An invisible fireproof door with flush frame and leaf openings

Abstract

The present invention relates to the technical field of invisible fireproof doors, and discloses an invisible fireproof door with flush frame and leaf openings, comprising a door frame and a fireproof door leaf, wherein the door frame is fixedly mounted on a wall, the fireproof door leaf is mounted on the door frame through an invisible hinge, an observation window is arranged on the fireproof door leaf, the exposed area of ​​the observation window on the fireproof door leaf is changed through an adjustment mechanism, display mechanisms are arranged on both sides of the observation window, the display mechanisms are used to display the environment on the other side of the fireproof door leaf, and a battery is installed at the bottom of the fireproof door leaf, the battery is used to power the display mechanism and the adjustment mechanism. The present invention utilizes an adjustment mechanism to protect both sides of the existing observation window, which can achieve the effect of dust prevention of the observation window on the one hand, and prevent the situation where dust affects the other side, so as to cause wrong judgment; on the other hand, it can also avoid the naked observation window in a non-working state from affecting its own invisible effect.

Description

Technical Field

[0001] The invention relates to the technical field of invisible fireproof doors, and in particular to an invisible fireproof door with flush frame and leaf openings. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are installed in fire partitions with certain fire resistance, such as fire compartments, evacuation stairwells, vertical shafts, etc. In housing buildings, they are specially used to isolate fire sources and play a huge role in firefighting. Once a fire occurs, people can get a chance to escape through fire doors.

[0003] Fire doors are classified into wooden fire doors, steel fire doors, steel-wood fire doors and other materials according to their types. The fire doors we commonly use are wooden fire doors and steel fire doors. According to the opening state, fire doors are divided into normally closed fire doors and normally open fire doors. Normally open fire doors are preferred for fire doors installed in places where people often pass through in buildings, and normally closed fire doors are used in other locations.

[0004] Although commonly used normally closed fire doors are equipped with observation windows, if a fire occurs on the other side, there will generally be a power outage, resulting in a lack of light and an inability to directly observe whether there is a fire on the other side. Once the door is opened rashly, the fire will take advantage of the gap to enter, causing the fire to spread and the person opening the door to be injured. Summary of the invention

[0005] The purpose of the present invention is to provide an invisible fire door with flush frame and leaf openings, so as to solve the technical problem that although the commonly used normally closed fire door is provided with an observation window, if a fire occurs on the other side, a power outage will generally occur, resulting in a lack of light and an inability to directly observe whether there is a fire on the other side. Once the door is opened rashly, the fire will take advantage of the gap to enter, causing the fire to expand and the person opening the door to be injured.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An invisible fireproof door with flush frame and leaf openings comprises a door frame and a fireproof door leaf, wherein the door frame is fixedly mounted on a wall, and the fireproof door leaf is mounted on the door frame via invisible hinges, an observation window is provided on the fireproof door leaf, and the exposed area of ​​the observation window on the fireproof door leaf is changed by an adjusting mechanism, display mechanisms are provided on both sides of the observation window, and the display mechanisms are used to display the environment on the other side of the fireproof door leaf, and a battery is installed at the bottom of the fireproof door leaf, and the battery is used to power the display mechanism and the adjusting mechanism.

[0008] As a further technical solution, the adjustment mechanism comprises: a vertical slide rail, two symmetrical vertical slide rails are embedded and fixed on one side of the fire door leaf, the vertical slide rails are respectively arranged on both sides of the observation window, and sliding members are slidably installed on the vertical slide rails, and a movable baffle is fixedly connected to one side of the two sliding members away from the vertical slide rails, and the movable baffles are opened and closed by a scissor assembly;

[0009] The scissor-type assembly includes four connecting rods connected end to end, wherein the upper ends of the connecting rods are hinged on the movable baffle, the lower ends of the connecting rods are hinged on the connecting column, the left and right ends of the connecting rods are respectively slidably connected to two horizontal slide rails, and a connecting spring is connected between the left and right ends of the connecting rod; when maintaining the initial state, the left and right ends of the connecting rod are close to each other; a vertical slide groove is opened on the fire door leaf, and the connecting column extends out of the vertical slide groove and is fixedly connected with a heat insulation sleeve.

