A chair comprising a base structure (12) bearing a seat (14), a backrest (16) and a writing tablet (38) movable between a first lowered inoperative position and a raised operative position, in which in the first lowered inoperative position the tablet (38) is parallel to a vertical axis and is incli
A chair comprising a base structure (12) bearing a seat (14), a backrest (16) and a writing tablet (38) movable between a first lowered inoperative position and a raised operative position, in which in the first lowered inoperative position the tablet (38) is parallel to a vertical axis and is inclined relative to a vertical plane parallel to the longitudinal axis of the chair, so that two or more chairs of the same type can be approached longitudinally to each other with the tablets of two adjacent chairs partially superposed on each other. The writing tablet (38) is also provided with a second lowered inoperative position in which the tablet is inclined relative to a vertical axis and is inclined relative to said vertical plane parallel to the longitudinal axis of the chair, so that two or more chairs of the same type can also be superposed vertically on each other with the tablets of two adjacent chairs partially superposed on each other.
대표청구항▼
The invention claimed is: 1. A chair comprising: a base structure bearing a seat, a backrest and a writing tablet, wherein the writing table is movable between a first lowered inoperative position and a raised operative position, in which in the first lowered inoperative position a top writing surf
The invention claimed is: 1. A chair comprising: a base structure bearing a seat, a backrest and a writing tablet, wherein the writing table is movable between a first lowered inoperative position and a raised operative position, in which in the first lowered inoperative position a top writing surface of the writing tablet is parallel to a vertical axis and the top writing surface is inclined horizontally relative to a vertical plane parallel to a longitudinal axis of the chair, so that two or more chairs of the same type can be approached longitudinally to each other with the writing tablets of two adjacent chairs partially superposed on each other; a first axis of rotation, wherein the first axis of rotation is substantially horizontal and at an angle relative to the longitudinal axis of the chair; and the writing tablet being also provided with a second lowered inoperative position in which the top writing surface of the writing tablet is inclined relative to a vertical axis and the top writing surface is inclined horizontally relative to said vertical plane parallel to the longitudinal axis of the chair, so that two or more chairs of the same type can also be superposed vertically on each other with the tablets of two adjacent chairs partially superposed on each other, wherein the writing table is pivoted about the first axis of rotation when moved between the first lowered inoperative position and the second lowered inoperative position. 2. A chair as claimed in claim 1, wherein the writing tablet is borne by an articulation device having the first axis of rotation parallel to the plane of the tablet and a second axis of rotation orthogonal to the plane of the tablet. 3. A chair as claimed in claim 2, wherein the articulation device comprises retaining means to hold the tablet in two stable positions corresponding to the first lowered inoperative position and to the second lowered inoperative position. 4. A chair as claimed in claim 3, wherein the articulation device comprises a stationary support provided with a pivot defining said first axis of rotation and whereon is pivotally mounted a body having a pivot shaped portion defining said second axis of rotation. 5. A chair as claimed in claim 4, wherein the articulation device comprises a covering element bearing an elastic lamina co-operating with a pair of retaining notches formed on a retaining portion of said stationary support. 6. A chair as claimed in claim 4, wherein the writing tablet is fastened to a support plate provided with a through hole which pivotally engages said pivot shaped portion of said rotary body, an arresting element being fastened to an end of said pivot shaped portion. 7. The chair as claimed in claim 5, wherein the retaining portion is configured to retain the writing table in each of the first lowered inoperative position and the second lowered inoperative position. 8. A chair as claimed in claim 1, wherein the support structure comprises, on each side of the chair, a first bar and a second bar fastened to each other according to a general X configuration, the first bar and the second bar being distanced from each other in the lateral direction. 9. A chair as claimed in claim 8, wherein the first bar has a lower portion forming a rear leg and an upper portion forming a support for an armrest, and in that the second bar has a lower portion forming a front leg and an upper portion forming a support for the backrest. 10. A chair as claimed in claim 9, comprising an armrest on each side of the chair, each armrest being able to rotate around a horizontal axis between a lowered operative position and a raised inoperative position. 11. The chair as claimed in claim 10, wherein the armrest is configured to move independently of the writing table and the horizontal axis is parallel with the longitudinal axis of the chair. 12. A chair, comprising: a seat; a backrest; a support structure for supporting the seat and the backrest; a writing table wherein the writing table is configured to move between three positions, the three positions comprising: a raised operative position wherein the writing table is in a position allowing a user sitting on the chair to write on the writing table; a first inoperative position wherein a top writing surface of the writing table is substantially parallel to a vertical axis and the top writing surface is at an angle relative to a vertical plane through a center line of the seat and the backrest; a second inoperative position wherein the top writing surface of the writing table is at an angle relative to the vertical axis and the top writing surface is at an angle relative to a vertical plane through a center line of the seat and the backrest, wherein the writing table rotates about a first axis of rotation between the first inoperative position and the second inoperative position, the first axis of rotation being substantially horizontal and positioned at an angle relative to a longitudinal axis of the chair; and a retaining portion configured to hold the writing table in the first inoperative position and the second inoperative position. 13. The chair of claim 12, wherein the retaining portion further comprises an elastic retaining member configured to engage one or more retaining notches. 14. The chair of claim 12, further comprising an arm rest configured to provide support for a users arm and wherein the writing table is configured to move independently from the arm rest. 15. The chair of claim 14, wherein the arm rest is configured to move between an arm support position wherein the arm rest is in alignment with the writing table when the writing table is in the raised operative position and a vertical position wherein a top surface of the arm rest is substantially vertical. 16. The chair of claim 15, further comprising a second arm rest located on the opposite side of the chair from the writing table and configured to support the users non-writing arm. 17. The chair of claim 12, wherein the writing table rotates only about the first axis of rotation when the writing table is moved between the first inoperative position and the second inoperative position. 18. The chair of claim 12, wherein the angle between the first axis of rotation and the longitudinal axis of the chair is configured to increased the distance the writing table is from the seat from a front end of the writing table to a rear end of the writing table when the writing table is in the first inoperative position and the second inoperative position.
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