Self-releasing lock

Abstract

The utility model relates to lock technology field discloses a self -ejection lock from, including lock box and its inside bevel tongue subassembly, square tongue subassembly, trigger subassembly and prevent false touch subassembly, trigger subassembly links with bevel tongue subassembly and square tongue subassembly respectively, prevent false touch subassembly includes: safety tongue, slide in the lock tongue hole of lock box lateral wall, safety connecting rod, slide in the lock box, link with safety tongue, safety spring, be located in the lock box, have the force of outside lock box to safety connecting rod, safety lever, rotation is established in the lock box, one end links with safety connecting rod, safety push rod, slide in the lock box, one end links with the other end of safety lever, the other end connects on trigger subassembly, wherein safety tongue slides to outside lock box, safety connecting rod drives safety lever to rotate, safety push rod slides, in turn makes trigger subassembly to remove with bevel tongue subassembly's link. The self -ejection lock is applied to the door, under the door opening state, even if user false touch bevel tongue, also can not trigger square tongue to pop out.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a self-springing lock. Background Technology

[0002] The main feature of a self-locking mechanism is that the latch automatically extends and locks after the door is closed. The lock body includes a bolt assembly, a square bolt assembly, and a trigger assembly. During the locking process, when the bolt retracts into the lock housing and then extends back into the latch box, the trigger assembly is activated to release the square bolt assembly, allowing it to extend and lock. Furthermore, after unlocking, the lock body must remain in the unlocked state; only the bolt should extend from the lock housing, while the square bolt remains locked. Currently, self-locking mechanisms have the following problem: accidentally activating the bolt while the door is open may trigger the square bolt to extend, affecting the user experience. Utility Model Content

[0003] This utility model was made to solve the above-mentioned technical problems. Its purpose is to provide a self-springing lock that, even if the user accidentally touches the latch in the unlocked state, the square latch will not be triggered to pop out.

[0004] According to one embodiment of this utility model, a self-locking mechanism is provided, including a lock housing and a latch assembly, a square latch assembly, a trigger assembly, and an anti-accidental activation assembly within it. The trigger assembly is linked to both the latch assembly and the square latch assembly. The anti-accidental activation assembly includes: a safety latch slidably disposed in a latch hole on the side wall of the lock housing; a safety linkage slidably disposed within the lock housing and connected to the safety latch; a safety spring disposed within the lock housing, applying a force toward the outside of the lock housing to the safety linkage; a safety lever rotatably disposed within the lock housing, one end of which is connected to the safety linkage; and a safety push rod slidably disposed within the lock housing, one end of which is connected to the other end of the safety lever, and the other end of which is connected to the trigger assembly. When the safety latch slides outside the lock housing, the safety linkage drives the safety lever to rotate, and the safety push rod slides, thereby disengaging the trigger assembly from the latch assembly. When the safety latch slides inside the lock housing, the safety push rod slides in the opposite direction, thereby restoring the linkage between the trigger assembly and the latch assembly.

[0005] In one embodiment, the latch assembly includes a latch, a first connecting rod, a fixing block, a first spring, and a slider. The fixing block is fixed inside the lock housing, the first connecting rod is slidably disposed within the fixing block, the latch and the slider are respectively connected to the two ends of the first connecting rod, the slider is slidably disposed inside the lock housing, and the first spring applies an outward force to the latch. The square latch assembly includes a square latch, a second spring, and a square latch plate slidably disposed inside the lock housing. A locking groove is formed on the side of the square latch plate, and the second spring applies an outward force to the square latch plate. The trigger assembly includes a first lever, a second lever, a locking plate, and a third lever. A spring and a locking plate are rotatably disposed within the lock housing. One side of the locking plate has a locking pin that can be embedded in the locking groove, and the other side has a second lever rotatably disposed thereon. One end of the second lever abuts against the side of the locking plate, and the other end has a first lever rotatably disposed thereon. The side of the first lever near the latch assembly has a toggle part, and the other side is connected to a third spring. The third spring applies a force to the first lever, causing the side of the toggle part to abut against the fixed block. When the front end of the toggle part is between the slider and the fixed block, the front end of the toggle part extends into the path of the slider sliding outward.

[0006] In one embodiment, the safety linkage is provided with a baffle, which is located on the side of the safety lever away from the safety tongue; the safety push rod is vertically disposed in the lock box; the upper end of the safety push rod is connected to the other side of the first lever.

