A door locking device

Abstract

The utility model relates to door stop mechanism technical field, concretely relates to a house door locking device, including installation cylinder, movable seat and take brake trundle, the installation cylinder is used for installing on the lower part of house door movable side, one end of installation cylinder is closed, one end movable insertion in movable seat in installation cylinder and can only slide along the axial direction of installation cylinder, take brake trundle can rotatably install on the other end of movable seat, reset spring is arranged in the installation cylinder, one end of reset spring and the one end of movable seat butt joint, the other end and the one end of installation cylinder butt joint, the installation cylinder is provided with the limiting mechanism for limiting movable seat sliding position, and the house door locking device is simple structure, convenient operation, and the house door locking device that adaptability is strong can realize the stable parking of door body at any position, and can adapt to different ground conditions.

Description

Technical Field

[0001] This utility model relates to the field of door stop mechanism technology, specifically to a door locking device. Background Technology

[0002] Hinged doors are a common type of door in homes, hotels, factories, and other similar settings. However, they often present the problem of being difficult to stop securely. To maintain airflow and ventilation, traditional methods involve using stools, doorstops, or other obstacles to hold the door in place. While these methods restrict the door's position, they are inconvenient, requiring the doorstop to be removed before the door can move, making them relatively cumbersome. Door catches, such as stainless steel or silicone suction cups, only provide two fixed positions: fully open or fully closed, failing to meet the need for stopping at any angle. For example, patent CN202020856453.5 – a magnetic door stop device – only allows for positioning when the door is fully open, not for stopping securely when the door is slightly ajar. Furthermore, door catches are prone to failure due to wall wear and reduced suction power over time.

[0003] In addition, existing door stabilization devices generally suffer from poor adaptability: different weights of doors, such as wooden doors for homes and iron doors for factories, require different specifications of products, resulting in insufficient versatility; some devices are prone to generating noise or scratching the ground when the door moves due to friction with the ground.

[0004] Therefore, a door locking device with a simple structure, convenient operation, and strong adaptability is needed, which can not only make the door stop stably in any position, but also adapt to different ground conditions. Utility Model Content

[0005] In order to overcome one of the shortcomings of the existing technology, the purpose of this utility model is to provide a door locking device. This door locking device has a simple structure, is easy to operate, and has strong adaptability. It can not only make the door stop stably in any position, but also adapt to different ground conditions.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] A door locking device includes a mounting cylinder, a movable seat, and a caster with a brake. The mounting cylinder is installed on the lower part of the movable side of the door, and one end of the mounting cylinder is closed. One end of the movable seat is movably inserted into the mounting cylinder and can only slide along the axis of the mounting cylinder. The caster with a brake is rotatably mounted on the other end of the movable seat. A return spring is provided inside the mounting cylinder, one end of which abuts against the corresponding end of the movable seat, and the other end abuts against the closed end of the mounting cylinder. A limiting mechanism is provided on the mounting cylinder to limit the sliding position of the movable seat.

[0008] In some possible implementations, the limiting mechanism includes a limiting member mounted on the mounting cylinder, and a limiting groove that mates with the limiting member is provided on the outer wall of the movable seat.

[0009] In some possible implementations, the limiting mechanism includes a locking bolt and a locking nut. Through holes are provided on any two opposite sides of the mounting cylinder. Sliding slots are provided on any two opposite sides of the movable seat. The sliding slots and through holes are adapted to each other. The locking bolt passes through the sliding slot and both ends movably protrude from the through holes on the mounting cylinder. The locking nut is screwed onto the end of the locking bolt that does not have a nut.

[0010] In some possible implementations, the locking bolt has a pin hole at the end without a nut, and a pin is inserted into the pin hole.

[0011] In some possible implementations, the movable seat includes an insertion part and a mounting part, the insertion part being movably inserted into a mounting cylinder, and the caster with brake being rotatably mounted on the mounting part.

[0012] In some possible implementations, the mounting part is provided with a mounting position, and the mounting end with the brake caster is mounted on the mounting position by screws.

[0013] In some possible implementations, the outer periphery of the mounting cylinder is provided with a plurality of mounting lugs, each mounting lug having a mounting hole, and the mounting lugs are mounted to the lower part of the movable side of the door by screws passing through the mounting holes.

[0014] In some possible implementations, the outer diameter of the return spring is adapted to the inner cylinder of the mounting cylinder.

