An automatic lock

Abstract

The application provides an automatic lock and belongs to the technical field of locks. The automatic lock solves the problems of safety hazards and the like in locking of the existing automatic lock. The automatic lock comprises a lock body, a lock tongue, a lock tongue plate, a latch, a latch plate, a locking mechanism and a quick locking mechanism. The locking mechanism comprises a hook, a pin and a locking torsion spring. The hook is arranged on the lock tongue plate, and the pin is arranged on the lock body. The hook can hook the pin to fix the lock tongue plate. The quick locking mechanism comprises a pin, a guide hook and a rotary spring. The pin is arranged on the lock body, the guide hook is rotatably arranged on the latch plate, and the two ends of the rotary spring are connected with the guide hook and the pin respectively. A pulling hook is arranged on the guide hook. The guide hook can move with the latch plate and rotate simultaneously to make the pulling hook hook the hook. The latch is ejected, and the pulling hook drives the hook to rotate to be separated from the pin, so that the lock tongue is ejected. The automatic lock has the advantage that the lock tongue can be ejected and locked by pressing the latch when the door is closed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lock, and particularly relates to an automatic lock. BACKGROUND

[0002] The existing automatic lock generally comprises a latch bolt and a lock bolt. After closing the door, the latch bolt is automatically ejected, and the lock bolt needs to be ejected by a key or a handle. However, people may forget to lock the lock bolt when they leave, which may cause safety hazards. SUMMARY

[0003] The present application aims at the above-mentioned defects of the existing automatic lock, and provides an automatic lock which can eject the lock bolt by pressing the latch bolt.

[0004] The object of the present application can be achieved by the following technical scheme:

[0005] An automatic lock comprises a panel, a lock body, a lock bolt, a lock bolt plate, a latch bolt and a latch bolt plate. The lock bolt is fixedly connected with the lock bolt plate and can be extended or retracted from a lock bolt hole on the panel. The latch bolt is fixedly connected with the latch bolt plate and can be extended or retracted from a latch bolt hole on the panel. The lock body is provided with a first push assembly and a second push assembly for extending the lock bolt and the latch bolt, respectively. The automatic lock further comprises a locking mechanism and a quick locking mechanism. The locking mechanism comprises a hook, a locking pin and a locking torsion spring. The hook is rotatably arranged on the lock bolt plate, and the locking torsion spring is rotatably arranged on the lock bolt plate and elastically abuts between the hook and the lock bolt plate. The locking pin is arranged on the lock body. When the lock bolt is retracted, the hook can hook the locking pin and tightly hook the locking pin under the action of the locking torsion spring, so as to fix the lock bolt plate. The quick locking mechanism comprises a push pin, a guide hook and a rotary spring. The push pin is arranged on the lock body. One side of the guide hook is rotatably arranged on the latch bolt plate, and the other side of the end is connected with one end of the rotary spring. The other end of the rotary spring is connected with the push pin on the side of the guide hook. The other end of the guide hook extends along the retraction direction of the latch bolt and is provided with a pull hook. The side of the guide hook on the push pin is provided with a guide edge. Under the action of the rotary spring, the guide edge always abuts on the push pin. When the latch bolt is pressed to retract into the lock body, the latch bolt plate moves relative to the push pin. Through the limiting action of the push pin, the guide hook moves with the latch bolt plate and rotates under the action of the guide edge. Until the pull hook hooks the hook, the latch bolt is released, the latch bolt is ejected under the action of the second push assembly and is separated from the locking pin by rotating the hook under the action of the pull hook. The lock bolt plate drives the lock bolt to eject under the action of the first push assembly.

[0006] In the automatic lock, the locking mechanism further comprises a clamping plate and a tension spring, two ends of the tension spring are connected to the lock body and the clamping plate respectively and are in a stretched state, the clamping plate is connected to the lock body through a limiting structure, under the action of the limiting structure, the clamping plate can only move back and forth relative to the lock body in a direction perpendicular to the direction of movement of the lock tongue, the lock tongue plate is provided with a sliding block, the lock body is provided with a sliding groove for sliding of the sliding block, the clamping plate is provided with a movable slot for passing of the sliding block at a position corresponding to the sliding groove, the extending directions of the sliding groove and the movable slot are consistent with the direction of movement of the lock tongue, both ends of the movable slot are provided with a positioning notch, the two positioning notches on the same movable slot are located on the same side of the movable slot, when the lock tongue switches between the locked state and the unlocked state, the sliding block will move from the positioning notch at one end of the movable slot into the positioning notch at the other end, and when the sliding block slides out of the positioning notch, the clamping plate will be pushed to move in the direction of stretching the tension spring, and when the sliding block slides into the positioning notch, the clamping plate will move in the direction of compressing the tension spring to reset under the action of the tension spring.

