CN87104722A

CN87104722A - The height adjuster of elevatable desk and chair

Info

Publication number: CN87104722A
Application number: CN 87104722
Authority: CN
Inventors: 张纪
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-14
Filing date: 1987-07-14
Publication date: 1988-03-16

Abstract

The present invention is in the supporting arrangement of the inclination supporting leg that constant length is arranged, proposition can continuously change the technical scheme at supporting leg inclination angle within the specific limits easily, its basic ideas are that the axle that uses in the device is divided into fixed axis and shifting axle, each shifting axle is all combined with at least one tight lock device by an axle and a slider and is constituted, and includes at least two shifting axles in a complete supporting arrangement.For shifting axle can be moved easily, designed cuff type, slideway type and transferred three kinds of adjusting devices of rope type.In cuff type device be with the axle that connects two poles as shifting axle, at slideway type device and transfer in the rope type device be will be connected supporting leg or strut and supported material spool as shifting axle.

Description

The present invention relates to a class supporting arrangement, it highly can change, and is used to be installed in various tables and chairs (comprising operating desk and stool) and goes up the formation elevatable desk and chair.

The height of tables and chairs (relative altitude of tables and chairs at least) should adapt with dimensions of human figure.The highly inappropriate tables and chairs of long-term use are not only tired easily, and can cause bad figure, and are particularly unfavorable for the normal development of children's eyes and bone lattice.At present had the liftable chair of some kinds to use, practical liftable table is also uncommon, and the liftable desk seat of learning usefulness for children is particularly rare.The supporting arrangement of a known class elevatable desk and chair can be adjusted into several specific height; Known another kind of supporting arrangement has the pole that can change effective length, generally is used for the seat of higher gears.

The supporting arrangement that the present invention relates to is characterised in that: it is a system of bars, pole is supporting leg or supporting leg and strut, their length is changeless, the upper end is connected below the supported material, supporting leg tilts, prop up in ground the lower end, and the lower end of strut is connected on the supporting leg, and the connection between supported material, supporting leg and the strut all realizes by axle.

Task of the present invention is the solution that proposes to continuously change easily within the specific limits the supporting leg inclination angle in above-mentioned supporting arrangement, basic ideas are that the axle in the device is divided into fixed axis and shifting axle, further task is reasonably to design the structure of shifting axle, it can be moved easily and is locked in the appropriate location reliably.

Above-mentioned task is achieved in that each shifting axle (4a～4d) all combine formation by an axle (9) and a slider and at least one tight lock device, in a complete supporting arrangement, can not comprise fixed axis, but include at least two shifting axles, shifting axle is mounted between two supporting legs (1a) or supporting leg (1a) and the strut (2a), or be installed between pole (1b, 2b) and the supported material, or be installed in above-mentioned two positions simultaneously.

(3a～3c) promptly fix hinge, two objects that its connects can only have relative angular displacement that relative linear displacement can not be arranged to fixed axis.(4a～4d) promptly movably cut with scissors, two objects that its connects can have relative angular displacement also relative linear displacement can be arranged to shifting axle.For shifting axle can be moved easily, designed cuff type, slideway type and transferred three kinds of adjusting devices of rope type.

Cuff type device is characterised in that the axle that connects two supporting legs (1a) or supporting leg (1a) and strut (2a) is shifting axle (4a, 4b), and slider is the cuff that tight lock device is housed (10a, 10b) that is enclosed within on the supporting leg (1a).

Slideway type device is characterised in that the axle that connects supporting leg (1b) or strut (2b) and supported material is shifting axle (4c), slider is the slideway that is contained in below the supported material, be installed in pole (1b, 2b) upper end and with axle (9) that slideway links together be a part of tightly locking device.

Accent rope type device is the further improvement to slideway type device, it also has following characteristics except that the whole features with slideway type device: bands adjuster (6) is equipped with at the slideway middle part, roller (17) is equipped with in the upper end of pole (1b, 2b), roller also is equipped with in the lower end of supporting leg (1b, 1c), and the bands (21) that bears pulling force connects roller and bands adjuster.It is dual transferring the turnbuckle of rope type device, and the first tight lock device is identical with slideway type device, and the bands (21) that is leading roller (17) is the second tight lock device.Under the normal operating condition, two tight lock devices can independently be realized the tight lock of shifting axle position; When device was moved, at this moment the bands tight lock effect that do not recur only relied on the first tight lock device to realize tight lock.

