Handheld machine tools

Abstract

The present invention relates to a handheld power tool, in particular an angle grinder, comprising a drive unit for driving an accessory tool, in particular a grinding disc and / or a cutting disc, a switching unit for switching the drive unit, an operating unit for operating the switching unit, and a locking unit for locking the operating unit. The present invention provides that the locking unit can be unlocked depending on an operating force acting on the operating unit.

Description

Technical Field

[0001] The invention relates to a handheld machine tool. Background Art

[0002] DE 10 2011 089 717 A1 discloses a machine tool switching device having at least one switching unit, which has at least one movably supported operating element for operating a mechanical, electrical and / or electronic switching element. The machine tool switching device has a guide unit, which is configured to convert the movement of the operating element along the main extension direction into at least a movement of the operating element extending transversely to the main extension direction when the operating element is operated along the main extension direction of the operating element. Summary of the Invention

[0003] The object of the present invention is to improve a handheld power tool using simple structural measures.

[0004] This object is achieved by a handheld power tool, in particular an angle grinder, having a drive unit for driving an accessory tool, in particular a grinding and / or cutting disk, a switching unit for switching the drive unit, and an operating unit for operating the switching unit.

[0005] In particular, the handheld power tool can have a locking unit for locking an actuation of the actuating unit.

[0006] The present invention proposes that the locking unit can be unlocked as a function of an actuating force acting on the actuating unit.

[0007] To operate the operating unit, an operating force can be applied to the operating unit, which is designed to move the operating unit from a released state into an operated state. Typically, the operating force is applied perpendicularly to the operating surface of the operating unit. In particular, as long as the operating unit is loaded with the operating force and the locking unit is in the locked state, the operating unit can be locked.

[0008] Normally, the actuating unit can be locked or unlocked by means of the locking unit independently of the actuating force acting on the actuating unit.

[0009] Here, as long as the operating unit is loaded with an operating force and the locking unit has not been unlocked beforehand, it is possible to prevent the operating unit from being moved from the released state into the operated state. In particular, it is possible to prevent the locking unit from being adjusted or being adjustable from the locked state to the unlocked state when the operating unit is loaded with an operating force.

[0010] When an operating force is applied to the operating unit, the operating unit can be deflected outward, and in particular, deflected outward in such a way as to prevent the locking unit from being unlocked. This allows the handheld power tool to be held particularly advantageously by the operator. In particular, when an operating force is applied to the operating unit, the locking unit can be prevented from being moved from a locked state to an unlocked state.

[0011] This prevents an operator from accidentally operating the handheld power tool by gripping the operating unit, for example, to carry or hold the handheld power tool, without operating or wishing to operate the handheld power tool. Unintentional unlocking of the handheld power tool can thus be prevented by preventing the locking unit from unlocking when an operating force acts on the operating unit.

[0012] For example, when the locking unit is in the locked state, the operation of the operating unit is blocked. At this time, the locking unit may hit a stop that prevents the operating unit from being operated. Here, the locking unit can be moved from the locked state to the unlocked state.

[0013] “Unlockable as a function of an operating force acting on the operating unit” is to be understood in particular to mean that, for example, the operating unit is secured against unlocking of the locking unit when an operating force acts on the operating unit and can be unlocked by means of the locking unit when no operating force acts on the operating unit.

[0014] The handheld power tool can be configured as a portable handheld power tool. The handheld power tool can have a machine housing. The machine housing can be configured to enclose, in particular, internal components such as a drive unit, a switching unit, etc. The handheld power tool can be configured to movably support an operating unit on the machine housing.

[0015] The drive unit can be commutated mechanically, in particular by means of carbon brushes and current collectors, or electronically, in particular by means of semiconductor elements such as power transistors or thyristors. The drive unit can be designed as an electric motor.

[0016] The accessory tool can be designed as a grinding disc and / or a cutting disc. In principle, the accessory tool can be selected depending on the handheld power tool used, so that, for example, a saw disc or saw blade is used when a circular saw is used, and a drilling tool or chisel is used when a hammer drill is used. Of course, other accessory tools that appear appropriate to a person skilled in the art can also be used.

[0017] The switching unit comprises an on / off switch. The on / off switch is configured to switch the drive unit on and / or off. To this end, the switching unit comprises, in particular, a push button, which is preferably configured to release or prevent the flow of current to the drive motor. The switching unit can be configured such that, by actuating the operating unit and / or the switching unit, the energy supply to the drive unit can be enabled and / or interrupted. The switching unit can be designed as a mechanical, electrical and / or electronic switching unit. The switching unit can be arranged in an electrical circuit between an energy supply line (e.g., a cable) of the handheld power tool and a consumer (e.g., a drive unit configured as an electric motor), a plug for connection to a socket or a battery device being arranged on the cable.

[0018] The operating unit is configured to operate the switching unit in order to switch the drive motor on and / or off using the switching unit. The operating unit can be configured as an operating switch. The operating unit can be configured to operate a switching pawl, a switching button, and / or a switching lever. The operating unit can be configured to operate the switching unit indirectly or directly. In particular, the operating unit can be configured to contact the switching unit in such a way that the switching unit switches from an off state to an on state, and vice versa, if necessary. The operating unit can extend through the machine housing in order to operate the switching unit.

[0019] The locking unit can be configured to interact with the operating unit and, in particular, to limit or block the movement of the operating unit. The locking unit can be configured to limit, in particular, block the movement of the operating unit and / or the switching unit. In particular, the locking unit can be configured to block a change in state of the operating unit and / or the switching unit. For example, the locking unit can be used to prevent the operating unit from being switched from a released state to an operated state and / or the switching unit from being switched from an off state to an on state.

[0020] Further expedient developments of the handheld power tool according to the invention are described below.

[0021] What can meet the purpose is that the locking unit is movably, particularly rotatably supported in the release state when the operating unit is not subjected to load.The release state when the operating unit is not subjected to load should be understood as such a state in particular, in which no operating force acts or is applied to the operating unit. The locking unit can be supported translationally and / or rotatably relative to the operating unit in the release state when it is not subjected to load, so that for example the locking unit is placed in the unlocked state from the locked state. In the release state when it is not subjected to load, the operating unit can be spaced apart to the greatest extent relative to the machine housing of the handheld power tool. In the release state when it is not subjected to load, the operating unit can be further away from or away from compared to the release state and / or the operating state when it is subjected to load. Thus, the locking unit can be realized in a particularly simple manner.

