Hidden door lock for fireproof door

Abstract

The utility model relates to the technical field of door locks, and discloses a hidden door lock for a fireproof door, which comprises a fireproof door plate, the outer wall of the fireproof door plate is fixedly connected with a fixed support, the inner wall of the fixed support is in sliding connection with a sliding plate, the inner wall of the fixed support is in sliding connection with a special-shaped push plate, and the special-shaped push plate is in sliding connection with the sliding plate. And one end of the special-shaped push plate is fixedly connected with a first telescopic rod, the outer wall of the first telescopic rod is sleeved with a first spring, one end of the first spring is fixedly connected to one end of the special-shaped push plate, and the other end of the first spring is fixedly connected to the inner wall of the fixed support. According to the utility model, firstly, the sliding plate is pressed to slide on the inner wall of the fixed support, so that the problems that one spring bolt cannot effectively block external force and cannot hide the door lock well are solved, and the high-strength lockset can effectively resist violent door breaking and is hidden in the door plate, so that the safety of the door lock is ensured. External force damage is prevented; and the aesthetic property is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a hidden door lock for a fireproof door. Background Art

[0002] Hidden door locks for fire doors are locks installed inside fire doors, designed to provide a high-security locking mechanism without affecting the appearance and structural strength of the door. This type of lock usually includes one or more hidden deadbolts, which automatically lock when the door is closed and automatically release when the door is opened. When the door locks open and close synchronously at the top, middle and bottom, users can open the door more easily and evacuate quickly and safely even in emergency situations such as fire.

[0003] A hidden door lock is disclosed in the publication number CN218293156U, which includes a structural body, the structural body includes an inner decorative cover assembly arranged on the inner side of the door and a lock core assembly arranged in the door cavity to realize the door locking function, the outer side of the lock core assembly is provided with a hidden outer decorative hole; the inner decorative cover assembly is composed of an inner decorative cover base fixedly connected to the door and an inner decorative cover buckled with the inner decorative cover base, the outer side of the inner decorative cover is provided with an indoor handle; the outer side of the lock core is provided with an outer decorative hidden keyhole, and the outer decorative hidden keyhole is embedded in On the outer panel of the door; a hidden external decorative hole connected to the lock core is set on the inner panel of the door to achieve the hidden function, which meets the needs of hidden door locks in some special scenarios. The appearance is simple and beautiful, and at the same time meets the key emergency door opening function, which not only protects the privacy of the user, but also takes into account emergency door opening for rescue. In this application, the lock core is only hidden through structures such as external decorative holes. This setting has only one lock tongue that cannot effectively block external forces, and at the same time fails to hide the door lock well. The fireproof door lock and fireproof door occupy a large space, are not beautiful, and are more susceptible to damage to the door lock by external forces. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a hidden door lock for fireproof doors, aiming to improve the problem that the lock tongue cannot effectively block external forces and the door lock cannot be well hidden. The fireproof door lock and the fireproof door occupy a large space, have poor aesthetics, and are more susceptible to damage to the door lock by external forces.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a hidden door lock for a fireproof door, comprising a fireproof door panel, the outer wall of the fireproof door panel is fixedly connected to a fixed support, the inner wall of the fixed support is slidably connected to a sliding plate, the inner wall of the fixed support is slidably connected to a special-shaped push plate, one end of the special-shaped push plate is fixedly connected to a telescopic rod, the outer wall of the telescopic rod is sleeved with a spring, one end of the spring is fixedly connected to one end of the special-shaped push plate, the other end of the spring is fixedly connected to the inner wall of the fixed support, the other end of the special-shaped push plate is fixedly connected to a rack, one end of the rack is fixedly connected to a middle lock tongue, the inner part of the fireproof door panel is rotatably connected to a gear, the rack is meshed with the gear, the outer wall of the gear is fixedly connected to a rotating plate, both ends of the rotating plate are rotatably connected to a connecting rod, and one end of the connecting rod is provided with a clamping assembly.

[0006] Through the above technical solution, when operating the hidden door lock of the fireproof door, first press the sliding plate, and push the special-shaped push plate through the triangular inclined block on its inner wall, so that the rack moves while the spring is stretched, and further drives the gear to rotate, so that the middle lock tongue slides in the fireproof door panel. At the same time, the rotation of the gear drives the rotating plate to rotate, and then drives the connecting rod and the rod-type lock tongue to move, so as to achieve synchronous locking and releasing at the top, middle and bottom. At the same time, the hidden door lock can protect the door lock while being more convenient and beautiful.

