| 摘要 |
Disclosed is a paddle shaft length adjustment device in which a connection end portion of a large-diameter first shaft is connected and secured to a connector pipe via simplified insertion to ensure easy assembly between the first shaft and the connector pipe, and a second shaft is secured by reducing the diameter of a contractible pipe portion of the resilient connector pipe, thereby allowing the length adjustment device to be repeatedly used with a paddle shaft formed of a non-elastic material, such as aluminum. The paddle shaft length adjustment device includes snap insertion holes perforated in the front and rear sides of a connection end portion of a tubular first shaft, a second shaft shaped to be inserted into the first shaft, a connector pipe consisting of, on the basis of a boundary wall formed at a middle position of an inner bore thereof, an expandable pipe portion at one side of the boundary, into which the connection end portion of the first shaft is inserted, and a contractible pipe portion at the other side of the boundary, into which the second shaft to be inserted into the first shaft is inserted such that an outer circumferential surface of the second shaft comes into close contact with an inner circumferential surface of the contractible pipe portion, the connector pipe having a longitudinal elongated slot perforated in the top of the contractible pipe portion, front and rear snap type retainers provided at the front and rear sides of the expandable pipe portion and configured to be snap fitted into the snap insertion holes perforated in the front and rear sides of the first shaft, and a clamping member provided at the contractible pipe portion of the connector pipe, the clamping member securing the second shaft to the contractible pipe portion by reducing the width of the elongated slot, and consequently reducing the diameter of the contractible pipe portion. |
| 主权项 |
1. A paddle shaft length adjustment device comprising:
snap insertion holes (2) perforated in the front and rear sides of a connection end portion of a first shaft (11) having a tubular shape; a second shaft (12) shaped to be inserted into the first shaft (11); a connector pipe (3) consisting of, on the basis of a boundary wall (31) formed at a middle position of an inner bore thereof, an expandable pipe portion (32) at one side of the boundary, into which the connection end portion of the first shaft is inserted, and a contractible pipe portion (33) at the other side of the boundary, into which the second shaft (12) to be inserted into the first shaft (11) is inserted such that an outer circumferential surface of the second shaft comes into close contact with an inner circumferential surface of the contractible pipe portion, the connector pipe having a longitudinal elongated slot (331) perforated in the top of the contractible pipe portion (33); front and rear snap type retainers (4) provided at the front and rear sides of the expandable pipe portion (32), the front and rear snap type retainers being configured to be snap fitted into the snap insertion holes (2) perforated in the front and rear sides of the first shaft (11); and a clamping member (5) provided at the contractible pipe portion (33) of the connector pipe (3), the clamping member securing the second shaft (12) to the contractible pipe portion (33) by reducing the width of the elongated slot (331), and consequently reducing the diameter of the contractible pipe portion (33). |