[0022] Furthermore, it may be advantageous for the operating unit to be deflected from the released state in a loaded release state so as to prevent the locking unit from being manipulated from the locked state to the unlocked state. In particular, manipulation of the locking unit is prevented in a form-locking manner in both the loaded release state and the locked state of the operating unit. The loaded release state of the operating unit should particularly be understood as a state in which an operating force acts on or is applied to the operating unit. The locking unit may be preloaded in the loaded state of the operating unit, particularly between the operating unit and the machine housing of the handheld power tool. The locking unit may be configured to cooperate with the machine housing of the handheld power tool. The locking unit may be at least partially arranged between the operating unit and the machine housing. The locking unit may be spaced apart from the machine housing. The locking unit may be further spaced apart from the machine housing in the unloaded operating state of the operating unit than in the loaded released state. The locking unit may contact the machine housing in the loaded released state. In the unloaded released state, the locking unit may be spaced apart from the machine housing. The locking unit can be mounted movably relative to the machine housing. The locking unit can be arranged on the operating unit. The locking unit can be connected to the operating unit and, in particular, rotatably mounted relative to the operating unit. The locking unit can restrict the operating unit. This can particularly reliably protect the handheld power tool from unintentional manipulation. The locking unit can thus be placed in a particularly simple manner into a state in which unlocking of the locking unit is prevented.

[0023] The operating unit can be mounted so as to be movable from an unloaded, released state to a loaded, released state. The movement of the operating unit can be limited to a small travel segment. This travel segment can be a few millimeters or a certain angular deviation, along which the operating unit can move when the locking unit is locked. This travel segment can extend to a maximum of 1 cm, in particular a maximum of 0.8 cm, preferably a maximum of 0.5 cm, and particularly preferably 0.5 to 5 mm. The angular deviation about the operating axis of the operating unit can be up to 3°, in particular up to 1°, preferably up to 0.5°, and particularly preferably up to 0.25°. The movement of the operating unit can be limited by a stop of the locking unit.

[0024] Furthermore, it may be expedient for the handheld power tool to have a form-locking element that is configured to limit the movement of the locking unit, in particular the movement from the locked state to the unlocked state. The form-locking element may be integral or one-piece with the machine housing. The form-locking element may be configured as a raised portion. The form-locking element may form a stop that is configured to limit the movement of the locking unit. The form-locking element may also be configured as a recessed portion that is configured to at least partially receive the locking unit. This makes it possible to limit the movement of the locking unit in a particularly simple manner.

[0025] Furthermore, it can be expedient to arrange the form-locking element on the machine housing of the handheld power tool. The form-locking element can be provided to prevent the locking unit from moving from the locked state to the unlocked state. This makes it possible to provide the form-locking element in a particularly simple manner.

[0026] The present invention proposes that a locking unit is arranged on the operating unit. The locking unit can limit the movement of the operating unit. The locking unit can lock or prevent the operation of the switching unit by means of the operating unit. This can prevent unintentional operation of the handheld power tool in a particularly simple manner.

[0027] Furthermore, it is proposed that the locking unit has a spring element, which is configured to place the locking unit from the unlocked state into the locked state. The spring element can be configured as a helical torsion spring or a torsion spring. The locking unit can be prestressed in the unlocked state. The locking unit can be prestressed more strongly in the unlocked state than in the locked state. This ensures that the locking unit returns to its initial position or locked state as soon as the operating unit is placed in the released state. This makes it possible to reset the locking unit in a particularly simple manner.

[0028] Furthermore, it is proposed that the operating element be configured to operate a shift pawl. The operating element may have an elongated extension. The operating element may have a main extension that extends substantially along the main extension of the handheld power tool. The operating element may extend along the main extension of the handle region, in particular, by more than 40%, preferably more than 50%, advantageously more than 60%, particularly preferably more than 70%, further preferably more than 80%, and / or preferably less than 80%, advantageously less than 70%. The operating element may be movably, in particular rotatably, mounted relative to the machine housing. The operating element may be arranged on the machine housing. In the released state, the operating element may be arranged at an angle relative to the machine housing, in particular, to the handle axis. In the operated state, the operating element may be arranged parallel to the machine housing, in particular, to the handle axis. The operating element may have a fixed end connected to the machine housing and a release end facing away from the fixed end. The locking unit may be arranged between the fixed and release ends. The locking unit may be arranged approximately midway between the fixed and release ends. The locking unit, in particular, the locking element, may be arranged in the region of the release end. As a result, the operating element can be grasped and operated particularly easily by an operator of the handheld power tool.

[0029] The handle axis can extend along a main extension of the handheld power tool or a main extension of the handle region of the machine housing.

[0030] It may be expedient for the locking unit to include a locking element that is arranged on the fixing element and is rotatably mounted relative to the actuating element. The actuating element can be actuated by means of a substantially translational movement. The locking element can be actuated by means of a substantially translational movement that is transverse, in particular substantially perpendicular, to the actuation or actuation direction of the actuating element. This ensures that a single actuation or actuation direction is not sufficient for actuating the actuating unit, but rather two independent actuations or actuation directions are required.

[0031] Furthermore, it can be expedient if the locking element is mounted so as to be rotatable about a rotation axis, wherein the rotation axis is spaced further apart from the form-fitting element in the unloaded, released state of the actuating element than in the loaded, actuated state. This ensures that the actuating unit cannot be actuated unintentionally.

[0032] The present invention also relates to a method for locking the operation of a handheld power tool having an operating unit and a locking unit. The method comprises the following steps: applying an operating force to the operating unit; and actuating the locking unit from a locked state to a stop state with a form-fitting element. This ensures that the operating unit cannot be accidentally operated. In particular, the handheld power tool can be grasped and carried by an operator without operating the operating unit or placing it in an operating state.

[0033] Furthermore, it may be expedient if an operating unit / the operating unit is / are operable by means of an actuation about a handle axis or tangentially to the handle axis of the handheld power tool.

[0034] The operating unit can be configured as a slide switch, in particular, that can be displaced tangentially relative to the outer surface. The operating unit can be configured to move the handheld power tool or the switching unit by means of a displacement movement of the operating unit. The operating unit can extend parallel to the machine housing in a circumferential direction about the handle axis. The operating unit can be mounted so as to be pivotable or tangentially displaceable in a circumferential direction about the handle axis. The operating unit can extend through a machine housing recess in the machine housing.

[0035] By gripping the handle area and the operating unit with his hands, the operator can reliably move the operating unit from the release state into the operating state by rotating the hand or at least in sections by rotating a single hand section.

