WO2020083870A1

WO2020083870A1 - Actuation unit

Info

Publication number: WO2020083870A1
Application number: PCT/EP2019/078651
Authority: WO
Inventors: Aaron Kelly; Tamas Koncsik
Original assignee: Robert Bosch Gmbh
Priority date: 2018-10-22
Filing date: 2019-10-22
Publication date: 2020-04-30
Also published as: DE102018217991A1; CN112912213B; CN112912213A

Abstract

The invention relates to an actuation unit for actuating a hand-held power tool, in particular a garden machine, which has a drive tool, said actuation unit comprising an actuating element for controlling the drive unit in an open-loop or closed-loop manner and a release element for releasing an actuation of the actuating element. According to the invention, an actuating force for actuating the release element is at least partly reduced in accordance with an actuation of the release element, in particular from an idle state to an actuation state.

Description

description

title

Actuator

The invention relates to an actuating unit according to the preamble of claim 1.

State of the art

Handheld power tools are known which have an actuating element and a release element. To operate the handheld power tool, the release element must remain depressed by applying and holding an actuating force to the release element. In such a handheld power tool, the actuating force is constant, so that when the release element is actuated, the actuating force must be maintained during the entire actuation process.

Disclosure of the invention

The invention has for its object with simple constructive

Measures to improve an actuator.

The object is achieved with an actuation unit for actuating a handheld power tool having a drive unit, in particular a garden machine, with an actuation element for controlling or regulating the drive unit and a release element for releasing actuation of the actuation element.

It may be expedient for an actuating force to actuate the release element as a function of an actuation of the release element, in particular reduced from an idle state to an actuated state, at least in sections.

The release element is usually actuated with a certain force, for example in order to comply with a safety requirement for the actuation unit, which is intended to prevent the handheld power tool from starting up unintentionally and possibly being operated. This

According to the safety requirement, for example, the release element should be subjected to a force of, for example, 20 Nm or higher in order to release the actuating element. For operators of the

Hand-held power tools can be 20 Nm, which should be kept in the long run in order to maintain operation of the hand-held power tool, can be stressful and uncomfortable.

By means of the actuating unit according to the invention, an action of force on the release element can be limited and at the same time any

Safety requirements for the hand machine tool are met.

As a result, the actuation unit can be actuated particularly reliably by maintaining a minimum actuation force required for actuation of the release element and a lower actuation force being required during or after actuation of the release element in order to keep the release element in the actuation state.

The hand tool can also be designed as a hand-held and / or a hand-held hand tool. The

Hand tool can be designed as a garden machine, which in particular as a lawn mower, a mulcher, a snow blower,

Hedge trimmer, chainsaw or the like is formed.

In this context, a “drive unit” is to be understood in particular to mean a unit which is provided for this purpose, at least one

Generate drive torque and make it available for forwarding to an output unit, in particular to an accessory tool. The handheld power tool advantageously has the drive unit. Particularly advantageously points the drive unit has at least one electric motor. The drive unit can have a drive shaft. The drive unit can be designed as an electronically commutated motor or as a brush commutated motor. The output unit can have a receptacle for receiving a tool, in particular an accessory tool, which is intended to transmit a working movement to a workpiece to be machined.

An “actuation unit” is to be understood here to mean, in particular, a unit which has at least one component which can be actuated directly by an operator and which is provided for actuating and / or entering parameters to process and / or state a to influence and / or change the unit coupled to the control unit. The actuation unit is in particular intended to enable two-way operation, in particular to be able to ensure that the actuation element is released after actuation of the release element. The actuation unit, in particular the actuation element, can be provided to drive the drive unit directly, in particular by means of the

Actuating element, or indirectly, in particular by means of an electronic unit, to control or regulate. An “actuating element” is to be understood in particular to mean an element that is provided for one

Actuation process to record an input variable from an operator and in particular to be contacted directly by an operator, touching the actuating element sensing and / or touching the

Actuating element is sensed and / or mechanically transmitted to actuate a unit. The actuating element is preferably provided to activate or control and / or regulate the handheld power tool, in particular the drive unit and / or an electronic unit of the handheld power tool.

