EP3389945B1 - Hand-held power tool in which the direction of rotation can be set - Google Patents

Description

State of the art

The present invention relates to a hand machine tool with a drive unit for rotatingly driving an output spindle, the drive unit being switchable between a first direction of rotation and a second direction of rotation in order to enable the output spindle to be driven in the first or second direction of rotation, with at least one operating element for initiating a Switching operation is provided for switching the drive unit between the first and second directions of rotation.

Hand machine tools of this type are known from the prior art, which have a drive unit with a drive motor for rotatingly driving an output spindle which can be switched between a first and a second direction of rotation. These handheld power tools have an operating element for initiating the switching process between the two different directions of rotation.

In addition, from the DE 201 07 583 U1 a handheld power tool with a monostable switch for reversing the direction of rotation is known, which comprises a circuit board with switching elements attached to it and a switching handle for actuating the switching elements. The switching handle is designed as a rocker switch or toggle switch for actuation, by tilting, either the one or the other switching element and is rotatably mounted on the housing of the handheld power tool. The monostable switch here comprises a spring bar which is unloaded in a stable central position of the switching handle and can be deflected in an elastically deformable manner by tilting the switching handle. Of the The monostable switch can thus operate two different switching elements from its stable central position.

Disclosure of the invention

The present invention provides a new hand machine tool with a drive unit for the rotary drive of an output spindle, the drive unit being switchable between a first direction of rotation and a second direction of rotation in order to enable the output spindle to be driven in the first or second direction of rotation, with at least one operating element for Initiation of a switching process for switching the drive unit between the first and second directions of rotation is provided. The at least one operating element is designed as a monostable switching element.

The invention thus makes it possible to provide a handheld power tool in which the operating element for initiating the switching process between the first and second direction of rotation is designed as a monostable switching element. A switchover of the drive unit between the first and second direction of rotation for a user of the handheld power tool can thus be made possible in a simple and uncomplicated manner.

The at least one operating element designed as a monostable switching element is preferably assigned a sensor unit which is designed to generate a corresponding actuation signal when the operating element is actuated. Signaling of the actuation of the operating element can thus be made possible in a simple manner.

The actuation signal can preferably be used to set a desired direction of rotation of the output spindle. This enables the current direction of rotation of the output spindle to be set safely and reliably.

The sensor unit preferably has a mechanical, electrical, magnetic and / or optical sensor. An actuation of the operating element can thus be detected in a cost-effective manner.

According to one embodiment, a direction of rotation detection unit is provided which is designed to detect a current direction of rotation of the drive unit. A current direction of rotation of the drive unit can thus be detected appropriately and reliably.

A direction of rotation detection unit is preferably provided which is designed to display a request to initiate a switchover process for switching the drive unit between the first and second directions of rotation when predetermined operating conditions occur. A request to initiate a switching process for switching the drive unit between the first and second directions of rotation can thus be displayed safely and easily.

The at least one operating element embodied as a monostable switching element preferably has a rocker switch, a push button or a slide. Thus, the at least one operating element designed as a monostable switching element can be implemented in a versatile and expedient manner.

The at least one operating element designed as a monostable switching element is preferably assigned at least one spring element, which acts on the operating element in a stable position. Thus, the at least one operating element designed as a monostable switching element can be safely and reliably acted upon in a stable position.

Preferably, the at least one operating element designed as a monostable switching element is provided with a lighting means and the lighting means is designed to display a request to initiate a switching process to switch the drive unit between the first and second direction of rotation when predetermined operating conditions occur. A request to initiate a switching process for switching the drive unit between the first and second direction of rotation can thus be displayed in a simple manner.

According to the invention, the drive unit has a drive motor and control electronics are provided which are designed to respond when the at least one operating element designed as a monostable switching element is actuated to effect a switching process for switching the drive motor between the first and second directions of rotation. Thus, actuation of the at least one operating element embodied as a monostable switching element can reliably and precisely cause a switching process for switching the drive motor between the first and second directions of rotation.

The control electronics are preferably designed to effect the switching process for switching the drive motor between the first and second directions of rotation only when the drive motor is at a standstill. It can thus be ensured in a reliable manner that the switching process for switching the drive motor between the first and second directions of rotation is only effected when the drive motor is at a standstill.

The control electronics are preferably designed to brake the drive motor to a standstill in order to enable the switching process for switching the drive motor between the first and second directions of rotation. Thus, the control electronics can initiate the switching process for switching the drive motor between the first and second direction of rotation, regardless of whether the drive motor is at a standstill or not.

According to one embodiment, the at least one operating element designed as a monostable switching element has a touch-sensitive screen. Thus, the at least one operating element designed as a monostable switching element can be operated in a simple manner.

The touch-sensitive screen is preferably designed to enable a request to initiate a switching process to be displayed to switch the drive unit between the first and second directions of rotation and to enable the switching process to be initiated. A display of a request to initiate a switchover process for switching the drive unit between the first and second direction of rotation and an initiation of the switchover process can thus take place in an uncomplicated manner and in a manner that is clearly recognizable for a user.

According to one embodiment, the handheld power tool is designed in the manner of a cordless screwdriver or cordless drill. Thus, the hand-held power tool with the at least one operating element designed as a monostable switching element can be implemented flexibly in the manner of a cordless screwdriver or a portable drill.

Brief description of the drawings

Fig. 1

eine perspektivische Ansicht einer Handwerkzeugmaschine mit einer Kommunikationsschnittstelle und mit einem Bedienelement zur Initiierung eines Umschaltvorgangs zum Umschalten einer Antriebseinheit zwischen einer ersten und zweiten Drehrichtung,

Fig. 2

eine teilweise geschnittene Seitenansicht der Handwerkzeugmaschine von Fig. 1 mit der Antriebseinheit,

Fig. 3

einen Längsschnitt der Antriebseinheit der Handwerkzeugmaschine von Fig. 1 und Fig. 2,

Fig. 4

eine perspektivische Seitenansicht des Bedienelements von Fig. 1 mit einer Schaltwippe gemäß einer Ausführungsform,

Fig. 5

eine perspektivische Seitenansicht der Schaltwippe von Fig. 4 in stabiler Ruheposition und in instabiler Schaltposition,

Fig. 6

eine teilweise Explosionsansicht der Schaltwippe von Fig. 4 und Fig. 5,

Fig. 7

eine perspektivische Seitenansicht des Bedienelements von Fig. 1 mit zwei Schaltwippen gemäß einer Ausführungsform,

Fig. 8

eine perspektivische Seitenansicht des Bedienelements von Fig. 1 mit einem Schieber gemäß einer Ausführungsform,

Fig. 9

einen Querschnitt eines zweiseitigen, monostabilen Schiebers gemäß einer Ausführungsform,

Fig. 10

einen Längsschnitt des zweiseitigen, monostabilen Schiebers von Fig. 9,

Fig. 11

eine perspektivische Teilansicht des Bedienelements von Fig. 1 gemäß einer Ausführungsform,

Fig. 12

eine perspektivische Teilansicht des Bedienelements von Fig. 1 mit einer Drucktaste gemäß einer Ausführungsform,

Fig. 13

eine perspektivische Teilansicht des Bedienelements von Fig. 1 gemäß einer Ausführungsform,

Fig.

