A door lock that facilitates anti-locking and inward opening

Abstract

The present invention discloses a door lock that is convenient for anti-locking and inward opening, comprising a lock body, a lock tongue and a pulling-back mechanism. The lock tongue can pop out and cooperate with a lock catch box on the door frame. The pulling-back mechanism includes two inside-outside handle forks arranged inside and outside. The two inside-outside handle forks are respectively connected to two inside-outside handles. A lock core anti-locking mechanism, a handle downward pressing unlocking mechanism and a handle upward pulling anti-locking mechanism are provided on the lock body. The door lock of the present invention has fewer lock tongues, less noise, relatively small resistance when unlocking with the inner handle and the lock core, the mechanism is not easily damaged, and the product has a long service life; the lock tongue can be driven to perform anti-locking by rotating the handle upward, without using a key to operate the lock core, and the operation is relatively convenient; pressing down the inner handle can drive the lock tongue to retract, and the rotation angle required for the inner handle during unlocking is small, and the operation is more sensitive.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to a door lock which is convenient for rear locking and inner opening. Background Art

[0002] An escape lock is a lock that can be used to quickly open the door from indoors in an emergency. It is composed of a lock body, inner and outer handles, a cover plate and other components. Its working principle is that when the escape lock is locked, the outer handle can only drive the oblique tongue to retract and cannot unlock the square tongue. Therefore, from outside the door, you can only use the key to drive the dial to open the square tongue and then pull the outer handle to open the door; while the inner handle can unlock the square tongue and drive it to retract while driving the oblique tongue to retract. Therefore, in case of an emergency indoors, you only need to pull the inner handle to quickly open the door and escape. In a Chinese patent with publication number CN201377227Y, there is a lock body for an escape lock, including a lock seat, a square tongue, a square tongue connecting plate, a support plate, a slanted tongue, a slanted tongue connecting rod, an upper and lower bar fork, and a square bar swing piece sandwiched between the upper and lower bar forks, the upper and lower bar forks abut against the slanted tongue connecting rod, the linkage mechanism between the square bar swing piece and the square tongue connecting plate is a driving bar, the limiting groove in the middle of the driving bar is used to push the support plate, release the locking of the support plate to the square tongue connecting plate and limit the support plate, and the arc-shaped driving groove on the driving bar is used to drive the square tongue connecting plate to retract. The defects of the above-mentioned prior art are: 1. There are many lock tongues, and the resistance is relatively large when unlocking with the inner handle and the lock core, and the mechanism is easily damaged; 2. The square tongue needs a key or a knob to drive the lock core to rotate before it can be driven to lock, which is more troublesome to operate. Summary of the invention

[0003] The present invention aims to solve the problems existing in the above-mentioned prior art and provide a door lock which is convenient for reverse locking and inner opening. The reverse locking operation can be completed by lifting the handle, and quick unlocking can be achieved by pressing the inner handle downward.

[0004] The present invention solves the technical problem by adopting a technical solution: a door lock that is convenient for reverse locking and inner opening, comprising a lock body, a lock tongue and a pull-back mechanism, wherein the lock tongue is slidably mounted on the lock body, can pop out of the lock body and cooperate with a lock box on the door frame, and the pull-back mechanism comprises two inner and outer handle forks, which are rotatably connected and mounted on the lock body and can move the lock tongue back into the lock body, and the two inner and outer handle forks are respectively connected to two inner and outer handles, and the lock body is provided with a lock core reverse locking mechanism, a handle downward unlocking mechanism and a handle upward reverse locking mechanism;

[0005] The cylinder anti-lock mechanism is used for unlocking and anti-locking operations when the cylinder rotates. The cylinder anti-lock mechanism includes a cylinder dial and a fork locking member driven by the cylinder dial. A first transmission mechanism is provided between the cylinder dial and the fork locking member, and the fork locking member is slidably connected to the lock body. When the cylinder dial rotates forward by a certain angle, it drives the fork locking member to engage with the inside and outside handle forks, restricting the angle of its forward rotation to achieve anti-locking. When the cylinder dial continues to rotate backward by a certain angle, it drives the fork locking member to separate from the inside and outside handle forks, allowing it to rotate freely to achieve unlocking.

[0006] The handle downward unlocking mechanism is used to drive the fork locking member to separate from the inside and outside handle forks when the inner handle rotates forward by a certain angle, allowing it to rotate freely to achieve unlocking. The handle downward unlocking mechanism includes a second transmission mechanism, and the second transmission mechanism is arranged between the inner handle and the fork locking member.

