CN114658327B

CN114658327B - Folding vertical hinged door with self-locking function

Info

Publication number: CN114658327B
Application number: CN202210333222.XA
Authority: CN
Inventors: 罗超; 王岳
Original assignee: Shenzhen Pason Aluminium S&t Co ltd
Current assignee: Shenzhen Pason Aluminium S&t Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-11-11
Anticipated expiration: 2042-03-30
Also published as: CN114658327A

Abstract

The invention discloses a folding vertical hinged door with a self-locking function, which comprises a door frame, wherein a plurality of foldable or unfoldable door leaves are arranged in the door frame, the folding vertical hinged door also comprises a locking mechanism, the locking mechanism comprises a square pipe, cavities are arranged inside the door leaves, the square pipe is arranged in the cavities and connects the door leaves in series, the inner wall of the square pipe positioned inside each door leaf is provided with a magnetic block in a sliding manner, the outer wall of each magnetic block facing the door opening direction is fixed with an inserted bar, and the inner wall of the door frame is provided with a slot for the inserted bar to penetrate. According to the invention, through the matching of the structures, the door leaf is locked by utilizing the rigidity of the inserted rod, so that the door leaf is connected into a combined plate with higher strength than before, the door leaf can be prevented from being damaged under the action of external force, the strength and the safety of the folded vertical hinged door after being closed are improved, and the anti-theft effect is improved.

Description

Folding vertical hinged door with self-locking function

Technical Field

The invention relates to the technical field of folding vertical hinged doors, in particular to a folding vertical hinged door with a self-locking function.

Background

The folding door is a furniture term, is mainly suitable for places such as workshops, markets, office buildings, family decorations and the like, and plays a role of a partition or a screen, thereby playing roles of heat insulation, dust prevention, noise reduction, shielding and the like.

Folding vertical hinged door mainly comprises door frame, door leaf, drive assembly, rocking arm part isotructure, and is applicable in indoor and outdoor, and current folding door is closing the back, and the hinge structure between the two adjacent door bodies can't be closed completely to can't be connected between with the door frame, make vertical hinged door only be connected with the door frame through the articulated piece of lock and one side, its intensity is relatively poor, causes destruction easily under the effect that receives the external force, and the security is lower.

Disclosure of Invention

The invention aims to provide a folding vertical hinged door with a self-locking function, which has the advantages that the rigidity of an inserted rod is utilized to play a role in locking door leaves, and the door leaves are connected into a combined plate with higher strength than before, so that the door leaves can be prevented from being damaged under the action of external force, the strength and the safety of the folding vertical hinged door after being closed are improved, the anti-theft effect is improved, and the problems in the background art are solved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a folding vertical hinged door with self-locking function, includes the door frame, install a plurality of collapsible or expandes door leaves in the door frame, still include locking mechanical system, locking mechanical system includes square pipe, and is a plurality of the cavity has all been seted up to the inside of door leaf, square pipe is installed in the cavity, and will be a plurality of establish ties between the door leaf, is located every the equal slidable mounting of the square intraductal wall of door leaf has the magnetic path, every the outer wall of magnetic path orientation direction of opening the door all is fixed with the inserted bar, the slot that can supply the inserted bar to penetrate is seted up to the inner wall of door frame.

The door leaf folding device is characterized by further comprising a transmission assembly for driving the magnetic blocks to slide on the inner wall of the square tube in a reciprocating mode, when the door leaves are unfolded, the transmission assembly can drive the magnetic blocks to move towards the direction close to the slots, one of the inserting rods is inserted into the slot, and the two ends of the rest of the inserting rods are located in two adjacent door leaves respectively.

Preferably, the transmission assembly is including keeping away from the inside of slot and carrying out the aerated breather pipe to square pipe, be located every the inside square intraductal wall of door leaf all is fixed with the connecting piece, every the connecting piece all is located adjacently one side that the slot was kept away from to the magnetic path, and every all be connected with the extension spring between connecting piece and the adjacent magnetic path, the outer wall intercommunication that square pipe is close to the breather pipe has the pressure release subassembly that can carry out the gassing to square pipe.

