CN111502435A - Chain lock - Google Patents

Abstract

The invention provides a chain lock, which is provided with an upper body, a lower body, a buckling seat, a lower fixed seat, an insertion rod, a compression spring, a lock core, a rotating body, a torsion spring, a lock rod, an upper fixed seat and a chain, wherein the upper body and the lower body are mutually buckled and pivoted, the buckling seat is arranged in the lower body, the lower fixed seat is arranged below the lower body, the lock core, the rotating body and the lock rod are mutually assembled, the torsion spring is arranged between the lock core and the rotating body, the lock core, the rotating body, the torsion spring and the lock rod are jointly arranged in the insertion rod, the compression spring is sleeved on the insertion rod, the insertion rod and the compression spring are jointly arranged in the upper body, the upper fixed seat is arranged above the upper body, one end of the chain is fixed in a fixed slot of the upper body through the insertion rod, the other end of the chain is inserted in a movable slot of the lower body, therefore, the locking action can be completed without using a key, when unlocking, the unlocking action can be completed only by rotating the lock core by the key, so that the lock catch is more convenient.

Description

chain lock

technical field

The present invention relates to a chain lock, in particular to an action of locking the lock without using a key. When unlocking, only the key is needed to rotate the lock core to complete the unlocking action, and the lock angle of the chain can be adjusted arbitrarily. .

Background technique

General chain locks are mainly used to lock items on fixed objects, such as: locking a bicycle on a column, while the traditional chain lock structure is connected by two ends of a chain, which can be locked together. The lock, which is a check lock or a padlock, mainly prevents the locked items from being moved to prevent the items from being stolen: However, the traditional chain lock, the lock and the chain are separated, and the lock is easy to lose, so Then there is a chain lock structure in which the lock and one end of the chain are buckled into one. As shown in Figures 1 and 2, a lock body 10 is mainly provided, and the lock body 10 is provided with a first slot 100 and a second slot 101 , a compression spring 11 and a lock core 12 are arranged in the lock body 10 , and an insertion lever 13 is arranged below the lock core 12 , and the bottom end of the insertion lever 13 can penetrate through the lock body 10 . In the two notches 101, one end of a chain 14 is fastened to the first notched groove 100 of the lock body 10 by means of a fixed bolt, and the other end of the chain 14 is inserted into the setting position by the insertion lever 13, and the insertion The lever 13 is inserted into the second slot 101 of the lock body 10 for locking, so that it is convenient to lock items and achieve the anti-theft effect. However, although the existing chain lock can prevent the lock body 10 and the chain 14 The separation is lost, but the opening positions of the first slot 100 and the second slot 101 on the lock body 10 are fixed (arranged in opposite directions) and cannot be adjusted. It is easy to lock the chain 14, and a key is required to rotate the lock cylinder 12 when unlocking and locking, so the convenience of use is still insufficient.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a chain lock, which can effectively solve the shortcomings of the existing chain locks in use.

The chain lock of the present invention includes:

an upper body, the upper body is provided with an accommodating groove, the wall surface of the accommodating groove is provided with at least one guide strip groove and a positioning strip groove, and the bottom of the upper body is provided with a through hole communicating with the accommodating groove , the wall surface of the upper body is provided with a fixing slot passing through the through hole, and the bottom ring of the upper body is provided with an inserting slot;

The lower body is pivoted below the upper body, the lower body is provided with a perforation, the wall surface of the lower body is provided with a movable slot communicated with the perforation, and the top edge of the perforation of the lower body protrudes with the upper body The rims of the grommets are mutually embedded, and the bottom surface of the movable slot is provided with a baffle in the through hole of the lower body;

a buckle seat is arranged in the through hole of the lower body, the buckle seat is provided with an insertion catch groove, and the wall surface of the insertion catch groove is provided with a locking ring groove;

A lower fixing seat is arranged below the lower body and the buckle seat, and the lower fixing seat is provided with an alcove;

An insertion lever is arranged in the accommodating groove of the upper body and extends through the through hole of the upper body and the through hole of the lower body. A container, the inner wall of the container is provided with a positioning ring groove, the wall surface of the lock seat is provided with a pin hole and a first steel ball hole, the pin hole is provided with a positioning pin, and the first steel ball hole is provided with a positioning steel ball , a lock lever groove connected to the chamber is arranged in the latch, the wall surface of the latch is provided with two second steel ball holes connected to the lock lever groove, and a lock is arranged in the second ball hole buckle steel ball;

a compression spring sleeved on the latch portion of the latch lever and disposed in the accommodating groove of the upper body;

