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

Abstract

The invention relates to a hand-held power tool for use with exchangeable tools, having an exchangeable tool interface, a drive unit for driving the exchangeable tools, an operating unit, an exchangeable tool, in particular a grass or shrub trimming tool, being able to be fixed on the exchangeable tool interface, the operating unit having a first release unit and a control unit, wherein, in at least one operating state of the hand-held power tool, for activating the drive unit by means of the control unit the first release unit has to be actuated, it is proposed that the hand-held power tool has an identification device for identifying an exchangeable tool arranged on the exchangeable tool interface and / or an additional handle arranged on the hand-held power tool, and that, depending on the identified exchangeable tool and / or additional handle, in a second operating state for activating the drive unit by means of the control unit at least one second release unit has to be actuated. 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

Background Technology

[0001] The handheld machine tool as described in the preamble of claim 1 is already known. Summary of the Invention

[0002] This invention relates to a handheld machine tool. A suitable extension is derived from the preferred embodiment.

[0003] The present invention is a handheld power tool for use with replaceable tools, particularly with grass or shrub trimming tools, comprising: a replaceable tool interface on which replaceable tools, particularly grass or shrub trimming tools, can be fixed; a drive unit for driving the replaceable tools; and an operating unit having a first release unit, particularly a first release switch, and an operating unit, particularly a main switch, wherein, in at least one operating state of the handheld power tool, the first release unit needs to be operated in order to activate the drive unit by means of the operating unit.

[0004] It is proposed that a handheld power tool has an identification device for identifying replaceable tools arranged on a replaceable tool interface and / or additional handles arranged on the handheld power tool, especially additional handles arranged together with replaceable tools and replaceable tool interfaces. Furthermore, based on the identified replaceable tool and / or additional handle, in a second operating state, in order to activate the drive unit by means of an operating unit, it is necessary to operate at least one second release unit, especially a second release switch, preferably a second release unit arranged on the additional handle. In particular, a switching signal can be transmitted from the second release unit to or sensed by the handheld power tool, for example via a circuit closed by arranging the replaceable tool and / or additional handle on the handheld power tool, and based on a resistor applied to the handheld power tool together with the applied replaceable tool and / or additional handle, especially connected to the circuit, this resistor causes a distinguishable voltage drop in the circuit, especially by integrating different resistors or resistance levels for each replaceable tool type, preferably selecting the resistor or resistance level separately according to the replaceable tool. Preferably, the voltage drop in the circuit is changed by manipulating the second release unit, particularly by contacting an additional resistor, especially by means of a voltage divider circuit. Advantageously, this improves the safety of the handheld machine tool. In particular, the activation routine for starting or activating the handheld machine tool according to the replaceable tool used can fail in different ways. Advantageously, in the case of using relatively dangerous replaceable tools, such as grass or shrub trimming tools with a length or width of, for example, 30 cm, two-handed operation can be ensured. "Replaceable tool" should be understood here in particular as a tool that can be coupled to the handheld machine tool, especially the housing of the handheld machine tool, and detachably and technically to the drive unit of the handheld machine tool for driving the various tools. Replaceable tools are particularly designed for processing vegetation, especially grass, shrubs, or dwarf. "Replaceable tool interface" should be understood here in particular as an interface constructed for mechanical and technical coupling with replaceable tools, especially constructed for coupling with different replaceable tools. The term "operating unit" should be understood herein in particular as a unit that advantageously has multiple components, which are advantageously directly operable by an operator and configured to influence and / or change the process and / or state of a unit coupled to the operating unit by operation and / or by input parameters. The term "operating unit" should also be understood herein in particular as a unit that has at least one component, which is advantageously directly operable by an operator and configured to influence and / or change the process and / or state of a unit coupled to the operating unit by operation and / or by input parameters. The operating unit particularly includes an operating element, such as a main switch."Actuating element, especially main switch" should be understood in particular as an element configured to receive input parameters from the operator during operation and, in particular, to be directly contacted by the operator, wherein the manipulation or touch of the operating element is sensed and / or the operating force applied to the operating element is sensed and / or the operating force is mechanically transmitted for operating a unit. Here, the main switch should not only be configured to indirectly contact or disconnect the handheld machine tool, but also to change the speed, force, torque, or other drive parameters of the handheld machine tool, either in discrete steps or continuously, depending on the handheld machine tool or the switch or regulator used.

