Lock body for courtyard door

By designing a lock body for courtyard doors that includes an oblique tongue mechanism and a provoking mechanism, the problem of the courtyard door requiring a password and a separate lock body inside and outside is solved, and independent unlocking and locking functions are realized to meet the safety needs of courtyard doors.

CN222949635UActive Publication Date: 2025-06-06HUIZHOU MINGHAO HOUSEHOLD PROD CO LTD
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Patent Information

Application Number
CN202421460408.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-25
Publication Date
2025-06-06
Estimated Expiration
2034-06-25

AI Technical Summary

Technical Problem

In the design of the courtyard door, there must be passwords on the inside and outside of the lock end, and a lock body with separate inside and outside needs to be realized to meet the unlocking and locking needs of the courtyard door.

Method used

A lock body for courtyard doors is designed, including a housing assembly, an oblique tongue mechanism, a main lock tongue mechanism, a first provocation mechanism, a second provocation mechanism and a control panel. Through the cooperation of the first provoking mechanism, the second provoking mechanism and the first moving column, the main lock is removed and plugged, and finally the main lock tongue is operated, and the lock opening and locking actions are completed.

Benefits of technology

It realizes separation of the inside and the outside, and both have independent locking and locking functions, effectively matching the lock body for courtyard doors and meeting the safety needs of courtyard doors.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN222949635U_ABST
    Figure CN222949635U_ABST
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Abstract

The utility model discloses a lock body for a courtyard door, and relates to the technical field of locks. An accommodating space is formed in the shell assembly; a latch bolt mechanism, a main spring bolt mechanism, a first picking mechanism, a second picking mechanism and a control panel are arranged in the accommodating space; a first shifting part is formed on the first latch bolt shifting piece, a second shifting part is arranged on the second latch bolt shifting piece, and the first shifting part and the second shifting part are suitable for rotating clockwise to enable the latch bolt mechanism to retract in the first direction; a locking groove is formed in the main spring bolt, a locking block matched with the locking groove is arranged on the control panel, the control panel is suitable for moving in the second direction so that the locking block can stretch out of or be clamped into the locking groove, and the first poking mechanism and the second poking mechanism are suitable for driving the control panel to move in the second direction when rotating; the lock provided by the utility model can realize internal and external separation, has independent unlocking and locking functions, and can be effectively matched with a lock body for a courtyard door.
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Description

Technical Field

[0001] The present application relates to the field of locks, and in particular to a lock body for a courtyard door. Background Art

[0002] With the popularization of intelligent door locks, courtyard doors are also equipped with smart locks or mechanical password locks, which can be unlocked by swiping cards, passwords, fingerprints, face recognition, etc. The courtyard door is different from the traditional entrance door. The traditional entrance door lock adopts a double-fast double-active design. The double-fast double-active design does not require password input and the door lock can be quickly opened from inside the door. In the design of the courtyard door, it is necessary to design both internal and external passwords at the lock end. For this, a special lock body for the courtyard door that can realize internal and external separation is required. Utility Model Content

[0003] The purpose of this application is to provide a lock body for a courtyard door to solve at least one of the above-mentioned technical problems.

[0004] In order to solve the above technical problems, the present application provides a lock body for a courtyard door, comprising a housing component, wherein the housing component is formed with an accommodating space;

[0005] A tilting bolt mechanism, a main locking bolt mechanism, a first provoking mechanism, a second provoking mechanism and a control panel are arranged in the accommodating space;

[0006] The first provoking mechanism comprises a first provoking member and a first oblique tongue pick sleeved on the first provoking member, and the second provoking mechanism comprises a second provoking member and a second oblique tongue pick sleeved on the second provoking member, and the first provoking member and the second provoking member are both provided with a square shaft core and are coaxially arranged adjacent to each other;

[0007] A first toggle portion is formed on the first oblique tongue paddle, and a second toggle portion is formed on the second oblique tongue paddle, and the first toggle portion and the second toggle portion are suitable for rotating clockwise to retract the oblique tongue mechanism along a first direction;

