JPH09190281A - Pen type coordinate input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct a moving distance with simple constitution since an error owing to an inclination is contained in the moving distance detected by twice integrating acceleration which an acceleration detection sensor detects. SOLUTION: Inclination detection means 3a and 3b having weights held by a pair of coil springs stored in a case with balance are provided by making the moving directions of the weights face two different directions orthogonal with a pen shaft 8. Photosensors for weight position detection 4a and 4b are provided along the inclination detection means 3a and 3b and they detect the positions of the weights. The inclination detection means 3a and 3b calculate the inclination angle and the inclination direction of a pen tip 9 based on the detected positions of the weights. A correction means corrects the moving distance and the moving direction on a writing face based on the inclination angle and the inclination direction of the pen tip 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pen-type coordinate input device for inputting figures, characters, etc. to a computer device or the like.

[0002]

2. Description of the Related Art A keyboard and a mouse are mainly used as an interface between a computer and a human. It may be difficult to input figures with these interfaces,
In order to facilitate the input of figures and the like, pen-type coordinate input devices have been developed as described below.

An example of a pen-type coordinate input device for inputting figures or characters into a computer device is, for example, Japanese Patent Laid-Open No. 6-6.
Built-in acceleration sensor and piezoelectric vibration gyro like the pen type computer input device published in 7799 publication,
There is a method in which the moving direction and the moving amount are detected from the acceleration detected by the acceleration sensor, and the detected moving direction and the moving amount are corrected using the rotation detected by the piezoelectric vibration gyro.

Further, in the pencil type input device disclosed in Japanese Unexamined Patent Publication No. 6-230886, an acceleration sensor is installed above and below the device, and when the enable switch is on, the moving direction of the device is determined based on the output from the acceleration sensor. And the amount of movement is detected.

[0005]

However, in the pen type computer input device disclosed in Japanese Unexamined Patent Publication No. 6-67799, the acceleration detected by the acceleration sensor is integrated twice to detect the distance and the gyro is used. Although the effect of rotation is corrected, the structure is complicated.

In the pencil type input device disclosed in Japanese Patent Laid-Open No. 6-230886, the moving direction and the moving amount of the device are detected based on the output from the acceleration sensor when the enable switch is on. It does not work unless it is instructed by the enable switch.

The present invention has been made to solve the above disadvantages, and an object of the present invention is to improve the detection accuracy of the moving direction and moving distance of a pen-type coordinate input device and improve the operability with a simple structure. To do.

[0008]

In a pen-type coordinate input device according to the present invention, two tilt detecting means, two weight position detecting means, tilt calculating means and correcting means are provided, and each tilt detecting means is in a case. Has weights that are held in equilibrium by a pair of coil springs housed in each of the coil springs. The weights are provided so that the moving directions of the weights are different from each other in two different directions orthogonal to the pen axis. It is represented by the position of the weight where the stretching force and the gravity component are balanced.

Each weight position detecting means is provided along the inclination detecting means, and detects the position of the weight of the corresponding inclination detecting means,
The tilt calculating means calculates the tilt angle and tilt direction of the pen tip portion based on the position of the weight of each tilt detecting means detected by the weight position detecting means, and the correcting means calculates the tilt angle of the pen tip portion calculated by the tilt calculating means. Also, the movement amount and the movement direction on the handwriting are corrected based on the inclination direction to eliminate the detection error of the movement amount due to the inclination of the pen tip.

Further, one inclination detecting means is provided so that the moving direction of the weight is oriented in the axial direction orthogonal to the pen axis, and the other inclination detecting means is provided so that the moving direction of the weight is oriented in the pen axis direction. It is possible to prevent the diameter of the pen-type coordinate input device from increasing.

Further, the spring constant of the coil spring is composed of the inclination detecting means provided so that the moving direction of the weight is in the axial direction orthogonal to the pen axis and the inclination detecting means provided so that the moving direction of the weight is in the pen axis direction. To improve the detection accuracy.

Further, a pen tip contact detection means for detecting the presence or absence of contact between the pen tip portion and the writing surface is provided, and the pen tip contact detection means detects that the pen tip portion and the writing surface are in contact with each other. At this time, the inclination of the pen tip may be detected so that the input timing can be determined without using an enable switch or the like.

