Hidden self-locking door lock

Abstract

The utility model discloses a hidden type self-locking door lock which comprises a main body, a lock hook, a lock catch, an elastic piece and a limiting piece, the lock hook is rotationally arranged on the main body, the elastic piece is located between the main body and the lock hook and used for driving the lock hook to reset, the lock catch is matched with the lock hook and used for unlocking or locking, and the limiting piece is installed on the lock catch and used for limiting resetting of the lock hook. And the limiting piece is separated from the lock hook along with the relative movement of the lock catch and the lock hook, and the lock hook resets under the action of the elastic piece. According to the working principle that the lock hook is matched with the lock catch, the limiting piece suitably limits the lock hook, resetting of the lock hook after the lock catch is moved can be facilitated, other external force needing to be additionally applied when the door lock is opened and closed can be counteracted through the limiting piece, the using process of the door lock is simplified, and the door lock is more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of cabinet door lock technology, and in particular to a concealed self-locking door lock. Background Technology

[0002] Currently, the panel and chassis of hemodialysis equipment are connected by screws. This method has limitations in clinical use, as the locking process can be overlooked, leading to the safety hazard of the panel accidentally opening during operation. Furthermore, during transportation, external forces such as vibration can cause the screws to loosen, affecting the safety of transporting the equipment. Therefore, it is urgent to adopt alternative locking mechanisms for the panel and chassis of hemodialysis equipment, enabling them to automatically lock together when a preset closing angle is reached. This would effectively eliminate the risk of accidental panel opening due to human error, ensuring the safety of the treatment process and the stability of equipment operation.

[0003] Self-locking door locks on the market mainly consist of a latch, a hook, and a spring mechanism. The latch and hook are installed on the housing and the panel, respectively. The hook rotates and separates from the latch to unlock the panel and housing. The hook returns to its original position under the action of the spring mechanism, and the panel moves toward the hook to lock the latch and hook together, thus completing the self-locking function.

[0004] However, when using existing self-locking door locks, the operator needs to apply additional external force to counteract the rebound force of the lock hook and cannot let go, otherwise the lock hook will automatically return to its original position and lock the panel latch under the action of the elastic element. The operation is relatively cumbersome and not convenient enough. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a concealed self-locking door lock, which adds a limiting component. The limiting component can restrict the automatic engagement of the lock hook and lock buckle after the lock hook and lock buckle are unlocked, thereby reducing the difficulty of unlocking the panel and the chassis.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a concealed self-locking door lock, comprising a main body, a lock hook, a lock buckle, an elastic element, and a limiting element.

[0007] The locking hook is mounted on the main body and rotates.

[0008] The elastic element is located between the body and the locking hook, and is used to drive the locking hook to reset.

[0009] The latch and hook work together to unlock or lock.

[0010] The limiting element is installed on the latch to restrict the lock hook from resetting. As the latch and the lock hook move relative to each other, the limiting element separates from the lock hook, and the lock hook resets under the action of the elastic element.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The main body and the latch of this application can be set on the panel and the chassis respectively, or they can be set on the chassis and the panel respectively. As long as the locking hook and the latch on the main body are matched to enable the unlocking and locking of the panel and the chassis, it is acceptable.

[0013] The structure of the hook, latch, and elastic element can all adopt the structure of existing technology. That is, the latch is roughly "door" shaped, and the horizontal section of the latch adopts a cylindrical structure; the hook is a hook-shaped structure, and a guide surface that cooperates with the latch is provided on the outside of the hook; the elastic element can be a spring, torsion spring, elastic sheet, etc., to ensure that after the hook rotates under the action of external force, the external force disappears, and the hook can be reset under the action of the elastic element.

[0014] This application adds a limiting component to the existing self-locking door lock. During use, the lock hook rotates under external force, unlocking the latch. When the lock hook rotates to the limiting component position, the external force on the lock hook disappears. Because the limiting component restricts the lock hook's return to its original position, even if the panel does not move, the lock hook will not return to its original position under the action of the elastic component and lock with the latch. This avoids the inconvenience caused by the need for continuous external force to counteract the rebound force of the elastic component in existing technologies. Simultaneously, since the limiting component is installed on the latch, after the lock hook and latch are unlocked, there will be relative movement between them, which is the panel opening operation. Correspondingly, the limiting component separates from the lock hook. At this time, the lock hook returns to its original position under the action of the spring component. Therefore, when the panel is closed with the housing after operation, the latch and lock hook are equivalent to the self-locking door lock in existing technologies, achieving self-locking operation.

