Sliding door top lock mechanism

Abstract

The utility model discloses a top lock mechanism of a sliding door, which comprises a lock box, a top lock, a top lock, a top lock, a top lock, a top lock, a top lock, a top lock, a top lock and a top lock, and the lock box comprises a lock box assembly part and a lock groove; the vertical frame is provided with a sliding rail in the length direction of the vertical frame, and the vertical frame is used for being assembled with the side edge of the door body; the lock rod is arranged in the sliding rail in a sliding mode, one end of the lock rod is used for being connected with the lock groove in a matched and inserted mode, and the other end of the lock rod is in linkage with a handle of a door body so that the lock rod can stretch into or be separated from the lock groove. The lock rod is provided with at least one adjusting piece used for adjusting the length of the lock rod. According to the utility model, the spring bolt is ensured to be positioned on the upper side of the door body, so that the problems of visual impairment and collision caused by protrusion of the spring bolt are avoided; at least one adjusting piece used for adjusting the length of the lock rod is arranged on the lock rod, a user can adjust the effective length of the lock rod according to the actual situation, it is ensured that the lock rod can be locked with the upper rails of different distances, and the locking requirements between sliding doors of different models and positions and the upper rails are met.

Description

Technical Field

[0001] This utility model relates to the technical field of sliding door locking structures, and in particular to a sliding door top lock mechanism. Background Technology

[0002] In modern architectural design, sliding doors are widely used in homes, offices, shopping malls, and other places due to their space-saving, easy-to-operate, and aesthetically pleasing features. However, traditional sliding door lock designs are mostly located on the side of the door. This design not only causes the lock tongue to protrude from the side wall of the door, creating a visual disharmony, but may also cause users to bump and get injured during daily use, especially in narrow or high-traffic spaces, where this problem is particularly prominent.

[0003] To address the aforementioned issues, an innovative top-lock structure has emerged in the prior art. This structure moves the bolt position from the side of the door to the top, allowing the bolt to lock against the track on the upper door frame via the handle, thus achieving the locking function of the sliding door. This design not only avoids visual obstruction and safety hazards caused by a protruding bolt but also improves the overall aesthetics and ease of use.

[0004] However, in practical applications, the top-lock mechanism also faces a series of challenges. Because the distance between the door frame track and the latch may vary depending on the door model, size, and installation location, the length of the locking rod in traditional top-lock mechanisms is often fixed. This leads to problems where the locking rod is insufficient in length when assembling sliding doors of different models or in different locations, failing to effectively lock with the upper door frame track. This not only affects the stability and security of the sliding door but also increases the difficulty and cost of installation and adjustment. Utility Model Content

[0005] To overcome at least one of the defects described in the prior art, this utility model provides a sliding door top lock mechanism. This solves the problem of fixing the length of the lock rod.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A sliding door top lock mechanism includes: a lock box, the lock box including a lock box assembly part and a lock groove, the lock box assembly part being used for assembly with an upper track; a vertical frame, the vertical frame having a slide rail along its length, the vertical frame being used for assembly with the side of the door body; a lock rod, the lock rod being slidably disposed within the slide rail, one end being used for fitting and inserting into the lock groove, and the other end being linked with the door handle to allow the lock rod to extend into or disengage from the lock groove; wherein, the lock rod is provided with at least one adjusting element for adjusting the length of the lock rod.

[0008] By adopting the above solution, it is ensured that the latch is located on the upper side of the door, avoiding visual obstruction and bumping problems caused by the protruding latch; the lock bar is equipped with at least one adjustment piece for adjusting the length of the lock bar, so that users can adjust the effective length of the lock bar according to the actual situation, ensuring that the lock bar can lock with the upper track at different distances, and adapting to the locking requirements between the sliding door and the upper track of different models and positions.

[0009] Furthermore, the locking rod includes: a locking member, one end of which is adapted to be inserted into the locking groove; a linkage rod, one end of which is connected to the other end of the locking member, and the other end is linked to the handle; an adjusting member is disposed between the locking member and the linkage rod, and / or the adjusting member is disposed between the linkage rod and the handle.

[0010] By adopting the above scheme, the locking bar is subdivided into a locking component and a linkage rod, making the connection between the bolt and the handle more flexible. At the same time, the adjusting component can be set between the locking component and the linkage rod or between the linkage rod and the handle, providing more adjustment possibilities and further enhancing the adaptability of the locking bar length and the convenience of adjustment.

