TW202132151A - Chain lock - Google Patents

Abstract

※ English abstract will be filed later.

Description

Chain lock

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

According to the general chain lock, it is mainly used to lock things on a fixed object, for example: to lock a bicycle on a pillar, while the traditional chain lock structure is connected by a chain with two ends that can lock each other. Locks together, and the lock is a matching lock or padlock, mainly to prevent the locked items from being moved to prevent the items from being stolen: Of course, the traditional chain lock, the lock and the chain are separated, The lock is easy to lose, so there is a chain lock structure in which the lock and one end of the chain are buckled together. As shown in the first and second figures, a lock body 10 is mainly provided with a first cut groove 100 And a second notch 101, a compression spring 11 and a lock core 12 are arranged in the lock body 10, the lower part of the lock core 12 is provided with an inserting lever 13, and the bottom end of the inserting lever 13 can be Extending in the second slot 101 of the lock body 10, one end of a chain 14 is fixed in the first slot 100 of the lock body 10 with a fixing bolt, and the other end of the chain 14 is inserted by the inserting bolt. The latch lever 13 is inserted into the set position, and the latch lever 13 is inserted into the second cut groove 101 of the lock body 10 to be locked. In this way, it is convenient to lock items and achieve the anti-theft effect. However, the conventional chain lock It can prevent the lock body 10 and the chain 14 from being separated and lost, but the opening positions of the first cut groove 100 and the second cut groove 101 on the lock body 10 are fixed (reversely arranged) and cannot be adjusted. It is not easy to lock the chain 14 if the space is restricted when buckling, and a key is needed to rotate the lock core 12 when unlocking and locking, so the convenience of use is still insufficient.

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

The chain lock of the present invention includes: An upper body, the upper system is provided with an accommodating groove, the wall of the accommodating groove is provided with at least one guide bar groove and a positioning bar groove, and the bottom of the upper body is provided with a communication communicating with the accommodating groove A hole is provided on the wall surface of the upper body with a fixing slot penetrating the through hole, and the bottom ring of the upper body is provided with an embedding groove; The lower body is pivoted below the upper body, the lower body is provided with a through hole, the wall of the lower body is provided with a movable slot communicating with the through hole, and the top edge of the through hole of the lower body is protruding from the upper body. The embedding edges of the embedding grooves of the main body are embedded with each other, and the bottom surface of the movable slot is provided with a retaining edge in the perforation of the lower body; A buckle seat is set in the perforation of the lower body, the buckle seat is provided with an inserting groove, and the wall of the inserting groove is provided with a locking ring groove; The lower fixing seat is set under the lower body and the buckling seat, and the lower fixing seat is provided with a recess; A plug-in lever is set in the accommodating slot of the upper body and extends through the through hole and the perforation of the lower body. The plug-in lever is set as a lock base part and a plug-in part, and the lock base part is provided with There is a chamber, a positioning ring groove is arranged on the inner wall of the 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, and a positioning pin is arranged in the first steel ball hole. Steel ball, the plug part is provided with a lock rod groove connected to the chamber, the wall of the plug part is provided with two second steel ball holes connected to the lock rod groove, and the second steel ball hole is provided with Lock steel ball; A compression spring is sleeved on the inserting part of the inserting lever and is arranged in the accommodating groove of the upper body; A lock core is set in the accommodating chamber of the lock seat part of the latch, the bottom of the lock core is provided with a shaft, the bottom of the shaft is provided with a concave hole, and the wall of the shaft is provided with a hole connected to the concave hole A fixed pin is inserted through the long through groove, the bottom surface of the lock core is provided with a hole, the top surface of the lock core is provided with a key hole, and the wall surface of the lock core is buckled with a hole C-shaped buckle; A swivel is located below the lock core, the swivel is provided with a perforation for the shaft of the lock core to be inserted, the wall of the swivel is provided with an arc-shaped groove, and the wall of the swivel is additionally provided There is a pin hole connected to the perforation, the fixing pin of the lock core passes through the pin hole of the rotating body, and a hole is provided on the rotating body; A torsion spring is arranged between the lock core and the rotating 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 rotating body; A lock rod is arranged below the rotating body, the top surface of the lock rod is provided with a convex body, the convex system is arranged in the concave hole of the lock core, and the convex body is provided with a pin hole with the rotating body A relatively positive pin hole, the fixing pin of the lock core is inserted in the pin hole of the lock lever, and the wall surface of the lower end of the lock lever is provided with a groove opposite; An upper fixing seat is arranged above the upper body, and the upper fixing seat is provided with a through hole for the lock seat part of the plug lever to pass through; One end of a chain is fixedly arranged 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 seat is provided with two perforations, and each of the two perforations of the upper fixing seat is provided with a screw, and the screw is screwed in The screw hole of the upper body fixes the upper fixing seat above the upper body.

