FI90625C - Wheelchair - Google Patents

Description

! 90625

Pyoråtuoli

The invention relates to a wheelchair comprising a frame structure with side structures, backrests and an is-5 support part, a plurality of wheels for moving the hydrostat, and handles rotatably mounted to the rear of the frame structure, which are arranged to be folded down. raised and which, when raised, in the operating position-10 are directed backwards, the handling arms comprising the roller members attached to the free ends of the processing arms.

The wheelchair is perhaps the most important tool developed as a tool for a person with reduced mobility. With the help of a wheelchair, a person with a physical disability is able to move from one place in the country to another. However, a person using a wheelchair sometimes finds himself in situations where the wheelchair makes it difficult to move due to various obstacles. Obstacles such as thresholds, stairways, vehicle doorways, terrain obstacles such as rocks and many other types of obstacles can be present.

Various accessories have been developed for hydrogen chairs to improve the use of the wheelchair. As an accessory, the handling arms, which are accelerated to the rear of the wheelchair, are known.

30 In the currently known hydrogen chairs, the handling arms articulated to the wheelchair are quite simple in structure. The known handling arms only comprise the arm part, which can be turned up when an outside person comes to assist the person in the wheelchair. In known wheelchairs, the handling arms 2 90625 can only be used in their position of use, i.e. in the position in which the long arm parts of the handling arms point backwards. The handling arms have not previously been locked in their basic position, but in their basic position they have shown a downward position. The structure of Eras described above is disclosed in SE-447698. In addition, a travel chair is known from patent publication FI-781632, which comprises backward straight arms on which the chair rests on a base. In the latter patent publication 10, these arms are not used at all for handling the chair.

In addition, patent publication SE-8803785-8 discloses an arm structure which is used to assist in ascending stairs.

The wheelchair user also often has to walk through 15 narrow door openings or similar places, from which at least one other wheel has to be removed in order to escape from the wheelchair in order for the wheelchair to taper sufficiently. After removing the wheelchair's wheel, an auxiliary wheel or auxiliary wheel on which the wheelchair rests on the ground or floor is mounted on the rear of the wheelchair or exposed from the structure 20 of the rear of the wheelchair.

In the prior art solutions, the aforementioned structures are mainly implemented as several separate structures, and their structure and placement in the pydrS-25 chair has been such that the device structure performing a specific function, for example acting as an auxiliary bridge, is only suitable for this purpose. In known solutions there are separate rigidly attached auxiliary rods and separate support arms. The travel chair already disclosed in the aforementioned patent publication FI-781632 comprises an upper arm structure and a lower footrest. The upper arm structure with the rollers is used in the rearward-facing position, i.e. in its operating position, to support the travel chair against the five lowering ramps. The stem structure turns strongly to 35 pages, in which case it is clear that the the structure is not suitable for replacing the actual wheel of a 3 90625 wheelchair, as the in the structure, the width of the wheelchair increases. A separate footrest at the bottom is used to support the travel chair in its base. The structure in question is complex and consists of several separate parts, which are both expensive and inadequately functional. The structure described above can also not replace the actual wheel of the wheelchair.

It is an object of the present invention to provide a new type of wheelchair which avoids the problems associated with the known solutions. This object is achieved by a wheelchair according to the invention, characterized in that the wheelchair comprises locking means for locking the handles rotatably attached and provided with roller members in a substantially vertical position, i.e. one or more rotatably lowered, the roller member of the treatment arm is adapted to form a replacement pyrethane on the actual wheel of the hydrogen chair; is adapted to be rotatable at a distance determined by the shape of the mounting arms about the axes formed by the treatment arms.

The solution according to the invention is based on the integration of the pivotable auxiliary wheels and their fastening arms with rotatably fixed handling arms which can be locked in their lower position.

The wheelchair according to the invention achieves several advantages, since the structure of the pivotable handling arms attached to the rear part of the frame structure of the wheelchair is very versatile.

4,90625

Auxiliary wheels are integrated in the same handling arms as a lisph of the traditional handling arm function, and their attachment is designed in such a way that it allows the wheel to be turned and the height changed. The solution 5 according to the invention forms a compact and versatile, sturdy and durable structure.