[0007] Furthermore, the clamping assembly includes a rod-type locking tongue, one end of which is rotatably connected to one end of the connecting rod.

[0008] Through the above technical solution, the upper and lower sides of the fireproof door panel are locked by the rod-type lock tongue in the clamping assembly.

[0009] Furthermore, a protective plate is attached to the outer wall of the fireproof door panel, and a positioning sleeve is fixedly connected to the inside of the protective plate.

[0010] Through the above technical solution, the internal door lock is protected by the protective plate.

[0011] Furthermore, the outer wall of the positioning sleeve is slidably connected to the inside of the fireproof door panel, and the inner thread of the positioning sleeve is connected with a screw.

[0012] Through the above technical solution, the meshing of the screw rod and the positioning sleeve enables the screw rod to rotate and move at the same time.

[0013] Furthermore, one end of the screw rod is fixedly connected to a handle, and the other end of the screw rod is rotatably connected to a push block.

[0014] Through the above technical solution, the driving handle can drive the push block to move through the screw rod.

[0015] Furthermore, the outer wall of the push block is slidably connected to the inner wall of the positioning sleeve, and the interior of the positioning sleeve is slidably connected to a sliding block.

[0016] Through the above technical solution, pressure is applied to the sliding block through the movement of the push block.

[0017] Furthermore, the outer wall of the sliding block is slidably connected to the inside of the fireproof door panel, and the outer wall of the sliding block is fixedly connected to a second telescopic rod.

[0018] Through the above technical solution, the protective plate can be disassembled and assembled by sliding the sliding block inside the fireproof door panel.

[0019] Furthermore, a second spring is sleeved on the outer wall of the second telescopic rod, and both ends of the second spring are fixedly connected to the outer wall of the sliding block.

[0020] Through the above technical solution, the sliding block can be pulled back into the interior of the positioning sleeve by the second rebound of the spring.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the sliding plate is first pressed to make it slide on the inner wall of the fixed support, and then the special-shaped push plate, spring 1, rack, gear, middle lock tongue, rotating plate, connecting rod and rod-type lock tongue are used to achieve high-strength locking while all of them are hidden inside the fireproof door panel, solving the problem that the lock tongue cannot effectively block external force and the door lock cannot be well hidden, achieving a high-strength lock that effectively resists violent door breaking, and hiding the lock in the door panel to prevent external force damage and improve aesthetics.

[0023] 2. In the utility model, the handle is first driven to drive the screw to rotate inside the positioning sleeve, and then the push block, the sliding block, the telescopic rod 2, and the spring 2 are cooperated to realize the disassembly and assembly of the protective plate. When the door lock fails or is damaged, the door lock protective plate can be quickly disassembled for repair or replacement, thereby reducing the closing time of the door and ensuring the door's function. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a hidden door lock for a fireproof door proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of a fixed support of a hidden door lock for a fireproof door proposed by the utility model;

[0026] Figure 3 This is a structural schematic diagram of one side of a special-shaped push plate of a hidden door lock for a fire door proposed by the utility model;

[0027] Figure 4A schematic diagram of the internal structure of a protective plate of a hidden door lock for a fireproof door proposed by the utility model;

[0028] Figure 5 The utility model is a schematic diagram of the internal structure of a positioning sleeve of a hidden door lock for a fireproof door.

[0029] Legend:

[0030] 1. Fireproof door panel; 2. Fixed support; 3. Sliding plate; 4. Special-shaped push plate; 5. Telescopic rod one; 6. Spring one; 7. Rack; 8. Gear; 9. Middle lock tongue; 10. Rotating plate; 11. Connecting rod; 12. Rod-type lock tongue; 13. Protective plate; 14. Screw; 15. Positioning sleeve; 16. Push block; 17. Sliding block; 18. Telescopic rod two; 19. Spring two; 20. Handle. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1 - Figure 3 The utility model provides an embodiment: a hidden door lock for a fireproof door, comprising a fireproof door panel 1, the outer wall of the fireproof door panel 1 is fixedly connected to a fixed support 2, the inner wall of the fixed support 2 is slidably connected to a sliding plate 3, the inner wall of the fixed support 2 is slidably connected to a special-shaped push plate 4, one end of the special-shaped push plate 4 is fixedly connected to a telescopic rod 5, the outer wall of the telescopic rod 5 is sleeved with a spring 6, one end of the spring 6 is fixedly connected to one end of the special-shaped push plate 4, and the other end of the spring 6 is fixedly connected to Connected to the inner wall of the fixed support 2, the other end of the special-shaped push plate 4 is fixedly connected to a rack 7, one end of the rack 7 is fixedly connected to a middle lock tongue 9, the inside of the fireproof door panel 1 is rotatably connected to a gear 8, the rack 7 is meshed with the gear 8, the outer wall of the gear 8 is fixedly connected to a rotating plate 10, both ends of the rotating plate 10 are rotatably connected to a connecting rod 11, one end of the connecting rod 11 is provided with a clamping assembly, the clamping assembly includes a rod-type lock tongue 12, one end of the rod-type lock tongue 12 is rotatably connected to one end of the connecting rod 11;

[0033] Specifically, first, the sliding plate 3 slides on the inner wall of the fixed support 2, and the triangular inclined block on the inner wall of the sliding plate 3 pushes the shaped push plate 4 to slide on the inner wall of the fixed support 2, and at the same time, one end of the shaped push plate 4 makes the spring 6 stretch under the guidance of the telescopic rod 5, and then the other end of the shaped push plate 4 drives the rack 7 to move. Due to the meshing between the rack 7 and the gear 8, the gear 8 rotates with the movement of the rack 7, and this rotation drives the rack 7 on the other side to move, and then drives the middle lock tongue 9 to slide inside the two fire door panels 1. During the sliding process, the rotation of the gear 8 also drives the rear rotating plate 10 to rotate, and the two ends of the rotating plate 10 drive the connecting rods 11 on both sides to move, thereby driving the rod-type lock tongue 12 to move through the other end of the connecting rod 11, realizing the effect of synchronous locking and releasing at the upper, middle and lower parts, and the hidden door lock of the fire door not only realizes efficient locking and releasing, but also improves the convenience of operation and the aesthetics of the fire door.

[0034] Reference Figure 1 , Figure 4 and Figure 5 The outer wall of the fireproof door panel 1 is fitted with a protective plate 13, and a positioning sleeve 15 is fixedly connected inside the protective plate 13, and the outer wall of the positioning sleeve 15 is slidably connected to the inside of the fireproof door panel 1, and the inner thread of the positioning sleeve 15 is connected with a screw 14, and one end of the screw 14 is fixedly connected with a handle 20, and the other end of the screw 14 is rotatably connected with a push block 16, and the outer wall of the push block 16 is slidably connected to the inner wall of the positioning sleeve 15, and the inner sliding connection of the positioning sleeve 15 is connected with a sliding block 17, and the outer wall of the sliding block 17 is slidably connected to the inside of the fireproof door panel 1, and the outer wall of the sliding block 17 is fixedly connected with a telescopic rod 18, and the outer wall sleeve of the telescopic rod 18 is provided with a spring 19, and both ends of the spring 19 are fixedly connected to the outer wall of the sliding block 17

[0035] Specifically, it is necessary to operate the driving handle 20 first, and by rotating the driving handle 20, the screw 14 starts to rotate inside the positioning sleeve 15. This action in turn drives the push block 16 to move on the inner wall of the positioning sleeve 15 and applies pressure to the sliding block 17. Under the action of pressure, the sliding block 17 moves inside the positioning sleeve 15 and the fire door panel 1, and at the same time, the spring 19 starts to stretch under the guidance of the telescopic rod 18. During the stretching process, the sliding block 17 is pushed to the inside of the fire door panel 1 to complete the installation of the protective plate 13. Once the installation is completed, the protective plate 13 can provide effective protection for the door lock. When it is necessary to remove the protective plate 13, it is only necessary to rotate the driving handle 20 in the opposite direction. At this time, the spring 19 is no longer stressed and starts to rebound. The rebounding spring 19 drives the sliding block 17 back to the inside of the positioning sleeve 15, thereby separating the protective plate 13 from the door lock, making it easy to remove and making the disassembly and assembly of the protective plate 13 simple and quick, greatly improving the maintenance efficiency, and also facilitating the inspection and maintenance of the door lock, ensuring the long-term stable operation of the door lock.

