EP3051979A2 - Lift-recliner chair - Google Patents
Lift-recliner chairInfo
- Publication number
- EP3051979A2 EP3051979A2 EP14790245.6A EP14790245A EP3051979A2 EP 3051979 A2 EP3051979 A2 EP 3051979A2 EP 14790245 A EP14790245 A EP 14790245A EP 3051979 A2 EP3051979 A2 EP 3051979A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- chair
- seat
- lift
- base
- backrest
- 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
Links
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- 239000004744 fabric Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000003197 gene knockdown Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
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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
- A47C1/0242—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 electric motors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/14—Standing-up or sitting-down aids
-
- 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
- A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
- A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
-
- 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
-
- 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
Definitions
- This invention relates to powered lift-recliner chairs, and in particular concerns lift- recliner chairs of the type where the actuator and support arrangement for moving the adjustable parts of the chair is integrated into the structure of the chair.
- Integrated lift-recliner chairs typically comprise a number of relatively moveable sections, including a floor standing base section, an angularly adjustable seat section, and an adjustable backrest section pivotally connected to the seat section.
- the seat is movable between a generally horizontal seating position and an inclined or tilted raised position to assist the occupant moving between seated and standing positions.
- An adjustable foot rest may also be provided.
- the base and seat sections each comprises a pair of side panels arranged substantially parallel with each other on both sides of the chair to shield the actuator arrangement located in the interior of the chair.
- the base and seat sections are arranged in a telescopic nesting configuration.
- the seat section is telescopically extendable from the base section to raise and lower the chair.
- each adjustable section is provided with a dedicated powered actuator, usually an electrical linear actuator or jack, for independent movement relative to other sections of the chair.
- the base and seat sections include respective actuator mounting brackets between which an actuator is mounted for moving the seat section relative to the base section about its pivot axis.
- Actuator mounting brackets are also provided on the seat section and the backrest between which a second actuator is mounted for moving the backrest relative to the seat section.
- the recliner function of the chair is provided by the operation of a dedicated actuator and the lift function is independently provided by a further dedicated actuator.
- a lift and recline chair of the aforementioned type is also disclosed in WO2012/032305 which has a single actuator operative to provide both the lift and recline function of the chair.
- WO2012/032305 concerns lift and recline arrangements which have a so called nesting configuration, that is to say a chair having an inner and outer frame with one of the frames comprising a fixed floor standing base frame and the other a movable seat frame that can be telescopically extended from the base.
- This arrangement provides for an inherently safe structure that eliminates many of the potential pinch and stress pofnfs commonly associated with moveable furniture.
- the telescopic nature of nesting inner and outer frames can however place some restriction on the aesthetics of the item of furniture and add additional design constraints.
- the arm rests tend to be split, with part of the arm or armrest being associated with the fixed base frame and the other part being associated with the moveable seat frame. This can complicate the design and manufacturing process.
- a lift-recliner chair comprising a base section, movable seat and backrest sections and actuator means for moving the seat and backrest sections to later the configuration of the chair, the seat section being pivotally mounted with respect to the base section and the backrest section being pivotally mounted with respect to the seat section, at least one guide associated with one of the base and the seat sections and at least one follower associated with the other of the base and the seat sections and movable along said guide, said guide being of arcuate form to guide the seat for relative pivoting like movement with respect to the base about a pivot axis located at the centre of curvature of the guide to raise and lower the chair, the base section having a pair of parallel side panels on respective lateral sides of the chair, the seat section having a pair of elongate side members, adjacent the side panels, which carry one of the said gtiide or follower associated with the seat section
- the elongate side members provide a simple but effective means of mounting the seat section relative to the base, which allows the
- the fixed arms can be provided at a height which best suits the user for ingress and egress when the chair is raised and for comfortable sitting when the chair is lowered.
- the design of the elongate side members can therefore be optimised in terms of size and weight for the single function of pivotally mounting the seat section relative to the base.
- Lateral shielding of the moving parts including the actuator is achieved solely by the side panels which are preferably dimensioned to enclose points of potential entrapment around the sides of the chair.
- the elongate side members each comprise an arcuate member, preferably a planar arcuate member. In this way the elongate side members can be approximately the same size and shape as the arcuate guides and be positioned closely adjacent the respective side panels.
- the elongate side members preferably carry the at least one follower, preferably two, most preferably three followers.
