The electronic apparatus has: a flat-shaped main body chassis provided with a motherboard; a switch provided at an end portion of the motherboard; a button for pressing an actuator of the switch; a restriction section that restricts the button from rotating around a contact portion when the button presses the actuator; and a button opening formed in a side wall of the main body chassis at a position shifted to a higher level than the switch. The button includes: an operation section exposed through the button opening; an arm portion that extends to a position facing the actuator; and a fin piece that protrudes. The restriction section is provided in such a manner as to face the fin piece at a position vertically shifted to a lower level then the fin piece.

The electronic apparatus has: a flat-shaped main body chassis provided with a motherboard; a switch provided at an end portion of the motherboard; a button for pressing an actuator of the switch; a restriction section that restricts the button from rotating around a contact portion when the button presses the actuator; and a button opening formed in a side wall of the main body chassis at a position shifted to a higher level than the switch. The button includes: an operation section exposed through the button opening; an arm portion that extends to a position facing the actuator; and a fin piece that protrudes. The restriction section is provided in such a manner as to face the fin piece at a position vertically shifted to a lower level then the fin piece.

A speed regulating hand brake mechanism and method for speed regulation of the speed regulating hand brake mechanism is disclosed. The mechanism includes: a housing, wherein an installation cavity is defined inside the housing; a speed regulating button is hinged to the side wall of the housing; an installation cavity is internally provided with the driving part hinged to the speed regulating button; the rack is hinged to the driving part and can slide along the inner wall of the installation cavity in a horizontal direction after receiving the pressing force transmitted from the speed regulating button; the encoder is fixed on a first fixing plate in the installation cavity, the rack drives a gear arranged at the top of the encoder to rotate, and changes the code value output by the encoder; the elastic end of the return piece is located inside the speed regulating button.

A keyswitch structure includes a base, a cap disposed corresponding to the base, a restoring member disposed between the base and the cap, and a tactile adjustment unit. The cap has a cam portion movable relative to the base. The restoring member is configured to provide a restoring force to enable the cam portion to move away from the base. The tactile adjustment unit is disposed corresponding to the cam portion and includes a holder and a tactile feedback member mounted on the holder. The holder is movable relative to the base to change a position of the tactile feedback member relative to the cam portion, so as to change a pressing force required for the cam portion to move toward the base.

A keyswitch structure includes a base, a cap disposed corresponding to the base, a restoring member disposed between the base and the cap, and a tactile adjustment unit. The cap has a cam portion movable relative to the base. The restoring member is configured to provide a restoring force to enable the cam portion to move away from the base. The tactile adjustment unit is disposed corresponding to the cam portion and includes a holder and a tactile feedback member mounted on the holder. The holder is movable relative to the base to change a position of the tactile feedback member relative to the cam portion, so as to change a pressing force required for the cam portion to move toward the base.

A keyswitch assembly includes a switch module, a support mechanism, a blocking mechanism, an enhancing light source, and a backlight source. The switch module includes a substrate, a signal generator, and a signal sensor. The signal generator generates a sensing signal. The signal sensor receives the sensing signal to obtain a sensing strength. The support mechanism is disposed on the substrate. The blocking mechanism is disposed on the substrate and has a light-permeable portion. A portion of the blocking mechanism inserts into or escapes from a gap between the signal generator and the signal sensor. The backlight source is disposed on the substrate and located outside the vertical projection of the blocking mechanism on the substrate. The enhancing light source is disposed on the substrate and located within the vertical projection of the blocking mechanism on the substrate and corresponds to the light-permeable portion.

A keyswitch assembly includes a switch module, a support mechanism, a blocking mechanism, an enhancing light source, and a backlight source. The switch module includes a substrate, a signal generator, and a signal sensor. The signal generator generates a sensing signal. The signal sensor receives the sensing signal to obtain a sensing strength. The support mechanism is disposed on the substrate. The blocking mechanism is disposed on the substrate and has a light-permeable portion. A portion of the blocking mechanism inserts into or escapes from a gap between the signal generator and the signal sensor. The backlight source is disposed on the substrate and located outside the vertical projection of the blocking mechanism on the substrate. The enhancing light source is disposed on the substrate and located within the vertical projection of the blocking mechanism on the substrate and corresponds to the light-permeable portion.

The invention describes a control and signaling device which comprises the following: a cylindrical main body with two open ends, an operating element which is designed for insertion into one of the open ends of the main body and has a switching part that is movable relative to the main body, and a multipartite insert element which is designed for insertion into the main body for bridging at least one portion of a switching path from the switching part to a contact element arranged at the other of the open ends and has an elastic element which elastically supports a portion , provided for operating the contact element, of the insert element in such a way that a pressure force of the insert element onto the contact element is limited to a prespecified force range.

The invention describes a control and signaling device which comprises the following: a cylindrical main body with two open ends, an operating element which is designed for insertion into one of the open ends of the main body and has a switching part that is movable relative to the main body, and a multipartite insert element which is designed for insertion into the main body for bridging at least one portion of a switching path from the switching part to a contact element arranged at the other of the open ends and has an elastic element which elastically supports a portion , provided for operating the contact element, of the insert element in such a way that a pressure force of the insert element onto the contact element is limited to a prespecified force range.

A keyboard-key biasing device 10 having a resiliently-flexible body element 12, a resiliently-flexible elongate first biasing member 14 which has a first contact area 30 and a resiliently-flexible elongate second biasing member 16 which has a second contact area 34. The first and second contact areas 30, 34 being at different distances from the body element 12 so that the biasing device 10 is usable in a plurality of orientations to suit a plurality of keyboard configurations