Abstract: There is disclosed a non-contact type mode sensing device for use in an electric appliance. The mode sensing device comprises a stationary body, a driven gear rotatably fixed on the pin of the stationary body, and an optical coupler having a light emitter and a light receiver. The driven gear is provided with a circular reflective track formed on the bottom surface thereof. A plurality of reflective portions are formed, along a circular track, on a bottom surface of the driven gear. The reflective portions have different arcuate lengths from one another. The light beam emitted by the emitter of the optical coupler is reflected by the reflective portions and received at the receiver during the rotation of the driven gear, thereby allowing the optical coupler to produce signals in response to the presence or absence of the light reflected by the reflective portions.

Abstract: A device for dissipating heat generated from an electronic device package located above an upper face of a printed circuit board. This device can be a heat sink having a base in contact with an upper face of the electronic device package, and at least one fin formed on the base to dissipate the heat from said electronic device package. This device also has a pair of clips for clamping the base of the heat sink to the electronic device package to maintain a close thermal contact between the heat sink and the electronic device package.

Abstract: A cassette loading device for use in a video cassette recorder includes a pair of side walls, a rotating arm shaft, a cassette holder, and a pair of loading arms. Each of the loading arms is provided with a lengthwise open slot for retaining a slide pin of the cassette holder, first and second legs. The first leg has an urging portion and an elongated hole for providing the urging portion with resiliency, the urging portion being integrally molded with the first leg.

Abstract: A VCR having a capstan brake device has a flywheel having a friction plane on the lower portion thereof. The flywheel is installed to one end of a capstan shaft piercing through a chassis, and a brake member is installed to one side of the flywheel for swinging toward the friction plane. The brake member is installed with a hinge-coupled fixing rod and a fixedly-coupled operating rod and support rod. The support rod sets the brake member to an applying state by a spring, and the operating rod sets the brake member to a releasing state by a cam having a guide groove and an operating groove. Thus, rotating speed of the flywheel is constantly decelerated, and the operation of the brake member is promptly and accurately carried out.

Abstract: A VCR has a reel sensor prism device fabricated by being separated into a scattering member and a fixing member. The scattering member includes a cylindrical body part for transmitting light and a head formed to the upper portion of the body part for scattering the light. A fixing member is formed with a center hole of being inserted with the body part of the scattering member, and two pairs of hooks are formed to the lower end. A base for supporting and fixing the fixing member is formed with two pairs of hook holes and a thruhole for passing the light generated from a reel sensor light emitting part therethrough. By this construction, the light generated from the reel sensor light emitting part is prevented from being scattered at the body part to minimize loss of the transmitted light, thereby maximizing the transmitting effect of the light and preventing a malfunction of the VCR.

Abstract: A tape tension control device for use in a video cassette recorder incorporates therein a band brake positioned around a supply reel and a tension lever connected to the band brake and rotatably mounted on a deck. The tape tension control device includes a support post mounted on the deck, a frame provided with an elongated slot through which the support post is retained, a pair of lugs and a fixing plate for connecting the frame to the band brake, and a through threaded-hole formed through a rear wall of the frame, a cap washer for preventing the frame from vertically deviating with respect to the support post. An adjusting screw is engaged into the through threaded-hole.

Abstract: A tape tension controlling/adjusting device for use in a video cassette recorder provided with a deck and a supply reel comprises a tension lever rotatably mounted on the deck to be biased toward the tape by a coil spring and having a tension pole coming into a contact with the tape, a band holder mounted on the tension lever and including a cylindrical body and a lug shaft eccentrically extending from the cylindrical body, and a band brake including a film and a felt portion attached to the film, wherein the band brake is retained around the cylindrical body at its one side by a fixing tool and the other side thereof is mounted around the supply reel.

Abstract: A VCR having a reel brake device is formed with plural friction projections arranged along the outer circumference of a reel table at a regular interval and plural correspondent projections having the identical pitch on a felt surface of a brake member closely attached to the friction projections. Once the brake is to be applied in a released state, the VCR produces a secure braking force by a frictional force between the friction projections and correspondent projections to prevent slack of a tape and degradation of picture quality.

Abstract: The present invention is related to a discharging device for a head drum, and more particularly to a discharging device, wherein the static electricity which occurred from the head drum is effectively discharged using the discharge device. A fixed end of a bracket is fixed on a main chassis by a screw, and a free end forms a bracket protrusion. A coil spring is put on the free end of the bracket. A first end of a leaf spring is put inside the coil spring together with the free end of the bracket, and the first end forms a leaf spring protrusion. A tip is installed between a second end of the leaf spring and the head drum. Static electricity transmitted to the tip is transmitted to the bracket via the leaf spring. Then, static electricity is discharged through the main chassis. Thus, this discharging device can improve productivity since extra riveting or bonding is unnecessary.

Abstract: A VCR having a reel gear brake device is formed with a friction plane along the circumferential plane of a reel gear, and a brake member arranged to be able to swing about a hinge shaft toward the friction plane by a predetermined angle. An operational spring is installed between one end of the brake member and a brake operating member, and one end of the brake member projects to extend for forming an elastic beam. A control cam eccentrically rotated at the center of the elastic beam is closely installed for minutely controlling the braking force of the brake member since the elastic force of the elastic beam is changed in accordance with the rotated positions of the control cam. Thus, the operation of the brake member is maintained in the optimum state and manufacturing cost is lowered to enhance assembling productivity while the construction is simplified.

Abstract: A cassette lid pre-opening device for use in a VCR employs an actuating lever having a folded-in end for biasing the locking lug of a cassette inserted in the VCR to a release position, and a fan-shaped end having a protrusion for pre-opening the cassette lid. The protrusion has a slope for slightly opening the cassette lid to a given angular extent as a preparatory operation for the opening of the access lid.

Abstract: A video cassette recorder is provided with a device for driving selectively one of a supply reel disc and a take-up reel disc rotatably mounted to a deck thereof, which includes a pulley coupled to a shaft of the deck, a driving gear coupled to the shaft of the deck, a clutch assembly jointed the pulley and the driving gear, an idle gear meshed with the driving gear and disposed between the supply reel disc and the take-up reel disc for a selective engagement with the one of the reel discs by a rotating torque of the pulley, a support plate pivoted at the shaft of the deck for supporting the idle gear, and a plurality of resilient pieces integral with the idle gear and in contact with the support plate. The support plate is provided with a screw secured thereto for adjusting the frictional force generated between the idle gear and the support plate. The support plate includes a cylindrical rib formed at a lower portion thereof.

Abstract: A head drum ground system for use with a VCR comprises a PCB having a grounding terminal; and an electrical coupler electrically connected to the grounding terminal of the PCB at its opposite ends and resiliently contacted with a lower portion of a rotating shaft of a head drum. In accordance with the present invention, the electrical coupler is utilized so that static electricity generated from a rotating drum be transmitted to the grounding terminal of the PCB board through a rotating shaft.