Rotation mechanism and case assembly using the same

摘要

To provide a novel rotation mechanism having a smaller number of components or parts.;A double-sided tape applicator in which a rotation mechanism is incorporated includes a case and a closure 200 rotated relative to the case. A spiral sloped surface 212 is formed on a side of the closure 200. The case has an abutted member 131 provided at an end of a push member 130. When a user pushes the push member 130 to abut or compress the abutted member 131 against the sloped surface 212, the closure 200 is rotated.

主权项

1. A rotation mechanism for causing rotation of a second member relative to a first member, the first member including a connector part having either a pair of shaft rods each defining a rotation axis or a pair of bearings for receiving the corresponding shaft rods, the second member including a first arm and a second arm having the other of the pair of shaft rods or the pair of bearings, respectively, the first arm and the second arm straddling the connector part, the rotation of the second member relative to the first member being caused on the shaft rods;
the shaft rods and the bearings being adapted to attach the second member to the first member by inserting the shaft rods into the corresponding bearings with either the shaft rods or the bearings which are provided on or in the first and second arms of the second member being positioned outside of the other of the shaft rods or the bearings provided on or in the connector part of the first member; the first member having a push member provided on an outer side of the first arm, the push member being configured to be moved towards the first arm in a direction along a length of the shaft rods when a user applies a force to the push member; one of opposing surfaces of the push member and the first arm having a spiral sloped surface surrounding a predetermined region around the shaft rod on the axis of the shaft rod, the spiral sloped surface being sloped in the direction along the length of the shaft rods; the other of the opposing surfaces of the push member and the first arm having an abutted member that is abutted against the sloped surface; and the second member being rotated relative to the first member on the shaft rods as the abutted member slides along the sloped surface, with a pressure between the abutted member and the sloped surface increased as a result that a user moves the push member towards the first arm.