CN210888345U - Anti-theft door lock - Google Patents

Abstract

The utility model relates to a theft-proof door lock, which comprises a panel and a handle, wherein the handle is rotatably arranged on the panel, the panel is rotatably provided with a limit cover and a square sleeve, the panel is also provided with a reset piece for resetting the limit cover and the square sleeve, the handle is provided with a button, the cooperation of sliding along square strip sleeve axial with the handle is pressed to the button, the button sets up with handle circumference linkage, press down the button and can realize that handle and square strip telescopic circumference linkage are equipped with the transmission cover that is used for realizing spacing lid and the synchronous linkage of handle circumference between handle and panel, the transmission is sheathe in and is equipped with the stopper, the rotatable cover of stopper is established on square strip sleeve, square strip sleeve is equipped with restriction stopper pivoted conflict portion in the one side that is close to the stopper, conflict portion sets up around square strip sleeve circumference, the shared angle of conflict portion is less than 180 degrees, be equipped with in the conflict portion and contradict the first butt end and the second butt end of realizing lifting the locking handle with the stopper respectively. The utility model provides a security door lock, the handle switching-over is convenient.

Description

Anti-theft door lock

Technical Field

The utility model relates to a security door lock.

Background

In chinese patent CN201721800284.8, a door lock for preventing peep hole from unlocking is disclosed, when the button is not pressed, the button is located in the button accommodating cavity, the long rib thereon can be inserted into the slot on the rotating shaft, the long rib and the slot have a stroke space in the axial direction, and the square strip sleeve and the limit cover can move independently. When the handle is pressed down, the handle drives the limiting cover to rotate clockwise, the square strip sleeve is kept still, and the lock cannot be unlocked; when lifting the handle, spacing lid is along with handle anticlockwise rotation, and the stopper continues to support each other with the telescopic end that blocks of square strip this moment and leans on, and the anticlockwise upset of square strip sleeve is equipped with the square strip in the square strip sleeve, and the square strip is also called the square core, and the square strip reversal to make the lock body can the lock. However, when the door lock is reversed on the left and right sides of the handle, the limiting blocks need to be removed from the cover surface, the limiting blocks are mounted on the other side of the blocking end of the limiting plate, the door lock can be reversely locked by the blocking end of the square bar sleeve after the handle is reversed, the reversing step of the whole handle is complex, the limiting blocks need to be disassembled and assembled by special tools, and the operation is complex.

Disclosure of Invention

The utility model aims at: in order to overcome the defects of the prior art, the utility model provides a make things convenient for security door lock of handle switching-over, simple structure, convenient operation, swift.

The technical scheme of the utility model: a security door lock comprises a panel and a handle, wherein the handle is rotatably arranged on the panel, the panel is rotatably provided with a limit cover and a square sleeve, the panel is also provided with a reset part for resetting the limit cover and the square sleeve, the handle is provided with a button, the button and the handle are matched with each other in a sliding way along the axial direction of the square sleeve, the button is in circumferential linkage with the handle, the button can realize circumferential linkage of the handle and the square sleeve when pressed downwards, a transmission sleeve for realizing circumferential synchronous linkage of the limit cover and the handle is arranged between the handle and the panel, the transmission sleeve is fixedly connected or integrally provided with a limit block, the limit block can be rotatably sleeved on the square sleeve, one side of the square sleeve close to the limit block is provided with a limit block rotating conflict part, the conflict part is arranged around the circumferential direction of the square sleeve, and the occupied angle of the conflict part is less than 180 degrees, the both ends of conflict portion are first conflict end and second conflict end respectively, the handle have two kinds of installation status, when the handle is first installation status, the button does not press down, it can make stopper and first conflict end conflict realize transmission cover and square strip sleeve circumference synchronous rotation to lift on hand the stopper can be rotated to keeping away from first conflict end one side around square strip sleeve, when the handle is second kind of installation status, the button does not press down, lift on hand and can make stopper and second conflict end conflict realize transmission cover and square strip sleeve circumference synchronous rotation, press on hand the stopper can be rotated to keeping away from second conflict end one side around square strip sleeve.

