WO2019106926A1

WO2019106926A1 - Electric wheelchair

Info

Publication number: WO2019106926A1
Application number: PCT/JP2018/035494
Authority: WO
Inventors: 伊藤　淳; 晃二宇野
Original assignee: 本田技研工業株式会社
Priority date: 2017-11-28
Filing date: 2018-09-25
Publication date: 2019-06-06
Also published as: JP6924680B2; JP2019097601A

Abstract

Provided is an electric wheelchair which can be disassembled and assembled, with which units thereof can be disassembled in a compact manner with few operations, and with which units thereof after disassembly can be easily handled. An electric wheelchair 1 comprises: a travel unit 10 having a flat vehicle body frame 12, at least three wheels (front wheels 14, rear wheels 16) that are supported by the vehicle body frame 12, and an electric motor 18 for driving the wheels; an electrical unit 30 having electrical components including at least a battery 34, a first coupling unit (front-side engagement pipe 90a, rear section latch 96) that is detachably coupled to the vehicle body frame 12, and a seat support part 122; and a riding unit 40 having a seat 42 serving as a riding seat, and a second coupling unit (seat-side engagement pipe 142, engagement member 144) that is provided to a bottom part of the seat 42 and that is detachably coupled to the seat support part 122. The electric wheelchair 1 can be in an assembled state in which the travel unit 10, the electrical unit 30, and the riding unit 40 are coupled to each other, and a disassembled state in which these units are separated from each other.

Description

Electric wheelchair

The present disclosure relates to a powered wheelchair that can be split and assembled.

As an electric vehicle such as an electric three-wheeled vehicle, one that can be divided and assembled so as to be easily loaded on a passenger car or the like when transported to a distant destination by a passenger car or the like is known (Patent Document 1). In this electric three-wheeled vehicle, the vehicle body frame is configured to be split and assembled by a front frame provided with front wheels and a rear frame provided with rear wheels. On the front frame, a steering shaft connected to the front wheels and a seat post pipe for attaching a seat are erected, and a battery is detachably mounted. The seat is detachably provided above the battery, and the steering shaft is adapted to be folded rearward. As described above, the electric tricycle is divided into four parts, that is, the battery, the seat, the front frame, and the rear frame, and the folding of the steering shaft reduces the weight of each divided unit and makes it easy to handle.

In addition, in a small electric vehicle in which the vehicle main body can be divided into a pair of components between the front and rear wheels in order to facilitate transportation and storage, in order to reduce the number of steps of disassembly work, the pair of configurations It is known to have a lock means for holding the body in a connected state, and a stand which is turned along with the connection release operation of the lock means, thereby becoming a standing posture for restricting the tilting of the structure from the lying position. (Patent Document 2). In this small-sized motorized vehicle, when the user performs the connection release operation, the stand is placed in the upright posture, and it is not necessary to perform the rotation operation of the stand first.

In addition, there is known an electric wheelchair which can be assembled and divided by an upper structure and a lower structure (Patent Document 3). In this electric wheelchair, the upper structure includes a seat, a backrest, a seat rail, a cross member, and a sub frame, and electrical components (a motor, a battery, a control device, etc.) are accommodated in a storage chamber formed at the bottom of the seat. The lower structure includes left and right main frames, front wheels, drive wheels, hand rims, sub frames and the like. By providing the electrical components in the upper structure, the weight of the upper structure and the weight of the lower structure become equal to each other, and the handling thereof becomes easy.

JP-A-6-78955 JP, 2001-29398, A Japanese Patent Application Laid-Open No. 10-85269

However, although the invention described in Patent Document 1 is devised to facilitate the work of disassembly and assembly, each unit becomes compact after division because a folding operation is necessary after disassembly or it can not be folded. It does not. Specifically, while the steering shaft needs to be folded for compactness, the seat post pipe can not be folded, so the portion does not become compact. Further, in the inventions described in Patent Document 2 and Patent Document 3, the weight of the unit after division is large because it is only divided into two, and handling after disassembly is complicated. Furthermore, in these inventions, since the device for handling and carrying (moving) after division is not made easy, handling of each divided unit and carrying are also complicated when loading on a passenger car etc. It is.

An object of the present invention is, in view of such background, to provide an electric wheelchair capable of dividing each unit compactly with a small number of operations that can be divided and assembled, and easy handling of each unit after division.

In order to solve such problems, an embodiment of the present invention is an electric wheelchair (1), which includes a flat body frame (12) and at least three wheels supported by the body frame (12) 14, 16), a traveling part (10) having a motor (18) for driving a wheel, an electrical component including at least a battery (34), a first coupling part detachably coupled to the vehicle body frame (12) 90a, 96), an electric part (30) having a seat support part (122), a seat (42) forming a passenger seat, and a bottom part of the seat (42), the seat support part (122) And an riding portion (40) having a second coupling portion (142, 144) detachably coupled, wherein the traveling portion (10), the electric component (30) and the riding portion (40) are mutually connected. State, Can take a divided state these are separated from each other.