[0036] The machine housing of the handheld power tool may include a housing recess configured to receive an operating unit. The machine housing may, in particular, delimit the housing recess over 360° within a plane. The housing recess may be configured to movably support the operating unit. The housing recess may be configured to support the operating unit such that the operating unit extends from the interior, in particular the inner side, to the exterior, in particular the outer side, of the machine housing. The housing recess may have an extension in a circumferential direction about the handle axis that is, in particular, at least 70%, preferably at least 60%, advantageously at least 50%, and particularly preferably at least 40% smaller than the extension of the operating unit in a circumferential direction about the handle axis. This ensures that the operating unit is retained in or on the machine housing or the housing recess. In principle, the machine housing can overlap the operating unit in both the released and the operated state, thereby delimiting the housing recess. Preferably, the machine housing can overlap the operating unit in the released state, while not overlapping the operating unit on both sides in the operated state, thereby at least partially exposing the housing recess. The housing recess can extend along the operating unit. The housing recess can limit the movement of the operating unit, in particular in the circumferential direction around the handle axis.

[0037] The machine housing may include a guide unit configured to guide the operating unit along the machine housing, particularly in a circumferential direction about a handle axis. The guide unit may be configured as a guide groove. The guide groove may be configured to extend in a circumferential direction. The guide groove may be configured to receive and guide the operating unit in a circumferential direction. This allows the operating unit to operate the handheld power tool or the switching unit in a particularly simple manner.

[0038] It may be expedient for the operating unit to form a grip region. The operating unit may extend along the grip axis relative to the extent of the grip region, in particular by more than 40%, preferably more than 50%, advantageously more than 60%, particularly preferably more than 70%, further preferably more than 80%, and / or preferably less than 80%, advantageously less than 70%. The operating unit can be gripped by an operator as needed. The operating unit may have a grip region for manual gripping. This allows the operator to grip and operate the handheld power tool in a variety of gripping positions.

[0039] Furthermore, it can be expedient if the operating unit extends in the circumferential direction over an angle of at least 30°, in particular at least 40°, preferably at least 50°, advantageously at least 60° and / or at most 70°, in particular at most 80°, preferably at most 70°, further preferably at most 60° relative to the handle axis. This allows the operator to operate the handheld power tool in different holding positions, thereby enabling particularly flexible handling and operation of the handheld power tool.

[0040] Furthermore, it may be expedient if the operating unit extends along the handle axis relative to the handle area by more than 40%, preferably more than 50%, advantageously more than 60%, particularly preferably more than 70%, further preferably more than 80% and / or preferably less than 80%, advantageously less than 70%.

[0041] As a result, the handheld power tool can be operated particularly flexibly and reliably, since the operating unit can be operated along the entire extent.

[0042] Furthermore, it may be expedient for the operating unit to be operable in a counterclockwise and / or clockwise manner. "Counterclockwise" or "clockwise" is to be understood as a direction of rotation that preferably extends to the left or right about the handle axis, viewed in the direction from the handle area to the tool receiving area, along the handle axis. This allows for particularly simple operation of the handheld power tool.

[0043] The present invention proposes that the operating unit include a spring element, which is configured to return the operating element from an operated state to a released state. The spring element can be designed as a torsion spring or a helical torsion spring. The spring element can be designed as a tension-compression spring. Of course, other (spring) elements that appear appropriate to a person skilled in the art are also conceivable, which return the operating element to the released state. This allows for particularly reliable resetting of the operating unit, for example, so that the operating unit can be adjusted from an operated state to a released state.

[0044] Furthermore, it is proposed that the operating unit be configured such that the handheld power tool or the switching unit can be operated by means of a movement along the handle axis or in a circumferential direction around the handle axis. In particular, a second operating element can be provided that is coupled to the first operating element such that movement of the first operating element about the handle axis results in movement of the second operating element along the handle axis. The switching unit can be arranged below the first operating element. This allows for a particularly space-saving arrangement of the switching unit in the machine housing.

[0045] Furthermore, it is proposed that the operating unit comprises a first operating element and a second operating element movably mounted relative to the first operating element. The first operating element is configured to operate the second operating element. The second operating element is movably mounted substantially perpendicular to the operating direction of the first operating element. The first operating element may be pivotally mounted about a handle axis. The second operating element may be translationally mounted. The second operating element may be movably mounted along the handle axis. This allows for a particularly compact operating unit.

[0046] It may be expedient for the operating unit to include a guide unit configured to guide the second operating element relative to the first operating element. The guide unit may include a positive-locking element, in particular a positive-locking protrusion, which engages in another positive-locking element, in particular a housing recess. The guide unit may be configured to predetermine the relative movement of the second operating element relative to the first operating element. The positive-locking element, in particular the positive-locking protrusion, may be arranged on the first operating element. The positive-locking element, in particular the positive-locking recess, may be arranged on the second operating element. This allows for particularly reliable and compact operation of the switching unit.

[0047] Furthermore, it can be expedient if the first operating element is arranged parallel to the second operating element, thereby making it possible to construct a particularly compact operating unit.

[0048] Furthermore, it may be expedient for the operating unit to have an operating projection that projects in the radial direction. The operating projection may be designed to project relative to the machine housing. The operating projection may be designed to limit the movement of the operating unit in the circumferential direction. The operating unit may be designed to abut against the machine housing, which delimits the housing recess, when the operating unit is actuated.

[0049] Furthermore, it may be expedient for the operating unit to have a first operating element and a second operating element mounted movably relative to the first operating element. The first operating element may be provided for operating the second operating element. The second operating element may in turn be provided for operating a switching unit.

[0050] It may be expedient if the first operating element is arranged parallel to the second operating element. As a result, the operating unit can be designed to be particularly compact.

[0051] Furthermore, it may be expedient for the first operating element to be mounted so as to be translationally movable relative to the second operating element.

[0052] Furthermore, it may be expedient for a second operating element to be supported translationally relative to the first operating element for unlocking the operating unit and for actuating the switching unit. The second operating element may be configured to move the operating unit from a locked state to an unlocked state by means of a first translational movement and to switch the switching unit by means of a second translational movement. The first and second movements may be directed parallel to the operating unit, in particular parallel to the first and / or second operating elements. The first and second translational movements may be directed substantially along a main extension direction of the handheld power tool or along a grip axis of a grip region of the handheld power tool.