The invention will now be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a wheelchair schematically in the transverse direction of the wheel-10 chair, Figure 2 shows the wheelchair of Figure 1 in a rearward view Fig. 4a shows a roller member and its mounting arm, Fig. 4b shows a plane-spread part of the roller member mounting arm, Fig. 4c shows a cross-section of the handling arm with the roller member in the upper position - in position.

Referring to Figures 1, 2, 3 and 5, in particular Figures 1 and 2, the wheelchair comprises a frame structure comprising opposite side structures 1 and 2 connected by X-30 joints 3a, 3b. On the basis of the X-joint, the chair can be stacked in the transport position, i.e. the opposite side structures 1 and 2 of the frame structure can be approached against each other. The first side structure 1 comprises an upper body part 1a and a lower body part lb. Respectively, the second side structure 2 comprises 35 an upper body part 2a and a lower body part 2b. The body parts 5 90625 are connected to the connecting pieces 4a and 4b and in addition to the backrests 5, which fit the first and second backrest parts 5a and 5b. My6s backrests are part of the frame structure. In addition, the wheelchair comprises a seat part 6 and several wheels for moving the wheelchair 5, i.e. the actual wheels 7a and 7b, which are larger wheels and additionally smaller front wheels 8a and 8b. The kS handling arms 9 and 10 are rotatably attached to the rear of the wheelchair. In Fig. 1, the first handling arm 9 is shown in its substantially vertical basic position 10, i.e. in its lower position, protruded from the front by reference numeral 9. In the basic position, the handling arm 9 indicates a downward pressure. Reference numeral 9 'denotes a treatment arm in its operating position. In the extended operating position, the first handling arm 9 'points 15 backwards. Correspondingly, in Fig. 2, the second handling arm 10 is shown in its basic position, i.e. in its lower position, out of view with reference numeral 10. In the basic position, the handling arm 10 indicates a depression. Reference numeral 10 'denotes the handling arm in its position of use with the covers shown. In its extended operating position, the handling arm 10 'points backwards. When extended to the position of use, the handling arms 9'and 10 'form gripping arms for the assisting person, from which the wheelchair can be lifted, guided or otherwise handled. The first handling arm 9 is articulated or pivotally attached to the rear of the wheelchair at the hinge point 12. Correspondingly, the second handling arm 10 is articulated or pivotally attached to the rear of the wheelchair at the hinge point 13. The first handling arm pits the arm part 9a, which is an elongate arm 30. Correspondingly, the second handling arm 10 processes the arm part 10a, which is also an elongate arm. In the raised operating position of the handle arms, the arm parts are indicated by reference numerals 9a 'and 10a'.

In the basic position 35, the handling arms 9 and 10 handle the stops 14, β 90625 15 projecting backwards from the arm parts 9a and 10a, which in the locked basic position, i.e. in the lower position, form the handle parts 14 and 15 for handling the wheelchair. In the raised operating position of the handling arms, the handle parts are indicated by reference numerals 14 'and 5 15'. In the raised operating position of the treatment arms 9 ', 10', the handle parts 14 'and 15' are adapted to rest on the frame structure of the hydrostool or on a structural part connected to the frame structure. The support of the handle parts on the frame structure can thus be direct or optional. The handle parts 14 '10 and 15' are adapted to rest on the backrest 5 of the frame structure. The first handle part 14 'rests on the backrest part 5a and the second handle part 15' rests on the backrest part 5b. The support of the handle parts 14 ', 15' on the backrest 5a, 5b improves and strengthens the support of the handling arms and enables the reliable handling of the wheelchair with the handling arms. The handle parts 14, 15 are attached to the arm parts 9, 10 so that the handle parts 14 ', 15' rest on the frame, preferably on the backrest backrests 5a, 5b in the vicinity of the joint points 12, 13 on the upper side of the joint points 12, 13 and so that the handle parts are at least approximately -main parallel to the vertical backrest portions 5a and 5b. Preferably, the wheelchair comprises support means 16, 17 fixed to the frame structure, preferably to the backrest 5a, 5b, the shape of which at least partially corresponds to the shape of the surface of the handles 14 ', 15'. The foregoing means in practice that the round handle part 14 'and 15' is counterbalanced by a support means 16, 17 in the form of a round support surface attached to the back support part 5a, 5b. The shape of the support means 17 is most clearly shown in Fig. 5.

