| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a button device for a game machine, which shows a high performance effect. <P>SOLUTION: A magnetic sensor 525 detects the movement position of a button operation member 301 with respect to an inner fixing part. A focusing means moves a projection lens 522b based on the detection result of the magnetic sensor 525. While an image to be displayed on a screen face 301e has been focused by the projection lens 522b, the light of an image to be displayed on the display face of a liquid crystal display device 501 is projected toward the screen face 301e by the projection lens 522b, consequently an image is displayed on the screen face 301e. Thereby the image displayed on the screen face 301e is visually recognized by a player via the transparent operation part 301b of the button operation member 301, and therefore a sufficient performance effect is shown without deteriorating operability. <P>COPYRIGHT: (C)2012,JPO&INPIT |
