CN117355240A

CN117355240A - Active dynamic seat furniture

Info

Publication number: CN117355240A
Application number: CN202280030765.2A
Authority: CN
Inventors: A·多布里克
Original assignee: Ellis Inc
Current assignee: Ellis Inc
Priority date: 2021-04-26
Filing date: 2022-01-24
Publication date: 2024-01-05
Also published as: WO2022228736A1; US20240237827A1; EP4329561A1; DE102021110612A1

Abstract

The invention relates to a spring support (1) for a rocking chair (100), comprising a central cylindrical central shaft (10) which is mounted in an axially movable manner on a plurality of guide elements (30) in a shaft cage (20), the shaft cage (20) being receivable in a cylindrical fixing sleeve (40) with an inner jacket (41), wherein the guide elements (30) each have a spring body (31) on which spring retaining arms (32) each having a clamping contour (K) are provided, and rollers (34) which are rotatably mounted on a shaft (33), wherein the shaft cage (20) for elastically mounting the spring bodies (31) each form a recess (21), the spring bodies (31) being mounted in a clamping manner in the recesses (21) and the respective spring bodies (31) being supported in a clamping manner by means of their clamping contours (K) on the opposite contours of the shaft cage (20).

Description

Active dynamic seat furniture

Technical Field

The present invention relates to seating furniture, in particular active dynamic seating furniture according to claim 1. The invention relates in particular to active dynamic seating furniture with improved spring struts.

Background

Various seating furniture are known in the prior art, which are designed in such a way that the body sits in an anatomically as comfortable position as possible due to a properly designed seating surface and backrest. While such seating furniture is generally considered to be pleasant and comfortable, it has significant drawbacks. Sitting on such seating furniture is passive, i.e. the muscles of the back are hardly subjected to any pressure, while the intervertebral discs are subjected to static pressure. Thus, disc wear, back muscle degeneration, health damage, and pain may occur.

For this purpose, dynamic, in particular active, seating arrangements have been developed which enable an active, dynamic sitting position in comparison to passive seating. During active dynamic sitting, the back muscles and intervertebral discs are always in a slightly active state. When sitting on an active dynamic seating device, the seat user needs to, for example, balance the seat with the body and perform a swinging motion, as well as perform a vertical vibration to simulate a "up and down" motion while walking and running.

For example, office chairs are provided in the form of a rocking stool (pendelhocer). Rocking stool known on the market as Swopper. Office chairs are usually provided with star-shaped bases, the ends of which are provided with rollers. The mobility of office chairs is essentially limited by the height adjustment using gas springs and the suspension of the back rest or seat surface. Furthermore, there are complex mechanical systems, which are expensive to produce, sometimes too complex, and only allow a limited degree of dynamic sitting.

A rocking stool is known from EP 0 808 116, in which a rocking movement is made possible by rubber elements arranged between the foot and the leg. The foot consists of a split ring attached to the leg by a radially extending cross member such that the leg is held in a generally predetermined position, typically at the center of the slotted ring. With this stool, the supporting movement occurs simultaneously by the rubber bumper on the floor during the swinging movement caused by the rubber joint mounted between the leg and the radial cross member.

To achieve an up-and-down swing that facilitates dynamic loading of the spine, prior art swing stools also have springs, such as coil springs, in or on the legs.

DE-GM 731114 describes an active dynamic seat device having a seat part connected via a first tilting joint to a support shaft which in turn is hinged to the foot of the seat device by a second tilting joint. Wherein each tilt joint preferably comprises a dome formed at the end of the support shaft, which dome is guided in the hollow cylinder and is loaded by a helical spring arranged in the hollow cylinder.

Mass and active dynamic seating experience require particularly efficient and durable moving parts designs. In particular, the invention aims at a play-free oscillation, which should also occur without noise. These properties should be ensured not only during vertical deflection but also during the oscillating movement up to at least 15 ° deflection.

