Controller, band, and band adjusting device including the controller and the band

1. A controller which allows a movement of a band in a first direction to be freely performed but allows a movement of the band in a second direction opposite to the first direction to be selectively performed, comprising:

a body portion which comprises an insertion space into which one end of the band is inserted and a discharge space through which the one end of the band inserted into the insertion space is discharged;

a band control portion which is mounted to be changeable in position between a first position and a second position based on a rotation axis, is in contact with the band and allows the band to freely move in the first direction in the first position, and is not in contact with the band and allows the band to freely move in the second direction; and

an elastic portion which is elastically deformed when the band control portion is changed in position from the first position to the second position due to an external force and is located to be immovable in the first direction and the second direction in an internal space of the body portion to restore the band control portion from the second position to the first position using a restoring force caused by the elastic deformation when the external force is removed,

a frame portion which defines the insertion space and the discharge space, and

a separation-prevention portion which extends from the frame portion to be in contact with the band control portion to prevent the band control portion from separating in the second direction.

2. The controller of claim 1 , wherein the body portion further comprises an attached material connection portion which extends from the frame portion to be connected to an attached material, and

wherein the elastic portion is prevented from moving in the first direction in the internal space due to contact with one surface of the attached material connection portion.

3. The controller of claim 1 , wherein the band control portion comprises a rotation implementation portion to be rotatable on the rotation axis to allow a mutual change in position between the first position and the second position, and

wherein the frame portion of the body portion comprises a tab that extends inward into an insertion hole of the rotation implementation portion, the tab defining the rotation axis.

4. The controller of claim 3 , wherein the band control portion comprises an external force receiving portion which receives the external force for implementing the movement of the band in the second direction, a holding portion which interconnects with the external receiving portion and is released from the band due to the external force, and a connection portion which connects the external force receiving portion, the holding portion, and the rotation implementation portion to one another,

wherein the rotation implementation portion extends from the connection portion at a certain angle, and

wherein the insertion hole extends to the connection portion.

5. The controller of claim 1 , wherein the band control portion comprises a rotation implementation portion to be rotatable on the rotation axis to allow a change in position between the first position and the second position,

wherein the rotation axis is defined by an inwardly extending tab of the frame portion of the body portion or by a penetration pin which passes through the body portion, and

wherein the rotation implementation portion has an open one side in the second direction to be rotatably mounted on the rotation axis due to a movement in position toward the rotation axis.

6. The controller of claim 1 , wherein the body portion is in contact with the elastic portion so as not to allow the elastic portion to move in the first direction to the internal space, and wherein the rotation axis is in contact with the elastic portion so as not to allow the elastic portion to move in the second direction in the internal space.

7. The controller of claim 1 , wherein the band control portion comprises a rotation implementation portion to be rotatable on the rotation axis to allow a mutual change in position between the first position and the second position, and

wherein the separation-prevention portion provides a through space having a certain size in the body portion to allow the rotation implementation portion to pass therethrough when the band control portion is inserted into the internal space.

8. The controller of claim 1 , wherein the body portion comprises a front wall, a ear wall, a top wall, and a bottom wall, which define the internal space, and a discharge-space-defining wall to allow the discharge space to be defined by a relationship with the rear wall, and

wherein the elastic portion comprises a mounting portion mounted on the front wall, a restriction portion which extends from the mounting portion to be in contact with the discharge-space-defining wall in the internal space to restrict a movement in position in the first direction, and an elastic deformation portion which extends from the mounting portion to be elastically deformed by a change in position of the band control portion.

9. The controller of claim 8 , wherein the restriction portion and the elastic deformation portion extend from opposite ends of the mounting portion, and

wherein a boundary between the mounting portion and the elastic deformation portion is in contact with the rotation axis to restrict a movement in position in the second direction.

10. The controller of claim 9 , wherein the elastic deformation portion is formed to be rounded to prevent a reduction in restoring force during elastic deformation.

11. The controller of claim 8 , wherein the band control portion comprises an external force receiving portion which receives the external force to implement the movement of the band in the second direction, a holding portion which interconnects with the external force receiving portion and is released from the band due to the external force, and a connection portion which connects the external force receiving portion with the holding portion,

wherein the second front wall comprises a through hole which passes therethrough to allow an attached material fixing portion for connection with an attached material to pass therethrough, and

wherein a plurality of holding portions are provided and are spaced apart to provide an interference prevention space so as not to interfere with the attached material fixing portion.