Abstract:
An electric tool, particularly a saw, has a connecting region and an actuating handle. The actuating handle is pivotally arranged on the connecting region, wherein the actuating handle can be pivoted into a number of pivoted positions and the actuating handle has at least one actuating switch for the electrical actuation of the electric tool. An uncomfortable position of the hand during actuation of the actuating handle is avoided and a high degree of comfort is achieved by the connecting region and the actuating handle being connected to each other by way of an articulated connection and by the articulated connection having a bearing lug and a handle pivot pin in engagement with the bearing lug.

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The invention relates to an electric tool, particularly a saw, having a connection region and an activation handle, wherein the activation handle is disposed on the connection region so as to pivot, wherein the activation handle can be pivoted into multiple pivot positions, and the activation handle has at least one activation switch for electrical activation of the electric tool. 
     While the invention is not restricted to saws, use of the invention in the case of a compound miter saw is particularly advantageous. In particular, however, the invention relates to a compound miter saw and miter saw. The electric tool preferably has a work piece support table and a movable unit, preferably a movable arm, having a processing tool. The processing tool can be a sawing apparatus, a grinding apparatus, or also a drilling apparatus, for example. However, manually guided electric tools or machines are also possible. 
     Using a miter saw, it is possible to cut work pieces, particularly work piece rods, at an angle that deviates from a right angle—the miter angle. In this connection, the work piece is laid onto a work piece support table of the miter saw. A sawing apparatus (as the processing tool) is disposed on an arm above the work piece support table, to saw the work piece. The sawing apparatus has an electric motor and a saw blade that is disposed so as to rotate and can be driven by the electric motor. The arm is preferably mounted to rotate about a vertical axis, on a means of rotation, for functional action. The angle of rotation can be adjusted by means of rotating the arm. Furthermore, the arm can preferably pivot about a miter axis, where the miter axis extends essentially perpendicular to the vertical axis, namely in a section plane. For this purpose, a pivot joint that can be fixed in place can be provided between the arm and the means of rotation. 
     A connection region on which an activation handle is disposed so as to pivot is provided on the electric tool, particularly the saw. The connection region is preferably formed on the arm of the saw, particularly on the miter arm of the miter saw or in the region of the saw unit/sawing apparatus preferably articulated onto the arm. This means that the activation handle is preferably disposed on the miter arm or on the saw unit so as to pivot about a handle pivot axle. In this connection, the activation handle can be pivoted into multiple pivot positions. 
     The activation handle furthermore has at least one activation switch for electrical activation of the electric tool. By means of activating the activation switch, a sawing apparatus assigned to the miter arm can be activated, in particular, so that an electric motor of the sawing apparatus is supplied with current by means of corresponding activation of the activation switch, and a saw blade is driven by the electric motor. The miter arm can preferably be lowered in part, using the activation handle, thereby causing the saw blade to then cut through the tool [sic—Werkzeug=tool should probably be Werkstück=work piece] that lies on the support table. 
     A miter saw having a connection region structured as a miter arm and having an activation handle is known from U.S. Pat. No. 6,769,338 B2. The activation handle can be pivoted into multiple pivot positions and has an activation switch for electrical activation of the miter saw. The miter arm can be inclined into various pivot positions, for example by 45° to the left and right relative to the vertical. The activation handle can be pivoted on the miter arm about a horizontal axis, which extends parallel to the section axis of the miter saw. The “handle pivot axis” of the activation handle is oriented parallel to the top of the support table. As a result, the activation handle can be oriented or pivoted parallel to the support table in the case of a laterally inclined miter arm. Furthermore, it is possible to pivot the activation handle in such a manner that the activation handle is disposed not transverse but rather parallel to the orientation of the saw blade. In this orientation, the activation handle cannot be grasped from above or below, but rather only from the side. 
     A miter saw having a work piece support table, an activation handle, and a “handle pivot axis” that extends parallel to the plane of the work piece support table is known from U.S. Pat. No. 6,658,976 B2. Again, this activation handle can be pivoted into an upward pivot position, i.e. essentially parallel to the saw blade, and into a pivot position perpendicular to the saw blade of the miter saw. In the pivot position parallel to the saw blade, the activation handle cannot be grasped from above or below, but, once again, rather only from the side. 
     The electric tools known from the state of the art, particularly the known compound miter saws and miter saws, are not yet optimally configured. In the case of the known miter saws, the pivot position of the activation handle cannot be adjusted with sufficient flexibility so that both left-handed and right-handed users can grasp the activation handle with equal ease. It is actually possible, if the hand position during sawing is uncomfortable, that the saw cut will fail as a result, or will not be carried out with the required precision. In particular, in the case of sawing work that continues for a long time, the user&#39;s hand can become tired more easily and cramp up, if it is in an uncomfortable position. 
     BRIEF SUMMARY OF THE INVENTION 
     The invention is therefore based on the task of configuring and further developing the electric tool mentioned above, in such a manner that an uncomfortable hand position during activation of the activation handle is avoided, and, in particular, the ease of use for the user is increased. 