[0005] It is proposed that the operating unit and the first release unit are arranged on the main handle of the handheld tool. This allows for one-handed operation when using less hazardous replaceable tools, such as grass or shrub trimming tools with a length or width of, for example, 16 cm or 20 cm. For this purpose, the first release unit and the operating unit are advantageously spaced relatively close to each other, particularly less than 20 cm, preferably about 5 cm to 10 cm. Specifically, the first release unit and the operating unit are arranged, and especially spaced apart, so that both can be accessed by the fingers of one hand, particularly the first release element by the thumb of the hand holding the main handle and the operating element by the index or middle finger.

[0006] It is proposed that the first release unit is deactivated or switched to inactive in the second operating state, particularly at least indirectly through the identification device and / or through the control or adjustment unit of the handheld machine tool. Specifically, activation of the drive unit is achieved only by manipulating the second release unit and the operation unit. However, the first release unit can still be provided to activate the control or adjustment unit, particularly from standby mode, preferably a mode of the handheld machine tool (in which no energy is consumed or only very little energy is consumed). This first release unit then contacts the control or adjustment unit, which, for example, checks the control or adjustment circuits of the first and second release units, identifies that the additional handle is applied or requests the application of a replaceable tool with the additional handle, and thus activates the drive unit only when the second release unit is operated in conjunction with the operation unit. Advantageously, this improves the safety of the handheld machine tool and avoids malfunctioning or dangerous operation. It also improves user convenience, particularly by automatically shutting down or inactively switching the first release unit and / or switching the second release unit when necessary.

[0007] It is proposed that the second release unit is arranged on an additional handle, particularly a T-shaped, ring-shaped, or O-shaped additional handle and / or an additional handle that surrounds the handle recess by at least 180°, preferably at least 270°. Such additional handles with release elements are typically known to those skilled in the art of hedge trimmers as front handles, additional handles, or safety handles. They are typically arranged closer to the replaceable tool and can sometimes be held in multiple gripping positions. The release switch typically extends over a wide, broad, or ring-shaped gripping area, allowing it to be safely and / or intuitively operated by gripping the additional handle in multiple holding positions.

[0008] It is proposed that the auxiliary handle can be arranged together with the replaceable tool on the replaceable tool interface, or the auxiliary handle can be arranged separately from the replaceable tool on the handheld machine tool. When the auxiliary handle can be arranged together with the replaceable tool on the replaceable tool interface, they typically have a common basic housing that can be detachably fixed to the handheld machine tool. Thus, the user does not have to arrange the replaceable tool and the auxiliary handle separately, but can arrange them together on the handheld machine tool, which improves convenience. Sometimes, the requirement for an auxiliary handle is thus unavoidable or ensured. Sometimes, electronic components, such as resistors, circuits, signal plugs, and mechanical components, can be integrated into a common component. No additional interface is needed on the handheld machine tool. Since the auxiliary handle and the replaceable tool can be arranged together on the replaceable tool interface, no interface (e.g., an interface for separately receiving the auxiliary handle) remains open, especially in the first operating state. This avoids contamination of the interface and / or, in particular, improves safety by avoiding exposed electrical contacts.

[0009] It is proposed that, when replaceable tools, especially cutting tools, applied to replaceable tool interfaces have a tool length or width greater than 20 cm, particularly 25 cm to 100 cm, handheld power tools require at least one operation of a second release unit to activate the drive unit. It is also proposed that, when replaceable tools, especially cutting tools, have a maximum tool length or width of 20 cm, particularly 5 cm to 20 cm, handheld power tools require at least one operation of a first release unit to activate the drive unit. This can improve user safety or operational convenience.

[0010] The identification device is proposed to be electronically and / or mechanically constructed, particularly as a resistance identification unit or voltage divider, especially for sensing different resistances arranged on replaceable tools and / or additional handles and / or for sensing mechanical elements arranged on replaceable tools and / or additional handles, which, for example, act on one or more different switching units of the identification device or handheld tool when arranged on the replaceable tool interface. Depending on the application, this allows for simple and / or safe and / or contamination-resistant and / or reliable identification of replaceable tools and / or additional handles arranged on handheld toolers. Sometimes, cost-effective identification devices can be provided. Sometimes, signals from a second release unit, particularly a second release switch, can be guided via a resistor. Thus, identification of replaceable tools can be performed in parallel with signal transmission. The identification device identifies, for example, resistance or voltage values ​​characterizing each replaceable tool based on resistance or voltage signals.