[0010] As a further technical solution, a plurality of equally spaced limit parts are fixedly connected to one side wall of the vertical slide groove, the other end of the limit part is inclined upward, and a limit block is fixedly connected to the connecting column, one side of the limit block is in contact with and connected to the side wall of the vertical slide groove, and the other side is provided with a swing groove, and a swing plate is installed on the swing groove by rotation of a torsion spring, and a triangular part is provided on the bottom end of the swing plate facing the side of the swing groove.

[0011] As a further technical solution, a multi-section electric lifting rod is fixedly installed at the bottom of the vertical slide groove, and the top end of the multi-section electric lifting rod is in contact with the bottom of the limiting part.

[0012] As a further technical solution, the display mechanism includes a flue, which runs through the bottom of the fire door leaf, and closing plates are fixedly connected on both sides of the flue. The closing plate and the limit block are connected by a steel wire rope, and a telescopic spring is connected in series in the middle of the steel wire rope. A smoke sensor is installed in the middle of the flue, and a temperature sensor is installed in the flue near the closing plate. Display lights are embedded on both sides of the fire door leaf, and the display lights display red and green colors, and the display lights are electrically connected to the temperature sensor and the smoke sensor.

[0013] As a further technical solution, a touch switch is installed on the top of the closing plate, and the touch switch is used to control the on and off of the temperature sensors that are far away from each other. When the closing plate is moved up and opened, the touch switch is activated, and the temperature sensor paths that are far away from each other start to work;

[0014] A mounting frame is fixedly provided at the bottom of both sides of the fireproof door leaf, and a foot-operated airbag is fixedly installed on the mounting frame. The air outlet path of the foot-operated airbag passes through the flue, and the air inlet of the foot-operated airbag is opened at a position far away from the flue.

[0015] As a further technical solution, a sealing mechanism is further provided at the bottom of the fire door leaf, and the sealing mechanism is used to strengthen the sealing of the bottom of the fire door leaf.

[0016] As a further technical solution, the sealing mechanism includes a sealing strip, an embedding groove is provided at the bottom of the fire door leaf, a pressure strip plate is slidably connected in the embedding groove, the sealing strip is bonded and fixed to the bottom of the pressure strip plate, a linkage component is provided at the top of the pressure strip plate, the linkage component includes a rack plate, the bottom of the rack plate is configured as a plain plate, and the top is provided with a toothed portion, a gear is meshed on one side of the top of the rack, the gear and the idler wheel are both rotatably installed in the fire door leaf, the gear is meshed with the idler wheel, the idler wheel is meshed with the tooth plate, and the tooth plate is fixedly connected to the limit block.

[0017] Beneficial effects of the present invention:

[0018] (1) The present invention arranges the door frame and the fire door leaf flush with each other, and then uses the invisible hinge in the prior art to connect the door frame and the fire door leaf, so that the frame and leaf openings are flush with each other and parallel to the wall, achieving the purpose of invisible effect and making the fire door more beautiful. In addition, by adding a display mechanism, it is possible to directly determine whether a fire has occurred on the other side of the fire door without opening the door, thereby preventing the spread of fire and personal injury.

[0019] (2) The present invention is provided with an adjustment mechanism, and the adjustment mechanism is used to protect the two sides of the existing observation window. On the one hand, the observation window can be protected from dust, and the situation that the dust affects the other side, so as to prevent misjudgment; on the other hand, the exposed observation window in the non-working state can be prevented from affecting the stealth effect of the observation window itself;

[0020] (3) The present invention links the actions of the adjustment mechanism and the sealing mechanism through a linkage assembly, thereby realizing the linkage between the opening and closing of the observation window and the tightness of the sealing strip, facilitating the opening and closing of the fire door and extending the effective sealing of the fire door. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0023] Figure 2 It is an internal structure diagram of one embodiment of the present invention;

[0024] Figure 3 This is an internal structure diagram of another embodiment of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the adjustment mechanism in the present invention;

[0026] Figure 5 It is a schematic diagram of the internal structure of the vertical chute in the present invention;

[0027] Figure 6 It is a schematic diagram of the internal structure of the sealing mechanism in the present invention.

