CN112814483B

CN112814483B - Anti-theft puzzle lock

Info

Publication number: CN112814483B
Application number: CN202110042205.6A
Authority: CN
Inventors: 范晓悦
Original assignee: Pujiang Baoer Lock Co ltd
Current assignee: Pujiang Baoer lock Co.,Ltd.
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-12-28
Anticipated expiration: 2041-01-13
Also published as: CN112814483A

Abstract

An anti-theft combination lock comprising: a plug portion and a key portion; the lock core part and the key part are matched for use; the lock core part is adjusted in advance and is fixedly arranged in the lock; the code of the key part can be manually adjusted to unlock a plurality of lock cylinder parts with different codes; the loss caused by multiple keys on the body is avoided or the key delay unlocking time is difficult to distinguish, so that the unlocking time is greatly saved and the loss caused by the loss of the key is avoided; meanwhile, the lock cylinder is of a multi-layer lock structure, damage to the lock cylinder by various lock picking means is effectively prevented, safety is greatly improved, and economic loss is avoided.

Description

Anti-theft puzzle lock

Technical Field

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

Background

The lock sold in the market and generally used by people at present consists of a lock body, a lock core, and a marble and a spring in the lock body. Only one key is inserted into the lock core to rotate, so that the lock tongue can be shifted by the connecting piece at the rear end of the lock core to unlock. The lock has simple structure, few rows of the bullets, and easy unlocking by a theft-proof tool because the key hole is exposed; meanwhile, a plurality of keys are needed on the body of a person, so that the condition of losing or confusion is easily caused, and therefore, a lock and a key with adjustable passwords are needed, the lock with the plurality of keys can be unlocked by only one key, and meanwhile, the lock has an excellent anti-prying function, so that the safety is improved.

Disclosure of Invention

Aiming at the problem of the prior art, the invention provides an anti-theft coded lock, which aims to solve the problems that the existing lock is weak in anti-prying capability and needs to be provided with a plurality of keys to cause loss or confusion.

The technical scheme adopted by the invention is as follows: an anti-theft combination lock comprising: a plug portion and a key portion; the lock core part and the key part are matched for use; the lock core part is adjusted in advance and is fixedly arranged in the lock; the code of the key part can be manually adjusted to unlock a plurality of lock cylinder parts with different codes; the loss caused by multiple keys on the body is avoided or the key delay unlocking time is difficult to distinguish, so that the unlocking time is greatly saved and the loss caused by the loss of the key is avoided; the lock core part comprises: the lock comprises a shell mechanism, a first lock cylinder mechanism, a password mechanism and a second lock cylinder mechanism; the shell mechanism is fixedly arranged in the lock; the first lock core mechanism is fixedly arranged in the shell mechanism and is used for being matched with the password mechanism; the number of the password mechanisms is five, the password mechanisms are rotatably arranged inside the shell mechanism and sleeved on the first lock core mechanism, and the five password mechanisms can be rotatably adjusted to realize the password adjusting function; the second lock cylinder mechanism is rotatably arranged at the rear end of the shell mechanism and is matched with the shell mechanism for use so as to complete unlocking action; the plurality of password mechanisms are combined into a plurality of password combinations, so that the overall use scene is greatly increased; the second lock cylinder mechanism greatly increases the difficulty of picking the lock and improves the safety.

Further, the housing mechanism comprises: a lock cylinder shell and a shell clamping groove; the shell clamping groove is fixedly arranged on the right side of the round hole on the upper side of the lock cylinder shell.

Further, the first lock core mechanism includes: the lock comprises a shell a, a shell b, a lock cylinder a and a spring a; the shell a is fixedly arranged in the lock core shell; the shell b is fixedly arranged in the lock cylinder shell and is positioned at the upper end of the shell a, the shell b and the shell a form a key hole together, a plurality of round holes are formed in the shell b, and the lock cylinder a is arranged in the round holes in a sliding mode; the spring a is provided with a plurality of springs, the lower end of each spring a is fixedly connected with the bulge of the lock cylinder a, and the upper end of each spring a is fixedly connected with the bulge in the round hole of the shell b.

