Abstract: A test device for leakage-proof of a keyboard comprising a test platform having a base end provided with a test recess to hold keyboard for testing; a vacuum pump connected to the test recess by a tube to vacuum the test recess; a vacuum display connected to the vacuum pump by a tube to display the status of a vacuuming of the vacuum pump; at least a vertical driving device, mounted at the top portion of the test portion of the test platform, having an actuating rod to reciprocate; and a cover connected to the actuating rod of the vertical driving device capable of moving up and down by the actuating rod, and having the top portion provided with a hole for venting; thereby, the downward movement of the actuating rod drives the cover to cover the test recess which already holds a keyboard for testing, and the vacuum pump vacuums the vacuum recess for testing and the vacuum display indicates the status of vacuuming so as to determine leakage-proof of the keyboard within the test recess.

Abstract: A pushbutton of a keyboard includes a cap supported on a base board by a linkage comprising first and second links pivoted together whereby the cap is movable from a released to a depressed positions when depressed. Each link has upper and lower pivots respectively connected to the cap and the base board. The links have two side bars connected between the upper and lower pivots thereof. A cross bar is connected between the side bars of the first link. A resilient arm extends from the cross bar and forms a nub on a free end thereof. A rigid arm extends from one side bar of the second link and has a wedge section having first and second surfaces forming an apex therebetween. The nub of the resilient arm is in contact engagement with the first surface when the cap is at the released position. The nub slides over the apex to reach and engage the second surface when the cap is depressed and moved to the depressed position whereby a pulse-like reaction is generated.

Abstract: A push button of a keyboard includes a cap movably supported on a base plate by two link members which are pivotally attached to each other and pivotally attached to both the cap and the base plate. A rubber cone is arranged between the cap and the base plate whereby when the cap is depressed, the rubber cone is deformed to trigger a switching circuit for generating a signal associated with the depression of the push button. Pairs of projections are formed on the cap defining a gap between each pair for rotatably accommodating upper pivot pins of the link members. Each projection forms an inclined face opposing each other for guiding and facilitating insertion of the upper pivot pins therein. Tabs are stamped on the base plate and define spaces for rotatably accommodating lower pivot pins of the link members. The tabs form inclined edges for guiding and facilitating insertion of the lower pivot pins into the spaces thereof.

Abstract: A disk tray is mounted in an optic disk drive for supporting an optic disk. The disk tray forms a circular recess for receiving the optic disk therein. Openings are defined in the disk tray along a circumference of the circular recess for forming air passages communicating upper and lower sides of the disk tray whereby when the optic disk is rotated at a high speed during the operation of the optic disk drive, pressure difference induced between the upper and lower sides of the disk tray is reduced by air flowing through the air passages.

Abstract: A jig for facilitating soldering of elongate pin to a circuit board having laminated first and second layers of metal in predetermined areas is provided and includes a template supported above the circuit board and at least one support frame supported above the template and the circuit board. The template includes legs descending therefrom which define a space therebetween for snugly receiving the circuit board therein. The template has pin receiving holes formed therethrough in respective alignment with the predetermined areas of the circuit board for the elongate pins to extend therethrough to contact the predetermined areas of the circuit board. The support frame includes pin position adjusting sections resiliently extending laterally therefrom and respectively having pin retaining holes formed therein in correspondence to the pin receiving holes of the template.

Abstract: Disclosed is a flat bed type scanner capable of feeding data sheets one at a time including a scanning table with an optical module installed therein, a cover plate pivotally installed at an end of and covering the surface of the scanning table, and an automatic sheetfed device installed at a predetermined location on the cover plate. A set of inlet rollers and a set of outlet rollers in the automatic sheetfed device are respectively driven by a set of speed reduction gears driven by a motor and respectively located at inner sides of an inlet and an outlet. Two switches respectively installed at the inner side of the inlet respectively control the power of the motor and the optical module. In addition to providing a common scan function, the present invention has another choice of selecting an automatic sheetfed function.