[0011] It is proposed that the handheld machine tool has a control or adjustment unit configured to activate or deactivate a first or second release unit based on a replaceable tool identified by an identification device, for example, based on a switching signal, resistance, or voltage. The term "control and / or adjustment unit" should be understood in particular as a unit having at least one control electronics. The term "control electronics" should be understood in particular as a unit having a processor unit, a storage unit, and an operating program stored in the storage unit.

[0012] The present invention also relates to a replaceable tool or additional handle having an identification element for identification by an identification unit, the replaceable tool or additional handle being configured for use with the aforementioned handheld machine tool.

[0013] The present invention also relates to a system, particularly a handheld machine tool system comprising the aforementioned handheld machine tool and at least one replaceable tool and / or an additional handle. Advantageously, this provides a safe and / or conveniently operable system. Advantageously, the replaceable tool and / or additional handle has an identification element configured to be identifiable by an identification device. This identification element may be, for example, a resistor, circuit, mechanical component, such as a pin, coded element, such as a chip or the like readable by the identification device. Another replaceable tool or another set of replaceable tools advantageously has an identification element different from the identification element mentioned above. However, the identification device may also be configured to optically, magnetically, electronically, mechanically, or similarly identify the characteristic identification element of a corresponding replaceable tool or a set of replaceable tools, such as those usable with an additional handle.

[0014] "Set up" should be understood in particular as specifically programming, configuring, and / or equipping. "An object set up for a defined function" should be understood in particular as the object implementing and / or performing the defined function in at least one application state and / or runtime state.

[0015] The present invention also relates to a method for controlling a handheld power tool, particularly for use with replaceable tools, especially for use with grass or shrub trimming tools, and particularly for activating or deactivating a drive unit of the handheld power tool, wherein the handheld power tool has a first release unit, particularly a release switch, and an operating unit, particularly a main switch, the first release unit and the operating unit being advantageously capable of single-handed operation, wherein the handheld power tool has an identification unit for identifying different replaceable tools arranged on the replaceable tool interface of the handheld power tool and / or additional handles arranged on the handheld power tool, wherein, based on the replaceable tool attachment identified on the replaceable tool interface, an activation routine for activating the handheld power tool is adapted or switched, such that the drive unit can be activated by the operation of the operating unit in conjunction with the first release unit and / or by the second release unit.

[0016] The second release unit is arranged on an additional handle that can be detachably mounted on a handheld machine tool, particularly in a manner that allows it to be removed together with a replaceable tool, and is advantageously mounted on a replaceable tool interface. Attached Figure Description

[0017] Further advantages are described in the accompanying drawings. One embodiment of the invention is presented in the drawings. The drawings, description, and claims contain multiple features combined together. Those skilled in the art may also appropriately view these features individually and generalize them into other meaningful combinations.

[0018] The attached diagram shows:

[0019] Figure 1 A perspective view is shown of the system according to the invention, particularly a handheld machine tool system having a handheld machine tool and a first changeover tool.

[0020] Figure 2 Shown in side view according to Figure 1 The system according to the present invention,

[0021] Figure 3 A handheld machine tool according to the invention, without a replaceable tool, is shown.

[0022] Figure 4 A perspective view is shown of the system according to the invention, particularly a handheld machine tool system having a handheld tool and a second interchangeable tool, as well as an additional handle.

[0023] Figure 5 A handheld machine tool system with an operating device according to the present invention is shown. Detailed Implementation

[0024] The present invention relates to a handheld power tool 10 for use with a changeover tool 12 (see also: Figure 1 ) to begin. The handheld tool 10 is specifically designed for use with the grass trimmer 14 or the bush trimmer 16 (see Figure 1 , 2 4). Alternatively, the handheld power tool 10 can also be connected to other replaceable tools. The handheld power tool 10 has a replaceable tool interface 18, to which the replaceable tool 12 can be detachably fixed. Here can be seen the trigger element 21 and the movable locking element 23 of the disassembly mechanism 19, through which the replaceable tool 12 can be fixed to the housing of the handheld power tool 10, and further coupled in drive technology to the output device 25 driven by the drive unit 20, which is exemplarily configured as a coupling element. The replaceable tool 12 is exemplarily in Figure 1 , 2 The middle structure is a grass trimming tool 14 and in Figure 4 The middle part is a shrub pruning tool 16. Therefore, Figure 1 , 2 Figures 4 and 5 illustrate a system comprising the aforementioned handheld power tool 10 and at least one replaceable tool 12. The drive unit 20 is configured to drive the replaceable tool 12 at least indirectly. Additional transmission or speed-changing elements (not shown here) may be provided. The operating unit 22 includes a first release unit 24, particularly a first release switch 26, and an operating unit 28, particularly a main switch 30, wherein the main switch 30 is also configured to discretely or continuously change the drive parameters of the drive unit 20. The first release unit or first release switch 26 is configured to be touch-sensitive. This first release switch responds to the touch and / or proximity of the operator, particularly the touch or proximity of the operator's body parts, preferably fingers. This first release switch may be configured as a capacitive release switch or release element.