[0007] In the automatic lock, the limiting structure comprises a limiting groove and a limiting column, the limiting groove is arranged on the clamping plate, and the limiting column is located in the limiting groove and fixed on the lock body, the extending direction of the limiting groove is perpendicular to the direction of movement of the lock tongue.

[0008] In the automatic lock, the lock tongue plate is provided with a clamping notch, the clamping notch is in the shape of "7", the clamping hook is located at the upper part of the "7", the clamping hook is provided with a hook groove, when the lock tongue is retracted, through cooperation of movement of the clamping plate and movement of the lock tongue plate, the clamping pin slides into the clamping notch from the lower part of the "7" relative to the clamping notch and rotates the clamping hook to the direction of increasing torsion of the clamping torsion spring in the sliding process, until the clamping hook falls into the hook groove, the hook groove limits movement of the clamping pin with the clamping plate in the direction of stretching the tension spring, so as to fix the lock tongue plate.

[0009] In the automatic lock, the latch plate is provided with a limiting piece, a limiting gap is left between the limiting piece and the latch plate to prevent the pulling hook of the guide hook from being lifted up, and the guide hook always moves in the limiting gap.

[0010] In the automatic lock, the guide edge is in an arc shape.

[0011] In the automatic lock, the pulling hook comprises a plurality of hook teeth.

[0012] In the automatic lock, the automatic lock further comprises a rotating assembly, the rotating assembly comprises a transmission gear, a driving gear, a yoke and a yoke piece, the transmission gear is fixedly connected with the driving gear and is rotatably arranged on the lock body through a rotating shaft, the driving gear is used for connecting a lock cylinder, one end of the yoke is provided with external teeth and is externally meshed with the transmission gear, the other end of the yoke is concentrically rotatably arranged on the lock body with the yoke piece, and rotating centers of the yoke and the yoke piece are provided with a square hole rotating part for connecting a handle, the yoke, the yoke piece and the square hole rotating part are connected through a clutch structure, the lock body is provided with a yoke closing position and a yoke opening position, when the yoke is located at the yoke closing position, a latch bolt is in a locking state, the handle is rotatable through the square hole rotating part to open the lock and can drive the yoke piece and the yoke to synchronously rotate, when the yoke is located at the yoke opening position, the latch bolt is in an unlocking state, the handle is rotatable through the square hole rotating part to open the lock and can drive the yoke piece to rotate alone, the yoke piece is provided with a yoke pin, the yoke pin is arranged on the latch bolt and can rotate with the yoke piece to drive the latch bolt to move and retract, when the latch bolt is ejected under the action of the second thrust assembly, the yoke pin can reversely drive the yoke piece to reset.

[0013] In the automatic lock, the clutch structure comprises a clutch part, the clutch part is concentrically arranged with the square hole rotating part, the yoke and the yoke piece, the yoke is fixed on the clutch part, the clutch part, the yoke and the yoke piece all have circular and same-sized inner holes, the clutch part, the yoke and the yoke piece are all provided with two symmetrically arranged inner convex limit points on the inner holes, the limit points on the clutch part and the yoke are coincident in projection along a center line of the inner hole, the square hole rotating part is located in the inner holes, the two limit points in the same inner hole are arranged on two sides of the square hole rotating part, the square hole rotating part can rotate in the range between the two limit points or push the limit points to synchronously rotate by abutting against the limit points, when the clutch part is located at the yoke closing position, the two limit points on the clutch part and the two limit points on the yoke piece are coincident in projection along the center line of the inner hole, when the clutch part is located at the yoke opening position, the two limit points on the clutch part and the two limit points on the yoke piece are symmetrically arranged in projection along the center line of the inner hole.

[0014] In the automatic lock, the yoke pin and the rotating assembly are arranged on two sides of the guide hook.

[0015] In the automatic lock, the first thrust assembly comprises a first guide rod and a first spring, one end of the first guide rod is fixed on the lock body, the other end of the first guide rod is arranged through the latch bolt, an extension direction of the first guide rod is consistent with an extension direction of the latch bolt, the first spring is sleeved on the first guide rod and is compressed between the latch bolt and the lock body, the first thrust assembly has two groups, the driving gear is located between the two groups of the first thrust assembly, the rotating shaft is provided with a balance torsion spring, the lock body is provided with a positioning pin, one end of the balance torsion spring is connected to the positioning pin, the other end of the balance torsion spring is connected to the driving gear, an acting force of the balance torsion spring makes the driving gear have a tendency to rotate in a direction of driving the latch bolt to extend, the acting force gradually increases in the process of extending the latch bolt.

[0016] In the automatic lock, the total force of the two first springs and the balance torsion spring acting on the lock tongue plate is constant.

[0017] In the automatic lock, a damper is further arranged on the lock tongue plate, and a damping rod is arranged on the damper, one end of the damping rod extending out of the damper and abutting against the panel, the extending direction of the damping rod being consistent with the moving direction of the lock tongue plate.

