Noise reduction lock

Abstract

The utility model relates to the technical field of locksets, and discloses a noise reduction lockset which comprises a shell, a lock cylinder, a lock cylinder and a noise reduction device. The latch bolt assembly is arranged in the shell in a sliding mode and comprises a latch bolt capable of stretching out and drawing back in the spring bolt hole. The friction tongue is rotationally arranged on the inclined tongue, the inner end of the friction tongue is located in the shell, and a limiting block extending to the periphery of the spring bolt hole is formed in the friction tongue; the first buffer part is arranged on the limiting block and comprises an abutting part which is located on the side, close to the side wall, of the limiting block. According to the noise reduction lock, the first buffer part is arranged in the friction tongue, the abutting part can be formed between the limiting block and the side wall of the shell, when the friction tongue moves outwards or rotates, the abutting part replaces the limiting block to collide and rub with the side wall of the shell, collision noise and friction noise can be remarkably reduced, and it is ensured that the noise reduction lock cannot be damaged when used daily. And no large noise is generated inside.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, and in particular to a noise reduction lock. Background Art

[0002] When the lock is in use, the collision and friction between its components will produce certain noises. For example, when the inclined bolt assembly is extended, it will collide with the lock shell. When the door is closed, the friction tongue will collide with the lock bolt shell. Utility Model Content

[0003] The utility model is made to solve the above technical problems, and one of its purposes is to provide a noise reduction lock that can reduce the noise generated by the operation of its internal structure.

[0004] According to one embodiment of the utility model, a noise reduction lock is provided, comprising: a shell, a side wall of which is formed with a lock tongue hole; an inclined tongue assembly, slidably arranged in the shell, comprising an inclined tongue that can be extended and retracted in the lock tongue hole; a friction tongue, rotatably arranged on the inclined tongue, the inner end of which is located in the shell and is formed with a limit block extending to the outer periphery of the lock tongue hole; a first buffer member, arranged on the limit block, comprising an abutment portion located on one side of the limit block close to the side wall.

[0005] As an embodiment, a mounting groove is formed in the middle of the limit block; and the first buffer member further includes a mounting portion arranged in the mounting groove.

[0006] As an embodiment, the friction tongue is rotatably connected to the oblique tongue via a first shaft, and the mounting portion is sleeved on the first shaft.

[0007] As an embodiment, an arc-shaped guide surface is provided between the end surface of the abutment portion away from the rotation axis of the friction tongue and the side surface opposite to the side wall.

[0008] As an embodiment, a limit plate is provided in the shell; the inclined tongue assembly also includes: a pull rod, which is passed through the limit plate, one end of which is connected to the inclined tongue, and the other end of which is provided with a guide plate slidably connected to the inner wall of the shell; a second buffer member, which is sleeved on the pull rod and is located between the limit plate and the guide plate.

[0009] As an embodiment, it further includes: a return spring, which is sleeved on the pull rod and applies a force toward the outside to the inclined tongue.

[0010] As an embodiment, a slide groove is formed on the inner wall of the shell, and one end of the guide plate is slidably disposed in the slide groove.

[0011] As an embodiment, it further includes: a third buffer member, which is arranged on the guide plate and has a friction portion located between the guide plate and the slide groove.

[0012] As an embodiment, the third buffer member is sleeved on the guide plate.

[0013] As an embodiment, it further includes: a second locking tongue, which is slidably arranged in the shell, and a protruding buffer strip is arranged on the collision surface of the second locking tongue.

[0014] According to the above description and practice, the noise reduction lock described in the utility model is provided with a first buffer member in the friction tongue, which can form an abutment portion between the limit block and the side wall of the shell. When the friction tongue moves outward or rotates, the abutment portion replaces the limit block to collide and rub with the side wall of the shell, which can significantly reduce the collision noise and friction noise, ensuring that the noise reduction lock will not have loud noise inside during daily use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a three-dimensional structural schematic diagram of a noise reduction lock involved in one embodiment of the utility model.

