Polyurethane passive entry door with security monitoring function

Abstract

The application discloses a polyurethane passive entry door with security monitoring function, and particularly relates to the technical field of passive doors, which comprises a door frame, two door leaves hinged to the door frame and symmetrically distributed, one of the door leaves is provided with a monitoring part for real-time monitoring of the front of the door frame, a sealing strip is arranged between the door frame and the door leaves, the door frame and the door leaves are both filled with polyurethane material, an axis and a clamping block are respectively arranged on the two door leaves, a shell is rotatably connected to the axis, a wedge-shaped booster block is slidably connected in the shell, a driving mechanism is arranged on the axis for driving the shell to rotate and the booster block to move, and the driving mechanism drives the shell to rotate first and then drives the booster block to move when the driving mechanism operates. The application reduces the self-weight of the door under the premise of ensuring the strength, improves the safety of the family through the monitoring part, and improves the heat preservation and waterproof effects when the door leaves are closed through the sealing strip and the driving mechanism.

Description

Technical Field

[0001] This invention relates to the field of passive door technology, and more specifically, to a polyurethane passive entrance door with security monitoring function. Background Technology

[0002] With the increasing construction of urban buildings, the urban heat island effect has become increasingly severe. Urban heat islands raise the temperature of the entire city, leading to a further increase in air conditioning energy consumption. Passive low-energy buildings, however, do not contribute to the heat island effect. If many ordinary buildings that contribute to the heat island effect are converted into low-energy buildings, the heat island will be eliminated one by one. To better reduce energy consumption and mitigate the harm caused by the heat island effect, Germany proposed the concept of "passive houses" in the 1980s, based on low-energy building principles. A passive house achieves constant temperature, humidity, oxygen levels, cleanliness, and quietness throughout the year through thermal insulation of the ground, walls, doors, and windows, a fresh air system, and renewable energy sources such as solar and geothermal energy. Compared to traditional buildings, passive buildings can save more than 90% of energy consumption.

[0003] Currently, while wooden doors have a natural appearance, they offer poor insulation and soundproofing, are prone to warping due to moisture, and lack durability. Steel doors, although offering strong anti-theft capabilities, are too heavy, increasing the burden on hinges and door frames, and their high thermal conductivity makes them prone to condensation and frost in winter, resulting in significant thermal bridging. Ordinary composite doors often use rock wool or ordinary foam materials as filling layers, but rock wool easily absorbs water, leading to a decrease in insulation performance, and ordinary foam materials have poor flame retardancy, easily melting and dripping when exposed to fire, posing a safety hazard. Furthermore, their simple sealing structure makes it difficult to simultaneously meet the needs for insulation and soundproofing. In addition, traditional entrance doors have limited functions, only providing basic anti-theft or soundproofing capabilities, lacking intelligent security monitoring methods, and failing to meet the modern family's requirements for security and convenience.

[0004] While existing technologies include doors filled with polyurethane, they often only focus on thermal insulation performance and are not integrated with security monitoring systems. Furthermore, the sealing between door panels often relies on a single sealing strip, which can easily lead to poor sealing due to door panel deformation or hardware wear after long-term use, thus affecting airtightness.

[0005] Therefore, there is an urgent need for an entrance door that meets the requirements of passive building insulation and airtightness, has intelligent security monitoring functions, and is lightweight and high-strength, in order to solve the above-mentioned defects in existing technologies. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a polyurethane passive entrance door with security monitoring function, which solves the problems mentioned in the background art by setting up a pressure-increasing component.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a polyurethane passive entrance door with security monitoring function, comprising a door frame composed of multiple profiles, and two door leaves hinged to and symmetrically distributed with respect to the door frame, and further comprising:

[0008] The monitoring unit, located on one of the doors, is used to monitor the area in front of the door frame in real time and automatically identify strangers who linger for extended periods.

[0009] The insulation section includes a sealing strip between the door frame and the door leaf, and sealing strips are also provided at the close ends of the two door leaves to reduce the gap between the door frame and the door leaf. The door frame and the door leaf are filled with polyurethane material to reduce the weight of the door frame and the door leaf, improve the insulation and waterproofing effect when the door leaf is closed, and reduce the heat loss from the room.

