Abstract: A droplet proof keyboard for notebook computer comprises a base; a circuit membrane set on the base; a mounting plate on the circuit membrane set and having a through hole and a plurality of retaining parts for each keyswitch; a rubber cone set having a plurality of rubber cones, each rubber cone having a press part passing the through hole and touching the circuit membrane when the keyswitch is pressed; a plurality of key caps each corresponding to a keyswitch and having locking parts on lower surface thereof; an opaque plate arranged on the mounting plate and clamping the rubber cone; the opaque plate having an opening for each rubber cone and a plurality of slits through which lower ends of a switching lever passing; a switching lever set having a plurality of switching levers; each switching lever having a plurality of upper ends pivotally arranged on the locking parts of the keycap and a plurality of lower ends pivotally arranged on the retaining parts of the mounting plate.

Abstract: A flexible membrane circuit structure for keyboard comprises a substrate; a membrane circuit structure arranged on the substrate and comprising an upper membrane layer and a lower circuit layer, a plurality of movable keytops depressibly arranged on the substrate and each corresponding to one the conductive contact; at least one fixed keytop arranged on marginal location of the keyboard and being not depressible. Each membrane circuit layer has conductive contacts. The conductive contacts on the upper membrane layer has a predetermined separation with corresponding conductive contacts on the lower membrane layer. The upper membrane layer and the lower circuit layer is bridged by at least one folded plate such that the upper membrane layer electrically and mechanically connected with the lower circuit layer. The folded plate received within the fixed keytop to prevent the breaking of the folded plates.

Abstract: A balance device for key comprises two balance rods each arranged on the front side and rear side of the cap of the key. The two balance rods are arranged in a forficiform arrangement. The base plate of the key and the cap being provided with pivoting parts such that the balance rods being pivotably engaged within the pivoting part. Therefore, the key can be uniformly pressed, no matter where the pressing force for key is applied.

Abstract: The inventive keyswitch comprises a base plate, a conductive membrane, an elastic member, a key support mechanism and a key wherein the first support lever and the second lever of the key support mechanism are of the same structure and pivotably joined in a scissors-form. The molding die can be simplified, the assembling efficiency can be enhanced and the cost is reduced.

Abstract: A type of flexible component reinforcing mechanism, the upward extension of said flexible component forming a connector part, inside said flexible main unit is an activator body, the downward extension of the flexible component forms a base, characterized in a number of spaced reinforcing units that are located at the intersection part between the flexible main unit and the connector part; said configuration is designed to form better strength on the intersection part which is the most frequently broken or damaged part of the flexible component, to significantly reduce the occurrence of broken or damaged intersection part.

Abstract: A key switch assembly for use in a keyboard employing pressure sensitive electric switches disposed within a keyboard housing is provided. The key switch assembly includes a key switch socket member integrally formed on an upper panel of the keyboard housing to project axially upward therefrom. The key switch socket member includes an inner wall portion defining a receiving bore which has formed thereon an axially extended guiding slot spaced from a pair of appropriately spaced and radially protruding guiding projections which are provided with upwardly exposed beveled surfaces. The key switch assembly also includes a key top member displaceably coupled to the key switch socket member which is formed with an axially extended key stem.

Abstract: A key switch for notebook computers, including a bottom frame having two pairs of upright lugs spaced near two opposite sides, a membrane circuit mounted on the bottom frame, a key cap, a rubber cone supported on the membrane circuit and compressed by the key cap to trigger the membrane circuit in producing an electrical signal, a first link having an annular base and two pairs of springy extension rods respectively extended from the periphery of the annular base at two opposite sides and respectively coupled to the key cap and the bottom frame diagonally, and a substantially U-shaped second link pivotably connected to the annular base of the first link at two opposite sides and coupled between the key cap and the bottom frame diagonally for turning relative to the first link to guide the movement of the key cap vertically.

Abstract: A scissors-type key switch comprising a key top, a scissors-type supporting bracket, a base member, an elastic actuator, a membrane switch, and a bottom plate is provided. The membrane switch, the elastic actuator, and the base are disposed above the bottom plate. The scissors-type supporting brackets are pivotally supported and received on the base by the pivotally engagement between the pin shaft of the supporting brackets and the connecting holes of the base. The key top is also pivotally connected to the scissors-type supporting brackets by the connecting slots of the key top and the pin shafts of the supporting bracket. This scissors-type key switch features a simplified structure resulted from reduced number of components and durable operation wherein the key top can readily move down and up without rolling thereof. The manufacturing cost is advantageously reduced while the throughput is considerably increased.

Abstract: A key switch for notebook computers, including a bottom frame having two pairs of upright lugs spaced near two opposite sides, a membrane circuit mounted on the bottom frame, a key cap, a rubber cone supported on the membrane circuit and compressed by the key cap to trigger the membrane circuit in producing an electrical signal, a first link having one end pivoted to the key cap and an opposite end coupled to one pair of upright lugs of the bottom frame by a slip joint, and a second link pivotably coupled to the first link in its middle and having one end pivoted to the key cap and an opposite end pivoted to the other pair of upright lugs of the bottom frame.

Abstract: A rubber cone layer for use in a computer keyboard, having fine grains distributed over the top and bottom sides thereof to prevent sticking to the membrane circuit of the computer keyboard, and a plurality of rubber cones raised from the top side corresponding to the key switches of the computer keyboard for compression by the key switches to trigger respective contact points at the membrane circuit, each of the rubber cones having a downward plunger terminating in a conductive element and spaced above one contact point of the membrane circuit.

Abstract: A key switch for a keyboard frame with a circuit board underneath includes a square-section key base, a key body sliding up and down in the key base, a key cap pressed into the key body, and a rubber cone between the key body and the circuit board. The cap includes a plunger with a downward-opening inner hole, whose lower rim contacts the upper side of the cone. The key base has four walls forming a square tube extending up from the keyboard frame surface. At the upper end of the walls are flanges extending in from the walls; each flange has a central flange notch, and between each pair of flanges is a 45-degree bevel extending across each of the base corners. The key body includes four stub rods that slide within the corners of the key base; each of the stub rods has an upper stop surface that limits the upward travel of the key body by abutting against the underside of a respective bevel.

Abstract: A keyboard frame assembly mounting hardware includes a base frame having a plurality of female fastening device at the top, a plurality of oblong guide holes and a locating hole spaced along the longitudinal center line thereof, each female fastening device having a bridge strip bridged over a square hole; and a key switch supporting frame having a plurality of male fastening devices at the bottom respectively fastened to the female fastening devices, and a plurality of locating stub rods respectively inserted into the oblong guide holes and said locating hole, each male fastening device having a hook hooked on the bridge strip of the respective female fastening device.