CN2623097Y

CN2623097Y - Back of chair

Info

Publication number: CN2623097Y
Application number: CN 03243063
Authority: CN
Inventors: H·费舍尔; M·施莱格尔; M·赛勒
Original assignee: Sedus Stoll AG
Current assignee: Sedus Stoll AG
Priority date: 2003-04-01
Filing date: 2003-04-01
Publication date: 2004-07-07
Anticipated expiration: 2013-04-01

Abstract

The utility model relates to a back of chair, which comprises a frame of an extended isolating plate (5); the frame comprises two side components (1) and two horizontal connecting plate (6,18), the lower horizontal connecting plate (6) is at the same level with the lumbar of user; the utility model is supported on a back supporting element (2) by the lower horizontal connecting plate (6) through a bearing member on an universal joint or a flexible connector (3) moving at the back; for the back is supported in all areas, so a comfortable degree for seating and backing is produced by an integrated structure combining the back with the flexible connector moving at the back on the back supporting element, the manufacturing cost is largely reduced, an aesthetic profile and an impressive structure are obtained.

Description

The backrest that is used for seat

Technical field

The utility model relates to the seat field, relates in particular to a kind of backrest that is used for office chair, and wherein this back support is on universal joint and by the flexible member supporting, and this backrest is installed on the backrest support.

Background technology

In office chair, be known that backrest is connected on the backrest support by this way, that is, so that it can be roughly moves and move with all of user back.Technically, this means backrest is installed on the universal joint that promptly, this backrest can move around three spatial axis.It can move with the sagittal of back like this, promptly not only can move around the trunnion axis that is parallel to health, also can reverse and move and laterally move, and promptly moves around vertical axis or around the trunnion axis perpendicular to health.The upper body of this form in fact often moves along the combination of three directions and takes place, for example when side direction touches the drawer of desk downwards, or when with someone talk and health when turning to.Also be called " flexible coupling of back motion " at the bearing part that is used on the universal joint of backrest.

For example in EP-A0308538, disclosed the seat of above form.In this known seats, the backrest of the form of the installation on universal joint by having spherical segment realizes that this backrest is installed on the backrest support with the form of second spherical segment.Backrest around its movably central point be positioned on the pad surfaces.Flexible member laterally be arranged between backrest and the backrest support and on the universal joint and under, this flexible member for example is the elastic polyester element, its vertical with and be parallel to backrest surface and apply elastic force.

Though this known seat provides the splendid comfort level of taking one's seat, its manufacturing needs certain expense.

Another seat with the backrest that is installed on the universal joint is disclosed in EP-A0935934.In this seat, the installation on universal joint is by means of the Elastic Cylindrical rubber element that has steel plate separately and realize, steel plate is formed on two end side of this rubber element by sulfuration, and this steel plate is connected on backrest or the backrest support by means of screw.Therefore the user can overcome the elastic force of elastic caoutchouc element and moving backrest.In addition, this backrest support also can overcome restoring force and press backward.In the face of being formed with the liner of rigid structure on user's the surface basically, this liner can be crooked in rubber bearing part zone at it.

Though this known seat has the following advantages, promptly, therefore universal joint comprises less individual components and can make at lower cost, but means there not be the optimal support of acquisition to the user back in the face of the conventional design on the surface of user's back rest cushion.In addition, the connecting mode of the backrest support on seat post be very complicated being connected of elasticity recovery element, and can not save cost.At last, it also has a shortcoming,, the elastic caoutchouc bearing part is not set that is, ftractures with protection: if the plate that sulfuration is formed on the elastic caoutchouc element separates, then backrest can break away from backrest support.

The utility model content

The purpose of this utility model is for providing a kind of backrest, it is installed on the universal joint and by this way by the flexible member supporting, that is, and on the one hand in all possible front and back, laterally or in the twist motion it provides optimal support to the user, and on the other hand, it is with lower cost manufacturing.In addition, guarantee that also this structure has advantages of higher stability in daily use.At last, backrest of the present utility model also becomes preferred plan attractive in appearance with the standard construction of industrial goods appearance design.

