HAND TOOL IN THE FORM OF A LAWN TRIMMER OR BRUSHCUTTER

Description

State of the art

[0001] Hand tools in the form of a grass trimmer or brush cutter according to the preamble of claim 1 are already known. Reference is also made to the documents US 5 603 205 A, WO 2009 / 153751 A1, US 5 826 667 A and US 2 855 742 A. Disclosure of the invention

[0002] The invention relates to a hand-held power tool in the form of a grass trimmer or brush cutter having the features of claim 1.

[0003] It is proposed that, at least in a horizontal cutting configuration of the grass trimmer or brush cutter, the central or longitudinal axis and the rotational axis have an axial offset from one another and / or do not intersect. The central axis or longitudinal axis runs at least substantially along a center line or central axis of the spacer unit or a main tube of the grass trimmer. As a result, the cutting head is aligned offset from the spacer tube. This allows the main tube and / or the spacer unit to no longer essentially space the cutting head in front of the user in the horizontal cutting configuration, but also to position it laterally offset from the user. The main tube or the spacer unit is held essentially transversely to a main cutting or main running direction. This allows cuts to be made conveniently along walls or the like. The main running direction is essentially offset from the main direction of movement of the cutting head.

[0004] It is further proposed that an angle bisector of a V-shaped handle unit and the rotation axis also have an axial offset and / or that a plane spanned by a vertical, here in the Y-axis direction, and the angle bisector has an offset to the rotation axis of the cutting tool.

[0005] A lawn trimmer or brush cutter is proposed, comprising a rotatable cutting tool, in particular a cutting line, a cutting disc or a cutting blade, wherein the rotational axis of the cutting tool defines the Y-axis of a coordinate system and a horizontal cutting plane of the cutting tool normal to the rotational axis defines the X and Z axes of the coordinate system, wherein the Z-axis defines a main cutting direction of the trimming or cutting head or of the lawn trimmer or brush cutter, further comprising a main tube on which a handle unit is arranged, which is connected to the trimming or cutting head via a spacer unit, which in principle can also be formed integrally with the main tube, in particular an extendable spacer unit, preferably a telescopic unit.It is proposed that, at least in a horizontal cutting configuration of the grass trimmer or brush cutter, the longitudinal axis of the main tube encloses an angle with a plane spanned by the Y and Z axes, in particular an angle of 10-80°, preferably of 30-60°, particularly preferably of 40-50°, and most preferably of 45°. This allows the previously described advantages to be achieved in the same way. In principle, however, such a configuration also shifts the center of gravity centrally in front of the body and can be transferred comfortably and evenly to both hands via two handles, particularly those arranged in a V shape, starting from the center of gravity.

[0006] Furthermore, a lawn trimmer or brush cutter is proposed, comprising a main tube on which a handle unit is arranged, which is connected to a trimming or cutting head via a spacer unit, in particular an extendable spacer unit, preferably a telescopic unit. It is proposed that, in a horizontal cutting configuration of the lawn trimmer or brush cutter, the longitudinal axis of the main tube and / or the spacer unit projected onto the horizontal cutting plane forms an angle with a main cutting direction of the trimming or cutting head or of the lawn trimmer or brush cutter, in particular projected onto the horizontal cutting plane, in particular an angle of 10-80°, preferably of 30-60°, particularly preferably of 45°. Such an angle can, on the one hand, ensure a good view of the cutting head, and on the other hand, ensure a sufficient offset of the cutting head relative to the walking direction of the user.a bisector of the handle unit. This allows the cutting head to extend beyond half the user's shoulder width, allowing for comfortable cuts along high walls or hedges.

[0007] It is further proposed that the handle unit has a V-shaped arrangement with an opening angle, wherein the angle bisector of the opening angle projected onto the horizontal cutting plane is aligned parallel to the main cutting direction of the cutting head or that at least one angle bisector of the opening angle projected onto the horizontal cutting plane specifies a main cutting direction axis or main operator movement direction. It is proposed that the cutting head has a parallel offset to the main cutting direction axis, in particular ≥ ½ times the handle distance or ≥ ½ times a user's shoulder width, preferably ≥ 100 mm, in particular ≥ 150 mm, particularly preferably ≥ 200 mm, in particular increasing with extended telescoping of the telescopic unit. As already indicated, this allows comfortable cuts to be made along walls or bushes.The center of gravity can be positioned near a pivoting unit of the handle, which distributes the weight equally across both handles and hands, especially despite the asymmetrical lawn mower's alignment. This ensures fatigue-reduced operation.

