JPH0631260Y2 - Safety mechanism of hot and cold water mixer - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a hot and cold water mixing faucet in which hot water of a desired temperature is discharged by rotating a temperature control handle. The present invention relates to a technique in which the rotation operation of the temperature control handle is temporarily stopped at (temperature).

[Conventional technology]

In the case of a hot and cold water mixing faucet that mixes hot water and hot water to discharge hot water of a desired temperature, when adjusting the temperature of the hot water discharged from the hot and cold water mixing faucet, the temperature of the hot water reaches a certain set temperature. When doing, temporarily stop the rotation operation of the temperature control handle,
A mechanism for making the user recognize that further rotation operation is an operation of discharging hot water at a dangerous temperature (hereinafter,
This mechanism is called a safety mechanism) is generally incorporated.

FIG. 7 to FIG. 9 show a safety mechanism in this conventional hot and cold water mixing faucet 1. The hot and cold water mixing faucet 1 includes a temperature control spindle 4 mounted in a tubular faucet body 2 via a mounting ring 3, a stop ring 5 fitted and fixed to the mounting ring 3, and the temperature control spindle 4 It has a temperature control handle 6 connected to the shaft 4a of the above through a serration 4b. The mounting ring 3 has a male screw 3a engraved on its outer peripheral surface screwed onto a female screw 2a in the faucet body 2, and the stop ring 5 has a gear 5a engraved on its inner peripheral surface. The mounting ring 3 is meshed with a gear 3c engraved in the square portion of the prismatic portion 3b to prevent rotation.

As shown in FIG. 8, the stop ring 5 has annular locking step portions 5b and 5c on the end surface on the temperature control handle 6 side, and the low step portion 5d has a temperature of hot water to be discharged. It is set as a normal operation area until the temperature reaches the set temperature, and the high step portion 5e is set as an operation area in the case of discharging hot water having a temperature higher than the set temperature. As shown in FIG. 9, a push button 7 is attached to the temperature control handle 6 by a leaf spring 8 so as to be normally urged to project outward, and the stop ring 5 is attached to the lower end side of the push button 7. Stoppers 9 corresponding to the stop portions 5b and 5c are integrally attached.

In a normal state, the stopper 9 is in the region of the lower step portion 5d of the stop ring 5, and the temperature control handle 6 can be freely rotated in this region. That is, when it is desired to change the temperature of the hot water within the set temperature of 42 ° C., the change can be freely made. When the temperature control handle 6 is rotated, the spindle shaft 4a is rotated and the axial length of the spindle 4 is displaced to change the axial position of a spool valve (not shown) that abuts the spindle 4. . Therefore, the opening area ratio of the hot water inlet and the hot water inlet is changed, and the temperature of the hot water discharged from the hot and cold water mixing faucet 1 can be freely changed. This is a common technique in this kind of hot and cold water mixing faucet 1, and a detailed description thereof will be omitted here.

By the way, when the temperature adjusting handle 6 is rotated to the direction where the temperature of the discharged hot water becomes higher, the stopper 9 of the push button 7 locks the stop ring 5 at the position where the set hot water of 42 ° C. should be discharged. The temperature control handle 6 comes into contact with the step portion 5b, and the temperature control handle 6 cannot be further rotated. That is, the user is made to confirm that the further turning operation of the temperature control handle 6 is above the dangerous temperature, and the hot water at the dangerous temperature is prevented from being discharged all at once by an inadvertent operation. If it is necessary to discharge hot water of 42 ° C or higher as set, push button 7 is pushed down at the position where stopper 9 is in contact with locking step portion 5b, and stopper 9 is placed on the inner peripheral surface side of high step portion 5e. You can avoid it. As a result, the temperature adjustment handle 6 can be rotated to discharge the set hot water of 42 ° C. or higher.

[Problems to be solved by the device]

However, in the above-mentioned conventional safety mechanism, the stopper 9 and the push button 7 are biased by the leaf spring 8, and the two members of the leaf spring 8 and the stopper 9 are put into the extremely narrow mounting space of the temperature control handle 6. Since it had to be incorporated, there was a drawback that the assembling work was difficult. A coil spring may be used instead of the leaf spring 8, but this case also has the same drawback.

[Means for Solving the Problems]

SUMMARY OF THE INVENTION The present invention has been improved and removed in view of the above-mentioned drawbacks of the prior art, and it is extremely easy to incorporate a safety mechanism in which the turning operation of the temperature control handle is temporarily stopped at a predetermined temperature. The purpose is to provide the technology that can do it.

