Hidden civil air defense door for exhibition hall

Abstract

The utility model discloses a hidden civil air defense door for an exhibition hall, which relates to the technical field of civil air defense doors for exhibition halls and comprises a door body, a door frame is mounted on the periphery of the door body, one side of the door body is hinged to the door frame, a hand crank is mounted at the center of the front side of the door body, a mounting cavity is formed in the door body, and a locking mechanism is arranged in the mounting cavity. The locking mechanism comprises driving rods, the driving rods are located on the upper side and the lower side of the hand crank, mounting bases are arranged on the sides, away from each other, of the two driving rods, the two mounting bases are symmetrically arranged along the axis of the door body, notches are formed in the mounting bases, the opening of the notch located on the upper portion faces rightwards, and the opening of the notch located on the lower portion faces leftwards. A sliding strip is slidably mounted in the notch; according to the utility model, through the cooperation of the hand crank and the driving rod, the locking and unlocking functions of the door body are realized, the operation is simple and convenient, and the locking mechanism adopts the combination of the gear, the rack and the insertion block, so that the door body is firm and reliable in a locking state and is not easy to be damaged by external force.

Description

Technical Field

[0001] This utility model relates to the field of exhibition hall civil defense door technology, specifically a hidden civil defense door for exhibition halls. Background Technology

[0002] Civil defense doors, also known as air defense doors, are the entrances and exits of civil defense projects. They belong to civil defense protection equipment. In the exhibition hall environment, civil defense doors not only bear the heavy responsibility of security protection, but also need to meet multiple requirements such as aesthetics, practicality, and convenience. Civil defense doors are mainly used to protect people's lives and property and prevent external threats (such as air raids, natural disasters, etc.) from damaging the interior of the exhibition hall. According to the usage scenario and functional requirements, civil defense doors can be divided into various types, such as ordinary single and double-leaf protective airtight doors and airtight doors, as well as single and double-leaf protective airtight doors and airtight doors with movable thresholds. These different types of civil defense doors have their own characteristics in terms of structure, performance, and usage, which can meet the personalized needs of different exhibition halls.

[0003] In the existing technology system of air defense doors, the design of the locking structure often relies on the locking mechanism built into the handle of the air defense door. Although this design meets the locking requirements of air defense doors to a certain extent, its complex locking structure and long transmission route bring significant problems. Especially in public places such as exhibition halls that require efficient management and rapid response, the time spent in locking and unlocking the existing air defense door technology is too long, which not only affects the convenience of daily use, but may also become an obstacle to evacuation and rescue in emergency situations. Utility Model Content

[0004] The purpose of this utility model is to provide a hidden air defense door for exhibition halls to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a hidden air-raid shelter door for exhibition halls, including a door body with a door frame installed around its perimeter. One side of the door body is hinged to the door frame. A hand crank is installed at the center of the front of the door body. An installation cavity is formed inside the door body, and a locking mechanism is provided within the installation cavity. The locking mechanism includes drive rods located on the upper and lower sides of the hand crank. Mounting seats are provided on the sides of the two drive rods that are far apart from each other. The two mounting seats are symmetrically arranged along the axis of the door body, and each mounting seat has a slot. The upper slot opens to the right, and the lower slot opens to the left. A slide bar is slidably installed in the slot. A rack is connected to the side of the slide bar away from the slot. A slide block is fixedly installed in the mounting cavity and rotatably connected to a gear. There are two slide blocks and racks, which are symmetrically arranged on the upper and lower sides of the gear. The slide block has a groove that matches the width of the rack. The rack is slidably connected to the slide block. The two racks mesh with the upper and lower sides of the gear. A plug block is installed on the side of the rack that is not connected to the slide block and is closer to the door frame.

[0006] Furthermore, a first telescopic column is installed between the drive rod and the slide bar, and a first spring is sleeved on the first telescopic column. The upper and lower ends of the first spring are fixedly connected to the slide bar and the drive rod, respectively.

[0007] Furthermore, a horizontal square groove is provided at the bottom of the slot, which can accommodate the first spring and the first telescopic column to slide horizontally, and limit protrusions are installed on both sides of the bottom of the square groove.

[0008] Furthermore, the door frame has insertion slots on both sides that match the vertical cross section of the insertion block, and two racks located above the gears are equipped with limit strips on both sides. The slide block has grooves on both sides of the slide groove that match the limit strips.

[0009] Furthermore, the hand crank is equipped with a locking mechanism, which includes a central column connected to the hand crank. One end of the central column located in the mounting cavity is fixedly connected to the drive rod. A collar is fitted on the outer arc wall of the central column. An mounting tube is installed on the front of the door body. A connecting block is slidably installed inside the mounting tube. A lock tongue is installed at one end of the connecting block. The collar has two lock holes that match the lock tongue.