According to this configuration, the electrical component unit has the first joint component and the seat support component, and the carrying component unit is removed from the electrical component unit and the electrical component unit is removed from the traveling component in order to connect the traveling component and the riding component. The electric wheelchair can be divided into three units. Since the traveling part has a flat body frame, it becomes compact without requiring a folding operation when the electric part is removed. In addition, since the electric wheelchair is divided into three units, and the electric unit connecting the boarding unit to the traveling unit has an electric component including at least a heavy battery, the variation in weight of the three units is suppressed. Ru. This facilitates handling of each unit after division.

In the above-mentioned configuration, the electric component unit (30) connects the sheet support part (122) to the first coupling part (90a, 96) such that the height adjustment mechanism (38) can adjust the height, and It is preferable to further include at least one of a rotation mechanism (116) that rotatably connects the sheet support portion (122) with respect to the first coupling portion (90a, 96) as viewed.

According to this configuration, it is possible to enable at least one of height adjustment and rotation of the riding portion relative to the traveling portion without increasing the weight of the riding portion. By at least one of height adjustment and rotation with respect to the traveling part of the boarding part being enabled, it is possible to expand the application according to the user's physique and usage conditions and to facilitate the getting on and off.

In the above configuration, preferably, the electrical component unit (30) has a first grip that is tapered upward at an upper portion in a state where the electrical component unit (30) is assembled to the traveling unit (10). The second joint (142, 144) is formed with a recess (138) which opens downward in the assembled state and receives the first grip (134). .

According to this configuration, by providing the first holding unit, the electrical component unit can be easily attached to and detached from the traveling unit of the electrical component unit. In addition, by forming the concave portion of the opening downward to receive the first gripping portion at the second coupling portion of the riding portion, the first gripping portion has a tapered shape toward the upper side, so that the riding portion can be provided as an electrical component. At the time of attachment, the recess is guided by the first gripping portion, and the riding portion is disposed at the predetermined coupling position. Thus, the operation of connecting the second connecting portion provided at the bottom of the loading portion to the seat supporting portion can be easily performed.

In the above configuration, preferably, the traveling unit (10) is in an inclined posture in which the two wheels (16) are grounded and the at least one wheel (14) is floated by being held by the user in the divided state. And a second gripping portion (84) for bringing the traveling portion (10) into question.

According to this configuration, the user can grip the second grip portion, can transport the traveling portion in an inclined posture in which the two wheels are grounded, and handling becomes easy.

In the above configuration, preferably, the traveling unit (10) is a fall prevention member (60 for preventing the electric wheelchair (1) from overturning by grounding when the electric wheelchair (1) is tilted rearward in the assembled state). In which the traveling portion (10) is the two wheels (16) in the divided state, and the fall prevention member (60) is the fall prevention position for preventing the fall of the electric wheelchair (1). Is configured to be movable so as to take a stand position different from the overturn preventing position and to ground so as to hold a standing posture standing up in a grounded state.

According to this configuration, the traveling portion can be held in the standing posture by displacing the overturn preventing member from the overturn preventing position to the stand position. Thereby, the occupied area of the traveling part at the time of non-use can be made small, and the traveling part can be stored in a narrow space.

In the above configuration, preferably, the traveling unit (10) includes at least one omnidirectional moving wheel (14).

According to this configuration, there is no need to provide a steering wheel and a steering mechanism for steering the steered wheels in the traveling unit, so that the traveling unit can be made compact.

In the above configuration, preferably, the seat (42) is a seat cushion (46) supported by the electric part (30) and a seat back (48) provided foldably with respect to the seat cushion (46). And the boarding portion (40) further includes a third grip portion (54) disposed at the periphery in a state where the seat back (48) is folded.

According to this configuration, the passenger compartment in a state where the seat back is folded is gripped with both hands by the third gripping part and the opposite part thereof, and is attached to and detached from the electric part, or the third gripping part is gripped It becomes possible to carry it by suspending it and handle the boarding part easier.

In the above configuration, preferably, the boarding portion (40) is held in the upright posture in which the sheeting portion (40) is in the vertical position, with the seat back (48) folded. And the third gripping portion (54), with the seat back (48) folded, with the standing stand (168) in the riding portion (40). It is provided on the opposite side.

According to this configuration, the standing stand can hold the riding portion in a state in which the seatback is folded in the standing posture in which the third grip portion is up. This makes it possible to reduce the occupied area of the boarding portion when not in use, in which the electric wheelchair is divided and stored in a storage place or the like, and the boarding portion can be stored in a narrow space. In addition, the user can easily perform an operation of lifting the boarding portion in the standing posture and an operation of arranging the boarding portion being lifted in the standing posture.

In the above configuration, preferably, the riding portion (40) is foldably provided on an armrest (44) foldably provided relative to the seat cushion (46) and the armrest (44), and the driving wheel And an operation unit (56) for operating the

According to this configuration, the mounting portion can be provided with the armrest and the operation portion that are compactly stored in the folded state.

In the above configuration, preferably, the riding portion (40) further includes an inclination mechanism (150) for inclining the seat surface (42a) of the seat (42) forward in the assembled state.