In Fig. 5, the handling arm 10 is shown in its lower or basic position, i.e. when folded out of use, whereby the arm part 10a indicates a depression. Figure 5 shows the locking of the handling arm 10 to its lower or basic position by the locking means 23. The structure is similar for the handling arm 35.

7 90625

Also shown in Figures 1 to 3 and 5 are locking means 22 and 23, of which the first locking means 22 are adapted to lock the first handling arm 9 in its basic position, i.e. in its lower position. The second locking means 23 are adapted to lock the second handling arm 10 in its basic position, i.e. in its lower position. Figures 2, and in particular Figure 5, show a preferred embodiment for the locking means of the second handling arm 10. The locking means 23 comprise a first locking portion 23a fixed to the frame structure, a second locking portion 23b fixed to the arm portion 10a, and a vertically movable pin member 23c adapted to move within the first and second locking portions 23a, 23b. The substantially vertically moving pin 23c has the advantage that the pin automatically returns to the lower position by gravity, where the pin 23c locks the arm part 10a from the second locking part 23b to the first locking part 23a fixed to the frame structure. The structure is also similar for the locking means 22 of the first handle 20, which are partially nM in Figures 1 and 3. In Figure 3, the first locking means 22 cover the locking parts 22a and 22b and the dowel 22c. In Figures 1-3, the locking means are shown partly in cross-section.

In Fig. 1, reference numeral 9 shows a handling arm locked in its lower or basic position. The handling arm 9 is locked in its basic position by locking means 22. In some cases, the handling arm 9 is out of the exposed position, and therefore the locking caused by the locking means 22 cannot be turned to the position indicated by reference numeral 9 '. Although the handling arm 9 itself is turned to its basic position, i.e. out of view, it is nevertheless marked in the position shown by reference numeral 9 in Fig. 1. It can be seen from Figure 1 that the handling arm 9 pulleys a roller member 24 arranged in the free end of the handling arm 35. To attach the roller member 8 90625, a wheelchair pulleys a mounting arm 25 which is part of the roller member mounting means. In addition, the fastening means handle the locking member 26 fixed to the handling arm 9. The fastening of the roller member 24 5 to the handling arm can be performed by a contact between the locking member 26 and the fastening arm 25 of the roller member. In Fig. 1, the fastening arm 25 of the roller member 24 is fitted with the handling arm 9.

It can be seen from Figure 1 that, according to the invention 10, the roller member 24 rotatably attached but locked in its lower position, i.e. the basic position, is arranged to form an auxiliary wheel, i.e. a replacement wheel, on the actual large wheel 7a removed from the wheelchair shown in Figure 1. Figure 15 shows another actual Pyora 7b in the background. In the case according to Figure 1, from the rear of the wheelchair, the wheelchair is held vertically by the second actual wheel 7b and the first roller member 24, i.e. the auxiliary wheel 24, replacing the first actual wheel 7a, which is thus attached to the head of the first handling arm 9. Thus, the roller member 24, if necessary, forms a replacement wheel for the wheelchair actual wheel 7a.

With further reference to Figures 1 and 3, according to the invention, the handling arm 9 provides means for changing the articulation point 12 of the handling arm 9 25 and the distance between the roller member 24, i.e. the auxiliary wheel. In this case, in the basic position, i.e. the lower position, of the handling arm 9, the roller member is adapted to be lifted out of use, i.e. in use, from the base to the position shown in Fig. 3 by reference numerals 24 '' (roller member) and 25 '' (mounting arm). The position shown by reference numerals 24 '' and 25 '' in Fig. 3 is released by releasing the fastening between the fastening arm and the handling arm, the jaw fastening arm 25 and with it the roller member 24 are covered horizontally 180 degrees. The roller member 24 '' of TMllS no longer acts as an auxiliary wheel, but the roller member 9 90625 is in the air below the frame structure 1b. According to the invention, the shape of the fastening arm 25 differs from the straight shape of the arm, in which case the roller member 24 is adapted to be rotatable at a distance 5 determined by the shape of the fastening arm 25 about an axis formed by the processing arm 9. The roller member and, of course, the fastening arm itself are thus obtained by rotating the fastening arm to a new position. The fastening arm of the roller member is arranged inside the handling arm, whereby the height position of the roller member can be changed. The fastening arm stacks the upper flap 27, which when the roller member is in the lower position against the base, i.e. as an auxiliary wheel, is naturally located relatively low inside the handling arm 9. When the roller member 24 '' is in its up position, i.e. out of use, folded and raised, then the top of the fastening arm 25 '' is then located at a higher position, indicated by reference numeral 27 '.

