Hand-held power tool and hand-held power tool device

Abstract

The invention is directed to a hand-held power tool (10), in particular a chainsaw, having a handguard lever (12) and having at least one mechanical control unit (14) for controlling the movement of the handguard lever (12) of the hand-held power tool (10). It is proposed that the control unit (14) has at least one mechanical control element (18) which is provided to control a rotational movement of the handguard lever (12) by an axial relative movement between the control element (18) and the handguard lever (12).

Description

[0001] Description

[0002] Hand tool and hand tool device

[0003] State of the art

[0004] A hand-held power tool with a hand-guard lever and with at least one mechanical control unit for controlling the movement of the hand-guard lever of the hand-held power tool has already been proposed.

[0005] Disclosure of the invention

[0006] The invention relates to a hand-held power tool, in particular a chainsaw, having a hand-guard lever and having at least one mechanical control unit for controlling the movement of the hand-guard lever of the hand-held power tool.

[0007] It is proposed that the control unit has at least one mechanical control element which is intended to control a rotational movement of the hand protection lever by an axial relative movement between the control element and the hand protection lever.

[0008] The inventive design of the handheld power tool enables particularly space-saving movement control of the hand guard lever. Advantageously, the control element can be arranged particularly close to the hand guard lever. Advantageously, particularly precise movement control can be achieved. Advantageously, particularly simple assembly of the control unit is enabled. The inventive design of the control unit, in particular of the control element, enables an improvement in the haptics during operation, in particular movement, of the hand guard lever. By controlling the movement of the hand guard lever by means of the control unit, a particularly pleasant user experience can be realized. Advantageously, the force required to move the hand guard lever can be adapted and / or adjusted in a particularly simple and / or precise manner. Advantageously, a particularly flexibly usable control unit can be provided.

[0009] The handheld power tool is preferably designed as a chainsaw, for example, as a fuel-powered chainsaw, in particular a gasoline-powered chainsaw, an electric chainsaw, a compressed air-powered chainsaw, an oil-pressure-powered chainsaw, or the like. Alternatively, however, it is also conceivable for the handheld power tool to be designed as a hedge trimmer, a drill, a cut-off grinder, a hand-held circular saw, or the like.

[0010] The handheld power tool, in particular the chainsaw, is preferably designed as a two-handed chainsaw. The handheld power tool, in particular the chainsaw, preferably has two handles. One handle of the two handles is arranged on a side of the handheld power tool facing away from a tool receiving area of ​​the handheld power tool. A tool for the handheld power tool can preferably be arranged, in particular is arranged, in the tool receiving area. The tool is preferably designed as a saw chain. Alternatively, however, it is also conceivable, in particular depending on the design of the handheld power tool, for the tool to be designed as a drill, a cutting disc, a saw blade or the like. A throttle trigger and / or a throttle trigger lock is preferably arranged on the handle. Another handle of the two handles is preferably designed as a handle bar or handle tube.The additional handle is arranged between the handle and the tool receiving area. The hand protection lever is provided in particular to protect an operator's hand resting on the additional handle, preferably to protect the operator, in particular the hand resting on the additional handle or an arm of the operator, from contact with the tool. “Intended” should be understood to mean specially set up, specially designed and / or specially equipped. The fact that an object is intended for a specific function should be understood to mean that the object fulfills and / or performs this specific function in at least one application and / or operating state. The hand protection lever is arranged in particular between the additional handle and the tool receiving area, preferably the tool.The hand guard lever is preferably designed to trigger a brake of the handheld power tool, preferably a chain brake, in particular in the event of an unexpected kickback of the handheld power tool. The brake is preferably designed to bring the tool, in particular the saw chain, to a standstill within fractions of a second when the brake is triggered, for example as a result of a kickback of the handheld power tool, preferably using mechanical and / or electronic means. The brake can preferably be triggered by a movement of the hand guard lever, in particular by a rotation of the hand guard lever about a rotation axis of the hand guard lever, preferably by a forward rotation of the hand guard lever about the rotation axis.For example, the handheld power tool has a trigger element which can be actuated by the handheld power tool upon forward rotation of the handguard lever starting from the neutral position, preferably upon movement of the handguard lever into a trigger position. The trigger element is provided in particular to trigger the brake upon actuation of the trigger element. The trigger element is designed, for example, as a button, a lever, a gear element or the like. In particular, contact of the operator's hand or arm with the handguard lever, for example caused by a kickback of the handheld power tool, can generate a movement of the handguard lever, in particular the forward rotation of the handguard lever, preferably in order to trigger the brake, in particular to actuate the trigger element.The hand guard lever is preferably rotatably mounted on a hand tool housing of the hand tool, in particular rotatably mounted about the rotation axis. The forward rotation of the hand guard lever is, in particular, a rotation of the hand guard lever in the direction of the tool receiving area, preferably the tool.

[0011] The mechanical control unit is designed in particular as a mechanical movement control unit for the hand guard lever. The mechanical control unit is preferably a gear, preferably a purely mechanical one, for controlling the movement of the hand guard lever. The movement behavior of the hand guard lever is determined in particular by the control unit. By a forward rotation of the hand guard lever, starting from a neutral position of the hand guard lever, by at least 10°, preferably by at least 15°, and preferably by at least 20° around the axis of rotation, the hand guard lever can be moved, in particular relative to the control element, preferably into the release position and, in particular, the brake can be released. In order to move the hand guard lever from the neutral position to the release position or from the release position to the neutral position, an actuating force must be applied to the hand guard lever.The actuating force for moving the hand guard lever from the neutral position to the release position or from the release position to the neutral position at an actuating point of the hand guard lever is preferably between 20 N and 60 N. Alternatively, however, it is also conceivable that the actuating force for moving the hand guard lever from the neutral position to the release position or from the release position to the neutral position at an actuating point of the hand guard lever has a value that is different from a value between 20 N and 60 N. The actuating point is preferably located at a free end of the hand guard lever. A distance of the actuating point from the axis of rotation is preferably between 100 mm and 140 mm, preferably between 110 mm and 130 mm and particularly preferably 120 mm.

