CN115529926A - Hand-held power tool, additional handle, hand-held power tool system, system and method - Google Patents

Abstract

The invention relates to a hand-held power tool for use with a replacement tool, having a replacement tool interface, a drive unit for driving the replacement tool, an operating unit to which a replacement tool, in particular a grass or bush cutter, can be fastened, the operating unit having a first release unit and an actuating unit, wherein in at least one operating state of the hand-held power tool, the first release unit needs to be actuated in order to activate the drive unit by means of the actuating unit, it is proposed that the hand-held power tool has an identification device for identifying the replacement tool arranged on the replacement tool interface and/or an additional handle arranged on the hand-held power tool, and that, depending on the identified replacement tool and/or additional handle, in a second operating state, at least one second release unit needs to be actuated in order to activate the drive unit by means of the actuating unit. The invention also relates to an additional handle, a hand-held power tool system, a system and a method for controlling a hand-held power tool.

Description

Hand-held power tool, additional handle, hand-held power tool system, system and method

Background

Hand-held power tools according to the preamble of claim 1 are already known.

Disclosure of Invention

The invention relates to a hand-held power tool. A particularly advantageous embodiment results from the fact that the first and second housing parts are arranged in a single piece.

The starting point of the invention is a hand-held power tool for use with a changing tool, in particular a grass or shrub trimmer, having: an interchangeable tool interface, to which an interchangeable tool, in particular a grass or shrub pruning tool, can be fastened; a driving unit for driving the exchangeable tool; an operating unit having a first release unit, in particular a first release switch, and an actuating unit, in particular a main switch, wherein in at least one operating state of the hand-held power tool the first release unit is actuated in order to activate the drive unit by means of the actuating unit.

It is proposed that the hand-held power tool has an identification device for identifying a replacement tool arranged on the replacement-tool interface and/or an additional handle arranged on the hand-held power tool, in particular an additional handle arranged together with the replacement tool and the replacement-tool interface, and that, depending on the identified replacement tool and/or additional handle, in a second operating state, at least one second release unit, in particular a second release switch, preferably a second release unit arranged on the additional handle, needs to be actuated in order to activate the drive unit by means of the actuating unit. In particular, the switching signal can be transmitted from the second release unit to the hand-held power tool or can be sensed by the hand-held power tool, for example via an electrical circuit which is closed by arranging the replacement tool and/or the additional handle on the hand-held power tool, and depending on a resistance which is applied to the hand-held power tool together with the replacement tool and/or the additional handle used, in particular which is connected to the electrical circuit, the resistance causes a distinguishable voltage drop in the electrical circuit, in particular by integrating a different resistance or resistance class for each type of replacement tool, which resistance or resistance class is preferably selected in each case depending on the replacement tool. Preferably, the voltage drop in the circuit is changed by actuating the second release unit, in particular by contacting an additional resistance, in particular by means of a voltage divider circuit. Advantageously, the safety of the hand-held power tool can thereby be increased. In particular, the activation routine for starting or activating the hand-held power tool depending on the replacement tool used can be disabled in different ways. Advantageously, two-handed operation can be ensured in the case of use of relatively dangerous replacement tools, such as grass or bush pruning tools having a length or width of, for example, 30 cm. A "exchangeable tool" is to be understood here to mean, in particular, a tool that can be coupled to a housing of a hand-held power tool, in particular a hand-held power tool, and to a drive unit of the hand-held power tool for driving the respective tool, in a detachable manner and in a drive technology. The exchangeable tool is provided in particular for processing vegetation, in particular grass, shrubs or bushes. An "interchangeable tool interface" is to be understood here to mean, in particular, an interface which is designed for mechanical and drive-related coupling to an interchangeable tool, in particular for coupling to a different interchangeable tool. An "operating unit" is to be understood here to mean, in particular, a unit which advantageously has a plurality of components which can advantageously be actuated directly by an operator and which are provided for influencing and/or changing a process and/or a state of a unit coupled to the operating unit by operation and/or by input parameters. A "control unit" is to be understood here to mean, in particular, a unit which has at least one component which can advantageously be directly actuated by an operator and which is provided for influencing and/or changing a process and/or a state of a unit coupled to the control unit by means of an operation and/or by means of input parameters. The actuating unit comprises, in particular, an actuating element, for example a main switch. An "actuating element, in particular a main switch", is to be understood to mean, in particular, an element which is provided to receive an input variable from an operator during actuation and is in particular directly contacted by the operator, wherein an actuation or touching of the actuating element is sensed and/or an actuating force applied to the actuating element is sensed and/or is mechanically transmitted in order to actuate a unit. In this case, the main switch is intended in particular not only to be provided for contacting or disconnecting the hand-held power tool, in particular indirectly, but it can also change the rotational speed, force, torque or other drive parameters of the hand-held power tool in discrete steps or continuously, depending on the hand-held power tool or the switch or actuator used, for example.

