DE102016217502A1 - Connection arrangement for one or in a chair, method for producing a connection arrangement, chair - Google Patents

Abstract

The present invention relates to a connection arrangement for or in a chair, in particular a conference or office chair, comprising: a armrest support; a backrest support; and a bearing pin fixed in the armrest support and rotatably coupling the armrest support to the backrest support. The present invention further relates to a method of this and a chair with such a connection arrangement.

Description

Connection arrangement for one or in a chair, method for producing a connection arrangement, chair

FIELD OF THE INVENTION

The present invention relates to a connection arrangement for or in a chair, in particular conference or office chair, a method for producing such a connection arrangement and a chair with such a connection arrangement.

TECHNICAL BACKGROUND

Although the present invention, as well as its underlying problem is described below in relation to office swivel chairs closer, it is not limited thereto, but on a variety of chairs, especially conference or office chairs, transferable.

Office swivel chairs usually have a swivel mechanism and an armrest. There are a variety of configurations of swivel mechanisms, armrests and their connection.

An armrest carrier is typically attached to a seat carrier. Such a chair and such an armrest carrier are for example in the DE 10 2008 042 974 B3 described.

In addition, there are also versions of an office swivel chair with swivel mechanism in which an armrest support is hinged to a backrest support. Such an office swivel chair is for example in the US 2002/0149247 A1 described.

The disadvantage of such articulation is designed with a variety of items, which makes installation difficult. In addition, the linkage is largely visible from the outside, which is disadvantageous in design aspects.

In addition, the base and handlebars of a swivel mechanism of this office swivel chair are designed to be relatively solid and have a return spring integrated in the swivel mechanism. Overall, therefore, a relatively large space is needed. Furthermore, the entire structure of such office swivel chair is very massive, which increases the weight and is particularly disadvantageous in design aspects.

SUMMARY OF THE INVENTION

Against this background, the present invention seeks to provide an improved connection arrangement for a chair.

According to the invention, this object is achieved by a connection arrangement having the features of patent claim 1 and / or by a method having the features of patent claim 12 and / or a chair having the features of patent claim 14.

• – Eine Verbindungsanordnung für einen oder in einem Stuhl, insbesondere Konferenz- oder Bürostuhl, mit: einem Armlehnenträger; einem Rückenlehnenträger; und einem in dem Armlehnenträger fixierten Lagerbolzen, welcher den Armlehnenträger drehbar mit dem Rückenlehnenträger koppelt.
• – Ein Verfahren zur Herstellung einer Verbindungsanordnung für einen oder in einem Stuhl, insbesondere einer erfindungsgemäßen Verbindungsanordnung, mit den Schritten: Bereitstellen eines Rückenlehnenträgers, eines Armlehnenträgers, und eines Lagerbolzens; Fixieren des Lagerbolzens in dem Armlehnenträger; und drehbares Koppeln eines Lagerabschnitts des Lagerbolzens mit dem Rückenlehnenträger.
• – Ein Stuhl, insbesondere Konferenz- oder Bürostuhl, mit einem Sitzträger, mit einer erfindungsgemäßen Verbindungsanordnung und/oder mit einem erfindungsgemäßen Verfahren hergestellten Verbindungsanordnung, wobei der Armlehnenträger an einem dem Rückenlehnenträger abgewandten Ende an dem Sitzträger befestigt ist und die Verbindungsanordnung zur Übertragung einer Rücklehnkraft zwischen dem Rückenlehnenträger und dem Sitzträger vorgesehen ist.

Accordingly, it is provided:

• A connection arrangement for or in a chair, in particular a conference or office chair, comprising: a armrest support; a backrest support; and a bearing pin fixed in the armrest support and rotatably coupling the armrest support to the backrest support.
• - A method for producing a connection arrangement for or in a chair, in particular a connection arrangement according to the invention, comprising the steps of: providing a backrest support, a armrest support, and a bearing pin; Fixing the bearing pin in the armrest carrier; and rotatably coupling a bearing portion of the bearing bolt with the seat back support.
• - A chair, in particular conference or office chair, with a seat support, with a connection arrangement according to the invention and / or produced by a method according to the invention connection arrangement, wherein the armrest carrier is secured to a remote from the backrest support end to the seat support and the connection arrangement for transmitting a recline force between the backrest support and the seat support is provided.