The chain lock of the present invention, wherein the bottom surface of the lower body is provided with two screw holes, the lower fixing seat is provided with two perforations, and each of the two perforations of the lower fixing seat is provided with a screw, and the screw is screwed on the The screw hole of the lower body fixes the lower fixing seat under the lower body.

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

Regarding the technical means adopted by the present invention in order to achieve the above-mentioned purposes and effects, a preferred and feasible embodiment is presented, and shown in the drawings, and the details are as follows:

The embodiment of the present invention, please refer to the third to fifth figures, is mainly provided with an upper body 2, the upper body 2 is provided with an accommodating groove 20, the accommodating groove 20 is provided with at least one guide on the wall surface A slot 21 and a positioning slot 22. The bottom of the upper body 2 is provided with a through hole 23 communicating with the accommodating groove 20, and the wall of the upper body 2 is provided with a fixing slot 24 penetrating through the through hole 23 , The bottom of the upper body 2 is provided with an embedding groove 25, the top surface of the upper body 2 is provided with two screw holes 26; the lower body 3 is set below the upper body 2, and the lower body 3 is provided with a through hole 30, The wall surface of the lower body 3 is provided with a movable slot 31 connected to the through hole 30, the top edge of the through hole 30 is convexly provided with a caulking edge 320, and the bottom surface of the movable slot 31 is provided with a retaining edge in the through hole 30 321. The bottom surface of the lower body 3 is provided with at least two screw holes 33; a buckle seat 34 is set in the through hole 30 of the lower body 3, and the buckle seat 34 is provided with an inserting groove 340, the inserting groove A locking ring groove 341 is provided on the wall surface of 340; a lower fixing seat 35 is arranged below the lower body 3 and the buckling seat 34, the lower fixing seat 35 is provided with a recess 350 and at least two through holes 351, the At least two through holes 351 are respectively penetrated with a screw 352; an insertion lever 4 is set 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. The rod 4 is provided with a lock seat portion 40 and a plug-in portion 41. The lock seat portion 40 is provided with a chamber 400, the inner wall of the chamber 400 is provided with a positioning ring groove 401, and the wall of the lock seat portion 40 is provided with a pin A locating pin 403 is provided in the pin hole 402, a first steel ball hole 404 is provided on the wall surface of the lock seat portion 40, and a positioning steel ball 405 is provided in the first steel ball hole 404. A lock rod groove 410 connected to the chamber 400 is provided. The wall surface of the plug portion 41 is provided with two second steel ball holes 411 connected to the lock rod groove 410. Each of the two second steel ball holes 411 is provided with There is a lock steel ball 412; a compression spring 5, which is sleeved on the insertion portion 41 of the insertion lever 4 and is set in the receiving groove 20 of the upper body 2; and a lock core 6 is set in the In the chamber 400 of the lock seat portion 40 of the latch lever 4, 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, and the wall of the rotating shaft 60 is provided with a hole connected to the concave hole 600 long through slot 601, a fixed pin 61 is set in the long through slot 601, the bottom surface of the lock core 6 is provided with a hole 62, the top surface of the lock core 6 is provided with a key hole 63, the lock A C-shaped buckle 64 is buckled on the wall of the core 6; a rotating body 65 is arranged below the lock core 6. The rotating body 65 is a stepped convex body, and the rotating body 65 is provided with a perforation 650, The wall surface of the rotating body 65 is provided with an arc-shaped groove 651, the wall surface of the rotating body 65 is additionally provided with a pin hole 652 connected to the through hole 650, and the rotating body 65 is provided with a socket 653; a torsion spring 66, is set between the lock core 6 and the rotating body 65 One end 660 of the torsion spring 66 is inserted into the insertion hole 62 on the bottom surface of the lock core 6, and the other end 661 is inserted into the insertion hole 653 of the rotating body 65; a lock rod 67 is arranged on the rotating body 65 Below, the top surface of the lock rod 67 is provided with a convex body 670, 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, the lower end of the lock rod 67 The wall surface is oppositely provided with grooves 672; an upper fixing seat 27 is arranged above the upper body 2, the upper fixing seat 27 is provided with a through hole 270 and two perforations 271, each of the two perforations 271 penetrates There is a screw 272; a chain 7, one end 70 of which is fixed in the fixed slot 24 of the upper body 2, and the other end 71 of the chain 7 is set in the movable slot 31 of the lower body 3. In this way, that is It is a chain lock structure.

