Silent door lock

Abstract

The utility model relates to the technical field of door locks, and provides a mute door lock. The latch bolt is arranged on the lock body, the first transmission assembly is arranged in the lock body and is connected with the latch bolt, the handle is arranged on the lock body and is connected with the first transmission assembly to drive the latch bolt to do telescopic motion, and the buckle box is arranged on a door frame and is matched with the latch bolt; the two handles are arranged on the two sides of the lock body respectively, the lock body comprises an inner box with a containing cavity and two fixing plates arranged on the two opposite surfaces of the inner box respectively, the first transmission assembly and the latch bolt are both arranged in the inner box, two handle holes are formed in the inner box in the height direction in a penetrating mode, and the two handle holes are communicated with the containing cavity. And the two handles are respectively mounted. According to the door lock, the handles are arranged on the two sides of the lock body, the separated fixing plate design is adopted, the independent first through holes are formed in cooperation with the fixing plate and correspond to the handle holes respectively, the sound transmission path is further blocked, and the noise problem in the door lock opening and closing process is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of door locks, in particular to a mute door lock. BACKGROUND

[0002] As a common hardware, door locks are widely used in homes, offices and other scenarios that require privacy protection. With the improvement of people's living standards and the progress of technology, the design of door locks not only focuses on safety, but also gradually develops towards comfort and mute performance. Modern door locks are usually composed of a lock body, a lock tongue, a transmission assembly, a handle and a lock box, which work together to achieve the basic functions of the door lock. However, in practical applications, how to balance the functionality and user experience of the door lock has become the focus of the industry.

[0003] Currently, traditional door locks usually adopt a double-handle design, that is, a handle is arranged on each side of the lock body and the lock tongue is driven to move by the transmission assembly. Specifically, this structure relies on a through hole passing through the lock body to install the handle and transmits power through the internal transmission assembly to realize the extension and retraction movement of the lock tongue.

[0004] Since the two handles are arranged opposite to each other and connected through the through hole, when the user operates the handle on the outside to drive the transmission assembly and then drive the lock tongue to move, the mechanical noise generated will directly pass into the room through the through hole, significantly reducing the user's experience, especially in a quiet environment, which needs to be further improved. CONTENT OF THE INVENTION

[0005] In order to solve the above technical problems, the present application provides a mute door lock.

[0006] The mute door lock provided by the present application adopts the following technical scheme:

[0007] A mute door lock, comprising a lock body, a latch arranged on the lock body, a first transmission assembly arranged in the lock body and connected with the latch, a handle arranged on the lock body and connected with the first transmission assembly to drive the latch to move, a lock box arranged on a door frame and matched with the latch; the handle is provided with two handles arranged on the two sides of the lock body respectively, the lock body comprises an inner box with a receiving cavity and two fixing plates arranged on the opposite surfaces of the inner box respectively, the first transmission assembly and the latch are arranged in the inner box, the inner box is provided with two handle holes passing through along the height direction of the inner box to respectively accommodate the two handles, and each of the two fixing plates is provided with a first through hole corresponding to one of the handle holes.

[0008] By adopting the technical scheme, one first through hole is arranged on each of the two fixed plates to correspond to one handle hole respectively, the first through hole is arranged as a blind hole at one end, and the two handles are arranged staggeredly, the staggered arrangement changes the straight path of sound propagation, the mechanical noise generated by the external handle is difficult to directly transmit to the other side through the internal structure, the two fixed plates play a role of blocking sound propagation during the unlocking process of the two handles respectively, and thus the mute performance of the door lock is improved significantly, and the use comfort of the user is enhanced.

[0009] Preferably, the two fixed plates are provided with a connecting plate away from one side of the latch tongue, and the connecting plate is connected to the two fixed plates.

[0010] By adopting the technical scheme, the arrangement of the connecting plate can enhance the structural stability between the two fixed plates, avoid deformation or loosening of the fixed plate caused by frequent operation in the long-term use process, and thus improve the overall reliability of the door lock. Meanwhile, the existence of the connecting plate can further block the transmission of sound between the fixed plates, and indirectly improve the mute effect of the door lock.