- the followers are circumferentially spaced apart so that the potential for misalignment of the followers in the guides is reduced.
- the guide is preferably provided in or on the side panels.
- the followers are provided on the respective elongate members for mounting the seat section with respect to the base.
- the elongate side members preferably lie parallel with and adjacent to the respective side panels.
- the elongate side members are disposed in the interior region of the chair between the side panels, preferably in all adjustment positions of the chair. In this way the elongate side members can be arranged so that they do not project beyond the top edge of the side panels in any position of the chair. As such the elongate side members may not compromise the aesthetic design of the chair.
- the elongate side members may therefore be considered to be hidden within the internal structure of the chair, completely hidden from view in the lowered or raised configuration of an upholstered chair constructed in accordance with this aspect of the invention.
- the actuator means preferably includes a single actuator for co-ordinated movement of both the seat and backrest sections.
- the single actuator has a first range of movement for moving the backrest with respect to the seat section to provide the recliner function of the chair and a second range of movement for moving the seat section and backrest with respect to the base to provide the lift function of the chair.
- This aspect of the present invention is particularly advantageous as only a single actuator, for example a powered motor, gas strut or spring, is required to provide both the lift and recline functions of the chair. This reduces the cost of the chair significantly compared with arrangements where two dedicated actuators are provided for the two separate functions of the chair. Thus there is a significant saving in manufacturing costs which affords wider appeal in the marketplace for the aforementioned type of lift-recliner chair.
- a single actuator for example a powered motor, gas strut or spring
- the first and second ranges of movement are contiguous. In this way the second range of movement immediately follows the first.
- movement of the actuator means in the first range of movement exclusively moves the backrest with respect to the seat and base to provide the recliner function
- movement of the actuator means in the second range exclusively moves the seat and backrest with respect to the base to provide the said lift function.
- movement of the backrest with respect to the seat section is unfettered in the first range of movement. Movement of the backrest in the second range of movement is prevented by engagement of respective engagement parts of the backrest and seat sections.
- the engagement parts engage by mutual abutment as the actuator means moves from the first range to the second range, and the engagement parts disengage as the actuator moves from the second range to the first.
- engagement and disengagement is simply and conveniently effected at the transition between the first and second ranges of the actuator movement.
- At least part of the seat section is provided with a first engagement part which accommodates a second engagement part of the backrest, which second engagement part moves freely in the first engagement part through the said first range of movement and engages an abutment stop of the first engagement part at the transition between the said first and second ranges of movement.
- the backrest preferably includes a cross-member which extends between the said first engagement parts with the ends of the cross-member being provided with lever arms accommodated in the respective first engagement parts, said lever arms providing the said second engagement parts on both sides of the chair.
- the actuator is a preferably a linear actuator. Actuator loads can be minimised by selective placement of a linear actuator to maximise the turning moment applied to the movable sections of the chair.
- the actuator is connected at one end to the base and at the other end to the backrest.
- the actuator thus provides a connection between the base and the backrest and thereby supports a static load when the seat is raised.
- the linear actuator maybe connected to the backrest cross-member. This readily enables actuator load to be applied first to the backrest in its first range of movement and then to the seat section, via engagement of the seat section with the backrest, in the second range of movement.
- the actuator means comprises a push only actuator.
- the chair further comprises a pair of armrests, preferably the armrests are fixed in relation to the base.
- This provides for fixed armrests which remain stationary when the chair is either raised or lowered.
- This can be particularly advantageous as a single sub-frame arm structure can be employed with the arm of the chair entirely integrated into the fixed base section, as compared with known arrangements where a split arm arrangement has been necessary.
- the seat section comprises a seat frame and the side members intersect the plane of the seat frame.
- the seat section comprises a seat frame and the side members extend in a forwards and downwards direction with respect to the frame.
- the elongate side members each comprise an arcuate member
- the seat section comprises a seat frame and the side members extend in a forwards and downwards direction with respect to the frame, and a major part of the arcuate members extends below the plane of the frame with the concave side of the arcuate members facing forwards towards the front of the chair.
- the pivot axis of the seat section is defined by the centre of curvature of the said at least one guide and the elongate arcuate side members have a centre of curvature coincident with the pivot axis of the seat section.