     The task stated above is now accomplished in that the connection region and the activation handle are connected with one another by means of an articulated connection, and that the articulated connection has a bearing eye and a handle pivot axle that stands in engagement with the bearing eye. As a result of the articulated connection configured in this manner, the activation handle can be pivoted in a plane. Therefore the activation handle can preferably be grasped in pronated manner in all pivot positions. In other words, the user of the electric tool can grasp the activation handle with an overhand grip—back of the hand upward, palm of the hand downward. The possibility of grasping the activation handle with an overhand grip as a left-handed user and as a right-handed user, in all pivot positions, makes comfortable work possible. Because of the configuration of the articulated connection as described above, the possibility of grasping the handle with a pronated hand position does not change even if the activation handle is pivoted into different pivot positions (pivot positions) [Translator&#39;s Note as above]. In particular, the activation handle has a defined top and a defined underside as a result, where the orientation is not changed as the result of a pivot movement of the activation handle. The articulated connection is preferably structured in such a manner that the handle pivot axle extends transverse to a connection direction that extends between the connection region and the activation handle. This has the advantage that the activation handle can be pivoted essentially in the plane of the connection direction, and preferably transverse to the miter arm of a saw. The handle pivot axle, which is essentially formed by a handle pivot axle element that stands in engagement with the bearing eye, preferably extends parallel to a saw plane or to the saw blade of the saw. 
     The handle pivot axle therefore preferably extends parallel to the plane in which the saw blade of the miter saw can be lowered, or lies precisely in this saw blade plane, particularly if the activation handle is disposed above the sawing apparatus. The activation handle is preferably configured in frame-like manner and disposed transverse, particularly essentially perpendicular to the saw plane. Thus, the activation handle extends essentially horizontally (when the saw unit is folded down), in all its pivot positions, always essentially in the same plane. Preferably, the activation handle can be pivoted into at least three pivot positions that can be activated. In one pivot position, the activation handle can be directed to the right relative to the arm (miter arm). In another pivot position, the activation handle can be oriented centered relative to the arm. In yet another pivot position, the activation handle can be directed to the left relative to the arm. In the centered pivot position, the activation handle—if it is disposed above the saw blade of the compound miter saw and miter saw—is suitable for both right-handed and left-handed users, in this centered pivot position. If the saw blade is disposed in the swung-down position in the case of a compound miter saw and miter saw (as the electric tool), then the handle pivot axle of the activation handle is preferably oriented essentially vertically relative to the top/plane of the work piece support table. The handle pivot axle then extends upward, parallel to the saw blade, or, if the activation handle is disposed centered directly above the saw unit, lies directly in the plane of the saw blade, with a vertical orientation relative to the top of the work piece support table. The disadvantages described initially are therefore avoided, and corresponding advantages are achieved. 
     There is now a plurality of possibilities for configuring and further developing the The electric tool according to the invention in advantageous manner. For this purpose, first of all reference will be made to the dependent claims that follow the independent claim(s). In the following, a preferred embodiment of the invention will now be explained in greater detail using the drawing and the related description. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING 
         FIG. 1  in a schematic, perspective representation, an electric tool, namely a compound miter saw and miter saw, at a slant from above, right rear, with an activation handle in a first pivot position, 
         FIG. 2  in a schematic, perspective representation, the compound miter saw and miter saw from  FIG. 1 , with the activation handle in a further, second pivot position, 
         FIG. 3  in a schematic, perspective representation, the compound miter saw and miter saw with the activation handle in a third pivot position, 
         FIG. 4  in a schematic, perspective detail representation, the activation handle and a connection region of the compound miter saw and miter saw from  FIGS. 1 to 3 , 
         FIG. 5  in a schematic top view, the activation handle and the connection region in another pivot position, 
         FIG. 6  in a schematic exploded view, the activation handle and the connection region, 
         FIG. 7   a  in a schematic, perspective detail representation, the activation handle and the connection region, where a housing part of the connection region was removed, 
         FIG. 7   b  in a schematic side view, the connection region and the activation handle in a specific pivot position, 
         FIG. 8  in a schematic top view, the activation handle and the connection region, 
         FIG. 9  in a schematic sectional view along the line G-G from  FIG. 8 , the activation handle and the connection region, 
         FIG. 10  in a schematic sectional view along the line B-B from  FIG. 7   b , the activation handle and the connection region (from below) but in a different pivot position, where a housing part of the connection region was removed and an activation switch is activated, 
         FIG. 11  in a schematic, perspective representation, the activation handle and the connection region (from below) but in a pivot position as in  FIG. 10 , where multiple housing parts of the activation handle and of the connection region were removed and an activation switch is activated, 
