A flatlock

Abstract

The application discloses a flat plate lock and relates to the technical field of locks, which comprises a lock tongue, two face plates and a lock cylinder, wherein the lock tongue comprises a lock tongue shell and an inner tongue body which is slidably arranged in the lock tongue shell; a reverse locking piece which cooperates with a rotating rod of the lock cylinder is further arranged in the lock tongue shell, and the reverse locking piece can lock or release the inner tongue body when rotating; a hinged flip plate is arranged on the face plate, and the flip plate is provided with a tooth hook which can act on the inner tongue body; when the inner tongue body is in a release state, the inner tongue body is driven to move inwards to realize unlocking by pulling the flip plate; and the inner tongue body is reset to an outward extension locking state after the flip plate is reset. The application has the advantages of beautiful appearance, convenient and safe use, low failure probability, and good universality and can be used cooperatively with an existing lock cylinder.

Description

Technical Field

[0001] This application relates to the field of lock technology, specifically to a flat lock. Background Technology

[0002] Currently, most door locks on the market operate by pressing down on the door handles (both inside and outside) to retract the bolt into the lock body, thus opening the door. Taking the novel eco-friendly door lock disclosed in Chinese utility model patent CN216553384U as an example, this lock consists of an inner handle seat fixed to the inner door panel, an outer handle seat fixed to the outer door panel, an inner handle, an outer handle, and a square shaft connecting the inner and outer handles and enabling their linkage. The inner handle is rotatably mounted on the inner handle seat, and the outer handle is rotatably mounted on the outer handle seat. However, this design causes both the inner and outer handles to protrude from the door panel surface, affecting not only the overall aesthetics of the lock but also posing certain safety hazards, such as people easily bumping into the handles or clothing getting caught on them.

[0003] To address the aforementioned issues, the flat lock disclosed in announcement number CN222376238U offers a novel solution. This flat lock consists of a panel and a bolt. An inner pressure plate and an outer pressure plate are pivotally mounted on the inner and outer sides of the panel, respectively. In their natural state, these plates remain flush with the panel, effectively preventing clothing snagging and collisions that can occur with traditional door handles. Furthermore, the entire lock panel is embedded within the door leaf, resulting in a simpler and more aesthetically pleasing appearance. The bolt consists of a housing and a bolt body that slides within the housing. An unlocking element is rotatably mounted within the housing; one end of this element engages with the bolt body, while the other end extends into the panel and connects to the inner and outer pressure plates. Pressing down on either the inner or outer pressure plate drives the unlocking element to rotate, causing the bolt body to slide into the housing and unlock. Compared to traditional door locks that require gripping and turning a handle downwards, this design is simpler and more convenient.

[0004] However, the aforementioned flat lock solution still has some shortcomings. For example, both the end of the unlocking component that mates with the bolt body and the other end that mates with the pressure plate use a relatively long cantilever structure, which is prone to deformation after prolonged use, thus affecting the reliability of the lock. Furthermore, this solution requires a specific deadbolt structure for deadbolt operation and is incompatible with existing lock cylinder structures. Utility Model Content

[0005] In view of this, this application provides a flat lock to solve the technical problems of existing flat locks being not durable and unable to be used with existing lock cylinders.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A flat lock includes a bolt, two panels, and a lock cylinder, wherein:

[0008] The latch includes a latch shell and an inner tongue body that is slidably installed in the latch shell. The latch shell is also provided with a deadbolt that works in conjunction with the rotating rod of the lock cylinder. When the deadbolt is rotated, it can lock or release the inner tongue body.

[0009] The panel has a hinged flip plate with teeth that can act on the inner tongue.

[0010] When the inner tongue is in the released state, pulling the flip plate will drive the inner tongue to move and retract inward to unlock it. After the flip plate is reset, the inner tongue will return to the extended and locked state.

