JP4529543B2 - Electric wheelchair - Google Patents

Description

  The present invention relates to an electric wheelchair that facilitates getting on and off by tilting a chair portion forward when a user gets on and off.

A conventional example of such an electric wheelchair is disclosed in Patent Document 1. This electric wheelchair is composed of a seat portion in which a seat portion, a backrest portion, and a leg support portion are integrally formed between a sitting state in which the leg support portion is not grounded and a forward tilt state in which the leg support portion is grounded. Is supported by a frame so that it can be rotated, and the center of rotation of the seat portion is provided in the vicinity of the center of gravity of the user who is seated.
Japanese Patent Laid-Open No. 8-275973

  However, since the seat seat portion (seat portion, backrest portion, leg rest portion) is pivoted (tilted forward) as a whole, the leg rest portion is grounded. In order to rotate the part, it is necessary to give the rotational bearing part a great strength, and the weight and manufacturing cost increase, and the position of the rotational bearing part is in the vicinity of the center of gravity of the user in the seated state. Due to restrictions, the degree of freedom in appearance design was low.

  In addition, there is a surface that is easy to get on and off because the entire seat and chair is turned (tilted forward) and the leg rest is grounded, but when the seat and chair is turned, the seat is not grounded. There is a concern that the electric wheelchair becomes unstable because the front part and the backrest part tilt forward.

  The present invention has been made to solve the above-described problems, and has a small structure, light weight, simple structure, good boarding / exiting characteristics, good stability and riding comfort during boarding / running, and low power consumption. An object of the present invention is to provide an electric wheelchair that is low in cost, has a high degree of design freedom, and is easy to handle by an assistant.

In order to achieve the above object, an electric wheelchair according to the present invention includes a chair portion having a seat portion and a backrest portion that rises upward from a rear end portion of the seat portion, as described in claim 1 of the claims. , Footrests for footrest placed on the front lower side of this chair part, front wheels placed on the left and right sides of the lower part of the chair part and driven by electric motors, and tilts arranged on the left and right sides of the lower part of the chair part A tilt arm mounted on the shaft, a steerable rear wheel provided at the other end of the tilt arm, and the rear wheel can swing up and down with respect to the chair portion between the chair portion and the tilt arm. a suspension device provided with a tilt actuator for holding, footrest actuator to allow lifting between a passenger position in contact with the traveling position and ground away the footrest from the ground And a footrest lifting device provided with, while the front wheel axle is arranged at the front end portion below the chair portion, by the tilt actuator of the suspension device, lower the rear portion of the chair portion to the axle of the front wheels as the pivot center When the chair part is displaceable from the running position to the boarding / alighting position by moving the chair part from the running position to the boarding / alighting position, the footrest lifting device contacts the ground from the running position to the ground first. When the suspension device displaces the chair part from the traveling position to the boarding / exiting position and conversely displaces the chair part from the boarding / exiting position to the traveling position, the suspension apparatus first moves the chair part from the boarding / exiting position to the traveling position. After displacement, the footrest lifting device changes from the boarding / exiting position where the footrest touches the ground to the traveling position. Controlled so as to be further provided with a suspension stroke of the suspension device, and a passenger position locking means the back of the chair parts at maximum extension of the suspension device is locked in passenger position anteversion is pushed up by the chair portion upward It was.

Furthermore, the electric wheelchair according to the present invention is, as described in claim 2 of the claims , an extension restriction that prevents the suspension stroke of the suspension device from extending beyond the suspension stroke required when the electric wheelchair is traveling. Means are provided, and the suspension stroke of the suspension device is controlled by the extension regulating means when the footrest is in the traveling position.

In the electric wheelchair according to the present invention, as described in claim 3 of the claims , the footrest has a front-rear position at the boarding / alighting position in front of the ground point of the front wheel, and the footrest At the boarding / alighting position in contact with the ground, when the tilt actuator is moved to the maximum extension state , an idle section is provided to absorb the movement between the footrest and the footrest actuator to displace the chair portion from the running position to the boarding / alighting position. Provided.

According to a fourth aspect of the present invention, the electric wheelchair includes a battery for supplying electric power to the electric motor, as viewed from the side, closest to the front under the seating portion, and the front wheel. It was placed near the upper part of the axle.