[0015] The limiting component of this application is based on the working principle of the lock hook and the latch. It can appropriately limit the lock hook and facilitate the reset of the lock hook after the latch moves. By using the limiting component, the additional external force required when opening and closing the door lock can be offset, simplifying the use of the door lock and making the use of the door lock more convenient.

[0016] Furthermore, the latch includes a connecting part that mates with the hook and a mounting part that is fixed to the connecting part. A limiting member is located on the mounting part, and when the connecting part is locked with the hook, the limiting member is located on the rotation path of the hook.

[0017] Furthermore, the limiting component includes an elastic telescopic pin, and the locking hook is provided with a limiting slot that cooperates with the elastic telescopic pin. The elastic telescopic pin is inserted into the limiting slot to limit the locking hook from resetting.

[0018] Furthermore, the lock hook is provided with a guide slope that works in conjunction with the elastic telescopic pin, and the guide slope and the limiting groove are arranged adjacent to each other in the rotation direction of the lock hook;

[0019] When the locking hook rotates, the elastic telescopic pin retracts under the action of the guide slope, and then extends to engage with the limit slot.

[0020] Furthermore, when the connecting part mates with the locking hook, the limiting groove is adjacent to the connecting part, and the limiting groove is provided with a transition plane.

[0021] When in use, the locking hook moves away from the connecting part, the elastic telescopic pin moves smoothly along the transition plane and separates from the locking hook, and the locking hook is reset under the action of the elastic element.

[0022] Furthermore, the lock hook is fixed with a rotating pin, which is rotatably connected to the main body. The rotating pin is driven to rotate through a connecting piece, thereby driving the lock hook to rotate.

[0023] Furthermore, the connecting component includes a first link, a second link, and a third link that are hinged in sequence, wherein the first link is fixed with a drive pin, the drive pin is rotatably connected to the main body, and the third link is fixed with a rotating pin;

[0024] When in use, the drive pin rotates, which in turn drives the rotating pin to rotate.

[0025] Furthermore, the main body is provided with two spaced-apart limit posts, which are used to limit the rotation angle of the rotating pin.

[0026] Furthermore, the drive pin is provided with a non-circular insertion hole, which is used to connect with the drive component. External force is applied to the drive component to drive the drive pin to rotate.

[0027] Furthermore, the connection side between the lock hook and the latch and the connection side between the lock hook and the elastic element are located on both sides of the rotating pin, respectively. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an assembly structure of the present invention with a chassis and a panel;

[0029] Figure 2 This is an exploded view of the structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of this utility model;

[0031] Figure 4 This diagram shows the fit between the locking hook, rotating pin, and connecting parts in this utility model.

[0032] Figure 5 This is a schematic diagram of the locking hook structure in this utility model;

[0033] Figure 6 This is a diagram showing the fit between the elastic telescopic pin and the locking hook in this utility model;

[0034] Figure 7This is another diagram showing the fit between the elastic telescopic pin and the locking hook in this utility model;

[0035] Figure 8 This is a diagram showing the first possible engagement relationship between the latch and the hook in this utility model when they self-lock.

[0036] Figure 9 This diagram illustrates the second possible engagement relationship between the latch and the hook in this invention when they self-lock.

[0037] Figure 10 This is a diagram showing the locking relationship between the latch and the hook in this utility model.

[0038] In the diagram: chassis 100, panel 200, second link 1, first link 2, drive pin 3, socket 301, latch 4, elastic telescopic pin 401, connecting part 402, mounting part 403, third link 5, main body 6, first limiting post 601, second limiting post 602, elastic element 7, rotating pin 8, locking hook 9, guide surface 901, guide slope 902, limiting slot 903, transition plane 904. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] like Figure 1-10 As shown, a concealed self-locking door lock includes a main body 6, a locking hook 9, a latch 4, an elastic element 7, and a limiting element. The locking hook 9 is rotatably mounted on the main body 6. The elastic element 7 is located between the main body 6 and the locking hook 9 and is used to drive the locking hook 9 to reset. The latch 4 and the locking hook 9 cooperate to unlock or lock. The limiting element is installed on the latch 4 and is used to restrict the locking hook 9 from resetting. The limiting element separates from the locking hook 9 as the latch 4 and the locking hook 9 move relative to each other. The locking hook 9 resets under the action of the elastic element 7.