[0011] Furthermore, the inner tongue body includes a locking tongue body and a locking tongue drive arm distributed at both ends. The locking tongue shell has a clearance hole for the locking tongue drive arm to pass through. The toothed hook drives the inner tongue body to slide by acting on the locking tongue drive arm, and the anti-locking component acts on the inner tongue body.

[0012] Furthermore, the inner tongue body also includes a lock tongue connecting frame connected between the lock tongue body and the lock tongue drive arm. The lock cylinder passes through the cavity of the lock tongue connecting frame, and the deadbolt is located in the cavity of the lock tongue connecting frame. The deadbolt includes a deadbolt arm, and the lock tongue connecting frame has a deadbolt abutment that works in conjunction with the deadbolt arm.

[0013] Furthermore, the deadbolt also includes a reinforcing rib arm, the two ends of which slide in a groove on the corresponding side wall of the latch shell to achieve stroke control.

[0014] Furthermore, the flip plate is flush with the outer surface of the panel when in the reset state.

[0015] Furthermore, the flip plate also has a limiting arm, which is used to abut against the panel to limit the maximum flip angle of the flip plate.

[0016] Furthermore, the panel has a U-shaped limiting groove, and the limiting arm is located inside the limiting groove.

[0017] Furthermore, a torsion spring is installed on the hinge shaft of the flip plate.

[0018] Furthermore, the bolt drive arm and the rotating rod of the lock cylinder are parallel to each other, and the hinge shaft of the flip plate is installed along the width direction of the flat lock.

[0019] Furthermore, after the flip plate is reset, the inner tongue body automatically resets to the extended and locked state under the action of external elastic force.

[0020] As can be seen from the above technical solution, the advantages of this utility model are:

[0021] 1. The flip plate is flush with the panel in its natural state, which effectively solves the problem of traditional door lock handles protruding from the panel and easily snagging clothing. It also prevents people from colliding with the door handle, eliminates safety hazards, and makes the flat lock look simple and beautiful.

[0022] 2. The lock is unlocked by pulling the flip plate, which is simple and convenient. Furthermore, the travel limit of the deadbolt and the flip plate makes it easy to judge the deadbolt, release, and unlock status.

[0023] 3. The use of a deadbolt allows the use of existing lock cylinders, resulting in good versatility.

[0024] 4. The structure of the inner tongue body avoids long cantilever structures, resulting in good structural stability and durability. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0026] Figure 1 This is a schematic diagram of the overall structure of this application. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the overall structure of this application. Figure 2 .

[0028] Figure 3 This is a schematic diagram of the overall structure of this application. Figure 3 .

[0029] Figure 4 For the purposes of this application Figure 3 Enlarged schematic diagram of the structure at point A in the diagram.

[0030] Figure 5 This is a side view of the present application.

[0031] Figure 6 For the purposes of this application Figure 5 The CC-direction sectional view.

[0032] Figure 7 This is a schematic diagram of the front view of this application.

[0033] Figure 8 For the purposes of this application Figure 7 A sectional view along the AA direction.

[0034] Figure 9 This is a schematic diagram of the internal structure of this application.

[0035] Figure 10 This is a schematic diagram of the internal structure of the locking tongue in this application.

[0036] Figure 11 This is a schematic diagram of the structure of the inner tongue body of the locking tongue in this application.

[0037] Figure 12 For the purposes of this application Figure 11 Enlarged schematic diagram of the structure at point B in the diagram.

[0038] Figure 13 This is a schematic diagram of the panel structure of this application.

[0039] Figure 14 This is a schematic diagram of the structure of the flip plate in this application.

