Safety door lock capable of preventing back locking
By redesigning the lock body structure and using the sliding mechanism of the threaded sleeve and push block, the problem of automatic anti-locking of the anti-theft door lock is solved, ensuring that the key can be pulled out normally and avoid unnecessary damage.
Patent Information
- Application Number
- CN202421953226.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The problem of existing anti-theft door locks being unable to be opened after automatic locking, resulting in inconvenience to inability to enter the house.
By redesigning the lock body structure, the key is inserted into the lock cylinder and rotated to drive the threaded sleeve to move. The push block slides on the slide. When the push block moves into the valley, open the door lock. Continue to rotate the key so that the push block moves to the convex peak to remove the key, preventing automatic locking.
It prevents the door lock from being automatically locked, ensuring that the key can be pulled out smoothly, and avoids damage to the door lock caused by forgetting to take the key.
Smart Images
Figure CN223089074U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of safety door locks, in particular to a safety door lock that can prevent anti-locking. Background Technique
[0002] As the name implies, a door lock is a device used to lock a door to prevent others from opening it. There are many classifications of door locks, and the requirements for door locks vary in different occasions. Ordinary families generally use anti-theft door locks, which are highly secure and relatively inexpensive.
[0003] The current anti-theft door locks mainly consider the safety protection function in design. The existing anti-theft locks can achieve the automatic anti-locking function after closing the door lock. However, in some cases where the key is forgotten, the door lock automatically anti-locks, resulting in the inability to enter the house, which will cause some inconveniences. It is necessary to design a door lock with an anti-anti-locking function to deal with such events, avoiding our long-term door-opening habits and preventing the key from being forgotten to damage the door lock. Content of the Utility Model
[0004] The purpose of the utility model is to provide a safety door lock that can prevent anti-locking. By redesigning the internal structure of the lock body, when the key is inserted into the lock core column and rotated to perform the unlocking action, the rotating lock core column drives the threaded sleeve to move, so that the threaded sleeve drives the push block to slide on the surface of the sliding plate. When the push block moves into the concave valley, the door lock is opened. Then, continue to rotate the key to move the push block to the convex peak to pull out the key. At this time, the movable column moves out of the lock body under the support of the push block and the sliding plate, which can prevent the automatic anti-locking of the door lock, so as to solve the problems raised in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A safety door lock that can prevent anti-locking, including a lock body, a front panel cover plate, a rear panel cover plate, a front panel mounting plate and a rear panel mounting plate. The front panel mounting plate and the rear panel mounting plate are respectively located on the front and rear sides of the lock body. An activity handle is movably arranged on the front of the front panel cover plate, and a fixed handle is fixed on the back of the rear panel cover plate. A lock core column is inserted into the inner cavity of the lock body. A fixed pin is arranged on the lock body. The lock core column drives the fixed pin to telescopically move through a transmission structure. An activity column is arranged inside the lock body. One end of the activity column penetrates through the lock body and extends outward. A threaded sleeve is threadedly connected to the outside of the lock core column. A push block is arranged on one side of the threaded sleeve close to the activity column. A sliding plate is fixed at one end of the activity column close to the lock core column. The push block is slidably connected to the sliding plate. An adjusting component for limiting the activity column is arranged on the outside of the activity column.
[0006] Preferably, the adjustment assembly includes a support spring sleeved on the outside of the movable column for pushing the slide plate to move inward, one end of the support spring is fixed to the side of the slide plate away from the push block, the other end of the support spring is fixed to the inner wall of the lock body, and positioning rods are fixed on the front and back sides of the slide plate away from the push block, and a positioning tube is fixed to the inner cavity of the lock body, and the end of the positioning rod away from the slide plate passes through the inner cavity of the positioning tube.
[0007] Preferably, a limit frame is fixed on the side of the lock body inner cavity away from the movable column, a screw hole is opened on the side of the threaded sleeve away from the push block, the inner cavity of the screw hole is threadedly connected to a limit pin, and one end of the limit pin away from the threaded sleeve penetrates into the inner cavity of the limit frame and slides back and forth in the inner cavity of the limit frame.
[0008] Preferably, a slide groove is provided on the front and back sides of the inner cavity of the lock body, a slider is slidably connected to the inner cavity of the slide groove, and the opposite side of the slider passes through the slide groove and is fixedly connected to the slider.
[0009] Preferably, a lock core hole is opened on the outer sides of the front panel cover and the rear panel cover, and two ends of the lock core column pass through the lock core hole and extend outward.
