Abstract: Buzz reduction circuit for eliminating a vertical period buzz without being influenced by amplifier circuits in an audio signal line. A video signal of a VCR video head is input to a vertical synchronizing signal separating circuit to separate a vertical synchronizing signal. A vertical synchronizing pulse is obtained by an integral circuit and a vertical period buzz reduction signal is produced by a vertical period buzz reduction circuit, said vertical period buzz reduction signal having an equal output level and an inverted phase in comparison with the vertical period buzz. The vertical period buzz reduction signal is inputted to a pre-stage of an audio amplifier circuit in an audio output line of a linear audio head to reduce the vertical period buzz included in an output signal of the linear audio head.

Abstract: The invention provides a disk device that is excellent in strength, an easy installation and adjustment performed in the manufacturing process, an easy maintenance and repair work performed, and the safety during repair and maintenance work further achieving a cost reduction. A clamper 41 is provided and a board 12 having an area in which at least the irradiation range of laser light emitted by an optical pickup is covered is fixed to a frame 11 that constitutes a disk device 1 by screwing or the like, thereby improving the strength, safety, and workability of the disk device 1.

Abstract: A crosstalk inhibition unit which can inhibit crosstalk without causing an enlargement of a signal processing apparatus. A crosstalk inhibition unit 10 in order to inhibit crosstalk is provided to a signal processing apparatus. The crosstalk inhibition unit 10 is comprised of a contact terminal detection means 8 for detecting whether a contact terminal 7b of a signal cable 7 is inserted to an external terminal 5b of the signal processing apparatus and a first switching element 2 which operates differently depending on whether the contact terminal detection means 8 detects the contact terminal 7b. When the contact terminal detection means 8 does not detect the contact terminal 8, the first switching element 2 becomes conductive, and a signal line 15b is grounded. Thus, the cable 7 is not connected, and a signal line 15b, which is not used for signal processing is grounded. Accordingly, without particularly providing a grounded line, crosstalk between signal lines 15a, 16 and 19 can be inhibited.

Abstract: The present invention provides an electronic device with external speaker in which the speaker can be readily attached/detached and loose connection can be prevented even when the speaker is attached/detached repeatedly. A locking hook 33 of an external speaker 30 is inserted into a locking hole 16 of a cabinet 11, and a connecting terminal 37 provided in the cabinet 11 is inserted into a connecting jack 20 provided in the external speaker 30. The connecting jack 20 is pressed by the biasing force of a spring 23 serving as an biasing means, and is held on a position engaged to the connecting terminal 37. Then, the external speaker 30 is moved by sliding to lock the locking hook 33 into the locking hole 16. At this point, the connecting jack 20 moves along the moving direction of the external speaker 30 against the spring 23. Hence, it is possible to connect a connector pin 38 of the connecting terminal 37 without interfering with the sliding movement of the external speaker 30.

Abstract: The present invention provides an on-screen display device capable of freely changing a display position, coloration of a display color, and brightness level and moving the display position simply and speedily. When a clock and channel are displayed on-screen and superimposed on an image signal, it is possible to receive a remote control signal from a remote control device 9 and arbitrarily change the display position, display color, and brightness through an OSD position control section 2, OSD color control section 3, and OSD brightness control section 4 of a microcomputer 1. This makes it possible to display the display position of the clock or channel, etc., at an optimum position easily viewable to a user and adjust the display color and brightness in an easily viewable manner. When changing the display position, the display position of a character is moved to an area of a screen 20 assigned to a number key beforehand by operating number keys of the remote control device 9.

Abstract: The present invention provides a disk device including an alarm indicating portion that forms a high-visibility indicating portion in the disk device, which give a warning about directly viewing a laser beam of the disk device when the disk device is disassembled. A high-visibility protruding indicating portion 17 is formed near a pickup lens 14A and in a rear side of a tray 11 in a disk device 10 in which the pickup lens 14A irradiates a laser beam to a recording surface of a disk placed on the tray 11 carried into/out of the disk device 10 to perform recording/reading, thereby preventing the irradiated laser beam from being viewed.

Abstract: In order to facilitate fixing an operating button to the front panel of an electric device, the operation button includes a rectangular frame having at least one engagement piece integrally connected to and extending downwards from its bottom side. The operation button can be fixedly held on the lower side by press-fitting the engagement piece into an associated engagement slot made in the bottom plate of the cabinet. The front panel has at least one tapped boss fixed to its rear side, thereby allowing the frame to be screwed on the upper side to the tapped boss. Alternatively, the front panel has at least one apertured engagement piece fixed to its rear side, whereas the frame has at least one yieldingly bendable curved hook integrally connected to its upper side. The curved hook has a nail formed at its free end. The upper side of the operation button is fixed to the front panel by press-fitting the nail of the curved hook in the aperture of the engagement piece of the front panel.

Abstract: The invention provides an electronic apparatus to which a circuit board is attached so that noise caused by a drive unit can be prevented. The electronic apparatus includes a drive unit 2 and a circuit board 5 mounted with electronic components 4 for controlling the drive unit 2. Conductive circuit patterns are formed on both sides of the circuit board 5, and the electronic components 4 are mounted only on one surface of the circuit board 5. The circuit board 5 is attached to the electronic apparatus with anon-mounting surface thereof faced to the drive unit 2, whereby noise caused by the drive unit 2 is blocked by the circuit board 5. Consequently, it is possible to reduce noise of the drive unit 2 from affecting the electronic components 4 mounted on the circuit board 5. In addition, since the non-mounting surface of the circuit board 5 is faced to the drive unit 2 side, the freedom of design on the device side is improved.

