Home-entry armored door structure

Abstract

The utility model relates to the technical field of entrance doors of civil residential buildings, in particular to an entrance armored door structure which comprises a door frame fixedly embedded in a wall body, a door body is installed on the door frame and comprises an inner door plate, an outer door plate and a door core, and the door core is rotatably connected to the inner side of the door frame. The inner door plate and the outer door plate are installed on the two side faces of the door core, the inner door plate and the door core are provided with first sealing assemblies corresponding to the door frame, the outer door plate and the door core are provided with second sealing assemblies corresponding to the door frame, and the bottom of the door core is provided with a third sealing assembly corresponding to the ground. Through cooperative work of the first sealing assembly, the second sealing assembly and the third sealing assembly, the door body is tightly attached to the door frame and the ground. According to the design, noise, dust and the like are effectively prevented from entering a room from the indoor side, the outdoor side, the bottom and the like of the home-entry armored door in all directions, and the overall sealing effect of the armored door is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of entrance door technology for civil residential buildings, specifically to an armored entrance door structure. Background Technology

[0002] In modern architecture, entrance doors serve as a crucial barrier for protecting family security and privacy, and their performance requirements are becoming increasingly stringent. Armored entrance doors, due to their high strength and high security, are highly favored in the market.

[0003] However, existing armored door sealing structures have flaws. In daily use, over time, and with frequent opening and closing operations, the sealing components are subjected to high-frequency friction and complex environmental conditions, making them prone to wear and aging. Once these problems occur, the armored door's sealing performance fails. The negative effects of this failure are significant. External dust can easily penetrate the interior through gaps, accumulating and making the indoor environment dirty and increasing the difficulty and frequency of daily cleaning. Simultaneously, noise can easily seep in; the sounds of traffic and surrounding noise severely disrupt the quiet atmosphere, greatly reducing the comfort and tranquility of the living environment and causing considerable disruption to residents' daily lives.

[0004] In conclusion, developing an armored door that can guarantee a tight seal is a key challenge that engineers urgently need to overcome. Utility Model Content

[0005] In order to develop an armored door that can guarantee sealing capability, this application provides an armored door structure.

[0006] The technical solution for the armored door structure provided in this application is as follows:

[0007] An armored entrance door structure includes a door frame fixedly embedded in a wall, a door body installed on the door frame, the door body including an inner door panel, an outer door panel, and a door core, the door core being rotatably connected to the inside of the door frame, the inner door panel and the outer door panel being installed on the two sides of the door core, a first sealing component being installed on the inner door panel and the door core corresponding to the door frame, a second sealing component being installed on the outer door panel and the door core corresponding to the door frame, and a third sealing component being installed at the bottom of the door core corresponding to the ground.

[0008] Furthermore, the first sealing assembly includes a first sealing frame, which is snapped onto the connection between the door core and the inner door panel; the first sealing frame is bent to form a first corner corresponding to the inner door panel, and the first corner is also in contact with the edge corner of the inner door panel; the first sealing frame is bent to form a second corner corresponding to the door core, and the second corner is also in contact with both the inner door panel and the door core; the first sealing frame is bent to form a third corner corresponding to the door frame, and a first sealing strip is installed on the side of the third corner away from the door core corresponding to the door frame; a first expansion bolt is installed on the first sealing frame at a position between the second corner and the third corner and is fixedly connected to the door core.

[0009] Furthermore, the second sealing assembly includes a second sealing frame, which is snapped onto the connection between the door core and the outer door panel; the second sealing frame is bent to form a fourth corner corresponding to the outer door panel, and the fourth corner is also in contact with the edge corner of the outer door panel; the second sealing frame is bent to form a fifth corner corresponding to the door core, and the fifth corner is in contact with both the outer door panel and the door core; a second sealing strip is installed on the side of the fourth corner away from the door core corresponding to the door frame; a second expansion bolt is installed on the second sealing frame at the position of the fifth corner and fixedly connected to the door core.