[0018] In the automatic lock, an insurance mechanism is further arranged on the lock body, the insurance mechanism comprising an insurance block and an insurance spring, the insurance block being rotatably arranged on the lock body, a clamping point being arranged on the clamping plate, a knob being arranged on the insurance block, the knob being capable of abutting against the clamping point, and the two ends of the insurance torsion spring being connected with the insurance block and the lock body respectively, the torsion force of the insurance torsion spring making the knob abut against the clamping point, thereby fixing the clamping plate.

[0019] In the automatic lock, the knob is in a V shape.

[0020] In the automatic lock, the abutting direction of the knob is crossed with the moving direction of the clamping plate.

[0021] In the automatic lock, the lock body is provided with a top and bottom rod at both ends.

[0022] Compared with the prior art, the automatic lock has compact structure, the locking mechanism locks the lock tongue plate firmly, the lock can be locked quickly by pressing the latch, the locking is convenient, the balance torsion spring can effectively ensure that the lock tongue extends to the position during locking, the locking is reliable, the lock tongue moves stably under the action of the damper, the lock tongue can be effectively prevented from being impacted, the service life is improved, and the noise is reduced, and the insurance mechanism reliably ensures that the lock tongue plate is locked firmly in the locked or unlocked state. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 1 is a structural schematic view of the present application;

[0024] Figure 2 Fig. 2 is a structural schematic view of the quick locking mechanism of the present application;

[0025] Figure 3 Fig. 3 is a structural schematic view of the lock tongue plate of the present application;

[0026] Figure 4 Fig. 4 is a structural schematic view of the clamping plate of the present application;

[0027] Figure 5 Fig. 5 is a structural schematic view of the lock body of the present application;

[0028] Figure 6 Fig. 6 is a structural schematic view of the clutch of the present application.

[0029] In the figure, 1, panel; 2, lock body; 3, lock tongue; 4, lock tongue plate; 5, latch; 6, latch plate; 7, sliding groove; 8, first guide rod; 9, first spring; 10, second guide rod; 11, second spring; 12, transmission tooth; 13, driving tooth; 14, yoke; 15, yoke piece; 16, clutch; 17, square hole rotating member; 18, rotating shaft; 19, hinged plate; 20, push pin; 21, clamping plate; 22, tension spring; 23, clamping hook; 24, clamping pin; 25, clamping torsional spring; 26, limiting groove; 27, limiting column; 28, movable slot; 29, positioning notch; 30, clamping notch; 31, guide hook; 32, rotating spring; 33, balanced torsional spring; 34, damper; 35, damping rod; 36, safety block; 37, safety spring; 38, push head; 39, clamping point; 40, limiting point; 41, sliding block; 42, clutch piece. DETAILED DESCRIPTION

[0030] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0031] As Figure 1 shown, the automatic lock provided by the present application comprises a panel 1, a lock body 2, a lock tongue 3, a lock tongue plate 4, a latch 5, a latch plate 6, a lock cylinder and a rotating assembly, and the lock body 2 is further provided with a locking mechanism and a quick locking mechanism. The panel 1 is arranged at the front end of the lock body 2, and the panel 1 is provided with a lock tongue hole 3 and a latch hole 5. The lock tongue 3 is fixed at the front end of the lock tongue plate 4, and the lock tongue plate 4 is provided with a sliding block 41 at the bottom surface of each of the left and right ends. The lock body 2 is provided with a sliding groove 7 corresponding to the sliding block 41, and the left and right ends of the lock tongue plate 4 are further provided with a first thrust assembly, as Figure 5 shown, the first thrust assembly comprises a first guide rod 8 and a first spring 9 sleeved on the first guide rod 8. One end of the first guide rod 8 is fixed on the lock body 2, and the other end is arranged through the lock tongue plate 4. The extension direction of the first guide rod 8 is consistent with the extension direction of the lock tongue 3. The first spring 9 is compressed and elastically abuts between the lock body 2 and the lock tongue plate 4. The first spring 9 can push the lock tongue plate 4 to drive the lock tongue 3 to move forward and extend out of the lock tongue hole 3. The latch plate 6 is provided with a guide groove, and the lock body 2 is provided with a guide column arranged through the guide groove. The opening direction of the guide groove is consistent with the movement direction of the latch 5. The guide column and the guide groove not only have a guiding effect on the movement direction of the latch plate 6, but also limit the limit moving positions of the latch plate 6 before and after. A second thrust assembly is arranged between the latch plate 6 and the lock body 2. The second thrust assembly comprises a second guide rod 10 and a second spring 11 sleeved on the second guide rod 10. One end of the second guide rod 10 is fixed on the lock body 2, and the other end is arranged through the latch plate 6. The extension direction of the second guide rod 10 is consistent with the extension direction of the latch 5. The second spring 11 is compressed and elastically abuts between the lock body 2 and the latch plate 6. The first guide rod 8 and the second guide rod 10 are parallel.