Further, the code mechanism comprises: a shell c, a lock cylinder b and a spring b; the shell c is rotatably arranged inside the lock cylinder shell, a plurality of round holes are formed in the shell c, and lock cylinders b with different lengths are slidably arranged in the round holes so as to achieve a password effect; and each round hole inside the shell c is provided with a spring b, one end of each spring b is fixedly connected with the bulge in the round hole of the shell c, and the other end of each spring b is fixedly connected with the bulge on the lock cylinder b.

Further, the second cylinder mechanism includes: the lock comprises a lock catch, a shell d, a lock cylinder c, a clamping block a, a spring c, a lock cylinder d, a spring d, a socket and a connecting rod; the lock catch is rotatably arranged at the rear end of the lock cylinder shell; the shell d is of a hollow structure and is fixedly arranged on the left side of the upper end of the lock catch; two cylinders at one end of the lock cylinder c are slidably arranged in a round hole in the shell d, a spring is arranged on a left end fixing block of the lock cylinder c, and the spring is fixedly connected with the outer wall of the shell d; a plurality of clamping blocks a are arranged, and round holes at two ends of each clamping block a are slidably arranged on two cylinders on the lock cylinder c; a spring c is arranged at the right end of the clamping block a, one end of the spring c is fixedly connected with the clamping block a, and the other end of the spring c is fixedly connected with a bulge of the lock cylinder c; the lock cylinders d are arranged in a plurality of circular holes formed in the shell d in a sliding mode; a spring d is arranged on the upper side of the lock cylinder d, the lower end of the spring d is fixedly connected with the lock cylinder d, and the upper end of the spring d is fixedly connected with a bulge of a round hole of the shell d; the outer side sliding block of the inserting opening is slidably arranged in the groove on the lock catch, and the left end of the inserting opening is provided with a cross groove; the upper end round hole of connecting rod rotates and installs on the cylinder of lock cylinder c one end, and the cylinder slidable mounting in the middle part of the connecting rod is in the spout that the hasp rear end was equipped with, and the lower extreme spout of connecting rod and the cylinder sliding connection that the socket rear end was equipped with.

Further, the key part includes: the device comprises a shell e, a plug, a clamping block b, a gear a, a knob b, a positioning rod, a lead screw and a gear b; the plug is fixedly arranged at the right end of the shell e, a cross block is arranged on the plug, and the cross block is matched with a cross groove on the socket; a plurality of clamping blocks b are arranged, the clamping blocks b are rotatably arranged at one end in the shell e, and each clamping block b is mutually and rotatably connected; a gear a is arranged inside the clamping block b; the knob a is rotatably arranged in the shell e; the knob b is rotatably arranged in the shell e; the positioning rod is fixedly arranged at the left end of the knob b, and the screw rod penetrates through a round hole of the knob b and is fixedly connected with the left end of the knob a; the round holes on the two sliding sides of the gear b are slidably mounted on the positioning rod, threads are arranged in the round hole in the middle of the gear b, the threads are in threaded fit with the lead screw, and the gear b is meshed with the gear a.

Due to the adoption of the technical scheme, the invention has the following advantages:

(1) the password that this lock core is adjustable unblanks through the password of adjustment key, great increase the efficiency of unblanking.

(2) The invention realizes the function that a plurality of lock cylinders with different codes can be unlocked only by adjusting the code of one key, thereby effectively avoiding the situation that a plurality of keys are lost and mixed.

(3) Before unblanking, need manual wrench movement knob a, adjust the password of key, convenient operation, simple to use for different passwords can be adjusted to a key, opens different locks, very big improvement convenience and security.

(4) When the lock is unlocked, the key with the adjusted password is inserted into the round hole formed by the shell a and the shell b to complete the opening action; the unlocking function of the lock cylinder is realized, so that the lock is convenient to unlock like other locks.

(5) The lock core parts with different passwords only allow the key part of the password arranged on the lock core part to be adjusted to be opened, so that the safety is greatly improved.

(6) The unique two-layer structure enables the lock core part to effectively prevent lock picking, and further improves the safety.

Drawings

FIG. 1 is an overall schematic view of the present invention.

Fig. 2 is a partial schematic view of a lock cylinder according to the present invention.

Fig. 3 is a partial internal schematic view of the lock cylinder of the present invention.

FIG. 4 is a schematic cross-sectional view of the combination mechanism of the present invention.

Fig. 5 is a schematic view of a first lock cylinder mechanism structure and a second lock cylinder mechanism of the present invention.