According to this configuration, by tilting the seat forward by the tilting mechanism, it is possible to facilitate the operation of standing up from the posture of sitting on the seat.

As described above, according to the present invention, it is possible to provide an electric wheelchair that can be divided and assembled, can be divided into compact units with less operation, and can easily handle the divided units.

The perspective view of the electric wheelchair which concerns on embodiment Rear view of electric wheelchair An exploded perspective view of the electric wheelchair Main part perspective view of the traveling part in the disassembled state The principal part perspective view of the run part in the state where the fall prevention bar was moved to the stand position Perspective view of the traveling unit in the standing posture Perspective view of the electrical part The perspective view of the front side connection part of a run part and an electrical equipment part A perspective view of the rear side coupling portion of the traveling unit and the electrical component unit Schematic cross-sectional view shown along line XX in FIG. 7 Principal part sectional view shown along line XX in FIG. 7 Bottom view of the boarding section Sectional view shown along line XIII-XIII in FIG. 2 Main part perspective view of the seat in a state where the seat is inclined Perspective view of the boarding part during folding A perspective view of the folded riding section in the standing position

Hereinafter, an embodiment of the electric wheelchair 1 of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of the electric wheelchair 1 according to the embodiment, and FIG. 2 is a rear view of the electric wheelchair 1. As shown in FIGS. 1 and 2, the electric wheelchair 1 has a traveling portion 10 having a flat, substantially rectangular body frame 12 and left and right front wheels 14 and left and right rear wheels 16 supported by the body frame 12. It is a four wheel wheelchair equipped. The sizes (outside diameters) of the front wheel 14 and the rear wheel 16 are approximately the same, whereby the flat body frame 12 extends substantially parallel to the ground.

The left and right electric motors 18 for driving the wheels disposed on the inner side in the vehicle width direction are directly connected to the left and right rear wheels 16. The left and right electric motors 18 are coaxially disposed in a posture in which the rotation axis extends in the left-right direction, and are supported by the left and right rear wheel brackets 20 attached to the vehicle body frame 12.

The left and right front wheels 14 are rotatably supported around an axle extending in the left-right direction by the left and right front wheel brackets 22 attached to the vehicle body frame 12. Each front wheel 14 is provided with a rotating member 24 attached to the vehicle body so as to be rotatable about an axle by a front wheel bracket 22, and a plurality of freewheels rotatably provided about an axis of rotation extending tangentially on the outer peripheral portion of the rotating member 24. It is an omni wheel provided with a roller 26. The front wheel 14 moves on the floor surface in a direction perpendicular to the axle by rotation of the rotating member 24 and moves on the floor surface in the direction of the axle by rotation of the free roller 26. That is, the front wheel 14 is an omnidirectional wheel capable of moving on the floor surface in all directions in accordance with the ratio of the amount of movement by both rotations.

The left and right electric motors 18 rotationally drive the left and right rear wheels 16 in the same direction at the same speed, whereby the traveling unit 10 goes straight and the left and right electric motors 18 rotate the left and right rear wheels 16 in the same direction at different speeds. By driving, the traveling unit 10 turns. In addition, when the left and right electric motors 18 rotationally drive the left and right rear wheels 16 in the reverse direction, the traveling unit 10 rotates (rotationally). As described above, since the traveling unit 10 includes the omnidirectionally moving wheels, it is not necessary to include a steering wheel and a steering mechanism for steering the steered wheels, and the traveling unit 10 can be configured compactly.

At the rear of the vehicle body frame 12, there is provided an electrical unit 30 having a substantially rectangular parallelepiped casing 32, electrical components such as a battery 34 and an electronic control unit 36 accommodated in the casing 32, and a seat post 38. There is.

On the electrical component unit 30, there is provided a boarding unit 40 including a seat 42 serving as a passenger seat and left and right armrests 44 integrally attached to the seat 42. The seat 42 includes a seat cushion 46 and a seat back 48 provided foldably with respect to the seat cushion 46. The seat cushion 46 includes a highly rigid seat frame 50 provided at the lower part, and a cushion portion 52 provided on the seat frame 50 so as to be tiltable and forming a seat surface 42 a of the seat 42. A sheet gripping portion 54 extending in the left-right direction is provided on the front surface of the seat frame 50. At the front end of the right arm armrest 44, an operation box 56 which is an operation unit for operating the rear wheel 16 which is a driving wheel is provided. The operation box 56 includes a joystick 56 a extending upward. At the front end of the armrest 44 for the left arm, a driving grip 58 extending upward instead of the operation box 56 is provided.

As shown in the exploded perspective view of FIG. 3, the electric wheelchair 1 is configured to be able to be divided into three divided units separated from each other by the traveling unit 10, the electrical unit 30 and the boarding unit 40. And electric wheelchair 1 will be in the assembling state shown in Drawing 1 by connecting these three units mutually. Details of the connection structure of each unit will be described later.

