JP2001290588A - Method for detecting movement quantity of mouse and mouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movement quality method for a mouse which enables miniaturization and to obtain a mount which is lightweight and enable even an aged beginner to easily operate a personal computer. SOLUTION: The moving direction θ and the movement δR of a mouse are detected from the turning quantity of a main shaft 2 having a roller shaft 11 and the turning quantity of a roller on the basis of the principle of a caster, and the moving state of the mouse is acquired from the θ and the δR and the movement quantity of the mouse is sent as data on the moving direction θand movement quantity δR of the mouse or data on δX and δY to a computer The turning quantity of the shaft 11 of the roller 10 and/or the turning quantity of the roller is detected through the constitution of a rotary encoder. The turning quantity of the shaft 11 of the roller 10, in particular, is detected preferably by a light reflection type photoreflector 14. Consequently, a pen type mouse which can be made small-sized is obtained and a mouse which enables even a beginner to easily operate a personal computer can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointing device used for input of a personal computer or the like.

[0002]

2. Description of the Related Art Personal computers are becoming more and more popular in daily life. As personal computers have become widespread, man-machine interfaces have been improved so that general users can easily use them. In Japan, the most basic keyboard is less accepted by the general public in Japan than in Europe and the United States, where typewriters were widely used in advance. In recent years, with the spread of a system based on a GUI (graphic user interface), a pointing device (hereinafter referred to as a “mouse”) has become a great driving force for generalization of personal computers. However, although mouse operation can be mastered relatively quickly for children and young people, it is generally difficult for elderly people, and the spread of personal computers has fallen behind in these classes. If the mouse is made into a pen shape, it is thought that a beginner, particularly an elderly person, can move the pointer in a shape that has been used for many years, and it will be easier to accept a personal computer.

[0003]

Conventionally, a mouse which has been widely used has a spherical body called a mouse ball having a diameter of about 2 cm and a side face of the spherical body in which the axes of two rotary encoders are perpendicular to each other. The moving distance of the rolling sphere is detected separately in the X direction and the Y direction. Therefore, if slippage occurs between the rotary encoder and the axis of the mouse ball, the operability deteriorates. The flatness of the surface of the mouse pad is also required, and above all, the structure is not suitable for miniaturization. Thus, the present inventors have conducted intensive studies on a novel mouse structure, and have reached the present invention. An object of the present invention is to provide a new method for detecting coordinate movement suitable for miniaturization without using a mouse ball, and a mouse using the method.

[0004]

In order to achieve the above object, a method for detecting the amount of movement of a mouse according to the present invention comprises: a main shaft pivotally supported by a mouse body; a roller shaft vertically supported by the main shaft;
The roller that rolls around the roller shaft is disposed so that the contact point between the roller and the mouse pad surface deviates from an extension of the center of the main shaft. When the mouse is moved on the mouse pad surface, the main shaft rotates so that the extension line of the main shaft center precedes the roller and the contact point of the mouse pad surface, and the moving direction of the mouse is determined from the rotation angle of the main shaft. The moving distance of the mouse is detected from the rotation amount. The same effect can be obtained by arranging the contact point between the roller and the mouse pad surface on an extension of the center of the spindle, and disposing the contact point between the tail portion and the mouse pad surface out of the extension of the center of the spindle.