[0016] Figure 2 The present invention is a schematic structural diagram of a latch bolt assembly in a noise reduction lock according to an embodiment of the present invention.

[0017] Figure 3 The figure is a schematic diagram of the exploded structure of the inclined bolt assembly in the noise reduction lock involved in one embodiment of the utility model.

[0018] The reference numerals in the figure are:

[0019] 1. Shell; 2. Slant tongue assembly; 3. Friction tongue; 4. First buffer; 5. First axis; 6. Second lock tongue; 7. Buffer strip; 11. Side wall; 12. Limit plate; 13. Slide groove; 21. Slant tongue; 22. Pull rod; 23. Second buffer; 24. Guide plate; 241. Slider; 25. Return spring; 26. Third buffer; 261. Friction part; 31. Limit block; 32. Mounting groove; 41. Abutment part; 42. Guide surface; 43. Mounting part. DETAILED DESCRIPTION

[0020] The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and fully convey the concepts of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] In addition, the accompanying drawings are only schematic diagrams of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated descriptions will be omitted. It should be noted that in the present disclosure, the terms "including", "configured with", and "set in" are used to express the meaning of open-ended inclusion, and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc.; the terms "first", "second", etc. are only used as marks, and are not restrictions on the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0022] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0023] In this embodiment, a noise reduction lock is disclosed. Please refer to Figures 1 to 3 The noise reduction lock in this embodiment mainly includes a housing 1, a latch bolt assembly 2, a friction tongue 3 and a first buffer 4. The housing 1 is formed by buckling two half shells, and is used to accommodate the latch bolt assembly 2, the friction tongue 3 and the first buffer 4. Figure 1 Only one half of the structure is shown in the figure. A bolt hole is provided on one side wall 11 of the housing 1 for the oblique bolt 21 and the friction bolt 3 to pass through. The oblique bolt assembly 2 is slidably arranged in the housing 1, and includes an oblique bolt 21 that can be extended and retracted in the bolt hole. Figure 1 As shown, the left end of the inclined tongue assembly 2 is an inclined tongue 21 arranged in the lock tongue hole. The inclined tongue 21 can extend out of the housing 1 or retract into the housing 1 through the lock tongue hole to achieve locking and unlocking.

[0024] The friction tongue 3 is rotatably arranged on the oblique tongue 21, and its inner end is in the housing 1 and is formed with a limit block 31 extending to the outer periphery of the bolt hole. The first buffer 4 is arranged on the limit block 31, including an abutment portion 41 located on the side of the limit block 31 close to the side wall 11. When the oblique tongue assembly 2 moves outward, the friction tongue 3 simultaneously moves outward with the oblique tongue 21 until the abutment portion 41 abuts against the side wall 11 of the housing 1, completing the position limitation of the oblique tongue assembly 2. In this process, compared with the limit block 31 directly colliding with the side wall 11 of the housing 1, the abutment portion 41 abuts against the side wall 11 of the housing 1, which can significantly reduce the collision noise. In addition, when the lock is closed, the friction tongue 3 is pushed by the buckle box on the door frame and rotates. If the limit block 31 at the inner end is not provided with the above-mentioned first buffer 4, it will directly rub against the side wall 11 of the housing 1, generating a large noise. In this embodiment, the abutment portion 41 is provided between the limit block 31 and the side wall 11 of the shell 1. When the friction tongue 3 rotates, the abutment portion 41 rubs against the side wall 11 of the shell 1, which can significantly reduce friction noise.

[0025] As an embodiment, a mounting groove 32 is formed in the middle of the limit block 31, and the first buffer member 4 also includes a mounting portion 43 disposed in the mounting groove 32. The mounting portion 43 can be connected to the mounting groove 32 by means of snap connection, bonding, bolting, etc., which can ensure that the first buffer member 4 has good stability when in use and is not prone to falling off. For example, in this embodiment, the friction tongue 3 is rotatably connected to the oblique tongue 21 via the first shaft 5, and the mounting portion 43 is sleeved on the first shaft 5, which can realize that the first buffer member 4 and the friction tongue 3 are firmly connected to the oblique tongue 21. Furthermore, the first buffer member 4 and the first shaft 5 are connected in an interference fit manner, which can improve the stability of the first buffer member 4.

