RECORDING AND REPRODUCING DEVICE

1 . A recording and reproducing device comprising:

a case;

at least one recording medium having a disk-shape, a motor configured to rotate the at least one recording medium, a head configured to read or write information from or to the at least one recording medium, and an actuator configured to drive the head to scan in a radial direction of the at least one recording medium which are provided in the case; and

a regulating portion configured to, when an external shock is applied to the at least one recording medium, contact an outer peripheral edge of the at least one recording medium to regulate displacements of the at least one recording medium due to bending of the at least one recording medium,

wherein the regulating portion has a regulating member displaced between a position away from the outer peripheral edge of the at least one recording medium and a contact-possible position or a contacting position.

2 . The recording and reproducing device according to claim 1 ,

wherein the regulating portion is displaced to a position where the regulating member is able to come into contact with or comes into contact with the outer peripheral edge of the at least one recording medium when an external shock is applied to the at least one recording medium.

3 . The recording and reproducing device according to claim 1 ,

wherein the regulating portion slides the regulating member in the radial direction of the at least one recording medium between a position away from the outer peripheral edge of the at least one recording medium and a contact-possible position or a contacting position.

4 . The recording and reproducing device according to claim 3 ,

wherein the regulating member is pivotally supported on a support shaft parallel to a rotation axis of the at least one recording medium, and rotates following the rotation of the at least one recording medium by coming into contact with the outer peripheral edge of the at least one recording medium.

5 . The recording and reproducing device according to claim 1 ,

wherein the regulating member has a cam shape, a distance from a rotation center of which is changed, between a position away from the outer peripheral edge of the at least one recording medium and a contact-possible position or a contacting position, and

the regulating portion drives the regulating member to pivot around an axis parallel to a rotation axis of the at least one recording medium between a position away from the outer peripheral edge of the at least one recording medium and a contact-possible position or a contacting position.

6 . The recording and reproducing device according to claim 1 ,

wherein the regulating member has a pair of contact surfaces facing the outer peripheral edge of the at least one recording medium, and

the pair of contact surfaces are inclined in opposite directions with the outer peripheral edge of the at least one recording medium interposed therebetween.

7 . The recording and reproducing device according to claim 2 ,

wherein the at least one recording medium includes a plurality of recording medium;

the plurality of recording medium are arranged in an axial direction parallel to a rotation axis of the at least one recording medium,

the pair of contact surfaces includes a plurality of pairs of contact surfaces, and

each of the plurality of pairs of contact surfaces is arranged on the outer peripheral edge of the regulating member in the axial direction corresponding to each of the plurality of recording medium.

8 . The recording and reproducing device according to claim 1 , wherein the regulating portion includes a plurality of regulating portions, and each of the plurality of regulating portions is provided at each of a plurality of positions in a circumferential direction of the at least one recording medium.

9 . The recording and reproducing device according to claim 1 , wherein the at least one recording medium has a diameter of 90 mm or more and a thickness of 0.550 mm or less.