A 90° opening fire window based on a linear drive cam indexing mechanism

Abstract

This application relates to a 90° opening fire window based on a linear drive cam rotation mechanism, belonging to the field of building fire protection equipment technology. It solves the problems of low opening and closing efficiency and unreasonable structure affecting operational efficiency in existing fire windows. Specifically, it includes: a window sash unit, which is a frame structure that can rotate 90° inside the window frame to enable the opening and closing of the fire window; the window sash unit has an indoor side and an outdoor side arranged opposite to each other; and a fire passage located between the indoor side and the outdoor side; wherein the indoor side is flush with and closed to the building's interior facade, and the outdoor side is flush with and closed to the building's exterior facade; it also includes a rotating unit located between the window sash unit and the window frame; so that after the fire window is opened 90°, the fire passage connects the building's indoor and outdoor spaces.

Description

Technical Field

[0001] This application belongs to the field of building fire protection equipment technology, and specifically relates to a 90° opening fire window based on a linear drive cam indexing mechanism. Background Technology

[0002] Currently, the fire rescue windows commonly used in buildings are mostly casement or sliding structures. As a key passage for emergency evacuation and fire rescue, they have significant shortcomings in design and function: First, the opening and closing mechanism is complex, requiring multiple unlocking and sliding operations, resulting in low operational efficiency in emergency situations and seriously affecting the timeliness of escape and rescue; Second, the structural layout is unreasonable. Casement windows occupy a large space when opened, while sliding windows are prone to track malfunctions, hindering the efficiency of rescue passage; Third, there is a lack of effective self-locking devices, making them prone to unexpected opening and closing under external vibrations, wind loads, and other disturbances, making it difficult to guarantee the reliability of daily sealing performance and the opening state in emergency situations; Fourth, there is a contradiction between sealing and insulation performance and the need for rapid opening, making it difficult to achieve a balance between functionality and emergency preparedness.

[0003] Therefore, how to provide a dedicated fire rescue window with one-button quick opening and closing function, automatic locking mechanism for opening and closing position, and both structural stability and excellent sealing performance has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a 90° opening fire window based on a linear drive cam indexing mechanism to solve the problems of insufficient opening and closing speed, inadequate rescue passage efficiency, and insufficient daily sealing performance of fire windows in the prior art.

[0005] The objective of this invention is mainly achieved through the following technical solutions: A 90° opening fire-fighting window based on a linear drive cam indexing mechanism, comprising a window frame, characterized in that it includes: The window sash unit is a frame structure that can be rotated 90° inside the window frame to enable the opening and closing of the fire window. The window sash unit has an indoor side and an outdoor side that are arranged opposite to each other, as well as a fire passage between the indoor side and the outdoor side. The indoor side is flush with and enclosed to the interior facade of the building, and the outdoor side is flush with and enclosed to the exterior facade of the building. It also includes a rotating unit, which is disposed between the window sash unit and the window frame, so that the fire escape can connect the indoor and outdoor spaces of the building after the fire window is opened to 90°.

[0006] Furthermore, the rotating unit is configured with two sets of cam indexing mechanisms, which are respectively located at the top and bottom of the window sash unit. Each cam indexing mechanism is provided with a base and a cam rotating component. The base is installed on the window frame, and the cam rotating component is fixedly connected to the window sash unit. The base is provided with a linear guide rail and a rotary track. The base circle portion of the cam rotating component is movably mounted on the linear track, and the cam rotating component is provided with a first connecting member. The cam rotating component is movably connected to the rotary track through the first connecting member, so that the cam rotating component can move along the linear guide rail and rotate along the rotary track at the same time.

[0007] Furthermore, the rotating track is a circular arc track; The rotating track includes a main circular arc segment, a first locking arc, and a second locking arc. The center of the main circular arc segment coincides with the geometric center of the window sash unit. The first locking arc and the second locking arc are respectively located at both ends of the main circular arc segment, and the line connecting the center of the first locking arc and the center of the main circular arc segment is perpendicular to the line connecting the center of the second locking arc and the center of the main circular arc segment. When the first connector is located at the first locking arc, the window sash unit fills the window frame; when the first connector is located at the second locking arc, the window sash unit is perpendicular to the window frame; when the first connector is located at the main arc segment, the window sash unit rotates relative to the window frame.

[0008] Furthermore, the cam indexing mechanism also includes a second connecting member, which is provided with a rotating shaft. The rotating shaft is connected to the center of the base circle of the cam rotating member, so that the cam rotating member can rotate relative to the second connecting member with the rotating shaft as the center. The second connector slides onto the linear guide rail.

