Orthopedic walking aid device comprising motorized means and means of spreading the patient's thighs

Abstract

The invention relates to a patient walking aid device (D) comprising a frame (1) equipped with wheels (11; 13), a saddle support (7) mounted on said frame (1), two movable segments (91, 93) arranged on either side of said saddle support (7) and belonging to a pedal assembly (90), characterized in that each movable segment (91, 93) is articulated about an axis (91'', 93'') transverse to said frame (1) and slides along parallel longitudinal rails, said walking aid device (D) further comprising a foot or leg support element (6) and means (8) for separating the patient's thighs arranged on either side of said saddle support (7), said separating means (8) following the alternating movement of the patient's lower limbs held by said support elements (6) and by said means of spacing (8) when the patient is positioned on said device. Figure for the abbreviation: Fig. 1

Description

Title of the invention: Orthopedic walking aid device comprising motorization means and means for spreading the patient's thighs Technical field of the invention

[0001] The present invention relates to an orthopedic device for assisting with walking and which can be used for rehabilitation of the type comprising at least a rigid frame, wheels, a pedal assembly and a saddle. Prior art

[0002] Document EP3598961 describes an orthopedic device for assisting with walking and which can be used for gait rehabilitation, in particular for patients with multiple disabilities and motor problems. This device comprises a base which has casters, a saddle support equipped with a saddle and articulated arms arranged on either side of the saddle support. The end of each of the articulated arms comprises a wedging element for the patient's foot or leg which is mounted adjustable in position according to the width of the base. This wedging element makes it possible to spread the patient's legs on either side of the saddle, thus avoiding friction between the saddle and the patient's thighs.

[0003] However, it turns out that for some patients, it is necessary to spread both the patient's thighs and legs. Indeed, for people who have low muscle tone, a single point of blockage in the thighs or in the leg creates tension on the patient's knees because the legs are no longer aligned with the thighs.

[0004] Furthermore, the aforementioned document describes a motorized embodiment of the device. In this embodiment, the articulated arms have a motor on each of their joints. These motors must then be controlled to simulate walking and drive the patient's lower limbs. It turns out that because there are too many motors, controlling them for the purpose of simulating walking is complicated. In addition, these motors are fragile and it is difficult to connect them to a power source. It also turns out that the device described in the aforementioned document is difficult to steer, either by the patient or by a caregiver who pushes the device. Finally, when the device is equipped with a toe-clip sole, the patient has difficulty moving and encounters problems changing direction.

[0005] Document WO2012 / 049442 describes a walking rehabilitation device which comprises a base equipped with rollers spaced along the width and length of the base. This device comprises a harness which supports the patient's buttocks. The patient's thighs are inserted into straps that cannot be moved apart. This device therefore does not allow the patient's thigh spacing to be adjusted and it does not have a pedal.

[0006] Document JP2007014698 describes a device that allows the patient to walk. This device does not include a saddle holder, nor an element for wedging the patient's foot or leg that is adjustable and biocable in position according to the width of the device. This device also does not include a pedal assembly.

[0007] Furthermore, document US9907721 describes a device which does not include any means of wedging the patient's leg or thighs. This device also does not include a pedal assembly.

[0008] Furthermore, document CN107874984 describes a walking aid device which comprises a belt holding the patient. The patient's legs are held at two uprights of the support, which cannot be separated. This device does not comprise a pedal assembly.

[0009] Finally, document KR2018 0123939 describes a walking aid device which comprises an exoskeleton mounted on a mobile support comprising casters. The two uprights on which the patient's lower limbs are fixed cannot be moved apart from each other, so as to adjust the spacing of the patient's thighs. This device does not include a pedal assembly.

[0010] An object of the present invention is to resolve any of the drawbacks associated with the use of the device of the prior art.

[0011] In particular, an aim of the present invention is to propose a walking aid device which comprises a pedal assembly and makes it possible to adjust the spacing of the patient's thighs and feet / legs. Such a device makes it possible to adapt perfectly to the patient's morphology and pathology. Indeed, the presence of the pedal assembly implies precise positioning of the different parts of the patient's lower limbs so as not to cause injuries when using the device. Presentation of the invention

[0012] The present invention aims to remedy these drawbacks with a completely innovative approach.

