In a push button portion of a button member, a first supported portion is supported by a push-in portion of a push-in type switch. A second supported portion is supported in a second area by an electronic board. The second area is adjacent to one side of the electronic component. The push-in type switch is present in a first area which is adjacent to another side of the electronic component that is opposite to the one side. An elastic portion connects a portion including the second supported portion to a portion including the push button portion and the first supported portion. A plurality of guided portions are restricted by a plurality of guide projection portions projecting from an exterior member, from being displaced in a direction intersecting a depth direction. The plurality of guide projection portions are provided in the first area and the second area.

Methods for assembling low-profile, singulated keyboards by prefabricating key assemblies onto a chassis strip that is divided into individual key assemblies only after the substrate is affixed to a feature plate of keyboard. For example, a row of key assemblies is fabricated onto a chassis strip. The row corresponds to a partial or complete row of keys of the keyboard. The chassis strip is thereafter affixed to a feature plate in a specific location, thereby aligning each prefabricated key assembly to a precise location on the feature plate. While connected, each prefabricated key assembly is independently affixed to the feature plate. Thereafter, interconnecting portions of the chassis strip between the prefabricated key assemblies are removed, thereby singulating each key assembly.

A keyboard, an electronic device and an assembly method of the keyboard are provided. The electronic device includes a display, the keyboard and a host, wherein the display and the keyboard are electrically connected with the host. The keyboard includes a thin film circuit (TFC) board and multiple buttons. The TFC board has multiple membrane switches with the buttons correspond to the membrane switches, and each of the buttons includes a keycap and a scissor foot. The keycap is used to be pressed to make the corresponding switch being turned on. The keycap includes a cap body and a resetting member, wherein the cap body and the resetting member are formed as an integral, and the scissor feet are connected between the keycap and the TFC board.

An assembly of mechanical components includes a solder joint between two metal components. A mounted component is retained on one side of a support structure by a solder joint on the other side of the support structure between a retainer and a connector that is fast with the mounted component and extends through the support structure. The retainer is of sheet metal construction, so that a height of the solder joint is no more than the thickness of the retainer, thus providing a low-profile joint. The assembly may be in the form of a movable push button for control of an electronic device.

An activation component testing apparatus comprising an outer sleeve, an inner sleeve, a plunger, a number of bearings, and a compression spring. The outer sleeve forms an interior chamber having opposing first and second openings. The plunger, bearings, inner sleeve, and compression spring are disposed in the central cavity. The plunger includes a number of bearing recesses that engage the bearings such that the plunger is configured to transfer a compressive force applied to the activation component through the inner sleeve and compression spring to a load cell via the bearings when the plunger is in an extended position and urge the bearings out of engagement with the bearing recesses when the plunger is in a maximum force position such that the plunger cannot transfer additional compressive force to the load cell when the plunger is moved beyond the maximum force position.

An overheating destructive switch, comprising: a first conductive element, a second conductive element, a movable conductive element, an overheating destructive element, an operating component, and a second elastic element. The movable conductive element connects the first conductive element and the second conductive element. A first elastic element and the second elastic element act on an operating element. The first elastic element is compressed and has a first elastic force, and the second elastic element has a second elastic force. The first elastic force is greater than the second elastic force under in a normal state. When the overheating destructive element is destroyed due to overheating, the first elastic force is reduced or lost, such that the second elastic force becomes greater than the first elastic force. The movable conductive element is consequently disconnected from the first conductive element and the second conductive element, thus achieving protection against overheating.

An overheating destructive switch, comprising: a first conductive element, a second conductive element, a movable conductive element, an overheating destructive element, an operating component, and a second elastic element. The movable conductive element connects the first conductive element and the second conductive element. A first elastic element and the second elastic element act on an operating element. The first elastic element is compressed and has a first elastic force, and the second elastic element has a second elastic force. The first elastic force is greater than the second elastic force under in a normal state. When the overheating destructive element is destroyed due to overheating, the first elastic force is reduced or lost, such that the second elastic force becomes greater than the first elastic force. The movable conductive element is consequently disconnected from the first conductive element and the second conductive element, thus achieving protection against overheating.

A heat destructive disconnecting switch comprises a first conductive member, a second conductive member, a movable conductive member, an overheating destructive member, an operating component, and a second elastic member. The movable conductive member conducts electricity to the first conductive member and the second conductive member. The overheating destructive member is formed as an integral body on a limiting member, and a first elastic member is compressed to between a contact member and the overheating destructive member, thereby providing the first elastic member with a first elastic force. The second elastic member is provided with a second elastic force. When the overheating destructive member is destructed due to overheating, the first elastic force is smaller than the second elastic force, causing the movable conductive member to disconnect the first conductive member from the second conductive member to achieve a protective effect from overheating.

A heat destructive disconnecting switch comprises a first conductive member, a second conductive member, a movable conductive member, an overheating destructive member, an operating component, and a second elastic member. The movable conductive member conducts electricity to the first conductive member and the second conductive member. The overheating destructive member is formed as an integral body on a limiting member, and a first elastic member is compressed to between a contact member and the overheating destructive member, thereby providing the first elastic member with a first elastic force. The second elastic member is provided with a second elastic force. When the overheating destructive member is destructed due to overheating, the first elastic force is smaller than the second elastic force, causing the movable conductive member to disconnect the first conductive member from the second conductive member to achieve a protective effect from overheating.

A heat destructive disconnecting switch, comprises a first conductive member, a second conductive member, a movable conductive member, an overheating destructive member, an operating component, and a second elastic member. The movable conductive member conducts electricity to the first conductive member and the second conductive member. A first elastic member and the second elastic member act on an operating member. The first elastic member is compressed and provided with a first elastic force, and the second elastic member is provided with a second elastic force. When the overheating destructive member is destructed due to overheating, the first elastic force is diminished or vanishes, causing the second elastic force to be larger than the first elastic force. Consequently, the movable conductive member disconnects the current conducting state between the first conductive member and the second conductive member, thereby achieving a protective effect from overheating.