It is proposed that the actuating unit and the first release unit are arranged on a main handle of the hand-held power tool. One-handed operation is thereby possible when using less dangerous replacement tools, for example grass or bush cutters having a length or width of, for example, 16cm or 20 cm. For this purpose, the first release unit and the actuating unit are advantageously spaced apart from one another to a small extent, in particular less than 20cm, preferably about 5cm to 10cm. In particular, the first release unit and the actuating unit are arranged, in particular spaced apart from one another, in such a way that they can be jointly touched by a finger of one hand, in particular the first release element is touched by the thumb of the hand holding the main handle and the actuating element is touched by the index finger or middle finger.

It is proposed that the first release unit is deactivated or switched to be inoperative in the second operating state, in particular at least indirectly via the identification device and/or via a control or regulating unit of the hand-held power tool, in particular that the drive unit is activated only by actuating the second release unit and the actuating unit. However, the first release unit can also be provided for activating the control or regulating unit, in particular from a standby mode, preferably a mode of the hand-held power tool in which no or only very little energy is consumed. The first release unit then brings into contact a control or regulating unit which, for example, checks the control or regulating circuits of the first and second release units, recognizes that the additional handle is applied or that an exchangeable tool requiring the additional handle is applied, and thus only activates the drive unit when the second release unit is actuated in conjunction with the actuating unit. Advantageously, this increases the safety of the hand-held power tool and prevents faulty operation or operation that is regarded as dangerous of the hand-held power tool. The user convenience is increased, in particular by automatically switching off or inactively switching the first release unit and/or, if necessary, the second release unit.

It is proposed that the second release unit is arranged on an additional grip, in particular a T-shaped, annular or O-shaped additional grip and/or on an additional grip which surrounds the handle recess by at least 180 °, preferably by at least 270 °. Such additional handles with release elements are typically known as front handles, additional handles or safety handles to those skilled in the art of hedge shears. They are typically arranged closer to the exchangeable tool and can sometimes also be held in a plurality of gripping positions. The release switch typically extends over a wide, wide or annular gripping area, so that it can be safely and/or intuitively manipulated by gripping the additional handle in a plurality of holding positions of the additional handle.

It is proposed that the additional handle can be arranged on the interchangeable tool interface together with the interchangeable tool or that the additional handle can be arranged on the hand-held power tool separately from the interchangeable tool. When the additional handle can be arranged together with the exchangeable tool on the exchangeable tool interface, they typically have a common base housing, which can be detachably fastened to the hand-held power tool. As a result, the user does not have to arrange the exchangeable tool and the additional handle individually, but rather can arrange them together on the hand-held power tool, which increases the convenience. Sometimes, the requirement for an additional handle is thus unavoidable or ensured. Sometimes, electronic components, such as resistors, circuits, signal plugs, mechanical components, may be integrated into a common component. No additional interfaces are required on the hand-held power tool. Since the additional handle and the exchangeable tool can be arranged together at the exchangeable tool interface, no interface (for example, an interface for separately receiving the additional handle) remains open, in particular in the first operating state. Thereby, contamination of the interface may be avoided and/or safety may be improved, in particular by avoiding exposed electrical contacts or the like.

It is proposed that, in the case of an exchangeable tool, in particular a cutting tool, which is used on an exchangeable tool interface, having a tool length or width of more than 20cm, in particular 25cm to 100cm, the hand-held power tool requires at least one actuation of the second release unit for activating the drive unit. It is proposed that, in the case of a replacement tool, in particular a cutting tool, having a tool length or width of at most 20cm, in particular 5cm to 20cm, the hand-held power tool requires at least one actuation of the first release unit in order to activate the drive unit. This can improve safety for the user or improve convenience of operation.

