JP2014061040A - Arm rest mechanism for wheelchair ad wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arm rest mechanism for a wheelchair capable of improving safety of an occupant in a wheelchair in which a chair back guide part can be reclined.SOLUTION: An arm rest receiving part 18 supports an arm rest 3 arranged at a side part of a wheelchair 1, a slide mechanism configured by a slider 20 and a slider operation part 19, when a chair back guide part 4a reclines backward, interlocks with the reclining of the chair back guide part 4a, allows the arm rest receiving part 18 to slide backward of the wheelchair 1, and when the chair back guide part 4a rises frontward of the wheelchair 1, interlocks with the rising of the chair back guide part 4a and allows the arm rest receiving part 18 to slide frontward of the wheelchair 1.

Description

  The present invention relates to an armrest mechanism that operates an armrest of a wheelchair.

  Wheelchairs with reclining mechanisms have been known for some time. The reclining mechanism is a mechanism that allows the backrest of the wheelchair to tilt backward. In Patent Document 1, in addition to the reclining mechanism, the step member (chair leg guide part) is rotated and lifted near the occupant's knee in conjunction with the backrest part (chair back guide part) falling backward. A wheelchair has been proposed that includes a mechanism and a mechanism that rotates and suspends a step member in the vicinity of the occupant's knee in conjunction with the backrest portion rising up forward. According to this wheelchair, when the chair back guide part (backrest part) falls down to a horizontal position, the chair leg guide part (step member) is almost horizontal at the same height as the chair back guide part. Therefore, the occupant can lie down and rest in a state close to his / her back.

  However, when the chair leg guide part is operated in conjunction with the chair back guide part falling down, the armrest exists only at the position of the occupant's waist when the chair back guide part is tilted backward. Therefore, as the angle at which the chair back guide portion is tilted increases, the possibility that the occupant falls from the head or upper body to the left and right increases. In Patent Document 2, in order to prevent the occupant from falling from the side of the wheelchair, a mechanism for folding the armrest backwards in conjunction with the backrest frame (chair spine guide part) falling backward is linked. Proposed wheelchairs have been proposed.

  In the wheelchair described in Patent Document 2, the armrest is rotatably provided on the side of the wheelchair by a support link including a four-bar link, and further, the rear end of the armrest (the end on the backrest frame side) ) Is pivotably locked to the backrest frame. With this configuration, the armrest is folded backward and moved backward while the backrest frame is folded backward. This movement of the armrest prevents the occupant from falling from the side of the wheelchair.

JP 2002-301108 A JP 2005-328980 A

  However, in the wheelchair described in Patent Document 2, as the backrest frame (chair spine guide part) falls backward, the height of the armrest decreases and the backrest frame collapses until the posture is almost horizontal. Sometimes the armrest is lowered to the same height as the backrest frame. For this reason, when the backrest frame is in a substantially horizontal posture, the occupant cannot be prevented from falling to the left and right, and the occupant may fall from the head and be seriously injured. In addition, when the backrest frame falls down, the armrest is folded, so that the occupant's arms and hands are placed between the armrest and the backrest frame (chair back bottom) or between the armrest and the waistrest frame (chair waist bottom). There is a possibility of being injured by the passenger.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an armrest mechanism for a wheelchair and a wheelchair that can improve the safety of an occupant.

  An armrest mechanism for a wheelchair according to the present invention is an armrest mechanism for a wheelchair installed in a wheelchair, wherein the armrest is disposed on a side portion of the wheelchair, an armrest receiving portion that supports the armrest, and the armrest receiving portion is slid A slide mechanism that moves the armrest receiving part to the rear side of the wheelchair in conjunction with the chair back guide part falling when the chair back guide part of the wheelchair falls backward. When the chair back guide part rises to the front side of the wheelchair, the armrest receiving part is slid to the front side of the wheelchair in conjunction with the chair back guide part rising. .

  ADVANTAGE OF THE INVENTION According to this invention, when a chair back guide part falls backward or when a chair back guide part is a horizontal attitude | position, the reduction of the risk that a passenger | crew falls from the head or upper body to right and left can be aimed at. In addition, since the armrest is not folded during reclining of the chair back guide, the risk of the passenger's arms and hands being caught between the armrest and the chair back bottom or between the armrest and the chair waist bottom is reduced. be able to. Therefore, the safety of the passenger can be improved.

The right view which shows the wheelchair of the chair attitude | position in Embodiment 1. The right view which shows a part of wheelchair of the chair attitude | position in Embodiment 1. The right view which shows a part of wheelchair of the flat attitude | position in Embodiment 1. It is a partial enlarged view of the wheelchair in Embodiment 1, (a) is a side view which expands and shows the 1st link part when a wheelchair is a chair posture, (b) is the 1st when a wheelchair is a flat posture. Side view showing enlarged link The right view which shows the principal part of the wheelchair of the chair attitude | position in Embodiment 1. The partially expanded sectional view which shows the slider of the wheelchair in Embodiment 1 The enlarged side view which shows the armrest receiving part of the wheelchair in Embodiment 1 It is a figure for demonstrating the operation | movement which an armrest receiving part slides in the wheelchair of Embodiment 1, (a) is a figure which shows the position of an armrest receiving part when a wheelchair is a chair attitude, (b) is a wheelchair a chair The figure which shows the position of the armrest receiving part in the middle of deform | transforming from an attitude | position to a flat attitude | position, (c) is a figure which shows the position of an armrest receiving part when a wheelchair is a flat attitude | position. The right view which shows the principal part of the wheelchair of the flat attitude | position in Embodiment 1. The right view which shows the principal part of the wheelchair of the chair attitude | position in Embodiment 2. The right view which shows the principal part of the wheelchair of the flat attitude | position in Embodiment 2. The right view which shows the wheelchair of the chair attitude | position in Embodiment 3. The right view which shows the wheelchair of the flat attitude | position in Embodiment 3. The right view which shows the other example of the wheelchair of the chair attitude | position in Embodiment 3. The right view which shows the other example of the wheelchair of the flat attitude | position in Embodiment 3.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the same reference numerals are given to the same constituent elements, thereby omitting redundant description. In addition, each drawing referred to in the following description is simplified and schematically shown only for the main members necessary for describing the embodiment of the present invention for convenience of description. Therefore, the present invention can include any member not shown in the drawings. In addition, the dimensions and shapes of the members in each figure do not faithfully represent the actual dimensions or shapes of the members for the convenience of drawing. It is not a faithful representation of the dimensional ratio.

  The embodiment described below is an exemplification of the embodiment of the present invention, and the present invention is not limited to the embodiment described below, and is substantially from the effect of the present invention. Various modifications can be made without departing from the scope. Therefore, numerical values shown in the following embodiments are also examples and are not particularly limited, and various changes can be made without departing from the effects of the present invention.