Thereby, a kind of foundation backrest that is used for seat of the present utility model realizes this purpose by being provided, a kind of like this backrest that is used for seat promptly is provided, wherein be bearing on the universal joint and be installed on this backrest support by this backrest of flexible member supporting, it is characterized in that: this backrest is designed to framework, and this framework has the dividing plate that extends therein; This framework comprises two side direction and sidepiece that approximate vertical is extended and two approximate horizontal cross connecting plates that extend, that connect this sidepiece; This upper lateral connecting plate connects this two sidepieces in the upper end of these two sidepieces; This lower, transverse connecting plate is being connected this two sidepieces with the concordant place of user's lumbar vertebrae; This dividing plate is fixed on these two sidepieces at least; And this backrest is installed on this backrest support by the flexible coupling that is fixed to the back motion on this lower, transverse connecting plate.

Core of the present utility model is following idea, promptly, become backrest by framework with the baffle plate configuration that in framework, extends, and come design framework by this way, on the one hand, its back to the user provides best supporting force, and on the other hand, it makes and is formed between backrest and the backrest support with mode attractive in appearance and technical cost-effective mode in the connection on the universal joint, and makes it stable.

Its result is, the flexible coupling of supporting member and back motion can be designed to viewable portion together, promptly, do not having under the situation of special liner, the manufacturing expense that it has not only reduced the quantity of individual components and has determined thus, but also make this design stay darker impression and realize higher enjoying value to the people.

The quantity of the structural member of the flexible coupling of back motion reduces to minimum, has therefore reduced manufacturing expense.Yet backrest of the present utility model has and prevents cracking: even be connected with sulfuration between the steel plate when separating when rubber buffer, backrest will can not fall down, but remain fixed on the supporting member.

Description of drawings

Followingly describe the utility model in conjunction with specific embodiments in detail with reference to accompanying drawing, in the accompanying drawings:

Fig. 1 shows the seat overall structure that has according to the backrest of the utility model design;

Fig. 2 illustrates the rear portion of backrest of the present utility model;

Fig. 3 shows the longitudinal cross-section of the flexible coupling of the back of the present utility model motion in the primary importance at rotary actuator; With

Fig. 4 illustrates the cross section of similar Fig. 3, but rotary actuator is in the second place.

The specific embodiment

Fig. 1 shows the side view of the office seating that comprises backrest, and this backrest has a flexible coupling 3 by part 1, backrest support 2, back motion, has the underframe 14 of Caster, pillar 15, leaning device 16 and bearing part 17.Backrest support 2 is connected with bearing part 17 with leaning device 16 in hinged mode, so that make backrest support 2 tilt synchronously with the decline at the rear portion of bearing part 17.The details of the mechanism with bearing and backrest Synchronization Control of this form is known, and for example DE-A 19640564.The sidepiece 1 of backrest has the groove 4 of longitudinal extension.Adjuster 9 is shown in the flexible coupling 3 of this back motion.

The sidepiece 1 that Fig. 2 shows backrest uses lower, transverse connecting plate 6 and upper lateral connecting plate 18, to form the framework that dividing plate 5 stretches therein.Framework preferably is made of plastics.Dividing plate 5 is preferably made by the elasticity of plastics fabric.It has the lateral edges that is surrounded by rolling, is sandwiched in by its this lateral edges in the groove 4 on two sidepieces 1 of framework.

Upper lateral connecting plate 18 is connected with it at two sidepiece 1 places of framework, and lower, transverse connecting plate 6 is being connected on two sidepieces 1 of framework with the concordant place of user's lumbar vertebrae.This makes back frame have stability with the minimum material expense, and, particularly make the tension force of dividing plate 5 maximum in lower, transverse connecting plate 6 zones and in the critical zone of user's lumbar vertebrae.The flexible coupling 3 of back motion is arranged in this zone of lumbar vertebrae equally.This overall combination results of the required element in supporting back best seating effect.In addition, this overall combination is in light weight and tangible, and firm and firm.