[0010] Furthermore, the third sealing component includes a telescopic elastic sealing strip, and a sealing cavity is formed at the bottom of the door core corresponding to the ground. The telescopic elastic sealing strip is slidably installed in the sealing cavity. An iron block is provided inside the telescopic elastic sealing strip, and a magnet is embedded in the ground corresponding to the iron block. A tension spring is fixedly connected to the side of the telescopic elastic sealing strip away from the ground, and the side of the tension spring away from the telescopic elastic sealing strip is fixedly connected to the sealing cavity.

[0011] Furthermore, a number of concealed hinges are embedded in the door frame corresponding to the door core. The side of the concealed hinge away from the door frame is fixedly connected to the door core, and the door body is rotatably connected to the door frame through the concealed hinges.

[0012] Furthermore, wall panels are fixedly installed on both the inner and outer sides of the wall corresponding to the door frame. The door frame is installed between two wall panels. The side of the door frame away from the door core is tightly fitted to the wall. Several third expansion bolts are fixedly installed inside the wall, and the third expansion bolts penetrate the wall and the door frame.

[0013] Furthermore, the door frame and the door body are made of high-melting-point steel, and the door core is filled with fireproof and soundproof filling material.

[0014] Furthermore, a handle is fixedly installed on the door, and the handle is made of a material with fireproof and heat-insulating properties.

[0015] Furthermore, a lock cylinder is installed on the door body, and the inner and outer sides of the lock cylinder body are surrounded by a fireproof barrier layer.

[0016] Furthermore, the first sealing strip, the second sealing strip, and the telescopic elastic sealing strip are all made of rubber.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] This application utilizes the coordinated operation of the first and second sealing components to ensure a tight seal between the sealing frame and the door core, inner and outer door panels, while simultaneously ensuring contact between the sealing strip and the door frame. The third sealing component employs a telescopic elastic sealing strip, allowing the door to fit snugly against the ground. These designs effectively block noise, air, dust, rainwater, insects, and other contaminants from entering the interior from all directions—the interior, exterior, and bottom—significantly improving the overall sealing performance of the armored door. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application.

[0020] Figure 2 This is a top view of one embodiment of the present application.

[0021] Figure 3 This is a side view structural diagram of one embodiment of this application.

[0022] Figure 4 yes Figure 2 Enlarged view of Part I of the structure.

[0023] Figure 5 yes Figure 2 Enlarged view of Part II of the structure.

[0024] Figure 6 yes Figure 3 Enlarged view of Part III of the structure.

[0025] Explanation of reference numerals in the attached drawings: 1. Wall; 100. Door frame; 101. Door body; 102. Inner door panel; 103. Outer door panel; 104. Door core; 105. Concealed hinge; 106. Wall panel; 107. Third expansion bolt; 108. Handle; 109. Lock cylinder; 200. First sealing assembly; 201. First sealing frame; 202. First corner; 203. Second corner; 204. Third corner; 205. First sealing strip; 206. First expansion bolt; 300. Second sealing assembly; 301. Second sealing frame; 302. Fourth corner; 303. Fifth corner; 304. Second sealing strip; 305. Second expansion bolt; 400. Third sealing assembly; 401. Telescopic elastic sealing strip; 402. Sealing cavity; 403. Iron block; 404. Magnet block; 405. Tension spring. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "level," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] This application discloses an armored door structure for entry.

[0030] Please refer to Figures 1 to 3In one embodiment of this application, an armored door structure includes a door frame 100 fixedly embedded in a wall 1, a door body 101 installed on the door frame 100, the door body 101 including an inner door panel 102, an outer door panel 103, and a door core 104, the door core 104 being rotatably connected to the inside of the door frame 100, the inner door panel 102 and the outer door panel 103 being installed on the two sides of the door core 104, a first sealing component 200 being installed on the inner door panel 102 and the door core 104 corresponding to the door frame 100, a second sealing component 300 being installed on the outer door panel 103 and the door core 104 corresponding to the door frame 100, and a third sealing component 400 being installed at the bottom of the door core 104 corresponding to the ground.

[0031] The implementation principle of an armored door structure in this application embodiment is as follows:

[0032] In use, the door core 104 is rotatably connected to the inside of the door frame 100, so that the door body 101 can rotate around the door frame 100 to open and close, in order to meet the needs of daily entry and exit.