14 eine perspektivische Teilansicht des Bedienelements von Fig. 13,

Fig. 15

ein schematisches Diagramm der Handwerkzeugmaschine von Fig. 1 mit dem beispielhaften Bedienelement und der Kommunikationsschnittstelle,

Fig. 16

eine perspektivische Ansicht eines Systems bestehend aus der Handwerkzeugmaschine von Fig. 1 und einer Bedieneinheit gemäß einer ersten Ausführungsform,

Fig. 17

ein Flussdiagramm eines interaktiven Programms zur Initiierung eines Umschaltvorgangs zum Umschalten einer Antriebseinheit zwischen einer ersten und zweiten Drehrichtung,

Fig. 18

ein Flussdiagramm eines ersten Umschaltvorgangs von Fig. 17, und

Fig. 19

ein Flussdiagramm eines zweiten Umschaltvorgangs von Fig. 17.

The invention is explained in more detail in the following description on the basis of exemplary embodiments shown in the drawings. In the drawings, the same structural elements with identical functionalities each have the same reference numbers and are generally only described once. Show it:

Fig. 1

a perspective view of a hand machine tool with a communication interface and with an operating element for initiating a switching process for switching a drive unit between a first and second direction of rotation,

Fig. 2

a partially sectioned side view of the hand tool of FIG Fig. 1 with the drive unit,

Fig. 3

a longitudinal section of the drive unit of the handheld power tool from Fig. 1 and Fig. 2 ,

Fig. 4

a perspective side view of the control element of Fig. 1 with a rocker switch according to one embodiment,

Fig. 5

a perspective side view of the rocker switch of Fig. 4 in a stable rest position and in an unstable switching position,

Fig. 6

a partially exploded view of the rocker switch of FIG Fig. 4 and Fig. 5 ,

Fig. 7

a perspective side view of the control element of Fig. 1 with two rocker switches according to one embodiment,

Fig. 8

a perspective side view of the control element of Fig. 1 with a slide according to one embodiment,

Fig. 9

a cross section of a two-sided, monostable slide according to an embodiment,

Fig. 10

a longitudinal section of the two-sided, monostable slide of Fig. 9 ,

Fig. 11

a perspective partial view of the control element of FIG Fig. 1 according to one embodiment,

Fig. 12

a perspective partial view of the control element of FIG Fig. 1 with a push button according to an embodiment,

Fig. 13

a perspective partial view of the control element of FIG Fig. 1 according to one embodiment,

Fig.

14 is a perspective partial view of the operating element from FIG Fig. 13 ,

Fig. 15

FIG. 3 is a schematic diagram of the handheld power tool of FIG Fig. 1 with the exemplary control element and the communication interface,

Fig. 16

a perspective view of a system consisting of the hand tool of FIG Fig. 1 and a control unit according to a first embodiment,

Fig. 17

a flowchart of an interactive program for initiating a switching process for switching a drive unit between a first and second direction of rotation,

Fig. 18

a flowchart of a first switching process of FIG Fig. 17 , and

Fig. 19

a flowchart of a second switching process of FIG Fig. 17 .

Description of the exemplary embodiments

Fig. 1 shows an exemplary handheld power tool 100 with a housing 110 in which an output spindle (310 in Fig. 3 ) or at least one drive unit (220 in Fig. 2 ) is arranged, the at least one drive motor (120 in Fig. 2 ) having. The housing 110 has a handle 103 with a hand switch 105. The drive motor (120 in Fig. 2 ) can be operated, for example, via the manual switch 105, ie can be switched on and off, and can preferably be controlled or regulated electronically in such a way that both a reversing operation and specifications with regard to a desired rotational speed can be implemented.

In addition, an operating element 106 for initiating a switching process for switching over the drive unit (220 in Fig. 2 ) arranged between a first and a second direction of rotation, via which a direction of rotation of the drive motor (120 in Fig. 2 ) or that of the drive motor (120 in Fig. 2 ) at least indirectly drivable output spindle (310 in Fig. 3 ) is adjustable. The operating element 106 is preferably made by at least one monostable switching element, for example by a rocker switch (406 in Fig. 4 ), a slider (706 in Fig. 8 ) or a pushbutton (1235 in Fig. 14 ), educated.

The handheld power tool 100 preferably has an optional switchable transmission (130 in Fig. 2 ), which can be switched between at least a first and second gear, and an optional hammer mechanism (not shown). By way of illustration, the hand-held power tool 100 is designed in the manner of an impact drill or screwdriver, the first gear step corresponding to a screwdriving mode and the second gear step corresponding to a drilling or hammer drilling mode. However, further gear steps can also be implemented so that, for example, the drilling mode is assigned to the second gear step and the hammer drilling mode is assigned to a third gear step, etc. Initiation of a switching process to switch the drive unit (220 in Fig. 2 ) between the first and second direction of rotation. In this case, the handheld power tool 100 can preferably be connected to a battery pack 102 for mains-independent power supply, but can alternatively also be operated in a mains-dependent manner.

According to one embodiment, at least one user guidance unit 115 is provided, which at least for switching over the drive motor (120 in Fig. 2 ) or the output spindle (310 in Fig. 3 ) is formed between the first and second direction of rotation. The user guidance unit 115 is preferably also designed to set the first or second gear stage required in the respective current operation. The user guidance unit 115 can be designed for active and / or passive user guidance during a corresponding switchover between the first and second direction of rotation. In the case of active user guidance, a user of the handheld power tool 100 is preferably guided by visual, auditory and / or haptic instructions or prompts to switch during a corresponding switchover process, while with passive user guidance a corresponding switchover process is carried out automatically and is preferably only displayed to the user. Exemplary realizations of active and passive user guidance are described in detail below.

The user guidance unit 115 preferably has at least one manually operable operating unit 106, 116, 117 with at least one, and illustratively a first, second and third manually operable operating element 106, 116, 117, the operating elements 106, 116, 117 for initiating a switching process to switch the drive unit (220 in Fig. 2 ) are formed between the first and second direction of rotation and / or to initiate a switching process for switching the transmission 130 between different gear stages. According to one embodiment, at least one of the operating elements 116, 117 has a touch-sensitive screen (1120 in Fig. 13 ) on. The touch-sensitive screen is preferably designed to display (1185 in Fig. 13 ) a request to initiate a switching process for switching the drive unit (220 in Fig. 2 ) between the first and second direction of rotation and to initiate the switching process.

The user guidance unit 115 preferably has a mobile computer, e.g. a smartphone and / or a tablet computer, and / or the operating element 116, 117 can be designed as a display. Alternatively, other so-called "smart devices" such as. B. a watch, glasses, etc. can be used as a mobile computer.

According to one embodiment, the user guidance unit 115 is at least partially integrated into the handheld power tool 100 and / or at least partially as an external, separate component (1040 in Fig. 16 ) educated. The display can be integrated into the handheld power tool 100 and / or arranged externally. Switching instructions can preferably be shown on the display in order to at least make it easier for a user of the handheld power tool 100 to operate and / or set, for example, an application-specific operating mode of the handheld power tool 100.