Fig. 6, 7 and 8 are schematic diagrams of the internal structure of the second lock cylinder mechanism of the invention.

FIG. 9 is a schematic view of the internal linkage of the second cylinder mechanism of the present invention.

FIG. 10 is a schematic view of the internal socket of the second cylinder mechanism of the present invention.

Fig. 11 is a partial schematic view of a key according to the present invention.

Fig. 12 is a schematic view of the internal structure of a key part of the present invention.

Reference numerals: 1-a lock cylinder part; 2-a key portion; 11-a housing mechanism; 12-a first core locking mechanism; 13-a cryptographic mechanism; 14-a second cylinder mechanism; 1101-a cylinder housing; 1102-housing card slot; 1201-shell a; 1202-case b; 1203-lock cylinder a; 1204-spring a; 1301-shell c; 1302-lock cylinder b; 1303-spring b; 1401-locking; 1402-housing d; 1403-lock cylinder c; 1404-fixture block a; 1405-spring c; 1406-lock cylinder d; 1407-spring d; 1408-socket; 1409-a connecting rod; 201-housing e; 202-a plug; 203-cartridge b; 204-gear a; 205-knob a; 206-knob b; 207-positioning rod; 208-a lead screw; 209-gear b.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in many ways other than those described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit of the invention, and therefore the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Embodiments, as shown in fig. 1-12, an anti-theft combination lock, comprising: a cylinder portion 1 and a key portion 2; the lock core part 1 and the key part 2 are matched for use; the lock core part 1 is adjusted in advance and is fixedly arranged in the lock; the code of the key part 2 can be manually adjusted to unlock the lock cylinder parts 1 with a plurality of different codes; the loss caused by multiple keys on the body is avoided or the key delay unlocking time is difficult to distinguish, so that the unlocking time is greatly saved and the loss caused by the loss of the key is avoided; the cylinder part 1 includes: the lock comprises a shell mechanism 11, a first lock cylinder mechanism 12, a password mechanism 13 and a second lock cylinder mechanism 14; the shell mechanism 11 is fixedly arranged in the lock; the first core locking mechanism 12 is fixedly arranged inside the shell mechanism 11 and is used for being matched with the code mechanism 13; the number of the password mechanisms 13 is five, the password mechanisms 13 are rotatably arranged inside the shell mechanism 11, the password mechanisms 13 are sleeved on the first core locking mechanism 12, and the five password mechanisms 13 can be rotatably adjusted to realize the password adjusting function; the second lock cylinder mechanism 14 is rotatably installed at the rear end of the shell mechanism 11, and the second lock cylinder mechanism 14 is matched with the shell mechanism 11 for use so as to complete unlocking; the combination of the plurality of password mechanisms 13 is a plurality of password combinations, so that the overall use scene is greatly increased; the second lock cylinder mechanism 14 greatly increases the difficulty of picking the lock and improves the safety.

In an alternative embodiment of the present embodiment, the housing means 11 comprises, apart from the same parts as in the previous embodiment: cylinder housing 1101 and housing card slot 1102; and the shell clamping groove 1102 is fixedly arranged on the right of the circular hole on the upper side of the lock cylinder shell 1101.

In an alternative embodiment of the present embodiment, the first core locking mechanism 12 includes, in addition to the same components as the previous embodiment: a shell a1201, a shell b1202, a lock cylinder a1203 and a spring a 1204; the shell a1201 is fixedly arranged in the lock cylinder shell 1101; the shell b1202 is fixedly installed inside the lock cylinder shell 1101 and is positioned at the upper end of the shell a1201, the shell b1202 and the shell a1201 form a key hole together, a plurality of round holes are formed inside the shell b1202, and the lock cylinder a1203 is installed in the round holes in a sliding mode; the spring a1204 is provided with a plurality of springs, the lower end of the spring a1204 is fixedly connected with the protrusion of the lock cylinder a1203, and the upper end of the spring a1204 is fixedly connected with the protrusion in the round hole of the shell b 1202.

In an alternative embodiment of the present invention, the combination mechanism 13 includes, in addition to the same components as the previous embodiment: a housing c1301, a lock cylinder b1302 and a spring b 1303; the shell c1301 is rotatably arranged inside the lock cylinder shell 1101, a plurality of round holes are formed in the shell c1301, and lock cylinders b1302 with different lengths are slidably arranged in the round holes to achieve a password effect; and a spring b1303 is arranged in each round hole in the shell c1301, one end of the spring b1303 is fixedly connected with a boss in the round hole in the shell c1301, and the other end of the spring b1303 is fixedly connected with a boss on the lock cylinder b 1302.