In particular, the actuating force can be applied to the release element by means of a hand, in particular the palm of an operator's hand, preferably by the release element relative to a housing of the

Actuator is moved. The release element should preferably form a safety function by means of which a handheld power tool can be prevented from being operated unintentionally. The release element should preferably be provided to release the actuating element. The release element can be provided to release the actuating element electronically and / or mechanically.

The release element can be designed as a switch element. The release element can be designed as a pawl. The

Release element can be designed as a touch-sensitive actuating element, which is provided in particular for a touch and / or an approach by an operator, in particular a

Approach of a part of the body, for example a finger, of an operator, in particular within a distance of a maximum of 10 cm, in particular a maximum of 3 cm, advantageously a maximum of 1 cm, preferably a maximum of 0.5 cm. The actuating element preferably reacts independently of direct contact and / or pressure, in particular by means of

Contact surface on an approximation. In particular, the

Contact surface designed as a glass and / or plastic unit.

The release element is preferably provided to enable an actuation of the actuation element, so that an operator of the

Hand machine tool actuates the hand tool machine when the actuating element is actuated, in particular in order to operate it.

“At least reduced in sections” is to be understood in particular to mean that a force, in particular an actuating force, is reduced when actuated, in particular the release element, so that

in particular the actuating force becomes smaller as a function of a travel path of the actuating element.

The subclaims indicate further expedient developments of the handheld power tool according to the invention.

It can be expedient for the actuating force to be variable as a function of a position of the actuating element and / or of the release element. For example, the actuating force for actuating the

Release element be at least in sections maximum. The actuation force can have a high point or be a maximum between approximately a first quarter and a last quarter of the actuation path or the position of the release element. In a rest position, the release element is in an idle state. In an actuation state of the actuation unit, the release element is actuated such that the release element

Actuator releases. Here, the release element can be kept in the actuation state in a particularly simple manner.

In this context, a variable actuating force is to be understood as an actuating force which is dependent on a

Operating state or an actuation path changes. For example, the actuation force can range from one idle state to one

Actuation status increase. For example, the actuating force can decrease from an idle state to an actuated state. In particular, the actuating force can decrease after the actuation state has been reached. The actuation force is preferably not constant as a function of the actuation state or the actuation path.

It can be expedient that the actuating force can be set in such a way that the release element is at least in sections by means of a first

Actuating force can be moved from an idle state into an actuating state and the release element can be kept in the actuated state by means of a second actuating force. In particular, the first actuating force, in particular by at least 50%, preferably by at least 100%, preferably by at least 150%, particularly preferably by 200%, is greater than the second actuating force. The first and the second actuating force differ only in their amount and in particular represent a force effect on the release element, which serves to keep the release element in a state. The first actuating force can be, for example, more than 10 N, in particular more than 15 N, preferably more than 20 N, and for example with a tolerance of 1 N. The second actuating force can

for example less than 10 N, in particular less than 8 N,

preferably less than 5 N. The first actuating force can represent a force threshold which an operator has to exceed from a safety point of view in order to use the To be able to actuate the actuating element. The force threshold or

Actuating force can form a high point of an actuating force acting on the release element. This can ensure that the actuating unit or the handheld power tool is not operated accidentally.

Furthermore, it may be appropriate for the actuation unit to be a

Resistance element which, when the

Release element is provided to act upon the

Ensure release element with a / the, in particular first, actuating force. The resistance element can be provided to set an actuating force acting on the release element, in particular to set the release element into the actuation state and that

Release actuator. The resistance element can generate a counterforce or reaction force which counteracts an actuation force acting on the release element. The actuating force can be set by means of the resistance element in such a way that when the release element is actuated, a force threshold or a / the first actuation force is reached in order to set the release element into an actuation state in which an actuation of the actuation element is released. A “resistance element” is to be understood in particular to mean an element which has at least one extension, which in a normal operating state can be elastically changed by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50%, and that one in particular

