the first connecting rod 36 and the second connecting rod 36 form a four-bar linkage 36 structure, which can provide stable connection support for the window sash 2. When the window sash 2 rotates and opens, the movable rod 34 rotates and unfolds relative to the fixed rod 33. At this time, the slider 37 moves relatively closer to the connection point of the first rotating rod 31 on the fixed rod 33. When the window sash 2 rotates and closes, the movable rod 34 rotates and folds relative to the fixed rod 33. At this time, the slider 37 moves relatively farther away from the connection point of the first rotating rod 31 on the fixed rod 33.

[0035] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A casement window, characterized in that: Comprising: Window frame (1); Window sash (2), which is located within the window frame (1). A hinge (3) is provided between the window sash (2) and the window frame (1). The hinge (3) has a first rotating rod (31) that can rotate relative to the window sash (2). A rotating shaft (32) is provided at a position on the first rotating rod (31) where it rotates relative to the window sash (2), and the rotating shaft (32) is inserted upward into the bottom side of the window sash (2). Locking mechanism, including a handle (41), a transmission assembly, and a rotation stop sleeve (42). The handle (41) is rotatably connected to one side of the window sash (2). The rotation stop sleeve (42) is located within the window sash (2) and directly above the rotating shaft (32). The handle (41) is drivingly connected to the rotation stop sleeve (42) through the transmission assembly. The handle (41) can drive the rotation stop sleeve (42) to sleevedownward on the rotating shaft (32) to restrict the rotation of the rotating shaft (32), or drive the rotation stop sleeve (42) to disengage upward from the rotating shaft (32) to release the rotation restriction of the rotating shaft (32).

2. The casement window according to claim 1, wherein: The transmission assembly includes a transmission rack (43) and a transmission rod (44). The handle (41) is rotatably connected to a position inside the window sash (2) and is connected to a transmission gear. The transmission rack (43) is slidably connected to the side of the window sash (2) in the vertical direction. The transmission gear meshes with the transmission rack (43). The transmission rod (44) is slidably connected to the bottom of the window sash (2) in the vertical direction. One end of the transmission rod (44) is connected to the bottom end of the transmission rack (43). The rotation stop sleeve (42) is connected to the bottom end of the transmission rod (44).

3. A casement window according to claim 2, characterized in that: A guide post (21) extending upward is connected to the inner bottom side of the bottom of the window sash (2). A sliding sleeve (441) extending downward is connected to the bottom side of the transmission rod (44). The sliding sleeve (441) is slidably connected to the outside of the guide post (21).

4. A casement window according to claim 3, characterized in that: The window sash (2) is provided with connecting screws, and the connecting screws are tightly connected to the bottom end of the guide post (21).

5. A casement window according to claim 2, characterized in that: A first spring (45) is provided between the inner top side of the bottom of the window sash (2) and the top side of the transmission rod (44). The first spring (45) has a tendency to press down the transmission rod (44) and make the rotation stop sleeve (42) sleevedownward on the outside of the rotating shaft (32).

6. A casement window according to claim 5, wherein: A positioning pin is inserted through the inner top side of the bottom of the window sash (2) and into the first spring (45).

7. A casement window according to claim 2, wherein: An installation groove is provided at the top end of the transmission rack (43). A second spring (46) is provided in the installation groove. The second spring (46) protrudes from the transmission rack (43) and abuts against the inner top side of the top of the window frame (1). The second spring (46) has a tendency to press down the transmission rack (43) to the bottom end of the stroke.

8. A casement window according to claim 1, characterized in that: A plurality of anti-rotation teeth (321) are circumferentially arranged outside the rotating shaft (32). Anti-rotation grooves are respectively arranged at positions on the inner side of the anti-rotation sleeve (42) opposite to the plurality of anti-rotation teeth (321). The plurality of anti-rotation teeth (321) can be respectively connected in cooperation with the plurality of anti-rotation grooves.

9. A casement window according to claim 8, wherein: A guiding section is formed at the top end of the rotating shaft (32). The outer diameter of the guiding section gradually decreases from top to bottom. Guiding teeth are respectively arranged at positions on the outer side of the guiding section opposite to the plurality of anti-rotation teeth (321). The plurality of guiding teeth can respectively enter the plurality of anti-rotation grooves.

10. A casement window according to claim 1, characterized in that: The hinge (3) includes a fixed rod (33), a movable rod (34), a second rotating rod (35), a connecting rod (36) and a slider (37). The fixed rod (33) is connected to the window frame (1). The movable rod (34) is connected to the window sash (2). One end of the first rotating rod (31) is rotatably connected to the fixed rod (33). The rotating shaft (32) is connected to the other end of the first rotating rod (31). The rotating shaft (32) is rotatably connected to the middle of the movable rod (34). The slider (37) is slidably connected to the fixed rod (33). One end of the second rotating rod (35) is rotatably connected to the slider (37). The other end of the second rotating rod (35) is rotatably connected to one end of the movable rod (34). One end of the connecting rod (36) is rotatably connected to the end of the second rotating rod (35) rotatably connected to the slider (37). The other end of the connecting rod (36) is rotatably connected to the middle of the first rotating rod (31).

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