FIG. 4 is a perspective view of an essential part of the traveling unit 10 in the disassembled state. As shown in FIGS. 2 and 4, at the rear of the vehicle body frame 12, a fall prevention member 60 for preventing a fall to the rear of the electric wheelchair 1 is provided. The overturn preventing member 60 is supported by left and right arms 62 extending rearward from the vehicle body frame 12, a proximal shaft 64 connecting front ends of the left and right arms 62, and free ends of the left and right arms 62. , And left and right rollers 68 rotatably provided at both left and right ends of the free end side shaft 66. The left and right rollers 68 are disposed at a position higher than the contact portion of the rear wheel 16 when the electric wheelchair 1 is in the travelable state with four wheels (14, 16) grounded, and the electric wheelchair 1 has the front wheel 14 Contact the ground when tilting backwards to float.

As shown in FIG. 4, on the upper surface of the vehicle body frame 12, an electrical part support structure 70 is provided to support the electrical part 30. The electrical part supporting structure 70 includes left and right locking members 72 provided on the front side, and left and right strikers 74 provided on the rear side. Each locking member 72 is fixed to the vehicle body frame 12, extends upward, and extends rearward at the top. Each striker 74 is a support bar fixed to the vehicle body frame 12 so as to extend in the front-rear direction above the vehicle body frame 12.

A through hole 12a is formed in a portion of the upper surface of the vehicle body frame 12 on which the electrical component unit 30 is mounted, and a vehicle body for electrically connecting with the electrical component unit 30 on both left and right sides of the through hole 12a. A side connector 76 is provided. A positioning member 78 for determining the position of the electrical unit 30 is provided on the left side of the portion of the upper surface of the vehicle body frame 12 on which the electrical unit 30 is mounted.

Left and right holding brackets 80 for rotatably holding the base end side shaft 64 of the overturn preventing member 60 are fixed to the upper surface rear portion of the vehicle body frame 12. Each holding bracket 80 is provided movably in the left-right direction, and is provided with an operation knob 82 for fixing the rotational position of the corresponding arm 62. The operation knob 82 is biased toward the corresponding arm 62, and pivots the arm 62 by engaging one of a plurality of engagement holes 62a (FIG. 5) formed in the corresponding arm 62. regulate. When the operation knob 82 is operated and disengaged from the engagement hole 62 a, the overturn preventing member 60 becomes movable around the proximal shaft 64.

The engagement hole 62a is a position where the operation knob 82 engages when the overturn preventing member 60 is in the position shown in FIG. 4 (ie, the overturn preventing position for preventing overturning of the electric wheelchair 1); As shown, the overturn preventing member 60 is formed at a position where the operation knob 82 engages when the roller 68 on the free end side is lifted up from the overturn preventing position. In the state where the overturn preventing member 60 has flipped up the roller 68, as shown in FIG. 6, the traveling portion 10 can stand by four points of support of the left and right rear wheels 16 and the left and right rollers 68. In other words, the overturn preventing member 60 takes the above-mentioned overturn preventing position and the stand position at which the traveling portion 10 in the division state is in contact with the stand so as to hold the standing posture in which the two rear wheels 16 stand. It is provided to earn. As described above, by displacing the overturn preventing member 60 from the overturn preventing position to the stand position, the traveling unit 10 can be held in the upright posture. As a result, the occupied area of the traveling unit 10 when not in use becomes smaller, and the traveling unit 10 can be stored in a narrow space.

At the front end of the vehicle body frame 12, that is, at the upper end of the vehicle body frame 12 when the traveling unit 10 is in the upright posture, a frame gripping unit 84 to be gripped by a user is formed. The frame grip portion 84 is integrally formed with the vehicle body frame 12 in the form of a grip by a through slot formed in the vehicle body frame 12. The user grips the frame grip portion 84 and turns the vehicle body frame 12 forward (in the standing posture, in the direction in which the bottom surface of the vehicle body frame 12 faces) so that only the rear wheel 16 is in contact with the ground. It can be transported in a traveling manner. That is, the frame gripping portion 84 brings the two rear wheels 16 into contact with the ground and brings the two front wheels 14 into the inclined posture in the traveling portion 10 by being gripped by the user. Thereby, the handling of the traveling unit 10 is facilitated.

Left and right side grips 86 are also formed on the left and right side edge portions of the vertical middle portion of the vehicle body frame 12 in the standing posture (position corresponding to the longitudinal position of the center of gravity in the traveling posture). . As a result, when loading and unloading the traveling unit 10 with respect to a transport vehicle such as a car, the user can easily hold and hold the side grip 86 with both hands. Further, a rear holding portion 88 (FIG. 5) is also formed at the rear end (the lower end in the standing posture) of the vehicle body frame 12 in the traveling posture.

FIG. 7 is a perspective view of the electrical component unit 30, and FIG. 8 is a perspective view of the front joint of the traveling unit 10 and the electrical component unit 30. As shown in FIG. As shown in FIGS. 7 and 8, the housing 32 of the electrical component unit 30 has a frame 90 provided along the substantially rectangular parallelepiped side and a cover 92 provided outside the frame 90. . In FIG. 8, the cover 92 is shown by an imaginary line. The frame 90 is formed by welding together a square pipe made of steel having a rectangular cross section and a round pipe made of steel having a circular cross section. The frame 90 is provided with a front engagement pipe 90a which is a round pipe which extends left and right at the lower front edge and engages with the left and right locking members 72 by sliding from the rear.