[0009] Furthermore, the second connecting member also includes a sliding part, a rotating seat, and a support seat. The rotating seat is mounted on the linear guide rail and fixedly connected to the sliding part, which slides in contact with the linear guide rail. The support is fixedly connected to the cam rotating component, the rotating shaft is fixedly disposed on the rotating component, and the support has a mounting hole, which is rotatably mounted on the rotating shaft.

[0010] Furthermore, the present invention also includes: a linkage pin, which simultaneously passes through and connects the cam shifting mechanism connectors located at the top and bottom of the window sash unit, so that the two sets of cam rotating parts rotate synchronously; The surface of the linkage pin is covered with wear-resistant metal to enhance its wear resistance.

[0011] Furthermore, the present invention also includes: an operation limiting device, which is installed on the indoor side of the window sash unit and welded to the linkage pin, so as to realize the operation of the linkage pin by pushing and pulling the operation limiting device; The operating limit device is provided with anti-slip texture.

[0012] Furthermore, the window sash unit uses a lightweight metal panel, and the interior side of the window sash unit is provided with a finishing layer and a fireproof layer in sequence from the interior direction to the exterior direction; The window sash unit has a decorative layer, an insulation layer, and a waterproof layer arranged sequentially on the outdoor side from the outdoor direction to the indoor direction.

[0013] Furthermore, a sealing mounting groove is provided on the inner side of the window frame, and the sealing mounting groove is filled with a high-temperature resistant sealing strip. The window sash unit is provided with sealing protrusions at corresponding positions to the window frame to ensure a sealing effect when the fire window is closed.

[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects: 1. The operation is efficient and convenient. It does not require a multi-step unlocking process and can automatically complete the continuous actions of unlocking, 90° rotation and final locking, which significantly shortens the opening and closing time. It is suitable for emergency rescue scenarios and effectively improves rescue efficiency.

[0015] 2. Reliable and stable locking: Geometric self-locking is achieved by relying on the locking arc segment of the rotating track. It has reliable locking capability in both fully closed and fully open states. It has excellent wind pressure and vibration resistance, which can prevent accidental opening and closing, and ensure the safety of daily use and the stability of the rescue passage.

[0016] 3. Smooth and stable operation: The window sash opens and closes smoothly and effortlessly, without jamming or abnormal noise; the upper and lower core rotation mechanisms are symmetrically arranged, so that the window sash is subjected to uniform force, preventing structural deformation or damage, thereby extending the service life of the mechanism.

[0017] 4. Comprehensive and coordinated performance: The window sash unit integrates heat preservation, waterproofing and decoration functions. When closed, it achieves tight sealing through the locking mechanism, effectively reconciling the performance contradiction between quick opening and sealing and heat preservation, and combining emergency functions with daily practical needs.

[0018] 5. Reversible mechanism for easy maintenance: The cam indexing mechanism is reversible, allowing professionals to easily perform reset operations. The overall structure is simple, the parts are highly interchangeable, and it is easy to maintain and repair later, which helps to reduce the total life cycle cost. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the fire-fighting window sash unit and cam rotation mechanism according to a preferred embodiment of the present invention.

[0021] Figure 2 A partial view of the cam indexing mechanism installed on the bottom plate of the window sash unit according to a preferred embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of a preferred embodiment of the cam indexing mechanism of the present invention.

[0023] Figure 4 This is a top view of a preferred embodiment of the cam indexing mechanism of the present invention.

[0024] Figure 5 This is a schematic diagram of the support seat of the cam indexing mechanism according to a preferred embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures: 1. Window sash unit; 101. Indoor side; 102. Outdoor side; 103. Fire escape route; 2. Cam indexing mechanism; 201. Base; 202. Cam rotating component; 203. Linear guide rail; 204. Rotating track; 205. First connecting component; 206. Second connecting component; 2061. Rotating shaft; 2062. Sliding part; 2063. Rotating seat; 2064. Support seat; 207. Main arc segment; 208. First locking arc; 209. Second locking arc Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two sets of consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0027] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0028] For descriptive purposes, this disclosure may use spatial relative terms such as “top,” “bottom,” “below,” “under,” “under,” “below,” “above,” “above,” “higher,” etc., which are relative to components, to describe the relationship between one component and another (other) component as shown in the accompanying drawings.

[0029] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0030] A specific embodiment of the present invention provides a 90° opening fire-fighting window based on a linear drive cam indexing mechanism, specifically comprising: The window frame, in this invention, is mainly used in scenarios involving emergency escape and fire rescue passage construction in buildings. The window frame can be assembled from lightweight metals such as aluminum alloy profiles to form a quadrilateral frame structure. Depending on the thickness of the building wall, the window frame can be set as a single unit when the wall thickness is relatively thin, and a quadrilateral frame can be set in both the exterior and interior directions to form a window space when the wall thickness is relatively thick. In a preferred embodiment of this invention, the window frame is constructed by an enclosing structure consisting of an interior side, an exterior side, a top surface, and a bottom surface to form a window space. The components of the window frame are made of aluminum alloy profiles with an external dimension of 1200mm × 800mm (length × height) and a thickness of 2mm. In this embodiment, a vertical edge is provided on one side of the frame to ensure the overall vertical accuracy of the window frame.

