CN108691462B - Anti-theft lock - Google Patents

Abstract

The invention discloses an anti-theft lock, which comprises a handle, a nozzle body, a limiting slide block, a lock cylinder and a lock body, wherein one end of the nozzle body is provided with a rotating shaft for connecting the handle, the other end of the nozzle body is provided with a lock cylinder accommodating hole for sleeving the lock cylinder, and the nozzle body is also provided with a limiting sliding groove for accommodating the limiting slide block; the bottom of the limiting slide block is provided with a pair of limiting front foot and a limiting rear foot, and one end of the limiting slide block, which is close to the handle, is also provided with a clamping block; the limiting sliding groove comprises a limiting front groove and a limiting rear groove which are arranged in pairs, the limiting front groove is used for accommodating the limiting front foot, the limiting rear groove is used for accommodating the limiting rear foot, and a clamping groove is further formed in the nozzle body. The anti-theft lock improves the anti-theft capability of the anti-theft lock comprising the handle nozzle, simultaneously effectively protects the structures of the handle, the handle nozzle, the lock cylinder and the like exposed outside the door plate, and is convenient and quick to install.

Description

Anti-theft lock

Technical Field

The invention relates to the technical field of mechanical door locks, in particular to an anti-theft lock.

Background

Currently, commercially available anti-theft locks all comprise an inner handle, an outer handle, an inner panel, an outer panel, a lock cylinder, a lock body structure and the like. The inner handle and the outer handle are respectively sleeved with the lock cylinder, when the anti-theft lock is installed, the lock body structure is firstly embedded into the door plate from the side face of the door plate, then the lock cylinder is inserted into the lock body structure, the lock cylinder is inserted into the inner panel and the outer panel from two sides of the door plate, therefore, the lock body structure, the lock cylinder and the inner panel and the outer panel are assembled together, the inner panel and the outer panel of the inner side and the outer side are fixed on the inner side and the outer side of the door plate through screws, finally, the inner handle and the outer handle are connected to the lock cylinder, and the lock body structure, the lock cylinder, the inner panel and the.

However, the existing anti-theft lock is installed inside and outside separately, namely, the installation of the inner side handle and the inner side panel is performed separately from the installation of the outer side handle and the outer side panel, and finally, the inner side handle and the outer side panel are locked by screws. When stealing, still can be through unscrewing the screw and then demolish outside handle, outside panel from the door outside, and then realize stealing the property or destroy and expose in the outside handle of the door outside, lock structures such as outside panel, can not realize the theftproof mesh well, also can not protect the lock body outside part well. In addition, the anti-theft lock which is fixedly installed by means of a plurality of screws has complex installation process and inconvenient installation.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an anti-theft lock, which comprises the handle mouth, and solves the problems that the fixing mechanisms such as bolts are exposed outside a door plate, the anti-theft capacity is insufficient, the lock body structure outside the door cannot be well protected and the like in the conventional anti-theft lock.

The purpose of the invention is realized by adopting the following technical scheme:

an anti-theft lock comprises a handle, a mouth body, a limiting sliding block, a lock cylinder and a lock body, wherein one end of the mouth body is provided with a rotating shaft for connecting the handle, the other end of the mouth body is provided with a lock cylinder accommodating hole for sleeving the lock cylinder, and the mouth body is also provided with a limiting sliding groove for accommodating the limiting sliding block;

the bottom of the limiting slide block is provided with a pair of limiting front foot and a limiting rear foot, and one end of the limiting slide block close to the handle is also provided with a clamping block; the limiting sliding groove comprises a limiting front groove and a limiting rear groove which are arranged in pair, the limiting front groove is used for containing the limiting front foot, the limiting rear groove is used for containing the limiting rear foot, and a clamping groove is further formed in the nozzle body;

when the lock cylinder is inserted into the lock cylinder accommodating hole, the limiting front pin is accommodated in the limiting front groove, the limiting rear pin is accommodated in the limiting rear groove, the limiting sliding block is embedded into the end limiting groove, and the lock cylinder cannot be pulled out of the lock cylinder accommodating hole; when the lock cylinder is further inserted into the lock cylinder accommodating hole, the clamping block is clamped in the clamping groove, the limiting rear foot is erected between the limiting front groove and the limiting rear groove, the limiting sliding block exits from the end limiting groove, and the lock cylinder can be pulled out of the lock cylinder accommodating hole.

Furthermore, one end of the lock cylinder is provided with a lock cylinder end socket, and the other end of the lock cylinder is provided with a lock cylinder limiting groove;

an end limiting groove is formed in the end head of the lock cylinder, the distance between the paired limiting front legs is larger than the width of the end limiting groove and smaller than the width of the lock cylinder, and the distance between the paired limiting rear legs is larger than the width of the lock cylinder;

when the lock core further inserts lock core accommodation hole, the spacing preceding foot of lock core butt, spacing slider upwards removes to the joint groove concurrently, and joint piece joint is in the joint groove.

Furthermore, the handle comprises a nozzle body accommodating hole for accommodating the nozzle body, the rotating shaft is further sleeved with a return spring, one end, close to the door plate, of the return spring is inserted into the rotating shaft to form a shifting lever, and one end, close to the handle, of the return spring is used for abutting against the handle;

when the lock cylinder is inserted into the lock cylinder accommodating hole, the deflector rod is abutted against one end of the lock cylinder close to the handle; when the lock cylinder exits from the lock cylinder accommodating hole, the reset spring resets and the deflector rod pulls the limiting front foot to one side of the door plate, the clamping block exits from the clamping groove, the limiting front foot is accommodated in the limiting front groove, and the limiting rear foot is accommodated in the limiting rear groove.

Further, the nozzle body containing hole is arranged to drive the nozzle body to rotate when the handle rotates, and the limiting sliding block is also provided with a limiting spring;

when the nozzle body is inserted into the nozzle body accommodating hole, one end of the limiting spring is abutted against the inner wall of the nozzle body accommodating hole, and the other end of the limiting spring is abutted against the limiting sliding block.

Furthermore, the nozzle body and the rotating shaft are both hollow, a first limiting hole with an opening facing the handle is formed in the rotating shaft, a first fixing bolt hole is further formed in the nozzle body accommodating hole, and the opening of the first fixing bolt hole faces the first limiting hole.

Furthermore, a second limiting hole is formed in the nozzle body, the second limiting hole is parallel to the tail end of the handle, a second fixing bolt hole is further formed in the nozzle body accommodating hole, and an opening of the second fixing bolt hole faces the second limiting hole.