Further, the pen-type coordinate input device has a pen tip contact detection means, two movement detection means, and movement calculation means,
The pen tip contact detection means detects whether or not there is contact between the pen tip portion and the writing surface, and the two movement detection means are provided at positions separated by a certain distance in the pen axis direction, and at two positions separated on the pen shaft. The movement calculation means detects the movement amount and the movement direction of the pen-type coordinate input device in a plane orthogonal to the pen axis, and the movement calculation means detects when the pen tip contact detection means detects the contact between the pen tip and the writing surface. The movement direction and the movement amount on the writing surface are obtained from the movement amount and the movement direction of the pen type coordinate input device in the plane orthogonal to the pen axis detected by the two movement detection means, and the pen type coordinate input device of the simple type device configuration is used. Accurately detect the direction and amount of movement.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A pen-type coordinate input device according to the present invention detects a moving direction and a moving amount on a writing surface, and inputs a coordinate and a writing shape based on the detected moving direction and moving amount. In the die coordinate input device, the movement direction and the movement amount detected by obtaining the inclination of the pen coordinate input device with a simple configuration are corrected, and the movement direction and the movement amount of the pen coordinate input device are accurately detected. .

The pen-type coordinate input device includes, for example, movement detection means as means for detecting the movement direction and movement amount on the writing surface, and 2 as means for obtaining the inclination of the pen-type coordinate input device.
One inclination detecting means, two weight position detecting means and an inclination calculating means are provided, and a correcting means is provided as a means for correcting the moving direction and the moving amount detected by the movement detecting means. The movement detection means has, for example, two acceleration sensors, a movement direction detection means, and a movement amount detection means. The two acceleration sensors are provided with their detection directions oriented in two directions orthogonal to each other on a plane orthogonal to the pen axis of the pen-shaped coordinate input device on a cylinder,
Accelerations in two directions orthogonal to the pen axis of the pen-type coordinate input device that moves on the writing surface are detected. The moving direction detecting means detects the moving direction on the writing surface of the pen-type coordinate input device from the magnitudes of the accelerations in the two directions detected by the acceleration sensor. The movement amount detecting means detects the amount of movement on the writing surface of the pen-type coordinate input device by integrating twice the acceleration detected by the acceleration sensor.

The inclination detecting means has, for example, a cylindrical case, a pair of coil springs housed in the cylindrical case, and a weight balanced and held by the pair of coil springs. The two inclination detecting means are respectively provided so that the moving direction of the weight is directed in two directions orthogonal to the pen axis. For example, when the pen-shaped coordinate input device tilts, the weight moves in the cylindrical case according to the tilt of the pen-shaped coordinate input device. Therefore, by detecting the position of each weight, that is, the moving distance from the reference position, the force acting in two directions perpendicular to the pen axis can be detected. Accordingly, the tilt angle of the pen tip portion can be detected, and the tilt direction can be detected from the tilt angles in the two directions. Each weight position detecting means is provided along the inclination detecting means, and detects the position of this weight using, for example, an optical sensor. The inclination calculating means calculates the inclination angle and the inclination direction of the pen tip portion based on the weight positions detected by the weight position detecting means in two directions orthogonal to the pen axis. Since the correction means corrects the movement direction and the movement amount on the writing surface based on the inclination angle and the inclination direction of the pen tip portion calculated by the inclination calculation means, it is possible to reduce the detection error of the movement direction and the movement amount.

Further, the weight of one of the inclination detecting means is provided so as to move in the axial direction orthogonal to the pen axis, and the weight of the other inclination detecting means is provided so as to be in the pen axial direction, and The inclination of the pen tip may be detected by detecting a change in the weight position in the direction orthogonal to the axis and a change in the position of the weight in the pen axis direction. Since one of the inclination detecting means is provided in the pen axis direction, it is possible to prevent the device diameter from increasing, and to reduce the size of the device.

Further, the inclination detection accuracy is higher when the change in the weight position with respect to the pen axis direction is detected more accurately than the change in the weight position with respect to the direction orthogonal to the pen axis. It is also possible to increase the spring constant of the coil spring of the tilt detecting means directed to detect the gravity component in the pen axis direction with higher accuracy than the gravity component in the direction orthogonal to the pen axis.