Characteristics of the present invention are that it only relates to supporting arrangement, for the appearance design of tables and chairs leaves sufficient leeway, when a tables and chairs designer mixed these supporting arrangements in the tables and chairs of his design, these tables and chairs just became elevatable desk and chair, have strengthened the accommodation and the market competitiveness.The especially suitable upward formation liftable table of various tables that is installed in of this supporting arrangement.The advantage of cuff type device is simple, economical, can change the gradient of the face that is supported, and can be used for dining table, desk, reading-desk, conference table and various chair stool.The advantage of accent rope type device is easy to adjust, can be used for the drawer table and the operating desk of various higher class, and its bands adjuster can also be used for the bands length adjustment of other purposes.Slideway type device is more a little than transferring rope type device economy, can be used for dining table, desk, reading-desk and drawer table.Three kind of means can make up mutually.

Embodiment provides description taken in conjunction with the accompanying drawings.

Accompanying drawing the 1, the 2nd, two embodiment of cuff type device.

Accompanying drawing the 3, the 4th, two embodiment of slideway type device.

Accompanying drawing the 5, the 6th, two embodiment of accent rope type device.

Accompanying drawing 7～11st, the shifting axle (embodiment of 4a～4d).

Accompanying drawing 12,13,14 is respectively front view and two profiles of an embodiment-adjusting box of bands adjuster.

In the simple cuff type device shown in the accompanying drawing 1,2, the upper end of supporting leg (1a) and strut (2a) is contained in below the supported material with fixed axis (3a), that connect two supporting legs (1a) or supporting leg (1a) and strut (2a) is shifting axle (4a, 4b), its slider is the cuff that tight lock device is housed that is enclosed within on the supporting leg (1a), the structure of shifting axle is not shown among the figure, and they are painted in the accompanying drawing 7,8.(5) be connecting rod, it connects the supporting leg of both sides, keeps their lateral stability.

In the simple slideway type device shown in the accompanying drawing 3,4, the upper end of supporting leg (1b) and strut (2b) is connected with supported material with shifting axle (4c), slider is the slideway that is contained in below the supported material, tightly locks device pole (1b, 2b) upper end is linked together with slideway.The structure of shifting axle is not shown among the figure, and they are painted in the accompanying drawing 9,10.The upper end of supporting leg (1c) is fixed axis (3a), and that connect strut (2b) lower end and supporting leg (1c) is fixed axis (3c), and (5) are connecting rods, its end double as fixed axis (3b) in accompanying drawing 3.

The difference of simple accent rope type device shown in the accompanying drawing 5,6 and accompanying drawing 3,4 is that supporting leg (1b, 1c) lower end is equipped with the middle part of roller and slideway length direction the adjusting box (6) that can adjust bands length is housed, in accompanying drawing 6, regulate the part that box becomes supported material.Transfer the middle slider of shifting axle (4d) of rope type device similar to slideway type device, it tightly locks device is dual, and the structure of shifting axle is not shown among the figure, and they are painted in the accompanying

drawing

10,11.

In accompanying drawing 3～6, change fixed axis (3b, 3c) into shifting axle (4a, 4b) respectively, just become cuff type, slideway type and three kinds of devices of accent rope type embodiment of combination mutually, the adjusting range of these combination energy expansion instrument height.

Accompanying drawing 7 is sectional drawings of shifting axle (1a).Cuff (10a) is a slider, and its shape will be according to the supporting leg Section Design, and it can move along supporting leg (1a).Axle (9) is whole, or is made up of axis body (9a) and axle cap (9b) as shown in the figure, and it is installed in the hole on the cuff, and its thicker two ends sink in the groove on the cuff, with this a pair of cuff are linked together.Can establish packing ring (8) between the cuff so that two cuffs can relatively rotate neatly.Tight lock device is made up of bolt (11) and nut (12), between they and the cuff backing plate (7) can be set.

Accompanying drawing 8 is sectional drawings of shifting axle (4b).Cuff (10b) is a slider, it and pedestal (13) are fixed together with rivet (15), the lower end of strut (2a) is connected on the pedestal with axle (9), connecting rod (5) end pier slightly places cuff, packing ring (8), backing plate (7) and identical with accompanying drawing 7 as the bolt (11) of tight lock device and nut (12) etc.Here with accompanying drawing 2 some difference are arranged, connecting rod is not connected on the cuff in accompanying drawing 2, and the structure of cuff can also be more simpler like that, draws this difference in order to illustrate that it is feasible that link end is connected on the cuff.

