CN211342218U - Automatic locking anti-theft door lock - Google Patents

Abstract

The utility model discloses an automatic bump and close burglary-resisting door lock, it has solved current oblique tongue touching formula and has closed the burglary-resisting door lock and easily lead to the problem that the burglary-resisting door lock used the trouble because of the mistake touching. The technical scheme is as follows: the automatic touch-closing anti-theft door lock includes one lock body with one lock bolt capable of extending to the outside of the lock panel and inserted into the door frame hole to lock the door, and one support board connected to the lock bolt.

Description

Automatic locking anti-theft door lock

Technical Field

The utility model relates to a security door lock especially relates to an accessible touching pressurized and realizes automatically that the set bar stretches out the lock panel outside and carries out the security door lock that locks to the burglary-resisting door.

Background

The anti-theft door lock is arranged on the anti-theft door and used for locking the anti-theft door when the door is closed. Conventional security door locks have a bolt and a latch bolt assembly that are inserted into a door frame opening to lock the security door to the door frame. If the outside door handle is fixed to the security door, the security door cannot be opened by the handle on the outside of the door. In the actual use process, a resident with relatively poor safety awareness sometimes goes out with a handle door, and the locking of the anti-theft door is realized only by utilizing the latch bolt assembly. Under most existing conditions, a latch bolt block in a latch bolt assembly in the anti-theft door lock is relatively smooth to enter and exit from a lock body, and in order to facilitate door closing, an inclined plane on the latch bolt block faces the outer side of a door. Therefore, in the case of using only the latch bolt block to lock the security door, the elastic sheet can be used to insert between the door and the door frame at the position of the latch bolt block on the outside, and the latch bolt block can be easily pushed into the lock body to open the door, so that the security of locking the security door is relatively poor.

The Chinese invention patent (publication number: 106088843B) provides a latch bolt block touch device of an automatic lock, and belongs to the technical field of hardware door lock accessories. It has solved the current automatic lock inconvenient scheduling problem of locking. The invention comprises an oblique tongue piece rod, an oblique tongue piece, a shifting piece, a limiting block, a leaning mechanism and an oblique tongue piece resetting mechanism, wherein the limiting block is rotationally connected with a lock box through a fixed shaft, the limiting block swings around the fixed shaft to enable a limiting part on the limiting block to be switched between a locking position and an unlocking position, the shifting piece is positioned on the side part of the oblique tongue piece rod, the inner end of the shifting piece is rotationally connected with the limiting block, the outer end of the shifting piece faces the oblique tongue piece, a hook pull opening is formed in the shifting piece, a clamping hook corresponding to the hook pull opening is arranged on one side, facing the shifting piece, of the oblique tongue piece rod, when the oblique tongue piece retracts, the clamping hook can fall into the hook pull opening along with the motion of the oblique tongue piece rod to form hook buckle connection, and the outer end of the shifting. After the oblique bolt block is locked, the bolt plate can be automatically ejected out to complete the locking of the main bolt, so that the trouble that the bolt can be locked by a key is avoided.

Although the main bolt can be rapidly extended out of the lock body through the contact of the oblique bolt block in the anti-theft door lock, the oblique bolt block often protrudes out of the lock panel, the activity of the oblique bolt block is relatively sensitive, the situation that the oblique bolt block is touched by mistake sometimes can occur, and the main bolt is ejected when not needed, so that the trouble in the use of the anti-theft door lock is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who needs the solution: the utility model provides an automatic bump-lock pickproof door lock, this pickproof door lock only need just can stretch out the lock panel outside and insert the door frame hole to the regular set bar of pickproof door lock, on the basis of guaranteeing the security of pickproof door, can effectively improve the convenient to use nature of pickproof door lock.

For solving the technical problem, the technical scheme of the utility model: the automatic touch-closing anti-theft door lock includes one lock body with one lock bolt capable of extending to the outside of the lock panel and inserted into the door frame hole to lock the door, and one support board connected to the lock bolt.