[0008] It is further proposed that the cutting head has an angular offset or is arranged at an angle to a processing unit plane which, at least in a horizontal section configuration of the grass trimmer, is spanned by a parallel axis intersecting the longitudinal axis of the main tube to the axis of rotation of the processing unit and the longitudinal axis of the main tube or the spacer unit, in particular an angular offset of or is angled by 15-75°, preferably by 45°.

[0009] Furthermore, the invention is based on a handheld power tool, preferably a gardening tool, in particular a grass trimmer or brush cutter, comprising a handle unit and a processing unit, which are connected to one another via a spacer unit, in particular an extendable spacer unit, preferably a telescopic unit. It is proposed that the handle unit have two handles, with free handle ends facing one another in an X / V shape and / or non-free handle ends being connected in a V shape by means of a connecting unit, in particular a pivoting unit. This improves the ergonomics when gripping and using the handheld power tool.

[0010] It is proposed that the center of gravity of the handheld power tool be located in an area of ​​the at least V-shaped adjustable connecting unit of the handles, particularly in the area of ​​the swivel unit and / or along the longitudinal axis of the main tube. This allows for an even load distribution across both user arms.

[0011] To establish a moment equilibrium acting at least substantially around the longitudinal axis of a main pipe, it is proposed that the machining unit be arranged displaced to one side of the main pipe, and the grip unit and / or the second handle and / or the connecting unit and / or the pivoting unit (20) to the other side. This creates a moment equilibrium around the longitudinal axis of the main pipe. The operator therefore does not need to exert any force to stabilize the handheld power tool around the longitudinal axis. drawing

[0012] Further advantages emerge from the following drawing description. The drawing, the description, and the claims contain numerous features in combination. A person skilled in the art will also conveniently consider the features individually and combine them into further meaningful combinations.

[0013] They show: Fig. 1A hand-held power tool according to the invention, in the form of a garden tool, here in the form of a grass trimmer or brush cutter, in a front view. Fig. 2The grass trimmer in three views, each in a horizontal section configuration. Fig. 3The grass trimmer in three views. Fig. 4The grass trimmer in three arrangements, namely in a horizontal section configuration, in an edge-cutting configuration, and in a flat-cutting configuration. Fig. 5Two views of a pivoting and rotating device, each in an exploded view. Fig. 6An adjustment device for telescoping or height adjustment of the grass trimmer in an exploded view. Fig. 7A section of Figure 6 in different views, Fig. 8 the grass trimmer in a compact storage or transport configuration Fig. 9 an alternative swivel, rotation and height adjustment device.

[0014] Figure 1shows a handheld power tool in the form of a plant cutting device or a gardening tool, here in the form of a grass trimmer 10 or brush cutter. The grass trimmer 10 or brush cutter has a handle unit 12. The handle unit 12 comprises at least a first handle 14. The handle unit 12 also comprises a second handle 16. The first handle 14 is connected to the second handle 16 via a connecting unit 18. The second handle 16 is designed to be displaceable or foldable relative to the first handle 14. The second handle 16 can be pivoted relative to the first handle 14 or relative to a main tube 22 via a pivot unit 20. The pivot angle is an acute angle 24. As a result, the handle unit 12 assumes a V-shaped position, at least in a working position. The pivot unit 20 represents a part of the connecting unit 18 or the handle unit 12. The pivot unit 20 can be released via the release element 26.This allows a user to initiate the unfolding and / or folding process. The handle unit 12 is attached to the main tube 22 or a rod of the grass trimmer 10. The handle unit 12 can also form part of this main tube 22 or rod. The second handle 16 is connected to the pivot unit 20 via a tube 28. The tube 28 represents, in a sense, a part of the handle unit 12 or the connecting unit 18. The main tube 22 and the tube 28 are each at least partially surrounded by connecting or stiffening elements 30. These can merge into the respective handles 14, 16 or be formed integrally with the handles 14, 16. They stiffen the position of the handles 14, 16. They at least partially surround the main tube 22 and the tube 28.