(Embodiment 1)
FIG. 1 is a right side view showing the wheelchair of the first embodiment. The wheelchair 1 according to the first embodiment includes a reclining mechanism that allows the chair back guide portion 4 a that supports the chair back bottom 2 a to be inclined toward the rear side of the wheelchair 1. Further, when the wheelchair 1 falls so that the chair back bottom 2a (chair back guide portion 4a) is horizontal, the chair bottom 2 is deformed into a flat posture, and the chair back bottom 2a (chair back guide portion 4a) rises. The chair bottom 2 has a mechanism for deforming into a chair posture. Further, the wheelchair 1 moves the armrest 3 to the rear side of the wheelchair 1 in conjunction with an operation of tilting the chair back bottom 2a (chair back guide portion 4a) so as to be horizontal (hereinafter referred to as “reclining”). An armrest mechanism for sliding is provided. The armrest mechanism that slides the armrest 3 is a characteristic configuration of the present invention.

  First, a configuration of the wheelchair 1 excluding the armrest mechanism and a mechanism for changing the posture of the wheelchair 1 (the posture of the chair bottom 2) will be described.

  FIG. 2 is a right side view illustrating a part of the wheelchair according to the first embodiment. In FIG. 2, the armrest mechanism of the wheelchair 1 is omitted.

  The wheelchair 1 includes a chair bottom 2, a chair guide part 4, a chair base part 5, a traveling wheel 6, a first link part 7, a second link part 8, and a foot link interlocking link 9.

  The chair bottom 2 is a chair back bottom 2a, a chair waist bottom 2b that is flexibly connected to the chair back bottom 2a, a chair knee bottom 2c that is flexibly connected to the chair waist bottom 2b, and a chair knee bottom 2c. The chair leg first bottom 2d connected to the chair leg and the chair leg second bottom 2e connected to the chair leg first bottom 2d so as to be bent. The chair leg second bottom 2e is a footrest when the wheelchair 1 is in the chair posture.

  The chair guide portion 4 includes a chair back guide portion 4a capable of supporting the chair back bottom 2a by contacting the chair back bottom 2a, and a chair knee guide capable of supporting the chair knee bottom 2c by contacting the chair knee bottom 2c. 4c, a chair leg first guide part 4d that is rotatably connected to the chair knee guide part 4c and can contact the chair leg first bottom 2d to support the chair leg first bottom 2d; It is comprised from the chair leg 2nd guide part 4e which can be connected to 1 guide part 4d so that rotation is possible, and can contact this chair leg 2nd bottom 2e, and can support this chair leg 2nd bottom 2e. The chair back guide portion 4a is rotatably connected to the rear end of the chair waist bottom 2b (end portion on the rear side of the wheelchair 1), and the chair knee guide portion 4c is connected to the front end of the chair waist bottom 2b (front of the wheelchair 1). Side end) is rotatably connected.

  The chair base 5 preferably supports the chair waist bottom 2b horizontally.

  A plurality of traveling wheels 6 are provided in the wheelchair 1 and support the chair waist bottom 2b from below.

  When the wheelchair 1 is in the chair posture shown in FIG. 2, the chair back guide portion 4a stands up diagonally so that the upper end of the chair back guide portion 4a is located on the rear side of the wheelchair 1 with respect to the lower end of the chair back guide portion 4a. doing. At this time, the chair knee guide portion 4c is moved by the first link portion 7 so that the front end of the chair knee guide portion 4c (the end on the chair leg first guide portion 4d side) is the rear end (chair waist) of the chair knee guide portion 4c. The posture is slightly raised upward so as to be positioned higher than the bottom 2b end.

  When the wheelchair 1 is in the chair posture shown in FIG. 2, the lower end of the chair leg first guide part 4d is positioned on the front side of the wheelchair 1 with respect to the upper end of the chair leg first guide part 4d. As described above, the second link portion 8 is in a posture suspended obliquely downward.

  When the wheelchair 1 is in the chair posture shown in FIG. 2, the chair leg second guide part 4 e is such that the front end (tip) of the chair leg second guide part 4 e is the rear end of the chair leg second guide part 4 e (chair leg first guide). The posture is caused to rise slightly diagonally upward by the foot-link interlocking link 9 so as to be positioned above the end portion on the side of the portion 4d.

  FIG. 3 is a right side view showing a part of the wheelchair in the flat posture according to the first embodiment. In FIG. 3, the armrest mechanism of the wheelchair 1 is omitted.

  As shown in FIG. 3, the chair knee guide part 4c, the chair leg first guide part 4d, and the chair leg second guide part 4e are arranged so that the first link part 7 Due to the two link portions 8 and the foot placement interlocking link 9, a horizontal posture is obtained at the same height as the chair back guide portion 4a. That is, the chair back guide part 4a, the chair knee guide part 4c, the chair leg first guide part 4d, and the chair leg second guide part 4e constitute one flat surface when the chair back guide part 4a is tilted horizontally. To do. At this time, the chair back bottom 2a, the chair waist bottom 2b, the chair knee bottom 2c, the chair leg first bottom 2d, and the chair leg second bottom 2e similarly constitute one flat surface. Therefore, the chair bottom 2 of the wheelchair 1 is in a flat posture.

  The 1st link part 7 connects the chair back guide part 4a and the chair knee guide part 4c. When the wheelchair 1 is deformed from the chair posture shown in FIG. 2 to the flat posture shown in FIG. 3, the first link portion 7 is the chair back guide portion 4a centering on the connecting portion between the chair back guide portion 4a and the chair waist bottom 2b. In the direction opposite to the direction in which the chair back guide portion 4a rotates around the connecting portion between the chair waist bottom 2b and the chair knee guide portion 4c in conjunction with the rotation of the wheelchair 1 toward the rear side and falling down. The chair knee guide part 4c is rotated and brought down. As a result, the front end of the chair knee guide portion 4c is at the same height as the rear end of the chair knee guide portion 4c, and the chair knee guide portion 4c is in a flat posture. On the other hand, when the wheelchair 1 is deformed from the flat posture shown in FIG. 3 to the chair posture shown in FIG. 2, the first link portion 7 is a chair back guide centering on the connecting portion between the chair back guide portion 4a and the chair waist bottom 2b. The direction opposite to the direction in which the chair back guide part 4a rotates around the connecting part between the chair waist bottom 2b and the chair knee guide part 4c in conjunction with the part 4a turning to the front side of the wheelchair 1 and getting up. The chair knee guide 4c is rotated in the direction of As a result, the front end of the chair knee guide portion 4c is higher than the rear end of the chair knee guide portion 4c, and the chair knee guide portion 4c is in a posture that is raised slightly diagonally upward.