[0011] Preferably, the surfaces of the two fixed plates close to each other are both provided with a sound insulation layer.

[0012] By adopting the technical scheme, the sound insulation layer arranged between the fixed plates can effectively reduce the transmission of noise generated by the transmission assembly in the lock body during the working process, and improve the mute performance of the door lock.

[0013] Preferably, the first transmission assembly comprises two first dials respectively rotating through the two first through holes, two hinge arms respectively arranged on the sides of the two first dials away from the latch tongue, a hinge rod hinged to the two hinge arms, a sliding rod connected to one of the first dials, and a return spring coaxially sleeved on the sliding rod, the outer peripheral wall of the first dial is provided with a limiting plate, the inner wall of the inner box is provided with a limiting column for abutting against the limiting plate in the rotating path of the first dial, and the sliding rod slides along the width direction of the lock body.

[0014] By adopting the technical scheme, since the two handles are arranged corresponding to one latch tongue, the two staggered handles and the first transmission assembly are arranged, specifically, the hinge arms are arranged to be hinged to the two first dials, so as to drive the latch to slide.

[0015] Preferably, one end of the sliding rod away from the latch tongue is fixedly connected with a sliding block, the inner wall of the inner box is provided with a first sliding groove for sliding connection of the sliding block, and the sliding block is provided with a ball for sliding connection with the inner wall of the first sliding groove.

[0016] By adopting the technical scheme, the end of the sliding rod away from the latch is fixedly connected with a sliding block, and the sliding block is provided with a ball that is in sliding connection with the inner wall of the first sliding groove, and the ball reduces the friction between the sliding block and the first sliding groove, thereby improving the response speed of the sliding rod, reducing the noise generated by friction, and further improving the overall mute performance of the door lock.

[0017] Preferably, the outer peripheral wall of the limiting column is provided with an elastic pad.

[0018] By adopting the technical scheme, the outer peripheral wall of the limiting column is provided with an elastic pad, which can effectively reduce the rigid collision between the limiting column and the limiting plate, thereby significantly reducing the noise generated during transmission.

[0019] Preferably, the second transmission assembly is further provided with a square tongue arranged on the lock body and a second transmission assembly connected with the square tongue, and the inner box is provided with two lock holes for inserting a key along the height direction of the inner box, and each of the two fixing plates is provided with a second through hole corresponding to one of the lock holes.

[0020] By adopting the technical scheme, the same is true for some door locks that need to achieve the effect of locking the door, and a square tongue and a corresponding second transmission assembly are arranged thereon, and in the prior art, a lock hole is arranged in the process of driving the square tongue to slide, and the same noise as the handle is generated, and therefore, a second through hole is arranged on each of the two fixing plates to correspond to one of the lock holes, so that one end of the second through hole is arranged as a blind hole, and the two lock holes are arranged in a staggered manner, thereby effectively improving the mute effect of the door lock.

[0021] Preferably, the second transmission assembly comprises two second dials respectively rotating through the two lock holes, two incomplete gears respectively arranged on the outer peripheral walls of the two second dials and in mesh with each other, a dial piece fixed with one of the incomplete gears, a sliding plate connected with the square tongue, and a sliding column arranged on the dial piece, the sliding plate is provided with a second sliding groove along the width direction of the inner box, the second dial is arranged through the second sliding groove, and the sliding plate is provided with a third sliding groove for sliding connection of the sliding column; the outer peripheral wall of the second dial is also provided with a limiting plate, and the inner wall of the inner box located on the rotating path of the second dial is also provided with a limiting column for abutting against the limiting plate.

[0022] By adopting the technical scheme, for the two lock holes, two second dials and incomplete gears are arranged correspondingly, so that the action of the square tongue can be triggered by the inner and outer lock holes, and the transmission stability is improved by the linkage structure of the dial piece and the sliding plate.

