阅读说明：本技术 防盗锁 (Anti-theft lock ) 是由 周杰 于 2020-08-12 设计创作，主要内容包括：防盗锁,锁栓上设有锁芯卡嵌槽；锁体包括锁体本体、锁芯、锁芯止挡组件；锁体本体设有供钥匙插入的钥匙孔和供锁栓插入的锁栓插孔,钥匙孔的下方设有第一容置槽和第二容置槽,第一容置槽与钥匙孔对应设置,第二容置槽整体横向贯穿第一容置槽；锁芯上设有供锁芯止挡组件穿过的通孔,锁芯止挡组件包括可转动止挡单元,可转动止挡单元的侧壁上设有退芯槽,锁芯止挡组件贯穿通孔可轴向移动地设于第一容置槽内,锁芯可横向滑动地设于第二容置槽内,锁栓插孔设于第二容置槽的一侧或两侧；其中,可转动止挡单元径向转动,使退芯槽朝向或远离锁芯移动的方向,可转动止挡单元轴向移动,使退芯槽远离通孔或位于通孔内。可提高防盗功能,安全级别更高。(The lock cylinder clamping and embedding groove is arranged on the lock bolt of the anti-theft lock; the lock body comprises a lock body, a lock cylinder and a lock cylinder stop component; the lock body is provided with a key hole for inserting a key and a lock bolt jack for inserting a lock bolt, a first accommodating groove and a second accommodating groove are arranged below the key hole, the first accommodating groove is arranged corresponding to the key hole, and the second accommodating groove transversely penetrates through the first accommodating groove; the lock core is provided with a through hole for the lock core stopping component to pass through, the lock core stopping component comprises a rotatable stopping unit, the side wall of the rotatable stopping unit is provided with a core withdrawing groove, the lock core stopping component penetrates through the through hole and is axially movably arranged in the first accommodating groove, the lock core is transversely slidably arranged in the second accommodating groove, and the lock bolt jack is arranged on one side or two sides of the second accommodating groove; the rotatable stopping unit rotates radially to enable the core withdrawing groove to face or be away from the direction of the movement of the lock core, and the rotatable stopping unit moves axially to enable the core withdrawing groove to be away from the through hole or be located in the through hole. The anti-theft function can be improved, and the security level is higher.)

1. Theftproof lock, its characterized in that: comprises a lock bolt, a lock body and a key; the lock bolt is provided with a lock cylinder clamping and embedding groove; the lock body comprises a lock body, a lock cylinder and a lock cylinder stop component; the lock body is provided with a key hole for inserting a key and a lock bolt jack for inserting a lock bolt, a first accommodating groove and a second accommodating groove are arranged below the key hole, the first accommodating groove is arranged corresponding to the key hole, and the second accommodating groove transversely penetrates through the first accommodating groove; the lock core is provided with a through hole for the lock core stopping component to pass through, the lock core stopping component comprises at least one group of rotatable stopping units, the side wall of each rotatable stopping unit is provided with a first core returning groove, the lock core stopping component penetrates through the through hole and is axially movably arranged in the first accommodating groove, the lock core is transversely slidably arranged in the second accommodating groove, and the lock bolt jacks are arranged on one side or two sides of the second accommodating groove so as to be matched with the lock core to be inserted into the lock core clamping and embedding grooves of the lock bolts; the rotatable stopping unit rotates radially to enable the first core withdrawing groove to face or be away from the direction of the movement of the lock core, and the rotatable stopping unit moves axially to enable the first core withdrawing groove to be away from the lock core through hole or be located in the lock core through hole.

2. The anti-theft lock of claim 1, wherein: the key comprises a key seat and a bolt, wherein the bolt is detachably or fixedly connected with the key seat, and when the bolt is inserted into the key hole, the bolt abuts against the lock cylinder stopping component to move, so that the first core withdrawing groove is just positioned in the position of the lock cylinder through hole.

