Abstract
The object of the invention is a convertible, dual function chair for sitting and kneeling, which gives the possibility of changing the position and relieving the spinal column during a prolonged work in a sitting position.
The dual function chair for sitting and kneeling is equipped with a movable backrest and headrest support, shaped in the lower part in such a way that its displacement changes the size of the chair simultaneously vertically and horizontally. It is also equipped with a sliding-rotating-returning or a sliding-returning backrest device, which makes it follow the user's back and support it accurately at every angle of inclination of the backrest when tilting the backrest. It is also equipped with a headrest connected to the headrest arm through a rotary-sliding mechanism, which rotationally connects with the backrest support, and has a specially shaped five-star base, in which the arms, apart from the fragment above the wheels, are maximally flattened and located as low as possible above the ground.
Claims
1-5. (canceled)
6. A dual function chair for sitting and kneeling, the chair comprising: a seat, a backrest, a headrest, a kneeler, a movable backrest and headrest support supporting the backrest and the headrest and having a lower part, the lower part shaped such that its movement changes the size of the chair simultaneously vertically and horizontally for adjustment to the size of a user of the chair.
7. A dual function chair for sitting and kneeling, the chair comprising: a seat, a backrest, a kneeler, a backrest support by which the backrest is supported and to which the backrest is pivotally connected, and a backrest spring for pivoting the backrest for maintaining the backrest against a user's back.
8. The chair of claim 7 wherein the backrest is also slidingly connected to the backrest support, the chair further comprising a backrest sliding spring for maintaining the backrest against a user's back.
9. A dual function chair for sitting and kneeling, the chair comprising: a seat, a backrest, a kneeler, a backrest support by which the backrest is supported and to which the backrest is slidingly connected, and a backrest sliding spring for maintaining the backrest against a user's back.
10. A dual function chair for sitting and kneeling, the chair comprising: a seat, a backrest connected to a backrest support, a kneeler, and a headrest rotationally connected to a headrest arm around a headrest rotation axis, the headrest arm is rotationally connected to the backrest support around a headrest arm rotation axis, the distance between the headrest rotation axis and the headrest arm rotation axis is greater than 200 mm.
11. The chair of claim 10, wherein the headrest is also slidingly connected to the headrest arm.
12. A dual function chair for sitting and kneeling, the chair comprising: a rotationally displaceable seat, a backrest, a kneeler, and a base, the base having five outwardly extending arms and five wheels, each arm having a central portion and an outward end, the wheels being connected to the arms at the outward ends, the wheels having tops, the arms along the central portion being below the tops.
Description
[0019] The object of the invention, in its embodiment, has been illustrated on the drawing:
[0020] FIG. 1 illustrates the chair for sitting and kneeling in the sitting position, provided with a movable backrest and headrest support, shaped in the lower part so that its displacement changes the size of the chair simultaneously vertically and horizontally, provided with a sliding-rotating-return pivoting backrest device which causes that when the backrest is tilted, it follows the user's back and at every angle of the backrest inclination it accurately supports the back, equipped with a headrest through a rotary-sliding mechanism connected to the headrest arm, which rotationally connects with the backrest support, and provided with a specially shaped five-star base, in which the arms, apart from the part above the wheels, are maximally flattened and located as low as possible above the ground.
[0021] FIG. 2 illustrates the chair for sitting and kneeling in the kneeling position, provided with a movable backrest and headrest support, and shaped in the lower part so that its displacement changes the size of the chair simultaneously vertically and horizontally, provided with a sliding-rotating-returning device of an pivoting backrest, which makes it follow the user's back when the backrest is tilted, and at every angle of the backrest inclination it accurately supports the back, equipped with a headrest through a rotary-sliding mechanism connected to the headrest arm, which rotationally connects with the backrest support, and provided with a specially shaped five-star a base, the arms of which, apart from the part above the wheels, are maximally flattened and located as low as possible above the ground.
[0022] FIG. 3 illustrates a cross-section of a movable backrest and a headrest support shaped in the lower part in such a way that the displacement changes the size of the chair simultaneously vertically and horizontally.
[0023] FIG. 4 illustrates a cross-sectional view of a sliding-rotary-return device for a pivoting backrest, which causes the backrest to follow the user's back when tilting and support it accurately at every inclination angle.
[0024] FIG. 5 illustrates a longitudinal section view of a sliding-rotary-return device for a pivoting backrest, which causes the backrest to follow the user's back when tilting and support it accurately at every inclination angle.