[0032] The rotating assembly is arranged in the middle of the lock body 2 between the two first guide rods 8, and comprises a transmission gear 12, a driving gear 13, a shifting fork 14, a shifting piece 15, a clutch 16 and a square hole rotating member 17. The transmission gear 12 and the driving gear 13 are fixedly connected in sequence and rotatably arranged on the lock body 2 through a rotating shaft 18. The bottom surface of the driving gear 13 is provided with a hinged plate 19, the two ends of the hinged plate 19 are respectively hinged to the driving gear 13 and the latch plate 4. The driving gear 13 can drive the latch plate 4 to move forward and backward through the hinged plate 19. The lock cylinder is arranged above the left side of the driving gear 13. The lock cylinder is provided with a gear which is externally engaged with the driving gear 13. The gear can be rotated by a key, thereby driving the driving gear 13 to rotate. The shifting fork 14 is provided with external teeth and externally engaged with the transmission gear 12. The other end of the shifting fork 14 is concentrically arranged with the shifting piece 15, the clutch 16 and the square hole rotating member 17. The rotating center of the shifting fork 14 is located above the right side of the transmission gear 12. The square hole rotating member 17 is provided with two members which are arranged in sequence and concentrically arranged. As shown in the figure, the clutch 16 comprises three clutch pieces 42 which are arranged in sequence from top to bottom. The three clutch pieces 42 are fixedly connected through a fixing member. The shifting fork 14 is fixed to the upper clutch piece 42. The upper square hole rotating member 17 is arranged in the inner hole of the shifting fork 14, the upper clutch piece 42 and the middle clutch piece 42. The shifting piece 15 is arranged between the middle clutch piece 42 and the lower clutch piece 42. The lower square hole rotating member 17 is arranged in the inner hole of the shifting piece 15 and the lower clutch piece 42. The inner holes of the clutch piece 42, the shifting fork 14 and the shifting piece 15 are circular and have the same size. Two inner convex limit points 40 are arranged in each inner hole. The center of the square hole rotating member 17 is provided with a square hole which is used to connect the handle square steel. The outer periphery of the square hole rotating member 17 is surrounded by two arc surfaces and two planes. The two arc surfaces and the two planes are respectively symmetrical. The two arc surfaces are concentric and surrounded to form a circle whose diameter is adapted to the inner hole diameter of the shifting piece 15. The two limit points 40 in the same inner hole are arranged on the two sides of the square hole rotating member. The square hole rotating member can rotate in the range between the two limit points 40 or push the limit points 40 to rotate synchronously by leaning on the limit points 40. Under the connection of the square steel, the positions of the upper and lower square hole rotating members 17 are always consistent. The right end of the shifting piece 15 is provided with a shifting pin 20. The right side of the latch plate 6 is provided with an inner recessed groove. The shifting pin 20 leans on the inner wall of the groove. The clockwise rotation of the shifting piece 15 can drive the latch plate 6 to move, so that the latch 5 is retracted into the lock body 2. When the latch 5 is popped out under the action of the second spring 11, the latch plate 6 can reversely push the shifting pin 20 to make the shifting piece 15 rotate counterclockwise to reset. Figure 6

[0033] ​When the lock tongue 3 and the latch bolt 5 are both extended in the locked state, the limiting points 40 in the hole of the push piece 15 are all against the square hole rotating member 17, and one is located at the right front of the square hole rotating member 17, and the other is located at the left rear of the square hole rotating member 17, and the limiting points 40 of the shift fork 14 and the clutch piece 42 are all located at the same position of the limiting points 40 of the push piece 15, so that the clockwise rotation of the square hole rotating member 17 can make the push piece 15 and the shift fork 14 rotate synchronously, and at this time, the shift fork 14 is in the engaged position; when the lock tongue 3 is retracted in the unlocked state, the latch bolt 5 is extended, and the limiting points 40 in the hole of the push piece 15 are all against the square hole rotating member 17, and one is located at the right front of the square hole rotating member 17, and the other is located at the left rear of the square hole rotating member 17, and the limiting points 40 of the shift fork 14 and the clutch piece 16 are one located at the right rear of the square hole rotating member 17, and the other is located at the left front of the square hole rotating member 17, so that the clockwise rotation of the square hole rotating member 17 can only make the push piece 15 rotate alone, and the shift fork 14 is not moved, and at this time, the shift fork 14 is in the disengaged position.