[0023] In summary, the utility model has the following beneficial effects:

[0024] By setting the handle on both sides of the lock body and adopting the separated fixing plate design, the through hole design in the traditional structure is avoided, the mechanical noise is effectively reduced from the outside to the inside, and the mute performance of the door lock is improved. The independent first through hole is opened in the fixing plate to correspond to the handle hole, a closed structure is formed, the sound propagation path is further blocked, and the noise problem of the door lock in the opening and closing process is improved. The independent second through hole is arranged to correspond to the lock hole to block the corresponding noise problem. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application;

[0026] Figure 2 is a schematic diagram of the internal structure of the inner box in embodiment 1 of the present application;

[0027] Figure 3 is a schematic diagram of the structure of the fixing plate in embodiment 1 of the present application;

[0028] Figure 4 is a schematic diagram of the internal structure of the inner box in embodiment 2 of the present application;

[0029] Figure 5 is a schematic diagram of the structure of the fixing plate in embodiment 2 of the present application;

[0030] Figure 6 is a schematic diagram of the structure of the second driving assembly in embodiment 2 of the present application;

[0031] Figure 7 is a schematic diagram of the structure of the sound insulation layer in embodiment 3 of the present application;

[0032] Figure 8 is a schematic diagram of the structure of the ball in embodiment 3 of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS: 1, lock body; 11, inner box; 111, accommodating cavity; 112, handle hole; 113, first sliding groove; 114, lock hole; 12, fixing plate; 121, first through hole; 122, second through hole; 123, sound insulation layer; 2, latch tongue; 3, first transmission assembly; 31, first rotating wheel; 32, hinged arm; 33, hinged rod; 34, sliding rod; 341, sliding block; 35, return spring; 4, handle; 5, catch box; 6, connecting plate; 7, limiting plate; 71, limiting column; 711, elastic pad; 8, square tongue; 9, second transmission assembly; 91, second rotating wheel; 92, incomplete gear; 93, pushing piece; 94, sliding plate; 941, second sliding groove; 942, third sliding groove; 95, sliding column; 10, ball. DETAILED DESCRIPTION

[0034] The following will be described in detail with reference to the accompanying drawings Figures 1-8Further details of the application are provided below.

[0035] The application discloses a mute door lock.

[0036] Embodiment 1

[0037] A mute door lock, referring to Figure 1 、 Figure 2 , comprises a lock body 1, a latch 2 arranged on the lock body 1, a first transmission assembly 3 arranged in the lock body 1 and connected with the latch 2, a handle 4 arranged on the lock body 1 and connected with the first transmission assembly 3 to drive the latch 2 to perform extension and contraction movement, and a catch box 5 arranged on a door frame and matched with the latch 2.

[0038] Referring to Figure 2 、 Figure 3 , the lock body 1 comprises an inner box 11 having a receiving cavity 111 and two fixed plates 12 arranged on opposite surfaces of the inner box 11. The inner box 11 can be made of metal material (such as stainless steel) to enhance the strength and have good sound insulation properties. In addition, a plastic material with a certain thickness can be selected to replace part of the area to reduce weight and cost. Further, the two fixed plates 12 away from one side of the latch 2 are provided with a connecting plate 6 connected to the two fixed plates 12 to enhance the structural stability between the two fixed plates 12.

[0039] In the embodiment, the first transmission assembly 3 and the latch 2 are arranged in the inner box 11. The handle 4 is arranged on two sides of the lock body 1 and arranged in a staggered manner. Specifically, the inner box 11 is provided with two handle holes 112 along the height direction to respectively install the two handles 4. The two fixed plates 12 are provided with a first through hole 121 corresponding to one of the handle holes 112.

