CN106913104A - A kind of foot pedal apparatus of hold-fast body and chair tool - Google Patents
A kind of foot pedal apparatus of hold-fast body and chair tool Download PDFInfo
- Publication number
- CN106913104A CN106913104A CN201511034324.8A CN201511034324A CN106913104A CN 106913104 A CN106913104 A CN 106913104A CN 201511034324 A CN201511034324 A CN 201511034324A CN 106913104 A CN106913104 A CN 106913104A
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- China
- Prior art keywords
- briquetting
- inner sleeve
- outer tube
- sleeve
- hold
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/50—Supports for the feet or the legs coupled to fixed parts of the chair
- A47C7/506—Supports for the feet or the legs coupled to fixed parts of the chair of adjustable type
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
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- Chairs Characterized By Structure (AREA)
Abstract
The invention discloses a kind of hold-fast body and the foot pedal apparatus of chair tool, the hold-fast body includes main shaft, inner sleeve and outer tube；Inner sleeve upper end is provided with multiple grooves, form multiple circumferentially distributed fins, groove is respectively provided on two sides with each fin outer surface, briquetting is provided with groove, briquetting is respectively arranged on the left side and the right side card base, card base is arranged in groove, and the inner surface of briquetting is inlaid with sheet rubber, and the outer surface of briquetting has the gradient；Outer tube has the inclined-plane endoporus being engaged with the briquetting outer surface gradient, inner sleeve upper end is plugged in the endoporus of outer tube, and when inner sleeve is moved up or outer tube is moved down, outer tube can extrude briquetting, and then briquetting is inwardly oppressed sheet rubber, it is brought into close contact on main shaft.Briquetting of the invention is not to be rooted in inner sleeve, its activity more freely, when inclined-plane coordinates whole briquetting and sheet rubber be forced to be forced to it is parallel moved to center, such briquetting and the upper and lower enclasping force of sheet rubber are uniform.
Description
Technical field
The present invention relates to swivel chair, office chair technical field, the foot pedal apparatus of more particularly to a kind of hold-fast body and chair tool.
Background technology
Existing chair tool, especially children's chairs, generally circular foot-operated with one, the circle is foot-operated to pass through support and center
Pipe is connected, and center sleeve is fixed with the holding of gas bar (also referred to as main shaft), is in design using the single point side of being fixed
Formula, i.e., be engaged using center sleeve with c-type sleeve pipe, and a screwed hole is opened up on center sleeve, and the knob with screw rod is inserted
Enter screwed hole, and gradually screw, c-type sleeve pipe is extruded when knob is screwed, compel to be secured on gas bar, this fixed form is not only
It is more complicated and laborious on rotational lock, and has as a drawback that：C-type sleeve pipe uses elastomeric material, and only adopts
Gas bar can just be tightened with the design of quality of rubber materials, when knob compresses c-type sleeve pipe, the surface of c-type sleeve pipe can be caused to damage
It is bad, can lose tighten function after a long time use；Furthermore, gas bar more can be indirectly oppressed, so as to cause the deformation of gas bar, and then
Have influence on the round elevating function for stepping on ring；What is more, circular foot-operated generation with support is inclined and is rocked, exist when using
It is dangerous.
United States Patent (USP) " US4948149 " discloses a kind of net post of net, and the net post is made up of the socket of hollow pipe 11,12,
Hollow pipe 11 can be elongated or shunk to adjust whole height, and set a holding in two connecting portions of hollow pipe 11,12
Mechanism, the hold-fast body includes a linear exemplary pressure components 21 and outer sleeve 22, and linear exemplary pressure components 21 are provided with multiple grooves and are formed
The pressing plate 213 that multiple is spaced apart, this pressing plate 213 can produce elastic deformation, linear exemplary pressure components 21 to connect with the screw thread of outer sleeve 22
Connect and both inclined-planes coordinate, after height is regulated, outer sleeve 22 screws its inner surface and can oppress pressing plate 213, and then makes
Pressing plate 213 oppresses hollow pipe 11, the purpose of holding is reached, so that hollow pipe 11,12 positions are relatively fixed.
