Silent lock

Abstract

The application discloses a mute lock, which comprises a lock shell, a latch, a first elastic member and a second elastic member. The latch is slidably connected with the lock shell. The latch has a first retracted position in the lock shell and a first extended position at least partially protruding out of the lock shell. The first elastic member is connected with the latch and the lock shell and presses the latch towards the first extended position. The second elastic member is connected with the latch and the lock shell and presses the latch towards the first retracted position. When the latch is in the first extended position, the elastic force of the first elastic member is equal to the elastic force of the second elastic member. The mute lock has the advantages of wide application range, high appearance degree of the side strip and avoidance of complex machining and assembling operations.

Description

Technical Field

[0001] This invention relates to the field of door lock technology, and more specifically, to a silent lock. Background Technology

[0002] The noise from the lock itself and the impact of the bolt against the door frame when the door is opened and closed significantly disturbs residents' rest and reduces the user experience.

[0003] Among related technologies, using magnetic door locks for noise reduction has low security and is generally only applicable to internal door locks. Using plastic sleeves on side strips for noise reduction increases the complexity of processing and assembly, and also reduces the aesthetic appeal of the side strips. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a silent lock, which has the advantages of wide applicability, aesthetically pleasing side strips, and avoidance of complex processing and assembly operations.

[0005] A silent lock according to an embodiment of the present invention includes a lock housing, a latch, a first elastic element, and a second elastic element. The latch is slidably connected to the lock housing. The latch has a first retracted position located inside the lock housing and a first extended position at least partially protruding outside the lock housing. The first elastic element connects the latch and the lock housing and presses the latch toward the first extended position. The second elastic element connects the latch and the lock housing and presses the latch toward the first retracted position. When the latch is in the first extended position, the elastic force of the first elastic element is equal to the elastic force of the second elastic element.

[0006] According to the embodiments of the present invention, the silent lock is not limited by the installation environment and has a wider range of applications. Furthermore, the silent lock in this embodiment eliminates the need to modify the side strips, ensuring both the aesthetic appearance of the side strips and avoiding complex processing and assembly operations.

[0007] In some embodiments, the silent lock further includes a first guide shaft, a first baffle, and a movable plate. A first end of the first guide shaft is connected to the latch. The first baffle is fixed inside the lock housing and has a first through hole suitable for the first guide shaft to slide through. The first elastic element includes a first spring sleeved on the first guide shaft and pressed between the latch and the first baffle. The movable plate is located on the side of the first baffle away from the latch and is connected to a second end of the first guide shaft. The second elastic element includes a second spring sleeved on the first guide shaft and pressed between the first baffle and the movable plate.

[0008] In some embodiments, the silent lock further includes a detection tongue, a third elastic element, and a paddle. The detection tongue is slidably fitted within the lock housing. The detection tongue has a second retracted position within the lock housing and a second extended position that at least partially protrudes outside the lock housing. The direction in which the detection tongue slides toward the second retracted position is consistent with the direction in which the latch slides toward the first retracted position. The third elastic element connects the detection tongue and the lock housing and presses the detection tongue toward the second extended position. The paddle is located within the lock housing and connected to the detection tongue. The latch has a limiting surface facing the first baffle, and at least a portion of the paddle abuts against the limiting surface.

[0009] In some embodiments, the silent lock further includes a second guide shaft and a second baffle, the first end of the second guide shaft being connected to the detection tongue; the second baffle is fixedly disposed within the lock housing, and the second baffle is provided with a second through hole through which the second guide shaft slides; the third elastic element includes a third spring sleeved on the second guide shaft, and the third spring is pressed between the second baffle and the detection tongue.

[0010] In some embodiments, the silent lock further includes a latch assembly and a first buffer member, the latch assembly being slidably connected to the lock housing, the latch assembly having a third retracted position located within the lock housing and a third extended position at least partially protruding outside the lock housing; the first buffer member is fixed within the lock housing, and the latch assembly abuts against the first buffer member at the third retracted position.