The idea underlying the present invention is to rotatably couple an armrest carrier to a backrest support by means of a bearing pin fixed in the armrest carrier.

Advantageously in this way a rotatable articulation and thus the possibility of integration into a predetermined movement of a chair, for example, a synchronous movement created.

The rotatable linkage comes with a minimum of individual parts. Thus, the connection assembly according to the invention is very easy and inexpensive to assemble.

In addition, feedback can be transmitted via the connection arrangement advantageous. This opens up the possibility of using the armrest carrier as a force storage element of a pivoting mechanism of the chair.

Particularly advantageously, the bearing pin can also be fixed in such a way in the armrest carrier, in particular on a side facing the backrest support, that it is invisible from the outside. For example, it can be admitted to the production on the backrest support side facing or partially sunk in a blind hole.

In addition, the connection arrangement according to the invention has a particularly small installation space. In particular, according to the invention, the bearing bolt can be fixed in a narrow cross-section of the armrest carrier. For example, a height of the cross section may be less than five times a core diameter of the bearing pin. In this way, a particularly slim design of a armrest carrier is possible.

The fixation of the bearing pin preferably comprises a determination of all degrees of freedom relative to the armrest carrier. In particular, the bearing pin is rotationally fixed in the armrest carrier. For example, it can be molded, screwed in with a pre-tensioning and / or firmly bonded. In this way, a reliable power transmission of the reclining forces on the armrest carrier with high strength of the connection is advantageously possible.

In a chair provided with the connection arrangement, a backrest frame attached to the backrest support is preferably provided, which has a recess and is pushed onto the backrest support in the region of the recess. In this way, the region of the rotatably mounted in the backrest support bearing pin, in particular completely, are covered by the backrest frame, so that the connection is particularly advantageous from the outside invisible design aspects.

Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.

According to a preferred embodiment, the armrest carrier has a bore into which the bearing pin is screwed. Particularly preferably, this is a blind hole, which is advantageously not visible from the outside under design aspects. Thus, an aesthetic and easy-to-manufacture fixation is created.

According to a further development, the bearing pin has a self-holding thread designed and a paragraph, wherein the thread in the bore and the shoulder is biased non-positively on a shoulder or shoulder of the bore. Advantageously, unwanted loosening of the fixation is avoided in this way. In particular, no further securing means are necessary for this purpose. Furthermore, a high strength of the connection or fixation is provided in this way. The self-retaining thread holds in particular without an internal thread of the bore in the material of the armrest carrier without cutting it.

According to a particularly preferred embodiment, the material of the armrest support in the region of the thread is completely unseparated. In particular, the material is not cut. In one embodiment, the bore is unthreaded in the initial state. A bore diameter is significantly larger than the core diameter of the thread, in particular by at least 5%, preferably by 8% to 10%. In this way, a release-free molding of the thread is made possible in the bore, wherein the material of the armrest carrier, which is preferably a plastic-containing material, not separated or cut but only deformed. The larger diameter of the bore creates space for evading the material of the armrest carrier. Thus, the material is merely displaced. Particularly advantageous in this way no crack approaches in the material of the armrest support available. Rather, material connections remain crack-free.

According to one embodiment, the thread has a pitch per thread, which is at least half of its core diameter. Gradients of, for example, between 2.5 mm and 4.5 mm, in particular between 3 mm and 4 mm, with a core diameter of, for example, 5 mm to 8 mm, in particular 6 mm to 7 mm, are preferred. With this very high thread pitch a traction is achieved despite low deformation of the material of the armrest carrier when screwing or forming the thread.

According to one embodiment, the thread in the profile has a rounded tip with a width smaller than 5% of the core diameter, in particular smaller than 3% of the core diameter. For example, with a core diameter of 6.4 mm, the width of the tip is less than 0.2 mm. Due to the small width of the tip combined with its rounding a cutting into the material of the armrest carrier is avoided.

