Abstract

A staple hammering mechanism has a drive body (10), means for moving the drive body (10) upward, and means for preventing lowering of a lower arm (12) of the drive body. The drive body (10) is slidably attached to a structure body (4). One end of an upper arm (11) of the drive body is engaged with the inner wall of a handle (2), a blade (60) is attached to one end of the lower arm (12), and the one end of the upper arm (11) and the one end of the lower arm (12) are displaced in the direction in which they are separated from each other. Pressing down the handle (2) causes the upper arm (11) to lower, and while the lower arm (12) is engaged with an engagement body (40), force of the lowering is stored. When the upper arm (11) lowers to a predetermined position, the engagement between the lower arm (12) and the engagement body (40) is released and the stored force is released at one time to complete staple hammering.

IPC Classes  ?

• B25C 5/02 - Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor with provision for bending the ends of the staples on to the work
• B25C 5/11 - Driving means operated by manual power

Abstract

A stapler used to bind paper sheets etc., having a structure capable of accurately striking a staple with a small force. Pushing down a handle causes a trigger member (10) to move a puller member (20) backward, and the movement of the puller member causes a fulcrum (B) to move backward, causing an angle formed by a fulcrum (A), the fulcrum (B), and a fulcrum (C) of a toggle mechanism to approach 180°. This causes one end of a driver spring (30) to move upward to cause force to be accumulated in the driver spring. When the handle is further pushed down to release engagement between a head end A (12) of the trigger member and a stopper (22) of the puller member, force that moves the fulcrum B disappears. This makes the fulcrum B move forward, causing the fulcrum A to lower. As a result, a blade (35) attached to the one end of the driver spring is lowered to strike a staple.

IPC Classes  ?

• B25C 5/02 - Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor with provision for bending the ends of the staples on to the work
• B25C 5/11 - Driving means operated by manual power