JPH09243147A - Air conditioning setter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to conduct the setting operation at the night time by preventing the invasion of static electricity to improve the electrostatic noise resistance, preventing the damage of a printed board by a pushbutton operation, and illuminating a liquid crystal display unit and an operation button by a single light source. SOLUTION: A printed board 16 for placing a liquid crystal display unit 14 and a pushbutton switch 15 is contained in a case 13. The rubber sheet 42 of the switch 15 is formed of insulator, and an operation button 29 is provided integrally with an upper case 12 corresponding to an operation button part 30. The surface of the board 16 is covered with a transparent holder 17 made of insulator, and a through hole 51 for inserting the pressing part 30 of the sheet is provided at the holder 17. The peripheral edge of the hole 51 is formed as a stopper for specifying the maximum stroke of the button 29. A button display 51 protrudes from the holder 17, and is illuminated by the light of a back light unit 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning setting device of an air conditioning control device.

[0002]

2. Description of the Related Art In an air-conditioning control device, an air-conditioning setting device mounted on a wall surface or the like switches operation, stop, temperature,
The operating conditions such as air volume are set and changed. Therefore, the air-conditioning setting device includes a printed circuit board, a liquid crystal display for displaying the setting state, a push button switch, and the like, and is connected to the air-conditioning control device by a cable for signal transmission.

[0003]

However, in all of the conventional air conditioner setting devices described above, the printed circuit board 2 on which the push button switch 1 is mounted is fragile as shown in FIG. If it passes, the printed circuit board 2 may be damaged. Therefore, in order to solve such a problem, a stopper 4 is provided on the back surface of the printed circuit board 2 or the upper case 5 as shown in FIG.
However, if the stopper 4 that is a separate member is provided,
As a result, the number of parts increases and assembly work is troublesome. Further, since the printed circuit board 2 is not entirely covered with the insulator,
There is a problem that static electricity enters through the gap between the operation button 3 and the upper case 5 and the resistance against static electricity noise of the setting device is low.

Further, this type of air conditioning setting device has a disadvantage that it does not have a built-in light source for illuminating the operation button 3 of the push button switch 1 and therefore cannot perform setting operation in the dark. However, in an automobile air conditioner or the like, a structure in which the operation button 3 is illuminated by the light source 6 as shown in FIG. 7 is adopted. In that case, the light source 6 for the operation button is illuminated by the liquid crystal display 7. Since it was necessary to provide it separately from the device 8, there was a problem that the number of light sources increased and the cost became high.

The present invention has been made in order to solve the above-mentioned conventional problems. An object of the present invention is to prevent static electricity from entering by improving the static electricity noise resistance by the minimum number of parts and to operate the push button. An object of the present invention is to provide an air conditioner setting device that prevents damage to the printed circuit board due to the above. Another object of the present invention is to provide an air conditioner setting device that illuminates the liquid crystal display and the operation button with a single light source, thereby suppressing an increase in the number of light sources and enabling setting operation at night.

[0006]

In order to achieve the above object, the present invention stores a printed circuit board on which a liquid crystal display and a plurality of push button switches are mounted in a lower case, and the front side opening of the lower case is formed by an upper case. In the covered air-conditioning setting device, the push button switch is formed by a plurality of pressing portions protruding from the surface and a sheet member made of an insulator that integrally has these pressing portions and covers the surface of the printed circuit board, An elastically deformable operation button is integrally provided on the upper case corresponding to the pressing portion, the front side of the printed circuit board is covered by a holder made of an insulating material through the sheet member, and the holder is pressed by the holder. A through hole through which the portion is inserted is provided, and a peripheral portion of the through hole serves as a stopper portion that restricts displacement of the operation button. Further, in the present invention, the liquid crystal display is provided with a backlight unit on the back side, the holder is formed of a translucent material and has a button display portion, and this button display portion is located near the operation button. It is characterized in that it is exposed to the front side of the upper case and illuminated by the light of the backlight unit.

In the present invention, the holder is made of an insulator and protects the printed circuit board from static electricity. Also,
The holder functions as a stopper that limits the stroke of the operation button. Furthermore, the holder is made of transparent material,
It functions as a light guide that guides the light of the backlight unit that illuminates the liquid crystal display to the button display section. The pressing portion of the sheet member prevents static electricity from entering through the through hole of the holder.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the drawings. 1 is a front view of an air conditioning setting device according to the present invention, FIG. 2 is a side view, and FIG. 3 is III of FIG.
-III line enlarged sectional view, FIG. 4 is an IV-IV line enlarged sectional view of FIG. 1, and FIG. 5 is an exploded perspective view. In these figures,
The air conditioner setting device 10 is provided with a box-shaped case 13 including a lower case 11 and an upper case 12, and a liquid crystal display 14 and a printed circuit board 16 having a plurality of push button switches 15 and the like housed therein, and this print A configuration is adopted in which the surface of the substrate 16 is covered by the holder 17 almost entirely.

