EP2705415B1 - Machine tool switch device - Google Patents

Description

State of the art

There are already machine tool switching devices, in particular for portable machine tools, known which comprises a switching unit which has a movably mounted operating element for actuating a mechanical, electrical and / or electronic switching element, and which comprises a blocking device for blocking a movement of the operating element, which has a movably mounted Release element, which is intended to lift the blocking of the operating element.

US 3847233 A discloses a machine tool switching device according to the preamble of claim 1.

Disclosure of the invention

The invention relates to a machine tool switching device, in particular for portable machine tools, having at least one switching unit which has at least one movably mounted operating element for actuating a mechanical, electrical and / or electronic switching element, and having at least one blocking device for blocking at least one movement of the operating element, the at least one movably mounted release element, which is intended to lift the blocking of the operating element. It is proposed that the release element is mounted translationally movable. A "portable machine tool" is to be understood here in particular as meaning a machine tool, in particular a hand tool machine, which can be transported without transport machine by an operator. In particular, the portable power tool has a mass that less than 40 kg, preferably less than 20 kg, and more preferably less than 10 kg. The term "switching unit" is intended to define in particular a unit which is provided to change a state of a switching unit superordinate unit as a result of actuation of at least the operating element. Particularly preferably, the switching unit is provided to enable and / or interrupt energy supply to a motor unit as a result of an actuation of the operating element, which acts on the switching element of the switching unit designed as a mechanical, electrical and / or electronic switch and / or pushbutton. Preferably, the designed as a mechanical, electrical and / or electronic switch and / or switch switching element is in a circuit between a power supply line, such as a cable to which a plug is arranged for connection to a power outlet, and a consumer, such as a Electric motor formed motor unit, the portable power tool arranged. In this context, the term "provided" is intended to define specifically equipped and / or specially designed.

The term "movably mounted" is intended here to define in particular a mounting of an element, wherein the element, in particular decoupled from an elastic deformation of the element, a movement possibility along at least a distance greater than 1 mm, preferably greater than 5 mm and particularly preferably greater than 10 mm and / or has a possibility of movement about at least one axis by an angle greater than 5 °, preferably greater than 10 ° and particularly preferably greater than 20 °. A "blocking device" is to be understood here in particular as a device which is provided, as far as possible, at least in one operating state, a movement of a movably mounted component along at least one path and / or around at least one axis by means of a mechanical, electrical and / or electronic barrier to prevent. Preferably, the locking device is provided to prevent at least in an operating state of the locking device by means of a mechanical lock movement of the movably mounted control element as far as possible. However, it is also conceivable that the locking device at least in an operating state of the locking device by means of an electromagnetic force and / or a permanent magnetic force, such as by means of movable magnets on the control largely prevents movement of the control element. By means of the embodiment of the machine tool switching device according to the invention can advantageously be achieved a convenient to use locking device. The locking device can be advantageously arranged space-saving on the control.

Furthermore, it is proposed that the release element is mounted translationally movable on the operating element. By means of the arrangement of the release element on the control element can advantageously be achieved a comfortable operation of the release element. An operator can, for example, by means of a finger of a hand of the operator operate the release element when gripping the operating element, so as to lift a blockage of a movement of the operating element.

It is also proposed that the release element is at least partially disposed in a recess of the operating element. A "recess" is to be understood here in particular a region of the operating element, which in comparison to adjacent areas, in particular compared to directly adjacent areas, has a lower material thickness, in particular a material thickness of 0 mm. Particularly preferably, the recess bordering edge regions are provided to guide the release element. Preferably, the release element arranged in the recess extends over at least a portion of the release element along a direction extending at least substantially perpendicular to an operating surface of the operating element over the operating surface of the operating element. The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle a maximum deviation of, in particular, less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. However, it is also conceivable that the release element terminates in an alternative embodiment along the direction perpendicular to the operating surface extending direction at least substantially flush with the control surface. Under a "control surface" is to be understood here in particular a surface of the operating element, to which an operator for actuating the operating element exerts a force. The operating surface of the operating element is preferably arranged on a side remote from the mechanical, electrical and / or electronic switching element side of the operating element. Due to the partial arrangement of the release element in the recess of the operating element can advantageously be achieved a stable arrangement of the release element. The release element can be advantageously supported on a dropping down of the machine tool switching device having, portable power tool on the control and thus advantageously protected from damage in a fall.

