Patent Publication Number: US-7721929-B2

Title: Staple cartridge

Description:
This is a continuation application of copending application Ser. No. 10/495,551 filed on May 14, 2004, which is hereby incorporated by reference. 

   TECHNICAL FIELD 
   The present invention relates to a staple cartridge used in an electric stapler. Particularly, the invention relates to a staple cartridge promoting operability in refilling staples, a staple cartridge and a staple guide and a staple feed claw of the staple cartridge facilitating to deal with jamming. 
   BACKGROUND ART 
   There is known an electric stapler using a staple cartridge containing a linear staple. Staple sheets adhered with linear staples in parallel with each other are stacked to contain in a staple cartridge. The linear staple is formed to U-shape by a forming plate of an electric stapler and injected by a driver. 
   In a conventional art, when staples at inside of the staple cartridge have been consumed up, a whole of the staple cartridge is replaced, generally. However, a staple cartridge capable of refilling staple sheets has been spread, in order to achieve saving of resources and a reduction in wastes. A staple cartridge of this kind is formed to be able to refill staple sheets provided for refilling, by opening an upper cover or a lower face cover of a staple containing portion. However, when the staples are refilled to the staple cartridge, there is taken time and labor of removing the staple cartridge from the electric stapler and opening a cover of the staple cartridge and after charging the staple sheets thereto, closing the cover and setting the staples to the electric stapler and there poses a problem that the operation is devoid of swiftness. 
   Further, the staple cartridge for the electric stapler of the background art is formed to inject staples by passing a driver of the electric stapler through a clearance between a face plate attached to a front portion of the staple cartridge and a staple guide provided at a front end face of a staple cartridge main body. Therefore, when the staple is buckled to clog at inside of a path of the driver, there is needed a processing procedure of firstly removing an outer cabinet of the electric stapler, or when the electric stapler is included in a copier, opening a cover of the copier, removing the staple cartridge from the electric stapler, opening the front end face of the staple cartridge main body by pivoting or sliding the face plate attached to the staple cartridge and thereafter, removing the staple locked at inside of the driver path, and time and labor is taken for recovery thereof. 
   Further, there is a copier including the electric staplers for simultaneously binding a plurality of locations of paper by a plurality of the electric staplers and there is a copier successively binding a plurality of locations of paper by moving a single piece of the electric stapler by a feed mechanism. In the case of a copier constituted to dispose a copy face of paper on a lower side to stack on a sheet table for convenience of collation, in order to penetrate the staple into a bunch of paper to be stapled, a driver unit of the electric stapler is arranged on the lower side of the sheet table and a clincher unit is arranged on an upper side of the sheet table. A staple guide of the driver unit is brought into contact with a paper face by being brought into a hole formed at the sheet table on the lower side, the clincher unit on the upper side is moved down to pinch paper on the sheet table along with the staple guide and a leg portion of the staple penetrating paper from the lower side is folded by the clincher. 
   In this way, in order to pinch paper on the sheet table by the staple guide and the clincher unit of the driver unit, there is constructed a constitution of advancing the staple guide into the hole of the sheet table, forming a long hole in a lateral direction of the sheet table in the case of a copier of laterally moving a single piece of the electric stapler by the feed mechanism and moving the staple guide of the driver unit at inside of the long hole. Therefore, when paper is fed to the sheet table after having been processed by a copying step, there is a case of bringing about a failure in feeding paper by catching a front edge portion of paper by the long hole of the sheet table. Further, by using the long hole at the sheet table, bending strength of the sheet table is reduced and therefore, it is preferable to reduce a dimension of the hole as small as possible. 
   DISCLOSURE OF THE INVENTION 
   Hence, with regard to the above-described technical problem to be resolved, it is a first object of the invention to be able to easily and swiftly carrying out operation of refilling a staple to a staple cartridge. 
   Further, it is a second object of the invention to be able to simply removing a staple clogged at a driver path. 
   Further, it is a third object thereof to be able to move an electric stapler without forming a long hole at a sheet table. 