[0011] In some embodiments, the latch assembly includes a latch and a connecting frame, the number of latches being multiple and spaced apart along the length of the lock housing, each of the multiple latches being slidably connected to the lock housing, the connecting frame being located inside the lock housing and having a first end connected to each of the multiple latches, and a second end of the connecting frame abutting against the first buffer at the third retracted position.

[0012] In some embodiments, the silent lock includes a second buffer member, which is placed inside the lock housing and fixed between any two adjacent latches. When the latch assembly is in the third extended position, the second buffer member is sandwiched between the peripheral wall of the lock housing and the connecting frame.

[0013] In some embodiments, the first buffer includes a support shaft and a flexible sleeve, the support shaft being fixed inside the lock housing, the flexible sleeve being sleeved on the support shaft, and the second end of the connecting frame abutting against the flexible sleeve at the third retracted position; the second buffer includes a flexible block.

[0014] In some embodiments, the silent lock further includes a pin and an anti-tamper hook. The latch has a mounting groove and a first shaft hole. The first shaft hole extends along the length of the lock housing and communicates with the mounting groove. The pin is connected to the latch through the first shaft hole and the mounting groove. The anti-tamper hook has a second shaft hole. The anti-tamper hook is sleeved on the pin through the second shaft hole and pivotally engaged with the pin in the mounting groove.

[0015] In some embodiments, a damping agent is filled between the wall of the second shaft hole and the outer peripheral surface of the pin, or the outer peripheral surface of the pin is provided with a damping coating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a silent lock according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the latch portion of a silent lock according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the detection tongue portion of a silent lock according to an embodiment of the present invention.

[0019] Reference numerals: 1. Lock case; 2. Slanted latch; 21. First elastic element; 211. First spring; 22. Second elastic element; 221. Second spring; 23. First guide shaft; 24. First baffle; 25. Movable plate; 26. Limiting surface; 27. Mounting groove; 28. First shaft hole; 3. Detection tongue; 31. Third elastic element; 311. Third spring; 32. Paddle; 33. Second guide shaft; 4. Square tongue assembly; 41. First buffer element; 411. Support shaft; 412. Flexible sleeve; 42. Square tongue; 43. Connecting frame; 44. Second buffer element; 441. Flexible block; 5. Pin; 6. Anti-disassembly hook; 61. Second shaft hole. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following is combined with Figures 1-3 A silent lock according to an embodiment of the present invention is described.

[0022] The silent lock according to an embodiment of the present invention includes a lock housing 1, a latch 2, a first elastic element 21, and a second elastic element 22. The latch 2 is slidably connected to the lock housing 1. The latch 2 has a first retracted position located inside the lock housing 1 and a first extended position at least partially protruding outside the lock housing 1. The first elastic element 21 connects the latch 2 and the lock housing 1 and presses the latch 2 toward the first extended position. The second elastic element 22 connects the latch 2 and the lock housing 1 and presses the latch 2 toward the first retracted position. When the latch 2 is in the first extended position, the elastic force of the first elastic element 21 is equal to the elastic force of the second elastic element 22.

[0023] According to an embodiment of the silent lock of the present invention, when locking or unlocking, the latch 2 is pressed by an external force and moves from the first extended position to the first retracted position, and the elastic forces of the first elastic element 21 and the second elastic element 22 are no longer balanced. After the external force is released, the latch 2 returns to its original position under the combined force of the first elastic element 21 and the second elastic element 22. When the latch 2 returns to the first extended position, the first elastic element 21 and the second elastic element 22 play a buffering and shock-absorbing role for the moving latch 2, assisting the latch 2 to move back and forth near the first extended position until the kinetic energy of the latch 2 is exhausted and it stops at the first extended position.

[0024] Therefore, the first elastic element 21 and the second elastic element 22 reduce the impact force of the lock tongue when it is reset, avoid mechanical collision and violent friction between the lock tongue and mechanical parts (such as the door latch when locking), thereby reducing the noise when opening and closing the lock and achieving a silent effect.

[0025] Furthermore, the silent lock in this embodiment is not limited by the installation environment, making it more widely applicable. In addition, the silent lock in this embodiment eliminates the need to modify the side strips, ensuring both the aesthetic appearance of the side strips and avoiding complex processing and assembly operations.

