Automatic locks

Abstract

The present invention provides an automatic lock, comprising a lock housing, a first lock tongue, a second lock tongue and a lock core arranged on the lock housing, wherein a driving device for driving the first lock tongue to extend and retract, a linkage mechanism for linking the second lock tongue when the first lock tongue retracts and a release mechanism for releasing the second lock tongue from the lock housing after the door body is opened are arranged in the lock housing, the driving device comprises a clutch mechanism connected to the first lock tongue and an electric driving member for driving the clutch mechanism, and the lock core is connected and used to engage and disengage the clutch mechanism. The automatic lock provided by the present invention is provided with a driving device including a clutch mechanism and an electric driving member in the lock housing, and under normal working conditions, the electric driving member drives the clutch mechanism to work but does not engage and disengage, and when the electric driving member or the connection part between the clutch mechanism and the electric driving member fails, the traditional lock core unlocking method can be used to drive the first lock tongue to extend and retract. The automation and intelligence of the lock are greatly improved, and the traditional unlocking method can be used to unlock the lock when a failure occurs.

Description

Technical Field

[0001] The invention belongs to the field of locks, and more specifically, relates to an automatic lock. Background Art

[0002] Locks are common tools in people's daily lives. They have a history of thousands of years in the world and have a certain impact on people's normal lives.

[0003] Traditional home or company locks are mostly mechanical locks that lack automation, and the locks are locked and unlocked by physically operating the lock cylinder with a physical key.

[0004] Traditional purely mechanical locks are still relatively suitable for general use at this stage, but with the continuous advancement of technology and people's constant pursuit of high product quality, purely mechanical locks lack automated operations and cannot meet people's needs for simplified and automated locks. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic lock to solve the problem of low automation in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an automatic lock, including a lock shell, a first lock tongue, a second lock tongue and a lock core arranged on the lock shell, the lock shell is provided with a driving device for driving the first lock tongue to extend and retract, a linkage mechanism for linking the second lock tongue when the first lock tongue retracts, and a release mechanism for releasing the second lock tongue from the lock shell after the door body is opened, the driving device includes a clutch mechanism connected to the first lock tongue and an electric drive component for driving the clutch mechanism, and the lock core is connected and used to clutch the clutch mechanism.

[0007] Furthermore, the clutch mechanism includes a separation component arranged below the transmission component, which is driven by the lock core to clutch the transmission component into a part connected to the electric drive component and a part connected to the first connecting plate. Under the drive of the lock core, the separation component drives the part connected to the first connecting plate to link with the first connecting plate to control the extension and retraction of the first lock tongue.

[0008] Further, the separation assembly includes a separation plate for carrying the transmission assembly and a separator for driving the transmission assembly to engage or disengage, the separation plate is arranged on the lock housing and an end of the separation plate is connected to the lock core, the separator is arranged on the lock housing and an end of the separator is connected to the transmission assembly; the separator is pivotally connected to the lock housing and the separator passes through the separation plate, and a notch is provided on the separation plate for accommodating the separator, the transmission assembly includes a plurality of mutually meshing disc gears and a half-side gear for engaging or disengaging with the plurality of the disc gears, the half-side gear is connected to the first connecting plate and meshes with at least one of the disc gears.

[0009] Furthermore, the separator is rotatably connected to the lock housing and a baffle is provided at the free end of the separator for shifting the half gear and the disc gear into engagement and disengagement. A first connecting rod is provided between the half gear and the first connecting plate. A first connecting hole is provided on the half gear for plugging in the first connecting rod, and a first connecting groove is provided on the first connecting plate for sliding of the first connecting rod.

[0010] Furthermore, a first connecting ring is arranged between the first connecting rod and the half gear, the first connecting rod passes through the first connecting ring and the first connecting hole in sequence, a second connecting rod for positioning the moving position of the first connecting plate is arranged on the lock housing, and a second connecting groove for the sliding of the second connecting rod is opened on the first connecting plate; at least one second connecting plate for positioning the telescopic path of the first lock tongue is also arranged on the first connecting plate, and the second connecting plate is connected to the first connecting plate.