[0013] To this end, according to a first aspect, the present invention relates to a device for assisting a patient in walking, comprising a chassis equipped with casters spaced along the width and length of said chassis, a saddle support surmounting said chassis and extending substantially vertically, said device for assisting walking comprising two mobile segments arranged on either side of said saddle support and belonging to a pedal assembly, characterized in that each mobile segment is articulated around an axis transverse to said chassis and slides along longitudinal rails. parallel tudinals, said walking aid device further comprising an element for wedging the patient's foot or leg and means for spreading the patient's thighs arranged on either side of said saddle support, said spreading means following the alternating movement of the patient's lower limbs held by said wedging elements and by said spreading means, when the patient is installed on said device.

[0014] The presence of the means for spreading the patient's thighs or legs makes it possible to correctly position the patient's thighs, legs, knees and feet in an alignment that respects the physiology of the joints. The knees in particular can thus be placed in a position that does not prevent walking and does not cause injury to the joint. The spreading means also make it possible to correct the position of the patient's hips, which determines the position of the patient's lower limbs. The element for wedging the leg or foot and the means for spreading the thighs or leg thus form means for guiding the leg during the walking movement.

[0015] The invention is implemented according to the embodiments and variants set out below, which are to be considered individually or in any technically effective combination.

[0016] According to an alternative embodiment, said thigh spreading means comprise two lower lateral plates mounted parallel to each other on the seat post, on either side of the latter, said lower lateral plates respectively supporting elongate arms to which supports for the thigh or leg receptacle are fixed, said elongate arms pivoting synchronously from front to back and vice versa around a first upper transverse axis and using connecting rods pivoting around secondary axes to alternately move from a first position to a second position, the rotation of one elongate arm in one direction causing the rotation of the other opposite arm in the opposite direction, and vice versa.

[0017] This solution makes it possible to accompany the patient's walking movement by guiding their alternating movements while maintaining their thighs in a determined position and imposing a natural and fluid gait.

[0018] Advantageously, each lower side plate is fixed to a double central jaw enclosing the seat tube and is angularly adjustable individually relative to said central jaw.

[0019] This solution makes it possible to adapt the device to different patient morphologies, and in particular the length of their stride.

[0020] More specifically, each lower side plate has arcuate adjustment slots cooperating with screws fixed to the central double jaw.

[0021] According to another aspect of the present invention, each lower lateral plate is crossed in its thickness by an arcuate guide groove inside which slide pairs of rings secured to the elongate arms.

[0022] This solution allows for fluid and guided movement of the long arms and the most natural gait possible for the patient.

[0023] Preferably, each arcuate guide groove comprises front and rear stops against which the rings can bear respectively in the first and third positions.

[0024] This solution thus makes it possible to limit the patient's movements.

[0025] According to another characteristic of the present invention, each elongated arm comprises a pair of stabilizing and guiding pads constantly bearing against external lateral faces of the corresponding lower lateral plates.

[0026] This solution prevents rehabilitation from being carried out correctly, for example with sudden jolts or untimely lateral movements.

[0027] According to a particular embodiment, combinable with any of the embodiments of the invention, said device comprises means for driving the arms forming the pedal assembly, said drive means being adapted to alternately drive said movable arms in a rotational movement combined with a translation. The pedal assembly being activated due to an external force, it causes the device of the invention to move and the patient to walk. The drive means may, for example, be means for alternately driving the ends of the movable arms in rotation. The alternate drive is obtained by means of gears chosen and known to those skilled in the art.

[0028] In particular, the device comprises a single and common motorization device for controlling both the alternating movement of the pedal assembly and the movement of the rear wheels.

[0029] More specifically, the motorization device comprises a central motor driving on the one hand the arms of the pedal assembly via a first belt connected to a first geared motor and on the other hand the rear wheels via a second belt connected to a second disengageable geared motor.

[0030] According to an alternative embodiment, the device comprises a first central motor driving the arms of the pedal assembly and independent motors for driving each rear wheel.

[0031] In particular, the device provided with a joystick / manual pilot lever integrated into an arm rest and piloting one and / or the other of the motors.