3. The anti-theft lock of claim 1, wherein: the rotatable stopping unit sequentially comprises a rotatable stopping column, a return spring, a rotating piece and a marking plug along the lower part of the key hole; the first core withdrawing groove is formed in the side wall of the rotating retaining column, the marking plug is provided with a middle hole penetrating the marking plug, one end of the rotating piece is connected with the rotating retaining column, the other end of the rotating piece is located in the middle hole, the reset spring is arranged between the rotating piece and the rotating retaining column, and the rotating piece rotates to drive the rotating retaining column to rotate.

4. The anti-theft lock of claim 3, wherein: the rotating piece comprises a guide post, an inserting disc and a rotating portion, the guide post is inserted into the rotating blocking post, the reset spring is sleeved on the guide post, an inserting hole is formed in the inserting disc, a positioning column inserted into the inserting hole is arranged on the marking plug, and the rotating portion is arranged in a middle hole of the marking plug.

5. The anti-theft lock of claim 4, wherein: the rotating part is provided with a concave straight groove; and marking lines are arranged outside the marking plugs and the rotating part.

6. The anti-theft lock of claim 1, wherein: the lock cylinder stopping assembly further comprises a fixed stopping unit, and the fixed stopping unit sequentially comprises a fixed stopping column, a return spring and a fixed plug along the lower part of the key hole; the lateral wall of fixed bumping post is equipped with the second and moves back the core groove, fixed bumping post and fixed end cap are pushed up respectively to return spring's both ends, the lateral wall of fixed bumping post is equipped with spacing arch, corresponds to be equipped with in the first storage tank of fixed backstop unit with the draw-in groove of spacing protruding adaptation to make fixed bumping post radially spacing and the axial can move, thereby make the second move back the core groove and keep away from the lock core through-hole or be located the lock core through-hole.

7. The anti-theft lock of claim 1, wherein: the tail end of the lock core is provided with a mounting groove, a compression spring and a marble are arranged in the mounting groove, one end of the compression spring abuts against the inner wall of the mounting groove, the other end of the compression spring abuts against the marble, and the tail end of the marble touches and abuts against the lock body.

8. The anti-theft lock of claim 1, wherein: the lock cylinder is characterized in that the lock bolt jack is arranged on two sides of the second accommodating groove, the second accommodating groove penetrates through the lock bolt jack on one side, so that one end of the lock cylinder is exposed out of the lock body, a through hole for inserting the lock bolt is formed in one end of the lock cylinder, a first clamping end is arranged in the through hole and faces one side of the lock cylinder clamping groove, a second clamping end is arranged at the other end of the lock cylinder, and the first clamping end and the second clamping end can be inserted into the lock cylinder clamping groove in a matched mode.

9. The anti-theft lock of claim 1, wherein: the lock bolt comprises a U-shaped lock bolt, the lock core clamping embedding grooves are respectively arranged at two ends of the lock bolt, and the opening directions of the lock bolt and the lock core clamping embedding grooves are consistent.

10. The anti-theft lock of claim 1, wherein: the lock core embedding grooves are provided with a plurality of groups which are arranged at intervals.

Technical Field

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

Background

The existing mechanical anti-theft lock basically adopts a key to eject a marble and then rotates to drive a lock tongue to open the anti-theft lock, so that the defect that the lock is easy to open by using a universal key is generally overcome, the real anti-theft function is not realized, and the security level is low.

The invention patent application with publication number CN1563654 discloses a clutch type anti-theft lock, which comprises a lock shell and a lock cylinder arranged in the lock shell, wherein the lock cylinder comprises an inner lock cylinder, an outer lock cylinder is sleeved outside the inner lock cylinder, a clutch groove is formed in the inner end surface of the outer lock cylinder, a clutch inserting plate can be inserted into the clutch groove, a transmission rod is arranged on the clutch inserting plate, the outer end of the transmission rod extends out of the lock shell, and a spring is arranged on the transmission rod in the lock shell. The lock core can be linked with the transmission rod only by the key of the lock, and the lock core and the transmission rod can only be inefficiently rotated in a separated state by the key of the lock, so that a master key can not find a dialing pressure sensing opening fulcrum, technical unlocking tools such as the master key and the like can be effectively prevented, and the lock core has infinite rotation, so that the drilling resistance is excellent, and the lock core still separates from the transmission rod when the lock core sinks by gravity impact. The invention has simple structure, low cost, simple and convenient use and installation and strong adaptability, and can effectively prevent drilling, prying, collision and technical opening.

