ES1065190U - Folding chair particularly suitable for disabled persons (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Folding chair particularly suitable for the disabled, consisting of a first frame consisting of a backrest (1), a seating surface (2), a legrest (3), two arms (4); and a second frame composed of a pair of front legs (5), a pair of rear legs (6), a pair of opening rods (7) and a pair of transverse stiffening rods (8), the first and the second being second frame joined together and supported by the profiled stirrups (9 and 10), whose simultaneous movement of the backrest (1), the seat plane (2) and the legrest (3) is achieved thanks to the supported connection of the frame of such elements in the points (11, 12, 13, 14) as well as achieving an articulated parallelogram, characterized in that the movement of the gram parallel is possible thanks to the sliding of the two elements (15) in the corresponding tubes (16) located under the arms (4) while the simultaneous variation of the angle of the backrest (1), the seat (2) and the legrest (3) is achieved thanks to the presence in the points of support of the profiled stirrups (12a, 13a, 14a). (Machine-translation by Google Translate, not legally binding)

Description

Folding chair particularly suitable for disabled people.

Folding chairs are commonly known in  particular folding chairs that allow assuming several positions from one collection to another lying through positions intermediate. These types of chairs are composed of a seat, a backrest and an ideal element to support the legs.

In the most economical models of chairs of this type, the inclination of the backrest can be varied, moving and fixing later or further back with respect to its longitudinal axis the position of the arms, whose limb is articulated at back.

In some more expensive models the variation of the backrest inclination determines at the same time the variation of the inclination of the seat and the leg rest.

Example of this second type of chair, is known for example the French patent 2082887 of Lafuma Freres from 12.10.1971 that describes a type of chair called relaxation constituted by an articulated metal armor, which thanks to timely links between seat, backrest and leg support, allows by varying the position of the backrest, also varying the position of the seat and leg rest, essentially in this type of chair, leaning back of chair leans at the same time and automatically the seat plane and the position of the support your legs until you assume a position whose head and feet are They find on the same line.

The concept expressed in the mentioned patent has been perfected in patent EP 0689784 with two caps in those that support the upper articulated points of the frame, moving such caps along a sliding axis is articulates the movement of the backrest, seat and backrest legs, getting a more fluid glide.

Object of the present invention is the realization of a folding rest chair that based on the basic idea expressed in patent 208288 of 1971, with appropriate modifications and sagacity allows the realization of a rest chair folding equipped with interchangeable wheels of a shelf removable slide, folding foot bracket, motor electric detachable commanded by a removable joistick or remote, getting a rest chair particularly suitable for requirements of disabled people, which can be folded and transported with extreme ease and that can move, thanks to interchangeable wheels, on smooth surfaces, as per example the floor of a house, on unconnected surfaces such as for example a street and on ductile surfaces as per example sand or earth.

The folding chair of the present invention is composed of: a frame that forms the structure of the plane of seat, back support and leg support; of a second frame attached to the first with appropriate means that forms the legs of the chair; the first being like the second frame composed of elements, at least partially supported between them or directly or through profiled plates and / or bars link, and the first and second frame are connected between them and supported directly or through plates and / or bars to profiled purpose, so that the whole can be closed, as well as reducing the space it occupies and in such a way that the  tilt variation forward or backward of the backrest it involves an inclination (tilt) of the seat plane, such that the point at which they support the thighs is higher than the point at the one that supports the butt and at the same time the support plane of the legs are lifted as well as the weight of the person, which in the sitting position loads almost completely on the butt, come partially transferred to the back.

In order to allow simultaneous movement and coordinated backrest, seat plane and backrest these legs are attached to each other through stirrups timely profiled and hinged; the backup is also equipped with a tubular sliding with friction in a solidarity tube to the lower part of the arm to which the hinge is also hinged supports legs; The leg rest is also hinged to the tubular which closes the seat plane; the set described forms a articulated parallelogram that thanks to the distances of the sides opportunely calculated, to their inclination and to the position of the articulation points, allows simultaneous movement of the backrest, seat plane and leg rest.

The invention will be described with reference to a preferred embodiment with reference to the cited drawings  then:

Figure 1 shows a side elevation view of the chair in semi-shaded position.

Figure 2 shows a perspective view from above the chair in a semi-shaded position.

Figure 3 shows a perspective view of three fourth from the top of the chair in an upright position and a extended retention detail.