[0007] In one embodiment, the safety linkage is provided with two baffles located on both sides of one end of the safety lever; the safety push rod is provided with two baffles located on both sides of the other end of the safety lever, and the upper end of the safety push rod is connected to the other side of the first lever.

[0008] In one embodiment, the lock box is provided with a fourth spring, which applies a force to the locking piece, causing the locking pin to be embedded in the locking groove.

[0009] In one embodiment, an inclined first groove is formed on the square tongue plate; a third lever is rotatably provided inside the lock box, and a first lever that slides in the first groove is formed on the third lever; the second spring is a torsion spring, one end of which is fixed inside the lock box, and the other end abuts against the third lever.

[0010] In one embodiment, the second paddle has a limiting portion that is opposite to the fixing block.

[0011] In one embodiment, one side of the square tongue plate is an inclined guide surface, which is located on the side of the locking groove away from the square tongue. When the square tongue extends out of the lock box, the guide surface is opposite to the locking post.

[0012] In one embodiment, the first spring is a compression spring, which is sleeved on the first connecting rod, with its two ends abutting against the fixed block and the oblique tongue, respectively.

[0013] As one embodiment, the safety push rod has a strip-shaped sliding hole along its own length direction, and the lock box has a limiting rod assembled in the sliding hole.

[0014] Based on the above description and practical application, the self-locking mechanism of this invention incorporates an anti-accidental-touch component to control the position of the triggering component. When applied to a door lock, if the door is open, the safety latch in the anti-accidental-touch component extends outside the lock housing. The safety linkage rotates the safety lever, causing the safety push rod to slide to one side, thereby disengaging the triggering component from the latch assembly. In this case, even if the user accidentally touches the latch assembly, it will not trigger the bolt assembly to operate and lock the door. During normal door closing, the safety latch and the bolt are simultaneously pressed into the lock housing. At this time, the safety linkage rotates the safety lever, causing the safety push rod to slide in the opposite direction, thereby restoring the linkage between the triggering component and the latch assembly. After the door is closed, when the bolt extends out of the lock housing, the linkage between the latch assembly, the triggering component, and the bolt assembly is restored, enabling the bolt assembly to operate and lock the door. Therefore, this self-locking lock not only automatically locks when the door is closed, but also prevents the latch from popping out even if the user accidentally touches the latch while the door is open, making it convenient and safe to use. Attached Figure Description

[0015] Figures 1 to 5 This is a schematic diagram of the internal structure of the self-locking lock in one embodiment of the present invention during automatic locking. Figures 1 to 5 The changes in position of the internal components of the lock box during the locking process are shown in sequence.

[0016] Figure 6 for Figure 5 A schematic diagram of the internal structure of the self-spring lock from another perspective.

[0017] The attached figures are labeled as follows: 1. Lock box; 11. Limiting rod; 21. Slanted tongue; 22. First connecting rod; 23. Fixing block; 24. First spring; 25. Sliding block; 31. Square tongue; 32. Second spring; 33. Square tongue plate; 34. Locking groove; 35. First sliding groove; 36. Guide surface; 41. First paddle; 42. Locking piece; 43. Third spring; 44. Locking post; 45. Actuating part; 46. Fourth spring; 51. Second paddle; 52. Limiting part; 61. Third paddle; 62. First lever; 71. Safety tongue; 72. Safety connecting rod; 73. Safety spring; 74. Safety lever; 75. Safety push rod; 76. Sliding hole; 77. Baffle. Detailed Implementation

[0018] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0019] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0020] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] According to one embodiment of the present invention, a self-locking mechanism is provided, which is described below in conjunction with... Figures 1 to 6 The self-leaning lock is described using its application on a door as an example. The self-leaning lock includes a lock box 1 and its internal components: a latch assembly, a square latch assembly, a trigger assembly, and an anti-accidental activation assembly. The trigger assembly is linked to both the latch assembly and the square latch assembly.

[0022] The self-locking mechanism utilizes a trigger component that links the latch assembly and the bolt assembly. When the door is closed, the movement of the latch 21 triggers the bolt assembly to automatically extend. In this embodiment, an anti-accidental-touch component is included in the lock housing 1 to control the linkage between the latch assembly and the trigger component. The self-locking function is only achieved when the latch assembly and trigger component are linked. When they are not linked, even if the latch assembly moves, it will not trigger the bolt assembly to lock. Therefore, it avoids the situation where the bolt assembly (31) automatically locks due to accidental touch of the latch 21 when the door is open, thus achieving the anti-accidental-touch locking function.