In Fig. 1, the operating position of the handling arm 9, i.e. the position turned backwards, is indicated by reference numeral 9 '. Correspondingly, the roller member is indicated by reference numeral 24 '20 and the mounting member of the roller member is indicated by reference numeral 25'. In changing the position of the handling arm 9, the roller member 24 and the fixing arm 25 to the position shown by reference numerals 9 ', 24' and 25 'in Fig. 1, the locking means 22 are unlocked, the handling arm 25 being pivotable to its upper position. Next, the locking member 26 is unlocked, whereby the fastening arm 25 of the roller member and the roller member therein are rotated 180 degrees, with the mounting arm 25 '' pointing downward.

. The structure of the second side of the wheelchair shown in Figures 2 and 5 is substantially similar to the structure shown above in Figures 1 and 3. In Figure 2, reference numeral 10 shows a treatment arm locked in its lower position, i.e. its basic position. The handling arm 10 is locked in its basic position 35 by locking means 23. In this case, the handling arm 10 is out of the folded position 90625 and cannot be turned to the position indicated by reference numeral 10 ', i.e. to the reverse position, due to the locking caused by the locking means 23. Although the handling arm 10 itself has been turned to its basic position, i.e. away from view, it still has a meaning even in the position shown by reference numeral 10 in Fig. 2. It can be seen from Figure 2 that the handling arm comprises a second roller member 28 arranged in the free head of the handling arm. To attach the roller member to the treatment arm 10, a wheelchair comprises a mounting arm 29 which is part of the roller member mounting means. In addition, the fastening means comprise a second locking member 30 attached to the treatment arm 10. Attachment of the roller member 28 to the treatment arm can be performed by contact between the locking member 30 and the fastening arm 29 of the roller member 15 28. In Fig. 2, the fastening arm 29 of the roller member 28 is arranged with the handling arm 10 inwards.

It can be seen from Figure 2 that the second roller member 28 at the end of the handling arm 10 rotatably mounted according to the invention but locked in its lower position, i.e. the basic position 20, is adapted to form an auxiliary wheel, i.e. a replacement wheel, for the actual large wheel 7b Figure 2 shows the first actual wheel 7a, which is in the background. In the case according to Fig. 2, from the rear of the wheelchair, the first actual wheel 7a and the second roller member 28, i.e. the auxiliary wheel 28, replacing the second actual wheel 7b keep the wheelchair upright, which is thus fastened to the second handling arm 10 via its fastening arm 30 29. Thus, the second roller member 28, if necessary, forms a replacement wheel for the wheelchair's second actual wheel 7b.

With further reference to Figures 2 and 5, according to the invention, the treatment arm 10 comprises means for changing the distance between the articulation point 13 of the handling arm 35 10 and the roller member 28, i.e. the auxiliary wheel 11 90625. Then, in the basic position, i.e. the lower position, of the handling arm 10, the roller member 28 is adapted to be lifted out of use, i.e. in operation, from the base to the position shown in Fig. 5 by reference numerals 28 '' (roller member) and 29 '' (mounting arm). From the position 28, 29 of Fig. 2 to the position shown by the reference numerals 28 '' and 29 '' of Fig. 5, the locking member 30 is released by releasing the mounting arm 29 and the handling arm 10, after which the mounting arm 10 and the roller member are pulled down and the mounting arm 29 and accompanied by a second roller member 28 horizontally 180 degrees. In this case, the roller member 28 '' no longer functions as an auxiliary wheel, but the roller member is in the air below the frame structure 2b according to Fig. 5. According to the invention, the shape of the fastening arm 15 29 differs from the straight shape of the arm, whereby the roller member 28 is adapted to be rotatable at a distance determined by the shape of the fastening arm 29 about an axis formed by the handling arm 10. The roller member 28 and, of course, the fastening arm 29 itself are thus obtained by rotating the fastening arm 20 29 to a new position. The fastening arm 29 of the roller member is arranged inside the handling arm 10, whereby the height position of the roller member can be changed.

