Mute lock body

Abstract

The utility model discloses a mute lock body which comprises a lock shell, a spring bolt arranged at one end of the lock shell, a linkage arm arranged on the spring bolt, a shifting wheel rotationally arranged on the lock shell and matched with the linkage arm, and a reset piece arranged in the lock shell and used for resetting the spring bolt. One end of the lock shell is provided with a sliding hole used for the spring bolt to retract into or slide out of an inner cavity of the lock shell, and when the shifting wheel is rotated, the shifting wheel drives the linkage arm to enable the spring bolt to retract into the inner cavity of the lock shell. The anti-theft lock further comprises a buffering piece, the buffering piece is arranged in the lock shell, and when the shifting wheel drives the linkage arm to enable the spring bolt to completely retract into the inner cavity of the lock shell, the inner end of the linkage arm abuts against the buffering piece. The buffering piece is arranged in the lock shell, the linkage arm is buffered when the spring bolt moves inwards, the linkage arm is prevented from impacting the lock shell, the mute effect is good, and the service life of the lock body can be prolonged.

Description

Technical Field

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

[0002] At present, the lock bodies on the market generally include a lock shell, a lock tongue, a reset member and a rotatable dial wheel are arranged in the lock shell. The lock tongue can extend or retract into the lock shell. A lock frame is slidably arranged in the lock shell. The lock tongue and the lock frame are integrally arranged. The reset member abuts against the lock frame to reset the lock frame. A long groove is arranged on the lock frame along its sliding direction. A dial piece extends from the dial wheel into the long groove. A contact surface that can cooperate with the dial piece is arranged on the inner wall at the rear end of the long groove. The dial piece abuts against the contact surface in the long groove. When the dial wheel rotates, the lock frame can drive the lock tongue to slide backward into the lock shell.

[0003] The lock frame of this lock body is in a "U" - shaped structure, and the lock tongue and the lock frame move synchronously. During actual use, when the lock tongue and the lock frame move towards the inside of the lock shell, the lock frame usually impacts the lock shell, thus generating noise, and frequent impacts also affect the service life of the lock body. Content of the Utility Model

[0004] The purpose of the utility model is to provide a silent lock body. A buffer member is arranged inside the lock shell of the utility model to buffer the linkage arm when the lock tongue moves inward, avoid it from impacting the lock shell, having a good silent effect and being able to improve the service life of the lock body.

[0005] To achieve the above - mentioned purpose, the utility model provides the following technical solution: A silent lock body includes a lock shell, a lock tongue arranged at one end of the lock shell, a linkage arm arranged on the lock tongue, a dial wheel rotatably arranged on the lock shell and cooperating with the linkage arm, and a reset member arranged in the lock shell for resetting the lock tongue. A sliding hole for the lock tongue to retract into or slide out of the inner cavity of the lock shell is arranged at one end of the lock shell. When the dial wheel rotates, the dial wheel drives the linkage arm to cause the lock tongue to retract into the inner cavity of the lock shell. It further includes a buffer member, the buffer member is arranged in the lock shell, and when the dial wheel drives the linkage arm to cause the lock tongue to completely retract into the inner cavity of the lock shell, the inner end of the linkage arm abuts against the buffer member.

[0006] By adopting the above - mentioned technical solution, by arranging a buffer member inside the lock shell, it buffers and limits the linkage arm when the lock tongue moves inward, avoids it from directly impacting the lock shell, having the advantages of good silent effect and being able to improve the service life of the lock body.

[0007] The utility model is further arranged such that the buffer member is made of an elastic material.

[0008] By adopting the above - mentioned technical solution, the buffer member can effectively absorb the impact generated by the linkage arm, avoid generating large vibrations and noises. For example, when made of silicone material, it has good buffer performance and can also meet the requirements of light weight and durability.

[0009] The utility model is further configured such that the buffer is clamped between the inner end of the lock shell and the thumbwheel, and the left and right sides of the buffer are respectively against the left and right sides of the inner cavity of the lock shell, and the front and rear sides of the buffer are respectively against the front and rear sides of the inner cavity of the lock shell.