Furthermore, the pen tip contact detection means detects the presence or absence of contact between the pen tip portion and the writing surface so that the input timing can be determined without using an enable switch or the like, and the pen tip contact detection means detects the contact between the pen tip portion and the writing surface. The inclination of the pen tip may be detected when the contact between the tip and the writing surface is detected. The pen tip contact detection means is composed of, for example, a pressure sensor or the like.

Further, the pen-type coordinate input device may have a pen tip contact detecting means, two movement detecting means and a movement calculating means. The pen tip contact detection means detects whether or not there is contact between the pen tip and the writing surface. The two movement detecting means are provided at positions apart from each other by a certain distance in the pen axis direction, such as a pen tip portion and a pen end portion, and the pen type on a plane orthogonal to the pen axis at the separated positions on the pen axis. The moving amount and moving direction of the coordinate input device are detected. The movement calculation means is a movement amount of the pen-type coordinate input device in a plane orthogonal to the pen axis detected by the two movement detection means while the pen tip contact detection means detects the contact between the pen tip portion and the writing surface. And the moving direction and the moving amount on the writing surface are obtained from the moving direction.
Thus, the input timing can be determined without using the enable switch and the like, and the moving direction and the moving amount of the pen-type coordinate input device can be accurately detected with a simple configuration.

[0021]

1 is a block diagram of a pen-type coordinate input device according to an embodiment of the present invention. As shown in the figure, the pen-type coordinate input device 1 includes an acceleration sensor 2a, 2b, an inclination detecting means 3a,
3b, a weight position detecting means including the weight position detecting photosensors 4a and 4b, a calculation unit 5, a storage unit 6, and a power supply unit 7.

The acceleration sensors 2a and 2b are provided so as to detect accelerations in the x-axis direction and the y-axis direction, for example, when the pen axis 8 is the z-axis, and are pen-directional in the two directions of the x-axis direction and the y-axis direction. The moving direction and acceleration of the front portion 9 are detected. In the following description, the plane orthogonal to the pen axis 8 when the pen axis 8 is the z axis is represented by the x axis and the y axis, and the writing surface when the axis orthogonal to the writing surface 13 is the Z axis is X. Represented by axis and Y axis.

As shown in FIG. 2, the inclination detecting means 3a, 3b includes a cylindrical case 12, a pair of coil springs 11a, 11b housed in the cylindrical case 12, and coil springs 11a, 1b.
It has a weight 10 held in equilibrium by 1b. As shown in FIG. 1, the two inclination detecting means 3a and 3b are provided with a weight 10 in the x-axis direction and the y-axis direction which are orthogonal to the pen axis 8, respectively.
Are provided so that the moving direction of the. For example, when the pen tip 9 is tilted, the weight 10 in the tubular case 12 moves inside the tubular case 12 to a position where the expansion / contraction force of the coil springs 11a and 11b and the influence of gravity are balanced according to the inclination of the pen tip 9. Moving. For example, as shown in FIG. 3, when the pen tip 9 is inclined and the axis Z orthogonal to the writing surface 13 and the pen axis 8 form an angle θ in the y axis direction when the pen axis 8 is the z axis, Assuming that the weight is M and the tree force or velocity is g, the weight 10 receives a force of Mgsinθ in the y-axis direction due to gravity as shown in FIG.
Therefore, assuming that the spring constants of the coil springs 11a and 11b are k and the movement distance of the weight 10 in the y-axis direction when the pen axis is the z-axis is y, 2ky = Mgsinθ. Similarly, when the pen axis 8 at an angle formed by the axis Z orthogonal to the writing surface 13 and the pen axis 8 is the z axis, the component in the x axis direction is ψ, and x of the weight 10 is
If the moving distance in the axial direction is x, then 2kx = Mgsin ψ. The weight position detecting means including the weight position detecting photosensors 4a and 4b is provided along the inclination detecting means 3a and 3b. The weight position detection photo sensors 4a and 4b are
The position of the weight 10 of the corresponding inclination detecting means 3a, 3b is detected.

