Lock head structure of chain lock

Abstract

The invention relates to a lock head structure of a chain lock, in particular to the lock head structure of the chain lock, which comprises an inner shell used for being matched with a chain structure to form a lock ring, a lock hole matched with the chain structure is arranged on the inner shell, and a cylindrical pin matched with the chain structure for locking is arranged in the lock hole. A cylindrical pin is arranged in the inner shell, a lock cylinder device and a push rod assembly which are matched with the cylindrical pin are arranged in the positions, opposite to the two sides of the lock hole, in the inner shell, and unlocking and locking of the chain structure are achieved through mutual matching of the cylindrical pin, the lock cylinder device and the push rod assembly. The lock cylinder and the push rod device are arranged on the two sides of the lock hole respectively, so that structural distribution is more reasonable, and the lock further has the advantages of being simple in structure, convenient to machine, easy to assemble and high in practicability.

Description

Technical Field

[0001] The present invention relates to a lock head structure of a chain lock, and particularly to a lock head structure of a chain lock. Background Art

[0002] Most of the chain locks on the market adopt a steel ball structure to lock the plug. However, the small volume of the steel balls results in insufficient structural strength of the lock body. For example, the chain lock with the application number 201910693548.1 and the name "A Chain Lock" is also like this. How to improve the structural strength of the lock body is the technical problem to be solved at present. Summary of the Invention

[0003] In view of the existing technical deficiencies, the present invention provides a lock head structure of a chain lock.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a lock head structure of a chain lock, characterized in that it includes an inner shell for cooperating with a chain structure to form a lock ring. The inner shell is provided with a lock hole for cooperating with the chain structure. A cylindrical pin for cooperating with the chain structure to lock is arranged in the lock hole. A lock core device and a push rod assembly for cooperating with the cylindrical pin are arranged on both sides of the inner shell relative to the lock hole. The chain structure realizes unlocking and locking through the mutual cooperation of the cylindrical pin, the lock core device and the push rod assembly.

[0005] The push rod assembly includes a push block linked and cooperated with the cylindrical pin and a transmission block linked and cooperated with the push block. The transmission block is rotatably connected to the inner shell, and the cylindrical pin realizes reciprocating motion through the cooperation of the push block and the transmission block.

[0006] The push block is provided with a card slot for linking the cylindrical pin, and the cylindrical pin is provided with a limit post for cooperating with the card slot. The cylindrical pin realizes linkage cooperation with the push block by the limit post being inserted into the card slot.

[0007] The transmission block is rotatably connected to the inner shell through a pin shaft. The push block is provided with a guide slot linked and cooperated with the rotating block. One end of the transmission block is provided with a convex block for cooperating with the guide slot. The push block is reciprocated by the convex block being inserted into the guide slot and the rotation of the transmission block.

[0008] The lock core device includes a lock core for cooperating with a key and rotatably connected to the inner shell. The lock core is provided with a rotating block linked and cooperated with the lock core. One end of the transmission block, and the other end relative to the convex block, has a blocking portion. A guide rod is arranged between the rotating block and the blocking portion. The transmission block is driven by the cooperation of the guide rod and the blocking portion on the rotating block.

[0009] The lock core is provided with a guide block, and the rotating block is provided with a limit slot for cooperating with the guide block. The lock core and the rotating block are linked by the guide block being inserted into the limit slot.

[0010] A guiding surface for forcing the guiding rod to reciprocate is provided on the rotating block at a position relative to the guiding rod. The guiding rod realizes reciprocating motion through the cooperation of the guiding surface and the rotation of the rotating block.

[0011] An elastic device for forcing the cylindrical pin to be unlocked is provided on the pushing block.

[0012] An outer shell fixedly assembled with the inner shell is provided outside the inner shell. A first through hole for cooperating with the lock hole is provided on the outer shell at a position relative to the lock hole.

[0013] The lock core device includes a key hole. A second through hole for cooperating with the key hole is provided on the outer shell at a position relative to the key hole. A plug is provided at the second through hole for cooperating with the second through hole. A shaped groove for limiting the reciprocating motion of the plug is provided on the outer shell. The plug realizes the opening and closing of the second through hole through reciprocating motion in the shaped groove.

