EP3315262A1 - Hand-guided appliance with a combustion engine - Google Patents

Abstract

A hand-held implement with an internal combustion engine (11) has a starting device (21) with an operating position (22), an off position (23) and at least one starting position (24, 25). The starting device (21) has an actuating element (10) to be actuated by the operator, which is in operative connection via a coupling element (20) with a choke operating lever (19). The operative connection between the actuating element (10) and the choke actuating lever (19) has a relative movement device (28) which permits a relative movement of the actuating element (10) relative to the choke actuating lever (19) in at least one position of a choke element (16). The relative movement device (28) comprises a holding device (29), which comprises a guide contour (35) held stationary on a carburetor housing (14). The guide contour (35) holds the actuating element (10) in at least one starting position (26, 27) of the choke element (16) in the starting position (24) and prevents relative movement of the actuating element (10) relative to the choke actuating lever (19) from the starting position (FIG. 24) in the operating position (22).

Description

The invention relates to a hand-held implement of the type specified in the preamble of claim 1.

From the DE 10 2010 009 05 A1 discloses a carburetor assembly for a combustion engine in a hand-held implement having a starting device. The starting device comprises an operator-actuated mode selector, which is connected via a coupling rod with a choke lever of a choke element. The arrangement is such that each position of the mode selector is assigned a position of the choke operating lever and thus a position of the starting device. Based on the position of the mode selector, the operator can therefore easily recognize in which position the starting device is located.

In the operating position and the off position, the choke element is usually in the same position. Accordingly, between the operating position and the off position of the actuating element, movement of the actuating element must be possible without the choke operating lever moving. This is done in known systems by positioning the levers to each other.

The invention has for its object to provide a hand-held implement of the generic type, which allows a flexible arrangement of the actuator. This object is achieved by a hand-held implement with the features of claim 1.

In order to enable a movement of the actuating element, for example a mode selector, relative to the choke actuating lever, it is provided that the operative connection between the actuating element and the choke actuating lever has a relative movement device. The relative movement device allows, in at least one position of the choke element, a relative movement of the actuation element relative to the choke actuation lever. By the relative movement means, the position of the pivot axis of the choke actuating lever need not be chosen so that the actuator can move without significant movement of a coupling point on the choke control lever between the operating position and the off position. Rather, the position of the choke lever can be selected largely freely. The relative movement of the actuating element relative to the choke actuating lever is made possible via the relative movement device. The relative movement device allows, in particular, a relative movement of the coupling element relative to the choke actuating lever and with respect to the choke element.

However, it is desirable that the operator can still see from the position of the actuator in which position the starting device is located. To ensure this, a holding device is provided which comprises a stationary on the carburetor housing held guide contour. The guide contour holds in at least one starting position of the choke element, the actuating element in the starting position and prevents a relative movement of the actuating element relative to the choke actuating lever from the starting position to the operating position.

The holding device thereby simultaneously ensures that the position of the actuating element is coupled to the position of the choke actuating lever. In at least one starting position, preferably in a hot start position, the actuating element can due to the holding device does not move from the starting position to the operating position with respect to the choke operating lever. This ensures that the actuating element remains in the position for the assigned starting position when the starting device is in the starting position, and can not adjust with respect to the choke operating lever with the aid of the relative movement device. A movement of the actuating element relative to the choke operating lever could lead to the choke operating lever being in a starting position, but the actuating element is no longer in the assigned starting position but, for example, in the operating position. This is easily avoided by the holding device.

Advantageously, the relative movement device allows in the operating position of the choke element relative movement of the actuating element of the starting device relative to the choke actuating lever, so that the choke operating lever is not moved when the actuating element between the operating position and the off position is adjusted. Advantageously, the holding device locks the relative movement device in the starting position of the actuating element. The holding device causes a movement of the actuating element from the operating position into the at least one starting position causes a movement of the choke actuating lever. The movement of the choke actuating lever effects an adjustment of the choke element into the assigned starting position of the choke element. The holding device can lock the relative movement device and / or hold the choke element in at least one starting position. Advantageously, the Chokeelemerlt always moves with the choke lever.