[0010] Preferably, the side of the slide plate close to the push block is arranged in a concave-convex shape, the position of the slide plate close to the push block closest to and farthest from the push block are respectively a convex peak and a concave valley, and the slide plate is provided with two groups of convex peaks and a group of concave valleys between the convex peaks.
[0011] Preferably, it also includes a movable pin extending outward from the inside of the lock body, and a square shaft for controlling the movable pin is provided inside the lock body, and one end of the square shaft passes through the front panel mounting plate and docks with the movable handle.
[0012] Preferably, a slot is provided on a side of the convex peak away from the movable column, and the slot is engaged with a side of the push block facing the same.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model redesigns the structure inside the lock body. When the key is inserted into the lock cylinder and rotated to unlock the door, the rotating lock cylinder drives the threaded sleeve to move, so that the threaded sleeve drives the push block to slide on the surface of the slide. When the push block moves to the valley, the door lock is opened. Then, the key is continued to be rotated to move the push block to the peak to pull out the key. At this time, the movable column moves out of the lock body under the support of the push block and the slide, which can prevent the door lock from automatically locking.
[0015] 2. The utility model can limit the threaded sleeve by sliding the limit pin in the limit frame to prevent the threaded sleeve from rotating with the lock cylinder, and at the same time assist the threaded sleeve to translate. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0017] Figure 2 is a partial cross-sectional three-dimensional structural schematic diagram of the lock body of the present utility model;
[0018] Figure 3 is a three-dimensional structural schematic diagram of the lock core column and the sliding plate of the present utility model;
[0019] Figure 4 is a three-dimensional structural schematic diagram of the lock core column and the limit frame of the present utility model;
[0020] Figure 5 is a three-dimensional structural schematic diagram of the sliding plate of the present utility model.
[0021] Reference numerals in the figure: 1, lock body; 2, front panel cover plate; 3, rear panel cover plate; 4, front panel mounting plate; 5, rear panel mounting plate; 6, movable handle; 7, fixed handle; 8, lock core column; 9, fixed pin; 10, movable column; 11, threaded sleeve; 12, push block; 13, sliding plate; 14, adjusting assembly; 141, support spring; 142, positioning rod; 143, positioning tube; 15, limit frame; 16, screw hole; 17, limit pin; 18, chute; 19, slider; 20, lock core hole; 21, convex peak; 22, concave valley; 23, movable pin; 24, square shaft; 25, card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0023] The present utility model provides as Figures 1 to 5A safety door lock that can prevent anti - locking, including a lock body 1, a front panel cover 2, a rear panel cover 3, a front panel mounting plate 4 and a rear panel mounting plate 5. The front panel mounting plate 4 and the rear panel mounting plate 5 are respectively located on the front and rear sides of the lock body 1. An activity handle 6 is movably arranged on the front of the front panel cover 2, and a fixed handle 7 is fixed on the back of the rear panel cover 3. A lock core column 8 is inserted into the inner cavity of the lock body 1. A fixed pin 9 is arranged on the lock body 1. The lock core column 8 drives the fixed pin 9 to telescopically move through a transmission structure. An activity column 10 is arranged inside the lock body 1. One end of the activity column 10 penetrates through the lock body 1 and extends outwards. A threaded sleeve 11 is threadedly connected to the outer side of the lock core column 8. A push block 12 is arranged on the side of the threaded sleeve 11 close to the activity column 10. A sliding plate 13 is fixed at one end of the activity column 10 close to the lock core column 8. The push block 12 is slidably connected to the sliding plate 13. An adjusting component 14 for limiting the activity column 10 is arranged on the outer side of the activity column 10;
[0024] By redesigning the internal structure of the lock body 1, when the key is inserted into the lock core column 8 and rotated to perform the unlocking action, at this time, the rotating lock core column 8 drives the threaded sleeve 11 to move, so that the threaded sleeve 11 drives the push block 12 to slide on the surface of the sliding plate 13. When the push block 12 moves into the trough 22, the door lock is opened. Then, continue to rotate the key so that the push block 12 moves to the peak 21 to pull out the key. At this time, the activity column 10 moves out of the lock body 1 under the support of the push block 12 and the sliding plate 13, which can prevent the automatic anti - locking of the door lock.
