JPS6347816A - Input pen for coordinate detector - Google Patents

Abstract

PURPOSE:To contrive to improve the operability and to prolong the life of an input pen by using a pen supported by a support member so that the pen can swing and an amplifier which is filled with liquid. CONSTITUTION:The tip of the pen 3 of the input pen is brought into slanting contact with the detection surface 12 of a tablet and then the pen 3 swings to draw the lower end surface 56 of the amplifier 5 downward. Consequently, a bellows part 51 expands to increase the capacity of a large-diameter cylinder 53, and the liquid in the amplifier 5 moves to the cylinder 53 to make a bellows part 54 on the side of a small-diameter cylinder 53, so that the movement quantity of an output surface 57 is increased as compared with the movement quantity of an input surface 56. A magnet 8 fixed to the output surface 57 of the amplifier 5, therefore, moves toward the pen 3 and electromotive force generated by the variation of magnetic flux penetrating a coil 10 is applied as a command signal (timing signal for coordinate detection) to a coordinate detecting device. When the input pen is made to leave the tablet detection surface 12, the support member 2 restores itself by its elasticity and to restore the bellows part 54 and shrink the bellows part 51.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an input pen used as an input device for a coordinate detection device.

[Prior art]

Conventionally, a free cursor method and an input pen method have been used as input devices for coordinate detection devices.

The former free cursor method is used to detect patterns depending on the type of pattern at a fixed point. Align the cross mark of the free cursor with the measurement point and press one of the plurality of keys provided on the free cursor.

On the other hand, the latter input pen method is used when simply detecting a coordinate position. Move the input pen to the measurement point and press down on the input pen to push the pen tip into the pen body and turn on the contact of the switch built into the input pen.
Detect the coordinates of the m++ fixed point on the tablet detection surface. Note that the switch used mechanical contacts.

[Problem that the invention seeks to solve]

In the input pen method, in order to close the switch built into the input pen when detecting coordinates, the pen tip of the input pen is brought into contact with the tablet detection surface, and then the input pen is held perpendicular to the tablet detection surface and a predetermined amount is pressed. It has to be pushed down, making it difficult to operate.

Additionally, if the input vent is used frequently, the contacts of the switch built into the input vent will wear out, resulting in a short lifespan.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an input vent for a coordinate detection device that is easy to operate and has a long life.

[Means for solving problems]

The structure of the present invention for solving the above object will be explained using FIG. 1, FIG. 2, and FIG. 3 corresponding to the embodiment. In Figure 1, 1 is Benkabar. Reference numeral 2 denotes a diaphragm-shaped support member, which is fixed to one end of the pen cover 1. 3
is a pen whose one end protrudes from one end of the pen cover 1, and is swingably supported by the support member 2. 5
are amplifiers each having a bellows part, a pair of cylindrical shapes with different diameters, integrally formed so that the insides communicate with each other, and the insides being filled with liquid, and the pen cover is placed so that the large diameter side faces the pen 3. It is fixed at 1. 7 is a wire connected to each opposing portion of the pen 3 and the amplifier 5; 8 is a magnet fixed to the small diameter side of the amplifier 5; A coil 9 is fixed to the pen cover 1 so that the magnet 8 is fitted therein so as to be movable in the axial direction.

[For production]

When the tip of the pen 3 of the input pen configured as described above is brought into contact with the tablet detection surface 12 obliquely at a desired coordinate of the tablet detection surface 12, the pen 3 can be swung on the support member 2. 2, the pen 3 swings as shown in FIGS. 2a and 2s. Due to the swinging, the wire 7 pulls the lower end surface of the amplifier 5 downward.

Here, the amplifier 5 is transformed as shown in FIG. That is, the radius of the lower end surface of the amplifier 5 is R9, the radius of the upper end surface is R, and the wire 7 is
The amount of movement of the output surface of the amplifier 5 when the amplifier 5 is pulled is expressed by the following equation.

γ2π h = R2πH・・・・・・・・・・・・
... (1) Therefore, h / H = R2 / γ2 ......
(2) From the above equation (2), the amount of movement of the upper end surface is amplified by R2/γ2 times the amount of movement H of the lower end surface.

Since the magnet 8 is fixed to the upper end surface of the amplifier 5, the amount of movement H of the lower end surface of the amplifier 5 is 12/γ2.
Move in the axial direction by twice as much. At this time, in the coil 9 fitted with the magnet 8, the magnetic flux passing through the coil 9 changes due to the movement of the magnet 8, so an electromotive force is generated according to the law of electromagnetic induction. The electromotive force is applied to the coordinate detection device as a command signal (timing signal for detecting coordinates).