Advantageously, the locking device at least one blocking element to block a movement of the operating element in response to a position of the release element, which is fixed to the release element. Preferably, the blocking element is designed as a mechanical blocking element, which is intended to block a movement of the operating element due to a direct contact in a blocking position with a arranged in a housing of the portable power tool stop the locking device. However, it is also conceivable that the locking device comprises a plurality of locking elements, which are intended to block a movement of the operating element with arranged in the housing of the portable power tool stops the locking device. As a result, it is advantageously possible to largely prevent or reduce bending of the operating element when a force is applied by an operator to the operating element in the case of an unactuated release element. A number of stops, which are arranged in the housing, preferably corresponds to a number of blocking elements. In this case, the blocking elements can be fixed uniformly and / or unevenly distributed on the release element. Particularly preferably, the blocking element is moved by a movement of the release element from the blocking position and / or in the blocking position. A "blocking position" is to be understood here in particular as a position of the blocking element in which a movement of the operating element by means of the blocking element is largely prevented. Advantageously, the blocking element is connected by means of a non-positive, positive and / or material connection with the release element. Especially preferred the blocking element is fixed by means of a latching connection to the release element. However, it is also conceivable that the blocking element is fixed by means of a screw connection to the release element. The blocking element can preferably be moved translationally together with the release element. It can be advantageously achieved a space-saving design of the machine tool switching device according to the invention. It can be achieved structurally simple a largely blocking a movement of the control.

In an alternative embodiment of the machine tool switching device according to the invention, the blocking element is formed integrally with the release element. By "one piece" should be understood in particular at least materially connected connected, for example, by a welding process, a gluing process, a Anspritzprozess and / or another, the skilled person appear useful process, and / or advantageously formed in one piece, such as by a Manufacture from a casting and / or by a production in a one- or multi-component injection molding process and advantageously from a single blank. It may be advantageous to dispense with additional components to a compound of the blocking element and the release element.

In addition, it is proposed that the locking device has at least one spring element which is provided to act on the release element at least in one direction with a spring force. A "spring element" is to be understood in particular as a macroscopic element which has at least one extension that is elastically changeable by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50% in a normal operating state , And in particular generates a dependent of a change in the extension and preferably proportional to the change of counterforce, which counteracts the change. An "extension" of an element should, in particular, be understood to mean a maximum distance between two points of a vertical projection of the element onto a plane. A "macroscopic element" is intended in particular to mean an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm be understood. Preferably, the spring element is provided to act on the release element and / or the blocking element in the direction of the blocking position with a spring force. This can advantageously be achieved that the release element and / or the blocking element are moved to a lifting of a force on the operating element due to the spring force in the locked position.

Advantageously, the locking device has at least one further release element, which is arranged translationally movable together with the release element on the operating element. The release element and the further release element are, viewed along a longitudinal direction of the operating element, arranged spaced relative to each other. Particularly preferably, the release element and the further release element are interconnected by the blocking element. It can be advantageously achieved a comfortable operation of the locking device at different positions of the control.

In an alternative embodiment of the machine tool switching device according to the invention, it is proposed that the release element has an extent along a longitudinal direction of the operating element which is greater than 20% of a total extension of the operating element along the longitudinal direction. Preferably, the release element extends along the longitudinal direction over more than 40% and more preferably over more than 60% of a total extension of the operating element. In this case, the release element advantageously has on a side facing away from the blocking element of the release element on a gripping structure, such as a corrugated surface structure, a surface with finger hollows and / or another, to a person skilled in the sense appearing gripping structure. The release element can advantageously be operated comfortably over a large area of the total extension of the operating element along the longitudinal direction.

Furthermore, it is proposed that the operating element is rotatably mounted. Particularly preferably, the operating element is rotatably mounted about an axis of rotation extending parallel to the longitudinal direction of the operating element. The operating element in this case preferably comprises bearing extensions, which in a mounted state of the operating element in bearing recesses of a housing, in particular in a handle and / or handle portion, the portable power tool are arranged. In this case, the operating element preferably has an extent along the longitudinal direction of the operating element which is in particular greater than 40%, preferably greater than 60% and particularly preferably greater than 80% of a total extension of a handle and / or a grip region along the longitudinal direction of the operating element portable machine tool. It can be advantageously achieved a low tendency to pinch and a comfortable operation of the control.

Furthermore, the invention is based on a portable power tool with at least one machine tool switching device according to the invention. Particularly preferably, the portable power tool is designed as an angle grinder. However, it is also conceivable that the portable power tool has another, a skilled person appear appropriate design, such as a hand planer, a multifunction machine tool, as a portable milling machine, as a grinding machine, and / or as an electrically operated gardening tool. It can be advantageously achieved a high ease of use for an operator of the portable power tool.

