Silent buffer lock

Abstract

The application provides a mute buffer lock body, which comprises a lock body outer lining plate, a lock body box bottom assembly, a tongue peach mechanism, a latch assembly, a lock body box cover, the lock body box bottom assembly comprises a box bottom and a lock body inner lining plate; further comprising: a latch damper, a latch silencer block is embedded on the lock body inner lining plate, the latch assembly comprises a latch assembly mute buffer mechanism, the latch peach mechanism comprises a latch peach silencer assembly, noise generated by the latch assembly during use is eliminated through the latch assembly mute buffer mechanism, the latch damper, the latch silencer block and the latch peach silencer assembly. By using the application, the problem that noise is generated by the impact or friction between components of the lock body when the door is closed or opened can be solved.

Description

[0001] This invention is a divisional application of Chinese patent application filed on July 19, 2017, with application number 201710587936.2 and invention title "Silent Buffer Lock Body". Technical Field

[0002] This invention relates to the field of door lock technology for buildings and homes, and particularly to lock bodies, especially quiet, buffered lock bodies with low noise. Background Technology

[0003] Currently, door locks used in the home furnishing sector typically have metal components. During opening and closing, the impact or friction between these components generates noise. Common solutions to reduce noise focus on the bolt, the part most prone to impact, directly mitigating the impact or improving the components it contacts. This has had a positive effect on reducing noise during closing. However, the noise generated during closing is not solely due to the extension and retraction of the latch; a significant portion also arises from friction between internal lock components. For double-latch locks, the extension and retraction of the square latch also contributes to the noise. To address these issues, this invention proposes a silent, buffered lock body. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a silent buffer lock body to solve the problem of noise caused by the impact or friction between the various components of the lock body when closing or opening the door.

[0005] This invention provides a silent buffer lock body, comprising: an outer liner plate, a lock body bottom assembly, a latch bolt mechanism, a latch bolt assembly, and a lock body cover. The lock body bottom assembly includes a bottom and an inner liner plate disposed on the bottom of the bottom. It also includes a latch bolt damper.

[0006] A latch silencer block is embedded in the lock body liner; the latch assembly includes a latch assembly silent buffer mechanism; and the latch lever mechanism includes a latch lever silencer assembly.

[0007] The noise generated by the tongue assembly during use is eliminated by the tongue assembly silent buffer mechanism, the tongue damper, the tongue mute block, and the tongue knocker mute assembly.

[0008] Furthermore, a preferred embodiment further includes a square tongue assembly, which comprises: a square tongue, a square tongue plate, a square tongue paddle, sound-dampening pads disposed on both sides of the square tongue plate, and a sound-dampening pad under the square tongue plate, wherein...

[0009] A transmission plate groove is provided on the sound-absorbing pad of the square tongue plate, a slot is provided on the square tongue plate, the front end of the square tongue plate is fixed in the slot, and a sliding groove, a limiting groove, at least two positioning through holes and a guide block are provided on the square tongue plate.

[0010] A sliding post is provided at the end of the square tongue peach, and the sliding post slides within the sliding groove.

[0011] In addition, a preferred embodiment is that the tongue assembly further includes a spring, a tongue, a pull rod fixed to the rear end of the tongue, and a slider sleeved on the pull rod, wherein a positioning groove is provided in the middle of the slider, a guide post is provided at the rear, a positioning ring is provided at the rear end of the pull rod, and the positioning ring is embedded in the positioning groove.

[0012] The tongue assembly's silent buffer mechanism includes a noise-absorbing friction tongue and a limiting noise-absorbing ring sleeved on the pull rod;

[0013] The noise-canceling friction tongue is pivotally connected to the middle of the oblique tongue, and the spring is embedded in the oblique tongue and presses against the rear end of the noise-canceling friction tongue.

[0014] In addition, a preferred embodiment is to provide a positioning plate at a corresponding position on the bottom plate of the box, and to provide a U-shaped hole on the positioning plate, wherein the limiting and silencing ring is engaged in the U-shaped hole.

[0015] Furthermore, in a preferred embodiment, the oblique tongue peach-picking mechanism further includes: an oblique tongue peach and a prying plate, wherein a limiting cam is provided at the upper part of the oblique tongue peach, and a square limiting post is provided at the middle part of the oblique tongue peach.