In an alternative embodiment of the present embodiment, the second cylinder mechanism 14 includes, in addition to the same components as the previous embodiment: lock 1401, casing d1402, lock cylinder c1403, lock block a1404, spring c1405, lock cylinder d1406, spring d1407, socket 1408 and link 1409; the lock 1401 is rotatably arranged at the rear end of the lock cylinder shell 1101; the outer shell d1402 is a hollow structure, and the outer shell d1402 is fixedly arranged on the left side of the upper end of the lock 1401; two cylinders at one end of a lock cylinder c1403 are slidably mounted in a round hole in a shell d1402, a spring is arranged on a left end fixing block of the lock cylinder c1403, and the spring is fixedly connected with the outer wall of the shell d 1402; a plurality of clamping blocks a1404 are provided, and round holes at two ends of the clamping blocks a1404 are slidably arranged on two cylinders on the lock cylinder c 1403; a spring c1405 is arranged at the right end of the clamping block a1404, one end of the spring c1405 is fixedly connected with the clamping block a1404, and the other end of the spring c1405 is fixedly connected with a protrusion of the lock cylinder c 1403; a plurality of locking columns d1406 are arranged, and the locking columns d1406 are slidably arranged in round holes formed in the shell d 1402; a spring d1407 is arranged on the upper side of the lock cylinder d1406, the lower end of the spring d1407 is fixedly connected with the lock cylinder d1406, and the upper end of the spring d1407 is fixedly connected with a bulge of a round hole of the shell d 1402; the outer sliding block of the socket 1408 is slidably arranged in the groove on the lock 1401, and the left end of the socket 1408 is provided with a cross groove; the round hole in the upper end of the connecting rod 1409 is rotatably arranged on the cylinder at one end of the lock cylinder c1403, the cylinder in the middle of the connecting rod 1409 is slidably arranged in the sliding groove arranged at the rear end of the lock 1401, and the sliding groove in the lower end of the connecting rod 1409 is slidably connected with the cylinder arranged at the rear end of the inserting hole 1408.

In an alternative embodiment of the invention, the key portion 2 comprises, apart from the same parts as in the previous embodiment: a shell e201, a plug 202, a fixture block b203, a gear a204, a knob a205, a knob b206, a positioning rod 207, a lead screw 208 and a gear b 209; the plug 202 is fixedly arranged at the right end of the shell e201, a cross block is arranged on the plug 202, and the cross block is matched with a cross groove on the socket 1408; a plurality of clamping blocks b203 are arranged, the clamping blocks b203 are rotatably arranged at one end inside the shell e201, and each clamping block b203 is mutually and rotatably connected; a gear a204 is arranged inside the fixture block b 203; the knob a205 is rotatably installed inside the shell e 201; the knob b206 is rotatably installed inside the shell e 201; the positioning rod 207 is fixedly arranged at the left end of the knob b206, and the lead screw 208 penetrates through a round hole of the knob b206 and is fixedly connected with the left end of the knob a 205; round holes on two sliding sides of the gear b209 are slidably mounted on the positioning rod 207, threads are arranged in the round hole in the middle of the gear b209, the threads are in threaded fit with the lead screw 208, and the gear b209 is meshed with the gear a 204.

The working principle is as follows:

when the lock cylinder is in a closed state, the shell c1301 is rotated through an opening on the lock cylinder shell 1101, so that round holes where lock cylinders b1302 with different lengths are located in the shell c1301 are aligned with a row of round holes on the lock cylinder shell 1101, and at the moment, the round holes on the inner side of the shell c1301 are also aligned with the round holes on the shell b 1202; the lock core is rotated to different values to realize the function of adjusting the password, and then the lock core is arranged in the lock; the application scenes of the lock cylinder are greatly increased, and the lock cylinder is convenient to adjust; further, each lock cylinder can have a unique password, and safety is greatly improved.

