Inside-door back locking buckle

Abstract

The utility model provides a back locking buckle inside a door, and relates to the technical field of locks. The device comprises a mounting plate fixedly connected to a door frame and located in a gap between the door frame and a door; the limiting plate is located indoors, and the first side edge of the limiting plate is rotationally connected to the first side edge of the mounting plate; the limiting groove is formed in the first side edge of the mounting plate, and the limiting plate is clamped into the limiting groove in the direction of the rotating axis. When the door is closed, the limiting plate is rotated towards the direction of the door and clamped into the limiting groove, at the moment, the limiting plate is close to the door, the limiting plate cannot rotate forwards or reversely, and after the door is forcibly pushed indoors by the outside, the limiting plate can rotate forwards or backwards under the action of the limiting plate clamped into the limiting groove, so that the limiting plate can rotate forwards or backwards. And the door cannot be continuously pushed indoors, and a pusher cannot touch the limiting plate, so that the indoor safety is ensured. On the whole, the anti-theft door is simple in structure and low in cost, foreign people are effectively prevented from forcibly pushing the door to enter the door, and the indoor safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to an inner-door reverse lock. Background Art

[0002] Door locks are often used in public places such as hotels to prevent door breakers from breaking in. Existing door locks are mostly ground-inserted, which can be easily broken by criminals from outside the door, resulting in poor security. Some door locks need to be fixed to the door frame and inside the door separately, which is complex in structure and high in production cost.

[0003] Therefore, there is an urgent need for a door inner lock that has a simple structure and low cost and can effectively prevent outsiders from forcibly pushing the door open. Utility Model Content

[0004] The purpose of the present invention is to provide a door lock that solves the technical problems of the prior art, such as being easily damaged and having a complex structure. The various technical effects that can be produced by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides an inner door anti-lock latch, comprising:

[0007] A mounting plate, the mounting plate being fixedly connected to the door frame and located in the gap between the door frame and the door;

[0008] a limiting plate, the limiting plate being located indoors, the first side edge of the limiting plate being rotatably connected to the first side edge of the mounting plate;

[0009] A limiting groove is provided at a first side edge of the mounting plate, and the limiting plate is inserted into the limiting groove along the direction of the rotation axis.

[0010] Preferably, it also includes:

[0011] An extension plate is arranged on the first side of the mounting plate, the extension plate is bent 360° to form a shaft sleeve, the limiting groove is opened at the connection between the extension plate and the mounting plate, and the first side of the limiting plate is rotatably matched with the shaft sleeve.

[0012] Preferably, it also includes:

[0013] The rotating shaft is arranged on the limiting plate and rotatably fitted in the shaft sleeve.

[0014] Preferably, it also includes:

[0015] An avoidance hole is provided on the limiting plate and forms the rotating shaft between the avoidance hole and the first side edge of the limiting plate, and the extension plate passes through the avoidance hole along the circumferential direction.

[0016] Preferably, it also includes:

[0017] A folded edge is provided on the second side of the limiting plate, and a folding direction of the folded edge is close to a side of the door frame.

[0018] Preferably, the avoidance holes, the rotating shaft, the shaft sleeve and the limiting grooves are respectively arranged in several groups along the axial direction of the rotating shaft.

[0019] Preferably, it also includes:

[0020] Mounting holes and screws: a plurality of mounting holes are provided on the mounting plate, and the mounting plate is fixedly connected to the door frame through the plurality of mounting holes and the screws.

[0021] Preferably, the limiting grooves are respectively provided on both sides of the same extension plate.