- a Iift-recliner chair comprising a floor standing base section, movable seat and backrest sections and actuator means for moving the seat and backrest sections, the seat section being pivotally mounted with respect to the base section and the backrest being pivotally mounted with respect to the seat section, characterised in that the said actuator means includes a single push only actuator for co-ordinated movement of both the seat and backrest sections.
- the said actuator means includes a single push only actuator for co-ordinated movement of both the seat and backrest sections.
- the lift-recline chair according to this aspect of the invention is particularly suited to this type of actuator as the fully engaged drive force is only required in one direction, that is to say in the direction that raises the seat section and/or the backrest.
- Figure 1 is perspective view from the front of a Iift-recliner chair frame according to an embodiment of the present invention, with the chair frame shown in a fully reclined position;
- Figure 2 is a perspective view similar to Figure 1 with the chair frame shown in an upright position;
- Figure 3 is a perspective view similar to Figures 1 and 2 with the chair frame shown in a fully raised position;
- Figure 4 is perspective view identical to Figure 1 with the base section left hand side panel omitted for illustrative purposes only;
- Figure 5 is perspective view identical to Figure 2 with the base section left hand side panel omitted;
- Figure 6 is perspective view identical to Figure 3 with the base section left hand side panel omitted;
- Figure 7 is perspective view identical to Figure 1 with the base section left hand side panel and foot rest omitted for illustrative purposes only;
- Figure 8 is perspective view identical to Figure 2 with the base section left hand side panel and foot rest omitted;
- Figure 9 is perspective view identical to Figure 3 with the base section left hand side panel and foot rest omitted;
- Figure 10 is perspective view from the rear of the lift-recliner chair frame shown in Figure 1 with the base section left hand side panel omitted;
- Figure 1 1 is perspective view from the rear of the lift-recliner chair frame shown in Figure 1 with the base section left hand side panel omitted and the chair in the upright configuration of Figure 2;
- Figure 12 is perspective view from the rear of the lift-recliner chair frame shown in Figure 1 with the base section left hand side panel omitted and the chair in the raised configuration of Figure 3;
- Figure 13 is a side view of the chair of Figure 1 with the base section left hand side panel omitted with the chair in the reclined configuration of Figure 1 ;
- Figure 14 is a side view of the chair of Figure 1 with the base section left hand side panel omitted with the chair in the upright configuration of Figure 2;
- Figure 15 is a side view of the chair of Figure 1 with the base section left hand side panel omitted with the chair in the raised configuration of Figure 3;
- Figure 16 is a perspective view of the chair of Figures 1 to 15 with the armrests shown;
- Figure 17 is perspective view similar to Figure 1 1 with the chair having a rear panel and roller blind arrangement, the base section left hand side panel and rear panel of the chair indicated in transparent ghost outline,
- Figure 18 is a side view of the chair of Figure 17 with the base section left hand side panel of the chair indicated in transparent ghost outline, with the chair in the upright configuration of Figure 2;
- Figure 19 is perspective view of a lift recliner chair frame according to a second embodiment of the present invention with the chair frame shown in an upright position;
- Figure 20 is perspective view of the chair of Figure 19 with the seat section left hand side panel of the chair indicated in transparent ghost outline;
- Figure 21 is perspective view from the rear of the lift-recliner chair frame shown in Figures 19 and 20 with the seat section left hand side panel shown in ghost outline, and the chair in the upright configuration of Figures 19 and 20;
- Figure 22 is perspective view of a lift-recliner chair frame according to a further arrangement, with the chair frame shown in a fully raised position;
- Figure 23 is a perspective view from the rear of the lift-recliner chair frame of Figure 22 in a fully raised position
- Figure 24 is perspective view of the chair of Figure 22, similar to the view of Figure 22, with the seat section left hand side panel of the chair indicated in transparent ghost outline;
- Figure 25 is a perspective view from the rear of the lift-recliner chair frame shown in Figure 22 with the seat section left hand side panel shown in ghost outline; and.
- Figure 26 is a perspective view of the chair of Figure 22, similar to the view of Figure 22, with the seat section left hand side panel and seat cushion support frame of the chair indicated in transparent ghost outline;
- Figures 1 to 12 and Figure 17 are perspective views of the structural frame 10 of a lift-recliner chair according to an embodiment of the present invention. It is to be understood that the frame 10 constitutes the frame of a lift and recline chair before being upholstered.
- the frame is constructed principally from board material of the type typically used in the furniture industry, for example MDF or engineering board which is readily machineable on a CNC router or the like.
