JPS598056Y2 - Hot water mixing faucet - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a hot water mixing faucet that is connected to a hot water supply pipe and a water supply pipe and mixes and discharges hot water and water at a desired ratio.

A hot water mixing faucet, also known as a single-lever mixing faucet, allows you to freely change the temperature of the hot water it discharges by operating a single handle lever, and at the same time, the amount of hot water discharged or opening/closing can also be controlled by operating the handle lever. Such a structure is, for example, the Utility Model Act of 1973
As known from Publication No. 34491, by operating a handle lever on the operating rod of the hot water valve connected to the hot water supply pipe and the operating rod of the water supply valve connected to the water supply pipe, it is possible to turn and move forward and backward in the axial direction. It is made by slidingly contacting an inclined eccentric conical cam.

Now, with this kind of hot water mixer faucet, which is generally installed in bathrooms and washrooms, you can use it by adding a small amount of water to high-temperature water for washing your face, hair, etc., or by mixing hot water and cold water roughly half and half. Although there are requests to use water or just water, there are almost no requests to use water mixed with a small amount of hot water.

However, in the conventional mixing faucet of this kind, even if the handle lever was turned to the low temperature side, that is, to the water side, a small amount of hot water would mix if the handle lever was not turned completely to the water side.

For this reason, if only water was to be discharged, the handle lever had to be turned significantly, making it inconvenient to use.

This is particularly true when the water supply source is a gas instantaneous water heater, as discharging a small amount of hot water may cause the water heater's diaphragm valve to operate prematurely, leading to gas leak accidents. This was a potentially serious flaw.

The present invention aims to provide a hot water/cold mixing faucet that eliminates the above-mentioned drawbacks by improving the shape of the inclined eccentric conical cam. A circular arc surface equidistant from the forward/backward movement axis such that the operating rod is not pressed at a portion where the turning angle is acute over a predetermined range of the outer surface where the operating rod of the hot water supply valve slides from the outer line on the eccentric side parallel to the axis. By having a notch shape in the handle lever, the area where the hot water supply valve is fully closed has a certain width within the turning range of the handle lever.

An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 to 3, 1 is the body, 2H and 2C are its hot water supply pipe connection ports and water supply pipe connection ports, 3 is a partition wall in the body, 4H and 4C are hot water supply ports and water supply ports, and 5H and 5C are A hot water valve and a water supply valve are pressed to the hot water supply port and the water supply port by springs 6 and 6, respectively, 7H and 7C are operating rods of the hot water supply valve and the water supply valve, 8 is a mixing chamber, and 9 is a lower side of the mixing chamber. A hot water discharge pipe is provided, 10 is a bush, 11 is a rotatable lid body, 12
is a handle lever pivotally connected to the lid body by a support shaft 13;
Reference numeral 14 denotes a shaft body, which has a pin 16 projecting from its upper end that engages with the inner end notch 15 of the handle lever, and is rotatably provided in the bush 10 and movable up and down.
An inclined eccentric conical cam 17 is integrally formed at the lower end of the actuating rod 4 and is positioned between the operating rods 7H and 7C.

However, the conical cam 17 of the lever has its upper horizontal section 17
a (the cross section indicated by the two-dot chain line in Fig. 4) is the forward and backward movement axis 17
The lower horizontal section is eccentric and inclined so that the rear outer line 17C is parallel to the axis of movement 17b.

In the present invention, the hot water supply valve 5 is connected from this outside line 17C.
A portion 17d having an acute turning angle over a predetermined range of the outer surface on which the operating rod 7H slides is cut out into a circular arc surface equidistant from the axis of forward and backward movement 17b such that the operating rod 7H is not pressed. be.

In addition, in the conventional inclined eccentric conical cam, the outer surface was shaped symmetrically with respect to the center line 17e passing through the axis of forward and backward movement 17b, so the handle lever 12 was moved within the range L in Fig. 5 (however, the outer line 17C was horizontal). Except when it comes on the line.

), the operating rod 7H pressed against the outer surface of the cam and the hot water supply valve 5H was inadvertently open, resulting in the above-mentioned inconvenience.

On the other hand, in the present invention, the portion of the outer surface where the turning angle is acute over a predetermined range is cut out in a circular arc surface equidistant from the forward/backward movement axis 17b so that the operating rod 7H is not pressed. Even if the cam 17 moves up and down, the hot water valve 5
H can remain closed.

As explained in the above embodiments, in the present invention, when the handle lever is turned to a predetermined range on the water side, the supply of hot water is completely stopped, and there is no possibility that the hot water is mixed with the water and discharged.

Therefore, gas leaks that may occur due to the discharge of a small amount of hot water in stop-start gas instantaneous water heaters can be prevented, and even if unpotable hot water is being supplied from the boiler, the present invention A hot/cold water mixing faucet is easy to use and is useful in practical terms because it completely shuts off the hot water and only discharges water by turning the handle lever within a predetermined range.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is a partially sectional front view, FIG. 3 is a partially sectional plan view, and FIGS. 4 and 5 show its operating state. FIG. 2 is an enlarged cross-sectional plan view of main parts. 5H... Hot water supply valve, 5C... Water supply valve, 7
H... Hot water valve operating rod, 7C... Water supply valve operating rod, 12... Handle lever, 17.
... Inclined eccentric conical cam, 17 b ... Advance/retreat axis, 17 C ... Outer line, 17 d ...
...A part that extends over a certain range on the outer surface.

Claims (1)

[Scope of utility model registration request] The operating rod of the hot water supply valve and the operating rod of the water supply valve are in sliding contact with both sides of an inclined eccentric conical cam connected to the handle lever, and by rotating the inclined eccentric conical cam by the handle lever, the mixing ratio of hot water and water is gradually adjusted. In a hot water/cold mixing faucet which is configured to open/close hot water/water or increase/decrease the discharge amount by moving forward and backward as the cam changes, the hot water supply valve is By forming a notched portion of the outer surface where the operating rod slides over a predetermined range where the turning angle is an acute angle into a circular arc surface equidistant from the forward/backward movement axis so that the operating rod is not pressed,
A hot water mixer faucet characterized by having a certain width area in which a hot water supply valve is fully closed within a turning range of a handle lever.