  According to the first aspect of the present invention, the rear portion of the chair portion is raised using the suspension device for the rear wheel, and the chair portion is tilted forward from the traveling position to the getting on / off position with the axle of the front wheel as the rotation center. There is no need for a dedicated actuator or rotating shaft for tilting forward. For this reason, it is possible to obtain a stable and good boarding / exiting property with a small and simple structure, to make the electric wheelchair lightweight and to save power, and to increase the design flexibility of the electric wheelchair. .

  In addition, the boarding / exiting position locking means may have a simple structure that can prevent the suspension device from contracting, and the chair part is locked at the boarding / exiting position by the boarding / exiting position locking means, so that the chair part is not required to move back and forth during boarding / exiting. Because it is regulated, it has good stability when getting on and off and does not give the user a sense of insecurity.

In addition, when the user gets off the electric wheelchair (stands up), the chair part begins to tilt forward after the footrest touches down, so the chair part does not tilt forward with the user's feet away from the ground. In addition, when the user sits on the electric wheelchair, the chair does not tilt backward with the user's feet away from the ground, which improves the stability of the electric wheelchair when getting on and off, and You can get on and off with a heart.

According to the second aspect of the present invention, when the electric wheelchair is traveling, unnecessary swinging of the chair portion in the front-rear direction is restricted, and the riding comfort during downhill traveling or uneven road surface traveling where the shared load of the rear wheel is reduced is reduced. In addition to improving the stability, the rear wheel quickly leaves the ground when the rear part of the electric wheelchair is lifted, so that the handling ability by the assistant can be improved.

According to the invention of claim 3 , since all the front and rear wheels and the footrest are kept in a grounded state when getting on and off, the stability of the electric wheelchair at the time of getting on and off can be improved.

According to the invention of claim 4 , since the heavy battery is arranged below the front portion of the chair portion, the load applied to the suspension device of the rear wheel is reduced, thereby reducing the repulsive force of the suspension device and riding. In addition to improving the comfort, it is possible to reduce the necessary force for lifting the rear part of the electric wheelchair and improve the handling performance by the assistant.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an electric wheelchair according to an embodiment of the present invention as seen from the left oblique front, FIG. 2 is a perspective view seen from the left oblique rear, and FIGS. FIG. 7 is a left side view showing a state in which a user is sitting on an electric wheelchair.

  A chair portion 2 that is a main part of the electric wheelchair 1 includes a seat portion 3, a backrest portion 4 that rises upward from the rear end portion of the seat portion 3, and a pair of left and right armrest portions 5. A flat footrest 7 for placing a foot is disposed on the front lower side.

  Front wheels 9 are arranged on the left and right sides of the lower part of the chair part 2, and rear wheels 10 are arranged on the left and right sides of the lower part of the chair part 2. The diameter of the left and right front wheels 9 is, for example, about 20 inches, and an electric motor 11 is provided on the inner surface side of the central portion thereof. Each front wheel 9 is a drive wheel that is directly driven by the electric motor 11. On the other hand, the rear wheel 10 is a caster-type driven wheel, and can be steered freely by swinging its neck, and its diameter is, for example, about 10 to 12 inches.

  The axle of the front wheel 9, that is, the electric motor 11, is disposed below the front end of the chair portion 2 (seat portion 3) in a side view, and the height of the outer peripheral upper edge of the front wheel 9 is substantially the same as the top surface of the seat portion 3. The front half of the front wheel 9 projects forward from the front end of the seating portion 3 so that the front half of the front wheel 9 sandwiches the footrest 7 from both the left and right sides.

  Further, the left and right side portions of the chair portion 2 from the seating portion 3 to the lower half of the backrest portion 4 and the portion below the front end portion of the seating portion 3 are covered with a body cover 14 made of resin, for example. The body cover 14 is integrally formed with a wheel cover 15 that covers the upper part and the front half part of the left and right front wheels 9 from the inside in the vehicle width direction and from above. A soft buffer pad 16 is attached to the inner surface of the wheel cover 15.

  For this reason, it is possible to prevent the user's lower limbs and feet sitting on the chair portion 2 from interfering with the front wheel 9 and to allow the user to get in a relaxed posture. Further, since the user can support the swinging of the upper body accompanying the running of the electric wheelchair 1 by bringing the lower limbs (knees) into contact with the wheel cover 15 (buffer pads 16), even during long-time use. The electric wheelchair 1 can be used comfortably without feeling fatigue.