[0012] The axial relative movement between the control element and the hand guard lever preferably occurs at least parallel to the rotational axis of the hand guard lever. The relative movement between the control element and the hand guard lever preferably occurs along the rotational axis of the hand guard lever. The rotational axis preferably corresponds to an axial movement axis of the axial relative movement between the control element and the hand guard lever. The hand guard lever is preferably fixed in the axial direction, in particular relative to the handheld power tool housing. The control element is preferably movable in the axial direction, in particular relative to the handheld power tool housing. Alternatively, it is conceivable for the hand guard lever to be movable in the axial direction, in particular relative to the handheld power tool housing, and for the control element to be fixed in the axial direction, in particular relative to the handheld power tool housing.Furthermore, it is alternatively conceivable for the hand guard lever and the control element to be movable in the axial direction, in particular relative to the handheld power tool housing. In particular, a rotational movement of the hand guard lever about the axis of rotation generates an axial movement of the control element, in particular a movement of the control element along the axis of rotation. The axis of rotation runs in particular at least substantially perpendicular to a main axis of extension of the handheld power tool. “Substantially perpendicular” can be understood as an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, in particular viewed in a projection plane, enclose an angle of 90° and the angle has a maximum deviation of in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°.A “main extension axis” of an object can be understood in particular as an axis that runs parallel to a longest edge of a smallest geometric cuboid that just completely encloses the object.

[0013] Furthermore, it is proposed that the control element have at least one control surface configured for axial displacement, in particular for the axial displacement of the control element. Advantageously, particularly precise movement control of the hand guard lever can be achieved. Preferably, an axial relative movement between the control element and the hand guard lever can occur through interaction of the control surface with the hand guard lever. For example, during a rotational movement of the hand guard lever, the hand guard lever interacts with the control surface to generate the axial relative movement between the hand guard lever and the control element. In particular, a main extension plane of the control surface runs at an incline, and in particular at a different angle than 90°, to the axis of rotation.A "main extension plane" of a structural unit or element can be understood as a plane that is parallel to a largest side surface of the smallest possible imaginary cuboid that just completely encloses the structural unit, and in particular runs through the center of the cuboid. The control surface is preferably flat. Alternatively, however, it is also conceivable for the control surface to be at least partially curved. The control surface is preferably part of a ramp element of the control element. The ramp element is preferably triangular in shape, in particular as a two-sided ramp, preferably without a center piece. The control surface corresponds in particular to one side of the preferably two-sided ramp. The control element preferably has a plurality of ramp elements and / or control surfaces for the axial displacement, in particular of the control element.The ramp elements and / or the control surfaces are preferably arranged around the rotation axis, in particular around the axial movement axis, preferably uniformly, in particular at least in one operating state. The ramp elements, in particular the control surfaces, preferably form a zigzag-shaped course, in particular around the axial movement axis and / or the rotation axis. The respective main extension planes of the control surfaces preferably enclose a corresponding angle with a plane perpendicular to the rotation axis, in particular the axial movement axis.

[0014] It is further proposed that the control unit comprise at least one further mechanical control element, wherein the control element and the further control element comprise complementary control surfaces configured for axial displacement, wherein in particular the further control element is connected to the hand guard lever in a rotationally fixed manner. Preferably, the further control element is formed integrally with at least part of the hand guard lever. “Integral” can be understood as at least materially connected, for example by a welding process, an adhesive process, an injection molding process and / or another process deemed appropriate by a person skilled in the art, and / or advantageously formed in one piece, for example by production from a single casting and / or by production using a single-component or multi-component injection molding process and advantageously from a single blank.Alternatively, however, it is also conceivable for the further control element to be fastened, in particular detachably, to the hand guard lever by means of a screw connection, a snap-in connection, a clamp connection, a rivet connection or the like. In this context, “detachable” should be understood in particular to mean “non-destructively separable”. Preferably, the further control element is rigidly connected to the hand guard lever. The further control element has, in particular, at least one control surface, preferably a plurality of control surfaces. The further control element preferably has at least one ramp element, preferably a plurality of ramp elements, which has / have the control surface(s) of the further control element. The at least one ramp element of the further control element is, in particular, designed to be complementary to the at least one ramp element of the control element.In particular, an axial relative movement between the control element and the hand protection lever, in particular the further control element, can be generated by a rotational movement of the hand protection lever through the interaction of the complementary control surfaces of the control element and the further control element. Preferably, interacting, in particular adjacent, control surfaces, preferably at least their main extension planes, of the control element and the further control element run at least substantially parallel to one another, in particular at least in one operating state. The ramp elements of the control element and / or ramp elements of the further control element preferably each have at least two different types of ramp elements, which differ in a ramp height and a ramp width. The two types of ramp elements are preferably arranged alternately around the axis of rotation, in particular around the axial axis of movement.The ramp heights of the ramp elements run, in particular, at least substantially parallel to the axis of rotation, in particular to the axial axis of movement. The ramp widths of the ramp elements run, in particular, in a circumferential direction that runs in a plane perpendicular to the axis of rotation, in particular to the axial axis of movement. In particular, during a rotational movement of the hand guard lever about the axis of rotation, the further control element rotates relative to the control element about the axis of rotation. Preferably, a rotation of the further control element relative to the control element, in particular during a rotation of the hand guard lever relative to the control element about the axis of rotation, generates an axial relative movement between the control element and the hand guard lever, in particular the further control element.When the hand guard lever transitions from the neutral position to the release position or from the release position to the neutral position, in particular, a peak of at least one of the ramp elements of the control element exceeds a peak of at least one of the ramp elements of the further control element. In particular, when the hand guard lever transitions from the neutral position to the release position or from the release position to the neutral position, a peak of at least one of the ramp elements of the type of ramp elements with a relatively greater ramp height of the control element or of the further control element exceeds a peak of at least one of the ramp elements of the type of ramp elements with a relatively smaller ramp height of the further control element or of the control element.

[0015] It is also proposed that the handheld power tool have a handheld power tool housing, in particular the one already mentioned, which has at least one bearing unit for supporting at least part of the control unit, in particular for rotationally fixed mounting of the axially movable control element. Advantageously, a particularly compact arrangement of the control unit in the handheld power tool housing can be achieved. Particularly simple assembly of the control unit, in particular of the control element, in the handheld power tool housing can be realized. The bearing unit has at least one bearing element for the control element. Preferably, the control element is mounted on the handheld power tool housing by means of the bearing element in a rotationally fixed manner, in particular about the axis of rotation and / or the axis of movement.Preferably, the control element is connected to the handheld power tool housing by means of the bearing unit, in particular the bearing element, in a manner movably mounted in the axial direction, in particular along the movement axis, preferably along the rotation axis. The bearing element is preferably formed integrally with at least part of the handheld power tool housing. Alternatively, it is also conceivable for the bearing element to be fastened, in particular detachably, to the handheld power tool housing by means of a screw connection, a snap-in connection, a clamp connection, a rivet connection, or the like. The bearing element preferably has a shape complementary to a free end of the control element. The at least one control surface of the control element and / or the at least one ramp element of the control element is arranged at a further free end of the control element.The free end of the control element is arranged, in particular, facing away from the further free end of the control element. The control element is connected to the bearing element, in particular on a side facing away from the at least one control surface of the control element and / or the at least one ramp element of the control element. The bearing unit preferably has at least one further bearing element for the hand guard lever. The hand guard lever is preferably mounted on the hand tool housing so as to be rotatable, in particular about the rotation axis and / or the movement axis, by means of the bearing unit, in particular the further bearing element, in particular via a bearing sleeve of the hand guard lever.The hand protection lever is fastened to the handheld power tool housing in particular by means of a fastening element, for example a screw, a rivet or the like and / or by means of a clamping connection, a snap-in connection or the like, preferably via the bearing sleeve. The hand protection lever is preferably fixed to the handheld power tool housing in the axial direction, in particular along the axis of movement, preferably along the axis of rotation, by means of the bearing unit, in particular the further bearing element. The further bearing element is preferably formed integrally with at least part of the handheld power tool housing. Alternatively, it is also conceivable for the further bearing element to be fastened, in particular detachably, to the handheld power tool housing by means of a screw connection, a snap-in connection, a clamping connection, a rivet connection or the like.

