A silent door lock mechanism

Abstract

The utility model belongs to door lock technical field, concretely relates to a kind of soundless door lock mechanism, including door lock shell;Claw pedestal is set in door lock shell;Door lock dog, with claw pedestal moves up and down;When the sliding of the push rod of the lower part of door lock dog in the direction of up and down along oblique direction rail groove, the claw hook of the upper end of door lock dog moves in the direction of front and back;When unlocking state, claw pedestal is in the state of rising, press head and claw hook extend to the top opening outside door lock shell, push rod moves to the upper end of oblique direction rail groove, claw hook retracts card claw mounting groove backwards;Locking state is reversed movement.The door lock dog in the scheme is guided by oblique direction rail groove, violent collision does not occur between each component, reduce the noise when door lock structure is used;In addition, since limiting and constraint are realized by rail groove structure, the stability when door lock structure is used can be higher, avoid the component damage problem produced by expansion, improve the service life of door lock structure.

Description

Technical Field

[0001] This utility model belongs to the field of door lock technology, specifically relating to a silent door lock mechanism. Background Technology

[0002] Push-button door locks are widely used in wardrobe doors, drawers, sideboards, bookcases, bedside tables, and other furniture, making the home environment more beautiful and convenient. Their working principle is as follows: when a specific part of the lock surface is pressed, the unlocking mechanism transmits pressure to the bolt through a mechanical transmission structure or electronic sensing element, causing the bolt to retract and unlock; after release, the return spring drives the bolt to pop out and return to its original position, completing the locking process.

[0003] However, existing push-button door locks often experience violent rebound of the return spring during unlocking, resulting in significant vibration and noise. This not only affects the lifespan of the lock but also causes inconvenience due to the noise. Therefore, it is necessary to design a silent door lock mechanism that can reduce noise. Utility Model Content

[0004] To address the aforementioned problems in existing technologies, this solution provides a silent door lock mechanism.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A silent door lock mechanism, comprising:

[0007] A door lock housing, wherein an inclined rail groove is provided on the side wall of the door lock housing;

[0008] The claw base is height-adjustable and installed inside the door lock housing; the top of the claw base has a pressing head;

[0009] The door lock claw is set in the claw mounting groove on the upper part of the claw base and moves up and down with the claw base; the convex shaft in the middle of the door lock claw is rotatably connected to the claw base, and the lever on the claw handle at the lower part of the door lock claw extends into the inclined rail groove; when the lever slides up and down along the inclined rail groove, the claw hook at the upper end of the door lock claw moves back and forth.

[0010] When unlocked, the claw seat is raised, the pressing head and claw hook extend out of the top opening of the door lock housing, the lever moves to the upper end of the inclined rail groove, and the claw hook retracts back into the claw mounting groove.

[0011] When locked, the claw seat is in the lowered position, the pressing head and claw hook retract into the top opening of the door lock housing, the lever moves to the lower end of the inclined rail groove, and the claw hook extends forward out of the claw mounting groove.

[0012] As an alternative or supplement to the above structure: a U-shaped retaining ring is rotatably connected to the inner bottom of the door lock housing, and retaining ring heads are provided at both ends of the U-shaped retaining ring with the two retaining ring heads facing each other;

[0013] The claw seat has annular grooves on its opposite sides, and the snap ring head extends into the corresponding annular grooves. The annular grooves include two V-shaped areas, namely the first V-shaped area and the second V-shaped area. When the claw seat is raised or lowered once, the snap ring head slides along the annular groove under the guidance of the groove wall, and switches positions between the two V-shaped areas. When the snap ring head moves to the first V-shaped area (35a), the door lock housing limits the claw seat and compresses the spring to keep the claw seat in the raised state. When the snap ring head hooks the claw seat in the second V-shaped area, it keeps the claw seat in the lowered state.