Thus, the means adopted by the present invention to solve the above-mentioned problems is to control the axial position of the temperature control spindle mounted in the faucet body by rotating the temperature control handle, A hot and cold water mixing faucet configured to discharge hot water of a desired temperature by adjusting a mixing ratio with water, a stop ring having an annular locking step portion arranged and fixed on an outer peripheral side of a spindle shaft, and the spindle shaft. Temperature control handle connected via serrations, etc., a leg portion elastically abutting on the outer peripheral surface side of the inner cylinder of the temperature control handle, and a position capable of being normally engaged with the locking step portion of the stop ring. A safety mechanism is composed of a stopper provided with a locking convex portion arranged at the position and a safety button that is fitted and mounted on the temperature control handle body so as to be slidable in the radial direction and the lower end side is fitted to the stopper. ing.

[Action]

The stopper includes a leg portion having a self-elasticity having a substantially eight shape, and a locking convex portion arranged at a position where it can be engaged with the locking step portion of the stop ring. The stopper can be installed simply by arranging it on the outer peripheral surface side of the inner cylinder of the temperature control handle and fitting the safety button on it.
It is extremely easy because it can be done with one touch.

〔Example〕

The structure of the present invention will be described below with reference to the embodiments shown in the drawings. The same reference numerals as in the conventional case are the same members.

1 to 6 relate to an embodiment of the present invention. The shape of the stopper 11 is as shown in the perspective view of FIG. 2, and the legs 12 and 12 having self-elasticity of approximately eight shape when viewed from the front and the locking step 5b of the stop ring 5 are shown. , 5c
Corresponding to (see FIG. 7), it has a locking projection 13 arranged at a position where it can be engaged. A fitting hole 15 for engaging with the safety button 14 is formed on the upper end surface of the stopper 11. Thus, the temperature control handle 16 of this embodiment is
The overall shape is roughly elliptical when viewed from the front, and is integrally formed of heat-resistant synthetic resin or the like. Temperature control handle 16
Has an inner cylinder 18 having a serration hole 17 formed on the inner peripheral surface side in the center thereof, and is spaced apart from the inner cylinder 18 by a predetermined distance.
Are formed. As in the conventional case, the serration hole 17 of the inner cylinder 18 is externally fitted and coupled to the serration 4b of the temperature adjusting spindle shaft 4a. In FIG. 1, 20 is a screw member for fixing the temperature control handle 16 to the temperature control spindle shaft 4a. A flange 22 for attaching the cap 21 is provided on the outer end face side of the temperature control handle 16.
Are formed to project.

Thus, the stopper 11 is the inner cylinder 18 of the temperature control handle 16.
And the outer cylinder 19 are arranged. Then, the lower end side of the safety button 14 which is slidably fitted in the temperature control handle 16 in the radial direction is fitted into the fitting hole 15 of the stopper 11 by force fitting. Therefore, set the stopper 11 to the temperature control handle.
16 is arranged between the inner cylinder 18 and the outer cylinder 19, the safety button 14 is fitted into the radial groove 26 (see FIG. 4) of the temperature control handle 16, and the lower end thereof is fitted into the fitting hole 15 of the stopper 11. The main part of the safety mechanism can be assembled simply by fitting it in, and it is extremely simple because it can be done with a one-touch type.

By the way, a temperature display ring 23 shown in FIG. 5 is fitted on the outer cylinder 19 of the temperature control handle 16. In this mounted state, the bifurcated radial convex portions 24, 2 of the temperature indicating ring 23
4 is inserted into the space between the outer cylinder 19 and the inner cylinder 18 from the notch 25 (see FIG. 3 and FIG. 6) of the outer cylinder 19, and is a stopper between both the radial projections 24, 24. The locking projection 13 of 11 is sandwiched. This pinching mechanism consists of the locking projection 13 and the stop ring 5.
When the locking stepped portions 5b and 5c (see FIG. 8) of FIG. 2 come into contact with each other as the temperature control handle 16 is rotated, stress concentrates on the locking convex portion 13 in the cantilevered supporting state and cracks occur. This is for backing up because there is a risk of occurrence of damage or breakage. As is clear from the above,
The temperature display ring 23 is rotated integrally with the temperature control handle 16. Moreover, the display on the outer peripheral surface display portion of the display ring 23 corresponding to the space between the radial convex portions 24, 24 is a set temperature such as 42 ° C., for example.

Next, an operation mode of the safety mechanism configured as described above will be described. Basically, it is the same as the case of the conventional hot and cold water mixing faucet 1 shown in FIGS. 7 to 9. First, when adjusting the temperature of the discharged hot water, if the temperature adjustment handle 16 is rotated,
As a result, the temperature adjusting spindle 4 moves in the axial direction, and the axial length dimension changes. Therefore, the inflow ratio of hot water and water changes due to a spool valve (not shown), and the temperature of the discharged hot water changes.

