A lock protection device with anti-mislocking feature

Abstract

This utility model discloses a lock protection device with anti-mislocking feature, relating to the field of sliding door lock technology, aiming to solve the problem of accidental locking and component damage caused by existing sliding door top locks. The device includes a track, a door body, a latch, a locking pin, a restraining element, and an elastic element. The door body can slide along the track between open and closed positions. The latch is fixed to the track, and the locking pin can move relative to the door body to switch between unlocked and locked positions. When locked, the locking pin and latch abut against the door body, limiting its movement. The restraining element is movable or rotatable on the door body and can switch between restrained and disengaged positions: when the door is closed, the latch pushes the restraining element to the disengaged position, and the locking pin can switch states normally; when the door is open, the elastic element pushes the restraining element to the restrained position, and the restraining element abuts against the locking pin, restricting the locking pin from moving to the locked position. This device, through the cooperation of the restraining element and the elastic element, structurally prevents accidental locking in the open position, protecting components and extending their lifespan.

Description

Technical Field

[0001] This utility model relates to the field of sliding door lock technology, and in particular to a lock protection device with anti-mislocking features. Background Technology

[0002] The lock mechanism is a core component of sliding door systems, widely used in homes, offices, and other settings. It uses mechanical limits to ensure the door is fixed in the closed position, preventing accidental sliding caused by external forces and ensuring the airtightness and safety of the space.

[0003] Existing sliding door top locks mainly consist of a top track, a locking mechanism, and a locking pin: the locking mechanism is installed inside the top track, and the locking pin is movable at the top of the door and can move up and down. When closing the door, the locking pin moves up to the locked position and abuts against the locking mechanism to limit its movement; when opening the door, the locking pin moves down to unlock, and the door can slide freely.

[0004] However, existing ceiling locks do not have a structure to prevent accidental locking: when the door is in the open position, if the lock pin is accidentally pushed to the locked position, the lock pin will collide violently with the lock buckle during the closing process, causing both to deform, wear or loosen, resulting in ceiling lock failure; it will also generate noise, shorten service life, increase maintenance costs, and in extreme cases, cause the ceiling track to deform and the door to jam, affecting use.

[0005] In summary, existing ceiling locks suffer from short service life, poor user experience, and high maintenance costs due to the lack of accidental locking protection, and cannot meet stability requirements. Designing a ceiling lock structure with accidental locking protection has become an urgent technical problem to be solved in the sliding door accessories industry. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a lock protection device with anti-mislocking features.

[0007] A lock protection device with anti-mislocking feature designed for this purpose is characterized by comprising a track, a door body, a lock fastener, a lock pin, a restraining element, and an elastic element.

[0008] The door body is slidably disposed relative to the track and can slide between the open position and the closed position;

[0009] The locking fastener is fixedly mounted on the track;

[0010] The locking pin is movable relative to the door body and can move between an unlocked position and a locked position; when the locking pin is in the locked position, the locking pin abuts against the latch to restrain the door body to remain in the open position; when the locking pin is in the unlocked position, the locking pin separates from the latch, and the door body can move from the closed position to the open position.

[0011] The constraint element is movable or rotatably mounted on the door and can move between the constrained position and the separated position;

[0012] When the door is in the closed position, the latch pushes the constraint element to the separated position, the constraint element is separated from the locking pin, and the locking pin can move between the unlocked position and the locked position;

[0013] When the door is in the open position, the elastic element pushes the constraint element to the constraint position, and the constraint element abuts against the locking pin to constrain the locking pin to move to the locked position.

[0014] Preferably, the constraint element is rotatably mounted on the door body, and one end of the elastic element is connected to the constraint element and the other end is connected to the door body.

[0015] Preferably, the constraint element is provided with an abutment portion;

[0016] When the constraint element is in the constraint position, the abutting part abuts against the locking pin for constraint.

[0017] When the constraint element is in the separated position, the abutment portion and the locking pin are separated from each other.

[0018] Preferably, the constraint element is provided with a plug-in portion, and the elastic element is a spring with one end of the spring plugged into the plug-in portion.

[0019] Preferably, the door body is provided with a mounting base, the constraint element is rotatably mounted on the mounting base, the mounting base is provided with a positioning groove, one end of the elastic element connected to the door body is inserted into the positioning groove, the mounting base is provided with a pin hole, and the locking pin is movably mounted in the pin hole.

[0020] Preferably, the locking pin is connected to a locking rod, which is movable up and down relative to the door body.

