JP7209212B2 - electric vehicle - Google Patents

Description

Article 30, Paragraph 2 of the Patent Law applies [Place of publication] Nursing home “Kanzanji no Sato” 1st floor hall [Date of publication] October 10, 2018

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle including a moving base having front and rear wheels and a seat arranged on the moving base.

2. Description of the Related Art Electric vehicles such as electric wheelchairs and electric carts that can be driven by driving means such as motors have become popular as means of transportation for users such as the elderly and people requiring nursing care. Such an electric vehicle is sometimes called a "senior car". Typically, an electric vehicle includes a movement base configured to be able to travel by electric drive, and a seat having a seating portion and arranged on the movement base. You can move while seated on the part.

The electric vehicle may be configured to be foldable, and more specifically, the electric vehicle has a mobile base so as to allow a user to ride and to obtain stability during running. In some cases, the movable base can be changed between an unfolded state in which it is expanded in the front-rear direction and a folded state in which the movement base is contracted in the front-rear direction so as to be suitable for manual movement from the rear of the electric vehicle. Various techniques have been proposed to make the moving base of a vehicle such as an electric vehicle or an engine-driven vehicle, that is, the 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. In addition, there is a technique in which the front frame and the rear frame are movable in the longitudinal direction with respect to each other so that the vehicle body can be extended and contracted in the longitudinal direction.

JP-A-2001-048497

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 movement 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 range in the electric vehicle so that the user can be stably seated in the unfolded state in which the movement base is expanded in the front-rear direction and the folded state in which the movement base is contracted in the front-rear direction. It will happen. When using such an electric vehicle in a folded state, the seat often becomes an obstacle. That is, the electric vehicle cannot be efficiently used in the folded state. Therefore, such an electric vehicle cannot be used efficiently in a folded state, and the electric vehicle is less convenient.

Considering the above situation, it is desired that the electric vehicle can be efficiently used in a folded state to improve convenience.

In order to solve the above-described problems, an electric vehicle according to one aspect includes a moving base that has front wheels and rear wheels and is configured to be able to travel by being electrically driven by a drive motor, and a seating portion that has a seating surface. a detecting device configured to detect the position of the seat; and a control device electrically connected to the drive motor and the detecting device , wherein the moving base moves the The seat is variably configured to expand and contract a wheelbase between the front wheels and the rear wheels by driving a drive motor, and the seat is arranged such that the seating surface faces upward. and a retracted position in which the seating section retracts forward from the seating position and the seating surface faces forward by manual operation, and is in the seating position. When the detection device detects that the seat has started to move to the retracted position, the control device causes the movement base to contract the wheel base in conjunction with the movement of the seat to the retracted position. when the detecting device detects that the seat in the retracted position has started to move to the seating position, the control The apparatus is configured to control the drive motor such that the movement base initiates a change for enlarging the wheelbase in conjunction with movement of the seat to the seating position .

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

FIG. 1 is a front perspective view schematically showing an electric vehicle according to the first embodiment in an unfolded state. FIG. 2 is a cross-sectional view taken along line AA of FIG. 3 is a cross-sectional view taken along line BB of FIG. 1. FIG. FIG. 4 is a rear perspective view schematically showing the electric vehicle on which the basket is mounted in the unfolded state in the first embodiment. FIG. 5 is a left side view schematically showing the electric vehicle on which the basket is mounted in the unfolded state in the first embodiment. FIG. 6 is a left side view schematically showing a state in the middle of transition between an unfolded state and a folded state of the electric vehicle equipped with the basket in the first embodiment. FIG. 7 is a left side view schematically showing the electric vehicle in which the basket is mounted in the folded state in the first embodiment. FIG. 8 is a front perspective view schematically showing the electric vehicle on which the basket is mounted in the folded state in the first embodiment. FIG. 9 is a front perspective view schematically showing a seat in a seated state and a back plate in a standing state in an electric vehicle according to a third embodiment. FIG. 10 is a front perspective view schematically showing the seat in the retracted state and the back plate in the reclined state in the electric vehicle according to the third embodiment. FIG. 11 is a left side view schematically showing the movement base in an enlarged state in the electric vehicle according to the fourth embodiment. FIG. 12 is a left side view schematically showing the movement base in a 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 an unfolded state. FIG. 14 is a front perspective view schematically showing a movement base of an electric vehicle according to a fifth embodiment and its surroundings. FIG. 15 is a rear perspective view schematically showing a state in the middle of transitioning between an unfolded state and a folded state of an electric vehicle equipped with a basket according to the fifth embodiment. FIG. 16 is a right side view schematically showing the electric vehicle according to the fifth embodiment in the middle of transition between the unfolded and folded states. FIG. 17 is a right side view schematically showing the electric vehicle according to the fifth embodiment in a folded state.

Moving bodies according to the first to fifth embodiments will be described below. Such a vehicle may be a single-seat vehicle, and the vehicle may be configured such that a seat installed on the vehicle is open to the outside of the vehicle. For example, the mobile object can be a wheelchair, a cart, etc., and in particular, the mobile object can be a single-person wheelchair, a single-person cart, or the like. However, the moving body is not limited to these configurations.

Further, the mobile body may be an electric vehicle configured to be able to travel by electric drive, and each embodiment will be described for a case where the mobile body is an electric vehicle. Specifically, the electric vehicle according to each embodiment is an electric cart, particularly a one-seat electric cart. However, the electric vehicle is not limited to this, and may be anything other than an electric cart. For example, the motorized vehicle may be a motorized wheelchair, in particular a single seater motorized wheelchair. In the following, the electric vehicle will simply be referred to as a "vehicle" as necessary.

1, 2, and 4 to 17, which are used to describe the present embodiment, the front of the vehicle and the rear of the vehicle are indicated by arrows F and R, respectively. That is, the vehicle front-rear direction is indicated by arrow F and arrow R. As shown in FIG. 1, 3, 4, 8 to 10, 14 and 15, an arrow W indicates the vehicle width direction. 1 to 17, the vehicle upper side and the vehicle lower side are indicated by arrows U and L, respectively. That is, the vertical direction of the vehicle is indicated by arrows U and L. As shown in FIG.

"First Embodiment"
An electric vehicle according to a first embodiment will be described with reference to FIGS. 1 to 8. FIG.

"Overview of Electric Vehicles"
An outline of an 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 electrically driven to travel. The vehicle has one seat 2 arranged on a mobile base 1 . In particular, the seat 2 is designed for one person. However, the vehicle seat is not limited to this. As shown in FIGS. 1, 2 and 4, the vehicle has a frame 3 positioned behind the seat 2 on the mobile base 1 .

The vehicle has a back panel 4 configured to be used as a backrest for a user boarding the vehicle. A back plate 4 is arranged on the moving base 1 . The vehicle has two armrests 5 positioned on both sides of the seat 2 in the seat width direction. Note that the seat width direction substantially coincides with the vehicle width direction. Each armrest 5 is also arranged on the movement base 1 . However, the vehicle can also have armrests in at least one of the seat width directions with respect to the seat.

