Holder for attaching a headrest to the back of a seat

1. A chair, comprising:

a back holder adapted to be mounted to a seat base of the chair;

a seat back including a shell;

at least one attachment point including a connecting structure attaching the back to the seat back holder on a first rear side of the shell;

a headrest; and

a headrest holder having a bearing profile section hooked to a top of the shell of the seat back, and an arm having at least a portion thereof extending on a second front side of the shell of the seat back, wherein the arm extends to the one attachment point, and wherein the arm is held rigidly, at least in part, by the connecting structure.

2. The chair of claim 1 , wherein:

the shell includes a recess defining a shape;

the bearing profile section is in the form of a hook;

the arm includes at least one positioning stud having a shape corresponding to the shape of the recess in the shell, the one positioning stud fitting into the recess in the shell of the seat back.

3. The chair of claim 2 , wherein:

the connecting structure comprises a threaded fastener.

4. The chair of claim 1 , wherein:

the shell includes a plurality of recesses that are located at a same level;

the arm includes a plurality of positioning studs that are horizontally spaced apart from one another, and wherein the studs engage the recesses in the shell.

5. The chair of claim 4 , wherein:

the arm includes a pair of vertically extending portions having generally planar opposite side surface portions, and dogleg lower sections extending outwardly away from one another, and wherein each dogleg lower section includes at least one of the positioning studs at an outer end thereof.

6. The chair of claim 2 , wherein:

the one stud comprises a hollow protrusion having a bottom portion with an aperture through the bottom portion, and including:

a threaded fastener extending through the aperture and interconnecting the headrest holder, the shell, and the back holder.

7. The chair of claim 1 , wherein:

the holder for the headrest includes an upper portion having a curved slide rail; and

the headrest is attached to the upper portion.

8. The chair of claim 7 , wherein:

the upper portion of the holder for the headrest includes a pair of parallel curved slide rails defining upper ends, the upper portion further including a cross member connected to the curved slide rails in the area of the upper ends.

9. The chair of claim 1 , wherein:

the holder for the headrest comprises nylon PA6 polymer filled with fiberglass in a ratio in a range of 25% to 45%.

10. A chair, comprising:

a back holder adapted to be mounted to a seat base of the chair;

a seat back including a shell having a generally upright front surface and an upper edge portion;

at least one attachment point including a connecting structure attaching the seat back to the back holder;

a headrest; and

a headrest holder having a bearing profile section hooked to the upper edge portion of the shell of the seat back, the headrest holder including an arm having at least a portion thereof engaging the upright front surface of the shell, wherein the arm extends to the one attachment point, and wherein the arm is held rigidly, at least in part, by the connecting structure.

11. The chair of claim 10 , wherein:

the bearing profile section comprises a downwardly opening hook; and

the upper edge portion of the shell is disposed in the downwardly opening hook.