It is proposed that the identification device be designed electronically and/or mechanically, in particular as a resistance identification unit or voltage divider, in particular for sensing different resistances arranged on the interchangeable tool and/or the additional handle and/or for sensing mechanical elements arranged on the interchangeable tool and/or the additional handle, which mechanical elements, for example when they are arranged on the interchangeable tool interface, act on one or more different switching units of the identification device or the hand-held power tool. Depending on the application, the replacement tool and/or the additional handle arranged on the hand-held power tool can thus be easily and/or safely and/or reliably identified without being affected by contaminants. Sometimes, cost-effective identification means may be provided. Sometimes, the signal from the second release unit, in particular the second release switch, may be guided via a resistor. In this way, the recognition of the interchangeable tool can be carried out in parallel with the signal transmission. The identification device identifies, for example, a resistance or voltage value characteristic for each interchangeable tool from the resistance or voltage signal.

It is proposed that the hand-held power tool has a control or regulating unit which is provided for activating or deactivating the first or second release unit as a function of the interchangeable tool detected by the detection device, for example as a function of a switching signal, a resistance or a voltage. A "control and/or regulating unit" is to be understood to mean, in particular, a unit having at least one control electronics. A "control electronics" is to be understood to mean, in particular, a unit having a processor unit and having a memory unit and having an operating program stored in the memory unit.

The invention also relates to a replacement tool or an attachment handle with an identification element for identification by an identification unit, which replacement tool or attachment handle is provided for use with the hand-held power tool mentioned above.

The invention also relates to a system, in particular a hand-held power tool system, comprising the hand-held power tool mentioned above and at least one exchangeable tool and/or an additional handle. Advantageously, a system that is secure and/or convenient to operate may thereby be provided. Advantageously, the exchangeable tool and/or the additional handle has an identification element which is provided so as to be identifiable by the identification means. Such as resistors, circuits, mechanical elements, such as pins, coding elements, such as chips or the like, which can be read by the identification means. The further exchangeable tool or the further group of exchangeable tools advantageously has a different identification element than the identification element mentioned above. However, the identification device can also be provided as a characteristic identification element for the optical, magnetic, electronic, mechanical or similar identification of a corresponding exchangeable tool or a group of exchangeable tools that can be used, for example, with an additional handle.

"provided" is to be understood in particular to mean specially programmed, provided and/or equipped. In particular, the term "a function that an object is provided with for determining" is to be understood to mean that the object implements and/or executes the determined function in at least one application state and/or operating state.

The invention further relates to a method for controlling a hand-held power tool, in particular for use with an exchangeable tool, in particular for use with a grass or bush cutter, in particular for activating or deactivating a drive unit of a hand-held power tool, wherein the hand-held power tool has a first release unit, in particular a release switch, and an actuating unit, in particular a main switch, which can advantageously be operated with one hand, wherein the hand-held power tool has an identification unit for identifying different exchangeable tools arranged on an exchangeable tool interface of the hand-held power tool and/or an additional handle arranged on the hand-held power tool, wherein the activation for activating the hand-held power tool is adapted or switched depending on an exchangeable tool routine attachment identified on the exchangeable tool interface, such that the drive unit can be activated by the first release unit and/or by the second release unit in conjunction with the actuation of the actuating unit.

In this case, the second release unit is arranged on an additional handle, which can be arranged on the hand-held power tool in a removable manner, in particular in a removable manner together with the exchangeable tool, advantageously on the exchangeable tool interface.

Drawings

Further advantages result from the following description of the figures. An embodiment of the invention is presented in the drawings. The figures, description and claims contain several features which are combined together. Those skilled in the art can also appropriately view and generalize these features individually and in other meaningful combinations.

The figures show:

fig. 1 shows a perspective view of a system according to the invention, in particular a hand-held power tool system with a hand-held power tool and a first exchangeable tool,

figure 2 shows the system according to the invention according to figure 1 in a side view,

fig 3 shows a hand-held power tool according to the invention without a changing tool,

fig. 4 shows a perspective view of a system according to the invention, in particular a hand-held power tool system with a hand-held power tool and a second exchangeable tool and an additional handle,

fig. 5 shows a hand-held power tool system according to the invention with an operating device.

