TWI625261B - Baby carriage - Google Patents

Abstract

The invention provides a stroller having a switching mechanism for operating a locking member that restricts rotation of a wheel. The switching mechanism includes a first switching member provided on the handle and operable as the handle swings, a second switching member supported on the rear foot and operable on the rear foot as the first switching member operates, and a second switching member A transmission device that transmits the movement of the switching member toward the locking member. The first switching member has a cam abutting surface that abuts the second switching member when in operation, and the second switching member has a cam receiving piece that receives the cam abutting surface. The position of the cam receiving piece that contacts the cam abutting surface will follow The swing of the handle changes.

Description

Baby carriage Field of invention

The present invention relates to a stroller with a handle swingable between a position inclined forward and a position inclined rearward.

Background of the invention

It is known that a stroller has a handle that can be swung to a first position (back pushing position) tilted more rearward than the vertical axis, and a first position tilted more forward than the vertical axis in a side view. Between 2 positions (opposite face pushing position). When considering the operability of such a stroller, a so-called wheel holding unit serving as a caster is used on both the front foot and the rear foot. The wheel holding unit includes a rotatable body for holding the wheel and a rotation axis with the wheel. A non-parallel axis is used as the center to support the rotating body as a rotatable fixed body, and it is preferable that the rotating body of the wheel holding unit mounted on the foot on the front side in the direction of rotation can be rotated relative to the fixed body. The rotation body of the foot on the rear side in the direction is rotated relative to the fixed body. In addition, the baby carriage disclosed in Japanese Patent JP2008-254693A is provided with a switching mechanism that can automatically switch a state in which the rotating body is rotatable relative to the fixed body and a state in which it is not rotatable according to the position of the handle.

The above-mentioned switching mechanism is very useful. On the other hand, it has a large size due to its complicated structure, and as a result, it tends to become heavy. The present invention has been made in consideration of the above-mentioned points, and an object thereof is to provide a baby carriage which has a miniaturized switching mechanism.

The stroller of the present invention comprises: a stroller body having front and rear feet; a handle connected to the stroller body so as to be swingable; and a wheel holding unit which is a wheel holding unit provided on at least one of the front foot and the rear foot, and A wheel, a rotatable body supporting the wheel, a rotatable body mounted on at least one of the front foot and the rear foot, and a rotatable fixed body supported on an axis that is not parallel to the axis of rotation of the wheel, And a locking member that is movable between a locked position that restricts the rotation of the rotating body relative to the fixed body, and a lock release position that allows the rotating body to rotate relative to the fixed body; and the stroller is provided with: a switching mechanism In response to the swing of the handle relative to the stroller body, the lock member is moved from the lock release position to the lock position or from the lock position to the lock release position; the switching mechanism includes: provided on the handle and The first switching member that can be moved in response to the swing of the handle is supported on the front The second switching member, which is capable of operating the rear foot in response to the operation of the first switching member, and the transmission device that transmits the operation of the second switching member to the locking member, the first switching member includes: With the swing of the handle At this time, the second contacting member is in contact with the second contacting member and causes the second contacting member to act on the rear foot. The second contacting member has a cam receiving piece that receives the cam contacting surface, and among the cam receiving pieces, The position in contact with the abutting surface of the cam changes with the swing of the handle.

In the stroller of the present invention, when the handle is swung in a certain direction relative to the stroller body, the position of the cam receiving piece that is in contact with the cam contact surface will be upstream from the movement path of the cam contact surface. The side changes toward the downstream side.

In the stroller of the present invention, the handle may be swingable between a first position and a second position relative to the stroller body. In a state where the handle is disposed at the first position, the cam contact surface is disposed at The cam is only in contact with a part of the portion of the cam receiving piece that comes into contact with the handle while it swings from the first position to the second position, and the cam abuts when the handle is disposed in the second position. The surface is disposed at a position facing a part of the portion of the cam receiving piece that is in contact with the cam receiving piece only while the handle is swung from the first position to the second position.

In the stroller of the present invention, the cam contact piece may have at least two cam receiving protrusions protruding toward the cam contact surface, and the cam receiving protrusions are disposed along the handle along the cam contact surface. The swinging path is separated from the position.

In the stroller of the present invention, the handle may be swingable between a first position and a second position relative to the stroller body, and the handle When the cam contact surface is arranged at a position between the first position and the second position, the cam contact surface is brought into contact with two adjacent cam receiving protrusions simultaneously along a movement path of the cam contact surface.

In the stroller of the present invention, the handle may be swingable between the first position and the second position relative to the stroller body, and the cam contact piece has two cam receiving protrusions protruding toward the cam contact surface. The cam receiving protrusions are the first cam receiving protrusions located on the upstream side of the moving path of the cam abutting surface when the handle is moved from the first position to the second position, and the second cam receiving positions on the downstream side. In the state where the handle is disposed at the first position, the cam abutting surface is only a surface opposite to the first cam receiving protrusion among the first cam receiving protrusion and the second cam receiving protrusion. And in contact with the first cam receiving protrusion, in a state where the handle is disposed at the second position, the cam abutting surface is only between the first cam receiving protrusion and the second cam receiving protrusion, and only The second cam receiving protrusion faces the second cam receiving protrusion and faces the second cam receiving protrusion.

In the stroller of the present invention, when the handle is disposed at a first intermediate position between the first position and the second position, the cam abutting surface, the first cam receiving protrusion, and the second The two surfaces of the cam receiving protrusion are opposite to each other and are only in contact with the first cam receiving protrusion. When the handle is disposed at a second intermediate position between the first intermediate position and the second position, the cam abutting surface. Faces opposite to the first cam receiving protrusion and the second cam receiving protrusion are in contact with only the second cam receiving protrusion.

In the stroller of the present invention, when the handle is disposed at a position between the first intermediate position and the second intermediate position, the cam abutting surface and the first cam receiving protrusion and the second cam may be disposed. The two sides of the protruding portion are contacted.

In the stroller of the present invention, when viewed along the swing axis of the handle relative to the stroller body, the linear distance from the swing axis of the handle relative to the stroller body to each position of the cam contact surface is When the handle is swung from the first position to the second position, one end of the cam contact surface on the front side in the moving direction is gradually extended toward the other end of the cam contact surface on the rear side in the moving direction, and the handle is gradually extended. When disposed toward the second position, the linear distance from the swing axis of the handle relative to the stroller body to the second cam receiving protrusion is greater than the distance from the swing center of the handle relative to the stroller body to the first cam. The straight line distance of the receiving projection is shorter.

In the stroller of the present invention, when viewed along the swing center of the handle relative to the stroller body, the linear distance from the swing center of the handle relative to the stroller body to each position of the cam contact surface is When the handle is swung from one side to the other within the swingable range, one end of the cam contact surface on the front side in the moving direction is gradually extended toward the other end of the cam contact surface on the rear side in the movement direction, and The width of the cam contact surface in a direction parallel to the swing axis of the handle is gradually widened from one end of the cam contact surface to the other end of the cam contact surface on the rear side in the moving direction.

According to the present invention, the switching mechanism can be miniaturized.

10‧‧‧ stroller

11‧‧‧Baby stroller body

13‧‧‧ Shaft member

15‧‧‧body frame

17‧‧‧ rely on

18‧‧‧ rear link

19‧‧‧Protective member

20‧‧‧ Forefoot

21‧‧‧ hind foot

22‧‧‧The first link element

24‧‧‧ 2nd link element

25‧‧‧The second link body

25a‧‧‧through hole

26‧‧‧ 2nd connecting rod end member

26b‧‧‧3rd protrusion 26b

26b1‧‧‧ raised surface

26b2‧‧‧face

28‧‧‧3rd link element

29‧‧‧3rd link body

29a, 30a‧‧‧through hole

30‧‧‧ 3rd connecting rod end member

30b‧‧‧ 2nd bump

30b1‧‧‧ raised surface (outer surface)

32‧‧‧ Front foot support element

32a‧‧‧ Support recess

33‧‧‧ Cloth piece receiving member

35‧‧‧state maintenance agency

35a‧‧‧Remote operation device

35b‧‧‧operating component

35c‧‧‧Motion limiting member

37‧‧‧handle fixing bolt

40‧‧‧ cloth support unit

41b‧‧‧Bottom link

41‧‧‧upper support element

45‧‧‧side support element

45a‧‧‧Front and bottom joint

45b‧‧‧Back upper link

46‧‧‧Links

50‧‧‧ Seat Facial Support Elements

50a‧‧‧through hole

51‧‧‧Face Support Frame

51a‧‧‧U-shaped end

52a‧‧‧A pair of side frames

53‧‧‧Frame end member

54‧‧‧A pair of rear connecting parts

54a‧‧‧ raised receiving section

54a1‧‧‧ raised bearing surface

55‧‧‧Base cloth

55a‧‧‧Support through hole

56‧‧‧Main cloth section

57‧‧‧ tube

58‧‧‧Belt

60‧‧‧Backrest support element

60a‧‧‧through hole

61‧‧‧Main back panel

62‧‧‧ bottom connection

62a‧‧‧ raised

62a1‧‧‧ raised surface

62b‧‧‧ raised receiving section

68‧‧‧link frame components

70‧‧‧handle

71‧‧‧ elastomer

71a, 74a, 75a‧‧‧through holes

72a‧‧‧handle main part

72b‧‧‧handle connecting part

73‧‧‧ swing limit member

74‧‧‧Handle end member

75‧‧‧The first switching component

75b‧‧‧ raised receiving section

76‧‧‧ cam contact surface

76a‧‧‧End

76b1‧‧‧ raised bearing surface

76b‧‧‧ raised receiving section

76b2, 76b3‧‧‧ face

80‧‧‧The second switching component

81‧‧‧ cam receiving piece

82a, 82b ‧‧‧ cam receiving protrusion

83‧‧‧ relay component

84‧‧‧ holding department

85‧‧‧ Empowering Potential

86b‧‧‧ 2nd cam receiving protrusion

87‧‧‧ communication device

87a‧‧‧ cylindrical member

87b‧‧‧Wire

88‧‧‧ Switch mechanism

90‧‧‧ Basket

91‧‧‧ underside

92‧‧‧ rear surface

93‧‧‧ front surface

94‧‧‧ side

94a‧‧‧ side reinforcement

96‧‧‧ floor

97‧‧‧ rear panel

98‧‧‧Connecting material

98a‧‧‧Seam

99‧‧‧ Empowering Potential

100‧‧‧ Wheel holding unit

101‧‧‧ Wheel

103‧‧‧Compression spring

105‧‧‧Fixed body

106‧‧‧ Containment Department

107‧‧‧holding department

108‧‧‧ support shaft member

110‧‧‧rotating body

111‧‧‧ swing shaft member

113‧‧‧ axle

114‧‧‧ engagement recess

114a‧‧‧Bottom cone

115‧‧‧ support block

116‧‧‧Support Board

117‧‧‧section

120‧‧‧ Wheel cage

121‧‧‧ holder base

121a‧‧‧ support protrusion

122‧‧‧Upward extension

123‧‧‧ convex

125‧‧‧ the first elastic structure

126‧‧‧ Elastomer

126a‧‧‧Receiving Department

127‧‧‧Second elastic structure

128‧‧‧ bags

128a‧‧‧ recess

128b‧‧‧step difference

128c‧‧‧Fastener receiving department

129‧‧‧brake member

129a‧‧‧brake protrusion

130‧‧‧Locking member

131‧‧‧ base

131a‧‧‧Spring bearing surface

135‧‧‧Spring side extension

136‧‧‧ sidewall

137‧‧‧Joint wall

141‧‧‧wheel side extension

141a‧‧‧Front cone

142‧‧‧ sidewall

143‧‧‧Joint wall

150‧‧‧ Cloth

153‧‧‧links

156‧‧‧Face

157‧‧‧back

160‧‧‧ Left and right side

161‧‧‧side body part

161a‧‧‧ Connected to the seat face 1 part

161c‧‧‧Part 3 connected to the side joint

161b‧‧‧Part 2 placed between Part 1 and Part 3

162a‧‧‧1st crease

162b‧‧‧2nd crease

163a, 163b, 163c‧‧‧ Reinforcement members

165‧‧‧side connection

167‧‧‧Upper side

169‧‧‧upper

170‧‧‧ Cover

Ac‧‧‧ caster axis

Ar‧‧‧ rotation axis

da‧‧‧ axis direction of shaft member

db‧‧‧ axis

La, Lb, Lc‧‧‧Straight distance

sc1, sc2‧‧‧oscillation axis

w‧‧‧ cam contact surface width

FIG. 1 is a diagram for explaining an embodiment of the present invention, and shows a perspective view of the stroller in a state where the back of the cloth sheet is raised and the handle is arranged at the first position.

FIG. 2 is a perspective view showing the stroller of FIG. 1 in a state where the back of the cloth sheet is tilted and the handle is disposed at the second position.

Fig. 3 is a perspective view showing the baby carriage of Fig. 1 with the cloth sheet removed, in a state where the back support member of the cloth sheet support unit is upright and the handle is arranged at the first position.

FIG. 4 is a perspective view showing the baby carriage of FIG. 2 with the cloth sheet removed with the backrest support element of the cloth sheet support unit tilted down and the handle disposed at the second position.

FIG. 5 is a side view of the stroller of FIG. 3. FIG.

Fig. 6 is a side view of the stroller of Fig. 4.

Fig. 7 is a side view showing the folded state of the baby carriage of Fig. 1 with the cloth sheet removed.

FIG. 8 is a view showing a part of the baby carriage centered on the cloth support unit, and is a side sectional view of the baby carriage in the state of FIG. 3.

FIG. 9 is a diagram showing a part of a baby carriage centered on a cloth support unit, and a side sectional view of the baby carriage in a state where a backrest supporting element of the cloth support unit is tilted.

FIG. 10 is a perspective view showing a cloth support unit.

FIG. 11 is a perspective view showing a connection portion between the cloth support unit and the main body frame from the inner side in the width direction.

FIG. 12 is a perspective view showing a connection portion between the cloth support unit and the main body frame from the inner side in the width direction.

13 is a cross-sectional view showing a cross-section of a connection portion between the cloth support unit and the main body frame along a width direction.

FIG. 14 is a partial perspective view showing a connection portion between the handle and the stroller body from the width direction outside.

FIG. 15 is a side view showing a connection portion between the handle and the stroller body from the outside in the width direction.

FIG. 16 is a perspective view showing a connection portion between the handle and the stroller body from the outside in the width direction.

FIG. 17 is a side view schematically showing a connection portion between the handle and the stroller body from the outside in the width direction, and is a diagram for explaining the operation of the switching mechanism.

18 is a side view schematically showing a connection portion between the handle and the stroller body from the outside in the width direction, and is a diagram for explaining the operation of the switching mechanism.

FIG. 19 is a side view schematically showing a connection portion between the handle and the stroller body from the outside in the width direction, and is a diagram for explaining the operation of the switching mechanism.

FIG. 20 is a side view schematically showing a connection portion between the handle and the stroller body from the outside in the width direction, and is a diagram for explaining the operation of the switching mechanism.

FIG. 21 is a side view schematically showing a connection portion between the handle and the stroller body from the outside in the width direction, and is used to explain the operation of the switching mechanism Illustration.

FIG. 22 is a perspective view showing a wheel holding unit in a state where a single wheel is removed. FIG.

FIG. 23 is a side view showing a wheel holding unit in a state where a wheel is removed. FIG.

FIG. 24 is a perspective view showing a second elastic structure of the wheel holding unit.

FIG. 25 is a cross-sectional view of the wheel holding unit taken along XXIII-XXIII of FIG. 23 and is a diagram for explaining the operation of the lock member.

FIG. 26 is a cross-sectional view similar to FIG. 25 and is a diagram for explaining the operation of the locking member.

Fig. 27 is a perspective view showing a locking member.

FIG. 28 is a plan view showing the cloth sheet in an unfolded state.

FIG. 29 is a side view showing a cloth sheet in a state of being supported by the cloth sheet supporting unit of FIG. 8. FIG.

FIG. 30 is a side view showing a cloth sheet in a state supported by the cloth sheet supporting unit of FIG. 9.