[0015] Compared to existing technologies, the advantages of this invention are as follows: The door locking device of this invention achieves elastic lifting and lowering of the caster with brake through a combination structure of a mounting cylinder, a movable seat, and a return spring. When the door moves to an uneven surface, the return spring pushes the movable seat to keep the caster in contact with the ground, preventing jamming. The friction between the braked caster and the ground allows the door to stop at any position without the need for external obstacles. The limiting mechanism further restricts the sliding stroke of the movable seat, preventing it from detaching from the mounting cylinder. Furthermore, the braking function of the braked caster can lock the wheels in strong winds and other scenarios, enhancing stable stopping. The overall structure is highly adaptable and can be installed on various types of swing doors, such as residential wooden doors and factory iron doors. It moves quietly and smoothly without scratching the ground.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of another embodiment of the present invention.

[0021] Explanation of icon numbers:

[0022] Mounting cylinder 10, perforation 11, mounting lug 12;

[0023] Movable seat 20, limiting groove 21, sliding hole 22, insertion part 23, mounting part 24, mounting position 25;

[0024] 30 casters with brakes, 31 brake buttons;

[0025] Return spring 40;

[0026] Limiting mechanism 50, limiting component 51, locking bolt 52, locking nut 53, pin hole 54. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] Reference Figures 1 to 4The door locking device shown includes a mounting cylinder 10, a movable seat 20, a caster with brake 30, a return spring 40, and a limiting mechanism 50. The mounting cylinder 10 is installed on the lower part of the movable side of the door, with one end closed to form a receiving space. One end of the movable seat 20 is inserted into the mounting cylinder 10 and slides only along the axis of the mounting cylinder 10. The caster with brake 30 is rotatably installed on the other end of the movable seat 20 and contacts the ground. The return spring 40 is located inside the mounting cylinder 10, with its two ends abutting against the movable seat 20 and the closed end of the mounting cylinder 10, respectively. The limiting mechanism 50 is installed on the mounting cylinder 10 to limit the sliding position of the movable seat 20.

[0029] Specifically, the axis of the mounting cylinder 10 is perpendicular to the ground, ensuring that the movable seat 20 rises and falls vertically, and the braked caster 30 remains in contact with the ground. When the door moves to a raised area, the braked caster 30 is compressed, causing the movable seat 20 to compress the return spring 40, allowing it to smoothly pass over the raised area. When moving to a recessed area, the return spring 40 extends, pushing the movable seat 20 downwards, and the braked caster 30 rolls downwards to fit the recessed bottom, preventing it from being suspended in mid-air. The braked function of the braked caster 30 can lock the wheel, making it suitable for strong winds or long-term stable stopping scenarios. The return spring 40 is a cylindrical helical spring, and its outer diameter matches the inner cylinder of the mounting cylinder 10, ensuring that the spring does not wobble within the mounting cylinder 10. The spring force is selected according to the weight of the door, and anti-rust grease can be applied to both ends of the spring to extend its service life in humid environments.

[0030] This device uses elastically lifting casters 30 with brakes to achieve stable stopping of the door at any position, adapting to different ground conditions and door types. Operation requires no manual assistance, thus solving the shortcomings of traditional stable stopping devices.

[0031] See Figure 2 and Figure 4 In one embodiment of this application, the movable seat 20 includes an insertion part 23 and a mounting part 24. The insertion part 23 is a square rod whose shape is adapted to the inner hole of the mounting cylinder 10, ensuring that it slides only along the axis of the mounting cylinder 10. The mounting part 24 is a rectangular metal block integrally formed with the insertion part 23, and has a mounting position 25 at the bottom. The mounting position 25 can be a conventional boss structure with screw holes. The mounting bracket or mounting end of the caster with brake 30 can be fixed to the mounting position 25 with screws. This detachable structure facilitates the individual replacement of the caster after wear, without disassembling the entire device, thus reducing maintenance costs.

[0032] In the above embodiment, the width of the mounting portion 24 is greater than the cross-sectional width of the mounting cylinder 10, which prevents the movable seat 20 from completely sliding into the mounting cylinder 10, while providing a sufficient mounting base for the caster with brake 30. For casters with brake 30 of different sizes, the screw hole position of the mounting position 25 can be adjusted to achieve a convenient installation.