   The invention is proposed in order to achieve the above-described object and provides a staple cartridge constituted to be a staple cartridge attachable and detachable to and from a cartridge containing chamber of an electric stapler and a staple cartridge formed to be capable of charging a staple pack laminating to contain staple sheets adhered with linear staples in parallel with each other, wherein an opening portion is formed at a side face of the staple containing chamber of the staple cartridge, the opening portion is provided with an openable and closable door and a staple pack is made to be chargeable by opening the door in a state of charging the staple cartridge to the cartridge containing chamber of the electric stapler. 
   Further, the invention provides the staple cartridge, wherein the opening is arranged in a direction the same as a direction of an opening portion of the cartridge containing portion of the electric stapler in the state of charging the staple cartridge to the cartridge containing portion of the electric stapler. 
   Further, the invention provides the staple cartridge, wherein the door is a slide door slidable in an up and down direction and the slide door is urged to a closing position by a spring. 
   Further, the invention provides the staple cartridge constituted such that a door is a slide door slidable in an up and down direction, an end portion of a pressing plate brought into elastic contact with a staple sheet is projected to a path of moving the slide door in the staple cartridge and when the slide door is opened, the slide door is engaged with the pressing plate and the pressing palate is escaped from the opening portion. 
   Further, in order to achieve the above-described object, the invention provides a staple cartridge constituted to be a cartridge attachable and detachable to and from a cartridge containing chamber of an electric stapler and a staple cartridge formed to be able to charge a staple pack laminated to contain staple sheets adhered with linear staples in parallel with each other, comprising a staple guide for guiding a driver of the electric stapler at a face of a feeding outlet side of the staple sheet, wherein a driver path is constituted by opposing the staple guide to a face plate arranged at inside of the cartridge containing chamber of the electric stapler. 
   Further, the invention provides the staple cartridge arranged with a magnet at a vicinity of the staple guide of the staple cartridge and formed such that the staple at inside of the driver path is adsorbed to the magnet. 
   Further, in order to achieve the above-described object, the invention provides a staple cartridge constituted to be a staple cartridge used for an electric stapler provided with a staple guide capable of being projected in a direction of injecting a staple from inside of the staple cartridge at a front end portion of the staple cartridge, a drive mechanism of the electric stapler and a cooperatively moving mechanism for cooperatibly moving the staple guide, wherein in a stapling operation, the staple guide is projected in the direction of injecting the staple from inside of the staple cartridge and in finishing the stapling operation, the staple guide is escaped to inside of the staple cartridge. 
   Further, the invention provides a staple cartridge wherein the cooperatively moving mechanism is constituted by the staple guide attached to the staple cartridge via a leaf spring and a slider moved to reciprocate in a front and rear direction by a mechanism of driving the electric stapler and when the slider is moved forward, the staple guide is projected in the direction of injecting the staple from inside of the staple cartridge by pushing the leaf spring disposed in a moving path of the slider. 
   Further, the invention provides the staple cartridge constituted such that a feed claw is attached to the slider via a leaf spring and the feed claw is engaged with the staple sheet or moved to slide on the staple sheet in accordance with a feed load. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a staple cartridge and an electric stapler showing an embodiment of the invention. 
       FIG. 2  is a perspective view showing the staple cartridge in a state of opening a slide door. 
       FIG. 3  is a perspective view of a state of mounting the staple cartridge to the electric stapler. 
       FIG. 4  is a perspective view showing a state of charging a staple to the staple cartridge. 
       FIG. 5  is a perspective view of the staple cartridge and the electric stapler showing an embodiment of the invention. 
       FIG. 6  is a perspective view showing the staple cartridge in a state of opening the slide door. 
       FIG. 7  is a perspective view of a state of mounting the staple cartridge to the electric stapler. 
       FIG. 8  is a perspective view showing a state of charging a staple to the staple cartridge. 
       FIG. 9  is a side sectional view of a driver unit and the staple cartridge. 
       FIG. 10  is a view of assembling a staple cartridge. 
       FIG. 11  is a perspective view of the staple cartridge and the electric stapler showing an embodiment of the invention. 
       FIG. 12  is a perspective view of a state of opening a slide door showing a staple cartridge. 
