CN210342946U

CN210342946U - Anti-reverse-pushing locking anti-theft lock with inclined bolt

Info

Publication number: CN210342946U
Application number: CN201920966672.6U
Authority: CN
Inventors: 张延增; 曾剑
Original assignee: Zhejiang Buan Lock Co ltd
Current assignee: Zhejiang Buan Lock Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-04-17
Anticipated expiration: 2029-06-25

Abstract

The utility model provides a latch bolt prevents pickproof lock of anti-reverse pushing-type locking belongs to tool to lock technical field. It has solved current latch bolt and can reversely push the scheduling problem of unblanking. The utility model discloses a lock body, oblique tongue pole, reset spring, moving part and activity spring, oblique tongue can stretch out oblique tongue hole and insert in the jack on the door frame, the moving part pastes under activity spring's effect and leans on oblique tongue, be fixed with a guide and push away piece on the moving part, door frame jack department is equipped with the stop part, still be equipped with a locating part on the lock body, the locating part supports the lateral part that leans on at the moving part in the effect of a torsional spring one end down, the in-process of closing the door, oblique tongue draws back to the lock body in and pastes with the moving part all the time and lean on, after closing the door, oblique tongue moves and keeps away from the in-process gradually to the moving part outside under above-mentioned reset spring's effect, the locating part can be to leaning on moving part direction rotation and final blocking on. The utility model has the advantages of can't reverse promotion latch bolt, have higher theftproof nature.

Description

Anti-reverse-pushing locking anti-theft lock with inclined bolt

Technical Field

The utility model belongs to the technical field of the tool to lock, a pickproof lock is related to, concretely relates to anti-pickproof lock of anti-reverse pushing-type locking of oblique tongue.

Background

The structure of a security door lock generally mainly comprises a box-shaped lock body, and a bolt and a latch bolt assembly arranged in the lock body. The anti-theft door is mainly provided with a lock tongue, the latch bolt only has the function of temporarily fixing the door, and the latch bolt can be opened when the outer handle and the inner handle rotate; however, people sometimes forget to lock the door after wearing the door (closing the door), so that the existing outer handles are fixed and immovable, and the latch bolt can also play a role in locking the door; however, the latch bolt only extends out of the lock body under the elastic action of a return spring, and the latch bolt is pushed to compress the return spring to unlock the lock.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned defect that the prior anti-theft lock latch bolt locking exists, and the latch bolt that provides can reliably lock after closing the door, and can't reverse promotion latch bolt, has the anti-theft lock of higher theftproof nature.

The purpose of the utility model can be realized by the following technical proposal:

an anti-reverse-push type locking anti-theft lock with a latch bolt comprises a lock body, a latch bolt rod and a return spring, wherein the latch bolt, the latch bolt rod and the return spring are arranged on the lock body, the latch bolt is movably arranged on the lock body and is fixedly connected with one end of the latch bolt rod, a latch bolt hole for the insertion of the latch bolt is formed in the side part of the lock body, after the door is closed, the latch bolt can extend out of the latch bolt hole and is inserted into a jack on a door frame under the action of the return spring, the anti-theft lock also comprises a moving part and a movable spring which are sleeved on the latch bolt rod, two ends of the movable spring respectively act on the moving part and the latch bolt rod, the moving part is abutted against the latch bolt under the action of the movable spring, a guide push part is further fixed on the moving part, one end of the guide push part is fixedly connected with the moving part, the other end of the guide push part axially extends out of the lock body along the latch bolt rod, an orifice, the stop part is relative with above-mentioned drill way after closing the door, still be equipped with a locating part on the lock body, the locating part rotates and sets up on the lock body, and one end is supported and is leaned on the lateral part of above-mentioned moving part under a torsion spring's effect to the locating part, and the in-process of closing the door, the latch bolt is to the interior retraction of lock body and paste with the moving part all the time and lean on, and after closing the door, the latch bolt moves outside the lock body and keeps away from the moving part in-process gradually under above-mentioned reset spring's effect, and above-mentioned locating part can be rotated and finally keep off on the. When the latch bolt extends out of the latch bolt hole and the moving part is attached to the latch bolt, one end of the limiting part just can be attached to the side part of the moving part, the limiting part has no limiting effect on the latch bolt, and the latch bolt can retract into the lock body; after the door is closed, the guide and push piece cannot extend out of the hole opening due to the limit of the blocking part, the inclined tongue moves outwards, the guide and push piece cannot move outwards, the moving piece cannot reset to the initial position, and a gap is generated between the inclined tongue and the moving piece, so that the end part of the limiting piece loses support, the limiting piece can rotate until leaning against the moving piece under the action of the torsion spring, the end part of the limiting piece is blocked on the retraction path of the inclined tongue, and the inclined tongue cannot move into the lock body, so that the inclined tongue is locked; due to the limit of the limit piece, the latch bolt can not be reversely pushed and retracted, so that the anti-theft device has anti-theft performance.