[0025] In at least one operating state of the handheld machine tool 10, activating the drive unit 20 by means of the operating unit 28 requires operating the first release unit 24, in particular the first release switch 26, or release element. The operation of the first release unit 24, combined with the operation of the operating unit 28, acts as a safety switch assembly, preventing accidental activation of the drive unit, especially by unintentionally operating the operating unit 28 alone. During operation, the operating unit 28 activates the drive unit 20 immediately after, or at a defined time interval from, the operation of the first release unit 24, such as a few milliseconds to a few seconds, or simultaneously with the operation of the first release unit 24, particularly indirectly via the control or adjustment unit 32. Once the drive unit 20 and / or the control or adjustment unit 32 has been activated once, or once the drive unit 20 and / or the control or adjustment unit 32 has been placed in an activated state, it is sometimes, preferably advantageously, unnecessary to further or continuously operate the first release unit 24. Sometimes, after a brief interruption of operation of the control unit 28 or after an interruption of operation of the drive unit 20, especially within a few seconds after the end of operation or the beginning of the interruption of operation, such as 0 to 15 seconds, especially 1 second, the first release unit 24 does not need to be re-operated. The control or regulation unit 32 is connected to the battery unit 34, which supplies power to the handheld power tool 10, especially the drive unit 20, preferably the electric motor. In this operating state, especially the first operating state, the handheld power tool 10 can be used, especially without the replaceable tool 12, or with tools not exceeding the maximum length or width, especially the less dangerous or non-dangerous replaceable tool 12, which advantageously does not require an additional handle 36. The handheld power tool 10 also has an identification device for identifying the replaceable tool 12 arranged on the replaceable tool interface 18 and / or the additional handle 36 arranged on the handheld power tool 10, especially the additional handle 36 that can be arranged together with the replaceable tool 12 on the replaceable tool interface 18. This is advantageously achieved indirectly by means of identification elements arranged on the housing of the replaceable tool 12 or the additional handle 36, especially the handheld tool or the additional handle, exemplarily resistors 52, 53, and 54, which are configured to be connected to the identification circuit 56 of the handheld tool 10.

[0026] Based on the identified replaceable tool 12 and / or additional handle 36, in the second operating state, at least one second release unit 40, particularly a second release switch 42, needs to be operated to activate the drive unit 20 via the operating unit 28. Sometimes, when it is identified that the replaceable tool 12 requires an additional handle, particularly when the replaceable tool 12 requires two-handed operation or when such two-handed operation is recommended or compliant for the replaceable tool, the identification device directly or indirectly, for example, by controlling or adjusting the unit 32, deactivating the release unit 24 or switching the release unit to an unimportant or inactive state. For example, in the case of a grass or shrub trimming tool 16 or similar with a width or length greater than 20 cm. The second release unit 40 or the second release switch 42 is preferably arranged on the additional handle 36. The additional handle 36 is configured for gripping by the user's hand. This additional handle allows the user to safely guide or hold the handheld tool 10 with a second hand. The second release unit 40 has, in particular, one second release switch 42 and / or multiple second release switches 42, which extend on the additional handle 36 in an angular range of >90°.

