A button switch connected to a cap and includes a base having a pillar, a flexible acoustic member having fixing and flexible rods, a sleeve, an upward-force-applying member abutting against the sleeve and the base, a resilient arm, and a cover disposed on the base. The sleeve rotatably jackets the pillar, passes through the cover to be connected to the cap, and has first and second convex portions, first and second concave portions, and a protruding edge located between the second convex portion and the second concave portion. The resilient arm selectively abuts against a first or second position on the first convex portion. When the resilient arm abuts against the first position and the protruding edge is located above the flexible rod, the flexible rod crosses the protruding edge and then collides with the cover to make a sound when the sleeve receives an external force to move downward.

A button switch connected to a cap and includes a base having a pillar, a flexible acoustic member having fixing and flexible rods, a sleeve, an upward-force-applying member abutting against the sleeve and the base, a resilient arm, and a cover disposed on the base. The sleeve rotatably jackets the pillar, passes through the cover to be connected to the cap, and has first and second convex portions, first and second concave portions, and a protruding edge located between the second convex portion and the second concave portion. The resilient arm selectively abuts against a first or second position on the first convex portion. When the resilient arm abuts against the first position and the protruding edge is located above the flexible rod, the flexible rod crosses the protruding edge and then collides with the cover to make a sound when the sleeve receives an external force to move downward.

A push-button with a receptacle and a cover plate, an actuating button actuatable in translation between two positions, a rest position and a pushed-in position, the cover plate being arranged at the periphery of the actuating button, a device for guiding the actuating button in translation between the two positions, and a return device for returning the actuating button from the pushed-in position toward the rest position. The guiding device include at least a pin including a bent rod shaped to have a first part pivotally mounted on a fastening unit of the actuating button and a second part pivotally mounted on a fastening unit of the cover plate, and the return device are designed to act on the pin by mechanical or magnetic effect.

A light emitting device includes at least two light sources arranged side by side in a first direction and a light guide placed opposed to the light sources. As viewed in an opposing direction of the light sources and the light guide, a light receiving surface of the light guide overlaps light emitting surfaces of the light sources. As viewed in the opposing direction, the light receiving surface has depressions in a region opposed to the light emitting surfaces of the light sources. The depressions are arranged side by side in an arrangement direction of the light sources in a one-to-one correspondence with the light sources.

A light emitting device includes at least two light sources arranged side by side in a first direction and a light guide placed opposed to the light sources. As viewed in an opposing direction of the light sources and the light guide, a light receiving surface of the light guide overlaps light emitting surfaces of the light sources. As viewed in the opposing direction, the light receiving surface has depressions in a region opposed to the light emitting surfaces of the light sources. The depressions are arranged side by side in an arrangement direction of the light sources in a one-to-one correspondence with the light sources.

A keyswitch structure includes a base, a keycap, a first support, a second support, and a connection structure. The keycap moves up and down relative to the base through the first support and the second support. The connection structure is disposed on the base and includes a vertical-motion limiting part and a horizontal-motion limiting part. The first support includes a rod-shaped connection portion and is connected to the connection structure through the rod-shaped connection portion. The vertical-motion limiting part prevents the rod-shaped connection portion from vertically moving. The horizontal-motion limiting part limits the horizontal movement of the rod-shaped connection portion. The vertical-motion limiting part and the horizontal-motion limiting part are separated in the rotation axis of the rod-shaped connection portion.

An electrical device such as, for example, a battery-powered electrical switch is disclosed. The battery-powered wireless switch includes one or more mechanisms arranged and configured to provide simplified access for servicing (e.g., replacing) the batteries located within the wireless switch. In one embodiment, the wireless switch is arranged and configured so that the batteries may be accessed by reconfiguring the wireless switch from a first closed position to a second opened position to access the batteries. Thus arranged, removal of the wireless switch from a wall-box or a surface of a wall is not required, the user may only need to remove the wall-plate in order to reconfigure the wireless switch. In one embodiment, at least a portion of the wireless switch is pivoted from the first position to the second position to provide access to the batteries.

An electrical device such as, for example, a battery-powered electrical switch is disclosed. The battery-powered wireless switch includes one or more mechanisms arranged and configured to provide simplified access for servicing (e.g., replacing) the batteries located within the wireless switch. In one embodiment, the wireless switch is arranged and configured so that the batteries may be accessed by reconfiguring the wireless switch from a first closed position to a second opened position to access the batteries. Thus arranged, removal of the wireless switch from a wall-box or a surface of a wall is not required, the user may only need to remove the wall-plate in order to reconfigure the wireless switch. In one embodiment, at least a portion of the wireless switch is pivoted from the first position to the second position to provide access to the batteries.

A keyboard and a key structure capable of displaying instant image thereof are provided. The key structure includes a display unit, a circuit membrane, an elastic member, a key seat, a first supporting frame, a second supporting frame, and a translucent keycap. The first supporting frame has two first arms and two axle portions. The ends of the first arms are slidably disposed on an accommodation portion of the key seat. The second supporting frame has two second arms and two linking holes. The ends of the second arms are pivotally connected to the accommodation portion. The linking hole is elongated-shaped. When the translucent keycap is not pressed, the axle portion abuts against one hole-end of the linking hole. When the translucent keycap is pressed, the axle portion abuts against another one hole-end of the linking hole.

The control panel and display of a cart-borne ultrasound system are support by a lift which can be controlled to allow the control panel and display to be raised, lowered, and rotated. The lift has a first pivot elbow mounted to the ultrasound system cart and a second pivot elbow on which the control panel and display are mounted. A four-bar linkage is coupled between the pivot elbows which enables to control panel and display to be raised and lowered while maintaining the inclination of the control panel. The pivot elbows allow the control panel and display to be turned and rotated. A pair of hydraulic struts are mounted to the four-bar linkage to support the weight of the control panel and display. When a control button on the handle of the control panel is depressed the control panel and display can be freely raised, lowered and rotated. When the control button is released the pivot elbows and four-bar linkages are locked in their current positions.