| 摘要 |
A positioning drum for a Venetian blind has a cylinder, two sidewalls and a cord plate. The cylinder extends longitudinally and has two sides and an outer surface. The sidewalls are curved, extend respectively from the sides of the cylinder and each sidewall has a first edge. The cord plate is mounted between the first edges of the sidewalls and has a notch, two mounting holes, two channels and two secure posts. The notch is defined in the cord plate and has two longitudinal edges and a bottom. The mounting holes are defined in the cord plate near the bottom of the notch. The channels communicate respectively with the mounting holes and the notch. The secure posts are formed respectively on the longitudinal edges of the notch and each secure post has a distal end. The distal end extends toward and bars one of the channels.
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