The machine tool switching device according to the invention should not be limited to the application and embodiment described above. In particular, the machine tool switching device according to the invention may have a different number from a number of individual elements, components, units and devices mentioned herein for performing a functionality described herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination.

Fig. 1

eine erfindungsgemäße tragbare Werkzeugmaschine mit einer erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer schematischen Darstellung,

Fig. 2

eine Detailansicht der erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer Sperrstellung in einer schematischen Darstellung,

Fig. 3

eine Detailansicht der erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer Freigabestellung in einer schematischen Darstellung,

Fig. 4

eine Detailansicht einer Anordnung der erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer schematischen Darstellung,

Fig. 5

eine Detailansicht einer Verbindung zwischen einem Freigabeelement und einem Sperrelement der erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer schematischen Darstellung,

Fig. 6

eine Detailansicht einer alternativen Verbindung zwischen einem Freigabeelement und einem Sperrelement der erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer schematischen Darstellung,

Fig. 7

eine Detailansicht einer alternativen erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer Sperrstellung in einer schematischen Darstellung,

Fig. 8

eine Detailansicht einer weiteren alternativen erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer Sperrstellung in einer schematischen Darstellung,

Fig. 9

eine Detailansicht einer weiteren alternativen erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer Sperrstellung in einer schematischen Darstellung und

Fig. 10

eine Detailansicht einer weiteren alternativen erfindungsgemäßen Werkzeugmaschinenschaltvorrichtung in einer Sperrstellung in einer schematischen Darstellung.

Show it:

Fig. 1

a portable power tool according to the invention with a machine tool switching device according to the invention in a schematic representation,

Fig. 2

a detailed view of the machine tool switching device according to the invention in a blocking position in a schematic representation,

Fig. 3

a detailed view of the machine tool switching device according to the invention in a release position in a schematic representation,

Fig. 4

a detailed view of an arrangement of the machine tool switching device according to the invention in a schematic representation,

Fig. 5

a detailed view of a connection between a release element and a blocking element of the machine tool switching device according to the invention in a schematic representation,

Fig. 6

a detailed view of an alternative connection between a release element and a blocking element of the machine tool switching device according to the invention in a schematic representation,

Fig. 7

a detailed view of an alternative machine tool switching device according to the invention in a blocking position in a schematic representation,

Fig. 8

a detailed view of another alternative machine tool switching device according to the invention in a blocking position in a schematic representation,

Fig. 9

a detailed view of another alternative machine tool switching device according to the invention in a blocking position in a schematic representation and

Fig. 10

a detailed view of another alternative machine tool switching device according to the invention in a blocking position in a schematic representation.

Description of the embodiments

FIG. 1 shows a designed as angle grinder 36a portable power tool 12a with a machine tool switching device 10a. The angle grinder 36a has a power tool housing 38a that includes a gear housing 42a and a motor housing 44a. Further, the angle grinder 36a has a main handle 40a formed by the motor housing 44a. The main handle 40a extends from the gear housing 42a in a direction away from the gear housing 42a direction, which extends at least substantially parallel to a main extension direction 48a of the angle grinder 36a. In this case, the main handle 40a has an at least substantially cylindrical configuration. However, it is also conceivable that the main handle 40a another, the expert has a useful, in particular as an ergonomic sense, appearing embodiment. The motor housing 44a is provided for receiving a drive unit 50a of the angle grinder 36a. The gear housing 42a is provided for receiving an output unit 52a of the angle grinder 36a, which comprises a drive spindle 46a to a rotating drive of a machining tool (not shown here). An auxiliary handle fastening device 54a is disposed on the transmission housing 42a. The auxiliary handle attachment device 54a has a plurality of auxiliary handle receiving elements 56a (in FIG FIG. 1 only one auxiliary handle receiving element 56a to recognize), which are arranged distributed uniformly along a circumferential direction on the transmission housing 42a. The auxiliary handle receiving elements 56a are provided to receive a mounting portion of a removable auxiliary handle (not shown here). The attachment region of the auxiliary handle can be screwed into the auxiliary handle receiving elements 56a, for example by means of a screw connection for fixing the auxiliary handle to the transmission housing 42a. In an assembled state of the attachment area of the auxiliary handle in an auxiliary handle receiving element 56a, the auxiliary handle extends transversely to the main extension direction 48a of the angle grinder 36a.