Above-mentioned hold-fast body can also be applied to the foot pedal apparatus of chair, it is compressed mode from single point and is changed into circumferential holding
Mode, but compared with hollow pipe for, foot pedal apparatus due to directly accept people foot and leg, it is evident that the weight that it bears will again
Many, along with gas bar is smooth, not enough, foot pedal apparatus can drop the frictional force between pressing plate 213 and gas bar, thus up to not
To test and the requirement for using；Consideration installs sheet rubber additional to increase frictional force in pressing plate inner surface, but effect is still not satisfactory, former
Fixed because being that one end of pressing plate is grown on online sexual oppression element, the other end of pressing plate is free end, when with overcoat
During cylinder inclined-plane compression fit, pressing plate deforms up and down can be different, i.e. free end deformation can be bigger than fixing end, causes the holding of fixing end
Power is smaller than free end, and enclasping force is uneven up and down, and holding effect is not good enough, is not very stable when using.
The content of the invention
Instant invention overcomes the deficiency in the presence of above-mentioned prior art, there is provided a kind of enclasping force is uniform up and down, can make
Hold-fast body and the foot pedal apparatus of chair tool that sheet rubber is brought into close contact up and down, the hold-fast body is ingenious to make use of this part of groove
Space, by setting the movable briquetting with sheet rubber in groove, the briquetting tangles inner sleeve, briquetting by the card base of both sides
Thickness and card base, the position of groove can flexibly set according to actual needs, be not to be rooted in inner sleeve because of briquetting, its activity
Degree is high, and when inclined-plane coordinates, whole briquetting and sheet rubber are that mode is integrally parallel to be moved to center to be forced to by force, and then
Main shaft is adjacent to, briquetting and the upper and lower enclasping force of sheet rubber are uniform, hold effect tightly more preferably, and holding has greatly been played in actual use
Effect, allows foot pedal apparatus firmly to hold gas bar tightly.
The technical proposal of the invention is realized in this way：
A kind of hold-fast body, including main shaft, inner sleeve and outer tube；Inner sleeve upper end is provided with multiple grooves, forms many
Individual circumferentially distributed fin, groove is respectively provided on two sides with each fin outer surface, and briquetting, a left side for briquetting are provided with groove
The right side is respectively provided on two sides with card base, and described card base is arranged in groove, and the inner surface of briquetting is inlaid with sheet rubber, the appearance of briquetting
Face has the gradient；Described outer tube has the bevelled endoporus of band being engaged with the briquetting outer surface gradient, inner sleeve upper end
It is plugged in the endoporus of outer tube, when inner sleeve is moved up or outer tube is moved down, the outer tube meeting with inclined-plane endoporus
Extruding briquetting, and then briquetting is inwardly oppressed sheet rubber, it is brought into close contact on main shaft, reach the purpose for holding fixation tightly.
Preferably, being symmetrically arranged on two with two grooves in each fin outer surface, the left and right sides of briquetting symmetrically sets
There are two card bases, described card base is formed in one with briquetting.Briquetting passes through the groove fit of card base and fin, in axial direction
On tangle inner sleeve, make briquetting compress main shaft when in the axial direction synchronously fix inner sleeve.
Preferably, the width of sheet rubber is equal to the width of groove.
Preferably, width of the width of sheet rubber more than groove, both sides and the fin of groove both sides of sheet rubber interlock
Set.This kind of mode may be such that briquetting inner side is stuck on fin by sheet rubber two ends, and be stuck in by card base on the outside of briquetting recessed
In groove, the purpose being fixed in groove is reached, be not easy to come off in assembling, it is very convenient.
For the inclined-plane inner hole being more convenient for outer tube, preferably, the outer surface of fin is with the gradient.
Briquetting can produce deformation when being pressurized, in order that card base stretches enough spaces, preferably, the width of groove
More than the width of card base.
For the ease of installing sheet rubber, and make its it is more stable be fixed on briquetting, preferably, being provided with fixed on briquetting
Position hole, is provided with locating dowel on sheet rubber, described locating dowel be inserted in location hole and with location hole interference fit.
