DE202015103563U1 - Hand-held engine tool - Google Patents

Abstract

A handheld power tool (100) comprising an internal combustion engine (30) having an ignition device (32) and an operating lever (10) by means of which the internal combustion engine (30) is adjustable to various modes of operation with a contact spring for adjustment of the various modes of operation (18, 18 ', 18' ', 18' '') along a guide contour (17) formed on an outer side of a mode selector (14) arranged on the operating lever (10) when the operating lever (10) is moved into an off position (FIG. 11), a start-up position (12) and a choke position (13) of the internal combustion engine (30) can be guided, characterized in that the contact spring (18, 18 ', 18' ', 18' '') along the guide contour (17) is guided such that upon movement of the operating lever (10) from the start-up position (12) in the choke position (13), the contact spring (18, 18 ', 18' ', 18' '') before Reaching the choke position (13) contacted with a contact element (15), so that a de R ignition circuit (32) associated circuit is closed.

Description

The present invention relates to a hand-held engine working device, which has an ignition device having an internal combustion engine and an operating lever, by means of which the internal combustion engine in different operating modes is adjustable, wherein for adjusting the various operating modes, a contact spring along an arranged on an outside of a control lever on the operating mode trained guide contour when moving the operating lever in a start-up position, an off position and a choke position of the engine is feasible. Furthermore, the invention relates to a method for setting various operating modes of an internal combustion engine of a hand-held engine operating unit, in which a contact spring along a formed on an outer side of an operating lever arranged on a control lever operating contour when moving the operating lever in a start-up position, an off position and a choke Position of the internal combustion engine is performed.

State of the art

A hand-held engine work tool, such as a power saw, a power grinder or a Grünanlagenpflegegerät, for example, from DE 10 2009 011 684 A1 known. This has an ignition device having an internal combustion engine and an operating lever, by means of which the internal combustion engine is adjustable in different operating modes, on. The operating lever, which is rotatably mounted on a mode selector, can be rotated in two different directions of rotation starting from a start-up position in which the internal combustion engine is on and running. In the first direction of rotation starting from the startup position, the valves of a carburetor of the internal combustion engine are adjusted by transferring the operating lever into a choke position. By turning the operating lever starting from the start-up position in the opposite direction to the first rotational direction formed second rotational direction of the operating lever can be brought into an off position, in this off position of the engine by closing a circuit via an electrical contact with a contact spring a contact element is turned off.

In such a trained hand-held engine working device, however, there may be a risk that by incorrect operation of the user this can turn off the engine not only on the off position, but also on the choke position. Since there is too much fuel in the combustion chamber of the internal combustion engine in the choke position, restarting the engine is made much more difficult.

DESCRIPTION OF THE INVENTION: Problem, Solution, Advantages

It is therefore the object of the present invention to provide a hand-held engine working device and a method for setting various operating modes of an internal combustion engine of a hand-held engine working device, in which a maloperation by a user can be avoided.

This object is achieved with the features of the independent claims. Advantageous embodiments and further developments of the invention are specified in the dependent claims.

The hand-held engine working device according to the invention is characterized in that the contact spring is guided along the guide contour such that, upon movement of the operating lever from the start-up position to the choke position, the contact spring contacts a contact element before reaching the choke position, so that a circuit associated with the ignition device is closed.