[0026] Understandably, in the first extended position, the force exerted by the first elastic element 21 on the oblique tongue 2 and the force exerted by the second elastic element 22 on the oblique tongue 2 are balanced.

[0027] In some embodiments, the silent lock further includes a first guide shaft 23, a first baffle 24, and a movable plate 25. The first end of the first guide shaft 23 is connected to the latch 2. The first baffle 24 is fixed inside the lock housing 1 and has a first through hole suitable for the first guide shaft 23 to slide through. The first elastic element 21 includes a first spring 211 sleeved on the first guide shaft 23 and pressed between the latch 2 and the first baffle 24. The movable plate 25 is located on the side of the first baffle 24 opposite to the latch 2 and is connected to the second end of the first guide shaft 23. The second elastic element 22 includes a second spring 221 sleeved on the first guide shaft 23 and pressed between the first baffle 24 and the movable plate 25.

[0028] Thus, the cooperation between the first guide shaft 23 and the first through hole restricts the sliding direction of the oblique tongue 2, ensuring the reliability of the oblique tongue 2 sliding between the first extended position and the first retracted position. The first spring 211 and the second spring 221 dampen and buffer the oblique tongue 2 during reset, ensuring the stability of the oblique tongue 2 sliding between the first extended position and the first retracted position, and reducing the motion noise of the oblique tongue 2.

[0029] Understandably, the diameter of the first through hole is approximately equal to the diameter of the first guide shaft 23.

[0030] Specifically, the first baffle 24 has a first end face and a second end face that are axially opposite to the first guide shaft 23. The silent lock also includes a first washer, which is disposed on the first end face of the first baffle 24. The first end of the first spring 211 abuts against the oblique tongue 2, and the second end of the first spring 211 abuts against the first end face of the first baffle 24 through the first washer.

[0031] Specifically, the silent lock also includes a second washer, which is located on the second end face of the first baffle 24. The first end of the second spring 221 abuts against the movable plate 25, and the second end of the second spring 221 abuts against the second end face of the first baffle 24 through the second washer.

[0032] In some embodiments, the silent lock further includes a detection tongue 3, a third elastic element 31, and a paddle 32. The detection tongue 3 is slidably fitted within the lock housing 1. The detection tongue 3 has a second retracted position within the lock housing 1 and a second extended position that at least partially protrudes from the lock housing 1. The direction in which the detection tongue 3 slides toward the second retracted position is consistent with the direction in which the latch 2 slides toward the first retracted position. The third elastic element 31 connects the detection tongue 3 and the lock housing 1 and presses the detection tongue 3 toward the second extended position. The paddle 32 is located within the lock housing 1 and connected to the detection tongue 3. The latch 2 has a limiting surface 26 facing the first baffle 24, and at least a portion of the paddle 32 abuts against the limiting surface 26.

[0033] Therefore, when the latch 2 is moved from the first extended position to the first retracted position by an external force, the detection tongue 3 is driven to move from the second extended position to the second retracted position through the cooperation of the limiting surface 26 and the lever 32. When the latch 2 resets, the detection tongue 3 resets under the action of the third elastic element 31, that is, returns to the second extended position. The movement of the detection tongue 3 driven by the latch 2 avoids the collision between the detection tongue 3 and the door frame when the door is opened, further reducing noise and ensuring a quiet effect.

[0034] Specifically, the first extended position and the second extended position are aligned along the length of the lock case 1, and the first retracted position and the second retracted position are aligned along the length of the lock case 1.

[0035] In some embodiments, the silent lock further includes a second guide shaft 33 and a second baffle, the first end of the second guide shaft 33 being connected to the detection tongue 3. The second baffle is fixed inside the lock housing 1 and has a second through hole through which the second guide shaft 33 slides. The third elastic member 31 includes a third spring 311 sleeved on the second guide shaft 33 and pressed between the second baffle and the detection tongue 3.

[0036] Thus, the second guide shaft 33 restricts the sliding direction of the detection tongue 3, ensuring the reliability of the sliding of the detection tongue 3, and the third spring 311 provides elastic force to the detection tongue 3 to assist in the reset of the detection tongue 3.

