JP2753974B2 - Remote control for bath - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote controller for a bath, which is installed in a bathroom to control and control hot water supply, reheating, hot water supply, shower operation and the like at hand.

[0002]

2. Description of the Related Art Since a bath remote control is installed in a bathroom, electronic components such as a resistor, a capacitor, a microcomputer, a switch, an LSI, an IC, etc. in a remote control case are corroded by water drops, moisture, etc., and functions such as a defective contact thereof are provided. Deterioration is remarkable. Therefore, in a conventional bath remote controller, a case body having a printed circuit board and a lid body for integrally forming a switch operating piece in a punched shape while leaving a thin connection portion are joined to each other with a packing interposed at a peripheral joint portion, and On the upper surface of the switch operating piece, a thin film-like elastic sheet indicating the function of each switch etc. is attached to seal the inside of the case,
It is configured so that moisture and the like do not enter the case.

[0003]

In a conventional bath remote controller, since the inside of the case is sealed, the temperature difference between the temperature in the case and the ambient temperature (outside air temperature) at the time of manufacturing and assembling the bath remote controller. As a result, when the internal pressure of the case abnormally changes and the inside of the case becomes a negative pressure, there is a problem that the switch operating piece is pulled by the negative pressure, pressing the push button of the switch, closing the contact and malfunctioning. . For this reason, there is a strong demand for measures to eliminate the malfunction in order to enhance the reliability. The present invention has been made in view of such problems and demands of a conventional bath remote controller, and has as its object to prevent the sealing in a case from adversely affecting electronic components such as functional deterioration. This is intended to reduce the change in the internal pressure of the case with respect to the change in the outside air temperature, eliminate malfunction, and provide a highly reliable bath remote control.

[0004]

In order to achieve the above object, a remote controller for a bath according to the present invention comprises:
A ventilation hole communicating the inside and outside air is provided, and a moisture-proof member made of a film or the like that allows air to pass through but does not allow water to pass through the ventilation hole is attached to the ventilation hole by other means.

[0005]

In the bath remote controller according to the present invention constructed as described above, the inside of the case and the outside air communicate with each other through a ventilation hole in which a moisture-proof member that allows air to pass but water does not pass is provided. Therefore, even if there is a temperature difference between the inside of the case and the outside air (atmosphere), no pressure difference occurs. Therefore, the case internal pressure does not become abnormally high or low with respect to the change in the outside air temperature. In addition, water droplets are blocked by a moisture-proof member stretched over the ventilation hole. Therefore, water droplets do not enter the case from the ventilation holes.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bath remote controller according to the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a remote control case, which is composed of a case main body 1a and a lid 1b, and which can be joined to each other by interposing a packing 4 at a peripheral joint thereof. Remote control case 1
A printed circuit board 5 on which electronic components A such as a resistor, a capacitor, a microcomputer, a push switch, an LSI, an IC, and an LED are mounted and fixed with set screws 6 inside the case body 1a, and a lead wire connection terminal 7, A mounting boss 8 and the like are provided, and a switch operating piece 9 for turning on and off the push switch S of the electronic component A is left on the top plate of the lid 1b, and a thin connecting portion 9a is left at the base end. The switch actuating piece 9 can be bent inward (downward in FIG. 3) from its proximal thin connecting portion 9a against its restoring force. And a push head 9b for pushing the push button 10 of the push switch S. In addition, a plurality of space rods 11 protrude from the inner surface of the lid 1b. Reference numeral 2 denotes a ventilation hole for communicating the inside of the remote control case 1 with the outside air, and is formed substantially in the center of the back wall 1c of the case body 1a.
The size of the ventilation hole 2 is about 2 to 3φ. 3
Is a moisture-proof member stretched over the ventilation hole 2 and is made of, for example, a nylon fabric coated with polyurethane, and uses a membrane having pores that allow air to pass therethrough but block water but do not. This moisture-proof member 3 is formed in a disk shape of about 18φ as illustrated in FIG. 4, and an optional adhesive 3a is attached to the other peripheral portion except for the vent 2 on one surface.
Is applied, and a release paper 3b is adhered to the adhesive 3a, whereby the moisture-proof member 3 is attached by turning the release paper 3b over the front surface (inner surface) or the rear surface (outer surface) of the ventilation hole 2. For example, the moisture-proof member 3 can be stretched in the ventilation hole 2. However, it is needless to say that the present invention is not limited to the above embodiment. In addition,
In the figure, reference numeral 12 denotes a stretchable sheet adhered to the upper surface of the lid 1b, for example, “hot water supply”, “reheating”, “hot”,
It is formed of a thin sheet showing the switch function and the like of each switch actuating piece 9 for operating and stopping the function such as adjustment of the amount of hot water such as “tepid” on the display portion 13. The outer edge portion is adhered with an adhesive and positioned just above the switch operating piece 9 to block the punching groove 14 with the sheet 12 to prevent water droplets from entering the case. The operation of the above configuration will be specifically described based on experimental examples. The remote control case is completely sealed (hereinafter referred to as the conventional product) and the remote control case has two
A pressure change in the remote control case when the outside air temperature changes from 0 ° C. to 40 ° C. went. The results were as follows. The experiment was conducted by installing a bath remote control in a constant temperature bath and installing a manometer and the like outside the bath. The relationship between the temperature and time in the thermostat in one cycle was set under the conditions shown in Table 1 and measured. As a result, a pressure change as shown in Table 2 was obtained.