[0033] When the door is closed, the first sealing component 200 comes into close contact with the door frame 100, preventing indoor and outdoor air from flowing through the gap between the inner door panel 102 and the door frame 100, thus sealing the interior and maintaining relatively stable indoor temperature, humidity, and other environmental conditions, while reducing the intrusion of external noise into the interior. The second sealing component 300 fits snugly against the door frame 100, preventing rainwater, dust, and other debris from entering the interior through the gap between the outer door panel 103 and the door frame 100, and further enhancing the noise insulation effect, protecting the internal structure of the door 101 from external environmental erosion. The third sealing component 400 contacts the ground, filling the gap between the bottom of the armored door and the ground, preventing dust, insects, and other debris from entering the interior from the bottom of the armored door, and also blocking outdoor wind from entering from the bottom of the armored door to a certain extent, thus improving the sealing performance of the armored door.

[0034] Please refer to Figures 1 to 4 In one embodiment of this application, the first sealing component 200 includes a first sealing frame 201, which is snapped onto the connection between the door core 104 and the inner door panel 102; the first sealing frame 201 is bent to form a first corner 202 corresponding to the inner door panel 102, and the first corner 202 is also in contact with the corner of the inner door panel 102; the first sealing frame 201 is bent to form a second corner 203 corresponding to the door core 104, and the second corner 203 is also in contact with both the inner door panel 102 and the door core 104; the first sealing frame 201 is bent to form a third corner 204 corresponding to the door frame 100, and a first sealing strip 205 is installed on the side of the third corner 204 away from the door core 104 corresponding to the door frame 100; a first expansion bolt 206 fixedly connected to the door core 104 is installed on the first sealing frame 201 at a position between the second corner 203 and the third corner 204.

[0035] For securing the door, the first expansion bolt 206 is installed on the first sealing frame 201 between the second corner 203 and the third corner 204 and is fixedly connected to the door core 104. When the first expansion bolt 206 is tightened, it generates an expansion force, which secures the inner door panel 102 to the door core 104 through the first sealing frame 201, ensuring that the first sealing frame 201 and the inner door panel 102 will not loosen or shift during daily use of the door.

[0036] When closed, the third corner 204 causes the first sealing strip 205 to fit tightly against the door frame 100. The first sealing strip 205 has good elasticity and flexibility, which can adapt to the slight unevenness of the surface of the door frame 100. Through its own compression deformation, it completely fills the gap between the inner door panel 102 and the door frame 100, thereby achieving an excellent sealing effect and effectively preventing indoor air and noise from entering the outside through the gap between the inner door panel 102 and the door frame 100.

[0037] Please refer to Figures 1 to 5 In one embodiment of this application, the second sealing component 300 includes a second sealing frame 301, which is snapped onto the connection between the door core 104 and the outer door panel 103; the second sealing frame 301 is bent to form a fourth corner 302 corresponding to the outer door panel 103, and the fourth corner 302 is also in contact with the corner of the outer door panel 103; the second sealing frame 301 is bent to form a fifth corner 303 corresponding to the door core 104, and the fifth corner 303 is also in contact with both the inner door panel 102 and the door core 104; a second sealing strip 304 is installed on the side of the fourth corner 302 away from the door core 104 corresponding to the door frame 100; a second expansion bolt 305 fixedly connected to the door core 104 is installed on the second sealing frame 301 at the position of the fifth corner 303.

[0038] During operation, the second expansion bolt 305 is fixedly connected to the door core 104 by installing it at the fifth corner 303 position on the second sealing frame 301. When the second expansion bolt 305 is tightened, the bolt generates expansion force, firmly securing the second sealing frame 301 to the door core 104 and tightly clamping the outer door panel 103 onto the door core 104. This operation ensures that during the daily use of the door 101, which involves repeated opening and closing, the second sealing frame 301 remains in its designated position and will not loosen or shift due to vibration, external pulling, or other factors, thus guaranteeing the stable functioning of the sealing assembly.

