An outward-opening upper suspension system

Abstract

A outward-opening upper hanging system is arranged on a window frame and a window sash, and the window sash is provided with a handle. The outward-opening upper hanging system includes a movable pull rod driven by the handle, and the movable pull rod is slidably mounted on the base, and the base is provided with a positioning assembly and a first connecting rod, and the first connecting rod is provided with a limit groove near one end of the base, and the positioning assembly includes a limit block, and the limit block is provided with a locking part; when the window sash needs to be suspended to the maximum position, the locking part extends out of the base and engages with the limit groove to form a limit connection so that the window sash is in a locked state; the movable pull rod is provided with an unlocking part, and when the window sash needs to be closed, the locking part is driven by the handle to slide in the base, and the unlocking part is pressed against the limit block to form a lever effect to cause the locking part to exit the limit groove, thereby releasing the locked state of the window sash.

Description

Technical Field

[0001] The invention relates to an outward-opening top-hanging system and belongs to the field of window sashes. Background Art

[0002] Top-hung casement windows refer to a style of window found in residential buildings. The window sash opens and closes horizontally, hence the name "casement window." Top-hung casement windows offer advantages such as compact size, excellent sealing, and superior sound insulation, heat preservation, and water-resistance. High-rise office buildings, commercial buildings, hotels, and other public buildings often utilize top-hung casement windows, which provide both ventilation and safety.

[0003] In actual applications, in order to achieve stable opening of the window sash, a positioning device needs to be set to limit the window sash to prevent it from shaking or automatically closing under the action of wind. The current positioning device for outward-opening top-hung windows has the following disadvantages: the existing positioning mechanism is usually composed of multiple independent parts, with a cumbersome structure, and the installation and debugging process is relatively complicated, which is prone to assembly errors and affects the positioning accuracy; some devices require additional operations when unlocking, which is inconvenient to use, and after long-term use, due to the unreasonable design of the frequent friction parts, it is easy to wear and tear, resulting in positioning failure; under the action of strong winds or external forces, some positioning devices may not be able to reliably lock the window sash, posing a safety hazard of the window sash swinging or falling. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide an outward-opening top suspension system.

[0005] An outward-opening top-hanging system is provided on a window frame and a window sash, wherein the window sash is provided with a handle, and the outward-opening top-hanging system comprises a movable pull rod driven by the handle, the movable pull rod being slidably mounted on a base, the base being provided with a positioning assembly and a first connecting rod, the first connecting rod being provided with a limiting groove at one end near the base, the positioning assembly comprising a limiting block, and the limiting block being provided with a locking portion;

[0006] When the window sash needs to be suspended to the maximum position, the locking part extends from the base and engages with the limit groove to form a limit connection so that the window sash is in a locked state; the movable pull rod is provided with an unlocking part, and the locking part is driven by the handle to slide in the base when the window sash needs to be closed. The unlocking part contacts and presses the limit block to form a lever effect to withdraw the locking part from the limit groove, thereby releasing the locked state of the window sash.

[0007] This device integrates functional parts such as the positioning assembly, the first connecting rod, and the movable pull rod on the same base, avoiding the tedious traditional multi-part installation. It not only simplifies the assembly process, but also reduces error accumulation and improves positioning accuracy and reliability. The integrated design of the base ensures that the installation position of the positioning mechanism is fixed and the reference is unified; the limit slot and the limit block are reliably connected. During debugging, it is only necessary to simply adjust the handle pulling stroke without the need for complex torque or clearance calibration, which greatly saves on-site construction and maintenance time. At the maximum opening position, the locking part extends through the limit block and firmly snaps into the limit slot. Under the action of wind load or external force, it can always ensure that the window sash is in a stable suspended state, eliminating the risk of accidental swinging or falling, and ensuring safety in use to the greatest extent. Due to its compact structure and easy adjustment, this positioning device can be flexibly applied to various types of outward-opening top-hung casement windows, especially for high-rise office buildings, commercial buildings, hotels and other architectural scenes with high requirements for sealing, sound insulation and windproof performance.