The machine tool switching device 10a comprises a switching unit 14a, which has a movably mounted operating element 16a for actuating a mechanical, electrical and / or electronic switching element 18a of the switching unit 14a. The operating element 16a is arranged on a side of the main handle 40a facing the drive spindle 46a on the main handle 40a. Alternatively, the operating element 16a could also be arranged on a side of the main handle 40a facing away from the drive spindle 46a or on another side that appears appropriate to a person skilled in the art. In particular, the main handle 40a could be rotatable relative to the transmission housing 42a. The operating element 16a extends along a longitudinal direction 34a of the operating element 16a, which extends at least substantially parallel to the main extension direction 48 of the angle grinder 36a, on the main handle 40a and on the motor housing 44a, respectively. In this case, an overall extension of the operating element 16a along the longitudinal direction 34a corresponds to approximately 80% of a total extension of the main handle 40a along the longitudinal direction 34a. The operating element 16a has an operating surface 62a with an at least substantially rectangular projection surface. The operating surface 62a is arched in a direction away from the main handle 40a direction. Between the operating element 16a and the main handle 40a, a sealing element 134a of the angle grinder 36a is arranged, as a result of which an inner space enclosed by the main handle 40a or by the motor housing 44a is protected from the ingress of dirt and / or dust. The sealing element 134a is arranged in a groove in the main handle 40a or in the motor housing 44a, which faces the operating element 16a. The switching element 18a is arranged in the space enclosed by the main handle 40a and by the motor housing 44a. Here, the switching element 18a is arranged in a region of the interior, which is arranged on a side facing away from the transmission housing 42a of the main handle 40a and the motor housing 44a.

The operating element 16a is movably mounted on the main handle 40a or on the motor housing 44a. Here, the operating element 16a is pivotally mounted on the main handle 40a or on the motor housing 44a. The operating element 16a has two bearing pins 64a, 66a ( FIG. 4 ), which are provided, the operating element 16a about a parallel to the main extension direction 48a of the angle grinder 36a aligned axis 68a relative to the main handle Store 40a and the motor housing 44a pivotally. The bearing pins 64a, 66a are integrally formed on the operating element 16a. However, it is also conceivable that the bearing pins 64a, 66a are fixed by means of a positive and / or a frictional connection on the control element 16a. The main handle 40a and the motor housing 44a comprises two bearing receptacles 70a, 72a, in which the bearing pins 64a, 66a are arranged in an assembled state of the operating element 16a. The operating element 16a can be pivoted into the interior space enclosed by the main handle 40a or by the motor housing 44a as a result of an interaction of the bearing pins 64a, 66a and the bearing receivers 70a, 72a. The switching unit 10a includes a spring element not shown in detail, which causes a force on the operating element 14a to pivot the operating element 16a after lifting an action of an operator on the operating element 16a from the interior to a starting position in which the switching element 18a of the control element 16a is unactuated. The operating element 16a has a stop (not shown in detail here) which, in an unactuated state of the operating element 16a, bears against an inner wall of the main handle 40a or of the motor housing 44a delimiting the inner space enclosed by the main handle 40a or by the motor housing 44a. The stop prevents a complete swinging out of the operating element 16a due to a spring force of the spring element, not shown, from the interior of the main handle 40a and the motor housing 44a enclosed.

The operating element 16a furthermore has an actuating extension 88a for actuating the mechanical, electrical and / or electronic switching element 18a of the switching unit 14a ( FIG. 2 ). The actuating extension 88a is provided to actuate the switching element 18a as a result of a pivoting movement of the operating element 16a. The actuating extension 88a extends, starting from the operating element 16a, into the inner space enclosed by the main handle 40a or by the motor housing 44a. Furthermore, in an assembled state of the operating element 16a, the actuating extension 88a is arranged on the operating element 16a on a side of the operating element 16a facing away from the gearbox 42a. The switching element 18a is formed here as an electrical pressure switch.

Furthermore, the machine tool switching device 10a comprises a blocking device 20a for blocking at least one movement of the operating element 16a, which has a movably mounted release element 22a, which is intended to lift the blocking of the operating element 16a. The release element 22a is mounted translationally movable. In this case, the release element 22a is mounted in a translationally movable manner on the operating element 16a. Thus, the release member 22a is formed as a slide switch. The release element 22a is partially disposed in a recess 58a of the operating element 16a. The edge regions bordering the recess 58a each have an equal distance to an edge of the operating element 16a along the main extension direction 48a. Thus, the recess 58a is centrally located and / or the release element 22a at least in an operating position in the control element 16a.

