# US 11,306,509 B2 · Bottom opening password lock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,509 B2 - Document ID: US11306509B2 - Status: Granted - Kind: B2 - Application number: 16/721,722 - Filed: 2019-12-19 - Published: 2020-06-25 - Granted: 2022-04-19 - Earliest claimed: 2018-12-24 - Applicants: Ningbo Jiangbei Ruifeng Lock Industry Co., Ltd. - Inventors: Zhihui Cai - Web page: https://patentgrep.com/patent/US11306509B2 ## CPC - E05B 37/025: {in padlocks} - E05B 15/0086: {Toggle levers (toggle fasteners E05C19/14)} - E05B 15/04: Spring arrangements in locks {(E05B3/065, E05B15/101, E05B15/143, E05C19/06 take precedence)} - E05B 37/0058: {by axial disengagement between hub and rim of tumbler discs or rings} - E05B 37/0068: {in padlocks (E05B37/025, E05B37/10 and E05B37/14 take precedence)} - E05B 67/22: Padlocks with sliding shackles, with or without rotary or pivotal movement - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS ## Abstract A bottom opening password lock comprises a lock case and a liner arranged in the lock case as well as a shackle connected with a top of the lock case, and a fork, a password assembly and a locking mechanism are installed and arranged on the liner; the password assembly comprises a pin shaft and a second spring, a clutch sleeve, a password wheel, a code adjusting lever and a washer sleeved on the pin shaft. One end of the second spring is abutted against an inner side of the washer, and the other end is abutted against the clutch sleeve away from the code adjusting lever. The bottom opening of the present invention adjusts a password through the code adjusting lever, the code adjusting lever is toggled manually, the code adjusting lever directly pushes the clutch sleeve to move and separate from the password wheel, and the pin shaft is motionless. The code adjusting lever is located at the bottom of a lock body, which is convenient to adjust, may not be lost, and is more convenient for users to use. ## Claims ### Claim 1 A bottom opening password lock, comprising a lock case (1) and a liner (7) arranged in the lock case (1) as well as a shackle (2) connected with a top of the lock case (1), and wherein a fork (3), a password assembly (4) and a locking mechanism (5) are installed and arranged on the liner (7); and characterized in that the password assembly (4) comprises a pin shaft (41) and a second spring (42), a clutch sleeve (43), a password wheel (44), a code adjusting lever (45) and a washer (46) sleeved on the pin shaft (41), and one end of the second spring (42) is abutted against an inner side of the washer (46), and the other end is abutted against the clutch sleeve (43) away from the code adjusting lever (46); and the clutch sleeve (43) comprises a shaft sleeve (431) and a driving part (432); the password wheel (44) is sleeved on the shaft sleeve (431); multiple notches (441) are arranged in the center of the password wheel (44); a convex key (4324) that extends towards one side of the shaft sleeve (431) along a longitudinal direction of an axis of the pin shaft (41) and is matched with the notch (441) is arranged on the driving part (432); the code adjusting lever (45) comprises a sleeving portion (451) and a handle (452); The sleeving portion (451) is sleeved on the pin shaft (41); an opening (11) for the handle (452) to extend is arranged at the bottom of the lock case (1); the driving part (432) comprises a flat portion (4321) and a curved portion (4322), a groove (4323) is arranged on the curved portion (4322), and a bulge (71) that is matched with the groove (4323) is arranged on the liner (7); when adjusting a password through the code adjusting lever (45), the code adjusting lever (45) directly pushes the clutch sleeve (43) to move and separate from the password wheel (44) while the pin shaft (41) is motionless so that the convex key (4324) is separated from the notch (441) of the password wheel (44), and the groove (4323) of the clutch sleeve (43) is matched with the bulge (71) arranged on the liner (7) so that the clutch sleeve (43) does not rotate around the pin shaft (41). ### Claim 2 (depends on 1) The bottom opening password lock according to claim 1, characterized in that the opening (11) is L-shaped. ### Claim 3 (depends on 1) The bottom opening password lock according to claim 1, characterized in that a first spring (6) is also arranged on the liner (7); and one end of the first spring (6) is connected with the fork (3), and the other is connected with the liner (7). ### Claim 4 (depends on 1) The bottom opening password lock according to claim 1, characterized in that a number of the clutch sleeve (43) and the password wheel (44) is respectively four. ### Claim 5 (depends on 1) The bottom opening password lock according to claim 1, characterized in that a curved bulge (4325) is arranged on the flat portion (4321), and a curved recess that is matched with the curved bulge (4325) is arranged on the end of a leg (31). ### Claim 6 (depends on 1) The bottom opening password lock according to claim 1, characterized in that the shackle (2) is a U-bar, and a clamping groove (21) is arranged in an inner side of the opposite bar. ### Claim 7 (depends on 1) The bottom opening password lock according to claim 1, characterized in that the fork (3) comprises the leg (31) that is matched with the password assembly (4) and a stop end (32) that is matched with the locking mechanism (5). ### Claim 8 (depends on 1) The bottom opening password lock according to claim 1, characterized in that the locking mechanism (5) comprises a left bolt (51), a right bolt (53) and a third spring (52) arranged between the left bolt (51) and the right bolt (53).