FIG. 31 is a perspective view showing a bottom plate and a rear plate assembled in a basket portion from the front upward.

Fig. 32 is a perspective view showing a bottom plate and a rear plate assembled in a basket from below and below.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 32 are views for explaining an embodiment of a baby carriage of the present invention. Illustration.

<< Outline of baby carriage >>

1 to 32 show the overall structure of the baby carriage 10 according to this embodiment. The illustrated stroller 10 includes a stroller body 11 having a body frame 15 and a cloth support unit 40 supported on the body frame 15, a cloth sheet 150 mounted on the cloth support unit 40, and a The handle 70, the wheel holding unit 100 mounted on the front foot 20 and the rear foot 21 of the body frame 15, and the basket 90 supported on the stroller body 11. The cloth sheet 150 may use known components having cushioning properties, and is preferably attachable to and detachable from the cloth support unit 40. On the cloth sheet 150, infants can sit or sleep. Although not shown, other members such as a mask may be further provided on the stroller 10.

As shown in FIG. 7, in the baby carriage 10 of this embodiment, the front foot 20, the rear foot 21, and the handle 70 are brought close to each other and are foldable. Most of the components of the stroller body 11 are pivoted to each other for foldability. The cloth sheet 150 is formed using a flexible cloth material or the like, and can be deformed in accordance with the folding operation of the stroller 10.

In the present embodiment, the handle 70 is connected to the stroller body 11 and is swingable relative to the stroller body 11. The handle 70 can be swung in the first position (backward pressing position, rear position) shown in Figs. 1, 3, and 5 and the second position (opposite surface pressing) shown in Figs. 2, 4, and 6 Position, forward position). Therefore, it is possible to make it possible for the operator (protector) to hold the handle 70 from the back side of the infant and manipulate the stroller 10 and walk the stroller 10 so that the infant is directed forward in the progress direction, and the operation The person holds the handle 70 from the position on the foot side in front of the face opposite to the infant and controls the infant The stroller moves the stroller 10 so that the rear side of the stroller 10 becomes forward in the forward direction.

The wheel holding unit 100 mounted on at least one of the front foot 20 and the rear foot 21 is configured as a so-called caster. The caster has a rotating body 110 that holds the wheel 101 so as to be rotatable and is non-parallel to the rotation axis Ar of the wheel 101. An axis (also referred to as "caster axis Ac") is used as a center, and the rotating body 110 is supported as a rotatable fixed body 105. In addition, the stroller 10 is provided with a switching mechanism 88 that can automatically switch the state in which the rotating body 110 of the wheel holding unit 100 is rotatable relative to the fixed body 105 in accordance with the position of the handle 70. In particular, in this embodiment, both the front foot 20 and the rear foot 21 are provided with a wheel holding unit 100 configured as a caster, and the switching mechanism 88 corresponds to the position of the handle 70, so that the wheel mounted on the foot on the front side of the progress direction is held. The rotating body 110 of the unit 100 rotates about the caster axis Ac with respect to the fixed body 105, and restricts the rotating body 110 of the wheel holding unit 100 mounted on the foot on the rear side in the progress direction with respect to the fixed body 105 on the caster axis Ac. Rotate for the center.

However, in this specification, the terms "front", "rear", "up", and "down" of the stroller 10 and its constituent elements mean that the stroller 10 in the unfolded state is used without special instructions. "Before", "After", "Up" and "Bottom" based on infants and young children. Therefore, the so-called "front-rear direction" is a direction connecting the lower left and upper right of the paper surface of Figs. 1 to 4 and is equivalent to the direction connecting the left and right of the paper surface of Figs. In addition, as long as there is no special instruction, the so-called "front" is the side on which the infants and young children are facing, which is the lower left side of the paper surface of Figs. 1-4, and the left side of the paper surface of Figs. 5 and 6. It is "front side". On the other hand, the "up and down direction" is a direction orthogonal to the front-rear direction and orthogonal to the surface (ground) on which the stroller 10 is placed. Therefore, when the surface on which the stroller 10 is placed is a horizontal plane, the so-called "up and down direction" means the vertical direction. The "lateral direction" and the "width direction" refer to directions orthogonal to both the "front-rear direction" and the "up-down direction". Furthermore, the terms "right" and "left" also mean "right" and "left" in the lateral or width direction based on the infants and infants who ride the stroller 10, respectively.

As shown in the figure, the stroller 10 as a whole has a substantially symmetrical configuration with the widthwise center plane extending in the front-rear direction as a center. Hereinafter, each component of the baby carriage 10 of this embodiment will be described with reference to the drawings.

<< Baby stroller body and handle >>

The stroller body 11 includes a body frame 15 having a front foot 20 and a rear foot 21, and a cloth sheet supporting unit 40 connected to the body frame 15 through a shaft member 13. The cloth sheet supporting unit 40 is rotatably attached to the main body frame 15 through the shaft member 13. With this, the cloth support unit 40 can move relative to the main body frame 15 with the folding and unfolding movements of the stroller 10. The rotation center of the cloth sheet supporting unit 40 with respect to the main body frame 15 coincides with the axial direction da of the shaft member 13, and is particularly parallel to the width direction of the stroller 10 in the illustrated example. Further, in the present embodiment, the handle 70 passes through the shaft member 13 and is attached to the stroller body 11 so as to be swingable. The rotation center of the handle 70 with respect to the stroller body 11 coincides with the axial direction da of the shaft member 13, and is therefore parallel to the width direction of the stroller 10. First, the cloth support unit 40 of the stroller body 11 will be described, and then, the body frame 15 of the stroller body 11 will be described. The description will be made later with respect to the handle 70.

<Fabric support unit 40>

As shown in FIG. 2, FIG. 3, and FIGS. 8 to 10 in detail, the cloth support unit 40 includes a seat surface support element 50 that faces the buttocks of the infant and child who rides the stroller 10 from below, and a seat support element 50 from behind. The infant's back of the stroller 10 becomes the backrest support element 60 opposite to the infant. The backrest support member 60 is swingable (pourable) relative to the seat surface support member 50. Thereby, the stroller 10 can be tilted. The tilt angle of the backrest support member 60 can be controlled by adjusting the length of a tilt adjustment belt (not shown) that passes through the back of the backrest support member 60 and is mounted on the main body frame 15.

The seat surface support member 50 has a pair of rear connecting portions 54 arranged at the rear portion thereof apart from each other in the width direction. On the other hand, the backrest support member 60 has a pair of lower connection portions 62 that are arranged separately from each other in a width direction at a lower portion thereof. The left rear connection portion 54 is engaged with the left lower connection portion 62, and the right rear connection portion 54 is engaged with the right lower connection portion 62. By the engagement of the rear connecting portion 54 and the lower connecting portion 62, the backrest support member 60 is swingably connected to the seat surface support member 50. In the illustrated example, the pair of rear connection portions 54 are located on the inner side in the width direction of the pair of lower connection portions 62, but are not limited to this example. For example, the pair of lower connection portions 62 may be located in the width of the pair of rear connection portions 54 Direction inside.

As shown in FIG. 13, the rear connection portion 54 and the lower connection portion 62 are individually formed with a through hole 50 a and a through hole 60 a through which the shaft member 13 penetrates. As can be understood from FIG. 10 to FIG. 12, the pair of shaft members 13 are arranged separately in the width direction. Each shaft member 13 passes through the rear connecting portion 54 and the corresponding side. The through-hole 50a and the through-hole 60a of the lower connection part 62 are extended.

Further, the lower connecting portion 62 is provided with a protrusion (first protrusion) 62 a provided on a circumference centered on the axial direction da of the shaft member 13 and protruding in the axial direction da. The projection 62a has a projection surface (outer surface) located on the entire circumference or a part of the circumference centered on the axis direction da. On the other hand, the rear connecting portion 54 is formed with a convex receiving portion 54a that receives the convex surface 62a1 of the convex 62a. The convex receiving portion 54 a has a convex receiving surface 54 a 1 located on the entire circumference or a part of the circumference of the circumference centered on the axial direction da of the shaft member 13. When the rear connecting portion 54 and the lower connecting portion 62 rotate relatively, the convex surface 62a1 of the protrusion 62a and the convex receiving surface 54a1 of the convex receiving portion 54a will relatively slide. As described above, by engaging the protrusion 62a with the protrusion receiving portion 54a, the backrest support member 60 can swing relative to the seat surface support member 50. In particular, since the protrusion 62 a extends on the circumference centered on the axis direction da of the shaft member 13, the swing axis of the backrest support member 60 relative to the seat surface support member 50 will coincide with the axis direction da of the shaft member 13. Further, each projection 62a provided on one of the rear connection portion 54 and the lower connection portion 62 is fitted into the projection receiving portion 54a provided on the corresponding side of the other side of the rear connection portion 54 and the lower connection portion 62. In a state before the shaft member 13 penetrates, the seat surface support member 50 and the backrest support member 60 are also connected to each other in a state that they can swing relatively. However, unlike the illustrated example, a protrusion may be provided in the rear connection portion 54, and a protrusion receiving portion may be provided in the lower connection portion 62.

In the example shown in FIG. 13, the lower connection portion 62 of the backrest support member 60 is formed with a protrusion 62 a protruding inward in the width direction. The protrusion 62 a forms a part of the through hole 60 a through which the shaft member 13 penetrates. Towards width The protrusion 62 a protruding inward in the direction is looped around the circumference centered on the axis direction da of the shaft member 13. On the other hand, the rear surface connection portion 54 of the seat surface support member 50 is formed with a projection receiving portion 54a that receives the projection 62a. The convex receiving portion 54 a is formed by an inner peripheral surface of the through hole 50 a through which the shaft member 13 formed in the rear connection portion 54 passes. Therefore, in the illustrated example, the through hole 50 a of the rear connection portion 54 passes through the protrusion 62 a of the lower connection portion 62 and receives the shaft member 13. According to the above aspect, the length in the axial direction da of the through hole 60a formed in the backrest support element 60 can be made longer. Therefore, the cloth support unit 40 can be prevented from swaying with respect to the shaft member 13, and the relative swing of the cloth support unit 40 and the main body frame 15 passing through the shaft member 13 can be smoothed.

Hereinafter, the seat surface support element 50 and the backrest support element 60 of the illustrated embodiment will be further described in detail. The seat surface support element 50 includes a U-shaped seat surface support frame 51, a frame end member 53 individually attached to the U-shaped end portion 51a formed by the seat surface support frame 51, and a seat surface support frame. 51 的 基地 布 片 55。 51 of the base cloth sheet 55. The base cloth sheet 55 is shown in FIG. 10 only.

The seat surface support frame 51 includes a pair of side frame portions 52a and a connection frame portion 52b extending between the pair of side frame portions 52a. The pair of side frame portions 52a are configured to be symmetrical and extend in a slightly front-rear direction. The connection frame portion 52b is extended to connect the front end portions of the pair of side frame portions 52a. The seat surface support frame 51 may be a single material, for example, an integral part (member) formed by bending a metal pipe portion made of aluminum. The frame end member 53 is a component (member) extending in a plane orthogonal to the width direction, and can be formed using, for example, resin. Illustrated In the embodiment, the frame end member 53 is formed with a rear connection portion 54 that becomes a joint portion with the backrest support member 60.

The base cloth sheet 55 supported in a state of being opened to the seat surface support frame 51 is a cloth-like member formed of, for example, a cloth material or a mesh material. The illustrated base cloth sheet 55 has a main cloth sheet portion at least partially located in an area surrounded by three sides by a pair of side frame portions 52a and a connecting frame portion 52b of the seat surface support frame 51 in a plane view. 56. The cylindrical portion 57 and the belt portion 58 connected to or mounted on the main cloth piece portion 56. As shown in FIG. 10, the cylindrical portion 57 is connected to the front edge of the main cloth piece portion 56 to form a through hole extending in the width direction. In addition, the belt portion 58 is connected to the main cloth piece portion 56 at both ends thereof, and a support through hole 55 a is formed between the tape portion 58 and the main cloth piece portion 56. The rear end edge of the main cloth piece portion 56 is connected to a lower portion of the backrest support member 60 described below. The connecting frame portion 52b of the seat surface support frame 51 passes through the cylindrical portion 57 and the pair of side frame portions 52a passes through the support through hole 55a, so that the base cloth sheet 55 is mounted on the seat surface support frame 51 and the base cloth sheet. 55 can maintain the open state in both the forward and backward direction and the width direction.

The backrest support member 60 has a main back plate portion 61 formed in a flat plate shape. The pair of lower connection portions 62 which become one of the connection portions with the seat surface support member 50 extends downward from the main back plate portion 61. In addition, although detailed illustration is omitted, the main back plate portion 61 may be formed with a hole for ventilation or a heat sink for adjusting the amount of ventilation.

As shown in detail in FIG. 2, FIG. 3, and FIGS. 8 to 10, the fabric support unit 40 includes an upper support element 41 connected to the backrest support element 60 and swingable relative to the backrest support element 60, and individually and above Supporting components 41 and a side support element 45 connected to the main body frame 15. The side support element 45 is swingable relative to the upper support element 41 and the main body frame 15. As shown in detail in FIG. 10, in the present embodiment, the upper supporting element 41 is connected to the backrest supporting element 60 through two lower connecting portions 41 b which are arranged apart in the width direction. In addition, the side connection portions 41a on both sides of the upper support element 41 are connected to the side connection elements 45 on the corresponding side so that the upper connection portion 45b can rotate. On the other hand, the side support member 45 is connected to the main body frame 15 at the front and lower connection portions 45 a. In this embodiment, the front-side lower connection portion 45 a of the side support element 45 is pivotally connected to the second link element 24 described later on the main body frame 15.

However, it is not limited to the illustrated example. As an example, the lower support portion 45a before the side support element 45 may not be connected with the second link element 24, but with other parts of the main body frame 15, the seat surface support element 50, and the backrest. The part supporting member 60 and the like are pivoted.

As shown in FIGS. 2 to 6, 8, and 9, as the backrest support member 60 swings relative to the seat surface support member 50, the side support member 45 swings around the front and lower connection portions 45 a as a center. Accordingly, the side support element 45 is located on the side of the infant or child on the cloth sheet 150 when the cloth sheet 150 is inclined or not inclined. It should also be configured such that the side support element 45 has a connection function and corresponds to the swing of the backrest support element 60 relative to the seat surface support element 50 to swing the upper support element 41 relative to the backrest support element 60. In the baby carriage 10 of this embodiment, as shown in FIGS. 3 and 5, in a state where the backrest support member 60 is tilted, the upper support member 41 is erected relative to the backrest support member 60. Therefore, the cloth support unit can be Infants in the sleeping state on 40 are protected from the side by a pair of side support elements 45, and can also be protected from the rear by the upper support element 41. On the other hand, as shown in FIGS. 4 and 6, in a state in which the backrest support member 60 is erected, the upper support member 41 extends substantially parallel to the backrest support member 60. Therefore, an infant sitting on the cloth support unit 40 can be protected from the side by a pair of side support elements 45, and the upper support element 41 has a function of a headrest.

In this embodiment, as shown in FIG. 10, a connecting frame element 68 is provided between the frame end members 53 of the seat surface support element 50. Moreover, a tensile material (not shown) extends between the base fabric piece 55 and the connecting frame element 68, and the base fabric piece 55 can be stably maintained in an open state by using the tensile material. Moreover, according to the connection frame element 68, it is possible to prevent a member located on the outer side in the width direction of the fabric support unit 40 from falling down toward the inner side. The connection frame element 68 may be formed of a metal pipe portion made of, for example, aluminum.

<Body frame>

Next, the main body frame 15 supporting the cloth support unit 40 will be described in detail.

As shown in FIGS. 3 to 7 and FIGS. 11 to 14, the main body frame 15 includes a left and right front foot 20 and a left and right rear foot 21, a first link element 22 connecting the corresponding side front foot 20 and the rear foot 21, and a corresponding one. A second link element 24 connected to the first link element 22 on the side, left and right front foot support elements 32 connected to the corresponding side front foot 20, and a third link element 28 connected to the corresponding rear foot 21. The front foot 20 and the rear foot 21 are individually at upper portions thereof, are connected to the first link element 22 and are swingable relative to the first link element 22. 1st link element 22 is connected to the second link element 24 at the rear portion thereof and is relatively rotatable with the second link element 24. The first link element 22 has a function of an armrest. The second link element 24 is connected to the third link element 28 at a lower portion thereof and is rotatable relative to the third link element 28.