According to a preferred embodiment, the armrest carrier comprises a plastic material, in particular polyamide, preferably with glass fiber content. Particularly preferred glass fiber reinforced polyamide 6 is used with 30% glass fiber content (PA 6 GF30). In particular, the material of the armrest carrier and a thread form of the thread of the bearing pin are in this case coordinated so that the material is deformed undivided in the region of the thread. Nevertheless, such a material has a high strength. Furthermore, it has an E-module, which qualifies him as a construction material for a very slim formable power storage element. For example, the modulus of polyamide with glass fiber content in the range of 6000 to 10,000 MPa.

Advantageously, the plastic material for molding the armrest support provides a great deal of freedom in shaping. In addition, a production of large quantities is easy to represent, for example by injection molding. Further preferably, the plastic material is colored through. Overall, therefore, after a prototype hardly or only minor reworking necessary.

Preferably, the armrest support is provided with such a plastic material with a narrow cross-section, the height of which is in particular less than five times a core diameter of the bearing pin. Thus, a particularly slim design is possible.

According to one embodiment, the backrest support comprises a rigid material. In particular, this may be a metal, preferably aluminum die-cast. In this way, the rotatable mounting of the bearing pin in the backrest support is made possible with little space.

According to one embodiment, the backrest support has a receiving portion with a first bearing bush for rotatably receiving a bearing portion of the bearing pin. In this way, a defined rotatable mounting of the bearing pin is provided.

According to an advantageous development, the first bearing bushing receives a first step of the bearing section. Furthermore, a second bearing bush is provided, which receives a second stage of the bearing section. In this way, the rotatable bearing with a very high strength and suitable for transmitting large forces. The provision of the bushings also advantageously reduces noise during movement of the connection assembly. In particular, the power support on the first and two bushing is also suitable for supporting larger moments. The strength can be further increased by reinforcing ribs in the material of the backrest support, in particular aluminum die-cast, for load absorption. In this way, advantageously, the armrest carrier can be designed as a force storage and / or power transmission element and / or are under a bias.

According to a development, the first bushing has a smaller diameter than the second bushing. For example, a diameter of the second bushing is a quarter to a half, in particular by a third, larger. In this way, the bearing pin is much easier to insert into the receiving portion, which facilitates assembly.

According to one embodiment, the bearing portion is fixed by means of a provided in the first stage first securing means, in particular a mountable securing means, and adjacent to the second stage second securing means, in particular a paragraph, rotatably about the pin axis in the bearing bushes. In this way, the rotatable mounting is advantageously secured.

According to one embodiment, the bearing pin has a torque transmission section which is arranged between the thread and the bearing section and which is provided with a tool attachment designed to transmit a torque which is screwed non-positively into the bore. In this way, easy assembly is advantageously ensured.

According to one embodiment of the method for producing a connection arrangement, a thread of the bearing pin is screwed into a provided in the material of the armrest support thread-free bore for fixing, the screwing by separation-free molding at a slow speed, in particular less than one revolution per second is made. For this purpose, the bore preferably has a diameter which is significantly larger, in particular at least 5% larger, preferably 8 to 10% larger, than the core diameter of the thread. The material of the armrest support, preferably a plastic material, so can dodge in the slow screwing, so that it can be deformed without separation.

According to one embodiment of the chair, the seat carrier is coupled to the backrest support via a translation, which allows a pivoting of the backrest support and the seat support with a predetermined movement. The armrest carrier is designed as a force storage element and provides a restoring force for the predetermined movement. The armrest support is tensioned upon application of a reclining force and resulting rearward pivoting of the seatback support and the seat support, and returns the seatback support and seat support to an upright position when the recline is removed.

In one embodiment, the armrest carrier is designed as a tensile and / or bending energy storage element.

The above embodiments and developments can, if appropriate, combine with each other as desired. In particular, the features of a connection arrangement are transferable to a method for producing such a connection arrangement, and vice versa.

Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

CONTENT OF THE DRAWING

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawing. It shows:

1 a horizontal longitudinal sectional view of a chair with a connection arrangement;

2 an enlarged section of the longitudinal sectional view according to 1 in the field of connection arrangement;

3 a cross-sectional view of a thread of a bearing pin;

4 a front view of a bearing pin;

5A a schematic sketch of the kinematics of a chair in an upright position;

5B the sketch of the kinematics of a chair according to 5A in a pivoted backward position;

6 a schematic sketch of the kinematics of a chair according to another embodiment;

7A a side view of a chair in an upright position;

7B a side view of the chair according to 7A in a pivoted backward position;

8th a longitudinal sectional view of a chair.