[0008] The first provoking mechanism is extended along its radial direction to form a first clamping portion and a second clamping portion, and the second provoking mechanism is extended along its radial direction to form a third clamping portion and a fourth clamping portion; the main lock tongue mechanism includes a main lock plug and a main lock tongue; the main lock plug and pull shell is rotatably arranged on the shell assembly, and one end of the main lock plug and pull shell is provided with a first moving column, and the other end is connected to the main lock tongue, the first clamping portion and the third clamping portion are suitable for rotating counterclockwise and acting on the first moving column to drive the main lock plug and pull clockwise, and the main lock plug and pull clockwise rotation is suitable for driving the main lock tongue to extend along the first direction;

[0009] A locking groove is provided on the main lock tongue, a locking block adapted to the locking groove is provided on the control plate, the control plate is adapted to move along the second direction so that the locking block extends out or is inserted into the locking groove, and the first provoking mechanism and the second provoking mechanism are adapted to drive the control plate to move along the second direction when rotating;

[0010] The first direction and the second direction are perpendicular to each other.

[0011] Preferably, the housing assembly comprises a lock shell, a cover plate and a mounting plate; the lock shell is fixedly connected to the mounting plate, and the cover plate is covered on the lock shell and cooperates with the mounting plate to form the accommodating space.

[0012] Preferably, it further comprises a transmission sheet; a connecting portion is provided on the first oblique tongue paddle; and a first fixing column is provided on the main lock tongue;

[0013] One end of the transmission sheet can be rotatably connected to the connecting portion, and the other end can be rotatably connected to the first fixing column.

[0014] Preferably, a first locking block and a second fixing column are provided on the inner wall of the lock housing, and a second locking block is provided on the control panel;

[0015] A first torsion spring is provided on the second fixing column, one end of the first torsion spring abuts against the first positioning block, and the other end of the first torsion spring abuts against the second positioning block to drive the control board to reset along the second direction.

[0016] Preferably, the oblique tongue mechanism comprises an oblique tongue body, a connecting shaft, an abutment plate and a second torsion spring, wherein the connecting shaft connects the abutment plate and the oblique tongue body;

[0017] A third fixing column is provided on the inner wall of the lock housing, one end of the second torsion spring abuts against the lock housing, and the other end abuts against the abutment plate to drive the abutment plate to return to the first direction;

[0018] The first toggle portion and the second toggle portion are suitable for acting on the abutment plate to drive the inclined tongue body to retract along a first direction.

[0019] Preferably, a fifth fixing column is provided on the lock housing, a first guide groove is formed on the main lock tongue along a first direction, and the fifth fixing column extends into the first guide groove and cooperates with the first guide groove to limit the main lock tongue.

[0020] Preferably, a fourth fixing column is provided on the main lock tongue, and further comprises a third torsion spring;

[0021] One end of the third torsion spring is connected to the fourth fixing column, and the other end is connected to the fifth fixing column to drive the main locking tongue to reset.

[0022] Preferably, a second guide groove is provided on the control board along the second direction, and the fifth fixing column extends into the second guide groove and cooperates in the second guide groove to limit the control board.

[0023] Preferably, a sixth fixing column is provided on the lock housing, and the main lock plug-in housing is rotatably disposed on the sixth fixing column.

[0024] Preferably, a sliding groove is formed on the transmission plate, and the sliding groove is slidably matched with the first fixing column.

[0025] Compared with the prior art, the beneficial effect of the present application lies in that: in this scheme, the first prodding mechanism and the first oblique tongue paddle are equipped with a square shaft core, and the second prodding mechanism and the second oblique tongue paddle are equipped with a square shaft core, and the rotation of the main lock insertion and pulling is realized through the cooperation of the first prodding mechanism, the second prodding mechanism and the first movable column, and finally the movement of the main lock tongue is realized to complete the unlocking and locking actions; the internal and external separation can be realized, and both have independent unlocking and locking functions, which can effectively match the lock body for the courtyard door. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the internal structure of one embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the internal structure of one embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of the explosion structure of one embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of the internal structure of one embodiment of the present application;

[0032] Figure 6 It is a schematic diagram of the internal structure of one embodiment of the present application;

[0033] Figure 7 It is a partial structural diagram of one embodiment of the present application.