[0014] Advantages of the present invention: In the lock hole of the present invention, a cylindrical pin is used instead of the steel ball structure on the market, which greatly improves the structural strength of the lock body. The lock core and the push rod device are respectively arranged on both sides of the lock hole position, making the structure distribution more reasonable. The present invention also has the characteristics of simple structure, convenient processing and easy assembly, and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the cooperation between the present invention and the chain structure;

[0016] Figure 2 It is an exploded view of the structure of the present invention;

[0017] Figure 3 It is a cross-sectional view of the present invention in the locked state;

[0018] Figure 4 It is a cross-sectional view of the present invention in the unlocked state;

[0019] Figure 5 It is a schematic structural diagram of the cooperation between the lock core device, the cylindrical pin and the push rod assembly of the present invention;

[0020] Figure 6 It is a schematic structural diagram of the inner shell of the present invention;

[0021] Figure 7 It is a schematic structural diagram of the outer shell of the present invention;

[0022] Figure 8 It is a schematic structural diagram of the rotating block of the present invention;

[0023] Figure 9 It is a schematic structural diagram of the pushing block of the present invention;

[0024] Figure 10 It is a schematic structural diagram of the cylindrical pin of the present invention.

[0025] In the figure: 100, chain structure; 110, lock ring; 200, inner shell; 210, lock hole; 220, cylindrical pin; 300, lock core device; 400, push rod assembly; 500, outer shell; 120, latch pin; 222, first groove; 410, push block; 420, transmission block; 424, second groove; 411, clamping groove; 221, limiting column; 421, pin shaft; 412, guide groove; 422, protrusion; 310, lock core; 320, rotating block; 423, blocking part; 430, guide rod; 311, guide block; 321, limiting groove; 323, third groove; 322, guide surface; 413, elastic device; 510, first through hole; 330, key hole; 520, second through hole; 530, blocking cover; 540, profile groove. DETAILED DESCRIPTION

[0026] like Figures 1 - 10 As shown, a lock head structure of a chain lock includes an inner shell 200 for cooperating with a chain structure 100 to form a lock ring 110, a lock hole 210 for cooperating with the chain structure 100 is provided on the inner shell 200, a cylindrical pin 220 for cooperating with the chain structure 100 for locking is provided in the lock hole 210, a lock core device 300 and a push rod assembly 400 for cooperating with the cylindrical pin 220 are provided in the inner shell 200 and at two sides relative to the lock hole 210, the chain structure 100 is unlocked and locked by the mutual cooperation of the cylindrical pin 220, the lock core device 300 and the push rod assembly 400, one end of the chain structure 100 is fixedly connected to the inner shell 200 or the outer shell 500, a first groove 222 for reciprocating motion of the cylindrical pin 220 is provided on the inner shell 200, the first groove 222 is communicated with the lock hole 210, and the other end is inserted into the lock hole 210 through the latch 120 to achieve locking, and the unlocking and locking process is detailed below.

[0027] The push rod assembly 400 includes a push block 410 that cooperates with the cylindrical pin 220 and a transmission block 420 that cooperates with the push block 410. The transmission block 420 is rotatably connected to the inner shell 200. The cylindrical pin 220 realizes reciprocating motion through the cooperation of the push block 410 and the transmission block 420. The inner shell 200 is provided with a second groove 424 for the transmission block 420 to reciprocate. The push block 410 moves forward and backward through the transmission block 420.

[0028] The push block 410 is provided with a slot 411 for linking the cylindrical pin 220, and the cylindrical pin 220 is provided with a limiting column 221 that matches the slot 411. The cylindrical pin 220 is inserted into the slot 411 through the limiting column 221 to achieve linkage with the push block 410. Two cylindrical pins 220 can be provided to increase the structural strength of the lock body. The push block 410 and the cylindrical pin 220 are inserted into the slot 411 through the limiting column 221 to achieve fixed assembly.

[0029] The transmission block 420 is rotationally connected to the inner shell 200 through a pin shaft 421. A guiding groove 412 that is linked and cooperates with the transmission block 420 is provided on the pushing block 410. A convex block 422 that cooperates with the guiding groove 412 is provided at one end of the transmission block 420. The pushing block 410 is inserted into the guiding groove 412 through the convex block 422, and reciprocating motion is realized through the rotation of the transmission block 420.