As shown in Figures 1 and 4, the vehicle has a front operating device 6 and a rear operating device 7 configured to enable it to be operated. The rear operating device 7 is arranged behind the vehicle with respect to the front operating device 6 . The front and rear operation devices 6 and 7 are operated by a user, an assistant, or the like to drive the vehicle, steer the vehicle, adjust the speed of the vehicle, and brake the vehicle. It is configured so that an operation or the like for doing so can be performed. Although not clearly illustrated, each of the front and rear operating devices 6 and 7 preferably has a joystick, touch panel, steering wheel, or the like configured to enable operation of the vehicle. 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 electric vehicle, the moving base 1 has two front wheels 11 and two rear wheels 12 spaced apart from the front wheels 11 behind the vehicle. The front wheels 11 and the rear wheels 12 are running wheels of the vehicle. However, the mobile base may have at least one front wheel and two or more rear wheels, or two or more front wheels and at least one rear wheel.

As shown in FIGS. 1, 2 and 4, the mobile base 1 also includes a front base 13 with the front wheels 11 and a rear base 14 with the rear wheels 12 . The rear base 14 is arranged behind the vehicle with respect to the front base 13 . As shown in FIGS. 1 and 5 to 8, the moving base 1 is variably configured to expand and contract the wheelbase H between the front wheels 11 and the rear wheels 12. As shown in FIG. In other words, the front and rear bases 13, 14 of the mobile base 1 are configured to be movable relative to each other so that the wheelbase H can be expanded and contracted.

By relative movement of the front and rear bases 13 and 14, the moving base 1 is moved between an expanded state in which the wheelbase H is expanded and a reduced state in which the wheelbase H is reduced to be shorter than the expanded state. can change. Further, the moving base 1 is configured such that the rear wheels 12 are driven and the front wheels 11 are stopped in order to expand and contract the wheel base H. As shown in FIG. That is, when enlarging the wheel base H, the rear wheels 12 rotate to move the rear base 14 rearward of the vehicle, and the front wheels 11 stop to keep the front base 13 at a fixed position. When the wheel base H is reduced, the rear wheels 12 rotate and drive the rear base 14 forward of the vehicle, and the front wheels 11 stop the front base 13 at a fixed position. However, the moving base may be configured such that the front wheels drive and the rear wheels stop to extend and retract the wheelbase.

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

As shown in FIGS. 1 and 5 to 8, the seat 2 is attached to the movement base 1 so as to be movable as the wheel base H expands and contracts. In the seat 2, the seat 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 longitudinal direction of the vehicle to reduce the wheel base H. It is configured. The seat 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 longitudinal direction of the vehicle for enlarging the wheel base H.

Further, the seat 2 is configured to be movable between a seating position in which the seating surface 21a of the seating portion 21 is directed upwardly of the vehicle and a retracted position in which the seating portion 21 is retracted forward of the vehicle from the seating position. ing. The seating portion 21 is arranged at the seating position in the expanded state of the moving base 1 . Also, the seat portion 21 is arranged at the retracted position in the contracted state of the moving base 1 .

As shown in FIGS. 2 and 3, the leg 22 has a base mounting area 22a configured to mount to the front base 13 so as to allow the leg 22 to pivot relative to the front base 13. As shown in FIGS. As shown in FIGS. 1 and 5 to 8, the movement of the seat 21 toward the front of the vehicle accompanies the relative movement of the front and rear bases 13 and 14 in the longitudinal direction of the vehicle to reduce the wheel base H. The movement of the base mounting area 22a of the leg 22 toward the rear of the vehicle and the pivoting of the leg 22 towards the front of the vehicle are effected. The seat portion 21 can move from the seat position to the retracted position by moving the seat portion 21 toward the front side of the vehicle.

By moving the front and rear bases 13 and 14 relative to each other in the longitudinal direction of the vehicle for enlarging the wheelbase H, the base mounting area 22a of the leg portion 22 is moved to the front side of the vehicle and the leg portion 22 is moved to the rear side of the vehicle. A turn is brought about, which leads to a vehicle rearward movement of the seat 21 . The seat portion 21 can move from the retracted position to the seated position by moving toward the rear side of the vehicle.

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

The back plate 4 is configured to be movable between an upright position positioned behind and above the vehicle with respect to the seat portion 21 in the seated position, and a reclined position positioned in front of the vehicle with respect to the upright position. It is As shown in FIGS. 7 and 8, the seat portion 21 in the retracted position is configured to support the back plate 4 in such a reclined position. Further, as shown in FIG. 2, the back plate 4 is attached to the frame 3 so as to be pivotable between an upright position and a reclined position.

A front operating device 6 is supported by one of the two armrests 5 . However, the front manipulator may be supported by both armrests. The rear operating device 7 is arranged behind the vehicle with respect to the back plate 4 when it is in the standing position. The front side operating device 6 can operate the vehicle in a state in which the seat portion 21 and the back plate 4 are in the sitting position and the standing position, respectively. The rear operating device 7 can operate the vehicle in a state in which the seat portion 21 and the back plate 4 are at the retracted position and the reclined position, respectively.

As shown in FIGS. 1 and 5 to 8, when the detection device 8 detects that the seat 2 in the sitting position has moved, the movement base 1 changes to reduce the wheel base H. configured to start. The vehicle is configured such that the movement base 1 starts changing to expand the wheel base H when the detection device 8 detects that the seat in the retracted position has moved.

As shown in FIGS. 1, 2 and 4 to 8, the detection device 8 corresponds to a first sensor 8a arranged to correspond to the seat 2 in the sitting position and to the seat 2 in the retracted position. and a second sensor 8b arranged to. However, if the seat is movable in response to the expansion and contraction of the wheelbase, the first sensor can detect that the movement base in the expanded state has begun a change to contract the wheelbase. may be placed. Also, the second sensor may be arranged to detect when the moving base in the contracted state has started to change to expand the wheel base. Further, the detection device may have one sensor configured to detect both the start of movement of the seat in the seating position and the start of movement of the seat in the retracted position.

As shown in FIGS. 1 and 5-8, the vehicle is in the unfolded state when the mobile base 1 is in the extended state and the seat 2 is in the sitting position. In the unfolded state, the vehicle can be driven by operating the front side operating device 6 while the user is on board. In the unfolded state, the vehicle can be driven by operating the rear side operation device 7 in a state where a user, an assistant, or the like is positioned at the rear of the vehicle. In the unfolded state, the vehicle can also be driven by pushing the vehicle with a user, an assistant, or the like positioned at the rear of the vehicle. Such vehicles, in the deployed state, can be used as wheelchairs, carts, and the like.