A lock core is installed in the receptacle of the lock seat part of the push lever, the bottom of the lock core is provided with a rotating shaft, the bottom of the rotating shaft is provided with a concave hole, and the wall surface of the rotating shaft is provided with a long hole that communicates with the concave hole. Through the slot, a fixing pin is inserted into the long slot, the bottom surface of the lock core is provided with a socket, the top surface of the lock core is provided with a key socket, and the wall surface of the lock core is provided with a C-shaped buckle ring;

A swivel body is arranged below the lock core, the swivel body is provided with a through hole for the shaft of the lock core to be inserted into, an arc-shaped groove is arranged on the wall surface of the swivel body, and the wall surface of the swivel body is also provided with a The pin hole communicated with the through hole, the fixing pin of the lock core is passed through the pin hole of the swivel body, and the swivel body is provided with an insertion hole;

A torsion spring is arranged between the lock core and the swivel body, one end of the torsion spring is inserted into the socket on the bottom surface of the lock core, and the other end is inserted into the socket of the swivel body;

A lock lever is arranged below the swivel body, the top surface of the lock lever is provided with a convex body, the convex body is arranged in the concave hole of the lock core, and the convex body is provided with a pin hole opposite to the swivel body A positive pin hole, the fixing pin of the lock core is inserted into the pin hole of the lock rod, and the wall surface of the lower end of the lock rod is relatively provided with a groove;

an upper fixing seat, which is arranged above the upper body, and a through hole is provided on the upper fixing seat for the locking seat portion of the inserting lever to pass through;

One end of a chain is fixed in the fixed slot of the upper body, and the other end of the chain is inserted into the movable slot of the lower body.

In the chain lock of the present invention, the top surface of the upper body is provided with two screw holes, the upper fixing base is provided with two through holes, and a screw is passed through each of the two through holes of the upper fixing base, and the screws are screwed on the The screw holes of the upper body fix the upper fixing seat on the upper part of the upper body.

In the chain lock of the present invention, the bottom surface of the lower body is provided with two screw holes, the lower fixing base is provided with two through holes, and a screw is passed through each of the two through holes of the lower fixing base, and the screw is screwed on the lower fixing base. The screw hole of the lower body is used to fix the lower fixing seat under the lower body.

The chain lock of the present invention has the advantages that the locking angle of the chain can be automatically rotated according to the use space by virtue of the mutual locking pivot set of the upper body and the lower body, so that the locking is not limited by the space, and by virtue of the rotating body and the The setting of the torsion spring can be locked without using a key when locking, which has excellent convenience of use.

Description of drawings

FIG. 1 is a perspective view of a conventional chain lock.

FIG. 2 is a schematic diagram of the use of the existing chain lock when it is locked.

FIG. 3 is an exploded perspective view of an embodiment of the present invention.

FIG. 4 is a perspective combined view of an embodiment of the present invention.

FIG. 5 is a combined cross-sectional view (unlocked state view) of an embodiment of the present invention.

FIG. 6 is a combined cross-sectional view (unlocked state view) of another angle of the embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of the lock according to the embodiment of the present invention.

FIG. 8 is a schematic diagram of another cross-section of the lock according to the embodiment of the present invention.

FIG. 9 is a three-dimensional schematic diagram of the lock according to the embodiment of the present invention.

FIG. 10 is a schematic diagram of the use of the lower body and the upper body rotated by an angle according to the embodiment of the present invention.

Description of reference numerals: 1 chain lock; 10 lock body; 100 first slot; 101 second slot; 11 compression spring; 12 lock core; 13 insert lever; 14 chain; 2 upper body; 20 accommodation slot; 21 Guide strip slot; 22 Position strip slot; 23 Through hole; 24 Fixed slot; 25 Insert slot; 26 Screw hole; 27 Upper fixed seat; 270 Through hole; 31 active slot; 320 rim; 321 retaining edge; 33 screw hole; 34 snap seat; 340 insert slot; 341 locking ring slot; 35 lower fixing seat; 350 recess; 351 perforation; lever; 40 lock seat; 400 chamber; 401 positioning ring groove; 402 pin hole; 403 positioning pin; 404 first steel ball hole; 405 positioning steel ball; ;412 steel balls for locking; 5 compression springs; 6 lock cores; 60 shafts; 600 concave holes; 601 long through grooves; 61 fixed pins; 62 sockets; 63 key sockets; ;651 arc groove; 652 pin hole; 653 jack; 66 torsion spring; 660 one end; 661 the other end; 67 locking lever; 670 convex body; 671 pin hole; one end.