The accompanying figures of the drawing are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.

In the figures of the drawing are the same, functionally identical and same-acting elements, features and components - unless otherwise stated - each provided with the same reference numerals.

DESCRIPTION OF EMBODIMENTS

1 shows a horizontal longitudinal sectional view of a chair 1 with a connection arrangement 30 , The perspective shown shows the chair 1 from above.

The connection arrangement 30 has a armrest carrier 4 , a backrest support 3 and a bearing pin 31 on.

The bearing bolt 31 is in the armrest carrier 4 fixed and rotatable with the backrest support 3 coupled.

Other features of the chair are related to the 5 to 8th described in more detail.

2 shows an enlarged section of the longitudinal sectional view according to 1 in the area of the connection arrangement 30 ,

Recognizable, the bearing pin 31 a thread 33 and a bearing section 43 on. By means of the thread 33 is the bearing pin 31 in the armrest carrier 4 fixed. This is a hole 32 in the form of a blind hole in the armrest carrier 4 provided, in which the bearing pin 31 is screwed.

The thread 33 is designed self-holding, wherein the bearing pin 31 also one to the thread 33 adjacent paragraph 34 having. By self-holding thread 33 and the paragraph 34 becomes the bearing pin 31 in the hole 32 frictionally biased, with the paragraph 34 of the bearing pin on a heel 35 the bore 32 supported.

The material of the armrest carrier 4 is in the area of the thread 33 completely unseparated. This is due to a special Thread form and on the other achieved by that the bore 32 is thread-free in the initial state and a bore diameter is significantly larger than the core diameter of the thread.

For example, in one embodiment, the bore diameter is 7 mm, while a core diameter of the thread is 6.4 mm.

In the manufacture of the connection arrangement 30 becomes the thread 33 screwed in at low speed by a release-free molding, with a screwing speed less than one revolution per second. The material of the armrest carrier, here exemplified polyamide 6 with 30% glass fiber content (PA 6 GF30) is not separated or cut but only deformed or displaced. The larger diameter of the bore creates enough space to dodge the material.

The storage section 43 is in a recording section 40 of the backrest wearer 3 rotatably mounted. He is in a first socket 41 and in a second socket 42 received, which in a recess of the aluminum die-cast backrest carrier 3 are arranged.

The sockets 41 . 42 are designed as plain bearings and have different diameters, wherein a diameter of the second sleeve 42 larger than a diameter of the first socket 41 is provided.

By way of example, a diameter of the first bushing may be 6 mm and a diameter of the second bushing 8 mm.

The bearing bolt 31 is in the jacks 41 . 42 secured by adjacent to the first socket 41 a first securing means 46 in the form of a groove in a bearing pin 31 mounted locking ring and adjacent to the second socket 42 a second securing means 47 in the form of a on the bearing pin 31 intended paragraph.

One on the backrest carrier 3 mounted backrest frame 16 has a recess 53 on and is in the area of the recess 53 on the recording section 40 of the backrest wearer 3 postponed. In addition, there is between the backrest frame 16 and the armrest carrier 4 only a small gap 54 so that the receiving section 40 and the bearing pin 31 almost completely, through the backrest frame 16 and the armrest carrier 4 are invisibly hidden from the outside.

3 shows a cross-sectional view of a thread 33 a bearing bolt 31 ,

The thread 33 has a core diameter 37 and a slope 36 on. The slope 36 is greater than half the core diameter in terms of amount 37 , For example, a core diameter 37 6.4 mm, while a slope is 3.5 mm.

The profile of the thread 33 has a rounded tip 38 on. A width 39 the top 38 amount is less than 3% of the core diameter 37 , by way of example 0.17 mm.

A flank height 51 the profile is comparatively large and in particular more than a five times, preferably more than a seven times, the width 39 the top 38 or more than one-fifth of the core diameter 37 , for example, 1.2 mm.

An entire diameter 52 of the thread 33 is thus more than a third larger than the core diameter 37 and is exemplified by 8.8 mm.

