| 摘要 |
A pressure roller of tape-feed mechanism compises a bushing, two layers of elastic material, one of which is applied on outer cylindrical surface of the bushing, and ring spring made with radial slots and mounted between the layers of elatic material. Hardness of material of first layer between the bushing and ring spring is less than hardness of second layer material. The ring spring mounted between both layers of elastic material has barrel-like shape, and rounded radius of outer barrel-like surface thereof is equal to maximum diameter in the middle part. |