Detailed ways

In order to achieve the above-mentioned purpose of use and effect of the present invention, the technical means adopted are hereby citing preferable feasible embodiments, and shown in the drawings, detailed as follows:

Referring to FIGS. 3 to 5 , the embodiment of the present invention is mainly provided with an upper body 2 , the upper body 2 is provided with an accommodating groove 20 , and at least one guiding strip groove is provided on the wall surface of the accommodating groove 20 21 and a positioning groove 22, the bottom of the upper body 2 is provided with a through hole 23 communicating with the accommodating groove 20, the wall surface of the upper body 2 is provided with a fixing slot 24 passing through the through hole 23, the The bottom of the upper body 2 is provided with a slot 25, and the top surface of the upper body 2 is provided with two screw holes 26; The wall surface of 3 is provided with a movable slot 31 which communicates with the through hole 30, a top edge of the through hole 30 is protruded with a rim 320, and a baffle 321 is arranged on the bottom surface of the movable slot 31 in the through hole 30. The The bottom surface of the lower body 3 is provided with at least two screw holes 33 ; a buckle seat 34 is arranged in the through hole 30 of the lower body 3 , and the buckle seat 34 is provided with an insertion slot 340 , and the wall of the insertion slot 340 is A locking ring groove 341 is provided; a lower fixing seat 35 is arranged below the lower body 3 and the buckle seat 34 , and the lower fixing seat 35 is provided with a recess 350 and at least two through holes 351 , which are inside the at least two through holes 351 A screw 352 is respectively penetrated; an insertion lever 4 is arranged in the accommodating slot 20 of the upper body 2 and extends through the through hole 23 and the through hole 30 of the lower body 3, and the insertion lever 4 is set as a lock seat The lock seat 40 is provided with a chamber 400, the inner wall of the chamber 400 is provided with a positioning ring groove 401, the wall of the lock seat 40 is provided with a pin hole 402, the pin hole 402 A positioning pin 403 is arranged inside, and a first steel ball hole 404 is arranged on the wall surface of the lock seat portion 40 . 400 of the locking rod slot 410, the wall surface of the latching part 41 is provided with two second steel ball holes 411 connected to the locking rod groove 410, and two second steel ball holes 411 are each provided with a locking steel ball 412; one A compression spring 5 is sleeved on the latching portion 41 of the latching lever 4 and is arranged in the accommodating groove 20 of the upper body 2 ; a lock core 6 is mounted on the locking seat portion 40 of the latching lever 4 In the chamber 400, the bottom of the lock core 6 is provided with a rotating shaft 60, the bottom of the rotating shaft 60 is provided with a concave hole 600, the wall surface of the rotating shaft 60 is provided with a long through groove 601 communicating with the concave hole 600, a fixing pin 61 is set in the long through slot 601, the bottom surface of the lock core 6 is provided with a socket 62, the top surface of the lock core 6 is provided with a key socket 63, and the wall surface of the lock core 6 is provided with a C-shaped buckle Ring 64; a swivel 65, located below the lock core 6, the swivel 65 is a stepped convex body, the swivel 65 is provided with a through hole 650, and the wall of the swivel 65 is provided with an arc-shaped groove 651, the wall surface of the rotating body 65 is further provided with a pin hole 652 communicating with the through hole 650, the rotating body 65 is provided with a socket 653; time, one end 6 of the torsion spring 66 60 is inserted into the socket 62 on the bottom surface of the lock core 6, and the other end 661 is inserted into the socket 653 of the swivel 65; A convex body 670 is provided, the convex body 670 is arranged in the concave hole 600 of the lock core 6, the convex body 670 is provided with a pin hole 671, and the wall surface of the lower end of the locking rod 67 is oppositely provided with a groove 672; a The upper fixing seat 27 is located above the upper body 2 . The upper fixing seat 27 is provided with a through hole 270 and two through holes 271 , and a screw 272 is passed through each of the two through holes 271 ; a chain 7 is fixed at one end 70 The other end 71 of the chain 7 is arranged in the fixed slot 24 of the upper body 2 and the other end 71 of the chain 7 is arranged in the movable slot 31 of the lower body 3 . Thus, it is a chain lock structure.

