Abstract:
A reciprocating hand saw ( 10 ) with a housing ( 12 ) that [comprises] a motor ( 17 ), a gearbox with a lifting rod ( 26 ) for moving a saw blade ( 28 ) mounted thereon up and down, and a base plate ( 24 ) on which the housing ( 12 ) is mounted is capable of carrying particularly easy-to-handle spare saw blades by the fact that the housing ( 12 ) has an opening ( 30 ) into which a magazine-like, longitudinal saw blade receptacle ( 20 ) is capable of being inserted in a detachable, captive manner, and a part of the saw blade receptacle ( 20 ) serving as grip ( 22 ) projects outwardly.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The present invention is based on a reciprocating hand saw according to the preamble of claim 1.  
           [0002]    Reciprocating hand saws are already known with which one or more spare saw blades can be stored in their housing. Previous saw blade receptacles are integrated in the housing and are capable of being closed with a cover. After the cover is opened, removing the saw blades stored in the container is a time-consuming, awkward procedure, with the sharp saw teeth increasing the risk of injury.  
         ADVANTAGES OF THE INVENTION  
         [0003]    The present invention having the features of claim 1 has the advantage that the spare saw blades, together with a saw blade receptacle, can be located quickly, and said saw blade receptacle can be removed quickly and conveniently. Additionally, the manner in which the saw blades are stored in the saw blade receptacle permits rapid, convenient removal of the saw blades without risk of injury. As a result, saw blades can be replaced particularly quickly and in an uncomplicated manner.  
           [0004]    Due to the fact that the grip of the saw blade receptacle forms a capsule-like region having an opening on the underside and, adjacent to this, is open at the top and back, the saw blade receptacle can be gripped securely, whereby the spare saw blades are easy to remove and refilling the saw blade receptacle is easy and convenient.  
           [0005]    The fact that the saw blade receptacle is composed of elastic plastic makes it lightweight and capable of damping vibrations from the mounting in the housing as well as the spare saw blades stored therein.  
           [0006]    Due to the fact that the saw blade receptacle is capable of being latched in the housing in a positive and non-positive manner by means of an overlatching spring located on the housing, the spare saw blades can be accessed conveniently and quickly, and they are stored securely against loss.  
           [0007]    Due to the fact that the reciprocating saw contains a hold-down spring that bears against the saw blade located in the saw blade receptacle in a preloaded manner, said saw blades are secured against vibrations and rattling.  
           [0008]    The fact that the hold-down spring is attached in the housing and extends from above into the saw blade receptacle permits the saw blade receptacle to be attached and removed easily.  
           [0009]    The fact that both the hold-down spring and the overlatching spring are configured as leaf springs makes them particularly easy and cost-effective to manufacture and install, and they are lightweight and robust.  
           [0010]    Due to the fact that a leaf spring is mounted on the end of the saw blade receptacle located underneath the saw blades to be inserted, which said leaf spring can be lifted by hand, the saw blades can be removed particularly conveniently and in a manner that protects from injury, after said leaf spring is lifted.  
           [0011]    Due to the fact that two opposing grooves are provided at the end of the saw blade receptacle to allow engagement of the lateral lobes of the clamping end of the saw blade, the spare saw blades lie in a stack in the saw blade receptacle and in the housing of the reciprocating hand saw in an axially secured and vibration-damped manner. 
       
    
    
     SUMMARY OF THE DRAWINGS  
       [0012]    The present invention is explained in greater detail hereinbelow with reference to associated drawings.  
         [0013]    [0013]FIG. 1 is a spacial rear view of a reciprocating hand saw according to the invention,  
         [0014]    [0014]FIG. 2 is a section according to FIG. 1 with the saw blade receptacle removed,  
         [0015]    [0015]FIG. 3 is a section viewed at an angle from behind with installed saw blade receptacle with the upper housing shell removed,  
         [0016]    [0016]FIG. 4 is a rear view of the saw blade receptacle,  
         [0017]    [0017]FIG. 5 shows the saw blade receptacle with spare saw blades inserted in the housing,  
         [0018]    [0018]FIG. 6 is a view of the saw blade receptacle at an angle from below,  
         [0019]    [0019]FIG. 7 is an enlarged underside view of the saw blade receptacle with detent spring. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0020]    [0020]FIG. 1 shows a battery-powered reciprocating hand saw  10  with a housing  12  that has a handle  14  on top. The underside of said handle has a push-button  16  for operating a not-shown on/off switch for the power supply of a motor  17  (FIGS. 2, 3) that is mounted between the housing shells  13 ,  130  of the housing  12 .  
         [0021]    A replaceable battery pack  18  is detachably mounted on the rear end of the housing  12 . In addition, below the battery pack  18 , the handle  22  of a longitudinal saw blade receptacle  20  extends rearward out of the housing  12 . The saw blade receptacle  20  is capable of being inserted longitudinally into an opening  30  of the housing  12 , and it is held in a detachable, captive manner along a groove-like channel  31  strengthened by longitudinal ribs  33 .  
