Electrically operated security door lock

Abstract

The utility model relates to an electric anti -theft door lock, including the casing, be equipped with the latch bolt subassembly, square tongue subassembly, drive assembly, handle shaft and the dial piece subassembly in the casing, the dial piece subassembly cover is equipped in handle shaft, including with first dial piece of latch bolt subassembly connection, with second dial piece of drive assembly connection and with third dial piece of square tongue subassembly connection, first dial piece is configured as with handle shaft synchronous rotation, to drive latch bolt subassembly and project or retract the casing, second dial piece and third dial piece are configured as can rotate independently relative to handle shaft, drive assembly through second dial piece drive third dial piece rotation, and then drive square tongue subassembly projects or retracts the casing, the utility model can simplify internal transmission structure, realize the latch bolt and square tongue motion decoupling, and the overall reliability is high, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of locks, and more specifically, to an electric anti-theft door lock. Background Technology

[0002] In the field of security door locks, the integration of electric control and mechanical structure has become the mainstream trend, aiming to achieve higher security and convenience. Traditional electric security door locks typically have independent latches and deadbolts. The latch is directly controlled by the handle to open and close the door, while the deadbolt is driven by a motor or controlled by a key to lock. However, in existing technologies, the transmission mechanisms of the latch and deadbolt are often interconnected or scattered, requiring multiple paddles with different axes to drive the latch and deadbolt separately. This results in a complex internal lock body structure, an increased number of parts, and greater assembly difficulty. Utility Model Content

[0003] The purpose of this utility model is to provide an electric anti-theft door lock that simplifies the internal transmission structure, decouples the movement of the oblique tongue and the square tongue, and has high overall reliability and low cost.

[0004] An electric security door lock includes a housing, within which are disposed a latch assembly, a square latch assembly, a drive assembly, a handle shaft, and a paddle assembly; The paddle assembly is sleeved on the handle shaft and includes a first paddle connected to the oblique tongue assembly, a second paddle connected to the drive assembly, and a third paddle connected to the square tongue assembly; The first paddle is configured to rotate synchronously with the handle shaft to drive the tongue assembly to extend or retract into the housing; the second and third paddles are configured to rotate independently relative to the handle shaft, and the drive assembly drives the third paddle to rotate via the second paddle, thereby driving the tongue assembly to extend or retract into the housing.

[0005] In the above technical solution, by coaxially mounting the three levers controlling the latch and the square bolt on the handle shaft, the internal structure and layout of the lock body are simplified, resulting in a compact overall structure and a reduced number of parts. Specifically, the first lever is fixedly connected to the handle shaft, enabling direct manual drive of the latch, while the second and third levers can rotate independently relative to the handle shaft and are linked by the drive assembly. This mechanically decouples the movements of the latch and the square bolt, ensuring that when the handle operates alone, it only controls the latch without affecting the square bolt. This effectively avoids accidental movement and wear of the square bolt mechanism, improving operational reliability and extending the service life of components.

[0006] Furthermore, the outer peripheral surface of the handle shaft is provided with multiple protrusions, and the inner peripheral surface of the first paddle is provided with multiple grooves. The protrusions are embedded into the corresponding grooves so that the first paddle rotates synchronously with the handle shaft.

[0007] In the above technical solution, the embedded engagement between the outer circumferential protrusion of the handle shaft and the inner circumferential groove of the first lever allows the rotational movement of the handle shaft to directly drive the first lever, ensuring the immediacy and accuracy of the latch's response to the handle's action. The structure of the protrusion and groove engagement is simple to process and easy to assemble, enhancing the durability and reliability of the transmission mechanism.

[0008] Furthermore, the plurality of protrusions are arranged at equal angles with respect to the center of the handle shaft.

[0009] In the above technical solution, multiple protrusions are arranged at equal angles around the central axis of the handle shaft, so that the handle shaft is subjected to uniform force in the circumferential direction, avoiding wear and jamming caused by eccentric force, and ensuring smooth rotation of the handle.

