SEATING FURNITURE CHASSIS

Abstract

A seating furniture chassis comprises a seat surface frame, a lever mechanism, a footrest, a guide element, and a guide rail. The footrest is connected to the seat surface frame by the lever mechanism and is convertible between a folded-in state in which the footrest is arranged below the seat surface frame and a folded-out state in which the footrest forms an obtuse angle with the seat surface frame. The guide element is rigidly connected to the seat surface frame. When the footrest is converted between the folded-out and folded-in states, the guide element is guided in the guide rail, which has a curved shape.

Claims

1. A seating furniture chassis, comprising: a seat surface frame; a lever mechanism; a footrest connected to the seat surface frame by the lever mechanism, the footrest being convertible between a folded-in state in which the footrest is arranged below the seat surface frame and a folded-out state in which the footrest forms an obtuse angle with the seat surface frame; a first guide element rigidly connected to the seat surface frame; and a first guide rail having a curved shape, wherein when the footrest is converted between the folded-out and folded-in states, the first guide element is guided in the first guide rail.

2. The seating furniture chassis of claim 1, wherein the first guide rail has a front end, a rear end, and a central region arranged between the front and rear ends, wherein the front and rear ends are arranged lower than the central region.

3. The seating furniture chassis of claim 2, wherein the first guide element in the folded-out state of the footrest is arranged on the rear end of the first guide rail.

4. The seating furniture chassis of claim 2, wherein the first guide element in the folded-in state of the footrest is arranged on the front end of the first guide rail.

5. The seating furniture chassis of claim 1, wherein the lever mechanism comprises a lever arranged rotatably on the seat surface frame, wherein the lever extends forwards and downwards in the folded-in state of the footrest.

6. The seating furniture chassis of claim 5, wherein: the footrest further comprises an element and the lever is connected rotatably to the element; in the folded-in state of the footrest, the lever forms an acute angle or a right angle with the element; and in the folded-out state of the footrest, the lever forms an obtuse angle with the element.

7. The seating furniture chassis of claim 1, wherein the first guide rail is arranged laterally next to the seat surface frame.

8. The seating furniture chassis of claim 1, further comprising a stand apparatus configured to stand stationarily on a flat surface and to support the seat surface frame, wherein the first guide rail is rigidly connected to the stand apparatus.

9. The seating furniture chassis of claim 1, wherein the first guide element protrudes through the first guide rail.

10. The seating furniture chassis of claim 1, further comprising a second guide rail and a second guide element, wherein when the footrest is converted between the folded-out and folded-in states, the second guide element is guided in the second guide rail, and wherein the second guide rail has the same shape as the first guide rail.

11. The seating furniture chassis of claim 10, wherein the first guide rail and the first guide element are arranged laterally next to a first end of the seat surface frame, and the second guide rail and the second guide element are arranged laterally next to a second end of the seat surface frame, the first end being arranged opposite the second end.

12. The seating furniture chassis of claim 1, further comprising third and fourth guide elements and third and fourth guide rails, wherein: the third guide element and the third guide rail are arranged laterally next to the first end of the seat surface frame; the fourth guide element and the fourth guide rail are arranged laterally next to the second end of the seat surface frame; when the footrest is converted between the folded-in and folded-out states, the third guide element is guided in the third guide rail and the fourth guide element is guided in the fourth guide rail; and the third and fourth guide elements and the third and fourth guide rails are arranged closer to a rear end region of the seat surface frame than the first guide element and the first guide rail.

13. The seating furniture chassis of claim 12, wherein the third and fourth guide rails have a curved shape.

14. The seating furniture chassis of claim 13, wherein the third and fourth guide rails each have a front end, a rear end, and a central region arranged between the front and rear ends, wherein the rear end is arranged lower than the central region and the front end.

15. The seating furniture chassis of claim 14, wherein in the folded-out state of the footrest, the third guide element is arranged on the rear end of the third guide rail and the fourth guide element is arranged on the rear end of the fourth guide rail.

16. The seating furniture chassis of claim 14, wherein in the folded-in state of the footrest, the third guide element is arranged on the front end of the third guide rail and the fourth guide element is arranged on the front end of the fourth guide rail.

17. The seating furniture chassis of claim 13, wherein during guidance in the third and fourth guide rails, respectively, the third and fourth guide elements are guided only horizontally and/or downwards when the footrest is converted from the folded-in state to the folded-out state.