[0011] Furthermore, two second connecting plates are connected to the first connecting plate, and the two second connecting plates are respectively located at the upper and lower ends of the first connecting plate and are symmetrical about the axis of the extension and retraction direction of the first locking tongue; a third connecting rod is also provided on the first connecting plate, and a third connecting groove for the sliding of the third connecting rod is opened on the second connecting plate.

[0012] Furthermore, the linkage mechanism includes a toggle rod and a limiting structure for driving the second lock tongue to extend from the lock housing, one end of the toggle rod is used to toggle the limiting structure, the half gear is connected to the other end of the toggle rod and is used to drive the toggle rod, the lock housing is provided with a first sliding groove for the limiting structure to slide, and the lock housing is provided with a positioning column for positioning the sliding depth of the limiting structure.

[0013] Furthermore, the end of the second lock tongue is provided with a locking mechanism for limiting the second lock tongue in the lock housing, a guide rod arranged at the rear end of the second lock tongue, and a first elastic member arranged at the rear end of the second lock tongue; the guide rod passes through a limiting mechanism arranged on the lock housing to limit the second lock tongue to run along the axial direction of the guide rod.

[0014] Furthermore, the locking mechanism includes a locking arm, one end of the locking arm close to the second lock tongue is rotatably connected to the lock housing, the other end is provided with a bayonet that can abut against a side of the limiting structure facing the guide rod, and a protrusion is provided at the rotatable end of the locking arm.

[0015] Furthermore, the release mechanism includes a driving arm parallel to the guide rod and having a free end and an abutting end, a second elastic member connecting the abutting end and the lock shell and generating an elastic force toward the free end when the door body is closed; the free end is chamfered toward the closed side of the door body, and the free end of the driving arm is chamfered toward the open side of the door body, and the limiting mechanism is provided with a limiting groove for the guide rod to pass through; the release mechanism also includes a limiting block arranged at the free end of the driving arm, a blocking portion for limiting the complete entry of the limiting block is provided in the lock shell, an arc-shaped notch for the movement of the toggle rod is provided at one end of the locking arm facing the toggle rod, a slider is provided at the end of the driving arm away from the limiting block, and a second sliding groove for the sliding of the slider is provided on the lock shell.

[0016] The beneficial effect of the automatic lock provided by the present invention is that: compared with the prior art, the present invention is provided with a driving device including a clutch mechanism and an electric drive member in the lock shell, and under normal working conditions, the electric drive member drives the clutch mechanism to work but does not clutch, and the clutch mechanism then drives the first lock tongue to extend and retract in the lock shell, and the first lock tongue drives the linkage mechanism to move during the extension and retraction process, and the linkage mechanism then causes the second lock tongue to extend and retract in the lock shell to realize the linkage action of the second lock tongue and the first lock tongue, and after the second lock tongue is retracted into the lock shell so that the door body can be opened, the release mechanism automatically releases the second lock tongue from the lock shell, and the release of the second lock tongue is independent of the extension and retraction of the first lock tongue. When the electric drive member or the connection part between the clutch mechanism and the electric drive member fails, the traditional lock core unlocking method can be used to drive the first lock tongue to extend and retract. The present invention greatly improves the automation and intelligence of the lock, greatly reduces the physical operation of the user, and in addition, the traditional unlocking method can also be used to solve the unlocking problem when a failure occurs, which conforms to humanized and industrialized design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of an automatic lock provided by an embodiment of the present invention, with some structures not shown;

[0019] Figure 2 A schematic diagram of the structure of a driving device provided in an embodiment of the present invention, with some structures not shown;

[0020] Figure 3 A schematic diagram of the structure of the linkage mechanism, locking mechanism and release mechanism provided in an embodiment of the present invention, some mechanisms are not shown;

[0021] Figure 4 This is another schematic diagram of the structure of the automatic lock provided by an embodiment of the present invention, with some structures not shown.

