Quick-opening bolt

Abstract

The invention belongs to the technical field of locks, and particularly relates to a quick-opening bolt which comprises a bolt box, a bolt frame and a bolt assembly, the bolt assembly comprises a first bolt, the two sides of the first bolt are provided with a straight face and an inclined face respectively, and when the first bolt is located in a door frame, the straight face of the first bolt abuts against the door frame, and when a door leaf is driven to be opened, the inclined face of the first bolt abuts against the door frame. At the moment, after the first spring bolt is rotated, the straight face on the first spring bolt is in an inclined state, and after the door leaf is continuously driven to be opened, the first spring bolt moves downwards along the inclined straight face and drives the spring bolt frame to move downwards at the same time, so that the first spring bolt is separated from the door frame, and a locking device is further arranged in the bolt box and comprises a locking piece and a driving block. The driving block is arranged in the bolt box in a sliding mode, the driving block is driven to move to drive the locking piece to move, at the moment, the locking piece is connected with the first spring bolt or the spring bolt frame in a clamped mode, so that rotation of the first spring bolt or downward movement of the spring bolt frame is limited, and the quick-opening bolt is simple in structure and capable of being automatically opened and closed.

Description

Technical Field

[0001] The present invention belongs to the technical field of locks, and particularly refers to a quick-opening bolt. Background Art

[0002] A bolt refers to a locking device for the secondary door on a double-leaf door. When people enter and exit normally, the secondary door is generally fixed to the door frame through upper and lower bolts. When it is necessary to carry larger objects, it is necessary to open the upper and lower bolts so that the secondary door can be opened smoothly, thus facilitating the handling of larger objects. However, the bolts currently used on the secondary door have the following problems in the use process: 1. The upper and lower bolts need to be manually opened and manually reset, and the operation is very inconvenient; 2. Since the upper and lower bolts are installed at the upper and lower ends of the secondary door, it is difficult or impossible for the elderly and children to operate due to inconvenient hands and feet, height, strength, etc. Therefore, it is necessary to provide an automatic bolt that can solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a quick-opening bolt with a simple structure that can be automatically opened and closed.

[0004] The purpose of the present invention is achieved as follows:

[0005] A quick-opening bolt includes a bolt box, a lock tongue frame slidably arranged in the bolt box, and a lock tongue assembly for locking the door leaf and the door frame together. The lock tongue assembly includes a first lock tongue rotatably arranged on the lock tongue frame. The first lock tongue protrudes outside the bolt box, and both sides of the first lock tongue have a straight surface and an inclined surface respectively. When the first lock tongue is located inside the door frame, the straight surface of the first lock tongue abuts against the door frame at this time. When driving the door leaf to open, after the first lock tongue rotates at this time, the straight surface on the first lock tongue is in an inclined state. After continuing to drive the door leaf to open, at this time, while the first lock tongue moves downward along the inclined straight surface, it drives the lock tongue frame to move downward, so that the first lock tongue disengages from outside the door frame. A locking device for restricting the downward movement of the lock tongue frame or restricting the rotation of the first lock tongue is also provided in the bolt box. The locking device includes a locking member and a driving block that can directly or indirectly drive the locking member to move. The driving block is slidably arranged in the bolt box, and the outer end of the driving block protrudes outside the bolt box. Driving the driving block to move can drive the locking member to move. At this time, the locking member is engaged with the first lock tongue or the lock tongue frame, thereby restricting the rotation of the first lock tongue or restricting the downward movement of the lock tongue frame, so that the first lock tongue cannot disengage from outside the door frame.

[0006] Furthermore, the lock tongue assembly further includes a second lock tongue. The second lock tongue is rotatably arranged on the lock tongue frame, and the second lock tongue is cross-arranged with the first lock tongue and protrudes outside the bolt box. The second lock tongue has a straight surface and an inclined surface, and the straight surfaces of the second lock tongue and the first lock tongue are respectively on the left and right sides of the lock tongue assembly.

[0007] Further, a locking plate is provided on the locking member. Locking grooves are formed at the bottoms of the first locking tongue and the second locking tongue. The locking plate is located within the locking grooves. At this time, the first locking tongue and the second locking tongue cannot rotate.

[0008] Further, mounting posts are provided on the locking plate. A first return spring is sleeved on the mounting posts. Two ends of the first return spring respectively abut against the locking plate and the inner wall of the plug box.