By adopting the technical scheme, when the handle is in a first installation state, the button is not pressed, the handle and the square strip sleeve are in a separated state, the handle is pressed down to be idle, the button cannot drive the square strip sleeve to rotate, the limiting block of the transmission sleeve rotates around the square strip sleeve to one side far away from the first contact end, the transmission sleeve drives the limiting cover to synchronously rotate, the square strip sleeve is kept still and cannot be unlocked, and after the handle is loosened, the resetting piece drives the limiting cover to reset, so that the handle synchronously linked with the circumferential direction of the transmission sleeve resets again; when lifting during the handle, the transmission cover antiport this moment, stopper and first conflict end are contradicted and are realized the synchronous rotation of circumference of square strip sleeve and stopper, and are equipped with the square strip in the square strip sleeve, and the square strip is also called the square core, and the square strip reversal to make the lock body can the counter lock, consequently lift the handle when not pressing the button and also can realize the counter lock.

When the handle is located first installation state, press the button, the button rotates with square strip sleeve circumference synchronization, pushes down the handle this moment, realizes that square strip sleeve drive square strip rotates and unblanks, reset spring compression.

When the handle was commuted to second kind installation status by first kind installation status, the handle rotated 180 to the opposite side, square strip sleeve fixed, the transmission cover together rotate the same angle with the handle, the stopper on the transmission cover corresponds the setting of second conflict end this moment, can drive stopper and second conflict end conflict drive square strip sleeve and stopper synchronous rotation realization square strip locking on hand portion is lifted. Because the shared angle of conflict portion is less than 180 degrees, does not influence the cooperation of second butt end and stopper when the handle switching-over is the second kind of state and uses, and need not also to change the adjustment along with the handle with the position of first butt end, just can realize changing the locking of lifting to the back handle, can realize the quick switching-over of handle very well to the installation of the two kinds of direction door bodies that open the door matches, the practicality is strong.

The utility model discloses a further setting: the spacing lid middle part be equipped with and supply the transmission cover tip to insert the socket of establishing, have two inserted blocks that correspond the setting each other on the socket inner wall, the transmission cover tip is seted up and is supplied the inserted block to insert the breach of establishing, the inserted block insert and establish and realize the synchronous linkage setting of circumference of spacing lid and transmission cover in the breach that corresponds, the stopper setting is served at the transmission cover one of establishing the breach.

Adopt the aforesaid to further set up again, convenient assembling between transmission cover and the spacing lid, during the assembly, the transmission cover wear to establish the socket, the breach conflict can realize the synchronous linkage setting of circumference of spacing lid and transmission cover on the inserted block, and transmission cover reverse slip break away from the inserted block until the breach, can realize the separation of transmission cover and spacing lid.

The utility model discloses a further setting: be equipped with first protruding muscle on the transmission cover outer wall, first protruding muscle along square strip sleeve axial extension, correspond first protruding muscle position on the handle inner wall and be equipped with first draw-in groove, first protruding muscle card establish and realize the circumference linkage of transmission cover and handle in first draw-in groove.

By adopting the above further arrangement, the transmission sleeve and the handle are separately processed conveniently, the matching between the transmission sleeve and the handle is simple, and the synchronous rotation of the transmission sleeve and the handle in the circumferential direction is realized by clamping the first convex rib at the interface in the first clamping groove.

The utility model discloses a further setting: the square strip sleeve comprises a square shaft sleeve and a limiting plate fixedly or integrally arranged on the square shaft sleeve, and limiting plates capable of being abutted with a reset piece to realize reset of the square shaft sleeve are arranged on two opposite sides of the limiting plate.

Adopt the aforesaid to further set up again, receive the hand drive back that lifts at the square shaft cover, the spacing piece of one side contradict with the piece that resets for the piece atress that resets warp, receive key drive antiport back at the square shaft cover, the piece drive square shaft cover that resets reset for the stopper is contradicted with the end of contradicting, is convenient for lift the drive square shaft cover on hand and rotates.

The utility model discloses a further setting: the handle including connecting portion and handle portion, connecting portion and handle portion fixed connection or integrative setting, connecting portion rotate and install on the panel, be equipped with driving medium and reset spring between button and square strip sleeve, the button install on the rear end portion of connecting portion, the button rear end portion exposes outside connecting portion, the driving medium setting is in the place ahead of button, reset spring locates between button and the driving medium drive button and driving medium separation, press the button can make button and driving medium cooperation realize the synchronous rotation of circumference between them, wear to be equipped with the mounting between driving medium and square strip sleeve.