[0008] Preferably, the base is provided with a mounting groove for accommodating the limit block, and the limit block is provided with a reset groove. The limit block is rotatably installed in the mounting groove by a fixing pin passing through the reset groove. The fixing pin is provided with a torsion spring located in the reset groove, which is used to elastically drive the limit block and the movable pull rod to unlock. The reset groove on the limit block cooperates with the fixing pin and the torsion spring, so that the limit block can automatically reset to the locked position after being unlocked, without the need for manual reset or additional operation, further improving the convenience of use and response speed. The torsion spring continuously applies an elastic preload force to the limit block, ensuring that the limit block is tightly attached to the mounting groove in the unlocked state, avoiding displacement of the limit block due to vibration or wind, thereby ensuring that the limit block can be accurately engaged in the limit groove each time it is opened and closed. The coordinated design of the reset groove, the mounting groove and the fixing pin torsion spring can realize the elastic reset function without the need for an additional reset spring seat or a complex linkage mechanism, which not only maintains the overall compactness of the device, but also helps to reduce production and assembly costs.

[0009] Furthermore, a pressing portion for cooperating with the unlocking portion of the movable pull rod is provided on the rear side of the reset groove, and a fixing groove is provided at the bottom of the pressing portion that is engaged with one end of the torsion spring. The fixing groove is L-shaped and matches the shape of the torsion spring, and the other end of the torsion spring abuts against the bottom of the installation groove. The pressing portion cooperates with the unlocking portion of the movable pull rod so that the elastic force of the torsion spring acts directly on the pressing portion through the fixing groove, thereby generating a clear and controllable lever displacement when pressed, ensuring one-time and accurate disengagement from the limit groove, and avoiding incomplete unlocking or jamming due to excess shaking. The fixing groove adopts an L-shaped interlocking structure that is the same shape as the end of the torsion spring, which firmly locks the torsion spring at the bottom of the pressing portion, effectively preventing swinging or eccentricity, ensuring that the spring is always in the optimal pre-tightened position, and enhancing the stability of the device during repeated operation. The pressing portion, fixing groove, reset groove and installation groove are rationally integrated into the integrated structure of the base without the need for additional support parts. This not only maintains the light and thin design of the device, but also further reduces material and production costs.

[0010] Furthermore, the pressing portion includes a pressing surface that is provided in an arc-shaped protrusion and inclined surfaces provided on both sides of the pressing surface. The unlocking portion is provided in a protruding manner at the bottom of the movable pull rod, and the cross-section of the unlocking portion is in the shape of an inverted trapezoid. The inclined surfaces on both sides of the pressing surface guide the unlocking portion into the center of the pressing portion like ramps, so that the unlocking force of the movable pull rod is concentratedly transmitted along a predetermined direction, avoiding jamming caused by lateral deviation or eccentric loading. During the pressing process, the wider upper bottom of the inverted trapezoidal cross-section of the unlocking portion first contacts the inclined surfaces on both sides, and is then squeezed onto the pressing surface, producing a self-centering effect, ensuring that the locking portion evenly disengages from the limit groove and exits stably.

[0011] Preferably, a locking hole is provided at the bottom of the base, and the locking portion passes through the locking hole and is connected to the limiting groove. The limiting groove is in the shape of an arc-shaped groove, and the locking portion is cylindrical and matches the limiting groove. The geometric fit between the cylindrical locking portion and the arc groove allows the locking portion to automatically align at the end of the stroke and smoothly insert into the limiting groove. When unlocked, it can also be smoothly withdrawn along the same trajectory, making the operation more reliable and free of jamming. The locking portion is a cylinder that matches the arc-shaped limiting groove. After passing through the locking hole at the bottom of the base, it can achieve a combined locking of surface contact and line contact, ensuring extremely high resistance to lateral displacement at all opening positions.

[0012] Furthermore, the limiting groove has an opening, the width of the limiting groove is greater than the width of the locking part, one side of the opening is inclined toward the base, and the locking hole is in the shape of an oblong hole. The width of the limiting groove is greater than the diameter of the cylindrical locking part, and the opening side adopts an inclined surface design inclined toward the base, so that the locking part does not need to be strictly aligned at the end of the stroke and can be self-guided into the limiting groove, greatly reducing the requirements for dimensional accuracy during assembly and on-site installation. The locking hole adopts an oblong hole structure, which provides the locking part with elastic movement space along the length of the hole when the temperature, wind force or slight deformation of the window sash are different, ensuring that the locking part can always smoothly enter and exit the limiting groove without generating excessive stress.

[0013] Preferably, the base is provided with a sliding groove, within which a sliding block is slidably mounted. The sliding block is fixedly connected to the first connecting rod via a fixing pin extending out of the sliding groove, and the limiting groove is provided at one end proximal to the sliding groove. The sliding groove and the sliding block cooperate to form a linear guide, ensuring that the movable pull rod moves smoothly along a predetermined trajectory during unlocking and locking operations. The sliding groove, sliding block, first connecting rod, and limiting groove are arranged in sections on the same base, eliminating the need for additional mounting brackets or links, thereby achieving a higher degree of modular integration.

