Roller-type lateral force generation device

A roller-type lateral force generation device, providing a lateral force while a print apparatus transporting a paper along a paper-feeding direction, the roller-type lateral force generation device comprising:

• a roller having a main body and a roller shaft, wherein the roller shaft is penetrated through the main body and having a first shaft portion and a second shaft portion respectively at the two sides of the main body, and the second shaft portion has a penetration hole;
• a first plate disposed above the first shaft portion;
• a second plate disposed above the second shaft portion, wherein the second plate has an opening, and the opening is corresponded to the penetration hole;
• a connection plate connected with the first plate and the second plate, wherein the connection plate is disposed along a set direction, and the set direction is perpendicular to the paper-feeding direction;
• a first spring disposed between the first plate and the first shaft portion;
• a rotation shaft penetrated through the penetration hole;
• a second spring disposed between the second plate and the second shaft portion and sleeved around the rotation shaft;
• a fixing element partially penetrated through the opening, the rotation shaft and the second spring;
• and
• an adjustment element having a limitation plate, wherein the limitation plate is perpendicular to the first plate, the limitation plate has a limitation groove, and the first shaft portion is penetrated through the limitation groove,
• wherein the set direction and a connection line of the rotation shaft and the roller shaft have an angle larger than 0 degree, and the main body of the roller is pressed by the elastic power of the first spring and the second spring, so that the lateral force is generated while the paper being fed through the bottom of the roller.