Automatic locking device for window
By using a double torsion spring linkage reset mechanism and a limiting structure, the problems of inaccurate automatic reset and unstable locking of window locking devices are solved, achieving accurate return of the lock hook and stability of the locking process, thus improving the reliability and structural strength of the locking.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHAOQING HEHONG HARDWARE PRODUCTS CO LTD
- Filing Date
- 2025-06-07
- Publication Date
- 2026-05-19
AI Technical Summary
Existing window locking devices lack automatic reset function, the lock hook reset is inaccurate, posing a risk of false locking, and the lock hook movement trajectory lacks a limiting structure, resulting in unstable locking and easy jamming or loosening due to shaking or external impact.
The system employs a dual torsion spring linkage reset mechanism. The first torsion spring connects the locking hook and the rotating block to achieve elastic linkage, while the second torsion spring acts directly below the locking hook to provide directional reset elastic force. The movement trajectory of the locking hook is restricted by the circular protrusion and the slotted hole limiting structure. Combined with the closed cavity design, a stable locking unit is formed.
It significantly improves the accuracy and timeliness of automatic locking hook return, eliminates the risk of false locking, enhances the stability and anti-interference ability of the locking process, and improves the reliability and structural strength of locking.
Smart Images
Figure CN224260062U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of door and window hardware technology, specifically relating to an automatic window locking device. Background Technology
[0002] Existing window locking devices generally suffer from a lack of automatic reset function and insufficient locking stability. For example, traditional locking structures often rely on a single spring or manual operation to reset the lock hook, resulting in the lock hook not being able to quickly and accurately return to its original position after the window is closed, posing a risk of false locking. At the same time, the lock hook lacks a trajectory limiting structure during movement, making it prone to jamming or loosening due to shaking or external impact, affecting the reliability of locking.
[0003] Furthermore, although the existing technology patent uses a spring to drive the lock hook to reset, it only connects the lock hook and the window frame through a single spring, resulting in a dispersed reset force transmission path and the absence of a physical limiting structure for the lock hook's movement trajectory. Utility Model Content
[0004] The purpose of this invention is to provide an automatic window locking device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic window locking device, comprising a lock frame, a lock housing, a lock hook, a rotating block, a first torsion spring, and a second torsion spring, wherein the lock hook and the rotating block are arranged side by side in the installation space enclosed by the lock frame and the lock housing, forming a core structural unit for linkage locking;
[0006] The two ends of the first torsion spring are respectively engaged in the corresponding slots of the lock hook and the rotating block, and are fixed to the lock frame and the lock shell by the rotating shaft rivet, so as to drive the two to work together by elastic force;
[0007] The second torsion spring is located below the lock hook, with its two ends connected to the lock hook, the lock frame, and the lock housing, respectively. It is used to provide a restoring force to the lock hook in the locking direction for automatic locking.
[0008] Preferably, the locking hook and the rotating block are respectively provided with corresponding slots, and the two ends of the first torsion spring are respectively engaged in the slots of the locking hook and the rotating block, and are fixedly installed on the lock frame and the lock housing by rotating shaft rivets, so that the locking hook and the rotating block are linked and cooperated.
[0009] Preferably, the lock hook has circular protrusions on both sides, and the lock frame and lock shell have corresponding slots. The circular protrusions are inserted into the slots to limit the movement trajectory of the lock hook and keep it stable during the locking process.
[0010] Preferably, it also includes a transmission rod locking pin, which is linked to the rotating block. The transmission rod locking pin is driven by external force to rotate the rotating block, so that the locking hook can perform locking and unlocking actions.
[0011] Preferably, the lock frame and the lock housing are fixedly connected by rivets to form a closed mounting cavity. The lock hook, rotating block, first torsion spring and second torsion spring are all installed in this cavity, which enhances the structural strength and safety of the device.
[0012] Preferably, the rotating block is provided with a limiting structure that cooperates with the locking hook. When the rotating block rotates to a preset position, the limiting structure engages with the locking hook, so that the window sash is in a locked state and the locking hook is accidentally unlocked.
[0013] Preferably, the second torsion spring is a compression spring, one end of which is fixedly connected to the lock hook and the other end is fixedly connected to the lock frame or lock housing. The elastic force of the second torsion spring ensures that the lock hook always has the action of moving in the locking direction and completes the automatic reset action.
[0014] Preferably, the lock frame and lock housing are provided with mounting holes, and the device is fixedly installed on the door and window sash and door and window frame by passing rivets or screws through the mounting holes, so that the automatic window locking device can be quickly disassembled and installed.