[0022] Among them, the main marks of the drawings in the figure are:

[0023] 1. Lock housing; 2. First lock tongue; 3. Second lock tongue; 4. Lock core;

[0024] 5. driving device; 51. clutch mechanism; 511. transmission assembly; 5111. disc gear; 5112. half gear; 512. separation assembly; 5121. separation plate; 5122. separator; 513. first connecting plate; 52. electric driving member;

[0025] 6. linkage mechanism; 61. toggle lever; 62. sliding plate;

[0026] 7. locking mechanism; 71. locking arm; 72. bayonet; 73. projection;

[0027] 8. Release mechanism; 81. Driving arm; 82. Limit block;

[0028] 9. Baffle; 10. First connecting rod; 11. First connecting groove; 12. Second connecting rod; 13. Second connecting groove; 14. Second connecting plate; 15. Third connecting rod; 16. Third connecting groove; 17. First slide groove; 18. Positioning column; 19. Guide rod; 20. Limiting frame; 21. Blocking part; 22. Baffle plate; 23. Limiting groove; 25. Second slide groove; 26. Arc-shaped notch. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Please also read Figure 1 and Figure 2, the automatic lock provided by the embodiment of the present invention is now described. The automatic lock comprises a lock housing 1, a second lock tongue 3, a first lock tongue 2 and a lock core 4. The first lock tongue 2, the second lock tongue 3 and the lock core 4 are all arranged on the lock housing 1. The lock housing 1 is provided with a driving device 5, a linkage mechanism 6 and a release mechanism 8. The driving device 5 is used to drive the first lock tongue 2 to extend and retract. When the first lock tongue 2 retracts, the linkage mechanism 6 makes the second lock tongue 3 to be linked with the extension and retraction of the first lock tongue 2. The release mechanism 8 is used to release the second lock tongue 3 from the lock housing 1 after the door body is opened. Among them, the driving device 5 comprises a clutch mechanism 51 and an electric driving member 52. The clutch mechanism 51 is connected to the first lock tongue 2. The electric driving member 52 is used to drive the clutch mechanism 51. The lock core 4 is connected to the clutch mechanism 51 and is used to make the clutch mechanism 51 clutch. In this embodiment, the electric driving member 52 is selected as a motor. During use, the motor can be used to provide power for unlocking, which improves the automation and intelligence of unlocking and conforms to humanized and industrialized design.

[0035] Compared with the prior art, the automatic lock provided by the present invention has a driving device 5 including a clutch mechanism 51 and an electric drive member 52 arranged in the lock housing 1. Under normal working conditions, the electric drive member 52 drives the clutch mechanism 51 to work but does not engage or disengage. The clutch mechanism 51 then drives the first lock tongue 2 to extend and retract in the lock housing 1. The first lock tongue 2 drives the linkage mechanism 6 to move during the extension and retraction process. The linkage mechanism 6 then causes the second lock tongue 3 to extend and retract in the lock housing 1 to achieve the linkage action of the second lock tongue 3 and the first lock tongue 2. After the second lock tongue 3 is retracted into the lock housing 1 so that the door body can be opened, the release mechanism 8 automatically releases the second lock tongue 3 from the lock housing 1. The release of the second lock tongue 3 is independent of the extension and retraction of the first lock tongue 2. When the electric drive member 52 or the connection part between the clutch mechanism 51 and the electric drive member 52 fails, the first lock tongue 2 can be driven to extend and retract by the conventional lock cylinder 4 unlocking method. The present invention greatly improves the automation and intelligence of the lock, greatly reduces the physical operation of the user, and in addition, when a fault occurs, the traditional unlocking method can be used to solve the unlocking problem, which conforms to the humanized and industrialized design.