[0039] When closed, the fourth corner 302 causes the second sealing strip 304 to fit tightly against the door frame 100. The second sealing strip 304, with its excellent elasticity and flexibility, can adapt to any minor unevenness on the surface of the door frame 100. During contact, the second sealing strip 304, through its own compression and deformation, completely fills the gap between the outer door panel 103 and the door frame 100, achieving an excellent sealing effect and effectively preventing outside air, dust, noise, and rainwater from entering the room through the gap between the outer door panel 103 and the door frame 100.

[0040] Please refer to Figures 1 to 6 In one embodiment of this application, the third sealing component 400 includes a telescopic elastic sealing strip 401. A sealing cavity 402 is provided at the bottom of the door core 104 corresponding to the ground. The telescopic elastic sealing strip 401 is slidably installed in the sealing cavity 402. An iron block 403 is provided in the telescopic elastic sealing strip 401. A magnet block 404 is embedded in the ground corresponding to the iron block 403. A tension spring 405 is fixedly connected to the side of the telescopic elastic sealing strip 401 away from the ground. The side of the tension spring 405 away from the telescopic elastic sealing strip 401 is fixedly connected to the sealing cavity 402.

[0041] When the door 101 is closed, the door core 104 gradually approaches the ground where the magnet 404 is embedded. The magnet 404 then attracts the iron block 403, which overcomes the tension of the spring 405 on the telescopic elastic sealing strip 401, causing the telescopic elastic sealing strip 401 to extend towards the ground. When the door is fully closed, the telescopic elastic sealing strip 401 is in close contact with the ground, and due to the magnetic force between the magnet 404 and the iron block 403, the telescopic elastic sealing strip 401 remains firmly attached to the ground.

[0042] When the door 101 is opened, the door core 104 gradually moves away from the ground where the magnet block 404 is embedded. As a result, the attraction between the magnet block 404 and the iron block 403 weakens. At the same time, the tension force generated by the stretched spring 405 on the telescopic elastic sealing strip 401 automatically pulls the telescopic elastic sealing strip 401 back into the sealing cavity 402, thus avoiding continuous friction between the sealing strip and the ground during frequent opening and closing of the door.

[0043] This automatic telescopic mechanism not only extends the service life of the telescopic elastic sealing strip 401, reducing the cost and hassle of frequent replacement of the sealing strip, but also prevents the sealing strip from losing its sealing performance due to long-term wear, ensuring that the sealing effect at the bottom of the door always remains in good condition.

[0044] Please refer to Figures 1 to 3In one embodiment of this application, a plurality of concealed hinges 105 are embedded in the door frame 100 corresponding to the door core 104. The side of the concealed hinge 105 away from the door frame 100 is fixedly connected to the door core 104, and the door body 101 is rotatably connected to the door frame 100 through the concealed hinges 105.

[0045] During operation, the concealed hinge 105 is embedded within the door frame 100 at the position corresponding to the door core 104. This embedded installation method ensures that the concealed hinge 105 is not directly exposed in appearance, maintaining the overall simplicity of the door frame 100. The side of the concealed hinge 105 furthest from the door frame 100 is fixedly connected to the door core 104. Through this connection method, the door frame 100 and the door core 104 are effectively combined, providing a support point for the rotation of the door 101.

[0046] Please refer to Figures 1 to 3 In one embodiment of this application, wall panels 106 are fixedly installed on both the inner and outer sides of the wall 1 corresponding to the door frame 100. The door frame 100 is installed between two wall panels 106. The side of the door frame 100 away from the door core 104 is tightly fitted to the wall 1. Several third expansion bolts 107 are fixedly installed inside the wall 1. The third expansion bolts 107 penetrate the wall 1 and the door frame 100.

[0047] During operation, the door frame 100 is fixed to the wall 1 by installing several third expansion bolts 107 inside the wall 1. The third expansion bolts 107 penetrate the wall 1 and the door frame 100. When the third expansion bolts 107 are tightened, their expansion parts will expand in the holes of the wall 1 and the door frame 100, generating huge friction and compressive forces, thereby firmly fixing the door frame 100 to the wall 1 and preventing the door frame 100 from shaking or shifting.