[0026] In other embodiments, the abutting portion 41 of the first buffer member 4 may also be directly bonded or clamped to the side of the limiting block 31 opposite to the side wall 11 of the shell 1 , which can also play the role of fixing the abutting portion 41 and the first buffer member 4 .

[0027] As an embodiment, an arc-shaped guide surface 42 is provided between the end surface of the abutting portion 41 away from the rotation axis of the friction tongue 3 and the side surface opposite to the side wall 11. During the locking process, the friction tongue 3 rotates, and the arc-shaped guide surface 42 gradually contacts the side wall 11 of the housing 1, which can reduce friction resistance, make the door closing process smoother, and further reduce friction noise. Specifically, Figure 2 and Figure 3 As shown, there is an arc-shaped guide surface 42 between the upper end surface and the left side surface of the abutment portion 41. During the door closing process, when the abutment portion 41 rotates counterclockwise around the first axis 5 along with the friction tongue 3, the guide surface 42 gradually abuts against the side wall 11 of the shell 1. Compared with the case where the guide surface 42 is not provided, the friction resistance is obviously reduced, and the corresponding friction noise will also be lower.

[0028] In this embodiment, a limiting plate 12 is further provided in the housing 1, and the latch bolt assembly 2 further includes a pull rod 22 and a second buffer member 23. Figure 1 and Figure 2 As shown, the limit plate 12 is fixed on the inner wall of the housing 1, and a through hole is provided in the middle part for the pull rod 22 to pass through, and the pull rod 22 is slidably arranged in the through hole. The left end of the pull rod 22 is connected to the inclined tongue 21, and the right end of the pull rod 22 is provided with a guide plate 24 slidably connected to the inner wall of the housing 1, so that the entire inclined tongue assembly 2 can slide stably in the housing 1. The second buffer 23 is sleeved on the pull rod 22 and is located between the limit plate 12 and the guide plate 24. When the inclined tongue assembly 2 moves outward as a whole, the second buffer 23 replaces the guide plate 24 to abut against the limit plate 12, which can reduce the collision noise between the components.

[0029] As an embodiment, a return spring 25 is also sleeved on the pull rod 22, which applies an outward force to the inclined tongue 21. When the lock is not subjected to external force, the inclined tongue 21 extends out of the housing 1 under the action of the return spring 25, and the entire inclined tongue assembly 2 is fixed in the housing 1, which is not easy to cause noise due to shaking. Specifically, in this embodiment, the two ends of the return spring 25 are respectively against the inclined tongue 21 and the limit plate 12, and can stably apply an outward force to the inclined tongue 21.

[0030] As an embodiment, a slide groove 13 is formed on the inner wall of the housing 1, and one end of the guide plate 24 is slidably disposed in the slide groove 13. Figure 2 As shown, two opposite end surfaces of the guide plate 24 are formed with outwardly protruding sliders 241, which cooperate with the slide grooves 13 on the inner wall of the housing 1, so that the latch bolt assembly can slide stably in the housing 1. In other embodiments, a plurality of similar pull rods 22 and limit plates 12 may be used to cooperate, or a gear rack and the like may be used to achieve the sliding assembly of the latch bolt assembly 2 and the housing 1.

[0031] Furthermore, in this embodiment, a third buffer member 26 is provided on the guide plate 24, which has a friction portion 261 located between the guide plate 24 and the slide groove 13. When the guide plate 24 slides along the slide groove 13, the two will not contact directly, but will contact indirectly via the friction portion 261 of the third buffer member 26, which can reduce the friction noise in the process.