  A battery 18 that supplies electric power to the electric motor 11, its charger 19, and a controller 20 and other devices are disposed below the seating portion 3 so as to be covered by the body cover 14. These devices 18 to 20 are arranged on the most front side under the seat portion 3 in a side view, and are located near the upper portion of the axle (electric motor 11) of the front wheel 9 and covered with the body cover 14.

  A front bar 23 extends in the vehicle width direction in front of the chair portion 2. The front bar 23 is constructed so as to connect the front ends of the left and right armrests 5. For example, the right end of the front bar 23 is rotatably connected to the front end of the right armrest 5 via a hinge portion 24. The left end of the bar 23 is detachably connected to the front end of the left armrest portion 5 via an engagement / disengagement mechanism 25.

  A steering handle mechanism 27 is provided on the upper surface of the intermediate portion of the front bar 23, a steering handle 28 is attached to the steering handle mechanism 27, and an accelerator lever 29 is provided on the steering handle 28.

  By rotating the steering handle 28 to the left and right and simultaneously operating the accelerator lever 29 as appropriate, the voltage of the battery 18 is controlled by the controller 20 and supplied individually to the left and right electric motors 11. The rotation speed is set, and the electric wheelchair 1 is moved forward, backward, stopped, left and right, and rotated left and right. For this reason, special training is not required unlike the joystick lever type steering means, and even the elderly can easily operate the electric wheelchair 1. Further, when the accelerator lever 29 is released, a counter electromotive force is generated in the electric motor 11 and decelerates due to the rotational resistance of the front wheel 9, and then the electric wheelchair 1 is stopped by an electromagnetic brake provided integrally with the electric motor 11.

  The front bar 23 is unlocked by the engagement mechanism 25 at the left end, thereby rotating the hinge portion 24 forward about the axis, and as shown in FIG. 3 and FIG. Can move up to 23b. The left and right armrests 5 can be flipped up to the pop-up position 5a by moving the hinge shaft 32 shown in FIGS. 1 and 2 or the hinge shaft 33 shown in FIG. 4 upward.

  An angle adjustment shaft 34 shown in FIGS. 1 and 2 or an angle adjustment shaft 35 shown in FIG. 4 is provided at the intermediate portion in the vertical direction of the backrest portion 4. The angle adjusting shafts 34 and 35 extend in the vehicle width direction, and the height thereof is set near the height of the armrest portion 5. Then, the angle of inclination in the front-rear direction of the upper half of the backrest 4 can be adjusted within the range indicated by lines 4a to 4b in FIG.

  Therefore, by appropriately adjusting the angle of the upper half of the backrest 4, even if the user who operates the steering handle 28 unconsciously approaches the steering handle 28, the user's upper body is separated from the backrest 4. And the stability of the upper body of the user can be improved.

  In addition, as shown in FIG. 2, an angle changing device 36 is provided on the rear surface of the backrest portion 4 to change the front-rear direction inclination angle of the upper half of the backrest portion 4. The angle changing device 36 is built in the angle changing device 36. The angle of the upper half of the backrest 4 is changed by an actuator such as an electric motor. An angle change switch 37 (see FIG. 3) for operating the angle change device 36 is provided at the steering handle 28.

  For this reason, when the user operates the angle change switch 37 and moves the angle change device 36, the inclination angle in the front-rear direction of the upper half of the backrest portion 4 can be easily adjusted to an optimum angle.

  Incidentally, as shown in FIG. 4, the footrest 7 is supported by a parallel link mechanism 40 including a pair of left and right front links 41 and a rear link 42, and travels away from the ground while maintaining an angle parallel to the ground. It is possible to move between the position 7a and the boarding / alighting position 7b in contact with the ground. For example, the center of rotation of the front link 41 coincides with the axle position of the front wheel 9, but may be another place as long as it is in this vicinity.

  The height of the footrest 7 at the traveling position 7a is slightly lower than the height of the axle of the front wheel 9. Further, the position of the footrest 7 in the front-rear direction is substantially the same as the front end portion of the front wheel 9 at the traveling position 7a, and is slightly ahead of the ground point (axle) of the front wheel 9 at the getting-on / off position 7b.

