EP2777672B1 - Support de patient - Google Patents

Support de patient Download PDF

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Publication number
EP2777672B1
EP2777672B1 EP13305302.5A EP13305302A EP2777672B1 EP 2777672 B1 EP2777672 B1 EP 2777672B1 EP 13305302 A EP13305302 A EP 13305302A EP 2777672 B1 EP2777672 B1 EP 2777672B1
Authority
EP
European Patent Office
Prior art keywords
frame
spring
stabiliser
actuator
support
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.)
Not-in-force
Application number
EP13305302.5A
Other languages
German (de)
English (en)
Other versions
EP2777672A1 (fr
Inventor
Eddy Kerzerho
Pascal Lemonnier
Etienne Yvernault
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hill Rom SAS
Original Assignee
Hill Rom SAS
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Filing date
Publication date
Application filed by Hill Rom SAS filed Critical Hill Rom SAS
Priority to EP13305302.5A priority Critical patent/EP2777672B1/fr
Publication of EP2777672A1 publication Critical patent/EP2777672A1/fr
Application granted granted Critical
Publication of EP2777672B1 publication Critical patent/EP2777672B1/fr
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Classifications

    • 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
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/012—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame
    • 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
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/018—Control or drive mechanisms
    • 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
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/015—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame divided into different adjustable sections, e.g. for Gatch position