2-1 Heat cycle (measurement conditions)

[Table 1] │ │ Temperature (℃) │ Time (min) │ ├─────┼─────┤ │ 0 → 40│ 30 │ ├─ │ │40 │ 60 │ │ │40 → 0│ 30 │ ├─────┼─────┤ │ 0 │ 60 │ └─────┴─────┘

2-2 Pressure change

[Table 2] ┌──────────┬─────┬─────┐ │ │ Conventional product │ Improved product │ ├──────────┼── │ │ Temperature in the case (Pressure │ │ │ │ Set at 0mmH ₂ O) │ 19 ℃ │ 27 ℃ │ ├──────────┼──── │ │ Pressure in case │ 418mmH ₂ O │ 65mmH ₂ O │ │ Peak value (positive pressure) │ (39.5 ℃) │ (39 ℃) │ ├───────── │ │ Pressure in case │-457mmH ₂ O │ -75mmH ₂ O │ │ Peak value (negative pressure) │ (-1.8 ℃) │ (0 ℃) │ └ ──────────┴─────┴─────┘

The temperature in the case is the temperature in the case when the remote controller is manufactured and assembled. The temperature difference between the conventional product and the improved product is 8 ° C. Was determined to approximate the use condition. The pressure change in the case measured under the heat cycle was as described above. Here, the pressure of the sample reaches the peak value immediately after the temperature change to 0 ° C. and 40 ° C. (differs at the peak depending on the speed of the temperature change), but when the temperature reaches an equilibrium state, the pressure in the case naturally becomes It becomes 0 mmH ₂ O. The air occupies a constant volume in the case, and in the gas reaction formula PV = RT, the relationship between the pressure and the temperature theoretically when the volume is constant is: ΔP (mmH ₂ O) = 36.73 × ΔT (° C.) ) Holds. Therefore, in the conventional product, generating a maximum positive pressure 418mmH ₂ O, the generated maximum negative pressure - 457MmH has a ₂ O, also becomes a pressure change 875mmH ₂ O at a temperature variation of 41.3 ° C., theoretically, 41.3 × 36.73 = 1517mmH becomes a ₂ O, this difference is considered to be because the pressure changes by the volume of the manometer and its connection pipe is canceled (for they are not involved in a temperature change from outside the constant temperature bath). In the above experiment, when the casing pressure becomes -140 mmH ₂ O, push button of the push switch S is pulled switch actuating piece 9 is in its negative pressure from the thin connection section 9a at its tip押頭9b bent inwardly Push 10 to push switch S
Activated. However, since the improved products has allowed the flow of air through the moisture barrier member 3 and the outside air case reduced pressure change in the 140 mmH ₂ O and approximately 1/6, also, the generation maximum negative pressure - With a sharp decrease to 75mmH ₂ O, there is no longer any possibility that the push switch S will operate. As is clear from the above experimental examples, the vent hole 2 communicating the inside of the case with the outside air is provided in the remote control case 1 so that even if there is a temperature difference between the inside of the case and the outside air, the pressure difference is small due to the inflow and outflow of air. Therefore, the change in the internal pressure of the case with respect to the change in the outside air temperature is reduced,
Under normal operating conditions, the internal pressure of the case
There you it without any of the pressure -140 mmH ₂ O or more operating and does not operate the push switch S is erroneous. Further, a moisture-proof member 3 through which air passes but water does not pass through the vent hole 2.
Therefore, the water drops are blocked by the moisture-proof member 3 and do not enter the case through the ventilation holes 2.

[0010]

Since the present invention is configured as described above, it has the following effects. A moisture-proof member that allows the passage of air through the vent hole of the remote control case but does not allow water to pass through it allows air to flow between the inside and the outside of the case, so there is no temperature difference between the inside of the case and the outside air. However, since no pressure difference occurs, the change in the internal pressure of the case is reduced with respect to the change in the outside air temperature. Thus, the malfunction of the switch and the like is eliminated, and the reliability is improved. Further, since the ventilation holes allow air to pass through but do not allow water to pass through, the water does not penetrate into the case at all. Therefore, corrosion and functional deterioration of various electronic components in the case due to moisture do not occur. When the moisture-proof member is formed in a sheet shape with release paper as in the embodiment, the work of stretching the moisture-proof member to the ventilation hole can be efficiently performed, and the subsequent replacement of the moisture-proof member can be easily performed. .

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a bath remote controller according to the present invention.

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line XX of FIG. 1;

FIG. 4 is a partially cutaway perspective view of a moisture-proof member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Remote control case, 2 ... Vent hole, 3 ... Moisture-proof member

Claims (1)

(57) [Claims] A bath for operating a switch (S) on a printed circuit board (5) housed in a remote control case when an operation surface provided on the remote control case (1) is pushed and displaced inward. In the remote controller, a ventilation hole (2) is provided in the remote control case (1) for communicating the inside with the outside air, and a moisture-proof member made of a film or the like through which air passes but water does not pass. Remote control for bath with (3).