[0011] Furthermore, the locking member and / or the handle are provided with a first adjustment portion for engaging with the adjusting member, and the adjusting member is provided with a second adjustment portion corresponding to the first adjustment portion. The first adjustment portion and the second adjustment portion have at least two replaceable engagement positions in the vertical direction.

[0012] By adopting the above solution, the snap-fit ​​design of the first and second adjustment parts, and their at least two replaceable snap-fit ​​positions in the vertical direction, allows users to easily adjust the effective length of the locking rod according to the actual distance between the sliding door and the upper track, without having to replace the entire locking rod or perform complex adjustment operations.

[0013] Furthermore, in the first adjustment part and the second adjustment part, one is an outwardly protruding snap-fit ​​strip, and the snap-fit ​​strip is provided with at least one set of snap teeth on both sides; the other is an inwardly recessed snap-fit ​​opening, and the snap-fit ​​opening is provided with at least two sets of tooth grooves on both sides corresponding to the snap teeth, and the snap teeth are adapted to snap-fit ​​with the tooth grooves.

[0014] By adopting the above solution and using the matching snap-fit ​​design of the snap-fit ​​teeth and grooves, a stable connection between the adjusting part and the locking part or handle is ensured.

[0015] Furthermore, an auxiliary alignment block is provided on the side of the snap-fit ​​strip facing the door body. The projection of the auxiliary alignment block on the snap-fit ​​strip does not exceed the area of ​​the connection surface between the snap-fit ​​strip and the auxiliary alignment block. Moreover, the farther the auxiliary alignment block is from the snap-fit ​​strip, the smaller the projected area of ​​its cross-section on the snap-fit ​​strip.

[0016] By adopting the above solution, users can more easily align the locking teeth and grooves when adjusting the lock rod length, improving the accuracy and convenience of adjustment. Meanwhile, the gradually decreasing cross-sectional projection area of ​​the auxiliary alignment block ensures effective alignment guidance without interfering with the engagement of the locking teeth and grooves.

[0017] Furthermore, the snap-fit ​​strip is provided with a snap-fit ​​strip reinforcing rib on the side facing the door body.

[0018] By adopting the above solution, the strength and stability of the locking strip are enhanced, ensuring a secure connection between the locking teeth and the grooves, and improving the overall durability of the locking bar.

[0019] Furthermore, at least one end of the linkage rod is provided with a first assembly part, and the adjusting member is provided with a second assembly part corresponding to the first assembly part, and the first assembly part and the second assembly part are fixedly connected.

[0020] By adopting the above solution, a stable connection between the linkage rod and the adjusting component is ensured, avoiding the problem of locking rod failure caused by loose connection.

[0021] Furthermore, in the first assembly part and the second assembly part, one is a protruding locking block and the other is a concave locking groove, and the locking block engages with the locking groove.

[0022] By adopting the above solution, the connection structure between the linkage rod and the adjusting component is simplified, and the convenience and stability of the connection are improved.

[0023] Furthermore, the linkage rod is provided with linkage rod reinforcing ribs.

[0024] By adopting the above solution, the strength and stability of the linkage rod are enhanced, and the durability and reliability of the locking rod during long-term use are improved.

[0025] Furthermore, the adjusting member is provided with flaps on both sides for sliding along the slide rail, and the inner side of the flaps is provided with locking ribs for preventing the flaps from disengaging from the slide rail.

[0026] By adopting the above solution, it is ensured that the adjusting component can slide securely along the slide rail, avoiding the problem of locking rod failure caused by the adjusting component falling off. At the same time, the design of the locking rib provides additional safety protection, ensuring the stability of the locking rod in the locked state.

[0027] In summary, the sliding door top lock mechanism provided by this utility model has the following technical effects:

[0028] 1. By moving the latch from the side of the door to the top, the visual obstruction caused by a protruding latch is avoided, making the sliding door design simpler and more aesthetically pleasing. At the same time, this design reduces the risk of bumps and injuries to users due to a protruding latch during daily use, especially in narrow or high-traffic spaces, significantly improving safety.