[0034] The locking mechanism comprises a clamping plate 21, a tension spring 22, a clamping hook 23, a clamping pin 24 and a clamping torsion spring 25. The clamping plate 21 is located at the rear side of the lock body 2, the tension spring 22 is located at the right end of the clamping plate 21, the lock body 2 is provided with a fixed pin, and the two ends of the tension spring 22 are connected to the clamping plate 21 and the fixed pin respectively and are in a stretched state. Figure 4 As shown in the figure, each limiting slot 26 is provided with a limiting column 27, the limiting column 27 is vertically fixed on the lock body 2, the extending direction of the limiting slot 26 is perpendicular to the movement direction of the lock tongue plate 4, that is, extending from left to right, the clamping plate 21 is provided with a movable slot 28 corresponding to the sliding block 41 in one-to-one correspondence at the corresponding position of the sliding block 41, the sliding block 41 passes through the movable slot 28 and the sliding slot 7 in turn from top to bottom, the extending direction of the sliding slot 7 and the movable slot 28 is consistent with the movement direction of the lock tongue 3, the two ends of the movable slot 28 are provided with a positioning notch 29, and the two positioning notches 29 on the same movable slot 28 are located at the left side of the movable slot 28. When the sliding block 41 moves to one end of the movable slot 28, under the action of the above-mentioned elastic force of the tension spring 22, the clamping plate 21 can move rightward along the extending direction of the above-mentioned limiting slot 26 to make the sliding block 41 located in the positioning notch 29 at this end of the movable slot 28 and the sliding block 41 abuts against the positioning notch 29, at this time, the movable slot 28 and the corresponding lower sliding slot 7 are staggered left and right, and the positions of the front and rear positioning notches 29 are the limit positions of the forward and backward movement of the sliding block 41, when the lock tongue 3 is switched from the locked state to the unlocked state, the sliding block 41 will move from the front positioning notch 29 to the rear positioning notch 29, and when the sliding block 41 moves from the positioning notch 29 into the movable slot 28, the clamping plate 21 will be pushed leftward by the movable slot 28, so that the clamping plate 21 will move leftward and rightward once every time the locked and unlocked states are switched.

[0035] The hook 23 is located on the right side of the latch plate 6, as shown in the figure Figure 3 The right end of the hook 23 is pivotally arranged on the latch plate 4, and the latch plate 4 is provided with a clamping notch 30 in the shape of a "7", the hook 23 is located on the upper part of the "7", the hook 23 is provided with a hook groove, the clamping torsion spring 25 is elastically abutted between the hook 23 and the latch plate 4, the clamping pin 24 is fixed on the clamping plate 21, when the latch 3 is retracted, through the cooperation of the movement of the clamping plate 21 and the latch plate 4, that is, the clamping pin 24 moves left and then right with the clamping plate 21, the latch plate 4 moves downward, the clamping pin 24 slides into the clamping notch 30 from the lower part of the "7" to the upper part and in the process of sliding, the hook 23 rotates clockwise to gradually increase the torsion of the clamping torsion spring 25, until it falls into the hook groove of the hook 23 to be locked. Because the lower part of the clamping pin 24 is blocked on the inner wall of the clamping notch 30, the latch plate 4 cannot move forward, the clamping pin 24 needs to move left to be separated from the clamping notch 30, and the hook 23 limits the left movement of the clamping pin 24, so the latch plate 4 can be locked.

[0036] As shown in the figure Figure 1 And Figure 2 The quick locking mechanism includes a guide hook 31 and a rotating spring 32, the front end of the guide hook 31 is pivotally arranged on the latch plate 6 and the left side of the end is connected with one end of the rotating spring 32, the other end of the rotating spring 32 is connected with the tumbler 20 located on the right side of the guide hook 31, the tumbler 20 is located between the front end and the rear end of the guide hook 31, the rear end of the guide hook 31 extends along the direction of the retraction of the latch 3 and is provided with a pulling hook, the pulling hook includes a plurality of hook teeth, the latch plate 6 is provided with a vertical limiting piece, a limiting gap is left between the right side bottom of the limiting piece and the upper surface of the latch plate 6, the guide hook 31 moves in the limiting gap, the right side of the limiting piece extends to the right front to ensure that the guide hook 31 is also located in the limiting gap when it rotates, the limiting gap ensures that the guide hook 31 will not be tilted, the front end of the second guide rod 10 passes through the limiting piece; the guide hook 31 is provided with a guide edge on the side of the tumbler 20, the guide edge is arc-shaped, under the action of the rotating spring 32, the guide edge always leans on the tumbler 20, when the latch 5 is pressed to retract into the lock body 2, through the limiting action of the tumbler 20, the guide hook 31 moves with the latch plate 4 and rotates counterclockwise at the same time under the action of the guide edge, until the pulling hook hooks the above-mentioned hook 23, the latch 5 is released, the latch 5 is ejected under the action of the second spring 11 and at the same time drives the hook 23 to rotate clockwise to be separated from the above-mentioned clamping pin 24, so that the latch plate 4 is ejected under the action of the first spring 9; when the latch 5 is opened by driving the latch plate 6 to move through the above-mentioned tumbler 15, because the tumbler 20 moves with the latch plate 6, the guide hook 31 will not rotate, so it will not be locked.

