JP2002023955A - Composite switch sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide input parts to be produced at a low cost by compositely forming touch panel switches and contact switches on the same sheet by simple constitution, simplifying circuit constitution and reducing the number of parts. SOLUTION: A composite switch sheet forming resistor film type touch panel switches and contact switches is composed of oppositely arranging an insulating substrate and an insulating resin film and forming mutually matched transparent electrodes and mutually matched contact electrodes between the substrate and the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input component used in various electronic devices such as a mobile communication device and a measuring device having a display device such as a liquid crystal display. It relates to the input component to be configured.

[0002]

2. Description of the Related Art Touch panel switches, which are input components, are mainly used in various fields as simple input components in combination with screens of display devices such as liquid crystal displays. Among them, resistive touch panel switches are widely used in portable electronic devices because they are lightweight, have low power consumption, and can be manufactured at low cost.

As shown in FIG. 5, for example, a resistive touch panel switch has a structure in which a transparent electrode 1 is formed on two resin films 4 and a dot spacer 6 made of resin or a spacer 5 made of double-sided adhesive tape. In this configuration, the transparent electrodes are opposed to each other with the intermediary of the transparent electrode.

[0004] Resistive touch panel switches include:
There are two types: matrix type and analog type. In the matrix type, the transparent electrodes are formed in a grid-like pattern,
When the resin film is pressed with a finger or the like, the electrodes on the two opposite resin films come into contact and conduct, and the coordinates of the contact point are output according to the conducting position.

In the analog type, when a different voltage is applied to both ends of a transparent electrode to form a potential gradient, and when the resin film is pressed with a finger or the like, the electrodes on the two opposite resin films come into contact with each other and conduct. The coordinates of the contact point are output based on the potential of the electrode.
Compared with the latter, the latter analog type is often used because the formation of a pattern on the transparent electrode is unnecessary and the circuit for the transparent electrode is simple.

[0006]

However, the touch panel switch is light in weight, consumes little power, and can be manufactured at low cost. However, the operation load until the transparent electrodes come into contact with each other during the pressing operation is light, and the touch panel switch is erroneously operated or erroneously operated. There was a problem that input etc. occurred.

[0007] In addition, an important switch such as a power key may require a click feeling at the time of input operation. Therefore, a combination of a contact switch having a click feeling function and a touch panel switch is desired. However, when separately manufactured and combined, the configuration and circuit arrangement of the entire switch become complicated, which leads to an increase in the number of parts and an increase in cost. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a simple structure in which a touch panel switch and a contact switch are combined on the same sheet with a simple structure, thereby simplifying the circuit, reducing the number of parts, and reducing the number of parts. It is intended to provide input parts that can be produced at a low cost.

That is, an insulating substrate and an insulating resin film are arranged to face each other, and transparent electrodes and contact electrodes are formed on the inner surface thereof in alignment with each other. Are composite switch sheets each formed with:

[0010] Further, there is provided a composite switch sheet in which a resin film at a portion of a contact switch is curved in a dome shape, and a contact electrode is formed inside the dome shape.

Further, an insulating substrate and an insulating resin film are disposed to face each other, and a transparent electrode is formed on a part of the inner surface where the insulating substrate and the insulating resin film face each other so that the transparent electrodes are aligned with each other. A resistive touch panel switch is formed, and in another part, a contact electrode is formed on an insulating substrate, and an elastic molded body having a click feeling is inserted thereon to form a contact switch. Composite switch sheet.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a typical configuration of the present invention. The composite switch sheet of the present invention includes a common insulating substrate 3 on which a transparent electrode 1 and a contact electrode 2 are formed.
A common insulating resin film 4 on which a transparent electrode 1 and a contact electrode 2 are formed is disposed such that the transparent electrodes and the contact electrodes of the insulating substrate and the resin film face each other via a spacer 5. And a composite switch sheet provided with a resistive touch panel switch and a contact switch on one sheet.