[0022] The technical solution provided by the present invention only requires the installation plate to be mounted on the door frame, and the limiting plate to be rotated in conjunction with the installation plate. When the door is closed, the limiting plate is rotated toward the door and snapped into the limiting groove. At this time, the limiting plate is close to the door and cannot be rotated forward or backward. When the door is forcibly pushed into the room by the outside, the limiting plate snapped into the limiting groove prevents the door from being pushed further into the room, and the pusher cannot touch the limiting plate, thereby ensuring the safety of the room. Overall, the present invention has a simple structure and low cost, effectively prevents outsiders from forcibly pushing the door open, and improves indoor safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the connection between the mounting plate and the limiting plate of the utility model;

[0025] Figure 2 This is a schematic diagram of the main viewing direction of the mounting plate and the limiting plate of the utility model;

[0026] Figure 3 This is a schematic diagram of the mounting plate and the limiting plate of the utility model when viewed from above;

[0027] Figure 4This is a schematic diagram of the state where the limit plate of the utility model is fitted with the door frame;

[0028] Figure 5 It is a schematic diagram of the state in which the limit plate of the utility model is clamped into the limit slot.

[0029] In the figure, 1, mounting plate; 2, mounting hole; 3, limit plate; 4, folding edge; 5, avoidance hole; 6, rotating shaft; 7, limit groove; 8, shaft sleeve; 9, door frame; 10, door. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0031] refer to Figure 1-5 The specific embodiment of the present invention provides a door inner locking latch, comprising:

[0032] Mounting plate 1, which is fixedly connected to the door frame 9 and located in the gap between the door frame 9 and the door 10;

[0033] The limiting plate 3 is located indoors, and a first side edge of the limiting plate 3 is rotatably connected to the first side edge of the mounting plate 1;

[0034] The limiting groove 7 is provided at the first side of the mounting plate 1 , and the limiting plate 3 is inserted into the limiting groove 7 along the direction of the rotation axis.

[0035] Internal door latches are commonly used in public places such as hotels to prevent door breakers from entering. Existing internal door latches are mostly ground-inserted, making them easily damaged by criminals from outside the door and less secure. Other internal door latches require separate attachment to the door frame and inside the door, resulting in complex structures and high production costs. In the present application, only the mounting plate 1 needs to be installed on the door frame 9, and the limiting plate 3 rotates in conjunction with the mounting plate 1. When the door 10 is closed, the limiting plate 3 is rotated toward the door 10 and snaps into the limiting groove 7. At this point, the limiting plate 3 is close to the door 10 and cannot rotate forward or backward. When the door 10 is forcibly pushed into the room by an outsider, the limiting plate 3, snapping into the limiting groove 7, prevents the door 10 from being pushed further into the room, and the pusher cannot reach the limiting plate 3, thus ensuring indoor safety. Overall, the present application has a simple structure and low cost, effectively preventing outsiders from forcibly pushing the door open and improving indoor safety.

[0036] Further optimization plans also include:

[0037] The extension plate is arranged on the first side of the mounting plate 1, the extension plate is bent 360° to form a sleeve 8, the limiting groove 7 is opened at the connection between the extension plate and the mounting plate 1, and the first side of the limiting plate 3 is rotatably matched with the sleeve 8.

[0038] The mounting plate 1 is integrally stamped and formed, and after the extension plate passes through the first side of the limiting plate 3, it is bent to form a shaft sleeve 8, so that the first side of the limiting plate 3 and the shaft sleeve 8 can rotate together, thereby realizing the rotational cooperation between the mounting plate 1 and the limiting plate 3.

[0039] Further optimization plans also include:

[0040] The rotating shaft 6 is arranged on the limiting plate 3 and rotatably fits in the shaft sleeve 8.

[0041] Further optimization plans also include:

[0042] The avoidance hole 5 is provided on the limiting plate 3 and forms a rotation axis 6 with the first side of the limiting plate 3 . The extension plate passes through the avoidance hole 5 along the circumferential direction.

[0043] The avoidance hole 5 can be a square hole. The extension plate is bent after passing through the avoidance hole 5. The extension plate forms the shaft sleeve 8 and wraps the rotating shaft 6 inside, so that the mounting plate 1 and the limiting plate 3 can rotate together through the shaft 6 and the shaft sleeve 8.

