JP2020069255A - Electric vehicle - Google Patents

Abstract

To provide an electric vehicle capable of efficiently being used in a folded state and enhancing convenience of the electric vehicle.SOLUTION: An electric vehicle of the invention comprises: movable bases 1, 201, 301 having a front wheel 11 and a rear wheel 12; seats 2, 302 including a seat part 21 that has a seat face 21a; and a detection device 8 capable of detecting the positions of the seats 2, 302. The movable bases 1, 201, 301 enable a wheel base H to enlarge and shrink. The seats 2, 302 can move between a seated position in which the seat face 21a faces upward and a retreat position in which the seat part 21 retreats forward from the seated position. When movement of the seats 2, 302 in the seated position is detected by the detection device 8, the movable bases 1, 201, 301 start to shrink the wheel base H. When movement of the seats 2, 302 in the retreat position is detected by the detection device 8, the movable bases 1, 201, 301 start to enlarge the wheel base H.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric vehicle including a moving base having front wheels and rear wheels, and a seat arranged on the moving base.

  BACKGROUND ART Electric vehicles such as electric wheelchairs and electric carts, which can be driven by driving means such as motors, have become popular as means for moving users such as elderly people and persons requiring care. Such an electric vehicle is sometimes called a “senior car”. Typically, an electric vehicle includes a moving base configured to be able to travel by electric drive, and a seat having a seating portion and arranged on the moving base, and a user is seated on the seat of the electric vehicle. You can move while sitting on the section.

  The electric vehicle may be configured to be foldable. Specifically, the electric vehicle has a moving base so as to allow a user to ride on the vehicle and stability during traveling. It may be configured to be changeable between a deployed state in which it is expanded in the front-rear direction and a folded state in which the moving base is contracted in the front-rear direction so as to be suitable for moving the electric vehicle from the rear by hand. Various techniques have been proposed to make a moving base of a vehicle such as an electric vehicle or an engine-driven vehicle, that is, a vehicle body, foldable.

  As an example of a technique for making a vehicle body foldable, a vehicle body having a front frame having front wheels and a rear frame having rear wheels and a seat is provided, and the seat is fixed at a fixed position with respect to the rear frame. Then, there is a technique in which the front frame and the rear frame can be moved in the front-rear direction with respect to each other so that the vehicle body can be expanded and contracted in the front-rear direction.

JP, 2001-048497, A

  However, even if an example of the above technique for making the vehicle body foldable is applied to an electric vehicle such as an electric wheelchair or an electric cart, the moving base of the electric vehicle merely expands and contracts in the front-rear direction. The seat of such an electric vehicle always occupies a wide area in the electric vehicle in a deployed state in which the moving base is expanded in the front-rear direction and a folded state in which the moving base is contracted in the front-rear direction so that the user can stably sit. It will be. When using such an electric vehicle in a folded state, the seat is often an obstacle. That is, the electric vehicle cannot be used efficiently in the folded state. Therefore, such an electric vehicle cannot be used efficiently in the folded state, and the electric vehicle becomes less convenient.

  In consideration of the above situation, it is desired that the electric vehicle can be efficiently used in the folded state and the convenience is improved.

  In order to solve the problems described above, an electric vehicle according to one aspect is configured to be electrically drivable, and includes a moving base having front wheels and rear wheels, a seat including a seating portion having a seating surface, and the seat. And a detecting device configured to detect the position of the seat, the moving base being configured to be changeable so as to enlarge and reduce a wheel base between the front wheel and the rear wheel, and the seat. Is configured such that the seating portion is movable between a seating position in which the seating surface is arranged so that the seating surface faces upward and a retracted position in which the seating portion is retracted forward from the seating position. The moving base is configured to start a change for reducing the wheel base when the detecting device detects that the certain sheet has moved, and is in the retracted position. That serial sheet is moved upon detection by said detection device, said mobile base is configured to initiate a change in order to enlarge the wheel base.

  According to the electric vehicle according to the aspect, the electric vehicle can be efficiently used in the folded state, and the convenience of the electric vehicle can be improved.

FIG. 1 is a front perspective view schematically showing the electric vehicle according to the first embodiment in a developed state. FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a sectional view taken along the line BB of FIG. FIG. 4 is a rear perspective view schematically showing the electric vehicle equipped with the basket in the deployed state in the first embodiment. FIG. 5 is a left side view schematically showing the electric vehicle equipped with the basket in the deployed state in the first embodiment. FIG. 6 is a left side view schematically showing a state in which the electric vehicle equipped with the basket is being moved between the unfolded state and the folded state in the first embodiment. FIG. 7 is a left side view schematically showing the electric vehicle equipped with the basket in the folded state in the first embodiment. FIG. 8 is a front perspective view schematically showing the electric vehicle equipped with the basket in the folded state in the first embodiment. FIG. 9 is a front perspective view schematically showing the seat in the seated state and the back plate in the standing state in the electric vehicle according to the third embodiment. FIG. 10 is a front perspective view schematically showing the seat in the retracted state and the back plate in the collapsed state in the electric vehicle according to the third embodiment. FIG. 11 is a left side view schematically showing the movement base in the enlarged state in the electric vehicle according to the fourth embodiment. FIG. 12 is a left side view schematically showing the moving base in the contracted state in the electric vehicle according to the fourth embodiment. FIG. 13 is a right side view schematically showing the electric vehicle according to the fifth embodiment in a deployed state. FIG. 14 is a front perspective view schematically showing a moving base of an electric vehicle and a peripheral portion thereof according to the fifth embodiment. FIG. 15 is a rear perspective view schematically showing a state in which the electric vehicle equipped with the basket is being moved between the unfolded state and the folded state in the fifth embodiment. FIG. 16 is a right side view schematically showing the electric vehicle according to the fifth embodiment in a state where the electric vehicle is transitioning between the unfolded state and the folded state. FIG. 17 is a right side view schematically showing the electric vehicle according to the fifth embodiment in a folded state.

  The moving body according to the first to fifth embodiments will be described below. Such a moving body may be a one-seater, and further, the moving body may be configured to open a seat installed therein to the outside of the moving body. For example, the moving body may be a wheelchair, a cart or the like, and in particular, the moving body may be a one-seater wheelchair, a one-seater cart or the like. However, the moving body is not limited to these configurations.

  Further, the moving body may be an electric vehicle configured to be able to travel by electric drive, and in each embodiment, a case where the moving body is an electric vehicle will be described. Specifically, the electric vehicle according to each embodiment is an electric cart, particularly a one-seater electric cart. However, the electric vehicle is not limited to this, and may be other than the electric cart. For example, the electric vehicle can be an electric wheelchair, in particular a one-seater electric wheelchair. Hereinafter, the electric vehicle will be simply referred to as “vehicle” as necessary.

  With respect to the drawings used to describe the present embodiment, in FIGS. 1, 2, and 4 to 17, the vehicle front and the vehicle rear are indicated by arrows F and R, respectively. That is, the vehicle front-rear direction is indicated by arrows F and R. In FIG. 1, FIG. 3, FIG. 4, FIG. 8 to FIG. 10, FIG. 14, and FIG. 1 to 17, the vehicle upper side and the vehicle lower side are indicated by an arrow U and an arrow L, respectively. That is, the vertical direction of the vehicle is indicated by the arrow U and the arrow L.

"First embodiment"
The electric vehicle according to the first embodiment will be described with reference to FIGS. 1 to 8.

"About the outline of electric vehicles"
An outline of the electric vehicle according to the present embodiment will be described. As shown in FIGS. 1 to 4, the vehicle has a moving base 1 configured to be able to travel by electric drive. The vehicle has one seat 2 arranged on a moving base 1. In particular, the seat 2 is for one passenger. However, the vehicle seat is not limited to this. As shown in FIGS. 1, 2 and 4, the vehicle has a frame 3 located on the moving base 1 and behind the seat 2 with respect to the seat 2.

  The vehicle has a back plate 4 configured to be used as a backrest of a user who rides on the vehicle. The back plate 4 is arranged on the moving base 1. The vehicle has two armrests 5 located on both sides of the seat 2 in the seat width direction. The seat width direction is substantially the same as the vehicle width direction. Each armrest 5 is also arranged on the moving base 1. However, the vehicle may have an armrest in at least one of the seat width directions with respect to the seat.

  As shown in FIGS. 1 and 4, the vehicle has a front operating device 6 and a rear operating device 7 configured to be operable. The rear operating device 7 is arranged rearward of the vehicle with respect to the front operating device 6. Each of the front and rear operation devices 6 and 7 is operated by a user, an assistant, or the like to drive the vehicle to travel, an operation to steer the vehicle, an operation to adjust the speed of the vehicle, and a vehicle braking. It is configured to be able to perform an operation for doing so. Although not specifically shown in the drawings, each of the front and rear operation devices 6 and 7 may include a joystick, a touch panel, a steering wheel, and the like configured to allow the vehicle to be operated. As shown in FIGS. 2 and 4, the vehicle has a detection device 8 configured to detect the position of the seat 2.