The clutch device comprises a clutch outer body, a handle return spring and a clutch inner core, wherein a first lock core hole penetrating through the front end face and the rear end face of the clutch inner core is formed in the clutch inner core;

a clutch inner core accommodating groove is formed in the periphery of the second lock cylinder hole, the clutch outer body extends towards the clutch inner core accommodating groove to form a first limiting block, the top end of the first limiting block extends towards the clutch inner core accommodating groove to form first meshing teeth, the first meshing teeth are arranged in the clutch inner core accommodating groove in a hanging mode, second meshing teeth extend outwards from the clutch inner core in the radial direction, and a second limiting block extends from the second meshing teeth in the axial direction;

when the panel fixing device is assembled, the clutch inner core is embedded into the clutch inner core accommodating groove, the second meshing teeth are clamped with the first meshing teeth, and the two sides of the first limiting block and the two sides of the second limiting block are clamped by the hook-shaped tail ends of the handle return springs in a paired mode.

The clutch outer body is provided with a first U-shaped clamp spring, a first clamp spring hole and a third limiting block are symmetrically arranged on two sides of the clutch outer body, the third limiting block is arranged at one end, close to a panel, of the first clamp spring hole, and correspondingly, a fourth limiting block is symmetrically arranged on the panel;

a second clamp spring hole is also formed in the inner wall of the first clamp spring hole, and the first clamp spring hole is communicated with the second lock cylinder hole through the second clamp spring hole;

fixing rings are arranged at two ends of the first U-shaped clamp spring, fixing pins are arranged at the tail end of each fixing ring, the first U-shaped clamp spring is clamped outside the second lock cylinder hole, the fixing rings are inserted into the first clamp spring hole, one surface of each fixing ring, facing the panel, abuts against a fourth limiting block, and the fixing pins penetrate through the second clamp spring hole and extend into the second lock cylinder hole;

when the panel covers the clutch device, the fixing ring is axially arranged between the third limiting block and the fourth limiting block;

when the handle mouth is arranged in the second lock cylinder hole in a penetrating mode, the fixing feet stretch towards two sides and exit from the second lock cylinder hole, and two end faces of the fixing ring are respectively abutted to the third limiting block and the fourth limiting block.

The safety lock further comprises a safety lock, wherein the safety lock comprises a fixed base, a safety panel and a safety lock cylinder, a fourth lock cylinder hole is formed in the fixed base, a fifth lock cylinder hole is formed in the safety panel, and the fourth lock cylinder hole and the fifth lock cylinder hole are used for penetrating through the safety lock cylinder;

the end face, facing the door plate, of the safety panel is provided with a fixed base accommodating groove, the safety panel is arranged to be rotatable relative to the fixed base when the fixed base is accommodated in the fixed base accommodating groove, the safety panel extends towards the fixed base accommodating groove to form third meshing teeth, and the fixed base is provided with fourth meshing teeth matched with the third meshing teeth;

when the fixed base is accommodated in the fixed base accommodating groove, the third meshing teeth are clamped with the fourth meshing teeth through the rotating panel, and the safety panel is arranged to be non-rotatable relative to the fixed base when the safety lock cylinder penetrates through the fourth lock cylinder hole.

Further, the fourth lock cylinder hole comprises a round hole and a U-shaped hole extending outwards from the round hole, the opening of the U-shaped hole faces the round hole, and the fourth lock cylinder hole is arranged in an axial symmetry shape;

the safety lock panel fixing device further comprises a second U-shaped clamp spring, fixing pins are arranged at two ends of the second U-shaped clamp spring, and correspondingly, a fifth limiting block and a sixth limiting block are arranged in the fixing base accommodating groove;

when the second U-shaped clamp spring is installed, the fifth limiting block abuts against the bottom of the second U-shaped clamp spring, the sixth limiting block abuts against the fixed foot, and the distance between the two sides of the second U-shaped clamp spring is equal to the distance between the two side walls of the U-shaped hole.

Compared with the prior art, the invention has the beneficial effects that:

according to the anti-theft lock, when the lock cylinder is inserted into the lock cylinder accommodating hole, the limiting front pin is accommodated in the limiting front groove, the limiting rear pin is accommodated in the limiting rear groove, the limiting sliding block is embedded into the end limiting groove, and the lock cylinder end cannot be pulled out of the lock cylinder accommodating hole, so that direct connection between the lock cylinder and the handle mouth is realized, and the lock cylinder cannot be pulled out of the handle mouth directly. When the lock core further inserts lock core accommodation hole, the joint piece joint in the joint groove and spacing back foot stand between spacing front slot and spacing back groove, spacing slider withdraws from the end spacing groove, from this, lock core accommodation hole can directly be extracted out to the lock core. The handle is directly connected with the lock cylinder through the handle mouth, and no bolt is exposed outside the door plate, so that the anti-theft capacity of the anti-theft lock comprising the handle mouth is improved, and meanwhile, the structures of the handle, the handle mouth, the lock cylinder and the like exposed outside the door plate are effectively protected, and the installation is convenient and rapid.

Drawings

FIG. 1 is an exploded view of an anti-theft lock in accordance with one embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the limiting slider shown in FIG. 1 (the left and right are different viewing angles);

FIG. 3 is a schematic view of the nozzle body shown in FIG. 1 (with different viewing angles on the left and right);

FIG. 4 is a schematic view of the assembly of the limiting slide block and the nozzle body;

FIG. 5 is an assembly schematic view of a limiting slide block, a nozzle body and a lock cylinder;

3 FIG. 3 6 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 A 3- 3 A 3 of 3 FIG. 3 5 3; 3

3 FIG. 3 7 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 A 3- 3 A 3 of 3 FIG. 3 5 3( 3 with 3 the 3 lock 3 cylinder 3 not 3 shown 3) 3; 3

FIG. 8 is an assembly schematic view of a limiting slide block, a nozzle body and a lock cylinder;

FIG. 9 is a cross-sectional view taken along B-B of FIG. 8 (with the lock cylinder not shown);

FIG. 10 is a schematic view of the lock cylinder;

FIG. 11 is a schematic view of the structure of the handle;

FIG. 12 is a cross-sectional view of a limiting slide, a nozzle body and a lock cylinder;

FIG. 13 is a perspective view of a stop block, a nozzle body and a lock cylinder;

FIG. 14 is a perspective view of a stop block, a nozzle body and a lock cylinder;

FIG. 15 is a perspective view of a stop block, a nozzle body and a lock cylinder;

FIG. 16 is a perspective view of a stop block, a nozzle body and a lock cylinder;

FIG. 17 is an exploded view of the pickproof lock of the present invention;

FIG. 18 is an exploded view of the panel securing device shown in FIG. 17;

FIG. 19 is a cross-sectional view of the panel securing device;

FIG. 20 is an assembly diagram of the clutch outer body and the U-shaped clamp spring;

FIG. 21 is a schematic structural view of a panel;

FIG. 22 is an exploded view of the safety lock;

FIG. 23 is a schematic view of the structure of the security panel of FIG. 22;

FIG. 24 is a schematic view of the mounting base of FIG. 22;

figure 25 is an exploded view of the security lock panel securement device.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present invention, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.

