DE102013005861A1 - Mechanism assembly for a chair and chair with such a mechanical assembly - Google Patents

Abstract

The invention relates to a mechanical assembly 2 for a chair 1, a foot element 3, a back element 4 and a seat element 5 being articulated to the mechanical assembly 2, and the mechanical assembly 2 comprising a lower housing part 6 which can be connected to the foot element 5.

Description

The invention relates to a mechanical assembly for a chair and a chair with such a mechanical assembly.

From the DE 33 35 463 A1 a mechanism assembly for a chair is known to which a foot member, a back member and a seat member is articulated and wherein the mechanical assembly comprises a connectable to the foot member housing base.

It is an object of the invention to propose a mechanical assembly for a chair or a chair with such a mechanical assembly, whereby a simple and time-saving assembly of the mechanical assembly is made possible by the formation of the mechanical assembly.

This object is achieved on the basis of the features of the preamble of claim 1 and 13 by the characterizing features of claim 1 and 13, respectively. In the dependent claims advantageous and expedient developments are given.

The mechanical assembly according to the invention comprises a connectable to the seat member swing arm and connectable to the back element back connection, wherein the swing arm and the back connection are pivotally hinged to the housing lower part, wherein the swing arm can be coupled via the seat member with the return connection, wherein the mechanical assembly further in the Housing bottom insertable cartridge and at least one leaf spring, wherein the mechanical assembly as connected to the cassette mounting parts further comprises at least one adjustable support and an adjustment mechanism for that supports, wherein the cassette comprises at least one lane, wherein the support on at least one of the formed on the cassette Roadways is guided and wherein the support moving adjustment mechanism is mounted on the cassette and wherein the leaf spring is fixed with a first end portion in a receptacle in the housing lower part, with a Em central region rests on the support and the back connection is supported with a second end region such that the leaf spring is bent over the support. By using a cartridge carrying the mounting parts, a stepwise mounting of the mechanical assembly is facilitated because the cassette can be inserted into the housing base together with the mounting parts. Core of the invention is the use of a designated as a cassette support member which detached from the lower housing and detached from the swing arm and the back connection allows the pre-assembly of a plurality of components of the mechanical assembly and thus simplifies the lower housing part structurally as attached to this only a few attachments are.

It further provided to connect the cartridge by at least one connecting means with the housing lower part. As a result, a reliable cohesion between the lower housing part and the mounted on the cassette mounting parts is guaranteed. Preferably, the cassette is designed as a plastic body. A plastic body allows the screwing of built-in parts anywhere. As a connecting means for fixing the cassette to the lower housing part, in particular a pin or a screw is provided, wherein it is also provided that the pin additionally serves as a stop or Wegbegrenzer for the back connection.

Furthermore, it is provided to form the lower housing part as a trough, wherein said trough comprises at least three side walls and wherein the cassette is arranged in a recess formed by the trough. Such an adaptation of the lower housing part to the trough ensures reliable storage of the cassette in the trough so that the or the connecting means which connect the cassette and the lower housing part must absorb less load.

It is also provided to equip the mechanical assembly with an upper housing part, wherein the upper housing part with the lower housing part forms a receiving space in which the cassette, the at least one leaf spring and the built-in parts are accommodated. As a result, located in the receiving space built-in parts are arranged protected.

Furthermore, it is intended to form the roadway on a surface of the cassette. This can be dispensed with an additional, the roadway forming component. In one embodiment of the cassette as a plastic component, the roadway formed on the cassette has a low frictional resistance for the support which is guided on the roadway.

In the formation of multiple lanes, it is either intended to adapt the support on one of the lanes or on several identical lanes. In an adaptation of the support on only one of the lanes, it is possible to arrange on one and the same cassette different lanes and depending on the chair type to be used a support, which is adapted to the appropriate lane. Alternatively, it is also possible to use a support which is designed such that this by lateral Move or can be placed by turning on different lanes. The assignment of a support to several identical lanes leads to a particularly reliable guidance of the support in the displacement directions.

According to the invention, different lanes are to be understood as lanes which have different gradients on comparable lane sections. In other words, different lanes, lanes, which show different height profiles in the side view.

According to one embodiment, it is provided to form the individual roadway as running in the direction of movement of the support groove. Here, a bottom of the groove forms the height profile, which controls the support. Alternatively, it is also provided that the height profile is formed by an edge region surrounding the groove.

The support is designed such that it comprises at least one contact means which is in contact with the roadway in the different positions which the support can assume. Here, the contact means is designed in particular as a sliding shoe, which is adapted to a groove forming the roadway. Such a form-fitting interaction between the support and the roadway results in a particularly reliable straight-line design of the support.

As already mentioned above, different guide characteristics of the mechanical assembly can be generated by guiding the support on differently shaped roadways, so that the mechanical assembly can be adapted to different requirements in accordance with the height profile of the road used. Such an adaptation is especially provided when the mechanical assembly is used for different types of chair or should be adapted to a group of people with particularly light or particularly heavy people.

To realize different lanes on the mechanical assembly, it is also intended to form the individual lane as a roadway insert, wherein the cassette for receiving such a roadway insert has a mounting portion. Here, the mounting portion is formed in particular as a shaft in which the roadway insert can be used. Such a design has the advantage that the cassette can be equipped in unmodified form with a variety of roadway applications.

The invention also relates to a system for adapting the spring characteristic of a mechanical assembly, which is characterized in that the mechanical assembly comprises at least one support and several lanes with different height profiles for the support, wherein the support can be combined by converting or turning with different lanes or which thereby is characterized in that a roadway with a first height profile against a roadway with a second height profile different from the first height profile is interchangeable.

Further details of the invention will be described in the drawing with reference to schematically illustrated embodiments.

Hereby shows:

1 a side view of a mechanical assembly according to the invention, which is completed by a foot member, by a seat member and a backrest to a complete chair;

2 : A plan view of the lower housing part in the 1 shown mechanical assembly;

3 : a top view of that in the 2 shown housing lower part with inserted cartridge;

4 and 5 : schematic representations of various positions of a run on cassettes with different lanes support;

6 : a side view on the in the 1 shown mechanical assembly, wherein also a housing upper part of the mechanical assembly is shown;

7 a plan view of an alternative embodiment of a mechanical assembly;

8th a sectional side view of a roadway insert for in the 7 shown cassette;

9 : another top view of the in the 7 shown mechanical assembly with inserted roadway inserts and turned support.

In the 1 is a schematic side view of a chair 1 shown, which is a mechanical assembly 2 includes. In addition to the mechanical assembly 2 includes. The chair 1 includes a foot element 3 , a back element 4 and a seat element 5 , The mechanical assembly 2 comprises a housing lower part 6 , a swing arm 7 and a back connection 8th , Here is the foot element 3 with the housing lower part 6 connected and wearing this. Furthermore, the back element 4 over the back connection 8th on the lower housing part 6 hinged and continues to be the seat element 5 over the swing arm 7 on the lower housing part 6 hinged. The swing arm 7 is pivotable about a swivel axis S7 and the back connection 8th is pivotable about a pivot axis S8 with the housing lower part 6 connected. The seat element 5 is pivotable about a pivot axis S57 with the swing arm 7 connected. Furthermore, the seat element 5 swiveling around a swivel axis S58 with the back connection 8th connected. The mechanical assembly 2 further includes a in the housing base 6 usable cassette 9 and two leaf springs 10 . 11 , where the leaf spring 11 in the in the 1 shown completely by the leaf spring 10 is covered. As built-in parts 12 , which with the cassette 9 include the mechanical assembly 2 two more supports 13 . 14 and one on both supports 13 . 14 acting adjustment mechanism 15 , Here is the second support 14 in the in the 1 shown side view completely through the first support 13 covered. The cassette 9 includes as built-in parts 12 continue four lanes 16 to 19 , for the two supports 13 . 14 , Regarding the lanes 16 to 19 will also be on the 3 referenced, in which the mechanical assembly 2 is shown in plan view. The two leaf springs 10 . 11 are with first endbreichen 10a . 11a in recordings 20 . 21 held, which on the housing lower part 6 are formed. In a middle area 10b . 11b lie the two leaf springs 10 . 11 on the respective assigned supports 13 respectively 14 on. With a second end area 10c . 11c support the two leaf springs 10 . 11 the back connection 8th from. The back connection 8th lies with attacks 22 . 23 on tops 10d . 11d the leaf springs 10 . 11 on and thus relies on the leaf springs 10 . 11 from. The supports 13 . 14 are common among the leaf springs 10 . 11 in movement directions x and x 'movable, so that a force F, with which the leaf springs 10 . 11 one of the back connection 8th counteract transmissible load, is changeable. For shifting the supports 13 . 14 becomes the adjustment mechanism 15 from a drive device 24 driven. The drive device 24 includes a handwheel for this purpose 25 and one with the handwheel 25 connected wave 26 , which with a spindle 27 the adjustment mechanism 15 connected is. Next to the spindle 27 includes the adjustment mechanism 15 two with the cassette 9 connected bearing blocks 28 . 29 and a driver 30 , Here is the driver 30 on the cassette 9 secured against rotation and thus depends on the direction of rotation of the spindle 27 that about the shaft 26 from the handwheel 25 is actuated, transported in the direction of movement x or in the direction of movement x '. The two supports 13 . 14 are with the driver 30 connected and move accordingly along with this on their lanes 16 to 19 in the direction of movement x or in the direction of movement x '. The mechanical assembly 2 also shows a through hole 31 , which the lower housing part 6 and the cassette 9 penetrates. Like in the 3 shown schematically serves the through hole 31 the inclusion of a lanyard 32 which as a pen 33 is trained.