The operating position of the choke element is in particular the position in which the choke element releases the cross section of the intake duct. A starting position of the choke element is a position in which the choke element partially or almost completely closes the cross section of the intake duct.

Advantageously, the relative movement device comprises a slot in which a guide element engages. In the slot, the guide element moves during the adjustment of the actuating element from the operating position to the off position from a first position to a second position. Due to the movement of the guide element in the elongated hole, a relative movement of the guide element relative to the choke actuating lever can be made possible in a simple manner. As a result of the movement of the guide element in the oblong hole, a relative movement of the actuating element relative to the choke actuating lever can thus also be made possible. During the adjustment of the actuating element from the operating position into at least one starting position, the guide element preferably moves from the first position into at least one third position.

Advantageously, the slot has a first portion and a second portion, which enclose an angle of advantageously more than 45 ° with each other and are connected to each other via a connection region. The slot has in particular an angled, preferably an approximately L-shaped configuration. Alternatively, a shape deviating from the L-shape of the slot may be advantageous. In particular, a straight slot can be provided. The choke actuating lever and a throttle lever, which is connected to a throttle element arranged in the intake passage, engage in locking at least one starting position advantageously in staggered planes with each other.

In the second position, the guide element is advantageously in the first section. In the second position, the actuating element is arranged in the off position. In the L-shaped configuration of the oblong hole, the first section is preferably the longer leg of the L. In the third position, the guide element is advantageously located in the second section. In the third position, the actuator is in the starting position. In L-shaped design of the elongated hole, the second portion is preferably the short leg of the L. Particularly preferably, the guide element is in the first position, ie in the operating position of the starting device, in Connection area. In the first position, the actuator is in the operating position. From the connection region, the guide element can be adjusted in the off position in the first section and in an adjustment in a start position in the second section in an adjustment.

The guide contour advantageously closes at least a portion of the oblong hole in the at least one starting position for the guide element. The guide contour thus prevents in a simple manner that the guide element in a section, in particular in the off-position associated portion, can be adjusted. In an adjustment of the actuating element in the starting position, it is ensured that the choke actuating lever is likewise adjusted to the assigned starting position. If the choke operating lever is in a start position, the guide contour prevents the guide element from being displaced into the section of the slot assigned to the off position and in particular also into the section of the slot assigned to the operating position. This ensures that the actuating element is in the position assigned to the starting position and the operator can clearly deduce the position of the starting device based on the position of the actuating element.

Preferably, the guide contour is formed on a control opening into which the guide member projects. In the operating position of the choke element, the control opening advantageously completely covers the oblong hole in the movement region of the coupling element. As a result, the entire slot for the guide element is accessible, and the guide element can be adjusted both in the off position and in the at least one starting position. The range of movement of the coupling element is the region of the oblong hole in which the coupling element can move. The guide contour is advantageously formed on a component which is firmly connected to a carburetor housing of the carburetor. It may be advantageous that the guide contour is formed on the carburetor housing itself. However, a simple design results from the formation of the guide contour on a separate component. The separate component is preferably made of plastic. This results in a simple structure and a simple production.

Advantageously, the guide element is formed on the coupling element and the slot on the choke actuating lever. However, an embodiment of the guide element on the choke actuating lever and a design of the oblong hole on the coupling element may also be advantageous. Preferably, the coupling element is designed as a wire bow. The guide element is advantageously formed by an angled end of the wire bracket. Particularly preferably, the choke actuating lever is non-rotatably connected to the choke element. For tolerance compensation, however, a sprung mounting of the choke actuating lever relative to the choke element can be provided, which allows a relative movement of the choke actuating lever relative to the choke element in a limited angular range. The choke actuating lever and a control part, on which the guide contour is formed, advantageously form a slotted guide for the guide element.