According to the invention, it is now provided that the internal combustion engine is switched off not only in the off position of the operating lever, but that the internal combustion engine is stopped or turned off even before reaching the choke position. This is achieved in that on the way to the open position of the choke flap and thus before reaching the choke position, an electrical switching pulse is triggered by contacting the contact spring with a contact element, so that a control circuit of the command can be given, the engine and thus the Turn off the power tool. The operating lever may be integrally connected to the mode selector, wherein the mode selector is preferably in the form of an operating shaft and can be rotated by a pivoting of the operating lever about a rotation axis. On the outside of the mode selector, a guide contour is formed, wherein the contact spring rests with one of its free ends on this guide contour and the contact spring by moving the operating lever in the various, the operating modes of the internal combustion engine engine forming positions, in particular the start-up position, the Aus Position and the choke position, along the guide contour can be performed. The internal combustion engine can now be turned off in addition to the actual off position even before reaching the choke position, so that no spark in the ignition device can be generated more. This is achieved in that the contact spring when Föhren the contact spring along the guide contour before reaching the choke position with a Contacted contact element, wherein by contacting the contact spring with the contact element, a circuit of the ignition device can be closed, so that a spark in the ignition device can not be generated. The contact element is positioned such that the contact spring contacted during a transfer or movement of the operating lever of the start-up position in the choke position with the contact spring, so that a contact of the contact spring with the contact element not until reaching the choke position, but can be done before reaching the choke position. Before reaching the choke position, the internal combustion engine can be switched off. As a result, switching off the internal combustion engine is not first in the choke position itself. A difficult starting of the engine working device or the internal combustion engine due to too much fuel in the combustion chamber of the internal combustion engine can be prevented. Overall, a maloperation of the hand-held engine working unit or the internal combustion engine of the hand-held engine working device can be prevented by a user, since now the user trained in the ignition circuit by turning the operating lever in both directions and not only when turning in a direction of rotation, as in the known hand-held engine working equipment is the case, close and thus can turn off the engine.

It is preferably provided that the contact element is arranged on the mode selector. The contact element may be at least partially embedded in the mode selector or be encapsulated by this, so that only a portion of the contact element protrudes from the mode selector and thus protrudes from the guide contour to allow a contact with the contact spring can.

Alternatively, it may also be provided that the contact element is positioned at a component remote from the mode selector. The contact element does not necessarily have to be arranged on the mode selector itself, but can be positioned away from the mode selector. Preferably, the contact element is positioned at a constant, unchangeable distance to the operating lever or the mode selector even with a rotational movement of the mode selector, whereby a secure contact of the contact element with the contact spring between the commissioning position and the choke position ensured or guaranteed can be.

The remotely located component on which the contact element can be arranged, for example, be an intake manifold, which forms a connection between the engine block and the carburetor or the injection system of the internal combustion engine. However, the contact element can also be arranged on other, to the mode selector remotely located components of the hand-held engine work tool.

The guide contour on the outside of the mode selector is preferably not circular, but it preferably has a first elevation, a second elevation and a depression formed between the first elevation and the second elevation, wherein it is preferably provided that the off position adjoins the first survey, the choke position on the second survey and the commissioning position in the sink are formed. When traveling along the contact spring along the guide contour by a rotary movement of the operating lever or the mode selector, the contact spring can be raised and lowered when guided along the elevations and the sink. The start-up position is formed between the off position and the choke position. During the movement of the contact spring from the start position to the off position or from the start position to the choke position, the contact spring thus has to overcome a slope, whereby a certain force acts on the contact spring, which feel the user to the operating lever can and against which the user must apply a certain counterforce to allow guiding of the contact spring along the guide contour. The user must therefore spend a certain operating force to move the operating lever against the force of the contact spring from the start position to the off position or in the choke position, since the operator when moving the operating lever, the contact spring on the guide contour of the Operating lever must raise so that it can be moved from the formed in the sink start-up position by overcoming the elevations formed by the projections in the longitudinal direction of the guide contour slopes in the direction of the choke position or the off position. Incorrect operations by the user can be further reduced thereby.

In order to be able to prevent even safer misuse by the user, it is further preferred that the first survey has a different height to the second survey. Due to these different heights, different operating forces are to be applied by the user in order to be able to move the operating lever and thus the operating mode controller starting from the startup position into the choke position or into the off position. For example, it may be provided that the first elevation, on which the off position is formed, a smaller Height than the second elevation at which the choke position is formed. The user then has to apply a greater force to bring the operating lever from the start position to the choke position, as to bring the operating lever from the start position to the off position.

More preferably, it is provided that the guide contour between the start-up position and the choke position has a first guide path and a second guide path, wherein upon movement of the operating lever of the start-up position in the choke position, the contact spring along the first guide path is guided and contacted with the contact element, and wherein during a movement of the operating lever from the choke position to the start position, the contact spring along the second guide path is guided without a contact with the contact element. By the two, at least partially different guide paths on the guide contour between the start-up position and the choke position can be achieved that a shutdown of the engine can be done with a movement of the operating lever of the start-up position in the choke position However, switching off the internal combustion engine during a movement of the operating lever in the reverse direction from the choke position to the start position can be prevented. As a result, the operation of the hand-held engine working device can be further optimized. In this case, the second guide track is preferably formed at least in regions different from the first guide track along the guide contour. A contacting of the contact spring with the contact element thus takes place preferably only when traveling along the contact spring along the first guide path and thus in a movement of the start-up position in the choke position and not on a traversing the contact spring along the second guide path and thus during a movement from the choke position to the start position.

