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.

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.

A keyboard structure includes an elastomer, a flexible conductor and a conductive circuit board from top to bottom. The conductive circuit board is respectively provided with a circuit anode and a circuit cathode, the flexible conductor includes a flexible body and a conductive layer arranged on the flexible body. When pressing the elastomer, the circuit is switched on if the conductive layer on the flexible conductor is in contact with the circuit anode and the circuit cathode on the conductive circuit board. When loosening the elastomer, the circuit is switched off if the conductive layer on the flexible conductor is separated from the circuit anode and the circuit cathode on the conductive circuit board.

A keyboard structure includes an elastomer, a flexible conductor and a conductive circuit board from top to bottom. The conductive circuit board is respectively provided with a circuit anode and a circuit cathode, the flexible conductor includes a flexible body and a conductive layer arranged on the flexible body. When pressing the elastomer, the circuit is switched on if the conductive layer on the flexible conductor is in contact with the circuit anode and the circuit cathode on the conductive circuit board. When loosening the elastomer, the circuit is switched off if the conductive layer on the flexible conductor is separated from the circuit anode and the circuit cathode on the conductive circuit board.

Embodiments of negative pressure wound therapy systems and methods are disclosed. In one embodiment, an apparatus includes a housing, a negative pressure source, a canister, an antenna, and one or more controllers. The negative pressure source can provide negative pressure via a fluid flow path to a wound dressing. The canister can be positioned in the fluid flow path and collect fluid removed from the wound dressing. The antenna can be supported by the housing and wirelessly communicate with an electronic device. The antenna can be oriented in the housing to face downward toward the ground when the negative pressure source is providing negative pressure. The one or more controllers can activate and deactivate the negative pressure source and transmit first data to the electronic device using the antenna or receive second data from the electronic device using the antenna.

Embodiments of negative pressure wound therapy systems and methods are disclosed. In one embodiment, an apparatus includes a housing, a negative pressure source, a canister, an antenna, and one or more controllers. The negative pressure source can provide negative pressure via a fluid flow path to a wound dressing. The canister can be positioned in the fluid flow path and collect fluid removed from the wound dressing. The antenna can be supported by the housing and wirelessly communicate with an electronic device. The antenna can be oriented in the housing to face downward toward the ground when the negative pressure source is providing negative pressure. The one or more controllers can activate and deactivate the negative pressure source and transmit first data to the electronic device using the antenna or receive second data from the electronic device using the antenna.

A liftable keyboard for a portable electronic device is provided. The portable electronic device includes a top cover and a base. The liftable keyboard includes at least one key unit, a membrane switch circuit layer and a micro pump. Each key unit includes a keycap and an elastomer. When a sensing element within the base of the portable electronic device senses that the top cover is close to the base, the micro pump is enabled to perform a gas-extracting action. Consequently, the gas in the elastomeric chamber is extracted so that the elastomer is subjected to compressed deformation. The keycap is moved downwardly in response to the compressed deformation of the elastomer so as to reduce an altitude of the at least one key unit.

A liftable keyboard for a portable electronic device is provided. The portable electronic device includes a top cover and a base. The liftable keyboard includes at least one key unit, a membrane switch circuit layer and a micro pump. Each key unit includes a keycap and an elastomer. When a sensing element within the base of the portable electronic device senses that the top cover is close to the base, the micro pump is enabled to perform a gas-extracting action. Consequently, the gas in the elastomeric chamber is extracted so that the elastomer is subjected to compressed deformation. The keycap is moved downwardly in response to the compressed deformation of the elastomer so as to reduce an altitude of the at least one key unit.

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.