A switch device includes a substrate provided with at least one first contact and including at least one through hole, and a contact rubber, being an elastic sheet covering the substrate, provided with a dome-shaped cavity configured to make a second contact portion including a second contact corresponding to the first contact elastically deformable to be capable of contacting to and separating from the first contact, a vent cavity portion provided corresponding to the through hole, and an air groove communicating with the cavity and the vent cavity portion between the substrate and the elastic sheet. The through hole is an independent through hole being not electrically connected to a circuit of the substrate.

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

The present disclosure provides a membrane circuit board of keyboard and a keyboard structure. The membrane circuit board of keyboard includes a first film, a first air channel, a second film, a second air channel, and a third film. The first film includes a first circuit pattern. The first air channel is disposed on the first film. The second film is disposed on the first air channel, and the second film includes an air hole. The second air channel is disposed on the second film, and the second air channel is in fluid communication with the air hole and the first air channel. The third film is disposed on the second air channel, and the third film includes a second circuit pattern.

A switch device includes a substrate provided with at least one first contact and including at least one through hole, and a contact rubber, being an elastic sheet covering the substrate, provided with a dome-shaped cavity configured to make a second contact portion including a second contact corresponding to the first contact elastically deformable to be capable of contacting to and separating from the first contact, a vent cavity portion provided corresponding to the through hole, and an air groove communicating with the cavity and the vent cavity portion between the substrate and the elastic sheet. The air groove includes a non-linear path.

An instrument panel that reduces dust entering the inside of a switch and improves aesthetics of the instrument panel. An instrument panel includes: an outlet portion configured to blow out conditioned air to an interior of a vehicle; a switch attachment portion at which a switch member is disposed; a cover member configured to cover a part of the outlet portion and the switch attachment portion and distribute air from the outlet portion to the interior of the vehicle; and an exhaust hole covered with the cover member and provided at a portion of the switch attachment portion.

An instrument panel that reduces dust entering the inside of a switch and improves aesthetics of the instrument panel. An instrument panel includes: an outlet portion configured to blow out conditioned air to an interior of a vehicle; a switch attachment portion at which a switch member is disposed; a cover member configured to cover a part of the outlet portion and the switch attachment portion and distribute air from the outlet portion to the interior of the vehicle; and an exhaust hole covered with the cover member and provided at a portion of the switch attachment portion.

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 switch device includes a substrate provided with at least one first contact and including at least one through hole, and a contact rubber, being an elastic sheet covering the substrate, provided with a dome-shaped cavity configured to make a second contact portion including a second contact corresponding to the first contact elastically deformable to be capable of contacting to and separating from the first contact, a vent cavity portion provided corresponding to the through hole, and an air groove communicating with the cavity and the vent cavity portion between the substrate and the elastic sheet. The air groove includes a non-linear path.

A switch device includes a substrate provided with at least one first contact and including at least one through hole, and a contact rubber, being an elastic sheet covering the substrate, provided with a dome-shaped cavity configured to make a second contact portion including a second contact corresponding to the first contact elastically deformable to be capable of contacting to and separating from the first contact, a vent cavity portion provided corresponding to the through hole, and an air groove communicating with the cavity and the vent cavity portion between the substrate and the elastic sheet. The through hole is an independent through hole being not electrically connected to a circuit of the substrate.

In a push-button switch device for a vehicle including a case fixed to a vehicle body or a lid openably and closably mounted on the vehicle body, a push-button that forms a housing chamber in cooperation with the case and supported on the case configured for a pushing operation, and a switch housed in and fixed to the housing chamber for changing a switching mode thereof in response to a pushing operation of the push-button, a through passage is formed in the case, the through passage having one end part thereof communicating with the housing chamber, and an air vent hole is provided in the case, the air vent hole providing communication between the other end part of the through passage and the outer panel. Such configuration prevents water from entering a housing chamber thereby avoiding deterioration of the push-button, and enabling the housing chamber to breath.