The invention patent application with publication number CN101538957 discloses a pick-proof, drilling-proof and theft-proof lock core, which is characterized in that an inner core is arranged at the inner bottom end of a shell, a central shaft is arranged at the upper end of the inner core, a convex body is arranged at the top end of the central shaft, a linkage groove is arranged at the bottom end of the central shaft, a connecting sheet is arranged at the upper end of the inner core, a thrust plate is arranged at the upper end of the connecting sheet, an outer core is arranged at the upper end of the thrust plate, a central hole is arranged at the middle part of the outer core, locking bead sheet mounting grooves are arranged at two sides of the central hole, locking bead sheets are arranged in the mounting grooves, springs are arranged at the front ends of the locking bead sheets, the locking bead sheets and the springs are arranged in a cylinder body of the outer core, a rotating groove is arranged at the upper outer side of the outer core, the outer core is arranged and positioned in the shell by the rotating groove, the invention is, the anti-prying, anti-drilling and anti-theft performance is excellent when the anti-prying, anti-drilling and anti-theft device is used in a matched manner.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an anti-theft lock which is strong in anti-opening capacity and high in safety.

In order to achieve the purpose, the invention adopts the following technical scheme:

the anti-theft lock comprises a lock bolt, a lock body and a key; the lock bolt is provided with a lock cylinder clamping and embedding groove; the lock body comprises a lock body, a lock cylinder and a lock cylinder stop component; the lock body is provided with a key hole for inserting a key and a lock bolt jack for inserting a lock bolt, a first accommodating groove and a second accommodating groove are arranged below the key hole, the first accommodating groove is arranged corresponding to the key hole, and the second accommodating groove transversely penetrates through the first accommodating groove; the lock core is provided with a through hole for the lock core stopping component to pass through, the lock core stopping component comprises at least one group of rotatable stopping units, the side wall of each rotatable stopping unit is provided with a first core returning groove, the lock core stopping component penetrates through the through hole and is axially movably arranged in the first accommodating groove, the lock core is transversely slidably arranged in the second accommodating groove, and the lock bolt jacks are arranged on one side or two sides of the second accommodating groove so as to be matched with the lock core to be inserted into the lock core clamping and embedding grooves of the lock bolts; the rotatable stopping unit rotates radially to enable the first core withdrawing groove to face or be away from the direction of the movement of the lock core, and the rotatable stopping unit moves axially to enable the first core withdrawing groove to be away from the lock core through hole or be located in the lock core through hole.

The key comprises a key seat and a bolt, wherein the bolt is detachably or fixedly connected with the key seat, and when the bolt is inserted into the key hole, the bolt abuts against the lock cylinder stopping component to move, so that the first core withdrawing groove is just positioned in the position of the lock cylinder through hole.

The rotatable stopping unit sequentially comprises a rotatable stopping column, a return spring, a rotating piece and a marking plug along the lower part of the key hole; the first core withdrawing groove is formed in the side wall of the rotating retaining column, the marking plug is provided with a middle hole penetrating the marking plug, one end of the rotating piece is connected with the rotating retaining column, the other end of the rotating piece is located in the middle hole, the reset spring is arranged between the rotating piece and the rotating retaining column, and the rotating piece rotates to drive the rotating retaining column to rotate.

The rotating piece comprises a guide post, an inserting disc and a rotating portion, the guide post is inserted into the rotating blocking post, the reset spring is sleeved on the guide post, an inserting hole is formed in the inserting disc, a positioning column inserted into the inserting hole is arranged on the marking plug, and the rotating portion is arranged in a middle hole of the marking plug.

The rotating part is provided with a concave straight groove; and marking lines are arranged outside the marking plugs and the rotating part.

