Door lock capable of being locked through self-bouncing

Abstract

The invention discloses a self-bouncing locking door lock, which relates to the technical field of door locks, and comprises an electric clutch mechanism, a main bolt mechanism, an inclined bolt mechanism and a self-bouncing mechanism which are arranged in a lock shell, the electric clutch mechanism comprises a driving piece, a shifting piece, a limiting block, a shifting piece and a linkage plate, the shifting piece is provided with a limiting protrusion, the driving piece is used for driving the limiting block to get close to the shifting piece, one end of the limiting block is connected with one end of the shifting piece through a first rotating shaft, the handle is rotatably sleeved with the middle of the shifting piece, and the other end of the shifting piece abuts against the latch bolt lock; the linkage plate is tightly arranged on the shifting piece in a matched mode, and the linkage plate is connected with the main tongue mechanism in an engaged mode. The structure of the limiting block and the limiting protrusion is more reasonable and ingenious, the bearing pressure is far smaller than that of a bolt structure, structural damage can be greatly reduced, and therefore the service life of the door lock is guaranteed; according to the door lock, the main tongue mechanism can be automatically locked while the door is closed, full-automatic locking is achieved, the locking time of a user is saved, and the use experience feeling is better.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, in particular to a self-locking door lock. Background Art

[0002] Smart door locks are improved upon traditional mechanical locks and are more intelligent and simple in terms of user security, identification, and management. Existing smart door locks have the following shortcomings in terms of convenience and quality: 1. Existing smart door locks usually include multiple tongue locks such as a main tongue lock and a tilt tongue lock. Usually, the tilt tongue lock can be locked automatically, that is, when the door is closed, the tilt tongue lock can be automatically retracted and then popped out to achieve automatic locking; while the main tongue lock usually needs to be manually extended through a handle to achieve the locking of the main tongue lock.

[0003] The method of manually locking the main tongue lock using a handle takes a long time to lock. Users usually do not manually lock the main tongue lock due to being in a hurry to go out, resulting in the main tongue lock being abandoned and the main tongue lock design not being able to play its original function.

[0004] Second, the electric clutch structure of existing smart door locks usually uses a latch structure to unlock or lock. The latch connects the handle and the transmission part to achieve a linkage effect. When the handle is turned, the latch is under great pressure. Therefore, after long-term use, the latch is easy to break, and the service life is short, resulting in inferior products.

[0005] Therefore, the structure of the smart door lock needs to be further optimized. Summary of the Invention

[0006] The invention discloses a self-locking door lock, which solves the technical problems of low intelligence and easy damage.

[0007] In order to solve the above technical problems, the present invention proposes the following optimization technical solutions: A self-locking door lock comprises an electric clutch mechanism, a main tongue mechanism, a tilted tongue mechanism and a self-elastic mechanism arranged in a lock housing, wherein the main tongue mechanism, the tilted tongue mechanism and the self-elastic mechanism can be retracted into or extended from the lock housing, and the self-elastic mechanism connects the main tongue mechanism and the tilted tongue mechanism; The electric clutch mechanism includes a driving member, a toggle member, a limit block, a paddle, and a linkage plate. The toggle member is used to connect to the handle, and the toggle member is provided with a limit protrusion. The driving member is used to drive the limit block to approach the toggle member. One end of the limit block and one end of the paddle are connected by a first rotating shaft. The middle portion of the paddle is rotatably sleeved on the handle, and the other end abuts against the oblique tongue lock. The linkage plate is tightly fitted on the toggle member and is meshed with the main tongue mechanism. When the door is opened from the outside, the driving member drives the limit block to approach the toggle assembly, and the handle is rotated so that the limit protrusion pushes the limit block, and the limit block drives the paddle to rotate with the handle, so that the other end of the paddle pushes the latch bolt lock to retract the latch bolt mechanism into the lock housing; When the door is opened from the inside, the electric clutch mechanism is rotated by the handle, and the other end of the paddle pushes the latch bolt lock to retract the latch bolt mechanism into the lock housing, and the linkage plate drives the main bolt mechanism to retract into the lock housing; When the door is closed, the self-elastic mechanism retracts into the lock housing, the oblique tongue mechanism extends out of the lock housing, and the main tongue mechanism is driven to extend out of the lock housing by the self-elastic mechanism.

[0008] Furthermore, the shifting member includes an upper shifting member and a lower shifting member, and the shifting piece is arranged between the upper shifting member and the lower shifting member.

