Yazaki Corporation

Honda Motor Co., Ltd.

The Furukawa Electric Co., Ltd.

Furukawa Automotive Systems Inc.

Tetsuya Mitani

Hiromitsu Tsuchiya

Takashi Sato

Kazuto Ohtaka

Hideki Homma

Takahisa Suzuki

Tomoyuki Miyakawa

Masaru Shinmura

Toshiharu Takahashi

Hiroshi Suzuki

Yasuyoshi Serizawa

Kaoru Matsumura

Toshinori Yamamoto

Naoto Sugie

Kazuyuki Iwashita

Nozomi Kawasaki

Shigehiko Mochizuki

Hiroyuki Kurokawa

Masanori Uchibori

Masakazu Hira

Mikio Hanzawa

Masataka Shishido

Daisuke Watanabe

Kyo Karino

Tatsuo Shimada

An electrical connector includes a housing body and a cover. The housing body includes a terminal accommodating hole that accommodates a terminal fitting, and a ferrite accommodating portion that accommodates a ferrite core. The cover covers the terminal fitting and the ferrite core attached to the housing body. The ferrite accommodating portion includes a ferrite accommodation chamber into which the ferrite core is inserted in a first direction perpendicular to a second direction in which the terminal fitting is inserted into the terminal accommodating hole, and protrusions provided on both inner side surfaces of the ferrite accommodation chamber facing in a third direction perpendicular to the first direction. The protrusions are engaged with concave portions formed on both side surfaces of the ferrite core to regulate movement of the ferrite core in the second direction.

Electrical connector

In a stamping step, when a stamping terminal piece formed as a connector terminal is stamped, an electric wire crimping part is stamped and extended from a chain part in a direction perpendicular to a feeding direction, an electric contact part is stamped and extended from the electric wire crimping part in a direction parallel to the feeding direction and a range to which a gold plating is applied by a gold plating step is not overlapped on a range to which a tin plating is applied by a tin plating step in the feeding direction.

Method for manufacturing connector terminal and connector terminal

Provided is a lever fitting-type connector wherein the time for connecting a second connector comprised of a plurality of connector segments to a first connector can be reduced; and a compact connector portion of a wire harness can be obtained. A second connector () fitted and connected to a first connector () by an operation for rotating a fitting operation lever () attached to the first connector (), is configured by combining a main connector segment () with a subsidiary connector segment (). The main connector segment () has a lever engagement portion () to be engaged with the fitting operation lever () when the main connector segment is fitted to an initial fitting position. The main connector segment () is shifted from the initial fitting position to a complete fitting position by an operation for rotating the fitting operation lever ().

Lever fitting-type connector

The present invention provides a LIF (Low Insertion Force) connector fixing a vehicle body panel capable of reducing the number of parts and improving workability. The LIF connector fixed to a vehicle body panel includes a frame including a first guide groove, a first connector connected to the frame so as to be rotated and including a second guide groove, a second connector having a first boss and connected to the first connector by rotating the first connector from a position where the first boss is inserted into the first and the second guide groove at the same time.

Low insertion force connector

In a grommet (), a centering unit and a temporary anchor unit are provided on an outer surface of a grommet inner member (). The centering unit includes a plurality of centering portions (e.g., centering claws) configured to elastically abut on an attachment panel () at an inner edge thereof around an insertion hole () so as to position the grommet inner member () in a center of the insertion hole (). The temporary anchor unit includes a plurality of engaging portions (e.g., temporary anchor claws) configured to engage with the inner edge of the attachment panel (), thereby supporting the grommet () in an axial direction thereof before lock portions (e.g., lock claws) make the grommet inner member () retained at the inner edge of the attachment panel () around the insertion hole () when the grommet inner member () is inserted into the insertion hole ().

Grommet

A grommet () has a central shaft ()through which a wire harness () is inserted. A circular connection portion () is provided continuously to the periphery of the central shaft(.) A convex cross-sectionally V-shaped ring-like lip () is extensibly provided to the circular connection portion () in the direction of the center of the central shaft. A flange portion () is provided continuously to the lip portion (.) When the grommet () is assembled to a body panel (,) the lip () of the grommet () is extended in the direction of the center of the central shaft () of the grommet (,) thereby reducing the diameter of the lip (.) Then, the lip() is inserted into the through hole () of the body panel (.) Thus, a low insertion force is sufficient when the grommet is inserted thereinto. Consequently, the assemblability of the grommet ()is enhanced.

Grommet and assembling method therefor

An ignition device with a series gap includes a series gap assembly having therein a discharge tube. A shielding case is provided to cover the series gap assembly. The shielding case is made of a conductive material and arranged to be in contact with a cylinder head or an engine block so that electrical continuity is held between the shielding case and the cylinder head or the engine block. Accordingly, the shielding case effectively works to provide a reliable electric shielding between the exterior and interior of the shielding case so that electromagnetic wave caused by sparking of the discharge tube is prevented from leaking outside and an ambient electric field is prevented from affecting a discharge characteristic of the discharge tube.