After the anti-theft door lock is assembled on the anti-theft door, the trigger piece extends out of the outer side of the lock panel when the door is not locked at ordinary times. When the anti-theft door is closed, the trigger piece is pushed into the lock body by the door frame, so that the position, corresponding to the trigger piece, on the door frame is required to be a solid surface, namely, the trigger piece can be pressed into the lock body, and the driving mechanism is triggered to enable the lock bolt to extend out of the lock panel, so that the lock bolt participates in locking the anti-theft door.

When the anti-theft door is locked, the lock bolt is a general name of a locking structure different from the inclined tongue piece and plays a main locking role for the anti-theft door.

Furthermore, the driving mechanism comprises a driving plate, two ends of a spring respectively act on the driving plate and the lock body, and the spring provides power for the driving plate to force the lock bolt to extend out of the lock panel; the middle position of the lock tongue rotating plate is pivoted in the lock body, one end of the lock tongue rotating plate is in transmission connection with the supporting plate, and the other end of the lock tongue rotating plate is in transmission connection with the driving plate; be equipped with the joint structure on the drive plate, joint spare cooperatees and prescribes a limit to the drive plate motion with the joint structure, and the trigger piece makes joint spare and joint structure throw off mutually through entering into the lock body. Through the structural style that sets up the drive plate to the joint structure that forms, through the transition of joint spare, and realize triggering the piece and realize that the set bar stretches out the lock panel outside through actuating mechanism, simple structure sets up rationally, makes triggering the piece can stably trigger actuating mechanism, and the actuating mechanism of being convenient for is to the effect of set bar.

Furthermore, a damper is arranged in the lock body and connected to the driving plate. The damper is arranged, so that the movement speed of the driving plate under the action of the spring can be reduced, the noise generated by the driving plate can be effectively reduced, the mute property of the anti-theft door lock during working is good, the impact on each part in the driving mechanism in the working process can be reduced, and the service life is prolonged.

Further, the joint structure includes the cardboard of superpose pin joint on the drive plate, is formed with the dop on the cardboard, and the dop elastically stretches out the outside of drive plate to be formed with the bayonet socket that is used for joint spare in dop position department. The outside that the dop stretches out the drive plate is provided by the elasticity of spring usually, through setting up the cardboard, and makes when drive plate reverse motion the dop that joint spare can bulldoze the cardboard and make the dop give way the position, the drive plate of being convenient for resets to it is spacing to carry out the drive plate once more through the dop for joint spare.

Furthermore, the joint spare include the base plate of pin joint in the lock, be equipped with the moving part that links with the trigger piece in the outside of base plate outer end, the moving part is used for making the interior tip of base plate and joint structure cooperate or throw off. The movable piece acts on the outer end of the base plate, so that the structure is simple, and the matching relation between the base plate and the clamping structure is convenient to change.

Furthermore, the movable piece is movably superposed on the connecting plate, a notch for inserting the outer end of the base plate is arranged at the side edge of the connecting plate, the notch corresponds to the outer end of the base plate, and the movable piece is used for being superposed at the position of the notch or being separated from the notch. Through setting up the connecting plate to set up on the connecting plate the notch, the change of the base plate position of being convenient for, the moving part can guarantee to the stability of action of base plate.

Furthermore, a clutch plate is stacked on the base plate, a sliding groove and a sliding pin which are matched with each other are arranged between the clutch plate and the base plate, a stress structure is arranged on the clutch plate, and the support plate drives the clutch plate to move towards the direction of the lock panel through the stress structure; the clutch plate extends into the motion range of the oblique tongue block in the lock body, the oblique tongue block is provided with a blocking structure, and the blocking structure limits the rotating plate to move towards the direction of the connecting plate through the clutch plate. After the lock bolt completely extends out of the lock panel to a proper position, the clutch plate is driven by the supporting plate to the outer side and can act with the blocking structure to limit the substrate to move towards the direction of disengaging from the clamping structure. When utilizing the key to open security door lock, because the joint of base plate is spacing, when the key rotated the second circle, the dop on base plate and the cardboard stabilizes the joint, and the drive plate is in stable condition, and the drive plate can not exert the effort to the layer board under the effect of spring for the key is opened security door lock light, can adapt to the action of opening to security door lock well, provides good unblanking experience for the user. The clutch plate extends into the motion range of the latch bolt block, and can reset on the substrate under the pushing of the latch bolt block after the anti-theft door lock is completely unlocked, so that the substrate can meet the secondary locking requirement of the anti-theft door lock.

