WO1999027819A1 - Dual power unit for movement of a back and a footrest in armchairs and the like - Google Patents
Dual power unit for movement of a back and a footrest in armchairs and the like Download PDFInfo
- Publication number
- WO1999027819A1 WO1999027819A1 PCT/EP1998/007338 EP9807338W WO9927819A1 WO 1999027819 A1 WO1999027819 A1 WO 1999027819A1 EP 9807338 W EP9807338 W EP 9807338W WO 9927819 A1 WO9927819 A1 WO 9927819A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slider
- movement
- screw
- shaft
- power unit
- Prior art date
Links
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
- A47C1/031—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
- A47C1/03211—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 electric motors
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
- A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
- A47C20/041—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by electric motors
Definitions
- the present invention relates to a power unit of the type employed for movement of a back and a footrest in armchairs and the like.
- dual motors which are formed of a generally elongated rectangular casing comprising, at the inside thereof, two motor reducers and two transmission-gears for rotation of a pair of movement shafts. Connected to one of these shafts is the kinematic movement mechanism of the armchair back and to the other of said shafts the kinematic movement mechanism of the armchair footrest.
- a drawback of such a structure is that the piston, in order to supply a sufficient rotation angle of the movement shaft, must nearly double its length when it passes from the retracted condition to the completely extended condition. For the above reason the longitudinal sizes of the power unit are relatively high. In addition, even when a greater rotation angle would be preferable, this is not possible because it would involve accomplishment of a too long power unit, incompatible with the armchair sizes.
- a dual power unit for movement of a back and a footrest in a power-driven armchair comprising an elongated casing which, close to each end, has a transverse-movement shaft which is connected to a shaft of an electric motor reducer through a transmission-gear, the transmission-gear comprising a screw connected to the shaft of the motor reducer and extended transversely of the movement shaft and longitudinally of the casing and a threaded siding slider into which the screw is screwed down, cam means being integral with the movement shaft and bearing on the slider for converting the sliding movement of the slider along the screw into an angular-rotation movement of the movement shaft, characterized in that the screw thoroughly crosses the slider and in that the cam means comprises two cam elements laterally projecting from
- FIG. 1 is an elevation side view partly in section of a power unit in accordance with the invention
- Fig. 2 is a plan view partly in section of the power unit shown in Fig. 1;
- Fig. 3 represents a cross-sectional view taken along line III-III in Fig. 1;
- FIG. 4 is a perspective view of two parts of the power unit shown in Fig. 1;
- a dual power unit generally denoted by 10, comprises an elongated casing 11 which, close to each end, has a transverse-movement shaft 12.
- the two movement shafts 12 are parallel to each other.
- the motor reducers advantageously have electric motors 29, 30 extending in an axis transverse to the casing and in opposite directions with respect to each other, on the two casing sides.
- the transmission-gear 15 comprises a screw 16 axially connected to the motor reducer shaft 13 and extended transversely of the movement shaft and longitudinally of the casing.
- the transmission-gear further comprises a threaded sliding slider 17 into which a screw is screwed down. Screw 16 thoroughly crosses slider 17.
- Cam means 18 is integral with the movement shaft 12 and bears on the slider to convert the sliding movement of the slider along the screw into an angular-rotation movement of the movement shaft.
- the cam means comprises two cam elements 19, 20, laterally projecting from the movement shaft 18 for resting on thrust surfaces 21, 22 that are provided on the slider on opposite sides of the screw.
- the free ends of the cam elements are rounded off in the rotation plane.
- the straight line joining the two contact points between the surfaces 19, 20 and the cam head passes through the screw axis, so that the operating effort can be applied along the screw axis itself.
- the thrust surfaces 21, 22 are bottom walls of seatings 25, 26 in the slider receiving the free ends of the cam elements. As shown in Fig. 1, the seatings are open on top and at the sides to enable the free movement of the cam elements resting on surfaces 21, 22.
- the cam elements have their free end generally bent in a direction parallel to the screw and towards the thrust surface.
- the slider slides in a seating or cavity 40 in the casing, laterally guided by a plurality of parallel matching ribs 23, 24 present on side walls of the slider and seating.
- the ribs define a plurality of parallel grooves. Ribs provided on the slider fit into grooves provided in the seating and vice-versa. It has been found that this enables an excellent sliding without any lubrication being required and in addition there is a high resistance to rotation and no jamming occurs .
- each shaft 12 may comprise a closeable opening 27 disposed laterally of the movement shaft for radial removal therefrom of said shaft and the cam elements integral therewith forming a cam assembly 28, as shown in Fig. 4.
- the slider can have an element 31 for operation of a pair of end-of-stroke or limit microswitches 32, 33.
- Diagrammatically shown in fig. 5 is an armchair 34 having a base seat 35 with a back 36 and a footrest 37 hinged thereon.