[0016] It is also proposed that the bearing unit predetermines at least one arrangement angle of the control element on the bearing unit. Advantageously, incorrect assembly of the control element on the bearing unit, in particular on the handheld power tool housing, can be counteracted in a simple design. Advantageously, a particularly simple and / or user-friendly assembly of the control element can be realized. The design of the bearing unit according to the invention can advantageously support the functionality of the control unit. A particularly reliable control unit can be provided. In particular, the bearing unit, preferably the bearing element, allows the assembly of the control element on the bearing unit only in one or more angular positions of the control element relative to the bearing unit, in particular the bearing element.The bearing element preferably has a bearing contour that is particularly complementary to a bearing connection contour of the control element. The bearing contour of the bearing element preferably allows the control element to be mounted only in one or more angular positions of the control element relative to the bearing unit, in particular the bearing element. The bearing element, in particular the bearing contour, preferably has one or more projections, one or more recesses, a combination of these, or the like.

[0017] It is further proposed that the control unit be provided to allow, starting from a neutral position of the hand guard lever, in particular the previously mentioned neutral position, a forward rotation, in particular the previously mentioned forward rotation, and a reverse rotation of the hand guard lever relative to the control element. Advantageously, the hand guard lever can be used to fulfill multiple functions thanks to the inventive design of the control unit. Advantageously, a reverse rotation of the hand guard lever can at least partially absorb an impact on the hand guard lever, for example when the hand tool is dropped, if it hits the hand guard lever. Advantageously, damage to the hand tool and in particular to the hand guard lever can be counteracted. A particularly robust hand guard lever can be provided.Advantageously, a particularly high level of occupational safety can be achieved. A particularly durable hand guard lever can be realized. The reverse rotation of the hand guard lever is, in particular, a rotation of the hand guard lever in a direction opposite to the forward rotation of the hand guard lever. The reverse rotation of the hand guard lever is, in particular, a rotation of the hand guard lever in a direction facing away from the tool holding area. The reverse rotation of the hand guard lever is preferably a rotation of the hand guard lever directed in the direction of the handle and / or the further handle. The reverse rotation of the hand guard lever is, in particular, a rotation of the hand guard lever about the rotation axis.

[0018] Furthermore, it is proposed that the control unit has at least one spring element, in particular a helical spring, which is intended to apply a force to the control element in the direction of the hand guard lever, wherein in particular the spring element at least partially encloses the control element in at least one operating state, preferably at least viewed in a direction parallel to the axis of rotation. Advantageously, particularly precise movement control of the hand guard lever can be achieved. A particularly pleasant operating feel can be achieved when the hand guard lever is moved by an operator. Advantageously, a particularly high level of operating reliability of the control unit can be achieved. Advantageously, the control unit can be adapted to different requirements particularly easily, precisely and / or flexibly.The spring element is preferably arranged between the control element and the handheld power tool housing, at least in one operating state. The term “an object at least partially encloses another object” should be understood in particular to mean that the further object is enclosed by the object in an angular range of at least 45°, preferably of at least 90°, and particularly preferably of at least 180°. The spring element preferably encloses the control element at least substantially completely, in particular at least when viewed in the direction parallel to the axis of rotation. The term “an object at least substantially completely encloses another object” should be understood in particular to mean that the further object is enclosed by the object in an angular range of at least 270°, preferably of at least 315°, and particularly preferably of at least 350°.Particularly preferably, the spring element completely encloses the control element, in particular at least when viewed in the direction parallel to the axis of rotation. The spring element encloses the bearing element and / or the further bearing element, in particular at least in one operating state, at least partially, preferably at least substantially completely and particularly preferably completely, in particular at least when viewed in the direction parallel to the axis of rotation. The spring element preferably encloses the bearing sleeve of the hand guard lever at least partially, preferably at least substantially completely and particularly preferably completely, in particular at least when viewed in the direction parallel to the axis of rotation, in particular the axis of movement. The spring element preferably rests, in particular with a free end of the spring element, on the hand tool housing.The spring element preferably rests, in particular with a further free end of the spring element, on the control element, preferably on a contact surface of the control element. The free end of the spring element is in particular arranged facing away from the further free end of the spring element. A main extension plane of the contact surface runs at least substantially perpendicular to the axis of rotation and / or the axis of movement. In order to move the hand guard lever rotationally, in particular from a stationary position of the hand guard lever, an actuating force is preferably applied counter to the spring force that can be generated by the spring element. The spring element is preferably designed as a helical spring. Alternatively, it is also conceivable for the spring element to be designed as a torsion spring, as a rubber-elastic element or the like. The control unit preferably has exactly one spring element, in particular the one already mentioned.Alternatively, however, it is also conceivable for the control unit to have a plurality of spring elements, in particular to apply a force to the control element in the direction of the hand guard lever. A movement of the control element along the axial movement axis, in particular along the rotation axis, generates, in particular, a compression or extension of the spring element. An extension and / or compression axis of the spring element runs, at least in one operating state, at least substantially parallel to the rotation axis and / or the axial movement axis.

[0019] It is further proposed that the spring element automatically moves the hand guard lever into the neutral position after a reverse rotation of the hand guard lever, starting from a neutral position of the hand guard lever, in particular the previously mentioned neutral position. Advantageously, a particularly high level of operating comfort of the hand-held power tool, in particular of the hand guard lever, can be achieved. Preferably, the control element and the further control element have complementary control surfaces configured such that, after a reverse rotation of the hand guard lever, starting from the neutral position of the hand guard lever, an automatic movement of the hand guard lever into the neutral position can be generated by means of the spring element.