Abstract: The invention provides a disk device having a reinforcing structure that is excellent in strength and that prevents the disk device from deforming due to the deforming of a casing of the electronic device, or due to heat generated by various devices and components built into the electronic device. Reinforcing portions 12, formed to have a double rib structure with an angulated U-shape cross-section, are formed between front leg portions 11F and rear leg portions 11R, integrally formed to the frame 10A constituting the disk device respectively, whereby deformation of the frame 10A constituting the disk device is prevented.

Abstract: The invention relates to an inner shield for color cathode ray tube. The inner shield has two long side parts and two short side parts. Each of two long sides has an opening part which comprises an inclined part and an U-shape recessed edge. Otherwise, the opening part may comprise an vertical part and an U-shape recessed edge. Each of two short sides has a V-shaped opening. The inner shield of the invention is capable of surely shielding unintended external magnetic field.

Abstract: An easy-to-operate support structure of a cover in which the cover can stably remain upright and specifically elongated wires are not required for connecting a substrate fitted to the cover and a substrate of a case main body is provided for a cover support structure of a shield case including a case main body having a bottom plate, side plates and a back plate and a cover having an upper plate and side plates covering the case main body. To prevent the cover from turning down when the cover is opened, engagement grooves capable of meshing with the back plate and/or the side plates of the case main body are formed in the upper plate and/or the side plates of the cover, and the cover can turn upright when the engagement grooves are meshed with the back plate or the side plates of the case main body.

Abstract: Disclosed is an improved jump wire structure for a printed circuit board. The structure includes at least one jump wire having its opposite ends bent in same direction so as to face one another, and at least one slot provided in an upper surface of the printed circuit board. The slot has through holes provided at its opposite ends to permit insertion of the opposite ends of the jump wire. The jump wire can be put and fixed in the slot by inserting its opposite ends into the opposite through holes, bending the opposite ends and then soldering these bent ends to a printed circuit pattern formed on a lower or rear surface of the printed circuit board. This arrangement permits increase of a mounting density of parts and devices on the printed circuit board without fear of short-circuiting.

Abstract: Disclosed is an improved composite substrate for use in a magnetic recording-and-reproducing device. It comprises an “L”-shaped main plate and a separate sub-plate. The “L”-shaped main plate has a major section of relatively large area and a minor section of relatively small area, integrally connected to one side of the major section. The sub-plate has a square or rectangular piece cut and separated from the minor section of the main plate. When being inversely arranged and jointed together two composite substrates can define a square or rectangular shape.

Abstract: A tape transport apparatus enabling a tape winding to be completed even if a winding load is applied to interrupt the tape running during a fast-forward running mode or rewinding running mode. An output voltage applied to a drive motor driving a supply reel or a take-up reel is set at a high voltage during a fast-forward running mode or rewinding running mode and a load flag is turned ON. When a rotation number of the drive motor is reduced under a predetermined rotation number due to the occurrence of the winding load during the load flag being ON, the output voltage applied to the drive motor is sifted from a high voltage to a low voltage and the drive motor is continuously driven to rewind the tape.

Abstract: In a complex electronic device, in which device units are arranged so as to have substantially the same height of medium loading spaces, in connecting a circuit board for operation button control and each operation unit by use of FFCs, wiring in a limited space is possible even when the FFCs are bent or folded, without exerting an adverse effect on the arrangement of other parts.

Abstract: The present invention provides an injection molding method and a thin-plate molded product formed thereby. The method for forming as molded product a thin-plate molded product by injecting a molten material such as resin into a cavity of a mold formed of a fixed mold and a movable mold comprises disposing slide core molds defining the cavity across substantially a whole length on at least three directions of the thin-plate molded product, providing projections to the slide core molds that face the cavity, injecting molten resin into the cavity and cooling the same, moving the movable mold to open the mold, receding the slide core molds disposed on at least three directions of the thin-plate molded product, and projecting the molded product via eject pins provided to the fixed mold.

Abstract: Disclosed is a printed circuit board-interconnecting structure for integrating two printed circuit boards in a state of being electrically connected. The manufacturing cost is minimized. The board integrating structure permits the automatization of assembling parts, and can meet the occasional requirements for changing the inter-distance between the confronting printed circuit boards. Each printed circuit board has an ordinary connector attached to one side, and a rectangular hollow socket is sandwiched between the confronting printed circuit boards to enclose the connectors, and a short length of flexible flat cable lined with a reinforcement piece traverses the inter-space between the confronting connectors forts conductors to be put in contact with the terminals of the connectors.

Abstract: A printed circuit board having circuit patterns printed thereon has a plurality of composite lands each including a first land having a terminal hole formed at its center for inserting the terminal of a selected electric or electronic part or device, and a plurality of second lands each being contiguous to and extending outwards from the first land. The areas contiguous to the contours of the first and second lands have no conductive foils, such as copper foils, thereon such that the substrate surface of the printed circuit board is exposed in these areas. The exposed areas are effective to confine the thermal energy in the limited areas for soldering. And the composite land shape defines a ridged cone-like solder lump, which can fixedly grip the terminal of the part or device.

Abstract: Disclosed is a tray structure for loading in and unloading a disk from a disk drive. It comprises rearward and forward parts hinged together, thereby permitting the forward part to gravitate and incline downward when the forward part is pulled out of the disk drive. The forward part has guide pieces integrally connected to its opposite sides for mating with the guide rails of the disk drive when putting the tray structure in the disk drive. The approximately two thirds of the full length of the tray is required in taking out and putting the disk on the tray, and accordingly the space allotted to the taking-off and putting-in of the disk is much smaller than the pulling-out of the tray over its whole length.