[0036] Please also refer to Figure 1 and Figure 2The clutch mechanism 51 includes a transmission component 511, a separation component 512 and a first connecting plate 513. The transmission component 511 is connected to the output end of the electric drive member 52. The transmission component 511 is arranged on the separation component 512. The separation component 512 can be used to make the transmission components 511 clutch when a failure occurs in the transmission component 511. After the clutch, the transmission component 511 is divided into a part connected to the electric drive member 52 and a part connected to the first connecting plate 513. The two ends of the first connecting plate 513 are respectively connected to the transmission component 511 and the first lock tongue 2. During the operation, the electric drive member 52 can transmit the driving force to the first connecting plate 513 through the transmission component 511, and the first connecting plate 513 then transmits the driving force to the first lock tongue 2, so that the first lock tongue 2 is retracted and expanded in the lock housing 1.

[0037] For further information, see Figure 1 and Figure 2 The separation component 512 includes a separation plate 5121 and a separator 5122. The separation plate 5121 is arranged on the lock housing 1, and the end of the separation plate 5121 is connected to the lock cylinder 4. The transmission component 511 is carried on the separation plate 5121, and the separator 5122 is arranged on the lock housing 1. The end of the separator 5122 is connected to the transmission component 511 and is used to drive the transmission component 511 to engage or disengage.

[0038] For further information, see Figure 1 and Figure 2 The separator 5122 is pivotally connected to the lock housing 1 and passes through the separation plate 5121 to reduce the use space of the lock housing 1 occupied by the separation plate 5121 and the separator 5122, save materials for manufacturing the lock housing 1 and reduce the weight of the lock housing 1, which conforms to the humanized and industrialized design.

[0039] For further information, see Figure 1 and Figure 2 A notch is provided on the separation plate 5121, and the separator 5122 is pivotally connected to the lock housing 1 and accommodated in the notch, so that the installation of the separator 5122 and the separation plate 5121 in the lock housing 1 is more compact and reasonable.

[0040] For further information, see Figure 1 and Figure 2The transmission assembly 511 includes a plurality of disc gears 5111 and a half gear 5112 that are pivotally connected to the separation plate 5121 and meshed with each other. The half gear 5112 is connected to the first connection plate 513 and meshed with at least one disc gear 5111. In this embodiment, the half gear 5112 is only meshed with one of the disc gears 5111. When clutching is required, the separator 5122 drives the half gear 5112 to horizontally clutch the disc gear 5111 to disconnect the transmission connection between the first locking tongue 2 and the electric drive member 52 and the disc gear 5111. Of course, in other embodiments, the gear type, the number of gears, and the number of gears meshing with the half gear 5112 of the transmission assembly 511 can also be selected according to actual conditions, which will not be repeated here.

[0041] For further information, see Figure 2 and Figure 4 The separator 5122 is rotationally connected to the lock housing 1, and a baffle 9 is provided at the free end of the separator 5122. During the rotation of the separator 5122, the baffle 9 can be used to move the half gear 5112, so that the half gear 5112 and the disc gear 5111 are clutched.

[0042] For further information, see Figures 2 to 4 A first connecting rod 10 is arranged between the half gear 5112 and the first connecting plate 513, and a first connecting hole is arranged on the half gear 5112 near the first connecting plate 513. A first connecting groove 11 is arranged on the first connecting plate 513, and the first connecting rod 10 is inserted into the first connecting hole. The half gear 5112 drives the first connecting rod 10 to move during the rotation, and the first connecting rod 10 is slidingly connected to the first connecting groove 11. During the movement, the first connecting rod 10 makes the first connecting plate 513 move through the sliding connection with the first connecting groove 11, so that the first lock tongue 2 is extended and retracted in the lock shell 1 to realize the switch lock.

[0043] For further information, see Figure 2 A first connecting ring is provided between the first connecting rod 10 and the half gear 5112. The first connecting rod 10 passes through the first connecting ring and the first connecting hole in sequence. The first connecting ring makes the connection between the first connecting rod 10 and the first connecting hole more firm and stable.

