A door bolt anti-shaking mechanism
By installing a limiting ring and a lock hole bushing made of soft material inside the lock hole bushing of the secret room door, the problem of the lock bolt shaking is solved, achieving higher concealment and security.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-14
AI Technical Summary
The bolts on existing secret room doors tend to loosen when reused, causing the door's location to be exposed and reducing its concealment.
The design employs a lock hole bushing and a limiting ring structure. The limiting ring on the inner wall of the lock hole bushing fits snugly against the outer wall of the bolt. Combined with the lock hole bushing and retaining ring design made of soft material, this prevents the bolt from shaking.
It effectively prevents the door bolt from shaking, improves the concealment of the sealed room door, reduces noise, and enhances security.
Smart Images
Figure CN224496124U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealed door structure technology, specifically to a door bolt anti-shaking mechanism. Background Technology
[0002] A secret room typically refers to a specially designed, concealed space within a building, primarily used for security, privacy, or emergency refuge. The door to this secret room is a functional doorway concealed within the architectural space through a special design and structure.
[0003] To ensure that the bolt can be repeatedly inserted into the locking hole when used repeatedly, existing secret room doors use a clearance fit between the bolt and the locking hole. However, this clearance fit is prone to shaking during use, which can easily expose the location of the secret room door and reduce its concealment. Utility Model Content
[0004] The purpose of this invention is to solve the technical problem that existing lock doors are prone to shaking during use, which easily exposes the location of the lock door and reduces its concealment, and to provide a door bolt anti-shaking mechanism.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A door bolt anti-shake mechanism includes a lock sleeve, a door bolt, and a lock hole bushing. The lock sleeve is used to fix it to a door frame, the door bolt is used to install it on a door leaf, and the lock hole bushing is fixed inside the lock sleeve. The lock hole bushing has an insertion hole, and a limiting ring extending towards the center of the lock hole bushing is provided on the inner wall of the lock hole bushing at the insertion hole position. When the door bolt extends, it passes through the limiting ring and is inserted into the insertion hole of the lock hole bushing, and the limiting ring is in contact with the outer wall of the door bolt.
[0007] Furthermore, the cross-section of the limiting ring near the bolt is arc-shaped.
[0008] Furthermore, the keyhole bushing is made of a soft material.
[0009] Furthermore, the insertion hole of the lock hole bushing is a vertically arranged waist-shaped hole structure, and the cross-section of the bolt is circular.
[0010] Furthermore, a retaining ring extending inward is fixedly connected to one end of the lock sleeve near the bolt. The inner diameter of the retaining ring is smaller than the outer diameter of the lock hole bushing, and the retaining ring fits against the end of the lock hole bushing near the bolt.
[0011] Furthermore, a fixing frame is fixedly connected to the lock sleeve, and an installation hole is provided on the fixing frame. The installation hole is used to insert and install the fixing component of the fixing frame. A tail sealing plate is fixedly connected to the end of the lock hole bushing away from the limiting ring. The tail sealing plate is arranged opposite to the installation hole to cover the installation hole.
[0012] The door bolt anti-shaking mechanism provided by this utility model has the following beneficial effects: by fixing a lock hole bushing inside the lock sleeve, the door bolt is inserted into the lock hole bushing, and the lock hole bushing limits the door bolt, thereby preventing the door bolt from shaking and improving the concealment effect of the sealed door. Attached Figure Description
[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings:
[0014] Figure 1 A top view cross-sectional structural diagram of a door bolt anti-shaking mechanism provided by this utility model;
[0015] Figure 2 A three-dimensional structural diagram of the lock hole bushing in a door bolt anti-shaking mechanism provided by this utility model;
[0016] Figure 3 A side view of the lock hole bushing in a door bolt anti-shaking mechanism provided by this utility model;
[0017] Figure 4 A partial front view of a door bolt anti-shaking mechanism provided by this utility model;
[0018] Figure 5 A schematic diagram of the cooperation state between the fixing frame and the fixing component in a door bolt anti-shaking mechanism provided by this utility model;
[0019] Figure 6 This is a schematic diagram of the lock hole bushing in a door bolt anti-shake mechanism according to another embodiment.
[0020] The following are the labels in the diagram: 1. Lock sleeve; 11. Retaining ring; 2. Door bolt; 3. Lock hole bushing; 31. Insertion hole; 32. Limiting ring; 33. Tail end plate; 4. Fixing frame; 41. Mounting hole; 5. Fastener. Detailed Implementation
[0021] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.
[0023] It should be noted that all directional indications (such as up-down-left-right-forward-backward...) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.
[0024] like Figures 1-5 As shown, a door bolt anti-shaking mechanism includes a lock sleeve 1, a door bolt 2, and a lock hole bushing 3. The lock sleeve 1 is used to fix it to the door frame, the door bolt 2 is used to install it on the door leaf (not shown in the figure), and the lock hole bushing 3 is fixed inside the lock sleeve 1. The lock hole bushing 3 has an insertion hole 31, and a limiting ring 32 extending towards the center of the lock hole bushing 3 is provided on the inner wall of the lock hole bushing 3 at the position of the insertion hole 31. When the door bolt 2 extends out, it passes through the limiting ring 32 and is inserted into the insertion hole 31 of the lock hole bushing 3, and the limiting ring 32 is in contact with the outer wall of the door bolt 2.