[0034] Among them: 11, lock housing; 12, cover plate; 13, mounting plate; 21, oblique tongue body; 22, connecting shaft; 23, abutment plate; 30, main lock tongue; 31, locking groove; 32, first guide groove; 33, main lock plug; 331, first moving column; 41, first provoking member; 411, first clamping part; 412, second clamping part; 42, second provoking member; 421, third clamping part; 422, fourth clamping part; 43, first oblique tongue paddle; 431, first toggle 44, second oblique tongue paddle; 441, second toggle part; 45, square axis core; 50, control board; 51, locking block; 52, first blocking block; 53, second blocking block; 54, second guide groove; 60, transmission plate; 61, sliding groove; 71, first fixed column; 72, second fixed column; 73, third fixed column; 74, fourth fixed column; 75, fifth fixed column; 76, sixth fixed column; 81, first torsion spring; 82, second torsion spring; 83, third torsion spring. DETAILED DESCRIPTION

[0035] The following will disclose multiple embodiments of the present application with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present application. In other words, in some embodiments of the present application, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0036] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, in the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0038] In order to further understand the content, features and effects of the utility model of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0039] Example

[0040] With the popularization of intelligent door locks, courtyard doors are also equipped with smart locks or mechanical password locks, which can be unlocked by swiping cards, passwords, fingerprints, face recognition, etc. The courtyard door is different from the traditional entrance door. The traditional entrance door lock adopts a double-fast double-active design. The double-fast double-active design does not require entering a password, and the door lock can be quickly opened from inside the door. In the design of the courtyard door, it is necessary to design both the inside and outside of the lock end. For this, a special lock body for the courtyard door that can realize the separation of inside and outside is required; in order to solve the above technical problems, this embodiment provides the following technical solutions:

[0041] Specifically, it includes a housing component, wherein the housing component is formed with a containing space;

[0042] Specifically, a latch bolt mechanism, a main latch bolt 30 mechanism, a first provoking mechanism, a second provoking mechanism and a control panel 50 are arranged in the accommodation space;

[0043] Furthermore, the first provoking mechanism includes a first provoking member 41 and a first oblique tongue paddle 43 sleeved on the first provoking member 41, and the second provoking mechanism includes a second provoking member 42 and a second oblique tongue paddle 44 sleeved on the second provoking member 42, and the first provoking member 41 and the second provoking member 42 are both provided with a square shaft core 45 and are coaxially arranged adjacent to each other;

[0044] Specifically, a first toggle portion 431 is formed on the first oblique tongue paddle 43, and a second toggle portion 441 is formed on the second oblique tongue paddle 44. The first toggle portion 431 and the second toggle portion 441 are suitable for rotating clockwise to retract the oblique tongue mechanism along the first direction.

[0045] Specifically, the first provocation mechanism is extended along its radial direction to form a first clamping portion 411 and a second clamping portion 412, and the second provocation mechanism is extended along its radial direction to form a third clamping portion 421 and a fourth clamping portion 422; the main lock tongue 30 mechanism includes a main lock plug 33 and a main lock tongue 30; the main lock plug 33 is rotatably arranged on the housing assembly, and one end of the main lock plug 33 is provided with a first moving column 331, and the other end is connected to the main lock tongue 30, the first clamping portion 411 and the third clamping portion 421 are suitable for rotating counterclockwise and acting on the first moving column 331 to drive the main lock plug 33 to rotate clockwise, and the main lock plug 33 rotates clockwise to drive the main lock tongue 30 to extend along the first direction;

[0046] Furthermore, a locking groove 31 is provided on the main lock tongue 30, and a locking block 51 adapted to the locking groove 31 is provided on the control plate 50. The control plate 50 is adapted to move along the second direction so that the locking block 51 extends out or is inserted into the locking groove 31. When the first provoking mechanism and the second provoking mechanism rotate, they are adapted to drive the control plate 50 to move along the second direction.