4 shows a front view of a bearing pin.

The bearing bolt 31 points in the area of the bearing section 43 a first step 44 and a second stage 45 which, according to the different diameters of the sockets 41 . 42 also different. Accordingly, the first stage 44 for example, a diameter of 6 mm and the second stage 45 exemplarily a diameter of 8 mm.

Between the thread 33 and the storage section 43 , more precisely between the paragraph 34 and the paragraph 47 is a moment transmitting section 49 intended. This has a tool approach 50 on, by means of which a tool torque on the bearing pin 31 is transferable, so he can easily with the thread 33 can be screwed.

5A shows a schematic sketch of the kinematics of a chair 1 in an upright position. The kinematics will be explained below with reference to this sketch.

The chair 1 has a seat carrier shown schematically 2 and a backrest support shown schematically 3 on which about a translation 5 are coupled.

The translation 5 determines a movement of the seat support 2 and of Backrest support 3 when pivoting from the here shown. upright position in a pivoted backward position.

In addition, the seat carrier 2 and the backrest support 3 via a trained as a force storage element armrest carrier 4 coupled. The armrest carrier 4 is designed and arranged such that it determines the predetermined by the translation movement of the seat support 2 and the backrest wearer 3 allows. In addition, the armrest carrier presents 4 a force returning to the upright position.

The force returning to the upright position is provided throughout the movement. In particular, the armrest carrier is stretched with increasing pivoting to the rear.

Furthermore, a bias of the armrest carrier 4 be provided so that even in the upright position restoring force is applied. In particular, a stop, not shown here, is provided in this case, on which the bias is supported in the upright position.

For pivoting the seat support and the backrest support from the upright position in the pivoted backward position, therefore, an external against the bias or against the restoring force working recline force must be applied.

5B shows the sketch of the kinematics of a chair 1 according to 5A in a pivoted backward position.

In the pivoted to the rear position of the trained as a force storage element armrest carrier 4 elastically deformed or tensioned and thus stores an applied in the rear pivoting and clamping work or energy. This causes in a state free of external forces, in particular without recline, a force returning to the upright position.

The translation 5 is with a seat base 8th coupled. A first turning point 9 and a second pivot 10 the translation 5 are fixed to the seat base. In addition, one on the seat support 2 firmly arranged third pivot point 11 and another on the seat carrier 2 fixed fourth pivot point 12 intended.

The first fulcrum 9 is with the fourth pivot 12 via a first handlebar 13 coupled, which firmly with the backrest support 3 connected or integrally formed therewith. The first handlebar 13 thus provides kinematically a part or an extension of the backrest support 3 represents.

A second handlebar 14 couples the second pivot 10 with the third pivot 11 , The first handlebar 13 , the seat base 8th , the second handlebar 14 and the seat carrier 2 thus close together a kinematic quadrilateral with the first to fourth pivot points 9 to 12 as corners.

The first handlebar 13 and the second handlebar 14 are both in the upright position according to 5A as well as in the rearward pivoted position according to 5B inclined in a same direction, which is one of the backrest support 3 represents opposite direction. The second handlebar 14 is always slightly more inclined than the first handlebar 13 , For both handlebars, a vertical inclination in the upright position is greater than in the rearward pivoted position. Thus, the third and fourth pivot point cancel each other out 11 . 12 and thus the seat carrier 2 at the rear pivoting.

The fourth pivot 12 is in a rear area 18 of the seat wearer 2 and the third pivot 11 in a front area 17 of the seat wearer 2 arranged. Further, the second link is 14 in addition to its stronger inclination also longer than the first handlebar 13 educated. Therefore, the front area rises 17 of the seat wearer 2 at the rearward pivoting stronger than the rear area 18 so that the seat carrier 2 is pivoted.

The trained as a force storage element armrest carrier 4 is at a first end 6 rotatably with the seat support 2 coupled.

At a second end 7 is the armrest carrier 7 rotatable with the backrest support 3 coupled. Accordingly, a fifth pivot point 19 provided over which the armrest carrier 4 with the backrest support 3 is rotatably coupled.