The mouse according to the present invention comprises a mouse body, a main shaft supported by the mouse body, a roller shaft supported at the tip of the main shaft perpendicular to the main shaft, and a roller rolling about the roller shaft. Means for detecting the rotation angle of the main shaft and the amount of rotation of the roller, respectively. Or, the mouse body, a main shaft supported by the mouse body, a roller shaft supported at the tip of the main shaft perpendicular to the main shaft, a roller rolling around the roller shaft, and a mouse pad surface fixed to the shaft. An extending tail,
Means for detecting the rotation angle of the main shaft and the amount of rotation of the roller, respectively. When the mouse is moved on the mouse pad surface, the main shaft rotates so that the extension line of the main shaft center precedes the roller and the contact point of the mouse pad surface, or the point where the roller contacts the mouse pad surface is the tail and the mouse. The main shaft rotates so as to precede the point where the pad surface comes into contact, and the detected data of the rotation angle of the main shaft and the amount of rotation of the roller are output to a computer or the like. As a means for detecting the rotation amount of the main shaft and / or the roller, a magnetic or optical rotary encoder can be used. In this case, it is preferable that the rotation angle of the main shaft is constituted by an absolute type encoder and the rotation amount of the roller is constituted by an incremental type encoder. The amount of rotation of the main shaft and / or the roller may be detected by using a photoreflector or a laser pickup to detect light reflected from a peripheral surface of a rotating disk or a roller provided on the main shaft. Since the mouse having the movement amount detection unit according to the present invention can be made small, it becomes possible to make the mouse into a pen shape. The pen tip portion accommodating the roller and the main shaft may be attached so as to be tiltable with the pen shaft so that the main shaft is always maintained perpendicular to the mouse pad surface F during use.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The mouse movement amount detection method of the present invention basically eliminates the conventional mouse ball of a mouse, and detects the movement using a single roller by applying the principle of a conventionally known caster. Specifically, a roller provided with a caster is provided on the mouse, and the movement direction θ and the movement distance δR are detected from the rolling direction and the rotation amount thereof, and the movement amount (XY coordinate) is reflected on the movement of the pointer on the GUI screen. Change, that is, δ
X, δY) are detected. In this specification, a surface such as a desk or a workbench, a mouse pad placed on them, fixed paper, or the like, is generally referred to as a mouse pad surface on which a mouse is moved. Hereinafter, description will be made with reference to FIG. A leg 3 is bifurcated below a main shaft 2 that is vertically supported on a mouse pad surface F on a mouse body 1 (not shown). A roller 10 is supported between the legs 3. The leg 3 is bent in one direction like a fork, and the roller shaft 11 is arranged at a certain distance from an extension of the main shaft 2 (center line M of the main shaft). This distance is called an offset OS. As a result, the contact point Q between the roller 10 and the mouse pad surface F is shifted from the point Q ′ where the extension line M at the center of the spindle 2 intersects the mouse pad surface F. This shift amount is called a shift OS ′. The roller 10 itself is rotatable in the direction A in a plane including the main shaft 2, and the shaft 11 of the roller 10 is rotatable in the direction B in a plane perpendicular to the main shaft 2 with the rotation of the main shaft 2. .

When the mouse body 1 is moved on the mouse pad surface F, a point Q 'where the extension line M of the main shaft 2 intersects the mouse pad surface F is a direction preceding the contact Q between the roller 10 and the mouse pad surface F. Then, the main shaft 2 rotates, and the roller 10 further rotates according to the moving distance. Therefore, when the mouse moves in the direction D, the state shown in FIG. 1A is maintained, and when the mouse advances in the direction C, the main shaft 2 rotates 180 degrees in the direction B to reach the state shown in FIG. 1B. Then, the roller 10 rotates. Even if the moving direction (angle within the plane) changes during the movement, the rotating surface of the roller 10 follows and follows the moving direction. Therefore, the moving direction (angle within the plane) of the mouse can be detected from the rotation amount of the main shaft, and the movement amount of the mouse can be detected from the rotation amount of the roller. The smaller the offset distance OS, the better the response when the mouse starts moving is better. However, as will be described later, a larger value is better for normal operation even when the mouse itself is tilted. The offset OS is determined in consideration of this situation.

The offset distance OS is set to zero, and the roller shaft 11 is located on an extension line of the main shaft (center line M of the main shaft) as shown in FIG. It can also be detected by providing the tail part 4. The tail extends downward on the centerline M of the spindle,
When the mouse is dropped on the mouse pad F, the mouse comes into contact with the mouse pad surface F before the roller and is tilted or elastically deformed in the direction opposite to the moving direction. When the mouse is moved in the direction A, the main shaft 2 rotates about the contact point Q ′ between the tail portion 4 and the mouse pad surface F, and the roller shaft 11 is always perpendicular to the mouse moving direction A in a horizontal plane, and The contact point Q on the mouse pad surface F is in the moving direction A
Preceded the contact point Q ′ between the tail portion 4 and the mouse pad surface. Therefore, also in this case, the moving direction θ on the coordinates of the mouse can be detected from the amount of rotation of the main shaft, and the moving distance δR of the mouse can be detected from the amount of rotation of the roller, and the same effect as in the case of the caster can be obtained. It is preferable that the tail part 4 can be bent only in the rotation plane of the roller 10. It is also conceivable that the tail portion 4 can be bent only in one direction in the rotation plane of the roller 10. Hereinafter, an example of the caster system according to the present invention will be described in more detail, but the same applies to the system provided with the tail 4.