[0020] It is further proposed that the control unit comprise a stop element which is provided for limiting a backward rotation of the hand protection lever starting from a neutral position of the hand protection lever, in particular the one already mentioned, in particular by the hand protection lever striking the stop element. Advantageously, a prescribed minimum distance between the hand protection lever and the additional handle can be maintained. Advantageously, an injury to an operator's hand resting on the additional handle caused by an impact from the hand protection lever can be counteracted. Advantageously, a particularly high level of occupational safety can be achieved. It is conceivable that a backward rotation of the hand protection lever starting from the neutral position is limited by the hand protection lever striking and / or the control element striking the stop element.The stop element defines, in particular, a stop position of the hand guard lever. The neutral position is preferably arranged between the release position and the neutral position. The neutral position and / or the release position are / are preferably stationary positions of the hand guard lever. In order to move the hand guard lever from a stationary position of the hand guard lever, preferably the release position or the neutral position, an actuating force must be applied to the hand guard lever. The stationary positions of the hand guard lever, in particular the release position and / or the neutral position, are preferably defined by the control unit, in particular the complementary control surfaces of the control element and the further control element.

[0021] It is also proposed that the handheld power tool has a handheld power tool housing, in particular the one already mentioned above, wherein an outer wall of the handheld power tool housing has the stop element. Advantageously, the arrangement of the stop element according to the invention makes it possible to keep a force acting on the stop element when the hand guard lever hits a stop particularly low. Any required reinforcement of the handheld power tool housing in a region of the stop element can be kept particularly low, or advantageously, additional reinforcement of the handheld power tool housing in the region of the stop element can be completely dispensed with. Material can be saved during the manufacture of the handheld power tool housing. Advantageously, a particularly cost-effective handheld power tool housing can be provided. The stop element is designed, for example, as a stop edge or the like.Preferably, the hand protection lever and / or the control element has a stop surface complementary to the stop element.

[0022] It is further proposed that the handheld power tool have at least one actuating element, in particular a switching element, for triggering a handheld power tool function, in particular a safety function, which can be actuated by a backward rotation of the hand guard lever starting from a neutral position of the hand guard lever. The backward rotation of the hand guard lever starting from the neutral position can advantageously be used to trigger a handheld power tool function. Advantageously, a particularly large number of operating options for the handheld power tool can be achieved by the operator. The handheld power tool function can, for example, be an additional activation stage for commissioning the handheld power tool, a safety function, for example a trigger for the brake, an automatic system check of the handheld power tool, or the like.Preferably, the actuating element can be actuated by the hand guard lever upon reverse rotation of the hand guard lever from the neutral position, for example, by a projection of the hand guard lever or the like. The actuating element is designed, for example, as a button, a lever, a gear element, or the like.

[0023] Furthermore, it is proposed that the actuating element can be actuated from the neutral position of the hand guard lever by a reverse rotation of the hand guard lever up to the stop element. This advantageously at least partially counteracts unwanted actuation of the actuating element. It is conceivable that the actuating element is arranged on the stop element. Alternatively, it is conceivable that the actuating element is arranged at a distance from the stop element.

[0024] It is also proposed that at least the control element is arranged at least in the vicinity of a rotational axis of the hand guard lever, in particular the axis already mentioned, and in particular is arranged closed around the rotational axis. Advantageously, a particularly space-saving control unit can be provided. A particularly advantageous chain of effects between the hand guard lever and the control element can be achieved. Advantageously, a particularly precise and / or reliable movement control of the hand guard lever can be realized. A “near range” is to be understood in particular as an area which has a maximum distance from a reference axis which is preferably less than 10 cm, more preferably less than 5 cm, particularly preferably less than 2 cm.The control element preferably encloses the axis of rotation at least substantially completely, preferably completely, in particular at least when viewed in the direction parallel to the axis of rotation.

[0025] Furthermore, the invention is based on a handheld power tool device for a handheld power tool, in particular a handheld power tool according to the invention, in particular a chainsaw, having at least one mechanical control unit, in particular the one already mentioned, for controlling the movement of a handheld power tool, in particular the one already mentioned, of the handheld power tool. It is proposed that the control unit have at least one mechanical control element, in particular the one already mentioned, which is provided for controlling a rotational movement of the handheld power tool by an axial relative movement, at least substantially along a rotational axis of the handheld power tool, in particular the one already mentioned, between the control element and the handheld power tool.

[0026] The inventive design of the handheld power tool device enables particularly space-saving movement control of a hand guard lever. Advantageously, the control element can be arranged particularly close to a hand guard lever. Advantageously, particularly precise movement control can be achieved. Advantageously, particularly simple assembly of the control unit is enabled. The inventive design of the control unit, in particular of the control element, enables an improvement in the haptics during operation, in particular movement, of the hand guard lever. By controlling the movement of the hand guard lever by means of the control unit, a particularly pleasant user experience can be realized. Advantageously, the force required to move the hand guard lever can be adapted and / or adjusted in a particularly simple and / or precise manner.Advantageously, a particularly flexible control unit can be provided.

[0027] The handheld power tool and / or the handheld power tool device according to the invention are not intended to be limited to the application and embodiment described above. In particular, the handheld power tool and / or the handheld power tool device according to the invention can have a number of individual elements, components, and units that differs from the number stated herein to fulfill a functionality described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also to be considered disclosed and can be used arbitrarily.

[0028] drawing

[0029] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0030] They show:

[0031] Fig. 1 shows a hand-held power tool according to the invention in a side view,

[0032] Fig. 2 shows a part of the hand-held power tool according to the invention in an exploded view,

[0033] Fig. 3 shows a control element of a mechanical control unit of the hand-held power tool according to the invention in a perspective view,

[0034] Fig. 4 shows a bearing unit of the hand-held power tool according to the invention in a perspective view,

[0035] Fig. 5 a part of the hand tool according to the invention in a cross-sectional view,

[0036] Fig. 6 shows a hand protection lever of the hand tool according to the invention in a neutral position of the hand protection lever,

[0037] Fig. 7 shows the hand guard lever in a release position of the hand guard lever, Fig. 8 shows the hand guard lever during a backward rotation of the hand guard lever starting from the neutral position and

[0038] Fig. 9 the hand guard lever in a stop position during a backward rotation of the hand guard lever starting from the neutral position.

[0039] Description of the embodiment

[0040] Figure 1 shows a handheld power tool 10. The handheld power tool 10 is designed as a chainsaw. The handheld power tool 10 is designed as an electric chainsaw, in particular as a battery-operated chainsaw. Alternatively, it is conceivable for the handheld power tool 10 to be designed as a fuel-powered chainsaw, in particular a gasoline-powered chainsaw, as a compressed air-powered chainsaw, as an oil-pressure-powered chainsaw, as a hedge trimmer, as a drill, as a cut-off grinder, as a hand-held circular saw, or the like.