Disclosure of Invention

It is therefore an object of the present invention to overcome the known drawbacks of rocking stools and chairs and to create an improved design with spring struts.

This object is achieved by a combination of features according to claim 1.

To this end, the invention provides a spring support for a rocking chair, comprising a central cylindrical central shaft which is mounted axially displaceably on a plurality of guide elements in a shaft cage which can be accommodated in a cylindrical, fixed sleeve with an inner jacket, wherein the guide elements each have a spring body on which spring retaining arms are provided, each having a clamping contour, and rollers rotatably mounted on the shaft, wherein the shaft cage for elastically mounting the spring bodies respectively forms a recess (opening) in which the spring bodies are mounted in a clamping manner and by means of their clamping contours the respective spring bodies are supported in a clamping manner on the opposite contour of the shaft cage.

Due to the special design of the spring body, it is ensured that the roller is mounted in a clamped state for tensioning the central shaft. The length, shape and form of the spring arm are chosen so that the desired degree of freedom of play is achieved by a certain spring force.

An advantageous design provides that the clamping profile is designed as a holding lug protruding from the holding arm, which preferably forms a contact surface or undercut on one side. Advantageously, the opposite contours provided on the shaft cage for the clamping and holding arms are each realized by edges on the respective recess, in particular inwardly directed edges, i.e. edges forming a transition from the inner surface of the shaft cage to the side surfaces of the respective recess.

Further advantageously, the recesses for receiving the spring bodies each have a substantially rectangular central opening cross section, which adjoins two laterally diametrically opposed recess regions extending in the circumferential direction for receiving the retaining arms, which recess regions have a lower height than in the region of the central opening cross section, in particular when viewed in the axial direction.

In an advantageous embodiment of the invention, it is provided that the central shaft has a section at one end for attachment to or in a wobble joint.

In a likewise preferred embodiment of the invention, a first set of guide elements (e.g. four guide elements) is mounted in recesses arranged in the circumferential direction in a first (lower) assembly region (lower assembly layer) of the shaft cage.

Spaced apart from this in the axial direction, a second set of guide elements (for example likewise four guide elements) is mounted in further recesses arranged in the upper assembly region in the circumferential direction. This results in two radially encircling bearing sections for the central shaft, which are spaced apart from each other in the axial direction and thus facilitate play-free and low-noise mounting of the central shaft.

In a likewise advantageous embodiment, three or four guide elements are arranged in the circumferential direction in a common assembly plane of the shaft cage, preferably at an angular distance of 120 ° or 90 °. For example, in the case of four guide elements, they may be distributed in the circumferential direction at the positions of 3 o 'clock, 6 o' clock, 9 o 'clock and 12 o' clock.

In a further, likewise advantageous embodiment of the invention, the recess has an opening through which the spring retaining arm extends at least via one section.

It is further preferred that the two retaining arms are connected in one piece with the spring body via arcuate sections on diametrically opposite sides of the spring body, the retaining arms extending radially outwards when the spring body is in the assembled state.

It is also advantageous if the bearing section of the spring body is designed as a part-cylindrical surface, preferably with a radius of curvature corresponding to the radius of the cylindrical inner jacket of the fixing sleeve, and the spring body in the assembled state is arranged completely within the envelope of the shaft cage tensioned by the outer jacket.

It is also advantageous if, in addition to the respective recess, a bearing seat is provided on the shaft cage as a counter bearing for the resilient holding arm, so that the holding arm is resiliently supported by lateral support surfaces facing away from the respective spring body when the guide element is actuated by the fixing sleeve into its assembled position. Wherein the retaining arms are pressed together from their preassembled position. Depending on the spring geometry, material and spring characteristics of the spring arm, the desired spring force can be obtained.

Another aspect of the invention relates to a rocking chair having a seat portion and a foot portion arranged with a rocking joint and a spring strut equipped with a helical spring, said spring strut being designed with the features described above, wherein said spring strut is fastened by one of its ends to said rocking joint.

