EP1097660A1 - A sliding blocking device for varying and regulating the position of chair structures and/or their parts - Google Patents
A sliding blocking device for varying and regulating the position of chair structures and/or their parts Download PDFInfo
- Publication number
- EP1097660A1 EP1097660A1 EP99830689A EP99830689A EP1097660A1 EP 1097660 A1 EP1097660 A1 EP 1097660A1 EP 99830689 A EP99830689 A EP 99830689A EP 99830689 A EP99830689 A EP 99830689A EP 1097660 A1 EP1097660 A1 EP 1097660A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- rod
- blocking
- blocking position
- runner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
- A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
- A47C1/027—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of clamps or friction locking members
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/0325—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of clamps or friction locking members
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
Definitions
- This invention concerns, in general, seating structures like office chairs and armchairs, car seats, or any others requiring regulation and, in particular, concerns a device for choosing and stabilising the user positions of such chairs and/or their parts.
- Such a device allows a gradual regulation, that is, not in steps, of the angle between the two elements connected by a joint, such as the seat and back of a chair, thanks to the use, as a positioning element, of a smooth shaft and, as a blocking element, of a plate that acts upon said shaft.
- the aim, however, of the present invention is to improve such a sliding blocking device and make it suitable and specifically applicable to oscillating and synchronised chairs, with the dual function of being able to vary the inclination of the seat and back freely at will, with no obligatory positions and, at the same time, preventing the back from moving suddenly and violently towards the chair occupant, hitting the person's back, every time it is unblocked to adjust the position.
- the proposed blocking device 10 is applied to an oscillating group for office chairs, which includes: a fixed body 11, to be applied to the top of an extendable upright support - not represented - and intended to carry the seat; an oscillating support 12, hinged to said body 11 with an oscillating cross shaft 13 and intended to carry a back with an adjustable angle to the seat; and an adjustable spring between the fixed body 11 and the oscillating support 12.
- the blocking device 10 includes a cylindrical rod 15 and two gripping plates 16,17.
- the rod 15 is connected, at the back, to the oscillating support 12 by means of a cross pin 18, parallel to the oscillating shaft 13 and passing through holes 19, located in the fixed body 11.
- the rod 15 extends from the back to the front under the seat, inside the body 11.
- Said rod 15 has the front end held in a block 20, fixed to the body 11, and may have a smooth surface or, preferably, a knurled or rough one.
- the two gripping plates 16,17 are positioned at right angles to the rod 15, each with a foot 16',17', forming a fulcrum with the body 11. Both the plates 16,17 have a cross-hole 16",17" and the rod 15 passes through said holes.
- the plates 16,17 can be moved between an orthogonal non-blocking position and a blocking position sloped with respect to the rod 15. In the orthogonal non-blocking position, the axis of the holes in the plates coincides with the rod axis, so that the latter may pass through said holes, relatively to the plates. In the sloped blocking position, the edge of the hole on each plate interacts with the external surface of the rod, with a gripping action that prevents the axial movements of the rod itself.
- the plates 16,17 have a fulcrum for oscillating between the orthogonal and sloped positions, the first in the opposite direction to the second and in such a way that they both act upon, and block, the rod - one against the axial movements of the rod in one direction and the other against the movements in the other direction.
- the plates 16,17 are normally kept in their sloped blocking position by an elastic system 22 and can be moved into their non-blocking position by means of a command lever 23 with the help of a runner 24 that slides relatively to the rod 15.
- Said lever is designed for a dual function: to control the height regulation of the support upright of the chair; to command the blocking/un-blocking device by means of the runner 24.
- This runner 24 is situated in a position between the pin 18 of the rod 15 and the plates 16,17, and can move from a backward blocking position, near said pin, to a forward non-blocking position, near said plate.
- the command lever 23 passes, from the outside, through a hole 25 made in one side of the fixed body 11, extending through a ring hole 26 set in a dividing wall 27 fixed to said body 11 and with its end using the runner 24.
- the lever 23 has an arm 28, designed to control the height regulation of the support upright and forming, with one of its parts, a shoulder 28' designed to interact with a blocking tooth 29 when the lever is in the non-blocking position of the device 10.
- the command lever 23 can move forward axially, towards the runner 24, according to the arrow A (Fig. 1), and backwards according to arrow B, as well as make angular movements, according to arrow C, with its fulcrum in the hole 25 in the side of the body 11, and rotational movements according to arrow D.
- the axial and angular movements are intended to control the runner, while the rotation is intended to control the support upright.
