Patent ID: 7617559

Claim:
A stem structure of a cleaning brush comprising: a stem including a first segment having a threaded hole and at least two tabs provided on a front end thereof; a fixing element having a threaded section; a brush element including a body; a through opening in the body, with the threaded section of the fixing element received in the through opening and screwed with said threaded hole; and at least two bores in the body, with said at least two tabs of said first segment of said stem inserted into said at least two bores of said body, wherein said stem includes a second segment, wherein between said first and second segments of said stem is attached an angle adjuster including a first receiving compartment, a gear chamber, a second receiving compartment, a button, a gear disc, a covering, and a connecting shaft; said first receiving compartment is disposed on one side of a front end of said second segment of said stein and includes a spring mounted therein; said gear chamber is affixed on another side of said first segment of said stem; said second receiving compartment is formed on another side of the front end of said second segment of said stern and includes a spring attached therein; said button is secured in said first receiving compartment and inserts through a bottom of said first receiving compartment; said gear disc acts between said gear chamber and said second receiving chamber, and an end portion of said button inserts through said gear disc; said connecting shaft is arranged in an outer periphery of said second receiving compartment and affixed at a center of said button.