Abstract:
Disclosed is a stapler having various operation modes, as well as methods for switching the stapler among the operation modes. The stapler includes a primary staple magazine, a secondary staple magazine, a staple selector, a drive blade selector and a cover. The primary and secondary magazines respectively contain primary and secondary staples. The staple selector and the drive blade selector are movable for switching the stapler between primary and secondary staple modes. The stapler also includes a perforation for performing a perforating operation, and a switch for securing the stapler in a collapsed, compact form to simplify storage thereof. The stapler is switchable among a primary staple mode, a secondary staple mode, a perforation mode and a storage mode by means of the staple selector and the drive blade selector.

Description:
FIELD OF THE INVENTION 
     The present invention generally relates to a multi-function stapler switchable between various operation modes and a switching method thereof, and more particularly to a stapler capable of switching between a primary staple mode, a secondary staple mode, a perforation mode and a storage mode, and the switching methods of the same. 
     BACKGROUND OF THE INVENTION 
     Nowadays, although many documents are prepared using personal computers or handwriting, printing or photocopying is often needed to present the final form of documents. In printing or photocopying documents, the documents are made in individual and separate sheets, which have to be bound together as a consistent copy of documents. Nowadays, stapling is one of the most commonly and readily available binding techniques for loose pages of documents. 
     The implementation of a conventional stapler is to utilize staples that are each formed by two spaced pins or legs and are received and stored in the stapler. With a striking operation carried out by the stapler, the staples are sequentially and successively struck out of the stapler to force the pins thereof into the documents to complete the binding of the documents. The tips of the pins that extend through the documents are bent to fix the sheets of the documents together. Since the stapler has the advantages of being cheap and being convenient to use, many offices, schools, hospitals, homes and other places often regard the staplers as an essential accessory. 
     The staples which are placed in a stapler have different specifications. The most commonly used in a small size staple, which is referred to as No. 10 staple and has a binding capability of around 15 pages of documents. For documents having pages more than 15, a larger size stapler and the associated staples must be used, such as No. 3 staples, which is capable to bind some 30 pages. 
     For this reason, staplers that are capable of operation with two sizes of staples are available in the market. However, this kind of stapler only has single staple magazine to receive either small size staples or large size staples in an alternate manner. In other words, the stapler must be opened to remove the original staples before another size of staples can be used. Apparently, such a known stapler has drawbacks, such as inefficiency and inconvenience for exchanging the other size of staples or reloading of the staples. In other words, it results in lack of applicability for blinding. Furthermore, the conventional stapler might result in hurting the operator if the operator&#39;s fingers grab at a pin plate, which disposed on a base of the stapler, in exchanging the staples or reloading the staples. In addition, after exchanging the other size of staples or reloading the staples, it is necessary to apply a downward force to the cover to close it up and making the staples in a position. As a result, it is always wasting the first staple because when a downward force is applied to the cover, the first staple is inadvertently struck out of the stapler without binding any document. 
     In addition, because a force ratio of output to input of the conventional stapler is 1:1, the known stapler needs more force on binding more pages of documents. It is usually wasting the staples because the large force may easily make the staple slanted and not penetrating into the documents to be bound. Furthermore, the known stapler that can accommodate staples of different sizes is bulky in size and is also very heavy and cannot be closed to a compact form. All these make it difficult to carry and store easily. 
     Consequently, there is a need to develop a stapler operable with staples of different sizes and switchable among different operation modes without opening the stapler. And reloading the stapler can be easily done by removing a staple magazine therefrom. Furthermore, the stapler can also function as a punch that carries out perforating operation on documents. The stapler can also be closed to a compact form to ease storage thereof. Therefore, the stapler has the advantages of saving staples, increasing variety of use and enhancing convenience and the safety of operation and reloading staples. In addition, the stapler also has the advantage of being convenient to carry. 
