Electromagnetic suction fireproof curtain capable of being installed on window

Abstract

The application discloses a window-mounted electromagnetic suction fireproof roller shutter, which comprises a shutter combination unit and a cover control unit, and an adjusting mechanism is mounted on the outside of the cover control unit; the shutter combination unit comprises a plurality of main cover assemblies, a plurality of auxiliary cover assemblies and two electromagnets which are fixedly connected with second counterweights at two ends; an electromagnetic controller and a central controller are mounted in the cover control unit; the electromagnetic controller is connected with the electromagnets when power is on; and the central controller is used for controlling the electromagnetic controller to be powered off in case of fire. Inorganic curtain cloth is used as fireproof material, the first counterweight, the second counterweight and the electromagnets realize gravity falling, and compared with a motor, the application is more economical and reliable; under the condition of ensuring the stability of wind resistance and hot air resistance, the application prevents the generation of longitudinal fire overflow of the window and realizes the separation of longitudinal fireproof partition; the application is convenient to install, has good reliability, occupies small space, and therefore, the application can be applied to the fireproof separation of some small spaces besides windows.

Description

Technical Field

[0001] This invention belongs to the field of fireproof roller shutters, and particularly relates to an electromagnetic fireproof roller shutter that can be installed on windows. Background Technology

[0002] With increasing emphasis on fire safety, fire-resistant roller shutters are being used more and more widely in various places such as large shopping malls, supermarkets, warehouses, office buildings, exhibition halls, and residential communities. Fire-resistant roller shutters offer a easier and more convenient way to separate fire zones compared to firewalls. With the continuous development of materials technology, fire-resistant roller shutters are available in steel, inorganic fabric, and inorganic super-grade fire-resistant materials. Common fire-resistant roller shutters typically include pulleys, a rotating shaft, guide rails, a fire-resistant curtain, a motor, and a control system. The control device lowers the fire-resistant curtain pulleys along the guide rails, thus creating a separation. This type of fire-resistant roller shutter can meet the needs of most application scenarios.

[0003] However, fireproof roller shutters are mainly driven by electric motors, which inevitably results in a large size, making them unsuitable for use in small or narrow areas. Furthermore, the electric motors may malfunction in the complex environment of a fire scene. Therefore, there is an urgent need for an electromagnetic fireproof roller shutter that can be installed on windows to solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems in the prior art and to provide an electromagnetic fireproof roller shutter that can be installed on windows.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] An electromagnetic fireproof roller shutter that can be installed on windows includes a roller shutter assembly unit and a mounting system installed on the window.

[0007] The roller blind assembly unit includes housing control units at both ends, with adjustment mechanisms installed on the outside of the housing control units. The roller blind assembly unit comprises:

[0008] Several main housing components are distributed at intervals along a straight line. Inside each main housing component is a first freely falling roller shutter, and the bottom of the first roller shutter is provided with a first counterweight.

[0009] Several sub-shell assemblies are distributed at intervals along a straight line. A main shell assembly is installed between two adjacent sub-shell assemblies. A free-falling second roller blind is installed inside the sub-shell assembly. A second counterweight connected to the first counterweight is provided at the bottom of the second roller blind.

[0010] Two electromagnets are fixedly connected to the second counterweights at both ends;

[0011] The housing control unit contains an electromagnetic controller and a central controller. The electromagnetic controller is connected to the electromagnet when energized, and the central controller is used to cut off the power to the electromagnetic controller in case of a fire.

[0012] Furthermore, the main housing assembly includes:

[0013] The main cover includes a first horizontal plate and first side plates symmetrically arranged on both sides of the first horizontal plate. The bottom of the first side plate is provided with a first bottom plate, the end of the first bottom plate is provided with a first inclined plate, the end of the first inclined plate is provided with a first clamping protrusion, and the port of the first horizontal plate and the first side plate is provided with a first positioning protrusion. The surface of the first positioning protrusion is evenly distributed with first positioning holes.

