JPH11296287A - Tablet input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve tightness for sealed liquid without increasing the size of a tablet input device which is provided with liquid sealed between an upper movable electrode and a lower fixed electrode opposed to each other in order to improve visibility. SOLUTION: A transparent reinforcing film 7 is stuck to the outer surface of an upper movable electrode 1 consisting of a transparent film, a transparent reinforcing film 8 is stuck to the outer surface of a lower fixed electrode 2 consisting of transparent glass, both the electrodes 1, 2 are opposed to each other at a prescribed interval and fixed and held by a distance piece 4 applied to all peripheral parts, and liquid 5 is sealed in an inner space. A sealing material 6 having a sufficient thickness is applied to the whole peripheral end surfaces of the film 7, the electrode 1, the piece 4, the electrode 2, and the film 8 and cured, so that the whole parts are integrally formed and the filled solution 5 is sealed tight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inputting characters, symbols, figures, and the like using a pen, a fingertip, and other input means.
Involved in a tablet input device (small digitizer) for selecting and inputting instructions and instructions, and more specifically, liquid was sealed between the upper movable electrode and the lower fixed electrode facing each other to improve visibility. It relates to a tablet input device. The tablet input device targeted by the present invention is mainly a CRT (cathode ray tube) in a personal computer, a word processor, a portable information terminal, a communication device, and the like.
This is a so-called “touch panel” which is provided in a state of being superimposed on the surface of a display device such as an LCD or a liquid crystal display (LCD). However, the present invention is not limited to such a case, and is applied to any device / apparatus.

[0002]

2. Description of the Related Art Various types of tablet input devices, such as a pressure-sensitive type, a capacitance type, and an electromagnetic induction type, are known. The resistance film method of the resistance pressure-sensitive method is widely used.

FIG. 7 shows a schematic sectional structure of a resistive tablet input device according to the prior art. In both cases, a transparent upper movable electrode 1 and a lower fixed electrode 2 are arranged to face each other with an air layer 3 interposed therebetween, and both electrodes 1 and 2 are fixed and held in a state where the distance is regulated by a distance piece 4 interposed in the peripheral portion. ing. By pressing a desired position of the upper movable electrode 1 with a pen or the like, the upper movable electrode 1 is depressed and brought into contact with the lower fixed electrode 2, and the resistance value in the X direction and the resistance in the Y direction corresponding to the position of the contact point. By detecting a voltage that depends on each value, the X-direction coordinates and the Y-direction coordinates are detected. The upper movable electrode 1 is usually made of a flexible film because it needs to be depressed by pressing, and the lower fixed electrode 2 is usually made of glass because it needs to have strength.

[0004] In the case of FIG. 7, the presence of the air layer 3 causes a difference in the refractive index of each layer, and light is reflected at the interface, so that the transmittance is reduced and the visibility of the display device is deteriorated. is there. Therefore, a resistive tablet type tablet input device having a structure as shown in FIG. 8 has been proposed (Japanese Utility Model Application Laid-Open No. 59-9852).
No. 8). A liquid 5 having a refractive index substantially equal to that of both electrodes between transparent upper movable electrode 1 and lower fixed electrode 2
Is sealed and sealed with a distance piece 4 and a sealing material 6 for preventing liquid leakage. This is a liquid-filled tablet input device. The visibility is improved because the refractive index is adjusted.

[0005]

In the liquid-filled / resistance film type tablet input device shown in FIG. 8, two electrodes of different materials, ie, an upper movable electrode 1 made of a film and a lower fixed electrode 2 made of a glass, are sealed. 6 is poor in adhesiveness because it is bonded via, and the sealing material 6 is largely attached to the distance piece 4, and the amount of the sealing material 6 attached to both the electrodes 1 and 2 is small. Therefore, the reliability of the sealing is low, and there is a possibility of liquid leakage. Leakage can contaminate the display and other parts and cause malfunctions. Further, since the upper movable electrode 1 and the lower fixed electrode 2 have different coefficients of thermal expansion, there is a possibility that wrinkles may occur in the upper movable electrode 1 made of a thin film. In order to avoid liquid leakage, it is only necessary to move the peripheral portion away from the input area, but this causes a problem that the overall size becomes too large.

The present invention has been made in view of such circumstances, and a tablet input device in which liquid is sealed between an upper movable electrode and a lower fixed electrode facing each other to improve visibility. The purpose of the present invention is to increase the hermetic sealing property of the sealed liquid and suppress the increase in size.

[0007]

The tablet input device according to the first aspect of the present invention has the following configuration. That is, on the assumption that the upper movable electrode and the lower fixed electrode are opposed to each other at a predetermined interval and a liquid is sealed between the two electrodes, some sealing is performed on the upper movable electrode, the lower fixed electrode, or both electrodes. The auxiliary body is brought into contact, and a sealing material is adhered over the apparatus main body and the sealing auxiliary body to prevent liquid leakage. The use of the sealing auxiliary body can greatly increase the adhesion area of the sealing material, increase the adhesion amount of the sealing material, and improve the sealing ability. It is not necessary to keep the peripheral part away from the input area in order to avoid liquid leakage, thereby suppressing an increase in size.

According to a second aspect of the present invention, in the tablet input device, any one of a transparent film, an icon sheet, an anti-reflection film, a polarizing plate and a retardation plate is used as the sealing auxiliary body. The body is attached to the outer surface of the electrode. It can take various forms depending on the purpose of use.

According to a third aspect of the present invention, there is provided a tablet input device in which a sealing auxiliary body is attached to both the outer surface of the upper movable electrode and the outer surface of the lower fixed electrode. A sufficient amount of the sealing material can be applied not only to the peripheral end surfaces of the upper movable electrode and the lower fixed electrode but also to the peripheral end surfaces of both the sealing auxiliary members, and the hermetic sealing performance is further improved. Even if the upper movable electrode or the lower fixed electrode is destroyed due to excessive load or abnormal shock, liquid leakage does not reach the outside due to the presence of the film-shaped sealing auxiliary on the outside. However, it does not lead to contamination of the display device or other parts or cause of failure.

According to a fourth aspect of the present invention, the tablet input device has a size larger than the electrode as the sealing auxiliary body, and the sealing material extends over the inner surface of the overhanging peripheral portion of the sealing auxiliary body and the entire peripheral end surface of the device body. Is attached. Due to the presence of the overhanging peripheral portion, the amount of the sealing material attached can be greatly increased, so that the hermetic sealing property is further improved. When such a large-sized sealing auxiliary body is attached to both the upper movable electrode and the lower fixed electrode, a rectangular annular recess is formed between the overhanging peripheral portions of both the sealing auxiliary bodies and the peripheral end surface of the device body. However, since the sealing material can be filled in the rectangular annular concave portion, the filling amount becomes extremely large, and the hermetic sealing property becomes extremely high.

According to a fifth aspect of the present invention, while the upper movable electrode has a size larger than the lower fixed electrode, a sealing auxiliary body having a size larger than the lower fixed electrode is attached to an outer surface of the lower fixed electrode. A sealing material is attached to the overhanging peripheral portion of the upper movable electrode, the overhanging peripheral portion of the sealing auxiliary body, and the entire peripheral end surface of the apparatus body. As in the case of the fourth aspect, the filling of the sealing material into the rectangular annular recess can be realized, and the hermetic sealing property is extremely high.

According to a sixth aspect of the present invention, the tablet input device is either a cabinet installed in the device for exposing the outer surface of the display device or a cabinet installed in the device for holding the device body. Things. The cabinet, which is naturally required for mounting the tablet input device, is used as a sealing aid.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid-filled / resistive-film type tablet input device according to the present invention will be described below in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a sectional view showing a schematic structure of a tablet input device according to a first embodiment. A transparent reinforcing film 7 as a sealing auxiliary body of the same shape and the same size is adhered to the outer surface of the upper movable electrode 1 made of a transparent film having a resistive film (not shown) formed on the inner surface via a transparent adhesive. Have been. Similarly, a lower fixed electrode 2 made of transparent glass having a resistive film (not shown) formed on the inner surface.
A transparent reinforcing film 8 as a sealing auxiliary body having the same shape and the same size is adhered to the outer surface of the device through a transparent adhesive.

An upper movable electrode 1 and a lower fixed electrode 2 are opposed to each other at a predetermined interval, and are fixed and held in a state where the distance between the two electrodes 1 and 2 is regulated by interposing a distance piece 4 on the entire circumference. I have.

As the resistance film in each of the upper movable electrode 1 and the lower fixed electrode 2, for example, an ITO (indium tin oxide) film or a carbon film is used. Upper movable electrode 1
PET (polyethylene terephthalate) is used as a film constituting. The upper and lower transparent reinforcing films 7 and 8 are made of the same material having the same refractive index as the electrodes 1 and 2.