[0010] Furthermore, the oblique tongue assembly includes an oblique tongue, a connecting rod, a return spring, and a baffle. The oblique tongue and the baffle are respectively disposed at both ends of the connecting rod, and the return spring is sleeved on the connecting rod. The first paddle drives the oblique tongue to extend and retract through the baffle.

[0011] In the above technical solution, the first paddle pushes the baffle to drive the tongue assembly, which is direct and efficient. The elastic restoring force of the return spring ensures that the tongue can remain extended after the loss of external force, so that it can automatically pop out after the door is opened or closed. The overall structure is simple and the operation is reliable.

[0012] Furthermore, the second paddle has a first tooth and a first actuating part on its outer periphery, the first tooth being connected to the drive assembly, and the third paddle has a paddle block on its outer periphery, the paddle block extending between the first tooth and the first actuating part.

[0013] In the above technical solution, a first tooth and a first actuating part are integrated on the second paddle, and a paddle block extending between the two is provided on the third paddle. When the drive assembly drives the second paddle to rotate forward or backward via the first tooth, the first actuating part and the side of the first tooth can push the paddle block from the forward and reverse directions respectively, thereby transmitting power to the third paddle and driving the latch to move. When manually operated, such as using a key to drive the third paddle to rotate, the space between the first tooth and the first actuating part allows the paddle block to rotate freely, effectively avoiding interference between different power sources and avoiding mechanical obstruction of manual operation.

[0014] Furthermore, the square latch assembly includes a square latch, a fourth lever, and a lock cylinder. The lock cylinder is connected to the third lever via the fourth lever. The fourth lever is connected to the square latch and can rotate to extend or retract the square latch.

[0015] In the above technical solution, the transmission connection between the lock cylinder, the fourth lever and the third lever allows the user to turn the lock cylinder with the key, or to control the extension and retraction of the latch by rotating the fourth lever through the electric control of the drive component, thus realizing the structural integration of two operation methods: mechanical key and electric control.

[0016] Furthermore, the square tongue is provided with a track groove, the fourth lever is provided with a lever arm, and the lever arm is provided with a column extending into the track groove.

[0017] In the above technical solution, a track groove is provided on the square tongue, and a column embedded in the track groove is provided on the actuating arm of the fourth paddle, so that the rotational motion of the fourth paddle is converted into the linear extension and retraction motion of the square tongue by the sliding of the column in the track groove.

[0018] Furthermore, the outer periphery of the lock cylinder is provided with a second tooth, and the outer periphery of the fourth lever is provided with a third tooth, the third tooth engaging with the second tooth.

[0019] In the above technical solution, stable transmission from the lock cylinder to the fourth shifter can be achieved by the meshing of the second tooth on the outer periphery of the lock cylinder and the third tooth on the outer periphery of the fourth shifter.

[0020] Furthermore, the second paddle has a fourth tooth on its outer periphery, and the fourth paddle has a fifth tooth on its outer periphery, the fifth tooth engaging with the fourth tooth.

[0021] In the above technical solution, by setting a fourth tooth on the third paddle and engaging it with a fifth tooth on the fourth paddle, the drive component can drive the square tongue to extend and retract through the third paddle.

[0022] Furthermore, a torsion spring is provided between the third and fourth paddles.

[0023] In the above technical solution, a torsion spring is set between the third and fourth paddles. The preload of the torsion spring provides a continuous torque for these two key transmission components, which can reduce the force required for the extension and retraction of the tongue, reduce the load on the drive components, and optimize the feel of manual operation.

[0024] Compared with existing technologies, the beneficial effects of this utility model are as follows: by coaxially mounting the three paddles controlling the latch and the square latch on the handle shaft, the internal structure and layout of the lock body are simplified, resulting in a compact overall structure and a reduced number of parts. Specifically, the first paddle, fixedly connected to the handle shaft, enables direct manual drive of the latch, while the second and third paddles can rotate independently relative to the handle shaft and are linked by the drive assembly. This mechanically decouples the movements of the latch and the square latch, allowing the handle to control only the latch without affecting the square latch when operating alone. This effectively avoids accidental movement and wear of the square latch mechanism, improving operational reliability and extending the service life of components. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an electric anti-theft door lock according to an embodiment of the present utility model.