Furthermore, an inclined tongue block is arranged in the lock body, the trigger piece is arranged on the back of the inclined tongue block, and the trigger piece protrudes out of the outer side of the back of the inclined tongue block. The back of the latch bolt block is provided with a guide groove, and the trigger piece is arranged in the guide groove in a sliding manner. The trigger piece is arranged on the back surface of the oblique tongue piece and is reasonable in arrangement, and due to the fact that the oblique tongue piece blocks, the trigger piece is not prone to being touched by mistake, and the use stability of the anti-theft door lock is improved.

Furthermore, the latch bolt block is connected to the connecting plate, the moving piece is superposed on the back surface of the connecting plate, the connecting plate is provided with an elastic piece acting on the moving piece, and the elastic piece promotes the trigger piece to extend out of the locking panel through the moving piece. The latch bolt block is directly arranged on the connecting plate, the structure is simple, and the driving mechanism can be arranged by fully utilizing the existing structure.

Furthermore, a shifting sleeve assembly is arranged in the lock body and comprises a shifting column connected with the handle, a driving shifting piece is fixedly sleeved on the shifting column in the circumferential direction, the outer end of the driving shifting piece is used for being in transmission connection with a driving mechanism, and the handle enables the lock bolt to retract into the inner side of the lock panel through the driving mechanism. Through setting up drive plectrum and actuating mechanism transmission hookup, simple structure, the handle of being convenient for utilize realizes the handle with the help of actuating mechanism that the handle is opened the burglary-resisting door lock fast, has made things convenient for from inboard opening the burglary-resisting door.

Compared with the prior art, the utility model discloses the beneficial effect who has: the anti-theft door lock is provided with the trigger piece, the trigger piece is arranged at the position of the lock panel, the door frame is used for jacking the trigger piece, and the trigger driving mechanism enables the lock bolt to extend out of the outer side of the lock panel, so that the lock bolt is involved in locking the anti-theft door. The anti-theft door lock is well suitable for the actual use condition of the anti-theft door lock, and the lock bolt can participate in the locking of the anti-theft door when the anti-theft door needs to be locked. Compared with the existing mode of starting the lock bolt by touching the oblique tongue piece, the anti-theft door lock is not easy to be mistakenly touched to start when in use, and the use of the anti-theft door lock is facilitated. When the anti-theft door is locked, the lock bolt can participate in the locking of the anti-theft door, so that the use safety of the anti-theft door lock is high.

Drawings

Fig. 1 is an internal structural view of the automatic latching security door lock.

Fig. 2 is a structural view of the drive plate.

Fig. 3 is a structural view of a latch bolt rotary plate.

Fig. 4 is a diagram of a latch paddle.

Fig. 5 is a diagram showing a lock plate structure.

FIG. 6 is a block diagram of the trigger member coupled to the moveable member.

Fig. 7 is a top view of fig. 6.

FIG. 8 is a block diagram of the latch assembly.

Fig. 9 is a bottom view of fig. 8.

Fig. 10 is a structural view of the substrate.

In the figure: 1. a lock body; 2. a drive plate; 3. the lock tongue rotates the board; 4. a lock plate; 5. driving the shifting piece; 6. a substrate; 7. a tension spring; 8. clamping a plate; 9. a lock panel; 10 a connecting plate; 11. an oblique tongue block; 12. column shifting; 13. a support plate; 14. a lock bolt; 15. a latch-tongue poking piece; 16. a trigger; 17. and a movable member.

