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 square tongue assembly, a lock body box cover, the lock body box bottom assembly comprises a box bottom and a lock body inner lining plate, and further comprises a square tongue damper, wherein a square tongue noise elimination block is embedded on the lock body inner lining plate, the square tongue assembly comprises a square tongue assembly mute buffer mechanism, and the square tongue assembly mute buffer mechanism, the square tongue damper and the square tongue noise elimination block eliminate the noise generated by the square tongue assembly during use. By using the application, the problem that the lock body will generate noise due to the impact or friction between the components when closing or opening the door can be solved.

Description

[0001] The present application is a divisional application of the Chinese patent application No. 201710587936.2, filed on July 19, 2017, with the title of "Silent Buffer Lock Body". TECHNICAL FIELD

[0002] The present application relates to the technical field of door locks for buildings and homes, in particular to a lock body, especially a silent buffer lock body with less noise. BACKGROUND

[0003] At present, the door locks used in the field of homes are usually made of metal materials, and when opening and closing the door, noise will be generated due to the impact or friction between the parts. In order to reduce the noise, the common solution is to start from the latch that is most prone to impact, directly slow down the impact of the latch or improve the parts around the contact, which has a certain positive effect in reducing the noise generated when closing the door. However, the noise generated when closing the door is not only the noise generated when the latch extends and retracts, but also a large part of the noise generated by the friction between the internal parts of the lock body. For the double-latch lock body, the extension and retraction of the square tongue will also generate a part of the noise. In order to solve the above problems, the present application provides a silent buffer lock body. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a silent buffer lock body to solve the problem that the impact or friction between the parts of the lock body when closing or opening the door will generate noise.

[0005] The present application provides a silent buffer lock body, comprising: a lock body outer lining plate, a lock body box bottom assembly, a square tongue assembly, a lock body box cover, the lock body box bottom assembly comprising a box bottom and a lock body inner lining plate arranged on the box bottom; further comprising: a square tongue damper, wherein,

[0006] A square tongue noise reduction block is embedded on the lock body inner lining plate, and the square tongue assembly comprises a square tongue assembly silent buffer mechanism, wherein,

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

[0008] In addition, preferably, the square tongue assembly further comprises: a square tongue, a square tongue plate, a square tongue pusher, wherein 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;

[0009] The mute buffer mechanism of the square tongue assembly comprises: a square tongue plate upper mute pad arranged on both sides of the square tongue plate, and a square tongue plate lower mute pad, wherein a mute guide groove, a mute positioning groove, a lower positioning hole and a lower positioning column are arranged on the square tongue plate lower mute pad, and an upper mute positioning groove, a transmission plate sliding groove and an upper positioning column are arranged on the square tongue plate upper mute pad;

[0010] The lower positioning column penetrates into the positioning through hole to fix the square tongue plate lower mute pad and the square tongue plate, and the upper positioning column penetrates through the positioning through hole and the lower positioning hole in sequence to fix the square tongue plate between the square tongue plate lower mute pad and the square tongue plate upper mute pad.

[0011] In addition, preferably, a square tongue matching tooth is arranged at the tail of the square tongue peach, and a square tongue damping gear is arranged on the square tongue damper, and the square tongue matching tooth intermittently matches with the square tongue damping gear.

[0012] In addition, preferably, a sliding column is arranged at the end of the square tongue peach, and the sliding column slides in the sliding groove and the mute guide groove.

[0013] The mute guide groove, the mute positioning groove and the upper mute positioning groove are provided with buffer grooves at both ends.

[0014] In addition, preferably, the square tongue assembly further comprises a latch tongue assembly, the latch tongue assembly comprising: a spring sheet, a latch tongue, a pull rod fixed to the rear end of the latch tongue, a sliding block sleeved on the pull rod, a mute friction tongue, a limiting mute ring sleeved on the pull rod; wherein,

[0015] A positioning groove is arranged in the middle of the sliding block, a guide column is arranged at the rear part, a positioning ring is arranged at the rear end of the pull rod, and the positioning ring is embedded into the positioning groove;

[0016] The mute friction tongue is pivoted to the middle of the latch tongue, and the spring sheet is embedded into the latch tongue and abuts against the rear end of the mute friction tongue.

