Winding control method of seatbelt retractor and seatbelt device

• US 20050253012A1
• Filed: 05/10/2005
• Published: 11/17/2005
• Est. Priority Date: 05/13/2004
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Japan GK
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Tanaka, Koji, Takao, Masato, Inuzuka, Koji
• Granted Patent: US 7,397,208 B2
• Time in Patent Office: Days
• US Class Current: 242/390.900
• CPC Class Codes: B60R 2022/4473 using an electric retraction device combined with a spring B60R2022/444, B60R2022/4466
• CPC Class Codes: B60R 22/44 with means for reducing belt tension during use under normal conditions not included in the retractor B60R22/19; B60R22/3405 takes precedence

Abstract

A winding control method of a seatbelt retractor for winding a seatbelt with a motor includes detecting a current flowing through the motor, and stopping the motor when the current exceeds a predetermined value. The winding action is not stopped while the motor is accelerated even when the current exceeds the predetermined value.

Claims

1. A winding control method of a seatbelt retractor for winding a seatbelt with a motor, comprising:

detecting a current flowing through the motor, and

stopping the motor when the current exceeds a predetermined value,

wherein the motor is, not stopped while the motor is being accelerated even though the current exceeds the predetermined value.

4. A seatbelt device comprising the seatbelt retractor for winding the seatbelt with the winding control method according to claim 1.

2. A winding control method of a seatbelt retractor for winding a seatbelt with a motor, comprising:

detecting a current flowing through the motor, and

stopping the motor when the current exceeds a predetermined value,

wherein the motor is not stopped until a predetermined time period has passed after a voltage applied to the motor increases even though the detected current exceeds the predetermined value.

5. A seatbelt device comprising the seatbelt retractor for winding the seatbelt with the winding control method according to claim 2.

3. A winding control method of a seatbelt retractor for winding a seatbelt with a motor, comprising:

detecting a current flowing through the motor, and

stopping the motor when the current exceeds a predetermined value,

wherein an acceleration of the motor is controlled such that the current does not exceed the predetermined value.

6. A seatbelt device comprising the seatbelt retractor for winding the seatbelt with the winding control method according to claim 3.