WO2017042957A1

WO2017042957A1 - Baby carriage

Info

Publication number: WO2017042957A1
Application number: PCT/JP2015/075834
Authority: WO
Inventors: 順一浅野; 山口　勲
Original assignee: コンビ株式会社
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2017-03-16
Also published as: CN107635850B; CN107635850A; HK1243683A1; JP6676059B2; KR102208824B1; TW201710135A; JPWO2017042957A1; TWI718181B; KR20180051436A

Abstract

This baby carriage 1 is equipped with: a baby carriage body 2 which supports a plurality of wheels 4; a drive source 5 which is supported by the baby carriage body 2 and provides driving force to at least one of the plurality of wheels 4; a detecting element 6 which detects the information related to the travel operation input to the baby carriage body 2; a control device 7 which controls the drive source 5 on the basis of the information detected by the detecting element 6, and adjusts driving force from the drive source 5 to the wheel 4; and a wheel locking device 80 which is provided to the baby carriage body 2 so as to be capable of switching between a lock state S1 in which the wheel 4 is locked, and an unlock state S2 in which the wheel 4 is unlocked. While the wheel locking device 80 is in the lock state S1, the transmission of the driving force from the drive source 5 to the wheel 4 is prevented.

Description

baby carriage

The present invention relates to a baby carriage that drives wheels by a driving source.

For example, JP2011-68336A discloses a baby carriage with an electric motor. In the baby carriage described in JP2011-68336A, when the lever is pressed, the electric motor connected to the wheel is driven. In particular, the baby carriage described in JP2011-68336A is self-propelled by an electric motor. That is, the baby carriage described in JP2011-68336A can travel independently only by the driving force of the electric motor without being pushed by the operator.

While the baby carriage is stopped, the wheel lock device is operated to maintain the state where the rotation of the wheel is restricted. However, in the baby carriage described in JP2011-68336A, when the lever is pressed in a state where the wheel lock device restricts the rotation of the wheel, the electric motor is driven. When the electric motor tries to drive the wheel in a state where the rotation of the wheel is restricted, the wheel cannot be driven because the wheel is locked, and as a result, an excessive load is applied to the electric motor.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a baby carriage that suppresses an excessive load on a drive source in a state where rotation of a wheel is restricted by a wheel lock device. .

A baby carriage according to the present invention includes a baby carriage body,
A plurality of wheels that are supported by the baby carriage body and rotate about each rotation axis;
A driving source supported by the baby carriage body and providing a driving force to at least one of the plurality of wheels;
A detection element for detecting information related to a driving operation input to the baby carriage body;
A control device that controls the drive source based on information detected by the detection element and adjusts the driving force from the drive source to the wheel;
It is possible to switch between a locked state that restricts rotation of at least one of the plurality of wheels around its own rotation axis and a release state that releases the state of restricting rotation of the wheel. A wheel locking device provided in the baby carriage body to be,
With
While the wheel lock device is in the locked state, the driving force from the drive source is not transmitted to the wheels.

The baby carriage according to the present invention further includes a lock sensor that detects a state of the wheel lock device, and the control device is configured to detect the state of the wheel lock device in the locked state by the lock sensor. You may control so that the driving force from a drive source is not transmitted to the said wheel.

In the baby carriage according to the present invention, the wheel lock device includes an operation member movable between a lock position and a release position, and a lock member connected to the operation member via a connecting member, and the lock The member engages with the wheel while the operation member is located at the lock position and restricts the wheel from rotating around its own rotation axis, while the operation member is located at the release position. May be separated from the wheel to release the restriction of the wheel. In addition, the control device further includes a lock sensor that detects the position of the operation member, and the control device detects the position of the operation member from the drive source while the lock sensor detects that the operation member is positioned at the lock position. You may control so that a driving force is not transmitted to the said wheel.

In the baby carriage according to the present invention, the wheel lock device may restrict at least a wheel provided with a driving force from the drive source from rotating about its own rotation axis in the locked state.

In the baby carriage according to the present invention, of the plurality of wheels, a wheel provided with a driving force from the driving source is a rear wheel, and the front wheel of the plurality of wheels is supported by the baby carriage body via a caster. It may be.

In the baby carriage according to the present invention, the baby carriage main body includes a frame main body that supports the plurality of wheels, and a handle that is connected to the frame main body, and the detection element is provided on the handle. Information regarding the applied load may be detected.

According to the present invention, the driving force from the driving source is not transmitted to the wheel while the rotation of the wheel is restricted by the wheel lock device. For this reason, it can prevent that a drive source tries to drive a wheel in the state which controlled rotation of a wheel, and it can control that an excessive load is applied to a drive source. Further, since the driving force applied to the wheels by the driving source can be adjusted in accordance with the traveling operation of the baby carriage, the baby carriage can be operated as intended.

The figure which shows the baby carriage by one Embodiment from a front in the expansion | deployment state. The figure which shows the baby carriage in the unfolded state shown in FIG. 1 from the side with the seat unit removed. The figure which shows the baby carriage shown in FIG. 2 from the side in a folding state. The block diagram which shows typically the structure of the baby carriage shown in FIG. The perspective view which shows the drive element and wheel of the baby carriage shown in FIG. 1 from back. The circuit diagram which shows the connection relation of the DC motor which comprises a drive element. The top view which expands and shows the handle | steering-wheel of the baby carriage shown in FIG. The figure for demonstrating the structure of the detection element provided in the steering wheel of the baby carriage shown in FIG. FIG. 9 is a circuit diagram of the detection element shown in FIG. 8. The graph which shows the example which adjusts the driving force by a drive element based on the information from a detection element. The perspective view which shows the wheel locking device provided in the baby carriage shown in FIG. 1 in a release state. The perspective view which shows the wheel locking device provided in the baby carriage shown in FIG. 1 in a locked state. The perspective view which expands and shows a part of wheel locking device shown in FIG. The side view which looked at the wheel locking device shown in FIG. 12 from the side. The figure for demonstrating an effect | action of the detection element when pushing the steering wheel of the baby carriage shown in FIG. 1 ahead. The figure for demonstrating an effect | action of the detection element when pushing down the steering wheel of the baby carriage shown in FIG. 1, and going down a slope. The figure for demonstrating an effect | action of the detection element when the handle | steering-wheel of the baby carriage shown in FIG. 1 is pulled back. The perspective view for demonstrating a state when the baby carriage shown in FIG. 1 is turned. The perspective view which shows the other example which drives a wheel. The perspective view which shows the structure of the wheel locking device provided in the baby carriage shown in FIG. The side view which expands and shows the lock member of the left side which comprises the wheel locking device shown in FIG. The side view which shows the lock member of the left side shown in FIG. 21 in the state which locked the wheel.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 thru | or FIG. 22 is a figure for demonstrating the baby carriage 1 by one Embodiment. Among these, FIG. 1 is a figure which shows the baby carriage 1 by one Embodiment from a front direction. In the baby carriage 1 shown in FIG. 1, a first seat unit 8 a and a second seat unit 8 b are supported on the baby carriage body 2. The first seat unit 8a and the second seat unit 8b are places where infants are seated, and are arranged side by side. The

seat units

8a and 8b are provided with

hoods

9a and 9b so as to protect the infant seated on the

seat units

8a and 8b from sunlight and wind.

