JPH0626235Y2 - Bath remote control - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a remote controller for a bath, which is installed in a bathroom for controlling and controlling hot water, reheating, hot water supply, shower and the like at hand. .

[Conventional technology]

Since the bath remote controller is installed in the bathroom, water drops, moisture, etc. corrode electronic components such as resistors, capacitors, microcomputers, switches, LSIs, and ICs in the remote controller case, resulting in significant functional deterioration such as contact failure. So, in the conventional bath remote control, the case body equipped with the printed circuit board,
A switch operating piece is joined to a lid body that is integrally formed in a punched shape leaving a thin connecting portion with a packing at the peripheral edge joint, and the function of each switch is displayed on the upper surface of the switch operating piece. The thin-film stretchable sheet is adhered to seal the inside of the case so that water drops, moisture, etc. do not enter the case.

[Problems to be solved by the device]

In the conventional bath remote control, since the case is sealed, the internal pressure of the case changes abnormally due to the temperature difference between the temperature inside the case and the ambient temperature (outside air temperature) when manufacturing and assembling the bath remote control. When the inside of the case becomes negative pressure, the switch operating piece is pulled by the negative pressure, and the push button of the switch is pressed to close the contact, which may cause an erroneous operation. For this reason, there is a strong demand for measures to eliminate the above malfunction in order to enhance its reliability.

The present invention has been made in view of such problems and demands of the conventional bath remote control, and the purpose thereof is to prevent the electronic parts from being adversely affected by the function of sealing the inside of the case. Thus, it is intended to provide a highly reliable bath remote controller in which a change in the internal pressure of the case with respect to a change in the outside air temperature is reduced by eliminating the malfunction so as to prevent a malfunction.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the bath remote controller of the present invention is provided with a ventilation hole in the remote control case that allows the inside and the outside air to communicate with each other, and a film or the like that allows air to pass through but not water, moisture, etc. A moisture-proof member made of the material is stretched by pasting or other means.

[Action]

In the bath remote controller according to the present invention configured as described above, the inside of the case and the outside air communicate with each other through the ventilation hole in which the moisture-proof member that allows air to pass but does not pass water, moisture, etc. is stretched. Therefore, even if there is a temperature difference between the inside of the case and the outside air (atmosphere), there is no pressure difference. Therefore, the case internal pressure does not abnormally increase or decrease with respect to the change of the outside air temperature. Further, the moisture-proof member stretched over the ventilation hole blocks water drops, moisture and the like. Therefore, water droplets, moisture, etc. do not enter the case through the ventilation holes.

〔Example〕

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 body 1a and a lid body 1b, which can be joined together with a packing 4 interposed at a peripheral joint portion thereof. In the case body 1a of the remote control case 1, a printed circuit board 5 on which electronic parts A such as resistors, capacitors, microcomputers, push switches, LSIs, ICs, LEDs are mounted is fixed by set screws 6, and lead wires are attached to the back surface. The lid 1b is provided with a connection terminal 7, a mounting boss portion 8 and the like, and a switch operating piece 9 for turning on and off the push switch S of the electronic component A is thinly connected to the base plate of the top plate of the lid 1b. The switch operating piece 9 can be bent inward (downward in FIG. 3) from its proximal end thin-walled connecting portion 9a against its restoring force, while leaving the portion 9a. And a push head 9b for pushing the push button 10 of the push switch S on the inner surface of the tip.
It is equipped with. Further, a plurality of space rods 11 are provided on the inner surface of the lid 1b so as to project.

Reference numeral 2 denotes a ventilation hole for communicating the inside of the remote control case 1 with the outside air, which is formed in a substantially central portion of the back wall 1c of the case body 1a. The size of the vent hole 2 is about 2 to 3φ. Reference numeral 3 denotes a moisture-proof member stretched over the ventilation hole 2, which is, for example, a nylon cloth coated with polyurethane, and has a membrane or the like having pores through which air can pass but water and moisture cannot be blocked. To use. As shown in FIG. 4, the moisture-proof member 3 is formed in a disk shape having a diameter of about 18φ, and an arbitrary adhesive 3a is applied to the peripheral edge portion other than the ventilation hole 2 portion on one surface thereof, On the adhesive 3a part, release paper 3b
When the moisture-proof member 3 is attached, the moisture-proof member 3 can be stretched over the ventilation hole 2 by flipping the release paper 3b over the front surface (inner surface) or the rear surface (outer surface) of the ventilation hole 2 and sticking it. But,
Of course, the present invention is not limited to the above embodiment.

In the figure, 12 is an elastic sheet attached to the upper surface of the lid 1b, for example, "hot water supply", "reheating", "hot",
It is formed of a thin film sheet in which the switch function of each switch operating piece 9 for operating and stopping the function of adjusting the amount of hot water such as "lubrication" is displayed on the display portion 13, and each of the display portions 13 is formed. It is positioned directly above the switch operating piece 9 and its outer edge is attached with an adhesive, and the punching groove 14 is closed with the sheet 12 to prevent water droplets or the like from entering the case.