         FIG. 12  in a schematic, perspective representation, the activation handle and the connection region in a similar representation as in  FIG. 11 , where here, the activation switch is not activated, 
         FIG. 13  in a schematic sectional view along the line B-B from  FIG. 7   b , the activation handle and the connection region, in a similar representation as in  FIG. 10 , but with the activation switch not activated (non-activated), 
         FIG. 14  in a schematic sectional view, the activation handle and the connection region similar to  FIGS. 10 and 13 , where an activation switch is not activated and the activation handle is disposed in a centered pivot position, 
         FIG. 15  in a schematic, perspective representation, the activation handle and the connection region in the centered pivot position, 
         FIG. 16  in a schematic sectional view along the line B-B of  FIG. 7   b , the activation handle and the connection region in the centered pivot position, where the activation switch is activated, 
         FIG. 17  in a schematic, perspective representation, the activation handle and the connection region of the centered pivot position from  FIG. 16 , 
         FIG. 18  in a schematic, perspective representation, the activation handle and the connection region in a pivot position to the right, with a non-activated activation switch, 
         FIG. 19  in a schematic sectional view along the section line A-A from  FIG. 7   b , from above, the activation handle and the connection region, in the pivot and activation position shown in  FIG. 18 , 
         FIG. 20  in a schematic, perspective representation, the activation handle and the connection region in the pivot position shown in  FIG. 18 , where the activation switch is activated, 
         FIG. 21  in a schematic sectional view along the line A-A of  FIG. 7   b , the activation handle and the connection region similar to  FIG. 19 , where the activation switch is activated, 
         FIG. 22  in a schematic, perspective representation, the activation handle and the connection region in a centered pivot position, where the activation switch is not activated, 
         FIG. 23  in a schematic sectional view along the line A-A of  FIG. 7   b , the activation handle and the connection region, in a pivot position corresponding to  FIG. 22 , 
         FIG. 24  in a schematic, perspective representation, the activation handle and the connection region in a centered pivot position, where here, the corresponding activation switch is activated, and 
         FIG. 25  in a schematic sectional view along the line A-A of  FIG. 7   b , the activation handle in the centered pivot position shown in  FIG. 24 , where the corresponding activation switch is activated. 
     
    
    
     DESCRIPTION OF THE INVENTION 
     An electric tool can be seen well in  FIGS. 1 ,  2 , and  3 . 
     Here, the electric tool is configured as a saw  2 , particularly as a compound miter saw and miter saw. 
     The electric tool  1  preferably has a work piece support table  4 . A work piece, not shown, can be laid onto the work piece support table  4  for processing. The electric tool  1  preferably has an arm  5 . In particular, a work piece processing apparatus—here, in particular, a sawing apparatus  6 —is disposed on the arm  5 , preferably once again so as to pivot. The work piece processing apparatus, preferably the sawing apparatus  6 , therefore is disposed so that it can preferably be pivoted upward and lowered. Here, the sawing apparatus  6  can be pivoted in the direction of the work piece support table  4 , in other words up and down, about a transverse axle that is not indicated in any detail here, relative to the arm  5 . 
     In an alternative embodiment, the electric tool  1  can be configured as a box column drill (not shown) or as a manually guided machine. In general, the invention relates to an electric tool  1  that can be activated with one hand. Here, the arm  5  can be activated with one hand, particularly pushed to the back and pulled to the front, where the sawing apparatus  6  can preferably be pivoted up and down, as well, using one hand. 
     In the following, the compound miter saw and miter saw  3  will be explained in greater detail as a preferred embodiment of the electric tool  1 : 
     Using the compound miter saw and miter saw  3 , strips, panels, or sheets, in particular, can be cut to the desired length, preferably including the desired miter cuts. Using the compound miter saw and miter saw  3 , not only can cuts be made at a right angle to the longitudinal axis of the work piece, not shown, but also, miter cuts can be made at an acute angle relative to the longitudinal axis of the work piece. 
     The work pieces can particularly be disposed transversely on the work piece support table  4 , in other words the work pieces preferably extend transversely on the work piece support table  4  with their longitudinal axis. A turntable  7  that is mounted so as to rotate, and is connected in one piece with a cantilever  8 , extends underneath the work piece support table  4 . In this connection, the cantilever  8  has a saw slit  9  into which the sawing apparatus  6  can plunge with the circular saw blade, which is covered by the saw blade cover  10 . When the sawing apparatus  6  is lowered, the saw blade cover  10  preferably tilts back and exposes the circular saw blade (not shown). 
     The arm  5  is connected with the turntable  7  by way of a slide guide device  11  and a pivot articulation connection  12 , in functionally effective manner. The slide guide device  11  preferably has two guide rods  13  that are disposed parallel to one another. The arm can preferably be rotated about a vertical axle, not shown, relative to the support table  4 , for one thing, and for another, can be displaced in the longitudinal direction of the guide rods  13 , in translational manner, using the slide guide device  11 , and pivoted about the pivot axle  14 , which is disposed parallel to the guide rods  13  here. So-called “double miter cuts” can be carried out with the compound miter saw and miter saw  3 , by means of the pivot mobility of the arm  5  about the pivot axle  14  and the vertical axle. 