[0015] Compared with the prior art, the technical effects and advantages of this utility model are: the window uses an automatic locking device.
[0016] 1. Double torsion spring linkage reset mechanism: The first torsion spring connects the lock hook and the rotating block to achieve elastic linkage, while the second torsion spring acts directly on the bottom of the lock hook to provide directional reset elastic force, forming a double spring system of "linkage drive and directional reset". Compared with the existing single spring reset structure, it significantly improves the accuracy and timeliness of the lock hook's automatic return and eliminates the risk of false locking.
[0017] 2. Circular protrusions and slotted hole limiting structure: The circular protrusions on both sides of the lock hook are inserted into the slotted holes of the lock frame and the lock shell, which physically limit the movement trajectory of the lock hook, solving the problem of jamming and loosening of the lock hook caused by shaking or external impact in the existing technology, and enhancing the stability and anti-interference ability of the locking process.
[0018] 3. Enclosed cavity and linkage core structure: The locking hook and the rotating block are arranged side by side in the enclosed mounting cavity formed by the lock frame and the lock shell. They are fixed and linked by the first torsion spring and the rotating shaft rivet to form a compact and stable core locking unit. Compared with the dispersed reset force transmission path of the existing technology, it effectively improves the locking reliability and structural strength. Attached Figure Description
[0019] Figure 1 This is a front view of the automatic window locking device of this utility model;
[0020] Figure 2 This is a first-person perspective view of an explosion of the automatic window locking device of this utility model;
[0021] Figure 3This is a second-view exploded view of the automatic window locking device of this utility model;
[0022] Figure 4 This is a diagram illustrating the automatic locking process of the locking pin in this utility model.
[0023] Figure 5 Two figures illustrate the automatic locking process of this utility model when the locking pin engages.
[0024] Figure 6 Three figures illustrate the automatic locking process of this utility model when the locking pin engages.
[0025] Figure 7 Four figures illustrate the automatic locking process of this utility model when the locking pin is engaged.
[0026] Figure 8 Five figures illustrate the automatic locking process of this utility model when the locking pin engages.
[0027] Figure 9 A diagram showing the unlocked and escaped state of the automatic window locking device of this utility model;
[0028] Figure 10 Two figures show the unlocked and escaped state of the automatic window locking device of this utility model;
[0029] Figure 11 Three figures showing the unlocked and escaped state of the automatic window locking device of this utility model;
[0030] Figure 12 Four diagrams showing the unlocked and escaped state of the automatic window locking device of this utility model;
[0031] Figure 13 Five figures illustrate the unlocked and escaped state of the automatic window locking device of this utility model;
[0032] Figure 14 Six figures illustrate the unlocked and escaped state of the automatic window locking device of this utility model;
[0033] Figure 15 This is a diagram of the combination of the locking hook and the rotating block of this utility model.
[0034] In the diagram: 1. Lock frame; 2. Lock hook; 3. First torsion spring; 4. Rotating block; 5. Second torsion spring; 6. Lock housing; 7. Transmission rod lock pin; 8. Rotary shaft rivet. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0036] Please see Figure 1-15 This utility model provides a technical solution: an automatic window locking device, including a lock frame 1, a lock housing 6, a lock hook 2, a rotating block 4, a first torsion spring 3, and a second torsion spring 5. The lock frame 1 and the lock housing 6 are made of aluminum alloy or stainless steel and are fixedly connected by several locking pins to form a closed installation cavity. The internal space of this cavity provides a support structure for the lock hook 2 and the rotating block 4 to be installed side by side, ensuring that their axes are parallel and their spacing is matched. The lock hook 2 and the rotating block 4 are arranged side by side in the installation space enclosed by the lock frame 1 and the lock housing 6, forming the core structural unit of the linkage locking.
[0037] The two ends of the first torsion spring 3 are respectively engaged in the corresponding slots of the lock hook 2 and the rotating block 4, and are fixed to the lock frame 1 and the lock housing 6 by the rotating shaft rivet 8, so that the two can be driven to cooperate in a linkage by elastic force.
[0038] The second torsion spring 5 is located below the lock hook 2, with its two ends connected to the lock hook 2, the lock frame 1, and the lock housing 6, respectively. It is used to provide a restoring force to the lock hook 2 in the locking direction for automatic locking.
