Pushbutton switch

A pushbutton switch, comprising:

• a transparent or substantially transparent button that receives a depressing operation and is arranged above an external display;
• a plurality of lenses arranged between the button and the external display, the plurality of lenses projecting an image outputted from the external display as focused on a top panel of the button in a standby position before performing the depressing operation;
• and
• a retaining member that retains the plurality of lenses such that a position and orientation of each of the plurality of lenses are fixed relative to the external display, wherein
• the retaining member
• is configured with a combination including a first retaining member that has a first fitted part to be fitted with a first projection part or a first recessed part provided in a vicinity of an edge part of one of the plurality of lenses arranged adjacent to the top panel;
• a second retaining member that has a second fitted part to be fitted with a second projection part or a second recessed part provided in a vicinity of an edge part of one of the plurality of lenses arranged adjacent to the external display;
• and a diaphragm member sandwiched and held between the first retaining member and the second retaining member.