A kind of civil air defense door which is easy to open

Abstract

The present invention relates to the technical field of civil air defense doors, and the present invention discloses a conveniently opened civil air defense door, comprising a door frame, an auxiliary opening and closing mechanism is arranged at the bottom of the civil air defense door panel, the auxiliary opening and closing mechanism comprises a first bevel gear, a lifting and locking mechanism is fixed at the bottom of the first bevel gear, and the lifting and locking mechanism is movably connected to the civil air defense door panel. The conveniently opened civil air defense door, the civil air defense door panel can rotate relative to the door frame, before opening and closing the civil air defense door panel, it is necessary to hold the turntable to pull the third rotating shaft and make the second bevel gear mesh with the first bevel gear and connect together, the sleeve, the connecting rod and the first piston move, the second piston and the latch move, the latch leaves the card slot and the through hole, thereby unlocking the pad support frame and the moving block, and then the pad support frame can be raised and the moving block can be lowered, the roller finally contacts the ground, in the process of opening and closing the civil air defense door panel, the roller rolls on the ground, conveniently assisting the opening and closing of the civil air defense door panel, making it more labor-saving and convenient to push and pull the civil air defense door panel.

Description

Technical Field

[0001] The present invention relates to the technical field of civil air defense doors, and in particular to a civil air defense door which is easy to open. Background Art

[0002] Civil defense doors are doors at the entrances and exits of civil defense projects. They have wartime protection functions and can be used in urban underground spaces or basements to prevent fire, theft, and smoke, protecting people's lives and property.

[0003] Existing civil air defense doors generally rely on hinge pivots for support. Since civil air defense doors are relatively heavy, they are prone to deformation after long-term use if supported solely by hinge pivots, and are not labor-saving and convenient to push and pull. To address the above problems, existing equipment needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a civil defense door that is easy to open, so as to solve the problem raised in the above background technology that the existing civil defense doors generally rely on hinges for support. Since the civil defense doors are relatively heavy, they are easily deformed after long-term use if they are only supported by hinges, and they are not labor-saving and convenient to push and pull.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a civil defense door that is easy to open, comprising a door frame, wherein two inner walls of the door frame are symmetrically rotatably connected with a first rotating shaft, the first rotating shaft is fixed to the outer side of the civil defense door panel, a door handle is fixed on the front side of the civil defense door panel, an auxiliary opening and closing mechanism is provided at the bottom of the civil defense door panel, the auxiliary opening and closing mechanism comprises a first bevel gear, a lifting and locking mechanism is fixed to the bottom of the first bevel gear, and the lifting and locking mechanism is movably connected to the civil defense door panel.

[0006] Preferably, the lifting and locking mechanism includes a second rotating shaft, and the second rotating shaft is rotatably connected to the inside of the civil defense door panel, a limiting ring, a first external thread and a second external thread are fixed to the outside of the second rotating shaft, and the limiting ring is rotatably connected to the inside of the civil defense door panel, and the direction of the first external thread is opposite to the direction of the second external thread.

[0007] By adopting the above technical solution, the second rotating shaft and the civil air defense door panel can rotate relative to the door frame, making it convenient to open and close the civil air defense door panel.

[0008] Preferably, the outer side thread of the first external thread is connected with a cushion support frame, the bottom of the civil defense door panel is provided with a first groove, the cushion support frame is slidably connected in the first groove, and a friction strip is fixed to the bottom of the cushion support frame.

[0009] By adopting the above technical solution, the cushion support frame can be used to press against the civil air defense door panel, and the friction strip can play a role in increasing friction reinforcement.

[0010] Preferably, through holes are symmetrically formed on both sides of the cushion support frame, and balls are movably connected to the bottoms of the through holes.

[0011] By adopting the above technical solution, the ball can assist the movement of the latch.

[0012] Preferably, the outer side thread of the second external thread is connected to a moving block, a second groove is provided at the bottom of the civil defense door panel, the moving block is slidably connected in the second groove, and a roller is rotatably connected to the bottom of the moving block, and card slots are symmetrically provided on both sides of the moving block.

[0013] By adopting the above technical solution, the roller can assist the opening and closing of the civil air defense door panel.

[0014] Preferably, a third rotating shaft is rotatably connected inside the civil defense door panel, and the third rotating shaft passes through the front side of the civil defense door panel and is connected to the turntable, and a second bevel gear is fixed to the rear end of the third rotating shaft.

[0015] By adopting the above technical solution, rotating the third rotating shaft can drive the second bevel gear to rotate.

[0016] Preferably, two convex rings are fixed to the outer side of the third rotating shaft, and a sleeve is rotatably connected to the outer side of the third rotating shaft, the sleeve is located between the two convex rings, and the top of the sleeve is connected to the first piston through a connecting rod.

