Aircraft fuselage comprising at least two transparent walls interposed between an upper portion and a lower portion of the fuselage

1. An aircraft fuselage comprising a passenger cabin equipped with seats, wherein the fuselage comprises:

at least one lower part having a right-hand upper edge, a left-hand upper edge, a lower framework, having lower frames disposed in transverse planes distributed regularly in a longitudinal direction, and a lower skin secured to the lower framework and having a right-hand upper edge face and a left-hand upper edge face;

at least one upper part having a right-hand lower edge connected to the right-hand upper edge of the lower part in a first joining zone and a left-hand lower edge connected to the left-hand upper edge of the lower part in a second joining zone, the upper part comprising an upper framework, having upper frames disposed in transverse planes distributed regularly in the longitudinal direction;

certain lower frames of the lower part being reinforced and positioned in line with reinforced upper frames of the upper part, the reinforced lower frames each comprising a first end connected to a first end of one of the reinforced upper frames by a first connection, and a second end connected to a second end of the reinforced upper frame by a second connection, one or more reinforced lower frames and one or more reinforced upper frames connected by the first and second connections, forming one or more structural connections connecting the lower part and the upper part;

the at least one upper part further comprising an upper skin secured to the upper framework and having a right-hand lower edge face and a left-hand lower edge face, the right-hand upper edge face and left-hand upper edge face, respectively, of the lower skin and the right-hand lower edge face and left-hand lower edge face, respectively, of the upper skin being spaced apart between the one or more structural connection and joined at the one or more structural connection,

the fuselage further comprising:

in each first and second joining zone, at least one space between the lower and upper parts and the one or more structural connections positioned above the seats of the passenger cabin, the space being free of any structural part of the fuselage;

for each of the at least one space, a transparent wall for closing off said at least one space; and

for each space, a framing structure having two spars connecting the one or more structural connections when the framing structure is mounted and two uprights connecting the spars, the transparent wall being mounted edge-to-edge on the framing structure.

2. The aircraft fuselage according to claim 1 , wherein the framing structure comprises at least one reinforcement parallel to the uprights connecting the spars.

3. The aircraft fuselage according to claim 1 , further comprising lower frames interposed between the reinforced lower frames, the lower frames not extending beyond the right-hand and left-hand upper edge faces of the lower skin, and upper frames interposed between the reinforce upper frames, the upper frames not extending beyond the right-hand and left-hand lower edge faces of the upper skin.

4. The aircraft fuselage according to claim 3 , wherein, when the framing structure is mounted, lower frames interposed between the reinforced lower frames and upper frames interposed between the reinforced upper frames are connected to the framing structure.

5. The aircraft fuselage according to claim 1 , wherein the spars are dimensioned such that the uprights are pressed against the one or more structural connections, and

wherein the spars connect the one or more structural connections when the framing structure is mounted.

6. The aircraft fuselage according to claim 1 , wherein each transparent wall is equipped with a masking system configured to opacify the transparent wall in an activated state.

7. The aircraft fuselage according to claim 6 , wherein the masking system comprises an electrochromatic or electro-optical film attached to the transparent wall.

8. An aircraft comprising a fuselage according to claim 1 .