Ignition device with series gap having shielding case

An ignition plug cap having at least a plug cap terminal and a discharge tube as a series gap at one end of a high-tension cord for providing electric high-voltage pulses to an ignition plug in a vehicle, wherein the ignition plug cap further comprises an electrically insulating casing for accommodating the plug cap terminal and the discharge tube, which is formed with heat dissipating means such as a plurality of fins formed on the external surface thereof either in parallel or at right angles with vertical axis of the electrically insulating casing, or they can be simultaneously formed otherwise, apart from a spiral fin and so on. With this construction, heat generated therein is effectively dissipated for controlling a rise of temperature, whereby the components of the ignition plug cap in general will not be readily deteriorated even in long-term severe driving conditions.

Ignition plug cap

This invention provides a discharge tube which is small and easy to manufacture, which prevents the discharge characteristics from being disturbed by a grounded body located nearby, and which makes creeping discharges unlikely to occur and at the same time enhances the degree of freedom in incorporating the discharge tube into devices. The discharge tube of this invention has electrode plates fixed at the ends of the enclosure so that the electrode plates have their discharge electrodes protruding inwardly to face each other. The central portion of one of the electrode plates is bulged outwardly, and the discharge plane of the discharge electrode is located close to a plane including the periphery of the electrode plate.

Discharge tube

A gas-filled discharge tube includes a cylindrical casing (11, 31), a terminal member (12, 13; 32, 33) for closing an open end of the casing, an inert gas sealed within the casing, a gas sealing tube (16, 38) connected to an outside of the terminal member, and gas introduction paths (17, 40) formed in the terminal member so as to communicate between an inner space of the gas sealing tube and an inner space of the casing.

Gas-filled discharge tube

A discharge tube according to the present invention is constructed such that it comprises a cylindrical container made of an insulation tube, a pair of discharge electrodes provided at opposite ends of the cylindrical container, a plurality of insulation coated lines containing a gas-ionization accelerator therein, which insulation coated lines being provided on the inner surface of the cylindrical container covering the regions surrounding a cathode and a discharge space therein in a substantially parallel relation with a center axis of the cylindrical container, wherein the gas-ionization accelerator is made of a silicate powder selected from the group of alkaline metal, alkaline earth metal and so on, or of electrically conductive finely divided particles selected from the group of carbon, metal, metal oxide and so on. The discharge tube according to the present invention shows stabilized discharge inception characteristics even when the frequency of repetitive discharge is low, and in addition, it does not generate an inner creeping discharge even if it is continuously used for a long time, thereby providing a stabilized discharge operation.

A discharge tube according to the present invention is constructed such that it includes a cylindrical container made of an insulation tube, a pair of discharge electrodes provided at opposite ends of the container, a plurality of insulation coated lines containing a gas-ionization accelerator therein, which insulation coated lines being provided in the grooves formed on the inner surface of the container covering the regions surrounding a cathode and a discharge space therein in a substantially same distance from a center axis of the container, wherein the container further comprises a flange portion formed at the cathode-side thereof in such a way that it protrudes inwardly, and the insulation coated lines are provided on the inner surface of the container except the inner side of the flange portion. The discharge tube as constructed above shows a stabilized discharge inception characteristics regardless of the frequency of repetitive discharge, and is also capable of avoiding an inner creeping discharge even when the discharge is repeated for a long time, yet providing a constant life time.

Only one pre-gap is arranged between the ignition coil and the distributor so that it is connected in series with each of the ignition plugs in the engine. A relay device is connected in parallel with the pre-gap. The relay device is normally closed to supply a high voltage from the ignition coil to the distributor, bypassing the pre-gap. Only when sensor signals indicate that the air-fuel combustion state is bad, the relay device is opened to cause the high voltage from the ignition coil to be applied to the pre-gap before being supplied to the distributor. This construction permits the single pre-gap to serve all the cylinders in the engine and prolongs the working life of the pre-gap.

Ignition apparatus with a pre-gap

The discharge tube consists of an electrically insulating cylindrical body and a pair of electrodes disposed facing each other in the cylindrical body, and is sealed with an inert gas. An activation layer of a silicate compound of alkaline metal is formed over at least a part of the inner wall surface and the electrode surface, other than the discharge surface, that are exposed to the sealed gas. This activation layer helps keep the discharge inception voltage stable even when the discharge frequency changes greatly, which in turn extends the longevity of the discharge tube.

Discharge tube with activation layer

An ignition system has a series-gap discharge-bulb through which a high voltage is supplied to a center electrode of an ignition plug. A short-circuit element is made of a material that reversibly deforms when it is heated to a predetermined temperature when an engine is operated in a steady state. The short-circuit element is electrically connected to the plug such that two discharging electrodes are short-circuited by the short-circuit element when the short-circuit element is heated to thermally deform. The discharging electrodes may be made of a reversibly deformable material so that the electrodes deform into contact with each other when they are heated to a predetermined temperature.

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Wako, Japan

Tetsuya Mitani