CH717704A1 - Aid device for people with reduced mobility. - Google Patents

Abstract

The present invention describes an assistance device (1) making it possible to straighten a person on the ground using a seat (4) whose seat (42) can be lowered until it comes into contact with the ground. It comprises for this purpose a single mast (3) making it possible to raise and lower the seat (4), fixed to a mobile frame (2). The seat (4) is fixed by its backrest (41) so as to allow contact of the seat (42) with the ground.

Description

Technical area

The present invention relates to a device for assisting people with reduced mobility. In particular, it is about helping people to get up in the event of a fall at home, with a minimum of effort. The device can also be used by a third party either at home or in a hospital environment.

State of the art

[0002] Many devices are known to assist people with reduced mobility, either to allow them to maintain their autonomy, or to facilitate the efforts of third parties who assist them on a daily basis. In particular, elderly people living alone at home are vulnerable in the event of a fall. Younger people with temporary or permanent disabilities may also need assistance to get up if they find themselves on the ground. If a third person is present, he can help the patient to get up, sometimes at the cost of great physical effort which can be detrimental to the health of this third person, all the more so for overweight patients. The risks of loss of balance or incorrect handling when lifting the patient are also not zero. Direct help from a third party can also be poorly tolerated by patients who prefer to be able to manage on their own.

[0003] It is therefore essential to offer them a device that is both manageable, stable and robust, which allows them to get out of any uncomfortable or dangerous situation. Such a device must be adaptable to a maximum of situations and people, including overweight people. However, the robustness necessary for these devices is often detrimental to their maneuverability or restricts their field of application. The most robust systems prove to be unsuitable in certain circumstances due to their size, lack of accessibility or lack of movement of the moving parts.

[0004] The document FR3086168 describes a mini lift for disabled people. It comprises a movable seat in height along a mat, on which the patient sits by placing his legs on either side of the mat. Such a device, if it makes it possible to facilitate the transfer of a disabled person from a wheelchair to another place, is not suitable for lifting a person on the ground. The document GB2344579 proposes an alternative device making it possible to install a patient in a wheelchair but remaining unsuitable for lifting him in the event of a fall to the ground.

[0005] Document US 2015035333 proposes a removable seat, which can be separated from its support and placed under the patient before being again associated with the support. Such an arrangement requires many manipulations, in particular to reposition the support relative to the seat once the patient is on it.

[0006] The document GB2492837 describes a portable device for raising a patient on the ground, comprising a flexible seat stretched between two arms and which can be lifted once the patient is installed on it. The device is however not easily mobile, telescopic arms must be deployed to ensure its stability, which obliges the patient to several manipulations before being able to get up. He must also be able to move to the device to be able to benefit from it. Such a device most often requires the intervention of a third party and does not give the patient all the autonomy expected.

[0007] The document US2012104818 describes a tubular structure mounted on wheels and having a movable seat in height on three contact points for more robustness. The seat thus surrounded by the tubular structure and the lifting devices remains inaccessible for a person on the ground, who must position themselves in the axis of the seat in order to be able to install themselves there.

Brief summary of the invention

An object of the present invention is to provide a device that is both handy and robust and suitable for autonomous use by the patient. In particular, an object of the present invention is to provide an assistance device for people with reduced mobility so that they can use it completely independently, the device being easily accessible and usable without the help of a third party. .

Another object of the invention is to provide an assistance device suitable for several uses, which may or may not involve a person other than the patient. In particular, the present device can be used by the patient independently, as well as by a third party. The device according to the present invention is thus adaptable or modular according to the environment and the uses. More particularly, the device according to the present invention can be adapted for use exclusively in hospitals or medical institutions for the attention of nursing staff. It can be intended for mixed use in a hospital environment or at home, allowing both the intervention of medical personnel and the autonomy of the patient. It can also be adapted for exclusively personal use, at home and in total autonomy.

According to the invention, these objects are achieved by the claimed assistance device. It includes a single mast, leaving free the perimeter of the seat fixed to the mast, allowing maximum accessibility to the seat. The seat is fixed to the mast by part of its backrest, leaving its lower part free so as to improve its amplitude of travel. The seat cushion can thus descend to the ground. The seat frame is designed in such a way as to preserve the necessary sturdiness while improving the ergonomics and suitability of the device for many different situations.

[0011] This solution has the particular advantage over the prior art of giving the patient in a situation of reduced mobility more autonomy.