[0040] Explanation of reference numerals in the attached drawings: 1-Lock tongue; 11-Lock tongue shell; 111-Allowing hole; 112-Slide groove; 12-Lock tongue body; 13-Lock tongue connecting frame; 14-Lock tongue drive arm; 15-Deadlock component; 151-Deadlock arm; 152-Reinforcing rib arm; 16-Snap-fit ​​arm; 2-Inner panel; 21-Inner snap plate; 211-Inner toothed hook; 212-Inner limit arm; 22-Inner limit groove; 23-Inner torsion spring; 24-Allowing groove; 25, 35-Snap plate; 3-Outer panel; 31-Outer snap plate; 311-Outer toothed hook; 312-Outer limit arm; 32-Outer limit groove; 33-Outer torsion spring; 4-Lock cylinder; 41-Rotating rod. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0042] refer to Figures 1 to 14 ,like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, this embodiment provides a flat lock, including a bolt 1, two panels and a lock cylinder 4. In actual use, the two panels are respectively installed on both sides of the door panel.

[0043] In this invention, the latch 1 includes a latch shell 11 and an inner tongue body slidably installed inside the latch shell 11. The latch shell 11 is also provided with a reverse locking member 15 that works in cooperation with the rotating rod 41 of the lock cylinder 4. When the reverse locking member 15 rotates, it can lock or release the inner tongue body. The panel has a hinged rotating plate located on one side of the reverse locking member 15, and the rotating plate 21 has a toothed hook that can act on the inner tongue body. When the inner tongue body is in the released state, by pulling the rotating plate to rotate, the toothed hook acts on the inner tongue body and drives the inner tongue body to move and retract, thereby unlocking. After the rotating plate is reset, the inner tongue body is reset to the extended and locked state under the action of the rotating plate or the action of external elastic force. When the reverse locking member 15 locks the inner tongue body, the inner tongue body remains in the extended and locked state, and at this time, it is impossible to unlock by pulling the rotating plate.

[0044] In this application, the two panels are the inner panel 2 and the outer panel 3 shown in the attached drawings. The inner flip plate 21 has an inner toothed hook 211 that can act on the inner tongue, and the outer flip plate 31 has an outer toothed hook 311 that can act on the inner tongue. When the inner tongue is in the released state, pulling the inner flip plate 21 / outer flip plate 31 will drive the inner tongue to move and retract, thereby unlocking the door and enabling unlocking operations from the inside or outside of the door. The lock cylinder 4 has its lock opening on the outer panel 3, which can prevent the flat lock from being opened from the outside by locking it. If necessary, the lock button connected to the rotating rod 41 is located on the inner panel 2. The outer surfaces of both the inner panel 2 and the outer panel 3 have multiple separable snap plates 25 and 35. These snap plates facilitate the concealment of the panel's fixing bolts, improving the aesthetics of the flat lock. The panel also has a relief groove 24 located on the inside of the flip plate, which facilitates the insertion of fingers for unlocking operations.

[0045] In this application, such as Figure 6 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, the inner tongue body includes a locking tongue body 12 and a locking tongue drive arm 14 distributed at both ends. The locking tongue drive arm 14 is symmetrically distributed on both sides. The locking tongue shell 11 has a clearance hole 111 that matches the corresponding end of the locking tongue drive arm 14. The locking tongue drive arm 14 can slide back and forth along the clearance hole 111. The inner tooth hook 211 and the outer tooth hook 311 are located on both sides of the locking tongue 1. The inner tooth hook 211 and the outer tooth hook 311 drive the inner tongue body to slide by acting on the corresponding end of the locking tongue drive arm 14. The anti-locking member 15 acts directly on the inner tongue body to lock the inner tongue body.

[0046] In this application, in order to connect the latch body 12 and the latch drive arm 14 into one unit, the inner latch body also includes a latch connecting frame 13 connected between the two. The lock cylinder 4 passes through the cavity of the latch connecting frame 13. The anti-locking member 15 is located in the cavity of the latch connecting frame 13. The anti-locking member 15 includes an anti-locking arm 151. The latch connecting frame 13 has an anti-locking abutment part that works in cooperation with the anti-locking arm 151.

