Molla a nastro ed assieme di molla a nastro e pastiglia freno

A band spring (1) shaped to be arranged straddling a brake disc to apply an elastic action on at least one brake pad (3) to bias it away from said brake disc; wherein * - said brake disc is adapted to rotate about a rotation axis which defines an axial direction, parallel to said rotation axis, a radial direction, orthogonal to said rotation axis, and a circumferential direction orthogonal to said axial direction and to said radial direction; * - said at least one brake pad (3) comprises a backing plate (31), which supports a friction material (32), said backing plate (31) comprising a plate edge which forms at least one thrust portion and a distinct at least one striker portion; * - said band spring (1) comprises a band-shaped spring body (4); * - said band spring (1) comprises at least three portions (5, 6 and 7) which are mutually distinct, i.e. * - a first coupling portion (5) adapted to couple said band spring to a caliper body; * - a second thrust portion (6) adapted to apply said elastic action on said thrust portion of said at least one brake pad (3) biasing said brake pad (3) at least away from said brake disc in an axial direction and in a radial direction; * - a third abutment portion (7) adapted to abut against said striker portion of said at least one brake pad (3) forming a support on an area of said striker portion which prevents any sliding of said second thrust portion (6) when the spring is subject to external actions; * - preventing said band spring (1) from permanently coupling with said at least one pad (3), avoiding a bilateral constraint in said second thrust portion (6) and third abutment portion (7) between said band spring (1) and said at least one pad (3).