[0007] The handle upward anti-lock mechanism is used to drive the fork locking member to engage with the inside and outside handle forks when the inner and / or outer handle rotates backward by a certain angle, restricting the angle of its forward rotation to achieve anti-locking. The handle upward anti-lock mechanism includes a third transmission mechanism, and the third transmission mechanism is arranged between the inner and / or outer handle and the fork locking member.

[0008] Further improved, the first transmission mechanism, the second transmission mechanism, and the third transmission mechanism all include a transmission connecting plate. The transmission connecting plate is rotatably connected to the lock body, and a driven arm is provided on the transmission connecting plate. The driven arm is used to drive the fork locking member to slide.

[0009] Further improved, the first transmission mechanism includes a power groove provided on the transmission connecting plate, and the power groove is matched with the cylinder dial.

[0010] Further improved, the second transmission mechanism includes a downward pressing dial and a driving member. The downward pressing dial is fixedly installed on the inner handle square bar, and the driving member is fixedly installed on the downward pressing dial. A driving arm is provided on the transmission connecting plate, and the driving arm is hinged to the driving member. A first downward pressing limit slot hole for blocking the forward rotation of the downward pressing dial is provided on the driving member.

[0011] Further improved, the third transmission mechanism includes an upward lifting dial and an upward lifting plate. The upward lifting dial is connected to the inner and / or outer handle, and the upward lifting plate is fixedly installed on the upward lifting dial. The upward lifting plate is fixedly connected to the driving member. An upward lifting limit slot hole for blocking the reverse rotation of the upward lifting dial is provided on the upward lifting plate.

[0012] Further improved, an inner and / or outer handle fork is also fixedly installed on the upward lifting dial, and a second downward pressing limit slot hole for blocking the forward rotation of the upward lifting dial is provided on the inner and / or outer handle fork.

[0013] For further improvement, the downward pressing dial wheel and the upward lifting dial wheel are provided with an external hexagonal pull block, and the first downward pressing limit slot, the upward lifting limit slot and the second downward pressing limit slot are internal hexagonal plum blossom slots, which cooperate with the external hexagonal pull block. The internal hexagonal plum blossom slots block the external hexagonal pull block in one rotation direction and have a certain amount of activity space in the other rotation direction.

[0014] For further improvement, the lock tongue and the lock box can be magnetically attracted, a first return spring is provided between the lock tongue and the lock body, and a second return spring is provided between the inner handle fork, the outer handle fork and the lock body.

[0015] For further improvement, the upper lifting plate is provided with a convex column, and the driving member is provided with an arc-shaped limiting groove that cooperates with the convex column.

[0016] Further improvement, the driven arm is provided with a toggle column, the fork lock is provided with a toggle groove, the toggle column matches the toggle groove, the fork lock is provided with a plurality of vertical slide grooves, the lock body is provided with a plurality of guide columns, the guide columns are correspondingly slidably connected with the vertical slide grooves, and a third reset spring is provided between the guide columns and the toggle column.

[0017] The beneficial effects of the present invention are as follows: 1. The number of lock tongues of the present invention is small, the noise is small, the resistance is relatively small when unlocking with the inner handle and the lock core, the mechanism is not easy to be damaged, and the product has a long service life; 2. The lock tongue can be driven to reverse lock by lifting and rotating the handle, and no key is required to operate the lock core, which is relatively convenient to operate; 3. Pressing down the inner handle can drive the lock tongue to retract, and the rotation angle required for the inner handle when unlocking is small, and the operation is more sensitive. 4. After reverse locking, the outer handle cannot be pressed down, which can extend the service life of the door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the lock cylinder anti-locking mechanism in the unlocked state with the handle fork resetting to the normal state;

[0019] Figure 2 It is a structural schematic diagram of the lock cylinder anti-locking mechanism when the handle fork is pressed down to unlock;

[0020] Figure 3 It is a structural schematic diagram of the lock core anti-locking mechanism in the anti-locking state;

[0021] Figure 4 To unlock the handle by pressing it down (refer to Figure 3 )Structural diagram of anti-locking;

[0022] Figure 5 To unlock the handle by pressing it down (refer to Figure 2 ) Schematic diagram of the structure when the inner handle is pressed down to unlock;

[0023] Figure 6Schematic diagram of the handle-down unlocking mechanism in the normal state of handle reset (refer to Figure 1 );

[0024] Figure 7 Schematic diagram of the handle-up anti-locking mechanism in the normal state of reset (refer to Figure 6 );