In the embodiment, the second link element 24 and the third link element 28 are connected to be rotatable relative to each other by the shaft member 13 penetrating the cloth support unit 40. In addition, since the shaft member 13 is used, the second link element 24 and the third link element 28 and the fabric support unit 40 can be relatively rotated. Therefore, the second link element 24, the third link element 28 of the main body frame 15, the seat surface support element 50 and the backrest support element 60 of the cloth support unit 40 extend along the axis of the shaft member 13 parallel to the width direction. The direction da is centered and relatively rotatable.

In the embodiment, the second link element 24 includes a second link body 25 connected to the first link element 22 at an upper portion thereof, and a second link body attached to an end portion below the second link body 25. Rod end member 26. The shaft member 13 penetrates a portion of the second link body 25 covered with the second link end member 26. Therefore, the second link body 25 and the second link end member 26 individually form through holes 25 a and 26 a through which the shaft member 13 passes and extends. On the other hand, the third link element 28 is connected to the rear leg 21 at a lower portion thereof and is rotatable relative to the rear leg 21. The third link element 28 includes a third link body 29 connected to the rear leg 21 at a lower portion thereof, and a third link end member 30 attached to an upper end portion of the third link body 29. The shaft member 13 penetrates the upper part of the third link element 28 covered with the third link end member 30. Therefore, the third link body 29 and the third link end member 30 individually form through holes 29 a and 30 a through which the shaft member 13 passes and extends.

In addition, the body frame 15 connected to the cloth support unit 40 through the shaft member 13 is provided with a second protrusion 30b provided on a circumference centered on the axis direction da of the shaft member 13 and protruding in the axis direction da. The projection 30b has a projection surface (outer surface) 30b1 on the entire circumference or a part of the circumference centered on the axis direction da. The sheet support unit 40 is formed with a second projection receiving portion 62b that receives the projection surface 30b1 of the second projection 30b. The convex receiving portion 62 b has a convex receiving surface 62 b 1 located on the entire circumference or a part of the circumference centered on the axial direction da of the shaft member 13. When the main body frame 15 and the cloth support unit 40 are relatively rotated, the convex surface 30b1 of the second protrusion 30b and the convex receiving surface 62b1 of the second convex receiving portion 62b will relatively slide. As described above, by engaging the second protrusion 30b with the second protrusion receiving portion 62b, the cloth support unit 40 and the main body frame 15 are centered on the axis direction da of the shaft member 13 without relying on the shaft member 13. Relative rotation. Thereby, since the load applied to the shaft member 13 can be dispersed in the engagement place of the protrusion 30b and the protrusion receiving part 62b, the durability of a baby carriage can be improved. Furthermore, by entering each of the protrusions 30b into the protrusion receiving portion 62b, for example, when the shaft member 13 is assembled before penetration, the cloth support unit 40 and the main body frame 15 can be positioned with high accuracy. However, unlike the illustrated example, a protrusion may be provided on the cloth support unit 40, and a protrusion receiving portion may be provided on the main body frame 15.

In the example shown in FIG. 13, the shaft member 13 penetrates the second link element 24, the third link element 28, and the fabric support unit 40 from the outside in the width direction in this order. In addition, the third link end member 30 of the third link element 28 is formed with a protrusion 30 b protruding inward in the width direction. The protrusion 30b protruding inward in the width direction will be looped around the circumference centered on the axis direction da of the shaft member 13. The back support member 60 of the cloth support unit 40 The lower connection portion 62 is formed with a projection receiving portion 62b that receives the projection 30b. The convex receiving portion 62b is formed by the inner surface of the concave portion that opens toward the outside in the width direction.

In addition, the front foot support element 32 connects a lower portion thereof to the front foot 20 and is rotatable relative to the front foot 20. The forefoot support element 32 is fixed to the cloth support unit 40 at an upper portion thereof. In the stroller 10 of this embodiment, the front foot support element 32 is fixed to the seat surface support element 50 of the cloth support unit 40. More specifically, each front leg support element 32 is fixedly attached to the side frame portion 52 a on the side corresponding to the seat surface support frame 51 constituting the seat surface support element 50. As shown in detail in FIG. 10, a support recess 32 a is formed on the upper end portion of the forefoot support element 32 to receive the seat surface support frame 51 of the seat surface support element 50 from above. The seat surface support frame 51 is fixedly connected to the front leg support element 32 in a state where the seat surface support frame 51 is disposed inside the support recess 32 a, for example, using a latch or the like. Therefore, the seat surface support member 50 can be supported from below by the front foot support member 32.

The forefoot support member 32 supports the elongated cloth receiving member 33. The cloth receiving member 33 is slidable relative to the front leg support member 32 along the longitudinal direction. The cloth receiving member 33 is slid relative to the front foot support member 32 and extends forward, so that the front part of the cloth 150 can be pulled up from below. For example, when the backrest support element 60 of the cloth support unit 40 falls down and the infant is sleeping on the cloth sheet 150, the cloth sheet receiving member 33 can be used to pull up the front part of the cloth sheet 150 to support the infant's foot unit.

As shown in FIG. 1, the main body frame 15 is a structure extending in the width direction. The component includes a footrest 17 extending between a pair of front feet 20, a rear connecting member 18 extending between a pair of rear feet 21, and a protective member 19 extending between a pair of first link elements 22.

<Handle 70>

The U-shaped handle 70 is swingably connected to the stroller body 11 configured as described above. The handle 70 connects both ends of the U-shape to the third link element 28 on the corresponding side so as to be rotatable (swingable). In this embodiment, as shown in FIG. 13, the handle 70 and the stroller body 11 are connected to be relatively rotatable by a shaft member 13 penetrating the stroller body 11. In particular, due to the use of the shaft member 13, the handle 70, the second link element 24, the third link element 28 of the body frame 15, and the seat surface support element 50 and the back support element 60 of the cloth support unit 40 will have the same width. The axial direction da of the shaft member 13 extending in parallel in the lateral direction is centered on the axis member da and is relatively rotatable.

In the present embodiment, the handle 70 includes a U-shaped handle body 71, handle end members 74 provided individually at both ends of the U-shape of the handle body 71, and provided adjacent to the handle end member 74 in the width direction. First switching member 75. The handle main body 71 includes a pair of handle main portions 72 a that individually attach the handle end members 74 to one of the lower ends, and a handle connection portion 72 b that extends between the upper ends of the handle main portions 72 a. The shaft member 13 passes through: the lower portion of the handle body 71 that is covered with the handle end member 74 and the first switching member 75 that is arranged side by side with the handle end member 74 in the width direction. Therefore, the handle main portion 72a, the handle end member 74, and the first switching member 75 of the handle body 71 individually form through holes 71a, 74a, and 75a through which the shaft member 13 extends and extends.

In addition, the stroller body 11 connected to the handle 70 through the shaft member 13 is provided with a third protrusion 26b provided on a circumference centered on the axial direction da of the shaft member 13 and protruding in the axial direction da. The third protrusion 26b has a convex surface (outer surface) located on the entire circumference or a part of the circumference centered on the axis direction da. The handle 70 is formed with a third projection receiving portion 75b that receives the projection surface 26b1 of the third projection 26b. The third protrusion receiving portion 75 b has a protrusion receiving surface located on the entire circumference or a part of the circumference centered on the axis direction da of the shaft member 13. When the handle 70 swings with respect to the stroller body 11, the convex surface 26b1 of the third protrusion 26b and the convex receiving surface 76b1 of the third protrusion receiving portion 75b will relatively slide. As described above, by engaging the third protrusion 26b with the third protrusion receiving portion 75b, the handle 70 can be positioned relative to the stroller body 11 without relying on the shaft member 13 and centering the axis direction da of the shaft member 13 as the center. And swing. Thereby, since the load applied to the shaft member 13 can be dispersed in the engagement place of the protrusion 26b and the protrusion receiving part 75b, the durability of a baby carriage can be improved. Furthermore, by entering each of the projections 26b into the projection receiving portion 75b, for example, when the shaft member 13 is assembled before the shaft member 13 is penetrated, the handle 70 and the stroller body 11 can be positioned with high accuracy. However, unlike the illustrated example, a protrusion may be provided on the handle 70, and a protrusion receiving portion may be provided on the stroller body 11.

As shown in the examples shown in FIGS. 13 to 15, the shaft member 13 penetrates the handle 70, the second link element 24, the third link element 28, and the fabric support unit 40 from the outside in the width direction in this order. Further, the second link end member 26 of the second link element 24 is formed with a protrusion 26 b protruding outward in the width direction. The protrusion 26b protruding outward in the width direction includes a protrusion receiving surface 26b1 located on a part of the circumference centered on the axial direction da of the shaft member 13. The other side The first switching member 75 of the handle 70 is formed with a projection receiving portion 75b that receives the projection surface 26b1 of the projection 26b. The convex receiving portion 75b includes a convex receiving surface 76b1 formed by a concave portion or an inner surface of the opening that is opened inward in the width direction. The convex receiving surface 76b1 of the convex receiving portion 75b shown in the figure will be located on a part of the circumference centered on the axis direction da of the shaft member 13. The length of the convex receiving surface 76b1 along the circumferential direction is longer than the length of the convex surface 26b1 along the circumferential direction. Therefore, when the handle 70 is swung relative to the stroller body 11, the protrusion 26b can move within the protrusion receiving portion 75b.

As shown in FIG. 14 and FIG. 15, the projection 26 b further includes a projection surface 26 b 1 located on a part of the circumference centered on the axis direction da of the shaft member 13 and two projection surfaces 26 b 1 located along the circumference. A pair of end surfaces 26b2, 26b3 on the side and not parallel to the convex surface 26b1. In the illustrated example, each of the end faces 26b2, 26b3 of the protrusion 26b is formed parallel to a radiation direction centered on the axis direction da of the shaft member 13. Similarly, the projection receiving portion 76b further includes a projection receiving surface 76b1 located on a part of the circumference centered on the axis direction da of the shaft member 13, and along both sides of the projection receiving surface 76b1, and The non-parallel pair of end surfaces 76b2 and 76b3 of the convex receiving surface 76b1. In the illustrated example, each of the end faces 26b2, 26b3 of the convex receiving portion 76b is formed parallel to a radial direction centered on the axis direction da of the shaft member 13. When the handle 70 is in the first position (rear position), one end surface 26b2 of the protrusion 26b is disposed at a position opposite to the one end surface 76b2 of the protrusion receiving portion 75b, and the handle 70 disposed in the first position is restricted. Swing back. On the other hand, when the handle 70 is in the second position (front position), the other end portion 26b3 of the protrusion 26b is disposed to receive the protrusion 26b3. The position of the opposite surface of the other end portion 76b3 of the portion 75b restricts the handle 70 disposed at the second position from further swinging forward.

The handle 70 includes a swing restricting member 73 that is slidable with respect to the handle 70 along the longitudinal direction of the handle main portion 72 a of the handle body 71. The swing restricting member 73 can be engaged with a handle fixing bolt 37 (see FIGS. 5 and 6) provided in the stroller body 11. When the handle fixing latch 37 is engaged with the swing restricting member 73, the handle 70 is locked at the second position (opposite surface pressing position) or the first position (back surface pressing position).

<< Overall action and function of baby carriage >>

Next, the overall operation and effects of the stroller 10 brought by the stroller body 11 and the handle 70 will be described. First, the stroller 10 configured as described above can be folded from the unfolded state shown in FIGS. 1 to 6 to the folded state shown in FIG. 7. In the folding operation, the constituent elements that become the stroller 10 rotate (pivot, swing) with each other around an axis extending in the width direction.

Specifically, the handle 70 disposed at the first position is temporarily pulled up and upwards, and then pushed downward, so that the third link element 28 is moved clockwise with respect to the rear leg 21 in FIG. 5. Swirl. With this operation, the first link element 22 and the seat surface support element 50 of the cloth support unit 40 are rotated clockwise in FIG. 5 with respect to the second link element 24. With this operation, the handle 70 and the front foot 20 are approached from the side view point of the stroller 10 to be disposed substantially parallel, and the position of the handle 70 is lowered. As described above, the stroller 10 can be folded to reduce the size of the stroller 10 in the front-rear direction and the up-down direction. On the other hand, to unfold the stroller 10 from the folded state, as long as the reverse operation of the folding operation described above is performed, Order. Therefore, in this stroller 10, a part of the cloth support unit 40 (specifically, a part from the side portion 51a of the side frame portion 52a of the seat surface support frame 51 to the fixed position with the front foot support element 32) The front foot support element 32 has a function as a link during the folding operation of the stroller 10 and the unfolding operation of the stroller 10.

The stroller 10 is provided with a state maintaining mechanism 35 that restricts the movement of the stroller 10 from the unfolded state to the folded state. The state maintaining mechanism 35 includes an operation restricting member 35 c that is slidable with respect to the second link element 24 along the longitudinal direction of the second link element 24. The motion restriction member 35c is given potential energy toward the third link end member 30 of the third link member 28, and engages with the engaging recessed portion 28a formed in the third link end member 30, thereby restricting the second The relative swing of the link element 24 and the third link element 28 restricts the movement from the unfolded state of the stroller 10 to the folded state. The state maintaining mechanism 35 further includes an operation member 35b that can be engaged with the motion restriction member 35c, and a remote operation device 35a that remotely operates the operation member 35b. The operation member 35b is slidable with respect to the handle main part 72a along the longitudinal direction of the handle main part 72a of the handle 70. In addition, the remote operation device 35a is provided on the handle connection portion 72b of the handle 70, and the remote operation device 35b can slide the handle main portion 72a. By using the remote operation device 35a and operating the motion restriction member 35c through the operation member 35b, the engagement between the motion restriction member 35c and the third link end member 30 can be released. That is, by operating the remote operation device 35a, the folding operation of the stroller 10 in the unfolded state can be made possible.

In the baby carriage 10 according to the above embodiment, the backrest support The holding member 60 is provided with a protrusion 62 a extending on a circumference centered on the axis direction da of the shaft member 13, and the seat surface support member 50 is formed with a protrusion receiving portion 54 a that receives the protrusion 62 a. The engagement of the convex receiving portion 54a is used to connect the backrest support member 60 to the seat surface support member 50, and the rotation center of the cloth support unit 40 with respect to the main body frame 15 is taken as a center, and the seat support member is opposed to the seat surface support member. 50 is swingable. That is, positioning is performed by engagement of the protrusion 62a and the protrusion receiving portion 54a, whereby the backrest support member 60 and the seat surface support member 50 of the cloth support unit 40 can be easily and accurately positioned at predetermined relative positions. To connect. In addition, since the engagement between the projection 62a and the projection receiving portion 54a can be used to hold the backrest support member 60 and the seat surface support member 50 in a relatively swingable state connected in a predetermined positional relationship, a shaft is used. The cloth sheet supporting unit 40 of the component 13 can be easily assembled toward the main body frame 15. In addition, the swing of the backrest support member 60 is relatively stable on the shaft member 13. Therefore, the tilting operation and the folding operation can be performed more stably. Furthermore, since the load applied to the shaft member 13 can be distributed at the engagement between the projection 62a and the projection receiving portion 54a, the durability of the stroller 10 can be improved. In particular, the above-mentioned effect becomes remarkable when the shaft member 13 penetrates a large number of members. In addition, a protrusion may be provided on the seat surface support member 50 and a protrusion receiving portion may be provided on the backrest support member 60. The same effect can also be exerted in this example.

Furthermore, in the manufacture of the stroller 10, a part or all of the cloth support unit 40 may be prepared in advance, and then the manufactured cloth support unit 40 may be mounted on the main body frame 15. According to this manufacturing method, compared with a manufacturing method of a stroller in which components are sequentially installed, the stroller 10 The production is easy, stable and efficient. However, the present invention is not limited to a method for manufacturing the stroller 10.