[0010] The pressurization assembly includes a rotating shaft rotatably connected to one of the door panels, the rotating shaft being perpendicular to the end face of the door panel. A housing is rotatably connected to the rotating shaft, the housing being perpendicular to the end face of the door panel. The other door panel is provided with a locking block that can engage with the end of the housing. The locking block is L-shaped, with a horizontal lower end and a vertical upper end. The rear end of the housing is stepped. When the stepped end of the housing engages with the vertical end of the locking block, there is a gap between the housing and the other door panel, which provides space for subsequent pressurization of the two door panels.

[0011] A wedge-shaped pressure-boosting block is slidably connected inside the housing. The wedge-shaped end of the pressure-boosting block can contact the vertical end of the locking block. A driving mechanism is provided on the rotating shaft for driving the housing to rotate and the pressure-boosting block to move.

[0012] When the drive mechanism is running, it first drives the housing to rotate. The drive mechanism first drives the housing to rotate and cooperate with the locking block to achieve initial locking. Then it drives the pressure block to move, so that the wedge-shaped end of the pressure block contacts the vertical end of the locking block. When the pressure block moves, it will squeeze the locking block, thereby pressurizing the two door panels to achieve secondary pressurization and ensure that the two door panels fit tightly together.

[0013] Preferably, the door leaf includes a support frame and two door panels. The support frame is composed of profiles and is fixed between the two door panels. This structure has high strength, and the space between the support frame and the two door panels is filled with polyurethane material.

[0014] Preferably, the monitoring unit includes a sensing module, a camera module, a processing module, and a Wi-Fi module. The sensing module is used to sense human beings in front of the door, the camera module is used to take pictures of the identified human beings, and the processing module can identify the captured pictures and transmit the sensed and captured images to a handheld terminal to improve security.

[0015] Preferably, two pressure-applying components are provided, and the two pressure-applying components are symmetrically distributed vertically. The two pressure-applying components can make the door leaf be subjected to uniform force, thereby enhancing the sealing effect.

[0016] Preferably, a sleeve is fitted onto the pressure boosting block, and a screw is provided on the right side of the sleeve. The left end of the screw is rotatably connected to the end of the pressure boosting block. By rotating the screw, the initial position of the pressure boosting block can be adjusted, thereby adjusting the pressure boosting level to accommodate different sealing strip compression amounts.

[0017] Preferably, the sleeve is provided with a connecting plate, and a first elastic element is provided between the connecting plate and the housing. The first elastic element always has the tendency to drive the sleeve and the locking block away from the locking block. The first elastic element can provide a pre-tightening force to the sleeve so that the pressure block remains retracted when it is not in operation.

[0018] Preferably, the door leaf contains a motor, and the motor output is fixed to the rotating shaft. The motor serves as a drive source, enabling automated control.

[0019] Preferably, the driving mechanism includes a ring mounted on a rotating shaft, a pressure block on the ring, a fixing block and a stop block inside the housing, the pressure block being located between the fixing block and the stop block, a second elastic element being provided between the pressure block and the stop block, and a cam at the end of the rotating shaft, the cam maintaining contact with the right end of the sleeve. This structure, through the rotation of the rotating shaft, first causes the pressure block to push the stop block, driving the housing to rotate until the housing engages with the locking block. At this point, the pressure block continues to rotate, compressing the second elastic element, while simultaneously the cam rotates, pushing the sleeve and the pressure-boosting block to move, achieving secondary pressure boosting.

[0020] Preferably, the pressure block is provided with an arc-shaped rod, the center of which coincides with the axis of the rotating shaft. The stop block has a through hole that mates with the arc-shaped rod, and the free end of the arc-shaped rod passes through the through hole. The second elastic element is sleeved on the arc-shaped rod. The arc-shaped rod serves as a guide, ensuring stable compression of the second elastic element.

[0021] Preferably, the front end of the housing has an opening, and a cover plate is hinged to the opening end of the housing. A fixing bolt is provided at the free end of the cover plate, and a screw hole that mates with the fixing bolt is provided on the side wall of the housing. Opening the cover plate allows for convenient maintenance and adjustment of the internal drive mechanism.