[0014] Furthermore, a second connecting rod is rotatably mounted on the base, the other end of which is rotatably mounted on the first connecting rod. By adjusting the hinge points between the second connecting rod, the base, and the first connecting rod, the angle and travel range of the locking portion can be flexibly set to accommodate the maximum opening angle and locking requirements of window sashes of different specifications. When the window sash approaches its maximum open position, the second connecting rod and the first connecting rod form a nearly collinear mechanical configuration, creating a self-locking effect, reducing reliance on torsion springs and friction elements, and improving overall stability.

[0015] Preferably, the base is provided with a chute, within which the movable rod is slidably mounted, and a fixed block is provided on the inner wall of the base to restrict the vertical movement of the movable rod. The fixed block restricts the movable rod's vertical freedom, limiting its movement to the horizontal direction along the chute. After vertical movement is restricted, the movable rod remains centered in the chute. The fixed block is integrated with the chute, eliminating the need for additional guides or adjustment devices. The rod is automatically centered upon insertion into the chute, eliminating the need for tedious height calibration and enabling quick assembly.

[0016] Preferably, the other end of the movable pull rod extends out of the base and is fixedly mounted on a first fixing seat, the first fixing seat is used to be fixed on the window sash, and the other end of the first connecting rod is rotatably mounted on a second fixing seat, the second fixing seat is used to be fixed on the window frame.

[0017] The beneficial effects of the present invention are as follows: This device integrates functional parts such as the positioning assembly, the first connecting rod and the movable pull rod on the same base, avoiding the tedious traditional multi-part scattered installation. It not only simplifies the assembly process, but also reduces error accumulation and improves positioning accuracy and reliability. The integrated design of the base makes the installation position of the positioning mechanism fixed and the reference unified; the clamping fit between the limit slot and the limit block is reliable. During debugging, it is only necessary to simply adjust the handle pulling stroke without the need for complex torque or gap calibration, which greatly saves on-site construction and maintenance time. The locking part extends through the limit block at the maximum opening position and firmly snaps into the limit slot. Under the action of wind load or external force, it can always ensure that the window sash is in a stable suspended state, eliminating the risk of accidental swinging or falling, and ensuring safety in use to the greatest extent. Due to its compact structure and easy adjustment, this positioning device can be flexibly applied to various types of outward-opening top-hung casement windows, and is particularly suitable for high-rise office buildings, commercial buildings, hotels and other architectural scenes with high requirements for sealing, sound insulation and windproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a rear view of the present invention;

[0021] Figure 3 yes Figure 2 A magnified view of the details at center A;

[0022] Figure 4 is a cross-sectional view of the present invention;

[0023] Figure 5 for Figure 4 A magnified view of the detail at point B in the middle;

[0024] Figure 6 Schematic diagram of the limit block structure;

[0025] Figure 7 It is the rear view of the limit block;

[0026] In the figure, 1. base; 11. mounting groove; 12. locking hole; 13. sliding groove; 14. sliding block; 15. sliding pin; 16. sliding groove; 17. fixed block; 2. first connecting rod; 21. limiting groove; 22. opening; 3. limiting block; 31. locking part; 32. reset groove; 33. fixing pin; 34. torsion spring; 35. pressing part; 36. fixing groove; 37. pressing surface; 38. inclined surface; 4. movable pull rod; 41. unlocking part; 42. second connecting rod; 5. first fixed seat; 6. second fixed seat. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0028] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0029] The terms "upper," "lower," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side" used herein are merely references to the directions or positions in the accompanying drawings. These terms are intended to illustrate and facilitate understanding of the present invention and are not intended to limit the scope of protection of the present invention.

[0030] like Figure 1-7FIG. 1 is an embodiment of an outward-opening top-hanging system of the present invention, which is arranged on a window frame and a window sash, wherein the window sash is provided with a handle. The outward-opening top-hanging system includes a movable pull rod 4 driven by the handle, and the movable pull rod 4 is slidably mounted on a base 1. The base 1 is provided with a positioning assembly and a first connecting rod 2. The first connecting rod 2 is provided with a limiting groove 21 at one end close to the base 1. The positioning assembly includes a limiting block 3, and the limiting block 3 is provided with a locking portion 31.