In addition to the spring struts, a further aspect of the invention relates to a method for assembling such a spring strut, having at least the following steps:

a. mounting the plurality of guide elements externally through the opening or the recess of the shaft cage such that the rollers of the guide elements are each aligned with a predetermined position of the central shaft, an

The guide element (30) is clamped by means of its retaining arms (32) to the opposite contour of the shaft cage (20). Preferably the central shaft is inserted afterwards. In particular, due to this smart design of the shaft cage, the guiding element can remain in the desired clamping position even without the central shaft.

Drawings

Further advantageous refinements of the invention are characterized in the dependent claims or are shown in more detail in the following description of a preferred embodiment of the invention in conjunction with the description with reference to the accompanying drawings.

The drawings show:

fig. 1 is a perspective view of a guide element according to the invention in an unassembled state;

fig. 2 is a perspective view of the guide element according to the invention shown in fig. 1 in an assembled state;

fig. 3 is a cross-sectional view of a guide element according to the invention in an unassembled state;

fig. 4 is a cross-sectional view of a guide element according to the invention in an assembled state;

fig. 5 is a rear perspective view of the guide element according to the invention of fig. 2.

FIG. 6 is a side view of a spring strut according to the present invention;

FIG. 7 is a cross-sectional view taken along section 6A-A of FIG. 6;

FIG. 8 is a cross-sectional view of the spring support according to FIG. 6;

FIG. 9 is a cross-sectional view taken along section B-B of FIG. 6;

FIG. 10 is a state of the components of the spring strut in a preassembled position according to the present invention;

fig. 11 is a cross-sectional view through section A-A of fig. 10 to illustrate assembly of the guide element.

Detailed Description

The invention is explained in more detail below with reference to fig. 1 to 11, in which like reference numerals denote like functional and/or structural features.

The guide element 30 is first shown in fig. 1 to 5. Each guide element 30 has a spring body 31 on which two resilient holding arms 32 are provided. Further, a shaft 33 is attached to the spring body 31, on which shaft a rotatably mounted roller 34 is assembled.

The two resilient holding arms 32 have sections 32a which in the assembled state extend through openings in the shaft cage 20, as shown in fig. 9. The holding arm has a clamping profile K shown in fig. 4. The clamping contour K forms at least an outwardly projecting nose 37. By means of this nose 37, the retaining arms 32 clamp in the assembled state against the inner edges 24 of the respective recesses 21, as can be seen clearly in fig. 11 (before assembly) and fig. 9 (after assembly).

Fig. 5 shows a rear perspective view of the guide element 30 to show the section 35. For this purpose, the section 35 of the spring body 31 is "convexly" curved, i.e. designed as a part-cylindrical surface with a radius of curvature corresponding to the radius of the cylindrical shaft cage, so that the spring body 31 is arranged inside the envelope of the outer jacket of the shaft cage 20 when assembled, as shown in fig. 9.

Fig. 6 shows a side view of the spring support 1. The spring strut 1 comprises a central cylindrical central shaft 10 which is mounted in an axially movable manner in a shaft cage 20 on upper and lower guide elements 30. Four guide elements 30 are arranged in each assembly layer M1, M2.

A fixing sleeve 40 is arranged around the shaft cage 20 and accommodates the shaft cage 20 and the guide element 30. In the assembled state, the guide element 30 rests entirely against the cylindrical inner jacket 41 of the fixing sleeve 40.

As shown in particular in fig. 10, the shaft cage 20 has a recess 21 for elastically mounting the spring bodies 31, the spring bodies 31 being assembled in a clamping manner in the recess 21, and the individual spring bodies 31 being supported in a clamping manner with their clamping profiles K on the opposite profile (inner edge 24) of the shaft cage

There is a first set of four guide elements 30, each arranged offset from each other by 90 ° in the circumferential direction, in particular assembled in a receptacle 21 provided in the lower mounting area M1 of the shaft cage 20. Likewise, the second set of four guide elements 30 are mounted in receptacles 21 provided in the upper mounting region M1 of the shaft cage 20.