[0025] Figure 8 Schematic diagram of the handle-up anti-locking mechanism when the handle is lifted to anti-lock (refer to Figure 4 );

[0026] Figure 9 Schematic diagram of the handle-up anti-locking mechanism in the normal state of the lifting plate reset (refer to Figure 3 );

[0027] Figure 10 Schematic diagram of the overall lock assembly in the normal state of reset when anti-locked (refer to Figure 9 and Figure 3 );

[0028] Figure 11 Schematic diagram of the overall lock assembly when unlocking by pressing down the inner handle (refer to Figure 5 and Figure 2 );

[0029] Figure 12 Schematic diagram of the overall lock assembly in the normal state of reset when unlocking (refer to Figure 6 and Figure 1 );

[0030] Figure 13 Schematic diagram of the overall lock assembly when lifting to anti-lock (refer to Figure 8 and Figure 6 );

[0031] Figure 14 Schematic diagram of the parts fixedly installed on the inner and outer handle square bars respectively;

[0032] Figure 15 Installation diagram of the inner and outer handle square bars;

[0033] Explanation of the accompanying drawings: 1, lock body, 2, lock tongue, 3, handle fork, 4, lock cylinder dial wheel, 5, fork locking member, 6, transmission connecting plate, 7, driven arm, 8, power groove, 9, downward pressing dial wheel, 10, driving member, 11, active arm, 12, first downward pressing limit slot, 13, upper lifting dial wheel, 14, upper lifting dial plate, 15, upper lifting limit slot, 16, second downward pressing limit slot, 17, external hexagonal pull block, 18, boss, 19, first return spring, 20, second return spring, 21, toggle column, 22, toggle groove, 23, vertical slide groove, 24, guide column, 25, third return spring, 26, arc limit slot, 27, inner handle square strip, 28, outer handle square strip, 29, handle spring, 30, inner handle, 31, outer handle. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] Referring to the accompanying drawings: In this embodiment, a door lock that is convenient for reverse locking and inner opening comprises a lock body 1, a lock tongue 2 and a pull-back mechanism, wherein the lock tongue 2 is slidably mounted on the lock body 1, can pop out of the lock body 1 and cooperate with the lock box on the door frame, the pull-back mechanism comprises two handle forks 3 arranged inside and outside, the handle forks 3 are rotatably connected and mounted on the lock body 1, and can pull the lock tongue 2 back into the lock body 1, the two inside and outside handle forks 3 are respectively connected to the two inside and outside handle square bars, and the two inside and outside handle square bars are respectively fixedly connected to the two inside and outside handles, and the lock body 1 is provided with a lock core reverse locking mechanism, a handle pressing unlocking mechanism and a handle lifting reverse locking mechanism;

[0036] As attached Figures 1 - 3 As shown, the lock cylinder anti-locking mechanism is used for unlocking and anti-locking operations when the lock cylinder rotates. The lock cylinder anti-locking mechanism includes a lock cylinder dial wheel 4 and a fork locking member 5 driven by the lock cylinder dial wheel 4. A first transmission mechanism is provided between the lock cylinder dial wheel 4 and the fork locking member 5, and the fork locking member 5 is slidably connected with the lock body 1; when the lock cylinder dial wheel 4 rotates forward by a certain angle, the driving fork locking member 5 is combined with the inner and outer handle forks 3 to stop their rotation and limit their forward rotation angle to achieve anti-locking; when the lock cylinder dial wheel 4 continues to rotate in the reverse direction by a certain angle, the driving fork locking member 5 is separated from the inner and outer handle forks 3, so that they can rotate freely to achieve unlocking;

[0037] As attached Figures 4 - 6 As shown, the handle push-down unlocking mechanism is used to drive the fork locking member 5 to separate from the inner and outer handle forks 3 when the inner handle is rotated forward by a certain angle, so that the inner and outer handle forks 3 can rotate freely to achieve unlocking. The handle push-down unlocking mechanism includes a second transmission mechanism, which is arranged between the inner handle (square bar) and the fork locking member 5;

[0038] As attached Figures 7 - 9As shown, the handle lifting anti-locking mechanism is used to drive the fork locking member 5 to engage with the inner and outer handle forks 3 when the inner and / or outer handles are rotated in the opposite direction by a certain angle, thereby limiting the angle of forward rotation and achieving anti-locking; the handle lifting anti-locking mechanism includes a third transmission mechanism, which is arranged between the inner and / or outer handles (square bars) and the fork locking member 5.