     SUMMARY OF THE INVENTION 
     To overcome the foregoing drawbacks in the prior art, it is an objective of the present invention to provide a stapler switchable among a primary staple mode for striking staples of a first size, a secondary staple mode for striking staples of a second size, a perforation mode for punching documents, and a storage mode for converting into a compact form for easy storage. All these modes can be initiated without opening the stapler and re-loading staples of different sizes. 
     Another objective of the present invention is to provide a method for switching a stapler between a primary staple mode and a secondary staple mode so that the stapler exchangeably uses two sizes of staples without opening the stapler. 
     A further objective of the present invention is to provide a method for switching a stapler between a perforation mode and a storage mode so that the stapler can selectively perform perforating operations and can also be closed down to a compact form for easing storage thereof. 
     In accordance with an aspect of the present invention, a stapler is provided, comprising a primary staple magazine and a secondary staple magazine for respectively receiving and containing primary staples and secondary staples, a staple selector for switching between the primary and secondary staples, a drive blade selector for driving a drive blade to apply a striking force to a selected one of the staples, and a staple magazine retainer for selectively fixing and/or releasing the primary staple magazine and the secondary staple magazine out of the stapler to reload the staple magazines. The stapler also comprises a perforation bar and a switch. The perforation shaft is used for performing a perforating operation, and the switch is used for assisting collapsing the stapler into a compact form for easing storage thereof. 
     Furthermore, in accordance with another aspect of the present invention, a method for switching a stapler among a primary staple mode, a secondary staple mode, a perforation mode, and a storage mode is provided, which method is carried out by means of a staple selector and a drive blade selector, which allow for selection of staples and drive blades. In addition, the staple allows for easy reloading of staples by simply removing the primary staple magazine and/or the secondary staple magazine out of the stapler. 
     As the mentioned above, the present invention provides a stapler which is switchable between two different sizes of staples without opening the cover and reloading of staples can be easily done by removing a staple magazine out of the stapler. Furthermore, the stapler can also serve as a paper punch for performing a perforating operation, and also, the stapler can be closed or collapsed to a compact form for easing storage thereof. Therefore, the stapler has the advantages of saving staples, increasing variety of use, and enhancing convenience and safety in reloading staples. In addition, the stapler also has the advantage of being convenient to carry. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein: 
         FIG. 1  is a perspective view of a stapler constructed in accordance with the present invention; 
         FIG. 2  is a perspective view of a staple carrier structure comprised of a primary staple magazine and a secondary staple magazine of the stapler of the present invention; 
         FIG. 3  is a perspective view of a primary staple pusher and a secondary staple pusher of the stapler of the present invention; 
         FIG. 4  is a perspective view, partially broken, illustrating an internal assembly of parts of the stapler of the present invention; 
         FIG. 5  is a perspective view, partially broken, of a base of the stapler of the present invention; 
         FIG. 6  is a perspective view, partially broken, of a cover of the stapler of the present invention; 
         FIG. 7  is a side elevational view, in sectioned form, illustrating a primary staple mode of the stapler of the present invention; 
         FIG. 8  is a side elevational view, in sectioned form, illustrating a secondary staple mode of the stapler of the present invention; 
         FIG. 9  is a side elevational view, in sectioned form, illustrating a safe mode of the stapler of the present invention; 
         FIG. 10  is a side elevational view, in sectioned form, illustrating a perforation mode of the stapler of the present invention; 
         FIG. 11  is a side elevational view, in sectioned form, illustrating the operation of perforation carried out with the stapler of the present invention; 
         FIG. 12  is a side elevational view, in sectioned form, illustrating a storage mode of the stapler of the present invention; and 
         FIG. 13  is a side elevational view, in sectioned form, illustrating reloading staples for the stapler of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to the drawings and in particular to  FIGS. 1 and 2 , a stapler constructed in accordance with present invention, generally designated at  10 , comprises a primary staple magazine  101 , a secondary staple magazine  102 , a magazine rack  103 , a staple selector  104 , a drive blade selector  105 , a base  108 , a cover  109 , a switch  110 , a drive blade fillister  204 , a staple magazine retainer  501 , a removable cover  505 , an effort-saving press lever  601  and a press shaft  602 . These components/parts will be sequentially illustrated in detail in the following description. Also given in the following is the operation of the stapler in accordance with the present invention. 