Fig. 1 shows an anti-theft lock according to the present invention. The anti-theft lock comprises a handle mouth, a lock cylinder 3 (a lock body structure sleeved on the lock cylinder 3 is not shown) and a handle 4. The handle nozzle comprises a nozzle body 1 and a limiting slide block 2, wherein a rotating shaft 11 used for being connected with a handle 4 is arranged at the left end of the nozzle body 1, a lock cylinder accommodating hole 12 is formed in the right end of the nozzle body 1, and a limiting slide groove 13 used for accommodating the limiting slide block 2 is further formed in the nozzle body 1. Correspondingly, as shown in fig. 2, the bottom of the limiting slider 2 is provided with two limiting front legs 21 and two limiting rear legs 22, the two limiting front legs 21 and the two limiting rear legs 22 are symmetrically arranged on the front side and the rear side of the limiting slider 2, and the two limiting rear legs 22 are symmetrically arranged on the front side and the rear side of the limiting slider 2. As shown in fig. 3, the limiting sliding groove 13 includes two limiting front grooves 131 and two limiting rear grooves 132, the two limiting front grooves 131 are symmetrically disposed on the front and rear sides of the limiting sliding groove 13, the two limiting rear grooves 132 include two limiting rear grooves 132, and the two limiting rear grooves 132 are symmetrically disposed on the front and rear sides of the limiting sliding groove 13. As shown in fig. 2-3, the right end of the limiting slider 2 (i.e. the end of the limiting slider 2 close to the handle 4 when assembling the anti-theft lock) is further provided with a clamping block 23, and correspondingly, the mouth 1 is further provided with a clamping groove 133 matching with the clamping block 23.

As shown in fig. 4, when assembling the handle nozzle and the lock cylinder 3, the limit slider 2 is first placed in the limit sliding slot 13, and at this time, the limit front leg 21 is received in the limit front slot 131, and the limit rear leg 22 is received in the limit rear slot 132, thereby completing the assembly process of the limit slider 2 and the nozzle body 1. As shown in fig. 5-7, the lock core 3 is inserted into the lock core receiving hole 12, the front limiting leg 21 is received in the front limiting groove 131, the rear limiting leg 22 is received in the rear limiting groove 132, the limiting slide block 2 is inserted into the end limiting groove 311, and the lock core 3 is clamped by the limiting slide block 2 and cannot be pulled out of the lock core receiving hole 12. As shown in fig. 8-9, when the lock cylinder 3 is further inserted into the lock cylinder accommodating hole 12 (i.e. the lock cylinder 3 is further inserted into the lock cylinder accommodating hole 12 leftward), the clamping block 23 is clamped in the clamping groove 133, and the limiting rear leg 22 is erected between the limiting front groove 131 and the limiting rear groove 132 (i.e. the limiting rear leg 22 is erected on a platform between the limiting front groove 131 and the limiting rear groove 132), so that the whole limiting slider 2 is supported from the left and right ends of the limiting slider 2 by the clamping block 23 and the limiting rear leg 22, and the limiting slider 2 is ensured to be in a stable state. At this time, the limit slider 2 exits the end limit groove 311, and the key cylinder 3 can be freely pulled out of the key cylinder accommodating hole 12.

When the handle nozzle is installed, the nozzle body 1 can be inserted into the handle 4 through the rotating shaft 11, so that the handle 4 is fixedly connected with the nozzle body 1 to form the handle 4 comprising the handle nozzle. Then the handle 4 is sleeved on the lock core 3 from the door outer side through the handle mouth, when the handle 4 and the handle mouth touch the door outer side panel, the limiting slide block 2 is embedded into the end limiting groove 311, and the lock core 3 is clamped by the limiting slide block 2 and can not be pulled out of the lock core accommodating hole 12. At this time, the handle and the handle mouth on the outer side of the door cannot be pushed into the inner side of the door continuously, and the lock cylinder 3 cannot be directly pulled out of the handle and the handle mouth, so that the handle 4 and the handle mouth on the outer side of the door are fixed on the door plate without bolts and the like, the anti-theft function of the anti-theft lock comprising the handle mouth is enhanced, and the structures such as the handle 4, the lock cylinder 3 and the panel on the outer side of the door plate can be well protected. When the handle and the handle mouth outside the door need to be disassembled, the handle and other structures on the inner side of the door can be disassembled firstly, the lock cylinder 3 is exposed, the handle 4 and the handle mouth outside the door is propped against and pushes the lock cylinder 3 outwards, the lock cylinder 3 is further inserted into the lock cylinder accommodating hole 12, at the moment, the limiting slide block 2 retreats from the end limiting groove 311, the lock cylinder accommodating hole 12 can be extracted from the lock cylinder 3, the process of disassembling the handle 4 and the handle mouth is completed from the outside, and the assembling and disassembling processes are convenient.

As a preferred embodiment, as shown in fig. 10, the handle nozzle further includes a lock cylinder 3, a lock cylinder head 31 is disposed at the left end of the lock cylinder 3, the lock cylinder head 31 is disposed on the lock cylinder 3, and the left end of the lock cylinder head 31 is flush with the left end of the lock cylinder 3. The lock core end 31 is provided with an end limiting groove 311, the distance between the pair of limiting front feet 21 is larger than the width of the end limiting groove 311 and smaller than the width of the lock core 3, namely the distance between the front and rear limiting front feet 21 is larger than the front and rear width of the end limiting groove 311 but smaller than the front and rear width of the lock core 3 arranged below the lock core end 31, and meanwhile, the distance between the front and rear limiting rear feet 22 is larger than the front and rear width of the lock core 3. From this, lock core end 31 can freely slide between two spacing preceding feet 21 and between two spacing back feet 22, and lock core 3 can only freely slide between two spacing back feet 22, when lock core 3 inserts further and inserts lock core accommodation hole 12, two spacing preceding feet 21 of lock core 3 butt, further with spacing slider 2 lifting, simultaneously, make spacing slider 2 move forward to joint piece 23 joint in joint groove 133, this moment, spacing preceding feet 21's bottom is located on lock core 3, therefore, the restriction of the not restricted position slider 2 of left and right slip lock core 3, can directly extract lock core 3.