[0015] The handle unit 12 is connected to a processing unit 38 via a spacer unit 32 or telescopic unit 34, here a further tube 36, in particular a tube 36 that is telescopic relative to the main tube 22. The spacer unit 32 connects the handle unit 12 and the processing unit 38 to one another and spaced them apart. The spacer unit 32 is designed to be movable relative to the handle unit 12 or the main tube 22. The spacer unit 32 is telescopic by actuating an adjusting device 40. For example, positive-locking elements (e.g., locking means) not shown here engage with corresponding positive-locking elements on the spacer unit 32. These are disengaged or engaged via the adjusting device 40. This allows the grass trimmer 10 or brush cutter to be adapted to different operating heights and / or positions, or to be compactly stored or transported. The processing unit 38 comprises a cutting head 42.The cutting head 42 drives a blade (not shown here) in a brush cutter, a cutting disc with, for example, movable cutting blades (hybrid brush cutter / trimmer - also not shown here), or a cutting line 44 in a grass trimmer 10. Due to the high rotational speed of the cutting line 44, it is tightened by centrifugal forces and can thus cut or cut off clippings, in particular grass. Alternatively, the processing unit 38 can also be a hedge trimmer attachment, a chainsaw attachment, a lopper attachment, a spray attachment, or the like. These can be optionally telescopic or designed with a fixed distance from the handle unit 12 or the main tube 22. In the present example, the cutting head 42 comprises a drive unit 46 and a cutting unit 48. The drive unit 46 is formed here by a motor, in particular an electric motor.The cutting unit 48 comprises a spool 50 on which the cutting line 44 can be located or wound. If the drive unit 46 rotates the spool 50 or the cutting line 44 protruding from the spool 50, grass, lawns, or bushes can be cut or trimmed in a known manner using the cutting line 44. Using the spacer unit 32, cuts can be conveniently made with the grass trimmer 10 or brush cutter while the user is standing or walking and, for example, pivoting the grass trimmer 10 over a lawn; work on hedges or trees can also be carried out, typically with the aforementioned attachments or other corresponding attachments. The drive unit 46 is supplied with energy, for example, by a battery (not shown here). The battery is arranged on a battery holder 52 at the end of the main tube 22 spaced apart from the cutting head 42, which here serves to improve the distribution of balance orserves to improve the ergonomics of the grass trimmer 10. The battery represents a counterweight to the motor or the cutting head 42, so to speak. This allows the center of gravity of the grass trimmer to be shifted to the area 53 of the handle unit 12 or to the area of ​​the pivoting unit 20 or the connecting unit 18. In principle, however, the battery can also be arranged at a different location. To activate the motor, a switch 54, in particular an accelerator switch, can be actuated by a user. Switching and / or control signals and / or the energy transport between the handle unit 12 and the cutting head 42 take place here, for example, via cables (not shown), which can be laid within the main tube 22 and the spacer unit 32.Of course, the gardening tool can have a control or regulation system that controls or regulates the motor based at least on signals from switch 54 and / or that monitors, controls, or regulates the battery or motor status and / or the like. Likewise, in such gardening tools, the motor can also be arranged at a different location, for example, at the end of the main tube 22 spaced apart from the cutting head 42 (i.e., in the area of ​​the battery interface 52 shown here). This can supply the cutting head 42 with drive energy, for example, via a power transmission shaft running in the main tube 22 and the spacer unit 32 or the additional tube 36.

[0016] For better clarity and orientation, a coordinate system 56 is shown in the other drawings. Relative to the cutting head 42 or grass trimmer 10 shown here in its horizontal cutting configuration 58, the cutting unit 48 or the spool 50 and / or the cutting line 44 rotates about the rotation axis 60 or the Y-axis. A horizontal cutting plane is spanned by the X- and Z-axes. This is also the plane in which the cutting line 44 rotates. The Z-axis, which extends out of the viewing plane of the drawing, also defines a main cutting direction 62 for better explanation. This main cutting direction 62 defines, for example, the straight-ahead gait of a user of the grass trimmer 10.

