Cart with wheel that is easily lockable and unlockable

A cart with a wheel that is easily lockable and unlockable, the cart comprising:

• a platform having the wheel including therein a fixing piece in which a plurality of recessed grooves are formed along an inner circumference thereon and on which freight is loadable;
• a handle bar including an inverted U shaped frame including a left frame, a right frame, and a connecting frame, of which rearward rotation is limited by a rearward rotation limiting part provided at a rear side of an upper surface of the platform, a wheel locking and unlocking operation part provided on the inverted U shaped frame and configured to be pressed and elastically restored, and an operation part configured to operate by an operation of the wheel locking and unlocking operation part;
• and
• a folding operation part including a pedal provided at one end of the platform, a pedal connecting part connected to the pedal from a lower surface of the platform, and a folding operation rod supported by the pedal connecting part and configured to vertically move,
• wherein the operation part of the handle bar includes:
• a first operation part disposed inside the left frame and the right frame and configured to vertically operate by an operation of pressing and releasing the wheel locking and unlocking operation part;
• a second operation part coupled to a lower end of the first operation part and having a recessed groove formed at a lower end portion thereof;
• a third operation part disposed at the lower surface of the platform and configured to rotate or be elastically restored, in linkage with an operation of the second operation part, about a hinge provided at a rotary plate provided at the lower surface of the platform;
• and
• a fourth operation part connected to the third operation part via the rotary plate and configured to be inserted and withdrawn into and from one of the plurality of recessed grooves of the wheel to cause the wheel to be locked and unlocked.