18. The seating furniture chassis of claim 13, wherein during guidance in the third and fourth guide rails, respectively, the third and fourth guide elements are guided initially horizontally and thereafter downwards when the footrest is converted from the folded-in state to the folded-out state.

19. The seating furniture chassis of claim 1, wherein the footrest comprises an extending mechanism to make the footrest longer during conversion from the folded-in state to the folded-out state and to make the footrest shorter during conversion from the folded-out state to the folded-in state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features and advantages of the disclosed seating furniture chassis will become apparent from the following description of example embodiments with reference to the accompanying drawings. In this case, the same reference numerals are used for the same or similar components and for components with the same or similar functions. In the drawings:

[0033] FIGS. 1A and 1B respectively show in schematic form two views of a seating furniture chassis, according to one disclosed embodiment, with a footrest in a folded-in state;

[0034] FIGS. 2A and 2B respectively show in schematic form two views of the seating furniture chassis of FIGS. 1A and 1B with the footrest between a folded-in state and a folded-out state; and

[0035] FIGS. 3A and 3B respectively show in schematic form two views of the seating furniture chassis of FIGS. 1A and 1B with the footrest in the folded-out state.

DETAILED DESCRIPTION

[0036] Referring to FIGS. 1A and 1B, a seating furniture chassis comprises a seat surface frame 100, a stand apparatus 101, a first guide element 102, a first guide rail 103, a second guide element 107, a second guide rail 108, a third guide element 104, a third guide rail 105, a fourth guide element 109, a fourth guide rail 110 and a footrest 200 (see FIGS. 2A, 2B, 3A and 3B).

[0037] The guide elements 102, 104, 107 and 109 are rigidly connected to the seat surface frame 100. The guide rails 103, 108, 105 and 110 are rigidly connected to the stand apparatus 101. In addition, the seat surface frame 100 is connected to the footrest 200 by a lever 106 and an element 111. The stand apparatus 101 serves to ensure that the seating furniture chassis stands stably on a flat surface.

[0038] The seat surface frame 100 can be displaced relative to the stand apparatus 101. During a displacement of the seat surface frame 100, the guide elements 102, 104, 107, and 109 are guided in the respective guide rails 103, 105, 108 and 110, so that the seat surface frame 100 is tilted during the displacement.

[0039] When the seat surface frame 100 is moved translationally by a force, exerted by a user, for example, out of the state of the seating furniture chassis (shown in FIGS. 1A and 1B) with a folded-in footrest 200, a fold out movement of the footrest 200 is triggered as a result of the seat surface frame 100 being connected to the footrest 200 by the lever 106 and the element 111. When the footrest is folded in, the lever 106 extends obliquely forwards and downwards. The force can be generated by the user, for example, in that he moves the seat surface frame 100 rearwards with his body. In this case he braces himself against the armrests that are connected to the stand apparatus 101.

[0040] The first guide rail 103 and the second guide rail 108 have a curved shape. In this case the front end, where the respective guide element 102 or 107 is located when the footrest is folded in, is arranged lower than a central region of the guide rail 103 or 108. The same applies analogously to the rear end in each case. The guide elements 102 and 107 are arranged on the rear end, when the footrest 200 is in the folded-out state. Thus, the seat surface frame 100 is first pivoted upwards on the end facing the footrest, when the footrest 200 is converted from the folded-in state to the folded-out state. The result of this movement together with the direction of extension of the lever 106 is that the fold out movement of the footrest 200 can be triggered by the user moving the seat surface frame 100 rearwards.

[0041] During the fold out process of the footrest 200, shown in stages in FIGS. 2A, 2B, 3A, and 3B, the angle between the lever 106 and the element 111 changes. In the folded-in state of the footrest 200, an upper end of the element 111 forms an acute angle with the lever 106, while a lower end of the element 111 forms a right angle with the lever 106. The angle between the lever 106 and the element 111 becomes larger during the fold out process of the footrest 200 so that in the folded-out state the footrest 200 is arranged in a position that is comfortable for a user. In the folded-in state, the footrest is arranged close to the seat surface frame 100 in a particularly space saving manner.

[0042] The third guide element 104 and the fourth guide element 109 are arranged on a rear end of the seat surface frame 100, so that their guidance via the third guide rail 105 and the fourth guide rail 110 during the fold out process of the footrest 200 determines a tilt of the rear end of the seat surface frame 100. The third guide rail 105 and the fourth guide rail have a curved shape, with a front end being arranged higher than a rear end. This arrangement is advantageous for a comfortable tilt of the seat surface frame 100, when the footrest 200 is in the folded-out state.