Fig. 1

eine schematische Seitenansicht einer Motorsäge,

Fig. 2

den Vergaser und das Betätigungselement der Motorsäge aus Fig. 1 in perspektivischer Darstellung in Betriebsstellung,

Fig. 3

die Anordnung aus Fig. 2 in Seitenansicht,

Fig. 4

eine Seitenansicht des Chokebetätigungshebels der Vergaseranordnung,

Fig. 5

eine Seitenansicht eines Steuerteils der Anordnung aus den Fig. 3 und 4,

Fig. 6

eine teilweise Explosionsdarstellung des Vergasers,

Fig. 7

eine perspektivische Darstellung des Vergasers und des Betätigungselements in einer Aus-Position,

Fig. 8

die Anordnung aus Fig. 7 in Seitenansicht,

Fig. 9

eine perspektivische Darstellung der Vergaseranordnung in einer zweiten Startstellung,

Fig. 10

die Anordnung aus Fig. 9 in Seitenansicht,

Fig. 11

die Vergaseranordnung in perspektivischer Darstellung in einer ersten Startstellung,

Fig. 12

die Anordnung aus Fig. 11 in Seitenansicht,

Fig. 13

ein Ausführungsbeispiel der Vergaseranordnung in einer ersten Startstellung,

Fig. 14

eine Seitenansicht des Chokebetätigungshebels der Vergaseranordnung aus Fig. 13 in Seitenansicht mit schematischer Darstellung der Positionen des Führungselements in den unterschiedlichen Positionen.

Embodiments of the invention are explained below with reference to the drawing. Show it:

Fig. 1

a schematic side view of a power saw,

Fig. 2

the carburetor and the actuator of the chainsaw Fig. 1 in perspective in operating position,

Fig. 3

the arrangement Fig. 2 in side view,

Fig. 4

a side view of the choke actuating lever of the carburetor assembly,

Fig. 5

a side view of a control part of the arrangement of the 3 and 4 .

Fig. 6

a partially exploded view of the carburetor,

Fig. 7

a perspective view of the carburetor and the actuating element in an off position,

Fig. 8

the arrangement Fig. 7 in side view,

Fig. 9

a perspective view of the carburetor in a second starting position,

Fig. 10

the arrangement Fig. 9 in side view,

Fig. 11

the carburettor arrangement in a perspective view in a first starting position,

Fig. 12

the arrangement Fig. 11 in side view,

Fig. 13

An embodiment of the carburetor in a first starting position,

Fig. 14

a side view of the choke control lever of the carburetor assembly Fig. 13 in side view with a schematic representation of the positions of the guide element in the different positions.

Fig. 1 shows an embodiment of a hand-held implement a power saw 1. The hand-held implement, however, may also be a cut-off, a brushcutter, a blower, a lawnmower or the like. The power saw 1 has a housing 2 in which an internal combustion engine 11 is arranged. To guide the power saw 1 is a rear handle 3, which is connected via not shown vibration damping elements with the housing 2, and a handle tube 4, which engages over the housing 2. At the rear handle 3 are a throttle lever 8 and a throttle lock. 9 pivoted. Adjacent to the rear handle 3, an actuating element 10 is also provided, which is designed in the embodiment as a mode selector and which can be pivoted into different positions, as shown schematically by the arrow 71. On the housing 2, a guide rail 5 is arranged, on which a saw chain 6 is mounted circumferentially. The saw chain 6 is the tool of the power saw 1 and is driven by the internal combustion engine 11 to the guide rail 5 circumferentially. The internal combustion engine 11 has a carburetor 13, which serves for the supply of fuel / air mixture and which is connected via an intake passage 12 with the engine 11. The internal combustion engine 11 is a single-cylinder engine, preferably a mixture-lubricated engine. In the exemplary embodiment, the internal combustion engine 11 is a mixture-lubricated two-stroke engine. However, the internal combustion engine may also be a four-stroke engine, in particular a mixture-lubricated four-stroke engine. On the housing 2, a hand guard 7 is pivotally mounted, which extends to the saw chain 6 facing side of the handle tube 4 and which is advantageous for triggering a brake device, not shown, for the saw chain 6.