[0021] Compared with the prior art, this utility model achieves multiple key beneficial effects through the coordinated design of constraint elements and elastic elements, as follows:

[0022] First, the risk of accidental locking is eliminated at its source. When the door is in the open position, the elastic element automatically pushes the restraining element to the restrained position. At this time, the restraining element and the locking pin cooperate with each other. Even if the user accidentally pushes the locking pin to the locked position, the elastic element will still push the locking pin to the unlocked position when the user releases the force. This ensures that the locking pin cannot remain in the locked state that extends into the track, completely avoiding the core problems of "accidental locking in the open position and collision between the locking pin and the fastener when closing" in existing technologies. This ensures the safety and reliability of the lock from a structural perspective.

[0023] Secondly, it effectively protects the lock and track components, extending their service life. Even if the lock pin is accidentally pushed when the door is open, the elastic element will return it to the unlocked position after the force is released, preventing the pin from remaining in a locked state that could collide with the latch. Therefore, there is no direct collision between the lock pin and the latch during closing, avoiding problems such as lock pin deformation and wear, latch loosening and detachment, and, in extreme cases, localized track deformation. Compared to existing structures, this device significantly reduces wear and tear on components caused by collisions, lowers the cost of subsequent maintenance and replacement parts for users, and significantly extends the service life of the lock and the entire sliding door system.

[0024] Furthermore, the device balances ease of use with automated protection, enhancing the user experience. Its protective functions require no additional user intervention: when the door slides to the closed position, the locking mechanism on the track actively pushes the restraining element to the disengaged position, releasing the lock pin. At this point, the user can normally move the lock pin to lock the door without affecting the original closing and locking logic. When the door leaves the closed position and is in the open state, the elastic element automatically drives the restraining element to reset. Even if the lock pin is accidentally pushed, it will automatically return to its original position after the force disappears, eliminating the need for manual adjustment. This avoids the risk of accidental operation, simplifies the usage process, and eliminates collision noise, providing a smoother and quieter user experience. Attached Figure Description

[0025] Figure 1 A three-dimensional structural diagram of the door in the closed position;

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0027] Figure 3 A three-dimensional structural diagram of the door in the open position;

[0028] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0029] Figure 5 This is a cross-sectional structural diagram of the door in the closed position;

[0030] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] See Figures 1-6A lock protection device with anti-mislocking features includes a track 10, a door body 20, a latch 30, a locking pin 40, a restraining element 50, and an elastic element 60. The door body 20 is slidably disposed relative to the track 10 and can slide between an open position and a closed position. The latch 30 is fixedly disposed on the track 10. The locking pin 40 is movably disposed relative to the door body 20 and can move between an unlocked position and a locked position. When the locking pin 40 is in the locked position, the locking pin 40 abuts against the latch 30 to restrain the door body 20 to remain in the open position. When the locking pin 40 is in the unlocked position, the locking pin 40 abuts against the latch 30. When the door is in the closed position, the door body 20 can be moved from the closed position to the open position; the constraint element 50 is movable or rotatably disposed on the door body 20 and can move between the constraint position and the closed position; when the door body 20 is in the closed position, the latch 30 pushes the constraint element 50 to the closed position, the constraint element 50 and the locking pin 40 are in a separated state, and the locking pin 40 can move between the unlocked position and the locked position; when the door body 20 is in the open position, the elastic element 60 pushes the constraint element 50 to the constraint position, the constraint element 50 and the locking pin 40 abut against each other to constrain the locking pin 40 to move towards the locked position.

[0033] The working principle of this lock protection device with anti-mislock feature revolves around the sliding switching of the door between the open and closed positions. It achieves the anti-mislock function through the coordinated action of constraint elements, elastic elements, and locking pins. The specific process is as follows:

[0034] The protective state when the door is in the open position: When the door slides along the track to the open position (i.e., the position where the door and the locking mechanism on the track are completely misaligned), the locking mechanism on the track no longer applies force to the restraining element. At this time, the elastic element releases its elastic force, pushing the restraining element installed on the door to move or rotate to the restrained position. The restraining element in the restrained position forms an abutment with the locking pin on the door, directly limiting the movement trajectory of the locking pin. Even if the user accidentally pushes the locking pin to try to move it to the locked position, the restraining element will block the upward movement of the locking pin by abutting, or after the user's force is released, the continuous pushing force of the elastic element will drive the locking pin to reset, ensuring that the locking pin always remains in the unlocked position and cannot extend into the track to cooperate with the locking mechanism, fundamentally avoiding accidental locking.

[0035] The transition of the door from the open position to the closed position: When the user needs to close the door and pushes it along the track towards the closed position, because the locking pin is already in the unlocked position by the constraint element when the door is in the open position, the locking pin remains in a state of non-contact with the track throughout the sliding process and will not collide with the locking fasteners on the track. As the door gradually approaches the closed position, the constraint element on the door will first contact the locking fasteners on the track. The locking fasteners exert a continuous pushing force on the constraint element, forcing the constraint element to overcome the elastic force of the elastic element and gradually move or rotate from the constrained position to the disengaged position.

