Escape device

Abstract

The invention provides an escape device, and relates to the technical field of escape equipment. The escape device comprises the main window frame, the auxiliary window frame, the window sash and the escape ladder, the escape ladder is adjusted to be in the vertical direction by turning over the auxiliary window frame, frameless glass of the escape ladder and the window sash is automatically unfolded downwards under the action of self gravity, the escape ladder is connected with the escape device on the lower layer of the building, and a vertically-through cage type escape ladder channel is formed. The escape ladder is simple to operate and convenient to use, a continuous and reliable escape channel can be rapidly established, meanwhile, fire rescue workers can rapidly climb up to rescue and extinguish fire according to the escape ladder under the condition that the terrain and the environment are limited, time and labor do not need to be consumed for breaking and dismantling a rescue window, the functions of rescue, fire extinguishment and escape are integrated, and the rescue effect is good. Rescue, fire extinguishment and escape are carried out at the same time, preemption is carried out every minute and every second, the requirements for rapid and efficient rescue and personnel escape are met, and therefore personal safety is better guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of escape equipment, and in particular relates to an escape device. Background Art

[0002] With the acceleration of urbanization, the safe evacuation of personnel and fire rescue work in various building fire accidents face numerous challenges. When a fire occurs, the primary means of escape often relies on vertical escape routes. These routes are limited, and most vertical escape routes are located indoors, easily blocked by thick smoke and flames. Stairs and evacuation corridors are often reduced in width or even blocked due to the haphazard accumulation of various debris. During escape, the sudden surge of people often causes congestion, preventing people from safely evacuating via the stairs. Furthermore, the lack of effective climbing and entry routes for fire rescue vehicles, as well as the limitations and inadequacies of the site environment and existing facilities, often hinder rescue efficiency.

[0003] Traditional fire rescue windows are relatively simple in function, and are mostly fixed or simply opened. They cannot provide a continuous and reliable channel for escape and fire rescue. In an emergency, they are difficult to meet the needs of fast and efficient rescue and escape. Summary of the Invention

[0004] In order to improve the rescue and escape efficiency, the present invention provides an escape device.

[0005] The technical solutions of the present invention are as follows:

[0006] An escape device, comprising:

[0007] A main window frame, the main window frame being used for installation at a window on a wall;

[0008] A secondary window frame, the secondary window frame being reversibly mounted on the main window frame and capable of being reversibly turned toward the outside;

[0009] a window sash rotatably mounted on the secondary window frame;

[0010] An escape ladder is installed on the auxiliary window frame. When the auxiliary window frame is turned toward the outside, the escape ladder is unfolded downward to form an escape passage.

[0011] Furthermore, the escape device also includes a recovery module, which is used to retract the downwardly deployed escape ladder onto the secondary window frame.

[0012] Furthermore, the recovery module includes a storage box and a noose assembly;

[0013] The storage box is arranged on the indoor side of the wall of the main window frame and is close to or located at the lower frame of the main window frame;

[0014] The winch assembly includes a manual winch at least partially disposed inside the storage box, a plurality of steel cables wound around the manual winch, and fairleads disposed inside the storage box and inside the side frame of the auxiliary window frame;

[0015] One end of the steel cable is fixed to a manual winch, and the other end passes through a storage box and a fairlead inside the auxiliary window frame in sequence, passes through a side frame of the auxiliary window frame, passes through the side of the escape ladder from top to bottom, and is fixed to the bottom of the escape ladder.

[0016] Furthermore, the noose assembly further includes a snap-fitting slot provided on the storage box, and a winch handle placed in the snap-fitting slot;

[0017] One end of the winch handle is provided with a polygonal groove, and one end of the manual winch shaft is provided with a polygonal protrusion adapted to the polygonal groove; and / or,

[0018] The recovery module further includes a locking assembly, which includes a toothed disc fixed to the manual winch, a toggle member rotatably connected to the manual winch via a rotating shaft, and a limit member rotatably connected to the toggle member via a rotating shaft;

[0019] One end of the limiting member away from the toggle member is clamped in the teeth on the toothed disc.

[0020] Furthermore, a fixing member is provided on one side of the main window frame located outside the wall, for fixing an escape ladder of another escape device deployed downward from the upper window.