  The second link portion 8 connects the chair back guide portion 4a and the chair leg first guide portion 4d. When the wheelchair 1 is deformed from the chair posture shown in FIG. 2 to the flat posture shown in FIG. 3, the second link portion 8 is a chair back guide portion 4a centering on the connecting portion between the chair back guide portion 4a and the chair waist bottom 2b. Is the same as the direction in which the chair back guide portion 4a rotates around the connecting portion between the chair knee guide portion 4c and the chair leg first guide portion 4d in conjunction with the pivoting to the rear side of the wheelchair 1 and falling down. The chair leg first guide portion 4d is rotated in the direction. As a result, the lower end of the chair leg first guide part 4d (the end part on the chair leg second guide part 4e side) is lifted, and the chair leg first guide part 4d is in a flat posture. On the other hand, when the wheelchair 1 is deformed from the flat posture shown in FIG. 3 to the chair posture shown in FIG. 2, the second link portion 8 is a chair back guide centering on the connecting portion between the chair back guide portion 4a and the chair waist bottom 2b. The direction in which the chair back guide portion 4a rotates around the connecting portion between the chair knee guide portion 4c and the chair leg first guide portion 4d in conjunction with the raising of the portion 4a to the front side of the wheelchair 1. The chair leg first guide portion 4d is rotated in the same direction. As a result, the front end of the chair leg first guide portion 4d (the end portion on the chair leg second guide portion 4e side) is lowered, and the chair leg first guide portion 4d is inclined obliquely downward (hanging obliquely downward). Lowered posture).

  The foot link interlocking link 9 connects the chair knee guide portion 4c and the chair leg second guide portion 4e. When the wheelchair 1 is deformed from the chair posture shown in FIG. 2 to the flat posture shown in FIG. 3, the foot placement link 9 is linked to the movement of the chair knee guide portion 4c and the chair leg first guide portion 4d. The chair leg second guide portion 4e is rotated and tilted in the same direction as the direction in which the chair knee guide portion 4c rotates around the connecting portion between the first guide portion 4d and the chair leg second guide portion 4e. As a result, the chair knee guide part 4c and the chair leg second guide part 4e become parallel, and the chair leg second guide part 4e assumes a flat posture. On the other hand, when the wheelchair 1 is deformed from the flat posture shown in FIG. 3 to the chair posture shown in FIG. 2, the foot link interlocking link 9 has a connecting portion between the chair leg first guide portion 4d and the chair leg second guide portion 4e. The chair leg second guide part 4e is pivoted in the same direction as the chair knee guide part 4c in the center, and the tip of the chair leg second guide part 4e is the rear end of the chair leg second guide part 4e. The chair leg second guide portion 4e is set to a posture that is slightly inclined upward.

  With such a configuration of the wheelchair 1, the chair knee guide portion 4c, the chair leg first guide portion 4d, and the chair leg second guide portion 4e operate in conjunction with the operation of the chair back guide portion 4a. Therefore, the wheelchair 1 (chair bottom 2) is deformed from a chair posture to a flat posture only by defeating the chair back guide portion 4a. Moreover, the wheelchair 1 (chair bottom 2) will deform | transform from a flat attitude | position to a chair attitude | position only by raising the chair back guide part 4a. Therefore, the posture of the wheelchair 1 (chair bottom 2) can be easily changed manually.

  Further, when the wheelchair 1 is in the chair posture, the chair knee bottom 2c is inclined upward with respect to the horizontal chair waist bottom 2b. Preferably, the front end of the chair knee bottom 2c (the end on the chair leg first bottom 2d side) is about 10 degrees vertically upward with respect to the rear end of the chair knee bottom 2c (end on the chair waist bottom 2b side). The chair knee bottom 2c is tilted so as to increase in angle. As described above, since the chair knee bottom 2c is inclined upward with respect to the horizontal chair waist bottom 2b, the chair back bottom 2a, the chair waist bottom 2b, and the chair knee bottom 2c are formed into depressions. It is difficult for the occupant to slip off the wheelchair 1.

  Here, one structural example of the 1st link part 7, the 2nd link part 8, and the footrest interlocking link 9 is demonstrated with reference to FIGS. FIG. 4 is a partially enlarged view of the wheelchair according to the first embodiment. Specifically, FIG. 4A shows an enlarged view of the first link portion 7 when the wheelchair 1 is in a chair posture, and FIG. 4B shows the first link portion when the wheelchair 1 is in a flat posture. 7 is shown enlarged.

  The first link portion 7 includes a first arm member 10 fixed to the back surface of the chair back guide portion 4a, a cam portion 11 rotatably connected to the chair base portion 5, a first arm member 10 and a cam. It is comprised from the rod-shaped 1st connection member 12 which connects the part 11. FIG. The first arm member 10 has a proximal end fixed to the back surface of the chair back guide portion 4a, and a branch portion 10a is provided at the distal end portion. The first arm member 10 is in the state shown in FIG. 4A when the wheelchair 1 is in the chair posture, and is in the state shown in FIG. 4B when the wheelchair 1 is in the flat posture. The first connecting member 12 has one end rotatably connected to the branch portion 10 a and the other end rotatably connected to the lower end portion of the cam portion 11. A central portion of the cam portion 11 is rotatably connected to a cam portion rotation shaft 13 provided on the chair base portion 5. An arcuate groove 14 is formed at the upper end of the cam 12. A guide shaft 15 slidably engaged with the groove portion 14 of the cam portion 11 is fixed to the chair knee guide portion 4c.

  The second link portion 8 connects the first arm member 10, the second arm member 16 fixed to the back surface of the chair leg first guide portion 4 d, and the first arm member 10 and the second arm member 16. A rod-shaped second connecting member 17 is provided. The second arm member 16 has a proximal end fixed to the back surface of the chair leg first guide portion 4d. The second connecting member 17 is pivotally connected to the first arm member 10 at one end pivotally connected to the first arm member 10 at a position closer to the distal end than the branch portion 10 a in the first arm member 10 and to the distal end of the second arm member 16. It has an other end to be connected, and is configured to be retractable so that the wheelchair 1 contracts when deformed from the chair posture to the flat posture, and extends when the wheelchair 1 deforms from the flat posture to the chair posture. As the second connecting member 17, for example, a gas spring or a linear actuator can be used.

  The foot link interlocking link 9 has the same length as the chair leg first guide part 4d, and is rotatable to the chair knee guide part 4c in the vicinity of the connecting part between the chair knee guide part 4c and the chair leg first guide part 4d. And one end connected to the chair leg second guide part 4e in the vicinity of the connecting part between the chair leg first guide part 4d and the chair leg second guide part 4e. When the wheelchair 1 is in the chair posture, the foot link interlocking link 9 is disposed in parallel to the chair leg first guide part 4d at a position away from the chair leg first guide part 4d.

  Next, the armrest mechanism that is a feature of the present invention will be described. The armrest mechanism is installed in the wheelchair 1 capable of reclining the chair back bottom 2a (chair back guide portion 4a). In the wheelchair 1, a pair of armrests 3 are disposed on the left and right sides (both sides) of the wheelchair 1. Therefore, the armrest mechanism is provided on both the left and right sides (both sides) of the wheelchair 1. However, since the armrest mechanisms provided on the left and right sides of the wheelchair 1 have the same configuration, in the following description, only one (right) armrest mechanism will be described, and the other (left) armrest mechanism will not be described. Omitted.