  The rear link 42 of the parallel link mechanism 40 is integrally provided with a crank link 43 in the vicinity of the rotation point thereof, and a pivot shaft provided below the front end of the crank link 43 and the seat portion 3. A telescopic footrest actuator 45 is connected to the actuator 44. When the footrest actuator 45 is extended, the footrest 7 is raised to the traveling position 7a, and when the footrest actuator 45 is contracted, the footrest 7 is lowered to the getting on / off position 7b.

  The parallel link mechanism 40, the crank link 43, the pivot shaft 44, the footrest actuator 45, and the like constitute a footrest lifting device 47.

  On the other hand, a tilt shaft 50 extending in the vehicle width direction is provided at the rear lower portion of the chair portion 2 (seat portion 3), and a pair of left and right tilt arms 51 are provided integrally with the tilt shaft 50. The rear wheel 10 is supported by the tilt arm 51 via the caster arm 52. The caster arm 52 extends rearward and obliquely downward from the rear end of the tilt arm 51 in a side view, and is rotatable about the caster axis C with respect to the tilt arm 51. Therefore, the rear wheel 10 is a caster-type driven wheel (steering). Can function as a ring).

  As the tilt arm 51 rotates about the tilt shaft 50, the rear wheel 10 moves in a range between the traveling position 10a and the getting on / off position 10b as shown in FIG. At the boarding / exiting position 10b, the wheel base between the front and rear wheels 9, 10 is shorter than the traveling position 10a by about several tens of centimeters. At this time, the caster arm 52 of the rear wheel 10 stands almost vertically and the rear part of the chair part 2 is raised upward Therefore, the entire chair portion 2 is inclined forward about the axle of the front wheel 9. The position of the chair part 2 at this time is the boarding / alighting position 2b, and the position of the chair part 2 when the rear wheel 10 is in the traveling position 10a is the traveling position 2a.

  A telescopic tilt actuator 59 (for example, a gas spring) is connected between a pivot shaft 57 provided in the intermediate portion of the tilt arm 51 and a pivot shaft 58 provided in the intermediate portion of the backrest portion 4. When the tilt actuator 59 is contracted, the rear wheel 10 and the chair portion 2 are moved to the travel positions 10a and 2a, respectively, and when the tilt actuator 59 is extended, the rear wheel 10 and the chair portion 2 are moved to the getting on / off positions 10b and 2b, respectively.

  The tilt shaft 50, the tilt arm 51, the caster arm 52, the pivot shaft 57, the pivot shaft 58, and the tilt actuator 59 constitute a suspension device 60 that holds the rear wheel 10 so as to swing up and down with respect to the chair portion 2. .

  When the electric wheelchair 1 travels, that is, when the chair portion 2 is at the travel position 2a, the tilt actuator 59 of the suspension device 60 can be elastically expanded and contracted, and the rear wheel 10 can swing up and down according to the uneven shape of the travel road surface. Therefore, the riding comfort and stability of the electric wheelchair 1 are improved.

  The suspension stroke of the suspension device 60 (the swing stroke of the rear wheel 10) is set so that the chair portion 2 is displaced to the boarding / alighting position 2a when the tilt actuator 59 is fully extended. And as shown in FIG. 9, the solenoid 61 as a boarding / alighting position locking means which locks the tilt actuator 59 in this fully extended state is provided. The solenoid 61 is automatically turned on when the chair portion 2 tilts forward to the boarding / alighting position 2b, and restricts the contraction of the tilt actuator 59 that is in the maximum extension state. A dedicated switch may be provided to arbitrarily turn on the solenoid 61.

  Further, a solenoid 62 is provided as an extension restricting means for preventing the suspension stroke of the suspension device 60 from extending beyond the suspension stroke required when the electric wheelchair 1 travels. The solenoid 62 may be controlled to be automatically turned on when the chair portion 2 is at the travel position 2a, or may be arbitrarily turned on by providing a dedicated switch.

  For example, by moving the front bar 23 from the running position 23a to the swing-out position 23b, the getting-on / off switch 63 (see FIGS. 3 and 4) provided on the hinge portion 24 is turned on, and the footrest actuator 45 and the tilt actuator 59 are interlocked. As the footrest 7 is lowered to the boarding / exiting position 7b, the rear wheel 10 and the chair portion 2 are displaced to the boarding / exiting positions 10b and 2b, respectively. At this time, the solenoid 61 is turned on and the chair portion 2 is locked at the boarding / alighting position 2b.