[0047] The first direction and the second direction are perpendicular to each other.

[0048] In the above scheme, this scheme effectively realizes the separation of the inside and outside of the lock body; taking the first provoking mechanism as an example, the square shaft core 45 connected to the first provoking member 41 rotates, and when the square shaft core 45 rotates clockwise, it drives the first oblique tongue paddle 43 to rotate clockwise, and the first oblique tongue paddle 43 drives the oblique tongue mechanism to retract along the first direction through the first driving portion 431 to achieve unlocking; when the square shaft core 45 connected to the first provoking mechanism rotates counterclockwise, the first provoking mechanism follows to achieve counterclockwise rotation, and the second locking portion 412 of the first provoking mechanism acts on the control panel 50, driving the control plate 50 to move along the second direction, which can be understood as the vertical direction. The control plate 50 moves the other locking block 51 of the shell in the vertical direction away from the locking groove 31 of the main lock tongue 30, so that the moving path of the main lock tongue 30 in the first direction will not be blocked. While the first provoking mechanism rotates counterclockwise, it acts on the first moving column 331 through the first locking portion 411 to drive the main lock puller 33 to rotate clockwise. The clockwise rotation of the main lock puller 33 further drives the main lock tongue 30 to extend along the first direction, thereby realizing the locking of the main lock tongue 30.

[0049] Further, taking the second prodding mechanism as an example, when the square shaft core 45 connected to the second oblique tongue paddle 44 rotates, it will drive the second oblique tongue paddle 44 to rotate; taking clockwise rotation as an example, the second oblique tongue paddle 44 follows the square shaft core 45 to rotate clockwise, thereby driving the oblique tongue mechanism to retract in the first direction through the second driving portion 441 to achieve unlocking; when the square shaft core 45 rotates counterclockwise, it drives the second prodding mechanism to rotate counterclockwise, and the second prodding mechanism rotates counterclockwise through the fourth locking portion 422 to drive the control plate 50 to move in the second direction, which can be further understood as moving in the vertical direction, so that the locking block 51 leaves the locking slot 31, and the main lock tongue 30 will not be blocked in the first direction. While the second prodding mechanism rotates counterclockwise, the third locking portion 421 drives the main lock puller 33 to rotate clockwise through the first moving column 331, and the main lock puller 33 rotates clockwise to drive the main lock tongue 30 to extend in the first direction to achieve locking.

[0050] In this solution, the first provoking mechanism and the first oblique tongue paddle 43 are equipped with a square shaft core 45, and the second provoking mechanism and the second oblique tongue paddle 44 are equipped with a square shaft core 45. The first provoking mechanism, the second provoking mechanism and the first movable column 331 cooperate to realize the rotation of the main lock pull-out 33, and finally realize the movement of the main lock tongue 30, completing the unlocking and locking actions; the internal and external separation can be realized, and both have independent unlocking and locking functions, which can effectively match the lock body for the courtyard door.

[0051] For details, see Figure 1 and Figure 4The housing assembly includes a lock shell 11, a cover plate 12 and a mounting plate 13; the lock shell 11 is fixedly connected to the mounting plate 13, the cover plate 12 is covered on the lock shell 11 and cooperates with the mounting plate 13 to form a accommodating space; wherein the mounting plate 13 can be assembled on the door body to fix the lock on the door body.

[0052] For details, see Figure 2-4 , further comprising a transmission sheet 60; a connecting portion is provided on the first oblique tongue paddle 43; a first fixing column 71 is provided on the main lock tongue 30;

[0053] Further, one end of the transmission sheet 60 may be rotatably connected to the connection portion, and the other end may be rotatably connected to the first fixing column 71;

[0054] In the above solution, the linkage relationship between the first oblique tongue paddle 43 and the main lock tongue 30 can be achieved by providing the transmission piece 60 .

[0055] Furthermore, a sliding groove 61 is formed on the transmission sheet 60 , and the sliding groove 61 is slidably matched with the first fixing column 71 .