[0009] Furthermore, the electric clutch mechanism further includes a first torsion spring, which is connected to the first rotating shaft and is used for resetting the limit block.

[0010] Furthermore, the self-elastic mechanism includes a self-elastic tongue, a transmission assembly and a linkage member, one end of the transmission assembly is connected to the self-elastic tongue, and the other end is used to abut against the linkage member, the middle part of the linkage member is rotatably sleeved on the second rotating shaft of the lock housing, and one end is hooked on the linkage rotary disk; When the door is closed, the self-elastic tongue retracts into the lock housing, and the transmission assembly drives the linkage member to release the linkage turntable.

[0011] Furthermore, the self-elastic tongue is connected to a first connecting rod, and the first connecting rod is connected to the transmission assembly.

[0012] Furthermore, the transmission assembly includes a locking member, a transmission rod and a pushing member, the middle portion of the locking member is rotatably sleeved on the third rotating shaft of the lock housing, one end of the locking member is connected to the first connecting rod, and the other end is used to resist the transmission rod, the transmission rod is slidably arranged in the lock housing, the transmission rod is sleeved on the fourth rotating shaft of the lock housing through a second torsion spring, one end of the pushing member is rotatably sleeved on the fifth rotating shaft of the latch tongue, and the other end is used to push the linkage member, and the fifth rotating shaft is sleeved with a third torsion spring; When the self-elastic tongue is retracted into the lock housing, the first connecting rod drives the locking member to rotate about the third rotating shaft, the locking member releases the transmission rod, and the transmission rod is reset by the second torsion spring to release the pushing member. The pushing member is rotated by the third torsion spring and presses against the linkage member. The inclined tongue mechanism extends out of the lock housing and drives the linkage member to push the linkage member, so that the linkage member releases the linkage turntable.

[0013] Furthermore, a pushing portion is provided at one end of the linkage member, and the pushing portion is used for the inclined tongue mechanism to abut against it.

[0014] Furthermore, the other end of the linkage member is provided with a hook, and the linkage turntable is provided with a protrusion; When the self-elastic tongue extends out of the lock housing, the hook portion hooks the protrusion.

[0015] Furthermore, the inclined tongue mechanism includes an inclined tongue, a second connecting rod, a linkage part and a fourth torsion spring, one end of the second connecting rod is connected to the inclined tongue, and the other end is connected to the linkage part, the linkage part is used for the electric clutch mechanism to rest thereon, the fourth torsion spring is connected to the linkage part, and the inclined tongue can retract or extend into or out of the lock housing.

[0016] Furthermore, the main tongue mechanism includes a linkage turntable, a limit turntable, a main tongue member and a fifth torsion spring. The linkage turntable and the limit turntable are respectively rotatably connected to the first rotating shaft of the lock housing. The fifth torsion spring is mounted on the linkage turntable. The self-elastic mechanism hooks the linkage turntable. The main tongue member is slidably arranged in the lock housing. The main tongue member is provided with a main tongue. The limit turntable presses against the main tongue member to retract the main tongue into the lock housing. The linkage turntable is provided with a first linkage rod, and the limit turntable is provided with a second linkage rod. The second linkage rod presses against the first linkage rod. The electric clutch mechanism is used to drive the limit turntable to rotate so that the second linkage rod releases the main tongue member.

[0017] The present invention has the following beneficial effects compared to the prior art: The limiting protrusion cooperates with the limiting block, and the limiting block is driven by the driving member to approach the limiting protrusion. When the handle is turned, the limiting protrusion pushes the limiting block, and the limiting block causes the other end of the paddle to push the latch mechanism into the lock housing, thereby achieving unlocking or locking. The limiting block and limiting protrusion structure is more reasonable and ingenious, and the pressure it withstands is far less than that of the latch structure, which can greatly reduce structural damage and thus ensure the service life of the door lock. 2. A self-rebound mechanism is provided. When the door is closed, the self-rebound mechanism is retracted into the lock shell due to the pressure against the door frame. At this time, the self-rebound mechanism presses against the inclined bolt mechanism. During the door closing process, the inclined bolt mechanism first retracts into the lock shell and then extends out of the lock shell. When extending the lock shell, the inclined bolt mechanism drives the self-rebound mechanism to disengage from the main bolt mechanism. The main bolt mechanism resets and extends out of the lock shell, thereby achieving the locking effect. The main bolt mechanism can be automatically locked while the door is closed, realizing fully automatic locking, saving users time in locking and providing a better user experience. 3. When opening the door from the inside, turning the handle can drive the main tongue mechanism and the inclined tongue mechanism to retract into the lock housing to complete the unlocking. That is, if the self-elastic mechanism fails, the door can still be opened from the inside, which plays a fault-proof role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the electric clutch mechanism of the present invention.