[0021] Furthermore, a slide rail is provided on the inner side of the main window frame, a support arm is provided on the outer side of the auxiliary window frame, a cantilever is provided between the slide rail and the support arm for suspending the auxiliary window frame, and one end of the support arm can move along the slide rail to flip the auxiliary window frame; and / or,

[0022] When the auxiliary window frame is flipped to a horizontal state, the escape ladder can be automatically unfolded downward.

[0023] Furthermore, the escape ladder includes a plurality of main support members, secondary support members, a main frame and a secondary frame;

[0024] The plurality of main frames and sub-frames are alternately arranged from top to bottom, with two adjacent main frames connected by a main support member, and a sub-frame connected to the main frame above it by a sub-support member;

[0025] The secondary frame is arranged on a side of the main frame away from the wall.

[0026] Furthermore, when the escape ladder is deployed downward, the uppermost main frame is connected to the secondary window frame via a main support member, the uppermost secondary frame is connected to the secondary window frame via a secondary support member, and the lowermost portion of the escape ladder comprises two consecutively arranged secondary frames connected via secondary supports; and / or,

[0027] The positions of the main frames corresponding to the connected sub-frames are provided with notches for accommodating the connected sub-frames, and when the escape ladder is folded, two adjacent main frames are in contact; and / or,

[0028] The main support member and the auxiliary support member are both scissor-fork structures.

[0029] Furthermore, the window sash includes a glass track installed on the auxiliary window frame through a rotating wheel, and two frameless glasses arranged on the glass track, and a sealing strip is provided on the side of the two frameless glasses that are close to each other when closed.

[0030] Furthermore, the escape device further comprises a first unlocking key and a second unlocking key provided on the wall, and the auxiliary window frame and the window sash are both limited by electromagnetic latches;

[0031] The first unlocking key is used to control the opening and closing of the electromagnetic latch of the auxiliary window frame and the window sash. The first unlocking key is set on both the indoor side and the outdoor side of the wall. After the auxiliary window frame is flipped over, it is connected to the lower frame of the main window frame.

[0032] The second unlocking key is used to control the switch of the electromagnetic latch of the window sash, and is arranged on the indoor side of the wall. The window sash is a casement window.

[0033] The beneficial effects of the present invention are as follows:

[0034] The escape device of the present invention adjusts the escape ladder to a vertical direction by flipping the auxiliary window frame. The escape ladder automatically unfolds downward under the action of its own gravity, and is connected to the escape device on the next floor of the building to form a cage-type escape ladder passage that runs through the upper and lower floors. The escape device is simple to operate and easy to use, and can quickly establish a continuous and reliable escape passage. At the same time, fire rescue personnel can quickly climb up the escape ladder to carry out rescue and fire extinguishing under conditions of restricted terrain and environment, and there is no need to spend time and effort to break open the rescue window, thereby realizing the integration of rescue, fire extinguishing and escape functions. Rescue, fire extinguishing and escape are carried out simultaneously, seizing every minute and every second, meeting the needs of fast and efficient rescue and escape, and thus better ensuring personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of an escape device in an open state from an outdoor perspective according to an embodiment of the present invention;

[0036] Figure 2This is a schematic structural diagram of an escape device in an embodiment of the present invention in an open state from an indoor perspective;

[0037] Figure 3 This is a schematic structural diagram of an escape device in an unactivated state according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic structural diagram of an escape device in a semi-open state according to an embodiment of the present invention;

[0039] Figure 5 This is a structural diagram of an escape device in a fully opened state according to an embodiment of the present invention;

[0040] Figure 6 This is an embodiment of the present invention Figure 5 A partial enlarged view of point A in the middle;

[0041] Figure 7 2 is a schematic structural diagram of a locking assembly and a noose assembly in an embodiment of the present invention;

[0042] Figure 8 This is a partial structural diagram of a noose assembly and a secondary window frame in an embodiment of the present invention;

[0043] Figure 9 It is a structural diagram of the window sash and the auxiliary window frame in an embodiment of the present invention.

[0044] In the figure: 1. Main window frame; 2. Auxiliary window frame; 3. Window sash; 301. Glass track; 302. Frameless glass; 4. Escape ladder; 401. Main support member; 402. Auxiliary support member; 403. Main frame; 404. Auxiliary frame; 5. Recovery module; 501. Storage box; 502. Noose assembly; 5021. Manual winch; 5022. Steel cable; 5023. Fairlead; 5024. Snap-in groove; 5025. Winch handle; 503. Locking assembly; 5031. Toothed plate; 5032. Toggle member; 5033. Limiting member; 6. Fixed component; 7. Slide rail; 8. Support arm; 9. Cantilever; 10. First unlocking key; 11. Second unlocking key. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0046] Example:

[0047] refer to Figures 1 to 9 This embodiment provides an escape device, including: a main window frame 1, a secondary window frame 2, a window sash 3 and an escape ladder 4.

