JP6542376B2 - Lock joint and pram for hand carts - Google Patents

Description

  The present invention relates to a lockable joint for a handcart that rotatably couples two frame members that constitute the handcart. The present invention also relates to a stroller having this locking function joint.

  Most widespread prams are configured to be foldable. For example, in the baby carriage disclosed in JPH06-144238A, an upper frame supporting a seat is connected to a base frame supporting a plurality of wheels. The upper frame is obtained by connecting two frame members so as to be relatively rotatable via a locking joint. The baby carriage can be folded by unlocking the joint and rotating the two frame members relative to each other. The folded baby carriage can be compact in its overall size and is suitable for carrying.

  In the baby carriage disclosed in JPH06-144238A, the two frame members are unlocked by loosening a screw provided in the locking joint. For this reason, in the baby carriage disclosed in JPH 06-144238A, the operation of releasing the lock of the two frame members is complicated.

  The present invention has been made in consideration of such points, and it is an object of the present invention to provide a lockable joint for a handcart easy to operate to unlock two frame members. Another object of the present invention is to provide a baby carriage having the locking function joint.

  In the baby carriage disclosed in JPH06-144238A, when the two frame members constituting the upper frame are relatively rotated through the joints, a gap opened upward is generated between the two frame members. If a gap opened upward between the two frame members is generated, there is a high possibility that clothes or the like may be caught. For this reason, it is more convenient if it is possible to prevent the occurrence of a gap opening upward between the two frame members.

The present invention is directed to a handcart for connecting two frame members so as to be switchable between a state permitting relative rotation of the two frame members and a state restricting relative rotation of the two frame members. A lockable joint,
A joint body attached to one frame member;
A holder attached to another frame member and forming a receiving space with the joint body;
A fulcrum pin passing through both the joint body and the holder such that the joint body and the holder can be relatively rotated;
A first lock member and a second lock member pivotally supported by the joint body in the housing space;
The holder is movable in such a manner that the holder can move between a first position and a second position according to relative rotation between the joint body and the holder within an elongated hole formed in the joint body. Have a lock pin inserted in the
The first lock member is engaged with the lock pin at the first position to prevent the lock pin from moving to the second position, the lock pin at the first position, and the lock position. Swingable between a release position allowing movement between the second position and
The second lock member is engaged with the lock pin at the second position to prevent the lock pin from moving to the first position, the lock pin at the first position, and the lock position. Swingable between a release position allowing movement between the second position and
An operation member is connected to the first lock member, and when the first lock member is moved from the lock position to the release position by the operation member, the second lock member is also interlocked with the lock position from the lock position. Move to the release position.

  In the joint with lock function for a handcart according to the present invention, when the first lock member is moved from the lock position to the release position by the operation member, the first lock member presses the second lock member. The second lock member may be pushed up from the lock position to the release position.

  In the joint with lock function for a handcart according to the present invention, the first lock member may push up the second lock member from the lock position to the release position through a cushion material.

  In the joint with lock function for a handcart according to the present invention, the operation member connects a sliding body slidably attached to the one frame member, the sliding body and the first locking member, And an elongated member configured to swing the first lock member in conjunction with the sliding operation of the sliding body.

  In the joint with lock function for a handcart according to the present invention, the joint further includes a first biasing member accommodated between the joint body and the holder and bridged between the joint body and the first lock member. The first biasing member may bias the first locking member toward the locking position.

  A stroller according to the present invention is extended between a base frame supporting a plurality of wheels, an upper frame supporting a seat unit, the base frame and the upper frame, and the upper frame has any of the features described above. And a link member connected via a lockable joint for a handcart, and the upper frame is rotated relative to the link member via the lockable joint. The base frame is foldable.

  A stroller according to the present invention is supported by the stroller body, and includes a drive source for providing a driving force to at least one of the plurality of wheels, and a detection element for detecting information related to a traveling operation input to the stroller body. The control device may further control the drive source based on the information detected by the detection element to adjust a drive force from the drive source to the wheel.

  According to the present invention, both the first lock member and the second lock member can be moved from the lock position to the release position simply by operating the operation member. Therefore, regardless of whether the lock pin is in the first position or the second position, the restraint by the first lock member or the second lock member can be easily released, and as a result, the two frame members can be easily locked. It is possible to release it.

The figure which shows the baby carriage by one embodiment from a front in an expanded state. The figure which shows the baby carriage in the unfolded state shown in FIG. 1 from the side in the state which removed the seat unit. The disassembled perspective view which shows schematically the joint with a locking function integrated in the stroller main body shown in FIG. The side view which shows the joint with a lock function shown in FIG. 3 in the state which removed the holder. The side view which shows the holder of the joint with a locking function shown in FIG. FIG. 5 is a side view showing a state in which two lock members are swung from the state shown in FIG. 4A to the release position. The side view which shows a motion of the joint with a lock function when a baby carriage is folded from the state shown in FIG. The side view which shows the joint with a locking function in the state which folded the baby carriage. The figure shown from the side in the state where the baby carriage shown in FIG. 2 was folded. The block diagram which shows typically the structure of the stroller shown in FIG. The perspective view which shows the drive element of the stroller shown in FIG. 1, and a periphery of a wheel from back. The circuit diagram which shows the connection relation of the direct current motor which comprises a drive element. The top view which expands and shows the handle of the stroller shown in FIG. The figure for demonstrating the structure of the detection element provided in the handle of the stroller shown in FIG. FIG. 14 is a circuit diagram of the sensing element shown in FIG. The graph which shows the example which adjusts the driving force by a drive element based on the information from a detection element. The figure for demonstrating an effect | action of a detection element when pushing forward the handle | steering-wheel of the stroller shown in FIG. The figure for demonstrating the effect | action of a detection element when pushing down the handle of the stroller shown in FIG. 1 downward. The figure for demonstrating the effect | action of a detection element when the handle of the stroller shown in FIG. 1 is pulled back. The perspective view for demonstrating the state when making the baby carriage shown in FIG. 1 turn.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1-19 is a figure for demonstrating the baby carriage 1 by one Embodiment. Among these, FIG. 1 is a view showing the baby carriage 1 according to the embodiment from the front direction. In the baby carriage 1 shown in FIG. 1, the first seat unit 8 a and the second seat unit 8 b are supported by the baby carriage main body 2. The first seat unit 8a and the second seat unit 8b are places on which the baby is seated, and are arranged side by side. Hoods 9a and 9b are provided on the respective seat units 8a and 8b so as to protect infants seated on the seat units 8a and 8b from sunlight and wind.