Further, in the stroller 10 of this embodiment, the body frame 15 is provided with a second protrusion 30b extending on a circumference centered on the axis direction da of the shaft member 13, and the cloth support unit 40 is formed to receive the second protrusion. The second protrusion receiving portion 62b of the lifter 30b. Therefore, by positioning the projection 30b and the projection receiving portion 62b with each other, the main body frame 15 and the fabric support unit 40 can be easily and accurately connected at a predetermined relative position, thereby using a shaft member. The cloth support unit 40 of 13 can be easily assembled toward the main body frame 15. Moreover, since the relative rotation of the cloth sheet supporting unit 40 and the main body frame 15 is relatively stable, the folding operation can be performed stably and smoothly. Furthermore, since the load applied to the shaft member 13 can be distributed at the engagement between the projection 30b and the projection receiving portion 62b, the durability of the stroller 10 can be improved. In addition, a protrusion may be provided on the cloth support unit 40 and a protrusion receiving portion may be provided on the main body frame 15. In this example, the same effect can also be exerted.

Furthermore, in the stroller 10 of this embodiment, the stroller body 11 is provided with a third protrusion extending on a circumference centered on the axis direction da of the shaft member 13, and the handle 70 is formed to receive the third protrusion 26b. The third raised receiving portion. Therefore, the baby carriage main body 11 and the handle 70 can be easily and accurately connected at a predetermined relative position by positioning with the engagement of the protrusion 26b and the protrusion receiving portion 75b, thereby using the shaft member 13 70 makes it easy to assemble the stroller body 11. In addition, since the relative rotation of the handle 70 and the stroller body 11 is relatively stable, the folding operation can be performed stably and smoothly. Furthermore, since the load applied to the shaft member 13 can be distributed to the protrusions The engagement between 26b and the convex receiving portion 75b can improve the durability of the stroller 10. In addition, a protrusion may be provided on the handle 70 and a protrusion receiving portion may be provided on the stroller body 11. In this example, the same effect can also be exerted.

<< Wheel Holding Unit 100 >>

Next, the wheel holding unit 100 will be described mainly with reference to FIGS. 22 to 27. As described above, the wheel holding unit 100 mounted on the front foot 20 and the rear foot 21 is configured as a so-called caster. The body 110 is supported as a rotatable fixed body 105. In addition, the stroller 10 is provided with a switching mechanism 88 that can automatically switch the state in which the rotating body 110 of the wheel holding unit 100 is rotatable relative to the fixed body 105 according to the position of the handle 70. The switching mechanism 88 will be described later, and the wheel holding unit 100 will be described in detail here.

The pair of front feet 20 may be mounted with a wheel holding unit 100 configured to be the same or left-right symmetrical. In addition, the pair of rear feet 21 may be mounted with the wheel holding units 100 configured to be the same or symmetrical. Furthermore, the front foot 20 and the rear foot 21 may be mounted with a configuration in which only the mounting portion of the foot is different, and the other substantially the same wheel holding unit 100 is configured. Therefore, here is an example of a wheel holding unit 100 configured as a caster.

As shown in FIGS. 22 and 23, the wheel holding unit 100 includes a rotating body 110 that holds the wheel 101 through a shaft 113 and a fixed body 105 that supports the rotating body 110 so as to be rotatable. The fixing body 105 is fixed to the front leg 20 or the rear leg 21. The rotation axis Ar of the wheel 101 coincides with the axis direction of the axle 113 and extends in the horizontal direction. In this embodiment, the solid The fixed body 105 will support the support shaft member 108, and the rotating body 110 will be supported by the support shaft member 108 suspended from the fixed body 105, and can be rotated relative to the fixed body 105 about the axis direction of the support shaft member 108 as the center.

As shown in FIGS. 22 and 23, the rotating body 110 includes a wheel holder 120 that supports the wheel 101 to be rotatable, a support block 115 that supports the wheel holder 120 to be operable, and is disposed on the support block 115 and The first elastic structure 125 and the second elastic structure 127 between the wheel retainers 120. The wheel holder 120 holds the axle 113 and holds the wheels 101 on both sides of the axle 113. In addition, in FIG. 23, illustration of wheels is omitted, and in FIG. 22, illustration of wheels on one side is omitted. In the present embodiment, the wheel holder 120 is mounted on the support block 115 through the swing shaft member 111, and is swingable with respect to the support block 115 in the axis direction sc2 of the swing shaft member 111. In the examples shown in FIGS. 22 and 23, the rotating body 110 further includes a brake member 129 that is attached to the wheel holder 120 so as to be able to swing. The brake member 129 has a brake protrusion 129 a protruding in a direction parallel to the rotation axis Ar. When the brake member 129 swings relative to the wheel holder 120, the brake protrusion 129a can be engaged with the wheel 101, and in this state, the rotation of the wheel 101 centered on the rotation axis Ar can be restricted.

The first elastic structure 125 and the second elastic structure 127 are deformed by the movement of the wheel holder 120 with respect to the support block 115. In other words, the first elastic structural body 125 and the second elastic structural body 127 are deformed to absorb the motion of the support block 115 with respect to the wheel holder 120 to exert the shock-absorbing function. Here, the term "elastic structure" means a structure that deforms when it receives an external force and at least partially when the external force is removed. The structure is restored to its original shape. Therefore, it is not only a block made of pure elastic material such as rubber or resin, but it can also be included in the structure that exhibits the above-mentioned properties, such as a spring or a sealed gas bag as described below. Elastic construct. In the wheel holding unit 100 including two elastic structures 125 and 127, at least one of the following condition a and condition b should be satisfied from the viewpoint of excellent suspension performance. The following conditions a and b can be configured by different materials, structures, arrangements, and deformation amounts between the first elastic structure 125 and the second elastic structure 127. The second elastic structure 127 is realized.

Condition a:

When the movement of the wheel retainer 120 relative to the support block 115 is started, first, only the first elastic structure 125 is pressed between the wheel retainer 120 and the support block 115 and deformed. When the operation of the support block 115 progresses, in addition to the first elastic structure 125, the second elastic structure 127 is pressurized and deformed between the wheel holder 120 and the support block 115.

Condition b:

If only the first elastic structure 125 is arranged between the wheel retainer 120 and the support block 115, it is necessary to deform the first elastic structure 125 to move the wheel retainer 120 relative to the support block 115 by a predetermined amount. The magnitude of the force is the same as when only the second elastic structure 127 is arranged between the wheel retainer 120 and the support block 115, the second elastic structure 127 is deformed and the wheel retainer 120 is opposed to the support block 115. The amount of force required to move a predetermined amount varies.

In condition a, when the wheel retainer 120 and the support block 115 are moved relative to each other, at the initial stage of the relative movement, only the first elastic structure 125 is deformed, and only the first elastic structure 125 opposes the wheel holder 120 and the support block 115 Relative action. On the other hand, when the relative movement of the wheel retainer 120 and the support block 115 is performed, the second elastic structure 127 starts to deform, and the second elastic structure 127 opposes the opposition of the wheel retainer 120 and the support block 115. action. For example, in the initial stage of the relative movement of the wheel retainer 120 and the support block 115, the second elastic structure 127 and the at least one of the wheel retainer 120 and the support block 115 may be non-contact. When the relative operation with the support block 115 is performed, the second elastic structure 127 is in contact with both the wheel holder 120 and the support block 115. When the second elastic structure 127 opposes the relative movement of the wheel retainer 120 and the support block 115, the first elastic structure 125 also continues to deform as the wheel retainer 120 and the support block 115 move. The 2 elastic structure 127 and the first elastic structure 125 together oppose the relative movement of the wheel retainer 120 and the support block 115, or the first elastic structure 125 may no longer oppose the wheel retainer 120 and the support block Relative action of 115.

In condition b, it is set that the resistance of the first elastic structure 125 against the relative movement when the wheel retainer 120 and the support block 115 only move relative to each other by a predetermined amount, and the relative movement of the wheel retainer 120 and the support block 115 are the same. When measuring, the resistance of the second elastic structure 127 against the relative movement is different.

Next, the configuration of the elastic structures 125 and 127 of this embodiment shown and the supporting structure of the elastic structures 125 and 127 are shown. The configuration of the related rotating body 110 will be described. In the present embodiment, the first elastic structure 125 is configured using an elastic body 126 itself such as rubber. The illustrated elastic body 126 has a receiving portion 126a formed as a recessed portion. The wheel retainer 120 has a support protrusion 121a fitted into the receiving portion 126a. By engaging the support protrusion 121 a and the receiving portion 126 a, the first elastic structure 125 constituted by the elastic body 126 can be held by the wheel holder 120. The elastic body 126 is formed in a substantially cylindrical shape, and its longitudinal direction is arranged to extend between the wheel holder 120 and the support block 115. When the wheel retainer 120 swings with respect to the support block 115, the elastic body 126 is compressed along the longitudinal direction thereof. Therefore, the resistance of the first elastic structure 125 to the relative swing of the wheel retainer 120 and the support block 115 is substantially fixed without being affected by the relative swing of the wheel retainer 120 and the support block 115.

Next, the configurations of the second elastic structure 127 and the rotating body 110 supporting the second elastic structure 127 will be described. As shown in FIGS. 22 and 23, the support block 115 of the rotating body 110 includes a plate-shaped support plate portion 116 extending in the vertical direction. On the other hand, the wheel retainer 120 of the rotating body 110 includes a retainer base 121 pivotally connected to the support block 115 and an upper extension 122 extending upward and upward from the rear of the retainer base 121. As shown in FIG. 23, the upper extension portion 122 is disposed at a position facing the support plate portion 116 of the support block 115. The axle 113 used to hold the wheel 101 is held near the connection between the holder base 121 and the upper extension 122 in the wheel holder 120. The braking member 129 is pivotally connected to the upper extending portion 122.

In this embodiment, the second elastic structure 127 serves as a seal. Formed by a bag of gas. The material used as the bag may be made of rubber or resin having stretchability. In the illustrated example, the second elastic structure 127 is formed as a resin bag 128 that seals the gas. The resin bag 128 is transparent or translucent. The resin bag 128 is supported by the support plate portion 116 of the support block 115 through a fastener (not shown). As shown in FIG. 24, the resin bag 128 is roughly formed into a cube shape, and has a recessed portion 128a, a stepped portion 128b, and a fastener receiving portion 128c.

The recessed portion 128 a is formed on a surface on the side opposite to the surface above the extended portion 122 of the wheel holder 120. The recessed portion 128 a extends linearly in a direction orthogonal to the swing axis sc2 of the wheel holder 120 relative to the support block 115. A convex portion 123 is formed on the upper extending portion 122 at a position facing the concave portion 128a. The convex portion 123 extends linearly in a direction orthogonal to the swing axis sc2 of the wheel holder 120 with respect to the support block 115, and abuts the concave portion 128 a when the wheel holder 120 moves toward the support block 115.

The step portion 128 b is provided below a surface on the side opposite to the surface of the support plate portion 116. The step portion 128b extends linearly in a direction parallel to the swing axis sc2. Further, the support plate portion 116 forms a step portion 117 at a position facing the step portion 128b. On the other hand, the fastener receiving portion 128 c forms a space in which a fastener (not shown) for fixing the resin bag 128 to the supporting plate portion 116 is formed. The space in the fastener receiving portion 128c forms a step for receiving a fastener head made of a screw or the like.

Next, operations and effects of the wheel holding unit 100 of the present embodiment configured as described above will be described.

First, the wheel holding unit 100 of this embodiment is relatively A first elastic structure 125 and a second elastic structure 127 which are deformed by the relative movement of the wheel holder 120 to the support block 115 are provided between the moving support block 115 and the wheel holder 120. The first elastic structure 125 and the second elastic structure 127 preferably satisfy the condition a, that is, when the operation of the wheel holder 120 with respect to the support block 115 starts, first, only the first elastic structure 125 is on the wheel. The retainer 120 and the support block 115 are deformed by being pressurized. When the movement of the wheel retainer 120 with respect to the support block 115 progresses, in addition to the first elastic structure 125, the second elastic structure 127 also It is pressurized and deformed between the wheel holder 120 and the support block 115. In the above-mentioned baby carriage 10, when the moving load on the baby carriage 10 is small, for example, when the infants and young children who ride the baby carriage are younger and their luggage is not placed in the basket 90, the first elastic structure 127 is effective. The ground absorbs vibration or shock when walking, and can play an excellent shock-absorbing function. On the other hand, when the moving load on the stroller 10 is large, for example, when the infants and young children who ride the stroller 10 are older and have heavy luggage in the basket 90, the first elastic structure 125 is used. The second elastic structure 127 which is different, or using both the first elastic structure 125 and the second elastic structure 127, can stably support the load and effectively absorb vibration or shock during walking, and can exhibit excellent performance. Suspension function. That is, it is possible to impart excellent riding comfort to the stroller 10 without being affected by the magnitude of the moving load on the stroller 10.

In addition, the first elastic structure 125 and the second elastic structure 127 should satisfy the above condition b. That is, if only the first elastic structure 125 is arranged between the wheel retainer 120 and the support block 115, the first elastic structure is made. Deformation of the body 125 required for the wheel retainer 120 to move a predetermined amount relative to the support block 115 The magnitude of the required force is the same as when only the second elastic structure 127 is arranged between the wheel retainer 120 and the support block 115, the second elastic structure 127 is deformed and the wheel retainer 120 is opposed to the support block. There are 115 different strengths required to move the same amount. That is, the resistance of the first elastic structure 125 to the relative movement of the wheel retainer 120 and the support block 115 and the resistance of the second elastic structure 127 to the relative movement of the wheel retainer 120 and the support block 115 are preferable. different. In the aforementioned stroller 10, between the first elastic structure 125 and the second elastic structure 127, the first elastic structure 125 and the second elastic structure 125 are appropriately designed with different materials, structures, arrangements, and amounts of deformation. The elastic structure 127 can provide a desired shock-absorbing function to the wheel holding unit 100 with a high degree of design freedom.

Furthermore, the first elastic structure 125 and the second elastic structure 127 may satisfy both of the conditions a and b described above. As an example, the resistance of the first elastic structure 125 to the relative movement of the wheel retainer 120 and the support block 115 becomes greater than the resistance of the second elastic structure 127 to the relative movement of the wheel retainer 120 and the support block 115. When the moving load of the stroller 10 is small, the load can be stably supported by the first elastic structure 125, and the vibration or shock during walking can be effectively absorbed by the first elastic structure 125. When the moving load of the stroller 10 is large, the first elastic structure 125 or the first elastic structure 125 and the second elastic structure 127 can be used to support the load more stably and effectively. Ground to absorb vibration or shock when walking. Therefore, the influence on the magnitude of the moving load of the stroller 10 can be eliminated very effectively, and excellent riding comfort can be imparted to the stroller 10.

Moreover, in the said embodiment, the 2nd elastic structure 127 was comprised as the gas-tight bag 128. The above-mentioned second elastic structure 127 may also adjust the resistance of the second elastic structure 127 by adjusting the shape of the bag 128 or the filling amount of the gas, and in particular, the resistance changes as the change proceeds. Thereby, a high degree of design freedom can be used to impart a desired shock-absorbing function to the wheel holding unit.

Furthermore, in the above-mentioned embodiment, the pocket 128 serving as the second elastic structure 127 is formed with a recessed portion 128 a extending linearly. In addition, one of the wheel retainer 120 and the support block 115 supports the pocket 128 in such a way that the recess 128 a and the swing axis sc2 of the wheel retainer 120 relative to the support block 115 extend orthogonally, and the wheel retainer 120 and the support block 115 The other side of the body 115 includes a convex portion 123 that will be located in the concave portion 128 a when the wheel retainer 120 and the support block 115 are relatively moved. The second elastic structure 127 is a gas-sealed bag 128 and can be deformed in various directions. However, the second elastic structure 127 is deformable with the wheel retainer 120 and the support by engaging the concave portion 128a and the convex portion 123. The other side of the block 115 maintains a predetermined positional relationship, and the bag 128 undergoes a predetermined deformation. This will ensure the desired shock absorption effect. Before the operation of the wheel retainer 120 with respect to the support block 115 is started, even if the second elastic structure 127 that is deformable and the other of the wheel retainer 120 and the support block 115 are non-contact and deformable second elasticity The structure body 127 is not directly connected to the other of the wheel retainer and the support block, and the second elastic structure body 127 and the wheel retainer 120 and the deformable second elastic structure 127 can also be engaged with each other by engaging the concave portion 128a with the convex portion 123. The other side of the support block 115 is maintained at a predetermined position, and a desired shock-absorbing effect can be securely secured.