While the mouse is moving, the moving direction θ is detected from the rotation angle of the main shaft 2 as shown in FIG.
The movement distance δR is detected from the amount of rotation of. If the reference of the rotation angle is the X axis, the change amount X of the X coordinate (= δRcosθ) and the change amount δY of the Y coordinate (= Y ( =
δR sin θ), and outputs the signal to a personal computer or the like as a signal.
The pointer coordinates on the I screen can be moved according to the amount of movement of the mouse. From the detected moving distance δR and moving direction θ, a change δX in the X coordinate and a change δY in the Y coordinate are calculated. The conversion of (δR, θ) → (δX, δY) may be performed in a fixed time unit.

The conversion of (δR, θ) → (δX, δY) may be performed by the mouse, but the signals of the moving distance δR and the moving direction θ are sent to a personal computer or the like, and the X coordinate change amounts δX and Y The calculation of the coordinate change δY can also be performed on the side of a personal computer or the like. In this case, the data to be sent to the personal computer is data relating to δR and the moving direction θ. However, since the moving direction θ is slightly changed by normal use, the data to be transmitted is mostly data relating to the moving distance δR, and is transmitted to the personal computer. The amount of data sent is very small.

The main shaft 2 may be slightly inclined with respect to the mouse pad surface F, and may have a constant inclination α or any angle in the rotation direction of the main shaft 2 in relation to the offset OS.
(The center line M of the main shaft) should not pass through the contact point Q between the roller 10 and the mouse pad surface F. That is, even if the main shaft 2 is inclined by the inclination α, FIG.
When the main shaft 2 is moved in the direction A, the roller 10 rotates while the main shaft 2 remains as it is. On the other hand, when the main shaft 2 is moved in the direction B, the main shaft 2 rotates by 180 degrees (FIG. 3B), and the extension line Q 'of the center M of the main shaft 2 comes before the contact point Q between the roller 10 and the mouse pad surface F. Rotates. For this normal operation, the contact point Q 'must be on the left side of the contact point Q in FIG. 3A, and if the radius of the roller 10 is r, OS> rsin
It turns out that it is necessary to be α. However, basically, when the main shaft 2 is perpendicular to the mouse pad surface F, the rotation of the main shaft 2 following the movement of the mouse becomes the most stable.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The rotation amount .theta. Of the main shaft and the rotation amount .delta.R of the roller which operate as described above are detected by, for example, a method described below. The detection of the rotation direction θ of the main shaft 2 is designed by a known technique related to an optical or magnetic rotary encoder. For example, as shown in FIG.
Is provided above the main shaft 2, and the rotation amount of the disk 12 is detected as a pulse train (FIG. 4B) by a photo interrupter 13 in which an LED and a phototransistor / photodiode are arranged to face each other across a slit 12a. . In general, the direction in which the mouse moves (the rotation angle θ of the spindle 2) is always corrected by the operator in practical use.
The disk 12 can be made relatively small because it does not require much precision. For example, if the resolution is set to 5 degrees and the disk 12 is provided with 72 slits 12a having a circumferential size of 0.5 mm and a width of 1 mm at a pitch of 1 mm, a disk 12 having a diameter of about 20 mm is sufficient.

Further, in addition to the first interrupter 13a, a second interrupter 13b is provided at a position shifted by 0.5 mm or less (half the pitch, strictly speaking, the phase is a half cycle) in the circumferential (angular) direction. The output is as shown in FIG. 4 (c). By comparing these outputs, the direction of rotation of the disk 12 (the distinction between clockwise and counterclockwise) can be detected. Further, the resolution can be increased by increasing the number of photo interrupters 13 as necessary. These known means regarding the optical encoder are appropriately adopted. It is preferable that the rotational moment of the disk 12 be as small as possible for smooth rotation of the main shaft 2, and a light material such as a thin resin plate is employed. Spindle 2
It is necessary to always grasp the rotation angle θ as an absolute amount with respect to the mouse main body 1. Therefore, it is preferable to configure the rotary encoder as an absolute type by a known means such as providing a reference point on the disk 12. Of course, a magnetic type can also be adopted if necessary. In this case, the surface or the peripheral side surface of the disk 12 is magnetized with NSNS in the circumferential direction, and rotation is detected by a magnetic head and a magnetic sensor. Further, a detection method using a photoreflector 14 described later can also be adopted.

