Seating furniture chassis

Abstract

The present invention relates to a seating furniture chassis, comprising a seat surface frame (100), a footrest (200), a lever mechanism (106; 111), a first guide element (102) and a first guide rail (103), wherein the footrest (200) is connected to the seat surface frame (100) via the lever mechanism (106; 111), wherein the footrest (200) can be transferred from a retracted state into an extended state, and vice versa, wherein the footrest (200) in the retracted state is arranged below the seat surface frame (100), wherein the footrest (200) in the extended state encloses an obtuse angle with the seat surface frame (100), wherein the seat surface frame (100) is connected in a positionally fixed manner to the first guide element (102), wherein, when the footrest (200) is transferred from the extended state into the retracted state, and vice versa, the first guide element (102) is guided in the first guide rail (103), characterized in that the first guide rail (103) has a curved shape.

Description

[0001] The present invention relates to a seating furniture chassis according to the preamble of claim 1.

[0002] Seating furniture chassis with swiveling footrests are known from the prior art, wherein a seat surface frame of the seating furniture chassis is also moved translationally and / or tilted when the footrest is folded out.

[0003] A seating furniture chassis according to the preamble of claim 1 is known from DE 20 2007 004 695 U1 and US 58343 A.

[0004] US patent 2016 / 302573 A1 discloses a seat with a stationary support frame that at least partially defines a cavity. The seat may also include a backrest cushion, a headrest, and a movement mechanism. The movement mechanism has a headrest assembly that allows the headrest to move between a retracted and an extended position. In the retracted position, the headrest is not visible within the cavity of the support frame. In the extended position, the headrest is visible above the backrest cushion.

[0005] US Patent 2001 / 033101 A1 discloses an adjustable passenger seat comprising a seat frame to which a seat cushion is attached, a seat back extending upward from the seat cushion, and a seat cushion / seat back joint assembly for simultaneously changing the position of the seat cushion and seat back relative to each other. A transmission linkage is provided for attaching the seat cushion and backrest to shift the movement of the seat cushion relative to the backrest when the backrest is folded back from an upright position and raised to an upright position. The transmission linkage extends the effective length of the seat base relative to the backrest to provide additional support for the buttocks and legs of the seated passenger.

[0006] Furthermore, US 3 363 942 A is known to be another seating furniture chassis with a foldable footrest.

[0007] In contrast, the present invention is based on the objective of creating a seating furniture chassis in which the footrest can be folded in below the seat frame in a particularly space-saving manner.

[0008] This problem is solved by a seating furniture chassis with the features of claim 1. Embodiments of the invention are specified in the dependent claims.

[0009] The seating furniture chassis comprises a seat frame, a footrest, a lever mechanism, a first guide element, and a first guide rail. For the purposes of this description, the seat frame is understood to be, in particular, a structure onto which a cushion can be attached during the intended use of the seating furniture chassis, enabling a person to sit on this cushion.

[0010] The footrest is connected to the seat frame via a lever mechanism. The footrest can be moved from a folded to an extended position and vice versa. In the folded position, the footrest is located below the seat frame. In the extended position, the footrest forms an obtuse angle with the seat frame.

[0011] The seat frame is fixedly connected to the first guide element. When the footrest is moved from the extended to the folded position and vice versa, the first guide element is guided in the first guide rail. This means, in particular, that the first guide element is moved, and the direction of movement is determined by the first guide rail.

[0012] According to the invention, the first guide rail has a curved shape. This means, in particular, that the rail can be, for example, arc-shaped. For instance, the shape can be free of corners. The curved shape has the advantage that the seat frame follows the curved shape during the unfolding of the footrest. This allows the footrest to be positioned relatively close to the seat frame when folded.

[0013] The lever mechanism comprises a lever that is rotatably mounted on the seat frame. When the footrest is folded down, the entire lever extends forward and downward. It is possible, in particular, that the lever is mounted directly on the seat frame. In this description, "downward" refers specifically to the direction the seat frame is in when used as intended. "Forward" refers specifically to the direction a user faces when seated on the seat frame when using the seat frame as intended.

[0014] This lever orientation is advantageous because it allows the user to easily trigger the footrest's deployment by applying a backward force to the seat frame. This can be done, for example, by leaning on the armrests. The lever's orientation, combined with the shape of the first guide rail, then causes the footrest to deploy.