Also, the vehicle is in a folded state when the movement base 1 is in the retracted state and the seat is in the retracted position. In the folded state, the vehicle can be driven by operating the rear operation device 7 while the user is positioned at the rear of the vehicle. In addition, in the folded state, the vehicle can also be driven by the user pushing the vehicle while positioned at the rear of the vehicle. Such vehicles, in the folded state, can be used as walkers, shopping carts, trolleys, and the like.

"More about moving bases"
In detail, the mobile 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 can slide substantially linearly relative to each other in the longitudinal direction of the vehicle. In particular, the difference in the length of the wheel base H between the enlarged state and the contracted state of the movement base is preferably half or more and less than or equal to the maximum length of the seat 2 in the longitudinal direction of the seat. In this case, the vehicle can travel stably while stably supporting the user on board in the unfolded state in which the movement base 1 is expanded, and the vehicle can be in the folded state in which the movement base is contracted. So, it becomes compact and can turn in a small radius.

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

Although not clearly illustrated, the front base 13 is equipped with a braking device configured to brake 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 move forward and backward linearly, and the mover is preferably configured to be movable between a forward position where the mover is engaged with the front wheel 11 and a retracted position where the mover 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 to connect the front ends of the two front side members 13a. The front base 13 has a front plate 13c extending in the vehicle width direction so as to connect the lower surfaces of the two front side members 13a. The front base 13 is mounted with a battery 15 as a power supply source for the vehicle and a control device 16 for electrically controlling the vehicle. 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 behind the vehicle with respect to the front cross member 13b. The battery 15 and controller 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 spaced apart from each other in the width direction of the vehicle. The two rear wheels 12 are attached to rear end portions in the vehicle front-rear direction of two rear side members 14a so as to be rotatable about rotation axes 12a extending in the vehicle width direction. Although not clearly illustrated, the rear base 14 has a drive motor for driving each rear wheel 12 to rotate. For example, the drive motor may be arranged adjacent to each rear wheel 12 in the vehicle width direction, or the drive motor may be built 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. The control device 16 is also electrically connected to the sensing device 8, in particular the first and second sensors 8a, 8b of the sensing device 8. As shown in FIG.

As shown in FIGS. 1 and 4, each rear side member 14a has a guide portion 14b formed to protrude outward in the vehicle width direction from the rear side member 14a. 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. A rear end of the guide portion 14 b in the vehicle front-rear direction is located near the rear wheel 12 .

As shown in FIG. 2, each rear side member 14a is formed with a guide elongated hole 14c extending through the rear side member 14a in the vehicle width direction. The guide long hole 14c extends substantially linearly in the vehicle front-rear direction. The guide long hole 14c extends substantially parallel to the guide portion 14b.

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

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 positioned outside 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 spaced downward from the vehicle with respect to the lower arm portion 17c.

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 longitudinal direction of the vehicle with respect to the rear base 14. As shown in FIG. More specifically, the upper arm portion 17b of the base guide 17 slides in the longitudinal direction of the vehicle in the elongated guide hole 17c, and the lower arm portion 17c slides along the lower side of the guide in the longitudinal direction of the vehicle. .

As shown in FIG. 5, the base guide 17 is positioned at the front end of the rear side member 14a in the vehicle front-rear direction when the moving base 1 is expanded. As shown in FIG. 7, the base guide 17 is positioned near the rear wheel 12 when the moving base 1 is contracted. More specifically, the base guide 17 is positioned 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 when the moving base 1 is contracted.

As shown in FIGS. 1, 2 and 4, the rear base 14 has a shelf 18 configured to allow a basket K (shown in FIG. 4) to 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 arranged above the vehicle with respect to the two rear side members 14a.

"About sheet details"
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 horizontal direction of the vehicle in the seating position. The seat portion 21 is positioned directly above the shelf board 18 while being spaced apart from the shelf board 18 in the vertical direction of the vehicle in the sitting position. Between the shelf plate 18 and the seating portion 21, a luggage storage space S is formed in which the basket K can be stored.

When the seat 2 is 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 should be less than or equal to about 30° in absolute value. However, the angle of the seating surface is not limited to this. The seat portion 21 is arranged in front of the vehicle with respect to the shelf plate 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 portion 21 in the seat front-rear direction is a free end. Note that the seat front-rear direction is a direction substantially orthogonal to the seat width direction and extending between the front surface and the back surface of the seating portion 21 .

As shown in FIGS. 1 to 4, the seating portion 21 has two seat side members 23 spaced apart from each other in the seat width direction. The two seat side members 23 are positioned so as to correspond to the two leg portions 22 in the seat width direction. The two seat side members 23 are also positioned below the seating surface 21a in the vertical direction of the seat. Note that the vertical direction of the seat is a direction substantially orthogonal to the front-rear direction of the seat and the width direction of the seat. 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 reclined position, respectively. . The back plate support mechanism 24 is formed to protrude downward in the seat up-down direction from each seat side member 23 .

The seat 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. When the seat 2 and the back plate 4 are in the retracted position and the reclined position, respectively, the partition area 21b projects upward from the back panel 4, and the partition area 21b serves as a screen for the luggage placed on the back panel 4. can function.

The seat portion 21 has a handle hole 21c penetrating in the vertical direction of the seat through the rear end region thereof in the longitudinal direction of the seat. The handle hole 21c has an elongated shape extending in the seat width direction. The user can grip the rear end area of the seat 21 with his or her fingers inserted into the handle holes 21c.

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

As shown in FIG. 2, the base mounting area 22a has a pivot shaft 22b extending in the width direction of the vehicle. The base mounting section 22a is attached to the front side member 13a using a pivot shaft 22b such that the leg 22 is pivotable relative to the front side member 13a about the pivot shaft 22b. More specifically, base mounting area 22 a may be attached to base guide 17 .

The turning shaft 22b is attached to the upper arm portion 17c of the base guide 17 inserted into the guide elongated 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 vehicle front-rear direction within the guide slot 14c.

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, 14 in the longitudinal direction of the vehicle with the movement of the seat 2. . Specifically, the seat 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 capable of turning about a turning axis 25b extending in the vehicle width direction with respect to the rear side member 14a. The base-side mounting portion 25 a is positioned in front of the vehicle with respect to the base mounting area 22 a of the leg portion 22 . The base-side attachment portion 25a is attached to a 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 25 c 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 capable of turning about a turning axis 25d extending in the vehicle width direction with respect to the leg portion 22. As shown in FIG. More specifically, the seat-side attachment portion 25c is attached to an intermediate portion of the leg portion 22 in the vertical direction of the seat.

As shown in FIGS. 5 to 7, in order to move the seat portion 21 toward the front side of the vehicle, the base mounting area 22a of the leg portion 22 moves toward the rear side of the vehicle as the front side base 13 moves toward the rear side of the vehicle with respect to the rear base 14. When moving to the side, the link member 25 encourages the turning of the leg portion 22 to the front side of the vehicle. In addition, when the seat portion 21 moves toward the vehicle rear side, the link member is required when the base mounting area 22a of the leg portion 22 moves toward the vehicle front side as the front side base 13 moves toward the vehicle front side with respect to the rear side base 14. 25 encourages the turning of the leg portion 22 to the rear side of the vehicle.

