JP2016529073A5 - - Google Patents

Description

Wheelchair removable coupling bar

  The present invention relates to a wheelchair. More particularly, the present invention relates to a wheelchair with a removable coupling bar, which includes an operating lever for adjusting the back angle and a wheelchair tilting device.

  Folding wheelchairs can be stored or parked in a folded state, and therefore have the advantage that they occupy less space than regular wheelchairs, especially when not in use. This is also advantageous, for example when trying to transport a wheelchair by car. Known folding wheelchairs include a scissor-like mechanism that connects two side portions of the wheelchair. A disadvantage of known folding wheelchairs is that, when unfolded, their structure is not sufficiently rigid. When a person is seated and used in a wheelchair, the wheelchair will feel somewhat shaky or staggered. For those who push wheelchairs, overcoming this wander uses energy. Therefore, a staggered wheelchair is heavier to push than a wheelchair with high mechanical rigidity because not all energy can be used to push the wheelchair forward. Therefore, there is a need for a folding wheelchair that has greater mechanical rigidity than known wheelchairs.

  Known wheelchairs may have a back, and the angle of the back relative to the seat, the back angle can be adjusted in stages or continuously variable. Changes in the angle of the back can be used, for example, because the back can be reclined when the user is asleep, and because the back can be fully upright when the user is about to eat. The comfort of the person. A known method of adjusting the back angle is to operate a control mechanism that may consist of one or more levers, sticks, or handles. This control mechanism can be arranged behind the back, for example on a handwheel handle of a wheelchair. The person adjusting the back must move behind the wheelchair and out of the wheelchair user's field of view to operate the control mechanism. Many wheelchair users have disabilities due to, for example, mental disorders, hearing loss, or dementia. These wheelchair users have a reduced perception. Caregivers providing caregiving will particularly prefer to align their gaze with the wheelchair user so that they can communicate more efficiently. When a nurse wants to turn his back, for example, a wheelchair user will not perceive that. The nurse moves behind the wheelchair and falls back, which arrives as a surprise to the wheelchair user, which feels uncomfortable. Accordingly, there is a need for a wheelchair having a control mechanism for the back that can be operated from several directions, particularly from the front of the wheelchair.

  In known folding wheelchairs, an operating lever for braking, setting the back angle and possibly tilting the seat, setting the seat angle is usually arranged on the handwheel handle of the wheelchair. Such operating levers are usually mounted vertically above each other on the handwheel. A problem with such an installation of the operating lever is that the wheelchair mechanisms are difficult to operate because they can interfere with each other and become confused. Therefore, it is required that the brake lever and the seat angle and the back angle can be arranged at appropriate intervals of the operation lever so as not to be confused.

  A wheelchair intended to provide care to a person in need of nursing should be simple and safe to use. It is desirable that a wheelchair can be used without training or with very little training. The function and operation of the wheelchair should be understood from the design and arrangement of the operating means. For example, the ascending point may be desirable to be clearly marked as the ascending point.

  Known folding wheelchairs utilize a mounting device for a removable legrest, which can include a male part in the form of a cylinder, which is usually placed in a female part consisting of a hollow tubular body. . A problem with this type of mounting device is that it can be difficult to place the cylinder in the female part. The reason is that the male part usually has a rounded or flat end, which means that the male part is positioned relatively accurately on the central axis of the female part for insertion into the female part. Because it is necessary. Also, the mounting device can be perceived as rattling or wobbling because there will always be a certain amount of gap between the male and female parts. Since this type of mounting device includes two concentric surfaces, a male outer jacket surface and a female inner jacket surface, this type of mounting device traces into an annular space between the two concentric jacket surfaces. Sensitive to foreign objects such as dust and dust that may arrive. When the foreign matter is in the annular space, there is a possibility that it is generally difficult to disassemble the mounting device. Also, this type of mounting device becomes sensitive to corrosion, which can occur on the jacket surface and can make these parts no longer free from each other. Accordingly, there is a need for a mounting device for a removable leg rest that facilitates placing the male portion within the female portion and that is easy to disengage when separation is desired.

  According to the prior art, an angle adjustable legrest for a folding wheelchair has a hinge axis that does not coincide with the rotation axis of the knee joint of the wheelchair user. The legrest can consist of a rod that is hinged at one end of a wheelchair seat frame, which includes a footrest at the opposite end. The position of the footrest is usually adjustable in the longitudinal direction of the legrest. When the rod is hinged to the wheelchair seat frame, the axis of rotation of the rod will be below the axis of rotation of the knee joint of the user sitting in the wheelchair. The problem with this type of adjustable angle legrest is that the length of the legrest is adapted to the length of the user's leg only when the legrest is in a particular position. When adjusting such a legrest for a wheelchair user, the angle of the legrest is usually adjusted to the desired first position, after which the footrest is displaced in the longitudinal direction of the legrest and used It is locked when it hits the sole of the person. If the legrest is swung up from the set first position, for example if it is desired that the legrest is placed in a horizontal position, the length of the legrest is therefore relative to the length of the user's leg. It will be too short. The footrest must be displaced in the longitudinal direction of the legrest in a direction away from the wheelchair seat portion until it is also adapted to the length of the user's leg. The opposite is the case when the legrest is initially set in a substantially horizontal position. When the legrest is lowered, the legrest length will be too long for the user's leg length and the position of the footrest must be adjusted again. Accordingly, there is a need for a wheelchair in which the pivot axis of the leg rest substantially matches the pivot axis of the user's knee joint.

  Known folding wheelchairs with removable leg rests and adjustable angle between the seat and the back, the leg rest cannot be lowered to the end, so that the angle between the seat and the leg rest Has the disadvantage that it is not 90 °. This is because a wheelchair scissor mechanism and a mechanism for adjusting the angle of the back are arranged under the seat to prevent the legrest from being 90 ° to the end. Over time, it is uncomfortable for the user to sit on a chair whose legs are always positioned somewhat forward. Also, if the legrest can be moved somewhat below the front edge of the seat, user comfort can be increased. Therefore, there is a need for a folding wheelchair that can lower the legrest to the end until it forms 90 ° with the seat, which is even more advantageous if the legrest can be placed somewhat under the front edge of the seat. .

  Known folding wheelchairs typically have a spine formed from a fabric-like material. The fabric can be made of, for example, a synthetic polymer material or a cotton fabric. To form the spine, the fabric is attached between the back struts of the wheelchair so that the fabric is stretched between the struts when the wheelchair to which the back fabric is applied is in an unfolded state. The fabric may be attached to the back by a sleeve or channel formed on the side of the fabric. The fabric can be slid down over the backrest column. This has the disadvantage that when the user is leaning against the cloth, the user's back may come into contact with the backrest post. The cloth assumes the shape of the user's back when the user sinks into the cloth, and the user's back contacts the backrest column. This contact with the backrest struts can be uncomfortable and the long contact time can cause a pressure ulcer on the user. This problem is the same when the fabric is attached to the backrest strut, for example with rivets inside or outside the backrest strut.