Change in extension dependent and preferably proportional to the change generated counterforce that counteracts the change. The resistance element can be designed or arranged in such a way that the release element is set into the actuation state when a force threshold or the, in particular first, actuation force of a force acting on the release element is reached or exceeded. Alternatively or additionally, the resistance element can have or consist of a latching element. The latching element can be designed such that the release element is to be acted upon by the first actuating force in order to overcome a latching position or to transition from the idle state to the actuated state. Furthermore, it may be appropriate that the resistance element as

Bending resistance element or is designed as a tension or compression resistance element. This allows a

Security function can be provided.

Furthermore, it can be expedient for the release element and / or the actuating element to be movably, in particular rotatably, movably mounted. The release element can be rotatably mounted about a release axis of rotation. The actuating element can be rotatably mounted about an actuation axis of rotation. The release axis of rotation and the actuation axis of rotation can be arranged parallel to one another. The release axis of rotation and the

Actuating axis of rotation can on the side facing away from each other

Actuating unit can be arranged. The release element and that

Actuating elements can be movably mounted in the same direction or clockwise or counterclockwise, in particular in order to be brought from an idle state into an actuated state. As a result, the release element or the actuating element can be actuated particularly simply and intuitively.

Furthermore, it can be expedient for the release element to be rotatably supported by a smaller angular range than the actuating element. The angular range of the release element can be in a range of up to 15 °, in particular up to 10 °, preferably up to 6 °. The

Angular range of the actuating element can be in a range of more than 5 °, in particular more than 10 °, preferably more than 15 °. Handling of the control unit can thereby be improved.

Furthermore, it may be expedient for the control unit to have a

Has guide unit which is provided to guide the actuating element relative to the release element. In particular that is

Release element movably mounted with respect to the actuating element.

In particular, the actuating element is guided on the release element. The actuating element can be guided as a function of the release element. The release element can exert a constraining force on the actuating element in at least the actuated state by one To specify the possibility of movement of the actuating element. The

Guide unit can be provided to actuate the

To lock the actuator in an idle state of the release element.

It is proposed that the guide unit has a first guide element assigned to the release element and a second guide element assigned to the actuating element, the second

Guide element is guided in or on the first guide element. The first guide element is preferably designed as a guide groove. The second guide element is preferably designed as a guide elevation and in particular as a guide pin. The second can

Guide element to be guided in the first guide element. The first guide element can be formed in one piece with the release element.

The second guide element can be formed in one piece with the actuating element. As a result, the release element and / or the

Actuating element can be kept in an actuating state in a particularly simple manner.

It is also proposed that the release element be a first

Has guide contour and a second guide contour, the second guide contour being arranged at least substantially transversely to the first guide contour. The second guide contour can be curved. The second guide contour can have a contour radius which is one

Movement radius of the second guide element corresponds essentially when the actuating element is actuated in at least one state.

It is further proposed that the actuating element in one

Actuation state of the actuating element, the release element,

in particular by means of the guide unit, in an actuated state of the release element. It is also suggested that the

Actuating element in an actuating state of the actuating element, the release element, in particular by means of the guide unit, in one

Operating state limits movement of the release member. As a result, an operator of the handheld power tool can be relieved by essentially holding the release element in the actuated state. It may be appropriate for the release element and / or the

Actuating element have a return spring element, which are provided to set the release element and / or the actuating element from an actuating state to a rest state. The

Return spring element can be designed as a leg spring. The return spring element can on the release axis of rotation or

Actuating axis of rotation can be arranged and surround it in particular.

As a result, resetting can be carried out in a particularly compact manner.