[0041] The main body 6 serves as the mounting structure for the locking hook 9, facilitating its rotation. It also centrally houses the components driving the hook 9's rotation, as well as the elastic element 7. When the entire door lock mates with the panel 200 and the housing 100, simply fix the main body 6 and the latch 4 to their corresponding components. To achieve locking and unlocking of the panel 200 and the housing 100, the main body 6 and the latch 4 can be respectively mounted on the panel 200 and the housing 100, or vice versa. The key is to ensure that the locking hook 9 and the latch 4 on the main body 6 cooperate to unlock and lock the panel 200 and the housing 100. Figure 1As shown, in this application, the latch 4 is fixed to the panel 200, the main body 6 is fixed to the chassis 100, the panel 200 is hinged to one side of the chassis 100, and the door lock is set on the other side of the panel 200 and the chassis 100. When the panel 200 and the chassis 100 are unlocked, the panel 200 can rotate along the chassis 100 to realize the opening and closing of the panel 200 and the chassis 100.

[0042] To enable the door lock to have a self-locking function, the structures of the lock hook 9, the latch 4, and the elastic element 7 in this application can all adopt the structures in the prior art. That is, the latch 4 is roughly "door" shaped, and the horizontal section of the latch 4 adopts a cylindrical structure; the lock hook 9 is a hook-shaped structure, and a guide surface 901 that cooperates with the latch 4 is provided on the outside of the lock hook 9; the elastic element 7 can be a spring, torsion spring, elastic sheet, etc., to ensure that after the lock hook 9 rotates under the action of external force, the external force disappears, and the lock hook 9 can be reset under the action of the elastic element 7. In this application, the elastic element 7 is a spring, one end of the spring is fixedly connected to the main body 6, and the other end is fixedly connected to the lock hook 9.

[0043] like Figure 2 , 3 As shown, in this application, the main body 6 has a groove-shaped structure, with the groove side of the main body 6 facing the latch 4. The outer bottom side of the main body 6 is fixed to the housing 100, and the latch 9 is rotatably disposed within the groove of the main body 6. One end of the latch 9 has a hook-shaped structure, and the other end of the latch 9 is connected to the elastic element 7. A rotating pin 8 is fixed in the middle of the latch 9, and the rotating pin 8 is rotatably connected to the main body 6. The rotating pin 8 and the main body 6 can be rotatably connected through a rotating shaft or the like. In use, an external force drives the rotating pin 8 to rotate, which can drive the hook-shaped structure of the latch 9 to rotate. When the external force disappears, if there are no other structural restrictions, the latch 9 can be reset (returned to its original position) under the action of the elastic element 7.

[0044] Rotating the pivot pin 8 allows the lock hook 9 to rotate. In this application, the pivot pin 8 is driven to rotate via a connector, which in turn drives the lock hook 9 to rotate. The connector can be an existing key, which is directly connected to the pivot pin 8 via a plug-in connection. When an external force is applied to the key, rotating the key will drive the pivot pin 8 and the lock hook 9 to rotate, thus achieving the purpose of rotating the lock hook 9.

[0045] Because the rotating pin 8 and the elastic element 7 are installed close to each other, according to the lever principle, if the rotating pin 8 is directly driven to rotate, a larger external force is required to drive it to rotate. Therefore, to reduce the driving force for the rotating pin 8 to rotate, this application adopts a multi-link structure at the connection point. Specifically, the connecting element includes a first link 2, a second link 1, and a third link 5 that are hinged in sequence. The first link 2 is fixed with a driving pin 3, which is rotatably connected to the main body 6. The third link 5 is fixed to the rotating pin 8. In use, the driving pin 3 rotates, causing the rotating pin 8 to rotate.

[0046] In addition to a rod-shaped structure, the first link 2 in this application can also be a disc. The center of the disc is connected to the drive pin 3, and the eccentric position of the disc is hinged to the second link 1. When the disc rotates, it can also drive the position of the second link 1 to change, thereby driving the third link 5 to rotate. The third link 5 is connected to the rotating pin 8, thereby driving the rotating pin 8 and the locking hook 9 to rotate.