[0053] Furthermore, it may be expedient for the first operating element to be configured to operate the second operating element, in particular by means of an additional translational movement, by reducing the distance between the first operating element and the second operating element. The additional translational movement may be oriented transversely, in particular substantially perpendicularly, to the first and / or second translational movement. The additional translational movement may be oriented substantially perpendicularly to the main extension direction of the handheld power tool or radially to a handle axis of a handle region of the handheld power tool.

[0054] Furthermore, the invention proposes that the operating unit forms a grip region. In particular, the operating unit can preferably be gripped with the operator's entire hand.

[0055] It is further proposed that the operating unit include a guide unit, which is configured to guide the second operating element relative to the first operating element. The guide unit can include a form-locking element, in particular a form-locking protrusion, which engages in another form-locking element, in particular a housing recess. The guide unit can be configured to predetermine the relative movement of the second operating element relative to the first operating element. The form-locking element, in particular the form-locking protrusion, can be arranged on the first operating element. The form-locking element, in particular the housing recess, can be arranged on the second operating element. The first operating element has a sliding surface, which is configured to transmit the movement of the second operating element to the first operating element. This ensures that the operating unit functions simply and safely.

[0056] Furthermore, it is proposed that the handheld power tool has a locking unit which is provided to lock the actuating unit in a locked state and to release it in an unlocked state.

[0057] It may be expedient for the locking unit to be configured to adjust the operating unit and, in particular, to be adjustable such that the operating unit can be actuated. The locking unit may be configured to adjust or displace the second operating element relative to the first operating element. The locking unit may be arranged on the first operating element. The locking unit may be rotatably mounted on the operating element. The locking unit may be configured to translate the second operating element relative to the first operating element by means of a rotational movement of the locking unit.

[0058] Furthermore, it may be expedient if the locking unit is rotatably mounted. The locking unit may be arranged on the first actuating element.

[0059] Furthermore, it can be expedient for the locking unit to be configured to adjust the second operating element relative to the first operating element, in order in particular to release the operation of the operating unit. The locking unit can be configured to move the first operating element relative to the second operating element and to release the relative movement of the first operating element relative to the second operating element.

[0060] Furthermore, it may be expedient for the operating unit to include a sliding element, which is configured for operating the switching unit by means of the operating unit. The sliding element may be configured as a sliding projection or a sliding notch. The sliding element may be arranged in or on the first and / or second operating element. The sliding element may include an inclined surface, which is configured to predetermine, in particular force-lockingly predetermine, the movement of the operating unit, in particular the second operating element. The operating unit may include multiple sliding elements. The second operating element may be configured as an operating dial. The operating dial may include a sliding notch. This allows for a particularly compact operating unit.

[0061] The invention proposes that the operating unit has a rolling element which is provided for operating the switching unit by means of the operating unit. This allows for particularly reliable and simple operation of the operating unit.

[0062] The invention proposes that the operating unit is provided for operating the switching unit by means of deformation of the operating unit. The operating unit is at least partially deformable.

[0063] The operating unit is arranged in a housing recess / the housing recess of the machine housing. The operating unit can be configured to cover the housing recess. The operating unit can be configured to directly operate the switching unit.

[0064] By means of such an actuating unit, deformations of the actuating unit can be transmitted, so that, for example, a deformation at one end of the actuating unit along the handle axis leads to a deformation at the end of the actuating unit facing away from the end. This allows the operator to operate the actuating unit particularly flexibly, since the deformation is transmitted over the entire length of the actuating unit.

[0065] It may be expedient if the operating unit has an operating element which is provided for operating the switching unit by means of an elastic deformation of the operating element, in particular an elastic deformation, which may be provided for transmitting a movement to the switching unit in order to operate the switching unit.

[0066] Furthermore, it may be expedient if the operating unit has at least three or at least four operating elements which are provided for operating the switching unit by means of an, in particular elastic, deformation of the operating unit.

[0067] Furthermore, it may be expedient for the at least three or at least four actuating elements to be arranged parallel to one another and to be coupled to one another.

[0068] Furthermore, it can be expedient if the operating unit extends along the handle axis relative to the extension of the handle area, in particular by more than 40%, preferably by more than 50%, advantageously by more than 60%, particularly preferably by more than 70%, further preferably by more than 80% and / or preferably by less than 80%, advantageously by less than 70%.

[0069] The invention proposes that the actuating element be of elongated, in particular essentially rod-shaped, design.

[0070] Furthermore, it is proposed that the actuating unit has a form-locking element, in particular a form-locking protrusion, and is configured to cooperate with a form-locking element corresponding to the form-locking element, in particular a form-locking recess. The form-locking element can be designed as a form-locking protrusion, which is circular. The form-locking element can be designed as a pin. The corresponding form-locking element can be designed as a form-locking recess. The form-locking recess can have a cross-section in the form of an elongated hole or an ellipse. The form-locking recess can be designed as an insertion recess.

[0071] Furthermore, it is proposed that the actuating elements are mounted so as to be movable relative to one another.

[0072] It may be expedient for the actuating element to have a toothing which couples the movement of the actuating element.

[0073] Furthermore, it may be expedient if the handheld power tool has a locking unit which is provided to block an actuation of the actuating unit in a locked state and to release an actuation of the actuating unit in an unlocked state. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Further advantages are apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain features that are combined in many ways. A person skilled in the art can also expediently consider these features individually and combine them into other meaningful combinations. Here, the following is shown:

[0075] Figure 1 A three-dimensional view of a handheld machine tool,

[0076] Figures 2 to 3 A view showing the operating unit,

[0077] Figures 4 to 6 The figures each show an embodiment of an operating unit,

[0078] Figures 7 to 9 each showing a further embodiment of the operating unit,

[0079] Figure 10 Cross-section of the control unit,

[0080] Figures 11 to 13 each showing a further embodiment of the operating unit,

[0081] Figure 14 A view of another embodiment of the operating unit, and

[0082] Figures 15 to 18 The figures each show a further embodiment of the operating unit.

[0083] In the following figures, identical components are provided with the same reference numerals. DETAILED DESCRIPTION

[0084] The drawing shows a handheld power tool 11 designed as an angle grinder. The handheld power tool 11 is designed to be portable and has a machine housing 13 which is provided to enclose internal components such as a drive unit 15 , a switching unit 17 and the like.

[0085] The handheld power tool 11 has a drive unit 15 for driving an accessory tool in the form of a grinding and / or cutting disk. The drive unit 15 can be commutated mechanically, in particular using carbon brushes and current collectors, or electronically, in particular using semiconductor components such as power transistors or thyristors. The drive unit 15 can be in the form of an electric motor. In this case, the drive unit 15 is in the form of an electric motor. To control the drive unit 15, the handheld power tool 11 has an electronics unit 19, which is particularly useful in electric motors.