[0020] Figure 3 It is a top view of the electric clutch mechanism of the present invention.

[0021] Figure 4 It is a bottom view of the electric clutch mechanism of the present invention.

[0022] Figure 5 It is a top view of the connection structure of the main tongue mechanism, the oblique tongue mechanism, and the self-elastic mechanism of the present invention.

[0023] Figure 6 It is a bottom view of the connection structure of the main tongue mechanism, the oblique tongue mechanism, and the self-elastic mechanism of the present invention.

[0024] Figure 7 It is a structural explosion diagram of the electric clutch mechanism of the present invention.

[0025] Figure 8 It is a structural explosion diagram of the main tongue mechanism of the present invention.

[0026] In the figure: 100, lock housing; 200, electric clutch mechanism; 210, driving member; 220, toggle member; 221, limiting protrusion; 222, upper toggle member; 223, lower toggle member; 230, limiting block; 240, paddle; 250, linkage plate; 260, first rotating shaft; 270, fifth torsion spring; 300, main tongue mechanism; 310, linkage rotary disk; 311, protrusion; 312, first linkage rod; 320, limiting rotary disk ; 321, second linkage rod; 330, main tongue member; 331, main tongue; 400, oblique tongue mechanism; 410, oblique tongue; 420, second connecting rod; 430, linkage part; 500, self-elastic mechanism; 510, self-elastic tongue; 511, first connecting rod; 520, positioning member; 530, transmission rod; 531, second torsion spring; 540, pushing member; 550, linkage member; 551, pushing part; 552, hook part. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] See also Figures 1-8 A self-locking door lock includes an electric clutch mechanism 200, a main tongue mechanism 300, a tilted tongue mechanism 400 and a self-elastic mechanism 500 arranged in a lock housing 100. The electric clutch mechanism 200 is used to connect a handle or a clutch. The main tongue mechanism 300, the tilted tongue mechanism 400 and the self-elastic mechanism 500 can all be retracted or extended into or out of the lock housing 100. The self-elastic mechanism 500 connects the main tongue mechanism 300 and the tilted tongue mechanism 400.

[0029] See also Figure 4-Figure 6 The electric clutch mechanism 200 includes a driving member 210, a toggle member 220, a limit block 230, a paddle 240 and a linkage plate 250. The toggle member 220 is used to connect the handle. The toggle member 220 is provided with a limit protrusion 221. The driving member 210 is used to drive the limit block 230 to approach the toggle member 220. One end of the limit block 230 and one end of the paddle 240 are connected by a first rotating shaft 260. The middle part of the paddle 240 can be rotatably sleeved on the handle, and the other end abuts against the oblique tongue lock. The linkage plate 250 is tightly matched on the toggle member 220, and the linkage plate 250 is engaged with the main tongue mechanism 300.

[0030] When the door is opened from the outside, when the driving member 210 drives the limit block 230 to approach the toggle assembly, the handle is rotated so that the limit protrusion 221 pushes the limit block 230. At this time, the limit block 230 pushes the paddle 240 to push the paddle 240, but because the paddle 240 is mounted on the handle, the paddle 240 rotates with the handle so that the other end of the paddle 240 pushes the latch bolt lock. Specifically, the latch bolt lock is slidably arranged in the lock housing 100. The paddle 240 pushes the latch bolt lock, and the latch bolt lock moves and retracts into the lock housing 100, thereby achieving unlocking.

[0031] When the door is opened from the inside, the electric clutch mechanism 200 is rotated by the handle, specifically, the other end of the paddle pushes the inclined bolt lock to retract the inclined bolt mechanism 400 into the lock housing 100, and the linkage plate 250 drives the main bolt mechanism 300 to retract into the lock housing 100; that is, the self-elastic mechanism 500 hooks the linkage turntable 310 of the main bolt mechanism 300, and can still drive the limit turntable 320 to rotate through the linkage plate 250, and the limit turntable 320 drives the main bolt member 330 to retract into the lock housing 100, thereby realizing opening the door from the interior.