[0047] In this embodiment, the specific connection method of the connector is as follows: Figure 2 , 3 As shown in Figure 4, one end of the first connecting rod 2 is fixed to the drive pin 3. The drive pin 3 passes through the main body 6 and is rotatably connected to the main body 6 via bearings, etc. The end of the drive pin 3 extends out of the side wall of the housing 100 and is detachably connected to the drive component, which can be a rotating handle or a special-shaped key, etc. The other end of the first connecting rod 2 is hinged to one end of the second connecting rod 1, the other end of the second connecting rod 1 is hinged to one end of the third connecting rod 5, and the other end of the third connecting rod 5 is fixed to the rotating pin 8. Due to the presence of the first connecting rod 2, the second connecting rod 1, and the third connecting rod 5, it is equivalent to extending the rotating arm of the rotating pin 8. According to the lever principle, at this time, a smaller force can be used to drive the third connecting rod 5 to rotate along the rotating pin 8, thereby driving the lock hook 9 to rotate. Furthermore, due to the four-bar linkage formed by the connecting parts, the driving force of the rotating pin 8 can be transmitted over a long distance, making the installation position of the drive pin 3 more flexible and facilitating the overall design and installation of the door lock.

[0048] To facilitate the detachable connection between the driving component and the driving pin 3, this application provides a non-circular insertion hole 301 on the driving pin 3. The insertion hole 301 is used to insert into the driving component, and external force is applied to the driving component to drive the driving pin 3 to rotate. The insertion hole 301 can be a non-circular hole such as a square hole, hexagonal hole, or octagonal hole. The driving component is provided with a pin that mates with the insertion hole 301. Rotating the pin can drive the driving pin 3 to rotate. The rotation of the driving pin 3, under the action of the first connecting rod 2 and the second connecting rod 1, can drive the third connecting rod 5 to rotate, thereby driving the rotating pin 8 and the locking hook 9 to rotate, realizing the unlocking of the locking hook 9 and the latch 4.

[0049] To enable the latch 4 and the hook 9 to unlock and self-lock, the structure of the latch 4, in addition to existing door-like designs, can also be configured as the structure described in this application. Specifically, the latch 4 includes a mounting part 403 and a connecting part 402. The connecting part 402 cooperates with the hook 9, and the mounting part 403 is used to fix the limiting member. The mounting part 403 functions similarly to the main body 6, providing a mounting fulcrum for the entire latch 4, facilitating the fixing of the latch 4 and the panel 200. Therefore, the mounting part 403 can adopt any structure. In this embodiment, for example... Figure 2As shown, the mounting part 403 is configured as a groove-shaped structure, and the connecting part 402 is located within the groove of the mounting part 403 and suspended and fixed between the two side walls of the groove of the mounting part 403. This configuration provides room for the rotation of the locking hook 9, facilitating the locking and unlocking of the locking hook 9 and the connecting part 402. Since the connecting part 402 of the latch 4 can achieve self-locking with the locking hook 9 during use, it is necessary for the latch 4 to move, push the locking hook 9, drive the locking hook 9 to rotate, and then smoothly hook onto the connecting part 402. To facilitate the cooperation between the locking hook 9 and the connecting part 402, the connecting part 402 of this application is a rolling pin. The rolling pin consists of an inner and outer mounting shaft and a rotating sleeve. The mounting shaft is fixed on the mounting part 403, and the rotating sleeve rolls along its circumference but does not move along its length. Therefore, when the rotating sleeve and the locking hook 9 cooperate, there is less frictional resistance, which facilitates self-locking between the two.

[0050] During normal use of the door lock, if there is no stopper, after the lock hook 9 rotates and separates from the connecting part 402, if the panel 200 is not moved in time, additional force is needed to counteract the rebound force of the elastic element 7; if there is no additional external force, the lock hook 9 will reset and connect and lock with the connecting part 402 of the latch 4. Because the panel 200 of the hemodialysis equipment has many other precision components, extra care is required when opening the panel 200. Furthermore, the panel 200 often opens downwards. Therefore, after the lock hook 9 separates from the connecting part 402, the operator needs to support the panel 200 with both hands and slowly move it to open it. Therefore, the existing simple self-locking door lock is not suitable for use with the chassis 100 of the hemodialysis equipment.