[0016] One end of the actuating piece is provided with an actuating limiting groove, the other end is provided with a transmission handle, and the middle end is provided with a special-shaped limiting hole;

[0017] The silencing assembly for the oblique tongue-pulling mechanism includes: a lower silencing ring disposed at the lower end of the oblique tongue-pulling mechanism, a lower silencing pad and an upper silencing pad of the oblique tongue-pulling mechanism nested on the outside of the oblique tongue-pulling mechanism, and an upper silencing ring disposed at the upper end of the oblique tongue-pulling mechanism.

[0018] The upper and lower sound-absorbing pads of the oblique tongue jack are both confined within the oblique tongue jack hole at the bottom of the box. The square limiting post is inserted into the irregularly shaped limiting hole to achieve radial relative movement between the actuating plate and the oblique tongue jack.

[0019] The radial relative angle range between the actuating plate and the oblique tongue is 0° to 90°.

[0020] Furthermore, a preferred embodiment is that a slanted tongue damping gear is provided on the slanted tongue damper, and a slanted tongue mating tooth is provided on the outside of the irregularly shaped limiting hole; wherein,

[0021] The oblique tongue mating tooth engages intermittently with the oblique tongue damping gear.

[0022] In addition, a preferred embodiment is to provide a friction tongue positioning post inside the oblique tongue muffler block, the friction tongue positioning post being used to prevent the tail end of the muffler friction tongue from sliding out of the oblique tongue muffler block.

[0023] Furthermore, a preferred embodiment further includes a transmission plate, wherein a transmission groove is provided in the middle of the transmission plate, wherein...

[0024] The guide block on the square tongue plate is embedded in the transmission groove, and the upper end of the transmission plate is placed in the transmission plate groove on the sound-absorbing pad on the square tongue plate.

[0025] The guide post of the tongue assembly slides in the actuation limiting groove of the actuating plate, and the upper end of the transmission plate abuts against the transmission handle of the actuating plate to transmit the unlocking torque to the actuating plate.

[0026] Furthermore, in a preferred embodiment, the oblique tongue silencing block, the silencing friction tongue, the silencing pad on the oblique tongue pusher, the silencing pad below the oblique tongue pusher, and the silencing pad on the square tongue plate are all made of silencing plastic material.

[0027] Furthermore, a preferred embodiment is that the sound-absorbing plastic material includes any two or more of the following materials: nylon, TPE elastic plastic, TPR elastic plastic, and ABS.

[0028] As can be seen from the above technical solution, the silent buffer lock body provided by the present invention eliminates the noise generated by the latch assembly during use through the silent buffer mechanism of the latch assembly, the latch damper, the latch silencer block, and the latch pusher silencer assembly; thereby solving the problem of noise caused by the impact or friction between the various parts of the lock body when closing or opening the door.

[0029] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0030] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0031] Figure 1This is a schematic diagram of the exploded state of the silent buffer lock body according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the square tongue-and-pick structure according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of a portion of the square tongue assembly according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the oblique tongue picking structure according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the toggle switch structure according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram showing the extended states of the oblique and square tongues according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the retracted state of the oblique and square tongues according to an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the state of the muting friction tongue when the oblique tongue is retracted according to an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the state of the silencing friction tongue when the oblique tongue is extended according to an embodiment of the present invention.

[0040] The reference numerals in the attached drawings include: 1. Lock body liner;

[0041] 2. Box bottom assembly: 20. Box bottom, 21. Lock body lining plate, 22. Square tongue muffler block, 23. Stud, 24. Fixing pin, 25. Torsion spring, 26. Limiting pin, 27. Positioning plate, 271. U-shaped hole, 28. Reversing plate, 29. Angled tongue muffler block, 291. Friction tongue positioning pin;

[0042] 3. Square Tongue Assembly: 301. Buffer Groove; 31. Square Tongue; 32. Square Tongue Plate: 321. Sliding Groove; 322. Limiting Groove; 323. Positioning Through Hole; 324. Guide Block; 33. Lower Silencing Pad of Square Tongue Plate: 331. Silencing Guide Groove; 332. Silencing Positioning Groove; 333. Lower Positioning Hole; 334. Lower Positioning Post; 34. Upper Silencing Pad of Square Tongue Plate: 341. Upper Silencing Positioning Groove; 342. Transmission Plate Slide Groove; 343. Upper Positioning Post; 35. Square Tongue Pulley: 351. Square Tongue Mating Tooth; 352. Torsion Spring Fixing Post; 353. Pulley Port; 354. Positioning Hole; 355. Sliding Post;

