# US 12,009,130 B2 · Reactor

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- Number: US 12,009,130 B2
- Document ID: US12009130B2
- Status: Granted
- Kind: B2
- Application number: 17/295,651
- Filed: 2019-11-27
- Published: 2022-01-06
- Granted: 2024-06-11
- Earliest claimed: 2018-11-29
- Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Applicants: AutoNetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Inventors: Seiji Shitama; Akinori Ooishi; Kohei Yoshikawa; Naotoshi Furukawa; Kazuhiro Inaba
- Web page: https://patentgrep.com/patent/US12009130B2

## CPC

- H01F 27/02: Casings
- H01F 27/24: Magnetic cores
- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H01F 27/306: {Fastening or mounting coils or windings on core, casing or other support}
- H01F 27/324: {Insulation between coil and core, between different winding sections, around the coil; Other insulation structures}
- H01F 37/00: Fixed inductances not covered by group H01F17/00
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A reactor includes: a coil including a pair of winding portions arranged in parallel via a coupling portion; a magnetic core including inner core portions arranged inside the winding portions and a pair of outer core portions arranged outside the winding portions; a pair of holding members arranged so as to face end faces of the winding portions; and a molded resin portion covering at least a portion of outer peripheral surfaces of the outer core portions and fills spaces between inner peripheral surfaces of the winding portions and the inner core portions. The coil is a single continuous winding wire, the coupling portion is formed by bending back a portion of the winding wire, and one of the holding members on a side on which the coupling portion is arranged includes a recessed portion housing the coupling portion and an inward projection is arranged inside the coupling portion.

## Claims

### Claim 1

A reactor comprising:
a coil including a pair of winding portions arranged in parallel via a coupling portion;
a magnetic core including inner core portions arranged inside the winding portions and a pair of outer core portions arranged outside the winding portions;
a pair of holding members arranged so as to face end faces of the winding portions; and
a molded resin portion that covers at least a portion of outer peripheral surfaces of the outer core portions and fills spaces between inner peripheral surfaces of the winding portions and the inner core portions,
wherein the coil is constituted by a single continuous winding wire,
the coupling portion is formed by bending back a portion of the winding wire, and
one of the holding members on a side on which the coupling portion is arranged includes a recessed portion that houses the coupling portion and an inward projection that is arranged inside the coupling portion.

### Claim 2 (depends on 1)

The reactor according to claim 1, wherein in plan view of a face of the one holding member on a recessed portion side, a ratio of the area of the inward projection to the area of the recessed portion is greater than or equal to 50%.

### Claim 3 (depends on 1)

The reactor according to claim 1, wherein at a face of the one holding member on a recessed portion side, an end face of the inward projection is flush with a face of a remaining portion of the holding member excluding the recessed portion.

### Claim 4 (depends on 1)

The reactor according to claim 1, wherein the holding member is provided with a pair of through-holes into which end portions of the inner core portions are inserted,
the reactor further comprises inward interposing portions that project from peripheral edge portions of the through-holes toward interiors of the winding portions, and
the inward interposing portions are inserted between the winding portions and the inner core portions.

### Claim 5 (depends on 4)

The reactor according to claim 4, wherein at the peripheral edge portions of the through-holes of the one holding member, the inward interposing portions are provided only on a side where the recessed portion is provided.

### Claim 6 (depends on 2)

The reactor according to claim 2, wherein at a face of the one holding member on a recessed portion side, an end face of the inward projection is flush with a face of a remaining portion of the holding member excluding the recessed portion.

### Claim 7 (depends on 2)

The reactor according to claim 2, wherein the holding member is provided with a pair of through-holes into which end portions of the inner core portions are inserted,
the reactor further comprises inward interposing portions that project from peripheral edge portions of the through-holes toward interiors of the winding portions, and
the inward interposing portions are inserted between the winding portions and the inner core portions.

### Claim 8 (depends on 3)

The reactor according to claim 3, wherein the holding member is provided with a pair of through-holes into which end portions of the inner core portions are inserted,
the reactor further comprises inward interposing portions that project from peripheral edge portions of the through-holes toward interiors of the winding portions, and
the inward interposing portions are inserted between the winding portions and the inner core portions.