ARRANGEMENT IN A CHAIR, ESPECIALLY FOR REGULATING THE LEVEL OF THE SEAT, ETC.

Abstract: The present invention relates to an arrangement in a chair, especially for regulating the level of the seat, etc., comprising a rack or carrier frame (3) extending upwardly from a base (2), on which carrier frame for example a seat member (4) is removably attached, by detachable holding means (6a, 6b) for in detached position allowing sliding along said frame (3) for affixing at various levels, and for the purpose of providing an arrangement involving both simplified regulation of chair member level, as well as variation in the appearance of the chair, its field of use and mobility; it is according to the invention suggested that said carrier frame or carrier rack (3; 103; 203; 403) comprises at least one pair or set of substantially parallel elongated means (3a, 3b; 103a, 103b; 203a, 203b, 203c; 303a, 303b; 403a, 403b) having at least an intermediate slot (5; 105; 205a, 205b; 305; 405), and that in the area of said slot there are provided chair member carrying holding means (6a, 6b; 106a, 106b; 206; 306a, 306b; 406a, 406b), which holding means comprise friction elements (7x, 7y, 7z; 107x, 107y, 107z; 207w, 207x, 207y, 207z) which in a first chair member carrying position (Fig. 3) will induce a locking effect against the rod-shaped means, and which in a second released position of said chair member carrying means (Fig. 4) will be released from its locking effect against said elongated means for thereby allowing a displacement of said chair member carrying means to various level positions.

Description: ARRANGEMENT IN A CHAIR, ESPECIALLY FOR REGULATING THE LEVEL OF THE SEAT, ETC. Field of the invention The present invention relates to an arrangement in a chair, especially for regulating the level of the seat, etc., comprising a rack or carrier frame extending up¬ wardly from a base, on which carrier frame for example a seat member is removably attached, by detachable holding means for in detached position to allow sliding along said frame for affixing in a new level position. Prior Art From US 2 712 348 (J.E. Cooper) there is known a dental chair, comprising a seat member carried by a vertical rod which in turn can be moved in a vertical shaft. The rod is provided with a plurality of ring-shaped recesses communicating with a T-shaped guiding pin for adjusting the seat at various levels. From FR 1 086 136 (Legrand) there is known a correspond¬ ing dental chair, wherein the level regulation of the seat takes place in that a carrier rod provided with a plurality of holes can be guided up and down in a verti¬ cal pipe, the level position of the seat being determined by passing a bolt through an appropriate hole, at the same time as the bolt will abut against recesses upper- most in the vertical pipe. Object of the invention An object of the present invention is to provide an ar- rangement in a chair, of the type as mentioned in the preamble, which in a simpler and safer manner will allow alteration of the seat level, etc. Another object of the present invention is to provide an arrangement in a chair, which can be designed by rela¬ tively simple basic elements, but which nevertheless will render large freedom of choice as regards embodiment and rational use. Still another object of the present invention is to pro¬ vide arrangements in chairs which can be manufactured from various types of material, but which nevertheless render a large degree of freedom of the choice of poss¬ ible design shapes, it being chairs for home use or office use, conference chairs, working chairs, etc. Yet another object of the present invention is to provide arrangements in chairs, wherein both seat, back support and neck support can be chosen optionally, at the same time as the same can be regulated within wide ranges. Summary of the invention Such objects can be realized in an arrangement as stated in the preamble, which according to the invention is characterized by the features appearing from the append¬ ing patent claims. Further features and advantages, as well as specific embodiments of the invention, will appear from the fol¬ lowing description taken in connection with the drawings, as well as from the appending patent claims. Brief description of the drawings Fig. 1 is a perspective view of a first embodiment of an arrangement in a chair according to the invention, where- in only the basic rack and a seat hoop are illustrated. Fig. 2 is a schematic view similar to Fig. 1, wherein the embodiment here is illustrated with an upholstered seat and attached back support and neck support. Fig. 3 illustrates in side view and on a larger scale details of a first embodiment of holding means according to the present invention, in a first locking position. Fig. 4 is a view similar to Fig. 3 and illustrates the holding means in a second released position. Figures 5 and 6 are schematic perspective views of a second and third embodiment, respectively, of an arrange¬ ment in a chair according to the invention, provided with a second embodiment of holding means according to the invention. Fig. 7 illustrates in side view and on a larger scale details of a second embodiment of holding means according to the present invention, in a first