Before unlocking, the knob a205 needs to be manually twisted, the knob a205 rotates to drive the screw 208 to rotate, the screw 208 drives the gear b209 to move, and the knob a205 is rotated to control the position of the gear b209, so that the gear b209 is meshed with different gears a 204; when the gear b209 is adjusted to the position of the fixture block b203 to be adjusted, the knob b206 is rotated, the knob b206 drives the positioning rod 207 to rotate, the positioning rod 207 drives the gear b209 to rotate, the gear b209 drives the gear a204 to rotate, and the gear a204 drives the fixture block b203 to rotate, so that the fixture block b203 is adjusted to the desired password combination; the function of the automatic password adjustment of the key is realized, the operation is convenient, the use is simple, different passwords can be adjusted by one key to unlock different locks, and the convenience and the safety are greatly improved.

During unlocking, a key with an adjusted password is inserted into a round hole formed by the shell a1201 and the shell b1202, in the inserting process, the fixture block b203 abuts against the lock column a1203 and moves upwards against the elastic force of the spring a1204, the spring a1204 with different abutting heights is enabled to abut against the lock column b1302 with different heights due to different password positions of the fixture block b203, the spring a1204 with different heights abuts against the lock column b1302 to move upwards, and due to the adjusted password, the sum of the length of the lock column b1302 above the spring a1204 and the length of the spring a1204 is equal, and the password positions are matched; the lock cylinder b1302 jacks up the lock cylinder d1406 against the elastic force of the spring b1303, and the lock cylinder d1406 moves upwards against the elastic force of the spring d 1407; when the key is inserted to the bottom, the plug 202 is matched with the groove of the socket 1408, the plug 202 pushes the socket 1408 to move backwards, the socket 1408 enables the lock cylinder c1403 to move leftwards through the connecting rod 1409, the lock cylinder c1403 pushes the fixture block a1404 to move leftwards through the elastic force of the spring c1405, and each fixture block a1404 is clamped with all the lock cylinders d 1406; so that the lock cylinder d1406 will not move downwards any more; at this time, the key is rotated, the socket 1408 drives the lock 1401 to rotate, and the lock 1401 drives the lock cylinder d1406 to pass through the groove of the housing slot 1102 on the lock cylinder housing 1101, so as to complete the opening action; the function of opening of lock core has been realized, and the lock core part 1 of different passwords only allows to adjust the key part 2 of the password that lock core part 1 set up and just can open simultaneously, very big increase the security, and unique bilayer structure makes lock core part 1 can effectually prevent to pick the lock moreover, further increase the security.

Claims

1. An anti-theft combination lock, comprising: a lock cylinder portion (1) and a key portion (2); the lock core part (1) and the key part (2) are matched for use; the lock core part (1) is adjusted in advance and is fixedly arranged in the lock; the code of the key part (2) can be manually adjusted to unlock a plurality of lock cylinder parts (1) with different codes; the loss caused by multiple keys on the body is avoided or the key delay unlocking time is difficult to distinguish, so that the unlocking time is greatly saved and the loss caused by the loss of the key is avoided; the lock cylinder part (1) comprises: the lock comprises a shell mechanism (11), a first lock cylinder mechanism (12), a password mechanism (13) and a second lock cylinder mechanism (14); the shell mechanism (11) is fixedly arranged in the lock; the first lock core mechanism (12) is fixedly arranged in the shell mechanism (11) and is used for being matched with the code mechanism (13); the number of the code mechanisms (13) is five, the code mechanisms (13) are rotatably arranged in the shell mechanism (11), the code mechanisms (13) are sleeved on the first lock core mechanism (12), and the five code mechanisms (13) can be rotatably adjusted to realize the function of adjusting the codes; the second lock cylinder mechanism (14) is rotatably arranged at the rear end of the shell mechanism (11), and the second lock cylinder mechanism (14) is matched with the shell mechanism (11) for use so as to complete unlocking action; the combination of a plurality of password mechanisms (13) is a plurality of password combinations, so that the overall use scene is greatly increased; the second lock cylinder mechanism (14) greatly increases the difficulty of picking the lock and improves the safety;

the housing mechanism (11) comprises: a cylinder housing (1101) and a housing card slot (1102); the shell clamping groove (1102) is fixedly arranged on the right side of a circular hole on the upper side of the lock cylinder shell (1101);