  Another drawback to the sleeve or channel at the side edge of the fabric for attachment to the backrest strut is that the backrest strut is obscured. This makes it more difficult to attach a device such as a handle to the backrest column. This can be somewhat corrected by providing the fabric channel or sleeve with a hole or slit to expose the backrest strut. Nevertheless, it is not possible to place the device at an optional height on the backrest column.

  Therefore, there is a need for an improved attachment of the fabric to the backrest strut that reduces user contact with the backrest strut and allows for a fully selectable placement of equipment along the backrest strut.

  It is known that wheelchairs can be equipped with tables or trays. The table is usually attached to a wheelchair armrest or frame. Known tables are removably attached to armrests or frames, for example with brackets or screws. It is also known to attach a table to a wheelchair with Velcro (registered trademark) (face fastener). When attaching a table to a wheelchair with a bracket, it is known that adjustment of the horizontal position of the table is performed by loosening the table, displacing the table and re-fixing the table, for example with screws. In the case of a known table, it takes time to perform mounting, disassembly and adjustment of the position of the table. Also, attaching a table and adjusting the table can be a problem for people sitting in a wheelchair. There is also a known table that can be removably mounted by sliding the table on a wheelchair armrest with rails attached to the table. Such a table can be difficult to keep in a fixed horizontal position. A device that facilitates sliding the table over the armrest also facilitates the user to displace the table along the armrest by unintentionally displacing the table. Accordingly, there is a need for a table that can be releasably attached to a wheelchair that allows the table to be locked in a desired position without the use of fixing means that must be operated.

  Folding wheelchairs that can adjust the angle of the back relative to the seat are known. The seat angle is also known as adjustable. This is often described as a wheelchair with a so-called recliner function. The mechanism for adjusting the back angle and the seat angle can be a variety of spring mechanisms including a gas spring disposed under the seat. Such a mechanism can be operated from a lever located on the handwheel handle of the wheelchair as described above. A hollow cable with an operating wire extends from the lever to the mechanism. Correspondingly, a hollow cable with an operating wire extends from the wheelchair brake lever to the wheel brake. Such a cable can jump out of the frame of the wheelchair and cause objects that fall between the cable and the wheelchair to catch on the wheelchair. Further, it is a problem that the mechanism for adjusting the back angle and the seat angle occupies the space under the seat, and the legrest becomes unmovable under the front edge of the seat as described above.

US Patent Application Publication No. 2008/157501 European Patent Application No. 2471499 Norwegian Patent No. 302015 Specification US Pat. No. 5,803,545

  The present invention has the object of improving or reducing at least one of the disadvantages of the prior art or at least providing a useful alternative to the prior art.

This object is achieved through the features specified in the following description and the following claims.
The invention is defined by the independent claims. The dependent claims define advantageous embodiments.

  In a first aspect, the invention relates to a removable coupling bar for a wheelchair, the wheelchair comprising two backrest columns, the coupling bar connecting these two backrest columns, the removable coupling bar being And at least one operation lever.

  At least one operating lever can operate a wheelchair tilting device. At least one operating lever can operate a back angle device of the wheelchair.

  At each end, the coupling bar can include one lock configured to be placed in a mounting groove in the backrest post. The operating lever can include a finger.

  A folding mechanism for a folding wheelchair configured to assume a folded state and an unfolded state is also described, wherein the wheelchair can include a seat and an articulated frame, the articulated frame comprising two A side member may be included, and the side member may be articulated to at least the first link mechanism and the second link mechanism, each link mechanism including at least the first link and the second link. Each link may be hinged to one side member at one end, the first link may be connected to the hinge element at its second end, and the second The link may be connected to the hinge element at its second end, the first link may form a first stop surface at its second end, At its second end The stop surface abuts the second stop surface when the wheelchair is in its unfolded state, and the hinge element projects from the hinge element in the folding direction. And the folding mechanism can further include a handle that is resiliently attached to the pin so that the handle is positioned on the side of the first link when the wheelchair is in its unfolded state. The surface and the side surface of the second link can be compressed elastically and lockably.

  The hinge element can consist of a hinge. The hinge element can consist of a third link, which can comprise a hinge at each end.

  The first and second links may be arranged substantially side by side in the longitudinal direction of the side member when the wheelchair is in its folded state.

  A rigid connection element may be attached to the first linkage at a first end and attached to the second linkage at its second end. In an alternative embodiment, the rigid connection element may be attached at a first end to the hinge element of the first linkage and at its second end to the hinge element of the second linkage. . The connecting element can form a pin at its second end.

  A folding wheelchair is also described, the wheelchair can comprise the folding mechanism described above, the wheelchair can further comprise a folding seat, the seat comprising a first seat support and a second seat support. It consists of a material in the form of a cloth that is attached to. In an alternative embodiment, the wheelchair can further comprise a seat between the first seat support and the second seat support, wherein the seat is made of a rigid material and the seat has one side edge. The hinge may be hinged to the first seat support. In other alternative embodiments, the seat can comprise a first seat plate and a second seat plate that are hinged together, the second seat plate further hinged to the second seat support. Connected, so that the seat projects above the seat support when the wheelchair is in its folded state, and the first and second seat plates are flat when the wheelchair is in its unfolded state. Form.

  The seat can further comprise a handle.

  The first side member may be connected to the first sheet support part, and the second side member may be connected to the second sheet support part. In an alternative embodiment, the first side member may be hinged to the first seat support and the second side member may be hinged to the second seat support.

  In other alternative embodiments, the folding direction of the frame and the folding direction of the sheet may be orthogonal, so that when the weight is applied thereto in its unfolded state, the sheet is folded by the folding mechanism. Make sure you stay in the right state.

  A seat for a folding wheelchair is also described, wherein the seat can include a first seat plate and a second seat plate, the first seat plate being a first seat support on the side member side. The second seat plate may be hinged to the second seat support on the side member side, and the seat plate may be on the side edge of the seat opposite the side member side. So that when the wheelchair is in its folded state, the seat protrudes above the seat support and the side edges of the first seat plate and the second seat The side edges of the plates will abut against each other when the wheelchair is in its unfolded state.

  The seat can include a handle. The handle can be folded into a recess in one of the first seat plate or the second seat plate.

  A folding wheelchair has also been described, which can be provided with a carrying handle. The carrying handle may be attached to the seat. The carrying handle can be folded into a recess in the seat.

A backrest column for a wheelchair is also described. The backrest column can be provided with a mounting portion at the first end, and the side surfaces extending in the longitudinal direction of the backrest column are a seat side surface, a rear side surface, and an outer side surface. The back struts, forming the inner side, and
A longitudinal groove in the seat side surface extending in the longitudinal direction of the backrest strut and formed with a longitudinal tongue, so that a longitudinal opening and a longitudinal external cavity are formed, the cavity being longitudinal A longitudinal groove having a width greater than the width of the directional opening;
-The rear side can further comprise at least one longitudinal groove configured to displaceably mount the mounting bracket.

  The backrest strut can include a longitudinal mounting groove and a longitudinal locking groove on a rear side thereof. The backrest strut can be on the rear side and provided with a groove. The backrest strut may be a two-part hinged connection.