[0022] The technical effects and advantages of this invention are as follows:

[0023] 1. This invention uses polyurethane material to fill the interior of the door frame and door leaf. Polyurethane material has an extremely low thermal conductivity, forming a highly efficient insulation layer through a foaming filling process, effectively blocking heat transfer and achieving low energy consumption. Compared with traditional entrance doors such as wooden doors, which have poor heat insulation and sound insulation, steel doors with high thermal conductivity that are prone to condensation and frost in winter, and ordinary composite doors with poor insulation performance, this invention provides a stable and long-term heat insulation performance for the entrance door, meeting low-carbon and energy-saving requirements. At the same time, the low density of polyurethane material reduces the door's weight while maintaining strength, reducing the load on hinges, door hinges, and other hardware, minimizing problems caused by excessive door weight, and further improving overall performance and service life.

[0024] 2. The monitoring unit in this invention can sense people in front of the door in real time. The camera module can take pictures of the identified people, and the processing module, after recognizing the photos, transmits the sensed and captured images to the user's handheld terminal. When a stranger lingers in front of the door for more than a set time, a photo is automatically taken and uploaded to the homeowner's mobile phone. The homeowner can then take appropriate action as needed, greatly improving home security and meeting the modern family's requirements for security and convenience. This also overcomes the shortcomings of traditional entrance doors, which have limited functionality and lack intelligent security monitoring capabilities.

[0025] 3. The sealing strip in the insulation section of this invention is compressed when the door is closed, effectively reducing the gap between the door frame and the door leaf. Through the coordinated action of the rotating shaft, housing, locking block, pressure-increasing block, and drive mechanism, the housing is first driven to rotate and engage with the locking block to achieve initial locking. Then, the pressure-increasing block is driven to move and pressurize the two door leaves, achieving secondary pressurization and ensuring a tight fit between the two door leaves. The two symmetrically distributed pressure-increasing components ensure even force distribution on the door leaves, enhancing the sealing effect. Moreover, the sleeve and screw design on the pressure-increasing block allows adjustment of its initial position, thereby adjusting the degree of pressurization to accommodate different sealing strip compression amounts. This improves the insulation and waterproofing effect when the door is closed, reducing heat loss from the room. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the pressurization component when it is opened in this invention.

[0028] Figure 3 This is a top sectional view of the overall structure of the present invention.

[0029] Figure 4 This is a schematic diagram of the door frame structure in this invention.

[0030] Figure 5 This is an exploded view of the door leaf in this invention.

[0031] Figure 6 This is a schematic diagram of the pressurization component in this invention.

[0032] Figure 7 This is a top sectional view of the pressurization component in this invention.

[0033] Figure 8 This is a schematic diagram of the pressurization component in this invention without the cover plate.

[0034] Figure 9 This is a front sectional view of the pressurization component in this invention.

[0035] Figure 10 This is a left-side sectional view of the pressurization component in this invention.

[0036] Figure 11 This is an exploded view of the pressurization component in this invention.

[0037] The attached figures are labeled as follows:

[0038] 1. Door frame; 2. Door leaf; 201. Support frame; 202. Door panel; 3. Monitoring unit; 4. Insulation unit; 401. Sealing strip; 402. Polyurethane material; 5. Pressurization component; 501. Rotating shaft; 502. Housing; 503. Locking block; 504. Pressure boosting block; 505. Drive mechanism; 5051. Ring; 5052. Pressure block; 5053. Fixing block; 5054. Stop block; 5055. Second elastic element; 5056. Cam; 6. Sleeve; 7. Screw; 8. Connecting plate; 9. First elastic element; 10. Motor; 11. Arc rod; 12. Through hole; 13. Cover plate; 14. Fixing bolt. Detailed Implementation

[0039] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0040] It should be noted that the terms "left", "right", "up", "down", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0041] like Figures 1 to 11 As shown, this embodiment provides a polyurethane passive entrance door with security monitoring function, including a door frame 1 and two door leaves 2 that are hinged to the door frame 1 and symmetrically distributed. The door leaves 2 can be rotated relative to the door frame 1 to open or close. The improvement of this invention is that a monitoring unit 3, a heat preservation unit 4 and a pressurizing component 5 are added.

[0042] The monitoring unit 3 is installed on one of the door panels 2, typically the normally open door panel 2, and is used to monitor the area in front of the door frame 1, i.e., the area outside the door, in real time. In this embodiment, the monitoring unit 3 includes a sensing module (such as an infrared sensor), a camera module (high-definition camera), a processing module, and a Wi-Fi module. It can sense the human body in front of the door, and when the human body stays for a long time, it can automatically take pictures and transmit them to the user's handheld terminal via a wireless network, realizing remote viewing and alarm functions.