  As shown in FIGS. 1 to 4, in such an electrically powered vehicle, the moving base 1 has two front wheels 11 and two rear wheels 12 that are located at a distance from the front wheels 11 behind the vehicle. The front wheels 11 and the rear wheels 12 are traveling wheels of the vehicle. However, the moving base may have at least one front wheel and two or more rear wheels, or may have two or more front wheels and at least one rear wheel.

  As shown in FIGS. 1, 2, and 4, the moving base 1 also includes a front base 13 having the front wheel 11 and a rear base 14 having the rear wheel 12. The rear base 14 is arranged rearward of the vehicle with respect to the front base 13. As shown in FIGS. 1 and 5 to 8, the moving base 1 is configured to be changeable so as to enlarge and reduce the wheel base H between the front wheels 11 and the rear wheels 12. In other words, the front and rear bases 13 and 14 of the moving base 1 are configured to be movable relative to each other so that the wheel base H can be expanded and contracted.

  Due to the relative movement of the front and rear bases 13 and 14, the moving base 1 is moved between the enlarged state in which the wheel base H is enlarged and the reduced state in which the wheel base H is reduced to be shorter than the enlarged state. Can change. Further, in the moving base 1, the rear wheels 12 are driven and the front wheels 11 are stopped in order to enlarge and reduce the wheel base H. That is, when the wheel base H is enlarged, the rear wheels 12 are rotationally driven so as to move the rear base 14 to the rear of the vehicle, and the front wheels 11 are stopped so that the front base 13 is held at a fixed position. Further, when the wheel base H is reduced, the rear wheels 12 are rotationally driven so as to move the rear base 14 to the front of the vehicle, and the front wheels 11 are stopped so as to keep the front base 13 at a fixed position. However, the moving base may be configured such that the front wheels are driven and the rear wheels are stopped to expand and contract the wheel base.

  As shown in FIGS. 1 to 4, the seat 2 includes a seat portion 21 having a seat surface 21 a and two leg portions 22 capable of supporting the seat portion 21. The two leg portions 22 are arranged so as to be spaced from each other in the seat width direction. However, the seat can also be configured to have at least one leg.

  As shown in FIGS. 1 and 5 to 8, the seat 2 is attached to the moving base 1 so as to be movable according to the expansion and contraction of the wheel base H. In the seat 2, the seating portion 21 is moved forward by the movement of the leg portion 22 accompanying the relative movement of the front and rear bases 13 and 14 in the vehicle front-rear direction for reducing the wheel base H. It is configured. The seating portion 21 is also configured to move rearward by the movement of the leg portion 22 accompanying the relative movement of the front and rear bases 13 and 14 in the vehicle longitudinal direction for enlarging the wheel base H.

  Further, the seat 2 is configured to be movable between a seating position in which the seating portion 21 is arranged so that the seating surface 21a faces upward of the vehicle and a retracted position in which the seating portion 21 is retracted from the seating position to the front of the vehicle. ing. The seating portion 21 is arranged at the seating position in the expanded state of the moving base 1. Further, the seating portion 21 is arranged at the retracted position when the moving base 1 is in the contracted state.

  As shown in FIGS. 2 and 3, the leg portion 22 has a base attachment area 22 a configured to attach the leg portion 22 to the front base 13 so as to be pivotable with respect to the front base 13. As shown in FIGS. 1 and 5 to 8, the vehicle front side movement of the seating portion 21 is accompanied by the relative vehicle longitudinal movement of the front and rear bases 13 and 14 for reducing the wheel base H. This is caused by the vehicle rearward movement of the base attachment area 22a of the leg portion 22 and the vehicle frontward turning of the leg portion 22. The seat portion 21 can be moved from the seated position to the retracted position by moving the seat front side.

  Then, the relative movement of the front and rear bases 13 and 14 in the vehicle front-rear direction for enlarging the wheel base H causes the vehicle front side movement of the base mounting area 22a of the leg 22 and the vehicle rear side of the leg 22. A turn is brought about, which leads to a rearward movement of the seat 21 in the vehicle. The seat portion 21 can be moved from the retracted position to the seated position by moving the vehicle rear side.

  As shown in FIGS. 1, 2, and 4, the frame 3 is arranged so as to be adjacent to the rear of the vehicle with respect to the seat portion 21 in the seated position. The frame 3 is also configured to support the seating portion 21 in the seated position in the expanded state of the moving base 1.

  The back plate 4 is configured to be movable between an upright position located rearward and upward of the vehicle with respect to the seating portion 21 when in the seated position, and a lying position located forward of the vehicle with respect to the upright position. Has been done. As shown in FIGS. 7 and 8, the seating portion 21 in the retracted position is configured to support the back plate 4 in the lying position. Further, as shown in FIG. 2, the back plate 4 is attached to the frame 3 so as to be rotatable between an upright position and a lying position.

  The front operating device 6 is supported by one of the two armrests 5. However, the front operating device may be supported by both of the two armrests. The rear operation device 7 is arranged rearward of the vehicle with respect to the back plate 4 in the standing position. The front operation device 6 can operate the vehicle with the seat 21 and the back plate 4 in the seated position and the standing position, respectively. The rear operation device 7 can operate the vehicle with the seat 21 and the back plate 4 in the retracted position and the fall position, respectively.

  As shown in FIG. 1 and FIG. 5 to FIG. 8, when the detection device 8 detects that the seat 2 at the seating position has moved, the vehicle has a change for reducing the wheel base H by the movement base 1. Is configured to start. The vehicle is configured such that when the detection device 8 detects that the seat in the retracted position has moved, the moving base 1 starts a change for enlarging the wheel base H.

  As shown in FIGS. 1, 2 and 4 to 8, the detection device 8 corresponds to the first sensor 8a arranged so as to correspond to the seat 2 in the sitting position and the seat 2 in the retracted position. And a second sensor 8b arranged so that However, if the seat is moveable in response to the wheelbase expansion and contraction, the first sensor can detect that the traveled base in the expanded state has initiated a change to reduce the wheelbase. It may be arranged. The second sensor may also be arranged to detect that the moving base in the contracted state has initiated a change to enlarge the wheel base. Further, the detection device may have one sensor configured to be able to detect both the movement start of the seat at the seating position and the movement start of the seat at the retracted position.

  As shown in FIGS. 1 and 5 to 8, the vehicle is in the deployed state when the moving base 1 is in the expanded state and the seat 2 is in the seated position. In the deployed state, the vehicle can travel by operating the front operating device 6 while the user is on board. In the unfolded state, the vehicle can travel by operating the rear operation device 7 with the user, the assistant, etc. being located behind the vehicle. In the unfolded state, the vehicle can be driven by pushing the vehicle by a user, an assistant, etc. located behind the vehicle. In the deployed state, such a vehicle can be used as a wheelchair, a cart, or the like.

  The vehicle is in the folded state when the moving base 1 is in the contracted state and the seat is in the retracted position. In the folded state, the vehicle can travel by operating the rear operation device 7 with the user positioned behind the vehicle. In addition, in the folded state, the vehicle can travel even when the user pushes the vehicle in a state of being positioned behind the vehicle. In the folded state, such a vehicle can be used as a walking assistance vehicle, a shopping cart, a cart, or the like.

"For more information on moving bases"
In detail, the moving base 1 may be configured as follows. As shown in FIGS. 5 to 7, the front and rear bases 13 and 14 of the moving base 1 are slidable substantially linearly in the vehicle longitudinal direction relative to each other. In particular, the difference in length of the wheel base H between the expanded state and the contracted state of the moving base is preferably not less than half and not more than the maximum length of the seat 2 in the seat front-rear direction. In this case, the vehicle can travel stably in a deployed state in which the moving base 1 is in an expanded state, while stably supporting the boarding user, and the vehicle is in a folded state in which the moving base is in a contracted state. In addition, it becomes compact and can make small turns.

  As shown in FIGS. 1 and 3, the front base 13 of the moving base 1 has two front side members 13a which are spaced from each other in the vehicle width direction. The two front wheels 11 are attached to the front end portions of the two front side members 13a in the vehicle front-rear direction so as to be rotatable about a rotation axis 11a extending in the vehicle width direction.

  Although not specifically shown, the front base 13 is equipped with a braking device configured to enable braking of the two front wheels 11. For example, the braking device can have a solenoid lock mechanism adjacent to each front wheel 11 in the vehicle width direction. The solenoid lock mechanism has a mover that can be linearly advanced and retracted, and the mover can be configured to be movable between a forward position where it is locked to the front wheel 11 and a backward position where it is separated from the front wheel 11. .. However, the braking device is not limited to this.