[0014] As an alternative or supplement to the above structure: the annular rail groove includes multiple rail sections, some of which are parallel to the lifting direction of the claw seat, while the remaining rail sections are inclined to the lifting direction of the claw seat; the sidewalls of the inclined rail sections form inclined surfaces that guide the snap ring head to drive the U-shaped snap ring to rotate.

[0015] As an alternative or supplement to the above structure: the annular rail groove includes a first rail segment, a second rail segment, a third rail segment, a fourth rail segment, a fifth rail segment, and a sixth rail segment connected in sequence; the first rail segment, the third rail segment, and the fifth rail segment are parallel to the lifting direction of the claw seat, and the second rail segment, the fourth rail segment, and the sixth rail segment are inclined to the lifting direction of the claw seat; when the claw seat descends, the snap ring head rises relative to the annular rail groove and moves along the first rail segment, the second rail segment, the third rail segment, the fourth rail segment, and the fifth rail segment to the apex of the fifth rail segment; when the claw seat rises, the snap ring head descends relative to the annular rail groove and moves along the fifth rail segment and the sixth rail segment to the bottom point of the sixth rail segment; thus switching the snap ring head from the first V-shaped area to the second V-shaped area.

[0016] As an alternative or supplement to the above structure: the annular rail groove includes a seventh rail segment, an eighth rail segment, a ninth rail segment, and a tenth rail segment connected in sequence. The bottom point of the seventh rail segment connects with the sixth rail segment to form a second V-shaped area, and the bottom point of the tenth rail segment connects with the first rail segment to form a first V-shaped area. The seventh and ninth rail segments are parallel to the lifting direction of the claw seat, while the eighth and tenth rail segments are inclined to the lifting direction of the claw seat. When the claw seat descends, the snap ring head rises relative to the annular rail groove and moves along the seventh and eighth rail segments to the apex of the ninth rail segment. When the claw seat rises, the snap ring head descends relative to the annular rail groove and moves along the ninth and tenth rail segments to the bottom point of the first rail segment, thus switching the snap ring head from the second V-shaped area to the first V-shaped area.

[0017] As an alternative or supplement to the above structure: a compression spring is provided between the door lock claw and the door lock housing, and the elastic force of the compression spring is used to push the door lock claw and claw seat to rise; the upper end of the compression spring abuts against the spring limit head in the middle of the claw hook, and the lower end abuts against the inner bottom of the door lock housing.

[0018] As an alternative or supplement to the above structure: the spring limiting head is hemispherical to facilitate the front and rear rotation of the door lock claw; a clearance groove is provided at the lower part of the door lock claw, the clearance groove is located below the spring limiting head and is used to accommodate the compression spring.

[0019] As an alternative or supplement to the above structure: a tubular part is provided on the lower rear side of the claw seat, the door lock claw is installed above the tubular part, and the compression spring is connected inside the tubular part to facilitate the straightening of the compression spring.

[0020] As an alternative or supplement to the above structure: a limiting back rib is provided on the rear side of the claw seat, and a limiting groove is provided on the rear side wall of the door lock housing to slide with the limiting back rib; limiting transverse ribs are provided on the left and right sides of the claw seat, and the limiting transverse ribs abut against the inner side of the door lock housing.

[0021] As an alternative or supplement to the above structure: the pressing head is located on the top rear side of the claw seat, and has a locking groove on the top front side of the claw seat. The fastener that cooperates with the silent door lock mechanism can be placed in the locking groove and connected to the door lock claw hook.

[0022] The beneficial effects of this utility model are as follows: When the door lock claws in this solution are locked or unlocked, they are guided by the inclined rail groove, and there will be no violent collision between the various components, thereby effectively reducing the noise of the door lock structure during use, and even achieving a noiseless effect that can be heard. In addition, since the limit and constraint are achieved through the rail groove structure, the stability of the door lock structure during use is higher, avoiding component damage caused by expansion and improving the service life of the door lock structure. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is an exploded structural diagram of the silent door lock mechanism in this scheme;

[0025] Figure 2 This is a cross-sectional structural diagram of the silent door lock mechanism in this solution when it is unlocked;

[0026] Figure 3 This is a cross-sectional structural diagram of the silent door lock mechanism in this solution when it is locked.

