JPH0215148Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a tablet unit, and in particular, a pair of horizontal electrodes are printed (deposited) horizontally on an insulating sheet, and the pair of horizontal electrodes are A first resistor unit is formed by depositing a rectangular resistor pattern between electrodes, a pair of vertical electrodes are deposited vertically on an insulating sheet, and a rectangular resistor pattern is provided between the pair of vertical electrodes. a second resistor unit having a resistor pattern deposited thereon; a dot spacer is deposited on the resistor pattern of at least one of the first resistor unit and the second resistor unit; , relates to a tablet unit formed by overlapping second resistor units.

<Prior art> A first resistor unit is formed by printing (adhering) a pair of horizontal electrodes and a resistor pattern on a first insulating sheet, and a pair of vertical electrodes is formed on a second insulating sheet. It has a second resistor unit formed by depositing a resistor pattern, dot spacers are deposited on at least one of the resistor patterns at appropriate intervals, and these first and second resistor units are connected. By overlapping, a predetermined resistor pattern portion of the upper resistor unit and a resistor pattern portion of the lower resistor unit are brought into contact by pressing, and the resistance value or voltage value between the vertical electrode and the horizontal electrode at the time of contact is determined. There is a tablet unit that detects the contact position and inputs the two-dimensional position of the contact position.

FIGS. 1 and 2 are explanatory diagrams of such a conventional tablet unit. In FIG. 1, a pair of horizontal electrodes 11a and 11b made of silver material are printed (adhered) on a transparent first insulating sheet 11 as indicated by diagonal lines using a printing technique. ，
A rectangular resistor pattern 11c made of carbon material is similarly applied between the resistors 11b and 11b using a printing technique to form a first resistor unit FRU. and,
Each horizontal electrode 11a, 11b has an electrode outlet 11
guided by d. Note that the first insulating sheet 11
On the top is a conductive part 11 that conducts to a vertical electrode, which will be described later.
e and 11f are also printed.

On the second transparent insulating sheet 12, as shown by diagonal lines, a pair of vertical electrodes 12a, 12 made of silver material are provided.
b is printed by a printing technique, a rectangular resistor pattern 12c made of carbon is printed between the pair of vertical electrodes by a printing technique, and the entire surface of the resistor pattern 12c is printed uniformly by a printing technique as well. The dot spacers 12d, 12d, . . . are printed with a uniform density to form the second resistor unit SRU. A portion of the left end of the second insulating sheet 12 is cut out so as not to overlap with the cable unit 13 shown in FIG. 2 which is attached to the electrode outlet 11d.

Note that the first insulating sheet 11 and the second insulating sheet 12 are not completely separated, and the bridge portions 14, 14
They are united through this. Then, the first resistor unit FRU and the second resistor unit SRU are overlapped by bending along the dashed line in the figure. Moreover, the resistor patterns 11c and 12c printed on the respective insulating sheets 11 and 12 have the same shape, and when folded from the dashed line in the figure and overlapped, the dot spacers 12d and 12d
It is now possible to counter correctly at appropriate intervals. Furthermore, a second insulating sheet 12
The upper pair of vertical electrodes 12a, 12b are connected to the bridge portion 14,
14 and the electrode outlet 1 through the conductive parts 11e and 11f which are also printed on the first insulating sheet.
It is guided by 1d.

Therefore, as shown in FIG. 2, the end portion 13f of the cable unit 13 has four conductive portions 13b to 13e formed on a transparent strip-shaped insulating sheet 13a.
, each of the conductive parts 13b to 13e connects to the electrode outlet 1.
Horizontal electrodes 11a and 11b led out to 1d
and the vertical electrodes 12a and 12b, and then fold the second resistor unit SRU over the first resistor unit FRU according to the dashed line in FIG. Taplet units separated from each other by the thickness are completed.