Cuff in the accompanying drawing 7,8 (10a, 10b) processing is very convenient, they can make shape through a punching press postfovea with metallic plate, and it has at least one pair of hole and groove, and an opening is arranged, tight lock device is located at opening part, and it becomes cuff and can tighten up and loosen.

Drawn shifting axle (4c) and (4d) in the accompanying drawing 9～11, do not have the principle difference between them: accompanying drawing 9 is shifting axle (4c), roller (17) is contained in axle, and it to be moved on (9) convenient, just become accompanying drawing 10, in order to make its last pulley (24) that refills easy to adjust be used for transition bands (21), just become the shifting axle (4d) in the accompanying drawing 11, accompanying drawing 10 can be regarded as the shifting axle (4c) that roller (17) are housed, also can be regarded as and cancelled the shifting axle (4d) that subtracts power rope (21a) thereby do not adorn pulley (24), at this moment, the termination of adjusting rope (21b) can directly be fixed on pole (1b, 2b).Among these figure, slider is the guide plate (16) (it also can be guide groove, guide rod, guide rail etc.) that has slotted hole, slotted hole promptly is a slideway, tight lock device will adapt with slider, and here, it is by being through in the slideway and double as is that the screw rod (11) and the nut (12) of axle (9) formed, (8) be packing ring, bands (21) forms the second tight lock device in the shifting axle (4d), and at this moment nut (12) can loosen at ordinary times, tightens when device need be moved to avoid bands lax.In the accompanying drawing 11, pole (1b, 2b) upper end has breach, lays in the breach to be used for the pulley (24) of transition bands (21), and axle (19) is fixed on rod end with pulley and fixing card (18), and fixing card being fixed together with rivet (15) and axle bed (13).The fixed form of the axle (9) of roller (17) is variant slightly in the accompanying

drawing

11,12, and it is contained in the breach of pole (1b, 2b) upper end in accompanying drawing 10, and it is contained on the axle bed (13) that is fixed on pole (1b, 2b) upper end in accompanying drawing 11.

Accompanying

drawing

12,13,14 has been described the structure of regulating box.The different parts difference of bands (21) is for subtracting power rope (21a) and regulating rope (21b), and they are having the pulley (24) that links to locate mutual transition with roller.It is optional to subtract the power rope, can cancel when the device load-bearing is less, easy to adjust.Regulating the rustling sound end is fixed on the cheese (52).Have on the ratch limit cam (39) two with distance of shaft centers from different planes, available Archimedes spiral transition.Regulate a gear wheel (51) and the cheese (52) of box (6) by coaxial (50), a handwheel (49) of coaxial (40), a pinion (41) and a ratchet (48), a state control knob (31) of coaxial (30), a brake cam (38) and a ratch limit cam (39) and a shell (60), a ratch (37), a pair of brake bar (36), two springs (34,35) and at least one pulley (23) that is fitted together with axle (20) are formed.

Axle

30,40,50 is parallel to each other, axle 20 is with above-mentioned each is parallel or become a low-angle, shell (60) is their common support, pinion and gear wheel engagement, when ratch eases out and ratchet engaged, hold and close with axle (40) when brake bar tightens up, spring (34 and 35) is against respectively on ratch and the brake bar, brake cam (38) and ratch limit cam (39) are against the rear end of brake bar (36) and ratch (37) respectively, and ratch and brake bar are contained in respectively on the axle separately (32) and (33) that is fixed on the shell.

Regulate box and can realize two states, by handwheel (49) and state control knob (31) operation.Under a kind of state, brake cam (38) loosen the brake bar (36), spring (34) is freed braking with its top from hand wheel shaft (40), ratch limit cam (39) is gone up apart from the axle center nearer plane ratch (37) is unclamped, spring (35) ejects it with ratchet (48) engagement and reverses to prevent ratchet, at this moment rotate handwheel (49) along clockwise, pinion (41) drives gear wheel (51) and does the contra solem rotation, the cheese coaxial (52) with gear wheel will from the adjusting rope of left and right sides both direction respectively the contra solem and along clockwise around getting up, it is taken in after pulley (23) turns to symmetrically.Under another kind of state, upward plane far away ejects ratch (37) to ratch control cam (39) apart from the axle center, free ratchet (48), simultaneously brake cam (38) is held brake bar (36) with a firm grip to hand wheel shaft (40) braking, and both sides bands (21) can rely on the moment of torsion that self tension force produces or be aided with reversing handwheel (49) and ease out symmetrically.When treating that supported material drops to the height of expection, the state control knob pulled to rising get final product stop.