[0056] Specifically, a first locking block 52 and a second fixing column 72 are provided on the inner wall of the lock housing 11, and a second locking block 53 is provided on the control panel 50;

[0057] A first torsion spring 81 is disposed on the second fixing column 72. One end of the first torsion spring 81 abuts against the first positioning block 52, and the other end abuts against the second positioning block 53 to drive the control board 50 to return to the second direction.

[0058] In the above scheme, when the control plate 50 moves along the first direction and drives the first torsion spring 81 to move, the first torsion spring 81 stores elastic potential energy. After the external force is lost, the first torsion spring 81 releases the elastic potential energy to drive the control plate 50 to reset, and the locking block 51 is snapped into the locking groove 31 of the main lock tongue 30.

[0059] Specifically, the oblique tongue mechanism includes an oblique tongue body 21, a connecting shaft 22, an abutment plate 23 and a second torsion spring 82, wherein the connecting shaft 22 connects the abutment plate 23 and the oblique tongue body 21;

[0060] A third fixing column 73 is provided on the inner wall of the lock housing 11, one end of the second torsion spring 82 abuts against the lock housing 11, and the other end abuts against the abutting plate 23 to drive the abutting plate 23 to return to the first direction;

[0061] The first shifting portion 431 and the second shifting portion 441 are adapted to act on the abutting plate 23 to drive the inclined tongue body 21 to retract along the first direction;

[0062] In the above scheme, the first toggle portion 431 and the second toggle portion can abut against the abutment plate 23. When they rotate clockwise, they can drive the abutment plate 23 to move along the first direction, specifically to retract along the first direction, and then drive the inclined tongue body 21 to retract through the connecting shaft 22 to achieve unlocking; and in this process, it will drive the second torsion spring 82 to compress, and then store elastic potential energy. When the first toggle portion 431 or the second toggle portion is lost, the second torsion spring 82 releases the elastic potential energy, prompting the abutment plate 23 to reset and then prompting the inclined tongue body 21 to reset.

[0063] For details, see Figure 2-4 A fifth fixing column 75 is provided on the lock housing 11, and a first guide groove 32 is formed on the main lock tongue 30 along the first direction. The fifth fixing column 75 extends into the first guide groove 32 and cooperates with the first guide groove 32 to limit the main lock tongue 30;

[0064] In the above solution, the fifth fixing column 75 cooperates with the first guide groove 32 to limit the main lock tongue 30, so that the main lock tongue 30 can stably move along the first direction.

[0065] Specifically, a fourth fixing column 74 is provided on the main locking tongue 30, and a third torsion spring 83 is also included;

[0066] Furthermore, one end of the third torsion spring 83 is connected to the fourth fixing post 74, and the other end is connected to the fifth fixing post 75 to drive the main locking tongue 30 to reset;

[0067] In the above solution, the third torsion spring 83 can cause the main locking tongue 30 to reset along the first direction.

[0068] Specifically, a second guide groove 54 is formed on the control board 50 along the second direction, and the fifth fixing column 75 extends into the second guide groove 54 and cooperates with the second guide groove 54 to limit the control board 50;

[0069] In the above solution, the second guide groove 54 cooperates with the fifth fixing column 75 to limit the movement of the control board 50, so that the control board 50 can move stably along the second direction.

[0070] Specifically, a sixth fixing column 76 is provided on the lock housing 11 , and the main lock plug 33 is rotatably disposed on the sixth fixing column 76 .

[0071] The above description is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application are within the scope of the technical solution of the present application.