[0031] When the window sash needs to be suspended to the maximum position, the locking portion 31 extends out of the base 1 and engages with the limiting groove 21 to form a limiting connection so that the window sash is in a locked state; the movable pull rod 4 is provided with an unlocking portion 41, and the locking portion 31 is driven by the handle to slide in the base 1 when the window sash needs to be closed. The unlocking portion 41 contacts and presses the limiting block 3 to form a lever effect to withdraw the locking portion 31 from the limiting groove 21, thereby releasing the locked state of the window sash.

[0032] This device integrates functional parts such as the positioning assembly, the first connecting rod 2, and the movable pull rod 4 on the same base 1, avoiding the tedious traditional multi-part discrete installation. This not only simplifies the assembly process, but also reduces error accumulation, improving positioning accuracy and reliability. The integrated design of the base 1 ensures that the installation position of the positioning mechanism is fixed and the reference is unified; the limit slot 21 and the limit block 3 are reliably connected. During debugging, only the handle pulling stroke needs to be simply adjusted, without the need for complex torque or clearance calibration, which greatly saves on-site construction and maintenance time. The locking portion 31 extends through the limit block 3 at the maximum opening position and firmly snaps into the limit slot 21. Under wind loads or external forces, it can always ensure that the window sash is in a stable suspended state, eliminating the risk of accidental swinging or falling, and ensuring safety in use to the greatest extent. Due to its compact structure and easy adjustment, this positioning device can be flexibly applied to various types of outward-opening top-hung casement windows, and is particularly suitable for high-rise office buildings, commercial buildings, hotels, and other architectural scenes that require high sealing, sound insulation, and windproof performance.

[0033] The base 1 is provided with a mounting groove 11 for accommodating the limit block 3. The limit block 3 is provided with a reset groove 32. The limit block is rotatably mounted in the mounting groove 11 by a fixing pin 33 passing through the reset groove 32. The fixing pin 33 is sleeved with a torsion spring 34 located in the reset groove 32, which is used to elastically drive the limit block 3 and the movable pull rod 4 to unlock. The reset groove 32 on the limit block 3 cooperates with the fixing pin 33 and the torsion spring 34, so that the limit block 3 can automatically reset to the locked position after being unlocked, without the need for manual reset or additional operation, further improving the convenience of use and response speed. The torsion spring 34 continuously applies an elastic preload to the limit block 3, ensuring that the limit block 3 is tightly attached to the mounting groove 11 in the unlocked state, avoiding displacement of the limit block 3 due to vibration or wind, thereby ensuring that each opening and closing can be accurately engaged in the limit groove 21. The coordinated design of the reset groove 32, the mounting groove 11, the fixing pin 33 and the torsion spring 34 can realize the elastic reset function without adding an additional reset spring seat or a complex linkage mechanism, which not only maintains the overall compactness of the device but also helps to reduce production and assembly costs.

[0034] A pressing portion 35 is provided on the rear side of the reset groove 32 for engaging with the unlocking portion 41 of the movable pull rod 4. A fixing groove 36 is provided at the bottom of the pressing portion 35 for engaging with one end of the torsion spring 34. The fixing groove 36 is L-shaped and matches the shape of the torsion spring 34. The other end of the torsion spring 34 abuts the bottom of the mounting groove 11. The pressing portion 35 cooperates with the unlocking portion 41 of the movable pull rod 4, so that the elastic force of the torsion spring 34 acts directly on the pressing portion 35 through the fixing groove 36, thereby generating a clear and controllable lever displacement when pressed, ensuring one-time and precise disengagement from the limit groove 21 and avoiding incomplete unlocking or jamming due to excessive shaking. The fixing groove 36 adopts an L-shaped interlocking structure that is the same shape as the end of the torsion spring 34, firmly locking the torsion spring 34 at the bottom of the pressing portion 35, effectively preventing swaying or eccentricity, ensuring that the spring is always in the optimal preloaded position, and enhancing the stability of the device during repeated operation. The pressing portion 35 , the fixing groove 36 , the reset groove 32 and the mounting groove 11 are rationally integrated into the integrated structure of the base 1 , without the need for additional supporting parts. This not only maintains the light and thin design of the device, but also further reduces material and production costs.