In a preferred embodiment, the restraining heel 22 is longer than the restraining forefoot 21.

In a preferred embodiment, the bottom of the position-limiting slider 2 is provided with a first downward inclined surface 24 at the end close to the lock cylinder 3, and the lock cylinder head 31 is provided with a second upward inclined surface 312 at the end close to the handle 4.

In a preferred embodiment, the side surface of the end limiting groove 311 close to the door panel is an upward third inclined surface 313, and the third inclined surface 313 extends from the bottom of the end limiting groove 311 to the lock cylinder 3.

In a preferred embodiment, the key cylinder head 31 and the key cylinder 3 together form a right-angle groove 32, the cross section of the right-angle groove 32 is half U-shaped, and one side (right end) of the right-angle groove 32 close to the door panel is an arc 321.

In a preferred embodiment, the handle 4 includes a nozzle body accommodating hole 41 for accommodating the nozzle body 1, the rotating shaft 11 is further sleeved with a return spring 5, one end of the return spring 5 close to the door panel is inserted into the rotating shaft 11 to form a shift lever 51, and one end of the return spring 5 close to the handle 4 is used for abutting against the handle 4.

In a preferred embodiment, as shown in fig. 11, the nozzle body receiving hole 41 is configured to drive the nozzle body 1 to rotate when the handle 4 is rotated, and the limit slider 2 is further provided with a limit spring 6. In this embodiment, the top of the nozzle body accommodating hole 41 is configured to be planar, and correspondingly, the top of the nozzle body 1 is configured to be planar, when the nozzle body 1 is inserted into the nozzle body accommodating hole 41, since the nozzle body 1 cannot rotate relative to the nozzle body accommodating hole 41, when the handle 4 is rotated, the nozzle body 1 is driven to rotate, and further, the lock cylinder 3 inserted into the lock cylinder accommodating hole 12 is driven to rotate. Be provided with the round hole on the spacing slider 2, spacing spring 6 inserts and is used for butt spacing slider 2 in this round hole, and the corresponding spacing slide that is used for holding spacing spring 6 that is equipped with in the mouth body appearance hole 41, when inserting the mouth body 1 in mouth body appearance hole 41, spacing spring 6 is along the spacing slide gliding in mouth body appearance hole 41, the upper end butt spacing slide's of spacing spring 6 inner wall this moment, spacing spring 6's lower extreme butt spacing slider 2. Through spacing spring 6 both ends butt spacing slider 2 and mouth body appearance hole 41 respectively, can guarantee that spacing slider 2 is in the vertical direction all the time, prevent that spacing slider 2 from inclining and influence the regulation and control process.

In a preferred embodiment, the nozzle 1 and the rotating shaft 11 are both hollow, the rotating shaft 11 is provided with a first stopper hole 111 that opens toward the handle 4, the nozzle housing hole 41 is further provided with a first fixing bolt hole 42, and the first fixing bolt hole 42 opens toward the first stopper hole 111. Therefore, when the anti-theft lock is assembled, a fixing bolt can be inserted into the lock cylinder accommodating hole 12, the fixing bolt penetrates out of the first limiting hole 111 and is screwed into the first fixing bolt hole 42 after entering the mouth body 1, therefore, the handle 4 on the outer side is fixed with the mouth body 1 through the first limiting hole 111 and the first fixing bolt hole 42 which are arranged in the rotating shaft 11, the handle structure with the mouth body 1 is formed, the handle structure with the mouth body 1 is sleeved on the lock cylinder 3 on the door plate, and the installation process of the handle 4 on the outer side of the door plate is completed. The bolt is not exposed to the outside, and the bolt cannot be unscrewed from the outside to disassemble the anti-theft lock, so that the anti-theft function of the anti-theft lock is enhanced.

In a preferred embodiment, the mouth 1 is provided with a second stopper hole 14, and the opening direction of the second stopper hole 14 is parallel to the end of the handle 4. The nozzle body accommodating hole 41 is also provided with a second fixing bolt hole 43, and the opening of the second fixing bolt hole 43 faces the second stopper hole 14. Meanwhile, a lock cylinder limiting groove is arranged on the lock cylinder 3 for limiting. After installing handle 4 in the door outside, carry out handle 4 of door inboard again, can cup joint the lock core 3 with the mouth body 1 earlier on, cup joint the lock core 3 with handle 4 again, and at last, insert and pass second spacing hole 14 from the second fixing bolt hole 43 of handle 4 through fixing bolt, fixing bolt's top embedding lock core spacing groove at last, and from this, the door plant is inboard, couple together handle 4, mouth body 1 and lock core 3 fixed connection through fixing bolt, accomplish this pickproof lock's whole installation process.

The assembly and operation of the anti-theft lock are as follows (fig. 12-15 hide the return spring 5 for easy viewing):

in a first step, the lock body, the lock cylinder 3 and the face plate are mounted to the door panel.

In the second step, the position-limiting sliding block 2 is first placed in the position-limiting sliding groove 13, and at this time, the position-limiting front leg 21 is accommodated in the position-limiting front groove 131, and the position-limiting rear leg 22 is accommodated in the position-limiting rear groove 132. And finishing the assembling process of the limiting slide block 2 and the nozzle body 1.

Secondly, as shown in fig. 12, the lock cylinder 3 is inserted into the lock cylinder accommodating hole 12, the second inclined surface 312 of the lock cylinder end 31 abuts against the first inclined surface 24 of the position-limiting slider 2, at this time, the position-limiting slider 2 is lifted, but the height of the position-limiting slider 2 which is lifted is not high enough to enable the clamping block 23 to be clamped in the clamping groove 133.

Thirdly, as shown in fig. 6, as the lock cylinder 3 continues to move to the left, the second inclined surface 312 sequentially penetrates through the gap between the limiting rear leg 22 and the limiting front leg 21 from the right to the left, the limiting front leg 21 is accommodated in the limiting front groove 131, the limiting rear leg 22 is accommodated in the limiting rear groove 132, the limiting slider 2 is embedded in the end limiting groove 311, and the lock cylinder 3 is clamped by the limiting slider 2 and cannot be pulled out of the lock cylinder accommodating hole 12.

Fourthly, as shown in fig. 13, the lock cylinder 3 further moves towards the left end, the third inclined surface 313 of the lock cylinder end 31 abuts against the first inclined surface 24 of the limit slider 2, the limit slider 2 is lifted preliminarily, and when the top of the lock cylinder 3 abuts against the bottom of the limit slider 2, the limit slider 2 is lifted at the highest point, and at the moment, the height of the limit slider 2 which is lifted is still insufficient to enable the clamping block 23 to be clamped in the clamping groove 133.