     The electric tool furthermore has a connection region  15  and an activation handle  16 . The activation handle  16  is disposed on the connection region  15  so as to pivot. In this connection, the activation handle  16  can be pivoted into multiple pivot positions. 
     Three different pivot positions are shown in  FIGS. 1 ,  2 , and  3 . In  FIG. 1 , a first pivot position of the activation handle  16  relative to the connection region  15  is shown, where here, the activation handle  16  is pivoted to the left, from the point of view of the user of the compound miter saw and miter saw  3 . In  FIG. 2 , the activation handle  16  is pivoted to the right, relative to the connection region  15 , from the point of view of the user. In  FIG. 3 , the activation handle is oriented centered relative to the connection region  15 . 
     The “left” pivot position shown in  FIG. 1  is particularly suitable for activating the electric tool  1  with the left hand, and then, the work piece could be held in place with the right hand. The “right” pivot position shown in  FIG. 2  is suitable for activation of the arm  5  and the sawing apparatus  6  with the right hand, and then, the work piece could be held in place with the left hand. The centered pivot position shown in  FIG. 3  is particularly suitable for left-handed or right-handed activation of the electric tool  1 , and, in particular, a “force introduction” by the user is then also implemented in centered manner, and this is therefore particularly suitable for very clean cuts. 
     The activation handle  16  has at least one activation switch for electrical activation of the electric tool  1 . Here, the activation handle  16  preferably has multiple activation switches. In the exemplary embodiment of the electric tool  1  shown here, four activation switches  17 ,  18 ,  19 ,  20  are preferably provided. The connection region  15  is preferably disposed in centered manner, in the plane of the sawing apparatus  6 . Alternatively, the connection region  15  could be disposed offset relative to the saw blade plane. Here, the connection region  15  preferably extends essentially in the plane of the saw blade. Here, the connection region  15  is formed by a cantilever  15   a . The cantilever  15   a  extends above the saw blade, preferably essentially in the saw plane. The cantilever  15   a  is rigidly connected with the sawing apparatus  6 . 
     In the following, reference is now made to  FIGS. 4 and 5 . 
     It can be seen well that here, the activation handle  16  is configured essentially in frame shape and preferably has a rectangular shape. However, other shapes, preferably frame-like or partially frame-like shapes, are also possible. 
     The activation handle  16  has a shell-like housing. The activation switches  17 ,  18 ,  19 , and  20  are disposed in such a way, in each instance, that they can preferably be activated with the index finger and/or the middle finger. For this purpose, the activation switches  17 ,  18 ,  19 ,  20  are preferably disposed on three inner sides  21 ,  22 ,  23  of the activation handle  16 . In this connection, only one of the activation switches, in each instance—here, the activation switch  17  or  20 , respectively—is assigned to the lateral inner sides  12  and  23 , and two activation switches  18  and  19  are preferably assigned to the central inner side  22 . In this connection, the activation switches  17 ,  18 ,  19 , and  20  are configured essentially as a type of flat or profiled elements having a specific structure, and disposed accordingly within the shell-type housing of the activation handle  16 , as will still be explained. 
     A securing switch  24 ,  25 ,  26 ,  27  is preferably assigned to each of the activation switches  17 ,  18 ,  19 ,  20 . In this connection, the securing switches  24 ,  25 ,  26 ,  27  mechanically block a movement of the activation switches  17 ,  18 ,  19 ,  20 , as long as the safety switches  24 ,  25 ,  26 ,  27  are not activated. [Translator&#39;s Note: Both the term Sicherungsschalter=securing switch and the term Sicherheitsschalter=safety switch are used here.] 
     The disadvantages described initially are now avoided in that the connection region  15  and the activation handle  16  are connected with one another by means of an articulated connection  28 , and that the articulated connection  28  has a bearing eye  28   a  and a handle pivot axle  29  that stands in engagement with the bearing eye  28   a . This has the advantage that the activation handle  16  can be pivoted in a plane, preferably transverse to the saw plane, particularly essentially at a right angle to it. By means of the articulated connection  28 , the activation handle  16  can be grasped with a pronated hand position, i.e. back of the hand up and palm of the hand down, in all pivot positions. In the case of the preferred embodiment shown here, the activation handle  16  has the bearing eye  28   a , where the bearing eye  28   a  preferably completely encloses the handle pivot axle  29  (which can also be referred to as a bolt-type handle pivot axle element), in the present preferred embodiment. Here, what is important is the combination of the handle pivot axle  29  (or the handle pivot axle element) with a bearing eye configured in terms of functional technology, in order to implement engagement of the handle pivot axle  29  (or the handle pivot axle element) into the corresponding region of the bearing eye, so that while the activation handle  16  can preferably be pivoted into different pivot positions, it can preferably be pivoted essentially in the same plane. 