The width of the roller 10 is preferably as small as possible so that the main shaft 2 can easily rotate following the moving direction of the mouse on the mouse pad surface F. In that sense, the circumferential section is preferably tapered as shown in FIG. Further, needle-like projections 10c may be provided on a flat peripheral surface as shown in FIG. The amount of rotation of the roller 10 is controlled by the main shaft 2
The rotation may be detected by a photo interrupter 13 provided with a slit 12a similar to the disk 12 of FIG.
The photo-interrupter 13 is always attached to the main shaft 2 with the roller 10.
It is necessary to follow the rotation of. That is, when the photo interrupter 13 is fixed to the main shaft 2 and the wiring 14b for extracting the signal of the photo interrupter 13 is connected to the main body,
The twisting of the wiring occurs with the rotation of the main shaft 2.

In order to avoid this, for example, as shown in FIG. 6 (a), a stripe pattern 10b having light and shade arranged at regular intervals in the circumferential direction is attached to the peripheral side surface of the roller 10 and fixed to the mouse body 1 (not shown). Main shaft 2 on the upper side surface around roller 10
Is fixed to the mouse body 1 (not shown) which is composed of an LED, a phototransistor, a photodiode, and the like, which are arranged on the extension line M of the mouse, and detects reflected light. Preferably, it is detected. Reflector 14 main body and associated wiring 14
b and the like pass through a through hole 2b formed in the center of the main shaft 2 (FIG. 6b). Then, the photoreflector 14 is moved to the spindle 2
Even if it is fixed to the mouse body 1 without fixing it to the
0, the photoreflector 14 disposed opposite to the peripheral side surface
Can detect the rotation of the roller 10 as a pulse from the stripe pattern 10b attached to the peripheral side surface of the roller 10 regardless of the rotation of the main shaft 2.

The reflection of light may be detected by a photoreflector 14 in which the tip of an optical fiber or the like is arranged to face the peripheral side surface of the roller 10 and multiple ends of the optical fiber or the like are opposed to each other. Glass, plastic or the like is used for the optical fiber. The roller 10 actually considers the shape of the peripheral side surface and, as shown in FIGS. 6C and 6D, provides a stripe pattern 10b in the recessed portion so that the roller 10 does not disappear due to abrasion or the like. The resolution of the rotation of the roller 10, that is, the moving distance δR of the mouse is determined by the stripe pattern 1.
0b, the stripe pattern 10
The pitch b is set as small as possible.

The peripheral side surface of the roller 10 may have a regular reflection surface 17 for light as shown in FIG. A polygon 15 is also conceivable. That is, the reflected light enters the photoreflector 14 only when the perpendicular H of the polygonal regular reflection surface 17 comes to the position of the photoreflector 14, and an output is generated. For example, in the case of an octagon, eight pulses are output from the reflector 14 while the roller 10 makes one rotation. For example, assuming that the diameter of the roller 10 is 10 mm, the resolution is 4
mm. Naturally, if the shape is a decagon, a decagon, etc., a corresponding resolution can be obtained. The photo reflector 14 is arranged so as to coincide with the extension line M of the main shaft 2 according to the offset OS of the roller shaft 11.

Further, as shown in FIG. 7B, when another octagon 15 of exactly the same shape is combined with an angle shifted by 22.5 degrees (half cycle of the phase), the output pulse per rotation becomes Double the resolution and double the resolution. In this manner, the resolution can be increased by combining a plurality of polygons 15 as needed. The polygon 15 is made of a metal such as stainless steel whose peripheral side is mirror-polished so that light is regularly reflected on the peripheral side.
It is made of glass or plastic with metal deposited on the peripheral side. Of course, in order to prevent the reflection surface from deteriorating or the like, the reflection surface may be coated or embedded with a transparent material such as plastic. The shape of the polygon 15 can be changed as required in FIG.
When the regular reflection surface 17 is given an appropriate curvature r in the shape shown in FIG.
Sensitivity can be increased. FIG. 7D shows an example in which a roller 10 having a cross section shown in FIG. 6D with a knurled shape on the periphery is combined with a polygon having a V-shaped concave portion on the periphery to be integrated. The jagged shape makes it possible to almost completely eliminate the sliding of the roller 10 with respect to the mouse pad F. Needle-like projections may be provided on the flat peripheral surface of the roller 10. The roller 10 slides less in the direction of rotation, and preferably slides in the direction perpendicular to the roller 10 (due to the rotation of the main shaft 2).
Therefore, it is preferable that the peripheral jagged portion 10c has a ridge line perpendicular to the surface direction of the roller.