[0048] The main window frame 1 is used to be installed at a window on a wall and can be made of metal, such as aluminum.

[0049] The auxiliary window frame 2 is flippably mounted on the main window frame 1 and can be flipped toward the outside. The auxiliary window frame 2 can be made of metal, such as aluminum.

[0050] The window sash 3 is rotatably mounted on the auxiliary window frame 2 , for example, the window sash 3 is rotatably mounted on the auxiliary window frame 2 via a rotating shaft or a hinge.

[0051] The escape ladder 4 is mounted on the secondary window frame 2. When the secondary window frame 2 is tilted toward the outside, the escape ladder 4 unfolds downward to form an escape passage. For example, when the secondary window frame 2 is tilted toward the outside, it is in a horizontal or nearly horizontal state. The escape ladder 4 unfolds downward under the action of gravity to form an escape passage.

[0052] By flipping the auxiliary window frame 2, the escape ladder 4 is adjusted to a vertical direction, and the escape ladder 4 automatically unfolds downward under the action of its own gravity. The frameless glass 302 in the window sash 3 can also be set to automatically unfold downward under the action of its own gravity. The escape ladder 4 is connected to the escape device on the next floor of the building to form a cage-type escape ladder 4 channel that runs through the top and bottom. It is simple to operate and easy to use, and can quickly establish a continuous and reliable escape channel. At the same time, fire rescue personnel can quickly climb up the escape ladder 4 to carry out rescue and fire fighting under restricted terrain and environment, and there is no need to spend time and effort to break the rescue window, realizing the integration of rescue, fire fighting and escape functions. Rescue, fire fighting and escape are carried out simultaneously, seizing every minute and every second, realizing the needs of fast and efficient rescue and personnel escape, thereby better ensuring personal safety.

[0053] As a preferred embodiment, the escape device also includes a recovery module 5, which is used to fold the downwardly deployed escape ladder 4 onto the auxiliary window frame 2. After the rescue work is completed, for the undamaged escape device, the escape ladder 4 can be folded by the recovery module 5, and then the auxiliary window frame 2 can be reset to achieve the recovery and multiple reuse of the device.

[0054] The recovery module 5 includes a storage box 501 , a noose assembly 502 and a locking assembly 503 .

[0055] The storage box 501 is arranged on the indoor side of the wall of the main window frame 1 and is close to or located at the lower frame of the main window frame 1. The storage box 501 can be a hollow tubular structure and can be made of aluminum, such as a hollow square tube.

[0056] The noose assembly 502 includes a manual winch 5021 that is at least partially arranged inside the storage box 501, a plurality of steel cables 5022 wound around the manual winch 5021, a cable guide 5023 arranged inside the storage box 501 and inside the side frame of the auxiliary window frame 2, a snap-in groove 5024 arranged on the storage box 501, and a winch handle 5025 placed in the snap-in groove 5024. One end of the winch handle 5025 is provided with a polygonal groove, and one end of the rotating shaft of the manual winch 5021 is provided with a polygonal protrusion that is compatible with the polygonal groove. The cable guide 5023 can be a cylindrical structure, and the cylinder can have a limiting structure, such as a hole or a slit, for the steel cable 5022 to pass through, guiding the steel cable 5022 to move along a preset route when the steel cable 5022 shuttles back and forth.

[0057] When retrieving the escape ladder 4, the winch handle 5025 is removed from the clamping groove 5024, and then the polygonal groove of the winch handle 5025 is clamped on the polygonal protrusion on the manual winch 5021. The winch handle 5025 is turned to wind the steel cable 5022 around the manual winch 5021, so that the other end of the steel cable 5022 is gradually shortened or retracted, thereby realizing the folding of the escape ladder 4. The operation is simple.

[0058] One end of the steel cable 5022 is fixed to the manual winch 5021, and the other end passes through the storage box 501 and the fairlead 5023 inside the auxiliary window frame 2 in sequence, passes through the side frame of the auxiliary window frame 2, passes through the side of the escape ladder 4 from top to bottom, and is fixed to the bottom of the escape ladder 4. The side frame of the auxiliary window frame 2 can be provided with a hole for the steel cable 5022 to pass through.