locking position. Fig. 8 is a side view similar to Fig. 7, and illustrates the holding means in a second released position. Fig. 9 is a perspective view on a larger scale illustrat- ing details in a third embodiment of the holding means according to the present invention. Fig. 10 is a perspective view of still another variant of an arrangement in a chair according to the invention, including a specific form of longitudinal means. Fig. 11 is a perspective view of yet another variant of an arrangement in a chair according to the invention, provided with a specific embodiment of arm rests. Fig. 12 is a perspective view of the frame of still another variant of an arrangement according to the inven- tion, wherein the chair member is built together with a table member. Fig. 13 illustrates perspectively the same frame as in Fig. 12, but here provided with seat, back support and neck support on the chair member, as well as two table plates on the table member. Description of embodiments In Fig. 1 there is perspectively illustrated a view of a first embodiment in a chair according to the invention, wherein the arrangement itself is designated by reference numeral 1 , and wherein only the basic rack or carrier frame and a seat hoop are illustrated for the sake of survey. The arrangement 1 itself thus comprises a base 2 compris¬ ing two substantially parallelly extending side legs 2a and 2b, respectively, having an intermediate yoke 2c. From the base 2 there extends upwardly a carrier frame or rack which here is generally designated by reference numeral 3, and which is so adapted that a hoop 4 which can constitute the support of a seat, or similar, can be regulated to various height levels. The carrier frame or rack 3 comprises at least a pair of substantially parall¬ el elongated means, here provided as two substantially hoop-like means 3a and 3b, respectively, which therebe¬ tween define an intermediate slot 5. In the area of the slot, or slots 5, there are provided individual holding means 6a and 6b, respectively, as this is illustrated on a larger scale in Figures 3 and 4. It is to be understood that in a first embodiment the hoop-shaped substantially parallelly elongated pipe- or rod-shaped means 3a, 3b can have such a shape as regards the choice of material and dimensions, that the inter- mediate slot 5 can be regulated by mutual flexibility between said hoop-shaped means 3a, 3b. This involves that the seat carrying hoop 4, as this is illustrated in detail in Fig. 3, in a first, here for example approxi- mately horizontal position, will allow the holding means 6a, 6b to exercise a clamping effect of the rod-shaped means 3a, 3b, such that the holding means 6b themselves including their respective friction elements, here the three respective friction elements 7x, 7y, 7z, will come in frictional contact between said longitudinal means 3a, 3b. However, it is to be understood that in other embodiments the longitudinal pipe- or rod-shaped means can be stiffer, such that the slot therebetween will be less flexible, which requires a somewhat different design of the respective holding means and the friction elements thereof. In Fig. 3 it is thus illustrated that the rod-shaped means 3a, 3b have been pressed somewhat together higher up, which is due to the fact that the means 3a, 3b at the top, see Fig. 1, lack any mutual connection. If the seat hoop 4, as this is illustrated in Fig. 4, is lifted somewhat upwards in the direction of the arrow A, such that the hoop 4 will take an inclined angle, the rod-shaped means 3a, 3b will be displaced somewhat from each other, for thereby taking a substantially parallel position in relation to each other, and thereby appropri¬ ately widening the slot 5' somewhat, such that the hoop 4 as such can more easily be guided upwardly or downwardly, as indicated by the double arrow B-B, and consequently change the seat level as required. After the regulation has been finished, the seat hoop 4 can be moved back to the substantially horizontal posi- tion as illustrated in Fig. 3, whereafter the friction elements 7x-7z once again will be in contact with the respective hoop-shaped longitudinal means 3a, 3b, poss¬ ibly in the now somewhat narrower slot 5, especially as regards the friction elements 7y, but also on opposite zones of the hoops in relation to said slot, which is specifically the case for the "outer" friction elements 7x and 7z. If no flexible affect had existed between the two hoop- shaped means 3a, 3b, it would have been the inclined position of the friction elements 7x-7z which would have been determining as regards the locking position illus¬ trated in Fig. 3 and the regulating position illustrated in Fig. 4. In Figures 1 , 3 and 4 it is illustrated that said fric¬ tion elements 7x-7z are affixed by means of throughgoing bolts 8x, 8y and 8z, respectively, which affixing is so adapted that a small turning movement can be allowed for the respective friction elements 7x-7z. This involves that said means 8x-8y will allow a small turning of the respective elements for in a first locking position to induce a friction effect against said rod-shaped means, and in a second position to be released from said fric¬ tion effect. Fig. 2 is a schematic view similar to Fig. 1, but