Door latch structure

Abstract

The door catch structure comprises a door plate, door catch rods, a handle, two limiting rings and a connecting base, the two limiting rings are installed at the opposite positions of the front side and the rear side of the door plate respectively, the door catch rods are installed in the limiting rings in a sliding mode, the connecting base is connected with the two door catch rods, and the handle is connected with the door catch rods. A transverse moving hole corresponding to the connecting seat is formed in the door plate, and the handle is connected with the bottom of the latch rod; the door catch rods can be driven to slide in the limiting ring through the handle, the door catch rods can be inserted into a hole or a groove in the edge of a door frame or a door leaf to be fixed, under connection of the connecting base, synchronous movement of the inner door catch rod and the outer door catch rod can be achieved, the effect that the door can be opened inside and outside a classroom is achieved, and normal closing of the classroom door is not affected.

Description

Technical Field

[0001] This utility model relates to the field of door latch structures, and in particular to a door latch structure. Background Technology

[0002] A door latch typically refers to a device used to secure a door. These latches come in various designs and are usually made of a metal bar or similar material that can slide or rotate. One end of the latch is fixed to the door frame or wall, while the other end is designed to insert into a hole or slot in the edge of the door frame or door leaf. In school classrooms, existing door latches present a problem: once locked inside the classroom, they cannot be opened from the outside. This hinders immediate rescue efforts if students inside experience an emergency. Conversely, without a latch, the classroom cannot be closed. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the aforementioned problems in the prior art, this utility model provides a door latch structure.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A door latch structure includes a door panel, a door latch bar, a handle, a limiting ring, and a connecting seat;

[0008] Two limiting rings are provided, and the two limiting rings are respectively installed at opposite positions on the front and rear sides of the door panel;

[0009] The latch bar is slidably mounted within the limiting ring;

[0010] The connecting seat connects the two door latch rods, and the door panel has a transverse movable hole corresponding to the connecting seat;

[0011] The handle is connected to the bottom of the latch bar.

[0012] Preferably, it also includes an outer casing that surrounds the transverse movable hole, the connecting seat is slidably mounted in the outer casing, and the outer casing has a through hole corresponding to the latch bar.

[0013] Preferably, a fixing plate is installed on the door panel, and a lock hole for connecting to the lock is provided on the fixing plate, and a connection hole corresponding to the fixing plate is provided on the handle.

[0014] Preferably, the assembly also includes bearings, of which two bearings are provided and arranged symmetrically in the connecting seat, and the latch rod is connected to the connecting seat through the bearings.

[0015] Preferably, it also includes a drive gear and a driven gear, with the drive gear and driven gear respectively installed at one end of the tail of the two latch rods, and the drive gear meshing with the driven gear.

[0016] Preferably, it also includes a spring, which is sleeved on the latch bar, with one end of the spring connected to the connecting seat and the other end of the spring connected to the outer casing. Under the action of the spring, the latch bar retracts into the outer casing.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The handle can drive the door latch to slide within the limiting ring. The door latch can be inserted into a hole or slot on the edge of the door frame or door leaf for fixing. With the connection of the connecting seat, the inner and outer door latches can move synchronously, enabling the door to be opened from both inside and outside the classroom without affecting the normal closing of the classroom door.

[0020] 2. When the handle of the latch bar is connected to the fixed plate, the rotation of one latch bar, under the engagement of the driving gear and the cooperation of the driven gear, can cause the other latch bar to disengage from the fixed plate, thereby realizing the rotation control of the two latch bars, and then realizing the synchronous movement control of the two latch bars through the connecting seat;

[0021] 3. Under the action of the spring, the latch bar retracts into the outer casing, allowing the door panel to remain open. This also prevents the latch bar from colliding with the door frame when external force is suddenly applied to the door panel, thus protecting the latch bar and extending its service life. Attached Figure Description

[0022] Figure 1 A schematic diagram of a door latch structure;

[0023] Figure 2 A schematic diagram of the structure of the latch bar and the connecting seat;

[0024] Figure 3 This is a schematic diagram of the mounting structure of the outer casing;

[0025] Figure 4 This is a schematic diagram of the spring's mounting structure.

[0026] [Explanation of Labels in the Attached Image]

[0027] 1. Door panel;

[0028] 2. Limiting ring;

[0029] 3. Door latch bar;

[0030] 4. Connecting base;

[0031] 5. Bearings;

[0032] 6. Drive gear;

[0033] 7. Driven gear;

[0034] 8. Fixing plate;

[0035] 9. Handle;

[0036] 10. Outer shell;

[0037] 11. Spring. Detailed Implementation

[0038] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please refer to Figures 1 to 3 This utility model provides a door latch structure, including a door panel 1, a door latch bar 3, a handle 9, a limiting ring 2, and a connecting seat 4;

[0040] Two limiting rings 2 are provided, and the two limiting rings 2 are respectively installed at opposite positions on the front and rear sides of the door panel 1;

[0041] The latch bar 3 is slidably installed within the limiting ring 2;

[0042] The connecting seat 4 connects the two door latch rods 3, and the door panel 1 has a transverse movable hole corresponding to the connecting seat 4;

[0043] The handle 9 is connected to the bottom of the latch bar 3;

[0044] In use, the handle 9 can drive the latch bar 3 to slide within the limiting ring 2. The latch bar 3 can be inserted into a hole or groove on the edge of the door frame or door leaf to achieve fixation. With the connection of the connecting seat 4, the inner and outer latch bars 3 can move synchronously, enabling the door to be opened from both inside and outside the classroom without affecting the normal closing of the classroom door.