[0044] For further information, see Figure 4 A second connecting rod 12 for positioning the moving position of the first connecting plate 513 is provided on the lock housing 1, and a second connecting groove 13 for the second connecting rod 12 to slide is opened on the first connecting plate 513. When the first connecting plate 513 moves, the cooperation between the second connecting rod 12 and the second connecting groove 13 enables the first connecting plate 513 and the first lock tongue 2 to move and extend within a set range.

[0045] For further information, see Figure 4 At least one second connecting plate 14 is connected to the first connecting plate 513. The second connecting plate 14 is used to locate the telescopic path of the first lock tongue 2. The second connecting plate 14 and the first connecting plate 513 are connected together. When the first connecting plate 513 drives the first lock tongue 2 to telescope, the second connecting plate 14 continuously locates and corrects the telescopic path of the first lock tongue 2 to reduce the friction between the first lock tongue 2 and the lock housing 1, so that the lock can be opened and closed more smoothly.

[0046] For further information, see Figure 2 and Figure 4 Two second connecting plates 14 are connected to the first connecting plate 513, and the two second connecting plates 14 are respectively located on the upper and lower sides of the first connecting plate 513. Moreover, the two second connecting plates 14 are symmetrical about the axis of the extension and retraction direction of the first lock tongue 2, so that the force exerted by the second connecting plates 14 on the first connecting plate 513 during the process of driving the first lock tongue 2 to retract and retract is more uniform and balanced.

[0047] For further information, see Figure 2 and Figure 4 A third connecting rod 15 is also provided on the first connecting plate 513, and a third connecting groove 16 is opened on the second connecting plate 14. The third connecting rod 15 and the third connecting groove 16 are slidably connected, so that the first locking tongue 2 is more stably limited by the second connecting plate 14 during the extension and retraction process.

[0048] For further information, see Figure 1 and Figure 3 The linkage mechanism 6 includes a toggle rod 61 and a limiting structure. In this embodiment, the limiting structure is designed as a sliding plate 62. The toggle rod 61 is used to extend the second lock tongue 3 from the lock housing 1. One end of the toggle rod 61 is used to toggle the sliding plate 62. The other end of the toggle rod 61 is connected to the half gear 5112. The half gear 5112 is used to drive the toggle rod 61.

[0049] For further information, see Figure 1 and Figure 3 A first slide groove 17 is provided on the lock housing 1 , and the sliding plate 62 is slidably connected to the first slide groove 17 . The first slide groove 17 has a limiting effect on the sliding direction and depth of the sliding plate 62 .

[0050] For further information, see Figure 1 and Figure 3 A positioning column 18 is provided on the lock housing 1, and the positioning column 18 further limits the sliding depth of the sliding plate 62, and when the sliding plate 62 slides to the deepest position, the positioning column 18 has abutment and support function on the sliding plate 62 to prevent the sliding plate 62 from falling off from the first sliding groove 17.

[0051] For further information, see Figure 1 and Figure 3 The end of the second lock tongue 3 is provided with a locking mechanism 7, a guide rod 19 and a first elastic member, the locking mechanism 7 is used to limit the second lock tongue 3 in the lock housing 1, the guide rod 19 is provided at the rear end of the second lock tongue 3, the first elastic member is provided at the rear end of the second lock tongue 3, the guide rod 19 passes through a limiting mechanism provided on the lock housing 1, so that the second lock tongue 3 moves along the axial direction of the guide rod 19. In this embodiment, the limiting mechanism is designed as a limiting frame 20.

[0052] For further information, see Figure 1 and Figure 3 The locking mechanism 7 includes a locking arm 71, and one end of the locking arm 71 close to the second locking tongue 3 is rotatably connected to the lock housing 1. The other end of the locking arm 71 is provided with a bayonet 72, which abuts against a side of the sliding plate 62 facing the guide rod 19. A protrusion 73 is provided at the rotatable end of the locking arm 71.