[0039] How to use: Forward rotation and reverse rotation can be understood as the clockwise rotation and counterclockwise rotation of the inner handle, that is, the so-called pressing down and lifting up. After closing the door, the lock tongue 2 can pop out and cooperate with the lock box on the door frame, and the retraction mechanism can drive the lock tongue 2 to retract into the lock body 1 through the handle fork 3. In addition to the conventional use of a key or knob to drive the lock cylinder anti-locking mechanism for anti-locking and unlocking functions, the lock also has the function of lifting the inner and outer handles for quick anti-locking and the function of pressing the inner handle for quick unlocking.

[0040] Internal and external handles can be quickly locked by lifting: Figure 12 As shown, when the lock is in the unlocked state, the handle fork 3 is driven to rotate by pressing down the inner and outer handles, so that the lock tongue 2 inserted into the lock box can be pulled back into the lock body 1 to open the door; Figure 12 As shown in FIG. 1 , if the inner or outer handle is lifted and rotated to a certain angle, the third transmission mechanism can drive the fork locking member 5 to move upward, restricting the clockwise rotation of the handle fork 3 to achieve reverse locking, and the outer handle cannot be pressed down at this time. Figure 10 shown.

[0041] Inner handle push down quick unlock function: as attached Figure 11 As shown in the figure, after the lock is locked, if the inner handle is directly pressed down, the second transmission mechanism can drive the fork lock member 5 to move downward to unlock the door. At the same time, the inner handle fork 3 rotates to pull the lock tongue 2 back into the lock body 1 to open the door. Figure 12 shown.

[0042] As attached Figure 1 The first transmission mechanism, the second transmission mechanism and the third transmission mechanism all include a transmission link plate 6, which is rotatably connected to the lock body 1, and a driven arm 7 is provided on the transmission link plate 6, which is used to drive the fork lock 5 to slide. The driven arm 7 is provided with a toggle column 21, and the fork lock 5 is provided with a toggle groove 22, the toggle column 21 cooperates with the toggle groove 22, and the toggle groove 22 can have some gaps, which are in a movable hinged manner and will not interfere with movement.

[0043] The shift fork lock 5 is provided with a plurality of vertical slide grooves 23, and the lock body 1 is provided with a plurality of guide posts 24, which are slidably connected with the vertical slide grooves 23. The shift fork lock 5 is a U-shaped bending sheet structure, with two sides, each with two vertical slide grooves 23, and slides smoothly. A third reset spring 25 is provided between the guide post 24 and the shifting post 21. The third reset spring 25 can overcome a certain elastic force required for unlocking and reflecting, improve the operating feel, and prevent loose parts from causing inaccurate positioning.

[0044] The first transmission mechanism includes a power slot 8 provided on the transmission link plate 6, and the power slot 8 cooperates with the lock core dial wheel 4. When the lock core dial wheel 4 rotates clockwise, the paddle of the lock core dial wheel 4 engages with the power slot 8, driving the transmission link plate 6 to rotate counterclockwise, thereby driving the shift fork locking member 5 to move downward to unlock the lock. Figure 2 When the lock cylinder dial wheel 4 rotates counterclockwise, the dial of the lock cylinder dial wheel 4 engages the power slot 8, driving the transmission link plate 6 to rotate clockwise, thereby driving the shift fork locking member 5 to move upward to achieve reverse locking, as shown in the attached Figure 3 shown.

[0045] As attached Figures 4 - 6 The second transmission mechanism comprises a downward pressing wheel 9 and a driving member 10. The downward pressing wheel 9 is fixedly mounted on the inner handle (square bar), the driving member is fixedly mounted on the downward pressing wheel 9, and the transmission connecting plate 6 is provided with an active arm 11, which is hinged to the driving member 10; the driving member 10 is provided with a first downward pressing limit slot 12 for blocking the positive rotation of the downward pressing wheel 9. When the inner handle is pressed down, the downward pressing wheel 9 on the inner handle square bar drives the driving member 10 to rotate clockwise, and drives the transmission connecting plate 6 to rotate counterclockwise through the active arm 11, thereby controlling the driving fork locking member 5 to move downward to achieve unlocking.