<Disadvantages of the Prior Art> Incidentally, in the conventional tablet unit, dot spacers are formed with uniform density on the resistor pattern 12c by printing. That is, the density of the dot spacers in the peripheral part of the resistor pattern and in the parts other than the peripheral part were approximately the same. In the tablet unit, the two-dimensional position of the pressing point is input by pressing a predetermined part of one resistor pattern and bringing that part into contact with the other resistor pattern, so the density of the dot spacer The contactability decreases as the concentration increases. For this reason, the density of the dot spacer cannot be increased. Moreover, each resistor pattern 11c, 12
The peripheral part of c is printed on the horizontal and vertical electrodes, so the peripheral part is slightly raised from the other parts. For this reason, in the conventional tablet unit, the peripheral portion or electrode of one resistor pattern may come into contact with the peripheral portion or electrode of the other resistor pattern, resulting in malfunction.

<Purpose of the invention> The purpose of the invention is to provide a tablet unit that can reliably prevent the periphery of one resistor pattern or electrode from coming into contact with the periphery of the other resistor pattern or electrode without pressing. It is to provide.

<Summary of the invention> In the tablet unit of the invention, the density of the dot spacers in the periphery of the resistor pattern where the dot spacers are formed is made higher than the density of the dot spacers in the part other than the periphery. This prevents the peripheral part of the resistor pattern from coming into contact with the peripheral part of the other resistor pattern or the electrode, and maintains good contact during pressing in parts other than the peripheral part.

<Embodiment> FIG. 3 is an explanatory diagram of a tablet unit according to the present invention, and the same parts as in the conventional example shown in FIG. 1 are given the same reference numerals. The difference from the conventional example shown in FIG. 1 is the density of the dot spacers 12d printed on the resistor pattern 12c. That is, in the tablet unit of the present invention, the density of the dot spacers in the peripheral area of the resistor pattern 12c is made higher than the density of the dot spacers in the area other than the peripheral area. Referring to FIG. 2, the spacing _s1 between the dot spacers 12d, 12d at the periphery is 1/2 of the spacing _s1 in the conventional tablet unit. The density of the dot spacers in areas other than the peripheral area is the same as that of the conventional tablet unit. As a result, the dot spacer spacing s ₁ in the peripheral area becomes approximately 1/2 of the spacing s ₂ between the dot spacers 12d, 12d in the upward-rightward linear direction or leftward upward linear direction in areas other than the peripheral area, and The density of the spacer is increasing.
Note that in two-dimensional position input, since an operating pen or the like is often moved in the horizontal and vertical directions, the dot spacers are printed so that the intervals between the dot spacers in the horizontal and vertical directions are long.

<Effects of the invention> As explained above, according to the invention, the density of the dot spacers in the periphery of the resistor pattern is made higher than the density of the dot spacers in the area other than the periphery, so that the periphery of the resistor pattern is connected to the other resistor. It is possible to provide a tablet unit that does not come into contact with patterns or electrodes and does not malfunction.

In addition, since the density of the dot spacers in areas other than the periphery of the resistor pattern is the same as in the prior art, good contact during pressing can be maintained.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of a conventional tablet unit, and FIG. 3 is an explanatory diagram of a tablet unit according to the present invention. FRU...First resistor unit, 11...Insulating sheet, 11a, 11b...Horizontal electrode, 11c
...Resistor pattern, SRU...Second resistor unit, 12...Second insulating sheet, 12a, 1
2b... Vertical electrode, 12c... Resistor pattern,
12d...Dot spacer, 13...Cable unit.

Claims (1)

[Scope of utility model registration request] A first resistor unit includes a pair of horizontal electrodes placed horizontally on an insulating sheet and a rectangular resistor pattern placed between the pair of horizontal electrodes; A second resistor unit has a pair of vertical electrodes attached in the direction of the resistor, and a rectangular resistor pattern is attached between the pair of vertical electrodes. A dot spacer is attached on at least one resistor pattern of a two-resistor unit, and the resistor pattern on which the dot spacer is attached in a tablet unit formed by overlapping the first and second resistor units. A tablet unit characterized in that the density of the dot spacers in the peripheral portion is higher than the density of the dot spacers in a portion other than the peripheral portion.