A freely positioned casement window

Abstract

The application relates to a free-positioning casement window, belonging to the technical field of windows, comprising a window frame and a window sash hinged in the window frame, wherein the hinging axis of the window sash is located in the upper part of the internal space of the window frame, and the window frame is characterized in that a hinging shaft is rotationally arranged in the window frame, the window sash is fixedly arranged on the hinging shaft, a worm wheel is sleeved on the hinging shaft, the worm wheel is located in the internal cavity of the window frame, a worm is arranged in the internal cavity of the window frame and engaged with the worm wheel, the worm is parallel to the frame of the window frame, a driving rod is arranged on the axis of the worm, the driving rod extends to the bottom of the window frame and extends out along the bottom of the window frame, the internal frame of the window frame is provided with a supporting rod, the side wall of the window sash is hinged on the supporting rod, the supporting rod is located at the end of the internal frame and is hinged on the window frame, and the casement window further comprises a fixing piece for fixing the supporting rod to slide to any position. The application has the effect of increasing the opening range of the window sash.

Description

Technical Field

[0001] This application relates to the field of window technology, and in particular to a freely positionable casement window. Background Technology

[0002] In architecture, a window is an opening built into a wall or roof to allow light or air to enter a room. Window types generally include sliding windows, casement windows, and fixed windows. Casement windows are windows that are pushed outwards or pulled inwards, including top-hung windows and tilt-and-turn windows. Top-hung windows are opened by pushing them outwards from the bottom. Because top-hung windows open outwards, they do not need to be closed even when it rains, and rainwater generally does not easily enter the room.

[0003] Currently, patent application CN210798678U discloses a top-hung window that is not prone to rain leakage, including a window frame and a window sash. The window sash includes soundproof glass and surround soundproof glass.

[0004] The window sash has a sash frame with an abutment post on the outer wall and a protective frame for inserting the abutment post on the inner wall. The abutment post has a placement groove on its surface and a support rod is rotatably mounted on the inner wall of the placement groove. One end of the placement groove has a limiting plate. When the support rod rotates to a certain angle, the other end of the support rod abuts against the inner cavity of the protective frame, thus supporting the sash to be suspended and fixed.

[0005] However, the opening angle of the window sash is affected by the struts, resulting in a smaller opening range. Summary of the Invention

[0006] To increase the opening range of the window sash, this application provides a freely positioning casement window.

[0007] The free-positioning casement window provided in this application adopts the following technical solution:

[0008] A freely positioning casement window includes a window frame and a window sash hinged within the window frame. The hinge axis of the window sash is located in the upper part of the internal space of the window frame. A hinge shaft is rotatably disposed within the window frame, and the window sash is fixedly disposed on the hinge shaft. A worm gear is sleeved on the hinge shaft and is located within the inner cavity of the window frame. A worm is disposed within the inner cavity of the window frame and meshes with the worm gear. The worm is parallel to the edge of the window frame. A drive rod is disposed on the axis of the worm and extends to the bottom of the window frame and extends outward from the bottom of the window frame. A support rod is disposed on the inner frame of the window frame, and the side wall of the window sash is hinged to the support rod. The support rod slides at its end in the inner frame and is hinged to the window frame. The casement window also includes a fixing member for fixing the support rod to any position.

[0009] Optionally, the drive rod includes a first rod body and a second rod body. The first rod body is coaxially mounted on a worm gear. The second rod body is rotatably mounted inside the window frame with its length direction perpendicular to the length direction of the first rod body and its length direction parallel to the thickness direction of the window frame. The ends of the first rod body and the second rod body that are close to each other are provided with meshing bevel gears. The end of the second rod body is flush with the outer surface of the window frame and faces the interior.

[0010] Optionally, the second rod includes a connecting rod rotatably disposed within the window frame and a slide rod slidably disposed within the connecting rod. The slide rod is coaxially disposed with the connecting rod, and the connecting rod has a first sliding groove for the slide rod to slide in. The cross-section of the first sliding groove is polygonal.