[0010] Furthermore, one side of the mounting tube is in a closed state, and a second telescopic column is connected between the closed end and the connecting block. The second telescopic column is fitted with a second spring, and the two ends of the second spring are fixedly connected to the connecting block and the mounting tube. A groove with a vertical cross-sectional height smaller than that of the connecting block is opened on the surface of the mounting tube, and a handle is installed in the groove. The handle is fixedly connected to the connecting block.

[0011] Furthermore, a connecting column is provided above the door body, the connecting column is close to the side where the door body is hinged to the door frame, an arc-shaped track is installed above the connecting column, a supporting rib is connected between the arc-shaped track and the top wall, an arc-shaped groove is opened in the arc-shaped track, and a pulley is installed on the top of the connecting column, the pulley is slidably connected to the arc-shaped groove.

[0012] Furthermore, the front and back of the door are both made of gypsum board, and a flame-retardant base layer is provided between the gypsum board and the mounting cavity of the door, and several reinforcing ribs are provided inside the mounting cavity.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model achieves the locking and unlocking functions of the door through the cooperation of the hand crank and the drive rod. It is easy to operate. The locking mechanism adopts a combination of gears, racks and pinions to ensure that the door is firm and reliable in the locked state and is not easily damaged by external forces.

[0015] 2. This utility model, through the design of arc-shaped track and pulley, enables the door to move along a preset trajectory when opening and closing, ensuring the stability and safety of the door. The setting of reinforcing ribs enhances the overall strength and stability of the door, improves the impact resistance of the door, and the unlocking process of the locking mechanism is relatively simple. Users only need to pull the handle to unlock. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main structure of a concealed air-raid shelter door for an exhibition hall;

[0017] Figure 2 A schematic diagram of a hidden air-raid shelter door in a locked state in an exhibition hall;

[0018] Figure 3 This is a structural diagram of a hidden air-raid shelter door in an exhibition hall in its unlocked state.

[0019] Figure 4 An exploded view of the locking mechanism in a concealed air-raid shelter door for an exhibition hall;

[0020] Figure 5 This is a schematic diagram of the structure within the arc-shaped track of a concealed air-raid shelter door for an exhibition hall.

[0021] Figure 6 This is a schematic diagram of the locking mechanism in a hidden air-raid shelter door for an exhibition hall.

[0022] In the picture:

[0023] 1. Door body; 2. Door frame; 3. Curved track; 4. Support rib; 5. Connecting post; 6. Hand crank; 7. Drive rod; 8. Reinforcing rib; 9. Slide seat; 10. Mounting seat; 11. Slide bar; 12. Rack; 13. Insert block; 14. Limiting protrusion; 15. First spring; 16. First telescopic post; 17. Groove; 18. Gear; 19. Pulley; 20. Collar; 21. Locking tongue; 22. Connecting block; 23. Handle; 24. Second spring; 25. Second telescopic post; 26. Mounting tube. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution:

[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a hidden air-raid shelter door for exhibition halls includes a door body 1, with a door frame 2 installed around the door body 1. One side of the door body 1 is hinged to the door frame 2. A hand crank 6 is installed at the center of the front of the door body 1. An installation cavity is opened inside the door body 1, and a locking mechanism is installed in the installation cavity. The locking mechanism includes drive rods 7, which are located on the upper and lower sides of the hand crank 6. Mounting seats 10 are provided on the sides of the two drive rods 7 that are far apart from each other. The two mounting seats 10 are symmetrically arranged along the axis of the door body 1. The mounting seats 10 have slots 17. The upper slot 17 opens to the right, and the lower slot 17 opens to the right. The slot 17 opens to the left, and a slide bar 11 is slidably installed inside the slot 17. A rack 12 is connected to the side of the slide bar 11 away from the slot 17. A slide seat 9 is fixedly installed in the mounting cavity and is rotatably connected to a gear 18. There are two slide seats 9 and racks 12, which are symmetrically arranged on the upper and lower sides of the gear 18. The slide seat 9 has a groove that matches the width of the rack 12. The rack 12 is slidably connected to the slide seat 9. The two racks 12 mesh with the upper and lower sides of the gear 18. A plug block 13 is installed on the side of the rack 12 that is not connected to the slide bar 11 and is closer to the door frame 2.