Furthermore, the hand-held power tool 100 preferably has a communication interface 1050, which is preferably provided for communication with the user guidance unit 115, which can preferably be operated by a user, and is designed to send switching instructions for switching the drive motor (120 in Fig. 2 ) or the output spindle (310 in Fig. 3 ) between a first and second direction of rotation. The communication interface 1050 is preferably also designed to receive switching instructions for the application-specific switching of the transmission 130 between the two different gear stages from the user guidance unit 115. The communication interface 1050 is designed at least to send a control signal to at least one of the operating elements 106, 116, 117. A request to initiate a switching process for switching the drive unit between the first and second direction of rotation, for example by at least one of the operating elements 106, 116, 117, is preferably made possible. A request to initiate a switching process for switching the transmission 130 between the two different gear stages, for example by at least one of the operating elements 116, 117, is preferably also made possible.

It should be noted that in the in Fig. 1 The embodiment shown, the three operating elements 106, 116, 117 are shown as operating elements which can be used for reversing the direction of rotation. However, as an alternative to this, only the operating element 106, or one of the two operating elements 116, 117, or the two operating elements 116, 117 can be designed to reverse the direction of rotation of the drive unit (220 in Fig. 2 ) or the drive motor (120 in Fig. 2 ) to enable.

According to one embodiment, the communication interface 1050 is designed in the manner of a wireless transmission module, in particular as a radio module for wireless communication using the Bluetooth standard. However, the transmission module can also be designed for any other wireless and / or wired communication, e.g. via WLAN and / or LAN.

An optional work area lighting 104 is preferably arranged on the housing 110, illustratively in the area of the tool holder 190, for illuminating a work area of the handheld power tool 100. In addition, the tool holder 190 is preferably assigned an optional torque limiting element 170 for setting a maximum transmittable torque. The torque limiting element 170 can be in the manner of a mechanical one Slipping clutch or an electrical torque limiter can be designed.

Fig. 2 FIG. 10 shows the handheld power tool 100 of FIG Fig. 1 , which illustratively has a drive unit 220 for the rotary drive of an output spindle (310 in Fig. 3 ), the drive unit 220 being switchable between a first direction of rotation and a second direction of rotation. The drive unit 220 preferably has a drive motor 120 and an optional switchable gear 130.

The optional switchable transmission 130 preferably has a transmission housing 136, which is illustratively designed in two parts with a first and second transmission housing part 137, 138. In this case, the first gear housing part 137 is preferably arranged facing the drive motor 120 and the second gear housing part 138 is arranged facing the tool holder 190. However, the gear housing 136 can also be formed in one piece or have more than two gear housing parts. The optional switchable transmission 130 is preferably designed in the manner of a planetary gear, which can preferably be switched between at least two different gear stages, and in Fig. 3 will be further described.

According to one embodiment, the optional shiftable transmission 130 is assigned a gear shifting unit 210, which is designed to shift the optional shiftable transmission 130 between the at least two different gear stages. This gear shifting unit 210 preferably has at least one actuatable shift ring 140. In addition, the gear change unit 210 preferably has a transmission unit 134.

The transmission unit 134 is preferably designed to activate the actuatable switching ring 140 on a preferably axially displaceable switching element (350 in Fig. 3 ) of the transmission 130 to be transmitted. The gear shifting unit 210 or the shifting element (350 in Fig. 3 ) only when the optional switchable transmission 130 is in operation, the gear stage is changed, so that a gear change is only possible when the optional switchable transmission 130 is in operation.

According to one embodiment, at least one operating element (106 in Fig. 1 ) to initiate a switching process for switching the drive unit 220 provided between the first and second directions of rotation. The operating element 106 is preferably designed as a monostable switching element, for example as a rocker switch (406 in Fig. 4 ), Slider (706 in Fig. 8 ) and / or push button (1235 in Fig. 14 ).

The at least one operating element 106 is preferably assigned a direction of rotation detection unit 160, which is designed to detect a current direction of rotation of drive unit 220. The direction of rotation detection unit 160 preferably displays a request to initiate a switching process to switch the drive unit (220 in Fig. 15 ) between the first and second direction of rotation.

According to one embodiment, the control element (106 in Fig. 1 ) a sensor unit (1370 in Fig. 15 ) assigned. The sensor unit 1370 preferably has a mechanical, electrical, magnetic and / or optical sensor and is preferably designed to generate a corresponding actuation signal when the operating element is actuated. The sensor unit 1370 is preferably designed to provide a communication interface (1050 in Fig. 1 ) to transmit the actuation signal upon actuation of the at least one operating element 106. The actuation signal is preferably used to determine the current direction of rotation of the output spindle (310 in Fig. 3 ) evaluable.

Control electronics 150 are preferably provided, which are designed to, upon actuation of the at least one operating element designed as a monostable switching element (106 in Fig. 1 ) to effect a switching process for switching the drive motor 120 between the first and second directions of rotation. The control electronics 150 are preferably designed to effect the switching process for switching the drive motor 120 between the first and second directions of rotation exclusively when the drive motor 120 is at a standstill. In addition, the control electronics 150 are preferably designed to brake the drive motor 120 to a standstill in order to enable the switching process for switching the drive motor 120 between the first and second directions of rotation.

According to one embodiment, the reversal of the direction of rotation between the first and second directions of rotation is brought about by an actuating unit 180 with a servomotor 182. A servomotor gearbox 184 is preferably assigned to servomotor 182. The servomotor 182 is preferably designed to, when activated by the operating element (106 in Fig. 1 ) to effect a switching process for switching the drive unit 220 between the first and second directions of rotation.

The communication interface 1050 is preferably designed to transmit a control signal for activating the actuating unit 180 to the actuating motor 182. Here, the control signal can be in response to an actuation of the at least one operating element 116, 117 from Fig. 1 be generated. As an alternative or in addition to this, the generation of the control signal can preferably be triggered by the user guidance unit 115, ie for example by a mobile computer in the form of a smartphone, a tablet computer or another so-called "smart device", such as, for B. a clock, glasses, etc., so that a provision of the controls 106, 116, 117 of Fig. 1 can also be dispensed with. In addition, according to one embodiment, the generation can also be triggered directly by the communication interface 1050, for example as a function of predetermined operating parameters, so that once again the provision of the operating elements 106, 116, 117 can be dispensed with.

It also clarifies Fig. 2 the manual switch 105 of the handheld power tool 100, which is designed to activate and deactivate the drive motor 120. An on / off switch 107 is preferably assigned to the hand switch 105, the hand switch 105 preferably being designed as a push button, but can also be designed as a push button, which is sometimes also referred to as a push button.

Fig. 3 FIG. 13 shows the optional switchable gear 130 of FIG. 1, which is preferably designed as a planetary gear Fig. 2 for driving an output spindle 310 of the handheld power tool 100 from Fig. 1 , and an optional hammer mechanism 320. A suitable structure and the mode of operation of a corresponding hammer mechanism are sufficiently known from the prior art, so that here for the sake of simplicity and the brevity of the description, a detailed description of the optional striking mechanism 320 can be dispensed with.

