JP6169426B2 - Baby carriage and seat support unit - Google Patents

Description

  The present invention relates to a baby carriage and a seat support unit.

  Baby carriages for carrying infants are widely used. The baby carriage disclosed in Patent Literature 1 includes a seat support frame, a back support frame, a side plate, and a headrest for supporting a seat body having cushioning properties. In this baby carriage, the back support frame is swingable with respect to the seat support frame so that reclining is possible. The side plate is also swingable with respect to the seat support frame and the headrest. The side plate functions as a link and swings the headrest with respect to the back support frame in response to the swing of the back support frame.

JP2007-99000

  By the way, as disclosed in Patent Document 1, for example, most of the baby carriages that are used are configured to be foldable. In the foldable baby carriage, each component is connected so as to be rotatable with respect to each other using a shaft member, and some of the elements also function as links. Therefore, the foldable baby carriage is assembled by pivoting the components to each other using the shaft member. In this case, when three or more components are pivotally mounted using a single shaft member, it is preferable in that the number of parts can be reduced by reducing the number of shaft members, but the assembly workability is deteriorated. To do. If the assembly work cannot be performed stably, the relative rotation between the components of the manufactured baby carriage may not be smooth.

  The present invention has been made in consideration of the above points, and an object thereof is to provide a baby carriage excellent in assembling workability.

The first baby carriage according to the present invention is:
Body frame,
A seat support unit connected to the main body frame via a shaft member and connected to the main body frame so as to be rotatable about the axial direction of the shaft member;
The seat support unit includes a seat surface support element that faces the buttocks of the infant, and a backrest support element that faces the back of the infant,
One of the seat surface portion support element and the backrest portion support element is provided with a boss including a boss surface positioned on a circumference centering on the axial direction of the shaft member, and the seat surface portion support element and the back surface support element are provided. A boss receiver that receives the boss surface of the boss is formed on the other of the abutting support elements,
By the engagement via the boss and the boss receiver, the back support portion support element is connected to the seat surface portion support element, and the seat surface portion is centered on the rotation center of the seat support unit with respect to the main body frame. A baby carriage that can swing relative to the support element.

  The 1st baby carriage by this invention WHEREIN: The through-hole which the said shaft member penetrates may be formed in the said seat surface part support element and the said back support part support element.

  In the first baby carriage according to the present invention, one of the main body frame and the seat support unit is provided with a second boss including a boss surface located on a circumference around the axial direction of the shaft member, A second boss receiver that receives the boss surface of the second boss may be formed on the other of the main body frame and the seat support unit.

In the first baby carriage according to the invention,
The body frame is
A front link connected to the first link element and swingable with respect to the first link element;
A rear leg connected to the first link element and swingable relative to the first link element;
The second link connected to the rear portion of the first link element and swingable relative to the first link element, and connected to the seat support unit and swingable relative to the seat support unit. Elements and
A third link element connected to the rear leg and swingable relative to the rear leg, and connected to the second link element and swingable relative to the second link element; ,
The shaft member passes through the second link element, the third link element, and the seat support unit in this order,
The second boss may be provided on one of the third link element and the sheet support unit, and the second boss receiver may be formed on the other of the third link element and the sheet support unit.

  In the first baby carriage according to the present invention, the baby carriage main body configured to include the main body frame and the seat support unit is connected to the baby carriage main body via a shaft member, and the axial direction of the shaft member is centered on the baby carriage main body. The handle further includes a swingably connected handle, and one of the baby carriage body and the handle is provided with a third boss including a boss surface located on a circumference centering on the axial direction of the shaft member. A third boss receiver for receiving the boss of the third boss may be formed on the other of the baby carriage body and the handle.

  In the first baby carriage according to the present invention, together with the boss surface located on a part of the circumference, a pair of end faces located on both sides of the boss surface along the circumference and non-parallel to the boss surface, The third boss receiver further includes a boss receiving surface located on a circumference centered on the axial direction of the shaft member, and located on both sides of the boss receiving surface along the circumference, and the boss A pair of end surfaces that are non-parallel to the surface, engagement between one end surface of the third boss and one end surface of the third boss receiver, and the other end surface of the third boss and the third A range in which the handle can swing with respect to the baby carriage body may be defined by engagement with the other end surface of the boss receiver.

In the first baby carriage according to the invention,
The body frame is
A front link connected to the first link element and swingable with respect to the first link element;
A rear leg connected to the first link element and swingable relative to the first link element;
The second link connected to the rear portion of the first link element and swingable relative to the first link element, and connected to the seat support unit and swingable relative to the seat support unit. Elements and
A third link element connected to the rear leg and swingable relative to the rear leg, and connected to the second link element and swingable relative to the second link element; ,
The shaft member passes through the handle, the second link element, the third link element, and the seat support unit in this order,
The third boss may be provided on one of the second link element and the handle, and the third boss receiver may be formed on the other of the second link element and the handle.

The seat support unit according to the present invention comprises:
A seat support unit which is connected to the main body frame via the shaft member so as to be rotatable about the axial direction of the shaft member to form a baby carriage,
The seat support unit includes a seat surface support element that faces the buttocks of the infant, and a backrest support element that faces the back of the infant,
One of the seat surface portion support element and the backrest portion support element is provided with a boss including a boss surface positioned on a circumference centering on the axial direction of the shaft member, and the seat surface portion support element and the back surface support element are provided. A boss receiver that receives the boss surface of the boss is formed on the other of the abutting support elements,
By the engagement via the boss and the boss receiver, the back support portion support element is connected to the seat surface portion support element, and the seat surface portion is centered on the rotation center of the seat support unit with respect to the main body frame. A seat support unit that is swingable relative to the support element.

The second baby carriage according to the present invention is:
Body frame,
A seat support unit connected to the main body frame via a shaft member and connected to the main body frame so as to be rotatable about the axial direction of the shaft member;
One of the main body frame and the seat support unit is provided with a boss including a boss surface located on a circumference centered on the axial direction of the shaft member, and the other of the main body frame and the seat support unit, A boss receiver for receiving the boss surface of the boss is formed.

  In the second baby carriage according to the present invention, a through hole through which the shaft member passes may be formed in the main body frame and the seat support unit.

The third baby carriage according to the present invention is:
The baby carriage body,
A handle connected to the baby carriage main body via a shaft member and connected to the baby carriage main body so as to be swingable about the axial direction of the shaft member;
One of the baby carriage body and the handle is provided with a boss including a boss surface located on a circumference centered on the axial direction of the shaft member, and the other of the baby carriage body and the handle has the boss A baby carriage with a boss receiver that receives the boss face.

  In the third baby carriage according to the present invention, a through hole through which the shaft member passes may be formed in the baby carriage main body and the handle.

  According to the present invention, the assembly workability of the baby carriage can be improved.

FIG. 1 is a perspective view illustrating a baby carriage in a state where a seat backrest is raised and a handle is disposed at a first position for explaining an embodiment of the present invention. FIG. 2 is a perspective view showing the baby carriage of FIG. 1 in a state where the backrest portion of the seat 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 seat removed with the back support portion supporting element of the seat support unit raised and the handle disposed at the first position. FIG. 4 is a perspective view showing the baby carriage of FIG. 2 with the seat removed in a state where the back support portion support element of the seat support unit is tilted and the handle is disposed at the second position. FIG. 5 is a side view of the baby carriage of FIG. FIG. 6 is a side view of the baby carriage of FIG. FIG. 7 is a side view showing the folded baby carriage of FIG. 1 with the seat removed. FIG. 8 is a side view of the baby carriage in the state shown in FIG. 3, showing a part of the baby carriage around the seat support unit. FIG. 9 is a view showing a part of the baby carriage centered on the seat support unit, and is a side sectional view of the baby carriage in a state where the back support portion supporting element of the seat support unit is tilted. FIG. 10 is a perspective view showing the seat support unit. FIG. 11 is a perspective view showing the connecting portion of the seat support unit and the main body frame from the inside in the width direction. FIG. 12 is a perspective view showing the connecting portion of the seat support unit and the main body frame from the inside in the width direction. FIG. 13 is a cross-sectional view showing a connection portion between the seat support unit and the main body frame in a cross section along the width direction. FIG. 14 is a partial perspective view showing a connection portion between the handle and the baby carriage body from the outside in the width direction. FIG. 15 is a side view showing a connecting portion between the handle and the baby carriage body from the outside in the width direction. FIG. 16 is a perspective view showing a connection portion between the handle and the baby carriage body from the outside in the width direction. FIG. 17 is a side view schematically showing the connecting portion of the handle and the baby carriage main body from the outside in the width direction, and is a view for explaining the operation of the switching mechanism. FIG. 18 is a side view schematically showing the connecting portion of the handle and the baby carriage body from the outside in the width direction, and is a view for explaining the operation of the switching mechanism. FIG. 19 is a side view schematically showing the connecting portion of the handle and the baby carriage body from the outside in the width direction, and is a view for explaining the operation of the switching mechanism. FIG. 20 is a side view schematically showing the connecting portion of the handle and the baby carriage body from the outside in the width direction, and is a view for explaining the operation of the switching mechanism. FIG. 21 is a side view schematically showing the connecting portion of the handle and the baby carriage body from the outside in the width direction, and is a view for explaining the operation of the switching mechanism. FIG. 22 is a perspective view showing the wheel holding unit with one wheel removed. FIG. 23 is a side view showing the wheel holding unit with the wheel removed. 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 the line XXIII-XXIII in FIG. 23 and is a view for explaining the operation of the lock member. FIG. 26 is a cross-sectional view similar to FIG. 25 and is a view for explaining the operation of the lock member. FIG. 27 is a perspective view showing a lock member. FIG. 28 is a plan view showing the sheet in an unfolded state. FIG. 29 is a side view showing the seat in a state of being supported by the seat support unit of FIG. 30 is a side view showing the seat in a state of being supported by the seat support unit of FIG. FIG. 31 is a perspective view showing the bottom panel and the rear panel incorporated in the car from the upper front side. FIG. 32 is a perspective view showing the bottom panel and the rear panel incorporated in the car from the lower rear side.

  Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1-32 is a figure for demonstrating one Embodiment of the baby carriage by this invention.

<< Outline of baby carriage >>
1 to 32 show the overall configuration of the baby carriage 10 in the present embodiment. The illustrated baby carriage 10 includes a main body frame 15 and a baby carriage body 11 having a seat support unit 40 supported by the main body frame 15, a seat 150 attached to the seat support unit 40, and a handle 70 connected to the baby carriage body 11. And a wheel holding unit 100 attached to the front leg 20 and the rear leg 21 of the main body frame 15, and a car 90 supported by the baby carriage main body 11. The seat 150 may be a known one having cushioning properties, and is preferably detachable from the seat support unit 40. An infant sits or sleeps on the seat 150. Although not shown, other members such as a hood may be further provided in the baby carriage 10.

  As shown in FIG. 7, the baby carriage 10 in the present embodiment can be folded so that the front legs 20, the rear legs 21, and the handle 70 are close to each other. Many components of the baby carriage body 11 are pivoted to each other to allow folding. Further, the seat 150 is formed using a flexible cloth material or the like, and can be deformed as the baby carriage 10 is folded.