- the frame 10, and hence the chair, includes a base support section 12, a seat support section 1 , and a backrest section 16.
- the base section includes a pair of lateral side panels 18 and a rear panel 31 ( Figures 16, 17 and 18) extending between the side panels at the rear of the chair.
- the base section 12 constitutes the floor standing part of the chair and includes a pair of chassis legs in the form of elongate members 20 (see Figure 16) which extend parallel to each other on the lateral (left and right hand) sides of the chair.
- the elongate members 20 are attached to the respective side panels 18 at the lower edges 22 thereof and extend outwards perpendicularly therefrom.
- the chassis legs 20 constitute floor support members to which castors, support feet or the like may be attached for contact with the floor on which the chair stands.
- the chassis legs are preferably constructed from the same board material as the rest of the frame 10.
- arm rests in the form of profiled elongate members 21 are attached to the respective side panels 18 at the upper edges thereof and extend perpendicularly outwards therefrom.
- the armrests 21 constitute part of an arm rest frame and combine with the elongate members 20 and front and rear closure panels 23 and 25 to provide an armrest sub-frame structure on respective sides of the chair.
- the sub-frame structure has the shape of a conventional armrest of an upholstered chair.
- the side panels 18 are connected together at the front and rear of the chair by front and rear cross-members 24 and 26 which extend between the panels in the region of the panel bottom edges 22, as can best be seen in Figures 7-9.
- the cross-members 24 and 26 are of tubular metal construction and are provided with perpendicular mounting flanges 27 for attachment to the respective side panels 18, typically by means of suitable fasteners such as screws or the like.
- the side panels 18, rear panel 31 ( Figure 16), elongate chassis legs 20 and cross- members 24, 26 define an outer open box like structure for supporting the other parts of the chair.
- the seat section 14 comprises a support structure constructed primarily of board material and comprises a generally rectangular hollow frame 28 and a pair of arcuate elongate downwardly depending lateral side members 30.
- the seat frame 28 supports the seat pad (not shown) of the chair in a manner well known to those skilled in the art.
- the elongate lateral side members are preferably of planar metal sheet construction.
- the lateral sides of the frame 28 are connected to metal reinforcement members 29 that extend from front to back along the lateral sides of the frame 28.
- the reinforcement members 29 are connected to the frame 28 by suitable fixings such as screw fixings or the like and are further connected to, or integrally formed with, the respective arcuate lateral side members 30, which intersect the plane of the frame 28 extending in a forwards and downwards direction with respect to the frame 28.
- the major part of the arcuate members extends below the plane of the frame 28 with the concave side of the arcuate members facing forwards towards the front of the chair.
- the seat section 14 locates within the base section 12 between the side panels 18 and is pivotally connected thereto by a series of guides and followers in a similar manner to the arrangements disclosed in WO2005/ 132481 , the contents of which are incorporated herein by reference.
- Arcuate guide slot inserts 32 are provided in corresponding slots in the panels 18.
- the guide slot inserts 32 are preferably of nylon or other suitable polymeric material.
- the guide slots 32 each receive three spaced followers in the form of rollers 34 rotatably mounted on adjacent seat section arcuate side members 30.
- the rollers are positioned on the outward facing side of the elongate side members.
- the rollers are free to run in the guide slots 32 to provide angular adjustment of the seat position.
- the pivot axis of the seat section is defined by the centre of curvature of the slots 32.
- the elongate arcuate side members 30 of the seat section have a centre of curvature coincident with the centre of curvature of the slots 32 and hence the pivot axis of the seat section.
- the elongate side members are contained entirely within the space envelope defined by the side panels 18 in all adjustment positions of the chair, that is to say they do not project above the top edges of the respective side panels when the seat section is fully raised and the side members fully extended. The amount of adjustment is determined by the extent of travel of the rollers 34 in the circumferential slots 32.
- the width dimension of the seat section is slightly less than the width dimension of the base section between the side panels 18, so that the seat section locates within the base section and is extendable thereform when pivoted about its pivot axis to the raised position shown in Figures 3, 6, 9, 12 and 15.
- the base section may be considered to comprise an outer frame of the chair, complete with arm rests (as seen in Figure 16 only), and the seat section an inner frame which is movable within the fixed frame of the base.
