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Patent Searching and Data


Title:
ARTICULATED STRUCTURE TO BE USED FOR MAKING ARMCHAIRS, CHAIRS, SEATS, WHEELCHAIRS FOR THE DISABLED AND OTHER SIMILAR PRODUCTS
Document Type and Number:
WIPO Patent Application WO/2012/152358
Kind Code:
A1
Abstract:
The present invention regards an articulated structure to be used for providing armchairs, chairs, seats, wheelchairs for the disabled and other similar products. It has the function of eliminating tension between the lumbar and dorsal vertebrae and it is of the type which allows the seated person to assume an "overturned N" position which allows the extension of the muscles and of the connected tendons, helps spacing the vertebrae and sooth the intervertebral discs. The entirety occurs respecting the morphology of each seated person. Such articulated structure is characterised in that it comprises a lumbar support (7), having the shape of the lumbar lordosis and moveable vertically, a tilting seat (2), inclinable with an inclination below 90° with respect to the backrest (3) and a step/footrest (5) for conferring to the knees an angle below 90°.

Inventors:
PANCIERA FRANCESCO (IT)
Application Number:
EP2012/001446
Publication Date:
November 15, 2012
Filing Date:
April 02, 2012
Export Citation:
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Assignee:
PANCIERA FRANCESCO (IT)
International Classes:
A47C9/00; A61H1/02; A63B21/068
Foreign References:
US6213923B12001-04-10
US5437609A1995-08-01
DE19958539A12001-06-07
US3878840A1975-04-22
US5437609A1995-08-01
US4688557A1987-08-25
US6213923B12001-04-10
Attorney, Agent or Firm:
BETTELLO, Pietro (Via Col d'Echele 25, Vicenza, IT)
Download PDF:
Claims:
CLAIMS

1. ARTICULATED STRUCTURE TO BE USED FOR MAKING ARMCHAIRS, CHAIRS, SEATS, WHEELCHAIRS FOR THE DISABLED AND OTHER SIMILAR PRODUCTS, having the function of eliminating tension between the lumbar and dorsal vertebrae and it is of the type which allows the seated person to assume an "overturned N" position, which allows the extension of the muscles and of the connected tendons, helps spacing the vertebrae and soothing the intervertebral discs, the entirety respecting the morphology of each seated person, said articulated structure comprising a lumbar support (7) , having the shape of the lumbar lordosis and moveable vertically, a tilting seat (2), inclinable with an angle below 90° with respect to the backrest (3) and a step/footrest (5, 6), for conferring to the knees an angle below 90°, said structure being characterised in that the seated person may assume at least two different "overturned N" configurations, from the more closed one, when there is required a considerable tension of the vertebral column, to the open one, when there is required a rest position, said configurations being made possible after, in the framework (1), the suitable inclination of the seat (2) and the backrest (3), mutually connected through the base frame (4), modifying the support of the feet in the steps (5) or on the footrests (6), thus varying the angle (a) of the knees and the angle (β) of the waist.

2. ARTICULATED STRUCTURE, according to claim 1 , characterised in that it is provided with two under-armpit supports (8) which, exiting in the front part of the backrest( 3) , have the function of supporting the seated body.

3. ARTICULATED STRUCTURE, according to claim 1, characterised in that the lumbar support (7) is constituted by a cushion moveable vertically on the backrest (3) and sufficiently compact for maintaining the shape and the adherence of the lumbar lordosis.

4. ARTICULATED STRUCTURE, according to one or more of the preceding claims, characterised in that the under-armpit supports (8), which support the body, can be adjusted in two perpendicular directions, through the insertion thereof in one of the holes (9) of the series obtained on the backrest (3), so as to be able to correctly fit and passing beneath the armpits of the seated person with the waist having an inclination below 45°, i.e. so as to be able to best adapt to the physical configuration of the user.

5. ARTICULATED STRUCTURE, according to one or more of the preceding claims, characterised in that, the framework 1 is completed with a cervical support (10), constituted by a cushion, moveable vertically, which serves as a support for the head and the over-shoulder.

6. ARTICULATED STRUCTURE, according to one or more of the preceding claims, characterised in that the seat (2) and the backrest (3) are hinged through the pins (1 1,12) on the base frame (4), to allow the aforementioned structure to serve as a normal chair (seat and backrest at 90°) or, with the forward inclination of the seat, to facilitate the sitting or rising of the person.