[0031] Furthermore, the window frame is fixedly connected to the building wall via embedded parts or chemical anchors to ensure the overall structural stability and adaptability to the installation requirements of various building exterior walls. In this preferred embodiment, four sets of chemical anchors are fixedly connected to the building exterior wall. A sealing strip installation groove is provided on the inner side of the frame for assembling high-temperature resistant sealing strips.

[0032] In a preferred embodiment of the present invention, a window sash unit 1 is further included, wherein the window sash unit 1 is disposed inside the window frame to enable the opening and closing of the fire window, and the window sash unit 1 has an indoor side and an outdoor side disposed opposite to each other. The window sash unit is a frame structure that can be rotated 90° inside the window frame to enable the opening and closing of the fire window. The window sash unit has an indoor side and an outdoor side that are arranged opposite to each other; and a fire passage is provided between the indoor side and the outdoor side. The indoor side is flush with and enclosed to the interior facade of the building, and the outdoor side is flush with and enclosed to the exterior facade of the building. It also includes a rotating unit, which is disposed between the window sash unit and the window frame, so that the fire escape can connect the indoor and outdoor spaces of the building after the fire window is opened to 90°.

[0033] In this embodiment, the window sash unit 1 adopts a lightweight metal panel that matches the inner contour frame of the window frame. The panel thickness is 1.5 mm. In this embodiment, the window sash unit 1 is simultaneously hinged and fixed to the top and bottom surfaces of the window frame through two sets of upper and lower cam rotation mechanisms 2, so that the window sash unit 1 can realize the opening and closing of the fire window by relative rotation inside the window frame unit, while ensuring the structural stability during the opening and closing process.

[0034] Furthermore, the window sash unit 1 is similar to the window frame, and is assembled from the indoor side, the outdoor side, the top plate of the window sash, and the bottom plate of the window sash. The top plate and the bottom plate of the window sash are provided with mounting slots for installing the cam rotation mechanism 2 and matching the outer contour of the cam rotating component 202. The cam rotating component 202 in the cam rotation mechanism 2 is installed to realize the synchronous rotation of the cam rotating component 202 and the window sash unit 1.

[0035] When no emergency passage is required, the interior side of the window sash unit is flush with and closed to the interior facade of the building, and the exterior side is flush with and closed to the exterior facade of the building, thus sealing the fire-fighting window; in the event of a fire, the window sash unit can be rotated 90° by rotating the unit, so that the fire passage of the window sash unit connects the interior and exterior spaces of the building.

[0036] Furthermore, the connection between the window sash unit 1 and the window frame is mainly achieved by the cam shifting mechanism 2. The top plate of the window sash is fixedly installed on the top surface of the window frame via the cam shifting mechanism 2, and the bottom plate of the window sash is fixedly installed on the bottom surface of the window frame via the cam shifting mechanism 2. When the fire window is closed, the interior side of the window sash unit 1 is tightly fitted to the interior side of the window frame, and the exterior side of the window sash unit 1 is tightly fitted to the exterior side of the window frame. When the fire window is open, the window sash unit 1 rotates via the cam shifting mechanism 2 and separates from the corresponding window frame. At this time, the direction line of the window sash unit 1 and the direction line of the window frame have an angle or are even perpendicular to each other. The rotation of the window sash unit 1 relative to the window frame is achieved by the cam shifting mechanism 2.

[0037] In a preferred embodiment of the present invention, a rotating unit is further included, disposed between the window sash unit and the window frame, so that the fire escape can connect the indoor and outdoor spaces of the building after the fire window is opened to 90°.

[0038] In this embodiment, the rotating unit adopts two sets of cam indexing mechanisms 2, which are respectively disposed at the top and bottom of the window sash unit 1. Each cam indexing mechanism 2 is provided with a base 201 and a cam rotating component 202. The base 201 is installed on the window frame, and the cam rotating component 202 is fixedly connected to the window sash unit 1. It is not difficult to understand that in some other embodiments, the rotating unit may also take other forms, such as drive motors disposed at the top and bottom of the window sash unit. As long as they can achieve similar practical effects as this application, they should be included in the protection scope of this invention.