Claims

1. A lock body for a courtyard door, characterized in that: include A housing component, wherein the housing component is formed with a receiving space; A tilting bolt mechanism, a main locking bolt mechanism, a first provoking mechanism, a second provoking mechanism and a control panel are arranged in the accommodating space; The first provoking mechanism comprises a first provoking member and a first oblique tongue pick sleeved on the first provoking member, and the second provoking mechanism comprises a second provoking member and a second oblique tongue pick sleeved on the second provoking member, and the first provoking member and the second provoking member are both provided with a square shaft core and are coaxially arranged adjacent to each other; A first toggle portion is formed on the first oblique tongue paddle, and a second toggle portion is formed on the second oblique tongue paddle, and the first toggle portion and the second toggle portion are suitable for rotating clockwise to retract the oblique tongue mechanism along a first direction; The first provoking mechanism is extended along its radial direction to form a first clamping portion and a second clamping portion, and the second provoking mechanism is extended along its radial direction to form a third clamping portion and a fourth clamping portion; the main lock tongue mechanism includes a main lock plug and a main lock tongue; the main lock plug and pull shell is rotatably arranged on the shell assembly, and one end of the main lock plug and pull shell is provided with a first moving column, and the other end is connected to the main lock tongue, the first clamping portion and the third clamping portion are suitable for rotating counterclockwise and acting on the first moving column to drive the main lock plug and pull clockwise, and the main lock plug and pull clockwise rotation is suitable for driving the main lock tongue to extend along the first direction; A locking groove is provided on the main lock tongue, a locking block adapted to the locking groove is provided on the control plate, the control plate is adapted to move along the second direction so that the locking block extends out or is inserted into the locking groove, and the first provoking mechanism and the second provoking mechanism are adapted to drive the control plate to move along the second direction when rotating; The first direction and the second direction are perpendicular to each other.

2. The lock body for a courtyard door according to claim 1, characterized in that: The housing assembly comprises a lock shell, a cover plate and a mounting plate; the lock shell is fixedly connected to the mounting plate, and the cover plate is disposed on the lock shell and cooperates with the mounting plate to form the accommodating space.

3. The lock body for a courtyard door according to claim 2, characterized in that: It also includes a transmission sheet; a connecting portion is provided on the first oblique tongue paddle; and a first fixing column is provided on the main lock tongue; One end of the transmission sheet can be rotatably connected to the connecting portion, and the other end can be rotatably connected to the first fixing column.

4. The lock body for a courtyard door according to claim 2, characterized in that: A first locking block and a second fixing column are provided on the inner wall of the lock housing, and a second locking block is provided on the control panel; A first torsion spring is provided on the second fixing column, one end of the first torsion spring abuts against the first positioning block, and the other end of the first torsion spring abuts against the second positioning block to drive the control board to reset along the second direction.

5. The lock body for a courtyard door according to claim 2, characterized in that: The inclined tongue mechanism comprises an inclined tongue body, a connecting shaft, an abutting plate and a second torsion spring, wherein the connecting shaft connects the abutting plate and the inclined tongue body; A third fixing column is provided on the inner wall of the lock housing, one end of the second torsion spring abuts against the lock housing, and the other end abuts against the abutment plate to drive the abutment plate to return to the first direction; The first toggle portion and the second toggle portion are suitable for acting on the abutment plate to drive the inclined tongue body to retract along a first direction.

6. The lock body for a courtyard door according to claim 2, characterized in that: A fifth fixing column is provided on the lock housing, a first guide groove is formed on the main lock tongue along a first direction, and the fifth fixing column extends into the first guide groove and cooperates with the first guide groove to limit the main lock tongue.

7. The lock body for a courtyard door according to claim 6, characterized in that: A fourth fixing column is provided on the main lock tongue, and also includes a third torsion spring; One end of the third torsion spring is connected to the fourth fixing column, and the other end is connected to the fifth fixing column to drive the main locking tongue to reset.

8. The lock body for a courtyard door according to claim 6, characterized in that: A second guide groove is provided on the control board along a second direction, and the fifth fixing column extends into the second guide groove and cooperates with the second guide groove to limit the control board.

9. The lock body for a courtyard door according to claim 2, characterized in that: A sixth fixing column is arranged on the lock shell, and the main lock plug-in shell is rotatably arranged on the sixth fixing column.

10. The lock body for a courtyard door according to claim 3, characterized in that: A sliding groove is formed on the transmission sheet, and the sliding groove is slidably matched with the first fixing column.