CN203308211U

CN203308211U - Coded lock

Info

Publication number: CN203308211U
Application number: CN2013203092519U
Authority: CN
Inventors: 赖秀兴
Original assignee: Dongguan Yifeng Lock Co Ltd
Current assignee: Dongguan Yifeng Lock Co Ltd
Priority date: 2013-05-31
Filing date: 2013-05-31
Publication date: 2013-11-27
Anticipated expiration: 2023-05-31

Abstract

The utility model relates to the technical field of locks, in particular to a coded lock. The coded lock comprises a surface shell and a bottom shell, wherein an accommodating space is formed in the surface shell and the bottom shell; a cover plate, a first lock block, a lock hook, a movable sheet and a locking and unlocking mechanism capable of pushing the movable sheet to move are arranged in the accommodating space; the cover plate is connected with the movable sheet in a sliding manner; the lock hook is hinged to the cover plate; the cover plate is provided with a first sliding chute connected with the first lock block in a sliding manner; the movable sheet is provided with a first straight slope; the first lock block is provided with a second straight slope connected with the first straight slope in a sliding manner; the lock hook is also provided with a baffle butted against the first lock block; a first resetting spring is connected between the first lock block and the cover plate in a resisted manner. Aiming at the problems that the sliding block and the lock hoop are severely abraded due to frequent friction, the service life of an accessory is shortened and the sliding block is easily unclenched from an external lock hole, the utility model provides the coded lock which is simple in structure, longer in service life and higher in safety and using performance.

Description

Coded lock

Technical field

The utility model relates to the lock technology field, espespecially a kind of coded lock.

Background technology

Existing case and bag are arbitrarily opened in order to prevent other people, generally that casing at case and bag is provided with latch hook, case lid is provided with slide fastener, when case lid and casing fastening, slide fastener stretches in described latch hook, and by the latch hook locking zipper, if latch hook does not have release, slide fastener can't be threaded off in latch hook, namely case lid can't be opened.

A kind of bag lock is disclosed in the prior art, comprise latch hook, connecting rod, can with the conflict slide block be connected and can make the automatically reset slide block stage clip of slide block of latch hook, connecting rod and slide block are slidably connected, when blocking, slide block is supported the inner surface of latch hook under the effect of slide block stage clip, slide block and latch hook fasten mutually, now slide block positions the position of latch hook, latch hook can not be rotated freely, when unlocking condition, the motion of lock core drivening rod, connecting rod promotes slide block to a side shifting, thereby the inner surface of slide block and latch hook is broken away from, slide block limits also along with disappearance the position of latch hook, latch hook is free to rotation.Wherein, by the fastening and the folding that separate realize lockset of slide block with latch hook, because causing wearing and tearing, frequent sliding friction accelerates between slide block and latch hook, descend to the application life of part, after long-time the use, between slide block and latch hook, often can lock not dead, thereby whole lockset was lost efficacy; In addition; due to slide block, be arranged at the lower position of lockhole, some undesirables can utilize instrument to promote to slide to a lateral movement from the position of lockhole, and slide block and latch hook are broken away from; increased the risk that coded lock is pried open, user's property also can not get good protection.

Summary of the invention

Slide block and latch hook for coded lock in prior art are accelerated because frequent sliding friction causes wearing and tearing; the problem that part decline in application life and slide block are easily pried open from outside lockhole; the utility model provides a kind of coded lock; it is simple in structure; application life is longer, and safe application performance is higher.

For reaching above purpose, the utility model coded lock mainly by the following technical solutions:

A kind of coded lock, comprise face-piece and drain pan, face-piece is fixedly connected with drain pan, face-piece is provided with the slide fastener jack, the inner spatial accommodation that forms of face-piece and drain pan, described space holds cover plate is installed, the first lock dog, latch hook, activity template and the lock-opening closing mechanism that can promote the activity template motion, cover plate and activity template are slidably connected, latch hook is connected with cover plate hinge, described cover plate is provided with first chute that can be slidably connected with the first lock dog, activity template is provided with the first straight inclined-plane, the first lock dog is provided with the second straight inclined-plane that can be slidably connected with the first straight inclined-plane, latch hook also is provided with the baffle plate that can conflict and be connected with the first lock dog, between the first lock dog and cover plate, butt has the first back-moving spring.