The planetary gear 130 preferably has at least a first and second, illustratively a first, second and third planetary stage 372, 374, 376, which illustratively enable the planetary gear 130 to be operated in a first and a second gear stage. Each gear stage is preferably assigned to a corresponding operating mode, e.g. a screwdriving mode, drilling mode and / or a hammer drilling mode / impact screwdriving mode. For example, a screwing mode can be provided for carrying out a screwing process with torque limitation in a first gear stage, while a drilling process and / or a drilling or screwing process with an impact function is provided for carrying out in a second gear stage.

Fig. 3 It also makes clear that a switching process for switching the drive unit 220 for driving the output spindle 310 from the first to the second direction of rotation can be made possible, for example, by switching the drive motor 120. It is pointed out, however, that the configuration of the switching process by switching over the drive motor 120 is only an example and is not to be seen as a limitation of the invention.

Fig. 4 shows an example of an operating element for initiating a switching process for switching the drive unit (220 in Fig. 2 ) between the first and second direction of rotation, which is designed as a rocker switch 406. The rocker switch 406 is preferably attached above the handle 103 in order to enable easily accessible operation.

The rocker switch 406 is preferably a monostable switch that is moved along a guide web 410. The rocker switch 406 is preferably in one-in Fig. 4 illustrative upper-resting position (510 in Fig. 5 ), whereby an actuation of the rocker switch 406 a rotation into a switching position (520 in Fig. 5 ), from which the rocker switch 406 preferably automatically returns to the rest position 510. For this purpose, the rocker switch 406 is preferably at least one spring element (610 in Fig. 6 ) assigned, which acts on the rocker switch 406 in the rest position 510.

Fig. 5 shows the rocker switch 406 of Fig. 4 in the rest position 510 and in the switching position 520. When the rocker switch 406 is actuated, it is preferably rotated along the guide web 410 from the rest position 510 into the switching position 520. The rocker switch 406 is preferably a sensor unit (1370 in Fig. 15 ), which is designed to generate a corresponding actuation signal when the rocker switch 406 is actuated. The actuation signal is preferably used to determine the current direction of rotation of the output spindle (310 in Fig. 3 ) evaluable. For this purpose, the sensor unit 1370 preferably has a mechanical, electrical, magnetic and / or optical sensor. For example, the rocker switch 406 can be operated via a lever (408 in Fig. 6 ) generate a corresponding actuation signal in the sensor unit 1370.

Fig. 6 shows the rocker switch 406 of Fig. 4 and Fig. 5 , which is preferably assigned a spring element 610, which is preferably arranged between the rocker switch 406 and a stop 413. The spring element 610 is preferably in the rest position (510 in Fig. 5 ) relaxed and in the shift position (520 in Fig. 5 ) so that the rocker switch 406 can automatically return to the rest position 510 from the switch position 520 with the aid of the spring element 610.

Preferably, the lever 408 is in the switching position (520 in Fig. 5 ), caused by the rotation of the rocker switch 406 along the guide web 410 - in Fig. 6 downwards - also shifted downwards. The lever 408 can preferably be directed to a mechanical, electrical, magnetic and / or optical sensor of the sensor unit (1370 in Fig. 15 ) act or interact with this. For example, a push button (1235 in Fig. 14 ) under lever 408, which is mechanically operated by lever 408 and sends an electrical signal to control electronics (150 in Fig. 2 ) sends. The electronic control system 150 then preferably effects a switching process for switching the drive unit (220 in Fig. 2 ) between the first and second direction of rotation.

Fig. 7 shows an exemplary operating element for initiating a switching process for switching over the drive unit (220 in Fig. 2 ) between the first and second direction of rotation, which is illustratively designed in the form of two rocker switches 1006, 1007, one of the two rocker switches 1006, 1007 preferably on one side of the handle (103 in Fig. 1 ) is provided. The two rocker switches 1006, 1007 are each preferably designed as a monostable switching element and illustratively have a rest position (510 in Fig. 5 ) and a switch position (520 in Fig. 5 ) on.

The two rocker switches 1006, 1007 are preferably mechanically decoupled, but they can optionally also be connected to one another via an axis. At least one of the two rocker switches 1006, 1007 is preferably a sensor unit (1370 in Fig. 15 ), which is designed to generate a corresponding actuation signal when the rocker switch 1006, 1007 is actuated. The actuation signal is preferably used to set a desired direction of rotation of the output spindle (310 in Fig. 3 ) usable. For this purpose, the sensor unit 1370 preferably has a mechanical, electrical, magnetic and / or optical sensor. By way of illustration, the rocker switch 1006 can generate a corresponding actuation signal in the sensor unit 1370 when actuated via a lever 1008.

By way of illustration, the sensor unit 1370 has a lever 407 which, upon actuation of the rocker switch 1006 and thus the rotation of the lever 1008 - in Fig. 7 down -, is rotated counterclockwise about an axis 1009 and thereby actuates an electrical switch 409 of the sensor unit 1370, which sends an electrical signal to the control electronics (150 in Fig. 2 ) sends. The electronic control system 150 then preferably effects a switching process for switching the drive unit (220 in Fig. 2 ) between the first and second direction of rotation, for example by commutating the drive motor 120 from Fig. 2 .

The rocker switch 1007 is preferably also provided with a corresponding sensor unit 1370, the electrical switch 409 of which can also send an electrical signal to the control electronics 150 when actuated, whereby the control electronics 150 preferably cause a switching process to switch the drive unit 220 between the first and second directions of rotation . As an alternative to this, each of the rocker switches 1006, 1007 can be assigned a separate electrical switch 409, which is each actuated by a separate lever 407, the two switches 409 preferably being connected electrically in parallel so that actuation of one of the two rocker switches 1006, 1007 enables the drive unit 220 to be switched between the first and second directions of rotation.

Fig. 8 shows an exemplary operating element designed as a monostable switching element, which illustratively has the shape of a slide 706. The slide 706 preferably has at least a first, illustratively a first and second, spring element 710, 720 which, by way of example, enable the slide 706 to be returned from a switching position to a rest position after it has been actuated.

Furthermore, the slide 706 preferably has a receptacle 740. This receptacle 740 is preferably arranged around a driver element 760, which is preferably firmly connected to the direction of rotation detection unit 160. By moving the slide 706 from the rest position to the switching position, the receptacle 740 effects a rotary movement of the direction of rotation detection unit 160 about an axis 762, preferably via the entrainment element 760, which preferably initiates a switching process for switching the drive unit (220 in Fig. 2 ) takes place between the first and second direction of rotation.

Fig. 9 shows a further exemplary control element for initiating a switching process for switching over the drive unit (220 in Fig. 2 ) between the first and second directions of rotation, illustratively in the form of a two-sided slide 806, which is preferably from both sides of the handle 103 of Fig. 1 can be operated. The two-sided slide 806 is preferably designed as a monostable switching element and illustratively has a rest position (920 in Fig. 10 ) and two switch positions (910, 930 in Fig. 10 ) on.

Furthermore, the two-sided slide 806 preferably has a receptacle 840. This receptacle 840 is preferably arranged around a driver element 760, which is preferably permanently connected to the direction of rotation detection unit 160. By moving the two-sided slide 806 from the rest position (920 in Fig. 10 ) in one of the two switching positions (910, 930 in Fig. 10 ) the receptacle 840 effects a rotary movement of the rotational direction detection unit 160 in one direction or the other, preferably via the entrainment element 760 around the axis 762, which preferably initiates a switching process for switching the drive unit (220 in Fig. 2 ) takes place between the first and second direction of rotation.