  As shown in FIGS. 1 to 3, the front base 13 also has a front cross member 13b extending in the vehicle width direction so as to connect the front ends of the two front side members 13a. The front side base 13 has a front side plate 13c extending in the vehicle width direction so as to connect the lower surfaces of the two front side members 13a. A battery 15 that is a power supply source of the vehicle and a control device 16 for electrically controlling the vehicle are mounted on the front base 13. The battery 15 and the control device 16 are arranged between the two front side members 13a in the vehicle width direction, and are arranged rearward of the vehicle with respect to the front cross member 13b. The battery 15 and the control device 16 are mounted on the front plate 13c.

  As shown in FIGS. 1 and 3, the rear base 14 of the moving base 1 has two rear side members 14a which are arranged at intervals in the vehicle width direction. The two rear wheels 12 are attached to the rear end portions of the two rear side members 14a in the vehicle front-rear direction so as to be rotatable about a rotation axis 12a extending in the vehicle width direction. Although not specifically illustrated, the rear base 14 has a drive motor for rotationally driving each rear wheel 12. For example, the drive motor may be disposed so as to be adjacent to each rear wheel 12 in the vehicle width direction, or the drive motor may be incorporated in each rear wheel 12. However, the drive motor is not limited to this.

  The battery 15, the control device 16, and the drive motor are electrically connected to each other. Further, the control device 16 is electrically connected to the detection device 8, particularly the first and second sensors 8a and 8b of the detection device 8.

  As shown in FIGS. 1 and 4, each rear side member 14a has a guide portion 14b formed so as to project outward from the rear side member 14a in the vehicle width direction. The guide portion 14b extends substantially linearly in the vehicle front-rear direction. The front end of the guide portion 14b in the vehicle front-rear direction is positioned so as to substantially coincide with the front end of the rear side member 14a in the vehicle front-rear direction. The rear end of the guide portion 14b in the vehicle front-rear direction is located near the rear wheel 12.

  As shown in FIG. 2, a guide elongated hole 14c is formed in each rear side member 14a so as to penetrate the rear side member 14a in the vehicle width direction. The guide elongated hole 14c extends in a substantially straight line in the vehicle front-rear direction. The guide elongated hole 14c extends substantially parallel to the guide portion 14b.

  As shown in FIGS. 1 to 4, the moving base 1 includes a base guide 17 configured to guide the front base 13 to move in the vehicle front-rear direction with respect to the rear base 14. Specifically, the moving base 1 has two base guides 17, and these two base guides 17 are attached to the rear end portions of the two front side members 13a in the vehicle front-rear direction.

  As shown in FIG. 3, each base guide 17 is formed in a substantially U shape that opens toward the center in the vehicle width direction. Each base guide 17 has a base portion 17a located on the outer side in the vehicle width direction, and upper and lower arm portions 17b and 17c extending from the base portion 17a toward the center in the vehicle width direction. The upper arm portion 17b is arranged below the vehicle with respect to the lower arm portion 17c with a space therebetween.

  In each base guide 17, the base 17a is attached to the rear end of the front side member 13a. Further, the base guide 17 moves along the guide portion 14b of the rear side member 14a when the front base 13 moves in the vehicle front-rear direction with respect to the rear base 14. More specifically, the upper arm portion 17b of the base guide 17 slides in the guide elongated hole 17c in the vehicle longitudinal direction, and the lower arm portion 17c slides in the vehicle longitudinal direction along the lower side of the guide. ..

  As shown in FIG. 5, the base guide 17 is located at the front end portion of the rear side member 14a in the vehicle front-rear direction in the expanded state of the moving base 1. As shown in FIG. 7, the base guide 17 is located near the rear wheel 12 when the moving base 1 is in the contracted state. More specifically, when the moving base 1 is in the contracted state, the base guide 17 is located in front of the rear wheel 12 so as to be closest to the rear wheel 12 while preventing contact with the rear wheel 12.

  As shown in FIGS. 1, 2 and 4, the rear base 14 has a shelf plate 18 configured so that the basket K (shown in FIG. 4) can be mounted on the vehicle. The shelf board 18 bridges the two rear side members 14a and is supported by the two rear side members 14a. The shelf plate 18 is disposed above the vehicle with respect to the two rear side members 14a.

"Details of the seat"
Specifically, the seat 2 may be configured as follows. As shown in FIG. 5, the seat 2 is arranged such that the seating surface 21a of the seating portion 21 is substantially along the vehicle horizontal direction in the seated position. Further, the seating portion 21 is located at a position above the shelf board 18 with a space in the vehicle vertical direction with respect to the shelf board 18 in the seated position. A luggage storage space S is formed between the shelf plate 18 and the seat 21 so that the basket K can be stored therein.

  The seat 2 is also arranged such that, in the retracted position, the seating surface 21a of the seating portion 21 is oriented at a predetermined angle with respect to a plane extending in the vehicle vertical direction and the vehicle width direction. Such an angle is preferably about 30 ° or less in absolute value. However, the angle of the seating surface is not limited to this. Further, the seating portion 21 is arranged in front of the vehicle with respect to the shelf board 18 while maintaining the luggage storage space S in the retracted position.

  As shown in FIGS. 6 and 7, the rear end of the seat 21 in the seat front-rear direction is a free end. The seat front-rear direction is a direction that is substantially orthogonal to the seat width direction and extends between the front surface and the back surface of the seat portion 21.

  As shown in FIGS. 1 to 4, the seating portion 21 has two seat side members 23 that are spaced from each other in the seat width direction. The two seat side members 23 are located so as to correspond to the two leg portions 22 in the seat width direction. The two seat side members 23 are also located below the seating surface 21a in the seat up-down direction. The seat up-down direction is a direction substantially orthogonal to the seat front-rear direction and the seat width direction. Each seat side member 23 extends in the seat front-rear direction.

  As shown in FIGS. 7 and 8, the seat 2 has a back plate support mechanism 24 configured to support the back plate 4 when the seat 2 and the back plate 4 are in the retracted position and the fall position, respectively. .. The back plate support mechanism 24 is formed so as to protrude downward from the seat side members 23 in the seat vertical direction.

  The seating portion 21 has a partition area 21b extending between the back plate support mechanism 24 and the rear end of the seat side member 23 in the seat front-rear direction. With the seat 2 and the backboard 4 in the retracted position and the lying position, respectively, the partition area 21b projects upward from the backboard 4 and the partition area 21b serves as a partition for the luggage placed on the backboard 4. Can function.

  The seating portion 21 has a handle hole 21c that penetrates the rear end region of the seat in the seat front-rear direction in the seat up-down direction. The handle hole 21c has an elongated shape extending in the seat width direction. The user can grasp the rear end area of the seat 21 with his / her finger inserted into the handle hole 21c.

  As shown in FIGS. 1 to 3, the two leg portions 22 extend downward from the seat portion 21 in the seat vertical direction. More specifically, the two leg portions 22 extend downward from the two seat side members 23 in the seat up-down direction. The base attachment area 22a of each leg 22 is located at the lower end of the leg 22 in the seat vertical direction.

  As shown in FIG. 2, the base attachment area 22a has a turning shaft 22b extending in the vehicle width direction. The base attachment area 22a is attached to the front side member 13a by using the turning shaft 22b so that the leg portion 22 can turn about the turning shaft 22b with respect to the front side member 13a. More specifically, the base attachment area 22a may be attached to the base guide 17.

  The turning shaft 22b is attached to the upper arm portion 17c of the base guide 17 inserted into the elongated guide hole 14c of the rear side member 14a. When the front base 13 moves in the vehicle front-rear direction with respect to the rear base 14, the turning shaft 22b moves in the guide elongated hole 14c in the vehicle front-rear direction.

  As shown in FIGS. 1 to 4, the seat 2 has a link member 25 configured to interlock the relative movement of the front and rear bases 13 and 14 in the vehicle front-rear direction with the movement of the seat 2. .. Specifically, the sheet 2 has two link members 25.

  The link member 25 has a base side attachment portion 25a attached to the rear side member 14a of the rear base 14. The base side attachment portion 25a is attached to the rear side member 14a so as to be able to turn around the turning axis 25b extending in the vehicle width direction with respect to the rear side member 14a. The base-side mounting portion 25a is located in front of the vehicle with respect to the base mounting area 22a of the leg portion 22. The base side attachment portion 25a is attached to the front end portion of the rear side member 14a in the vehicle front-rear direction.