[0026] Figure 2 This is a schematic diagram of the handle shaft and paddle assembly according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the oblique tongue assembly according to an embodiment of the present utility model.

[0028] Figure 4 This is a schematic diagram of the structure of the square tongue component according to an embodiment of the present utility model.

[0029] Explanation of icon numbers: 1. Housing, 11. Torsion spring, 2. Slanted tongue assembly, 21. Slanted tongue, 22. Connecting rod, 23. Return spring, 24. Baffle, 3. Square tongue assembly, 31. Square tongue, 311. Track groove, 32. Fourth paddle, 321. Paddle arm, 322. Column, 323. Third tooth, 324. Fifth tooth, 33. Lock cylinder, 33. Second tooth, 331. Drive assembly, 4. Handle shaft, 5. Protrusion, 51. Paddle assembly, 6. First paddle, 61. Groove, 611. Second paddle, 62. First tooth, 621. First actuating part, 622. Third paddle, 63. Paddle block, 631. Fourth tooth, 632. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] Please refer to Figures 1 to 4In a preferred embodiment, the electric anti-theft door lock of this utility model mainly includes a housing 1. The housing 1 contains a latch assembly 2, a square latch assembly 3, a drive assembly 4, a handle shaft 5, and a paddle assembly 6. The paddle assembly 6 is sleeved on the handle shaft 5 and includes a first paddle 61 connected to the latch assembly 2, a second paddle 62 connected to the drive assembly 4, and a third paddle 63 connected to the square latch assembly 3. The first paddle 61 is configured to rotate synchronously with the handle shaft 5 to drive the latch assembly 2 to extend or retract from the housing 1. The second paddle 62 and the third paddle 63 are configured to rotate independently relative to the handle shaft 5. The drive assembly 4 drives the third paddle 63 to rotate via the second paddle 62, thereby driving the square latch assembly 3 to extend or retract from the housing 1.

[0033] For example, the handle shaft 5 is rotatably disposed within the housing 1, and a square hole (not shown) is provided in the middle of the handle shaft 5 for connecting a handle. The latch assembly 2 and the square latch assembly 3 are respectively disposed on both radially sides of the handle shaft 5, and a first paddle 61, a second paddle 62, and a third paddle 63 are all sleeved on the handle shaft 5. In this embodiment, there are two second paddles 62; by simultaneously driving the latch assembly 2 with both second paddles 62, the stability of the latch assembly 2's movement can be improved. The drive assembly 4 can be a conventional drive device for electric locks in the art, such as a drive module consisting of a motor and a gear set.

[0034] By coaxially mounting the three levers controlling the latch bolt 21 and the square bolt 31 onto the handle shaft 5, the internal structure and layout of the lock body are simplified, resulting in a compact overall structure and a reduced number of parts. The first lever 61, fixedly connected to the handle shaft 5, enables direct manual drive of the latch bolt 21. The second and third levers 63 can rotate independently relative to the handle shaft 5 and are linked by the drive assembly 4. This mechanically decouples the movements of the latch bolt 21 and the square bolt 31, ensuring that when the handle operates alone, it only controls the latch bolt 21 without affecting the square bolt 31. This effectively prevents malfunctions and wear of the square bolt 31 mechanism, improving operational reliability and extending the service life of components.

[0035] Please refer to Figure 1 and Figure 2 The outer circumferential surface of the handle shaft 5 is provided with multiple protrusions 51, and the inner circumferential surface of the first paddle 61 is provided with multiple grooves 611. The protrusions 51 are embedded into the corresponding grooves 611 so that the first paddle 61 rotates synchronously with the handle shaft 5. Through the embedded cooperation between the outer circumferential protrusions 51 of the handle shaft 5 and the inner circumferential grooves 611 of the first paddle 61, the rotational movement of the handle shaft 5 can directly drive the first paddle 61, ensuring the immediacy and accuracy of the response of the latch 21 to the handle action. The structure of the protrusions 51 and grooves 611 is simple to process and easy to assemble, enhancing the durability and reliability of the transmission mechanism.