Preferably, described spatial accommodation also is equipped with the second lock dog and another latch hook, another latch hook is connected with cover plate hinge, cover plate is provided with second chute that can be slidably connected with the second lock dog, described activity template is provided with the 3rd straight inclined-plane, the second lock dog is provided with the 4th straight inclined-plane that can be slidably connected with the 3rd straight inclined-plane, and another latch hook is provided with another baffle plate that can conflict and be connected with the second lock dog, and between the second lock dog and cover plate, butt has the second back-moving spring.

Preferably, described lock-opening closing mechanism comprises wheel shaft and pushing block, the wheel shaft outside is arranged with the tune code wheel, wheel shaft is provided with slurcam, adjust butt between code wheel and slurcam that the 3rd back-moving spring is arranged, adjust the code wheel outside to be arranged with cipher wheel, adjust the interior outer face of code wheel to be respectively equipped with the first projection and the second projection, wheel shaft is provided with the 3rd chute that can be slidably connected with the first projection, wheel shaft also be provided with can with the draw-in groove of the first protruding clamping, the 3rd chute and draw-in groove form an intersection, cipher wheel is provided with can be for the slot of the second projection insertion, the slurcam of activity template and wheel shaft is supported pushing block respectively at homonymy, face-piece is respectively equipped with cipher wheel hole and the pushing block hole of accommodating cipher wheel and pushing block.

Preferably, described pushing block is lock core, and described spatial accommodation also is equipped with the lock dog that can rotate with lock core, and lock dog is provided with the 3rd projection that can promote the activity template motion.

Preferably, described wheel shaft is arranged with away from an end of slurcam the tune code block that can support the tune code wheel, described spatial accommodation also is equipped with the tune code switch, adjust code block to be provided with the 5th straight inclined-plane, adjust code switch to be provided with the 6th straight inclined-plane that can be slidably connected with the 5th straight inclined-plane of adjusting code block, face-piece is provided with the tune code switch hole of accommodating tune code switch.

Preferably, described tune code block is provided with screens, adjusts code switch to be respectively equipped with and can be connected in the 4th projection of screens and can support the 5th projection of adjusting code block, adjusts butt between code switch and cover plate that the 4th back-moving spring is arranged.

Preferably, described coded lock comprises bearing pin, and latch hook is connected by pin hinge with cover plate.

Preferably, described bearing pin is provided with reference column, and latch hook and cover plate are supported respectively in the two ends of reference column.

Preferably, described bearing pin is fixedly connected with latch hook, and bearing pin is provided with the 6th projection, and cover plate is provided with the stopper slot that can limit the 6th protruding anglec of rotation.

Preferably, the described bearing pin outside is arranged with torsion spring, and the two ends of torsion spring are fixedly connected with latch hook with cover plate respectively.

The beneficial effect of the utility model coded lock is: by first lock dog that can be connected with the baffle plate conflict on latch hook arranged, when the first lock dog was supported baffle plate, latch hook was in closure state, when the first lock dog separates with baffle plate, latch hook is in open mode, and it is simple in structure, and it is convenient to control; Simultaneously, the first lock dog is conflicted and is connected with baffle plate, has reduced the wearing and tearing that are slidably connected and bring due to employing, the application life of having improved component; In addition, because the first lock dog that can support the baffle plate on latch hook is to be installed on the latch hook below, can prevent effectively that the first lock dog from being pried open from outside, improve the safe application performance of the utility model coded lock.

The accompanying drawing explanation

Fig. 1 is the decomposition texture schematic diagram of the utility model coded lock.

Fig. 2 is the structural representation of the utility model coded lock.

Fig. 3 is the structural representation after the utility model coded lock conceals face-piece and drain pan.

Fig. 4 is the Section View along A-A line in Fig. 3.

Fig. 5 is the structural representation of cover plate.

Fig. 6 is the structural representation of wheel shaft.

Fig. 7 is the structural representation of activity template.

Fig. 8 is the structural representation of bearing pin.

Fig. 9 is the structural representation of the first lock dog.

Figure 10 is the structural representation of the second lock dog.

Figure 11 is the structural representation of adjusting code wheel.

Figure 12 is the structural representation of cipher wheel.

Figure 13 adjusts code switch and the structural representation of adjusting code block to be connected.

