A silent latch
The design of plastic clips and spring clips guides the movement of the pin, solving the problem of pin sliding noise, achieving a silent effect, reducing maintenance costs, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXING DIFAN HARDWARE CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-30
AI Technical Summary
The pin can easily generate noise during sliding, affecting the user experience.
It adopts a plastic buckle and spring structure. Through the hinge relationship between the handle and the connecting piece, the guide pin moves to avoid friction between the pin and the inner wall of the channel. Combined with the spring to maintain the position, it achieves a silent effect.
It effectively suppresses and eliminates noise generated by pin slippage, improves quiet operation, reduces maintenance costs, and extends service life.
Smart Images
Figure CN224432273U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building materials technology, specifically relating to a silent latch. Background Technology
[0002] A bolt is a security component used to prevent doors and windows from being opened from the outside. A bolt generally consists of two parts: a movable rod and a bolt hole, also called the bolt "nose." The rod part is usually fixed to the door, and the nose is fixed to the door frame, with their positions corresponding. Modern door and window bolts are generally made of metal. The bolt slides through a channel. When the bolt slides out of the channel, one end inserts into the bolt hole, locking the door or window and preventing it from opening. Conversely, when the bolt slides into the channel, the door or window unlocks and can be opened freely. However, during the sliding process, the bolt can easily scrape against the channel, producing noise. Summary of the Invention
[0003] The purpose of this invention is to provide a silent latch, which aims to solve the problem of noise generated during the sliding of the latch, making the latch quieter during use.
[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:
[0005] A silent latch includes a pin, a drive assembly, a latch panel, and at least one plastic clip. The latch panel has a receiving cavity and a pin channel, the receiving cavity communicating with the pin channel, and the pin channel extending outward from one end of the latch panel. The pin passes through the pin channel, and the drive assembly can drive the pin to reciprocate within the pin channel under external force. The clip is located near the outlet end of the pin channel, and part of it penetrates into the pin channel, contacting both sides of the pin.
[0006] Based on the above solution and as a preferred embodiment of the above solution: the drive assembly includes a handle and a connecting piece, the handle and the connecting piece are received in the accommodating cavity, one end of the handle is a pulling part, and the end away from the pulling part is hinged to the pin panel; and the end near the accommodating cavity is hinged to one end of the connecting piece, and the end of the connecting piece away from the pin is hinged to the handle.
[0007] Based on the above solution and as a preferred embodiment of the above solution: a through guide groove is provided in the middle of the plastic buckle, and the minimum gap on the side of the guide groove is not less than the maximum width of the pin.
[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the plastic buckle has a symmetrical arc-shaped structure on both sides of the guide groove.
[0009] Based on the above solution and as a preferred solution: a plastic buckle mounting channel is provided on the pin panel, the plastic buckle mounting channel is partially connected to the pin rod channel, and the plastic buckle is inserted into the plastic buckle mounting channel.
[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the plastic buckle mounting channel extends inwardly symmetrically on the two sidewalls facing the plastic buckle with limiting protrusions, and the outer peripheral surface of the sidewalls, near its end edge, abuts against the end edge of the limiting protrusions.
[0011] Based on the above scheme and as a preferred embodiment of the above scheme: there are two connecting pieces, which are symmetrically arranged on both sides of the handle and the pin.
[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the pin panel is provided with multiple mounting holes.
[0013] Based on the above solution and as a preferred embodiment of the above solution: it further includes a spring piece, which remains in contact with the end of the handle that is hinged to the latch panel.
[0014] Based on the above scheme and as a preferred embodiment of the above scheme: the accommodating cavity is provided with a first limiting part and a second limiting part, and the spring piece is embedded in the space enclosed by the first limiting part and the second limiting part.
[0015] Based on the above scheme and as a preferred embodiment of the above scheme: the spring piece has an arched structure, with its highest point abutting against the handle, and its two ends contacting or abutting against the first limiting part and the second limiting part, respectively.
