CN110130730B

CN110130730B - Unlocking method of magnetic coded master-slave lock

Info

Publication number: CN110130730B
Application number: CN201910415608.3A
Authority: CN
Inventors: 胡振云
Original assignee: Lu'an Yongzhen Grizzly Electrical And Mechanical Technology Co ltd
Current assignee: LU'AN YONGZHEN GRIZZLY ELECTRICAL AND MECHANICAL TECHNOLOGY Co.,Ltd.
Priority date: 2019-05-18
Filing date: 2019-05-18
Publication date: 2020-11-24
Anticipated expiration: 2039-05-18
Also published as: CN110130730A

Abstract

The invention provides an unlocking method of a magnetic coded primary-secondary lock, which comprises the following steps: a user firstly inserts a master key into the first inner lock cylinder body, the saw-toothed protrusions on the master key cylinder push the protruded marbles back and completely place the marbles in the first inner lock cylinder body/outer lock cylinder body, and the marbles remove the rotational constraint between the first inner lock cylinder body and the outer lock cylinder body; then, the user rotates the handle, the first inner lock cylinder barrel synchronously rotates and enables the constraint component to remove the constraint on the sub-key, and the sub-key is switched to the extending state from the retracting state and is inserted into the second inner lock cylinder barrel; then, the sub-key enables the limiting mechanism to remove the constraint between the outer lock cylinder body and the second inner lock cylinder body through magnetic attraction/repulsion, the handle is further rotated, the second inner lock cylinder body rotates and drives the shifting sheet to synchronously rotate, and the shifting sheet enables the lock tongue to retract and be separated from the door frame through the linkage piece; finally, the handle is rotated reversely and pulled out, and the user manually presses and retracts the sub key cylinder into the main key cylinder.

Description

Unlocking method of magnetic coded master-slave lock

Technical Field

The invention relates to the technical field of anti-theft locks, in particular to an unlocking method of a magnetic coded primary-secondary lock.

Background

The anti-theft lock is a common anti-theft tool in daily life and is widely applied to gates, safes and safes, the common anti-theft lock limits the rotatable inner lock cylinder and the fixed outer lock cylinder through marbles with different lengths, the marbles are completely arranged in the inner lock cylinder/the outer lock cylinder only through a key matched with the marbles, the inner lock cylinder can be driven by the key to rotate, the inner lock cylinder rotates to drive the shifting piece to rotate, the shifting piece enables the lock tongue to retract through the linkage piece and is separated from the door frame, the coded anti-theft lock is carried out through different lengths of the marbles protruding into the inner lock cylinder, and the anti-theft performance is common.

In recent years, a face unlocking intelligent anti-theft lock, a fingerprint unlocking intelligent anti-theft lock and the like appear, but the intelligent anti-theft lock is complex in structure, complex in principle, high in production cost and difficult to popularize and apply to thousands of households, and therefore the invention relates to an unlocking method of a magnetic coded primary-secondary lock, which is ingenious in structure, simple in principle, strong in anti-theft performance, diversified in coding, low in production cost and convenient to popularize and apply.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide the unlocking method of the magnetic coded primary and secondary lock, which has the advantages of ingenious structure, simple principle, strong anti-theft performance, diversified codes, low production cost and convenient popularization and application.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

An unlocking method of a magnetic coded primary-secondary lock comprises the following steps:

firstly, unlocking a master lock;

s1: a user firstly inserts a master key into the first inner lock cylinder body, the sawtooth-shaped protrusions on the master key cylinder push the protruded marbles back and completely place the marbles in the first inner lock cylinder body/outer lock cylinder body, and at the moment, the marbles remove the rotation constraint between the first inner lock cylinder body and the outer lock cylinder body;

the lock core body comprises a columnar outer lock core cylinder body with openings at two ends, a first inner lock core cylinder body and a second inner lock core cylinder body which are coaxially arranged in the outer lock core cylinder body, the first inner lock core cylinder body and the second inner lock core cylinder body are both of ring body structures with openings at two ends, one end of the outer lock core cylinder body is an outer end, the other end of the outer lock core cylinder body is an inner end, the first inner lock core cylinder body is arranged close to the outer end of the first inner lock core cylinder body, the second inner lock core cylinder body is arranged close to the inner end of the second inner lock core cylinder body, balls for restricting rotation are arranged between the first inner lock core cylinder body and the outer lock core cylinder body and jointly form a master lock, a limiting mechanism for restricting rotation is arranged between the second inner lock core cylinder body and the outer lock core cylinder body and jointly form a sub lock, the key body comprises a handle, a master key, the primary key is coaxially sleeved outside the secondary key, the secondary key is set to be in a retracted state and an extended state which can be switched mutually, and the primary state restraining member restrains the secondary key to be in the retracted state;

the pin tumbler between the master key and the master lock protrudes into the first inner lock cylinder body, the protruding lengths of different pin tumblers are different, the master key comprises a master key cylinder fixedly connected with a sun handle, the outer circular surface of the master key cylinder is provided with a saw-toothed bulge matched with the pin tumbler, and the matched unlocking between the master key and the master lock is the same as that in the prior art;

(II) extending the sub-key;

s2: a user rotates the handle, the first inner lock cylinder barrel synchronously rotates and enables the constraint component to release the constraint on the sub-key, and the sub-key is switched from a retraction state to an extension state and is inserted into the second inner lock cylinder barrel;

the secondary key comprises a secondary key column which forms sliding guide fit with the primary key cylinder along the axial direction of the primary key cylinder, the length of the secondary key column extending out of the primary key cylinder and the diameter of the secondary key column are matched with the second inner lock cylinder body, one end of the secondary key column close to the handle is coaxially provided with a sleeving groove, the middle position of the sleeving groove along the groove depth direction is coaxially provided with a second built-in step, the second built-in step extends to penetrate through the handle, the diameter of the second built-in step is larger than that of the sleeving groove, a guide rod fixedly connected with the handle is arranged in the sleeving groove, the secondary key column and the guide rod form sliding guide fit along the axial direction of the guide rod, a firing spring is movably sleeved outside the guide rod, one end of the firing spring is abutted against the second built-in step, the other end of the firing spring is;

an external step is arranged at one end, close to the handle, of the sub key column, an internal step III matched with the external step is arranged at one end, away from the handle, of the master key cylinder, and the external step and the internal step are mutually matched to restrict the sliding stroke of the sub key along the master key cylinder;

the master key and the master lock are matched and rotated in a matching mode and the slave key is switched to an extending state, the process is that the master key is inserted into the first inner lock cylinder body, the master key cylinder removes the rotational constraint of the marble between the outer lock cylinder body and the first inner lock cylinder body, the handle is rotated clockwise at the moment to drive the first inner lock cylinder body to rotate synchronously, the first inner lock cylinder body drives the sliding block to rotate synchronously, the sliding block drives the guide protrusion to rotate synchronously, the guide protrusion slides along the triggering section of the guide groove, the guide groove is matched with the guide protrusion to enable the two sliding blocks to slide close to each other along the radial direction of the first inner lock cylinder body, the sliding block is inserted into the constraint hole and pushes against the constraint block, the constraint block retracts into the installation groove under the elastic action of the constraint spring, the constraint component removes the constraint on the slave key column, and at the moment, the trigger spring pushes the slave key column to slide towards the outside, the sub-key is switched to the extended state and inserted into the second inner cylinder barrel;