[0037] Because the elastic force of the two first springs 9 will become smaller when the lock tongue 3 extends, the lock tongue 3 can not extend to the position, the balance torsion spring 33 is arranged on the rotating shaft 18 of the transmission gear 12, the positioning pin is arranged on the lock body 2, one end of the balance torsion spring 33 is hooked on the positioning pin, and the other end is connected to the transmission member, the force of the balance torsion spring makes the transmission member have the tendency to rotate to the direction of driving the lock tongue 3 to extend, the force gradually increases during the extension of the lock tongue 3, the total force of the two first springs 9 and the balance torsion spring 33 acting on the lock tongue plate 4 is always unchanged, the elastic force of the two first springs 9 gradually becomes smaller when the lock tongue 3 extends, and the force of the balance torsion spring 33 gradually increases, so that the lock tongue 3 is ensured to move to the position.

[0038] The damper 34 is further arranged on the lock tongue plate 4, the damping rod 35 is arranged on the damper 34, one end of the damping rod 35 extends forward from the damper 34 and abuts against the panel 1, the damper 34 has the buffering effect on the lock tongue plate 4 during the extension of the lock tongue 3, so that the lock tongue plate 4 moves stably and the lock tongue 3 is prevented from colliding, and the mute effect is achieved.

[0039] The lock body 2 is further provided with the safety mechanism, the safety mechanism comprises the safety block 36 and the safety spring 37, the safety block 36 is located at the left end of the clamping plate 21 and is rotationally arranged on the lock body 2, the clamping plate 21 is provided with the clamping point 39, the poking head 38 is arranged on the safety block 36 and is in the shape of “V”, the poking head 38 can be obliquely downward abutted against the clamping point 39 by counterclockwise rotating the safety block 36, the two ends of the safety torsion spring are connected to the safety block 36 and the limiting column 27 located at the left end of the clamping plate 21 respectively, the torsion force of the safety torsion spring makes the poking head 38 abut against the clamping point 39, so that the clamping plate 21 is fixed and the left and right movement of the clamping plate 21 is limited, and the movement of the lock tongue plate 4 needs the left and right movement of the clamping plate 21 each time, so that the clamping plate 21 is fixed, and the lock tongue plate 4 is also fixed, the clockwise rotating of the safety block 36 makes the poking head 38 leave the clamping point 39, so that the lock is unlocked.

[0040] The lock body 2 is further provided with the heaven and earth rods, when the lock tongue 3 is popped out, the left heaven and earth rod extends leftward, and the right heaven and earth rod extends rightward, when the lock tongue 3 is retracted, the two heaven and earth rods are both retracted inward.

[0041] Working process:

[0042] When the key is unlocked, the latch 14 is in the closed position, the key is rotated, the gear drives the driving teeth 13 and the transmission teeth 12 to rotate counterclockwise, thereby driving the hinged plate 19 to move the lock tongue plate 4 to pull the lock tongue 3, the transmission teeth 12 rotate to make the latch 14 move away from the closed position, so the latch 15 is not moved, the lock tongue 3 is pulled to the position, the latch 14 is in the open position, the outer handle is rotated clockwise to make the latch 15 rotate clockwise alone, thereby pushing the latch plate 6 to move inward during the clockwise rotation of the latch pin 20 on the latch 15, the latch plate 6 is pushed to move inward to pull the latch 5, the door is opened, the outer handle is released, at this time the latch plate 6 is pushed forward by the second spring 11 to make the latch 5 pop out, and the latch plate 6 moves to make the latch 15 rotate counterclockwise to the position through the latch pin 20.

[0043] When the inner handle is unlocked, the latch 14 is in the closed position, the inner handle drives the square hole rotating member 17 to rotate clockwise, the latch 14 and the latch 15 rotate clockwise synchronously, the latch 15 pushes the latch plate 6 to move inward through the latch pin 20 to pull the latch 5, the latch 14 drives the driving teeth 13 to rotate counterclockwise through the transmission teeth 12, thereby driving the hinged plate 19 to move the lock tongue plate 4 to pull the lock tongue 3, when the lock tongue plate 4 moves to the position, the latch plate 6 is pushed forward by the second spring 11 to make the latch 5 pop out, and the latch plate 6 moves to make the latch 15 rotate counterclockwise to the position through the latch pin 20.

[0044] When the door is closed, the latch 5 is pressed to drive the latch plate 6 to move, and at this time the latch 15 is not moved, the guide plate rotates counterclockwise during the movement of the latch plate 6 under the guidance of the latch pin 20, and rotates while moving inward until the hook on the guide plate hooks the catch 23 on the right side of the guide plate, when the latch 5 loses the external force, the latch plate 6 moves in the direction of the latch 5 under the action of the second spring 11, thereby making the catch 23 rotate clockwise to be separated from the catch pin 24 through the hook, at this time the lock tongue plate 4 moves in the direction of the lock tongue 3 under the action of the first spring 9 and drives the catch plate 21 to move leftward, thereby making the catch pin 24 be separated from the above-mentioned catch notch 30, the lock tongue plate 4 drives the lock tongue 3 to pop out smoothly.