To form the second guide path, the guide contour can preferably be designed such that the guide contour at least partially overlaps the contact element. By spreading over the contact element, the contact spring can be guided over the contact element over it during the guiding along the second guide path, without a contacting or contact of the contact spring with the contact element taking place. In the region of the overlapping of the contact element by the guide contour, the guide contour preferably forms a kind of partial cover of the contact element, wherein the partial cover of the contact element prevents contact of the contact spring with the contact element preferably only in a movement of the choke position in the start position and not in a movement from the start-up position to the choke position. In the movement from the start-up position into the choke position, despite contacting the contact element by the guide contour, contacting of the contact spring with the contact element takes place.

The overlapping of the guide contour can be formed, for example, by a ramp formed on the guide contour. The ramp can be designed such that it projects beyond the contact element. Preferably, the ramp has a curvature, in particular an arcuate curvature, along which the contact spring can be guided when moving from the start position to the choke position and back. The ramp may cause the contact spring abuts an edge of the ramp when moving the operating lever from the start position to the choke position and thereby contacted with the contact element, whereas when guiding the contact spring by moving the operating lever of the choke Position in the commissioning position, the contact spring when guided along the ramp, the contact spring can skip the contact element, so that no contact of the contact spring can be formed with the contact element.

Further, it can be provided that the second guide track is formed laterally offset from the first guide track, so that when a change of the contact spring from the first guide track to the second guide track, the contact spring is moved transversely to the longitudinal direction of the guide contour. Such a configuration of the first guide track and the second guide track is preferably provided when the contact element is not arranged on the mode selector, but on a remote from the mode selector member. Due to the transverse displacement of the contact spring when transferring the contact spring from the first guide track to the second guide track, contact or contacting of the contact spring with the contact element remote from the mode selector can be prevented when moving the operating lever from the choke position to the start position.

Serves the contact element exclusively to contact between the start-up position and the choke position with the contact spring and not directly in the off position, the hand-held engine working device may have a second contact element, by means of which the contact spring in the off position of the internal combustion engine can contact with the contact element. The second contact element is preferably arranged on the mode selector. But it is also possible that the second contact element at a remote to the operating mode adjuster arranged component of the hand-held engine work unit is arranged.

The solution of the object according to the invention also takes place by means of a method for setting different operating modes of an internal combustion engine of a hand-held engine operating unit, which is characterized in that with a movement of the operating lever of the start-up position in the choke position, the contact spring before reaching the choke position contacted a contact element, whereby an ignition device of the internal combustion engine associated circuit is closed. Before reaching the choke position, the internal combustion engine can be switched off. As a result, switching off the internal combustion engine is not first in the choke position itself. A difficult starting of the engine working device or the internal combustion engine due to too much fuel in the combustion chamber of the internal combustion engine can be prevented. Overall, a maloperation of the hand-held engine working unit or the internal combustion engine of the hand-held engine working device can be prevented by a user, since now the user a trained in the ignition circuit by turning the control lever in both directions and not only when turning in a direction of rotation, as in the known hand-held engine working equipment is the case, close and thus can turn off the engine.

Brief description of the drawings

Further measures which improve the invention are described in more detail below together with the description of preferred embodiments of the invention with reference to the figures. Show it:

1 a schematic representation of a mode selector, two contact elements and a contact spring according to an embodiment of the invention,

2 a schematic representation of a mode selector, two contact elements and a contact spring according to a further embodiment of the invention,

3 a schematic representation of a mode selector, a contact element and a contact spring according to a further embodiment of the invention,

4 a schematic representation of a mode selector, two contact elements and a contact spring according to a further embodiment of the invention,

5 a schematic representation of a mode selector, a contact element and a contact spring according to a further embodiment of the invention,

6 a schematic representation of in 5 shown embodiment in a plan view, and

7 a schematic representation of a motorized working device.