[0032] When the door is closed, the self-elastic mechanism 500 is squeezed by the door frame and retracted into the lock shell 100. At this time, the self-elastic mechanism 500 presses against the inclined bolt mechanism 400. The inclined bolt mechanism 400 retracts into the lock shell 100 at the moment of closing the door and then extends out of the lock shell 100. When extending, the inclined bolt mechanism 400 drives the main bolt mechanism 300 to extend out of the lock shell 100 through the self-elastic mechanism 500, thereby realizing automatic locking of the main bolt mechanism 300 according to the self-elastic mechanism 500.

[0033] To supplement, the driving member 210 is an electrically controlled driving structure, such as a motor and screw structure, specifically a motor connected to a screw, and the screw is connected to a push block, which can be remotely controlled by the door lock button or a mobile phone to open and close the motor. When the motor starts, the motor drives the screw to rotate, and the rotation of the screw moves the push block. The movement of the push block can push the limit block 230 to move the limit block 230 close to the toggle member 220.

[0034] In this embodiment, the shifting member 220 includes an upper shifting member 222 and a lower shifting member 223, and the paddle 240 is disposed between the upper shifting member 222 and the lower shifting member 223. The upper shifting member 222 and the lower shifting member 223 are arranged so that the handle drives the paddle 240 to rotate more stably.

[0035] In this embodiment, the electric clutch mechanism 200 further includes a first torsion spring 270 connected to the first rotating shaft 260 and configured to reset the stop block 230. When the driving member 210 removes the force pushing the stop block 230, the rotating shaft 4 rotates under the force of the torsion spring, causing the other end of the stop block 230 to move away from the toggle member 2202. At this point, when the handle is turned to rotate the toggle member 220, the toggle member 220 idles, meaning that the toggle member 220 neither contacts nor pushes the stop block 230, preventing the lock from being unlocked.

[0036] In this embodiment, see Figure 2-Figure 3 The self-elastic mechanism 500 includes a self-elastic tongue 510, a transmission assembly and a linkage member 550. One end of the transmission assembly is connected to the self-elastic tongue 510, and the other end is used to abut against the linkage member 550. The middle part of the linkage member 550 is rotatably sleeved on the second rotating shaft of the lock housing 100, and one end is hooked on the linkage rotary disk 310. When closing the door, the self-elastic tongue 510 is squeezed by the door frame and retracted into the lock shell 100, and the transmission assembly drives the linkage member 550 to release the linkage turntable 310. Specifically, the transmission assembly pushes one end of the linkage member 550. At this time, the linkage member 550 rotates about the second shaft, and the other end of the linkage member 550 moves away from the linkage turntable 310 and releases the linkage turntable 310, so that the linkage turntable 310 rotates under the action of the fifth torsion spring 270. The linkage turntable 310 rotates to drive the main tongue 331 to extend out of the lock shell 100 to achieve locking.

[0037] In this embodiment, the self-ejecting tongue 510 is connected to a first connecting rod 511, which is connected to the transmission assembly. A guide structure is provided within the lock housing 100. The guide structure has a notch through which the first connecting rod passes. The notch serves to guide the first connecting rod 511, ensuring translation of the first connecting rod 511 when the self-ejecting tongue retracts and extends into and out of the lock housing.

[0038] In this embodiment, the transmission assembly includes a locking member 520, a transmission rod 530 and a pushing member 540. The middle portion of the locking member 520 is rotatably sleeved on the third rotating shaft of the lock housing 100, one end of which is connected to the first connecting rod 511, and the other end is used to resist the transmission rod 530. The transmission rod 530 is slidably disposed in the lock housing 100. The transmission rod 530 is sleeved on the fourth rotating shaft of the lock housing 100 via a second torsion spring. One end of the pushing member 540 is rotatably sleeved on the fifth rotating shaft of the latch bolt mechanism 400, and the other end is used to push the linkage member 550. The fifth rotating shaft is sleeved with a third torsion spring. When the self-elastic tongue 510 is retracted into the lock housing 100, the first connecting rod 511 drives the locking member 520 to rotate about the third rotating shaft. At this time, the locking member 520 releases the transmission rod 530, and the transmission rod 530 is reset by the second torsion spring to release the pushing member 540. Specifically, the transmission rod 530 moves in the direction away from the pushing member 540. At this time, the pushing member 540 is reset and rotated by the third torsion spring and abuts against the linkage member 550. Specifically, under the action of the third torsion spring, the pushing member 540 approaches and partially abuts against the linkage member 550. When the door is closed, After the inclined bolt mechanism 400 is retracted into the lock housing 100, it is extended out of the lock housing 100. Since the pushing member 540 is provided on the inclined bolt mechanism 400, when the inclined bolt mechanism 400 is extended out of the lock housing 400, the pushing member 540 is driven to move. When the pushing member 540 moves, the pushing member 540 is driven to push the linkage member 550. Specifically, the pushing member 540 pushes one end of the linkage member 550, and the linkage member 550 rotates. The other end of the linkage member 550 releases the linkage turntable 510. Under the action of the fifth torsion spring 270, the linkage turntable 510 extends the main tongue 331 out of the lock housing 100 to achieve locking.