FIG. 9 is a perspective view of the rear side coupling portion between the traveling portion 10 and the electrical component portion 30. FIG. In FIG. 9, the cover 92 is omitted, and the inside of the electrical component unit 30 is shown as seen through. At the rear of the housing 32 of the electrical unit 30, a rear coupling structure 94 for detachably coupling the electrical unit 30 to the vehicle body frame 12 in cooperation with the front engagement pipe 90a is integrally provided. The rear joint structure 94 is provided at a position corresponding to the left and right strikers 74 in a state where the front engagement pipe 90a is engaged with the left and right locking members 72, and the left and right rears detachably engage with the corresponding striker 74. A latch 96 is provided. Each rear latch 96 is rotatably provided between an engagement position engaging with the striker 74 and a release position not engaging with the striker 74, and is biased toward the engagement position. The housing 32 is provided with an operation handle 98 for vertically moving the left and right rear latches 96 from the engaged position to the released position. The operating handle 98 is connected to the left and right rear latches 96 by the wire 100, and when operated upward, causes the rear latch 96 to pivot from the engaged position to the released position.

The front engagement pipe 90 a and the rear latch 96 constitute a first coupling portion detachably coupled to the vehicle body frame 12.

An electrical lower connector (not shown) connected to the vehicle body connector 76 (FIG. 4) is fixed inside the housing 32 in a state of being coupled to the traveling portion 10 by the front engagement pipe 90a and the rear coupling structure 94. There is.

FIG. 10 is a schematic cross-sectional view taken along the line XX in FIG. As shown in FIG. 10, the seat post 38 is attached to the housing 32 so as to extend in the vertical direction inside the housing 32 and to extend upward from the upper edge of the housing 32. The seat post 38 is composed of a known gas spring whose length can be adjusted, and includes a cylinder 102 and a piston rod 104 inserted therein. The cylinder 102 is fixed to the frame 90 of the housing 32, and a lever (not shown) is provided at the lower end of the cylinder 102. The lever is connected to a control lever 108 provided on the upper portion of the seat post 38 by a control cable 106 (a cable and a cable holding pipe that slidably holds the cable). By operating the operation lever 108, the lock on the piston rod 104 is released, and the gas enclosed in the cylinder 102 pushes the piston rod 104 in the extension direction. Further, when a large compressive load is applied to the piston rod 104 while the control lever 108 is operated, the piston rod 104 is pushed back in the shortening direction.

An upper opening cylindrical support member 110 is fixed to the upper end of the piston rod 104. On the front side of the support member 110, a slide bar 112 extending in the left-right direction is provided slidably in the left-right direction. As shown in FIG. 7, the slide bar 112 is unlocked by the slide operation knob 114 by pulling the slide operation knob 114 forward, and can slide in the left and right direction. The slide operation knob 114 is engaged with one of the plurality of engagement recesses 112 a formed on the front surface of the slide bar 112 to lock the slide of the slide bar 112. The control lever 108 is rotatably provided at the right end of the slide bar 112.

As shown in FIG. 10, the support member 110 is provided with a rotation mechanism 116. The rotation mechanism 116 is an annular ball bearing 118 provided at upper and lower two stages inside the support member 110 and a cylindrical rotation cylinder of a lower opening which is fitted inside the ball bearing 118 and rotatably supported. It is constituted by the member 120. A sheet support portion 122 for supporting the sheet 42 is fixed to an upper portion of the rotating cylindrical member 120. That is, the seat post 38 forms a height adjustment mechanism that couples the seat support portion 122 to the housing 32 in a height adjustable manner.

The sheet support portion 122 is a press-formed product formed of a steel plate having a central portion fixed to the rotary cylinder member 120 and left and right side portions formed to be flush with each other at a position higher than the central portion. . On the upper surface of the left side portion of the seat support portion 122, an electric upper connector 124 for electrically connecting to the riding portion 40 is provided. The rotation mechanism 116 rotatably connects the rotating cylindrical member 120 and the sheet support portion 122 to the support member 110 and the housing 32 in a plan view.

FIG. 11 is a cross-sectional view of main parts shown along the line XX in FIG. A rotation lock member 128 is attached to the lower surface of the right side portion of the seat support portion 122 by a hanging bracket 126. The rotation lock member 128 is provided at a position facing the outer peripheral surface of the support member 110, is provided movably in the radial direction of the support member 110, and has an engagement tip 128a biased inward in the radial direction. doing. The engagement tip portion 128 a is capable of being engaged with and engaged with one of a plurality of recessed holes 110 a formed on the outer peripheral surface of the support member 110. The rotation lock member 128 disengages the engagement tip 128a from the recessed hole 110a by operating the operation grip 128b provided radially outside the support member 110 further than the bracket 126 to the outside. When the engagement tip 128a is disengaged from the concave hole 110a of the support member 110, the sheet support portion 122 can rotate relative to the support member 110. The recessed holes 110 a of the present embodiment are provided at every 90 degrees in the circumferential direction on the outer peripheral surface of the support member 110, and the rotation lock member 128 is a position where the seat support portion 122 faces the front and back direction. And can be fixed at a position facing in the left-right direction.