[0012] For the purposes of this description, the term "patient" designates any person with reduced mobility, whether hospitalized or not, regardless of the causes of the lack of mobility. Reduced mobility is reflected in particular by difficulty getting up from a seat or getting into it, standing up to move from one place to another, bending down or sitting down. It also results in an inability to get up without help in the event of a fall to the ground. The present assistance device therefore provides support and comfort for the movements of the patient, as well as assistance which may prove to be vital in the case of isolated patients.

Brief description of figures

Examples of implementation of the invention are indicated in the description illustrated by the following figures: • Figure 1: Example of device according to one embodiment of the present invention. • Figures 2a, 2b, 2c: Details of the seat structure. • Figures 3a, 3b: Details of the chassis structure. • Figure 4: Example of device according to a second embodiment of the present invention. • Figure 5: Example of device according to a third embodiment of the present invention.

Example(s) of embodiment of the invention

The assistance device 1 according to the present invention is shown in Figure 1. It comprises a chassis 2 surmounted by a single mast 3 on which is fixed a seat 4. The chassis2 comprises at least two side members21 joined by a crosspiece22. The crosspiece 22, in addition to holding the two spars 21, serves as a support for the mast 3, which is fixed to it in the middle. The crosspiece 22 can be arranged approximately in the middle of the two spars 21 so that the four ends of the two spars are approximately equidistant from the mast3. Alternatively, the crosspiece 22 can be arranged at the end of the two longitudinal beams 21 so that the assembly formed by the crosspiece 22 and the longitudinal beams forms a U.

[0015] the traverse 22 can be arranged eccentrically relative to the longerons 21 and at a distance from their end. The crosspiece 22 can for example join the side members 21 approximately at a third or at a quarter of their length, or at any other off-centre location. The longitudinal members 21 thus each have a long portion 21 a and a short portion 21 b with respect to the cross member 22. The relative length of the long21a and short21b portions can be adapted according to requirements. The longest portion of the spars 21 is preferably oriented on the same side of the mast 3 as the seat 4.

The seat4comporte a dossier41and a assisi42solidaire dossier41. Seat4 details are shown in Figures 2a and 2b. The file 41 includes a bottom 410 associated with at least 2 side frames 410a, 410 and at least one, or even at least two, central frames 411a, 411b. The side frames 410a, 410b are each integral, at their lower end, with an axis 420a, 420b disposed at right angles to the corresponding frame. The side reinforcements 410a, 410b are made in such a way as to keep the axes 420a, 420b parallel to each other. the axes 420a, 420b make it possible to hold the seat cushion 42 of the seat, which can be a flexible seat cushion of fabric or leather or rubber or made of a synthetic polymer. The base 42 is thus arranged between the axes 420a, 420b. It is preferably loose, so as to descend below the level of the axes 420a, 420b which support it. In particular, the seat 42 descends below the level of the axes 420a, 420b by a distance of the order of 1 to 6 cm, such as approximately 3, 4 or 5 cm. In this way, the base 42 can easily be brought into contact with the ground. The thickness of the seat 42 is also sufficiently thin to limit, or even avoid, any obstacle for the patient on the ground. In particular, the patient on the ground can easily slide onto the seat once it is in the low position. The thickness of the seat is for this purpose preferably less than 1 cm, preferably less than 5 mm. The seat 42 can have a thickness of the order of 1 to 2 mm. The material is chosen so as to be compatible with the hygiene and resistance requirements of medical environments. It may for example be made of synthetic polymer, such as PVC. It is advantageously reinforced with a flexible integrated reinforcement.

The side frames 410a, 410bsont oriented parallel to the mast3. An important aspect of seat architecture is its robustness. In particular, when a patient settles down on the seat 42, the force of gravity tends to bring the axes 420a, 420b closer to each other under the effect of the patient's weight. For the comfort and safety of the patient, it is important that the axes 420a, 420br remain parallel to each other, including in the case where a heavy load is placed on the seat. For this purpose, the axes 420a, 420b can be steel tubes which are sufficiently robust so that their deformation remains minimal or zero. Their point of attachment to the folder 41, by means of the side frames 410a, 410b, remains however crucial for the rigidity of the whole. For the reasons of accessibility mentioned above, it is important that the seat be free of any obstacle, which prohibits the presence of a reinforcement arranged between the axes 420a, 420b.