[0023] In this embodiment, Figure 1 The self-locking mechanism shown is in the open position, with the oblique latch 21 extending out of the lock box 1, the square latch 31 located inside the lock box 1, and the safety latch 71 extending out of the lock box 1. Figure 2 The self-locking mechanism shown is in the state where the safety tongue 71 is pressed into the lock box 1 by the door frame when the door is closed. At this time, the latch 21 is not yet pressed into the lock box 1 by the door frame, or the latch 21 is not completely pressed into the lock box 1 by the door frame. Figure 3 The self-locking lock shown is in the state immediately after the door is closed, and the latch 21 has been completely pressed into the lock box 1 by the door frame; Figure 4 When the self-locking mechanism is in the closed state, the latch 21 is ejected outside the lock box 1, which at the same time drives the trigger component to operate and release the limit of the latch component. Figure 5 The self-locking mechanism shown is in the closed state, and the latch 31 has been ejected to lock the door.

[0024] Specifically, in this embodiment, the side of the lock box 1 is provided with a latch hole for the oblique latch 21, the square latch 31 and the safety latch 71 to extend out.

[0025] The anti-accidental activation component includes a safety latch 71, a safety link 72, a safety spring 73, a safety lever 74, and a safety push lever 75. The safety latch 71 is slidably disposed in a latch hole on the side wall of the lock housing 1, and can extend and retract along the latch hole, positioned either outside or inside the lock housing 1. The safety link 72 is slidably disposed inside the lock housing 1 and connected to the safety latch 71, primarily used to guide and limit the sliding direction of the safety latch 71. The safety spring 73 is disposed inside the lock housing 1, with one end connected to the safety link 72, and is used to apply a force towards the outside of the lock housing 1 to the safety link 72. When the safety latch 71 is not subjected to external force, the elastic force of the safety spring 73 can push the safety latch 71 out of the lock housing 1.

[0026] The safety lever 74 is rotatably mounted inside the lock box 1. One end of the safety lever 74 is connected to the safety link 72, which moves towards... Figure 1When the lever moves to the left, it can rotate the safety lever 74 clockwise. The safety push rod 75 is slidably disposed within the lock housing 1. One end of the safety push rod 75 is connected to the other end of the safety lever 74, and the other end of the safety push rod 75 is connected to the trigger assembly. When the safety lever 74 rotates clockwise, its other end can push the safety push rod 75 towards... Figure 1 The upper side slides, and the top of the safety push rod 75 can push the trigger component to separate from the tongue component.

[0027] Specifically, in practical application, when the door is open, the safety latch 71 and safety linkage 72 are subjected to the elastic force of the safety spring 73, and the safety latch 71 will be outside the lock box 1. At this time, the safety lever 74 will be driven by the safety linkage 72 to rotate clockwise, and then the left end of the safety lever 74 can push the safety push rod 75 upward. After the safety push rod 75 moves upward, its upper end can push the trigger component to move, releasing the linkage between the trigger component and the latch component. Subsequently, in the open state, even if the user accidentally touches the latch 21, for example, by pushing the latch 21 into the lock box 1 and then moving it out, the trigger component will not operate, and the corresponding latch component will not automatically lock.

[0028] When the door needs to be closed later, the door frame will push the safety latch 71 into the lock box 1. At this time, the safety linkage 72 moves to the right, the safety lever 74 rotates counterclockwise, and the safety push lever 75 moves downward. The trigger component can resume its linkage with the latch assembly. As the latch 21 is pushed into the lock box 1 by the door frame and then extends out of the lock box 1, the trigger component can cause the latch assembly to automatically spring open and lock.

[0029] In this embodiment, the latch assembly includes a latch 21, a first connecting rod 22, a fixing block 23, a first spring 24, and a slider 25. The fixing block 23 is fixed inside the lock housing 1. The first connecting rod 22 is slidably disposed within the fixing block 23. The latch 21 and the slider 25 are respectively connected to the two ends of the first connecting rod 22. The slider 25 is slidably disposed inside the lock housing 1. The first spring 24 applies an outward force to the latch 21. When the latch assembly is not subjected to external force, the latch 21 will be pushed outside the lock housing 1 by the first spring 24. In this embodiment, the first spring 24 is a compression spring, which is sleeved on the first connecting rod 22, with its two ends abutting against the fixing block 23 and the latch 21, respectively. When the latch 21 is pressed and moves into the lock housing 1, or when the user actively operates the latch 21 to move into the lock housing 1, the compression force of the first spring 24 increases. After the latch assembly loses external force, the latch 21 is ejected outside the lock housing 1 by the first spring 24.