[0039] The base 201 is provided with a linear guide rail 203 and a rotary track 204. The rotation center of the cam rotating member 202 is movably mounted on the linear guide rail, and the cam rotating member 202 is provided with a first connecting member 205. The cam rotating member 202 is movably connected to the rotary track 204 through the first connecting member 205, so that the rotation center of the cam rotating member 202 can move along the linear guide rail 203 and the cam rotating member 202 can rotate along the rotary track 204.

[0040] In this embodiment, two sets of cam shifting mechanisms 2 are respectively set between the top plate of the window sash unit 1 and the top surface of the window frame, and between the bottom plate of the window sash unit 1 and the bottom surface of the window frame. On the one hand, the connection between the window sash unit 1 and the top surface of the window frame is realized. On the other hand, the window sash unit 1 is rotated relative to the window frame to realize the overall opening and closing of the fire window. The cam shifting mechanisms 2 are symmetrically arranged to make the window sash bear force evenly, prevent structural deformation or damage, and thus extend the service life of the mechanism.

[0041] Specifically, in this embodiment, a set of cam shifting mechanisms 2 consists of a base 201, a linear track, a rotary track 204, a cam rotating component 202, a first connecting component 205 for connecting the rotary track 204 and the cam rotating component 202, and a second connecting component 206 for connecting the linear guide rail 203 and the cam rotating component 202. It should be noted that in this preferred embodiment, the two sets of cam shifting mechanisms 2 are symmetrically arranged along the centerline between them, that is, the specific structural settings are exactly the same. In the following description, only the cam shifting mechanism 2 between the bottom plate of the window sash unit 1 and the bottom surface of the window frame will be described.

[0042] Specifically, the two sets of cam indexing mechanisms 2 bases 201 are respectively fixed to the bottom and top surfaces of the window frame using chemical bolts. The bases 201 are made of stainless steel. The linear guide rail 203 and the rotary track 204 are fixed to the bases 201 by a plurality of support columns, serving as the operating tracks for the first connector 205 and the second connector 206, thereby realizing the relative rotation of the window sash unit 1 relative to the window frame. By setting the support columns, the linear guide rail 203 and the rotary track 204 are moved away from the bases 201 to reserve space for the operation of the first connector 205 and the second connector 206 on the linear guide rail 203 and the rotary track 204.

[0043] In this embodiment, the linear guide rail 203 is used to limit the process of the cam rotating member 202 maintaining a nearly straight direction at its center. The geometric center of the cam rotating member 202 is mounted on the second connecting member 206 via a rotating shaft 2061. The second connecting member 206 is slidably connected to the linear guide rail 203 to achieve a straight process of the geometric center of the cam rotating member 202 on the linear guide rail 203. The rotating track 204 is used to realize the rotation of the cam rotating member 202 as a whole relative to its geometric center. During the rotation of the cam rotating member 202, since the cam rotating member 202 is fixedly installed in the mounting groove of the window sash unit 1, it drives the window sash unit 1 to rotate synchronously, thereby promoting the rotation of the window sash unit 1 relative to the window frame, thus completing the opening and closing switching of the fire window.

[0044] Furthermore, in this embodiment, the U-shaped steels of the linear guide rail 203 are arranged facing each other and are symmetrically arranged on one side of the bottom surface of the window sash. The U-shaped steels are provided with guide rails for sliding the second connector 206, and limit plates are provided at the beginning and end of the guide rails to prevent the second connector 206 from sliding out due to excessive running on the linear guide rail 203. The limit plates are detachably installed at the beginning and end of the guide rails to facilitate the disassembly, assembly, and maintenance of the second connector 206 on the linear guide rail 203.

[0045] Specifically, the second connecting member 206 includes a sliding part 2062, a rotating seat 2063, a rotating shaft 2061, and a support seat 2064. In this embodiment, the rotating seat 2063 is mounted above the linear guide rail 203, and the sliding part 2062 is fixedly connected below it for sliding contact with the oppositely arranged linear guide rail 203, thereby realizing the sliding of the cam rotating member 202 along the direction of the linear guide rail 203. In this embodiment, the sliding part 2062 adopts a pulley group symmetrically arranged on the linear guide rail 203. The support seat 2064 is fixedly connected to the cam rotating member 202 by bolts to realize the second connecting member 2062. The connecting piece 206 supports the cam rotating part 202. The center of the support seat 2064 is installed at the center of the base circle of the cam rotating part 202. The center of the sliding part 2062 is fixedly provided with a rotating shaft 2061. The center of the support seat 2064 is provided with a mounting hole. The mounting hole is rotatably installed on the rotating shaft 2061 to realize the relative rotation between the support seat 2064 and the sliding part 2062. When the second connecting piece 206 moves linearly along the linear guide rail 203, it can simultaneously rotate along the rotating track 204, thereby realizing the switching of the fire window opening and closing state as described above.