The resistive touch panel switch of the present invention may be either a matrix type or an analog type, but the latter type is preferable in consideration of workability and cost. The transparent electrode is formed by depositing ITO (indium tin oxide) by evaporation or sputtering, or by printing an ink containing ITO powder.
A TO film can be used.

The contact switch of the present invention is turned on by pressing.
A switch for performing an OFF input, for example, a membrane switch, a switch using a molded product having a click feeling such as a metal disc spring or a resin film curved and deformed in a dome shape, and a thin bend in a pressing portion and its periphery. A switch or the like made of synthetic rubber or resin having a portion formed thereon, and these may be used in combination.

The insulating substrate of the present invention is not particularly limited as long as it has insulating properties and transparency, and suitable materials include glass and resin film. The resin film of the present invention is not particularly limited as long as it has insulation and transparency, and preferably has a thickness of 50 μm to 200 μm. For example, a polyethylene terephthalate film, a polyethylene naphthalate film, a polycarbonate film and the like can be mentioned. As the contact electrode, in addition to the above-described transparent electrode, a known electrode using silver ink, carbon ink, or the like can be used.

[0016]

Embodiment 1 FIG. 2 is a sectional view of a composite switch sheet according to the first embodiment. An ITO film was formed as a transparent electrode 1 on a 100 μm polyethylene terephthalate film as the insulating substrate 3 by vapor deposition, and unnecessary portions of the ITO film were removed by etching. X-axis and Y-axis resistance reading terminals are formed in the touch panel switch portion on the insulating substrate 3 by screen printing using silver ink,
The contact electrode 2 was formed on the contact switch portion. Further, an ultraviolet curable ink was applied on the insulating substrate at the touch panel switch portion to form a dot spacer 6.

On the other hand, an ITO film was formed as a transparent electrode 1 on a 100 μm polyethylene terephthalate film as a resin film 4 by vapor deposition, and unnecessary portions of the ITO film were removed by etching. X-axis and Y-axis resistance reading terminals were formed in the touch panel switch portion on the insulating substrate 3 by screen printing using silver ink. On the back surface of the resin film 4 at the contact switch portion, a display section 9 for characters and figures was formed.

After a metal disc spring 7 is adhered to the contact electrode 2 on the insulating substrate 3 on the insulating substrate 3 with an adhesive tape, the transparent electrode on the insulating substrate and the transparent electrode of the polyethylene terephthalate film face each other. Thus, the composite switch sheet was aligned and fixed via the spacer 5 to obtain a composite switch sheet. As a result, the touch panel switch and the contact switch are formed in the same sheet, and the spacer interposed between the contact electrodes of the touch panel switch and the contact switch is shared, thereby simplifying the circuit and reducing the number of components, thereby achieving a configuration. Simplified.

[0019]

Second Embodiment FIG. 3 is a sectional view of a composite switch sheet according to a second embodiment. An ITO film was formed as a transparent electrode 1 on a 100 μm polyethylene terephthalate film as the insulating substrate 3 by vapor deposition, and unnecessary portions of the ITO film were removed by etching. The X-axis and Y-axis resistance reading terminals were formed on the touch panel switch portion on the insulating substrate by screen printing using silver ink, and the contact electrodes 2 were formed on the contact switch portion. Further, an ultraviolet curable ink was applied on the insulating substrate at the touch panel switch portion to form a dot spacer 6.

On the other hand, on a 100 μm polyethylene terephthalate film as the resin film 4, the contact electrode of the contact switch portion is deformed into a pressed portion shape at 130 ° C. for 90 seconds, and a transparent thermoplastic resin is injected from the back side. The pressed portion 10 was formed by injection. On the touch panel portion, X-axis and Y-axis resistance reading terminals are formed on the touch panel switch portion on the insulating substrate 3 by screen printing using silver ink, and an ITO powder-containing ink which is a transparent conductive ink is screen-printed. And transparent electrode 1
Was formed.