  In the present embodiment, the handle 70 is connected to the baby carriage body 11 and can swing with respect to the baby carriage body 11. The handle 70 has a first position (rear pressing position, rearward position) shown in FIGS. 1, 3 and 5 and a second position (facing pressing position, frontward) shown in FIGS. Position). For this reason, the operator (guardian) holds the handle 70 from the back side of the infant and operates the stroller 10 to drive the stroller 10 so that the infant faces forward in the traveling direction. It is possible to both handle the baby carriage 10 by gripping the handle 70 from the position on the front leg side facing the infant and driving the baby carriage 10 such that the rear leg side of the baby carriage 10 is in the forward direction. .

  The wheel holding unit 100 attached to at least one of the front leg 20 and the rear leg 21 includes a rotating body 110 that rotatably holds the wheel 101, and an axis that is not parallel to the rotation axis Ar of the wheel 101 (also referred to as a “caster axis Ac”). And a fixed body 105 that rotatably supports the rotating body 110 around a so-called caster. The baby carriage 10 can be automatically switched according to the position of the handle 70 so that the rotating body 110 of the wheel holding unit 100 can be switched between a rotatable state and a non-rotatable state with respect to the fixed body 105. A mechanism 88 is provided. In particular, in this embodiment, the front leg 20 and the rear leg 21 are all provided with a wheel holding unit 100 configured as a caster, and the switching mechanism 88 is positioned on the front side in the traveling direction according to the position of the handle 70. Rotation in the wheel holding unit 100 attached to the leg positioned on the rear side in the advancing direction that allows the wheel holding unit 100 attached to the leg to rotate around the caster axis Ac with respect to the fixed body 105 of the rotating body 110. The rotation of the body 110 around the caster axis Ac with respect to the fixed body 105 is restricted.

  In the present specification, the terms “front”, “rear”, “upper” and “lower” with respect to the baby carriage 10 and its constituent elements are infants riding on the baby carriage 10 in the unfolded state unless otherwise specified. Means “front”, “rear”, “upper” and “lower”. Therefore, the “front-rear direction” corresponds to the direction connecting the lower left and the upper right of the page in FIGS. 1 to 4 and the direction connecting the left and right of the page in FIGS. 5 and 6. Unless otherwise specified, “front” refers to the side on which the infant who rides faces, the lower left side of the paper surface in FIGS. 1 to 4, and the left side of the paper surface in FIGS. 5 and 6 as “front side”. Become. On the other hand, the “vertical direction” is a direction orthogonal to the front-rear direction and orthogonal to the surface (ground) on which the baby carriage 10 is placed. Therefore, when the surface on which the baby carriage 10 is placed is a horizontal plane, the “vertical direction” refers to the vertical direction. The “lateral direction” and the “width direction” are directions orthogonal to both the “front-rear direction” and the “up-down direction”. Furthermore, “right” and “left” also mean “right” and “left” in the lateral direction or width direction with respect to the infant riding in the baby carriage 10, respectively.

  As shown in the figure, the baby carriage 10 is generally symmetric with respect to the center plane in the width direction extending along the front-rear direction. Hereinafter, each component of the baby carriage 10 in the present embodiment will be described with reference to the drawings.

<< Pram body and steering wheel >>
The baby carriage main body 11 includes a main body frame 15 having a front leg 20 and a rear leg 21, and a seat support unit 40 connected to the main body frame 15 via a shaft member 13. The seat support unit 40 is rotatably attached to the main body frame 15 via the shaft member 13. Thereby, relative operation | movement with respect to the main body flame | frame 15 of the sheet | seat support unit 40 with the folding operation | movement and expansion | deployment operation | movement of the baby carriage 10 is attained. The center of rotation of the seat support unit 40 relative to the main body frame 15 coincides with the axial direction da of the shaft member 13, and in particular in the illustrated example, is parallel to the width direction of the baby carriage 10. In the present embodiment, the handle 70 is swingably attached to the baby carriage body 11 via the shaft member 13. The rotation center of the handle 70 with respect to the baby carriage main body 11 coincides with the axial direction da of the shaft member 13, and is therefore parallel to the width direction of the baby carriage 10. First, the seat support unit 40 of the baby carriage main body 11 will be described, then the main body frame 15 of the baby carriage main body 11 will be described, and then the handle 70 will be described.

<Sheet support unit 40>
As shown well in FIGS. 2, 3, and 8 to 10, the seat support unit 40 includes a seat surface support element 50 that faces the buttocks of an infant riding on the baby carriage 10 from below, and the baby carriage 10. And a back support member 60 that faces the back of the infant riding on the back. The backrest support element 60 is swingable (can be tilted) with respect to the seat surface support element 50. Thereby, the reclining operation | movement of the baby carriage 10 is attained. The reclining angle of the backrest support element 60 is controlled by adjusting the length of a reclining adjustment belt (not shown) attached to the main body frame 15 through the back surface of the backrest support element 60. Can do.

  The seat surface support element 50 has a pair of rear connection portions 54 disposed in the rear portion thereof so as to be separated from each other in the width direction. On the other hand, the back support part support element 60 has a pair of lower connection parts 62 arranged in the lower part thereof so as to be spaced apart from each other in the width direction. 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 connection portion 54 and the lower connection portion 62, the back support portion support element 60 is swingably connected to the seat surface portion support element 50. In the illustrated example, the pair of rear connection parts 54 are located inside the pair of lower connection parts 62 in the width direction. However, the present invention is not limited to this example. For example, the pair of lower connection parts 62 is a pair of rear connection parts. You may make it locate in the width direction inside of the part 54. FIG.

  As shown in FIG. 13, a through hole 50 a and a through hole 60 a through which the shaft member 13 passes are formed in the rear connection portion 54 and the lower connection portion 62, respectively. As can be understood from FIGS. 10 to 12, the pair of shaft members 13 are arranged apart from each other in the width direction. Each shaft member 13 extends through the through hole 50a and the through hole 60a of the rear connection part 54 and the lower connection part 62 on the corresponding side.

  Further, the lower connection portion 62 is provided with a boss (first boss) 62a provided on a circumference centering on the axial direction da of the shaft member 13 and protruding in the axial direction da. The boss 62a has a boss surface (outer surface) located on the entire circumference or a part of the circumference centering on the axial direction da. On the other hand, the rear connection portion 54 is formed with a boss receiver 54a that receives the boss surface 62a1 of the boss 62a. The boss receiver 54 a has a boss receiving surface 54 a 1 located on the entire circumference or a part of the circumference centering on the axial direction da of the shaft member 13. When the rear connection portion 54 and the lower connection portion 62 rotate relative to each other, the boss surface 62a1 of the boss 62a and the boss reception surface 54a1 of the boss receiver 54a slide relative to each other. Thus, the back support part support element 60 can swing with respect to the seat surface part support element 50 by engaging the boss 62a and the boss receiver 54a. In particular, since the boss 62a extends on the circumference centered on the axial direction da of the shaft member 13, the swing axis of the back support portion 60 with respect to the seat surface portion support element 50 coincides with the axial direction da of the shaft member 13. To do. Further, each boss 62a provided on one of the rear connection part 54 and the lower connection part 62 enters the corresponding boss receiver 54a provided on the other of the rear connection part 54 and the lower connection part 62, for example, Even in the state before being penetrated by the shaft member 13, the seating surface portion support element 50 and the backrest portion support element 60 are connected to each other in a state in which relative swing is possible. Unlike the illustrated example, a boss may be provided at the rear connection portion 54 and a boss receiver may be provided at the lower connection portion 62.

  In the example shown in FIG. 13, a boss 62 a that protrudes inward in the width direction is formed on the lower connection portion 62 of the back support portion support element 60. The boss 62a forms a part of the through hole 60a through which the shaft member 13 passes. The bosses 62a projecting inward in the width direction circulate in an annular shape on a circumference centering on the axial direction da of the shaft member 13. On the other hand, a boss receiver 54 a that receives the boss 62 a is formed in the rear connection portion 54 of the seat surface portion support element 50. The boss receiver 54a is formed by the inner peripheral surface of the through hole 50a through which the shaft member 13 formed in the rear connection portion 54 passes. Accordingly, in the illustrated example, the through hole 50 a of the rear connection portion 54 receives the shaft member 13 via the boss 62 a of the lower connection portion 62. According to such a form, the length along the axial direction da of the through-hole 60a formed in the back support part support element 60 can be lengthened. Therefore, the swing of the seat support unit 40 with respect to the shaft member 13 can be suppressed, and the relative swing between the seat support unit 40 and the main body frame 15 via the shaft member 13 can be smoothed.

  Hereinafter, the seat surface portion support element 50 and the backrest portion support element 60 in the illustrated embodiment will be described in more detail. The seat surface portion support element 50 includes a seat surface portion support frame 51 formed in a U-shape, a frame end member 53 attached to a U-shaped end portion 51 a formed by the seat surface portion support frame 51, and a seat surface portion support frame 51. And a base sheet 55 stretched on. The base sheet 55 is shown only in FIG.

  The seating surface part support frame 51 has a pair of side frame parts 52a and a connecting frame part 52b extending between the pair of side frame parts 52a. The pair of side frame portions 52a are configured symmetrically and extend substantially in the front-rear direction. The connecting frame portion 52b extends so as to connect the front end portions of the pair of side frame portions 52a. The seating surface portion support frame 51 can be an integral part (member) formed by bending a metal pipe made of a single material, for example, aluminum. The frame end member 53 can be formed using, for example, a resin as a component (member) extending in a plane orthogonal to the width direction. In the illustrated embodiment, the frame end member 53 forms a rear connection portion 54 that becomes a joint portion with the back support portion support element 60.

  The base sheet 55 supported in a stretched state on the seating surface portion support frame 51 is a sheet-like member formed from, for example, a cloth material or a mesh material. The illustrated base sheet 55 includes a main sheet portion 56 at least partially positioned in a region surrounded by three sides in a plan view by the pair of side frame portions 52a and the connecting frame portion 52b of the seating surface portion support frame 51, and the main sheet portion. A cylindrical portion 57 and a belt portion 58 connected to or attached to 56. As shown in FIG. 10, the tubular portion 57 is connected to the front edge of the main sheet portion 56 and forms a through hole extending in the width direction. Further, the belt portion 58 is connected to the main sheet portion 56 at both ends thereof, and a support through hole 55 a is formed between the belt portion 58 and the main sheet portion 56. The rear end edge of the main seat portion 56 is connected to a lower portion of a backrest support element 60 described below. The base sheet 55 is attached to the seat surface portion support frame 51 such that the connecting frame portion 52b of the seat surface portion support frame 51 passes through the cylindrical portion 57 and the pair of side frame portions 52a passes through the support through holes 55a. The base sheet 55 is maintained in a stretched state in both the front-rear direction and the width direction.

  The back support portion support element 60 has a main plate portion 61 formed in a flat plate shape. A pair of lower connection portions 62 that become connection portions with the seating surface portion support element 50 extends downward from the main plate portion 61. Although not shown in detail, the main plate portion 61 may be formed with ventilation holes, fins for adjusting the ventilation amount, and the like.