Fig. 2 shows the design of the carburetor 13 in detail. The carburetor 13 has a carburetor housing 14 in which an intake passage section 15 is formed. In the intake passage section 15, a choke element 16, in the exemplary embodiment a choke flap, is pivotably mounted with a choke shaft 17 about an axis of rotation 18. Fig. 2 shows the choke element 16 in an operating position 41, in which the choke element 16, the flow cross section in the intake passage 15 largely releases. At the choke shaft 17, a spring 40 is arranged, which is formed in the embodiment as a torsion spring, and the choke element 16 in the direction of the in Fig. 2 shown operating position 41 biased. On the outside of the carburetor housing 14, a choke actuating lever 19 is arranged on the choke shaft 17. In the embodiment, the choke lever 19 is rotatably connected to the choke shaft 17. For tolerance compensation, however, can also be a connection between the choke control lever 19th and the choke shaft 17 may be provided, which allows a limited relative movement between the choke operating lever 19 and the choke shaft 17.

At Chokebetätigungshebel 19 is a coupling element 20, in the embodiment, a wire hanger mounted. Another design of the coupling element 20 may be advantageous. The second end of the coupling element 20 is mounted on the actuating element 10. The actuating element 10 is pivotally mounted about a pivot axis 42. The actuating element 10 has an actuating portion 68, which advantageously consists of the housing 2 of the power saw 1 (FIG. Fig. 1 protrudes. The coupling element 20 is advantageously fixed to a region of the actuating element 10, which is arranged on the side opposite the actuating portion 68 of the pivot axis 42.

To start the internal combustion engine 11, the carburetor 13 is moved to a starting position. For this purpose, a starting device 21 is provided on the carburetor 13. The starting device 21 comprises the actuating element 10, the coupling element 20, the choke actuating lever 19, the choke shaft 17, the choke element 16 and a throttle lever 48 which is non-rotatably connected to a throttle element 52 mounted downstream of the choke element 16 in the intake channel section 15 (FIG. Fig. 3 ) connected is. As Fig. 2 Also shows, the coupling element 20 is mounted on the choke control lever 19 in a slot 30. The slot 30 is formed as part of a relative movement device 28. In Fig. 2 is the starting device 21 in an operating position 22nd

As Fig. 3 shows, the coupling element 20 is in the operating position 22 of the starting device 21 in a first position 32 in the slot 30. In the first position 32, the coupling element 20 in the slot 30 in both directions, ie in a first section 43 or a second section 44, move. The sections 43 and 44 are in Fig. 4 are shown and will be described in more detail below. In Fig. 3 also the throttle element 52 is shown schematically. In the exemplary embodiment, the throttle element 52 is a throttle valve. The throttle element 52 is pivotally mounted about an axis of rotation 65.

In the operating position 22, the throttle lever 48 and the choke lever 19 are in a blocking position 49. In the blocking position 49 blocks a blocking portion 50 of the throttle lever 48 a blocking portion 51 of the choke actuating lever 19. The choke 16 can not in the direction of arrow 60, ie in a Closing direction of the choke element 16, to be pivoted, without first the throttle lever 48 is pivoted out of the range of movement of the choke actuating lever 19. For pivoting the choke actuating lever 19 in the direction of the arrow 60, that is to say for inserting a starting position, the throttle lever 8 (FIG. Fig. 1 ) are pressed by the operator and thereby the throttle lever 48 are pivoted out of the range of motion. Inserting a starting position without prior actuation of the throttle lever 8 is thereby avoided. In the exemplary embodiment of the throttle lever 8 acts on a gas actuating rod 71. The gas actuation rod 71 acts to actuate the throttle element via an intermediate lever 72 to a not shown, rotatably connected to the throttle element 52 operating lever.