[0029] 2. At least one adjusting element is provided on the locking rod, allowing users to easily adjust the effective length of the locking rod according to the actual distance between the sliding door and the upper track. This design solves the compatibility problem caused by the fixed length of the locking rod in traditional top-lock mechanisms, enabling the top-lock mechanism to adapt to sliding doors of different models, sizes, and installation positions, thus improving the product's versatility and market competitiveness.

[0030] 3. Due to the adjustable length of the locking rod, installers do not need to frequently change locking rods of different lengths when assembling different models of sliding doors, thus simplifying the installation process and reducing debugging difficulty and costs. This not only improves installation efficiency but also reduces rework and repair costs caused by mismatched locking rod lengths;

[0031] 4. By precisely adjusting the length of the locking rod, a tight lock is ensured between the rod and the upper track, thus improving the stability and safety of the sliding door. This design makes the sliding door less prone to loosening or falling off during long-term use, extending the product's lifespan. Attached Figure Description

[0032] Figure 1 This is a partial disassembly diagram of the sliding door according to an embodiment of the present utility model;

[0033] Figure 2 This is a three-dimensional structural diagram of the locking mechanism according to an embodiment of the present utility model;

[0034] Figure 3 for Figure 2 Enlarged view of area A in the middle;

[0035] Figure 4 This is an exploded structural diagram of the locking mechanism according to an embodiment of the present utility model;

[0036] Figure 5 for Figure 4 Enlarged view of area B in the middle;

[0037] Figure 6 This is an exploded structural diagram of the locking mechanism according to an embodiment of the present utility model;

[0038] Figure 7 This is a schematic diagram of the adjusting component structure according to an embodiment of the present utility model.

[0039] The meanings of the reference numerals in the attached drawings are as follows: 1. Lock box; 11. Lock box assembly; 12. Lock groove; 2. Upper rail; 3. Vertical frame; 31. Slide rail; 4. Locking rod; 41. Locking component; 411. Bay; 412. Tooth groove; 413. Lock tongue; 42. Linkage rod; 421. Locking block; 422. Linkage rod reinforcing rib; 5. Adjusting component; 51. Locking strip; 511. Locking tooth; 512. Auxiliary alignment block; 513. Locking strip reinforcing rib; 52. Locking groove; 53. Flip plate; 54. Locking rib; 6. Handle; 61. Handle sliding component; 62. Handle linkage component; 63. Handle driving component; 7. Guide block; 71. Guide hole. Detailed Implementation

[0040] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0041] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0042] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0044] See Embodiment 1 of this utility model. Figures 1-7As shown, a sliding door top lock mechanism is disclosed, including a lock box 1, a vertical frame 3, a locking rod 4, and an adjusting component 5. The lock box 1 includes a lock box assembly part 11 and a lock groove 12. Specifically, the lock box assembly part 11 is fixedly connected to the upper track 2 by bolts or screws. The lock groove 12 is located on the lock box 1 and faces the locking rod 4. The vertical frame 3 is located on the side of the door body, and the two are connected by, but not limited to, snap-fit ​​or bolt connection. The vertical frame 3 is provided with a slide rail 31 along its length direction. The locking rod 4 is slidably disposed in the slide rail 31, and one end is used to fit and insert into the lock groove 12, and the other end is linked with the door handle 6 to allow the locking rod 4 to extend into or disengage from the lock groove 12. At least one adjusting component 5 is provided on the locking rod 4 for adjusting the length of the locking rod 4. This design ensures that the latch 413 is located on the upper side of the door, avoiding visual obstruction and bumping problems caused by the protruding latch 413; the locking bar 4 is equipped with at least one adjusting piece 5 for adjusting the length of the locking bar 4, so that the user can adjust the effective length of the locking bar 4 according to the actual situation, ensuring that the locking bar 4 can lock with the upper track 2 at different distances, and adapting to the locking requirements between the sliding door and the upper track 2 of different models and positions.