Fifthly, as shown in fig. 14 to 15, as the lock cylinder 3 continues to move to the left end, the arc surface 321 of the right-angle groove 32 abuts against the front limiting leg 21, the limiting slider 2 is further lifted to be equal to the height of the clamping groove 133, at this time, the limiting slider 2 moves (moves forwards) to one side of the handle 4, the clamping block 23 is clamped in the clamping groove 133, and meanwhile, the lifted limiting rear leg 22 stands between the front limiting groove 131 and the rear limiting groove 132. At this time, the left end of the key cylinder 3 abuts against the shift lever 51 of the return spring 5, and the return spring 5 at this time is in a normal state.

Sixth, as shown in fig. 16, the return spring 5 is compressed. When the key cylinder 3 moves to the right, the return spring 5 is returned and moves to the right. When the left end of the lock core 3 retreats to the right side of the front limit foot 21, the return spring 5 moves to the right by virtue of the return elasticity and pulls the front limit foot 21 to the right through the shift lever 51, and the slide block 2 returns to the second step, that is, the front limit foot 21 is accommodated in the front limit groove 131, and the rear limit foot 22 is accommodated in the rear limit groove 132. At this time, the end limiting groove 311 has moved rightwards until the limiting rear leg 22 is located at the left side of the limiting rear groove 132, i.e. the limiting slide block 2 cannot be inserted into the end limiting groove 311, and the lock cylinder 3 can be freely pulled out of the lock cylinder accommodating hole 12.

As shown in fig. 17 to 18, the antitheft lock of the present invention further comprises a panel fixing device including a clutch device 71 and a panel 72. The clutch device 71 includes a clutch outer 711, a handle return spring 712, and a clutch inner 713. The surfaces of the clutch outer 711, the handle return spring 712, the clutch inner 713, and the face plate 72 facing the door panel are referred to as door panel surfaces, and the surface facing the handle 4 is referred to as handle surface. The clutch inner 713 is provided with a first lock cylinder hole 7131 penetrating through front and rear end faces (namely a door panel face and a handle face) of the clutch inner 713, the clutch outer 711 is provided with a second lock cylinder hole 7111 penetrating through front and rear end faces (namely a door panel face and a handle face) of the clutch outer 711, the panel 72 is provided with a third lock cylinder hole 721 penetrating through front and rear end faces (namely a door panel face and a handle face) of the panel 72, and the handle return spring 712 comprises paired hook-shaped ends 7121. When the panel fixing device is assembled, the handle return spring 712 is first inserted into the clutch outer body 711, and then the clutch inner 713 is inserted from the outside, so that the handle return spring 712 is sealed in a cavity surrounded by the clutch inner 713 and the clutch outer body 711 to form the clutch device 71, and the panel 72 is covered on the clutch device 71 from right to left to form the panel fixing device. A clutch inner core receiving groove 7112 is formed in the door panel surface of the second lock core hole 7111, and the clutch inner core receiving groove 7112 is formed around the outer circumference of the second lock core hole 7111, so that the handle return spring 712 is conveniently sleeved to the outer side of the second lock core hole 7111 through the recessed clutch inner core receiving groove 7112.

The clutch outer 711 extends into the groove space of the clutch inner container 7112 to form a first stopper 7113. In the present embodiment, the clutch outer 711 at the peripheral portion of the clutch core receiving groove 7112 extends to the groove space of the clutch core receiving groove 7112 to form the first stopper 7113, and in other embodiments, the clutch outer 711 at the inner portion of the clutch core receiving groove 7112 (i.e., the peripheral portion of the second lock core hole 7111) extends to the groove space of the clutch core receiving groove 7112 to form the first stopper 7113, which has the same effect. In this embodiment, the first stoppers 7113 include three first stoppers 7113 arranged at an angle from each other. The top end of the first stopper 7113 extends toward the groove space of the clutch inner core receiving groove 7112 to form a first engaging tooth 7114, the first engaging tooth 7114 is suspended in the clutch inner core receiving groove 7112 (i.e., the handle of the first engaging tooth 7114 faces the groove space of the clutch inner core receiving groove 7112), and accordingly, the clutch inner core 713 extends radially outward to form a second engaging tooth 7132. The second engagement teeth 7132 extend in the axial direction toward the clutch outer body 711 side by a second stopper 7133.

When the clutch device 71 is assembled, the handle return spring 712 may be first inserted into the clutch inner core receiving groove 7112 of the clutch outer body 711, and the handle return spring 712 is simultaneously sleeved on the outer circumference of the second lock core hole 7111, at this time, the hook-shaped ends 7121 are shifted, such that one hook-shaped end 7121 of the pair of hook-shaped ends 7121 hooks one side of the first limit block 7113, and the other hook-shaped end 7121 of the pair of hook-shaped ends 7121 hooks the other side of the first limit block 7113, thereby clamping both sides of the first limit block 7113 through the hook-shaped ends 7121 and playing a role of fixing the handle return spring 712. At this time, one side of the first limit block 7113 abuts against one of the hook-shaped ends 7121, the other hook-shaped end 7121 is shifted to the adjacent first limit block 7113, the clutch inner core 713 is inserted into the clutch inner core receiving groove 7112, the clutch inner core 713 is pushed to rotate to the second engaging teeth 7132 to be engaged with the first engaging teeth 7114 under the action of the reset force of the handle return spring 712, and thus the clutch inner core 713 is inserted into the clutch inner core receiving groove 7112 and the clutch inner core 713 is pivotally connected with the clutch outer body 711. When the handle return spring 712 is returned, the pair of hook ends 7121 simultaneously hooks the first stopper 7113 and the second stopper 7133. When the handle 4 is rotated and the clutch inner core 713 is driven to rotate, the second limiting block 7133 pushes the hook-shaped end 7121 on one side to rotate, and when the hook-shaped end 7121 rotates to the adjacent first limiting block 7113, the hook-shaped end 7121 is blocked by the adjacent first limiting block 7113 and cannot rotate continuously, so that the effect of limiting the handle 4 from rotating excessively is achieved; when the handle 4 is released, the handle return spring 712 is reset and drives the clutch inner 713 to rotate, and the clutch inner 713 drives the handle 4 to reset. According to the panel fixing device, the panel 72 is covered on the clutch device 71, the panel 72 and the clutch device 71 can be bonded, clamped or welded, bolts are not needed in the whole assembly process, after the panel fixing device is installed on a door panel, the clutch device 71 (including bolts on the clutch device 71 and the like) is hidden through the panel 72, only the panel 72 is exposed outside, bolts are not needed in the assembly process, the anti-theft function is good, and meanwhile, the lock body structure can be well protected. In addition, second lock core hole 7111 one end butt clutch inner core 713, second lock core hole 7111 other end butt mouth body 1, second lock core hole 7111 from being close to door plant one end to being close to handle 4 one end enough long enough in order to satisfy second lock core hole 7111 and mouth body 1 and carry out the tight fit and cup joint, prevent to lead to appearing becoming flexible between mouth body 1 (being handle 4) and the second lock core hole 7111 because handle 4 drives mouth body 1 and carries out the lateral moment wrench movement in the use.