       FIG. 13  is a perspective view of a state of mounting the staple cartridge to a driver unit of the electric stapler. 
       FIG. 14  is a perspective view showing a state of charging a staple to the staple cartridge. 
       FIG. 15  is a side sectional view of a state of mounting the staple cartridge to a driver unit of the electric stapler. 
       FIG. 16  is a perspective view showing a relationship between the staple cartridge and a staple feed mechanism of the driver unit. 
       FIG. 17  is a perspective view of a state in which the staple cartridge is at standby. 
       FIG. 18  is a perspective view showing a state of the staple cartridge immediately before striking a staple. 
       FIG. 19  is a perspective view showing a state of the staple cartridge in striking the staple. 
   

   Further, in notations of the drawing, numeral  103  designates a staple cartridge, numeral  104  designates an opening portion, numeral  105  designates a guide rail portion, numeral  106  designates a slide door, numeral  107  designates a tension coil spring, numeral  108  designates a compression coil spring, numeral  109  designates a pressing plate, numeral  121  designates a staple pack, numeral  122  designates a staple sheet, numeral  201  designates a driver unit, notation  201   a  designates a driver, numeral  203  designates a staple cartridge, numeral  204  designates an opening portion, numeral  205  designates a guide rail portion, numeral  206  designates a slide door, numeral  207  designates a tension coil spring, numeral  208  designates a compression coil spring, numeral  209  designates a pressing plate, numeral  211  designates a leaf spring, numeral  212  designates a staple guide, numeral  213  designates a face plate, numeral  214  designates a slider, numeral  215  designates a leaf spring, numeral  216  designates a feed claw, numeral  222  designates a guide table, numeral  223  designates a magnet, numeral  224  designates a front face cover, numeral  303  designates a staple cartridge, numeral  304  designates an opening portion, numeral  305  designates a guide rail portion, numeral  306  designates a slide door, numeral  307  designates a tension coil spring, numeral  308  designates a compression coil spring, numeral  309  designates a pressure plate, numeral  311  designates a leaf spring, numeral  312  designates a staple guide, numeral  313  designates a slider, numeral  314  designates a leaf spring, numeral  315  designates a feed claw, numeral  316  designates an arm, numeral  317  designates a groove, numeral  341  designates a sheet table, and numeral  342  designates a hole. 
   DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   A detailed description will be given of a first embodiment of the invention in reference to  FIG. 1  through  FIG. 4  as follows. In  FIG. 1 , numeral  101  designates a driver unit of an electric stapler which is arranged at inside of a copier (not illustrated) in an attitude reversing a normal attitude in an up and down direction in view of a relationship with a print face of the copier and injects a staple from the driver unit  101  to a clincher unit (not illustrated) on an upper side. The staple cartridge  103  attachable and detachable to and from a cartridge containing portion  102  of the driver unit  101  is formed with the opening portion  104  at a rear face thereof and the slide door  106  is engaged with the guide rail portion  105  in a vertical direction formed at rear ends of two left and right side faces thereof. The slide door  106  is pulled up to an upper side by the tension coil spring  107  made to span upper portions of the two left and right side faces of the staple cartridge  103  and the slide door  106 . Further, inside of the staple cartridge  103  includes a pressing plate, mentioned later, the pressing plate is pushed up to the upper side by the compression coil spring  108  installed at an inner bottom face thereof. A groove (not illustrated) is formed at a lower end portion of a center of a front face face on a side of inside of a cartridge) of the slide door  106 , a rear end portion of the pressing plate is projected to a position of the groove and when the slide door  106  is pushed down to a lower side as shown by  FIG. 2 , the rear end portion of the pressing plate  109  is engaged with the groove and also the pressing plate  109  is moved down simultaneously as shown by the drawing. 
     FIG. 3  shows a state of mounting the staple cartridge  103  to the driver unit  101  of the electric stapler, numeral  121  designates the staple pack made of paper for refilling, and a predetermined number of sheets of the staple sheets  122  are stacked to be contained in the staple pack  121 . In the drawing, the staple pack  121  is formed with windows at a lower face, a front portion of an upper face thereof and a rear face thereof. The pressing plate  109  is brought into the window of the lower face and is brought into contact with a lower face of the staple sheet  122 . A feed claw disposed at inside of the staple cartridge  103  is brought into contact with a front portion of an upper face of the staple sheet  122 . 