Furthermore, it may be expedient for the actuating unit to have a rotary element which is coupled to the resistance element and is intended to tension the resistance element in a first state and to relax in a second state by rotating the rotary element. The rotary element can be provided for that

To press or compress the resistance element in an actuation state of the release element against the release element. The rotary element can have a grid which is provided to block a rotary movement in one direction and to release it in an opposite direction. The rasterization can be designed such that when a / the first actuating force acts on the release element, a latching position of the rotary element is overcome, in particular to set the rotary element in rotation. The release element transmits the actuating force to the resistance element, as a result of which the resistance element in particular is tensioned against the rotating element or a latching position of the rotating element in such a way that the latching position is overcome, as a result of which the release element in particular changes from an idle state to an actuated state. A “grid” is to be understood in particular as a device which, in at least one operating state, generates a force by counteracting an uneven surface, which counteracts movement. As a result, an actuating force of the release element can be set in a particularly simple manner.

It is proposed that the rotating element be designed such that the rotating element rotates when a force threshold acting in the direction of rotation is exceeded. The rotary element can be designed as a rotary wheel element be. The rotating element is rotatably supported about an axis of rotation. In particular, the resistance element is coupled eccentrically to the rotary element. As a result, a first actuating force when actuating the release element can be limited particularly reliably.

It is further proposed that the actuating element be arranged on a side of a handle facing away from the release element. This enables a particularly advantageous one-hand operation.

The invention further relates to a handheld power tool,

in particular a garden machine, with an actuating unit for actuating a hand tool, in particular a drive unit of the

Hand tool.

Brief description of the drawings

Further advantages result from the following description of the drawing. Exemplary embodiments of the invention are shown in the drawing. The

Drawings, the description and the claims contain numerous

Characteristics in combination. Those skilled in the art will understand the features

expediently also consider individually and to meaningful others

Combine combinations. Here shows:

Fig. 1 shows a part of an exemplary hand tool from the

State of the art,

Fig. 2 shows three sectional views of an inventive

Actuating unit of the invention

Hand tool,

Fig. 3 is a perspective sectional view of an inventive

Actuating unit of the invention

Hand machine tool from Fig. 2,

4 and 5 three sectional views of two more

Implementation forms of the invention

Hand tool and Fig. 6 shows a force of the actuating unit.

In the following figures, the same components are provided with the same reference symbols.

The figures relate to a hand tool 11 designed as a garden machine, such as a grass trimmer or hedge trimmer with a drive unit 13 designed as an electric motor for driving the hand tool 11 and with an actuating unit 19 for actuating the hand tool 11. The drive unit 13 is provided for this purpose. to transmit a drive movement to a receptacle of an output unit 15 which can be coupled or coupled to an accessory tool 17.

The hand tool 11 is designed as a hand-held and / or a hand-held hand tool 11. The

Hand tool 11 may alternatively or additionally be designed as a lawn mower, a mulcher, a snow blower, a hedge trimmer, a chainsaw or the like.

The actuation unit 19 has an actuation element 21 designed as an actuation lever 21 for controlling or regulating the drive unit 13 and a release element 23 designed as a release lever 23 for releasing actuation of the actuation element 21. An actuating force 27, which is variable, is provided for actuating the release lever 23. The

Operating force 27 changes, in particular reduced, depending on an operating state or an actuation path 28

Release lever 23 include several operating states, which of

Release lever 23 assumes if the release lever 23 by a

Hibernation in until an actuation state is placed. The actuating force 27 can increase when the release element 23 is actuated and exceed a high point 25 (FIG. 6). Then the

Actuation force 27 after overcoming the high point 25 or when reaching an actuation state decrease in order to hold the

To facilitate release lever 23 in an operating state. 6 shows a first actuation force curve 101 of the release lever 23, in which the actuation force 27 increases and the high point 25 is reached with a movement path 28 or a rotation angle of between 2 ° to 3 °, for example 2.5 °, and then drops again, to enable a more comfortable operation. The actuating force exceeds the force threshold of 20 N and in this example reaches 25 N at 2.5 ° and drops in an end point of the actuation state or when the release element strikes to about 5 N at 5 °.