Through the pen 33 becomes the cassette 9 on the lower housing part 6 secured, with the cassette 9 a nose 34 has, with which this the lower housing part 6 engages below. As seen from the top of the 3 reveals the housing base rotates 6 the cassette 9 with three adjacent side walls 35 . 36 . 37 where the side wall 36 from the nose 34 is under attack. Through the three side walls 35 to 37 forms the lower housing part 6 a tub 38 in their deepening 39 the cassette 9 in the assembled state is and is fixed.

In the 6 is the one from the 1 known chair 1 shown again in side view. In contrast to the representation of the 1 Here is also an upper housing part 40 pictured the cassette 9 , the leaf springs 10 . 11 and the built-in parts 12 covered and in a recording room 41 , which through the lower housing part 6 and the upper housing part 40 is enclosed.

For better understanding is in the 2 the lower housing part 6 shown in plan view and in isolation. The lower housing part 6 is designed as a cast aluminum component and includes on its side walls 35 and 37 flange 42 and 43 to the pivotable articulation of the in 1 shown swivel arm 7 , Furthermore, the housing lower part comprises 6 on its side walls 35 . 37 flange 44 . 45 for articulation in the 1 shown back connection 8th , The flange means 42 to 45 are integral with the side walls 35 . 37 educated. According to one embodiment of the invention, it is also provided to screw the flange means to the side walls and / or to pin and / or to weld.

In the 2 continues to be the already mentioned deepening 39 recognizable in which in the course of the installation in the 2 not shown cassette is used.

In the already mentioned 3 is then in plan view a finished pre-assembled module 46 shown, which in the lower housing part 6 is used. This includes the finished pre-assembled module 46 the cassette 9 , the leaf springs 10 . 11 and the built-in parts 12 , For the built-in parts 12 Specifically, these are the supports 13 . 14 and the adjustment mechanism 15 which is the spindle 27 , the bearing blocks 28 . 29 and the driver 30 covers and around the lanes 16 to 19 ,

In the plan view of the mechanical assembly 2 which in the 3 is shown with removed housing cover, are the lanes 16 to 19 recognizable, with the support 13 on the lanes 16 . 17 and the support 14 on the lanes 18 . 19 is guided. For better visibility of the details are the leaf springs 10 . 11 partially broken. Furthermore, in the 3 recognizable that the supports 13 . 14 perpendicular to the direction of travel x or x 'in lifting and lowering directions y and y' (see 1 ) slidably on the driver 30 are guided. As sliding guides 47 . 48 find dovetail guides here 49 . 50 Use. This makes it the Auflagern 13 . 14 possible, without jamming and / or jamming a course of the lanes 16 . 17 respectively 18 . 19 to follow.