A colorless and transparent liquid 5 having a refractive index substantially equal to that of the electrodes 1 and 2 is injected into a space surrounded by the electrodes 1 and 2 and the distance piece 4 from a small hole formed in the distance piece 4. Is filled. As shown in FIG. 2, all peripheral end surfaces of the transparent reinforcing film 7, the upper movable electrode 1, the distance piece 4, the lower fixed electrode 2, and the transparent reinforcing film 8 are formed using a dispenser 9 containing the sealing material 6. A sealing material 6 having a sufficiently large thickness is applied and adhered to the whole, and is cured, whereby the whole is integrated and the filled liquid 5 is hermetically sealed. An epoxy resin adhesive or an acrylic resin adhesive is used as the sealing material 6, and is cured by heating in an oven or the like after application. When an ultraviolet-curable resin adhesive is used as the sealing material 6, it can be hardened in a short time by ultraviolet irradiation after application.

The refractive index of the sealed liquid 5 is set to the two electrodes 1 and 2.
Since the added transparent reinforcing films 7 and 8 have substantially the same refractive index as the electrodes 1 and 2, the reflection of light at the interface between the layers is prevented, the transmittance is increased, and the visibility is improved. .

The upper movable electrode 1 is a film, the lower fixed electrode 2 is glass, the electrodes 1 and 2 are made of different materials, and although the upper movable electrode 1 is thin, And that a sufficient amount of the sealing material 6 is adhered over the entire peripheral end surface of the distance piece 4 and also over the entire peripheral end surfaces of the transparent reinforcing films 7 and 8 on the respective outer sides. , 8 are of the same material, so the reliability of hermetically sealed is sufficiently high.
Prevents liquid leakage reliably.

The dispenser 9 is used to seal the sealing material 6.
The application of suffices to make the application amount sufficient and to easily apply a uniform thickness over the entire circumference. Even when the upper movable electrode 1 is a thin film, the transparent reinforcing film 7 is integrated on the outside, so that wrinkling is reliably prevented. Should the upper movable electrode 1 be damaged due to excessive load or abnormal impact, etc.
Even if the lower fixed electrode 2 is broken, since the transparent reinforcing films 7 and 8 exist outside, the liquid leakage does not reach the outside, and the display device and other parts are contaminated or cause a failure. It doesn't even happen. In order to avoid liquid leakage, it is not necessary to keep the peripheral portion away from the input area, and unnecessary increase in the overall size is suppressed.

[Second Embodiment] FIG. 3 is a sectional view showing a schematic structure of a tablet input device according to a second embodiment. Reference numerals are the same as those in FIG. 1, 1 is an upper movable electrode made of a transparent film, 2 is a lower fixed electrode made of transparent glass, 4 is a distance piece, and 5 is a liquid. In the second embodiment, the transparent reinforcing film 7 has a larger area on the outer surface of the upper movable electrode 1 than the upper movable electrode 1, and the entire periphery extends outward in the surface direction from the peripheral portion of the upper movable electrode 1. Are attached via a transparent adhesive. Similarly, the outer surface of the lower fixed electrode 2 has a larger area than that of the lower fixed electrode 2, and the transparent reinforcing film 8 is coated with the transparent adhesive in a state where the entire periphery protrudes outward in the plane direction from the peripheral portion of the lower fixed electrode 2. Has been pasted through. Both transparent reinforcing films 7,
8, a rectangular annular recess a formed between the inner surfaces of the opposing projecting peripheral portions 7a, 8a and the entire peripheral end surfaces of the upper movable electrode 1, the lower fixed electrode 2, and the distance piece 4.
The sealing material 6 is applied and cured, and the whole is integrated.
Other configurations are the same as those of the first embodiment (FIG. 1), and the method of applying the sealing material 6 is the same as that of the first embodiment.

The rectangular annular recess a is quite deep,
Since the sealing material 6 is applied to the rectangular annular recess a, the amount of the sealing material 6 attached can be made sufficient. Sealing material 6
Are commonly bonded to the entire peripheral end surfaces of the upper movable electrode 1, the lower fixed electrode 2, and the distance piece 4 and to the three flat portions of the overhanging peripheral portion 7a and the overhanging peripheral portion 8a, so that the adhesive strength is sufficient. Thus, a highly reliable hermetic sealing property can be ensured. The other effects are the same as those in the first embodiment, and thus the description is omitted.