In order to make good seating comfort level more perfect, the pod 7 of ball and ball-and-socket joint formula is arranged on the upper lateral connecting plate 18 of framework, is installed in the pod 7 in the adjustable mode of gradient by neck spare 8.

In Fig. 3 and Fig. 4 in detail, the details of the flexible coupling 3 of back motion will be described.

This structure has the slow middle pad 10 of cylindrical rubber, and it is made by elastic rubber material, and

steel plate

11,12 is formed on its outside by sulfuration.At central part, rubber buffer 10 has recess, and steel taper ring is arranged in wherein.This steel loop forms cut-away down with steel plate 11,12.This steel loop screws in lower, transverse connecting plate 6 by means of screw element 20 and via following cut-away this steel plate 11 is fixed on the back frame.Steel plate 12 screws in backrest support 2.Its result is; the flexible coupling 3 of back motion has and prevents the protective effect of ftractureing: separate if be connected with sulfuration between the

steel plate

11,12 at rubber buffer 10; backrest will can not fall down, but keep being connected and keeping functional effect with supporting member 2 effective.At last, rotary actuator 9 is also shown in Fig. 3,4, this rotary actuator is formed from steel and has the form of columniform ring, the outer surface of this ring is cut sth. askew by this way, promptly, so that the height of this outer surface is in the distance that is substantially equal on the side between cross connecting plate 6 and the backrest support 2, and on opposite side its height less than this distance.When if this rotary actuator 9 is in position shown in Fig. 3, its motion that stops the top of the top of cross connecting plate 6 and backrest is selected.When the position that is in shown in Fig. 4, wherein this rotary actuator 9 rotates through 180 degree with respect to the position of Fig. 3, then can freely move in the top of this backrest.

The specific embodiment of having described effectively illustrates, and has comprised advantage according to the four corner of the utility model purpose according to backrest of the present utility model; Thereby it provides splendid seating comfort level by supporting the back best, and can make with the expense that reduces greatly than prior art, and with regard to industrial design, it provides structure attractive in appearance and can stay darker impression to design.

Claims

1. backrest that is used for seat wherein is bearing on the universal joint and is installed on this backrest support (2) by this backrest of flexible member (10) supporting, it is characterized in that:

This backrest is designed to framework, and this framework has the dividing plate (5) that extends therein;

This framework comprises two side direction and sidepiece (1) that approximate vertical is extended and two approximate horizontal cross connecting plates (6,18) that extend, that connect this sidepiece (1);

This upper lateral connecting plate (18) connects this two sidepieces (1) in the upper end of these two sidepieces (1);

This lower, transverse connecting plate (6) is being connected this two sidepieces (1) with the concordant place of user's lumbar vertebrae;

This dividing plate (5) is fixed on these two sidepieces (1) at least; And

This backrest is installed on this backrest support (2) by the flexible coupling (3) that is fixed to the back motion on this lower, transverse connecting plate (6).

2. backrest as claimed in claim 1 is characterized in that, this sidepiece (1) of this framework has the groove of longitudinal extension, and in this groove, this edge is surrounded by rolling this dividing plate (5) by its edge clamping.

3. backrest as claimed in claim 2 is characterized in that, the tension force of this dividing plate (5) is maximum in the zone of this lower, transverse connecting plate (6).

4. backrest as claimed in claim 1 is characterized in that, the pod (7) of ball and ball-and-socket joint formula is arranged on the upper end of this sidepiece (1) of this framework, installs by neck spare (8) and installs in this pod in the adjustable mode of gradient.

5. backrest as claimed in claim 1, it is characterized in that, the flexible coupling (3) of this back motion comprises rubber buffer (10), this cushion pad has by sulfuration formation steel plate (11 thereon, 12), steel taper ring (13) places this rubber buffer (10) and this steel plate (11 by this way, 12) in the central recess, promptly, so that itself and this steel plate (11,12) form cut-away down, and be independent of this steel plate (11 between this cross connecting plate (6) and the backrest support (2) at this rubber buffer (10), 12) supporting, this connection is by forming with this cross connecting plate (6) and being threaded of backrest support (2).