When assembling, please refer to the third to sixth figures, set the buckle seat 34 in the perforation 30 under the lower body 3, so that the buckle seat 34 is blocked and positioned by the retaining edge 321 in the perforation 30, and then the lower body The fixing base 35 is assembled under the lower body 3, so that the bottom of the buckling base 34 is set in the recess 350 of the lower fixing base 35, and is screwed by the screw 352 inserted in the through hole 351 of the lower fixing base 35. Set in the screw hole 33 of the lower body 3, the buckle seat 34 is fixed in the lower perforation 30 of the lower body 3, and the lower fixing seat 35 is fixed under the lower body 3, and the upper body 2 sets Located above the lower body 3, the lower body 3 is pivoted on the upper body by the embedding edge 320 on the top surface of the lower body 3 and the embedding groove 25 on the bottom surface of the upper body 2 (as shown in Figures 5 and 6) The bottom of the body 2 can be rotated. In addition, one end 660 of the torsion spring 66 is inserted into the insertion hole 62 of the bottom surface of the lock core 6, and the other end 661 of the torsion spring 66 is inserted into the insertion hole 653 of the rotating body 65, so that the torsion spring 66 is set between the lock core 6 and the rotating body 65, and the shaft 60 of the lock core 6 is inserted into the perforation 650 of the rotating body 65, and then the convex body 670 of the lock rod 67 is inserted into the concave hole of the lock core 6 In 600, the lock core 6, the rotating body 65 and the lock rod 67 are combined by the fixing pin 61 passing through the long through slot 601 of the lock core 6 and the pin hole 652 of the rotating body 65 and the pin hole 671 of the lock rod 67 As a whole, the lock core 6, the rotating body 65, the torsion spring 66 and the lock rod 67 are set in the chamber 400 of the latch lever 4 and the lock rod groove 410 together, and the C-shaped buckle ring 64 of the lock core 6 is inserted Set in the positioning ring groove 401 of the plug lever 4, the lock core 6, the rotating body 65, the torsion spring 66 and the lock rod 67 are positioned in the plug lever 4 and will not fall out. The lock core 6 and the torsion spring 66 and the rotation The body 65 is arranged in the chamber 400 of the lock seat part 40, and the positioning pin 403 is arranged in the pin hole 402 of the lock seat part 40, and the arc-shaped groove 651 of the rotating body 65 is aligned with the lock seat part. The first steel ball hole 404 of 40 is located, and the positioning steel ball 405 is placed in the first steel ball hole 404 of the lock seat part 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 twisted by the lock core 6 and the rotating body 65 to have a torsion force, and the two lock steel balls 412 are respectively set in the second steel ball holes 411 of the plug portion 41, and the notch 672 of the lock rod 67 is Align the second steel ball hole 411 of the latch lever 4 so that a part of the lock steel ball 412 can be located in the slot 672 of the lock lever 67, and then the compression spring 5 is sleeved on the latch portion 41 of the latch lever 4 On the top, another end 70 of the chain 7 is placed in the fixing slot 24 of the upper body 2, and then the insertion lever 4 is placed in the accommodating groove 20 and the through hole 23 of the upper body 2, and the lower end of the compression spring 5 The upper end of the compression spring 5 is against the bottom surface of the lock seat 40 of the latch lever 4, and the positioning pin 403 on the wall of the lock seat 40 of the latch lever 4 The outer end is set in the guide groove 21 of the upper body 2, so that the latch lever 4 cannot be placed on the The main body 2 rotates and can only move up and down. The plug 41 of the plug lever 4 penetrates through the through hole 23 of the upper body 2 and one end 70 of the chain 7, so that the plug 41 of the plug lever 4 connects the chain One end 70 of 7 is fixed in the fixing slot 24 of the upper body 2, and then the upper fixing base 27 is arranged above the upper body 2, and two screws 272 are respectively inserted through the two through holes 271 of the upper fixing base 27 and screwed in Inside the two screw holes 26 of the upper body 2, the lock seat portion 40 of the latch lever 4 protrudes from the through hole 270 of the upper fixing seat 27, so that the entire assembly can be completed.