[0027] Figure 4 It is a structural diagram showing the assembly of the door lock claw, claw seat, U-shaped retaining ring, and compression spring;

[0028] Figure 5 This is a structural diagram of the door lock casing;

[0029] Figure 6This is a diagram of the internal structure of the door lock casing;

[0030] Figure 7 This is a schematic diagram of the door lock claw structure;

[0031] Figure 8 This is a schematic diagram of the claw-shaped base;

[0032] Figure 9 This is a side view of the claw-shaped base;

[0033] Figure 10 This is a schematic diagram of the annular guide groove.

[0034] In the diagram: 1-Door lock housing; 11-Housing cavity; 12-Latch; 13-Angled rail groove; 14-Limiting groove; 15-Spring limiting post; 16-Block plate; 2-Door lock claw; 21-Claw hook; 22-Protruding shaft; 23-Spring limiting head; 24-Claw handle; 25-Allowing groove; 26-Lever; 3-Claw seat; 31-Pressing head; 32-Shaft hole; 33-Claw mounting groove; 34-Connecting handle; 35-Annular rail groove; 35a-First V-shaped area; 35b-Second V-shaped area; 351-First rail section; 35 2-Second track section; 352a-Second inclined plane; 353-Third track section; 354-Fourth track section; 354a-Fourth inclined plane; 355-Fifth track section; 356-Sixth track section; 356a-Sixth inclined plane; 357-Seventh track section; 358-Eighth track section; 358-Eighth inclined plane; 359-Ninth track section; 3510-Tenth track section; 3510a-Tenth inclined plane; 36-Limiting transverse rib; 37-Tubular part; 38-Limiting back rib; 4-U-shaped retaining ring; 41-Retaining ring head; 5-Compression spring. Detailed Implementation

[0035] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this solution without creative effort are within the protection scope of this solution.

[0036] Example

[0037] like Figures 1 to 10 As shown, this embodiment designs a silent door lock mechanism, including a door lock housing 1, a claw base 3, a door lock claw 2, a compression spring 5, a U-shaped retaining spring 4, and other components.

[0038] The compression spring 5 can be any existing metal spring, which will not be described in detail here.

[0039] The U-shaped retaining spring 4 is a U-shaped structure made of metal or other hard materials. Each end of the U-shaped retaining spring 4 has a retaining spring head 41, with the two retaining spring heads 41 facing each other. In use, the U-shaped retaining spring 4 is rotatably connected to the inner bottom of the door lock housing 1 and can hook onto the claw seat 3 via the retaining spring heads 41.

[0040] The door lock housing 1 is a barrel-shaped structure with a top opening. Two baffle plates 16 are provided on the front side of the inner bottom of the door lock housing 1. When the lower part of the U-shaped retaining spring 4 is rotatably connected to the front side of the inner bottom of the door lock housing 1, the baffle plates 16 can limit the U-shaped retaining spring 4, thereby preventing the U-shaped retaining spring 4 from moving left or right. A spring limiting post 15 is provided on the front side of the inner bottom of the door lock housing 1. The lower end of the compression spring 5 can be inserted through the spring limiting post 15, thereby preventing the lower end of the compression spring 5 from being misaligned. Angled rail grooves 13 are provided on the side walls on both the left and right sides of the door lock housing 1. The upper end of the angled rail groove 13 is closer to the front side of the door lock housing 1 than the lower end. A limiting groove 14 is provided on the rear side wall of the door lock housing 1. The limiting groove 14 can slide and engage with the limiting back rib 38 provided on the rear side of the claw seat 3. When the claw seat 3 is raised, the limiting back rib 38 abuts against the upper end of the limiting groove 14, thereby limiting the claw seat 3. Elastic protrusions are provided on the upper left and right sides of the door lock housing 1. The elastic protrusions extend to the upper outer side of the door lock housing 1. When the door lock housing 1 is installed on furniture, the elastic protrusions can abut against the edge of the installation opening, thereby preventing the door lock housing 1 from falling off the furniture.

