Patent ID: 8882352
Filing Date: 2014-11-11
Classification: F16C

Abstract:
1. A motion guide device, comprising: a track member having a ball rolling surface extending in a longitudinal direction thereof; a moving member main body having a load ball rolling surface that is opposed to the ball rolling surface to form a load ball path, and a ball return path provided in parallel to the load ball path; a lid member having a direction changing path that connects the load ball path and the ball return path to each other, the lid member being fixed to an end portion of the moving member main body in a moving direction thereof; and a plurality of balls arranged in an endless circulation path including the load ball path, the ball return path, and the direction changing path, wherein the lid member comprises an introducing portion at an entrance region of the direction changing path that is connected to the load ball path, wherein the introducing portion comprises: a first contact surface that is provided adjacent to one side portion of the ball rolling surface and continuous with the direction changing path so as to intersect with the load ball path, the first contact surface guiding the plurality of balls rolling on the ball rolling surface to another side portion of the ball rolling surface; and a second contact surface located on an opposite side to the first contact surface across the ball rolling surface, and wherein the plurality of balls are guided by the first contact surface so as to be transferred from the ball rolling surface of the track member onto the second contact surface.