In order to obtain a very fine resolution of a micron level, it is conceivable to provide a pit similar to an optical disk below the transparent layer on the peripheral side surface of the roller 10 and detect the pit with a laser pickup used in the optical disk. Can be A magnetized pattern may be provided on the surface or peripheral side surface of the roller 10 and a magnetic method may be used to detect the rotation amount. In this case, in addition to the magnetic head, a small and lightweight magnetic sensor using a semiconductor or metal having a Hall effect or a magnetoresistive effect is used. Further, if the roller 10 is rotated only in one direction in a ratchet type as required, it is possible to prevent a malfunction such that the roller turns without the main shaft being directed in the correct direction of movement of the mouse.

Even if the main shaft 2 is set so as not to be perpendicular to the mouse pad surface F, it is sufficient that the extension of the main shaft 2 is displaced from the contact Q between the roller 10 and the mouse pad surface F. The center line E of the pen shaft 21 and the main shaft 2 are arranged so that the main shaft 2 is as perpendicular to the mouse pad surface F as possible.
May be given a constant angle β (FIG. 8a). FIG.
As shown in (b), the pen shaft 21 and the pen tip 22 may be separated from each other so that β can be adjusted and supported. The user adjusts the inclination angle β to an optimum angle during use.

It is also possible to adopt a method in which the offset OS of the caster is not fixed. For example, as shown in FIG. 9, a roller 10 may be supported at the tip of a leg 3 that is supported by the main shaft 2 so as to be tiltable. In this case, the leg 3 is urged by a spring or the like to be parallel to the main shaft 2, and the roller shaft 11 intersects with an extension of the main shaft 2 (center line M of the main shaft). When the mouse is moved on the mouse pad surface F, the main shaft 2 rotates up to 90 degrees to the right or left, and the roller shaft 11 becomes perpendicular to the moving direction. It precedes the contact Q on the mouse pad surface F. The tilt direction is the microswitch 25 provided at an appropriate position on the spindle 2.
, And when tilted in the direction opposite to the reference direction, a signal related to the moving direction θ is given by θ + 180 (or θ−180)
Process as a degree. In this way, when the mouse starts moving, no matter what direction the main shaft 2 is in the moving direction, the main shaft 2 can be rotated within 90 degrees. The mouse according to the present invention is not limited to the above example, and the size, shape, material, and the like are selected by design.

FIG. 10 shows a specific example of a mouse using the moving amount detecting method according to the present invention. The main body 20, which has a shape that is easy to grasp like a pen, houses therein an electronic circuit for signal processing and a switch for clicking, and a cable 23 for transmitting a signal from an appropriate position to a personal computer is provided. An inclination angle β is attached to the pen shaft 21 of the mouse body 20. The pen tip 22 includes a spindle 2, a roller 10, a photo interrupter 13, a photo reflector 14, a support 14a, and the like.
c and the like are connected to the electronic circuit. A click button 24 is arranged at an appropriate position on the pen shaft 21 of the pen mouse 20. In this case, the right click button and the left click button may be provided by two click buttons 24 as usual, but here, a slide portion 26 is provided on the pen shaft 21 and when the pen shaft 21 is pressed down, the micro The projection 25b of the switch 25 is clicked (switched). In this way, the pen shape comes to life,
The mouse can be operated with a better pen feel. The right click may be performed by one push button 24 provided on the pen shaft.

When the conventional mouse 50 is operated on the mouse pad surface F having poor flatness, the mouse ball 51 rises as shown in FIG. 11A, and the movement of the mouse cannot be detected accurately. On the other hand, the pen mouse 20 according to the present invention can be used even on a mouse pad that is somewhat flat (FIG. 11b). For this reason, the mouse according to the present invention can provide a mouse that can be used even on a worn object by mounting it on a notebook personal computer that cannot secure a mouse pad. Needless to say, the mouse movement amount detection method of the present invention can also be adopted for a mouse having a conventional outer shape. In that case, there is no friction transmission from the mouse ball to the rotary encoder shaft like a conventional mouse,
It is possible to provide a maintenance-free and easy-to-use mouse that does not deteriorate due to dirt and oils.

