Starter

Abstract

A starter includes a starter motor, a main circuit section, a main switch section including a main contact section to cut a current, a main plunger driven to open and close the main contact section, suction and holding coils, battery and motor terminals, and a switch terminal connected to the battery through a start switch, and opening and closing the main contact section in accordance with movement of the main plunger, a suction circuit section connected in parallel with the main circuit section and connected in series with the suction coil, a holding circuit section connected in series with the holding coil, and a breaking section connected in series with the suction coil inside the suction circuit section. The breaking section cuts electricity conduction when electricity is continuously conducted to the suction coil to bring about layer short circuit and a short circuit current flows at the suction circuit section.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an electric wiring diagram of a starter according to Embodiment 1 of the invention;

FIG. 2 is a half sectional view of a side face of the starter shown in FIG. 1;

FIG. 3 is a half side view of the starter according to Embodiment 1 of the invention;

FIGS. 4A to 4C illustrate constitution view s of a breaking section provided at the starter shown in FIG. 1;

FIGS. 5A and 5B are characteristic diagrams of the breaking section applied to the starter according to Embodiment 1 of the invention;

FIG. 6 is an electric wiring diagram of a starter according to Embodiment 2 of the invention;

FIG. 7 is a half sectional view of a side face of the starter shown in FIGS. 4A to 4C;

FIG. 8 is a half side view of the starter according to Embodiment 2 of the invention;

FIG. 9A to 9C illustrates constitution views of a breaking section provided at the starter according to Embodiment 2 of the invention; and

FIGS. 10A and 10B are a characteristic diagram of the breaking section applied to the starter according to Embodiment 2 of the invention.

Claims

1. A starter comprising a starter motor that is supplied with a current from a battery and generates a rotational force;a main circuit section that makes the current flow from the battery to the starter motor;a main switch section including:a main contact section that is provided at the main circuit section and cuts the current in the main circuit section;a main plunger that is driven to open and close the main contact section;a suction coil that generates a magnetic force to suck the main plunger;a holding coil that generates a magnetic force to hold the sucked main plunger;a battery terminal connected to the battery and constituting one fixed contact of the main contact section;a motor terminal connected to the starter motor and constituting other fixed contact of the main contact section; anda switch terminal that is connected to the battery through a start switch and conducts electricity to the suction coil and the holding coil, the main switch section opening and closing the main contact section in accordance with movement of the main plunger;a suction circuit section connected in parallel with the main circuit section and connected in series with the suction coil between the start switch and the motor terminal;a holding circuit section connected in series with the holding coil between the switch terminal and other end of the battery; anda breaking section that is connected in series with the suction coil inside the suction circuit section and cuts electricity conduction to the suction coil,wherein the breaking section cuts electricity conduction when electricity is continuously conducted to the suction coil to bring about layer short circuit and a short circuit current flows at the suction circuit section.

2. A starter comprising: a starter motor that is supplied with a current from a battery and generates a rotational force;a main circuit section that makes the current flow from the battery to the starter motor;a main switch section including:a main contact section that is provided at the main circuit section and cuts the current in the main circuit section;a main plunger that is driven to open and close the main contact section;a suction coil that generates a magnetic force to suck the main plunger;a holding coil that generates a magnetic force to hold the sucked main plunger;a battery terminal connected to the battery and constituting one fixed contact of the main contact section;a motor terminal connected to the starter motor and constituting other fixed contact of the main contact section; anda switch terminal that is connected to the battery through a start switch and conducts electricity to the suction coil and the holding coil, the main switch section opening and closing the main contact section in accordance with movement of the main plunger;a suction circuit section one end of which is connected to the battery terminal, other end of which is connected to the motor terminal and which is provided with the suction coil;a holding circuit section connected in series with the holding coil between the switch terminal and other end of the battery;an auxiliary switch section one end of which is connected to the battery terminal and other end of which is connected to the switch terminal, the auxiliary switch section including:an auxiliary contact section that cuts a current conducted to the auxiliary switch section;an auxiliary movable contact that opens and closes the auxiliary contact section; andan auxiliary suction coil that operates the auxiliary movable contact section;a start circuit section that includes the start switch connected in series with the auxiliary suction coil and conducts electricity from the battery to the auxiliary suction coil; anda breaking section electrically that is connected in series with the suction circuit section and cuts electricity conduction to the suction coil,wherein the breaking section cuts electricity conduction when electricity is continuously conducted to the suction coil to bring about layer short circuit and a short circuit current flows at the suction circuit section.

3. The starter according to claim 1, wherein the suction coil and the motor terminal are connected by a metal plate, andthe breaking section serves as the metal plate.

4. The starter according to claim 2, wherein the suction coil and the motor terminal are connected by a metal plate, andthe breaking section serves as the metal plate.

5. The starter according to claim 3, wherein in the breaking section, a width of a portion of the metal plate is formed to be narrower than a width of other portion.

6. The starter according to claim 4, wherein in the breaking section, a width of a portion of the metal plate is formed to be narrower than a width of other portion.

7. The starter according to claim 3, wherein the metal plate is formed by copper or brass.

8. The starter according to claim 4, wherein the metal plate is formed by copper or brass.

9. The starter according to claim 5, wherein the breaking section is provided with a hole portion, andthe hole portion is mounted with a metal having a melting temperature lower than a melting temperature of a material of the metal plate.

10. The starter according to claim 6, wherein the breaking section is provided with a hole portion, andthe hole portion is mounted with a metal having a melting temperature lower than a melting temperature of a material of the metal plate.

11. The starter according to claim 5, wherein the breaking section is covered by a cover on an outer side thereof.

12. The starter according to claim 6, wherein the breaking section is covered by a cover on an outer side thereof.

13. The starter according to claim 11, wherein the cover is made of a resin.

14. The starter according to claim 12, wherein the cover is made of a resin.

15. The starter according to claim 11, wherein the cover is fixed to the metal plate by a claw portion provided at the cover.

16. The starter according to claim 12, wherein the cover is fixed to the metal plate by a claw portion provided at the cover.

17. The starter according to any one of claim 11, wherein the cover covers all of a, distance between terminals of the metal plate.

18. The starter according to any one of claim 12, wherein the cover covers all of a distance between terminals of the metal plate.