A dome-shaped molded body 8 made of a resin film having silver ink printed on the inside of the dome is adhered on the contact electrode on the insulating substrate at the contact switch portion with an adhesive tape. The transparent electrode of the polyethylene terephthalate film and the upper transparent electrode were aligned and fixed via the spacer 5 so as to face each other to obtain a composite switch sheet. As a result, the touch panel switch and the contact switch are formed in the same sheet, and the spacer interposed between the contact electrodes of the touch panel switch and the contact switch is shared, thereby simplifying the circuit and reducing the number of components, thereby achieving a configuration. Simplified.

[0022]

Third Embodiment FIG. 4 is a sectional view of a composite switch sheet according to a third embodiment. A transparent electrode 1 was formed by screen-printing an ITO powder-containing ink as a transparent conductive ink on a 100 μm polyethylene terephthalate film as an insulating substrate 3, and a contact electrode 2 was formed on a contact switch portion. X-axis and Y-axis resistance reading terminals were formed on the touch panel switch portion on the insulating substrate by screen printing using silver ink. In addition, UV curable ink is applied on the insulating substrate of the touch panel switch,
The dot spacer 6 was formed.

On the other hand, a transparent electrode 1 was formed by screen printing a transparent conductive ink containing ITO powder on a 100 μm polyethylene terephthalate film as the resin film 4, and the contact electrode 2 was formed on the contact switch portion. X-axis, Y-axis by screen printing using silver ink
An axial resistance reading terminal was formed. Thereafter, the contact switch portion was subjected to a bending deformation process at 130 ° C. for 90 seconds to obtain a dome-shaped molded body 8. The alignment is performed via the spacer 5 so that the transparent electrode on the insulating substrate and the transparent electrode of the polyethylene terephthalate film face each other, and the contact electrode on the insulating substrate and the contact electrode of the polyethylene terephthalate film face each other. The composite switch sheet was fixed to obtain a composite switch sheet.

Thus, the touch panel switch and the contact switch are formed in the same sheet, and the spacer interposed between the touch panel switch and the contact electrode of the contact switch is shared, thereby simplifying the circuit and reducing the number of parts. , Could simplify the configuration.

[0025]

As described in detail above, the present invention provides
By forming a touch panel switch and a contact switch in the same sheet and sharing a spacer interposed between each contact electrode of the touch panel switch and the contact switch,
The configuration has been simplified. Another object of the present invention is to provide an input component that can be manufactured at low cost by simplifying the circuit and reducing the number of components. Further, an input device having excellent operability is provided by a contact switch having a click feeling.

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is a sectional view of the present invention.

FIG. 3 is a sectional view of the present invention.

FIG. 4 is a sectional view of the present invention.

FIG. 5 is a cross-sectional view of a conventional touch panel switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent electrode 2 Contact electrode 3 Insulating substrate 4 Resin film 5 Spacer 6 Dot spacer 7 Metal disc spring 8 Molded object 9 Display part 10 Press part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (reference) H01H 13/70 H01H 13/70 EC 36/00 36/00 Y F term (reference) 5B020 CC06 CC12 CC12 DD02 DD30 FF17 GG01 GG13 5B087 AA00 AB11 AE09 CC12 CC16 CC37 5G006 AA02 AA04 AB25 AZ02 CD06 DB03 FB04 FB31 5G023 AA12 CA19 CA30 CA50 5G046 AA01 AA11 AB02 AC40 AE02

Claims (3)

[Claims] An insulative substrate and an insulative resin film are opposed to each other, and transparent electrodes and contact electrodes are formed on inner surfaces thereof so as to be aligned with each other. And a composite switch sheet formed with each. 2. The resin film at the position of the contact switch,
The composite switch sheet according to claim 1, wherein the composite switch sheet is formed in a dome-like shape, and a contact electrode is formed inside the dome. 3. An insulative substrate and an insulative resin film are disposed to face each other, and a transparent electrode is formed on a part of an inner surface of the insulative substrate and the insulative resin film facing each other so as to be aligned with each other. A resistive touch panel switch is formed, and in another part, a contact electrode is formed on an insulating substrate, and an elastic molded body having a click feeling is inserted thereon to form a contact switch. Composite switch sheet.