(III) unlocking the sub-lock;

s3: the sub-key enables the limiting mechanism to remove the constraint between the outer lock cylinder body and the second inner lock cylinder body through magnetic attraction/repulsion, the handle is further rotated, the second inner lock cylinder body rotates and drives the shifting sheet to synchronously rotate, and the shifting sheet enables the lock tongue to retract and be separated from the door frame through the linkage piece;

the limiting mechanism comprises a first limiting hole and a second limiting hole which are arranged outside the outer lock cylinder body and penetrate into the outer lock cylinder body, the axial directions of the first limiting hole and the second limiting hole are parallel to each other and are parallel to the radial direction of the outer lock cylinder body, the limiting mechanism also comprises a third limiting hole and a fourth limiting hole which are arranged outside the second inner lock cylinder body and penetrate into the second inner lock cylinder body, the axial directions of the third limiting hole and the fourth limiting hole are parallel to each other and are parallel to the radial direction of the second inner lock cylinder body, one ends of the third limiting hole and the fourth limiting hole, which are close to the inner part of the second inner lock cylinder body, are provided with a first built-in step, the first limiting hole and the third limiting hole are coaxially corresponding in an initial state, and the second limiting hole and the;

a first limiting column capable of sliding along the axial direction of the first limiting hole is arranged in the first limiting hole, the length of the first limiting column extending into the third limiting hole is X in the initial state, a third limiting column capable of sliding along the axial direction of the third limiting column is arranged in the third limiting hole, the first limiting column is abutted with the third limiting column and is arranged to be an arc surface matched with the outer circular surface of the second inner lock cylinder body close to one end face, the first limiting hole and the second limiting hole are separated from the opening at one end of the second inner lock cylinder body and are provided with sealing screw plugs in threaded connection and matching with the second inner lock cylinder body, a first limiting spring is arranged in the first limiting hole, one end of the first limiting spring is abutted with the sealing screw plugs, the other end of the first limiting spring is abutted with the first limiting column, the elastic force of the first limiting spring is always directed to the first limiting column by the sealing screw plugs, the third limiting column, the sub-key column is inserted into the second inner lock cylinder barrel, the first magnet and the third magnet are mutually repelled when approaching one end face, and the displacement of the first limit column moving towards the first limit hole is driven by the magnitude of the repulsive force to be equal to X;

a fourth limiting column capable of sliding along the axial direction of the fourth limiting column is arranged in the fourth limiting hole, the length of the fourth limiting column extending into the second limiting hole in the initial state is Y, a second limiting column capable of sliding along the axial direction of the second limiting column is arranged in the second limiting hole, the second limiting column is abutted against the fourth limiting column and is close to the fourth limiting column, an arc surface matched with the outer circular surface of the second inner lock cylinder body is formed in a full-section mode, a cylindrical magnet II is coaxially and fixedly arranged on one end surface of the fourth limiting column close to the inner portion of the second lock cylinder body, a second limiting spring is sleeved outside the second magnet, one end of the second limiting spring is fixedly connected with the fourth limiting column, the other end of the second limiting spring is fixedly connected with the first built-in step, the elastic force of the second limiting spring is used for keeping the fourth limiting column in the initial state, a fourth magnet is embedded in the outer circular surface of the sub-key column, the sub-key column is inserted into the second inner lock cylinder body, the second Y;

the first limiting hole, the third limiting hole and structures in the first limiting hole, the second limiting hole, the fourth limiting hole and structures in the fourth limiting hole form a second limiting member, the first limiting member is randomly provided with a plurality of magnets which are arranged in parallel to the radial direction of the outer lock cylinder body, the second limiting member is randomly provided with a plurality of magnets which are arranged in parallel to the radial direction of the outer lock cylinder body, the third magnet and the fourth magnet which are correspondingly matched with the sub-key columns are arranged outside the sub-key columns, and the anti-theft codes of the sub-locks are formed by randomly arranging and combining the first limiting member and the second limiting member;

the secondary key is inserted into the second inner lock cylinder body and the limiting mechanism is enabled to remove the rotation restriction on the second inner lock cylinder body, the process is that after the restriction on the secondary key is removed by the restriction component, the secondary key cannot be rapidly switched to an extending state, a user rotates the handle clockwise, the handle drives the secondary key columns to synchronously rotate, when the guide convex strips are aligned with the convex strip grooves, the secondary key columns extend outwards from the inside of the primary key cylinder and are inserted into the second inner lock cylinder body, at the moment, the magnets three and the magnets I are opposite to each other and drive the limiting columns I to move towards the limiting holes I under the action of repulsive force of the magnets I and the magnets II, the magnets four are opposite to each other and drive the limiting columns IV to move towards the limiting holes IV under the action of attractive force, the displacement is equal to Y, at the moment, the limiting columns I are completely arranged in the limiting holes I, and the limiting columns II are completely arranged in the limiting holes II, the third limiting column is completely arranged in the third limiting hole, the fourth limiting column is completely arranged in the fourth limiting hole, the limiting mechanism removes the rotation restriction on the second inner lock cylinder body, the user further rotates the handle, the second inner lock cylinder body drives the shifting piece to rotate, the shifting piece enables the lock tongue to retract and be separated from the door frame, and the anti-theft door is opened;

s4: in the process of pulling out the key body, the handle is rotated reversely and pulled out, in the process, the first limiting spring drives the first limiting member to reset, the second limiting spring drives the second limiting member to reset, the limiting mechanism restores the rotation restriction on the second inner lock cylinder body, the marble restores the rotation restriction on the first inner lock cylinder body, and then, a user manually presses the sub key cylinder to retract into the main key cylinder, and the restriction member restricts the sub key in a retraction state.

As a further optimization or improvement of the present solution.

The binding member set up between sub-key post and female key cylinder and be close to the handle and arrange, the binding member is including seting up the mounting groove on the outer disc of sub-key post, the mounting groove is provided with two and along the axial symmetric arrangement of sub-key post, the notch department of mounting groove is provided with can follow the about piece that sub-key post is radially floated, be provided with the restraint spring in the mounting groove, the tank bottom fixed connection of restraint spring one end and mounting groove, the other end and about piece fixed connection, set up on the outer disc of female key cylinder with about piece assorted about hole, about piece inserts to restrict downtheholely under the initial condition.