[0009] Further, a mounting portion is formed at the top end of the locking tongue holder. A perforation is formed at the top end of the plug box. The mounting portion passes through the perforation and exposes outside the plug box. The first locking tongue and the second locking tongue are respectively located on the left and right sides of the mounting portion. The bottom ends of the first locking tongue and the second locking tongue pass through the perforation and are located within the plug box. A mounting hole is formed in the mounting portion. Rotation holes are formed in both the first locking tongue and the second locking tongue. A rotating rod is provided on the mounting portion. The rotating rod sequentially passes through the rotation hole on the first locking tongue, the mounting hole, and the rotation hole on the second locking tongue.

[0010] Further, the locking member includes an upper locking portion and a lower locking portion that can slide relative to the upper locking portion. An upper driving plate and a lower driving plate are respectively provided on the upper locking portion and the lower locking portion. A safety spring is provided between the upper driving plate and the lower driving plate. Two ends of the safety spring respectively abut against the upper driving plate and the lower driving plate.

[0011] Further, a connecting portion is provided on the locking tongue holder. A mounting pin is mounted within the plug box. A third return spring is provided between the mounting pin and the connecting portion. Two ends of the third return spring are respectively connected to the connecting portion and the mounting pin.

[0012] Further, an eccentric block is provided between the driving block and the locking member. A mounting rod is mounted within the plug box. The eccentric block is rotatably connected to the mounting rod. Two ends of the eccentric block respectively abut against the driving block and the locking member. Driving the driving block to move can drive the eccentric block to rotate. The eccentric block can drive the locking member to move upward.

[0013] Further, a limiting groove is formed at the bottom end of the locking member. The top end of the eccentric block is located within the limiting groove. An anti-slip plate is horizontally provided within the limiting groove. The anti-slip plate abuts against the top end of the eccentric block.

[0014] Further, a guiding portion is provided on the driving block. A second return spring is sleeved on the guiding portion. Two ends of the second return spring respectively abut against the driving block and the inner wall of the plug box. Guiding arc surfaces are formed on both sides of the driving block.

[0015] The prominent and beneficial technical effects of the present invention compared with the prior art are:

[0016] The present invention belongs to the technical field of locks, and particularly refers to a quick-opening bolt, including a bolt box, a lock tongue holder slidably arranged in the bolt box, and a lock tongue assembly for locking the door leaf and the door frame together. The lock tongue assembly includes a first lock tongue rotatably arranged on the lock tongue holder, and the first lock tongue protrudes outside the bolt box. Thus, when the bolt box is installed on the secondary door, the first lock tongue will protrude from the top of the secondary door. Similar to the lock tongues on the market, the two sides of the first lock tongue respectively have a straight surface and an inclined surface. When the secondary door is closed, the inclined surface of the first lock tongue will come into contact with the edge of the door frame. As the secondary door moves, the first lock tongue will move downward along the inclined surface on the first lock tongue while driving the lock tongue holder downward, so that the first lock tongue retracts into the bolt box, enabling the secondary door to be smoothly closed. After the secondary door is closed, the lock tongue groove on the door frame corresponds to the position of the lock tongue assembly, and the first lock tongue will move upward into the lock tongue groove on the door frame. When the door leaf is closed, it is a conventional technique for the lock tongue to automatically enter the lock tongue groove on the door frame. At this time, the straight surface of the first lock tongue will abut against the inner wall of the lock tongue groove, locking the secondary door and the door frame together, making the secondary door unable to be opened without external force. However, at this time, the user only needs to apply a certain thrust to the secondary door, and the first lock tongue will rotate, making the straight surface of the first lock tongue inclined. When the user continues to drive the secondary door to open, the first lock tongue moves downward along the inclined straight surface while driving the lock tongue holder downward, causing the first lock tongue to disengage from the lock tongue groove on the door frame, and then the secondary door can be smoothly opened. When the user goes out and wants to completely close and lock the secondary door, since there is also a locking device in the bolt box for restricting the downward movement of the lock tongue holder or restricting the rotation of the first lock tongue, the locking device consists of a locking member and a driving block that can directly or indirectly drive the locking member to move. The driving block is slidably arranged in the bolt box, and the outer end of the driving block protrudes outside the bolt box. When the bolt is installed on the secondary door, the outer end of the driving block will protrude from the side of the secondary door. At this time, the user only needs to pull the main door closer to the secondary door. Then, the side surface of the driving block will come into contact with the main door. When the user continues to pull the main door, the driving block will slide into the bolt box under the extrusion force of the main door. During the sliding process of the driving block, it will directly or indirectly drive the locking member to move upward. The upward movement of the locking member will engage with the first lock tongue or the lock tongue holder. When the locking member engages with the first lock tongue, the first lock tongue cannot rotate, so that the straight surface of the first lock tongue always abuts against the door frame, making the secondary door unable to be opened. When the locking member engages with the lock tongue holder, the lock tongue holder cannot move downward, so that the first lock tongue on the lock tongue holder also cannot move downward, ultimately preventing the first lock tongue from disengaging from the lock tongue groove on the door frame and making the secondary door unable to be opened. Compared with the bolts currently used on secondary doors, which need to be manually opened and reset during use, the operation is very inconvenient. Moreover, since the upper and lower bolts are installed at the upper and lower ends of the secondary door, it is difficult or impossible for the elderly and children to operate due to inconvenient hands and feet, height, strength, etc. After the bolt of the present invention is installed at the top of the secondary door,There is no need for the user to manually open and reset the bolt, which is convenient for the user to use, and prevents the elderly and children from being unable to open or close the bolt due to reasons such as height or strength, thus affecting the normal opening or closing of the secondary door. When the main door is opened, if the user wants to open the secondary door at this time, only by applying a thrust to the secondary door, the first locking tongue will automatically disengage from the locking tongue groove on the door frame, enabling the secondary door to open normally. When the user goes out and needs to close the secondary door, after closing the main door, the main door will drive the locking member to move upward through the driving block, causing the locking member to engage with the first locking tongue or the locking tongue holder. At this time, even if an external thrust is applied to the secondary door, the first locking tongue cannot disengage from the locking tongue groove on the door frame, thus ensuring that the secondary door cannot be opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present invention.