[0025] The adjusting component 14 includes a support spring 141 sleeved on the outer side of the activity column 10 for pushing the sliding plate 13 to move inwards. One end of the support spring 141 is fixed on the side of the sliding plate 13 away from the push block 12, and the other end of the support spring 141 is fixed on the inner wall of the lock body 1. Positioning rods 142 are fixed on both the front and back of the side of the sliding plate 13 away from the push block 12. A positioning tube 143 is fixed in the inner cavity of the lock body 1. The end of the positioning rod 142 away from the sliding plate 13 penetrates into the inner cavity of the positioning tube 143. Through the setting of the support spring 141, the sliding plate 13 can be supported, so as to adjust the position of the activity column 10. Then, the cooperation of the positioning rod 142 and the positioning tube 143 facilitates the limitation of the sliding plate 13 and the activity column 10, ensuring the stable telescopic movement of the activity column 10.
[0026] A limiting frame 15 is fixed on the side of the inner cavity of the lock body 1 away from the activity column 10. A threaded hole 16 is opened on the side of the threaded sleeve 11 away from the push block 12. A limiting pin 17 is threadedly connected to the inner cavity of the threaded hole 16. The end of the limiting pin 17 away from the threaded sleeve 11 penetrates into the inner cavity of the limiting frame 15 and slides back and forth in the inner cavity of the limiting frame 15. By the sliding of the limiting pin 17 in the limiting frame 15, the threaded sleeve 11 can be limited to prevent the threaded sleeve 11 from rotating with the lock core column 8, and at the same time, it can assist the threaded sleeve 11 to translate.
[0027] Chutes 18 are provided on both the front and back sides of the inner cavity of the lock body 1. A slider 19 is slidably connected to the inner cavity of the chute 18. The opposite sides of the slider 19 penetrate through the chute 18 and are fixedly connected to the slide plate 13. By sliding the slider 19 in the inner cavity of the chute 18, it is convenient to limit the slide plate 13, preventing the slide plate 13 from being overly supported by the support spring 141, resulting in the movable column 10 being unable to be removed from the lock body 1. At the same time, it avoids the movable column 10 being unable to be stably arranged inside the lock body 1 after the lock core column 8 is removed.
[0028] Lock core holes 20 are provided on the outer sides of the front panel cover 2 and the rear panel cover 3. Both ends of the lock core column 8 penetrate through the lock core holes 20 and extend outward. Through the setting of the lock core holes 20, it is convenient to open and close the door lock with a key on both the front and rear sides of the door lock.
[0029] One side of the slide plate 13 close to the push block 12 is provided in a concave-convex shape. The positions of the slide plate 13 closest to and farthest from the push block 12 on the side close to the push block 12 are respectively the convex peak 21 and the concave valley 22. There are two groups of convex peaks 21 and one group of concave valleys 22 located between the convex peaks 21 on the slide plate 13. Through the setting of the shape of the slide plate 13, with different positions of the threaded sleeve 11, by using the contact between the push block 12 and the slide plate 13, different functions are realized to ensure that the door lock cannot be locked from the inside.
[0030] It also includes a movable pin 23 extending outward from the inside of the lock body 1. A square shaft 24 for controlling the movable pin 23 is arranged inside the lock body 1. One end of the square shaft 24 penetrates through the front panel mounting plate 4 and is docked with the movable handle 6. By controlling the square shaft 24 through the movable handle 6, the telescopic movement of the movable pin 23 is controlled, and only the connection between the door lock and the door frame can be controlled, and the anti-lock function cannot be realized.
[0031] A card slot 25 is provided on the side of the convex peak 21 away from the movable column 10. The side of the card slot 25 opposite to the push block 12 is clamped. Through the setting of the card slot 25, when the push block 12 contacts the slide plate 13 and the movable column 10 extends out of the lock body 1, it is convenient to use the movable column 10 to close the door lock, preventing the door lock from being pushed or pulled, resulting in the loosening of the movable column 10.
[0032] During specific use, the door lock fittings are installed on the security door. Outside the door, insert the key into the lock core column 8 and turn the key to rotate the lock core column 8. At this time, the lock core column 8 rotates within the inner cavity of the threaded sleeve 11, driving the threaded sleeve 11 to move outside the lock core column 8. At the same time, the threaded sleeve 11 drives the push block 12 to move synchronously. When the push block 12 moves from the convex peak 21 to the concave valley 22, the movable column 10 contracts into the lock body 1 under the support of the support spring 141. At the same time, the lock body 1 causes the fixed pin 9 to retract into the interior of the lock body 1 through the transmission structure. At this time, simply press the movable handle 6 to open the door lock. However, the key cannot be pulled out from the lock core column 8. It is necessary to continue rotating the lock core column 8 to make the push block 12 continue to move in cooperation with the threaded sleeve 11, so that the push block 12 contacts the next set of convex peaks 21 again, and the movable column 10 extends out of the lock body 1 before the key can be pulled out, which can prevent the traditional door lock from automatically locking.