"About Frame Details"
The frame 3 may be configured in detail as follows. As shown in FIGS. 1, 2 and 4, the frame 3 is arranged adjacent to the seat 2 behind the vehicle. The frame 3 has two struts 31 spaced apart from each other in the vehicle width direction. The two struts 31 are arranged so as to respectively correspond to the two rear side members 14a of the rear base 14 in the width direction of the vehicle. The two struts 31 are also arranged so as to respectively correspond to the two seat side members 23 in the seating portion 21 of the seat 2 in the vehicle width direction. Each strut 31 is arranged along the vertical direction of the vehicle. A lower end portion of the support column 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 capable of supporting the rear end of the seating portion 21 of the seat 2 at the seating position. More specifically, the frame 3 has two seat support mechanisms 32 that are arranged in intermediate portions of the two struts 31 in the vertical direction of the vehicle. The two support mechanisms 32 respectively support rear ends of the two seat side members 23 of the seat portion 21 in the seat front-rear direction. Further, the seat support mechanism 32 can be formed so as to protrude forward of the vehicle from the intermediate portion of the support 31 . In this case, the seat support mechanism 32 supports the rear end of the seat portion 21 from below the vehicle to above the vehicle.

The frame 3 has a connecting member 33 extending in the vehicle width direction so as to connect the upper end portions of the two struts 31 in the vehicle vertical direction. When the back plate 4 is in the upright position, the connecting member 33 is positioned behind the back plate 4 so as to abut on the back plate 4 . The rear operating device 7 is attached to the connecting member 33 .

"Details of the backboard"
Specifically, the back plate 4 may be configured as follows. As shown in FIG. 5 , the back plate 4 is arranged along a plane that extends in the vehicle width direction and the vehicle vertical direction in the upright position. The back plate 4 is also arranged along the horizontal direction of the vehicle in the laid down position. The back plate 4 is positioned directly above the shelf plate 18 while being spaced from the shelf plate 18 in the vertical direction of the vehicle. Between the back plate 4 and the shelf plate 18, a luggage storage space S that can accommodate the basket K is maintained.

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 positioned at the lower end side and the upper end side in the vertical direction of the vehicle, respectively, in a state of being in the standing position. A base end portion 4a of the back plate 4 is attached to two struts 31 of the frame 3 so that the back plate 4 can be turned about a turning axis 3c extending in the width direction of the vehicle. More specifically, the base end portion 4a of the back plate 4 is attached to the middle portion of the two support columns 31 in the vertical direction of the vehicle. A base end portion 4 a of the back plate 4 is positioned above the vehicle with respect to the seat support mechanism 32 of the column 31 of the frame 3 .

A tip portion 4b of the back plate 4 is a free end. The front end portion 4b of the back plate 4 can be turned around the turning axis 4c between the standing position and the laid down position. Further, 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 when the seat 2 is at the retracted position and the back plate 4 is at the reclined position.

"About armrest details"
Specifically, the armrest 5 may be configured as follows. As shown in FIGS. 1, 2 and 4, the armrest 5 is formed to extend in the longitudinal direction of the vehicle. The armrest 5 is positioned so as to be spaced from the seating portion 21 of the seat 2 above the vehicle. The two armrests 5 are attached to two struts 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 support 31 in the vehicle vertical direction.

A rear end portion of the armrest 5 is positioned above the vehicle with respect to the seat support mechanism 32 of the column 31 and the base end portion 4 a 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 the front end portion in the vehicle front-rear direction of one of the two armrests.

"About the details of the detector"
In detail, the detection device 8 may be as follows. As shown in FIG. 2 , the first sensor 8 a of the sensing device 8 may be a position sensor 8 a located on the seat support mechanism 32 of the frame 3 . The first sensor 8a is preferably configured to be capable of detecting the position of the rear end of the seat portion 21 in the seat 2 at the seated position, particularly the position of the rear end of the seat side member 23 in 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 movement base in the expanded state has started a change to reduce the wheel base, for example, the first sensor detects the movement in the expanded state. It can be arranged at the front end of the rear base in the longitudinal direction of the vehicle so that the position of the base guide of the front base in the base can be detected. Furthermore, the first sensor can also be a contact switch.

The second sensor 8b of the detection device 8 can 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 is preferably configured to detect the position of the upper end of the leg 22 on the seat 2 at 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 so as to be able to detect that the movement base in the contracted state has started a change for enlarging the wheel base, for example, the second sensor detects the movement in the contracted state. A rear end portion of the rear base in the front-rear direction of the vehicle can be arranged in front of the vehicle with respect to the rear wheels so that the position of the base guide of the front base in the base can be detected. Furthermore, the second sensor can also be a contact switch.

If the detection device has one sensor capable of detecting both the start of movement of the seat at the seating position and the start of movement of the seat at the retracted position, the one sensor may It may also be an angle sensor located in the base mounting area of the part.

"An example of vehicle deformation behavior"
An example of the deformation operation of the vehicle according to this embodiment will be described. First, the operation of transforming the vehicle from the unfolded state to the folded state will be described. In the unfolded state of the vehicle, the movement base 1 is in the expanded state and the seat 2 is in the seating position. When the user manually starts movement of the seat 2 from the seating position toward the retracted position, the detection device 8, particularly the first sensor 8a, detects the start of movement of the seat 2 from the seating position. The detection by 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 longitudinal direction of the vehicle so as to contract the wheel base H in order to change the movement base 1 from the expanded state to the contracted state. Specifically, for example, the control device 16 controls the braking device to stop the front wheels 11 and controls the drive motor to drive the rear wheels 12 in order to reduce the wheelbase H. Such relative movement of the front and rear bases 13, 14 is stopped when the moving base 1 is contracted.

Next, the operation of transforming the vehicle from the folded state to the unfolded state will be described. When the vehicle is folded, the moving base 1 is in the retracted state and the seat 2 is in the retracted position. When the user manually starts movement of the seat 2 from the retracted position toward the seating 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 by 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 longitudinal direction of the vehicle so as to expand the wheelbase H in order to change the movable base 1 from the contracted state to the expanded state. Specifically, for example, the control device 16 controls the braking device to stop the front wheels 11 and controls the drive motor to drive the rear wheels 12 in order to expand the wheelbase H. Such relative movement of the front and rear bases 13, 14 is stopped when the moving base 1 is expanded.