[0043] 4. Slanted tongue pick mechanism: 41. Lower silencing pad of slanted tongue pick, 42. Slanted tongue pick: 421. Lower silencing ring of pick, 422. Square limiting post, 42. Positioning cam, 424. Upper silencing ring of pick, 43. Pulsating plate: 431. Pulsating limiting groove, 432. Slanted tongue mating tooth, 433. Irregular limiting hole, 434. Transmission handle, 44. Upper silencing pad of slanted tongue pick;

[0044] 5. Slanted tongue assembly: 51. Silencing friction tongue, 52. Spring, 53. Slanted tongue, 54. Spring, 55. Limiting silencer ring, 56. Pull rod, 561. Positioning ring, 57. Slider, 571. Positioning groove, 572. Guide post;

[0045] 6. Square tongue damper; 61. Square tongue damping gear;

[0046] 7. Slanted tongue damper; 71. Slanted tongue damping gear;

[0047] 8. Lock body cover;

[0048] 9. Transmission plate; 91. Transmission groove.

[0049] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0050] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0051] 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.

[0052] In response to the aforementioned problem of noise generated by the impact or friction between the components of the lock body when closing or opening the door, this invention proposes a silent buffer lock body.

[0053] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0054] To illustrate the structure of the silent buffer lock body provided by the present invention, Figures 1 to 9 The structure of the silent buffer lock body is illustrated by way of example from different angles. Specifically, Figure 1 The disassembled state of the silent buffer lock body according to an embodiment of the present invention is shown; Figure 2 A square tongue-shaped picking structure according to an embodiment of the present invention is shown; Figure 3 The partial structure of the square tongue assembly according to an embodiment of the present invention is shown; Figure 4 A slanted tongue-and-pick structure according to an embodiment of the present invention is shown; Figure 5 The toggle switch structure according to an embodiment of the present invention is shown; Figure 6 The protruding states of the oblique and square tongues according to an embodiment of the present invention are shown; Figure 7 The retracted states of the oblique and square tongues according to an embodiment of the present invention are shown; Figure 8 The state of the muting friction tongue when the oblique tongue is retracted according to an embodiment of the present invention is shown; Figure 9 The diagram illustrates the state of the silencing friction tongue when the oblique tongue is extended according to an embodiment of the present invention.

[0055] like Figures 1 to 9 As shown in the figure, the silent buffer lock body provided by the present invention includes an outer liner plate 1, a lock body box bottom assembly 2, a square tongue assembly 3, a beveled tongue latching mechanism 4, a beveled tongue assembly 5, a square tongue damper 6, a beveled tongue damper 7, a lock body box cover 8, and a transmission plate 9; the lock body box bottom assembly 2 is welded to the box bottom 20 and the inner liner plate 21 of the lock body, and a square tongue silencing block 22 and a beveled tongue silencing block 29 are embedded in the inner liner plate 21. A friction tongue positioning post 291 is provided in the beveled tongue silencing block 29, and several studs 23, a fixing nail 24, a torsion spring 25, several limiting posts 26, a positioning plate 27, and a reversing plate 28 are fixed at corresponding positions on the bottom plate surface of the box bottom 20; the positioning plate 27 is provided with a U-shaped hole 271.

[0056] The square tongue assembly 3 includes a square tongue assembly noise reduction mechanism, the oblique tongue assembly 5 includes an oblique tongue assembly noise reduction mechanism, and the oblique tongue paddle mechanism 4 includes an oblique tongue paddle noise reduction assembly. The noise generated by the square tongue assembly during use is eliminated by the square tongue assembly noise reduction mechanism, the square tongue damper, and the square tongue noise reduction block; the noise generated by the oblique tongue assembly during use is eliminated by the oblique tongue assembly noise reduction mechanism, the oblique tongue damper, the oblique tongue noise reduction block, and the oblique tongue paddle noise reduction assembly.