[0036] In this embodiment, multiple protrusions 51 are arranged at equal angles around the center of the handle shaft 5. Taking four protrusions 51 as an example, the four protrusions 51 are distributed at equal angles on the outer periphery of the handle shaft 5, and the angle between the line connecting the center of any two adjacent protrusions 51 and the center of the handle shaft 5 is 90°. The first lever 61 is correspondingly provided with four grooves 611, each groove 611 being embedded in one protrusion 51. By arranging multiple protrusions 51 at equal angles around the central axis of the handle shaft 5, the handle shaft 5 is subjected to uniform force in the circumferential direction, avoiding wear and jamming caused by eccentric force, and ensuring smooth rotation of the handle.

[0037] Please refer to Figure 3 The latch assembly 2 includes a latch 21, a connecting rod 22, a return spring 23, and a baffle 24. The latch 21 and the baffle 24 are respectively located at both ends of the connecting rod 22. The return spring 23 is sleeved on the connecting rod 22. The first paddle 61 drives the latch 21 to extend and retract through the baffle 24. The first paddle 61 drives the latch assembly 2 by pushing the baffle 24, resulting in direct and efficient transmission. The elastic restoring force of the return spring 23 ensures that the latch 21 can remain extended after the loss of external force, achieving automatic ejection after the door is opened or closed. The overall structure is simple and the operation is reliable.

[0038] Please refer to Figure 2 The second paddle 62 has a first tooth 621 and a first actuating part 622 on its outer periphery. The first tooth 621 is connected to the drive assembly 4. The third paddle 63 has a paddle block 631 on its outer periphery, which extends between the first tooth 621 and the first actuating part 622. By integrating the first tooth 621 and the first actuating part 622 on the second paddle 62 and providing the paddle block 631 extending between the two on the third paddle 63, when the drive assembly 4 drives the second paddle 62 to rotate forward or backward through the first tooth 621, the sides of its first actuating part 622 and the first tooth 621 can push the paddle block 631 from the forward and reverse directions respectively, thereby transmitting power to the third paddle 63, which in turn drives the square tongue 31 to move. When operated manually, such as by using a key to drive the third paddle 63 to rotate, the space between the first tooth 621 and the first actuating part 622 allows the paddle block 631 to rotate freely, effectively avoiding interference between different power sources and preventing the mechanical structure from hindering manual operation.

[0039] Please refer to Figure 4The latch assembly 3 includes a latch 31, a fourth lever 32, and a lock cylinder 33. The lock cylinder 33 is connected to a third lever 63 via the fourth lever 32. The fourth lever 32 is connected to the latch 31 and can rotate to extend or retract the latch 31. The lock cylinder 33 is rotatably housed within the housing 1 and is used to drive the latch 31 to extend or retract via a key. The drive connection between the lock cylinder 33, the fourth lever 32, and the third lever 63 allows the user to either turn the lock cylinder 33 with a key or control the extension or retraction of the latch 31 via the rotation of the fourth lever 32 through the drive assembly 4, thus integrating mechanical key and electric control operation methods in the structure.

[0040] In this embodiment, the square tongue 31 is provided with a track groove 311, and the fourth paddle 32 is provided with a toggle arm 321, on which a column 322 extending into the track groove 311 is provided. By providing the track groove 311 on the square tongue 31 and the column 322 embedded in the track groove 311 on the toggle arm 321 of the fourth paddle 32, when the fourth paddle 32 rotates, the column 322 slides along the track groove 311, thereby converting the rotational motion of the fourth paddle 32 into the linear extension and retraction motion of the square tongue 31.