In the anti-reverse-pushing locking anti-theft lock with the latch bolt, the latch bolt is provided with a guide groove matched with the guide pushing piece, the guide groove extends along the movement direction of the latch bolt, one end of the guide pushing piece is fixedly connected with the moving piece, and the other end of the guide pushing piece is always positioned in the guide groove. The guide pushing piece is limited in the guide groove, so that the guide pushing piece slides along the guide groove, and the moving direction of the guide pushing piece is ensured.

In the above anti-reverse-pushing locking anti-theft lock, the guide groove penetrates through the latch bolt along the movement direction of the latch bolt, and when the movable member abuts against the latch bolt, the extending end of the guide and push member is flush with the extending end of the latch bolt. When the oblique tongue retracts, the guide and push piece and the oblique tongue move synchronously.

In the above anti-reverse-pushing locking anti-theft lock with latch bolt, the guide and push member and the movable member are of an integral structure.

In the anti-reverse-pushing-locking anti-theft lock with the latch bolt, the return spring, the movable part and the latch bolt are sequentially arranged along the extension direction of the latch bolt rod, the latch bolt rod is fixedly provided with the elastic leaning part, and the return spring and the movable spring are respectively arranged at two sides of the elastic leaning part and are elastically leaned against the elastic leaning part.

In the above-mentioned anti-reverse-pushing-locking anti-theft lock with latch bolt, the spring-back portion is annular and is integrated with the latch bolt rod.

In the anti-reverse-pushing locking anti-theft lock with the latch bolt, the movable spring is always in a compressed state, the movable part can be ensured to be tightly attached to the latch bolt, and meanwhile, the elastic force of the movable part during resetting is as large as possible, so that the movable part can be successfully reset.

In the anti-reverse-pushing locking anti-theft lock with the latch bolt, the return spring is always in a compressed state, so that the extending position of the latch bolt is ensured, and meanwhile, the elastic force of the latch bolt during resetting is ensured to be as large as possible, so that the latch bolt can be reset smoothly.

In the anti-reverse-push type locking anti-theft lock with the latch bolt, the lock body is provided with a support, the support is provided with a through hole for the latch bolt rod to penetrate through, one end of the latch bolt rod is provided with a stop part, the outer diameter of the stop part is larger than that of the through hole, the latch bolt is arranged at the other end of the latch bolt rod, the stop part and the latch bolt are always positioned at two sides of the support, and two ends of the return spring respectively lean against the support and the lean against part.

In the anti-reverse-pushing locking anti-theft lock with the latch bolt, the side part of the latch bolt is wider than the side part of the moving part, the side part of the latch bolt is provided with the abdicating groove, the abdicating groove extends along the moving direction of the latch bolt, and the groove bottom of the abdicating groove is flush with the side part of the moving part. The abdicating groove is used for preventing the inclined bolt from interfering with the limiting part when the inclined bolt retracts under the action of external force (when the door is closed), so that the inclined bolt can be ensured to retract smoothly, and the limiting part is always kept still when the inclined bolt retracts into the lock body.