[0045] To facilitate the assembly of the adjusting member 5, in some embodiments, the locking rod 4 includes a locking member 41 and a linkage rod 42. One end of the locking member 41 is adapted to be inserted into the lock groove 12, and one end of the linkage rod 42 is connected to the other end of the locking member 41, while the other end is linked to the handle 6. The adjusting member 5 is disposed between the locking member 41 and the linkage rod 42, and / or, between the linkage rod 42 and the handle 6. Because the locking rod 4 is subdivided into the locking member 41 and the linkage rod 42, the connection between the latch 413 and the handle 6 becomes more flexible. Simultaneously, the adjusting member 5 can be disposed between the locking member 41 and the linkage rod 42, or between the linkage rod 42 and the handle 6, providing more adjustment possibilities and further enhancing the adaptability of the locking rod 4's length and the convenience of adjustment. In this embodiment 1, two adjusting members 5 are provided, located respectively between the locking member 41 and the linkage rod 42, and between the linkage rod 42 and the handle 6. In other embodiments, it can also be set in the middle of the linkage rod 42 or the middle of the locking member 41, as long as the adjustment effect can be achieved. This embodiment 1 does not make specific limitations.

[0046] Optionally, to improve the stable insertion effect between the locking member 41 and the locking groove 12, a locking tongue 413 is fitted to one end of the locking member 41. The shape of the locking tongue 413 can be adapted to the shape of the locking groove 12, thereby achieving a smooth insertion effect without affecting the strength and volume of the locking member 41 itself. Specifically, in this embodiment 1, the locking tongue 413 is sandwiched between the locking member 41 and the body, and the locking tongue 413 and the locking member 41 are locked together so that the two remain relatively stationary during longitudinal interaction.

[0047] In order to ensure that the part of the locking rod 4 extending above the door body is uncontrolled and unable to maintain its running track during the longitudinal sliding along the slide rail 31, in this embodiment 1, a guide block 7 is fixed to the upper side of the door body by bolts. The guide block 7 has a guide hole 71 that can provide guidance for the locking member 41 of the locking rod 4. The locking member 41 passes through the guide hole 71 to complete its own vertical movement.

[0048] In some embodiments, the locking member 41 and / or the handle 6 are provided with a first adjusting portion for engaging with the adjusting member 5, and the adjusting member 5 is provided with a second adjusting portion corresponding to the first adjusting portion. The first adjusting portion and the second adjusting portion have at least two replaceable engaging positions in the vertical direction. Preferably, one of the first adjusting portion and the second adjusting portion is an outwardly protruding engaging strip 51, with at least one set of teeth 511 on both sides of the engaging strip 51; the other is an inwardly recessed latch 411, with at least two sets of grooves 412 on both sides of the latch 411 corresponding to the teeth 511, and the teeth 511 and the grooves 412 are adapted to engage. In this embodiment 1, the other end of the locking member 41 is provided with a bayonet 411, and an adjusting member 5 is provided inside the bayonet 411. The adjusting member 5 is provided with a snap-fit ​​strip 51 that engages with the bayonet 411 of the locking member 41. The handle 6 includes a handle sliding member 61, a handle linkage member 62, and a handle driving member 63. The handle sliding member 61 is powered by manual drive from the user, which drives the handle linkage member 62 to provide driving force to the handle driving member 63, thereby ensuring the upward or downward thrust of the handle driving member 63 itself. The end of the handle driving member 63 facing the lock groove 12 is provided with a bayonet 411, and another adjusting member 5 is connected inside the bayonet 411. The snap-fit ​​strip 51 of the adjusting member 5 engages with the bayonet 411 on the handle driving member 63. By adopting the matching snap-fit ​​design of the snap teeth 511 and the tooth groove 412, a stable connection between the adjusting member 5 and the locking member 41 or the handle 6 is not only ensured.

[0049] It should be noted that the engagement direction of the locking strip 51 and the latch 411 is from the direction perpendicular to the door body. To improve the accuracy of their assembly alignment, in some embodiments, an auxiliary alignment block 512 is provided on the side of the locking strip 51 facing the door body. The projection of the auxiliary alignment block 512 on the locking strip 51 does not exceed the area of ​​the connecting surface between the locking strip 51 and the auxiliary alignment block 512. Furthermore, the farther the auxiliary alignment block 512 is from the locking strip 51, the smaller its cross-sectional projection area on the locking strip 51. This makes it easier for the user to align the locking teeth 511 and the tooth groove 412 when adjusting the length of the locking rod 4, improving the accuracy and convenience of adjustment. At the same time, the design of the gradually decreasing cross-sectional projection area of ​​the auxiliary alignment block 512 ensures that it provides effective alignment guidance without interfering with the engagement of the locking teeth 511 and the tooth groove 412.