For reduces cost, mitigate weight, preferably, inner sleeve is plastics with outer tube being made.
Furtherly, the invention provides a kind of foot pedal apparatus of chair tool, including circle steps on ring, support, center sleeve
And hold-fast body as described above, described center sleeve in cylinder, the endoporus of center sleeve diameter phase everywhere from top to bottom
Together, outer tube is arranged in center sleeve and is connected with center sleeve axial restraint, and center sleeve lower end is provided with internal thread, inner sleeve
Pipe lower end is provided with external screw thread, and inner sleeve is inserted upwardly into center sleeve and is threadedly coupled with center sleeve；Inner sleeve rotation is upward
When the rotation of mobile or center sleeve is moved down, the outer tube with inclined-plane endoporus can extrude briquetting, and then make briquetting inside
Compressing sheet rubber, makes it be brought into close contact on main shaft, reaches the purpose for holding fixation tightly.
Preferably, outer tube is connected with center sleeve axial restraint referring to：Center sleeve upper end is provided with in-flanges, overcoat
Pipe upper end is provided with multiple elastic card claws for turning up, and, along being against on the lower surface of in-flanges, elastic card claw is then for the pipe of outer sleeve upper
Catch on the upper surface of in-flanges.
Preferably, inner sleeve bottom is formed with and screws handle.
Employing the design concept of the invention and beneficial effect of above-mentioned technical proposal is：
Present invention employs the circumferential mode for holding inner sleeve tightly, it may also be said to be mode that whole ring surface is averagely compressed,
Compressed rather than using single point, therefore inner sleeve and main shaft can't be caused to damage, can also extend its service life, while
The round steadiness for stepping on ring is increased again, will not run-off the straight or the phenomenon rocked.
Importantly, the present invention is ingenious to make use of groove this portion void, set with sheet rubber by groove
Movable briquetting, the briquetting tangles inner sleeve by the card base of both sides, and the thickness and card base of briquetting, the position of groove can basis
Be actually needed flexibly setting, be not to be rooted in inner sleeve because of briquetting, its activity more freely, when inclined-plane coordinates whole briquetting and
Sheet rubber be forced to be forced to it is parallel moved to center, parallel movement refers to that briquetting is moved up and down apart from identical, so pressure
Block and the upper and lower enclasping force of sheet rubber are uniform, hold effect tightly more preferably, and holding effect has greatly been played in actual use, make to ride
Device can firmly hold main shaft tightly.
Furtherly, support includes multiple connecting rods, and one end and the circle of connecting rod are stepped on ring and be connected by bolt, connecting rod it is another
End is welded and fixed with center sleeve, and when being welded and fixed, easily makes the generation deformation of center sleeve inside, if by inclined-plane endoporus
It is set directly on center sleeve, its precision can be influenceed, is impacted to taper fit；The present invention is by center sleeve and band
The outer tube of inclined-plane endoporus is provided separately, and center sleeve plays the circular effect for stepping on ring that is connected, and outer tube is played and inner sleeve
The effect that pipe inclined-plane coordinates, Each performs its own functions, it is to avoid coordinates not smooth showing due to be deformed when center sleeve weld bringing
As.
Further say, the sheet rubber on briquetting is staggered with the fin of groove both sides residing for briquetting, this kind of mode can
So that briquetting inner side is stuck on fin by sheet rubber two ends, and briquetting outside is stuck in groove by card base, has reached fixation
Purpose in groove, is not easy to come off in assembling, very convenient.
Using structure design of the invention, the outer surface of fin can have the gradient, it is also possible to without the gradient, when there is the gradient its
Can jointly be played a role with briquetting and embrace main shaft；And when without slope design, what it was played is the effect for tangling briquetting.
Inner sleeve bottom of the invention is formed with and screws handle, facilitates staff to operate, and in operation, can step on ring not with circle
It is dynamic, rotate inner sleeve；Can also inner sleeve it is motionless, rotation circle step on ring；It is very convenient, for different crowds provides two kinds not
Same operation selection, fully meets the operation needs of various crowds.