  The wheelchair can comprise two backrest columns as described above, the wheelchair can further comprise a backcloth, the backcloth can comprise a locking pin channel on its side edge, and the wheelchair is An elongate locking pin can further be provided so that the back fabric is locked in the groove when the locking pin channel of the back fabric is disposed in the groove and the locking pin is disposed in the locking pin channel. . In an alternative embodiment, the wheelchair can further comprise a back fabric, the back fabric can comprise longitudinal extensions at its side edges, so that the back fabric has an extension of the back fabric. When placed in the groove, it is locked in the groove.

  A tilting device for a wheelchair is also described, and the wheelchair may include a first seat support, a second seat support, a first side member, and a second side member. In some embodiments, each side member may comprise a cavity, the seat support may be hinged to the side member, and the tilting device has a first end and a second end. The spring body may include a spring body, the first end of the spring body may be hinged to the link piece, and the second end of the spring body may be connected to the side member, and in part the link The piece may be connected to the seat support and the spring body may be housed in the cavity of the side member.

  The side member may include a slot for the link piece to protrude beyond the side member. The link piece may be hinged to an articulated suspension that connects the backrest strut to the seat support. The spring body can comprise a gas spring. The gas spring can include a wire-operated locking mechanism. The locking mechanism may be connected to the operating lever through a wire.

  A back angle device for a wheelchair is also described, wherein the wheelchair can include first and second backrest struts and first and second seat supports, in part, each backrest strut being An interior cavity can be included, and at a first end can comprise a mounting for a hinge connection to an articulated suspension that can connect a backrest strut to a seat support, the back angle device comprising: The backrest device may be configured to adjust the angle of the backrest strut relative to the support, and the back angle device may include a spring body having a first end and a second end, the first end being The back end may be attached to the back strut, the second end may be hinged to the articulated suspension, and the spring body may be housed within the interior cavity of the back strut.

  The spring body that can be accommodated in the backrest column can comprise a gas spring. The gas spring can include a wire-operated locking mechanism. The locking mechanism may be connected to the operating lever through a wire.

A tensioning mechanism for manipulating wheelchair wires is also described,
A housing with an opening;
-An L-shaped link piece rotatably supported by the heel;
-A wire block rotatably supported at the first end of the link piece;
The tensioning mechanism may be adapted so that the finger inserted through the opening abuts the second end of the link piece, and the displacement of the finger causes the link piece to pivot about its support, resulting in a wire block Is displaced in the direction toward the opening, and as a result, the wire that extends through the wall of the housing in the wire bushing and is attached to the wire block is displaced with the wire block.

  The tensioning mechanism may be attached to a wheelchair backrest and configured to receive a finger of an operating lever of a removable coupling bar.

  A mounting mechanism for a removable table for a wheelchair is also described, wherein the wheelchair can include an armrest, the removable table can include a table top, and the mounting mechanism is a single locking mechanism. A pin and a locking pin holder, wherein at least one of the locking pin and the locking pin holder may be attached to a side of the table top, and at least one of the locking pin and the locking pin holder May be attached to a wheelchair armrest, and the locking pin holder may comprise at least one groove configured to receive the locking pin.

  The groove may be a positioning groove having a plurality of positioning recesses. The locking pin holder may further include a guide way. The locking pin may be attached to the locking rail and may protrude laterally therefrom, and the locking rail may be attached to the side of the table top. The locking rail may further include at least a guide pin.

  A mounting device for a legrest that is removably attached to a wheelchair is also described, the mounting device can consist of a male part and a female part, the male part can rotate within the female part, The male part may be substantially conical and the female part may be configured to accommodate the male part.

  The legrest can include a male part. In an alternative embodiment, the legrest can include a female portion. The female portion can include a collar, the collar can include a notch, and the male portion includes a locking body having a protruding locking tongue configured to engage the notch. The female collar can include a protruding shoulder and the male can include an edge so that when the male is rotated within the female, the edge abuts the shoulder. .

  A legrest for a wheelchair with a seat is also described, the legrest can be provided with a footrest at its first end, and the legrest is hinged to the arm at its second end Well, the hinge axis can substantially coincide with the rotation axis of the knee joint of a person sitting in a wheelchair, and the legrest can be rotated around the hinge axis, resulting in the longitudinal direction of the legrest The axis may form an angle that is at least 90 ° with respect to the seat plane defined by the wheelchair seat.

  A displaceable seat for a wheelchair is also described, the seat may be disposed between the seat supports of the wheelchair, and the backrest may be attached to the seat support, the seat support being connected to the fixed rail And a rail that is displaceable in the longitudinal direction of the seat support, and the seat may be attached to the displaceable rail of the seat support.

  The fixed rail may include a support pipe and an external groove, and the displaceable rail is displaceable in the guide pipe and the external groove configured to be displaceable in the support pipe. And a slide rail comprising at least one pin configured as described above. The pin can also consist of a dovetail and the groove can consist of a dovetail.

  The displaceable rail can comprise a mounting device for the legrest.

  The mounting device can hold both the end of the slide rail and the end of the guide pipe together.

  The seat may be made of a rigid material and may be hinged to the slide rail.

  The wheelchair may be a folding wheelchair, and the wheelchair seat may be made of a rigid material and may be a two-part hinged connection.

  In the following, examples of preferred embodiments visualized in the attached drawings will be described.

