The specific embodiment
Fig. 7 shows the stereogram of chair; It comprises the five-pointed star shape pedestal 1.1 that is provided with castor (coaster), the backrest 3 that is supported on pillar 1, the seat support 100 on this five-pointed star shape pedestal and has two back support 3.1; These two back support are along the layout that laterally is spaced apart from each other; And being connected to L shaped supporting member 4, each supporting member is made up of the supporting part 4.2 of supporting part that roughly vertically is provided with 4.1 and approximate horizontal setting.Each back support 3.1 is installed to fixed component 7, and this fixed component 7 can be regulated along relevant supporting part 4.1, thereby takes the different height adjusting position.Each fixed component 7 all comprises rubber element, and each back support can be with respect to supporting part 4.1 motions like this.Supporting part 4.1 interconnects through the transverse bar 9 of elastically deformable, and the spring rate of this transverse bar is designed to the freely-movable property of each back support with respect to another back support remained in the limited range.
According to Fig. 1 to Fig. 3, supporting part 4.2 is supported for and can be pivoted around horizontal pivot axis line 5 by support unit 2.The supporting part 4.2 of supporting member 4 is embodied as two-part bar, and the spring element 6 that wherein roughly is vertically oriented acts on the free rod end 4.3 of bar, and can change the power that acts on the spring element on the supporting member.Spring element 6 can be extension spring, pneumatic or hydraulic spring grease cup element etc.
The interior engaging opening 8 in zone that is arranged on support component 4.1 shows that clearly fixed component 7 is installed on the supporting part 4.1 with Height Adjustable mode.According to Fig. 2; Back support 3.1 roughly links to each other at their transverse bar 3.2 of central authorities through elastically deformable; The Intensity Design of this transverse bar 3.2 becomes to make back support 3.1 keep their functions as single support member; Wherein, back support is maintained in the limited range with respect to the freely-movable property of another back support.
According to Fig. 3, said two back support 3.1 also are installed in respectively on the supporting part 4.1 of their supporting members 4 separately, thereby are rubber-likes separately.In this embodiment of backrest, fixed component 7 is designed so that the upper end of support component 4.1 extends upwardly out above fixed component 7.The free end of supporting part 4.1 interconnects through the transverse bar 9 of elastically deformable.
Fig. 6 shows the modification embodiment of supporting member, and this supporting member can pivot around horizontal axis.In support unit 2 or on support unit 2, be provided with trunnion axis 20, this trunnion axis 20 has reverse thread; On this trunnion axis, be supported with second shank 4.2 of supporting member 4 pivotly.Each shank 4.2 all is embodied as the caliper bar, and the free rod end 4.4 of this caliper bar is bent upwards, and the extension spring 22 of approximate horizontal orientation is installed.In order to change the power that acts on the supporting member, extension spring 22 is installed on the adjustment means 23 through their end, and this adjustment means 23 can be adjusted to different spacings with respect to horizontal axis; This adjustment means is holding nut 24 for example, this nut with can engage through the threaded 25 that knurled wheel 26 rotates.Each shank 4.2 is supporting screw-thread bush 27 in it is supported on the zone at the supporting position of axle on 20; Like this; When axle 20 rotations; Two shanks 4.2 are regulated owing to this reverse thread portion of 20 in the horizontal relative to each other, thereby can regulate according to the spacing between the back support 3.1 of Fig. 1 and Fig. 3.
Fig. 8 and Fig. 9 show the details of the chair base frame 38 of the upper end that is installed to pillar 1; Wherein, Said two supporting members 4 are installed on the pillar 1 in the zone of the free end of supporting part 4.2, thereby supporting member 4 can pivot around the pivot axis that schematically shows 39.On chair base frame 38 for example through screw 41 fastening roughly be the seat bottom structure 40 of box-like, these screws 41 are by guiding the slotted eye 42 that is arranged at seat bottom structure 40 places in, feasiblely can move forward and backward seat bottom structure 40 with respect to chair base frame 38.
The inventive principle of this structure below will be described by means of the indicative icon of Fig. 9.
The main thought of instruction of the present invention is that basically said two back support 3.1 are coupled to each other, thereby the people on being sitting in chair (stool) changes when taking one's seat the position, and back support for example backward motion forces another back support to travel forward.Because the resilient suspension of back support on supporting member 4; Said two back support 3.1 can be in a kind of like this position; That is, form roughly evenly continuous backrest, at this moment; The user of stool or chair when lateral inclination, will compare a back support more effectively against or promote another back support 3.1 (in Figure 10, being a back support on the right).The pressure that realizes said two back support 3.1 through guide rod 43 connects, thereby carries out motion in the opposite direction, and this guide rod 43 is approximately perpendicular to supporting member 4 orientations when active position not; This guide rod supports is in seat bottom structure 40 or be supported on the seat bottom structure 40, and is connected to support component 4.2, thereby when a back support 3.1 is moved backward, another back support will promptly travel forward round about.In Figure 10, show the deflection angle of guide rod 43 with exaggerative mode with respect to the center for the illustration principle.In fact, this deflection angle is very little, makes that the very little motion in ten/several millimeters scopes is only carried out in the end of guide rod 43 when pivoting, and like this, these motions will be by the tolerance compensating of structure.