[0046] Furthermore, the rotating track 204 adopts a circular arc track; The rotating track 204 includes a main arc segment 207, a first locking arc 208, and a second locking arc 209. The center of the main arc segment 207 coincides with the geometric center of the window sash unit 1. The first locking arc 208 and the second locking arc 209 are respectively disposed at both ends of the main arc segment 207, and the line connecting the center of the first locking arc 208 and the center of the main arc segment 207 is perpendicular to it. When the connector is located at the first locking arc 208, the window sash unit 1 fills the window frame; when the connector is located at the second locking arc 209, the window sash unit 1 is perpendicular to the window frame; when the connector is located at the main arc segment 207, the window sash unit 1 rotates relative to the window frame.

[0047] Specifically, in this embodiment, the rotating track 204 adopts an arc-shaped guide rail, which consists of three arc segments: a main arc segment 207, a first locking arc 208, and a second locking arc 209. The main arc segment 207 of the rotating track 204 has a radius of 40 mm, and its center coincides with the geometric center of the window sash to ensure the controllable movement trajectory of the window sash unit 1. The two locking arc segments have a radius of 15 mm, and the angle between the line connecting the center of the two locking arc segments and the center of the main arc segment is 90 degrees. The aforementioned linear guide rail 203 is perpendicular to the symmetrical center line of the rotating track 204 and passes through the center of the main arc segment 207 (denoted as point O). That is, the perpendicular bisector of the arc-shaped guide rail satisfies the requirement of ensuring the accuracy of the sliding pin's movement trajectory and providing a guarantee for the accuracy of the subsequent rotation angle.

[0048] Furthermore, the first locking arc 208 and the second locking arc 209 are respectively located at both ends of the main arc segment 207. The radii of the first locking arc 208 and the second locking arc 209 are much smaller than those of the main arc segment 207, mainly serving as a small-sized side cabinet. The center of the first locking arc 208 is denoted as O1, and the center of the second locking arc 209 is denoted as O2. In this embodiment, the line connecting the center of the first locking arc 208 and the center of the main arc segment 207 is perpendicular to the line connecting the center of the second locking arc 209 and the center of the main arc segment 207, i.e., ∠O1OO2=90°. The first locking arc 208 and the second locking arc 209 achieve geometric self-locking through local curvature changes, serving as positioning and limiting functions.

[0049] Specifically, in this embodiment, when the first connector 205 is located at the first locking arc 208, the window sash unit 1 fills the window frame; when the first connector 205 is located at the second locking arc 209, the window sash unit 1 is perpendicular to the window frame; when the first connector 205 is located at the main arc segment 207, the window sash unit 1 rotates relative to the window frame. This embodiment, by setting the line connecting the center of the first locking arc 208 and the center of the main arc segment 207 perpendicular to the line connecting the center of the second locking arc 209 and the center of the main arc segment 207, ensures that when the fire window is closed, the window sash unit 1 is tightly filled into the window frame. When the first connector 205 slides from the first locking arc 208 to the second locking arc 209 via the main arc segment 207, the window sash unit 1 rotates inside the window frame while changing from a state of tight fit with the window frame to a state of close fit with the window frame, thereby leaving a passage for fire passage.

[0050] In this embodiment, the first connector 205 is a stainless steel cylindrical pin with a diameter of 10 mm, which slides inside the rotating track 204 to realize the rotation of the cam rotating component 202. The cylindrical pin and the rotating track 204 are fitted with a clearance to ensure the sliding flexibility between the cylindrical pin and the track during rotation and sliding.

[0051] Preferably, the surface of the stainless steel cylindrical pin can be chrome-plated to enhance its wear resistance and smoothness of movement.

[0052] It should be noted that, in this embodiment, the rotation of the window sash unit 1 is limited by the rotation track 204 and the linear guide rail 203. The side of the window frame space limited by the window frame frame has a reserved allowance for realizing the window sash unit 1, so as to ensure that the first connector 205 moves from the first locking arc 208 to the second locking arc 209 throughout the entire process. The opening and closing of the fire-fighting window will not be obstructed by external factors.