The specific embodiment

As Fig. 1 ~ shown in Figure 13, a kind of coded lock, comprise face-piece 1 and drain pan 2, face-piece 1 is fixedly connected with drain pan 2, face-piece 1 is provided with slide fastener jack 104, the inner spatial accommodation that forms of face-piece 1 and drain pan 2, described space holds cover plate 3 is installed, the first lock dog 13, latch hook 22, activity template 4 and the lock-opening closing mechanism that can promote activity template 4 motions, cover plate 3 is slidably connected with activity template 4, concrete, activity template 4 can slidably reciprocate along cover plate 3 under the ordering about of lock-opening closing mechanism, latch hook 22 and cover plate 3 chain connections, latch hook 22 can be with respect to cover plate 3 rotations, when rotating to different positions, latch hook 22 can make latch hook 22 be in respectively two kinds of different states of open and close, described cover plate 3 is provided with can be for the first chute 31 of the first lock dog 13 slips, the first chute 31 limits the sliding scale of the first lock dog 13, the first lock dog 13 can only be slided along the scope of the first chute 31, activity template 4 is provided with the first straight inclined-plane 41, the first lock dog 13 is provided with the second straight inclined-plane 131 that can be slidably connected with the first straight inclined-plane 41, latch hook 22 also is provided with the baffle plate 221 that can conflict and be connected with the first lock dog 13, between the first lock dog 13 and cover plate 3, butt has the first back-moving spring 20, concrete, when closure state, latch hook 22 is supported the first lock dog 13 by the baffle plate 221 arranged on it, thereby the position to latch hook 22 is fixed, and latch hook 22 can not be rotated freely, while unblanking, activity template 4 under the ordering about of lock-opening closing mechanism to a Slideslip, the second straight inclined-plane 131 on the first lock dog 13 cooperatively interacts with the first straight inclined-plane 41 of activity template 4, the first lock dog 13 slides along the first chute 31 under the drive on the first straight inclined-plane 41, when the first lock dog 13 slides into appropriate location, the first lock dog 13 breaks away from the baffle plate 221 on latch hook 22, and the interference of the baffle plate 221 on the first lock dog 13 and latch hook 22 disappears thereupon, and latch hook 22 is free to again rotate to open position, while locking, slide fastener is inserted to slide fastener jack 104 and by latch hook 22 lockings, the first lock dog 13 is back motion under the ordering about of the first back-moving spring 20, the first lock dog 13 again with latch hook 22 on the baffle plate 221 that arranges conflict and be connected, thereby latch hook 22 is locked.By first lock dog 13 that can be connected with baffle plate 221 conflicts on latch hook 22 arranged, when the first lock dog 13 was supported baffle plate 221, latch hook 22 was in closure state, when the first lock dog 13 separates with baffle plate 221, latch hook 22 is in open mode, and it is simple in structure, and it is convenient to control; Simultaneously, the first lock dog 13 is conflicted and is connected with baffle plate 221, has reduced the wearing and tearing that are slidably connected and bring due to employing, the application life of having improved component; In addition, because the first lock dog 13 that can support the baffle plate 221 on latch hook 22 is to be installed on latch hook 22 belows, can prevent effectively that the first lock dog 13 from being pried open from outside, improve the safe application performance of the utility model coded lock.

Described spatial accommodation also is equipped with second lock dog 8 and another latch hook 9, another latch hook 9 and cover plate 3 chain connections, cover plate 3 is provided with second chute 32 that can be slidably connected with the second lock dog 8, described activity template 4 is provided with the 3rd straight inclined-plane 42, the second lock dog 8 is provided with the 4th straight inclined-plane 81 that can be slidably connected with the 3rd straight inclined-plane 42, another latch hook 9 is provided with can have the second back-moving spring 19 with the second lock dog 8 butt between another baffle plate 91, the second lock dogs 8 that be connected and cover plate 3 of conflicting.Operating principle between this another latch hook 9 and the second lock dog 8 is basic identical with the operating principle between latch hook 22 and the first lock dog 13, do not repeat them here, by another latch hook 9 and the second lock dog 8 arranged, latch hook 22 and another latch hook 9 are worked simultaneously, can meet the situation that two latch hooks 22 of some object needs could pin, for the customer provides multiple choices, improved the Practical Performance of the utility model coded lock.