Detailed Description

With the attached drawings of the specification, the automatic latching anti-theft door lock structurally comprises a lock body 1, wherein the lock body 1 is box-shaped, a lock bolt 14, a lock cylinder, a shifting sleeve assembly and a latch bolt assembly are movably arranged in the lock body 1, and the lock bolt 14 is connected to a supporting plate 13. After the anti-theft door lock is installed in place, the lock panel 9 on the lock body 1 faces outwards, and the lock bolt 14 is located at the position of the lock panel 9. The key is inserted into the lock core, the lock bolt 14 and the latch bolt block 11 are unlocked by the shifting block on the lock core, the shifting sleeve assembly is connected with the handle, and the lock bolt 14 and the latch bolt block 11 can be retracted into the lock body 1 indoors by the handle, so that the opening of the security door is realized.

A lock cylinder hole is formed in the lock body 1 and located on the outer side of the supporting plate 13, a lock cylinder is installed in the lock cylinder hole, a key is inserted into the lock cylinder, the shifting blocks on the lock cylinder are used for shifting the shifting teeth on the supporting plate 13, and the anti-theft door lock can be opened or closed through the key. Generally, two-gear opening and two-gear locking modes are adopted to operate the anti-theft door lock through a key, two spaced shifting teeth are arranged to enable a shifting head to be abutted against the anti-theft door lock, and the key needs to rotate for two circles.

The shifting sleeve component comprises a shifting column 12, the shifting column 12 is rotatably arranged in the lock body 1, and an inclined tongue shifting piece 15 is sleeved on the shifting column 12. The handle is connected in the shifting column 12 in an inserting way, the handle at the inner side of the anti-theft door is rotated, and the inclined tongue piece 11 is pushed into the lock body 1 through the inclined tongue shifting piece 15, so that the inclined tongue piece 11 is opened. The supporting plate 13 is movably provided with a push piece, the push piece forms transmission between a shifting block of the lock cylinder and the latch bolt shifting piece 15, after the lock bolt 14 is completely retracted into the lock body 1, the push piece is positioned between the shifting block and the latch bolt shifting piece 15, the key is continuously rotated, the shifting block pushes the push piece, the push piece presses an extending part at the left upper corner of the latch bolt shifting piece 15 in the picture 4, and the extending part at the right upper corner of the latch bolt shifting piece 15 shifts the latch bolt assembly to enable the latch bolt block 11 to be retracted into the lock body 1, so that the complete opening of the anti-theft door lock is realized. The structure of the oblique tongue component comprises an oblique tongue block 11, the front surface of the oblique tongue block 11 is provided with an inclined surface, the oblique tongue block 11 is connected on a connecting plate 10, and the oblique tongue shifting piece 15 is in transmission connection with the connecting plate 10.

The security door is rotatably arranged in the door frame, and a door frame hole is arranged on the door frame at the position corresponding to the lock bolt 14 and the latch bolt block 11, so that the lock bolt 14 and the latch bolt block 11 can be inserted to realize the locking of the security door.

In order to realize that the lock bolt 14 can automatically extend to the outside of the lock panel 9 when the security door is locked, the door frame presses the trigger piece 16 into the lock body 1 by arranging the trigger piece 16, and the trigger lock bolt 14 extends to the outside of the lock body 1. The trigger 16 is movably arranged at the position of the lock panel 9, and when the security door is at the opening position, the trigger 16 protrudes to the outer side of the lock panel 9. The driving mechanism which is in transmission connection with the supporting plate 13 is arranged in the lock body 1, after the trigger piece 16 is pushed into the lock body 1 by a door frame, the trigger piece 16 acts, and the driving mechanism is triggered to enable the lock bolt 14 to extend out of the lock panel 9 and be inserted into a door frame hole.

The driving mechanism may be a motor which is activated to act on the support plate 13 via a transmission mechanism after the trigger 16 is pressed into the lock body 1, so that the locking bolt 14 protrudes outside the lock body 1.