[Third Embodiment] FIG. 4 is a sectional view showing a schematic structure of a tablet input device according to a third embodiment. Reference numerals are the same as those in FIG. 1, 1 is an upper movable electrode made of a transparent film, 2 is a lower fixed electrode made of transparent glass, 4 is a distance piece, and 5 is a liquid. In the third embodiment, the upper movable electrode 1 has a larger area than the lower fixed electrode 2, and the entire periphery of the upper movable electrode 1 extends beyond the periphery of the lower fixed electrode 2 in the plane direction. It is fixed and held via the piece 4. The outer surface of the lower fixed electrode 2 has an area larger than that of the lower fixed electrode 2, and the transparent reinforcing film 8 is provided via a transparent adhesive with the entire periphery projecting outward in the surface direction from the peripheral portion of the lower fixed electrode 2. It is pasted. No transparent reinforcing film is attached to the outer surface of the upper movable electrode 1. The upper movable electrode 1 having a large area and the transparent reinforcing film 8 have the same size and shape, and are opposed to each other at the same position.

The upper movable electrode 1 and the transparent reinforcing film 8 are fixed and held via the distance piece 10 in contact with the lower fixed electrode 2 and the entire peripheral end surface of the distance piece 4. The sealing material 6 is applied to a rectangular annular recess b formed between the inner surfaces of the opposed peripheral portions 1a and 8a of the upper movable electrode 1 and the transparent reinforcing film 8 and the entire peripheral end surface of the distance piece 10. It is hardened and integrated as a whole. Other configurations are the same as those of the first embodiment (FIG. 1), and the method of applying the sealing material 6 is the same as that of the first embodiment.

As in the case of the second embodiment, since the sealing material 6 is applied to the rectangular annular recess b having a considerable depth, the amount of the sealing material 6 attached can be made sufficient. it can. Since the sealing material 6 is bonded to the entire peripheral end surface of the distance piece 10 and to the three flat portions of the overhanging peripheral portion 1a and the overhanging peripheral portion 8a, the bonding strength is sufficient and the reliability is very high. High hermetic sealing performance can be ensured. The other effects are the same as those in the first embodiment, and thus the description is omitted.

[Embodiment 4] The tablet input device according to Embodiment 4 is the same as that of Embodiment 1 (FIG. 1), Embodiment 2 (FIG. 3) or Embodiment 3 (FIG. 4).
The transparent reinforcing films 7 and 8 are made of a transparent film such as PET (polyethylene terephthalate). Since the transparent film is used, the visibility is good, and even in the event of destruction of the upper movable electrode 1 and the lower fixed electrode 2, the liquid leakage does not reach the outside because the liquid crystal is wrapped in the transparent film. And other parts are not contaminated or cause failure.

[Fifth Embodiment] The tablet input device according to the fifth embodiment is different from the tablet input device according to the first embodiment (FIG. 1), the second embodiment (FIG. 3) or the third embodiment (FIG. 4).
Particularly, an icon sheet is integrated with the outer surface (lower surface) of the lower fixed electrode 2 as a transparent reinforcing film 8. The icon sheet is, for example, PET (polyethylene terephthalate)
An icon indicating the fixed input unit is printed on a transparent sheet such as a sheet. The icon sheet is also used as a reinforcing film. Also in this case, highly reliable hermetic sealing can be ensured. The other effects are the same as those in the first embodiment, and thus the description is omitted.

[Sixth Embodiment] A tablet input device according to the sixth embodiment is different from the tablet input device according to the first embodiment (FIG. 1), the second embodiment (FIG. 3) or the third embodiment (FIG. 4).
The transparent reinforcing films 7 and 8 are particularly made of an anti-reflection film (AR film). The anti-reflection film is, for example, a transparent film such as PET (polyethylene terephthalate) or TAC (triacetyl cellulose) on which a metal thin film is formed in a single layer or a multilayer by a method such as vapor deposition. improves. Also in this case, highly reliable hermetic sealing can be ensured. The other effects are the same as those in the first embodiment, and thus the description is omitted.

