Wave receiving mechanism

A wave receiving mechanism comprising:

• a shaft connected to a hydraulic pump and supported so as to be turnable, the shaft being configured to drive the hydraulic pump by turning toward a first side or second side in a circumferential direction;
• and
• a wave receiving member including an arm and a wave receiving plate, the arm being attached to the shaft so as to be unrotatable relative to the shaft, the wave receiving plate being provided at the arm so as to receive force of waves, the wave receiving member being configured to swing about the shaft by receiving the force of the waves and make the shaft turn by the swinging, wherein:
• the arm includes a first arm portion, a second arm portion, and a bendable portion, the first arm portion being attached to the shaft so as to be unrotatable relative to the shaft, the second arm portion being provided at the wave receiving plate, the bendable portion being configured to couple the first arm portion and the second arm portion to each other;
• when a swing angle of the first arm portion is less than a first predetermined angle, the bendable portion makes the first arm portion and the second arm portion swing integrally;
• and
• when the swing angle of the first arm portion is the predetermined angle, the bendable portion allows the second arm portion to bend relative to first arm portion.