- the present invention also contemplates embodiments where the seat section forms an outer frame and the base section an inner frame of the chair, as described in more detail below, by way of example only, with respect to the chair shown in the drawings of Figures 19 to 21 .
- the seat section is provided with a pair of brackets 62 at the rear corners of the frame 28.
- the purpose of the brackets is significant to the function of the illustrated embodiment of the present invention and will be discussed in more detail below, in relation to the operation of the backrest 16 and the lifting function of the chair.
- the backrest 16 is constructed as a separate knock down component in the form of a structural frame.
- the backrest comprises a removable, generally rectangular shaped, frame 40 which is attached to connecting parts 42 of a pivot mounting arrangement 60 which pivotally connects the backrest to the seat section at pivot 44.
- the removable frame 40 is typical of a removable knock down backrest used in the upholstered furniture industry for recliner chairs having female connecting parts 46 which receive corresponding male connecting parts of brackets 48 of the pivot mounting arrangement 60.
- the pivot mounting arrangement 60 is preferably of metal construction and comprises: a tubular cross-member 50 which extends across the width of the chair at the bottom of the backrest frame 40, with ends of the cross-member 50 disposed on respective lateral sides of the chair; a pair of pivot mounting brackets 62 disposed at the rear of the seat frame 22 at respective left and right hand rear corners thereof; a pair of lever arms 52 which extend from the respective ends of the cross member 50 to the pivot 44 where they are mounted on respective pivot pins 64 carried by the respective brackets 62.
- the brackets 62 are fixed to the reinforcement members 29 of the seat frame 28 by welding or other means.
- the brackets 62 each comprise a pair of parallel side plates 66a, 66b which are spaced apart to accommodate the distal end of the lever arm. Sufficient clearance is provided between the side plates 66a, 66b for the lever arms to move freely on the respective pivot pins which extend between the respective side plates 66a, 66b.
- each bracket 62 is closed at the rear, or partially closed, between the plates 66a, 66b to create an abutment stop to limit the extent of upwards pivotal movement of the lever arms in the brackets by engagement with the abutment part of the brackets when the backrest is returned to its upright position of Figure 2. This occurs when the backrest is moved to its maximum raised position relative to the seat section ( Figures 3, 6, 9 12 and 15) as will be explained in greater detail below.
- the brackets 62 are each provided with a further metal plate 67 which projects rearwards of the brackets 66b to provide additional shielding of possible entrapment points in the region of the brackets between the seat and backrest sections.
- the connecting brackets 48 are positioned slightly inboard of the levers 52 on the cross-member 50.
- the cross-member 50, lever arms 52 and connecting brackets 48 thus form a rigid integral structure and are preferably of metal construction joined together by welding.
- An electrical linear actuator (jack) 53 is connected between the base section cross-member 24 and the backrest section cross- member 50.
- the linear actuator is connected at one end to mounting bracket 54 midway along the cross-member 24 and connected at the other end to mounting bracket 56 midway along the cross-member 50 such that extension and retraction of the actuator causes the backrest to be pivoted about its pivot axis 44 and the seat section to be lifted or lowered.
- the actuator has two ranges of movement, first from a fully retracted position where the backrest is fully reclined, as shown in Figures 1 , 4, 7 and 13, to an intermediate extension position where the backrest is moved to an upright position by movement of the arms 52 to their abutment position as shown in Figures 2, 5, 8, and 14, and a second range of movement from the aforementioned intermediate position to a fully extended position which causes the seat section to rotate about its pivot axis due to abutting engagement of the arms 52 with the aforementioned abutments stops of the respective brackets 62 from the intermediate extension position onwards.
- the linear actuator connected between the cross-member mounting brackets 54 and 56 provides the necessary force, and hence motion, for moving the backrest with respect to the seat and base sections to provide the recliner function, and subsequently to move the backrest and seat section with respect to the base section to provide the lift function of the chair.
- the actuator 53 is an electrical linear actuator of the push only type, that is to say a linear actuator having a fully engaged drive in one direction only, for example and actuator such as the push only versions of the Alphadrive, Betadrive or Deltadrive linear actuators by DewertOkin. It will be understood that such an actuator provides inherent safety as a fully engaged driving force is only generated by the actuator in one direction.
- the lift chair described above is particularly suited to this type of actuator as the full drive force is only required in one direction.
- a push force is required as the actuator is extended to raise the chair and the weight carried by the chair.