[0030] The latch assembly includes a latch 31, a second spring 32, and a latch plate 33 slidably disposed within the lock housing 1. The latch 31 and the latch plate 33 are connected together. A locking groove 34 is formed on the side of the latch plate 33. The second spring 32 applies an outward force to the latch plate 33. When the latch 31 and the latch plate 33 are not subjected to external force, the second spring 32 can push them outward to achieve locking.

[0031] The triggering assembly includes a first lever 41, a second lever 51, a locking plate 42, and a third spring 43. The locking plate 42 is rotatably disposed within the lock housing 1. One side of the locking plate 42 has a locking pin 44 that can be embedded in the locking groove 34, and the other side has the second lever 51 rotatably disposed thereon. The rotation path of the locking pin 44 is fixed. When the square tongue 31 retracts into the lock housing 1, the locking groove 34 on the square tongue plate 33 is located on the rotation path of the locking pin 44.

[0032] The second lever 51 is rotatably mounted inside the lock housing 1, with one end of the second lever 51 abutting against the side of the locking piece 42, such as... Figure 6 As shown, when the second lever 51 rotates clockwise around the figure, it can drive the locking piece 42 to rotate counterclockwise, thereby causing the locking pin 44 to move out of the locking groove 34. The other end of the second lever 51 is rotatably provided with the first lever 41.

[0033] like Figures 1 to 6 As shown, the middle part of the first paddle 41 is rotatably connected to the upper side of the second paddle 51. A paddle part 45 is formed on the side of the first paddle 41 near the tongue assembly, and the other side is connected to a third spring 43. The third spring 43 applies a force to the first paddle 41, generating a counterclockwise torque on the paddle part 45, allowing the paddle part 45 to rotate... Figure 1 The rotating part 45 rotates counterclockwise, causing the side of the moving part 45 to abut against the fixed block 23 when no external force is applied.

[0034] When the door is open, the internal structure of the self-locking mechanism is as follows: Figure 1 As shown. During the closing process, as... Figures 2 to 5As shown, the latch 21 gradually moves into the lock box 1 under the pressure of the door frame, and the slider 25 moves inward at the same time. The front end of the actuating part 45 gradually moves from the right side of the slider 25 to between the fixed block 23 and the slider 25. At this time, the front end of the actuating part 45 extends to the path of the slider 25 sliding outward under the action of the third spring 43. When the door is closed, the latch 21 moves outward under the action of the first spring 24, and the slider 25 moves outward at the same time. The outer side of the slider 25 abuts against the front end of the actuating part 45. After overcoming the action of the third spring 43, it pushes the actuating part 45 to move outward at the same time, causing the second actuating plate 51 to rotate counterclockwise. The lower end of the second actuating plate 51 can push the locking plate 42 to rotate clockwise. The locking pin 44 on the locking plate 42 moves out of the locking groove 34, releasing the limit of the square latch plate 33. The square latch plate 33 drives the square latch 31 to move outward under the action of the second spring 32, realizing the locking. During the entire closing process, the user only needs to move the door leaf; no additional operation of the self-locking mechanism is required for automatic locking. Furthermore, the self-locking mechanism has a relatively simple structure, fewer parts, is less prone to malfunction, and has low manufacturing costs.

[0035] In this embodiment, a specific scheme is disclosed for the coordinated operation of the latch assembly, trigger assembly, and square latch assembly to achieve self-spring locking. The anti-accidental-touch component controls whether the latch assembly and trigger assembly are linked to achieve the function of preventing accidental locking. In other embodiments, by changing the specific scheme for the coordinated operation of the latch assembly, trigger assembly, and square latch assembly to achieve self-spring locking, the anti-accidental-touch component in this embodiment can be used to control whether the latch assembly and trigger assembly are linked to achieve the same function of preventing accidental locking.

[0036] In this embodiment, the safety linkage 72 is provided with a baffle 77, such as Figures 1 to 5 As shown, the baffle 77 is located on the side of the safety lever 74 away from the safety tongue 71; the safety push rod 75 is vertically disposed inside the lock box 1. When the safety linkage 72 moves to the left, the baffle 77 can drive the safety lever 74 to rotate clockwise; when the safety linkage 72 moves to the right, the safety lever 74 is not limited by the safety linkage 72, and the safety push rod 75 slides downward under its own weight, which can drive the safety lever 74 to rotate counterclockwise until the lower end of the safety lever 74 abuts against the baffle 77, or until the safety push rod 75 moves to the lowest point of its range of motion.