  As shown well in FIGS. 2, 3, and 8 to 10, the seat support unit 40 is connected to the back support section support element 60 and is swingable with respect to the back support section support element 60. 41 and side support elements 45 respectively connected to the upper support element 41 and the main body frame 15. The side support element 45 can swing with respect to the upper support element 41 and the main body frame 15. As well shown in FIG. 10, in this embodiment, the upper support element 41 is connected to the back support part support element 60 via two lower connecting parts 41b that are spaced apart in the width direction. doing. Moreover, the side connection part 41a located in the both sides of the upper support element 41 is rotatably connected with the rear upper connection part 45b of the side support element 45 located in a corresponding side. On the other hand, the side support element 45 is connected to the main body frame 15 at the front lower connecting portion 45a. In the present embodiment, the front lower connecting portion 45 a of the side support element 45 is pivotally attached to a second link element 24 described later of the main body frame 15.

  However, the present invention is not limited to the illustrated example. As an example, the front lower connecting portion 45a of the side support element 45 is not the second link element 24, but another part of the main body frame 15, the seat surface portion support element 50, the backrest. It may be pivotally attached to the part support element 60 or the like.

  As shown in FIGS. 2 to 6, 8, and 9, the side support element 45 swings about the front lower connection part 45 a as the back support part support element 60 swings with respect to the seat surface part support element 50. It is supposed to be. Thereby, the side support element 45 comes to be located on the side of the infant on the seat 150 when the seat 150 is reclining or not. Preferably, the side support element 45 functions as a link, and swings the upper support element 41 with respect to the back support part support element 60 in response to the swing of the back support part support element 60 with respect to the seat surface part support element 50. Configured to let In the baby carriage 10 according to the present embodiment, as shown in FIGS. 3 and 5, the upper support element 41 rises with respect to the back support section support element 60 in a state where the back support section support element 60 has fallen. ing. Therefore, the infant lying on the seat support unit 40 can be protected from the side by the pair of side support elements 45 and can be protected from the rear by the upper support element 41. On the other hand, as shown in FIGS. 4 and 6, the upper support element 41 extends substantially parallel to the back support section support element 60 in a state where the back support section support element 60 is raised. Therefore, the infant sitting on the seat support unit 40 can be protected from the side by the pair of side support elements 45, and the upper support element 41 functions as a headrest.

  In the present embodiment, as shown in FIG. 10, a connecting frame element 68 is provided between the frame end members 53 of the seating surface portion supporting element 50. Then, a tension member (not shown) may extend between the base sheet 55 and the connecting frame element 68, and the tension sheet may be used to maintain the base sheet 55 more stably. Further, according to the connecting frame element 68, it is possible to prevent the member located outside in the width direction of the seat support unit 40 from falling into the inside. The connecting frame element 68 may be formed from a metal pipe made of, for example, aluminum.

<Main frame>
Next, the main body frame 15 that supports the seat support unit 40 described above will be described in detail.

  As shown in FIGS. 3 to 7 and FIGS. 11 to 14, the main body frame 15 includes left and right front legs 20 and left and right rear legs 21, and first link elements 22 connected to the corresponding front legs 20 and rear legs 21. A second link element 24 connected to the corresponding first link element 22, a left and right front leg support element 32 connected to the corresponding front leg 20, and a corresponding rear leg 21. A third link element 28. The front leg 20 and the rear leg 21 are connected to the first link element 22 and swingable with respect to the first link element 22 in their upper portions. The first link element 22 is connected to the second link element 24 at a rear portion thereof and is rotatable relative to the second link element 24. The first link element 22 functions as 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 present embodiment, the second link element 24 and the third link element 28 are connected to each other so as to be rotatable relative to each other by the shaft member 13 that passes through the seat support unit 40. In addition, since the shaft member 13 is used, the second link element 24 and the third link element 28 can also rotate relative to the seat support unit 40. 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 seat support unit 40 are in the axial direction of the shaft member 13 extending parallel to the width direction. Relative rotation is possible about da.

  In the present 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 end attached to the lower end portion of the second link body 25. Member 26. The shaft member 13 penetrates the lower part of the second link body 25 covered by the second link end member 26. Therefore, the second link main body 25 and the second link end member 26 are formed with through holes 25a and 26a through which the shaft member 13 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 has 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 the upper end portion of the third link body 29. Yes. The shaft member 13 passes through an upper portion of the third link element 28 covered by the third link end member 30. Accordingly, the third link main body 29 and the third link end member 30 are formed with through holes 29a and 30a extending through the shaft member 13, respectively.

  Then, a second boss 30b provided on the body frame 15 connected to the seat support unit 40 via the shaft member 13 on a circumference centering on the axial direction da of the shaft member 13 and protruding in the axial direction da. Is provided. The boss 30b has a boss surface (outer surface) 30b1 located on the entire circumference or a part of the circumference centering on the axial direction da. A second boss receiver 62b that receives the boss surface 30b1 of the second boss 30b is formed on the sheet support unit 40. The boss receiver 62b has a boss receiving surface 62b1 located on the entire circumference or a part of the circumference centering on the axial direction da of the shaft member 13. When the main body frame 15 and the seat support unit 40 rotate relative to each other, the boss surface 30b1 of the second boss 30b and the boss receiving surface 62b1 of the second boss receiver 62b slide relative to each other. By engaging the second boss 30b and the second boss receiver 62b in this manner, the seat support unit 40 and the main body frame 15 are relatively rotated around the axial direction da of the shaft member 13 regardless of the shaft member 13. It becomes possible to move. Thereby, since the load applied to the shaft member 13 can be distributed to the engaging portions of the boss 30b and the boss receiver 62b, the durability of the baby carriage can be improved. Further, when each boss 30b enters the boss receiver 62b, the seat support unit 40 and the main body frame 15 can be positioned with high accuracy at the time of assembly before being penetrated by the shaft member 13, for example. Unlike the illustrated example, the seat support unit 40 may be provided with a boss and the main body frame 15 may be provided with a boss receiver.

  In the example shown in FIG. 13, the shaft member 13 passes through the second link element 24, the third link element 28, and the seat support unit 40 in this order from the outside in the width direction. The third link end member 30 of the third link element 28 is formed with a boss 30b that protrudes inward in the width direction. The boss 30b protruding inward in the width direction circulates in an annular shape on a circumference centering on the axial direction da of the shaft member 13. A boss receiver 62b that receives the boss 30b is formed in the lower connection portion 62 of the back support portion support element 60 of the seat support unit 40. The boss receiver 62b is formed by the inner surface of a recess that opens outward in the width direction.

  Further, the lower part of the front leg support element 32 is connected to the front leg 20 and is rotatable relative to the front leg 20. Further, the front leg support element 32 is fixed to the seat support unit 40 at an upper portion thereof. In the baby carriage 10 according to the present embodiment, the front leg support element 32 is fixed to the seat surface portion support element 50 of the seat support unit 40. More specifically, each front leg support element 32 is fixed to a side frame portion 52 a on the corresponding side of the seat surface portion support frame 51 constituting the seat surface portion support element 50. As well shown in FIG. 10, the upper end portion of the front leg support element 32 is formed with a support recess 32 a that receives the seat surface portion support frame 51 of the seat surface portion support element 50 from above. With the seat surface support frame 51 disposed inside the support recess 32a, the seat surface support frame 51 and the front leg support element 32 are fixed using, for example, pins. Accordingly, the seating surface support element 50 is supported from below by the front leg support element 32.

  The front leg support element 32 supports an elongated sheet receiving member 33. The sheet receiving member 33 is slidable with respect to the front leg support element 32 along its longitudinal direction. When the sheet receiving member 33 slides relative to the front leg support element 32 and extends forward, the front portion of the seat 150 can be lifted from below. For example, when the back support part 60 of the seat support unit 40 falls and the infant lies on the seat 150, the seat receiving member 33 lifts the front portion of the seat 150 to support the infant's feet. Is possible.

  As shown in FIG. 1, the main body frame 15 includes, as components extending in the width direction, a footrest 17 extending between a pair of front legs 20, a rear connecting member 18 extending between a pair of rear legs 21, and a pair of first legs. A guard member 19 extending between the one link elements 22.

<Handle 70>
A U-shaped handle 70 is swingably connected to the baby carriage body 11 having the above-described configuration. The handle 70 is connected to the corresponding third link element 28 at both ends of the U-shape so as to be rotatable (swingable). In the present embodiment, as shown in FIG. 13, the handle 70 and the baby carriage main body 11 are connected to each other by a shaft member 13 penetrating the baby carriage main body 11 so as to be relatively rotatable. In particular, since the shaft member 13 is used, the handle 70, the second link element 24 of the main body frame 15, the third link element 28, the seat surface support element 50 and the back support part support element 60 of the seat support unit 40 have a width. The shaft member 13 that extends parallel to the direction of the shaft 13 can rotate relative to the axis line da.

  In the present embodiment, the handle 70 includes a handle body 71 formed in a U shape, handle end members 74 provided at both ends of the U shape of the handle body 71, and the handle end member 74 from the width direction. And a first switching member 75 provided adjacently. The handle main body 71 includes a pair of handle main portions 72a each having a handle end member 74 attached to a lower end thereof, and a handle connecting portion 72b extending between the upper ends of the handle main portions 72a. The shaft member 13 passes through a lower portion of the handle main body 71 covered by the handle end member 74 and a first switching member 75 arranged side by side with the handle end member 74 in the width direction. Accordingly, the handle main portion 72a, the handle end member 74, and the first switching member 75 of the handle body 71 are formed with through holes 71a, 74a, and 75a extending through the shaft member 13, respectively.

  The baby carriage main body 11 connected to the handle 70 via the shaft member 13 is provided with a third boss 26b provided on the circumference centering on the axial direction da of the shaft member 13 and protruding in the axial direction da. It has been. The third boss 26b has a boss surface (outer surface) located on the entire circumference or a part of the circumference centering on the axial direction da. The handle 70 is formed with a third boss receiver 75b that receives the boss surface 26b1 of the third boss 26b. The third boss receiver 75 b has a boss receiving surface located on the entire circumference or a part of the circumference centering on the axial direction da of the shaft member 13. When the handle 70 swings relative to the baby carriage body 11, the boss surface 26b1 of the third boss 26b and the boss receiving surface 76b1 of the third boss receiver 75b slide relative to each other. By engaging the third boss 26b and the third boss receiver 75b in this way, the handle 70 swings with respect to the baby carriage body 11 about the axial direction da of the shaft member 13 regardless of the shaft member 13. It becomes possible. Thereby, since the load applied to the shaft member 13 can be distributed to the engaging portions of the boss 26b and the boss receiver 75b, the durability of the baby carriage can be improved. Further, since each boss 26b enters the boss receiver 75b, the handle 70 and the baby carriage main body 11 can be positioned with high accuracy at the time of assembly before being penetrated by the shaft member 13, for example. Unlike the illustrated example, the handle 70 may be provided with a boss, and the baby carriage body 11 may be provided with a boss receiver.