[0086] The accessory tool can be designed as a grinding disc and / or a cutting disc. In principle, the accessory tool can be selected depending on the handheld power tool 11 used, so that, for example, a saw disc or saw blade is used when a circular saw is used, and a drilling tool or chisel is used when a hammer drill is used. Of course, other accessory tools that appear appropriate to a person skilled in the art and are suitable for the handheld power tool 11 can also be used.

[0087] The handheld power tool 11 includes a switching unit 17 for switching the drive unit 15. The switching unit 17 includes an on / off switch configured to switch the drive unit 15 on and / or off. For this purpose, the switching unit 17 includes, for example, a button that is preferably configured to enable or block the flow of current to the electric motor. The switching unit 17 is configured to enable or disable the energy supply to the drive unit 15 by actuating the switching unit 17 via an operating unit 21. The switching unit 17 can be configured as a mechanical and / or electrical switching unit 17. The switching unit 17 is arranged in a circuit between a power supply line (e.g., a cable having a plug for connecting to a socket or a battery device) of the handheld power tool 11 and a consumer (e.g., the drive unit 15 configured as an electric motor).

[0088] The handheld power tool 11 has an operating unit 21 for operating the switching unit 17. The handheld power tool 11 is configured to movably support the operating unit 21 on the machine housing 13. The operating unit 21 is configured to operate the switching unit 17 in order to switch the electric motor on and / or off by means of the switching unit 17. The operating unit 21 can be designed to operate a switching pawl ( Figures 1 to 3 ), manipulate the slider( Figures 4 to 10 ) or operate the switch button ( Figures 11 to 18 The operating unit 21 is provided for directly operating the switching unit 17 and contacts the switching unit 17 in such a way that the switching unit 17 switches from the off state to the on state, and vice versa if necessary. The operating unit 21 preferably extends through the machine housing 13 in order to operate the switching unit 17. In at least one operating state, the operating unit 21 is arranged in a housing recess 61 of the machine housing 13.

[0089] The operating unit 21 has an operating surface 27 . The operating surface 27 is provided to be touched by an operator and to be acted upon by an operating force 29 in order to operate the operating unit 21 . The operating unit 21 has at least one first operating element 23 , 25 .

[0090] The handheld power tool 11 may include a locking unit 31 for locking the operation of the operating unit 21. The locking unit 31 can be unlocked according to the operating force 29 acting on the operating unit 21 ( Figure 3 ).

[0091] To operate the operating unit 21, the first operating element 23, 25 applies an operating force 29 to the first operating element 23, 25 of the operating unit 21, which is provided to move the first operating element 23, 25 of the operating unit 21 from the released state to the operated state. Typically, the operating force 29 is applied perpendicularly to the operating surface 27 of the first operating element 23, 25 of the operating unit 21. As long as the first operating element 23, 25 of the operating unit 21 is acted upon by the operating force 29 and the locking unit 31 is in the locked state, the operating unit 21 is locked.

[0092] In this case, the operating unit 21 is prevented from being moved from the released state to the operated state as long as the first operating elements 23, 25 of the operating unit 21 are acted upon by the operating force 29 and the locking unit 31 has not previously been unlocked. In particular, this prevents the locking unit 31 from being adjusted or capable of being adjusted from the locked state to the unlocked state when the first operating elements 23, 25 of the operating unit 21 are acted upon by the operating force 29.

[0093] When the first operating elements 23, 25 of the operating unit 21 are acted upon by an operating force 29, the first operating elements 23, 25 of the operating unit 21 are deflected such that unlocking of the locking unit 31 is prevented. In particular, when the first operating elements 23, 25 of the operating unit 21 are acted upon by an operating force 29, the locking unit 31 is prevented from being moved from the locked state to the unlocked state.

[0094] Inadvertent unlocking of the handheld power tool 11 can thereby be prevented by preventing the locking unit 31 from being unlocked when the actuating force 29 acts on the actuating unit 21 .

[0095] The locking unit 31 is configured to interact with the operating unit 21 and, in particular, to limit or lock the movement of the first operating elements 23, 25 of the operating unit 21. This prevents the switching unit 17 from being switched on or off. The locking unit 31 is configured to prevent the movement of the first operating elements 23, 25 of the operating unit 21 for switching the switching unit 17 on. The locking unit 31 is configured to lock state changes of the operating unit 21 and the switching unit 17. For example, the locking unit 31 can prevent the operating unit 21 from being switched from a released state to an operated state and prevent the switching unit 17 from being switched from an off state to an on state.

[0096] The locking unit 31 has a locking element 33, which is movably supported relative to the operating unit 21 and / or the machine housing 13 of the handheld power tool 11. Here, the locking element 33 can be configured to be moved from a locked state to an unlocked state. The locking element 33 is configured to collide with a stop element 35, which prevents the operating unit 21 from being operated. The stop element 35 is located on the side opposite the locking element 33. The stop element 35 is arranged on the machine housing 13. The stop element 35 can be configured as a stop surface 37. The locking element 33 has a locking surface 39, which is configured to contact the stop surface 37 when the locking element 33 is in the locked state.

[0097] The locking element 33 is arranged on the operating unit 21 and is configured to limit the movement of the operating unit 21. The locking element 33 blocks the operation of the switching unit 17 by blocking the operation of the first operating element 23. The locking element 33 is arranged on the first operating element 23 and is rotatably supported relative to the first operating element 23. The locking element 33 is connected to the first operating element 23. The locking element 33 is rotatably supported about an axis of rotation dA. The axis of rotation dA passes through the first operating elements 23, 25 and intersects them. The locking element 33 is arranged in a locking groove 41 of the first operating elements 23, 25. The locking element 33 extends from one side of the first operating element 23 to a side facing away from the side. The locking element 33 has two locking arms 43, 45, which are respectively arranged on the side of the first operating element 23 facing away from each other. The locking element 33 is mounted rotatably about an axis of rotation dA, wherein the axis of rotation dA is spaced further apart relative to the raised portion 51 in the unloaded, released state of the actuating element 23 than in the loaded, actuated state.