[0037] Understandably, the diameter of the second through hole is approximately equal to the diameter of the second guide shaft 33.

[0038] In some embodiments, the silent lock further includes a latch 42 assembly 4 and a first buffer 41, the latch 42 assembly 4 and the lock housing 1 being slidably connected, the latch 42 assembly 4 having a third retracted position located within the lock housing 1 and a third extended position at least partially protruding outside the lock housing 1. The first buffer 41 is fixed within the lock housing 1, and the latch 42 assembly 4 abuts against the first buffer 41 in the third retracted position.

[0039] Thus, the first buffer 41 limits the retraction of the square tongue 42 component 4 and buffers the retraction movement of the square tongue 42 component 4, avoiding rigid collisions of the square tongue 42 component 4 and further enhancing the noise reduction and silencing effect.

[0040] In some embodiments, the square tongue 42 assembly 4 includes a square tongue 42 and a connecting frame 43. There are multiple square tongues 42 and they are spaced apart along the length of the lock housing 1. Each of the multiple square tongues 42 is slidably connected to the lock housing 1. The connecting frame 43 is located inside the lock housing 1 and its first end is connected to each of the multiple square tongues 42. The second end of the connecting frame 43 abuts against the first buffer member 41 in a third retracted position.

[0041] Therefore, the connecting frame 43 is used to drive the synchronous movement of multiple square tongues 42. The design of multiple square tongues 42 further enhances the safety of the silent lock. The first buffer 41 is used to limit the retraction of the connecting frame 43.

[0042] Specifically, the oblique tongue 2, the detection tongue 3, and multiple square tongues 42 are arranged at intervals along the length of the lock case 1.

[0043] For ease of understanding, Figure 1 Arrow A in the diagram indicates the length direction of lock case 1.

[0044] In some embodiments, the silent lock includes a second buffer 44, which is placed inside the lock housing 1 and fixed between any two adjacent square tongues 42. When the square tongue 42 assembly 4 is in the third extended position, the second buffer 44 is sandwiched between the peripheral wall of the lock housing 1 and the connecting frame 43.

[0045] Thus, the first buffer 41 limits the extension of the square tongue 42 component 4 and buffers the extension movement of the square tongue 42 component 4, avoiding rigid collisions of the square tongue 42 component 4 and further enhancing the noise reduction and silencing effect.

[0046] In some embodiments, the first buffer 41 includes a support shaft 411 and a flexible sleeve 412. The support shaft 411 is fixed inside the lock housing 1, and the flexible sleeve 412 is sleeved on the support shaft 411. The second end of the connecting frame 43 abuts against the flexible sleeve 412 in the third retracted position. The second buffer 44 includes a flexible block 441.

[0047] Thus, the flexible sleeve 412 provides flexible buffering for the retraction of the connecting frame 43, and the flexible block 441 provides flexible buffering for the extension of the connecting frame 43.

[0048] Specifically, the flexible sleeve 412 can be made of materials such as rubber, silicone, or sponge.

[0049] Specifically, the flexible block 441 can be made of materials such as rubber, silicone, or sponge.

[0050] In some embodiments, the silent lock further includes a pin 5 and an anti-tamper hook 6. The latch 2 has a mounting groove 27 and a first shaft hole 28. The first shaft hole 28 extends along the length of the lock housing 1 and communicates with the mounting groove 27. The pin 5 is connected to the latch 2 through the first shaft hole 28 and the mounting groove 27. The anti-tamper hook 6 has a second shaft hole 61. The anti-tamper hook 6 is sleeved on the pin 5 through the second shaft hole 61 and pivotally engaged with the pin 5 within the mounting groove 27.

[0051] Therefore, the anti-tamper hook 6 can rotate appropriately within the mounting groove 27 relative to the oblique tongue 2, ensuring the protective effect of the anti-tamper hook 6 on the oblique tongue 2, improving the security of the oblique tongue 2, and enhancing the anti-theft performance of the oblique tongue 2.

[0052] Specifically, the mounting groove 27 is located in the middle of the oblique tongue 2.

[0053] Specifically, there are two first shaft holes 28, which are located on both sides of the mounting groove 27.