FIG. 6 is a side view of a mounting device for a wheelchair removably attached legrest, with the male portion of the mounting device connected to the legrest. FIG. 4 is a perspective view of two mounting devices in a position where a wheelchair seat portion, a portion of a side frame, and an associated leg rest are swung down. FIG. 3 is a perspective view of the mounting device of FIGS. 1 and 2. FIG. 4 is the same view of FIG. 3 from a different angle. FIG. 3 is a side view of the same as FIG. 2 with backrest and wheelchair operating means. FIG. 6 is a view of the same thing as FIG. 5 in a smaller scale and in a position where the legrest is swung up. FIG. 6 is a perspective view of the leg rest and the male part of the mounting device at a larger scale. FIG. 8 is the same view of FIG. 7 from a different angle. FIG. 6 is a side view of a sitting person at different scales, showing the rotation axis of the knee joint. FIG. 10 is a side view of a person sitting in a wheelchair at the same scale as FIG. 9. It is a perspective view of the folding mechanism for folding wheelchairs in a state where the folding mechanism is unfolded. FIG. 12 is a perspective view of the folding mechanism in a partially folded state at the same scale as FIG. 11. FIG. 12 is a perspective view of the folding mechanism in a fully folded state at the same scale as FIG. 11. FIG. 12 is a perspective view of the folding mechanism and the folding sheet in an unfolded state at the same scale as FIG. 11. It is a figure of the same thing as FIG. 14 in the state by which the folding mechanism and the sheet | seat were folded. It is a side view of the same thing as FIG. FIG. 15 is a view of the folded sheet in the unfolded state and the folded state at the same scale as in FIG. 14. It is a perspective view which shows the state (C) which the folding sheet | seat relevant to a side member was unfolded, the other aspect (B), and the state seen from the back side surface (C) on a slightly smaller scale than FIG. It is the same thing figure as FIG. 18 in the state by which the sheet | seat was folded. It is a perspective view of the folding wheelchair by this invention. It is the same thing as FIG. 20 with the wheelchair completely folded. FIG. 6 is a partially cutaway side view at the same scale as in FIG. 5, showing the tilting device in the side member of the wheelchair. FIG. 22B is a partially cutaway side view at the same scale as in FIG. 5, showing the backrest at a different position from FIG. FIG. 22B is a detailed view of FIGS. 22A and 22B on a larger scale, showing the connection of the tilting device to the side member. FIG. 22 is a perspective view showing the link piece from which the tilting device protrudes and the connection to the sheet support portion at a scale different from those of FIGS. 22A and 22B. FIG. 15 is a perspective view of the same as FIG. 14 with leg rests at different scales. It is a perspective view in the larger scale of the backrest support | pillar seen from the downward direction. FIG. 27 is a cross-sectional view of the backrest strut shown in FIG. 26 at a larger scale. Sectional view (A) at a smaller scale of the backrest column with the backcloth attached, and a sectional view at the same scale as (A) of a backcloth having an alternative design of the side edges ( B, C). It is a perspective view in a different scale of the back cloth which has an expansion body in each side edge part. FIG. 21 is a view of the same portion of the backrest column and the back fabric shown, as shown in FIG. 20, on a larger scale. FIG. 23 is a side view of the wheelchair shown in FIGS. 22A and 22B, showing the position of the backrest post. FIG. 23 is a larger scale perspective view of the same as FIGS. 22A, 22B with an associated removable coupling bar. FIG. 33 is a detail view of FIG. 32 at a larger scale. FIG. 6 is a more detailed view of the locking portion of the operating lever and the removable coupling bar in the unlocked and locked positions at a larger scale. It is a perspective view in the larger scale of a tension | tensile_strength mechanism with which the nail | claw of an operation lever is engaging with the tension | tensile_strength mechanism. FIG. 23 is a side view at a larger scale of the details from FIGS. 22A, 22B, with the removable coupling bar locked to the backrest post and the operating lever engaged with the tensioning mechanism. FIG. 3 is a perspective view of a wheelchair having a removable table at a smaller scale. FIG. 38 is a perspective view of the wheelchair removable table and armrest portion with a locking rail holder on a slightly larger scale than FIG. FIG. 39 is a view of the same as FIG. 38 at slightly larger scale with the armrest removed. A side view of the same as FIG. 39, a slightly larger scale side view (A). And (B) is a side view of a removable table placed in engagement with a locking rail holder at a larger scale.

  In the description of the drawings, some details are omitted. These details are not essential to highlight what is new about the present invention. These details may be important for the production of the device, but their description has been omitted for the sake of simplicity and clarity of the present invention.

  Several or corresponding elements are denoted by the same reference numerals in these figures.

  The designation of position such as “upper”, “lower”, “upper”, “lower”, “right”, “left”, etc. refers to the positions shown in these figures.

  Below, the code | symbol 1 shows the folding mechanism of the folding wheelchair 4 by this invention.

  The folding mechanism 1 shown in FIG. 11 includes an articulated frame 12 including two link mechanisms 122a and 122b and two side members 121a and 121b. In the illustrated embodiment, the articulated frame 12 forms a rectangle.

  The link mechanisms 122 a and 122 b include a first link 1221 and a second link 1222 connected to the hinge element 123. It should be understood that the hinge element 123 may alternatively consist of other elements that can allow the folding movements described further. Each hinge element 123, 123 ′ is hinged to the rigid connection element 15. In the illustrated embodiment, the hinge elements 123, 123 ′ are formed by the fitting of the hinge elements 123, 123 ′, but the hinge elements 123, 123 ′ are known per se between the link 1221 and the link 1222. May be provided by placing certain types of hinges. In an alternative embodiment (not shown), the connecting element 15 may be partially flexible and may include, for example, a wire.

  The first link 1221 and the second link 1222 are hinged to the corresponding side members 121a and 121b on the respective side member sides. As a result, as shown in FIGS. 12 and 13, when the folding mechanism 1 is folded, the links 1221 and 1222 can follow the side members 121a and 121b.

  In order to change the folding mechanism 1 from the unfolded state to the folded state, a force is applied to the folding direction Ff of the folding mechanism 1 through the rigid connecting element 15. The links 1221 and 1222 of the link mechanisms 122a and 122b rotate around the hinges connected to the side members 121a and 121b, and the hinge elements 123 and 123 ′ are displaced in the folding direction Ff. . The side members 121a and 121b are displaced toward each other in a direction perpendicular to the folding direction Ff shown in FIGS.

  FIG. 11 shows the folding mechanism 1 in an unfolded state in which the longitudinal directions Ll1 and Ll2 of the links 1221 and 1222 substantially coincide with each other. In an alternative embodiment (not shown), the links 1221, 1222 may be somewhat angled when the folding mechanism 1 is in an unfolded state where Ll1 and Ll2 do not coincide. The links 1221, 1222 form a first stop surface 101 and a second stop surface 109, respectively, at their respective second ends. When the folding mechanism 1 is moved towards its unfolded state, the links 1221, 1222 can be rotated until the first stop surface 101 hits the second stop surface 109.

  FIG. 12 shows the folding mechanism 1 in a state of being folded. The rigid connecting element 15 is displaced in the folding direction Ff of the folding mechanism 1, and the longitudinal directions Ll1 and Ll2 of the links 1221 and 1222 no longer coincide. The side members 121a and 121b are displaced toward each other with respect to those shown in FIG.

  FIG. 13 shows the folding mechanism 1 in a fully folded state.

  FIG. 14 shows the folding mechanism 1 in an unfolded state. The folding mechanism 1 further includes a folding sheet 14 that is mounted between the side member 121a and the side member 121b. In some figures, a sheet 14 comprising a first sheet plate 141a and a second sheet plate 141b is shown. The sheet plates 141a and 141b are hinged to each other (see FIGS. 15 and 17B). On the side member side, the seat 14 is also hinged to the first seat support 13a and the second seat support 13b. In these figures, the sheet 14 is shown as a two-part (two-part configuration) sheet 14, and the sheet plates 141a and 141b are along the side edges 143a and 143b of the sheet plates 141a and 141b, respectively. Both are hingedly connected, so that the sheet 14 can be folded. Thereby, when the folding mechanism 1 is brought into the folded state, the seat 14 is folded, and the wheelchair 4 is brought into the folded state. 15, 19, and 21, and its folding movement in the direction Ff toward the folding mechanism 1, the sheet 14 is completely unfolded, and the planes of the sheet plates 141 a, 141 b coincide, The sheet 14 is stopped when the side edge portions 143a and 143b of the sheet 14 contact each other (see A in FIG. 17). The sheet 14 is advantageously made of a rigid material, such as wood, aluminum, or a rigid polymer material. When weight is imposed on the folding sheet 14, the folding mechanism 1 will be forced to assume a fully expanded state where the longitudinal directions Ll1, Ll2 of the links 1221, 1222 will coincide. The folding direction Fs of the sheet 14 and the folding direction Ff of the folding mechanism 1 are orthogonal to each other. Thereby, it is achieved that the frame 12 is locked in its unfolded state and the mechanical rigidity is increased. In these figures, the sheet 14 is shown as a two-part sheet 14. In an alternative embodiment (not shown), the seat 14 may consist of one rigid seat plate that is hinged to one seat support 13a, 13b at one side edge. In other alternative embodiments, the sheet 14 may comprise a fabric.