  The link member 25 also has a seat side attachment portion 25c attached to the leg portion 22 of the seat 2. The seat-side mounting portion 25c is arranged with a space from the base-side mounting portion 25a. The seat side attachment portion 25c is attached to the leg portion 22 so as to be able to turn with respect to the leg portion 22 about a turning axis 25d extending in the vehicle width direction. More specifically, the seat side attachment portion 25c is attached to an intermediate portion of the leg portion 22 in the seat vertical direction.

  As shown in FIGS. 5 to 7, due to the movement of the seating portion 21 on the vehicle front side, the base attachment area 22 a of the leg portion 22 is rearward of the vehicle along with the movement of the front base 13 on the vehicle rear side with respect to the rear base 14. When moving to the side, the link member 25 promotes the turning of the leg portion 22 on the vehicle front side. Further, when the seating portion 21 moves to the vehicle rear side, when the base mounting area 22a of the leg portion 22 moves to the vehicle front side as the front base 13 moves to the vehicle front side with respect to the rear base 14, the link member moves. The reference numeral 25 is designed to promote the turning of the leg portion 22 toward the vehicle rear side.

"About frame details"
In detail, the frame 3 may be configured as follows. As shown in FIGS. 1, 2, and 4, the frame 3 is arranged so as to be adjacent to the seat 2 at the vehicle rear side with respect to the seat 2. The frame 3 has two columns 31 arranged at intervals in the vehicle width direction. The two columns 31 are arranged so as to correspond to the two rear side members 14a of the rear base 14 in the vehicle width direction. The two columns 31 are also arranged so as to correspond to the two seat side members 23 in the seating portion 21 of the seat 2 in the vehicle width direction. Each pillar 31 is arranged along the up-down direction of the vehicle. A lower end portion of the pillar 31 in the vehicle vertical direction is attached to a rear end portion of the rear side member 14a in the vehicle front-rear direction.

  The frame 3 has a seat support mechanism 32 configured to be able to support the rear end of the seat portion 21 of the seat 2 in the seated position. More specifically, the frame 3 has two seat support mechanisms 32 that are respectively arranged at intermediate portions of the two columns 31 in the vehicle vertical direction. The two support mechanisms 32 respectively support the rear ends of the two seat side members 23 of the seating portion 21 in the seat front-rear direction. Further, the seat support mechanism 32 can be formed so as to project from the middle portion of the support column 31 toward the front of the vehicle. In this case, the seat support mechanism 32 supports the rear end of the seat 21 from the lower side of the vehicle toward the upper side of the vehicle.

  The frame 3 has a connecting member 33 extending in the vehicle width direction so as to connect the upper ends of the two columns 31 in the vehicle vertical direction. With the back plate 4 in the upright position, the connecting member 33 is located rearward of the vehicle with respect to the back plate 4 so as to contact the back plate 4. The rear operating device 7 is attached to the connecting member 33.

"Details of the backboard"
In detail, the back plate 4 may be configured as follows. As shown in FIG. 5, the back plate 4 is arranged along a plane extending in the vehicle width direction and the vehicle vertical direction in the standing position. The back plate 4 is also arranged along the horizontal direction of the vehicle in the lying position. The back plate 4 is located at a position above the shelf plate 18 with a space in the vehicle vertical direction with respect to the shelf plate 18 in the state of being in the lying position. A luggage storage space S that allows the basket K to be stored is maintained between the back plate 4 and the shelf plate 18.

  As shown in FIGS. 1, 2 and 4, the back plate 4 is formed in a substantially flat plate shape. The back plate 4 has a base end portion 4a and a front end portion 4b located at the lower end side and the upper end side in the vehicle up-down direction, respectively, in the standing position. The base end portion 4a of the back plate 4 is attached to the two columns 31 of the frame 3 so that the back plate 4 can turn about a turning axis 3c extending in the vehicle width direction. More specifically, the base end portion 4a of the back plate 4 is attached to an intermediate portion of the two columns 31 in the vehicle vertical direction. The base end portion 4a of the back plate 4 is located above the vehicle with respect to the seat support mechanism 32 of the column 31 of the frame 3.

  The tip portion 4b of the back plate 4 is a free end. The tip portion 4b of the back plate 4 can be turned around the turning axis 4c between the standing position and the fall position. Further, with the seat 2 in the retracted position and the back plate 4 in the lying position, the front end portion 4b of the back plate 4 is supported by the back plate support mechanism 24 of the leg portion 22 of the seat 2.

"Details of armrests"
Specifically, the armrest 5 may be configured as follows. As shown in FIGS. 1, 2, and 4, the armrest 5 is formed so as to extend in the vehicle front-rear direction. The armrest 5 is located above the seat 21 of the seat 2 with a space above the vehicle. The two armrests 5 are attached to the two columns 31 of the frame 3, respectively. More specifically, the rear end portion of the armrest 5 in the vehicle front-rear direction is attached to the middle portion of the column 31 in the vehicle vertical direction.

  The rear end of the armrest 5 is located above the vehicle with respect to the seat support mechanism 32 of the column 31 and the base end 4a of the back plate 4. One of the two armrests 5 has a front mounting portion 51 for mounting the front operating device 6. The front attachment portion 51 is attached to a front end portion of one of the two armrests in the vehicle front-rear direction.

"Details of the detector"
The detection device 8 is preferably configured as follows in detail. As shown in FIG. 2, the first sensor 8a of the detection device 8 may be a position sensor 8a arranged in the seat support mechanism 32 of the frame 3. The first sensor 8a may be configured to be able to detect the position of the rear end of the seat portion 21 of the seat 2 in the seated position, particularly the position of the rear end of the seat side member 23 of the seat portion 21.

  However, the first sensor is not limited to this. For example, the first sensor can be an angle sensor located in the base mounting area of the leg. Also, if the first sensor is arranged to detect that the moving base in the expanded state has initiated a change to reduce the wheelbase, for example, the first sensor may move in the expanded state. In order to detect the position of the base guide of the front base in the base, it can be arranged at the front end of the rear base in the vehicle front-rear direction. Further, the first sensor may be a contact switch.

  The second sensor 8b of the detection device 8 may be a position sensor 8b arranged at the front end of the rear base 14 of the moving base 1 in the vehicle front-rear direction. The second sensor 8b may be configured to be able to detect the position of the upper end of the leg portion 22 of the seat 2 in the retracted position.

  However, the second sensor is not limited to this. For example, the second sensor can be an angle sensor located in the base mounting area of the leg. Also, if the second sensor is arranged to detect that the moving base in the contracted state has initiated a change to enlarge the wheel base, for example, the second sensor may move in the contracted state. In order to detect the position of the base guide of the front base in the base, the rear base can be arranged in front of the vehicle with respect to the rear wheels at the rear end portion in the vehicle front-rear direction. Further, the second sensor may be a contact switch.

  When the detection device has one sensor configured to be able to detect both the movement start of the seat at the seating position and the movement start of the seat at the retracted position, the one sensor is It may be an angle sensor arranged in the base mounting area of the part.

"About an example of vehicle deformation operation"
An example of the deformation operation of the vehicle according to the present embodiment will be described. First, the operation of deforming the vehicle from the deployed state to the folded state will be described. In the deployed state of the vehicle, the moving base 1 is in the expanded state and the seat 2 is in the seated position. When the user manually starts the movement of the seat 2 from the seated position to the retracted position, the detection device 8, particularly the first sensor 8a, detects the start of movement of the seat 2 from the seated position. The detection of the detection device 8 is transmitted to the control device 16.

  The control device 16 moves the front and rear bases 13 and 14 relative to each other in the vehicle front-rear direction so as to reduce the wheel base H in order to change the moving base 1 from the enlarged state to the contracted state. Specifically, for example, the control device 16 controls the braking device to stop the front wheels 11 and the drive motor to drive the rear wheels 12 in order to reduce the wheel base H. Such relative movement of the front and rear bases 13 and 14 is stopped when the movable base 1 is in the contracted state.

  Next, the operation of the vehicle deforming from the folded state to the deployed state will be described. In the folded state of the vehicle, the moving base 1 is in the contracted state and the seat 2 is in the retracted position. When the user manually starts moving the seat 2 from the retracted position toward the seated position, the detection device 8, particularly the second sensor 8b, detects the start of movement of the seat 2 from the retracted position. The detection of the detection device 8 is transmitted to the control device 16.

  The control device 16 moves the front and rear bases 13 and 14 relative to each other in the vehicle longitudinal direction so as to enlarge the wheel base H so as to change the moving base 1 from the contracted state to the enlarged state. Specifically, for example, the control device 16 controls the braking device so as to stop the front wheels 11 and the drive motor so as to drive the rear wheels 12 in order to enlarge the wheel base H. Such relative movement of the front and rear bases 13 and 14 is stopped when the movable base 1 is in the expanded state.