  In the present specification, the terms “front”, “rear”, “upper”, “lower”, “front and rear direction”, “vertical direction” and “left and right direction” with respect to the baby carriage 1 and its components are particularly used. When there is no instruction, the baby carriage 1 in the unfolded state is "front", "back", "upper", "lower", "back and forth", "up and down" based on the operator who operates the grip 20 while holding the handle 20. It means "direction" and "left and right direction". More specifically, the “front-rear direction d1” corresponds to the front and back direction of the sheet of FIG. And, unless otherwise instructed, “front” is the side to which the operator pushing the steering wheel is directed, and the front side of the paper in FIG. 1 is the front. On the other hand, the "vertical direction d3" is a direction perpendicular to the front-rear direction and orthogonal to the ground plane. Therefore, when the ground contact surface is a horizontal surface, "vertical direction d3" refers to the vertical direction. The “left-right direction d2” is also a 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 stroller main body 2 shown in FIG. 2 is configured of 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 supporting 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. The front portion of the upper frame 12 and the front portion of the base frame 11 are connected via the front link member 13, and the middle portion of the upper frame 12 and the rear portion of the base frame 11 are connected via the intermediate link member 14 There is. The front link member 13 and the intermediate link member 14 function as links, and allow the upper frame 12 to pivot relative to the base frame 11.

  In particular, the base frame 11 is provided with left and right side base frames 11a and 11b 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 forming 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 parts.

  A front wheel 41 and a rear wheel 42 are attached to the side base frames 11a and 11b. In the present embodiment, each front wheel 41 is rotatably and rotatably supported by the side base frames 11 a and 11 b via the caster 3. The caster 3 rotatably supports the front wheel 41 about the rotation axis Ar1 and is pivotable about a pivot axis As1 which is not parallel to the rotation axis Ar1 and which is parallel to the orthogonal direction in the present embodiment. That is, the front wheel 41 is supported by the caster 3 so as to be rotatable and changeable in its direction.

  On the other hand, each rear wheel 42 located behind the front wheel 41 is not rotatably supported by the caster. In the present embodiment, each rear wheel 42 is rotatably supported by a drive shaft 51a (see FIG. 10) of the drive source 5 described later, and is not pivotable.

  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 middle frame 12c, and the second seat unit 8b is arranged between the right side upper frame 12b and the middle frame 12c. It is done.

  Rear ends of the left and right side upper frames 12a and 12b and the middle 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 portion operated by the hand of the operator. The handle 20 will be described later with reference to FIGS. 12 to 19.

  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 forming 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 parts.

  The front ends of the left and right side upper frames 12a and 12b are connected by the lateral connection bar 12e and the upper side link frame 13a. Among them, the horizontal connection bar 12e is formed in a straight line along the left-right direction d2, and the front end of the intermediate frame 12c is connected to the middle portion of the horizontal connection bar 12e. The upper side link frame 13a functions as a link, and has a curved shape projecting in a region forward of the lateral connection bar 12e.

  In particular, the upper link frame 13a is rotatably connected to the left and right upper frames 12a and 12b via the locking function joint 100. On the other hand, the transverse connection bar 12 e is bridged between the left and right locking function joints 100. The locking function joint 100 will be described later with reference to FIGS. 4A to 7.

  The base side link frame 13 b is bridged between the front portion of the upper side link frame 13 a and the front ends of the left and right side base frames 11 a and 11 b. The base-side link frame 13b is fixed to the upper-side link frame 13a at its front end, and its left and right rear ends are pivotally connected to the left and right side base frames 11a and 11b via the horizontal connection link bar 13c. There is. The lateral connection link bar 13c is formed linearly along the left-right direction d2, and is rotatably connected to the front ends of the left and right side base frames 11a and 11b. The front link member 13 functioning as a link is configured by the upper side link frame 13a, the base side link frame 13b, and the lateral connection link bar 13c.

  The left and right intermediate link members 14 are bridged between the middle part of the left and right side upper frames 12a and 12b and the rear part 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.

  Next, with reference to FIGS. 3 to 7, the lock function-equipped joint 100 incorporated in the frame body 10 will be described. FIG. 3 is an exploded perspective view schematically showing the locking function joint 100. As shown in FIG. FIG. 4A is a view showing the lockable joint 100 with the holder 120 removed, and FIG. 4B is a view showing the holder 120 of the lockable joint 100.

  The lock function joint 100 shown in FIG. 3 is a joint that connects the upper frame 12 and the front link member 13 so as to be relatively rotatable around the rotation axis R1. The joint 100 regulates the relative rotation of the two frames 12 and 13 in the unfolded state of the stroller 1 shown in FIGS. 1 and 2. That is, the joint 100 can lock the two frames 12 and 13 in a non-rotatable manner relative to each other in the unfolded state of the stroller 1. When the baby carriage 1 is folded from the unfolded state shown in FIGS. 1 and 2 to the folded state shown in FIG. 8, the joint 100 is switched to allow relative rotation of the two frames 12 and 13.

  As an element constituting the joint 100 shown in FIG. 3, a joint body 110 attached to the upper frame 12 is relatively rotatably incorporated in a holder 120 attached to the front link member 13. A fulcrum pin 130 extends along the rotation axis R1 through both the joint body 110 and the holder 120.