Brief description of the drawings
Fig. 1 is the structural representation of inner sleeve of the present invention；
Fig. 2 is inner sleeve of the present invention and single briquetting, the fractionation structural representation of sheet rubber；
Fig. 3 is the fractionation structural representation of briquetting and sheet rubber；
Fig. 4 is inner sleeve and briquetting, the installation diagram of sheet rubber；
Fig. 5 is inner sleeve and briquetting, the explosive view of sheet rubber；
Fig. 6 is the mated condition schematic diagram of hold-fast body of the present invention；
Fig. 7 is schematic diagram of the foot pedal apparatus of the present invention when in releasing orientation；
Fig. 8 is schematic diagram of the foot pedal apparatus of the present invention when in tightening state；
Fig. 9 is the fit structure schematic diagram of outer tube and center sleeve；
Figure 10 is the circular fit structure schematic diagram for stepping on ring, support, center sleeve and outer tube；
Figure 11 is the explosive view of foot pedal apparatus of the present invention.
Specific embodiment
Specific embodiment of the invention is as follows：
Embodiment：Orientation is defined first, and the narration on direction of the invention is installed based on hold-fast body and foot pedal apparatus
In normal operating condition description in chair tool, inner sleeve is in outer tube lower end and both are plugged in together.
A kind of hold-fast body, as shown in figs. 1 to 6, including main shaft 1, inner sleeve 2 and outer tube 3, when chair tool is applied to,
Main shaft 1 be also referred to as gas bar, it is interior be outward that comparatively, in the present invention, inner sleeve is not to be set in outer tube completely, only
Only it is that inner sleeve upper end is inserted in outer tube；Inner sleeve 2 is nylon material and is made with outer tube 3, and the upper end of inner sleeve 2 is provided with
The grooves 4 that in axial direction set of multiple, form it is multiple it is circumferentially distributed produce elastically-deformable fin 5, in each wing
The left and right sides of the outer surface of piece 5 is arranged with two essentially square grooves 6, and briquetting 7, a left side for briquetting 7 are provided with groove 4
The right side is symmetrically arranged on two with two card bases 8, and card base 8 is formed in one with briquetting 7, and described card base 8 is arranged in groove 6, in water
Square upwards, more than the width of card base 8, in order to briquetting 7, in compressive deformation, card base 8 can be stretched to both sides for the width of groove 6
Exhibition；The inner surface of briquetting 7 is inlaid with sheet rubber 9, and the outer surface of briquetting 7 has the gradient 22；Described outer tube 3 has and briquetting
The endoporus 11 with inclined-plane 10 that the 7 outer surface gradients 22 are engaged, the upper end of inner sleeve 2 be plugged in the endoporus 11 of outer tube and with
Inclined-plane 10 coordinates, and when inner sleeve 2 is moved up or outer tube 3 is moved down, the outer tube 3 with inclined-plane endoporus can extrude briquetting
7, and then make the inwardly compressing sheet rubber 9 of briquetting 7, it is brought into close contact on main shaft 1, reach the purpose for holding fixation tightly.
Specifically, as shown in figure 4, the width of sheet rubber 9 is more than the width of groove 4, both sides and the groove 4 of sheet rubber 9
The fin 5 of both sides is staggered；Location hole 12 is provided with briquetting 7, locating dowel 13, described positioning are provided with sheet rubber 9
Post 13 be inserted in location hole 12 and with the interference fit of location hole 12.
A kind of foot pedal apparatus of chair tool, as shown in Fig. 7~11, including circle steps on ring 13, support 14, center sleeve 15 and such as
Upper described hold-fast body, support 14 is made up of multiple connecting rods 23, and one end and the circle of connecting rod 23 are stepped on ring 13 and be connected by bolt,
The other end of connecting rod 23 is welded and fixed with center sleeve 15, and described center sleeve 15 is in cylinder, from top to bottom center sleeve
Diameter is identical everywhere for 15 endoporus, and outer tube 3 is arranged at the top of center sleeve 15 and is connected with the axial restraint of center sleeve 15, in
The lower end of heart sleeve pipe 15 is provided with internal thread 16, and the lower end of inner sleeve 2 is provided with external screw thread 17, and inner sleeve 2 is inserted upwardly into center sleeve 15
And be threadedly coupled with center sleeve 15；The bottom of inner sleeve 2 is formed with and screws handle 18.