[0011] Optionally, a rotating rod is provided at the end of the sliding rod and the connecting rod. The length direction of the rotating rod is perpendicular to the length direction of the sliding rod, and a connecting groove for accommodating the rotating rod is provided at the end of the connecting rod.

[0012] Optionally, a spring is provided on the connecting rod and located in the first slide groove, with one end of the spring fixedly disposed on the bottom wall of the first slide groove and the other end fixedly disposed on the end of the slide rod.

[0013] Optionally, the vertical frame of the window frame has an elongated notch that communicates with the interior space of the window frame. A slider is slidably mounted on the window frame within the elongated notch. The slider slides along the length of the frame. One end of the support rod is hinged to the surface of the slider facing the window sash, and the other end is hinged to the vertical frame of the window sash facing the window frame. The fixing component includes a fixing rod fixedly mounted within the elongated notch. The slider slides through the fixing rod. The fixing component also includes a fixing strip movably mounted on the fixing rod and a driving component for driving the fixing strip to abut against the inner wall of the slider's sliding hole.

[0014] Optionally, the fixing strip is slidably mounted on the fixing rod, and the sliding direction of the fixing strip is perpendicular to the length direction of the fixing rod. The fixing rod has a second sliding groove for the fixing strip to slide, and the driving member is used to drive the fixing strip to slide out from the second sliding groove and abut against the inner wall of the slider hole.

[0015] Optionally, the fixing strip is hinged to the fixing rod, the hinge axis of the fixing strip is perpendicular to the length direction of the fixing rod, the rotation axis of the fixing strip is close to the end of the fixing rod away from the ground, the fixing rod is provided with a receiving groove for accommodating the fixing strip, and the driving member is used to drive the free end of the fixing strip to rotate in a direction away from the axis of the fixing rod so that the fixing strip abuts against the inner wall of the sliding hole of the slider.

[0016] Optionally, two fixing strips are provided, and the two fixing strips are symmetrically arranged along the axis of the fixing rod, with the line connecting the two fixing strips parallel to the plane of the window frame. The driving component includes a driving block disposed between the two fixing strips. The driving block has a guide surface formed by its inclined surface facing the fixing strip. The guide surface abuts against the fixing strip. The guide surface is used to drive the fixing strips on both sides to separate from each other and abut against the inner wall of the sliding hole of the slider when the driving block slides inward toward the fixing rod.

[0017] Optionally, the window sash is provided with a flange, which is located on the side closer to the outside. The flange is used to fasten the window sash to the window frame when the window sash is closed.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. When the window sash is opened, rotating the drive rod causes the worm gear to rotate, which in turn drives the worm wheel, which in turn drives the window sash to rotate, thus opening the window. The self-locking mechanism of the worm gear and worm wheel fixes the window sash in its rotated position, making operation simple and convenient. Furthermore, the rotation of the worm gear drives the worm wheel, which in turn drives the hinge shaft, causing the window sash to rotate to any angle, thus increasing the opening range. After the window sash is opened, the worm gear resists the weight and wind force of the window sash, which can easily lead to damage to the worm wheel and worm gear. At this point, the support rod and fixing components provide support for the window sash, improving its stability and reducing the possibility of damage to the worm wheel and worm gear.

[0020] 2. The drive rod is located on the interior side of the window frame, making it easy to rotate the drive rod to open the window sash. Compared with pushing the window sash open from the interior, it has the advantages of convenient operation and improved safety.