[0047] Specifically, such as Figure 10 , Figure 11 and Figure 12 As shown, the latch connecting frame 13 has two spaced-apart side arms, forming a cavity between the two side arms for the installation of the anti-locking member 15 and the passage of the rotating rod 41. The two side arms of the latch connecting frame 13 are equipped with snap-fit ​​arms 16. The latch driving arm 14 is located between the two side arms and consists of two sub-drive arms. The sub-drive arms are inserted into the snap-fit ​​arms 16 for positioning. The two drive arms are bolted together to clamp the latch connecting frame 13 between the two drive arms, thus achieving a reliable connection between the latch connecting frame 13 and the latch driving arm 14. The two side arms are connected to the latch body 12 via a connecting block with a thickness greater than that of the side arms. When the anti-locking member 15 locks the inner tongue, the anti-locking arm 151 abuts against the connecting block; when the anti-locking member 15 releases the inner tongue, the anti-locking arm 151 is located on one side of the side arm. The thickness difference between the side arms and the connecting block ensures stable locking and unlocking, while also reducing the weight of the latch 1 and the processing difficulty of the latch connecting frame 13.

[0048] In this embodiment, the anti-locking component 15 also includes a reinforcing rib arm 152. The two ends of the reinforcing rib arm 152 are respectively slidably engaged with the sliding groove 112 on the corresponding side wall of the locking tongue shell 11 to achieve stroke control, so that the user can feel whether the anti-locking component 15 has moved to the correct position to determine whether the inner tongue body is locked or fully released.

[0049] In this embodiment, as Figure 8 , Figure 13 and Figure 14 As shown, the flip plate is flush with the outer surface of the panel when in the reset state. This effectively solves the problem of traditional door lock handles protruding from the panel and easily snagging clothing, while also preventing people from colliding with the door handle, eliminating safety hazards. Moreover, the entire panel is embedded inside the door leaf, making the flat lock more simple and beautiful in appearance.

[0050] In this embodiment, the flip plate also has a limiting arm, which abuts against the panel to limit the maximum flip angle of the flip plate. By limiting the maximum swing angle of the flip plate, on the one hand, the user can intuitively judge whether the latch body 12 has retracted into place, thereby confirming whether the lock is unlocked; on the other hand, it can reduce or avoid the collision between the inner tongue and the latch shell 11, making the thin-walled latch shell 11 less prone to deformation and affecting its use.

[0051] Specifically, the inner flip plate 21 has an inner limiting arm 212, which abuts against the inner panel 2 to limit the maximum flip angle of the inner flip plate 21; the outer flip plate 31 has an outer limiting arm 312, which abuts against the outer panel 3 to limit the maximum flip angle of the outer flip plate 31.

[0052] In this invention, the panel has a U-shaped limiting groove, and the limiting arm is located inside the limiting groove. The limiting arm abuts against the groove wall to achieve the maximum angle limiting.

[0053] Specifically, the inner panel 2 has a U-shaped inner limiting groove 22, and the inner limiting arm 212 is located in the inner limiting groove 22; the outer panel 3 has a U-shaped outer limiting groove 32, and the outer limiting arm 312 is located in the outer limiting groove 32.

[0054] like Figure 14 As shown, a torsion spring is installed on the hinge shaft of the flip plate, wherein one end of the torsion spring abuts against the panel and the other end abuts against the flip plate.

[0055] Specifically, an inner torsion spring 23 is installed on the hinge shaft of the inner flip plate 21, and an outer torsion spring 33 is installed on the hinge shaft of the outer flip plate 31. When the inner flip plate 21 / outer flip plate 31 is released after flipping and unlocking, the inner pressure plate 11 or the outer pressure plate 12 will be pressed, and the inner flip plate 21 / outer flip plate 31 will flip in the opposite direction under the action of the inner torsion spring 23 / outer torsion spring 33, thus achieving automatic reset.

