Chiseling power tool

1. A hand-held power tool, comprising:

a pneumatic striking mechanism, including:

a motor-driven exciter, wherein the exciter is coupled to a motor via an eccentric or a wobble finger and wherein the exciter is forced into a periodic movement by the eccentric or the wobble finger;

a guide tube; and

a striker;

wherein a pneumatic spring configured inside the guide tube between the exciter and the striker is circumferentially sealed pressure-tight by an inner surface of the guide tube;

wherein the exciter and the striker are guided by the inner surface;

wherein the inner surface of the guide tube has a plurality of molded depressions and wherein the guide tube has a plurality of vent openings.

2. The hand-held power tool according to claim 1 , wherein the depressions have a depth of between 10 μm and 100 μm.

3. The hand-held power tool according to claim 1 , wherein a dimension of the depressions parallel to a longitudinal axis is less than 200 μm.

4. The hand-held power tool according to claim 1 , wherein the depressions occupy a surface area of between 1% and 10% of the inner surface.

5. The hand-held power tool according to claim 1 , wherein the depressions are dents and wherein a respective length and width of the dents are substantially equal.

6. The hand-held power tool according to claim 1 , wherein the depressions are a plurality of grooves running obliquely to a longitudinal axis.

7. The hand-held power tool according to claim 6 , wherein grooves of the plurality of grooves cross each other in a diamond shape.

8. The hand-held power tool according to claim 6 , wherein grooves of the plurality of grooves extend over at least a path covered by the striker during a percussive operation.

9. The hand-held power tool according to claim 6 , wherein an angle of inclination of the plurality of grooves to the longitudinal axis is between 30 degrees and 50 degrees.

10. The hand-held power tool according to claim 6 , wherein an angle of inclination of the plurality of grooves decreases along an impact direction and wherein the angle of inclination in a region of a point of impact is between 20 degrees and 40 degrees.

11. The hand-held power tool according to claim 1 , wherein the guide tube is a bent sheet-metal strip.

12. The hand-held power tool according to claim 11 , wherein two opposing edges of the guide tube are connected by an intermeshing form-fit.

13. A pneumatic striking mechanism of a hand-held power tool, comprising:

an exciter, wherein the exciter is coupled to a motor via an eccentric or a wobble finger and wherein the exciter is forced into a periodic movement by the eccentric or the wobble finger;

a striker; and

a guide tube;

wherein the exciter and striker are disposed within the guide tube;

wherein an inner surface of the guide tube has a plurality of depressions and wherein the guide tube has a plurality of vent openings.

14. The pneumatic striking mechanism according to claim 13 , wherein the depressions are grooves.

15. The pneumatic striking mechanism according to claim 13 , wherein the depressions are dents.

16. A hand-held power tool, comprising:

a pneumatic striking mechanism, including:

a motor-driven exciter;

a guide tube with an inner surface;

a striker, wherein the striker strikes either directly or indirectly on a tool bit; and

a pneumatic spring, wherein the pneumatic spring is formed by a pneumatic chamber between the exciter and the striker and wherein the pneumatic spring couples a movement of the exciter to the striker;

wherein the exciter and the striker are guided by the inner surface;

wherein the inner surface of the guide tube has a plurality of molded depressions and wherein the guide tube has a plurality of vent openings.