[0018] Figure 2 is an exploded view of the present invention.

[0019] Figure 3 is an exploded view of the locking tongue holder and the locking member of the present invention.

[0020] Figure 4 is a schematic structural view of the connecting portion, the mounting pin and the third return spring of the present invention.

[0021] Figure 5 is an exploded view of the locking tongue assembly and the locking tongue holder of the present invention.

[0022] Figure 6 is an exploded view of the first locking tongue, the second locking tongue and the rotating rod of the present invention.

[0023] Figure 7 is a schematic structural view of the eccentric block and the locking member of the present invention.

[0024] Figure 8 is a schematic structural view of the driving block and the second return spring of the present invention.

[0025] Figure 9 is an exploded view of the upper locking portion and the locking portion of the present invention.

[0026] The meanings represented by the reference numerals in the drawings:

[0027] 1 - Bolt box; 2 - Locking tongue holder; 3 - Locking tongue assembly; 4 - First locking tongue; 5 - Second locking tongue;

[0028] 6 - Locking member; 7 - Driving block; 8 - Locking plate; 9 - Locking groove; 10 - Mounting post;

[0029] 11 - First return spring; 12 - Mounting portion; 13 - Perforation; 14 - Mounting hole; 15 - Rotating hole;

[0030] 16 - Rotating rod; 17 - Upper locking part; 18 - Lower locking part; 19 - Upper driving plate; 20 - Lower driving plate;

[0031] 21 - Safety spring; 22 - Connecting part; 23 - Mounting pin; 24 - Third return spring; 25 - Eccentric block;

[0032] 26 - Mounting rod; 27 - Limiting groove; 28 - Anti-slip plate; 29 - Guiding part; 30 - Second return spring;

[0033] 31 - Guiding arc surface. Detailed implementation manner

[0034] The present invention will be further described below in conjunction with specific embodiments:

[0035] The present invention belongs to the technical field of locks, and particularly refers to a quick-opening bolt, including a bolt box 1, a lock tongue holder 2 slidably arranged in the bolt box 1, and a lock tongue assembly 3 for locking the door leaf and the door frame together. The lock tongue assembly 3 includes a first lock tongue 4 rotatably arranged on the lock tongue holder 2, and the first lock tongue 4 protrudes outside the bolt box 1. Thus, when the bolt box 1 is installed on the secondary door, the first lock tongue 4 will protrude from the top of the secondary door. Similar to the lock tongues on the market, both sides of the first lock tongue 4 have a straight surface and an inclined surface respectively. When the secondary door is closed, the inclined surface of the first lock tongue 4 will come into contact with the edge of the door frame. As the secondary door moves, the first lock tongue 4 will move downward along the inclined surface on the first lock tongue 4 while driving the lock tongue holder 2 downward, so that the first lock tongue 4 retracts into the bolt box 1, enabling the secondary door to be smoothly closed. When the secondary door is closed, the lock tongue groove on the door frame corresponds to the position of the lock tongue assembly 3, and the first lock tongue 4 will move upward into the lock tongue groove on the door frame. When the door leaf is closed, it is a conventional technique for the lock tongue to automatically enter the lock tongue groove on the door frame. At this time, the straight surface of the first lock tongue 4 will abut against the inner wall of the lock tongue groove, locking the secondary door and the door frame together, making the secondary door unable to be opened without external force. However, at this time, the user only needs to apply a certain thrust to the secondary door, and the first lock tongue 4 will rotate, making the straight surface of the first lock tongue 4 inclined. At this time, when the user continues to drive the secondary door to open, the first lock tongue 4 moves downward along the inclined straight surface while driving the lock tongue holder 2 downward, so that the first lock tongue 4 disengages from the lock tongue groove on the door frame, and the secondary door can be smoothly opened. When the user goes out and wants to completely close and lock the secondary door, since there is also a locking device in the bolt box 1 for restricting the downward movement of the lock tongue holder 2 or restricting the rotation of the first lock tongue 4, the locking device consists of a locking member 6 and a driving block 7 that can directly or indirectly drive the locking member 6 to move. The driving block 7 is slidably arranged in the bolt box 1, and the outer end of the driving block 7 protrudes outside the bolt box 1. When the bolt is installed on the secondary door, the outer end of the driving block 7 will protrude from the side of the secondary door. At this time, the user only needs to pull the main door closer to the secondary door. At this time, the side surface of the driving block 7 will come into contact with the main door. When the user continues to pull the main door, the driving block 7 will slide into the bolt box 1 under the extrusion force of the main door. During the sliding process of the driving block 7, it will directly or indirectly drive the locking member 6 to move upward. When the locking member 6 moves upward, it will engage with the first lock tongue 4 or engage with the lock tongue holder 2. When the locking member 6 engages with the first lock tongue 4, the first lock tongue 4 cannot rotate, so that the straight surface of the first lock tongue 4 always abuts against the door frame, making the secondary door unable to be opened. When the locking member 6 engages with the lock tongue holder 2, the lock tongue holder 2 cannot move downward, so that the first lock tongue 4 on the lock tongue holder 2 also cannot move downward, ultimately making the first lock tongue 4 unable to disengage from the lock tongue groove on the door frame, making the secondary door unable to be opened. Compared with the bolts currently used on secondary doors, which need to be manually opened and reset during use, the operation is very inconvenient. And since the upper and lower bolts are installed at the upper and lower ends of the secondary door,It is difficult or impossible for the elderly and children to operate or open due to inconvenient hands and feet, height, strength, etc. After the bolt of the present invention is installed at the top of the secondary door, there is no need for the user to manually open and reset the bolt, which is convenient for the user to use, and prevents the elderly and children from being unable to open and close the bolt due to height, strength, etc., thus affecting the normal opening and closing of the secondary door. When the main door is opened and the user wants to open the secondary door, only by applying a thrust to the secondary door, the first locking tongue 4 will automatically disengage from the locking tongue groove on the door frame, enabling the secondary door to be opened normally. When the user goes out and needs to close the secondary door, after closing the main door, the main door will drive the locking member 6 to move upward through the driving block 7, causing the locking member 6 to engage with the first locking tongue 4 or the locking tongue holder 2. At this time, even if an external thrust is applied to the secondary door, the first locking tongue 4 cannot disengage from the locking tongue groove on the door frame, thus ensuring that the secondary door cannot be opened.