[0057] The square tongue assembly 3 includes: a square tongue 31, a square tongue plate 32, a lower sound-absorbing pad 33, an upper sound-absorbing pad 34, and a square tongue pusher 35. The square tongue assembly's silent buffer mechanism includes: upper sound-absorbing pads and lower sound-absorbing pads disposed on both sides of the square tongue plate. The lower sound-absorbing pad is provided with a sound-absorbing guide groove, a sound-absorbing positioning groove, a lower positioning hole, and a lower positioning post. The upper sound-absorbing pad is provided with an upper sound-absorbing positioning groove, a transmission plate slide groove, and an upper positioning post.

[0058] Specifically, the square tongue 31 is provided with a slot 311, and the front end of the square tongue plate 32 is fixed in the slot 311. The square tongue plate 32 is provided with a sliding groove 321, a limiting groove 322, several positioning through holes 323, and a guide block 324. The lower silencing pad 33 of the square tongue plate is provided with a silencing guide groove 331, a silencing positioning groove 332, a lower positioning hole 333, and a lower positioning post 334; the upper silencing pad 34 of the square tongue plate is provided with an upper silencing positioning groove 341, a transmission plate sliding groove 342, and an upper positioning post 343. The lower positioning post 334 on the lower sound-absorbing pad 33 of the square tongue plate passes upward into the positioning through hole 323 on the square tongue plate 32, fixing the lower sound-absorbing pad 34 to the square tongue plate 32. The upper positioning post 343 on the upper sound-absorbing pad 34 of the square tongue plate passes through the positioning through hole 323 on the square tongue plate 32 and into the lower positioning hole 333 on the lower sound-absorbing pad 33, fixing the square tongue plate 32 between the lower sound-absorbing pad 33 and the upper sound-absorbing pad 34. Buffer grooves 301 are provided at both ends of the sound-absorbing guide groove 331, the sound-absorbing positioning groove 332, and the upper sound-absorbing positioning groove 341 to increase the deformation of the buffer area and achieve a better buffering effect.

[0059] exist Figure 2 and Figure 3 In the illustrated embodiment, the tail of the square tongue paddle 35 is provided with a square tongue mating tooth 351. The square tongue mating tooth 351 intermittently engages with the square tongue damping gear 61 on the square tongue damper 6, which can play a good buffering role at the end of the square tongue's extension or retraction stroke, maintaining a good operating feel and achieving a good buffering effect. The middle is provided with a positioning hole 354, which is fixed on the stud 23 of the box bottom 20. The side of the square tongue paddle 35 is provided with a paddle opening 353, and the end is provided with a sliding post 355. The sliding post 355 can slide in the sliding groove 321 on the square tongue plate 32 and the noise-absorbing guide groove 331 on the noise-absorbing pad 33 under the square tongue plate, effectively actuating the square tongue 31 while avoiding noise generation.

[0060] In this invention, the oblique tongue paddle mechanism 4 includes a lower oblique tongue paddle 41; an oblique tongue paddle 42; a paddle plate 43; and an upper oblique tongue paddle 44. The oblique tongue paddle silencing assembly includes: a lower silencing ring disposed at the lower end of the oblique tongue paddle; a lower oblique tongue paddle silencing ring and an upper oblique tongue paddle silencing ring nested outside the oblique tongue paddle; and an upper silencing ring disposed at the upper end of the oblique tongue paddle.

[0061] Specifically, in Figure 4 and Figure 5 In the embodiment shown, the lower end of the oblique tongue paddle 42 is provided with a lower muffler ring 421, and an oblique tongue paddle lower muffler pad 41 is nested on its outer side. The oblique tongue paddle lower muffler pad 41 is limited in the oblique tongue paddle hole of the box bottom 20. The oblique tongue paddle 42 is provided with a limiting cam 423 on the upper part of the muffler ring 421. A square limiting post 422 (with chamfer in the figure) is provided in the middle of the oblique tongue paddle 42. It is inserted into the irregular limiting hole 433 in the middle of the actuating piece 43, which can realize the relative movement of the actuating piece 43 and the oblique tongue paddle 42 in the radial direction. The relative movement angle range is 0° to 90°. An upper muffler ring 424 is provided on the upper part of the oblique tongue paddle 42, and an oblique tongue paddle upper muffler pad 44 is nested on its outer side. The oblique tongue paddle upper muffler pad 44 is limited in the oblique tongue paddle hole of the box cover 8. The actuating plate 43 has a side actuation limiting groove 431 at one end and a transmission handle 434 at the other end. It has a special-shaped limiting hole 433 in the middle and a slanted tongue engaging tooth 432 on the outside of the special-shaped limiting hole 433. The slanted tongue engaging tooth 432 engages with the slanted tongue damping gear 71 on the slanted tongue damper 7. The intermittent engagement between the slanted tongue engaging tooth 432 and the slanted tongue damping gear 71 on the slanted tongue damper 7 can play a good buffering role at the end of the extension or retraction stroke of the slanted tongue, which maintains a good operating feel and achieves a good buffering effect.