[0053] For further information, see Figure 1 and Figure 3 The release mechanism 8 includes a second elastic member and a driving arm 81 having a free end and an abutting end. The driving arm 81 and the guide rod 19 are arranged parallel to each other. The second elastic member is connected to the free end and the abutting end of the driving arm 81. The second elastic member generates an elastic force toward the free end when the door body is closed; the free end of the driving arm 81 is chamfered on the side facing the closing of the door body. When the door body is closed, the driving arm 81 can be retracted into the lock shell 1 through the interaction between the chamfer and the door body.

[0054] For further information, see Figure 1 and Figure 3 The release mechanism 8 further includes a stopper 82, which is disposed at the free end of the driving arm 81. A stopper 21 is disposed in the lock housing 1. When the driving arm 81 is retracted into the lock housing 1, the stopper 21 blocks the stopper 82 to prevent the stopper 82 and the driving arm 81 from being completely retracted into the lock housing 1. In this example, the stopper 82 is designed to be cylindrical, and an arc-shaped stopper opening is designed in the lock housing 1 to block the stopper 82.

[0055] For further information, see Figure 1 and Figure 3 The free end of the driving arm 81 is chamfered toward the side where the door is opened. In this way, the free end of the driving arm 81 is chamfered on both sides of the door opening and closing, so that the driving arm 81 can be more conveniently driven to retract into the lock housing 1.

[0056] For further information, see Figure 1 and Figure 3The first elastic member is connected between the second lock tongue 3 and the lock housing 1. The first elastic member generates an elastic force along the pop-out direction of the second lock tongue 3 when the second lock tongue 3 is restricted in the lock housing 1, so that the first elastic member can make the second lock tongue 3 pop out from the lock housing 1 in time after the lock is opened and closed, so that the second lock tongue 3 pops out from the lock housing 1 before the first lock tongue 2.

[0057] Furthermore, in this embodiment, the first elastic member is selected to be a spring, one end of the spring is connected to the rear end of the second locking tongue 3 , and the other end of the spring abuts against the limiting frame 20 .

[0058] For further information, see Figure 1 and Figure 3 A baffle 22 is provided at one end of the guide rod 19 away from the second locking tongue 3, and the guide rod 19 passes through the sliding plate 62. The baffle 22 and the sliding plate 62 abut against each other so that the guide rod 19 and the sliding plate 62 are relatively fixed during the sliding process to prevent the guide rod 19 and the sliding plate 62 from detaching during the movement.

[0059] For further information, see Figure 1 and Figure 3 In the present embodiment, a limiting groove 23 for the guide rod 19 to pass through is provided on the limiting frame 20. Of course, in other embodiments, the limiting groove 23 may be replaced by a limiting hole, which will not be described in detail here.

[0060] For further information, see Figure 1 and Figure 3 A slider is provided at one end of the driving arm 81 away from the limit block 82, and a second slide groove 25 is provided on the lock housing 1. The driving arm 81 slides on the lock housing 1 through the sliding cooperation between the slider and the slide groove.