[0098] The locking element 33 is mounted so as to be rotatable in the unloaded, released state of the actuating unit 21. In this unloaded, released state, the locking element 33 is rotatable or rotatably mounted relative to the actuating unit 21 in order to move the locking element 31 from the locked state to the unlocked state. In this unloaded, released state, the actuating unit 21 is spaced maximally apart from the machine housing 13, or further away than in the loaded, released or actuated state. The locking element 33 is spaced apart from the machine housing 13 in this unloaded, released state. The locking element 33, in particular the locking surface 39, is configured to contact the machine housing 13, in particular the stop surface 37, in the loaded, released state.

[0099] In the loaded, released state, the first operating element 23 is deflected out of the released state such that actuation of the locking element 33 from the locked state to the unlocked state is prevented. In the loaded, released state of the operating unit 21 and in the locked state of the locking unit 31, actuation of the locking element 33 is positively locked. In the loaded state of the operating unit 21, the locking element 33 is preloaded between the first operating element 23 and the machine housing 13. The locking element 33, in particular the locking surface 39, is configured to interact with the machine housing 13, in particular the stop surface 37. The locking element 33 is at least partially arranged between the first operating element 23 and the machine housing 13. The locking element 33 is spaced apart from the machine housing 13. In the unloaded, actuated state of the first operating element 23, the locking element 33 is further spaced apart from the machine housing 13 than in the loaded, released state. The locking element 33 contacts the machine housing 13 in the loaded, released state. In the unloaded, released state, the locking element 33 is spaced apart from the machine housing 13. The locking element 33 is mounted so as to be movable relative to the machine housing 13 .

[0100] The first actuating element 23 is mounted so as to be movable from an unloaded, released state to a loaded, released state in the locked state of the locking element 33. The movement of the first actuating element 23 is limited by the locking unit 31 by means of the locking element 33 (particularly the locking surface 39) abutting against the stop element 35 (particularly the stop surface 37).

[0101] The handheld power tool 11 includes a positive locking element 51, which is configured as a raised portion 51 and is provided to limit the movement of the locking element 33 of the locking unit 31 from the locked state to the unlocked state. The positive locking element 51 is arranged on the machine housing 13 and is integrally or integrally formed therewith. The raised portion 51 forms a further stop, which is configured to limit the movement, in particular the rotational movement, of the locking element 33. The raised portion 51 is configured to limit the movement of the locking element 33 from the locked state to the unlocked state. The raised portion 51 can be configured to prevent or at least hinder the movement of the locking element 33. The raised portion 51 is configured such that it can be overcome by the locking element 33 by releasing the actuating force 29 of the first actuating element 23 to reset the first actuating element 23 and thereby placing the locking element 33 into the unlocked state.

[0102] The raised portion 51 is arranged between the stop element 35 (in particular the stop surface 37 of the stop element 35) and the locking element 33 (in particular the locking surface 39 of the locking element 33) and / or the first actuating element 23. The raised portion 51 has a profiled surface 53, which is arranged transversely, in particular perpendicularly, to the stop surface 37. The raised portion 51 adjoins the stop element 35 laterally.

[0103] Alternatively or additionally, the form-locking element 51 can be designed as a shaped recess which is provided to at least partially receive the locking element 33. The locking element 33 is mounted rotatably about an axis of rotation dA, wherein the axis of rotation dA is spaced further apart relative to the shaped elevation 51 in the unloaded, released state of the actuating element 23 than in the loaded, actuated state.

[0104] The locking unit 31 includes a spring element (not shown) configured as a helical torsion spring element, which is configured to displace or return the locking element 33 from the unlocked state to the locked state. Of course, other elements deemed appropriate by a person skilled in the art can also be used as the spring element, which return the locking element 33 to its initial state. The locking element 33 is prestressed in the unlocked state. The locking element 33 is prestressed more strongly in the unlocked state than in the locked state.

[0105] The first operating element 23 is configured to operate a shift pawl and has an elongated extension. The first operating element 23 has a main extension 9 that extends substantially along the main extension 9 of the handheld power tool 11. The first operating element 23 extends over more than 60% of the main extension 9 of the handle region. The first operating element 23 is arranged on the machine housing 13 and is mounted so as to be rotatable relative to the machine housing 13 about an operating axis. The operating axis is arranged transversely, in particular substantially perpendicularly, to the main extension 9 of the handheld power tool 11.

[0106] In the released state, the first operating element 23 is arranged at an angle to the handle axis hA relative to the machine housing 13. In the operated state, the first operating element 23 is arranged substantially parallel to the handle axis hA relative to the machine housing 13. The first operating element 23 has a fixed end connected to the machine housing 13 and a release end facing away from the fixed end, with the locking element 33 arranged between the fixed and release ends. The locking unit 31 is arranged approximately midway between the fixed and release ends. The locking element 33 is arranged in the region of the release end.

[0107] The handle axis hA can extend along a main extension 9 of the handle region of the handheld power tool 11 or of the machine housing 13 .

[0108] The locking element 33 is arranged on the first operating element 23 and is rotatably mounted relative to the operating element 23. The first operating element 23 can be actuated by means of a substantially translational movement, which extends in particular radially relative to the handle axis hA. The locking element 33 can be actuated by means of a substantially translational movement which is transverse to, in particular substantially perpendicular to, the actuation or actuation direction of the first operating element 23.

[0109] exist Figures 4 to 10 In the embodiment, the operating unit 21, in particular the first operating element 23, can be operated by means of an operation about the handle axis hA or tangentially to the handle axis hA of the handheld power tool 11. Here, an operating force 29 is applied to the first operating element 23 in a circumferential direction about the handle axis hA in order to place the operating unit 21 in the operated state.

[0110] The first operating element 23 is designed as a slide switch and is provided for moving the handheld power tool 11 or the switching unit 17 by means of a sliding movement of the first operating element 23. The first operating element 23 extends parallel to the machine housing 13 in a circumferential direction about the handle axis hA. The first operating element 23 is mounted so as to be pivotable in a circumferential direction about the handle axis hA.

[0111] The machine housing 13 of the handheld power tool 11 has a housing recess 61 configured to receive the operating unit 21. The machine housing 13 delimits the housing recess 61 over 360° in a plane. The housing recess 61 is configured to movably support the first operating element 23 and supports it in such a manner that the first operating element 23 extends from the inside to the outside of the machine housing 13. The first operating element 23 is arranged in the housing recess 61 in the machine housing 13 and extends through the housing recess 61. The housing recess 61 has an extension in the circumferential direction about the handle axis hA that is at least 40% smaller than the extension of the first operating element 23 in the circumferential direction about the handle axis hA. The housing recess 61 extends along the first operating element 23. The housing recess 61 limits the movement of the first operating element 23 in the circumferential direction about the handle axis hA.