[0015] The lever is rotatably connected to a footrest element. When the footrest is folded, the lever and the element form an acute angle. When the footrest is extended, the lever and the element form an obtuse angle. This arrangement is advantageous for easily triggering the extension of the footrest and for storing the footrest in a space-saving manner beneath the seat frame when folded.

[0016] According to one embodiment of the invention, the first guide rail can have a front end, a rear end, and a central section arranged between the front and rear ends. The front and rear ends can be positioned lower than the central section. The front end is understood to be, in particular, an end that is closer to the footrest in the unfolded state than the rear end. The rear end can be positioned, in particular, closer to fastening means for a backrest than the front end. For the purposes of this description, the lower position is understood to mean, in particular, that the ends are positioned closer to the ground surface than the central section when the seating furniture chassis is used as intended.

[0017] This type of guide rail results in a particularly pleasant and easy-to-activate folding movement of the footrest for the user.

[0018] According to one embodiment of the invention, the first guide element can be arranged at the rear end of the first guide rail when the footrest is unfolded.

[0019] According to one embodiment of the invention, the first guide element can be arranged at the front end of the first guide rail when the footrest is folded in.

[0020] According to one embodiment of the invention, the first guide rail can be arranged laterally next to the seat frame. For the purposes of this description, this means in particular that the first guide rail is arranged next to a lateral end of the seat frame, the lateral end extending from a rear to a front end.

[0021] According to one embodiment of the invention, the seating furniture chassis can include a stand. The stand can be designed to stand stationary on a flat surface and to support the seat frame. The first guide rail can be permanently connected to the stand.

[0022] According to one embodiment of the invention, the first guide element can protrude through the first guide rail.

[0023] According to one embodiment of the invention, the seating furniture chassis can comprise a second guide rail and a second guide element. When the footrest is moved from the extended to the folded position and vice versa, the second guide element can be guided in the second guide rail. In particular, it is possible that the second guide element has features described in this description with respect to the first guide element. The same applies accordingly to the second guide rail, which can have features described in this description with respect to the first guide rail. In particular, the second guide rail can have the same shape as the first guide rail.

[0024] The use of the second guide element and the second guide rail is advantageous in order to increase the stability of the seating furniture chassis, especially when the footrest is extended.

[0025] According to one embodiment of the invention, the first guide rail and the first guide element can be arranged laterally next to a first end of the seat frame. The second guide rail and the second guide element can be arranged laterally next to a second end of the seat frame. The first end can be positioned opposite the second end.

[0026] According to one embodiment of the invention, the seating furniture chassis can comprise a third and a fourth guide element and a third and a fourth guide rail. The third guide element and the third guide rail can be arranged laterally next to the first end of the seat frame. The fourth guide element and the fourth guide rail can be arranged laterally next to the second end of the seat frame.

[0027] When moving the footrest from the folded to the unfolded state and vice versa, the third guide element can be guided in the third guide rail and the fourth guide element in the fourth guide rail.

[0028] The third and fourth guide elements and the third and fourth guide rails can be positioned closer to a rear end of the seat frame than the first guide element and the first guide rail. This allows the rear end of the seat frame to be guided during an extension or retraction movement.

[0029] According to one embodiment of the invention, the third and fourth guide rails can have a curved shape.

[0030] According to one embodiment of the invention, the third and fourth guide rails can each have a front end, a rear end, and an intermediate middle section. The rear end can be positioned lower than the middle section and the front end. This shape causes the rear section of the seat frame to lower when the footrest is moved from the folded to the unfolded position and is often perceived as comfortable by users.

[0031] According to one embodiment of the invention, the third guide element can be arranged at the rear end of the third guide rail when the footrest is unfolded. The fourth guide element can be arranged at the rear end of the fourth guide rail when the footrest is unfolded.

[0032] According to one embodiment of the invention, the third guide element can be arranged at the front end of the third guide rail when the footrest is folded in the folded state. The fourth guide element can be arranged at the front end of the fourth guide rail when the footrest is folded in the folded state.

[0033] According to one embodiment of the invention, the third guide element when guided in the third guide rail and the fourth guide element when guided in the fourth guide rail can only be guided horizontally and / or downwards during the transition of the footrest from the folded to the unfolded state.