[0041] The handheld power tool 10 is designed as a two-handed chainsaw. The handheld power tool 10 has two handles 54, 56. One handle 54 of the two handles 54, 56 is arranged on a side 64 of the handheld power tool 10 facing away from a tool receiving area 62 of the handheld power tool 10. A tool (not shown here) for the handheld power tool 10 can be arranged, in particular is arranged, in the tool receiving area 62. The tool is designed as a saw chain. Alternatively, however, it is also conceivable, in particular depending on the design of the handheld power tool 10, for the tool to be designed as a drill, a cutting disc, a saw blade, or the like. A throttle lever 66 and / or a throttle lever lock 68 is preferably arranged on the handle 54. Another handle 56 of the two handles 54, 56 is designed as a handle bar or handle tube.The additional handle 56 is arranged between the handle 54 and the tool receiving area 62. The additional handle 56 is designed as a handle bar or handle tube.

[0042] The hand-held power tool 10 has a hand protection lever 12. The hand protection lever 12 is provided to protect an operator's hand resting on the additional handle 56, in particular to protect the operator, preferably the hand resting on the additional handle 56 or an arm of the operator, from contact with the tool.

[0043] The hand guard lever 12 is arranged between the further handle 56 and the tool receiving area 62. The hand guard lever 12 is provided for triggering a brake of the handheld power tool 10 (not shown here), preferably a chain brake, in particular in the event of an unexpected kickback of the handheld power tool 10. The brake is preferably provided to bring the tool, in particular the saw chain, to a standstill within fractions of a second when the brake is triggered, for example as a result of a kickback of the handheld power tool 10, preferably using mechanical and / or electronic means. The brake can be triggered by a movement of the hand guard lever 12, in particular by a rotation of the hand guard lever 12 about a rotation axis 38 of the hand guard lever 12, preferably by a forward rotation of the hand guard lever 12 about the rotation axis 38 (see Figure 2).The rotation axis 38 runs at least substantially perpendicular to a main extension axis of the handheld power tool 10. The handheld power tool 10 has a trigger element 60. The trigger element 60 can be actuated by a forward rotation of the hand guard lever 12, starting from a neutral position, by the hand guard lever 12, preferably upon movement of the hand guard lever 12 into a trigger position of the hand guard lever 12. The trigger element 60 is provided, in particular, to trigger the brake upon actuation of the trigger element 60. The trigger element 60 is designed as a button or the like. Contact of a hand or arm of an operator with the hand guard lever 12, for example, caused by a kickback of the handheld power tool 10, can generate a movement of the hand guard lever 12, in particular a forward rotation of the hand guard lever 12, in order to trigger the brake, in particular to actuate the trigger element 60.The hand guard lever 12 is rotatably mounted on a hand tool housing 26 of the hand tool 10, in particular rotatably mounted about the rotation axis 38. The forward rotation of the hand guard lever 12 is a rotation of the hand guard lever 12 in the direction of the tool receiving area 62 (see also forward rotation direction 50 of a forward rotation of the hand guard lever 12 in Figure 1).

[0044] The handheld power tool 10 has a handheld power tool device 40. The handheld power tool 10, in particular the handheld power tool device 40, has a mechanical control unit 14 for controlling the movement of the hand guard lever 12. The movement behavior of the hand guard lever 12 is determined by the control unit 14.

[0045] By rotating the hand guard lever 12 forward from the neutral position of the hand guard lever 12, in particular relative to a control element 18 of the control unit 14, by at least 10°, preferably by at least 15°, and preferably by at least 20° about the rotation axis 38, the hand guard lever 12 can be moved into a release position of the hand guard lever 12. Moving the hand guard lever 12 into the release position releases the brake. To move the hand guard lever 12 from the neutral position to the release position or from the release position to the neutral position, an actuating force must be applied to the hand guard lever 12. The actuating force for moving the hand guard lever 12 from the neutral position to the release position or from the release position to the neutral position at an actuating point 70 of the hand guard lever 12 is between 20 N and 60 N. The actuating point 70 is located at a free end 72 of the hand guard lever 12.A distance of the actuation point 70 to the rotation axis 38 is preferably between 100 mm and 140 mm, preferably between 110 mm and 130 mm and particularly preferably 120 mm.

[0046] The control unit 14 has at least the mechanical control element 18. The control element 18 is provided to control a rotational movement of the hand guard lever 12 by an axial relative movement between the control element 18 and the hand guard lever 12. The axial relative movement between the control element 18 and the hand guard lever 12 occurs at least parallel to the rotation axis 38 of the hand guard lever 12. The relative movement between the control element 18 and the hand guard lever 12 occurs along the rotation axis 38 of the hand guard lever 12. The rotation axis 38 preferably corresponds to an axial movement axis 74 of the axial relative movement between the control element 18 and the hand guard lever 12. The hand guard lever 12 is fixed in the axial direction, in particular relative to the handheld power tool housing 26. The control element 18 is movable in the axial direction, in particular relative to the handheld power tool housing 26.Alternatively, it is conceivable for the hand guard lever 12 to be movable in the axial direction, in particular relative to the handheld power tool housing 26, and for the control element 18 to be fixed in the axial direction, in particular relative to the handheld power tool housing 26. Furthermore, it is alternatively conceivable for the hand guard lever 12 and the control element 18 to be movable in the axial direction, in particular relative to the handheld power tool housing 26. By rotating the hand guard lever 12 about the rotation axis 38, an axial movement of the control element 18, in particular a movement of the control element 18 along the rotation axis 38, can be generated.

[0047] The control element 18 has a plurality of control surfaces 20, 46 configured for axial displacement (in Figure 3, for clarity, only a selection of the control surfaces 20, 46 of the control element 18 is provided with reference numerals). Alternatively, it is conceivable for the control element 18 to have a different number of control surfaces 20, 46 than the number of control surfaces 20, 46 shown here as an example, but in particular to have at least one control surface 20, 46. Through the interaction of at least some of the control surfaces 20, 46 with the hand guard lever 12, an axial relative movement can occur between the control element 18 and the hand guard lever 12. During a rotational movement of the hand guard lever 12, the hand guard lever 12 interacts with at least some of the control surfaces 20, 46 to generate the axial relative movement between the hand guard lever 12 and the control element 18.A respective main extension plane of the control surfaces 20, 46 is inclined, in particular at an angle other than 90°, to the rotation axis 38. The control surfaces 20, 46 are flat. Alternatively, however, it is also conceivable for the control surfaces 20, 46 to be at least partially curved. Two of the control surfaces 20, 46 are each part of a ramp element 76 of the control element 18.