When assembling, please refer to FIGS. 3 to 6 , set the buckle seat 34 in the through hole 30 under the lower body 3 , so that the buckle seat 34 is blocked and positioned by the baffle 321 in the through hole 30 , and then the lower The fixing base 35 is assembled under the lower body 3 , so that the bottom of the buckle base 34 is set in the recess 350 of the lower fixing base 35 , and is screwed by means of the screw 352 passing through the hole 351 of the lower fixing base 35 In the screw hole 33 of the lower body 3, the buckle seat 34 is fixed in the lower through hole 30 of the lower body 3, and the lower fixing seat 35 is fixed under the lower body 3, and the upper body 2 is assembled. Above the lower body 3, by virtue of the rim 320 on the top surface of the lower body 3 and the insert groove 25 on the bottom surface of the upper body 2 (as shown in Figures 5 and 6), the lower body 3 is pivoted to the upper body 2. The bottom of the torsion spring 66 can be rotated, and one end 660 of the torsion spring 66 is inserted into the socket 62 on the bottom surface of the lock core 6, and the other end 661 of the torsion spring 66 is inserted into the socket 653 of the rotating body 65, so that the torsion spring 66 is set Between the lock core 6 and the swivel body 65, set the shaft 60 of the lock core 6 into the through hole 650 of the swivel body 65, and then set the convex body 670 of the lock rod 67 into the concave hole 600 of the lock core 6 , by virtue of the fixing pin 61 passing through the long slot 601 of the lock core 6 and the pin hole 652 of the swivel body 65 and the pin hole 671 of the lock rod 67, the lock core 6, the swivel body 65 and the lock rod 67 are integrated into one, Then, the lock core 6, the swivel body 65, the torsion spring 66 and the lock rod 67 are set together in the chamber 400 and the lock rod groove 410 of the insertion lever 4, and the C-shaped buckle 64 of the lock core 6 is embedded in the lock rod 410. In the positioning ring groove 401 of the insert lever 4, the lock core 6, the swivel body 65, the torsion spring 66 and the lock lever 67 are positioned in the insert lever 4 and will not come out. Set in the chamber 400 of the lock base 40 , and set the positioning pin 403 into the pin hole 402 of the lock base 40 , and the arc groove 651 of the swivel 65 is aligned with the first groove of the lock base 40 . A steel ball hole 404 is located, and the positioning steel ball 405 is set in the first steel ball hole 404 of the lock seat portion 40. A part of the positioning steel ball 405 is located in the arc groove 651 of the rotating body 65, and the torsion spring 66 is The lock core 6 and the swivel body 65 are twisted to have a twisting force, and the two locking steel balls 412 are respectively set in the two second steel ball holes 411 of the inserting catch 41 , and the slot 672 of the locking rod 67 is aligned with the The position of the second steel ball hole 411 of the insertion lever 4 enables a part of the locking steel ball 412 to be located in the slot 672 of the locking lever 67, and then the compression spring 5 is sleeved on the insertion lever 41 of the insertion lever 4. Set one end 70 of the chain 7 into the fixing slot 24 of the upper body 2, and then set the inserting lever 4 into the accommodating slot 20 and the through hole 23 of the upper body 2, and the lower end of the compression spring 5 touches the Hold on the bottom surface of the accommodating slot 20 , the upper end of the compression spring 5 abuts against the bottom surface of the lock seat portion 40 of the insertion lever 4 , and the outer end of the positioning pin 403 on the wall surface of the lock seat portion 40 of the insertion lever 4 Then it is set in the guide groove 21 of the upper body 2, so that the insertion lever 4 cannot be inserted into the upper body. The main body 2 can only be moved up and down by rotating inward, and the latching portion 41 of the latching lever 4 is stretched through the through hole 23 of the upper body 2 and one end 70 of the chain 7, so that the latching portion 41 of the latching lever 4 pushes the chain. One end 70 of 7 is fixed in the fixing slot 24 of the upper body 2, and then the upper fixing seat 27 is arranged on the upper part of the upper body 2, and the two screws 272 are respectively passed through the two holes 271 of the upper fixing seat 27 and screwed into the upper body 27. Inside the two screw holes 26 of the upper body 2 , the locking seat portion 40 of the insertion lever 4 protrudes from the through hole 270 of the upper fixing seat 27 , so that the whole assembly can be completed.