When in use, please refer to Figures 4 to 10, and thread the chain 7 of the present invention on 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 body 3, the other end 71 of the chain 7 is aligned with the through hole 23 of the upper body 2 and the position of the insertion slot 340 of the buckle seat 34 provided in the lower body 3 (such as fourth to sixth As shown in the figure), then press the lock seat portion 40 of the latch lever 4 protruding above the upper body 2 into the upper body 2 (as shown in the seventh to ninth pictures), and the latch lever 4 faces the upper body 2, the positioning pin 403 on the latch lever 4 moves in the guide groove 21 of the upper body 2, and the positioning steel ball 405 also moves with the latch lever 4, and the positioning steel ball 405 moves to the positioning of the upper body 2. When the groove is 22, the positioning steel ball 405 is no longer resisted by the wall surface 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 in the arc shape of the rotating body 65 In the groove 651, at this time, the torsion spring 66 elastically returns 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, and the part of the positioning steel ball 405 can be projected outwardly. 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 elastic compression state and penetrates into the through hole 23 of the upper body 2 The lower end of the latch 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 buckle seat 34 in the lower body 3, and the latch on the latch lever 4 is inserted The steel ball 412 is aligned with the lock 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 lock rod 67 also rotates, the lock rod The cut groove 672 of 67 is rotated away from the second steel ball hole 411 of the plunger 4, and the wall surface of the lock rod 67 pushes the two lock steel balls 412 outward, so that a part of the lock steel ball 412 protrudes out of the plunger. 4 and embedded in the locking ring groove 341 of the buckle seat 34 (as shown in the eighth figure), so that the locking action can be completed without the use of a key, which is very convenient when locking; The rod 4 directly fixes one end 70 of the chain 7 in the fixing slot 24 of the upper body 2, which can reduce the lateral volume of the lock body. In addition, the locking steel ball 412 is embedded in the setting position and the latching rod 4 is inserted into the buckle. The other end 71 of the chain 7 can be firmly locked in the movable slot 31 of the lower body 3 (as shown in Figures 7 and 8), which has an excellent anti-theft effect, and the body 3 of the present invention can be designed in The bottom of the upper body 2 can be rotated at any angle. 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 (such as the ninth , As shown in the ten figure), when the object is locked, it will not be unable to complete the locking action due to space constraints, which is more convenient in use.

