Personal care device with pivotable treatment head

A personal care device with a treatment head being pivot-mounted around a pivot axis with respect to a body of the personal care device, the personal care device comprising:

• a pin having a pin head, the pin being provided at one of the treatment head or body;
• a cam element having a cam surface being provided at the other one of the treatment head or body;
• a spring element biasing the pin head and the cam surface against each other;
• wherein the pin head is in contact with the cam surface and the cam surface is shaped such that it defines a rest position at which a biasing spring force provided by the spring element with which the pin head and the cam surface are pushed against each other has a non-zero minimum value;
• wherein a pivoting of the treatment head around the pivot axis causes the pin head to move along the cam surface and the cam surface is further shaped such that the biasing spring force pushing the pin head and the cam surface against each other increases with increasing pivoting angle;
• and
• wherein the cam surface is defined by a function with respect to the pivot axis that is given the formula D(α)=D0−ΔD·(α/Δα), where D is the distance of a contact point of the pin head and the cam surface to the pivot axis, α is the pivot angle with respect to the rest position, D0 is the respective distance in the rest position, and ΔD, and Δα are parameters that define the slope of the function.