[0040] For the sliding movement of the latch 2, the first transmission assembly 3 comprises a disc-shaped first dial 31, a hinged arm 32, a hinged rod 33, a sliding rod 34 and a return spring 35. The first dial 31 is generally a disc-shaped part that can rotate around its central axis. To limit the rotation range of the first dial 31, the outer peripheral wall of the first dial 31 is provided with a limiting plate 7, and the inner wall of the inner box 11 is provided with a limiting column 71 abutting against the limiting plate 7 in the rotation path of the first dial 31. Further, the outer peripheral wall of the limiting column 71 is provided with an elastic pad 711 to buffer the impact force generated by the rigid contact between the limiting column 71 and the limiting plate 7 and to reduce the corresponding noise. In order to facilitate processing and manufacturing, the first dial 31 is recommended to be made of aluminum alloy material; of course, other suitable alloy steel materials can also be used according to actual needs.

[0041] The two hinged arms 32 are hinged by a hinged rod 33. The sliding rod 34 is used to drive the latch 2 to slide linearly, specifically, one end of the sliding rod 34 is fixedly connected with the latch 2, and the other end of the sliding rod 34 is fixedly connected with a sliding block 341, and the inner wall of the inner box 11 is provided with a first sliding groove 113 for sliding connection of the sliding block 341. The reset spring 35 is coaxially sleeved on the outer peripheral wall of the sliding rod 34, and the two ends of the reset spring 35 are fixedly connected with the latch 2 and the sliding block 341 respectively. After the handle 4 is applied with a rotating force or is loosened, the sliding rod 34 slides along the width direction of the lock body 1 under the action of the reset spring 35.

[0042] The implementation principle of the mute door lock in the embodiment of the application is that the handle 4 is arranged on both sides of the lock body 1, and the separate fixed plate 12 is designed, and the independent first through hole 121 corresponding to the handle hole 112 is arranged in the fixed plate 12, so that the sound propagation path is further blocked, and the noise problem of the door lock in the opening and closing process is improved.

[0043] Embodiment 2

[0044] Referring to Figure 4 , Figure 5 The difference between the embodiment and the embodiment 1 is that, in order to further enhance the safety and operation convenience of the door lock, the square tongue 8 arranged on the lock body 1 and the second transmission assembly 9 arranged in the lock body 1 and connected with the square tongue 8 are further arranged in the embodiment. The inner box 11 is provided with two lock holes 114 for key insertion along the height direction, and the two fixed plates 12 are provided with a second through hole 122 corresponding to one of the lock holes 114.

[0045] Referring to Figure 4 , Figure 6 As for the movement of the square tongue 8, the second transmission assembly 9 comprises two second dials 91, two incomplete gears 92, a dial piece 93, a sliding plate 94 and a sliding column 95. The two second dials 91 are respectively arranged in the two lock holes 114 arranged in the height direction of the lock body 1, the two incomplete gears 92 are arranged on the outer peripheral walls of the two first dials 31 and are fixedly connected with the two first dials 31, the two incomplete gears 92 are meshed with each other, the dial piece 93 is arranged on one of the two incomplete gears 92, the sliding plate 94 is driven to move, and then the square tongue 8 is driven to act to complete the locking or unlocking operation. The sliding plate 94 is provided with a second sliding groove 941 along the width direction of the inner box 11, the second dial 91 provided with the dial piece 93 is arranged in the second sliding groove 941, the sliding plate 94 is further provided with a third sliding groove 942 for arranging the sliding column 95 to pass through, so as to guide the sliding column 95 to slide in a certain direction, and the sliding column 95 is fixedly connected with the end of the dial piece 93 away from the second dial 91.

[0046] The outer circumferential wall of the second dial 91 is also provided with a limiting plate 7, and the inner wall of the inner box 11 is also provided with a limiting column 71 for abutting against the limiting plate 7.

[0047] For the lock body 1 provided with the lock hole 114, the lock hole 114 is arranged in a staggered manner like the handle 4, so as to reduce the noise problem caused by the key passing through the lock hole 114 to lock the door.

[0048] Embodiment 3:

[0049] Referring to Figure 7 The difference between the embodiment 2 and the embodiment 3 is that the sound insulation layer 123 is fixedly connected to the mutually close surfaces of the two fixed plates 12. The sound insulation layer 123 can be made of sound-absorbing foam, and the honeycomb grid structure is arranged on the sound insulation layer 123, so as to greatly reduce the residual sound.

