A switch device includes a substrate having at least one fixed contact and an inflow/outflow section provided with at least one through-hole, and a rubber contact to cover the substrate. The rubber contact includes at least one moving section disposed facing the respective at least one fixed contact, the moving section elastically deforming such that moving contacts corresponding to the respective fixed contacts are capable of contacting/separating, an in/out section disposed facing the inflow/outflow section and configured to form a space with the inflow/outflow section, a flow path section configured to form a flow path to connect the in/out section and the at least one moving section, and at least one chamber section having a space larger than a space occupying along representative length of the flow path section on a portion of the flow path section, and having strength such that a shape of the space is maintained.

The present disclosure discloses a keyboard including a base plate, membrane circuit board, a plurality of keys and a frame. The base plate includes a plurality of assembly areas and a first opening. The first opening is disposed between some said assembly areas. The membrane circuit board is disposed above the base plate. The membrane circuit board includes a second opening corresponding in position to the first opening, respectively. The frame is disposed above the base plate, and the membrane circuit board is disposed between the base plate and the frame. The frame blocks the first and second openings. The frame includes receiving portions corresponding in position to the assembly areas. The keys pass through the receiving portions and are fixed to the assembly areas of the base plate, respectively. Gaps between the frame and keys, the first and second openings jointly form an air current channel.

The present invention relates to an elastomeric keypad (1) having at least one key (3) comprising an elastomeric dome (41) defining a chamber (42) and provided inside with an activating means (43), an activation means (44) cooperating with said activation means (44), and at least one compensating channel (48) opening at said chamber (42) to enable for a flow of fluid from said chamber (42), while said elastomeric dome (41) collapses, and to said chamber (42), while said elastomeric dome (41) releases. In order to suppress the sound intensity of the pushup event, at least one of said compensating channels (48) comprises at least one valve arrangement (5) generating fluid restrictions while the fluid returns to said chamber (42). Preferably said valve arrangement (5) has a form of a Tesla Valve.

The present invention relates to an elastomeric keypad (1) having at least one key (3) comprising an elastomeric dome (41) defining a chamber (42) and provided inside with an activating means (43), an activation means (44) cooperating with said activation means (44), and at least one compensating channel (48) opening at said chamber (42) to enable for a flow of fluid from said chamber (42), while said elastomeric dome (41) collapses, and to said chamber (42), while said elastomeric dome (41) releases. In order to suppress the sound intensity of the pushup event, at least one of said compensating channels (48) comprises at least one valve arrangement (5) generating fluid restrictions while the fluid returns to said chamber (42). Preferably said valve arrangement (5) has a form of a Tesla Valve.

A keyboard is disclosed. The keyboard includes a keyboard housing and a switch assembly coupled to the keyboard housing. The switch assembly includes a switch body defining an interior volume, a collapsible dome positioned in the interior volume, an actuation member configured to actuate the collapsible dome in response to an actuation of the actuation member, and a cover coupled to the switch body. The cover retains the actuation member to the switch body. The keyboard also includes a flexible material coupled to the keyboard housing and extending over the actuation member.

A keyboard device includes a substrate, keycaps, and a membrane circuit board. The substrate has an upper surface including assembly areas, and the upper surface has an assembly member. The keycaps are disposed on the substrate and respectively corresponding to the assembly areas. The membrane circuit board is disposed between the substrate and the keycaps. The membrane circuit board includes an upper membrane layer having an upper layer hole, a lower membrane layer having a lower layer hole, and a spacing layer having a middle layer hole. The upper layer hole, the middle layer hole, and the lower layer hole communicate with each other. The assembly member protrudes upwardly from the lower layer hole, the middle layer hole, and the upper layer hole. The upper membrane layer includes a water-baffling edge between edges of the upper layer hole and the middle layer hole.

A keyboard device includes a substrate, keycaps, and a membrane circuit board. The substrate has an upper surface including assembly areas, and the upper surface has an assembly member. The keycaps are disposed on the substrate and respectively corresponding to the assembly areas. The membrane circuit board is disposed between the substrate and the keycaps. The membrane circuit board includes an upper membrane layer having an upper layer hole, a lower membrane layer having a lower layer hole, and a spacing layer having a middle layer hole. The upper layer hole, the middle layer hole, and the lower layer hole communicate with each other. The assembly member protrudes upwardly from the lower layer hole, the middle layer hole, and the upper layer hole. The upper membrane layer includes a water-baffling edge between edges of the upper layer hole and the middle layer hole.

Keyboards and other input devices are provided with at least one flexible layer that extends over or under the keycaps. The flexible layer spans interkey spaces and provides finger support and key definition as the user feels the top surface of the keycaps and flexible layer. The flexible layer therefore smooths the top surface of the keyboard, supports fingers during key travel, prevents ingress of contaminants, fluids, or debris into the keyboard, and provides a surface that can be used as a touch interface that coincides with the keyboard.

A pressing switch mechanism includes a housing, a board that is accommodated in the housing, a switch portion that is fixed to the board and generates a click feeling according to pressing a pressed portion in a direction approaching the board, and an operation plate which includes a bowl-shaped recessed surface that is recessed from a surface of the housing, of which an outer peripheral edge is supported by the housing, which is displaceably bent in the direction approaching the board, and in which a bottom wall portion of the recessed surface protruding inward the housing is in contact with the pressed portion.

A keyboard device has a base sheet, a membrane sheet disposed on the upper surface of the base sheet, a cover sheet disposed on the upper surface of the membrane sheet and supporting the membrane sheet between the cover sheet and the base sheet in a state of being movable in the in-plane direction, connection members connecting the base sheet and the cover sheet, a plurality of key tops vertically movably supported by a guide mechanism provided on the upper surface side of the cover sheet and bringing a movable contact and a fixed contact which are contacts of the membrane sheet into contact with each other or separating the contacts from each other by being depressed, and a frame member partitioning the key tops adjacent to each other by being depressed and having a lower surface to which the upper surface of the cover sheet is bonded and fixed.