In this specification, the terms “front”, “rear”, “upper”, “lower”, “front / rear direction”, “vertical direction” and “left / right direction” for the baby carriage 1 and its components are particularly When there is no instruction, “front”, “rear”, “up”, “down”, “front / rear direction”, “up / down” with respect to an operator who operates the baby carriage 1 in the unfolded state while holding the handle 20 "Direction" and "left-right direction". More specifically, the “front-rear direction d1” corresponds to the front and back direction of the paper surface in FIG. Unless otherwise specified, “front” is the side on which the operator who presses the handle faces, and the front side of the paper surface in FIG. 1 is the front. On the other hand, the “vertical direction d3” is a direction orthogonal to the front-rear direction and orthogonal to the ground plane. Therefore, when the ground contact surface is a horizontal plane, the “vertical direction d3” indicates the vertical direction. The “left-right direction d2” is also the width direction and is a direction orthogonal to both the “front-rear direction d1” and the “up-down direction d3”.

FIG. 2 shows the baby carriage 1 from the side with the

seat units

8a and 8b removed. The baby carriage main body 2 shown in FIG. 2 includes a frame main body 10 and a handle 20 connected to the frame main body 10.

In the frame body 10, an upper frame 12 that supports two

seat units

8a and 8b is connected to a base frame 11 on which a plurality of wheels 4 are supported. The upper frame 12 is supported in an inclined state with respect to the base frame 11. A front portion of the upper frame 12 and a front portion of the base frame 11 are connected via a front link member 13, and an intermediate portion of the upper frame 12 and a rear portion of the base frame 11 are connected via an intermediate link member 14. Yes. The front link member 13 and the intermediate link member 14 function as links and allow the upper frame 12 to rotate with respect to the base frame 11.

Particularly, the base frame 11 is provided with left and right side base frames 11a and 11b that are spaced apart in the left-right direction d2. The rear ends of the left and right side base frames 11a and 11b are connected by a rear base frame 11c. In the present embodiment, the left and right side base frames 11a and 11b and the rear base frame 11c are integrally formed by bending and molding a single pipe. However, the left and right side base frames 11a and 11b and the rear base frame 11c may be formed as separate components.

A front wheel 41 and a rear wheel 42 are attached to each

side base frame

11a, 11b. In the present embodiment, each front wheel 41 is supported by the side base frames 11a and 11b via the casters 3 so as to be rotatable and turnable. The caster 3 supports the front wheel 41 so as to be rotatable about the rotation axis Ar1, and is capable of turning about a turning axis As1 that is non-parallel to the rotation axis Ar1 and parallel to the orthogonal direction in the present embodiment. That is, the front wheel 41 is supported by the caster 3 so that it can rotate and its direction can be changed.

On the other hand, each rear wheel 42 located behind the front wheel 41 is not supported by a caster so as to be able to turn. In the present embodiment, each rear wheel 42 is rotatably supported by a drive shaft 51b (see FIG. 5) of the drive source 5 described later, and is not rotatable.

The upper frame 12 is provided with left and right side

upper frames

12a and 12b spaced apart in the left-right direction d2. An intermediate frame 12c is disposed between the left and right side

upper frames

12a and 12b. In the present embodiment, the first seat unit 8a is disposed between the left side upper frame 12a and the intermediate frame 12c, and the second seat unit 8b is disposed between the right side upper frame 12b and the intermediate frame 12c. Has been.

The rear ends of the left and right side

upper frames

12a and 12b and the intermediate frame 12c are connected by a rear upper frame 12d. A handle 20 is attached to the rear upper frame 12d. The handle 20 is a part operated by the operator's hand. The handle 20 will be described later with reference to FIGS.

In the illustrated example, the left and right side

upper frames

12a and 12b and the rear upper frame 12d are integrally formed by bending and molding a single pipe. However, the left and right side

upper frames

12a and 12b and the rear upper frame 12d may be formed as separate components.

The front ends of the left and right side

upper frames

12a and 12b are connected by a horizontal connecting bar 12e and an upper side link frame 13a. Among these, the horizontal connection bar 12e is formed linearly along the left-right direction d2, and the front end of the intermediate frame 12c is connected to an intermediate portion of the horizontal connection bar 12e.

The upper side link frame 13a functions as a link, and has a curved shape protruding in a region in front of the lateral connection bar 12e. And the base side link frame 13b is spanned by the front part of the upper side link frame 13a, and the front end of the left and right side base frames 11a and 11b. The base side link frame 13b is fixed to the upper side link frame 13a at the front end thereof, and the left and right rear ends thereof are rotatably connected to the left and right side base frames 11a and 11b via the lateral connection link bar 13c. Yes. The lateral link bar 13c is formed in a straight line along the left-right direction d2, and is pivotally connected to the front ends of the left and right

side base frames

11a, 11b. The upper side link frame 13a, the base side link frame 13b, and the lateral connection link bar 13c constitute a front link member 13 that functions as a link.

The left and right intermediate link members 14 are stretched between the middle portions of the left and right side

upper frames

12a and 12b and the rear portions of the left and right side base frames 11a and 11b. Each intermediate link member 14 functions as a link and is rotatable with respect to both the side

upper frames

12a and 12b and the side base frames 11a and 11b.

The baby carriage 1 having the above frame structure can be folded from the unfolded state shown in FIGS. 1 and 2 to the folded state shown in FIG. FIG. 3 is a view showing the baby carriage 1 shown in FIG. 2 from the side in a folded state.

First, the side

upper frames

12a and 12b and the upper side link frame 13a are unlocked, and the handle 20 is lowered downward using its own weight. By this operation, the upper side link frame 13a, the base side link frame 13b, and the intermediate link member 14 are rotated in the counterclockwise direction in FIG. 2, and the upper frame 12 is folded so as to overlap the base frame 11.