[0034] According to one embodiment of the invention, the third guide element in the third guide rail and the fourth guide element in the fourth guide rail can be guided first horizontally and then downwards during the transition of the footrest from the folded to the unfolded state. The downward guidance can, in particular, include a movement that comprises both a horizontal and a vertical component.

[0035] According to one embodiment of the invention, the footrest can include an extension mechanism designed to lengthen the footrest when transitioning from the folded to the unfolded state and to shorten it when transitioning from the unfolded to the folded state.

[0036] Further features and advantages of the present invention will become clear with reference to the following description of preferred embodiments and the accompanying figures. The same reference numerals are used for identical and similar components and for components with identical or similar functions. These figures show: Fig. 1 shows two schematic views of a seating furniture chassis according to an embodiment of the invention with a footrest in a folded-in state; Fig. 2 shows two schematic views of the seating furniture chassis made of Fig. 1 with the footrest between a folded-in state and an unfolded state; and Fig. 3 two schematic views of the seating furniture chassis made of Fig. 1 with the footrest in the unfolded position.

[0037] The seating furniture chassis comprises a seat frame 100, a stand device 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.

[0038] The guide elements 102, 104, 107, and 109 are permanently connected to the seat frame 100. The guide rails 103, 108, 105, and 110 are permanently connected to the stand 101. The seat frame 100 is also connected to the footrest 200 via a lever 106 and an element 111. The stand 101 ensures the stability of the seating furniture chassis on a flat surface.

[0039] The seat frame 100 is displaceable relative to the stand device 101, wherein during a displacement of the seat 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 frame 100 is inclined during the displacement.

[0040] If the seat frame 100, for example, is made from the in Figure 1In the depicted state of the seating furniture chassis with the footrest 200 folded in, when a force is applied by a user, the connection between the seat frame 100 and the footrest 200 via the lever 106 and the element 111 triggers an unfolding movement of the footrest 200. When the footrest is folded in, the lever 106 extends obliquely forward and downward. The force can be applied by the user, for example, by moving the seat frame 100 backward with their body, while supporting themselves on armrests connected to the stand 101.

[0041] The first guide rail 103 and the second guide rail 108 have a curved shape. The front end, where the respective guide element 102 or 107 is located when the footrest is folded, is positioned lower than the central section of the guide rail 103 or 108, respectively. The same applies analogously to the rear end. The guide elements 102 and 107 are located at the rear end when the footrest 200 is in the extended position. Thus, when the footrest 200 is moved from the folded to the extended position, the seat frame 100 is first pivoted upwards at the end facing the footrest. This movement, in combination with the direction of extension of the lever 106, results in the extension of the footrest 200 being triggered by the user moving the seat frame 100 backwards.

[0042] During the unfolding process of the footrest 200, the angle between the lever 106 and the element 111 changes. In the folded state of the footrest 200, the upper end of the element 111 forms an acute angle with the lever 106, while the lower end of the element 111 forms a right angle with the lever 106. The angle between the lever 106 and the element 111 increases during the unfolding process of the footrest 200, so that in the unfolded state the footrest 200 is positioned in a comfortable position for the user. In the folded state, the footrest is positioned particularly close to the seat frame 100, thus saving space.

[0043] The third guide element 104 and the fourth guide element 109 are arranged at a rear end of the seat frame 100, such that their guidance by the third guide rail 105 and the fourth guide rail 110 determines an inclination of the rear end of the seat frame 100 during the unfolding of the footrest 200. The third guide rail 105 and the fourth guide rail have a curved shape, with one front end positioned higher than the other rear end. This is advantageous for a comfortable inclination of the seat frame 100 when the footrest 200 is in the unfolded position.

Claims

1. Seating furniture chassis, comprising a seat surface frame (100), a footrest (200), a lever mechanism (106; 111), a first guide element (102) and a first guide rail (103), wherein the footrest (200) is connected to the seat surface frame (100) via the lever mechanism (106; 111), wherein the footrest (200) can be transferred from a folded-in state into a folded-out state and vice versa, wherein the footrest (200) is arranged below the seat surface frame (100) in the folded-in state, wherein the footrest (200) encloses an obtuse angle with the seat surface frame (100) in the folded-out state, wherein the seat surface frame (100) is connected in a stationary manner to the first guide element (102), wherein the first guide element (102) is guided in the first guide rail (103) when the footrest (200) is transferred from the folded-out state into the folded-in state and vice versa, wherein the first guide rail (103) has a curved shape, wherein the lever mechanism (106; 111) comprises a lever (106) which is arranged rotatably on the seat surface frame (100), wherein the entire lever (106) extends forwards and downwards in the folded-in state of the footrest (200), and wherein the lever (106) is connected rotatably to an element (111) of the footrest (200), wherein the entire lever (106) encloses an acute angle with the element (111) in the folded-in state of the footrest (200), and wherein the entire lever (106) encloses an obtuse angle with the element (111) in the folded-out state of the footrest (200).

