JPS636534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a mixing faucet, and in particular to an improvement of a push-pull type switching valve.

(Prior art) A mixing faucet with a conventional push-pull type switching valve supplies mixed water from the switching valve to the shower (discharge port or rudder port) by shifting the switching valve to one position (the other position). It's becoming like that.

(Problem to be solved by the invention) In this mixing faucet that has a push-pull type switching valve, if the supply of mixed water is abruptly stopped by the operating means while water is being supplied to the shower, negative pressure will be generated near the switching valve, and the push-pull type switching valve will There was a case where the switching valve was drawn into negative pressure and moved. Then, if the user subsequently tried to supply water to the shower, the handle of the switching valve had to be set back to its original position.

Therefore, the technical problem of the present invention is to prevent the switching valve from being sucked into negative pressure.

[Structure of the idea]

(Means for Solving the Problems) The technical measures taken to solve the above-mentioned technical excessiveness include a switching valve 15 in which a shaft 15a and a valve body 15b are integrated, and the valve body 15b is integrated. When the valve body 15 is in the first position and deviated in the direction, the valve body 15
b blocks communication between the switching chamber 12 to which the mixed water is supplied and the water spout and allows communication between the switching chamber 12 and the shower head, and the valve body 15b is deflected in the other direction. when the valve body 1 is in the second position.
5b cuts off communication between the switching chamber 12 and the shower head and allows communication between the switching chamber 12 and the water spout, in which the switching chamber is connected to the valve body 15b. 12 and the water spout are formed, and the valve body 15b is in a first position in the passage 18,
In addition, a switching valve for a mixed faucet is provided, which is provided with a check valve 21 that opens when the switching chamber 12 becomes negative pressure.

(Function) Therefore, when the switching chamber 12 becomes negative pressure, the check valve 20 opens and the switching chamber 12 is compensated for the atmosphere. Thus, due to the negative pressure in the switching chamber 12, the valve body 1
5b and shaft 15a (i.e. switching valve 15)
is not sucked into the switching chamber 12 side.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, a cylinder 13 is screwed into the left opening 11a of the switching chamber 12 in the body 11 of the mixing faucet 10, and a liquid-tight connection between the cylinder 13 and the opening 11a is ensured. is held by a seal ring 14. The inside of the cylinder 13 includes a large diameter part 13a, a middle diameter part 13b,
and a small diameter portion 13c, and a shoulder portion 13d is formed at the boundary between the medium diameter portion 13b and the small diameter portion 13c. Further, the left side of the large diameter portion 13a of the cylinder 13, that is, the middle diameter portion 1
A hole 13e is bored on the 3b side, and this hole 1
The inside of the cylinder 13 and a water spout (not shown) communicate with each other via 3e.

The push-pull type switching valve 15 is connected to the shaft 15a.
and a valve body 15b integrally formed on the right end thereof, and the shaft 15a further includes a guide portion 1.
5c is integrally formed. A knob 16 is mounted on the left end of the shaft 15a outside the cylinder 13. The axial flange 16a of the knob 16 faces the outer shoulder 13f of the cylinder 13.

A sealing member 17 is mounted on the guide portion 15c of the shaft 15a and the valve body 15b, and both are attached to the middle diameter portion 1 of the cylinder 13, respectively.
3b and the large diameter portion 13a. The shaft 15a and the valve body 15b include
A common passage 18 is formed, one opening 18a of the passage 18 communicating with the hole 13e, and the other opening 18b facing the switching chamber 12. Passage 1
A tapered valve seat 19 that expands toward the switching chamber 12 is formed on the inner periphery of the valve 8 .
The ball 20 can be seated on the seat. Ball 20 and valve seat 19 form check valve 21 . Note that the ball 20 is inserted into the opening 1 of the passage 18.
An O-ring 22 mounted near 8b prevents it from coming off.

In the states shown in the first figure and the second figure, when the valve body 15b is located in the large diameter portion 13a of the cylinder 13 and is in the first position, the mixed water supplied to the switching chamber 12 flows through the hole 13e. It is designed to prevent water from flowing to the spout through the When the knob 16 is biased to the right and the valve body 15b is located in the second position within the bore 11b of the body 11, the mixed water supplied to the switching chamber 12 flows through the flow path 11c. through the shower head (not shown).

To describe the operation of the above configuration, when the operating means is operated to supply mixed water to the switching chamber 12,
Although the mixed water is sent to the shower head via the flow path 11c, the presence of the check valve 21 and the valve body 15b prevents the mixed water from flowing to the water spout. If the supply of mixed water to the switching chamber 12 is suddenly cut off by operating the operating means while mixed water is being sent to the shower head, if the force of the water jetting outward from the shower head is strong, the switching chamber Negative pressure is generated at 12. Then, the ball 20 is attracted by negative pressure, moves away from the valve seat 19, and closes the check valve 21.
is opened, the atmosphere is introduced into the switching chamber 12 through the spout, the hole 13e and the passage 18, and the switching chamber 12 is compensated for the atmosphere. Therefore, the valve body 15b and the shaft 15a are not sucked together toward the switching chamber 12 due to the negative pressure within the switching chamber 12.

[Effect of idea]

As described above, the present invention provides the shaft 15a
and a valve body 15b are integrated, and when the valve body 15b is deviated in one direction and is in the first position, the valve body 15b is connected to the switching chamber 12 to which mixed water is supplied. The communication between the switching chamber 12 and the shaft head is cut off and the communication between the switching chamber 12 and the shaft head is allowed, and the valve body 15b is deviated in the other direction and the second
When the valve body 15b is in the switching chamber 1
2 and the shower head, and allows communication between the switching chamber 12 and the water spout, and the valve body 15b
A passage 18 is formed in which the switching chamber 12 and the water spout communicate with each other, and the passage 18 has a valve that opens when the valve body 15b is in the first position and the switching chamber 12 becomes negative pressure. Since the check valve 21 is provided to configure the switching valve of the mixing faucet, even if the supply of mixed water is interrupted while the mixed water is being spouted from the shower head, the check valve 21 will not open. As a result, the switching chamber 12 is compensated for the atmosphere, and the switching valve 15 (which is a combination of the shaft 15a and the valve body 15b) is not deviated in the direction of the switching chamber 12.

[Brief explanation of drawings]

FIG. 1 is an overall view including a partial cross section of the mixing faucet, and FIG. 2 is an enlarged sectional view of the switching valve and its vicinity. 12...Switching chamber, 15...Switching valve, 15a...
Shaft, 15b... Valve body, 19... Valve seat, 20
... Ball, 21 ... Check valve.

Claims (1)

[Scope of utility model registration request] A switching valve 15 is provided in which a shaft 15a and a valve body 15b are integrated, and when the valve body 15b is deviated in one direction and is in the first position, the valve body 15b
The communication between the switching chamber 12 to which the mixed water is supplied and the water spout is cut off, and the communication between the switching chamber 12 and the shower head is allowed, and the valve body 15b is deviated in the other direction to open the second shower head. When in position, the valve body 15b
In the mixing faucet in which the switching chamber 12 and the shower head are blocked from communicating with each other and the switching chamber 12 and the water spout are allowed to communicate with each other, the switching chamber 12 is connected to the valve body 15b. A passage 18 is formed which communicates the water spout with the passage 1.
8 is a switching valve for a mixed faucet, which is provided with a check valve 21 that opens when the valve body 15b is in the first position and the switching chamber 12 becomes negative pressure.