CN110630115A - Automatic knock-close anti-theft door lock - Google Patents

Abstract

The invention discloses an automatic touch-closing anti-theft door lock, which solves the problem that the existing oblique tongue touch-closing anti-theft door lock is easy to be touched by mistake, which leads to troublesome use of the anti-theft door lock. The technical solution adopted: an automatic touch-closing anti-theft door lock, comprising a lock body, a lock bolt that can extend to the outside of the lock panel is arranged in the lock body, and the lock bolt is used to be inserted into a door frame hole to lock the door, The lock bolt is connected to the pallet, and is characterized in that the trigger is movably arranged at the position of the lock panel, and a drive mechanism that is drive-connected to the pallet is arranged in the lock body. After the trigger is pushed into the lock body by the door frame, the trigger It works, and the trigger drive mechanism urges the lock bolt to protrude out of the lock panel and to be inserted into the door frame hole, and the trigger piece is stabilized in the lock body.

Description

Automatic knock-close anti-theft door lock

technical field

The invention relates to an anti-theft door lock, in particular to an anti-theft door lock which can automatically realize that the lock bolt extends to the outside of the lock panel to lock the anti-theft door by being touched and pressed.

Background technique

The anti-theft door lock is installed on the anti-theft door and is used to lock the anti-theft door when the door is closed. A common anti-theft door lock has a lock bolt and an oblique bolt assembly, and both the lock bolt and the oblique bolt assembly can be inserted into the door frame hole to lock the anti-theft door on the door frame. When the outer door handle on the security door is fixed, the security door cannot be opened by the handle on the outer side of the door. In the actual use process, households with relatively poor security awareness sometimes tend to take the door around when they go out, and only use the oblique tongue assembly to lock the security door. In most existing situations, the oblique tongue block in the oblique tongue assembly in the anti-theft door lock is relatively smooth to enter and exit the lock body, and to facilitate closing the door, the inclined surface on the oblique tongue block faces the outside of the door. Therefore, in the case where the anti-theft door is locked only by the oblique tongue block, the elastic sheet can be used on the outside to be inserted between the door and the door frame at the position of the oblique tongue block, and the oblique tongue block can be easily pushed into the lock body. , the door is opened, and the security of the anti-theft door is relatively poor.

The Chinese invention patent (publication number: 106088843B) provides an automatic locking oblique tongue block touching device, which belongs to the technical field of hardware door lock accessories. It solves the problems such as the inconvenience of the existing automatic lock and the like. The present invention includes the oblique tongue block rod, the oblique tongue block, the pick piece, the limit block, the abutment mechanism and the oblique tongue block reset mechanism. The upper limit part switches between the locking position and the unlocking position, the paddle is located on the side of the oblique tongue block rod, the inner end of the paddle is rotatably connected with the limit block, the outer end faces the direction of the oblique tongue block, and the paddle is opened. There is a hook pull opening, and the side of the oblique tongue block rod facing the paddle is provided with a hook corresponding to the hook pull opening. When the oblique tongue block retracts, the hook can fall into the hook pull opening with the movement of the oblique tongue block rod to form a hook connection. The outer end of the paddle is provided with an inclined surface that can be pushed away from the bar of the oblique tongue block by the fork of the oblique tongue block. After the oblique bolt block of the present invention is locked, the deadbolt plate can be automatically ejected to complete the locking of the main deadbolt, thereby eliminating the trouble of using a key to lock.

In this anti-theft door lock, although the main lock tongue can be quickly extended to the outside of the lock body by touching the oblique tongue block, because the oblique tongue block often protrudes to the outside of the lock panel, and the movement of the oblique tongue block is relatively small. It is sensitive, and sometimes the oblique tongue block is accidentally touched, which causes the main lock tongue to pop up when it is not needed, thus causing trouble in the use of the anti-theft door lock.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an automatic knock-off anti-theft door lock. The anti-theft door lock can only be extended to the outside of the lock panel and inserted into the door frame hole when the anti-theft door needs to be locked. On the basis of safety, it can effectively improve the convenience of use of the anti-theft door lock.