The lateral reinforcements 410a, 410b are arranged so as to limit the deformations of the seat 4 while preserving the lightness of the device 1. According to a possible arrangement, the lateral reinforcements 410a, 410b each take the form of a longitudinal plate of small thickness, between 0.5 ml and approximately 2 cm. The width of the plate is oriented along axis 420a, 420bauquel the side reinforcement is connected so as to increase the contact surface. The edge of the side reinforcement can thus be associated by welding to the surface of the corresponding axis 420a, 420b. Alternatively, the edge of the side reinforcement can be inserted in the axis 420a, 420b to reinforce its cohesion. According to other possible variants the axes 420a, 420b can be fixed on one of the inner or outer faces of the longitudinal plates rather than on their lower edge. The terms "inside" and "outside" define the usual orientations commonly accepted by those skilled in the art. The inner faces of the plates used as side frames 410a, 410b are oriented towards the inside of the structure of the seat 4 and face each other. The outer faces of the plates used as side frames 410a, 410b are oriented towards the outer space of the seat 4.

[0019] The width of such plates is adapted according to the resistance required. It may for example be between approximately 3 or 4 cm and more than 10 cm, or even more than approximately 15 cm. However, the width of such plates need not be uniform. The plates used as side reinforcements 410a, 410b can advantageously be wider at their base, the attachment point with the axes 420a, 420b, than at their opposite end.

The fond410du dossier41peut be welded or screwed on a longitudinal edge of the plates, so that the width of the plates forms a right angle with the fond410. In other words, the width of each of the plates used as side reinforcements 410a, 410b falls within a plane perpendicular to the bottom 410 of the backrest 41 and each comprising one of the two axes 420a, 420b. Although the side reinforcements can be fixed to the bottom 410 by any suitable means such as welding or screwing or equivalent, the side reinforcements can be obtained by bending, under a suitable press, of a single plate making it possible to form the bottom 410 and the side reinforcements 410a, 410ben one piece. The plates serving as side reinforcements 410a, 410b can be arranged in contact with the outer edges of the bottom 410 or set back with respect to the outer edges of the bottom 410. In the case where the plates are set back relative to the side edges of the bottom 410, the resulting lip can be folded over the outer face of the plate, so as to cover the plate, either partially or totally. According to this arrangement, the side reinforcements 410a, 410b are reinforced. In addition, the edges of the bottom 410 once folded over the side frames 410a, 410b can be fixed there by welding or screwing or crimping so as to further consolidate the assembly.

[0021] Alternatively or in addition, the façade 412 can be sized to exceed the side frames 410a, 410b so as to leave a lip protruding towards the edge of the dossier 41 (figure 2c). Like the bottom 410, the lip of the facade can be folded over the outer face of the side frame 410a, 410b, so as to cover it, either partially or totally.

[0022]According to one embodiment, the fond410et the façade412sont both sized so as to let the lips protrude on either side of the side frames 410a, 410b, which thus remain set back from the outer edges of the backrest. A finishing plate or a covering can be added to fill the space between the lips of the back410and the facade and hide the side reinforcements. The bottom 410 and the front 412 can also be dimensioned so that their height is greater than the length of the side and central reinforcements, so that they can be folded over the field of the backrest in the upper and lower parts (FIG. 2c).

The side frames are further maintained by a façade412du dossier41, arranged parallel to the fond410. In this way, any deformation of the side frames towards the inside of the seat 4, under the effect of the weight of the patient, is counteracted. The facade 412 can be welded to the longitudinal edge of the plates which is still free, opposite to that already associated with the bottom 410. It can alternatively be screwed or maintained by any suitable means. It follows from this structure that the file 41 of the seat 4 is generally hollow, and therefore light. The assembly formed by the axes 420a, 420b, the side frames 410a, 410b, the bottom 410 and the front 412 remains very robust, however.

The fond410, the side frames410a, 410b, the axes420a, 420b, the façade412et or the central frames411a, 411b, can be entirely metallic. Alternatively, one or more of these elements can be made of a non-metallic material, such as a hard polymer, a plastic. In this case, one or the other of the bottom410 and the front412 or both can be made of plastic.

According to one embodiment, the assembly formed by the bottom 410, the front 412 and the side frames 410a, 410b can be fully or partially covered or encapsulated with a protective and/or aesthetic material such as a hard or flexible plastic. .

