FR2860430A1 - Wheelchair for hemiplegic, has tubular support axle that receives pusher whose end includes groove having locking ball that penetrates and projects with respect to opening formed at end of axle - Google Patents

Abstract

The wheelchair has two devices (D1, D2) incorporating a hub (2) and a hub brake (3). Each device has a tubular support axle on which the hub and a support of the hub brake are supported. The axle of the device (D1) receives a pusher whose end has a groove that houses a locking ball that penetrates and projects with respect to an opening formed at an end of the axle.

Description

WHEELCHAIR FOR HEMIPLEGICS WITH

DEVICES FOR BRAKING

  The invention relates to the technical sector of wheelchairs 5 for the disabled and more particularly the hemiplegic persons.

  It is recalled beforehand that these chairs are arranged with in particular handrails arranged from the wheel rim spoke wheelchair and a training system to be seized by the disabled person, to advance or brake said chair. The applicant holds several French patents which he has been using for many years in the various applications, cycles and wheelchairs and in particular n 2671312, 2725128, 2731898, 2588513, 2548096.

  Thus, the applicant has developed rapid disassembly hubs in these applications. The implementation of braking could be established from drum brakes as taught by French Patent No. 2671312. In this case, against the brake control was established from each wheel with a specific arrangement of drum braking . According to this patent, the disabled person must or may intervene in braking on one or the other or both wheels at the same time but according to two independent actions simultaneous by the disabled person, or alternatively by a third person.

  The problem is, however, in the application of such braking devices on wheelchairs by people with hemiplegic disabilities, that is to say, who have the possibility of intervention or control only one hand so on one side.

  The applicant's approach was therefore to think and try to find a single braking control device for a wheelchair in a particular situation.

  The arrangement of the device described in French Patent 2671312 is not transferable directly to meet the purpose of the invention.

  The Applicant has also described in French Patent 2731898 a hemiplegic hub with two identical devices arranged overflow of each quick-mounting hub, said devices being connected by a deformable parallelogram connecting piece to obtain an active leader device and a passive led device. The braking is done by action on the handrail.

  Based on all of this prior art, the applicant has sought a solution that can meet the need sought unresolved to date, despite the teaching of the aforementioned prior art.

  The solution found in the device of the invention resides in a new implementation of certain means by specific arrangements that make it possible to respond to the problem posed and thus to propose a wheelchair for hemiplegic handicapped persons with a single brake drum brake control. , which has never been proposed to date on the market, the applicant being one of the world's leading manufacturers of this type of equipment.

  Thus, according to a first feature of the invention, the chair comprises two devices incorporating a hub and a drum brake, a first device being a leader and a second device being driven, and in that each device has a tubular support axis on which the hub and the drum brake support are introduced by rapid assembly and disassembly, and in that the two devices are coupled to one another by means of quick coupling means, and in that the 2860430 3 brakes drums of the two devices are solicited by a single command available to one side of the chair by the person transported.

  These and other features will be apparent from the rest of the description.

  For fixing the object of the invention illustrated in a non-limiting manner to the figures of the drawings in which: FIG. 1 is an exploded view according to the prior art of the patent FR No. 2671312 illustrating the adaptation of a drum brake; on a wheelchair hub.

  - Figure 2 is a view illustrating the adaptation of the device of the invention on both wheels next to a wheelchair. FIG. 3 combines, in half-views, a half-partial and large-scale view of the steering device mounted on a wheel of the wheelchair, this view being in partial longitudinal section, and a half-front view of said device.

  Figure 4 is a view similar to that of Figure 3, but the driven device.

  Figure 5 is a sectional view before mounting the driven device with the brake drum.

  In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the drawings.

  The wheelchair for hemiplegic receives from its fixed structure (1) at the wheels two devices (D1) and (D2) incorporating a hub (2) and a drum brake (3), a first device (Dl ) being a leader and the other second device (D2) being conducted. The two devices are coupled to one another by means of quick-coupling coupling means M, essentially by forced and tight fitting, so that the implementation of the first leading device (D1) in rotation causes rotation of the device. second device led. Moreover, the unique action on the two drum brakes of said devices causes the locking position of the chair.

  For a good understanding of the invention, each device (D1) and then (D2) and the connection means M will be successively described. The first leader device (D1) comprises a tubular support shaft (4) of great length, one end of which is arranged with a double shoulder (4a 4b), with end a crown (4c), from which is fixed in any suitable manner a first handrail (MC1). This tubular support shaft receives a pusher (5) of great length through the biased movement controlled and limited against an elastic spring means of the spring type. The end of the pusher has a not shown groove, serving as a housing for a locking ball (5a) capable of penetrating and protruding slightly with respect to an opening (4d) formed at the other end of the tubular support shaft (4), thus allowing rapid assembly or disassembly of the hub and the drum brake, by action on the pusher.

  According to a provision of the invention, the end (4e) of the tubular support shaft (4) has a cut-away configuration, for example with a hexagonal shape for coupling with the connecting means (M) mentioned above. .

  The tubular support shaft (4) is thus capable of receiving the hub (2) which is slidably and rotationally mounted. Said hub thus comprises a lateral disk flange (2.1) arranged on its periphery with openings for receiving the spokes of wheels (R) associated with the rim of the wheel, on the part of which will be disposed another handrail (MC2).

  2860430 5 The hub (2) fits on the range (4a) of small diameter and comes to bearing abutment on the edge of the scope (4a). The hub is extended on the other side and in a known manner with a cylindrical cap shape forming a braking cone (2.2) in which is positioned the drum brake (3) disposed on the braking support (7). Said hub has another disc flange (2.3) from which is disposed a new series of spokes.

