Urinal

Abstract

A urinal includes a bowl part, a water spout part, a functional part, and a housing part. The bowl part receives urine. The water spout part spouts washing water to the bowl part. The functional part supplies washing water to the water spout part. The housing part is formed on an upper part of the bowl part at a back side thereof and houses the functional part therein. The functional part includes a vacuum breaker that is provided in a water supply channel to the water spout part and prevents a backward flow of sewage water from the water spout part, and a diaphragm that is provided at an upstream side of the vacuum breaker and switches between a water stop state where the water supply channel is closed and a water supply state where the water supply channel is opened. The vacuum breaker is arranged above the diaphragm.

What is claimed is: 
     
         1 . A urinal, comprising:
 a bowl part that receives urine;   a water spout part that spouts washing water to the bowl part;   a functional part that supplies washing water to the water spout part; and   a housing part that is formed on an upper part of the bowl part at a back side thereof and houses the functional part therein, wherein   the functional part includes:
 a vacuum breaker that is provided in a water supply channel to the water spout part and prevents a backward flow of sewage water from the water spout part; and 
 a diaphragm that is provided at an upstream side of the vacuum breaker and switches between a water stop state where the water supply channel is closed and a water supply state where the water supply channel is opened, and 
   the vacuum breaker is arranged above the diaphragm.   
     
     
         2 . The urinal according to  claim 1 , wherein
 the functional part further includes an electricity generation part that is provided at an upstream side of the vacuum breaker and generates electricity by using a flow of washing water in the water supply channel.   
     
     
         3 . The urinal according to  claim 1 , wherein
 the vacuum breaker is fixed to the water spout part.   
     
     
         4 . The urinal according to  claim 1 , wherein
 the vacuum breaker includes:
 a water passage channel that includes a water inflow port at an upstream side thereof and an water outflow port at a downstream side thereof; 
 an atmospheric air introduction port that communicates between the water passage channel and an outside thereof; and 
 a valve body that is provided in the water passage channel and is moved along a vertical direction by a hydraulic pressure of washing water to communicate between the water inflow port and the water outflow port at a time of water passage and communicate between the water passage channel and the atmospheric air introduction port at a time of no water passage. 
   
     
     
         5 . The urinal according to  claim 4 , wherein:
 the vacuum breaker further includes a water receiving part that receives washing water that overflows from the atmospheric air introduction port; and   the water receiving part includes:
 a water discharge port that discharges received washing water; and 
 a wall part that is formed to surround the water discharge port. 
   
     
     
         6 . The urinal according to  claim 5 , wherein
 the water receiving part is formed in such a manner that a bottom surface part that receives washing water slopes downward toward the atmospheric air introduction port.   
     
     
         7 . The urinal according to  claim 5 , wherein
 the water spout part includes:
 a first water spout hole that spouts washing water that is supplied from the water supply channel, to the bowl part; and 
 a second water spout hole that spouts washing water that is supplied from the water receiving part through the water discharge port, to the bowl part. 
   
     
     
         8 . The urinal according to  claim 7 , wherein
 the second water spout hole is provided above the first water spout hole.