The axes420a, 420bsont typically cylindrical metal tubes of sufficient diameter to withstand the weight of a patient. Their diameter can for example vary from approximately 1 cm to 2 or 3 cm depending on the material used and its thickness. Their length is adapted to a comfortable and secure seat of the patient. It can vary from about 30 cm to about 50 cm. The end of axes 420a, 420 linked to the side frames can be included in the front 412, which increases the robustness of the assembly and its aesthetics. In addition, a lower plate can be arranged at the base of the backrest 41 (not shown) from one axis to the other, allowing both to close the remaining opening between the bottom 410 and the front 412 and to further consolidate the assembly. Alternatively or in addition, spacers can be placed in the thickness of the backrest 41 between the two side frames 410a, 410b to minimize any deformations.

The seat4est held to the mast3by its dossier41. To this end, the file 41 comprises at least one central frame 411, preferably two central frames 411a, 411b, oriented parallel to the mast 3 and arranged in the thickness of the file 41, that is to say between the bottom 410 and the front 412. The central frame(s) 411a, 411b can take the form of plates identical to those used as side frames 410a, 410b. Other shapes can nevertheless be envisaged, such as a tube of square or rectangular section. The central reinforcement(s) 411a, 411b comprise at least one attachment point 413a, 413bau mast3. Such a point of attachment 413a, 413b can for example take the form of a flange enclosing the central reinforcement 411a, 411b crossing the bottom 410 of the backrest 41 to be fixed to the mast 3. Such a U-shaped flange can thus be fixed to the mast 3 by its two free ends, by welding or screwing or any other suitable means, while maintaining the central reinforcement(s) 411a, 411b of the file 41. Alternatively, the central reinforcement(s) 411a, 411b are screwed directly to the central mast 3 at the attachment points 413a, 413b. Preferably, the central frame(s) 411a, 411b comprise at least two attachment points to the mast 3, which can be optimally distributed along the central frames to ensure both robustness and rigidity to the backrest 41 of the seat 4. In this case, the attachment points 413a, 413b can be arranged on a central frame 411a, 411b at approximately one third and approximately two thirds of its height, or at approximately one quarter and approximately three quarters of its height. So as to leave the lower part of the backrest 41 free, to allow the seat 42 to come into contact with the ground, the attachment points 413a, 413b are preferably arranged on the upper part of the central frame(s) 411a, 411b, corresponding to half or two-thirds of their length.

Alternatively, the central reinforcements 411a, 411b can be fixed to the mast 3 by through studs (not shown), particularly in the case where the central reinforcements 411a, 411b are tubular.

[0029] The central reinforcements 411a, 411b, like the side reinforcements, are in contact with both the fond410et the façade412du dossier41, which limits their deformation. In the case where the file 41 comprises several central reinforcements 411a, 411b, they can be connected to each other, or to one another, by transverse splints, further stiffening the assembly. Transverse splints can also be provided between the central reinforcements 411a, 411 and the side reinforcements 410a, 410b.

The seat4 is advantageously provided with armrests 43 on which the patient can lean to position themselves on the seat 42 of the seat 4. The armrests43 must therefore themselves be robust and support the weight of the patient. It is particularly appropriate that they do not sag under the weight of the patient, and that they do not shift, either towards the inside or towards the outside of the seats 4 under the patient's efforts to pull themselves up on the seat 42. The armrests are advantageously attached to the side frames 410a, 410b of the backrest 41, the rigidity and robustness of which make it possible to support the efforts of the patient. To this end, each side frame 410a, 410b can be provided on its outer face with a connection button 414a, 414b, allowing an armrest 43 to be connected. Each connection button 414a, 414b shares with the corresponding side frame 410a, 410b a sufficiently large surface to limit or avoid possible slopes due to the leverage effects of the armrest 43 during the efforts of the patient. The link buttons 414a, 414b are therefore not limited to pivot axes fixed to the side frame 410a, 410b. They take for example the form of a cylinder, one of the faces of which is fixed or integrated into the side reinforcement 410a, 410b. The cylinder can thus occupy the entire width of the plate serving as lateral reinforcement 410a, 410b. The leverage effects resulting from the forces applied to the armrests43 are thus minimized or even eliminated. The plate used as a side reinforcement 410a, 410b can have an increased width at the level of the connection buttons 414a, 414b so as to be able to increase the diameter of the connection buttons 414a, 414bet consequently the contact surface with the corresponding side reinforcements 410a, 410b. Such an arrangement is illustrated by Figures 2a and 2b. The connection buttons 414a, 414b can be integrated into the thickness of the side frames 410a, 410b. In this case, the side frames 410a, 410b are pierced with a hole of suitable diameter to accommodate the connection buttons 414a, 414b, which can be embedded in the thickness of the side frame 410a, 410b, then optionally welded or riveted. Alternatively, the connection buttons can be directly welded to the outer surface of the side frames or screwed into the side frames 410a, 410b.