Preferably, the outer wall of door frame is fixed with the piston pipe, the vertical slidable mounting of inner wall of piston pipe has the dog, be connected with the spring between the interior top of dog and piston pipe, the breather pipe is kept away from the one end intercommunication of square pipe at the piston pipe outer wall, and works as when the spring is in relaxed state, the dog seals the intercommunication mouth of breather pipe, but vertical slip's spline housing is installed to the inner wall of piston pipe, the top of spline housing is fixed with the ejector pin, when the door leaf expandes, the spline housing can the lapse, works as after the door leaf expandes and is the plane, the ejector pin can push against the dog lapse and open the intercommunication mouth of breather pipe, the one-way inlet port that can admit air to in the piston pipe is seted up to the inside of spline housing.

Preferably, the helicla flute has been seted up to the inner wall of piston tube, the outer wall of spline housing is fixed with the stopper of slidable mounting at the helicla flute inner wall, with the door leaf outer wall that the door frame is connected is fixed with the mount pad, just the piston tube is located the outer wall that the door frame is close to the mount pad, the top of mount pad is fixed with the integral key shaft, the spline groove has been seted up to the inside of spline housing, the top of integral key shaft inserts in the spline groove, and with spline groove sliding connection, work as can drive the spline housing through the integral key shaft when the door leaf expandes and make the spline housing upwards slide under the sliding fit of stopper and helicla flute.

Preferably, the pressure release subassembly is including seting up at the hidden groove of door leaf outer wall, the inner wall in hidden groove is fixed with the scavenge pipe, communicate through communicating pipe between scavenge pipe and the side pipe, but vertical sliding's piston is installed to the inner wall of scavenge pipe, the air vent with external intercommunication is seted up to the outer wall of scavenge pipe, the door leaf is under the expansion state, the piston is sealed the air vent.

Preferably, a cylinder is slidably mounted on an inner wall of the ventilation tube, the cylinder can rotate in the ventilation tube, the cylinder is rotatably connected with the piston, a limiting groove is formed in an outer wall of the cylinder, a sliding block slidably mounted in the limiting groove is fixed on the inner wall of the ventilation tube, the limiting groove comprises two transverse grooves and an inclined groove which are communicated with each other, the inclined groove is located between the two transverse grooves, a rotating rod is fixed on an outer wall of the cylinder, which is far away from the piston, and a handle is fixed at one end of the rotating rod, which penetrates out of the ventilation tube.

Preferably, the outer wall in the middle of the door leaf is provided with a mounting groove, an iron block is fixed in the mounting groove, a groove for the iron block to penetrate is formed in the outer wall of the door leaf, the iron block can be inserted into the groove when the door leaf is folded, and the two adjacent magnetic blocks in the door leaf are adsorbed at two ends of the iron block.

Preferably, the inner wall of the middle section of the square tube between two adjacent door leaves is thickened, and the diameter of the inserting rod is the same as the inner diameter of the thickened part of the square tube.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, through the matching of the structures, the door leaf is locked by utilizing the rigidity of the inserted rod, so that the door leaf is connected into a combined plate with higher strength than before, the door leaf can be prevented from being damaged under the action of external force, the strength and the safety of the folded vertical hinged door after being closed are improved, and the anti-theft effect is improved.

Drawings

FIG. 1 is a schematic structural view of a front view of the door of the present invention after closing;

FIG. 2 is a schematic perspective view of FIG. 1 according to the present invention;

FIG. 3 is a schematic left side view of the present invention;

FIG. 4 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 3 in accordance with the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 4 at B;

FIG. 6 is a rear view structural schematic of the present invention;

FIG. 7 is a schematic perspective view of the door leaf of the present invention after closing;

FIG. 8 is an enlarged cross-sectional structural view of a ventilation tube of the present invention;

FIG. 9 is an enlarged view of the cylinder of the present invention;

FIG. 10 is a schematic top view of the door leaf of the present invention;

FIG. 11 is a right side view of the door of the present invention;

FIG. 12 is a schematic cross-sectional view taken along line C-C of FIG. 11 in accordance with the present invention;

FIG. 13 is an enlarged view of FIG. 12 at D;

FIG. 14 is a perspective view of a door frame according to the present invention;

fig. 15 is a state view of the door leaf of the present invention during the folding process;

FIG. 16 is a view showing the door of the present invention folded;

FIG. 17 is a schematic diagram of the magnetic block of the present invention in a state of being attracted to a magnet.

