Residual staple amount detection device of electric stapler

A staple remaining amount detecting apparatus in an electric stapler, used in an electric stapler comprising a staple cartridge provided attachably and detachably to and from a magazine portion of a stapler main body for containing a number of staples each in a straight form and wound in a roll-like shape, wherein the staples are successively guided out to outside of an opening portion of the cartridge main body from the staple at a front end portion, comprising:

• an engaging plate arranged at an upper portion of the cartridge main body and engaged with an upper end of the roll-like staple;
• and
• a position detecting mechanism for detecting a position of the engaging plate,
• wherein a remaining amount of the roll-like staples is detected based on the detection of the-position of the engaging plate by the position detecting mechanism,
• wherein the position detecting mechanism comprises a plurality of conductors and an output terminal provided at each of the conductors,
• wherein the engaging plate is provided with an electrode made to be movable along the conductors while being brought into contact with each of the conductors, and
• wherein the position of the engaging plate is detected based on a value of a voltage measured across the output terminals, and the remaining amount of the roll-like staples is detected based on the detection of the position of the engaging plate.

A staple remaining amount detecting apparatus in an electric stapler, used in an electric stapler comprising a staple cartridge provided attachably and detachably to and from a magazine portion of a stapler main body for containing sheet-like staples each constituted by connecting a number of staples in a straight form in a sheet-like shape in a stacked state, wherein the staples are guided out to outside of an opening portion of a lower end portion of a front wall of the cartridge main body successively from a lower end portion of the sheet-like staples, comprising:

• an engaging plate arranged at an upper portion of the cartridge main body and engaged with the sheet-like staple at a topmost portion;
• and
• a position detecting mechanism for detecting a position of the engaging plate,
• wherein a remaining amount of the sheet-like staples is detected based on the detection of the position of the engaging plate by the position detecting mechanism,
• wherein the position detecting mechanism provides an electrical signal based on the detection of the position of a projected portion of the engaging plate,
• wherein the position detecting mechanism comprises a plurality of conductors and an output terminal provided at each of the conductors,
• wherein the engaging plate is provided with an electrode made to be movable along the conductors while being brought into contact with each of the conductors, and
• wherein the position of the engaging plate is detected based on a value of a voltage measured across the output terminals, and the remaining amount of the sheet-like staples is detected based on the detection of the position of the engaging plate.

A staple remaining amount detecting apparatus in an electric stapler, used in an electric stapler comprising a staple cartridge provided attachably and detachably to and from a magazine portion of a stapler main body for containing a number of staples each in a straight form and wound in a roll-like shape, wherein the staples are successively guided out to outside of an opening portion of the cartridge main body from the staple at a front end portion, comprising:

• an engaging plate arranged at an upper portion of the cartridge main body and engaged with an upper end of the roll-like staple;
• and
• a position detecting mechanism for detecting a position of the engaging plate,
• wherein a remaining amount of the roll-like staples is detected based on the detection of the-position of the engaging plate by the position detecting mechanism,
• wherein the position detecting mechanism provides an electrical signal based on the detection of the position of a projected portion of the engaging plate,
• wherein the position detecting mechanism comprises a plurality of conductors and an output terminal provided at each of the conductors,
• wherein the engaging plate is provided with an electrode made to be movable along the conductors while being brought into contact with each of the conductors, and
• wherein the position of the engaging plate is detected based on a value of a voltage measured across the output terminals, and the remaining amount of the roll-like staples is detected based on the detection of the position of the engaging plate.