     It is particularly advantageous that the activation handle  16 , in the centered pivot position (cf.  FIG. 3 ), also extends essentially perpendicular to the saw blade or to the saw plane. Because the activation handle  16  can be pivoted in a plane through the articulated connection  28 , the activation handle  16  can always be grasped from the same side—preferably from above. This has the advantage that the activation handle  16  can comfortably be grasped in all pivot positions, thereby making precise and relaxed guidance of the arm  5  with the sawing apparatus  6  possible while sawing. 
     In the following, reference is made to  FIGS. 6 ,  7   a ,  7   b ,  8 , and  9 . The articulated connection  28  has a handle pivot axle  29  preferably assigned to the connection region  15  (where the element designated with the reference symbol “ 29 ” here can also be referred to as a handle pivot axle element). The activation handle  16  is mounted on the handle pivot axle  29  so as to pivot, and for this purpose preferably has the bearing eye  28   a . The handle pivot axle  29  preferably extends transverse to the activation handle  16 , i.e. transverse to the longitudinal expanse of the inner sides  21 ,  22 , and  23  of the activation handle  16 . The handle pivot axle  29  preferably extends transverse to the work piece support table  4 . In the case of the compound miter saw and miter saw, particularly in the swung-down state of the sawing apparatus  6 , the handle pivot axle  29  is therefore disposed or provided preferably vertical to the plane of the work piece support table  4 . 
     The connection region  15  preferably has multiple shell parts. Here, the connection region  15  has two shell parts  30 , which are preferably configured to have essentially the same construction. The connection region  15  preferably has an accommodation  31  into which the handle pivot axle  29  is inserted so as not to rotate, particularly with shape fit. Because of the fixed connection, the handle pivot axle  29  is assigned to the connection region  15  and not to the rotating activation handle  16 . Here, the accommodation  31  is delimited by the two shell parts  30 . 
     The activation handle  16  preferably has multiple handle shell parts, here the handle shell parts  32  and  33 , by means of which the housing of the activation handle  16  is essentially formed. The handle shell parts  32  and  33  are preferably connected with one another by means of multiple screw, plug-in, and/or clamp connections, which are not indicated in greater detail here. The two shell parts  30  of the connection regions  15  are preferably connected with one another in the same manner. 
     The embodiment of the activation handle  16  shown here furthermore has a particularly advantageous activation mechanism (not indicated in any greater detail in its totality): 
     The connection region  15  preferably has an electrical contact element  34 . The electrical contact element  34  is disposed between the two shell parts  30 , preferably outside of the region of the activation handle  16 , with shape fit. The connection region  15  furthermore has a switch element that can be displaced by means of the activation switches  17  to  20 , and is preferably configured as a switch bracket  35 . The contact element  34  can be activated by means of displacement of the switch element, here preferably the switch bracket  35 . 
     The switch bracket  35  has a bracket  36 , preferably in U shape, and a connection element  37 . The bracket  36  is closed by means of the connection element  37  at the end of its shanks (not indicated in any greater detail), which run essentially parallel to one another. The connection element  37  connects the shanks of the bracket  36  (cf.  FIG. 9 ). 
     The electrical contact element  34  is connected with the electric motor, not shown here, of the electric tool  1 , particularly here, the electric motor that drives the saw blade, by way of electrical lines, not shown here. In an alternative embodiment and/or in addition, the saw blade cover  10  can also be locked and unlocked with the electrical contact element  34 . The switch bracket  35  is disposed within the two shell parts in displaceable manner. The displacement direction is indicated with the double arrow D in  FIG. 9 . 
     The activation switches  17 ,  18 ,  19 ,  20  preferably have a switch hook  38 ,  39 ,  40 , and  41  as an integral component, in each instance. In an alternative embodiment, the activation switches can be connected with a corresponding switch hook  38 ,  39 ,  40 ,  41 , in functionally active manner. Furthermore, the activation switches  17 ,  18 ,  19 ,  20  have activation buttons  42 ,  43 ,  44 , and  45 —preferably as integral components (cf.  FIG. 6 ). 
     The activation switches  18 ,  19  are assigned to the central pivot position (cf.  FIG. 3 ) and can be activated only in this pivot position. In this connection, the activation switch  18  can particularly be activated with the index finger of the right hand, in the central pivot position. The related activation button  43  is disposed on the left (viewed from above) on the inner side  22 . In this connection, the activation switch  19  can particularly be activated with the index finger of the left hand, in the central pivot position. The related activation button  44  is disposed on the right (viewed from above) on the inner side  22 . 
     The activation switch  17  is assigned to the right pivot position (cf.  FIG. 2 ) and can be activated only in this pivot position. In this connection, the related activation button can particularly be activated with the index finger of the right hand in the right pivot position. The activation button  42  is disposed on the left on the inner side  21 . The activation switch  18  extends within the handle shell parts  32  and  33 , along this inner side  21 , and has a window  55  (cf.  FIG. 6 ), through which the activation button  42  passes. 