[0046] As attached Figures 4 - 6 The third transmission mechanism includes an upper lifting dial wheel 13 and an upper lifting dial plate 14. The upper lifting dial wheel 13 is fixedly mounted on the inner and / or outer handle (square bar), and the upper lifting dial plate 14 is fixedly mounted on the upper lifting dial wheel 13. The upper lifting dial plate 14 is fixedly connected to the driving member 10; the upper lifting dial plate 14 is provided with an upper lifting limit slot 15 for blocking the reverse rotation of the upper lifting dial wheel 13. When the inner and / or outer handle is lifted, the upper lifting dial wheel 13 on the inner and / or outer handle (square bar) drives the upper lifting dial plate 14 to rotate counterclockwise, and the upper lifting dial plate 14 drives the driving member 10 to rotate counterclockwise, and drives the transmission connecting plate 6 to rotate clockwise through the active arm 11, thereby controlling the driving fork locking member 5 to move upward to achieve reverse locking.

[0047] An inner and / or outer handle fork 3 is also fixedly installed on the lifting pulley 13. The inner and / or outer handle fork 3 is provided with a second downward pressing limit slot hole 16 for blocking the forward rotation of the lifting pulley 13. When the two inner and outer handles (square bars) rotate clockwise, the two inner and outer handle forks 3 can be respectively driven by the two lifting pulleys 13 to rotate clockwise to realize door opening.

[0048] As shown in the Figure 14 accompanying drawings, if there are handles on both sides of the lock, there are two sets of handle lifting and anti-locking mechanisms and one set of handle downward pressing and unlocking mechanisms in the lock. One downward pressing pulley 9 in the middle and two lifting pulleys 13 on both sides are stacked together, which is a three-piece square core structural design. As shown in the Figure 15 accompanying drawings, the inner ends of the inner handle square bar and the outer handle square bar are of different lengths. The specification size of the square bar is 8×8mm. The inner ends of the inner handle square bar and the outer handle square bar are respectively provided with a plug pin and a plug hole. The inner handle square bar and the outer handle square bar are rotationally connected by inserting and buckling with a plug pin and are connected together by a spring. Square bar installation: Put springs on both sides of the square bar, and correspondingly put the square bar outside the door on the outside direction of the lock body. The spring can be placed inside the door handle (handle). The downward pressing pulley 9 and the lifting pulley 13 are fixedly installed on the inner handle square bar, accounting for about 2 / 3 of the length, and have the functions of quick lifting and anti-locking and quick downward pressing and unlocking. The downward pressing pulley 9 is fixedly installed on the outer handle square bar, accounting for about 1 / 3 of the length, and has the function of quick lifting and anti-locking, but does not have the function of quick downward pressing and unlocking.

[0049] The downward pressing pulley 9 and the lifting pulley 13 are provided with an external hexagonal wrenching block 17. The first downward pressing limit slot hole 12, the lifting limit slot hole 15 and the second downward pressing limit slot hole 16 are internal hexagonal plum blossom slots. The internal hexagonal plum blossom slots cooperate with the external hexagonal wrenching block 17. The internal hexagonal plum blossom slots block the external hexagonal wrenching block 17 in one rotation direction and have a certain movement space in the other rotation direction. In this way, when the lifting pulley 13 is lifted by a certain angle, it will not drive the handle fork 3 to move, and when the driving member 10 is driven by the lock core to unlock and anti-lock, it will not drive the downward pressing pulley 9 and the lifting pulley 13 to move, which can reduce the resistance during operation.

[0050] The lifting plate 14 is provided with a convex column 18, and the driving member 10 is provided with an arc-shaped limit slot 26 that cooperates with the convex column 18. During the lifting operation, the lifting plate 14 can drive the driving member 10 to rotate counterclockwise through the cooperation of the convex column 18 and one end of the arc-shaped limit slot 26 to realize anti-locking; then the lifting plate 14 returns to the right with the handle fork 3. During the downward pressing operation, the lifting plate 14 can drive the driving member 10 to rotate clockwise through the cooperation of the convex column 18 and the other end of the arc-shaped limit slot 26 to realize unlocking.

[0051] The present invention can be applied to a diagonal bolt lock. The diagonal bolt automatically pops out through a spring inside the lock. However, if the bolt 2 and the latch box can be magnetically attracted to each other, the type of the lock is limited to a magnetic silent lock. The bolt works on the principle of magnetic attraction between opposite poles of magnets. When the door is closed, the bolt automatically extends and is attracted. A first return spring 19 is provided between the bolt 2 and the lock body 1. The first return spring 19 can ensure that the bolt 2 retracts into the lock body 1 when not affected by magnetic force, avoiding being thrown out. The bolt of the magnetic lock relies on a magnet on the door frame to attract the bolt to lock the door. When unlocking, the handle is used to unlock, and the bolt is operated to retract into the lock body inside the door body. The first return spring 19 is a tension spring, and the tension spring applies a force to retract the bolt inward. A second return spring 20 is provided between the inner and outer handle forks 3 and the lock body 1, which can realize the reset of the inner and outer handle forks 3 to maintain the reset normal state of the lock.

