  A quantum mechanical picture is presented to describe the behavior of
confined spinons in a variety of S=1/2 chains. The confinement is due to
dimerization and frustration and it manifests itselfas a nonlinear potential
V(x)~ |x|^b, centered at chain ends (b <= 1) or produced by modulation kinks (b
> 1). The calculation extends to weak or zero frustration some previous ideas
valid for spinons in strongly frustrated spin chains. The local magnetization
patterns of the confined spinons are calculated. A (minimum) enhancement of the
local moments of about 11/3 over a single S=1/2 is found. Estimates for
excitation energies and binding lengths are obtained.