Definitions

  • the present application is concerned with person support apparatus, such as a bed, and with apparatus having a deck and a deck lift system.
  • Many person support apparatus such as hospitals and long-term care (LTC) beds, include a deck and a person support surface or element such as a mattress, supported by the deck. Such beds may also include side rails.
  • LTC long-term care
  • lifting systems often including an hydraulic actuator
  • the known arrangements for raising and lowering a person support surface include arrangements in which an hydraulic actuator is coupled to a pivotable supporting structure or leg and the controlled extension of the hydraulic actuator raises the deck surface whereas the controlled retraction of the hydraulic actuator lowers the deck surface by causing deck supporting frame or legs to fold, respectively, away from and towards the underside of the deck.
  • a problem with the known arrangements is that when the deck is in its lowermost position with the supporting structure folded into the underside of the bed, the hydraulic actuator is also folded into the underside of the bed and almost parallel to the deck and therefore perpendicular to the direction in which it must exert a lifting force to counteract gravity and raise the deck and person on the deck.
  • a very high power actuator is (or a number of actuators acting in parallel are) required so that it can provide a force having a sufficiently strong vertical component in the vertical direction to overcome the force of gravity acting on the weight of the bed and anyone supported within the bed.
  • Such high power actuators are relatively expensive and/or bulky, and of course doubling up actuators would also increase costs.
  • a known LTC bed with articulated legs controllably foldable using hydraulic actuators is the Volker 5380 low-height healthcare bed sold by Volker Healthcare (GB) Limited.
  • US 6,473,922 describes a system for the kinematic motion of an articulated bed which uses a defined bed and support structure geometry to reduce the force necessary to start the legs in motion to raise the bed.
  • US 6,405,393 describes a height and angle adjustable bed with a support arm mechanism which provides an initial assist force when the bed is in a nearly or fully lowered position P/69604.EP01 and thereby minimises the force required by the linear actuators used to raise the bed.
  • the arrangement of US 6,405,393 includes a compression spring mounted on the support arm adjacent its connection to the bed, to and which moves with the support arm, and engaged by the support arm when the support arm and spring are near the horizontal.
  • the arrangement of US 6,405,393 is complicated, prone to failure, requires a powerful spring and presents an entrapment risk for fingers and other body parts. It also cannot be used with a raising and lowering mechanism in which the bottom of the support arm does not move as the bed is raised and lowered.
  • a patient support comprising a frame which supports a deck or upper platform.
  • the patient support additionally includes a support structure for supporting the frame, the support structure including at least one support element having an upper portion pivotably coupled to the frame at an upper support element pivot and at least one actuator, in this case a row of springs, configured to move between a first and a second position to controllably pivot the support element relative to the frame.
  • the support element pivots such that the frame moves between a first uppermost raised position and a second lowermost lowered position wherein the support element subtends a smaller angle relative to the frame in the second lowered position that when it is in the first raised position.
  • This patient support also includes an energy storage mechanism, in this case a spring, for storing energy as the frame is lowered, and for using that stored energy as the frame is raised.
  • the present invention provides a patient support as defined in claim 1 to which reference should now be made.
  • a hospital bed 1 embodying the invention includes a deck 2 for supporting a mattress or other patient support element.
  • the sides of the deck include retaining loops 3 to hold the mattress in position.
  • the deck is divided into four sections 4, 5, 6, 7. Three of these 4, 5, 7 are articulated and can be moved by a controller (under the command of the care giver or patient) so as to move the patient support surface between lying down (see figure 2 ) and various seating (see figure 3 ) configurations.
  • Articulated beds with a controllable articulation system for the patient support surface are known and not a novel or inventive part of the subject invention so will not be described in detail.
  • the hospital bed includes a headboard 8 at a first end and a footboard 9 at a second end.
  • the deck 2 is supported on a base frame 10 to which the head 8 and foot boards 9 are mounted.
  • the sections 4, 5, 7 of the deck may articulate and move relative to that base frame 10 to take up possible alternative configurations in the known manner (see figures 1 and 3 for examples of alternative deck configurations).
  • the base frame 10 has two leg or support structures 11 pivotally coupled to its under surface 12.
  • Each leg structure includes a pair of legs 13 each coupled to the base frame 10 by a moveable upper pivot 14 at their deck or upper end.
  • the moveable upper pivots 14 can move parallel to the longitudinal axis of the deck and frame (for example, the moveable upper pivot of the left-hand leg in figure 2 can move in the direction shown by arrow B in figure 2 ).
  • the legs of each pair of legs are connected together by lower and upper bracing cross-elements 15, 16 at, respectively, the bottom of the legs and at a point of the legs near their mid-points.
  • the lower bracing cross-elements 15 are coupled to wheel arrangements 17 for engaging a floor surface, and are connected to the bottoms of their respective legs by lower leg pivots 18 so that they (and the wheels they support) may pivot relative to the respect leg pairs as the legs pivot and the patient support surface is raised and lowered.