[0036] Preferably, the lock tongue assembly 3 further includes a second lock tongue 5. The second lock tongue 5 is rotatably arranged on the lock tongue frame 2, and the second lock tongue 5 is arranged crosswise with the first lock tongue 4 and exposed outside the plug box 1. The second lock tongue 5 has a straight surface and an inclined surface. The straight surfaces of the second lock tongue 5 and the first lock tongue 4 are respectively on the left and right sides of the lock tongue assembly 3. Similar to the lock tongues on the market, the two sides of the second lock tongue 5 respectively have a straight surface and an inclined surface, and the straight surfaces of the second lock tongue 5 and the first lock tongue 4 are respectively on the left and right sides of the lock tongue assembly 3. Thus, when the secondary door is closed, at this time, the straight surface of the first lock tongue 4 will contact the edge of the door frame, and the first lock tongue 4 will rotate, making the straight surface on the first lock tongue 4 in an inclined state. Thus, when the first lock tongue 4 rotates to a certain extent, at this time, the first lock tongue 4 and the second lock tongue 5 will overlap. The door frame will contact the straight surface of the first lock tongue 4 and the inclined surface of the second lock tongue 5 at the same time. As the secondary door moves, at this time, the first lock tongue 4 and the second lock tongue 5 will move downward, and while the first lock tongue 4 and the second lock tongue 5 move downward, they will drive the lock tongue frame 2 to move downward synchronously, and finally the first lock tongue 4 and the second lock tongue 5 will retract into the plug box 1, so that the secondary door can be smoothly closed. After the secondary door is closed, at this time, the lock tongue groove on the door frame corresponds to the position of the lock tongue assembly 3, and the first lock tongue 4 and the second lock tongue 5 will move upward into the lock tongue groove of the door frame. At this time, the straight surfaces of the first lock tongue 4 and the second lock tongue 5 will respectively abut against the inner walls on both sides of the lock tongue groove, so as to ensure that there is no gap between the lock tongue assembly 3 and the door frame, making the secondary door not easy to shake. And at this time, the secondary door and the door frame are in a locked state, so that the secondary door cannot be opened without external force. However, at this time, as long as the user applies a certain thrust to the secondary door, the second lock tongue 5 will rotate, and the straight surface of the second lock tongue 5 will be in an inclined state. When the second lock tongue 5 rotates to a certain extent, at this time, the second lock tongue 5 and the first lock tongue 4 will overlap, and the straight surface of the second lock tongue 5 and the inclined surface of the first lock tongue 4 will contact the door frame at the same time. After continuing to push the secondary door, the first lock tongue 4 and the second lock tongue 5 will move downward. While the first lock tongue 4 and the second lock tongue 5 move downward, they will drive the lock tongue frame 2 to move downward in the plug box 1, so that the lock tongue frame 2, the first lock tongue 4 and the second lock tongue 5 move downward synchronously, and the first lock tongue 4 and the second lock tongue 5 retract into the plug box 1, so that the secondary door can be smoothly opened. The settings of the first lock tongue 4 and the second lock tongue 5 enable the secondary door leaf to be normally closed or opened regardless of the direction.

[0037] Preferably, a locking plate 8 is provided on the locking member 6. Locking grooves 9 are respectively formed at the bottoms of the first lock tongue 4 and the second lock tongue 5. The locking plate 8 is located in the locking grooves 9. At this time, the first lock tongue 4 and the second lock tongue 5 cannot rotate. When the locking member 6 moves upward, it will drive the locking plate 8 to move upward at the same time, so that the locking plate 8 enters the locking grooves 9 of the first lock tongue 4 and the second lock tongue 5 at the same time, thus ensuring that the first lock tongue 4 and the second lock tongue 5 cannot rotate and the secondary door cannot be opened.

[0038] Preferably, the locking plate 8 is provided with a mounting post 10, and a first return spring 11 is sleeved on the mounting post 10. The two ends of the first return spring 11 are respectively abutted against the locking plate 8 and the inner wall of the plug box 1. The arrangement of the mounting post 10 on the locking plate 8 enables the first return spring 11 to be smoothly mounted on the locking plate 8 and prevents the first return spring 11 from moving randomly. When the locking member 6 moves upward, it will drive the locking plate 8 to move upward synchronously, so that the locking plate enters the locking grooves 9 at the bottoms of the first locking tongue 4 and the second locking tongue 5 at the same time and is engaged with the first locking tongue 4 and the second locking tongue 5, preventing the first locking tongue 4 and the second locking tongue 5 from rotating, ensuring that the sub-door cannot be opened. During the upward movement of the locking plate 8, the first return spring 11 will be compressed by the locking plate 8, making the first return spring 11 in a compressed state. Since when the main door is closed, the driving block 7 is located in the plug box 1 at this time, and the outer end of the driving block 7 is restricted by the side of the main door, the driving block 7 cannot move. The inability of the driving block 7 to move causes the locking member 6 and the locking plate 8 to be unable to move, keeping the first return spring 11 in a compressed state all the time. When the main door is opened, the driving block 7, the locking member 6 and the locking plate 8 are then released from the state of being unable to move, and the compressed return spring will drive the locking plate 8 and the locking member 6 to move downward, causing the locking plate 8 to disengage from the locking grooves 9 on the first locking tongue 4 and the second locking tongue 5. At this time, when the sub-door is pushed, the first locking tongue 4 and the second locking tongue 5 can rotate normally, enabling the first locking tongue 4 and the second locking tongue 5 to smoothly disengage from the locking tongue grooves on the door frame, and enabling the sub-door to be opened normally.