[0062] In this invention, the oblique tongue assembly 5 includes a friction tongue 51, a spring 52, an oblique tongue 53, a spring 54, a limiting silencing ring 55, a pull rod 56, and a slider 57. The oblique tongue assembly's silent buffer mechanism includes a silencing friction tongue and a limiting silencing ring sleeved on the pull rod. Specifically, the silencing friction tongue 51 is pivotally connected to the middle of the oblique tongue 53; the spring 52 is embedded in the oblique tongue 53 and presses against the rear end of the silencing friction tongue 51, keeping the silencing friction tongue 51 aligned with the oblique tongue 53 when it is not extended; the oblique tongue slider 57 has a positioning groove 571 in the middle and a guide post 572 at the rear; a pull rod 56 is fixed to the rear end of the oblique tongue 53, the pull rod is equipped with a spring 54 and a limiting silencing ring 55, and a positioning ring 561 is provided at the rear end of the pull rod 56, which is embedded in the positioning groove 571 of the slider 57; the limiting silencing ring 55 is engaged with the U-shaped part of the positioning plate 27. Inside the 271-shaped hole; a transmission groove 91 is provided in the middle of the transmission plate 9, which is embedded in the guide block 324 of the square tongue plate 32. The upper end of the transmission plate 9 is placed in the transmission plate groove 342 on the sound-absorbing pad 34 of the square tongue plate; the guide post 572 at the rear of the oblique tongue slider 57 slides in the actuation limit groove 431 of the actuation plate 43; after the upper end of the transmission plate 9 abuts against the transmission handle 434 of the actuation plate 43 of the actuation plate 43, the unlocking torque can be transmitted to the actuation plate 43, which drives the slider 57 to retract backward through the actuation limit groove 431, thereby causing the oblique tongue 53 to retract into the bottom 20 of the box.

[0063] The noise-absorbing components described in this invention, including the square tongue noise-absorbing block 22, the oblique tongue noise-absorbing block 29, the noise-absorbing friction tongue 51, the oblique tongue upper noise-absorbing pad 44, the oblique tongue lower noise-absorbing pad 41, the square tongue lower noise-absorbing pad 33, and the square tongue upper noise-absorbing pad 34, are all made of noise-absorbing plastic materials. Depending on actual needs, one or more noise-absorbing materials such as nylon, TPE elastic plastic, TPR elastic plastic, and ABS can be used to manufacture the above-mentioned noise-absorbing components.

[0064] like Figure 6 , Figure 7 (combination) Figures 1 to 5 As shown, during the extension (or retraction) of the square tongue 31, the sliding post 355 at the end of the square tongue lever 35 slides within the sliding groove 321 on the square tongue plate 32 and the noise-reducing guide groove 331 on the lower noise-reducing pad 33 of the square tongue plate, effectively actuating the square tongue 31 while avoiding noise generation. At the same time, the square tongue mating tooth 351 intermittently engages with the square tongue damping gear 61 on the square tongue damper 6, providing a good buffering effect at the end of the extension or retraction stroke of the square tongue, maintaining a good operating feel while achieving a good buffering effect, reducing the speed of the square tongue 31 extension (or retraction), and reducing the noise generated by the collision between the various linkage components. Furthermore, during the extension (or retraction) of the square tongue 31, the square tongue 31 slides within the square tongue noise-reducing block 22 without generating noise, and the lower noise-reducing pad 33 and the upper noise-reducing pad 34 on both sides of the square tongue plate 32 make flexible contact with the bottom of the box 20 and the lid of the box, respectively, without generating noise.