7. USE OF THE ARTICULATED STRUCTURE, according to one or more of the preceding claims, characterised in that it provides for the following steps:

- the articulated structure (1), with chair function, has at the beginning a closed seat and a 90° angle between the seat (2) and backrest (3);

- the inclination of the backrest (3) is adjusted at will by the user;

- the two under-armpit supports (3) are inserted in the holes (9) present on the backrest (3); - the person sits and, supported by the two under-armpit supports (8), adjusts the tilting seat (2) so that, lowering the waist and, simultaneously with the support action of the aforementioned under-armpit supports, the back is tensioned, so that the muscles extend and sooth the dorsal and lumbar intervertebral discs;

- the position of the cervical support (10) is adjusted.

8. ARMCHAIRS, CHAIRS, SEATS, WHEELCHAIRS FOR THE DISABLED AND THE LIKE, characterised in that it provides for the articulated structure according to one or more of claims 1 to 8.

Description:
Title: Articulated structure to be used for making armchairs, chairs, seats, wheelchairs for the disabled and other similar products

Description

The present invention regards an articulated structure to be used for providing armchairs, chairs, seats, wheelchairs for the disabled and other similar products, according to the general part of claim 1.

It is known that when there arises the need of sitting on the ground, without the help of any support means, human beings and even primates tend to assume a so-called "overturned N" configuration, i.e. with the feet on the ground, the knees bent with a considerable angle and with the hands placed on the ground or the hands surrounding the knees, with the aim of creating a specific sitting position, currently used only in particular situations.

Such body arrangement is however advisable when, in order to reduce the pain in the lumbar or dorsal area, there is required an intervertebral tension capable of respecting the ergonomics of the back.

In order to outline the invention better it should be observed that the vertebral column is a bone structure, surrounded by muscles with the support function, having three curved positions:

- the cervical lordosis, located at the level of the neck, which has a forward inclination;

- the dorsal kyphosis, projected backwards, which is between the chest and the abdomen;

- the lumbar lordosis, which is faced forward and involves the area most frequently subjected to pains. The vertebral column is made up of vertebrae, cylindrical-shaped bones, stacked on each other; between one vertebra and the other there are present the intervertebral discs, constituted by disc-shaped fibre-elastic structures, which serve as dampers and anti-friction elements and which, over time or due to erroneous postures of the body, tend to be compressed and deform causing pain, which at times may be extremely intense and long-lasting.

In the current art there are known numerous devices, which have the purpose of stretching the vertebral column, obviously respecting the ergonomics of the body, with the aim of reducing back pains.

Examples include the following patent documents:

- US 3,878,840, in which there is described an orthopaedic chair, in which though there can be identified an "overturned N" configuration, there is observed the impossibility of suitably tensioning the intervertebral discs; in particular the backrest does not allow following the configuration and the support of the back, there is no possibility of adjusting the angles of the knee and of the waist, the use of support cushions capable of accurately accompanying the lumbar lordosis are not provided for, same case applying to those for the head and the over-shoulder. In practice, it is not an ergonomic chair and thus it could cause distortive effects on the spinal cord over time.

- the device described in US 5,437,609 is provided with an under-armpit support and the seat is reclinable, lacking both the footrests and the step for supporting the feet, so as to confer an acute angle to the knees; however, it lacks a cushion which follows the lumbar lordosis, the backrest is not adjustable and there is no possibility of modifying the angle of the knees and waist; - the device described in US 4,688,557 does not allow obtaining an "overturned-N" configuration, due to the fact that it does not provide for any support of the feet for bending the knees at an acute angle, there lacks the cushion having the shape of the lumbar lordosis and it provides for an under-armpits support that is complex to use. Furthermore, document US 6,213,923, in which there is described a device according to the general part of claim 1 shall be deemed the most important document of the prior art.

Basically, the devices mentioned above and the other known and commonly used devices are configured as apparatus having poor ergonomics and which could cause distortive effects to the spinal cord over time.

An object of the present invention is to provide a device, referring to an articulated structure, to be used for making armchairs, chairs, seats, wheelchairs and the like free of the drawbacks revealed by the similar products of the known type.

