DRIVE DEVICE FOR OPENING/CLOSING BODY

摘要

An opening/closing-body drive device is achieved, in which a malfunction, caused by the electrical contacts of the relay switch freezing, can be reliably prevented from occurring. The control unit 60 includes a freeze determiner 61 which determines that the relay switch(es) is frozen when an opening/closing-body drive motor 27a does not drive a specified amount in accordance with opening/closing operational conditions of a back door 3 and when the temperature of the control unit 60 that is detected by a temperature detector 80 is lower or equal to a predetermined value; and a freeze releaser 62 which releases a frozen state of the relay switch(es) by intermittently supplying electric current for a predetermined number of times to the relay switch(es) without supplying a drive current to said opening/closing-body drive motor 27a, when said freeze determiner 61 determines that the relay switch(es) is frozen.

主权项

1. An opening/closing body drive device, comprising:
an opening/closing body which opens and closes an opening; an opening/closing-body drive motor, which drives said opening/closing body to open and close by a forward/reverse rotation of said opening/closing-body drive motor; a battery which generates drive current for said opening/closing-body drive motor; a supplier which supplies said drive current that is generated by said battery to said opening/closing-body drive motor; a switching device which switches the forward/reverse rotational direction of said opening/closing-body drive motor; a control unit which controls said supplier and said switching device based on opening/closing operational conditions of said opening/closing body; and a temperature detector which detects the temperature of said control unit, wherein at least one of said supplier and said switching device includes a relay switch, and wherein said control unit comprises:
a freeze determiner which determines that said relay switch is frozen when said opening/closing-body drive motor does not drive a specified amount in accordance with said opening/closing operational conditions of said opening/closing body and when the temperature of said control unit that is detected by said temperature detector is lower or equal to a predetermined value; anda freeze releaser which releases a frozen state of said relay switch by intermittently supplying electric current for a predetermined number of times to said relay switch without supplying a drive current to said opening/closing-body drive motor, when said freeze determiner determines that said relay switch is frozen.