Adopt the aforesaid to further set up again, the button is pressed into and is contradicted the cooperation with the driving medium, but push down handle portion this moment and drive connecting portion, the button, the driving medium is synchronous to be rotated to realize that square strip sleeve drive square strip rotates and unblank, reset spring compression, reset spring action makes the button reset and the driving medium is in the detached state when the button is not pressed into by external force, it is idle running to press down the handle portion this moment, the button can not drive the driving medium and rotate, can't unblank, reach the purpose of preventing opening.

The utility model discloses a further setting: the back tip of driving medium is equipped with the transmission piece, transmission piece and driving medium fixed connection or integrative setting, the transmission piece is followed square strip sleeve axial and is extended, be equipped with on the preceding tip of button and supply the transmission piece to insert the slot of establishing, slot front end opening, the transmission piece insert and establish the circumference synchronous rotation of realizing button and driving medium in the slot.

Adopt above-mentioned further setting again, the simple structure of button and driving medium, processing are convenient, realize the synchronous rotation of button and driving medium through the cooperation of transmission piece and slot.

The utility model discloses a further setting: the button outer wall on be equipped with the protruding muscle of second, the connecting portion inner wall corresponds the protruding muscle position of second and is equipped with the second draw-in groove, the second draw-in groove is along square strip sleeve axial extension, the protruding muscle of second slide and set up in the second draw-in groove realize the circumference linkage of button and connecting portion and to the direction to button along square strip sleeve axial slip.

Adopt the aforesaid to further set up again, simple structure, convenient operation, the protruding muscle of second of button slides and sets up in the second draw-in groove of connecting portion, can realize simultaneously that button and connecting portion circumference go up synchronous rotation to and spacing to button endwise slip to avoid the button to produce the skew when sliding, thereby can't rotate with the driving medium cooperation.

The utility model discloses a further setting: the driving medium rear end extends there is the connecting block, and the transmission piece sets up on the connecting block outer wall, be equipped with the connection chamber that matches with the connecting block on the button front end, the slot is located and connects the chamber lateral wall, is equipped with the spring installation chamber on the connecting block, reset spring one end conflict on connecting the chamber diapire, the reset spring other end is contradicted on the spring installation chamber diapire.

Adopt the aforesaid to further set up again, the connecting block inserts the connection intracavity, and in the slot was inserted to the transmission piece, the conflict cooperation of realization button and driving medium, the linkage is convenient, and the setting of connecting chamber and spring installation chamber, is convenient for to reset spring's installation location, makes it block all the time establish in connecting chamber and spring installation intracavity, does not squint, and the reset button effect is better.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a right side view of FIG. 1, with the direction indicated by arrow a being forward;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view of a portion I of FIG. 4;

FIG. 6 is an internal structural view of an embodiment of the present invention;

FIG. 7 is an assembly view of the driving sleeve and the square bar sleeve according to the embodiment of the present invention;

FIG. 8 is a diagram of a driving sleeve according to an embodiment of the present invention;

FIG. 9 is a block diagram of a square strip sleeve according to an embodiment of the present invention;

FIG. 10 is a diagram of a structure of a position-limiting cover according to an embodiment of the present invention;

FIG. 11 is a view of the structure of the handle according to an embodiment of the present invention;

FIG. 12 is an assembly view of the push button and the driving member according to the embodiment of the present invention;

FIG. 13 is a diagram of a button according to an embodiment of the present invention;