The actuation unit 19 is essentially designed as an actuation handle 19 and is provided to enable two-way operation in order to be able to ensure that the actuation lever 21 is released after actuation of the release lever 23. The actuating lever 21 is provided to control or regulate the drive unit 13 directly or by means of the actuating lever 21. The release lever 23 forms a safety function which is intended to prevent the handheld power tool 11 from being operated unintentionally. The release lever 23 is provided to release the actuating lever 21. The release lever 23 is provided to mechanically release the actuating lever 21. The release lever 23 is designed as a switch element. The release lever 23 is designed as a pawl. The release lever 23 is provided to enable the

Release actuating lever 21 so that an operator of the

Hand machine tool 11 actuates drive unit 13 when actuating lever 21 is actuated.

The actuating force 27 is dependent on a position of the

Release lever 23 changeable. The actuating force 27 has a high point 25 approximately between a first quarter and a last quarter of the actuation path 28 or the position of the release lever 23. In a rest position, the release lever 23 is in a rest state and in one

Operating position of the release lever 23 in an operating state in which the release lever 23 is operated such that the release lever 23 releases the operating lever 21. The actuating force 27 is set in such a way that the release lever 23 moves from a rest state into a by means of a first actuating force 27

Actuating state is displaceable and can be maintained in the actuating state by means of a second actuating force 27, the first actuating force 27 being greater than the second actuating force 27. The first actuating force 27 is more than 20 N. The second actuating force 27 is less than 10 N. The first actuating force 27 represents a force threshold which an operator has to exceed from a safety point of view in order to

To be able to actuate hand tool 11 by means of the actuating lever 21.

The actuating handle 19 has a spring element 31

Resistance element 31, which is provided when actuating the release lever 23 to ensure that the release lever 23 is acted upon by at least the first actuating force 27. The spring element 31 is provided to set an actuating force 27 acting on the release lever 23 in order to set the release lever 23 into the actuated state and to release the actuation lever 21. The spring element 31 forms a counterforce or reaction force which counteracts the actuating force 27 acting on the release lever 23. The actuating force 27 is adjusted by means of the spring element 31 such that when the

Release lever 23 a force threshold or the first actuating force 27 is reached to put the release lever 23 in an actuation state in which an actuation of the actuation lever 21 is released. The spring element 31 can be designed or arranged such that the release lever 23 is set into the actuation state when a force threshold or the first actuation force 27 of a force acting on the release lever 23 is reached or exceeded.

The spring element 31 is designed as a latching element (FIG. 3). The

Locking element is designed such that the release lever 23 to overcome a locking position or to transition from the idle state to the

Actuation state to be acted upon by the first actuation force 27. Furthermore, the spring element 31 is designed as a spiral spring element 31 (FIGS. 2, 4) or as a tension or compression spring element 31 (FIG. 5).

2, the spiral spring element 31 is prestressed with respect to the release element 23. The spiral spring element 31 is provided in one

To act in the rest state against a raster elevation of the release element 23 and to permit an actuation or an actuation state depending on the actuation force acting on the release element 23. At a

Actuation of the release element 23 with the first actuating force, the release element is tensioned against the grid elevation in such a way that the release element 23 deforms in order to overcome the grid elevation, cf. Fig. 2 middle and Fig. 2 left. The grid elevation can be designed asymmetrically, so that the rearward movement, that is from the actuation state to the rest state, has a lower force effect of the release element

It is necessary to overcome the raster elevation than when moving from the rest state into the actuation state.

4, the spiral spring element 31 is connected to the release element 23 on the one hand and to a housing of the actuation unit 19 on the other hand, so that an actuation force acting on the release element 23 to actuate the actuation unit 19 depends on an elastic deformability and / or the arrangement in the actuation unit 19 is. The spiral spring element 31 is provided to provide the actuating force 27 by means of a bending stress.

2, 4 and 5, the actuating units 19 are shown, the

Actuating unit in the left figure is in the idle state and actuating unit 19 in the right figure is in the operating state.