[0050] It should be noted that, in order to enhance the strength of the locking strip 51 itself, in some embodiments, a locking strip reinforcing rib 513 is provided on the side of the locking strip 51 facing the door body. The locking strip reinforcing rib 513 includes, but is not limited to, horizontal ribs, longitudinal ribs, X-shaped ribs, cross ribs, star-shaped ribs, and triangular ribs. This enhances the strength and stability of the locking strip 51, ensures a secure connection between the locking teeth 511 and the tooth groove 412, and improves the overall durability of the locking rod 4.

[0051] In this embodiment 1, the auxiliary alignment block 512 is a triangular rib, which is low on both sides and high in the middle. The direction of the triangular rib is perpendicular to the direction of the snap-fit ​​strip 51, and the tip of the middle point faces the door body. When the snap-fit ​​strip 51 is snapped into the snap-fit ​​opening 411 from the side away from the door body, no precise alignment is required. The slopes on both sides of the triangular rib can slide directly into the snap, thereby achieving precise alignment between the snap-fit ​​strip 51 and the snap-fit ​​opening 411. At the same time, the snap-fit ​​strip 51 is provided with two longitudinal snap-fit ​​strip reinforcing ribs 513 on the side facing the door body. The snap-fit ​​strip reinforcing ribs 513 are perpendicular to the triangular rib. Preferably, the reinforcing ribs are provided with inclined surfaces aligned with the slopes on both sides of the triangular rib in the direction of the snap-fit ​​teeth 511 of the snap-fit ​​strip 51, so as to achieve the same effect as the slopes of the triangular rib.

[0052] It should be noted that in the assembly of the linkage rod 42, at least one end of the linkage rod 42 is provided with a first assembly part, and the adjusting member 5 is provided with a second assembly part corresponding to the first assembly part. The first assembly part and the second assembly part are fixedly connected, ensuring a stable connection between the linkage rod 42 and the adjusting member 5, and avoiding the problem of lock rod 4 failure due to loose connection. Optionally, the fixed connection between the first assembly part and the second assembly part includes, but is not limited to, snap-fit ​​or screw-fit. Preferably, taking snap-fit ​​as an example, one of the first assembly part and the second assembly part is an outwardly protruding snap block 421, and the other is an inwardly recessed snap groove 52. The snap block 421 and the snap groove 52 snap together, simplifying the connection structure between the linkage rod 42 and the adjusting member 5, and improving the convenience and stability of the connection. In this embodiment 1, the first assembly part is an outwardly protruding snap block 421, and the direction in which the snap block 421 protrudes is towards the vertical frame 3. The second assembly part is a snap groove 52 that snaps together with the snap block 421.

[0053] In some embodiments, the linkage rod 42 is further provided with a linkage rod reinforcing rib 422, which enhances the strength and stability of the linkage rod 42 and improves the durability and reliability of the locking rod 4 during long-term use.

[0054] In some embodiments, the adjusting member 5 is provided with flaps 53 on both sides for sliding along the slide rail 31. The flaps 53 can be adapted to and abut against the slide rail 31 to play a guiding role. Preferably, a locking rib 54 is also provided on the inner side of the flap 53 to prevent the flap 53 from disengaging from the slide rail 31, ensuring that the adjusting member 5 can slide stably along the slide rail 31 and avoiding the problem of the locking rod 4 failing due to the adjusting member 5 falling off. At the same time, the design of the locking rib 54 also provides additional safety protection to ensure the stability of the locking rod 4 in the locked state.

[0055] In summary, the sliding door top lock mechanism provided by this utility model has the following technical effects:

[0056] 1. By moving the position of the latch 413 from the side of the door to the top of the door, the visual obstruction caused by the protruding latch 413 is avoided, making the design of the sliding door simpler and more aesthetically pleasing. At the same time, this design also reduces the risk of bumps and injuries to users due to the protruding latch 413 during daily use, especially in narrow or high-traffic spaces, significantly improving safety.