The armrests43sont advantageously retractable to facilitate patient access to the base42. The armrests can for example be pivoted upwards, from a position making it possible to take support, towards a retracted position. Such a retracted position corresponds for example to an orientation of the armrest parallel to the longitudinal axis of the side frame, in the plane formed by the backrest 41 of the seat. The position allowing support typically corresponds to an orientation of the armrests 43 parallel to the axes 420a, 420b of the seat 42. The connection buttons 414a, 414b are arranged so as to allow rotation of the armrests 43 from one of the support positions and retracted towards the other. They can for example comprise an axis of rotation about which the corresponding armrest 43 can pivot and a slot allowing the armrest 43 to pass between the two support and retracted positions. Alternatively, the connection buttons 414a, 414b are rotatably mounted in the side frames 410a, 410b, so as to allow the armrests 43 to pivot.

The chassis2, like the seat4, is arranged so as to remain light while maintaining the robustness necessary for the needs. Details can be seen in Figures 3a and 3b. The crosspiece 22 comprises a bottom 221a, two side panels 221 and a top 221c, such that the crosspiece 22 is generally hollow. At least one splint, or even two splints 222a, 222b are arranged between the bottom 221a and the top 221c of the crosspiece 22. The splint(s) 221a, 221b can be welded or screwed both at the bottom 221a and above 221c of the crosspiece 22 so as to maintain its integrity. The side panels of the crosspiece 22 can also be fixed to the fishplates 222a, 222b for better robustness. The assembly consisting of the bottom 221a, the side panels 221 and the top 221 c of the crosspiece 22, all joined together, form a hollow structure. The fishplates 222a, 222b serve as an anchor for the mast 3, which can be screwed there through the top 221c of the crosspiece 22. Preferably, the fishplates 222a, 222b each comprise at least one hole, preferably two holes, allowing the passage of screws or bolts through the crosspiece 22 so as to screw the mast 3 from the bottom 221 of the crosspiece 22. The bottom221a, the side panels221bet the top221c of the crosspiece22can be fixed and/or integrated into the longerons22by their ends. The spars 22 are also hollow, as shown in Figure 3b.

The longerons22peuvent be equipped at each of their ends of a wheel5. The wheels 5 can all be identical and free to rotate along a vertical axis. These are idler wheels which give the device1 great maneuverability. However, the stability of the device can be affected, especially when the patient leans on the device1 to sit on the seat42. The idler wheels can each be provided with an individual locking system so as to avoid untimely movements of the device1. However, this arrangement remains impractical because the idler wheels must then be individually released from their brake once the patient is in place on the seat42. Preferably, device 1 comprises at least one fixed wheel, preferably two fixed wheels 5a, 5b, so as to limit uncontrolled movements of device 1. The fixed wheels 5a, 5b are preferably arranged on the short portion 21b of the longitudinal members 21. They are also advantageously arranged on their inner face so as to limit the bulk of device 1 . A braking means 441 makes it possible to immobilize at least one of the fixed wheels 5a, 5b, preferably the two fixed wheels at the same time. Such braking means may for example be one or more buffers actuated by a cable 442 between a contact position on the wheel, allowing it to be braked, and a position away from the wheel. The cable 442 can be activated by a manual control 44 placed within reach of the patient. The manual control can be activated by the patient regardless of his situation, whether he is installed on the seat 42 or, on the contrary, leaning on the device to settle there. The patient can easily activate the brake manually while leaning on the device1, which facilitates the lifting operation when he is on the ground and limits the risk of losing his balance during the operation. There is no need for a third person to maintain the device1, which gives the patient all the autonomy required.

[0034] Although the chassis 2 is described here with 4 wheels, the present invention includes any variant, including a chassis comprising 3 wheels only. For example, the crosspiece 22 can be arranged at the end of the longerons 22 so as to form a U, the longerons being limited to their long portion 21a. A third spar can be arranged in the central part of the crosspiece 22 opposite the two spars21. This third spar can be fitted with a wheel at its end so that the assistance device 1 has three wheels.