[0045] It should be understood that in the claims, the specification and drawings of the present application, all of the "comprises", "comprising", "include", "including" and "contains" are to be construed open-ended, i.e., their meaning is not limited to members, integers or groups of members or integers but includes at least the members, integers or groups of members or integers.

[0046] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. An automatic lock comprising a lock body (2), a lock bolt (3), a lock bolt plate (4), a latch bolt (5) and a latch bolt plate (6), the lock bolt (3) being fixedly connected with the lock bolt plate (4) and the lock bolt (3) being capable of extending out of a lock bolt hole or retracting into the lock bolt hole, the latch bolt (5) being fixedly connected with the latch bolt plate (6) and the latch bolt (5) being capable of extending out of a latch bolt hole or retracting into the latch bolt hole, the lock body (2) being provided with a first push assembly and a second push assembly respectively for extending the lock bolt (3) and the latch bolt (5), characterized in that, The automatic lock further comprises a locking mechanism and a quick locking mechanism. The locking mechanism comprises a hook (23), a pin (24), a locking torsion spring (25), a blocking plate (21) and a tension spring (22). The two ends of the tension spring (22) are connected to the lock body (2) and the blocking plate (21) respectively. The hook (23) is rotatably arranged on the bolt plate (4). The locking torsion spring (25) is rotatably arranged on the bolt plate (4) and is elastically supported between the hook (23) and the bolt plate (4). The pin (24) is fixed on the blocking plate (21). When the bolt (3) is retracted, the hook (23) can hook the pin (24) and hook the pin (24) under the action of the locking torsion spring (25). The quick locking mechanism comprises a push pin (20), a guide hook (31) and a rotary spring (32). The push pin (20) is arranged on the lock body (2). One end of the guide hook (31) is rotatably arranged on the latch plate (6) and connected with one end of the rotary spring (32). The other end of the rotary spring (32) is connected to the push pin (20) on the side of the guide hook (31). The other end of the guide hook (31) is provided with a pull hook. The other end of the guide hook (31) is provided with a guide edge. Under the action of the rotary spring (32), the guide edge is always in contact with the push pin (20). When the latch (5) is pressed and retracted into the lock body (2), the latch plate (6) moves relative to the push pin (20). Through the limiting action of the push pin (20), the guide hook (31) moves with the latch plate (6) and rotates under the action of the guide edge until the pull hook hooks the hook (23). When the latch (5) is released, the latch (5) is ejected under the action of the second thrust assembly and the hook (23) is rotated by the pull hook to disengage the pin (24). The bolt plate (4) drives the bolt (3) to eject under the action of the first thrust assembly.

2. An automatic lock according to claim 1, characterized in that The pull spring (22) is in a stretched state, the clamping plate (21) is connected with the lock body (2) through a limiting structure, under the action of the limiting structure, the clamping plate (21) can only move back and forth relative to the lock body (2) in a direction perpendicular to the movement direction of the latch bolt (3), the latch bolt plate (4) is provided with a sliding block (41), the lock body (2) is provided with a sliding groove (7) for sliding of the sliding block (41), the clamping plate (21) is provided with a movable slot (28) for penetration of the sliding block (41) at a position corresponding to the sliding groove (7), the extension directions of the sliding groove (7) and the movable slot (28) are consistent with the movement direction of the latch bolt (3), both ends of the movable slot (28) are provided with a positioning notch (29), the two positioning notches (29) on the same movable slot (28) are located on the same side of the movable slot (28), when the latch bolt (3) is switched between the locked state and the unlocked state, the sliding block (41) will move from the positioning notch (29) at one end of the movable slot (28) to the positioning notch (29) at the other end, and when the sliding block (41) slides out of the positioning notch (29), the clamping plate (21) will be pushed to move in the direction of stretching the pull spring (22), and when the sliding block (41) slides into the positioning notch (29), the clamping plate (21) will move in the direction of compressing the pull spring (22) under the action of the pull spring (22).

3. An automatic lock according to claim 2, wherein The latch bolt plate (4) is provided with a clamping notch (30), the clamping notch (30) is in the shape of "7", the clamping hook (23) is located at the upper part of the "7", the clamping hook (23) is provided with a hook groove, when the latch bolt (3) is retracted, through cooperation of the movement of the clamping plate (21) and the movement of the latch bolt plate (4), the clamping pin (24) slides into the clamping notch (30) from the lower part of the "7" relative to the clamping notch (30) and rotates the clamping hook (23) to the direction of increasing the torsion of the clamping torsion spring (25) in the sliding process, until the clamping hook (23) falls into the hook groove, the hook groove limits the movement of the clamping pin (24) with the clamping plate (21) in the direction of stretching the pull spring (22), so as to fix the latch bolt plate (4).