[0057] 2. At least one adjusting element 5 is provided on the locking rod 4, allowing the user to easily adjust the effective length of the locking rod 4 according to the actual distance between the sliding door and the upper track 2. This design solves the compatibility problem caused by the fixed length of the locking rod 4 in traditional top lock mechanisms, enabling the top lock mechanism to adapt to sliding doors of different models, sizes, and installation positions, thereby improving the product's versatility and market competitiveness;

[0058] 3. Due to the adjustable length of locking rod 4, installers do not need to frequently change locking rods 4 of different lengths when assembling different models of sliding doors, thus simplifying the installation process and reducing debugging difficulty and cost. This not only improves installation efficiency but also reduces rework and repair costs caused by mismatched locking rod 4 lengths;

[0059] 4. By precisely adjusting the length of the locking rod 4, it is ensured that the locking rod 4 can be tightly locked with the upper track 2, thereby improving the stability and safety of the sliding door. This design makes the sliding door less prone to loosening or falling off during long-term use, extending the product's service life.

[0060] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A sliding door top lock mechanism, characterized in that, include: Lock box (1), the lock box (1) includes a lock box assembly part (11) and a lock groove (12), the lock box assembly part (11) is used to assemble with the upper track (2); A vertical frame (3) is provided with a slide rail (31) along its length direction. The vertical frame (3) is used to assemble with the side of the door body. Locking rod (4), the locking rod (4) is slidably disposed in the slide rail (31), and one end is used to be adapted to be inserted into the locking groove (12), and the other end is linked with the door handle (6) to allow the locking rod (4) to extend into or disengage from the locking groove (12); The locking rod (4) is provided with at least one adjusting member (5) for adjusting the length of the locking rod (4).

2. The sliding door top lock mechanism according to claim 1, characterized in that, The locking bar (4) includes: A locking member (41), one end of which is adapted to be inserted into the locking groove (12); Linkage rod (42), one end of which is connected to the other end of the locking member (41), and the other end is linked to the handle (6); The adjusting member (5) is disposed between the locking member (41) and the linkage rod (42), and / or, the adjusting member (5) is disposed between the linkage rod (42) and the handle (6).

3. A sliding door top lock mechanism according to claim 2, characterized in that, The locking member (41) and / or the handle (6) are provided with a first adjustment part for engaging with the adjusting member (5), and the adjusting member (5) is provided with a second adjustment part corresponding to the first adjustment part. The first adjustment part and the second adjustment part have at least two replaceable engagement positions in the vertical direction.

4. A sliding door top lock mechanism according to claim 3, characterized in that, In the first adjustment part and the second adjustment part, one is an outwardly protruding snap-fit ​​strip (51), and the snap-fit ​​strip (51) is provided with at least one set of snap teeth (511) on both sides; the other is an inwardly recessed snap-fit ​​opening (411), and the snap-fit ​​opening (411) is provided with at least two sets of tooth grooves (412) on both sides corresponding to the snap teeth (511), and the snap teeth (511) and the tooth grooves (412) are adapted to snap-fit.

5. A sliding door top lock mechanism according to claim 4, characterized in that, An auxiliary alignment block (512) is provided on the side of the snap-fit ​​strip (51) facing the door body. The projection of the auxiliary alignment block (512) on the snap-fit ​​strip (51) does not exceed the area of ​​the connection surface between the snap-fit ​​strip (51) and the auxiliary alignment block (512). The farther the auxiliary alignment block (512) is from the snap-fit ​​strip (51), the smaller the projected area of ​​its cross section on the snap-fit ​​strip (51).

6. A sliding door top lock mechanism according to claim 4, characterized in that, The snap-fit ​​strip (51) is provided with a snap-fit ​​strip reinforcing rib (513) on the side facing the door body.

7. A sliding door top lock mechanism according to claim 2, characterized in that, At least one end of the linkage rod (42) is provided with a first assembly part, and the adjusting member (5) is provided with a second assembly part corresponding to the first assembly part. The first assembly part and the second assembly part are fixedly connected.

8. A sliding door top lock mechanism according to claim 7, characterized in that, In the first assembly part and the second assembly part, one is a protruding locking block (421) and the other is a concave locking groove (52), and the locking block (421) engages with the locking groove (52).

9. A sliding door top lock mechanism according to claim 2, characterized in that, The linkage rod (42) is provided with a linkage rod reinforcing rib (422).

10. A sliding door top lock mechanism according to claim 1, characterized in that, The adjusting member (5) is provided with flaps (53) on both sides for sliding along the slide rail (31), and the flaps (53) are provided with locking ribs (54) on the inner side for preventing the flaps (53) from disengaging from the slide rail (31).

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