When in use, please refer to FIGS. 4 to 10 , thread the chain 7 of the present invention around the object to be locked, such as the frame or wheel of a bicycle, and then insert the other end 71 of the chain 7 into the bottom. In the movable slot 31 of the main body 3, the other end 71 of the chain 7 is aligned with the through hole 23 of the upper main body 2 and the position of the insertion slot 340 of the buckle seat 34 provided in the lower main body 3 (Fig. 4-Fig. 6), and then press the locking seat portion 40 of the insertion lever 4 protruding above the upper body 2 into the upper body 2 (as shown in Figures 7-9), and the insertion lever 4 faces the upper body 2, the positioning pin 403 on the insertion lever 4 moves in the guide groove 21 of the upper body 2, and the positioning steel ball 405 also moves with the insertion lever 4, and the to-be-positioned steel ball 405 moves to the positioning of the upper body 2 When the groove 22 is placed, the positioning steel ball 405 is no longer held against the wall of the accommodating groove 20 of the upper body 2 , so that the positioning steel ball 405 can move into the positioning groove 22 of the upper body 2 and is no longer located in the arc of the swivel 65 In the groove 651, at this time, the torsion spring 66 is elastically restored to drive the rotating body 65 to rotate, so that the wall surface of the rotating body 65 pushes the positioning steel ball 405 to move outward, so that the part of the positioning steel ball 405 can be protruded outwardly in the groove 651. In the positioning bar groove 22 of the upper body 2 , the insertion lever 4 moves into the upper body 2 and presses the compression spring 5 , so that the compression spring 5 is in an elastically compressed state and penetrates into the through hole 23 of the upper body 2 The lower end of the latch portion 41 of the latch lever 4 is inserted into the other end 71 of the chain 7 and inserted into the latch slot 340 of the latch seat 34 in the lower body 3. The latch on the latch lever 4 The steel ball 412 is aligned with the locking ring groove 341 of the buckle seat 34 in the lower body 3, and the rotating body 65 is driven to rotate by the elastic recovery of the torsion spring 66, and the lower locking rod 67 also rotates accordingly. The slot 672 of 67 is rotated away from the second steel ball hole 411 of the insertion lever 4, and the wall of the locking lever 67 pushes the two locking steel balls 412 outward, so that a part of the locking steel ball 412 protrudes outward from the insertion lever. 4 and is embedded in the lock ring groove 341 of the buckle seat 34 (as shown in FIG. 8 ), so that the locking action can be completed without using a key, which is very convenient when locking; The one end 70 of the chain 7 is directly fixed in the fixing slot 24 of the upper body 2, which can reduce the lateral volume of the lock body. The other end 71 of the chain 7 is firmly locked in the movable slot 31 of the lower body 3 (as shown in Figures 7 and 8 ), which has excellent anti-theft effect, and the lower body 3 of the present invention is designed to be connected to the upper body The bottom of 2 is rotated at any angle, and the user can adjust the relative locking angle of the movable slot 31 on the lower body 3 and the fixed slot 24 of the upper body 2 according to the space of the locking object (as shown in Fig. 9 and Fig. 10), so that when the object is locked, the locking action will not be unable to be completed due to space constraints, which is more convenient in use.

When the key is to be unlocked, it is only necessary to insert the key into the key hole 63 of the lock core 6, so that the key drives the rotation shaft 60 of the lock core 6 to rotate, and the rotation shaft 60 of the lock core 6 and the rotating body 65 and the lock rod 67 are linked together. Rotate and twist the torsion spring 66 with a torsion force, the slot 672 of the locking lever 67 is aligned with the position of the second steel ball hole 411 of the insert lever 4 again, and is embedded in the locking ring groove 341 of the buckle seat 34 Since the inner locking steel ball 412 is no longer pressed by the outer wall of the locking rod 67, it can move inwardly into the second steel ball hole 411 of the inserting lever 4 and the slot 672 of the locking rod 67, and is no longer embedded in the lock rod 67. Inside the locking ring groove 341 of the buckle seat 34 , the arc-shaped groove 651 of the swivel body 65 is aligned with the position of the first steel ball hole 404 of the insertion lever 4 again, so that the positioning steel ball 405 can be directed to the arc-shaped groove 651 moving inward, and no longer clamped in the positioning bar groove 22 of the upper body 2, while the compression spring 5 set in the accommodating groove 20 of the upper body 2 will elastically return to push the insertion lever 4 upward (as shown in FIG. 5 ). shown), the upper part of the lock seat part 40 protrudes outward on the upper fixed seat 27, and the insertion lever 4 is pushed up by the compression spring 5 and disengaged from the lower body 3 and the insertion lock slot 340 of the buckle seat 34 and the other end 71 of the chain 7, the other end 71 of the chain 7 can be taken out from the movable slot 31 of the lower body 3, so that the unlocking action can be completed, and the present invention is not limited by the size of the locking space. , which makes the locking object more convenient, can be used for locking and positioning of any object, and has excellent anti-theft effect.