The lock cylinder stopping assembly further comprises a fixed stopping unit, and the fixed stopping unit sequentially comprises a fixed stopping column, a return spring and a fixed plug along the lower part of the key hole; the lateral wall of fixed bumping post is equipped with the second and moves back the core groove, fixed bumping post and fixed end cap are pushed up respectively to return spring's both ends, the lateral wall of fixed bumping post is equipped with spacing arch, corresponds to be equipped with in the first storage tank of fixed backstop unit with the draw-in groove of spacing protruding adaptation to make fixed bumping post radially spacing and the axial can move, thereby make the second move back the core groove and keep away from the lock core through-hole or be located the lock core through-hole.

The tail end of the lock core is provided with a mounting groove, a compression spring and a marble are arranged in the mounting groove, one end of the compression spring abuts against the inner wall of the mounting groove, the other end of the compression spring abuts against the marble, and the tail end of the marble touches and abuts against the lock body.

The lock cylinder is characterized in that the lock bolt jack is arranged on two sides of the second accommodating groove, the second accommodating groove penetrates through the lock bolt jack on one side, so that one end of the lock cylinder is exposed out of the lock body, a through hole for inserting the lock bolt is formed in one end of the lock cylinder, a first clamping end is arranged in the through hole and faces one side of the lock cylinder clamping groove, a second clamping end is arranged at the other end of the lock cylinder, and the first clamping end and the second clamping end can be inserted into the lock cylinder clamping groove in a matched mode.

The lock bolt comprises a U-shaped lock bolt, the lock core clamping embedding grooves are respectively arranged at two ends of the lock bolt, and the opening directions of the lock bolt and the lock core clamping embedding grooves are consistent.

The lock core embedding grooves are provided with a plurality of groups which are arranged at intervals.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1. the distance between the first core withdrawing groove and the end face of the rotary retaining post is different from the distance between the second core withdrawing groove and the end face of the fixed retaining post, and the distance between the second core withdrawing groove and the end face of the fixed retaining post in each group of fixed retaining units is also different, so that the lengths of corresponding bolts on the key are correspondingly different, when unlocking, each bolt seat on the key corresponds to the corresponding rotary retaining post or fixed retaining post, and when the first core withdrawing groove moves towards the lock core, namely when the first core withdrawing groove is in the through hole, the unlocking can be realized, therefore, compared with the traditional anti-theft lock, the anti-theft lock has higher safety,

2. the lock core stopping assembly comprises at least 1 group of rotatable stopping units, the specific number of the rotatable stopping units and the fixed stopping units is not limited, only one group of rotatable stopping units can be set, and the combination of a plurality of groups of rotatable stopping units and a plurality of groups of fixed stopping units can be set, wherein 1 group of rotatable stopping units is equivalent to 1 password, the greater the number of the rotatable stopping units is, the greater the difficulty in unlocking is, and the stronger the anti-theft capability is.

3. According to the invention, the bolts and the key seat are detachably connected, after locking, at least one bolt is replaced by the bolt with different lengths, or the bolt is detached, or the position of the bolt is changed, so that even if a thief obtains a key of the anti-theft lock, the anti-theft lock is difficult to unlock, the anti-unlocking capability is further enhanced, and the safety is improved.

4. After locking, the rotation of rotating the piece drives the rotation bumping post to rotate a certain angle, so that the first core withdrawing groove is far away from the lock core through hole, and the user identifies the position when the rotation bumping post is unlocked and the position after rotation through the marking line, thereby achieving the function of password theft prevention.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the lock body;

FIG. 3 is a schematic cross-sectional view of the lock body;

FIG. 4 is a schematic structural view of the other side of the lock body opposite to the keyhole;

FIG. 5 is a schematic view of a split exploded view of the lock cylinder;

FIG. 6 is a schematic view of the lock cylinder without the installed pins;

FIG. 7 is a schematic view showing the overall structure of the rotatable stopper unit;

FIG. 8 is an exploded view of the rotatable stop unit;

FIG. 9 is a schematic view of the rotating member;

FIG. 10 is a schematic view of a rotary catch;

FIG. 11 is a schematic view of a fixed stop post;

FIG. 12 is a schematic cross-sectional view of the locking mechanism of the anti-theft lock;

fig. 13 is a schematic sectional view of the key-operated anti-theft lock.