[0027] The second release unit 40, in conjunction with the operating unit 28, also functions as a safety switch assembly, particularly preventing accidental activation of the drive unit 20 due to unintentional, singular operation of the operating unit 28. Furthermore, this second release unit advantageously ensures that the handheld tool 10 is activated by both hands, preventing the user from accidentally, or at least with great difficulty, cutting into their second hand or arm. The operating unit 28 advantageously activates the drive unit 20 only when it is operated simultaneously with the second release unit 40, particularly indirectly via the control or adjustment unit 32. Advantageously, the drive unit 20 cannot be activated without simultaneous operation of the second release unit 40, especially when the identification device indicates that the changeover tool 12 requires two-handed operation or the use of the additional handle 36, or when such two-handed operation or the use of the additional handle is recommended in the changeover tool. Sometimes, after a brief interruption of operation of the operating unit 28 or interruption of the operation of the drive unit 20, the second release unit 40 need not be released and re-operated. Alternative operating schemes are conceivable. Sometimes, especially through the control or adjustment unit 32 and / or the identification device, the manipulation of the first and / or second release units 24, 40 can be combined with the manipulation of the operation unit 28 to activate the drive unit 20, particularly when using a replaceable tool 12 that does not require an additional handle 36, especially when the additional handle is arranged on a handheld machine tool 10. The second release unit 40 can sometimes function similarly to the first release unit 24, see above. In other words, during manipulation, the operation unit 28 activates the drive unit 20 immediately after or after a defined time interval, such as a few milliseconds to a few seconds, following or after the previous manipulation of the second release unit 40, particularly indirectly through the control or adjustment unit 32 or the like.

[0028] The control unit 28 and the first release unit 24 are arranged on the main handle 44 of the handheld power tool 10. Advantageously, the main handle or at least the handheld power tool has a status and / or instruction display device 46, particularly configured as an HMI. Information regarding the request for the attached handle 36 can be transmitted to the user. Status information can be output to the replacement tool 12 applied to the handheld power tool 10 or the replacement tool interface 18. Warnings or usage prompts can be output. Sometimes, parameters of the handheld power tool can be adjusted or read. Sometimes, operating procedures can be determined or modified, particularly determining or modifying requirements or determining or modifying whether to use with the first or second release units 24, 40. Information regarding condition monitoring of the handheld power tool 10, the replacement tool 12, and / or the battery unit 34 can be output. Fault information can be displayed and / or transmitted to the user. In conjunction with a readout and / or transmission module or wireless connection, the information can also be transferred to or obtained from a computer or external computing unit, such as a cloud application or the like.

[0029] Advantageously, the first release unit 24 is deactivated or switched to inactive in the second operating state, especially at least indirectly through the identification device and / or control or adjustment unit 32 of the handheld machine tool 10. However, the first release unit 24 can sometimes also be used for the previous activation switching of the control or adjustment unit 32, especially from the standby operating state or the switched powerless operating state of the handheld machine tool 10. Subsequently, the drive unit 20 can be activated simply by manipulating the second release unit 40 and the operating unit 28. The second release unit 40 is particularly arranged on the auxiliary handle 36, especially the T-shaped or O-shaped auxiliary handle 36 and / or the auxiliary handle 36 that advantageously surrounds the handle notch 47 by 180°, preferably at least 270°. Advantageously, the auxiliary handle 36 can be connected to the changeover tool 12, especially through the common housing 48 (see Figure 4 The tool is located on the interchangeable tool interface 18. Alternatively, the additional handle 36 may be located separately from the interchangeable tool 12 on the handheld tool 10 (not shown here).

[0030] It is proposed that when the replaceable tool 12, especially the cutting tool, applied to the replaceable tool interface 18 of the handheld power tool 10 has a tool length or width greater than 20 cm, at least one operation of the second release unit 40 is required to activate the drive unit 20. Advantageously, when the replaceable tool 12, especially the cutting tool, has a tool length or width of up to 20 cm, at least one operation of the first release unit 24 is required in conjunction with the operation of the operation unit 28 in order to activate the drive unit 20 of the handheld power tool 10.

[0031] The identification device can be constructed electronically and / or mechanically. In the current example, the identification device is constructed as a resistance identification unit 50, particularly a voltage divider. This identification device is configured to sense different resistors 52, 54 arranged on the replaceable tool 12 and / or the additional handle 36. Depending on the replaceable tool 12, different resistors 52, 54 are arranged on the replaceable tool 12, particularly on its housing 48. Contact elements extend from the resistors 52, 54 into corresponding (not shown here) contact elements on the handheld tool side. Therefore, since the replaceable tool 12 is arranged on the handheld tool 10, a circuit, particularly originating from the handheld tool 10, can be closed to identify the resistors 52, 54 that are characteristic of the replaceable tool 12. That is, the identification device is formed by a circuit connected to the control or adjustment unit 32 and can be identified by different resistors 52, 54 representing different replaceable tools 12 applied to the replaceable tool interface 18. Alternative identification methods are also conceivable, such as mechanical, electrical, optical, or similar methods. For transmitting signals from the second release unit 40, and in particular the second release switch 42, the additional handle 36 has electrical contact elements connected to corresponding electrical contact elements, particularly contact elements, on the handheld tool side, so as to transmit the electrical signal of the second release unit to the identification device or control or adjustment unit 32. By contacting another resistor, especially when operating the second release unit 40, not only the changeover tool but also the switching state of the additional handle can be identified. This saves contact elements or avoids additional switching or adjustment circuits. An coded element identification device, such as one for identifying or reading RFID chips, can also be provided as the identification device. Alternative identification mechanisms, with or without mechanical or electronic contacts, such as wireless identification via induction, magnetic fields, or even transmitting / receiving units, are conceivable.

