Jigsaw puzzle having one or more puzzle pieces that can be bent

1. Jigsaw puzzle comprising:

at least one puzzle piece that can be bent along at least one predefined bending line and including an upper side, a lower side and a puzzle piece thickness that extends between the upper side and the lower side, wherein the puzzle piece thickness is reduced from an inner side of the bend along the at least one predefined bending line, wherein, on either side of, and along, each bending line, is a fixing device which releasably fixes a desired bending angle, each fixing device having at least one recess in which a corresponding protrusion engages in a clamping and/or latching manner when the puzzle piece is bent; the at least one recess is provided in a side wall of a groove which is formed along each bending line by a reduced puzzle piece thickness, and the corresponding protrusion is constructed in an opposing side wall of the groove, and wherein a bottom region of the groove, above which the side walls of the groove extend, defines, when viewed in cross-section, a free space which remains at least partially maintained, even when the puzzle piece is in a bent-over state.

2. Jigsaw puzzle according to claim 1 , wherein there is provided, on at least one face of the protrusion and/or one face of the recess, which face in each case extends at least substantially in the direction of the bending line cross-section, a latching protrusion which interacts, when the puzzle piece is in a predetermined bending position, in an inter-latching manner with a corresponding latching depression in an opposing face of the recess or of the protrusion respectively.

3. Jigsaw puzzle according to claim 1 , wherein the protrusion is formed by a section of a particular side wall of the groove that does not project above the puzzle piece thickness.

4. Jigsaw puzzle according to claim 1 , wherein the protrusion, or each protrusion, projects above the puzzle piece thickness.

5. Jigsaw puzzle according to claim 1 , wherein two mutually opposing side walls of a groove each have at least one protrusion and one recess.

6. Jigsaw puzzle according to claim 1 , wherein the puzzle piece has a number of bending lines which extend parallel to one another, the inner sides of which are arranged on a same side of the puzzle piece or on opposite sides of the puzzle piece.

7. Jigsaw puzzle according to claim 1 , wherein the puzzle piece has two bending lines which extend at an angle to one another and have a common end point of the bending lines, the inner sides of which are arranged on a same side of the puzzle piece.

8. Jigsaw puzzle according to claim 1 , wherein the side walls of the groove that face towards one another are inclined in relation to one another above the bottom region in such a way that they do not touch each other when the desired bending angle is reached.

9. Jigsaw puzzle according to claim 8 , wherein the side walls of the groove are inclined in relation to one another in such a way that they come into contact with one another shortly after the desired bending angle has been exceeded.

10. Jigsaw puzzle according to claim 1 , wherein, in the state in which they are folded over and connected to one another, a plurality of bendable puzzle pieces form an angle profile.

11. Jigsaw puzzle according to claim 1 , wherein two mutually opposing side walls of a groove each have a number of protrusions and recesses.