Described lock-opening closing mechanism comprises wheel shaft 5 and pushing block 14, wheel shaft 5 outsides are arranged with adjusts code wheel 6, wheel shaft 5 is provided with slurcam 51, adjust butt between code wheel 6 and slurcam 51 that the 3rd back-moving spring 17 is arranged, adjust code wheel 6 outsides to be arranged with cipher wheel 7, adjust the interior outer face of code wheel 6 to be respectively equipped with first projection the 61 and second projection 62, wheel shaft 5 is provided with the 3rd chute 52 that can be slidably connected with the first projection 61, wheel shaft 5 also be provided with can with the draw-in groove 53 of the first protruding 61 clampings, the 3rd chute 52 forms an intersection 54 with draw-in groove 53, cipher wheel 7 is provided with can be for the slot 71 of the second projection 62 insertions, the slurcam 51 of activity template 4 and wheel shaft 5 is supported pushing block 14 respectively at homonymy, face-piece 1 is respectively equipped with cipher wheel hole 102 and the pushing block hole 101 of accommodating cipher wheel 7 and pushing block 14.Concrete, adjust the second projection 62 of code wheel 6 to insert in the slot 71 of cipher wheel 7, adjust code wheel 6 and cipher wheel 7 to realize mutual circumferentially fixing and can rotate together in the circumferential direction of the circle by the second projection 62 and the slot 71 that arrange, on cipher wheel 7, be provided with numeral, when latch hook 22 is locked, adjust inboard the first projection 61 arranged of code wheel 6 to be positioned at the draw-in groove 53 of wheel shaft 5, wheel shaft 5 is blocked and can not move freely by the first projection 61, while unblanking, by the password rotational password arranged, take turns 7 to tram, now adjust code wheel 6 also with cipher wheel 7, to rotate, adjust inboard the first projection 61 arranged of code wheel 6 to be turned to the intersection 54 of the 3rd chute 52 and draw-in groove 53, the first projection 61 can be slided along the 3rd chute 52, thereby wheel shaft 5 left and right vertically is free to slide, when promoting pushing block 14, wheel shaft 5 slides left with pushing block 14 under the effect of slurcam 51, activity template 4 also slides left under the promotion of pushing block 14 hypomere parts, activity template 4 drives the first lock dog 13 and the second lock dog 8 control latch hooks 22 are unblanked, thereby latch hook 22 is opened, unclamp pushing block 14, slurcam 51 promotes pushing block 14 and back moves under the effect of the 3rd back-moving spring 17, wheel shaft 5 is back motion also, until the first projection 61 on tune code wheel 6 is positioned at the intersection 54 of the 3rd chute 52 and draw-in groove 53, rotational password wheel 7 is to other positions, cipher wheel 7 drives adjusts code wheel 6 to rotate, thus the first projection 61 and draw-in groove 53 clampings, and wheel shaft 5 is locked again.

Described pushing block 14 is lock core, and described spatial accommodation also is equipped with the lock dog 15 that can rotate with lock core, and lock dog 15 is provided with the 3rd projection 152 that can promote activity template 4 motions.Concrete, in the present embodiment, lock dog 15 is provided with the 7th projection 151, lock core be provided with can with another draw-in groove of the 7th protruding 151 clampings, lock dog 15 is by the 7th projection 151 and lock core clamping arranged, lock dog 15 can rotate with lock core.Wherein, lock dog 15 can also be threaded with lock core or, by modes such as screw are connected, can realize lock dog 15 rotates together with lock core function, does not repeat them here.When unblanking, key is inserted and turns lock core, lock core drives lock dog 15 rotations, lock dog 15 forms a cam mechanism by the 3rd projection 152 arranged on it, the 3rd projection 152 promotes activity template 4 and slides left, activity template 4 drives the first lock dog 13 control latch hooks 22 and unblanks, thereby latch hook 22 is opened.By this kind mode, even in the situation that do not have password also can the utility model coded lock be opened by key, effectively to have avoided when forgetting Password, the situation that this coded lock can't be opened, strengthened the Practical Performance of the utility model coded lock.

Simultaneously, can also overlap 16 by a sheathed lock core in the outside of lock core, the lock core cover 16 by arranging, can play a very good protection to lock core 14.