[0010] By adopting the above technical solution, the buffer component can be installed by limiting the lock shell and the dial wheel, and the installation operation is very convenient.

[0011] The utility model is further configured that an arc groove is provided on one side of the buffer component close to the thumbwheel, and the arc groove is matched with the outer circumferential surface of the thumbwheel.

[0012] By adopting the above technical solution, the buffer component is fitted with the outer cylindrical surface of the thumbwheel part by setting an arc groove, which improves the stability of the buffer component installation and increases the contact area with the thumbwheel, which can effectively reduce the vibration caused by the friction of metal parts and further improve the silent effect of the lock body.

[0013] The utility model is further configured such that a limiting step is respectively provided at positions corresponding to the front and rear ends of the outer circumferential surface of the dial wheel, a mounting hole coaxial with the dial wheel is respectively provided on the front and rear sides of the lock shell, a limiting flange is provided on the inner circumferential surface of the mounting hole, the two limiting flanges respectively abut against the corresponding limiting steps, and a clearance groove for the corresponding limiting flange to be embedded is respectively provided on the front and rear sides of the buffer component.

[0014] By adopting the above technical solution, the dial wheel can be axially limited and installed, so that its function of being rotatably installed on the lock housing can be realized. At the same time, a clearance groove is provided on the buffer component to avoid interference with the limiting flange during installation.

[0015] The utility model is further configured such that the inner circular surface of the limit flange is provided with an arc-shaped travel limit groove, and the thumbwheel is provided with a travel limit protrusion movably arranged in the travel limit groove, and when the travel limit protrusion abuts against the end of the travel limit groove, the thumbwheel is constrained to rotate.

[0016] By adopting the above technical solution, the rotation angle of the thumbwheel can be limited, so as to avoid the handle driving the thumbwheel to rotate excessively and causing the linkage arm and the lock housing to be squeezed and deformed.

[0017] The utility model is further configured that the buffer member is provided with a plurality of hollow grooves.

[0018] By adopting the above technical solution, not only the weight of the buffer component can be reduced, but also the amount of raw materials used in the buffer component can be reduced, thereby reducing costs.

[0019] The present utility model is further configured such that a long hole is provided on the linkage arm, one end of the long hole away from the locking tongue serves as an abutting portion, and a driving protrusion that extends into the long hole and cooperates with the abutting portion is provided on the outer circumferential surface of the dial wheel.

[0020] By adopting the above technical solution, when the dial wheel is rotated, the driving protrusion on the dial wheel acts on the abutting portion on the linkage arm, driving the linkage arm to move, and further driving the locking tongue to retract into the lock housing to achieve unlocking.

[0021] The present utility model is further configured such that a limiting bend extending outward is provided at one end of the linkage arm corresponding to the abutting portion, an outer hole for the limiting bend to extend into and move is provided on the lock housing, and after the locking tongue drives the linkage arm to move outward under the drive of the reset member, the limiting bend abuts against the end of the outer hole to form a limit.

[0022] By adopting the above technical solution, when the locking tongue extends out of the lock housing and reaches the limit position of locking, the linkage arm can be limited to prevent the locking tongue from completely disengaging from the lock housing.

[0023] The present utility model is further configured such that a positioning hole is further provided on the linkage arm, a positioning block that fits with the positioning hole is provided on the side of the locking tongue, and a protective sleeve is further sleeved on the outer periphery of the locking tongue, and the protective sleeve wraps the positioning block and the positioning hole inside.