[0017] By adopting the above technical solution, moving the third rotating shaft forward and backward can drive the sleeve, the connecting rod and the first piston to move forward and backward as a whole.

[0018] Preferably, a first airtight passage is opened in the civil defense door panel, and the first piston is slidably connected in the first airtight passage.

[0019] By adopting the above technical solution, when the first piston moves, the second piston moves.

[0020] Preferably, a second airtight channel is opened in the civil defense door panel, and the second airtight channel is connected to the first airtight channel through a connecting pipe, a second piston is slidably connected in the second airtight channel, a pin is fixed on the inner side of the second piston, and the pin passes through the through hole and is snap-connected in the slot.

[0021] By adopting the above technical solution, the latch can move together with the second piston, so as to conveniently lock or unlock the cushion support frame and the moving block.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The convenient-to-open civil air defense door can achieve the purpose of auxiliary opening and closing after unlocking by coordinating the door frame, civil air defense door panel, first bevel gear, cushion support frame, through hole, moving block, roller, card slot, third rotating shaft, turntable, second bevel gear, sleeve, connecting rod, first piston, second piston and latch. The civil air defense door panel can rotate relative to the door frame. Before opening and closing the civil air defense door panel, it is necessary to hold the turntable and pull the third rotating shaft to mesh the second bevel gear with the first bevel gear, and the sleeve, connecting rod and first piston move, and the second piston and latch move, and the latch leaves the card slot and through hole to unlock the cushion support frame and the moving block. Then the cushion support frame can be raised and the moving block can be lowered, and the roller finally contacts the ground. In the process of opening and closing the civil air defense door panel, the roller rolls on the ground, which is convenient for assisting the opening and closing of the civil air defense door panel, making it more labor-saving and convenient to push and pull the civil air defense door panel.

[0024] 2. The easy-to-open civil air defense door can achieve the purpose of tightening and locking after opening and closing through the coordinated use of the civil air defense door panel, the first bevel gear, the second rotating shaft, the pad support frame, the friction strip, the through hole, the moving block, the slot, the third rotating shaft, the turntable, the second bevel gear and the latch. After unlocking the pad support frame and the moving block, the third rotating shaft is rotated, and the first bevel gear and the second bevel gear are used in combination to drive the second rotating shaft to rotate. While the pad support frame moves up, the moving block moves down. After opening and closing the civil air defense door panel, the third rotating shaft is rotated to raise the moving block and lower the pad support frame. The pad support frame can be pressed against the civil air defense door panel, and the friction strip can increase friction. The pad support frame plays a padding role for the civil air defense door panel, which can reduce the deformation of the civil air defense door panel to a certain extent, push the turntable, and the latch passes through the through hole and is stuck in the slot, so that the pad support frame and the moving block are locked at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0027] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0028] Figure 4 It is a schematic diagram of the connection structure between the door handle and the auxiliary opening and closing mechanism of the present invention;

[0029] Figure 5 It is a schematic diagram of the connection structure of the third rotating shaft, the rotating disk, the second bevel gear, the convex ring, the sleeve and the first piston of the present invention;

[0030] Figure 6 It is a schematic diagram of the connection structure of the first bevel gear, the second rotating shaft, the limiting ring, the first external thread and the second external thread of the present invention.

[0031] In the figure: 1. door frame; 2. first rotating shaft; 3. air-defense door panel; 4. door handle; 5. auxiliary opening and closing mechanism; 501. first bevel gear; 502. lifting and locking mechanism; 5021. second rotating shaft; 5022. limiting ring; 5023. first external thread; 5024. second external thread; 503. cushion support frame; 504. first groove; 505. friction strip; 506. through hole; 507. ball; 508. moving block; 509. second groove; 510. roller; 511. slot; 512. third rotating shaft; 513. turntable; 514. second bevel gear; 515. convex ring; 516. sleeve; 517. connecting rod; 518. first airtight passage; 519. first piston; 520. connecting pipe; 521. second airtight passage; 522. second piston; 523. latch. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 6 The present invention provides a technical solution: a civil defense door that is easy to open, including a door frame 1, and a first rotating shaft 2 is symmetrically rotatably connected on the two inner walls of the door frame 1, the first rotating shaft 2 is fixed to the outside of the civil defense door panel 3, and a door handle 4 is fixed on the front side of the civil defense door panel 3. An auxiliary opening and closing mechanism 5 is arranged at the bottom of the civil defense door panel 3, and the auxiliary opening and closing mechanism 5 includes a first bevel gear 501. A lifting and locking mechanism 502 is fixed to the bottom of the first bevel gear 501, and the lifting and locking mechanism 502 is movably connected to the civil defense door panel 3.