As shown in FIG. 5, the arithmetic unit 5 has a moving direction detecting means 51, a moving amount detecting means 52, an inclination calculating means 53 and a correcting means 54. The moving direction detecting means 51 is arranged in the x-axis direction and the y-axis direction detected by the acceleration sensors 2a and 2b.
The moving direction of the pen-type coordinate input device 1 is detected from the magnitude of the directional acceleration. The movement amount detecting means 52 is the acceleration sensor 2
The amount of movement of the pen-type coordinate input device 1 is detected from the magnitudes of accelerations in the two directions detected by a and 2b. Inclination calculation means 53
Is a movement distance x from the reference position in the x-axis direction of the weight 10 from the weight position detection photosensor 4a and a movement distance y from the reference position in the y-axis direction of the weight 10 from the weight position detection photosensor 4b. 2kx = Mgsin ψ and 2ky = Mgsin
θ is calculated, and the inclination angles ψ and y of the pen tip portion 9 in the x-axis direction are calculated.
The tilt angle θ in the axial direction is calculated. The reference position is the position of the weight 10 when the inclination detecting means 3a and 3b are placed horizontally while the coil springs 11a and 11b are in a balanced state.

The correcting means 54 includes an inclination angle ψ in the x-axis direction and an inclination angle θ in the y-axis direction of the weight 10 detected by the inclination calculating means 53.
Based on the above, the movement amount in the x-axis direction and the movement amount in the y-axis direction of the weight 10 detected by the movement amount detection means 52 are corrected. For example, the acceleration A in the x-axis direction of the weight 10 detected by the acceleration sensor 2a
x and the actual acceleration Bx on the writing surface 13 are Bx = (Ax) co
The relationship of sψ holds. For example, if ψ is 45 degrees, Ax =
(Bx) / (cos45), which means that only about 0.7 times the actual acceleration can be detected. Therefore, the movement amount obtained by integrating twice is smaller than the actual movement amount. The correction means 54 obtains this decreasing rate based on the inclination angle ψ in the x-axis direction and the inclination angle θ in the y-axis direction of the pen tip 9 detected by the inclination calculation means 53, and corrects it so that it approaches the actual value. .

The storage unit 6 stores the movement direction and movement amount of the pen-type coordinate input device corrected by the correction means 54 in time series, and stores the shape of the writing figure by the pen-type coordinate input device.

By using the pen-type coordinate input device having the above structure, the inclination of the pen tip 9 can be detected, and the movement direction and the amount of movement on the writing surface 13 can be corrected based on the inclination of the pen tip 9. Therefore, the detection error of the movement amount of the pen tip portion 9 due to the inclination of the pen tip portion 9 can be reduced.

Next, as another embodiment, as shown in FIG. 6, one inclination detecting means 3a is provided with the moving direction of the weight 10 in the axial direction orthogonal to the pen shaft 8 and the other inclination detecting means 3b. A case will be described in which is provided with the moving direction of the weight 10 facing the pen shaft 8 direction.

Similarly to the above, assuming that the pen shaft 8 and the axis Z perpendicular to the writing surface 13 are inclined by an angle ψ in the X-axis direction and an angle θ in the Y-axis direction, the angle of inclination of the pen shaft 8 with respect to the Z-axis. Is γ, the distance from the contact point between the pen tip 9 and the writing surface to the weight 10 is a, the length of a line drawn from the weight 10 perpendicular to the Y axis is b,
The length of the weight 10 drawn perpendicularly to the X axis is c, and the length a on the X axis of the distance a from the contact point between the pen tip 9 and the writing surface to the weight 10 is the X and Y axes. When the length is Y and the length on the Z axis is Z, the following equation holds.

[0030]

[Equation 1]

When cosγ is obtained from the above equation, the following equation is obtained.

[0032]

[Equation 2]

Therefore, the weight 10 of the inclination detecting means 3b provided along the pen shaft 8 receives the force F expressed by the following equation in the pen shaft 8 direction.

[0034]

(Equation 3)

Therefore, if the moving distance of the weight 10 in the direction of the pen tip 9 is R, the following relationship holds.

[0036]

(Equation 4)

In the weight 10 of the inclination detecting means 3a provided along the x-axis, as described above, 2kx = Mgsinψ
Therefore, the inclination calculating means 53 can obtain the inclination angle ψ in the x-axis direction and the inclination angle θ in the y-axis direction of the pen tip portion 9 from these equations. In this way, the inclination detecting means 3
Since b is provided along the pen shaft 8, it is not necessary to increase the diameter of the pen-type coordinate input device 1 according to the length of the guide portion 3b, and the pen-type coordinate input device 1 can be downsized.