As described above, the moving body according to one aspect of the present embodiment is a moving base that includes the front base 13 having the front wheels 11 and the rear base 14 that is arranged behind the front base 13 and has the rear wheels 12. 1, and a seat 2 including a seating portion 21 having a seating surface 21a and legs 22 supporting the seating portion 21 and arranged on the moving base 1, wherein front and rear bases 13 and 14 are provided. , the seats 21 are movable fore and aft relative to each other to allow the wheelbase H between the front wheels 11 and the rear wheels 12 to be expanded and contracted, and the seats 21 are front and rear bases for contracting the wheelbase H. The seat 21 can be moved forward by the movement of the legs 22 accompanying the relative longitudinal movement of the front and rear bases 13 and 14, and the seat 21 can be moved relative to the front and rear bases 13 and 14 for enlarging the wheelbase H. It is possible to move backward by the movement of the leg portion 22 accompanying the forward and backward movement.

In such a mobile body, the mobile base 1 has an enlarged state in which the wheel base H is enlarged so that the mobile body can travel stably, and a contracted state in which the wheel base H is reduced so that the mobile body can make a small turn. The front and rear bases 13, 14 are movable back and forth relative to each other so that the distance between the bases 13 and 14 can be changed. When the movable base 1 is changed from the contracted state to the expanded state, the movement of the leg portion 22 of the seat accompanying the forward movement of the front side base 13 causes the seating portion 21 of the seat 2 to contract. It is possible to move forward from the retracted position in which the movable base 1 is arranged in the expanded state to the seating position in which the movable base 1 is arranged in the expanded state. In the expanded state of the moving base 1, the seat portion 21 is stably maintained while occupying a space within the moving body (hereinafter referred to as "seating space"), so that the user can stably sit on the seat portion 21. be able to. Therefore, the moving body is deployed in such a state that the seating portion 21 of the seat 2 is at the sitting position so that the user can stably sit on the seat, and the moving base 1 is in the expanded state so that the moving body can stably travel. can be easily brought about.

On the other hand, when the moving base 1 changes from the expanded state to the contracted state, the leg portions 22 of the seat 2 move along with the rearward movement of the front base 13, so that the seating portion 21 of the seat 2 moves toward the moving base 1. can be moved forward from the seated position arranged in the expanded state of the moving base 1 to the retracted position arranged in the contracted state. In such a contracted state of the moving base 1, the seat portion 21 moves forward so as to retreat from the seating space. can. Therefore, the moving body can be easily brought into a folded state in which the seat portion 21 is at the retracted position so that a space for placing a load can be secured, and the moving base 1 is in a contracted state so that the moving body can make a small turn. be able to. In addition, it is possible to easily switch between the unfolded state and the folded state of the movable body. Therefore, the mobile body can be efficiently used as a walker, shopping cart, trolley, or the like in a folded state, and the convenience of the mobile 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 attached to the front side base 13 so as to allow the leg portion 22 to pivot with respect to the front side base 13. , the forward movement of the seating portion 21 of the seat 2 causes the rearward movement of the base mounting area 22a of the leg 22 and the leg along with the relative forward and backward movement of the front and rear bases 13, 14 for reducing the wheelbase H. 22, and rearward movement of the seat 21 accompanies relative forward and backward movement of the front and rear bases 13, 14 to enlarge the wheelbase H. and the rearward pivoting of the leg 22 .

Therefore, the change between the seating position and the retracted position of the seat 2 can be interlocked with the change between the expanded state and the contracted state of the moving base 1, so that the seat 2 can be set to the seated position and the moving base 1 can be set to the expanded state. and a folded state in which the seat 2 is in the retracted position and the moving base 1 is in the contracted state, can be easily switched by manual operation of the seat 2.例文帳に追加Therefore, the convenience of the moving body can be enhanced.

In the moving body according to one aspect of the present embodiment, the moving base 1 moves between an enlarged state in which the wheelbase H is enlarged and an enlarged state in which the wheelbase H is enlarged by relative movement of the front and rear bases 13 and 14 back and forth. It can change between a contracted state in which it is contracted to be shorter than . Therefore, when the moving base 1 is expanded, the moving body can travel stably, and when the moving base 1 is contracted, the moving body can make a small turn. Therefore, the convenience of the moving body can be enhanced.

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 contracted. Therefore, in the folded state of the movable body, the seating portion 21 can be efficiently arranged so as to avoid the seating space while standing so that the seating surface 21a thereof faces forward. Furthermore, since the seat portion 21 is arranged in front of the seating space, the seat portion 21 can be used as a screen for baggage placed in the seating space. Therefore, the mobile body can be efficiently used even in a folded state, and the convenience of the mobile body can be enhanced.

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

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 21 having a seating surface 21a. 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. and a retracted position in which the seat portion 21 is retracted forward from the seated position. and a reclined position in front of the standing position, and the seat portion 21 at the retracted position supports the back plate 4 at the reclined position.

Therefore, when the seating portion 21 of the seat 2 is at the seating position, the seating space in the electric vehicle can be occupied and maintained stably, so that the user can stably sit on the seating portion 21.例文帳に追加Furthermore, when the back plate 4 is at the standing position, the user can stably lean against the back plate 4 because the back plate 4 is arranged at the rear and upper standing position with respect to the seat part 21 at the sitting position. When the seat portion 21 is at the seated position and the back plate 4 is at the standing position, the electric vehicle can be deployed so that the user can sit on the seat portion 21 of the seat 2 . .

On the other hand, when the seat portion 21 is at the retracted position, the seat portion 21 moves forward so as to retract from the seating space, and the seat portion 21 at the retracted position supports the back plate 4 at the reclined position. In the seating space of the seat, luggage such as a shopping basket can be stably placed on the back plate 4 . When the seat portion 21 is at the retracted position and the back plate 4 is at the reclined position, the electric vehicle can be used as a walking aid, shopping cart, trolley, or the like. can bring. Therefore, the electric vehicle can be efficiently used as a walker, shopping cart, trolley, or the like in a folded state. In addition, the convenience of the electric vehicle can be enhanced, and in particular, the operability of the electric vehicle can be enhanced in order to enhance the convenience of the electric vehicle.

An electric vehicle according to another aspect of the present embodiment includes an armrest 5 positioned on at least one side in the seat width direction with respect to a seating portion 21 of a seat 2, and a front and rear operation arm configured to enable operation of the electric vehicle. devices 6, 7, the front operating device 6 being supported by the armrests 5, the rear operating device 7 being arranged rearwardly with respect to the back plate 4 when in the standing position, the seat part 21 and the back plate. 4 are in the seated position and the standing position, respectively, the electric vehicle can be operated by the front side control unit 6, and the electric vehicle is in the state where the seat part 21 and the back plate 4 are in the retracted position and the reclined position, respectively. It can be operated by the side control unit 7 .

