Lead propelling device

A lead propelling device for releasing lead by a lead gripping means by knock operation and gripping the lead by said lead gripping means when the knock operation is canceled, comprising:

• a shaft tube having a leading end hole,
• a slider projecting from the leading end hole at the tip of the leading end of said shaft tube, said slider movable forward and backward and having an inner hole,
• a knock operation means connected to and movable with said slider,
• an elastically dislocatable stopper fixed in the inner hole of said slider for blocking insertion of the lead unless the lead is pushed by a minimum predetermined pressing force, the slider being biased backward by a spring so as to interlock with a lead case, said lead case having a step and said lead case being movable with said slider,
• a lead gripping means provided behind said slider, said lead gripping means having a rear part, said lead gripping means composed so as to grip or release the lead by departing or abutting between a step of said rear part of said lead gripping means and a step of said lead case,
• wherein said lead gripping means is adapted to grip the lead until said knock operation part is advanced by a predetermined distance,
• wherein when said knock operation means is further advanced from the predetermined distance, said slider and said lead gripping means advance in conjunction with said lead case, and said lead gripping means releases gripping of the lead, the lead may gravitationally fall against said stopper rear end, and
• when said knock operation means is subsequently moved backward by cancellation of the knock operation, said slider and said lead gripping means retreat, and when said lead gripping means grips the lead, only said slider moves backward to the initial position and the lead passes through said stopper, so that the lead is projected from the leading end of said slider by a predetermined length.

A lead propelling device for releasing the lead by a lead gripping means by knock operation and gripping the lead by said lead gripping means when the knock operation is canceled, comprising:

• a shaft tube having a leading end hole,
• a slider projecting from said leading end hole at the tip of the leading end of said shaft tube, said slider movable forward and backward and having an inner hole,
• a knock operation means connected to and movable with said slider,
• an elastically dislocatable stopper fixed in the inner hole of said slider for blocking insertion of the lead unless the lead is pushed by a minimum predetermined pressing force, the slider being biased backward by a spring so as to interlock with a lead case by way of a link unit,
• a lead gripping means is provided on a rear portion of the slider in a state of gripping the lead, and
• said lead gripping means maintains the lead gripping state when knock operation is started, said slider advances in conjunction with said lead case by way of said link unit, the lead is departed from said stopper rear end by a predetermined distance when said slider advances to the maximum and the advance is blocked, and when the knock operation further continues said link unit contracts and said lead case advances, thereby releasing the lead by said lead gripping means, the lead abuts against the stopper rear end by spontaneous fall of the lead, and when knock operation is canceled, said lead gripping means grips the lead while said slider maintains the foremost position, and said slider retreats to the initial position, and the lead passes through said stopper, so that the lead is projected from the leading end of said slider by a predetermined length.