Starter

Abstract

Provided is a starter which reliably cuts off any abnormal current caused to flow through the motor and which can reduce the possibility of current cutoff in the case of normal supply current. According to the present invention, a starter includes: a motor having a field coil; and an electromagnetic switch for supplying an electric current from a battery to the motor to start an engine through a pinion gear, in which: a metal conductor is connected to an upstream side of the field coil to which the electric current is supplied; and the metal conductor has a narrowed portion endowed with a fuse function and having a small sectional area.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings:

FIG. 1 is a sectional view of a starter according to Embodiment 1 of the present invention;

FIG. 2 is a circuit diagram of the starter of FIG. 1;

FIG. 3 is a perspective view of the starter of FIG. 1, with a motor case partially cut away to show a structure of the stator;

FIG. 4 is a developed view of the stator shown in FIG. 3; and

FIG. 5 is an enlarged view of a portion A of FIG. 4.

Claims

1. A starter comprising: a motor having a field coil; and an electromagnetic switch for supplying an electric current from a battery to the motor to start an engine through a pinion gear, wherein a metal conductor is connected to an upstream side of the field coil to which the electric current is supplied, and the metal conductor has a narrowed portion endowed with a fuse function and having a small sectional area.

2. A starter comprising: a motor having a field coil; and an electromagnetic switch for supplying an electric current from a battery to the motor to start an engine through a pinion gear, wherein a metal conductor is connected to an upstream side of the field coil to which the electric current is supplied, and the metal conductor is endowed with a fuse function and is composed of a material having a larger electrical resistance than the field coil.

3. A starter according to claim 2, wherein the metal conductor has a narrowed portion having a small sectional area.

4. A starter according to claim 1, wherein the field coil and the metal conductor are formed of copper.

5. A starter according to claim 2, wherein the field coil is formed of copper, and the metal conductor is formed of brass.