[0112] The machine housing 13 has a guide unit 63 that is configured to guide the operating unit 21 along the machine housing 13 in a circumferential direction about the handle axis hA. The guide unit 63 is configured as a guide groove 65 and is configured to extend in the circumferential direction. The guide groove 65 is configured to receive and guide the operating unit 21 in the circumferential direction.

[0113] The first operating element 23 forms a handle area and extends at least 70% along the handle axis hA relative to the extension of the handle area. The first operating element 23 should be grasped by the operator when necessary. The first operating element 23 has a holding area for grasping by hand.

[0114] The first actuating element 23 extends in the circumferential direction over an angular range of at least 45° relative to the handle axis hA.

[0115] The first operating element 23 can be actuated in a counterclockwise and / or clockwise manner.

[0116] The actuating unit 21 includes a spring element (not shown) that is provided to return the first actuating element 23 from the actuated state to the released state. The spring element is designed as a tension-compression spring. Of course, other (spring) elements that appear appropriate to a person skilled in the art are also conceivable and that return the actuating element 23 to the released state.

[0117] The first operating element 23 is designed such that the handheld power tool 11 or the switching unit 17 can be operated by means of a movement along the handle axis hA or in a circumferential direction about the handle axis hA.

[0118] The operating unit 21 has a first operating element 23 and a second operating element 25 mounted movably relative to the first operating element 23, wherein the first operating element 23 is provided for operating the second operating element 25. The second operating element 25 is covered by the first operating element 23. The second operating element 25 is provided for operating the switching unit 17 by means of a movement of the first operating element 23.

[0119] The second operating element 25 is coupled to the first operating element 23 in such a way that a movement of the first operating element 23 about the handle axis hA results in a movement of the second operating element 25 along the handle axis hA ( Figures 8 to 9 The switching unit 17 is arranged below the first operating element 23. The second operating element 25 is supported so as to be movable substantially perpendicular to the operating direction of the first operating element 23. The first operating element 23 is supported so as to be pivotable about the handle axis hA. The second operating element 25 is supported so as to be translationally movable. The second operating element 25 is supported so as to be movable along the handle axis hA. The first operating element 23 is arranged parallel to the second operating element 25.

[0120] The operating unit 21 includes a guide unit 63, which is configured to guide the second operating element 25 relative to the first operating element 23. The guide unit 63 includes a positive-locking element 51, which is configured as a positive-locking protrusion 65 and engages with another positive-locking element 51, which is configured as a positive-locking recess 67. The guide unit 63 is configured to predetermine the relative movement of the second operating element 25 relative to the first operating element 23. The positive-locking protrusion 65 is arranged on the second operating element 25. The positive-locking recess 67 is arranged on the first operating element 23. The positive-locking recess 67 can be configured so that the operating unit 21 can be actuated in both directions, that is, in a counterclockwise and counterclockwise direction, to actuate the switching unit 17. For example, the positive-locking recess 67 can be configured in the shape of an arrow. The positive-locking recess 67 receives the positive-locking protrusion 65 and guides it along the positive-locking recess 67. The arrow-shaped positive locking recess 67 has an arrow tip section and two arrow arm sections extending outward from the arrow tip section. The arrow arm sections are arranged adjacent to the arrow tip section. In the released state or the rest state of the actuating unit 21, the positive locking protrusion 65 is arranged in the arrow tip section of the positive locking recess 67 ( Figure 8 In the actuated state, the positive locking projection 65 is arranged in one of the arrow arm sections of the positive locking recess 67 ( Figure 9 ). Of course, other form-locking recesses 67 that appear sensible to a person skilled in the art can also be provided, which, for example, enable the first actuating element 23 to be actuated in a left-handed or right-handed manner.

[0121] The first operating element 23 has an operating projection 71 extending along the entire length of the operating element 23 and projecting in the radial direction. The operating projection 71 is provided to project relative to the machine housing 13 and to limit the movement of the first operating element 23 in the circumferential direction by virtue of the operating projection 71 of the operating element 23 being provided to abut against the machine housing 13 delimiting the housing recess 61 when the operating unit 21 is actuated or moved.

[0122] exist Figure 10 , a cross section of the actuating unit 21 is shown, in which, for example, the second actuating element 25 is not required. Here, a switching unit 17 or a switching element is arranged on each side, each of which can be actuated when the first actuating element 23 is moved in a circumferential direction about the handle axis hA. The first actuating element 23 is provided for direct contact with the switching unit 17.

[0123] exist Figures 11 to 14, the operating unit 21 includes a first operating element 23 and a second operating element 25 movably mounted relative to the first operating element 23. The first operating element 23 is configured as a button that is provided for operating the first operating element 23 in a direction perpendicular to the handle axis hA. The first operating element 23 is provided for operating the second operating element 25, and the second operating element 25 is in turn provided for operating the switching unit 17. The first operating element 23 is arranged parallel to the second operating element 25 and is supported so as to be movably translated.

[0124] The second operating element 25 is mounted so as to be movable translationally relative to the first operating element 23, essentially parallel to the handle axis hA, for unlocking the operating unit 21 and for actuating the switching unit 17. The second operating element 25 is provided for moving the operating unit 21 from a locked state to an unlocked state by means of a first translational movement and for switching the switching unit 17 by means of a second translational movement. The first and second translational movements are oriented essentially parallel to the first and second operating elements 23, 25. The first and second translational movements are oriented essentially along the main extension direction 9 of the handheld power tool 11, or along the handle axis hA of the handle region of the handheld power tool 11.

[0125] The first operating element 23 is configured to operate the second operating element 25 by means of a further translational movement, by reducing the distance between the first operating element 23 and the second operating element 25. The further translational movement is oriented substantially perpendicularly to the first and / or second translational movement. The further translational movement is oriented substantially perpendicularly to the main extension direction of the handheld power tool 11 or radially to the handle axis hA of the handle region of the handheld power tool 11.

[0126] The first operating element 23 forms a handle area. The first operating element 23 can be grasped by the operator's hand.

[0127] The actuating unit 21 has a guide unit 63, which is provided for guiding the second actuating element 25 relative to the first actuating element 23. The guide unit 63 has a form-locking element 51 designed as a form-locking protrusion, which engages in another form-locking element 51 designed as a form-locking recess 67 ( Figure 11 The guide unit 63 is provided for predefining a relative movement of the second operating element 25 relative to the first operating element 23. A positive-locking projection 65 is arranged on the first operating element 23. A positive-locking recess 67 is arranged on the second operating element 25. The first operating element 23 has sliding elements 81, 83, which are particularly designed as sliding surfaces and are provided for transmitting the movement of the second operating element 25 to the first operating element 23.