- An actuator configured to provide both a push and pull force could result in crushing forces being applied to an obstruction caught between the moveable parts or sections of the chair when the actuator is retracted to lower the chair. This possibility is avoided with a push only actuator as any obstruction would only be subject to the weight of the chair and any external weight carried by the chair when the actuator is retracted. This is because in a push only actuator the drive force is immediately disengaged if an obstruction is encountered.
- the chair shown in Figures 1 to 18 also comprises a moveable footrest section 70 having a footrest board 72 moveable between a lowered position ( Figures 2, 3, 5, 6, 1 1 , 12, 14, 15, 17 and 18) in which the foot board lies vertically, providing a front closure panel at the front of the chair, and a raised horizontal position ( Figures 1 , 4, 10 and 13).
- the footrest 70 is provided with a dedicated linear actuator 74, independent of actuator 53, for moving the footrest board between the aforementioned positions as is well known to those skilled in the art.
- Actuator 74 could also be of the push only type if required.
- the rear of the base is closed between the top of the rear panel 31 and the lower end of the backrest by a fabric roller blind (not shown) wound on a spindle 76 secured between the side panels 18 behind the rear panel 31 in the interior region of the chair.
- a fabric roller blind wound on a spindle 76 secured between the side panels 18 behind the rear panel 31 in the interior region of the chair.
- the left hand side panel 18 and the rear panel 31 are shown in transparent ghost outline in the drawings of Figures 17 and 18 in order to show the interior detail of the chair including the spindle 76.
- the chair of Figures 1 to 15 is modified slightly in that the side panels 18 no longer form the arms of the chair.
- the panels 18 are cut back and profiled along their top edge and arranged inboard of an additional pair of outer panels 80 which are fixed in relation to the seat frame.
- the outer panels 80 combine with an additional rear panel 82 to provide an outer frame around the sides of the base section 12.
- the rear panel 82 extends between, and is fixedly secured to, the panels 80 at the rear of the chair.
- the panels 80 have a similar shape and size as the panels 18 on the previous embodiment, but additionally include scalloped regions 83 at the upper forward facing edge, mainly for design aesthetics of the finished product, and also have a slightly increased length so that they accommodate the modified inner frame panels 18.
- the outer panels 80 are fixedly secured to the seat frame 28 at various points along the sides thereof by means of L-shape, preferably metal, brackets 84.
- the panels 18 in the present embodiment have a much lower profile than in the previous embodiment.
- the top edge of the panels 18 first extends horizontally at substantially the same height as the top edge of the stowed footrest board 72, but then extends upwards to form an upstanding tongue 86 which accommodates the upper part of the curved guide slot insert 32, then, from a lower position than before the tongue, gently inclines upwards to a point approximately half way along the panel 18 when the incline becomes stepper to the top edge of the rear panel 31.
- the sides of the seat frame 28 are also modified in the embodiment of Figures 19 to 21.
- the sides of the seat frame are wider and provided with respective cut-out sections 88.
- the arms are provided, at least in part, by the outer side panels 80 so that, in contrast to the previous embodiment, the arms rise with the chair as the seat section is moved to its raised position.
- the side panels 18 and 80 combine to provide lateral shielding of the interior region of the chair, both when lowered and raised, as the inner 31 and outer 82 rear panels do at the rear of the chair.
- This is provided by the overlapping nature of the side panels 18 and 80, whereby the inner base section frame comprising the panels 18 and rear panel 31 nests with the outer moveable seat section frame comprising the side panels 80 and rear panel 82.
- the outer frame thereby being telescopically extendable from the stationary inner base section frame.
- a further modification to the embodiment of Figures 1 to 18 includes the provision of a pair of criss-cross bracing elements 90 which extend between the inner side panels 18 in the interior region of the chair, just rearward of the tongue section 86.
- the bracing elements 90 combine to increase the stiffness of the base section of the chair, to limit deflection of the base section parts in use.
- the chair of Figures 22 to 26 shares a similar nesting type arrangement as the embodiment of Figures 19 to 21 , with a stationary inner frame, comprising side panels 18, nested within an outer moveable frame comprising side panels 80.
- a stationary inner frame comprising side panels 18, nested within an outer moveable frame comprising side panels 80.
- the side panels 80 overlap with the inner side panels 18 to provide lateral shielding of the interior of the chair as previously described in relation to Figures 17 to 21.