   In charging the staple pack  121  to the staple cartridge  103  without removing the staple cartridge  103  from the electric stapler, as shown by  FIG. 3 , the slide door  106  and the pressing plate  109  are pushed down to the lower side and the staple pack  121  is inserted from a rear side of the staple cartridge  103  into a staple pack containing chamber. When the slide door  106  is released from being pushed down after inserting the staple pack  121 , as shown by  FIG. 4 , the slide door  106  is moved up to an initial position by being drawn by an elastic force of the tension coil spring  107  and a rear face of the staple pack  121  is covered. The pressing plate  109  is brought into elastic contact with the lower face of the staple sheet  122  at inside of the staple pack  121  to press to a ceiling face at inside of the staple cartridge  103  and the pressing plate  109  is moved up in accordance with a reduction in a number of sheets of the staple sheets  122 . In the case of using up the staples, when the slide door  106  is pushed down against an elastic force of the tension coil spring  107 , the empty staple pack  121  is drawn out and a new staple pack is charged thereto, the staple cartridge can immediately be used and staples are simply refilled by dispensing with time and labor of attaching and detaching the staple cartridge. 
   Next, a detailed description will be given of a second embodiment of the invention in reference to  FIG. 5  through  FIG. 10 . In  FIG. 5 , numeral  201  designates the driver unit of the electric stapler which is arranged at inside of a copier (not illustrated) in an attitude reversing a normal attitude in an up and down direction in view of a relationship with a print face of the copier and injects a staple from the driver unit  201  to a clincher unit (not illustrated) arranged opposedly thereto on an upper side thereof. The staple cartridge  203  attachable and detachable to and from a cartridge containing portion  202  of the driver unit  201  is formed with the opening portion  204  at a rear face thereof and the slide door  206  is engaged with the guide rail portion  205  in a vertical direction formed at rear ends of two left and right side faces. The slide door  206  is pulled out to the upper side by the tension coil spring  207  made to span upper portions of the two left and right side faces of the staple cartridge  203  and the slide door  206 . Further, inside of the staple cartridge  203  includes a pressing plate, not illustrated, and the pressing plate is pushed up to the upper side by the compression coil spring  208  installed at an inner bottom face thereof. The slide door  206  is formed with a groove (not illustrated) at a lower end portion of a center of a front face (face on a side of inside of a cartridge), a rear end portion of the pressing plate is projected to a position of the groove and when the slide door  206  is pushed down to a lower side as shown by  FIG. 6 , the rear end portion of the pressing plate  209  is engaged with the groove and also the pressing plate  209  is moved down simultaneously as shown by the drawing. 
     FIG. 7  shows a state of mounting the staple cartridge  203  to the driver unit  201  of the electric stapler, numeral  251  designates a staple pack made of paper for refilling, and a predetermined number of sheets of staple sheets  252  are stacked to be contained to the staple pack  251 . The staple pack  251  is formed with windows at a lower face thereof, a front portion of an upper face thereof and a rear face thereof. The pressing plate  209  is brought into the window of the lower face to be brought into contact with a lower face of a staple sheet  252 . A feed claw disposed at inside of the staple cartridge  203  is brought into contact with a front portion of an upper face of the staple sheet  252 . 
   In charging the staple pack  251  to the staple cartridge  203 , as shown by  FIG. 7 , the slide door  206  and the pressing plate  209  are pushed down to the lower side, and the staple pack  251  is inserted into the staple cartridge  203  from a rear side of the staple cartridge  203 . When the slide door  206  is released from being pushed down after inserting the staple pack  251 , as shown by  FIG. 8 , the slide door  206  is moved up to an initial position by being drawn by the tension coil spring  207  and a rear face of the staple pack  251  is covered. The pressing plate  209  is brought into elastic contact with a lower face of the staple sheet  252  at inside of the staple pack  251  to press to a ceiling face at inside of the staple cartridge  203  and the pressing plate  209  is moved up in accordance with a reduction in a number of sheets of the staple sheets  252 . When the staples have been used up, the empty staple pack  251  is drawn out by pushing down the slide door  206  and a new staple pack is charged thereto. 