[0065] The oblique tongue 53 extends under the elastic force of the spring 54 or retracts under the action of external force. During this process, the oblique tongue 53 slides in the oblique tongue noise-absorbing block 29, and no friction noise is generated. The lower noise-absorbing pad 41 of the oblique tongue jack is limited to the oblique tongue jack hole of the bottom of the box 20, and the upper noise-absorbing pad 44 of the oblique tongue jack is limited to the oblique tongue jack hole of the cover 8. No friction noise is generated during the rotation of the oblique tongue jack. Moreover, the oblique tongue mating tooth 432 and the oblique tongue damping gear 71 on the oblique tongue damper 7 are intermittently engaged, which can play a good buffering role at the end of the oblique tongue extension or retraction stroke. This maintains a good operating feel and achieves a good buffering effect, reduces the speed of the oblique tongue 53 extension or retraction, and reduces the noise generated by the collision between the linkage components.

[0066] like Figure 8 As shown, after the upper end of the transmission plate 9 contacts the transmission handle 434 of the actuating plate 43, the unlocking torque can be transmitted to the actuating plate 43. Through the actuating limit groove 431, the slider 57 is driven to retract backward, thereby causing the oblique tongue 53 to retract into the bottom 20 of the box. When the oblique tongue 53 retracts, the spring piece 52 pressing against the rear end of the silencing friction tongue 51 pushes the silencing friction tongue 51 forward, keeping the silencing friction tongue 51 aligned with the oblique tongue 53.

[0067] like Figure 9As shown, when the latch 53 extends, the friction tongue positioning post 291, located within the latch silencing block 29, prevents the tail end of the silencing friction tongue 51 from sliding out of the latch silencing block. The front end of the silencing friction tongue 51 is raised above the surface of the latch 53. Simultaneously, the spring 52 is compressed to provide elastic preload to the silencing friction tongue 51. When the door closes, the silencing friction tongue 51 contacts the latch box on the door frame before the latch 53, buffering the impact force of closing and reducing noise generated by the collision of various linkage components. Furthermore, the silencing friction tongue 51 makes flexible contact with the latch silencing block 29 during extension and retraction, preventing noise generation.

[0068] This invention comprehensively utilizes flexible material buffering, damping buffering, and elastic buffering to significantly reduce the extension or retraction speed of the square latch 31 and the oblique latch 53, thereby reducing noise generated by the collision of various linkage components. It achieves all the noise reduction technical indicators of a silent door lock, providing a high-quality product for improving people's quality of life.

[0069] As can be seen from the above embodiments, the silent buffer lock body provided by the present invention eliminates the noise generated by the square tongue assembly during use through the silent buffer mechanism of the square tongue assembly, the square tongue damper, and the square tongue muffler; and eliminates the noise generated by the oblique tongue assembly during use through the silent buffer mechanism of the oblique tongue assembly, the oblique tongue damper, the oblique tongue muffler, and the oblique tongue pusher muffler assembly; thereby solving the problem of noise generated by the impact or friction between the various components of the lock body when closing or opening the door.

[0070] The silent buffer lock body according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the silent buffer lock body proposed by the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A silent buffer lock body comprising: The lock body outer lining plate, the lock body box bottom assembly, the latch bolt pushing mechanism, the latch bolt assembly, the lock body box cover, the lock body box bottom assembly comprises a box bottom and a lock body inner lining plate arranged on the box bottom; characterized in that, further comprising: a latch bolt damper, wherein, The latch bolt silencing block is embedded on the lock body inner lining plate, the latch bolt assembly comprises a latch bolt assembly mute buffer mechanism and a pull rod, the latch bolt pushing mechanism comprises a latch bolt pushing silencing assembly, a pushing piece and a latch bolt pusher, wherein, The latch bolt assembly mute buffer mechanism comprises a limiting silencing ring sleeved on the pull rod, a positioning plate is arranged on the bottom plate surface of the box bottom at a corresponding position, the limiting silencing ring is clamped on the positioning plate, the latch bolt pushing silencing assembly is used to realize the relative movement of the pushing piece and the latch bolt pusher in the radial direction, a latch bolt damping gear is arranged on the latch bolt damper, and a latch bolt matching tooth is arranged on the outside of the middle end of the pushing piece; wherein, the latch bolt matching tooth is matched with the latch bolt damping gear; The latch bolt assembly mute buffer mechanism, the latch bolt damper, the latch bolt silencing block and the latch bolt pushing silencing assembly are used to eliminate the noise generated by the latch bolt assembly during use.