The lower case 11 has a recessed portion 2 at the center thereof.
The rear side protruding portion 11A is fitted into the mounting hole 23 formed in the wall 22 and the upper and lower ends are fixed to the wall surface by the set screw 24. Further, an opening 25 is formed near the lower part of the back surface of the back surface side protruding portion 11A.

The upper case 12 is a lower case 1.
It is removably attached to the front opening of No. 1 by the engagement of the engaging portions 26 and 27. A display window 28 of the liquid crystal display 14 is formed slightly above the center of the surface of the upper case 12, and three operation buttons 29 are integrally formed below the display window 28 in the width direction of the upper case 12 with a required space. It is installed side by side. The operation button 29 is provided corresponding to each pressing portion 30 of the push button switch 15 and is used to operate, stop, set or change the temperature of the air control device, and is elastically provided integrally with the upper case 12. It is integrally provided on the free end side of the deformable support leg 31. An operation button 32 for adjusting the air volume is integrally provided near the lower surface of the upper case 12. The operation button 32 has the same cantilever support structure except that the operation button 32 is smaller in shape than the operation button 29. An opaque sheet 33 such as a synthetic resin or a metal plate is attached to the surface of the upper case 12, and the display window 28 and the operation buttons 29, 29 are attached to the surface of the sheet 33.
Apertures 34, 35, 36 are formed corresponding to 31, and a character 37 for operating / stopping, setting, air volume and a symbol 38 indicating a temperature increasing / decreasing direction are printed. In addition,
The sheet 33 covers the holes formed to form the operation buttons 29 and 32 on the surface of the upper case 12.

The liquid crystal display 14 has a backlight unit 40 as a light source on the back side and is fixed to the front side of the printed circuit board 16 via a rubber connector 41 together with the push button switch 15 by an adhesive. .
The push button switch 15 includes a rubber sheet 42 as a sheet member by using a rubber contact type switch. The rubber sheet 42 is made of an insulating material, and the pressing portion 30 is integrally provided on the front surface of the rubber sheet 42. A movable contact (not shown) is formed by printing on the back surface side of the pressing portion 30. It is formed on the surface of the printed circuit board 16. In this case, the reason why the rubber sheet 42 is made of insulating rubber is that the printed circuit board 16 is protected,
This is to prevent static electricity from entering through a through hole of the holder 17, which will be described later.

On the other hand, on the back side of the printed circuit board 16, an electric circuit of the air conditioning setting device 10 is formed by printing, and various electronic parts such as a transistor, an IC and a modular jack 45 are mounted. The modular jack 45 is exposed to the outside through the opening 25 of the lower case 11, and a modular jack provided at one end of a cable (not shown) that connects the air conditioning controller and the air conditioning setting device 10 is connected from the rear side. And the printed circuit board 16
The back surface is protected by a protective sheet 46, and is fixed to the inner surface of the upper case 12 by a plurality of setscrews 47.

The holder 17 covering the surface of the printed circuit board 16 is made of transparent synthetic resin. Such a holder 17 is provided with the push button switch 15
By functioning as an insulator together with the rubber sheet 42, it has a function of preventing static electricity from entering the inside of the case. On the front surface side of the holder 17, a rectangular step portion 50 that fits into the display window 28 of the upper case 12, a plurality of through holes 51 through which the pressing portion 30 of the rubber sheet 42 is inserted, and three buttons. A display unit 52 is provided. From the through hole 51 to the holder 1,
7 is projected forward, and its tip end surface is in contact with the back surface of the operation button 29 as shown in FIG. An appropriate gap G (FIG. 4) is provided between the operation button 29 and the peripheral surface of the through hole 51 on the surface of the holder 17. The gap G defines the maximum stroke of the operation button 29. Therefore, the surface of the peripheral portion of the through hole 51 is the operation button 2
9 functions as a stopper 53. The button display section 52
Is formed into a plate shape and has an opening 5 in the upper case 12.
4 is projected forward and positioned on the left side of each operation button 29. The button display portion 52 shines brightly when the light of the backlight unit 40 is guided through the holder 17, and illuminates the operation button 29.
Therefore, the holder 17 also functions as a light guide. The holder 17 is locked to the surface of the printed board 16 by engaging a plurality of elastic engaging pieces 55 projecting on the periphery of the holder 17 with the engaging holes 56 formed in the printed board 16. It

In the air conditioner setting device 10 having the above structure, the holder 17 for covering the printed circuit board 16 is made of an insulating material and has a function of preventing static electricity from invading together with the rubber sheet 42. Can be improved, and the electric circuit can be prevented from being damaged by static electricity. Further, since a part of the holder 17 functions as the stopper 53 of the operation button 29, it is possible to prevent the printed board 16 from being damaged when the operation button 29 is operated by an excessive pressing force. Moreover, since it is not necessary to provide a stopper formed of a separate member, the number of parts and the number of assembling steps do not increase. Further, the holder 17 is transparent and also functions as a light guide for guiding the light from the backlight unit 40 to the button display portion 52, so that it is not necessary to provide a light source for the operation button and the operation button 29 at night. To secure the lighting of. Further, the operation button 29 provided integrally with the upper case 12 has a larger stroke than that of the seat key and is excellent in operation feeling.