     FIG. 9  shows a state of mounting the staple cartridge  203  to the driver unit  201  of the electric stapler. A lower face of a ceiling plate portion  210  of the staple cartridge  203  is attached with the leaf spring  211  in a front skewed lower direction and a front end of the leaf spring  211  is attached with the staple guide  212  constituting a guide of a rear face side (right on the drawing) of the driver of the electric stapler. The staple guide  212  is opposed to the face plate  213  provided at the driver unit  201  and an interval between the face plate  213  and the staple guide  212  which is a rear driver guide constitutes a path of the driver  201   a . The slider  214  slidable in a front and rear direction is provided below the ceiling plate portion  210 , a front portion of the slider  214  is attached with the leaf spring  215  in a rear skewed lower direction and the feed claw  216  is attached to a front end portion of the leaf spring  215 . 
   The slider  214  is inserted into a slide guide groove  217  of the staple cartridge  203  shown in  FIG. 10  and is attached with an arm  218  directed in a transverse direction at an upper face thereof. Two left and right ends of the arm  218  are projected to outer sides as shown by  FIG. 5  via grooves  219  formed at two left and right side walls of the staple cartridge  203  and driven to reciprocate in the front and rear direction by a staple feed link lever (not illustrated) of the electric stapler to feed the staple sheet to the front side by the feed claw  215  provided at the slider  214 . As shown by  FIG. 9 , a front portion of the leaf spring  211  attached with the staple guide  212  is moved down from an upper face of the slider  214  and when the slider  214  is moved forward, the slider  214  is brought into contact with a lower face of the leaf spring  211  to push up the leaf spring  211  and the staple guide  212  to an upper side and the staple guide  212  advances into a hole  221  of a sheet table  220 . 
   Numeral  222  indicated in  FIG. 9  and  FIG. 10  designates the guide table for guiding the staple sheet which is fed out and the staple sheet is moved forward from an upper face of the guide table  222 . As shown by  FIG. 10 , two pieces of the magnets  223  are embedded on left and right sides of a front end face of the staple cartridge  203  and a front face thereof is mounted with the front face cover  224  formed by a magnetic metal of iron or the like. The front face cover  224  is brought into contact with the magnets  223  and a magnetic field is generated at a surrounding of the front face cover  224  and the staple guide  212 . 
   In the case in which the staple is buckled and clogged at inside of the driver path in using the electric stapler, when the staple cartridge  203  is removed from the driver unit  201 , the buckled staple is taken out by being adsorbed to the front face cover  224  and the staple guide  212  and therefore, when the staple is removed and the staple cartridge  203  is mounted again to the driver unit  201 , the electric stapler is recovered to a usable state and jamming can very simply be dealt with. 
   Next, a detail description will be given of a third embodiment of the invention in reference of  FIG. 11  through  FIG. 19 . In  FIG. 11 , numeral  301  designates a driver unit of an electric stapler, the driver unit is arranged on a lower side of a sheet table (not illustrated) by being reversed from a normal attitude in an up and down direction in view of a relationship with a print face of a copier and a clincher unit (not illustrated) is arranged on an upper side of the sheet table. The staple cartridge  303  attachable and detachable to and from a cartridge containing portion  302  of the driver unit  301  is formed with the opening portion  304  at a rear face thereof and the slide door  306  is engaged with the guide rail portion  305  in a vertical direction formed at rear ends of two left and right side faces. The slide door  306  is pulled up to an upper side by the tension coil spring  307  made to span upper portions of the two left and right side faces of the staple cartridge  303  and the slide door  306 . Further, inside of the staple cartridge  303  includes a pressure plate, mentioned later, and the pressure plate is pushed up to the upper side by the compression coil spring  308  installed at an inner bottom face thereof. The slide door  306  is formed with a groove (not illustrated) at a lower end portion of a center of a front face (face on a side of inside of a cartridge) thereof, a rear end portion of the pressure plate is projected to a position of the groove and when the slide door  306  is pushed down to a lower side as shown by  FIG. 12 , also the pressure plate  309  is moved down simultaneously as shown by the drawing. 