[0054] In some embodiments, a damping agent is filled between the wall of the second shaft hole 61 and the outer peripheral surface of the pin 5, or the outer peripheral surface of the pin 5 is provided with a damping coating.

[0055] Therefore, the damping agent / damping coating reduces the rebound speed of the anti-tamper hook 6, further enhancing the noise reduction and silencing effect.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0057] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A silent lock, characterized in that, include: Lock case; A latch, which is slidably connected to the lock housing, has a first retracted position inside the lock housing and a first extended position that is at least partially protruding outside the lock housing; and A first elastic element and a second elastic element, wherein the first elastic element connects the latch and the lock housing and presses the latch toward the first extended position, and the second elastic element connects the latch and the lock housing and presses the latch toward the first retracted position; when the latch is in the first extended position, the elastic force of the first elastic element is equal to the elastic force of the second elastic element. A first guide shaft, the first end of which is connected to the oblique tongue; The first baffle is fixed inside the lock housing and has a first through hole suitable for the first guide shaft to slide through. The first elastic element includes a first spring sleeved on the first guide shaft and is pressed between the oblique tongue and the first baffle. and The movable plate is located on the side of the first baffle away from the oblique tongue and is connected to the second end of the first guide shaft. The second elastic element includes a second spring sleeved on the first guide shaft, and the second spring is pressed between the first baffle and the movable plate. The detection tongue is slidably fitted within the lock housing. The detection tongue has a second retracted position within the lock housing and a second extended position that at least partially protrudes outside the lock housing. The direction in which the detection tongue slides toward the second retracted position is the same as the direction in which the oblique tongue slides toward the first retracted position. A third elastic element connects the detection tongue and the locking shell and presses the detection tongue toward the second extended position; and A paddle, located within the lock housing and connected to the detection tongue, the oblique tongue having a limiting surface facing the first baffle, at least a portion of the paddle abutting against the limiting surface.

2. The silent lock according to claim 1, characterized in that, The silent lock also includes: A second guide shaft, the first end of which is connected to the detection tongue; and The second baffle is fixed inside the lock housing and has a second through hole through which the second guide shaft slides. The third elastic element includes a third spring sleeved on the second guide shaft and pressed between the second baffle and the detection tongue.

3. The silent lock according to claim 1, characterized in that, The silent lock also includes: A latch assembly, slidably connected to the lock housing, the latch assembly having a third retracted position within the lock housing and a third extended position at least partially protruding from the lock housing; and The first buffer is fixed inside the lock housing, and the square tongue assembly abuts against the first buffer at the third retracted position.

4. The silent lock according to claim 3, characterized in that, The latch assembly includes a latch and a connecting frame. There are multiple latches that are spaced apart along the length of the lock housing. Each of the multiple latches is slidably connected to the lock housing. The connecting frame is located inside the lock housing and its first end is connected to each of the multiple latches. The second end of the connecting frame abuts against the first buffer at the third retracted position.

5. The silent lock according to claim 4, characterized in that, The silent lock includes a second buffer member, which is placed inside the lock housing and fixed between any two adjacent square tongues. When the square tongue assembly is in the third extended position, the second buffer member is sandwiched between the peripheral wall of the lock housing and the connecting frame.

6. The silent lock according to claim 5, characterized in that, The first buffer component includes a support shaft and a flexible sleeve. The support shaft is fixed inside the lock housing, and the flexible sleeve is sleeved on the support shaft. The second end of the connecting frame abuts against the flexible sleeve at the third retracted position. The second buffer component includes a flexible block.

7. The silent lock according to claim 1, characterized in that, The silent lock also includes: A pin, wherein the latch has a mounting groove and a first shaft hole, the first shaft hole extending along the length of the lock housing and communicating with the mounting groove, and the pin is connected to the latch via the first shaft hole and the mounting groove; and The anti-tamper hook is provided with a second shaft hole, and the anti-tamper hook is sleeved on the pin through the second shaft hole and pivotally engaged with the pin in the mounting groove.

8. The silent lock according to claim 7, characterized in that, The wall of the second shaft hole and the outer peripheral surface of the pin are filled with a damping agent, or the outer peripheral surface of the pin is provided with a damping coating.

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