[0035] The brake44est control is preferably arranged on one of the armrests43. It activates the cable 442 and brakes the fixed wheels 5a, 5b. The position of the seat4 being variable with respect to the wheels5 of the device, the length of the cable442 is such that the brake can be activated independently of the position of the seat4.

The mât3est fixed to the traverse 22 by a pillar of inking 31. It comprises one or more mobile supports 32a, 32b able to slide relative to each other along their longitudinal axis (FIG. 4). The mast3 can thus be deployed telescopically from a retracted position, to a deployed position. The seat 4 is fixed to the mobile support 32 or to the last of the mobile supports 32 b, so that it can be moved from a low position to a high position and vice versa. The seat 4 is fixed in such a way that when the mast 3 is in the retracted position, the seat 42 rests on the ground. In other words, the lower part 415 of the backrest 41 remains free at least over a height equal to the height of the chassis2. The height of the frame2 designates the distance separating the top221c from the crosspiece22 on the ground. It can be between 10 and 20 cm approximately, or of the order of 12 to 15 cm.

The longerons21, in particular their long portions21a, are sufficiently spaced from each other to allow the passage of the assisi42until the ground. The mast3 includes a lifting device (not shown) allowing it to be deployed and retracted. Such a device may for example be an endless screw, a jack, a wound cable system or any other suitable device for the deployment of the mobile supports 32a, 32b. The lifting device is preferably incorporated in the mast3. It can be actuated by an electric motor (not shown) arranged in the mast3, or in the frame.

The longerons21et/or the traverse22peuvent include internal or external reinforcements. For example, one of the ends or both ends of each spar 21 can be equipped with an internal reinforcement. Figure 3b shows an example of such reinforcements 225a, 225b arranged inside the hollow structure of chassis 2.

[0039] The device of assistance1permet thus a great movement of the seat4, from its low position where the assisi42est in contact with the ground, to a high position where the seat allows the patient to stand up easily. In the high position, the seat is at a height of between approximately 50 cm and 1 m, or between approximately 60 cm and 90 cm, or of the order of 70 cm, depending on the uses of the device 1 and the height of the patients.

The electric motor involved in the deployment of the mast3 can be actuated by means of a control device which can be fixed or integrated into the device1, or independent of the device1. The mast3 control can for example be operated from an armrest43. This arrangement is however not optimal, because it obliges the patient on the ground to reach the armrest 43 to lower the seat 42 to the ground. The control device is advantageously free and connected to the assistance device by a twisted electric wire. It can take the form of a box comprising the controls necessary to operate the mast3 and adapt the position of the seat4. One or more attachment systems can be arranged on the assistance device 1 to removably fix the control box there. For example, a system of clips or a suitable housing can be arranged on the frame to house the control box therein, so that the patient on the ground can easily grab hold of it to lower the seat. Another attachment system, identical or different, can be fitted to the seat4, allowing the patient to house the control box there once installed on the seat42.

[0041] The control device is alternatively a remote control that the patient can keep on him and which makes it possible to operate the mast3, even remotely.

[0042] The motor involved in the activation of the mast 3 can also be able to activate the braking of the fixed wheels 5a, 5b. To this end, the control device may include, in addition to the mast 3 controls, a braking control by means of adapted braking systems 441 . The patient is then able to immobilize the assistance device1 while keeping both hands free. Once installed on the seat, all he has to do is activate the control to release the brakes.

[0043] According to an even more advantageous embodiment, one or more of the fixed wheels 5a, 5b are further driven, activatable by an electric motor, which may be the same motor as that involved in the activation of the mast 3 or another motor. An independent motor for each wheel can be provided. In this case, braking is performed by the motor or motors connected to the fixed wheels 5a, 5b. The control device, in addition to controlling the deployment of mast 3, here comprises the means of activating the motor or motors of the fixed wheels, thus making it possible to advance and turn the assistance device 1 . In the case of a remote control, the patient on the ground can easily control the assistance device 1 remotely to bring it closer to him and settle there. Alternatively or in addition, the brake control 44 arranged on the armrest 43 can be replaced by a control system such as a joystick, making it possible both to actuate the mast 3 and to control the advance and orientation of the assistance device 1 .

[0044] A rechargeable battery can be included on the chassis2 or on the mast3. A warning device can also be provided to inform the patient or a third party of the charge level of the battery. Other accessories may be provided, such as a seat belt, sensors making it possible to identify the presence of the patient on the seat and/or the position of the seat4, or devices for connection to a remote monitoring network.