[0014] The main winding rod is distributed inside the main casing, with first irregularly shaped insertion holes symmetrically provided at both ends, and a weight reduction through hole provided between the two first irregularly shaped insertion holes;

[0015] The first irregularly shaped insertion rod is fixedly connected to the first irregularly shaped insertion hole.

[0016] Furthermore, the secondary housing assembly includes:

[0017] The secondary cover includes a second horizontal plate and second side plates symmetrically arranged on both sides of the second horizontal plate. The bottom of the second side plate is provided with a second bottom plate, the end of the second bottom plate is provided with a second inclined plate, the end of the second inclined plate is provided with a second clamping protrusion, and the port of the second horizontal plate and the second side plate is provided with a second positioning protrusion that cooperates with the first positioning protrusion. The surface of the second positioning protrusion is evenly distributed with second positioning holes.

[0018] The positioning support includes a positioning top plate that is fixedly connected to the second horizontal plate, and a positioning retaining ring is connected to the bottom of the positioning top plate by a positioning connecting strip;

[0019] The auxiliary coil rod is fixedly connected to the positioning ring, and its two ends are symmetrically provided with second irregular insertion holes that cooperate with the first irregular insertion rod.

[0020] Furthermore, the first clamping protrusion is evenly distributed with first balls on its side;

[0021] The second clamping convex plate has second balls evenly distributed on its side.

[0022] Furthermore, the second counterweight is provided with symmetrical positioning connection holes at both ends, and the electromagnet is provided with a positioning connection post at one end that cooperates with the positioning connection hole.

[0023] Furthermore, the housing control unit includes:

[0024] The control housing includes a third horizontal plate and third side plates symmetrically arranged on both sides of the third horizontal plate. A third bottom plate is provided at the bottom of the third side plate, and a third inclined plate is provided at the end of the third bottom plate. A supporting bottom plate is provided between the ends of the two third inclined plates. An electromagnetic controller is installed on the supporting bottom plate. A third positioning protrusion is provided at the port of the third horizontal plate and the third side plate, which cooperates with the second positioning protrusion. The surface of the third positioning protrusion is evenly distributed with third positioning holes. The surface of the third horizontal plate is provided with two first adjustment limit holes.

[0025] The knob has a second irregularly shaped insert rod on its inner side that mates with the second irregularly shaped insertion hole.

[0026] Furthermore, a smoke detector is installed on the outside of the housing control unit to generate an electrical signal that is fed back to the central controller in the event of a fire.

[0027] Furthermore, the housing control unit also includes a sealing plate, which is connected to the control housing port via a snap-fit.

[0028] Furthermore, the regulatory body includes:

[0029] The adjustment base includes an adjustment platform and a fixed base connected to each other. The fixed base has a fixed connection hole on its surface. The adjustment platform has a set of limiting slots evenly distributed along the arc direction on its surface. The adjustment platform also has a second adjustment limiting hole on its surface.

[0030] The adjustable movable base includes a movable adjusting plate that is connected to the third horizontal plate. The surface of the movable adjusting plate is provided with two first waist-shaped grooves corresponding to the first adjusting limit holes. A first adjusting limit bolt that mates with the first adjusting limit holes is installed in the first waist-shaped groove. The outer end of the movable adjusting plate is provided with an arc-shaped snap-fit ​​plate that mates with the adjusting base. The surface of the arc-shaped snap-fit ​​plate is evenly distributed with snap-fit ​​limiting protrusions that mate with the limiting snap-fit ​​grooves along the arc direction. The surface of the arc-shaped snap-fit ​​plate is also provided with an arc-shaped long groove that mates with the second adjusting limit hole. A second adjusting limit bolt that mates with the second adjusting limit hole is installed in the arc-shaped long groove.

[0031] Furthermore, the first and second counterweights are connected by magnetic force.

[0032] The beneficial effects of this invention are:

[0033] This invention uses inorganic curtain fabric as the fireproof material for the first and second roller blinds, and high-density first and second counterweights and electromagnets to achieve gravity-based descent, which is more economical and reliable than electric motors. While ensuring stability against wind and hot airflow, it prevents longitudinal fire overflow from windows, thus achieving longitudinal fire compartmentation. It is easy to install, has good reliability, and occupies little space. Therefore, in addition to windows, it can also be applied to fire compartmentation in some small spaces.