In the figure: 1. a door frame; 2. a door leaf; 3. a slot; 4. a piston tube; 5. a mounting seat; 6. a ventilation tube; 7. hiding the groove; 8. an iron block; 9. a groove; 10. a spline shaft; 11. a spline housing; 12. a top rod; 13. a stopper; 14. a spring; 15. a breather pipe; 16. a helical groove; 17. a cylinder; 18. a limiting groove; 19. a slider; 20. a piston; 21. a rotating rod; 22. a chute; 23. a transverse groove; 24. a square tube; 25. a connecting member; 26. a tension spring; 27. a magnetic block; 28. inserting a rod; 29. and (4) a vent hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment;

referring to fig. 1 to 17, the present invention provides a technical solution: the utility model provides a folding vertical hinged door with self-locking function, including door frame 1, install a plurality of collapsible or door leaf 2 that expand in the door frame 1, still include locking mechanical system, locking mechanical system includes square pipe 24, the cavity has all been seted up to the inside of a plurality of door leaves 2, square pipe 24 is installed in the cavity, and establish ties between a plurality of door leaves 2, the equal slidable mounting of square pipe 24 inner wall that is located every door leaf 2 inside has magnetic path 27, every magnetic path 27 all is fixed with inserted bar 28 towards the outer wall of the direction of opening the door, slot 3 that can supply inserted bar 28 to penetrate is seted up to door frame 1's inner wall.

The door leaf folding device further comprises a transmission assembly for driving the magnetic block 27 to slide on the inner wall of the square tube 24 in a reciprocating mode, when the door leaves 2 are unfolded, the transmission assembly can drive the magnetic block 27 to move towards the direction close to the slot 3, one of the inserting rods 28 is inserted into the slot 3, and two ends of the other inserting rods 28 are located in two adjacent door leaves 2 respectively.

The door leaf 2 can be unfolded, closed or folded and opened in a manual or electric mode, and the technical personnel in the field can easily realize the unfolding and folding of the door leaf 2, and the unfolding and folding of the door leaf can be realized in this embodiment without repeated description, and the door leaf 2 connected with the door frame 1 is arranged, and the unfolding and folding of the door leaf 2, the middle door leaf 2 and the side door leaf 2 are sequentially connected.

When closing the door, door leaf 2 expandes and closes the back, drive assembly can drive magnetic path 27 and slide in square pipe 24, then inserted bar 28 among the limit door leaf 2 can stretch out square pipe 24, and insert in the slot 3 of seting up on the door frame 1, connect the inserted bar 28 among door leaf 2 and the middle door leaf 2 simultaneously and can insert among the square pipe 24 in the adjacent door leaf 2, can refer to figure 12, figure 12 is the state after door leaf 2 expandes, utilize the rigidity of inserted bar 28 to play the effect of locking to door leaf 2, make door leaf 2 connect into the higher compoboard before the intensity compares, thereby can prevent to receive under the exogenic action, cause destruction to door leaf 2, intensity and security after having improved folding flat-open door and closing, improve the theftproof effect.

When the door is opened, the magnetic block 27 is driven to reset through the transmission assembly, the corresponding inserted rods 28 in the door leaf 2 move back to the corresponding square tubes 24, and at the moment, the door leaf 2 is unlocked and then folded.

The locking mechanism can be arranged on the upper side and the lower side of the door leaf 2, so that the locking is more stable.

Further, the transmission assembly comprises a vent pipe 15 capable of inflating towards the inside of the square pipe 24 away from the slot 3, a connecting piece 25 is fixed on the inner wall of the square pipe 24 inside each door leaf 2, each connecting piece 25 is located on one side of each adjacent magnetic block 27 away from the slot 3, a tension spring 26 is connected between each connecting piece 25 and each adjacent magnetic block 27, and the outer wall of the square pipe 24 close to the vent pipe 15 is communicated with a pressure relief assembly capable of deflating the square pipe 24.

Aerify in 24 square pipes through breather pipe 15, outside air supply equipment can be connected to breather pipe 15, refer to fig. 12, the back is aerifyd to the intracavity on the right side of 24 square pipes, atmospheric pressure can the grow, thereby push up magnetic path 27 and move left, extension spring 26 is tensile simultaneously, meanwhile, magnetic path 27 backward can be along with the removal of first magnetic path 27 and push away the removal together under the effect of atmospheric pressure, it can drive all magnetic paths 27 and slide together to aerify through the intracavity on the right side of 24 square pipes like this, thereby drive inserted bar 28 and remove and lock.