[0051] This application combines the characteristics of existing self-locking door locks and adds a limiting component based on the unlocking principle of the lock hook 9 and the latch 4. The limiting component can restrict the reset of the lock hook 9 after the lock hook 9 and the latch 4 are unlocked, and can also move with the latch 4 to separate from the lock hook 9, so as to facilitate the reset of the lock hook 9 and ensure that the latch 4 and the lock hook 9 can achieve self-locking when the panel 200 is closed.

[0052] Specifically, the limiting member is located on the mounting part 403, and when the connecting part 402 is locked with the locking hook 9, the limiting member is located on the rotation path of the locking hook 9. The main function of the limiting member is that after the locking hook 9 separates from the latch 4, the panel 200 is not yet opened, and the position of the latch 4 remains unchanged. At this time, it is necessary to restrict the locking hook 9 from resetting under the action of the elastic member 7. For this reason, the limiting member mainly restricts the return of the locking hook 9 during this process. To ensure that the limiting member can cooperate with the rotated locking hook 9, the setting position of the limiting member must be located on the rotation path of the locking hook 9. After the locking hook 9 rotates to the position, it can be locked under the action of the limiting member to prevent the locking hook 9 from returning. At this time, the force applied to the driving member (the operator's hand) can be removed, and the operator can hold the panel 200 with both hands and slowly open the panel 200.

[0053] To achieve the cooperation between the limiting component and the locking hook 9, the limiting component of this application includes an elastic telescopic pin 401, and the locking hook 9 is provided with a limiting groove 903 that cooperates with the elastic telescopic pin 401. The elastic telescopic pin 401 is inserted into the limiting groove 903 to limit the reset of the locking hook 9. Figure 2 , 3 As shown in Figures 6 and 7, the limiting component uses a spring plunger, and the corresponding elastic telescopic pin 401 is the plunger; of course, the limiting component can also be other structures, as long as it is ensured that the elastic telescopic pin 401 can extend and retract toward the locking hook 9. The elastic telescopic pin 401 is inserted into the limiting slot 903 to lock the limiting component and the locking hook 9, preventing the locking hook 9 from resetting.

[0054] To ensure smooth engagement of the elastic telescopic pin 401 with the limiting slot 903, this application provides a guide slope 902 on the locking hook 9 to cooperate with the elastic telescopic pin 401. The guide slope 902 and the limiting slot 903 are adjacent to each other in the rotation direction of the locking hook 9. When the locking hook 9 rotates, the elastic telescopic pin 401 retracts under the action of the guide slope 902, and extends to engage with the limiting slot 903. Figure 7 As shown, the end of the elastic telescopic pin 401 has a spherical structure. The guide slope 902 is inclined away from the end of the elastic telescopic pin 401 that contacts the locking hook 9, moving away from that end. Referring to the figure, the angle γ between the plane of the guide slope 902 contacting the elastic telescopic pin 401 or the tangent plane of the contact point and the vertical plane is between 0-90°. As the locking hook 9 rotates, the guide slope 902 forces the elastic telescopic pin 401 to retract until the limiting groove 903 rotates above the elastic telescopic pin 401. At this point, the limiting groove 903 provides sufficient space for the elastic telescopic pin 401 to extend and lock with the limiting groove 903. Due to the height difference between the limiting groove 903 and the guide slope 902, after the elastic telescopic pin 401 and the limiting groove 903 are locked, they will not separate under the rebound of the elastic element, ensuring that the locking hook 9 will not reset.

[0055] To ensure that the elastic telescopic pin 401 of the limiting member can automatically release from the limiting slot 903 when the latch 4 moves, this application designs the structure of the limiting slot 903. Specifically, when the connecting part 402 cooperates with the locking hook 9, the limiting slot 903 is adjacent to the connecting part 402, and the limiting slot 903 is provided with a transition plane 904. In use, when the locking hook 9 moves away from the connecting part 402, the elastic telescopic pin 401 moves smoothly along the transition plane 904 and separates from the locking hook 9, and the locking hook 9 resets under the action of the elastic member 7. Figure 4 , 5As shown in Figures 6 and 7, the limiting slot 903 is a sunken platform structure. The stepped sidewall of the limiting slot 903 is adjacent to the guide slope 902, and the transition plane 904 is adjacent to the connecting part 402. In use, when the panel 200 moves, it drives the latch 4 to move, and the elastic telescopic pin 401 moves accordingly. Due to the presence of the transition plane 904, the elastic telescopic pin 401 can move smoothly along the transition plane 904 until it separates from the locking hook 9 while maintaining its telescopic state. The elastic telescopic pin 401 separates from the locking hook 9, and the locking hook 9 unlocks from the limiting member. At this time, the locking hook 9 can be reset under the action of the elastic member 7.