Therefore, in the unfolded state of the electric vehicle, the user sits on the seating portion 21 of the seat as described above and leans against the back plate 4 as described above. can be operated. At this time, since the back plate 4 is positioned 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 arranged behind a seating portion 21 in a sitting position on a moving base 1, and a back plate 4 that is positioned in an upright position and in a reclined position. It is attached to the frame 3 so as to be pivotable between the positions. Therefore, by a simple process of turning the back plate 4, the back plate 4 can be changed between the upright position and the reclined position, so that the operability of the electric vehicle can be improved in order to improve the convenience of the electric vehicle. can be done.

An electric vehicle according to still another aspect of the present embodiment includes a moving base 1 configured to be electrically drivable and having front wheels 11 and rear wheels 12, a seat 2 including a seating portion 21 having a seating surface 21a, A detection device 8 configured to detect the position of the seat 2 is provided, and the movement base 1 is variable so as to expand and contract the wheelbase H between the front wheels 11 and the rear wheels 12, and the seat 2 is , the seat 21 is movable between a seating position where the seating surface 21a is directed upward and a retracted position where the seating part 21 is retracted forward from the seating position, and the seat 2 in the seating position is movable. When the detection device 8 detects that it has moved, the movement base 1 starts changing to contract the wheel base H, and when the detection device 8 detects that the seat 2 in the retracted position has moved. , the movement base 1 begins to change to enlarge the wheelbase H.

In such an electric vehicle, the movement base 1 has an expanded state in which the wheel base H is expanded so that the electric vehicle can stably travel, and a folded state in which the electric vehicle can make a small turn. H can be changed to a contracted contracted state. Also, if the movement of the seat 2 is to be manually started in order to change the seat 2 from the sitting position to the retracted position, the detection device 8 detects the start of movement of the seat 2, and the movement base 1 is moved by this detection. The wheelbase H can be driven to contract to automatically bring the electric vehicle into a folded state. Further, when the movement of the seat 2 is manually started in order to change the seat 2 from the sitting position to the retracted position, the detection device 8 detects the start of movement of the seat 2, and the movement base 1 is moved by such detection. The wheelbase H can be driven to expand to automatically bring the electric vehicle into a deployed state. Therefore, it is possible to easily switch between the unfolded state and the folded state of the electric vehicle by manually operating the seat 2 .

When the electric vehicle is unfolded, if the seat portion 21 is arranged at the seating position so as to occupy the seating space in the vehicle, the vehicle can be stably driven, and the user can stably operate the vehicle. It can be made possible to sit on the seat portion 21 . In addition, if the seat portion 21 is arranged in the retracted position so as to retract from the seating space in the folded state of the electric vehicle, the electric vehicle can turn in a small radius, and luggage such as a shopping basket can be placed in the seating space. can be placed. Therefore, the electric vehicle can be efficiently used as a walking aid, shopping cart, trolley, or the like in the folded state, and the convenience of the electric vehicle can be enhanced.

In the electric vehicle according to still another aspect of the present embodiment, the seat 2 is in the seated position when the movement base 1 is in the expanded state in which the wheel base H is expanded, and the movement base 1 is in the wheel base H. is at a retracted position when the moving base 1 is in a contracted state shorter than the expanded state, and the detection device 8 is arranged to correspond to the seat 2 in the seating position or in the expanded state. A first sensor 8a arranged so as to be able to detect that the moving base 1 in the position has started a change for contracting the wheelbase H, and a first sensor 8a arranged so as to correspond to the seat 2 in the retracted position. Alternatively, it has a second sensor 8b arranged so as to be able to detect that the moving base 1 in the contracted state has started a change for enlarging the wheelbase H.

Therefore, when the first sensor 8a detects the start of movement of the seat 2 in the seating position or the start of movement of the movement base 1 which is interlocked with it and is in the expanded state, the wheel base H is reduced by such detection. The moving base 1 can be reliably driven, and the electric vehicle can be reliably brought into a folded state. Further, when the second sensor detects the start of movement of the seat 2 at the retracted position or the start of movement of the moving base 1 which is interlocked with it and is in the reduced state, the wheel base H is moved so as to expand according to such detection. The base 1 can be reliably driven, and the electric vehicle can be reliably deployed. Therefore, the user can easily switch between the unfolded state and the folded state of the electric vehicle by manually operating the seat 2, thereby enhancing the convenience of the electric vehicle.

In the electric vehicle according to still another aspect of the present embodiment, one of the front wheels 11 and the rear wheels 12 is driven and the other of the front wheels 11 and the rear wheels 12 is stopped in order to expand and contract the wheelbase H. do. Therefore, one of the front wheels 11 and the rear wheels 12, which are permanently provided for driving the electric vehicle, can be driven and the other can be braked without providing a separate drive mechanism for expanding and contracting the wheelbase H. 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, so that the space for placing luggage such as a shopping basket can be expanded. Therefore, the convenience of the electric vehicle can be enhanced.

"Second Embodiment"
An electric vehicle according to the second embodiment will be described. The electric vehicle according to the present embodiment is configured in the same manner as 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 so that the front wheels 11 and the rear wheels 12 can be reversely driven with respect to each other in order to expand and contract the wheel base H. It is That is, when enlarging the wheel base H, the front wheels 11 are rotationally driven to move the front side base 13 forward of the vehicle, and the rear wheels 12 are rotationally driven to move the rear side base 14 rearward of the vehicle. When the wheel base H is reduced, the front wheels 11 rotate to move the front side base 13 to the rear of the vehicle, and the rear wheels 12 rotate to move the rear side base 14 to the front of the vehicle.

In such an electric vehicle, the front base 13 has a drive motor for rotationally driving each front wheel 11, although not shown in the figure. For example, the drive motor may be arranged 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, the same effects as those of the electric vehicle according to one aspect and another aspect of the first embodiment can be obtained. Further, in the electric vehicle according to the present embodiment, in order to expand and contract the wheelbase H, except for the effect based on the configuration in which one of the front wheels 11 and the rear wheels 12 is driven and the other is stopped, Effects similar to those of the electric vehicle according to still another aspect of the first embodiment can be obtained.

Furthermore, in the electric vehicle according to the present embodiment, the front wheels 11 and the rear wheels 12 can be reversely driven with respect to each other so as to expand and contract the wheelbase H. Therefore, without providing a separate drive mechanism for expanding and contracting the wheelbase H, the wheelbase H is expanded and contracted by driving the front wheels 11 and the rear wheels 12 that are permanently provided for driving the electric vehicle. can be made As a result, the space for installing the drive mechanism in the electric vehicle can be reduced, so that the space for placing luggage such as a shopping basket can be expanded. Therefore, the convenience of the electric vehicle can be enhanced.

"Third Embodiment"
An electric vehicle according to the third embodiment will be described. The electric vehicle according to this embodiment is configured in the same manner as 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 has the first or second position except that the back plate 104 is movable along the frame 3 between the standing position and the reclined position. It has a back plate 104 that is configured similarly to the back plate 4 of the second embodiment. Further, the back plate 104 is preferably configured as follows. The back plate 104 has a base end portion 104a and a front end portion 104b located at the lower end side and the upper end side in the vertical direction of the vehicle, respectively, in the upright position. A base end portion 104 a of the back plate 104 is connected to the rear end region of the seating portion 21 of the seat 2 via a connecting member 141 .