  In the example shown in FIGS. 13 to 15, the shaft member 13 passes through the handle 70, the second link element 24, the third link element 28, and the seat support unit 40 in this order from the outside in the width direction. A boss 26b is formed on the second link end member 26 of the second link element 24 so as to protrude outward in the width direction. The boss 26b protruding outward in the width direction includes a boss receiving surface 26b1 located on a part of the circumference centering on the axial direction da of the shaft member 13. On the other hand, the first switching member 75 of the handle 70 is formed with a boss receiver 75b that receives the boss surface 26b1 of the boss 26b. The boss receiver 75b includes a boss receiving surface 76b1 formed by a recess opened toward the inside in the width direction or an inner surface of the opening. The boss receiving surface 76b1 of the illustrated boss receiver 75b is located on a part of the circumference centering on the axial direction da of the shaft member 13. The length of the boss receiving surface 76b1 along the circumferential direction is longer than the length of the boss surface 26b1 along the circumferential direction. For this reason, when the handle 70 swings with respect to the baby carriage main body 11, the boss 26b can move within the boss receiver 75b.

  As shown in FIGS. 14 and 15, the boss 26 b has a boss surface 26 b 1 positioned on a part of the circumference centered on the axial direction da of the shaft member 13 and the boss surface 26 b 1 along the circumference. It further includes a pair of end faces 26b2 and 26b3 that are located on both sides and are not parallel to the boss face 26b1. In the illustrated example, the end faces 26b2 and 26b3 of the boss 26b are formed in parallel to the radial direction centered on the axial direction da of the shaft member 13. Similarly, the boss receiver 76b is positioned on both sides of the boss receiving surface 76b1 along the circumference together with the boss receiving surface 76b1 positioned on a part of the circumference centering on the axial direction da of the shaft member 13. It further includes a pair of end surfaces 76b2 and 76b3 that are non-parallel to the receiving surface 76b1. In the illustrated example, the end faces 26b2 and 26b3 of the boss receiver 76b are formed in parallel to the radial direction centered on the axial direction da of the shaft member 13. When the handle 70 is positioned at the first position (rear position), one end surface 26b2 of the boss 26b is disposed at a position facing one end surface 76b2 of the boss receiver 75b, and the handle 70 disposed at the first position is located. Further, the backward swing is restricted. On the other hand, when the handle 70 is positioned at the second position (front position), the other end 26b3 of the boss 26b is disposed at a position facing the other end 76b3 of the boss receiver 75b and is disposed at the second position. Further, the forward movement of the handle 70 is restricted.

  The handle 70 has a swing restricting member 73 slidable with respect to the handle 70 along the longitudinal direction of the handle main portion 72 a of the handle main body 71. The swing restricting member 73 can be engaged with a handle fixing pin 37 (see FIGS. 5 and 6) provided on the baby carriage body 11. When the handle fixing pin 37 and the swing restricting member 73 are engaged, the handle 70 is locked at the second position (face pressing position) or the first position (back pressing position).

<< Overall operation and action of baby carriage >>
Next, the overall operation and effects of the baby carriage 10 resulting from the baby carriage body 11 and the handle 70 will be described. First, the baby carriage 10 having the above-described configuration can be folded from the unfolded state shown in FIGS. 1 to 6 into the folded state shown in FIG. During the folding operation, the constituent elements constituting the baby carriage 10 rotate (pivot and swing) with respect to each other about an axis extending in the width direction.

  Specifically, the handle 70 disposed at the first position is once lifted rearward and upward, and then pushed downward to rotate the third link element 28 clockwise with respect to the rear leg 21 in FIG. . In accordance with this operation, the first link element 22 and the seating surface portion support element 50 of the seat support unit 40 are rotated clockwise in FIG. 5 with respect to the second link element 24. By this operation, the handle 70 and the front leg 20 are arranged close to each other in parallel when viewed from the side of the baby carriage 10, and the arrangement position of the handle 70 is lowered. As described above, the baby carriage 10 can be folded, and the size of the baby carriage 10 along the front-rear direction and the vertical direction can be reduced. On the other hand, in order to unfold the baby carriage 10 from the folded state, a procedure reverse to the folding operation described above may be performed. Therefore, in this baby carriage 10, a part of the seat support unit 40 (specifically, a part from the end portion 51a of the side frame portion 52a of the seating surface portion support frame 51 to the fixing position with the front leg support element 32) and the front leg. The support element 32 functions as one link when the baby carriage 10 is folded and when the baby carriage 10 is expanded.

  The baby carriage 10 is provided with a state maintaining mechanism 35 that restricts the operation of the baby carriage 10 from the expanded 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 movement restricting member 35 c is urged toward the third link end member 30 of the third link element 28 and engages with an engagement recess 28 a formed in the third link end member 30, whereby the second link element The relative swinging of 24 and the third link element 28 is restricted, and thereby the operation of the baby carriage 10 from the expanded state to the folded state is restricted. The state maintaining mechanism 35 further includes an operation member 35b that can be engaged with the operation restricting 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 portion 72a along the longitudinal direction of the handle main portion 72a of the handle 70. The remote operation device 35a is provided at the handle connecting portion 72b of the handle 70, and can be remotely operated with respect to the handle main portion 72a of the operation member 35b. By using the remote operation device 35a, the operation restricting member 35c can be operated via the operation member 35b, and the engagement between the operation restricting member 35c and the third link end member 30 can be released. That is, by operating the remote control device 35a, the folding operation of the baby carriage 10 in the unfolded state can be enabled.

  In the baby carriage 10 according to the present embodiment as described above, the back support portion support element 60 is provided with the boss 62a extending on the circumference around the axial direction da of the shaft member 13, and the seat surface portion support element 50 is also provided with the seat support portion 50. The boss receiver 54a for receiving the boss 62a is formed, and the back support section support element 60 is connected to the seat surface section support element 50 by the engagement via the boss 62a and the boss receiver 54a, and the main body of the seat support unit 40 The seating surface support element 50 can swing about the center of rotation with respect to the frame 15. That is, by positioning using the engagement between the boss 62a and the boss receiver 54a, the back support part support element 60 and the seating surface part support element 50 of the seat support unit 40 are easily and accurately connected at a predetermined relative position. can do. Further, the engagement between the boss 62a and the boss receiver 54a allows the back support portion support element 60 and the seat surface portion support element 50 to be kept in a predetermined positional relationship so as to be capable of relative swinging. 13 can be easily assembled to the main body frame 15 of the seat support unit 40. Further, the swinging of the backrest support element 60 is stabilized with respect to the shaft member 13. For this reason, the reclining operation and the folding operation can be performed more stably. Furthermore, since the load applied to the shaft member 13 can be distributed to the engaging portions of the boss 62a and the boss receiver 54a, the durability of the baby carriage 10 can be improved. In particular, such an effect becomes remarkable when the shaft member 13 penetrates more members. In addition, a boss may be provided in the seat surface portion support element 50, and a boss receiver may be provided in the backrest portion support element 60. In this example, the same function and effect can be achieved.

  Furthermore, in manufacturing the baby carriage 10, part or all of the seat support unit 40 can be manufactured in advance, and then the manufactured seat support unit 40 can be attached to the main body frame 15. According to this manufacturing method, it is possible to facilitate, stabilize, and increase the efficiency of the baby carriage 10 as compared with the method of manufacturing the baby carriage by attaching the components in order. However, the present invention does not limit the manufacturing method of the baby carriage 10.

  In the baby carriage 10 according to the present embodiment, the main body frame 15 is provided with the second boss 30b extending on the circumference around the axial direction da of the shaft member 13, and the seat support unit 40 has the second boss 30b. A second boss receiver 62b is formed. Therefore, by positioning using the engagement between the boss 30b and the boss receiver 62b, the main body frame 15 and the seat support unit 40 can be easily and accurately connected at a predetermined relative position. It is possible to easily assemble the seat support unit 40 using the member 13 to the main body frame 15. Further, since the relative rotation between the seat support unit 40 and the main body frame 15 is 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 engagement positions of the boss 30b and the boss receiver 62b, the durability of the baby carriage 10 can be improved. The seat support unit 40 may be provided with a boss, and the main body frame 15 may be provided with a boss receiver. In this example, the same function and effect can be obtained.

  Further, in the baby carriage 10 according to the present embodiment, the baby carriage main body 11 is provided with a third boss extending on the circumference around the axial direction da of the shaft member 13, and the handle 70 receives the third boss 26b. Three boss receptacles are formed. Therefore, by positioning using the engagement between the boss 26b and the boss receiver 75b, the baby carriage body 11 and the handle 70 can be easily and accurately connected at a predetermined relative position. It becomes possible to easily assemble 70 to the baby carriage main body 11 using. Further, since the relative rotation between the handle 70 and the baby carriage body 11 is 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 engagement positions of the boss 26b and the boss receiver 75b, the durability of the baby carriage 10 can be improved. The handle 70 may be provided with a boss and the baby carriage body 11 may be provided with a boss receiver. In this example, the same function and effect can be obtained.

<< Wheel holding unit 100 >>
Next, the wheel holding unit 100 will be described with reference mainly to FIGS. As described above, the wheel holding units 100 attached to the front legs 20 and the rear legs 21 all support the rotating body 110 rotatably holding the wheel 101 and the rotating body 110 about the caster axis Ac. It is comprised as what is called a caster which has the fixed body 105 to perform. The baby carriage 10 can be automatically switched according to the position of the handle 70 so that the rotating body 110 of the wheel holding unit 100 can be switched between a rotatable state and a non-rotatable state with respect to the fixed body 105. A mechanism 88 is provided. As will be described later, the switching mechanism 88 will be described in detail here.

  The pair of front legs 20 may be attached with a wheel holding unit 100 configured similarly or symmetrically. The pair of rear legs 21 may be attached with a wheel holding unit 100 configured similarly or symmetrically. Furthermore, the front leg 20 and the rear leg 21 can be attached with a wheel holding unit 100 configured substantially in the same manner except for the configuration of the mounting portion to the leg. Therefore, here, an example of the wheel holding unit 100 configured as a caster will be described.

  As shown in FIGS. 22 and 23, the wheel holding unit 100 includes a rotating body 110 that rotatably holds the wheel 101 via an axle 113, and a fixed body 105 that rotatably supports the rotating body 110. ,have. The fixed body 105 is fixed to the corresponding front leg 20 or rear leg 21. The rotation axis Ar of the wheel 101 coincides with the axial direction of the axle 113 and extends in the horizontal direction. In the present embodiment, the fixed body 105 supports the support shaft member 108, and the rotating body 110 is supported by the support shaft member 108 that hangs down from the fixed body 105 and is fixed around the axial direction of the support shaft member 108. The body 105 can be rotated.