The release lever 23 and the operating lever 21 are rotatably mounted. The release lever 23 is mounted on a release axis of rotation 33 and the actuating lever 21 is rotatably mounted on an actuation axis of rotation 35. The release axis of rotation 33 and the actuation axis of rotation 35 are arranged parallel to one another. The release axis of rotation 33 and the

Actuating axis of rotation 35 are on the side facing away from one another Operating handle 19 arranged. The release lever 23 and the actuating lever 21 are mounted in the same direction and can be moved clockwise in order to be brought from an idle state into an actuated state.

The release lever 23 is rotatably supported relative to the actuating lever 21 by a smaller angular range. The angular range of the release lever 23 can be in a range of up to 15 °. The angular range represents a distance that the release lever 23 traverses, for example.

The actuation unit 19 has a guide unit 37, which is provided to guide the actuation lever 21 relative to the release lever 23. The release lever 23 is movably mounted relative to the actuating lever 21 and can be guided as a function of the actuating lever 21. In at least the actuation state, the release lever 23 exerts a constraining force on the actuation lever 21 in order to specify a possibility of movement of the actuation lever 21. The guide unit 37 is provided to block an actuation of the actuation lever 21 in an idle state of the release lever 23.

The guide unit 37 has a first guide element, which is assigned to the release lever 23 and is designed as a guide groove 39, and a

Actuating lever 21 assigned second guide element designed as a guide elevation 41. The guide elevation 41 is supported in or on the guide groove 39. The guide groove 39 is in one piece with the release lever 23 and the guide elevation 41 is in one piece with the

Actuating lever 21 formed.

The guide groove 39 has a first guide contour 43 and a second

Guide contour 45, wherein the second guide contour 45 is arranged at least substantially transversely to the first guide contour 43. The second guide contour 45 is curved. The second guide contour 45 has in

Essentially has a contour radius which essentially corresponds to a radius of movement of the guide elevation 41 when the actuation lever 21 is actuated in at least one actuation state. The

The operating lever 21 holds in an operating state of the operating lever 21 the release lever 23 at least non-positively by means of the guide unit 37 and the prestressed release lever 23 or actuation lever 21 and can thus limit a movement of the release lever 23.

The release lever 23 and the operating lever 21 each have

Return spring element 49, 51, which are provided for that

Preload release lever 23 and the actuating lever 21 in the actuated state and to bring them from the actuated state into an idle state. The return spring elements 49, 51 are each designed as a leg spring and are arranged on the release axis of rotation 33 and the actuation axis of rotation 35 and surround them. The return spring element 49 can be provided, for example, to close the release element at least partially with the second actuating force or a corresponding counterforce, in particular less than 10 N, preferably about 5 N

act upon. The resistance element 31 and or the restoring spring element 49 can be provided, for example, to act at least partially on the release element with the second actuating force or a corresponding counterforce such that the second actuating force, in particular of less than 10 N, preferably on the release element in an actuation state of about 5 N.

The return spring element 51 is provided for exerting a return force on the actuating lever 21 in such a way that the actuating lever 21 is moved from the actuated state into an idle state. The

The guide unit 37 is designed in such a way that the actuating lever 21 is moved from the actuated state into an idle state.

The actuating handle 19 has a rotary element 53 which is coupled to the tension-compression spring element 31 and is provided for this purpose

To tension spring element 31 in a first state and to relax in a second state by rotating the resistance element 31. The rotary element 53 is provided for the spring element 31 in one

To press or compress the actuation state of the release lever 23 against the release lever 23. The rotating element 53 has a raster, which is provided for a rotary movement 71 in one direction

To block essentially and in particular in an opposite direction to release. The grid is designed such that when a / the first actuating force 27 acts on the release lever 23, the first state or a latching position of the rotary element 53 is overcome in order to set the rotary element 53 in rotation, cf. 5 right. As a result, the compression spring element 31 can be relaxed. The grid forms one

Rotation. The rotary element 53 is designed as a rotary catch. The release lever 23 transmits the actuating force 27 to the spring element 31, as a result of which the spring element 31 can be tensioned against the rotary element 53 or a latching position of the rotating element 53 in such a way that the first state or the latching position is overcome, so that the release lever 23 by means of the

Rotary movement 71 passes from the rest state into the actuation state.