[Seventh Embodiment] A tablet input device according to the seventh embodiment is different from the tablet input device according to the first embodiment (FIG. 1), the second embodiment (FIG. 3) or the third embodiment (FIG. 4).
One of the transparent reinforcing films 7 and 8 is used as a polarizing plate particularly used for a liquid crystal display device. The polarizing plate is also used as a transparent reinforcing film. Also in this case, highly reliable hermetic sealing can be ensured. The other effects are the same as those in the first embodiment, and thus the description is omitted.

[Embodiment 8] The tablet input device according to Embodiment 8 is the same as that of Embodiment 1 (FIG. 1), Embodiment 2 (FIG. 3) or Embodiment 3 (FIG. 4).
One of the transparent reinforcing films 7 and 8 is used as a retardation plate used particularly in a liquid crystal display device. The retardation plate is also used as a transparent reinforcing film. Also in this case, highly reliable hermetic sealing can be ensured. The other effects are the same as those in the first embodiment, and thus the description is omitted.

Ninth Embodiment A ninth embodiment utilizes a cabinet installed on the upper part of the apparatus. FIG.
15 is a sectional view showing a schematic structure of a tablet input device according to Embodiment 9. FIG. An upper movable electrode 1 made of, for example, a transparent film of PET having a resistive film of ITO (not shown) formed on the inner surface thereof, and a lower electrode made of transparent glass having a resistive film (not shown) formed on the inner surface thereof. The fixed electrodes 2 are opposed to each other with a predetermined space therebetween, and the distance pieces 4 are interposed on the entire circumference to fix and hold the electrodes 1 and 2 in a state where the distance is regulated.

A colorless and transparent liquid 5 having a refractive index substantially equal to that of the electrodes 1 and 2 is injected into a space surrounded by the electrodes 1 and 2 and the distance piece 4 from a small hole formed in the distance piece 4. Is filled. An opening 11a for viewing a screen of a display device such as a CRT or an LCD is formed in the cabinet 11 installed on the upper part of the apparatus. Cabinet 11 with opening 11a closed
The upper movable electrode 1 of the main body of the liquid-filled / resistive film type tablet input device having the above-mentioned configuration is brought into contact with the back surface of the device, and a sealing material 6 is applied between the main body and the cabinet 11 over the entire periphery of the contacting portion. The main body is attached to the cabinet 11 with the adhesive property of the sealing material 6.

The sealing material 6 extends from the entire periphery of the lower surface of the lower fixed electrode 2 to the entire peripheral end surfaces of the lower fixed electrode 2, the distance piece 4 and the upper movable electrode 1, and over a sufficient area of the back surface of the cabinet 11. I have. The sealing material 6 has a sufficiently large and uniform thickness over the entire circumference using a dispenser 9 in the same manner as in FIG. It is enclosed. An epoxy resin adhesive or an acrylic resin adhesive is used as the sealing material 6, and is cured by heating in an oven or the like after application. When an ultraviolet-curable resin adhesive is used as the sealing material 6,
It can be hardened in a short time by ultraviolet irradiation after application.

Since a sufficient amount of the sealing material 6 is adhered, the reliability of hermetic sealing is sufficiently high, and liquid leakage is reliably prevented.

[Embodiment 10] Embodiment 10 utilizes a cabinet provided in a device for holding the main body of a tablet input device. FIG. 6 is a sectional view showing a schematic structure of the tablet input device according to the tenth embodiment. The main body of the liquid-filled / resistive-film type tablet input device configured in the same manner as in the ninth embodiment (FIG. 5) is fixed to a cabinet 12 for mounting the main body.

An opening 12a for viewing the screen of a display device such as a CRT or an LCD is formed in the cabinet 12, and a corner having a size slightly larger than the main body of the tablet input device is formed on the upper surface facing the opening 12a. An annular step 12b is formed. The main body of the tablet input device is placed on the square annular step 12b in a state of closing the opening 12a, and the sealing material 6 is applied between the main body and the square annular step 12b over the entire periphery of the main body. The main body is attached to the cabinet 12 with the adhesive property of the stopper 6.

The sealing material 6 extends from the entire periphery of the upper surface of the upper movable electrode 1 to the entire peripheral end surfaces of the upper movable electrode 1, the distance piece 4 and the lower fixed electrode 2, and over substantially the entire rectangular annular step 12 b. I have. The application of the sealing material 6 is performed in the same manner as described above. However, since the application can be performed along the rectangular annular step portion 12b, the work is easy and a sufficient amount of application is possible. Reference numeral 13 denotes a lid cabinet for clamping and fixing.