[0032] According to a particular embodiment, each element for wedging the patient's foot comprises a spring-loaded front leg piece for exerting an elastic return force on the lower part of the patient's leg, in particular from below the knee. Brief description of the figures

[0033] Other advantages, aims and characteristics of the present invention emerge from the following description given, for explanatory and in no way limiting purposes, with reference to the appended drawings, in which:

[0034] [Fig.l] represents a general perspective view of a motorization variant

[0035] [Fig.2] represents another general perspective view of [Fig.l];

[0036] [Fig.3] represents a detail view of [Fig.l];

[0037] [Fig.4] represents a general perspective view of another motorcycle variant rization;

[0038] [Fig.5] represents a detail view of [Fig.4];

[0039] [Fig.6] represents a general perspective view of another motorcycle variant rization;

[0040] [Fig.7] represents a three-dimensional view of a device for holding the patient's thighs in a first position of use;

[0041] [Fig.8] represents another three-dimensional view of the holding device of [Fig.7];

[0042] [Fig. 9] represents a three-dimensional view of the holding device of figures 7 and 8 but in a second intermediate position of use;

[0043] [Fig. 10] represents another three-dimensional view of the holding device of [Fig.9];

[0044] [Fig. 11] represents a three-dimensional view of the holding device of Figures 7 to 10 in a third position of use;

[0045] [Fig. 12] represents another three-dimensional view of the holding device of [Fig. 11]; and

[0046] [Fig. 13] represents a three-dimensional detail view of a part of a pedal assembly of the device of the present invention. Description of the embodiments

[0047] Figures 1 to 3 relate to a first embodiment of a walking aid device D equipped on the one hand with a motorization member 200 and on the other hand with a device 8 for spreading the thighs of a patient.

[0048] This walking aid device D comprises a rigid mechanically welded chassis 1, such as a longitudinal central beam, resting on two rear drive wheels 11 and two front directional casters 13 mounted to pivot freely around a vertical axis, the rear wheels 11 being significantly further apart than the front wheels 13. The device D also comprises a seat post 7 which extends vertically and on which a saddle made for example of plastic (polymer) can be fixed, and a 2 handlebar to steer it manually, when possible.

[0049] For the sake of clarity, the saddle is not shown in the figures. The saddle support 7 comprises a hollow tube 71 which extends horizontally along the length of the device D and of which a sliding part 71' extends downwards. A front tube 73 erected vertically from the horizontal hollow tube 71 is also provided for placing an element for retaining and / or supporting the patient's bust.

[0050] The walking aid device D is also equipped with a pedal system 90 comprising in particular two parallel longitudinal segments 91 and 93, the front ends 91' and 93' of which have slides mounted to slide linearly along parallel longitudinal rails 10 belonging to the central beam 1 and the rear ends of which are articulated on axes 91” and 93” connected to lateral cranks 204 belonging to a motorization member 200 described in more detail later.

[0051] Furthermore, the pedal assembly 90 comprises right and left pedal rods 4 each sliding linearly along a corresponding segment 91 or 93 simultaneously with the combined sliding movement (along the rails 10) and rotation (around the rear axles 91” and 93”) of the latter thanks to the motorization system 200.

[0052] Each pedal rod 4 carries a lateral toe clip 6, preferably adjustable in width and height (relative to the ground). The toe clip 6 is preferably mounted so as to be able to rotate on the lower end of the corresponding pedal rod 4 (right or left). The angular position of the toe clip is also preferably variable and can be fixed in a chosen position. Angular locking means (not shown) which make it possible to lock its angular position relative to the pedal rod 4 can therefore be provided.

[0053] In all embodiments, the foot clip 6 comprises means for fixing the patient's foot which are not shown in the aforementioned figures, for the sake of clarity and simplification. A spring-type shock absorption system may also be integrated into the pedals between the segments and the foot clips 6, as illustrated in [Fig. 13].

[0054] In the first design mode, the motorization member 200 comprises a single central motor 201 secured to a rear part of the device D and supplied with current by an electric battery 51 mounted at the rear and above the central beam 1. This battery 51 is possibly removable and can be recharged without the presence of the device of the invention.

[0055] The central motor 201 is connected on the one hand to the pedal assembly 90, and in particular to the segments 91 and 93 using a first toothed belt 202 engaged with a first geared motor 203 secured to the crank 204 and, on the other hand, to the axle motor 205 of the rear wheels 11 using a second toothed belt 206 engaged with a second geared motor 207. A brake system 208 for lack of current is also provided on the drive axle 205 to secure the device D on slopes.