[0048] The control element 18 has a plurality of ramp elements 76 (in the figures, only one of the ramp elements 76 is provided with a reference numeral). Alternatively, it is conceivable for the control element 18 to have a number of ramp elements 76 that differs from the number of ramp elements 76 of the control element 18 shown here. The ramp elements 76 are triangular in shape, in particular as two-sided ramps, preferably without a center piece. Two of the control surfaces 20, 46 correspond to sides of the preferably two-sided ramps. The ramp elements 76 and / or the control surfaces 20, 46 are arranged, preferably uniformly, around the rotation axis 38, in particular around the axial movement axis 74. The ramp elements 76 of the control element 18 have two different types of ramp elements 76, which differ in a ramp height and a ramp width.The two types of ramp elements 76 are arranged alternately around the rotation axis 38, in particular around the axial movement axis 74. The ramp heights of the ramp elements 76 run at least substantially parallel to the rotation axis 38, in particular to the axial movement axis 74. The ramp widths of the ramp elements 76 run in a circumferential direction that extends in a plane perpendicular to the rotation axis 38, in particular to the axial movement axis 74.

[0049] The ramp elements 76, in particular the control surfaces 20, 46, form a zigzag-shaped course, in particular around the axial movement axis 74 and / or the rotation axis 38. The respective main extension planes of the control surfaces 20, 46 enclose a corresponding angle with a plane running perpendicular to the rotation axis 38, in particular the axial movement axis 74.

[0050] The control unit 14 has at least one further mechanical control element 22. The control element 18 and the further control element 22 have complementary control surfaces 20, 24, 42, 44, 46, 48 configured for axial displacement. The further control element 22 has a plurality of control surfaces 24, 42, 46, 48 configured for axial displacement (for clarity, only a selection of the control surfaces 24, 42, 46, 48 of the further control element 22 is provided with reference numerals in the figures). Alternatively, it is conceivable for the further control element 22 to have a different number of control surfaces 24, 42, 46, 48 than the number of control surfaces 24, 42, 46, 48 shown here as an example. The further control element 22 has a plurality of ramp elements 78, 80 (in the figures, only two of the ramp elements 78, 80 are provided with reference numerals).Alternatively, it is conceivable for the further control element 22 to have a number of ramp elements 78, 80 that differs from the number of ramp elements 78, 80 of the further control element 22 shown here. The ramp elements 78, 80 of the further control element 22 are designed to be complementary, in particular analogous, to the ramp elements 76 of the control element 18. The control surfaces 24, 42, 46, 48 of the further control element 22 are designed to be complementary, in particular analogous, to the control surfaces 20, 46 of the control element 18. The ramp elements 78, 80 of the further control element 22 have two different types of ramp elements 78, 80, which differ in a ramp height and a ramp width. The two types of ramp elements 78, 80 are arranged alternately around the rotation axis 38, in particular around the axial movement axis 74.

[0051] By means of a rotational movement of the hand protection lever 12, in particular relative to the control element 18, an axial relative movement between the control element 18 and the hand protection lever 12, in particular the further control element 22, can be generated through the interaction of the complementary control surfaces 20, 24, 42, 44, 46, 48 of the control element 18 and the further control element 22. Interacting, in particular adjacent, control surfaces 20, 24, 42, 44, 46, 48, preferably at least their main extension planes, of the control element 18 and the further control element 22 extend at least substantially parallel to one another.

[0052] The additional control element 22 is connected to the hand guard lever 12 in a rotationally fixed manner. The additional control element 22 is formed integrally with at least part of the hand guard lever 12. Alternatively, however, it is also conceivable for the additional control element 22 to be fastened, in particular detachably, to the hand guard lever 12 by means of a screw connection, a snap-in connection, a clamp connection, a rivet connection, or the like. The additional control element 22 is rigidly connected to the hand guard lever 12. The additional control element 22 rotates about the rotation axis 38 relative to the control element 18 during a rotational movement of the hand guard lever 12 about the rotation axis 38.A rotation of the further control element 22 relative to the control element 18 generates, in particular upon a rotation of the hand protection lever 12 relative to the control element 18 about the rotation axis 38, an axial relative movement between the control element 18 and the hand protection lever 12, in particular the further control element 22.

[0053] The handheld power tool housing 26 has a bearing unit 28 for supporting at least part of the control unit 14 (see Figure 4). The bearing unit 28 is provided for the rotationally fixed mounting of the axially movable control element 18. The bearing unit 28 has at least one bearing element 82 for the control element 18. The control element 18 is mounted on the handheld power tool housing 26 in a rotationally fixed manner, in particular about the rotation axis 38 and / or the axial movement axis 74, at least in one operating state, by means of the bearing element 82. The control element 18 is connected to the handheld power tool housing 26 by means of the bearing element 82, movably mounted in the axial direction, in particular along the movement axis 74, preferably along the rotation axis 38. The bearing element 82 is formed integrally with at least part of the handheld power tool housing 26.Alternatively, it is also conceivable that the bearing element 82 is fastened, in particular detachably, to the hand-held power tool housing 26 by means of a screw connection, a snap-in connection, a clamp connection, a rivet connection or the like.

[0054] The bearing element 82 has a shape complementary to a free end 84 of the control element 18. The control surfaces 20, 46 of the control element 18 and / or the ramp elements 76 of the control element 18 are arranged at a further free end 86 of the control element 18. The free end 84 of the control element 18 is arranged remote from the further free end 86 of the control element 18. The control element 18 is connected to the bearing unit 28, in particular the bearing element 82, on a side remote from the control surfaces 20, 46 of the control element 18 and / or the ramp elements 76 of the control element 18. The bearing unit 28 has at least one further bearing element 88 for the hand guard lever 12. The hand protection lever 12 is mounted on the hand tool housing 26, in particular via a bearing sleeve 106 of the hand protection lever 12, by means of the further bearing element 88 so as to be rotatable, in particular about the rotation axis 38 and / or the axial movement axis 74.The hand guard lever 12 is fastened to the handheld power tool housing 26 by means of a fastening element 108, preferably via the bearing sleeve 106. The fastening element 108 is designed as a screw. Alternatively, it is conceivable for the fastening element 108 to be designed as a rivet or the like and / or for the hand guard lever 12 to be fastened to the handheld power tool housing 26 by means of a clamping connection, a snap-in connection, or the like, preferably via the bearing sleeve 106. The hand guard lever 12 is fixed to the handheld power tool housing 26 in the axial direction, in particular along the movement axis 74, preferably along the rotation axis 38, by means of the further bearing element 88. The further bearing element 88 is formed integrally with at least part of the handheld power tool housing 26.Alternatively, it is also conceivable that the further bearing element 88 is fastened, in particular detachably, to the hand-held power tool housing 26 by means of a screw connection, a snap-in connection, a clamp connection, a rivet connection or the like.