     As best shown in  FIG. 2 , the stapler comprises a staple carrier structure that is composed of the primary staple magazine  101  and the secondary staple magazine  102 . The primary staple magazine  101  is of a smaller size and is arranged inside and securely fixed to the secondary staple magazine  102 , which is of a larger size, in such a way that a left side wall, a right side wall and a front wall of the primary staple magazine  101  are spaced from the counterpart left side wall, right side wall, and front wall of the secondary staple magazine  102  by distances. In other words, the primary staple magazine  101  is received in the secondary staple magazine  102  with only a bottom of the primary staple magazine  101  fixed to a bottom of the secondary staple magazine  102 . In addition, two bars  102   a  are formed along the left and right side walls of the secondary staple magazine  102  in the form of sideway projecting flanges. 
     The primary staple magazine  101  functions to receive and contain therein staples of a first, small size (or specification), which will be referred to as “primary staples”  60  (see  FIGS. 7-13 ) hereinafter. The secondary staple magazine  102  receives and contains therein staples of a second, large size (or specification), which will be referred to as “secondary staples”  61  (also see  FIGS. 7-13 ) hereinafter. Therefore, when the secondary staples  61  are deposited in the secondary staple magazine  102 , each secondary staple  61  has a top portion or crown spanning between the left and right side walls of the primary staple magazine  101  and opposite pins (or legs) extending from the top portion and movably received in the gaps or distances respectively defined between the left side walls and right side walls of the primary staple magazine  101  and the secondary staple magazine  102  so that the secondary staples  61  cover the primary staple magazine  101  and also covers the primary staples  60 , if any, received in the primary staple magazine  101 . 
     Also referring to  FIG. 3 , which shows a primary staple pusher  106  and a secondary staple pusher  107  of the stapler  10  in accordance with the present invention, the primary staple pusher  106  and the secondary staple pusher  107  respectively comprise a primary slide rail  106   a  and a secondary slide rail  107   a , each being configured as a horizontally-extending elongate flat bar. It is noted the term “horizontally” or other direction-related terminologies as used herein are used to facilitate understanding of the present invention and indicating the direction that is shown in the drawings, and not constituting any limitation to the orientation of use of the stapler. The primary slide rail  106   a  is arranged below the secondary slide rail  107   a . In addition, a primary pushing slide  106   b  is movable along the primary slide rail  106   a  to server as a movable pushing block. Preferably, the primary pushing slide  106   b  is made hollow and movably fit over the primary slide rail  106   a . A secondary pushing slide  107   b  is formed as a hollow member having a first hollow portion fit over and movable along the secondary slide rail  107   a  to serve as a movable pushing block. The secondary pushing slide  107   b  is preferably of an L-shaped side elevational configuration having a reduced upper portion in which the first hollow portion is formed and an expanded lower portion forming a second hollow portion which allows extension of the primary pushing slide  106   b  therethrough during the movement of the primary pushing slide  106   b . In other words, when the primary pushing slide  106   b  and the secondary pushing slide  107   b  are individually moving along the primary slide rail  106   a  and the secondary slide rail  107   a , the primary pushing slide  106   b  is allowed to pass through the second hollow portion of the secondary pushing slide  107   b  without restriction of movement thereof. 