  22 and 23, the rotating body 110 includes a wheel holder 120 that rotatably supports the wheel 101, a support block 115 that operably supports the wheel holder 120, and the support block 115 and the wheel holder 120. It has the 1st elastic structure 125 and the 2nd elastic structure 127 which are arrange | positioned between. The wheel holder 120 holds the axle 113, and the wheels 101 are held on both sides of the axle 113. In FIG. 23, the wheel is not shown, and in FIG. 22, the wheel on one side is not shown. In the present embodiment, the wheel holder 120 is attached to the support block 115 via the swing shaft member 111 and can swing with respect to the support block 115 with the axial direction of the swing shaft member 111 as the center sc2. ing. Further, in the example shown in FIGS. 22 and 23, the rotating body 110 further includes a braking member 129 that is swingably attached to the wheel holder 120. The brake member 129 has a brake protrusion 129a that protrudes in a direction parallel to the rotation axis Ar. When the brake member 129 swings with respect to the wheel holder 120, the brake protrusion 129a engages with the wheel 101. In this state, the rotation of the wheel 101 around the rotation axis Ar is restricted. The

  The first elastic structure 125 and the second elastic structure 127 are deformed by the operation of the wheel holder 120 with respect to the support block 115. In other words, the first elastic structure 125 and the second elastic structure 127 are deformed to absorb the operation of the wheel holder 120 with respect to the support block 115 and exhibit a suspension function. Here, the elastic structure means a structure that has the property of deforming when receiving an external force and at least partially restoring the original shape when the external force is removed. The elastic structure includes not only a lump of elastic material such as a spring but also a material that structurally exhibits the above-described properties such as a spring or a bag sealed with a gas to be described later. In the wheel holding unit 100 including the two elastic structures 125 and 127, it is preferable that at least one of the following conditions a and b is satisfied from the viewpoint of developing an excellent suspension function. The following conditions a and b are such that the first elastic structure 125 and the second elastic structure 125 and the second elastic structure 127 have different materials, structures, arrangements, deformable amounts, and the like. This can be realized by configuring the structure 127.

Condition a:
When the operation of the wheel holder 120 on the support block 115 starts, first, only the first elastic structure 125 is pressurized and deformed between the wheel holder 120 and the support block 115, and the operation of the wheel holder 120 on the support block 115 is performed. Further, the second elastic structure 127 in addition to the first elastic structure 125 is pressurized and deformed between the wheel holder 120 and the support block 115.
Condition b:
Assuming that only the first elastic structure 125 is disposed between the wheel holder 120 and the support block 115, the first elastic structure 125 is deformed and the wheel holder 120 is moved by a predetermined amount with respect to the support block 115. The magnitude of the force required for operation is that the second elastic structure 127 is deformed on the assumption that only the second elastic structure 127 is disposed between the wheel holder 120 and the support block 115. This is different from the magnitude of the force required to move the wheel holder 120 by a predetermined amount relative to the support block 115.

  Under the condition a, when the wheel holder 120 and the support block 115 are relatively moved, only the first elastic structure 125 is deformed and only the first elastic structure 125 is supported by the wheel holder 120 and the support at the initial stage of the relative operation. Resists relative movement of block 115; On the other hand, when the relative movement of the wheel holder 120 and the support block 115 proceeds, the second elastic structure 127 starts to deform, and the second elastic structure 127 resists the relative movement of the wheel holder 120 and the support block 115. For example, in the initial stage of the relative operation of the wheel holder 120 and the support block 115, the second elastic structure 127 is not in contact with at least one of the wheel holder 120 and the support block 115, and the relative relationship between the wheel holder 120 and the support block 115 is As the operation proceeds, the second elastic structure 127 may come into contact with both the wheel holder 120 and the support block 115. When the second elastic structure 127 resists the relative movement of the wheel holder 120 and the support block 115, the first elastic structure 125 also continues to be deformed along with the operation of the wheel holder 120 and the support block 115, and the second elasticity The structure 127 may resist relative movement of the wheel holder 120 and the support block 115 together with the first elastic structure 125, or the first elastic structure 125 is no longer the wheel holder 120 and the support block 115. It may be possible not to resist the relative movement.

  In the condition b, when the wheel holder 120 and the support block 115 relatively move by a predetermined amount, the resistance against the relative movement of the first elastic structure 125 and when the wheel holder 120 and the support block 115 relatively move by the same amount. Is set so that the drag force against the relative movement of the second elastic structure 127 is different.

  Next, the configuration of the elastic structures 125 and 127 in the illustrated embodiment and the configuration of the rotating body 110 related to the support of the elastic structures 125 and 127 will be described. In the present embodiment, the first elastic structure 125 is constituted by an elastic body 126 itself such as rubber. The illustrated elastic body 126 has a receiving portion 126a formed as a recess. The wheel holder 120 has a support protrusion 121a fitted in the receiving portion 126a. Due to the engagement between the support protrusion 121a and the receiving portion 126a, the first elastic structure 125 made of the elastic body 126 is held by the wheel holder 120. The elastic body 126 is formed in a substantially cylindrical shape, and is arranged such that its longitudinal direction extends between the wheel holder 120 and the support block 115. When the wheel holder 120 swings with respect to the support block 115, the elastic body 126 is compressed along its longitudinal direction. Therefore, the resistance of the first elastic structure 125 against the relative swing between the wheel holder 120 and the support block 115 is substantially constant regardless of the progress of the relative swing between the wheel holder 120 and the support block 115.

  Next, the structure of the 2nd elastic structure 127 and the rotary body 110 which supports the 2nd elastic structure 127 is demonstrated. As shown in FIGS. 22 and 23, the support block 115 of the rotating body 110 has a plate-like support plate portion 116 extending in the vertical direction. On the other hand, the wheel holder 120 of the rotating body 110 includes a holder base 121 pivotally attached to the support block 115 and an upward extending portion 122 that extends upward from the rear of the holder base 121. As shown in FIG. 23, the upward extending portion 122 is disposed at a position facing the support plate portion 116 of the support block 115. Note that the axle 113 for holding the wheel 101 is held in the vicinity of the connection portion between the holder base 121 and the upward extending portion 122 in the wheel holder 120. Further, the above-described braking member 129 is pivotally attached to the upward extending portion 122.

  In the present embodiment, the second elastic structure 127 is formed as a bag in which a gas is sealed. The material forming the bag can be composed of rubber, resin, or the like having extensibility. In the illustrated example, the second elastic structure 127 is formed as a resin bag 128 in which a gas is sealed. 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 via a fastener (not shown). As shown in FIG. 24, the resin bag 128 is generally formed in a cubic shape, and is formed with a recess 128a, a stepped portion 128b, and a fastener receiver 128c.

  The recess 128 a is formed on the surface of the wheel holder 120 that faces the upward extending portion 122. The recess 128a extends linearly in a direction perpendicular to the swing axis sc2 with respect to the support block 115 of the wheel holder 120. Note that a convex portion 123 is formed in the upper extension 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 comes into contact with the concave portion 128a when the wheel holder 120 operates on the support block 115.

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

  Next, the operation and effect of the wheel holding unit 100 in the present embodiment configured as described above will be described.

  First, the wheel holding unit 100 according to the present embodiment includes a first elastic structure 125 and a first elastic structure 125 that are deformed by a relative operation of the wheel holder 120 with respect to the support block 115 between the support block 115 and the wheel holder 120 that are relatively operable. Two elastic structures 127 are provided. When the first elastic structure 125 and the second elastic structure 127 start the above-described condition a, that is, the operation of the wheel holder 120 with respect to the support block 115, first, only the first elastic structure 125 is connected to the wheel holder 120. When the wheel holder 120 is deformed by being pressurized between the support block 115 and the operation of the wheel holder 120 with respect to the support block 115 further proceeds, in addition to the first elastic structure 125, the second elastic structure 127 also includes the wheel holder 120 and the support block. It is preferable that it is deformed by being pressurized with respect to 115. In such a baby carriage 10, when the load on the baby carriage 10 is small, for example, when the baby who is riding on the baby carriage is low in age and has no baggage in the car 90, the first elastic structure 127 is used during traveling. Effectively absorbs vibrations and shocks, and exhibits an excellent suspension function. On the other hand, when the load on the baby carriage 10 is large, for example, when an infant riding on the baby carriage 10 is older and has a heavy load in the car 90, the first elastic structure 125 is separated from the first elastic structure 125. 2 suspension structure 127 or both the first and second elastic structures 125 and 127 stably support the load and effectively absorb vibrations and shocks during running, and thus an excellent suspension Function can be demonstrated. In other words, the baby carriage 10 can be provided with an excellent ride comfort regardless of the load on the baby carriage 10.

  Further, it is assumed that the first elastic structure 125 and the second elastic structure 127 are in the condition b described above, that is, only the first elastic structure 125 is disposed between the wheel holder 120 and the support block 115. The magnitude of the force required to deform the first elastic structure 125 and move the wheel holder 120 relative to the support block 115 by a predetermined amount is between the wheel holder 120 and the support block 115. Assuming that only the elastic structure 127 is disposed, the second elastic structure 127 is deformed to be different from the magnitude of force required to operate the wheel holder 120 with respect to the support block 115 by the same amount. Preferably it is. That is, the resistance of the first elastic structure 125 to the relative movement between the wheel holder 120 and the support block 115 is different from the resistance of the second elastic structure 127 to the relative movement between the wheel holder 120 and the support block 115. Is preferred. In such a baby carriage 10, the first elastic structure 125 and the second elastic structure body are different so that the first elastic structure body 125 and the second elastic structure body 127 have different materials, structures, arrangements, deformable amounts, and the like. By appropriately designing 127, a desired suspension function can be imparted to the wheel holding unit 100 with a high degree of design freedom.

  Further, the first elastic structure 125 and the second elastic structure 127 may satisfy both the condition a and the condition b described above. As an example, the drag of the first elastic structure 125 against the relative movement between the wheel holder 120 and the support block 115 is smaller than the drag of the second elastic structure 127 against the relative movement between the wheel holder 120 and the support block 115. When the load on the baby carriage 10 is small, the load is stably supported by the first elastic structure 125 and the first elastic structure 125 can effectively absorb vibration and impact during traveling. Can do. When the load on the baby carriage 10 is large, the load is more stably supported by the first elastic structure 125 or by the first elastic structure 125 and the second elastic structure 127 and at the time of traveling. Vibration and shock can be absorbed effectively. Therefore, it is possible to very effectively eliminate the influence of the load on the baby carriage 10 and to give the baby carriage 10 an excellent ride comfort.

  In the above-described embodiment, the second elastic structure 127 is configured as a bag 128 in which gas is sealed. By adjusting the shape of the bag 128 and the filling amount of the gas, the second elastic structure 127 as described above optimizes the drag of the second elastic structure 127, in particular, the change in the drag accompanying the progress of the change. You can also Thereby, a desired suspension function can be imparted to the wheel holding unit with a high degree of design freedom.

  Furthermore, in the above-described embodiment, the recess 128 a that extends linearly is formed in the bag 128 that forms the second elastic structure 127. Then, one of the wheel holder 120 and the support block 115 supports the bag 128 such that the recess 128a extends perpendicular to the swing axis sc2 of the wheel holder 120 with respect to the support block 115, and the wheel holder 120 and the support block 115. The other has a convex portion 123 that is positioned in the concave portion 128 a when the wheel holder 120 and the support block 115 are relatively moved. Since the second elastic structure 127 is a bag 128 in which gas is sealed, it can be deformed in various directions. However, the engagement between the concave portion 128a and the convex portion 123 causes the other of the wheel holder 120 and the support block 115 to be deformed. The deformable second elastic structure 127 is maintained in a predetermined positional relationship, and the bag 128 performs the planned deformation. Thereby, the expected suspension effect can be ensured. Further, before the operation of the wheel holder 120 with respect to the support block 115, the second elastic structure 127 that can deform the other of the wheel holder 120 and the support block 115 is in a non-contact state, and the other of the wheel holder and the support block Even if the deformable second elastic structure 127 is not directly connected, the second elastic structure can be deformed with the other of the wheel holder 120 and the support block 115 by the engagement of the recess 128a and the protrusion 123. 127 is maintained at a predetermined position, and the expected suspension effect can be stably secured.