[0128] The locking element 33 is provided for adjusting the first operating element 23 in such a way that the operating unit 21 can be operated. The locking element 33 is provided for adjusting or displacing the second operating element 25 relative to the first operating element 23 by means of a lever action of the locking element 33. The locking element 33 is rotatably mounted and arranged on the first operating element 23. The locking element 33 is provided for adjusting the second operating element 25 relative to the first operating element 23 in a translational manner, essentially parallel to the handle axis hA, by means of a rotational movement of the locking element 33.

[0129] The locking element 33 is provided for adjusting the second operating element 25 relative to the first operating element 23 in order to release the operation of the operating unit 21. The locking element 33 is provided for moving the first operating element 23 relative to the second operating element 25 and releasing the relative movement of the first operating element 23 relative to the second operating element 25.

[0130] The first operating element 23 and the second operating element 25 each have a sliding element 81, 83, which is provided for operating the switching unit 17 by means of the second operating element 25. The sliding element 81 is designed as a sliding projection ( Figures 11 to 13 ) or sliding notch 83 ( Figure 14 ). A sliding projection 81 is arranged in or on the first operating element 23. A sliding notch 83 corresponding to the sliding projection 81 is arranged in or on the second operating element 25. At least the sliding projection 81 has an inclined surface that is provided for non-positively presetting the movement of the second operating element 25. The operating unit 21 has three sliding elements 81 on the first operating element 23 and additional sliding elements 83 on the second operating element 25 that correspond to the sliding elements 81 of the first operating element 23.

[0131] The second operating element 25 is configured as an operating dial ( Figure 14 ). The operating plate has a sliding slot 83.

[0132] exist Figure 14 Three first operating elements 23 are provided in the handheld power tool 11, which are designed as operating knobs and can be operated individually. The first operating element 23 can be pressed into the handheld power tool 11 and, by means of the pressing movement, moves the second operating element 25. The first operating element 23 is configured to adjust the second operating element 25 by means of a translation movement substantially perpendicular to the first operating element 23.

[0133] exist Figure 14In the embodiment, the first operating element 23 has a rolling element 87, which is provided for operating the switching unit 17 by means of the second operating element 25. The second operating element 25 is configured as an operating disk and has a plurality of sliding recesses with a shape matching the rolling element 87 for rolling the rolling element 87.

[0134] In accordance with Figures 15 to 18 In a further development of , the operating unit 21 can be provided for operating the switching unit 17 by means of a deformation of the operating unit 21. In this case, the operating unit 21 is at least partially deformable.

[0135] The operating unit 21 is arranged in a housing recess 61 of the machine housing 13 and is provided to cover the housing recess 61. The operating unit 21 is provided for directly operating the switching unit 17.

[0136] The operating unit 21 has a first operating element 23 which is provided for operating the switching unit 17 by means of elastic deformation of the operating elements 23 , 25 . The elastic deformation is provided for transmitting a movement to the switching unit 17 in order to operate it.

[0137] The operating unit 21 has three operating elements 23 , 25 , which are provided for operating the switching unit 17 by means of elastic deformation of the operating unit 21 .

[0138] The three operating elements 23, 25 are arranged parallel to one another and are coupled to one another. The first operating element 23 extends along the handle axis hA by more than 60% relative to the extent of the handle region.

[0139] Each actuating element 23 , 25 is of elongated and essentially rod-shaped design.

[0140] The actuating unit 21 has a form-locking element 51 designed as a positive-locking protrusion 65, which is provided for interaction with a corresponding form-locking element 51 designed as a positive-locking recess 67. The form-locking element 51 is designed as a positive-locking protrusion 65, which is circular. The positive-locking protrusion 65 can be pin-shaped. The corresponding positive-locking recess 67 has a cross-section in the form of an elongated hole or an ellipse. The positive-locking recess 67 is designed as an insertion recess.

[0141] The operating elements 23 , 25 are mounted so as to be movable relative to one another. The operating elements 23 , 25 have toothings that couple the movement of the operating elements 23 , 25 .

[0142] The handheld power tool 11 has a locking unit 31 which is provided to block an actuation of the actuating unit 21 in a locked state and to release the actuation of the actuating unit 21 in an unlocked state.

Claims

1. A handheld power tool comprising: a drive unit (15) for driving an accessory tool, a switching unit (17) for switching the drive unit (15), an operating unit (21) for operating the switching unit (17), and a locking unit (31) for locking the operating unit (21), wherein: The locking unit (31) can be unlocked according to an operating force acting on the operating unit (21), wherein the operating unit (21) has a first operating element (23) and a second operating element (25) supported movably relative to the first operating element (23), and wherein the locking unit (31) has a locking element (33) which is configured to adjust the first operating element (23) so that the operating unit (21) can be operated, characterized in that the locking element (33) is configured to move the second operating element (25) relative to the first operating element (23) by means of a lever action of the locking element (33).

2. The handheld power tool according to claim 1, wherein: The second operating element (25) is mounted so as to be movable relative to the first operating element (23) in a translationally movable manner substantially parallel to the handle axis (hA) for unlocking the operating unit (21) and for actuating the switching unit (17).

3. The handheld power tool according to claim 1 or 2, characterized in that The actuating unit (21) has a guide unit (63) which is provided for guiding the second actuating element (25) relative to the first actuating element (23).

4. The handheld power tool according to claim 1 or 2, characterized in that The locking element (33) is rotatably mounted and arranged on the first actuating element (23).

5. The handheld power tool according to claim 1 or 2, characterized in that The first operating element (23) and the second operating element (25) each have a sliding element (81, 83) which is provided for operating the switching unit (17) by means of the second operating element (25).

6. The handheld power tool according to claim 5, characterized in that The sliding elements (81, 83) are configured as sliding projections or sliding grooves.

7. The handheld power tool according to any one of claims 1, 2 and 6, characterized in that The first operating element (23) has a rolling element (87) which is provided for actuating the switching unit (17) by means of the second operating element (25).

8. The handheld power tool according to claim 1 or 2, characterized in that The handheld power tool is an angle grinder.

9. The handheld power tool according to claim 1 or 2, characterized in that The accessory tool is a grinding disc and / or a cutting disc.

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