- the bearing rollers 34 are mounted on arcuate metal brackets 90 fixed to the side panels 18 on both sides of the inner frame of the base section of the chair.
- the brackets 90 are located in cut out recesses 92 in the respective side panels, and project upwards of the top edge of the side panels 18 where two of the three bearings 34, on each side of the chair, are mounted for location in the respective slots 32.
- the circumferential distribution of the bearings 34 on the brackets 90 is such that the bearings 34 furthest apart circumferentially define the extent of movement of the bearings in the slots 32 by mutual engagement with the ends of the slots when the seat section moves relative to the base section of the chair.
- Hollow pocket members 94 are provided on the respective inward facing sides of the side panels 80 for receiving the rounded ends 96 of the respective mounting brackets when the seat section is lowered. The pocket members 94 thus prevent movement of the ends of the brackets 90 against soft upholstered fabric above the seat frame 28 and on the inward facing sides of the chair in the finished upholstered chair.
- the single rear panel 31 of the base section shown in the previous arrangements of Figures 1 to 21 is replaced by a two-part panel 31 ' comprising a fixed lower panel 98 and a movable slideable panel 100.
- the lower panel 98 is fixed and extends between the rear ends of the side panels 18 as before, but extends only part way up the rear of the base between the side panels 18, approximately just over half way up.
- the other panel 100 is slideably mounted in runners 102 in the form of metal open section channels fixed at the end of the base to the inward facing surface of respective side panels 18, forward of and immediately adjacent to the lower fixed rear panel 98.
- the panel 100 is thus slideable in the respective channels 102 between a raised position, as shown in the drawings of Figures 22 to 26, when the seat section is raised, and a lowered position when the seat section is lowered and the chair returned to its normal upright configuration.
- the panels 98 and 100 overlap so that the rear of the chair is closed in all positions of the chair.
- the slideable panel 100 co-operates with the fixed rear panel 82 of the seat section so that there is no gap between the seat section and the base at the rear of the chair throughout the range of adjustment of the chair. Movement of the panel 100 is co-ordinated with the movement of the seat section relative to the base so that there is no interference between the panels 82 and 100 as the configuration of the chair is adjusted.
- This co-ordinated movement may be provided by a connection, such as a strap or the like (not shown) between the panel 100 and part of the seat section so that the strap or like element acts as a hoist to raise the panel 100 in the channels 102 as the seat section is raised towards the fully raised position shown in the drawings of Figures 22 to 26., with the panel being lowered under gravity, for example, when the seat section is lowered.
- a connection such as a strap or the like (not shown) between the panel 100 and part of the seat section so that the strap or like element acts as a hoist to raise the panel 100 in the channels 102 as the seat section is raised towards the fully raised position shown in the drawings of Figures 22 to 26., with the panel being lowered under gravity, for example, when the seat section is lowered.
- the pivot mounting arrangement 60 of the previous embodiments is replaced by a modified mounting arrangement 60'.
- the pivot mounting arrangement 60' is preferably of metal construction and comprises: a tubular cross-member 50' which extends across the width of the chair at the bottom of the backrest frame 40, with ends of the cross-member 50 disposed on respective lateral sides of the chair; a pair of pivot mounting brackets 62' disposed at the rear of the seat section on the inward facing sides of the side panels 80, adjacent respective left and right hand rear corners of the seat frame 28; a pair of lever arms 52' which extend from the respective ends of the cross member 50' to the pivot point 44' where they are mounted on respective pivot pins 64' carried by the respective brackets 62'.