[0059] The locking assembly 503 includes a toothed disc 5031 fixed to the manual winch 5021, a toggle member 5032 rotatably connected to the manual winch 5021 through a rotating shaft, and a limit member 5033 rotatably connected to the toggle member 5032 through a rotating shaft. The end of the limit member 5033 away from the toggle member 5032 is engaged in the teeth on the toothed disc 5031. The locking assembly 503 can lock the manual winch 5021 when retracting the escape ladder 4, preventing the manual winch 5021 from rotating before the auxiliary window frame 2 returns to its original position during the retraction process, and preventing the folded escape ladder 4 from being deployed again, making it more reliable to use. In addition, when the electromagnetic latch at the auxiliary window frame 2 is damaged due to fire, the locking assembly 503 can temporarily lock the folded escape ladder 4. The locking assembly 503 only needs to lock the manual winch 5021 when retracting the escape ladder 4. Normally, the locking assembly 503 is never in a locked state.

[0060] As a preferred embodiment, a fixing member 6 is provided on one side of the main window frame 1 located outside the wall, which is used to fix the escape ladder 4 of another escape device that is deployed downward from the upper window. In actual use, the deployment height of the escape ladder 4 is set according to the floor height of the building, so that the bottom main frame 403 of the upper escape ladder 4 can just be stuck into the fixing member 6 of the lower escape device, limiting the lower hem of the escape ladder 4 to prevent shaking during climbing, making it safer and more reliable to use.

[0061] As a preferred embodiment, a slide rail 7 is provided on the inner side of the frame of the main window frame 1, and a bracket arm 8 is provided on the outer side of the frame of the secondary window frame 2. A cantilever 9 is provided between the slide rail 7 and the bracket arm 8 for suspending the secondary window frame 2. One end of the bracket arm 8 can move along the slide rail 7 to tilt the secondary window frame 2. The slide rail 7, bracket arm 8 and cantilever 9 cooperate to tilt the secondary window frame 2 at a preset angle when it tilts, while providing support for the escape ladder 4 and for people climbing the escape ladder 4.

[0062] When the auxiliary window frame 2 is flipped to a horizontal state, the escape ladder 4 can be automatically deployed downward without manual operation, which is more conducive to saving escape time.

[0063] As a preferred embodiment, the escape ladder 4 includes several main support members 401, secondary support members 402, main frames 403 and secondary frames 404. The main support members 401 and secondary support members 402 are preferably scissor-fork structures, which can be folded to facilitate the folding of the escape ladder 4.

[0064] Several main frames 403 and secondary frames 404 are arranged alternately from top to bottom. The two adjacent main frames 403 are connected by the main support member 401, and the secondary frame 404 is connected to the main frame 403 adjacent to it above it through the secondary support member 402. The secondary frame 404 is set on the side of the main frame 403 away from the wall. The secondary frame 404 is set between the two adjacent main frames 403, which can reduce the difficulty of climbing and improve the safety of use of the device.

[0065] When the escape ladder 4 is unfolded downward, the top main frame 403 is connected to the secondary window frame 2 through the main support 401, and the top secondary frame 404 is connected to the secondary window frame 2 through the secondary support 402. The bottom of the escape ladder 4 is two continuously arranged secondary frames 404 connected by the secondary support 402, so that the upper escape device is connected to the lower escape device. It is not easy for the upper escape device and the lower escape device to interfere with each other, the climbing difficulty is small, and the safety is higher.

[0066] The position of the main frame 403 corresponding to the connected secondary frame 404 is provided with a gap for accommodating the connected secondary frame 404. After the escape ladder 4 is folded, the two adjacent main frames 403 are in contact. After the escape ladder 4 is folded, the main frame 403 and the secondary frame 404 fit tightly together, which is conducive to reducing the overall volume of the escape device.

[0067] As a preferred embodiment, the window sash 3 includes a glass track 301 installed on the secondary window frame 2 through a rotating wheel, and two frameless glasses 302 arranged on the glass track 301. A sealing strip is provided on the side where the two frameless glasses 302 are close to each other when closed. During daily use, the window sash 3 can be opened and closed freely, so that the escape device takes into account the daily ventilation needs of the building in which it is located.

