Patent ID: 10197148

Abstract:
Since a second reinforcing rib (24e) protruding from a motor accommodating portion (24) to outside is provided to a portion formed with a weld line (WL) formed by the merger of molten resin (MR), the material thickness of the portion formed with the weld line (WL) can be increased. Therefore, the strength of the portion formed with the weld line (WL) is improved, and the strength of a case (21) as a whole can be improved. The case (21) sufficiently resistible to outer shocks can be achieved, and can be sufficiently used even in adverse environments such as a place near an undercarriage of a vehicle, and high reliability can be obtained. Since a small flange portion is provided on a caliper fixing portion side which supports an output shaft where large running torque is loaded, the weld line can be kept away from the caliper fixing portion, with this small flange portion taken as an inlet portion for the molten resin. Thus, with the caliper fixing portion side of the case inhibited from being distorted, it is possible to reliably inhibit unusual noise and so forth from occurring from an actuator.