Search

EP-4740791-A1 - SEATING

EP4740791A1EP 4740791 A1EP4740791 A1EP 4740791A1EP-4740791-A1

Abstract

The invention relates to a piece of seating furniture (10) comprising: a first chair leg (12), a first adjustment unit (14), a first contact surface (16), a second contact surface (18), wherein the first adjustment unit (14) is configured to mount the first contact surface (16) slidably along the first chair leg (12), wherein the first chair leg (12) is configured to provide a change in a relative position (20) between the first contact surface (16) and the second contact surface (18), wherein the relative position (20) comprises at least a seat depth adjustment (22) between the first contact surface (16) and the second contact surface (18).

Inventors

  • BARTH, ULRICH
  • Schwarzpaul, Levin Waitangi

Assignees

  • Rocket Edu GmbH

Dates

Publication Date
20260513
Application Date
20251111

Claims (15)

  1. Seating furniture (10) comprising: - a first chair leg (12), - a first adjustment unit (14), - a first lying surface (16), - a second lying surface (18), wherein the first adjustment unit (14) is configured to mount the first support surface (16) slidably along the first chair leg (12), wherein the first chair leg (12) is configured to provide a change in a relative position (20) between the first support surface (16) and the second support surface (18), wherein the relative position (20) includes at least a seat depth adjustment (22) between the first support surface (16) and the second support surface (18).
  2. Seating furniture (10) according to claim 1, wherein the relative position (20) comprises at least a height adjustment (24) between the first lying surface (16) and the second lying surface (18).
  3. Seating furniture (10) according to one of the preceding claims, wherein the seating furniture (10) has a second adjustment unit (26), wherein the second contact surface (18) is connected to the second adjustment unit (26), wherein the first adjustment unit (14) is displaceable along a first path (28) on the first chair leg (12), wherein the second adjustment unit (26) is displaceable along a second path (30) on the first chair leg (12), wherein a first orientation of the first path (28) and a second orientation of the second path (30) are arranged to provide the seat depth adjustment (22).
  4. Seating furniture (10) according to claim 3, wherein the first orientation of the first path (28) differs from the second orientation of the second path (30).
  5. Seating furniture (10) according to one of claims 3 to 4, wherein the first alignment of the first path (28) are aligned at a predetermined angle to each other to provide the seat depth adjustment (22).
  6. Seating furniture (10) according to claim 5, wherein the predetermined angle lies within an angular range between 2° and 30°.
  7. Seating furniture (10) according to one of the preceding claims, wherein the first chair leg (12) has a predetermined contour (32), wherein the first predetermined contour (32) is configured to define the change in the relative position (20) between the first contact surface (16) and the second contact surface (18).
  8. Seating furniture (10) according to claim 7, wherein the first predetermined contour (32) is configured to arrange the first lying surface (16) and/or the second lying surface (18) in a ratio between a seat height (34) of the seating furniture (10) and a seat depth (36) of the seating furniture (10).
  9. Seating furniture (10) according to claim 8, wherein the ratio has a plurality of sub-areas (36), each sub-area (36) having a predetermined seat depth range and a predetermined height range.
  10. Seating furniture (10) according to claim 9, wherein each sub-area (36) represents a size class of the seating furniture (10), wherein the size classes of the seating furniture (10) are defined according to DIN EN 1729-1:2015, DIN EN 1729-1:2015/AC:2016 and/or DIN EN 1729-2:2023.
  11. Seating furniture (10) according to one of claims 7 to 10, wherein the first chair leg (12) has a first section (38) and a second section (40), wherein the first section (38) and the second section (40) are arranged at a predetermined angle to each other in order to form the first predetermined contour (32).
  12. Seating furniture (10) according to one of claims 6 to 11, wherein the seating furniture (10) has a second chair leg (42) which has a second predetermined contour (44), wherein the first predetermined contour (32) and the second predetermined contour (44) are essentially the same.
  13. Seating area (200) featuring: - a piece of seating furniture (10) according to one of claims 1 to 12, - a height-adjustable table (100), wherein the height-adjustable table (100) is configured to move a tabletop (102) of the height-adjustable table (100) in a predetermined area (104), wherein the seating furniture (10) is configured to provide a change in a relative position (20) between a first contact surface (16) and a second contact surface (18) of the seating furniture (10) for a plurality of sitting and/or reclining positions in the predetermined area (104), wherein the relative position (20) includes at least a seat depth adjustment (22).
  14. Method for manufacturing a piece of seating furniture (10) according to one of claims 1 to 12, comprising the steps: - Providing a chair leg (12), - Forming at least one adjustment means in the chair leg (12) so that the first adjustment unit (14) can be arranged in different positions on the chair leg (12), - Aligning a first path (28) of the chair leg (12) to a second path (30) of the chair leg (12) to provide a seat depth adjustment (22) of the seating furniture (10).
  15. Use of a seating furniture (10) according to one of claims 1 to 12, in particular in combination with a height-adjustable table (100), to form a seating option by means of the seating furniture (10) and/or as a backrest option by means of the seating furniture (10).

Description

The present invention relates to a piece of seating furniture and a seating group. Currently, there are numerous different solutions for adjusting the height of seating surfaces in furniture. Due to the increasing number of height-adjustable desks in schools, the need for innovative and robust seating solutions is growing. Disclosure of the invention The embodiment of the invention advantageously provides an improved seating furniture. The invention is defined in the independent claims. Advantageous further developments of the invention are described in the dependent claims and the following description. An advantage of the seating furniture with the features of claim 1 is that the seat depth of the seating furniture can be continuously adjusted, particularly depending on the seat height. Thus, even with varying backrest heights, seat depth adjustment is possible, thereby improving the ergonomics for the user of the seating furniture. This allows the seating furniture to remain usable for several years, especially during growth phases of, for example, students, and also supports or enhances dynamic work in educational institutions. Furthermore, it is particularly advantageous that movement and posture-related damage can be specifically prevented. According to the invention, this is achieved by the seating furniture comprising a first chair leg, a first adjustment unit, a first contact surface, and a second contact surface, wherein the first adjustment unit is configured to mount the first contact surface slidably along the first chair leg, and wherein the first chair leg is configured to provide a change in the relative position between the first contact surface and the second contact surface, the relative position comprising at least a seat depth adjustment between the first contact surface and the second contact surface. In other words, the distance between the front edge of a seat surface and the center point of the backrest surface can be adjusted to provide seat depth adjustment. This allows for improved ergonomics of the seating furniture. For example, the seating furniture can have a first leg on which the first adjustment unit is slidably mounted. Preferably, by sliding the first adjustment unit, the first support surface can be moved relative to the second support surface, thus enabling a change in position between the first and second support surfaces. This change in position between the first and second support surfaces allows for seat depth adjustment. Preferably, the first adjustment unit can be configured to mount the first contact surface slidably along a first chair leg, wherein the first adjustment unit can be configured to lock a first displacement between the first contact surface and the first chair leg by means of a first rotation of the first contact surface into a first orientation of the first contact surface, wherein the first adjustment unit can be configured to release the first displacement between the first contact surface and the first chair leg by means of a second rotation of the first contact surface into a second orientation of the first contact surface. This allows for seat height adjustment based on seat depth. Body height is essentially proportional to thigh length. Since taller individuals require a higher seating position, they also need a deeper seat, specifically a distance between the seat back and the front edge of the seat that corresponds to their thigh length. A similar principle applies to shorter individuals, but in reverse. In taller individuals, gravity could compress blood vessels on an inappropriately short front edge of the seat. Shorter individuals require a shorter seat, otherwise they cannot reach the backrest when their knees are bent. These situations can be improved using the first adjustment unit and by changing the relative positions. Preferably, the seat depth can be adjusted with just a few movements using the first adjustment unit. This eliminates the need for complex mechanisms. Furthermore, operation can be intuitive if the adjustment unit is adjustable via rotations. The dependent claims describe preferred embodiments of the invention. Preferably, the relative position includes at least a height adjustment between the first contact surface and the second contact surface. One advantage of this design is that, in addition to the seat depth, the seat height can also be adjusted for a given size class or age group, thus increasing the life cycle of the seating furniture. Preferably, the seating furniture has a second adjustment unit, wherein the second contact surface is connected to the second adjustment unit, wherein the first adjustment unit is movable along a first path on the first chair leg, wherein the second adjustment unit is movable along a second path on the first chair leg, wherein a first alignment of the first path and a second alignment of the second path are arranged to provide the seat depth adjustment. An advantage of this emb