[0041] The claw base 3 is a block-shaped structure, and it is vertically and retractably mounted inside the door lock housing 1. The top of the claw base 3 has a pressing head 31, which can be manually pressed to apply a downward force to the claw base 3 during locking and unlocking. The pressing head 31 is located on the rear top side of the claw base 3, and a latching groove is located on the front top side of the claw base 3. A fastener that cooperates with the silent door lock mechanism can be placed in the latching groove and hooked together with the door lock claw 2.

[0042] The lower front side of the claw seat 3 is a connecting handle 34. Annular grooves 35 are respectively provided on the side surfaces of the connecting handle 34 on both sides (i.e., the left and right sides). The two snap ring heads 41 of the U-shaped snap ring 4 extend into the corresponding annular grooves 35. The annular groove 35 includes two V-shaped areas, namely the first V-shaped area 35a and the second V-shaped area 35b. When the claw seat 3 is raised or lowered once, the snap ring heads 41 slide along the annular groove 35 under the guidance of the groove wall, switching positions between the two V-shaped areas. When the snap ring heads 41 move to the first V-shaped area 35a, the door lock housing 1 limits the claw seat 3, and the spring force of the compression spring 5 keeps the claw seat 3 in a raised state. When the snap ring heads 41 hook the claw seat 3 at the second V-shaped area 35b, the claw seat 3 remains in a lowered state.

[0043] A tubular portion 37 is provided on the top rear side of the claw base 3. The door lock claw 2 is installed above the tubular portion 37, and the compression spring 5 is connected inside the tubular portion 37 to facilitate the straightening of the compression spring 5. A limiting back rib 38 is provided on the side wall of the rear side of the tubular portion 37. The limiting back rib 38 is provided on the rear side of the claw base 3 and slides in cooperation with the limiting groove 14 provided on the rear side wall of the door lock housing 1. Limiting transverse ribs 36 are provided on the left and right sides of the tubular portion 37 of the claw base 3. The limiting transverse ribs 36 abut against the inner side arm of the door lock housing 1 to prevent the claw base 3 from swinging left and right during the lifting and lowering process.

[0044] The door lock claw 2 is mounted in the claw mounting groove 33 on the upper part of the rotatable claw base 3. When the claw base 3 moves up and down, the door lock claw 2 can move up and down with the claw base 3. A convex shaft 22 is provided on both the left and right sides of the middle part of the door lock claw 2. The convex shaft 22 is rotatably connected to the claw base 3, allowing the door lock claw 2 to rotate around the door lock claw 2 as an axis. A claw handle 24 is provided on both the left and right sides of the lower part of the door lock claw 2. Each claw handle 24 has a lever 26 at its lower end, with the two levers 26 being far apart from each other. In use, the two levers 26 extend into the corresponding inclined rail groove 13 to drive the door lock claw 2 to rotate back and forth. When the lever 26 slides up and down along the inclined rail groove 13, the claw hook 21 at the upper end of the door lock claw 2 moves back and forth.

[0045] A compression spring 5 is disposed between the door lock claw 2 and the door lock housing 1. The elastic force of the compression spring 5 is used to push the door lock claw 2 and the claw seat 3 upward. The upper end of the compression spring 5 abuts against the spring limiting head 23 in the middle of the claw hook 21, and the lower end abuts against the inner bottom of the door lock housing 1. The spring limiting head 23 is hemispherical to facilitate the front and back rotation of the door lock claw 2. A clearance groove 25 is provided at the lower part of the door lock claw 2. The clearance groove 25 is located below the spring limiting head 23 and between the two claw handles 24. The clearance groove 25 can accommodate the compression spring 5 so that the upper end of the compression spring 5 abuts against the spring limiting head 23. The spring limiting head 23 is hemispherical so that when the upper end of the compression spring 5 abuts against the spring limiting head 23, there is no mutual misalignment and the front and back rotation of the door lock claw 2 is not affected.