Here, the force detected by the weight 10 of the inclination detecting means 3b provided with the detection direction facing the pen shaft 8 is x.
Since the combined force of the forces in the axial direction and the y-axis direction is usually strongly influenced by gravity, it is better to improve the accuracy of detecting the amount of movement of the weight 10 of the tilt detecting means 3b by increasing the tilt angle ψ and the tilt angle ψ in the x-axis direction. In many cases, the tilt angle θ in the y-axis direction can be accurately obtained. Therefore, the inclination detecting means 3 provided along the pen shaft 8
The length of the coil springs 11a, 11b of b may be made longer than the coil springs 11a, 11b of the inclination detecting means 3a provided along the x-axis, and the detection accuracy may be improved by increasing the spring constant.

Further, generally, the inclination angle of the pen tip portion 9 is not changed drastically during writing, but since the pen-type coordinate input device 1 may be turned during non-writing, in that case, the inclination of In order to prevent the detection, the pen tip contact detection means 14 including a pressure sensor or the like for detecting the presence or absence of contact between the pen tip portion 9 and the writing surface 13 is provided, and the inclination calculation means 53 includes the pen tip portion contact. The detecting means 13 may detect the inclination of the pen tip portion 9 only when the pen tip portion 9 and the writing surface 13 are in contact with each other.

Further, as shown in FIG. 7, in addition to the acceleration sensors 2a and 2b provided on the pen tip 9, the acceleration sensors 2c and 2d are provided at the pen end of the pen-type coordinate input device 1 similarly to the acceleration sensors 2a and 2b. The moving direction detecting means 51 and the moving amount detecting means 52 may detect the moving amount and the moving direction of the pen-shaped coordinate input device 1 at the pen tip 9 and the pen end. In this case, the computing unit 5a has moving direction detecting means 51a, 51b, moving amount detecting means 52a, 52b, and moving computing means 55 as shown in FIG. Since the movement amount and the movement direction of the pen-type coordinate input device 1 are detected by the pen tip portion 9 and the pen end portion, for example, when the inclination angle of the pen-type coordinate input device 1 is changed during writing as shown in FIG. Even if there is, a change in the tilt angle can be detected from the difference in the movement amount between the pen tip 9 and the pen end. The movement calculation means 55 can accurately detect the movement amount of the pen tip 9 on the writing surface 13 from the distance between the acceleration sensors 2a and 2b and the acceleration sensors 2c and 2d and the detection results of the movement amount detection means 52a and 52b. it can. The above-mentioned detection is performed by the pen tip contact detection means 1
4 may be performed when it is detected that the nib portion 9 and the writing surface 13 are in contact with each other.

Further, as shown in FIG. 10, the pen grip portion 16 may be provided with, for example, a flexible rubber 17 having irregularities or a finger shape so that the finger does not slip. This can prevent the pen tip 9 from rotating during writing.

Further, a lead of a mechanical pencil or a ball-point pen may be attached to the pen tip portion 9 so that a figure or the like can be input and writing can be made directly on paper or the like.

[0043]

As described above, the present invention detects the positions of two weights held in equilibrium in two different directions orthogonal to the pen axis by a pair of coil springs, and based on the detected positions of the weights. Since the inclination angle and the inclination direction of the pen tip portion are calculated and the movement amount and the movement direction on the writing surface are corrected, the detection error of the movement amount due to the inclination of the pen tip portion can be reduced with a simple configuration.

Furthermore, since the moving direction of one weight is provided in the axial direction orthogonal to the pen axis, and the moving direction of the other weight is provided in the pen axial direction, the pen tip portion is small in a small device. It is possible to accurately detect the movement amount and the movement direction and prevent the diameter of the pen-type coordinate input device from increasing.

Further, since the spring constant of the coil spring that balances and holds the weight in the axial direction orthogonal to the pen axis and the spring constant of the coil spring that balances and holds the weight in the pen axial direction are changed, the pen can be used in a small device. The detection accuracy can be improved when detecting the movement amount and the movement direction of the front portion.

Further, when it is detected that the pen tip portion and the writing surface are in contact with each other, the inclination of the pen tip portion is detected, so that the input timing can be determined without using an enable switch or the like.

