Abstract: An internal combustion engine ignition coil apparatus includes: a case; a center core disposed in the case; a primary coil and a secondary coil disposed outside the center core inside the case; a high-voltage cord having: a first end portion electrically connected to the secondary coil; and a second end portion electrically connected to a spark plug; and a protective tube covering an outer peripheral surface of the high-voltage cord, a rim portion projecting away from a high-voltage terminal being formed so as to surround an insertion aperture in a bottom portion of the case, and a leading end portion of the protective tube covering and elastically engaging with the rim portion, wherein: a receiving portion having a radially-outwardly-projecting V-shaped cross-sectional shape when sectioned axially is formed on an end portion of the rim portion.

Abstract: An ignition coil apparatus for an internal combustion engine can suppress an increase in the manufacturing cost of a terminal of a low-tension side connector resulting from variation in a wire diameter of an one end of a primary winding, and can ensure a stable fusing state. The positive terminal side fusing portion is composed of a planar portion and a turned portion that is inversely turned back from the planar portion to cooperate therewith to clamp a winding start conductor portion. A first bent portion of a radius of curvature R is formed at a base end portion of the turned portion. A second bent portion with its tip end tilted toward a planar portion is formed at an intermediate portion of the turned portion.

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: An internal combustion engine ignition coil apparatus includes: a case; a center core disposed in the case; a primary coil and a secondary coil disposed outside the center core inside the case; a high-voltage cord having: a first end portion electrically connected to the secondary coil; and a second end portion electrically connected to a spark plug; and a protective tube covering an outer peripheral surface of the high-voltage cord, a rim portion projecting away from a high-voltage terminal being formed so as to surround an insertion aperture in a bottom portion of the case, and a leading end portion of the protective tube covering and elastically engaging with the rim portion, wherein: a receiving portion having a radially-outwardly-projecting V-shaped cross-sectional shape when sectioned axially is formed on an end portion of the rim portion.

Abstract: An ignition coil apparatus for an internal combustion engine can suppress an increase in the manufacturing cost of a terminal of a low-tension side connector resulting from variation in a wire diameter of an one end of a primary winding, and can ensure a stable fusing state. The positive terminal side fusing portion is composed of a planar portion and a turned portion that is inversely turned back from the planar portion to cooperate therewith to clamp a winding start conductor portion. A first bent portion of a radius of curvature R is formed at a base end portion of the turned portion. A second bent portion with its tip end tilted toward a planar portion is formed at an intermediate portion of the turned portion.

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: Power generation efficiency of a magneto generator is improved. A guard ring 13 made of a material of high magnetic permeability such as carbon steel plate is arranged inside a flywheel 11 for the purpose of holding and guarding magnets 12. the guard ring 13 is provided with opening portions 13a at positions where the guard ring 13 coincides with adjacent two end portions of the neighboring magnets 12. Magnetic flux is prevented from flowing into the neighboring magnets 12 through the guard ring 13 at the time of power generation. The magnetic flux flows into an iron core of a magneto coil 16, and generation efficiency is effectively improved.

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the magneto-generator being enhanced. The magneto-generator is manufactured by making use of a resin molding die (21) having an outer peripheral surface (21d) to be positioned in opposition to an inner peripheral surface of a flywheel (11) and projections (21a) provided in the outer peripheral surface (21d) for holding a plurality of magnets (12) at predetermined positions, respectively. The magnets (12) are positioned and held stationarily at predetermined positions by the aforementioned projections, respectively, and spaces defined between the resin molding die (21) and the inner peripheral surface of the flywheel (11) are filled with a resin. After hardening of the resin, the resin molding die (21) is detached from the flywheel (11).

Abstract: Ventilation efficiency inside a flywheel is improved. Plural vent holes 16 are formed on a side wall portion of a flywheel 11 formed by a circumferential wall portion and the side wall portion on one end side of the circumferential wall portion, and fins 17 protruding toward inside of the flywheel 11 are formed between the neighboring vent holes 16. The fins 17 are formed integrally at the time of filling with a resin 14 with which a space between a guard ring 13 for guarding plural magnets 12 arranged inside the circumferential wall portion of the flywheel 11 and the flywheel 11 is filled, and the magnets 12 are embedded in the resin 14. In generating electric power, the fins 17 rotate synchronously with the flywheel 11, a negative pressure is generated at the vent hole 16 portions, and outside air is introduced into the flywheel 11 and ventilation is performed.