[0024] By adopting the above technical solution, the detachable structure of the linkage arm and the locking tongue is not only convenient for pre-processing and assembly, but also beneficial for later maintenance and replacement. At the same time, sleeving a protective sleeve on the outer periphery of the locking tongue can not only protect the locking tongue, but also fix the connection part between the linkage arm and the locking tongue to ensure the reliability of the connection structure between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of the whole of the present utility model;

[0026] Figure 2 is a schematic internal structure view of the whole of the present utility model;

[0027] Figure 3 is a schematic first-view structure view of the buffer member of the present utility model;

[0028] Figure 4 is a schematic second-view structure view of the buffer member of the present utility model;

[0029] Figure 5 is a schematic assembly structure view of the locking tongue, the linkage arm and the protective sleeve of the present utility model;

[0030] Figure 6 is Figure 5 an exploded view of the structure.

[0031] In the figure: 1, lock housing; 2, lock tongue; 3, linkage arm; 4, dial; 5, reset member; 6, sliding hole; 7, buffer member; 8, arc groove; 9, limit step; 10, mounting hole; 11, limit flange; 12, relief groove; 13, stroke limit groove; 14, stroke limit protrusion; 15, hollow groove; 16, long hole; 17, abutting portion; 18, driving protrusion; 19, limit bend; 20, outer hole; 21, positioning hole; 22, positioning block; 23, protective sleeve. Detailed implementation manner

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment: As shown in the attached Figures 1 to 6 A silent lock body, including a lock housing 1, a lock tongue 2 provided at one end of the lock housing 1, linkage arms 3 provided on the left and right sides of the lock tongue 2, a dial 4 rotatably provided on the lock housing 1 and cooperating with the linkage arms 3, and a reset member 5 provided in the lock housing 1 for resetting the lock tongue 2 (the reset member 5 can be a spring, one end of the spring abuts against the inner support plate of the lock housing 1, and the other end abuts against the lock tongue 2). A sliding hole 6 for the lock tongue 2 to retract into or slide out of the inner cavity of the lock housing 1 is provided at one end of the lock housing 1. When the dial 4 is rotated, the dial 4 drives the linkage arms 3 to cause the lock tongue 2 to retract into the inner cavity of the lock housing 1. The lock body further includes a buffer member 7 provided in the lock housing 1, and when the dial 4 drives the linkage arms 3 to cause the lock tongue 2 to completely retract into the inner cavity of the lock housing 1, the inner end of the linkage arm 3 abuts against the buffer member 7. By providing the buffer member 7 inside the lock housing 1, it buffers and limits the linkage arms 3 when the lock tongue 2 moves inward, avoiding direct impact on the lock housing 1, having the advantages of good silent effect and improving the service life of the lock body.

[0034] Among them, the buffer member 7 is made of an elastic material. This enables the buffer member 7 to effectively absorb the impact generated by the linkage arms 3, avoiding large vibrations and noises. In this embodiment, the buffer member 7 is made of silica gel material, which has good buffer performance and can also meet the requirements of light weight and durability.

[0035] As shown in the attached Figure 2As shown, the buffer member 7 is clamped between the inner end of the lock housing 1 and the dial wheel 4, and the left and right sides of the buffer member 7 are respectively abutted against the left and right sides of the inner cavity of the lock housing 1, and the front and rear sides of the buffer member 7 are respectively abutted against the front and rear sides of the inner cavity of the lock housing 1. The buffer member 7 can be installed by the limitation of the lock housing 1 and the dial wheel 4, and the installation operation is very convenient.

[0036] As shown in the appendix Figure 2 and the appendix Figure 3 As shown, an arc-shaped groove 8 is provided on one side of the buffer member 7 close to the dial wheel 4, and the arc-shaped groove 8 is adapted to the outer circular surface of the dial wheel 4. The buffer member 7 is attached to a part of the outer circular surface of the dial wheel 4 by providing the arc-shaped groove 8, which improves the stability of the installation of the buffer member 7, and increases its contact area with the dial wheel 4, which can effectively reduce the vibration generated by the friction of metal parts and further improve the mute effect of the lock body.