Described wheel shaft 5 is arranged with away from an end of slurcam 51 the tune code block 11 that can support tune code wheel 6, described spatial accommodation also is equipped with adjusts code switch 12, adjust code block 11 to be provided with the 5th straight inclined-plane 111, adjust code switch 12 to be provided with the 6th straight inclined-plane 121 that can be slidably connected with the 5th straight inclined-plane 111 of adjusting code block 11, face-piece 1 is provided with the tune code switch hole 103 of accommodating tune code switch 12.Concrete, press and adjust code switch 12, adjust the 6th straight inclined-plane 121 on code switch 12 to apply a thrust to the right to the 5th straight inclined-plane 111 of adjusting code block 11, this thrust to the right promotes to adjust code block 11 to slide to the right, adjust simultaneously code block 11 also to promote to adjust code wheel 6 to slide to the right, because the upper end of cipher wheel 7 is placed in cipher wheel hole 102, cipher wheel 7 axial restraints, while adjusting code wheel 6 to slide to the right, adjust the slot 71 interior disengaging of the second projection 62 of setting on code wheel 6 from cipher wheel 7, now cipher wheel 7 can circumferentially be rotated again, user's rotational password wheel 7 as required carries out the change of password, then unclamp and adjust code switch 12, adjust code wheel 6 back motion under the effect of the 3rd back-moving spring 17, adjust the second projection 62 on code wheel 6 to insert again in the slot 71 of cipher wheel 7, cipher wheel 7 is fixed again at circumferencial direction, cipher wheel 7 can be rotated together with adjusting code wheel 6.By the tune code switch 12 arranged, can be easily the password of the utility model coded lock be changed, simple in structure, easy to operate.

Described tune code block 11 is provided with screens 112, adjusts code switch 12 to be respectively equipped with and can be connected in the 4th projection 122 of screens 112 and can support the 5th projection 123 of adjusting code block 11, adjusts butt between code switch 12 and cover plate 3 that the 4th back-moving spring 18 is arranged.Concrete, when password of the present utility model is changed, press and adjust code switch 12, adjust code switch 12 to promote to adjust code block 11 to slide to the right, until adjust the 4th projection 122 and screens 112 clampings on code switch 12, after password change completes, again press and adjust code switch 12, adjust code switch 12 to continue down motion, adjust the 5th projection 123 on code switch 12 to support tune code block 11, thereby make to adjust the 4th projection 122 on code switch 12 to break away from from screens 112, unclamp and adjust code switch 12, adjust code switch 12 to upspring smoothly under the effect of the 4th back-moving spring 18.By this kind setting, when password of the present utility model is changed, only need press and adjust code switch 12, the position that can exchange code block 11 positions, and does not need with hand, always according to adjusting code switch 12, to make operation more convenient.

Described coded lock comprises bearing pin 21, and latch hook 22 is with cover plate 3 by bearing pin 21 chain connections, and the bearing pin 21 by arranging, facilitated the processing of component, when single part is damaged, can change at any time simultaneously.

Described bearing pin 21 is provided with reference column 211, latch hook 22 and cover plate 3 are supported respectively in the two ends of reference column 211, by the reference column 211 arranged, can position the position of latch hook 22 on bearing pin 21, make latch hook 22 can be installed on accurately default position, also improve simultaneously the efficiency of assembling when latch hook 22 is installed, strengthened the Practical Performance of the utility model coded lock.

Described bearing pin 21 is fixedly connected with latch hook 22, bearing pin 21 is provided with the 6th projection 212, cover plate 3 is provided with the stopper slot 34 that can limit the 6th protruding 212 anglecs of rotation, concrete, bearing pin 21 and latch hook 22 interference fit, bearing pin 21 can rotate together with latch hook 22, by the stopper slot 34 arranged on cover plate 3, stopper slot 34 restriction the 6th projection 212 rotations in the scope of 0 ~ 90 degree, by stopper slot 34 restriction latch hook 22 rotations in the working range of 0 ~ 90 degree that arrange, reduced latch hook 22 in the insignificant rotation of other directions, latch hook 22 can be rotated to desired location fast when work, strengthened the Practical Performance of the utility model coded lock.

Described bearing pin 21 outsides are arranged with torsion spring 10, the two ends of torsion spring 10 are fixedly connected with latch hook 22 with cover plate 3 respectively, concrete, latch hook 22, can rotate between latch hook 22 and cover plate 3 by bearing pin 21 chain connections mutually with cover plate 3, by the torsion spring 10 of installing, when the first lock dog 13 when baffle plate 221 on latch hook 22 separates, but automatic rotation is to open mode under the effect of torsion spring 10 for latch hook 22, and it is simple in structure, improved the Practical Performance of the utility model coded lock.