Abstract: Power generation efficiency of a magneto generator is improved. A guard ring 13 made of a material of high magnetic permeability such as carbon steel plate is arranged inside a flywheel 11 for the purpose of holding and guarding magnets 12. the guard ring 13 is provided with opening portions 13a at positions where the guard ring 13 coincides with adjacent two end portions of the neighboring magnets 12. Magnetic flux is prevented from flowing into the neighboring magnets 12 through the guard ring 13 at the time of power generation. The magnetic flux flows into an iron core of a magneto coil 16, and generation efficiency is effectively improved.

Abstract: Ventilation efficiency inside a flywheel is improved. Plural vent holes 16 are formed on a side wall portion of a flywheel 11 formed by a circumferential wall portion and the side wall portion on one end side of the circumferential wall portion, and fins 17 protruding toward inside of the flywheel 11 are formed between the neighboring vent holes 16. The fins 17 are formed integrally at the time of filling with a resin 14 with which a space between a guard ring 13 for guarding plural magnets 12 arranged inside the circumferential wall portion of the flywheel 11 and the flywheel 11 is filled, and the magnets 12 are embedded in the resin 14. In generating electric power, the fins 17 rotate synchronously with the flywheel 11, a negative pressure is generated at the vent hole 16 portions, and outside air is introduced into the flywheel 11 and ventilation is performed.

Abstract: An ignition device for an internal combustion engine comprises an ignition coil unit including a core a primary coil wound around said core, a secondary coil electro-magnetically coupled to the primary coil, a case for housing the core, the primary coil and the secondary coil therein, and control circuit for controlling a current flowing the primary coil. In the ignition device, the control circuit is housed in the case so that heat generated by said control circuit is transferred to the case to radiate out the heat.

Abstract: An ignition coil unit for an internal combustion engine comprising a magnetic iron core, a primary coil wound around the iron core, a secondary coil electromagnetically coupled with the primary coil, a control circuit for controlling a primary electric current, and a case containing the iron core, the primary coil, the secondary coil and the control circuit therein. The ignition coil unit may further comprise a heat sink attached to the iron core, and the mold case may contain and integrally support the iron core and the heat sink, with at least part of the heat sink exposed to exterior of the mold case. The mold case defines a cavity containing therein the primary coil and the secondary coil wound around the iron core, and the space around the primary and second coils within the cavity is filled by a resin material.

Abstract: The invention relates to an ignition coil for use in an ignition apparatus of an internal combustion engine. For the purpose of miniaturization of the apparatus, a high voltage terminal (13) is integrally constructed by insertion molding the high voltage terminal to a bobbin (11) of a secondary coil portion (10). One end of a secondary winding (12) in the secondary coil portion (10) is soldered and connected to a connecting portion (13a) of the high voltage terminal (13). A projecting portion (11b) of the bobbin (11) is inserted into an engaging portion (14b) of a casing (14). Soldering of the high voltage terminal (13) and secondary winding (12) in the casing (14) is thus unnecessary, allowing the casing (14) to be miniaturized.

Abstract: A high-voltage transformer is provided which includes a primary coil and a secondary coil disposed in a coil case, and a support member attached to the coil case and having a high-voltage terminal for electrically connecting a lead wire of the secondary coil with an external electrical device. The primary and secondary coil are first accommodated in the coil case, and the lead wire of the secondary coil is temporarily connected with the high-voltage terminal while the support member is separated from the coil case and freely moved to an appropriate location. Then, the lead wire of the secondary coil thus temporarily connected is soldered to the high-voltage terminal. Thereafter, the support member having the high-voltage terminal thus soldered to the secondary coil lead wire is attached to the coil case. Finally, a resin is filled into the coil case so as to firmly secure the primary and secondary coils and the support member to the coil case.

Abstract: A housing structure of an ignition coil assembly for an internal combustion engine is disclosed, in which the coil assembly and the igniter are accommodated in a single casing. The coil assembly is wound around a leg of a rectangular core having a yoke portion running parallel to it. The casing accommodates the coil assembly and the leg of the core carrying it, leaving exposed to the outside the yoke of the core; a space is formed between a side of the coil assembly and a side wall of the casing. A plate-shaped heat sink abutting on the yoke of the core at its lower end extneds witin the casing between the coil assembly and the casing through said space, forming within the space a hollow receptacle between opposing surfaces of the coil assembly and the casing. The igniter is mounted to the heat sink within the hollow receptacle. The housing structure is attached to the body of an automobile, etc., at a surface of the heat sink abutting on the yoke of the core.