Reference numerals:

the lock bolt 1 is clamped in the groove 11;

a key 2, a key seat 21, a plug 22;

the lock body 3, the key hole 31, the lock bolt jack 32, the first accommodating groove 33, the second accommodating groove 34 and the clamping groove 331;

the lock core 4, the through hole 41, the mounting groove 42, the compression spring 43, the marble 44, the via hole 45, the first clamping end 46 and the second clamping end 47;

a rotatable stopping unit 5, a rotatable stopping column 51, a return spring 52, a rotating part 53 and a marking plug 54; a first core removing groove 511 and a hexagonal hole 512; the guide column 531, the plug-in disc 532, the rotating part 533, the plug-in hole 5321, the rotating part mark line 5331 and the straight groove 5332; a middle hole 541, a positioning column 542 and a plug marking line 543;

the fixed stop unit 6, the fixed stop post 61, the return spring 62, the fixed plug 63, the second core-withdrawing groove 611 and the limit protrusion 612.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

The invention is explained by taking a U-shaped lock as an example, as shown in fig. 1, the embodiment comprises a lock bolt 1, a lock body and a key 2;

the lock bolt 1 is a U-shaped lock bolt, lock core clamping and embedding grooves 11 which are arranged at intervals are respectively arranged at two ends of the lock bolt 1, and the opening directions of the lock core clamping and embedding grooves and the lock core clamping and embedding grooves are consistent.

As shown in fig. 2, the lock body includes a lock body 3, a key cylinder 4, and a key cylinder stop assembly, which in this embodiment includes 1 set of rotatable stop units 5 and 5 sets of fixed stop units 6.

As shown in fig. 2 to 6, the lock body 3 is provided with a key hole 31 for inserting the key 2 and a lock bolt insertion hole 32 for inserting the lock bolt 1, a first accommodation groove 33 and a second accommodation groove 34 are provided below the key hole 31, the first accommodation groove 33 is disposed corresponding to the key hole 31, and the second accommodation groove 34 transversely penetrates the first accommodation groove 33; a through hole 41 for the lock cylinder stopping component to pass through is formed in the lock cylinder 4, the lock cylinder stopping component is axially movably arranged in the first accommodating groove 33 by penetrating through the through hole 41, and the lock cylinder 4 is transversely slidably arranged in the second accommodating groove 34;

the lock bolt jack 32 is arranged at two sides of the second accommodating groove 34, the second accommodating groove 34 penetrates through the lock bolt jack 32 at one side, so that one end of the lock cylinder 4 is exposed out of the lock body 3, one end of the lock cylinder 4 is provided with a through hole 45 for inserting the lock bolt 1, a first clamping end 46 is arranged in one side, facing the lock cylinder clamping and embedding groove 11, of the through hole 45, the other end of the lock cylinder 4 is provided with a second clamping end 47, and the first clamping end 46 and the second clamping end 47 can be inserted into the lock cylinder clamping and embedding groove 11 in a matched mode.

As shown in fig. 5 to 6 and 12 to 13, the lock cylinder 4 can slide laterally to realize unlocking as follows: the tail end of the lock core 4 is provided with a mounting groove 42, a compression spring 43 and a marble 44 are arranged in the mounting groove 42, one end of the compression spring 43 props against the inner wall of the mounting groove 42, the other end of the compression spring 43 props against the marble 44, and the tail end of the marble 44 touches and props against the lock body 3; so, expose in the one end of lock core 4 through pressing, make lock core 4 to the direction removal of lock core card caulking groove 11, compression spring 43 is compressed, pellet shot from a slingshot 44 top is supported on lock body 3, first joint end 46 and second joint end 47 joint respectively in lock core card caulking groove 11, when the unblock, lock core 4 is automatic to the direction removal of keeping away from lock core card caulking groove 11 under the effect that compression spring 43 resets, thereby make first joint end 46 and second joint end 47 deviate from in the lock core card caulking groove 11, reach the purpose of unblock.

