How to Draw a Key and Lock

Easy, step by step Key and Lock drawing tutorial
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Locks are mechanical devices that secure doors. Once a lock is in place, it can only be opened with a key or secret code. The oldest known lock was discovered near the ancient Babylonian city of Nineveh. It may be 4,000 years old.

Along with the invention of the lock came, naturally, the key. Keys are designed to fit specific locks. The bulges and protrusions on the key are "keyed" to match the tumblers inside the lock. These protrusions are called ridges or teeth.

Locks and keys are a part of our daily lives - most people lock their cars and homes whenever they leave or enter them. Gym lockers, school lockers, gates, and buildings all have locks.

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As such, locks and keys have entered the English language as well. To keep something "under lock and key" is to keep it hidden away, inaccessible, or protected. To lock someone up and throw away the key means to imprison them forever. And to give someone the key to your heart is a phrase expressing affection.

Would you like to draw a cartoon lock and key? This easy, step-by-step cartoon object drawing tutorial is here to show you how. Our drawing guide depicts a padlock, a common type, and an old-fashioned skeleton key. All you will need is a pencil, an eraser, and a sheet of paper.

If you liked this tutorial, see also the following drawing guides: Treasure Chest, Door, and Cartoon House.

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Step-by-Step Instructions for Drawing a Key and Lock

Key and Lock drawing - step 1
How to Draw Key and Lock: Step 1

1. Begin by drawing an “L” shaped line. Then, draw a short straight line extending from it at a diagonal angle. These lines form the straight sides of the lock. Next, enclose the figure by connecting the straight sides with a long curved line. This is called the lock body.

Key and Lock drawing - step 2
How to Draw Key and Lock: Step 2

2. Draw straight lines to enclose a parallelogram at the top of the lock. Then, draw a long curved line from its corner to the lock’s bottom.

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Key and Lock drawing - step 3
How to Draw Key and Lock: Step 3

3. Draw three small ovals on the face of the lock - one in each of the upper corners, and one at the base.

Key and Lock drawing - step 4
How to Draw Key and Lock: Step 4

4. Draw the keyhole. Outline the keyhole shape - a narrow triangle with a circle at its tip, resembling the shape of a chess pawn. Make it appear three-dimensional by drawing straight and curved lines along two sides of it, then connecting these lines to the outline at the corners.

Key and Lock drawing - step 5
How to Draw Key and Lock: Step 5

5. Next, draw the shackle or shank, erasing as necessary. Draw two parallel, inverted “J” shaped lines emerging from the top of the lock. At the end of the inner “J,” draw three lines like three sides of a square. Then, draw a short line to even the lengths of the “J” shaped lines. Connect the lines on both ends, using short curved lines. Draw a curved line across the bottom of the partial square to give the mechanism a three-dimensional appearance.

Key and Lock drawing - step 6
How to Draw Key and Lock: Step 6

6. Begin to draw the key, erasing as necessary. Draw two long, straight, horizontal, parallel lines. Connect them on one end using a short curved line. This is called the blade, shank, or stem of the key.

Key and Lock drawing - step 7
How to Draw Key and Lock: Step 7

7. Use a long curved line to enclose a rounded shape at the open end of the key. This is called the bow of the key.

Key and Lock drawing - step 8
How to Draw Key and Lock: Step 8

8. Enclose another, smaller rounded shape parallel to the first.

Key and Lock drawing - step 9
How to Draw Key and Lock: Step 9

9. Draw the bit of the key, erasing as necessary. Extend “L” shaped lines from the pin or post (the tip of the key). Connect these to additional “L” shaped lines. Enclose the figure with a long straight line. Then, enclose small rectangles on one side of the bit, giving it a three-dimensional appearance.

Complete Key and Lock drawing
How to Draw Key and Lock: Step 10

Color your cartoon lock and key.

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The Complete Key and Lock Drawing Tutorial in One Image

How to draw: Key and Lock - all drawing steps
How to Draw Key and Lock

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