Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C7/00—Parts, details, or accessories of chairs or stools
  • A47C7/002—Chair or stool bases
  • A47C7/006—Chair or stool bases with castors
• • 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
  • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
  • A47C1/0303—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable rectilinearly in vertical direction
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C7/00—Parts, details, or accessories of chairs or stools
  • A47C7/36—Supports for the head or the back
  • A47C7/38—Supports for the head or the back for the head, e.g. detachable
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C9/00—Stools for specified purposes
  • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects

Definitions

• the field of the technique is that of ergonomic chairs, designed to make the job to the PC less stressful by the physical point of view because the sitting position, is the most deleterious with regard to the distribution of body weight.
• the Article. 173 of Legislative Decree 81/08. Defines the use of the VDT worker who uses equipment provided with VDT in a systematic and regular for at least 20 hours per week provided for by discounting the breaks. 175 of Legislative Decree no. 81/08 (ie break of fifteen minutes every two hours of continuing to
• the chair is designed to reduce the forces that insist on the hinge of the lumbosacral spine.
• the backrest is changed so as to make physiologically versatile is resting than in the usual sternum-abdominal ( Figure 9).
• the innovation is based on the fact that stationed while sitting, position of support backbone, can lead to an excessive overload of the spine, in particular at the lumbar level.
• F is the force due to the mass weight of the bust multiplied by the acceleration of gravity and A is no more than the area of the cross section of the 1 st sacral vertebra which corresponds to a few square centimeters. On which rest precisely the weight of the trunk and limbs of the skull.
• the architecture of the chair, and in particular of the backrest to provide for the creation of a support surface used annulment of the weight force exerted from the skull and rib cage through a simple technical innovation, namely a backrest that can be used both in a classical and providing the user with a support-abdominal sternum.
• a backrest that can be used both in a classical and providing the user with a support-abdominal sternum.
• the problem of classic chairs is the only way to support your back, to lessen the pressure on the vertebrae above, this does not solve the problem completely but above all you must get away from the desk and unable to continue working on the keyboard pc.
• the chair in case of treatment and / or prevention of pain states, is designed so that it can be turned and used to continue to work in a state of deep relief and comfort, leaning on the backrest the ventral part of the bust, namely from the lower abdomen at the beginning of the sternum and, since equipped with a backrest with adjustable inclination, provide a bearing surface with which cancel the forces admirent on the column, loading it on the wheelchair itself.
• the goal is to provide a structure type cyclist, that is able to support that person, sitting, strenuous efforts for hundreds of kilometers in about 5-6 hours, without suffering from back pain. So, essentially, the backrest (modified in its position, height and consistency) will provide the user a means to download more than the 90% of the pressure at which it is usually subjected the hinge lumbo-sacral, bringing benefits of character psycho and physical, without removing the user from the office work for which it is engaged.
• the design of the chair requires changes to the anatomical fact that totally changes the distribution of the forces that insist on the frame of the chair itself.
• the backrest In the first place the backrest is moved more towards the center line of the chair as close as possible to the cylinder carrier that connects the seat to the legs.
• the rear part of the seat is enlarged to give ergonomically space in the legs, the backrest is also less enveloping, reclining and with a mushroom shape so as to leave space for supporting the thighs of the user (Figure 6), the supports arms detached from the seat and fitted with a mechanical structure able to rotate them by 180 degrees (figure 2), is also mounted on the top of the backrest supports a chin extensible so as to cover the needs for users of different heights.
• the cylinder carrier is constructed with a piston compressed air, combined with 5 feet constructed so as to form a slight curve downwards (figure 8) for shock loads better since the chair, to be convenient, needs to be higher compared to the usual standard.
• F corresponds to the weight of the bust and r is no more than the distance between the pelvic support and the point at which falls the projection of the head height of the seat.