Preferred embodiments of the invention

A hand-held engine tool 100 as it is in 7 is shown schematically may be formed, for example in the form of a power saw. A trained as a power saw hand-held engine working device usually has a housing on which a rear handle and a handle tube are arranged. At the rear handle facing away from the side of the housing protrudes a guide rail to the front, on which a saw chain is driven in rotation. The saw chain is from an internal combustion engine 30 driven, which is arranged in the housing. The internal combustion engine 30 owns a carburetor 31 , is sucked through the fuel / air mixture. The housing also has an ignition device 32 arranged, which is an ignition of the fuel / air mixture in the combustion chamber of the internal combustion engine 30 controls. For this purpose, a spark plug protrudes into the combustion chamber of the internal combustion engine 30 , For operation of the internal combustion engine 30 is mounted on the rear handle a throttle.

Adjacent to the rear handle protrudes from the housing as in 1 to 7 illustrated operating lever 10 out, with the different or different operating modes of the internal combustion engine 30 can be adjusted. The operating lever 10 can by a user of the engine tool in an off position 11 , in a commissioning position 12 and in a choke position 13 be transferred, in particular rotated, these different positions of the operating lever 10 the various operating modes of the internal combustion engine 30 correspond. After starting the internal combustion engine 30 becomes the operating lever 10 automatically in the commissioning position 12 posed.

At one end of the control lever 10 is a mode selector 14 arranged, which is designed as a control shaft and about a rotation axis 25 is pivotally mounted. The mode selector 14 and the control lever 10 are integrally connected to each other in the embodiments shown here, so that upon movement of the operating lever 10 by a user for setting the various operating modes of the internal combustion engine 30 the mode selector 14 around its axis of rotation 25 is pivoted, whereby by the different positions, the off position 11 , the commissioning position 12 and the choke position 13 , can be adjusted.

At the in 1 shown embodiment are on the mode selector 14 a first contact element 15 and a second contact element 16 arranged. As in 7 can be seen, are the two contact elements 15 . 16 over a cable 35 with the ignition device 32 connected.

Both contact elements 15 . 16 are in the mode selector 14 so embedded that only a small portion of the two contact elements 15 . 16 each from the mode selector 14 protrude. On an outside of the mode selector 14 is a leadership contour 17 formed along which a contact spring 18 can be performed. The guideway or the guide path, along which the contact spring 18 on the guide contour 17 is moved at the in 1 shown embodiment with 22 characterized. At the in 1 the embodiment shown, the guideway or guide extends 22 over the entire length of the guide contour 17 ,

The contact spring 18 For example, with the metallic housing of the engine 30 be connected. At the in 7 The embodiment shown is the contact spring 18 over a screw 33 on an intake manifold 34 attached.

The two contact elements 15 . 16 protrude from the mode selector 14 so apparent that these of the guide contour 17 on the outside of the mode selector 14 protrude. During a movement of the contact spring 18 along the guide contour 17 This can be an electrical contact of the contact spring 18 with the two contact elements 15 . 16 respectively.

1 shows the contact spring 18 in different positions. In the drawing of 1 shown on the far left, is the operating lever 10 in the exhibition 11 and the contact spring 18 . 18 ' contacted with the second contact element 16 , In this contacting the contact spring 18 . 18 ' with the second contact element 16 becomes one of the ignition device 32 associated circuit closed, causing the internal combustion engine 30 is switched off, since no more spark can be generated.

In the 1 shown on the far right is the control lever 10 turned so that the contact spring 18 . 18 ' in the choke position 13 located. In this position there is no contacting of the contact spring 18 . 18 ' with any of the contact elements 15 . 16 , The first contact element 15 is not directly in the choke position 13 but it is located between the commissioning position 12 and the choke position 13 of the operating lever 10 , so when moving the control lever 10 from the commissioning position 12 in the choke position 13 a contact of the contact spring 18 . 18 '' with the first contact element 15 as it is in 1 is shown takes place. A contact of the contact spring 18 . 18 '' with the first contact element 15 takes place before reaching the choke position 13 , wherein at a contacting of the contact spring 18 . 18 '' with the first contact element 15 one of the ignition device 32 associated circuit is closed, causing the internal combustion engine 30 is also switched off, since a spark can no longer be generated. This can be achieved that before reaching the choke position 13 the internal combustion engine 30 already turned off and the internal combustion engine 30 so that it is not turned off by too much fuel in the combustion chamber of the internal combustion engine 30 located.