2. Seating furniture chassis according to Claim 1, characterized in that the first guide rail (103) has a front end, a rear end and a central region arranged between the front and rear end, wherein the front end and the rear end are arranged lower than the central region.

3. Seating furniture chassis according to the preceding claim, characterized in that the first guide element (102) is arranged at the rear end of the first guide rail (103) in the folded-out state of the footrest (200).

4. Seating furniture chassis according to either of the two preceding claims, characterized in that the first guide element (102) is arranged at the front end of the first guide rail (103) in the folded-in state of the footrest (200).

5. Seating furniture chassis according to one of the preceding claims, characterized in that the first guide element (102) projects through the first guide rail (103).

6. Seating furniture chassis according to one of the preceding claims, characterized in that the seating furniture chassis comprises a second guide rail (108) and a second guide element (107), wherein the second guide element (107) is guided in the second guide rail (108) when the footrest (200) is transferred from the folded-out state into the folded-in state and vice versa, and wherein the second guide rail (108) has the same shape as the first guide rail (103).

7. Seating furniture chassis according to the preceding claim, characterized in that the first guide rail (103) and the first guide element (102) are arranged laterally next to a first end of the seat surface frame (100), and in that the second guide rail (108) and the second guide element (107) are arranged laterally next to a second end of the seat surface frame (100), wherein the first end is arranged opposite the second end.

8. Seating furniture chassis according to one of the preceding claims, characterized in that the seating furniture chassis comprises a third guide element (104) and a fourth guide element (109) and a third guide rail (105) and a fourth guide rail (110), wherein the third guide element (104) and the third guide rail (105) are arranged laterally next to the first end of the seat surface frame (100), wherein the fourth guide element (109) and the fourth guide rail (110) are arranged laterally next to the second end of the seat surface frame (100), wherein the third guide element (104) is guided in the third guide rail (105) and the fourth guide element (109) is guided in the fourth guide rail (110) when the footrest (100) is transferred from the folded-in state into the folded-out state and vice versa, and wherein the third guide element (104) and the fourth guide element (109) and the third guide rail (105) and the fourth guide rail (110) are arranged closer to a rear end region of the seat surface frame (100) than the first guide element (102) and the first guide rail (103).

9. Seating furniture chassis according to the preceding claim, characterized in that the third guide rail (105) and the fourth guide rail (110) each have a front end, a rear end and a central region arranged therebetween, wherein the rear end is arranged lower than the central region and the front end.

10. Seating furniture chassis according to the preceding claim, characterized in that the third guide element (104) is arranged at the rear end of the third guide rail (105) in the folded-out state of the footrest (200), and in that the fourth guide element (109) is arranged at the rear end of the fourth guide rail (110) in the folded-out state of the footrest.

11. Seating furniture chassis according to either of the two preceding claims, characterized in that the third guide element (104) is arranged at the front end of the third guide rail (105) in the folded-in state of the footrest, and in that the fourth guide element (109) is arranged at the front end of the fourth guide rail (110) in the folded-in state of the footrest.

12. Seating furniture chassis according to one of the four preceding claims, characterized in that the third guide element (104) is guided only horizontally and / or downwards when guided in the third guide rail (105) and the fourth guide element (109) is guided only horizontally and / or downwards when guided in the fourth guide rail (110) during the transfer of the footrest (100) from the folded-in state into the folded-out state.

13. Seating furniture chassis according to one of the five preceding claims, characterized in that the third guide element (104) is guided first horizontally and then downwards when guided in the third guide rail (105) and the fourth guide element (109) is guided first horizontally and then downwards when guided in the fourth guide rail (110) during the transfer of the footrest (200) from the folded-in state into the folded-out state.

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