[0024]

According to the method of the present invention, a mouse can be designed to be relatively small since a mouse ball is not required for the coordinate change detecting mechanism. It can be used on a mouse pad with poor flatness, so it can be used on documents and clothes. Because it can be made smaller, a pen-type mouse is also possible, and the mouse can be operated with the convenience of a familiar pen, realizing a pointing device that is easy to use for elderly people. The data to be sent to the personal computer is related to δR and θ. Among them, the data related to θ has little change and the amount of transmitted data is small, so that it is effective for speeding up response and simplifying hardware.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a main part of a mouse of the present invention.

FIG. 2 shows the relationship between the moving direction θ of the mouse and the moving distance δR to δ.
The figure explaining conversion to X, (delta) Y.

FIG. 3 is a diagram illustrating a state in which a main axis is inclined with respect to a mouse pad.

FIG. 4 is a diagram illustrating a mechanism for detecting a rotation amount of a main shaft.

FIG. 5 is a shape of a roller for detecting a moving amount of a mouse.

FIG. 6 is a diagram illustrating an example of a unit that optically detects a rotation amount of a roller.

FIG. 7 is a diagram illustrating an example of detecting a rotation amount of a roller using a polygon.

FIG. 8 is a diagram showing an example of a pen-type mouse according to the present invention in which a pen axis and a main axis have a fixed angle (a) and a variable angle (b).

FIG. 9 is a diagram showing an example in which a roller shaft leg is supported so as to be tiltable with respect to a main shaft.

FIG. 10 is a diagram showing an embodiment of a pen mouse.

FIG. 11 is a diagram for comparing and explaining operations of a conventional mouse (a) and a mouse (b) according to the present invention on a mouse pad surface.

FIG. 12 is a diagram illustrating a roller having a tail portion according to the present invention.

[Explanation of symbols]

1: Mouse body 2: Main shaft 2b: Through hole
3: leg 4: tail 10: roller 10b: stripe pattern 1
1: roller shaft 12: disk 12a: slit 12b: stripe pattern 13: photo interrupter 14: photo reflector 14a:
Support 14b: Wiring 15: Polygon 20: Pen-shaped mouse 21: Pen shaft 22: Pen tip 23: Cable 24: Click button 25: Micro switch 25b: Projection
26: Slide part 27: Electronic circuit 28:
Switch M: Center line of roller shaft F: Mouse pad surface
OS: Offset OS ': Offset Q: Contact between roller and mouse pad
H: perpendicular

Claims (7)

[Claims] 1. A main shaft pivotally supported by a mouse body, a roller shaft vertically supported by the main shaft, and a roller rolling around the roller shaft, wherein a contact point between the roller and the mouse pad surface is centered on the main shaft. A mouse movement amount detection method which is arranged so as to be shifted from an extension line and detects a mouse movement amount from a rotation angle of a main shaft and a rotation amount of a roller. 2. A main shaft pivotally supported by the mouse body, a roller shaft vertically supported by the main shaft, a roller rolling around the roller shaft, and a tail extending from the main shaft to the mouse pad surface, A method for detecting the amount of movement of a mouse, wherein the contact between the tail and the mouse pad surface is displaced from the extension of the center of the main shaft, and the amount of movement of the mouse is detected from the rotation angle of the main shaft and the amount of rotation of the roller. . 3. A mouse body, a main shaft pivotally supported by the mouse main body, a roller shaft vertically supported by the tip of the main shaft, a roller rolling around the roller shaft, and rotation of the main shaft. A mouse for detecting an angle and a rotation amount of the roller. 4. A mouse main body, a main shaft supported by the mouse main body, a roller shaft vertically supported by the main shaft at a tip of the main shaft, a roller rolling around the roller shaft, and fixed to the shaft. A mouse comprising: a tail portion extending to a mouse pad surface; and means for detecting a rotation angle of a main shaft and a rotation amount of a roller. 5. The mouse according to claim 3, wherein a means for detecting the amount of rotation of the main shaft and / or the roller is a magnetic or optical rotary encoder using transmitted light or reflected light. 6. The mouse according to claim 3, wherein the amount of rotation of the main shaft and / or the roller is detected by using a photoreflector or a laser pickup to detect light reflected from a peripheral surface of a rotating disk or a roller provided on the main shaft. 7. The pen according to claim 3, wherein the outer shape has a pen shape.
Mouse as described.