As a preferred embodiment, as shown in fig. 18 to 20, a first U-shaped clip spring 73 is further disposed on the handle surface of the panel fixing device, and both ends of the first U-shaped clip spring 73 are provided with semicircular fixing rings 731, and the ends of the fixing rings 731 are provided with fixing legs 732. The first clamp spring hole 7118 and the third limiting block 7119 are symmetrically arranged on two sides of the clutch outer body 711, the third limiting block 7119 is arranged at one end, close to the panel 72, of the first clamp spring hole 7118, and the third limiting block 7119 is opposite to the first clamp spring hole 7118. Correspondingly, the fourth stoppers 722 are symmetrically disposed on the panel 72. The inner wall of the first clamp spring hole 7118 is also provided with a second clamp spring hole 71181, and the first clamp spring hole 7118 is communicated with the second lock cylinder hole 7111 through a second clamp spring hole 71181. The first U-shaped snap spring 73 is clamped outside the second cylinder hole 7111 and the fixing ring 731 thereof is inserted into the first snap spring hole 7118, and the fixing leg 732 passes through the second snap spring hole 71181 and extends into the second cylinder hole 7111. At this time, the third limiting block 7119 abuts against the panel surface of the fixing ring 731, the fixing ring 731 is completely covered by the third limiting block 7119 so as not to block the panel 72 from covering the clutch device 71, and the third limiting block 7119 is used to prevent the fixing ring 731 (i.e., the first U-shaped snap spring 73) from jumping out of the first snap spring hole 7118. When the panel 72 is covered on the clutch device 71, a distance is formed between the fourth limiting block 722 and the third limiting block 7119 in the axial direction, and the distance is greater than the thickness of the fixing ring 731 and is used for accommodating the fixing ring 731. When the nozzle body 1 is inserted into the second lock cylinder hole 7111, the cylindrical nozzle body 1 is inserted into the second lock cylinder hole 7111 and then the fixing feet 732 extending into the second lock cylinder hole 7111 are spread to two sides, so that the fixing ring 731 is moved to the two sides to enable the door panel surface of the fixing ring 731 to abut against the fourth limiting block 722 and the handle surface of the fixing ring 731 to abut against the third limiting block 7119, and therefore, the panel 72 and the clutch device 71 are clamped together through the first U-shaped clamp spring 73, the process of installing the panel 72 not only saves the installation bolt, but also can cover the locking bolt of the clutch device 71 on the panel 72, and the anti-theft performance of the panel fixing device 7 is further enhanced. When the nozzle body 1 is pulled out, the fixing feet 732 extend into the second lock cylinder hole 7111 again and the fixing ring 731 moves towards the second lock cylinder hole 7111 by means of the reset elastic force of the first U-shaped clamp spring 73, the fixing ring 731 is restored to a state of being completely covered by the third limiting block 7119, namely, the door plate surface of the fixing ring 731 is not abutted to the fourth limiting block 722, the panel 72 is disconnected with the clutch device 71, and at this time, the panel 72 can be pulled out of the clutch device 71, so that the panel 72 is detachably connected with the clutch device 71.

The anti-theft lock also comprises a safety lock. As shown in fig. 22, the safety lock includes a safety lock panel fixing device including a fixing base 81 and a panel 82, and a safety lock cylinder 83. The process of installing the safety lock comprises the following three steps: firstly, a fixed base 81 is fixedly arranged on the inner side and the outer side of a door panel, then a safety panel 82 is covered on the fixed base 81, and the safety panel 82 is rotated to enable the safety panel 82 to be clamped with the fixed base 81; secondly, inserting a safety lock cylinder 83 from the inner side of the door panel to the outer side, wherein the safety lock cylinder 83 simultaneously penetrates through a fourth lock cylinder hole and a fifth lock cylinder hole on the inner side of the door panel and a fourth lock cylinder hole and a fifth lock cylinder hole on the outer side of the door panel; thirdly, the fixing bolt is inserted from the door panel latch side, and at this time, the fixing bolt passes through the key cylinder fixing hole 831 and fixes the safety key cylinder 83, thereby completing the safety lock installation process. Because the fixing bolt is inserted into the lock cylinder fixing hole 831 from the door panel lock tongue side and locks the safety lock cylinder 83, the safety lock cylinder 83 cannot axially rotate, and therefore, the safety panel 82 cannot synchronously rotate with the safety lock cylinder 83, and the safety panel 2 and the fixing base 81 keep a clamping state.

