Flush toilet

A flush toilet comprising:

• a bowl portion configured to receive waste;
• a trap portion extending from the bowl portion and configured to discharge the waste received by the bowl portion;
• a main conduit through which washing water toward the bowl portion flows;
• a rim communication hole into which the washing water flows from the main conduit;
• a rim conduit through which the washing water that has flowed in from the rim communication hole flows;
• a rim spout configured to supply the washing water flowing through the rim conduit to the bowl portion;
• and
• a smaller flow-path portion formed on an upstream side of the rim spout in the rim conduit and having a flow-path cross-sectional area smaller than a flow-path cross-sectional area of the rim spout, wherein
• the smaller flow-path portion and the rim spout are formed in a same flow path,
• a first inclined wall is formed for which an upper surface is inclined upward toward downstream up to the rim spout including a downstream region of the smaller flow-path portion, and
• a second inclined wall is formed for which a bottom surface is inclined downward toward downstream up to the rim spout including a downstream region of the smaller flow-path portion, wherein
• the first inclined wall and the second inclined wall are formed on an upper side and a lower side, respectively, in a vertical direction,
• the flush toilet further comprising:
• a jet conduit through which the washing water from the main conduit flows,
• a jet spout configured to jet the washing water that has flowed through the jet conduit from the front of the trap portion toward the trap portion, and
• a pressure-rate control portion connecting the main conduit and the rim conduit on an upstream side of the jet conduit, wherein
• the jet spout is formed at a distal end of the jet conduit,
• the jet conduit includes a contracted portion having a cross-sectional area that becomes smaller toward the jet spout side,
• the cross-sectional area of the jet spout is the smallest of all cross-sectional areas of the jet conduit,
• a reduction ratio in a width of a top surface of the contracted portion in a flow direction of the washing water in the jet conduit is smaller than a reduction ratio in the width of a bottom surface of the contracted portion in the flow direction, and
• an angle formed between at least one side surface, among side surfaces of the jet conduit, and a top surface of the jet conduit is an acute angle.