[0046] The annular rail grooves 35 on both sides of the claw seat 3 are mirror images of each other, and each annular rail groove 35 includes multiple rail segments. Some rail segments are parallel to the lifting direction of the claw seat 3, while the remaining rail segments are inclined to the lifting direction of the claw seat 3. The sidewalls of the inclined rail segments form inclined surfaces that guide the snap ring head 41 to drive the U-shaped snap ring 4 to rotate.

[0047] Specifically: the annular rail groove 35 includes a first rail segment 351, a second rail segment 352, a third rail segment 353, a fourth rail segment 354, a fifth rail segment 355, and a sixth rail segment 356 connected in sequence; the first rail segment 351, the third rail segment 353, and the fifth rail segment 355 are parallel to the lifting direction of the claw seat 3, while the second rail segment 352, the fourth rail segment 354, and the sixth rail segment 356 are inclined to the lifting direction of the claw seat 3; when the claw seat 3 descends, the snap ring head 4... The pawl seat 3 rises relative to the annular groove 35 and moves along the first track segment 351, the second track segment 352, the third track segment 353, the fourth track segment 354, and the fifth track segment 355 to the apex of the fifth track segment 355. As the pawl seat 3 rises, the snap ring head 41 descends relative to the annular groove 35 and moves along the fifth track segment 355 and the sixth track segment 356 to the bottom of the sixth track segment 356, thus switching the snap ring head 41 from the first V-shaped area 35a to the second V-shaped area 35b. During this process, the second inclined surface 352a of the second track segment 352, the fourth inclined surface 354a of the fourth track segment 354, and the sixth inclined surface 356a of the sixth track segment 356 obliquely guide the snap ring head 41, causing the U-shaped snap ring 4 to rotate in the front-back direction.

[0048] When the snap ring head 41 moves to the second V-shaped area 35b, the snap ring head 41 can hook onto the side wall of the second V-shaped area 35b, so that the silent door lock mechanism remains locked. The claw seat 3 is in the lowered state, the pressing head 31 and the claw hook 21 retract into the top opening of the door lock housing 1, the lever 26 moves to the lower end of the inclined rail groove 13, and the claw hook 21 extends forward into the claw mounting groove 33 and enters the lock slot to hook the fastener, thereby achieving locking.

[0049] The annular track groove 35 further includes a seventh track segment 357, an eighth track segment 358, a ninth track segment 359, and a tenth track segment 3510 connected in sequence. The bottom point of the seventh track segment 357 connects with the sixth track segment 356 to form a second V-shaped area 35b, and the bottom point of the tenth track segment 3510 connects with the first track segment 351 to form a first V-shaped area 35a. The seventh track segment 357 and the ninth track segment 359 are parallel to the lifting direction of the claw seat 3, and the eighth track segment 358 and the tenth track segment 3510 are parallel to the lifting direction of the claw seat 3. 3510 is inclined in the lifting direction of the claw seat 3; when the claw seat 3 descends, the snap ring head 41 rises relative to the annular rail groove 35 and moves along the seventh rail segment 357 and the eighth rail segment 358 to the apex of the ninth rail segment 359; when the claw seat 3 rises, the snap ring head 41 descends relative to the annular rail groove 35 and moves along the ninth rail segment 359 and the tenth rail segment 3510 to the bottom point of the first rail segment 351; causing the snap ring head 41 to switch from the second V-shaped area 35b to the first V-shaped area 35a. During this process, the eighth inclined surface 358 of the eighth rail segment 358 and the tenth inclined surface 3510a of the tenth rail segment 3510 obliquely guide the snap ring head 41, causing the U-shaped snap ring 4 to rotate in the front-back direction.