[0039] The first torsion spring 3 is a helical compression spring. Its two ends are respectively inserted into the U-shaped slots of the lock hook 2 and the rotating block 4. The rotating shaft rivet 8 passes through the lock frame 1, lock hook 2, first torsion spring 3, rotating block 4 and lock shell 6 to form a rotatable elastic connection node. When the rotating block 4 rotates clockwise under the action of external force, the first torsion spring 3 is compressed, which drives the lock hook 2 to move to one side to unlock. After the external force is removed, the first torsion spring 3 resets and drives the lock hook 2 back to the initial position, so that automatic locking can be achieved.
[0040] The locking hook 2 and the rotating block 4 are respectively provided with corresponding slots. The two ends of the first torsion spring 3 are respectively engaged in the slots of the locking hook 2 and the rotating block 4, and are fixedly installed on the lock frame 1 and the lock housing 6 by the rotating shaft rivet 8, so that the locking hook 2 and the rotating block 4 are linked and cooperated.
[0041] The lock hook 2 has circular protrusions on both sides, and the lock frame 1 and the lock shell 6 have corresponding slots. The circular protrusions are inserted into the slots to limit the movement trajectory of the lock hook 2, so as to keep it stable during the locking process. The protrusions are precisely inserted into the slots (the width of which is adapted to the protrusions) opened in the lock frame 1 and the lock shell 6 respectively, forming a horizontal movement limit, ensuring that the lock hook 2 can only slide back and forth along the axis of the slot, avoiding shaking perpendicular to the direction of movement.
[0042] It also includes a transmission rod locking pin 7, which is linked to the rotating block 4. The transmission rod locking pin 7 is driven by external force to drive the rotating block 4 to rotate, so that the locking hook 2 can perform locking and unlocking actions.
[0043] The lock frame 1 and the lock housing 6 are fixedly connected by rivets to form a closed installation cavity. The lock hook 2, the rotating block 4, the first torsion spring 3 and the second torsion spring 5 are all installed in this cavity, which enhances the structural strength and safety of the device.
[0044] The second torsion spring 5 is a cylindrical compression spring, vertically positioned below the lock hook 2. Its lower end is fixed to a pre-set spring seat at the bottom of the lock frame 1 by welding or riveting, and its upper end engages with a spring slot on the bottom surface of the lock hook 2. When the window sash is closed, the lock hook 2 moves upward due to impact, compressing the second torsion spring 5. After the window sash is in position, the second torsion spring 5 releases its elasticity, pushing the lock hook 2 downward to achieve automatic locking. When it is necessary to open the window, the transmission rod lock pin 7 (connected to the rotating block 4 via a keyway or pin) is driven by external force, causing the rotating block 4 to rotate and the first torsion spring 3 to pull the lock hook 2, thus releasing the locked state.
[0045] The rotating block 4 is provided with a limiting structure that cooperates with the locking hook 2. When the rotating block 4 rotates to the preset position, the limiting structure engages with the locking hook 2, so that the window sash is locked and the locking hook 2 is accidentally unlocked.
[0046] The outer edge of the rotating block 4 is provided with an L-shaped limiting protrusion, which forms a matching structure with the inverted trapezoidal limiting groove on the side of the locking hook 2. When the rotating block 4 rotates to the locking position, the limiting protrusion is fully embedded in the limiting groove, forming a mechanical lock to prevent the locking hook 2 from being accidentally unlocked due to vibration or external force.
[0047] The second torsion spring 5 is a compression spring. One end of it is fixedly connected to the lock hook 2, and the other end is fixedly connected to the lock frame 1 or the lock housing 6. The elastic force of the second torsion spring 5 ensures that the lock hook 2 always moves in the locking direction and completes the automatic reset action.
[0048] The edges of the lock frame 1 and the lock housing 6 are evenly distributed with 4 to 6 mounting holes. During installation, the lock frame 1 is fixed to the door and window frame by passing countersunk rivets or M4 stainless steel screws through the mounting holes, and the lock housing 6 is fixed to the door and window frame accordingly, ensuring that the lock hook 2 is precisely aligned with the window frame lock seat.
[0049] The enclosed cavity design completely encloses the moving parts such as the first torsion spring 3 and the second torsion spring 5, preventing dust and moisture from entering and affecting the performance of the elastic elements, while also improving the overall impact resistance of the device.
[0050] The lock frame 1 and the lock housing 6 are provided with mounting holes. The device is fixedly installed on the door and window sash and frame by passing rivets or screws through the mounting holes, so that the automatic window locking device can be quickly installed and removed.