[0068] As a preferred embodiment, the escape device also includes a first unlocking key 10 and a second unlocking key 11 arranged on the wall. There are two first unlocking keys 10, and the two first unlocking keys 10 are respectively arranged on the indoor side and outdoor side of the wall, so that the escape device can be opened and used from both indoors and outdoors. The auxiliary window frame 2 and the window sash 3 are both limited by electromagnetic latches.

[0069] The first unlocking button 10 is used to control the opening and closing of the electromagnetic latches of the auxiliary window frame 2 and the window sash 3. After the auxiliary window frame 2 is flipped over, it is connected to the lower frame of the main window frame 1. Electromagnetic latches are set above or on both sides of the auxiliary window frame 2 to limit the auxiliary window frame 2. The electromagnetic latches can extend or retract into the main window frame 1. For example, the electromagnetic latches can achieve the limiting function of the auxiliary window frame 2 by extending and release the limiting function of the auxiliary window frame 2 by retracting. Electromagnetic latches are set above or below the window sash 3 to limit the window sash 3. The electromagnetic latches can extend or retract into the auxiliary window frame 2. For example, the electromagnetic latches can achieve the limiting function of the window sash 3 by extending and release the limiting function of the window sash 3 by retracting. The electromagnetic latches of the auxiliary window frame 2 and the window sash 3 can be simultaneously unlocked by the first unlocking button 10. Therefore, the escape device can be deployed through the two first unlocking buttons 10 inside and outside the wall. When a fire occurs, the escape device can be opened from outside the building, and firefighters can also enter the building to carry out rescue work without breaking it, saving escape or rescue time, and can avoid indoor fire scenes to achieve escape or rescue, further improving safety.

[0070] The second unlocking button 11 is used to control the switch of the electromagnetic latch of the window sash 3, and is set on the indoor side of the wall. The window sash 3 is preferably a casement window. The operator can release the locking state of the window sash 3 from the room, thereby opening the window sash 3 to meet the indoor ventilation needs.

[0071] During daily use, the locked state of the window sash 3 is released by the second unlocking key 11, so that the window sash 3 can be opened and closed freely.

[0072] When a fire occurs, the first unlocking button 10 is used to release the locking state of the auxiliary window frame 2 and the window sash 3 indoors or outdoors, and then the top of the auxiliary window frame 2 is flipped toward the outside, so that one end of the cantilever 9 slides along the slide rail 7 and the other end rotates relative to the support arm 8, turning the auxiliary window frame 2 to a horizontal state. At this time, the escape ladder 4 is slowly unfolded downward under the action of its own weight. At the same time, the two frameless glass 302 of the window sash 3 are also automatically opened downward under the action of its own weight. After the escape ladder 4 is fully unfolded, the main frame 403 at the bottom of the escape ladder 4 is stuck in the fixing member 6 of the escape device on the lower floor, forming a cage-type escape passage. Escaping personnel can enter the escape ladder 4 from the main window frame 1, go down the ladder from the upper floors of the building one floor at a time, and after leaving the fire floor, they can re-enter the building from the main window frame 1 on the floor they are on and escape by stairs instead, which speeds up their escape speed. If it is impossible to enter the building, they can directly go down to the ground along the escape device. Rescue personnel can climb up from the escape device of the lowest building to rescue people in the building or carry out fire fighting.

[0073] When retrieving the escape device, the manual winch 5021 is rotated by using the winch handle 5025 to shorten the steel cable 5022 and drive the main frame 403 and the secondary frame 404 to retract. After the main frame 403 and the secondary frame 404 are completely retracted, the manual winch 5021 is locked by the locking assembly 503, and then the secondary window frame 2 is pulled back to its original position.

[0074] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An escape device, characterized in that: include: A main window frame (1), the main window frame (1) being used for being installed at a window of a wall; A secondary window frame (2), the secondary window frame (2) being reversibly mounted on the main window frame (1) and capable of being reversibly turned toward the outside; A window sash (3), the window sash (3) being rotatably mounted on the auxiliary window frame (2); An escape ladder (4) is installed on the auxiliary window frame (2). When the auxiliary window frame (2) is turned toward the outdoors, the escape ladder (4) unfolds downward to form an escape passage.

2. The escape device according to claim 1, characterized in that: The escape device further comprises a recovery module (5), and the recovery module (5) is used to retract the downwardly deployed escape ladder (4) onto the secondary window frame (2).