[0055] The bearing unit 28 specifies at least one arrangement angle of the control element 18 on the bearing unit 28. The bearing unit 28, preferably the bearing element 82, allows the control element 18 to be mounted on the bearing unit 28 only in one or more angular positions of the control element 18 relative to the bearing unit 28, in particular the bearing element 82. The bearing element 82 has a bearing contour 90, which is in particular complementary to a bearing connection contour 92 of the control element 18. The bearing contour 90 of the bearing element 82 allows the control element 18 to be mounted only in one or more angular positions of the control element 18 relative to the bearing unit 28, in particular the bearing element 82. The bearing element 82, in particular the bearing contour 90, has one or more projections 94, one or more recesses 96, a combination of these or the like.The control unit 14 is provided to allow, starting from the neutral position of the hand guard lever 12, a forward rotation and a reverse rotation of the hand guard lever 12 relative to the control element 18. The reverse rotation of the hand guard lever 12 is a rotation of the hand guard lever 12 in a direction opposite to the forward rotation of the hand guard lever 12. The reverse rotation of the hand guard lever 12 is a rotation of the hand guard lever 12 in a direction facing away from the tool receiving area 62. The reverse rotation of the hand guard lever 12 is a rotation of the hand guard lever 12 directed in the direction of the handle 54 and / or the further handle 56 (see also the reverse rotation direction 52 of a reverse rotation of the hand guard lever 12 in Figure 1). The reverse rotation of the hand guard lever 12 is a rotation of the hand guard lever 12 around the rotation axis 38.

[0056] The control unit 14 has at least one spring element 30. The spring element 30 is designed as a helical spring. Alternatively, it is also conceivable for the spring element 30 to be designed as a torsion spring, a rubber-elastic element, or the like. The control unit 14 has precisely one spring element 30, in particular the one already mentioned. Alternatively, however, it is also conceivable for the control unit 14 to have a plurality of spring elements 30, in particular to apply a force to the control element 18 in the direction of the hand guard lever 12.

[0057] The spring element 30 is provided to apply a force to the control element 18 in the direction of the hand guard lever 12. The spring element 30 is arranged, at least in one operating state, between the control element 18 and the handheld power tool housing 26. The spring element 30 bears against the handheld power tool housing 26, in particular with a free end 98 of the spring element 30. The spring element 30 bears against the control element 18, preferably a contact surface 102 of the control element 18, in particular with a further free end 100 of the spring element 30. The free end 98 of the spring element 30 is arranged facing away from the further free end 100 of the spring element 30. A main extension plane of the contact surface 102 runs at least substantially perpendicular to the rotation axis 38 and / or the movement axis 74.A movement of the control element 18 along the axial movement axis 74, in particular along the rotation axis 38, generates a compression or extension of the spring element 30. An extension and / or compression axis of the spring element 30 runs, at least in one operating state, at least substantially parallel to the rotation axis 38 and / or the axial movement axis 74. In order to move the hand protection lever 12 rotationally, an actuating force must be applied counter to the spring force that can be generated by the spring element 30.

[0058] The spring element 30 encloses the control element 18 at least partially, preferably at least substantially completely, more preferably completely, in particular at least viewed in a direction parallel to the axis of rotation 38 (see Figure 5) in at least one operating state. The spring element 30 encloses the bearing element 82 and / or the further bearing element 88 at least partially, preferably at least substantially completely, and particularly preferably completely, in particular at least viewed in the direction parallel to the axis of rotation 38, in particular the axis of movement 74, in at least one operating state. The spring element 30 completely encloses the bearing sleeve 106 of the hand protection lever 12, in particular at least viewed in the direction parallel to the axis of rotation 38, in particular the axis of movement 74.

[0059] The spring element 30 automatically moves the hand guard lever 12 into the neutral position after a backward rotation of the hand guard lever 12, starting from the neutral position of the hand guard lever 12. The complementary control surfaces 20, 24, 42, 44, 46, 48 of the control element 18 and the further control element 22 are configured such that, by means of the spring element 30, an automatic movement of the hand guard lever 12 into the neutral position can be generated after a backward rotation of the hand guard lever 12, starting from the neutral position of the hand guard lever 12.

[0060] The control unit 14 has a stop element 32. The stop element 32 is provided to limit a backward rotation of the hand guard lever 12 starting from the neutral position. The stop element 32 is provided to limit a backward rotation of the hand guard lever 12 starting from the neutral position by the hand guard lever 12 stopping against the stop element 32. Alternatively, it is conceivable that a backward rotation of the hand guard lever 12 starting from the neutral position is limited by the control element 18 stopping against the stop element 32. An outer wall 34 of the handheld power tool housing 26 has the stop element 32, which is provided to limit a backward rotation of the hand guard lever 12 starting from a neutral position of the hand guard lever 12. The stop element 32 is designed as a stop edge. The hand protection lever 12 has a stop surface 58 complementary to the stop element 32.

[0061] The stop element 32 defines a stop position of the hand guard lever 12. The neutral position is in particular different from the release position and / or the stop position. The neutral position is arranged between the release position and the neutral position. The neutral position and / or the release position are / is stationary positions of the hand guard lever 12. In order to move the hand guard lever 12 from a stationary position of the hand guard lever 12, preferably the release position or the neutral position, an actuating force must be applied to the hand guard lever 12. The stationary positions of the hand guard lever 12, in particular the release position and / or the neutral position, are defined by the control unit 14, in particular the complementary control surfaces 20, 24, 42, 44, 46, 48 of the control element 18 and the further control element 22.

[0062] The handheld power tool 10 has at least one actuating element 36, in particular a switching element, for triggering a handheld power tool function, in particular a safety function. The actuating element 36 can be actuated by a reverse rotation of the handguard lever 12 starting from a neutral position of the handguard lever 12. The handguard function can be, for example, an additional activation stage for starting up the handguard lever 10, a safety function, for example a trigger for the brake, an automatic system check of the handguard lever 10, or the like. The actuating element 36 can be actuated by the handguard lever 12 during a reverse rotation of the handguard lever 12 starting from the neutral position, for example, by a projection of the handguard lever 12 or the like.

[0063] The actuating element 36 can be actuated from the neutral position of the hand guard lever 12 by a reverse rotation of the hand guard lever 12 up to the stop element 32. It is conceivable that the actuating element 36 is arranged on the stop element 32 or at a distance from the stop element 32. The actuating element 36 is designed, for example, as a button, a lever, a gear element, or the like.

[0064] At least the control element 18 is arranged at least in the vicinity of a rotational axis 38 of the hand guard lever 12. The control element 18 is arranged in a closed manner around the rotational axis 38. The control element 18 encloses the rotational axis 38 at least substantially completely, preferably completely, in particular at least when viewed in the direction parallel to the rotational axis 38.