Then, when the temperature adjusting handle 16 is rotated to a position where the discharged hot water reaches a certain set temperature, the locking projection 13 of the stopper 11 contacts the locking step 5b of the stop ring 5 (see FIG. 7). Contact. At this time, the stress due to the turning operation of the temperature control handle 16 is concentrated on the locking projection 13, and the locking projection in the cantilevered supporting state.
13 is exposed to the risk of cracks and damage. However, in this embodiment, since the radial convex portions 24, 24 of the temperature indicating ring 23 hold both end sides of the locking convex portion 13 for backing up, the temperature indicating ring 23 is used. It is possible to disperse and relax the stress on the main body side of the temperature control handle 16. That is, the locking projection 13 of the stopper 11 can be protected by the radial projections 24, 24 of the temperature indicating ring 23.

If you want to raise the temperature of the hot water that is discharged, press down the safety button 14 to compress the legs 12 with self-elasticity of the stopper 11 and stop the locking projection 13 as in the conventional case. It may be avoided toward the inner peripheral surface side of the high step portion 5e of the ring 5.

Further, when the temperature control handle 16 is rotated and returned from the state in which hot water hotter than the set temperature is discharged, the locking projection 13 of the stopper 11 is locked by the locking step 5b of the stop ring 5.
Is released from the inner peripheral surface of the high step portion 5e, is biased in the outer radial direction by the self-elastic force of the legs 12 and 12, and automatically returns to the original position (the position of the low step portion 5d). .

As described above, the safety mechanism of the present embodiment has the same basic operation mode as that of the conventional case, but has the greatest advantage in that the assembling work can be performed by the one-touch type. ing. Further, in the embodiment, the radial convex portions 24, 24 of the temperature indicating ring 23 have a function of dispersing and relaxing the stress acting on the locking convex portion 13 of the stopper 11, so that the locking convex portion can be used even during long-term use. 13 cracks,
There is no accident such as breaking.

By the way, the present invention is not limited to the above-described embodiment, and for example, the shape, size, etc. of the stopper 11, the temperature control handle 16, and the faucet body 2 can be appropriately changed.

[Effect of device]

As described above, according to the present invention, the leg portion elastically abutting on the outer peripheral surface side of the inner cylinder of the temperature control handle and the locking member arranged at a position which can be normally engaged with the locking step portion of the stop ring. Since the stopper is formed with the convex portion, the stopper is arranged on the outer peripheral surface side of the inner cylinder of the temperature control handle, and the lower end side of the safety button is forcibly fitted to the stopper, thereby the main part of the safety mechanism. Can be configured, and the work of incorporating the safety mechanism can be performed by one-touch type. That is, the work of incorporating the safety mechanism can be simplified.
Further, since the stopper has integrally formed legs, which have self-elasticity and play the role of a conventional leaf spring or coil spring, the number of parts can be reduced correspondingly, which is also advantageous in terms of cost. is there.

[Brief description of drawings]

1 to 6 relate to an embodiment of the present invention. FIG. 1 is a partial longitudinal sectional rear view of a faucet body, FIG. 2 is a perspective view of a stopper, and FIG. 3 is a stopper and FIG. 4 is a perspective view of the temperature control spindle with the safety button attached, FIG. 4 is a front view of the temperature control spindle, FIG. 5 is a perspective view of the temperature display ring, and FIG. 6 is a temperature control handle with the temperature display ring attached. Front views, FIGS. 7-9 relate to the prior art,
FIG. 7 is an exploded perspective view showing the whole of the hot and cold water mixing faucet, FIG. 8 is a perspective view showing the relationship between the temperature control spindle and the stop ring, and FIG. 9 is a faucet body with a temperature control handle attached. It is a semi-longitudinal sectional view. 2 ... Faucet body, 4 ... Temperature control spindle 4a ... Spindle shaft, 16 ... Temperature control handle 5 ... Stop ring, 5b, 5c ... Locking step part 18 ... Temperature control handle inner cylinder 12, 12 ... Leg part, 13 … Locking protrusion 11… Stopper

Claims (1)

[Scope of utility model registration request] 1. A hot water of a desired temperature by controlling the axial position of a temperature adjusting spindle mounted in the faucet body by rotating a temperature adjusting handle to adjust the mixing ratio of hot water and water. In a hot and cold water mixing faucet configured to discharge, a stop ring having an annular locking step portion arranged and fixed on the outer peripheral side of the spindle shaft, and a temperature control handle connected to the spindle shaft via serration or the like, A stopper provided with a leg portion that elastically abuts on the outer peripheral surface side of the inner cylinder of the temperature control handle, and a locking convex portion that is normally disposed at a position that can be engaged with the locking step portion of the stop ring, A safety mechanism for a hot and cold water mixing faucet, comprising a safety button that is fitted in the temperature control handle body so as to be slidable in the radial direction, and the lower end side is fitted into the stopper.