Figure 4 shows a perspective view of 3/4 back of the chair in an upright position.

Figure 5 shows a perspective view from the top of the chair in an upright position.

Figure 6 shows a perspective view of 3/4 from under the chair in a partially lying position and equipped with wheels for sand.

Figure 7 shows a side elevation view of the chair in closed position.

Figure 8 shows a detail in side elevation of the transmission of motor movement to the wheels.

Figure 9 shows a perspective view by under the rear wheels with the engine, partially cut.

With reference to these figures the chair of the The present invention is composed of a first composite frame by a backrest (1), a seat plane (2), a leg rest (3), two arms (4), and a second frame consisting of one pair of forelegs (5), a pair of hind legs (6), a pair of opening cranks (7) and a pair of bars transversal stiffening (8), the first and the second being frame joined between them and supported through the stirrups profiled (9 and 10), so the set can be closed Easily for transportation.

The simultaneous movement of the backrest (1), of seat plane (2) and leg support (3), is achieved thanks to the supported connection of the frame of such elements, in the points (11, 12, 13, 14), thus obtaining a parallelogram articulate. The movement of the parallelogram is possible thanks to the sliding of the two elements (15) in the corresponding tubes (16) located under the arms (4); while the variation simultaneous angle of the backrest (1), seat (2) and support legs (3), is achieved thanks to the presence in the points of support of profiled stirrups (12th, 13th, 14th).

The frame is completed as usual with the fabric (16a) fixed to the frame in a removable way known as for example by means of elastics that pass through of holes predisposed on the fabric and around the frame or at appropriate anchor points.

As indicated above the chair of the The present invention has been studied in a particular way to solve the problems of people affected by problems motor, to this end the pair of legs (5 and 6) is provided formerly of splicing forks (17) that are spliced quickly with an elastic jump system or similar to the end of the tubes that constitute the legs (5) that can be assembled or disassembled quickly as required; obviously the rotating forks (17) are completed with the wheels (18). The hind legs (6) with a method similar to that described for the forelegs (5), can quickly become solidarity with an elastic jump system or similar to a bra (19) on which are coupled the wheels (20).

As indicated above for guarantee the mobility of the chair on any terrain, to back bras (19) can stand in solidarity, with the appropriate exchanges, also large diameter wheels, such as wheels (20a) illustrated in figure (5).

In the cited figures the chair of the present invention equipped with electric motors (21) fixed on a plate (40), one per side, which allows release without the help from third parties; in order to allow the mounting of rear wheels of at least two different diameters have been taken for setting point two measures: a first measure according to which the point of The tangency of the pinion (33) of the motors (21) is the same for the small diameter wheel (20) that has the sprocket wheel movement (34) outside the rim of the tire, which stops the upper diameter wheel (20a) that has the intake sprocket  of the movement (35) internal to the spokes of the tire; has been calculated that the small wheel (20) has a radius close to 50% smaller than that of the larger diameter wheel (20a). For ensure maximum strength of the assembly, fences and wheels Toothed are made in a single element.

The second measure to facilitate the assembly of the rear wheel of greater diameter, is the presence of a service wheel (23) on each of the two legs posteriors, which can be easily dejected or lowered when it is used the smallest diameter wheel; the casters (23) they keep the chairs at the right height of the ground and in the position correct to allow the assembly or disassembly of the wheels. Another function of the casters (23) is to allow the drag without No chair work when closed, as shown in Figure 7

The chair frame in correspondence with the arms (4) is linked to a tubular (24) on each side that allows the mounting of accessories such as: the joistick or remote (29) for motor drive and chair guidance; the shelf object holder (25); mounting gym accessories like for example the "manocicleta" that allows to exercise the arm muscles acting on a kind of device Cycle moved by hands.

Other accessories, such as the bra retractable (26) to support a diseased or plaster leg may be inserted into the tubular of the frame that are located the right and left of the seat plane.

An element of great importance for the safety of the chair is constituted by the sliding block (27) frictionally on one or both frames (6) of the rear legs, such block (27) prevents the movement of the stirrup (9) thanks to the tongue (9a) integral with the stirrup (9) which in the stop position of the block (27) is housed under the block, preventing rotation of the stirrup (9), which prevents the approaching of the front legs (5) towards later (6) or vice versa; This approach could be accidentally caused by the collision of the wheels against an obstacle such as a sidewalk, a hole or similar, which could cause the closure of the
chair.

