Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
  • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
  • B66F7/22—Lifting frames, e.g. for lifting vehicles; Platform lifts with tiltable platforms
• • 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
• • 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 invention relates to a device for generating a relative motion between two components or parts which are arranged movable rela- tive to one another, comprising a means provided at and being movable relative to a first component or part, a transmission device inter ⁇ connecting said movable means and a second component or part and means for displacing the means and further the second component or part rela ⁇ tive to the first component or part due to the transmission device.
• a device for generating a relative motion between two components or parts which are arranged movable rela- tive to one another comprising a means provided at and being movable relative to a first component or part, a transmission device inter ⁇ connecting said movable means and a second component or part and means for displacing the means and further the second component or part rela ⁇ tive to the first component or part due to the transmission device.
• Devices of the above described type are used within a wide variety of technical fields, e.g. different types of lift-bridges for automo ⁇ biles
• a device of this type may even be used for raising or lowering a back-supporting device, which device consequently constitutes one of the components or parts of a bed, preferably adapted to individu- als of reduced capability of rising to an upright position.
• the first component or part is constituted by the frame of the bed or a component positioned on top of the bed and kept substantially stationary relative thereto.
• the object of the present invention is to provide a device which can be used for eliminating the above-described disadvantages of the prior art back-supporting devices and which in an efficient way may be used within many different fields of application within which it is de ⁇ sirable to generate a movement between two components or parts relative to one another in the manner described above.
• This object is obtained by means of a device of the type described above and provided with the characteristics defined in the character ⁇ izing part of the appended Claim 1.
• the transmission device Due to the structure of the transmission device according to the present invention, it is rendered possible in a simple manner to obtain excellent levering conditions in connection with the transmission de ⁇ vice.
• the first element is adapted to, during its swinging, abut and actuate the second component or part for causing the second component or part to move relative to the first component or part during an initial phase, a highly efficient initial impact to or actuation of the second component or part is obtained. Consequently, the first element is easily constructed in each specific instance in the most advantageous way.
• the transmission device reaches the condition according to the second phase, and the first and the second element are functioning as a single integral component interconnecting the movable means and the second component or part, and consequently transmit the forces originating from the movement of the first component or part to the second component or part.
• the power-generating means may in accordance with the device according to the present invention preferably be positioned below the second component or part, provided the device constitutes a back- supporting device, a lift-bridge or the like, so that the power-gene ⁇ rating means is not constituting an obstacle relative to individuals or persons walking or moving around the device, or walls, furniture or the like.
• the second element is, relative to a rotational centre, rotatably connected to the second component or part.
• a second component or part is swingably or rotatably connected to the first component or part, and the movable means is adapted to, during its movement from the initiation of the first phase, move towards the rotational centre between the two parts or components and by means of the transmission device generate an upward rotation or swinging of the second component or part relative to the first component or part.
• a device comprising this characteristic or feature constitutes an example of an extremely well-functioning back-supporting device in which a second element is implemented as the back-support and by means of which device the above-defined object is obtained.
• FIG. 1 is a perspective view of a device according to the present invention implemented as a back-supporting device in a position in its second phase
• Fig. 2 is an elevational view of the device shown in Fig. 1 in a position prior to initiating the first phase
• Fig. 3 is an elevational and partly broken away view of the device in a position during the first phase
• Fig. 4 is an elevational and partly broken away view of the device in a transition position between the first and the second phase
• Fig. 5 is an elevational view of the device in a position in the second phase.
• a preferred embodiment of a device according to the pre ⁇ sent invention is shown, constituting a back-supporting device 1 which is universally applicable in connection with beds and is shiftable be ⁇ tween different beds.
• the device comprises a first component or part 2 including a plate 3 of a width substantially identical to the width of a conventional bed, which plate is adapted to be positioned on a bed so that a first end 4 of the plate is positioned at the head of the bed.
• the plate 3 is undercut at this end so that a part of the outermost end of the plate may be pushed through and past the bed head, so that the device is positioned properly and safely.