[0017] Figure 2 shows the grass trimmer 10 from Figure 1in three views a), b), c), each in the horizontal cutting configuration 58. This is intended for performing horizontal cuts, i.e. cuts essentially parallel to the working surface or plane, or the ground. In view a), the grass trimmer 10 is shown at least partially in a side view. View b) shows the grass trimmer 10 in a slightly forward tilted front view. View c) shows the grass trimmer 10 in a top view. In this view, the coordinate system 56 is also analogous to Figure 1 and the main cutting direction 62 in the z-axis direction. Reference numerals are for identical parts from the Figure 1essentially not reassigned, which also applies to the other figures. However, certain angles, axes, distances and directions are additionally shown. In principle, it should be noted that in the following, longitudinal axes of tubes, handles or similar, essentially elongated components are to be understood as running at least essentially along the central axis or center axis of the tubes, handles or similar, essentially elongated components. Thus, a longitudinal axis essentially corresponds to the central axis along the main extension direction of the respective component. A longitudinal axis 100 runs along the main tube 22, or along the spacer unit 32, the telescopic unit 34 or the further tube 36. A longitudinal axis 102 runs along the central axis of the tube 28 to which the second handle 16 is attached. A pivot angle 80 between the longitudinal axis 100 and a processing plane 82 is approximately 15-65°, here approximately 48°.In other advantageous configurations, it can be 36° or 24°. An angle 84 between the longitudinal axes 100 and 102 of the main tube 22 and the further tube 36 in view b) is approximately 45-75°, in particular approximately 60°. Starting from a plane 85 spanned by the Y and Z axes (cf. view c)), the angle bisector 87 of the angle 84 lies in a plane 86 parallel to the plane 85. The angle bisector 87 or parallel plane 86 intersects the pivot unit 20 and the trigger element 26 centrally. The handle unit 12 or pivot unit 20 is aligned in a V shape. To the right and left of the angle bisector 87 extend the legs (main tube 22 and tube 28) of the V, on which the handles 14, 16 are arranged. The top view on the right also shows a user with the grass trimmer 10 or brush cutter in a typical operating position. The user's view is oriented along the Z-axis.The center of the user's body is in the area of ​​the parallel plane 86, or the angle bisector 87 of the handle unit 12. The arrow 88 symbolizes a preferred running direction of the user along a preferred running axis 90. The preferred running axis 90 is aligned parallel to the Z-axis and has an offset 92. The same applies to the parallel plane 86 (in which the angle bisector 87 also lies) to the plane 85. The offset 92 is variable depending on the telescopic position of the telescopic unit 34. In this view, form-locking elements 94, which serve to lock during telescopic extension, are also visible on the telescopic unit 34 or the additional tube. The offset 92 amounts to slightly more than half the shoulder width 96 of a user. In other words, this is the offset 92 between the processing unit 38 or the cutting head 42, in particular the rotation axis 60 of the cutting unit 48 and a center of the handle unit 12 or the pivoting unit 20.This allows a user to comfortably walk straight along a wall, for example, while the cutting head 42 is shifted to the left. The angle 98 between the parallel plane 86 or the preferred running axis 90 and the at least projected longitudinal axis 100 of the main tube 22 is approximately 45°. It can, of course, also vary.

[0018] Figure 3 shows the grass trimmer 10 in three views a), b), c) with additionally drawn handle planes 101, 103 and a plane 104 which can be referred to as the handle pivot plane. Reference numerals refer to identical parts from the Figure 1 analogous to Figure 2essentially not assigned. The longitudinal axis 100 of the main tube 22, or the spacer unit 32, or the further tube 36, on which the first handle 14 is arranged; and the longitudinal axis 102 of the tube 28, on which the second handle 16 is arranged, span the plane 104. Along this plane 104 or in a plane at least parallel thereto, the tube 28 is also designed to be pivotable or foldable. It can be pivoted or folded between a working position and a storage or transport position (cf. Figure 8 ). The angle covered is acute. When unfolded, the angle 84 is around 60°, when folded, less than 20° (according to Figure 8approximately 10°). In principle, additional pivoting or folding angles are also conceivable, in which the pivoting unit 20 locks. This would allow the grip distance of the handles 14, 16 to be adjusted to suit different people, for example, depending on the user's shoulder width (96 mm) or a comfortable hand position depending on different sensitivities, or the like.

