Mouse

[0056]FIGS. 1 to 4 show a mouse according to the invention.

[0057]In these figures, a mouse 10 is constituted by a case 11, an optical movement detector 12 provided in the case 11, an LED 13 to be a light emitter, two operation buttons 14 and 15 provided on the upper face of the case 11, switches 14a and 15a provided in the case 11 for being operated by the two operation buttons 14 and 15, a wheel 16 provided between the operation buttons 14 and 15, a lens optics 17, and an adapter unit 20 for accepting a storage medium.

[0058]The optical movement detector 12 and the LED 13 are mounted on a board 18 provided in the case 11.

[0059]Moreover, the case 11 is actually constituted by a lower case 11a and an upper case 11b.

[0060]The optical movement detector 12 is constituted to be a semiconductor chip and has a light receiving face 12a provided on a lower face thereof.

[0061]The optical movement detector 12 has been put on the market as an optical sensor, for detecting a change in the state on