In Fig. 3 are schematically shown the other possible positions of the actuating element 10. By pivoting the actuating portion 68 in the direction of the arrow 57, in Fig. 3 So up, the starting device 21 is moved to an off position 23. Advantageously, the off position 23 is designed as a button. In the off position 23, an ignition of the internal combustion engine 11 is advantageously short-circuited, so that the internal combustion engine 11 is switched off. However, the actuator 10 is advantageously mounted sprung in the direction of the operating position 22 of the starting device 21 and returns after releasing the actuator 10 by the operator back to the operating position 22. In an alternative design can be advantageously provided that the actuator 10 is locked in the off position 23 and must be adjusted by the operator back to the operating position 22.

By pivoting the actuating element 10 in the direction of the arrow 58, in Fig. 3 So down, the operator can the starting device 21 in a second starting position 25, in the embodiment, a cold start position, adjust. To adjust the starting device 21 into a first starting position 24, in particular a warm start position, the operator can pivot the actuating element 22 back in the direction of the arrow 57. To adjust back to the operating position 22, the operator can actuate the throttle lever 8, whereby a locking described in more detail below between the choke control lever 19 and the throttle lever 48 is released.

Fig. 4 shows the configuration of the choke operating lever 19 in detail. The slot 30 has the first portion 43 and the second portion 44. The first portion 34 and the second portion 44 are connected to each other via a connecting portion 45. The first section 43 has a longitudinal central axis 46. The second section 44 has a longitudinal central axis 47. The longitudinal center axes 46 and 47 close to each other at an angle α, which is advantageously greater than 45 °. In the exemplary embodiment, the angle α is about 90 °. In the exemplary embodiment, the portion 43 is formed longer than the second portion 44. For the slot 30 results in the embodiment, an approximately L-shaped configuration. The slot 30 forms in the embodiment, a relative movement means 28. The relative movement means 28 allows a relative movement of the coupling element 20 relative to the slot 30. In Fig. 14 a variant for the slot 30 is shown. As Fig. 4 1, the blocking portion 51 is formed on a nose 69 of the choke operating lever 19. On the opposite side of the nose 69, a contact contour 62 is formed, whose function will be described in more detail below.

On the carburetor housing 14 is how Fig. 3 shows a control part 54 set. In the exemplary embodiment, the control part 54 is fixed to the carburetor housing 14 via a fastening screw 56. The fastening screw 56 protrudes through a fastening opening 55 of the control part 54, which in Fig. 5 is shown. Alternatively, the control part 54 may be integral with the carburetor housing 14 (FIG. Fig. 3 ) be formed. As Fig. 5 Also shows, the control part 54 has a control opening 34 which has an approximately C-shaped, approximately arcuate course in the embodiment. The coupling element 20 (FIG. Fig. 3 protrudes both through the elongated hole 30 and through the control opening 34 located between the choke actuating lever 19 and the carburetor housing 14. The slot 30 and the control opening 34 thereby form a guide slot for a guide element 31 formed on the coupling element 20. The guide element 31 is in Fig. 6 shown. The guide element 31 projects through the choke actuating lever 19 and the control opening 34 in the exemplary embodiment.