  FIG. 15 shows the folding mechanism 1 in a fully folded state. The seat 14 is shown with a foldable handle 18 and a recess 19 for the handle 18 (see FIG. 18A). In some figures, the handle 18 is shown folded into a recess 19 in the central portion of the seat 14. The handle 18 and the recess 19 may be disposed at other positions of the seat 14 as long as the handle 18 facilitates folding of the wheelchair 4. By providing the handle 18 in the recess 19 of the seat 14, it is achieved that the seat 14 provides a smooth surface. A seat cushion (not shown) may be disposed on the seat 14. FIG. 21 shows the wheelchair 4 in its folded state. Before the wheelchair 4 is folded, the coupling bar 6 described later must be removed.

  The folding mechanism 1 further includes a pin 103 protruding from the hinge element 123 in the folding direction Ff (see FIGS. 12 and 13). The handle 17 is elastically connected to the pin 103 by a pin 103 inserted into the handle 17, and the handle 17 accommodates the handle 17 and an internal spring (not shown) attached to the pin 103. This spring will displace the handle 17 towards the hinge element 123. When the folding mechanism 1 is in the unfolded state, the handle 17 applies elastic pressure against the side surfaces 1221 ′, 1222 ′ of the links 1221, 1222 facing the handle 17. Thereby, it is achieved that the handle 17 presses the folding mechanism 1, and as a result, the folding mechanism 1 remains in the unfolded state. This is useful when the seat 14 of the wheelchair 4 is not loaded. The side surface of the handle 17 facing the side surfaces 1221 ', 1222' may be formed as a shape adapted to the shape of the side surfaces 1221 ', 1222'. When the folding mechanism 1 is in the folded state, the pin 103 protrudes from the stop surfaces 101 and 109 of the links 1221 and 1222 so far that the handle 17 does not touch the links 1221 and 1222. In this position, the handle 17 does not apply pressure to the links 1221 and 1222.

  The connecting element 15 is hinged to the hinge elements 123, 123 '. In one embodiment, the connecting element 15 can include a pin 103 at one end.

  The handle 17 facilitates the operation of the folding mechanism 1 in that better gripping can be achieved with respect to moving the rigid connecting element 15 in the folding direction Ff. When the wheelchair 4 is to be folded, the handle 17 is pulled in the folding direction Ff of the folding mechanism 1 and the handle 18 is pulled simultaneously. As a result, the seat 14 is folded in the folding direction Fs. Next, the side members 121a and 121b and the sheet support portions 13a and 13b are moved toward each other, and the sheet 14 is moved to the sheet support portions 13a and 13a, as shown in FIGS. The position which protrudes upward with respect to 13b will be taken.

  When the wheelchair 4 is folded, the link mechanism 122b protrudes beyond the side members 121a and 121b (see FIG. 16). The handle 18 is shown in an upward projecting position that facilitates its operation. The handle 18 reveals in which direction the seat 14 is pulled in order to fold the wheelchair 4. The handle 18 also reveals that the user can lift the wheelchair 4 with the handle 18.

  20 and 21 show the wheelchair 4 in the unfolded state and the folded state, respectively, and the wheelchair 4 comprises the folding mechanism 1 described and shown in FIGS.

  In an alternative embodiment, the present invention includes a seat 14 that is displaceable relative to the seat supports 13a, 13b. Each seat support portion 13a, 13b includes a support portion pipe 135 and a slide rail 134 (see B in FIG. 18). The support pipe 135 accommodates a guide pipe 132 that can be displaced in the axial direction. On its inner side surface, the support pipe 135 further includes a dovetail 131 '(see FIG. 18C). The slide rail 134 includes a dovetail 131 that is complementary to the dovetail 131 '. The female portion 72 of the mounting device 7 (see FIG. 1) holds both the end of the slide rail 134 and the end of the guide pipe 132 (see B in FIG. 18). When the slide rail 134 and the guide pipe 132 are axially displaceable with respect to the support pipe 135, and the seat 14 is attached to the slide rail 134, the seat 14 is displaced in the direction of the broken line arrow. (See B in FIG. 18). The seat 14 can be locked at a desired position by tightening a screw 133 that protrudes into the support pipe 135 and contacts the guide pipe 132.

  The wheelchair 4 can include a tilting device 3. The tilting device 3 includes a spring body 33 housed in the cavity of the side member 121b (see FIGS. 22A and 24). In these drawings, the spring body 33 is shown as a gas spring 33. The spring body 33 is attached to the end portion 351a of the link piece 35 at the first end portion 331a. The spring body 33 is attached to the side member 121b at the second end 331b. The link piece 35 is attached to the sheet support portion 13b at the central portion 351b. The link piece 35 protrudes beyond the slot 37 in the side member 121b (see FIGS. 24 and 25). The seat support portion 13b is rotatably attached to the side member 121b by the seat hinge 32. Thereby, the link piece 35 converts the linear motion of the spring body 33 into a tilting motion in the seat support portion 13b. Correspondingly, the spring body 33 is disposed in the cavity of the side member 121a, and the link piece 35 is hinged to the seat support portion 13a. The seat support portion 13a is rotatably attached to the side member 121a by the seat hinge 32.

  The gas spring 33 further comprises a wire-operated locking mechanism 38 of a type known per se. The wire-operating locking mechanism 38 is connected to the tension mechanism 65 via a wire (not shown) (see FIG. 35). As a result, the piston (not shown) of the gas spring 33 is locked at a desired position, and as a result, the seat support portions 13a and 13b are adjusted to a desired angle with respect to the side members 121a and 121b. Will be kept.

  When the seat support portions 13a and 13b are tilted rearward, the gas spring 33 is displaced in the direction Rf, the link piece 35 is displaced in the direction Rl, and the seat support portions 13a and 13b are moved around the rotation axis Ha of the seat hinge 32. It is rotated.

  In these drawings, the spring body 33 is shown as a gas spring 33. However, it is understood that other spring bodies 33 may be used, such as ordinary springs or hydraulic springs, as is known in the art. Those skilled in the art will also be aware of other devices that can be used to accomplish the same purpose, such as linear actuators.

  FIG. 25 shows the folding wheelchair 4, and shows the link piece 35, the side member 121 b, the seat support portion 13 b, and the seat hinge 32. The gas spring 33 is accommodated in the cavity of the side member 121b and is not shown in the figure.

  As shown in FIG. 26, the backrest column 5 includes an attachment portion 51 at one end for pivotally attaching the backrest column 5 to the seat support portions 13a and 13b of the wheelchair 4. In the figure, the attachment 51 is shown as a hinge, which constitutes an element in the articulated suspension 50, this hinge being against the seat support 13 a, b of the wheelchair 4 for the backrest column 5. Allows rotational movement so that it can be moved to an angle (see FIGS. 22A and 22B).