[0028] Description of the drawings: 1. Door frame; 2. Fireproof door leaf; 3. Invisible hinge; 4. Observation window; 5. Adjustment mechanism; 51. Vertical slide rail; 52. Sliding member; 53. Movable baffle; 54. Scissor assembly; 55. Connecting column; 56. Horizontal slide rail; 57. Connecting spring; 58. Insulation sleeve; 59. Vertical slide groove; 591. Limiting part; 592. Limiting block; 593. Swinging groove; 594. Swinging plate; 595. Triangular part; 596. Multiple Section: electric lifting rod; 6. display mechanism; 61. flue; 62. closing plate; 63. wire rope; 64. telescopic spring; 65. smoke sensor; 66. temperature sensor; 67. display light; 68. touch switch; 69. mounting bracket; 691. foot-operated airbag; 7. sealing mechanism; 71. sealing strip; 72. embedded groove; 73. pressure strip plate; 74. linkage assembly; 741. rack plate; 742. gear; 743. gear plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-6 As shown, the present invention is an invisible fireproof door with flush frame and leaf openings.

[0031] Embodiment 1:

[0032] It includes a door frame 1 and a fireproof door leaf 2, wherein the door frame 1 is fixedly mounted on the wall, and the fireproof door leaf 2 is mounted on the door frame 1 through an invisible hinge 3. An observation window 4 is provided on the fireproof door leaf 2, and the exposed area of ​​the observation window 4 on the fireproof door leaf 2 is changed through an adjustment mechanism 5. Display mechanisms 6 are provided on both sides of the observation window 4, and the display mechanisms 6 are used to display the environment on the other side of the fireproof door leaf 2. A battery is installed at the bottom of the fireproof door leaf 2, and the battery is used to power the display mechanism 6 and the adjustment mechanism 5.

[0033] As a further technical solution, the adjustment mechanism 5 includes: a vertical slide rail 51, two symmetrical vertical slide rails 51 are embedded and fixed on one side of the fire door leaf 2, the vertical slide rails 51 are respectively placed on both sides of the observation window 4, and sliding members 52 are slidably installed on the vertical slide rails 51, and a movable baffle 53 is fixedly connected to the side of the two sliding members 52 away from the vertical slide rail 51, and the movable baffles 53 are opened and closed by a scissor assembly 54;

[0034] The scissor assembly 54 includes four connecting rods connected end to end, wherein the upper ends of the connecting rods are hinged on the movable baffle 53, the lower ends of the connecting rods are hinged on the connecting column 55, the left and right ends of the connecting rods are respectively slidably connected to two horizontal slide rails 56, and a connecting spring 57 is connected between the left and right ends of the connecting rod; when maintaining the initial state, the left and right ends of the connecting rod are close to each other; a vertical slide groove 59 is opened on the fire door leaf 2, and the connecting column 55 extends out of the vertical slide groove 59 and is fixedly connected to a heat insulation sleeve 58.

[0035] A plurality of equally spaced limiting portions 591 are fixedly connected to one side wall of the vertical slide groove 59, and the other end of the limiting portion 591 is tilted upward. A limiting block 592 is fixedly connected to the connecting column 55, and one side of the limiting block 592 is in contact with and connected to the side wall of the vertical slide groove 59, and the other side is provided with a swing groove 593. The swing groove 593 is rotatably installed with a swing plate 594 through a torsion spring, and a triangular portion 595 is provided on the bottom end of the swing plate 594 facing the side of the swing groove 593.

[0036] In this embodiment, the door frame 1 and the fire door leaf 2 are arranged flush, and then the door frame 1 and the fire door leaf 2 are connected with the invisible hinge 3 in the prior art, so that the frame leaf opening is flush and parallel to the wall surface, achieving the purpose of invisible effect and making the fire door more beautiful; a display mechanism 6 is also added to achieve the purpose of directly judging whether a fire occurs on the other side of the fire door without opening the door, thereby preventing the spread of fire and injuries to personnel; at the same time, an adjustment mechanism 5 is also provided, and the adjustment mechanism 5 is used to protect both sides of the existing observation window 4, which can achieve the effect of dust prevention of the observation window 4 on the one hand, and prevent the dust from affecting the other side, so as to prevent the wrong judgment; on the other hand, it can also prevent the naked observation window 4 in the non-working state from affecting its own invisible effect;