  The joint body 110 is constituted by the casing 111 and the cover body 118, and the accommodation space 101 is formed between the casing 111 and the cover body 118. The casing 111 and the cover body 118 are fixed to each other and attached to the upper frame 12.

  In particular, the casing 111 is provided with a cylindrical portion 112a having an axial direction along the rotation axis R1, and a bottom portion 112b is connected to one end side in the axial direction of the cylindrical portion 112a. An opening 113 is formed at the other end of the cylindrical portion 112 a in the axial direction. The front direction of the opening 113 coincides with the direction in which the rotation axis R1 extends. The accommodation space 101 can be accessed through the opening 113.

  The holder main body 121 and the back surface side main body 127 which constitute the holder 120 are arranged so as to sandwich the joint main body 110 on both sides of the joint main body 110. The holder body 121 is disposed to face the opening 113 of the joint body 110. On the other hand, the back side main body 127 faces the bottom portion 112 b of the casing 111. The holder body 121 and the back side body 127 are connected via an arm portion 129, and the arm portion 129 is attached to the upper side link frame 13a.

  In particular, through holes 114, 119, 124, 128 are respectively formed in the casing 111 and the cover body 118 of the joint body 110 and the holder body 121 and the back side body 127 of the holder 120, and the respective through holes 114, 119, 124, At 128, the fulcrum pin 130 along the rotation axis R1 is inserted. By inserting the fulcrum pin 130 into the joint body 110 and the through holes 114, 119, 124, 128 of the holder 120, the joint body 110 and the holder 120 can be rotated relative to each other about the rotation axis R1.

  Further, the lock pin 122 fixed to the holder main body 121 protrudes from the holder main body 121 side toward the bottom portion 112 b side of the joint main body 110. The lock pin 122 is a component used to restrict relative rotation between the joint body 110 and the holder 120. The lock pin 122 has an axial direction along the rotation axis R1 and is inserted into an elongated hole 115 formed in the bottom portion 112b of the casing 111.

  The lock pin 122 moves within the elongated hole 115 in response to relative rotation between the joint body 110 and the holder 120. In the present embodiment, the lock pin 122 is movable in the elongated hole 115 between the developed use position P1 shown by the solid line in FIG. 4A and the folded use position P2 shown by the one-dot chain line in FIG. 4A. ing.

  The elongated hole 115 is formed along a path along which the lock pin 122 moves with relative rotation between the joint body 110 and the holder 120 around the rotation axis R1. In the example shown to FIG. 4A, the long hole 115 has a shape along the circular arc centering on rotation axis R1.

  Now, as shown to FIG. 4A, in order to restrain the lock pin 122 in the expansion | deployment use position P1 or the folding use position P2, the 1st lock member 140 and the 2nd lock member 150 are provided, respectively. The two lock members 140 and 150 are pivotally supported by the joint body 110 in the accommodation space 101 of the joint body 110.

  As a specific configuration, each lock member 140, 150 has a base 141, 151 pivotally supported by the casing 111 of the joint body 110, a head portion 143, 153 engaged with the lock pin 122, and a base 141 , 151 and the head portions 143, 153, and the arm portions 142, 152.

  The pivot holes 141a and 151a are formed in the base portions 141 and 151 of the lock members 140 and 150, and the pivot pins 135 and 136 are inserted into the pivot holes 141a and 151a. Each pivot pin 135, 136 has an axial direction parallel to the rotation axis R1 and is fixed to the bottom 112b of the casing 111. By pivoting the base portions 141 and 151 of the lock members 140 and 150 with the pivot pins 135 and 136 as a starting point, the rocking operation of the lock members 140 and 150 becomes possible.

  The arm portions 142 and 152 extend from one end connected to the base portions 141 and 151 toward the other end connected to the head portions 143 and 153. The arm portions 142 and 152 have a function of adjusting the position at which the head portions 143 and 153 swing relative to the pivot pins 135 and 136.

  The head portions 143, 153 of the locking members 140, 150 are shaped to expand from the arm portions 142, 152. The head portions 143 and 153 of the lock members 140 and 150 engage with the lock pin 122 to restrain the lock pin 122. In particular, the head portion 143 of the first lock member 140 engages with the lock pin 122 in the deployed use position P1 at the lock position M1 shown in FIG. 4A, and the head portion 153 of the second lock member 150 In the lock position N1 shown in FIG. 4A, the lock pin 122 is engaged with the fold use position P2.

  As understood from FIG. 4A, the head portion 143, 153 of each lock member 140, 150 contacts the lock pin 122 at an engagement surface 143a, 153a having a shape along a part of the outer periphery of the lock pin 122. Do. The engagement surfaces 143a and 153a of the lock members 140 and 150 are disposed in areas of the head portions 143 and 153 separated from the other lock members 140 and 150.

  The swing operation of the two lock members 140 and 150 is performed using the operation member 160. That is, the operation member 160 is a member for performing an operation of swinging the two lock members 140 and 150. As shown in FIG. 4A, an auxiliary arm portion 144 extends from the base portion 141 of the first lock member 140 in a direction different from the arm portion 142, and the operation member 160 is connected to the auxiliary arm portion 144. There is.

  As an element constituting the operation member 160, one end of the elongated member 161 is connected to the auxiliary arm portion 144 of the first lock member 140, and the other end of the elongated member 161 is slidably attached to the upper frame 12. It is connected to the sliding body 162 (refer FIG. 2). The sliding body 162 is a component operated by the hand of the operator. The sliding body 162 has, for example, a cylindrical shape, and can slide along the side upper frames 12a and 12b.

  The elongated member 161 pulls the auxiliary arm portion 144 of the first lock member 140 in conjunction with the sliding operation of the sliding body 162. As a result, the first lock member 140 can be rocked in conjunction with the sliding operation of the sliding body 162. Examples of the elongated member 161 include metal rods and wires.