In the 4 is a schematic side view exemplary of the road 16 shown, with the other lanes 17 to 19 (please refer 3 ) are made comparable. The roadway 16 is as a groove 51 designed, whose bottom 52 a height profile 53 having. The support 13 which is in the carriageway 16 is guided, is in the schematic representation of 4 shown in three different positions P13a, P13b and P13c. In comparison of these three positions P13a to P13c is recognizable as the support 13 through the height profile 53 the roadway 16 being affected. This includes the support 13 a contact agent 54 , which as a sliding shoe 55 is formed, and with which the support 13 in the groove 51 slides.

For further explanation is in the 5 schematically another lane 56 shown, which is a height profile 57 has, on individual road sections 58a to 58e Differences to that in the 4 having shown height profile. Unless of the in the 3 shown mechanical assembly, a spring characteristic is required, which by the in the 5 shown roadway 56 is fulfilled in the 3 shown cassette with lanes equipped with the appropriate height profile.

The 7 and 9 show in analogy to 3 an alternative embodiment of a mechanical assembly 102 , In the assembly 102 are for explanation leaf springs 110 and 111 different embodiments for a support 113 and roadways 116 . 117 or for a hangman 114 and roadways 118 . 119 shown.

From the 7 is recognizable that the support 113 only one contact shoe 113a and thus in the in the 7 shown installation position only in the road 116 is guided. Unless the mechanics assembly 102 with a different spring characteristic is needed, it is possible the support 113 on a sliding guide 147 from a driver 130 to separate. Subsequently, the support 113 rotated by 180 °, so that a second groove N113b, which is opposite to a first groove N113a, with the driver 130 is detachable. After the coupling then turns into the 9 shown situation in which the support 113 now with his shoe 113a with the second lane 117 works together. The roadways 116 and 117 have different height profiles. Thus, the spring characteristic changes depending on which of the two lanes 116 . 117 the support 113 with his shoe 113a works together. Of course, a leaf spring 110 before the described implementation of the support 113 from a housing base 106 the mechanical assembly 102 be separated. It is envisaged that form second support analogous to the first support.

For explanatory purposes, the second support has 114 unlike the first support 113 two sliding shoes 114a and 114b on and interacts with these with the lanes 118 and 119 together (see 7 ). Here are in the 7 only mounting sections 118a and 119a a cassette 109 shown. These are called shafts 118b and 119b trained, in which the in the 9 shown roadway inserts 118c and 119c be recorded.

Here is in the 8th the roadway insert 118c shown in sectioned side view. The roadway insert 119c is similar. The last-described embodiment thus has the advantage that the mechanical assembly 102 can be equipped with any roadways for the support. To replace the lanes, it is provided a leaf spring 111 and the support 114 dismantle and then insert or replace the desired lanes in the mounting sections.

The invention is not limited to illustrated or described embodiments. Rather, it includes developments of the invention within the scope of the patent claims.