[0037] Specifically, when it is needed, by pushing the connecting column 55 upward, the connecting column 55 drives the limit block 592 to move upward, and the swing plate 594 on one side of the limit block 592 contracts under the pressure of the limit portion 591 until it contracts to the point where the end can pass over the limit portion 591. When the limit portion 591 falls into the area between the two limit portions 591, the swing plate 594 that loses the pressure of the limit portion 591 quickly swings outward and opens under the action of the torsion spring, thereby getting stuck at the angle of the previous limit portion 591, and then stops being pushed further. In the case of the connecting column 55, the connecting column 55 cannot automatically fall down, and the connecting column 55 drives the lower end of the four-link rod to move upward, so that the left and right ends slide away from each other respectively, and the top end pulls the movable baffle 53 to retract downward until the connecting column 55 is pushed upward to a certain height, and then the movable baffle 53 can be moved down to expose the observation slot on one side. In order to realize the simultaneous opening of the observation windows 4 on both sides, the two connecting columns 55 are fixed by the connecting column 55 to realize the purpose of synchronously opening the two observation windows 4;

[0038] When the observation window 4 is opened, the situation on the other side can be directly observed, and whether there is burning smoke can be smelled through the passage left by the upward movement of the connecting column 55 to assist in judging the fire situation on the other side.

[0039] A multi-section electric lifting rod 596 is fixedly installed at the bottom of the vertical slide, and the top of the multi-section electric lifting rod 596 contacts the bottom of the limit part 591. When the battery is charged, the multi-section electric lifting rod 596 can directly use the multi-section electric push rod to extend and push the limit block 592 and the connecting column 55 upward to realize the automatic opening of the observation window 4. When the observation window 4 needs to be closed again, it only needs to manually press the swing plate 594 to reset it. Under the action of its own weight and the elastic force of the connecting spring 57, the four-link will quickly reset, and the connecting column 55 and the limit part 591 will also return to the bottom.

[0040] Embodiment 2:

[0041] The display mechanism 6 includes a flue 61, which runs through the bottom of the fire door leaf 2. Closing plates 62 are fixedly connected to both sides of the flue 61. The closing plate 62 is connected to the limit block 592 by a steel wire rope 63. A telescopic spring 64 is connected in series in the middle of the steel wire rope 63. A smoke sensor 65 is installed in the middle of the flue 61. A temperature sensor 66 is installed in the flue 61 near the closing plate 62. Display lights 67 are respectively embedded on both sides of the fire door leaf 2. The display lights 67 display red and green, and are electrically connected to the temperature sensor 66 and the smoke sensor 65.

[0042] A touch switch 68 is installed on the top of the closing plate 62, and the touch switch 68 is used to control the on and off of the temperature sensors 66 that are far away. When the closing plate 62 is moved up and opened, the touch switch 68 is activated, and the temperature sensors 66 that are far away work.

[0043] A mounting frame 69 is fixedly provided at the bottom of both sides of the fireproof door leaf 2, and a foot-operated airbag 691 is fixedly installed on the mounting frame 69. The air outlet path of the foot-operated airbag 691 passes through the flue 61, and the air inlet of the foot-operated airbag 691 is opened at a position far away from the flue 61.

[0044] In this embodiment, in order to prevent the fire on the other side from being directly viewed through the observation window 4, a specific structure of the display mechanism 6 is provided. Specifically, when the limit block 592 moves upward to open the observation window 4, the wire rope 63 is pulled, and the wire rope 63 drives the bottom closing plate 62 to move upward. The upward movement of the two closing plates 62 will, on the one hand, touch the top touch switch 68, start the temperature sensors 66 on both sides to measure the temperature, and on the other hand, open both ends of the flue 61 to allow the combustion smoke to enter from the flue 61. If a fire occurs on the other side, the temperature is higher, so one side is hot and the other side is cold. A temperature difference will appear on the door, generating thermal pressure, which will push the smoke to the cold side, so that the smoke will flow out from the side with lower temperature, allowing the smoke sensor 65 to perform detection work. Once one of the smoke sensor 65 and the temperature sensor 66 exceeds the set value, the display light 67 will display red. If both the smoke sensor 65 and the temperature sensor 66 do not exceed the set value, the display light 67 will display green. Through the display of red danger and green safety, personnel can intuitively know the situation on the other side in time to ensure the safety of personnel and prevent the spread of fire.