• a bar 6 is fastened to the plate which bar is preferably a hollow bar.
• the bar 6 extends substantially perpendicular to the longitudinal direction of the bed as the device is applied to the bed.
• a U-shaped bar 7 is arranged having its legs ex ⁇ tending upwardly from the plate 3.
• the U-shaped bars 7 extend substanti ⁇ ally parallel relative to one another and perpendicular to the bar 6.
• a power-generating means 8 constituted by a thread ⁇ ed cylinder driven by an electric motor 9 is provided.
• One end of the threaded cylinder is connected to a collar 10 arranged at the first end 4 of the plate 3 which collar constitutes an L-shaped bar.
• the electric motor 9 is adapted to generate rotation of a longitudinally extending threaded shaft 11 of the threaded cylinder.
• a nut 13 (vide Fig. 4) is arranged cooperating with the threaded shaft 11.
• the nut 13 is arranged inrotational within the casing 12 which has a substantially square section so that the nut is displaced along the shaft 11 with which the nut meshes as the shaft 11 is rotated.
• the casing 12 is provided with a longitudinal upwardly facing opening 14, through which the nut 13 is rigidly connected with a plate 16 which is movable relative to a top wall 15 of the casing 12.
• a bar 17 is ri ⁇ gidly connected to the plate 16 which bar is arranged substantially per- pendicular to the threaded shaft 11 and extends substantially parallel with the bar 6. The bar 17 extends to a position adjacent to both U- shaped bars 7.
• a respective slide block 18 Adjacent to each end of the bar 17 a respective slide block 18 is fixed to the bar 17 and arranged so as to be received in a respective U-shaped bar 17 in frictional cooperation therewith and with low clearance.
• the electric motor 9 causes the threaded shaft 11 to rotate, the nut 13 is shifted along the threaded shaft and the bar 17 is, consequently, shifted or moved in a first or second direction by the shaft 11 and controlled by the slide blocks 18 which are received within the U-shaped bars 7 which function as guiding means. Since the slide blocks 18 are positioned behind the bar 17, the slide blocks 18 are hauled or pulled by means of the bar as the second component or part is swung upwardly, and any risk of tilting the slide blocks within the U- shaped bars is consequently minimized.
• the device 1 further comprises a second component or part 19 con ⁇ stituted by a rectangular frame having an open side at which each leg of the frame is rotatably connected to the bar 6 relative to a rotational axis which is substantially parallel with the bar 6.
• a surface element such as a cloth, is tensioned between the legs of the frame, which cloth is not shown in the drawings and which serves the purpose of providing support for the head or the back of a person resting on the bed which is equipped with the back-supporting device.
• the frame 19 attempts due to exposure to the gravitational force to rotate relative to its rotational centre at the bar 6 downwardly towards the plate 3 and consequently the bottom of the bed.
• the frame 19 is kept in a desired position by means of the power-generating means 8 relative to the plate 3 comprising the first component or part and consequently the remaining portion or part of the bottom of the bed on which the device is arranged.
• This effect is due to the fact that the transmission device 21 is adapted to connect the bar 17 and consequently the power- generating means 8 and the frame 19.
• a fixture 22 is fixated extending rearwards from the bar 17 in the direc ⁇ tion of displacement of the bar 17 towards to rotational centre 20.
• a first element 24 constituted by a rigid platelike link of the transmission device is at its one end 25 rotatably fixed to the fixture 22 relative to a rotational axis substantially parallel with the rotational axis of the frame 19.
• a second element 26 constituted by an elongated rigid link is at its one end rotatably connected to the first element relative to a rotational axis substantially parallel with the rotational axis of the first element at the fixture.
• the second ele ⁇ ment is at its opposite end rotatably connected to the frame 19 relative to a rotational centre 27 positioned in the intermediate region of the respective frame leg.
• the rotational axis of the rotational centre 27 is substantially parallel with the rotational axis of the frame.
• the first element 24 is provided with a shelf-like protrusion 28 which is rigidly fixed to the element 24 in the vicinity of the rotational centre 29 be ⁇ tween the first and the second element.
• the second element 26 Due to the presence of the pro ⁇ trusion 28, the second element 26 is limited as to its rotational capa ⁇ bility relative to the first element, as the second element after a cer ⁇ tain relative rotation between both elements abuts the protrusion 28 which consequently prevents any further relative rotation between the two elements.
• the plate-like first element 24 is basically shaped like a oblique parallelogram in which the rotational centre 23 is positioned in one of the points of the parallelogram and in which a rotatably mounted roll 30 is positioned in the other point of the parallelogram.
• the rotational centre 29 between the first and the second element is positioned along the long side of the parallelogram, which long side extends to the point of the parallelogram, in which point the roll is positioned. Consequent ⁇ ly, in the position shown in Fig.
• the rotational centre 23 of the first element is positioned at the fixture 22 at a substantial distance perpendicular to the direction of the threaded shaft 11 from a line in ⁇ terconnecting the rotational centre 29 of the first element relative to the second element 26 and the rotational centre 27 of the second element relative to the frame 19.