[0033] See Figure 1and Figure 2 To facilitate installation and fixation, several mounting lugs 12 are welded to the outer periphery of the mounting cylinder 10, each lug 12 having a mounting hole. The mounting lugs 12 are located on the left and right sides, and top and bottom sides of the mounting cylinder 10. During installation, screws are passed through the mounting holes to fix the mounting cylinder 10 to the lower part of the movable side of the door, approximately 5-10 cm above the bottom of the door. For wooden doors, guide holes can be pre-drilled to prevent cracking; for metal doors, nuts can be welded on or self-tapping screws can be used directly, adapting to different door materials. The number of mounting lugs 12 can be adjusted according to the weight of the door—2-3 lugs for household wooden doors, and 4-5 lugs for factory iron doors, enhancing stability.

[0034] See Figure 4 In this application, the core function of the limiting mechanism 50 is to limit the sliding stroke of the movable seat 20 and prevent it from disengaging from the mounting cylinder 10. Therefore, in one embodiment of this application, a limiting member 51 is installed inside the open end of the mounting cylinder 10. The limiting member 51 can be an elastic copper sheet or a screw. A limiting groove 21 is provided on the outer wall of the insertion part 23 of the movable seat 20. The end of the limiting member 51 is inserted into the limiting groove 21, thereby limiting the movement and simultaneously adapting to the relative movement of the mounting cylinder 10 and the movable seat 20. When the movable seat 20 slides, the limiting member 51 moves along the limiting groove 21 and stops when it contacts both ends of the limiting groove 21. The structure requires no bolts, is easy to install, and is suitable for confined spaces. Furthermore, the elastic contact reduces sliding noise.

[0035] See Figure 4 In another embodiment of this application, the mounting cylinder 10 has through holes 11 on opposite sides, and the insert portion 23 of the movable seat 20 has a sliding groove hole 22. The locking bolt 52 passes through the through hole 11 and the sliding groove hole 22, and the non-nut end of the locking bolt 52 is fixed with a locking nut 53. When the movable seat 20 rises and falls, the sliding groove hole 22 slides along the locking bolt 52. When both ends of the sliding groove hole 22 contact the locking bolt 52, the sliding stops, preventing the spring from being over-compressed or stretched. To prevent the locking nut 53 from loosening, the nutless end of the locking bolt 52 has a pin hole 54. A metal pin is inserted to restrict the rotation of the locking nut 53 or to prevent the locking nut 53 from falling off, which is suitable for doors that are frequently opened and closed.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A door locking device, characterized in that, The device includes a mounting cylinder, a movable seat, and a caster with a brake. The mounting cylinder is used to install on the lower part of the movable side of a door, and one end of the mounting cylinder is closed. One end of the movable seat is movably inserted into the mounting cylinder and can only slide along the axis of the mounting cylinder. The caster with a brake is rotatably mounted on the other end of the movable seat. A return spring is provided inside the mounting cylinder, one end of which abuts against the corresponding end of the movable seat, and the other end abuts against the closed end of the mounting cylinder. A limiting mechanism is provided on the mounting cylinder to limit the sliding position of the movable seat.

2. The door locking device according to claim 1, characterized in that: The limiting mechanism includes a limiting member installed on the mounting cylinder, and a limiting groove that cooperates with the limiting member is provided on the outer wall of the movable seat.

3. A door locking device according to claim 1, characterized in that: The limiting mechanism includes a locking bolt and a locking nut. Through holes are provided on any two opposite sides of the mounting cylinder. Sliding grooves are provided on any two opposite sides of the movable seat. The sliding grooves and through holes are adapted to each other. The locking bolt passes through the sliding groove and both ends of the bolt movably protrude from the through holes on the mounting cylinder. The locking nut is screwed onto the end of the locking bolt that does not have a nut.

4. A door locking device according to claim 3, characterized in that: The locking bolt has a pin hole at the end without a nut, and a pin is inserted into the pin hole.

5. A door locking device according to claim 1, characterized in that: The movable seat includes an insertion part and an installation part. The insertion part is movably inserted into the installation cylinder, and the caster with brake is rotatably mounted on the installation part.

6. A door locking device according to claim 5, characterized in that: The mounting part is provided with a mounting position, and the mounting end with brake caster is mounted on the mounting position by screws.

7. A door locking device according to any one of claims 1-6, characterized in that: The mounting cylinder has several mounting lugs on its outer periphery, and each mounting lug has a mounting hole. The mounting lugs are installed on the lower part of the movable side of the door by screws passing through the mounting holes.

8. A door locking device according to any one of claims 1-6, characterized in that: The outer diameter of the reset spring is adapted to the inner cylinder of the mounting cylinder.

Images