2. The mute buffer lock body of claim 1, further comprising a square tongue assembly, the square tongue assembly comprising: a square tongue, a square tongue plate, a square tongue pusher, a square tongue plate upper silencing pad arranged on both sides of the square tongue plate, and a square tongue plate lower silencing pad, wherein, A transmission plate sliding groove is arranged on the square tongue plate upper silencing pad, a clamping groove is arranged on the square tongue, the front end of the square tongue plate is fixed in the clamping groove, a sliding groove, a limiting groove, at least two above positioning through holes and a guide block are arranged on the square tongue plate; A sliding column is arranged at the end of the square tongue pusher, and the sliding column slides in the sliding groove.

3. The mute buffer lock body of claim 2, wherein the latch bolt assembly further comprises a spring piece, a latch bolt, and a sliding block sleeved on the pull rod, wherein a positioning groove is arranged in the middle of the sliding block, a guide column is arranged at the rear of the sliding block, a positioning ring is arranged at the rear end of the pull rod, and the positioning ring is embedded into the positioning groove; the latch bolt assembly mute buffer mechanism further comprises a silencing friction tongue; the silencing friction tongue is pivoted in the middle of the latch bolt, the spring piece is embedded into the latch bolt and presses against the rear end of the silencing friction tongue.

4. The mute buffer lock body of claim 3, wherein a U-shaped hole is arranged on the positioning plate, and the limiting silencing ring is clamped in the U-shaped hole.

5. The mute buffer lock body of claim 4, wherein a limiting cam is arranged on the upper part of the latch bolt pusher, and a square limiting column is arranged on the middle part of the latch bolt pusher, One end of the pushing piece is provided with a pushing limiting groove, the other end is provided with a transmission handle, and the middle end is provided with a special-shaped limiting hole; The latch bolt pushing silencing assembly comprises: a lower silencing embedded ring arranged at the lower end of the latch bolt pusher, a latch bolt pusher lower silencing pad and a latch bolt pusher upper silencing pad nested on the outside of the latch bolt pusher, and an upper silencing embedded ring arranged at the upper end of the latch bolt pusher. ​ ​ ​ ​ The oblique tongue prying peach upper silencing pad and the oblique tongue prying peach lower silencing pad are limited in the oblique tongue prying peach hole of the box bottom, the square limiting column is inserted into the special-shaped limiting hole, so as to realize the relative movement of the prying piece and the oblique tongue prying peach in the radial direction; wherein, The angle range of the relative movement of the prying piece and the oblique tongue prying peach in the radial direction is 0 °~90 °.

6. The mute buffer lock body of claim 5, wherein, The oblique tongue matching tooth is arranged outside the special-shaped limiting hole; wherein, The oblique tongue matching tooth is intermittently matched with the oblique tongue damping gear.

7. The mute buffer lock body of claim 3, wherein, A friction tongue positioning column is arranged in the oblique tongue silencing block, and the friction tongue positioning column is used to prevent the tail end of the silencing friction tongue from sliding out of the oblique tongue silencing block.

8. The mute buffer lock body of claim 6, further comprising a transmission piece, a transmission sliding groove is arranged in the middle part of the transmission piece, wherein, A guide block on the square tongue plate is embedded in the transmission sliding groove, and the upper end of the transmission piece is arranged in the transmission plate sliding groove on the upper silencing pad of the square tongue plate; The guide column of the oblique tongue assembly is arranged in the prying limiting groove of the prying piece and slides, and the upper end of the transmission piece is in contact with the transmission handle of the prying piece, so that the unlocking torque is transmitted to the prying piece.

9. The mute buffer lock body of claim 8, wherein, The oblique tongue silencing block, the silencing friction tongue, the oblique tongue prying peach upper silencing pad, the oblique tongue prying peach lower silencing pad, and the square tongue plate upper silencing pad are all made of silencing plastic materials.

10. The mute buffer lock body of claim 9, wherein, The silencing plastic materials include nylon, TPE elastic plastic, TPR elastic plastic, ABS, or any two or more materials. ​

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