[0045] At the same time, in order to prevent smoke from not entering from the flue 61, or the speed at which smoke enters the flue 61 is too slow, a foot-operated airbag 691 is provided. When a person continuously steps on the foot-operated airbag 691 with one foot, the airflow ejected instantly flows through the flue 61 on the colder side. According to Bernoulli's principle, the smoke will flow to the side with a faster flow rate at this time, thereby ensuring the timeliness of the detection of the smoke sensor 65 and accelerating the display speed.

[0046] Embodiment 3:

[0047] A sealing mechanism 7 is also provided at the bottom of the fire door leaf 2, and the sealing mechanism 7 is used to strengthen the sealing of the bottom of the fire door leaf 2; the sealing mechanism 7 includes a sealing strip 71, and an embedding groove 72 is provided at the bottom of the fire door leaf 2, and a pressure strip plate 73 is slidably connected in the embedding groove 72, and the sealing strip 71 is bonded and fixed to the bottom of the pressure strip plate 73, and a linkage component 74 is provided on the top of the pressure strip plate 73, and the linkage component 74 includes a rack plate 741, and the rack plate 741 is configured as a plain plate at the bottom and a toothed portion is provided at the top, and a gear 742 is meshed on one side of the top of the rack, and the gear 742 and the idler wheel are both rotatably installed in the fire door leaf 2, the gear 742 is meshed with the idler wheel, and the idler wheel is meshed with the tooth plate 743, and the tooth plate 743 is fixedly connected to the limit block 592.

[0048] In the present embodiment, in order to achieve the sealing of the fire door in the normally closed state, a sealing mechanism 7 is further provided. Specifically, when the observation window 4 is opened, the upward movement of the limit block 592 will drive the connected tooth plate 743 to move upward, and the tooth plate 743 is meshed and driven by the gear 742, the idler wheel and the tooth plate 743, so that the tooth plate 743 moves up and down. The upward movement of the tooth plate 743 eliminates the downward pressure on the lower pressure strip plate 73. At this time, the sealing strip 71 is in a relaxed state. When the other side is safe, it can prevent the sealing strip 71 from being too tightly pressed against the fire door when opening, which is caused by friction and affects the sealing performance of the fire door in the future. When there is a fire on the other side, the observation window 4 is reclosed through the adjustment mechanism 5, so that the limit block 592 returns to the bottom, and the toothed plate 743 is pressed down again through the meshing transmission of the gear 742, the idler wheel and the toothed plate 743 until the pressure strip plate 73 and the bottom sealing strip 71 are compacted and pressed tightly, thereby ensuring that the gap at the bottom of the door leaf is sealed and extending the fireproof life of the fire door; the present invention connects the action of the adjustment mechanism 5 with the action of the sealing mechanism 7 through the linkage component 74, realizes the linkage between the opening and closing of the observation window 4 and the looseness and tightness of the sealing strip 71, facilitates the opening and closing action of the fire door, and extends the effective sealing of the fire door;

[0049] It should be noted that the pressure strip plate 73 can be set to a concave structure, and the sealing strip 71 is located at the concave part of the pressure strip plate 73. When the pressure strip plate 73 compresses the sealing strip 71 to the limit state, the pressure strip plate 73 can forcibly accommodate the sealing strip 71 to the concave part to prevent the sealing strip 71 from being burned by fire and prolong the sealing performance.