Detailed Description

The invention is based on a hand-held power tool 10 (see fig. 1) for use with a replacement tool 12. The hand-held power tool 10 is provided in particular for use with a grass trimmer 14 or a bush trimmer 16 (see fig. 1, 2, 4). Alternatively, the hand-held power tool 10 can also be connected to other replacement tools. The hand-held power tool 10 has an interchangeable tool interface 18 to which the interchangeable tool 12 can be detachably fastened. Here, the trigger element 21 and the movable latching element 23 of the release mechanism 19 can be seen, by means of which the interchangeable tool 12 can be fastened to the housing of the hand-held power tool 10 and, furthermore, is coupled in terms of drive technology to an output device 25, which is designed as a coupling element by way of example and is driven by the drive unit 20. The interchangeable tool 12 is configured as an example in fig. 1, 2 as a grass trimmer 14 and in fig. 4 as a brush trimmer 16. Fig. 1, 2 and 4 thus show a system of the hand-held power tool 10 described above and at least one exchangeable tool 12. The drive unit 20 is provided for at least indirectly driving the exchangeable tool 12. Additional transmission or shifting elements (not shown here) may be provided. The operating unit 22 comprises a first release unit 24, in particular a first release switch 26, and an actuating unit 28, in particular a main switch 30, wherein the main switch 30 is also provided for discretely or continuously changing the drive parameters of the drive unit 20. The first release unit or first release switch 26 is designed to be touch-sensitive. The first release switch reacts to a touch and/or proximity of an operator, in particular of a body part, preferably a finger, of the operator. The first release switch may be designed as a capacitive release switch or as a release element.

In at least one operating state of the hand-held power tool 10, the first release unit 24, in particular the first release switch 26 or the release element, needs to be actuated in order to activate the drive unit 20 by means of the actuating unit 28. The actuation of the first release unit 24 in combination with the actuation of the actuation unit 28 can function as a safety switch assembly, so that, in particular, an accidental activation of the drive unit as a result of, in particular, an unintentional individual actuation of the actuation unit 28 is prevented. Upon actuation, the actuating unit 28 does not activate the drive unit 20, in particular indirectly via the control or regulating unit 32, directly after the previous actuation of the first release unit 24 or at a defined time interval, for example several milliseconds to several seconds, from the previous actuation of the first release unit 24 or simultaneously with the actuation of the first release unit 24. Once the drive unit 20 and/or the control or regulating unit 32 has been activated once or the drive unit 20 and/or the control or regulating unit 32 has been put into an activated state, there is sometimes, preferably advantageously no need for further or continuous manipulation of the first release unit 24. Sometimes, after a brief interruption of the actuation unit 28 or after an interruption of the operation of the drive unit 20, in particular after the end of the actuation or within a time window of a few seconds, for example a time window of 0 to 15 seconds, in particular 1 second, during which the actuation is interrupted, the first release unit 24 also does not have to be actuated again. The control or regulating unit 32 is connected to an accumulator unit 34, which is used to supply the hand-held power tool 10, in particular the drive unit 20, preferably an electric motor, with energy. In this operating state, in particular in the first operating state, the hand-held power tool 10 can be used, in particular without the replacement tool 12 or with a tool having a maximum length or width which is not exceeded, in particular a less dangerous or non-dangerous replacement tool 12, which advantageously does not require the additional handle 36. The hand-held power tool 10 also has an identification device 38 for identifying the replacement tool 12 arranged on the replacement-tool interface 18 and/or an additional handle 36 arranged on the hand-held power tool 10, in particular the additional handle 36 which can be arranged together with the replacement tool 12 on the replacement-tool interface 18. This is advantageously achieved indirectly via an identification element, here, by way of example, resistors 52, 53, 54, which are arranged on the interchangeable tool 12 or the additional handle 36, in particular on the housing of the hand-held power tool or of the additional handle, and which are provided for connection to an identification circuit 56 of the hand-held power tool 10.