fig. 14 is a structural diagram of a transmission member according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indications (such as up, down, front, and back … …) in the description of the present invention are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in figures 1-14, the anti-theft door lock of the utility model comprises a panel 1 and a handle 2, the handle 2 is rotatably mounted on the panel 1, a limit cover 3 and a square sleeve 4 are rotatably mounted on the panel 1, a reset piece 5 for resetting the limit cover 3 and the square sleeve 4 is further mounted on the panel 1, a button 6 is mounted on the handle 2, the button 6 is in sliding fit with the handle 2 along the axial direction of the square sleeve 4, the button 6 is in circumferential linkage with the handle 2, the circumferential linkage of the handle 2 and the square sleeve 4 can be realized by pressing the button 6, a transmission sleeve 7 for realizing circumferential synchronous linkage of the limit cover 3 and the handle 2 is arranged between the handle 2 and the panel 1, a limit block 8 is fixedly connected or integrally arranged on the transmission sleeve 7, the limit block 8 is rotatably sleeved on the square sleeve 4, a limit stop part 9 for limiting the rotation of the limit block 8 is arranged on one side of the square sleeve 4 close to the limit block 8, the interference parts 9 are arranged around the circumference of the square strip sleeve 4, the angle occupied by the interference parts 9 is less than 180 degrees, the two ends of the interference part 9 are respectively a first contact end 91 and a second contact end 92, the handle 2 has two installation states, when the handle 2 is in the first installation state, the button 6 is not pressed down, the handle 2 is lifted up to enable the limit block 8 to be abutted against the first abutting end 91 to realize circumferential synchronous rotation of the transmission sleeve 7 and the square bar sleeve 4, the handle 2 is pressed down to enable the limit block 8 to rotate around the square bar sleeve 4 to one side far away from the first abutting end 91, when the handle 2 is in the second installation state, the button 6 is not pressed down, the handle 2 is lifted up to enable the limiting block 8 to be abutted against the second abutting end 92 so as to realize circumferential synchronous rotation of the transmission sleeve 7 and the square bar sleeve 4, and the handle 2 presses down the limiting block 8 to rotate around the square bar sleeve 4 to one side far away from the second abutting end 92; the middle part of the limiting cover 3 is provided with a socket 31 for inserting the end part of the transmission sleeve 7, the inner wall of the socket 31 is provided with two insertion blocks 311 which are arranged correspondingly with each other, the end part of the transmission sleeve 7 is provided with a gap 71 for inserting the insertion blocks 311, the insertion blocks 311 are inserted in the corresponding gaps 71 to realize the circumferential synchronous linkage arrangement of the limiting cover 3 and the transmission sleeve 7, and the limiting block 8 is arranged at one end of the transmission sleeve 7 provided with the gap 71; a first convex rib 72 is arranged on the outer wall of the transmission sleeve 7, the first convex rib 72 extends axially along the square sleeve 4, a first clamping groove 211 is arranged on the inner wall of the handle 2 corresponding to the first convex rib 72, and the first convex rib 72 is clamped in the first clamping groove 211 to realize circumferential linkage of the transmission sleeve 7 and the handle 2; the square strip sleeve 4 comprises a square strip sleeve 41 and a limiting plate 42 fixedly or integrally arranged on the square strip sleeve 41, and limiting pieces 421 which can be in interference fit with the reset piece 5 to realize the reset of the square strip sleeve 41 are arranged on two opposite sides of the limiting plate 42; handle 2 including connecting portion 21 and handle portion 22, connecting portion 21 and handle portion 22 fixed connection or integrative setting, connecting portion 21 rotates and installs on panel 1, is equipped with driving medium 10 and reset spring 11 between button 6 and square strip sleeve 4, button 6 install on the rear end of connecting portion 21, the tip exposes outside connecting portion 21 behind the button 6, driving medium 10 sets up in the place ahead of button 6, reset spring 11 locates between button 6 and the driving medium 10 the separation of actuating button 6 and driving medium 10, press button 6 can make button 6 and the cooperation of driving medium 10 realize the synchronous rotation of circumference between them, wear to be equipped with mounting 12 between driving medium 10 and square strip sleeve 4.

When the handle 2 is in a first installation state, the button 6 is not pressed, the transmission part 10 and the square strip sleeve 4 are in a separation state, the pressing handle part 22 is idle at the moment, the button cannot drive the square strip sleeve 4 to rotate, the limiting block 8 of the transmission sleeve 7 rotates around the square strip sleeve 4 to the side far away from the first contact end 91, the transmission sleeve 7 drives the limiting cover 3 to synchronously rotate, the square strip sleeve 4 is kept still and cannot be unlocked, and after the handle part 22 is loosened, the resetting part 4 drives the limiting cover 3 to reset, so that the handle 2 which is synchronously linked with the circumferential direction of the transmission sleeve 7 resets again; when lifting handle portion 22, 7 antiport of transmission cover this moment, stopper 8 and first conflict end 91 are contradicted and are realized square strip sleeve 4 and 8 circumference synchronous rotation of stopper, and the square strip is equipped with in the square strip sleeve 4, the square strip is also called the square core, the square strip reversal, thereby make the lock body can the counter-lock, consequently, go up when not pressing button 6 and carry handle portion 22 and also can realize the counter-lock, and when carrying the lock on handle 22, limiting plate 42's one side spacing piece 421 with reset 5 and contradict, make 5 atress that resets warp, receive key drive antiport back at square strip sleeve 41, reset 5 drive square strip sleeve 41 and reset.

When handle 2 was located first kind installation state, pressed button 6, connecting portion 21, button 6, driving medium 10 synchronous rotation, driving medium 10 and square strip sleeve 4 fixed connection push down handle portion 22 this moment, realize square strip sleeve 4 drive square strip and rotate and unblank, reset spring 11 compression.

When handle 2 is commuted to second kind installation status by first kind installation status, with mounting 12 from square strip cover 41 internal rotation, handle 2 is backward separated with panel 1, transmission cover 7 backward slide until breach 71 breaks away from inserted block 311, handle portion 22 rotates 180 to the opposite side, square strip sleeve 4 fixed motionless, transmission cover 5 and handle 2 together rotate the same angle, stopper 6 on the transmission cover 5 corresponds second and supports the setting of touching end 92 this moment, lifting on handle portion 22 can drive stopper 6 and second and support and touch end 92 and contradict drive square strip sleeve 7 and realize the square strip locking with stopper 6 synchronous rotation. Because the shared angle of conflict portion is less than 180 degrees, does not influence the cooperation of second butt end 92 and stopper 6 when handle 2 switching-over is the second kind state and uses, and need not also to change the adjustment along with handle 2 with first butt end 91's position, just can realize that handle 2 after changing lifts the locking, can realize very well that handle 2 commutates fast to match the installation of two kinds of direction door bodies that open the door, the practicality is strong.

The utility model discloses a specific embodiment, be equipped with transmission piece 101 on the rear end of driving medium 10, transmission piece 101 and driving medium 10 fixed connection or integrative setting, transmission piece 101 is along the 4 axial extensions of square strip sleeve, be equipped with on the preceding tip of button 6 and supply transmission piece 101 to insert the slot 13 of establishing, slot 13 front end opening, transmission piece 101 insert and establish the circumference synchronous rotation of realizing button 6 and driving medium 10 in slot 13. The button 6 and the transmission piece 10 are simple in structure and convenient to process, and the button 6 and the transmission piece 10 are synchronously rotated through the matching of the transmission block 101 and the slot 13.

The specific embodiment of the utility model, 6 outer walls of button on be equipped with the protruding muscle 14 of second, the corresponding protruding muscle 14 position of second of 21 inner walls of connecting portion is equipped with second draw-in groove 15, the axial extension of second draw-in groove 15 edge square strip sleeve 4, the protruding muscle 14 of second slide and set up and realize the circumference linkage of button 6 and connecting portion 21 and to the direction of 6 edge square strip sleeve 4 axial slip of button in second draw-in groove 15. Simple structure, convenient operation, the protruding muscle 14 of second of button 6 slides and sets up in the second draw-in groove 15 of connecting portion 21, can realize simultaneously that button 6 and connecting portion 21 rotate in step to the week to 6 endwise slip's of button spacing to avoid button 6 to produce the skew when sliding, thereby can't rotate with the cooperation of driving medium 10.

The utility model discloses a concrete embodiment, the extension of driving medium 10 rear end has connecting block 16, and driving block 101 sets up on the 16 outer walls of connecting block, be equipped with the connection chamber 17 that matches with connecting block 16 on the 6 front ends of button, slot 13 is located and connects chamber 17 lateral wall, is equipped with spring-loaded cavity 18 on the connecting block 16, 11 one end of reset spring contradict on connecting chamber 17 diapire, the 11 other end of reset spring contradicts on the 18 diapires in spring-loaded cavity. Connecting block 16 inserts in connecting chamber 17, and in transmission piece 101 inserted slot 13, realize the conflict cooperation of button 6 and driving medium 10, the linkage is convenient, and connects the setting of chamber 17 and spring mounting chamber 18, is convenient for fix a position reset spring 11's installation, makes it block all the time and establishes in connecting chamber 17 and spring mounting chamber 18, does not squint, and reset button 6 effect is better.