4. An automatic lock according to claim 1 or 2, characterised in that The latch plate (6) is provided with a limiting piece, a limiting gap for preventing the pull hook end of the guide hook (31) from being raised is left between the limiting piece and the latch plate (6), the guide hook (31) always moves in the limiting gap.

5. An automatic lock according to claim 1 or 2, characterized in that The automatic lock further comprises a rotating assembly, which comprises a transmission gear (12), a driving gear (13), a yoke (14) and a yoke plate (15). The transmission gear (12) is fixedly connected with the driving gear (13) and is rotatably arranged on the lock body (2) through a rotating shaft (18). The driving gear (13) is used for connecting a lock cylinder. One end of the yoke (14) is provided with external teeth and is externally engaged with the transmission gear (12). The other end of the yoke (14) is concentrically rotatably arranged on the lock body (2) with the yoke plate (15), and rotating centers of the yoke (14) and the yoke plate (15) are provided with a square hole rotating part (17) for connecting a handle. The yoke (14), the yoke plate (15) and the square hole rotating part (17) are connected through a clutch structure. The lock body (2) is provided with a yoke (14) engaging position and a yoke (14) disengaging position. When the yoke (14) is located at the engaging position, the latch bolt (3) is in a locking state. The handle is rotatably unlocked through the square hole rotating part (17) to drive the yoke plate (15) and the yoke (14) to synchronously rotate. When the yoke (14) is located at the disengaging position, the latch bolt (3) is in an unlocking state. The handle is rotatably unlocked through the square hole rotating part (17) to drive the yoke plate (15) to rotate alone. The yoke plate (15) is provided with a yoke pin (20). The yoke pin (20) is arranged on the latch plate (6) and can rotate with the yoke plate (15) to drive the latch plate (6) to move and make the latch bolt (5) retract. When the latch bolt (5) is ejected under the action of the second thrust assembly, the latch plate (6) can reversely drive the yoke pin (20) to make the yoke plate (15) reset.

6. An automatic lock according to claim 5, wherein The clutch structure comprises a clutch part (16). The clutch part (16), the square hole rotating part (17), the yoke (14) and the yoke plate (15) are concentrically arranged. The yoke (14) is fixed on the clutch part (16). The clutch part (16), the yoke (14) and the yoke plate (15) all have circular and same-sized inner holes. The clutch part (16), the yoke (14) and the yoke plate (15) are all provided with two symmetrically arranged inner convex limit points (40) on the inner holes. The limit points (40) on the clutch part (16) and the yoke (14) are coincident in projection along the center line of the inner hole. The square hole rotating part (17) is located in the inner holes. The two limit points (40) in the same inner hole are arranged on two sides of the square hole rotating part. The square hole rotating part (17) can rotate in the range between the two limit points (40) or push the limit points (40) to synchronously rotate by being arranged on the limit points (40). When the clutch part (16) is located at the engaging position, the two limit points (40) on the clutch part (16) and the two limit points (40) on the yoke plate (15) are coincident in projection along the center line of the inner hole. When the clutch part (16) is located at the disengaging position, the two limit points (40) on the clutch part (16) and the two limit points (40) on the yoke plate (15) are symmetrically arranged in projection along the center line of the inner hole.

7. An automatic lock according to claim 5, wherein The yoke pin (20) and the rotating assembly are arranged on two sides of the guide hook (31).

8. An automatic lock according to claim 5, wherein The first thrust assembly comprises a first guide rod (8) and a first spring (9), one end of the first guide rod (8) is fixed on the lock body (2), the other end is arranged on the lock tongue plate (4), the extension direction of the first guide rod (8) is consistent with the movement direction of the lock tongue (3), the first spring (9) is sleeved on the first guide rod (8) and is compressed and abuts against between the lock tongue plate (4) and the lock body (2), the first thrust assembly is provided with two groups, the driving tooth (13) is located between the two groups of first thrust assemblies, the balance torsion spring (33) is arranged on the rotating shaft (18), the lock body (2) is provided with a positioning pin, one end of the balance torsion spring (33) is connected to the positioning pin, the other end is connected to the driving tooth (13), the acting force of the balance torsion spring (33) makes the driving tooth (13) have a tendency to rotate in the direction of driving the lock tongue (3) to extend, the acting force gradually increases during the extension of the lock tongue (3).

9. An automatic lock according to claim 2 or 3, characterised in that, The lock body (2) is further provided with a safety mechanism, the safety mechanism comprises a safety block (36) and a safety spring (37), the safety block (36) is rotationally arranged on the lock body (2), the clamping plate (21) is provided with a clamping point (39), the safety block (36) is provided with a knob (38), the knob (38) can abut against the clamping point (39), the two ends of the safety torsion spring are connected to the safety block (36) and the lock body (2) respectively, the torsion of the safety torsion spring makes the knob (38) abut tightly against the clamping point (39), so as to fix the clamping plate (21).

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