[0050] When the snap ring head 41 moves to the first V-shaped area 35a, the limiting back rib 38 abuts against the upper end of the limiting groove 14, thereby using the door lock housing 1 to limit the claw seat 3 and achieve the limitation of the claw seat 3, so that the silent door lock mechanism remains in the unlocked state, the claw seat 3 is in the raised but not rising state, the pressing head 31 and the claw hook 21 extend upward into the top opening of the door lock housing 1, the lever 26 moves to the upper end of the inclined rail groove 13, and the claw hook 21 retracts backward into the claw mounting groove 33, and exits the lock slot and disengages from the fastener, thereby achieving unlocking.

[0051] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation; it is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the scope of this technology.

Claims

1. A silent door lock mechanism, characterized in that: include: Door lock housing (1), the side wall of which is provided with an inclined rail groove (13); The claw seat (3) is installed inside the door lock housing (1) in a height-adjustable manner; the top of the claw seat (3) has a pressing head (31); The door lock claw (2) is set in the claw mounting groove (33) on the upper part of the claw base (3) and moves up and down with the claw base (3); the convex shaft (22) in the middle of the door lock claw (2) is rotatably connected to the claw base (3); the lever (26) on the claw handle (24) at the lower part of the door lock claw (2) extends into the inclined rail groove (13); when the lever (26) slides up and down along the inclined rail groove (13), the claw hook (21) at the upper end of the door lock claw (2) moves back and forth. When unlocked, the claw seat (3) is in the raised state, the pressing head (31) and the claw hook (21) extend out of the top opening of the door lock housing (1), the lever (26) moves to the upper end of the inclined rail groove (13), and the claw hook (21) retracts back into the claw mounting groove (33). When locked, the claw seat (3) is in the lowered state, the pressing head (31) and the claw hook (21) retract into the top opening of the door lock housing (1), the lever (26) moves to the lower end of the inclined rail groove (13), and the claw hook (21) extends forward out of the claw mounting groove (33).

2. The silent door lock mechanism according to claim 1, characterized in that: The bottom of the door lock housing (1) is rotatably connected to a U-shaped retaining ring (4), and both ends of the U-shaped retaining ring (4) are provided with retaining ring heads (41), with the two retaining ring heads (41) facing each other; The claw seat (3) has annular grooves (35) on its opposite sides, and the snap ring head (41) extends into the annular groove (35). The annular groove (35) includes two V-shaped areas, namely the first V-shaped area (35a) and the second V-shaped area (35b). When the claw seat (3) is raised or lowered once, the snap ring head (41) slides along the annular groove (35) under the guidance of the groove wall of the annular groove (35) and switches its position once between the two V-shaped areas. When the snap ring head (41) moves to the first V-shaped area (35a), the door lock housing (1) limits the claw seat (3), and the compression spring (5) keeps the claw seat (3) in the raised state. When the snap ring head (41) hooks the claw seat (3) at the second V-shaped area (35b), the claw seat (3) is kept in the lowered state.

3. The silent door lock mechanism according to claim 2, characterized in that: The annular rail groove (35) includes multiple rail sections, some of which are parallel to the lifting direction of the claw seat (3), while the remaining rail sections are inclined to the lifting direction of the claw seat (3). The sidewalls of the inclined rail sections form inclined surfaces that guide the snap ring head (41) to drive the U-shaped snap ring (4) to rotate.