As in 1 can be seen, is the second contact element 16 to the first contact element 15 not parallel, but slightly tilted.

The guide contour 17 on the outside of the mode selector 14 has a first survey 19 , a second survey 20 and one between the first survey 19 and the second survey 20 trained valley 21 on. In the area of the first survey 19 is the off position 11 , In the area of the second survey 20 is the choke position 13 and in the valley 21 is the startup position 12 , With a movement of the operating lever 10 starting from the commissioning position 12 into the exhibition 11 or in the choke position 13 Therefore, the user must apply a certain operating force to the force or voltage of the contact spring 18 the contact spring 18 from the valley 21 to the respective survey 19 . 20 respectively.

At a transfer of the operating lever 10 from the commissioning position 12 into the exhibition 11 becomes the operating lever 10 or the mode selector 14 rotated counterclockwise and with a movement of the operating lever 10 from the commissioning position 12 in the choke position 13 becomes the operating lever 10 or the mode selector 14 turned clockwise.

2 shows a configuration which is similar to the in 1 shown embodiment, but in this case the guide contour 17 not just a guide 22 , but in addition a second guide track 23 having. With a movement of the operating lever 10 from the commissioning position 12 in the choke position 13 becomes the contact spring 18 along the first guide track 22 guided, wherein a contact of the contact spring 18 with the first contact element 15 before reaching the choke position 13 he follows. With a movement of the operating lever 10 from the choke position 13 back to the commissioning position 12 becomes the contact spring 18 however, sections along the second guide track 23 guided such that no contact of the contact spring 18 with the first contact element 15 he follows.

At the in 2 The embodiment shown is the guide contour 17 designed such that the guide contour 17 the first contact element 15 at least partially overlaps by the guide contour 17 in the region of the first contact element 15 a ramp 24 having. The ramp 24 partially covers a part of the contact element 15 which of the guide contour 17 protrudes. The ramp 24 is formed such that upon movement of the contact spring 18 from the commissioning position 12 in the choke position 13 the contact spring 18 , as in 2 With 18 '' shown against one end of the ramp 24 abuts and with the first contact element 15 contacted and then in a further movement in the direction of the choke position 13 on the ramp 24 is pushed and further towards the choke position 13 is moved until the contact spring 18 in the choke position 13 is positioned as with 18 ' is shown. With a movement of the operating lever 10 back from the choke position 13 in the commissioning position, the contact spring moves 18 first along the ramp 24 and at the end of the ramp 24 the contact spring jumps 18 due to the arcuate curvature of the ramp 24 over the first contact element 15 over it, making the second route 23 is formed, so that during this movement of the operating lever 10 no contacting of the contact spring 18 with the first contact element 15 is trained.

3 shows an embodiment in which the first contact element 15 not on the mode selector 14 itself is arranged, but at which the first contact element 15 on a remote to the mode selector 14 arranged component 27 , such as an in 7 shown intake manifold 34 , is arranged.

At the in 3 shown embodiment is in a leadership of the contact spring 18 along the guide contour 17 on the outside of the mode selector 14 the contact spring 18 before reaching the choke position 13 moved by the amount X upwards, so that a contact of the contact spring 18 with the remote to the mode selector 14 arranged first contact element 15 can be done. Before reaching the choke position 13 is due to the further movement of the contact spring 18 along the guide contour 17 the contact with the first contact element 15 released again, leaving in the choke position 13 itself the contact spring 18 less than the dimension X is shifted upward and a contact of the contact spring 18 with the first contact element 15 can not be done anymore.

At the in 3 As shown embodiment, a contacting of the contact spring 18 with the first contact element 15 also in the off position 11 of the operating lever 10 , as well as with a movement of the operating lever 10 from the commissioning position 12 into the exhibition 11 the contact spring 18 while guiding along the guide contour 17 is moved up by the dimension X, as in 3 is shown. A second contact element 16 is therefore not necessary in this embodiment.

