# US 2009/0261663 A1 · Linear motor and method of manufacturing the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2009/0261663 A1
- Document ID: US20090261663A1
- Status: Published application
- Kind: A1
- Application number: 12/088,556
- Filed: 2006-09-28
- Published: 2009-10-22
- Earliest claimed: 2005-09-28
- Assignees: Thk Co., Ltd.
- Inventors: Toshiyuki Aso; Shuhei Yamanaka; Kazuya Horiike; Taro Miyamoto; Yukitaka Ikeya; Tadao Yoneta
- Web page: https://patentgrep.com/patent/US20090261663A1

## CPC

- H02K 41/03: Synchronous motors; Motors moving step by step; Reluctance motors (H02K41/035 takes precedence)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

Provided is a linear motor capable of simplifying assembling of a coil unit and stabilizing a coil pitch and the overall length of the coil unit. The linear motor has a rod 1 having magnets 3, a plurality of coils 4 arranged in the axial direction of the rod 1, a housing 2 covering the coils 4, and a coil holder 5 holding the coils 4 in the housing 2. The coil holder 5 includes a holder main body 5a elongating in the coil arrangement direction and a plurality of spacer portions 5b made of resin and each interposed between each adjacent two of the coils 4 to insulate the coils 4 from each other, the spacer portions 5b being formed integrally with the holder main body 5a.

## Claims

### Claim 1

A linear motor for obtaining a thrust for linear movement with use of a magnetic field and coil carrying current, comprising:
a rod having magnets;
a plurality of coils surrounding the rod and arranged in an axial direction of the rod;
a housing covering the coils; and
a coil holder holding the coils in the housing, the coil holder having a holder main body elongating in a coil arrangement direction and a plurality of spacer portions made of resin and each interposed between each adjacent two of the coils, the spacer portions being formed integrally with the holder main body.

### Claim 2 (depends on 1)

The linear motor according to claim 1, further comprising an insulating substrate having a through hole for each of lead wires of the coils to pass through and a conductive pattern for wiring the coils.

### Claim 3 (depends on 2)

The linear motor according to claim 2, wherein the insulating substrate is a separate piece from the holder main body and mounted on the holder main body which has a wiring hole for each of the lead wires of the coils.

### Claim 4 (depends on 1, 2, 3)

The linear motor according to any one of claims 1 to 3, wherein
the holder main body comprises a pair of holder main bodies which are plate-shaped and arranged in respective sides of a center line of the coils so as to surround the coils, and
each of the holder main bodies has split spacer portions formed integrally therewith, and when the holder main bodies in pair are assembled, the split spacer portions constitutes the spacer portions in a ring shape.

### Claim 5

A method of manufacturing a linear motor having a rod with magnets and a plurality of coils surrounding the rod and arranged in an axial direction of the rod, and being configured to obtain a thrust for linear movement with use of a magnetic field of the magnets and current passing through the coils, comprising the steps of:
holding all the coils in a coil holder having a holder main body elongating in a coil arrangement direction and a plurality of spacer portions made of resin and each interposed between each adjacent two of the coils, the spacer portions being formed integrally with the holder main body; and
covering the coils with a housing.

### Claim 6 (depends on 5)

The method according to claim 5, further comprising the step of making each lead wire of the coils pass through a through hole of an insulating substrate having a conductive pattern formed for wiring the coils and connecting the lead wire to the through hole with solder.