The above description is only illustrative rather than restrictive for the present invention. Those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the claims. All will fall within the protection scope of the present invention.

Claims (3)

1. A chain lock, comprising:

the upper body is provided with a containing groove, the wall surface of the containing groove is provided with at least one guide strip groove and one positioning strip groove, the bottom of the upper body is provided with a through hole communicated with the containing groove, the wall surface of the upper body is provided with a fixed slot communicated with the through hole, and the bottom of the upper body is annularly provided with an embedded groove;

the lower body is pivoted below the upper body and provided with a through hole, the wall surface of the lower body is provided with a movable slot communicated with the through hole, the top edge of the through hole of the lower body is convexly provided with an embedded edge mutually embedded with the embedded slot of the upper body, and the bottom surface of the movable slot in the through hole of the lower body is provided with a blocking edge;

a fastening seat arranged in the through hole of the lower body, wherein the fastening seat is provided with an inserting groove, and the wall surface of the inserting groove is provided with a locking ring groove;

a lower fixing seat arranged below the lower body and the buckling seat, wherein the lower fixing seat is provided with a concave chamber;

the inserting and pulling rod is arranged in the containing groove of the upper body and penetrates through the through hole of the upper body and the through hole of the lower body, the inserting and pulling rod is arranged into a lock seat part and an inserting and pulling part, a containing chamber is arranged in the lock seat part, a positioning ring groove is arranged on the inner wall of the containing chamber, a pin hole and a first steel ball hole are arranged on the wall surface of the lock seat part, a positioning pin is arranged in the pin hole, a positioning steel ball is arranged in the first steel ball hole, a lock rod groove communicated with the containing chamber is arranged in the inserting and pulling part, two second steel ball holes communicated with the lock rod groove are arranged on the wall surface of the inserting and pulling part, and a lock catch steel ball is arranged in the second steel ball hole;

a compression spring, which is sleeved on the inserting part of the inserting rod and is arranged in the containing groove of the upper body;

the lock core is arranged in the containing chamber of the lock seat part of the inserting rod, the bottom of the lock core is provided with a rotating shaft, the bottom of the rotating shaft is provided with a concave hole, the wall surface of the rotating shaft is provided with a long through groove communicated with the concave hole, a fixed pin is arranged in the long through groove in a penetrating way, the bottom surface of the lock core is also provided with an insertion hole, the top surface of the lock core is provided with a key insertion hole, and the wall surface of the lock core is buckled with a C-shaped buckle ring;

the rotating body is arranged below the lock core, a through hole for the rotating shaft of the lock core to be arranged is formed in the rotating body, an arc-shaped groove is formed in the wall surface of the rotating body, a pin hole communicated with the through hole is further formed in the wall surface of the rotating body, the fixing pin of the lock core is arranged in the pin hole of the rotating body in a penetrating mode, and a jack is formed in the rotating body;

the torsion spring is arranged between the lock core and the rotating body, one end of the torsion spring is inserted into the jack on the bottom surface of the lock core, and the other end of the torsion spring is inserted into the jack on the rotating body;

the locking rod is arranged below the rotating body, the top surface of the locking rod is provided with a convex body, the convex body is arranged in a concave hole of the lock core, the convex body is provided with a pin hole which is aligned with the pin hole of the rotating body, the fixing pin of the lock core is arranged in the pin hole of the locking rod in a penetrating way, and the wall surface of the lower end part of the locking rod is relatively provided with a cutting groove;

the upper fixing seat is arranged above the upper body and is provided with a through hole for the lock seat part of the inserting rod to penetrate through;

one end of the chain is fixedly arranged in the fixed slot of the upper body, and the other end of the chain is inserted in the movable slot of the lower body.

2. The chain lock as claimed in claim 1, wherein the top surface of the upper body has two screw holes, the upper fixing base has two through holes, and a screw is inserted into each of the two through holes of the upper fixing base and screwed into the screw hole of the upper body.

3. The chain lock as claimed in claim 1, wherein the bottom surface of the lower body is provided with two screw holes, the lower fixing base is provided with two through holes, and a screw is inserted into each of the two through holes of the lower fixing base and is screwed into the screw hole of the lower body.

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