  FIG. 5 is a right side view showing the wheelchair in the chair posture in the first embodiment. However, in FIG. 5, the armrest 3 is indicated by an imaginary line so that the inner structure of the armrest 3 can be understood.

  As shown in FIG. 5, the armrest mechanism of the wheelchair 1 according to the first embodiment includes an armrest 3 disposed on the side of the wheelchair 1, an armrest receiving portion 18 capable of detachably supporting the armrest 3, and a chair base. A slider (see FIG. 6) that is fixed to the side of the base 5 and supports the armrest receiving portion 18 so as to be slidable in the X direction, and the armrest receiving portion 18 is slid in a direction parallel to the surface of the chair waist bottom 2b by the slider. And a slider operating unit 19 to be operated. The slide mechanism that slides the armrest receiving portion 18 includes a slider 20 and a slider operating portion 19. The slider actuating portion 19 slides the armrest receiving portion 18 to the rear side of the wheelchair 1 with the slider in conjunction with the chair back guide portion 4a (chair back bottom 2a) falling to the rear side of the wheelchair 1. The armrest receiving portion 18 is slid to the front side of the wheelchair 1 by the slider in conjunction with the guide portion 4a (chair back bottom 2a) rising to the front side of the wheelchair 1. In other words, the armrest mechanism according to the first embodiment works in parallel with the posture change of the chair bottom 2 of the wheelchair 1 including the chair back bottom 2a in a direction parallel to the surface of the chair waist bottom 2b (preferably horizontal). In the right direction). Specifically, in the armrest mechanism of the first embodiment, when the chair back bottom 2 a falls to the rear side of the wheelchair 1, the armrest 3 is slid to the rear side of the wheelchair 1, and the chair back bottom 2 a is the front of the wheelchair 1. When getting up to the side, the armrest 3 is slid to the front side of the wheelchair 1.

  The armrest receiving portion 18 has a plugged portion 18 a as a fixing member for fixing the armrest 3 to the armrest receiving portion 18. A long hole is formed in the inserted portion 18a in a direction (Z direction) perpendicular to the surface of the chair waist bottom 2b. The inserted portion 18 a is disposed on the outer surface of the main body 18 b of the armrest receiving portion 18. A rod-like insertion member (not shown) that is long in the Z direction is fixed to the lower end of the armrest 3. The armrest 3 is fixed to the armrest receiving portion 18 by inserting the insertion member of the armrest 3 into the inserted portion 18 a of the armrest receiving portion 18. The insertion member of the armrest 3 can be inserted into and removed from the inserted portion 18 a of the armrest receiving portion 18. Therefore, the armrest receiving portion 18 can detachably support the armrest 3. Instead of providing the inserted portion 18a on the outer surface of the main body 18b of the armrest receiving portion 18, the inserted portion (that is, a hole long in the Z direction) may be formed in the main body 18b of the armrest receiving portion 18. Good. Between the armrest receiving portion 18 and the chair base portion 5, a slider 20 is provided that supports the armrest receiving portion 18 so as to be slidable in a direction (X direction) parallel to the surface of the chair waist bottom 2b.

  FIG. 6 is a partially enlarged sectional view showing the slider in the first embodiment. Specifically, FIG. 6 is a part of a cross section obtained by cutting the slider 20 along the YZ plane, and shows a part of the cross section taken along the line AA of FIG.

  As shown in FIG. 6, the slider 20 includes a slider fixing portion 20a fixed to a side portion of the chair base portion 5 of the wheelchair 1, and a slider movable portion 20b that can slide in the slider fixing portion 20a. The slider fixing portion 20a attached to the chair base portion 5 has a letter C shape in cross section and is long in the X direction. Therefore, the slider movable portion 20b slides in the X direction within the slider fixing portion 20a. A part of the slider movable portion 20b protrudes from the opening of the C-shaped slider fixing portion 20a having a cross-sectional view C, and a part of the slider movable portion 20b protruding from the slider fixing portion 20a The main body 18b is fixed. For this reason, the armrest receiving portion 18 installed on the slider 20 can slide in the X direction by the slider movable portion 20b. The main body 18b of the armrest receiving portion 18 and the slider movable portion 20b may be integrated. Moreover, the slider movable part 20b may slide and move in the slider fixing | fixed part 20a.

  FIG. 7 is an enlarged side view showing the armrest receiving portion in the first embodiment. Specifically, FIG. 7 shows the armrest receiving portion 18 viewed from the inside of the wheelchair 1. On the inner side surface of the main body 18b of the armrest receiving portion 18, a groove 19a that is long in the Z direction is formed. On the other hand, as shown in FIG. 5, the chair back guide portion 4a is provided with a protruding piece 19b protruding from the chair back guide portion 4a in the Y direction (right direction of the wheelchair 1). The protruding piece 19b is slidably engaged with the groove 19a of the armrest receiving portion 18. Similarly, a protruding piece is provided on the left side of the chair back guide portion 4a. In Embodiment 1, the slider operation | movement part 19 is comprised by the groove | channel 19a formed in the main body 18b of the armrest receiving part 18, and the protrusion piece 19b provided in the chair back guide part 4a.

  FIG. 8 is a diagram for explaining an operation in which the armrest receiving portion slides in the wheelchair according to the first embodiment. Specifically, FIG. 8A shows the positional relationship between the groove 19a of the armrest receiving portion 18 and the protruding piece 19b of the chair back guide portion 4a when the wheelchair 1 is in the chair posture, and FIG. 1 shows the positional relationship between the groove 19a of the armrest receiving portion 18 and the protruding piece 19b of the chair back guide portion 4a in the middle of the transformation from the chair posture to the flat posture, and FIG. 8 (c) shows when the wheelchair 1 is in the flat posture. The positional relationship between the groove 19a of the armrest receiving portion 18 and the protruding piece 19b of the chair back guide portion 4a is shown. In FIG. 8, the armrest 3 of the wheelchair 1 is omitted.

  As shown in FIG. 8, when the wheelchair 1 is deformed from the chair posture to the flat posture, the protruding piece 19 b is connected to the chair back in conjunction with the chair back guide portion 4 a falling to the rear side of the wheelchair 1 (reclining). While rotating around the connecting portion between the guide portion 4a and the chair waist bottom 2b, the armrest receiving portion 18 moves downward in the groove 19a long in the Z direction. Thereby, the armrest receiving part 18 is pulled to the rear side of the wheelchair 1 by the protrusion piece 19b latched in the groove | channel 19a. Since the armrest receiving portion 18 is slidable in the X direction by the slider 20 as described above, the armrest receiving portion 18 attached to the slider movable portion 20b is linked to the wheelchair 1 in conjunction with the fall of the chair back guide portion 4a. Slide backwards. Therefore, the armrest 3 supported by the armrest receiving portion 18 slides to the rear side of the wheelchair 1 in conjunction with the chair back guide portion 4 a falling to the rear side of the wheelchair 1.