As Fig. 5 and Fig. 6 show, at the control opening 34 a Führungsungsköntur 35 is formed, which forms a holding device 29. The guide contour 35 is held in place on the carburetor housing 14 via the fastening screw 56. As a result, the guide contour 35 can not move relative to the carburetor housing 14 during operation. It may also be advantageous to form the guide contour 35 directly on the carburetor housing 14, ie in one piece with the carburetor housing 14. In order to achieve a better guidance for the guide element 31, the holding device 29 is formed on a survey 38 on the control part 54. In the exemplary embodiment, the elevation 38 has a recess 39, in which the elevation 38 is formed less high. In the area of the recess 39, the survey 38 can be completely eliminated. The recess 39 is arranged in the region in which the throttle lever 48 is in the operating position 22 ( Fig. 3 ). The recess 39 prevents even in unfavorable tolerance position that the throttle lever 48 ( Fig. 3 ) can come into contact with the control part 54.

As Fig. 6 shows, the throttle lever 48 is fixed against rotation on a throttle shaft 53. On the throttle shaft 53, the throttle element 52, in the embodiment, a throttle valve fixed. At the opposite end of the throttle lever 48, the throttle shaft 53, a throttle actuating lever 59 is arranged. At the throttle actuation lever 59 engages a transmission device which controls the actuation movement of the throttle lever 8 (FIG. Fig. 1 ) transmits to the throttle actuating lever 59 and thus to the throttle element 52. As Fig. 6 Also shows, has the coupling element 20 of the embodiment of the guide member 31 adjacent a Sicherurigsabschnitt 67, in which the coupling element 20 is angled relative to the guide member 31. The security section 67 engages in operation behind the control part 54 and is located between the control part 54 and the carburetor housing 14. Thus, the coupling element 20 is held on the control part 54.

The FIGS. 7 and 8 show the arrangement of the carburetor 13 ( Fig. 2 In the off position 23, the guide element 31 is located in a second position 33. In the second position 33, the guide element 31 is arranged on the end of the first section 43 of the elongated hole 30 facing away from the connection region 45. On the actuating element 10, an actuating cam 66 is formed which, in the off position 23, advantageously short-circuits an ignition device of the internal combustion engine 11. When adjusting the actuating element 10 from the operating position 22 to the off position 23, the guide member 31 moves in the slot 30. The slot 30 is aligned so that when adjusting the actuating element 10 from the operating position 22 in the direction of the output Position 23 gives no adjustment of the choke operating lever 19. Both in the operating position 22 and in the off position 23 of the actuating element 10, the choke element 16 is in its operating position 41. The choke element 16 releases the flow cross section of the intake channel section 15 for the most part.

As Fig. 8 shows, are the slot 30 and the control port 34 in the embodiment in off position 23 in overlap. The control opening 34 covers the range of movement of the coupling element 20 in the slot 30 completely. The control opening 34 does not block any area of the oblong hole 30 into which the coupling element 20 can move. From the into the FIGS. 7 and 8 shown off position 23, the actuator 10 can thus be moved back into the operating position 22 and from there further preferably in the first starting position 24, without the movement of the coupling element 20 is obstructed in the slot 30 of the guide contour 35. Also, the region of the elongated hole 30, in which the coupling element 20 is located when the actuating element 10 is in the second starting position 25, is not shut off. The movement of the choke actuating lever 19 from the operating position 22 into the first starting position 24 is blocked only by the blocking portion 50 of the throttle lever 48. In order to pivot the throttle lever 48 out of the range of motion of the choke control lever 19, the operator must operate the throttle 8 and accelerate. Thereby, the throttle lever 48 is pivoted in the direction of the arrow 61, and the throttle valve 52 is opened.

The FIGS. 9 and 10 In order to adjust the starting device 21 from the operating position 22 to the second starting position 25, which is advantageously a cold start position, the actuating portion 68 is moved in the direction of the arrow 58, as in FIG Fig. 10 is shown schematically. The second starting position 25 is engaged by the throttle lever 8 is actuated, then the actuator 10 is pivoted and then the throttle 8 is released again. As a result, the throttle lever 48 comes with a portion 64 to rest on the choke control lever 19 and holds the choke lever 19 in the appropriate position.