[0017] In addition, preferably, the latch tongue assembly further comprises a latch tongue peach mechanism, the latch tongue peach mechanism comprising: a latch tongue peach, a driving sheet, a lower mute embedded ring arranged at the lower end of the latch tongue peach, a latch tongue peach lower mute pad and a latch tongue peach upper mute pad nested on the outer side of the latch tongue peach, and an upper mute embedded ring arranged at the upper end of the latch tongue peach; wherein a limiting cam is arranged at the upper part of the latch tongue peach, and a square limiting column is arranged at the middle part of the latch tongue peach,

[0018] One end of the driving sheet is provided with a driving limiting groove, the other end is provided with a transmission handle, and the middle end is provided with a special-shaped limiting hole.

[0019] 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, and the square limiting column is inserted into the special-shaped limiting hole to realize the relative movement of the prying piece and the oblique tongue prying peach in the radial direction.

[0020] In addition, preferably, the angle range of the relative movement of the prying piece and the oblique tongue prying peach in the radial direction is 0°-90°.

[0021] In addition, preferably, the angle range of the relative movement of the prying piece and the oblique tongue prying peach in the radial direction is 0°-90°.

[0022] The guide block on the square tongue plate is embedded in the transmission sliding groove, and the upper end of the transmission piece is placed in the transmission plate sliding groove on the square tongue plate upper silencing pad;

[0023] The guide column of the oblique tongue assembly is placed 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 to transmit the unlocking torque to the prying piece.

[0024] In addition, preferably, the square tongue silencing block, 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, the square tongue plate lower silencing pad and the square tongue plate upper silencing pad are all made of silencing plastic materials.

[0025] In addition, preferably, the silencing plastic materials include nylon, TPE elastic plastic, TPR elastic plastic, ABS, or any two or more materials.

[0026] From the above technical solutions, the mute buffer lock body provided by the application eliminates the noise generated by the square tongue assembly during use through the square tongue assembly mute buffer mechanism, the square tongue damper and the square tongue silencing block; thereby solving the problem that the noise is generated by the impact or friction between the components when the lock body is closed or opened.

[0027] To achieve the above and related purposes, one or more aspects of the application include the features to be described in detail below. The following description and drawings in detail explain certain exemplary aspects of the application. However, these aspects indicate only some of the various ways in which the principles of the application can be used. In addition, the application is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF DRAWINGS

[0028] Other objects and results of the application will be more apparent and easy to understand by referring to the following description in conjunction with the drawings, and with a more comprehensive understanding of the application. In the drawings:

[0029] Figure 1 is an exploded view of the mute buffer lock body according to the embodiment of the application;

[0030] Figure 2 Structure diagram of square tongue pushing piece according to an embodiment of the present application;

[0031] Figure 3 Structure diagram of square tongue assembly part according to an embodiment of the present application;

[0032] Figure 4 Structure diagram of oblique tongue pushing piece according to an embodiment of the present application;

[0033] Figure 5 Structure diagram of pushing piece according to an embodiment of the present application;

[0034] Figure 6 Structure diagram of oblique tongue and square tongue in extended state according to an embodiment of the present application;

[0035] Figure 7 Structure diagram of oblique tongue and square tongue in retracted state according to an embodiment of the present application;

[0036] Figure 8 Structure diagram of sound-damping friction tongue in retracted state of oblique tongue according to an embodiment of the present application;

[0037] Figure 9 Structure diagram of sound-damping friction tongue in extended state of oblique tongue according to an embodiment of the present application.

[0038] The reference signs in the drawings include: 1, lock body outer lining plate;

[0039] 2, box bottom assembly: 20, box bottom, 21, lock body inner lining plate, 22, square tongue sound-damping block, 23, stud, 24, fixing nail, 25, torsion spring, 26, limiting column, 27, positioning plate, 271, U-shaped hole, 28, reversing plate, 29, oblique tongue sound-damping block, 291, friction tongue positioning column;

[0040] 3, square tongue assembly: 301, buffer groove, 31, square tongue, 32, square tongue plate: 321, sliding groove, 322, limiting groove, 323, positioning via, 324, guide block, 33, square tongue plate lower sound-damping pad: 331, sound-damping guide groove, 332, sound-damping positioning groove, 333, lower positioning hole, 334, lower positioning column, 34, square tongue plate upper sound-damping pad: 341, upper sound-damping positioning groove, 342, transmission plate sliding groove, 343, upper positioning column; 35, square tongue pushing piece: 351, square tongue matching tooth, 352, torsion spring fixing column, 353, pushing opening, 354, positioning hole, 355, sliding column;