[0061] For further information, see Figure 1 and Figure 3 An arc-shaped notch 26 is formed at one end of the locking arm 71 facing the toggle rod 61. The toggle rod 61 rotates relative to the lock housing 1 during the toggle process. The end of the toggle rod 61 passes through the arc-shaped notch 26 to prevent the toggle rod 61 from interfering with the locking arm 71 during the rotation process.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic lock, comprising a lock housing, a first lock tongue, a second lock tongue and a lock core arranged on the lock housing, characterized in that: The lock housing is provided with a driving device for driving the first lock tongue to extend and retract, a linkage mechanism for linking the second lock tongue when the first lock tongue retracts, and a release mechanism for releasing the second lock tongue from the lock housing after the door body is opened, the driving device includes a clutch mechanism connected to the first lock tongue and an electric driving member for driving the clutch mechanism, and the lock core is connected and used to engage and disengage the clutch mechanism; The linkage mechanism comprises a toggle rod and a limiting structure for driving the second lock tongue to extend from the lock housing, one end of the toggle rod is used to toggle the limiting structure, the half gear in the clutch mechanism is connected to the other end of the toggle rod and is used to drive the toggle rod; the end of the second lock tongue is provided with a locking mechanism for limiting the second lock tongue in the lock housing, a guide rod arranged at the rear end of the second lock tongue and a first elastic member arranged at the rear end of the second lock tongue; the guide rod passes through the limiting mechanism arranged on the lock housing to limit the second lock tongue to run along the axial direction of the guide rod; the locking mechanism comprises a locking arm, one end of the locking arm close to the second lock tongue is rotatably connected to the lock housing, the other end is provided with a bayonet which can abut against a side of the limiting structure facing the guide rod, and the rotatable end of the locking arm is provided with a protrusion; the locking arm is provided with an arc-shaped notch for allowing the toggle rod to move at one end facing the toggle rod; The clutch mechanism includes a transmission assembly, a first connecting plate, and a separation assembly arranged below the transmission assembly and driven by the lock core to clutch the transmission assembly into a part connected to the electric drive member and a part connected to the first connecting plate. Under the drive of the lock core, the separation assembly drives the part connected to the first connecting plate to link with the first connecting plate to control the extension and retraction of the first lock tongue; the first connecting plate is connected to two second connecting plates for positioning the extension and retraction path of the first lock tongue, and the two second connecting plates are respectively located at the upper and lower ends of the first connecting plate and the two second connecting plates are symmetrical about the axis of the extension and retraction direction of the first lock tongue; a third connecting rod is also arranged on the first connecting plate, and a third connecting groove for the sliding of the third connecting rod is opened on the second connecting plate.

2. The automatic lock according to claim 1, characterized in that: The separation assembly includes a separation plate for carrying the transmission assembly and a separator for driving the transmission assembly to engage or disengage, the separation plate is arranged on the lock housing and an end of the separation plate is connected to the lock core, the separator is arranged on the lock housing and an end of the separator is connected to the transmission assembly; the separator is pivotally connected to the lock housing and the separator passes through the separation plate, and a notch is provided on the separation plate for accommodating the separator; the transmission assembly includes a plurality of mutually meshing disc gears and a half-side gear for engaging or disengaging with the plurality of the disc gears, the half-side gear is connected to the first connecting plate and meshes with at least one of the disc gears.

3. The automatic lock according to claim 2, characterized in that: The separator is rotatably connected to the lock housing and a baffle is provided at the free end of the separator for shifting the half gear and the disc gear into engagement or disengagement. A first connecting rod is provided between the half gear and the first connecting plate, a first connecting hole is provided on the half gear for plugging in the first connecting rod, and a first connecting groove is provided on the first connecting plate for sliding of the first connecting rod.

4. The automatic lock according to claim 3, characterized in that: A first connecting ring is arranged between the first connecting rod and the half gear, and the first connecting rod passes through the first connecting ring and the first connecting hole in sequence; a second connecting rod for positioning the moving position of the first connecting plate is arranged on the lock housing, and a second connecting groove for the second connecting rod to slide is opened on the first connecting plate.

5. The automatic lock according to claim 4, characterized in that: The lock housing is provided with a first sliding groove for the limiting structure to slide, and the lock housing is provided with a positioning column for positioning the sliding depth of the limiting structure.

6. The automatic lock according to claim 1, characterized in that: The release mechanism includes a driving arm parallel to the guide rod and having a free end and an abutting end, a second elastic member connecting the abutting end and the lock shell and generating an elastic force toward the free end when the door body is closed; the free end is chamfered toward the closed side of the door body, and the free end of the driving arm is chamfered toward the open side of the door body, and the limiting mechanism is provided with a limiting groove for the guide rod to pass through; the release mechanism also includes a limiting block arranged at the free end of the driving arm, a blocking portion for limiting the complete entry of the limiting block is provided in the lock shell, a sliding block is provided at the end of the driving arm away from the limiting block, and a second sliding groove for the sliding block is provided on the lock shell.

Images