Combination lock

I created a remix of Trigubovich's excellent lock posted here:

https://www.thingiverse.com/thing:2076136/files

This is a combination lock like the one used on safes.

A large graduated wheel is turned, clockwise and counterclockwise to set a 3 value code.

Its operating principle:

This lock is composed of 3 discs each with a slot.

Disc 1 is integral with the graduated wheel, discs 2 and 3 rotate freely on an axis.

The disc 1 drives the disc 2 thanks to a ''pin'' and the disc 2 drives in its turn the disc 3 also thanks to a pin.

When the slots of the 3 discs are well aligned, a lever can be lowered, activating then the lock.

To familiarize yourself with this type of lock, check out the many videos available on the net (search: ''Combination Lock''

An example :

https://www.youtube.com/watch?v=Wf094Qs0RNg

All the pieces are printable on a 15x15cm tray printer. The file ''Disc2and3.stl'' is to be printed 2 times.

This lock will soon be integrated into a new door for my safe :

https://cults3d.com/en/3d-model/various/mon-coffre-fort

The assembly, very easy, requires :

• 2.5 mm diameter wire, clothes hanger style, for the lever pins

• 4 screws + nuts M4x40 for the assembly

• 2 screws M3x10 to fix the 2 knobs

• an expansion spring of 8 mm diameter and 12 mm length

• files and sandpaper for adjustments, and Superglue

The combination:

You will be able to understand and note the combination by following these steps:

-1 Turn the graduated wheel clockwise three times: this connects the 3 discs together, so they now rotate with the wheel.

continue turning clockwise until the notch on disk 3 is aligned with the lever pin: note the first number in the combination.

-2 Turn the dial counterclockwise for 1 full turn after the first number to engage the center disk.

continue to turn counterclockwise until the center disk notch aligns with the lever pin: note the second number in the combination.

-3 Finally, turn clockwise until the notch on the first disc aligns with the lever pin. The 3 notches should now be aligned and, thanks to the spring, the mechanism unlocks. Note the third number in the combination.

-4 Finally test your combination without looking at the disks, starting again at step 1.

Important note:

• When combining, discs 2 and 3 have a tendency, due to friction, to lose their correct position...

... so I tinkered a ''brake'' on these 2 discs with a square of foam that I glued to the spacer (see the picture).

To see all my creations on cults3d.com :

• enter "oasisk" in the search window

  or

• click on the "all >" button on the line "other 3D models of the same designer"

layer: 0.20

filling: 20%.

border: no

support: no

raft: no

skirt: YES in order to start the extrusion