  FIG. 5 shows a state in which the lock members 140 and 150 are swung to the release positions M2 and N2 by operating the elongated member 161. When the elongated member 161 is operated to swing the first lock member 140 from the lock position M1 shown in FIG. 4A to the release position M2 shown in FIG. 5, the second lock member 150 is also interlocked to move from the lock position N1. Move to the release position N2. Specifically, the second lock member 150 is pushed up by the swinging first lock member 140 and swung from the lock position N1 shown in FIG. 4A to the release position N2 shown in FIG.

  In the present embodiment, the second lock member 150 is pushed up to the swinging first lock member 140 via the cushion material 170. By providing the cushion material 170, it is possible to avoid physical wear and damage due to the head portion 143 of the first lock member 140 and the head portion 153 of the second lock member 150 coming into contact with each other. The cushioning material 170 may be made of a material that is more elastic or cushioning than the first locking member 140 and the second locking member 150, and examples thereof include rubber and resin. However, the cushioning material 170 is provided as needed, and may not necessarily be provided.

  In particular, at the release positions M2 and N2 shown in FIG. 5, the head portions 143 and 153 of the lock members 140 and 150 swing to positions displaced from the long holes 115. Therefore, when the lock members 140 and 150 are positioned at the release positions M2 and N2 shown in FIG. 5, the lock pin 122 is deployed and used in the elongated hole 115 according to the relative rotation between the joint body 110 and the holder 120. It becomes possible to move between the position P1 and the folding use position P2. That is, each lock member 140, 150 allows the lock pin 122 to move between the deployment use position P1 and the folding use position P2 at the release positions M2, N2 shown in FIG.

  On the other hand, in the lock positions M1 and N1 shown in FIG. 4A, the head portions 143 and 153 of the lock members 140 and 150 partially overlap the long hole 115. For this reason, when each lock member 140, 150 is located at the lock position M1, N1 shown in FIG. 4A, the lock pin 122 can not freely move back and forth between the deployment use position P1 and the folding use position P2. In particular, in the lock position M1 shown in FIG. 4A, the first lock member 140 prevents the lock pin 122 located at the deployment use position P1 from moving toward the fold use position P2, and the second lock member 150 in FIG. 4A. In the illustrated lock position N1, the lock pin 122 located at the folding use position P2 is prevented from moving toward the deployment use position P1.

  Further, as shown in FIG. 4A, the first biasing member 180 and the second biasing member 185 are housed in the housing space 101 of the joint body 110. Each biasing member 180, 185 is bridged between the joint body 110 and the arm portions 142, 152 of the locking member 140. In particular, the first biasing member 180 biases the first locking member 140 towards the locking position M1, and the second biasing member 185 directs the second locking member 150 towards the locking position N1. It is supposed to turn. In the example shown in FIG. 4A, each biasing member 180, 185 is configured as an elastic member made of a spring, and presses the corresponding lock member 140, 150 toward the lock position N1.

  Next, an operation of folding the baby carriage 1 using the locking function joint 100 will be described.

  First, the operating member 160 is operated with respect to the stroller 1 in the unfolded state to swing the first lock member 140 from the lock position M1 shown in FIG. 4A to the release position M2 shown in FIG. In conjunction with this operation, the second lock member 150 is also pushed up by the first lock member 140 and swung from the lock position N1 shown in FIG. 4A to the release position N2 shown in FIG.

  When each lock member 140, 150 reaches the release position M2, N2, the lock pin 122 is allowed to move from the deployed use position P1 to the folded use position P2 in the elongated hole 115. In this state, the handle 20 is lowered downward using its own weight. By this operation, the upper link frame 13a, the base link frame 13b, and the intermediate link member 14 are pivoted in the counterclockwise direction in FIG. 2, and the upper frame 12 is folded so as to overlap the base frame 11.

  FIG. 6 shows a state in which the frame body 10 is further folded from the state shown in FIG. As shown in FIG. 6, the lock pin 122 of the holder 120 connected to the upper side link frame 13 a is in the elongated hole 115 as the upper side link frame 13 a rotates with respect to the side upper frame 12 a. From the unfolded use position P1 toward the folded use position P2. During movement of the lock pin 122, the operating member 160 is returned to its original position, and the two lock members 140, 150 are directed to the lock position M1, N1. In the process of returning to the release position M2, the first lock member 140 or the second lock member 150 is received by the lock pin 122 moving in the elongated hole 115. For this reason, even if the operation member 160 is returned to the original position, the two lock members 140 and 150 can not be swung to the lock positions M1 and N1.

  FIG. 7 shows the joint 100 in a state where the stroller 1 is folded, and FIG. 8 shows the stroller 1 shown in FIG. 2 from the side in a folded state. In a state where the baby carriage 1 is folded, the lock pin 122 of the holder 120 reaches the folding use position P2. At the same time, since the first lock member 140 is not supported by the lock pin 122, both the first lock member 140 and the second lock member 150 reach the lock position M1, N1. When the second lock member 150 reaches the lock position N1, it engages with the lock pin 122 located at the folding use position P2 to restrain the lock pin 122. Thereby, the relative rotation between the upper frame 12 and the front link member 13 can be restricted together with the relative rotation between the joint body 110 and the holder 120.

  As a result of the above-described folding operation, as shown in FIG. 8, the base frame 11 and the upper frame 12 are disposed close to and substantially parallel to each other in a side view of the stroller 1. On the other hand, in order to return the baby carriage 1 from the folded state shown in FIG. 8 to the unfolded state shown in FIG. 2, the reverse procedure to the above-described folding operation may be taken.