  Further, in the above-described embodiment, the displacement of the bag 128 on the support plate portion 116 of the support block 115 is regulated by the engagement between the step portion 128b and the step portion 117, and the resin bag in an unintended direction. The deformation of 128 is suppressed. As a result, the second elastic structure 127 made of the bag 128 can exhibit the expected suspension effect. Furthermore, in the embodiment described above, the fastener receiver 128c having a step (rib) portion is formed on the bag 128 forming the second elastic structure 127. Due to the fastener receiver 128c, the bag 128 has a direction in which it is difficult to be deformed. As a result, the deformation of the bag 128 becomes substantially constant when the wheel holder 120 and the support block 115 are moved relative to each other. Will be expressed.

  When the second elastic structure 127 is configured as a bag 128 in which gas is sealed, when the wheel holder 120 operates with respect to the support block 110, one of the wheel holder 120 and the support block 110 has the bag 128. It is preferable to start contact with the bag 128 at the corners formed at. The second elastic structure 127 composed of the bag 128 in which the gas is sealed has the corner portion of the bag 128 exhibiting excellent resistance to deformation, while the corner portion of the second support structure supports the wheel holder 120 once the deformation starts. It can be flexibly deformed to absorb the motion to the block 110 sensitively. Therefore, the expected load on the baby carriage 10 can be stably supported by the second elastic structure 127, and further, the second elastic structure 127 supporting the load can be subjected to shock and vibration. It is possible to exhibit a suspension function that absorbs effectively.

  The elastic structures 125 and 127 are not limited to the case of the bag 128 in which the gas is sealed. The elastic structures 125 and 127 are resistant to the relative movement between the wheel holder 120 and the support block 115. After the start of deformation, it may be changed instead of being constant. Even in such an example, by appropriately setting the resistance of the elastic structures 125 and 127 against relative motion between the wheel holder 120 and the support block 115, the stroller 10 is excellent regardless of the loading load on the stroller 10. Riding comfort can be imparted.

  Further, when at least one of the elastic structures 125 and 127 is exposed, the suspension function can be visually associated with the child's guardian. In particular, the second elastic structure 127 made of the bag 128 sealed with gas can be strongly associated with the suspension function. In particular, when the bag 128 is transparent or translucent, the suspension function is more strongly associated. be able to.

  In the present embodiment, the wheel holding unit 100 is configured as a caster and the rotating body 110 is rotatable with respect to the fixed body 105, but is not limited thereto. The first switching member 75 and the second switching member 80 are also applied to the wheel holding unit in which the rotating body 110 and the fixed body 105 are capable of relative rotation, that is, the wheel 101 cannot be turned. In addition, the above-described effects resulting from the first switching member 75 and the second switching member 80 can be obtained. Moreover, although the wheel holding unit 100 has shown the example which has both the 1st switching member 75 and the 2nd switching member 80 in this Embodiment, it is not restricted to this. The wheel holding unit 100 may have only the second switching member 80, and in this example as well, the above-described operational effects resulting from only the second switching member 80 can be obtained.

<< Switching mechanism >>
Next, the switching mechanism 88 will be described.

<Overall configuration of switching mechanism>
As described above, the switching mechanism 88 is a mechanism that automatically switches between a state in which the rotating body 110 of the wheel holding unit 100 can rotate with respect to the fixed body 105 and a state in which the rotating body 110 cannot rotate. It is. In particular, in this embodiment, the front leg 20 and the rear leg 21 are all provided with a wheel holding unit 100 configured as a caster, and the switching mechanism 88 is positioned on the front side in the traveling direction according to the position of the handle 70. Rotation of the wheel holding unit 100 attached to the leg positioned on the rear side in the advancing direction is possible with respect to the fixed body 105 of the rotating body 110 of the wheel holding unit 100 attached to the leg. The rotation of the body 110 around the caster axis Ac with respect to the fixed body 105 is restricted. More specifically, the switching mechanism 88 holds the wheel attached to the front leg 20 in a state where the handle 70 is disposed at the first position (rear pushing position) shown in FIGS. The rotation of the rotating body 110 with respect to the fixed body 105 in the unit 100 is enabled, and the rotation of the rotating body 110 with respect to the fixed body 105 in the wheel holding unit 100 attached to the rear leg 21 is restricted. On the other hand, the switching mechanism 88 rotates in the wheel holding unit 100 attached to the front leg 20 in a state where the handle 70 is disposed at the second position (facing pressing position) shown in FIGS. While restricting the rotation of the body 110 relative to the fixed body 105, the rotation of the rotating body 110 relative to the fixed body 105 in the wheel holding unit 100 attached to the rear leg 21 is enabled.

  The switching mechanism 88 is provided on the handle 70 and is operable with the swing of the handle 70, and a first switching member 75 supported by the rear leg 21 and operable with the operation of the first switching member 75. 2 has a switching member 80, a lock member 130 provided in the wheel holding unit 100, and a transmission means 87 for transmitting the operation of the second switching member 80 to the lock member 130.

  Among these, the first switching member 75 constitutes a part of the handle 70 as described above. Therefore, in the first switching member 75, the handle 70 swings between the first position shown in FIGS. 1, 3, and 5 and the second position shown in FIGS. At this time, it moves around the swing axis of the handle 70, that is, rotates or revolves. In the present embodiment, the swing axis da of the handle 70 coincides with the axial direction da of the shaft member 13 that supports the handle 70 so as to be swingable. In the present embodiment, as shown in FIGS. 11 to 14, since the first switching member 75 is also penetrated through the shaft member 13, the first switching member 75 is moved along with the swinging of the handle 70. Is pivoted about the swing axis da. The second switching member 80 is disposed at a position on the rear leg 21 that is above the first switching member 75. The second switching member 80 can slide on the rear leg 21.

  The first switching member 75 has a cam contact surface 76 that comes into contact with the second switching member 80 when operating with the swing of the handle 70. On the other hand, the second switching member 80 has a cam receiving piece 81 that receives the cam contact surface 76. In the present embodiment, not only gravity but also an urging member 85 is built in, for example, the rear leg 21 (see FIG. 19), and the second switching member 80 is connected to the rear leg 21 via a relay member 83 described later. It is energizing downward along. By biasing from the biasing member 85, the cam receiving piece 81 of the second switching member 80 and the cam contact surface 76 of the first switching member 75 can be maintained in contact with each other. In the present embodiment, as the handle 70 swings, the position of the cam contact surface 76 that contacts the cam receiving piece 81 changes, thereby resisting the biasing force of the biasing member 85. Thus, the second switching member 80 slides on the rear leg 21.

  As shown in FIGS. 17 to 19, in the present embodiment, as the handle 70 moves from the first position to the second position, the portion of the cam contact surface 76 that comes into contact with the cam receiving piece 81 is: In the side view of the baby carriage 10, the baby carriage 10 is separated from the swing axis da. For this reason, when the handle 70 is swung from the first position to the second position, the second switching member 80 slides upward on the rear leg 21. Conversely, when the handle 70 is swung from the second position to the first position, the second switching member 80 slides downward on the rear leg 21.

  The cam contact surface 76 of the first switching member 75 and the cam receiving piece 81 of the second switching member 80 are devised mainly for downsizing 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 as the second switching member 80 slides is provided in the wheel holding unit 100. As described above, the wheel holding unit 100 is attached to at least one of the wheel 101, the rotating body 110 that rotatably supports the wheel 101, the front leg 20, and the rear leg 21, and is centered on the caster axis Ac. And a fixed body 105 that rotatably supports the rotating body 110. Further, as shown in FIGS. 25 and 26, the lock member 130 is a view that enables the rotation of the rotating body 110 with respect to the fixed body 105 and the locking position of FIG. It is possible to move between 25 unlock positions. Therefore, the switching mechanism 88 of the present embodiment moves the lock member 130 from the unlock position to the lock position or from the lock position to the lock release position in accordance with the swing of the handle 70 relative to the baby carriage body 11. Yes.

  The lock member 130 is devised to stabilize its operation. The structure of the lock member 130 and the wheel holding unit 100 that holds the lock member 130 will be described in detail later.

  Next, the transmission means 87 will be described. The transmission means 87 is provided between the second switching member 80 and the wheel holding unit 100, and transmits the sliding operation of the second switching member 80 to the lock member 130 of the wheel holding unit 100. Is configured to operate between a locked position and an unlocked position. In the present 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 within the rear leg 21 in synchronization with the sliding of the second switching member 80 with respect to the rear leg 21. The transmission means 87 includes a wire member 87b having one end attached to the relay member 83 and the other end attached to the lock member 130, and a tubular member 87a in which the wire member 87b extends through the inside. ing. As shown in FIG. 19, one end of the cylindrical member 87a is held by a holding portion 84 provided at a position near the relay member 83 in the rear leg 21, and the other end of the cylindrical member 87a is shown in FIG. And as shown in FIG. 26, it hold | maintains at the holding | maintenance part 107 provided in the position used as the vicinity of the locking member 130 of the wheel holding | maintenance unit 100. As shown in FIG. As a result, when the second switching member 80 slides with respect to the rear leg 21, the wire member 87b moves in the cylindrical member 87a, and the lock member 130 connected to the other end of the wire member 87b becomes the wire member 87b. Move with movement.

  In the present embodiment, as described above, the wheel holding unit 100 that functions as a caster is attached to both the front leg 20 and the rear leg 21. Accordingly, as shown in FIG. 5, one transmission means 87 is provided between the relay member 83 and the front leg wheel holding unit 100, and the other is provided between the relay member 83 and the rear leg wheel holding unit 100. One transmission means 87 is provided. In addition, as described above, the baby carriage 10 in the present embodiment is generally configured to be bilaterally symmetric about a plane extending in the front-rear direction with the center in the width direction. Therefore, the first switching member 75, the second switching member 80 and the relay member 83 that form the switching mechanism 88, the front leg transmission means 87, the front leg wheel holding unit 100, the rear leg transmission means 87, and the rear The leg wheel holding unit 100 is also provided on the left and right.

<Cam contact surface of first switching member and cam receiving piece of second switching member>
Here, 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 with reference mainly to FIGS.

  As described above, as the handle 70 swings, the position of the cam contact surface 76 that contacts the cam receiving piece 81 changes, so that the biasing member 85 presses the first switch member 75 toward the first switching member 75. The second switching member 80 thus slid on the rear leg 21. As shown in FIGS. 17 to 19, in the present embodiment, as the handle 70 moves from the first position to the second position, the portion of the cam contact surface 76 that comes into contact with the cam receiving piece 81 is: In the side view of the baby carriage 10, the baby carriage 10 is separated from the swing axis da. For this reason, when the handle 70 is swung from the first position to the second position, the second switching member 80 slides upward on the rear leg 21. Conversely, when the handle 70 is swung from the second position to the first position, the second switching member 80 slides downward on the rear leg 21.