Specifically, an object of the invention is to provide a device capable of facilitating a resting person, in the "overturned N" position ", capable of allowing the extension of the muscles and of the connected tendons, helping spacing the vertebrae and soothing the intervertebral discs, the entirety respecting the morphology of each person in seated position.

Such objects are attained by providing a structure which allows the seated person to assume an ergonomic position and which is made up of a lumbar support, having the shape of the lumbar lordosis and moveable vertically, a tilting seat, inclinable with an angle below 90° with respect to the backrest, a footrest for conferring to the knee an acute angle and an under-armpit support which, exiting in the front part of the backrest, has the function of supporting the seated body on a seat assuming an angle below 90° and which may reach up to 30°. Furthermore, the under-armpits protrusions are moveable so as to be able to fit and pass beneath the armpits of the person who remains seated, with the waist having an inclination below 45°.

The invention will be clearer from the description of a possible embodiment, provided by way of non-limiting example with reference to the attached drawings, wherein:

- figs 1 -2 represent two possible configurations of the articulated structure according to the invention, for conferring to the seated person two different "overturned N" positions;

- fig 3 represents the exploded view of the structure according to the invention;

- figs 4-5 represent the front views, respectively, of the entire structure according to the invention and of the backrest thereof alone;

- figs 6-7 represent the conditions of a person normally seated or rising on the structure according to the invention.

As observable in figs 1 and 2, the articulated structure according to the invention, indicated in its entirety with reference 1, allows the seated person to assume at least two different "overturned N" configurations and in particular more closed, when there is required a considerable tension of the vertebral column or more open, when there is required a rest position; said two configurations are made possible, after the seat 2 and the backrest 3 are suitably inclined, mutually connected through the base frame 4, solely modifying the support of the feet respectively on an upper step 5 or on a footrest 6, so as too vary the angle "a" of the knees and the angle "β" of the waist. From an operating point of view, in order to provide the correct tension and thus discharge the weight from the intervertebral discs in the lumbar area, the articulated structure 1 is also provided with a cushion or lumbar support 7, moveable vertically on the backrest 3 and sufficiently compact for maintaining the shape and the adherence of the lumbar lordosis.

Furthermore, in order to eliminate tension in the dorsal intervertebral discs, this requires the user to be positioned in a very narrow "overturned N" position, obtained through an extremely acute inclination of the seat with respect to the backrest and with an equally acute angle of the knees; on the backrest of the articulated structure there are applied under-armpit supports 8, which support the body.

The under-armpit supports 8, constituted, for example, by two iron bars, covered using a soft and non-allergic material exiting from the backrest, are provided so as to be able to correctly fit and passing beneath the armpits of the seated person, with the waist having an inclination below 45°, i.e. so as to be able to best adapt to the physical configuration of the user; they can be adjusted in the two spatial directions, through the insertion thereof in one of the holes 9 of the series obtained on the backrest 3.

Lastly, in order to rest the entire profile of the seated body, i.e. so as to ensure that the backrest follows the profile of the back, thus preventing distortions thereof, the framework 1 is completed with a cushion 10, or cervical support, moveable vertically, which serves as support for the head and the over-shoulder.

In order to outline the invention better following, in succession, are the steps for using the device according to the invention:

- the articulated structure 1 , substantially constituted by a chair, has at the beginning a closed seat and a 90° angle between the seat 2 and backrest 3;

- the inclination of the backrest 3 is adjusted at will by the user;

- the two under-armpit supports 3 are inserted in the holes 9 present on the backrest 3; - the person sits and, supported by the two under-armpit supports, adjusts the tilting seat so that, lowering the waist and, simultaneously with the support action of the aforementioned under-armpit supports, the back is tensioned, so that the muscles extend and sooth the dorsal and lumbar intervertebral discs;

- the position of the cervical support (10) is adjusted.

Lastly, as observable in figs 6 and 7, the seat and the backrest are hinged through the pins, respectively 1 1 and 12, to the base frame 4, this allowing the aforementioned structure also to serve as a normal chair (seat and backrest at 90°) or , with the forward inclination of the seat, facilitating the sitting or rising, in particular for persons with mobility problems.