  As described above, the moving body according to one aspect of the present embodiment is a moving base including the front base 13 having the front wheels 11, and the rear base 14 having the rear wheels arranged behind the vehicle with respect to the front base 13. 1 and a seat portion 21 having a seating surface 21a, and a seat 2 including a leg portion 22 supporting the seat portion 21 and arranged on the moving base 1, the front and rear bases 13 and 14 are , The front and rear bases for reducing the wheel base H are movable relative to each other so that the wheel base H between the front wheels 11 and the rear wheels 12 can be enlarged and reduced. The legs 22 can be moved forward by the movement of the legs 22 associated with the relative forward and backward movements of the front and rear bases 13, 14 for enlarging the wheel base H. It is movable rearwardly by the movement of the legs 22 associated with the movement back and forth.

  In such a moving body, the moving base 1 is in an expanded state in which the wheel base H is enlarged so that the moving body can travel stably, and in a contracted state in which the wheel base H is contracted so that the moving body can make a small turn. The front and rear bases 13 and 14 are movable back and forth relative to each other so as to be variable. Then, when the movable base 1 changes from the contracted state to the expanded state, the seat portion 21 of the seat 2 is contracted by the movement of the leg portion 22 of the seat accompanying the forward movement of the front base 13. It is possible to move forward from the retracted position arranged in this state to the seated position arranged in the expanded state of the moving base 1. In the expanded state of the moving base 1, the seating portion 21 is stably maintained in a state of occupying a space inside the moving body (hereinafter, referred to as “seating space”), so that the user stably sits on the seating portion 21. be able to. Therefore, the deployed state of the moving body is such that the seating portion 21 of the seat 2 is at the sitting position so that the user can stably sit and the moving base 1 is in the expanded state so that the moving body can travel stably. Can be brought easily.

  On the other hand, when the movable base 1 changes from the expanded state to the contracted state, the seat portion 21 of the seat 2 is moved by the movement of the leg portion 22 of the seat 2 accompanying the rearward movement of the front base 13. It is possible to move forward from the seated position arranged in the expanded state to the retracted position arranged in the contracted state of the moving base 1. When the moving base 1 is in the contracted state, the seating portion 21 moves forward so as to retract from the sitting space, so that a luggage such as a shopping cart can be placed in the sitting space on the contracted moving base 1. it can. Therefore, the seated portion 21 is at the retracted position so that a space for loading can be secured, and the movable base 1 is in a contracted state so that the movable body can make a small turn, thereby easily bringing the folded state of the movable body. be able to. Moreover, the expanded state and the folded state of the moving body can be easily switched. Therefore, the moving body can be efficiently used as a walking assistance vehicle, a shopping cart, a cart, etc. in the folded state, and the convenience of the moving body can be enhanced.

  In the moving body according to one aspect of the present embodiment, the leg portion 22 of the seat 2 has a base attachment area 22a that is attached to the front base 13 so that the leg portion 22 can turn with respect to the front base 13. The forward movement of the seating portion 21 of the seat 2 is the backward movement and the leg portion of the base mounting area 22a of the leg portion 22 associated with the relative front and rear movement of the front and rear bases 13 and 14 for reducing the wheel base H. The base mounting area 22a of the leg 22 caused by the forward turning of the seat 22 and the rearward movement of the seating portion 21 is accompanied by the relative back and forth movement of the front and rear bases 13, 14 for enlarging the wheel base H. Forward movement and rearward turning of the legs 22.

  Therefore, since the change between the seated position and the retracted position of the seat 2 and the change between the expanded state and the contracted state of the moving base 1 can be linked, the seat 2 is set to the sitting position and the moving base 1 is expanded. It is possible to easily switch between the unfolded state of the moving body and the folded state of the moving body in which the seat 2 is in the retracted position and the moving base 1 is in the contracted state. Therefore, the convenience of the moving body can be improved.

  In the moving body according to one aspect of the present embodiment, the moving base 1 is in an enlarged state in which the wheel base H is enlarged and a state in which the wheel base H is enlarged by the relative front and rear movement of the front and rear bases 13 and 14. It is possible to change between the contracted state and the contracted state in which the contracted state is shortened. Therefore, when the moving base 1 is in the expanded state, the moving body can travel stably, and when the moving base 1 is in the contracted state, the moving body can make a small turn. Therefore, the convenience of the moving body can be improved.

  In the moving body according to one aspect of the present embodiment, the seating portion 21 of the seat 2 is configured such that the seating surface 21a faces forward when the moving base 1 is in the contracted state. Therefore, in the folded state of the moving body, the seating portion 21 can be efficiently arranged so as to avoid the seating space while standing upright with its seating surface 21a facing forward. Further, since the seating portion 21 is arranged in front of the seating space, the seating portion 21 can be used as a partition for a load placed in the seating space. Therefore, the moving body can be efficiently used even in the folded state, and the convenience of the moving body can be improved.

  The moving body according to one aspect of the present embodiment includes a frame 3 arranged behind the seat 2 on the rear side base 14, and the seating portion 21 of the seat 2 is a seating surface in the expanded state of the moving base 1. The frame 3 supports the seating portion 21 with the moving base 1 in an enlarged state, with 21 a facing upward. Therefore, since the seating portion 21 of the seat 2 can be stably supported by the frame 3 in the deployed state of the mobile body, the seating portion 21 can stably support the user even when the mobile body is running, and as a result, The moving body can be used stably even in the deployed state. Therefore, the convenience of the moving body can be improved.

  An electric vehicle according to another aspect of the present embodiment includes a moving base 1 configured to be able to travel by electric drive, and a seat 2 including a seating portion 21 having a seating surface 21 a and arranged on the moving base 1. And a back plate 4 configured to be used as a backrest corresponding to the seating portion 21 and arranged on the moving base 1, the seating portion 21 being arranged so that the seating surface 21a faces upward. The back plate 4 is movable between the sitting position and the retracted position in which the seat 21 is retracted forward from the seated position, and the back plate 4 stands up rearward and upward with respect to the seat 21 in the seated position. It is movable between a position and a lying position forward of the standing position, and the seating portion 21 in the retracted position supports the back plate 4 in the lying position.

  Therefore, when the seating portion 21 of the seat 2 is in the seating position, it can be stably maintained in a state of occupying the seating space in the electric vehicle, so that the user can stably seat on the seating portion 21. Further, when the back plate 4 is in the standing position, it is arranged in the standing position rearward and upward with respect to the sitting portion 21 in the sitting position, so that the user can lean on the back plate 4 in a stable manner. Then, when the seat portion 21 is in the seated position and the back plate 4 is in the upright position in this way, it is possible to bring the deployed state of the electric vehicle that allows the user to sit on the seat portion 21 of the seat 2. ..

  On the other hand, when the seating portion 21 is in the retracted position, it moves forward so as to retract from the seating space, and the seating portion 21 in the retracted position supports the back plate 4 in the collapsed position. In such a sitting space, luggage such as a shopping basket can be stably placed on the back plate 4. When the seating portion 21 is in the retracted position and the backboard 4 is in the lying position as described above, the folded state of the electric vehicle that enables the electric vehicle to be used as a walking assistance vehicle, a shopping cart, a dolly, etc. Can be brought. Therefore, the electric vehicle in the folded state can be efficiently used as a walking assistance vehicle, a shopping cart, a cart, and the like. Further, the convenience of the electric vehicle can be enhanced, and particularly, the operability of the electric vehicle can be enhanced to enhance the convenience of the electric vehicle.

  An electric vehicle according to another aspect of the present embodiment is provided with an armrest 5 located at least on one side in a seat width direction with respect to a seating portion 21 of a seat 2, and front and rear operations for operating the electric vehicle. The front operating device 6 is supported by the armrest 5, and the rear operating device 7 is arranged rearward with respect to the back plate 4 in the upright position. The seat 21 and the back plate are provided. 4 is in the sitting position and the standing position, the electric vehicle can be operated by the front control unit 6, and in the state in which the sitting unit 21 and the back plate 4 are in the retracted position and the lying position, respectively, the electric vehicle is in the rear position. It can be operated by the side controller 7.

  Therefore, in the deployed state of the electric vehicle, the user is seated on the seating portion 21 of the seat as described above and leans against the back plate 4 as described above, and the front operation device 6 arranged on the armrest 5 is arranged. Can be operated. At this time, since the back plate 4 is located between the user and the rear operation device 7, the back plate 4 can prevent the user from accidentally touching the rear operation device 7. Therefore, the operability of the electric vehicle can be improved in order to improve the convenience of the electric vehicle.

