Power generator and fluid supply device having the same

A power generator, comprising:

• a first outer case in which a first internal space is formed;
• a first mainspring module which has a first spring that provides a rotational force as it is wound and unwound by rotation;
• a first inner case which covers the first mainspring module and rotates in a rotational direction about a rotation axis according to the rotational force provided by the first spring;
• a second outer case in which a second internal space is formed and which is disposed on one direction side of the first outer case;
• a second mainspring module which has a second spring that provides a rotational force as it is wound and unwound by rotation;
• a second inner case which covers the second mainspring module and rotates in the rotation direction about the rotation axis according to the rotational force provided by the second spring;
• and
• a first holder module which is coupled to the first outer case to limit the unwinding of the first spring until the unwinding of the second spring is completed, wherein the first mainspring module further comprises a first escapement is connected to the first spring and rotates by the rotational force provided by the first spring and having a plurality of teeth formed at predetermined intervals along a periphery, and wherein the first holder module can limit rotation of the first escapement, wherein the first holder module comprises a first holder whose one end extends to be positioned between a plurality of teeth of the first escapement, and wherein the first inner case has a first inner case opening which is formed to provide a space such that the first holder can be positioned between the teeth of the first escapement.