When the door is opened, the square tube 24 is deflated through the pressure relief assembly, the air pressure in the square tube 24 is reduced, and the magnet 27 can reset under the action of the tension spring 26, so that the inserted rod 28 resets and the locking is released.

Further, the outer wall of door frame 1 is fixed with piston tube 4, the vertical slidable mounting of inner wall of piston tube 4 has dog 13, be connected with spring 14 between the interior top of dog 13 and piston tube 4, the one end intercommunication that square pipe 24 was kept away from to breather pipe 15 is at piston tube 4 outer wall, and when spring 14 was in the state of relaxing, dog 13 seals the intercommunication mouth of breather pipe 15, but vertical gliding spline housing 11 is installed to the inner wall of piston tube 4, the top of spline housing 11 is fixed with ejector pin 12, when door leaf 2 expandes, spline housing 11 can the lapse, after door leaf 2 expandes and is the plane, ejector pin 12 can push up dog 13 lapse and open the intercommunication mouth of breather pipe 15, the one-way inlet port that can admit air in to piston tube 4 is seted up to the inside of spline housing 11.

When the door is closed, the door leaf 2 can rotate and unfold from a folded state, refer to fig. 15 and 16, fig. 16 is a folded state of the door leaf 2, when the door leaf 2 rotates and unfolds, the spline housing 11 drives the door leaf to slide upwards through an external structure, meanwhile, air in the piston tube 4 is compressed, air pressure is increased, when the door leaf 2 unfolds to the same plane, the ejector rod 12 can push against the stop block 13 to slide upwards, a communication port of the vent tube 15 is opened, at the moment, high-pressure air in the piston tube 4 can be filled into the square tube 24, and the previous contents show that locking can be carried out between the adjacent door leaves 2 and between the door leaf 2 and the door frame 1 through matching between the structures.

When opening the door, through pressure release subassembly gassing and unblock back, door leaf 2 rotates foldingly this moment, and spline housing 11 can the lapse under the drive of external mechanism, and ejector pin 12 breaks away from dog 13 back, and under spring 14's spring action, dog 13 seals the intercommunication mouth of breather pipe 15 once more, along with spline housing 11 lapse, can be through the inside one-way inlet port of seting up of spline housing 11 to the interior air of rebreathing of piston tube 4.

Adopt manual mode to open the door, known from the preceding content, door leaf 2 is when rotating folding and opening, 11 glidings of spline housing, can be through the one-way inlet port that 11 inside setings of spline housing to the interior air that inhales again of piston pipe 4, through setting up the admission speed of one-way inlet port, like this when door leaf 2 rotates too fast can make 11 downshifts of spline housing too fast, and the admission speed of one-way inlet port is slower, thereby can produce the negative pressure of certain degree in making the piston pipe 4, can restrict 11 the speed that moves down of spline housing through the negative pressure, thereby further play the slew velocity of restriction door leaf 2, when adopting manual mode to open the door like this, can play the effect of rotation buffering to door leaf 2, thereby prevent that 2 slew velocity of rotation of door leaf is too fast and cause the striking damage.

Further, helicla flute 16 has been seted up to the inner wall of piston pipe 4, spline housing 11's outer wall is fixed with the stopper of slidable mounting at helicla flute 16 inner wall, 2 outer walls of door leaf that are connected with door frame 1 are fixed with mount pad 5, and piston pipe 4 is located door frame 1 and is close to the outer wall of mount pad 5, mount pad 5's top is fixed with integral key shaft 10, the spline groove has been seted up to spline housing 11's inside, insert the spline inslot on integral key shaft 10's top, and with spline groove sliding connection, can drive spline housing 11 at piston pipe 4 internal rotations through integral key shaft 10 when door leaf 2 expandes, and make spline housing 11 upwards slide under stopper and helicla flute 16's sliding fit.

When closing the door, door leaf 2 rotates and can drive integral key shaft 10 through mount pad 5 and rotate to drive spline housing 11 and rotate together, can refer to fig. 4 and fig. 5, make spline housing 11 upwards slide under the sliding fit of stopper and helicla flute 16 simultaneously, thereby reach the purpose of aerifing in square pipe 24.