[0056] In this invention, the locking tongue drive arm 14 and the rotating rod of the lock cylinder 4 are parallel to each other. The hinge shaft of the flip plate is installed along the length direction (movement direction of the inner tongue body) or the width direction of the flat lock. When installed along the length direction (the installation direction of the panel in the prior art document), the locking tongue drive arm 14 is provided with a wedge surface that cooperates with the toothed hook. The toothed hook moves along the wedge surface to drive the locking tongue drive arm 14 to move. When installed along the width direction, the toothed hook moves along the side wall of the locking tongue drive arm 14 to drive the locking tongue drive arm 14. Compared with the prior art document, this design saves transmission parts and reduces the possibility of failure.

[0057] In this invention, in order to ensure the smooth movement of the inner tongue, after the flip plate is reset, the inner tongue automatically resets to the extended and locked state under the action of external elastic force.

[0058] Specifically, the external elastic force is provided by an elastic pressing member disposed between the inner tongue body and the rear end plate (near the end of the locking tongue drive arm 14) of the locking tongue shell 11, or by a tension spring connected between the locking tongue shell 11 and the front end plate of the locking tongue shell 11. The tension spring in the announcement number CN222376238U is in a stretched state for a long time, which may easily lead to failure to return to the original position, resulting in an unexpected failure to unlock. The elastic member acting on the inner tongue body in this application is mostly in the reset state and has a long service life.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flat lock, comprising a bolt (1), two panels and a lock cylinder (4), characterized in that: The latch (1) includes a latch shell (11) and an inner tongue body that is slidably installed in the latch shell (11). The latch shell (11) is also provided with a reverse locking member (15) that works in cooperation with the rotating rod (41) of the lock cylinder (4). When the reverse locking member (15) rotates, it can lock or release the inner tongue body. The panel has a hinged flip plate, and the flip plate (21) has a toothed hook that can act on the inner tongue body; When the inner tongue is in the released state, pulling the flip plate will drive the inner tongue to move and retract inward to unlock it. After the flip plate is reset, the inner tongue will return to the extended and locked state.

2. The flat lock according to claim 1, characterized in that, The inner tongue body includes a locking tongue body (12) and a locking tongue drive arm (14) distributed at both ends. The locking tongue shell (11) has a clearance hole (111) through which the locking tongue drive arm (14) passes. The toothed hook drives the inner tongue body to slide by acting on the locking tongue drive arm (14). The anti-locking member (15) acts on the inner tongue body.

3. The flat bar lock according to claim 2, characterized in that The inner tongue body also includes a latch connecting frame (13) connected between the latch body (12) and the latch drive arm (14). The lock cylinder (4) passes through the cavity of the latch connecting frame (13). The anti-locking member (15) is located in the cavity of the latch connecting frame (13). The anti-locking member (15) includes an anti-locking arm (151). The latch connecting frame (13) has an anti-locking abutment part that works in cooperation with the anti-locking arm (151).

4. The flat bar lock according to claim 3, characterized in that The anti-locking component (15) also includes a reinforcing rib arm (152), the two ends of which are respectively slidably engaged with the sliding grooves (112) on the corresponding side walls of the locking tongue shell (11) to achieve stroke control.

5. The flat bar lock according to claim 1, characterized in that When the flip plate is in the reset state, it is flush with the outer surface of the panel.

6. The flat bar lock according to claim 1, characterized in that The flip plate also has a limiting arm, which abuts against the panel to limit the maximum flip angle of the flip plate.

7. The flat bar lock according to claim 6, characterized in that The panel has a U-shaped limiting groove, and the limiting arm is located in the limiting groove.

8. The flat bar lock according to claim 1, characterized in that A torsion spring is installed on the hinge shaft of the flip plate.

9. The flat bar lock according to claim 2, wherein The lock tongue drive arm (14) is parallel to the rotating rod (41) of the lock cylinder (4), and the hinge shaft of the flip plate is installed along the width direction of the flat lock.

10. The flat bar lock according to claim 1, characterized in that After the flip plate is reset, the inner tongue body automatically resets to the extended and locked state under the action of external elastic force.

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