When you want to unbuckle, you only need to insert the key into the key socket 63 of the lock core 6, so that the key drives the shaft 60 of the lock core 6 to rotate, and the shaft 60 of the lock core 6 rotates in conjunction with the rotating body 65 and the lock rod 67. , And the torsion spring 66 has a torsion force, and the notch 672 of the lock rod 67 is again aligned with the position of the second steel ball hole 411 of the latch lever 4, and is embedded in the buckle ring groove 341 of the buckle seat 34 Since the lock steel ball 412 is no longer resisted by the outer wall of the lock rod 67, it can move inward to the second steel ball hole 411 of the latch lever 4 and the cut groove 672 of the lock rod 67, and is no longer embedded in the buckle. In the locking ring groove 341 of the socket 34, the arc groove 651 of the rotating body 65 is again aligned with the position of the first steel ball hole 404 of the plunger 4, so that the positioning steel ball 405 can be moved into the arc groove 651 Move, it is no longer stuck in the positioning groove 22 of the upper body 2, and at the same time, the compression spring 5 arranged in the accommodating groove 20 of the upper body 2 returns elastically to push the insertion lever 4 upward (as shown in the fifth figure). As shown), the upper part of the lock seat portion 40 is protruded outward on the upper fixing seat 27, and its insertion lever 4 is pushed up by the compression spring 5 and moved away from the insertion groove 340 of the lower body 3 and the buckle seat 34 And the other end 71 of the chain 7, and the other end 71 of the chain 7 can be taken out from the movable slot 31 of the lower body 3. In this way, the tripping action can be completed. The use of the present invention does not limit the size of the locking space , It makes the lock object more convenient, can be used to lock and locate any object, and has an excellent anti-theft effect.

In summary, the present invention has indeed achieved the intended purpose and effect of use, and is more ideal and practical than the conventional ones. However, the above-mentioned embodiments are only specific descriptions of the preferred embodiments of the present invention. This embodiment is not intended to limit the scope of patent application of the present invention, and all other equivalent changes and modifications made without departing from the technical means disclosed in the present invention should be included in the scope of patent application covered by the present invention.

1: chain lock 10: Lock body 100: first slot 101: second grooving 11: Compression spring 12: Lock Heart 13: Insert lever 14: chain 2: Upper body 20: holding tank 21: Guide bar slot 22: positioning bar slot 23: Through hole 24: fixed slot 25: Insert groove 26: screw hole 27: Upper fixed seat 270: Through Hole 271: Perforation 272: Screw 3: Lower body 30: Piercing 31: active slot 320: inlay 321: Shield 33: screw hole 34: buckle seat 340: Socket 341: Locking ring groove 35: Lower fixed seat 350: Alcove 351: Perforation 352: Screw 4: Insert lever 40: lock seat 400: Room 401: locating ring groove 402: Pin Hole 403: positioning pin 404: The first steel ball hole 405: Positioning steel ball 41: Plug 410: Lock lever groove 411: second steel ball hole 412: Locking Steel Ball 5: Compression spring 6: lock heart 60: shaft 600: concave hole 601: Long Wearing Slot 61: fixed pin 62: jack 63: key jack 64: C-shaped buckle 65: Swivel 650: perforation 651: Arc Groove 652: pin hole 653: Jack 66: Torsion spring 660: one end 661: The other end 67: lock lever 670: Convex 671: pin hole 672: grooving 7: chain 70: one end 71: The other end

The first picture shows a three-dimensional view of a conventional chain lock. The second figure shows a schematic diagram of the use of a conventional chain lock. The third figure shows a three-dimensional exploded view of the embodiment of the present invention. The fourth figure shows a three-dimensional assembly diagram of an embodiment of the present invention. The fifth figure shows the combined cross-sectional view of the embodiment of the present invention (the diagram in the unlocked state). Figure 6 is a combined cross-sectional view (unlocked state diagram) of the embodiment of the present invention from another angle. The seventh figure is a schematic cross-sectional view of the embodiment of the present invention when it is locked. The eighth figure is a schematic diagram of another cross-section when the embodiment of the present invention is locked. The ninth figure is a three-dimensional schematic diagram of the embodiment of the present invention when it is locked. The tenth figure is a schematic diagram of the use of the lower body and the upper body rotated by one angle according to the embodiment of the present invention.