As shown in FIGS. 7 and 10, a gripping member 130 is attached to the upper surface of the central portion of the sheet support portion 122. The gripping member 130 has a rectangular base portion 132 which is long in the front-rear direction fixed to the seat supporting portion 122, and an electric component gripping portion 134 which extends upward from the base portion 132 in a tapered shape. ing. The electric holding portion 134 forms a holding grip extending in the front-rear direction above the seat support portion 122 by forming a first horizontal hole 134 a penetrating in the left-right direction. Further, a second horizontal hole 134b is formed in the lower part of the electric component holding portion 134 in the front-rear direction. The front surface of the electrical component holding portion 134 is a curved surface that inclines rearward and upward. On the rear surface of the electric component holding portion 134, a recessed portion 134c is formed.

FIG. 12 is a perspective view of the bottom side of the riding portion 40. FIG. As shown in FIG. 12, left and right support seats 136 supported by the left and right side portions of the seat support portion 122 are formed on the bottom surface of the riding portion 40, that is, the bottom surface of the seat cushion 46. The left and right support seats 136 are formed on the highly rigid seat frame 50 of the seat cushion 46. A downward opening recess 138 is formed between the left and right support seats 136 on the bottom surface of the seat cushion 46. The left support seat 136 is provided with a seat-side connector 140 connected to the electrical upper connector 124 (FIG. 7).

FIG. 13 is a cross-sectional view taken along the line XIII-XIII in FIG. As shown in FIGS. 12 and 13, a seat side engagement pipe 142 is provided at the rear of the recess 138 and extends laterally and engages with the recess 134c of the electrical component grip 134. At the front of the recess 138, an engagement member 144 is provided which is movable in the front-rear direction and biased rearward. The rear surface of the engagement member 144 is inclined forward and downward. At the front of the engagement member 144, an operation member 146 which extends forward and is provided so as to be exposed on the front surface of the seat cushion 46 is connected. By operating the operation member 146 forward, the engagement member 144 moves forward. Further, when an upward load is applied to the rear surface of the engagement member 144, the engagement member 144 moves forward against the biasing force.

In the riding portion 40, the seat side engagement pipe 142 engages with the recessed portion 134c of the electrical gripping portion 134 in a state where the recess 138 receives the electrical gripping portion 134, and the engagement member 144 is the lower surface of the front end of the electrical gripping portion 134. As a result, the support seat 136 is supported by the seat support portion 122, and the seat side connector 140 is coupled to the electrical component unit 30 in a state of being connected to the electrical component upper connector 124 (FIG. 7). That is, the seat side engagement pipe 142 and the engagement member 144 constitute a second coupling portion detachably coupled to the seat support portion 122.

When releasing the connection of the loading unit 40 to the electrical unit 30 (separating the two members), the operation member 146 is operated forward to release the engagement of the engagement member 144 with the electrical grip unit 134. In this state, the sheet gripping portion 54 may be lifted to rotate the boarding portion 40 about the sheet side engaging pipe 142, and then the sheet gripping portion 54 and the rear portion of the seat cushion 46 may be simultaneously lifted.

Conversely, when connecting the loading unit 40 to the electrical component unit 30, the lifting component part 40 is lowered from above with respect to the electrical component unit 30, and the electrical component gripping unit 134 is pushed into the recess 138. After the support seat 136 is brought into contact with the seat support portion 122, the seat side engagement pipe 142 is moved to the recessed portion 134c of the electrical holding portion 134 by moving forward while keeping the loading portion 40 inclined rearward. Engage. After the seat side engagement pipe 142 is engaged with the recessed portion 134c, the boarding portion 40, which has been inclined, is tilted forward so as to assume the original running posture. As a result, the engaging member 144 is pushed forward and engaged with the front end of the electrical holding portion 134, and the riding portion 40 is coupled to the electrical portion 30.

When the electric component gripping portion 134 is pushed into the recess 138, the electric component gripping portion 134 is tapered upward, so the recess 138 is guided by the electric component gripping portion 134, and the boarding portion 40 has a predetermined connection. Placed in position. Thus, the second connecting portion (the seat side engaging pipe 142 and the engaging member 144) provided at the bottom of the loading portion 40 can be easily connected to the sheet supporting portion 122.

FIG. 14 is a perspective view of an essential part of the seat 42 in a state in which the seat surface 42 a is inclined. The boarding portion 40 is provided with an inclination mechanism 150 for inclining the seat surface 42 a of the seat 42 forward by inclining the cushion portion 52 with respect to the seat frame 50. The tilting mechanism 150 includes a left and right biasing members 152 that connect the cushion portion 52 and the seat frame 50 and bias the two in a direction away from each other. The biasing member 152 is constituted by a gas spring. The cushion portion 52 is rotatably connected to the seat frame 50 at the front end. Left and right seat strikers (not shown) are provided at the rear of the lower surface of the cushion portion 52, and the seat frame 50 is provided with left and right seat latches 154 engageable with the corresponding seat striker. A seat surface control lever 156 for releasing the engagement of the seat latch 154 engaged with the seat striker is provided on the right side surface of the seat frame 50. By operating the seat control lever 156, the left and right seat latches 154 move rearward to release the engagement with the seat striker. Thus, the left and right biasing members 152 extend, and the cushion portion 52 pivots upward and forward.

