Propeller apparatus of air mobility

1. A propeller apparatus of an air mobility, the propeller apparatus comprising:

a housing having an inner space, wherein multiple slits are formed along a circumferential surface of the housing to extend in a vertical direction;

a driving unit provided to move in the vertical direction in the inner space of the housing and having connection portions formed to match respective ones of the slits in the housing;

multiple link units provided outside the housing and configured to match the respective ones of the slits in the housing, wherein the link units are rotatably connected to the connection portions, respectively, of the driving unit; and

multiple wing units rotatably installed to the housing, connected to the link units, respectively, and configured to be rotated in a manner of being linked with the link units, which rotate when the driving unit moves up and down, thereby being folded to or deployed from the housing;

wherein each of the link units comprises multiple link parts that are rotatably connected to each other;

wherein each of the wing units comprises:

multiple wing parts that are rotatably connected to respective ones of the link parts and are rotatably connected to each other, and

a first wing part having one end rotatably connected to the housing, and a second wing part rotatably connected to another end of the first wing part, the first wing part and the second wing part being rotatably connected to the link parts of one of the link units; and

wherein each of the link units further comprises a first link part having one end rotatably connected to one of the connection portions and another end slidably and rotatably connected to the first wing part, and a second link part having one end rotatably connected to the another end of the first link part and another end rotatably connected to the second wing part.

2. The propeller apparatus of claim 1 , wherein the driving unit comprises an actuator configured to generate power, and a driving rod configured to move up and down by receiving the power from the actuator, wherein the driving rod extends such that the multiple connection portions provided along a circumference of the driving rod match the respective ones of the slits in the housing.

3. The propeller apparatus of claim 1 , wherein the first wing part comprises a guide slot formed in a linear shape along a longitudinal direction of the guide slot, and the first link part comprises a guide portion formed at the another end of the first link part to be connected to the guide slot.

4. The propeller apparatus of claim 3 , wherein the second wing part comprises a hinge connection portion protruding from one end of the second wing part to be connected to the another end of the second link part, and

the hinge connection portion is formed to match the guide slot and is inserted into the guide slot when the wing units are deployed.

5. The propeller apparatus of claim 3 , wherein the first link part and the second link part are formed to match the guide slot and are inserted into the guide slot when the wing units are deployed.

6. The propeller apparatus of claim 1 , wherein multiple recessed reception grooves are formed in the circumferential surface of the housing to match respective wing units, and respective ones of the slits are formed in each of the reception grooves.

7. The propeller apparatus of claim 1 , wherein the driving unit is configured to operate such that the wing units are folded when a signal is input thereto according to a fall of the air mobility.