  The backrest column 5 has a seat side surface 53a, an opposite rear side surface 53b, an outer side surface 53c, and an inner side surface 53d (see FIG. 27). The seat side surface 53a faces the user 8P in the wheelchair 4 (see FIG. 10). On the rear side surface 53b, the backrest column 5 includes a longitudinal mounting groove 541 and a longitudinal locking groove 542 (see FIG. 26). On the seat side surface 53 a, the backrest column 5 includes a longitudinal groove 52. The mounting groove 541 is shown as a dovetail groove (see FIG. 27). The locking groove 542 is shown as a T-shaped groove. The mounting groove 541 is configured to receive a mounting bracket 57 for a mounting means 57, such as a hand handle 68 and a hinge 56 (see FIG. 26). The locking groove 542 is configured to simultaneously receive locking means, such as a screw and a T-nut. The groove 52 is formed by a longitudinal tongue 521 so that a longitudinal opening 522 and a longitudinal cavity 523 are formed (see FIG. 27). The cavity 523 of the groove 52 has a diameter 523 a that is greater than the width 522 a of the longitudinal opening 522.

  The backrest column 5 is shown as having a two-part configuration (see FIG. 26). The upper column part 5 ′ of the backrest column 5 is connected to the lower column unit 5 ″ of the backrest column 5 by a column hinge 56. The purpose of the column hinge 56 is between the two column units 5 ′ and 5 ″ of the backrest column 5. Providing the desired angle, so that the angle can be adapted to the application situation of the wheelchair 4, for example by allowing the backrest column 5 to be folded when the wheelchair 4 is in its folded state. (See FIG. 21). The upper column portion 5 'and the lower column portion 5 "of the backrest column include longitudinal grooves 52', 52", longitudinal mounting grooves 541 ', 541 ", and longitudinal locking grooves 542', 542". The longitudinal grooves 52 ', 52 "can form a continuous channel when the upper strut 5' and the lower strut 5" are in an unfolded state as shown in FIG.

  The back cloth 55 is fixed in the groove 52 (see FIG. 28A and FIG. 29). The cavity 523 of the longitudinal groove 52 has a diameter 523 a that is greater than the width 522 a of the longitudinal opening, so that the locking pin 553, or any other elongated locking body 553 disposed within the cavity 523, is the length of the longitudinal groove 52. It cannot be removed by any means other than being pulled in the direction. The locking body 553 may constitute a part of the back cloth 55, and the back cloth 55 may be detachably attached between the two backrest columns 5 in the groove 52. The back cloth 55 passes through the seat side surface 53 a of the backrest column 5.

  Thereby, the back cloth 55 is held relatively tightly between the backrest columns 5, and as a result, it is achieved that the user 8 </ b> P does not come into contact with the backrest column 5. At the same time, the locking groove 542 is secured to the rear side 53b of the backrest column 5 for mounting the desired device in the mounting groove 541 and so that the device is securely locked at the desired height by a locking mechanism (not shown). Free access to. The device can also be displaced within the mounting groove 541 without being blocked by the back cloth 55.

  In one embodiment, as shown in FIGS. 28A-B, the back cloth 55 can surround the locking pin 553 so that the back cloth 55 is mounted and positioned within the cavity 523. . An alternative embodiment is shown in FIG. The locking body 553 is in the form of a longitudinal extension 555 that can be disposed within the cavity 523 of the longitudinal groove 52. In an alternative embodiment, the back fabric 55 can consist of a continuous body. For example, the back fabric 55 is a molded polymeric material in which the side edges of the back fabric 55 include longitudinal extensions 555 that will be locked into the cavity 523 of the longitudinal groove 52, as shown in FIG. Can consist of In an alternative embodiment, as shown in FIG. 30, the back cloth 55 may consist of a two-part back cloth 55, the upper portion 55 'and the lower portion 55 "of which are respectively the upper strut portions 5'. And attached to the lower strut 5 ″.

  The backrest column 5 has therein a spring body 581 of a type known per se, shown in some figures as a gas spring 581 (see FIG. 26). The gas spring 581 is hinged to the link arcuate piece 349 at its lower end (see FIG. 22B). At the opposite end, the link arcuate piece 349 is hinged to the angle plate 341. The angle plate 341 is further attached to the link piece 35. The mounting portion 51 of the backrest column is hinged to the link piece 35. As the piston rod 582 of the gas spring 581 is displaced along the longitudinal axis of the backrest column 5, the link arcuate piece 349 and the backrest column mounting portion 51 are rotated about their respective hinge shafts 3H, 5H. The Thereby, the angle 3V between the backrest column 5 and the seat support portion 13b is changed.

  The wheelchair 4 includes a detachable coupling bar 6 as shown in FIGS. 32 and 33. These figures are shown with the coupling bar 6 removed. The coupling bar 6 is attached to the backrest column 5 of the wheelchair 4 by a lock 67 disposed on the coupling bar 6, and connects the backrest columns 5 to each other. The coupling bar 6 also includes operation levers 61 and 61 'for operating the tilting device 3 and the seat angle device 58 of the wheelchair 4, respectively. The operation levers 61 and 61 ′ include a finger 63.

  When the coupling bar 6 is in its application position, the lock 67 is placed in the mounting groove 541 of the backrest column 5 (see FIG. 33). The lock 67 includes a locking lever 671, a locking pin 673, and a locking block 675 (see FIGS. 34A and 34B). The locking lever 671 is pivotally attached to the locking pin 673. As a result, when the locking lever 671 is folded, the end of the locking pin 673 is displaced from the locking block 675. The coupling bar 6 is locked to the backrest column 5 of the wheelchair 4 by moving the locking block 675 into the longitudinal mounting groove 541 ′ of the backrest column 5. The locking block 675 has a dovetailed cross section and is adapted to the complementary dovetailed cross section of the mounting groove 541. After the locking block 675 is disposed at the correct height in the mounting groove 541 ', the locking lever 671 is folded, and the locking pin 673 is pressed against the bottom of the mounting groove 541'. The locking pin 673 applies pressure to bring the side edge of the locking block 675 into contact with the side edge of the mounting groove 541 ′, thereby achieving that the locking block 675 is fixedly held (FIG. 33 and FIGS. 34A to 34B).

  As shown in FIG. 35, the fingers 63 of the operation levers 61 and 61 ′ are disposed in the tension mechanism 65 through an opening in the housing of the tension mechanism 65. When the operation levers 61 and 61 ′ are moved from the inactive state position to the active state position in the direction of the broken line arrow, the operation levers 61 and 61 ′ are rotated around the rotation axis 6h, and the finger 63 is L-shaped. Pressure is applied to the angle piece 651. The angle piece 651 is rotatably attached to the housing of the tension mechanism 65. At the end, the angle piece 651 is provided with a wire block 653 that is rotatably mounted, and the wire block 653 is fixed to the wire block 653 when the angle piece 651 is rotated around its rotation axis by the finger 63. A tensile force is applied to the one or more wires 591 formed. These wires are connected to a wire block 653 through a wire bushing 655. The operating levers 61 and 61 'are returned to their inactive positions by a spring comprising a spring body 33 (not shown).