• Figure n ° 1 This figure shows the total redesign of the chair, in so far as, the position of the backrest is definitely moved and the seat tilted, so that, the user can expand the support surface by: the abdominal press, the rib cage, the lower jaw, in a person of average height can amount to about 900 cm 2 instead of cica 10-20 cmq data from the largest lumbar vertebra.
• Figure n ° 2 (d) view from below, which highlights the superposition of the supporting structures with the backrest, important technical measure to avoid an incorrect distribution of the loads when the chairs is used in place innovative; particular from below which shows the ' unusual difference in length between legs and radius of the seat. In addition, the presence of anti-slip rubbers above each wheel.
• Figure n ° 3 the usual position at the desk, here it is possible to note the tilt of the seat base (about 10 °) that allows, once taken the unloading position, the user not to slide backward in order to provide comfortable support of lasting comfort.
• Figure 4 vision from the usual sitting.
• the chair can be used exactly like a standard office chair, but having the peculiarity of being exploited for its innovation when it is needed, in this figure shows the increased surface area of the seat and the apparent concentration of ' insertion of the back, two fundamental measures will allow the user to one session comfortable and safe during the innovative use.
• Figure 5 view from the chair with innovative, showing the enlarged contact surface for the user, to cater to the needs of nature and of postural comfort during sedentary work in a sitting position.
• the first key point to address is the location of the backrest which will be placed more towards the center of the sitting height of about 6-7 cm 43-48 cm.
• the insertion of the backrest has a funnel shape, front perspective, to make room for legs when using the position of sternal support, width 10-15 cm.
• the upper part is rounded and slightly modified to allow the user to be free with his back and move his arms wide and 28-32 cm, the support on the back, it must be perfectly flat, in order to obtain greater versatility ' support and connected at the rear by a vertical elongated structure that puts in communication with the cylinder anatomical backrest carrier, by adjusting the inclination of the first and the second discharging the load of the upper parts of the body so as to increase the efficiency of the chair avoiding sensations of loss of balance.
• the support arms are slightly reclined of about 5 ° -10 °, in anatomical contact exclusively with the backrest and fitted with a mechanism so that it can turn by 180 ° and enjoy a comfortable support during unloading, supporting limbs canceling its weight-force vector length 40-44 cm (Figure 9).
• chin supports extensible 0-15 cm that will provide the total discharge of the skull.
• the supports chin is wide and about 10 cm long and 5 cm well-padded, of semi-elliptical shape, so as to provide a comfortable
• the seat is also constructed so as to allow the user to comfortably accommodate the legs during sitting exhaust.
• the perimeter of the seat is made of concave curves, or the concavity is towards the center of the chair.
• the structure is very important to cushion the load and make the session as highly stable, facing a wider range of structural stress on the support abdominal dates. Should be constructed of metal with a cylindrical piston with compressed air, height cm 40-50 cm, connected with a ring internally provided with teeth which can control the variability of the height and that it can connect the central cylinder at the foot of the chair.
• the cylinder carrier is slightly set back (figure 5) for the presence of a three-lobed structure, mounted under the seat also of metal, so that, with the different length of its 3 lobes, placed in perfect alignment cylinder and backrest carrier, to decrease as much as possible the mechanical moment given by the distance of the projection of the skull at the level of the seat.
• the feet have a structure curves upward to the ground length of 36-38 cm, are provided with wheels and rubber overlying very thick, approximately 0.5 cm from the ground and arranged for the 180 0 of the outer part ( Figure 4 - 8), so as to provide a support for the safety in case of unbalance.
• the material of the structural elements should be made of metal (three-lobed structure, cylinder carrier, feet and wheels) or alternatively carbon fiber, the padding of the seat and backrest can be of any material (synthetic or leather), the important and that are thicker than 3-5 cm above the backrest, by the use massive that the rearrangement of the latter will give.

Landscapes

• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)
• Special Chairs (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=45955908

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (4)

• 2012
  • 2012-01-18 IT IT000001A patent/ITVT20120001A1/it unknown
• 2013
  • 2013-01-17 EP EP13710064.0A patent/EP2840934A1/en not_active Withdrawn
  • 2013-01-17 WO PCT/IT2013/000015 patent/WO2013108282A1/en not_active Ceased

Patent Citations (4)

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