[0034] The staggered connection of several secondary and primary housing components allows for flexible selection of the appropriate quantity based on actual installation conditions, accommodating installation needs of varying widths and broadening its applicability. The first counterweight at the bottom of the first roller blind and the second counterweight at the bottom of the second roller blind can fall freely and quickly after the electromagnet disengages from the electromagnetic controller. The primary and secondary roller rods are connected by a first irregularly shaped insert, effectively reducing the gap between them and achieving effective fire and smoke prevention. A knob design allows the second irregularly shaped insert to rotate both the primary and secondary roller rods simultaneously, enabling manual rewinding of the first and second roller blinds for convenient future inspection and maintenance. The different positions of the limiting slot and the locking protrusion allow for adjustment of any support angle. The first adjusting limit hole and the first waist-shaped groove provide a locking mechanism for extending and retracting the adjusting seat, ultimately allowing for arbitrary adjustment of the falling position of the first and second roller blinds according to actual installation requirements, making it suitable for various on-site installation environments. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is a partial structural schematic diagram of the present invention;

[0038] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0039] Figure 4 This is a partial structural schematic diagram of the present invention;

[0040] Figure 5 This is a partial exploded view of the structure of the present invention;

[0041] Figure 6 This is a partial exploded view of the structure of the present invention;

[0042] Figure 7 This is a partial structural schematic diagram of the present invention;

[0043] Figure 8 This is a partial structural schematic diagram of the present invention;

[0044] Figure 9 This is a partial exploded view of the structure of the present invention. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0047] like Figure 1-9 The illustrated electromagnetic fireproof roller shutter, which can be installed on a window, includes a roller shutter assembly unit and housing control units 3 installed at both ends of the roller shutter assembly unit. An adjustment mechanism 4 is installed on the outside of the housing control units 3. The roller shutter assembly unit includes:

[0048] Several main housing components 2 are distributed at intervals along a straight line. A first roller shutter 6 that falls freely is installed inside the main housing components 2. A first counterweight 61 is provided at the bottom of the first roller shutter 6.

[0049] Several sub-shell assemblies 1 are distributed at intervals along a straight line. A main shell assembly 2 is installed between two adjacent sub-shell assemblies 1. A free-falling second roller blind 5 is installed inside the sub-shell assembly 1. The bottom end of the second roller blind 5 is provided with a second counterweight 51 connected to the first counterweight 61.

[0050] Two electromagnets 7 are fixedly connected to the second counterweights 51 at both ends;

[0051] The housing control unit 3 is equipped with an electromagnetic controller 34 and a central controller. The electromagnetic controller 34 is connected to the electromagnet 7 when energized, and the central controller is used to control the electromagnetic controller 34 to cut off power in case of fire.

[0052] like Figure 2 and Figure 3 As shown, the main housing assembly 2 includes:

[0053] The main cover 21 includes a first horizontal plate 211 and first side plates 212 symmetrically arranged on both sides of the first horizontal plate 211. The bottom of the first side plate 212 is provided with a first bottom plate 213, the end of the first bottom plate 213 is provided with a first inclined plate 214, the end of the first inclined plate 214 is provided with a first clamping protrusion 215, and the port of the first horizontal plate 211 and the first side plate 212 is provided with a first positioning protrusion 217. The surface of the first positioning protrusion 217 is evenly distributed with first positioning holes 218.

[0054] The main winding rod 22 is located inside the main cover 21, with first irregularly shaped insertion holes 221 symmetrically provided at both ends, and a weight-reducing through hole 222 provided between the two first irregularly shaped insertion holes 221.

[0055] The first irregularly shaped insertion rod 23 is fixedly connected to the first irregularly shaped insertion hole 221.