  FIG. 9 is a right side view showing the wheelchair in the flat posture according to the first embodiment. However, in FIG. 9, the armrest 3 is indicated by a virtual line so that the inner structure of the armrest 3 can be seen. As shown in FIG. 9, when the chair back guide portion 4 a falls to the rear side of the wheelchair 1, the armrest 3 supported by the armrest receiving portion 18 slides to the rear side of the wheelchair 1. Therefore, according to the first embodiment, when the wheelchair 1 is deformed from the chair posture to the flat posture, the armrest 3 can widely protect the upper body not only from the occupant's waist but also from the occupant's shoulder to the waist. . Therefore, by sliding the armrest 3 as in the first embodiment, the possibility that the occupant rotates around the waist and falls from the head side is reduced, and the possibility that the occupant is seriously injured is reduced.

  The distance that the armrest receiving portion 18 slides can be adjusted by the position where the protruding piece 19b is provided on the chair back guide portion 4a, and is preferably set to a length that is slightly shorter than the general length from the waist to the heel of an adult male. To do. As a specific example, it is set to about 30 cm, for example.

  On the other hand, when the chair back guide portion 4a rises, the protruding pieces 19b are connected to the chair back guide portion 4a and the chair waist bottom 2b in the order shown in FIGS. 8C, 8B, and 8A. While turning around the connecting portion, the armrest receiving portion 18 moves upward in the groove 19a long in the Z direction. Thereby, the armrest receiving part 18 is pushed to the front side of the wheelchair 1 by the protrusion piece 19b latched in the groove | channel 19a. Therefore, when the wheelchair 1 is deformed from the flat posture to the chair posture, the armrest 3 supported by the armrest receiving portion 18 slides forward of the wheelchair 1 and moves to the position of the occupant's waist as shown in FIG. To do. Therefore, according to this Embodiment 1, when the wheelchair 1 deform | transforms from a flat attitude | position to a chair attitude | position, the armrest 3 becomes a handrail or an elbow rest which prevents a passenger | crew from falling to right and left. That is, when the wheelchair 1 is in the chair posture, the armrest 3 can be used in the same manner as a general wheelchair. When the wheelchair 1 is in the chair posture, it is preferable that the armrest 3 does not protrude from the rear part of the wheelchair 1.

  Conventionally, an armrest having a large width is required to prevent the occupant from falling from the side of the wheelchair when the wheelchair is in a flat posture. However, if a wide armrest is used, the wheelchair becomes large, and the handling of the wheelchair may be deteriorated. On the other hand, according to the wheelchair 1 of the first embodiment, the armrest 3 moves to the rear side of the wheelchair 1 in conjunction with the reclining of the chair back guide portion 4a (chair back bottom 2a). The width of the armrest is the width of the armrest of a typical wheelchair (that is, the armrest with the minimum width necessary to prevent the occupant from falling from the side of the wheelchair 1 when the wheelchair 1 is in the chair position) However, the possibility that the occupant falls from the head side when the wheelchair 1 is in the flat posture can be reduced. Therefore, according to the first embodiment, the wheelchair 1 that is compact, easy to use, and highly safe can be realized.

  Further, according to the first embodiment, the armrest 3 can be inserted and removed from the armrest receiving portion 18 regardless of the reclining of the chair back guide portion 4a (chair back bottom 2a). Transfer becomes easy.

  In addition, while inserting the insertion part 18a for fixing the armrest 3 to the armrest receiving part 18 in the inner surface of the main body 18b of the armrest receiving part 18, the protrusion provided in the chair back guide part 4a on the armrest 3 A long groove in the Z direction where the piece 19b is slidably locked may be formed. However, it is necessary to consider the arrangement positions of the slider 20 and the inserted portion 18a so that the inserted portion 18a of the armrest receiving portion 18 does not contact the slider 20.

  In addition, the armrest 3 (armrest receiving portion 18) is locked so as not to move back and forth independently regardless of the reclining of the chair back guide portion 4a (chair back bottom 2a), and the chair back guide portion 4a (chair back bottom 2a) A lock mechanism that allows the armrest 3 (armrest receiving portion 18) to slide only in conjunction with the operation may be provided in the slider movable portion 20b.

(Embodiment 2)
FIG. 10 is a right side view illustrating the chair posture wheelchair according to the second embodiment, and FIG. 11 is a right side view illustrating the flat posture wheelchair according to the second embodiment. However, in FIG. 10 and FIG. 11, the armrest 3 is indicated by a virtual line so that the structure inside the armrest 3 can be understood. In the following description, regarding the wheelchair 1 according to the second embodiment, a configuration different from the first embodiment will be described, and the description of the same configuration as the first embodiment will be omitted.

  The wheelchair 1 according to the second embodiment is different from the first embodiment in the configuration of the slider operation unit. In the second embodiment, the slider operation unit is configured by a link mechanism (armrest link mechanism) connected to the armrest receiving portion 18c. Therefore, the slide mechanism that slides the armrest receiving portion 18 includes the slider 20 and the armrest link mechanism. As in the first embodiment described above, the armrest mechanism is provided on both the left and right sides of the wheelchair 1, but the armrest mechanism provided on the left and right sides of the wheelchair 1 has the same configuration. Only one (right side) armrest mechanism will be described, and the other (left side) armrest mechanism will not be described.

  The armrest mechanism of the wheelchair 1 according to the second embodiment includes an armrest 3 disposed on a side portion of the wheelchair 1, an armrest receiving portion 18 c that can detachably support the armrest 3, and a side portion of the chair base portion 5. An armrest link for connecting the slider 20 that is fixed and slidably supports the armrest receiving portion 18c in a direction parallel to the surface of the chair waist bottom 2b (X direction), the chair leg first guide portion 4d, and the armrest receiving portion 18. And a mechanism. The armrest link mechanism is rotatably attached to a rod-like first link 22 having one end rotatably attached to a fixed point 21 on the chair leg first guide portion 4d and a fixed point 23 on the armrest receiving portion 18c. A rod-shaped second link 24 having one end, a bearing 25 that rotatably supports the other end of the first link 22 and the other end of the second link 24, and a guide rail that guides the movement of the bearing 25. 26.

  The armrest mechanism according to the second embodiment slides the armrest 3 in conjunction with the posture change of the chair bottom 2 of the wheelchair 1 including the chair back bottom 2a, as in the first embodiment. Specifically, in the armrest mechanism of the second embodiment, when the chair back bottom 2 a falls to the rear side of the wheelchair 1, the armrest 3 is slid to the rear side of the wheelchair 1, and the chair back bottom 2 a is the front of the wheelchair 1. When getting up to the side, the armrest 3 is slid to the front side of the wheelchair 1.