As a further optimization or improvement of the present solution.

The coaxial annular boss that is provided with in outer end of outer lock core barrel, the boss deviates from outer lock core barrel one end and has seted up interior heavy groove coaxially, the guide way has been seted up to the tank bottom in interior heavy groove, the guide way includes trigger section and the changeover portion of head and the tail switch-on, this trigger section and outer lock core barrel axis between the distance rotate along clockwise and reduce gradually, this changeover portion sets to the arc structure of arranging with outer lock core barrel is coaxial and the head of this changeover portion and trigger section follow clockwise's afterbody switch-on, the guide way is provided with two and constitutes central symmetry along the axis of outer lock core barrel.

As a further optimization or improvement of the present solution.

The first inner lock cylinder body is provided with a sliding groove which is arranged along the radial direction of the first inner lock cylinder body, one end, away from the second inner lock cylinder body, of the first inner lock cylinder body is provided with two sliding grooves which are symmetrically arranged along the axial direction of the first inner lock cylinder body, a sliding block is arranged in each sliding groove and forms sliding guide fit along the radial direction of the outer lock cylinder body, a guide protrusion is fixedly arranged on each sliding block, extends into each guide groove and forms sliding guide fit along the guide direction of each guide groove, in an initial state, the guide protrusion is located at the head of each guide groove triggering section, the sliding block is flush with the inner circular surface of the first inner lock cylinder body, when a master key is combined with the first inner lock cylinder body, the sliding block is aligned with the constraint hole and used for pushing the constraint block, and the notch of the inner.

As a further optimization or improvement of the present solution.

The inner circular surface of the second inner lock cylinder body is provided with a guide raised line parallel to the axial direction of the second inner lock cylinder body, the outer circular surface of the sub-key cylinder body is provided with a raised line groove parallel to the axial direction of the sub-key cylinder body, and the guide raised line is matched with the raised line groove and is used for guiding the first magnet and the third magnet to be aligned with each other and the second magnet to be aligned with the fourth magnet to be aligned with each other.

Compared with the prior art, the anti-theft lock has the advantages that the structure is ingenious, the principle is simple, the coding is diversified, the production cost is low, the anti-theft lock is convenient to popularize and apply, the coding is realized by matching the sub-lock and the master lock, the master key and the master lock are firstly matched and matched to rotate to trigger the sub-key to be popped out from the master key and matched with the sub-lock, the sub-lock cylinder drives the shifting piece to rotate to enable the lock tongue to retract and be separated from the door frame, the sub-lock cylinder controls the extension of the limiting columns with different lengths through magnetic force, the coding mode is novel and diversified, and the.

Drawings

Fig. 1 is a matching view of a lock cylinder body and a key body.

Fig. 2 is a matching view of the lock cylinder body and the key body.

Fig. 3 is a matching view of the lock cylinder body and the key body.

Fig. 4 is a schematic structural view of the lock cylinder body.

Fig. 5 is a schematic structural view of the retracted state of the key body.

Fig. 6 is a schematic structural view of the key body in an extended state.

FIG. 7 is an exploded view of the lock cylinder body.

Fig. 8 is a schematic view of the internal structure of the lock cylinder body.

Fig. 9 is a schematic structural view of the first internal cylinder barrel.

Fig. 10 is a schematic structural view of the trigger member.

FIG. 11 is a mating view of the trigger member with the outer cylinder barrel.

FIG. 12 is a mating view of the trigger member with the outer cylinder barrel.

Figure 13 is a mating view of the second inner cylinder barrel with the outer cylinder barrel.

Fig. 14 is a connection diagram of the second internal cylinder barrel and the pick.

FIG. 15 is a cross-sectional view of a second inner cylinder barrel and an outer cylinder barrel.

Fig. 16 is a schematic structural view of an external cylinder body.

Fig. 17 is a schematic structural view of the second internal cylinder barrel.

FIG. 18 is a cross-sectional view of a second internal cylinder barrel.

Fig. 19 is a view showing the combination of the master key and the slave key.

Fig. 20 is a sectional view of the sub-key.

Fig. 21 is a schematic view of a sub-key structure.

Fig. 22 is a sectional view of the master key.

Detailed Description

firstly, unlocking a master lock;

s1: a user firstly inserts a master key 220 into the first inner cylinder barrel 130, the saw-toothed protrusions on the master key barrel push the protruded marbles back and completely place the marbles in the first inner cylinder barrel 130/outer cylinder barrel 120, and at the moment, the marbles remove the rotational constraint between the first inner cylinder barrel 130 and the outer cylinder barrel 120;

the lock cylinder body 100 comprises a cylindrical outer lock cylinder body 120 with two openings at two ends, a first inner lock cylinder body 130 and a second inner lock cylinder body 140 coaxially arranged in the outer lock cylinder body 120, the first inner lock cylinder body 130 and the second inner lock cylinder body 140 are both ring body structures with two openings at two ends, one end of the outer lock cylinder body 120 is an outer end, the other end is an inner end, the first inner lock cylinder body 130 is arranged near the outer end thereof, the second inner lock cylinder body 140 is arranged near the inner end thereof, balls for restricting rotation are arranged between the first inner lock cylinder body 130 and the outer lock cylinder body 120 to jointly form a master lock, a limiting mechanism for restricting rotation is arranged between the second inner lock cylinder body 140 and the outer lock cylinder body 120 to jointly form a sub lock, the key body 200 comprises a handle 210, a master key 220 matched with the master lock, a sub key 230 matched with the sub lock, and a restricting member 240 arranged between the master key 220 and the sub key 230, the master key 220 is coaxially sleeved outside the subsidiary key 230, the subsidiary key 230 is disposed in a retracted state and an extended state that can be switched with each other and is constrained in the retracted state by the initial state constraint member 240;

the pins between the master key 220 and the master lock protrude into the first inner lock cylinder body 130, the protruding lengths of the different pins are different, the master key 220 comprises a master key cylinder fixedly connected with a sun handle 210, the outer circular surface of the master key cylinder is provided with saw-toothed protrusions matched with the pins, and the matched unlocking between the master key 220 and the master lock is the same as that in the prior art;