Depending on the detected interchangeable tool 12 and/or the additional handle 36, in the second operating state, at least one second release unit 40, in particular a second release switch 42, has to be actuated in order to activate the drive unit 20 by means of the actuating unit 28. Sometimes, in the event that it is recognized that the exchangeable tool 12 requires an additional handle, in particular that the exchangeable tool 12 requires a two-handed operation, or that such a two-handed operation is recommended or stipulated for the exchangeable tool, the recognition device 38 deactivates or switches the release unit 24 directly or indirectly, for example by means of the control or regulating unit 32, to be unimportant or inactive. For example in the case of a grass or bush cutter 16 or the like having a width or length of greater than 20 cm. The second release unit 40 or the second release switch 42 is preferably disposed on the additional handle 36. An additional handle 36 is provided for gripping by a user's hand. This additional handle enables the user to guide or hold the hand-held power tool 10 safely with the second hand. The second release unit 40 has in particular a second release switch 42 and/or a plurality of second release switches 42, which extend over an angular range of >90 ° on the attachment handle 36.

The second release unit 40, in conjunction with the actuating unit 28, can likewise function as a safety switch assembly, so that, in particular, accidental activation of the drive unit 20 as a result of, in particular, unintentional actuation of the actuating unit 28 alone is prevented. Furthermore, the second release unit advantageously ensures that: the hand-held power tool 10 is held in both hands for activation, so that the user does not accidentally or at least very difficultly cut into the second hand or arm. The actuating unit 28 advantageously activates the drive unit 20 only when it is actuated simultaneously with the second release unit 40, in particular indirectly via the control or regulating unit 32. Advantageously, the drive unit 20 cannot be activated without simultaneous actuation of the second release unit 40, in particular if it is recognized by the recognition device 38 that the replacement tool 12 requires two-handed operation or the use of the additional handle 36 is required or is recommended in this replacement tool. In some cases, the second release unit 40 does not have to be released and operated again after a brief interruption of the actuation of the actuating unit 28 or of the operation of the drive unit 20. Alternative steering schemes are conceivable. In some cases, in particular by means of the control or regulating unit 32 and/or the identification device 38, it is also possible to actuate the first and/or second release unit 24, 40 in conjunction with the actuation of the actuation unit 28 for activating the drive unit 20, in particular when using a replacement tool 12 that does not require an additional handle 36, in particular when this is arranged on the hand-held power tool 10. The second release unit 40 may sometimes function similarly to the first release unit 24, see above. In other words, during actuation, the actuation unit 28 does not activate the drive unit 20 until immediately after the previous actuation of the second release unit 40 or at a defined time interval, for example several milliseconds to several seconds, from the previous actuation of the second release unit 40, in particular indirectly via the control or regulating unit 32 or the like.

The actuating unit 28 and the first release unit 24 are arranged on a main handle 44 of the hand-held power tool 10. Advantageously, the main handle or at least the hand-held power tool has a status and/or command display 46, which is in particular designed as an HMI. Whereby information about the requirement for additional handles 36 may be communicated to the user. The status information can be output to a replacement tool 12 that is used on the hand-held power tool 10 or the replacement-tool interface 18. A warning or use prompt may be output. At times, the hand-held power tool parameters can be set or read. From time to time, it is possible to determine or modify the operating scheme, in particular to determine or modify the requirements or to determine or modify the use with the first or second release unit 24, 40. Information can be output about the Condition Monitoring (conditioning Monitoring) of the hand-held power tool 10, the interchangeable tool 12 and/or the rechargeable battery unit 34. Fault information may be displayed and/or communicated to a user. In conjunction with the read-out and/or transmission module or the wireless connection, the respective information can also be at least transferred to or obtained from a computer or an external computing unit, for example a cloud application or the like.

Advantageously, the first release unit 24 is deactivated or switched to inactive in the second operating state, in particular at least indirectly via the identification device 38 and/or the control or regulating unit 32 of the hand-held power tool 10. However, the first release unit 24 may also be used for a previous active switching (Aktivschaltung) of the control or regulating unit 32, in particular from a standby operating state or a switched energy-free operating state of the hand-held power tool 10. Subsequently, the activation of the drive unit 20 can be effected by merely actuating the second release unit 40 and the actuating unit 28. The second release unit 40 is arranged in particular on the additional grip 36, in particular on the T-shaped or O-shaped additional grip 36 and/or on the additional grip 36 which advantageously surrounds the grip recess 47 by 180 °, preferably by at least 270 °. Advantageously, the additional handle 36 can be arranged on the interchangeable tool interface 18 together with the interchangeable tool 12, in particular by a common housing 48 (see fig. 4) connecting the interchangeable tool 12 to the additional handle 36. Alternatively, however, the additional handle 36 may also be arranged on the hand-held power tool 10 separately from the exchangeable tool 12 (not shown here).