[0025] FIG. 6 illustrates the chair for sitting and kneeling in the sitting position, provided with a movable backrest and headrest support, and shaped in the lower part in such a way that its displacement changes the size of the chair simultaneously vertically and horizontally, provided with a sliding-return backrest device which makes it follow the user's back when tilting the backrest, and at every angle of the backrest inclination, it accurately supports the back, equipped with a headrest through a rotary-sliding mechanism connected to the headrest arm, which rotationally connects with the backrest support, and provided with a specially shaped five-star base, in which the arms, apart from the fragment above the wheels, are maximally flattened and located as low as possible above the ground.
[0026] FIG. 7 illustrates the chair for sitting and kneeling in the kneeling position, provided with a movable backrest and headrest support, and shaped in the lower part in such a way that its displacement changes the size of the chair simultaneously vertically and horizontally, provided with a sliding-return backrest device which causes that when tilting the backrest, it follows the user's back and at every angle of the backrest inclination, it accurately supports the back, equipped with a headrest through a rotary-sliding mechanism connected to the headrest arm, which rotationally connects with the backrest support, and provided with a specially shaped five-star base, in which the arms, apart from the fragment above the wheels, are maximally flattened and located as low as possible above the ground.
[0027] FIG. 8 illustrates a longitudinal-section view of a backrest sliding-return device which causes the backrest to follow the user's back when tilting the backrest and support it accurately at any inclination angle.
[0028] FIG. 9 illustrates the headrest through a sliding-rotary mechanism connected to the arm of the headrest, which rotary connects to the backrest.
[0029] FIG. 10 illustrates a specially shaped five-arm base, the arms of which, apart from the fragment above the wheels, are maximally flattened and located as low as possible above the ground.
[0030] FIG. 11 illustrates a plan view of a specially shaped five-arm base, the arms of which, apart from the fragment above the wheels, are maximally flattened and located as low as possible above the ground.
[0031] In the example of the implementation, FIG. 3 illustrates the movable backrest and headrest support and shaped in the lower part such that its displacement changes the size of the chair simultaneously vertically and horizontally. The backrest support 2 in the lower part is slidably connected with the chair mechanism 17, the sliding is blocked by the lock screw 18, the line of movement runs obliquely to the horizontal axis of the chair.
[0032] In the example of the implementation, FIGS. 1, 2, 4 and 5 illustrates the sliding-rotary-return device of a pivoting backrest, which causes the backrest to follow the user's back when the backrest is tilted and, at every angle of inclination of the backrest, it accurately supports the back. Constructed in such a way that the backrest support 2 is connected with the slider 1 along which the sliding part of the backrest support 3 slides. When the sliding part of the backrest support slides, it compresses the spring 16. The rotating part of the backrest support 4 is connected with the sliding part of the backrest support through the axis 10, which, when rotating, compresses the spring 15.
[0033] In the example of the implementation, FIGS. 6, 7, and 8 illustrates a backrest sliding-return device which causes the backrest to follow the user's back when the backrest is tilted, and at each angle of inclination of the backrest, it accurately supports the back. Constructed in such a way that the backrest support 2 is connected to the slider 1 on which the sliding part of the non-pivoting backrest support 19 slides. The sliding part of the non-pivoting backrest support 19 while sliding, compresses the spring 16.
[0034] In the example of the implementation, FIG. 9 illustrates the headrest 8 through an axis 14 rotary connected to a sliding element 17 slidably connected to the headrest arm 12, which headrest arm 12 is rotary connected via an axis 13 to the backrest support 2.
[0035] In the example of the implementation, FIGS. 10 and 11 illustrates a specially shaped five-arm base, the arms of which, apart from the portion above the wheels, are maximally flattened and located as low as possible above the ground. The base arm is constructed in such a way that in the front part it is above the wheel and then immediately behind the wheel it lowers and flattens so that its upper line is as low as possible above the ground.
MARKINGS LIST
[0036] 1-slider [0037] 2-backrest support [0038] 3-the sliding part of the backrest support [0039] 4-swivel part of the pivoting backrest [0040] 5-backrest [0041] 6-seat [0042] 7-armrest [0043] 8-headrest [0044] 9-base [0045] 10-backrest axis [0046] 11-base circle [0047] 12-headrest frame [0048] 13-axis of the headrest arm [0049] 14-headrest axis [0050] 15-backrest spring [0051] 16-backrest sliding spring [0052] 17-chair mechanism [0053] 18-backrest frame sliding lock screw [0054] 19-the sliding part of the non-pivoting backrest support