Abstract: A multi-dimensional computer mouse includes a casing in which a circuit board is mounted. Left and right buttons are provided on a top of the casing for functioning as regular mouse push buttons. A third push button is arranged between the left and right buttons. A post extends from the third button to the circuit board. A spherical expansion is formed on a lower end of the post and rotatably received in a socket fixed on the circuit board for forming a joint allowing the post to be rotated from a neutral position to front and rear actuation positions wherein a collar of the post contacts and triggers a front contact switch and a rear contact switch. The post is floatingly supported by a spring arranged between the socket and the collar thereby allowing the post to be depressed against the spring for having the lower end of the post contact and trigger a bottom contact switch.

Abstract: A computer keyboard assembling apparatus includes a holding plate, a support plate and a pushing mechanism all mounted on a work table. The holding plate is movable relative to the support plate to hold the a metal plate and an insulation pad that are received within a keyboard support tray positioned on the support plate in position. The movement of the holding plate also triggers a micro-switch to actuate the pushing mechanism to apply a force to the metal plate through a side opening formed on the keyboard support tray so as to horizontally move the metal plate relative to the insulation pad to have engaging members thereof engaging and secured to each other.

Abstract: A laser marker control system includes a personal computer, a programmable logic control (PLC), a movable carrier table, an industrial man-machine interface and a laser device. The personal computer is linked to the PLC to control the laser device and is linked to the carrier table in a point-teaching operation. The PLC is provided for numeral calculation, signal input, status output and control of the carrier table, and provides signal, data and status exchange when linked to the man-machine interface. The carrier table is the carrier of the work piece, controlled by the PLC to change the position thereof. In the point-teaching operation, the carrier table is linked to the personal computer and the PLC. The man-machine interface is a touch-control monitor for status display and may indirectly control the carrier table when linked to the PLC. The laser device which generates and emits a laser beam for marking operation is connected to the PLC.

Abstract: A power supply circuit for a filament of a vacuum fluorescent display includes an LC series circuit and a capacitor. A first end of the LC series circuit is connected with a secondary winding of a transformer in a switching power supply, and a second end of the LC series circuit is connected with a first end of the filament. A first end of the capacitor is connected with a second end of the filament, and a second end of the capacitor is directly or indirectly connected with a ground source. The LC series circuit and the capacitor form a series resonance circuit, thereby providing an isolated power supply for the filament of the vacuum fluorescent display.

Abstract: A transmission angle adjusting device includes a first transmission device and a second transmission device disposed on the computer and the keyboard respectively. Each of the first and the second transmission devices has an infrared transmitter, an infrared receiver and a transmission angle/direction adjusting device arranged between the transmitter and the computer (or the keyboard) or disposed between the receiver and the keyboard (or the computer). Since the transmission angle/direction adjusting device can adjust the transmission angle of the infrared transmitter, transmission signals from adjacently arranged transmission devices can be separated from each other in order to prevent interference.

Abstract: A CD-ROM testing system includes a personal computer, a programmable logic control (PLC), a testing apparatus with sensors and an industrial man-machine interface. The personal computer is in communication with the PLC for performing tests on the CD-ROM. The PLC is connected to both the personal computer and the man-machine interface to control the operation of the testing apparatus. The testing apparatus is to carry out tests on the CD-ROM and collects the test results. The man-machine interface is to indirectly control the testing apparatus and display test signal. The CD-ROM testing system is capable to replace human labor in continuously testing a plurality of CD-ROMs to provide an efficient and precise test results of the functions of the CD-ROMs and the test results are stored in the personal computer for further use and analysis.

Abstract: A wrist rest for incorporation with a computer keyboard enables a user's wrist to have adequate support when typing and is able to be adapted to be incorporated with a different keyboard by adjusting knobs rotatably provided on two opposed sides of the wrist rest.

Abstract: A transmitter/receiver module of cordless keyboard assembly adapted to be received and fixed inside a disk driver slot provided on the front panel of a computer casing is disclosed, including a frame sized to be received within the disk driver slot, having two lateral sides each having a slot opposite to each other for receiving a transmitter/receiver circuit module in the form of a circuit board which includes an encoder for setting the operation frequency of the transmitter/receiver circuit by means of at least one manually depressible button provided on the circuit module. The circuit module also has a display for showing the operation frequency thereof. A cover lid made of a material through which the signal from/toward the transmitter/receiver circuit module is transmittable is provided to cover the front opening of the frame. The cover lid is provided with an opening for access to the depessible button and observation of the display.