  As a result, as shown in FIG. 8, the user's foot placed on the footrest 7 is in the same state (height) as is attached to the ground, and the chair portion 2 as a whole is tilted forward and the front end of the seat portion 3. Therefore, the user can get on and off the electric wheelchair 1 with a very easy posture. At this time, since the footrest 7 is in contact with the ground, the stability of the electric wheelchair 1 is also kept good.

  Here, when the front bar 23 is moved from the traveling position 23a to the swing-out position 23b and the on / off switch 63 is turned on, the footrest actuator 45 is first activated to lower the footrest 7 from the traveling position 7a to the on / off position 7b. Then, the suspension device 60 (tilt actuator 59) is activated to displace the chair portion 2 from the traveling position 2a to the getting-on / off position 2b.

  Thus, by delaying the activation timing of the tilt actuator 59 with respect to the activation timing of the footrest actuator 45, the chair portion 2 starts to tilt forward after the footrest 7 is securely in contact with the ground. When the user gets off (stands up), the chair part 2 does not tilt forward when the user's foot is away from the ground, and the user can get off with peace of mind.

  Further, when the chair portion 2 is displaced to the boarding / alighting position 2b, the tilt actuator 59 is in the maximum extension state, and at this time, the tilt actuator 59 is locked and contracted by the solenoid 61, so Necessary longitudinal movement is regulated. For this reason, the stability at the time of boarding / alighting is good, and a user does not feel uneasy.

  By the way, the footrest 7 is provided with an idle section at the boarding / exiting position 7b. That is, as shown in FIG. 4, the footrest 7 in the boarding / alighting position 7b can float (float) to the upper floating position 7c. This floating position 7c is the same as the position of the footrest 7 when the chair portion 2 is at the getting on / off position 2b as shown in FIG.

  For this reason, when the footrest 7 first descends to the boarding / alighting position 7b and then the chair part 2 tilts forward to the boarding / alighting position 2b as described above, the footrest 7 moves from the boarding / alighting position 7b as the chair part 2 tilts forward. It moves to position 7c. Accordingly, the chair portion 2 can be smoothly displaced from the traveling position 2a to the boarding / exiting position 2b, and in this case, the front and rear wheels 9, 10 and the footrest 7 are all grounded, so that the stability of the electric wheelchair 1 at the time of boarding / exiting is improved. Can do.

  On the other hand, when the front bar 23 is moved from the swing-out position 23b to the traveling position 23a and the getting-on / off switch 63 is turned OFF, the tilt actuator 59 is first activated to return the chair portion 2 from the getting-on / off position 2b to the traveling position 2a. The footrest actuator 45 is activated to raise the footrest 7 from the boarding / exiting position 7b (7c) to the traveling position 7a.

  When the chair part 2 returns from the boarding / exiting position 2b to the traveling position 2a, the footrest 7 moves relative to the chair part 2 from the floating position 7c to the boarding / exiting position 7b. The chair portion 2 does not tilt backward with the user's feet away from the ground, and the user does not feel uneasy.

  A pair of left and right recesses 65 that are recessed forward are provided on the left and right sides of the upper portion of the back surface of the backrest portion 4, and an assistant grip 66 is fixed to the recesses 65.

  The electric wheelchair 1 configured as described above uses the suspension device 60 of the rear wheel 10 to raise the rear part of the chair part 2, thereby moving the chair part 2 around the axle of the front wheel 9 as the rotation center and the traveling position 2 a. Since the vehicle is tilted forward to the boarding / exiting position 2b, there is no need for a dedicated actuator or a rotating shaft for tilting the chair portion 2 forward. Further, the solenoid 61 as the getting-on / off position locking means and the solenoid 62 as the extension restricting means may have a simple structure capable of restricting expansion / contraction and extension of the tilt actuator 59.

  For this reason, the electric wheelchair 1 can be provided with good stability by a small and simple structure and the stability can be improved, and the electric wheelchair 1 can be configured to be lightweight to achieve power saving. In addition, the design freedom of the electric wheelchair 1 can be dramatically increased.