Wherein, as shown in Fig. 9,10, outer tube 3 is connected with the axial restraint of center sleeve 15 and refers to：The upper end of center sleeve 15
In-flanges 19 is provided with, the upper end of outer tube 3 is provided with multiple elastic card claws 20 for turning up, and the pipe of the upper end of outer tube 3 is against varus along 21
On the lower surface on side 19, elastic card claw 20 then catches on the upper surface of in-flanges 19, with this upper end of outer tube 3 and center sleeve 15
In-flanges 19 is connected and fixed, without departing from center sleeve 15.
During concrete application, as shown in figure 8, circle is stepped on, ring 13 is motionless, and the rotation of inner sleeve 2 is moved up, with inclined-plane endoporus
11 outer tube 3 can extrude briquetting 7, and then make the inwardly compressing sheet rubber 9 of briquetting 7, it is brought into close contact on main shaft 1, reach
To hold tightly fixation purpose, because briquetting 7 tangles inner sleeve 2 by card base 8, at the same inner sleeve 2 and with the screw thread of center sleeve 15
Connection, so that circle steps on ring 13 is integrally attached to a certain position of main shaft 1 with center sleeve 15；Conversely, as shown in fig. 7, working as
Need adjustment circle when stepping on the height of ring 13, opposite direction screws inner sleeve 2, under inner sleeve 2 is driven briquetting 7, the entirety of sheet rubber 9
Move, progressively disengage the inclined-plane endoporus 11 of outer tube 3, the inclined-plane of endoporus 11 is no longer played its contention effect, briquetting 7, sheet rubber 9
Reset, no longer hold main shaft 1 tightly, can now adjust the circular height for stepping on ring 13.
Claims (11)
1. a kind of hold-fast body, it is characterized in that：Including main shaft, inner sleeve and outer tube；Inner sleeve upper end is provided with multiple grooves, shape
Into multiple circumferentially distributed fins, groove is respectively provided on two sides with each fin outer surface, briquetting is provided with groove, pressed
Block is respectively arranged on the left side and the right side card base, and described card base is arranged in groove, the inner surface of briquetting is inlaid with sheet rubber, briquetting
Outer surface there is the gradient；Described outer tube has the bevelled endoporus of band being engaged with the briquetting outer surface gradient, inner sleeve
Pipe upper end is plugged in the endoporus of outer tube, outer with inclined-plane endoporus when inner sleeve is moved up or outer tube is moved down
Sleeve pipe can extrude briquetting, and then briquetting is inwardly oppressed sheet rubber, it is brought into close contact on main shaft, reach holding and fix it
Purpose.
2. a kind of hold-fast body according to claim 1, it is characterised in that：Symmetrically set in the both sides of each fin outer surface
The left and right sides for having two grooves, briquetting is arranged with two card bases, and described card base is formed in one with briquetting.
3. a kind of hold-fast body according to claim 1, it is characterised in that：The width of sheet rubber is equal to the width of groove.
4. a kind of hold-fast body according to claim 1, it is characterised in that：The width of sheet rubber is more than the width of groove,
The both sides of sheet rubber are staggered with the fin of groove both sides.
5. a kind of hold-fast body according to claim 1, it is characterised in that：The outer surface of fin is with the gradient.
6. a kind of hold-fast body according to claim 1, it is characterised in that：Width of the width of groove more than card base.
7. a kind of hold-fast body according to claim 1, it is characterised in that：Location hole is provided with briquetting, in sheet rubber
Be provided with locating dowel, described locating dowel be inserted in location hole and with location hole interference fit.
8. a kind of hold-fast body according to claim 1, it is characterised in that：Inner sleeve is plastics and is made with outer tube.