  In the second embodiment, the armrest receiving portion 18c is composed only of a member corresponding to the inserted portion 18a described in the first embodiment. Therefore, a long hole in the Z direction is formed in the armrest receiving portion 18c shown in FIGS. A rod-like insertion member (not shown) that is long in the Z direction is fixed to the lower end of the armrest 3. By inserting the insertion member of the armrest 3 into the armrest receiving portion 18c, the armrest 3 is fixed to the armrest receiving portion 18c. The armrest receiving portion 18c is fixed to a slider movable portion (not shown) of the slider 20 as in the first embodiment. The configuration of the slider 20 is the same as the configuration of the slider 20 described in the first embodiment. Note that the armrest receiving portion 18c and the slider movable portion shown in FIGS. 10 and 11 may be integrated.

  The chair leg first guide part 4d is in a suspended position when the chair back guide part 4a is in a raised position, and the chair back guide part 4a falls down at the lower end of the chair leg first guide part 4d at that time. The chair back guide portion 4a is lifted up in conjunction with the movement of the chair and descends in conjunction with the rising of the chair back guide portion 4a. In the armrest link mechanism of the second embodiment, the chairrest bottom 2a is slid to the rear side of the wheelchair 1 when the chairback bottom 2a falls down in conjunction with the movement of the chair leg first guide portion 4d. When the user gets up, the armrest 3 is slid forward of the wheelchair 1.

  The guide rail 26 is fixed to the chair base portion 5 or the slider fixing portion 20a, is long in the Z direction, and supports the bearing portion 25 so as to be movable in the Z direction. Therefore, the bearing portion 25 is movable along the longitudinal direction (Z direction) of the guide rail 26. The guide rail 26 is located between the armrest receiving portion 18c to which one end of the second link 24 is attached and the chair leg first guide portion 4d to which one end of the first link 22 is attached. The first link 22 extends obliquely upward from the bearing portion 25 toward the front side of the wheelchair 1 and is connected to a fixed point 21 on the chair leg first guide portion 4d. The second link 24 extends obliquely upward from the bearing portion 25 toward the rear side of the wheelchair 1 and is connected to a fixed point 23 on the armrest receiving portion 18c. The fixing point 21 on the chair leg first guide portion 4d is positioned below the connecting portion between the chair waist bottom 2b and the chair knee guide portion 4c.

  When the wheelchair 1 is deformed from the chair posture shown in FIG. 10 to the flat posture shown in FIG. 11, the chair back bottom 2 a (the chair back guide portion 4 a) falls to the rear side of the wheelchair 1 as described in the first embodiment. In conjunction with this, the chair leg first guide part 4d rotates upward about the connecting part between the chair knee guide part 4c and the chair leg first guide part 4d. At this time, the fixed point 21 on the chair leg first guide portion 4d rotates around the connecting portion between the chair knee guide portion 4c and the chair leg first guide portion 4d and moves upward. Thereby, the 1st link 22 pulls the bearing part 25, and the bearing part 25 moves to the upper direction along the guide rail 26 long in a Z direction. As a result, the second link 24 pushes the armrest receiving portion 18 c toward the rear side of the wheelchair 1. Since the armrest receiving portion 18c is slidable in the X direction by the slider 20, the armrest attached to the slider movable portion (not shown) in conjunction with the chair back guide portion 4a falling to the rear side of the wheelchair 1. The receiving portion 18 c slides to the rear side of the wheelchair 1. Therefore, the armrest 3 supported by the armrest receiving portion 18 c moves to the rear side of the wheelchair 1 in conjunction with the chair back guide portion 4 a falling to the rear side of the wheelchair 1.

  On the other hand, when the wheelchair 1 is deformed from the flat posture shown in FIG. 11 to the chair posture shown in FIG. 10, the chair leg bottom 2 a (the chair back guide portion 4 a) rises to the front side of the wheelchair 1, The first guide portion 4d is rotated downward about the connecting portion between the chair knee guide portion 4c and the chair leg first guide portion 4d, and is suspended obliquely downward. At this time, the fixed point 21 on the chair leg first guide portion 4d rotates around the connecting portion between the chair knee guide portion 4c and the chair leg first guide portion 4d and moves downward. Thereby, the 1st link 22 pushes the bearing part 25, and the bearing part 25 moves below along the guide rail 26 long in a Z direction. As a result, the second link 24 pulls the armrest receiving portion 18c to the front side of the wheelchair 1, and the armrest 3 supported by the armrest receiving portion 18c slides to the front side of the wheelchair 1.

  The distance that the armrest receiving portion 18c slides is the position where the armrest receiving portion 18c to which one end of the second link 24 is attached, the position where the guide rail 26 is provided, the length of the first link 22, and the length of the second link 24. For example, it is set to about 30 cm as in the first embodiment.

  In the second embodiment, the armrest receiving portion 18c and the chair leg first guide portion 4d are linked with the operation of the chair leg first guide portion 4d by the link mechanism (armrest link mechanism) for connecting the armrest receiving portion 18c and the chair leg first guide portion 4d. Although the part 18c was slid, the link which connects guide parts (the chair back guide part 4a, the chair knee guide part 4c, the chair leg 2nd guide part 4e) other than the chair leg 1st guide part 4d, and the armrest receiving part 18c The armrest receiving portion 18c may be slid by a mechanism (armrest link mechanism).

  Further, for example, by installing the guide rail 26 on the rear side of the wheelchair 1 with respect to the armrest receiving portion 18c to which one end of the second link 24 is attached, the sliding direction of the armrest 3 (armrest receiving portion 18c) is reversed. Can do. That is, the armrest 3 (armrest receiving portion 18c) is moved to the front side (occupant's foot side) of the wheelchair 1 in conjunction with the chair back guide portion 4a falling to the rear side of the wheelchair 1, and the chair back guide portion 4a. Can be moved to the rear side of the wheelchair 1 (the back side of the occupant) in conjunction with rising up to the front side of the wheelchair 1. Of course, a guide rail other than the chair leg first guide part 4d is also provided by a link mechanism that connects the guide part (the chair back guide part 4a, the chair knee guide part 4c, the chair leg second guide part 4e) and the armrest receiving part 18c. The sliding direction of the armrest 3 (armrest receiving portion 18c) can be reversed by changing the arrangement of the bearing 26 and the bearing portion 25 or the like. Alternatively, the first link 22 and the second link 24 are turned upside down, and the bearing is positioned above the fixed point 21 where one end of the first link 22 is locked and the fixed point 23 where one end of the second link 24 is locked. Even if the portion 25 is positioned, the sliding direction of the armrest 3 (armrest receiving portion 18c) can be reversed.

  By reversing the sliding direction of the armrest 3 (armrest receiving portion 18c), as the chair back guide portion 4a falls down, a space for opening the chair back bottom 2a and the chair waist bottom 2b in the left-right direction of the wheelchair 1 is expanded. The wheelchair can be easily used even by a passenger who is difficult to use the wheelchair due to the armrest being obstructed due to shrinkage or the like. Moreover, as the posture of the chair back bottom 2a (chair spine guide portion 4a) approaches a flat posture, the space for opening the upper body of the occupant in the left-right direction of the wheelchair 1 increases, so the work space for the assistant increases, This makes it easier to care for passengers.