- the armchair is comprised of a power unit 10 the shafts 12 of which control movement of the back and footrest by means of kinematic mechanisms 38, 39.
- the power unit shown can have a rotation angle a of about 60° with a stroke of the slider of about 5 cm and an overall length of the power unit of only 40 cm.
- the proportions of the different parts can vary depending on practical requirements.
- the slider may be obtained by moulding of a plastic material.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nursing (AREA)
- Dentistry (AREA)
- Transmission Devices (AREA)
- Massaging Devices (AREA)
- Seats For Vehicles (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/555,286 US6300732B1 (en) | 1997-12-02 | 1998-11-13 | Dual power unit for movement of a back and footrest in armchairs and the like |
JP2000522816A JP2001524335A (en) | 1997-12-02 | 1998-11-13 | Dual power unit for moving the backrest and footrest of armchair and similar products (DUALPOWER UNIT) |
AU13386/99A AU1338699A (en) | 1997-12-02 | 1998-11-13 | Dual power unit for movement of a back and a footrest in armchairs and the like |
EP98956920A EP1035788A1 (en) | 1997-12-02 | 1998-11-13 | Dual power unit for movement of a back and a footrest in armchairs and the like |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1997MI000859U IT238082Y1 (en) | 1997-12-02 | 1997-12-02 | DOUBLE MOTOR UNIT FOR THE HANDLING OF THE BACK AND FOOTREST IN ARMCHAIRS AND SIMILAR |
ITMI97U000859 | 1997-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999027819A1 true WO1999027819A1 (en) | 1999-06-10 |
Family
ID=11376878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/007338 WO1999027819A1 (en) | 1997-12-02 | 1998-11-13 | Dual power unit for movement of a back and a footrest in armchairs and the like |
Country Status (6)
Country | Link |
---|---|
US (1) | US6300732B1 (en) |
EP (1) | EP1035788A1 (en) |
JP (1) | JP2001524335A (en) |
AU (1) | AU1338699A (en) |
IT (1) | IT238082Y1 (en) |
WO (1) | WO1999027819A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002024035A1 (en) * | 2000-09-21 | 2002-03-28 | Cimosys Limited | Furniture drive embodied as a double drive |
WO2002098262A1 (en) * | 2001-06-06 | 2002-12-12 | Cimosys Ag | Electromotive furniture drive for displacing parts of a piece of furniture in relation to each other |
EP1190651A3 (en) * | 2000-09-22 | 2003-07-30 | Franke GmbH & Co. KG | Adjusting device for sleeping or seating furniture with at least one swivel part connected by a torsion bar to the sleeping or seating furniture |
EP3207829A1 (en) * | 2016-02-16 | 2017-08-23 | DewertOkin GmbH | Electric motor furniture drive |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6345867B1 (en) | 2000-06-02 | 2002-02-12 | Fisher Dynamics Corporation | Seat recliner and floor latch with interlock |
DE10157650C1 (en) * | 2001-11-26 | 2003-04-24 | Cimosys Ltd | Electric motor setting drive for adjustable furniture item has separate drive units at opposite ends of support strut |
US7152922B2 (en) * | 2004-05-07 | 2006-12-26 | Fisher Dynamics Corporation | Powered remote release actuator for a seat assembly |
DE102004023245A1 (en) * | 2004-05-07 | 2005-12-01 | Dewert Antriebs- Und Systemtechnik Gmbh & Co Kg | Electromotive linear drive |
DE202004007549U1 (en) * | 2004-05-07 | 2004-09-09 | Dewert Antriebs- Und Systemtechnik Gmbh & Co. Kg | Furniture |
DE202004020384U1 (en) * | 2004-05-17 | 2005-05-12 | OKIN Gesellschaft für Antriebstechnik mbH & Co. KG | Double drive for adjusting parts of a piece of furniture |
US20060138839A1 (en) * | 2004-12-01 | 2006-06-29 | Ryan Christopher J | Flip and slide seat assembly |
EP1983863A1 (en) * | 2006-02-17 | 2008-10-29 | Linak A/S | A piece of furniture such as a bed or a chair |
EP2001339B1 (en) * | 2006-03-30 | 2015-05-06 | Linak A/S | Linear actuator with potentiometer |
ATE502550T1 (en) * | 2006-04-05 | 2011-04-15 | Linak As | LINEAR ACTUATOR FOR A PIECE OF FURNITURE |
DE102012219113A1 (en) * | 2011-11-09 | 2013-05-16 | Dewertokin Gmbh | Electromotive linear drive, in particular for adjusting reclining and seating furniture |
DE202012102949U1 (en) * | 2012-08-06 | 2012-09-03 | Ciar S.P.A. | Drive system with a linear actuator and furniture with such a drive system |