FIG. 2 shows an arrangement of the release element 22a in the recess 58a of the operating element 16a. An actuating region 74a of the release element 22a extends beyond the operating surface 62a along a direction extending at least substantially perpendicular to the operating surface 62a of the operating element 16a. A slot-shaped recess 78a is introduced in an edge region 76a of the operating element 16a bounding the recess 58a to the inner space surrounded by the main handle 40a or by the motor housing 44a. The slot-shaped recess 78a is provided to receive a guide portion 82a of the release member 22a. The Führungsberiech 82 a extends through the slot-shaped recess 78 a into the interior of the main handle 40 a and surrounded by the motor housing 44 a inside. On the guide portion 82a, two fastening elements 84a, 86a of the release element 22a are arranged. The fasteners 84a, 86a are integrally formed with the guide portion 82a. The fastening elements 84a, 86a are designed as latching hooks ( FIG. 5 ). However, it is also conceivable that more than two latching hooks are arranged on the guide region 82a and / or that the fastening elements 84a, 86a have another design that appears appropriate to a person skilled in the art.

The locking device 20a has a blocking element 26a for blocking a movement of the operating element 16a as a function of a position of the release element 22a, which is fixed to the release member 22a. In this case, the blocking element 26a is fixed to the release element 22a by means of the fastening elements 84a, 86a designed as latching hooks. For this purpose, the blocking element 26a has a connection recess 94a which corresponds to the fastening elements 84a, 86a designed as latching hooks. The guide portion 82a extends in a mounted state of the locking element 26a on the release element 22a in a corresponding with the guide portion 82a recess (not shown here) of the locking element 26a to prevent rotation of the locking element 26a relative to the release element 22a. The locking elements designed as latching hooks 84a, 86a engage behind the blocking element 26a in an assembled state, so that the blocking element 26a is fixed to the release element 22a along a direction extending at least substantially parallel to the main extension direction 48a and along a direction at least substantially perpendicular to the main extension direction 48a , However, it is also conceivable that the blocking element 26a has more than one recess for receiving fastening elements 84a, 86a of the release element 22a. The blocking element 26a has an overall extension along the longitudinal direction 34a which corresponds to more than 70% of an overall extension of the release element 22a along the longitudinal direction 34a.

In FIG. 6 Alternative fastening elements 84a ', 86a' are shown. The alternative fastening elements 84a ', 86a' are designed as screws which can be screwed into threaded bores 90a ', 92a' of the release element 22a '. The threaded bores 90a ', 92a' are introduced into the guide region 82a 'on a side of the guide region 82a' which faces the inner space enclosed by the main handle 40a or the motor housing 44a. In this case, the blocking element 26a 'has two connecting recesses 94a', 106a ', through which the fastening elements 84a', 86a 'configured as screws engage in an assembled state.

The locking device 20a further comprises a spring element 28a, which is provided to act on the release element 22a at least in one direction 32a with a spring force. The spring element 28a is in this case designed as a compression spring, in particular as a helical compression spring. However, it is also conceivable the spring element 28a has another configuration that appears appropriate to a person skilled in the art, such as a tension spring, a torsion spring, etc. The spring element 28a is arranged in the slot-shaped recess 78a of the operating element 16a. One end of the spring element 28a is arranged on a bolt-shaped holding element 96a of the operating element 16a. The holding element 96a is formed integrally with the operating element 16a. Another end of the spring element 28a is arranged on a bolt-shaped holding element 98a of the guide region 82a of the release element 22a ( FIG. 4 ). Thus, the spring element 28a is supported with one end on the operating element 16a and with the other end on the release element 22a. The spring element 28a is provided to act on the release element 22a and the locking element 26a together in the direction of a locking position of the locking element 26a with a spring force.

In the blocking position of the blocking element 26a, the blocking element 26a bears with a blocking extension 100a against a stop surface 104a of an abutment 102a of the blocking device 20a arranged in the interior space enclosed by the main handle 40a or the motor housing 44a ( FIG. 2 ). The locking extension 100a extends from the blocking element 26a in a direction away from the release element 22a direction. The abutment surface 104a of the stopper 102a is arranged on a side of the abutment 102a facing the operating element 16a. The stop 102a has along the main extension direction 48a at a distance from the switching element 18a, which corresponds approximately to a total extension of the locking element 26a along the longitudinal direction 34a. By means of the abutment of the locking extension 100a on the abutment surface 104a of the abutment 102a, movement of the operating element 16a in the blocking position of the blocking element 26a is largely prevented. Thus, an operation of the switching element 18a is prevented by the actuating extension 88a and commissioning of the angle grinder 36a is prevented. However, it is also conceivable that the blocking element 26a has two or more locking extensions 100a, which cooperate with a stop surface 104a of stops 102a in a blocking position of the blocking element 26a to prevent movement of the operating element 16a in the blocking position of the blocking element 26a as far as possible. In an alternative embodiment of the blocking element 26a, not shown here, the blocking element has two Lock extensions 100a on. In this case, one of the locking extensions 100a is arranged on a region of the blocking element 26a facing the transmission housing 42a, and one of the locking extensions 100a is arranged on a region of the blocking element 26a facing the switching element 18a. The locking extensions 100a cooperate in a blocking position of the locking element 26a with stop surfaces 104a of stops 102a, which are arranged in the space enclosed by the main handle 40a and the motor housing 44a interior.