Furthermore, in the above-mentioned embodiment, the engagement of the step portion 128b and the segment portion 117 can limit the shift of the bag 128 on the support plate portion 116 of the support block 115, and can also suppress the unexpected direction The resin bag 128 is deformed. Thereby, the second elastic structure 127 constituted by the bag 128 can exhibit a desired shock-absorbing effect. Furthermore, in the above-mentioned embodiment, the bag receiving portion 128c having the stepped (flange) portion is formed in the bag 128 serving as the second elastic structure 127. By using the fastener receiving portion 128c, the bag 128 can be kept in a direction that is not easily deformed. As a result, when the relative movement of the wheel holder 120 and the support block 115 is performed, the deformation of the bag 128 is substantially fixed, and the expected performance is shown. Scheduled suspension.

In the case where the second elastic structure 127 is configured as the gas-sealed bag 128, when the wheel retainer 120 operates on the support block 110, one of the wheel retainer 120 and the support block 110 should be formed from the bag. The corners of 128 begin to contact the bag 128. The second elastic structure 127 formed by the gas-sealed bag 128 shows the excellent resistance of the corner portion of the bag 128 to deformation. On the other hand, after the corner portion begins to deform, it can be softly deformed and sensitively absorb the wheel retention The motion of the device 120 relative to the support block 110. Therefore, the second elastic structure 127 can stably support the moving load expected for the stroller 10, and further, the second elastic structure 127 supporting the moving load can exhibit a shock-absorbing function that effectively absorbs shock or vibration.

In addition, the elastic structures 125 and 127 are not limited to the case of sealing the gas bag 128, and the resistance of the elastic structures 125 and 127 to the relative movements of the wheel retainer 120 and the support block 115 to the elastic structure 125 can be made. After the deformation of 127 starts, it is not fixed but will change. Even on In the example, by appropriately setting the resistance of the elastic structure bodies 125 and 127 to the relative movement of the wheel retainer 120 and the support block 115, the baby carriage 10 can be imparted to it without being affected by the moving load of the baby carriage 10. Excellent ride comfort.

Furthermore, when at least one of the elastic structures 125 and 127 is exposed, a shock-absorbing function can be visually associated with it, and the protector of the infant can be given peace of mind. Particularly, the second elastic structure 127 formed by the gas-sealed bag 128 can strongly associate with the shock-absorbing function, and particularly when the bag 128 is transparent or translucent, it can strongly associate with the shock-absorbing function.

However, in the present embodiment, the wheel holding unit 100 is configured as a caster, and the rotating body 110 is rotatable relative to the fixed body 105, but it is not limited to this. Even if the wheel holding unit is capable of relatively rotating the rotating body 110 and the fixed body 105, that is, the wheel 101 cannot be rotated, it can be applied to the first switching member 75 and the second switching member 80, and the first switching member 75 and the second switching member 75 and The above-mentioned operational effects provided by the second switching member 80. In this embodiment, an example in which the wheel holding unit 100 includes both the first switching member 75 and the second switching member 80 is shown, but the invention is not limited thereto. The wheel holding unit 100 may include only the second switching member 80, and in this example, the above-mentioned effect provided by only the second switching member 80 can be obtained.

<< Switching mechanism >>

Next, the switching mechanism 88 will be described.

<Overall Structure of Switching Mechanism>

As described above, the switching mechanism 88 automatically switches the rotating body 110 of the wheel holding unit 100 with respect to the fixed body 105 in accordance with the position of the handle 70. Rotating state and non-rotating state mechanism. In particular, in this embodiment, both the front foot 20 and the rear foot 21 are provided with a wheel holding unit 100 configured as a caster, and the switching mechanism 88 will install the wheel holding unit on the foot on the front side in the forward direction according to the position of the handle 70. It is possible to rotate the rotating body 110 of 100 with respect to the fixed body 105 about the caster axis Ac as the center, and restrict the rotating body 110 of the wheel holding unit 100 mounted on the foot on the rear side in the progress direction from the fixed body 105. Rotation around the caster axis Ac. More specifically, the switching mechanism 88 causes the rotating body 110 of the wheel holding unit 100 attached to the front foot 20 to be in a state where the handle 70 is disposed at the first position (rear pressing position) shown in FIGS. 1, 3, and 5. The rotation with respect to the fixed body 105 is possible, and the rotation of the rotating body 110 of the wheel holding unit 100 mounted on the rear leg 21 with respect to the fixed body 105 is restricted. On the other hand, the switching mechanism 88 restricts the rotating body 110 of the wheel holding unit 100 attached to the front foot 20 in a state where the handle 70 is disposed at the second position (opposite surface pressing position) shown in FIGS. 2, 4, and 6. The rotation with respect to the fixed body 105 and the rotation of the rotating body 110 of the wheel holding unit 100 mounted on the rear leg 21 with respect to the fixed body 105 are possible.

The switching mechanism 88 includes a first switching member 75 provided on the handle 70 and operable as the handle 70 swings, a second switching member 80 supported on the rear foot 21 and operable as the first switching member 75 operates, A lock member 130 provided in the wheel holding unit 100 and a transmission device 87 that transmits the operation of the second switching member 80 to the lock member 130.

Among them, as described above, the first switching member 75 constitutes a part of the handle 70. Therefore, the first switching member 75 swings on the handle 70 as shown in FIG. 1 and FIG. 3. When the first position shown in FIG. 5 is between the second position shown in FIG. 2, FIG. 4, and FIG. 6, the movement is performed with the swing axis of the handle 70 as the center, that is, a rotational movement or a winding movement is performed. However, in this embodiment, the swing axis da of the handle 70 coincides with the axis direction da of the shaft member 13 which supports the handle 70 so as to be swingable. In this embodiment, as shown in FIGS. 11 to 14, since the shaft member 13 also penetrates the first switching member 75, the first switching member 75 rotates with the swing of the handle 70 and rotates around the swing axis da of the handle 70. move. The second switching member 80 is disposed above the first switching member 75 behind the foot 21. The second switching member 80 is slidable on the rear leg 21.

The first switching member 75 includes a cam contact surface 76 that comes into contact with the second switching member 80 when the handle 70 swings. On the other hand, the second switching member 80 includes a cam receiving piece 81 that receives the cam contact surface 76. In this embodiment, not only gravity, but the potential energy imparting member 85 is built in, for example, the rear leg 21 (see FIG. 19), and the second switching member 80 is directed downward along the rear leg 21 through the relay member 83 described later to impart potential energy. . By using the potential energy from the potential energy imparting member 85, the cam receiving piece 81 of the second switching member 80 and the cam abutting surface 76 of the first switching member 75 can be maintained in a contact state. Moreover, in this embodiment, as the handle 70 swings, the position of the cam contact surface 76 that abuts against the cam receiving piece 81 changes, thereby counteracting the potential imparting ability of the potential imparting member 85, and the second switching member 80 It slides on the hind feet 21.

As shown in FIGS. 17 to 19, in this embodiment, as the handle 70 moves from the first position to the second position, the portion of the cam contact surface 76 that abuts against the cam receiving piece 81 is under the side view of the stroller 10. Will gradually separate from the swing axis da. Therefore, when the handle 70 is swung from the first position to the second position, the first The 2 switching member 80 slides on the rear leg 21 while facing upward. Conversely, when the handle 70 is swung from the second position to the first position, the second switching member 80 slides on the rear leg 21 downward.

In addition, the cam abutting surface 76 of the first switching member 75 and the cam receiving piece 81 of the second switching member 80 are designed mainly to miniaturize the first switching member 75. The cam contact surface 76 of the first switching member 75 and the cam receiving piece 81 of the second switching member 80 will be described in detail later.

A lock member 130 that operates in accordance with the sliding of the second switching member 80 is provided in the wheel holding unit 100. As described above, the wheel holding unit 100 includes a wheel 101, a rotating body rotating body 110 supporting the wheel 101 to be rotatable, and a rotating body mounted on at least one of the front foot 20 and the rear foot 21 with the caster axis Ac as a center. 110 is supported as a rotatable fixed body 105. Further, as shown in FIGS. 25 and 26, the locking member 130 can be moved to a locked position of FIG. 26 that restricts the rotation of the rotating body 110 relative to the fixed body 105, and FIG. 25 that allows the rotating body 110 to rotate relative to the fixed body 105. Between the unlocked position. Therefore, the switching mechanism 88 of this embodiment moves the lock member 130 from the lock release position to the lock position or from the lock position to the lock release position according to the swing of the handle 70 relative to the stroller body 11.

In addition, the lock member 130 is designed to stabilize its operation. The structure of the lock member 130 and the wheel holding unit 100 holding the lock member 130 will be described in detail later.

Next, the transmission device 87 will be described. The transmission device 87 is provided between the second switching member 80 and the wheel holding unit 100, and is configured to direct the sliding action of the second switching member 80 toward the locking member 130 of the wheel holding unit 100. By doing so, the lock member 130 is moved between the locked position and the unlocked position. In this embodiment, a relay member 83 is provided in the rear leg 21. The relay member 83 is connected to the second switching member 80 and moves up and down in the rear foot 21 in synchronization with the sliding of the second switching member 80 relative to the rear foot 21. The transmission device 87 includes a wire 87b with one end attached to the relay member 83 and the other end attached to the lock member 130, and a cylindrical member 87a extending through the wire 87b and extending through the inside. As shown in FIG. 19, one end of the cylindrical member 87 a is held at a holding portion 84 near the relay member 83 provided in the rear leg 21. As shown in FIGS. 25 and 26, the other end of the cylindrical member 87 a is held. The holding portion 107 is provided at a position near the lock member 130 of the wheel holding unit 100. As a result, when the second switching member 80 slides relative to the rear leg 21, the wire 87b moves inside the cylindrical member 87a, and the lock member 130 connected to the other end of the wire 87b moves with the movement of the wire 87b.

In this embodiment, as described above, the front foot 20 and the rear foot 21 are each provided with a wheel holding unit 100 having a function as a caster. Therefore, as shown in FIG. 5, a transmission device 87 is provided between the relay member 83 and the wheel holding unit 100 for the front foot, and another transmission is provided between the relay member 83 and the wheel holding unit 100 for the rear foot. Device 87. As described above, the baby carriage 10 according to the present embodiment is configured to be bilaterally symmetrical about a surface extending substantially in the center of the width direction toward the front-rear direction. Therefore, the first switching member 75, the second switching member 80, and the relay member 83 of the switching mechanism 88, the front foot transmission device 87, the front foot wheel holding unit 100, the rear foot transmission device 87, and the rear foot transmission device. Both the wheel holding units 100 are provided on the left and right sides.

<The cam contact surface of the first switching member and the cam receiving piece of the second switching member>

Here, referring mainly to FIGS. 16 to 21, the cam contact surface 76 of the first switching member 75 and the cam receiving piece 81 of the second switching member 80 will be further described in detail.

As described above, with the swing of the handle 70, the position of the cam abutting surface 76 that abuts against the cam receiving piece 81 changes, whereby the second switch that is pressed toward the first switching member 75 by the potential applying member 85 is used. The component 80 slides on the rear foot 21. As shown in FIGS. 17 to 19, in this embodiment, as the handle 70 moves from the first position to the second position, the portion of the cam contact surface 76 that abuts against the cam receiving piece 81 is under the side view of the stroller 10. Will gradually separate from the swing axis da. Therefore, when the handle 70 is swung from the first position to the second position, the second switching member 80 slides on the rear leg 21 upward. Conversely, when the handle 70 is swung from the second position to the first position, the second switching member 80 slides on the rear foot 21 downward.

Further, in this embodiment, the position of the cam receiving piece 81 that contacts the cam abutting surface 76 also changes as the handle 70 swings. As shown in FIGS. 17 to 21, when the handle 70 is swung in a certain direction relative to the stroller body 11, the position of the cam receiving piece 81 that is in contact with the cam contact surface 76 is upstream from the movement path of the cam contact surface 76. Side to side. That is, the position of the cam receiving piece 81 that is in contact with the cam abutting surface 76 moves in the same certain direction as the cam abutting surface 76 that moves together with the handle 70. According to the present embodiment described above, as shown in FIG. 17, the cam contact surface 76 of the first switching member 75 can be arranged in a state where the handle 70 is disposed at the first position. It is placed at a position facing only a part of the part of the cam receiving piece 81 of the second switching member 80 that comes in contact with the handle 70 from the first position to the second position, and, as shown in FIG. 21, When the handle 70 is disposed in the second position, the cam abutting surface 76 can be disposed on a portion facing the cam receiving piece 81 that is in contact with the cam receiving piece 81 during the swing of the handle 70 from the first position to the second position. s position.

That is, when the position of the cam receiving piece 81 that is in contact with the cam abutting surface 76 is not changed, for example, if the first switching member 75 has a portion shown by a two-dot chain line in FIG. 21, the first switching member 75 needs to be The cam contact surface 76 is made longer. Therefore, according to this embodiment, the first switching member 75 of the switching mechanism 88 which is easily complicated can be reduced in size and weight, and as a result, the size and weight of the stroller 10 can be reduced. In particular, a structure related to the folding operation of the stroller 10 or the tilting operation of the fabric support unit 40 and the fabric 150 is arranged near the swing axis da of the handle 70, and there is less space in the space. Actually, as shown in FIG. 12, an operation member 35 b of the state maintaining mechanism 35 is provided directly behind the first switching member 75. In the example shown in the figure, interference with the operation member 35b occurs, and therefore, an extension portion indicated by a two-dot chain line in FIG. 21 cannot be provided substantially. That is, the configuration of the cam abutting surface 76 and the cam receiving piece 81 of this embodiment is not only small and lightweight of the stroller 10, but also improves the overall design freedom of the stroller 10.

As a specific example of the above configuration, the cam receiving piece 81 of the second switching member 80 is a usable surface similar to the cam contact surface 76, and more specifically, is configured by a curved surface, a flat surface, a folded surface, or the like. On the other hand, as shown in the illustrated example, the cam receiving piece 81 of the second switching member 80 may also have: At least two cam receiving protrusions 82 a and 82 b protruding from the cam contact surface 76 of the first switching member 75. The cam receiving protrusions 82 a and 82 b are arranged at positions separated along the moving path of the cam abutting surface 76 with the swing of the handle 70, and the cam receiving protrusions that are in contact with the cam abutting surface 76 according to the swinging position of the handle 70. The sections 82a, 82b can be changed. The design and manufacture of the cam receiving piece 81 having the cam receiving protrusions 82a and 82b is not the whole of the cam receiving piece 81, but high accuracy is required only at the positions of the cam receiving protrusions 82a and 82b. Therefore, the cam receiving piece 81 can be easily manufactured.

In the illustrated example, the cam receiving projections 82 a and 82 b are formed by a single cam receiving piece 81 extending in a linear shape, but the cam receiving projections 82 a and 82 b may be provided separately.

When the handle 70 is disposed at a position between the first position and the second position, the cam abutting surface 76 and the two cam receiving protrusions 82a, adjacent to each other along the moving path of the cam abutting surface 76, are preferably used. 82b contacts simultaneously. As described above, in this embodiment, the second switching member 80 applies potential energy toward the first switching member 75 by using the potential imparting member 85. On the other hand, the cam receiving protrusions 82 a and 82 b of the cam receiving piece 81 that are in contact with the cam abutting surface 76 change as the cam abutting surface 76 that moves with the handle 70 moves in a certain direction. Therefore, when the cam contact surface 76 is provided to simultaneously contact two adjacent cam receiving projections 82a and 82b, the cam receiving projections 82a and 82b in contact with the cam contact surface 76 may be changed when the cam receiving projections 82a and 82b are in contact with each other. A situation where the first switching member 75 and the second switching member 80 collide due to the potential energy supplying member 85 is avoided. Also, the handle 70 faces in a swingable range. When swinging in one direction and swinging in the other direction, that is, when the handle 70 is moved from the first position to the second position and when the handle 70 is moved from the second position to the first position, the cam receiving protrusions 82a and 82b do not come into contact with the cam. The impact caused by the collision of the surface 76, or the cam receiving protrusions 82a, 82b contacting the end portions 76a, 76b of the cam abutting surface 76 and overcoming the impact, can ensure the smooth swinging motion of the handle 70.

