The disclosure provides a keyboard including a bottom plate, a key unit and a shielding layer. The bottom plate includes a through hole. The key unit is disposed on the bottom plate. The shielding layer covering a portion of the bottom plate includes a main part and an extension part extending from the main part toward the through hole. The shielding layer is provided with a black surface, and an orthographic projection of the key unit on the shielding layer overlaps the black surface.

The disclosure provides a keyboard including a bottom plate, a key unit and a shielding layer. The bottom plate includes a through hole. The key unit is disposed on the bottom plate. The shielding layer covering a portion of the bottom plate includes a main part and an extension part extending from the main part toward the through hole. The shielding layer is provided with a black surface, and an orthographic projection of the key unit on the shielding layer overlaps the black surface.

A switch device includes an operating knob on which a tilting operation is performed, a detected portion that tilts with the tilting operation of the operating knob, a detection portion that detects movement of the detected portion, and a substrate on which the detection portion is arranged. The detection portion is aligned in an in-plane direction of the substrate and performs a switching operation upon detection of movement of the detected portion in the in-plane direction.

A switch device includes an operating knob on which a tilting operation is performed, a detected portion that tilts with the tilting operation of the operating knob, a detection portion that detects movement of the detected portion, and a substrate on which the detection portion is arranged. The detection portion is aligned in an in-plane direction of the substrate and performs a switching operation upon detection of movement of the detected portion in the in-plane direction.

Systems, methods and non-transitory computer-readable mediums are provided for determining data center resource requirements, such as cooling and power requirements, and for monitoring performance of data center resource systems, such as cooling and power systems, in data centers. At least one aspect provides a system and method that enables a data center operator to determine available data center resources, such as power and cooling, at specific areas and enclosures in a data center to assist in locating new equipment in the data center.

Systems, methods and non-transitory computer-readable mediums are provided for determining data center resource requirements, such as cooling and power requirements, and for monitoring performance of data center resource systems, such as cooling and power systems, in data centers. At least one aspect provides a system and method that enables a data center operator to determine available data center resources, such as power and cooling, at specific areas and enclosures in a data center to assist in locating new equipment in the data center.

An operating device is provided for a human-powered vehicle. The operating device basically includes a base, a first electric switch, a second electric switch, a first operating member and a second operating member. The first operating member is movable with respect to the base to activate the first electric switch as the first operating member moves from a non-operated position to an intermediate operating position, and then activate the second electric switch as the first operating member moves from the intermediate operating position to an additional operating position. The second operating member is movable with respect to the base to activate the second electric switch as the second operating member moves from a non-operated position to an intermediate operating position, and then activate the first electric switch as the second operating member moves from the intermediate operating position of the second operating member to an additional operating position.

An operating device is provided for a human-powered vehicle. The operating device basically includes a base, a first electric switch, a second electric switch, a first operating member and a second operating member. The first operating member is movable with respect to the base to activate the first electric switch as the first operating member moves from a non-operated position to an intermediate operating position, and then activate the second electric switch as the first operating member moves from the intermediate operating position to an additional operating position. The second operating member is movable with respect to the base to activate the second electric switch as the second operating member moves from a non-operated position to an intermediate operating position, and then activate the first electric switch as the second operating member moves from the intermediate operating position of the second operating member to an additional operating position.

A key arrangement includes an activation element, a switch, a mechanical counterforce generating device, and a permanent magnet arrangement. The switch has at least a first state and a second state. The activation element has a basic state and an activation state and is configured to, in case of activation by a user, permit a movement from the basic state into the activation state, and in case of the movement into the activation state to permit a change in the state of the switch. The mechanical counterforce generating device is configured to generate, in case of an activation of the activation element, a first counterforce at least in certain areas. The permanent magnet arrangement is configured to generate, in case of activation of the activation element, a second counterforce at least in certain areas.

A button structure includes a first component, a second component, and a pressing element mounted on the second component. The first component has a first base portion. The first base portion protrudes outward to form at least one first extending portion. The at least one first extending portion protrudes inward to form a limiting portion. The second component has a second base portion. The second base portion protrudes rearward to form at least one second extending portion. The at least one first extending portion and the at least one second extending portion are connected by a pivoting assembly. The at least one second extending portion protrudes rearward to form a blocking portion. When the blocking portion is pivoted on the first component, the blocking portion is alternatively located to a bottom of the limiting portion and a top of the limiting portion.