herein the previously discussed seat hoop 4 is provided with an upholstered seat 9, which can have its level regulated by means of said seat hoop 4 and said previously discussed seat member carrying holding means 6a, 6b. Besides, the chair according to Fig. 2 is provided with a back support 10 which for example can be permanently mounted at the upper portion of the front hoop 3a, as well as being provided with a neck support 11 affixed at the upper portion of the second hoop 3b, for example by means of attachment means 12 which have been adapted for level adjustment of said neck support 11. In Figures 5 and 6 there are perspectively illustrated views of a second and a third embodiment, respectively, of an arrangement in a chair according to the invention, both mentioned embodiments being provided with a second embodiment of holding means according to the invention. Consequently, Fig. 5 illustrates an arrangement 101 hav¬ ing the same elements as illustrated in Figures 1 and 2, but with reference numerals in 100-series, whereas Fig. 6 illustrates an arrangement 101' having the same elements as illustrated in Fig. 2, but in 100'-series. The difference between the embodiments according to Figures 5 and 6, in relation to the previously discussed embodiments according to Figures 1-4, reside in the embo¬ diment itself of the holding means 106a, 106b, respec- tively, of the arrangement according to Fig. 5, as well as the holding means 106a', 106b' of the embodiment ac¬ cording to Fig. 6. These differences are illustrated in further details in Figures 7 and 8, wherein Fig. 7 with reference specifi¬ cally to Fig. 5, in side view and on a larger scale illu¬ strates the seat 109 with its seat hoop 104 in an app¬ roximately horizontal position, which involves that the individual friction elements 107x, 107y and 107z will have a clamping and affixing friction effect in the slot 105 between the respective longitudinal pipe- or rod- shaped means 103a and 103b, as well as against outer portions thereof. In Fig. 8 the seat 109 with its hoop 104 has been lifted somewhat in relation to the position illustrated in Fig. 7, which is indicated by the arrow C. If one also here uses hoops without any permanent connection at the top, this will involve that the slot 105' between the elong¬ ated means 103a and 103b can be expanded somewhat for thereby rendering a larger clearance for the central friction element 107y, such that the seat frame 104 together with said holding means 106a, 106b more easily can be displaced upwardly or downwardly, see the double arrow D-D. It is to be understood that the outer friction elements 107x and 107y can here be designed as cylinder- shaped rollers, or similar, manufactured from an appro¬ priately soft material, for example plastic or rubber, whereas the central friction element 107y may have a somewhat elongated shape with appropriate abutting sur¬ faces which can render an appropriate large friction contact when said friction elements induce a friction locking effect, this taking place either by pressing together said hoops to provide a narrower slot therebe¬ tween, or by an appropriate inclined position of said friction elements. It is also to be understood that said central friction element 107y can have not only a differ¬ ent design, but can also be manufactured from material having different elastic characteristics that the oppo¬ site, outer friction elements 107x and 107z. In order to avoid unintended regulation of the chair seat 109 there may appropriately be provided a locking bolt 120, which appropriately can be inserted in a hole 121 in the outer fittings constituting the holding means 106b, which involves that by inserted locking bolt 120 in the hole 121 the seat 109 with said seat frame 104 cannot be moved out from the approximately horizontal locking posi¬ tion illustrated in Fig. 7, wherein specifically the central friction element 107y induces its friction effect, whereas the outer friction elements 107x and 107z function in a manner which can be compared with a pole climber. In Fig. 9 there is illustrated a perspective view on a larger scale of details of a third embodiment of holding means according to the present invention, here generally designated by reference numeral 206, whereas a seat car- rying hoop is designated by reference numeral 204, there being here provided not only two but three substantially vertically protruding parallel means 203a, 203b and 203c, respectively, which involves that between said means there will be provided two slots 205a and 205b, respec- tively. Further, the holding means 206 itself comprises four friction elements 207w, 207x, 207y and 207z, respec¬ tively, having the same functional properties as the previously discussed friction elements. It is to be un¬ derstood that the substantially parallel upwardly extend- ing means 203a, 203c can be provided as plank-shaped means extending along the overall width of the seat hoop 204, or a similar hoop which is to carry a chair member, which has been depicted in further details in Fig. 10. In Fig. 10, which is founded on the principle according to Fig. 9, there is illustrated perspectively a further variant of an arrangement 301 according to the present invention, comprising a base 302 