In particular, in the illustrated embodiment, the cam receiving piece 81 of the second switching member 80 includes two cam receiving projections 82a and 82b, and the two cam receiving projections 82a and 82b are formed from the handle 70 When the first position is moved toward the second position, the first cam receiving projection 82a located on the upstream side of the movement path of the cam contact surface 76 and the second cam receiving projection 82b located on the downstream side. In addition, in a state where the handle 70 shown in FIG. 17 is disposed at the first position, the cam abutting surface 76 is only the first cam receiving protrusion among the first cam receiving protrusion 82a and the second cam receiving protrusion 82b. 82a is opposed to and is in contact with the first cam receiving protrusion 82a. In the state where the handle 70 shown in FIG. 21 is disposed at the second position, the cam abutting surface 76 is only the second cam receiving protrusion among the first cam receiving protrusion 82a and the second cam receiving protrusion 82b. 82b is opposed to and is in contact with the second cam receiving protrusion 82b. According to the present embodiment described above, since the position of the cam receiving piece 81 in contact with the cam contact surface 76 changes according to the movement of the cam contact surface 76, the length of the cam contact surface 76 can be shortened. That is, the first switching member 75 of the switching mechanism 88 which is easily complicated can be reduced in size and weight, and as a result, the size and weight of the stroller 10 can be reduced. In short, as described above, the configuration of the cam abutting surface 76 and the cam receiving piece 81 of this embodiment can make the baby carriage 10 complete. Increased body design freedom.

Furthermore, according to this embodiment, when the handle 70 is disposed in the first intermediate position shown in FIG. 18 between the first position in FIG. 17 and the second position in FIG. 21, the cam contact surface 76 receives the first cam. The two opposing surfaces of the protruding portion 82a and the second cam receiving protruding portion 86b are in contact with only the first cam receiving protruding portion 82a. On the other hand, when the handle is disposed at the second intermediate position shown in FIG. 20 between the first intermediate position in FIG. 18 and the second intermediate position in FIG. 21, the cam abutting surface 76 and the first cam receiving protrusion 82 a The two opposing surfaces of the second cam receiving protrusion 82b and the second cam receiving protrusion 82b are in contact with only the second cam receiving protrusion 82b. According to the present embodiment described above, a time point at which the cam abutting surface 76 and two adjacent cam receiving projections 82a and 82b are simultaneously contacted can be provided. That is, when the handle 70 is disposed at the position shown in FIG. 19 between the first intermediate position in FIG. 18 and the second intermediate position in FIG. 20, the cam contact surface 76 may be in contact with the first cam receiving projection 82 a and the second Both sides of the cam receiving protrusion 82b are in contact. According to the present embodiment, as described above, when the cam receiving projections 82 a and 82 b that are in contact with the cam contact surface 76 are changed, the impact caused by the collision of the cam receiving projections 82 a and 82 b to the cam contact surface 76 does not occur. Or, the cam receiving protrusions 82 a and 82 b are in contact with the end portions 76 a and 76 b of the cam abutting surface 76 and pass through the impact, which can ensure the smooth swinging motion of the handle 70.

In order to realize the cam contact surface 76 and the cam receiving piece 81 as described above, in this embodiment, when viewed along the swing axis da of the handle 70 relative to the stroller body 11, the handle 70 is relative to the stroller body 11. The linear distance La of the swing axis da to each position of the cam abutting surface 76 will abut the cam on the front side in the moving direction when the handle 70 swings from the first position to the second position. When the one end 76a of the surface 76 faces the cam abutting side on the rear side in the moving direction, the other end 76b gradually becomes longer, and when the handle 70 is disposed toward the second position shown in FIG. 21, the handle 70 faces the stroller body. The straight line distance Lb from the swing axis da of 11 to the second cam receiving protrusion 82b is shorter than the straight line distance Lc from the swing axis da of the handle 70 with respect to the stroller body 11 to the first cam receiving protrusion 82a.

Furthermore, in this embodiment, when viewed along the swing axis da of the handle 70 relative to the stroller body 11, the linear distance La from each position of the swing axis da of the handle 70 relative to the stroller body 11 to each position of the cam contact surface 71 One end 76a of the cam abutting surface 76 on the forward side when the handle 70 is swung from one side to the other side of the swingable range gradually changes toward the other end 76b of the cam abutting surface on the rear side in the moving direction. As shown in FIG. 16, the width w of the cam abutting surface 76 along the direction parallel to the swing axis da of the handle 70 is from one end 76 a of the cam abutting surface 76 to the cam abutting on the rear side in the moving direction. The other end 76b on the interface 76 gradually widens. According to the above-mentioned embodiment, the width w of the cam contact surface 76 is widened at a position on the cam contact surface 76 where the straight distance La of the swing axis da of the handle 70 from the side view becomes longer. When the linear distance La from the swing axis da of the handle 70 to a position on the cam abutting surface 76 becomes longer, when the position of the cam abutting surface 76 abuts against the cam receiving piece 81, the cam receiving piece comes from The potential imparting ability of the potential imparting member 85 imparted to the cam abutting surface 76 toward 81 becomes larger. In addition, since the width a of the cam abutment surface 76 at a longer distance from the swing axis da of the handle 70 to the straight line La is wider, it is possible to abut a larger potential-imparting ability from the potential-imparting member 85 with a cam. The wider portion of the surface 76 is received. That is, the size of the first switching member 75 and the stroller 10 can be reduced in size without reducing the size of the cam contact surface 76 more than necessary. In addition, the relative movement of the first switching member 75 and the second switching member 80 with the swing of the handle 70 can be made smoother.

<Locking member and wheel holding unit>

Next, referring mainly to FIG. 25 to FIG. 27, a portion related to the lock member 130 among the shaft member 130 and the wheel holding unit 100 will be described.

As described above, the lock member 130 can be moved between the lock position of FIG. 26 that restricts the rotation of the rotating body 110 relative to the fixed body 105 and the lock release position of FIG. 25 that restricts the rotation of the rotating body 110 relative to the fixed body 105. As shown in FIG. 25 and FIG. 26, the fixed body 105 is formed with a receiving portion 106 that extends in one direction and is opened in one of the aforementioned directions on the side opposite to the rotating body 105. In the present embodiment, the accommodating portion 106 extends in the up-down direction and opens downward in the up-down direction. On the other hand, the supporting block 115 of the rotating body 110 is formed with an engaging recessed portion 114 at a position that can face the receiving portion 106 of the fixed body 105 in one direction.

The locking member 130 is arranged in the receiving portion 106 with its long side direction along one direction, and is slidable in the receiving portion 106. A position where the lock member 130 moves to the other side in one direction in the accommodation portion 106 is the lock release position shown in FIG. 25, and the lock member 130 is located in the accommodation portion 106 of the fixed body 105 across the entire length in the lock release position. Therefore, when the lock member 130 is in the unlocked position, the lock member 130 does not restrict the rotation of the rotating body 110 relative to the fixed body 105. On the other hand, the position where the lock member 130 moves to one side in one direction in the accommodation portion 106 is the lock shown in FIG. 26. Position, the locking member 130 is in the locked position, and one end of the locking member 130 extends outward from the receiving portion 106. At this time, one end of the locking member 130 will extend into the engaging recess 114 of the rotating body 110. Therefore, when the locking member 130 is in the locked position, the locking member 130 restricts the rotation of the rotating body 110 relative to the fixed body 105.

As shown in FIG. 25 and FIG. 26, a compression spring 103 is disposed in the accommodation portion 106 of the fixed body 105 as one of the lock members 130. The compression spring 103 is compressed between one end surface of the receiving portion 106 and the lock member 130, thereby applying potential energy to the lock member 130 from the other side in one direction toward one of the sides. As described above, the wire member 87 b of the transmission device 87 is connected to the lock member 130. Furthermore, by moving the wire 87b with the swing of the handle 70, the lock member 130 is pulled up against the force imparted by the compression spring 103, and the lock member 130 moves from the locked position to the unlocked position. On the other hand, when the wire 87b moves with the swing of the handle 70, the lock member 130 is pushed down by the potential imparting force of the compression spring 103, and the lock member 130 moves from the unlocked position to the locked position.

However, the locking member 130 of this embodiment includes a spring receiving surface 131a for receiving one end of one direction of the compression spring 103, and the locking member 130 has a compression spring extending in one direction and located on the other side than the spring receiving surface 131a. The spring-side extension 135 on the side of 103. As shown in FIG. 25, when the locking member 130 slides in one direction in one side of the receiving portion 106 and is in the unlocked position, the length of the spring-side extending portion 135 is longer than one of the spring receiving surface 131a and the receiving portion 106 The length of the compression spring 103 compressed between the end faces is shorter. The above locking member 130 By using the area where the compression spring 103 is disposed without lengthening the length in one direction of the receiving portion 106, the entire length can be made longer. That is, the lock member 130 can be made longer without increasing the size and weight of the wheel holding unit 100. In addition, by making the lock member 130 longer, even if a gap for ensuring that the lock member 130 slides is provided between the lock member 130 and the storage portion 106, it is possible to effectively suppress the lock member 130 in the storage portion 106. The smooth sliding action of the locking member 130 can be achieved by shaking. Thereby, switching between the state in which the rotating body 110 can rotate with respect to the fixed body 105 and the state in which the rotating body 110 cannot rotate with respect to the fixed body 105 can be performed more reliably.

In this embodiment, as shown in FIG. 27, the spring-side extension portion 135 includes a pair of side wall portions 136 and a connection wall portion 137 connecting the pair of side wall portions 136. A portion of one side of the compression spring 103 in at least one direction is surrounded by the spring-side extension portion 135 from three sides. Therefore, the compression and expansion of the compression spring 103 as the lock member 130 slides in the receiving portion 106 is guided by the spring-side extension portion 135. As a result, the sliding movement of the locking member 130 in the receiving portion 106 becomes more stable. For example, when the lock member 130 moves from the locked position to the unlocked position, the compression spring 103 receives the compression force. At this time, the compression spring 103 can also be effectively prevented from buckling and protruding in a direction orthogonal to one direction. Thereby, the sliding movement of the locking member 130 in the receiving portion 106 becomes more stable.

Further, in this embodiment, as shown in FIGS. 25 to 27, the locking member 130 has a base portion 131 that forms a spring receiving surface 131 a and is connected to the spring-side extension portion 135, and is more oriented toward the base portion 131 than the base portion 131 connected to the base portion 131. The wheel-side extension 141 extends in one direction. And, the communicator An end portion of the wire 87b of the piece 87 is mounted on the base portion 131. The wheel-side extending portion 141 includes a pair of side wall portions 142 and a connecting wall portion 143 that connects the pair of side wall portions 142. By securing the entire length of the lock member 130 described above, smooth sliding in the accommodating portion 106 can be achieved, and the weight can be reduced.

Furthermore, according to the present embodiment, as shown in FIGS. 25 to 27, the wheel-side extension portion 141 has a tapered front end tapered front end portion 141 a on one side end in one direction. According to the locking member 130 described above, one end of the locking member 130 can extend from the receiving portion 106 of the fixed body 105 and smoothly enter inwardly through the engaging recess 114 of the rotating body 110. That is, the sliding of the lock member 130 from the lock release position to the lock position can be made smoother.

Furthermore, according to this embodiment, as shown in FIG. 25 to FIG. 27, in addition to the front end tapered portion 141 a of the wheel-side extension 141 of the lock member 130, the engaging recessed portion 114 has a tapered tip at one end in one direction. Bottom cone portion 114a. According to the wheel holding unit 100 described above, the sliding of the lock member 130 from the lock release position to the lock position can be smoothed, and the gap between the lock member 130 and the engagement recess 114 when the lock member 130 is in the lock position can be reduced. . Therefore, it is possible to smoothly transition from a state where the rotating body 110 is rotatable with respect to the fixed body 105 to a state where the rotating body 110 is restricted from rotating with respect to the fixed body 105, and it is possible to effectively prevent the following rotating body 110 from being fixed relative to the fixed body 105 Shaking. Thereby, stable walking of the stroller 10 can be achieved.

Furthermore, according to this embodiment, as shown in FIGS. 25 to 27, the compression spring 103 is a compression coil spring, and one of the ends of the wire 87b is attached to the base 131 of the lock member 130 forming the spring receiving surface 131a. It extends through the compression coil spring 103. According to the wheel holding unit 100 described above, the compression and expansion of the compression coil spring 103 as the lock member 130 slides in the receiving portion 106 is guided by the wire 87 b and the spring-side extension portion 135. Therefore, the sliding movement of the lock member 130 in the accommodating portion becomes more stable.

In this embodiment, an example has been shown in which the locking member 130 automatically moves with the movement of the handle 70 through the transmission device, but it is not limited to this. The configuration can be applied to a wheel holding unit that operates manually, and in such an example, the effect of the configuration of the lock member 130 and the wheel holding unit 100 associated with the lock member 130 can also be exerted.

<< 布 片 150 >>

Next, the cloth sheet 150 supported on the cloth sheet supporting unit 40 will be described mainly with reference to FIGS. 1, 2 and 28 to 30. As shown in detail in FIG. 28, the cloth sheet 150 has a substantially symmetrical configuration with the center of the width direction center plane extending along the front-back direction as a whole.

As shown in FIGS. 1, 2 and 28 to 30, the cloth sheet 150 includes a seat surface portion 156, a backrest portion 157 connected to the seat surface portion 156 and located behind the seat surface portion 156, and extending from the seat surface portion 156 to both sides. The left and right side portions 160 and the left and right upper side portions 167 extending from the backrest portion 157. The seat surface 156 mainly supports the hips of infants and young children who ride the stroller 10. On the other hand, the backrest portion 157 is disposed at a position facing the back of the infant. The side surface portion (first side surface portion) 160 and the upper side surface portion (second side surface portion) 167 constitute a side wall portion located on the side of the infant. In addition, the cloth sheet 150 is further connected to The upper portion 169 of the backrest portion 157 is located above the seat surface portion 156. As shown in FIG. 4, the upper portion 169 connects the left and right upper side portions 167 and functions as a headrest.

As described above, the seat surface portion 156 is mainly supported by the seat surface support element 50 of the cloth support unit 40. As shown in FIG. 28, the seat surface portion 156 is connected to the backrest portion 157 at a rear edge portion thereof, and is connected to a pair of side edge portions to side portions 160 on respective corresponding sides. The backrest portion 157 is mainly supported by the backrest support element 60 of the fabric support unit 40. As shown in FIG. 28, the backrest portion 157 has a substantially rectangular shape and one of the short sides has a curved chamfered shape in a plan view. The backrest part 157 is arrange | positioned so that the curve-shaped edge part may be separated from the seat surface part 156 toward the back or upper part.

The backrest portion 157 is connected to the rear edge portion of the seat surface portion 156 at its lower edge portion. The backrest portion 157 and the seat surface portion 156 are connected to each other by, for example, sewing. At this time, the connection portion of the backrest portion 157 and the seat surface portion 156 is divided by a sewing line extending in a linear shape. As the stroller body 11 is tilted or folded, the seat surface 156 and the backrest portion 157 of the cloth sheet 150 will approach each other. At this time, the seat-surface portion 156 and the backrest portion 157 can swing relative to each other with a line-shaped connection formed by a sewing line as a swing axis.