[0065] Figure 6 shows the hand guard lever 12 in the neutral position. In the neutral position, a control surface 24 of the additional control element 22 rests against a control surface 20 of the control element 18. A further control surface 42 of the additional control element 22 rests against a further control surface 46 of the control element 18. The ramp element 76 of the control element 18 is located, in particular stationary, in the neutral position in a recess defined by the control surface 24 of the additional control element 22 and the further control surface 42 of the additional control element 22.

[0066] By a forward rotation of the hand guard lever 12, starting from the neutral position about the rotation axis 38, the ramp element 76 of the control element 18 moves against a ramp element 78 of the ramp elements 78, 80 of the further control element 22, in particular, the control surface 20 of the control element 18 moves against the control surface 24 of the further control element 22, whereby the control element 18 moves in the axial direction relative to the hand guard lever 12, preferably counter to the spring force generated by the spring element 30. If a peak of the ramp element 76 exceeds a peak of the ramp element 78 due to a forward rotation of the hand guard lever 12, in particular starting from the neutral position, the hand guard lever 12 moves into the release position of the hand guard lever 12 (see Figure 7). In the trigger position, the control surface 20 of the control element 18 rests against an additional control surface 48 of the further control element 22.In the triggering position, the further control surface 46 of the control element 18 rests against a further additional control surface 44 of the further control element 22. The ramp element 76 of the control element 18 is located, in particular stationary, in the triggering position in a recess defined by the additional control surface 48 of the further control element 22 and the further additional control surface 44 of the further control element 22.

[0067] By a reverse rotation of the hand protection lever 12 starting from the neutral position about the rotation axis 38, the ramp element 76 of the control element 18 moves against a further ramp element 80 of the ramp elements 78, 80 of the further control element 22, in particular the further control surface 46 of the control element 18 moves against the further control surface 42 of the further control element 22, whereby in particular the control element 18 moves relative to the hand protection lever 12, preferably counter to the spring force that can be generated by the spring element 30, in the axial direction.During a reverse rotation of the hand guard lever 12 from the neutral position about the rotation axis 38, the ramp element 76 of the control element 18 moves against the further ramp element 80 of the ramp elements 78, 80 of the further control element 22, in particular, the further control surface 46 of the control element 18 moves against the further control surface 42 of the further control element 22, until the hand guard lever 12 strikes the stop element 32. When the hand guard lever 12 strikes the stop element 32, the hand guard lever 12 is in the stop position (see Figure 8). The stop position is different from a stationary position of the hand guard lever 12.The control unit 14 is provided to automatically move the hand guard lever 12 from the stop position to the neutral position by means of the spring element 30, in particular when the hand guard lever 12 is free of a correspondingly opposing actuating force, for example, from an operator or another load. The ramp element 78 of the further control element 22, which in particular must be exceeded to move the hand guard lever 12 from the neutral position to the release position or from the release position to the neutral position, is smaller than the further ramp element 80 of the further control element 22. In particular, a ramp height and / or a ramp width of the ramp element 78 of the further control element 22 is smaller than a ramp height and / or a ramp width of the ramp element 80 of the further control element 22.

Claims

Claims 1. Hand tool (10), in particular a chainsaw, with a hand guard lever (12) and with at least one mechanical control unit (14) for controlling the movement of the hand guard lever (12) of the hand tool (10), characterized in that the control unit (14) has at least one mechanical control element (18) which is intended to control a rotational movement of the hand guard lever (12) by an axial relative movement between the control element (18) and the hand guard lever (12).

2. Hand tool (10) according to claim 1, characterized in that the control element (18) has at least one control surface (20) designed for axial displacement.

3. Hand tool (10) according to claim 1 or 2, characterized in that the control unit (14) has at least one further mechanical control element (22), wherein the control element (18) and the further control element (22) have complementary control surfaces (20, 24) designed for axial displacement, wherein in particular the further control element (22) is connected to the hand protection lever (12) in a rotationally fixed manner.

4. Hand tool (10) according to one of the preceding claims, characterized by a hand tool housing (26) which has at least one bearing unit (28) for mounting at least part of the control unit (14), in particular for a rotationally fixed mounting of the axially movable control element (18).

5. Hand tool (10) according to claim 4, characterized in that the bearing unit (28) specifies at least one arrangement angle of the control element (18) on the bearing unit (28). Hand-held power tool (10) according to the preamble of claim 1, in particular according to one of the preceding claims, characterized in that the control unit (14) is provided to allow, starting from a neutral position of the hand-guard lever (12), a forward rotation and a reverse rotation of the hand-guard lever (12) relative to the control element (18). Hand-held power tool (10) according to one of the preceding claims, characterized in that the control unit (14) has at least one spring element (30), in particular a helical spring, which is provided to apply a force to the control element (18) in the direction of the hand-guard lever (12), wherein in particular the spring element (30) at least partially encloses the control element (18) in at least one operating state.Hand-held power tool (10) according to claim 6, characterized in that the spring element (30) automatically moves the hand-guard lever (12) into the neutral position after a reverse rotation of the hand-guard lever (12) starting from a neutral position of the hand-guard lever (12). Hand-held power tool (10) according to one of the preceding claims, characterized in that the control unit (14) has a stop element (32) which is provided to limit a reverse rotation of the hand-guard lever (12) starting from a neutral position of the hand-guard lever (12), in particular by the hand-guard lever (12) stopping against the stop element (32). Hand-held power tool (10) according to claim 9, characterized by a hand-held power tool housing (26), wherein an outer wall (34) of the hand-held power tool housing (26) has the stop element (32). Hand-held power tool (10) according to one of the preceding claims, characterized by at least one actuating element (36), in particular a switching element, for triggering a hand-held power tool function, in particular a safety function, which actuable by a reverse rotation of the hand-guard lever (12) starting from a neutral position of the hand-guard lever (12). Hand-held power tool (10) according to claims 9 and 11, characterized in that the actuating element (36) can be actuated starting from the neutral position of the hand-guard lever (12) by a reverse rotation of the hand-guard lever (12) up to the stop element (32). Hand-held power tool (10) according to one of the preceding claims, characterized in that at least the control element (18) is arranged at least in a vicinity of a rotational axis (38) of the hand-guard lever (12), in particular is arranged closed around the rotational axis (38).Hand-held power tool device (40) for a hand-held power tool (10), in particular a chainsaw, with at least one mechanical control unit (14) for controlling the movement of a hand-guard lever (12) of the hand-held power tool (10), characterized in that the control unit (14) has at least one mechanical control element (18) which is provided for controlling a rotational movement of the hand-guard lever (12) by an axial relative movement, in particular at least substantially along a rotational axis (38) of the hand-guard lever (12), between the control element (18) and the hand-guard lever (12).

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