     The activation switch  20  is assigned to the left pivot position (cf.  FIG. 1 ) and can be activated only in this pivot position. In this connection, the related activation button  45  can particularly be activated with the index finger of the left hand in the left pivot position. The activation button  45  is disposed on the right on the inner side  23 . The activation switch  19  extends within the handle shell parts  32  and  33 , along this inner side  23 , and has a window  56  (cf.  FIG. 9 ), through which the activation button  45  passes. 
     The switch hooks  38 ,  39 ,  40 ,  41 , by means of activation of the activation buttons  42 ,  43 ,  44 ,  45  on the activation handle  16  or preferably within the handle shell parts  32  and  33 , are disposed in displaceable manner and/or configured to be movable and/or articulated on, in such a manner that—in the end result—the switch hooks  38 ,  39 ,  40 ,  41  can interact with the switch element, preferably with the switch bracket  35 , in terms of function technology. In particular, the switch hooks  38 ,  39 ,  40 ,  41  can be moved in the direction of the double arrow D (cf.  FIG. 9 , here, to the right), when the activation button  42 ,  43 ,  44 ,  45  is activated in the pivot position of the activation handle  16 , in each instance, thereby allowing the corresponding switch hook  38 ,  39 ,  40 ,  41  to engage on the connection element  37  and displacing the connection element  37 , also together with the bracket  36 , in the direction toward the center of the handle pivot axle  29 . Preferably, in this connection, an activation button, an activation switch, and a switch hook form a corresponding activation element, which is disposed within the activation handle  16  in movable manner. This activation element can act in terms of function technology, in particular, by means of the switch hooks, in each instance, on a movable element disposed in the region of the handle pivot axle  29 ; preferably, the switch hook, in each instance, can act on the connection element  37  (as a part of the switch bracket  35 ), which element is preferably disposed in the region of the handle pivot axle  29 , and here can be displaced toward the inside, in the direction toward the center of the handle pivot axle  29 , in interaction with the switch hooks. In this way—as has already been mentioned above—the switch bracket  35  is then displaced in such a manner that a contact element  34  is activated. The contact element  34  and/or at least a part of the contact element  34  is preferably itself impacted by a spring force internally, so that in the event that the activation switch  17 ,  18 ,  19 ,  20 , in each instance, or the activation buttons  42 ,  43 ,  44 ,  45  are no longer activated manually, a reverse movement takes place, on the basis of the spring force applied in the contact element  34 , in other words a displacement of the connection element  37  in the radial direction, toward the outside, away from the center of the handle pivot axle  29 . In other words—in the end result—the electronic [sic—probably should be electrical] contact element  34  is triggered by way of an element disposed, so as to move, in the region of the handle pivot axle  29 . 
     In each of the pivot positions, only a part of the activation switches  17 ,  18 ,  19 ,  20  is disposed so as to be displaceable in the direction of the double arrow D. 
     In the centered pivot position (cf. view “from above” in  FIGS. 14 ,  15 ,  16 , and  17 , as well as view “from below” in  FIGS. 22 ,  23 ,  24 , and  25 ), the two activation switches  18  and  19  can be displaced in the direction of the double arrow D. In this connection, the switch hooks  39  (cf.  FIG. 23 ,  25 ) and  40  (cf.  FIGS. 14 and 16 ) engage on the connection element  37  and thus on the switch bracket  35  for activation of the contact element  34 . The handle pivot axle  29  preferably has a recess  46 , where the switch bracket  35  engages into the recess  46 . Within the recess  46 , the corresponding switch hook  39  or  40  engages on the connection element  37 . The connection element  37  is displaced by means of displacement of the switch hook  38 ,  38  in the recess  46 . In  FIGS. 14 and 23 , the connection element  37  is shown in a non-activated position, and in  FIGS. 16 and 25 , it is shown in an activated position. On the basis of the possibility, which is created in this way, of displacement of the connection element  37  transverse to the handle pivot axle  29 , namely preferably within the recess  46 , the switch bracket  35  and thus the electrical contact element  34 , which is provided outside of the region of the activation handle  16 , can be controlled accordingly, preferably turned on, in every pivot position of the activation handle  16 , where shut-off is implemented by way of the spring elements within the contact element  34 , thereby then moving the connection element back in the reverse direction, as a result of which the activation switch that is interacting with the connection element  37 , in each instance, at that particular time, is once again moved back into its starting position. 
     Here, a section of the recess  46  preferably forms an oblong hole that extends essentially in the radial direction and has open edges. This oblong hole forms a guide for the switch bracket  35 , particularly for the connection element  37 . The corresponding switch hook  38 ,  39 ,  40 ,  41  engages on the connection element  37  within the recess  46 . 
