Some embodiments relate to an electric switching device, which comprises a switching contact, an actuation mechanism coupled to the switching contact and a motor coupled to the actuation mechanism. The actuation mechanism comprises a first spring, a first actuation plate coupled with the switching contact and a second actuation plate coupled with the motor. The actuation mechanism also comprises a first blocking element, which blocks the first actuation plate in a rotational blocking position and releases the first actuation plate in a rotational release position. The first spring is loaded by a movement of the motor. At some point in time, the second actuation plate or an actuating element connected thereto turns the first blocking element and thus releases the first actuation plate. As a consequence, the first actuation plate starts to move and finally actuates the switching contact.

Some embodiments relate to an electric switching device, which comprises a switching contact, an actuation mechanism coupled to the switching contact and a motor coupled to the actuation mechanism. The actuation mechanism comprises a first spring, a first actuation plate coupled with the switching contact and a second actuation plate coupled with the motor. The actuation mechanism also comprises a first blocking element, which blocks the first actuation plate in a rotational blocking position and releases the first actuation plate in a rotational release position. The first spring is loaded by a movement of the motor. At some point in time, the second actuation plate or an actuating element connected thereto turns the first blocking element and thus releases the first actuation plate. As a consequence, the first actuation plate starts to move and finally actuates the switching contact.

A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.

A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.

The present invention relates to a display module for visually impaired persons, a display system for visually impaired persons, and a control method therefor, and more specifically, provides a display module for visually impaired persons, a display system for visually impaired persons, and a control method therefor, the display module for visually impaired persons providing information such as Braille, figures and images by using a plurality of protrusions which moves up and down so that a visually impaired person may obtain information through hand sensation.

The present invention relates to a display module for visually impaired persons, a display system for visually impaired persons, and a control method therefor, and more specifically, provides a display module for visually impaired persons, a display system for visually impaired persons, and a control method therefor, the display module for visually impaired persons providing information such as Braille, figures and images by using a plurality of protrusions which moves up and down so that a visually impaired person may obtain information through hand sensation.

An electrostatic microgenerator having electret films which are arranged above one another in a double layer and each have a metal layer arranged on one side thereof as an electrode. The films are embedded in a hermetically sealed casing in a loosely wound manner. Applying pressure to a first desired pressure surface, which is provided on the outside parallel to the capacitor plates formed in this manner, makes it possible to generate an electrical voltage by changing the distance between the capacitor plates.

An electrostatic microgenerator having electret films which are arranged above one another in a double layer and each have a metal layer arranged on one side thereof as an electrode. The films are embedded in a hermetically sealed casing in a loosely wound manner. Applying pressure to a first desired pressure surface, which is provided on the outside parallel to the capacitor plates formed in this manner, makes it possible to generate an electrical voltage by changing the distance between the capacitor plates.

A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.

A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.