- the elastic system 22 which keeps the gripping plates in the blocking position includes a first spring 30, placed between the two plates 16,17, on a small guiding rod 31.
- This small rod 31 is fastened at one end to the first plate 16, the one which is furthest from the runner, and passes freely through corresponding holes made in the other plate 17 and in the runner 24.
- the spring 30 is mounted with a certain tension in such a way as to keep the plates 16,17 apart and in a position to interact with the rod 15.
- the system 22 includes, furthermore, a second spring 32, positioned in the runner 24 and in line with a pusher 33 which extends forwards across the plates without impediment until it comes to rest against a part of the horizontally pivoted lever 34, which has its fulcrum in 34' at the guiding block 20 of the rod 15, with its other side partly resting against the small rod 31 fixed to the plate 16 and carrying the first spring 30.
- the first spring 30 keeps the plates 16,17 apart, at an angle with respect to the rod 15, and, therefore, in the position to interact with the rod and to block the back support 12, with respect to the seat bearing body.
Abstract
Description
- This invention concerns, in general, seating structures like office chairs and armchairs, car seats, or any others requiring regulation and, in particular, concerns a device for choosing and stabilising the user positions of such chairs and/or their parts.
- Existing devices for stabilising the user's position, for example in chairs with adjustable seat and back, generally use toothed blocking elements. These, however, permit blocking only in a limited, pre-determined number of positions, depending on the number of teeth in the blocking element, which, for obvious reasons of space and resistance cannot exceed a certain limit nor be too thick or too thin.
- On the other hand, in order to give a choice of positions between two adjustable elements, a blocking device has already been proposed and was the subject of the patent requests RM/97/A/000099 and RM/97/A/000263 made by the same patentee.
- Such a device allows a gradual regulation, that is, not in steps, of the angle between the two elements connected by a joint, such as the seat and back of a chair, thanks to the use, as a positioning element, of a smooth shaft and, as a blocking element, of a plate that acts upon said shaft.
- The aim, however, of the present invention is to improve such a sliding blocking device and make it suitable and specifically applicable to oscillating and synchronised chairs, with the dual function of being able to vary the inclination of the seat and back freely at will, with no obligatory positions and, at the same time, preventing the back from moving suddenly and violently towards the chair occupant, hitting the person's back, every time it is unblocked to adjust the position.
- This objective is reached, according to the invention, by using a sliding blocking device for chairs with adjustable seat and back, in conformity with claim 1.
- Further details of the invention will become more evident from the description below, made with reference to the enclosed drawings, which are indicative but not binding, in which:
- Fig 1 shows a view from below of a support group for an oscillating chair that incorporates the device of the invention, in non-blocking position;
- Fig 2 shows a cross-section of the device in the non-blocking position, according to the line II-II in Fig. 1; and
- Fig. 3 shows a similar cross-section to that of Fig. 2, but with the device in the blocking position.
-
- In the illustrated example, the proposed
blocking device 10 is applied to an oscillating group for office chairs, which includes: afixed body 11, to be applied to the top of an extendable upright support - not represented - and intended to carry the seat; anoscillating support 12, hinged to saidbody 11 with anoscillating cross shaft 13 and intended to carry a back with an adjustable angle to the seat; and an adjustable spring between thefixed body 11 and theoscillating support 12. - The
blocking device 10 includes acylindrical rod 15 and twogripping plates rod 15 is connected, at the back, to theoscillating support 12 by means of across pin 18, parallel to the oscillatingshaft 13 and passing throughholes 19, located in thefixed body 11. Therod 15 extends from the back to the front under the seat, inside thebody 11. Saidrod 15 has the front end held in ablock 20, fixed to thebody 11, and may have a smooth surface or, preferably, a knurled or rough one. - The two
gripping plates rod 15, each with a foot 16',17', forming a fulcrum with thebody 11. Both theplates cross-hole 16",17" and therod 15 passes through said holes. Theplates rod 15. In the orthogonal non-blocking position, the axis of the holes in the plates coincides with the rod axis, so that the latter may pass through said holes, relatively to the plates. In the sloped blocking position, the edge of the hole on each plate interacts with the external surface of the rod, with a gripping action that prevents the axial movements of the rod itself. - It should be noted that the
plates - The
plates elastic system 22 and can be moved into their non-blocking position by means of acommand lever 23 with the help of arunner 24 that slides relatively to therod 15. - Said lever is designed for a dual function: to control the height regulation of the support upright of the chair; to command the blocking/un-blocking device by means of the
runner 24. Thisrunner 24 is situated in a position between thepin 18 of therod 15 and theplates - The command lever 23 passes, from the outside, through a