TWI803397B (en) * | 2022-07-21 | 2023-05-21 | 施權航 | electric bed |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4136373A1 (en) * | 1991-11-05 | 1993-05-06 | Dietmar Dipl.-Ing. 5270 Gummersbach De Koch | Drive for slatted bases of recliners or beds - has two facing cavities holding axles, with closure piece, servo motor, gear, housing, control, driven shaft and worm gear |
EP0583660A1 (en) * | 1992-07-31 | 1994-02-23 | CIAR S.r.l. | Device for inclining beds and couches |
DE9417433U1 (en) * | 1994-10-18 | 1995-01-05 | OKIN Gesellschaft für Antriebstechnik mbH & Co. KG, 51645 Gummersbach | Drive for adjusting parts of seating furniture |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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GB1263261A (en) * | 1968-02-06 | 1972-02-09 | Sevcon Eng Ltd | Improvements in electrically operated drive systems |
US4475072A (en) * | 1982-11-12 | 1984-10-02 | General Electric Company | Patient-positioning X-ray table |
US5044647A (en) * | 1989-11-17 | 1991-09-03 | Folio Products, Inc. | Stabilized reclining wheelchair seat |
US5074000A (en) * | 1991-01-11 | 1991-12-24 | Ssi Medical Services, Inc. | Apparatus for performing head and foot Trendelenburg therapy |
US5253724A (en) * | 1991-10-25 | 1993-10-19 | Prior Ronald E | Power wheelchair with transmission using multiple motors per drive wheel |
US5435404A (en) * | 1992-07-31 | 1995-07-25 | Garin, Iii; Paul V. | Powered mobility chair for individual |
US5701965A (en) * | 1993-02-24 | 1997-12-30 | Deka Products Limited Partnership | Human transporter |
US5450800A (en) * | 1994-03-15 | 1995-09-19 | Leonard; Joseph W. | Ergonomically adjustable computer workstation |
WO1996012123A1 (en) * | 1994-10-18 | 1996-04-25 | Dietmar Koch | Mechanism for adjusting parts of seating and reclining furniture |
US5667035A (en) * | 1995-10-19 | 1997-09-16 | Hughes; Douglas J. | Overhead platform elevation device |
US6176335B1 (en) * | 1996-07-03 | 2001-01-23 | Pride Mobility Products, Corporation | Power wheelchair |
US5894097A (en) * | 1997-03-27 | 1999-04-13 | Barry; Kenneth J. | Pick for stringed musical instruments |
-
1997
- 1997-12-02 IT IT1997MI000859U patent/IT238082Y1/en active IP Right Grant
-
1998
- 1998-11-13 AU AU13386/99A patent/AU1338699A/en not_active Abandoned
- 1998-11-13 JP JP2000522816A patent/JP2001524335A/en active Pending
- 1998-11-13 EP EP98956920A patent/EP1035788A1/en not_active Withdrawn
- 1998-11-13 WO PCT/EP1998/007338 patent/WO1999027819A1/en not_active Application Discontinuation
- 1998-11-13 US US09/555,286 patent/US6300732B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4136373A1 (en) * | 1991-11-05 | 1993-05-06 | Dietmar Dipl.-Ing. 5270 Gummersbach De Koch | Drive for slatted bases of recliners or beds - has two facing cavities holding axles, with closure piece, servo motor, gear, housing, control, driven shaft and worm gear |
EP0583660A1 (en) * | 1992-07-31 | 1994-02-23 | CIAR S.r.l. | Device for inclining beds and couches |
DE9417433U1 (en) * | 1994-10-18 | 1995-01-05 | OKIN Gesellschaft für Antriebstechnik mbH & Co. KG, 51645 Gummersbach | Drive for adjusting parts of seating furniture |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002024035A1 (en) * | 2000-09-21 | 2002-03-28 | Cimosys Limited | Furniture drive embodied as a double drive |
JP2004508866A (en) * | 2000-09-21 | 2004-03-25 | シモジズ リミテッド | Furniture drive formed as a double drive |
US7331557B2 (en) | 2000-09-21 | 2008-02-19 | Linak A/S | Furniture drive embodied as a double drive |
EP1190651A3 (en) * | 2000-09-22 | 2003-07-30 | Franke GmbH & Co. KG | Adjusting device for sleeping or seating furniture with at least one swivel part connected by a torsion bar to the sleeping or seating furniture |
WO2002098262A1 (en) * | 2001-06-06 | 2002-12-12 | Cimosys Ag | Electromotive furniture drive for displacing parts of a piece of furniture in relation to each other |
EP3207829A1 (en) * | 2016-02-16 | 2017-08-23 | DewertOkin GmbH | Electric motor furniture drive |
Also Published As
Publication number | Publication date |
---|---|
EP1035788A1 (en) | 2000-09-20 |
ITMI970859U1 (en) | 1999-06-02 |
IT238082Y1 (en) | 2000-09-29 |
AU1338699A (en) | 1999-06-16 |
US6300732B1 (en) | 2001-10-09 |
JP2001524335A (en) | 2001-12-04 |
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