[0056] To prevent excessive rotation of the locking hook 9 and to protect the connecting parts, this application provides two spaced-apart limiting posts on the main body 6. The two limiting posts can be positioned on both sides of the first connecting rod 2 to limit the rotation angle of the first connecting rod 2, thereby restricting the rotation angle of the rotating pin 8 and the locking hook 9. Simultaneously, the two limiting posts can also be positioned on both sides of the third connecting rod 5 to limit the rotation angle of the third connecting rod 5, the rotating pin 8, and the locking hook 9. In this application, the two limiting posts are respectively positioned on both sides of the third connecting rod 5, such as... Figure 2 , 3 As shown in Figure 4, the two limiting posts are the first limiting post 601 and the second limiting post 602. The first limiting post 601 and the second limiting post 602 are located on both sides of the third connecting rod 5. The third connecting rod 5 rotates within the space between the first limiting post 601 and the second limiting post 602. The installation positions of the first limiting post 601 and the second limiting post 602 can limit the rotation angle of the rotating pin 8. Among them, the first limiting post 601 can prevent the operating panel 200 from rotating in the opposite direction when it is opened; the second limiting post 602 can control the maximum opening angle and protect the hinge structure (connector).

[0057] The principle of this application:

[0058] like Figure 10 As shown, the panel 200 and the chassis 100 are locked in this state. At this time, the connecting part 402 of the locking hook 9 and the latch 4 is attached and connected.

[0059] The operator inserts the drive component into the drive pin 3 and applies force to the drive component. The drive component and drive pin 3 rotate. The rotation of drive pin 3, through the first link 2, the second link 1 and the third link 5, can drive the rotating pin 8 to rotate. The rotation of rotating pin 8 drives the locking hook 9 to rotate. The rotation of locking hook 9 separates from the connection part 402 of locking buckle 4, thereby unlocking locking hook 9 and locking buckle 4.

[0060] When the locking hook 9 is rotated to the position of the limiting component, the limiting slot 903 of the locking hook 9 and the elastic telescopic pin 401 are inserted, so that the locking hook 9 is limited to the latch 4 in this state. At this time, the external force applied by the operator to the driving component disappears, and the locking hook 9 will not return to the position and lock with the latch 4, thus completing the unlocking of the panel 200 and the chassis 100.

[0061] The operator opens panel 200, causing the latch 4 and the limiting component to move, so that the elastic telescopic pin 401 separates from the limiting slot 903, thereby unlocking the limiting component and the locking hook 9. After the locking hook 9 is free from other external forces, the elastic component 7 will drive the locking hook 9 to reset.

[0062] When panel 200 needs to be closed, the latch 4 on panel 200 moves toward the hook 9. When the connecting part 402 of latch 4 contacts latch 4, such as Figure 8 , 9 As shown in Figure 10, the continuous movement of the latch 4 generates a thrust, which forces the hook 9 to rotate. After the hook 9 rotates to the position shown in Figure 10, the panel 200 closes in place. Under the action of the elastic element 7, the hook 9 resets and is attached to the connection part 402 of the latch 4, realizing the self-locking of the latch 4 and the hook 9, and completing the locking of the panel 200 and the chassis 100.

[0063] The limiting component of this application is based on the working principle of the lock hook 9 and the latch 4. It can appropriately limit the lock hook 9 and facilitate the reset of the lock hook 9 after the latch 4 moves. By using the limiting component, the additional external force required when opening and closing the door lock can be offset, simplifying the use of the door lock and making the use of the door lock more convenient.