  A wire from the wire block 653 operated by the operation lever 61 is connected to a gas spring in the backrest column 5. The wire from the wire block 653 operated by the operation lever 61 'is connected to the gas spring 33 in the side members 121a and 121b. When the operating levers 61 and 61 'are both in their inactive positions, the backrest column 5 is fixedly connected to the seat supports 13a and 13b. When the operating lever 61 is activated, the gas spring in the backrest column 5 is released as is known in the art, adjusting the angle 3V between the backrest column 5 and the seat supports 13a, 13b. (See FIG. 22B). When the operating lever 61 is released, the operating lever 61 returns to its inactive position and the gas springs are locked in their new position. When the operation lever 61 'is activated, the gas springs in the side members 121a and 121b are released, and the back of the wheelchair 4 is moved when the backrest column 5 is fixedly connected to the seat support portions 13a and 13b. By moving, the angle between the side members 121a and 121b and the sheet support portions 13a and 13b can be adjusted. When the operating lever 61 'is released, the operating lever 61' returns to its inactive position and the gas spring is locked in their new position.

  The operating levers 61, 61 'may be marked and labeled so that their function is clear. The operation levers 61 and 61 ′ may be operated from the front of the wheelchair 4, from the rear, and from the side. Thereby, it is achieved that the operation levers 61 and 61 'are operated safely even when the nurse makes a line of sight with the person 8P in the wheelchair 4. In addition, the operation levers 61 and 61 ′ are disposed in the detachable coupling bar 6, which increases the safety of using the wheelchair 4. The seat angle and back angle of the wheelchair 4 cannot be adjusted without the connecting bar 6 being correctly equipped.

  The wheelchair 4 can include a removable table 9 as shown in FIG. The removable table 9 is releasably attached to the armrest 97 of the wheelchair 4. The table 9 can be displaced in the direction of the arrow, so that in its application position, the table 9 can be adjusted for a wheelchair user 8P (not shown in FIG. 37).

  The removable table includes a table top 91 and two locking rails 93. As shown in FIGS. 38 and 39, the locking rail 93 is attached to the side edge of the table top 91, and the mounting screw 911 of the locking rail 93 is movable in a notch 913 in the table top 91. Thus, it is shown as being laterally adjustable. Thereby, it is achieved that the distance between the locking rails 93 can be adjusted and adapted to the distance between the armrests 97. The armrest 97 includes an armrest rod 99. As shown in FIG. 37, the armrest rod 99 can be attached to the seat support portions 13 a and 13 b of the wheelchair 4. The armrest 97 further includes a locking rail holder 95.

  As shown in FIGS. 38 to 40, the locking rail holder 95 includes a positioning groove 951 and a guide way 953. The positioning groove 951 includes a retracting portion 9510 that tapers toward a positioning portion 9519 extending in the longitudinal direction of the locking rail holder 95. The positioning portion 9519 includes a plurality of positioning recesses 9515 in the lower bottom portion of the positioning groove 951. The guideway 953 includes a retracting portion 9530 that tapers toward a guide portion 9539 extending in the longitudinal direction of the locking rail holder 95.

  The locking rail 93 includes a first guide pin 931 and a second guide pin 931 'at the bottom (see FIG. 39). Guide pins 931 and 931 ′ protrude laterally from the locking rail 93 and face inward under the table top 91. In one embodiment of the figure, the locking rail 93 can include a plurality of holes 9311 in the lower portion thereof. Thereby, it is achieved that the guide pins 931 and 931 ′ can be fixed at selectable positions along the lower part of the locking rail 93.

  FIG. 39 shows only the removable table 9 and the locking rail holder 95. The arrows in FIGS. 39 and 40 indicate how the guide pins 931 of the locking rail 93 are arranged relative to the locking rail holder 95 when the table 9 is mounted on the armrest 97. The first guide pin 931 is arranged to be inserted into the retracting portion 9510 and the second guide pin 931 ′ is arranged to be inserted into the retracting portion 9530. Next, the guide pins 931 and 931 'are further moved into the positioning groove 951 and the guide way 953, respectively.

  FIG. 40B shows a side view of the removable table 9 wherein the first guide pin 931 of the locking rail 93 is disposed in one of the positioning recesses 9515 in the positioning groove 951 and the second guide pin 931 ′ is disposed in the guideway 953. The positioning recess 9515 prevents the guide pin 931 from moving in the direction of the dashed arrow. The second guide pin 931 ′ in the guide way 953 prevents the table 9 from moving in the direction of the solid line arrow. Thereby, it is achieved that the removable table 9 can be placed in a releasably fixed and stable position at a desired distance to the back of the wheelchair 4.

  The wheelchair 4 includes a mounting device 7 for the removable leg rest 8 (see FIGS. 1 to 10), the male portion 71 of the mounting device 7 is disposed on the arm 73, and the arm 73 is connected to the leg rest 8. Is done. In FIG. 1, the mounting device 7 is shown in its disengaged position before the male part 71 of the mounting device 7 is engaged with the female part 72. The male part 71 has a substantially conical shape. The conical shape facilitates insertion of the male part 71 into the female part 72 in that it does not require the central axis of the male part 71 to be accurately aligned with the central axis of the female part 72. In these figures, the male part 71 is shown as a cone with protrusions, but it should be understood that any conical male part 71 fitted to the female part 72 is encompassed by the present invention. The mounting device 7 further includes a locking body 711 adjacent to the male part 71. The locking body 711 includes an edge 712 and a protruding locking tongue (not shown). The female part 72 includes a collar 721 and a shoulder part 7212 protruding from the collar 721. The collar 721 includes a notch 7211.

  The male part 71 is inserted into the female part 72. The locking body 711 hits the collar 721. The female part 72 can be rotated in the female part 72 until the locking tongue of the locking body 711 engages the notch 7211. When the locking tongue is engaged with the notch 7211, the male part 71 cannot be rotated within the female part 72 or lifted from the female part 72. The engagement of the locking tongue with the notch 7211 ends by pulling on the finger grip 73. The male part 71 can be rotated within the female part 72 until the male edge 712 hits the shoulder 7212 of the female part 72 (see FIG. 3 where the edge 712 is separated from the shoulder 7212 by a distance). . In FIG. 4, the male portion 71 is shown from a different side when the edge portion 712 hits the shoulder portion 7212. In this position, the legrest 8 is rotated toward the wheelchair 4. This facilitates access to the wheelchair 4 for the person 8P without having to lift the legrest 8.