In order to solve the technical problem, the technical solution of the present invention is: an automatic knock-off anti-theft door lock, comprising a lock body, a lock bolt that can be extended to the outside of the lock panel is arranged in the lock body, and the lock bolt is used to be inserted into the door frame hole Locking the door is realized in the middle of the lock, and the lock bolt is connected to the support plate. After entering the lock body, the trigger element works, and the trigger drive mechanism urges the lock bolt to protrude to the outside of the lock panel and to be inserted into the door frame hole, and the trigger element is stabilized in the lock body.

After the anti-theft door lock is assembled on the anti-theft door, when the door is not locked normally, the triggering piece protrudes to the outside of the lock panel. When closing the anti-theft door, the trigger is pushed into the lock body by the door frame, which requires a solid surface at the position corresponding to the trigger on the door frame, that is, the trigger can be pressed into the lock body, and the drive mechanism can be triggered. The lock bolt is extended to the outside of the lock panel, so that the lock bolt participates in the locking of the anti-theft door.

When realizing the lock of the anti-theft door, the lock bolt refers to the general term of the locking structure different from the oblique tongue block, and plays the main role of locking the anti-theft door.

Further, the drive mechanism includes a drive plate, two ends of the spring act on the drive plate and the lock body respectively, and the spring provides power for the drive plate to push the lock bolt to extend to the outside of the lock plate; In the body, one end of the lock tongue turning plate is drive-connected with the support plate, and the other end is drive-connected with the drive plate; the drive plate is provided with a clamping structure, and the clamping piece cooperates with the clamping structure to limit the movement of the driving board, and the triggering piece passes through the into the lock body to promote the disengagement of the clamping piece from the clamping structure. By setting the structural form of the driving board and forming the clamping structure, through the transition of the clamping piece, the triggering piece can realize the lock bolt extending to the outside of the locking board through the driving mechanism. The structure is simple and the setting is reasonable, so that the triggering piece can The driving mechanism performs stable triggering, which is convenient for the driving mechanism to act on the lock bolt.

Further, a damper is provided in the lock body, and the damper is connected to the drive plate. The damper can reduce the movement speed of the drive plate under the action of the spring, which can effectively reduce the noise generated thereby, so that the anti-theft door lock is quiet when working, and it can also reduce the speed of each component in the drive mechanism during the working process. The impact received, improve the service life.

Further, the clamping structure includes a clamping plate which is stacked and pivoted on the driving board, a clamping head is formed on the clamping board, and the clamping head elastically protrudes to the outside of the driving board, so that a clamping head for clamping is formed at the position of the clamping head. The bayonet of the clip. The extension of the card head to the outside of the drive plate is usually provided by the elastic force of the spring. By setting the card plate, when the drive plate moves in the reverse direction, the card connector can push the card head of the card plate to make the card head clear. The position is convenient for the reset of the driving board, so that the clamping piece can limit the driving board again through the clamping head.

Further, the clipping member includes a base plate pivotally connected to the lock body, and a movable member connected to the trigger member is arranged on the outer side of the outer end of the base plate, and the movable member is used to make the inner end of the base plate cooperate with the clipping structure. or disengage. Through the action of the movable piece and the outer end of the base plate, the structure is simple, and it is convenient to change the matching relationship between the base plate and the clamping structure.

Further, the movable piece is movably stacked on the connecting plate, the side edge of the connecting plate is provided with a notch for inserting the outer end of the base plate, and the notch corresponds to the position of the outer end of the base plate, and the movable piece is used for inserting the outer end of the base plate. At the position coincident with the notch, or disengaged from the notch. By arranging the connecting plate and arranging the notch on the connecting plate, it is convenient to change the position of the base plate, and the stability of the action of the movable piece on the base plate can be ensured.