As described above, the loading unit 40 includes the tilting mechanism 150 for tilting the seating surface 42a of the seat 42 forward in the assembled state, and the seating mechanism 42a of the seat 42 can be tilted forward by the tilting mechanism 150. It is possible to easily move up from the posture of sitting at 42. In other embodiments, the tilting mechanism 150 may be configured to tilt the entire seat cushion 46.

FIG. 15 is a perspective view of the riding portion 40 during folding. As described above, the seat back 48 is foldable relative to the seat cushion 46. Specifically, the seat back 48 is coupled to the seat cushion 46 so as to be pivotable at the lower end about the pivoting axis in the left-right direction, and the upper portion from the position for boarding and the position for boarding shown in FIG. It can be pivoted forward, and can be pivoted between a folded position overlapping the seat cushion 46.

The left and right armrests 44 are foldable relative to the seat cushion 46. Specifically, the armrest 44 is pivotably connected to the seat back 48, and can pivot about a substantially horizontal extending elbow rest portion 160, an intermediate portion in the front-rear direction of the elbow rest portion 160, and the seat cushion 46 And a support portion 162 connected to the The elbow mount portion 160 has a rear portion and a front portion divided in front of a portion to which the support portion 162 is connected, and the front portion is rotatable around a pivot axis in the lateral direction with respect to the rear portion There is. The front portion of the elbow mount 160 is pivotable between a position for boarding shown in FIG. 1 and a folding position for pivoting upward and backward from the position for boarding and overlapping the rear portion . That is, the operation box 56 is foldable relative to the armrest 44 for the right arm. The rear portion of the elbow rest 160 and the post 162 are folded in conjunction with the seat back 48 when folded. Thus, the armrest 44 is provided foldably with respect to the seat cushion 46, and the operation box 56 is provided foldably with the armrest 44 so that the armrest 44 and the operation box 56 can be compactly stored in the folded state. It is possible to provide the boarding section 40.

The rear portion of the elbow mount 160 further extends rearward from the connecting portion with the seat back 48, and left and right stopper members 164 extending inward in the left-right direction are provided at the extension end thereof. When in the riding position shown in FIG. 1, the stopper member 164 abuts on the top of the back surface of the seat back 48 and restricts further rearward rotation of the seat back 48. Further, when the seat back 48 is folded, the stopper member 164 interlocks with this and the armrest 44 is folded, whereby a holder 166 provided at the lower part of the back of the seat back 48 (FIG. 2, FIG. 12) Is held by As the stopper member 164 is held by the holder 166, the riding portion 40 is held in the folded state.

The seat frame 50 of the seat cushion 46 has an L-shape which rises upward at the rear. As a result, when the trailing edge of the seat frame 50 functions as the standing stand 168 and the folding unit is in the folded state, the boarding unit 40 holds the standing posture with the sheet gripping unit 54 facing upward as shown in FIG. Can. As a result, the occupied area of the boarding unit 40 at the time of non-use in which the electric wheelchair 1 is divided and stored in a storage place or the like is reduced, and the boarding unit 40 can be stored in a narrow space. Further, the user can easily perform the lifting operation of the boarding unit 40 in the standing posture and the operation of arranging the boarding unit 40 being lifted in the standing posture.

In addition, the sheet gripping portion 54 is located at the periphery of the folded-up loading portion 40, and particularly at the upper end on the side opposite to the rising stand 168 of the folded-up loading portion 40 when in the upright position. doing. Therefore, the passenger seat 40 with the seat back 48 folded is gripped by both hands with the seat gripping portion 54 and the opposite portion thereof, and is attached to and detached from the electrical unit 30; It is possible to carry it in a suspended manner, and the handling of the boarding portion 40 is easy.

When the electric wheelchair 1 is divided, the folding operation of the boarding unit 40 can be easily performed by performing the folding operation first, that is, in the state of being assembled on the electric unit 30. The unfolding operation of the boarding portion 40 can be easily performed even after being assembled on the traveling portion 10 or even before being assembled, but in order to facilitate the operation of assembling the boarding portion 40 to the electrical component portion 30 After the mounting unit 40 is assembled to the electrical component unit 30 in the folded state, the mounting unit 40 may be deployed.

The electric wheelchair 1 configured as described above has the front engagement pipe 90a, the rear latch 96, and the seat support part 122 of which the electric part 30 forms the first coupling part, and connects the traveling part 10 and the riding part 40. In order to do this, as shown in FIG. 3, the electric wheelchair 1 can be divided into three units by removing the boarding unit 40 from the electrical unit 30 and removing the electrical unit 30 from the traveling unit 10. The traveling unit 10 is compact without requiring a folding operation when the electric unit 30 is removed because the vehicle body frame 12 is flat. Further, since the electric wheelchair 1 is divided into three units, and the electric unit 30 connecting the boarding unit 40 to the traveling unit 10 at least includes the battery 34 which is a heavy object, the variation in weight of the three units is suppressed. This facilitates handling of each unit after division.