[0056] like Figure 4 and Figure 5 As shown, the secondary housing assembly 1 includes:

[0057] The secondary cover 11 includes a second horizontal plate 111 and second side plates 112 symmetrically arranged on both sides of the second horizontal plate 111. The bottom of the second side plate 112 is provided with a second bottom plate 113, the end of the second bottom plate 113 is provided with a second inclined plate 114, the end of the second inclined plate 114 is provided with a second clamping protrusion 115, and the port of the second horizontal plate 111 and the second side plate 112 is provided with a second positioning protrusion 117 that cooperates with the first positioning protrusion 217. The surface of the second positioning protrusion 117 is evenly distributed with second positioning holes 118.

[0058] The positioning support 12 includes a positioning top plate 123 fixedly connected to the second horizontal plate 111, and a positioning retaining ring 121 is connected to the bottom of the positioning top plate 123 through a positioning connecting strip 122;

[0059] The auxiliary winding rod 13 is fixedly connected to the positioning ring 121, and has symmetrical second irregular insertion holes 131 at both ends that cooperate with the first irregular insertion rod 23; a bearing can be installed between the positioning ring 121 and the auxiliary winding rod 13.

[0060] To ensure that the first roller blind 6 and the second roller blind 5 can fall freely and smoothly, first balls 216 can be evenly distributed on the side of the first clamping convex plate 215; second balls 116 can be evenly distributed on the side of the second clamping convex plate 115.

[0061] like Figure 6 As shown, the second counterweight 51 has symmetrical positioning connection holes 52 at both ends, and the electromagnet 7 has a positioning connection post 71 at one end that cooperates with the positioning connection hole 52; the first counterweight 61 and the second counterweight 51 can be connected by magnetic force.

[0062] like Figure 7 As shown, the housing control unit 3 includes:

[0063] The control housing 31 includes a third horizontal plate 311 and third side plates 312 symmetrically arranged on both sides of the third horizontal plate 311. The bottom of the third side plate 312 is provided with a third base plate 313, and the end of the third base plate 313 is provided with a third inclined plate 314. A support base plate 315 is provided between the ends of the two third inclined plates 314. An electromagnetic controller 34 is installed on the support base plate 315. The port of the third horizontal plate 311 and the third side plate 312 is provided with a third positioning protrusion 317 that cooperates with the second positioning protrusion 117. The surface of the third positioning protrusion 317 is evenly distributed with third positioning holes 318. The surface of the third horizontal plate 311 is provided with two first adjustment limit holes 316.

[0064] The knob 33 has a second irregularly shaped insert 331 on its inner side that mates with the second irregularly shaped insert hole 131.

[0065] A smoke detector is installed on the outside of the housing control unit 3 to generate an electrical signal that is fed back to the central controller in the event of a fire.

[0066] To facilitate rotational adjustment, rotational limiting protrusions 332 are evenly distributed around the knob 33.

[0067] To protect the internal structure, the housing control unit 3 also includes a sealing plate 32, which is connected to the control housing 31 port by a snap-fit.

[0068] like Figure 8 and Figure 9 As shown, the adjustment mechanism 4 includes:

[0069] The adjustment base 41 includes an adjustment base 411 and a fixed base plate 414 connected to each other. The fixed base plate 414 has a fixed connection hole 415 on its surface. The adjustment base 411 has a limiting groove 412 evenly distributed along the arc direction on its surface. The adjustment base 411 also has a second adjustment limiting hole 413 on its surface.

[0070] The adjustable movable base 42 includes a movable adjusting plate 424 that is connected to the third horizontal plate 311. The movable adjusting plate 424 has two first waist-shaped grooves 425 corresponding to the first adjusting limit holes 316 on its surface. A first adjusting limit bolt 44 that mates with the first adjusting limit holes 316 is installed in the first waist-shaped grooves 425. The outer end of the movable adjusting plate 424 has an arc-shaped snap-fit ​​plate 421 that mates with the adjusting base 411. The surface of the arc-shaped snap-fit ​​plate 421 has snap-fit ​​limit protrusions 422 that mate with the limit snap-fit ​​grooves 412 evenly distributed along the arc direction. The surface of the arc-shaped snap-fit ​​plate 421 also has an arc-shaped long groove 423 that mates with the second adjusting limit hole 413. A second adjusting limit bolt 43 that mates with the second adjusting limit hole 413 is installed in the arc-shaped long groove 423.

