Cartridge for automatic pencil

An automatic-pencil cartridge, comprising:

• lead automatic compensation means, disposed in a front section of the cartridge, for automatically outputting lead when depressed, said lead automatic compensation means including:
• a lead-protecting element;
• a damping ring which is disposed in said lead-protecting element;
• and
• a front spring, one end of which abuts the lead protecting element;
• lead holding means disposed in a middle section of the cartridge for delivering lead to an exit of the cartridge, said lead holding means including:
• a locking element which moves forward and backward and in which locking element a central hole is formed, said central hole having a tapered section at one end thereof;
• and
• a holding element which is arranged in said locking element and which holding element engages with the tapered section of said locking element, said holding element having a central hole in which central hole a tapered surface is provided, wherein another end of said front spring abuts said holding element;
• lead storing means disposed in a back section of the cartridge for storing the lead and opening said holding element, said lead storing means including:
• a lead guiding tube fixedly mounted in said lead storing means which lead guiding tube extends into the central hole of said holding element and cooperates with the tapered surface of said holding element so that said holding element is opened when the tapered surface is pressed by said lead guiding tube;
• a lead entering tube which fixedly and partially encases said lead guiding tube, said lead entering tube comprising a thick section and a thin section, a shoulder being formed between the thick section and the thin section;
• and
• a lead storing tube which fixedly encases the thin section of said lead entering tube;
• and
• cup means for enclosing said lead automatic compensation means and said lead holding means, and which receives said lead storing means at a back section of the cup means, and in which the locking means can slide therealong, including:
• a retaining element to enclose a front end of the cup means and which provides an outer surface of the cartridge with a shoulder, said lead protecting element extending out of said retaining element.

An automatic pencil cartridge, comprising:

• a tip element through which a lead is fed, said tip element including a damping ring for frictionally retaining said lead;
• lead holding means arranged axially behind said tip element, said lead holding means including an interior part and an exterior part, said interior part being axially movable with respect to said exterior part from a first relative position wherein said interior part frictionally retains said lead to a second relative position wherein said lead is not frictionally retained by said interior part;
• lead storing means arranged axially behind said lead holding means, said lead storing means including a lead guiding tube fixedly mounted in said lead storing means,
• said interior part of the lead holding means includes a central hole having a tapered end in alignment with said lead guiding tube;
• and
• said lead guiding tube includes means for engaging said tapered end to retain said lead holding element in the second relative position to permit axial shifting of the lead with respect to said lead holding element while said lead guiding tube is disposed within the central hole of the interior part while the lead storing means is retracted axially with respect to the lead and while said damping ring frictionally retains a position of said lead with respect to the tip element.

An automatic pencil cartridge, comprising:

• a tip element through which a lead is fed, said tip element including a damping ring for frictionally retaining said lead;
• lead holding means arranged axially behind said tip element, said lead holding means including an interior part and an exterior part, said interior part being axially movable with respect to said exterior part from a first relative position wherein said interior part frictionally retains said lead to a second relative position wherein said lead is not frictionally retained by said interior part;
• lead storing means arranged axially behind said lead holding means, said lead storing means including a lead guiding tube fixedly mounted in said lead storing means;
• said interior part of the lead holding means includes a central hole having a tapered end in alignment with said lead guiding tube;
• said lead guiding tube includes means for engaging said tapered end to retain said lead holding element in the second relative position to permit axial shifting of the lead with respect to said lead holding element while said lead guiding tube is disposed within the central hole of the interior part while the lead storing means is retracted axially with respect to the lead and while said damping ring frictionally retains a position of said lead with respect to the tip element;
• an extending tube fixedly connected with the exterior part and having an annular projection on an inner surface of the extending tube;
• said lead storing means further including a lead entering tube which encases said lead guiding tube, and has a thicker portion and a thinner portion, wherein the thicker portion has a groove which cooperates with the annular projection of the extending tube;
• and
• said lead entering tube further including shoulder means, separating said thicker portion and said thinner portion, for abutting with the annular projection to maintain the lead holding means in the second relative position while the lead storing means is retracted axially with respect to the lead.