[0043] It should be noted that the monitoring unit 3 and its internal components are all existing technologies, such as smart doorbells, which can realize remote viewing and alarm functions. Their specific structure will not be described in detail here.

[0044] The insulation section 4 includes a sealing strip 401 disposed between the door frame 1 and the door leaf 2, and polyurethane material 402 filled inside the door frame 1 and the door leaf 2. The sealing strip 401 can be made of elastic materials such as EPDM rubber and is installed in the groove of the door frame 1. When the door leaf 2 is closed, the sealing strip 401 is compressed, reducing the gap between the door frame 1 and the door leaf 2. The polyurethane material 402 has an extremely low thermal conductivity and is injected into the cavity of the door frame 1 and the door leaf 2 through a foaming filling process to form a highly efficient insulation layer that effectively blocks heat transfer.

[0045] like Figure 3 and Figure 5 As shown, the door leaf 2 includes a support frame 201 and two door panels 202, with the support frame 201 fixed between the two door panels 202. The support frame 201 can be made of welded or bolted metal profiles, and the door panels 202 can be made of steel plates or wooden panels, with a cavity in the middle for filling with polyurethane material 402. This structure has high strength and is easy to manufacture.

[0046] like Figure 1 , Figure 2 , Figure 7 and Figure 11 As shown, the pressurizing component 5 is used to pressurize both door leaves 2 after the door leaves 2 are closed, further compressing the sealing strip 401 and improving the sealing performance. In this embodiment, two pressurizing components 5 are provided, symmetrically distributed vertically along the height direction of the door leaves 2 to ensure uniform force on the door leaves 2. The pressurizing component 5 includes a rotating shaft 501, a housing 502, a locking block 503, a pressure-boosting block 504, and a driving mechanism 505.

[0047] A rotating shaft 501 is rotatably connected inside the side of one of the door leaves 2, with its axis perpendicular to the front end face of the door leaf 2. The rotating shaft 501 can be driven to rotate by a motor 10, which is installed inside the door leaf 2 and its output end is fixedly connected to the rotating shaft 501. A housing 502 is rotatably connected to the rotating shaft 501, meaning that the housing 502 can rotate freely relative to the rotating shaft 501 within a certain angle range. A corresponding locking block 503 is provided at the corresponding position of the other door leaf 2. The locking block 503 is generally L-shaped, with a horizontal lower end and a vertical upper end. When the housing 502 rotates to the horizontal position, its end can engage with the vertical end of the locking block 503.

[0048] It should be noted that the motor 10 is existing technology. It is electrically connected to the door lock system built into the door leaf 2. The motor 10 can be automatically started when the door lock system is started. Its specific structure will not be described in detail here.

[0049] The pressure boosting block 504 is wedge-shaped and slidably connected inside the housing 502, and can move along the axial direction of the housing 502. The wedge-shaped surface of the pressure boosting block 504 faces the direction of the locking block 503. When the pressure boosting block 504 extends, its wedge-shaped surface presses against the horizontal end of the locking block 503, thereby generating pressure perpendicular to the direction of the door leaf 2, causing the two door leaves 2 to move closer to each other.

[0050] The drive mechanism 505 is mounted on the rotating shaft 501 and is used to drive the housing 502 to rotate and the pressure block 504 to move, and to make these two actions proceed in sequence: first drive the housing 502 to rotate and engage with the locking block 503, and then drive the pressure block 504 to move to pressurize the two door panels 2.

[0051] like Figure 9 and Figure 11 As shown, a specific structure of the drive mechanism 505 includes: a ring 5051, a pressure block 5052, a fixing block 5053, a stop block 5054, a second elastic element 5055, and a cam 5056. The ring 5051 is fixedly mounted on the rotating shaft 501 and rotates together with the rotating shaft 501. The pressure block 5052 is fixedly disposed on the outer circumferential surface of the ring 5051 and is protruding. The fixing block 5053 and the stop block 5054 are fixedly disposed inside the housing 502, and are arranged at intervals along the circumferential direction of the rotating shaft 501, and are both located on the inner wall of the housing 502. The pressure block 5052 is located between the fixing block 5053 and the stop block 5054, and the second elastic element 5055 is provided between the pressure block 5052 and the stop block 5054, where a compression spring of the prior art can be provided. A cam 5056 is provided at one end of the rotating shaft 501 near the inside of the housing 502. The cam 5056 is in contact with the right end of the sleeve 6. The sleeve 6 is fitted on the pressure block 504 and can slide relative to it.