[0041] 4, tongue prongs mechanism: 41, tongue prongs lower silencer pad, 42, tongue prongs: 421, prong lower silencer ring, 422, square limiting column, 42, positioning cam, 424, prong upper silencer ring, 43, prong: 431, prong limiting slot, 432, tongue matching tooth, 433, special-shaped limiting hole, 434, transmission handle, 44, tongue prongs upper silencer pad;

[0042] 5, tongue assembly: 51, silencing friction tongue, 52, spring piece, 53, tongue, 54, spring, 55, limiting silencer ring, 56, pull rod, 561, positioning ring, 57, sliding block, 571, positioning slot, 572, guide column;

[0043] 6, square tongue damper, 61, square tongue damping gear;

[0044] 7, tongue damper, 71, tongue damping gear;

[0045] 8, lock body box cover;

[0046] 9, transmission piece, 91, transmission sliding slot.

[0047] The same reference numbers in all the figures indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0048] In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It is apparent, however, that the embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0049] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In view of the foregoing problem that the impact or friction between the components of the lock body when closing or opening the door will generate noise, the present application proposes a mute buffer lock body.

[0051] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0052] In order to illustrate the structure of the mute buffer lock body provided by the present application, Figures 1 to 9 The structure of the mute buffer lock body is exemplarily indicated from different angles respectively. Specifically, Figure 1 The exploded state of the mute buffer lock body according to the embodiment of the present application is shown; Figure 2 The square tongue pushing structure according to the embodiment of the present application is shown; Figure 3 The square tongue assembly partial structure according to the embodiment of the present application is shown; Figure 4 The latch tongue pushing structure according to the embodiment of the present application is shown; Figure 5 The pushing piece structure according to the embodiment of the present application is shown; Figure 6 The latch tongue and square tongue extension state according to the embodiment of the present application is shown; Figure 7 The latch tongue and square tongue retraction state according to the embodiment of the present application is shown; Figure 8 The mute friction tongue state when the latch tongue is retracted according to the embodiment of the present application is shown; Figure 9 The mute friction tongue state when the latch tongue is extended according to the embodiment of the present application is shown.

[0053] As Figures 1 to 9 As shown in the drawings, the mute buffer lock body provided by the present application comprises a lock body outer lining plate 1, a lock body box bottom assembly 2, a square tongue assembly 3, a latch tongue pushing mechanism 4, a latch tongue assembly 5, a square tongue damper 6, a latch tongue damper 7, a lock body box cover 8, and a transmission piece 9. The lock body box bottom assembly 2 is welded by a box bottom 20 and a lock body inner lining plate 21. The square tongue mute block 22 and the latch tongue mute block 29 are embedded on the lock body inner lining plate 21. The friction tongue positioning column 291 is arranged in the latch tongue mute block 29. A plurality of stud bolts 23, a fixed nail 24, a torsional spring 25, a plurality of limiting columns 26, a positioning plate 27, and a reversing plate 28 are fixed on the bottom plate surface of the box bottom 20 at corresponding positions. The positioning plate 27 is provided with a U-shaped hole 271.

[0054] The square tongue assembly 3 comprises a square tongue assembly mute buffer mechanism. The latch tongue assembly 5 comprises a latch tongue assembly mute buffer mechanism. The latch tongue pushing mechanism 4 comprises a latch tongue pushing mute assembly. The noise generated by the square tongue assembly during use is eliminated by the square tongue assembly mute buffer mechanism, the square tongue damper, and the square tongue mute block. The noise generated by the latch tongue assembly during use is eliminated by the latch tongue assembly mute buffer mechanism, the latch tongue damper, the latch tongue mute block, and the latch tongue pushing mute assembly.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The sound-damping components: square tongue sound-damping block 22, oblique tongue sound-damping block 29, sound-damping friction tongue 51, oblique tongue knob upper sound-damping pad 44, oblique tongue knob lower sound-damping pad 41, square tongue plate lower sound-damping pad 33, square tongue plate upper sound-damping pad 34 are made of sound-damping plastic material, and according to actual needs, one or more of sound-damping materials such as nylon, TPE elastic plastic, TPR elastic plastic, ABS, etc. are used to manufacture the above sound-damping components.