Further, a clutch plate is superimposed on the base plate, a matching chute and a sliding pin are arranged between the clutch plate and the base plate, a force-bearing structure is arranged on the clutch plate, and the support plate urges the clutch plate to move toward the lock through the force-bearing structure. The panel moves in the direction; the clutch plate extends into the movement range of the oblique tongue block in the lock body, the oblique tongue block is provided with a blocking structure, and the blocking structure restricts the movement of the rotating plate toward the connecting plate through the clutch plate. After the lock bolt fully extends out of the lock panel and in place, the clutch plate is driven to the outside by the support plate, and can interact with the blocking structure to limit the movement of the base plate in the direction of disengaging from the clamping structure. When the key is used to open the anti-theft door lock, due to the clamping limit of the base plate, when the key is rotated to the second turn, the base plate and the clamping head on the clamping plate are stably clamped, the driving board is in a stable state, and the driving board will not be in the spring. Under the action, a force is exerted on the support plate, so that the key is light to open the anti-theft door lock, which can well adapt to the opening action of the anti-theft door lock, and provide users with a good unlocking experience. The clutch plate extends into the movement range of the oblique tongue block. After the anti-theft door lock is fully opened, the clutch plate can be reset on the base plate under the push of the oblique tongue block, so that the base plate can meet the re-locking requirements of the anti-theft door lock. .

Further, the lock body is provided with an oblique tongue block, the trigger member is arranged at the back of the oblique tongue block, and the trigger member protrudes to the outside of the back surface of the oblique tongue block. A guide groove is arranged on the back of the oblique tongue block, and the trigger is slidably arranged in the guide groove. The triggering piece is arranged on the back of the oblique tongue block, and the setting is reasonable. Due to the blocking of the oblique tongue block, it is not easy to touch the triggering piece by mistake, which improves the use stability of the anti-theft door lock.

Further, the oblique tongue block is connected to the connecting plate, the movable piece is stacked on the back of the connecting plate, the connecting plate is provided with an elastic piece acting on the moving piece, and the elastic piece urges the triggering piece to protrude to the lock panel through the moving piece. outside. The oblique tongue block is directly set on the connecting plate, the structure is simple, and the existing structure can be fully utilized to set the driving mechanism.

Further, a dial sleeve assembly is provided in the lock body, and the dial sleeve assembly includes a dial column for connecting with the handle. The dial column is fixedly sleeved with a driving paddle on the upper circumference, and the outer end of the driving paddle is used for connecting with the driving mechanism. The drive is coupled, and the latch is retracted into the inside of the lock panel by the handle using the drive mechanism. By providing the drive paddle and the drive mechanism for transmission connection, the structure is simple, the handle can be used to quickly open the anti-theft door lock with the help of the drive mechanism, and the anti-theft door can be opened from the inside.

Compared with the prior art, the present invention has the beneficial effects: the anti-theft door lock is provided with a trigger, the trigger is set at the position of the lock panel, the door frame is used to press the trigger, and the trigger drive mechanism makes the lock The bolt protrudes to the outside of the lock panel, so that the lock bolt participates in the locking of the anti-theft door. This is well adapted to the actual use of the anti-theft door lock. When the anti-theft door needs to be locked, the lock bolt can participate in the locking of the anti-theft door. Compared with the existing method of activating the lock bolt by touching the oblique tongue block, the anti-theft door lock is less likely to be activated by accidental touch during use, which facilitates the use of the anti-theft door lock. When locking the anti-theft door, the lock bolt can participate in the locking of the anti-theft door, so that the anti-theft door lock has high safety in use.

Description of drawings

Fig. 1 is the internal structure diagram of the automatic knock-close anti-theft door lock.

FIG. 2 is a structural diagram of a drive board.

FIG. 3 is a structural diagram of a deadbolt turning plate.

Figure 4 is a structural diagram of the oblique tongue pick.

FIG. 5 is a structural diagram of a locking plate.

FIG. 6 is a structural diagram of the trigger element and the movable element being coupled together.

FIG. 7 is a plan view of FIG. 6 .

FIG. 8 is a structural diagram of the tongue assembly.

FIG. 9 is a bottom view of FIG. 8 .

FIG. 10 is a structural diagram of a substrate.

In the figure: 1. Lock body; 2. Driving plate; 3. Lock tongue turning plate; 4. Locking plate; 5. Driving paddle; 6. Base plate; 7. Tension spring; ; 10 connecting plate; 11, oblique tongue block; 12, dial column; 13, pallet; 14, lock bolt; 15, oblique tongue paddle; 16, trigger part; 17, movable part; 18, clutch plate.