[0021] 3. The support rod is slidably mounted on the window frame, which facilitates the sliding of the support rod along the window frame during the rotation and opening of the window sash. This reduces the limitation on the opening range of the window sash due to the length of the support rod and further improves the opening range of the window sash. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0023] Figure 2 This is a cross-sectional view of the window frame in Example 1;

[0024] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle;

[0025] Figure 4 yes Figure 2 Enlarged schematic diagram of part B;

[0026] Figure 5 This is a cross-sectional view of the back of the window frame in Embodiment 1;

[0027] Figure 6 This is a schematic diagram of the structure of the fixing rod in Example 1;

[0028] Figure 7 This is a cross-sectional view of the fixing rod in Embodiment 1;

[0029] Figure 8 yes Figure 7 An enlarged schematic diagram of section C;

[0030] Figure 9 yes Figure 7 An enlarged schematic diagram of section D in the middle;

[0031] Figure 10 This is a schematic diagram of the abutment plate in Example 1;

[0032] Figure 11 This is a cross-sectional view of the fixing rod in Embodiment 2;

[0033] Figure 12 yes Figure 11 An enlarged schematic diagram of section E in the middle.

[0034] Explanation of reference numerals in the attached diagram: 1. Window frame; 2. Window sash; 3. Hinge shaft; 4. Worm gear; 5. Worm;

[0035] 6. Drive rod; 61. First rod body; 62. Second rod body; 621. Connecting rod; 622. Slide rod; 63. Bevel gear; 64. First slide groove; 65. Rotating rod; 66. Connecting groove; 67. Spring;

[0036] 7. Support rod;

[0037] 8. Fixing component; 81. Fixing rod; 82. Fixing strip; 83. Driving block; 84. Guide surface;

[0038] 9. Long strip notch; 10. Slider; 11. Second slide groove; 12. Receiving groove; 13. Flanged edge; 14. Abutment plate. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0040] Example 1

[0041] Reference Figure 1 , Figure 2 and Figure 3The freely positioning casement window includes a window frame 1 and a window sash 2 hinged within the window frame 1. The hinge axis of the window sash 2 is located at the upper part of the internal space of the window frame 1. A hinge shaft 3 is rotatably installed inside the window frame 1 and extends out of the window frame 1. The length direction and rotation axis of the hinge shaft 3 are parallel to the length direction of the horizontal side frame of the window frame 1. Two hinge shafts 3 are provided and are located on both sides of the inner frame of the window frame 1. The window sash 2 is fixedly installed on the hinge shaft 3. A worm gear 4 is sleeved on the hinge shaft 3 and is coaxially installed on the hinge shaft 3. The worm gear 4 is located in the inner cavity of the window frame 1. A worm 5 that meshes with the worm gear 4 is provided in the inner cavity of the window frame 1. The worm 5 is parallel to the side frame of the window frame 1. A drive rod 6 is provided on the axis of the worm 5 and extends to the bottom of the window frame 1 and extends out along the bottom of the window frame 1.

[0042] When the window sash 2 is opened, the drive rod 6 is rotated. The rotation of the drive rod 6 drives the worm gear 5 to rotate, the rotation of the worm gear 5 drives the worm wheel 4 to rotate, the rotation of the worm wheel 4 drives the hinge shaft 3 to rotate, and the rotation of the hinge shaft 3 drives the window sash 2 to rotate. The operation is simple and convenient. Moreover, under the self-locking performance of the worm wheel 4 and the worm gear 5, the window sash 2 is fixed at the angle after rotation.

[0043] Reference Figure 3 and Figure 4 In this embodiment, the drive rod 6 includes a first rod 61 and a second rod 62. Both the first rod 61 and the second rod 62 are cylindrical. The first rod 61 is coaxially mounted on the worm gear 5. The second rod 62 is rotatably mounted inside the window frame 1, with its length direction perpendicular to the length direction of the first rod 61 and its length direction parallel to the thickness direction of the window frame 1. The ends of the first rod 61 and the second rod 62 that are close to each other are provided with meshing bevel gears 63. The end of the second rod 62 is flush with the outer surface of the window frame 1 and faces the interior. When the window sash 2 is opened, the second rod 62 is rotated, which drives the bevel gear 63 to rotate. The bevel gear 63 rotates, which drives the first rod 61 to rotate. The first rod 61 rotates, which drives the worm gear 5 to rotate, thereby driving the hinge shaft 3 to rotate and opening the window sash 2.