carrying two plank- shaped substantially parallelly upwardly extending rack or frame means 303a and 303b, respectively. Between said parallel upwardly extending means 303a and 303b there is consequently defined a slot 305 and in the area of said slot 305 there are provided chair member carrying holding means 306 and 306b, which in this case carry a chair seat 309 which in an appropriately upwardly tilted position can release said holding means 306a and 306b for regulating the seat level in relation to the ground or the base 302. The arrangement is also here pro- vided with a possibly level adjusting back support 310 as well as an adjustable neck support 311, which adjustment can be effected for example along a recess 312 in the upper portion of the rear plank-shaped upwardly extending means 303b. The base 302 comprises here an elongated main member 330, wherefrom at each end there is protruding a crossing arm 331. In Fig. 11 there is perspectively illustrated still another variant of the arrangement 401 of a chair accord¬ ing to the invention, comprising a base 402 which other¬ wise carries substantially parallel elongated pipe- or rod-shaped means 403a and 403b, defining therebetween a slot 405, as well as holding means 406a and 406b which here carry a seat 409 which, in a similar manner as dis¬ cussed previously, can have its level regulated. Besides, the arrangement 401 comprises further holding means 406aa and 406bb carrying arm rests 413 which can also have the level thereof regulated. In Fig. 12 there is illustrated the frame work of still another embodiment of an arrangement 501 according to the invention. The arrangement 501 comprises here a common base 502 which carries a chair member 501A and a table member 501B, respectively. The chair member 501A comprises a first set of elongated p pe- or rod-shaped means 503a and 503b, defining there¬ between a slot 505, as well as holding means 506a and 506b which here carry a seat hoop 509 which can have its level regulated. Correspondingly, said table member 501B comprises a se¬ cond set of substantially pipe- or rod-shaped means 503aa and 503bb defining therebetween a slot 505a. In the slot 505a there are provided three different sets of holding means, a lower set 506aa and 506bb carrying a lower hoop 509ab, a central set of holding means 506cc and 506dd having a central hoop 509cd, as well as an upper set of holding means 506ee and 506ff carrying an upper hoop 509ef It is to be understood that all of said hoops 509ab, 509cd and 509ef of the table member 501B can have its level regulated, in the same manner as discussed previ¬ ously, and in the same manner as said chair hoop 509 of said chair member 501A, which involves that the arrange¬ ment 501 can constitute an adjustable working place, for example a mobile working place as illustrated in Fig. 13. In Fig. 13 it is illustrated that the chair member 501A has been provided with a chair member 509, a possibly adjustable back support 510 and an adjustable neck sup¬ port 511, and that the chair member 501B has been pro¬ vided with an upper plate 516 carried by the upper ad¬ justable hoop 509ef, and a central plate 515 carried by said central hoop 509cd, whereas bottom hoop 509ab poss¬ ibly can constitute a support for a not illustrated foot support. It is to be understood that said illustrated arrangement of course can be varied within wide limits in view of the principle suggested by the invention. Further, it is to be understood that the arrangement according to the in¬ vention can be used not only for carrying chair seats, back supports, neck supports, etc., but can be used for carrying arm supports, as well as other means or facili¬ ties serving for alternative use and sitting positions. Further, it is to be understood that the position of for example a seat not necessarily must be horizontal in its locking position, but can take any slanting downwardly extending or slanting upwardly extending locked position, provided the seat will allow for a release by further lifting of the seat front and seat adjustment in said released position. Further, it is to be understood that the embodiments illustrated specifically in Figures 9 and 10, can be provided with friction elements having undulated sur- faces, which undulated surfaces may then correspond to opposite undulated surfaces of the substantially parallel elongated means protruding upwardly from the base of said arrangement. It is also to be understood that the seat or other chair members can be permanently locked, not only by means of pins or bolts and corresponding recesses, but also by means of appropriate knobs or wheels or screws having an inherent tightening function. Possibly, there may be used a spring loaded locking means. It can also, as for example illustrated in Fig. 11, be used arm rests on the other illustrated embodiments, and such members can be permanent or adjustable according to the same principles as discussed previously. The arrangement according to the invention can of course include various shapes of the base, for example station- ary or mobile, depending on the field of use, which is also the case for those types of arrangements having common base and constituting so-called combined arrange¬ ments or combined furniture.