This fifth pivot 19 is with a connection arrangement 30 realizable. The connection arrangement 30 thus fulfills the task of a fulcrum in the kinematics of the swivel and chair 1 ,

The fifth pivot 19 or the connection arrangement 30 advantageously allows a mixture of tensile or compressive and bending stress of the armrest carrier 4 in a backward pivoting. The pivoting changes a distance of the fifth pivot point 19 from that turned with the seat carrier 2 coupled first end 6 so that a tensile or compressive force is applied. In addition, when pivoting, the fifth pivot point 19 shifted relative to the first end such that a force component across added to the pure tensile or compressive load and the armrest carrier is thus charged with a bending force, which on the rotating firmly with the seat support 2 coupled first end 6 causes a bending moment.

These loads are by means of the connection arrangement 30 transferred between the armrest carrier and the backrest support.

6 shows a schematic sketch of the kinematics of a chair according to another embodiment.

A seat base 8th is here only at the first and second fulcrum 9 . 10 symbolized fixed bearings.

The predetermined movement of the translation 5 depends in particular on the arrangement of the pivot points 9 . 10 . 11 . 12 from. In the illustrated embodiment, a distance between the second pivot point 10 and the third pivot 11 passing through the second link 14 is formed, about the same size as a distance between the fourth pivot point 12 and the third pivot 11 passing through the seat carrier 2 is formed. A distance between the first pivot 9 and the fourth pivot 12 passing through the first handlebar 13 is formed, is significantly smaller and is in particular only a fraction of it. A distance between the first pivot 9 and the second pivot 10 passing through the seat base 8th is formed, lies between these distances.

An angle between a cross member of the backrest support 3 and the first handlebar 13 is fixed and is preferably between 90 and 180 °, here for example between 125 ° and 130 °. In this way, that of the backrest wearer 3 opposite slope of the first link 13 reached.

7A shows a side view of a chair in an upright position.

The chair 1 is here exemplified in the form of a conference swivel chair, which kinematics according to 6 having.

The chair 1 has a seat 20 on which with one on the seat carrier 2 attached seat cushion 21 is formed. There is also a backrest 22 provided, which with a on the backrest support 3 attached backrest frame 16 and a backrest pad attached thereto 23 is formed.

The backrest frame 16 is with its recess 53 on the receiving section 40 of the backrest wearer 3 deferred and thus covers the receiving section, as in 2 shown.

The seat base 8th is with a height-adjustable compression spring section 25 coupled, which on a roll-free stand 24 , which is designed as a swivel foot, is mounted.

There is also an armrest 26 provided, which with the armrest carrier 4 and an attached armrest pad 27 is formed.

The armrest carrier 4 is made entirely of glass fiber reinforced polyamide and formed with a curved shape enclosing an angle of about 290 °.

With his first end 6 is the armrest carrier 4 at the bottom of the seat support 2 screwed non-rotatably. The second end 7 of the armrest carrier 4 is as part of a connection arrangement 30 rotatable on the backrest support 3 stored, as regards 1 to 4 described.

The individual elements of the translation 5 are also partly hidden here, especially the second and third fulcrum 10 . 11 , Easily recognizable from the outside are the first handlebar 13 which is partially integral with the backrest support 3 is formed, and the second link 14 ,

7B shows a side view of the chair according to 7A in a pivoted backward position.

The backrest 22 is here visibly pivoted backwards. By way of example, this is a pivoting angle in relation to the upright position of 21 °. To the same extent is the first handlebar 13 together with the backrest support 3 pivoted.

Due to the inclination of the first link 13 and the seat wearer 2 is also the second handlebar 14 pivoted, but to a much lesser extent than the first handlebar 13 ,

Both handlebars 13 and 14 are both in the upright position according to 7A as well as in the rearward pivot position according to 7B tilted forward so that a weight of a person sitting on the chair causes a restoring moment and designed as a force storage element armrest carrier 4 thus only has to work against the recline.

The seat 20 is a bit raised and additionally also pivoted, but compared to the backrest 22 in clear lesser degree. By way of example, this is a pivoting angle of 7 °.

The armrest carrier 4 is loaded in the illustrated tensioned state both pressure and bending and thus elastically compressed and bent. The corresponding forces are transmitted via the connection arrangement 30 between the armrests 4 and backrest support 3 transfer.