[0039] Preferably, the top end of the locking tongue frame 2 is formed with a mounting portion 12, a through hole 13 is opened at the top end of the plug box 1, the mounting portion 12 passes through the through hole 13 and exposes outside the plug box 1, and the first locking tongue 4 and the second locking tongue 5 are respectively located on the left and right sides of the mounting portion 12. The bottom ends of the first locking tongue 4 and the second locking tongue 5 pass through the through hole 13 and are located inside the plug box 1. A mounting hole 14 is opened on the mounting portion 12, rotation holes 15 are opened on both the first locking tongue 4 and the second locking tongue 5, and a rotating rod 16 is provided on the mounting portion 12. The rotating rod 16 sequentially passes through the rotation hole 15 on the first locking tongue 4, the mounting hole 14 and the rotation hole 15 on the second locking tongue 5. The arrangement of the through hole 13 enables the mounting portion 12 at the top end of the locking tongue frame 2 to be smoothly exposed outside the plug box 1, and the first locking tongue 4 and the second locking tongue 5 are rotatably connected to the mounting portion 12 through the rotating rod 16, and the first locking tongue 4 and the second locking tongue 5 are respectively located on the left and right sides of the mounting portion 12. Thus, when the first locking tongue 4 and the second locking tongue 5 rotate synchronously, they will not affect each other.

[0040] Preferably, the locking member 6 includes an upper locking portion 17 and a lower locking portion 18 that can slide relative to the upper locking portion 17. An upper driving plate 19 and a lower driving plate 20 are respectively provided on the upper locking portion 17 and the lower locking portion 18. A safety spring 21 is provided between the upper driving plate 19 and the lower driving plate 20, and both ends of the safety spring 21 are respectively abutted against the upper driving plate 19 and the lower driving plate 20. The arrangement of the upper driving plate 19 and the lower driving plate 20 enables the safety spring 21 to be smoothly installed between the upper locking portion 17 and the lower locking portion 18. When the secondary door and the door frame do not completely overlap, it means that the secondary door is not completely closed, and when the first locking tongue 4 and the second locking tongue 5 do not enter the locking tongue groove on the door frame, the first locking tongue 4 and the second locking tongue 5 will contact the door frame. At this time, the locking plate 8 on the upper locking portion 17 is not directly below the locking groove 9. When the user closes the main door, the lower locking portion 18 will be driven to move upward by the driving block 7. The lower locking portion 18 will first drive the upper locking portion 17 to move upward through the safety spring 21, and the upper locking portion 17 will drive the locking plate 8 to move upward. Since the locking plate 8 is not directly below the locking groove 9, after the locking plate 8 moves upward, it will contact the bottoms of the first locking tongue 4 and the second locking tongue 5. At this time, when the lower locking portion 18 continues to move upward, it can no longer drive the upper locking portion 17 to move upward through the safety spring 21. At this time, the upward thrust of the lower locking portion 18 will be applied to the safety spring 21, causing the safety spring 21 to enter a compressed state, thereby avoiding the situation where when the first locking tongue 4 and the second locking tongue 5 contact the door frame and the user closes the main door, the driving block 7 still drives the entire locking member 6 to move upward, resulting in the locking plate 8 pushing the first locking tongue 4 and the second locking tongue 5 upward and damaging the door frame.