[0056] The central motor 201 thus makes it possible to drive the lateral cranks 204 in rotation, which cause the segments 91 and 93 to pivot around the axes 91” and 93” while making them slide along the rails 10 of the central beam 1, which activates the sliding of the pedal rods 4 along the segments 91 and 93 in a regular and repetitive linear alternating movement. The central motor 201 also makes it possible to drive the rear wheels 11 in rotation around the axle 205 in order to move the walking assistance device D forward / backward.

[0057] In this first mode, the ratio between the speed of movement and the speed of the pedal assembly is therefore fixed. The motorization member 200, that is to say the central motor 201, therefore makes it possible both to rotate the pedal assembly for rehabilitation and assistance with walking, but also to move the device D forward. The traction transmission to the rear wheels 11 can be disengaged and allow rehabilitation while stationary, with the device D immobile and the pedal assembly 91 / 93 rotating. This motorization architecture is more particularly suited to patients who can use their arms to accelerate and steer the vehicle using the handlebars 2.

[0058] Figures 4 and 5 relate to a second embodiment of the motorization member 200 of the walking assistance device D.

[0059] In this second embodiment, the motorization member 200 comprises a first central motor 211 secured to a rear part of the device D and connected only to the segments 91 and 93 of the pedal assembly 90 using a first toothed belt 212 engaged with a first geared motor 213 secured to a crank 214, and two secondary motors 221 and 222 each connected to a corresponding rear wheel 11. A current failure braking system is also integrated in each secondary motor 221 and 222 in order to secure the vehicle D on slopes. This configuration provides the same functionalities as the first embodiment but also makes it possible to decouple the forward speed of the vehicle (secondary motors) and the speed of the pedal assembly (main motor). This motorization architecture is more particularly suited to patients who can use their arms to accelerate and steer the vehicle using the handlebars 2.

[0060] [Fig. 6] relates to a third embodiment of the motorization member 200 of the walking assistance device D.

[0061] In this third mode, the motorization member 200 comprises a first central motor 231 connected only to the segments 91 and 93 of the pedal assembly using a first toothed belt 232 engaged with a first geared motor 233 secured to a crank 214, and two secondary motors 241 and 242 connected to each of the wheels rear. An armrest 245 is mounted on the seat post 7 and includes a joystick 247 for controlling the secondary motors 241 and 242. The central motor 231 can operate alone to allow rehabilitation without moving, while remaining seated on the vehicle D. A power failure braking system is also integrated into each secondary motor 241 and 242 to secure the vehicle on slopes. This motorization architecture is suitable for patients who cannot use their arms to accelerate and steer the vehicle, which is therefore piloted using the joystick 247. The vehicle D turns thanks to the difference in speeds between the right and left motorized rear wheels 11.

[0062] Figures 7 to 12 show in more detail the means 8 for spreading the patient's thighs illustrated in Figures 1 to 6, which are illustrated in three different typical positions of use.

[0063] More precisely, figures 7 and 8 show the spacing means 8 in a first position in which the patient's right thigh is placed forward, and the left thigh is placed, on the opposite side, backward, in the direction of movement of the orthopedic walking aid device.

[0064] Figures 9 and 10 show the spreading means 8 in a second intermediate position, called median, in which the right and left thighs are placed substantially opposite each other after their respective movements.

[0065] Finally, figures 11 and 12 show the spacing means 8 in a third position in which the right thigh is placed behind while the left thigh is placed, on the opposite side, forward, always in the direction of movement of the orthopedic walking aid device.

[0066] The following description relates more specifically to these three different positions.

[0067] In Figures 7 and 8, the spacing means 8 firstly comprise a first pair of lower right 101a and left 101b metal side plates fixed to the saddle support rod 7 (not shown), symmetrically and on either side thereof. These lower side plates 101a and 101b are typically thick metal sheets, for example stainless steel measuring several millimeters thick, and each have a generally arcuate shape (portion of an angular sector).