For putting the angle grinder 36a into operation, an operator has to move the release element 22a and the blocking element 26a out of the blocking position of the blocking element 26a. An operator in this case moves the release element 22a in translation in the operating element 16a, in particular in a direction away from the transmission housing 42a. However, it is also conceivable that the operator must move the release element 22a in another direction, which seems appropriate to a person skilled in the art, in order to move the blocking element 26a out of the blocking position, for example in a direction facing the transmission housing 42a. As a result of the movement of the release element 22a, as a result of the fixing of the blocking element 26a by means of the fastening elements 84a, 86a on the release element 22a, the blocking element 26a likewise moves translationally in a direction away from the transmission housing 42a. The locking extension 100a of the locking element 26a is thus moved away from the stop surface 104a of the stopper 102a. As a result, a possibility of movement of the operating element 16a in the direction of the switching element 18a is released. The operator can now take the angle grinder 36a into operation as a result of a force acting on the operating element 16a in the direction of the switching element 16a. In this case, the switching element 18a is actuated by means of the actuating extension 88a of the operating element 16a, whereupon a circuit is closed to a power supply of the electric motor designed as a drive unit 50a. After a cancellation of a force of the operator on the control element 16a in the direction of the switching element 18a, the control element 16a is moved by the spring element not shown in a direction away from the switching element 18a direction. In this case, the release element 22a is moved together with the blocking element 26a by a spring force of the spring element 28a, which is arranged between the operating element 18a and the release element 22a, in the direction of the blocking position of the blocking element 26a. Consequently the blocking element 26a again comes into contact with the abutment surface 104a of the abutment 102a facing the operating element 18a and blocks as far as possible a movement of the operating element 16a in the direction of the switching element 18a.

In FIGS. 7 to 10 Alternative embodiments are shown. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, the letters a to e are added to the reference numerals of the embodiments. The following description is limited essentially to the differences from the first embodiment in the FIGS. 1 to 6 , wherein with respect to the same components, features and functions on the description of the first embodiment in the FIGS. 1 to 6 can be referenced.

FIG. 7 shows an alternative machine tool switching device 10b of a portable power tool 12b. The portable power tool 12b has a to the in the FIGS. 1 to 6 described portable power tool 12a analog construction on. The machine tool switching device 10b comprises a switching unit 14b, which has a movably mounted operating element 16b for actuating a mechanical, electrical and / or electronic switching element 18b, and a blocking device 20b for blocking at least one movement of the operating element 16b, which has a movably mounted release element 22b intended to cancel the blocking of the control element 16b. The release element 22b is mounted so as to be translationally movable in a recess 58b of the operating element 16b. The locking device 20b has a blocking element 26b for blocking a movement of the operating element 16b as a function of a position of the release element 22b which is fixed to the release element 22b. The blocking element 26b has a total extension along a longitudinal direction 34b of the operating element 16b, which is approximately twice as large as a total extent of the release element 22b along the longitudinal direction 34b. The blocking element 26b is in a blocking position against a stop surface 104b of a stop 102b of the blocking device 20b. The stop 102b has a distance to the switching element, along the longitudinal direction 34b about 20% of the total extension of the release element 22b corresponds. With regard to a function, a structure and an arrangement of the individual elements, components, units and devices may essentially on the description of the FIGS. 1 to 6 to get expelled.