As indicated previously another of the  New features of the chair of the present invention are shown in figure 6 and it is the possibility of being able to mount wheels of roller (28-41) that allow to move the chair on ductile grounds, such as sand.

Another element of comfort that returns to the chair particularly suitable for the use of people with motor difficulties is the presence of the stirrup (30) telescopically introduced in the limbs of the leg support frame (3) and adjustable to the distance through a spring latch that fits into a series of holes (31); to better clarify its operation it is necessary that the stirrup (30) rotate on the supports (30a) and on the supports (32) and can slide axially along the frame (3).

The chair of the present invention is intended in particular to people with disabilities, for whose effect and to allow a perfect function for such people can be equipped with orthopedic supports (38) and a headrest (37), it can also be provided with an object holder associated with the face back of the backrest.

A handle (36) is present in the part upper back of the chair that can thereby be pushed without problems or being towed, thanks also to the casters of service (23) when closed or folded.

Claims (18)

1. Folding chair particularly suitable for disabled people consisting of a first frame consisting of a backrest (1), a seat plane (2), a leg support (3), two arms (4); and of a second frame composed of a pair of front legs (5), a pair of rear legs (6), a pair of opening connecting rods (7) and a pair of stiffener crossbars (8), the first and the second frame joined together and supported by the profiled stirrups (9 and 10), whose simultaneous movement of the backrest (1), the seat plane (2) and the leg support (3) is achieved thanks to the supported connection of the frame of such elements in the points (11, 12, 13, 14) as well as achieving an articulated parallelogram, characterized by the fact that the movement of the parallelogram is possible thanks to the sliding of the two elements (15) in the corresponding tubes ( 16) located under the arms (4) while the simultaneous variation of the angulation of the backrest (1), the seat (2) and the leg support (3) is achieved thanks to the presence at the points of support of the profiled stirrups ( 12th, 13th, 14th). 2. Folding chair particularly suitable for disabled people, according to the preceding claim characterized in that the terminal part of the frame of the front legs (5) is capable of receiving and retaining rotating forks (17) provided with wheels (18) and that the terminal part of the frame of the rear legs (6) is capable of receiving and retaining a support (19) on which the wheels (20) are coupled. 3. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that large diameter wheels (20a) can be joined to the rear bras (19). 4. Folding chair particularly suitable for disabled people, according to the preceding claims characterized in that said wheels (20, 20a) can be driven by electric motors (21) integral to the frame through a plate (40) with quick plugs that They allow positioning and change quickly. 5. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that the cogwheel (35) for power take off for the large diameter wheel (20a) and because the cogwheel (34) of the wheel Small diameter (20) have the same point of tangency with the motor pinion (33). 6. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that a folding service wheel (23) is provided in a removable way on each side of the frame of the rear wheels. 7. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that a tubular (24) is connected to the frame of the chair, corresponding to each of the arms (4). 8. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that a joistick or control for motor drive and chair guidance is connected to said tubular (24). 9. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that an object carrying shelf (25) is connected to said tubular (24). 10. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that a gymnastic tool for operating with the hands is mounted to said tubular (24). 11. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that a retractable support (26) can be inserted in the tubular of the frame to the right and left of the seat plane to support a diseased leg or plaster. 12. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that a friction block (27) is present on one or both frames (6) of the rear legs that blocks the movement of the articulated stirrups (9 ) encompassing in the locked position the tongue (9a) integral with the stirrups (9) and preventing the accidental closing of the chair. 13. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that the wheels are rollers (28-41) suitable to allow the movement of the chair on ductile surfaces such as sand. 14. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that it has a stirrup (30) telescopically inserted in the extremities of the leg support frame (3) and adjustable in the distance through a spring latch which fits into a series of holes (31), such stirrup rotates on the supports (30a) and on the supports (32) and can slide axially in the frame (3). 15. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that it has orthopedic supports (38) and headrests (37). 16. Folding chair particularly suitable for disabled people, according to the preceding claims characterized by the fact that it presents an object holder on the back side of the backrest. 17. Folding chair particularly suitable for disabled people, according to previous claims characterized in having a handle (36) for gripping who pushes the wheelchair. 18. Folding chair particularly suitable for disabled people, according to previous claims characterized in that the castors service (23) facilitate the transport of the folded chair.