[0036] Working principle: When the hidden door lock of the fireproof door is needed, first press the sliding plate 3 to slide on the inner wall of the fixed support 2, so that the triangular inclined block on the inner wall of the sliding plate 3 pushes the special-shaped push plate 4 to slide on the inner wall of the fixed support 2, so that the spring 16 is stretched and the rack 7 is driven to move, so that the gear 8 rotates with the movement of the rack 7, thereby driving the rack 7 on the other side to move, and then driving the middle lock tongue 9 to slide inside the two fireproof door panels 1. In this process, the rotation of the gear 8 drives the rear rotating plate 10 to rotate, and then the two ends of the rotating plate 10 drive the connecting rods 11 on both sides to move, so that the other end of the connecting rod 11 drives the rod-type The lock tongue 12 moves to achieve the effect of synchronous locking and releasing at the upper, middle and lower positions, and then the handle 20 is driven to drive the screw 14 to rotate inside the positioning sleeve 15, thereby driving the push block 16 to move on the inner wall of the positioning sleeve 15, applying pressure to the sliding block 17, so that the sliding block 17 moves to the inside of the fire door panel 1 while the spring 2 19 is stretched, thereby realizing the installation of the protective plate 13. When disassembling, you only need to rotate the handle 20 in the opposite direction so that the spring 2 19 is no longer subjected to force and rebounds, thereby driving the sliding block 17 back to the inside of the positioning sleeve 15, and then the protective plate 13 can be removed, so as to facilitate the disassembly and assembly of the protective plate 13, thereby facilitating the inspection and maintenance of the door lock.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concealed door lock for a fireproof door, comprising a fireproof door panel (1), characterized in that: The outer wall of the fireproof door panel (1) is fixedly connected to a fixed support (2), the inner wall of the fixed support (2) is slidably connected to a sliding plate (3), the inner wall of the fixed support (2) is slidably connected to a special-shaped push plate (4), one end of the special-shaped push plate (4) is fixedly connected to a telescopic rod (5), the outer wall of the telescopic rod (5) is sleeved with a spring (6), one end of the spring (6) is fixedly connected to one end of the special-shaped push plate (4), and the other end of the spring (6) is fixedly connected to the outer wall of the special-shaped push plate (4). The inner wall of the fixed support (2) and the other end of the special-shaped push plate (4) are fixedly connected with a rack (7), one end of the rack (7) is fixedly connected with a middle lock tongue (9), the interior of the fireproof door panel (1) is rotatably connected with a gear (8), the rack (7) meshes with the gear (8), the outer wall of the gear (8) is fixedly connected with a rotating plate (10), both ends of the rotating plate (10) are rotatably connected with connecting rods (11), and one end of the connecting rod (11) is provided with a clamping assembly.

2. A hidden door lock for a fireproof door according to claim 1, characterized in that: The clamping assembly comprises a rod-type locking tongue (12), one end of the rod-type locking tongue (12) being rotatably connected to one end of the connecting rod (11).

3. A hidden door lock for a fire door according to claim 1, characterized in that: The outer wall of the fireproof door panel (1) is fitted with a protective plate (13), and the interior of the protective plate (13) is fixedly connected with a positioning sleeve (15).

4. A hidden door lock for a fire door according to claim 3, characterized in that: The outer wall of the positioning sleeve (15) is slidably connected to the interior of the fireproof door panel (1), and the interior of the positioning sleeve (15) is threadedly connected to a screw rod (14).

5. A hidden door lock for a fireproof door according to claim 4, characterized in that: One end of the screw rod (14) is fixedly connected to a handle (20), and the other end of the screw rod (14) is rotatably connected to a push block (16).

6. A hidden door lock for a fire door according to claim 5, characterized in that: The outer wall of the push block (16) is slidably connected to the inner wall of the positioning sleeve (15), and the interior of the positioning sleeve (15) is slidably connected to a sliding block (17).

7. A hidden door lock for a fireproof door according to claim 6, characterized in that: The outer wall of the sliding block (17) is slidably connected to the interior of the fireproof door panel (1), and the outer wall of the sliding block (17) is fixedly connected to a second telescopic rod (18).

8. A hidden door lock for a fireproof door according to claim 7, characterized in that: The outer wall of the second telescopic rod (18) is sleeved with a second spring (19), and both ends of the second spring (19) are fixedly connected to the outer wall of the sliding block (17).

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