In a manner similar to the first mounting arm in Figure 3, the second mounting arm 29 in Figures 2 and 5 also has different positions within the handling arm 10.

In Fig. 2, the operating position of the handling arm 10, i.e. the position extended backwards, is indicated by the reference numeral 10 '. Correspondingly, the second roller member is shown at 30-30 and the mounting arm of the roller is shown at 29. In changing the position of the handling arm 10, the roller member 28 and the fixing arm 29 to the position shown by reference numerals 10 ', 28' and 29 'in Fig. 2, the locking means 23 are unlocked so that the handling arm can be tilted to its upper position, i.e. 12,90625. Next, the locking member 30 is released, whereby the roller member handling arm 29 and the associated roller member 28 are rotated 180 degrees, with the mounting arm pointing downward.

According to Figures 1 and 2, in a preferred embodiment of the invention, in the retracted position of the handling arms 9 'and 10' in the rearward-facing operating position, the fastening arms 25 'and 29' of the roller members 24 'and 28' form a downwardly shaped and fastening arm shape in a downward manner. to the handling arms of the handle structure 32, 33. This structure allows the length of the handling arms to be changed depending on the type of person assisting the person in the wheelchair. In addition, the downwardly directed handle structure improves the grip of the 15 assisting personnel on the handling arms.

In a preferred embodiment of the invention, according to Figure 3, the roller member 24 '' is preferably adapted to be pivotable below the frame structure 1b of the Pyora chair by a horizontal rotational movement. In this case, the auxiliary wheel, i.e. the roller member 20, can be easily turned out in use and, correspondingly, raised with the opposite movement. The structure is, of course, similar for the second roller member 28 and the second mounting arm 29.

Fig. 4a shows a roller member 24 and its mounting 25 arm 25, and Fig. 4b shows a planarly applied portion of the roller member mounting arm. The mounting arm 25 is preferably a hollow cross-sectional tubular Kap-piece comprising a thin wall 34a. A roller member 24 is attached to the bottom of the fastening arm. The fastening arm kå-30 engages the upper 27, the position of which was already handled in connection with Fig. 3 in various situations within the handling arm. The structures of the fastening arm and the surrounding handling arm provide fastening means for the roller member 24 which allow the distance between the articulation point 35 12 of the handling arm and the roller member 24 to be changed. The mounting arm 25 comprises a sliding groove 35, which preferably comprises at least two substantially vertical parts 35a, 35b and a part 35c therebetween, which is preferably horizontal. Fig. 4c shows a cross-section of the hand arm 5 with the roller member in the upper position, i.e. in the raised position, i.e. in the position shown in Fig. 3 by reference numerals 24 '' and 25 ''. Fig. 4d shows a cross-section of the treatment arm with the roller member in the lower position, i.e. as an auxiliary wheel against the base, shown in Figs. 1, 10 and 3 by reference numerals 24 and 25. The cross-section of Figs. 4c and 4d is taken at the upper edge of the horizontal portion 35c. In Figures 4c and 4d, for the sake of clarity, it is stated that the roller member is located furthest from the viewer, i.e. the lowest. The treatment-15 arm 9 is stacked on a thin wall 34b.

Referring to Figures 1 and 4a to 4d, in a preferred embodiment of the invention, the fastening arm 25 thus comprises a sliding groove 35, the handling arm 9 comprises a protrusion 36 to be fitted in the sliding groove 35 and in addition a roller member 20 is arranged between the arm 25 and the handling arm 9. The spring means 37 appears in Fig. 1, but it should be noted that the spring is in fact invisible inside the handling arm 9. In Fig. 1, only the part of the protrusion 36 visible on the surface of the treatment arm 9 is visible. The projection shown in Figures 1 and 4c and 4d is a bolt attached to the treatment arm which horizontally pierces the treatment arm wall 34b and further in the sliding groove 35 of the mounting arm 25. Similarly, in Figure 2, the second treatment arm comprises only a second projection 38 , which is visible on the surface of the treatment arm 10. Figure 2 also shows a second spring means 39 comprised by the second processing arm, which is in fact located inside the processing arm 10. The structure described above is a usable and reliable structure for attaching the fastening arms and thereby also the roller members in a multi-purpose manner.