     As shown in  FIG. 3 , the primary slide rail  106   a  and the secondary slide rail  107   a  each form in a side face thereof a sideways open channel  106   d  and a sideways open channel  107   d , which respectively receive therein a spring  106   c  and a spring  107   c  for the primary slide  106   b  and the secondary slide  107   b . Preferably, the channels  106   d ,  107   d  are of a lying U-shape. It is, however, noted that similar channels can be formed on the other sides or opposite side faces, which are not visible in  FIG. 3 , of the primary slide rail  106   a  and the secondary slide rail  107   a  to similarly accommodate springs. The spring  106   c , which is received in the channel  106   d , has opposite ends respectively fixed to an end of the primary slide rail  106   a  and the primary pushing slide  106   b  to apply a biasing force therebetween. Similarly, the spring  107   c , which is received in the channel  107   d , has opposite ends respectively fixed to an end of the secondary slide rail  107   a  and the secondary pushing slide  107   b  to apply a biasing force therebetween. 
     Referring to  FIG. 4 , the primary staple magazine  101  and the secondary staple magazine  102  are both disposed inside the magazine rack  103 . The bars  102   a,  which are formed opposite side walls of the secondary staple magazine  102 , are set in sliding and fitting engagement with opposite inside surfaces of the magazine rack  103  to form slidable coupling therebetween so that the stapler carrier structure, which comprises the primary and secondary staple magazines  101 ,  102 , is movable with respect to the magazine rack  103 , as best seen in  FIG. 13 , for replacing or re-filling of the magazines  101 ,  102 . In addition, a blockader  201  is arranged at a front end of the secondary staple magazine  102  and has all inverted U-shaped structure straddling over the opposite side walls of the secondary staple magazine  102  with two legs of the inverted U-shape positioned against the opposite side walls of the front end portion of the secondary staple magazine  102  to set the blockader  201  at the front end portion of the secondary staple magazine  102 . Thus, the blockader  201  is substantially vertical and normal to the secondary staple magazine  102 . The blockader  201  is movable horizontally in a front-rear direction with respect to the secondary staple magazine  102  for selectively blocking and thus restricting striking movement of a primary drive blade  202 . 
     The staple selector  104  has a shape of a lying U having legs extending substantially horizontally and straddling over opposite side walls of the front end portion of the secondary staple magazine  102 . The staple selector  104  is horizontally movable with respect to the secondary staple magazine  102  between a first, engaged position and a second, release position to select between the primary staples  60  and the secondary staples  61 . Preferably, the staple selector  104  has portions engageable with the secondary staples  61  that have been deposited in the secondary staple magazine  102  so that when the staple selector  104  moved first engaged position, the secondary staples  61  are forced off a struck position and striking of the secondary staples  61  is impossible. This will be further discussed. 
     The drive blade fillister  204  is arranged above blockader  201  and is fixed. The drive blade fillister  204  carries the primary drive blade  202  and a secondary drive blade  203  that are located above the blockader  201 . The primary and secondary drive blades  202 ,  203  are movable with respect to the drive blade fillister  204  for being selectively operated to apply a downward force to the primary and secondary staples  60 ,  61  respectively to strike the staples  60 ,  61  out of the primary and secondary staple magazines  101 ,  102 . 
     In addition, as shown in  FIG. 4 , the primary staple pusher  106  and the secondary staple pusher  107  are disposed inside the primary staple magazine  101  to individually push the primary staples  60  and the secondary staples  61  forward to the front ends of the primary staple magazine  101  and the secondary staple magazine  102  by means of the biasing forces of the springs  106   c ,  107   c  acting on the primary and secondary slides  106   b ,  107   b.    
     Referring to  FIG. 5 , which illustrates the structure of the base  108  of the stapler  10  according to the present invention, the base  108  has a bottom to which the removable cover  505  is releasably mounted. Preferably, the removable cover  505  is pivotally connected to the base  108  by a pivot  505   a  so that the movable cover  505  is movable between a closed position where the cover  505  is closed up to the bottom of the base  108  to serve as a collector for storing punched paper scraps and an open position where the cover  505  is rotated away from the bottom of the base  108  to release the collected paper scraps. In addition, the base  108  is provided with a positioner  506  that functions to maintain a selected, constant margin of binding. In other words, the stapler  10  can achieve consistency of binding by adjusting the positioner  506  according the distance which is demanded. 
