Murata Manufacturing Co., Ltd.

Murata Mfg. Co., Ltd.

Katsuo Ito

Kazunori Yoshimura

Bunjiro Murata

Kazunori Kinoshita

Yoji Maeda

Eiichi Hibino

Kazuhiro Tsuji

Kazuo Kontani

Wataru Kakinoki

Masanobu Okada

Masao Uno

Hiroaki Fukuchi

Youji Maeda

Takami Yamamoto

Kiyoshi Kawakita

Yoshio Murata

Shigeki Takase

Kenichi Yamaguchi

Yasushi Senga

Toichiro Sawabe

Masahiro Nishimura

Yukio Kudoh

An appearance protective case and an appearance protective case assembly are provided in which damage of a colored or marked pattern due to exposure is prevented, and in which the structure of a formed member having the colored or marked pattern printed thereon is made simple so that the formed member is easily incorporated into the appearance protective case. The appearance protective case includes a sheet-like formed member formed by draw-processing a sheet-like member treated with coloring or marking and a transparent or translucent cover case, and is assembled by fitting the sheet-like formed member into the cover case such that the sheet-like formed member extends in close contact with the inner surface of the cover case.

Appearance protective case and appearance protective case assembly

A communication card and the structure of a jack therefor. The end face of the card is provided with a slit-like aperture. Into the aperture there is inserted a base plate having a thickness smaller than the width of the aperture so as to allow insertion into the interior of the card and removal from the card. The base plate is provided with a notch directed to the outside when viewed from the card. The notch passes through the base plate in the direction of its thickness. The jack is formed by utilizing this notch. The plug, on the other hand, is of a rectangular parellelpiped shape and is electrically coupled to a cord. The inner surface of the notch is configured so as to be able to receive the plug. When the plug is inserted, the notch receives and holds the plug. At that time, the notch receives and holds the plug in such a manner that the direction of the longest edge among the edges of the plug, or the extending direction of the cord is parallel to the major planes of the card.

Communication card and structure of jack for use in the same

A high frequency device having a shield casing with the interior divided into small sections by shield plates, and with circuit blocks of a high frequency circuit in the respective sections including substrates with circuit components on the upper surface with terminals extending through the substrate to a printed circuit on the lower surface. A feedthrough capacitor is mounted in the casing or in the shield plate, or both, in a level corresponding to the level of the substrate, such that the feedthrough terminal of the capacitor extends adjacent the printed circuit, and such that, when the device is immersed in solder to solder the terminals of the components to the printed circuit, the feedthrough terminal of the capacitor is also soldered to the printed circuit and the capacitor itself is also soldered to the casing or the shield plate. Further, steadying fingers are provided around the fixing hole portion in the casing or plate, and these are spaced around the periphery of the fixing hole portion so that the two fingers nearest the bottom edge of the casing or plate are a maximum distance from the edge, so as to maximize the resistance of the casing or plate to distortion when the fingers are bent laterally from within the fixing hole portion.

Structure for fixing feedthrough capacitor in high-frequency device and

An antenna device used for a UHF tuner or the like, which comprises a combination of an antenna coil formed of single-covered wire with an insulator covering the antenna coil. The insulator is dividedly molded into a coil containing member having an antenna coil containing recess and a terminal member having a pair of antenna terminals and a resistor containing recess, a fitting portion to be fitted between the coil containing member and the terminal member is provided, and at the terminal member a cover for closing an opening at the coil containing recess. The coil containing member containing the antenna coil in the coil containing recess and the terminal member containing a resistor in the resistor containing recess are integrally connected by press-fitting of the fitting portion and the antenna coil is housed in the insulator, thereby obtaining the insulating property equivalent to a double covered wire without deforming the the coil during or after the assembly of the antenna device.

Antenna coil with integral housing

A connecting structure of diodes in a double-balanced mixer for connecting the diodes on a substrate, which includes four diodes disposed in a row on one side face of a substrate, with the four diodes being arranged so that the diodes at the outer side in the row are directed in the same direction, while the diodes at the inner side in the row are directed also in the same direction to each other, and that the diodes at the outer side are directed in an opposite direction to the diodes at the inner side, and two rows of wiring patterns disposed on the substrate at one end side of each of the diodes in a direction generally intersecting the diodes, with alternate diodes of the four diodes being respectively connected to the corresponding wiring pattern.

Connecting structure of diodes

An electrical shielding case for shielding a plurality of circuits from each other, which includes a plurality of plate portions formed by dividing a metallic flat plate, and remaining parts of the plate portions left for connection when outer peripheries of the plate portions are cut off, with each of the plate portions being folded at the remaining portions as fulcrums so as to form the electrical shielding case, and is characterized in that there are provided bendable cut and raised portions formed at parts of other confronting plate portions interfering with end faces of the plate portions upon folding thereof.

Electrical shielding case

A mounting structure for temporarily mounting electronic parts fitted into a mounting bore formed in a frame and fixedly soldered at the fitted portion thereto enhances assembly and soldering. The mounting structure includes a tongue integral with the frame, folded thereover, and positioned around the mounting bore, so that the electronic part fitted therein is elastically fixedly supported on the frame by the tongue although the mounting bore is formed slightly larger in diameter than the fitted portion of the electronic part. The electronic part is thus temporarily fixedly held in the frame for being fixedly soldered to the frame with accuracy.

Mounting structure for electronic parts

A feedthrough capacitor arrangement which comprises a frame having a first recess, printed circuit boards disposed in the vicinity of the frame, a feedthrough capacitor having an outer electrode and a central electrode placed in the first recess and a shield member for pressing the feedthrough capacitor placed in the first recess thereby to hold the feedthrough capacitor in association with the frame. In this arrangement, the outer electrode of the feedthrough capacitor is soldered to the frame and to the shield member while the central electrode is soldered to conductor patterns on the printed circuit boards.

Feedthrough capacitor arrangement

An electronic component made by the steps of: preparing elongated tape (10), distributing a plurality of pairs of electronic elements (1) over the tape (10) lengthwise of the latter and bonding the pairs to the tape (10) in such a manner that the two elements (1) in each pair are positioned one in each of the first and second regions (12, 13) of the tape (10) separated from each other substantially by the longitudinal centerline (11) of the tape (10), folding the tape (10) along the longitudinal centerline (11) so that the two elements (1) in each pair are opposed at least partially to each other, preparing a terminal assembly (18) having a frame (17) on which a plurality of terminals (14, 15, 16) to be connected to the elements (1) are held so that they are distributed lengthwise of the frame (17), arranging the frame (17) parallel to the tape (10) and effecting connection between the terminals (14, 15, 16) and the elements (1), cutting the tape (10) along widthwise extending cutting lines to separate the sets of elements (1) from each other, and cutting off the terminals (14, 15, 16) from the frame (17).

Electronic component comprising printed circuit elements disposed on a

An improved fine adjusting mechanism for a preset type tuner, which is so arranged that, with a ring having cam portions being fitted under pressure onto a fine adjusting shaft of a tuner for simultaneous rotation with it and also for slippage with respect to the fine adjusting shaft against a torque larger than a predetermined extent, a lever having a transmission gear rotatably mounted on it is urged by a spring force so that its actuating projections are held in pressure contact with the cam surface of the ring with the cam portions, so that rotation of the fine adjusting shaft is converted into a pivotal movement of the lever through the ring so as to positively engage the transmission gear with each of gears having threaded portions for an efficient local oscillation frequency adjustment.