(Embodiment 3)
FIG. 12 is a right side view showing the chair posture wheelchair in the third embodiment, and FIG. 13 is a right side view showing the flat posture wheelchair in the third embodiment. In the following description, the wheelchair 1 according to the third embodiment will be described with a configuration different from the first and second embodiments described above, and the description of the same configuration as the first and second embodiments will be omitted.

  In the wheelchair 1 according to the third embodiment, the configuration of the armrest 3 is different from that of the second embodiment described above, and the configurations of the slider 20 and the armrest link mechanism (slider operating portion) are the same as those of the second embodiment described above. As in the first and second embodiments described above, the armrest mechanisms are provided on both the left and right sides of the wheelchair 1, but the armrest mechanisms provided on the left and right sides of the wheelchair 1 have the same configuration, so the following description will be given. Then, only one (right side) armrest mechanism will be described, and description of the other (left side) armrest mechanism will be omitted.

  In the wheelchair 1 of this Embodiment 3, the armrest 3 is comprised so that expansion-contraction is possible in the width direction. The armrest mechanism according to the third embodiment extends the armrest 3 to the rear side of the wheelchair 1 in conjunction with the chair back bottom 2a (chair back guide portion 4a) falling to the rear side of the wheelchair 1. The armrest 3 is shortened to the chair waist bottom 2 side in conjunction with 2a (the chair back guide part 4a) getting up to the front side of the wheelchair 1.

  As shown in FIGS. 12 and 13, the armrest 3 according to the third embodiment includes a fixed armrest 3 b and a rear-side movable armrest 3 a disposed on the rear side of the wheelchair 1 with respect to the fixed armrest 3 b. The rear side movable armrest 3a is engaged with the fixed armrest 3b.

  As an example of the configuration of the armrest 3, FIGS. 12 and 13 show that the rear movable armrest 3a has six parallel rod-shaped portions 31 that protrude toward the fixed armrest 3b (toward the front side of the wheelchair 1). The fixed armrest 3b includes six parallel rod-shaped portions 32 that protrude toward the rear-side movable armrest 3a (toward the rear side of the wheelchair 1) corresponding to the rod-shaped portions 31 of the rear-side movable armrest 3a. It shows what it has. 12 and 13 show the armrest 3 arranged on the side of the wheelchair 1 so that the rod-shaped portion 31 and the rod-shaped portion 32 are parallel to each other. 12 and 13 is formed with a hole portion into which the rod-like portion 31 of the rear movable armrest 3a is partially slidably inserted. The hole 32 of the fixed armrest 3b shown in FIGS. The rod-shaped portion 31 is slidably inserted (inserted) into the rod-shaped portion 32 of the fixed armrest 3b. Therefore, the rod-shaped portion 32 of the fixed armrest 3b is a hollow pole having a larger cross-sectional area (diameter) than the rod-shaped portion 31 of the rear side movable armrest 3a. Note that the rod-shaped portion 31 of the rear movable armrest 3a may slide within the rod-shaped portion 32 of the fixed armrest 3b. The cross-sectional shape of the rod-shaped portion 32 of the fixed armrest 3b is not particularly limited, and may be any shape such as a circular shape, an elliptical shape, a semicircular shape, and a rectangular shape.

  As shown in FIGS. 12 and 13, the armrest mechanism of the wheelchair 1 according to the third embodiment includes a rear movable armrest 3 a and a fixed armrest 3 b, an armrest 3 disposed on the side of the wheelchair 1, and a rear side The armrest receiving portion 18 which is composed of a movable receiving portion 18d and a fixed receiving portion 18e and can removably support the armrest 3, a slider 20 which supports the rear side movable receiving portion 18d so as to be slidable in the X direction, and a first chair leg. The arm rest link mechanism (rear side movable arm rest link mechanism) which connects the guide part 4d and the rear side movable receiving part 18d is comprised. The armrest link mechanism is rotatable to a rod-shaped first link 22 having one end rotatably attached to a fixed point 21 on the chair leg first guide portion 4d and to a fixed point 23 on the rear side movable receiving portion 18d. A rod-shaped second link 24 having one end attached to the shaft, a bearing portion 25 rotatably supporting the other end of the first link 22 and the other end of the second link 24, and guiding the movement of the bearing portion 25. And a guide rail 26.

  In the armrest mechanism of the third embodiment, the rear side movable armrest 3a is slid in a direction (X direction) parallel to the surface of the chair waist bottom 2b. Specifically, the armrest mechanism of the third embodiment is movable backward when the chair back bottom 2a falls to the rear side of the wheelchair 1 in conjunction with the posture change of the chair bottom 2 of the wheelchair 1 including the chair back bottom 2a. When the armrest 3a is slid to the rear side of the wheelchair 1 and the chair back bottom 2a is raised to the front side of the wheelchair 1, the rear side movable armrest 3a is slid to the front side of the wheelchair 1.

  The rear side movable receiving portion 18d is fixed to a slider movable portion (not shown) of the slider 20 as in the second embodiment. On the other hand, the fixed receiving portion 18e is fixed to the side portion of the chair base portion 5 or the slider fixing portion 20a. A rear side movable receiving portion 18d fixed to a slider movable portion (not shown) detachably supports the rear side movable armrest 3a so that the rod-like portion 31 of the rear side movable armrest 3a is preferably horizontal. The fixed receiving portion 18e preferably supports the fixed armrest 3b in a detachable manner so that the rod-shaped portion 32 of the fixed armrest 3b is horizontal.

  The rear side movable receiving portion 18d and the fixed receiving portion 18e are made of a member corresponding to the inserted portion 18a described in the first embodiment. Therefore, a hole that is long in the Z direction is formed in the rear side movable receiving portion 18d and the fixed receiving portion 18e. A rod-shaped insertion member (not shown) long in the Z direction is fixed to the lower end of the rear side movable armrest 3a. By inserting the insertion member of the rear movable armrest 3a into the rear movable receiver 18d, the rear movable armrest 3a is fixed to the rear movable receiver 18d. A rod-like insertion member (not shown) that is long in the Z direction is also fixed to the lower end of the fixed armrest 3b. By inserting the insertion member of the fixed armrest 3b into the fixed receiving portion 18e, the fixed armrest 3b is fixed to the fixed receiving portion 18e.

  When the wheelchair 1 is deformed from the chair posture shown in FIG. 12 to the flat posture shown in FIG. 13, the rear movable receiver attached to the slider movable portion (not shown) in conjunction with the chair back guide portion 4a falling down. The part 18d slides to the rear side of the wheelchair 1. Therefore, the rear side movable armrest 3a supported by the rear side movable receiving portion 18d moves to the rear side of the wheelchair 1 in conjunction with the chair back guide portion 4a falling to the rear side of the wheelchair 1. Thereby, the armrest 3 extends to the rear side of the wheelchair 1. In addition, even if the chair back guide part 4a falls down and the rear side movable armrest 3a slides, the armrest 3 is fixed armrest without the rod-shaped part 31 of the rear side movable armrest 3a coming out of the bar-shaped part 32 of the fixed armrest 3b. It is comprised so that it may connect with the rod-shaped part 32 of 3b.

