Abstract: Printed circuit board assemblies (PCBAs) are a fundamental component used in nearly all electronics. PCBAs provide electrical connections and mechanical support to electronic components and are generally made of copper layers laminated onto, though, and/or between one or more non-conductive substrate layers. Press-fit pin connections are often driven through the non-conductive substrate layers to connect power or ground across multiple conductive copper layers within a PCBA and/or connect electronic components on opposing sides of the substrate layer(s). Some new PCBA designs utilize fewer, but larger contact pins (e.g., power pins) in place of a greater number of smaller contact pins. With larger contact pin sizes, press-fit pin connections become more difficult to achieve with repeatable reliability in electrical connection without damaging surrounding features in a PCBA.

Abstract: A keyboard device includes a keycap, a connecting element and a base plate. The keycap includes a sliding-type hook. The connecting element includes a first frame and a second frame. A first connecting part is inserted into the sliding-type hook. The first connecting part includes a top side and a contact slant. The top side is located at a distal end of the first connecting part. The contact slant is arranged beside the top side. A junction line between the top side and the contact slant is perpendicular to a top surface of the first frame. Due to the structure of the contact slant, the contact area between the first connecting part and the sliding-type hook is reduced. Consequently, the amount of the assembling interference between the first connecting part and the sliding-type hook is reduced.

Abstract: A key structure includes a membrane switch circuit member, a rubbery elastomer, a housing, a triggering element, a metallic elastic element and a keycap. The keycap is disposed on the triggering element. The rubbery elastomer is disposed on the membrane switch circuit member. The housing is located over the rubbery elastomer. The triggering element is movable relative to the housing. The metallic elastic element is contacted with the triggering element. While the keycap is depressed, the triggering element is moved relative to the housing to press the metallic elastic element. While the metallic elastic element is pushed by the triggering element, the metallic elastic element is swung to collide with the triggering element. Consequently, a click sound is generated.

Abstract: A key structure includes a membrane switch circuit member, a rubbery elastomer, a housing, a triggering element, a metallic elastic element and a keycap. The keycap is disposed on the triggering element. The rubbery elastomer is disposed on the membrane switch circuit member. The housing is located over the rubbery elastomer. The triggering element is movable relative to the housing. The metallic elastic element is contacted with the triggering element. While the keycap is depressed, the triggering element is moved relative to the housing to press the metallic elastic element. While the metallic elastic element is pushed by the triggering element, the metallic elastic element is swung to collide with the triggering element. Consequently, a click sound is generated.