It is proposed that, in the case of a replacement tool 12, in particular a cutting tool, which is used on the replacement-tool interface 18, having a tool length or width of more than 20cm, the hand-held power tool 10 requires at least one actuation of the second release unit 40 in order to activate the drive unit 20. Advantageously, in the case of a replacement tool 12, in particular a cutting tool, having a tool length or width of at most 20cm, in order to activate the drive unit 20 of the hand-held power tool 10, at least one actuation of the first release unit 24 is required in conjunction with an actuation of the actuation unit 28.

The identification means 38 may be electronically and/or mechanically configured. In the present example, the identification device is designed as a resistance identification unit 50, in particular as a voltage divider. The identification device is designed to sense different resistors 52, 54 arranged on the interchangeable tool 12 and/or the additional handle 36. Depending on the interchangeable tool 12, different resistors 52, 54 are arranged on the interchangeable tool 12, in particular on the housing 48 of the interchangeable tool. The contact elements project from the resistors 52, 54 into corresponding contact elements (not shown here) on the hand-held machine tool side. As a result, due to the arrangement of the interchangeable tool 12 on the hand-held power tool 10, an electrical circuit, in particular, proceeding from the hand-held power tool 10, can be closed in order to identify the resistors 52, 54 that are characteristic for the interchangeable tool 12. That is, the identification device 38 is formed by an electrical circuit which is connected to the control or regulating unit 32 and can be identified by different resistors 52, 54 which represent different interchangeable tools 12 which are applied to the interchangeable tool interface 18. Alternative identification methods, such as mechanical, electrical, optical or similar identification methods, are also conceivable. In order to transmit the signal of the second release unit 40, in particular of the second release switch 42, the additional handle 36 has an electrical contact element which is connected to an electrical contact element, in particular a contact element, on the side of the corresponding hand-held power tool in order to transmit the electrical signal of the second release unit to the identification device 38 or to the control or regulating unit 32. By contacting a further resistor, in particular when actuating the second release unit 40, it is possible to recognize not only the interchangeable tool but also the switching state of the additional handle. In this way, contact elements can be saved or additional switching or control circuits can be avoided. As identification means, coded element identification means can also be provided, for example for identifying or reading out an RFID chip. Alternative identification mechanisms with or without mechanical or electronic contacts, such as wireless identification by means of induction, magnetic fields or even transmission/reception units are conceivable.

Finally, the hand-held power tool 10 can be activated or deactivated by means of the first or second release unit 24, 40 in conjunction with the actuation of the actuation unit 28, depending on which replacement tool 12 is used on the hand-held power tool and/or whether the additional handle 36 is used on the hand-held power tool.

Fig. 5 shows a hand-held power tool system 58 with a hand-held power tool 10 arranged on an operating device 60. The operating device 60 is designed as an elongated operating device and has a handle spaced apart from the machine tool receiving interface. The spacing between the machine tool interface and the handle is ensured by a preferably telescopic extension rod, in particular an extension tube. The handling device 60 is here also at least a cart 70. The operating device 60 is provided in connection with the hand-held power tool 10, in particular via a battery interface 62 of the hand-held power tool 10, which can be connected to a power tool receiving interface of the operating device. The operating device has a third release unit 64 and a further actuating unit 66, in particular a further main switch, which have a similar function to the first release unit 24 and the actuating unit 28 of the hand-held power tool 10. The operating device 60 has an identification element 68, in particular a resistor or a circuit, which is provided for being identified by the identification device 38 and/or the control or regulating unit 32 of the hand-held power tool 10. The identification device 38 and/or the control or regulating unit 32 are provided for deactivating or switching the first release unit 24, the actuating unit 28 and/or the second release unit 40 into an inoperative state when it is detected that the operating device 60 is fastened to the hand-held power tool 10. It is thereby ensured that the hand-held power tool 10 can be operated only by the third release unit 64 and the further actuating unit 66 when it is fastened to the operating device 60. This can improve safety and convenience.