[0068] These first lower lateral plates 101a and 101b are for example identical and are fixed parallel to each other on a central vertical double jaw 102 clamped around the seat tube 7. The lower lateral plates 101a and 101b are moreover adjustable from front to back relative to the central double jaw 102 (and therefore also relative to the seat post 7) ​​by means of fixing means 103 such as screws. Each lower lateral plate 101a and 101b is thus fixed in four different zones 104 (front top, front bottom, rear top, rear bottom) on the jaw central 102 by means of two pairs of screws 103. Each fixing zone 104 is in the present case in the form of a slot in the form of a domestic arc through the thickness of each lower lateral plate and receiving a screw 103, which in particular makes it possible to adapt the spacing means 8 to the morphology of the patient by tilting / pivoting the lower lateral plates 101a and 101b back and forth relative to the seat post 7 before tightening the pairs of screws 103. Preferably the right lower lateral plate 101a and the left lower lateral plate 101b are arranged at the same level.

[0069] Each of the lower lateral plates 101a and 101b carries respectively an elongate arm 105a and 105b in the form of a perforated rigid metal strip (for example made of stainless steel several millimeters thick) on which is fixed a support 106a / 106b for a U-shaped receptacle 94a intended to receive the thigh (right or left depending on the plate / strip) of the patient. As for the lower lateral plates 101a and 101b, the right 105a and left 105b elongate arms are arranged parallel to each other on either side of the seat post 7.

[0070] The right elongate arm 105a has a right connecting tab 112a with a corresponding lower lateral plate 101a. More precisely, the right lower lateral plate 101a is provided with a right arc-shaped through groove 107a inside which slide a pair 113a of front and rear guide rings, these rings being moreover each screwed onto a corresponding connecting tab 112a.

[0071] Similarly, the left elongate arm 105b has a left connecting tab 112b with a corresponding lower side plate 101b. More precisely, the left lower side plate 101b is provided with a left arc-shaped through groove 107b inside which slide a pair 113b of front and rear guide rings, these rings being moreover each screwed onto a corresponding connecting tab 112b.

[0072] The lower right side plate 101a is also provided with a pair 108a of front and rear stops (depending on the direction of movement of the orthopedic walking aid device) against which the front and rear rings 113a come to bear respectively when they slide inside the right arcuate groove 107a between the first and third extreme positions.

[0073] Similarly, the lower left side plate 101b is provided with a pair 108b of front and rear stops (depending on the direction of movement of the orthopedic walking aid device) against which the front and rear rings 113b come to bear respectively when they slide inside the left arcuate groove 107b between the first and third extreme positions.

[0074] Furthermore, the right elongated arm 105a is articulated around a first upper transverse axis 120a passing through the hollow tube 71 and is connected to a lower front part 71' of said hollow tube 71 of the seat post 7 using a system of front connecting rods which are articulated respectively around transverse axes parallel to each other and to the upper transverse axis 120a.

[0075] More precisely, a first large straight right connecting rod 115a extends between a first right pivot axis 117a linked to the long right arm 105a and a second right pivot axis 118a, while a second small straight right connecting rod 116a extends between the second right pivot axis 118a and a third right pivot axis 119a, which is linked to the lower front part 71' of the hollow tube 71. The second right pivot axis 118a is said to be "free" because it is not connected to any part other than the two connecting rods 115a and 116a.

[0076] Similarly, the left elongated arm 105b is articulated around a first upper transverse axis 120b passing through the hollow tube 71 and is connected to a lower front part 71' of said hollow tube 71 of the seat post 7 using a system of front connecting rods which are articulated respectively around transverse axes parallel to each other and to the upper transverse axis 120b.

[0077] More precisely, a first large left connecting rod 115b, this time in the shape of an “L”, extends between a first left pivot axis 117b linked to the elongate left arm 105b and a second left pivot axis 118b, while a second small straight left connecting rod 116b extends between the second left pivot axis 118b and a third left pivot axis 119b linked to the lower front part 71' of the hollow tube 7. The second left pivot axis 118b is said to be “free” because it is not connected to any part other than the two connecting rods 115b and 116b.

[0078] The two third pivot axes of right 119a and left 119b are collinear.