[0019] A longitudinal axis 106 extending through the first handle 14 and a longitudinal axis 108 extending through the second handle 16 are not arranged perpendicular to the plane 104. They are therefore not parallel. Rather, the handles 14, 16 are designed with their respective longitudinal axes 106, 108 inclined to the plane 104, in particular, each inclined about two mutually orthogonal longitudinal axes 100, 102, 116, 118. The longitudinal axes 100, 102 lie within the plane 104. Firstly, the handles 14, 16 are inclined toward each other about the longitudinal axes 100 and 102. The angle of inclination 110 or 112 between the plane 104 and the longitudinal axes 106, 108 of the respective handle 14, 16 is approximately 60°-85°, in particular approximately 75°. This angle of inclination 110, 112 corresponds to an angle of inclination about the longitudinal axes 100, 102, respectively. Furthermore, the handles 14, 16 are inclined around a normal to the respective longitudinal axis 100, 102 of the main tube 22, respectively.of the tube 28 and longitudinal axes 116, 118 running within the plane 104 (could also be referred to as auxiliary or orientation longitudinal axes). These angles 120, 122 are also each approximately 60°-85°, in particular approximately 75°. In other words, the handles 14, 16 are inclined towards each other with respect to their free handle ends 15, 17 on the one hand and / or on the other hand inclined in the direction of the processing unit 38 or the pivoting unit 20. In other words, the free handle ends 15, 17 are aligned with each other in particular in an x- / v-shape and / or the non-free handle ends 19, 21 are connected in a v-shape by means of the connecting unit 18, in particular the pivoting unit 20. This achieves pleasant ergonomics for the user. As a reader of this patent application or as a thought experiment, place your hands approximately shoulder-width apart or slightly closer together in your lap or on your thighs.You'll notice that this corresponds to a relaxed hand orientation—roughly how this grass trimmer 10 or brush cutter is gripped. This is precisely the advantage over so-called cowhorn handlebars, which are generally held higher and wider, and whose longitudinal axes are usually aligned parallel to each other. Furthermore, the handles 14 and 16 are typically spaced further apart on the cowhorn handlebar.

[0020] Figure 4 shows the grass trimmer 10 in three configurations a), b), c). Left (view a)) in the horizontal cutting configuration 400 (see also Fig. 1 , 2 and 3). In the middle (view b)) in an edge cutting configuration 402. On the right (view c)) in a flat cutting configuration 404, i.e. a configuration in which the space upwards or a height is limited, for example, in order to be able to perform horizontal cuts under objects such as tables, a porch swing or the like. Reference numerals are essentially not assigned to identical parts from the previous figures. To achieve the edge cutting configuration, a user or operator actuates the Figure 5described in more detail, pedal 612 in the direction of arrow 406 and then typically rotates the handle unit 12 about the longitudinal axis 100 of the main tube 22 or the spacer unit 32 in the direction of arrow 408 by 180°. This rotates the handle unit 12 and its handles 14, 16 point, for example, towards the ground. If the user now transfers the handle unit 12 to its starting position or usage position, the processing unit 38 or the cutting head 42 is aligned or oriented such that it can be used for edge cutting - that is, in the edge cutting configuration 402 according to view b). The cutting line 44 can now rotate in a vertically aligned plane. The support wheel 410 orThe cutting distance unit 412 sufficiently distances the spool 50 from the ground (not shown here) so that ideal edge trimming or cutting can take place and the cutting line 44, or alternatively the cutting blade (in the case of a brush cutter), is not worn excessively. This also ensures a sufficiently free length of the cutting line 44 to achieve a high cutting line speed at its end and consequently a high cutting quality. The cutting distance unit 412 and the support wheel 410 also serve to guide and ensure low-friction rolling over the ground. However, the support wheel 410 can also be used in the horizontal cutting configuration 400 or flat cutting configuration 404 along an edge, a wall or another object (not shown here), e.g., a tree, to ensure the ideal cutting distance of the cutting head 42 from the object.This results in less wear, particularly on the tool used (cutting line 44 or blade on the brush cutter), and operation is simplified and more intuitive. The flat cutting configuration 404 can also be achieved by actuating the pedal 612 and pivoting the main tube 22 or the handle unit 12 relative to the processing unit 38 or the cutting head 42 in the direction of the arrow 416. The main tube 22 and the handle unit 12 thus come closer to the ground, while the cutting line 44 can still rotate in a horizontal plane. The angles 80, not shown here, between the longitudinal axis 100 of the main tube 22 and the processing plane 82 (see also . Fig. 2 , View a) is approximately 36° in the edge-cutting configuration 402 and approximately 24° in the flat-cutting configuration 404, but can also assume other values. The pedal 612 pivots approximately 20° when actuated.