In the 4 shown embodiment has a remote to the mode selector 14 arranged first contact element 15 and one directly at the mode selector 14 arranged second contact element 16 on. Similar to the in 3 shown embodiment is here at a leadership of the contact spring 18 along the guide contour 17 on the outside of the mode selector 14 the contact spring 18 before reaching the choke position 13 moved by the amount X upwards, so that a contact of the contact spring 18 with the remote to the mode selector 14 arranged first contact element 15 can be done. In a guide of the contact spring 18 starting from the commissioning position 12 into the exhibition 11 becomes the contact spring 18 on the other hand, it does not move upwards by the measure X, so that in the off position 11 the contact spring 18 not even with the first contact element 15 can contact. In the exhibition 11 contacts the contact spring 18 however, with the directly on the mode selector 14 arranged second contact element 16 ,

At the in 4 The embodiment shown is the second survey 20 relative to the sink 21 higher than the first survey 19 formed so that the applied by a user operating force in a transfer of the operating lever 10 starting from the commissioning position 12 in the choke position 13 is greater than that when transferring the operating lever 10 from the commissioning position 12 into the exhibition 11 ,

At the in 6 and 7 again shown embodiment is only one contact element 15 provided, by means of which the contact spring 18 either between the commissioning position 12 and the choke position 13 as well as immediately in the off position 11 contacted.

The contact spring 18 is in 6 and 7 in the commissioning position 12 , the choke position 13 and before reaching the choke position 13 wherein it can be seen that during a movement of the operating lever 10 from the commissioning position 12 in the choke position 13 a touch of the contact spring 18 with the contact element 15 only in the intermediate position between the start-up position 12 and the choke position 13 done, but not in the startup position 12 or the choke position 13 himself. The contact element 15 is removed here to the mode selector 14 arranged.

The guide contour 17 the in 6 and 7 shown embodiment has between the start-up position 12 and the choke position 13 a first guide track 22 and a second guide track 23 on. During a movement of the contact spring 18 along the first guide track 22 and thus a movement of the operating lever 10 from the commissioning position 12 in the choke position 13 becomes the contact spring 18 before reaching the choke position 13 shifted by the dimension X upwards, so that a contact of the contact spring 18 with the contact element 15 he follows. With a movement of the operating lever 10 back from the choke position 13 into the commissioning position 12 becomes the contact spring 18 along the second route 23 shifted, in which the contact spring 18 is not raised by the amount X and thus it does not lead to a contact of the contact spring 18 with the contact element 15 comes. Stopping or going out of the internal combustion engine 30 when switching from the choke position 13 into the commissioning position 12 can be prevented.

To start from the first guide 22 on the second leading track 23 to get to, the contact spring 18 here by the dimension Y transverse to the longitudinal direction 26 the leadership contour 17 postponed. By the transverse displacement by the dimension Y can be prevented that the contact spring 18 when moving the operating lever 10 from the commissioning position 12 in the choke position 13 not undesirable in the field of commissioning 12 on the second leading track 23 jumps, which would mean that with a movement of the control lever 10 from the commissioning position 12 in the choke position 13 no contact between the contact spring 18 and the contact element 15 would be trained. The first guide track 22 and the second guide track 23 form here between the commissioning position 12 and the choke position 13 together a loop form.

The invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the solutions shown even in fundamentally different versions. All features and / or advantages resulting from the claims, the description or the drawings, including design details, spatial arrangements and method steps, can be essential to the invention, both individually and in the most diverse combinations.