In the above anti-reverse-pushing-locking anti-theft lock with the latch bolt, one end of the limiting member is provided with a protrusion for abutting against the side portion of the movable member, and the protrusion protrudes from one side of the limiting member to the movable member. The raised area is small, and the friction resistance when the latch bolt retracts is reduced.

In the anti-reverse-pushing locking anti-theft lock with the latch bolt, the protrusion is provided with a guide inclined plane, an included angle between the guide inclined plane and the extending direction of the latch bolt is an acute angle, and one side of the front end of the movable part moves in contact with the guide inclined plane when the movable part is reset to lean against the upper latch bolt under the action of the movable spring; the guide inclined plane is beneficial to smoothly pushing the limiting piece away when the movable piece resets, so that the movable piece resets.

In the above anti-reverse-pushing-locking anti-theft lock with latch bolt, the limiting member is located on one side of the latch bolt rod, the limiting member is strip-shaped, the limiting member includes a leaning section and an extending section, the protrusion is arranged at one end of the leaning section, the extending section is connected at the other end of the leaning section, when the limiting member is blocked on a retraction path of the latch bolt, the side portion of the leaning section leans against the side portion of the moving member, and the leaning section is parallel or nearly parallel to the latch bolt rod. The leaning section is parallel or nearly parallel to the oblique tongue rod to limit the oblique tongue, the leaning section props against the oblique tongue through the end part of the front end, when the oblique tongue is pushed reversely, the acting force applied to the leaning section is close to or consistent with the extending direction of the oblique tongue, therefore, the acting force can not enable the oblique tongue to rotate, the leaning section is leaned against the side part of the moving part, the leaning is stable, and the locking reliability of the oblique tongue is guaranteed.

In the above-mentioned anti-reverse-pushing type locking anti-theft lock with the latch bolt, the side of the abutting section abuts against the side surface and the surface of the movable member. The surface-to-surface leaning is beneficial to keeping the limiting part stable, and the retraction limiting of the latch bolt is more reliable.

In the anti-reverse-pushing locking anti-theft lock with the latch bolt, the end part of the abutting section is a plane, and the plane is used for abutting against the latch bolt and is not easy to lose stability.

In the anti-reverse-pushing-locking anti-theft lock with the latch bolt, the extension section comprises a first oblique line section, a first straight line section, a second oblique line section and a second straight line section which are sequentially connected, the first oblique line section is connected with the attaching section and extends from the end of the attaching section along the axial direction of the latch bolt rod and gradually gets away from the center of the latch bolt rod, the second oblique line section extends from the end of the first straight line section along the axial direction of the latch bolt rod and gradually gets close to the center of the latch bolt rod, the first straight line section and the second straight line section are parallel to the attaching section, and the end of the second straight line section is hinged to the lock body.

In the above-mentioned anti-reverse-push type locking anti-theft lock with the latch bolt, the second straight section and the abutting section are in the same straight line.

In foretell anti-theft lock of anti-reverse pushing-type locking of latch bolt, still be equipped with the shifting block that main spring bolt and transmission link to each other with it on the lock body, main spring bolt slides and sets up on above-mentioned lock body, and the spring bolt hole has been seted up to the lock body lateral part, and the shifting block rotates and sets up on the lock body, is equipped with the square hole that is used for wearing to establish the handle square steel on the shifting block, still be equipped with the unlocking piece on the lock body, the unlocking piece links to each other with the shifting block transmission, and the shifting block drives main spring bolt and inwards contracts the in-process to the lock body, drives above-mentioned locating part. When the handle rotates the shifting block to unlock, the limiting piece can be rotated to be far away from the moving piece through the unlocking piece, the locking of the limiting piece on the latch bolt is released, and the latch bolt can retract.