(II) extending the sub-key;

s2: the user rotates the handle 210, the first internal cylinder barrel 130 rotates synchronously and the restriction member 240 releases the restriction on the sub-key 230, the sub-key 230 is switched from the retracted state to the extended state and inserted into the second internal cylinder barrel 140;

the secondary key 230 comprises a secondary key column which forms sliding guide fit with the primary key cylinder along the axial direction of the primary key cylinder, the length of the secondary key column extending out of the primary key cylinder and the diameter of the secondary key column are matched with the second inner lock cylinder body 140, one end of the secondary key column close to the handle 210 is coaxially provided with a sleeving groove 231, the middle position of the sleeving groove 231 along the groove depth direction is coaxially provided with a built-in step two 232, the built-in step two 232 extends to the handle 210, the diameter of the built-in step two 232 is larger than that of the sleeving groove 231, a guide rod 211 fixedly connected with the handle 210 is arranged in the sleeving groove 231, the secondary key column and the guide rod 211 form sliding guide fit along the axial direction, a firing spring 233 is movably sleeved outside the guide rod 211, one end of the firing spring 233 is abutted against the built-in step two 232, the other end of the firing spring 233 is abutted against the handle 210, and the elasticity;

an external step 234a is arranged at one end, close to the handle 210, of the sub-key column, an internal step three 234b matched with the external step 234a is arranged at one end, away from the handle 210, of the master key cylinder, and the external step 234a and the internal step three 234b are matched with each other to restrict the sliding stroke of the sub-key along the master key cylinder;

the constraint member 240 is arranged between the sub-key cylinder and the master key cylinder and is close to the handle 210, the constraint member 240 comprises two mounting grooves 241 arranged on the outer circular surface of the sub-key cylinder, the two mounting grooves 241 are symmetrically arranged along the axial direction of the sub-key cylinder, a constraint block 242 capable of floating along the radial direction of the sub-key cylinder is arranged at the notch of the mounting groove 241, a constraint spring is arranged in the mounting groove 241, one end of the constraint spring is fixedly connected with the groove bottom of the mounting groove 241, the other end of the constraint spring is fixedly connected with the constraint block 242, a constraint hole 243 matched with the constraint block 242 is formed in the outer circular surface of the master key cylinder, and in an initial state, the constraint block 242 is inserted into;

the outer end of the outer lock cylinder barrel 120 is coaxially provided with an annular boss 121, one end of the boss 121, which is far away from the outer lock cylinder barrel 120, is coaxially provided with an inner sunken groove 122, the bottom of the inner sunken groove 122 is provided with a guide groove 123, the guide groove 123 comprises a triggering section and a transition section which are communicated end to end, the distance between the triggering section and the central axis of the outer lock cylinder barrel 120 is gradually reduced along clockwise rotation, the transition section is provided with an arc-shaped structure which is coaxially arranged with the outer lock cylinder barrel 120, the head of the transition section is communicated with the tail of the triggering section along the clockwise direction, and the two guide grooves 123 are arranged and form central symmetry along the central axis of the outer lock cylinder;

one end of the first inner lock cylinder body 130, which is far away from the second inner lock cylinder body 140, is provided with two sliding grooves 131 which are arranged along the radial direction of the first inner lock cylinder body, the two sliding grooves 131 are symmetrically arranged along the axial direction of the first inner lock cylinder body 310, a sliding block 132 is arranged in the sliding groove 131, and the two sliding grooves form sliding guide fit along the radial direction of the outer lock cylinder body 120, the slide block 132 is fixedly provided with a guide protrusion 133, the guide protrusion 133 extends into the guide groove 123 and forms a sliding guide fit along the guiding direction of the guide groove 123, and in an initial state, the guide projection 133 is located at the head of the trigger section of the guide groove 123 and the slider 132 is flush with the inner circumferential surface of the first internal cylinder barrel 130, and when the master key 220 is coupled with the first internal cylinder barrel 130, the slider 132 is aligned with the restraining aperture 243 and is configured to push against the restraining block 242, an annular end cover 124 for sealing the inner sunken groove 122 is arranged at the notch of the inner sunken groove;

the process of the primary key 220 and the primary lock matching and rotating and the secondary key 230 being switched to the extended state is that the primary key 220 is inserted into the first inner cylinder barrel 130, the primary key barrel removes the rotational restriction of the pin tumbler between the outer cylinder barrel 120 and the first inner cylinder barrel 130, at this time, the handle 210 is rotated clockwise to drive the first inner cylinder barrel 130 to rotate synchronously, the first inner cylinder barrel 130 drives the sliding block 132 to rotate synchronously, the sliding block 132 drives the guide protrusion 133 to rotate synchronously, the guide protrusion 133 slides along the triggering section of the guide groove 123, the guide groove 123 and the guide protrusion 133 match to enable the two sliding blocks 132 to slide close to each other along the radial direction of the first inner cylinder barrel 130, the sliding block 132 is inserted into the restriction hole 243 and pushes against the restriction block 242, the restriction block 242 retracts into the secondary key 241 against the elastic force of the restriction spring, the restriction member 240 removes the restriction of the key column, at this time, the trigger spring 233 will push the sub-key cylinder to slide toward the outside of the master key cylinder, and the sub-key 230 is switched to the extended state and inserted into the second internal cylinder barrel 140;

(III) unlocking the sub-lock;

s3: the sub-key 230 makes the limiting mechanism release the constraint between the outer cylinder body 120 and the second inner cylinder body 140 by magnetic attraction/repulsion, further rotates the handle 210, the second inner cylinder body 140 rotates and drives the plectrum 150 to synchronously rotate, and the plectrum 150 makes the bolt retract and separate from the doorframe by the linkage;

the limiting mechanism comprises a first limiting hole 125 and a second limiting hole 126 which are arranged outside the outer lock cylinder body 120 and penetrate through the outer lock cylinder body 120, the axial directions of the first limiting hole 125 and the second limiting hole 126 are parallel to each other and are parallel to the radial direction of the outer lock cylinder body 120, the limiting mechanism also comprises a third limiting hole 141 and a fourth limiting hole 142 which are arranged outside the second inner lock cylinder body 140 and penetrate through the inner part of the second inner lock cylinder body 140, the axial directions of the third limiting hole 141 and the fourth limiting hole 142 are parallel to each other and are parallel to the radial direction of the second inner lock cylinder body 140, one ends of the third limiting hole 141 and the fourth limiting hole 142, which are close to the inner part of the second inner lock cylinder body 140, are provided with a first built-in step 143, in an initial state, the first limiting hole 125 and the third limiting hole 141 are coaxially corresponding, and;

