JPH10207625A - Mouse for computer input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a mouse which hardly becomes defective in operation even when used for a long time by forming the contact part of a shaft transmitting power to an encoder detecting a movement quantity, with a sphere made of an elastic body in a convex or concave shaft shape. SOLUTION: When a mouse main body 1 is moved on a desk by hand, a rubber ball 6 rotates because of friction against the desk top. Power transmission shafts 3 and 5 are in contact with the rubber ball 6 at the edge parts of its concave parts 7 and 8, so that power rotary shafts 3 and 5 rotate. The edge parts of the concave parts 7 and 8 have extremely small contact area with the rubber ball 6, so dust sticking on the rubber ball 6 hardly sticks on the power transmission shafts 3 and 5, and even if it sticks, its sticking area is narrow, so a attractive force due to static electricity and vacuum suction can be suppressed to prevent dust from sticking and easily remove the sticking dust. Consequently, a defect in the operation of the mouse due to dust on the desk top can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mouse for a computer input device.

[0002]

2. Description of the Related Art As shown in FIG. 3, the structure of a conventional mouse is such that contact portions 9 and 10 of shafts 3 and 5 for transmitting power from rubber balls 6 to encoders 2 and 4 have irregularities. There was no cylindrical shape.

[0003]

However, in the above-mentioned prior art, when the mouse is used for a long time, dust on the desk on which the mouse is installed adheres to the rubber ball 6 of the mouse, and this is caused by the encoder. The shafts 3 and 5 that transmit power to the shafts 2 and 4 adhere to the contact portions 9 and 10 with the rubber balls 6. For this reason, even though the mouse is moved, the rubber ball 6 and the power transmission shafts 3 and 5 slip at the contact portions, making it difficult for power to be transmitted. There is a problem that the amount of movement of the mouse pointer on the computer screen is reduced.

Therefore, the present invention solves such a problem, and the object of the present invention is to solve the problem even when used for a long time.
The aim is to provide a mouse that is unlikely to malfunction.

[0005]

According to the present invention, there is provided a mouse having a shaft for transmitting power to an encoder for detecting an amount of movement, and a ball made of an elastic body for operating the shaft. It is characterized in that a contact portion with a sphere made of a body has a convex or concave axial shape.

[0006]

In the mouse constructed as described above, the contact area between the sphere and the shaft can be reduced as much as possible by making the shaft shape of the contact surface with the sphere made of an elastic body as small as possible. In addition, it is possible to suppress the effect of the vacuum suction force, thereby preventing the attachment of dust and easily removing the attached dust.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a structural view (plan view) showing the structure of a main part of a mouse according to the present invention. When the mouse body 1 is moved on the desk by hand, the rubber ball 6 is rotated by the frictional force with the surface of the desk. The power transmission shafts 3 and 5 rotate because the power transmission shafts are in contact with the rubber balls 6 at the edges of the concave portions 7 and 8 of the power transmission shafts 3 and 5. Since the contact area between the edge portions of the recesses 7 and 8 and the rubber ball 6 is very small, dust adhered to the rubber ball 6 is difficult to adhere to the power transmission shafts 3 and 5, and even if adhered, the adhered area is small. Therefore, it is easily removed during mouse use,
Malfunctions are less likely to occur.

FIG. 2 is a view showing another embodiment of the present invention, in which power transmission shafts 3 and 5 are provided with projections 7 and 8. It is easily understood that the present embodiment has the same operation and effect as the above-described embodiment.

[0010]

As described above, according to the mouse of the present invention, by providing the power transmission shaft with a convex or concave shape, the mouse can be prevented from malfunctioning due to dust on the desk.

[Brief description of the drawings]

FIG. 1 is a configuration diagram (plan view) of a main part showing an embodiment of the present invention.

FIG. 2 is a configuration diagram (plan view) of a main part showing another embodiment of the present invention.

FIG. 3 is a configuration diagram (plan view) of a main part showing a conventional mouse.

[Explanation of symbols]

 1 Mouse body 2, 4 Encoder 3, 5 Power transmission shaft 6 Rubber ball 7, 8 Convex or concave 9, 10 Contact surface

Claims (1)

[Claims] 1. A mouse provided with a shaft for transmitting power to an encoder for detecting a moving amount and a ball made of an elastic body for operating the shaft, wherein a contact portion of the shaft with the ball made of the elastic body is convex. Or a mouse for a computer input device characterized by having a concave shaft shape.