In the anti-reverse-pushing type locking anti-theft lock with the latch bolt, the unlocking piece is sleeved on the latch bolt rod and is positioned between the support and the stop part, one end of the shifting block is arranged between the unlocking piece and the support, the shifting block is rotated during unlocking to push the unlocking piece to move towards the retraction direction of the latch bolt along the axial direction of the latch bolt rod, and the side part of the unlocking piece is attached to the second oblique line section in the moving process. The second oblique line segment is gradually close to the oblique tongue rod along the retraction direction of the oblique tongue, and the unlocking piece is attached to the second oblique line segment, so that the limiting piece can be pushed in the motion process of the unlocking piece.

In the above-mentioned antitheft lock in which the latch bolt prevents reverse-push locking, the latch bolt hole communicates with the above-mentioned orifice.

Compared with the prior art, the utility model locks the latch bolt by adding a limiting piece, the limiting piece can be rotated to unlock the latch bolt, and the latch bolt can not be reversely pushed to rotate the limiting piece, so that the latch bolt can not be retracted, the locking is reliable, and the anti-theft performance is higher; when the latch bolt is locked, the abutting section abuts against the side part of the moving part and is parallel or nearly parallel to the latch bolt rod, so that the stability is good when the latch bolt is stressed, and the locking is more reliable; the unlocking piece is connected with the shifting block in a transmission way, so that the latch bolt can be unlocked when the handle is unlocked, the main lock bolt and the latch bolt are synchronously unlocked, and the unlocking is convenient.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a lock body; 2. a main bolt; 3. a latch bolt; 4. a slanted tongue bar; 5. shifting blocks; 6. a support; 7. a stop part; 8. a return spring; 9. a movable spring; 10. a movable member; 11. a spring-back portion; 12. unlocking the lock; 13. a guiding and pushing piece; 14. a limiting member; 141. a fitting section; 142. a first diagonal segment; 143. a first straight line segment; 144. a second diagonal segment; 145. a second straight line segment; 15. a torsion spring; 16. and (4) protruding.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the utility model provides a pair of anti-pickproof lock of anti-pushing-type locking of latch bolt, including lock body 1 and main spring bolt 2, latch bolt 3 and latch bolt pole 4 of setting on lock body 1, main spring bolt 2 slides and sets up on lock body 1, and the spring bolt hole has been seted up to 1 lateral part of lock body, rotates on the lock body 1 and is equipped with shifting block 5, is equipped with the square hole that is used for wearing to establish the handle square steel on the shifting block 5, and shifting block 5 links to each other with the transmission of main spring bolt 2, rotates shifting block 5 and can open main spring bolt 2.

The lock body 1 is also provided with an oblique tongue hole and a support 6, the oblique tongue 3 is arranged in the oblique tongue hole and is fixedly connected with one end of the oblique tongue rod 4, the support 6 is fixed on the lock body 1, the support 6 is provided with a through hole, the other end of the oblique tongue rod 4 penetrates through the through hole, the end is provided with a stop part 7, the outer diameter of the stop part 7 is larger than that of the through hole, the stop part 7 and the oblique tongue 3 are respectively arranged at two sides of the support 6, and the stop part 7 can prevent the oblique tongue rod 4 from moving outwards to be separated from the support 6; the inclined tongue rod 4 is also movably sleeved with a return spring 8, a movable spring 9 and a movable part 10, the inclined tongue 3, the movable part 10, the movable spring 9, the return spring 8 and the support 6 are sequentially arranged along the axial direction of the inclined tongue rod 4, the inclined tongue rod 4 is also provided with an elastic part 11, the elastic part 11 is annular and is integrally formed with the inclined tongue rod 4, the elastic part 11 is positioned between the return spring 8 and the movable spring 9, two ends of the return spring 8 respectively abut against the support 6 and the elastic part 11, the return spring 8 is always in a compression state, two ends of the movable spring 9 respectively abut against the movable part 10 and the elastic part 11, the movable spring 9 is always in a compression state, and the movable part 10 is tightly attached to the inclined tongue 3 under the action of the movable spring 9; still be equipped with unlocking piece 12 between position-stopping portion 7 and support 6, unlocking piece 12 cover is established on oblique tongue pole 4 and the aperture is less than position-stopping portion 7 external diameter, and the one end card of above-mentioned shifting block 5 is established between unlocking piece 12 and support 6, and clockwise rotation shifting block 5 can drive oblique tongue pole 4 through unlocking piece 12 and remove.