• the distance is substanti- ally identical to the distance between the two long sides of the pa ⁇ rallelogram constituted by the first element.
• Fig. 2 illustrates the position in which the back- supporting device 1 is totally lowered and in which the different rota- tional centres are positioned substantially along a line in the follow ⁇ ing sequential order 20, 27, 29, and 23. From this position, a first phase of the elevation of the second part 19 relative to the first part 22 begins, as the electric motor 9 causes the shaft 11 to rotate, where ⁇ by the bar 17 is moved towards the bar 6. Due to the fact that the above-mentioned line is positioned above the rotational centre 23 of the first element at the fixture 22 of the bar 17, the first element 24 is caused to swing upwardly, i.e. in Fig. 2 caused to swing clockwise rela ⁇ tive to the bar 17.
• the roller 30 By raising the first element 23, the roller 30 lifts the frame 19 which roller 30 abuts the lower side surface of the frame 19, as the roller rolls along the lower side surface of the frame, so that the frame is rotated relative to the rotational centre 20 and relative to the first component or part.
• the second element By the upward swinging or rotation of the first element, the second element is caused to swing relative to the ro ⁇ tational centre 27 as well as the rotational centre 29.
• Fig. 3 illu- strates this position.
• Fig. 4 illustrates this position.
• the device is shifting to a different or second phase in which the second element no longer rotates or swings relative to the first element.
• the continuous displacement of the bar 17 towards the bar 6, the first ele ⁇ ment and the second element function as a single rigid component which rotates or swings relative to the rotational centre 23, in Figs. 4 and 5 in a clockwise direction, for lifting or elevating the second component or part 19 by the influence from the second element through the rotatio ⁇ nal centre 27.
• the roller 30 is consequently disengaged from its abut ⁇ ting contact with the frame 19 and hands over the elevation or raising function to the rigid component constituted by the two elements.
• the second component or part is directly influenced or actuated upon from the first element at a point positioned at a long distance from the ro ⁇ tational centre 20 of the second part, so that no unproportionally strong forces are required for lifting the second part.
• the transmission of power to the second component or part is shifted to the point in which the second element is connected to the second component or part, i.e.
• the two phases are, of course, reversed during lowering the support from an elevated position in which lowering the elements are shifted from operating as a single rigid element at the end of the second phase to become mutually rotatable.
• the power-generating means employ- ed at the area directly beneath the second component or part, i.e. the back-support, providing obvious advantages.
• the U-shaped bars 7 may in connection with a back-supporting device be constituted by corresponding guiding means of the frame of the bed itself, so that the bed in this implementation constitutes the first component or part.
• the guiding means may constitute a male as well as a female guiding means.
• the first component or part may, however, have another appropriate shape, e.g. be constituted by the floor of a garage or workshop in case the present invention is applied to some kind of lift-bridge.
• the second component or part need not be directly connected to the first component or part; thus, the second component or part might e.g. be displaceably connected to a different component or part arranged somewhere above the first component or part, and consequently e.g. con ⁇ stitute a platform.
• the second element is defined as being connected to the second component or part which even includes the situa ⁇ tion in which the said element and the said component or part are not rotatable or swingable relative to one another, however, e.g. displace- able relative to one another.
• the power-generating means may, of course, be constituted by a dif- ferent type and even be powered in a manner different from the above described preferred embodiment.
• the power-generating means may be manually operated and connected to a handle.
• the protrusion may be pro ⁇ vided on the second element, and the second stop means may preferably be constituted by a specific structure of the first element.
• the first component or part being a component or part which is substantially fixed relative to the frame - implies that the first component or part may be arranged loosely on top of the frame or a mattress or the like arranged on top of the frame and a support e.g. a bed head or the like so as to block any substantial motion relative to the frame.
• a transmission device may exclusively comprise a first and a second element or more than two compositions thereof. It is further to be mentiond that the components illustrated in the above described embodiments may be modified within the inventive concept as defined in the appended patent claims.

Landscapes

• Health & Medical Sciences (AREA)
• Nursing (AREA)
• General Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Mechanical Engineering (AREA)
• Structural Engineering (AREA)
• Geology (AREA)
• Engineering & Computer Science (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Invalid Beds And Related Equipment (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20381075

Family Applications (1)

Country Status (2)

Cited By (10)

Families Citing this family (1)

Citations (3)

• 1990
  • 1990-12-03 SE SE9003836A patent/SE467872B/sv not_active IP Right Cessation
• 1991
  • 1991-11-28 WO PCT/DK1991/000364 patent/WO1992009520A1/en active Application Filing

Patent Citations (3)

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