A mute lock tongue structure for a door lock

Abstract

This utility model belongs to the field of door lock technology, specifically a silent latch structure for door locks. It includes a main housing, a latch body, and a turntable. The latch body is slidably connected to one side of the main housing. The main housing has a through-hole corresponding to the latch body. A slider is fixedly connected to one side of the latch body. The inner wall of the main housing has a groove corresponding to the slider. A slide rod is fixedly connected within the groove. The slider has a through-hole corresponding to the slide rod. A first spring is sleeved on the slide rod. The two ends of the first spring are fixedly connected to the slider and the inner wall of the groove, respectively. Multiple buffer blocks are fixedly connected to the end of the latch body near the slider. Multiple rubber pads corresponding to the buffer blocks are fixedly connected to the inner wall of the main housing near the through-hole. This utility model, through the magnetic latch structure and buffer structure, can effectively reduce noise generated during the extension and retraction of the latch, thereby effectively improving the performance of the door lock.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, and in particular to a silent latch structure for door locks. Background Technology

[0002] Currently, all locks on the market, whether smart or mechanical, have a latch. The latch is moved by the handle, thus opening and closing the door. Traditional locks typically use metal latches, which generate noise during opening and closing due to the impact or friction between the components. As people's living standards improve, they want to minimize this noise in both offices and homes.

[0003] The existing patent "CN201921350630.6" proposes a silent latch structure, including a lock body and a backing plate. The lock body is provided with a latch and a pull rod for driving the latch to move. The backing plate is provided with a latch hole adapted to the latch. The latch includes a latch body and a friction tongue. An opening groove is provided in the middle part of the latch body, and the friction tongue is placed in the opening groove. A left anti-collision block and a right anti-collision block are respectively provided on the two side walls of the latch body.

[0004] However, existing latch structures generally use springs and levers to control the extension and retraction of the latch, which cannot effectively solve the noise problem generated by the latch during the extension and retraction process, thus affecting the performance of the door lock. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that the latch structure mentioned in the background art generally uses a spring and pull rod structure to control the extension and retraction of the latch, which cannot effectively solve the problem of noise generated by the latch during the extension and retraction process. Therefore, a silent latch structure for door locks is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A silent latch structure for a door lock includes a main housing, a latch body, and a turntable. The latch body is slidably connected to one side of the main housing. The main housing has a through-hole corresponding to the latch body. A slider is fixedly connected to one side of the latch body. The inner wall of the main housing has a groove corresponding to the slider. A slide rod is fixedly connected in the groove. The slider has a through-hole corresponding to the slide rod. A first spring is sleeved on the slide rod. The two ends of the first spring are fixedly connected to the slider and the inner wall of the groove, respectively. Multiple buffer blocks are fixedly connected to the end of the latch body near the slider. Multiple rubber pads corresponding to the buffer blocks are fixedly connected to the inner wall of the main housing near the through-hole. The turntable is rotatably connected to the inner wall of the main housing via a rotating shaft. One end of the rotating shaft passes through the inner wall of the main housing and extends outward. A magnet is fixedly connected to the side of the turntable near the latch body. A guide groove is provided at the bottom inner part of the main housing. A guide mechanism corresponding to the turntable is fixedly connected in the guide groove.

[0008] Preferably, a plurality of rubber balls are slidably connected inside the through-hole, and the edges of the rubber balls are in contact with the locking tongue body.

[0009] Preferably, the guiding mechanism includes a guide rod and a guide block, the guide block is slidably sleeved on the outside of the guide rod, the guide block is rotatably connected to the turntable through a transmission rod, and a second spring is sleeved on the guide rod, the two ends of the second spring being fixedly connected to the guide block and the inner wall of the guide groove, respectively.

[0010] Preferably, a limiting block is fixedly connected to the side of the turntable away from the magnet, and a stop block corresponding to the limiting block is fixedly connected to the inner wall of the main housing.

[0011] Preferably, the exterior of the latch body is coated with a magnetic material, and the elastic force of the first spring is less than half of the magnetic force between the latch body and the magnet.

[0012] Preferably, the edge of the main housing is provided with multiple fastening ports.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The magnetic latch structure and buffer structure in this utility model can effectively reduce the noise generated by the latch during extension and retraction, thereby effectively improving the performance of the door lock;

[0015] 2. The buffer block and rubber pad in this utility model can play a shock-absorbing and buffering role during the extension of the latch body. At the same time, the rubber ball can reduce the friction between the latch body and the inner wall of the passage. The guide mechanism can play a traction and guiding role for the turntable. Attached Figure Description

[0016] Figure 1This is a schematic diagram of a silent latch structure for a door lock proposed in this utility model;

[0017] Figure 2 This is a side view of the latch body in a silent latch structure for door locks proposed in this utility model.

[0018] In the diagram: 1 Main housing, 2 Locking tongue body, 3 Turntable, 4 Slider, 5 Slide rod, 6 First spring, 7 Buffer block, 8 Rubber pad, 9 Rotary shaft, 10 Magnet, 11 Rubber ball, 12 Guide rod, 13 Guide block, 14 Transmission rod, 15 Second spring, 16 Limiting block, 17 Stop block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-2 A silent latch structure for a door lock includes a main housing 1, a latch body 2, and a turntable 3. The latch body 2 is slidably connected to one side of the main housing 1. The edge of the main housing 1 is provided with multiple fastening holes to facilitate locking and fixing the main housing 1. The main housing 1 is provided with a through-hole corresponding to the latch body 2. Multiple rubber balls 11 are slidably connected in the through-hole. The edges of the rubber balls 11 contact the latch body 2 to reduce the friction between the latch body 2 and the inner wall of the through-hole.