     The staple magazine retainer  501  is disposed above the movable cover  505  as shown in  FIG. 5 . The staple magazine retainer  501  comprises one or more crooks  502  and a resilient plate  503 . The crooks  502  are used for hooking the staple carrier structure that is comprised of the primary staple magazine  101  and the secondary staple magazine  102  to thereby retainer the primary and secondary staple magazines  101 ,  102  in positions inside the stapler  10 . The resilient plate  503 , serving as a spring that applies a biasing force to the staple carrier structure, is disposed above the metal crook  502  and is used to push the primary staple magazine  101  and the secondary staple magazine  102  out of the stapler  10  by the biasing force. Moreover, a release button  504  is disposed behind the resilient plate  503  for releasing the staple carrier structure from the crooks  502  to allow the primary and secondary staple magazines  101 ,  102  to be moved out of the stapler  10 . 
     Referring to  FIG. 6 , which illustrates the cover  109  of the stapler  10  according to the present invention, the switch  110  is movably formed on the cover  109 . When the switch  110  is moved to an activated position by moving toward a front end of the cover  109 , the cover  109  is forcibly closed down to the drive blade selector  105  so that the stapler  10  can be closed to assume a compact configuration for easy storage. The drive blade selector  105  is a movable member that is movably coupled to the primary drive blade  202  and the secondary drive blade  203 , which are showed in  FIG. 4 , in such a way that the drive blade selector  105  has opposite slots in which opposite projections of each drive blades  202 ,  203  are slidably received to allow the drive blade selector  105  to slide with respect to the drive blades  202 ,  203  for selectively not driving the primary drive blade  202 . This is done by aligning an opening (not labeled) defined in the drive blade selector  105  with the primary drive blade  202  so that depressing the drive blade selector  105  downward does not apply any driving force to the primary drive blade  202  for the primary drive blade  202  is allowed to extend into the opening. 
     In addition, the effort-saving press lever  601  is disposed between the cover  109  and the press shaft  602  so that the effort-saving press lever  601  can participate with the force for pressing the cover  109 . 
     Referring to  FIG. 7 , a primary staple mode of the stapler  10  according to the present invention will be described. The primary staple mode is used for binding document sheets of regular thickness. For example, about fifteen sheets of documents can be bound with the primary staples  60  in the primary staple mode. The staple selector  104  and the drive blade selector  105  are individually set in an initial status, wherein the staple selector  104  is pushed rearward of the stapler  10  to set at the first engaged position where the secondary staples  61 , if any, is acted upon by the staple selector  104  and is thus forced rearward to locate behind the primary drive blade  202  and the secondary drive blade  203 . Also, the blockader  201 , which is preferably fixed to the staple selector  104 , is set to locate behind the primary and secondary drive blades  202 ,  203  whereby the blockader  201  does not interfere with downward movement of the primary and secondary drive blades  202 ,  203 . Under this condition, with the biasing force of the spring  106   c  of the primary pushing slide  106   b  acting against the primary staples  60 , the first one of the primary staples  60  is set exactly below the primary drive blade  202 . Further, as shown in  FIG. 7 , the drive blade selector  105  is moved rearward to a position where driving coupling is established between the drive blade selector  105  and both the primary and secondary drive blades  202 ,  203 . At this time, applying a downward force to the cover  109  causes both the primary drive blade  202  and the secondary drive blade  203  to be simultaneously depressed downward by the drive blade selector  105 . Since the secondary staples  61  are moved rearward and off the struck position thereof, the downward movement of the secondary drive blade  203  does not hit any of the secondary staples  61  and the secondary drive blade  203  is allowed to get into the space between the front walls of the primary and secondary staple magazines  101 ,  102 , striking no secondary staple  61 . On the other hand, the primary drive blade  202  hits and strikes the first one of the primary staples  60  that is located therebetween to realize stapling of the primary staples in accordance with the primary staple mode. 