  As described above, according to the joint with lock function 100 according to the present embodiment, the state S1 of permitting relative rotation of the two frame members 12 and 13 and the state of restricting relative rotation of the two frame members 12 and 13 It is a joint 100 with a lock function for a handcart that connects two frame members 12 and 13 so as to be able to switch between S2 and 13, and is attached to one frame member 12 to form a housing space 101. A joint body 110, a holder 120 attached to another frame member 13, and a fulcrum pin 130 penetrating both the joint body 110 and the holder 120 so that the joint body 110 and the holder 120 can be relatively rotated. A first lock member 140 swingably supported by the joint body 110 in the housing space 101; The holder 120 is provided with a second lock member 150, and the holder 120 has a first position (deployment use position) P1 according to relative rotation between the joint body 110 and the holder 120 in an elongated hole 115 formed in the joint body 110. The lock pin 122 is inserted into the long hole 115 so as to be movable between the second position (fold use position) P2 and the first lock member 140 is positioned at the first position P1. Lock position M1 that engages with the lock pin 122 and prevents the lock pin 122 from moving to the second position P2, and allows the lock pin 122 to move between the first position P1 and the second position P2 And the second lock member 150 is engaged with the lock pin 122 when the second lock member 150 is positioned at the second position P2 so that the lock pin 122 is in the first position P1. Lock position M1 that prevents the lock pin 122 from moving and a release position M2 that allows the lock pin 122 to move between the first position P1 and the second position P2, and thus the first lock When the operation member 160 is connected to the member 140 and the first lock member 140 is moved from the lock position M1 to the release position M2 by the operation member 160, the second lock member 150 is interlocked and the release position N2 from the lock position N1. Move to

  According to such a configuration, both the first lock member 140 and the second lock member 150 can be moved from the lock position M1, N1 to the release position M2, N2 simply by operating the operation member 160. Therefore, regardless of whether the lock pin 122 is in the first position P1 or the second position P2, the restraint by the first lock member 140 or the second lock member 150 can be easily released, and as a result, two frames It becomes possible to easily unlock the members 12 and 13.

  Further, according to the present embodiment, when the first lock member 140 is moved from the lock position M1 to the release position M2 by the operation member 160, the first lock member 140 presses the second lock member 150 and the second lock member 150 is moved. The lock member 150 is pushed up from the lock position M1 to the release position M2. In this case, a mechanism for moving the second lock member 150 from the lock position N1 to the release position N2 in a simple manner in conjunction with the movement of the first lock member 140 from the lock position M1 to the release position M2 is realized. be able to.

  Moreover, according to the present embodiment, the first lock member 140 pushes up the second lock member 150 from the lock position M1 to the release position M2 via the cushion material 170. In this case, physical wear and damage due to the contact between the first lock member 140 and the second lock member 150 can be avoided. As a result, it contributes to realizing the joint 100 with a locking function for a handcart with high reliability.

  Further, according to the present embodiment, the operation member 160 connects the sliding body 162 slidably attached to the one frame member 12, the sliding body 162 and the first lock member 140, and And an elongated member 161 for swinging the first lock member 140 in conjunction with the sliding operation. In this case, the two lock members 140 can be switched between the lock position M 1, N 1 and the release position M 2, N 2 simply by sliding the sliding body 162 along the one frame member 12. That is, it is excellent in the point which can perform switching operation of the two lock members 140 easily.

  Further, according to the present embodiment, the first biasing member 180 further includes the first biasing member 180 housed in the housing space 101 and bridged between the joint body 110 and the first lock member 140. The first lock member 140 is biased toward the lock position M1. In this case, since the first lock member 140 can be biased toward the lock position M1 by the first biasing member 180, the lock pin 122 located at the deployment use position P1 can be more reliably restrained. .

  Further, according to the present embodiment, the second biasing member 185 further includes the second biasing member 185 housed in the housing space 101 and bridged between the joint body 110 and the second lock member 150. The second lock member 150 is biased toward the lock position N1. In this case, since the second lock member 150 can be biased toward the lock position N1 by the second biasing member 185, the lock pin 122 located at the folding use position P2 can be more reliably restrained. it can.

  However, the first biasing member 180 and the second biasing member 185 are provided as necessary, and may not be necessarily provided.

  In the baby carriage 1 according to the present embodiment, the drive source 5 is connected to the wheel 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, 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-held baby carriage that provides a driving force to the wheels 4 in accordance with the traveling operation of the operator.

  A mechanism for assisting the drive of the wheel 4 is schematically shown in a block diagram in FIG. As shown in FIG. 9, drive elements 51 and 52 are connected to some of the plurality of wheels 4. The driving elements 51, 52 are components for driving the wheel 4, in other words, components for providing the wheel 4 with a driving force. In the present embodiment, two drive elements, ie, a first drive element 51 and a second drive element 52, are provided, the first drive element 51 driving the left rear wheel 42 and the second drive element 52 being the right rear The wheel 42 is to be driven.

  An example of the configuration of the drive elements 51 and 52 is shown in FIG. As shown in FIG. 10, each drive element 51, 52 includes a drive shaft 51a, 52a connected to the corresponding rear wheel 42, and a DC motor 51b, 52b for driving the drive shaft 51a, 52a. It is done. One end of the drive shafts 51a and 52a is connected to the corresponding rear wheel 42, supports the rear wheel 42 rotatably around the rotation axis Ar2, and is not pivotally supported. The other ends of the drive shafts 51a and 52a are connected to 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 integrated with the main axes of the DC motors 51b and 52b, or may be configured as separate members.

  The direct current motors 51b and 52b are disposed in a storage box 70 bridged to the left and right side base frames 11a and 11b, and supported by the side base frames 11a and 11b in the storage box 70. FIG. 11 is a circuit diagram showing the connection relationship between the DC motors 51b and 52b. As shown in FIG. 11, 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. By connecting two DC motors 51b and 52b in series, they contribute to adjusting the driving force in accordance with the load from the ground plane, which will be described later.

  Returning to FIG. 9, each drive element 51, 52 is 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 drive elements 51 and 52 based on the information from the detection element 6 to adjust the driving force from the drive elements 51 and 52 to the wheel 4. Further, the control device 7 is connected to a power supply 75 which is removably fixed to the housing box 70. Such a control device 7 can be realized, for example, in the form of a microcontroller including a central processing unit (CPU) and a register (REGISTER) or a programmable controller (PLC).