a first limit column 127 which can slide along the axial direction of the first limit hole 125 is arranged in the first limit hole 125, the length of the first limit column 127 extending into a third limit hole 141 is X in the initial state, a third limit column 144 which can slide along the axial direction of the third limit hole 141 is arranged in the third limit hole 141, the first limit column 127 is abutted against the third limit column 144, one end surface of the first limit column 127, which is close to the third limit column 144, is arranged to be an arc surface matched with the outer circular surface of the second inner lock cylinder body 140, an opening of one end of the first limit hole 125 and the second limit hole 126, which is far away from the second inner lock cylinder body 140, is provided with a sealing plug 128 which is in threaded connection and matching with the first limit column, a first limit spring 129 is arranged in the first limit hole 125, one end of the first limit spring 129 is abutted against the sealing plug 128, the other end of the first limit column is abutted against the first limit column 127, the, a magnet III 237 is embedded on the outer circular surface of the sub-key column, the sub-key column is inserted into the second inner lock cylinder body 140, the magnet I145 and the magnet III 237 are mutually repelled by approaching one end face, and the displacement of the first limit column 127 moving towards the first limit hole 125 is driven by the magnitude of the repulsive force to be equal to X;

a fourth limiting column 147 capable of sliding along the axial direction of the fourth limiting hole 142 is arranged in the fourth limiting hole 142, the length of the fourth limiting column 147 extending into the second limiting hole 126 in the initial state is Y, a second limiting column capable of sliding along the axial direction of the second limiting hole 126 is arranged in the second limiting hole 126, the second limiting column is in contact with the fourth limiting column 147 and is close to the fourth limiting column 147, an arc surface matched with the outer circular surface of the second inner cylinder body 140 is formed, a cylindrical magnet 146 is coaxially and fixedly arranged on one end surface of the fourth limiting column 147 close to the inner part of the second cylinder body 140, a second limiting spring 148 is sleeved outside the magnet 146, one end of the second limiting spring 148 is fixedly connected with the fourth limiting column 147, the other end of the second limiting column 147 is fixedly connected with the first built-in step 143, the elastic force of the second limiting spring 148 is used for maintaining the fourth limiting column 147 in the initial state, a fourth magnet 238 is embedded on the outer circular surface, the second magnet 146 and the fourth magnet 238 are mutually attracted near one end surface, and the displacement of the fourth limit column 147 moving towards the fourth limit hole 142 is equal to Y under the action of the attraction force;

the first limiting hole 125, the third limiting hole 141 and the structures inside the first limiting hole, the second limiting hole 126, the fourth limiting hole 142 and the structures inside the second limiting hole form a second limiting member, the first limiting member is arbitrarily provided with a plurality of limiting holes which are parallel to the radial direction of the outer lock cylinder body 120, the second limiting member is arbitrarily provided with a plurality of limiting holes which are parallel to the radial direction of the outer lock cylinder body 120, the outer part of the sub-key column is provided with a magnet III 237 and a magnet IV 238 which are correspondingly matched with the sub-key column, and the anti-theft code of the sub-lock is formed by the random arrangement and combination of the first limiting member and the second limiting member;

the sub-key 230 is inserted into the second internal cylinder 140 and the limiting mechanism is released from the rotational constraint on the second internal cylinder 140, the process is that after the constraint of the sub-key 230 is released by the constraint member 240, the sub-key 230 cannot be rapidly switched to the extended state, the user rotates the handle 210 clockwise, the handle 210 drives the sub-key columns to synchronously rotate, when the guide convex strips 149 are aligned with the convex strip grooves 236, the sub-key columns extend outwards from the inside of the master key cylinder and are inserted into the second internal cylinder 140, at this time, the magnets three 237 and the magnets one 145 are relatively positive and drive the limiting columns one 127 to move towards the limiting holes one 125 under the action of the repulsive force of the magnets X, the magnets four 238 and the magnets two 146 are relatively positive and drive the limiting columns four 147 to move towards the limiting holes four 142 under the action of the attractive force of the magnets Y, at this time, the limiting columns one 127 are completely placed in the limiting holes one 125, the second limiting column is completely arranged in the second limiting hole 126, the third limiting column 144 is completely arranged in the third limiting hole 141, the fourth limiting column 147 is completely arranged in the fourth limiting hole 142, the limiting mechanism relieves the rotation constraint on the second inner lock cylinder body 140, the user further rotates the handle, the second inner lock cylinder body 140 drives the shifting piece 150 to rotate, the shifting piece 150 enables the lock tongue to retract and to be separated from the door frame, and the anti-theft door is opened;

s4: during the process of pulling out the key body 200, the handle 210 is rotated reversely and pulled out, in the process, the first limit spring 129 drives the first limit member to reset, the second limit spring 148 drives the second limit member to reset, the limit mechanism restores the rotation restriction of the second inner cylinder body 140, the marble restores the rotation restriction of the first inner cylinder body 130, and then, the user manually presses the sub key cylinder to retract into the main key cylinder, and the restriction member 240 restricts the sub key 230 in the retraction state.

A master-slave anti-theft lock unlocked by a magnetic code comprises a lock cylinder body 100 and a key body 200 matched with the lock cylinder body 100, wherein the lock cylinder body 100 comprises an outer lock cylinder barrel 120 which is columnar and is provided with two openings at two ends, a first inner lock cylinder barrel 130 and a second inner lock cylinder barrel 140 which are coaxially arranged in the outer lock cylinder barrel 120, the first inner lock cylinder barrel 130 and the second inner lock cylinder barrel 140 are both of ring body structures with two openings at two ends, one end of the outer lock cylinder barrel 120 is an outer end, the other end is an inner end, the first inner lock cylinder barrel 130 is arranged close to the outer end, the second inner lock cylinder barrel 140 is arranged close to the inner end, balls used for restricting rotation are arranged between the first inner lock cylinder barrel 130 and the outer lock cylinder barrel 120 to jointly form a master lock, a limiting mechanism used for restricting rotation is arranged between the second inner lock cylinder barrel 140 and the outer lock cylinder barrel 120 to jointly form, the key body 200 includes a handle 210, a primary key 220 matching with the primary lock, a secondary key 230 matching with the secondary lock, and a constraint member 240 disposed between the primary key 220 and the secondary key 230, the primary key 220 is coaxially sleeved outside the secondary key 230, the secondary key 230 is disposed in a retracted state and an extended state that can be switched with each other, and the initial state constraint member 240 constrains the secondary key in the retracted state.

The pins between the master key 220 and the master lock protrude into the first inner lock cylinder body 130, and the protruding lengths of the different pins are different, the master key 220 includes a master key cylinder fixedly connected to the sun handle 210, the outer circumferential surface of the master key cylinder is provided with saw-toothed protrusions matched with the pins, and the matched unlocking between the master key 220 and the master lock is the same as that in the prior art, and is not described again.

The second internal cylinder barrel 140 is connected with a pick 150 for driving a lock tongue, the master key 220 and the master lock are matched with each other to rotate for triggering to enable the sub-key 230 to be switched to an extended state, and the sub-key 230 in the extended state is used for releasing the rotation restriction of the limiting mechanism between the second internal cylinder barrel 140 and the external cylinder barrel 120.