  An electric vehicle according to another aspect of the present embodiment includes a frame 3 that is arranged on the moving base 1 behind the seat portion 21 when the seat is in the seat position, and the back plate 4 has the standing position and the fall position. It is mounted on the frame 3 so as to be pivotable to and from the position. Therefore, since the back plate 4 can be changed between the upright position and the fall position by a simple process of turning the back plate 4, the operability of the electric vehicle is enhanced to improve the convenience of the electric vehicle. You can

  An electric vehicle according to another aspect of the present embodiment is configured to be electrically drivable, and has a moving base 1 having a front wheel 11 and a rear wheel 12, and a seat 2 including a seating portion 21 having a seating surface 21a. The moving base 1 is changeable so as to enlarge and reduce the wheel base H between the front wheel 11 and the rear wheel 12, and the seat 2 is provided with a detecting device 8 configured to detect the position of the seat 2. , A seating position in which the seating portion 21 is arranged so that the seating surface 21a faces upward, and a seating position in which the seating portion 21 is retracted forward from the seating position, and the seat 2 in the seating position is When the detection device 8 detects the movement, the movement base 1 starts a change for reducing the wheel base H, and the detection device 8 indicates that the seat 2 in the retracted position has moved. When knowledge, the moving base 1 starts changing for enlarging the wheelbase H.

  In such an electric vehicle, the moving base 1 has an enlarged state in which the wheel base H is enlarged so as to bring the electric vehicle into a deployed state in which the electric vehicle can stably travel, and a wheel base in which the electric vehicle is in a folded state in which the electric vehicle can make a small turn. It is possible to change to a reduced state in which H is reduced. Further, if the movement of the seat 2 in the seated position is changed to the retracted position and the movement of the seat 2 is manually started, the detection device 8 detects the movement start of the seat 2 and the movement base 1 is detected by the detection. The wheel base H can be driven so as to be contracted to automatically bring about the folded state of the electric vehicle. Furthermore, if the movement of the seat 2 in the seated position is changed to the retracted position and the movement of the seat 2 is manually started, the detection device 8 detects the start of movement of the seat 2 and the movement base 1 is detected by the detection. The wheel base H can be driven so as to be expanded, and the deployed state of the electric vehicle can be automatically brought. Therefore, it is possible to easily switch between the deployed state and the folded state of the electric vehicle by manually operating the seat 2.

  Further, when the seating portion 21 is arranged at the seating position so as to occupy the seating space in the vehicle in the deployed state of the electric vehicle, the vehicle can be stably driven and the user can stably operate. It is possible to make it possible to sit on the seat portion 21. In addition, when the seating portion 21 is arranged in the retracted position so as to retract from the seating space when the electric vehicle is in the folded state, the electric vehicle can be rotated in a small direction, and luggage such as a shopping basket is placed in the seating space. Can be placed. Therefore, the electric vehicle in the folded state can be efficiently used as a walking assistance vehicle, a shopping cart, a cart, etc., and the convenience of the electric vehicle can be improved.

  In the electric vehicle according to still another aspect of the present embodiment, the seat 2 is in the seated position when the moving base 1 is in an expanded state in which the wheel base H is expanded, and the moving base 1 is in the wheel base H. Is in the retracted position when the movable base 1 is contracted to be shorter than the expanded state of the moving base 1, and the detection device 8 is arranged so as to correspond to the seat 2 in the seated position or in the expanded state. The first sensor 8a arranged so as to be able to detect that the moving base 1 in Fig. 2 has started the change for reducing the wheel base H, and the first sensor 8a arranged so as to correspond to the seat 2 in the retracted position. Or a second sensor 8b arranged so as to be able to detect that the moving base 1 in the contracted state has started the change for enlarging the wheel base H.

  Therefore, if the first sensor 8a detects the start of movement of the seat 2 in the seated position or the start of movement of the movement base 1 in an expanded state in conjunction with the movement of the seat 2, the wheel base H is reduced by the detection. The moving base 1 can be reliably driven, and the folded state of the electric vehicle can be reliably brought. Further, if the second sensor detects the start of movement of the seat 2 in the retracted position, or the start of movement of the movement base 1 in the contracted state while being linked with the movement, the movement causes the wheel base H to be expanded. The base 1 can be reliably driven, and the deployed state of the electric vehicle can be reliably brought. Therefore, the user can easily switch between the deployed state and the folded state of the electric vehicle by manually operating the seat 2, and the convenience of the electric vehicle can be improved.

  In the electric vehicle according to still another aspect of the present embodiment, one of the front wheel 11 and the rear wheel 12 is driven and the other of the front wheel 11 and the rear wheel 12 is stopped in order to enlarge and reduce the wheel base H. To do. Therefore, without separately providing a drive mechanism for enlarging and reducing the wheel base H, it is possible to drive one of the front wheels 11 and the rear wheels 12 that are permanently installed to drive and drive the electric vehicle, and brake the other of these. Can be used to expand and contract the wheelbase H. As a result, the space for installing the drive mechanism in the electric vehicle can be reduced, and the space for loading luggage such as a shopping basket can be expanded. Therefore, the convenience of the electric vehicle can be improved.

"Second embodiment"
An electric vehicle according to the second embodiment will be described. The electric vehicle according to the present embodiment is configured similarly to the electric vehicle according to the first embodiment, except for the configuration described below. Therefore, when the constituent elements of the electric vehicle according to the present embodiment are configured in the same manner as the constituent elements of the electric vehicle according to the first embodiment, the same reference numerals are given.

  Referring to FIGS. 1 to 8, in the electric vehicle according to the present embodiment, the moving base 1 is configured such that the front wheels 11 and the rear wheels 12 can be driven in reverse with respect to each other in order to enlarge and reduce the wheel base H. Has been done. That is, when enlarging the wheel base H, the front wheels 11 are rotationally driven so as to move the front base 13 forward of the vehicle, and the rear wheels 12 are rotationally driven so as to move the rear base 14 rearward of the vehicle. Further, when reducing the wheel base H, the front wheels 11 are rotationally driven so as to move the front base 13 rearward of the vehicle, and the rear wheels 12 are rotationally driven so as to move the rear base 14 forward of the vehicle.

  In such an electric vehicle, the front side base 13 has a drive motor for rotationally driving the front wheels 11, which is not specifically shown. For example, the drive motor may be arranged so as to be adjacent to each front wheel 11 in the vehicle width direction, or the drive motor may be built in each front wheel 11. However, the drive motor is not limited to this. The drive motor for the front wheels 1 is electrically connected to the battery 15 and the control device 16.

  As described above, in the electric vehicle according to the present embodiment, it is possible to obtain the same effects as those of the electric vehicle according to the one aspect and the another aspect of the first embodiment. Further, in the electric vehicle according to the present embodiment, in order to expand and contract the wheel base H, one of the front wheels 11 and the rear wheels 12 is driven, and the effect based on the configuration in which the other of them is stopped is excluded, It is possible to obtain the same effect as that of the electric vehicle according to another aspect of the first embodiment.

  Further, in the electric vehicle according to the present embodiment, the front wheels 11 and the rear wheels 12 can be driven in reverse with respect to each other so as to enlarge and reduce the wheel base H. Therefore, without separately providing a drive mechanism for enlarging and reducing the wheel base H, the wheel base H is enlarged and reduced by using the drive of the front wheels 11 and the rear wheels 12 that are permanently installed to drive and drive the electric vehicle. Can be made As a result, the space for installing the drive mechanism in the electric vehicle can be reduced, and the space for loading luggage such as a shopping basket can be expanded. Therefore, the convenience of the electric vehicle can be improved.

"Third Embodiment"
An electric vehicle according to the third embodiment will be described. The electric vehicle according to the present embodiment is configured similarly to the electric vehicle according to the first or second embodiment, except for the configuration described below. Therefore, when the constituent elements of the electric vehicle according to the present embodiment are configured in the same manner as the constituent elements of the electric vehicle according to the first or second embodiment, the same reference numerals are given.

  As shown in FIGS. 9 and 10, the electric vehicle according to the present embodiment is the first or the first except that the back plate 104 is movable along the frame 3 between the standing position and the fall position. It has a back plate 104 configured similarly to the back plate 4 of the second embodiment. Then, the back plate 104 may be further configured as follows. The back plate 104 has a base end portion 104a and a front end portion 104b located on the lower end side and the upper end side in the vehicle up-down direction, respectively, in the standing position. The base end portion 104 a of the back plate 104 is connected to the rear end area of the seat portion 21 of the seat 2 via the connecting member 141.

  Specifically, each of the two connecting members 141 has a back plate side mounting portion 141 a that is mounted on both ends of the base end portion 104 a of the back plate 104 in the seat width direction. The back plate side mounting portion 141a is mounted on the base end portion 104a of the back plate 104 so as to be rotatable about a pivot axis 141b extending in the seat width direction with respect to the base end portion 104a of the back plate 104.