As a result of the above folding operation, as shown in FIG. 3, the base frame 11 and the upper frame 12 approach each other in a side view of the baby carriage 1 and are arranged substantially in parallel. On the other hand, in order to return the baby carriage 1 from the folded state shown in FIG. 3 to the unfolded state shown in FIG. 2, a procedure reverse to the above-described folding operation may be performed.

By the way, in the baby carriage 1 according to the present embodiment, the drive source 5 is connected to the wheels 4 in order to reduce the burden on the operator. However, since the conventional baby carriage was configured as a so-called self-propelled baby carriage as described in the background art section, it was not easy to operate the baby carriage as intended. Therefore, the baby carriage 1 according to the present embodiment is configured as an auxiliary drive type hand-rolled baby carriage that provides driving force to the wheels 4 in accordance with the traveling operation of the operator.

FIG. 4 schematically shows a mechanism for assisting driving of the wheels 4 in a block diagram. As shown in FIG. 4, drive

elements

51 and 52 are connected to some of the plurality of wheels 4. The driving

elements

51 and 52 are components that drive the wheel 4, in other words, components that provide driving force to the wheel 4. In the present embodiment, two drive elements, that is, a first drive element 51 and a second drive element 52 are provided, the first drive element 51 drives the left rear wheel 42, and the second drive element 52 is on the right rear. The wheel 42 is driven.

FIG. 5 shows an example of the configuration of the

drive elements

51 and 52. As shown in FIG. 5, each

drive element

51, 52 is composed of

drive shafts

51a, 52a connected to the corresponding rear wheel 42 and

DC motors

51b, 52b for driving the

drive shafts

51a, 52a. Has been. One end of each of the

drive shafts

51a and 52a is connected to the corresponding rear wheel 42, and supports the rear wheel 42 so as to be rotatable about the rotation axis Ar2, but does not support the rotation. The other ends of the

drive shafts

51a and 52a are connected to the main shafts of the

DC motors

51b and 52b via power transmission elements (for example, gears) (not shown). The

drive shafts

51a and 52a may be configured integrally with the main shafts of the

DC motors

51b and 52b, or may be configured as separate members.

The direct

current motors

51b and 52b are arranged in a storage box 70 spanned between the left and right side base frames 11a and 11b, and are supported by the side base frames 11a and 11b in the storage box 70. FIG. 6 is a circuit diagram showing the connection relationship between the

DC motors

51b and 52b. As shown in FIG. 6, the

DC motors

51 b and 52 b of the two

drive elements

51 and 52 are connected in series to the power supply 75. The two

DC motors

51b and 52b connected in series contribute to adjusting the driving force in accordance with the load from the ground plane, which will be described later.

Returning to FIG. 4, the

drive elements

51 and 52 are connected to the control device 7 and controlled by the control device 7. A detection element 6 is further connected to the control device 7, and information from the detection element 6 is taken as an input. Then, the control device 7 controls the driving

elements

51 and 52 based on the information from the detection element 6 to adjust the driving force from the driving

elements

51 and 52 to the wheels 4. The control device 7 is connected to a power source 75 that is detachably fixed to the storage box 70. Such a control device 7 can be realized, for example, as a microcontroller provided with a central processing unit (CPU) and a register (REGISTER) or a programmable controller (PLC).

The detection element 6 detects information related to the driving operation input to the baby carriage body 2. The information regarding the driving operation detected by the detection element 6 is not particularly limited as long as it is information input from the operator to the baby carriage body 2. As an example of information relating to the traveling operation, information relating to the load from the hand operating the handle 20 and information relating to the rotational speed of the wheel 4 relating to the speed at which the operator travels the baby carriage 1 may be detected.

Returning to FIG. 2, the detection element 6 according to the present embodiment is provided on the handle 20, and information relating to the load applied to the handle 20, in other words, information capable of specifying the load applied to the handle 20. It is comprised so that it may detect. First, the configuration of the handle 20 will be described, and then the detection element 6 provided on the handle 20 will be described.

FIG. 7 shows the handle 20 in an enlarged manner. As shown in FIG. 7, the handle 20 is provided with a grip 21 on which an operator's hand can be placed, and the handle body 22 connects the grip 21 and the baby carriage body 2. The handle body 22 is fastened to the upper frame 12 at a connection point c1 with the upper frame 12.

Particularly, as an element constituting the handle body 22, a column 22a extends from the rear upper frame 12d, and side bars 22b and 22c are arranged on both sides of the column 22a. The grip 21 is configured as two

grip portions

21a and 21b arranged at intervals in the left-right direction d2, and the left grip portion 21a is spanned between the left side bar 22b and the column 22a, and the right side The grip portion 21b is stretched between the right side bar 22c and the column 22a.

FIG. 8 shows an enlarged view of the detection element 6 provided in the column 22a, and FIG. 9 shows a circuit diagram of the detection element 6. As shown in FIGS. 8 and 9, a plurality of strain gauges 61 as the sensing element 6 are attached to the inner square bar inner square bar 22d in the column 22a. The plurality of strain gauges 61 constitute a bridge circuit so as to measure the strain of the handle body 22. In the example shown in FIG. 8, two strain gauges 61 are disposed on the upper surface of the square inner square member 22d, and two strain gauges 61 are disposed on the lower surface of the inner square member 22d. 61 are configured identically. In addition, although the illustrated inner square bar 22d is hollow, it may be solid.

FIG. 10 is a graph showing an example of control for determining the driving force provided by the driving

elements

51 and 52 in accordance with the strain detected by the strain gauge 61. In the graph of FIG. 10, the horizontal axis indicates the strain detected by the strain gauge 61, and the strain gauge 61 pasted on the upper surface of the inner square bar 22d extends or is pasted on the lower surface of the inner square bar 22d. When the attached strain gauge 61 is contracted, a positive value is set, and when the strain gauge 61 applied to the upper surface of the inner square member 22d is contracted or strain applied to the lower surface of the inner square member 22d. A negative value is obtained when the gauge 61 extends. The vertical axis indicates the driving force that drives the wheel 4, where the driving force that rotates the wheel 4 in the forward direction is a positive value, and the driving force that rotates the wheel 4 in the backward direction is a negative value.

As shown in FIG. 10, when the magnitude of the strain detected by the strain gauge 61 is smaller than the lower limit value α1, the control device 7 performs control so that the driving force by the driving

elements

51 and 52 is not provided to the wheels 4. Thereby, even if disturbance and unintended operation are added to the baby carriage 1, it can prevent that the baby carriage 1 moves unintentionally.

When the magnitude of the strain detected by the strain gauge 61 becomes larger than the lower limit α1, the control device 7 causes the driving force by the driving

elements

51 and 52 to be proportional to the magnitude of the strain detected by the strain gauge 61. Control to provide to. In the graph of FIG. 10, when the target strain gauge 61 is extended, a driving force for rotating the wheel 4 in the forward direction is provided, and when the target strain gauge 61 is contracted, the wheel 4 is moved backward. Provides driving force to rotate in the direction.

On the other hand, when the magnitude of the strain applied to the handle 20 becomes larger than the upper limit value α2, the control device 7 performs control so that the driving force by the driving

elements

51 and 52 is provided to the wheel 4 as the upper limit driving force F.

Now, when the baby carriage 1 having such a drive mechanism is stopped, the wheel lock device 80 shown in FIG. 5 is operated to keep the wheel 4 locked. Hereinafter, with reference to FIG.11 and FIG.12, the wheel locking device 80 which locks the wheel 4 is demonstrated. FIG. 11 is a perspective view showing the wheel lock device 80 in a release state S2 in which the restriction on the rotation of the wheel 4 is released. FIG. 12 is a perspective view showing the wheel locking device 80 in a locked state S 1 that restricts the rotation of the wheel 4.

As shown in FIGS. 11 and 12, the wheel lock device 80 is for restricting at least one wheel 4 from being locked, that is, preventing at least one wheel 4 from rotating about the rotation axis Ar2. . The wheel lock device 80 can be switched between a lock state S1 shown in FIG. 12 and a release state S2 shown in FIG.

An operation member 81 constituting the wheel lock device 80 is disposed around the rear base frame 11c. A lock member 85 is connected to the operation member 81 via a connecting member 82. In the present embodiment, one locking member 85 is provided on each of the left and right sides, and each locking member 85 regulates the rotation of the rear wheel 42 on the corresponding side.

The operation member 81 is a part that is operated by an operator to restrict the rotation of the wheel 4. Mount frames 11d are stretched over the left and right side base frames 11a and 11b, and the operation member 81 is supported by the mount frame 11d so as to be able to turn through other components. The mount frame 11d is positioned below the storage box 70 shown in FIG. 5, and most of the operation member 81 supported on the mount frame 11d is stored in the storage box 70.

FIG. 13 shows an enlarged view of the wheel lock device 80 shown in FIG. As shown in FIG. 13, a guide wall 81a fixed to the mount frame 11d is provided as a component of the operation member 81, and the rotating body 81b slides along the guide wall 81a. The rotating body 81b includes a rotating body main body 81c guided by the guide wall 81a, and an operation lever 81d extends rearward from the rotating body main body 81c. The operation lever 81d is a portion operated by the operator's hand.

In the present embodiment, the guide wall 81a is disposed along an arcuate path, and the outer edge of the rotating body 81c is also molded along the arcuate path. Therefore, when the operation lever 81d is switched between the position shown in FIG. 11 and the position shown in FIG. 12, the rotary body 81c is guided along the guide wall 81a and turns.

On the other hand, an extending piece 81e extends forward from the rotating body main body 81c. A connecting member 82 is connected to the front end of the extending piece 81e via a fulcrum pin 83. The fulcrum pin 83 is fixed to the mount frame 11d via other components. Therefore, the operation member 81 rotates about the fulcrum pin 83 between the lock position P1 shown in FIG. 11 and the release position P2 shown in FIG.

The connecting member 82 is a component that moves the left and right lock members 85 in conjunction with the movement of the operation member 81. As an element constituting the connecting member 82, one end of the link bar 82a is pivotally attached to the extending piece 81e of the operation member 81, and the left connecting arm 82b is also connected to one end of the link bar 82a. On the other hand, the right connection arm 82c is connected to the other end of the link bar 82a.

The link bar 82a is connected to one end of the link bar 82a, and the link bar 82a is connected to the other end of the link bar 82a. When rotating, the left and right connecting

arms

82b and 82c move in the opposite directions in the left-right direction d2. That is, when the left connecting arm 82b is pushed to the left, the right connecting arm 82c is pushed to the right, and when the left connecting arm 82b is pulled to the right, the right connecting arm 82c is pulled to the left. Thus, in conjunction with the operation of the operation member 81, the left and right connecting

arms

82b and 82c can be pushed out or drawn in simultaneously.

Each connecting

arm

82b, 82c is partially bent and extends, and a lock member 85 is attached to the tip thereof. The lock member 85 is a part that selectively engages with the wheel 4 to restrict the rotation of the wheel 4 with respect to the rotation axis Ar2. As can be understood from FIG. 12, each lock member 85 is configured by a rod-shaped member having an axial direction along a rotation axis Ar2 parallel to the left-right direction d2.

FIG. 14 shows the lock member 85 and the rear wheel 42 with the wheel locking device 80 disposed in the locked state S1. First, as an element constituting the rear wheel 42, a tire 42b is held on the outer periphery of the wheel portion 42a, and a brake plate 42c is fixed to a surface of the wheel portion 42a facing the lock member 85 side. A plurality of receiving holes 42d arranged around the rotation axis Ar2 of the rear wheel 42 are formed in the brake plate 42c.

The receiving hole 42d is for receiving the tip of the lock member 85 of the wheel lock device 80 when the wheel lock device 80 is in the locked state S1. The receiving hole 42d is formed along the rotation axis Ar2 of the rear wheel 42.

Thus, as shown in FIGS. 12 and 14, when the operation member 81 is switched to the lock position P1, the left and right lock members 85 are pushed outward in the left-right direction d2 via the connecting member 82, and the rear wheel 42 is received. It is received in the hole 42d. As a result, the rear wheel 42 is restricted from rotating about the rotation axis Ar2, and as a result, the wheel lock device 80 can take the locked state S1. On the other hand, as shown in FIG. 11, when the operation member 81 is switched to the release position P2, the left and right lock members 85 are pulled inward in the left-right direction d2 via the connecting member 82 and out of the receiving hole 42d of the rear wheel 42 Get out. Thereby, the state in which the rotation of the rear wheel 42 is restricted is released, and as a result, the wheel lock device 80 can take the release state S2.