[0037] As shown in the appendix Figures 1 to 3 As shown, a limit step 9 is respectively provided at the positions corresponding to the front and rear ends of the outer circular surface of the dial wheel 4, an installation hole 10 coaxial with the dial wheel 4 is respectively provided on the front and rear sides of the lock housing 1, a limit flange 11 is provided on the inner circular surface of the installation hole 10, and the two limit flanges 11 are respectively abutted against the corresponding limit steps 9, and a relief groove 12 for the corresponding limit flange 11 to be embedded is respectively provided on the front and rear sides of the buffer member 7. This design can realize the axial limit installation of the dial wheel 4 and realize its function of rotating and installing on the lock housing 1. At the same time, the relief groove 12 is provided on the buffer member 7 to avoid interference in installation with the limit flange 11.

[0038] As shown in the appendix Figure 1 As shown, an arc-shaped stroke limit groove 13 is provided on the inner circular surface of the limit flange 11, and a stroke limit protrusion 14 that can be movably arranged in the stroke limit groove 13 is provided on the dial wheel 4. When the stroke limit protrusion 14 abuts against the end of the stroke limit groove 13, the rotation of the dial wheel 4 is limited. This design can limit the rotation angle of the dial wheel 4 and avoid the excessive rotation of the dial wheel 4 driven by the handle, which causes the linkage arm 3 to be squeezed and deformed by the lock housing 1.

[0039] As shown in the appendix Figure 4 As shown, a plurality of hollow grooves 15 are provided on the buffer member 7. In this embodiment, the number of the hollow grooves 15 is two, and they are symmetrically arranged on the left and right sides of the end of the buffer member 7. This design can not only reduce the weight of the buffer member 7, but also reduce the amount of raw materials used for the buffer member 7 and reduce costs.

[0040] As shown in the appendix Figure 2As shown, a long hole 16 is provided on the linkage arm 3. One end of the long hole 16 away from the locking tongue 2 serves as an abutting portion 17. A driving protrusion 18 that extends into the long hole 16 and cooperates with the abutting portion 17 is provided on the outer circumferential surface of the dial 4. When the dial 4 is rotated, the driving protrusion 18 on the dial 4 acts on the abutting portion 17 on the linkage arm 3, driving the linkage arm 3 to move, and further driving the locking tongue 2 to retract into the lock housing 1 to achieve unlocking.

[0041] As shown in the attached Figure 1 and attached Figure 2 As shown, a limiting bend 19 that extends outward is provided at one end of the linkage arm 3 corresponding to the abutting portion 17. An outer hole 20 for the limiting bend 19 to extend into and move is provided on the lock housing 1. After the locking tongue 2 drives the linkage arm 3 to move outward under the drive of the reset member 5, the limiting bend 19 abuts against the end of the outer hole 20 to form a limit. When the locking tongue 2 extends out of the lock housing 1 and reaches the limit position of locking, the linkage arm 3 can be limited to prevent the locking tongue 2 from completely disengaging from the lock housing 1.

[0042] As shown in the attached Figure 5 and attached Figure 6 As shown, a positioning hole 21 is further provided on the linkage arm 3. A positioning block 22 that fits with the positioning hole 21 is provided on the side of the locking tongue 2. A protective sleeve 23 is also sleeved on the outer periphery of the locking tongue 2. The protective sleeve 23 can be made of plastic material. The protective sleeve 23 wraps the positioning block 22 and the positioning hole 21 inside. Among them, the protective sleeve 23 is made of plastic material, making it deformable and easier to install. The front and rear ends of the protective sleeve 23 are limited by providing limiting protrusions or stepped structures on the locking tongue 2. The detachable structure of the linkage arm 3 and the locking tongue 2 not only facilitates the pre - processing and assembly, but also is conducive to the later maintenance and replacement. At the same time, sleeving the protective sleeve 23 on the outer periphery of the locking tongue 2 can not only protect the locking tongue 2, but also fix the connection part between the linkage arm 3 and the locking tongue 2, ensuring the reliability of the connection structure between the two.

[0043] In addition, the lock housing 1 is formed by detachably connecting an upper housing and a lower housing, and can be specifically assembled together by means such as snap - connection and screw - connection, so as to facilitate the installation of internal components.