[0021] Figure 5shows a pivoting and rotating device 600 in a first view a) and a rear view b), each in an exploded view. The main components shown here are: the housing 602, comprising two housing shells 604 and 606; a spring 608; a clutch 610; a pedal 612 as a trigger element; a hub 614; a connector 616, which can also be referred to as a spacer unit connector or end stop; and a securing means 618. The components are arranged essentially along a main axis 620 (pivot axis). A further axis 622 (rotation axis) runs particularly orthogonally to this. In the present case, this further axis 622 also corresponds to the longitudinal axis 100 of the distance unit 32. The main axis 620 and the further axis 622 define the rotational degrees of freedom of the pivoting and rotating device 600 or the processing unit 38 relative to the handle unit 12 or the distance unit 32.It is intended to pivot the processing unit 38 about the main axis 620 (height adjustment by pivoting, or setting the angle 80 to the edge cutting configuration 402 see . Fig. 4 , View b) - here around 36°; or the flat cut configuration 404, angle 80 around 24°, cf. Fig. 4c) . Furthermore, it is provided, simultaneously or successively, in each case triggered by the common trigger element, namely the foot pedal 612, to rotate the processing unit 38 about the further axis 622 (to achieve the edge cutting function, edge cutting configuration 402, see. Fig. 4 , view b).

[0022] Starting from Figure 5, Views a) and b), several ribs 626 are arranged on the first housing shell 604, starting from a wall 624, which run parallel to the main axis 620. These ribs 626 correspond to recesses 628 in the coupling 610. They serve to prevent rotation of the coupling 610 relative to the housing 602; however, they enable axial displacement of the coupling 610 relative to the housing 602. The coupling 610 has inclined surfaces 630, which correspond to inclined surfaces 632 of the pedal 612 or form pairs of inclined surfaces. By actuating the pedal 612 in the direction of the arrow 634, the inclined surfaces 632 above the arm 636 are rotated relative to the other inclined surfaces 630 arranged on the coupling 610. Consequently, the coupling is displaced axially in the direction of the housing shell 604 or its wall 624, counter to the restoring or preloading force of the spring 608.

[0023] Teeth 638 arranged on the coupling 610, in particular teeth 638 of a spline, are disengaged from corresponding teeth 640 on the hub 614. Consequently, pivoting of the hub 614 about the main axis and relative to the housing 602 is possible as long as the tooth pairs 638 and 640 are disengaged. The pivoting can be limited, for example, by the contour of the housing opening 642. The hub 614 is designed to be rotatable about the main axis 620 relative to the pedal 612 and the housing shell 606 (here, a plain bearing). For this purpose, the pedal surface 644 contacts the hub surface 646 and the housing surface 648 contacts the hub surface 650 (axially relative to the main axis 620). To enable the rotation of the processing unit 38, in particular to enable the edge cutting function of the grass trimmer 10 or brush cutter, the hub 614 is provided to receive the connector 616 in a rotationally rotatable manner about the axis.In addition to the teeth 638, the axially displaceable coupling 610 also has a bolt 652. The bolt 652 is guided axially displaceably relative to the hub 614 by its sliding surface 654. It is designed to engage the recess 656 of the connector to prevent rotation of the connector 616 about the axis 622, optionally in a 0° or a 180° position. If the pedal 612 displaces the coupling 610 axially against the spring force toward the housing shell 604, both the spline engagement of the teeth 638, 640 of the coupling 610 and the hub 614 as well as the connection between the bolt 652 and the recess 656 are removed. This allows the machining unit to be pivoted and rotated relative to the distance unit about two axes (620, 622), in particular two axes (620, 622) extending orthogonally to each other, by means of a trigger element (here, the pedal 612). Alternatively, other trigger elements are also conceivable.The connector 616 is secured axially in the direction of the further axis 622 against displacement relative to the hub 614 or relative to the main axis 620 by the securing means 618. The securing means 618 is a circlip that rests in the groove 658 of the connector 616 and is supported on the surface 660 of the hub 614.