[0041] Preferably, a connecting portion 22 is provided on the locking tongue holder 2, and a mounting pin 23 is mounted in the plug-in box 1. A third return spring 24 is provided between the mounting pin 23 and the connecting portion 22, and both ends of the third return spring 24 are respectively connected to the connecting portion 22 and the mounting pin 23. Since both ends of the third return spring 24 are respectively connected to the connecting portion 22 on the locking tongue holder 2 and the mounting pin 23 in the plug-in box 1, and the mounting pin 23 is fixed in the plug-in box 1, the locking tongue holder 2 will not slide downward without external force. When the locking tongue holder 2 moves downward, the locking tongue holder 2 will stretch the third return spring 24 through the connecting portion 22. When the secondary door is closed and the locking tongue groove on the door frame corresponds to the position of the locking tongue assembly 3, the stretched third return spring 24 will pull the locking tongue holder 2 upward, and the locking tongue holder 2 will drive the first locking tongue 4 and the second locking tongue 5 to move upward synchronously, so that the first locking tongue 4 and the second locking tongue 5 can extend out of the plug-in box 1 and enter the locking tongue groove on the door frame, locking the secondary door and the door frame in a locked state.

[0042] Preferably, an eccentric block 25 is provided between the driving block 7 and the locking member 6. An installation rod 26 is installed in the plug box 1. The eccentric block 25 is rotatably connected to the installation rod 26, and two ends of the eccentric block 25 are respectively abutted against the driving block 7 and the locking member 6. Driving the driving block 7 to move can drive the eccentric block 25 to rotate, and the eccentric block 25 can drive the locking member 6 to move upward. The installation of the installation rod 26 enables the eccentric block 25 to be rotatably installed in the plug box 1. After the driving block 7 moves into the plug box 1, the driving block 7 will drive the eccentric block 25 to rotate around the installation rod 26. Finally, the eccentric block 25 will push the locking member 6 upward, so that the locking member 6 can move upward smoothly.

[0043] Preferably, a limiting groove 27 is formed at the bottom end of the locking member 6. The top end of the eccentric block 25 is located in the limiting groove 27. An anti-slip plate 28 is horizontally arranged in the limiting groove 27. The anti-slip plate 28 is abutted against the top end of the eccentric block 25, so as to ensure that the eccentric block 25 can drive the locking member 6 to move upward after rotation. The anti-slip plate 28 can increase the overall contact area between the eccentric block 25 and the locking member 6, so that no slipping occurs between the eccentric block 25 and the locking member 6.

[0044] Preferably, a guiding portion 29 is provided on the driving block 7. A second return spring 30 is sleeved on the guiding portion 29. Two ends of the second return spring 30 are respectively abutted against the driving block 7 and the inner wall of the plug box 1. Guiding arc surfaces 31 are formed on both sides of the driving block 7. During the closing process of the main door, the side surface of the main door will contact the guiding inclined surface on one side of the driving block 7, so that the main door can more smoothly squeeze the driving block 7 into the plug box 1. Since there is a second return spring 30 on the guiding portion 29 of the driving block 7, two ends of the second return spring 30 are respectively abutted against the driving block 7 and the inner wall of the plug box 1, and the second return spring 30 will be compressed during the movement of the driving block 7. When the main door is completely closed, the outer end of the driving block 7 will be restricted by the side surface of the main door, so that the compressed second return spring 30 cannot push the driving block 7 out of the plug box 1. After the main door is opened, the compressed second return spring 30 will automatically push the driving block 7 out of the plug box 1, so that the user does not need to manually reset the driving block 7.

[0045] The above embodiments are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A quick-release bolt, comprising a bolt box (1), a lock tongue holder (2) slidably arranged in the bolt box (1), and a lock tongue assembly (3) for locking a door leaf and a door frame together, characterized in that: The bolt assembly (3) includes a first bolt (4) rotatably arranged on a bolt holder (2). The first bolt (4) protrudes outside the bolt box (1). Both sides of the first bolt (4) have a straight surface and an inclined surface respectively. When the first bolt (4) is located inside the door frame, the straight surface of the first bolt (4) abuts against the door frame at this time. When driving the door leaf to open, after the first bolt (4) rotates at this time, the straight surface on the first bolt (4) is in an inclined state. After continuously driving the door leaf to open, at this time, while the first bolt (4) moves downward along the inclined straight surface, it drives the bolt holder (2) to move downward, so that the first bolt (4) disengages from outside the door frame. A locking device for restricting the downward movement of the bolt holder (2) or restricting the rotation of the first bolt (4) is further provided in the bolt box (1). The locking device includes a locking member (6) and a driving block (7) that can directly or indirectly drive the locking member (6) to move. The driving block (7) is slidably arranged in the bolt box (1), and the outer end of the driving block (7) protrudes outside the bolt box (1). Driving the driving block (7) to move can drive the locking member (6) to move. At this time, the locking member (6) is engaged with the first bolt (4) or the bolt holder (2), so as to restrict the rotation of the first bolt (4) or restrict the downward movement of the bolt holder (2), so that the first bolt (4) cannot disengage from outside the door frame.

2. The quick-release bolt according to claim 1, characterized in that: The bolt assembly (3) further includes a second bolt (5). The second bolt (5) is rotatably arranged on the bolt holder (2), and the second bolt (5) is arranged crosswise with the first bolt (4) and protrudes outside the bolt box (1). The second bolt (5) has a straight surface and an inclined surface. The straight surfaces of the second bolt (5) and the first bolt (4) are respectively on the left and right sides of the bolt assembly (3).

3. The quick-release bolt according to claim 2, characterized in that: A locking plate (8) is provided on the locking member (6). Locking grooves (9) are formed at the bottoms of both the first bolt (4) and the second bolt (5). The locking plate (8) is located in the locking grooves (9). At this time, the first bolt (4) and the second bolt (5) cannot rotate.

4. The quick-release bolt according to claim 3, characterized in that: An installation post (10) is provided on the locking plate (8). A first return spring (11) is sleeved on the installation post (10). Both ends of the first return spring (11) abut against the locking plate (8) and the inner wall of the bolt box (1) respectively.

5. A quick-release bolt according to any one of claims 1-4, characterized in that: An installation part (12) is formed at the top end of the lock tongue frame (2). A through hole (13) is formed at the top end of the bolt box (1). The installation part (12) passes through the through hole (13) and exposes outside the bolt box (1). The first lock tongue (4) and the second lock tongue (5) are respectively located on the left and right sides of the installation part (12). The bottom ends of the first lock tongue (4) and the second lock tongue (5) pass through the through hole (13) and are located inside the bolt box (1). An installation hole (14) is formed on the installation part (12). Rotation holes (15) are formed on both the first lock tongue (4) and the second lock tongue (5). A rotating rod (16) is provided on the installation part (12). The rotating rod (16) sequentially passes through the rotation hole (15) on the first lock tongue (4), the installation hole (14), and the rotation hole (15) on the second lock tongue (5).

6. A quick-release bolt according to any one of claims 1-4, characterized in that: The locking member (6) includes an upper locking part (17) and a lower locking part (18) that can slide relative to the upper locking part (17). An upper driving plate (19) and a lower driving plate (20) are respectively provided on the upper locking part (17) and the lower locking part (18). A safety spring (21) is provided between the upper driving plate (19) and the lower driving plate (20). The two ends of the safety spring (21) are respectively abutted against the upper driving plate (19) and the lower driving plate (20).

7. A quick-release bolt according to any one of claims 1-4, characterized in that: A connecting part (22) is provided on the lock tongue frame (2). An installation pin (23) is installed in the bolt box (1). A third return spring (24) is provided between the installation pin (23) and the connecting part (22). The two ends of the third return spring (24) are respectively connected to the connecting part (22) and the installation pin (23).

8. A quick-release bolt according to any one of claims 1 to 4, characterized in that: An eccentric block (25) is provided between the driving block (7) and the locking member (6). An installation rod (26) is installed in the bolt box (1). The eccentric block (25) is rotatably connected to the installation rod (26). The two ends of the eccentric block (25) are respectively abutted against the driving block (7) and the locking member (6). Driving the driving block (7) to move can drive the eccentric block (25) to rotate, and the eccentric block (25) can drive the locking member (6) to move upward.

9. A quick-release bolt according to claim 8, characterized in that: A limiting groove (27) is formed at the bottom end of the locking member (6). The top end of the eccentric block (25) is located in the limiting groove (27). An anti-slip plate (28) is horizontally provided in the limiting groove (27). The anti-slip plate (28) is abutted against the top end of the eccentric block (25).

10. A quick-release bolt according to any one of claims 1-4, characterized in that: A guiding part (29) is provided on the driving block (7). A second return spring (30) is sleeved on the guiding part (29). The two ends of the second return spring (30) are respectively abutted against the driving block (7) and the inner wall of the bolt box (1). Guiding arc surfaces (31) are formed on both sides of the driving block (7).

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