[0045] A clutch system can be provided to allow the release of the fixed wheels 5a, 5bet to allow the patient or a third party to use the assistance device 1 manually. In particular, the assistance device 1 can thus be used indiscriminately in a hospital environment by nursing staff and at home for autonomous use.

[0046] An additional brake control can be arranged on the mast3de so that it can be operated by a third person. Alternatively or in addition, a foot brake control can be arranged on the chassis to be used by a third person.

The assistance device 1 as described here can be used in different configurations. The patient, at home, can use it completely independently, to get up from a fall, to get up from an armchair and go from one place to another, or to facilitate daily life by allowing adapt the height of the seat. The patient can thus easily access his lowest cupboards, or on the contrary to high shelves without risking loss of balance or excessive effort. The assistance device1 does not exclude the help of third parties. The mast 3 and/or the backrest 41 can be provided with one or more handles allowing a third party to manipulate the assistance device 1 while the patient is installed there. Medical staff can also use the assistive device1 in their daily work with their patients. The assistance device1 can be used in several versions, motorized or not, depending on the intended uses.

Reference numbers used in the figures

[0048] 1 Assistance device 2 Chassis 21 Beam 21a Long portion 21b Short portion 22 Crosspiece 3 Mast 31 Anchoring pillar 32, 32a, 32b Mobile supports 4 Seat 41 Backrest 410 bottom 410a, 410b Side frames 411a, 411b Central frames 412 Front 414a, 414b Connection buttons 415 Lower part of the backrest 42 Seat 420a, 420b Axles 43 Armrest 44 Brake control 441 Braking means 442 Cable 5, 5a, 5b, 5c, 5d Wheels

Claims (10)

1. Assistance device (1) comprising a frame (2), surmounted by a single mast (3) to which is fixed a seat (4), the mast comprising an anchor pillar (31) to the frame and at least a movable support (32) to which the seat (4) is fixed by its backrest (41) so that its lower part (415) remains free at least over a height equal to the height of the frame, the seat comprising a seat ( 42) flexible fixed to two axes (420a, 420b), the mast being able to be deployed from a retracted position, where the seat (42) of the seat (4) is in contact with the ground, towards a deployed position where the seat of the seat (4) is at a height of between about 50 cm and 1 m, and vice versa. 2. Device according to claim 1, the seat back (4) comprising a bottom (410), at least one central frame (411a, 411b) two side frames (410a, 410b) and a front (412), the at least a central frame and the side frames being arranged parallel to the mast (3), between the bottom (410) and the front (412) and the side frames being fixed at their lower part to the axes (420a, 420b) of the seat. 3. Device according to claim 2, said side frames being longitudinal plates whose width forms a right angle with the bottom (410) and the front (412) of the backrest (41) and is oriented in the same plane or a parallel plane to the axes (420a, 420b) of the seat. 4. Device according to one of claims 2 to 3, the seat comprising at least one retractable armrest (43) between a support position and a retracted position, each at least one retractable armrest (43) being fixed to the seat by means a connection button (414a, 414b) arranged on the outer face of the side frames (410a, 410b) corresponding. 5. Device according to claim 4, the lateral reinforcements (410a, 410b) being widened at the place of attachment of the connecting buttons (414a, 414b) so as to increase the contact surface thereof. 6. Device according to one of claims 2 to 5, the at least one central reinforcement (411a, 411b) comprising at least one attachment point (413a, 413b) to the mast (3). 7. Device according to claim 6, comprising two or three fixing points (413a, 413b) arranged on the upper portion of the central reinforcement(s) corresponding to half or two thirds of their total length so as to leave the part free. bottom (415) of the backrest (41). 8. Device according to one of claims 1 to 7, the frame comprising a crosspiece (22) arranged between two beams (21), said crosspiece being hollow and comprising at least one fishplate (222a, 222b) serving as an anchor for the mast (3). 9. Device according to one of claims 1 to 8, the frame comprising at least one fixed wheel (5a, 5b) and a brake system (441) operable by a control (44) arranged on one of the armrests (43 ) or accessible remotely from the assistance device (1). 10. Device according to claim 9, the device comprising a motor suitable for driving the at least one fixed wheel (5a, 5b), the control (44) making it possible to control the movement and the braking of the device (1) by said engine.