Turn signal switch device

A turn signal switch device comprising:

• a switch housing mountable on a handlebar of a vehicle;
• an operation knob configured to be swing-operable along a first operation direction, operable in a push direction, and operable in a second operation direction different from both of the first operation direction and the push direction, wherein
• the operation knob protrudes from the switch housing,
• the second operation direction is a direction extending from the operation knob toward the handlebar when the switch housing is mounted on the handlebar,
• a through-hole is provided in a wall portion of the switch housing,
• the operation knob includes an actuator extending from the operation knob and inserted into the through-hole,
• the through-hole includes a first opening portion opening along the first operation direction, and a second opening portion opening along the second operation direction, the first opening portion and the second opening portion intersecting with each other,
• a connection point of the first opening portion and the second opening portion is formed into a round shape,
• when a swing operation of the operation knob is performed, a turn signal on a side corresponding to a direction of the swing operation blinks,
• when the operation knob is operated in the second operation direction, the turn signal executes a lighting mode different from blinking of the turn signal that is performed by the swing operation, and
• after the operation knob is operated in the first operation direction, the push direction, or the second operation direction, the operation knob returns to a neutral position at which the operation knob is held at a non-operated timing of the operation knob.