The connecting

arms

82b and 82c are urged by a spring (not shown) so as to push the lock member 85 outward in the left-right direction d2. Therefore, when the operation member 81 is switched to the lock position P1, when the lock member 85 is displaced from the receiving hole 42d of the rear wheel 42, the lock member 85 is pressed against the brake plate 42c, and the receiving hole It will be in the state which waits for acceptance to 42d.

By the way, when the wheel 4 is to be driven by the drive source 5 in a state where the rotation of the wheel 4 is restricted by the wheel lock device 80 (locked state), the wheel 4 is locked and not driven. As a result, the drive source 5 is overloaded. Therefore, in the present embodiment, as shown in FIG. 13, a lock sensor that monitors the state of the wheel locking device 80 so that the driving force from the driving source 5 is not transmitted to the wheel 4 while the wheel 4 is locked. 90 is provided.

As shown in FIG. 13, the lock sensor 90 is fixed to the mount frame 11d via other components. As an element constituting the lock sensor 90, a sensor body 92 provided with a sensing button 91 is disposed, and a detection piece 93 for pushing the sensing button 91 is supported by the sensor body 92 in a cantilever manner. That is, one end of the detection piece 93 is fixed to the sensor main body 92 and the other end is a free end.

When the operating member 81 swings between the lock position P1 and the release position P2, the right connecting arm 82c moves in conjunction with the movement. When the detection piece 93 is pushed out in accordance with the movement of the right connecting arm 82c, the detection piece 93 pushes in the sensing button 91. Thereby, the lock sensor 90 can detect the position of the operation member 81.

However, the lock sensor 90 is not particularly limited as long as the position of the operation member 81 can be detected. As another example, a type that detects the movement of the magnetic body pushed out to the connecting arm 82c as a change in magnetic field, or a type that detects the movement of the movable body pushed out to the connecting arm 82c as a change in brightness. Is mentioned.

Information detected by the lock sensor 90 is sent to the control device 7. The control device 7 controls the timing for driving the drive source 5 based on the information detected by the lock sensor 90. The control device 7 of the present embodiment performs control so that the driving force is not transmitted from the driving source 5 to the wheels 4 while the lock sensor 90 detects that the operation member 81 is positioned at the lock position P1.

Next, the operation of the present embodiment configured as described above will be described.

In particular, as can be understood from FIG. 2, the four strain gauges 61 constituting the detection element 6 are located above the grip 21 in the up-down direction d3, and the grip 21 is located behind and below the connection point c1. It is located at the position. According to such an arrangement, the strain gauge 61 acts as shown in FIGS. 15 to 18 below. 15 to 18 are views for explaining the operation of the strain gauge 61 when the handle 20 is operated. In the following description, when the inner square bar 22d is partitioned into two parts by a plane parallel to the longitudinal direction, the upper part is the upper area A1, and the lower part is the lower area A2. (See FIG. 8).

As shown in FIG. 15, when the operator holds the grip 21 and pushes the baby carriage 1 forward in the front-rear direction d1, the upper area A1 of the inner square bar 22d extends and the lower area A2 contracts. Information obtained by extending the upper region A1 and contracting the lower region A2 is measured by the four strain gauges 61. Information measured by the strain gauge 61 is sent to the control device 7. The control device 7 that has received the information recognizes that the grip 21 has been pushed forward or pushed downward, and a strain gauge is connected to a circuit in which the

DC motors

51b and 52b of the two

drive elements

51 and 52 are connected in series. The current corresponding to the value measured by 61 is provided. As a result, the

DC motors

51b and 52b rotate, and the

drive shafts

51a and 52a connected to the

DC motors

51b and 52b rotate the rear wheel 42 in the forward direction. In this way, the

drive shafts

51a and 52a assist the rotation of the rear wheel 42, thereby reducing the burden of the operator pushing the baby carriage 1 forward.

When there is a step on the running surface, the operator pushes the grip 21 downward in the up-down direction d3 and tries to float the front wheel 41. As shown in FIG. 16, when the operator pushes down the baby carriage 1, the upper area A1 of the inner square member 22d extends and the lower area A2 contracts, as in FIG. Information that the upper area A1 extends and the lower area A2 shrinks is measured by the four strain gauges 61 and sent to the control device 7. The control device 7 that has received the information recognizes that the grip 21 has been pushed forward or pushed downward, and the value measured by the strain gauge 61 is set to a circuit in which two

DC motors

51b and 52b are connected in series. Provide a corresponding current. As a result, the

DC motors

51b and 52b rotate, and the

drive shafts

51a and 52a connected to the

DC motors

51b and 52b rotate the rear wheel 42 in the forward direction. That is, when the grip 21 is pushed down, the rear wheel 42 is rotated in the forward direction as in the case where the grip 21 is pushed forward. As a result, even during the operation over the step, it is possible to receive the assistance of the driving force from the driving source 5 and to push the baby carriage 1 without excessive burden.

On the other hand, when pushing the baby carriage 1 downhill, as shown in FIG. 17, the operator holds the grip 21 and pulls the baby carriage 1 backward in the front-rear direction d1. In this case, contrary to the case of FIGS. 15 and 16, the upper area A1 of the inner square member 22d shrinks and the lower area A2 extends. Information that the upper region A1 is contracted and the lower region A2 is extended is measured by the four strain gauges 61 and sent to the control device 7. The control device 7 that has received the information recognizes that the grip 21 has been pulled backward, and displays a current corresponding to the value measured by the strain gauge 61 in a circuit in which the two

DC motors

51b and 52b are connected in series. 15 and 16 are provided in the opposite direction. Accordingly, the

DC motors

51b and 52b rotate, and the

drive shafts

51a and 52a connected to the

DC motors

51b and 52b rotate the rear wheel 42 in the backward direction. In this way, the

drive shafts

51a and 52a assist the rotation of the rear wheel 42, thereby reducing the burden of the operator pulling the baby carriage 1 backward.

Next, when the baby carriage 1 is turned, as shown in FIG. 18, the baby carriage 1 can be turned by making a difference in the force to push the two

grip portions

21a and 21b forward. In the example shown in FIG. 18, the baby carriage 1 can be turned counterclockwise by increasing the force applied to the right grip portion 21b rather than the left grip portion 21a. Even if different forces are applied to the two

grip portions

21a and 21b, the upper region A1 of the inner square member 22d extends and the lower region A2 contracts, as in the case of FIG. Information that the upper area A1 extends and the lower area A2 shrinks is measured by the four strain gauges 61 and sent to the control device 7. The control device 7 that has received the information recognizes that the grip 21 has been pushed forward or pushed downward, and the value measured by the strain gauge 61 is set to a circuit in which two

DC motors

51b and 52b are connected in series. Provide a corresponding current. In the series circuit shown in FIG. 6, when the two

DC motors

51 b and 52 b are configured identically, the magnitudes of the currents flowing through the two

DC motors

51 b and 52 b are equal, so the two

DC motors

51 b and 52 b are connected to the wheel 4. The driving force provided is also considered to be equal.

