Cleaning section for an oral cleaning device

A system comprising:

• a cleaning section for an oral cleaning device, comprising a substrate, and an arrangement of cleaning elements carried by a surface of the substrate;
• wherein the arrangement is formed of cleaning elements from a set of at least two different categories of cleaning element, the cleaning elements of each category having at least one of a height, length or angular extension relative to the substrate surface different from the other category;
• wherein the arrangement of cleaning elements is composed of a plurality of arrangement units arrayed sequentially in a row along a longitudinal axis, each unit including a plurality of groups of cleaning elements, each cleaning element group comprising a plurality of cleaning elements of only one of the categories, and each unit having at least one group of each category of cleaning element,
• wherein each cleaning element group defines an elongate footprint on the substrate having an elongate length dimension which is perpendicular to said longitudinal axis, and wherein the cleaning element groups within each unit are arrayed sequentially along said longitudinal axis;
• wherein each cleaning arrangement unit has a total longitudinal width along the longitudinal axis,
• wherein the system further comprises an actuation mechanism for driving periodic motion of the arrangement of cleaning elements back and forth along a travel path oriented parallel to said longitudinal axis, and the travel path having a first end and a second end, a distance therebetween defining a stroke length, Δx, along the longitudinal axis;
• and
• wherein the plurality of arrangement units and the stroke length are configured such that for every arrangement unit,
• Δ
• ⁢
• x
• ≥
• 0.5
• ΔW_a
• where ΔW_a is a smallest longitudinal width section of a total longitudinal width of the respective unit that spans at least one group of each of the set of categories of cleaning element.