     As a result, when the switch hook, in each instance, is activated, the triggering element, not indicated here in any detail, of the electrical contact element  34  is pressed into the housing, not indicated here in any detail, of the electrical contact element  34 , and the electrical contact is triggered. Another section of the recess  46  in the handle pivot axle  29  is particularly configured essentially in V shape (cf.  FIGS. 13 ,  14 ,  16 ,  19 ,  21 ,  23 , and  25 ). The corresponding switch hooks  38 ,  39 ,  40 , and  41  engage into the V-shaped section of the recess  46 . 
     In the left pivot position (cf. view “from below” in  FIGS. 10 ,  11 ,  12 , and  13 ), only the activation switch  20  can be displaced in the direction of the double arrow D. The switch hook  41  assigned to the activation switch  20  (cf.  FIG. 10 ,  13 ) engages on the connection element  37  and thus on the switch bracket  35  for activation of the contact element  34 , and engages into the V-shaped section of the recess  46 . Within the recess  46 , the switch hook  41  engages on the connection element  37 . The connection element  37  is displaced in the recess  46  by means of displacement of the switch hook  41 , i.e. by pressing the activation button  45 . In  FIGS. 12 and 13 , the connection element  37  is shown in a non-activated position, and in  FIGS. 10 and 11 , it is shown in an activated position. 
     In the right pivot position (cf. view “from above” in  FIGS. 18 ,  19 ,  20 , and  21 ), only the activation switch  17  can be displaced in the direction of the double arrow D. The switch hook  38  assigned to the activation switch  17  (cf.  FIG. 19 ,  21 ) engages on the connection element  37  and thus on the switch bracket  35  for activation of the contact element  34 , and engages into the V-shaped section of the recess  46 . Within the recess  46 , the switch hook  38  engages on the connection element  37 . The connection element  37  is displaced in the recess  46  by means of displacement of the switch hook  38 , i.e. by pressing the activation button  42 . In  FIGS. 18 and 19 , the connection element  37  is shown in a non-activated position, and in  FIGS. 20 and 21 , it is shown in an activated position. 
     Activation of the activation buttons  42 ,  43 ,  44 ,  45 , in each instance, is now blocked, if the pivot position of the activation handle  16  deviates from the predetermined pivot positions by more than a tolerance angle. In this connection, the tolerance angle is preferably determined by the opening angle of the V-shaped section of the recess  46 . If the actual pivot position of the activation handle  16  deviates from the predetermined pivot angle by more than the tolerance angle, the switch hooks  38 ,  39 ,  40 ,  41  bump up against the mantle surface of the handle pivot axle  29 . By pivoting the activation handle  16  into one of the predetermined “pivot positions that can be activated,” as a result, it becomes possible to activate at least one of the switch hooks  38 ,  39 ,  40 ,  41 , and it can therefore interact with the switch element, preferably the switch bracket  35 , where the other switch hooks are blocked by the outside circumference surface of the handle pivot axle  29 . In each of the first, second, and third pivot positions (activation handle to the left, activation handle to the right, and activation handle centered), at least one switch hook  38 ,  39 ,  40 ,  41  can therefore be activated within a tolerance angle, particularly by way of the corresponding related activation buttons  42 ,  43 ,  44 ,  45 , while the other switch hooks and their related activation buttons are specifically blocked—precisely as described above. Preferably, however, as has already been mentioned, two switch hooks can preferably be activated in the centered position of the activation handle  16 . 
     In the following, reference is made, once again, to  FIGS. 6 ,  7   a ,  7   b ,  8 , and  9 . 
     The handle pivot axle  29  has a slit  47  that extends essentially in the circumference direction (cf.  FIG. 6 ). During a switching process, the corresponding switch hook  38 ,  39 ,  40 ,  41  moves at least partly into the slit  47 . The switch hooks  38 ,  39 ,  40 ,  41  now have a blocking projection  48 , in each instance, that projects preferably upward or downward (cf. also  FIG. 6 ), where the blocking projection  48  can move into the V-shaped section of the recess  46 , but not into the slit  47 , since otherwise it would hit up against the outer circumference surface of the handle pivot axle  29 . In this way, it is ensured that the activation switches  17 ,  18 ,  19 ,  20 , in each instance, can be activated accordingly, in each instance, only within a tolerance angle about the related, predetermined, defined pivot position of the activation handle  16 , in each instance, particularly only in the predetermined pivot positions to the left, to the right, and centered on the activation handle  16 , in each instance. 
     The connection region  15  furthermore has a holding mechanism  49  (cf.  FIGS. 6 and 9 ), where the holding mechanism  49  can releasably fix the pivot position of the activation handle  16  in place. The activation handle  16  has a ring segment structure  50 , which preferably also radially encloses the bearing eye  28   a , at least in part. The ring segment structure  50  interacts with the holding mechanism  49 . The holding mechanism  50  can be releasably fixed in place on the ring segment structure  50 , to fix the pivot position of the activation handle  16  in place. The holding mechanism  49  can be connected with the ring segment structure  50  in clamping manner. The holding mechanism  49  has a preferably U-shaped clamping piece  51 . In this connection, the clamping piece  51  can have two clamping shanks  52 , where the holding mechanism  49  furthermore has a clamping screw  53  that connects the two clamping shanks  52 . Here, the ring segment structure  50  is disposed between the clamping shanks  52 , at least in part. The ring segment structure  50  can be clamped between the two clamping shanks  52  by turning the clamping screw  53 . 
