Shutter holding mechanism

A shutter holding mechanism comprising:

• a shutter substrate which is provided inside a camera body and in which a focal-plane type shutter unit is fixed;
• a pressing spring unit arranged between the camera body and a side of one end portion of the shutter substrate, the pressing spring unit including a first energizing member pressing the shutter substrate to a side of another end portion of the shutter substrate relative to the camera body, and a buffer member that absorbs impact received from the shutter substrate, the buffer member being arranged at a position distanced from the shutter substrate so as to be in non-contact with the shutter substrate when the shutter substrate is not moved, and the buffer member being brought into contact with the shutter substrate only when the shutter substrate is moved by impact;
• a damper unit arranged in a part on a side of the camera body corresponding to the side of the other end portion of the shutter substrate, which is a side opposite to a part where the pressing spring unit is arranged, in a direction along a travel direction of a shutter blade of the shutter unit, the damper unit absorbing impact on the shutter substrate pressed by the pressing spring unit;
• and
• a holding portion that holds the shutter substrate with respect to the camera body and restricts the shutter substrate from moving in a direction perpendicular to the direction along the travel direction of the shutter blade,
• wherein, when the shutter substrate has received a first impact in a first direction along the travel direction of the shutter blade of the shutter unit, the shutter substrate is allowed to move only in the first direction by the holding portion within a range of an elastic force of the first energizing member, and when the shutter substrate has received a second impact larger than the first impact in the first direction, the shutter substrate moves only in a direction along the first direction by the holding portion and the second impact is absorbed by the buffer member.