[0027] In the initial state, the drive rod 7 is in a horizontal and vertical position, and the plug block 13 is inserted into the locking position in the door frame 2. At this time, the door body 1 is in a locked state. When the drive rod 7 is rotated clockwise, the drive rod 7 will drive the slide bar 11 to slide in the opposite direction in the slot 17. Since the slide bar 11 is connected to the rack 12, the rack 12 will also slide in the slide groove of the slide seat 9. Since the rack 12 is engaged with the gear 18, the gear 18 will rotate. This rotation will drive another rack 12 with the plug block 13 installed to slide towards the mounting seat 10, so that the plug block 13 slides out from the locking position in the door frame 2, thereby unlocking the door body 1.

[0028] See Figure 4As shown, a first telescopic column 16 is installed between the drive rod 7 and the slide bar 11. A first spring 15 is sleeved on the first telescopic column 16. The upper and lower ends of the first spring 15 are fixedly connected to the slide bar 11 and the drive rod 7, respectively. A horizontal square groove is opened at the bottom of the slot 17. The square groove can accommodate the first spring 15 and the first telescopic column 16 to slide horizontally. Limiting protrusions 14 are installed on both sides of the bottom of the square groove. In the specific implementation process, the drive rod 7, as an operating component, rotates to drive the entire locking mechanism. To convert the rotation of the drive rod 7 into the sliding of the slide bar 11, a first telescopic column 16 is installed between them. The first telescopic column 16 not only transmits force but also extends and retracts within a certain range to accommodate the relative movement between the drive rod 7 and the slide bar 11. The first spring 15 provides buffering for the movement of the first telescopic column 16 and utilizes its elasticity to extend the first telescopic column 16 during rotation. When the drive rod 7 rotates clockwise, it pulls the slide bar 11 to slide through the first telescopic column 16. When unlocking is required, the drive rod 7 is rotated counterclockwise, and the slide bar 11 slides in the opposite direction. The horizontal square groove at the bottom of the slot 17, which unlocks the locking mechanism, provides sliding space for the first spring 15 and the first telescopic column 16. The design of the square groove ensures that the first telescopic column 16 and the first spring 15 are not obstructed during sliding, and also ensures that their movement trajectory is horizontal and stable. The limiting protrusions 14 installed on both sides of the bottom of the square groove play a role in limiting and guiding the first telescopic column 16 and the first spring 15. They can prevent the first telescopic column 16 and the first spring 15 from disengaging from the square groove during sliding, and also ensure that they do not deviate or twist during sliding, thereby ensuring the stability and reliability of the entire locking mechanism.

[0029] See Figure 3 and Figure 4 As shown, the door frame 2 has insertion slots on both sides that match the vertical cross-section of the insertion block 13. Two racks 12, located above the gear 18, are each equipped with limiting slide bars on both sides. The slide block 9 has grooves on both sides of the slide groove that match the limiting slide bars. In practice, the insertion slots on both sides of the door frame 2 that match the vertical cross-section of the insertion block 13 ensure that when the security door is locked, the insertion block 13 can be accurately inserted into the insertion slot, thus achieving a secure connection between the door body 1 and the door frame 2, ensuring the safety of the exhibition hall. Because the slide block 9 above the gear 18 has a downward opening, the rack 12 will slide downwards. Therefore, limiting slide bars are designed to ensure its stability when sliding within the slide block 9 and prevent deviation.

[0030] See Figure 6As shown, the hand crank 6 is equipped with a locking mechanism, which includes a central column connected to the hand crank 6. One end of the central column located in the mounting cavity is fixedly connected to the drive rod 7. A collar 20 is fitted on the outer arc wall of the central column. An mounting tube 26 is installed on the front of the door body 1. A connecting block 22 is slidably installed inside the mounting tube 26. A latch 21 is installed at one end of the connecting block 22. The collar 20 has two lock holes that match the latch 21. One side of the mounting tube 26 is in a closed state. A second telescopic column 25 is connected between the closed end and the connecting block 22. A second spring 24 is fitted on the second telescopic column 25. Both ends of the second spring 24 are fixedly connected to the connecting block 22 and the mounting tube 26. A groove with a vertical cross-sectional height smaller than that of the connecting block 22 is opened on the surface of the mounting tube 26. A handle 23 is installed in the groove and is fixedly connected to the connecting block 22. In the specific implementation process, the hand crank 6 serves as the starting component of the entire locking mechanism. Its rotation will drive the central column to rotate together. The installation position of the lock hole corresponds to the rotation angle of the locking mechanism in the locked and unlocked states respectively. When the latch 21 needs to extend to lock the hand crank 6, the elastic force of the second spring 24 is used to insert the latch 21 into the lock hole of the collar 20. When unlocking is required, the user only needs to pull the handle 23. The second spring 24 will be compressed at this time, which will push the connecting block 22 and the latch 21 to retract, thereby unlocking the evacuation door.