[0035] The pressing portion 35 includes a protruding arc-shaped pressing surface 37 and inclined surfaces 38 on either side of the pressing surface 37. The unlocking portion 41 protrudes from the bottom of the movable rod 4, and the cross-section of the unlocking portion 41 is an inverted trapezoid. The inclined surfaces 38 on either side of the pressing surface 37 act like ramps to guide the unlocking portion 41 into the center of the pressing portion 35, concentrating the unlocking force of the movable rod 4 in a predetermined direction and preventing jamming caused by lateral deviation or eccentric loading. During the pressing process, the wider upper base of the unlocking portion 41 first contacts the inclined surfaces on both sides, and then presses against the pressing surface 37, creating a self-centering effect and ensuring that the locking portion 31 evenly disengages from the retaining groove 21 and exits stably.

[0036] The base 1 is provided with a locking hole 12 at the bottom, and the locking portion 31 passes through the locking hole 12 and is connected to the limiting groove 21. The limiting groove 21 is in the shape of an arc-shaped groove, and the locking portion 31 is cylindrical and matches the limiting groove 21. The geometric fit between the cylindrical locking portion 31 and the arc groove allows the locking portion 31 to automatically center at the end of the stroke and smoothly insert into the limiting groove 21. When unlocked, it can also be smoothly withdrawn along the same trajectory, making the operation more reliable and free of jamming. The locking portion 31 is a cylinder that matches the arc-shaped limiting groove 21. After passing through the locking hole 12 at the bottom of the base 1, it can achieve a combined locking of surface contact and line contact, ensuring extremely high resistance to lateral displacement at all opening positions.

[0037] In the embodiment of the present application, unlike the above-mentioned embodiment, the limiting groove 21 has an opening 22, the width of the limiting groove 21 is greater than the width of the locking portion 31, one side of the opening 22 is inclined in the direction of the base 1, and the locking hole 12 is in the shape of an oblong hole. The width of the limiting groove 21 is greater than the diameter of the cylindrical locking portion 31, and the side of the opening 22 adopts an inclined surface design inclined in the direction of the base 1, so that the locking portion 31 does not need to be strictly aligned at the end of the stroke and can be self-introduced into the limiting groove 21, which greatly reduces the requirements for dimensional accuracy during assembly and on-site installation. The locking hole 12 adopts an oblong hole structure, which provides the locking portion 31 with elastic movement space along the length of the hole when the temperature, wind force or window sash are slightly deformed, ensuring that the locking portion 31 can always smoothly enter and exit the limiting groove 21 without generating excessive stress.

[0038] The base 1 is provided with a sliding groove 13, within which a sliding block 14 is slidably mounted. The sliding block 14 extends out of the sliding groove 13 and is fixedly connected to the first connecting rod 2 via a fixing pin 33. The limiting groove 21 is provided at one end near the sliding groove 13. The sliding groove 13 and the sliding block 14 cooperate to form a linear guide, ensuring that the movable pull rod 4 always moves smoothly along a predetermined trajectory during unlocking and locking operations. The sliding groove 13, the sliding block 14, the first connecting rod 2, and the limiting groove 21 are arranged in sections on the same base 1, eliminating the need for additional mounting brackets or links, achieving a higher degree of modular integration.

[0039] A second connecting rod 42 is rotatably mounted on the base 1, with its other end rotatably mounted on the first connecting rod 2. By adjusting the hinge points between the second connecting rod 42, the base 1, and the first connecting rod 2, the angle and travel range of the locking portion 31 can be flexibly adjusted to accommodate the maximum opening angle and locking requirements of window sashes of varying sizes. When the window sash approaches its maximum open position, the second connecting rod 42 and the first connecting rod 2 form a nearly collinear mechanical configuration, creating a self-locking effect, reducing reliance on the torsion spring 34 and friction element, and improving overall stability.

[0040] The base 1 is provided with a chute 16, within which the movable rod 4 is slidably mounted. A fixed block 17 is provided on the inner wall of the base 1 to limit the vertical movement of the movable rod 4. The fixed block 17 restricts the vertical freedom of the movable rod 4, limiting its horizontal movement along the chute 16. After vertical movement is restricted, the movable rod 4 always remains centered in the chute 16. The fixed block 17 is an integrated design with the chute 16, eliminating the need for additional guides or adjustment devices. Once the rod is inserted into the chute 16, it automatically centers, eliminating the need for tedious height calibration and enabling quick assembly.

[0041] The other end of the movable pull rod 4 extends out of the base 1 and is fixedly mounted on the first fixing seat 5, which is used to be fixed on the window sash. The other end of the first connecting rod 2 is rotatably mounted on the second fixing seat 6, which is used to be fixed on the window frame.