[0051] Specifically, during use, the locking pin engages during the automatic locking process: (e.g.) Figure 4-8 As shown, the locking hook 2 rotates and presses down, causing the second torsion spring 5 to twist and store force. The locking pin moves horizontally and collides with the inclined surface of the locking hook 2, pressing down on the locking hook 2 and touching the rotating block 4. The locking pin continues to move horizontally, touching the locking hook 2 and pushing up the rotating block 4. The first torsion spring 3, which is stuck between the locking hook 2 and the rotating block 4, is twisted and stores force. The locking pin moves horizontally until it disengages from the inclined surface of the locking hook 2. Then the second torsion spring 5 releases its stored force, the locking hook 2 resets, and the locking pin is locked, thus closing the window tightly.
[0052] Unlocking the escape process: such as Figure 9-14 As shown, the locking pin moves upward, disengaging from the rotating block 4. The first torsion spring 3 releases its torque, the rotating block 4 resets, and the locking pin moves downward, pressing down the rotating block 4 and the locking hook 2. At the same time, the second torsion spring 5 twists and stores force. At this time, the transmission rod locking pin 7 moves horizontally and disengages from the rotating block 4. The second torsion spring 5 releases its force, and the locking hook 2 and the rotating block 4 reset to their initial state, allowing the window to be opened (the rotation of the locking hook 2 is restricted to the lock housing and lock frame groove by a protrusion).
[0053] The above-described implementation achieves automatic locking when the window sash is closed, convenient operation when opening, and structural stability during long-term use through the coordinated design of double torsion spring elastic linkage, physical limiting structure and closed installation cavity, thus meeting the reliability and durability requirements of door and window hardware.
[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic window locking device, comprising a lock frame (1), a lock housing (6), a lock hook (2), a rotating block (4), a first torsion spring (3), and a second torsion spring (5), characterized in that: The lock hook (2) and the rotating block (4) are arranged side by side in the installation space enclosed by the lock frame (1) and the lock shell (6) to form the core structural unit of linkage locking; The two ends of the first torsion spring (3) are respectively engaged in the corresponding slots of the lock hook (2) and the rotating block (4), and are fixed to the lock frame (1) and the lock shell (6) by the rotating shaft rivet (8), so as to drive the two to work together in an elastic force; The second torsion spring (5) is located below the lock hook (2), and its two ends are connected to the lock hook (2) and the lock frame (1) and the lock shell (6) respectively. It is used to provide a reset spring force to the lock hook (2) in the direction of locking for automatic locking.
2. The automatic window locking device according to claim 1, characterized in that: The lock hook (2) and the rotating block (4) are respectively provided with corresponding slots. The two ends of the first torsion spring (3) are respectively engaged in the slots of the lock hook (2) and the rotating block (4), and are fixedly installed on the lock frame (1) and the lock shell (6) by the rotating shaft rivet (8), so that the lock hook (2) and the rotating block (4) are linked and cooperated.
3. The automatic window locking device according to claim 1, characterized in that: The lock hook (2) has circular protrusions on both sides, and the lock frame (1) and lock shell (6) have corresponding slots. The circular protrusions are inserted into the slots to restrict the movement trajectory of the lock hook (2) and keep it stable during the locking process.
4. The automatic window locking device according to claim 1, characterized in that: It also includes a transmission rod lock pin (7), which is linked to the rotating block (4). The transmission rod lock pin (7) is driven by external force to drive the rotating block (4) to rotate, so that the lock hook (2) can perform locking and unlocking actions.
5. The automatic window locking device according to claim 1, characterized in that: The lock frame (1) and the lock housing (6) are fixedly connected by rivets to form a closed installation cavity. The lock hook (2), the rotating block (4), the first torsion spring (3) and the second torsion spring (5) are all installed in this cavity, which strengthens the structural strength and safety of the device.
6. The automatic window locking device according to claim 1, characterized in that: The rotating block (4) is provided with a limiting structure that cooperates with the locking hook (2). When the rotating block (4) rotates to the preset position, the limiting structure engages with the locking hook (2), so that the window sash is locked and the locking hook (2) is accidentally unlocked.
7. The automatic window locking device according to claim 1, characterized in that: The second torsion spring (5) is a compression spring. One end of it is fixedly connected to the lock hook (2), and the other end is fixedly connected to the lock frame (1) or the lock shell (6). The elastic force of the second torsion spring (5) makes the lock hook (2) always have the action of moving in the locking direction and complete the automatic reset action.
8. The automatic window locking device according to claim 1, characterized in that: The lock frame (1) and lock housing (6) are provided with mounting holes. The device is fixedly installed on the door and window sash and door and window frame by passing rivets or screws through the mounting holes, so that the automatic window locking device can be quickly installed and removed.