[0037] The upper end of the safety push rod 75 is located on the lower left side of the first paddle 41, that is, the end away from the actuating part 45. When the safety push rod 75 moves upward, its upper end abuts against the first paddle 41, causing the first paddle 41 to rotate clockwise. Correspondingly, the actuating part 45 moves downward away from the latch assembly, that is, the linkage between the trigger assembly and the latch assembly is disengaged. When the safety push rod 75 moves downward, the first paddle 41 returns to its position under the force of the third spring 43, causing the side of the actuating part 45 to abut against the fixing block 23, that is, the linkage between the trigger assembly and the latch assembly is restored.

[0038] The structure and positioning of the safety linkage 72, safety lever 74, and safety push lever 75 enable control over whether the trigger assembly and the latch assembly are linked.

[0039] In another embodiment, the safety linkage 72 is provided with two baffles 77 located on both sides of one end of the safety lever 74; the safety push rod 75 is provided with two baffles 77 located on both sides of the other end of the safety lever 74. When the safety linkage 72 moves to the left, the baffles 77 can drive the safety lever 74 to rotate clockwise, and the other end of the safety lever 74 can drive the safety push rod 75 to slide; when the safety linkage 72 moves to the right, the baffles 77 can drive the safety lever 74 to rotate counterclockwise, and the other end of the safety lever 74 can drive the safety push rod 75 to slide in the opposite direction. This structural form can also realize whether the control trigger component and the latch component are linked.

[0040] like Figure 5 As shown, a fourth spring 46 is provided inside the lock box 1. The fourth spring 46 applies a force to the locking plate 42, causing the locking pin 44 to be embedded in the locking groove 34. Specifically, in this embodiment, the fourth spring 46 is a torsion spring, with one end fixedly mounted on a torsion arm and the other end connected to the locking plate 42. The elastic force applied by the fourth spring 46 to the locking plate 42 is directed towards the side of the square tongue plate 33, so that when the locking plate 42 is not subjected to external force, the locking pin 44 abuts against the side of the square tongue plate 33. When the locking groove 34 is located on the rotation path of the locking pin 44, the fourth spring 46 can make the locking pin 44 press tightly against the locking groove 34, thereby limiting the position of the square tongue assembly.

[0041] In this embodiment, such as Figure 5 and Figure 6 As shown, an inclined first groove 35 is formed on the square tongue plate 33; a third lever 61 is rotatably disposed inside the lock box 1, and a first lever 62 that slides in the first groove 35 is formed on the third lever 61; the second spring 32 is a torsion spring, one end of which is fixed inside the lock box 1, and the other end abuts against the third lever 61. The elastic force applied by the second spring 32 to the third lever 61 can form along the third lever 61. Figure 6The counterclockwise torque, when the square tongue plate 33 is not restricted, drives the third lever 61 to rotate. Figure 5 When rotated clockwise, the first lever 62 slides relative to the first slide groove 35, which drives the square tongue plate 33 and the square tongue 31 to move to the left, so that the square tongue 31 extends to lock.

[0042] In other embodiments, the second spring 32 can also act directly on the square tongue 31 or the square tongue plate 33, and can also complete the locking action when the square tongue plate 33 is not restricted.

[0043] In this embodiment, such as Figure 2 and Figure 3 As shown, a limiting part 52 is formed on the second lever 51, which is opposite to the fixing block 23. When the safety push rod 75 pushes the first lever 41 to rotate clockwise, after rotating a certain angle, the limiting part 52 will abut against the fixing block 23, which can limit the rotation angle of the first lever 41 and prevent interference with other structures inside the lock box 1. In addition, after the safety push rod 75 resets, the first lever 41 can also quickly return to its position under the elastic force of the third spring 43, so that the trigger assembly and the latch assembly resume their linkage relationship.

[0044] In this embodiment, one side of the square tongue plate 33 is an inclined guide surface 36, such as... Figure 5 As shown, the guide surface 36 is located on the side of the locking groove 34 away from the square tongue 31. When the square tongue 31 extends out of the lock box 1, the guide surface 36 is opposite to the locking post 44. During the subsequent movement of the square tongue plate 33 into the lock box 1, the guide surface 36 abuts against the locking post 44, which can guide the locking piece 42 along... Figure 5 Rotate clockwise to move the locking pin 44 into the locking groove 34, thus completing the limiting of the opposite tongue plate 33.