The movable part 10 is also fixed with a guiding and pushing piece 13, the guiding and pushing piece 13 and the movable part 10 are of an integral structure, the guiding and pushing piece 13 is strip-shaped and is positioned at the top of the latch bolt 3, a guide groove matched with the guiding and pushing piece 13 is arranged on the latch bolt 3, the guide groove extends along the movement direction of the latch bolt 3 and penetrates through the latch bolt 3, the left end of the guiding and pushing piece 13 is fixedly connected with the movable part 10, and the right end is always positioned in the guide groove, as shown in the figure, when the movable part 10 is attached to the latch bolt 3, the extending end of the guiding and pushing piece 13 is flush with the extending end of the latch bolt 3, the side part of the lock body 1 is correspondingly provided with an orifice for the guiding and pushing piece 13 to.

In the door closing process, the latch bolt 3 and the guide pushing piece 13 synchronously retract towards the inside of the lock body 1 through contact with a door frame, after the door is closed, the latch bolt 3 extends out of the lock body 1 under the action of the return spring 8 and is inserted into a jack on the door frame, the end part of the right end of the guide pushing piece 13 is abutted against a blocking part at the jack of the door frame and cannot extend out of the lock body 1 to reset, at the moment, the blocking part is opposite to an orifice, and a gap is reserved between the moving piece 10 and the latch bolt 3.

As shown in the figure, one side of the latch bolt rod 4 is further provided with a limiting piece 14, the limiting piece 14 is strip-shaped and bent, the limiting piece 14 extends along the extending direction of the latch bolt rod 4, the limiting piece 14 comprises an integrally formed abutting section 141 and an extending section, the abutting section 141 is located at the right end and close to the latch bolt 3, the abutting section 141 is linear, and the end part of the right end of the abutting section 141 is a plane; the extending section comprises a first oblique line section 142, a first straight line section 143, a second oblique line section 144 and a second straight line section 145 which are connected from right to left in sequence, the first oblique line section 142 is connected with the abutting section 141 and extends from the end of the abutting section 141 to the left and gradually gets away from the center of the latch bolt 4, the second oblique line section 144 extends from the end of the first straight line section 143 to the left and gradually gets close to the center of the latch bolt 4, the first straight line section 143, the second straight line section 145 and the abutting section 141 are parallel, the second straight line section 145 and the abutting end are positioned on the same straight line, the left end of the second straight line section 145 is rotatably arranged on the lock body 1 and is also provided with a torsion spring 15, two ends of the torsion spring 15 respectively act on the second straight line section 145 and the lock body 1, when the unlocking piece 12 moves to the left under the action of the shifting, the side part of the unlocking piece 12 is contacted with the second oblique line segment 144, and the unlocking piece 12 can push the limiting piece 14 outwards because the second oblique line segment 144 is gradually close to the oblique tongue rod 4;

the right end of the abutting section 141 is provided with a bulge 16 protruding towards the moving part 10, as shown in the figure, the latch bolt 3 extends out of the lock body 1 under the action of the return spring 8, the moving part 10 abuts against the latch bolt 3 under the action of the movable spring 9, and under the action of the torsion spring 15, the bulge 16 just abuts against the side part of the moving part 10;

the bulge 16 is also provided with a guide inclined plane which is arranged on the left side of the bulge 16, the guide inclined plane inclines from left to right to be close to the moving part 10, and one side of the front end of the moving part 10 moves in contact with the guide inclined plane when the moving part 10 is reset to be close to the upper latch tongue 3 under the action of the moving spring 9; the guiding inclined plane is beneficial to smoothly pushing the limiting piece 14 away when the moving piece 10 is reset, so that the moving piece is reset;

the two sides of the latch bolt 3 are both wider than the two sides of the movable part 10, in order to enable the latch bolt 3 to retract smoothly without interfering with the limiting part 14, the side part of the latch bolt 3 is provided with a yielding groove, the yielding groove extends along the moving direction of the latch bolt 3, and the groove bottom of the yielding groove is flush with the side part of the movable part 10.