However, when the baby carriage 1 is turned counterclockwise, the left wheel 4 serving as the inner ring is subjected to greater resistance from the ground contact surface than the right wheel 4 serving as the outer ring, and the direct current connected to the left wheel 4 serving as the inner ring is applied. It becomes difficult for the motor 51b to rotate. When the rotational speed of the DC motor 51b connected to the left wheel 4 serving as the inner ring decreases, the counter electromotive force generated in the DC motor 51b decreases, and a large amount of current easily flows through the series circuit. As a result, the current flowing through the DC motor 52b connected to the right wheel 4 serving as the outer ring is relatively increased, and a large driving force can be provided to the right wheel 4 serving as the outer ring. Thereby, it becomes easy to rotate the wheel 4 on the right side as an outer wheel, and as a result, the turning operation can be performed smoothly.

When the traveling operation of the baby carriage 1 is completed, the baby carriage 1 is stopped and the operation member 81 is switched from the release position P2 shown in FIG. 11 to the lock position P1 shown in FIG. In conjunction with this, the state in which the lock member 85 restricts the rotation of the rear wheel 42 is released, and as a result, the wheel lock device 80 is switched from the release state S2 to the lock state S1. Information that the operation member 81 has been switched to the lock position P 1 is detected by the lock sensor 90 and sent to the control device 7. The control device 7 that has received the information controls so that the driving force is not transmitted from the driving source 5 to the wheels 4 while the lock sensor 90 detects that the operation member 81 is positioned at the lock position P1. In other words, while the wheel lock device 80 is in the locked state S 1, control is performed so that the drive force is not transmitted from the drive source 5 to the wheel 4. Thereby, even if a load is applied to the handle 20 unintentionally by the operator, it is possible to prevent the drive source 5 from operating to drive the wheels 4.

As described above, the baby carriage 1 according to the present embodiment includes the baby carriage main body 2, the plurality of wheels 4 that are supported by the baby carriage main body 2 and rotate (rotate) around the respective rotation axes Ar1 and Ar2, and the baby carriage main body 2. A driving source 5 that is supported and provides driving force to at least one of the plurality of wheels 4, a detection element 6 that detects information related to a traveling operation input to the baby carriage body 2, and information detected by the detection element 6 And the control device 7 for controlling the driving power source 5 to adjust the driving force from the driving power source 5 to the wheels 4, and at least one of the plurality of wheels 4 rotates around the rotation axis Ar2. A wheel lock device 80 provided in the baby carriage main body 2 so as to be switchable between a lock state S1 for restricting the state and a release state S2 for releasing the state for restricting the rotation of the wheel 4, Wheel lock While the location 80 is in the locked state S1, the driving force from the drive source 5 is prevented transmitted to the wheels 4. According to such a form, it can prevent that the drive source 5 tries to drive the wheel 4 in the state which controlled rotation of the wheel 4, and it can suppress that an excessive load is applied to the drive source 5. Can do. Further, since the driving force applied to the wheels 4 by the driving source 5 can be adjusted in accordance with the traveling operation of the baby carriage 1, the baby carriage 1 can be operated as intended.

Further, according to the present embodiment, of the plurality of wheels 4, the wheel provided with the driving force from the drive source 5 is the rear wheel 42, and the front wheel 41 of the plurality of wheels 4 is connected via the caster 3. The baby carriage main body 2 is supported. Since the front wheel 41 is supported by the baby carriage main body 2 via the casters 3, the baby carriage 1 can be smoothly turned. Further, considering that the handle 20 operated by the operator is located rearward and the center of gravity of the infant riding on the baby carriage 1, it can be said that the rear wheel 42 is easily loaded and stably grounded on the ground surface. By providing the driving force from the driving source 5 to the rear wheel 42 that is stably grounded, driving assistance by the driving source 5 can be stably realized.

Further, according to the present embodiment, the drive source 5 includes the first drive element 51 that provides a driving force to at least one of the plurality of wheels 4 and the first drive element 51 of the plurality of wheels 4. The second drive element 52 is provided separately from the first drive element 51 and provides the drive power to the wheels 4 different from the wheels 4 to which the drive power is provided. According to such a form, providing different driving force to the different wheels 4 contributes to realizing appropriate distribution of the driving force according to the traveling state of the baby carriage 1.

Further, according to the present embodiment, the wheel 4 provided with the driving force from the first driving element 51 and the wheel 4 provided with the driving force from the second driving element 52 have different positions in the left-right direction d2. The first drive element 51 and the second drive element 52 each include a DC motor, and the DC motor 51b of the first drive element 51 and the DC motor 52b of the second drive element 52 are in series with the power source 75. It is connected to the. When the baby carriage 1 is turned, a greater resistance from the ground contact surface is applied to the wheel 4 serving as the inner ring than to the wheel 4 serving as the outer ring. For this reason, when the

DC motors

51b and 52b of the two

drive elements

51 and 52 are connected in series, the DC motor 51b connected to the wheel 4 serving as the inner ring is difficult to rotate. When the rotational speed of the DC motor 51b connected to the wheel 4 serving as the inner ring decreases, the counter electromotive force generated in the DC motor 51b decreases, and a larger amount of current easily flows through the series circuit. As a result, the current flowing through the DC motor 52b connected to the wheel 4 serving as the outer ring is relatively increased, and a large driving force can be provided to the wheel 4 serving as the outer ring. From the above, when the

DC motors

51b and 52b of the two

drive elements

51 and 52 are connected in series, the wheel 4 serving as the outer wheel can be easily rotated during the turning operation, and the turning operation can be performed smoothly.

Further, according to the present embodiment, the baby carriage body 2 includes the frame body 10 that supports the plurality of wheels 4 and the handle 20 that is connected to the frame body 10, and the detection element 6 is attached to the handle 20. Information about a load applied to the handle 20 is detected. Providing driving force from the driving source 5 to the wheels 4 according to the intention regarding the traveling operation of the operator by selecting information regarding the load applied to the handle 20 as the information regarding the traveling operation input to the baby carriage body 2. Is possible.