As shown in fig. 23 to 24, the security lock panel fixing device includes a fixing base 81 and a security panel 82, a fourth lock cylinder hole 811 is provided on the fixing base 81, a fifth lock cylinder hole 821 is provided on the security panel 82, the fourth lock cylinder hole 811 and the fifth lock cylinder hole 821 have the same shape and are used for passing through the security lock cylinder 83, and the security lock cylinder 83 cannot freely rotate in the fourth lock cylinder hole 811 and the fifth lock cylinder hole 821, that is, the security lock cylinder 83 blocks the security panel 82 from freely rotating. The end surface of the security panel 82 facing the door panel is provided with a fixing base receiving groove 822, and the fixing base receiving groove 822 is used for receiving the fixing base 81 when the security panel 82 covers the fixing base 81. When the fixing base 81 is received in the fixing base receiving groove 822, the safety panel 82 is rotatable relative to the fixing base 81. The safety panel 82 is further provided with a third engaging tooth 823, and the third engaging tooth 823 extends from the safety panel 82 to the fixing base accommodating groove 822 and is suspended in the fixing base accommodating groove 822 (that is, a gap is formed above an end surface of the third engaging tooth 823 facing away from the door panel in the axial direction, and is used for clamping a following fourth engaging tooth 812). Be equipped with on unable adjustment base 81 with the fourth meshing tooth 812 of third meshing tooth 823 matched with, fourth meshing tooth 812 extends outwards along unable adjustment base 81's radial direction and forms, and third meshing tooth 823 staggered distribution is on unable adjustment base storage tank 822's periphery, and it is corresponding with it, and fourth meshing tooth 812 staggered distribution is on unable adjustment base 81's periphery. When the safety lock panel fixing device is installed, the fixing base 81 can be accommodated in the fixing base accommodating groove 822 firstly, the safety panel 82 is rotated in the axial direction to enable the third meshing teeth 823 to be clamped with the fourth meshing teeth 812, at the moment, the fourth lock cylinder hole 811 is opposite to the fifth lock cylinder hole 821 and is used for penetrating the safety lock cylinder 83, when the safety lock cylinder 83 is penetrated in the fourth lock cylinder hole 811 and the fifth lock cylinder hole 821, the safety panel 82 is limited by the blocking effect of the safety lock cylinder 83 and cannot rotate relative to the fixing base 81, and therefore the third meshing teeth 823 are firmly clamped (clamped) with the fourth meshing teeth 812. The installation of insurance panel 82, fixed process need not fix through the bolt, and unable adjustment base 81 protects through insurance panel 82, and insurance panel 82 joint has saved the bolt on unable adjustment base 81 and has carried out the trouble of fixing, has strengthened the theftproof function of this safety lock. Meanwhile, the safety panel 82 protects the fixing base 81 and the safety lock cylinder 83, and can protect the fixing base 81, the safety lock cylinder 83 and other lock body structures. In addition, the installation process of the safety lock panel fixing device is simple and rapid, and the installation and disassembly process of the safety lock panel fixing device is convenient.

As a preferred embodiment, as shown in fig. 25, the fourth key cylinder hole 821 includes a round hole and a U-shaped hole extending downward from the round hole, and the U-shaped hole opens toward the round hole, so that the U-shaped hole and the round hole together form a smooth-contoured fourth key cylinder hole 821 to facilitate the insertion of the safety key cylinder 83 into the fourth key cylinder hole 821. In this embodiment, the symmetry axis of the U-shaped hole passes through the center of the circular hole, and therefore, the fourth key cylinder hole 821 is axially symmetric, so that the surfaces of the fourth key cylinder hole 821 and the safety key cylinder 83 are smooth and convenient to install.

In a preferred embodiment, the securing device further includes a second U-shaped clip spring 84, and the two ends of the second U-shaped clip spring 84 are provided with securing legs 841. Correspondingly, a fifth limiting block 824 and a sixth limiting block 825 are disposed in the fixed base receiving groove 822, and the fifth limiting block 824 and the sixth limiting block 825 are disposed in the fixed base receiving groove 822 and integrally connected with the security panel 82. In this embodiment, the fixing legs 841 include a pair and are symmetrically disposed on two sides of the U-shaped hole, and the sixth limiting block 825 also includes a pair and is symmetrically disposed on two sides of the U-shaped hole. When the second U-shaped clamp spring 84 is installed, the second U-shaped clamp spring 84 is embedded into an area between the fifth limiting block 824 and the sixth limiting block 825, at this time, the fifth limiting block 824 supports against the bottom of the second U-shaped clamp spring 84 from bottom to top, the sixth limiting block 825 supports against the pair of fixing feet 841 from top to bottom, and therefore the second U-shaped clamp spring 84 is fixed in the fixing base accommodating groove 822 through the fifth limiting block 824 and the sixth limiting block 825, and therefore the second U-shaped clamp spring 84 is connected with the security panel 82 through the fifth limiting block 824 and the sixth limiting block 825, and the second U-shaped clamp spring 84 cannot rotate relative to the security panel 82. The distance between the two sides of the second U-shaped clamp spring 84 is equal to the distance between the two side walls of the U-shaped hole. When the safety lock panel fixing device is installed, when the safety lock cylinder 83 is inserted into the fourth lock cylinder hole 821, the U-shaped protruding end of the safety lock cylinder 83 is clamped in the second U-shaped clamp spring 84, and the safety lock cylinder 83 is locked by the bolt and cannot rotate, so that the second U-shaped clamp spring 84 clamped outside the safety lock cylinder 83 cannot rotate, the safety lock cylinder 83 is fixedly connected with the safety panel 82 through the second U-shaped clamp spring 84, and when the safety lock cylinder 83 is locked and cannot rotate, the safety panel 82 cannot rotate, and therefore the safety panel 82 is fixedly covered on the fixing base 81 through the second U-shaped clamp spring 84. In addition, the safety lock cylinder 3 is clamped by the second U-shaped clamp spring 84, and the elasticity of the second U-shaped clamp spring 84 can effectively buffer the external strong force acting on the safety panel 82, so that the long-term fastening connection of the safety panel 82 relative to the safety lock cylinder 83 can be further ensured, and the safety panel 82 is not loosened relative to the safety lock cylinder 83 in the using process.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (9)

1. An anti-theft lock is characterized by comprising a handle, a mouth body, a limiting sliding block, a lock cylinder and a lock body, wherein one end of the mouth body is provided with a rotating shaft for connecting the handle, the other end of the mouth body is provided with a lock cylinder accommodating hole for sleeving the lock cylinder, and the mouth body is also provided with a limiting sliding groove for accommodating the limiting sliding block;

the bottom of the limiting slide block is provided with a pair of limiting front foot and a limiting rear foot, and one end of the limiting slide block, which is close to the handle, is also provided with a clamping block; the limiting sliding groove comprises a limiting front groove and a limiting rear groove which are arranged in pair, the limiting front groove is used for containing the limiting front foot, the limiting rear groove is used for containing the limiting rear foot, and a clamping groove is further formed in the nozzle body; the two limiting front feet and the two limiting rear feet are symmetrically arranged on the front side and the rear side of the limiting sliding block; the two limiting front grooves are symmetrically arranged on the front side and the rear side of the limiting sliding groove, the two limiting rear grooves are symmetrically arranged on the front side and the rear side of the limiting sliding groove;

when the lock cylinder is inserted into the lock cylinder accommodating hole, the limiting front pin is accommodated in the limiting front groove, the limiting rear pin is accommodated in the limiting rear groove, the limiting sliding block is embedded into the end limiting groove, and the lock cylinder cannot be pulled out of the lock cylinder accommodating hole; when the lock cylinder is further inserted into the lock cylinder accommodating hole, the clamping block is clamped in the clamping groove, the limiting rear foot is erected between the limiting front groove and the limiting rear groove, the limiting sliding block exits from the end limiting groove, and the lock cylinder can be pulled out of the lock cylinder accommodating hole; one end of the lock cylinder is provided with a lock cylinder end socket, and the other end of the lock cylinder is provided with a lock cylinder limiting groove;

an end head limiting groove is formed in the end head of the lock cylinder, the distance between the paired limiting front legs is larger than the width of the end head limiting groove and smaller than the width of the lock cylinder, and the distance between the paired limiting rear legs is larger than the width of the lock cylinder;

when the lock core further inserts lock core accommodation hole, the spacing front foot of lock core butt, spacing slider upwards removes to the joint groove concurrently, and joint piece joint is in the joint groove.

