JPS589467B2 - I'm not sure what to do. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that simultaneously performs a writing operation and converts the writing stroke into an electrical signal to input information such as characters.

This type of input device is shown in FIG.

1 is a pen. The outer casing, 2a, 2b, 2c, and 2d are pressure-sensitive elements provided on the inner wall of the pen, and 3 is a lead shaft supported by a holding part 4 at the tip of the outer casing 1, which is similar to the lead shaft of a mechanical pencil or ballpoint pen. It has a structure like this.

When writing on paper using this device, the tip of the core shaft 3 receives a reaction due to friction with the paper, and applies stroke pressure to the pressure sensitive elements 2a, 2b, 2c, 2d using the holding part 4 of the outer casing 1 as a fulcrum. Communicate.

For example, when writing in the direction e as shown in the plan view of FIG. 1A, pressure is applied to the pressure-sensitive element 2d, and when writing in the direction f, pressure is applied to the pressure-sensitive element 2a.

When a pen (input device) is held with the pressure sensitive element 2c on top and the pen 2d in front, and numbers are written in the manner shown in FIG. 2, each pressure sensitive element receives pressure in the order shown.

For example, in the case of the number "2", the pressure sensitive element 2a receives pressure first, then 2d, then 2b and 2a in this order.

When numbers are written down in this way, the arrangement of pressure-sensitive elements that receive pressure will be different for each number.

Note that point S in FIG. 2 is the starting point for writing.

Note that FIG. 2 is an example, and recognition is actually made by examining the arrangement of components in eight directions using four pressure-sensitive elements.

However, in such a device, the tip of the core shaft 3 is used as a fulcrum,
When pressure is applied to the pen in a certain direction, the other end of the lead shaft 3 moves,
The pressure sensitive element generates an electrical quantity.

In this case, the tip of the core shaft 3 is not moving.

In other words, even though no characters are written, an amount of electricity appears on the pressure-sensitive element.

This often happens unintentionally at the beginning or end of a letter.

It also occurs at the inflection point of the character (portion k in Figure 3).

In these cases, the amount of electricity of the pressure sensitive element is unnecessary, and in the past, this information was input without being identified, which could lead to erroneous recognition.

The present invention aims to eliminate such drawbacks, and examples thereof will be described below.

Components designated by 1, 2a, 2b, 2c, 2d, 3, and 4 in FIG. 4 correspond to those with the same symbols in FIG.

The difference is that a ball 6 is provided at the tip of a core shaft 3 containing ink 5, and this ball is magnetized into four poles as shown in FIG.

Moreover, magnetic detection elements 7x, 7y, and 7z, such as Hall elements, are cut at the tip of the outer casing 1, respectively, and are oriented in the x, y, and z directions.

When writing on paper using this pen, the pressure-sensitive element generates electric force due to the same effect as described in conjunction with Figures 1 to 3, but on the other hand, the amount of electricity from 7x, 7y, and 7z also causes the ball 6 to rotate. It changes depending on what you do.

However, since the ball 6 is magnetized as shown in FIG. 5, no matter what direction it rotates, the amount of electricity in either of the i-sensing elements 7y, 7z changes.

When the electric quantities of the magnetic detection elements 6x, 6y, and 6z do not change, the ball 6 is not rotating.

Therefore, the ball 6 does not rotate at the beginning or end of writing or at the inflection point of the character.

If the information from the pressure sensing elements is outputted only when the amount of electricity of the magnetic sensing elements 7x, 7y, 7z is changing in this way, the above-mentioned problems can be solved.

Note that in order to detect changes in the amount of electricity of the magnetic detection elements 7x, γy, 7z, those elements γx, 7y, 7z
When at least one of the absolute values of the outputs of the differential outputs of the electrical quantities is larger than α, information on the pressure sensitive element is output.

Here, α is a value that takes into account noise, writing speed, etc.

Further, when the differential values of the outputs of the three elements 7x, 7y, and 7z are all smaller than α, the output of the information of the pressure sensitive element is stopped.

As is clear from the above embodiments, according to the present invention, it is possible to obtain information that removes a signal that is weak due to the pressure applied to the lead shaft when no writing operation is being performed, thereby providing accurate information. can be input.

In addition, the pen barrel has an ink supply section, and by drawing the information to be input on the paper, the person inputting the information can confirm the information to be input, which has a unique effect. .

[Brief explanation of the drawing]

Figure 1A and mouth are top views of conventional information input devices, respectively;
2 is a diagram showing the relationship between written characters and writing pressure, FIG. 3 is a diagram showing the writing state, and FIG. 4 is a top view of an information input device according to an embodiment of the present invention. , front cross-sectional view,
FIG. 5 is a diagram showing the state of magnetization of the sphere. 1...outer casing, 2a, 2b, 2c, 2d...
...Pressure sensitive element, 3... Core axis, 6... Ball, 7x, 7y, 721... Magnetic detection element.

Claims (1)

[Claims] 1. A pen shaft that has a magnetized ball at its tip and draws characters, figures, etc. on paper using ink supplied from an ink supply section provided inside through the ball, and a pen shaft that draws characters, figures, etc. a pressure-sensitive element that is provided between the housing and the housing and detects pressure according to the direction of writing; and a movement state detection means that detects the rotation of the ball of the pen shaft to detect the movement state of the pen shaft. An information input device equipped with.