And (3) locking: in the door closing process, the latch bolt 3 and the guiding and pushing element 13 retract synchronously under the action of the door frame, the return spring 8 is compressed, the movable spring 9 and the latch bolt rod 4 move synchronously, after the door is closed, the latch bolt 3 and the latch bolt rod 4 extend synchronously under the action of the return spring 8, the guiding element is compressed by a blocking part on the door frame and does not move in the lock body 1, the movable spring 9 is compressed, a gap is generated between the movable element 10 and the latch bolt 3, after the latch bolt 3 moves outwards to a proper position, the bulge 16 loses a supporting point, the limiting element 14 rotates clockwise to lean against the movable element 10 until the leaning section 141 leans against the side part of the movable element 10, the leaning section 141 leans against the surface of the movable element 10, at the moment, the leaning section 141 is parallel to the latch bolt rod 4, and if the latch bolt 3 is pushed inwards, the latch bolt 3 leans against the end part of the leaning section 141, so that the latch bolt 3 cannot push backwards;

an unlocking process: rotating the inner handle inside the door or unlocking the door with a key, clockwise rotating the shifting block 5, retracting the main bolt 2 into the lock body 1, simultaneously clockwise rotating the shifting block 5 to push the unlocking piece 12 to move towards the retraction direction of the latch bolt 3, the unlocking piece 12 can act on the second latch segment 144 in the moving process to make the limiting piece 14 rotate anticlockwise, thereby relieving the limiting piece 14 from limiting the latch bolt 3, continuing to rotate the shifting block 5, driving the latch bolt 3 to retract through the unlocking piece 12, after the door is opened, because of no limiting of the blocking part, the moving piece 10 leans against the latch bolt 3 under the action of the return spring to return rapidly.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e. in a manner equivalent to "including at least … …", and not in a closed manner, i.e. in a manner not to be interpreted as "including … … only".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An anti-reverse-push type locking anti-theft lock with an oblique tongue comprises a lock body (1), an oblique tongue (3), an oblique tongue rod (4) and a return spring (8), wherein the oblique tongue rod (4) is movably arranged on the lock body (1), the oblique tongue (3) is fixedly connected with one end of the oblique tongue rod (4), an oblique tongue hole for penetrating the oblique tongue (3) is formed in the side part of the lock body (1), after a door is closed, the oblique tongue (3) can extend out of the oblique tongue hole under the action of the return spring (8) and is inserted into a jack on a door frame, and the anti-theft lock is characterized by further comprising a moving part (10) and a movable spring (9) which are sleeved on the oblique tongue rod (4), two ends of the movable spring (9) respectively act on the moving part (10) and the oblique tongue rod (4), the moving part (10) is attached to the oblique tongue (3) under the action of the movable spring (9), and a guide and push piece (13) is further fixed on the moving part (10), one end of the guiding and pushing piece (13) is fixedly connected with the moving piece (10), the other end of the guiding and pushing piece (13) axially extends along the oblique tongue rod (4) and extends out of the lock body (1), a hole for the guiding and pushing piece (13) to movably penetrate is correspondingly formed in the side portion of the lock body (1), a blocking portion for preventing the guiding and pushing piece (13) from extending out of the lock body (1) is arranged at the position of the door frame jack, the blocking portion is opposite to the hole after the door is closed, a limiting piece (14) is further arranged on the lock body (1), the limiting piece (14) is rotatably arranged on the lock body (1), one end of the limiting piece (14) is abutted against the side portion of the moving piece (10) under the action of a torsion spring (15), in the door closing process, the oblique tongue (3) retracts towards the inside of the lock body (1) and is always attached to the moving piece (10), and in the process that the oblique tongue (3) moves towards the outside of the lock body (, the limiting piece (14) can rotate towards the direction of leaning against the upper movable piece (10) under the action of the torsion spring (15) and finally block on the retraction path of the latch bolt (3).