The tilted backward position is achieved by getting one on the chair 1 seated person leans backwards and thus a backrest force on the backrest 22 applies what a spring force of the armrest carrier 4 overcomes.

The backrest 22 can be compared to in 3B shown pivoted backward position by elastic deformation of the backrest support 3 and the backrest frame 16 be pivoted further back, for example, about another 7 °. A total possible swivel angle is thus about 28 °.

This is the armrest carrier 4 additionally tensioned, so that additional forces on the connection arrangement 30 be transmitted.

Despite the large swivel range, all visible components of the chair are 1 , in particular the backrest support 3 , the first handlebar 13 , the seat base 8th and the second handlebar 14 as well as the seat carrier 2 , very slim. The same applies in particular to the armrest carrier 4 which has a narrow cross-section. A height of the cross section is in particular smaller than a five times a core diameter of the bearing pin 31 ,

In addition, there are no other components between the seat support 2 and the seat base 8th or between the seat carrier 2 and the backrest support 3 arranged. In this way, an extremely slim design of the chair is created overall 1 without losing functionality compared to a conventional synchronous mechanism.

8th shows a longitudinal sectional view of a chair 1 ,

This is in contrast to the embodiment according to 7A and B to an office swivel chair, which is particularly due to the different training of the stand 24 with roles 28 as well as its much higher connection to the compression spring section 25 is to make out. Incidentally, the office swivel chair is according to 8th essentially the same as the conference swivel chair 7A and 7B educated.

The office swivel chair is shown here in the upright position. Pivoting in the rearwardly pivoted position is the same as with respect to 7B described possible.

In the sectional view easily recognizable are the seat cushion 21 and the backrest cushion 23 , In addition, it is easy to recognize with a fastener 29 in the form of a screw realized attachment of the backrest frame 16 on the backrest support 3 ,

Further, in the section is a pivoting portion of the seat support 2 and backrest support 3 in the upright position limiting stop 15 recognizable. This is in the area of the third pivot point 11 provided in the form of a stop wedge, which in the upright position on the second link 14 and in the rearward pivoted position on the seat support 2 supported. Preferably, another stop 15 similarly at the fourth pivot point 12 provided, which is hidden here.

The stop 15 is arranged and designed so that when reaching the stop 15 as before, the backrest support 3 and the seat carrier 2 in the upright position holding bias of the armrest support 4 is applied. In this way, even in the upright position, a defined position of the translation 5 , the seat wearer 2 and the backrest wearer 3 guaranteed.

Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways.

For example, the armrest carrier needs 4 not be formed in the manner shown. It would also be conceivable, for example, to design the armrest carrier kinematically as a pure tension spring and / or to attach an armrest body projecting therefrom, for example, from it. In this case could possibly. Both ends of the armrest carrier 4 rotatable with the backrest support 3 or the seat carrier 2 be coupled.

It would also be conceivable, the chair not as a swivel chair but as a three- or four-legged chair form. In this case, the seat base 8th provided with appropriate chair legs.

LIST OF REFERENCE NUMBERS

1

chair

2

seat support

3

Backrest support

4

armrest support

5

translation

6

first end

7

second end

8th

seat base

9

first fulcrum

10

second pivot

11

third pivot

12

fourth pivot

13

first handlebar

14

second handlebar

15

attack

16

Backrest frame

17

front end

18

rear end

19

fifth pivot

20

seat

21

seat cushion

22

backrest

23

Backrest cushion

24

stand

25

Compression spring portion

26

armrest

27

armrest pad

28

role

29

fastener

30

joint assembly

31

bearing bolt

32

drilling

33

thread

34

paragraph

35

paragraph

36

pitch

37

core diameter

38

top

39

width

40

receiving portion

41

first bearing bush

42

second bearing bush

43

bearing section

44

first stage

45

second step

46

first securing means

47

second securing means

48

pin axis

49

Torque transmission portion

50

tool attachment

51

flank height

52

diameter

53

recess

54

gap

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008042974 B3 [0005]
• US 2002/0149247 A1 [0006]

Claims (15)