         [0022]    The housing  12  is supported on a base plate  24  in a manner that allows it to turn at the bottom, said base plate serving as support foot when sawing is performed in mobile fashion.  
         [0023]    [0023]FIG. 2 shows a section of the lower region of the left housing shell  13  as viewed from the plane of joint, with the saw blade receptacle  20  removed. One can see its positioning ribs  21  for assuring the position of inserted saw blades  28 , especially in a stack, (FIGS. 4 through 7), as well as symmetrically opposed insertion grooves  40  for holding the lateral noses  69  of the clamping end  29  of the saw blade  28 .  
         [0024]    After the capsule-like handle  22 , the saw blade receptacle  20  forms, in the longitudinal direction toward the front, a U-shaped profile that is open at the top.  
         [0025]    In addition, one can see the longitudinal arrangement of the channel  31  with the longitudinal ribs  33  and an opening  30  at the rear end of the housing shell  13 , that forms a negative contour of the grip  22  and encompasses it tightly when inserted. In addition, a hold-down spring  32  and a detent spring  36  are visible, both of which are configured as leaf springs and, in the ready-to-operate state, they are located in slits  34  and  37  in the housing shell  13  in a manner that is captively clampable and fixed in position in the housing.  
         [0026]    The saw blade receptacle  20  has a recess  38  in its underside, into which a projection of the detent spring  36  can latch and thereby hold the saw blade receptacle  20  captive in the housing  12 .  
         [0027]    The detent spring  36  presses the saw blade receptacle  20  upward by engaging in the recess  38  in its base, and holds said saw blade receptacle securely in the housing  12 , free from vibrations.  
         [0028]    [0028]FIG. 3 is an inside view of the left housing half-shell  13 , and it shows that the grip  22  of the saw blade receptacle  20  has a downward-extending opening  25 . By inserting his finger or thumb in the recess  25 , the operator can grip the grip  22  securely and remove it, and he can hold the removed saw blade receptacle  20  securely in his hand.  
         [0029]    [0029]FIG. 4 shows the detail of the saw blade receptacle  20  with the end  23  pointing toward the observer. The saw blade  28  is situated therein with a hold-down spring  32  bearing against its upper flat side, therefore pressed downward on the bottom of the saw blade receptacle  20 , safeguarded against vibrations and rattling.  
         [0030]    Vertical positioning ribs  21  are mounted on the right longitudinal wall of the saw blade receptacle  20 , which said positioning ribs extend transversely into the interior of the saw blade receptacle  20 , and against which the back of the saw blade  28  rests. The clamping end  29  of the saw blade  28  is located in the rear end  23  of the saw blade receptacle  20 . The lateral noses  69  are inserted in opposing grooves  40  with positive engagement and slight play.  
         [0031]    All reciprocating saw blades with a T-shaped clamping profile and opposing noses  69  have the same dimensions in terms of saw blade back and clamping end  29 . All saw blades  28  configured in this fashion therefore have an identical, vibration-free position after they are inserted in the saw blade receptacle  20 .  
         [0032]    The tip of the saw blade  28  extends freely into the lower opening  25  of the grip  22 . After the saw blade receptacle  20  is removed, said saw blade can therefore be lifted upward by manually reaching through the opening  25  against the force of the hold-down spring  32 ; the lifted clamping end  29  can then be removed from the rear end  23  of the saw blade receptacle  20  particularly easily.  
         [0033]    [0033]FIG. 5 shows the saw blade receptacle  20  inserted in the left housing shell  13  as viewed at an angle from the top at the back. The position of the hold-down spring  32 , the positioning ribs  21  and the saw blade  28  is shown particularly clearly once more.  
         [0034]    [0034]FIG. 6 shows the saw blade receptacle  20  at an angle from the bottom at the back. The tip of the saw blade  28  can be seen extending into the opening  25 . Also shown clearly is the arrangement of the detent spring  36  fixed in position in the housing, with its upwardly extending projection that extends into a recess  38 . Beyond the exemplary embodiments shown in the preceding figures, the saw blade receptacle  20  has a recess  42  in its underside on its end  23 , through which the clamping end  29  of the saw blade  28  can be gripped particularly easily and safely removed.  
         [0035]    Also shown clearly is the edge  46  between the grip  22  and the insertion region of the saw blade receptacle  20 , which said edge serves as a stop when the saw blade receptacle  20  is inserted in the housing  12 .  
         [0036]    [0036]FIG. 7 shows an enlarged section of the underside view of the saw blade receptacle  20  on its underside with the recess  38  into which a dome-shaped projection of the leaf spring-like detent spring  36  can latch.  
         [0037]    The saw blade receptacle  20  can be removed completely from the reciprocating hand saw  10 . Once said saw blade receptacle is outside of the reciprocating hand saw, it is particularly easy to remove spare saw blades and reload new ones.  
         [0038]    The invention is not limited to reciprocating hand saws. Instead, it can also be used—in an adapted manner—for holding drill bits and bits for hand-held power drills, power-driven screwdrivers and the like, and for the longitudinal insertable tools of a sabre saw, a router or a planer.