  The two connecting members 141 also have seat-side attachment portions 141c attached to both ends of the rear end portion of the seat portion 21 in the seat width direction. The seat side attachment portion 141c is arranged with a space from the back plate side attachment portion 141a. The seat side attachment portion 141c is attached to the rear end region of the seat portion 21 so as to be rotatable about a pivot axis 141d extending in the seat width direction with respect to the rear end region of the seat portion 21.

  A tip portion 104b of the back plate 104 is attached to the frame 3 so as to be rotatable and slidable with respect to the frame 3. Specifically, both ends in the seat width direction of the front end portion 104b of the back plate 104 are respectively rotatable with respect to the two columns 31 of the frame 3 about a rotation axis 104c extending in the seat width direction, and It is attached to the two columns 31 so as to be slidable along the two columns 31 together with the turning axis 104c.

  When the back plate 104 is in the upright position, the base end portion 104 a of the back plate 104 is located above the vehicle with respect to the seat support mechanism 32 of the support column 31 of the frame 3. Further, with the seat 2 in the retracted position and the back plate 104 in the lying position, the base end portion 104a of the back plate 104 is supported by the rear end region of the seat portion 21 of the seat 2 via the connecting member 141. The front end portion 104b of the back plate 104 is supported by the seat support mechanism 32 of the frame 3.

  The back plate 104 moves between the upright position and the fall position as the seat 2 moves between the sitting position and the retracted position. When the back plate 104 moves from the upright position to the lying position, the back plate 104 turns to the vehicle front side around the turning axis 104c of the tip portion 104b of the back plate 104, and the tip portion 104b of the back plate 104 moves to the support column 31. Along the way, the vehicle moves downward from above. Further, when the seat 2 reaches the retracted position and the tip portion 104b of the back plate 104 reaches the seat support mechanism 32 of the frame 3, the back plate 104 is arranged along the vehicle horizontal direction. At this time, the back plate 104 reaches the lying position. The reverse operation is performed when the back plate 104 moves from the lying position to the standing position.

  As described above, in the electric vehicle according to the present embodiment, it is possible to obtain the same effects as those of the electric vehicle according to the one aspect of the first embodiment and the still another aspect. In addition, the electric vehicle according to the present embodiment is different from the first embodiment except for the effect based on the configuration in which the back plate 4 is attached to the frame 3 so as to be able to turn between the standing position and the fall position. It is possible to obtain the same effect as that of the electric vehicle according to one aspect.

  Further, the electric vehicle according to the present embodiment further includes a frame 3 arranged on the moving base 1 behind the seat portion 21 when the seat is in the seat position, and the back plate 104 has a standing position and a lying position. It is movable along the frame 3 between. Therefore, the back plate 104 can be changed between the upright position and the fall position by a simple process of moving the back plate 104 along the frame 3, so that the convenience of the electric vehicle can be improved. Operability can be improved.

"Fourth Embodiment"
An electric vehicle according to the fourth embodiment will be described. The electric vehicle according to the present embodiment is configured similarly to the electric vehicle according to any one of the first to third embodiments, except for the configuration described below. Therefore, when the constituent elements of the electric vehicle according to the present embodiment are configured in the same manner as the constituent elements of the electric vehicle according to the electric vehicle according to any one of the first to third embodiments, the same reference numerals are given. ..

  As shown in FIGS. 11 and 12, the electric vehicle according to the present embodiment is configured to move in the same manner as the movement base 1 in any one of the first to third embodiments, except for the points described below. It has a base 201. The moving base 201 includes a front base 213 having the front wheels 11 and a rear base 214 having the rear wheels 12. The rear base 214 is arranged rearward of the vehicle with respect to the front base 213.

  The front and rear bases 213 and 214 are configured similarly to the front and rear bases 13 and 14 of the moving base 1 in any one of the first to third embodiments, respectively, except for the points described below. To be done. The front and rear bases 213 and 214 of the moving base 201 are connected to each other so as to be capable of turning about a turning axis 201a extending in the vehicle width direction. More specifically, the front base 213 has two front side members 213a that are spaced apart from each other in the vehicle width direction. The rear base 214 has two rear side members 214a that are arranged at intervals in the vehicle width direction.

  The front and rear side members 213a, 214a are configured similarly to the front and rear side members 13a, 14a in any one of the first to third embodiments, respectively, except for the points described below. The vehicle front-rear direction rear end portions of the two front side members 213a can respectively be turned by the turning coupling mechanism 217 about the turning axis 201a with respect to the vehicle front-rear direction front end portions of the rear side members 214a. As these are attached to the front end. The moving base 201 has the swing connecting mechanism 217 instead of the base guide 17 of the moving base 1 in any one of the first to third embodiments.

  When the moving base 201 changes from the expanded state to the contracted state, the rear end portion of the front base 213 in the vehicle front-rear direction turns around the rotation axis 11a of the front wheel 11 so as to be lifted above the vehicle. Further, the front end portion of the rear base 214 in the vehicle front-rear direction turns so as to be lifted above the vehicle about the rotation axis 12a of the rear wheel 12. As a result, the front and rear bases 213 and 214 are bent in a substantially mountain shape so that the swivel connecting mechanism 217 is the apex. When the moving base 201 changes from the contracted state to the expanded state, the reverse operation is performed.

"Fifth Embodiment"
An electric vehicle according to the fifth embodiment will be described. The electric vehicle according to the present embodiment is configured similarly to the electric vehicle according to any one of the first to third embodiments, except for the configuration described below. Therefore, when the constituent elements of the electric vehicle according to the present embodiment are configured in the same manner as the constituent elements of the electric vehicle according to the electric vehicle according to any one of the first to third embodiments, the same reference numerals are given. ..

  Note that the detection device and the like are omitted in FIGS. 13 to 17 used to describe the electric vehicle according to the present embodiment. However, the electric vehicle according to the present embodiment can include such a detection device and the like, and in the electric vehicle according to the present embodiment, the actions and effects based on the detection device and the like are also the first to the third. It can be obtained similarly to the embodiment.

"About Mobile Base"
As shown in FIGS. 13 to 17, the electric vehicle according to the present embodiment is configured to move in the same manner as the movement base 1 in any one of the first to third embodiments, except for the points described below. It has a base 301. The moving base 301 is configured to be changeable so as to enlarge and reduce the wheel base H between the front wheels 11 and the rear wheels 12, similarly to the moving base 1 in any one of the first to third embodiments. .

  The moving base 301 includes a front base 313 having the front wheels 11 and a rear base 314 having the rear wheels 12. The rear base 314 is arranged rearward of the vehicle with respect to the front base 313. The front and rear bases 313 and 314 respectively correspond to the front and rear bases 13 and 14 in any one of the first to third embodiments. The front and rear bases 313 and 314 are similar to the front and rear bases 13 and 14 in any one of the first to third embodiments so that the wheel base H can be expanded and contracted with respect to each other. It is configured to be relatively movable in the vehicle front-rear direction.

  The front side base 313 has two front side members 313a respectively corresponding to the two front side members 13a in any one of the first to third embodiments. The rear side base 314 has two rear side members 314a respectively corresponding to the two rear side members 14a in any one of the first to third embodiments.

  Each front side member 313a has a turning shaft 317 formed so as to project in the vehicle width direction from a rear end portion of the front side member 313a in the vehicle front-rear direction. Although details will be described later, the leg portion 322 of the seat 302 is attached to the turning shaft 317. The pivot shaft 317 is arranged so as to avoid interference with the rear base 314 when the front and rear bases 313, 314 move relative to each other.

  Further, the turning shaft 317 may be located at the front end portion of the rear side member 314a in the vehicle front-rear direction in the expanded state of the moving base 301. The swivel shaft 317 may also be located near the rear wheel 12 in the contracted state of the moving base 301.

"About the sheet"
As shown in FIGS. 13 to 17, the electric vehicle according to the present embodiment has a seat 302 configured similarly to the seat 2 in any one of the first to third embodiments, except for the points described below. Have. The seat 302 includes two legs 322 capable of supporting the seat 21. The two leg portions 322 correspond to the two leg portions 22 in any one of the first to third embodiments, respectively.

  The seat 302 also has two seat side members 323 respectively corresponding to the two seat side members 23 in any one of the first to third embodiments. The seat 302 has a back plate support mechanism 324 configured to support the back plate 304 in a state where the seat 302 and a back plate 304, which will be described later, are in the retracted position and the lying position, respectively. In addition, in FIG. 16, the back plate support mechanism 324 is a rear end of the seat portion 21 in the seat front-rear direction. However, the present invention is not limited to this, and the back plate support mechanism projects downward in the seat up-down direction from each seat side member as in the back plate support mechanism according to any one of the first to third embodiments. May be formed as follows.