Claims (8)

1. A kind of theft-proof door lock, including faceplate and hand grip, the hand grip is rotated and installed on faceplate, rotate and install spacing cover and square strip bush on the faceplate, also install the reset member used for resetting spacing cover and square strip bush on the faceplate, the said hand is equipped with and used for pressing the button, said button and hand grip slide and cooperate axially along the square strip bush, the button and hand grip circumference are linked and set up, press the button and can realize the circumference linkage of hand grip and square strip bush, characterized by that, there is driving sleeve used for realizing the synchronous linkage of spacing cover and hand grip circumference between hand grip and faceplate, the said driving sleeve has stoppers fixedly connected or integrated into one, the said stopper can rotate and set up on the square strip bush, the said square strip bush is equipped with the conflict department which limits the rotation of stopper on one side close to the stopper, the said conflict department sets up around the circumference of square strip bush, the shared angle of the conflict department is less than 180 degrees, the both ends of conflict portion are first conflict end and second conflict end respectively, the handle have two kinds of installation status, when the handle is first installation status, the button does not press down, it can make stopper and first conflict end conflict realize transmission cover and square strip sleeve circumference synchronous rotation to lift on hand the stopper can be rotated to keeping away from first conflict end one side around square strip sleeve, when the handle is second kind of installation status, the button does not press down, lift on hand and can make stopper and second conflict end conflict realize transmission cover and square strip sleeve circumference synchronous rotation, press on hand the stopper can be rotated to keeping away from second conflict end one side around square strip sleeve.

2. The security door lock according to claim 1, wherein the middle of the position-limiting cover is provided with a socket into which the end of the transmission sleeve is inserted, the inner wall of the socket is provided with two insertion blocks which are arranged corresponding to each other, the end of the transmission sleeve is provided with a gap into which the insertion block is inserted, the insertion blocks are inserted into the corresponding gaps to realize the circumferential synchronous linkage of the position-limiting cover and the transmission sleeve, and the position-limiting block is arranged at one end of the transmission sleeve provided with the gap.

3. The security door lock according to claim 2, wherein the outer wall of the transmission sleeve is provided with a first rib, the first rib extends axially along the square sleeve, the inner wall of the handle is provided with a first slot corresponding to the first rib, and the first rib is clamped in the first slot to realize circumferential linkage between the transmission sleeve and the handle.

4. The security door lock according to claim 3, wherein the square bar sleeve comprises a square shaft sleeve and a limiting plate fixedly or integrally arranged on the square shaft sleeve, and the two opposite sides of the limiting plate are respectively provided with a limiting piece which can be abutted against the reset piece to realize the reset of the square shaft sleeve.

5. The security door lock according to any one of claims 1 to 4, wherein the handle comprises a connecting portion and a handle portion, the connecting portion and the handle portion are fixedly connected or integrally disposed, the connecting portion is rotatably mounted on the panel, a driving member and a return spring are disposed between the button and the square bar sleeve, the button is mounted on a rear end portion of the connecting portion, a rear end portion of the button is exposed out of the connecting portion, the driving member is disposed in front of the button, the return spring is disposed between the button and the driving member to drive the button to be separated from the driving member, the button is pressed to enable the button to cooperate with the driving member to realize circumferential synchronous rotation of the button and the driving member, and a fixing member is disposed between the driving member and the square bar.

6. The security door lock according to claim 5, wherein the rear end of the driving member is provided with a driving block, the driving block is fixedly connected with or integrally arranged with the driving member, the driving block extends axially along the square sleeve, the front end of the button is provided with a slot for the driving block to be inserted, the front end of the slot is open, and the driving block is inserted into the slot to realize circumferential synchronous rotation of the button and the driving member.

7. The security door lock according to claim 6, wherein the outer wall of the button is provided with a second rib, the inner wall of the connecting portion is provided with a second engaging groove corresponding to the second rib, the second engaging groove extends along the axial direction of the square-bar sleeve, and the second rib is slidably disposed in the second engaging groove to achieve circumferential linkage between the button and the connecting portion and guide the button to slide along the axial direction of the square-bar sleeve.

8. The security door lock according to claim 7, wherein the rear end of the transmission member extends with a connecting block, the transmission block is disposed on the outer wall of the connecting block, the front end of the button is provided with a connecting cavity matching with the connecting block, the slot is located on the side wall of the connecting cavity, the connecting block is provided with a spring mounting cavity, one end of the return spring abuts against the bottom wall of the connecting cavity, and the other end of the return spring abuts against the bottom wall of the spring mounting cavity.

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