Described cover plate 3 is provided with the limited post 33 that can position the position of activity template 4, limited post 33 is provided with locating slot, by on limited post 33, locating slot being set, restraint sheet 4 can only slide by along continuous straight runs, can locate accurately the position of activity template 4, and can lead to the slip of activity template 4, improved the kinematic accuracy of activity template 4.

The above embodiment, it is preferred embodiments of the present utility model, be not to limit the utility model practical range, therefore all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model patent claim.

Claims

1. coded lock, comprise face-piece and drain pan, face-piece is fixedly connected with drain pan, face-piece is provided with the slide fastener jack, the inner spatial accommodation that forms of face-piece and drain pan, described space holds cover plate is installed, the first lock dog, latch hook, activity template and the lock-opening closing mechanism that can promote the activity template motion, cover plate and activity template are slidably connected, latch hook is connected with cover plate hinge, it is characterized in that, described cover plate is provided with first chute that can be slidably connected with the first lock dog, activity template is provided with the first straight inclined-plane, the first lock dog is provided with the second straight inclined-plane that can be slidably connected with the first straight inclined-plane, latch hook also is provided with the baffle plate that can conflict and be connected with the first lock dog, between the first lock dog and cover plate, butt has the first back-moving spring.

2. coded lock as claimed in claim 1, it is characterized in that, described spatial accommodation also is equipped with the second lock dog and another latch hook, another latch hook is connected with cover plate hinge, cover plate is provided with second chute that can be slidably connected with the second lock dog, and described activity template is provided with the 3rd straight inclined-plane, and the second lock dog is provided with the 4th straight inclined-plane that can be slidably connected with the 3rd straight inclined-plane, another latch hook is provided with another baffle plate that can conflict and be connected with the second lock dog, and between the second lock dog and cover plate, butt has the second back-moving spring.

3. coded lock as claimed in claim 1, it is characterized in that, described lock-opening closing mechanism comprises wheel shaft and pushing block, the wheel shaft outside is arranged with the tune code wheel, wheel shaft is provided with slurcam, adjust butt between code wheel and slurcam that the 3rd back-moving spring is arranged, adjust the code wheel outside to be arranged with cipher wheel, adjust the interior outer face of code wheel to be respectively equipped with the first projection and the second projection, wheel shaft is provided with the 3rd chute that can be slidably connected with the first projection, wheel shaft also be provided with can with the draw-in groove of the first protruding clamping, the 3rd chute and draw-in groove form an intersection, cipher wheel is provided with can be for the slot of the second projection insertion, the slurcam of activity template and wheel shaft is supported pushing block respectively at homonymy, face-piece is respectively equipped with cipher wheel hole and the pushing block hole of accommodating cipher wheel and pushing block.

4. coded lock as claimed in claim 3, is characterized in that, described pushing block is lock core, and described spatial accommodation also is equipped with the lock dog that can rotate with lock core, and lock dog is provided with the 3rd projection that can promote the activity template motion.

5. coded lock as claimed in claim 3, it is characterized in that, described wheel shaft is arranged with away from an end of slurcam the tune code block that can support the tune code wheel, described spatial accommodation also is equipped with the tune code switch, adjust code block to be provided with the 5th straight inclined-plane, adjust code switch to be provided with the 6th straight inclined-plane that can be slidably connected with the 5th straight inclined-plane of adjusting code block, face-piece is provided with the tune code switch hole of accommodating tune code switch.

6. coded lock as claimed in claim 4, is characterized in that, described tune code block is provided with screens, adjusts code switch to be respectively equipped with and can be connected in the 4th projection of screens and can support the 5th projection of adjusting code block, adjusts butt between code switch and cover plate that the 4th back-moving spring is arranged.

7. coded lock as claimed in claim 1, is characterized in that, described coded lock comprises bearing pin, and latch hook is connected by pin hinge with cover plate.

8. coded lock as claimed in claim 7, is characterized in that, described bearing pin is provided with reference column, and latch hook and cover plate are supported respectively in the two ends of reference column.

9. coded lock as claimed in claim 7, is characterized in that, described bearing pin is fixedly connected with latch hook, and bearing pin is provided with the 6th projection, and cover plate is provided with the stopper slot that can limit the 6th protruding anglec of rotation.

10. coded lock as claimed in claim 7, is characterized in that, the described bearing pin outside is arranged with torsion spring, and the two ends of torsion spring are fixedly connected with latch hook with cover plate respectively.