The two-sided slide 806 preferably has a spring element 820, which illustratively allows the two-sided slide 806 to be returned from one of the two switching positions (910, 930 in FIG Fig. 10 ) to a resting position (920 in Fig. 10 ) allows.

Fig. 10 FIG. 10 shows the two-sided slider 806 of FIG Fig. 9 in a rest position 920 and in two switching positions 910, 930. The two-sided slide 806 preferably has the spring element 820 from Fig. 9 on. The rest position 920 is characterized in that the spring element 820 is stretched at least between a first projection 901 and a second projection 902 of the two-sided slide 806 or between a first projection 903 and a second projection 904 of the housing part 905. Illustratively, the spring element 820 is stretched between the first projection 901 and the second projection 902 of the two-sided slide 806 and between the first projection 903 and the second projection 904 of the housing part 905. The spring element 820 is preferably relaxed in the rest position. Alternatively, the spring element 920 can also be arranged in the rest position 920 in a tensioned form.

When the two-sided slide 806 - in Fig. 10 from the right side - the two-sided slide 806 is illustratively shifted to the left into the first of the two switching positions 910. In this first of the two switching positions 910, the spring element 820 is preferably tensioned between the second projection 902 of the two-sided slide 806 and the first projection 903 of the housing part 905. After the bilateral slide 806 has been actuated, the spring element 820 thus enables the bilateral slide 806 to be automatically returned from the switching position 910 to the rest position 920.

When the two-sided slide 806 - in Fig. 10 from the left - the two-sided slide 806 is illustratively shifted to the right into the second of the two switching positions 930. In this second of the two switching positions 930, the spring element 820 is preferably between the first projection 901 of the two-sided slide 806 and the second projection 904 of the housing part 905 cocked. After the bilateral slide 806 has been actuated, the spring element 820 thus enables the bilateral slide 806 to be automatically returned from the switching position 930 to the rest position 920.

Fig. 11 FIG. 4 shows a further exemplary operating element in the form of a slide 1106, designed as a monostable switching element. The slide 1106 is illustratively linear along an associated device longitudinal axis of the handheld power tool 100 from FIG Fig. 1 movable. Illustratively, the slide 1106 is in a stable rest position 1107. When the slide 1106 is actuated, it is preferably shifted from the rest position 1107 into an assigned switching position 1108. A sensor unit (1370 in Fig. 15 ), which is designed to generate a corresponding actuation signal when the slide 1106 is actuated. The actuation signal is preferably used to determine the current direction of rotation of the output spindle (310 in Fig. 3 ) evaluable. For this purpose, the sensor unit 1370 preferably has a mechanical, electrical, magnetic and / or optical sensor. Illustratively, when actuated via a pressure piece 1111, the slide 1106 can generate a corresponding actuation signal in the sensor unit 1370.

The stable rest position 1107 of the slide 1106 is preferably the front position and the unstable switching position is the rear position. Alternatively, the rear position can also be the stable rest position and the front position the unstable switching position. According to one embodiment, the slide 1106 has a rest position and two switch positions, the first of the two switch positions being provided in front of the rest position and the second of the two switch positions being provided behind the rest position. The slide 1106 preferably has at least one spring element 1110, which illustratively enables the slide 1106 to be returned from a switching position 1108 to a rest position 1107 after it has been actuated.

Fig. 12 FIG. 10 shows the handheld power tool 100 of FIG Fig. 1 with the user guidance unit 115 of Fig. 1 , which here preferably has an operating unit 1020 for manually setting a gear step or an operating mode and / or a direction of rotation. The operating unit 1020 is preferred with at least one, illustratively three operating elements 1021, 1022, 1023 for setting one Gear step or an operating mode and with illustrative two operating elements 1085, 1086 for initiating a switching process for switching over the drive unit (220 in Fig. 2 ) between the first and second direction of rotation. By way of illustration, the operating element 1021 is provided for setting the screwing mode, the operating element 1022 for setting the drilling mode and the operating element 1023 for setting the impact mode, the operating elements 1021-1023 having, for example, symbols or pictograms corresponding to the operating modes.

By way of illustration, the operating element 1085 is provided for setting a clockwise rotation of the drive unit 220 and the operating element 1086 is provided for setting a counterclockwise rotation of the drive unit 220. The operating elements 1085, 1086 are preferably each designed as monostable switching elements and have, for example, symbols or pictograms corresponding to the direction of rotation. The operating elements 1021-1023 and 1085, 1086 are preferably arranged on a circuit board 1030. The operating unit 1020 is preferably at least partially integrated into the handheld power tool 100.

Fig. 13 shows an operating unit 1120 with at least one, illustratively three operating elements 1021, 1022, 1023 for setting a gear stage or an operating mode and with illustratively one operating element 1180 for initiating a switching process for switching over the drive unit (220 in Fig. 2 ) between the first and second direction of rotation. According to one embodiment, the operating unit 1120 has a touch-sensitive screen.

By way of illustration, the operating element 1021 is provided for setting the screwing mode, the operating element 1022 for setting the drilling mode and the operating element 1023 for setting the impact mode, the operating elements 1021-1023 having, for example, symbols or pictograms corresponding to the operating modes. The operating element 1180 for switching over the drive unit (220 in Fig. 2 ) provided between a first and second direction of rotation and preferably designed as a monostable switching element. The displays 1185, 1186 have, for example, symbols or pictograms corresponding to the direction of rotation. The operating elements 1021-1023 and 1180 are preferred arranged on a circuit board 1030. The operating unit 1020 is preferably at least partially in the handheld power tool 100 from Fig. 1 integrated.

Fig. 14 FIG. 11 shows a section of the operating unit 1120 from FIG Fig. 13 with the control element 1180 and the circuit board 1030. At least two displays 1185, 1186 are preferably provided on the control unit 1120 to display a respectively set direction of rotation. Preferably, display 1185 shows counterclockwise rotation of the output spindle (310 in Fig. 3 ) on and the display 1186 a clockwise rotation of the output spindle 310.

The circuit board 1030 preferably has at least one switching element 1235, which is assigned to the operating element 1180, and at least two lighting means 1231, 1233, which are assigned to the displays 1185, 1186. The lighting means 1231, 1233 are preferably designed at least to display a request to initiate a switching process for switching the drive unit 220 between the first and second directions of rotation when predetermined operating conditions occur.

The switching element 1235 is preferably designed as a monostable switch, illustratively as a pushbutton, and / or the lighting means 1231, 1233 are designed in the manner of LEDs. Alternatively or additionally, the operating unit 1120 can also be designed in the manner of a display, preferably with a touch-sensitive screen, which is sometimes also referred to as a touchscreen, and / or a mobile computer, with a symbol to be activated on the display lighting up and / or can blink. Alternatively, gesture recognition can also be implemented. The operating unit 1120 is preferably connected to the servomotor 182 and the servomotor gearbox 184 for setting a direction of rotation selected by a user 1230, which in turn can rotate the direction of rotation detection unit 160 preferably about an axis 762.