Four lugs N attached to the corners protrude from the bearing sections 35 of the respective spring bodies 31.

The receptacle or recess 21 is at least partially designed as an opening, so that the resilient holding arm 32 can extend at least in sections 32a through the opening (see the shape in fig. 10).

The practice of the invention is not limited to the preferred exemplary embodiments given above. On the contrary, variants are conceivable, which utilize the proposed solution even if they have a radically different design.

Claims

1. Spring support (1) for a rocking chair (100), comprising a central cylindrical central shaft (10) which is mounted so as to be axially movable on a plurality of guide elements (30) in a shaft cage (20), the shaft cage (20) being receivable in a cylindrical fixing sleeve (40) with an inner jacket (41), wherein the guide elements (30) each have a spring body (31) on which spring retaining arms (32) each having a clamping contour (K) are provided, and rollers (34) which are rotatably mounted on a shaft (33), wherein the shaft cage (20) for elastically mounting the spring bodies (31) each form a recess (21), the spring bodies (31) being mounted in a clamping manner in the recesses (21) and the respective spring bodies (31) being supported in a clamping manner by their clamping contours (K) on the opposing contours of the shaft cage (20).

2. Spring strut (1) according to claim 1, characterized in that the clamping profile (K) is designed as a holding lug (37) protruding from the holding arm (32).

3. Spring strut (1) according to claim 1 or 2, characterized in that the relative contours provided on the shaft cage (20) for clamping the retaining arms (32) are each realized by an edge (24), in particular an inwardly directed central edge (24), on the respective recess (21).

4. Spring strut (1) according to one of the preceding claims, characterized in that the recesses (21) for accommodating spring bodies (31) each have a substantially rectangular central opening cross section, which adjoins two circumferentially extending laterally diametrically opposed recess regions for receiving the retaining arms, in particular which have a lower height when viewed in the axial direction than in the region of the central opening cross section.

5. Spring strut (1) according to any one of the preceding claims, wherein the central shaft (10) has a section (11) at one end for attachment into a swing joint or in a swing joint.

6. Spring strut (1) according to any one of the preceding claims, characterized in that a first set of guide elements (30) is each mounted in a clamping manner in a recess (21) arranged in a first (lower) mounting region (M1) of the shaft cage (20) in the circumferential direction, and a second set of guide elements (30) is each mounted in a clamping manner in a further recess (21) in a second (upper) mounting region (M2) axially spaced apart relative to the first mounting region (M1) in the circumferential direction.

7. Spring strut (1) according to any one of the preceding claims, characterized in that three or four guide elements (30) are arranged in recesses (21) mounted in the circumferential direction in a common assembly plane of the shaft cage (20), preferably at an angular distance of 120 ° or 90 °.

8. Spring strut (1) according to one of the preceding claims, characterized in that the recess (21) is designed as an opening and the elastic retaining arm (32) extends through the opening at least through one section (32 a).

9. Spring strut (1) according to any one of the preceding claims, characterized in that two retaining arms (32) on opposite sides of the spring body (31) are connected in one piece with the spring body by means of arcuate sections (32 b), the spring body (31) being arranged in the envelope of the shaft cage (20) formed by the outer jacket in this region in the assembled state.

10. Swing chair having a seat part and a foot part arranged with a swing joint and a spring leg (1) equipped with a helical spring, which is designed with the features according to any of the preceding claims, wherein the spring leg (1) is fastened to the swing joint by one of its ends.

11. Method for assembling a spring strut (1) according to any one of claims 1 to 10, said method having at least the following steps:

a. mounting the plurality of guide elements (30) externally through the recess (21) of the shaft cage (20) such that the rollers (34) of the guide elements (30) are each aligned with a predetermined position of the central shaft, and

b. the guide element (30) is clamped by means of its retaining arms (32) to the opposite contour of the shaft cage (20).