[0024] As can be seen in the lower view c), where the connector 616 is shown in two parts (rotated by 180°) and the hub 614 (right) is shown in a detailed view, the connector has locking means 662 (here in the form of a longitudinal groove) and recesses 664 (which are at least partially provided for a force-locking and / or form-locking connection with the spacer unit 32). Furthermore, the connector 616 has two further stop surfaces 666, 668 which correspond to stop surfaces 670 and 672 on the hub 614. As a result, when the processing unit 38 is rotated relative to the spacer unit 32 or the handle unit 12 about the further axis 622 or the longitudinal axis 100, a stop for the 0° and 180° positions is provided, which makes adjustment intuitive, simple, and safer. Locking of the rotating and pivoting mechanism is only possible if the tooth pairs 638, 640 and the bolt 652 and the recess 656 are in the corresponding alignment.In addition to other possibilities, it is also conceivable in principle to provide a further recess, e.g., at 90° and 270° of the connector 616, and / or possibly a frictional connection instead of the spline or bolt, in order to enable an even greater variety of adjustment positions when pivoting and rotating the hand tool. It is also conceivable that the trigger element also triggers the telescopic adjustment of the distance unit, for example, via a cable pull, a rod, a wedge, or the like. (See also . Fig. 9). In this way, the height adjustment (distance from the handle unit to the processing unit), the swivel function and the rotation function could be provided with just one trigger element. This trigger element could, for example, also be arranged on the handle unit, the spacer unit or the processing unit. Alternatively, it is also conceivable that with just one trigger element that acts between the processing unit and the spacer unit, the height adjustment along the longitudinal axis of the spacer unit (i.e. the adjustment of the distance between the handle unit and the processing unit) could be combined with the swivel function and / or the rotation function. It is also conceivable that the swivel function could be combined with the height adjustment function by means of a common trigger element.

[0025] Thus, the processing unit 38 is designed to be rotatable (to each other) relative to the distance unit 32 by means of a (common) triggering element (here the foot pedal 612, but in principle also any other common triggering element) about two axes (namely the main axis 620 and the further axis 622), in particular two axes running orthogonally to each other. To implement a height adjustment of the handle unit 12, in particular by means of a pivoting function about the angle 80 of the spacer unit 32 relative to the processing unit 38 (preferably by pivoting about a pivot axis, here the further axis 622 transverse to the longitudinal axis 100 of the spacer unit 32) and to implement an edge cutting configuration 402 by rotating the processing unit 38 relative to the spacer unit 32, in particular about the longitudinal axis 100 of the spacer unit 32. The trigger element (here the foot pedal 612) is provided for this purpose both a gear tooth locking (orplug-in toothing of the teeth 638, 340) as well as a bolt locking (of the bolt 652 in the recess 656) to at least release, and in particular to lock again.

[0026] Figure 6 shows the grass trimmer 10 or string trimmer with the pivoting unit 20 for V-shaped alignment of the handle unit 12 and the adjustment device 40 for telescoping or height adjustment in an exploded view. Identical parts from Figure 1 or the other figures are not described again.

[0027] Figure 7 shows an excerpt 500 from Figure 6in different views. View a) shows a sectional view of the adjustment device 40 or the height adjustment mechanism. The trigger element 502 is spring-loaded and is displaced in the direction of arrow 504 by pressure exerted thereon. As a result, a locking means 506 connected at least to the trigger element 502 lifts out of a corresponding form-locking element 94 on the tube 36. The tube can now be displaced relative to the main tube 22 in the direction of arrow 508.

[0028] View b) of the Figure 7, as well as the further views c), d) and e) show components of the swivel unit 20. The clamping plates 510, 512 are fixed to the main tube 22. A clamping plate 514 is fixed to the tube 28. They each have a recess through which the common swivel unit rotation axis 518 runs. Furthermore, the clamping plates 510, 512 and the clamping plate 514 have corresponding stop elements 520, 522, each offset by 180°. These serve as end stops in the open, V-shaped position of the handle unit 12. The trigger element 26 has clamping means 530 that correspond to form-locking elements 524, 526, 528 on the clamping plates 510, 512, 514. As a result, the adjustment device 40 can be locked in two positions by actuating the spring-loaded trigger element 26 (namely the V-shaped handle, pivot, or connection arrangement position according to, for example, Figure 1 , or the folded handle, swivel, or link arrangement position according to Figure 8 What is special about this, however, is that the clamping means - one of which can be seen in the enlargement X of section BB in view d) - has a bevel 532 at its distal end. In the V-shaped open position, this causes a clamping action between the clamping means 530 with corresponding form-locking elements 524, 526, 528 and the stop elements 520, 522. This removes the play in the handle unit 12 or the connecting unit 18 or the pivoting unit 20 in the V-shaped unfolded configuration. The pivotable handle unit 12 is thus mounted with as little play as possible in the working position, which increases comfort and safety.

[0029] Figure 8shows the grass trimmer 10 in a compact storage or transport configuration. The tube 36 is fully retracted relative to the main tube 22. The handle unit 12, or connecting or pivoting unit 18, 20, is folded. The other elements should be self-explanatory when viewed in conjunction with the previous figures.