Detailed ways

With reference to the drawings in the description, the structure of the automatic knock-off anti-theft door lock includes a lock body 1, the lock body 1 is box-shaped, and the lock body 1 is movably provided with a lock bolt 14, a lock cylinder, a dial sleeve assembly and a slanted tongue assembly, The latch 14 is coupled to the pallet 13 . After the anti-theft door lock is installed in place, the lock panel 9 on the lock body 1 faces the outside, and the lock bolt 14 is located at the position of the lock panel 9 . By inserting the key into the lock cylinder, the lock bolt 14 and the oblique bolt block 11 are opened by the dial on the lock cylinder, the dial sleeve assembly is connected with the handle, and the lock bolt 14 and the oblique bolt block 11 can be opened indoors by using the handle It is retracted into the lock body 1 to realize the opening of the anti-theft door.

The lock body 1 is provided with a lock cylinder hole, and the lock cylinder hole is located on the outer side of the support plate 13. The lock cylinder hole is used to install the lock cylinder. The key is inserted into the lock cylinder and the dial block on the lock cylinder is used to move the support plate. 13, and the key can be used to open or close the anti-theft door lock. Under normal circumstances, the two-speed opening and two-speed locking methods are used to operate the anti-theft door lock through the key. By setting two separate dial teeth for the dial to touch it, the key needs to be turned twice.

The dial sleeve assembly includes a dial post 12 , the dial post 12 is rotatably arranged in the lock body 1 , and an oblique tongue dial 15 is sleeved on the dial post 12 . The handle is inserted and connected in the dial 12, the handle on the inner side of the anti-theft door is rotated, and the oblique bolt 11 is pushed into the lock body 1 through the oblique tongue paddle 15 to complete the opening of the oblique bolt 11. A push piece is movably arranged on the support plate 13, and the push piece forms a transmission between the shift block of the lock cylinder and the oblique tongue shift piece 15. After the lock bolt 14 is completely retracted into the lock body 1, the push piece is located at the shift block. Continue to turn the key between it and the oblique tongue pick 15, the dial pushes the push piece, and the push piece pushes the protruding part of the upper left corner of the oblique tongue pick 15 in Fig. By moving the oblique tongue assembly, the oblique tongue block 11 is retracted into the lock body 1 to realize the complete opening of the anti-theft door lock. The structure of the oblique tongue assembly includes the oblique tongue block 11 , the front of the oblique tongue block 11 is provided with an inclined surface, the oblique tongue block 11 is connected to the connecting plate 10 , and the oblique tongue paddle 15 is drivingly connected with the connecting plate 10 .

The anti-theft door is rotatably arranged in the door frame, and a door frame hole is provided on the door frame at the position corresponding to the lock bolt 14 and the oblique tongue block 11 for the insertion of the lock bolt 14 and the oblique tongue block 11 to realize the locking of the anti-theft door.

To realize that when the anti-theft door is locked, the lock bolt 14 can automatically extend to the outside of the lock panel 9. By setting the trigger member 16, the door frame pushes the trigger member 16 into the lock body 1, and the trigger lock bolt 14 extends out. 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 anti-theft door is in the open position, the trigger 16 protrudes to the outside of the lock panel 9 . The lock body 1 is provided with a drive mechanism that is drivingly coupled with the support plate 13. After the trigger member 16 is pushed into the lock body 1 by the door frame, the trigger member 16 acts, and the trigger drive mechanism promotes the lock bolt 14 to extend to the lock panel. 9 outside and insert into the door frame hole.

The driving mechanism may include a motor. After the trigger 16 is pressed into the lock body 1 , the motor starts to act on the support plate 13 through the transmission mechanism, so that the lock bolt 14 can be extended to the outside of the lock body 1 .