Fig. 15 shows a schematic tool system 1000 with the handheld power tool 100 described above and a mobile computer 1040. This clarifies Fig. 15 the handheld power tool 100 with its drive unit 220, which has the drive motor 120, the transmission 130, the optional hammer mechanism 320 and the torque limiting element 170. The Control electronics 150 have at least one actuator 1351, 1352, 1353 Fig. 15 three actuators 1351, 1352, 1353 are shown, the actuator 1351 being designed as an example for changing gear of the transmission 130 and / or for switching the transmission 130 between the first and second direction of rotation, the actuator 1352 for activating / deactivating the optional hammer mechanism 320 and the actuator 1353 for setting a torque by means of the torque limiting element 170. When an actuator 1351-1353 is activated, the control electronics 150 preferably forwards an activation signal to an associated lighting means 1231, 1233. Alternatively or additionally, the activation signal can also be designed as a signal tone.

According to one embodiment, the mobile computer 1040 has an interactive program 1342, 1344, in particular a smartphone app, for communication with the communication interface 1050 of the handheld power tool 100. A first program 1342 is preferably designed for setting applications, e.g. to screw a screw into soft wood. In this case, the program 1342 preferably determines operating parameters for a particular application, e.g. a speed, a direction of rotation, a torque, a gear step and / or an impact operation requirement, and forwards these to the communication interface 1050 of the handheld power tool 100.

As an alternative to this, the interactive program 1342, 1344 can also only be assigned to the communication interface 1050 of the handheld power tool 100. In this case, the interactive program 1342, 1344 is preferably executed by the communication interface 1050 of the handheld power tool 100, so that the use of the mobile computer 1040 can be dispensed with.

The communication interface 1050 is preferably designed to transmit a control signal to the actuators 1351, 1352, 1353 of the handheld power tool 100, at least one actuator 1351 being designed to switch the transmission 130 between the different gear stages when activated by the communication interface 1050. The communication interface 1050 preferably transmits the control signal to the control electronics 150, which activate and / or control the respective actuators 1351-1353.

Alternatively or additionally, a second program 1344 is provided, which is designed to set at least one specific operating parameter, e.g. a speed, a direction of rotation, a torque, a gear step and / or an impact operation requirement. Here, a user of the handheld power tool 100 inputs the desired operating parameters directly via the program 1344. These are then transmitted to the communication interface 1050 of the handheld power tool 100, the communication interface 1050 forwarding a corresponding control signal as described above.

As an alternative or in addition to this, the handheld power tool 100 can be used to initiate a switching process for switching the drive unit (220 from Fig. 2 ) or the drive motor 120 or the gear 130 between the first and second direction of rotation, for manual setting of a gear step and / or an operating mode or for manual setting of operating parameters have at least one operating element 106, 1311, 1312, 1313. Illustrative are in Fig. 15 four control elements 106, 1311, 1312, 1313 are shown. The first operating element 106 is designed, for example, to initiate the switching process for switching the drive unit 220 between the first and second direction of rotation, the second operating element 1311 for changing gears, the third operating element 1312 for activating and / or deactivating the optional hammer mechanism 320 and the fourth operating element 1313 for torque adjustment.

The respective operating element 106, 1311, 1312, 1313 is preferably designed to send an application-specific or input-dependent control signal to the control electronics 150, so that the control electronics 150 activate and / or control the respective actuators 1351-1353 and / or the drive motor 120 directly can. The operating element 106 is preferred as a monostable switch, for example as a rocker switch (406 in Fig. 4 ), Slider (706 in Fig. 8 ) or pushbutton (1235 in Fig. 14 ), educated. The operating elements 1311-1313 are preferably designed as electrical operating elements, but can also be designed as any other operating element, for example as a mechanically displaceable lever arm.

In addition, the user guidance unit 115 can be assigned a display and / or a mobile computer 1040 that provides switching instructions for switching the drive motor (120 in Fig. 2 ) or the output spindle (310 in Fig. 3 ) between the first and second direction of rotation and / or switching instructions for application-specific switching of the drive motor 120 or the transmission 130. The respective switching instructions can be visualized on the display and / or on the mobile computer 1040 as step-by-step instructions. In this case, the at least one operating element 116, 117 is preferably assigned a sensor unit 1370, which is designed to transmit an actuation signal to the communication interface 1050 and / or the mobile computer 1040 when the at least one operating element 116, 117 is actuated, so that a respective next step the respective switching instruction can be displayed.

Furthermore, the sensor unit 1370 can also be designed as an internal and / or external sensor for monitoring and / or optimizing the handheld power tool 100 and can preferably be designed as a temperature sensor, acceleration sensor, position sensor, etc. In this case, software can be provided which is designed to check the settings of the control electronics 150 or of the handheld power tool 100 and, if necessary, to adjust them, for example in the case of the drive motor 120 from which has become hot due to an excessively high torque Fig. 1 emit a warning signal and / or carry out an automatic gear change.

An adapter interface 1380 for connection to at least one adapter 1385 is preferably provided. The adapter interface 1380 can be designed in the manner of a mechanical interface, an electrical interface and / or a data interface, the adapter 1385 for transmitting information and / or control signals such as a torque, a speed, a voltage, a current and / or further data is formed on the handheld power tool 100. In the case of an adapter interface 1380 designed as a data interface, the adapter 1385 preferably has a transmission unit. The adapter 1385 can preferably be designed, for example, as a range finder and can transmit determined parameters to the handheld power tool 100 via the adapter interface 1380. The adapter can be used with and / or without drive unit 220. The adapter 1385 can preferably be activated via the mobile computer 1040, with the latter or the display being able to visualize activation of the adapter 1385.

Furthermore, the control electronics 150 preferably control the drive motor 120 and / or the work area lighting 104. The manual switch 105 preferably has a lock 1360, which is preferably designed as a mechanical and / or electrical lock. Furthermore, the on / off switch 107 and / or the control electronics 150 are supplied with power from the battery pack 102.

Fig. 16 FIG. 10 shows the handheld power tool 100 of FIG Fig. 1 with the drive unit 220 from Fig. 2 , which can be switched between the first and second direction of rotation, the handheld power tool 100, according to one embodiment, the rocker switch 406 of Fig. 4 as well as the communication interface 1050 of Fig. 1 having. In addition, the handheld power tool 100 with the user guidance unit 115 is shown in FIG Fig. 1 provided, which here is preferably the operating unit 1120 of Fig. 13 for manually setting a direction of rotation reversal.

The operating unit 1120 is preferably provided with at least one operating element 1180 for initiating a switching process for switching over the drive unit (220 in Fig. 2 ) between the first and second direction of rotation. The operating element 1180 for switching over the drive unit (220 in Fig. 2 ) provided between the first and second direction of rotation and preferably designed as a monostable switching element. The operating unit 1020 is preferably at least partially integrated into the handheld power tool 100.

Here or as an alternative to this, the user guidance unit 115 can, as described above, be at least partially designed as an external, separate component 1040. In this case, the external component 1040 preferably has a mobile computer, in particular in the manner of a smartphone and / or tablet computer. Alternatively, other so-called "smart devices" such as. B. a watch, glasses, etc. can be used as a mobile computer. As described above, provision of the operating unit 1120 can also be dispensed with, in particular if this can be implemented by the mobile computer 1040. To display a set operating mode, handheld power tool 100 preferably has a display. Preferably In this case, the user guidance unit 115 forms a tool system 1000 with the handheld power tool 100.