[0034] In this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the lifting and locking mechanism 502 includes a second rotating shaft 5021, and the second rotating shaft 5021 is rotatably connected to the inside of the civil defense door panel 3. A limiting ring 5022, a first external thread 5023 and a second external thread 5024 are fixed to the outside of the second rotating shaft 5021, and the limiting ring 5022 is rotatably connected to the inside of the civil defense door panel 3. The direction of the first external thread 5023 is opposite to the direction of the second external thread 5024. The limiting ring 5022 plays a limiting role during the rotation of the second rotating shaft 5021.

[0035] In this embodiment, Figure 2 , Figure 3 and Figure 4As shown, the outer thread of the first external thread 5023 is connected to a pad support frame 503, and a first groove 504 is opened at the bottom of the civil defense door panel 3. The pad support frame 503 is slidably connected in the first groove 504, and a friction strip 505 is fixed to the bottom of the pad support frame 503. When the second rotating shaft 5021 rotates, the pad support frame 503 can slide up or down under the limiting action of the first external thread 5023 and the first groove 504, which is convenient for using or retracting the pad support frame 503. When the pad support frame 503 is lowered and pressed against the ground, the friction strip 505 can increase the friction between the pad support frame 503 and the ground, so that the pad support frame 503 can be more firmly pressed against the civil defense door panel 3.

[0036] In this embodiment, Figure 2 and Figure 3 As shown, through holes 506 are symmetrically opened on both sides of the cushion frame 503, and a ball 507 is movably connected to the bottom of the through hole 506. Before moving the cushion frame 503 up and down, the cushion frame 503 needs to be unlocked, and after moving the cushion frame 503 up and down, the cushion frame 503 can be locked.

[0037] In this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the outer thread of the second external thread 5024 is connected to a moving block 508, and a second groove 509 is provided at the bottom of the civil defense door panel 3. The moving block 508 is slidably connected in the second groove 509, and the bottom of the moving block 508 is rotatably connected to a roller 510. Slots 511 are symmetrically provided on both sides of the moving block 508. When the second rotating shaft 5021 rotates, the moving block 508 can slide up or down under the limiting action of the second external thread 5024 and the second groove 509, which is convenient for using or retracting the roller 510. When the moving block 508 is lowered and the roller 510 contacts the ground, the roller 510 can assist the rotation of the civil defense door panel 3.

[0038] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a third rotating shaft 512 is rotatably connected inside the civil defense door panel 3, and the third rotating shaft 512 passes through the front side of the civil defense door panel 3 and is connected to the turntable 513. A second bevel gear 514 is fixed to the rear end of the third rotating shaft 512. When the turntable 513 is held and the third rotating shaft 512 is rotated, the second bevel gear 514 can rotate with the rotation of the third rotating shaft 512.

[0039] In this embodiment, Figure 4 and Figure 5As shown, two convex rings 515 are fixed to the outer side of the third rotating shaft 512, and the outer side of the third rotating shaft 512 is rotatably connected with a sleeve 516, the sleeve 516 is located between the two convex rings 515, and the top of the sleeve 516 is connected to the first piston 519 through a connecting rod 517. When the third rotating shaft 512 rotates relative to the sleeve 516, the two convex rings 515 limit the sleeve 516. When the third rotating shaft 512 moves forward and backward, it can drive the sleeve 516 to move forward and backward, thereby driving the connecting rod 517 and the first piston 519 to move forward and backward as a whole.

[0040] In this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a first airtight channel 518 is opened in the civil defense door panel 3, and the first piston 519 is slidably connected in the first airtight channel 518. When the third rotating shaft 512 moves forward or backward, the sleeve 516, the connecting rod 517 and the first piston 519 can move forward or backward as a whole.

[0041] In this embodiment, Figure 2 and Figure 3 As shown, a second airtight channel 521 is opened in the civil defense door panel 3, and the second airtight channel 521 is connected to the first airtight channel 518 through a connecting pipe 520, and a second piston 522 is slidably connected in the second airtight channel 521, and a latch 523 is fixed on the inner side of the second piston 522, and the latch 523 passes through the through hole 506 and is snap-connected in the slot 511, and the connecting pipe 520 serves to connect the second airtight channel 521 with the first airtight channel 518. When the first piston 519 slides in the first airtight channel 518, the second piston 522 can slide under the action of pneumatics, thereby driving the latch 523 to move. When the latch 523 passes through the through hole 506 and is snap-connected in the slot 511, the cushion support frame 503 and the moving block 508 can be locked at the same time, and the latch 523 can unlock the cushion support frame 503 and the moving block 508 after leaving the slot 511 and the through hole 506.