  On the other hand, when the wheelchair 1 is deformed from the flat posture shown in FIG. 13 to the chair posture shown in FIG. 12, the rear side attached to the slider movable portion (not shown) in conjunction with the chair back guide portion 4a rising up. The movable receiving portion 18d slides to the front side of the wheelchair 1. Therefore, the rear side movable armrest 3a supported by the rear side movable receiving portion 18d moves to the front side of the wheelchair 1 in conjunction with the chair back guide portion 4a getting up to the front side of the wheelchair 1. Thereby, the width | variety of the armrest 3 shrinks.

  The distance by which the rear movable receiving portion 18d slides is the position at which the rear movable receiving portion 18d to which one end of the second link 24 is attached, the position at which the guide rail 26 is provided, the length of the first link 22, the second link It can be adjusted by the length of 24 or the like.

  For example, the guide rail 26 may be installed on the rear side of the wheelchair 1 with respect to the rear side movable receiving portion 18d to which one end of the second link 24 is attached, and the sliding direction of the rear side movable armrest 3a may be reversed. .

  Further, instead of sliding the rear movable armrest 3a by the rear movable armrest link mechanism, the slider operating unit 19 described in the first embodiment may be employed.

  Further, for example, when both the rear movable armrest 3a and the fixed armrest 3b have a plurality of rod-shaped portions, the rear movable armrest 3a having the plurality of rod-shaped portions 31 and the fixed armrest 3b having the plurality of rod-shaped portions 32. As a frame, a cover member such as a mesh member or a plate member may be provided on the side surface of the armrest 3. In this case, a cover member may be individually provided on each side surface of the rear movable armrest 3a and the fixed armrest 3b, or a stretchable material is used as a material constituting the cover member so as to be integrated with the entire side surface of the armrest 3. A cover member may be provided.

  An example of a wheelchair in which a mesh-like member is stretched as a cover member on the side surface of the armrest 3 is shown in FIGS. 14 and 15. FIG. 14 is a right side view showing another example of the chair posture wheelchair according to the third embodiment, and FIG. 15 is a right side view showing another example of the flat posture wheelchair according to the third embodiment. In the example shown in FIGS. 14 and 15, both the rear movable armrest 3a and the fixed armrest 3b are U-shaped. Therefore, the armrest 3 is a ring type that can be expanded and contracted, the rear movable armrest 3 a includes two rod-shaped portions 31, and the fixed armrest 3 b includes two rod-shaped portions 32.

  In the wheelchair 1 shown in FIGS. 14 and 15, the rear side movable armrest 3 a is arranged inside the wheelchair 1 with respect to the fixed armrest 3 b. Therefore, the outer surface of the rod-shaped portion 31 of the rear movable armrest 3a slides with the inner surface of the rod-shaped portion 32 of the fixed armrest 3b. In this case, the mesh member 33 is fixed to the inner surface of the rear movable armrest 3a and the outer surface of the fixed armrest 3b, respectively.

  As described above, the armrest mechanism in which the movable armrest 3a is disposed only on the rear side of the wheelchair 1 with respect to the fixed armrest 3b has been described. However, the movable armrest is disposed on both sides in the front-rear direction of the wheelchair 1 with the fixed armrest 3b interposed therebetween. You may slide the front side movable armrest arrange | positioned in the front side of the wheelchair 1 rather than the armrest 3b in the reverse direction to the back side movable armrest 3a. In this case, a link mechanism (front side movable armrest link mechanism) that slides the front side movable armrest in the direction opposite to the rear side movable armrest 3a (rear side movable receiving portion 18d) is required. Since the configuration for reversing the sliding direction of the rear side movable receiving portion 18d has already been described, a detailed description of the front side movable armrest link mechanism is omitted.

  The armrest mechanism and wheelchair for a wheelchair according to the present invention have high safety and are useful as a wheelchair for nursing care.

DESCRIPTION OF SYMBOLS 1 Wheelchair 2 Chair bottom 2a Chair back bottom 2b Chair waist bottom 2c Chair knee bottom 2d Chair leg 1st bottom 2e Chair leg 2nd bottom 3 Armrest 3a Back side movable armrest 3b Fixed armrest 4 Chair guide part 4a Chair back guide part 4c Chair Knee guide part 4d Chair leg first guide part 4e Chair leg second guide part 5 Chair base part 6 Running wheel 7 First link part 8 Second link part 9 Foot link interlocking link 10 First arm member 10a Branching part 11 Cam Part 12 First connecting member 13 Cam part rotating shaft 14 Groove part 15 Guide shaft 16 Second arm member 17 Second connecting member 18, 18c Armrest receiving part 18a Inserted part 18b Main body 18d Rear side movable receiving part 18e Fixed receiving part 19 Slider operating part 19a Groove 19b Projecting piece 20 Slider 20a Slider fixing part 0b slider movable portion 21 and 23 fixed point 22 first link 24 second link 25 bearing portion 26 guide rail 31, 32 bar-like portion 33 mesh member

Claims (7)

An armrest mechanism for a wheelchair installed in a wheelchair,
An armrest disposed on a side of the wheelchair;
An armrest receiving part for supporting the armrest;
A slide mechanism for sliding the armrest receiving portion;
With
The slide mechanism is
When the chair back guide part of the wheelchair falls to the rear side, the armrest receiving part slides to the rear side of the wheelchair in conjunction with the chair back guide part falling down,
When the chair back guide part rises to the front side of the wheelchair, the armrest receiving part is slid to the front side of the wheelchair in conjunction with the chair back guide part rising.
Armrest mechanism for wheelchairs. The slide mechanism is
A protruding piece provided in the chair back guide part and protruding from the chair back guide part;
A groove formed in the armrest receiving part or the armrest and in which the protruding piece is slidably locked;
Comprising
The armrest mechanism for wheelchairs of Claim 1. The slide mechanism includes an armrest link mechanism coupled to the armrest receiver.
The armrest mechanism for wheelchairs of Claim 1. The armrest link mechanism connects the armrest receiving part and the chair leg guide part of the wheelchair,
The armrest mechanism for wheelchairs of Claim 3. The slide distance of the armrest receiving part by the slide mechanism is about 30 cm,
The armrest mechanism for wheelchairs of any one of Claims 1-4. The armrest receiving part is composed of a fixed receiving part and a rear side movable receiving part arranged on the rear side of the wheelchair from the fixed receiving part,
The armrest is composed of a fixed armrest supported by the fixed receiving portion and a rear movable armrest supported by the rear movable receiving portion,
The armrest expands and contracts by sliding of the rear side movable receiving portion by the slide mechanism,
The armrest mechanism for wheelchairs of any one of Claims 1-5. A wheelchair provided with the armrest mechanism for a wheelchair according to any one of claims 1 to 6.

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