[0042] The working principle of this device is:

[0043] The user pulls the handle on the window sash inward or outward, driving the movable rod to move linearly along the base. When the window sash is suspended to its maximum position, the locking portion of the limit block, under the action of its own weight and the force of the torsion spring, snaps into the limit slot of the first connecting rod, achieving the positioning function. To unlock, the handle is rotated approximately 25 degrees, and the inverted trapezoidal unlocking portion on the movable rod moves to the inclined surface of the limit block and presses it down. The inverted trapezoidal unlocking portion presses to the high point of the curved pressing surface, and the locking portion of the limit block lifts and separates from the notch in the long connecting rod, unlocking the window sash and pulling it back.

[0044] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

[0045] Although the present invention has been described with reference to several specific embodiments, it should be understood that the invention is not limited to the specific embodiments disclosed, and the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An outward-opening top-hung system, provided on a window frame and a window sash, wherein the window sash is provided with a handle, characterized in that: The outward-opening upper hanging system includes a movable pull rod driven by a handle, and the movable pull rod is slidably installed on the base. The base is provided with a positioning assembly and a first connecting rod, and the first connecting rod is provided with a limit groove near one end of the base. The positioning assembly includes a limit block, and the limit block is provided with a locking portion; when the window sash needs to be suspended to the maximum position, the locking portion extends out of the base and engages with the limit groove to form a limit connection so that the window sash is in a locked state; the movable pull rod is provided with an unlocking portion, and when the window sash needs to be closed, the locking portion is driven by the handle to slide in the base, and the unlocking portion is pressed against the limit block to form a lever effect to withdraw the locking portion from the limit groove, thereby releasing the locked state of the window sash.

2. The outward-opening top suspension system according to claim 1, characterized in that: The base is provided with an installation groove for accommodating the limit block, and the limit block is provided with a reset groove. The limit block is rotatably installed in the installation groove through a fixing pin passing through the reset groove. The fixing pin is sleeved with a torsion spring located in the reset groove, which is used to unlock the limit block and the movable pull rod by elastically driving the limit block.

3. The outward-opening top suspension system according to claim 2, characterized in that: A pressing portion for cooperating with the unlocking portion of the movable pull rod is provided on the rear side of the reset groove, and a fixing groove for engaging with one end of the torsion spring is provided at the bottom of the pressing portion. The fixing groove is L-shaped to match the shape of the torsion spring, and the other end of the torsion spring abuts against the bottom of the installation groove.

4. The outward-opening top suspension system according to claim 3, characterized in that: The pressing portion includes a pressing surface protruding in an arc shape and inclined surfaces arranged on both sides of the pressing surface. The unlocking portion is protruding at the bottom of the movable pull rod, and the cross section of the unlocking portion is in an inverted trapezoidal shape.

5. The outward-opening top suspension system according to claim 1, characterized in that: A locking hole is provided at the bottom of the base, and the locking portion passes through the locking hole and is limitedly connected to the limiting groove. The limiting groove is in the shape of an arc groove, and the locking portion is cylindrical and matches the limiting groove.

6. The outward-opening top suspension system according to claim 5, characterized in that: The limiting groove has an opening, the width of the limiting groove is greater than the width of the locking portion, one side of the opening is inclined toward the base, and the locking hole is in the shape of an oblong hole.

7. The outward-opening top suspension system according to claim 1, characterized in that: The base is provided with a sliding groove, in which a sliding block is slidably installed. The sliding block extends out of the sliding groove through a sliding pin and is fixedly connected to the first connecting rod so that the first connecting rod can rotate relative to the base. The limiting groove is provided at one end close to the sliding groove.

8. The outward-opening top suspension system according to claim 7, characterized in that: A second connecting rod is rotatably mounted on the base, and the other end of the second connecting rod is rotatably mounted on the first connecting rod.

9. The outward-opening top suspension system according to claim 1, characterized in that: A sliding groove is provided in the base, and the movable pull rod is slidably installed in the sliding groove. A fixed block for limiting the vertical movement of the movable pull rod is provided on the inner wall of the base.

10. The outward-opening top suspension system according to claim 1, characterized in that: The other end of the movable pull rod extends out of the base and is fixedly mounted on a first fixing seat, which is used to be fixed on the window sash. The other end of the first connecting rod is rotatably mounted on a second fixing seat, which is used to be fixed on the window frame.

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