[0064] This door lock structure replaces manual operation judgment with physical interaction logic. The synergistic effect of the wedge-shaped guide slope 902 on the lock hook 9 and the elastic energy storage system of the elastic element 7 ensures the inevitability of the locking action. It eliminates the risk of the operator missing the locking process due to visual obstruction or process memory deviation, which may cause the panel 200 to be in a state of incomplete constraint during equipment operation, resulting in functional shutdown or even iatrogenic damage. It also provides convenience for after-sales maintenance.

[0065] It is worth noting that, such as Figure 10 As shown, in the locked state, a tangent is drawn through the rotation center of the locking hook 9 to the elastic telescopic pin 401, and the angle between the tangent and the vertical direction is defined as θ. When the panel 200 is open, the swing angle α of the locking hook 9 should satisfy α≥θ; when the panel 200 is closed, the swing angle α of the locking hook 9 should satisfy α<θ.

[0066] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0067] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0068] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A concealed self-latching door lock characterized by: It includes a main body (6), a locking hook (9), a locking buckle (4), an elastic element (7), and a limiting element. The locking hook (9) is rotatably mounted on the main body (6). The elastic element (7) is located between the main body (6) and the locking hook (9) and is used to drive the locking hook (9) to reset. The latch (4) and the hook (9) work together to unlock or lock. The limiting member is installed on the latch (4) to limit the reset of the hook (9). The limiting member separates from the hook (9) as the latch (4) moves relative to the hook (9). The hook (9) is reset under the action of the elastic member (7).

2. The concealed self-latching door lock of claim 1, wherein: The latch (4) includes a connecting part (402) that cooperates with the hook (9) and a mounting part (403) that is fixed to the connecting part (402). The limiting member is located on the mounting part (403), and when the connecting part (402) is locked with the hook (9), the limiting member is located on the rotation path of the hook (9).

3. The concealed self-latching door lock of claim 2, wherein: The limiting component includes an elastic telescopic pin (401), and the locking hook (9) is provided with a limiting slot (903) that works in conjunction with the elastic telescopic pin (401). The elastic telescopic pin (401) is inserted into the limiting slot (903) to limit the locking hook (9) to reset.

4. The concealed self-latching door lock of claim 3, wherein: The locking hook (9) is provided with a guide slope (902) that works in conjunction with the elastic telescopic pin (401). The guide slope (902) and the limiting groove (903) are arranged adjacent to each other in the rotation direction of the locking hook (9). When the locking hook (9) rotates, the elastic telescopic pin (401) retracts under the action of the guide slope (902), and the elastic telescopic pin (401) extends out and inserts into the limiting slot (903).

5. The concealed self-latching door lock of claim 4, wherein: When the connecting part (402) engages with the locking hook (9), the limiting groove (903) is adjacent to the connecting part (402), and the limiting groove (903) is provided with a transition plane (904). When in use, the locking hook (9) moves away from the connecting part (402), the elastic telescopic pin (401) moves smoothly along the transition plane (904) and separates from the locking hook (9), and the locking hook (9) is reset under the action of the elastic element (7).

6. The concealed self-latching door lock according to any one of claims 1-5, characterized in that: The locking hook (9) is fixed with a rotating pin (8), which is rotatably connected to the main body (6). The rotating pin (8) is driven to rotate through the connecting piece, thereby driving the locking hook (9) to rotate.

7. The concealed self-latching door lock of claim 6, wherein: The connecting component includes a first connecting rod (2), a second connecting rod (1) and a third connecting rod (5) that are hinged in sequence. The first connecting rod (2) is fixed with a drive pin (3), which is rotatably connected to the main body (6). The third connecting rod (5) is fixed with a rotating pin (8). When in use, drive pin (3) rotates, which in turn drives rotating pin (8) to rotate.

8. The concealed self-locking door lock according to claim 7, characterized in that: The main body (6) is provided with two spaced-apart limit pins, which are used to limit the rotation angle of the rotating pin (8).

9. A concealed self-latching door lock according to claim 7 or 8, characterized in that: The drive pin (3) is provided with a non-circular insertion hole (301). The insertion hole (301) is used to connect with the drive component. External force is applied to the drive component to drive the drive pin (3) to rotate.

10. The concealed self-latching door lock of claim 6, wherein: The connection side between the lock hook (9) and the lock buckle (4) and the connection side between the lock hook (9) and the elastic element (7) are located on both sides of the rotating pin (8).

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