Also in this case, since a sufficient amount of the sealing material 6 is adhered, the reliability of hermetically sealed is sufficiently high, and liquid leakage is reliably prevented.

Although several embodiments have been described above, the present invention includes the following configurations.

(1) In the above embodiment, the analog resistive tablet input device in which a resistive film is formed on the inner surfaces of the upper movable electrode and the lower fixed electrode has been described. Even if the present invention is applied to a digital resistance pressure-sensitive tablet input device in which a plurality of linear resistors for coordinate detection are formed and a plurality of linear resistors for Y-direction coordinate detection are formed on the lower fixed electrode. Good. If possible, application to a capacitance type or electromagnetic induction type tablet input device is also conceivable.

(2) Any one or more of the configurations of Embodiments 4 to 8 may be applied to any of Embodiments 1 to 3, or any of Embodiments 4 to 8 may be applied. The components may be combined with each other, or any of the first to eighth embodiments may be applied to the ninth or tenth embodiment.

[0042]

According to the present invention regarding the tablet input device, the amount of the sealing material attached can be sufficiently increased by greatly enlarging the adhesion area of the sealing material by using the sealing auxiliary body, and the tablet can be hermetically sealed. In addition to improving the performance, it is not necessary to keep the peripheral part away from the input area in order to avoid liquid leakage, and it is possible to avoid an increase in size. Of course, high visibility is ensured. Even if the upper movable electrode or the lower fixed electrode is destroyed for some reason, the outer film-like sealing auxiliary prevents liquid leakage to the outside, contaminating the display device and other parts, and causing failure. Can be avoided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic structure of a tablet input device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a state where a sealing material is applied using a dispenser in the case of Embodiment 1.

FIG. 3 is a sectional view showing a schematic structure of a tablet input device according to a second embodiment;

FIG. 4 is a sectional view showing a schematic structure of a tablet input device according to a third embodiment;

FIG. 5 is a sectional view showing a schematic structure of a tablet input device according to a ninth embodiment;

FIG. 6 is a sectional view showing a schematic structure of a tablet input device according to a tenth embodiment;

FIG. 7 is a cross-sectional view illustrating a schematic structure of a resistive tablet input device according to the related art.

FIG. 8 is a sectional view showing a schematic structure of a liquid-filled / resistive-film type tablet input device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper movable electrode 1a ... Overhanging peripheral part 2 ... Lower fixed electrode 4 ... Distance piece 5 ... Liquid 6 ... Sealing material 7 ... Transparent reinforcing film (sealing auxiliary body) 7a ... Overhanging peripheral part 8 ... Transparent reinforcing film (sealing auxiliary body) 8a ... overhang peripheral part 9 ... dispenser 10 ... distance piece 11 ... cabinet (sealing auxiliary body) 12 ... cabinet (sealing auxiliary body) 12b ... square ring Step 13: lid cabinet a: square annular recess b: square annular recess

Claims (6)

[Claims] 1. A tablet input device in which liquid is sealed between an upper movable electrode and a lower fixed electrode opposed to each other, wherein at least one of the electrodes is brought into contact with a sealing auxiliary body, and the device body and the device main body are connected to each other. A tablet input device, wherein a sealing material is adhered to a sealing auxiliary body. 2. The tablet according to claim 1, wherein the sealing auxiliary body is any one of a transparent film, an icon sheet, an anti-reflection film, a polarizing plate and a retardation plate, and is attached to an outer surface of the electrode. Input device. 3. The sealing auxiliary body is attached to both the outer surface of the upper movable electrode and the outer surface of the lower fixed electrode.
Or the tablet input device according to claim 2. 4. The sealing auxiliary body is larger in size than the electrode, and a sealing material is adhered to the inner surface of the overhanging peripheral portion and the entire peripheral end surface of the apparatus main body. The tablet input device according to any one of the above. 5. An upper movable electrode having a size larger than that of the lower fixed electrode, and a sealing auxiliary body having a size larger than that of the lower fixed electrode is attached to an outer surface of the lower fixed electrode. The tablet input device according to any one of claims 1 to 3, wherein a sealing material is adhered over the overhanging peripheral portion of the sealing auxiliary body and the entire peripheral end surface of the device main body. 6. The device according to claim 1, wherein the sealing auxiliary body is one of a cabinet installed in the device for exposing the outer surface of the display device and a cabinet installed in the device for holding the device main body. Tablet input device.