The mobile computer 1040 preferably has a display 1010, which is preferably designed in the manner of a touchscreen. The display 1010 preferably points at least to reverse the direction of rotation of the output spindle (310 in Fig. 3 ) the handheld power tool 100 has at least one operating element 1015 and at least two display elements 1014 and 1016 for displaying the currently set direction of rotation. Alternatively or additionally, the at least two displays 1014, 1016 on the display 1010 are designed as operating elements for determining the direction of rotation of the output spindle 310. Furthermore, the display 1010 preferably has at least one, illustratively three, operating elements 1011, 1012, 1013 for entering at least one operating mode of the handheld power tool 100. Illustrative are in Fig. 16 the control elements 1011-1016 on the display 1010 are designed as control panels, but could also be designed as switches and / or buttons.

According to one embodiment, the handheld power tool 100 is designed in such a way that the output spindle 310 of Fig. 3 assumes a preprogrammed, first direction of rotation under certain conditions, for example after an interrupted power supply due to the replacement of a battery pack 102. The operating elements 106, 1015, 1180 are preferably designed to enable reprogramming of the handheld power tool 100, as a result of which at least one reversal of the preprogrammed, first direction of rotation takes place. The reprogramming is preferably carried out by actuating the operating elements 106, 1015, 1180 in a predetermined sequence. An actuation of the operating elements 106, 1015, 1180 in a different, predetermined sequence preferably enables the handheld power tool 100 to be blocked.

In the event that the user guidance unit 115 has both the operating unit 1120 and the mobile computer 1040, the control signal described above is preferably designed to display a display on the display 1010 to request the initiation of a switching process for switching the transmission 130 between the different Generate gear steps and / or a display requesting the initiation of a switching process to switch the drive unit (220 in Fig. 2 ) between the first and to generate a second direction of rotation and / or to enable the switching process to be initiated.

In this case, switchover instructions are preferably displayed via the display 1010, for example an instruction as to which direction of rotation is to be set for a given operation, which a user of the hand-held power tool 100 can then subsequently set using the operating unit 1120, for example. The displays 1185, 1186 on the handheld power tool 100 can be equipped with lighting means (1231, 1233 in Fig. 14 ) and the control signal is designed in this case to activate a corresponding lighting means 1231, 1233 in each case.

In addition, the mobile computer 1040 can also be at least partially integrated into the handheld power tool 100 and the operating mode is preferably set automatically in each case, preferably via the setting unit 180. It should be noted that the in Fig. 16 The exemplary implementations of the user guidance unit 115 described can be combined with one another as desired and, for example, the communication interface 1050 can also take over the functionality of the user guidance unit 115.

Fig. 17 FIG. 2 shows a flowchart for initiating a switching process for switching over a drive unit (220 in FIG Fig. 2 ) a hand machine tool (100 in Fig. 1 ) between a first and second direction of rotation, wherein a user guide unit (115 in Fig. 1 , 1040 in Fig. 16 ) is provided, which is designed to provide switching instructions for application-specific switching of the drive unit 220 between the first and second direction of rotation to a communication interface (1050 in Fig. 1 ) to send. The user guidance unit 115, 1040 is preferably at least partially integrated into the handheld power tool 115, 100 and / or at least partially designed as an external, separate component 1040. The user guidance unit 115, 1040 preferably has a mobile computer 1040, in particular a mobile computer designed in the manner of a smartphone or tablet computer. Alternatively, other so-called "smart devices" such as. B. a watch, glasses, etc. can be used as a mobile computer.

The user guidance unit 115, 1040 preferably has an interactive program 1342, 1344, in particular a smartphone app, for communication with the communication interface 1050. Alternatively or in addition, interaction with the interactive program can preferably be made possible via a user guidance unit 115 embodied as an operating element 1120.

Furthermore, the user guidance unit 115, 1040 preferably has at least one operating element 106 for initiating a switching process for switching the drive unit 220 between the first and second direction of rotation, the communication interface 1050 being designed to send a control signal to the at least one operating element 106 in order to to enable generation of a request to initiate a switching process for switching the drive unit 220 between the first and second directions of rotation by the at least one operating element 106.

The at least one operating element 106 preferably has a display 1010 and the control signal is preferably designed to generate a display on the display 1010 for visualizing the request to initiate a switching process for switching the drive unit 220 between the first and second directions of rotation. The display 1010 is preferably designed in the manner of a touchscreen.

According to one embodiment, in step 1701 an interactive program 1342, 1344 with the establishment of the power supply - for example after the electrical connection of a battery pack (102 in FIG Fig. 1 ), which is in a charged state - active with the handheld power tool 100. Alternatively or additionally, an interactive program 1342, 1344 can be activated by touching the display 1010. After the interactive program 1342, 1344 has been activated, the drive unit 220 preferably assumes a preprogrammed, first direction of rotation, preferably a clockwise rotation of the drive unit 220.

In step 1702, the interactive program 1342, 1344 identifies a desired switching process for switching the drive unit 220. If the interactive program 1342, 1344 has identified a first switching process in step 1702, which corresponds to answer A to test 1703, the interactive program 1342, 1344 runs continue with the first switching operation in step 1704. If the interactive program 1342, 1344 has identified a second switchover process in step 1702, which corresponds to answer B to test 1703, the interactive program 1342, 1344 continues with the second switchover process in step 1708.

Fig. 18 FIG. 13 is a flow diagram of the first switching process 1704 of FIG Fig. 17 . In step 1801, the interactive program 1342, 1344 preferably monitors the at least one operating element 106, preferably via the sensor unit 1370 of FIG Fig. 15 , which preferably has a mechanical, electrical, magnetic and / or optical sensor. In step 1803, the interactive program 1342, 1344 detects a movement of the operating element 106 from a stable rest position (510 in Fig. 5 ) to an unstable switching position (520 in Fig. 5 ), caused for example by the actuation of the operating element 106 by a user (1230 in Fig. 14 ).

In step 1805, the interactive program 1342, 1344, after the operating element 106 has been actuated by the user 1230, detects a movement of the operating element 106 from the unstable switching position 520 back to the stable rest position 510, preferably caused by at least one spring element (610 in Fig. 6 ). In step 1807, the interactive program 1342, 1344 monitors the status of the drive motor 120 and proceeds to step 1820 if the drive motor 120 is inoperative, which corresponds to answer A to test 1810. If the drive motor 120 is operating, which corresponds to answer B to test 1810, the interactive program 1342, 1344 continues with step 1830.

In test 1830, the interactive program 1342, 1344 tests whether a switching process for switching the drive unit 220 between the first and second directions of rotation is permitted when the drive motor 120 is in operation. If the switching process is not permitted (answer D), no switching process is carried out in step 1850 and the interactive program 1342, 1344 continues with step 1801. If the switchover process is permitted, which corresponds to answer C to test 1830, the interactive program 1342, 1344 continues with step 1840, during which the drive motor 120 is braked to a standstill.