[0044] Further optimization plans also include:

[0045] The folded edge 4 is arranged on the second side of the limiting plate 3 , and the folding direction of the folded edge 4 is close to the side of the door frame 9 .

[0046] When the limit plate 3 is placed close to the inner side of the door frame 9, the limit plate 3 is fitted against the side wall of the door frame 9. In order to prevent the limit plate 3 from being unable to be quickly manually rotated due to the limit plate 3 being too fitted against the door frame 9, a folding edge 4 is provided to form a gap between the limit plate 3 and the door frame 9, so that fingers can easily be hooked into the gap to rotate the limit plate 3.

[0047] To further optimize the solution, several groups of avoidance holes 5 , rotating shaft 6 , bushings 8 and limiting grooves 7 are respectively arranged along the axial direction of the rotating shaft 6 .

[0048] This arrangement makes it easier to insert the limiting plate 3 into a plurality of limiting grooves 7 at the same time, thereby effectively improving the connection stability between the limiting plate 3 and the mounting plate 1 .

[0049] Further optimization plans also include:

[0050] Mounting holes 2 and screws: A plurality of mounting holes 2 are opened on the mounting plate 1, and the mounting plate 1 is fixedly connected to the door frame 9 through the plurality of mounting holes 2 and screws.

[0051] According to a further optimized solution, limiting grooves 7 are respectively provided on both sides of the same extension plate.

[0052] With this arrangement, no matter whether it is installed on a left-opening door or a right-opening door, it is only necessary to vertically reverse the direction of the limit plate 3 and the mounting plate 1, so that the present application can be applied to both left-opening doors and right-opening doors.

[0053] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used herein to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are intended only to facilitate the description of this application and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] It should also be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A door inner lock, characterized in that: include: A mounting plate (1), the mounting plate (1) being fixedly connected to the door frame (9) and located in a gap between the door frame (9) and the door (10); A limiting plate (3), the limiting plate (3) is located indoors, and a first side edge of the limiting plate (3) is rotatably connected to the first side edge of the mounting plate (1); A limiting groove (7), wherein the limiting groove (7) is provided at a first side edge of the mounting plate (1), and the limiting plate (3) is inserted into the limiting groove (7) along the direction of the rotation axis.

2. The door inner locking latch according to claim 1, characterized in that: Also includes: An extension plate, wherein the extension plate is arranged on a first side of the mounting plate (1), the extension plate is bent 360 degrees to form a shaft sleeve (8), the limiting groove (7) is provided at the connection between the extension plate and the mounting plate (1), and the first side of the limiting plate (3) is rotatably matched with the shaft sleeve (8).

3. The door inner locking latch according to claim 2, characterized in that: Also includes: A rotating shaft (6) is provided on the limiting plate (3) and is rotationally engaged in the shaft sleeve (8).

4. The door inner locking latch according to claim 3, characterized in that: Also includes: An avoidance hole (5) is provided on the limiting plate (3), and the rotating shaft (6) is formed between the avoidance hole (5) and the first side edge of the limiting plate (3), and the extension plate passes through the avoidance hole (5) along the circumferential direction.

5. The door inner locking latch according to claim 1, characterized in that: Also includes: A folded edge (4), the folded edge (4) is arranged on the second side of the limiting plate (3), and the folding direction of the folded edge (4) is close to the side of the door frame (9).

6. The door inner locking latch according to claim 4, characterized in that: The avoidance hole (5), the rotating shaft (6), the shaft sleeve (8) and the limiting groove (7) are respectively arranged in several groups along the axial direction of the rotating shaft (6).

7. The door inner locking latch according to claim 1, characterized in that: Also includes: Mounting holes (2) and screws; a plurality of mounting holes (2) are provided on the mounting plate (1); and the mounting plate (1) is fixedly connected to the door frame (9) via the plurality of mounting holes (2) and the screws.

8. The door inner locking latch according to claim 2, characterized in that: The limiting grooves (7) are respectively provided on both sides of the same extension plate.

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