[0031] See Figure 5 As shown, a connecting column 5 is provided above the door body 1. The connecting column 5 is close to the side where the door body 1 is hinged to the door frame 2. An arc-shaped track 3 is installed above the connecting column 5. A supporting rib 4 is connected between the arc-shaped track 3 and the top wall. An arc-shaped groove is opened in the arc-shaped track 3. A pulley 19 is installed on the top of the connecting column 5. The pulley 19 is slidably connected to the arc-shaped groove. In the specific implementation process, the connecting column 5 is close to the side where the door body 1 is hinged to the door frame 2, so that the door body 1 can move along a preset trajectory when it is opened, ensuring the stability and safety of the door body 1. The arc track 3 provides precise guidance for the movement of the air defense door. The arc track 3 is connected to the top wall by the support rib 4, which is made of galvanized angle steel. The support rib 4 not only enhances the stability of the arc track 3, but also ensures a firm connection between the arc track 3 and the wall. The arc track 3 has an arc groove, the design of which matches the movement trajectory of the air defense door, providing a smooth passage for the opening and closing of the door body 1. When the door body 1 needs to be opened, the pulley 19 will slide along the arc groove, guiding the door body 1 to move along the preset trajectory. The design of the pulley 19 not only reduces the frictional resistance of the door body 1 during the movement, but also improves the movement efficiency and stability of the door body 1.

[0032] See Figure 1 and Figure 2As shown, the front and back of door 1 are made of gypsum board. A flame-retardant board base layer is provided between the gypsum board and the installation cavity of door 1, and several reinforcing ribs 8 are provided inside the installation cavity. In the specific implementation process, gypsum board not only has a good decorative effect, but also provides certain fireproof, sound insulation and heat insulation performance. In order to further enhance the fireproof performance of door 1, a flame-retardant board base layer is specially set between the gypsum board and the installation cavity of door 1. The flame-retardant board base layer is made of a material with excellent flame-retardant properties, which can effectively prevent the spread of fire when in contact with a fire source, and protect the safety of people and property in the exhibition hall. The reinforcing ribs 8 not only play a role in reinforcing the structure of door 1, improving the overall strength and stability of door 1, but also enable door 1 to better resist deformation and damage when subjected to external impact.

[0033] Working principle:

[0034] Step 1: Door 1 is fixedly connected to the exhibition hall wall via its surrounding door frame 2. One side is hinged to the door frame 2, allowing door 1 to rotate and open around the hinge point. A hand crank 6 is installed at the center of the front of door 1, serving as the main operating component for locking and unlocking door 1. When unlocking door 1, the hand crank 6 is turned clockwise. The rotation of the hand crank 6 will cause the central column connected to it to rotate. One end of the central column located in the mounting cavity is fixedly connected to the drive rod 7, so the drive rod 7 will also rotate accordingly. Since the drive rod 7 and the slide bar 11 are connected by a first extension... The telescopic column 16 is connected to the first spring 15. When the drive rod 7 rotates, the telescopic action of the first telescopic column 16 and the first spring 15 will push the slide bar 11 to slide in the slot 17. The sliding of the slide bar 11 will drive the rack 12 connected to it to slide in the slide groove of the slide block 9. Since the rack 12 meshes with the gear 18, the gear 18 will rotate accordingly. The rotation of the gear 18 will drive another rack 12 with a plug block 13 installed to slide towards the mounting base 10, so that the plug block 13 slides out of the plug slot. At this time, the door 1 is unlocked and can be easily opened.

[0035] Step 2: To increase the stability of the lock, the hand crank 6 is also locked by a locking mechanism. The locking mechanism includes a collar 20 on the central column connected to the hand crank 6, and a latch 21 inside the mounting tube 26 installed on the front of the door body 1. When the latch 21 needs to extend to lock the hand crank 6, the elastic force of the second spring 24 is used to make the latch 21 insert into the lock hole of the collar 20. When the door body 1 needs to be unlocked, the handle 23 is pulled first to compress the second spring 24, which in turn pushes the connecting block 22 and the latch 21 to retract, thereby unlocking the hand crank 6. Then, the hand crank 6 is rotated counterclockwise, and through the same transmission principle, the plug block 13 slides out of the plug slot of the door frame 2. At this time, the door body 1 can be opened.

