Seat chassis

Abstract

A seating furniture chassis comprises a seat surface frame, a backrest frame, two armrests, and a drive mechanism. The backrest frame is pivotable about a virtual pivot axis defined by two pivot points, wherein the backrest frame is fastened to the pivot points on the armrests. The drive mechanism is connected to the backrest frame by a translation mechanism. The drive mechanism is designed to trigger a translation of the translation mechanism, wherein the translation is converted into a pivoting movement of the backrest frame about the pivot axis. The backrest frame is connected below the pivot points to the seat surface frame so that during the pivoting movement the seat surface frame is moved translationally. The drive mechanism is arranged below a first lateral edge region of the seat surface frame.

Claims

1. A seating furniture chassis, comprising: a seat surface frame having a first lateral edge region; first and second armrests with respective first and second pivot points defining a pivot axis; a backrest frame connected to the first and second pivot points and pivotable about the pivot axis, and connected to the seat surface frame below the first and second pivot points; a translation mechanism; a drive mechanism arranged below the first lateral edge region of the seat surface frame, wherein the drive mechanism is connected to the backrest frame by the translation mechanism and configured to trigger a translation of the translation mechanism to cause a pivoting movement of the backrest frame about the pivot axis such that the seat surface frame is moved translationally; guide members arranged below the first and second armrests, wherein the guide members include an elongated, curved portion having a direction of curvature extending lengthwise from the seat surface frame upward to the armrests; and guide elements guided on the elongated, curved portion of the guide members to guide the seat surface frame during the translation of the translation mechanism, wherein the guide elements, during the translation of the translation mechanism, have a direction of movement which corresponds to the direction of curvature of the guide members.

2. The seating furniture chassis of claim 1, wherein the guide members are curved forward upward.

3. The seating furniture chassis of claim 1, wherein the guide elements are arranged next to a front region of the seat surface frame.

4. The seating furniture chassis of claim 1, wherein the guide elements are shaped like rollers.

5. The seating furniture chassis of claim 1, wherein the translation mechanism is fastened to a lower end of the backrest frame.

6. The seating furniture chassis of claim 1, wherein the seat surface frame is fastened on the backrest frame between the translation mechanism and the first and second pivot points.

7. The seating furniture chassis of claim 1, wherein the translation mechanism comprises a threaded rod.

8. The seating furniture chassis of claim 1, wherein the first and second pivot points are arranged on the pivot axis.

9. The seating furniture chassis of claim 1, wherein the drive mechanism is arranged below a rear region of the seat surface frame.

10. The seating furniture chassis of claim 1, wherein the drive mechanism is connected to a bracket arranged below the seat surface frame, wherein the bracket is securely connected to the seat surface frame.

11. The seating furniture chassis of claim 1, further comprising a further drive mechanism arranged below a second lateral edge region of the seat surface frame, which is arranged opposite the first lateral edge region.

12. Seating furniture, comprising: the seating furniture chassis of claim 1; and upholstery fastened to the seating furniture chassis.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other features and advantages of the disclosed apparatus 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 having the same or similar functions.

(2) FIG. 1 is a perspective view in schematic form of a seating furniture chassis in a first position in accordance with one embodiment;

(3) FIG. 2 shows a detail from FIG. 1 that is denoted by R;

(4) FIG. 3 is a perspective view in schematic form of the seating furniture chassis from FIG. 1 in a second position;

(5) FIG. 4 shows a detail from FIG. 3, which is denoted by R; and

(6) FIG. 5 is a perspective view in schematic form of the seating furniture chassis from FIG. 1.

DETAILED DESCRIPTION

(7) Referring to FIGS. 1 and 5, the seating furniture chassis 100 comprises a seat surface frame 101, a backrest frame 102, and two armrests 103. The armrests 103 are fastened to fastening points 104 on the backrest frame 102. The seat surface frame 101 is connected to the lower end of the backrest frame 102. When the backrest frame 102 is pivoted, the two fastening points 104 define the geometric pivot axis.

(8) As shown in detail in FIGS. 2 and 4, in both lateral regions below the seat surface frame 101, there is arranged in each case a drive mechanism 200, which is connected to the backrest frame 102 by a translation mechanism 201, for example, a threaded rod. The drive mechanism 200 is designed to trigger a translation of the translation mechanism 201. In this way, a translation of the translation mechanism 201 is converted into a pivoting movement of the backrest frame 102 owing to the connection with the backrest frame 102.

(9) During the pivoting movement of the backrest frame 102, the seat surface frame 101 is moved translationally. When the upper region of the backrest frame 102 is pivoted rearward, the seat surface frame 101 is moved forward, as shown in FIGS. 3 and 4. When the upper region of the backrest frame 102 is pivoted forward, the seat surface frame 101 is moved rearward, and shown in FIGS. 1 and 2.

(10) During the movement, the seat surface frame 101 is guided by guide elements 106 that are guided in guide members 105. The guide members 105 are formed so as to be curved and are arranged below the armrests 103. The guide members 105 are fastened directly to the armrests 103. The guide elements 106 are arranged laterally on the outside of the seat surface frame 101. As a result of the guide elements 106 being guided in the guide members 105, the seat surface frame 102 is raised forward during a movement and is lowered rearward during a movement.

(11) The arrangement of the drive mechanism 200 in lateral edge regions directly below the seat surface frame 101 is advantageous, since such an arrangement is particularly space efficient. Very little installation space is required. Thus, there is a lot of room below the seat surface frame 101; and the drive mechanisms 200 are concealed during normal operation or can be seen by a user only with effort, so that they do not affect or only insignificantly affect the aesthetic appearance of the piece of furniture for sitting.