[0032] Finally, the handheld power tool 10 can be activated or deactivated by means of the first or second release unit 24, 40 in conjunction with the operation of the control unit 28, depending on what kind of replaceable tool 12 is applied to the handheld power tool and / or whether the additional handle 36 is applied to the handheld power tool.

[0033] Figure 5 A handheld power tool system 58 is shown, having a handheld power tool 10 arranged on an operating device 60. The operating device 60 is configured as an extended operating device and has a handle spaced apart from the power tool receiving interface. The distance between the power tool interface and the handle is ensured by a telescopic extension rod, in particular an extension tube. The operating device 60 is also at least a trolley 70. The operating device 60 is configured to connect to the handheld power tool 10, in particular via the battery interface 62 of the handheld power tool 10, which can be connected to the power tool receiving interface of the operating device. The operating device has a third release unit 64 and another operating unit 66, in particular another main switch, which have similar functions to the first release unit 24 and operating unit 28 of the handheld power tool 10. The operating device 60 has an identification element 68, in particular a resistor or circuit, configured to be identified by the identification device and / or control or adjustment unit 32 of the handheld power tool 10. The identification device and / or control or adjustment unit 32 is configured to deactivate or disable the first release unit 24, the operating unit 28, and / or the second release unit 40 when it is detected that the operating device 60 is fixed to the handheld power tool 10. This ensures that when the handheld power tool 10 is secured to the operating device 60, operation of the handheld power tool can only be achieved through the third release unit 64 and another operating unit 66. This improves both safety and convenience.

[0034] The control or activation of the handheld power tool 10 is described below by way of example. To control the handheld power tool 10, and particularly to activate or deactivate the drive unit 20 of the handheld power tool 10, the handheld power tool has a first release unit 24, particularly a release switch 26, and an operating unit 28, particularly a main switch 30. By operating the first release unit 24, the control or adjustment unit 32 is activated from standby mode. Therefore, the switching state of the first release unit 24, the switching state of the operating unit 28, and sometimes the switching state of the second release unit 40 applied to the handheld power tool 10 can be identified. In the first operating mode, if the operating unit 28 is not activated or operated within 5 seconds after operating the first release unit 24, a later operation of the operating unit 28 will not cause activation of the drive unit 20; instead, the first release unit 24 must be operated again, and the operating unit 28 must be operated within 5 seconds. After operating the drive unit 30 and activating the drive unit 20, operation of the operating unit 28 can be interrupted for up to 1 second without having to operate the first release unit 24 again.

[0035] In the second operating mode, the control or adjustment unit 32 is activated from the standby mode by manipulating the first release unit 24. Therefore, the control or adjustment unit 32, particularly in its function as an identification device, can identify the replaceable tool 12 requiring an additional handle 36, or can directly identify the additional handle; or can identify the switching state of the first release unit 24, the switching state of the operation unit 28, and the switching state of the second release unit 40. Based on the replaceable tool 12 identified on the replaceable tool interface 18 or the additional handle 36 identified on the handheld power tool 10, an activation routine is adapted to activate the drive unit 20 of the handheld power tool 10. The drive unit 20 can now be driven in conjunction with the operation of the operation unit 28 via the second release unit 40. Sometimes, after a prolonged period without manipulating the second release unit 40, the operation unit 28 is re-released before the drive unit 20 is activated by manipulating the first release unit 24, the second release unit 40, and advantageously the operation unit 28 in the shortest possible time.

