This is a Cipher Helmet Lock that can keep the helmet safe on a bicycle.

I started to design this model in 2020. As a 3D print model, the function and reliability of this design have been proved in the past 4 years of 4 versions development and 2 years outdoors using tests. Now with the help of the “Maker's Supply“ project, I think it’s time to release it to the world.

I appreciate Makerworld’s help. This design would have been difficult to implement without their assistance.

There are 3 sizes of the lock fixture parts(P7): diameter 20mm,16.5mm, and 23mm, I also uploaded the STEP file of the part, so you can try to modify it to your size.

Disclaimer: This model is part of the Creator Program, When you purchase the hardware kit through the links below, creators may earn an affiliate commission as a reward of their work. (The creator program is currently in the trial phase. The application is not yet open to public.)

Recommended filaments: BambuLab PLA-CF , ASA, ASA-CF, PETG-CF, PETG HF, PETG Translucent , PC , PET-CF .

自2020年起，我就一直在创作这款密码头盔锁。作为一个3D打印制造的产品，在经过四年的开发和两年的户外使用测试后，这款产品的实用性和可靠性均得到了验证。在MakerWorld的“Maker's Supply"项目的帮助下，该产品的所有五金件以套件的形式上架，为想要制作这款头盔锁的用户提供了便利性。中文版详细介绍请见附件中的“密码头盔锁安装说明书”。感谢MakerWorld的帮助，谢谢大家的支持！

把锁固定在车把上的零件有三种尺寸，20mm,16.5mm, 和23mm，我还上传了这个零件的STEP文件，有修改能力的朋友可以根据实际需求自行修改。

See the “ASSEMBLY MANUAL” （English and 简体中文）for more information.