公开(公告)号：US5056947A

公开(公告)日：1991-10-15

申请号：US563808

申请日：1990-08-06

申请人： Masuo Kubota ,  Hidehei Kageyama ,  Saburo Kobayashi ,  Yoshihide Mitsuya ,  Tadayoshi Ebinuma

发明人： Masuo Kubota ,  Hidehei Kageyama ,  Saburo Kobayashi ,  Yoshihide Mitsuya ,  Tadayoshi Ebinuma

IPC分类号： B43K24/14 ,  B43K27/00 ,  B43K27/02

CPC分类号： B43K27/02 ,  B43K24/146 ,  B43K27/003

摘要： In a writing utensil according to the present invention, when a rearward outer cylinder is rotated in either direction, a cam engaging projection, which is integral with the rearward outer cylinder, slides pressingly on either of the respective cam surfaces of first and second sliders. This causes one of the first and second sliders to advance, which in turn causes a first of the first and second refills to project forwardly while the other remains retracted. Similarly, when the rearward outer cylinder is rotated in the opposite direction, the cam engaging projection slides pressingly on the other of the cam surfaces of the first and second sliders. This causes advancement of the other of the sliders, and in turn causes the second of the first and second refills to be projected while the first remains retracted. The construction allows these operations to be smoothly, stably and positively performed.

公开(公告)号：US5074694A

公开(公告)日：1991-12-24

申请号：US607159

申请日：1990-10-31

申请人： Youichi Nakazato ,  Masuo Kubota ,  Shubei Kageyama ,  Yoshihide Mitsuya

发明人： Youichi Nakazato ,  Masuo Kubota ,  Shubei Kageyama ,  Yoshihide Mitsuya

IPC分类号： B43K24/08 ,  B43K25/02 ,  B43K5/16

CPC分类号： B43K25/026 ,  B43K24/082

摘要： Mechanism for putting the head of a shaft into and out of the head of an outer sleeve comprised of an outer sleeve (1), a long hole (2) formed in the outer sleeve (1), and a clip (3) to be put into and out of the outer sleeve (1) through the long hole (2). A shaft (4) is inserted in the outer sleeve (1), and a cam mechanism (8) cooperates with the clip (3) in a manner that causes the cam mechanism (8) to move forward and backward in an axial direction according to in and out movement of the clip (3). A spring (6) spring-biases the shaft (4) toward the cam mechanism.

公开(公告)号：US4973179A

公开(公告)日：1990-11-27

申请号：US336674

申请日：1989-04-12

申请人： Youichi Nakazato ,  Masuo Kubota ,  Shuhei Kageyama ,  Yoshihide Mitsuya

发明人： Youichi Nakazato ,  Masuo Kubota ,  Shuhei Kageyama ,  Yoshihide Mitsuya

IPC分类号： B43K24/08 ,  B43K25/02

CPC分类号： B43K25/026 ,  B43K24/082

摘要： Mechanism for putting the head of a shaft into and out of the head of an outer sleeve comprised of an outer sleeve (1), a long hole (2) formed in the outer sleeve (1), and a clip (3) to be put into and out of the outer sleeve (1) through the long hole (2). A shaft (4) is inserted in the outer sleeve (1), and a cam mechanism (8) cooperates with the clip (3) in a manner that causes the cam mechanism (8) to move forward and backward in an axial direction according to in and out movement of the clip (3). A spring (6) spring-biases the shaft (4) toward the cam mechanism.