[0079] Finally, pairs of right 130a and left 130b guide and stabilization pads in the shape of a half sphere / ball are respectively connected to a lower part of each of the right 105a and left 105b elongated arms, below the right 112a and left 112b connecting tabs. These right 130a and left 130b guide pads respectively bear permanently against an external lateral face (also called rolling surface) of each of the right 101a and left 101b lower lateral plates throughout the alternating forward and backward movement of said right 105a and left 105b elongated arms relative to said plates, in order to accompany the movement explained in more detail below.

[0080] Thus, Figures 9 and 10 illustrate the second intermediate median position presented previously and in which: - the left elongated arm 105b has pivoted forwards around the first upper left transverse axis 120b so as to advance the left support 106b of the receptacle 94b, causing the patient's left thigh to move forward and the left rings 113b to slide forwards in the left arcuate groove 107b of the left lower lateral plate 101b, and - simultaneously, the right elongated arm 105a pivoted backwards around the first upper right transverse axis 120a so as to move the right support 106a back from the receptacle 94a, causing the patient's right thigh to move back and the right rings 113a to slide backwards in the right arcuate groove 107a of the right lower lateral plate 101a.

[0081] These two opposite and simultaneous movements of the elongated arms 105a and 105b (one pivoting forwards causing the other to pivot backwards) are accompanied by the sliding of the pads 130a and 130b on the respective external lateral faces of the right 101a and left 101b plates.

[0082] During these synchronized movements, the right connecting rods 115a / l 16a and the left connecting rods 115b / 116b also pivoted relative to their respective right 117a / l 18a / l 19a and left 117b / l 18b / l 19b axes in order to find themselves in the second position.

[0083] It is this set of front connecting rods, guide pads and rings cooperating with the guide through slots which allows the movement of the elongated arms 105a and 105b, and therefore of the patient's thighs, to be fluid, natural, stable, guided, and with a minimum of friction.

[0084] In this second intermediate median position, the elongated arms 105a and 105b, and therefore the patient's thighs, are substantially facing each other on either side of the seat post 7.

[0085] Finally, figures 11 and 12 illustrate the third position of this mobile assembly in which: - the left elongated arm 105b continued to pivot forwards around the first upper left transverse axis 120b so as to advance the left support 106b of the receptacle 94b, causing the patient's left thigh to move forward and the left rollers 113b to slide forwards in the left arcuate groove 107b of the left lower lateral plate 101b until the left front roller 113b comes to bear against the left front stop 108b, and - simultaneously, the right elongated arm 105a continued to pivot backwards around the first upper right transverse axis 120a so as to move the right support 106a back from the receptacle 94a, causing the patient's right thigh to move back and the right rollers 113a to slide backwards in the groove right arched 107a of the right lower side plate 101a until the right rear roller 114a comes to bear against the right rear stop 109a.

[0086] During these synchronized movements, the right connecting rods 115a / l 16a and the left connecting rods 115b / 116b also continued to pivot relative to their respective right 117a / l 18a / l 19a and left 117b / l 18b / l 19b axes in order to find themselves in the third position.

[0087] It is this set of anterior connecting rods, guide pads and rings cooperating with through slots which allows the movement of the patient's long arms and thighs to be fluid, natural, stable, guided and with a minimum of friction.

[0088] Thus, throughout the patient's movement using the walking aid device D according to the invention, an alternating movement of the right long arm / right thigh - left long arm / left thigh is carried out, the advancement of one long arm / one thigh causing the other long arm / the other thigh to move backward, and vice versa. With this kinematics, it is even possible to move backward and not forward, the recoil of one thigh causing the opposite thigh to move forward, and vice versa.

[0089] The pedal assembly and the means for spreading the patient's thighs of the walking aid device D produce the walking movements independently of the position in space of the patient's hip and knee joints, so that the operation is not influenced by the size of said patient.

[0090] Furthermore, an adjustment at the level of the connecting rods makes it possible to lengthen and / or raise the patient's step.

[0091] Finally, the pedal unit also works without motorization, by pushing the walking aid device D via an assistant.

[0092] [Fig. 13] illustrates in detail a part of the pedal assembly 90 and in particular the pedal rods 4 and the associated toe clips 6. Each toe clip 6 is each equipped with a support leg piece 16 provided with an internal torsion spring (not shown) capable of pivoting around a transverse axis 18 linked to the toe clip 6 so as to form an elastic return member exerting a force on the lower part of the patient's leg, from below his knee. The role of this leg piece 16 is thus to straighten the patient's leg when his position is substantially perpendicular to the ground.