[0062] As shown in Figure 6 , Figure 7 (Combination Figures 1 to 5 ) shown, in the process of extending (or retracting) the square tongue 31, the sliding column 355 at the end of the square tongue knob 35 slides in the sliding groove 321 on the square tongue plate 32 and the sound-damping guide groove 331 on the square tongue plate lower sound-damping pad 33, avoiding noise generation while effectively driving the square tongue 31; at the same time, the square tongue matching teeth 351 intermittently cooperate with the square tongue damping gear 61 on the square tongue damper 6, playing a good buffering effect at the end of the square tongue extension or retraction stroke, maintaining a good operation feeling and achieving a good buffering effect, reducing the speed of the square tongue 31 extension (or retraction) and reducing the noise generated by the mutual collision of the components; in addition, in the process of extending (or retracting) the square tongue 31, the square tongue 31 slides in the square tongue sound-damping block 22 without generating noise, and the square tongue plate lower sound-damping pad 33 and the square tongue plate upper sound-damping pad 34 on both sides of the square tongue plate 32 are in flexible contact with the box bottom 20 and the box cover 8 respectively, also without generating noise.

[0063] The oblique tongue 53 extends under the elastic force of the spring 54 or retracts under external force, and in this process, the oblique tongue 53 slides in the oblique tongue sound-damping block 29 without generating friction noise; the oblique tongue knob lower sound-damping pad 41 is limited in the oblique tongue knob hole of the box bottom 20, and the oblique tongue knob upper sound-damping pad 44 is limited in the oblique tongue knob hole of the box cover 8, and the oblique tongue knob also does not emit friction noise during rotation; and the oblique tongue matching teeth 432 intermittently cooperate with the oblique tongue damping gear 71 on the oblique tongue damper 7, playing a good buffering effect at the end of the oblique tongue extension or retraction stroke, maintaining a good operation feeling and achieving a good buffering effect, reducing the speed of the oblique tongue 53 extension or retraction and reducing the noise generated by the mutual collision of the components.

[0064] As shown in Figure 8 , after the upper end of the transmission sheet 9 comes into contact with the transmission handle 434 of the driving sheet 43, the unlocking torque can be transmitted to the driving sheet 43, the sliding block 57 is driven to retract backward through the driving limiting groove 431, so that the oblique tongue 53 is retracted into the box bottom 20. When the oblique tongue 53 is retracted, the spring 52 abutting against the rear end of the sound-damping friction tongue 51 moves the sound-damping friction tongue 51 forward, so that the sound-damping friction tongue 51 remains aligned with the oblique tongue 53.

[0065] As shown in Figure 9As shown, when the latch 53 is extended, the friction latch positioning column 291 provided in the latch silencing block 29 prevents the tail end of the silencing friction latch 51 from sliding out of the latch silencing block, the front end of the silencing friction latch 51 is lifted above the surface of the latch 53, and at the same time, the spring 52 is compressed to provide the silencing friction latch 51 with an elastic pre-pressure. When the door is closed thereafter, the silencing friction latch 51 will contact the catch box of the door frame before the latch 53, thereby buffering the impact force of the closing door and reducing the noise generated by the mutual collision of the linkage components; at the same time, the silencing friction latch 51 is in flexible contact with the latch silencing block 29 during the extension and retraction process, and no noise is generated.

[0066] The present application comprehensively uses flexible material buffering, damping buffering and elastic buffering to comprehensively reduce the speed of the extension or retraction of the square tongue 31 and the latch 53, and reduce the noise generated by the mutual collision of the linkage components. The various noise reduction technical indicators of the silent door lock are achieved, and a high-quality product is provided for improving the quality of people's life.

[0067] As can be seen from the above embodiments, the silent buffering lock body provided by the present application eliminates the noise generated by the square tongue assembly during use through the square tongue assembly silent buffering mechanism, the square tongue damper and the square tongue silencing block; and eliminates the noise generated by the latch assembly during use through the latch assembly silent buffering mechanism, the latch damper, the latch silencing block and the latch pusher silencing assembly; thereby solving the problem of noise generated by the mutual collision or friction between the components of the lock body when the door is closed or opened.