In the following, the control or activation of the hand-held power tool 10 is described by way of example. For controlling the hand-held power tool 10, in particular for activating or deactivating the drive unit 20 of the hand-held power tool 10, the hand-held power tool has a first release unit 24, in particular a release switch 26, and an actuating unit 28, in particular a main switch 30. The control or regulating unit 32 is activated from the standby mode by actuating the first release unit 24. Thus, the switching state of the first release unit 24, the switching state of the actuating unit 28 and, at times, the switching state of the second release unit 40 applied to the hand-held power tool 10 can be recognized. In the first operating mode, if the actuating unit 28 is not activated or actuated within 5 seconds after actuating the first release unit 24, a later actuation of the actuating unit 28 does not lead to an activation of the drive unit 20, but rather the first release unit 24 must be actuated again and the actuating unit 28 actuated within 5 seconds. After actuating the drive unit 30 and activating the drive unit 20, the actuation of the actuating unit 28 can be interrupted for at most 1 second without the first release unit 24 having to be actuated again.

In the second operating mode, the control or regulating unit 32 is activated from the standby mode by actuating the first release unit 24 instead. Thus, by means of the control or regulating unit 32, in particular in the function as an identification device 38, a replacement tool 12 can be identified which requires an additional handle 36 or can be identified directly; or the switching state of the first releasing unit 24, the switching state of the manipulating unit 28, and the switching state of the second releasing unit 40 can be recognized. The activation routine is adapted to activate the drive unit 20 of the hand-held power tool 10 as a function of the recognized exchangeable tool 12 applied to the exchangeable tool interface 18 or the recognized additional handle 36 applied to the hand-held power tool 10. The drive unit 20 can now be driven by the second release unit 40 in conjunction with the actuation of the actuation unit 28. Sometimes, after the second release unit 40 has not been actuated for an extended period of time, the actuating unit 28 is actuated after a renewed release for activating the drive unit 20 only by actuating the first release unit 24, the second release unit 40 and advantageously the actuating unit 28 within a minimum of time.

Claims (15)

1. Hand-held power tool (10) for use with a changing tool (12), in particular for use with a grass or shrub trimmer (14, 16), having: an interchangeable tool interface (18) to which an interchangeable tool (12), in particular a grass or shrub pruning tool (14, 16), can be fastened; a drive unit (20) for driving the exchangeable tool (12); an operating unit (22) having a first release unit (24), in particular a first release switch (26), and an actuating unit (28), in particular a main switch (30), wherein, in at least one operating state of the hand-held power tool (10), the first release unit (24) needs to be actuated in order to activate the drive unit (20) by means of the actuating unit (28), characterized in that the hand-held power tool (10) has an identification device (38) for identifying a replacement tool (12) arranged on the replacement tool interface (18) and/or an additional handle (36) arranged on the hand-held power tool (10), in particular an additional handle (36) arranged on the replacement tool interface (18) together with the replacement tool (12), and, depending on the identified replacement tool (12) and/or additional handle (36), in a second operating state, at least one second release unit (40), in particular a second release switch (42), preferably a second release unit (40) arranged on the additional handle (36) in order to activate the drive unit (20) by means of the actuating unit (28) needs to be actuated.

2. The hand-held power tool (10) according to claim 1, characterized in that the actuation unit (28) and the first release unit (24) are arranged on a main handle (44) of the hand-held power tool (10).

3. The hand-held power tool (10) according to claim 1 or 2, characterized in that the first release unit (24), in particular for releasing the actuating unit (28), is deactivated or deactivated in the second operating state, in particular at least indirectly via the identification device (38) and/or a control or regulating unit (32) of the hand-held power tool (10), and/or is switched to deactivated, in particular the activation of the drive unit (20) can only be effected by actuating the second release unit (40) and the actuating unit (28).

4. The hand-held power tool (10) according to any one of the preceding claims, characterized in that the second release unit (40) is arranged on an additional handle (36) which is arranged removably on the hand-held power tool (10), in particular can be arranged in a manner removable together with the exchangeable tool (12), advantageously on the exchangeable tool interface (18).

5. The hand-held power tool (10) according to one of the preceding claims, characterized in that the second release unit (40) is arranged on an additional grip (36), in particular on a T-shaped or O-shaped additional grip (36) and/or on an additional grip (36) which surrounds the grip recess (47) by at least 180 °, preferably by at least 270 °.

6. The hand-held power tool (10) according to one of the preceding claims, characterized in that the additional handle (36) can be arranged on the exchangeable tool interface together with the exchangeable tool (12) or the additional handle (36) can be arranged on the hand-held power tool (10) separately from the exchangeable tool (12).