[0036] Step 3: Above the door body 1, there are also components such as connecting column 5 and arc track 3, which provide precise guidance and stable support for the opening of the door body 1. The connecting column 5 is close to the side where the door body 1 is hinged to the door frame 2, so that the door body 1 can move along a preset trajectory when it is opened. The arc groove opened in the arc track 3 matches the movement trajectory of the air defense door, providing a smooth passage for the opening and closing of the door body 1. The design of the pulley 19 reduces the frictional resistance of the door body 1 during the movement process, and improves the movement efficiency and stability of the door body 1.

Claims

1. A hidden civil air defense door for an exhibition hall, characterized in that, The utility model provides a door body (1), door frame (2) is installed around the door body (1), one side of door body (1) is hinged with door frame (2), the center position of the front of door body (1) is installed with hand crank (6), the inside of door body (1) is opened with installation cavity, and the inside of installation cavity is equipped with locking mechanism, locking mechanism includes drive rod (7), drive rod (7) is located the upper and lower sides of hand crank (6), the side of mutual far away of two drive rod (7) is equipped with mounting seat (10), two mounting seat (10) symmetry is arranged along the axis of door body (1), mounting seat (10) is opened with notch (17), the opening of the notch (17) in the upper side is right, the opening of the notch (17) in the lower side is left, the sliding installation of notch (17) is equipped with slide bar (11), the side of slide bar (11) away from notch (17) is connected with rack (12), the fixed installation of installation cavity is equipped with slide block (9) and is rotationally connected with gear (18), the number of slide block (9) and rack (12) is two and symmetry is arranged in the upper and lower sides of gear (18), slide block (9) is opened with the sliding slot of the width of rack (12) is matched, rack (12) is connected with slide block (9) slidingly, the upper and lower sides of two rack (12) and gear (18) are engaged, and one of rack (12) is installed with the insertion block (13) in the side of approaching door frame (2) not with the interface of slide bar (11).

2. The hidden civil defense door for exhibition hall according to claim 1, characterized in that: The first telescopic column (16) is installed between the drive rod (7) and the slide bar (11), the first telescopic column (16) is sleeved with the first spring (15), and the upper and lower ends of the first spring (15) are fixedly connected with the slide bar (11) and the drive rod (7) respectively.

3. The hidden civil defense door for exhibition hall according to claim 2, characterized in that: The bottom of the notch (17) is opened with a horizontal direction square groove, the square groove can accommodate the horizontal sliding of the first spring (15) and the first telescopic column (16), and the both sides of the bottom of the square groove are provided with limiting convex strips (14).

4. The hidden civil defense door for exhibition hall according to claim 3, characterized in that: The both sides of the two rack (12) above the gear (18) are provided with limiting slide strips, and the both sides of the sliding slot in the slide block (9) are opened with recesses matched with the limiting slide strips.

5. A concealed blast door for an exhibition hall as claimed in claim 4, characterized in that: The hand crank (6) is provided with a locking mechanism, the locking mechanism comprises a center column connected with the hand crank (6), one end of the center column in the installation cavity is fixedly connected with the drive rod (7), the outer arc wall of the center column is sleeved with a sleeve ring (20), the front of the door body (1) is provided with an installation pipe (26), the installation pipe (26) is slidably provided with a connecting block (22), one end of the connecting block (22) is provided with a lock tongue (21), the sleeve ring (20) is opened with lock holes matched with the lock tongue (21), and the number of lock holes is two.

6. A concealed blast door for an exhibition hall as claimed in claim 5, characterized in that: One side of the mounting pipe (26) is closed, and a second telescopic column (25) is connected between the closed end and the connecting block (22), the second telescopic column (25) is sleeved with a second spring (24), and the two ends of the second spring (24) are fixedly connected with the connecting block (22) and the mounting pipe (26), the surface of the mounting pipe (26) is provided with a groove with a vertical section height smaller than the connecting block (22), and a handle (23) is mounted in the groove, and the handle (23) is fixedly connected with the connecting block (22).

7. A concealed blast door for an exhibition hall as claimed in claim 6, characterized in that: The door body (1) is provided with a connecting column (5) above it, the connecting column (5) is close to the side of the door body (1) hinged with the door frame (2), an arc-shaped track (3) is installed above the connecting column (5), a supporting rib (4) is connected between the arc-shaped track (3) and the top wall surface, an arc-shaped groove is formed in the arc-shaped track (3), a pulley (19) is installed on the top of the connecting column (5), and the pulley (19) is in sliding connection with the arc-shaped groove.

8. A concealed blast door for an exhibition hall as claimed in claim 7, characterized in that: The front and back of the door body (1) are both gypsum boards, and a fire-retardant board base layer is arranged between the gypsum board and the mounting cavity of the door body (1), and a plurality of reinforcing ribs (8) are arranged in the mounting cavity.

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