[0053] In this embodiment, a rotating track 204 and a linear guide 203 are set up, and a first connecting piece 205 and a second connecting piece 206 are slidably connected in the rotating track 204 and the linear guide 203, respectively. The first connecting piece 205 and the second connecting piece 206 are limited by the rotating track 204 and the linear guide 203. Without the need to perform a multi-step unlocking process, the continuous actions of unlocking, 90° rotation and final locking can be completed automatically, which significantly shortens the opening and closing time. It is suitable for emergency rescue scenarios and effectively improves rescue efficiency. Geometric self-locking is achieved by relying on the locking arc of the rotating mechanism. There is no need to occupy additional space to set up a locking mechanism. It has reliable locking ability in both fully closed and fully open states. It has excellent wind pressure resistance and vibration resistance performance, which can prevent accidental opening and closing, and ensure the safety of daily use and the stability of the rescue channel. Moreover, the window sash opening and closing process is smooth and effortless, without jamming or abnormal noise. The upper and lower cam rotation mechanisms 2 are symmetrically arranged, so that the window sash is subjected to uniform force, preventing structural deformation or damage, thereby extending the service life of the mechanism.

[0054] The cam indexing mechanism 2 further includes a second connector 206, which is provided with a rotating shaft 2061. The rotating shaft 2061 is connected to the center of the base circle of the cam rotating member 202, so that the cam rotating member 202 can rotate relative to the second connector 206 with the rotating shaft 2061 as the center. The second connector 206 is slidably attached to the linear guide rail 203.

[0055] Specifically, the second connecting member 206 includes a sliding part 2062, a rotating seat 2063, a rotating shaft 2061, and a support seat 2064. In this embodiment, the rotating seat 2063 is mounted above the linear guide rail 203, and the sliding part 2062 is fixedly connected below it for sliding contact with the oppositely arranged linear guide rail 203, thereby realizing the sliding of the cam rotating member 202 along the direction of the linear guide rail 203. In this embodiment, the sliding part 2062 adopts a pulley group symmetrically arranged on the linear guide rail 203. The support seat 2064 is fixedly connected to the cam rotating member 202 by bolts to realize the second connecting member 2062. The connecting piece 206 supports the cam rotating part 202. The center of the support seat 2064 is installed at the center of the base circle of the cam rotating part 202. The center of the sliding part 2062 is fixedly provided with a rotating shaft 2061. The center of the support seat 2064 is provided with a mounting hole. The mounting hole is rotatably installed on the rotating shaft 2061 to realize the relative rotation between the support seat 2064 and the sliding part 2062. When the second connecting piece 206 moves linearly along the linear guide rail 203, it can simultaneously rotate along the rotating track 204, thereby realizing the switching of the fire window opening and closing state as described above.

[0056] In a preferred embodiment of the present invention, a linkage pin is further included, which is simultaneously connected between the cam rotation mechanism 2 connecting members located at the top and bottom of the window sash unit 1, so that the two sets of cam rotating members 202 rotate synchronously. The surface of the linkage pin is covered with wear-resistant metal to enhance its wear resistance.

[0057] As described above, in this embodiment, the first connecting member 205 is a stainless steel cylindrical pin with a diameter of 10 mm, which slides inside the rotating track 204 to realize the rotation of the cam rotating member 202. In this embodiment, the top plate and bottom plate of the window sash unit 1 are respectively provided with through holes at the installation positions of the first connecting member 205 of the cam rotating mechanism connected to them, and there are also receiving spaces at the corresponding positions of the cam rotating member 202, so that the linkage pin can be installed in the through holes of the top plate and the bottom plate of the window sash unit 1, and directly connected to the first connecting member 205 in the two sets of cam rotating mechanisms, so as to realize the synchronous rotation of the cam rotating members 202 located on the top plate and bottom plate of the window sash unit 1, so that the window sash is subjected to uniform force, preventing structural deformation or damage, and extending the service life of the mechanism.

[0058] By setting a linkage pin, the cam rotation mechanism located at the top and bottom can be ensured to operate synchronously, avoiding radial tearing of the window sash unit 1 due to different rotation speeds, which could cause possible structural damage. In addition, the linkage pin also provides a force-saving point for applying external force. Users only need to push or pull the linkage pin directly or indirectly to disengage the first connecting piece 205 connected to the linkage pin from the self-locking arc, thereby releasing the self-locking state and switching the overall opening and closing state of the fire window.

[0059] It should be noted that in this embodiment, the linkage pin is directly connected to the first connecting member 205 so that the cam rotation mechanism can be operated by applying external force to the first connecting member 205, that is, by rotating to drive linear displacement; in some other embodiments, the linkage pin can also be directly connected to the second connecting member 206 so that the cam rotation mechanism can be operated by applying external force to the second connecting member 206, that is, by driving rotation through linear displacement. To achieve this purpose, it is only necessary to connect the linkage pin to the rotating seat 2063 of the second connecting member 206 so that the rotating seat 2063 can be pushed to move linearly in the linear guide rail 203 by external force.