[0093] It should be clearly understood that the detailed description of the subject of the Invention, given solely by way of illustration, does not constitute in any way a limitation, the technical equivalents also being included in the scope of the present invention.

Claims

Claims

1. Device (D) for assisting a patient in walking, comprising a chassis (1) equipped with wheels (11; 13) spaced along the width and length of said chassis, a rod-shaped saddle support (7) surmounting said chassis (1) and extending substantially vertically, said walking aid device (D) comprising two mobile segments (91, 93) arranged on either side of said saddle support (7) and belonging to a pedal assembly (90), each mobile segment (91, 93) being articulated around an axis (91”, 93”) transverse to said chassis (1) and sliding along parallel longitudinal rails (10), said walking aid device (D) further comprising an element (6) for wedging the patient's foot or leg and means (8) for spreading the patient's thighs arranged on either side of said saddle support (7),said spreading means (8) following the alternating movement of the patient's lower limbs held by said wedging elements (6) and by said spreading means (8) when the patient is installed on said device, characterized in that said thigh spreading means (8) comprise two lower lateral plates (101a, 101b) mounted parallel to each other on the saddle post (7), on either side of the latter, said lower lateral plates (101a, 101b) respectively supporting elongate arms (105a, 105b) to which are fixed supports (106a, 106b) for thigh or leg receptacles (94a, 94b), said elongate arms (105a, 105b) pivoting synchronously from front to back and vice versa around of a first upper transverse axis (120a, 120b) and using connecting rods (115a, 115b, 116a, 116b) pivoting around secondary axes (117a, 117b, 118a, 118b, 119a,119b) to alternately move from a first position to a second position, the rotation of an elongate arm (105a; 105b) in one direction causing the rotation of the other opposite arm (105b; 105a) in the opposite direction, and vice versa.,

2. Device according to claim 1, characterized in that each lower lateral plate (101a, 101b) is fixed on a double central jaw (102) gripping the seat post (7) and is angularly adjustable individually relative to said central jaw (102).

3. Device according to claim 2, characterized in that each lower side plate (101a; 101b) has arcuate adjustment slots (104) cooperating with screws (103) fixed to the central double jaw (102).

4. Device according to any one of claims 1 to 3, characterized in that each lower lateral plate (101a, 101b) is crossed in its thickness by an arcuate guide groove (107a, 107b) inside which slide pairs of rings (113a, 113b) integral with the elongate arms (105a, 105b).

5. Device according to claim 4, characterized in that each arcuate guide groove (107a; 107b) comprises front and rear stops (108a; 108b) against which the rings (113a; 113b) can bear respectively in the first and second positions.

6. Device according to any one of claims 1 to 5, characterized in that each elongate arm (105a, 105b) comprises a pair of stabilizing and guiding pads (130a, 130b) in constant support against external lateral faces of the corresponding lower lateral plates (101a, 101b.

7. Device according to any one of the preceding claims, characterized in that it comprises means for driving said segments (93; 91) forming the pedal assembly, said driving means being adapted to alternately drive said mobile segments (93; 91) in a rotational movement combined with a translation.

8. Device according to claim 7, characterized in that it comprises a single and common motorization device (201) for controlling both the alternating movement of the pedal assembly (91, 93) and the movement of the rear wheels (11).

9. Device according to claim 8, characterized in that the motorization device comprises a central motor (201) driving on the one hand the segments (91, 93) of the pedal assembly via a first belt (202) connected to a first geared motor (203) and on the other hand the rear wheels (11) via a second belt (206) connected to a second disengageable geared motor (207).

10. Device according to claim 7, characterized in that it comprises a first central motor (211) driving the segments of the pedal assembly and independent motors (221, 222) for driving each rear wheel (H).

11. Device according to claim 10, characterized in that it is provided with a joystick / manual control lever (247) integrated into an arm rest (245) and controlling one and / or the other of the motors.

12. Device according to any one of the preceding claims, characterized in that each element (6) for wedging the patient's foot comprises a front spring-loaded leg piece (16) for exerting an elastic restoring force on the lower part of the patient's leg, in particular from below his knee.

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