2: Upper body

20: holding tank

21: Guide bar slot

22: positioning bar slot

23: Through hole

24: fixed slot

25: Insert groove

26: screw hole

27: Upper fixed seat

270: Through Hole

271: Perforation

272: Screw

3: Lower body

30: Piercing

31: active slot

320: inlay

321: Shield

33: screw hole

34: buckle seat

340: Socket

341: Locking ring groove

35: Lower fixed seat

350: Alcove

351: Perforation

352: Screw

4: Insert lever

40: lock seat

400: Room

401: locating ring groove

402: Pin Hole

403: positioning pin

404: The first steel ball hole

405: Positioning steel ball

41: Plug

410: Lock lever groove

411: second steel ball hole

412: Locking Steel Ball

5: Compression spring

6: lock heart

60: shaft

600: concave hole

601: Long Wearing Slot

61: fixed pin

62: jack

63: key jack

64: C-shaped buckle

65: Swivel

650: perforation

651: Arc Groove

652: pin hole

653: Jack

66: Torsion spring

660: one end

661: The other end

67: lock lever

670: Convex

671: pin hole

672: grooving

Claims (3)

A chain lock includes: An upper body, the upper system is provided with an accommodating groove, the wall of the accommodating groove is provided with at least one guide bar groove and a positioning bar groove, and the bottom of the upper body is provided with a communication communicating with the accommodating groove A hole is provided on the wall surface of the upper body with a fixing slot penetrating the through hole, and the bottom ring of the upper body is provided with an embedding groove; The lower body is pivoted below the upper body, the lower body is provided with a through hole, the wall of the lower body is provided with a movable slot communicating with the through hole, and the top edge of the through hole of the lower body is protruding from the upper body. The embedding edges of the embedding grooves of the main body are embedded with each other, and the bottom surface of the movable slot is provided with a retaining edge in the perforation of the lower body; A buckle seat is set in the perforation of the lower body, the buckle seat is provided with an inserting groove, and the wall of the inserting groove is provided with a locking ring groove; The lower fixing seat is set under the lower body and the buckling seat, and the lower fixing seat is provided with a recess; A plug-in lever is set in the accommodating slot of the upper body and extends through the through hole and the perforation of the lower body. The plug-in lever is set as a lock base part and a plug-in part, and the lock base part is provided with There is a chamber, a positioning ring groove is arranged on the inner wall of the 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, and a positioning pin is arranged in the first steel ball hole. Steel ball, the plug part is provided with a lock rod groove connected to the chamber, the wall of the plug part is provided with two second steel ball holes connected to the lock rod groove, and the second steel ball hole is provided with Lock steel ball; A compression spring is sleeved on the inserting part of the inserting lever and is arranged in the accommodating groove of the upper body; A lock core is set in the accommodating chamber of the lock seat part of the latch, the bottom of the lock core is provided with a shaft, the bottom of the shaft is provided with a concave hole, and the wall of the shaft is provided with a hole connected to the concave hole A fixed pin is inserted through the long through groove, the bottom surface of the lock core is provided with a hole, the top surface of the lock core is provided with a key hole, and the wall surface of the lock core is buckled with a hole C-shaped buckle; A swivel is located below the lock core, the swivel is provided with a perforation for the shaft of the lock core to be inserted, the wall of the swivel is provided with an arc-shaped groove, and the wall of the swivel is additionally provided There is a pin hole connected to the perforation, the fixing pin of the lock core passes through the pin hole of the rotating body, and a hole is provided on the rotating body; A torsion spring is arranged between the lock core and the rotating 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 rotating body; A lock rod is arranged below the rotating body, the top surface of the lock rod is provided with a convex body, the convex system is arranged in the concave hole of the lock core, and the convex body is provided with a pin hole with the rotating body A relatively positive pin hole, the fixing pin of the lock core is inserted in the pin hole of the lock lever, and the wall surface of the lower end of the lock lever is provided with a groove opposite; An upper fixing seat is arranged above the upper body, and the upper fixing seat is provided with a through hole for the lock seat part of the plug lever to pass through; One end of a chain is fixedly arranged 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. The chain lock according to claim 1, wherein the top surface of the upper body is provided with two screw holes, the upper fixing seat is provided with two perforations, and each of the two perforations of the upper fixing seat is provided with a screw, the screw And screw in the screw hole of the upper body. The chain lock according to claim 1, wherein the bottom surface of the lower body is provided with two screw holes, the lower fixing seat is provided with two perforations, and each of the two perforations of the lower fixing seat is provided with a screw. It is screwed in the screw hole of the lower body.

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