FIG. 8 shows another alternative machine tool switching device 10c of a portable power tool 12c. The portable power tool 12c has one to that in the FIGS. 1 to 6 described portable power tool 12a analog construction on. The machine tool switching device 10c comprises a switching unit 14c, which has a movably mounted operating element 16c for actuating a mechanical, electrical and / or electronic switching element 18c, and a blocking device 20c for blocking at least one movement of the operating element 16c, which has a movably mounted release element 22b is intended to cancel the blocking of the control element 16c. In addition, the locking device 20c on another release element 24c, which is arranged translationally movable together with the release element 22c on the control element 16c. The release elements 22c, 24c are mounted translationally movable in recesses 58c, 60c of the operating element 16c. The recesses 58c, 60c are arranged spaced apart along a longitudinal direction 34c of the operating element 16c. The blocking device 20c has a blocking element 26c for blocking a movement of the operating element 16c as a function of a position of the release elements 22c, 24c, which is fixed to the release elements 22c, 24c. In this case, the blocking element 26c has two connecting recesses 94c, 106c in which fastening elements 84c, 86c, 108c, 110c of the release elements 22c, 24c designed as latching hooks engage and fix the blocking element 26c to the release elements 22c, 24c. Furthermore, the locking device 20c has two spring elements 28c, 30c, which are provided to act on the release elements 22c, 24c at least in a direction 32c with a spring force. With regard to a function, a structure and an arrangement of the individual elements, components, units and devices may essentially on the description of the FIGS. 1 to 6 to get expelled.

FIG. 9 shows another alternative machine tool switching device 10d of a portable power tool 12d. The portable power tool 12d has one to that in the FIGS. 1 to 6 described portable power tool 12a analog structure on. The machine tool switching device 10d comprises a switching unit 14d which has a movably mounted operating element 16d for actuating a mechanical, electrical and / or electronic switching element 18d, and a blocking device 20d for blocking at least one movement of the operating element 16d, which has a movably mounted release element 22d intended to cancel the blocking of the control element 16d. The release element 22d is mounted so as to be translationally movable in a recess 58d of the operating element 16d. The blocking device 20d has a blocking element 26d for blocking a movement of the operating element 16d as a function of a position of the release element 22d, which is fixed to the release element 22d. The release element 22d has an extension along a longitudinal direction 34d of the operating element 16d, which is greater than 20% of a total extension of the operating element 16d along the longitudinal direction 34d. In particular, the release element 22d has an extent along the longitudinal direction 34d which is greater than 40% of a total extension of the operating element 16d along the longitudinal direction 34d.

The release element 22d furthermore has a corrugated surface structure on a side of the release element 22d facing away from the blocking element 26d, in order to achieve a high grip when actuated by a hand and / or a finger of an operator. Furthermore, the release element 22d has two guide regions 82d, 112d, which are arranged spaced apart along the longitudinal direction 34d. The guide areas 82d, 112d are each arranged in a slot-shaped recess 78d, 80d in the operating element 16d. The blocking element 26d has two connecting recesses 94d, 106d into which locking elements 84d, 86d, 108d, 110d of the release element 22d designed as latching hooks engage for fixing the blocking element 26d to the release element 22d. A locking extension 100d of the locking element 26d is in this case arranged along the longitudinal direction 34d between the connecting recesses 94d, 106d. Furthermore, the locking device 20d has two spring elements 28d, 30d, which are provided to act on the release element 22d at least in a direction 32d with a spring force. With regard to a function, a structure and an arrangement of the individual elements, components, units and devices may essentially on the description of the FIGS. 1 to 6 to get expelled.

FIG. 10 shows another alternative machine tool switching device 10e of a portable power tool 12e. The portable power tool 12e has one to the in the FIGS. 1 to 6 described portable power tool 12a analog construction on. The machine tool switching device 10e comprises a switching unit 14e, which has a movably mounted operating element 16e for actuating a mechanical, electrical and / or electronic switching element 18e, and a blocking device 20e for blocking at least one movement of the operating element 16e, which has a movably mounted release element 22e is intended to cancel the blocking of the control element 16e. The release element 22e is mounted in a translationally movable manner in a recess 58e of the operating element 16e. In this case, the release element 22e has two storage areas 118e, 120e, in each of which a storage recess 122e, 124e of the release element 22e is arranged. The Lagerungsausnehmungen 122e, 124e are provided to cooperate in a mounted state of the release member 22e with guide pins 126e, 128e of the control element 16e. The guide pins 126e, 128e are disposed in the recess 58e. One of the guide pins 126e, 128e is in this case integrally formed on a recess 58e bounding edge region of the operating element 16e. Another of the guide pins 128e is integrally formed on an at least substantially perpendicular to a longitudinal direction 34e of the operating element 16e extending web-shaped stabilizing element 132e. In this case, the stabilizing element 132e extends transversely within the recess 58e. Furthermore, a spring element 28e of the blocking device 20e is arranged with one end on the guide pin 128e integrally formed on the stabilizing element 132e and arranged with another end on a further guide pin 130e integrally formed on an edge region delimiting the recess 58e. The spring element 28e is provided to act on the release element 22e at least in a direction 32e with a spring force.