The rotating element 53 is designed such that the rotating element 53 rotates when a force threshold acting in the direction of rotation is exceeded. The rotary element 53 is designed as a rotary wheel element. The rotating element 53 is rotatably supported about an axis of rotation. The spring element 31 is eccentrically coupled to the rotary element 53.

The actuating lever 21 is arranged on a side of a handle facing away from the release lever 23.

Claims

Expectations

1. actuating unit for actuating a drive unit (13)

having hand tool (11), in particular one

Garden machine, with an actuating element (21) for controlling or regulating the drive unit (13) and a release element (23) for releasing an actuation of the actuating element (21), characterized in that an actuating force (27) for actuating the release element (23) depending on an actuation of the

Release element (23), in particular reduced from an idle state to an actuation state, at least in sections.

2. Actuating unit according to claim 1, characterized in that the actuating force (27) in dependence on a position of the

Actuating element (21) and / or the release element (23) is variable.

3. Actuating unit according to one of the preceding claims, characterized in that the actuating force (27) is adjustable in such a way that the release element (23) can be moved from an idle state into an actuated state at least in sections by means of a first actuating force (27) and the release element (23 ) by means of a second

Operating force (27) is stable in the operating state, the first operating force (27) being greater than the second operating force (27).

4. Actuating unit according to one of the preceding claims, characterized in that the actuating unit (19) has a resistance element (31) which, when the release element (23) is actuated, is intended to act upon the release element (23) with a / the, especially the first, to ensure actuating force (27).

5. Actuating unit according to one of the preceding claims, characterized characterized in that the resistance element (31) is designed as a spiral spring element (31) or as a tension or compression spring element (31).

6. Actuating unit according to one of the preceding claims, characterized in that the release element (23) and / or the

Actuating element (21) are movable, in particular rotatably movable.

7. Actuating unit according to one of the preceding claims, characterized in that the release element (23) compared to the

Actuating element (21) is rotatably supported around a smaller angular range.

8. Actuating unit according to one of the preceding claims, characterized in that the actuating unit (19) has a guide unit (37) which is provided to guide the actuating element (21) relative to the release element (23).

9. Actuating unit according to one of the preceding claims, characterized in that the guide unit (37) has a first guide element (39) assigned to the release element (23) and a second guide element (41) assigned to the actuating element (21), the second guide element in or on the first

Guide element is guided.

10. Actuating unit according to one of the preceding claims, characterized in that the release element (23) has a first guide contour (43) and a second guide contour (45), the second

Guide contour (45) at least substantially transversely to the first

Guide contour (43) is arranged.

11. Actuating unit according to one of the preceding claims, characterized in that the actuating element (21) in one

Operating state of the actuating element (21) holds the release element (23) in an actuated state of the release element (23) or limits movement of the release element (23).

12. Actuating unit according to one of the preceding claims, characterized in that the release element (23) and / or the

Actuating element (21) have a return spring element (49, (51), which are provided for releasing the release element (23) and / or the actuating element (21) from one actuating state into one

To put hibernation.

13. Actuating unit according to one of the preceding claims, characterized in that the actuating unit (19) has a rotary element (53) which is coupled to the resistance element (31) and is intended to tension the resistance element (31) in a first state and in a second state by rotating the

Relax rotary element (53).

14. Actuating unit according to one of the preceding claims, characterized in that the rotary element (53) is designed such that the rotary element (53) rotates when a force threshold acting in the direction of rotation is exceeded.

15. Actuating unit according to one of the preceding claims, characterized in that the actuating element (21) on one of the

Release element (23) facing away from a handle is arranged.

16. Hand tool, in particular garden machine, according to one of the preceding claims, with an actuating unit (19) for actuating a hand tool (11), in particular a drive unit (13) of the hand tool (11).