[0048] Meanwhile, the wall panel 106 can cover the installation gap between the door frame 100 and the wall 1, as well as components such as the third expansion bolt 107, making the appearance around the entrance door neater and more beautiful.

[0049] Please refer to Figures 1 to 3 In one embodiment of this application, the door frame 100 and the door body 101 are made of high melting point steel, and the door core 104 is filled with fireproof and soundproof filling material.

[0050] During the work process, the high melting point steel used can be stainless steel. Because it contains alloying elements such as chromium and nickel, it has good corrosion resistance and high temperature resistance. At the same time, the melting point of stainless steel is usually between 1375-1450℃, which is much higher than that of ordinary steel. In addition, its strength and hardness are also excellent, and it can resist violent damage and prying.

[0051] Inorganic fireproof boards can be used as fireproof and soundproof filling materials. These boards are typically made of inorganic cementitious materials and reinforcing fibers, resulting in a relatively dense structure. This dense structure does not burn at high temperatures and forms a dense protective layer that prevents heat and flames from penetrating. Simultaneously, it hinders sound transmission; when sound encounters the fireproof board, some sound is reflected back, while some is absorbed and scattered within the board, thus reducing sound transmission and improving sound insulation performance.

[0052] Please refer to Figures 1 to 3 In one embodiment of this application, a handle 108 is fixedly installed on the door body 101, and the handle 108 is made of a material with fireproof and heat-insulating properties.

[0053] During operation, fiberglass can be used as a fireproof and heat-insulating material. Since fiberglass is an inorganic non-metallic material with good heat insulation properties, when combined with a plastic matrix, it can effectively reduce the overall heat conduction. In addition, fiberglass itself is non-combustible, which can improve the fire resistance of the material. At the same time, it has good mechanical properties and can withstand certain external forces.

[0054] In the event of a fire, the door may be affected by high temperatures and heat up. The fireproof and heat-insulating handle 108 can slow down the rate of heat conduction, so that the surface temperature of the handle 108 will not rise rapidly, thereby preventing users from being burned when touching the handle 108. The handle 108 can be used to open the door and escape.

[0055] Please refer to Figures 1 to 3 In one embodiment of this application, a lock cylinder 109 is installed on the door body 101, and the inner and outer sides of the lock cylinder 109 body are surrounded by a fireproof barrier layer.

[0056] During operation, the fire-resistant barrier layer is typically made of materials with low thermal conductivity, such as ceramic fiber and vermiculite. These materials slow down the transfer of heat from the door body 101 to the main body of the lock cylinder 109. In the event of a fire, the temperature around the door body 101 rises rapidly. The fire-resistant barrier layer effectively blocks heat conduction, keeping the main body of the lock cylinder 109 at a relatively low temperature for a certain period of time. This prevents the lock cylinder 109 from deforming, being damaged, or its internal parts from melting due to high temperatures, thus ensuring that the lock cylinder 109 can function normally.

[0057] At the same time, the lock cylinder 109 and other fireproof components of the door body 101 work together to form a complete fireproof system, effectively preventing the spread of fire through various parts of the armored door and improving the fire resistance limit of the armored door in a fire.

[0058] Please refer to Figures 1 to 3 In one embodiment of this application, the first sealing strip 205, the second sealing strip 304, and the telescopic elastic sealing strip 401 are made of rubber.

[0059] During operation, due to the good elasticity of rubber, when the door is closed, these sealing strips are squeezed between the door body 101 and the door frame 100, and undergo elastic deformation to fill the gap between the door body 101 and the door frame 100, thereby forming a sealing structure to prevent air, dust, noise and other substances from being transmitted through the gap; at the same time, the rubber sealing strips can also play a buffering role, reducing the collision between the door body 101 and the door frame 100, reducing the impact force and noise generated when the door is closed, and also protecting the surface of the door body 101 and the door frame 100 from damage, thus extending the service life of the armored door.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A structure of a home entry armored door, characterized by: The application relates to a door frame (100) fixedly embedded in a wall (1), wherein a door body (101) is installed on the door frame (100), the door body (101) comprises an inner door plate (102), an outer door plate (103) and a door core (104), the door core (104) is rotationally connected to the inner side of the door frame (100), the inner door plate (102) and the outer door plate (103) are installed on the two side faces of the door core (104), the inner door plate (102) is provided with a first sealing assembly (200) corresponding to the installation of the door frame (100) on the door core (104), the outer door plate (103) is provided with a second sealing assembly (300) corresponding to the installation of the door frame (100) on the door core (104), and the bottom of the door core (104) is provided with a third sealing assembly (400) corresponding to the ground.