[0052] Although the present invention has been illustrated and described with reference to the preferred embodiments, those skilled in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. A door lock that is convenient for locking and opening from the inside, comprising a lock body (1), a lock tongue (2) and a retraction mechanism, wherein the lock tongue (2) is slidably mounted on the lock body (1) and can pop out of the lock body (1) and cooperate with a lock box on a door frame, and the retraction mechanism comprises two inner and outer handle forks (3), the handle forks (3) are rotatably connected and mounted on the lock body (1), and can move the lock tongue (2) to retract into the lock body (1), and the two inner and outer handle forks (3) are respectively connected to an inner handle and an outer handle, and the characteristics are: The lock body (1) is provided with a cylinder anti-lock mechanism, a handle-pressing unlocking mechanism and a handle-lifting anti-lock mechanism; The cylinder anti-lock mechanism includes a cylinder dial (4) and a fork locking member (5) driven by the cylinder dial (4). A first transmission mechanism is provided between the cylinder dial (4) and the fork locking member (5). The fork locking member (5) is slidably connected to the lock body (1); The handle-pressing unlocking mechanism includes a second transmission mechanism, and the second transmission mechanism is arranged between the inner handle and the fork locking member (5); The handle-lifting anti-lock mechanism includes a third transmission mechanism, and the third transmission mechanism is arranged between the inner handle and / or the outer handle and the fork locking member (5); The first transmission mechanism, the second transmission mechanism and the third transmission mechanism all include a transmission connecting plate (6). The transmission connecting plate (6) is rotatably connected to the lock body (1). A driven arm (7) is provided on the transmission connecting plate (6), and the driven arm (7) is used to drive the fork locking member (5) to slide; The first transmission mechanism includes a power groove (8) provided on the transmission connecting plate (6), and the power groove (8) is matched with the cylinder dial (4); The second transmission mechanism includes a pressing dial (9) and a driving member (10). The inner handle is connected to the pressing dial (9), and a driving member is fixedly installed on the pressing dial (9). A driving arm (11) is provided on the transmission connecting plate (6), and the driving arm (11) is hinged to the driving member (10); A first pressing limit slot hole (12) is provided on the driving member (10); The third transmission mechanism includes a lifting dial (13) and a lifting plate (14). The inner handle and / or the outer handle is connected to the lifting dial (13), and a lifting plate (14) is fixedly installed on the lifting dial (13). The lifting plate (14) is fixedly connected to the driving member (10); A lifting limit slot hole (15) is provided on the lifting plate (14).

2. The door lock that is convenient for anti-locking and inward opening according to claim 1, wherein: An inner and / or outer handle fork (3) is also fixedly installed on the lifting dial (13), and a second pressing limit slot hole (16) is provided on the inner and / or outer handle fork (3).

3. The door lock according to claim 2, which is convenient for anti-locking and inward opening, is characterized in that: External hexagonal turning blocks (17) are provided on the pressing dial (9) and the lifting dial (13). The first pressing limit slot hole (12), the lifting limit slot hole (15) and the second pressing limit slot hole (16) are inner hexagonal plum blossom slots, and the inner hexagonal plum blossom slots are matched with the external hexagonal turning blocks (17).

4. A door lock that is convenient for anti-locking and inward opening according to claim 1, characterized in that: A convex column (18) is provided on the lifting plate (14), and an arc-shaped limit slot (26) matched with the convex column (18) is provided on the driving member (10).

5. The door lock that is convenient for anti-locking and inward opening according to claim 1, characterized in that: The lock tongue (2) and the lock catch box are magnetically attracted to each other. A first return spring (19) is provided between the lock tongue (2) and the lock body (1), and a second return spring (20) is provided between the two inner and outer handle forks (3) and the lock body (1).

6. The door lock that is convenient for anti-locking and inward opening according to claim 1, characterized in that: A shifting column (21) is provided on the driven arm (7), a shifting groove (22) is provided on the fork locking member (5), the shifting column (21) is matched with the shifting groove (22), a plurality of vertical sliding grooves (23) are provided on the fork locking member (5), a plurality of guiding columns (24) are provided on the lock body (1), the guiding columns (24) are slidably connected with the vertical sliding grooves (23) correspondingly, and a third return spring (25) is provided between the guiding column (24) and the shifting column (21).

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