Fine adjusting mechanism for preset type tuner

A CATV system comprises two coaxial cables (11, 12) for transmitting information obtained from a center unit, a slide switch (1), and a CATV converter (30). As a slider (73) of the slide switch is slided in one direction with the same in contact with a common contact (101) connected to the CATV converter, the slider is placed in contact with a first fixed contact (104) connected to one coaxial cable while a first terminating contact (110) connected to a first terminating resistor (13) is separated from the first fixed contact. When the slider is slided in the other direction, the slider is placed in contact with a second fixed contact (107) connected to the other coaxial cable, while a second terminating contact (111) connected to the second terminating resistor (14) is separated from the second fixed contact. Accordingly, each of the coaxial cables is not opened through selection of the slide switch, whereby mixing of an image is prevented from occurring due to mismatching.

CATV System

A shield case having openings at both ends is fabricated by drawing a blank and the opening at one end of the shield case is formed at the periphery thereof as a flat annular receiving portion, with a portion intermediate the receiving portion and the case side surface curved with a gentle curvature. A capacitor including a doughnut shaped dielectric unit is disposed inside the shield case contiguous to the receiving portion and a metallic cylinder is provided extending through the aperture of the dielectric unit of the capacitor and the one end opening of the shield case. One electrode is formed on one main surface of the doughnut shaped dielectric unit, while the other electrode is formed on the other main surface of the unit and a lead out electrode is also formed around the aperture on the other main surface of the unit electrically isolated from the said other electrode. A resistor film is formed between the other electrode and the lead out electrode, and electrical connection is made between the metallic cylinder and the one electrode, and an electrical connection is also made between the metallic cylinder and the lead out electrode, while these are mechanically fixed.

Capacitor combined shield case

A housing for an electronic tuner or the like comprises: a shield frame defining a space to house circuitry, and an auxiliary base plate enclosing one side of the space left open by the frame and preferably serving to shield the circuitry in cooperation with the shield frame. A novel structure is disclosed for mechanically securing the auxiliary base plate to the shield frame simply and in such a manner that the auxiliary base plate can be easily removed if necessary. The frame and the auxiliary base plate engage each other elastically and resiliently by means of tongues, apertures and/or notches. No special step of either soldering or bending the auxiliary base plate or shield frame with pliers, etc., is required to maintain the parts in position. One or more shield plates may be supported by the auxiliary base plate and the shield frame and divide the space into sections.

Provisional fixing structure of electronic tuner

A fixing structure is disclosed for fixing an intermediate frequency transformer or other electronic component to a flexible and deformable base plate. The component comprises a base portion for fixing it to the base plate and the base plate is formed with an aperture for receiving the base portion. The base plate includes a strip portion extending along a portion of the periphery of the aperture. The component is provided with a protrusion which extends laterally from the base portion thereof. The protrusion is so formed and so located on the base portion of the component that when the base portion is inserted into the aperture, the protrusion engages the strip portion and deforms it in a direction perpendicular to the surface of the base plate, so that the diameter of the aperture shrinks, whereby the base portion is strongly gripped by at least a portion of the periphery of the aperture.

Fixing structure of electronic component

A high frequency apparatus such as an electronic television tuner comprises a main base plate having a circuit pattern and components disposed on it. A shield casing encloses and supports the main base plate by encompassing it at its peripheral edge. The shield casing is open at one side corresponding to one edge of the main base plate and is preferably also open at the upper and lower surfaces of the casing. The opened side of the shield casing is provided with an auxiliary base plate having a shield conductive film on its outer surface. The main base plate has a plurality of first apertures and the auxiliary base plate has corresponding pluralities of second and third apertures. Capacitor elements are inserted through at least some of the second apertures. The first apertures and apertures in the capacitor elements receive corresponding end portions of L shaped connection terminals. One end of each of the connection terminals is electrically connected to the circuit pattern, while the other end of each terminal is electrically connected to the hollow portion electrode of each of the cylindrical capacitor elements. Each of the connection terminals preferably has an integral protrusion received in the third aperture, for positioning the connection terminal. The open top and bottom surfaces of the shield casing are covered with shield covers.

Growing community of inventors

Kanazawa, Japan

Katsuo Ito