2. A front door structure according to claim 1, characterized in that: The first sealing assembly (200) comprises a first sealing frame (201) which is clamped at the joint of the door core (104) and the inner door plate (102), the first sealing frame (201) is bent to form a first corner (202) corresponding to the inner door plate (102), the first corner (202) is in contact with the corner of the inner door plate (102) at the same time, the first sealing frame (201) is bent to form a second corner (203) corresponding to the door core (104), the second corner (203) is in contact with the inner door plate (102) and the door core (104) at the same time, the first sealing frame (201) is bent to form a third corner (204) corresponding to the door frame (100), the third corner (204) is provided with a first sealing strip (205) corresponding to the installation of the door frame (100) on the side face away from the door core (104), and the first sealing frame (201) is provided with a first expansion bolt (206) fixedly connected to the door core (104) at the position between the second corner (203) and the third corner (204).

3. The armored door structure of claim 1, wherein: The second sealing assembly (300) comprises a second sealing frame (301) which is clamped at the joint of the door core (104) and the outer door plate (103), the second sealing frame (301) is bent to form a fourth corner (302) corresponding to the outer door plate (103), the fourth corner (302) is in contact with the corner of the outer door plate (103) at the same time, the second sealing frame (301) is bent to form a fifth corner (303) corresponding to the door core (104), the fifth corner (303) is in contact with the outer door plate (103) and the door core (104) at the same time, the fourth corner (302) is provided with a second sealing strip (304) corresponding to the installation of the door frame (100) on the side face away from the door core (104), and the second sealing frame (301) is provided with a second expansion bolt (305) fixedly connected to the door core (104) at the position of the fifth corner (303).

4. The armored door structure of claim 1, wherein: The third sealing assembly (400) comprises a telescopic elastic sealing strip (401), a sealing cavity (402) is opened in the bottom of the door core (104) corresponding to the ground, the telescopic elastic sealing strip (401) is slidably installed in the sealing cavity (402), an iron block (403) is arranged in the telescopic elastic sealing strip (401), a magnet block (404) is embedded in the ground corresponding to the iron block (403), a tension spring (405) is fixedly connected to the side, away from the ground, of the telescopic elastic sealing strip (401), and the side, away from the telescopic elastic sealing strip (401), of the tension spring (405) is fixedly connected with the sealing cavity (402).

5. The armored door structure of claim 1, wherein: The door frame (100) is embedded with a plurality of concealed hinges (105) corresponding to the door core (104), the concealed hinges (105) are fixedly connected with the door core (104) on the side, away from the door frame (100), and the door body (101) is rotatably connected with the door frame (100) through the concealed hinges (105).

6. A front door structure according to claim 1, characterized in that: The wall body (1) is fixedly installed with wallboards (106) on the inner and outer sides corresponding to the door frame (100), the door frame (100) is installed between the two wallboards (106), the side, away from the door core (104), of the door frame (100) is closely attached to the wall body (1), and a plurality of third expansion bolts (107) are fixedly installed in the wall body (1) and penetrate the wall body (1) and the door frame (100).

7. A front door structure according to claim 1, characterized in that: The material of the door frame (100) and the door body (101) is high-melting-point steel, and the door core (104) is internally provided with fireproof and soundproof filling material.

8. A front door structure according to claim 1, characterized in that: A handle (108) is fixedly installed on the door body (101), and the material of the handle (108) is a material with fireproof and heat-insulating properties.

9. The armored door structure of claim 1, wherein: A lock core (109) is installed on the door body (101), and a fireproof barrier layer is arranged around the inner and outer parts of the main body of the lock core (109).

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