The driving mechanism may also comprise a driving plate 2, both ends of the spring respectively act on the driving plate 2 and the lock body 1, the spring shown in fig. 1 is a tension spring 7, and when the bolt 14 is extended to the outside of the lock body 1, the power of the driving plate 2 is provided by the tension spring 7. In order to reduce the impact force generated when the driving plate 2 is started, a damper is arranged in the lock body 1 and is connected to the driving plate 2, and when the driving plate 2 moves, the damper applies damping force to the driving plate 2 so as to reduce the response speed of the driving plate 2 after being triggered.

A bolt rotating plate 3 is arranged between the driving plate 2 and the supporting plate 13, the bolt rotating plate 3 is curved, and the middle position of the bolt rotating plate 3 is pivoted in the lock body 1. One end of the bolt rotating plate 3 is in transmission connection with the supporting plate 13, and the other end of the bolt rotating plate is in transmission connection with the driving plate 2. Be equipped with the joint structure on the drive plate 2, joint spare joint is structural to the joint after, even there is the pulling force of extension spring 7, drive plate 2 still is in quiescent condition. After the trigger piece 16 is pressed into the lock body 1 by the door frame, the trigger piece 16 enables the clamping piece to be separated from the clamping structure, the constraint of the clamping piece on the drive plate 2 is released, and the drive plate 2 moves under the action of the tension spring 7. The above-mentioned column 12 is also fixedly connected with the driving plate 5 in the circumferential direction, the outer end of the driving plate 5 is connected with the driving plate 2 in a transmission way, when the door handle is rotated indoors, the driving plate 2 is driven to move reversely by the driving plate 5, so that the tension spring 7 is opened, and the lock bolt 14 is retracted into the inner side of the lock panel 9.

In order to facilitate the reverse reset of the driving plate 2, the clamping structure is movably arranged. The clamping structure comprises clamping plates 8 which are superposed and pivoted on the driving plate 2, clamping heads are formed on the clamping plates 8, and the outer side faces of the clamping heads are inclined planes. Can cup joint the torsional spring in cardboard 8 pivot position department, also can be through the mode that sets up the spring and make the dop can stretch out the outside of drive plate 2 elastically to be formed with the bayonet socket that is used for joint spare in the dop and the lateral margin position of drive plate 2.

The clamping piece comprises a base plate 6 pivoted in the lock body 1, and the base plate 6 is in a straight plate shape and can also be in a rod shape. A torsion spring may be sleeved on the base plate 6 at the pivot position, or a spring may be arranged in the lock body 1 to maintain the outer end of the base plate 6 in a moving trend in a direction away from the latch bolt assembly. The outer side of the outer end of the base plate 6 is provided with a movable piece 17 connected with the trigger piece 16, and the movable piece 17 is used for enabling the inner end of the base plate 6 to be clamped or separated with the clamping structure.

The trigger piece 16 is arranged at the back of the latch bolt block 11, the trigger piece 16 is a strip-shaped body, and the trigger piece 16 protrudes to the outer side of the back of the latch bolt block 11. The movable piece 17 is a sheet-shaped body and is in a T shape, the movable piece 17 is movably overlapped on the back surface of the connecting plate 10, and the trigger piece 16 is connected and fixed with the movable piece 17. The side edge of the connecting plate 10 is provided with a notch for inserting the outer end of the base plate 6, the notch corresponds to the position of the outer end of the base plate 6, and the movable piece 17 is used for being overlapped to the position of the notch or being separated from the notch. A spring is provided on the connecting plate 10, which spring acts on the movable element 17, and the triggering element 16 projects through the movable element 17 to the outside of the lock panel 9.