The operation of the above configuration will be specifically described based on experimental examples.

A completely sealed remote control case (hereinafter referred to as a conventional product) and a remote control case with 2 to 3φ ventilation holes,
The pressure change inside the remote control case was measured when the outside air was changed in temperature to 0 ° C. and 40 ° C. for the ventilation hole provided with a moisture-proof member (hereinafter referred to as an improved product). The results were as follows.

An experiment was conducted by installing a bath remote control inside a constant temperature bath and installing a manometer and the like outside the bath.

The relationship between temperature and time in a constant temperature bath for 1 cycle was set under the conditions shown in Table 1 and measured. As a result, the pressure change shown in Table 2 was obtained.

2-1 Heat cycle (measurement conditions) Table 1 2-2 Pressure change Table 2 The temperature inside the case is the temperature inside the case when manufacturing and assembling the remote controller. There is a temperature difference of 8 ° C between the conventional product and the improved product, and there is a temperature difference of 8 ° C. It was decided to approximate to. The pressure change in the case measured under the heat cycle is as described above. Here, the pressure of the sample reaches the peak value immediately after the temperature change to 0 ℃ and 40 ℃ (the peak value varies depending on the speed of temperature change).
However, when the temperature is in equilibrium, the pressure in the case is naturally 0.
It becomes mmH ₂ O. The air occupies a certain volume in the case, so in the gas reaction equation PV = RT, theoretically,
When the volume is constant, the relationship between pressure and temperature is P (mmH ₂ 0) = 36.73 × T (° C). Therefore, with the conventional product, the maximum positive pressure generated is 418 mmH ₂ O and the maximum negative pressure generated is −457 mmH ₂ O.
Also, with a temperature change of 41.3 ° C, a pressure change of 875 mmH ₂ O occurs,
Theoretically, it is 41.3 x 36.73 = 1517mmH ₂ O, but this difference is because the pressure change is canceled by the volume of the manometer and its connecting pipe (because these are outside the constant temperature bath, they do not contribute to temperature change). it is conceivable that.

In the above experimental example, when the internal pressure of the case becomes −140 mmH ₂ O, the switch operating piece 9 is pulled by the negative pressure, bends inward from the thin connecting portion 9a, and pushes the pushbutton 10 of the push switch S by the tip push head 9b. Was pushed to operate the push switch S. However, since the improved product allows the air to flow between the inside of the case and the outside air through the moisture-proof member 3, the change in pressure does not occur.
140mmH ₂ O, decreased to about 1/6, and the maximum negative pressure generated is −
It was reduced to 75 mmH ₂ O, and the push switch S did not operate.

As is clear from the above experimental example, by providing the remote control case 1 with the ventilation hole 2 that communicates the inside of the case with the outside air, even if there is a temperature difference between the inside and the outside air, the pressure difference due to the inflow and outflow of air is small. Therefore, the change in the internal pressure of the case is reduced with respect to the change in the outside air temperature, and the internal pressure of the case is the pressure at which the push switch S operates under normal use conditions −140 mmH
There is no possibility of exceeding ₂ O, and the push switch S will not malfunction.

Further, since the moisture-proof member 3 which allows air to pass through the vent hole 2 but does not allow water or moisture to pass through the vent hole 2 is closed, water drops and moisture are blocked by the moisture-proof member 3 and do not enter the case through the vent hole 2. Absent.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

Allows air to pass through the ventilation holes of the remote control case,
Since a moisture-proof member that does not allow water and moisture to pass through has been installed to allow air to flow between the inside and outside air of the case, there is no pressure difference even if there is a temperature difference between the inside and outside of the case, so there is no difference in outside air temperature. The change in internal pressure of the case is reduced with respect to the change. As a result, the malfunction of the switch and the like is eliminated and the reliability is improved.

In addition, the ventilation holes allow water to pass through, but water
Since moisture and the like are not allowed to pass through, there is no intrusion of water, moisture or the like into the case, so that corrosion or functional deterioration of various electronic components in the case due to moisture or the like does not occur.

If the moisture-proof member is formed into a sheet with release paper as in the embodiment, the work of tensioning the moisture-proof member with respect to the ventilation hole can be performed efficiently, and the moisture-proof member can be easily replaced thereafter. .

[Brief description of 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, FIG. 3 is an enlarged sectional view taken along line XX of FIG. 1, and FIG. It is a partially notched perspective view of a moisture-proof member. 1 ... Remote control case, 2 ... Vent hole, 3 ... Moisture-proof member.

Claims (1)

[Scope of utility model registration request] 1. A remote control case (1) is provided with a vent hole (2) for communicating the inside with the outside air, and the vent hole (2) is made of a film or the like through which air passes but water and moisture do not pass. A remote controller for bath with a moisture-proof member (3) stretched.