the first core locking mechanism (12) comprises: a shell a (1201), a shell b (1202), a lock cylinder a (1203) and a spring a (1204); the shell a (1201) is fixedly arranged in the lock cylinder shell (1101); the shell b (1202) is fixedly arranged in the lock cylinder shell (1101) and is positioned at the upper end of the shell a (1201), the shell b (1202) and the shell a (1201) jointly form a key hole, a plurality of round holes are formed in the shell b (1202), and the lock cylinder a (1203) is arranged in the round holes in a sliding mode; the lower end of the spring a (1204) is fixedly connected with the protrusion of the lock column a (1203), and the upper end of the spring a (1204) is fixedly connected with the protrusion in the round hole of the shell b (1202);

the code mechanism (13) comprises: a housing c (1301), a lock cylinder b (1302) and a spring b (1303); the shell c (1301) is rotatably arranged inside the lock cylinder shell (1101), a plurality of round holes are formed in the shell c (1301), and lock cylinders b (1302) with different lengths are slidably arranged inside the round holes to achieve a password effect; a spring b (1303) is arranged in each round hole in the shell c (1301), one end of the spring b (1303) is fixedly connected with a boss in the round hole in the shell c (1301), and the other end of the spring b (1303) is fixedly connected with a boss on the lock cylinder b (1302);

said second cylinder mechanism (14) comprising: the lock comprises a lock catch (1401), a shell d (1402), a lock column c (1403), a clamping block a (1404), a spring c (1405), a lock column d (1406), a spring d (1407), a slot (1408) and a connecting rod (1409); the lock catch (1401) is rotatably arranged at the rear end of the lock cylinder shell (1101); the shell d (1402) is of a hollow structure, and the shell d (1402) is fixedly arranged on the left side of the upper end of the lock catch (1401); two cylinders at one end of a lock cylinder c (1403) are slidably mounted in a round hole in a shell d (1402), a spring is arranged on a left end fixing block of the lock cylinder c (1403), and the spring is fixedly connected with the outer wall of the shell d (1402); a plurality of clamping blocks a (1404) are arranged, and round holes at two ends of the clamping blocks a (1404) are slidably arranged on two cylinders on the lock cylinder c (1403); a spring c (1405) is arranged at the right end of the clamping block a (1404), one end of the spring c (1405) is fixedly connected with the clamping block a (1404), and the other end of the spring c (1405) is fixedly connected with the protrusion of the lock cylinder c (1403); a plurality of lock cylinders d (1406) are arranged, and the lock cylinders d (1406) are slidably installed in round holes formed in the shell d (1402); a spring d (1407) is arranged on the upper side of the lock column d (1406), the lower end of the spring d (1407) is fixedly connected with the lock column d (1406), and the upper end of the spring d (1407) is fixedly connected with a bulge of a round hole of the shell d (1402); the outer sliding block of the socket (1408) is slidably arranged in the groove on the lock catch (1401), and the left end of the socket (1408) is provided with a cross groove; a round hole at the upper end of a connecting rod (1409) is rotatably arranged on a cylinder at one end of a lock cylinder c (1403), the cylinder at the middle part of the connecting rod (1409) is slidably arranged in a chute arranged at the rear end of the lock catch (1401), and a chute at the lower end of the connecting rod (1409) is slidably connected with a cylinder arranged at the rear end of the inserting hole (1408);

the key part (2) comprises: the plug-in type automatic locking device comprises a shell e (201), a plug (202), a fixture block b (203), a gear a (204), a knob a (205), a knob b (206), a positioning rod (207), a lead screw (208) and a gear b (209); the plug (202) is fixedly arranged at the right end of the shell e (201), a cross block is arranged on the plug (202), and the cross block is matched with a cross groove on the socket (1408); a plurality of clamping blocks b (203) are arranged, the clamping blocks b (203) are rotatably arranged at one end in the shell e (201), and each clamping block b (203) is mutually and rotatably connected; a gear a (204) is arranged in the fixture block b (203); the knob a (205) is rotatably arranged inside the shell e (201); a knob b (206) is rotatably arranged inside the shell e (201); the positioning rod (207) is fixedly arranged at the left end of the knob b (206), and the lead screw (208) penetrates through a round hole of the knob b (206) and is fixedly connected with the left end of the knob a (205); round holes on two sliding sides of the gear b (209) are slidably mounted on the positioning rod (207), threads are arranged in the round hole in the middle of the gear b (209), the threads are in threaded fit with the screw rod (208), and the gear b (209) is meshed with the gear a (204).