HAND-HELD JIGSAW

• US 20090025233A1
• Filed: 09/20/2007
• Published: 01/29/2009
• Est. Priority Date: 11/09/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Niehsen, Wolfgang, Frangen, Joachim, Platzer, Joachim, Koeder, Thilo, Flinspach, Gunter, Kaiser, Hans, Delfini, Stefano, Marx, Klaus
• Granted Patent: US 8,826,548 B2
• Time in Patent Office: Days
• US Class Current: 30/392
• CPC Class Codes: B23D 49/167 with means to adjust the guide plate or with means to adjust the plane in which the saw blade moves
• CPC Class Codes: B23D 51/02 of beds; of guiding arrangements for work-tables or saw carriers; of frames
• CPC Class Codes: B23D 59/002 for the position of the saw blade mounting for swiveling or tilting a circular saw blade B27B5/36; portable power-driven circular saws with adjustment for cutting depth or amount of tilting B27B9/02
• CPC Class Codes: Y10T 83/531 With plural work-sensing means
• CPC Class Codes: Y10T 83/828 With illuminating or viewing means for work

Abstract

The invention is based on a hand-held jigsaw, in particular a scrolling jigsaw. It is proposed that control means (10, 100) are provided, by means of which the guiding of a saw blade (12) and/or the hand-held jigsaw along scribe lines (14) can be automated.

Claims

1. A hand-held jigsaw, in particular a scrolling jigsaw,

characterized by means of control means (10, 100) that make it possible to automate a tracking of a saw blade (12) and/or the hand-held jigsaw along layout lines (14).

2. The hand-held jigsaw, in particular a scrolling jigsaw, in particular as recited in claim 1,

characterized by means of a sensor (16) for detecting a layout line (14) provided on a work piece (18).

3. The hand-held jigsaw as recited in claim 2,

wherein the sensor (16) is a camera unit (7).

4. The hand-held jigsaw at least as recited in claim 3,

wherein the sensor (16), in particular the camera unit (7), detects individual points (4) of the previously drawn line (14).

5. The hand-held jigsaw as recited in claim 2,

wherein the sensor (16) represents a contrast sensor unit (20) and/or an eddy current sensor unit (22).

6. The hand-held jigsaw at least as recited in claim 2,

wherein the sensor (16), in particular the contrast sensor unit (20) and/or eddy current sensor unit (22), detects individual points (4) of the previously drawn line (14).

7. The hand-held jigsaw as recited in claim 6,

wherein the contrast sensor unit (20) and/or eddy current sensor unit (22) interpolates an actual path curve (24) based on the detected points (4).

8. The hand-held jigsaw as recited in claim 7,

wherein the contrast sensor unit (20) and/or eddy current sensor unit (22) correspondingly adapts the saw blade angle (26) as a function of an overlaid user guidance of the hand-held jigsaw.

9. The hand-held jigsaw as recited in claim 2,

characterized by means of a processor unit (28) that generates control signals and/or transmits control signals to an actuator unit (30) for an adjustment of a saw blade angle (26).

10. The hand-held jigsaw as recited in claim 9,

wherein the actuator unit (30) correspondingly adapts the saw blade angle (26) as a function of an overlaid user guidance of a hand-held jigsaw.

11. The hand-held jigsaw as recited claim 1,

wherein the actuator unit (30) represents a mechanical/actuator system (2) that is able to adjust a saw blade angle (26) of a saw blade (12).

12. The hand-held jigsaw, in particular a scrolling jigsaw, in particular as recited in claim 1,

wherein optical mouse sensors (5) are used to determine a speed and a movement direction.

13. The hand-held jigsaw as recited in claim 1,

wherein a running wheel with an angular displacement transducer (32) is used to determine an advancing speed.

14. The hand-held jigsaw as recited in claim 1,

wherein means (5, 28) for comparing individual camera images are used to determine an advancing speed.

15. The hand-held jigsaw, in particular a scrolling jigsaw, in particular as recited in claim 1,

characterized by means of an actuator with a regulator (34).

16. The hand-held jigsaw as recited in claim 15,

wherein the actuator with the regulator (34) is a servo motor and/or a step motor and/or a piezoelectric actuator.

17. The hand-held jigsaw as recited in claim 1,

wherein it is possible to switch off means (2, 5, 7, 10, 16, 30, 34, 100) that permit an automation of a tracking of the saw blade (12) and/or the hand-held jigsaw along layout lines (14).

18. The hand-held jigsaw, in particular a scrolling jigsaw, in particular as recited in claim 1.

characterized by means of a display element (36) that is provided to display a recommended advancing direction (38).

19. The hand-held jigsaw as recited in claim 18,

wherein the display element (36) is composed of LEDs (40) and/or a display (42).

20. The hand-held jigsaw at least as recited in claim 1,

characterized by means of a pivotable saw blade (12) that is drivable by means of the control means (100).