[0071] In practical use, inorganic curtain fabric is used as the fireproof material for the first roller blind 6 and the second roller blind 5. The first counterweight 61 and the second counterweight 51 with higher density and the electromagnet 7 achieve gravity-based descent, which is more economical and reliable than electric motors. Under the condition of ensuring stability against wind and hot airflow, it prevents the generation of longitudinal fire overflow in the window and realizes the separation of longitudinal fire compartments. It is easy to install, has good reliability, and occupies little space. Therefore, in addition to windows, it can also be used for fire separation in some small spaces.

[0072] By interlacing several secondary cover assemblies 1 and several main cover assemblies 2, the corresponding quantity can be freely selected according to the actual installation situation, which can be used to meet the installation needs of different widths and has a wider range of applications; the first counterweight 61 at the bottom of the first roller blind 6 and the second counterweight 51 at the bottom of the second roller blind 5 can fall freely and quickly after the electromagnet 7 is disengaged from the electromagnetic controller 34; the main roller rod 22 and the secondary roller rod 13 are connected by the first irregularly shaped insert 23, which can effectively reduce the gap between the first roller blind 6 and the second roller blind 5, and achieve effective fire prevention and smoke prevention; through the design of the knob 33 The second irregularly shaped insert rod 331 drives the main roller rod 22 and the auxiliary roller rod 13 to rotate simultaneously, allowing the first roller blind 6 and the second roller blind 5 to be manually rolled back, facilitating later inspection and maintenance. By cooperating with the limiting slot 412 and the locking limiting protrusion 422 at different positions, the support angle can be adjusted arbitrarily. By fixing the first adjusting limiting hole 316 with the first waist-shaped groove 425, the adjusting moving seat 42 can be extended and retracted, thus ultimately achieving arbitrary adjustment of the falling position of the first roller blind 6 and the second roller blind 5 according to the actual installation position requirements, which is fully applicable to the on-site installation environment.

[0073] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An electromagnetic fireproof roller shutter that can be installed in a window, characterized in that: The roller blind assembly unit includes a roller blind assembly unit and a housing control unit (3) installed at both ends of the roller blind assembly unit. An adjustment mechanism (4) is installed on the outside of the housing control unit (3). The roller blind assembly unit includes: Several main housing components (2) are distributed at intervals along a straight line. A first roller shutter (6) that falls freely is installed inside the main housing components (2). A first counterweight (61) is provided at the bottom of the first roller shutter (6). Several sub-shell assemblies (1) are distributed at intervals along a straight line. A main shell assembly (2) is installed between two adjacent sub-shell assemblies (1). A free-falling second roller blind (5) is installed inside the sub-shell assembly (1). A second counterweight (51) connected to the first counterweight (61) is provided at the bottom of the second roller blind (5). Two electromagnets (7) are fixedly connected to the second counterweights (51) at both ends; The housing control unit (3) is equipped with an electromagnetic controller (34) and a central controller. The electromagnetic controller (34) is used to connect to the electromagnet (7) when energized, and the central controller is used to control the electromagnetic controller (34) to cut off power in case of fire. The main housing assembly (2) includes: The main cover (21) includes a first horizontal plate (211) and first side plates (212) symmetrically arranged on both sides of the first horizontal plate (211). The bottom of the first side plate (212) is provided with a first bottom plate (213), the end of the first bottom plate (213) is provided with a first inclined plate (214), the end of the first inclined plate (214) is provided with a first clamping protrusion (215), and the port of the first horizontal plate (211) and the first side plate (212) is provided with a first positioning protrusion (217). The surface of the first positioning protrusion (217) is evenly distributed with first positioning holes (218). The main winding rod (22) is located inside the main casing (21), with first irregularly shaped insertion holes (221) symmetrically provided at both ends, and a weight-reducing through hole (222) provided between the two first irregularly shaped insertion holes (221). The first irregularly shaped insertion rod (23) is fixedly connected to the first irregularly shaped insertion hole (221); The secondary housing assembly (1) includes: The secondary cover (11) includes a second horizontal plate (111) and second side plates (112) symmetrically arranged on both sides of the second horizontal plate (111). The bottom of the second side plate (112) is provided with a second bottom plate (113), the end of the second bottom plate (113) is provided with a second inclined plate (114), the end of the second inclined plate (114) is provided with a second clamping protrusion (115), and the port of the second horizontal plate (111) and the second side plate (112) is provided with a second positioning protrusion (117) that cooperates with the first positioning protrusion (217). The surface of the second positioning protrusion (117) is evenly distributed with second positioning holes (118). The positioning support (12) includes a positioning top plate (123) fixedly connected to the second horizontal plate (111), and a positioning retaining ring (121) is connected to the bottom of the positioning top plate (123) through a positioning connecting strip (122). The auxiliary coil rod (13) is fixedly connected to the positioning ring (121), and the two ends are symmetrically provided with second irregular insertion holes (131) that cooperate with the first irregular insertion rod (23). First ball bearings (216) are evenly distributed on the side of the first clamping protrusion (215); The second clamping protrusion (115) has second balls (116) evenly distributed on its side. The second counterweight (51) has symmetrical positioning connection holes (52) at both ends, and the electromagnet (7) has a positioning connection post (71) at one end that matches the positioning connection hole (52). The housing control unit (3) includes: The control housing (31) includes a third horizontal plate (311) and third side plates (312) symmetrically arranged on both sides of the third horizontal plate (311). The bottom of the third side plate (312) is provided with a third base plate (313), and the end of the third base plate (313) is provided with a third inclined plate (314). A support base plate (315) is provided between the ends of the two third inclined plates (314). An electromagnetic controller (34) is installed on the support base plate (315). The port of the third horizontal plate (311) and the third side plate (312) is provided with a third positioning protrusion (317) that cooperates with the second positioning protrusion (117). The surface of the third positioning protrusion (317) is evenly distributed with third positioning holes (318). The surface of the third horizontal plate (311) is provided with two first adjustment limit holes (316). The knob (33) has a second irregular insertion rod (331) on its inner side that matches the second irregular insertion hole (131).