A pair of linear side edge portions of the backrest portion 157 are connected to the respective upper side surface portions 167. An upper portion 169 having a function as a headrest is connected to a curved upper edge portion of the backrest portion 157. A pair of upper side portions 167 are supported by the side support elements 45 of the fabric support unit 40, and the upper portion 169 is supported by the upper support elements 41 of the fabric support unit 40. In the example shown in FIG. 28, the pair of upper side portions 167 and the upper portion 169 are integrally formed using the same material. The In the example, the pair of upper side portions 167 and the upper portion 169 are connected to the backrest portion 157 by sewing, for example. At this time, the connecting portions of the upper side portion 167 and the upper portion 169 and the backrest portion 157 are divided by a sewing line extending into a U-shape. As described above, the upper support member 41 is swingable with respect to the backrest support member 60. As the upper support element 41 swings with respect to the backrest support element 60, the upper portion 169 is swung with respect to the backrest portion 157 with the linear connection formed by the sewing thread as the swing axis.

On the other hand, it can be understood from FIG. 1 and FIG. 2 that the side support element 45 does not rely on the tilting action, and maintains the established state relative to the surface divided by the backrest support element 60. Therefore, the upper side portion 167 supported by the side support element 45 without relying on the tilting action will stand on the side of the infant leaning against the backrest portion 157. The upper side portion 167 has a wider width above the side of the head of the infant. On the other hand, it has a relatively narrow width below the seat surface portion 156, and it can be understood from FIGS. 29 and 30 that the structure does not hinder the approach of the seat surface portion 156 and the backrest portion 157.

The seat surface portion 156, the backrest portion 157, the upper side portion 167, and the upper portion 169 may be in direct contact with the infant and child who rides the stroller 10. Therefore, the seat surface portion 156, the backrest portion 157, the upper side portion 167, and the upper portion 169 are made of a cushioning cloth. For example, a cloth having a cushioning sponge or the like can be used to wrap the cloth in two pieces. Material, or a cloth material made of a cushioning cloth itself. In addition, the cloth material used for the seat surface portion 156, the backrest portion 157, the upper side portion 167, and the upper portion 169 may include a reinforcing plate or the like for reinforcement. Considering that the cloth sheet 150 is cleaned, the cloth sheet 150 is preferably fixed to be removable from the stroller body 11. Can use buttons, etc. installed at various positions of cloth sheet 150 It is recognized as a connecting member for fixing the cloth sheet 150 to the stroller body 11.

Next, the left and right side portions 160 will be described in detail. As shown in FIGS. 28 to 30, each side portion 160 includes a side body portion 161 connected to the seat surface portion 156, and at least a part of the side body portion 161 disposed at a position opposite to the back surface of the upper side portion 167 on the corresponding side and side-to-side A side connection portion 165 to which at least one of the main body portion 161, the backrest portion 157, and the upper side portion 167 is connected. Considering the appearance surface, it is preferable not to rely on the inclined state, that is, even when the backrest portion 157 shown in FIG. 2 and FIG. 30 is in the most down state with respect to the seat surface portion 156, the side edge of the rear side of the side body portion 161 The portion also extends to a position facing the back surface of the upper side portion 167. In other words, the side connection portion 165 is located on the back side of the upper side portion 167 and / or the backrest portion 157 and is not exposed on the side facing the infant. Here, the surface on the opposite side to the surface facing the infant on board the stroller 10 is referred to as a "back surface".

In the illustrated example, the side connection portion 165 of the left side portion 160 is connected to the left side edge portion of the backrest portion 157, and the side connection portion 165 of the right side portion 160 is connected to the right side edge portion of the backrest portion 157. In the illustrated example, the side connection portion 165 of the left side portion 160 is connected from the back side at the connection portion of the backrest portion 157 and the left upper side portion 167, and the side connection portion 165 of the right side portion 160 is at the backrest. The connection portion between the portion 157 and the upper right side portion 167 is connected from the back side. The side connection portion 165 of each side portion 160 may be stitched so as to overlap with both the side edge portion on the side corresponding to the backrest portion 157 and the upper side portion 167 on the corresponding side. On the other hand, in the illustrated example, the side body portion 161 of the left side surface portion 160 is connected to the left side edge portion of the seat surface portion 156, and is further connected to the lower portion of the backrest portion 157. To the left side edge. Similarly, the side body portion 161 of the right side portion 160 is connected to the right side edge portion of the seat surface portion 156 and is further connected to the right side edge portion of the lower portion of the backrest portion 157. The side body portion 161 of each side portion 160 may be sewn to overlap with the side edge portion on the side corresponding to the seat surface portion 156 and the backrest portion 157.

In the illustrated example, each side portion 160 is continuously connected to the seat surface portion 156 and the backrest portion 157 at the side body portion 161 and the side connection portion 165. In particular, in the illustrated example, the position of the lower end of each of the upper side portions 167 and the backrest portion 157 is the boundary between the side body portion 161 and the side connection portion 165 in the connection edge of the side portion 160 toward the backrest portion 157. The positions are consistent.

Further, from the viewpoint of effectively preventing the side portion 160 from falling down inward in the width direction or being deformed outward in the width direction and expanding in the width direction, the side connection portion 165 of the side portion 160 should be better than the side body of the side portion 160. The portion 161 is more easily deformed. As an example, it is preferable that the side surface connecting portion 165 of the side surface portion 160 be formed using a cloth that is more easily deformed than the side surface body portion 161 of the side surface portion 160. Specifically, the side body portion 161 may be composed of a cushioning material similar to that of the seat surface portion 156, the backrest portion 157, the upper side portion 167, and the upper portion 169, and the side connection portion 165 may be formed of a simple cloth.

The side body portion 161 is held in an upright posture from the seat surface portion 156, and faces the infant from the side in the infant carriage 10. From this point of view, it is preferable that the side body portion 161 that can contact the infant is formed of a cushioning material. For example, it is better to use materials such as sponges The side body portion 161 is made of a self-supporting cloth material such as a cloth material sandwiched by two cloth materials.

As shown in detail in FIGS. 28 to 30, the first side fold 162 a and the second fold 162 b are formed in the side body portion 161 of each side portion 160. As shown in detail in FIGS. 28 to 30, the creases 162 a and 162 b generally extend along a radiation path centered on the side of the joint between the seat surface portion 156 and the backrest portion 157 on the swing axis of the seat surface portion 156 and the backrest portion 157. The side body portion 161 is divided into two parts: a first portion 161a connected to the seat surface portion 156, a third portion 161c connected to the side connecting portion 165, and a first portion 161a and a third portion 161c. Between part 2 and 161b.

The creases 162 a and 162 b are regions that are more easily deformed and extend in a linear shape than the other parts of the side body portion 161. In the illustrated example, the creases 162a and 162b are formed as sewing lines formed on a cloth material having cushioning properties. In addition, as a form other than the sewing line, creases 162a and 162b may be formed by using a through-hole formed side by side in a line shape or a thermally compressed line.

As shown in detail in FIGS. 28 to 30, reinforcing members 163 a, 163 b, and 163 c are provided on the back side of each side portion 160. The reinforcing members 163a, 163b, and 163c are made of a material that is less likely to deform than the side body portion 161, such as a plate-like member formed of a polypropylene resin, and are individually mounted on the first to third portions of each side body portion 161 161a, 161b, 161c.

In addition, as shown in FIG. 28, the cloth sheet 150 further includes a cover body 170 extending from an outer edge portion of the upper side portion 167 and an upper edge portion 157 of the upper portion 169 separated from each other. As shown in FIGS. 1 and 2, the cover body 170 is configured to cover a part of the back surface of the backrest portion 157, the upper side portion 167, and the upper portion 169. Tibetan. In addition, a part of the side body portion 161 and the side connection portion 165 of the side surface portion 160 disposed opposite to the back surface of the upper side surface portion 167 is covered with the cover body 170. The cover 170 is not shown in FIGS. 29 and 30.

However, as shown in FIG. 28, the side surface 160 of the cloth sheet 150 is provided with a connecting member 153 that is removably connected to the cloth support unit 40. The connecting member 153 is provided in the third portion 161c of the side body portion 161. In particular, in the illustrated example, the coupling member 153 is attached to the back of the third portion 161c, and is arranged near the edge portion (upper edge portion) of the third portion 161c on the side separated from the seat surface portion 156 and the backrest portion 157 and becomes The position near the side connection portion 165. On the other hand, among the fabric support unit 40, a member 46 that is relatively swung with respect to the main body frame 15 during the tilting operation is provided with a coupling member 46 that can be engaged with the coupling member 153. The cloth sheet 150 and the cloth support unit 40 are connected to each other through the connectors 153 and 46. The pair of connecting members 153 and 46 may be composed of buttons, buckles, hooks and loops, and devil felt.

As shown in FIG. 8, FIG. 9, FIG. 10, and FIG. 11, in the illustrated example, the side support element 45 of the fabric support unit 40 is provided with a connecting member 46. The portion of the side support member 45 provided with the connecting member 46 is disposed at a position offset from the front and lower connection portion 45 a of the side support member 45 toward the swing axis sc1 of the main body frame 15 in a side view of the stroller 10. It also becomes a position near the swing axis sc1. In addition, as shown in FIGS. 8 and 9, the portion of the side support member 45 provided with the coupling member 46 is in a state where the side support member 45 swings upward relative to the main body frame 15 from a side view of the stroller 10. It is located above the swing axis SC1 of the side support element 45 with respect to the main body frame 15, and is swinging toward the rear side of the side support element 45 relative to the main body frame 15. In the state, it is located further behind the swing axis sc1 of the side support member 45 relative to the main body frame 15. Further, in a side view of the stroller 10, the position of the side support element 45 provided with the coupling member 46 is a state where the side support element 45 swings upward relative to the main body frame 15 than the side support element 45 relative to the main body frame 15. The swing-back state is located further forward and upward.

Next, the operation and effect of the cloth sheet 150 of the present embodiment configured as described above will be described.

First, according to this embodiment, the side surface portion 160 of the cloth sheet 150 and the cloth sheet support unit 40 are removably connected through the connecting members 46 and 153. Therefore, as shown in FIG. 1 and FIG. 2 or as shown in FIG. 29 and FIG. 30, it is possible to effectively suppress the situation where the stroller body 11 is tilted inwardly in the width direction or expanded outward in the widthwise direction as the baby carriage body 11 is tilted. That is, according to the present embodiment, it is possible to effectively prevent the side surface portion 160 from falling inward and the side surface portion 160 being separated from the stroller body 11. Therefore, it is possible to effectively avoid a situation in which clothes and the like are sandwiched between the cloth sheet 150 and the stroller body 11. In addition, the side surface portion 160 that is tilted inward prevents the infant from riding on the seat surface 156 when the infant is riding the stroller 10. Therefore, by preventing the side portion 160 from falling inward, the infant can ride the stroller 10 appropriately and stably. Furthermore, in order to prevent the side portion 160 from falling inward, it is also preferable in terms of appearance. In addition, since the side portion 160 can be effectively prevented from expanding outward in the width direction, the side portion 160 can be effectively prevented from interfering with the stroller body 11 during the folding operation and the unfolding operation of the stroller body 11. Thereby, the folding operation and the unfolding operation of the stroller 10 can be performed stably.

At the same time, the connecting member 46 will be provided in the cloth support unit 40 The member that swings relative to the body frame 15 during the tilting operation, specifically, the side support element 45. Therefore, the portion of the side surface 160 of the cloth sheet 150 that is connected to the side support element 45 through the connecting members 46 and 153 and at least the vicinity thereof can move with the tilting operation of the cloth sheet support unit 40 of the stroller 10. Therefore, by appropriately setting the attachment positions of the coupling members 46 and 153, the side surface portion 160 can always be arranged at an appropriate position with respect to the backrest portion 157 moved by the tilting action. Thereby, it is possible to sufficiently suppress the side portion of the cloth sheet from falling down toward the inner side in the width direction or expanding outwardly in the width direction, and the side portion of the cloth sheet can be positioned at an appropriate position with respect to the backrest portion.

Further, in the above-mentioned embodiment, the portion provided with the connecting member 46 among the side support members 45 is arranged at the front and lower sides of the swing axis sc1 from the side support member 45 to the main body frame 15 in a side view of the stroller 10. The position of the portion 45a is shifted to a position near the swing axis sc1. Therefore, the side portion 160 can be appropriately arranged with respect to the backrest portion 157. On the other hand, as the backrest portion 157 is tilted, the portion of the side portion 160 where the coupling member 153 is attached moves greatly, and the side portion can be prevented more securely. The portion 160 other than the portion where the link 153 is provided, such as the portion between the side portion 160 that is connected to the seat surface portion 156 and the portion where the link 153 is provided, more specifically, the side body portion 161 The second portion 161b is poured inward or outward in the width direction.

Furthermore, in the present embodiment, as shown in FIGS. 8 and 9, the portion where the connecting member 46 is provided in the side support member 45 faces the side view of the stroller 10, and the side support member 45 faces the main frame 15. In the state of swinging upward, the swinging axis of the support element 45 relative to the main frame 15 is located above the side support element 45. The line SC1 is further above, and in a state in which the side support element 45 swings rearward relative to the main body frame 15 is located further behind the swing axis sc1 of the side support element 45 relative to the main body frame 15. Further, in a portion of the side support element 45 where the link 46 is provided, the side support member 45 swings upward relative to the main body frame 15 in a side view of the stroller 10 than the side support member 45 relative to the main body frame 15. The swing-back state is located further forward and upward. Therefore, the backrest portion 157 is erected relative to the seat surface portion 156. When the infant is sitting on the cloth sheet 150, the side portion 160 is relatively moved forward and pulled upward. With this, the side portion 160 can appropriately protect the infant and child sitting in the stroller 10 from the side. On the other hand, in a state where the backrest portion 157 is tilted relative to the seat surface portion 156 and the infant is sleeping on the cloth sheet 150, the side surface portion 160 is relatively moved rearward. Accordingly, the infants and children sleeping in the stroller 10 can be appropriately protected from the side by using the side portion 160 and the upper side portion 167.

Furthermore, according to this embodiment, a portion of the side wall of the cloth sheet 150 attached to the stroller body 11 is divided into a side portion 160 extending from the seat surface portion 156 side and an upper side portion 167 extending from the backrest portion 157. Therefore, as shown in FIG. 1 and FIG. 2 or FIG. 29 and FIG. 30, when the baby carriage body 11 is tilted, etc., the side portion 160 and the upper side portion 167 may be erected when the seat back portion 157 is tilted up. Move relatively. Therefore, it is possible to effectively suppress the side portion 160 from falling down inward in the width direction, or causing some deformation in the width direction to expand outward in the width direction.

In addition, the side surface portion 160 is connected to the backrest portion 157 by a side surface connection portion 165 disposed at a position facing the upper side portion 167 from the rear surface side. Pick up. Therefore, assembling and removing the cloth sheet 150 is easier.

Furthermore, according to this embodiment, the side connection portion 165 is made of a material that is more easily deformed than the material of the side body portion 161. According to the cloth sheet 150 described above, when the inclination angle of the backrest portion 157 with respect to the seat surface portion 156 changes with the tilting or folding action of the stroller body 11, the side portion 160 connecting the backrest portion 157 and the seat surface portion 156 is The side coupling portion 165 located on the back side of the upper side portion 167 is easily deformed, and deformation of the side body portion 161 can be suppressed. Thereby, when the seat surface portion 156 is close to the backrest portion 157 and the upper side portion 167 and the side portion 160 are relatively moved, it is possible to effectively prevent the side body portion 161 of the side portion 160 from falling inward in the width direction or expanding outward in the width direction.

Furthermore, according to the above-mentioned embodiment, the side surface portion 160 connects the seat surface portion 156 and the backrest portion 157 through the positions of the side ends of the joint portion of the seat surface portion 156 and the backrest portion 157 and extends through the linear connection portion. Therefore, at the position near the waist portion of the infant and child who rides the stroller 10, it is possible to prevent the cloth sheet 150 from forming a hole or a gap, which is preferable on the safety surface.