[0039] In this embodiment, one end of the linkage member 550 is provided with a push portion 551, against which the latch mechanism 400 abuts. When the latch mechanism 400 drives the push member 540 to move, the push member 540 abuts against the push portion on the linkage member 550, thereby enabling the push member 540 to push one end of the linkage member 550.

[0040] In this embodiment, the other end of the linkage member 550 is provided with a hook portion 552, and the linkage rotary disk 310 is provided with a protrusion 311. When the self-ejecting tongue 330 extends from the lock housing 100, the hook portion 552 hooks onto the protrusion 311. When the self-ejecting tongue 330 extends from the lock housing 100, the hook portion 552 hooks onto the protrusion 311. When the self-ejecting tongue 330 retracts into the lock housing 100, the transmission assembly pushes the linkage member 550 to rotate about the second rotation axis, and the hook portion 552 disengages from the protrusion 311.

[0041] In this embodiment, see Figure 2-Figure 3 The latch bolt mechanism 400 includes a latch bolt 410, a second connecting rod 420, a linkage portion 430, and a fourth torsion spring. The second connecting rod 420 is connected to the latch bolt 410 at one end and to the linkage portion 430 at the other end. The linkage portion 430 is used for the paddle of the electric clutch mechanism to abut against. The fourth torsion spring is connected to the linkage portion 430, allowing the latch bolt 410 to retract or extend into the lock housing 100. When the door is closed, the latch bolt 410 is squeezed by the door frame and retracts into the lock housing 100. The fourth torsion spring is used to return the latch bolt 410 to its original position when it is not squeezed.

[0042] In this embodiment, see Figure 2 、 Figure 3 and Figure 8 The main tongue mechanism 300 includes a linkage turntable 310, a limit turntable 320, a main tongue member 330 and a fifth torsion spring 270. The linkage turntable 310 and the limit turntable 320 are respectively rotatably sleeved on the first rotating shaft of the lock housing 100. The fifth torsion spring 270 is sleeved on the linkage turntable 310. The self-elastic mechanism 500 hooks the linkage turntable 310. The main tongue member 330 is slidably arranged in the lock housing 100. 10 is provided with a main tongue 311, and the limiting turntable 320 abuts against the main tongue 310 to retract the main tongue 311 into the lock housing 100; the linkage turntable 310 is provided with a first linkage rod 312, and the limiting turntable 320 is provided with a second linkage rod 321, and the second linkage rod 321 abuts against the first linkage rod 312; the electric clutch mechanism 200 is used to drive the limiting turntable 320 to rotate so that the second linkage rod 321 releases the main tongue 330.

[0043] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A self-locking door lock, characterized in that: It includes an electric clutch mechanism, a main tongue mechanism, a tilted tongue mechanism and a self-elastic mechanism arranged in the lock housing, wherein the main tongue mechanism, the tilted tongue mechanism and the self-elastic mechanism can be retracted into or extended from the lock housing, and the self-elastic mechanism is used to abut against the tilted tongue mechanism and hook the main tongue mechanism; The electric clutch mechanism includes a driving member, a toggle member, a limit block, a paddle, and a linkage plate. The toggle member is used to connect to the handle, and the toggle member is provided with a limit protrusion. The driving member is used to drive the limit block to approach the toggle member. One end of the limit block and one end of the paddle are connected by a first rotating shaft. The middle portion of the paddle is rotatably sleeved on the handle, and the other end abuts against the oblique tongue lock. The linkage plate is tightly fitted on the toggle member and is meshed with the main tongue mechanism. When the door is opened from the outside, the driving member drives the limit block to approach the toggle assembly, and the handle is rotated so that the limit protrusion pushes the limit block, and the limit block drives the paddle to rotate with the handle, so that the other end of the paddle pushes the latch bolt lock to retract the latch bolt mechanism into the lock housing; When the door is opened from the inside, the electric clutch mechanism is rotated by the handle, the other end of the paddle pushes the oblique tongue mechanism to retract into the lock housing, and the linkage plate drives the main tongue mechanism to retract into the lock housing; When the door is closed, the self-elastic mechanism retracts into the lock housing, the oblique tongue mechanism extends out of the lock housing, and the main tongue mechanism is driven to extend out of the lock housing by the self-elastic mechanism.