[0052] In the initial state, the door leaf 2 is open or has just closed but is not locked. The housing 502 is in a drooping state under the reverse rotation of the motor 10, and its end is disengaged from the vertical end of the locking block 503. When locking is required, the motor 10 drives the rotating shaft 501 to rotate counterclockwise. The rotating shaft 501 drives the ring 5051 and the cam 5056 to rotate together. Since the pressure block 5052 and the stop block 5054 are connected by the second elastic element 5055, in the initial stage of rotation, the pressure block 5052 pushes the stop block 5054. Due to the high rigidity of the second elastic element 5055, the stop block 5054 drives the entire housing 502 to rotate around the rotating shaft 501. The sleeve 6 and the pressure block 504 inside the housing 502 rotate together with the housing 502. There is no relative rotation between the sleeve 6 and the cam 5056, and the sleeve 6 does not move relative to the housing 502 until the end of the housing 502 engages with the locking block 503. At this time, the housing 502 is roughly horizontal and the housing 502 can no longer rotate.

[0053] The rotating shaft 501 continues to rotate counterclockwise, and the pressure block 5052 continues to move. However, because the housing 502 is stuck, the stop block 5054 cannot move. The sleeve 6 and the pressure block 504 inside the housing 502 cannot rotate with the housing 502. Therefore, the pressure block 5052 compresses the second elastic element 5055, and the cam 5056 rotates relative to the sleeve 6. The rotation of the cam 5056 pushes the sleeve 6 to move to the left. The sleeve 6 drives the pressure block 504 to extend, and its wedge-shaped surface presses against the stop block 503, thereby applying pressure to the door leaf 2. When the rotating shaft 501 rotates to the set angle, the pressure block 504 reaches its maximum stroke, and the door leaf 2 is pressed tightly. At this time, the motor 10 stops, and the state is maintained by the self-locking of the drive mechanism 505 or the braking of the motor 10.

[0054] When the door needs to be opened, the motor 10 rotates clockwise, the cam 5056 retracts first, and the pressure block 504 resets under the action of the first elastic element 9. The first elastic element 9 is located between the connecting plate 8 and the housing 502. The connecting plate 8 is fixed on the sleeve 6. The first elastic element 9 provides a rightward reset force. Then the pressure block 5052 moves in the opposite direction, and through the second elastic element 5055, it drives the stop block 5054, causing the housing 502 to rotate in the opposite direction and disengage from the locking block 503, so that the door 2 can be opened.

[0055] To facilitate adjustment of the boost level, such as Figure 7 As shown, in this embodiment, a sleeve 6 is fitted onto the pressure block 504. A screw 7 is provided on the right side of the sleeve 6. The left end of the screw 7 is rotatably connected to the end of the pressure block 504. Rotating the screw 7 can adjust the extension length of the pressure block 504 relative to the sleeve 6, thereby changing the initial position to adapt to the sealing strip 401 with different compression amounts.

[0056] In addition, such as Figure 11As shown, the pressure block 5052 is provided with an arc-shaped rod 11, the center of which coincides with the axis of the rotating shaft 501. The stop block 5054 is provided with a through hole 12 that mates with the arc-shaped rod 11. The free end of the arc-shaped rod 11 passes through the through hole 12. The second elastic element 5055 is sleeved on the arc-shaped rod 11. The arc-shaped rod 11 serves as a guide, ensuring the stable compression of the second elastic element 5055 and preventing it from bending.

[0057] For ease of maintenance, such as Figure 6 , Figure 10 and Figure 11 As shown, the front end of the housing 502 is provided with an opening, and a cover plate 13 is hinged to the opening end of the housing 502. A fixing bolt 14 is provided at the free end of the cover plate 13. A screw hole that mates with the fixing bolt 14 is provided on the side wall of the housing 502. Normally, the cover plate 13 is closed. When it is necessary to inspect the internal drive mechanism 505, the fixing bolt 14 is unscrewed and the cover plate 13 is opened.