3. The escape device according to claim 2, characterized in that: The recovery module (5) comprises a storage box (501) and a noose assembly (502); The storage box (501) is arranged on the indoor side of the wall of the main window frame (1) and is close to or located at the lower frame of the main window frame (1); The noose assembly (502) comprises a manual winch (5021) at least partially disposed inside the storage box (501), a plurality of steel cables (5022) wound around the manual winch (5021), and a fairlead (5023) disposed inside the storage box (501) and inside the side frame of the auxiliary window frame (2); One end of the steel cable (5022) is fixed to the manual winch (5021), and the other end is passed through the storage box (501) and the cable guide (5023) inside the auxiliary window frame (2) in sequence, passes through the side frame of the auxiliary window frame (2), passes through the side of the escape ladder (4) from top to bottom, and is fixed to the bottom of the escape ladder (4).

4. The escape device according to claim 3, characterized in that: The noose assembly (502) further comprises a snap-fitting slot (5024) provided on the storage box (501), and a winch handle (5025) placed in the snap-fitting slot (5024); One end of the winch handle (5025) is provided with a polygonal groove, and one end of the rotating shaft of the manual winch (5021) is provided with a polygonal protrusion adapted to the polygonal groove; and / or, The recovery module (5) further comprises a locking assembly (503), wherein the locking assembly (503) comprises a toothed disc (5031) fixed to the manual winch (5021), a toggle member (5032) rotatably connected to the manual winch (5021) via a rotating shaft, and a limit member (5033) rotatably connected to the toggle member (5032) via a rotating shaft; One end of the limiting member (5033) away from the toggle member (5032) is clamped in the teeth on the toothed disc (5031).

5. The escape device according to claim 1, characterized in that: A fixing member (6) is provided on one side of the main window frame (1) located outside the wall, for fixing an escape ladder (4) of another escape device that is deployed downward from the upper window.

6. The escape device according to claim 1, characterized in that: A slide rail (7) is provided on the inner side of the frame of the main window frame (1), a support arm (8) is provided on the outer side of the frame of the auxiliary window frame (2), a cantilever (9) is provided between the slide rail (7) and the support arm (8) for suspending the auxiliary window frame (2), one end of the support arm (8) can move along the slide rail (7) to cause the auxiliary window frame (2) to flip over; and / or, When the secondary window frame (2) is flipped to a horizontal state, the escape ladder (4) can automatically unfold downward.

7. The escape device according to claim 1, characterized in that: The escape ladder (4) comprises a plurality of main support members (401), secondary support members (402), a main frame (403) and a secondary frame (404); The plurality of main frames (403) and secondary frames (404) are alternately arranged from top to bottom, two adjacent main frames (403) are connected via a main support member (401), and a secondary frame (404) is connected to the upper adjacent main frame (403) via a secondary support member (402); The secondary frame (404) is arranged on a side of the main frame (403) away from the wall.

8. The escape device according to claim 7, characterized in that: When the escape ladder (4) is unfolded downward, the uppermost main frame (403) is connected to the secondary window frame (2) via the main support member (401), the uppermost secondary frame (404) is connected to the secondary window frame (2) via the secondary support member (402), and the lowermost portion of the escape ladder (4) comprises two consecutively arranged secondary frames (404) connected via the secondary support member (402); and / or, The main frame (403) is provided with a notch for accommodating the connected secondary frame (404) at a position corresponding to the connected secondary frame (404), and when the escape ladder (4) is folded, two adjacent main frames (403) are in contact; and / or, The main support member (401) and the secondary support member (402) are both scissor-fork structures.

9. The escape device according to claim 1, characterized in that: The window sash (3) comprises a glass track (301) mounted on the auxiliary window frame (2) via a rotating wheel, and two frameless glasses (302) arranged on the glass track (301), wherein a sealing strip is provided on the side of the two frameless glasses (302) that are close to each other when closed.

10. The escape device according to claim 1, characterized in that: The escape device further comprises a first unlocking key (10) and a second unlocking key (11) arranged on the wall, and the auxiliary window frame (2) and the window sash (3) are both limited by electromagnetic latches; The first unlocking key (10) is used to control the opening and closing of the electromagnetic latch of the auxiliary window frame (2) and the window sash (3); the first unlocking key (10) is arranged on both the indoor side and the outdoor side of the wall; the auxiliary window frame (2) is connected to the lower frame of the main window frame (1) after being turned over; The second unlocking key (11) is used to control the switch of the electromagnetic latch of the window sash (3), and is arranged on the indoor side of the wall. The window sash (3) is a casement window.

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