  In addition, since the solenoid 62 is provided as an extension restricting means on the tilt actuator 59 of the suspension device 60 and the suspension stroke of the suspension device 60 is restricted when the chair portion 2 and the footrest 7 are at the travel positions 2a and 7a, respectively, the electric wheelchair 1 This restricts unnecessary swinging of the chair portion 2 in the front-rear direction during traveling, improving the ride comfort especially during downhill traveling or uneven road traveling where the shared load of the rear wheel 10 is reduced, When gripping the assistant's grip 66 and lifting the rear part of the electric wheelchair 1, the rear wheel 10 can be easily separated from the ground, and the handling ability by the assistant can be improved.

  Further, since the heavy battery 18 is disposed below the front portion of the chair portion 2, the load applied to the suspension device 60 of the rear wheel 10 is reduced, thereby reducing the repulsive force of the suspension device 60 and improving the riding comfort. While improving, the required force at the time of lifting the rear part of the electric wheelchair 1 can be made small, and the handling property by an assistant can be improved more.

The perspective view seen from the left diagonal front which shows one Embodiment of the electric wheelchair which concerns on this invention. The perspective view which looked at the electric wheelchair from the diagonally left rear. The top view of an electric wheelchair. The left view of an electric wheelchair. The front view of an electric wheelchair. The rear view of an electric wheelchair. The left view which shows the state in which the user sat on the electric wheelchair. The left view which shows the effect | action of an electric wheelchair. The side view which shows the solenoid as a tilt actuator, the solenoid as a boarding / exiting position locking means, and an expansion | extension control means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric wheelchair 2 Chair part 2a Traveling position 2b Boarding / alighting position 3 Seating part 4 Backrest part 5 Armrest part 7 Footrest 7a Traveling position 7b Boarding position 7c Free position 9 Front wheel 10 Rear wheel 10a Traveling position 10b Boarding / alighting position 11 Electric motor 15 Wheel cover 18 Battery 28 Steering handle 29 Accelerator lever 47 Footrest lifting / lowering device 60 Suspension device 61 Solenoid 62 as locking / unloading position locking means Solenoid as expansion restriction means

Claims (4)

A chair part having a seat part and a backrest part that rises upward from the rear end part of the seat part, a footrest for a footrest arranged at the front lower part of the chair part, and an electric part arranged on the left and right sides of the lower part of the front part of the chair part A front wheel driven by a motor, a tilt arm mounted on a tilt shaft , disposed on both left and right sides of the lower portion of the chair portion , a steerable rear wheel provided at the other end of the tilt arm , the chair portion, and the above A suspension device including a tilt actuator that holds the rear wheel so as to be swingable up and down with respect to the chair portion between a tilt arm, a travel position where the footrest is separated from the ground, and a getting-on / off position in contact with the ground and a footrest lifting device provided with a footrest actuator which allows lifting between, disposing the front axle to the front end below the chair portion one , The tilt actuator of the suspension device, passenger rear of the chair portion of the front wheel axle is moved up and down as the pivot center and displaceable chair portion on the traveling position and the landing position, and, from the running position of the chair parts In the case of displacement to the position, the footrest lifting device first displaces the footrest from the traveling position to the boarding / alighting position in contact with the ground, and then the suspension device displaces the chair part from the traveling position to the boarding / alighting position. When displacing from the boarding / exiting position to the running position, the suspension device first controls the chair portion to move from the boarding / exiting position to the running position, and then the footrest lifting device controls the footrest to move from the boarding / exiting position contacting the ground to the running position. further, the suspension strokes of the suspension device, suspension Electric wheelchair, characterized in that the rear part of the chair portion when maximum extension of the device is provided with a landing position locking means for locking in passenger position anteversion is pushed up by the chair portion upward. Elongation restriction means is provided to prevent the suspension stroke of the suspension device from extending beyond the suspension stroke required when the electric wheelchair is running, and the suspension stroke of the suspension device is regulated by the extension restriction means when the footrest is in the running position. The electric wheelchair according to claim 1 controlled to be performed. The footrest has a front-rear direction position at the boarding / alighting position in front of the ground contact point of the front wheel, and the footrest and the footrest actuator when the footrest moves to the maximum extension state at the boarding / alighting position in contact with the ground. 3. The electric wheelchair according to claim 1, further comprising an idle section that absorbs the movement between them and displaces the chair portion from the running position to the getting on / off position. 2. The electric wheelchair according to claim 1 , wherein a battery for supplying electric power to the electric motor is disposed at a position closest to the front under the seating portion and in the vicinity of an upper part of an axle of the front wheel in a side view.

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