The blocking device 20e has a blocking element 26e for blocking a movement of the operating element 16e as a function of a position of the releasing element 22e which is fixed to the releasing element 22e. Here, the blocking element 26e is formed integrally with the release element 22e. moreover the blocking element 26e has an L-shaped configuration. A first leg 114e of the locking element 26e runs in an assembled state of the release element 22e at least substantially parallel to a longitudinal direction 34e of the operating element 16e. A second leg 116e extends at least substantially perpendicular to the first leg 114e. The second leg 116e forms a locking extension 100e, which is intended to cooperate with a stop 102e of the locking device 20e in order to block a movement of the operating element 16e. Furthermore, the locking extension 100e acts on a side facing away from the stop 102e of the locking element 26e with a transfer extension 136e of the operating element 16e together. The transfer extension 136e is intended to transmit a force to the locking extension 100e when a force is exerted by an operator on the operating element 16e in a blocking position of the blocking element 26e in order to largely prevent a movement of the operating element 16e. The transfer extension 136e extends from the operating element 16e in the direction of the stop 102e. Here, the transfer extension 136e is formed integrally with the operating element 16e. However, it is also conceivable that the transfer extension 136e is fixed by means of a positive and / or by means of a non-positive connection to the operating element 16e. With regard to a function, a structure and an arrangement of the individual elements, components, units and devices may essentially on the description of the FIGS. 1 to 6 to get expelled.

Claims (9)

1. Machine tool switching device, in particular for portable machine tools, said machine tool switching device having at least one switching unit (14a; 14b; 14c; 14d; 14e) which has at least one movably mounted control element (16a; 16b; 16c; 16d; 16e) for actuating a mechanical, electric and/or electronic switching element (18a; 18b; 18c; 18d; 18e), and having at least one blocking device (20a; 20b; 20c; 20d; 20e) for blocking at least one movement of the control element (16a; 16b; 16c; 16d; 16e), said blocking device having at least one movably mounted release element (22a; 22b; 22c, 24c; 22d; 22e) which is provided for the purpose of lifting the block of the control element (16a; 16b; 16c; 16d; 16e), characterized in that the release element (22a; 22b; 22c, 24c; 22d; 22e) is mounted on the control element (16a; 16b; 16c; 16d; 16e) so as to be movable in a translatory manner.
2. Machine tool switching device according to one of the preceding claims, characterized in that the release element (22a; 22b; 22c, 24c; 22d; 22e) is arranged at least in part in a recess (58a; 58b; 58c, 60c; 58d; 58e) of the control element (16a; 16b; 16c; 16d; 16e).
3. Machine tool switching device according to one of the preceding claims, characterized in that the blocking device (20a; 20b; 20c; 20d; 20e) has at least one blocking element (26a; 26b; 26c; 26d; 26e) for blocking a movement of the control element (16a; 16b; 16c; 16d; 16e) in dependence on a position of the release element (22a; 22b; 22c, 24c; 22d; 22e), said blocking element being fixed on the release element (22a; 22b; 22c, 24c; 22d; 22e).
4. Machine tool switching device according to Claim 3, characterized in that the blocking element (26e) is realized integrally with the release element (22e).
5. Machine tool switching device according to one of the preceding claims, characterized in that the blocking device (20a; 20b; 20c; 20d; 20e) has at least one spring element (28a; 28b; 28c, 30c; 28d, 30d; 28e) which is provided for the purpose of acting upon the release element (22a; 22b; 22c, 24c; 22d; 22e) with a spring force at least in one direction (32a; 32b; 32c; 32d; 32e).
6. Machine tool switching device according to one of the preceding claims, characterized in that the blocking device (20c) has at least one further release element (24c) which is arranged together with the release element (22c) on the control element (16c) so as to be movable in a translatory manner.
7. Machine tool switching device according to one of the preceding claims, characterized in that along a longitudinal direction (34d) of the control element (16d) the release element (22d) has an extension which is greater than 20% of an overall extension of the control element (16d) along the longitudinal direction (34d).
8. Machine tool switching device according to one of the preceding claims, characterized in that the control element (16a; 16b; 16c; 16d; 16e) is pivotably mounted.
9. Portable machine tool, in particular right angle grinding tool, having at least one machine tool switching device according to one of the preceding claims.

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