  The detection element 6 is for detecting information related to the traveling operation input to the baby carriage body 2. The information related to the traveling 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 main body 2. Information on the load from the hand operating the steering wheel 20 or information on the speed at which the operator travels the stroller 1 and the number of rotations of the wheel 4 related to the speed may be detected as an example of the information on the traveling operation.

  Returning to FIG. 2, the detection element 6 according to the present embodiment is provided on the handle 20, and information on the load applied to the handle 20, in other words, information capable of specifying the load applied to the handle 20 It is configured to 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.

  The handle 20 is shown enlarged in FIG. As shown in FIG. 12, a grip 21 on which the operator's hand is hung is disposed on the handle 20, and the handle body 22 connects the grip 21 and the stroller main body 2. The handle body 22 is fastened to the upper frame 12 at a connection point c1 with the upper frame 12.

  In particular, the column 22a extends from the rear upper frame 12d and the side bars 22b and 22c are disposed on both sides of the column 22a as elements constituting the handle body 22. 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 bridged between the left side bar 22b and the column 22a. The grip portion 21b is bridged between the right side bar 22c and the column 22a.

  FIG. 13 shows the detection element 6 provided in the column 22a in an enlarged manner, and FIG. 14 shows a circuit diagram of the detection element 6. As shown in FIG. As shown in FIGS. 13 and 14, a plurality of strain gauges 61 as the detection element 6 are attached to the inner square 22 d in the column 22 a. The plurality of strain gauges 61 constitute a bridge circuit to measure the strain of the handle body 22. In the example shown in FIG. 13, 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 identical to one another. In addition, although the inner square member 22d to show in figure is hollow, it may be solid.

  FIG. 15 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. 15, the horizontal axis indicates the strain detected by the strain gauge 61, and the strain gauge 61 attached to the upper surface of the inner square 22d is extended or attached to the lower surface of the inner square 22d. When the attached strain gauge 61 is contracted is a positive value, and the strain gauge 61 attached to the upper surface of the inner square 22d is contracted or the strain attached to the lower surface of the inner square 22d The case where the gauge 61 is extended is a negative value. The vertical axis represents the driving force for driving the wheel 4, the driving force for rotating the wheel 4 in the forward direction is a positive value, and the driving force for rotating the wheel 4 in the reverse direction is a negative value.

  As shown in FIG. 15, when the magnitude of the strain detected by the strain gauge 61 is smaller than the lower limit value α1, the control device 7 controls so as not to provide the wheel 4 with the driving force by the driving elements 51 and 52. Thereby, even if disturbance or an unintended operation is applied to the baby carriage 1, it is possible to prevent the baby carriage 1 from moving unintentionally.

  When the magnitude of the strain detected by the strain gauge 61 becomes larger than the lower limit value α1, the controller 7 controls the driving force of the drive elements 51 and 52 in proportion to the magnitude of the strain detected by the strain gauge 61. Control to provide to. In the graph of FIG. 15, 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 retracted. Provide a driving force to rotate in the direction.

  On the other hand, when the magnitude of the distortion applied to the steering wheel 20 becomes larger than the upper limit value α2, the control device 7 controls the drive force by the drive elements 51 and 52 to provide the wheel 4 as the upper limit drive force F.

  Next, the operation of the baby carriage 1 configured as described above will be described.

  In particular, as can be understood from FIG. 2, the four strain gauges 61 constituting the sensing element 6 are located above the grip 21 in the vertical direction d3, and the grip 21 is located rearward and below the connecting point c1. Located at the According to such an arrangement, the strain gauge 61 acts as shown in FIGS. 16 to 19 below. 16 to 19 are diagrams for explaining the operation of the strain gauge 61 when the handle 20 is operated. In the following description, when the inner square 22d is divided into two parts in 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 Figure 13).

  As shown in FIG. 16, 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 rod 22d extends and the lower area A2 contracts. Information in which the upper area A1 extends and the lower area A2 contracts is measured by the four strain gauges 61. The information measured by the strain gauges 61 is sent to the control device 7. The control device 7 having received the information recognizes that the grip 21 is 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. 61 provides a current according to the measured value. Thus, 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. Thus, the drive shafts 51a and 52a assist the rotation of the rear wheel 42, so that the burden on the operator to push the stroller 1 forward is reduced.

  When there is a level difference on the traveling surface, the operator pushes the grip 21 downward in the vertical direction d3 to lift the front wheel 41. As shown in FIG. 17, when the operator pushes the baby carriage 1 downward, the upper area A1 of the inner square bar 22d extends and the lower area A2 contracts as in the case of FIG. Information in which the upper area A1 is extended and the lower area A2 is contracted is measured by four strain gauges 61 and sent to the control device 7. The control device 7 having received the information recognizes that the grip 21 is pushed forward or pushed downward, and the value measured by the strain gauge 61 in the circuit in which the two DC motors 51 b and 52 b are connected in series. Provide a corresponding current. Thus, 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 downward, 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 to get over the step, the driving power from the driving source 5 can be assisted, and the baby carriage 1 can be pushed forward without an excessive burden.

  On the other hand, when pushing down the stroller 1 on a downhill, as shown in FIG. 18, the operator holds the grip 21 and pulls the stroller 1 rearward in the front-rear direction d1. In this case, contrary to the case of FIGS. 16 and 17, the upper area A1 of the inner square rod 22d extends the contraction lower area A2. Information in which the upper area A1 is expanded and the contracted area A2 is extended is measured by the four strain gauges 61 and sent to the control device 7. The control device 7 having received the information recognizes that the grip 21 is pulled backward, and the current corresponding to the value measured by the strain gauge 61 in the circuit in which the two DC motors 51b and 52b are connected in series is shown in FIG. It provides in the reverse direction to the case of 16 and FIG. Thus, 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 manner, the drive shafts 51a and 52a assist the rotation of the rear wheel 42, thereby reducing the burden of the operator pulling the stroller 1 rearward.

