Abstract: Disclosed is a thin key sheet that is relatively free from breakage due to depressing operation. When key tops are depressed, float-supporting portions of rubber moldings and a film sheet undergo deformation, and a depression load can be borne by both the float-supporting portions and the film sheet, so the load on the float-supporting portions is mitigated, making the float-supporting portions less subject to breakage. Further, since the film sheet exists between the rubber moldings and a resin plate, it is possible to prevent the rubber moldings from being rubbed against a side wall of a frame portion, making it possible to prevent breakage due to rubbing between the rubber moldings and the resin plate.

Abstract: Provided is a stable key sheet in which, even if a key top is operated so as to be shifted sidewise, no excessive change, such as great tottering of the key top or overlapping of key tops each other, is caused. A key sheet including: a key top having a fixation protrusion protruding from a center of a bottom surface; and a base sheet to which the fixation protrusion is fixed, further includes a stopper plate having an opening through which the fixation protrusion of the key top is passed and whose edge faces a side of the fixation protrusion, in which, at a time of sidewise movement of the key top, the stopper plate abuts the key top to regulate the sidewise movement of the key top.

Abstract: An object of the present invention is to provide a novel input operation device in which multi-functionality corresponding to higher functionality of electrical equipment can be achieved along with tactile functionality suitable as a man-machine interface. An input operation device (1) is provided with a switching portion (3) under a coordinate operation portion (2) that has dome-shaped coordinate operation portions (4a) and (5a) that are deformable due to operation press forces. An operator can perceive the deformation of the coordinate operation portion (2) during a coordinate operation as tactile operational feel.

Abstract: Disclosed is a thin key sheet that is relatively free from breakage due to depressing operation. When key tops are depressed, float-supporting portions of rubber moldings and a film sheet undergo deformation, and a depression load can be borne by both the float-supporting portions and the film sheet, so the load on the float-supporting portions is mitigated, making the float-supporting portions less subject to breakage. Further, since the film sheet exists between the rubber moldings and a resin plate, it is possible to prevent the rubber moldings from being rubbed against a side wall of a frame portion, making it possible to prevent breakage due to rubbing between the rubber moldings and the resin plate.

Abstract: A self-lighting type push-button input device according to the presently disclosed subject matter can include a button base portion formed of a transparent material. Holes can be formed in predetermined positions of the button base portion, and spring portions can be formed integrally with the holes by molding transparent silicone rubber with a light diffusing agent incorporated therein. The button base portion serves as a light conducting portion, and the spring portions can uniformly diffuse the light distributed thereto by the light conducting portion, whereby lighting can be effected by a reduced number of light sources, effecting a reduction of size and cost.

Abstract: Provided is a stable key sheet in which, even if a key top is operated so as to be shifted sidewise, no excessive change, such as great tottering of the key top or overlapping of key tops each other, is caused. A key sheet including: a key top having a fixation protrusion protruding from a center of a bottom surface; and a base sheet to which the fixation protrusion is fixed, further includes a stopper plate having an opening through which the fixation protrusion of the key top is passed and whose edge faces a side of the fixation protrusion, in which, at a time of sidewise movement of the key top, the stopper plate abuts the key top to regulate the sidewise movement of the key top.

Abstract: In conventional self-lighting type push-button input devices there is adopted a construction wherein push-button portions and a base plate are formed using the same material. Since a light conducting function cannot be expected of the base plate, it is necessary to provide the same number of lamps as the number of push-button portions, with consequent increase of size and cost. In a self-lighting type push-button input device according to the present invention, a button base portion can be formed of a transparent material, holes can be formed in predetermined positions of the button base portion, and spring portions can be formed integrally with the holes by molding with use of transparent silicone rubber with a light diffusing agent incorporated therein.

Abstract: An object of the present invention is to provide a novel input operation device in which multi-functionality corresponding to higher functionality of electrical equipment can be achieved along with tactile functionality suitable as a man-machine interface. An input operation device (1) is provided with a switching portion (3) under a coordinate operation portion (2) that has dome-shaped coordinate operation portions (4a) and (5a) that are deformable due to operation press forces. An operator can perceive the deformation of the coordinate operation portion (2) during a coordinate operation as tactile operational feel.