[0050] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An invisible fireproof door with flush frame and leaf openings, comprising a door frame (1) and a fireproof door leaf (2), characterized in that: The door frame (1) is fixedly mounted on the wall; the fireproof door leaf (2) is mounted on the door frame (1) via a hidden hinge (3); an observation window (4) is provided on the fireproof door leaf (2); the observation window (4) changes the exposed area on the fireproof door leaf (2) via an adjustment mechanism (5); display mechanisms (6) are provided on both sides of the observation window (4); the display mechanisms (6) are used to display the environment on the other side of the fireproof door leaf (2); a storage battery is installed at the bottom of the fireproof door leaf (2); the storage battery is used to adjust the display mechanism (6) and the fireproof door leaf (2); The regulating mechanism (5) is powered by the regulating mechanism (5); the regulating mechanism (5) comprises: a vertical slide rail (51), two symmetrical vertical slide rails (51) are embedded and fixed on one side of the fire door leaf (2), the vertical slide rails (51) are respectively arranged on both sides of the observation window (4), and sliding members (52) are slidably mounted on the vertical slide rails (51), and a movable baffle (53) is fixedly connected to the two sides of the two sliding members (52) facing away from the vertical slide rails (51), and the movable baffles (53) are opened and closed by a scissor assembly (54); The scissor assembly (54) includes four connecting rods connected end to end, wherein the upper ends of the connecting rods are hinged on the movable baffle (53), the lower ends of the connecting rods are hinged on the connecting column (55), the left and right ends of the connecting rods are respectively slidably connected to two transverse slide rails (56), and a connecting spring (57) is connected between the left and right ends of the connecting rod; when the initial state is maintained, the left and right ends of the connecting rod are close to each other; a vertical slide groove (59) is provided on the fireproof door leaf (2), and the connecting column (55) extends out of the vertical slide groove (59) and is fixedly connected to a heat insulation sleeve ( 58); a plurality of equally spaced limiting parts (591) are fixedly connected to one side wall of the vertical slide groove (59); the other end of the limiting part (591) is inclined upward; a limiting block (592) is fixedly connected to the connecting column (55); one side of the limiting block (592) is in contact with the side wall of the vertical slide groove (59); the other side is provided with a swing groove (593); the swing groove (593) is rotatably mounted with a swing plate (594) through a torsion spring; the bottom end of the swing plate (594) is provided with a triangular plate on the side facing the swing groove (593); The display mechanism (6) comprises a flue (61), the flue (61) runs through the bottom of the fireproof door leaf (2), both sides of the flue (61) are fixedly connected with a closing plate (62), the closing plate (62) and the limit block (592) are connected by a steel wire rope (63), a telescopic spring (64) is connected in series in the middle of the steel wire rope (63), a smoke sensor (65) is installed in the middle of the flue (61), and a temperature sensor (66) is installed in the position of the flue (61) close to the closing plate (62). ), display lights (67) are respectively embedded on both sides of the fireproof door leaf (2), the display lights (67) display red and green, and the display lights (67) are electrically connected to the temperature sensor (66) and the smoke sensor (65); a touch switch (68) is installed on the top of the closing plate (62), and the touch switch (68) is used to control the on and off of the temperature sensors (66) that are separated from each other. When the closing plate (62) moves up and opens, the touch switch (68) is activated, and the passages of the temperature sensors (66) that are separated from each other start to work; A mounting frame (69) is fixedly provided at the bottom of both sides of the fireproof door leaf (2), and a foot-operated airbag (691) is fixedly installed on the mounting frame (69). The air outlet path of the foot-operated airbag (691) passes through the flue (61), and the air inlet of the foot-operated airbag (691) is opened at a position away from the flue (61).

2. The invisible fireproof door with flush frame and leaf openings according to claim 1 is characterized in that: A multi-section electric lifting rod (596) is fixedly mounted on the bottom of the vertical slide groove, and the top end of the multi-section electric lifting rod (596) is in contact with the bottom of the limiting portion (591).

3. The invisible fireproof door with flush frame and leaf openings according to claim 2 is characterized in that: A sealing mechanism (7) is also provided at the bottom of the fireproof door leaf (2), and the sealing mechanism (7) is used to strengthen the sealing of the bottom of the fireproof door leaf (2).

4. The invisible fireproof door with flush frame and leaf openings according to claim 3 is characterized in that: The sealing mechanism (7) comprises a sealing strip (71), an embedding groove (72) is provided at the bottom of the fireproof door leaf (2), a pressure strip plate (73) is slidably connected in the embedding groove (72), the sealing strip (71) is bonded and fixed to the bottom of the pressure strip plate (73), a linkage assembly (74) is provided at the top of the pressure strip plate (73), the linkage assembly (74) comprises a rack plate (741), the bottom of the rack plate (741) is configured as a plain plate, the top is provided with a toothed portion, a gear (742) is meshed on one side of the top of the rack, the gear (742) and the idler wheel are both rotatably installed in the fireproof door leaf (2), the gear (742) is meshed with the idler wheel, the idler wheel is meshed with the toothed plate (743), and the toothed plate (743) is fixedly connected to the limit block (592).

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