  In the present embodiment, the position of the cam receiving piece 81 that comes into contact with the cam contact surface 76 also changes as the handle 70 swings. As shown in FIGS. 17 to 21, when the handle 70 swings in a certain direction with respect to the baby carriage body 11, the position where the handle 70 comes into contact with the cam contact surface 76 of the cam receiving piece 81 is the cam. It changes from the upstream side to the downstream side in the movement path of the contact surface 76. That is, the position of the cam receiving piece 81 that comes into contact with the cam contact surface 76 moves in the same fixed direction as the cam contact surface 76 that operates with the handle 70. According to the present embodiment, in the state where the handle 70 is disposed at the first position as shown in FIG. 17, the cam contact surface 76 of the first switching member 75 is moved from the first position. 21 is disposed at a position facing only a part of the portion of the cam receiving piece 81 of the second switching member 80 that comes into contact while swinging to the second position, and as shown in FIG. In the state of being arranged at the two positions, the cam contact surface 76 faces only a part of the portion of the cam receiving piece 81 that comes into contact while the handle 70 swings from the first position to the second position. It can be arranged in a position.

  That is, when the position of the cam receiving piece 81 that comes into contact with the cam contact surface 76 does not change, for example, the first switching member 75 further includes a portion indicated by a two-dot chain line in FIG. Thus, it is necessary to make the cam contact surface 76 of the first switching member 75 longer. Therefore, according to the present embodiment, the first switching member 75 of the switching mechanism 88 that is easily complicated can be reduced in size and weight, and as a result, the baby carriage 10 can be reduced in size and weight. In particular, in the vicinity of the swing axis da of the handle 70, a configuration related to the folding operation of the baby carriage 10, the reclining operation of the seat support unit 40 and the seat 150, and the like are arranged, and there is little space margin. As shown in FIG. 12, the operation member 35b of the state maintaining mechanism 35 is provided immediately behind the first switching member 75. In the illustrated example, interference with the operation member 35b occurs, so that it is substantially impossible to provide an extended portion indicated by a two-dot chain line in FIG. That is, the configuration of the cam contact surface 76 and the cam receiving piece 81 in the present embodiment can improve not only the size and weight of the baby carriage 10 but also the overall design freedom of the baby carriage 10.

  As a specific example of such a configuration, the cam receiving piece 81 of the second switching member 80 may be configured by a surface, more specifically, a curved surface, a flat surface, a bent surface, or the like, similar to the cam contact surface 76. On the other hand, as in the illustrated example, the cam receiving piece 81 of the second switching member 80 protrudes toward the cam contact surface 76 of the first switching member 75. At least two cam receiving protrusions 82a and 82b You may make it have. The cam receiving protrusions 82a and 82b are arranged at positions separated along the movement path of the cam contact surface 76 accompanying the swing of the handle 70, and the cam contact surface 76 according to the swing position of the handle 70. The cam receiving protrusions 82a and 82b that come into contact with the sway can change. The design and manufacture of the cam receiving piece 81 having the cam receiving protrusions 82a and 82b requires high accuracy only for the positions of the cam receiving protrusions 82a and 82b, not the entire cam receiving piece 81. Therefore, the cam receiving piece 81 can be easily manufactured.

  In the illustrated example, the cam receiving protrusions 82a and 82b are formed by a single cam receiving piece 81 extending linearly, but the cam receiving protruding parts 82a and 82b are provided separately. Also good.

  Further, when the handle 70 is disposed at a certain position between the first position and the second position, the cam contact surface 76 is adjacent to the two cams along the movement path of the cam contact surface 76. It is preferable that the receiving protrusions 82a and 82b are in contact with each other at the same time. As described above, in the present embodiment, the second switching member 80 is urged toward the first switching member 75 by the urging member 85. On the other hand, the cam receiving protrusions 82a and 82b that come into contact with the cam contact surface 76 of the cam receiving piece 81 are accompanied by the movement of the cam contact surface 76 operating together with the handle 70 in a certain direction. Change. Therefore, by providing a timing at which the cam contact surface 76 contacts the two adjacent cam receiving protrusions 82a and 82b at the same time, the cam receiving protrusions 82a and 82b that contact the cam contact surface 76 are changed. It is possible to avoid the first switching member 75 and the second switching member 80 from colliding with each other by the biasing member 85. The handle 70 swings in one direction within the swingable range and swings in the other direction, that is, when the handle 70 moves from the first position to the second position, and In either case of moving from the second position to the first position, an impact caused by the collision of the cam receiving protrusions 82a and 82b with the cam contact surface 76, or the cam receiving protrusions 82a and 82b is the end of the cam contact surface 76. A smooth swinging operation of the handle 70 can be ensured without causing an impact caused by contacting and getting over the portions 76a and 76b.

  In particular, in the illustrated embodiment, the cam receiving piece 81 of the second switching member 80 is two cam receiving protrusions 82a and 82b, and the handle 70 moves from the first position to the second position. The first cam receiving protrusion 82a is located on the upstream side of the moving path of the cam contact surface 76, and the second cam receiving protrusion 82b is located on the downstream side. Then, in the state where the handle 70 shown in FIG. 17 is disposed at the first position, the cam contact surface 76 is the first cam receiver of the first cam receiver protrusion 82a and the second cam receiver protrusion 82b. It faces only the protrusion 82a and contacts 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 contact surface 76 is the second cam receiver of the first cam receiver protrusion 82a and the second cam receiver protrusion 82b. It faces only the protrusion 82b and is in contact with the second cam receiving protrusion 82b. According to this embodiment, the position of the cam receiving piece 81 that contacts the cam contact surface 76 changes following the movement of the cam contact surface 76. Can be shortened. That is, the first switching member 75 of the switching mechanism 88 that is likely to be complicated can be reduced in size and weight, and as a result, the baby carriage 10 can be reduced in size and weight. In addition, the configuration of the cam contact surface 76 and the cam receiving piece 81 in the present embodiment can improve the overall design freedom of the baby carriage 10 as described above.

  Further, according to the present embodiment, when the handle 70 is disposed at the first intermediate position shown in FIG. 18 located between the first position in FIG. 17 and the second position in FIG. The contact surface 76 faces both the first cam receiving protrusion 82a and the second cam receiving protrusion 86b and is in contact with only the first cam receiving protrusion 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 position in FIG. It faces both the cam receiving protrusion 82a and the second cam receiving protrusion 82b and is in contact with only the second cam receiving protrusion 82b. According to this embodiment, it is possible to provide a timing at which the cam contact surface 76 simultaneously contacts two adjacent cam receiving protrusions 82a and 82b. 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 abutment surface 76 protrudes from the first cam receiver. It can be made to contact both the part 82a and the 2nd cam receiving protrusion 82b. According to the present embodiment, as described above, when the cam receiving protrusions 82a and 82b that come into contact with the cam contact surface 76 are changed, the cam contact surfaces 76 of the cam receiving protrusions 82a and 82b are moved to. Smooth swinging operation of the handle 70 is ensured without causing an impact caused by the collision of the cam and the cam receiving protrusions 82a and 82b coming into contact with and overcoming the end portions 76a and 76b of the cam contact surface 76. be able to.

  In order to realize the cam contact surface 76 and the cam receiving piece 81 as described above, in this embodiment, when the handle 70 is observed along the swing axis da with respect to the baby carriage main body 11, the baby carriage main body of the handle 70 is obtained. 11, the linear distance La from the swing axis da to each position of the cam contact surface 76 is on the cam contact surface 76 on the front side in the movement direction when the handle 70 swings from the first position to the second position. When the handle 70 is disposed at the second position shown in FIG. 21, the length gradually increases from the one end 76a to the other end 76b on the cam contact surface on the rear side in the movement direction. The linear distance Lb from the swing axis da of the handle 70 to the baby carriage body 11 to the second cam receiver protrusion 82b is from the swing axis da of the handle 70 to the baby carriage body 11 to the first cam receiver protrusion 82a. It is shorter than the straight line distance Lc.

  Further, in this embodiment, the linear distance from the swing axis da of the handle 70 to the baby carriage body 11 to each position of the cam contact surface 71 when observed along the swing axis da of the handle 70 to the baby carriage body 11. La is a cam contact on the rear side in the movement direction from one end 76a on the cam contact surface 76 on the front side in the movement direction when the handle 70 is swung from one side to the other side within the swingable range. As shown in FIG. 16, the width w of the cam contact surface 76 along the direction parallel to the swing axis da of the handle 70 is gradually increased toward the other end 76b on the contact surface. Then, it gradually spreads from one end 76a on the cam contact surface 76 toward the other end 76b on the cam contact surface 76 which is the rear side in the movement direction. According to such an embodiment, the width w of the cam abutment surface 76 is widened at a position on the cam abutment surface 76 where the linear distance La from the swing axis da of the handle 70 in a side view is long. . When the linear distance La from the swing axis da of the handle 70 to a certain position on the cam contact surface 76 is increased, the cam receiving piece is brought into contact with the cam receiving piece 81 when the position of the cam contact surface 76 contacts the cam receiving piece 81. The urging force from the urging member 85 that urges 81 toward the cam contact surface 76 becomes larger. And since the width w of the cam contact surface 76 at a position where the linear distance La from the swing axis da of the handle 70 becomes longer, a larger urging force from the urging member 85 is applied to the cam contact surface. It can be received at a wider portion of the surface 76. That is, the first switching member 75 and the baby carriage 10 can be reduced in size and weight without increasing the size of the cam contact surface 76 more than necessary. Further, the relative operation of the first switching member 75 and the second switching member 80 accompanying the swinging of the handle 70 can be further smoothed.

<Lock member and wheel holding unit>
Next, with reference to mainly FIGS. 25 to 27, portions of the shaft member 130 and the wheel holding unit 100 related to the lock member 130 will be described.

  As described above, the lock member 130 includes the lock position shown in FIG. 26 that restricts the rotation of the rotating body 110 relative to the fixed body 105, and the unlock position shown in FIG. 25 that enables the rotation of the rotating body 110 relative to the fixed body 105. It is possible to move between. As shown in FIGS. 25 and 26, the fixed body 105 is formed with an accommodating portion 106 that extends in one direction and opens to one side in the one direction facing 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, an engagement recess 114 is formed in the support block 115 of the rotating body 110 at a position where it can face the housing portion 106 of the fixed body 105 in one direction.

  The lock member 130 is disposed in the accommodating portion 106 so that its longitudinal direction is along one direction, and is slidable in the accommodating portion 106. The position where the lock member 130 has moved to the other side in one direction within the accommodating portion 106 is the unlock position shown in FIG. 25, and the lock member 130 is fixed to the fixed body 105 over its entire length at the unlock position. It is located in the accommodating part 106 of the. Therefore, when the lock member 130 is in the unlock 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 accommodating portion 106 is the lock position shown in FIG. 26, and one end of the lock member 130 is at the accommodating portion 106 in the locked position. Extend outside. At this time, one side end of the lock member 130 extends into the engagement recess 114 of the rotating body 110. Therefore, when the lock member 130 is in the lock position, the lock member 130 restricts the rotation of the rotating body 110 relative to the fixed body 105.

