Color measurement apparatus

A color measurement apparatus comprising:

• an opening portion forming member that includes an opening, wherein
• the opening portion forming member is arranged in a bottom portion of the color measurement apparatus, and
• the opening is a region that causes light arriving from a measurement target to enter inside the color measurement apparatus;
• a light emitter configured to emit light for measurement toward the measurement target;
• an incident light processing portion that includes a photo diode, wherein the photo diode is configured to process light incident through the opening;
• and
• a shutter unit that is configured to switch between a closed state in which the opening is covered, and an open state which is a state when color measurement is performed and in which the opening is open, and that has a reflection reference surface at a position facing the opening in the closed state as a reference of reflectance, wherein
• the shutter unit is disposed such that the shutter unit is configured to switch to, in addition to the closed state and the open state by sliding, an exposed state by rotating in which the reflection reference surface is toward outside and is exposed outside the color measurement apparatus,
• the shutter unit switches to the open state by sliding in a first direction from the closed state and switches to the closed state by sliding in a second direction opposite to the first direction from the open state,
• the shutter unit includes:
• a sliding member configured to slide along a bottom surface of the color measurement apparatus, wherein the sliding member is a link that is coupled to the shutter unit,
• a shutter that is configured to slide along the bottom surface together with the sliding member, has the reflection reference surface, and is configured to rotate with respect to the sliding member,
• a boss that protrudes in a direction intersecting with the first direction and the second direction,
• a bottom first frame that constitutes the bottom surface, and
• a bottom second frame that is a member constituting the bottom surface together with the bottom first frame and is positioned in the second direction with respect to the bottom first frame,
• the bottom second frame is configured to be attached and detached, regulates rotation of the boss in a mounted state, and allows the rotation of the boss by being detached, and
• the shutter unit switches to the exposed state by rotation of the shutter with respect to the sliding member.