LIST OF REFERENCE NUMBERS

1

chair

2

mechanics assembly

3

foot element

4

back element

5

seat element

6

Housing bottom

7

swing arm

8th

back connection

9

cassette

10

leaf spring

10a

first end area

10b

the central region

10c

second end area

10d

Top of 10

11

leaf spring

11a

first end area

11b

the central region

11c

second end area

11d

Top of 11

12

fitting

13

In stock

14

In stock

15

adjustment

16

roadway

17

roadway

18

roadway

19

roadway

20

admission

21

admission

22

Stop by 8th

23

Stop by 8th

24

driving device

25

handwheel

26

wave

27

spindle

28

bearing block

29

bearing block

30

takeaway

31

Through Hole

32

connecting means

33

pen

34

Nose of 9

35

Sidewall of 6

36

Sidewall of 6

37

Sidewall of 6

38

tub

39

deepening

40

Housing top

41

Recording room between 6 and 40

42

Flange means for 7

43

Flange means for 7

44

Flange means for 8th

45

Flange means for 8th

46

module

47

Sliding guide from 13 at 30

48

Sliding guide from 14 at 30

49

dovetail guide

50

dovetail guide

51

groove

52

Ground of 51

53

Height profile of 52

54

Contact agent of 13 respectively. 14

55

shoe

56

another lane

57

Height profile of 56

58a-58e

road section

102

mechanics assembly

106

Housing bottom

109

cassette

110

leaf spring

111

leaf spring

113

In stock

113a

Sliding shoe from 113

114

In stock

114a

Sliding shoe from 114

114b

Sliding shoe from 114

116

roadway

117

roadway

118

roadway

118a

mounting portion

118b

shaft

118c

road use

119

roadway

119a

mounting portion

119b

shaft

119c

road use

130

takeaway

147

Sliding guide between 130 and 113

N113a

Groove of 113

N113b

Groove of 113

P13a-P13c

Position of 13

S7

swivel axis

S8

swivel axis

S57

swivel axis

S58

swivel axis

x

movement direction

x '

movement direction

y

lifting direction

y '

lowering direction

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 3335463 A1 [0002]

Claims (13)

Mechanism assembly for a chair, wherein to the mechanical assembly, a foot member, a back member and a seat member is articulated and wherein the mechanical assembly comprises a connectable to the foot member housing base, characterized in that - the mechanical assembly connectable to the seat member swing arm and connectable to the back member Back connection comprises, - wherein the swing arm is pivotally hinged to the housing lower part, - wherein the back connection is pivotally hinged to the housing lower part, - wherein the swing arm via the seat element with the Rückenabbindung is coupled, - wherein the mechanical assembly further usable in the lower housing part cassette and at least one leaf spring comprises, - wherein the mechanical assembly further comprises as mounted to the cartridge connected parts at least one adjustable support and a displacement mechanism for the support, - wherein the cassette at least a carriageway comprises, - wherein the support is guided on at least one of the formed on the cassette lanes and wherein the support moving adjusting mechanism is mounted on the cassette, - wherein the leaf spring is fixed to a first end portion in a receptacle in the housing lower part with a central region rests on the support and the back connection is supported with a second end region such that the leaf spring is bent over the support. Mechanical assembly according to claim 1, characterized in that the cassette is formed in particular from plastic and that the cassette is connected by at least one connecting means with the housing lower part, wherein the connecting means is in particular designed as a pin and / or as a screw. Mechanical assembly according to one of the preceding claims, characterized in that the housing lower part is designed as a trough, which comprises at least three side walls, wherein the cassette is arranged in a recess formed by the trough. Mechanical assembly according to one of the preceding claims, characterized in that the mechanical assembly comprises an upper housing part, wherein the upper housing part covers the cassette, the at least one leaf spring and the mounting parts such that they are arranged between the lower housing part and the upper housing part. Mechanical assembly according to one of the preceding claims, characterized in that the roadway is formed on a surface of the cassette. Mechanical assembly according to one of the preceding claims, characterized in that the support is adapted to one of the lanes or on several identical lanes. Mechanical assembly according to one of the preceding claims, characterized in that the carriageways of the cassette are formed differently and parallel track sections in particular have different slopes. Mechanical assembly according to one of the preceding claims, characterized in that the individual roadway is formed in particular by a running in the direction of movement of the support groove. Mechanical assembly according to one of the preceding claims, characterized in that the support comprises at least one contact means which is in contact with one of the lanes, wherein the contact means is in particular formed as a sliding shoe. Mechanical assembly according to one of the preceding claims, characterized in that the support is assigned either in a first position of a first roadway or in a second position of a second roadway, so that different spring characteristics of the mechanical assembly are generated in comparable positions of the support. Mechanical assembly according to one of the preceding claims, characterized in that the cassette can be combined with a first lane and at least one second lane, wherein the lanes are designed as roadway inserts and wherein the cassette for receiving the first roadway forming first roadway inserts or for receiving a the another roadway forming further roadway use has a mounting portion on which one of the roadway inserts is fixed, wherein the mounting portion is formed in particular as a shaft in which one of the roadway inserts can be used. Mechanical assembly according to one of the preceding claims, characterized in that the support relative to a driver of the displacement device is displaceable in a spatial direction and in particular is separable from the driver. Chair, characterized in that the chair comprises a mechanical assembly according to at least one of the preceding claims, a foot member, a back member and a seat member.

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