[0030] Figure 9 shows, as already described in the description of Figure 5indicated, an alternative pivoting, rotating, and height adjustment device 700, in which all three or even a fourth adjustments (in addition to the pivoting angle of the handle unit 12) are triggered by means of the foot pedal 712. A displacement of the foot pedal 712 causes an axial displacement of the additional coupling 704 along the main axis 720 to the left. The contour 705 causes an axial displacement of the rod 706, so that its form-locking elements 707 are disengaged 708 from the tube 736, wherein the tube 736 simultaneously forms a tube 736 of the spacer unit 32 according to Fig. 1 The rod 706 can also be an alternative height adjustment mechanism 740 and / or a pivoting mechanism of the handle unit 12 (not shown here), for example Figure 1loosen or release. Now, rotation of the tube 736 about its longitudinal axis 100 is possible, for example, to enable the edge-cutting configuration 402. Furthermore, the height adjustment mechanism 740 is released. Furthermore, pivoting of the tube 736 about the main axis 720 is possible because the coupling 710 has been disengaged.

Claims

1. Hand-held power tool in the form of a lawn trimmer (10) or brush cutter, having a handle unit (12) and a treatment unit (38) which are connected to one another, and spaced apart from one another, via a distance unit (32), wherein the distance unit (32) has a central axis or longitudinal axis (100), and wherein the treatment unit (38) has an axis of rotation (60) about which an insert tool, in particular a cutting line (44) or cutting blade, can rotate, wherein, at least in a horizontal cutting configuration (58, 400) of the lawn trimmer (10) or brush cutter, the central or longitudinal axis (100) and the axis of rotation (60) have an axis offset (93) from one another and / or do not intersect, characterized in that the handle unit (12) has a V-shaped arrangement with an opening angle (84), wherein an angle bisector (87) of the opening angle (84) that is projected onto the horizontal cutting plane (82, 83) is oriented parallel to a main cutting direction (62) of the cutting head (42), or in that at least an angle bisector of the opening angle (84) that is projected onto the horizontal cutting plane (82, 83) specifies a main cutting direction axis (90), wherein the cutting head (42) has a parallel offset (92) from the main cutting direction axis (90), in particular a parallel offset (92) from the main cutting direction axis (90) of ≥ 1 / 2 times the handle spacing or ≥ 1 / 2 times a shoulder width (96) of a user and / or ≥ 100 mm, in particular ≥ 150 mm, particularly preferably ≥ 200 mm and / or that increases with increasing telescopic length of the telescope unit (34), characterized in that the central axis or longitudinal axis (100) intersects the treatment unit (38).

2. Hand-held power tool according to Claim 1, characterized in that an angle bisector (87) of a handle unit (12) with a V-shaped orientation and the axis of rotation (60) have an axis offset, and / or a plane (86) spanned by a vertical and the angle bisector (87) has an offset (92) from the axis of rotation (60).

3. Hand-held power tool according to either of the preceding claims, characterized in that the cutting head (42) is arranged angled away from a treatment unit plane (85) which, at least in a horizontal cutting configuration (58) of the lawn trimmer (10), is spanned by an axis which is parallel to the axis of rotation (60) of the treatment unit (38) and which intersects the longitudinal axis (100) of the main tube (22) and by the longitudinal axis (100) of the main tube (22) or of the distance unit (32), in particular having an angular offset (98) of, or being angled away by, 15-75°, preferably 45°.

4. Hand-held power tool according to one of the preceding claims, characterized in that the handle unit (12) has two handles (14, 16), wherein free handle ends (15, 17) are directed towards one another in an X-shaped / V-shaped manner, and / or non-free handle ends (114, 115) are connected in a V-shaped manner by means of a connecting unit (18), in particular a pivoting unit (20).

5. Hand-held power tool according to one of the preceding claims, characterized in that a centre of gravity of the hand-held power tool comes to lies in a region (53) of a connecting unit (18) of the handles (12), which connecting unit is able to have at least a V-shaped orientation, in particular in the region (53) of a pivoting unit (20) and / or along the longitudinal axis of the main tube (22).

6. Hand-held power tool according to one of the preceding claims, characterized in that, for producing a moment equilibrium at least substantially about the longitudinal axis (100) of a main tube (22), in particular asymmetrically, the treatment unit (38) is arranged displaced to one side of the main tube and the handle unit (12) and / or the second handle (16) and / or the connecting unit (18) and / or the pivoting unit (20) are / is arranged displaced to the other side of the main tube.