Granted Patent B2

US 12,515,290 · App. 18/159,752 · Granted Jan 6, 2026

Inventors: Simon Wacker (Waiblingen, DE); Georg Heinzelmann (Winnenden, DE)

Assignee: Andreas Stihl AG & Co. KG

B23Q11/0089B25F5/02B27B17/00

Abstract

Claims (51)

1 . A handheld work apparatus, comprising:

a housing ( 2 );

a drive motor ( 3 ) arranged in the housing ( 2 );

a tool ( 4 ) operatively connected to and driven by the drive motor ( 3 );

a handle portion ( 5 ) formed on the housing ( 2 ),

wherein the handle portion ( 5 ) has a top side ( 6 ) and a bottom side ( 7 ) opposite the top side ( 6 ), the top side ( 6 ) being positioned above the bottom side ( 7 ) when the handheld work apparatus is oriented in an operating orientation;

an actuating element ( 8 ) for actuating the drive motor ( 3 ), the actuating element ( 8 ) being arranged on the bottom side ( 7 ) of the handle portion ( 5 ) and being movable between an inoperative position and an actuated position;

a blocking element ( 9 ) arranged on the top side ( 6 ) of the handle portion ( 5 ),

wherein the blocking element ( 9 ) is movable between a blocking position ( 11 ) and an operating position ( 10 ),

wherein the blocking element ( 9 ) cooperates with the actuating element ( 8 ), and

wherein, in the blocking position ( 11 ), the blocking element ( 9 ) blocks the actuating element ( 8 ) in the inoperative position, and

wherein, in the operating position ( 10 ), the blocking element ( 9 ) releases the actuating element ( 8 ) so that the actuating element ( 8 ) is movable from the inoperative position to the actuated position;

a control circuit ( 17 ) for controlling the drive motor ( 3 ), the control circuit ( 17 ) being arranged in the housing ( 2 ); and

a switch ( 15 ) with a switching element ( 16 ), wherein the blocking element ( 9 ) actuates the switching element ( 16 ) when the blocking element ( 9 ) is in the blocking position ( 11 ),

wherein the switch ( 15 ) is in communication with the control circuit ( 17 ) and, in an activated state, sends a signal to the control circuit ( 17 ),

wherein the control circuit ( 17 ) is designed such that the drive motor ( 3 ) is enabled for operation only when the control circuit ( 17 ) receives the signal of the switch ( 15 ), and

wherein the switch ( 15 ) is arranged in the handle portion ( 5 ) between the blocking element ( 9 ) and the bottom side ( 7 ) of the handle portion ( 5 ) and is oriented such that the switching element ( 16 ) of the switch ( 15 ) faces the bottom side ( 7 ) of the handle portion ( 5 ).

2 . The handheld work apparatus according to claim 1 ,

wherein the blocking element ( 9 ) is pivotable about a first pivot axis ( 13 ) between the blocking position ( 11 ) and the operating position ( 10 ), and

wherein the blocking element ( 9 ) has a first end ( 21 ) which has a maximum end distance (l 1 ), measured radially to the first pivot axis ( 13 ), from the first pivot axis ( 13 ), and

wherein a maximum distance, measured radially to the first pivot axis ( 13 ), between the switch ( 15 ) and the first pivot axis ( 13 ) is less than the maximum end distance (l 1 ).

3 . The handheld work apparatus according to claim 2 ,

wherein the switch ( 15 ) is arranged between the first end ( 21 ) and the first pivot axis ( 13 ) when the blocking element ( 9 ) is in the blocking position ( 11 ).

4 . The handheld work apparatus according to claim 2 ,

wherein the blocking element ( 9 ) has a body ( 20 ) which extends from a first longitudinal side ( 23 ) in a first plane to a second longitudinal side ( 24 ) in a second plane, and

wherein the switching element ( 16 ) of the switch ( 15 ) is arranged between the first plane and the second plane.

5 . The handheld work apparatus according to claim 4 ,

wherein the body ( 20 ) of the blocking element ( 9 ) has a first recess ( 27 ), wherein the switch ( 15 ) is arranged in the first recess ( 27 ) when the blocking element ( 9 ) is in the operating position ( 10 ).

6 . The handheld work apparatus according to claim 2 ,

wherein the switching element ( 16 ) of the switch ( 15 ) has a distance (m 1 ) from the first pivot axis ( 13 ) of the blocking element ( 9 ) which is less than 80% of the maximum end distance (l 1 ).

7 . The handheld work apparatus according to claim 1 ,

wherein the switching element ( 16 ) of the switch ( 15 ) is a push button.

8 . The handheld work apparatus according to claim 1 ,

wherein the blocking element ( 9 ) has a switching tongue ( 25 ) for actuating the switching element ( 16 ) of the switch ( 15 ).

9 . The handheld work apparatus according to claim 8 ,

wherein the switching tongue ( 25 ) has a bent end section ( 26 ), and

wherein the bent end section ( 26 ) serves to actuate the switch ( 15 ).

10 . The handheld work apparatus according to claim 9 ,

wherein a cleaning opening ( 30 ) is formed on the bottom side ( 7 ) of the handle portion ( 5 ).

11 . The handheld work apparatus according to claim 10 ,

wherein, in the operating position ( 10 ) of the blocking element ( 9 ), the bent end section ( 26 ) of the switching tongue ( 25 ) is arranged adjacent to the cleaning opening ( 30 ) in such a way that dirt in the handle portion ( 5 ) is conveyed out of the cleaning opening ( 30 ) via the switching tongue ( 25 ).

12 . The handheld work apparatus according to claim 8 ,

wherein the switching tongue ( 25 ) is arranged between the bottom side ( 7 ) of the handle portion ( 5 ) and the switch ( 15 ) when in the blocking position.

13 . The handheld work apparatus according to claim 1 ,

wherein the switching element ( 16 ) of the switch ( 15 ) is depressed by the blocking element ( 9 ) when the blocking element ( 9 ) is in the blocking position ( 11 ), whereby the switch ( 15 ) is deactivated.

14 . The handheld work apparatus according to claim 1 ,

wherein the switching element ( 16 ) of the switch ( 15 ) is not depressed when the blocking element ( 9 ) is in the operating position ( 10 ), whereby the switch ( 15 ) is activated.

15 . The handheld work apparatus according to claim 1 ,

wherein the switch ( 15 ) has an actuating spring acting on the switching element ( 16 ), and

wherein the blocking element ( 9 ) is held in the blocking position ( 11 ) via a first return spring ( 12 ) when not actuated, and

wherein the first return spring ( 12 ) acts on the actuating spring of the switch ( 15 ) such that the switch ( 15 ) is deactivated when the blocking element ( 9 ) is in the blocking position ( 11 ).

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (32)