4. The silent door lock mechanism according to claim 3, characterized in that: The annular track groove (35) includes a first track segment (351), a second track segment (352), a third track segment (353), a fourth track segment (354), a fifth track segment (355), and a sixth track segment (356) connected in sequence; the first track segment (351), the third track segment (353), and the fifth track segment (355) are parallel to the lifting direction of the claw seat (3), while the second track segment (352), the fourth track segment (354), and the sixth track segment (356) are inclined to the lifting direction of the claw seat (3); when the claw seat (3) descends, the snap ring head (41) The ring rail (3) rises relative to the annular groove (35) and moves along the first track segment (351), the second track segment (352), the third track segment (353), the fourth track segment (354), and the fifth track segment (355) to the apex of the fifth track segment (355); when the claw seat (3) rises, the snap ring head (41) descends relative to the annular groove (35) and moves along the fifth track segment (355) and the sixth track segment (356) to the bottom of the sixth track segment (356); thus switching the snap ring head (41) from the first V-shaped area (35a) to the second V-shaped area (35b).

5. The silent door lock mechanism according to claim 3, characterized in that: The annular track groove (35) includes a seventh track segment (357), an eighth track segment (358), a ninth track segment (359), and a tenth track segment (3510) connected in sequence. The bottom point of the seventh track segment (357) connects with the sixth track segment (356) to form a second V-shaped area (35b), and the bottom point of the tenth track segment (3510) connects with the first track segment (351) to form a first V-shaped area (35a). The seventh track segment (357) and the ninth track segment (359) are parallel to the lifting direction of the claw seat (3), and the eighth track segment (358) and the tenth track segment (3510) are parallel to the lifting direction of the claw seat (3). 510) Inclined in the lifting direction of the claw seat (3); when the claw seat (3) descends, the snap ring head (41) rises relative to the annular rail groove (35) and moves along the seventh rail segment (357) and the eighth rail segment (358) to the top of the ninth rail segment (359); when the claw seat (3) rises, the snap ring head (41) descends relative to the annular rail groove (35) and moves along the ninth rail segment (359) and the tenth rail segment (3510) to the bottom of the first rail segment (351); so that the snap ring head (41) switches from the second V-shaped area (35b) to the first V-shaped area (35a).

6. The silent door lock mechanism according to any one of claims 1-5, characterized in that: A compression spring (5) is provided between the door lock claw (2) and the door lock housing (1). The elastic force of the compression spring (5) is used to push the door lock claw (2) and the claw seat (3) to rise. The upper end of the compression spring (5) abuts against the spring limit head (23) in the middle of the claw hook (21), and the lower end abuts against the inner bottom of the door lock housing (1).

7. The silent door lock mechanism according to claim 6, characterized in that: The spring limiting head (23) is hemispherical to facilitate the front and back rotation of the door lock claw (2); a clearance groove (25) is provided at the lower part of the door lock claw (2), the clearance groove (25) is located below the spring limiting head (23) and is used to accommodate the compression spring (5).

8. The silent door lock mechanism according to claim 6, characterized in that: A tubular portion (37) is provided on the lower rear side of the claw seat (3), the door lock claw (2) is installed above the tubular portion (37), and the compression spring (5) is connected inside the tubular portion (37) to facilitate the straightening of the compression spring (5).

9. The silent door lock mechanism according to any one of claims 1-5, characterized in that: The claw seat (3) is provided with a limiting back rib (38) on its rear side. The door lock housing (1) is provided with a limiting groove (14) that slides with the limiting back rib (38). When the claw seat (3) is raised, the limiting back rib (38) abuts against the upper end of the limiting groove (14) and limits the claw seat (3). Limiting transverse ribs (36) are provided on the left and right sides of the claw seat (3). The limiting transverse ribs (36) abut against the inner side of the door lock housing (1).

10. The silent door lock mechanism according to any one of claims 1-5, characterized in that: The pressing head (31) is located on the top rear side of the claw seat (3), and has a locking groove on the top front side of the claw seat (3). The fastener that cooperates with the silent door lock mechanism can be placed in the locking groove and hooked to the door lock claw (2).

Images