The drive mechanism can also include a drive plate 2, and the two ends of the spring act on the drive plate 2 and the lock body 1 respectively. The spring shown in FIG. 1 is a tension spring 7. The power of the driving plate 2 is provided by the tension spring 7 . In order to reduce the impact force generated when the drive plate 2 is activated, the lock body 1 is provided with a damper, and the damper is connected to the drive plate 2. When the drive plate 2 moves, the damper exerts a damping force on the drive plate 2 to reduce the The response speed after the small driver board 2 is triggered.

Between the drive plate 2 and the support plate 13 is a lock tongue turning plate 3 , the locking tongue turning plate 3 is curved, and the middle position of the locking tongue turning plate 3 is pivotally connected in the lock body 1 . One end of the lock tongue turning plate 3 is drivingly connected with the support plate 13 , and the other end is drivingly connected with the driving plate 2 . The driving board 2 is provided with a clamping structure, and after the clamping piece is clamped to the clamping structure, even if there is the pulling force of the tension spring 7, the driving board 2 is still in a static state. After the trigger 16 is pressed into the lock body 1 by the door frame, the trigger 16 disengages the clip from the clip structure, and releases the restraint of the clip on the drive plate 2 , and the drive plate 2 acts on the tension spring 7 . Move down. A driving paddle 5 is also fixedly sleeved on the above-mentioned paddle 12 in a circumferential direction. The outer end of the driving paddle 5 is connected with the driving plate 2 in a driving manner. When the door handle is rotated indoors, the driving paddle 5 is driven to drive the driving plate. 2. The reverse movement causes the tension spring 7 to open and the lock bolt 14 to retract inside the lock panel 9.

In order to facilitate the reverse reset of the driving board 2, the clamping structure is a movable arrangement. The clamping structure includes a clamping plate 8 that is stacked and pivoted on the driving board 2 , and a clamping head is formed on the clamping plate 8 , and the outer side surface of the clamping head is an inclined surface. A torsion spring can be sleeved at the pivot position of the clamping plate 8, or the clamping head can be elastically protruded to the outside of the driving plate 2 by means of a spring, so that the clamping head and the driving plate 2 are located at the side of the clamping head and the driving plate 2. A bayonet for clipping the clip is formed at the edge position.

The clamping part includes a base plate 6 pivotally connected in the lock body 1 , and the base plate 6 is in the shape of a straight plate, and can also be in the shape of a rod. A torsion spring may be sleeved at the pivot position on the base plate 6, or a spring may be arranged in the lock body 1 to keep the outer end of the base plate 6 moving away from the latch assembly. A movable member 17 connected to the trigger member 16 is provided on the outer side of the outer end of the base plate 6 , and the movable member 17 is used for engaging or disengaging the inner end of the base plate 6 from the clamping structure.

The trigger member 16 is disposed at the back of the oblique tongue block 11 , the trigger member 16 is a strip body, and the trigger member 16 protrudes to the outside of the back surface of the oblique tongue block 11 . The movable piece 17 is a sheet-like body and is T-shaped. The movable piece 17 is movably stacked 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. The movable member 17 is used to coincide with the position of the notch, or to match the position of the notch. separate from each other. A spring is provided on the connecting plate 10 , the spring acts on the movable member 17 , and through the movable member 17 , the trigger member 16 is protruded to the outside of the lock panel 9 .

A clutch plate 18 is also stacked on the base plate 6, and two parallel sliding grooves are arranged on the base plate 6. Two movable pins are arranged on the clutch plate 18, and the two sliding pins are respectively inserted into the two sliding grooves with a gap. It is used to provide a guiding function for the movement of the clutch plate 18 on the base plate 6 . The outer end of the clutch plate 18 is bent upward to form a folded edge to form a force-bearing structure, and the folded edge is located on the outer side of the support plate 13 in the lock body 1 . When the lock bolt 14 is completely extended to the outside of the lock panel 9 , the support plate 13 drives the clutch plate 18 to move toward the lock panel 9 by folding the edges. A blocking structure is provided on the oblique tongue block 11. The blocking structure can be the oblique tongue block 11 itself, the connecting plate 10 or a small convex body provided. The blocking structure restricts the movement of the base plate 6 toward the connecting plate 10 through the clutch plate 18. . The clutch plate 18 extends into the movement range of the oblique tongue block 11 in the lock body 1 . After the oblique tongue block 11 is retracted into the lock body 1 , the oblique tongue block 11 will push the clutch plate 18 to move in the direction of the drive plate 2 .