     FIG. 13  shows the staple cartridge  303  and a staple pack  331  made of paper for refilling, and a predetermined number of sheets of staple sheets  332  are stacked to be contained in the staple pack  331 . In the drawing, the staple pack  331  is formed with windows at a lower face thereof, a front portion of an upper face thereof and a rear face thereof and as shown by  FIG. 14 , when the slide door  306  is released from being pushed down after inserting the staple pack  331  to the staple cartridge  303 , the above-described pressure plate  309  is brought into the window at the lower face to press the staple sheet  332  to an upper side and a feed claw disposed at inside of the staple cartridge  303  is brought into contact with a front portion of an upper face of the staple sheet  332 . The slide door  306  is moved up to an initial position by being urged by the tension coil spring  307  and a rear face of the staple pack  331  is covered. 
     FIG. 15  shows a state of mounting the staple cartridge  303  to the driver unit  301 . According to the staple cartridge  303 , the leaf spring  311  is attached to a lower face of a ceiling plate portion  310  in a front skewed lower direction and a front end of the leaf spring  311  is attached with the staple guide  312 . An upper end of the staple guide  312  is disposed at a height substantially the same as that of an upper face of the staple cartridge  303  and in a state of mounting the staple cartridge  303  to the driver unit  301 , the staple guide  312  is opposed to a face plate  321  on a front side provided at the driver unit  301  and the staple and a driver  322  pass a path at an interval between the face plate  321  and the staple guide  312 . 
   The slider  313  slidable in the front and rear direction is provided below the ceiling plate portion  310  of the staple cartridge  303 , the leaf spring  314  is attached to a front portion of the slider  313  in a rear skewed lower direction, and the feed claw  315  is attached to a front end portion of the leaf spring  314 . Further, an upper face of the slider  313  is attached with the arm  316  extended in a transverse direction. 
   By combining members centering on the staple guide  312  and the slider  313 , mentioned above, a drive mechanism of the electric stapler and a cooperatively moving mechanism for cooperatively moving the staple guide  312  are constituted. 
   As shown by  FIG. 16 , the two left and right end portions of the arm  316  are projected to outer sides by passing the grooves  317  formed at the staple cartridge  303  and a link lever  323  of the driver unit  301  pushes the arm  316  rearward to move back the slider  313  to a standby position. Numeral  324  designates a staple feed cam, numeral  325  designates a staple feed cam follower, numeral  326  designates a tension coil spring urging the link lever  323  frontward and in a stapling operation, by moving up and down the staple feed cam follower  325  by the staple feed cam  324  driven to rotate by a motor and pivoting the link lever  323  in accordance with the staple feed cam follower  325 , the slider  313  of the staple cartridge  303  is cooperatively moved to move in one reciprocation in the front and rear direction. As shown by  FIG. 15 , a front portion of the leaf spring  313  is moved down from an upper face of the slider  313  in an initial state and when the slider  313  is moved forward, the slider  313  is brought into contact with a lower face of the leaf spring  311  to push up the leaf spring  311  and the staple guide  312  to an upper side. 
   The drive mechanism of the electric stapler is constituted to carryout the operation of injecting the driver  322  successive to forward movement of the link lever  323 , the slider  313  is pushed forward from an initial state shown by  FIG. 15 ,  FIG. 16  and  FIG. 17 , a topmost staple sheet is fed to the front side by the feed claw  315  and the slider  313  pushes the leaf spring  313  to push up the staple guide  312  to the upper side. Thereby, as shown by  FIG. 18 , the staple guide  312  is floated up to enter inside of the hole  342  of the sheet table  341  shown in  FIG. 15  to be brought into contact with a lower face of paper (not illustrated) on the sheet table  341 . Simultaneously therewith, a clincher unit (not illustrated) is moved down to press paper and a forming plate  327  is moved up to form the staple S in a U-shape. 