  • the lower ends of the legs they may be connected to a support frame which itself has wheels.
  • the legs or support frame may omit the wheels.
  • the upper bracing cross-elements 16 are each pivotally connected to a pair of stabiliser elements 19.
  • the stabiliser elements 19, which are each coupled to a leg, are pivotally connected at their first upper ends to the underside of the deck at a fixed upper pivot 20 displaced from the leg upper moveable pivot 19 of the respective leg 13, and are pivotally connected at their second lower ends to the respective pairs of legs at a pair of respective lower stabiliser pivots 21.
  • Each of the two upper cross-bracing elements 16 is pivotally connected to a respective pair of stabilisers (and an actuator 22) at actuator pivots 23 on the stabiliser elements.
  • Each stabiliser element has a slight kink or bend in its length at the stabiliser portion adjacent the actuator pivot 23. The kink or bend in the stabiliser is to allow room for the cross bars on the underside of the frame i.e. as the legs are moved up alongside the frame (see Figure 7 ).
  • An actuator-stabiliser yoke 29 or connection piece is pivotally coupled at a first end to the actuator pivot 23 and thence to the respective upper cross-bracing element 16 and thence indirectly coupled to a respective pair of stabiliser elements 19.
  • the actuator-stabiliser yoke 29 is pivotally coupled to an end 25 of an actuator 22 (which may be a hydraulic rod actuator) such that the actuator controllably extends and retracts a rod 26.
  • Extension and retraction of the actuator rod 26 causes the respective stabiliser 19 to rotate and hence the leg 13 to rotate relative to the deck 2 and hence raises or lowers the base frame 10 and the patient support surface on the base frame.
  • the actuators 22 may be controlled by either the patient or a care-giver.
  • Control mechanisms for such actuators are well known and may be either a foot operated pedal, a control panel on the side of the bed, remote control or other control mechanism.
  • Suitable actuators are well known and are therefore not described in detail in this application. They may be hydraulic, electric, or pneumatic.
  • the bed also includes resilient spring assist elements 27 located in the base frame for engaging the support structure ensemble comprising the stabilisers, actuator-stabiliser yoke and actuator rod as the base frame 10 moves towards and is in its lowermost position (see figures 5 and 6 ).
  • resilient spring assist elements 27 located in the base frame for engaging the support structure ensemble comprising the stabilisers, actuator-stabiliser yoke and actuator rod as the base frame 10 moves towards and is in its lowermost position (see figures 5 and 6 ).
  • it is the surface of the respective upper bracing element 16 which engages the spring assist element 27 as the bed is lowered to its lowermost position.
  • it may be any surface of the support structure which moves up towards the patient support surface as the patient support surface is lowered, and moved downwards away there from as the patient support surface is raised.
  • Each resilient spring assist element 27 includes (see figure 7 ) a housing 28 for attachment to a side or longitudinal portion of to the base frame 10, or some other part if the patient support surface towards which the leg structures move on the bed is lowered (and move away from as the bed is raised) using screws.
  • the spring assist elements 27 may be located anywhere on the frame 10 or bed 1 where they engage and interact with a surface of the support or leg structure 11 as this is pivoted up into the underside of the bed and the bed is lowered into its lowermost position.
  • a pair of compression springs 30 are located within the housing 28 and their upper ends engage a downwardly facing inner surface 31 in the top of the respective housing 28 (see Figures 7 to 10d ).
  • the lower ends of the compression springs 30 engage an upwardly facing inner surface 32 in an engagement member or bolt 33.
  • the bolt-like engagement member 33 includes a screw or guide element 34 which runs in a guide 35 in the housing 28.
  • the engagement member 33 is biased by the compression springs to extend from the housing by the springs (see figure 8 ) when it is not engaged and being pushed back into the housing. If a force sufficient to overcome the springs is exerted upwardly on the biased engagement member, it can be pushed back into the housing (see figure 9 ).
  • the two spring assist elements 27 store energy in the compressed oil springs 30 when these have been biased by the weight of the bed and are in their lowermost position as shown in figure 7 .
  • the force exerted by the compressed springs acts against the weight of the bed and thereby effectively reduces the weight which the actuator must overcome when raising the base frame from its lowermost position.
  • Figure 11 shows an example of what the actuator force would have to be to raise a bed from its lowermost to its uppermost position at the various heights it must go through. It shows that the force necessary as it is first lifted form the lowermost position is a high one.
  • Figure 12 shows how adding in the two spring assist elements described above significantly reduces the initial force required. The example of Figure 11 allows one to achieve this with an actuator which need not produce a force of greater than 6000N. The calculations used to create the examples of Figures 11 and 12 were based on a maximum weight on the bed of 230kg which requires a maximum lifting force of about 8500N.
  • the springs used in the example of Figure 12 were coil springs with reference D12670 from the Associated Spring Spec catalog with the properties set out below: LIFT SPRING PARAMETER VALUE UNITS OUTSIDE DIAMETER (OD) 14.50 mm WIRE DIAMETER (d) 2.00 mm FREE LENGTH (FL) 49.50 mm LOAD LENGTH (L1) 23.50 mm SOLID HEIGHT (SH) 21.00 mm LOAD (P) at L1 254 N SPRING RATE (k) 9.81 N/mm MATERIAL MUSIC WIRE --- END CONDITION SQUARED AND GROUND ---
  • the embodiment of the invention described above uses a compression spring. Any arrangement which stores energy as it is compressed and then releases it as it then relaxes is suitable.