Claims

1. A handheld power tool (10) for use with a replaceable tool (12), the handheld power tool having: a replaceable tool interface (18) on which a replaceable tool (12) can be fixed; a drive unit (20) for driving the replaceable tool (12); and an operation unit (22) having a first release unit (24) and an operating unit (28), wherein, In at least one operating state of the handheld power tool (10), in order to activate the drive unit (20) by means of the operating unit (28), it is necessary to operate the first release unit (24). The handheld power tool (10) is characterized by having an identification device for identifying a replaceable tool (12) arranged on the replaceable tool interface (18) and / or an additional handle (36) arranged on the handheld power tool (10), and, based on the identified replaceable tool (12) and / or additional handle (36), in a second operating state, in order to activate the drive unit (20) by means of the operating unit (28), The drive unit (20) needs to operate at least one second release unit (40), wherein the first release unit (24) is deactivated or inactive in the second operating state, and / or the second release unit (40) is arranged on an additional handle (36) detachably arranged on the handheld tool (10), and / or the handheld tool has a control or adjustment unit (32) configured to activate or deactivate the first or second release unit (24, 40) based on a replaceable tool (12) identified by the identification device.

2. The handheld machine tool (10) according to claim 1, characterized in that, The replaceable tool (12) is a grass or shrub trimming tool (14, 16).

3. The handheld machine tool (10) according to claim 1, characterized in that, The first release unit (24) is configured as a first release switch (26).

4. The handheld machine tool (10) according to claim 1, characterized in that, The control unit (28) is configured as the main switch (30).

5. The handheld machine tool (10) according to claim 1, characterized in that, The additional handle (36) is arranged together with the replaceable tool (12) on the replaceable tool interface (18).

6. The handheld machine tool (10) according to claim 1, characterized in that, The second release unit (40) is configured as a second release switch (42).

7. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, The operating unit (28) and the first release unit (24) are arranged on the main handle (44) of the handheld machine tool (10).

8. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, The first release unit (24) is used to release the manipulation unit (28) from being deactivated or inactive in the second operating state.

9. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, The additional handle (36) can be arranged in a manner that allows it to be removed together with the replaceable tool (12).

10. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, The second release unit (40) is arranged on an additional handle (36) in a T-shape or O-shape and / or on an additional handle (36) that surrounds the handle notch (47) by at least 180°.

11. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, The additional handle (36) can be arranged together with the replaceable tool (12) on the replaceable tool interface, or the additional handle (36) can be arranged separately from the replaceable tool (12) on the handheld tool (10).

12. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, When the replaceable tool (12) applied to the replaceable tool interface (18) has a tool length or width greater than 20 cm, the handheld tool (10) requires at least one operation of the second release unit (40) in order to activate the drive unit (20).

13. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, When the replaceable tool (12) has a maximum tool length or width of 20 cm, the handheld tool (10) requires at least one operation of the first release unit (24) in order to activate the drive unit (20).

14. The handheld machine tool (10) according to any one of claims 1 to 6, characterized in that, The identification device is constructed electronically and / or mechanically.

15. The handheld machine tool (10) according to claim 14, characterized in that, The identification device is configured as a resistance identification unit or voltage divider for sensing different resistors (52, 54) arranged on the replaceable tool (12) and / or the additional handle (36) and / or for sensing mechanical components arranged on the replaceable tool (12) and / or the additional handle (36).

16. The handheld machine tool (10) according to claim 15, characterized in that, The mechanical element, when arranged on the interchangeable tool interface (18), acts on one or more different switching units of the identification device or the handheld machine tool (10).

17. The handheld machine tool (10) according to claim 15 or 16, characterized in that, The control or adjustment unit (32) is configured to be put into an active state by manipulating the first release unit (24), and / or to analyze and evaluate the switching state of the first or second release unit (24, 40).

18. The handheld machine tool (10) according to claim 17, characterized in that, The control or adjustment unit (32) is configured to activate or deactivate the first or second release unit (24, 40) based on the replaceable tool (12) identified by the identification device, according to a switching signal, resistor (52, 54) or voltage.

19. The handheld machine tool (10) according to claim 17, characterized in that, The control or adjustment unit (32) constitutes the identification device and is configured to identify different resistances (52, 54) that are characteristic of different replacement tools (12).

20. The handheld machine tool (10) according to claim 19, characterized in that, The control or regulation unit (32) is configured to identify different resistances (52, 54) that are characteristic of different replacement tools (12) by means of a voltage divider circuit.

21. The handheld machine tool (10) according to claim 8, characterized in that, The first release unit (24) is deactivated or switched to be inactive at least indirectly through the identification device and / or control or adjustment unit (32) of the handheld machine tool (10).