  Next, when the stroller 1 is pivoted, as shown in FIG. 19, the stroller 1 can be pivoted by causing a difference in force to push the two grip portions 21a and 21b forward. In the example shown in FIG. 19, the baby carriage 1 can be turned counterclockwise by increasing the force applied to the grip portion 21b on the right side of the grip portion 21a on the left side. Even when different forces are applied to the two grip portions 21a and 21b, the upper area A1 of the inner square rod 22d extends and the lower area A2 shrinks, as in the case of FIG. Information in which the upper area A1 is extended and the lower area A2 is contracted is measured by four strain gauges 61 and sent to the control device 7. The control device 7 having received the information recognizes that the grip 21 is pushed forward or pushed downward, and the value measured by the strain gauge 61 in the circuit in which the two DC motors 51 b and 52 b are connected in series. Provide a corresponding current. When two DC motors 51b and 52b are configured identically in the series circuit shown in FIG. 11, the magnitudes of the currents flowing through the two DC motors 51b and 52b are also equal. The driving forces provided are also considered to be equal.

  However, when the stroller 1 is turned counterclockwise, a larger resistance from the ground contact surface is applied to the left wheel 4 serving as the inner ring than on the right wheel 4 serving as the outer ring, and the DC connected to the left wheel 4 serving as the inner ring The motor 51b becomes difficult to rotate. When the rotation speed of the DC motor 51b connected to the left wheel 4 as the inner ring is reduced, the back electromotive force generated in the DC motor 51b is reduced, and a large amount of current can easily flow in 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 relatively increases, and it is possible to provide a larger driving force to the right wheel 4 serving as the outer ring. As a result, the right wheel 4 serving as the outer ring can be easily rotated, and as a result, the turning operation can be smoothly performed.

  As described above, the baby carriage 1 according to the present embodiment spans the base frame 11 supporting the plurality of wheels 4, the upper frame 12 supporting the seat units 8a and 8b, and the base frame 11 and the upper frame 12 A baby carriage main body 2 having a link member 13 connected to the upper frame 12 via the above-described lock function joint 100, and the baby carriage main body 2 and driving to at least one of the plurality of wheels 4 The drive source 5 is controlled based on the information detected by the drive source 5 that provides the force, the detection element 6 that detects information related to the traveling operation input to the stroller main body 2, and the information detected by the detection element 6. And a control device 7 for adjusting the driving force to the wheels 4, wherein the upper frame 12 is pivoted relative to the link member 13 via the joint 100 with a locking function. It has become foldable with respect to the base frame 11. According to such a configuration, since the driving force to the wheels 4 by the drive 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, among the plurality of wheels 4, the wheels provided with the driving force from the drive source 5 are the rear wheels 42, and the front wheels 41 of the plurality of wheels 4 are via the casters 3. And is supported by the baby carriage body 2. Since the front wheels 41 are supported by the stroller main body 2 via the casters 3, the turning operation of the stroller 1 can be smoothly performed. Further, considering that the handle 20 operated by the operator is located rearward and the center of gravity of the baby who gets on the stroller 1 is considered, the rear wheel 42 can be said to be easily loaded and stably grounded on the ground surface. The drive assist from the drive source 5 can be stably realized by providing the driving force from the drive source 5 to the rear wheel 42 that is stably grounded.

  Further, according to the present embodiment, the drive source 5 is provided with the first drive element 51 for providing the driving force to at least one of the plurality of wheels 4 and the first drive element 51 of the plurality of wheels 4. And provides a driving force to the wheel 4 different from the wheel 4 to which the driving force is provided, and has a second driving element 52 provided separately from the first driving element 51. According to such a configuration, providing different driving forces to different wheels 4 contributes to realizing the distribution of appropriate driving forces according to the traveling state of the stroller 1.

  Further, according to the present embodiment, the wheel 4 provided with the driving force from the first drive element 51 and the wheel 4 provided with the drive force from the second drive 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 supply 75. It is connected to the. When the stroller 1 is turned, a larger resistance from the ground contact surface is applied to the wheel 4 serving as the inner ring than the wheel 4 serving as the outer ring. Therefore, 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 becomes difficult to rotate. When the number of rotations of the direct current motor 51b connected to the wheel 4 serving as the inner ring decreases, the back electromotive force generated in the direct current motor 51b decreases, and a large amount of current easily flows in the series circuit. As a result, the current flowing to the DC motor 52b connected to the wheel 4 serving as the outer ring relatively increases, and it is possible to provide a larger driving force 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 ring can be easily rotated during the turning operation, and the turning operation can be smoothly performed.

  Further, according to the present embodiment, the baby carriage main body 2 has the frame main body 10 supporting the plurality of wheels 4 and the handle 20 connected to the frame main body 10, and the detection element 6 Provided to detect information on the load applied to the handle 20. Providing a driving force from the drive source 5 to the wheels 4 according to the operator's intention regarding the traveling operation by selecting the information regarding the load applied to the steering wheel 20 as the information regarding the traveling operation input to the stroller main body 2 Is possible.

  Further, according to the present embodiment, the handle 20 has the operation member 21 on which the operator's hand is hung and the handle main body 22 connecting the operation member 21 and the stroller main body 2, and the control device 7 When the detection element 6 detects that the operation member 21 is pushed forward or pushed downward, the drive source 5 is provided with a driving force for moving the wheel 4 forward, and the detection element 6 operates the operation member. When the information 21 is detected to the rear, the drive source 5 is provided with a driving force for retracting the wheel 4. According to such a configuration, the driving force to the wheel 4 by the driving source 5 can be adjusted in accordance with the operation of the operation member 21 by the operator. In particular, according to the present embodiment, even when the operation member 21 is pushed downward so as to float the front wheel 41 in order to get over the steps or the like on the ground contact surface, the drive source 5 drives the wheel 4 to move forward. Do. For this reason, even during the operation to get over the step, the baby carriage 1 can be pushed forward without an excessive burden while receiving the assistance of the driving force by the driving source 5.