2. The electromagnetic fireproof roller shutter that can be installed in a window according to claim 1, characterized in that: A smoke detector is installed on the outside of the housing control unit (3) to generate an electrical signal to feed back to the central controller in case of fire.

3. The electromagnetic fireproof roller shutter that can be installed in a window according to claim 1, characterized in that: The housing control unit (3) also includes a sealing plate (32), which is connected to the control housing (31) port by a snap fastener.

4. The electromagnetic fireproof roller shutter that can be installed in a window according to claim 1, characterized in that: The regulating mechanism (4) includes: The adjustment base (41) includes an adjustment platform (411) and a fixed base plate (414) connected to each other. The fixed base plate (414) has a fixed connection hole (415) on its surface. The adjustment platform (411) has a limiting groove (412) evenly distributed along the arc direction on its surface. The adjustment platform (411) also has a second adjustment limiting hole (413) on its surface. The adjustable movable base (42) includes a movable adjusting plate (424) that is connected to the third horizontal plate (311). The movable adjusting plate (424) has two first waist-shaped grooves (425) corresponding to the first adjusting limit hole (316) on its surface. The first adjusting limit bolt (44) that is connected to the first adjusting limit hole (316) is installed in the first waist-shaped groove (425). The outer end of the movable adjusting plate (424) is provided with an arc-shaped snap-fit ​​plate (421) that is connected to the adjusting base (411). The surface of the arc-shaped snap-fit ​​plate (421) is evenly distributed with snap-fit ​​limit protrusions (422) that are connected to the limit snap-fit ​​groove (412) along the arc direction. The surface of the arc-shaped snap-fit ​​plate (421) is also provided with an arc-shaped long groove (423) that is connected to the second adjusting limit hole (413). The second adjusting limit bolt (43) that is connected to the second adjusting limit hole (413) is installed in the arc-shaped long groove (423).

5. The electromagnetic fireproof roller shutter that can be installed in a window according to claim 4, characterized in that: The first counterweight (61) and the second counterweight (51) are connected by magnetic force.

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