In the second starting position 25, the region 64 of the throttle lever 48 bears against a contact contour 63 on the outer circumference of the choke actuating lever 19. The throttle lever 48 holds the choke operating lever 19 in the second starting position 25 Fig. 10 schematically shows, in the second starting position 25, the throttle element 52 is turned on and reduces the free flow cross section in the intake passage 15. As Fig. 9 shows, the choke element 16 is in a second starting position 27, in which the choke element 16 largely closes the cross section of the intake passage section 15. As the FIGS. 9 to 12 show, the guide member 31 is in the second starting position 25 within the slot 30 approximately in the same position as in the first starting position 24. Preferably, in the first start position 24 locks the holding device 29, the connecting portion 45 and the first portion 43 of the elongated hole 30, so that the guide element 31 can not get out of the second section 44 without a movement of the choke operating lever 19.

The FIGS. 11 and 12 show the arrangement of the carburetor 13 in the first start position 24, in the embodiment in a hot start position. By pivoting the actuating element 10 out of the second starting position 25 in the direction of the arrow 57 (FIG. Fig. 10 ), the arrangement can be placed in the first starting position 24. A direct insertion of the first starting position 24 without prior insertion of the second starting position 25 is not possible in the embodiment. However, this can also be provided. As the FIGS. 11 and 12 show, the choke valve 16 has been pivoted and is in a first starting position 26. In the first start position 26, the choke element 16 closes the flow cross-section in the intake passage 15 partially.

As Fig. 12 shows, in the first start position 24 of the region 64 of the throttle lever 48 to the first abutment contour 62 of the choke actuating lever 19 at. The guide member 31 is located in the second portion 44 of the slot 30. Wie Fig. 12 shows, the control port 34 is only partially in overlap with the slot 30. The connecting portion 45 is largely hidden by the control part 54. The guide contour 35 prevents the guide element 31 from entering the connection region 45 and from there into the first section 43 of the oblong hole 30, as long as the choke actuation lever 19 is arranged in the first start position 24. This prevents that the actuating element 10 can be adjusted to a position which is assigned to the operating position 22 or the off position 23. The guide contour 35 holds the actuating element 10 in the position assigned to the first starting position 24. The guide contour 35 prevents a relative movement of the actuating element 10 relative to the choke actuating lever 19 from the first starting position 24 into the operating position 22. The guide element 31 is located in a third position 36 in the second section 44, which in the exemplary embodiment is approximately in the middle of the second section 44 located. The operator must either release gas to release the first starting position 24, ie the throttle lever 8 (FIG. Fig. 1 ) and pivot, or with an increased force in the direction of the arrow 57 (FIG. Fig. 10 ) against the actuating element 10, so that the area 64 of the throttle lever 48 elastically deformed and the latch between choke control lever 19 and throttle lever 48 is released. The Releasing the first starting position 24 is possible in the embodiment due to the elasticity of the throttle lever 48. The throttle lever 48 is preferably made of plastic. Alternatively, the first starting position 24 could also be achieved by lateral displacement in the direction of the longitudinal axis of the choke shaft 17 (FIG. Fig. 6 ) are solved. For this purpose, the throttle lever 48 and / or the choke operating lever 19 in the direction of the longitudinal axis of the choke shaft 17 (FIG. Fig. 6 ) or tilted sideways.

The FIGS. 13 and 14 show an embodiment of a choke operating lever 19 '. Identical reference characters indicate corresponding elements in both embodiments. The choke operating lever 19 'differs from the choke operating lever 19 in the design of the elongated hole 30. The choke actuating lever 19' has a slot 30 ', which also has a first portion 43, a second portion 44' and a connecting portion 45. The sections 43 and 44 'extend at an angle α' to each other which is greater than 45 °. In the embodiment of the FIGS. 13 and 14 an angle α 'of slightly more than 90 ° is provided. The second portion 44 'has on the side at which the guide member 31 abuts in the first starting position 24, a recess 70, which serves to compensate for tolerances. In the second starting position 25, the guide element 31 is in a fourth position 37, as in Fig. 14 is shown schematically. In the fourth position 37, the guide element 31 is located at the end of the second section 44 'facing away from the connection region 45. In the operating position 22, the guide element 31 is in a first position 32 in the connecting region 45. As in the previous embodiment, the guide element 31 is in the off position 23 in a second position 33, in which the guide member 31 at the end facing away from the connecting portion 45 of the first section 43 is arranged.