     Multiple depressions on the ring segment structure  50 , which are not indicated in any greater detail here, are shown in  FIG. 7   a  and  FIG. 6 . In this connection, one of the clamping shanks  52  engages into the ring segment structure when this catch position is reached, so that the user receives feedback about the fact that he/she has reached a predetermined pivot position of the activation handle  16 . Depressions in the ring segment structure  50  disposed next to them indicate the tolerance angle or opening angle of the V-shaped section of the recess  46 , within which the active activation switches  17 ,  18 ,  19 ,  20 , in each instance, can be activated. 
     The securing buttons  24 ,  25 ,  26 ,  27  are biased by means of spring clips  54 , in each instance (cf.  FIGS. 10 and 11 ). By means of the spring clips  54 , the securing buttons  24 ,  25 ,  26 ,  27  are biased against the corresponding activation switches  17 ,  18 ,  19 ,  20 , so that the activation switches  17 ,  18 ,  19 ,  20  are forced into the “non-activated” position (cf.  FIG. 10 ) or are “blocked” in this position until this position is released by means of activation of the securing button, in each instance. 
     The method of operation of the activation handle  16  can be summarized as follows—for example for the “right” pivot position: 
     In the “right” pivot position shown in FIG.  2 —or 90° to the right relative to the circular saw blade—the securing button  24  is activated with the thumb, thereby releasing the activation switch  17 . As the next thing, the activation button  42  assigned to the activation switch  17  can be pressed. The switch hook  38  assigned to the activation switch  17  (cf.  FIG. 19 ) then presses on the switch bracket  35 , particularly on the connection element  37 , which is guided in the recess  46 , particularly the oblong-hole-shaped section of the recess  46 . As a result, the bracket  36  is pressed against the electrical contact element  34  and counter to a spring force that is applied here, and this triggers the electrical switching process. The movement sequence is reversed, by way of the spring force applied in the contact element  34 , when the activation button  42  is released. The remaining activation buttons  43 ,  44 ,  45  cannot be activated here in this “right” pivot position, even if the securing buttons  25 ,  26 ,  27  are pressed. 
     Here, the predetermined “left, right, centered” pivot positions preferably correspond to the pivot angles −90°, +90°, and 0° relative to the plane of the circular saw blade. The tolerance angle preferably amounts to essentially 20°. In other words, the activation handle  16  can be activated within pivot angles +90° to +70°, +20° to −20°, −70° to −90°. The function is queried by the blocking projection  48 , which here is configured as a crosspiece on the switch hook  38 ,  39 ,  40 ,  41 , in each instance (cf.  FIG. 9 ). If the angle deviation is greater than the tolerance angle, the blocking projections  48  do not release the switching process, in each instance. In the pivot position shown in  FIG. 19 , only the activation switch  17  can be activated. In the pivot position shown in  FIG. 3 , both activation switches  18  and  19  can be activated, and in the pivot position shown in  FIG. 1 , only the activation switch  20  can be activated. 
     The above explanations show that the activation handle  16  is therefore suitable for many types of electric tools  1  and can particularly be disposed and used on a corresponding electric tool  1 , where this is practical. 
     REFERENCE SYMBOL LIST 
     
         
           1  electric tool 
           2  saw 
           3  compound miter saw and miter saw 
           4  work piece support table 
           5  arm 
           6  sawing apparatus 
           7  turntable 
           8  cantilever 
           9  saw slit 
           10  saw blade cover 
           11  slide guide device 
           12  pivot articulation connection 
           13  guide rod 
           14  pivot axle 
           15  connection region 
           15   a  cantilever 
           16  activation handle 
           17  activation switch 
           18  activation switch 
           19  activation switch 
           20  activation switch 
           21  inner side 
           22  inner side 
           23  inner side 
           24  safety button 
           25  safety button 
           26  safety button 
           27  safety button 
           28  articulated connection 
           28   a  bearing eye 
           29  handle pivot axle 
           30  shell part 
           31  accommodation 
           32  handle shell part 
           33  handle shell part 
           34  contact element 
           35  switch bracket 
           36  bracket 
           37  connection element 
           38  switch hook 
           39  switch hook 
           40  switch hook 
           41  switch hook 
           42  activation button 
           43  activation button 
           44  activation button 
           45  activation button 
           46  recess 
           47  slit 
           48  blocking projection 
           49  holding mechanism 
           50  ring segment structure 
           51  clamping piece 
           52  clamping shank 
           53  clamping screw 
           54  spring clip 
           55  window 
           56  window 
         D double arrow