[0042] The use method and advantages of the present invention: The working process of the conveniently opened civil air defense door is as follows:

[0043] like Figures 1 to 6As shown: before rotating to open or close the civil defense door panel 3, it is necessary to hold the turntable 513 and pull the third rotating shaft 512, the sleeve 516, the connecting rod 517 and the first piston 519 move forward as a whole, the second piston 522 moves under the action of pneumatics, and the pin 523 leaves the through hole 506 and the slot 511, thereby unlocking the cushion frame 503 and the moving block 508, and the second bevel gear 514 is meshed and connected with the first bevel gear 501, and the turntable 513 is held to rotate the third rotating shaft 512, and the second bevel gear 514 rotates, thereby driving the first bevel gear 501 to rotate, the second rotating shaft 5021, the limiting ring 5022, the first external thread 5023 and the second external thread 5024 rotate as a whole, and the cushion frame 503 moves up and leaves the ground, while the moving block 508 and the roller 510 move down and contact the ground. 4, and then hold the door handle 4 to push and pull the civil defense door panel 3 to open or close the civil defense door panel 3. After opening or closing the civil defense door panel 3, reverse the turntable 513, and the moving block 508 and the roller 510 move up and leave the ground, while the cushion frame 503 moves down and presses against the ground to firmly fix the civil defense door panel 3. The friction strip 505 can increase the friction. Then push the turntable 513 and the third rotating shaft 512 to make the second bevel gear 514 leave the first bevel gear 501, and the first piston 519 moves backward, and the second piston 522 and the latch 523 move. The latch 523 passes through the corresponding through hole 506 and is inserted into the corresponding slot 511, thereby locking the cushion frame 503 and the moving block 508 at the same time. When the latch 523 moves left and right, the ball 507 rolls to facilitate the movement of the auxiliary latch 523.

[0044] To sum up, the easy-to-open civil defense door achieves the purpose of auxiliary opening and closing after unlocking, tightening and locking after opening and closing, and meets people's usage needs.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

[0046] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A conveniently opened civil air defense door, comprising a door frame (1), characterized in that: The two inner walls of the door frame (1) are symmetrically connected to a first rotating shaft (2), the first rotating shaft (2) is fixed to the outside of the civil air defense door panel (3), a door handle (4) is fixed to the front side of the civil air defense door panel (3), an auxiliary opening and closing mechanism (5) is arranged at the bottom of the civil air defense door panel (3), the auxiliary opening and closing mechanism (5) comprises a first bevel gear (501), a lifting and locking mechanism (502) is fixed to the bottom of the first bevel gear (501), the lifting and locking mechanism (502) is movably connected to the civil air defense door panel (3), the lifting and locking mechanism (502) comprises a second rotating shaft (5021), and the second rotating shaft (5021) is rotatably connected to the inside of the civil air defense door panel (3), the second rotating shaft (5021) ), a limiting ring (5022), a first external thread (5023) and a second external thread (5024) are fixed on the outer side of the civil air defense door panel (3), and the limiting ring (5022) is rotatably connected to the inside of the civil air defense door panel (3), the direction of the first external thread (5023) is opposite to the direction of the second external thread (5024), the outer thread of the first external thread (5023) is threadedly connected to a cushion support frame (503), a first groove (504) is provided at the bottom of the civil air defense door panel (3), the cushion support frame (503) is slidably connected in the first groove (504), and a friction strip (505) is fixed to the bottom of the cushion support frame (503), through holes (506) are symmetrically provided on both sides of the cushion support frame (503), and the bottom of the through holes (506) is movable A ball (507) is connected, the outer side thread of the second external thread (5024) is connected to a moving block (508), a second groove (509) is provided at the bottom of the civil air defense door panel (3), the moving block (508) is slidably connected in the second groove (509), and the bottom of the moving block (508) is rotatably connected to a roller (510), and slots (511) are symmetrically provided on both sides of the moving block (508), a third rotating shaft (512) is rotatably connected inside the civil air defense door panel (3), and the third rotating shaft (512) passes through the front side of the civil air defense door panel (3) and is connected to the turntable (513), a second bevel gear (514) is fixed to the rear end of the third rotating shaft (512), and the outer side of the third rotating shaft (512) is provided with a plurality of gears (514) and a plurality of gears (514) are provided on the inner side of the civil air defense door panel (3). Two convex rings (515) are fixed on the side, and a sleeve (516) is rotatably connected to the outer side of the third rotating shaft (512), the sleeve (516) is located between the two convex rings (515), and the top of the sleeve (516) is connected to the first piston (519) through a connecting rod (517), a first airtight channel (518) is opened in the civil defense door panel (3), the first piston (519) is slidably connected in the first airtight channel (518), a second airtight channel (521) is opened in the civil defense door panel (3), and the second airtight channel (521) is connected to the first airtight channel (518) through a connecting pipe (520), and a second piston (522) is slidably connected in the second airtight channel (521),A latch pin (523) is fixed to the inner side of the second piston (522), and the latch pin (523) passes through the through hole (506) and is engaged in the slot (511).

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