The base plate 6 is also superposed with a clutch plate, the base plate 6 is provided with two parallel chutes, the clutch plate is provided with two loose pins, and the two loose pins are respectively inserted into the two chutes in a clearance way and used for providing a guide function for the movement of the clutch plate on the base plate 6. The outer end of the clutch plate constitutes the stressed structure by bending upwards to form a hem, which is located outside the pallet 13 inside the lock body 1. During the complete extension of the locking bolt 14 outside the lock faceplate 9, the support plate 13 carries the clutch plate by folding the edge in the direction of the lock faceplate 9. The latch tongue piece 11 is provided with a blocking structure which can be the latch tongue piece 11 itself, the connecting plate 10 or a small convex body, and the blocking structure limits the base plate 6 to move towards the connecting plate 10 through the clutch plate. The clutch plate extends into the motion range of the latch bolt block 11 in the lock body 1, and after the latch bolt block 11 retracts into the lock body 1, the latch bolt block 11 can push the clutch plate to move towards the direction of the drive plate 2.

When the anti-theft door is closed, the latch bolt block 11 enters the door frame hole after being pushed by the door frame, the clutch plate is pushed to move towards the driving plate 2 by the latch bolt block 11 in the pushing process, and the clutch plate is separated from the blocking structure on the latch bolt assembly. The trigger piece 16 is pressed by the door frame and enters the lock body 1, the movable piece 17 is separated from the notch on the connecting plate 10, the outer end of the base plate 6 enters the notch, and the inner end of the base plate 6 is separated from the bayonet to release the constraint of the driving plate 2. Under the tension of the tension spring 7, the driving plate 2 moves to the right in the lock body 1 in fig. 1. When the driving plate 2 moves, see fig. 5, the shifting pin on the driving plate 2 can slide in the sliding opening at the right lower corner of the locking plate 4, so that the clamping end at the left upper corner of the locking plate 4 can be separated from the supporting plate 13, the driving plate 2 pushes the supporting plate 13 towards the outside through the bolt rotating plate 3, and then the bolt 14 is extended out of the locking panel 9.

The anti-theft door can be opened in two ways, one is opened indoors by using a handle, and the other is opened by using a key.

When the lock is opened by the handle, the handle is rotated to drive the driving shifting piece 5 to deflect, so that the driving plate 2 moves towards the left direction in the figure 1, the driving plate 2 pulls the supporting plate 13 through the bolt rotating plate 3 to move, and the lock bolt 14 retracts into the lock body 1. After the driving plate 2 rotates to the right position, a bayonet formed at the position of the driving plate 2 is clamped with the inner end of the substrate 6. A locking structure in the form of helical teeth may be provided on the support plate 13 at the shackle end of the locking plate 4, and the locking structure slides with the shackle end of the locking plate 4 during retraction of the lock bolt 14 into the lock body 1. Corresponding toggle structures can be arranged on the toggle assembly, see fig. 5, the toggle structures toggle the position of the upper right corner of the lock plate 4, and the clamping end of the upper left corner of the lock plate 4 can be separated from the locking structure on the supporting plate 13, so that the supporting plate 13 can smoothly move towards the direction of the driving plate 2. After the lock bolt 14 retracts into the lock body 1, the handle continues to rotate, and the latch bolt block 11 retracts into the lock body 1 through the latch bolt shifting piece 15, so that complete door opening is realized. During the process that the oblique tongue block 1 retracts into the lock body 1, the oblique tongue block 11 can push the clutch plate to reset. When the anti-theft door is opened, the trigger piece 16 extends to the outer side of the lock panel 9, and the movable piece 17 is overlapped at the notch on the connecting plate 10.

When the anti-theft door lock is unlocked by using the key, the working mode of the anti-theft door lock is the same as the unlocking mode of the existing common anti-theft door lock. It should be noted that the security door lock is vertically installed on the security door, that is, it is rotated 90 degrees counterclockwise in fig. 1. When the bolt 14 is fully extended outside the lock face plate 9, it will drive the clutch plate to extend outward, and the clutch plate will block the blocking structure on the latch bolt assembly, so as to restrict the movement of the drive plate 2. When the lock is opened by using a key, the shifting block on the lock core pushes the supporting plate 13 to move towards the direction of the driving plate 2, so that the lock bolt 14 is completely retracted into the lock body 1, and finally the latch bolt shifting piece 15 is pushed by the pushing piece to enable the latch bolt block 11 to be retracted into the lock body 1. The movement of the cam tongue 11 will in turn reset the clutch plate on the base plate 6. During the process that the supporting plate 13 drives the lock bolt 14 to retract, the supporting plate 13 can drive the driving plate 2 to move towards the left side shown in fig. 1 by overcoming the pulling force of the tension spring 7 through the bolt rotating plate 3, and the bayonet on the driving plate 2 can be clamped on the inner end of the base plate 6. Due to the existence of the clutch plate, before the latch bolt block 11 is driven, the base plate 6 is in a relatively stable state due to the function of the clutch plate and the blocking structure, so that the bayonet is conveniently clamped on the inner end part of the base plate 6.