[0045] In this embodiment, an outer shell 10 is also included, which surrounds the transverse movable hole. The connecting seat 4 is slidably installed inside the outer shell 10. The outer shell 10 has through holes corresponding to the door latch 3. The outer shell 10 not only ensures the overall aesthetics of the door panel 1, but also provides a slide rail for the movement of the connecting seat 4.

[0046] In this embodiment, a fixing plate 8 is installed on the door panel 1. The fixing plate 8 has a lock hole for connecting with a lock. The handle 9 has a connection hole corresponding to the fixing plate 8. When in use, when the handle 9 moves to the fixing plate 8, it connects with the fixing plate 8 through the connection hole, and then the lock hole is locked by the lock to lock the door panel 1.

[0047] In this embodiment, there are also bearings 5. Two bearings 5 ​​are provided and are arranged symmetrically in the connecting seat 4. The latch rod 3 is connected to the connecting seat 4 through the bearings 5. It also includes a driving gear 6 and a driven gear 7. The driving gear 6 and the driven gear 7 are respectively installed at one end of the tail of the two latch rods 3, and the driving gear 6 meshes with the driven gear 7.

[0048] When the handle 9 of the latch bar 3 is connected to the fixed plate 8, the rotation of one of the latch bars 3, under the engagement of the driving gear 6 and the cooperation of the driven gear 7, can cause the other latch bar 3 to disengage from the fixed plate 8, thereby realizing the rotation control of the two latch bars 3, and then realizing the synchronous movement control of the two latch bars 3 through the connecting seat 4.

[0049] refer to Figure 4 In this embodiment, a spring 11 is also included. The spring 11 is sleeved on the latch bar 3. One end of the spring 11 is connected to the connecting seat 4, and the other end of the spring 11 is connected to the outer shell 10. Under the action of the spring 11, the latch bar 3 retracts into the outer shell 10, so that the door panel 1 can maintain the normally open state. At the same time, it avoids the problem of the latch bar 3 colliding with the door frame when external force is suddenly applied to the door panel 1, thus protecting the latch bar 3 and extending its service life.

[0050] The working principle of this utility model is as follows:

[0051] 1. The handle 9 can drive the door latch 3 to slide within the limiting ring 2. The door latch 3 can be inserted into a hole or groove on the edge of the door frame or door leaf to achieve fixation. With the connection of the connecting seat 4, the inner and outer door latches 3 can move synchronously, so that the door can be opened from both inside and outside the classroom without affecting the normal closing of the classroom door.

[0052] 2. When the handle 9 of the latch bar 3 is connected to the fixing plate 8, the rotation of one of the latch bars 3, under the engagement of the driving gear 6 and the cooperation of the driven gear 7, can cause the other latch bar 3 to disengage from the fixing plate 8, thereby realizing the rotation control of the two latch bars 3, and then realizing the synchronous movement control of the two latch bars 3 through the connecting seat 4;

[0053] 3. Under the action of the spring 11, the latch bar 3 retracts into the outer shell 10, so that the door panel 1 can maintain the normally open state. At the same time, it avoids the problem of the latch bar 3 colliding with the door frame when external force is suddenly applied to the door panel 1, thus protecting the latch bar 3 and extending its service life.

[0054] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0055] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A latch structure, characterized in that, Includes door panel, door latch bar, handle, limit ring, and connecting seat; Two limiting rings are provided, and the two limiting rings are respectively installed at opposite positions on the front and rear sides of the door panel; The latch bar is slidably mounted within the limiting ring; The connecting seat connects the two door latch rods, and the door panel has a transverse movable hole corresponding to the connecting seat; The handle is connected to the bottom of the latch bar.

2. The latch structure according to claim 1, characterized in that, It also includes an outer casing that surrounds the transverse movable hole, the connecting seat being slidably mounted in the outer casing, and the outer casing having a through hole corresponding to the latch bar.

3. A latch structure according to claim 1, characterized in that, A fixing plate is installed on the door panel, and a lock hole for connecting to the lock is opened on the fixing plate. A connection hole corresponding to the fixing plate is opened on the handle.

4. A latch structure according to claim 3, characterized in that, It also includes bearings, two of which are arranged symmetrically in the connecting seat, and the latch rod is connected to the connecting seat through the bearings.

5. A latch structure according to claim 4, characterized in that, It also includes a drive gear and a driven gear, with the drive gear and driven gear respectively installed at one end of the tail of the two latch rods, and the drive gear meshing with the driven gear.

6. A latch structure according to claim 2, characterized in that, It also includes a spring, which is sleeved on the latch bar. One end of the spring is connected to the connecting seat, and the other end of the spring is connected to the outer casing. Under the action of the spring, the latch bar retracts into the outer casing.

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