Referring to fig. 7 to 10, the rotatable stopping unit 5 sequentially includes a rotatable stopping post 51, a return spring 52, a rotating member 53 and a marking plug 54 along a lower portion of the key hole 31; the side wall of the rotary blocking column 51 is provided with a first core withdrawing groove 511, the marking plug 54 is provided with a middle hole 541 penetrating through the marking plug 54, the rotary piece 53 comprises a guide column 531, an insertion disc 532 and a rotary part 533, the guide column 531 is inserted into the hexagonal hole 512 of the rotary blocking column 51, the reset spring 52 is sleeved on the guide column 531, the insertion disc 532 is provided with an insertion hole 5321, the marking plug 54 is provided with a positioning column 542 inserted into the insertion hole 5321, the rotary part 533 is arranged in the middle hole 541 of the marking plug 54, and the rotary part 533 is provided with a concave straight groove 5332; a plug indication line 543 is arranged outside the indication plug 54, and a rotating part indication line 5331 is arranged outside the rotating part 533; the rotating member 53 rotates through the linear groove 5332 to drive the rotating blocking post 51 to rotate, and after the rotating member rotates a certain angle, the positioning post 542 is inserted into the inserting hole 5321 again.

As shown in fig. 2 and 11, the fixed stop unit 6 sequentially includes a fixed stop post 61, a return spring 62, and a fixed plug 63 along a lower portion of the key hole 31; the side wall of the fixed stop post 61 is provided with a second core-removing groove 611, two ends of the return spring 62 respectively support the fixed stop post 61 and the fixed plug 63, the side wall of the fixed stop post 61 is provided with a limit protrusion 612, and a clamping groove 331 adapted to the limit protrusion 612 is provided in the first accommodating groove 33 corresponding to the fixed stop unit 6, so that the fixed stop post 61 is radially limited and axially movable, and the second core-removing groove 611 is far away from the through hole 41 of the lock core 4 or is located in the through hole 41 of the lock core 4.

Referring to fig. 12 to 13, the principle of unlocking the rotary catch 51 and the fixed catch 61 by axial movement is as follows: the rotary blocking column 51 and the fixed blocking column 61 pass through the through hole 41 of the lock cylinder 4 and are mounted at the front end of the first accommodating groove 33, the marking plug 54 and the fixed plug 63 are located at the tail end of the first accommodating groove 33, the rotary blocking column 51 and the fixed blocking column 61 can move axially along the first accommodating groove 33 under the action of the return spring 52 and the return spring 62, so that the first core-removing groove 511 and the second core-removing groove 611 are far away from the through hole 41 or are located in the through hole 41, when the first core-removing groove 511 and the second core-removing groove 611 are far away from the through hole 41, the through hole 41 of the lock cylinder 4 is clamped by the rotary blocking column 51 and the fixed blocking column 61 and cannot slide transversely, and when the first core-removing groove 511 and the second core-removing groove 611 are located in the through hole 41, the through hole 41 of the lock cylinder 4 has a moving space with the first core-removing groove 511 and the second core-removing groove 611.

Referring to fig. 12 to 13 and 7, the principle of radial rotation locking of the rotary catch 51 is as follows: the rotary catch column 51 is different from the fixed catch column 61, and the outer wall of the rotary catch column 51 has no limit protrusion, so that the rotary catch column 51 can radially rotate in the first accommodating groove 33, so that the first core removing groove 511 is far away from the through hole 41 of the lock core 4 or is positioned in the through hole 41 of the lock core 4, when the rotary catch column 51 rotates by a certain angle to make the first core removing groove 511 far away from the through hole 41, the axial movement of the rotary catch column 51 does not make the first core removing groove 511 positioned in the through hole 41, thereby achieving the purpose of locking; in addition, the indicating plug 54 and the rotating portion 533 are provided with indicating lines, so that the user can identify the position of the rotating stopper 51 at the time of unlocking and the position after rotating by the indicating lines.

As shown in fig. 12 to 13, the key 2 includes a key seat 21 and a plug 22, and the plug 22 is detachably or fixedly connected to the key seat 21, wherein when the plug 22 is inserted into the key hole 31, the plug 22 pushes against the rotary catch 51 and the fixed catch 61 to move axially, so that the first core-removing groove 511 and the second core-removing groove 611 are located at positions right in the through hole 41 of the lock core 4, thereby unlocking the lock.