[0016] The outstanding and beneficial technical effects of this utility model compared to the prior art are as follows: Furthermore, through the hinged connection between the handle, connecting piece, and pin, the user can apply force to the pulling part, forcing it to rotate around the hinge axis between the handle and the pin panel. This pulls the connecting piece, causing the pin to move into the pin channel, thus removing the pin from the pin hole, unlocking the door / window. Conversely, when force is applied to the pulling part, forcing it to rotate around the hinge axis between the handle and the pin panel into the receiving cavity, this pushes the connecting piece, causing the pin to move out of the pin channel and insert into the pin hole, locking the door / window. During this process, a plastic clip is installed in the pin channel, allowing the pin to contact the clip, straightening and guiding the pin, preventing friction between the pin and the inner wall of the pin channel, thus effectively suppressing and eliminating noise caused by pin slippage. In addition, thanks to the spring mechanism, after the handle is rotated to the unlocked or locked position, the spring deformation and friction allow the handle to remain in its current position. Attached Figure Description
[0017] Figure 1 This is an exploded view of the overall structure of this utility model;
[0018] Figure 2 This is a bottom view of the overall structure of this utility model;
[0019] Figure 3 This is a three-dimensional view of the overall structure of this utility model;
[0020] Figure 4 This is an exploded view of the overall structure of Example 2;
[0021] Figure 5 This is a bottom view of the overall structure of Embodiment 2. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the given embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0023] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0024] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Example
[0025] As shown in Figures 1-3, this application discloses a silent latch, including a handle 1, a pin 2, a connecting piece 3, a latch panel 7, and at least one plastic buckle 8. The latch panel 7 has a receiving cavity 71 and a pin channel 72, the receiving cavity 71 communicating with the pin channel 72, and the pin channel 72 extending outwards from one end of the latch panel 7. The handle 1 and the connecting piece 3 are received within the receiving cavity 71. One end of the handle 1 is a pulling part 11, and the end away from the pulling part 11 is hinged to the latch panel 7. Specifically, pin holes 74 are provided on the latch panel 7 at the positions of the two side walls of the receiving cavity. Figure 1 As shown, handle 1 is placed in receiving cavity 71, and the first shaft hole 12 on handle 1 is aligned with the pin hole 74. Two first pins 4 are inserted into the pin hole 74 from the outside to the inside from the outside of the pin hole 74. The front end of the first pin 4 is inserted into the first shaft hole 12, realizing the hinge connection between handle and pin panel. Pin 2 passes through pin channel 72, and one end near receiving cavity 71 is hinged to one end of connecting piece 3 through second pin 5. The end of connecting piece 3 away from pin 2 is hinged to handle 1 through third pin 4a. Preferably, the hinge is located near the end of handle 1 that is hinged to pin panel 7. More preferably, there are two connecting pieces 3, which are symmetrically arranged on both sides of handle 1 and pin 2. The two connecting pieces 3 and handle 1 form a Y-shaped structure, so that when pin 2 is pulled, the force on pin 2 is more balanced, thereby enabling pin 2 to move straight and preventing it from deviating to one side. Thus, when force is applied to the pulling part 11 by hand and the handle is lifted upward, the connecting piece will be pulled to move the pin 2 into the pin channel 72; then, when the handle is rotated downward and moved into the receiving cavity, the connecting piece will be pushed and the pin 2 will be moved out of the pin channel 72, thereby driving the pin 2 to move within the pin channel 72.
[0026] The plastic clip 8 is located near the outlet of the pin channel 72, and part of it penetrates into the pin channel 72, contacting both sides of the pin 2. See details... Figure 2As shown, a snap-fit mounting channel 78 is provided on the pin panel 7, which is partially connected to the pin channel 72. The plastic snap-fit 8 is inserted into the snap-fit mounting channel 78. A through guide groove 81 is provided in the middle of the plastic snap-fit 8, and the minimum gap of the side surface 822 of the guide groove 81 is not less than the maximum width of the pin 2. The two side walls 82 of the guide groove 81 on the plastic snap-fit 8 have symmetrical arc-shaped structures. The snap-fit mounting channel 78 has symmetrical inwardly extending limiting protrusions 79 on the sides facing the two side walls 82 of the plastic snap-fit 8. The outer peripheral surface 821 of the side wall 82, near its end edge, abuts against the end edge of the limiting protrusion 79, thereby embedding and securing the plastic snap-fit 8 within the snap-fit mounting channel 78. Of course, the plastic snap-fit 8 is integrally injection molded using an injection molding machine, and its material can be PE, PP, polyurethane, nylon, etc. By using this installation method where the plastic clip 8 is fastened within the clip installation channel 78, when the plastic clip 8 wears out, it can be easily pried out of the plastic clip installation channel 78 and replaced with a new plastic clip 8. This allows for the repair and maintenance of the entire pin, reducing maintenance costs and significantly extending the service life of the pin.
[0027] Therefore, through the hinged connection between the handle, connecting piece, and pin, the user can apply force to the pulling part by hand, forcing the pulling part to rotate the handle around its hinge axis with the pin panel. This pulls the connecting piece, causing the pin to move into the pin channel, and thus remove the pin from the pin hole, unlocking the door and window. Conversely, when force is applied to the pulling part by hand, forcing the pulling part to rotate the handle around its hinge axis with the pin panel into the receiving cavity, this pushes the connecting piece, causing the pin to move out of the pin channel and into the pin hole, locking the door and window. During this process, a plastic clip is installed in the pin channel, allowing the pin to contact the clip, straightening and guiding the pin, preventing friction between the pin and the inner wall of the pin channel, thus effectively suppressing and eliminating noise caused by pin slippage.