Conversely, when the door is opened, the door leaf 2 rotates reversely, so that the spline housing 11 rotates and slides downwards.

Therefore, the purposes of inflation locking and air supply of the piston tube 4 can be achieved by rotating and unfolding or folding the door leaf 2.

And among present prior art, between door leaf 2 and the door leaf 2, all be connected through the hinge between door leaf 2 and the door frame 1, piston pipe 4 can set up with the pivot of hinge is coaxial when the installation, and door leaf 2 can drive integral key shaft 10 through mount pad 5 when rotating like this and rotate along the axis of piston pipe 4, prevents that it from causing the motion to interfere because the axis does not coincide.

Since the communication part of the ventilation pipe 15 can be opened only when the push rod 12 contacts and pushes the stopper 13 to move upward, if the door 2 needs to be completely unfolded when the door is closed manually, the push rod 12 can contact and push the stopper 13 to move upward.

If the door leaf 2 is closed vigorously by inertia, the spline housing 11 cannot be moved upwards by the rotation of the door leaf 2 for a sufficient distance, so that the ejector rod 12 contacts and pushes against the stop block 13 to move upwards, the air in the piston tube 4 is compressed, then after the door leaf 2 stops rotating, the high pressure in the piston tube 4 pushes against the spline housing 11 to move downwards, and the spline shaft 10 is driven to rotate under the sliding fit of the stop block and the spiral groove 16, so that the door leaf 2 rotates and is opened again, the door leaf 2 can be prevented from being damaged due to collision when the door leaf 2 is closed vigorously, and meanwhile, the door leaf 2 can be opened again, so that a user can normally close the door.

Further, the pressure release subassembly is including offering the hidden groove 7 at the 2 outer walls of door leaf, and the inner wall of hiding groove 7 is fixed with the scavenge pipe 6, and through communicating pipe intercommunication between scavenge pipe 6 and the side pipe 24, but vertical sliding's piston 20 is installed to the inner wall of scavenge pipe 6, and the air vent 29 with external intercommunication is seted up to the outer wall of scavenge pipe 6, and door leaf 2 is under the expansion state, and piston 20 seals air vent 29.

When the door is opened, the piston 20 is driven to move downwards through an external mechanism, the vent hole 29 is opened, referring to fig. 8, then air in the square pipe 24 can be discharged from the vent hole 29 through the communicating pipe and the ventilation pipe 6, air bleeding and pressure relief are carried out until the air pressure in the square pipe 24 is the same as the outside, the magnetic block 27 can complete resetting, and after air bleeding is finished, the piston 20 is driven to move upwards through the external mechanism, and the vent hole 29 is closed again.

Further, the inner wall slidable mounting of scavenge pipe 6 has cylinder 17, and cylinder 17 can rotate at scavenge pipe 6, rotate between cylinder 17 and the piston 20 and be connected, spacing groove 18 has been seted up to cylinder 17's outer wall, the inner wall of scavenge pipe 6 is fixed with slider 19 of slidable mounting in spacing groove 18, spacing groove 18 includes two cross slots 23 and the chute 22 that communicate each other, and chute 22 is located between two cross slots 23, the outer wall that piston 20 was kept away from to cylinder 17 is fixed with bull stick 21, the one end that bull stick 21 wore out scavenge pipe 6 is fixed with the handle.

Referring to fig. 8, the rotating rod 21 is rotated by rotating the handle, so as to rotate the cylinder 17, and the sliding fit between the sliding block 19 and the inclined groove 22 causes the cylinder 17 to rotate and move downward, and causes the piston 20 to move downward, otherwise, the cylinder 17 moves upward when rotating in the opposite direction.

The cylinder 17 can be kept in a static state after being reset by the cooperation between the transverse groove 23 and the slide block 19, and the air pressure in the ventilation pipe 6 is prevented from extruding the cylinder 17 to move downwards.

Further, the mounting groove has been seted up to the outer wall in the middle of door leaf 2, and the mounting groove internal fixation has iron plate 8, and the recess 9 that can supply iron plate 8 to penetrate is seted up to the outer wall of adjacent door leaf 2, and when door leaf 2 was folding, iron plate 8 can insert in the recess 9, and the magnetic path 27 in two adjacent door leaves 2 adsorbs at the both ends of iron plate 8.