If the drive motor 120 is out of operation or at a standstill, the interactive program 1342, 1344 in step 1820 effects a switching process for switching the drive unit 220 between the first and second directions of rotation. If the drive unit 220 was driven, for example, clockwise before step 1820, then the drive unit 220 is driven counterclockwise after step 1820. If the drive unit 220 was driven, for example, counterclockwise before step 1820, then the drive unit 220 is driven clockwise after step 1820. Furthermore, the interactive program 1342, 1344 preferably controls a display in step 1820 - for example display 1014, 1016 on the display 1010 in FIG Fig. 16 and / or display 1185, 1185 on control unit 1120 in Fig. 14 - To display the current direction of rotation of the output spindle 310 of Fig. 3 .

After the switching process has been completed, the interactive program 1342, 1344 continues with step 1822, during which the interactive program 1342, 1344 preferably enables the drive motor 120 to be started up again and returns to step 1801.

Fig. 19 FIG. 13 is a flow diagram of the second switching process 1708 of FIG Fig. 17 . In step 1901, the interactive program 1342, 1344 sets a preferred direction of rotation of the drive unit (220 in Fig. 2 ) on. The preferred direction of rotation is preset as a clockwise rotation, for example. Alternatively or additionally, the preferred direction of rotation can be specified by the user (1230 in Fig. 14 ) can be programmed.

In step 1902, the interactive program 1342, 1344 preferably monitors the at least one operating element 106, preferably via a sensor unit (1370 in Fig. 15 ), which preferably has a mechanical, electrical, magnetic and / or optical sensor. If the interactive program 1342, 1344, preferably via the sensor unit 1370, detects a movement of the operating element 106 from a stable rest position (510 in Fig. 5 ) to an unstable switching position (520 in Fig. 5 ), which corresponds to answer A to test 1910 and can be done, for example, by a user 1230 actuating the operating element 106, the interactive program 1342, 1344 continues with step 1930. If the interactive program 1342, 1344 does not move the operating element 106 from a stable rest position (510 in Fig. 5 ) into an unstable Switch position (520 in Fig. 5 ) detects what corresponds to answer B to test 1910, then the interactive program 1342, 1344 continues with test 1920.

If the interactive program 1342, 1344 detects, preferably via the sensor unit 1370, a movement of the operating element 106 from the unstable switching position 520 back to the stable rest position 510, which corresponds to response C to test 1920 and preferably by at least one spring element (610 in Fig. 6 ) is enabled, the interactive program 1342, 1344 continues with step 1930. If the interactive program 1342, 1344 does not detect any movement of the operating element 106 from an unstable switching position 520 to a stable rest position 510, which corresponds to response D to test 1920, then the interactive program 1342, 1344 returns to step 1902.

In step 1930, the interactive program 1342, 1344 monitors the status of the drive motor 120 and proceeds to test 1960 if the drive motor 120 is out of order, which corresponds to answer E to test 1940. If the drive motor 120 is operating, which corresponds to answer F to test 1940, the interactive program 1342, 1344 continues with step 1950.

In step 1950, the interactive program 1342, 1344 preferably causes the drive motor 120 to be braked to a standstill. If the drive motor 120 is out of operation or at a standstill, the interactive program in step 1970 effects a switching process for switching the drive unit 220 between the first and second directions of rotation. If the drive unit 220 was driven clockwise before step 1970, for example, then the drive unit 220 is driven counterclockwise after step 1970. If the drive unit 220 was driven, for example, in the counterclockwise direction before step 1970, the drive unit 220 is driven in the clockwise direction after step 1970. Furthermore, in step 1970, the interactive program preferably controls a display - for example display 1014, 1016 on display 1010 in FIG Fig. 16 and / or displays 1185, 1185 on control unit 1120 in Fig. 14 - To display the current direction of rotation of the output spindle 310 of Fig. 3 .

The interactive program proceeds to step 1990 upon completion of the switchover, during which the interactive program prefers 1342, 1344 enables the drive motor 120 to be started up again and returns to step 1902.

Claims (14)

1. Hand-held power tool (100) having a drive unit (220) for rotationally driving an output spindle (310), wherein the drive unit (220) has a drive motor (120) and can be changed over between a first direction of rotation and a second direction of rotation in order to make it possible to drive the output spindle (310) in the first or second direction of rotation, wherein at least one operating element (106) is provided to initiate a changeover operation for changing over the drive unit (220) between the first direction of rotation and the second direction of rotation, which operating element is in the form of a monostable switching element, characterized in that the drive motor (120) can be actuated via a manual switch (105), and control electronics (150) are provided and are designed to cause a changeover operation for changing over the drive motor (120) between the first direction of rotation and the second direction of rotation, when the at least one operating element (106) in the form of a monostable switching element is actuated, in such a manner that, if the drive unit (220) is driven in the clockwise direction before actuation of the operating element (106), the drive unit (220) is driven in the anticlockwise direction after actuation of the operating element (106) and vice versa.
2. Hand-held power tool according to Claim 1, characterized in that the at least one operating element (106) in the form of a monostable switching element is assigned a sensor unit (1370) which is designed to generate a corresponding actuation signal when the operating element (106) is actuated.
3. Hand-held power tool according to Claim 2, characterized in that the actuation signal can be used to set a respectively desired direction of rotation of the output spindle (310).
4. Hand-held power tool according to Claim 3, characterized in that the sensor unit (1370) has a mechanical, electrical, magnetic and/or optical sensor.
5. Hand-held power tool according to one of the preceding claims, characterized in that a direction of rotation detection unit (160) is provided and is designed to detect a respectively current direction of rotation of the drive unit (220).
6. Hand-held power tool according to one of the preceding claims, characterized in that a direction of rotation detection unit (160) is provided and is designed to indicate a request to initiate a changeover operation for changing over the drive unit (220) between the first direction of rotation and the second direction of rotation when predefined operating conditions occur.
7. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (106) in the form of a monostable switching element has a switching rocker (406), a pushbutton (1235) or a slide (706).
8. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (106) in the form of a monostable switching element is assigned at least one spring element (610) which moves the operating element (106) into a stable position.
9. Hand-held power tool according to one of the preceding claims, characterized in that the at least one operating element (106) in the form of a monostable switching element is provided with an illumination means and the illumination means is designed to indicate a request to initiate a changeover operation for changing over the drive unit (220) between the first direction of rotation and the second direction of rotation when predefined operating conditions occur.
10. Hand-held power tool according to one of the preceding claims, characterized in that the control electronics (150) are designed to cause the changeover operation for changing over the drive motor (120) between the first direction of rotation and the second direction of rotation only when the drive motor (120) is at a standstill.
11. Hand-held power tool according to Claim 10, characterized in that the control electronics (150) are designed to brake the drive motor (120) to a standstill in order to enable the changeover operation for changing over the drive motor (120) between the first direction of rotation and the second direction of rotation.
12. Hand-held power tool according to one of Claims 1 to 6, characterized in that the at least one operating element (106) in the form of a monostable switching element has a touch-sensitive screen.
13. Hand-held power tool according to Claim 12, characterized in that the touch-sensitive screen is designed to make it possible to indicate (1185) a request to initiate a changeover operation for changing over the drive unit (220) between the first direction of rotation and the second direction of rotation and to initiate the changeover operation.
14. Hand-held power tool according to one of the preceding claims which is in the form of a cordless screwdriver or a cordless drill/screwdriver.

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