公开(公告)号：US20170217128A1

公开(公告)日：2017-08-03

申请号：US15416099

申请日：2017-01-26

Applicant: Hsuan-Chih LIN ,  Chun-Cheng LEE

Inventor： Hsuan-Chih LIN ,  Chun-Cheng LEE

IPC: B32B7/08 ,  B32B37/10 ,  B32B3/30 ,  B32B7/04 ,  B32B3/26

CPC classification number: B32B7/08 ,  B32B3/266 ,  B32B3/30 ,  B32B7/05 ,  B32B15/082 ,  B32B15/085 ,  B32B15/09 ,  B32B15/18 ,  B32B15/20 ,  B32B27/08 ,  B32B27/302 ,  B32B27/32 ,  B32B27/365 ,  B32B37/10 ,  B32B38/06 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2250/40 ,  B32B2307/30 ,  B32B2307/54 ,  B32B2307/558 ,  B32B2307/718

Abstract: A composite hollow board structure and a manufacturing method thereof are provided. The composite hollow board structure includes a first plate having a surface formed of a plurality of first conical rings and a plurality of first attachment rings thereon; and a second plate pressed onto the first plate and having a surface formed a plurality of second conical rings and a plurality of second attachment rings thereon; wherein each first conical ring and each second attachment ring are inserted onto each other, each second conical ring and each first attachment ring are inserted onto each other; a hollow cavity is respectively formed between each first conical ring and each second attachment ring as well as between each second conical ring and each first attachment ring. Accordingly, the known bonding or welding step can be omitted to increase deformation capacity with simplified process and reduced manufacturing time.

公开(公告)号：US20220227453A1

公开(公告)日：2022-07-21

申请号：US17575229

申请日：2022-01-13

Applicant: Hsuan-Chih LIN ,  Chun-Cheng LEE

Inventor： Hsuan-Chih LIN ,  Chun-Cheng LEE

IPC: B62M1/36 ,  B62M11/02

Abstract: The present disclosure related to an effort-saving crank structure (1) of a bicycle (8), which includes: a crank mechanism (10) having a crank (11), a shaft end gear (12) and a treadle end gear (13) disposed on the crank (11); a transmission mechanism (20) disposed in the crank (11) and having a rotation shaft (21) and a first gear (22) and a second gear (23) connected to the rotation shaft (21), the first gear (22) and the shaft end gear (12) are engaged for transmission, and the second gear (23) and the treadle end gear (13) are engaged for transmission; a rotation arm unit (30) having a first rotation arm (31) and a second rotation arm (32), two ends of the second rotation arm (32) are respectively connected to the first rotation arm (31) and the treadle end gear (13).