Furthermore, according to the above-mentioned embodiment, the junction between the side connection portion 165 and the backrest portion 157, and the boundary between the side connection portion 165 and the side body portion 161 are approximately along the center of the swing axis of the seat surface portion 156 and the backrest portion 157. A trajectory of radiation extends. Therefore, with the tilting or folding action of the stroller body 11, when the tilt angle of the backrest portion 157 of the cloth sheet 150 with respect to the seat surface portion 156 changes, the side portion 160 connecting the backrest portion 157 and the seat surface portion 156 is located on the upper side. The side surface connecting portion 165 on the back side of the portion 167 is easily deformed. This can prevent the side more effectively The side body portion 161 of the portion 160 is tilted inward in the width direction or expanded outward in the width direction.

Furthermore, according to the present embodiment, the first side fold 162a and the second fold 162b are formed in the side body portion 161 of the side portion 160. These creases 162a and 162b extend substantially in a radial shape centered on the swing axis of the seat surface portion 156 and the backrest portion 157. For example, when the stroller 10 is folded, when the backrest portion 157 and the seat surface portion 156 are very close to each other, the side portion 160 is deformed not only at the side connection portion 165 but also at the first crease 162a and the second crease 162b. The portion 161a, the second portion 161b, and the third portion 161c overlap, and the side body portion 161 can be folded. This can effectively prevent the side portion 160 of the baby carriage 10 from being tilted toward the inner side in the width direction and expanded toward the outer side in the width direction when the baby carriage 10 is folded.

Furthermore, according to this embodiment, the reinforcing members 163a, 163b, and 163c are provided in each of the first to third portions of the side body portion 161, 161a, 161b, and 161c. The reinforcing members 163a, 163b, and 163c can also effectively prevent the side surface portion 160 from falling inward in the width direction and expanding outward in the width direction when the backrest portion 157 is inclined or when the stroller 10 is folded. In particular, the reinforcing member 163c provided in the third portion 161c is disposed near the link 153. Therefore, even if the side portion 160 moves in accordance with the movement of the side support member 45, the side member 160 can be effectively prevented by the reinforcing member 163c located near the coupling members 46 and 153 connecting the side support member 45 and the side portion 160. The side 160 is tilted toward the inner side in the width direction and expanded toward the outer side in the width direction.

<< Basket 90 >>

Next, referring mainly to FIGS. 5, 7, 31, and 32, the basket portion 90 will be described. The basket 90 is mounted on the stroller body 11 and is supported at a position below the cloth support unit 40. As shown in FIG. 5, the basket portion 90 includes a bottom surface 91, a front surface 93, a rear surface 92, and a pair of side surfaces 94 extending between the front surface 93 and the rear surface 92. Among them, the bottom surface 91 includes a bottom plate 96. The rear surface 92 includes a rear portion of the bottom plate 96, that is, a rear plate 97 connected to the rear edge in the illustrated example. The bottom plate 96 and the rear plate 97 may be individually covered with a cloth material and included in the bottom surface 91 and the rear surface 92. The rear plate 97 is swingable about the axis db extending in the width direction with respect to the bottom plate 96. As shown in FIG. 5, the front portion 93 or the intermediate portion of the side surface 94 and the middle portion of the side surface 94 are connected to the stroller body 11. As a result, the rear portion of the basket portion 90 is exposed behind the cloth support unit 40 and is opened.

In FIGS. 31 and 32, a bottom plate 96 and a rear plate 97 are illustrated. In the specific example shown in FIG. 31, the rear part of the upper surface of the bottom plate 96 (the surface that becomes the inside of the basket 90) and the connecting material 98 are connected to each other by a seam 98 a along the width direction, and the front surface of the rear plate 97 The lower portion (which becomes the inner surface of the basket portion 90) and the connecting member 98 are connected to each other by a suture 98a along the width direction. The bottom plate 96 and the back plate 97 are formed using, for example, a material that has a certain degree of rigidity and can stand on its own, and the connecting material 98 can be formed of a material that is flexible such as cloth. Thereby, the bottom plate 96 and the rear plate 97 are connected to each other and can swing relative to each other.

Further, a potential-applying member 99 is installed on the bottom plate 96 and the back plate 97 and extends between the bottom plate 96 and the back plate 97. The potential energy imparting member 99 imparts potential energy to the rear surface 92 of the basket portion 90 which is tilted rearward from the bottom surface 91. Figure 32 In the specific example shown, the potential imparting member 99 is an elastic material made of, for example, rubber, and one end portion is attached to the bottom plate 96 and the other end portion is attached to the rear plate 97 in an expanded state, thereby generating potential imparting capability. .

As described above, in 90 of this embodiment, the potential energy imparting member 99 is used to impart the potential energy that the rear surface 92 of the basket 90 is tilted rearward from the bottom surface 91. Therefore, since the rear surface 92 of the basket portion 90 is unfolded rearward, the baggage can be easily accessed. In addition, since it is easy to visually look inside the basket portion 90, it is possible to effectively prevent forgetting to take out luggage from the basket portion 90. Furthermore, since it is possible to effectively prevent forgetting to take out luggage, it is possible to effectively prevent a situation in which the folding operation of the stroller 10 is hindered due to forgetting to take out luggage.

Further, as shown in FIG. 5, the upper edge of the side surface 94 is formed as a side reinforcing edge 94 a and is maintained in a tight state between the front surface 93 and the rear surface 92. Since the side surface 94 of the basket portion 90 is tight and does not fall to the inside, the baggage can be easily accessed. In addition, since it is easy to visually look inside the basket portion 90, it is possible to effectively prevent forgetting to take out luggage from the basket portion 90. Furthermore, since forgetting to take out luggage can be effectively prevented, it is possible to effectively prevent a situation in which the folding operation of the stroller 10 is hindered by forgetting to take out luggage.

Furthermore, in this embodiment, the stroller body 11 is configured to be foldable. Moreover, as shown in the side view of the stroller body 11 when folded, as shown in FIG. 7, the rear surface 92 of the basket 90 can utilize the potential energy from the potential energy imparting member 99, so that the upper edge of the stroller body 11 is greater than the baby when the stroller body 11 is unfolded. When the vehicle body 11 is unfolded, the lower edge is inclined downward. When the stroller 10 is folded, the luggage stored in the basket portion 90 is automatically withdrawn from the basket portion 90 by the inclination of the rear surface 92. From this point of view, it can also effectively prevent forgetting to start from the basket 90. Taking out the luggage can effectively prevent the folding action of the stroller 10 from being hindered by forgetting to take out the luggage.

Furthermore, in this embodiment, the side view of the stroller body 11 shown in FIG. 7 when folded is the bottom surface 91 of the lower basket portion 90. The rear edge when the stroller body 11 is unfolded may be lower than the front edge when the stroller body 11 is unfolded. Way tilted. When the stroller 10 is folded, the luggage stored in the basket 90 is automatically withdrawn from the basket 90 by the inclination of the bottom surface 91. From this point of view, it is also possible to effectively prevent forgetting to take out the luggage from the basket 90, and it is possible to effectively prevent a situation in which the folding operation of the stroller 10 is hindered due to forgetting to take out the luggage.

Claims (9)

A stroller includes: a stroller body having front and rear feet; a handle connected to the stroller body and swingable between a first position and a second position relative to the stroller body; and a wheel holding unit, The wheel holding unit is provided on at least one of the front foot and the rear foot, and has a wheel, a rotating body, a fixed body, and a locking member. The rotating body supports the wheel to be rotatable, and the fixed body is installed on the front foot and the front foot. At least one of the rear feet supports the rotating body rotatably about an axis that is not parallel to the rotation axis of the wheel, and the locking member can be in a locked position that restricts the rotation of the rotating body relative to the fixed body, and enables the rotating body to rotate. The rotating body is moved between a lock-releasable position rotatable with respect to the fixed body, and the stroller is provided with a switching mechanism, and the switching mechanism releases the lock member from the lock in response to the swing of the handle relative to the stroller body. Position toward the lock position, or release from the lock position toward the lock The switching mechanism includes a first switching member provided on the handle and movable with the swing of the handle, supported on the rear foot and capable of moving relative to the rear foot with the movement of the first switching member. The second switching member and a transmission device that transmits the operation of the second switching member to the locking member, wherein the first switching member has contact with the second switching member when the handle is moved as the handle is swung. The cam abutting surface that moves the second switching member relative to the rear foot, the second switching member has a cam receiving piece that receives the cam abutting surface, and the position of the cam receiving piece that contacts the cam abutting surface varies with According to the swing of the handle, the position of the cam abutting surface contacting the cam receiving piece changes with the swing of the handle. The handle is arranged at a position between the first position and the second position. In one position, the cam abutting surface will contact the entire opposing surface of the cam receiving piece that is in contact with the cam abutting surface. For example, in the baby carriage of claim 1, when the handle is swung in a certain direction relative to the body of the baby carriage, the position of the cam receiving piece that contacts the cam contact surface will be upstream from the movement path of the cam contact surface. Change side to side. If the baby carriage of claim 1 or 2, wherein the handle is disposed in the first position, the cam abutting surface will be disposed only in contact with the handle swinging from the first position to the second position. With respect to the position of a part of the facing surface of the part of the cam receiving piece, the cam abutting surface is arranged to swing from the first position to the second position only with the handle when the handle is disposed at the second position. The position of a part of the facing surfaces among the parts of the cam receiving piece in contact with each other. A stroller includes: a stroller body having front and rear feet; a handle swingably connected to the stroller body; and a wheel holding unit, which is a wheel holding unit provided at least one of the front foot and the rear foot, and has A wheel, a rotating body, a fixed body, and a locking member. The rotating body supports the wheel to be rotatable. The fixed body is installed on at least one of the front foot and the rear foot and is not parallel to the rotation axis of the wheel. The rotation body is supported to be rotatable with the axis as the center, and the lock member may be between a locked position that restricts the rotation of the rotation body with respect to the fixed body, and a unlocked position that allows the rotation body to rotate with respect to the fixed body. Moving, and the stroller is provided with a switching mechanism, the switching mechanism causes the lock member to move from the lock release position to the lock position, or from the lock position toward the lock release in response to the swing of the handle relative to the stroller body Position shift, the switching mechanism includes: provided on the handle A first switching member operable as the handle is swung, a second switching member supported by the rear foot and capable of sliding relative to the rear foot as the first switching member moves, and a second switching member A transmission device that transmits an operation toward the lock member, wherein the first switching member includes a cam contacting the second switching member and sliding the second switching member along the rear foot when the first switching member moves in response to the swing of the handle. The contact surface, the second switching member has a cam receiving piece that receives the cam contact surface, and the position of the cam receiving piece that contacts the cam contact surface changes with the swing of the handle. The cam receiving piece has At least two cam receiving protrusions protruding toward the cam abutting surface, the cam receiving protrusions are disposed at positions separated along a moving path of the cam abutting surface as the handle swings, and the handle can be opposite to The stroller body swings between a first position and a second position, and the handle is disposed between the first position and the second position When a position between, the cam surface will contact the abutment surface along a moving path of the cam while contacting with the adjacent two cam receiving protrusion. A stroller includes: a stroller body having front and rear feet; a handle connected to be swingable relative to the stroller body; and a wheel holding unit, which is a wheel holding unit provided at least one of the front foot and the rear foot, The wheel has a wheel, a rotating body, a fixed body, and a locking member. The rotating body supports the wheel to be rotatable. The fixed body is installed on at least one of the front foot and the rear foot. The parallel axis is used as a center to support the rotating body to be rotatable. The locking member may be in a locked position that restricts the rotation of the rotating body relative to the fixed body, and a lock release position that allows the rotating body to rotate relative to the fixed body. And the baby carriage is provided with a switching mechanism, and the switching mechanism causes the lock member to move from the lock release position to the lock position or from the lock position to the lock in response to the swing of the handle relative to the stroller body. When the position is released, the switching mechanism includes: A first switching member that can be moved by hand with the swing of the handle, a second switching member that is supported by the rear foot and can slide relative to the rear foot with the movement of the first switching member, and the second A transmission device that conveys the movement of the switching member toward the lock member. The first switching member has a contact with the second switching member and slides the second switching member along the rear foot when the first switching member is moved in response to the swing of the handle. The second switching member has a cam receiving piece that receives the cam abutting surface, and the position of the cam receiving piece that contacts the cam abutting surface changes with the swing of the handle. The handle The cam receiving piece can swing between the first position and the second position with respect to the stroller body. The cam receiving piece has two cam receiving protrusions protruding toward the cam abutting surface. The cam receiving protrusions are located on the handle. When moving from the first position to the second position, the first cam receiving protrusion on the upstream side of the moving path of the cam contact surface is located at The second cam receiving protrusion on the swimming side is in a state where the handle is disposed in the first position, and the cam abutting surface is only the same as the first cam receiving protrusion among the first cam receiving protrusion and the second cam receiving protrusion. The cam-receiving projection faces the first cam-receiving projection and is in contact with the first cam-receiving projection. When the handle is disposed at the second position, the cam-receiving surface is in the first cam-receiving projection and the second cam-receiving portion. Among the protruding portions, only the surface facing the second cam receiving protruding portion is in contact with the second cam receiving protruding portion. If the baby carriage of claim 5, wherein the handle is disposed in a first intermediate position between the first position and the second position, the cam abutting surface and the first cam receiving protrusion and the second The two surfaces of the cam receiving protrusion are opposite to each other and only contact the first cam receiving protrusion. When the handle is disposed at the second intermediate position between the first intermediate position and the second position, the cam abuts. The surface is opposed to both the first cam receiving protrusion and the second cam receiving protrusion, and is in contact with the second cam receiving protrusion only. In the baby carriage of claim 6, wherein the handle is disposed at a position between the first intermediate position and the second intermediate position, the cam abutting surface and the first cam receiving protrusion and the second cam The two sides of the protruding portion are contacted. If the stroller according to any one of claims 5 to 7 is viewed along the swing axis of the handle relative to the stroller body, from the swing axis of the handle relative to the stroller body to the cam abutting surface The linear distance of each position is gradually increased from one end of the cam abutting surface to the other end of the cam abutting surface. One end of the cam abutting surface is when the handle moves from the first position to the second. When the position is swung forward, the other end of the cam abutting surface is when the handle is swung from the first position to the second position, and when the handle is disposed toward the second position The linear distance from the swing axis of the handle relative to the stroller body to the second cam receiving protrusion is greater than the linear distance from the swing center of the handle relative to the stroller body to the first cam receiving protrusion. short. A stroller includes: a stroller body having front and rear feet; a handle swingably connected to the stroller body; and a wheel holding unit, which is a wheel holding unit provided at least one of the front foot and the rear foot, and has A wheel, a rotating body, a fixed body, and a locking member. The rotating body supports the wheel to be rotatable. The fixed body is installed on at least one of the front foot and the rear foot and is not parallel to the rotation axis of the wheel. The rotation body is supported to be rotatable with the axis as the center, and the lock member is movable between a locked position that restricts the rotation of the rotation body with respect to the fixed body, and a lock release position that allows the rotation body to rotate with respect to the fixed body In addition, the stroller is provided with a switching mechanism, and the switching mechanism causes the lock member to move from the lock release position to the lock position or from the lock position to the lock release position in response to the swing of the handle relative to the stroller body. Moving, the switching mechanism includes: provided on the handle and A first switching member operable by swinging the handle, a second switching member supported by the rear foot and capable of sliding relative to the rear foot in accordance with the operation of the first switching member, and an operation of moving the second switching member The transmission device that conveys to the lock member, wherein the first switching member includes a cam that abuts the second switching member and causes the second switching member to slide along the rear foot when the handle is moved as the handle is swung. Surface, the second switching member has a cam receiving piece that receives the cam abutting surface, and the position of the cam receiving piece that contacts the cam abutting surface changes with the swing of the handle, and is relative to the handle along the handle. When viewed from the swing center of the stroller body, the linear distance from the swing center of the handle relative to the stroller body to each position of the cam contact surface is from one end of the cam contact surface to the cam contact surface. The other end of the cam gradually becomes longer. One end of the abutting surface of the cam is swinging from one side to the other side of the handle from a swingable range. The other side of the abutting surface of the cam is the rear side of the moving direction when the handle is swung from one side to the other side within a swingable range, and is parallel to the swing axis of the handle The width of the cam contact surface in the direction is gradually widened from one end of the cam contact surface to the other end of the cam contact surface on the rear side in the moving direction.