Claims

1, a kind of supporting arrangement of elevatable desk and chair, this device is a system of bars, pole is supporting leg or supporting leg and strut, their upper end is connected below the supported material, supporting leg tilts, and prop up in ground its lower end, and the lower end of strut is connected on the supporting leg, connection between supported material, supporting leg and the strut all realizes by axle, the invention is characterized in:

A. (1a～1c) and the length of strut (2a, 2b) are changeless to supporting leg;

B. (1a～1c) and the axle of strut (2a, 2b) are that ((4a～4d), each shifting axle is all combined formation by an axle (9) and a slider and at least one tight lock device to fixed axis for 3a～3c) or shifting axle to connect supported material, supporting leg;

C. in a complete supporting arrangement, can not comprise fixed axis, but include at least two shifting axles, they are installed between two supporting legs (1a) or supporting leg (1a) and the strut (2a), or be installed between pole (1b, 2b) and the supported material, or be installed in above-mentioned two positions simultaneously.

2, the bands adjuster, particularly manual bands adjuster, the invention is characterized in its a gear wheel (51) and cheese (52) by coaxial (50), a handwheel (49) of coaxial (40), a pinion (41) and a ratchet (48), a state control knob (31) of coaxial (30), a brake cam (38) and a ratch limit cam (39) and a shell (60), a ratch (37), a pair of brake bar (36), two springs (34,35) and at least one pulley (23) that is fitted together with axle (20) form.Axle 30,40,50 is parallel to each other, axle 20 is with above-mentioned each is parallel or become a low-angle, shell (60) is their common support, pinion and gear wheel engagement, when ratch eases out and ratchet engaged, hold and close with axle (40) when brake bar tightens up, spring (34 and 35) is against respectively on ratch and the brake bar, brake cam (38) and ratch limit cam (39) are against the rear end of brake bar (36) and ratch (37) respectively, and ratch and brake bar are contained in respectively on the axle separately (32) and (33) that is fixed on the shell.

3, supporting arrangement as claimed in claim 1, it is characterized in that, the axle that connects two supporting legs (1a) or supporting leg (1a) and strut (2a) is shifting axle (4a, 4b), and slider is the cuff that locking device is housed (10a, 10b) that is enclosed within on the supporting leg (1a).

4, supporting arrangement as claimed in claim 1, the axle that it is characterized in that connecting pole (1b, 2b) and supported material is shifting axle (4c, 4d), slider is the slideway that is contained in below the supported material, be installed in pole (1b, 2b) upper end and with axle (9) that slideway links together be a part of tightly locking device.

5, supporting arrangement as claimed in claim 4, it is characterized in that in the middle part of the slideway bands adjuster (6) being housed, roller (17) is equipped with in pole (1b, 2b) upper end, roller also is equipped with in the lower end of supporting leg (1b, 1c), the bands (21) that bears pulling force connects roller and bands adjuster, and it constitutes the second tight lock device.

6, supporting arrangement as claimed in claim 3, it is characterized in that in the shifting axle (4a), axle (9) is whole or is made up of axis body (9a) and axle cap (9b), it is installed in the hole on the cuff (10a), its thicker two ends sink in the groove on the cuff, tightly lock device and are made up of bolt (11) and nut (12).

7, supporting arrangement as claimed in claim 3, it is characterized in that in the shifting axle (4b), cuff (10b) is fixed together with rivet (15) with pedestal (13), and the lower end of strut (2a) is connected on the pedestal with axle (9), tightly locks device and is made up of bolt (11) and nut (12).

8, as claim 3,6,7 described supporting arrangements, it is characterized in that having at least one pair of hole and groove on the cuff (10a, 10b), and an opening is arranged, tightly lock device and be located at opening part.

9, as claim 3,4 described supporting arrangements, it is characterized in that slider is the guide plate (16) that has slotted hole in the shifting axle (4c, 4d), slotted hole promptly is a slideway, tightly locks device by being through in the slideway and double as is that the screw rod (11) and the nut (12) of axle (9) formed.

10, as claim 4,5 described supporting arrangements, the axle (9) that it is characterized in that roller (17) is to be contained in the breach of pole (1b, 2b) upper end or to be contained on the axle bed (13) that is fixed on pole (1b, 2b) upper end.