As described above, since the seat post 38 and the rotation mechanism 116 that make up the height adjustment mechanism of the electrical unit 30 are provided, height adjustment of the boarding unit 40 with respect to the traveling unit 10 and The rotation can be made possible. And since height adjustment and rotation with respect to the traveling part 10 of the boarding part 40 become possible, expansion of the use according to a user's physique and usage condition and facilitation of getting on and off become possible.

Although the description of the specific embodiment is finished above, the present invention can be widely modified and implemented without being limited to the above embodiment. For example, although the electric wheelchair 1 is configured as a four-wheeled wheelchair in the above embodiment, it may be configured as a three-wheeled wheelchair, or may be configured as a wheelchair having five or more wheels. Moreover, in the said embodiment, although the electrically-wired part 30 is equipped with both the seat post 38 and the rotation mechanism 116 which make a height adjustment mechanism, you may be equipped only with one of these. Further, the operation box 56 is not limited to joysticks, and may have other forms of operation components such as buttons, levers, and touch panels. In addition, the specific configuration and arrangement of each member or part, the number, the angle, and the like can be appropriately changed without departing from the scope of the present invention. On the other hand, not all of the components shown in the above embodiment are necessarily essential, and can be selected as appropriate.

Reference Signs List 1 electric wheelchair 10 traveling unit 12 body frame 14 front wheel 16 rear wheel 18 electric motor 30 electric unit 34 battery 38 seat post (height adjustment mechanism)
40 boarding portion 42 seat 42a seat surface 44 armrest 46 seat cushion 48 seat back 54 seat gripping portion (third gripping portion)
56 Operation box (operation unit)
60 Overturning prevention member 84 Frame gripping portion (second gripping portion)
90a Front engagement pipe (first joint)
96 Rear latch (first joint)
116 rotation mechanism 122 seat support portion 134 electrical holding portion (first holding portion)
138 Recess 142 Seat side engagement pipe (second joint)
144 Engaging member (second joint)
150 tilting mechanism 168 standing stand

Claims

A flat body frame, at least three wheels supported by the body frame, and a traveling unit having a motor for driving the wheels;
An electrical component including at least a battery, a first coupling portion detachably coupled to the vehicle body frame, and an electrical component having a seat support portion;
A seat serving as a passenger seat, and a riding portion provided at a bottom portion of the seat and having a second coupling portion detachably coupled to the seat support portion;
An electric wheelchair characterized in that an assembled state in which the traveling part, the electric part and the boarding part are connected to each other and a divided state in which they are separated from each other.
The electrical component unit has a height adjustment mechanism that couples the sheet support unit to the first coupling unit in a height adjustable manner, and the sheet support unit can rotate relative to the first coupling unit in plan view The motor-driven wheelchair according to claim 1, further comprising at least one of rotation mechanisms coupled thereto.
The electrical component further includes a first grip portion having a tapered shape upward at an upper portion in a state in which the electrical component is assembled to the traveling portion,
The electric wheelchair according to claim 1 or 2, wherein the second coupling portion is formed with a recess which is opened downward in the assembled state and receives the first grip portion.
The traveling unit further includes a second gripping unit that brings to the traveling unit an inclined posture in which the two wheels are grounded and the at least one wheel is floated by being held by the user in the divided state. The electric wheelchair according to any one of claims 1 to 3, wherein
The traveling unit further includes a fall prevention member that prevents a fall of the electric wheelchair by grounding the electric wheelchair in the assembled state by tilting to the rear, and the fall prevention member is for preventing the fall of the electric wheelchair. And a stand position different from the overturning prevention position, in which the traveling unit holds the standing posture in which the two wheels stand up in the divided state. The motor-driven wheelchair according to any one of claims 1 to 4, which is configured to be movable.
The electric wheelchair according to any one of claims 1 to 5, wherein the traveling unit comprises at least one omnidirectional moving wheel.
The seat includes a seat cushion supported by the electrical unit and a seatback foldably provided to the seat cushion.
The electric wheelchair according to any one of claims 1 to 6, wherein the riding portion further includes a third grip portion arranged at a peripheral portion in a state where the seat back is folded.
The boarding unit further includes an upright stand that is grounded so that the boarding unit is held in an upright posture in which the seat is in a vertical position when the seatback is folded.
The electric wheelchair according to claim 7, wherein the third grip portion is provided on a side of the boarding portion opposite to the standing stand in a state where the seat back is folded.
The boarding unit may further include an armrest provided foldably with respect to the seat cushion, and an operation unit provided foldably with the armrest for operating a drive wheel. Or the electric wheelchair of Claim 8.
The electric wheelchair according to any one of claims 1 to 9, wherein the riding portion further includes an inclination mechanism which inclines the seat surface of the seat forward in the assembled state.