In use, a user first inserts the master key 220 into the first inner plug cylinder 130, and the serration on the master key cylinder pushes the protruding pins back and completely locates them in the first inner plug cylinder 130/outer plug cylinder 120, at this time, the marble removes the rotation restriction between the first inner cylinder barrel 130 and the outer cylinder barrel 120, the user rotates the handle 210, the first inner cylinder barrel 130 synchronously rotates and enables the restriction member 240 to remove the restriction on the sub-key 230, the sub-key 230 is switched to the extending state from the retracting state and is inserted into the second inner cylinder barrel 140, the sub-key 230 enables the limiting mechanism to remove the restriction between the outer cylinder barrel 120 and the second inner cylinder barrel 140 through attraction/repulsion of magnetic force, the handle 210 is further rotated, the second inner cylinder barrel 140 rotates and drives the plectrum 150 to synchronously rotate, and the plectrum 150 enables the lock tongue to retract and be separated from the door frame through the linkage.

Specifically, in order to protect and install the master lock and the slave lock, the outer shell 110 is sleeved outside the outer lock cylinder body 120, and the outer shell 110 is detachably connected and matched with the door panel.

When the master key 220 is inserted into the master lock and rotated, the constraint member 240 is required to release the constraint of the master key 220 on the slave key 230, and the slave key 230 is automatically switched from the retracted state to the extended state, for this reason, the slave key 230 includes a slave key cylinder which forms a sliding guide fit with the master key cylinder along the axial direction thereof, the length of the slave key cylinder extending out of the master key cylinder and the diameter of the slave key cylinder are matched with the second internal lock cylinder body 140, a sleeve groove 231 is coaxially opened at one end of the slave key cylinder close to the handle 210, a built-in step two 232 is coaxially opened at the middle position of the sleeve groove 231 along the groove depth direction, the built-in step two 232 extends through the handle 210, the diameter of the built-in step two 232 is larger than that of the sleeve groove 231, a guide rod 211 fixedly connected with the handle 210 is arranged in the sleeve groove 231, the slave key cylinder forms a sliding guide fit with the guide rod 211 along the axial direction thereof, in order that the slave, the outside of the guide rod 211 is movably sleeved with a trigger spring 233, one end of the trigger spring 233 abuts against the second built-in step 232, the other end of the trigger spring 233 abuts against the handle 210, the elastic force of the trigger spring 233 always points to the second built-in step 232 from the handle 210, and the sub-key column slides towards the outside of the main key cylinder under the elastic force action of the trigger spring 233, so that the sub-key 230 is switched to the extended state.

Specifically, in order to avoid the falling off between the sub-key cylinder and the master key cylinder, an external step 234a is arranged at one end of the sub-key cylinder close to the handle 210, an internal step three 234b matched with the external step 234a is arranged at one end of the master key cylinder far away from the handle 210, and the external step 234a and the internal step three 234b are matched with each other to restrict the sliding stroke of the sub-key along the master key cylinder, so that the significance is to avoid the falling off between the sub-key cylinder and the master key cylinder.

In an initial state, it is required to ensure that the secondary key 230 is in a retracted state, in order to overcome the elastic force of the firing spring 233, the secondary key cylinder is located inside the primary key cylinder, the constraint member 240 is disposed between the secondary key cylinder and the primary key cylinder and is disposed close to the handle 210, the constraint member 240 includes two mounting grooves 241 disposed on the outer circumferential surface of the secondary key cylinder, the two mounting grooves 241 are disposed and are symmetrically disposed along the axial direction of the secondary key cylinder, a constraint block 242 capable of floating along the radial direction of the secondary key cylinder is disposed at the notch of the mounting groove 241, a constraint spring is disposed in the mounting groove 241, one end of the constraint spring is fixedly connected with the groove bottom of the mounting groove 241, the other end of the constraint spring is fixedly connected with the constraint block 242, a constraint hole 243 matched with the constraint block 242 is disposed on the outer circumferential surface of the primary key cylinder.

When the master key 220 is inserted into the first inner cylinder barrel 130 and rotates, the constraint block 242 needs to overcome the elastic force of the constraint spring to move towards the bottom of the installation groove 241 and separate from the constraint hole 243, for this reason, an annular boss 121 is coaxially arranged at the outer end of the outer cylinder barrel 120, an inner sunken groove 122 is coaxially arranged at one end of the boss 121, which is far away from the outer cylinder barrel 120, a guide groove 123 is arranged at the bottom of the inner sunken groove 122, the guide groove 123 includes a triggering section and a transition section which are communicated end to end, the distance between the triggering section and the central axis of the outer cylinder barrel 120 gradually decreases along the clockwise rotation, the transition section is arranged in an arc structure which is coaxially arranged with the outer cylinder barrel 120, the head of the transition section is communicated with the tail of the triggering section along the clockwise direction, and the guide grooves 123 are arranged in two and are centrosymmetric along the central axis of the.

One end of the first inner lock cylinder body 130, which is far away from the second inner lock cylinder body 140, is provided with two sliding grooves 131 which are arranged along the radial direction of the first inner lock cylinder body, the two sliding grooves 131 are symmetrically arranged along the axial direction of the first inner lock cylinder body 310, a sliding block 132 is arranged in the sliding groove 131, and the two sliding grooves form sliding guide fit along the radial direction of the outer lock cylinder body 120, the slide block 132 is fixedly provided with a guide protrusion 133, the guide protrusion 133 extends into the guide groove 123 and forms a sliding guide fit along the guiding direction of the guide groove 123, and in an initial state, the guide projection 133 is located at the head of the trigger section of the guide groove 123 and the slider 132 is flush with the inner circumferential surface of the first internal cylinder barrel 130, and when the master key 220 is coupled with the first internal cylinder barrel 130, the slider 132 is aligned with the restraining aperture 243 and is configured to push against the restraining block 242, in order to avoid the separation between the sliding block 132 and the sliding groove 131, a notch of the inner sinking groove 122 is provided at the annular end cap 124 for sealing it.

The master key 220 and the master lock are matched and rotated in a matching manner and the slave key 230 is switched to an extended state, which is specifically shown in the following steps that the master key 220 is inserted into the first inner cylinder barrel 130, the master key barrel removes rotational constraint of the marble between the outer cylinder barrel 120 and the first inner cylinder barrel 130, at the moment, the handle 210 is rotated clockwise to drive the first inner cylinder barrel 130 to rotate synchronously, the first inner cylinder barrel 130 drives the sliding block 132 to rotate synchronously, the sliding block 132 drives the guide protrusion 133 to rotate synchronously, the guide protrusion 133 slides along the triggering section of the guide groove 123, the guide groove 123 and the guide protrusion 133 are matched to enable the two sliding blocks 132 to slide close to each other along the radial direction of the first inner cylinder barrel 130, the sliding block 132 is inserted into the constraint hole 243 and pushes against the constraint block 242, the constraint block 242 retracts into the slave key 241 by overcoming the elastic force of the constraint spring, and the constraint member 240 removes the constraint of the key column, at this time, the cocking spring 233 will push the sub-key cylinder to slide toward the outside of the master key cylinder, and the sub-key 230 is switched to the extended state and inserted into the second internal cylinder barrel 140.

