Bobbin for bar antenna and bar antenna including bobbin

Patent metadata

Field	Value
Publication number	US-9997835-B2
Application number	US-201514861118-A
Country	US
Kind code	B2
Filing date	Sep 22, 2015
Priority date	Sep 25, 2014
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A bobbin for a bar antenna includes a core holding portion being configured to be mounted with a stick-shaped core, and a restriction portion being connected to the core holding portion, the restriction portion being configured to restrict a turned-back portion of a conductive wire from moving to a side where a lamination portion is positioned, the conductive wire forming the lamination portion by being wound to the core in a first direction in a longitudinal direction of the core, the turned-back portion serving as a portion being turned back in a second direction that is different from the first direction.

First claim

The invention claimed is:

1. A bobbin for a bar antenna, comprising:
a core holding portion being configured to be mounted with a stick-shaped core;
a conductive wire including a first layer and a second layer; and
a restriction portion being connected to the core holding portion, the restriction portion being configured to restrict a turned-back portion of the conductive wire from moving to a side where a lamination portion is positioned, the conductive wire forming the lamination portion by being wound to the core in a first direction in a longitudinal direction of the core, wherein
the turned-back portion is a portion of the conductive wire being turned back in a second direction that is different from the first direction so that the second layer of the conductive wire is wound on the first layer of the conductive wire;
the restriction portion includes a first restriction portion and a second restriction portion;
the first restriction portion and the second restriction portion are arranged to be spaced apart from each other in a transverse direction of the core;
the first restriction portion includes a first lamination side surface serving as a surface being formed at the side where the lamination portion is positioned, the first restriction portion includes a first restriction surface serving as a surface being positioned opposite to the first lamination side surface in the longitudinal direction of the core;
the second restriction portion includes a second lamination side surface serving as a surface being formed at the side where the lamination portion is positioned, the second restriction portion includes a second restriction surface serving as a surface being positioned opposite to the second lamination side surface in the longitudinal direction of the core; and
the first lamination side surface and the second lamination side surface are dislocated from each other by a length that is a half of the diameter of the conductive wire in the longitudinal direction of the core.

2. The bobbin for the bar antenna according to claim 1 , further comprising:
a core housing portion being formed with a space that is configured to contain the core; wherein
the core holding portion is connected to an end portion of the core housing portion in the longitudinal direction of the core; and
the restriction portion is formed at one of the core housing portion and the core holding portion.

3. The bobbin for the bar antenna according to claim 2 , wherein the core housing portion is formed with a plurality of grooves being positioned along a winding direction of the conductive wire.

4. A bar antenna, comprising:
a stick-shaped core;
a conductive wire being wound around the core, the conductive wire including a first layer and a second layer; and
a bobbin of the bar antenna including:
a core holding portion being mounted with the core; and
a restriction portion being connected to the core holding portion,
the restriction portion restricting a turned-back portion of the conductive wire from moving to a side where a lamination portion is positioned, the conductive wire forming the lamination portion by being wound to the core in a first direction in a longitudinal direction of the core, wherein
the turned-back portion is a portion of the conductive wire being turned back in a second direction that is different from the first direction so that the second layer of the conductive wire is wound on the first layer of the conductive wire;
the restriction portion includes a first restriction portion and a second restriction portion;
the first restriction portion and the second restriction portion are arranged to be spaced apart from each other in a transverse direction of the core;
the first restriction portion includes a first lamination side surface serving as a surface being formed at the side where the lamination portion is positioned, the first restriction portion includes a first restriction surface serving as a surface being positioned opposite to the first lamination side surface in the longitudinal direction of the core;
the second restriction portion includes a second lamination side surface serving as a surface being formed at the side where the lamination portion is positioned the second restriction portion includes a second restriction surface serving as a surface being positioned opposite to the second lamination side surface in the longitudinal direction of the core; and
the first lamination side surface and the second lamination side surface are dislocated from each other by a length that is a half of the diameter of the conductive wire in the longitudinal direction of the core.

5. The bar antenna according to claim 4 , further comprising:
a core housing portion being formed with a space that contains the core; wherein
the core holding portion is connected to an end portion of the core housing portion in the longitudinal direction of the core; and
the restriction portion is formed at one of the core housing portion and the core holding portion.

6. The bar antenna according to claim 5 , wherein the core housing portion is formed with a plurality of grooves being positioned along a winding direction of the conductive wire.

Assignees

• Aisin Seiki

Inventors

• Tabata Takehiro
• Kiriyama Hiroshi
• Tateishi Masashi

Classifications

• H01F27/2804

  Printed windings · CPC title

• H01Q7/08 Primary

  Ferrite rod or like elongated core · CPC title

• H01F5/02 Primary

  wound on non-magnetic supports, e.g. formers · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F27/325

  Coil bobbins (formers for coils in general H01F5/02) · CPC title