[0036] Normal locking state when the door is in the closed position: When the door is fully slid to the closed position, the thrust of the latch on the restraining element reaches its maximum, and the restraining element moves completely to the disengaged position. At this time, the restraining element is completely separated from the locking pin and no longer restricts the movement of the locking pin. The user can operate the locking pin normally, pushing it upward relative to the door to the locked position, so that the top of the locking pin abuts against the latch on the track; through the mechanical limit of the locking pin and the latch, the door is restrained to slide along the track to the open position, ensuring that the door is stably kept in the closed position; if it is necessary to open the door again, the user operates the locking pin in the opposite direction, moving it downward to the unlocked position, the locking pin and the latch separate, and the door can slide along the track to the open position again. At the same time, the restraining element resets under the action of the elastic element, and the door re-enters the anti-lock protection state.

[0037] See Figure 2 and Figure 6 The constraint element 50 is rotatably mounted on the door body 20. One end of the elastic element 60 is connected to the constraint element 50, and the other end is connected to the door body 20. When the door is in the open position, the elastic element pulls or pushes the constraint element to rotate around the door body to the constraint position through its own elastic force, abutting against the locking pin to restrict the upward movement of the locking pin. When the door slides to the closed position, the latch pushes the constraint element to overcome the elastic force of the elastic element and rotate in the opposite direction to the separation position, releasing the restriction on the locking pin and ensuring that the locking pin can be locked or unlocked normally, realizing the switching between anti-mislocking and normal locking.

[0038] See Figure 6 The constraint element 50 is provided with an abutment portion 510. When the constraint element 50 is in the constrained position, the abutment portion 510 abuts against the locking pin 40 for constraint. When the constraint element 50 is in the disengaged position, the abutment portion 510 and the locking pin 40 are separated from each other. The abutment portion of the constraint element is a key structure for switching between anti-mislocking and normal locking: when the door is in the open position, the constraint element is in the constrained position, and the abutment portion directly abuts against the locking pin, preventing the locking pin from moving upward through physical limitation; when the door slides to the closed position and the constraint element rotates to the disengaged position, the abutment portion and the locking pin are completely separated, no longer restricting the movement of the locking pin, ensuring that the locking pin can normally switch up and down to the locked or unlocked position.

[0039] See Figure 6 The constraint element 50 is provided with a plug-in portion 520, and the elastic element 60 is a spring, with one end of the spring plugged into the plug-in portion 520. The plug-in portion of the constraint element is the core structure connecting the elastic element (spring): by plugging into one end of the spring, it can stabilize and fix the spring position, preventing the spring from shifting or falling off, and can also efficiently transmit the spring force, ensuring that when the door is in the open position, the spring can push the constraint element to accurately return to the constraint position through the plug-in portion, providing reliable power support for the anti-lock function.

[0040] See Figure 6 The door body 20 is provided with a mounting base 70, the constraint element 50 is rotatably mounted on the mounting base 70, the mounting base 70 is provided with a positioning groove 710, one end of the elastic element 60 connected to the door body 20 is inserted into the positioning groove 710, the mounting base 70 is provided with a pin hole 720, and the locking pin 40 is movably mounted in the pin hole 720.

[0041] In this invention, the locking pin 40 is connected to a locking rod 410, which is vertically movable relative to the door body 20. The locking rod 410, as a connecting component to the locking pin 40, plays a crucial role in assisting the locking pin to move stably. Through its connection with the locking pin 40, it can drive the locking pin 40 to move synchronously up and down relative to the door body 20. This provides a convenient force carrier for the user to operate the locking pin (e.g., by pushing the locking pin to switch to the locked / unlocked position), enhances the stability of the locking pin during movement, prevents pin deviation, ensures precise engagement or disengagement of the locking pin with the latch 30, and guarantees the reliable implementation of the lock's locking and unlocking functions.

[0042] In this invention, when the constraint element 50 is movable, its moving direction is consistent with the sliding direction of the door body 20 along the track 10. The specific assembly and working process is as follows:

[0043] Structural Assembly: A strip-shaped groove extending along the sliding direction of the door body is opened at the top of the door body 20 near the locking pin 40 (the length of the groove is adapted to the movement stroke of the constraint element 50). The constraint element 50 is slidably embedded in the strip-shaped groove and can move smoothly back and forth along the groove. The elastic element 60 is a tension spring, one end of which is fixedly connected to the side of the constraint element 50 away from the locking fastener 30, and the other end is fixed to the groove wall away from the locking fastener 30. Under normal conditions, the elastic element 60 pulls the constraint element 50 with tension, so that it is kept in the constraint position near the locking pin 40 when there is no external force intervention. At the same time, the side of the locking pin 40 near the constraint element 50 is provided with a protruding limiting block, and the end face of the constraint element 50 facing the locking pin 40 is provided with an abutment surface adapted to the limiting block.