2. The anti-reverse-push type locking anti-theft lock according to claim 1, wherein the latch bolt (3) is provided with a guide groove engaged with the guide-push member (13), the guide groove extends along the moving direction of the latch bolt (3), one end of the guide-push member (13) is fixedly connected with the movable member (10), and the other end is always positioned in the guide groove.

3. An anti-push-back locking antitheft lock according to claim 2, characterized in that the guide slot extends through the latch tongue (3) in the direction of movement of the latch tongue (3), and the protruding end of the guide and push member (13) is flush with the protruding end of the latch tongue (3) when the movable member (10) abuts against the latch tongue (3).

4. The anti-reverse-push-type locking anti-theft lock according to claim 1, wherein the return spring (8), the movable spring (9), the movable member (10) and the latch bolt (3) are sequentially arranged along the extending direction of the latch bolt rod (4), a spring support portion (11) is fixedly arranged on the latch bolt rod (4), the return spring (8) and the movable spring (9) are respectively arranged at two sides of the spring support portion (11) and both spring support portions (11).

5. The anti-reverse-push locking anti-theft lock with the latch bolt according to claim 4 is characterized in that the lock body (1) is provided with a support (6), the support (6) is provided with a through hole for the latch bolt rod (4) to penetrate through, one end of the latch bolt rod (4) is provided with a stop part (7), the outer diameter of the stop part (7) is larger than that of the through hole, the latch bolt (3) is arranged at the other end of the latch bolt rod (4), the stop part (7) and the latch bolt (3) are always positioned at two sides of the support (6), and two ends of the return spring (8) respectively lean against the support (6) and the lean part (11).

6. An anti-reverse-push locking anti-theft lock according to claim 1, characterized in that the side of the latch tongue (3) is wider than the side of the movable member (10), the side of the latch tongue (3) is provided with a relief groove extending in the direction of movement of the latch tongue (3), and the bottom of the relief groove is flush with the side of the movable member (10).

7. An anti-reverse-push type locking anti-theft lock according to claim 1, wherein a protrusion (16) for abutting against a side portion of the movable member (10) is provided at one end of the stopper member (14), and the protrusion (16) protrudes from one side of the stopper member (14) toward the movable member (10).

8. An anti-push-back locking pickproof lock according to any of claims 1 to 7, wherein the retaining member (14) is located on one side of the latch bar (4), the retaining member (14) is strip-shaped, the retaining member (14) comprises an abutting section (141) and an extending section, the protrusion (16) is provided at one end of the abutting section (141), the extending section is connected to the other end of the abutting section (141), when the retaining member (14) abuts on the retraction path of the latch (3), the side of the abutting section (141) abuts on the side of the movable member (10), and the abutting section (141) is parallel or nearly parallel to the latch bar (4).

9. An anti-push-back locking pickproof lock of claim 8, wherein the side of the abutting section (141) abuts the side of the movable element (10) in a face-to-face manner.

10. The anti-reverse-pushing locking anti-theft lock according to any one of claims 1 to 7, wherein the lock body (1) is further provided with a main lock tongue (2) and a shifting block (5) in transmission connection with the main lock tongue (2), the main lock tongue (2) is slidably arranged on the lock body (1), a lock tongue hole is formed in the side portion of the lock body (1), the shifting block (5) is rotatably arranged on the lock body (1), a square hole for penetrating handle square steel is formed in the shifting block (5), the lock body (1) is further provided with an unlocking piece (12), the unlocking piece (12) is in transmission connection with the shifting block (5), and the shifting block (5) drives the main lock tongue (2) to retract into the lock body (1), and the limiting piece (14) is driven to rotate in the direction away from the moving part (10) by the unlocking piece (12).