- the lever arms are cranked at the pivot point 44' to provide an engagement arm 104; and an abutment stop in the form of a pin 106 provided on each of the pivot mounting brackets 62' to limit the extent of upwards pivotal movement of the lever arms by engagement of the arms 104 with the respective pins 106 when the backrest is returned from a lowered or inclined position to its upright position, and subsequently as the seat section is raised in relation to the base section during lifting.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Chairs Characterized By Structure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201317259A GB201317259D0 (en) | 2013-09-30 | 2013-09-30 | Lift-recliner chair |
PCT/GB2014/000385 WO2015044632A2 (en) | 2013-09-30 | 2014-09-29 | Lift-recliner chair |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3051979A2 true EP3051979A2 (en) | 2016-08-10 |
EP3051979B1 EP3051979B1 (en) | 2019-04-10 |
Family
ID=49585039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14790245.6A Active EP3051979B1 (en) | 2013-09-30 | 2014-09-29 | Lift-recliner chair |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3051979B1 (en) |
CN (1) | CN105705062B (en) |
GB (3) | GB201317259D0 (en) |
WO (1) | WO2015044632A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201015084D0 (en) * | 2010-09-09 | 2010-10-27 | Integrated Furniture Technologies Ltd | Lift-recliner chair |
IT201600097377A1 (en) * | 2016-09-28 | 2018-03-28 | Tenacta Group Spa | Reclining electric chair with protection |
SE542449C2 (en) * | 2017-03-31 | 2020-05-05 | Permobil Ab | Tilt assembly for a powered wheelchair and a powered wheelchair comprising the same |
WO2018212987A1 (en) * | 2017-05-15 | 2018-11-22 | L&P Property Management Company | Modular assembly for high leg row seating |
CN107041643B (en) * | 2017-05-25 | 2022-02-18 | 埃利奥·拉瓦约利 | Moving device for moving part of deck chair or sofa |
EP3668355A4 (en) * | 2017-08-14 | 2021-05-19 | Frederick Jacobs | Powered chairs for public venues, assemblies for use in powered chairs, and components for use in assemblies for use in powered chairs |
GB201813009D0 (en) * | 2018-08-09 | 2018-09-26 | Eevolv Ltd | A drive mechanism |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2108466A (en) * | 1981-10-27 | 1983-05-18 | Robert Edward Hargreaves | Vertically-adjustable chair |
US4946222A (en) * | 1989-01-30 | 1990-08-07 | Triangle Engineering Of Arkansas, Inc. | Lift platform for chairs |
FR2724299B1 (en) * | 1994-09-13 | 1996-12-27 | Nicault Robert | SEAT WITH AN INTEGRATED VERTICALIZATION DEVICE |
GB0325358D0 (en) * | 2003-10-30 | 2003-12-03 | Peter Cook Internat Plc | Powered furniture |
US7455360B2 (en) * | 2006-04-21 | 2008-11-25 | L & P Property Management | Seating furniture with lift mechanism |
GB0918685D0 (en) * | 2009-10-23 | 2009-12-09 | Integrated Furniture Technolog | Adjustable furniture |
CN201591327U (en) * | 2010-01-04 | 2010-09-29 | 财团法人自行车暨健康科技工业研究发展中心 | Electric lifting seat |
DE102010014126B4 (en) * | 2010-04-07 | 2011-11-10 | Ferdinand Lusch Gmbh & Co. Kg | Seating furniture with a seat pivotable in a standing-up assistance position |
CN201787022U (en) * | 2010-09-03 | 2011-04-06 | 模帝科电子科技股份有限公司 | Fine adjustment structure of actuating device |
GB201015084D0 (en) * | 2010-09-09 | 2010-10-27 | Integrated Furniture Technologies Ltd | Lift-recliner chair |
US8915544B2 (en) * | 2011-08-26 | 2014-12-23 | La-Z-Boy Incorporated | Furniture member with mechanism for powered occupant lift |
-
2013
- 2013-09-30 GB GB201317259A patent/GB201317259D0/en not_active Ceased
-
2014
- 2014-09-29 GB GB1417108.6A patent/GB2520813A/en not_active Withdrawn
- 2014-09-29 EP EP14790245.6A patent/EP3051979B1/en active Active
- 2014-09-29 WO PCT/GB2014/000385 patent/WO2015044632A2/en active Application Filing
- 2014-09-29 GB GB1417107.8A patent/GB2520812B/en active Active
- 2014-09-29 CN CN201480061622.3A patent/CN105705062B/en active Active
Also Published As
Publication number | Publication date |
---|---|
GB2520812A (en) | 2015-06-03 |
EP3051979B1 (en) | 2019-04-10 |
GB201417107D0 (en) | 2014-11-12 |
GB201417108D0 (en) | 2014-11-12 |
WO2015044632A3 (en) | 2015-05-14 |
GB2520812B (en) | 2018-05-16 |
CN105705062A (en) | 2016-06-22 |
GB201317259D0 (en) | 2013-11-13 |
WO2015044632A2 (en) | 2015-04-02 |
GB2520813A (en) | 2015-06-03 |
CN105705062B (en) | 2020-03-13 |
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