Claims (13)

Hand-guided implement with an internal combustion engine (11) and with a carburetor (13) having a carburetor housing (14) in which a Ansaugkanalabschnitt (15) is formed, wherein in the Ansaugkanalabschnitt (15) a pivotally mounted choke element (16) is arranged in which the choke element (16) is in operative connection with a choke actuating lever (19), and wherein a starting device (21) is provided which has an operating position (22), an off position (23) and at least one starting position (24, 25). wherein the starting device (21) comprises an actuating element (10) to be actuated by the operator, wherein the actuating element (10) is operatively connected to the choke actuating lever (19) via a coupling element (20) and when adjusting the actuating element (10) from a Operating position (22) in a start position (24, 25) of the actuating element (10) the choke element (16) in an associated starting position (26, 27) of the choke element (16) adjusted, characterized in that the operative connection between the actuating element (10) and the choke actuating lever (19) has a relative movement device (28) which in at least one position of the choke element (16) a relative movement of the actuating element (10) of the starting device (21) relative to the choke operating lever (19), and in that the relative movement device (28) comprises a holding device (29), wherein the holding device (29) comprises a guide contour (35) held stationary on the carburettor housing (14), which in at least one starting position (26, 27) of the Choke elements (16) holding the actuating element (10) in the starting position (24) and prevents a relative movement of the actuating element (10) relative to the choke actuating lever (19) from the starting position (24) into the operating position (22). Working device according to claim 1,
characterized in that the relative movement device (28) comprises a slot (30), in which a guide element (31) engages and in which the guide element (31) during the adjustment of the actuating element (10) from the operating position (22) in the off Position (23) from a first position (32) moves to a second position (33). Working device according to claim 2,
characterized in that the guide element (31) in the adjustment of the actuating element (10) from the operating position (22) in at least one starting position (24, 25) from the first position (32) in at least one third position (36, 37) emotional. Tool according to claim 2 or 3,
characterized in that the slot (30) has a first portion (43) and a second portion (44) which enclose an angle (α) of more than 45 ° with each other and are interconnected by a connecting portion (45) the guide element (31) is in the second position (33) in the first section (43). Working device according to claim 4,
characterized in that the guide element (31) is in the third position (36, 37) in the second section (44). Tool according to claim 4 or 5,
characterized in that the guide element (31) is in the first position (32) in the connection region (45). Tool according to one of claims 2 to 6,
characterized in that the guide contour (35) closes at least a portion (43) of the oblong hole (30) in the at least one starting position (24, 25) of the actuating element (10) for the guide element (31). Working device according to claim 7,
characterized in that the guide contour (35) is formed on a control opening (34) into which the guide element (31) protrudes. Working device according to claim 8,
characterized in that the control opening (34) in the operating position (41) of the choke element (16) the slot (30) in the range of movement of the coupling element (20) completely covered. Tool according to claim 8 or 9,
characterized in that the guide contour (35) on a fixed to a carburetor housing (14) of the carburetor (13) connected to the component is formed. Tool according to one of claims 2 to 10,
characterized in that the guide element (31) on the coupling element (20) is formed and the slot (30) on the choke actuating lever (19). Tool according to claim 11,
characterized in that the coupling element (20) is designed as a wire bow and the guide element (31) is formed by an angled end of the wire bracket. Tool according to one of claims 1 to 12,
characterized in that the choke actuating lever (19) is non-rotatably connected to the choke element (16).

Images