Specifically, the two connecting members 141 each have a back plate side attachment portion 141 a attached to both ends in the seat width direction of the base end portion 104 a of the back plate 104 . The back plate side attachment portion 141a is attached to the base end portion 104a of the back plate 104 so as to be capable of turning about a turning axis 141b extending in the seat width direction with respect to the base end portion 104a of the back plate 104. As shown in FIG.

The two connecting members 141 also have seat-side attachment portions 141c attached to both ends in the seat width direction of the rear end portion of the seating portion 21, respectively. The seat-side mounting portion 141c is arranged with a space from the back-plate-side mounting portion 141a. The seat-side attachment portion 141c is attached to the rear end region of the seat portion 21 so as to be pivotable about the 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 turnable 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 struts 31 of the frame 3 about a rotation axis 104c extending in the seat width direction, and It is attached to the two struts 31 so as to be slidable along the two struts 31 together with the pivot axis 104c.

When the back plate 104 is in the upright position, the base end portion 104a of the back plate 104 is positioned above the vehicle with respect to the seat support mechanism 32 of the column 31 of the frame 3 . Further, in a state where the seat 2 is at the retracted position and the back plate 104 is at the reclined position, the base end portion 104a of the back plate 104 is supported by the rear end region of the seating portion 21 of the seat 2 via the connecting member 141. and the tip 104 b of the back plate 104 is supported by the seat support mechanism 32 of the frame 3 .

The back plate 104 moves between the standing position and the reclined 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 reclined position, the back plate 104 turns toward the front of the vehicle about the turning axis 104c of the tip portion 104b, and the tip portion 104b of the back plate 104 moves toward the column 31. It moves from above the vehicle to below the vehicle. Further, when the seat 2 reaches the retracted position and the front end 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 horizontal direction of the vehicle. At this time, the back plate 104 reaches the lying down position. When the back plate 104 moves from the lying position to the standing position, the opposite operation is performed.

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 one aspect of the first embodiment and another aspect. In addition, in the electric vehicle according to the present 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 upright position and the reclined position, it is different from the first embodiment. It is possible to obtain the same effect as the electric vehicle according to one aspect of .

Furthermore, the electric vehicle according to the present embodiment further includes a frame 3 arranged on the movement base 1 behind the seat portion 21 when it is in the seated position, and the back plate 104 is positioned between the upright position and the reclined position. It is movable along frame 3 in between. Therefore, by a simple process of moving the back plate 104 along the frame 3, the back plate 104 can be changed between the standing position and the reclined position. Operability can be improved.

"Fourth Embodiment"
An electric vehicle according to the fourth embodiment will be described. The electric vehicle according to this embodiment is configured in the same manner as the electric vehicle according to any one of the first to third embodiments, except for the configuration described below. Therefore, when the components of the electric vehicle according to the present embodiment are configured in the same manner as the components of 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 has a movement base 1 configured 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 . Moving base 201 includes a front base 213 having front wheels 11 and a rear base 214 having rear wheels 12 . The rear base 214 is arranged behind the vehicle with respect to the front base 213 .

Such front and rear bases 213, 214 are configured in the same manner as the front and rear bases 13, 14 of the moving base 1 in any one of the first to third embodiments, respectively, except as further described below. be done. Front and rear bases 213 and 214 of the moving base 201 are connected to each other so as to be able to turn about a turning axis 201a extending in the width direction of the vehicle. More specifically, the front base 213 has two front side members 213a spaced apart from each other in the vehicle width direction. The rear base 214 has two rear side members 214a spaced apart from each other in the vehicle width direction.

The front and rear side members 213a, 214a are constructed similarly to the front and rear side members 13a, 14a, respectively, in any one of the first to third embodiments, except for the points described below. The rear end portions of the two front side members 213a in the vehicle front-rear direction are respectively turnable about the turning axis 201a with respect to the front end portions of the rear side members 214a in the vehicle front-rear direction by means of the turning coupling mechanism 217. so that these front ends are attached. Such a moving base 201 has such a swivel 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 movable 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 rotates about the rotation axis 11a of the front wheel 11 so as to be lifted upward in the vehicle. In addition, the front end portion of the rear base 214 in the vehicle front-rear direction turns about the rotational axis 12a of the rear wheel 12 so as to be lifted upward in the vehicle. As a result, the front and rear bases 213 and 214 are bent in a substantially mountain shape so that the turning connection mechanism 217 is the apex. The reverse operation is performed when the moving base 201 changes from the contracted state to the expanded state.

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

13 to 17, which are used to explain the electric vehicle according to the present embodiment, the detection device and the like are omitted. 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 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 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, like the moving base 1 in any one of the first to third embodiments, is configured to be variable so as to expand and contract the wheelbase H between the front wheels 11 and the rear wheels 12. .

Moving base 301 includes a front base 313 having front wheels 11 and a rear base 314 having rear wheels 12 . The rear base 314 is arranged behind the vehicle with respect to the front base 313 . The front and rear bases 313, 314 respectively correspond to the front and rear bases 13, 14 in any one of the first to third embodiments. The front and rear bases 313, 314 are positioned relative to each other to allow the wheelbase H to be expanded and contracted in the same manner as the front and rear bases 13, 14 in any one of the first to third embodiments. It is configured to be relatively movable in the longitudinal direction of the vehicle.

The front 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 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 protrude in the vehicle width direction from the vehicle front-rear direction rear end portion of the front side member 313a. Although details will be described later, the leg portion 322 of the seat 302 is attached to the pivot shaft 317 . Such pivot shaft 317 is arranged 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 positioned at the front end of the rear side member 314a in the vehicle front-rear direction when the moving base 301 is expanded. The pivot shaft 317 may also be positioned near the rear wheels 12 in the contracted state of the travel base 301 .

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

The seat 302 also has two seat side members 323 corresponding respectively 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 when the seat 302 and the back plate 304, which will be described later, are in the retracted position and the reclined position, respectively. 16, the back plate support mechanism 324 is the rear end of the seat portion 21 in the front-rear direction of the seat. However, the present invention is not limited to this, and the back plate support mechanism protrudes downward in the seat vertical direction from each seat side member in the same manner as the back plate support mechanism of any one of the first to third embodiments. It may be formed as

Each leg portion 322 preferably extends so as to be inclined from the rear to the front in the front-rear direction of the seat as it goes downward from above in the up-down direction of the seat. Each leg 322 preferably extends downward in the seat up-down direction from the rear end of the corresponding seat side member 323 in the seat front-rear direction.

