Color measurement apparatus

A color measurement apparatus, comprising:

• an opening portion forming region that is a region in which an opening portion for causing light arriving from a measurement target to enter inside the color measurement apparatus is formed, and that is arranged on a bottom surface at a time of measurement performed by the color measurement apparatus;
• an incident light processing region configured to process light incident through the opening portion, wherein
• the incident light processing region includes:
• a bandpass filter,
• a variable wavelength optical filter, and
• a light reception region, and
• the light reception region includes a photodiode;
• a shutter device configured to be displaced between a closed position at which the opening portion is covered, and an open position at which the opening portion is open;
• and
• a movement region that is formed in the opening portion forming region and, when the shutter device at the closed position is displaced toward the open position, moves a shutter protrusion in a direction in which the shutter protrusion is separated from the opening portion forming region, wherein
• the shutter device includes:
• a shutter,
• the shutter protrusion configured to close the opening portion when the shutter device is at the closed position,
• a shutter holding region that holds the shutter protrusion such that the shutter protrusion is configured to be displaced in a direction of approaching to and separating from the opening portion, and
• a plate spring that presses the shutter protrusion toward the opening portion,
• the shutter holding region includes:
• a first guide shaft, and
• a second guide shaft,
• the movement region includes:
• a first protruding rib that protrudes toward the shutter protrusion, and
• a second protruding rib that is formed in the shutter protrusion and protrudes toward the opening portion forming region,
• when the shutter device is at the closed position, the first protruding rib is in a state of non-contact with the second protruding rib, and
• when the shutter device at the closed position is displaced toward the open position, the second protruding rib moves over the first protruding rib and causes the shutter protrusion to move in the direction of separating from the opening portion forming region.