7. Hand-held power tool (10) according to one of the preceding claims, characterized in that, in the case of an exchangeable tool (12), in particular a cutting tool, applied on the exchangeable tool interface (18) having a tool length or width of more than 20cm, in particular 25cm to 100cm, for example 30cm, the hand-held power tool (10) requires at least one actuation of the second release unit (40) for activating the drive unit (20).

8. The hand-held power tool (10) according to one of the preceding claims, characterized in that, in the case of a tool length or width of the exchangeable tool (12), in particular a cutting tool, of at most 20cm, in particular 5mm to 20cm, the hand-held power tool (10) requires at least one actuation of the first release unit (24) in order to activate the drive unit (20).

9. The hand-held power tool (10) according to one of the preceding claims, characterized in that the identification device (38) is configured electronically and/or mechanically, in particular as a resistance identification unit or voltage divider, in particular for sensing different resistances (52, 54) arranged on the interchangeable tool (12) and/or the additional handle (36) and/or for sensing a mechanical element arranged on the interchangeable tool (12) and/or the additional handle (36), which mechanical element acts on one or more different switching units of the identification device (38) or of the hand-held power tool (10), for example when the mechanical element is arranged on the interchangeable tool interface (18).

10. Hand-held power tool (10) according to one of the preceding claims, characterised in that it has a control or regulating unit (32) which is provided for activating or deactivating the first or second release unit (24, 40) as a function of the replacement tool (12) detected by the detection device (38), for example as a function of a switching signal, a resistance (52, 54) or a voltage, and/or for being brought into an activated state by actuating the first release unit (24), and/or for evaluating the switching state of the first or second release unit (24, 40) in an evaluation manner.

11. The hand-held power tool (10) as claimed in any one of the preceding claims, characterized in that a control or regulating unit (32) forms the detection device (38) and is designed to detect different resistances (52, 54) which are characteristic for different interchangeable tools (12), in particular by means of a voltage divider circuit.

12. An additional handle (36) which is provided for a hand-held power tool (10) according to one of the preceding claims, in particular having a second release unit (40) and/or having an identification element, in particular two resistors (52, 54), preferably it switches only one or two resistors (52, 54), in particular the resistor of a voltage divider circuit for the hand-held power tool (10), depending on the switching state of the second release unit (40).

13. Hand-held power tool system (58) having a hand-held power tool (10), in particular according to one of the preceding claims, and an operating device (60), in particular an extension operating device, preferably a trolley (70), which is provided for connection to the hand-held power tool (10), in particular to a battery interface (62) of the hand-held power tool (10), further having a third release unit (64) and a further operating switch (66), and having an identification element (68), in particular a resistor or a circuit, which is provided for being identified by an identification device (18) and/or the control or regulating unit (32) of the hand-held power tool (10), wherein the identification device (18) and/or the control or regulating unit (32) is/are provided for deactivating or switching the first release unit (24), the operating unit (28) and/or the second release unit (40) into operation when it is identified that the operating device (60) is fastened to the hand-held power tool (10).

14. System, which is composed of a hand-held power tool (10) according to one of the preceding claims and at least one exchangeable tool (12) and/or an additional handle (36) and/or an operating device (60).

15. A method for controlling a hand-held power tool (10), in particular a hand-held power tool (10) for use with a replacement tool (12), in particular a grass or shrub pruning tool (14, 16), in particular for activating or deactivating a drive unit (20) of the hand-held power tool (10), wherein the hand-held power tool (10) has a first release unit (24), in particular a release switch (26), and an actuating unit (28), in particular a main switch (30), the first release unit and the actuating unit advantageously enable one-handed operation of the hand-held power tool (10), wherein the hand-held power tool (10) has an identification device (38) for identifying different replacement tools (12) arranged on a replacement-tool interface (18) of the hand-held power tool (10) and/or an additional handle (36) arranged on the hand-held power tool (10), wherein an activation routine is adapted or switched to activate the hand-held power tool (10) as a function of a replacement tool (12) identified on the replacement-tool interface (18), so that the drive unit (20) can be activated by the first release unit (24) and/or by the second release unit (40) in conjunction with the actuation of the actuation unit (28).

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