Abstract: A pointing stick used to control the cursor's movement on a display device is provided. The pointing stick includes a substrate and a stick. The stick has one end connected to the substrate and a portion of the stick is in form of cylinder. A plurality of sensors are disposed over the circular surface of the cylinder of the stick.

Abstract: A key device for a computer keyboard has a rigid printed circuit board, a flexible printed circuit board, and a key structure. The rigid printed circuit board has two adjacent but unconnected conductive ends electrically connected to two wires respectively. The flexible printed circuit board, fixed over the rigid printed circuit board, has a conductive segment installed above the two conductive ends, and an isolation layer installed around the conductive segment to form a gap between the conductive segment and the two conductive ends. The key structure is moveably fixed on the flexible printed circuit board in an up and down manner. When the key structure is pushed downward, the bottom of the key structure will touch the conductive segment of the flexible printed circuit board, and the conductive segment will touch the two conductive ends of the rigid printed circuit board to electrically connect the two conductive ends and the two wires.

Abstract: A thin film circuit includes a thin film switching circuit with an upper circuit layer including at least one upper joint, and a lower circuit layer including at least one lower joint corresponding to the upper joint. The lower circuit layer is set under the upper layer, and an air-filled space is disposed between the upper joint and the lower joint. The thin film switching circuit further includes at least one first air conduit set between the upper circuit layer and the lower circuit layer and connected to the air-filled space, and at least one bus structure connected to the thin film switching circuit and extending out of the thin film switching circuit to transmit electrical signals of the thin film switching circuit. The bus structure includes at least one second air conduit.

Abstract: The present invention provides a pointing stick device for use with a computer. The pointing stick device has a base plate having an aperture, a stick having a lower portion, at least one strain gauge attached on the lower portion, and a binding compound filling the space between the lower portion of the stick and the aperture of the base plate. The lower portion of the stick is tapered. The binding compound covers the strain gauges and fixes the lower portion of the stick vertically in the aperture of the base plate. When the stick is vertically depressed, the strain gauge installed on the lower portion of the stick senses the vertical downward pressure from reaction forces transmitted through the binding compound and generates the corresponding sensing signals.

Abstract: The present invention relates to a pointing stick device. The pointing stick device comprises a base plate, a stick, a cap and a base stand. The bottom end of the stick is vertically mounted in a hole in the base plate, and a plurality of strain gauges are installed around the middle portion of the stick to sense pressure and generate corresponding sensing signals. The cap has a cone-shaped mouth to contain the top end of the stick and the middle portion of the stick. The base stand, of a cone shape to match the mouth of the cap, covers the middle portion of the stick. A plurality of strain gauges extend into the middle portion of the stick and are covered by the base stand so that the top ends of the strain gauges sense the pressure coming form cap, improving the sensitivity of the pointing stick device.

Abstract: The objective of the invention is to provide a compact and complex electronic component incorporating a rotary encoder capable of exact adjustment and a push switch with a long life-cycle. In order to achieve the objective, the push switch is fixed on a rear wall or a lower surface of the electronic component such that an essential of the push switch, i.e., a dome-shaped member, can be made larger and has longer fatigue life. Moreover, the rotary encoder includes a rotatable member and a resilient member. The rotatable member has a gear-shaped flange and is rotatable circumferentially relative to a central shaft of the rotary encoder. When the rotary encoder rotates, the resilient member, relative to the central shaft, is stationary. The resilient member has a V-shaped portion retained by a surface of the gear-shaped flange of the rotatable member such that the rotary encoder can be exact adjusted.

Abstract: A key device for a computer keyboard has a rigid printed circuit board, a flexible printed circuit board, and a key structure. The rigid printed circuit board has two adjacent but unconnected conductive ends electrically connected to two wires respectively. The flexible printed circuit board, fixed over the rigid printed circuit board, has a conductive segment installed above the two conductive ends, and an isolation layer installed around the conductive segment to form a gap between the conductive segment and the two conductive ends. The key structure is moveably fixed on the flexible printed circuit board in an up and down manner. When the key structure is pushed downward, the bottom of the key structure will touch the conductive segment of the flexible printed circuit board, and the conductive segment will touch the two conductive ends of the rigid printed circuit board to electrically connect the two conductive ends and the two wires.

Abstract: A tricycle comprises a front tube, a handlebar frame, a front fork, a front wheel, two footboards, and a swiveling member. The handlebar frame is put through the front tube. The front fork is fastened with the bottom end of the handlebar frame for fastening the front wheel. The two footboards are pivoted with the front tube and are formed of a bottom tube, a step board, and a rear wheel. The swiveling member is pivoted with the front tube and is provided at the top end and the bottom end with a cross rod. The two cross rods are arranged at an interval between the two bottom tubes.