Connection arrangement ( 30 ) for one or in a chair ( 1 ), in particular a conference or office chair, comprising: a armrest support ( 4 ); a backrest support ( 3 ); and one in the armrest carrier ( 4 ) fixed bearing pin ( 31 ), which the armrest carrier ( 4 ) rotatable with the backrest support ( 3 ) couples. Connecting arrangement according to claim 1, characterized in that the armrest carrier ( 4 ) a hole ( 32 ), in particular blind bore, in which of the bearing bolts ( 31 ) is screwed. Connecting arrangement according to claim 2, characterized in that the bearing pin ( 31 ) a self-holding threaded ( 33 ) and a paragraph ( 34 ), wherein the thread ( 33 ) in the hole ( 32 ) and paragraph ( 34 ) on an approach or paragraph ( 35 ) of the bore ( 32 ) is biased non-positively. Connecting arrangement according to claim 3, characterized in that the material of the armrest carrier ( 4 ) in the area of the thread ( 33 ) is completely unseparated. Connecting arrangement according to claim 3 or 4, characterized in that the thread ( 33 ) one pitch per turn ( 36 ) having at least half of its core diameter ( 37 ) is. Connecting arrangement according to one of claims 3 to 5, characterized in that the thread ( 33 ) in the profile a rounded tip ( 38 ) with a width ( 39 ) smaller than 5% of the core diameter ( 37 ), in particular less than 3% of the core diameter ( 37 ), having. Connecting arrangement according to one of the preceding claims, characterized in that the armrest carrier ( 4 ) comprises a plastic material, in particular polyamide, preferably with glass fiber content. Connecting arrangement according to one of the preceding claims, characterized in that the backrest support ( 3 ) a receiving section ( 40 ) with a first bearing bush ( 41 ) for rotatably receiving a bearing section ( 43 ) of the bearing pin ( 31 ) having. Connecting arrangement according to claim 8, characterized in that the first bearing bush ( 41 ) a first stage ( 44 ) of the storage section ( 43 ) and a second bushing ( 42 ), a second stage ( 45 ) of the storage section ( 43 ). Connecting arrangement according to claim 9, characterized in that the bearing section ( 43 ) by means provided in the region of the first stage first securing means ( 46 ), in particular a mountable securing means, and one to the second stage ( 45 ) adjacent second securing means ( 47 ), in particular a paragraph, about the pin axis ( 48 ) rotatable in the bearing bushes ( 41 . 42 ). Connecting arrangement according to one of claims 8 to 10, characterized in that the bearing pin ( 31 ) one between the threads ( 33 ) and the storage section ( 43 ) arranged torque transmission section ( 49 ), which with a for transmitting a the thread ( 33 ) frictionally into the bore ( 32 ) screwing in moments trained tool approach ( 50 ) is provided. Method for producing a connection arrangement ( 30 ) for one or in a chair ( 1 ), in particular a connection arrangement according to one of the preceding claims, comprising the steps of: providing a backrest support ( 3 ), a armrests carrier ( 4 ), and a bearing bolt ( 31 ); Fixing the bearing pin ( 31 ) in the armrest carrier ( 4 ); and rotatable coupling of a bearing section ( 43 ) of the bearing pin ( 31 ) with the backrest support ( 3 ). A method according to claim 12, characterized in that for fixing a thread ( 33 ) of the bearing pin ( 31 ) in one in the material of the armrests carrier ( 4 ) provided unthreaded bore ( 32 ) is screwed, wherein the screwing is made by separation-free molding at a slow speed, in particular less than one revolution per second. Chair ( 1 ), in particular conference or office chair, with a seat support ( 2 ), with a connection arrangement ( 30 ) according to one of claims 1 to 13 and / or produced by a method according to claim 14, wherein the armrest carrier ( 4 ) on a backrest support ( 3 ) facing away from the end ( 6 ) on the seat support ( 2 ) and the connection arrangement ( 30 ) for transmitting a reclining force between the backrest support ( 3 ) and the seat carrier ( 2 ) is provided. Chair according to claim 14, characterized in that the seat support ( 2 ) with the backrest support ( 3 ) about a translation ( 5 ), which pivoting the backrest support ( 3 ) and the seat carrier ( 2 ) is allowed with a predetermined movement, wherein the Armrest carrier ( 4 ) is designed as a force storage element and provides a restoring force for the predetermined movement.

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