The end of guide rod 43 for example is connected to corresponding supporting part 4.2 through the ball-and-socket joint 44 that schematically shows among Fig. 8 b, and said ball-and-socket joint preferably is supported in the axle sleeve 44.1 of elastically deformable.Guide rod 43 also preferred by the ball-and-socket joint 45 shown in Fig. 9 a in the longitudinal bracing spare 40.2 that pivotally is supported on seat bottom structure 40 in its middle section between the tie point of supporting part 4.2 or on it.
Supporting part 4.2 is supported by the helical spring 46 that is arranged on the seat bottom structure 40, thereby said two back support 3.1 are identical apart from the distance of seat bottom structure 40 at the non-working position that does not load, thereby guide rod 43 is in non-effect or centre position.
According to Fig. 9, supporting part 4.2 has the projection 47 towards the top, and guide rod 43 pivotally is connected on the said projection 47.Pressing plate 48 links to each other with projection 47, and the connector 49 of the framework 40.1 of these projections through passing box-like seat bottom structure 40 is supported on the helical spring 46, and these helical springs 46 are arranged in the seat bottom structure 40 with the mode perpendicular to pivot axis 39.Helical spring 46 is supported on can be along on the slide block 50 of the longitudinal sliding motion of spring, and slide block 50 is placed in again on the cam 52 of camshaft 51, and this camshaft can rotate under the effect of handle 53, thereby can change the pretension of spring 46 through the rotation of cam 52.
Be directed in the arc guide recess 54 of guide rod 43 in the framework 40.1 of seat bottom structure 40, the imaginary axis line parallel of guide recess 54 is in the pivot axis 39 of supporting member 4, and crooked towards the bottom and towards the rear portion from the top with respect to the place ahead of chair.
Guide recess 54 makes guide rod 43 in the zone of ball-and-socket joint 45, to do to pivot or banking motion, and like this, when supporting part 4.2 rearward pivoted, this supporting part was also by downward pivot, and simultaneously, relative support component 4.2 pivots with opposite motion.
Fig. 8 shows the situation that said two supporting parts 4.2 are in middle position, and at this middle position, two supporting parts 4.2 roughly are parallel to each other, and this moment, said two back support 3.1 did not receive to load or receive uniform loading.
When the user recedes under the situation that two back support 3.1 are evenly loaded; Guide rod 43 moves backward and moves along with this; Thereby because in the longitudinal bracing spare 40.2 or the pivoted supporting role of the guide rod on it 43; Whole seat bottom structure 40 is pulled rearward moving on the one hand, and its Background Region pivots downwards simultaneously or descends on the other hand; This is to realize according to disclosed part seat support support part with lazy-tongs among DE 299 08 599 U1 because this structure is known, from rather than theme of the present invention.
This lazy-tongs are used for when backrest is pivoted forward or backward, making seat support to pivot with predetermined angle ratio.
The power that the motion towards the rear of seat bottom structure 40 has overcome stage clip 60 realizes; Said stage clip is supported between gripper shoe 61 and the stayed surface as the part of movable seat support polycrystalline substance 40; This gripper shoe 61 is static, and forms the part of chair base frame 38.
Fig. 4 and Fig. 5 show for back support 3.1 can be pivoted around vertical axis and horizontal axis with respect to fixed component 7, and fixed component 7 is how to be installed on the back support.Be box-like and upwards be provided with two wall parts 10.1 at place, end, these two wall parts be spaced apart from each other location and preferred shape triangular in shape towards fixed component 7 with the main body 10 of downward direction upper shed; These two wall parts have relative bearing opening 10.11.The bearing insert 11 of horizontal alignment is installed on fixed component 7, and like this, after pivot pin 12 was passed the bearing insert 11 that aligns with bearing opening 10.11, main body 10 just was pivotally attached to fixed component 7.According to Fig. 5, the location has rubber stopper 14, this retainer to be provided with the recess 14.1 suitable with the shape of bearing insert 11 in the space between main body 10 and fixed component 7.The spring rate of rubber stopper is designed so that to such an extent that main body 10 can be wound the horizontal axis that is limited pivot pin 12 and carried out controlled pivoting action.
Main body 10 is provided with opening in a side of fixed component 7 dorsad, and this opening is limited at above-below direction wall part 10.2.Wall part 10.2 is provided with bearing opening 10.21.The tightening member 13 that can screw in the rear portion of each back support 3.1 regularly has the bearing insert 13.1 that is vertically oriented, and this bearing insert supports the separating part 13.2 that radially outward stretches out.When bearing insert 13.1 alignd with bearing opening 10.21, pivot pin 14.2 can pass these bearing openings 10.21 and bearing insert 13.1, thereby main body 10 is installed as and can on tightening member 3, pivots around vertical axis.Separator 13.2 defines two reception spaces that are used for spring element 15 (being preferably the cylindricality rubber stopper) in sleeve shaped main body 10, the size of these spring elements and spring rate are chosen as and make the vertical axis that can center on pivot pin 11 qualifications between tightening member 13 and the main body 10 carry out limited relative motion.