A head module (2) capable of reciprocating rotation used in an electric cleaning tool includes a cleaning element (21), a head module housing (22), and a hollow head module housing cavity (222) of the housing (22). ), And a hollow chamber (239) for housing the drive shaft (11) is provided on the driven rod (23), and the hollow chamber (239) is mounted on the driven rod (23). At least one driven rod notch (231) is provided in the surrounding region, and a corresponding driven rod protrusion (233) provided on the driven rod (23) is provided on the side wall of the housing cavity (222). At least one housing inner groove (221) for receiving is distributed and driven The rod (23) further includes a partial cylindrical chamber region or conical chamber region (238), wherein the diameter of the region (238) or the maximum diameter of the corresponding coupling portion of the region (238) is the cylinder of the drive shaft (11). Between the housing inner groove (221) and the driven rod protrusion (233) when the head module driven rod (23) is not inserted into the drive shaft (11), which is smaller than the diameter of the body region (113). Further, there is a gap (240) in a direction perpendicular to the drive shaft (11) rotation axis direction (L1), and the gap (240) is in a direction perpendicular to the drive shaft (11) rotation axis direction (L1). The length is greater than or equal to the amount of one-sided interference between the head module driven rod (23) and the drive shaft (11). [Selection] Figure 13電動クリーニング器具に使用される、往復回転可能なヘッド部モジュール（２）は、クリーニング素子（２１）と、ヘッド部モジュールハウジング（２２）と、ハウジング（２２）の中空のヘッド部モジュールハウジングキャビティ（２２２）中に位置するヘッド部モジュールドリブンロッド（２３）と、を含み、ドリブンロッド（２３）に、駆動軸（１１）を収納するための中空チェンバー（２３９）が設けられ、中空チェンバー（２３９）を囲む領域の中に、ドリブンロッド切り欠き（２３１）が少なくとも１つ設けられ、ハウジングキャビティ（２２２）の側壁上に、ドリブンロッド（２３）上に設けられる、対応されるドリブンロッド突起（２３３）を収容するためのハウジング内側溝（２２１）が少なくとも1つ分布され、ドリブンロッド（２３）は、一部円柱チェンバー領域または円錐チェンバー領域（２３８）をさらに含み、前記領域（２３８）の直径または当該領域（２３８）の対応する結合部分の最大直径は駆動軸（１１）円柱体領域（１１３）の直径より小さくて、駆動軸（１１）にヘッド部モジュールドリブンロッド（