2. The anti-theft lock according to claim 1, wherein the handle includes a nozzle body receiving hole for receiving the nozzle body, the rotating shaft is further sleeved with a return spring, one end of the return spring, which is close to the door plate, is inserted into the rotating shaft to form a deflector rod, and one end of the return spring, which is close to the handle, is used for abutting against the handle;

when the lock cylinder is inserted into the lock cylinder accommodating hole, the deflector rod is abutted against one end of the lock cylinder close to the handle; when the lock cylinder exits from the lock cylinder accommodating hole, the reset spring resets and the deflector rod pulls the limiting front foot to one side of the door plate, the clamping block exits from the clamping groove, the limiting front foot is accommodated in the limiting front groove, and the limiting rear foot is accommodated in the limiting rear groove.

3. The anti-theft lock according to claim 2, wherein said nozzle body receiving bore is configured to drive rotation of the nozzle body upon rotation of the handle, said limit slider further having a limit spring disposed thereon;

when the nozzle body is inserted into the nozzle body accommodating hole, one end of the limiting spring is abutted against the inner wall of the nozzle body accommodating hole, and the other end of the limiting spring is abutted against the limiting sliding block.

4. The anti-theft lock according to claim 3, wherein the nozzle body and the rotating shaft are hollow, and the rotating shaft is provided with a first stopper hole opening toward the handle, and the nozzle body receiving hole is further provided with a first fixing bolt hole opening toward the first stopper hole.

5. The anti-theft lock according to claim 4, wherein a second limiting hole is formed in the nozzle body, the second limiting hole is parallel to the handle end, a second fixing bolt hole is further formed in the nozzle body accommodating hole, and the opening of the second fixing bolt hole faces the second limiting hole.

6. The pickproof lock of any of claims 1-5, further comprising a clutch device and a face plate, wherein the clutch device comprises a clutch outer body, a handle return spring and a clutch inner core, the clutch inner core is provided with a first lock core hole penetrating through front and rear end faces of the clutch inner core, the clutch outer body is provided with a second lock core hole penetrating through front and rear end faces of the clutch outer body, the face plate is provided with a third lock core hole penetrating through front and rear end faces of the face plate, the handle return spring comprises a pair of hooked ends, and the face plate covers the clutch device;

a clutch inner core accommodating groove is formed in the periphery of the second lock cylinder hole, the clutch outer body extends towards the clutch inner core accommodating groove to form a first limiting block, the top end of the first limiting block extends towards the clutch inner core accommodating groove to form a first meshing tooth, the first meshing tooth is arranged in the clutch inner core accommodating groove in a hanging mode, a second meshing tooth extends out of the clutch inner core along the radial direction, and a second limiting block extends out of the second meshing tooth along the axial direction;

when the panel fixing device is assembled, the clutch inner core is embedded into the clutch inner core accommodating groove, the second meshing teeth are clamped with the first meshing teeth, and the two sides of the first limiting block and the two sides of the second limiting block are clamped by the hook-shaped tail ends of the handle return springs in a paired mode.

7. The anti-theft lock according to claim 6, further comprising a first U-shaped clamp spring, wherein a first clamp spring hole and a third limiting block are symmetrically arranged on two sides of the clutch outer body, the third limiting block is arranged at one end of the first clamp spring hole close to the panel, and correspondingly, a fourth limiting block is symmetrically arranged on the panel;

a second clamp spring hole is also formed in the inner wall of the first clamp spring hole, and the first clamp spring hole is communicated with the second lock cylinder hole through the second clamp spring hole;

fixing rings are arranged at two ends of the first U-shaped clamp spring, fixing feet are arranged at the tail end of each fixing ring, the first U-shaped clamp spring is clamped outside the second lock cylinder hole, the fixing rings are inserted into the first clamp spring hole, one surface, facing the panel, of each fixing ring abuts against a fourth limiting block, and the fixing feet penetrate through the second clamp spring hole and extend into the second lock cylinder hole;

when the panel covers the clutch device, the fixing ring is axially arranged between the third limiting block and the fourth limiting block;

when the handle mouth is arranged in the second lock cylinder hole in a penetrating mode, the fixing feet stretch towards two sides and exit from the second lock cylinder hole, and two end faces of the fixing ring are respectively abutted to the third limiting block and the fourth limiting block.

8. The anti-theft lock according to any one of claims 1 to 5, further comprising a safety lock, wherein the safety lock comprises a safety lock panel fixing device and a safety lock cylinder, wherein the safety lock panel fixing device comprises a fixing base and a safety panel, a fourth lock cylinder hole is formed in the fixing base, a fifth lock cylinder hole is formed in the safety panel, and the fourth lock cylinder hole and the fifth lock cylinder hole are used for penetrating through the safety lock cylinder;

the end face, facing the door plate, of the safety panel is provided with a fixed base accommodating groove, the safety panel is arranged to be rotatable relative to the fixed base when the fixed base is accommodated in the fixed base accommodating groove, the safety panel extends towards the fixed base accommodating groove to form third meshing teeth, and the fixed base is provided with fourth meshing teeth matched with the third meshing teeth;

when the fixed base is accommodated in the fixed base accommodating groove, the third meshing teeth are clamped with the fourth meshing teeth through the rotating panel, and the safety panel is arranged to be non-rotatable relative to the fixed base when the safety lock cylinder penetrates through the fourth lock cylinder hole.

9. The pickproof lock of claim 8, wherein the fourth cylinder bore includes a circular bore and a U-shaped bore extending outwardly from the circular bore, the U-shaped bore opening to the circular bore, the fourth cylinder bore being arranged in axial symmetry;

the safety lock panel fixing device further comprises a second U-shaped clamp spring, fixing pins are arranged at two ends of the second U-shaped clamp spring, and correspondingly, a fifth limiting block and a sixth limiting block are arranged in the fixing base accommodating groove;

when the second U-shaped clamp spring is installed, the fifth limiting block abuts against the bottom of the second U-shaped clamp spring, the sixth limiting block abuts against the fixed foot, and the distance between the two sides of the second U-shaped clamp spring is equal to the distance between the two side walls of the U-shaped hole.

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