When opening the door, can be in the same place each other the laminating between the adjacent door leaf 2, can refer to fig. 16, this moment iron plate 8 can penetrate in the recess 9 that adjacent door leaf 2 outer wall was seted up, and because magnetic path 27 all is in the recovering state this moment, so magnetic path 27 in two adjacent door leaves 2 can adsorb the both ends at iron plate 8, can refer to fig. 17, fig. 17 is the structure sketch of magnetic path 27 adsorption on iron plate 8, like this through magnetic path 27's adsorption, can make and play fixed effect between the folding door leaf 2, prevent that it from receiving the effect of external force and leading to it to rock or unstable.

Then, when the door is closed, when the vent pipe 15 inflates air into the square pipe 24, the magnetic blocks 27 move, and the magnetic blocks 27 at two ends of the same iron block 8 move in a staggered manner, so that the magnetic blocks 27 and the iron block 8 are separated from each other, and the door leaf 2 is unlocked and unfolded.

When the magnetic block 27 and the iron block 8 are attracted, the magnetic block 27 is difficult to be separated from each other by overcoming the action of magnetic force along the directions of the iron block 8 and the magnetic block 27, so that the attraction locking effect can be achieved, and the iron block 8 and the magnetic block 27 can be well separated from each other if the iron block 8 and the magnetic block 27 move in a staggered manner along the tangential direction, so that the separation unlocking can be conveniently carried out on the iron block.

Further, the inner wall of the middle section of the square tube 24 between two adjacent door leaves 2 is thickened, and the diameter of the inserted bar 28 is the same as the inner diameter of the thickened part of the square tube 24.

Since the square tube 24 between two adjacent door leaves 2 is exposed after the door leaves 2 are folded, as shown in fig. 15 and 16, the inner wall is thickened to improve the service life and to make the door leaves resistant to bending.

And the diameter of the inserted link 28 is the same as the internal diameter of the thickened part of the square tube 24, refer to fig. 13, so that the inserted link 28 can be more attached after being inserted, the stability of the inserted link is improved, and the diameter of the inserted link 28 can be reduced, so that the inserted link 28 can not be in contact with the inner wall of the square tube 24, only the magnetic block 27 is in contact, and the friction resistance of the magnetic block 27 during sliding is reduced.

In summary, the first embodiment is a one-way folding vertical hinged door, and the self-locking function can be realized after the first embodiment is unfolded or folded.

Example two;

the same as the scheme of the embodiment, can also form the vertical hinged door of two-way folding opening through setting up the door leaf 2 symmetry in the embodiment to slot 3 is seted up at 2 outer walls of relative door leaf, and the door leaf 2 on both sides can carry out two-way locking like this after expanding.

The standard parts used in the present embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification and drawings can also be obtained by processing directly according to the prior art knowledge without any doubt, and the connection mode of the parts adopts the conventional means mature in the prior art, and the machines, parts and equipment adopt the conventional models in the prior art, so that the detailed description is not given here.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a folding vertical hinged door with self-locking function, includes door frame (1), install a plurality of collapsible or door leaf (2) that expand in door frame (1), its characterized in that: the door is characterized by further comprising a locking mechanism, wherein the locking mechanism comprises a square pipe (24), a cavity is formed in each of the door leaves (2), the square pipe (24) is installed in the cavity and connected in series with the door leaves (2), a magnetic block (27) is installed on the inner wall of each square pipe (24) in each door leaf (2) in a sliding mode, an inserting rod (28) is fixed on the outer wall, facing the door opening direction, of each magnetic block (27), and an inserting groove (3) for the inserting rod (28) to penetrate through is formed in the inner wall of the door frame (1);

the door leaf folding mechanism is characterized by further comprising a transmission assembly for driving the magnetic blocks (27) to slide on the inner wall of the square tube (24) in a reciprocating mode, when the door leaves (2) are unfolded, the transmission assembly can drive the magnetic blocks (27) to move towards the direction close to the slot (3), one of the inserted rods (28) is inserted into the slot (3), and two ends of the rest of the inserted rods (28) are located in two adjacent door leaves (2) respectively;

the transmission assembly comprises a vent pipe (15) capable of inflating towards the inner part, far away from the slot (3), of the square pipe (24), a connecting piece (25) is fixed on the inner wall of the square pipe (24) positioned in each door leaf (2), each connecting piece (25) is positioned on one side, far away from the slot (3), of the adjacent magnetic block (27), a tension spring (26) is connected between each connecting piece (25) and the adjacent magnetic block (27), and the outer wall, close to the vent pipe (15), of the square pipe (24) is communicated with a pressure relief assembly capable of deflating the square pipe (24);