Each leg 322 has a base attachment area 322 a configured to attach the leg 322 to the front base 313 . The base mounting section 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 pivot shaft 317 can be inserted. The attachment slot 322b extends along the longitudinal direction of the leg 322. As shown in FIG. When the front base 313 moves in the longitudinal direction of the vehicle with respect to the rear base 314, the turning shaft 317 moves in the long mounting hole 322b along the longitudinal direction of the long mounting hole 322b.

As will be described in greater detail below, each leg 322 has a frame attachment area 322c configured to attach to frame 303 such that leg 322 is pivotable relative to frame 303, described below. The frame attachment area 322c is located between the seat 21 and the base attachment area 322a. The base attachment area 322a of each leg 322 is located at the lower end of the leg 322 in the seat vertical direction, and the frame attachment area 322c of each leg 322 is located in the middle of the leg 322 in the seat vertical direction. should be located.

"About frames"
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 struts 331 corresponding respectively to the two struts 31 in any one of the first to third embodiments. Each strut 331 has a seat pivot attachment 331a configured to attach the frame attachment section 322c of the corresponding leg 322 thereto. The frame attachment section 322c is attached to the seat pivot attachment portion 331a so as to be pivotable about a pivot axis 322d extending in the vehicle width direction.

The seat pivot mounting 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 pivot mounting portion 331a is preferably arranged in a region below each support 331 positioned below the vehicle with respect to the seat portion 21 at the seated position. A lower region of the strut 331 is preferably formed to protrude in a substantially triangular shape toward the front of the vehicle. In this case, the seat turning mounting portion 331a may be positioned at the top of the lower region of the support 331 projecting forward of the vehicle.

Furthermore, although not clearly shown, the frame 303 has a seat support mechanism and connecting members similar to the seat supporting mechanism 32 and 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. FIG. The back plate 304 has a proximal end portion 304a, a distal end portion 304b, and a turning axis 304c corresponding to the proximal end portion 4a, the distal end portion 4b, and the turning axis 4c in any one of the first to third embodiments, respectively. 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 pivot axis 304c is located at the proximal end 304a.

"Armrests and front and rear operating devices"
As shown in FIGS. 13 and 15 to 17, the electric vehicle according to this 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 this embodiment has front and rear operating devices 306 and 307 corresponding to the front and rear operating devices 6 and 7 in any one of the first to third embodiments, respectively. The electric vehicle has two armrests 305 , two front operating devices 306 and two rear operating 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 following points. The front side operating device 306 is a joystick. However, the front operating device is not limited to this. Two front manipulators 306 are attached to the front ends of the two armrests 305, respectively. However, the vehicle may also have one front operating device attached to one of the two armrests. It should be noted that such two front operating devices 306 can also be applied to the vehicles of the first to fourth embodiments.

The rear operating device 307 is configured in the same manner as the rear operating device 7 in any one of the first to third embodiments, except for the following points. The rear side operating device 307 is a joystick. However, the front operating device is not limited to this. The two rear manipulators 307 are attached to two posts 331 of the frame 303 respectively. However, the rear operating 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 front end portion 304b of the back plate 304 is curved from the front of the vehicle to the rear of the vehicle as the back plate 304 is in the upright position from the bottom of the vehicle to the top of the vehicle. However, the back plate is not limited to this. For example, when the back plate is in the upright position, the tip of the back plate is inclined from the front to the rear of the vehicle as it goes from the bottom of the vehicle to the top of the vehicle. good too. Furthermore, the tip of the back plate may be formed in a substantially L shape. The arrangement of the back plate 304 can also be applied to the arrangement of the back plate 4 in the first to fourth embodiments.

Such a vehicle according to the present embodiment can perform a transforming motion similar to the example of the transforming motion of the vehicle according to the first embodiment described above. Furthermore, in the moving object according to the present embodiment, the following effects can be obtained in addition to the effects of the moving object according to one aspect of the first embodiment.

In the vehicle according to one aspect of the present embodiment, the leg 322 of the seat 302 is configured to be attached to the frame 303 so as to allow the leg 322 to pivot with respect to the frame 303. Frame attachment area 322c and a frame attachment area 322c is located between the seat 21 and the base attachment 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 movable body, so that the movable body can be used efficiently. Therefore, the convenience of the moving body can be enhanced.

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 standing position. Therefore, when the moving base 301 is in the expanded state and the passenger seated on the seat 302 is operating the front side operating device 306, the back plate 304 restricts the passenger's access to the rear side operating device 307. can be done. Furthermore, even when the moving base 301 is in the expanded state and the rear operating device 307 is inoperable, unnecessary access to the rear operating device 307 by the occupant can be restricted, resulting in damage to the rear operating 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 its technical ideas.

DESCRIPTION OF SYMBOLS 1,201,301...Movement base 11...Front wheel 12...Rear wheel 2,302...Seat 21...Seating part 21a...Seating surface 8...Detector 8a...First sensor 8b...Second sensor , H... wheel base

Claims (5)

a moving base having front wheels and rear wheels and configured to be able to travel by being electrically driven by a drive motor;
a seat including a seating portion having a seating surface;
a detection device configured to detect the position of the sheet ;
a control device electrically connected to the drive motor and the sensing device;
An electric vehicle comprising
The moving base is configured to be variable so as to expand and contract the wheelbase between the front wheels and the rear wheels by driving the drive motor ,
The seat has a seating position in which the seating surface is directed upward, and a seating position in which the seating portion is retracted forward from the seating position and the seating surface is directed forward . configured to be movable between the retracted positions by manual operation ,
When the detection device detects that the seat in the seating position has started to move to the retracted position, the control device causes the movement base to move in conjunction with the movement of the seat to the retracted position. configured to control the drive motor to initiate a change to reduce the wheelbase;
When the detection device detects that the seat in the retracted position has started to move to the seating position, the control device causes the movement base to move in conjunction with the movement of the seat to the seating position. An electric vehicle configured to control the drive motor to initiate a change to enlarge the wheelbase. 2. The electric vehicle according to claim 1, wherein said seat is attached to said movement base via a link member configured so that said seat can move according to expansion and contraction of said wheel base. The seat is at the sitting position when the movement base is in an expanded state with the wheel base expanded, and the movement base contracts the wheel base to be shorter than the expanded state of the movement base. configured to be at the retracted position when in the retracted state,
The detection device is arranged to correspond to the seat in the sitting position, or is capable of detecting that the movement base in the expanded state has started a change for contracting the wheel base. and a sensor arranged to correspond to the seat in the retracted position or capable of detecting that the moving base in the contracted state has started a change for enlarging the wheel base. 3. The electric vehicle of claim 2, further comprising a sensor positioned to detect One of the front wheels and the rear wheels is driven and the other of the front wheels and the rear wheels is stopped in order to expand and contract the wheelbase. The electric vehicle according to item 1. The electric vehicle according to any one of claims 1 to 3, wherein said front wheels and said rear wheels are configured to be reversely driven with respect to each other in order to expand and contract said wheelbase.

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