In this embodiment, the distance from the first core-removing groove 511 to the end surface of the rotating retaining column 51 is different from the distance from the second core-removing groove 611 to the end surface of the fixed retaining column 61, and the distances from the second core-removing groove 611 to the end surfaces of the respective fixed retaining columns 61 in the 5 groups of fixed retaining units 6 are also different, so that the lengths of the corresponding bolts 22 on the key 2 are correspondingly different, and each bolt 22 corresponds to a unique rotating retaining column 51 or fixed retaining column 61, so that the first core-removing groove 511 and the second core-removing groove 611 are exactly located on the same axis of the through hole 41, thereby realizing unlocking; if the bolts 22 and the key base 21 are detachably connected and locked, at least one of the bolts 22 is replaced with a bolt 22 having a different length, or the bolt 22 is removed, or the position of the bolt 22 is changed, so that even if a thief obtains the key 2 of the anti-theft lock, it is difficult to unlock the anti-theft lock, thereby further enhancing the anti-unlocking capability and improving the safety.

Referring to fig. 12-13, the working principle and the using method of the invention are as follows:

when the lock is unlocked, the bolts 22 of the key 2 are correspondingly pressed into the key holes 31, so that the bolts 22 press the rotary catch 51 and the fixed catch 61 which are positioned in the first accommodating groove 33, the rotary catch 51 and the fixed catch 61 move axially for a certain distance, and finally the first core-removing groove 511 and the second core-removing groove 611 are positioned in the through hole 41, at the moment, the through hole 41 of the lock core 4, the first core-removing groove 511 and the second core-removing groove 611 have a moving space, the lock core 4 automatically moves towards the direction far away from the lock core clamping groove 11 under the reset action of the compression spring 43, so that the first clamping end 46 and the second clamping end 47 are separated from the lock core clamping groove 11, and the lock bolt 1 can be pulled out of the lock bolt inserting hole 32, thereby achieving the unlocking purpose;

during locking, two ends of the lock bolt 1 are directly inserted into the lock bolt insertion holes 32 of the lock body 3, then the lock core 4 is pushed in by hand, the lock core 4 overcomes the compression spring 43 to move forwards, so that the first clamping end 46 and the second clamping end 47 at two ends of the lock core 4 are embedded into the lock core clamping embedding grooves 11 at two ends of the lock bolt 1, at the moment, the rotary blocking column 51 and the fixed blocking column 61 axially move under the action of the return spring 52 and the return spring 62, so that the first core withdrawing groove 511 and the second core withdrawing groove 611 are far away from the through hole 41, and the lock core 4 is blocked, thereby realizing locking;

after locking, the rotating piece 53 is pressed inwards by matching a screwdriver with the straight groove 5332, so that the inserting disc 532 on the rotating piece 53 is separated from the positioning column 542 on the marking plug 54, then the rotating piece 53 rotates radially to drive the rotating blocking column 51 to rotate for a certain angle, the first core withdrawing groove 511 is far away from the through hole 41 of the lock core 4, after the user loosens his hand, the positioning column 542 on the marking plug 54 is inserted into the inserting hole 5321 of the inserting disc 532, and the user identifies the unlocking position of the rotating blocking column 51 and the rotated position through the marking line, so that the password anti-theft function is achieved.

In the invention, the appearance structures of the lock body 3 and the lock bolt 1 are not limited, and one or two groups of lock core clamping and embedding grooves 11 are arranged on the lock bolt 1, so long as the purpose of the invention is realized; the lock core backstop subassembly includes 1 group at least rotatable backstop unit 5, the specific figure of rotatable backstop unit 5 and fixed backstop unit 6 is not restricted, can only set for a set of rotatable backstop unit 5, also can set up the combination of the rotatable backstop unit 5 of multiunit and the fixed backstop unit 6 of multiunit, 1 group rotatable backstop unit 5 is 1 password in other words, the more the figure of rotatable backstop unit 5, then the degree of difficulty of breaking the unblanking is big more, the theftproof ability is stronger, in addition, the dismantlement or the change of the bolt 22 on the reunion key 2, further strengthen the security of lock body.