When closing the security door, the oblique tongue block 11 enters the door frame hole after being pushed by the door frame. During the process of being pushed, the oblique tongue block 11 will push the clutch plate 18 to move in the direction of the drive plate 2, and the clutch plate 18 will disengage. Blocking structure on the tongue assembly. The trigger member 16 is pressed by the door frame and enters the lock body 1, the movable member 17 is disengaged 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 in contact with the bayonet. Disengage and release the restraint on the drive board 2 . Under the pulling force of the tension spring 7 , in FIG. 1 , the driving plate 2 moves to the right side in the lock body 1 . When the drive plate 2 moves, as shown in Figure 5, the toggle pin on the drive plate 2 will slide in the sliding port at the lower right corner of the locking plate 4, which will disengage the latching end of the upper left corner of the locking plate 4 from the support plate 13 , the drive plate 2 pushes the support plate 13 to the outside through the lock tongue rotating plate 3 , so that the lock bolt 14 extends to the outside of the lock panel 9 .

There are two ways to open the anti-theft door, one is to use the handle to open indoors, and the other is to use the key to open.

When using the handle to open, turn the handle to drive the drive paddle 5 to sway, so that the drive plate 2 moves to the left direction in FIG. Retract into lock body 1. After the drive plate 2 is rotated in place, the bayonet formed at the position of the drive plate 2 is engaged with the inner end of the base plate 6 . A locking structure in the form of helical teeth can be provided on the support plate 13 at the clamping end of the locking plate 4. When the locking bolt 14 is retracted into the lock body 1, the locking structure and the locking plate 4 are locked. The terminals slide against each other. It is also possible to set a corresponding toggle structure on the toggle sleeve assembly, as shown in Figure 5, the toggle structure toggles the upper right corner of the locking plate 4, and can realize the latching end of the upper left corner of the locking plate 4 and the support plate. The locking structure on 13 is disengaged, so that the support plate 13 can move smoothly in the direction of the driving plate 2 . After the lock bolt 14 is retracted into the lock body 1, the handle continues to rotate, and the oblique tongue block 11 is retracted into the lock body 1 through the oblique tongue pick 15 to realize the complete opening of the door. When the oblique tongue block 1 is retracted into the lock body 1 , the oblique tongue block 11 will push the clutch plate 18 to reset. After the anti-theft door is opened, the trigger member 16 protrudes to the outside of the lock panel 9 , and the movable member 17 overlaps the notch on the connecting plate 10 .

When the key is used to open the door, its working mode is the same as that of the existing ordinary anti-theft door lock. It should be noted that the anti-theft door lock is vertically installed on the anti-theft door, that is, rotated 90 degrees counterclockwise as shown in FIG. 1 . When the lock bolt 14 is completely extended to the outside of the lock panel 9 , it will drive the clutch plate 18 to extend out, and the clutch plate 18 blocks the blocking structure on the oblique tongue assembly to restrain the movement of the drive plate 2 . When the key is used to open, the dial on the lock cylinder pushes the support plate 13 to move in the direction of the drive plate 2, so that the lock bolt 14 is completely retracted into the lock body 1, and finally pushes the oblique tongue plate 15 through the push plate to make the oblique tongue plate 15. The tongue block 11 is retracted into the lock body 1 . The movement of the tongue block 11 in turn resets the clutch plate 18 on the base plate 6 . In the process of retracting the lock bolt 14 driven by the supporting plate 13, the supporting plate 13 will push the driving plate 2 to overcome the pulling force of the tension spring 7 and move toward the left side as shown in FIG. The bayonet on 2 can be snapped onto the inner end of the base plate 6 . Due to the existence of the clutch plate 18 , before the oblique tongue block 11 is driven, due to the action of the clutch plate 18 and the blocking structure, the base plate 6 is in a relatively stable state, which is convenient for the bayonet to be clamped to the inner end of the base plate 6 . superior.

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.