In order to make the limiting mechanism restrain the rotation of the second internal cylinder body 140 and make the limiting mechanism release the rotation restraint of the second internal cylinder body 140 when the sub-key 230 matched with the limiting mechanism is inserted into the second internal cylinder body 140, the outer circular surface of the external cylinder body 120 is set to be a polygonal structure, the limiting mechanism comprises a first limiting hole 125 and a second limiting hole 126 which are arranged outside the external cylinder body 120 and penetrate through the external cylinder body 120 to the inside, the axial directions of the first limiting hole 125 and the second limiting hole 126 are parallel to each other and are parallel to the radial direction of the external cylinder body 120, the limiting mechanism further comprises a third limiting hole 141 and a fourth limiting hole 142 which are arranged outside the second internal cylinder body 140 and penetrate through the inside, the axial directions of the third limiting hole 141 and the fourth limiting hole 142 are parallel to each other and are parallel to the radial direction of the second internal cylinder body 140, one end of the third limiting hole 141 and the fourth limiting hole 142, which are close to the inside of the second internal cylinder body 140, is provided with a, in the initial state, the first limiting hole 125 and the third limiting hole 141 are coaxially corresponding, and the second limiting hole 126 and the fourth limiting hole 142 are coaxially corresponding.

Specifically, in order to rotationally restrain the outer lock cylinder body 120 and the second inner lock cylinder body 140, a first limit post 127 capable of sliding along the axial direction is arranged in the first limit hole 125, in an initial state, the length of the first limit post 127 extending into the third limit hole 141 is X, a third limit post 144 capable of sliding along the axial direction is arranged in the third limit hole 141, the first limit post 127 abuts against the third limit post 144, one end surface of the first limit post 127 and one end surface of the first limit post are close to each other and are arranged to be arc surfaces matched with the outer circular surface of the second inner lock cylinder body 140, a sealing plug screw 128 in threaded connection and matching with the opening of the first limit hole 125 and the second limit hole 126, which is far away from one end of the second inner lock cylinder body 140, is arranged in the first limit hole 125, a first limit spring 129 is arranged in the first limit hole 125, one end of the first limit spring 129 abuts against the sealing plug screw 128, the other end abuts, the third limiting column 144 is coaxially and fixedly provided with a first cylindrical magnet 145 close to one end inside the second internal cylinder body 140, in order to enable the second internal cylinder body 140 to rotate, the first limiting column 127 needs to be completely arranged in the first limiting hole 125, and the third limiting column 144 needs to be completely arranged in the third limiting hole 141, so that the third magnet 237 is embedded on the outer circular surface of the sub-key column, the sub-key column is inserted into the second internal cylinder body 140, the first magnet 145 and the third magnet 237 are mutually repelled close to one end face, and the displacement of the first limiting column 127 moving towards the first limiting hole 125 is equal to X due to the size of the repulsive force.

Specifically, in order to further rotationally restrain the outer cylinder body 120 and the second inner cylinder body 140, a fourth limiting post 147 capable of sliding along the axial direction is arranged in the fourth limiting hole 142, the length of the fourth limiting post 147 extending into the second limiting hole 126 in the initial state is Y, a second limiting post capable of sliding along the axial direction is arranged in the second limiting hole 126, the second limiting post is in contact with the fourth limiting post 147 and is close to the fourth limiting post 147, a section of arc-shaped surface matched with the outer circular surface of the second inner cylinder body 140 is fully arranged, a second cylindrical magnet 146 is coaxially and fixedly arranged on one end surface of the fourth limiting post 147 close to the inner portion of the second cylinder body 140, a second limiting spring 148 is sleeved outside the second magnet 146, one end of the second limiting spring 148 is fixedly connected with the fourth limiting post 147, the other end of the second limiting spring is fixedly connected with the first built-in step 143, and the elastic force of the second limiting spring 148 is used for maintaining, in order to enable the second internal lock cylinder 140 to rotate, the fourth limiting column 147 is required to be completely arranged in the fourth limiting hole 142 and the second limiting column is required to be completely arranged in the second limiting hole 126, for this purpose, a magnet four 238 is embedded on the outer circular surface of the sub-key column, the sub-key column is inserted into the second internal lock cylinder body 140, the magnet four 238 and the magnet two 146 are close to one end surface and mutually attract each other, and the displacement of the attraction force drives the fourth limiting column 147 to move towards the inside of the fourth limiting hole 142 is equal to Y.

In order to increase the anti-theft performance and the coding diversity of the sub-lock, the first limiting hole 125, the third limiting hole 141 and the internal structure of the first limiting hole, the second limiting hole 126, the fourth limiting hole 142 and the internal structure of the second limiting hole jointly form a second limiting member, the first limiting member is arbitrarily provided with a plurality of limiting members which are arranged in parallel to the radial direction of the outer lock cylinder body 120, the second limiting member is arbitrarily provided with a plurality of limiting members which are arranged in parallel to the radial direction of the outer lock cylinder body 120, the outer part of the sub-key cylinder is provided with a magnet three 237 and a magnet four 238 which are correspondingly matched with the sub-key cylinder, and the anti-theft code of the sub-lock is formed by arbitrarily arranging and combining the first limiting members and.

When the sub-key cylinder is inserted into the second internal cylinder 140, in order to facilitate the first magnet 145 and the third magnet 237 to be opposite to each other, the second magnet 146 is opposite to the fourth magnet 238, the inner circular surface of the second internal cylinder 140 is provided with a guide convex strip 149 parallel to the axial direction of the second internal cylinder, the outer circular surface of the sub-key cylinder is provided with a convex strip groove 236 parallel to the axial direction of the sub-key cylinder, the guide convex strip 149 is matched with the convex strip groove 236 and is used for guiding the first magnet 145, the third magnet 237 to be opposite to each other, and the second magnet 146 is opposite to the fourth magnet 238.

