Pressure controlling apparatus and liquid ejecting apparatus

A pressure controlling apparatus comprising:

• a seat having a communication hole through which a first space and a second space, in which a liquid flows, are in communication with each other;
• a pressure receiving plate configured to move with a change in pressure in the second space;
• a valve member configured to open and close the communication hole in conjunction with the movement of the pressure receiving plate;
• and
• a biasing member disposed between the pressure receiving plate and the seat and configured to bias the pressure receiving plate, wherein
• a portion of the biasing member in contact with the pressure receiving portion has a diameter larger than a maximum diameter of the valve member, and
• wherein, when a straight line is drawn between a center of the biasing member and a farthest edge of the pressure receiving plate from the center of the biasing member, a contact point of the biasing member and the pressure receiving plate is closer to the farthest edge of the pressure receiving plate than the center of the biasing member, where the contact point of the biasing member and the pressure receiving plate are located on the straight line.

A pressure controlling apparatus comprising:

• a seat having a communication hole through which a first space and a second space, in which a liquid flows, are in communication with each other;
• a pressure receiving plate configured to move with a change in pressure in the second space;
• a valve member configured to open and close the communication hole in conjunction with the movement of the pressure receiving plate;
• and
• a biasing member disposed between the pressure receiving plate and the seat and configured to bias the pressure receiving plate,
• wherein, when a straight line is drawn between a center of the biasing member and a farthest edge of the pressure receiving plate from the center of the biasing member, a contact point of the biasing member and the pressure receiving plate is closer to the farthest edge of the pressure receiving plate than the center of the biasing member, where the contact point of the biasing member and pressure receiving plate is located on the straight line.