[0044] Reference Figure 3 and Figure 4In this embodiment, because the second rod 62 is flush with the surface of the window frame 1, the possibility of users accidentally bumping into the second rod 62 is reduced, and the flatness and aesthetics of the window frame 1 are improved. To facilitate the rotation of the second rod 62, the second rod 62 includes a connecting rod 621 rotatably disposed in the window frame 1 and a sliding rod 622 slidably disposed in the connecting rod 621. The bevel gear 63 is coaxially disposed on the connecting rod 621, and the sliding rod 622 is coaxially disposed with the connecting rod 621. The connecting rod 621 has a first sliding groove 64 for the sliding rod 622 to slide, and the cross-section of the first sliding groove 64 is polygonal. When the window sash 2 is opened, the sliding rod 622 is first slid out from the connecting rod 621, and then the sliding rod 622 is rotated. The rotation of the sliding rod 622 drives the connecting rod 621 to rotate, which in turn drives the bevel gear 63 to rotate, thereby opening the window sash 2. The operation is simple and convenient.

[0045] Reference Figure 3 and Figure 4 To facilitate the rotation of the slide rod 622, a rotating rod 65 is provided at the end of the connecting rod 621. The length direction of the rotating rod 65 is perpendicular to the length direction of the slide rod 622. A connecting groove 66 for accommodating the rotating rod 65 is provided at the end of the connecting rod 621. Under the action of the rotating rod 65, it is easy to hold the rotating rod 65 to rotate the slide rod 622, reducing the possibility of the slide rod 622 rotating relative to the palm, thus facilitating the passive rotation of the slide rod 622.

[0046] Reference Figure 3 and Figure 4 To facilitate the insertion of the sliding rod 622 into the connecting rod 621, a spring 67 is installed on the connecting rod 621 within the first sliding groove 64. One end of the spring 67 is fixed to the bottom wall of the first sliding groove 64, and the other end is fixed to the end of the sliding rod 622. After the window sash 2 is opened to a suitable angle, the sliding rod 622 is pulled into the connecting rod 621 by the elastic force of the spring 67, making the operation simple and convenient. At the same time, for infants and young children, the spring 67 provides a certain resistance to pulling the sliding rod 622, which reduces the possibility of infants and young children accidentally opening the window sash 2, thereby improving safety performance.

[0047] Reference Figure 5The inner frame of window frame 1 is provided with a support rod 7. The side wall of window sash 2 is hinged to the support rod 7. The hinge part of the support rod 7 and window sash 2 is located in the upper half of window sash 2. The end of the support rod 7 is slidably connected to the window frame 1. The vertical frame of window frame 1 has an elongated notch 9. The elongated notch 9 faces the interior space of window frame 1 and is connected to the interior space of window frame 1. A slider 10 is slidably provided on window frame 1 and located in the elongated notch 9. The slider 10 slides along the length direction parallel to the frame. One end of the support rod 7 is hinged to the surface of the slider 10 facing window sash 2 and the other end is hinged to the vertical frame of window sash 2 facing window frame 1. The casement window also includes a fixing member 8 for fixing the support rod 7 to slide to any position.

[0048] Reference Figure 6 and Figure 7 The fixing member 8 includes a fixing rod 81 fixedly disposed in the elongated notch 9, the length direction of the fixing rod 81 being parallel to the length direction of the elongated notch 9, the slider 10 slidingly passing through the fixing rod 81, the fixing member 8 also includes a fixing strip 82 movably disposed on the fixing rod 81 and a driving member for driving the fixing strip 82 to abut against the inner wall of the sliding hole of the slider 10;