the outer wall of door frame (1) is fixed with piston pipe (4), the vertical slidable mounting of inner wall of piston pipe (4) has dog (13), be connected with spring (14) between the interior top of dog (13) and piston pipe (4), the one end intercommunication that square pipe (24) were kept away from in breather pipe (15) is at piston pipe (4) outer wall, and works as when spring (14) are in relaxed state, dog (13) seal the intercommunication mouth of breather pipe (15), but piston pipe's (4) inner wall is installed vertical sliding spline housing (11), the top of spline housing (11) is fixed with ejector pin (12), when door leaf (2) expand, spline housing (11) can the lapse, works as behind expansion of door leaf (2) is the plane, ejector pin (12) can push against dog (13) the lapse and open the intercommunication mouth of breather pipe (15), the one-way inlet port that can admit air to piston pipe (4) interior is seted up to the inside of spline housing (11).

2. The folding vertical hinged door with self-locking function of claim 1, characterized in that: the inner wall of the piston tube (4) is provided with a spiral groove (16), the outer wall of the spline sleeve (11) is fixedly provided with a limiting block which is slidably mounted on the inner wall of the spiral groove (16), the outer wall of the door leaf (2) connected with the door frame (1) is fixedly provided with a mounting seat (5), the piston tube (4) is located on the outer wall, close to the mounting seat (5), of the door frame (1), the top of the mounting seat (5) is fixedly provided with a spline shaft (10), the spline groove is formed in the spline sleeve (11), the top end of the spline shaft (10) is inserted into the spline groove and is slidably connected with the spline groove, and when the door leaf (2) is unfolded, the spline sleeve (11) can be driven by the spline shaft (10) to rotate in the piston tube (4), and the spline sleeve (11) can slide upwards under the sliding fit of the limiting block and the spiral groove (16).

3. The folding vertical hinged door with self-locking function of claim 1, characterized in that: the pressure relief assembly comprises a hidden groove (7) formed in the outer wall of the door leaf (2), a ventilation pipe (6) is fixed to the inner wall of the hidden groove (7), the ventilation pipe (6) is communicated with a square pipe (24) through a communicating pipe, a piston (20) capable of sliding vertically is installed on the inner wall of the ventilation pipe (6), a vent hole (29) communicated with the outside is formed in the outer wall of the ventilation pipe (6), and the piston (20) seals the vent hole (29) in the unfolded state of the door leaf (2).

4. The folding vertical hinged door with self-locking function of claim 3, characterized in that: the inner wall of the ventilation pipe (6) is slidably provided with a cylinder (17), the cylinder (17) can rotate in the ventilation pipe (6), the cylinder (17) is rotatably connected with a piston (20), the outer wall of the cylinder (17) is provided with a limiting groove (18), the inner wall of the ventilation pipe (6) is fixed with a sliding block (19) slidably arranged in the limiting groove (18), the limiting groove (18) comprises two transverse grooves (23) and an inclined groove (22) which are communicated with each other, the inclined groove (22) is located between the two transverse grooves (23), the outer wall of the cylinder (17) far away from the piston (20) is fixed with a rotating rod (21), and one end of the rotating rod (21) penetrating out of the ventilation pipe (6) is fixed with a handle.

5. The folding vertical hinged door with self-locking function of claim 1, characterized in that: the outer wall in the middle of the door leaf (2) is provided with a mounting groove, an iron block (8) is fixed in the mounting groove, the outer wall of the door leaf (2) is adjacent to the mounting groove, a groove (9) which can be penetrated by the iron block (8) is formed in the outer wall of the door leaf (2), when the door leaf (2) is folded, the iron block (8) can be inserted into the groove (9), and the adjacent two magnetic blocks (27) in the door leaf (2) are adsorbed at two ends of the iron block (8).

6. The folding vertical hinged door with self-locking function according to any one of claims 1 to 5, characterized in that: the inner wall of the middle section of the square pipe (24) between two adjacent door leaves (2) is thickened, and the diameter of the inserted bar (28) is the same as the inner diameter of the thickened part of the square pipe (24).