Claims: P a t e n t c l a i m s 1. Arrangement in a chair, especially for regulating the level of the seat, etc., comprising a rack or carrier frame (3) extending upwardly from a base (2), on which carrier frame for example a seat member (4) is removably attached, by detachable holding means (6a, 6b) for in detached position to allow sliding along said frame (3) for affixing at various levels, c h a r a c t e r i z e d i n that said carrier frame or carrier rack (3; 103; 203; 403) comprises at least one pair or set of substantially parallel elongated means (3a, 3b; 103a, 103b; 203a, 203b, 203c; 303a, 303b; 403a, 403b) having at least an intermediate slot (5; 105; 205a, 205b; 305; 405), and that in the area of said slot there are provided chair member carrying holding means (6a, 6b; 106a, 106b; 206; 306a, 306b; 406a, 406b), which holding means comprise friction elements (7x, 7y, 7z; 107x, 107y, 107z; 207w, 207x, 207y, 207z) which in a first chair member carrying position (Fig. 3) will induce a locking effect against the rod-shaped means, and which in a se¬ cond released position of said chair member carrying means (Fig. 4) will be released from its locking effect against said elongated means for thereby allowing a dis- placement of said chair member carrying means to various level positions. 2. Arrangement as claimed in claim 1 , c h a r a c t e r i z e d i n that said friction elements (7x, 7y, 7z; 107x, 107y, 107z; 207w, 207x, 207y, 207z) are suspended in means (8x-8y) allowing for a small turning of said respective elements for in a first lock¬ ing position to induce friction effect against said rod- shaped means, and in a second position to be released from said friction effect. 3. Arrangement as claimed in claim 1 or 2, c h a r a c t e r i z e d i n that said elongated means (3a, 3b; 103a, 103b; 203a, 203b, 203c; 303a, 303b; 403a, 403b) are provided without an upper connection, such that said elongated means to a certain degree can be pressed resiliently to and from each other for appropri¬ ate enlargement of the slot therebetween and thereby respectively amplify or release the locking effect between said means and said friction elements. 4. Arrangement as claimed in any of the claims 1-3, c h a r a c t e r i z e d i n that said carrier frame or carrier rack comprises one pair or set of substantial¬ ly parallel elongated pipe- or rod-shaped means provided on each side of the central plane of said chair and de- fining therebetween at least one respective slot. 5. Arrangement as claimed in any of the claims 1-4, c h a r a c t e r i z e d i n that said pair or set of substantially elongated parallel pipe- or rod-shaped means comprise individual front and rear means (103a, 103b, respectively), each frame means at the top merging into a first arch, and each rear means merging at the top into a second arch. 6. Arrangement as claimed in any of the preceding claims, c h a r a c t e r i z e d i n that said front means in each pair constitutes a first higher arch, whereas said rear means in each pair constitutes a lower arch, or vice versa, for example similarly to a paper clip having a certain resilient elasticity between said arches. 7. Arrangement as claimed in any of the claims 1-3, c h a r a c t e r i z e d i n that said arrangement (201; 301) comprises at least two substantially parallel elongated plank-shaped means (203a, 203b, 203c; 303a, 303b) having at least one respective slot (205a, 205b; 305) therebetween. 8. Arrangement as claimed in claim 7, c h a r a c t e r i z e d i n that said plank-shaped parallelly elongated means (203a, 203b, 203c) communicate with holding means (206) comprising friction elements (207w, 207x, 207y, 207z) extending substantially along the overall width of said plank-shaped means. 9. Arrangement as claimed in claim 7 or 8, c h a r a c t e r i z e d i n that said plank-shaped means are provided with wave-shaped surfaces, which match with opposite wave-shaped surfaces of said friction elements. 10. Arrangement as claimed in any of the preceding claims, c h a r a c t e r i z e d i n that said friction elements are manufactured from an elastic material, for example rubber or plastic, and that said friction elements possibly have been designed differently and with different elasticity. 11. Arrangement as claimed in any of the claims 1-9, c h a r a c t e r i z e d i n that said friction elements are manufactured from metal pieces, preferably having a width corresponding to the slot defined by locked position of the chair member in question. 12. Arrangement as claimed in any of the preceding claims, c h a r a c t e r i z e d i n that one carrier frame or carrier rack (501A) is provided on a common base (502) together with a functionally similar carrier rack (501B) for thereby constituting for example a combined furni¬ ture. 13. Arrangement as claimed in any of the preceding claims, c h a r a c t e r i z e d i n that said arrangement comprises a locking means (120) serving for locking said holding means (106a, 106b), especially for avoiding unin¬ tended regulation.

Inventors: MENGSHOEL HANS CHRISTIAN, MENGSHOEL, HANS, CHRISTIAN
Applicants: MENGSHOEL HANS CHR, MENGSHOEL, HANS, CHRISTIAN
Application year: 1996
Main classification: A47C3
IPC codes: A47C3