Claims (12)

  1. Support de patient (1) comprenant :
    un cadre (10) ;
    un plateau (2) supporté par le cadre (10) ;
    une structure de support pour supporter le cadre (10), la structure de support comprenant au moins un élément de support (11) ayant une partie supérieure raccordée en pivotement au cadre (10) au niveau d'un pivot d'élément de support supérieur (14) et au moins un actionneur (22) configuré pour se déplacer entre une première et une seconde position, de façon à faire pivoter de manière contrôlable l'élément de support (11) par rapport au cadre (10) entre une première position levée au maximum et une seconde position baissée au maximum, dans lequel l'élément de support (11) sous-tend un angle inférieur par rapport au cadre (10) dans la seconde position baissée par rapport à celui dans la première position levée ;
    un mécanisme de stockage d'énergie (27) pour stocker l'énergie quand le cadre (10) est baissé et pour utiliser cette énergie stockée quand le cadre (10) est levé ;
    dans lequel
    le mécanisme de stockage d'énergie (27) comprend un dispositif à ressort situé sur le cadre (10) et ayant une surface de ressort résiliente orientée vers le bas (36), le support de patient (1) comprenant une surface de mise en prise à ressort orientée vers le haut (16) qui se déplace avec l'élément de support (11) et dans lequel la surface de mise en prise à ressort (16) entre en contact avec la surface à ressort (36) quand le cadre (10) s'approche de sa position la plus basse et l'atteint pour comprimer ainsi le dispositif à ressort (27) quand le cadre (10) est baissé dans sa position la plus basse, et dans lequel le ressort comprimé (30) agit de façon à pousser la surface à ressort (36) contre la surface de mise en prise à ressort (16) quand le cadre est levé loin de la seconde position baissée au maximum.
  2. Support de patient selon la revendication 1 dans lequel la surface à ressort orientée vers le bas (35) est sensiblement horizontale.
  3. Support de patient selon l'une quelconque des revendications précédentes, dans lequel le dispositif à ressort (27) est un dispositif à ressort de compression.
  4. Support de patient selon l'une quelconque des revendications précédentes, dans lequel le mécanisme de stockage d'énergie (27) comprend un logement (28) ayant une première surface interne (31), un élément à boulon (33) se projetant depuis le logement (28) et coulissant par rapport à celui-ci et un ressort de compression (30) ayant une première extrémité contre la première surface interne (31) et une seconde extrémité contre l'élément de boulon (33) de sorte que le ressort (30) polarise le boulon (33) pour qu'il s'étende depuis le logement (28) et mette en prise la surface de mise en prise à ressort (16) quand le cadre (10) s'approche de sa position la plus basse et l'atteint.
  5. Support de patient selon l'une quelconque des revendications précédentes, dans lequel l'actionneur (22) comprend un élément mobile (25) ayant une première extrémité raccordée en pivotement à l'élément de support (11), l'actionneur d'élément mobile d'actionneur pouvant être étendu de manière contrôlable et rétractable pour faire pivoter l'élément de support (11) par rapport au cadre (10) entre la première position levée au maximum et la seconde position baissée au maximum.
  6. Support de patient selon la revendication 5 dans lequel l'élément de support (11) comprend un élément stabilisateur (19), une partie inférieure du stabilisateur étant raccordée en pivotement à une partie intermédiaire de l'élément de support (11) au niveau d'un pivot de stabilisateur inférieur (21) et la partie supérieure de l'élément stabilisateur étant raccordée en pivotement au cadre (10) au niveau d'un pivot de stabilisateur supérieur (20).
  7. Support de patient selon l'une quelconque des revendications précédentes, dans lequel l'élément mobile de l'actionneur (25) est raccordé à une partie du stabilisateur (19) proche de l'élément de support (11).
  8. Support de patient selon la revendication 7, dans lequel l'actionneur (22) et le stabilisateur (19) sont raccordés par un élément de connexion (29), une première partie de l'élément de connexion étant raccordée en pivotement au stabilisateur (19) et une seconde partie étant raccordée en pivotement à l'élément mobile d'actionneur (25).
  9. Support de patient selon l'une quelconque des revendications précédentes, dans lequel le pivot d'élément de support supérieur (14) est mobile dans une direction parallèle à l'axe longitudinal de l'élément de support (11).
  10. Support de patient selon la revendication 6 et la revendication 9, dans lequel le pivot de stabilisateur supérieur (14) est dans une position fixe sur le cadre (10).
  11. Support de patient selon l'une quelconque des revendications précédentes, dans lequel la structure de support (11) comprend deux éléments de support (19) raccordés par au moins un élément d'entretoisement (16) et dans lequel une partie de l'élément d'entretoisement est la surface de mise en prise à ressort (16).
  12. Support de patient selon la revendication 11 et l'une quelconque des revendications 7 ou 8, dans lequel l'élément mobile d'actionneur (25) est raccordé en pivotement à l'élément d'entretoisement (16), et l'élément d'entretoisement (16) est raccordé en pivotement aux deux stabilisateurs (19), au niveau d'une partie des deux stabilisateurs (19) proche de leur pivot stabilisateur inférieur respectif (21).
EP13305302.5A 2013-03-15 2013-03-15 Support de patient Not-in-force EP2777672B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13305302.5A EP2777672B1 (fr) 2013-03-15 2013-03-15 Support de patient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13305302.5A EP2777672B1 (fr) 2013-03-15 2013-03-15 Support de patient

Publications (2)

Publication Number Publication Date
EP2777672A1 EP2777672A1 (fr) 2014-09-17
EP2777672B1 true EP2777672B1 (fr) 2016-11-23

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Application Number Title Priority Date Filing Date
EP13305302.5A Not-in-force EP2777672B1 (fr) 2013-03-15 2013-03-15 Support de patient

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10489661B1 (en) 2016-03-08 2019-11-26 Ocuvera LLC Medical environment monitoring system
US10600204B1 (en) 2016-12-28 2020-03-24 Ocuvera Medical environment bedsore detection and prevention system
US20210177679A1 (en) * 2019-12-16 2021-06-17 Stryker Corporation Patient support with lift assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6353824B2 (ja) * 2015-12-02 2018-07-04 フランスベッド株式会社 昇降用駆動装置及びベッド装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6473922B1 (en) 1999-09-15 2002-11-05 Sunrise Medical Hhg Inc. Kinematic motion of articulated bed
US6405393B2 (en) 2000-05-01 2002-06-18 Michael W. Megown Height and angle adjustable bed having a rolling base
WO2002026187A2 (fr) * 2000-09-29 2002-04-04 Carroll Intelli Corp. Lit reglable en hauteur et systeme automatique de stabilisation des pieds
MXPA04004529A (es) * 2004-05-13 2004-10-25 Javier Elizondo Quintanil Adan Estructura inferior desplazable para camas.
WO2012066580A2 (fr) * 2010-11-19 2012-05-24 Sundaram Medical Devices (P) Ltd Lit d'hôpital

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10489661B1 (en) 2016-03-08 2019-11-26 Ocuvera LLC Medical environment monitoring system
US10600204B1 (en) 2016-12-28 2020-03-24 Ocuvera Medical environment bedsore detection and prevention system
US20210177679A1 (en) * 2019-12-16 2021-06-17 Stryker Corporation Patient support with lift assembly

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