[0021] In this embodiment, a slider 4 is fixedly connected to one side of the latch body 2. A groove corresponding to the slider 4 is provided on the inner wall of the main housing 1. A slide rod 5 is fixedly connected in the groove to support the slider 4. A through hole corresponding to the slide rod 5 is provided on the slider 4. A first spring 6 is sleeved on the slide rod 5. The two ends of the first spring 6 are fixedly connected to the slider 4 and the inner wall of the groove, respectively, to provide a certain elastic support for the slider 4. The outside of the latch body 2 is coated with a magnetic material. The elastic force of the first spring 6 is less than half of the magnetic force between the latch body 2 and the magnet 10, ensuring that the magnetic force between the magnet 10 and the latch body 2 is greater than the elastic force of the first spring 6.

[0022] In this embodiment, a plurality of buffer blocks 7 are fixedly connected to one end of the latch body 2 near the slider 4. A plurality of rubber pads 8 corresponding to the buffer blocks 7 are fixedly connected to the inner wall of the main housing 1 near the opening, which play a buffering and shock-absorbing role for the latch body 2. The turntable 3 is rotatably connected to the inner wall of the main housing 1 through the rotating shaft 9. One end of the rotating shaft 9 passes through the inner wall of the main housing 1 and extends outward. A magnet 10 is fixedly connected to the side of the turntable 3 near the latch body 2, which is used to drive the latch body 2 to retract. A limit block 16 is fixedly connected to the side of the turntable 3 away from the magnet 10. A stop block 17 corresponding to the limit block 16 is fixedly connected to the inner wall of the main housing 1, which limits the rotation angle of the turntable 3.

[0023] In this embodiment, the inner bottom of the main housing 1 is provided with a guide groove, and a guide mechanism corresponding to the turntable 3 is fixedly connected in the guide groove to keep the magnet 10 away from the latch body 2. The guide mechanism includes a guide rod 12 and a guide block 13. The guide block 13 is slidably sleeved on the outside of the guide rod 12. The guide block 13 is rotatably connected to the turntable 3 through the transmission rod 14. A second spring 15 is sleeved on the guide rod 12. The two ends of the second spring 15 are fixedly connected to the guide block 13 and the inner wall of the guide groove, respectively, to provide elastic support for the guide block 13.

[0024] In this embodiment, when the door is closed, the latch body 2 automatically extends out of the opening under the attraction of the magnet in the door lock groove, thereby locking the door. When it is necessary to open the door, the rotating shaft 9 drives the turntable 3 to rotate, causing the magnet 10 to rotate to the side close to the latch body 2. At this time, under the action of magnetic force, the magnet 10 drives the latch body 2 to disengage from the door lock groove. The setting of the first spring 6 can play an elastic traction role on the slider 4 and the latch body 2, so that the latch body 2 is in a retracted state. The guide mechanism can keep the magnet 10 on the turntable 3 away from the latch body 2.

[0025] In this embodiment, the magnetic latch structure and buffer structure effectively reduce noise generated during the extension and retraction of the latch, thereby improving the usability of the door lock.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A silent latch structure for a door lock, comprising a main housing (1), a latch body (2), and a turntable (3), characterized in that: The latch body (2) is slidably connected to one side of the main housing (1). The main housing (1) has a through-hole corresponding to the latch body (2). A slider (4) is fixedly connected to one side of the latch body (2). The inner wall of the main housing (1) has a groove corresponding to the slider (4). A slide rod (5) is fixedly connected in the groove. The slider (4) has a through-hole corresponding to the slide rod (5). A first spring (6) is sleeved on the slide rod (5). The two ends of the first spring (6) are fixedly connected to the slider (4) and the inner wall of the groove, respectively. Multiple buffer blocks (7) are fixedly connected to one end near the slider (4). Multiple rubber pads (8) corresponding to the buffer blocks (7) are fixedly connected to the inner wall of the main housing (1) near the opening. The turntable (3) is rotatably connected to the inner wall of the main housing (1) through a rotating shaft (9). One end of the rotating shaft (9) passes through the inner wall of the main housing (1) and extends outward. A magnet (10) is fixedly connected to the side of the turntable (3) near the latch body (2). A guide groove is provided at the bottom of the inner part of the main housing (1). A guide mechanism corresponding to the turntable (3) is fixedly connected in the guide groove.

2. The silent latch structure for a door lock according to claim 1, characterized in that: Multiple rubber balls (11) are slidably connected inside the opening, and the edges of the rubber balls (11) are in contact with the locking tongue body (2).

3. The silent latch structure for a door lock according to claim 1, characterized in that: The guiding mechanism includes a guide rod (12) and a guide block (13). The guide block (13) is slidably sleeved on the outside of the guide rod (12). The guide block (13) is rotatably connected to the turntable (3) through a transmission rod (14). A second spring (15) is sleeved on the guide rod (12). The two ends of the second spring (15) are fixedly connected to the guide block (13) and the inner wall of the guide groove, respectively.

4. The silent latch structure for a door lock according to claim 1, characterized in that: A limiting block (16) is fixedly connected to the side of the turntable (3) away from the magnet (10), and a stop block (17) corresponding to the limiting block (16) is fixedly connected to the inner wall of the main housing (1).

5. A silent latch structure for a door lock according to claim 1, characterized in that: The exterior of the latch body (2) is coated with a magnetic material, and the elastic force of the first spring (6) is less than half of the magnetic force between the latch body (2) and the magnet (10).

6. The silent latch structure for a door lock according to claim 1, characterized in that: The edge of the main housing (1) is provided with multiple fastening ports.

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