   Further, as shown by  FIG. 19 , an anvil  328  at a center supporting a crown portion of the staple S and the driver (not illustrated) disposed on the lower side are moved up further from the state of  FIG. 18  and strike the staple S to paper. Thereafter, the forming plate  327  and the driver and the anvil  328  are moved down, the slider  313  is moved back to the initial position by the link lever  323 , the leaf spring  313  attached with the staple guide  312  is moved down, and the staple guide  312  is escaped to the lower side from the hole  342  of the sheet table  341 . 
   Although when the electric stapler of the background art in which a position of a staple guide in an up and down direction stays to be constant and the staple guide is not moved down from a hole is moved transversely by a feed mechanism, it is necessary to enable to move the electric stapler by forming a long hole connecting a plurality of stapling positions, according to the staple cartridge of the invention, the holes  342  having a necessary dimension may be formed only at a plurality of stapling positions of the sheet table  341  and a concern of catching paper fed from a copying mechanism portion onto the sheet table by the long hole is resolved. Further, since the feed claw  315  is attached to the slider  313  via the leaf spring  314 , when a front staple is brought into contact with the face plate to stop, the leaf spring  314  is bent and the feed claw  315  is detached from the staple sheet and the slider  313  and the feed claw  315  move forward. Therefore, even when a number of staples of a topmost staple sheet is reduced and the feed claw  315  is moved back to the initial position and engaged with a second staple sheet, in a forward moving stroke, the slider  313  is not locked by engaging the feed claw  315  with the second staple sheet, a stroke of moving the slider  313  is always constant and the staple guide  312  can firmly be moved up. 
   Further, the invention is not limited to the above-described embodiment but can variously be modified within the technical range of the invention and the invention naturally covers the modifications. 
   The application is based on Japanese Patent Application (Japanese Patent Application No. 2001-350669) filed on Nov. 15, 2001, Japanese Patent Application (Japanese Patent Application No. 2001-353716) filed on Nov. 19, 2001 and Japanese Patent Application (Japanese Patent Application No. 2001-363321) filed on Nov. 28, 2001 and a content thereof is incorporated here by reference. 
   INDUSTRIAL APPLICABILITY 
   As has been explained above, the staple cartridge of the invention is constituted to be able to charge the staple by opening the door provided at the opening portion of the rear face and therefore, the staple can easily be refilled in the state of mounting the staple cartridge to the electric stapler. 
   Further, by constituting the door by the slide door and forming the slide door to return to the closing position by the spring, the door can simply be opened and closed and the operability is promoted. 
   Further, by forming the pressing plate at inside of the staple cartridge to move to the escaping position in cooperation with the slide door, the staple can be charged by only operating to open the door and the operability is further promoted. 
   Further, the staple cartridge of the invention is provided with the staple guide for guiding the driver of the electric stapler at the face on the feeding outlet side of the staple sheet, the driver path is constituted by opposing the staple guide to the face plate arranged at inside of the cartridge containing chamber of the electric stapler and therefore, in the case of clogging the staple, when the staple cartridge is removed from the electric stapler, the staple can simply be removed and jamming can simply be dealt with by dispensing with the operation of opening and closing the face plate in the staple cartridge of the background art. 
   Further, by arranging the magnet at the vicinity of the staple guide of the staple cartridge, the staple buckled at inside of the driver path is adsorbed by the magnet and therefore, the staple can further simply be removed. 
   Further, the staple cartridge of the invention is constituted such that the staple guide for restricting the attitude of injecting the staple is moved cooperatibly with the feed claw, in injecting the staple, the staple guide is moved into the hole of the sheet table to be brought into contact with paper and the staple guide comes out from the hole of the sheet table after injecting the staple and therefore, in constituting a moving type electric stapler for binding a plurality of locations of paper by moving a single piece of the staple unit, it is not necessary to provide the long hole at the sheet table over the moving distance. Therefore, the concern that an end portion of paper is brought into the long hole to constitute a hindrance in feeding paper as in the moving type electric stapler of the background art can be resolved and the stability is promoted.