[0044] Anti-lock mechanism when the door is in the open position: When the door 20 is in the open position, the latch 30 on the track 10 is not in contact with the restraint element 50. The tension of the elastic element 60 causes the restraint element 50 to be in the restrained position. At this time, the abutting surface of the restraint element 50 is in close contact with the limiting block of the locking pin 40. The abutting surface and the limiting block can be beveled. If the user accidentally pushes the locking rod 410 to move the locking pin 40 to the locked position, the limiting block of the locking pin 40 will be blocked by the abutting surface of the restraint element 50 and will not be able to move the locking pin 40 upward. Even if the user applies a large external force to make the restraint element 50 move slightly against the tension of the elastic element 60 for a short time, once the external force is released, the elastic element 60 will immediately pull the restraint element 50 back to its original position and re-tighten the limiting block of the locking pin 40, ensuring that the locking pin 40 can never reach the locked position and avoiding accidental locking.

[0045] State switching when the door slides towards the closed position: When the user pushes the door 20 to slide towards the closed position along the track 10, as the door 20 moves, the restraint element 50 gradually approaches the latch 30 on the track 10. When the door 20 approaches the closed position, the end face of the latch 30 facing the restraint element 50 contacts the restraint element 50 and applies a pushing force along the sliding direction of the door (away from the locking pin 40). This pushing force overcomes the tension of the elastic element 60, causing the restraint element 50 to move along the strip groove towards the separation position, so that the contact surface of the restraint element 50 completely separates from the limiting block of the locking pin 40, releasing the restriction on the locking pin 40.

[0046] Normal locking engagement when the door is in the closed position: When the door 20 is fully closed, the restraint element 50 is completely separated under the pushing force of the latch 30. The user can push the locking pin 40 normally, causing the locking pin 40 to move upward to the locked position, so that the locking pin 40 and the latch 30 abut against each other to lock the door. When opening the door, push the door 20 to slide to the open position, the latch 30 and the restraint element 50 gradually separate, and the elastic element 60 pulls the restraint element 50 back to the restraint position, re-entering the anti-mislock state.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., 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 component 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. The terms "first" and "second" 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.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lock protection device with anti-mislocking feature, characterized in that: It includes a track (10), a door body (20), a locking fastener (30), a locking pin (40), a restraining element (50), and an elastic element (60); The door (20) is slidably disposed relative to the track (10) and can slide between the open position and the closed position; The locking element (30) is fixedly mounted on the track (10); The locking pin (40) is movably disposed relative to the door body (20) and can move between the unlocked position and the locked position; when the locking pin (40) is in the locked position, the locking pin (40) abuts against the latch (30) to restrain the door body (20) to remain in the open position; when the locking pin (40) is in the unlocked position, the locking pin (40) separates from the latch (30), and the door body (20) can move from the closed position to the open position; The constraint element (50) is movable or rotatably mounted on the door body (20) and can move between the constraint position and the separation position; When the door (20) is in the closed position, the latch (30) pushes the restraint element (50) to the separated position, the restraint element (50) and the locking pin (40) are in a separated state, and the locking pin (40) can move between the unlocked position and the locked position; When the door (20) is in the open position, the elastic element (60) pushes the constraint element (50) to the constraint position, and the constraint element (50) abuts against the locking pin (40) to constrain the locking pin (40) to move towards the locked position.

2. The lock protection device with anti-mislocking feature according to claim 1, characterized in that: The constraint element (50) is rotatably mounted on the door body (20), and one end of the elastic element (60) is connected to the constraint element (50) and the other end is connected to the door body (20).

3. A lock protection device with anti-mislocking feature according to claim 2, characterized in that: The constraint element (50) is provided with an abutment portion (510); When the constraint element (50) is in the constraint position, the abutting part (510) abuts against the locking pin (40) for constraint; When the constraint element (50) is in the separated position, the abutment portion (510) separates from the locking pin (40).

4. A lock protection device with anti-mislocking feature according to claim 2, characterized in that: The constraint element (50) is provided with a plug-in portion (520), and the elastic element (60) is a spring with one end of the spring plugged into the plug-in portion (520).

5. A lock protection device with anti-mislocking feature according to claim 2, characterized in that: A mounting base (70) is provided on the door body (20). The constraint element (50) is rotatably mounted on the mounting base (70). The mounting base (70) is provided with a positioning groove (710). One end of the elastic element (60) connected to the door body (20) is inserted into the positioning groove (710). The mounting base (70) is provided with a pin hole (720). The locking pin (40) is movably mounted in the pin hole (720).

6. A lock protection device with anti-mislocking feature according to claim 1, characterized in that: The locking pin (40) is connected to a locking rod (410), which is movable up and down relative to the door body (20).

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