[0068] The silent buffering lock body according to the present application is described above with reference to the accompanying drawings in an exemplary manner. However, those skilled in the art should understand that various improvements can be made to the above-mentioned silent buffering lock body according to the present application without departing from the content of the present application. Therefore, the protection scope of the present application should be determined by the content 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 square tongue 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 square tongue damper, wherein, The square tongue silencing block is embedded on the lock body inner lining plate, the square tongue assembly comprises a square tongue assembly mute buffer mechanism, a square tongue, a square tongue plate, a square tongue peach, a sliding groove and two or more positioning through holes are arranged on the square tongue plate, a square tongue matching tooth is arranged at the tail of the square tongue peach, a square tongue damping gear is arranged on the square tongue damper, the square tongue matching tooth is matched with the square tongue damping gear, a sliding column is arranged at the end of the square tongue peach, the sliding column slides in the sliding groove and the silencing guide groove of the square tongue assembly mute buffer mechanism; the square tongue assembly mute buffer mechanism comprises: a square tongue plate upper silencing pad arranged on both sides of the square tongue plate, a square tongue plate lower silencing pad, wherein the silencing guide groove is arranged on the square tongue plate lower silencing pad, a lower positioning hole and a lower positioning column are arranged on the square tongue plate lower silencing pad, and an upper positioning column is arranged on the square tongue plate upper silencing pad; the lower positioning column penetrates into the positioning through hole upward to fix the square tongue plate lower silencing pad and the square tongue plate, and the upper positioning column penetrates through the positioning through hole and the lower positioning hole in sequence to fix the square tongue plate between the square tongue plate lower silencing pad and the square tongue plate upper silencing pad; wherein, The noise generated by the square tongue assembly during use is eliminated through the square tongue assembly mute buffer mechanism, the square tongue damper and the square tongue silencing block.

2. The mute buffer lock body of claim 1, wherein, A clamping groove is arranged on the square tongue, the front end of the square tongue plate is fixed in the clamping groove, a limiting groove and a guide block are arranged on the square tongue plate, A silencing positioning groove is arranged on the square tongue plate lower silencing pad, and an upper silencing positioning groove and a transmission plate sliding groove are arranged on the square tongue plate upper silencing pad.

3. The mute buffer lock body of claim 2, wherein, The square tongue matching tooth and the square tongue damping gear are intermittently matched.

4. The mute buffer lock body of claim 3, wherein, The silencing guide groove, the silencing positioning groove and the upper silencing positioning groove are all provided with buffer grooves at both ends.

5. The mute buffer lock body of claim 4, further comprising a bevel tongue assembly, the bevel tongue assembly comprises: a spring piece, a bevel tongue, a pull rod fixed with the rear end of the bevel tongue, a sliding block sleeved on the pull rod, a silencing friction tongue, and a limiting silencing ring 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 part, a positioning ring is arranged at the rear end of the pull rod, and the positioning ring is embedded into the positioning groove; The silencing friction tongue is pivoted to the middle of the bevel tongue, the spring piece is embedded into the bevel tongue and presses against the rear end of the silencing friction tongue.

6. The mute buffer lock body of claim 5, wherein, ​ Further comprising a latch tongue pushing mechanism, the latch tongue pushing mechanism comprising: a latch tongue pushing piece, a pushing piece, a lower silencing ring arranged at the lower end of the latch tongue pushing piece, a lower silencing pad nested outside the latch tongue pushing piece and an upper silencing pad of the latch tongue pushing piece, an upper silencing ring arranged at the upper end of the latch tongue pushing piece; wherein, A limiting cam is arranged at the upper part of the latch tongue pushing piece, a square limiting column is arranged at the middle part of the latch tongue pushing piece, one end of the pushing piece is provided with a pushing limiting slot, the other end is provided with a transmission handle, and the middle end is provided with a special limiting hole; The upper silencing pad of the latch tongue pushing piece and the lower silencing pad of the latch tongue pushing piece are limited in the latch tongue pushing hole of the box bottom, the square limiting column is inserted into the special limiting hole, so as to realize the relative movement of the pushing piece and the latch tongue pushing piece in the radial direction.

7. The mute buffer lock body of claim 6, wherein, The angle range of the relative movement of the pushing piece and the latch tongue pushing piece in the radial direction is 0 ° ~ 90 °.

8. The mute buffer lock body of claim 7, wherein, Further comprising a transmission piece, a transmission sliding groove is arranged at the middle part of the transmission piece, wherein, The 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 latch tongue assembly is arranged in the pushing limiting slot of the pushing piece and slides, and the upper end of the transmission piece is in contact with the transmission handle of the pushing piece, so as to transmit the unlocking torque to the pushing piece.

9. The mute buffer lock body of claim 8, wherein, The square tongue silencing block, the silencing friction tongue, the upper silencing pad of the latch tongue pushing piece, the lower silencing pad of the latch tongue pushing piece, the lower silencing pad of the square tongue plate and the upper silencing pad of the square tongue plate are all made of silencing plastic material.

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

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