LIST OF REFERENCE NUMBERS

100

Engine working machine

10

operating lever

11

Exhibition

12

In-operation position

13

Choke position

14

Operating modes Plate

15

(First) contact element

16

Second contact element

17

guide contour

18, 18 ', 18' ', 18' ''

contact spring

19

First survey

20

Second survey

21

depression

22

First route

23

Second route

24

ramp

25

axis of rotation

26

longitudinal direction

27

Remotely located component

30

internal combustion engine

31

carburettor

32

ignition device

33

screw

34

intake manifold

35

electric wire

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102009011684 A1 [0002]

Claims (13)

Hand-held engine tool ( 100 ), with an internal combustion engine ( 30 ), which an ignition device ( 32 ), and with a control lever ( 10 ), by means of which the internal combustion engine ( 30 ) is adjustable in different operating modes, wherein for setting the various operating modes, a contact spring ( 18 . 18 ' . 18 '' . 18 ' ) along one on an outer side of an operating lever ( 10 ) arranged operating mode ( 14 ) formed guide contour ( 17 ) when moving the operating lever ( 10 ) in an off position ( 11 ), a commissioning position ( 12 ) and a choke position ( 13 ) of the internal combustion engine ( 30 ) is feasible, characterized in that the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) along the guide contour ( 17 ) is guided such that upon movement of the operating lever ( 10 ) from the startup position ( 12 ) in the choke position ( 13 ) the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) before reaching the choke position ( 13 ) with a contact element ( 15 ), so that one of the ignition device ( 32 ) associated circuit is closed. Hand-held engine tool ( 100 ) according to claim 1, characterized in that the contact element ( 15 ) on the mode selector ( 14 ) is arranged. Hand-held engine tool ( 100 ) according to claim 1, characterized in that the contact element ( 15 ) on one of the mode selector ( 14 ) remotely located component ( 27 ) is positioned. Hand-held engine tool ( 100 ) according to claim 3, characterized in that the remotely located component ( 27 ) an intake manifold ( 34 ). Hand-held engine tool ( 100 ) According to one of claims 1 to 4, characterized in that the guide contour ( 17 ) a first survey ( 19 ), a second survey ( 20 ) and one between the first survey ( 19 ) and the second survey ( 20 ) formed sink ( 21 ), wherein the off position ( 11 ) at the first survey ( 19 ), the choke position ( 13 ) at the second survey ( 20 ) and the commissioning position ( 12 ) in the sink ( 21 ) are formed. Hand-held engine tool ( 100 ) according to claim 5, characterized in that the first survey ( 19 ) one to the second survey ( 20 ) has different heights. Hand-held engine tool ( 100 ) according to one of claims 1 to 6, characterized in that the guide contour ( 17 ) between the startup position ( 12 ) and the choke position ( 13 ) a first guide track ( 22 ) and a second guide route ( 23 ), wherein upon movement of the operating lever ( 10 ) from the startup position ( 12 ) in the choke position ( 13 ) the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) along the first guide track ( 22 ) is guided and with the contact element ( 15 ), and wherein upon movement of the operating lever ( 10 ) from the choke position ( 13 ) into the commissioning position ( 12 ) the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) along the second guide track ( 23 ) without a contact with the contact element ( 15 ) is guided. Hand-held engine tool ( 100 ) according to claim 7, characterized in that for the formation of the second guide track ( 23 ) the guiding contour ( 17 ) is designed such that the guide contour ( 17 ) the contact element ( 15 ) at least partially overlaps. Hand-held engine tool ( 100 ) according to claim 8, characterized in that the overlapping of the guide contour ( 17 ) by a on the guide contour ( 17 ) trained ramp ( 24 ) is trained. Hand-held engine tool ( 100 ) according to one of claims 7 to 9, characterized in that the second guide track ( 23 ) laterally offset to the first guide track ( 23 ) is formed, so that when changing the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) from the first guide track ( 22 ) on the second guide track ( 23 ) the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) transverse to the longitudinal direction ( 26 ) of the guide contour ( 17 ) is moved. Hand-held engine tool ( 100 ) according to 3 to 10, characterized in that the contact element ( 15 ) at one of the mode selector ( 14 ) is arranged remotely located component that the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) additionally in the off position ( 11 ) of the internal combustion engine ( 30 ) with the contact element ( 15 ) contacted. Hand-held engine tool ( 100 ) according to one of claims 1 to 10, characterized in that a second contact element ( 16 ) is provided, by means of which the contact spring ( 18 . 18 ' . 18 '' . 18 ' ) in the exhibition ( 11 ) of the internal combustion engine ( 30 ) contacted. Hand-held engine tool ( 100 ) according to claim 12, characterized in that the second contact element ( 16 ) on the mode selector ( 14 ) is arranged.

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