Claims

1. A silent lock body, comprising a lock case (1), a lock tongue (2) arranged at one end of the lock case (1), a linkage arm (3) arranged on the lock tongue (2), a dial (4) rotatably arranged on the lock case (1) and cooperating with the linkage arm (3), and a reset member (5) arranged in the lock case (1) for resetting the lock tongue (2). One end of the lock case (1) is provided with a sliding hole (6) for the lock tongue (2) to retract into or slide out of the inner cavity of the lock case (1). When the dial (4) is rotated, the dial (4) drives the linkage arm (3) to cause the lock tongue (2) to retract into the inner cavity of the lock case (1); characterized in that: The invention also comprises a buffer member (7) which is arranged in the lock housing (1), and when the dial wheel (4) drives the linkage arm (3) to cause the lock tongue (2) to be completely retracted into the inner cavity of the lock housing (1), the inner end of the linkage arm (3) abuts against the buffer member (7).

2. The mute lock body according to claim 1, wherein: The buffer component (7) is made of elastic material.

3. A silent lock body according to claim 1, characterized in that: The buffer member (7) is sandwiched between the inner end of the lock housing (1) and the thumbwheel (4), and the left and right sides of the buffer member (7) respectively abut against the left and right sides of the inner cavity of the lock housing (1), and the front and rear sides of the buffer member (7) respectively abut against the front and rear sides of the inner cavity of the lock housing (1).

4. The silent lock body according to claim 3, characterized in that: An arc-shaped groove (8) is provided on one side of the buffer member (7) close to the thumbwheel (4), and the arc-shaped groove (8) is matched with the outer circumferential surface of the thumbwheel (4).

5. The mute lock body according to claim 3, characterized in that: A limiting step (9) is respectively provided at positions corresponding to the front and rear ends of the outer circumferential surface of the thumbwheel (4); a mounting hole (10) coaxial with the thumbwheel (4) is respectively provided on the front and rear sides of the lock housing (1); a limiting flange (11) is provided on the inner circumferential surface of the mounting hole (10); the two limiting flanges (11) are respectively abutted against the corresponding limiting steps (9); and a clearance groove (12) for the corresponding limiting flange (11) to be embedded is respectively provided on the front and rear sides of the buffer (7).

6. The mute lock body according to claim 5, characterized in that: The inner circular surface of the limit flange (11) is provided with an arc-shaped travel limit groove (13), and the thumbwheel (4) is provided with a travel limit protrusion (14) movably arranged in the travel limit groove (13). When the travel limit protrusion (14) abuts against the end of the travel limit groove (13), the thumbwheel (4) is limited in rotation.

7. The mute lock body according to claim 1, characterized in that: The buffer member (7) is provided with a plurality of hollow grooves (15).

8. The mute lock body according to claim 1, characterized in that: The linkage arm (3) is provided with a long hole (16), one end of the long hole (16) away from the lock tongue (2) serves as an abutment portion (17), and the outer circumferential surface of the thumbwheel (4) is provided with a driving protrusion (18) extending into the long hole (16) and cooperating with the abutment portion (17).

9. The mute lock body according to claim 8, wherein: One end of the linkage arm (3) corresponding to the abutment portion (17) is provided with a limit bend (19) extending outward, and the lock housing (1) is provided with an outer hole (20) for the limit bend (19) to extend into and move. After the lock tongue (2) drives the linkage arm (3) outward under the drive of the reset member (5), the limit bend (19) abuts against the end of the outer hole (20) to form a limit.

10. A silent lock body according to claim 1, characterized in that: The linkage arm (3) is also provided with a positioning hole (21), the side of the lock tongue (2) is provided with a positioning block (22) which fits with the positioning hole (21), and the outer periphery of the lock tongue (2) is also provided with a protective sleeve (23), and the protective sleeve (23) covers the positioning block (22) and the positioning hole (21) inside.

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