hole 25 made in one side of thefixed body 11, extending through aring hole 26 set in a dividing wall 27 fixed to saidbody 11 and with its end using therunner 24. - In one of its intermediate zones, the
lever 23 has anarm 28, designed to control the height regulation of the support upright and forming, with one of its parts, a shoulder 28' designed to interact with a blockingtooth 29 when the lever is in the non-blocking position of thedevice 10. - In order to function properly, the
command lever 23 can move forward axially, towards therunner 24, according to the arrow A (Fig. 1), and backwards according to arrow B, as well as make angular movements, according to arrow C, with its fulcrum in thehole 25 in the side of thebody 11, and rotational movements according to arrow D. The axial and angular movements are intended to control the runner, while the rotation is intended to control the support upright. - The
elastic system 22 which keeps the gripping plates in the blocking position includes afirst spring 30, placed between the twoplates rod 31. - This
small rod 31 is fastened at one end to thefirst plate 16, the one which is furthest from the runner, and passes freely through corresponding holes made in theother plate 17 and in therunner 24. Thespring 30 is mounted with a certain tension in such a way as to keep theplates rod 15. - The
system 22 includes, furthermore, asecond spring 32, positioned in therunner 24 and in line with a pusher 33 which extends forwards across the plates without impediment until it comes to rest against a part of the horizontallypivoted lever 34, which has its fulcrum in 34' at theguiding block 20 of therod 15, with its other side partly resting against thesmall rod 31 fixed to theplate 16 and carrying thefirst spring 30. - Essentially, when the
runner 24 is in the backward position as in Fig. 3, thefirst spring 30 keeps theplates rod 15, and, therefore, in the position to interact with the rod and to block theback support 12, with respect to the seat bearing body. - To modify such a blocking situation it is necessary to move the
command lever 23 deliberately, with an angular movement (arrow C) in such a way as to move therunner 24 from the backward to the forward position (Figs 1 and 2). This means that from one side the horizontallyhinged lever 34 is moved by the pusher 33, which is activated by thespring 32, and moves thefirst plate 16 until it is placed perpendicularly to therod 15 and, therefore, in the non-blocking position. On the other side, thespring 30 stretches to keep thesecond plate 17 in the sloped position, blocking therod 15, until the advancing runner comes to rest against this plate, forcing it too into a perpendicular position with respect to the rod 15 (Fig. 2). At this point, the back may be angled differently from the seat, varying the angle without having to worry about hitting the back of the person sitting on the chair. - Once the angle of the back has been chosen, moving the command lever and with it the runner back to its original backward position, the
plates spring 30, return to their sloped gripping position on the rod, thereby blocking the chair in its new position. - It should also be noted that, when the runner is in the forward position, an outward movement of the command lever according to arrow B brings the shoulder 28' into contact with the blocking
tooth 29, a condition in which the lever is unable to complete the reverse movement, which means that the non-blocking position of the chair can be stabilised according to necessity.
Claims (6)
- In a chair or seating structure like office chairs and armchairs, car seats and similar devices, comprising a stationary body (11) fixed to a support upright and bearing the seat, an oscillating support (12) hinged to the stationary body and bearing the back and elastic means for connecting the stationary body and the oscillating support, so as to oppose the oscillations of the latter, a device (10) for blocking the swinging of the oscillating support bearing the back in any position, with respect to the stationary body bearing the seat, characterised by:a cylindrical rod (15) connected to the oscillating support (12), extending forwards under the stationary body (11) and sliding through a guiding block (20);two gripping plates (16,17) placed obliquely to the cylindrical rod (15), each with a foot rotating on the stationary body and with a hole to permit the rod to pass, and where said plates (16,17) can move from an orthogonal non-blocking position, where they are perpendicular to the cylindrical rod and the axis of their cross-holes coincides with the axis of said rod, for the sliding of the latter, and a sloped blocking position, where the edge of the cross-holes interacts with the external surface of the rod, blocking it axially;said plates, when in the sloped blocking position, are angled in opposing directions in such a way that one plate can act upon and block the rod in one direction and the other plate can do the same in the opposite direction;between the cylindrical rod (15) and the gripping plates (16,17) there are some means for keeping the plates normally in the sloped blocking position and for moving the plates, on command, to the orthogonal non-blocking position.
- Device according to claim 1, in which said cylindrical rod (15) is connected to the oscillating support (12) by means of a cross-pin (18), passing through ring holes (19) located in the stationary body.
- Device according to claims 1 and 2, in which said cylindrical rod (15) has a smooth or rough surface.
