Medium support device and reading device

A medium support device comprising:

• a medium support portion that has a medium support surface on which a medium is supported such that the medium is configured to be transported in a transport direction;
• and
• an extension support portion that is provided in the medium support portion, wherein
• the extension support portion has
• a first extension portion that is configured to be displaced between a stored state in which the first extension portion is stored in the medium support portion and an extended state in which the first extension portion is rotated with respect to the medium support portion to be extended and supports the medium together with the medium support portion, and
• a second extension portion that is configured to be displaced between a stored state in which the second extension portion is stored in the first extension portion and an extended state in which the second extension portion is slid from the first extension portion in a first direction to be extended and supports the medium together with the first extension portion, the second extension portion being configured to be displaced, interlocking with rotation and displacement of the first extension portion,
• the first extension portion has a first right-side extension portion that is located further on a right side than a center position of the medium support portion, and a first left-side extension portion that is located further on a left side than the center position when viewed from a front side in a depth direction intersecting the transport direction,
• the second extension portion has a second right-side extension portion that is stored in the first right-side extension portion and a second left-side extension portion that is stored in the first left-side extension portion,
• the second right-side extension portion entirely overlaps with the first right-side extension portion in the stored state when viewed in the depth direction,
• the second left-side extension portion entirely overlaps with the first left-side extension portion when viewed in the depth direction in the stored state,
• the medium support portion
• is configured to open and close, by pivoting, a transport entrance through which the medium is transported,
• is configured to support the medium in the open state, and
• has an orientation along the depth direction in the closed state, and
• the first extension portion entirely overlaps with the medium support portion in plan view in a state in which the first extension portion is stored in the medium support portion in the closed state.

A medium support device comprising:

• a medium support portion that has a medium support surface on which a medium is supported such that the medium is configured to be transported in a transport direction;
• and
• an extension support portion that is provided in the medium support portion, wherein
• the extension support portion has
• a first extension portion that is configured to be displaced between a stored state in which the first extension portion is stored in the medium support portion and an extended state in which the first extension portion is rotated with respect to the medium support portion to be extended and supports the medium together with the medium support portion, and
• a second extension portion that is configured to be displaced between a stored state in which the second extension portion is stored in the first extension portion and an extended state in which the second extension portion is slid from the first extension portion in a first direction to be extended and supports the medium together with the first extension portion,
• the first extension portion has
• a first right-side extension portion that is located further on a right side than a center position of the medium support portion, and a first left-side extension portion that is located further on a left side than the center position when viewed from a front side in a depth direction intersecting the transport direction,
• a right-side gear that is located at a base end of the first right-side extension portion and forms a right-side rotation fulcrum of the first right-side extension portion, and a left-side gear that is located at a base end of the first left-side extension portion, forms a left-side rotation fulcrum of the first left-side extension portion, and is engaged with the right-side gear,
• the first right-side extension portion includes, in a second direction intersecting the first direction, a right-side first end portion and a right-side second end portion facing the right-side first end portion,
• the first left-side extension portion includes, in the second direction, a left-side first end portion and a left-side second end portion facing the left-side first end portion,
• a side surface that forms the right-side second end portion of the first right-side extension portion and a side surface that forms the left-side first end portion of the first left-side extension portion have a partial range from base ends that are in contact,
• the right-side gear is provided to be located between the right-side first end portion and the right-side second end portion of the first right-side extension portion,
• the left-side gear is provided to be located between the left-side first end portion and the left-side second end portion of the first left-side extension portion,
• the second extension portion has a second right-side extension portion that is stored in the first right-side extension portion and a second left-side extension portion that is stored in the first left-side extension portion,
• the second right-side extension portion entirely overlaps with the first right-side extension portion in the stored state when viewed in the depth direction, and
• the second left-side extension portion entirely overlaps with the first left-side extension portion when viewed in the depth direction in the stored state.