Safebox with classic numeric code V.4

thingiverse

If you are just looking for a little safe with a four-digit password, I would like to recommend this: https://www.thingiverse.com/thing:5888898 But if you like complex mechanisms, time-consuming projects, and overcomplicated assemblies with lots of components, this one is for you. I tried to make something resembling those old bank safes, with lots of simultaneous locks. It uses a five-digit mechanical password that can be changed anytime if you want by just disassembling the central disks and reassembling them in a new configuration. Warning: Keep in mind that this is a toy, it's made of plastic. If you forget the password, or insert it incorrectly, and try to rotate the lever by force, something will brake (the lever, one of the several gears, some pin...) and the locks will not move, keeping the safe locked. If it happens, you'll not be able to open and acess the door mechanism to fix it. You'll have to break the box and try to acess the mechanism from behind the safe, through inside the box. Therefore, make the mechanism assembling with the door open and take notes of the numbers, the direction of rotation for each number (clockwise or counterclockwise) and the quantity of turns for each number. Do several tests before closing the safe. <strong>Components:<strong> The list of parts to be printed follows below. The number (e.g., "_X2") at the end of the file's name shows the quantity of each component you are going to need. - aligner_x2; - box_A_x1; - box_B_80mm_x1 (optional, if you want your safe with the size 168x168x80mm); - box_B_100mm_x1 (optional, if you want your safe with the size 168x168x100mm); - box_B_168mm_x1 (optional, if you want your safe with the size 168x168x168mm); - closing_ring_x1; - connector_pin_x1; - connector_x1; - dial_protection_x1; - disk_x4; - door_x1; - driving_disk_x1; - hinge_bracket_down_x1; - hinge_bracket_up_x1; - hinge_pin_x4; - hinge_x2; - knob_x1; - latch_x1; - lever_x1; - locking_disk; - locking_gear_x1; - locking_pin_x9; - locking_ring_small_x9; - locking_ring_x15; - planet_gear_x9; - position_disk_x2; - position_disk_x3; - small_connector_x9; - solar_gear_x1; - spacer_x4. <strong>Design specifications:<strong> The size of the safe varies, as you can choose the depth that works best for you. I made three sizes available: 168x168x80mm, 168x168x100mm and 168x168x168mm). The clearances considered in the design are 0.1 mm for fixed parts and 0.2 mm for moving parts. The total weight after printing for the size 168x168x100mm is 456 g (considering a 0.2 mm layer, 15% infill, PLA). <strong>Assembling instructions:<strong> Use the images "Instructions_A-F" to assemble the safe. I inserted notes and recommendations that I judged to be useful when I put my print together. I recommend using lubrication between the moving parts. Sand if necessary to smooth the movements. Some of the components are glued together, so they can't be disassembled after that, so be aware of that. You can also watch the attached video for more information about how to assemble the set. Note that the position you choose to fit the internal disks inside the external disks will determine the numbers on your password combination. You can disassemble those disks and change the password at any time. ALWAYS perform some tests BEFORE closing the door of your safe. Take note of the numbers that need to be aligned with the marking on your dial and what way the knob needs to be rotated (clockwise or counterclockwise) to align all five disks with the latch. I repeat: assemble the whole system on the vault door and perform the unlocking tests with the vault OPEN. After you assemble the mechanism on the door, take time to understand how this kind of safe works. When you turn the external knob clockwise, it rotates the disk fixed on the shaft at the opposite extremity, inside the box. This disk turns and pushes, through the markers, the second disk. The second disk pushes the third disk, the third disk pushes the fourth disk, and the fourth disk pushes the fifth. When the indentation on the fifth disk aligns with the latch, stop the movement and take note of the number aligned on the dial with the arrow. This is your first combination number. Now reverse the rotation (counterclockwise) and proceed until the fourth disk is also aligned. Again, take note of the second number in your combination, the number of turns, and the direction you turned it. Do the same for the remaining disks. Once all the disks are in the correct position, you have cleared the way to move the latch. Here is an example of the combination shown on the attached video: Rotate the knob four times clockwise to be sure that all the disks are moving together; Rotate the knob clockwise until the number 10 aligns with the arrow; Rotate the knob counterclockwise and pass the number 55 three times. On the fourth time, stop exactly at 55; Rotate the knob clockwise, passing by the number 70 once. On the second time, stop exactly at 70; Rotate the knob counterclockwise, passing by the number 25 once. On the second time, stop exactly at 25; Rotate the knob clockwise, stopping exactly at 99. After inserting the five numbers from the password, if the assembly is correct, you should be able to turn the external lever counterclockwise 180°. This action will turn the sun gear and, consequently, the planet gears, pulling all nine locks simultaneously. In case of difficulties, please send me a message, and I can help you with further details. It's not an easy print, but I have fun doing it. Best of luck to everyone who wants to try it.