[0049] Reference Figure 7 , Figure 8 and Figure 9 In this embodiment, the fixing strip 82 is slidably disposed on the fixing rod 81. The sliding direction of the fixing strip 82 is perpendicular to the length direction of the fixing rod 81. The fixing rod 81 is provided with a second sliding groove 11 for the fixing strip 82 to slide. The fixing rod 81 is hollow. The second sliding groove 11 is connected to the internal space of the fixing rod 81. The driving member is used to drive the fixing strip 82 to slide out from the second sliding groove 11 and abut against the inner wall of the sliding hole of the slider 10. There are two fixing strips 82. The two fixing strips 82 are symmetrically arranged along the axis of the fixing rod 81 and the line connecting the two fixing strips 82 is parallel to the plane of the window frame 1. The driving member includes a driving block 83 disposed between the two fixing strips 82. One end of the driving block 83 is located outside the window frame 1. The surface of the driving block 83 facing the fixing strip 82 is inclined to form a guide surface 84. The guide surface 84 abuts against the fixing strip 82. The guide surface 84 is used to drive the fixing strips 82 on both sides to separate and abut against the inner wall of the sliding hole of the slider 10 when the driving block 83 slides inward toward the fixing rod 81.

[0050] When the window sash 2 is opened by rotating under the drive of the worm gear 4 and worm 5, the rotation of the window sash 2 drives the support rod 7 to rotate and causes the slider 10 to slide on the fixed rod 81. When the window sash 2 is opened to the required angle, the drive block 83 is pressed and slides towards the inside of the window frame 1. Under the action of the guide surface 84, the drive block 83 drives the fixing strips 82 on both sides to move in a direction away from the axis of the fixed rod 81, so that the fixing strips 82 abut against the inner wall of the sliding hole of the slider 10, thereby fixing the slider 10 at the above-mentioned position. After the slider 10 is fixed, the angle and position of the support rod 7 are fixed, thereby enabling the support rod 7 to support the window sash 2.

[0051] Reference Figure 10 The push-drive block 83 is inserted into the fixing rod 81, and the push-drive block is flush with the surface of the window frame 1 on the indoor side. An abutment plate 14 is rotatably provided on the surface of the window frame 1. The rotation axis of the abutment plate 14 is perpendicular to the window frame 1. Furthermore, the abutment plate 14 is located above the sliding hole on the window frame 1 for the push-drive block 83 to slide. When the abutment plate 14 is rotated to the suspended state, the abutment plate 14 covers the sliding hole. After the push-drive block 83 drives the fixing bars 82 on both sides to fix the slider 10, the abutment plate 14 rotates downward under the action of gravity, and then covers the sliding hole. The push-drive block 83 abuts against the surface of the abutment plate 14 facing the window frame 1, thereby fixing the push-drive block 83 at the above-mentioned position.

[0052] To facilitate the release of the fixing effect of the fixing strip 82 on the slider 10, a tension spring is provided between the two fixing strips 82. The tension spring is linear. After the driving block 83 moves out from between the two fixing strips 82, the two fixing strips 82 move closer to each other under the action of the tension spring, thereby releasing the fixing effect on the slider 10.

[0053] To improve the waterproof performance of window sash 2, a flange 13 is provided on window sash 2. The flange 13 is located on the side closer to the outside. The flange 13 is used to fasten the window sash 2 to the window frame 1 when the window sash 2 is closed.

[0054] The implementation principle of Example 1 is as follows:

[0055] When window sash 2 is opened, the slide rod 622 is first slid out from the connecting rod 621, and then the slide rod 622 is rotated. The rotation of the slide rod 622 drives the connecting rod 621 to rotate, which in turn drives the bevel gear 63 to rotate. The rotation of the bevel gear 63 drives the first rod body 61 to rotate. The rotation of the first rod body 61 drives the worm gear 5 to rotate. The rotation of the worm gear 5 drives the worm wheel 4 to rotate. The rotation of the worm wheel 4 drives the hinge shaft 3 to rotate, thereby opening window sash 2.