[0025] By adopting the above technical solution, a lock hole bushing 3 is fixed inside the lock sleeve 1. The bolt 2 moves telescopically under the action of the drive mechanism and is inserted into the lock hole bushing 3 when the bolt 2 extends. The lock hole bushing 3 limits the bolt 2, thereby preventing the bolt 2 from shaking and improving the concealment effect of the sealed door.
[0026] Specifically, the side of the limiting ring 32 closest to the bolt 2 has an arc-shaped cross section; thus facilitating the insertion of the bolt 2 into the lock hole bushing 3 when the bolt 2 extends.
[0027] Specifically, the lock hole bushing 3 is made of a soft material, such as rubber, plastic, or cork. By using a malleable soft material, it can abut against the bolt 2 and, through an interference fit, reduce gaps and prevent wobbling, while also preventing the bolt 2 from colliding with the lock sleeve 1 and causing noise.
[0028] Specifically, the insertion hole 31 of the lock hole bushing 3 is a vertically arranged waist-shaped hole structure, and the cross-section of the bolt 2 is circular. When the bolt 2 and the lock hole bushing 3 are engaged, they abut against each other in the horizontal direction to prevent the bolt 2 from shaking, while there is a gap in the vertical direction to facilitate compensation for the vertical installation position error of the bolt 2.
[0029] Specifically, a retaining ring 11 extending inwards is fixedly connected to one end of the lock sleeve 1 near the bolt 2. The inner diameter of the retaining ring 11 is smaller than the outer diameter of the lock hole bushing 3. The retaining ring 11 fits against the end of the lock hole bushing 3 near the bolt 2. The retaining ring 11 limits and blocks the lock hole bushing 3, thereby limiting the lock hole bushing 3 within the lock sleeve 1 and preventing the lock hole bushing 3 from falling off.
[0030] In some embodiments, such as Figure 5 As shown, a fixing frame 4 is fixedly connected to the lock sleeve 1. The fixing frame 4 has a mounting hole 41 for inserting and installing a fixing member 5. A tail sealing plate 33 is fixedly connected to the end of the lock hole bushing 3 furthest from the limiting ring 32. The tail sealing plate 33 is positioned opposite to the mounting hole 41 to cover it, thus concealing the mounting hole 41 and the fixing member 5 from external visibility. Specifically, the fixing member 5 is an expansion bolt.
[0031] In other embodiments, such as Figure 6 As shown, the end of the lock hole bushing 3 furthest from the limiting ring 32 is an open structure.
[0032] The parts not covered in this technical solution can be implemented using existing technologies.
[0033] The foregoing has shown and described the basic principles, main features, and characteristics of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model includes the appended claims and their equivalents.
Claims
1. A door bolt anti-shake mechanism, characterized in that: The device includes a lock sleeve (1), a bolt (2), and a lock hole bushing (3). The lock sleeve (1) is used to fix the device to the door frame, the bolt (2) is used to install the device on the door leaf, and the lock hole bushing (3) is fixed inside the lock sleeve (1). The lock hole bushing (3) has an insertion hole (31). A limiting ring (32) extending toward the center of the lock hole bushing (3) is provided on the inner wall of the lock hole bushing (3) at the position of the insertion hole (31). When the bolt (2) extends out, it passes through the limiting ring (32) and is inserted into the insertion hole (31) of the lock hole bushing (3), and the limiting ring (32) is in contact with the outer wall of the bolt (2).
2. The anti-shaking mechanism for a door bolt according to claim 1, characterized in that: The side of the limiting ring (32) near the bolt (2) has an arc-shaped cross section.
3. The anti-shaking mechanism for a door bolt according to claim 1, characterized in that: The keyhole bushing (3) is made of soft material.
4. The anti-shaking mechanism for a door bolt according to claim 1, characterized in that: The insertion hole (31) of the lock hole bushing (3) is a vertically arranged waist-shaped hole structure, and the cross-section of the bolt (2) is circular.
5. A door bolt anti-shaking mechanism according to claim 1, characterized in that: A retaining ring (11) extending into the inside of the lock sleeve (1) is fixedly connected to one end of the lock sleeve (1) near the bolt (2). The inner diameter of the retaining ring (11) is smaller than the outer diameter of the lock hole bushing (3). The retaining ring (11) fits against the end of the lock hole bushing (3) near the bolt (2).
6. A door bolt anti-shaking mechanism according to any one of claims 1-5, characterized in that: A fixing frame (4) is fixedly connected to the lock sleeve (1). The fixing frame (4) has an installation hole (41). The installation hole (41) is used to insert and install the fixing member (5) of the fixing frame (4). A tail sealing plate (33) is fixedly connected to the end of the lock hole bushing (3) away from the limiting ring (32). The tail sealing plate (33) is arranged opposite to the installation hole (41) to cover the installation hole (41).