  Further, according to the present embodiment, the sensing element 6 includes a plurality of strain gauges 61 attached to the handle body 22 of the handle 20, and at least one strain gauge 61 is such that the operation member 21 is pushed forward or When the operation member 21 is pulled downward, it is expanded when it is pushed downward, and contracted, or when the operation member 21 is pushed forward or when it is pushed downward, the contraction operation member 21 is extended when it is drawn backward. According to such a mode, since the detection element 6 is realized by the strain gauge 61, it is possible to stably detect the information that the operator operates the operation member 21 while avoiding the complicated structure. From the viewpoint of detecting the information for operating the operating member 21 more stably by the operator, the operating member 21 is located at a position behind and below or behind the connecting point c1 between the handle main body 22 and the frame main body 10 It should be located at

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

  Further, according to the present embodiment, the opening 113 of the joint body 110 is directed in the direction along the rotation axis R1, and the rotation axis R1 is along the left-right direction d2. In this case, when the upper frame 12 and the link member 13 are relatively rotated via the joint 100, a gap opened in the left-right direction d2 is generated between the two frame members 12 and 13. When a gap opened in the left-right direction d2 is generated between the two frame members 12 and 13, unlike the gap opened upward, there is a low possibility that clothes or the like may be caught. As a result, the marketability of the stroller 1 can be improved.

  Note that various modifications can be made to the embodiment described above. Hereinafter, an example of a modification is demonstrated.

  For example, in the embodiment described above, an example is shown in which two seat units 8a and 8b are provided side by side, but the number of 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 back and forth.

  In the embodiment described above, the DC motors 51b and 52b of the two drive elements 51 and 52 are connected in series to the power supply 75. However, the circuit design for the DC motors 51b and 52b is the same as described above. It is not limited to the example. The DC motors 51 b and 52 b of the two drive elements 51 and 52 may be connected in parallel to the power supply 75.

  Moreover, although the example which the detection element 6 consists of the strain gauge 61 was shown in embodiment mentioned above, the form of the detection element 6 is not limited to the example mentioned above. The detection element 6 is optional as long as it can detect information on the traveling operation input to the stroller main body 2, and as another example, it is configured as a torque sensor, a pressure sensor, a magnetostrictive sensor or the like attached to the handle main body 22. It may be done. For example, as a pressure sensor, the load applied to the handle 20 is regarded as a change in pressure of the working fluid, and the change in pressure is measured by a pressure-sensitive element through a diaphragm and then output as an electrical signal May be

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

  Moreover, although the example which applied the lock function 100 for handcarts with the lock function to the baby carriage 1 was shown in embodiment mentioned above, the application object of the said joint 100 is not limited to the baby carriage 1. FIG. The lockable joint 100 for a handcart is widely applicable to any vehicle that can be pushed forward by the hand of the operator. As another example of application of the locking function joint 100 for a wheelbarrow, there may be mentioned a transport cart for carrying a load, and a pet cart for traveling while accommodating animals (pets).

  Although some modifications to the above-described embodiment have been described above, it is of course possible to apply a plurality of modifications in combination as appropriate.

Claims (6)

Locking joint for handcarts that connects two frame members so as to be switchable between a state in which relative rotation of the two frame members is permitted and a state in which the relative rotation of the two frame members is restricted And
A joint body attached to the first frame member to form a storage space;
A holder attached to another frame member,
A fulcrum pin passing through both the joint body and the holder such that the joint body and the holder can be relatively rotated;
A first lock member and a second lock member pivotally supported by the joint body in the housing space;
Equipped with
The holder is movable in such a manner that the holder can move between a first position and a second position according to relative rotation between the joint body and the holder within an elongated hole formed in the joint body. Have a lock pin inserted in the
The first lock member is engaged with the lock pin at the first position to prevent the lock pin from moving to the second position, the lock pin at the first position, and the lock position. Swingable between a release position allowing movement between the second position and
The second lock member is engaged with the lock pin at the second position to prevent the lock pin from moving to the first position, the lock pin at the first position, and the lock position. Swingable between a release position allowing movement between the second position and
An operation member is connected to the first lock member, and when the first lock member is moved from the lock position to the release position by the operation member, the second lock member is also interlocked with the lock position from the lock position. Locked joint for hand carts to move to the release position.   When the first lock member is moved from the lock position to the release position by the operation member, the first lock member presses the second lock member to move the second lock member from the lock position to the release position. The joint with a lock function for a handcart according to claim 1, which is pushed up.   The operation member connects a sliding body slidably attached to the one frame member, the sliding body and the first lock member, and the first lock interlocks with the sliding movement of the sliding body. The joint for handcarts according to claim 1 or 2, further comprising: an elongated member for swinging the member. It further comprises a first biasing member housed in the housing space and bridged between the joint body and the first locking member,
The joint for handcarts according to any one of claims 1 to 3, wherein the first biasing member biases the first lock member toward the locking position. 5. A base frame supporting a plurality of wheels, an upper frame supporting a seat unit, the base frame and the upper frame being bridged, wherein the upper frame is made according to any one of claims 1 to 4. A stroller body having a link member connected via a lockable joint for a handcart,
The stroller according to claim 1, wherein the upper frame is foldable relative to the base frame by pivoting relative to the link member via the locking function joint. A drive source supported by the stroller body to provide a driving force to at least one of the plurality of wheels;
A detection element that detects information related to a traveling operation input to the baby carriage body;
The stroller according to claim 5, further comprising: a control device that controls the drive source based on information detected by the detection element to adjust a drive force from the drive source to the wheel.

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