9. a kind of foot pedal apparatus of chair tool, it is characterized in that step on ring including circle, support, center sleeve and such as claim 1~8 times
Hold-fast body described in one, in cylinder, diameter is identical everywhere for the endoporus of center sleeve from top to bottom for described center sleeve,
Outer tube is arranged in center sleeve and is connected with center sleeve axial restraint, and center sleeve lower end is provided with internal thread, inner sleeve
Lower end is provided with external screw thread, and inner sleeve is inserted upwardly into center sleeve and is threadedly coupled with center sleeve；Inner sleeve rotation is moved upwards
When the rotation of dynamic or center sleeve is moved down, the outer tube with inclined-plane endoporus can extrude briquetting, and then make briquetting to internal pressure
Compel sheet rubber, it is brought into close contact on main shaft, reach the purpose for holding fixation tightly.
10. foot pedal apparatus of chair tool according to claim 9, it is characterised in that：Outer tube and center sleeve axial restraint
Connection refers to：Center sleeve upper end is provided with in-flanges, and outer sleeve upper is provided with multiple elastic card claws for turning up, outer sleeve upper
Along being against on the lower surface of in-flanges, elastic card claw then catches on the upper surface of in-flanges to pipe.
The foot pedal apparatus of 11. chair tools according to claim 9, it is characterised in that：Inner sleeve bottom is formed with and screws handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511034324.8A CN106913104B (en) | 2015-12-26 | 2015-12-26 | Pedal device of enclasping mechanism and chair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511034324.8A CN106913104B (en) | 2015-12-26 | 2015-12-26 | Pedal device of enclasping mechanism and chair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106913104A true CN106913104A (en) | 2017-07-04 |
| CN106913104B CN106913104B (en) | 2023-07-25 |
Family
ID=59456302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511034324.8A Active CN106913104B (en) | 2015-12-26 | 2015-12-26 | Pedal device of enclasping mechanism and chair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106913104B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110897407A (en) * | 2019-10-10 | 2020-03-24 | 东莞濠文塑胶五金制品有限公司 | Pedal ring height adjusting and locking mechanism |
| IT202000014356A1 (en) * | 2020-06-16 | 2021-12-16 | Donati Spa | HEIGHT-ADJUSTABLE FOOTRESTS FOR A CHAIR, AN ARMCHAIR OR A STOOL |
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| JP3159215U (en) * | 2010-02-19 | 2010-05-13 | 蔡 博全 | Lifting structure of chair tread ring |
| TWM403956U (en) * | 2010-10-01 | 2011-05-21 | Young Mind Co Ltd | A chair with easy-to-install footrest ring |
| US20130207440A1 (en) * | 2012-02-14 | 2013-08-15 | Sam Linhoff | Articulating footrest |
| JP3178717U (en) * | 2012-07-14 | 2012-09-27 | 蔡博全 | Swivel chair tread ring structure |
| CN202820418U (en) * | 2012-08-27 | 2013-03-27 | 蔡博全 | Treading ring structure of rotating seat |
| US20140077575A1 (en) * | 2012-09-14 | 2014-03-20 | Kun-Yu Hsieh | Constricting member of chair footrest ring |
| CN103767380A (en) * | 2012-10-23 | 2014-05-07 | 东莞市兴实诚五金制品有限公司 | Seat footrest ring |
| US20140265512A1 (en) * | 2013-03-14 | 2014-09-18 | Leggett & Platt Canada Co. | Height adjustment mechanism suitable for a footring |
| KR20150040549A (en) * | 2013-10-07 | 2015-04-15 | 김선환 | Mounting structure of central shaft for chair |
| CN204378531U (en) * | 2014-07-22 | 2015-06-10 | 谢坤祐 | Tightening structure for pedal ring of chair |
| CN104891007A (en) * | 2015-05-18 | 2015-09-09 | 佛山市南海利达印刷包装有限公司 | Splicing bottle cap |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110897407A (en) * | 2019-10-10 | 2020-03-24 | 东莞濠文塑胶五金制品有限公司 | Pedal ring height adjusting and locking mechanism |
| IT202000014356A1 (en) * | 2020-06-16 | 2021-12-16 | Donati Spa | HEIGHT-ADJUSTABLE FOOTRESTS FOR A CHAIR, AN ARMCHAIR OR A STOOL |
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| CN106913104B (en) | 2023-07-25 |
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