[0058] The working principle of this invention is as follows: When door leaf 2 is closed, the door lock mechanism on door leaf 2 can automatically activate the pressurization component 5. The motor 10 drives the rotating shaft 501 to rotate counterclockwise, first causing the housing 502 to rotate to engage with the locking block 503, achieving initial locking; then the pressurizing block 504 extends under the push of the cam 5056, squeezing the two door leaves 2, further compressing the sealing strip 401 to achieve a good sealing effect. The monitoring unit 3 monitors the situation outside the door in real time and transmits the image to the user terminal. When the door needs to be opened, the door lock system on door leaf 2 starts the motor 10 to rotate clockwise, the pressurizing block 504 retracts first, and then the housing 502 rotates back to the initial position, and door leaf 2 can be opened normally.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A polyurethane passive entrance door with security monitoring function, comprising a door frame (1) and two door leaves (2) hinged to the door frame (1) and symmetrically distributed, characterized in that, Also includes: The monitoring unit (3) is installed on one of the door panels (2) and is used to monitor the front of the door frame (1) in real time. The insulation part (4) includes a sealing strip (401) disposed between the door frame (1) and the door leaf (2) to reduce the gap between the door frame (1) and the door leaf (2), and the interior of the door frame (1) and the door leaf (2) is filled with polyurethane material (402). The pressurizing assembly (5) includes a rotating shaft (501) rotatably connected to one of the door panels (2), a housing (502) rotatably connected to the rotating shaft (501), a locking block (503) on the other door panel (2) that can engage with the end of the housing (502), a wedge-shaped pressurizing block (504) slidably connected inside the housing (502), and a driving mechanism (505) on the rotating shaft (501) for driving the housing (502) to rotate and the pressurizing block (504) to move; When the drive mechanism (505) is running, it first drives the housing (502) to rotate and engage with the locking block (503), and then drives the booster block (504) to move, ensuring that the two door panels (2) fit tightly together; The drive mechanism (505) includes a ring (5051) disposed on a rotating shaft (501), a pressure block (5052) disposed on the ring (5051), a fixing block (5053) and a stop block (5054) disposed inside the housing (502), the pressure block (5052) being located between the fixing block (5053) and the stop block (5054), a second elastic element (5055) being disposed between the pressure block (5052) and the stop block (5054), and a cam (5056) being disposed at the end of the rotating shaft (501), the cam (5056) being in contact with the right end of the sleeve (6); The pressure block (5052) is provided with an arc-shaped rod (11), the center of the arc of the arc-shaped rod (11) coincides with the axis of the rotating shaft (501), the stop block (5054) is provided with a through hole (12) that cooperates with the arc-shaped rod (11), the free end of the arc-shaped rod (11) passes through the through hole (12), and the second elastic element (5055) is sleeved on the arc-shaped rod (11).

2. The polyurethane passive entrance door with security monitoring function according to claim 1, characterized in that, The door leaf (2) includes a support frame (201) and two door panels (202), wherein the support frame (201) is fixed between the two door panels (202).

3. The polyurethane passive entrance door with security monitoring function according to claim 1, characterized in that, The monitoring unit (3) includes a sensing module, a camera module, a processing module and a Wi-Fi module, which can transmit the sensed and captured images to the handheld terminal.

4. The polyurethane passive entrance door with security monitoring function according to claim 1, characterized in that, There are two pressurizing components (5), and the two pressurizing components (5) are symmetrically distributed vertically.

5. The polyurethane passive entrance door with security monitoring function according to claim 1, characterized in that, A sleeve (6) is fitted on the booster block (504), and a screw (7) is provided on the right side of the sleeve (6). The left end of the screw (7) is rotatably connected to the end of the booster block (504).

6. The polyurethane passive entrance door with security monitoring function according to claim 5, characterized in that, The sleeve (6) is provided with a connecting plate (8), and a first elastic element (9) is provided between the connecting plate (8) and the housing (502).

7. The polyurethane passive entrance door with security monitoring function according to claim 6, characterized in that, The door leaf (2) is equipped with a motor (10), and the output end of the motor (10) is fixed to the rotating shaft (501).

8. The polyurethane passive entrance door with security monitoring function according to claim 1, characterized in that, The front end of the housing (502) is provided with an opening, and a cover plate (13) is hinged to the opening end of the housing (502). A fixing bolt (14) is provided at the free end of the cover plate (13), and a screw hole that cooperates with the fixing bolt (14) is provided on the side wall of the housing (502).

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