  Internally, the hub receives rolling means (8a-8b). A first rolling means (8a) abuts against the edge opposite the portion (4a). The other bearing (8b) is at the front of the hub and is crimped or otherwise to prevent removal, or any other restraining means may be used.

  The braking device is applied to the frame and fixed frame (10) of the chair. More particularly, the drum brake support (7) is established in known manner as a plate having a central opening (7a) for the passage of a tubular sleeve (11) engaging itself on the basic support axis (4). The drum brake support plate has one or two tabs (7b) receiving the sheath stop (s) (12) and braking cables (13) depending on their positioning. On one side, the brake support plate (7) receives a cylindrical body (14) which is indexable in an opening (10a) formed on the frame structure of the chair frame. Said body is extended by an axis (14a) on the other side of the support plate to allow passage and fixing and articulation of the jaws (3a) of the drum brake (3). The support plate (7) also receives an overflow lever (15) mounted with a controlled and limited articulation capacity, said lever receiving the ends of the braking cable.

  Furthermore, said plate (7) is thus positioned and centered on said tubular sleeve (11). The latter is stepped and receives at the front (1 l a) of the rolling elements (16) while its rear part form (1 lb) at the end and is threaded. When the drum brake support plate (7) is positioned and indexed on the carrier structure (10) of the chair frame, the sleeve (11) projects and allows the positioning of a spacer ring (17) between the bearing structure and the shouldered head of the support sleeve, while then the other end is threaded to receive in turn a bearing (18) with a threaded portion fitting on the threaded portion and at the end the receipt of another rolling means (19). Said bearing forms the locking member of the assembly.

  It should be noted that when the hub (2) and the brake support (7) are mounted on the base support shaft, the assembly is held in position and locked by the ball (5a) located on the pusher (5), in the classical configuration of the quick assembly. In this construction, the base support shaft (4) is guided on two rolling means.

  It is first necessary to describe the second device (D2) which is led to it and passive.

  This device thus comprises a tubular support shaft (4) receiving a pusher (5) with the same arrangement as before and an end with hexagonal sides. The second support shaft receives the second hub (2) which is fixedly secured thereto in any suitable manner. Thus unlike the first hub which is free to rotate on the tubular support axis, the second hub is fixed, by the connection with the means (M) connection. The rotation of the driven hub is obtained through the connection of the means (M) with that of the leading hub.

  Regardless of this important difference, the second hub is identical to the previous one.

  The braking device is strictly identical to that provided on the first device and accordingly the same references are used.

  Thus, by this specific implementation, the invention makes it possible to produce a quick-mounting braking device for a hemiplegic chair incorporating two drum brakes controlled by a single manipulation of the user. In addition, the hubs are reversible in position to allow their adaptation left or right.

  The linking means (M) must now be described. This is established in the form of a spacer bar (21) substantially corresponding to and below the length or distance between the wheels of the wheelchair. This spacer bar at each of its ends receives sleeves (21 a), mounted retractable against a biasing means disposed on the spacer bar. Each sleeve has at the free end a sleeve (21b) incorporating a complementary hexagonal inner shape for male male fitting of the tubular support shaft of the devices (D1) and (D2). This gives an extremely fast assembly of the assembly.

  The advantage of this achievement lies in the possibility offered to the disabled person on the chair to ensure by one hand the control of the braking of the chair, either by the action of the handrails, 20 or by action on the brake lever to simultaneously control each side of the wheelchair. The brake lever controls the opening or tightening of the drum brakes.

  The advantages of this specific implementation, its reliability and its rapid assembly are emphasized.

Claims (2)

8 claims   -1- Wheelchair for hemiplegic wheel braking device, characterized in that it comprises two devices (D1) and (D2) incorporating a hub (2) and a drum brake, the first device (D 1) being leader and the second device (D2) being conducted, and in that each device (D1, D2) has a tubular support axis on which are introduced the hub and the drum brake support by rapid assembly and disassembly, and in that the two devices are coupled to each other by means of quick coupling means (M), and in that the drum brakes of the two devices are solicited by a single control available on one side of the chair by the person transported.   -2- wheelchair according to claim 1, characterized in that the devices (Dl) and (D2) comprise a tubular support shaft (4) of great length, one end is arranged with a double shoulder (4a-4b) allowing the positioning the hub (2), the hub (2) of the device (D1) being mounted free to rotate relative to rolling elements, the hub (2) of the device (D2) being fixedly mounted on the tubular support shaft which it is associated with it, and in that each braking device is applied to the structure and fixed frame of the chair, including a drum brake support plate (7) including a body (14) engaged by indexing on the fixed structure of the chair. frame (10), and in that the plate (7) is positioned and centered on a tubular sleeve mounted to roll around the tubular support shaft (4).   Armchair according to claim 2, characterized in that the tubular sleeve (11) is shouldered and receives at the front (Il a) rolling elements (16) while its rear part forms carried to the end being threaded, and in that a spacer (17) is disposed on the sleeve between the carrier structure to the frame and the shouldered head of the sleeve, and in that a bearing (18) with threaded portion fits on said threaded portion, a rolling means (19) being disposed in the bearing, said bearing providing a blocking function of the assembly.   -4- Chair according to claim 1, characterized in that the connecting means is established on the form of a spacer bar (21) receiving at each end of the sleeves (21a) retractable against a means return, each sleeve having at the free end a sleeve (2lb) incorporating a complementary hexagonal shape by female male fitting with the ends of the support pins (4).