2. A self-locking door lock according to claim 1, characterized in that: The shifting member includes an upper shifting member and a lower shifting member, and the shifting piece is arranged between the upper shifting member and the lower shifting member.

3. The self-locking door lock according to claim 1, characterized in that: The electric clutch mechanism further includes a first torsion spring connected to the first rotating shaft and used for resetting the limit block.

4. The self-locking door lock according to claim 1, characterized in that: The self-elastic mechanism includes a self-elastic tongue, a transmission assembly and a linkage member, one end of the transmission assembly is connected to the self-elastic tongue, and the other end is used to abut the linkage member, the middle part of the linkage member is rotatably sleeved on the second rotating shaft of the lock housing, and one end is hooked on the linkage rotary disk; When the door is closed, the self-elastic tongue retracts into the lock housing, and the transmission assembly drives the linkage member to release the linkage turntable.

5. The self-locking door lock according to claim 4, characterized in that: The self-elastic tongue is connected to a first connecting rod, and the first connecting rod is connected to the transmission assembly.

6. A self-locking door lock according to claim 4, characterized in that: The transmission assembly includes a positioning member, a transmission rod and a pushing member. The middle portion of the positioning member is rotatably sleeved on the third rotating shaft of the lock housing, one end of the positioning member is connected to the first connecting rod, and the other end is used to resist the transmission rod. The transmission rod is slidably arranged in the lock housing, and the transmission rod is sleeved on the fourth rotating shaft of the lock housing through a second torsion spring. One end of the pushing member is rotatably sleeved on the fifth rotating shaft of the latch bolt mechanism, and the other end is used to push the linkage member. The fifth rotating shaft is sleeved with a third torsion spring. When the self-elastic tongue is retracted into the lock housing, the first connecting rod drives the locking member to rotate about the third rotating shaft, the locking member releases the transmission rod, and the transmission rod is reset by the second torsion spring to release the pushing member. The pushing member is rotated by the third torsion spring and presses against the linkage member. The inclined tongue mechanism extends out of the lock housing and drives the linkage member to push the linkage member, so that the linkage member releases the linkage turntable.

7. The self-locking door lock according to claim 4, characterized in that: One end of the linkage member is provided with a pushing portion, and the pushing portion is used for the inclined tongue mechanism to rest thereon.

8. The self-locking door lock according to claim 4, characterized in that: The other end of the linkage member is provided with a hook, and the linkage rotating disk is provided with a bulge; when the self-elastic tongue extends out of the lock housing, the hook hooks the bulge.

9. The self-locking door lock according to claim 1, characterized in that: The inclined tongue mechanism includes an inclined tongue, a second connecting rod, a linkage part and a fourth torsion spring. One end of the second connecting rod is connected to the inclined tongue, and the other end is connected to the linkage part. The linkage part is used for the electric clutch mechanism to rest against it. The fourth torsion spring is connected to the linkage part. The inclined tongue can be retracted into or extended out of the lock housing.

10. The self-locking door lock according to claim 1, characterized in that: The main tongue mechanism includes a linkage turntable, a limit turntable, a main tongue member and a fifth torsion spring. The linkage turntable and the limit turntable are respectively rotatably connected to the first rotating shaft of the lock housing. The fifth torsion spring is mounted on the linkage turntable. The self-elastic mechanism hooks the linkage turntable. The main tongue member is slidably arranged in the lock housing. The main tongue member is provided with a main tongue. The limit turntable presses against the main tongue member to retract the main tongue into the lock housing. The linkage turntable is provided with a first linkage rod, and the limit turntable is provided with a second linkage rod. The second linkage rod presses against the first linkage rod. The electric clutch mechanism is used to drive the limit turntable to rotate so that the second linkage rod releases the main tongue member.

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