Abstract: A removable silicon cap mounted on the top of a cursor control device is provided. The silicon cap has an outer surface, which is covered with an adhesive layer, and an inner surface. A plurality of fibers are attached to the adhesive layer. The silicon cap characterizes in that each fiber has a column portion and a base portion. The base portion is embedded in the adhesive layer to enhance the detachment-resistant capability of the fiber during use of the cursor control device.

Abstract: A key device for a computer keyboard has a rigid printed circuit board, a flexible printed circuit board, and a key structure. The rigid printed circuit board has two adjacent but unconnected conductive ends electrically connected to two wires respectively. The flexible printed circuit board, fixed over the rigid printed circuit board, has a conductive segment installed above the two conductive ends, and an isolation layer installed around the conductive segment to form a gap between the conductive segment and the two conductive ends. The key structure is moveably fixed on the flexible printed circuit board in an up and down manner. When the key structure is pushed downward, the bottom of the key structure will touch the conductive segment of the flexible printed circuit board, and the conductive segment will touch the two conductive ends of the rigid printed circuit board to electrically connect the two conductive ends and the two wires.

Abstract: A thin film circuit includes a thin film switching circuit with an upper circuit layer including at least one upper joint, and a lower circuit layer including at least one lower joint corresponding to the upper joint. The lower circuit layer is set under the upper layer, and an air-filled space is disposed between the upper joint and the lower joint. The thin film switching circuit further includes at least one first air conduit set between the upper circuit layer and the lower circuit layer and connected to the air-filled space, and at least one bus structure connected to the thin film switching circuit and extending out of the thin film switching circuit to transmit electrical signals of the thin film switching circuit. The bus structure includes at least one second air conduit.

Abstract: A method of manufacturing a pointing stick is provided. A post or a substrate of the present invention is provided with a hollow portion, and a predetermined gap is defined between the post and the substrate. After an adhesive is supplied to the gap through the hollow portion, it is heated to join the post and the substrate.

Abstract: A membrane switch including a plurality of upper dot-pads and a plurality of lower dot-pads is provided to enhance the operational sensitivity while avoiding unexpexted actuation of membrane switch is provided. The plurality of upper dot-pads are provided during the print process of the top switch-pad and distributed to surround the top switch-pad. A plurality of lower dot-pads corresponding the plurality of upper dot-pads are provided during the print process of the bottom switch-pad and distributed to surround the bottom switch-pad. Each of the plurality of upper dot-pads has a lower-edge and each of the plurality of lower dot-pads has an upper-edge. As the top membrane is free of an external force, the lower-edge of top switch-pad is spaced from the upper-edge of bottom switch-pad by a first dimension greater than a second dimension by which the lower-edge of each upper dot-pad is spaced from the upper-edge of each lower dot-pad.

Abstract: A membrane switch including a rubber dome, an insulation layer, a membrane and an electric-conductive support plate is provided. The membrane switch is ON as the pair of non-contacting circuit leads is forced to contact with the support plate due to the force applied on the rubber dome. As the rubber dome is free of an external force, the pair of non-contacting circuit leads is spaced from the support plate, resulting in an OFF state of the membrane switch.

Abstract: The switch actuator provided comprises a rubber dome, a housing, a keytop and a plunger. The rubber dome is seated on the switch and is selectively deformed to actuate the switch. The housing receives the rubber dome therein and has an upper opening defining an edge of the opening and has an inner surface. The plunger moves reciprocally within the housing and is guided by the edge during the reciprocal movement of the keytop. The keytop, which has a bottom surface, moves reciprocally and vertically together with the plunger to selectively deform the rubber dome to actuate the switch as the result of the operation of the user. The invention is characterized in that a slant surface is formed on the inner surface of the housing to retain the bifurcated hook end of the plunger to reduce the noise generated during movement of the plunger.

Abstract: The signal transmission flat cable provided includes a first layer of substrate membrane, a second layer of a plurality of parallel traces for transmitting the signal, a third layer of finger array and a fourth layer of thin polyester membrane. The third layer of finger array covers the second layer. The fourth layer of thin polyester membrane is used to protect the second layer and third layer. The signal transmission flat cable is characterized in that the plurality of finger arrays are provided in the third layer at a plurality of predetermined locations along the flat cable and each of the plurality of finger arrays is spaced from each other by a given distance. A glue material is provided to bond the fourth layer and the second layer along the given distance.