  Each leg 322 may extend so as to incline from the rear in the seat front-rear direction to the front as it goes downward from the upper part in the seat up-down direction. Each leg 322 may extend from the rear end of the corresponding seat side member 323 in the seat front-rear direction to the lower side in the seat up-down direction.

  Each leg 322 has a base attachment area 322a configured to attach the leg 322 to the front base 313. The base attachment area 322a is pivotally attached to the pivot shaft 317 of the front side member 313a. More specifically, the base mounting area 322a has a mounting elongated hole 322b penetrating in the vehicle width direction so that the turning shaft 317 can be inserted. The attachment long hole 322b extends along the longitudinal direction of the leg portion 322. When the front base 313 moves in the vehicle front-rear direction with respect to the rear base 314, the turning shaft 317 moves in the attachment elongated hole 322b along the longitudinal direction of the attachment elongated hole 322b.

  As will be described in detail later, each leg 322 has a frame attachment area 322c configured to be attached to the frame 303 so that the leg 322 can be pivoted with respect to the frame 303 described below. The frame attachment area 322c is located between the seat 21 and the base attachment area 322a. The base mounting area 322a of each leg 322 is located at the lower end of the leg 322 in the seat vertical direction, and the frame mounting area 322c of each leg 322 is located in the middle of the leg 322 in the seat vertical direction. Good location.

"About the frame"
As shown in FIGS. 13 to 17, the electric vehicle according to the present embodiment has a frame 303 configured in the same manner as the frame 3 in any one of the first to third embodiments, except for the points described below. Have. The frame 303 has two support columns 331 corresponding to the two support columns 31 in any one of the first to third embodiments. Each of the columns 331 has a seat turning attachment portion 331a configured to attach the frame attachment area 322c of the leg portion 322 corresponding thereto. The frame attachment area 322c is attached to the seat turning attachment portion 331a so as to be turnable about a turning axis 322d extending in the vehicle width direction.

  The seat turning attachment portion 331a is arranged between the front end and the rear end of the rear base 314 in the vehicle front-rear direction. In particular, the seat turning attachment portion 331a is preferably arranged in the lower region of each of the columns 331 located below the vehicle with respect to the seating portion 21 at the seating position. The lower region of the pillar 331 may be formed so as to project in a substantially triangular shape toward the front of the vehicle. In this case, the seat turning mounting portion 331a may be located at the top of the lower region of the support column 331 that projects toward the front of the vehicle.

  Although not specifically illustrated, the frame 303 has a seat supporting mechanism and a connecting member similar to the seat supporting mechanism 32 and the connecting member 33 in any one of the first to third embodiments, respectively.

"About the backboard"
As shown in FIGS. 13 to 17, the electric vehicle according to this embodiment has a back plate 304. The back plate 304 includes a base end portion 4a, a tip end portion 4b, and a base end portion 304a, a tip end portion 304b, and a pivot axis line 304c respectively corresponding to the base end portion 4a, the tip end portion 4b, and the pivot axis line 4c in any one of the first to third embodiments. Have. The back plate 304 is configured similarly to the back plate 4 in any one of the first to third embodiments, except that the turning axis 304c is located at the base end 304a.

"About armrests and front and rear operating devices"
As shown in FIGS. 13 and 15 to 17, the electric vehicle according to the present embodiment has an armrest 305 configured similarly to the armrest 5 in any one of the first to third embodiments. The electric vehicle according to the present embodiment has front and rear operating devices 306 and 307 respectively corresponding to the front and rear operating devices 6 and 7 in any one of the first to third embodiments. The electric vehicle has two armrests 305, two front operation devices 306, and two rear operation devices 307.

  The front operating device 306 is configured similarly to the front operating device 6 in any one of the first to third embodiments, except for the points described below. The front operating device 306 is a joystick. However, the front operating device is not limited to this. The two front operation devices 306 are attached to the front end portions of the two armrests 305, respectively. However, the vehicle may have one front operating device attached to one of the two armrests. Note that such two front operation devices 306 can also be applied to the vehicles of the first to fourth embodiments.

  The rear operation device 307 is configured similarly to the rear operation device 7 in any one of the first to third embodiments, except for the points described below. The rear operation device 307 is a joystick. However, the front operating device is not limited to this. The two rear operation devices 307 are attached to the two columns 331 of the frame 303, respectively. However, the rear operation device may be attached to the connecting member of the frame, as in the first to third embodiments.

  Regarding the relationship between the rear operation device 307 and the back plate 304, the back plate 304 is arranged so as to cover the rear operation device 307 from above the vehicle in the standing position. The tip portion 304b of the back plate 304 is bent from the front side of the vehicle toward the rear side of the vehicle as it goes from the lower side of the vehicle to the upper side of the vehicle with the back plate 304 in the upright position. However, the back plate is not limited to this, and for example, the tip of the back plate is inclined from the vehicle front toward the vehicle rear as the vehicle goes from the lower side of the vehicle to the upper side of the vehicle with the back plate in the standing position. Good. Further, the tip portion of the back plate may be formed in a substantially L shape. The disposition of the back plate 304 can also be applied to the disposition of the back plate 4 in the first to fourth embodiments.

  The vehicle according to the present embodiment as described above can perform the deforming operation similarly to the example of the deforming operation of the vehicle according to the first embodiment described above. Furthermore, in the moving body according to the present embodiment, the following effects can be obtained in addition to the effects of the moving body according to one aspect of the first embodiment.

  In the moving body according to the aspect of the present embodiment, the leg mounting portion 322c of the seat 302 is configured to be mounted on the frame 303 so that the leg portion 322 can be pivoted with respect to the frame 303. And the frame mounting area 322c is located between the seating portion 21 and the base mounting area 322a. Therefore, the seating portion 21 of the seat 302 can be stably and smoothly moved forward and backward in the unfolded state of the moving body, so that the moving body can be used efficiently. Therefore, the convenience of the moving body can be improved.

  In the electric vehicle according to another aspect of the present embodiment, the back plate 304 is arranged to cover the rear operation device 307 from above the vehicle in the state of standing up. Therefore, when the moving base 301 is in the expanded state and the occupant seated on the seat 302 is operating the front operating device 306, the back plate 304 restricts access to the rear operating device 307 of the occupant. You can Further, even when the moving base 301 is in the expanded state and the rear operation device 307 is inoperable, unnecessary access to the rear operation device 307 of the occupant can be restricted, resulting in damage to the rear operation device 307. Can be prevented.

  Although the embodiments of the present invention have been described so far, the present invention is not limited to the above-described embodiments, and the present invention can be modified and changed based on the technical idea thereof.

1, 201, 301 ... Moving base, 11 ... Front wheel, 12 ... Rear wheel, 2,302 ... Seat, 21 ... Seating portion, 21a ... Seating surface, 8 ... Detecting device, 8a ... First sensor, 8b ... Second sensor , H ... Wheel base

Claims (5)

A movable base that is configured to be electrically drivable and has front wheels and rear wheels;
A seat including a seating portion having a seating surface;
An electric vehicle comprising a detection device configured to detect the position of the seat,
The moving base is variably configured to expand and contract a wheel base between the front wheels and the rear wheels,
The seat is configured to be movable between a seating position in which the seating portion is arranged such that the seating surface faces upward, and a retracted position in which the seating portion is retracted forward from the seating position,
When the movement of the seat in the seated position is detected by the detection device, the movement base is configured to start a change for reducing the wheel base,
An electric vehicle configured such that, when the detection device detects that the seat in the retracted position has moved, the movement base starts a change for enlarging the wheel base.   The electric vehicle according to claim 1, wherein the seat is attached to the moving base so as to be movable according to expansion and contraction of the wheel base. The seat is in the seated position when the moving base is in an expanded state in which the wheel base is expanded, and the moving base contracts the wheel base so as to make the wheel base shorter than the expanded state of the moving base. It is configured to be in the retracted position when in the contracted state,
The detection device is arranged so as to correspond to the seat in the seated position or makes it possible to detect that the movable base in the expanded state has started a change for reducing the wheel base. It is possible to detect that the sensor arranged in the above position and the moving base arranged corresponding to the seat in the retracted position or in the contracted state have started a change for enlarging the wheel base. The electric vehicle according to claim 2, having another sensor arranged to operate.   4. One of the front wheel and the rear wheel is driven and the other of the front wheel and the rear wheel is stopped so as to expand and contract the wheel base. The electric vehicle according to claim 1.   The electric vehicle according to any one of claims 1 to 3, wherein the front wheel and the rear wheel are configured to be capable of being driven in reverse with respect to each other in order to expand and contract the wheel base.