Producing multiple independent fields from many phased acoustic transducers represents a difficult computational problem. By first dividing up each field to its own group of transducers and then treating each group as an element with adjustable phase, one can minimize the field-to-field interference through a power iteration solution. These solutions can be further refined by including tracking information from users in the space and how they shadow or reflect the acoustic fields.

A push switch including a pressing member, a movable contact, an interposed member, a first fixed contact, and a second fixed contact is provided. The pressing member includes a pressing portion configured to be pressed, and includes an elastically deformable peripheral wall portion having a lower end portion and extending downward and outward from the outer periphery of the pressing portion. The movable contact has a dome shape and is disposed below the pressing member. The interposed member is disposed between the pressing member and the movable contact, and is configured to press the movable contact by receiving and being pressed by the lower end portion of the peripheral wall portion of the pressing member. The lower end portion of the peripheral wall portion of the pressing member presses the interposed member while the peripheral wall portion is subjected to elastic deformation in response to the pressing portion being pressed.

A push switch including a pressing member, a movable contact, an interposed member, a first fixed contact, and a second fixed contact is provided. The pressing member includes a pressing portion configured to be pressed, and includes an elastically deformable peripheral wall portion having a lower end portion and extending downward and outward from the outer periphery of the pressing portion. The movable contact has a dome shape and is disposed below the pressing member. The interposed member is disposed between the pressing member and the movable contact, and is configured to press the movable contact by receiving and being pressed by the lower end portion of the peripheral wall portion of the pressing member. The lower end portion of the peripheral wall portion of the pressing member presses the interposed member while the peripheral wall portion is subjected to elastic deformation in response to the pressing portion being pressed.

A keyboard device includes a substrate, a keycap, a first connection member, and a first elastic arm structure. The substrate has a top surface, and the top surface has an assembling region. The keycap is disposed above the assembling region, and the keycap has a bottom surface facing the assembling region. The first connection member is connected between the keycap and the assembling region, the first connection member includes a first assembly side and a second assembly side opposite to the first assembly side, the first assembly side is pivotally connected to the bottom surface of the keycap, and the second assembly side is pivotally connected to the substrate. The first elastic arm structure includes a connection end and a free end opposite to the connection end, the connection end is connected to the first assembly side, and the free end abuts against the bottom surface of the keycap.

Producing multiple independent fields from many phased acoustic transducers represents a difficult computational problem. By first dividing up each field to its own group of transducers and then treating each group as an element with adjustable phase, one can minimize the field-to-field interference through a power iteration solution. These solutions can be further refined by including tracking information from users in the space and how they shadow or reflect the acoustic fields.

A keyboard with a sound-generating funtion in an electronic device includes a base board, a circuit layer, a button layer, and a sound production layer. The button layer includes a first supporting board and buttons on the first supporting board. The sound production layer includes a second supporting board and sound production members on the supporting board. The sound production layer is sandwiched between the base board and the button layer, each sound production member can be contacted by a predetermined buttons. When such button is pressed, a corresponding sound production member is pressed by the button and produces sound. The electronic device is further disclosed.

A pedestrian pushbutton for activating a traffic device. A plunger mounted in a housing impinges on a piezo element when pressed. O-rings between the bolts that secure the plunger to the housing and the housing bias the plunger inwardly. A foam disk under the piezo element, or a resilient stem bumper on the back of the plunger, or both, bias the plunger outwardly with a force about equal to the inwardly biasing force of the O-rings on the bolts. Thus, the opposing resilient members maintain the plunger at neutral buoyancy when at rest. An O-ring disposed between the edge of the plunger and the opening in the housing centers the plunger. The pushbutton may include light and sound assemblies to confirm to the pedestrian visually and audibly that the pushbutton has been engaged. The sound chamber may be tuned based on the Helmholtz formula to achieve an optimum frequency.

A keyboard device includes a substrate, a keycap, a first connection member, and a first elastic arm structure. The substrate has a top surface, and the top surface has an assembling region. The keycap is disposed above the assembling region, and the keycap has a bottom surface facing the assembling region. The first connection member is connected between the keycap and the assembling region, the first connection member includes a first assembly side and a second assembly side opposite to the first assembly side, the first assembly side is pivotally connected to the bottom surface of the keycap, and the second assembly side is pivotally connected to the substrate. The first elastic arm structure includes a connection end and a free end opposite to the connection end, the connection end is connected to the first assembly side, and the free end abuts against the bottom surface of the keycap.