     Furthermore, in the primary staple mode, the primary staples  60 , when loaded into the primary staple magazine  101 , forces the primary pushing slide  106   b  rearward and at the same time deforming the spring  106   c  to build up potential energy therein. Once the first one of the primary staples  60  is struck out of the stapler  10 , the spring  106   c  releases a portion of the potential energy thereof to move the primary pushing slide  106   b  forward and thus urging the primary staples  60  forward to have the next staple  60  located exactly below the primary drive blade  202 . With the release of the potential energy, the spring  106   c  gradually reinstates the initial, un-deformed status. 
     Referring to  FIG. 8 , a secondary staple mode of the stapler  10  according to the present invention will be described. The secondary staples mode is used for binding sheets of document of a great thickness. For example, about thirty sheets of documents can be bound with the secondary staples  61  in the secondary staple mode. The staple selector  104  is pulled outward and set at a second released position, where the secondary staples  61  are no longer acted upon by the staple selector  104  and the spring  107   c  releases the potential energy thereof to drive the secondary pushing slide  107   b  forward and thus urging the secondary staples  61  forward to have a first one of the secondary staples  61  located in front of the primary staples  60  and exactly below the secondary drive blade  203 . The blockader  201  is moved to a position where the primary drive blade  202  is blocked, but the secondary drive blade  203  is not and is thus allowed to move downward. The drive blade selector  105  is moved to a position to have only the secondary drive blade  203  coupled thereto, while the primary drive blade  202  is substantially aligned with the opening of the drive blade selector  105 . At this time, applying a downward force on the cover  109  causes the secondary drive blade  203  to be depressed downward by the drive blade selector  105 ; however, the blockader  201  blocks the downward movement of the primary drive blade  202  so that the primary drive blade  202  moves with respect to the drive blade selector  105  and extends through the opening defined in the drive blade selector  105  without striking any primary staple. In other words, the secondary drive blade  203  strikes the first one of the secondary staples  61  out of the stapler  10  to realize stapling of the secondary staples in accordance with the secondary staple mode. 
     Furthermore, in the secondary staple mode, the secondary staples  61 , when loaded into the secondary staple magazine  102 , forces the secondary pushing slide  107   b  rearward and at the same time deforming the spring  107   c  to build up potential energy therein. Once the first one of the secondary staples  61  is struck out of the stapler  10 , the spring  107   c  releases a portion of the potential energy thereof to move the secondary pushing slide  107   b  forward and urging the secondary staples  61  forward to have the next staple  61  located exactly below the secondary drive blade  203 . With the release of the potential energy, the spring  107   c  gradually reinstates the initial, un-deformed status. 
     Referring to  FIG. 9 , a safe mode of the stapler  10  according to the present invention will be described. The safe mode ensures that switching between the primary staple mode and the secondary staple mode can be correctly carried out without resulting in any breakdown of the stapler  10 . For example, the staple selector  104  is set in the engaged position, while the drive blade selector  105  is set in the corresponding position. As shown in  FIG. 9 , when the staple selector  104  is pulled forward to the released position, the spring  107   c  forces the secondary pushing slide  107   b  to urge the secondary staples  61  forward to be located in front of the primary staples  60 . The blockader  201  is set in a position where it is located above the front-most one of the primary staples  60  and is thus below the primary drive blade  202 . At this moment, the secondary drive blade  203  is located above the first one of the secondary staples  61 . The drive blade selector  105  is coupled to both the primary drive blade  202  and the secondary drive blade  203 . Under this situation, applying downward force to the cover  109  causes the drive blade selector  105  to simultaneously drive both drive blades  202 ,  203  downward. However, the blockader  201 , which is located below the primary drive blade  202 , prevents the primary drive blade  202  from moving all the way downward. Since the drive blade selector  105  is not at the location where the primary drive blade  202  is aligned with the opening of the drive blade selector  105 , the primary drive blade  202  is thus secured between the drive blade selector  105  and the blockader  201 . Consequently, the cover  109  cannot be completely depressed down. With such a situation, a user is reminded to confirm whether the staple selector  104  and the drive blade selector  105  are properly set in desired locations. 