It can be seen from Figures 4a and 4b that the fastening arm 25 abuts the two locking openings 40a and 40b. The locking openings 40a and 40b are intended for the locking member 26 of the locking member 5 shown in Figs. 1 and 3. The locking member 26, like the second locking member 30 in Fig. 2, is preferably a spring-return horizontal locking release member which engages the lower locking opening 40a when the roller is raised to its upper-10 position according to Fig. 3, i.e. to a position in which the fastening arm 25 '' of the roller member is relatively deep inside the handling arm 9. When the roller member 24 has been dropped to its lower position, i.e. as an auxiliary wheel, the locking member 26 is placed in the upper locking opening 40b.

It can be seen from Figures 1, 2, 4a to 4d that in a preferred embodiment of the invention both the handling arm 9, respectively 10 and the roller member mounting arm 25, respectively 29, are hollow tubular bodies and are arranged relative to each other and that the spring means 20 37, respectively 39, are arranged on the inside of the assembly formed by the fastening arm and the processing arm. The spring means of the tållb is arranged in such a way that it can be easily ensured that the handling arm and the fastening arm remain attached to each other, especially when the roller member 25 and thus also the fastening arm are being turned to a new position.

Figure 4a shows a lower attachment point 41a for the spring on the mounting arm 25. Figures 1 and 3 show an upper attachment point 41b to which the top of the spring-30 selector 37 can be attached. In fact, the upper attachment point is hidden inside the handling arm. In a preferred embodiment of the invention, the upper attachment point 41b of the spring means 37 is in the vicinity of the articulation point 12 of the handling arm 9. In this case, the placement of the spring is implemented in a usable manner.

15 90 625

The spring line 37 is not shown in Figures 4c and 4d. In Figs. 4c and 4d, the unlined area shows the middle part 35c of the sliding groove. Fig. 4c also shows a shorter vertical part 35a of the sliding groove, which is hollow, but a protrusion 36 is visible at the bottom of the longer part of the vertical sliding groove. In the position according to Fig. 4c, i.e. the roller member is in the upper position, the protrusion 36 in the base 43 of the part 35b (Figs. 4a, 4b) due to the upward pull of the spring means 37 ai-10. In the position according to Fig. 4d, i.e. with the roller member in the lower position, the projection 36 of the treatment arm 9 is located in the bottom 44 (Figs. 4a, 4b) of the shorter vertical part 35a of the sliding groove due to the upward pull caused by the spring means 37. The structure of the sliding groove 35 is most clearly seen in Figures 4a and 4b.

In a preferred embodiment of the invention, the substantially vertical sliding grooves 35a and 35b are arranged on opposite sides of the wall 34a of the mounting arm 25 according to Figures 20a and 4b. With the structure described above, it is easy to realize the roll members and thus also the fastening arms by a semicircle, i.e. about 180 degrees. It can be seen from Figures 4a and 4b that in a preferred embodiment of the invention the lengths of the vertical sliding grooves 35a and 35b differ significantly from each other, whereby the difference in the length of the sliding grooves provides the necessary height difference for the different positions of the roller member. The length of the shorter sliding groove 35a is preferably at most a quarter of the length of the longer sliding groove.

Referring to Figs. 1, 3 and 4a to 4c, it is stated that the rolling member and the fastening arm are moved from the position according to Fig. 4c to the position according to Fig. 4d, preferably by locking the locking member 26 horizontally, leaving the locking member 26 out of the lower locking opening 4 . Next, the mounting arm 25 is pulled down against the spring force of the spring 37, whereby the longer vertical sliding groove 35b slides along its entire length past the protrusion 36. Next, the mounting arm is rotated, i.e., rotated horizontally, whereby the sliding groove 35c between the portions of the sliding groove in the longitudinal direction slides along the entire length of the protrusion 36. Finally, the spring force of the spring 37 is adapted to pull the shorter vertical sliding groove portion 35a past the protrusion, whereby the spring 37 also helps to lock the fastening arm. Finally, it is ensured that the locking member 26 is made to fit in the upper locking opening in the mounting arm 25. When moving from the figures 4d to the position according to Fig. 4c, the operation is performed in a counter-pressure order.

The sliding grooves of the mounting arms, the projections of the handling arms, the locking openings of the mounting arms and the locking members of the handling arms are all means of making it possible to change the distance between the articulation points of the handling arms and the roller members in an easy manner.