[0028] Furthermore, in order to ensure that the handle 1 remains in its current position when it reaches the unlocked and locked positions of the door / window, and also to provide a clear tactile feel during operation, this embodiment also includes a spring 6. The spring 6 abuts against the end of the handle 1 that is hinged to the latch panel 7. Specifically, see... Figure 1As shown, a first limiting part 75 and a second limiting part 76 are provided in the accommodating cavity 71. The first end 6a and the second end 6b of the spring piece 6 abut against the first limiting part 75 and the second limiting part 76 respectively, thereby enabling the spring piece 6 to be embedded in the space enclosed by the first limiting part 75 and the second limiting part 76. Furthermore, in this embodiment, the spring piece 6 is preferably an arched structure, with its high point 6c abutting against the handle 1, and its two ends contacting or abutting against the first limiting part 75 and the second limiting part 76 respectively. When the handle 1 is lifted upward, the end of the handle 1 away from the pulling part 11 presses against the high point 6c, thereby positioning the handle 1 by the spring piece 6 high point 6c pressing against the end face of that end, thus maintaining its unlocked state. When the handle 1 is lowered and fully received into the receiving cavity 71, the spring piece 6 high point 6c presses against the lower end face of the handle away from the pulling part 11 and towards the bottom surface of the receiving cavity 71, thus positioning the handle 1 and maintaining its locked state.
[0029] In addition, multiple mounting holes 73 are provided on the latch panel 7, and the latch is fixed to the door or window by using screws 9 through the mounting holes 73. Example
[0030] The difference from Embodiment 1 is that, for the longer pin 2, the single plastic clip 8 will be difficult to maintain stable movement, resulting in scratching noise. For details, please refer to... Figure 4-5 As shown, in this embodiment, two plastic clips 8 are provided, which are located near the entrance and exit ends of the pin channel 72, respectively, so as to better limit the pin 2 and enable the pin to move back and forth in a straight manner within the pin channel 72, thereby avoiding the problem of noise caused by the pin 2 scraping against the inner wall of the pin channel 72.
[0031] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.
Claims
1. A silent latch characterized by: The device includes a pin (2), a drive assembly, a pin panel (7), and at least one plastic buckle (8). The pin panel (7) has a receiving cavity (71) and a pin channel (72). The receiving cavity (71) is connected to the pin channel (72), and the pin channel (72) extends outward from one end of the pin panel (7). The pin (2) passes through the pin channel (72), and the drive assembly can drive the pin (2) to reciprocate within the pin channel (72) under external force. The buckle (8) is located near the outlet of the pin channel (72), and part of it penetrates into the pin channel (72) and contacts both sides of the pin (2).
2. A silent latch according to claim 1, wherein: The drive assembly includes a handle (1) and a connecting piece (3). The handle (1) and the connecting piece (3) are received in the receiving cavity (71). One end of the handle (1) is a pulling part (11), and the end away from the pulling part (11) is hinged to the pin panel (7). The end near the receiving cavity (71) is hinged to one end of the connecting piece (3), and the end of the connecting piece (3) away from the pin (2) is hinged to the handle (1).
3. The silent latch of claim 1, wherein: The plastic buckle (8) has a through guide groove (81) in the middle, and the minimum gap of the side (822) of the guide groove (81) is not less than the maximum width of the pin (2).
4. A silent latch according to claim 3, wherein: The plastic buckle (8) has a symmetrical arc-shaped structure on both sides of the guide groove (81) on both sides of the guide groove (82).
5. A silent latch according to claim 4, wherein: A snap-fit mounting channel (78) is provided on the pin panel (7), which is partially connected to the pin rod channel (72), and the plastic snap-fit (8) is inserted into the snap-fit mounting channel (78).
6. A silent latch according to claim 5, characterized in that: The buckle mounting channel (78) extends symmetrically inwardly on the two sidewalls (82) of the plastic buckle (8) with limiting protrusions (79) facing each other. The outer peripheral surface of the sidewall (82) and near its end edge abuts against the end edge of the limiting protrusion (79).
7. A silent latch according to claim 2, characterized in that: There are two connecting pieces (3), which are symmetrically arranged on both sides of the handle (1) and the pin (2).
8. A silent latch according to claim 7, characterized in that: It also includes a spring (6) that remains in contact with the end of the handle (1) that is hinged to the latch panel (7).
9. A silent latch according to claim 8, characterized in that: The cavity (71) is provided with a first limiting part (75) and a second limiting part (76), and the spring piece (6) is embedded in the space enclosed by the first limiting part (75) and the second limiting part (76).
10. A silent latch according to claim 9, characterized in that: The spring piece (6) has an arched structure, with its highest point (6c) abutting against the handle (1), and its two ends contacting or abutting against the first limiting part (75) and the second limiting part (76) respectively.