- Device according to claim 1, in which the gripping plates (16,17) are normally kept in the sloped blocking position by a spring (30) placed between the plates themselves and mounted on a small guiding rod (31) fixed to one plate and sliding with respect to the other.
- Device according to claims 1 and 4, in which the means for moving the plates (16,17) into the orthogonal non-blocking position include a runner (24) that can move with respect to the cylindrical rod (15) from a backward position near the hinge of said rod to a forward position near the plates, a spring (32) mounted in the runner in line with a pusher (33) which extends through the plates as far as a horizontally pivoted lever (34) which has its fulcrum at the guiding block of the cylindrical rod and which rests against a plate adjacent to said block, in such a way that the movement of the runner from the backward to the forward position corresponds to, firstly, the movement of one of the plates and, secondly, the movement of the other plate into the non-blocking position.
- Device according to claim 5, in which the runner (24) is connected to a command lever (23) which is capable of axial movements towards and away from the runner and of angular movements on a fulcrum, said lever, furthermore, being able to rotate so that it can control the means of regulating the height of the support upright of the chair.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99830689T ATE300208T1 (en) | 1999-11-02 | 1999-11-02 | SLIDING OR LOCKING DEVICE FOR ADJUSTING OR CHANGING A POSITION OF CHAIRS OR PARTS THEREOF |
DE69926375T DE69926375D1 (en) | 1999-11-02 | 1999-11-02 | Sliding or shut-off device for adjusting or changing a position of chairs or parts thereof |
EP99830689A EP1097660B1 (en) | 1999-11-02 | 1999-11-02 | A sliding blocking device for varying and regulating the position of chair structures and/or their parts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99830689A EP1097660B1 (en) | 1999-11-02 | 1999-11-02 | A sliding blocking device for varying and regulating the position of chair structures and/or their parts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1097660A1 true EP1097660A1 (en) | 2001-05-09 |
EP1097660B1 EP1097660B1 (en) | 2005-07-27 |
Family
ID=8243655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99830689A Expired - Lifetime EP1097660B1 (en) | 1999-11-02 | 1999-11-02 | A sliding blocking device for varying and regulating the position of chair structures and/or their parts |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1097660B1 (en) |
AT (1) | ATE300208T1 (en) |
DE (1) | DE69926375D1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1466417A (en) * | 1965-12-01 | 1967-01-20 | Publicite Francaise | Mechanical locking device and its applications, in particular to adjustable seats |
EP0069207A1 (en) * | 1981-06-26 | 1983-01-12 | Rockwell International Corporation | Seat positioner |
US4441381A (en) * | 1982-09-30 | 1984-04-10 | General Engineering & Manufacturing Corp. | Locking and positioning apparatus for reclining seats |
US4452098A (en) * | 1982-07-02 | 1984-06-05 | General Engineering & Manufacturing Corp. | Locking and positioning device for reclining seats |
US5105486A (en) * | 1990-06-18 | 1992-04-21 | Joerns Healthcare Inc. | Adjustable bed |
GB2278772A (en) * | 1993-06-10 | 1994-12-14 | Johnson Controls Adwest | Lever actuated seat recliner |
-
1999
- 1999-11-02 AT AT99830689T patent/ATE300208T1/en not_active IP Right Cessation
- 1999-11-02 EP EP99830689A patent/EP1097660B1/en not_active Expired - Lifetime
- 1999-11-02 DE DE69926375T patent/DE69926375D1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1466417A (en) * | 1965-12-01 | 1967-01-20 | Publicite Francaise | Mechanical locking device and its applications, in particular to adjustable seats |
EP0069207A1 (en) * | 1981-06-26 | 1983-01-12 | Rockwell International Corporation | Seat positioner |
US4452098A (en) * | 1982-07-02 | 1984-06-05 | General Engineering & Manufacturing Corp. | Locking and positioning device for reclining seats |
US4441381A (en) * | 1982-09-30 | 1984-04-10 | General Engineering & Manufacturing Corp. | Locking and positioning apparatus for reclining seats |
US5105486A (en) * | 1990-06-18 | 1992-04-21 | Joerns Healthcare Inc. | Adjustable bed |
GB2278772A (en) * | 1993-06-10 | 1994-12-14 | Johnson Controls Adwest | Lever actuated seat recliner |
Also Published As
Publication number | Publication date |
---|---|
DE69926375D1 (en) | 2005-09-01 |
ATE300208T1 (en) | 2005-08-15 |
EP1097660B1 (en) | 2005-07-27 |
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