The distance between the locking openings 40a and 40b is substantially the same as the distance between the arch ends 43 and 44 of the vertical grooves 35a and 35b. In this case, the operation of the locking members is well compatible with the sliding grooves and projections.

In Fig. 5, the articulation point 13 abuts the first hinge portion 13a and the second hinge portion 13b adapted to rotate relative to the first hinge portion 13a. The locking means 23 further provide a lifting pin 23d attached to the dowel piece 23c.

It is important for the structure according to the invention that the distance between the roller members arranged in the ground of the handling arms is shorter than the distance between the actual wheels 7a and 7b.

Although the invention has been described above with reference to the examples according to the accompanying drawings, it is clear that the invention is not limited thereto, but that it can be modified in many ways within the scope of the inventive idea set forth in the appended claims.

Claims (8)

A wheelchair for handling a frame structure with side structures (1 and 2), backrests (5) and a seat part (6), 5 several wheels (7a, 7b, 8a, 8b) for moving the wheelchair, and handle arms rotatably attached to the rear of the frame structure (9 and 10) which are adapted to be foldable from their substantially vertical basic position, i.e. their lower position, and which, when folded out (9 '10 and 10') in their position of use, extend backwards when the handling arms (9 'and 10') are folded by the handling arms. roller members (24 ', 287) fixed to the outermost positions, characterized in that the wheelchair handles the locking means (22 and 23) for locking the handling arms (9 and 10) rotatably mounted and provided with roller members 15 (24, 28) in a substantially vertical position. in which the roller member (24, 28) of one or more rotatably mounted but locked in its basic position, i.e. the lower position, is arranged to form a ground-replacing wheel (20, 28). for the actual wheel (7a, 7b) of the wheelchair, the means for changing the distance between the articulation points (12,13) of the handling arms (9, 10) and the roller members (24, 28) and that the roller members (24, 28) are attached on the handling arms 25 (9, 10) by selecting fastening arms (25, 29) having a shape different from the straight shape of the arm, the roller members (24, 28) being adapted to be rotated at a distance from the shape of the fastening arms (25, 29) formed by the handling arms (9, 10) around the axes. : 30 Wheelchair according to Claim 1, characterized in that the fastening arms (25 ', 29') of the roller members (24 ', 28') in the extended rearward operating position of the handling arms (9 ', 10') form a retractable arm and the fastening arms 35 (25) ', 29') in a manner defined by the shape of the downwardly directed handle arms (9 ', 10') of the downwardly directed handle structure (90, 33). Wheelchair according to Claim 1 or 2, characterized in that the fastening arm (25, 29) of the roller element (24, 28) abuts the sliding groove (35) and that the handling arm (9, 10) abuts the sliding groove (35). 35) a spring tongue (37,39) is arranged between the adjustable projection (36,38) and the fastening arm (25,29) and the handling arm (9,10) of the roller member (24,28). Wheelchair according to Claim 3, characterized in that both the handling arm (9, 10) and the fastening arms (25, 29) of the roller members (24, 28) are hollow tubular bodies and are arranged one on top of the other and that the spring (37) , 39) is arranged on the inside of the assembly formed by the fastening arm (25, 29) and the handling arm (9, 10). Wheelchair according to Claim 3 or 4, characterized in that the sliding groove (35) of the fastening arm (25, 29) of the roller element (24, 28) has at least two substantially vertical sliding grooves (35a, 35b) and at least one other sliding groove (35c) located in the wedges of the vertical sliding grooves (35a, 35b). Wheelchair according to Claim 5, characterized in that the substantially vertical sliding grooves (35a, 35b) are arranged on opposite sides of the fastening arm (25, 29). Wheelchair according to Claim 5 or 6, characterized in that the lengths of the vertical sliding grooves (35a, 35b) differ significantly from one another. Wheelchair according to claim 1, characterized in that the locking means (22, 23) comprise a first locking part (22a, 23a) fixed to the frame structure, a second locking part (22b, 23b) fixed to the arm part (9a, 10a) and vertically movable. an adapted dowel body (22c, 23c) adapted to move:. 35 includes a first locking portion (22a, 23a) and a second locking portion (22b, 23b). 20 90625