In addition, according to the present embodiment, the handle 20 includes the grip 21 on which the operator's hand is hung, and the handle body 22 that couples the grip 21 and the baby carriage body 2. When the information that the grip 21 is pushed forward or the information that the grip 21 is pushed down is detected by the element 6, the driving force is supplied to the drive source 5 to advance the wheel 4, and the grip 21 is moved backward by the detection element 6. When the pulled information is detected, the driving source 5 is provided with a driving force for moving the wheels 4 backward. According to such a form, the driving force to the wheel 4 by the drive source 5 can be adjusted according to the operation of the grip 21 by the operator. In particular, according to the present embodiment, the drive source 5 drives the wheels 4 to move forward even when the grip 21 is pushed down to lift the front wheels 41 in order to get over the step on the ground contact surface. . For this reason, even during the operation over the step, the baby carriage 1 can be pushed without excessive burden while receiving the assistance of the driving force from the driving source 5.

Further, according to the present embodiment, the detection element 6 includes a plurality of strain gauges 61 attached to the handle main body 22 of the handle 20, and at least one strain gauge 61 is pushed forward or below the grip 21. When the grip 21 is pulled backward, the grip 21 is retracted, or when the grip 21 is pushed forward or pushed downward, the contracted grip 21 is stretched backward. According to such a form, since the detection element 6 is implement | achieved by the strain gauge 61, the information which an operator operates the grip 21 can be detected stably, avoiding a complicated structure. From the viewpoint of more stably detecting information on the operation of the grip 21 by the operator, the grip 21 is located at a position behind and below the connecting portion c1 between the handle body 22 and the frame body 10 or a position located above and above. Good location.

In particular, according to the present embodiment, the grip 21 is located at a position behind and below the connection location c1, and the strain gauge 61 is connected to a connection location of the handle body 22 with the operation member 21. It is attached to a portion between the location c1. In this case, in conjunction with the load applied to the grip 21 by the operator, the portion of the handle body 22 to which the strain gauge 61 is attached extends and contracts with high sensitivity. For this reason, the strain gauge 61 can more accurately detect information on the operation of the grip 21 by the operator.

In addition, according to the present embodiment, the wheel lock device 80 is connected to the operation member 81 and moves in conjunction with the operation member 81 that is movable between the lock position P1 and the release position P2. A lock member 85, and the lock member 85 engages with the wheel 4 while the operation member 81 is positioned at the lock position P1, and restricts the wheel 4 from rotating around the rotation axis Ar2. While the operation member 81 is located at the release position P2, the state where the operation member 81 is separated from the wheel 4 and the rotation of the wheel 4 is restricted is released. According to such a form, only by switching the operation member 81 between the lock position P1 and the release position P2, the lock state S1 in which the wheel lock device 80 restricts the rotation of the wheel 4 and the rotation of the wheel 4 are restricted. It is possible to easily switch between the release state S2 in which the released state is released. That is, the wheel lock device 80 is excellent in that it can be easily switched between the locked state S1 and the released state S2.

In addition, according to the present embodiment, the lock sensor 90 that detects the state of the wheel lock device 80 is further provided, and the control device 7 is detected by the lock sensor 90 that the wheel lock device 80 is in the lock state S1. While driving, control is performed so that the driving force from the driving source 5 is not transmitted to the wheels 4. In other words, the wheel lock device 80 further includes a lock sensor 90 that detects the position of the operation member 81, and the control device 7 detects that the operation member 81 is positioned at the lock position P 1 by the lock sensor 90. While driving, control is performed so that the driving force from the driving source 5 is not transmitted to the wheels 4. According to such a form, by detecting the state of the wheel locking device 80 by the lock sensor 90, control is performed so that the driving force from the driving source 5 is not transmitted to the wheel 4 in a state where the rotation of the wheel 4 is restricted. be able to. For this reason, the baby carriage 1 that can prevent the drive source 5 from trying to drive the wheels 4 in a state where the rotation of the wheels 4 is restricted can be more reliably realized.

Further, according to the present embodiment, the wheel locking device 80 restricts the rotation of the wheel 4 that can be provided with the driving force from at least the driving source 5 around the rotation axis Ar2 in the locked state S1. In this case, the wheel 4 locked by the wheel lock device 80 is the same as the wheel 4 to which the driving force from the driving source 5 is provided, so that the driving source 5 drives the wheel 4 while the wheel 4 is locked. Then, an excessive load is applied to the drive source 5. Therefore, in such a baby carriage 1, it is more effective to prevent the drive source 5 from driving the wheels 4 in a state where the rotation of the wheels 4 is restricted.

Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described.

For example, in the above-described embodiment, the example in which the two

seat units

8a and 8b are provided side by side is shown, but the number of the

seat units

8a and 8b is not limited to such an example. For example, a single seat unit may be provided, or two or more seat units may be provided, and the two or more seat units may be arranged in front and back.

In the above-described embodiment, the example in which the

DC motors

51b and 52b of the two

drive elements

51 and 52 are connected in series to the power source 75 is shown. However, the circuit design related to the

DC motors

51b and 52b is described above. The example is not limited. The

DC motors

51 b and 52 b of the two

drive elements

51 and 52 may be connected to the power supply 75 in parallel.

In the above-described embodiment, the example in which the detection element 6 includes the strain gauge 61 is shown, but the form of the detection element 6 is not limited to the above-described example. The detection element 6 is arbitrary as long as it can detect information related to the traveling operation input to the baby carriage body 2. As another example, the detection element 6 is configured as a torque sensor, a pressure sensor, a magnetostriction sensor, or the like attached to the handle body 22. May be. For example, the pressure sensor is of a type that captures a load applied to the handle 20 as a change in the pressure of the working fluid, measures the change in pressure with a pressure-sensitive element via a diaphragm, and then outputs the change as an electric signal. May be.

In the above-described embodiment, the example in which the column 22a formed of a single column connects the rear upper frame 12d and the grip 21 has been described. However, the form of the column 22a is not limited to the above-described example. The column 22a may be composed of a plurality of columns, and the rear upper frame 12d and the grip 21 may be connected.

Further, in the above-described embodiment, as shown in FIG. 5, the example in which the two

drive elements

51 and 52 drive the left and right rear wheels 42 has been shown. However, the form in which the wheels 4 are driven is the example described above. It is not limited to. FIG. 19 shows another example of driving the wheel 4. In the example shown in FIG. 19, three rear wheels 42 are supported by the base frame 11, and the drive source 5 is connected to the central rear wheel 42 between the left and right rear wheels 42.