FIG. 6 is a schematic sectional view showing another embodiment of the present invention, in which the lower case is omitted. In this embodiment, a backlight unit as a light source for illuminating the liquid crystal display 14 is not provided. Therefore, the holder 17 is not provided with a button display section for displaying the position of the operation button 29. Since other configurations are the same as those of the above-described embodiment, the same components and the like are designated by the same reference numerals and the description thereof will be omitted.

Even in such a structure, the holder 17
Covers the printed circuit board 16 to prevent intrusion of static electricity and regulates the maximum stroke of the operation button 29, thus improving the static electricity noise resistance of the air conditioner setting device and damaging the printed circuit board 16 due to excessive pressing force. Can be prevented. In the present embodiment, since the liquid crystal display 14 is not back-illuminated, the holder 17 may be an insulator having no translucency. In that case, an opening may be provided at a position corresponding to the liquid crystal display 14 to expose the display surface to the outside.

[0017]

As described above, according to the present invention, a printed circuit board on which a liquid crystal display and a plurality of push button switches are mounted is housed in a lower case, and the front side opening of the lower case is covered by an upper case. In the container, the push button switch is formed by a plurality of pressing portions protruding from the surface and a sheet member made of an insulator that integrally has these pressing portions and covers the surface of the printed circuit board, and corresponds to the pressing portions. An elastically deformable operation button is integrally provided on the upper case, and the front surface side of the printed circuit board is covered by a holder made of an insulating material through the sheet member.
This holder is provided with a through hole through which the pressing portion of the sheet member is inserted, and the peripheral portion of this through hole serves as a stopper portion for restricting the displacement of the operation button. It is possible to improve noise characteristics and prevent damage to the printed circuit board due to excessive pressing force. Moreover, since it is not necessary to provide a stopper formed of a separate member, the number of parts and the number of assembling steps do not increase.

Further, according to the present invention, a backlight unit is provided on the back side of the liquid crystal display, the holder is made of a translucent material to provide a button display section, and the button display section is located near the operation button. As described above, the front side of the upper case is exposed to illuminate with the light of the backlight unit. Therefore, it is not necessary to provide a light source for the operation button, and the setting operation can be performed at night.

[Brief description of drawings]

FIG. 1 is a front view of an air conditioning setting device according to the present invention.

FIG. 2 is a side view.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is an enlarged sectional view taken along the line IV-IV of FIG. 1;

FIG. 5 is an exploded perspective view.

FIG. 6 is a schematic cross-sectional view showing another embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view showing a conventional example of a setting device for air conditioning.

FIG. 8 is a schematic cross-sectional view showing another conventional example of a setting device for air conditioning.

[Explanation of symbols]

10 ... Air-conditioning control device, 11 ... Lower case, 12 ... Upper case, 13 ... Case, 14 ... Liquid crystal display, 15 ... Push button switch, 16 ... Printed circuit board, 17 ... Holder, 2
9 ... Operation button, 30 ... Pressing part, 40 ... Backlight unit, 42 ... Rubber sheet, 51 ... Through hole, 52 ... Button display part.

Claims (2)

[Claims] 1. An air conditioner setting device in which a printed circuit board having a liquid crystal display and a plurality of push button switches is housed in a lower case, and the front side opening of the lower case is covered by an upper case. Formed by a plurality of protruding pressing portions and a sheet member made of an insulator that integrally has these pressing portions and covers the surface of the printed circuit board, and is elastically deformable in the upper case corresponding to the pressing portions. An operation button is integrally provided, the front side of the printed circuit board is covered by a holder made of an insulating material through the sheet member, and a through hole for inserting the pressing portion of the sheet member is provided in the holder. An air conditioner setting device, characterized in that a peripheral portion is a stopper portion for limiting displacement of the operation button. 2. The air conditioner setting device according to claim 1,
The liquid crystal display is equipped with a backlight unit on the back side, the holder is made of a translucent material and has a button display section, and this button display section is placed on the front side of the upper case so as to be located near the operation buttons. An air conditioner setting device, which is exposed and illuminated by light from the backlight unit.