     On the other hand, without the safe mode described, when the staple selector  104  and the drive blade selector  105  are set at locations as mentioned above. Depressing downward the cover  109  causes both the primary drive blade  202  and the secondary drive blade  203  to simultaneously strike the secondary staples  61 . Consequently, breakdown of the stapler  10  results. 
     Referring to  FIG. 10 , a perforation or punching mode of the stapler  10  according to the present invention will be described. The perforation mode is used for punching or perforating documents. With the staple selector  104  is set in the engaged position and forcing the secondary staples  61  rearwards to locate behind the drive blades  202 ,  203  and the blockader  201  similarly located behind the drive blades  202 ,  203 , and the drive blade selector  105  is set in the location where the primary drive blade  202  is aligned with the opening of the drive blade selector  105  and the drive blade selector  105  is coupled to the secondary drive blade  203 . Therefore, the primary drive blade  202  is located above the first one of the primary staples  60 . 
       FIG. 11  illustrates the perforating operation of the stapler  10  according to the present invention. With the staple selector  104  and the drive blade selector  105  set at the locations shown in  FIG. 10 , depressing the cover  109  causes the drive blade selector  105  to move downward, and the primary drive blade  202  extends into the opening of the drive blade selector  105 ; and the secondary drive blade  203  is moved downward by the drive blade selector  105  into the space between the front walls of the primary staple magazine  101  and the secondary staple magazine  102 . Thus, both the primary drive blade  202  and the secondary drive blade  203  carry out no staple striking operation. 
     A perforation bar  701  is arranged in a rear portion of the stapler  10  and connected a bracket  702 , which is coupled to the cover  109 . Thus, depression of the cover  109  causes downward movement of the perforation bar  701  to perform the perforating operation. The punched paper scrapes are collected in the removable cover  505 . 
       FIG. 12  illustrates a storage mode of the stapler  10  according to the present invention. The storage mode is used for collapsing the stapler  10  to a compact and closed status for conveniently carrying away. The staple selector  104  and the drive blade selector  105  are set in the locations as the perforation mode shown in  FIG. 10 . And the cover  109  is depressed down. The switch  110  is then moved toward the front of the cover  109  to have a first barb  110   a , which is formed on the switch  110 , to engage a second counterpart barb  702   a  that is formed on the bracket  702 . As a result, the cover  109  is closed down to the drive blade selector  105  and the stapler  10  can be closed to realize the storage mode. 
       FIG. 13  illustrates reloading of staples for the stapler  10  according to the present invention. In both the primary and secondary staple modes mentioned above, the primary staple magazine  101  and the secondary staple magazine  102  can keep immoveable by the crooks  502  with the resilient plate  503  being deformed and building therein potential energy. Under this condition, to reload the stapler  10  with the primary staples  60  and/or the secondary staples  61 , it only need to actuate the release button  504  to allow the crooks  502  to release the staple carrier structure that is comprised of the primary staple magazine  101  and the secondary staple magazine  102 . At the same time, the resilient plate  503  urges the staple carrier structure, namely the primary staple magazine  101  and the secondary staple magazine  102 , out of the stapler  10 . After the reloading of the primary staples  60  and/or the secondary staples  61  has done, the staple carrier structure and thus the staple magazine  101  and the secondary staple magazine  102  are moved back into the stapler  10  and secured again by the crooks  502 . 
     As is understood by a person skilled in the art, the foregoing preferred embodiments of the present invention are illustrative rather than limiting of the present invention. It is intended that they cover various modifications and similar arrangements be included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structure.