Further, the amount of movement and the direction of movement of the pen-type coordinate input device in a plane orthogonal to the pen axis at a position separated by a certain distance in the pen axis direction are detected to detect contact between the pen tip portion and the writing surface. Since the movement direction and the movement amount on the writing surface are obtained from the movement amount and the movement direction of the pen-type coordinate input device detected at the positions apart from each other in the two pen axis directions, the input timing can be obtained without using the enable switch or the like. It is possible to accurately determine the movement direction and the movement amount of the pen-type coordinate input device with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a side view of a tilt detecting means.

FIG. 3 is an explanatory diagram illustrating an inclination of a pen axis.

FIG. 4 is an explanatory diagram showing a force acting in the y-axis direction due to a tilt in the y-axis direction.

FIG. 5 is a configuration diagram of an operation diagram.

FIG. 6 is a layout view of inclination detecting means of another embodiment.

FIG. 7 is a configuration diagram when an acceleration sensor is provided in a pen tip portion and a terminal end portion.

FIG. 8 is a configuration diagram of a calculation unit when an acceleration sensor is provided in a pen tip portion and a distal end portion.

FIG. 9 is a process diagram showing a transition of inclination.

FIG. 10 is a side view of a pen grip portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pen type coordinate input device 2 Acceleration sensor 3 Tilt detection means 4 Photo sensor for weight position detection 5 Calculation part 5a Calculation part 51 Movement direction detection means 52 Movement amount detection means 53 Tilt calculation means 54 Correction means 55 Movement calculation means 6 Storage section 7 Power Supply Section 8 Pen Axis 9 Pen Tip 10 Weight 11 Coil Spring 12 Cylindrical Case 13 Writing Surface 14 Pen Tip Contact Detection Means

Claims (5)

[Claims] 1. A pen-type coordinate input device for inputting a coordinate and a writing shape on the basis of the moving direction and the moving amount detected by detecting the moving direction and the moving amount on a writing surface. Two weight position detecting means, inclination calculating means, and correcting means are provided, and each inclination detecting means has a weight that is held in equilibrium by a pair of coil springs housed in a case, and the moving direction of each weight is determined by the pen axis. 2 which is orthogonal to
Each weight position detecting means is provided along the inclination detecting means, detects the position of the weight of the corresponding inclination detecting means, and the inclination calculating means detects each inclination detecting means detected by the weight position detecting means. The tilt angle and the tilt direction of the pen tip portion are calculated based on the position of the weight of the pen tip, and the correction means calculates the movement amount and the moving direction on the writing surface based on the tilt angle and the tilt direction of the pen tip portion calculated by the tilt calculation means. A pen-type coordinate input device that corrects 2. One inclination detecting means is provided so that the moving direction of the weight is oriented in the axial direction orthogonal to the pen axis, and the other inclination detecting means is provided so that the moving direction of the weight is oriented in the pen axis direction. Item 2. A pen-type coordinate input device according to item 1. 3. A spring constant of a coil spring composed of an inclination detecting means provided with a weight moving direction in an axial direction orthogonal to the pen axis and an inclination detecting means provided with a weight moving direction in the pen axis direction. The pen-type coordinate input device according to claim 2, wherein 4. A pen tip contact detection means for detecting the presence or absence of contact between the pen tip portion and the writing surface, wherein the pen tip contact detection means detects that the pen tip portion and the writing surface are in contact with each other. Sometimes, the inclination of the pen tip is detected.
Pen-shaped coordinate input device described. 5. A pen-type coordinate input device for inputting a coordinate and a writing shape based on the moving direction and the moving amount detected by detecting the moving direction and the moving amount on the writing surface. And two movement detecting means and movement calculating means, the pen tip contact detecting means detects the presence or absence of contact between the pen tip and the writing surface, and the two movement detecting means are separated by a certain distance in the pen axis direction. Is located at a different position on the pen axis, and detects the amount and direction of movement of the pen-type coordinate input device on a plane orthogonal to the pen axis at a remote position on the pen axis. The movement direction and movement on the writing surface based on the movement amount and movement direction of the pen-type coordinate input device on the plane orthogonal to the pen axis detected by the two movement detecting means when detecting the contact between the writing surface and the writing surface. Pen type characterized by finding quantity Coordinate input device.