[0033] This technical solution is an improvement on the basis of the traditional door lock structure. Some structures of this door lock are the same as those of the traditional door lock structure. For example, how the lock core column 8 moves the fixed pin 9 to expand and contract through the transmission structure belongs to the prior art and will not be described in detail in this solution.
[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A safety door lock that can prevent anti-locking, characterized in that: It includes a lock body (1), a front panel cover (2), a rear panel cover (3), a front panel mounting plate (4) and a rear panel mounting plate (5). The front panel mounting plate (4) and the rear panel mounting plate (5) are respectively located on the front and rear sides of the lock body (1). An activity handle (6) is movably arranged on the front of the front panel cover (2), a fixed handle (7) is fixed on the back of the rear panel cover (3), a lock core column (8) is inserted into the inner cavity of the lock body (1), a fixed pin (9) is arranged on the lock body (1), and the lock core column (8) drives the fixed pin (9) to telescopically move through a transmission structure. An activity column (10) is arranged inside the lock body (1), one end of the activity column (10) penetrates through the lock body (1) and extends outwards. A threaded sleeve (11) is threadedly connected to the outer side of the lock core column (8), a push block (12) is arranged on one side of the threaded sleeve (11) close to the activity column (10), a sliding plate (13) is fixed at one end of the activity column (10) close to the lock core column (8), the push block (12) is slidably connected to the sliding plate (13), and an adjusting component (14) for limiting the activity column (10) is arranged on the outer side of the activity column (10).
2. The anti-lock safety door lock according to claim 1, characterized in that: The adjusting component (14) includes a support spring (141) sleeved on the outer side of the activity column (10) for pushing the sliding plate (13) to move inwards. One end of the support spring (141) is fixed on the side of the sliding plate (13) away from the push block (12), and the other end of the support spring (141) is fixed on the inner wall of the lock body (1). Positioning rods (142) are fixed on both the front and back of the side of the sliding plate (13) away from the push block (12). A positioning tube (143) is fixed in the inner cavity of the lock body (1), and one end of the positioning rod (142) away from the sliding plate (13) penetrates into the inner cavity of the positioning tube (143).
3. The anti-lock safety door lock according to claim 1, characterized in that: A limiting frame (15) is fixed on one side of the inner cavity of the lock body (1) away from the activity column (10). A threaded hole (16) is opened on one side of the threaded sleeve (11) away from the push block (12). A limiting pin (17) is threadedly connected to the inner cavity of the threaded hole (16). One end of the limiting pin (17) away from the threaded sleeve (11) penetrates into the inner cavity of the limiting frame (15) and slides back and forth in the inner cavity of the limiting frame (15).
4. A safety door lock capable of preventing anti-lock according to claim 1, characterized in that: Chute grooves (18) are opened on both the front and back of the inner cavity of the lock body (1). Sliding blocks (19) are slidably connected to the inner cavities of the chute grooves (18). The opposite sides of the sliding blocks (19) penetrate through the chute grooves (18) and are fixed to the sliding plate (13).
5. The anti-reverse-lock safety door lock according to claim 1, characterized in that: Lock core holes (20) are opened on the outer sides of the front panel cover (2) and the rear panel cover (3). Both ends of the lock core column (8) penetrate through the lock core holes (20) and extend outwards.
6. The anti-jamming safety door lock according to claim 1, characterized in that: The side of the sliding plate (13) close to the push block (12) is arranged in a concave-convex shape. The positions of the sliding plate (13) closest to and farthest from the push block (12) on the side close to the push block (12) are a convex peak (21) and a concave valley (22) respectively. There are two groups of convex peaks (21) and one group of concave valleys (22) located between the convex peaks (21) on the sliding plate (13).
7. A safety door lock capable of preventing anti-lock, characterized in that: It further includes a movable pin (23) extending outwardly inside the lock body (1), a square shaft (24) for controlling the movable pin (23) is arranged inside the lock body (1), and one end of the square shaft (24) penetrates through the front panel mounting plate (4) and is docked with the movable handle (6).
8. The anti-reverse-locking safety door lock according to claim 6, characterized in that: A clamping groove (25) is formed on one side of the convex peak (21) away from the movable column (10), and the side of the clamping groove (25) facing the push block (12) is clamped.