The sub-key 230 is inserted into the second internal cylinder 140 and the limiting mechanism is released from the rotational constraint on the second internal cylinder 140, which is characterized in that after the constraint of the sub-key 230 is released by the constraint member 240, the sub-key 230 cannot be rapidly switched to the extended state, the handle 210 is rotated clockwise by the user, the handle 210 drives the sub-key columns to synchronously rotate, when the guide convex strip 149 is aligned with the convex strip groove 236, the sub-key columns extend outwards from the inside of the master key cylinder and are inserted into the second internal cylinder 140, at this time, the magnets three 237 and the magnets one 145 are relatively positive and drive the limiting columns one 127 to move towards the limiting holes one 125 under the action of the repulsive force of the magnets X, the magnets four 238 and the magnets two 146 are relatively positive and drive the limiting columns four 147 to move towards the limiting holes four 142 under the action of the attractive force of the magnets Y, at this time, the limiting columns 127 one are completely placed in the limiting holes one 125, the second limiting column is completely arranged in the second limiting hole 126, the third limiting column 144 is completely arranged in the third limiting hole 141, the fourth limiting column 147 is completely arranged in the fourth limiting hole 142, the limiting mechanism relieves the rotation constraint on the second inner lock cylinder body 140, the user further rotates the handle, the second inner lock cylinder body 140 drives the shifting piece 150 to rotate, the shifting piece 150 enables the lock tongue to retract and be separated from the door frame, and the anti-theft door is opened.

During the process of pulling out the key body 200, the handle 210 is rotated reversely and pulled out, in the process, the first limit spring 129 drives the first limit member to reset, the second limit spring 148 drives the second limit member to reset, the limit mechanism restores the rotation restriction of the second inner cylinder body 140, the marble restores the rotation restriction of the first inner cylinder body 130, and then, the user manually presses the sub key cylinder to retract into the main key cylinder, and the restriction member 240 restricts the sub key 230 in the retraction state.

As a more optimized scheme of the present invention, in order to further improve the coding diversity of the master lock, a fixed disk 151 is disposed at one end of the pick 150 close to the second internal cylinder 140, the fixed disk 151 is coaxially and fixedly connected with one end of the second internal cylinder 140, a special-shaped protrusion 152 is disposed at a central position of an end surface of the fixed disk 151 close to the second internal cylinder 140, a special-shaped groove 235 matched with the special-shaped protrusion 152 is disposed at one end of the sub-key cylinder away from the handle 210, and when the guiding protrusion 149 is aligned with the protrusion groove 236, the special-shaped protrusion 152 is aligned with the special-shaped groove 235.

As a more perfect scheme of the present invention, in order to ensure the coaxiality between the first inner cylinder barrel 130 and the second inner cylinder barrel 140, coaxial rings 160 for fixing the first inner cylinder barrel 130 and the second inner cylinder barrel 140 are disposed on the outer circular surfaces of the ends close to each other, the coaxial rings 160 are formed by symmetrical half-ring bodies, the coaxial rings 160 are coaxially and rotatably connected and matched with the first inner cylinder barrel 130 and the second inner cylinder barrel 140, and the coaxial rings 160 are rotatably connected and matched with the inner circular surface of the outer cylinder barrel 120.

Claims

1. An unlocking method of a magnetic coded primary-secondary lock comprises the following steps:

firstly, unlocking a master lock;

the magnetic coded master-slave lock comprises a lock cylinder body and a key body matched with the lock cylinder body;

(II) extending the sub-key;

the binding member is arranged between the sub key column and the master key cylinder and is close to the handle, the binding member comprises two mounting grooves formed in the outer circular surface of the sub key column, the two mounting grooves are symmetrically arranged along the axial direction of the sub key column, binding blocks capable of floating along the radial direction of the sub key column are arranged at the notches of the mounting grooves, binding springs are arranged in the mounting grooves, one ends of the binding springs are fixedly connected with the groove bottoms of the mounting grooves, the other ends of the binding springs are fixedly connected with the binding blocks, binding holes matched with the binding blocks are formed in the outer circular surface of the master key cylinder, and the binding blocks are inserted into the binding holes in the initial state;

the outer end of the outer lock cylinder barrel is coaxially provided with an annular boss, one end of the boss, which is far away from the outer lock cylinder barrel, is coaxially provided with an inner sunken groove, the bottom of the inner sunken groove is provided with a guide groove, the guide groove comprises a triggering section and a transition section which are communicated end to end, the distance between the triggering section and the central axis of the outer lock cylinder barrel is gradually reduced along the clockwise rotation, the transition section is provided with an arc structure which is coaxially arranged with the outer lock cylinder barrel, the head of the transition section is communicated with the tail of the triggering section along the clockwise direction, and the two guide grooves are centrosymmetrically formed along the central axis of the outer lock cylinder barrel;

the first inner lock cylinder body is provided with two sliding grooves which are arranged along the radial direction of the first inner lock cylinder body, one end, away from the second inner lock cylinder body, of the first inner lock cylinder body is provided with sliding grooves, the sliding grooves are symmetrically arranged along the axial direction of the first inner lock cylinder body, sliding blocks are arranged in the sliding grooves and form sliding guide fit along the radial direction of the outer lock cylinder body, guide protrusions are fixedly arranged on the sliding blocks, the guide protrusions extend into the guide grooves and form sliding guide fit along the guide direction of the guide grooves, in an initial state, the guide protrusions are located at the head of a trigger section of the guide grooves, the sliding blocks are flush with the inner circular surface of the first inner lock cylinder body, when a master key is combined with the first inner lock cylinder body, the sliding blocks are aligned with the constraint holes and used for pushing the constraint blocks;

(III) unlocking the sub-lock;

the limiting mechanism comprises a first limiting hole and a second limiting hole which are arranged outside the outer lock cylinder body and penetrate into the outer lock cylinder body, the axial directions of the first limiting hole and the second limiting hole are parallel to each other and are parallel to the radial direction of the outer lock cylinder body, the limiting mechanism also comprises a third limiting hole and a fourth limiting hole which are arranged outside the second inner lock cylinder body and penetrate into the second inner lock cylinder body, the axial directions of the third limiting hole and the fourth limiting hole are parallel to each other and are parallel to the radial direction of the second inner lock cylinder body, one ends of the third limiting hole and the fourth limiting hole, which are close to the inner part of the second inner lock cylinder body, are provided with a first built-in step, the first limiting hole and the third limiting hole are coaxially corresponding in an initial state, and the second limiting hole and;

2. The unlocking method of a magnetic coded lock according to claim 1, wherein the pins between the master key and the master lock protrude into the first inner lock cylinder body, and the protruding lengths of the different pins are different, the master key comprises a master key cylinder fixedly connected with a sun handle, and the outer circumferential surface of the master key cylinder is provided with saw-toothed protrusions matched with the pins.

3. The method of claim 1, wherein the second inner cylinder has a guiding protrusion parallel to the axial direction of the second inner cylinder, the outer cylinder has a protrusion slot parallel to the axial direction of the second inner cylinder, and the guiding protrusion is matched with the protrusion slot and is used to guide the first magnet, the third magnet, and the fourth magnet.