  2, 5, and 6 show the legrest 8 attached to the seat support portions 13 a and 13 b of the wheelchair 4 via the arm 73 and the mounting device 7. The first end 81 of the legrest 8 includes a footrest 811. The second end 82 of the legrest 8 includes a hinge case 89 that surrounds a hinge (not shown). The legrest 8 is hinged to the arm 73 so that the legrest 8 can rotate about the axis 84 (see in particular FIG. 8). The leg rest 8 includes another leg rest 88. In FIG. 5, two dashed lines 85, 86 are shown, which are parallel to the seat plane of the wheelchair 4 and the longitudinal axis of the legrest 8, respectively. Arrow 87 indicates the angle between the wheelchair seat plane and the longitudinal axis of legrest 8. In FIG. 5, the angle between the seat plane of the wheelchair 4 and the longitudinal axis of the leg rest 8 is shown as 90 °. In FIG. 6, this angle is shown as an angle less than 90 °. In FIG. 7 and FIG. 8, other possible angles are shown. Also, this angle may be greater than 90 °, i.e., the footrest 811 is moved in under the seat supports 13a, 13b (not shown).

  The angle of the leg rest 8 is adjusted by pushing a spring-loaded locking pin 891 (see FIGS. 6 to 8) in the hinge case 89. The locking pin 891 locks the hinge in the hinge case 89 at a desired position. Such mechanisms are known in the art and are not described in further detail. The legrest 88 holds the leg of the user 8P in place when the legrest 8 is in the raised position, as shown in FIG.

  FIG. 9 shows a side view of the person 8P in the sitting position, and the rotation axis 8P1 of the person's knee joint is marked.

  FIG. 10 shows a part of the wheelchair 4 together with the person 8P in the sitting position. In FIG. 10, the wheelchair 4 is shown with the legrest 8 in the first position where the legrest is folded, and with the legrest 8 in the second position where the legrest 8 is swung up. Has been. The second position of the legrest 8 is indicated by a broken line. The movement of the legrest 8 about the hinge axis 84 is indicated by a dashed arrow. When the user 8P is in the seat 14 of the wheelchair 4, the legrest 8 is normally in its first position. The footrest 811 is moved in the longitudinal direction of the legrest 8 until the footrest 811 hits the sole of the user 8P. The distance between the footrest 811 and the shaft 84 is marked as D1 in the first position. The axis 84 of the leg rest 8 coincides with the axis 88 of the knee joint of the user 8P (see FIG. 9). Thereby, it is achieved that the distance D1 is the same as the distance between the knee joint axis 88 and the sole of the user 8P. The distance D1 is constant at the first and second positions of the legrest 8. Thereby, it is achieved that the sole of the foot of the user 8P is in contact with the footrest 811 at all angles at which the legrest 8 is moved. If the knee joint of the user 8P is below the hinge shaft 84 of the legrest 8 at the first position of the legrest 8, the sole of the user 8P is in contact with the footrest 811 at the second position of the legrest. Would not have. Correspondingly, if the user's 8P knee joint is above the axis 84 of the legrest 8 at the first position of the legrest 8, the footrest 811 will be at the foot of the user 8P at the second position of the legrest 8. Would have put pressure against the back of the.

<Appendix>
[1]
A removable coupling bar (6) for connecting the two backrest struts (5) for a wheelchair (4) comprising two backrest struts (5), the seat angle of the wheelchair (4) and / or At least one operating lever (61) for enabling adjustment of the back angle, the seat angle and / or the back angle without the coupling bar (6) being correctly mounted on the wheelchair (4) Removable coupling bar characterized in that it cannot be adjusted.
[2]
The removable coupling bar (6) according to the above [1], wherein the at least one operation lever (61) is configured to operate the wheelchair tilting device (3), and the tilting device (3 ) Is a detachable coupling bar for controlling the seat angle.
[3]
The removable coupling bar (6) according to the above [1], wherein the at least one operation lever (61) is configured to operate the back angle device (500) of the wheelchair, and the back angle device (500) is a removable coupling bar characterized in that it is for controlling the back angle.
[4]
The removable coupling bar (6) according to [1] above, wherein the coupling bar (6) is configured to be disposed at each end in a mounting groove (541 ′) in the backrest column (5). Removable coupling bar characterized in that it includes two locks (67).
[5]
The removable coupling bar (6) according to the above [1], wherein the operation lever (61) includes a finger (63).
[6]
A wheelchair (4) comprising the detachable coupling bar (6) according to the above [1].
[7]
A tilting device (3) for a wheelchair (4), wherein the wheelchair (4) includes a first seat support (13a), a second seat support (13b), and first and second Side members (121a, 121b), each of the side members (121a, 121b) is partially provided with a cavity, and the seat support portions (13a, 13b) are seat hinges (32) and the side members. The tilting device (3) includes a spring body (33) having a first end (331a) and a second end (331b), wherein the spring body (33a) is pivotally attached to (121a, 121b). The first end (331a) of (33) is hinged to the link piece (35), and the second end (331b) of the spring body (33) is connected to the side member (121a, 121b) and the link piece (35 In the tilting device, the spring is attached in part to the seat support (13a, 13b) to convert linear motion of the spring body (33) into tilting motion in the seat support (13a, 13b) A tilting device characterized in that a body (33) is housed in the cavity of the side members (121a, 121b).
[8]
The tilting device (3) for the wheelchair (4) according to the above [7], wherein the side member (121a, 121b) has the link piece (35) that is the side member (121a, 121b). A tilting device, characterized in that it comprises a slot (37) for protruding beyond.
[9]
The tilting device (3) for the wheelchair (4) according to [7] above, wherein the link piece (35) is an articulated type that connects a backrest column (5) to the seat support (13a, 13b). A tilting device characterized in that it is hinged to the suspension (50).
[10]
The tilting device (3) for a wheelchair (4) according to the above [7], wherein the spring body (33) comprises a gas spring (33).
[11]
The tilting device (3) for the wheelchair (4) according to the above [10], wherein the gas spring (33) includes a wire-operated locking mechanism (38).
[12]
The tilting device (3) for a wheelchair (4) according to [11] above, wherein the locking mechanism (38) is connected to an operation lever (39) through a wire (38a). device.
[13]
A wheelchair (4) comprising the tilting device (3) according to the above [7].

Claims (6)

  A removable coupling bar (6) for connecting the two backrest struts (5) for a wheelchair (4) comprising two backrest struts (5), the seat angle of the wheelchair (4) and / or At least one operating lever (61) for enabling adjustment of the back angle, the seat angle and / or the back angle without the coupling bar (6) being correctly mounted on the wheelchair (4) Removable coupling bar characterized in that it cannot be adjusted.   Removable coupling bar (6) according to claim 1, wherein the at least one operating lever (61) is configured for operation of the wheelchair tilting device (3) and the tilting device (3). Is a detachable coupling bar for controlling the seat angle.   Removable coupling bar (6) according to claim 1, wherein the at least one operating lever (61) is configured for operation of the wheelchair back angle device (500) and the back angle device ( 500) is a removable coupling bar characterized in that it is for controlling the back angle.   Removable coupling bar (6) according to claim 1, one at each end being arranged in a mounting groove (541 ') in the backrest post (5). Removable coupling bar characterized in that it includes a lock (67).   A removable coupling bar (6) according to claim 1, wherein the operating lever (61) comprises a finger (63). Wheelchair (4), characterized in that it comprises a detachable coupling bar (6) according to claim 1 .