[0032] Specifically, Figure 2As shown, the third buffer 26 is sleeved on the guide plate 24, and the upper and lower ends thereof are formed with friction parts 261 covering the slider 241. The friction parts 261 are in the slide groove 13 when in use, which can reduce friction noise. In other embodiments, the third buffer 26 can also be bonded, clamped, or bolted to the guide plate 24, and the technical effect of reducing friction noise can be achieved as long as the friction part 261 is located between the guide plate 24 and the slide groove 13.

[0033] As an implementation method, Figure 1 As shown, in this embodiment, a second lock tongue 6 is also slidably arranged in the shell 1, and an outwardly protruding buffer strip 7 is provided on the collision surface of the second lock tongue 6. By providing the buffer strip 7, the direct contact between the buckle box in the door frame and the second lock tongue 6 is changed to direct contact between the buckle box and the buffer strip 7, which then drives the second lock tongue 6 to move, and can significantly reduce the noise generated by the collision contact between the second lock tongue 6 and the buckle box.

[0034] It should be noted that the buffer structures of the first buffer member 4, the second buffer member 23, the third buffer member 26 and the buffer strip 7 are made of flexible materials, such as sponge, rubber, plastic, silicone, etc. When it collides or rubs with other structures, no obvious noise will occur. Compared with the case where these buffer structures are not provided, the noise reduction lock can significantly reduce the noise generated during operation. In addition, in some embodiments, there is a case where the friction tongue 3 is directly provided as a flexible material similar to the first buffer member 4, which can also achieve a certain effect of reducing noise. However, in this case, since the outer end of the friction tongue 3 is also a flexible material, it is easy to generate greater resistance in the process of contacting the door frame when the door is closed when it is applied to the door lock, and it is not easy to rotate, which affects normal use. In contrast, in the present utility model, not only will it not affect the normal use of the lock, but it can also reduce the noise generated by the internal operation of the lock.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A noise reduction lock, characterized in that: include: The housing has a locking bolt hole formed on one side wall; An oblique tongue assembly is slidably disposed in the housing and comprises an oblique tongue capable of extending and retracting in the lock tongue hole; A friction tongue is rotatably mounted on the oblique tongue, the inner end of which is located in the housing and is formed with a stopper extending to the outer periphery of the lock tongue hole; The first buffer is arranged on the limiting block and comprises an abutting portion located on a side of the limiting block close to the side wall.

2. The noise reduction lock according to claim 1, characterized in that: A mounting groove is formed in the middle of the limit block; The first buffer member further includes a mounting portion disposed in the mounting groove.

3. The noise reduction lock according to claim 2, characterized in that: The friction tongue is rotatably connected to the oblique tongue via a first shaft, and the mounting portion is sleeved on the first shaft.

4. The noise reduction lock according to claim 1, characterized in that: An arc-shaped guide surface is provided between the end surface of the abutment portion away from the rotation axis of the friction tongue and the side surface opposite to the side wall.

5. The noise reduction lock according to claim 1, characterized in that: A limiting plate is provided in the housing; The latch bolt assembly also includes: A pull rod is inserted into the limit plate, one end of which is connected to the oblique tongue and the other end of which is provided with a guide plate slidably connected to the inner wall of the shell; The second buffer is sleeved on the pull rod and is located between the limiting plate and the guide plate.

6. The noise reduction lock according to claim 5, characterized in that: Also includes: A return spring is sleeved on the pull rod and applies an outward force to the oblique tongue.

7. The noise reduction lock according to claim 5, characterized in that: A slide groove is formed on the inner wall of the shell, and one end of the guide plate is slidably disposed in the slide groove.

8. The noise reduction lock according to claim 7, characterized in that: Also includes: A third buffer is disposed on the guide plate and has a friction portion located between the guide plate and the slide groove.

9. The noise reduction lock according to claim 8, characterized in that: The third buffer member is sleeved on the guide plate.

10. The noise reduction lock according to claim 1, characterized in that: Also includes: The second locking tongue is slidably arranged in the housing, and a protruding buffer strip is arranged on the collision surface of the second locking tongue.

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