[0060] It is easy to understand that in some other embodiments, a first linkage pin and a second linkage pin can be set separately. The first linkage pin is directly connected to the first connecting member 205 in the cam rotating member 202 set on the top and bottom plates of the window sash unit 1, while the second linkage pin is directly connected to the second connecting member 206 in the cam rotating member 202 set on the top and bottom plates of the window sash unit 1. Setting two sets of linkage pins at the same time makes the connection of the linkage pins more stable. According to actual operating habits, users can choose to push or pull the first linkage pin or the second linkage pin to open or close the fire window. It is easy to understand that the linkage pin can be designed along the edge of the window sash unit 1 to prevent the linkage pin itself from obstructing the smooth flow of the fire window when it is in the open state.

[0061] A preferred embodiment of the present invention further includes: an operation limiting device, which is installed on the indoor side of the window sash unit 1 and welded to the linkage pin, so as to enable the operation of the linkage pin by pushing and pulling the operation limiting device; The operating limit device is provided with anti-slip texture.

[0062] In this embodiment, the operating limit device is installed on the indoor side of the window sash unit 1 and is mechanically connected to the linkage pin or integrated into a single design. In this preferred embodiment, a red rectangular sliding plate is used as a warning and reminder. The rectangular sliding plate measures 100 mm × 50 mm and is 8 mm thick. The surface is textured with anti-slip patterns and indicator arrows pointing in the direction of sliding. It is fixedly connected to the indoor end of the linkage pin by welding. The installation position is located in the middle of the indoor side of the window sash, 1.2 m above the ground, facilitating quick identification and operation by firefighters. During use, the operator can quickly open and close the fire window by sliding the plate.

[0063] Preferably, the operating limit device can be equipped with an emergency glass-breaking device, which is linked to the operating limit device. An internal triggering mechanism is provided between them. When the user directly breaks the protective glass, the internal triggering mechanism is triggered and directly pushes the linkage pin, which in turn drives the connecting piece connected to the linkage pin, causing the cam rotating part 202 to rotate. After the user breaks the protective glass, the internal triggering mechanism can directly push the linkage pin to move, further shortening the opening time and adapting to the needs of emergency rescue scenarios.

[0064] Furthermore, in this embodiment, the window sash unit 1 is made of a lightweight metal panel. The interior side of the window sash unit 1 is provided with a decorative layer and a fireproof layer in sequence from the interior direction to the exterior direction. The decorative layer is used for decoration and to prevent external wear, while the fireproof layer is used to prevent indoor fire from spreading when a fire occurs, ensuring the overall stability of the fire window and preventing damage to the fire window structure when a fire occurs. The window sash unit 1 has a decorative layer, an insulation layer and a waterproof layer arranged sequentially on the outdoor side from the outdoor direction to the indoor direction.

[0065] Furthermore, in this embodiment, a sealing mounting groove is provided on the inner side of the window frame, and the sealing mounting groove is filled with a high-temperature resistant sealing strip; The window sash unit 1 is provided with sealing protrusions at corresponding positions to the window frame to ensure a sealing effect when the fire window is closed.

[0066] To achieve rapid switching between open and closed states of fire-fighting windows, the specific working process of this invention is as follows: The core indexing mechanism of this invention completes the continuous actions of unlocking, indexing, and locking sequentially by converting linear motion into rotational motion. Based on the mechanism's motion characteristics, its specific working process is as follows: 1. Initial locking state: The first connector 205 is located within the first locking arc 208 at one end of the rotating track 204. Because the curvature center of the locking arc is offset from the center of the middle section of the main arc segment 207, the first connector 205 forms a geometric lock (locking and limiting) at the first locking arc 208, and the mechanism is in a fixed state. The window sash cannot rotate freely at this time, ensuring sealing and structural safety under normal conditions.

[0067] 2. Opening and Closing Process: Firefighters apply a linear thrust to the operating limit device along the indoor direction. The operating limit device is linked with the linkage pin and the first connecting member 205. When the user applies force, the linear thrust is transmitted through the linkage pin to the first connecting member 205 and points towards the center. Under the constraint and drive of the linear guide rail 203 of the sliding pin, it first disengages from the initial first locking arc 208 and enters the main arc segment 207, completing the unlocking action. Continuing to push the operating device, the first connecting member 205 moves along the main arc segment 207, and the linear guide... Under the continuous constraint of the track 203, the cam rotating component 202 and the window sash unit 1 fixedly connected to the cam rotating component 202 rotate around the center O of the main arc, and the rotation angle gradually increases. When the first connecting component 205 moves to the second locking arc 209 at the other end of the rotating track 204, it is embedded in the locking arc segment under the action of the mechanism inertia or a small external force, realizing the secondary positioning and limit of the open state. At this time, the cumulative rotation angle of the window sash reaches 90°, which effectively prevents the window sash from closing accidentally and ensures the continuous and stable opening of the rescue passage.