[0030] The lock core device 300 includes a lock core 310 that cooperates with a key and is rotationally connected to the inner shell 200. A rotating block 320 that is linked and cooperates with the lock core 310 is provided on the lock core 310. A blocking portion 423 is provided at one end of the transmission block 420 and at a position relative to the other end of the convex block 422. A guiding rod 430 is provided between the rotating block 320 and the blocking portion 423. The transmission block 420 is transmitted to the rotating block 320 through the cooperation of the guiding rod 430 and the blocking portion 423. The lock core 310 is a relatively mature technology on the market and will not be elaborated too much here. After the adapted key is inserted, the lock core 310 can be rotated. The addition of the cooperation of the guiding rod 430 and the transmission block 420 enables the push rod assembly 400 to have the effect of a lever. Because the volume of the lock body itself cannot be infinitely enlarged, and part of the volume is occupied after the cylindrical pin 220 is added, and the installation and stroke control of the cylindrical pin 220 are difficult. The combination of the guiding rod 430 and the transmission block 420 makes the structural optimization very reasonable.

[0031] A guiding block 311 is provided on the lock core 310. A limiting groove 321 that cooperates with the guiding block 311 is provided on the rotating block 320. The lock core 310 and the rotating block 320 are linked by inserting the guiding block 311 into the limiting groove 321. Two guiding blocks 311 can be provided. The lock core 310 and the rotating block 320 are linked by the guiding blocks 311 being snapped into the limiting groove 321. A third groove 323 for the reciprocating motion of the rotating block 320 is provided on the inner shell 200.

[0032] A guiding surface 322 for forcing the guiding rod 430 to reciprocate is provided on the rotating block 320 and at a position relative to the guiding rod 430. The guiding rod 430 realizes reciprocating motion through the cooperation of the guiding surface 322 and the rotation of the rotating block 320. The guiding surface 322 has a certain slope and forms the function of a cam. The reciprocating motion of the guiding rod 430 is realized by the rotation of the rotating block 320 itself.

[0033] An elastic device 413 for forcing the cylindrical pin 220 to be unlocked is provided on the pushing block 410. The elastic device 413 can adopt a spring structure, which is convenient for assembly and has a low cost.

[0034] An outer shell 500 fixedly assembled with the inner shell 200 is provided outside the inner shell 200. A first through hole 510 that cooperates with the lock hole 210 is provided on the outer shell 500 and at a position relative to the lock hole 210. The outer shell 500 and the inner shell 200 can be fixedly assembled by means of snap connection or tight fit.

[0035] The lock core device 300 includes a key hole 330. A second through hole 520 that cooperates with the key hole 330 is provided on the outer shell 500 at a position relative to the key hole 330. A plug 530 that cooperates with the second through hole 520 is provided at the second through hole 520. A groove 540 for limiting the reciprocating movement of the plug 530 is provided on the outer shell 500. The opening and closing of the second through hole 520 is realized by the reciprocating movement of the plug 530 in the groove 540. Adding the plug 530 can block or hide the lock hole 210, improving the waterproof performance of the lock body.

[0036] Usage method:

[0037] In the locked state, the bolt 120 is stuck by the cylindrical pin 220 and cannot be disengaged, thus forming a lock ring 110 fixed to the carrier. When unlocking is required, insert the correct key and rotate the lock core 310. The lock core 310 and the rotating block 320 are linked, so the rotating block 320 also rotates. A guiding surface 322 is provided on the rotating block 320. When the surface with a smaller height of the guiding surface 322 rotates to the position of the guiding rod 430, at this time, the guiding rod 430 has room for movement. One end of the guiding rod 430 is a transmission block 420, so the transmission block 420 also has room for rotation, which means that the pushing block 410 also has room for movement. The pushing block 410 and the cylindrical pin 220 are linked. The pushing block 410 starts to move under the cooperation of the elastic device 413. The cylindrical pin 220 starts to disengage from the lock hole 210, and the bolt 120 can be pulled out from the lock hole 210 to complete unlocking. Rotate the key to reset the cylindrical pin 220 and pull it out. When re-locking is required, rotate the key to temporarily move the cylindrical pin 220 away. When the bolt 120 is inserted, twist the key to re-lock the bolt 120 with the cylindrical pin 220 and wait for the next unlocking.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, simple modifications and substitutions by ordinary technicians in the field are within the protection scope of the present invention.