[0056] Simultaneously, during the above process, when the window sash 2 rotates, the rotation of the window sash 2 drives the support rod 7 to rotate and causes the slider 10 to slide on the fixed rod 81. When the window sash 2 is opened to the required angle, the drive block 83 is pressed, and the drive block 83 slides towards the inside of the window frame 1. Under the action of the guide surface 84, the drive block 83 drives the fixing strips 82 on both sides to move in a direction away from the axis of the fixed rod 81, so that the fixing strips 82 abut against the inner wall of the sliding hole of the slider 10, thereby fixing the slider 10 at the above location. After the slider 10 is fixed, the angle and position of the support rod 7 are fixed, thereby allowing the support rod 7 to support the window sash 2. Subsequently, the abutment plate 14 rotates under the action of gravity, covering the sliding hole and fixing the drive block 83 at the above location.

[0057] Example 2

[0058] The difference between Example 2 and Example 1 is that, referring to Figure 11 and Figure 12 The fixing strip 82 is hinged to the fixing rod 81, with the hinge axis of the fixing strip 82 perpendicular to the length direction of the fixing rod 81. The rotation axis of the fixing strip 82 is close to the end of the fixing rod 81 facing away from the ground. The fixing rod 81 has a receiving groove 12 for accommodating the fixing strip 82. The driving member is used to drive the free end of the fixing strip 82 to rotate in a direction away from the axis of the fixing rod 81, so that the fixing strip 82 abuts against the inner wall of the sliding hole of the slider 10. When the driving block 83 is pressed, the driving block 83 enters between the two fixing strips 82 and drives the two... The driving blocks 83 rotate in opposite directions and move out of the receiving groove 12 to fix the slider 10 at the aforementioned location, making the operation simple and convenient. Simultaneously, the two fixing bars 82, after rotation, arrange themselves in a V-shape, improving the fixing effect on the slider 10 and reducing the possibility of the slider 10 accidentally slipping off. Furthermore, under the action of the V-shaped fixing bars 82, the slider 10 has a tendency to slide towards the upper part of the fixing rod 81, increasing the supporting force of the slider 10 on the support rod 7, thereby improving the supporting force on the window sash 2.

[0059] The implementation principle of Example 2 is as follows:

[0060] When the window sash 2 rotates, the rotation of the window sash 2 drives the support rod 7 to rotate and causes the slider 10 to slide on the fixed rod 81. When the window sash 2 is opened to the required angle, when the drive block 83 is pressed, the drive block 83 enters between the two fixed bars 82 and drives the two drive blocks 83 to rotate in opposite directions and move out of the receiving groove 12 to fix the slider 10 at the above-mentioned position. The operation is simple and convenient.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A freely positioned casement window comprising a window frame (1) and a sash (2) hinged in the window frame (1), the axis of the hinge of the sash (2) being located in the upper part of the interior space of the window frame (1), characterized in that: The hinge shaft (3) is arranged in the window frame (1), the sash (2) is fixed on the hinge shaft (3), the worm gear (4) is sleeved on the hinge shaft (3), the worm gear (4) is located in the inner cavity of the window frame (1), the worm gear (4) is engaged with the worm (5) arranged in the inner cavity of the window frame (1), the axis of the worm (5) is parallel to the frame of the window frame (1), the driving rod (6) is arranged on the axis of the worm (5) and extends to the bottom of the window frame (1) and extends out along the bottom of the window frame (1); the inner frame of the window frame (1) is provided with the support rod (7), the side wall of the sash (2) is hinged on the support rod (7), the support rod (7) is located at the end of the inner frame and is hinged on the window frame (1), the fixed part (8) for fixing the support rod (7) to slide to anywhere is further arranged; The frame of the window frame (1) in the vertical state is provided with the long strip-shaped notch (9) which is communicated with the inner space of the window frame (1), the sliding block (10) is arranged on the window frame (1) and in the long strip-shaped notch (9), the sliding block (10) slides along the length direction parallel to the frame, one end of the support rod (7) is hinged on the surface of the sliding block (10) facing the sash (2) and the other end is hinged on the vertical frame of the window frame (1) facing the sash (2); the fixed part (8) comprises the fixed rod (81) fixedly arranged in the long strip-shaped notch (9), the sliding block (10) slides through the fixed rod (81), the fixed part (8) further comprises the fixed strip (82) movably arranged on the fixed rod (81) and the driving part for driving the fixed strip (82) to abut against the inner wall of the sliding hole of the sliding block (10); The fixed strip (82) is arranged on the fixed rod (81) and slides in the direction perpendicular to the length direction of the fixed rod (81), the second sliding groove (11) for the sliding of the fixed strip (82) is arranged on the fixed rod (81), and the driving part is used to drive the fixed strip (82) to slide out of the second sliding groove (11) and abut against the inner wall of the sliding hole of the sliding block (10); Or the fixed strip (82) is hinged on the fixed rod (81), the hinge axis of the fixed strip (82) is perpendicular to the length direction of the fixed rod (81), the rotation axis of the fixed strip (82) is close to the end of the fixed rod (81) away from the ground, the containing groove (12) for containing the fixed strip (82) is arranged on the fixed rod (81), and the driving part is used to drive the free end of the fixed strip (82) to rotate towards the direction away from the axis of the fixed rod (81) so that the fixed strip (82) abuts against the inner wall of the sliding hole of the sliding block (10). The fixing strips (82) are provided with two, the two fixing strips (82) are symmetrically arranged along the axis of the fixing rod (81), and the connecting line between the two fixing strips (82) is parallel to the plane where the window frame (1) is located, the driving member includes a driving block (83) arranged between the two fixing strips (82), the driving block (83) is inclined to form a guide surface (84) on the surface of the fixing strip (82), the guide surface (84) abuts on the fixing strip (82), and the guide surface (84) is used to drive the two fixing strips (82) on the two sides to separate from each other and abut on the inner wall of the sliding hole of the sliding block (10) when the driving block (83) slides towards the fixing rod (81).

2. A free standing casement window according to claim 1 wherein: The driving rod (6) includes a first rod body (61) and a second rod body (62), the first rod body (61) is coaxially arranged on the worm (5), the second rod body (62) is rotationally arranged in the window frame (1) and the length direction of the second rod body (62) is perpendicular to the length direction of the first rod body (61) and parallel to the thickness direction of the window frame (1), the end portions of the first rod body (61) and the second rod body (62) approaching each other are provided with bevel gears (63) meshing with each other, and the end portion of the second rod body (62) is flush with the outer surface of the window frame (1) and faces the indoor.

3. A free standing casement window according to claim 2 wherein: The second rod body (62) includes a connecting rod (621) rotationally arranged in the window frame (1) and a sliding rod (622) slidingly arranged in the connecting rod (621), the sliding rod (622) is coaxially arranged with the connecting rod (621), the bevel gear (63) is arranged on the connecting rod (621), the connecting rod (621) is provided with a first sliding groove (64) for the sliding rod (622) to slide, and the cross section of the first sliding groove (64) is polygonal.

4. A free standing casement window according to claim 3 wherein: The end portion of the connecting rod (621) is provided with a rotating rod (65), the length direction of the rotating rod (65) is perpendicular to the length direction of the sliding rod (622), and the end portion of the connecting rod (621) is provided with a connecting groove (66) for accommodating the rotating rod (65).

5. A free standing casement window according to claim 3 wherein: The connecting rod (621) is provided with a spring (67) in the first sliding groove (64), one end of the spring (67) is fixedly arranged on the bottom wall of the first sliding groove (64), and the other end is fixedly arranged on the end portion of the sliding rod (622).

6. A free standing casement window according to claim 1 wherein: The window sash (2) is provided with a turned edge (13), the turned edge (13) is located on the side close to the outdoor, and the turned edge (13) is used for buckling on the window frame (1) when the window sash (2) is closed.

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