[0068] Reset Process: The reverse drive operation limit device drives the first connecting piece 205 to move in the opposite direction, sequentially undergoing unlocking, reverse rotation, and locking processes—disengaging from the terminal locking arc segment, sliding along the main arc segment 207, and re-embedding into the initial locking arc. The mechanism returns to its initial locking state, and the window sash simultaneously resets and achieves reliable sealing and locking. This operation must be performed by professionals on the outdoor side to ensure that the structural and sealing performance after reset meets design requirements; at the same time, based on the reversible nature of the mechanism, it meets the need for repeated positioning, facilitating subsequent maintenance and cyclic use.

[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A 90° opening fire-fighting window based on a linear drive cam indexing mechanism, comprising a window frame, characterized in that, include: The window sash unit is a frame structure that can be rotated 90° inside the window frame to enable the opening and closing of the fire window. The window sash unit has an indoor side and an outdoor side that are arranged opposite to each other, as well as a fire passage between the indoor side and the outdoor side. The indoor side is flush with and enclosed to the interior facade of the building, and the outdoor side is flush with and enclosed to the exterior facade of the building. It also includes a rotating unit, which is disposed between the window sash unit and the window frame, so that the fire escape can connect the indoor and outdoor spaces of the building after the fire window is opened to 90°.

2. The fire-fighting window according to claim 1, characterized in that: The rotating unit is configured with two sets of cam indexing mechanisms, which are respectively located at the top and bottom of the window sash unit. Each cam indexing mechanism is provided with a base and a cam rotating component. The base is installed on the window frame, and the cam rotating component is fixedly connected to the window sash unit. The base is provided with a linear guide rail and a rotary track. The base circle portion of the cam rotating component is movably mounted on the linear track, and the cam rotating component is provided with a first connecting member. The cam rotating component is movably connected to the rotary track through the first connecting member, so that the cam rotating component can move along the linear guide rail and rotate along the rotary track at the same time.

3. The fire-fighting window according to claim 2, characterized in that: The rotating track is a circular arc track; The rotating track includes a main circular arc segment, a first locking arc, and a second locking arc. The center of the main circular arc segment coincides with the geometric center of the window sash unit. The first locking arc and the second locking arc are respectively located at both ends of the main circular arc segment, and the line connecting the center of the first locking arc and the center of the main circular arc segment is perpendicular to the line connecting the center of the second locking arc and the center of the main circular arc segment. When the first connector is located at the first locking arc, the window sash unit fills the window frame; when the first connector is located at the second locking arc, the window sash unit is perpendicular to the window frame; when the first connector is located at the main arc segment, the window sash unit rotates relative to the window frame.

4. The fire-fighting window according to claim 3, characterized in that: The cam indexing mechanism further includes a second connector, which is provided with a rotating shaft. The rotating shaft is connected to the center of the base circle of the cam rotating member, so that the cam rotating member can rotate relative to the second connector with the rotating shaft as the center. The second connector slides onto the linear guide rail.

5. The fire-fighting window according to claim 4, characterized in that: The second connecting member also includes a sliding part, a rotating seat, and a support seat. The rotating seat is mounted on the linear guide rail and is fixedly connected to the sliding part, which slides in contact with the linear guide rail. The support is fixedly connected to the cam rotating component, the rotating shaft is fixedly disposed on the rotating component, and the support has a mounting hole, which is rotatably mounted on the rotating shaft.

6. The fire-fighting window according to claim 5, characterized in that, Also includes: A linkage pin is simultaneously connected between the cam indexing mechanism connectors located at the top and bottom of the window sash unit, so that the two sets of cam rotating parts rotate synchronously. The surface of the linkage pin is covered with wear-resistant metal to enhance its wear resistance.

7. The fire-fighting window according to claim 6, characterized in that, Also includes: An operating limit device is installed on the indoor side of the window sash unit and welded to the linkage pin, so that the linkage pin can be operated by pushing and pulling the operating limit device. The operating limit device is provided with anti-slip texture.

8. The fire-fighting window according to claim 1, characterized in that: The window sash unit uses a lightweight metal panel, and the interior side of the window sash unit is provided with a finishing layer and a fireproof layer in sequence from the interior direction to the exterior direction; The window sash unit has a decorative layer, an insulation layer, and a waterproof layer arranged sequentially on the outdoor side from the outdoor direction to the indoor direction.

9. The fire-fighting window according to claim 8, characterized in that: The inner side of the window frame is provided with a sealing installation groove, and the sealing installation groove is filled with a high-temperature resistant sealing strip. The window sash unit is provided with sealing protrusions at corresponding positions to the window frame to ensure a sealing effect when the fire window is closed.

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