[0050] Referring to Figure 8 Further, the sliding block 341 is provided with the ball 10 in sliding connection with the inner wall of the first sliding groove 113, and the inner wall of the second sliding groove 941 in abutment with the second dial 91 is also provided with the ball 10, so as to reduce the corresponding friction, improve the smoothness, and reduce the noise caused by the corresponding friction.

[0051] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A silent door lock, characterized in that: The lock body includes a lock body (1), a latch (2) disposed on the lock body (1), a first transmission component (3) disposed inside the lock body (1) and connected to the latch (2), a handle (4) disposed on the lock body (1) and connected to the first transmission component (3) to drive the latch (2) to extend and retract, and a latch box (5) mounted on the door frame to cooperate with the latch (2); the handle (4) is provided in two and is respectively disposed on both sides of the lock body (1). The lock body (1) includes an inner box (11) with a receiving cavity (111) and two fixing plates (12) respectively disposed on opposite surfaces of the inner box (11). The first transmission component (3) and the latch (2) are both disposed inside the inner box (11). The inner box (11) has two handle holes (112) through it along its height direction for the installation of two handles (4) respectively. Each of the two fixing plates (12) has a first through hole (121) to correspond to one of the handle holes (112) respectively.

2. A silent door lock according to claim 1, characterized in that: A connecting plate (6) is provided on the side of the two fixing plates (12) away from the oblique tongue (2), and the connecting plate (6) is connected to the two fixing plates (12).

3. A silent door lock according to claim 1, characterized in that: The surfaces of the two fixing plates (12) that are close to each other are provided with sound insulation layers (123).

4. A silent door lock according to claim 1, characterized in that: The first transmission assembly (3) includes two first dial wheels (31) that are rotatably inserted through the two first through holes (121), two hinge arms (32) that are respectively disposed on the side of the two first dial wheels (31) away from the tongue (2), a hinge rod (33) hinged to the two hinge arms (32), a sliding rod (34) connected to one of the first dial wheels (31), and a return spring (35) coaxially sleeved on the sliding rod (34). The outer peripheral wall of the first dial wheel (31) is provided with a limit plate (7). The inner wall of the inner box (11) is provided with a limit post (71) for abutting against the limit plate (7) on the rotation path of the first dial wheel (31). The sliding rod (34) slides along the width direction of the lock body (1).

5. A silent door lock according to claim 4, characterized in that: The sliding rod (34) is fixedly connected to a slider (341) at one end away from the oblique tongue (2). The inner wall of the inner box (11) is provided with a first groove (113) for the slider (341) to slide and connect. The slider (341) is provided with a ball (10) that slides and connects with the inner wall of the first groove (113).

6. A silent door lock according to claim 4, characterized in that: The outer peripheral wall of the limiting post (71) is provided with an elastic pad (711).

7. A silent door lock according to claim 1, characterized in that: It also includes a square tongue (8) disposed on the lock body (1) and a second transmission assembly (9) connected to the square tongue (8). The inner box (11) has two lock holes (114) for key insertion through it along its height direction. Both of the two fixing plates (12) have a second through hole (122) to correspond to one of the lock holes (114) respectively.

8. A silent door lock according to claim 7, characterized in that: The second transmission assembly (9) includes two second dials (91) that are rotatably passed through the two lock holes (114), two incomplete gears (92) that are respectively disposed on the outer peripheral walls of the two second dials (91) and mesh with each other, a paddle (93) fixed to one of the incomplete gears (92), a sliding plate (94) connected to the square tongue (8), and a sliding post (95) disposed on the paddle (93). The sliding plate (94) has a second sliding groove (941) along the width direction of the inner box (11). The second dials (91) pass through the second sliding groove (941). The sliding plate (94) has a third sliding groove (942) for sliding connection of the sliding post (95). The outer peripheral wall of the second dials (91) is also provided with a limiting plate (7). The inner wall of the inner box (11) located on the rotation path of the second dials (91) is also provided with a limiting post (71) for abutting against the limiting plate (7).

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