22. The handheld machine tool (10) according to claim 8, characterized in that, The activation of the drive unit (20) can only be achieved by manipulating the second release unit (40) and the manipulation unit (28).

23. The handheld machine tool (10) according to claim 9, characterized in that, The additional handle (36) can be detachably mounted on the replaceable tool interface (18).

24. The handheld machine tool (10) according to claim 10, characterized in that, The second release unit (40) is arranged on an additional handle (36) that surrounds the handle notch (47) at least 270°.

25. The handheld machine tool (10) according to claim 12, characterized in that, The replaceable tool (12) is a cutting tool.

26. The handheld machine tool (10) according to claim 12, characterized in that, When the replaceable tool (12) applied to the replaceable tool interface (18) has a tool length or width of 25 cm to 100 cm, the handheld tool (10) requires at least one operation of the second release unit (40) in order to activate the drive unit (20).

27. The handheld machine tool (10) according to claim 12, characterized in that, When the replaceable tool (12) applied to the replaceable tool interface (18) has a tool length or width of 30 cm, the handheld tool (10) requires at least one operation of the second release unit (40) in order to activate the drive unit (20).

28. The handheld machine tool (10) according to claim 13, characterized in that, The replaceable tool (12) is a cutting tool.

29. The handheld machine tool (10) according to claim 13, characterized in that, When the replaceable tool (12) has a tool length or width of 5 mm to 20 cm, the handheld tool (10) requires at least one operation of the first release unit (24) in order to activate the drive unit (20).

30. An additional handle (36) configured for use with a handheld machine tool (10) according to any one of claims 1 to 29, the additional handle having a second release unit (40) and / or having an identification element.

31. The additional handle (36) according to claim 30, characterized in that, The identification element is two resistors (52, 54), wherein only one or both resistors (52, 54) are switched according to the switching state of the second release unit (40).

32. The additional handle (36) according to claim 31, characterized in that, The resistors (52, 54) of the voltage divider circuit for the handheld machine tool (10) are switched according to the switching state of the second release unit (40).

33. A handheld machine tool system (58) comprising a handheld machine tool (10) according to any one of claims 1 to 29 and an operating device (60), the operating device being configured to be connected to the handheld machine tool (10), the handheld machine tool system further comprising a third release unit (64) and another operating switch (66) and having an identification element (68) configured to be identified by the identification device of the handheld machine tool (10) and / or the control or adjustment unit (32), wherein, The identification device and / or the control or adjustment unit (32) are configured to deactivate or switch the first release unit (24), the manipulation unit (28) and / or the second release unit (40) to non-function when the operation device (60) is identified as being fixed on the handheld machine tool (10).

34. The handheld machine tool system (58) according to claim 33, characterized in that, The operating device (60) is an extended operating device.

35. The handheld machine tool system (58) according to claim 33, characterized in that, The operating device (60) is a trolley (70).

36. The handheld machine tool system (58) according to claim 33, characterized in that, The operating device is configured to connect to the battery interface (62) of the handheld machine tool (10).

37. The handheld machine tool system (58) according to claim 33, characterized in that, The identification element (68) is a resistor or a circuit.

38. A system comprising a handheld machine tool (10) according to any one of claims 1 to 29 and at least one replaceable tool (12) and / or an additional handle (36) and / or an operating device (60).

39. A method for controlling a handheld machine tool (10) according to any one of claims 1 to 29, wherein, The handheld power tool (10) has a first release unit (24) and an operating unit (28). The handheld power tool (10) has an identification device for identifying different replaceable tools (12) arranged on the replaceable tool interface (18) of the handheld power tool (10) and / or an additional handle (36) arranged on the handheld power tool (10). An activation routine is adapted or switched to activate the handheld power tool (10) according to the replaceable tool (12) identified on the replaceable tool interface (18), so that the drive unit (20) can be activated by the operation of the operating unit (28) in conjunction with the first release unit (24) and / or the second release unit (40).

40. The method according to claim 39, characterized in that, The method is configured to activate or deactivate the drive unit (20) of the handheld machine tool (10).

41. The method according to claim 39, characterized in that, The first release unit (24) is configured as a first release switch (26).

42. The method according to claim 39, characterized in that, The control unit (28) is configured as the main switch (30).

43. The method according to claim 39, characterized in that, The first release unit and the operating unit enable one-handed operation of the handheld machine tool (10).

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