Claims

1. The lock head structure of a chain lock, characterized in that, It includes an inner shell (200) for cooperating with a chain structure (100) to form a locking ring (110). A locking hole (210) for cooperating with the chain structure (100) is provided on the inner shell (200). A cylindrical pin (220) for cooperating with the chain structure (100) to perform locking is provided in the locking hole (210). A lock core device (300) and a push rod assembly (400) for cooperating with the cylindrical pin (220) are provided inside the inner shell (200) and at two sides relative to the locking hole (210). The chain structure (100) realizes unlocking and locking through the mutual cooperation of the cylindrical pin (220), the lock core device (300), and the push rod assembly (400).

2. The lock head structure of a chain lock as claimed in claim 1, wherein, The push rod assembly (400) includes a push block (410) that is linked and cooperated with the cylindrical pin (220) and a transmission block (420) that is linked and cooperated with the push block (410). The transmission block (420) is rotatably connected to the inner shell (200). The cylindrical pin (220) realizes reciprocating motion through the cooperation of the push block (410) and the transmission block (420).

3. The lock head structure of a chain lock as described in claim 2, characterized in that, A clamping groove (411) for linking the cylindrical pin (220) is provided on the push block (410). A limiting post (221) for cooperating with the clamping groove (411) is provided on the cylindrical pin (220). The cylindrical pin (220) realizes linked cooperation with the push block (410) by the limiting post (221) being inserted into the clamping groove (411).

4. The lock head structure of a chain lock according to claim 2, characterized in that, The transmission block (420) is rotatably connected to the inner shell (200) through a pin shaft (421). A guiding groove (412) for linking and cooperating with the transmission block (420) is provided on the push block (410). A convex block (422) for cooperating with the guiding groove (412) is provided at one end of the transmission block (420). The push block (410) is reciprocated by the convex block (422) being inserted into the guiding groove (412) and through the rotation of the transmission block (420).

5. The lock head structure of a chain lock according to claim 4, characterized in that, The lock core device (300) includes a lock core (310) for cooperating with a key and rotatably connected to the inner shell (200). A rotating block (320) linked and cooperated with the lock core (310) is provided on the lock core (310). A blocking portion (423) is provided at one end of the transmission block (420) and at the other end relative to the convex block (422). A guiding rod (430) is provided between the rotating block (320) and the blocking portion (423). The transmission block (420) is transmitted to the rotating block (320) through the cooperation of the guiding rod (430) and the blocking portion (423).

6. The lock head structure of a chain lock as described in claim 5, characterized in that, A guiding block (311) is provided on the lock core (310). A limiting groove (321) for cooperating with the guiding block (311) is provided on the rotating block (320). The lock core (310) and the rotating block (320) are linked by the guiding block (311) being inserted into the limiting groove (321).

7. The lock head structure of a chain lock as claimed in claim 5, wherein, A guiding surface (322) for forcing the guiding rod (430) to reciprocate is provided on the rotating block (320) and at a position relative to the guiding rod (430). The guiding rod (430) realizes reciprocating motion through the cooperation of the guiding surface (322) and through the rotation of the rotating block (320).

8. The lock head structure of a chain lock according to claim 2, characterized in that, An elastic device (413) for forcing the cylindrical pin (220) to be unlocked is provided on the push block (410).

9. The lock head structure of a chain lock according to any one of claims 1 to 8, characterized in that, An outer shell (500) fixedly assembled with the inner shell (200) is provided outside the inner shell (200). A first through hole (510) matching the lock hole (210) is provided on the outer shell (500) at a position relative to the lock hole (210).

10. The lock head structure of a chain lock according to claim 9, characterized in that, The lock core device (300) includes a key hole (330). A second through hole (520) matching the key hole (330) is provided on the outer shell (500) at a position relative to the key hole (330). A plug cover (530) matching the second through hole (520) is provided at the second through hole (520). A shaped groove (540) for limiting the reciprocating movement of the plug cover (530) is provided on the outer shell (500). The opening and closing of the second through hole (520) is realized by the reciprocating movement of the plug cover (530) in the shaped groove (540).

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