As described above, without the vertical stroke of pen 3, the pen 3
can come into contact with the tablet detection surface 12.

Moreover, since the input bevel is pressed down against the tablet detection surface 12 like a writing instrument, the operability of the input ben is improved.

Furthermore, since the input vent is non-contact, it can be constructed with a long life.

〔Example〕

1 to 4 show an embodiment of an input pen of a coordinate input device of the present invention.

In Figure 1, C, , l are pen covers. Reference numeral 2 denotes a diaphragm-shaped support member fixed to the lower end of the pen cover 1. 3
so that one end protrudes from the lower end of the pen cover 1,
A pen swingably supported by the support member 2. 4 is a coupling member for fixing the pen 3 to the support member 2; 5 is an amplifier supported by an annular block 6 fixed within the pen cover 1; As shown in FIGS. 3 and 4, this amplifier 5 has a bellows part 51 on the lower side, a large diameter cylinder 53 with a fixing part 52 that fits with the block 6 on the upper side, and a bellows part 54 on the side. The large diameter cylinder 53 and the small diameter cylinder 55 are integrally formed so as to communicate internally, and the inside is filled with liquid. A wire 7 connects the upper end of the pen 3 and the center of the lower end surface 56 of the amplifier 5.

Reference numeral 8 denotes a magnet fixed to the upper end surface 57 of the amplifier 5 on the small diameter container 55 side. Reference numeral 9 denotes a bobbin fixed to the side surface of the pen cover 1, which has a hole formed in its axis through which the magnet 8 can move. IO is a sheep-shaped coil on the Bobbi/9. 11
is a spring coupled to the upper end surface of the pen cover 1 and the upper end of the magnet 8;

12 is a tablet detection surface with which the tip of the pen 3 comes into contact.

The tip of the pen 3 of the input pen is brought into contact with the tablet detection surface 12 obliquely. Then, the pen 3 swings as shown in FIG. 2A and pulls the lower end surface 56 of the amplifier 5 downward via the wire 7.

As shown in FIG. 3, the bellows portion 51 extends, the volume of the large-diameter cylinder 53 expands, and the liquid within the amplifier 5 moves toward the cylinder 53. Therefore, the bellows portion 54 on the side of the small diameter cylinder 55 contracts.

As a result, from the above equation (2), the amount of movement of the output surface 57 is amplified by R2/γ2 times the movement iH of the input surface 56.

Therefore, the magnet 8 fixed to the output surface 57 of the amplifier 5 moves toward the pen 3 as shown in FIG. At this time, since the magnetic flux passing through the coil 10 changes due to the movement of the magnet 8, an electromotive force is generated in the coil 10 according to the law of electromagnetic induction.

The electromotive force is applied to the coordinate detection device as a command signal (timing signal for detecting coordinates).

When the input pen is removed from the tablet detection surface 12, the support member 2 is restored by its elasticity, returning the pen 3 to the state shown in FIG. 2a. At this time, since the spring 11 is pulling the magnet 8,
The bellows portion 54 is restored and the bellows portion 51 is contracted.

As detailed above, coordinates can be detected without any vertical strokes of the pen 3, and simply by touching the input pen in an inclined state with respect to the tablet detection surface 12, similar to when writing characters or lines with a writing instrument. Since input operations can be performed on the device, operability is improved. Additionally, the input pen is non-contact and has a long lifespan.

〔Effect of the invention〕

As described above, the present invention improves the operability of the input pen. Furthermore, the life of the input pen can be extended.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the input pen of the present invention, FIG. 2 is an explanatory diagram of the operation of the input pen, FIG. 30 is an explanatory diagram of the operation of the amplifier, and FIG. 4 is a perspective view of the amplifier. 1... Hen cover, 2... Support member, 3.
...Pen, 5...Amplifier, 7...Wire,
8...Magnet, 10...Coil. /+9λ ゛・

Claims (1)

[Claims] 1. In the input pen of the coordinate detection device, the pen cover and
A diaphragm-shaped support member fixed to one end of the pen cover, a pen swingably supported by the support member such that one end protrudes from one end of the pen cover, each having a bellows part and having a diameter. an amplifier consisting of a pair of different cylindrical containers integrally formed so that the insides thereof communicate, the large diameter container being fixed to the pen cover so as to face the pen; and each of the pen and the amplifier. A wire coupled to the opposing part, a magnet fixed to the small diameter container side of the amplifier, and a coil fixed to the pen cover such that the magnet is movably fitted in the axial direction. An input pen for a coordinate detection device characterized by: