DE202018103213U1 - seating - Google Patents

Abstract

Seating furniture (1), in particular chair, - with a base frame (2), - with a seat part (6), - with a backrest (8) separate from the seat part (6), and - with a rod-like and resilient upper frame (9 ), by means of which the seat part (6) is articulatedly coupled to the underframe (2) and which comprises two frame parts (10) each associated with one side of the seat part (6), each frame part (10) comprising a first control section (14 ) and a second control section (16) pivotally connected to the lower frame (2) and in a respective second hinge point (20) for coupling the seat part (6) to the underframe (2) respectively in a respective first hinge point (18) are hinged to the seat part (6), and wherein each frame part (10) has an intermediate portion (22), by means of which the respective first and second control portions (14,16) are connected, and transverse to a hinge axis direction of the first and second hinge points ( 14,16) and on one side of the seat part (6) is bent like a ring, and the backrest (8) holds articulated.

Description

The invention relates to a chair with a spring-effective designed frame and a seat part and a backrest. Seating furniture is understood to mean, in particular, a chair, for example an office chair, conference chair or the like. The term "frame" is understood to mean an element carrying at least part of the seat, for example a base frame, seat frame or support frame.

Depending on the field of application, seating furniture is usually constructed from various points of view. Typical seating furniture, in particular chairs for use on dining tables, are often comparatively stiff (that is to say hardly springy and / or upright, in particular non-adjustable, backrest). Seating furniture for seats in a relaxed atmosphere, for television, for reading or the like, (often referred to as "lounge furniture"), however, often have a comparatively low-lying seat and a reclined backrest. Regularly, these seats are also formed relatively strong springing.

From these areas, the often referred to as rocking chair or cantilever chair, resilient, resilient or free-swinging chairs are known, which typically have a support or base frame in the form of a curved frame construction of a flexurally elastic material.

Seating for everyday office life, especially office chairs, concrete office swivel chairs, are designed as possible for long and unstressed sitting, but also for an upright posture. Most such office chairs have a so-called synchronous mechanism, which causes by means of a coupling of the backrest with the seat (the "seat part") that at a load and thus a recline of the backrest, the seat part is also moved, usually by the front edge of the seat part is raised , but usually at a smaller angle than the recline of the backrest.

The invention has for its object to provide an improved seating.

This object is achieved by a chair with the features of claim 1. Advantageous and partly inventive embodiments and refinements of the invention are illustrated in the dependent claims and the description below.

The seating invention preferably forms a chair. The chair has a base, which preferably forms or carries a support platform. Furthermore, the seating furniture has a seat part which preferably comprises a seat base support with corresponding (especially a seat forming) seat cushioning, and a seat back separate (i.e., not directly connected to the seat part) backrest. In addition, the seating furniture has a rod-like and resiliently designed upper frame, by means of which the seat part is articulated with the lower frame, in particular with its support platform coupled. This means that the upper frame the intermediate part and the seat part (at least in sections) is interposed. In other words, the upper frame keeps the seat part articulated - not rigid - on the underframe.

The upper frame has two frame parts, each one side - d. H. in particular a left and a right side region - assigned to the seat part and are preferably arranged at least partially laterally to the seat part. Each frame part comprises a first (preferably angled) control section and a second (preferably angled) control section, which are pivotally connected to the base frame and in each case in a respective (ie, the first and the second control section associated) first hinge point for coupling the seat part with the base a respective second hinge point are pivotally hinged to the seat part.

Each frame part further comprises an intermediate portion, by means of which the respective first and second control sections articulation - d. H. in particular not beyond the usual material and structurally inherent elasticity out against each other movable, preferably in one piece, in particular monolithic - are connected. Each of the intermediate sections is bent transversely to a joint axis direction of the first and second hinge points and on one side of the seat part (i.e., each intermediate section on one side, in particular laterally to the seat part). The backrest is held articulated at the two intermediate sections.

Expediently, the four articulation points assigned to the first and second control sections form a type of four-bar chain. Due to the articulated connection of the first and second control sections to the seat part and the undercarriage as well as due to their resilient connection between the control sections, this results in particular in a spring-loaded power transmission between the two control sections and of and / or to the backrest. In particular, under load and thus backward tilt of the backrest (ie inclination of the backrest to the back of the chair out) results - especially due to the preferably relative to the base or the seat part fixed position of the individual pivot points positively controlled - bending of the respective intermediate portion, which in turn affects the control sections due to a leverage effect of the respective intermediate portion. As a result, the seat part is preferably raised and in particular also - at least slightly - tilted. The two frame parts of the upper frame thus advantageously form a synchronous mechanism by simple means.

Particularly preferably, the upper frame, in particular the control sections and the intermediate sections of spring steel wire or tube, formed. Optionally, the upper frame is made of a fiber-reinforced plastic, for example glass or carbon fiber reinforced plastic (in particular duroplastic or thermoplastic). Next optional, the upper frame made of wood, for example, a shaped wood (possibly laminated wood) is formed. Further optionally, the control sections and the intermediate sections can also be manufactured separately from each other and then connected to each other without joints, for example. Welded, bolted, riveted, glued or the like.

In a preferred embodiment, each of the intermediate sections, in particular sections, forms an armrest. In particular, for this purpose, each intermediate section is bent in such a way that at least part of the respective intermediate section extends in a plane above the seat, so that a person sitting on the seat can put his arm on this. Optionally, this part of the intermediate section is widened and / or carries an armrest pad. The fact that in this embodiment, the upper frame also forms the armrests, not only advantageously a functional integration is created, but also - especially in cooperation with the rod-like (eg. By spring steel wire or tube, fiber reinforced plastic or molded wood formed) structure of the upper frame - a visually appealing construction of the chair.

In an expedient embodiment, the articulation axes of the first and second articulation points are transverse, in particular perpendicular to a sagittal plane of the seat. The sagittal plane is understood to mean the plane of the seat that corresponds to its sagittal plane in a seat position of a user of the seat in the intended position. Preferably, the first and second pivot points respectively associated with the first control sections and the second control sections are aligned with one another on both sides of the seat part. This allows a simple movement of the seat part under load the backrest in the vertical direction, in particular without tilting to the right or left.

In a further expedient embodiment, in which the articulation axes are oriented transversely to the sagittal plane, the first articulation points assigned to the undercarriage are offset in a plane direction of the sagittal plane, preferably horizontally (and in particular also in the vertical direction) to the second articulation points assigned to the seat part. For example. are normal parallel to the sagittal plane the points of articulation parallelogram-like arranged, d. H. the sub-frame associated hinge points are each offset in the same direction to the seat part. Preferably, however, the hinge points are not offset by the same distance, so that there is no "right" parallelogram. In particular, by such unequal distances between the respective, the first and second control sections associated articulation points (in particular deviating from a "classic" Parallelogrammführung) tilting of the seat part under load of the back part achieved and in particular be set via a suitable choice of the respective distances.

In particular, in the case of the above-described offset between the respective associated hinge points, the first and second control sections are formed cranked. As a result, each control section preferably forms a double-angled lever whose end pieces are aligned parallel to one another and connected by an obliquely angled connecting piece. In addition, as well as at least a slight spring action on the principle of a torsion bar is made possible, so that, for example, when setting on the seating an elastic compression of the seat part relative to the base occurs.

In a preferred embodiment, the two frame parts of the upper frame, in particular their respective intermediate portion transverse to the sagittal plane (of the chair) seen form an open ring. In particular, the two ends of the intermediate portion are not connected to each other. The open ring structure of the respective intermediate section advantageously results in a high flexibility of the intermediate section in the plane of the ring structure, in particular in contrast to a closed ring structure. Ie. the intermediate portion can deform comparatively easily in the plane of the ring and act as a (return) spring for the backrest when loaded with the weight of the user.

In one embodiment variant - when looking perpendicular to the sagittal plane of the chair - the ring structure of the respective intermediate section is angular (in particular with rounded corners), optionally quadrangular. Preferably, in this case, the intermediate portion is shaped (bent) such that a two corners ( at least approximately) straight portion in the unloaded state of the backrest approximately (ie with minor deviations of less than 10 degrees) is aligned horizontally and thus forms an approximately horizontal shelf (ie the armrest) for a forearm of each user. Alternatively, the intermediate portion is bent rounded over its entire extension, so that in particular at least in the unloaded state of the backrest results in a (nearly or exactly) circular ring structure. The above-described operation of the intermediate portion as a return spring for the backrest and power transmission element between the first and second control sections is given in both variants. The difference lies here in particular in the visual appearance, which may seem futuristic in the case of continuous round bending.

In a further expedient embodiment, the respective intermediate section is aligned substantially or at least in sections with its ring plane substantially (i.e., exactly or with slight deviations of less than 10 degrees) parallel to the sagittal plane. On the one hand, this places the plane of the ring in the plane of the typical load direction on the backrest. On the other hand, the respective intermediate section can thus also be arranged in a simple manner next to the seat part, without disturbing the user of the seat, for example.

Optionally, a section, in particular a rear part of the respective intermediate section, which is arranged in particular rearward of the seat part, inwards to the seat part, d. H. bent in the direction of the other side of the seat part. This part preferably engages behind the backrest or at least a padded backrest surface. In this case, the backrest rests in particular on the two rearward and inwardly bent parts of the two intermediate sections.

In the event that the two intermediate portions extend only in the ring plane (i.e., the rear portion is not bent inward), a backing plate for the backrest (in particular rigidly) is connected to each intermediate portion, for example screwed, welded, glued or the like.

In a further expedient embodiment, the two frame parts in each case via the first control sections and the two second control sections, in particular below the seat part, connected to each other without hinges. In particular, the respective control sections are connected to one another with their ends facing away from the respective intermediate section, for example, in one piece, in particular monolithically formed, or welded, screwed, glued, or the like. In this embodiment, even with uneven loading of the backrest (for example, on the left side stronger than on the right side), a force transmission between the respective corresponding control sections and thereby at least approximately uniform tilting of the backrest and / or the seat part done. In the event that both frame parts (in particular below the seat part) are formed separately from each other, an at least slightly uneven ("oblique") tilting of the backrest and / or the seat part is possible. This can be advantageous for a mobility of the backrest and / or the seat part by several degrees of freedom.

In order to limit a rotation of the respective control section and thus also a backward inclination of the backrest when the backrest is loaded, an abutment piece is formed in an advantageous embodiment on the (or the respective) first or (or the respective) second control section. This is in a designated inclination end position of the backrest on the base frame or the seat part, so that a further rotation of the respective control section is prevented. For example, the end facing away from the respective intermediate portion of the respective first and second control section is angled so that this end itself forms the stop piece. Optionally - for example, even in the event that the two frame parts are connected to each other - the stopper piece is made as a separate part and in particular connected joint-free with the respective control section.

The conjunction "and / or" is to be understood here and below in particular in such a way that the features linked by means of this conjunction can be formed both together and as alternatives to one another.

• 1 in einer Seitenansicht auf ein schematisch skizziertes Sitzmöbel eine Prinzipskizze zu dessen Funktionsweise,
• 2 in einer schematischen, ausschnittsweisen Seitenansicht das Sitzmöbel in einem unbelasteten Zustand einer Rückenlehne des Sitzmöbels,
• 3 in Ansicht gemäß 2 das Sitzmöbel mit belasteter Rückenlehne,
• 4 in einer schematischen Perspektivansicht ausschnitthaft das Sitzmöbel gemäß 2,
• 5 in Ansicht gemäß 4 ein weiteres Ausführungsbeispiel des Sitzmöbels,
• 6 in einer schematischen Ansicht auf eine Unterseite wiederum ein weiteres Ausführungsbeispiel des Sitzmöbels,
• 7 in einer schematischen Ansicht auf eine Rückseite das Sitzmöbel gemäß 6,
• 8 und 9 in Ansicht gemäß 2 bzw. 3 ein weiteres Ausführungsbeispiel des Sitzmöbels,
• 10 in Ansicht gemäß 4 wiederum ein weiteres Ausführungsbeispiel des Sitzmöbels, und
• 11 und 12 in Ansicht gemäß 2 bzw. 3 ein alternatives Ausführungsbeispiel des Sitzmöbels.

Embodiments of the invention will be explained in more detail with reference to a drawing. Show:

• 1 in a side view on a schematically sketched seating a schematic diagram of its operation,
• 2 in a schematic, fragmentary side view of the seating in an unloaded state of a backrest of the chair,
• 3 in view according to 2 the seat with loaded backrest,
• 4 in a schematic perspective view a detail of the seating according to 2 .
• 5 in view according to 4 another embodiment of the chair,
• 6 in a schematic view of a bottom again another embodiment of the chair,
• 7 in a schematic view of a back of the chair according to 6 .
• 8th and 9 in view according to 2 respectively. 3 another embodiment of the chair,
• 10 in view according to 4 again another embodiment of the chair, and
• 11 and 12 in view according to 2 respectively. 3 an alternative embodiment of the chair.

Corresponding parts are always provided with the same reference numerals in all figures.

In 1 is a schematic diagram of a chair, specifically an office swivel chair, in short as "chair 1 ", Shown. The chair 1 has a base 2 on, that is a carrier platform 3 includes. As in 2 indicated, includes the base 2 also a central pivot 4 by means of which the chair 1 around a vertical axis 5 is rotatable. Furthermore, the chair includes 1 a seat part 6 comprising a seat base support (also referred to as a "seat frame"), not shown, and a seat padding mounted thereon 7 having. In addition, the chair includes 1 one of the seat part 6 separate backrest 8th , To connect the seat part 6 with the undercarriage 2 , specifically with the carrier platform 3 includes the chair 1 a rod-like and resilient trained upper frame 9 , The upper frame 9 has two frame parts 10 on, each one side of the seat part 6 assigned, ie left and right of a sagittal plane 12 of the seat part 6 (see. 6 . 7 ; here specifically in the form of the Medianeben shown) are arranged.

Each frame part 10 includes a first angled control section 14 and a second angled control section 16 , These serve for the articulated coupling of the seat part 6 with the undercarriage 2 , specifically with its carrier platform 3 , These are the first and second control sections 14 respectively. 16 each in an associated first hinge point 18 pivotally connected to the carrier platform 3 and in a respective second hinge point 20 pivotally connected to the seat part 6 hinged. Each frame part 10 also includes an intermediate section 22 by means of which the respective first and second control sections 14 respectively. 16 joint-free in power transmission connection.

As well as out 6 can be seen, are joint axes 24 the first and second joint points 18 respectively. 20 perpendicular to the sagittal plane 12 of the chair 1 , The intermediate sections 22 are doing transverse to the joint axes 24 aligned and laterally to the seat part 6 bent like a ring. In the present embodiment, the intermediate sections 22 bent approximately square (looking at the side of the chair 1 ). How out 1 also can be seen, are the intermediate sections 22 looking at the side of the chair 1 bent into an open ring. Thus, the two ends of the intermediate sections 22 not connected.

The intermediate sections 22 also form an armrest of the chair 1 ,

The two frame parts 10 are in the present embodiment in one piece (monolithic) made of a spring steel wire. How out 1 and 6 it can be seen, are the respective joint points 18 respectively. 20 formed by a kind of sleeve in which the respective control section 14 respectively. 16 is received rotatably. To slip out of the control sections 14 respectively. 16 To prevent these sleeves, they are secured in an optional embodiment by retaining rings in the sleeves.

The backrest 8th is in the present embodiment by means of a at the respective intermediate section 22 connected carrier plate 26 at the two intermediate sections 22 held articulated.

Such as In 1 . 2 and 6 It can be seen that the first points of articulation are 18 in a horizontal plane below to the second hinge points 20 arranged and to a back 28 set back. The first and second control sections 14 respectively. 16 are designed cranked, so that in each case a section through the respective hinge point 18 respectively. 20 , Specifically, the respective sleeve is running. The distance of the rear first pivot point 18 to the rear second hinge point 20 is also smaller than the distance between the front articulation points 18 respectively. 20 ,

The four, one side of the chair 1 associated hinge points 18 and 20 thus form a four-jointed chain. When loading the backrest 8th it leans towards the back 28 back in 1 shown by dashed lines - whereby the intermediate sections 22 be bent elastically. Due to this elastic deformation becomes part of the inclination of the backrest 8th from the two frame parts 10 added. Due to the coupling of the first control sections 14 with the second control sections 16 (by means of the intermediate sections 22 ), these are due to the leverage effect of the respective intermediate section 22 also in their joints 18 respectively. 20 twisted. The aforementioned four-bar chain leads to a kind of parallelogram guide between the support platform 3 and the seat part 6 so that the seat part 6 is raised. Because of the unequal distance between the front articulation points 18 and 20 and the rear pivot points 18 and 20 becomes the seat part 6 thereby slightly inclined, specifically with its leading edge higher than with its trailing edge (s. 1 ; different long, upward arrows). Due to the elastic deformation of the intermediate sections 22 These also form a return spring for moving the backrest 8th back to the unloaded position.

As in 4 shown, are the two frame parts 10 formed separately from each other. In this illustration are the seat part 6 and the backrest 8th for the sake of clarity only indicated by dashed lines.

In a further embodiment, shown in FIG 5 is at the control sections 16 a stop piece 30 molded, specifically in the form of a (in the unloaded state of the backrest 8th ) approximately downwardly bent wire section. When loading the backrest 8th beats this stop piece 30 at the carrier platform 3 and thus restricts the recline of the backrest 8th and the degree of tilting of the seat part 6 ,

In a further embodiment, shown in FIG 6 and 7 , are the first control sections 14 both frame parts 10 and the second control sections 16 both frame parts 10 joint-free, concretely connected in one piece.

In 8th and 9 is an alternative embodiment of the chair 1 in the unloaded and loaded condition of the backrest 8th shown. In this case, the respective intermediate section 22 bent in the rear area such that the second control section 16 on an inward to the seat part 6 directed side into the intermediate section 22 passes. A free (ie the transition to the intermediate section 22 remote end) of the second control section 16 is thus outside of the seat part 6 , Thus, the intermediate section 22 in its rear region - in the present embodiment, for example, below the support plate 26 , at least below the backrest 8th - inwards to the seat part 6 bent.

A comparable embodiment is in 10 shown. Here are both intermediate sections 22 in its rear area bent so that it is the backrest 8th engage behind. This allows the carrier plate 26 for connecting the backrest 8th also omitted.

Yet another embodiment of the chair 1 is in 11 and 12 shown. Here are the intermediate sections 22 bent all the way round to a circular armrest.

The object of the invention is not limited to the embodiments described above. Rather, other embodiments of the invention may be derived by those skilled in the art from the foregoing description. In particular, the individual features of the invention described with reference to the various exemplary embodiments and their design variants can also be combined with one another in a different manner.

LIST OF REFERENCE NUMBERS

1

Seat

2

undercarriage

3

carrier platform

4

rotary leg

5

vertical axis

6

seat part

7

Sitzbepolsterung

8th

backrest

9

upper frame

10

frame part

12

sagittal plane

14

first control section

16

second control section

18

first pivot point

20

second hinge point

22

intermediate section

24

joint axis

26

support plate

28

back

30

stop piece

Claims (10)

Seating furniture (1), in particular chair, - with a base frame (2), - with a seat part (6), - with a backrest (8) separate from the seat part (6), and - with a rod-like and resilient upper frame (9 ), by means of which the seat part (6) is articulatedly coupled to the underframe (2) and which comprises two frame parts (10) each associated with one side of the seat part (6), each frame part (10) comprising a first control section (14 ) and a second control section (16), the for coupling the seat part (6) to the underframe (2) in each case in a respective first hinge point (18) pivotally articulated to the lower frame (2) and in a respective second hinge point (20) articulated to the seat part (6), and wherein each frame member (10) has an intermediate portion (22) by means of which the respective first and second control portions (14, 16) are connected, and transverse to a hinge axis direction of the first and second hinge points (14, 16) and on one side of the seat portion (6) is bent like a ring, and the backrest (8) holds articulated. Seating furniture (1) Claim 1 , wherein each of the intermediate sections (22) forms an armrest in sections. Seating furniture (1) Claim 1 or 2 wherein the hinge axes (24) of the first and second hinge points (18, 20) are transverse to a sagittal plane (12) of the chair (1). Seating furniture (1) Claim 3 in which the first pivot points (18) assigned to the underframe (2) are arranged offset in the plane direction of the sagittal plane (12) to the second pivot points (20) assigned to the seat part (6). Seating furniture (1) Claim 4 , wherein the first and second control sections (14,16) are formed cranked. Seating furniture (1) according to one of Claims 1 to 5 , wherein the two frame parts (10) of the upper frame (9) form an open ring transversely to the sagittal plane (12). Seating furniture (1) according to one of Claims 1 to 6 , Wherein the respective intermediate portion (22) is completely or partially aligned with its ring plane substantially parallel to the sagittal plane (12). Seating furniture (1) according to one of Claims 1 to 7 wherein a portion of the respective intermediate portion (22) is bent inwardly toward the seat portion (6). Seating furniture (1) according to one of Claims 1 to 8th , wherein the two frame parts (10) in each case via the first control sections (14) and the two second control sections (16) are connected to each other without articulation. Seating furniture (1) according to one of Claims 1 to 9 , wherein on the first or the second control portion (14,16) a stop piece (30) is formed, which abuts in a proper inclination end position of the backrest (8) on the base frame (2) or the seat part (6) and thereby a further rotation of the respective control section (14,16) prevents.

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