Claims (10)

1. The automatic touch-closing anti-theft door lock includes one lock body with one lock bolt capable of extending to the outside of the lock panel and inserted into the door frame hole to lock the door, and one support board connected to the lock bolt.

2. The automatic latching security door lock of claim 1 wherein the actuator includes a driver plate, the ends of the spring acting on the driver plate and the lock body, respectively, the spring providing power to the driver plate to urge the latch bolt to extend outside the lock panel; the middle position of the lock tongue rotating plate is pivoted in the lock body, one end of the lock tongue rotating plate is in transmission connection with the supporting plate, and the other end of the lock tongue rotating plate is in transmission connection with the driving plate; be equipped with the joint structure on the drive plate, joint spare cooperatees and prescribes a limit to the drive plate motion with the joint structure, and the trigger piece makes joint spare and joint structure throw off mutually through entering into the lock body.

3. The automatic latching security door lock of claim 2 wherein a damper is disposed within the lock body, the damper being coupled to the drive plate.

4. The automatic latching burglar-proof door lock as claimed in claim 2, wherein the latch structure comprises a latch plate pivotally mounted on the driving plate in a stacked manner, the latch plate being formed with a catch, the catch being elastically protruded to an outside of the driving plate, so that a catch for latching the latch member is formed at a position of the catch.

5. The automatic latching anti-theft door lock according to claim 2, wherein the latch member comprises a base plate pivotally connected in the lock body, a movable member coupled to the trigger member is provided at an outer side of an outer end of the base plate, and the movable member is used to engage or disengage an inner end portion of the base plate with or from the latch structure.

6. The automatic latching anti-theft door lock according to claim 5, wherein the movable member is movably stacked on the connecting plate, a recess for inserting the outer end of the base plate is provided at a side edge of the connecting plate, the recess corresponds to the outer end of the base plate, and the movable member is adapted to be overlapped with or separated from the recess.

7. The automatic latching anti-theft door lock according to claim 6, wherein a clutch plate is stacked on the base plate, a sliding groove and a sliding pin are arranged between the clutch plate and the base plate, the clutch plate is provided with a stress structure, and the support plate urges the clutch plate to move towards the direction of the lock panel through the stress structure; the clutch plate extends into the motion range of the oblique tongue block in the lock body, the oblique tongue block is provided with a blocking structure, and the blocking structure limits the rotating plate to move towards the direction of the connecting plate through the clutch plate.

8. The automatic latching anti-theft door lock according to claim 6, wherein the lock body has a latch bolt block therein, the trigger member is provided at a back surface of the latch bolt block, and the trigger member protrudes to an outer side of the back surface of the latch bolt block.

9. The automatic latching anti-theft door lock according to claim 8, wherein the latch piece is coupled to a coupling plate, the movable member is superposed on a rear surface of the coupling plate, and an elastic member acting on the movable member is provided on the coupling plate, the elastic member urging the trigger member to extend to an outside of the lock panel through the movable member.

10. The automatic latching anti-theft door lock according to any one of claims 1 to 9, wherein a toggle assembly is provided in the lock body, the toggle assembly includes a toggle post for coupling with the handle, a driving toggle piece is fixedly sleeved on the toggle post in a circumferential direction, an outer end of the driving toggle piece is for driving coupling with the driving mechanism, and the lock bolt is retracted into the lock panel by the driving mechanism through the handle.

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