[0041] The lock cylinder 33 has a second tooth 331 on its outer periphery, and the fourth lever 32 has a third tooth 323 on its outer periphery. The third tooth 323 meshes with the second tooth 331. By meshing the second tooth 331 on the outer periphery of the lock cylinder 33 with the third tooth 323 on the outer periphery of the fourth lever 32, a stable transmission from the lock cylinder 33 to the fourth lever 32 can be achieved.

[0042] The third paddle 63 has a fourth tooth 632 on its outer periphery, and the fourth paddle 32 has a fifth tooth 324 on its outer periphery. The fifth tooth 324 engages with the fourth tooth 632. By providing the fourth tooth 632 on the third paddle 63 and engaging with the fifth tooth 324 on the fourth paddle 32, the drive assembly 4 can drive the square tongue 31 to extend and retract via the third paddle 63.

[0043] In this embodiment, a torsion spring 11 is provided between the third paddle 63 and the fourth paddle 32. The torsion spring 11 provided between the third paddle 63 and the fourth paddle 32 provides a continuous torque for these two key transmission components by utilizing the preload of the torsion spring 11, which can reduce the force required for the extension and retraction of the tongue 21, reduce the load on the drive assembly 4, and optimize the feel of manual operation.

[0044] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric anti-theft door lock, characterized in that, Includes a housing, within which are provided a slanted tongue assembly, a square tongue assembly, a drive assembly, a handle shaft, and a paddle assembly; The paddle assembly is sleeved on the handle shaft and includes a first paddle connected to the oblique tongue assembly, a second paddle connected to the drive assembly, and a third paddle connected to the square tongue assembly; The first paddle is configured to rotate synchronously with the handle shaft to drive the tongue assembly to extend or retract into the housing; the second and third paddles are configured to rotate independently relative to the handle shaft, and the drive assembly drives the third paddle to rotate via the second paddle, thereby driving the tongue assembly to extend or retract into the housing.

2. The electric anti-theft door lock according to claim 1, characterized in that, The outer circumferential surface of the handle shaft is provided with multiple protrusions, and the inner circumferential surface of the first paddle is provided with multiple grooves. The protrusions are embedded into the corresponding grooves so that the first paddle rotates synchronously with the handle shaft.

3. The electric anti-theft door lock according to claim 2, characterized in that, The plurality of protrusions are arranged at equal angles with the center of the handle shaft as the axis.

4. The electric anti-theft door lock according to claim 1, characterized in that, The oblique tongue assembly includes an oblique tongue, a connecting rod, a return spring, and a baffle. The oblique tongue and the baffle are respectively disposed at both ends of the connecting rod. The return spring is sleeved on the connecting rod. The first paddle drives the oblique tongue to extend and retract through the baffle.

5. The electric anti-theft door lock according to claim 1, characterized in that, The second paddle has a first tooth and a first actuating part on its outer periphery. The first tooth is connected to the drive assembly. The third paddle has a paddle block on its outer periphery, which extends between the first tooth and the first actuating part.

6. The electric anti-theft door lock according to claim 5, characterized in that, The latch assembly includes a latch, a fourth lever, and a lock cylinder. The lock cylinder is connected to the third lever via the fourth lever. The fourth lever is connected to the latch and can rotate to extend or retract the latch.

7. The electric anti-theft door lock according to claim 6, characterized in that, The square tongue is provided with a track groove, the fourth lever is provided with a lever arm, and the lever arm is provided with a column that extends into the track groove.

8. The electric anti-theft door lock according to claim 6, characterized in that, The lock cylinder has a second tooth on its outer periphery, and the fourth lever has a third tooth on its outer periphery, the third tooth engaging with the second tooth.

9. The electric anti-theft door lock according to claim 6, characterized in that, The third paddle has a fourth tooth on its outer periphery, and the fourth paddle has a fifth tooth on its outer periphery, the fifth tooth engaging with the fourth tooth.

10. The electric anti-theft door lock according to claim 6, characterized in that, A torsion spring is provided between the third and fourth paddles.

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