[0045] like Figure 6 As shown, in this embodiment, the safety push rod 75 has a strip-shaped sliding hole 76 along its own length direction, and the lock box 1 has a limiting rod 11 assembled in the sliding hole 76. This allows the safety push rod 75 to slide stably along its own length direction, and the sliding distance is the minimum length of the sliding hole 76.

[0046] In other embodiments, the first spring 24, the second spring 32, the third spring 43, and the fourth spring 46 can be selected from compression springs, tension springs, and torsion springs. By simply adjusting their positions, they can also perform the corresponding functions of the aforementioned springs.

[0047] 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 self-latching lock characterized in that, The lock box includes a latch assembly, a square latch assembly, a trigger assembly, and an anti-accidental touch assembly within it. The trigger assembly is linked to both the latch assembly and the square latch assembly. The anti-accidental touch assembly includes: The safety latch is slidably disposed in the latch hole on the side wall of the lock box; The safety linkage is slidably disposed within the lock box and connected to the safety tongue; A safety spring, located inside the lock box, applies a force toward the outside of the lock box to the safety linkage; The safety lever is rotatably mounted inside the lock box, with one end connected to the safety linkage. A safety lever is slidably disposed within the lock housing, with one end connected to the other end of the safety detent and the other end connected to the trigger assembly; wherein... When the safety latch slides outside the lock box, the safety linkage drives the safety lever to rotate, and the safety push rod slides, thereby disengaging the trigger assembly from the latch assembly; when the safety latch slides inside the lock box, the safety push rod slides in the opposite direction, thereby restoring the trigger assembly from the latch assembly.

2. The self-locking mechanism as described in claim 1, characterized in that, The latch assembly includes a latch, a first connecting rod, a fixing block, a first spring, and a slider. The fixing block is fixed inside the lock box, the first connecting rod is slidably disposed in the fixing block, the latch and the slider are respectively connected to the two ends of the first connecting rod, the slider is slidably disposed inside the lock box, and the first spring applies an outward force to the latch. The square tongue assembly includes a square tongue, a second spring, and a square tongue plate slidably disposed within the lock box. A locking groove is formed on the side of the square tongue plate, and the second spring applies an outward force to the square tongue plate. The triggering assembly includes a first paddle, a second paddle, a locking plate, and a third spring. The locking plate is rotatably disposed within the lock box. One side of the locking plate has a locking post that can be embedded in the locking groove, and the other side has the second paddle rotatably disposed. One end of the second paddle abuts against the side of the locking plate, and the other end has the first paddle rotatably disposed. The side of the first paddle near the tongue assembly has a toggle part, and the other side is connected to the third spring. The third spring applies a force to the first paddle, causing the side of the toggle part to abut against the fixing block. When the front end of the actuating part is located between the slider and the fixed block, the front end of the actuating part extends to the path on which the slider slides outward.

3. The self-locking mechanism as described in claim 2, characterized in that, The safety linkage is provided with a baffle, which is located on the side of the safety lever away from the safety tongue; the safety push rod is vertically arranged in the lock box; the upper end of the safety push rod is connected to the other side of the first lever.

4. The self-locking mechanism as described in claim 2, characterized in that, The safety linkage is provided with two baffles located on both sides of one end of the safety lever; The safety push rod is provided with two baffles located on both sides of the other end of the safety lever, and the upper end of the safety push rod is connected to the other side of the first lever.

5. The self-locking mechanism as described in claim 2, characterized in that, The lock box is equipped with a fourth spring, which applies a force to the locking plate, causing the locking pin to be embedded in the locking groove.

6. The self-locking mechanism as described in claim 2, characterized in that, An inclined first groove is formed on the square tongue plate; The lock box is rotatably provided with a third lever, and a first lever that slides in the first groove is formed on the third lever. The second spring is a torsion spring, with one end of its torsion arm fixed inside the lock box and the other end abutting against the third lever.

7. The self-locking mechanism as described in claim 2, characterized in that, The second paddle has a limiting portion that is opposite to the fixed block.

8. The self-locking mechanism as described in claim 2, characterized in that, One side of the square tongue plate is an inclined guide surface, which is located on the side of the locking groove away from the square tongue. When the square tongue extends out of the lock box, the guide surface is opposite to the locking post.

9. The self-locking mechanism as described in claim 2, characterized in that, The first spring is a compression spring, which is sleeved on the first connecting rod, with its two ends abutting against the fixed block and the oblique tongue, respectively.

10. The self-locking mechanism as described in any one of claims 1 to 9, characterized in that, The safety push rod has a strip-shaped sliding hole along its own length, and the lock box has a limiting rod assembled in the sliding hole.

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