FIG. 20 shows the configuration of the wheel lock device 80. As shown in FIG. 20, an operation member 81 constituting the wheel lock device 80 is supported by the base frame 11 in the vicinity of the central rear wheel 42. The operation member 81 shown in FIG. 20 is configured as a pedal operated by a foot, and is between a release position P2 shown in FIG. 20 and a lock position P1 (see FIG. 22) depressed below the release position P2. Can swing.

The operation member 81 includes a lock member 85 that restricts rotation of the central rear wheel 42, another lock member 85 that restricts rotation of the left rear wheel 42, and another member that restricts rotation of the right rear wheel 42. The lock member 85 is connected.

The lock member 85 that restricts the rotation of the central rear wheel 42 is formed integrally with the operation member 81 and moves together with the operation member 81. The central locking member 85 includes a locking projection 85a, and the locking projection 85a is received in a locking groove 42e (see FIG. 21) of the brake plate 42c included in the central rear wheel 42. .

The lock member 85 that restricts the rotation of the left and right rear wheels 42 is connected to the operation member 81 via a connecting member 82. The connecting member 82 is configured as flexible left and

right wire members

82 d and 82 e, and pulls or pushes the left and right lock members 85 in conjunction with the movement of the operation member 81.

FIG. 21 shows an enlarged view of the lock member 85 on the left side. Although illustration is omitted, the right lock member 85 is configured in substantially the same manner as the left lock member 85 shown in FIG. As shown in FIG. 21, the left lock member 85 is supported by the base frame 11 so as to be slidable in the vertical direction d3. The lock member 85 is connected to the end of the wire member 82d so as to be movable in conjunction with the movement of the operation member 81.

The locking member 85 is provided with a locking pin 85b having a longitudinal axis along the rotation axis Ar2 of the rear wheel 42. The locking pin 85b is received in a receiving hole 42d (see FIG. 14) formed in the brake plate 42c of the left rear wheel 42.

Further, a lock sensor 90 is supported on the base frame 11 so as to detect the sliding movement of the lock member 85. As an element constituting the lock sensor 90, a sensor body 92 provided with a sensing button 91 is disposed, and a detection piece 93 for pushing the sensing button 91 is supported by the sensor body 92 in a cantilever manner.

FIG. 22 shows a state in which the rear wheel 42 is locked by the lock member 85 on the left side. As shown in FIG. 22, when the operation member 81 is switched to the lock position P 1, the three lock members 85 swing in conjunction with the operation member 81, and the locking protrusions 85 a or the locking pins of the lock members 85. 85b is received in the corresponding engaging groove 42e or receiving hole 42d of the rear wheel 42. In this way, the wheel lock device 80 is switched to the locked state S1. The information that the wheel lock device 80 is switched to the locked state S1 is detected by the lock sensor 90 and sent to the control device 7.

On the other hand, when the operating member 81 is switched to the release position P2 shown in FIGS. 20 and 21, the three locking members 85 swing in conjunction with the operating member 81, and the locking protrusion 85a or the locking pin 85b is moved backward. It slips out of the locking groove 42e of the ring 42 or out of the receiving hole 42d. In this way, the wheel lock device 80 is switched to the release state S2. The information that the wheel lock device 80 is switched to the release state S2 is detected by the lock sensor 90 and sent to the control device 7.

19 to 22 also, the wheel lock device 80 is connected to the operation member 81 that is movable between the lock position P1 and the release position P2, and is linked to the operation member 81. A lock member 85 that moves, and the lock member 85 engages with the wheel 4 while the operation member 81 is in the lock position P1, and restricts the wheel 4 from rotating about the rotation axis Ar2. While the operation member 81 is located at the release position P2, the state where the operation member 81 is separated from the wheel 4 and the rotation of the wheel 4 is restricted is released. According to such a form, only by switching the operation member 81 between the lock position P1 and the release position P2, the lock state S1 in which the wheel lock device 80 restricts the rotation of the wheel 4 and the rotation of the wheel 4 are restricted. It is possible to easily switch between the release state S2 in which the released state is released. That is, the wheel lock device 80 is excellent in that it can be easily switched between the locked state S1 and the released state S2.

In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

Claims

The baby carriage body,
A plurality of wheels that are supported by the baby carriage body and rotate about each rotation axis;
A driving source supported by the baby carriage body and providing a driving force to at least one of the plurality of wheels;
A detection element for detecting information related to a driving operation input to the baby carriage body;
A control device that controls the drive source based on information detected by the detection element and adjusts the driving force from the drive source to the wheel;
It is possible to switch between a locked state that restricts rotation of at least one of the plurality of wheels around its own rotation axis and a release state that releases the state of restricting rotation of the wheel. A wheel locking device provided in the baby carriage body to be,
With
A baby carriage in which the driving force from the driving source is not transmitted to the wheels while the wheel locking device is in the locked state.
A lock sensor for detecting a state of the wheel lock device;
2. The control device according to claim 1, wherein the control device controls the driving force from the driving source not to be transmitted to the wheels while the lock sensor detects that the wheel locking device is in the locked state. Baby carriage.
The wheel lock device includes an operation member that can move between a lock position and a release position, and a lock member that is connected to the operation member and moves in conjunction with the operation member.
The lock member engages with the wheel while the operation member is located at the lock position and restricts the wheel from rotating about its own rotation axis, and the operation member is located at the release position. The baby carriage according to claim 2, wherein the baby carriage is released from a state where the rotation of the wheel is restricted while being separated from the wheel.
A lock sensor for detecting the position of the operation member;
The said control apparatus is controlled so that the driving force from the said drive source is not transmitted to the said wheel, while detecting that the said operation member is located in the said lock position by the said lock sensor. Baby carriage.
5. The wheel lock device according to claim 1, wherein in the locked state, at least a wheel provided with a driving force from the driving source is restricted from rotating about its own rotation axis. 6. Baby carriage.
Among the plurality of wheels, a wheel provided with driving force from the driving source is a rear wheel,
The baby carriage according to any one of claims 1 to 5, wherein a front wheel of the plurality of wheels is supported by the baby carriage body via a caster.
The baby carriage body has a frame body that supports the plurality of wheels, and a handle connected to the frame body,
The baby carriage according to any one of claims 1 to 6, wherein the detection element is provided on the handle and detects information related to a load applied to the handle.