  As shown in FIGS. 25 and 26, the compression spring 103 is disposed at a position on one side of the lock member 130 in the housing portion 106 of the fixed body 105. The compression spring 103 is compressed between one end face of the housing portion 106 and the lock member 130, and thereby urges the lock member 130 from one side to the other side in one direction. As described above, the wire member 87 b of the transmission means 87 is connected to the lock member 130. Then, as the handle 70 swings, the wire member 87b moves and the lock member 130 is pulled up against the urging force of the compression spring 103, whereby the lock member 130 moves from the lock position to the lock release position. On the other hand, the wire member 87b moves as the handle 70 swings, and the lock member 130 is pushed down by the urging force of the compression spring 103, whereby the lock member 130 moves from the unlocked position to the locked position.

  By the way, the lock member 130 in the present embodiment includes a spring receiving surface 131a that receives one side end in one direction of the compression spring 103. In addition, the lock member 130 is in one direction more than the spring receiving surface 131a. On the other side, it has a spring side extension part 135 located on the side of the extension compression spring 103. As shown in FIG. 25, when the lock member 130 is slid to one side in one direction in the accommodating portion 106 and is in the unlocked position, the length of the spring-side extending portion 135 is the same as that of the spring receiving surface 131a. It is slightly shorter than the length of the compression spring 103 compressed between one side end face of the portion 106. Such a lock member 130 can increase the total length without increasing the length in one direction of the accommodating portion 106 by using the region where the compression spring 103 is disposed. That is, the lock member 130 can be lengthened without increasing the size and weight of the wheel holding unit 100. Even if a gap is provided between the lock member 130 and the housing portion 106 to ensure the sliding of the lock member 130 by elongating the lock member 130, the lock member in the housing portion 106 is provided. The backlash of 130 can be effectively suppressed, and the smooth sliding operation of the lock member 130 can be realized. 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 the present embodiment, as shown in FIG. 27, the spring-side extending portion 135 has a pair of side wall portions 136 and a connecting wall portion 137 that connects the pair of side wall portions 136. . A portion on one side of the compression spring 103 in at least one direction is surrounded from three sides by the spring-side extension portion 135. Therefore, the compression and expansion of the compression spring 103 that accompanies the sliding of the lock member 130 within the accommodating portion 106 is induced by the spring-side extension portion 135. As a result, the sliding operation of the lock member 130 within the accommodating portion 106 is further stabilized. For example, when the lock member 130 moves from the lock position to the lock release position, the compression spring 103 receives a compression force. At this time, the compression spring 103 bends and protrudes in a direction perpendicular to one direction. This can also be effectively prevented. As a result, the sliding operation of the lock member 130 within the accommodating portion 106 is further stabilized.

  Furthermore, in the present embodiment, as shown in FIGS. 25 to 27, the lock member 130 is connected to the base 131 and the base 131 that forms the spring receiving surface 131 a and is connected to the spring-side extension 135. And a wheel-side extension 141 that extends to one side in one direction from the base 131. The end of the wire member 87 b of the transmission means 87 is attached to the base 131. Further, the wheel side extension 141 has a pair of side walls 142 and a connecting wall 143 that connects the pair of side walls 142. Such a locking member 130 can ensure weight reduction while realizing smooth sliding in the accommodating portion 106 by securing the entire length thereof.

  Furthermore, according to the present embodiment, as shown in FIGS. 25 to 27, the wheel side extending portion 141 has a tapered end taper portion 141 a at one side end in one direction. According to such a lock member 130, one side end of the lock member 130 extends from the housing portion 106 of the fixed body 105 and can smoothly enter the engagement recess 114 of the rotating body 110. That is, the sliding of the lock member 130 from the unlocked position to the locked position can be made smoother.

  Furthermore, according to the present embodiment, as shown in FIGS. 25 to 27, in addition to the tip tapered portion 141 a in the wheel side extending portion 141 of the lock member 130, the engaging recess 114 is provided at one side end in one direction. Further, the taper has a tapered bottom taper portion 114a. According to such a wheel holding unit 100, the locking member 130 and the engaging recess when the locking member 130 is in the locking position while facilitating the sliding of the locking member 130 from the unlocking position to the locking position. The gap with 114 can be reduced. Therefore, it is possible to smoothly shift from a state in which the rotating body 110 can rotate with respect to the fixed body 105 to a state in which the rotation of the rotating body 110 with respect to the fixed body 105 is restricted, and thereafter, the fixed body 105 of the rotating body 110. It is possible to effectively prevent rattling against. Thereby, the stable driving | running | working of the baby carriage 10 is realizable.

  Furthermore, according to the present embodiment, as shown in FIGS. 25 to 27, the compression spring 103 is a compression coil spring, and one end portion of the base portion 131 of the lock member 130 forming the spring receiving surface 131a. A wire member 87 b attached with a wire extends through the compression coil spring 103. According to such a wheel holding unit 100, the compression and expansion of the compression coil spring 103 that accompanies the sliding of the lock member 130 within the housing portion 106 is induced by the wire member 87 b and the spring side extension portion 135. . Therefore, the sliding operation within the accommodating portion of the lock member 130 is further stabilized.

  In the present embodiment, the lock member 130 is automatically operated in accordance with the operation of the handle 70 via the transmission unit. However, the present invention is not limited to this, and the lock member 130 is related to the lock member 130 and the lock member 130. The configuration of the wheel holding unit 100 to be applied can be applied to a manually operated wheel holding unit. In such an example, the lock member 130 and the configuration of the wheel holding unit 100 related to the lock member 130 described above are also used. An effect can be produced.

<< Sheet 150 >>
Next, the sheet 150 supported on the sheet support unit 40 will be described mainly with reference to FIGS. 1, 2, and 28 to 30. As well shown in FIG. 28, the seat 150 is generally symmetric with respect to the center plane in the width direction extending along the front-rear direction.

  As shown in FIGS. 1, 2 and 28 to 30, the seat 150 includes a seat surface portion 156, a backrest portion 157 connected to the seat surface portion 156 and positioned behind the seat surface portion 156, and the seat surface portion 156. Left and right side surface portions 160 extending to both sides and left and right upper side surface portions 167 extending from the backrest portion 157 are provided. The seat surface portion 156 mainly supports the buttocks of the baby who rides on the baby carriage 10. On the other hand, the back pad 157 is arranged 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 seat 150 further includes an upper portion 169 connected to an upper position separated from the seat surface portion 156 of the backrest portion 157. As shown in FIG. 4, the upper portion 169 connects the left and right upper side surface portions 167 and functions as a headrest.

  As described above, the seat surface portion 156 is mainly supported by the seat surface portion support element 50 of the seat support unit 40. As shown in FIG. 28, the seat surface portion 156 is connected to the backrest portion 157 at the rear edge portion, and is connected to the corresponding side surface portion 160 at the pair of side edge portions. The back rest 157 is mainly supported by the back rest support element 60 of the seat support unit 40. As shown in FIG. 28, the back pad 157 has a shape formed by chamfering one short side of the rectangular shape so as to have a curved shape in a plan view. The backrest 157 is arranged such that the edge shaped in the curved shape is separated from the seat surface 156 rearward or upward.

  The back pad portion 157 is connected to the rear edge portion of the seat surface portion 156 at the lower edge portion thereof. The back rest 157 and the seat surface 156 are connected to each other by, for example, sewing, and in this case, the connection portion between the back rest 157 and the seat surface 156 is defined by a sewing line extending linearly. With the reclining operation and folding operation of the baby carriage main body 11, the seat surface portion 156 and the backrest portion 157 of the seat 150 come closer to each other. At this time, the seat surface portion 156 and the backrest portion 157 can swing relatively with a linear connection portion formed by a sewing line as a swing axis.

  Each upper side surface portion 167 is connected to a pair of linear side edges of the backrest portion 157. Further, an upper portion 169 functioning as a headrest is connected to the curved upper edge portion of the backrest portion 157. The pair of upper side surface portions 167 is supported by the side support elements 45 of the seat support unit 40, and the upper portion 169 is supported by the upper support elements 41 of the seat support unit 40. In the example shown in FIG. 28, the pair of upper side surface portion 167 and upper portion 169 are integrally formed of the same material. In this example, the pair of upper side surface portions 167 and the upper portion 169 are connected to the backrest portion 157 by sewing, for example. In this case, the connection part of the upper side part 167 and the upper part 169, and the backrest part 157 is defined by the sewing line extended in a substantially U shape. As described above, the upper support element 41 can swing with respect to the backrest support element 60. As the upper support element 41 swings with respect to the back support section support element 60, the upper section 169 swings with respect to the back support section 157 using a linear connection portion formed of a sewing line as a swing axis. Become.

  On the other hand, as can be understood from FIGS. 1 and 2, the side support elements 45 are maintained in a standing state with respect to the surface defined by the back support section support elements 60, regardless of the reclining operation. . Therefore, regardless of the reclining operation, the upper side surface portion 167 supported by the side support elements 45 stands on the side of the infant leaning against the backrest portion 157. The upper side surface portion 167 has a wide width at the upper side where the upper side surface portion 167 is located on the side of the infant's head. On the other hand, it has a narrow width in the lower part approaching the seat surface part 156, and is configured not to obstruct the approach between the seat surface part 156 and the backrest part 157, as can be understood from FIGS. .

  The seat surface portion 156, the backrest portion 157, the upper side surface portion 167, and the upper portion 169 can directly contact an infant who rides on the baby carriage 10. For this reason, the seat surface portion 156, the backrest portion 157, the upper side surface portion 167, and the upper portion 169 are configured by using a cushioning cloth material. It can be configured using a cloth material sandwiched between two cloths or a cloth material made of a cloth having cushioning properties. Moreover, the cloth material used for the seat surface part 156, the backrest part 157, the upper side surface part 167, and the upper part 169 may be reinforced including a reinforcement board etc. In consideration of washing the seat 150, it is preferable that the seat 150 can be detachably fixed to the baby carriage body 11. The fixing of the seat 150 to the baby carriage main body 11 can be realized by using a known connector such as a button attached to each position of the seat 150.

  Next, the left and right side portions 160 will be described in detail. As shown in FIGS. 28-30, each side part 160 is arrange | positioned in the position which faces the back surface of the side body part 161 connected to the seat surface part 156, and the upper side part 167 of the side to which the part corresponds at least. And a side surface connecting portion 165 connected to at least one of the side surface main body portion 161 and the backrest portion 157 and the upper side surface portion 167. Considering the appearance, regardless of the reclining state, that is, in the state where the backrest 157 is most inclined with respect to the seat surface 156 as shown in FIGS. The edge portion extends to a position facing the back surface of the upper side surface portion 167, in other words, the side surface connecting portion 165 is positioned on the back surface side of the upper side surface portion 167 and / or the backrest portion 157 and faces the infant. It is preferable that the surface is not exposed. Here, the surface on the opposite side of the surface facing the infant riding on the baby carriage 10 is referred to as “back surface”.

  In the illustrated example, the side surface connection portion 165 of the left side surface portion 160 is connected to the left side edge portion of the backrest portion 157, and the right side surface portion 160 side surface connection portion 165 is the right side of the backrest portion 157. Connected to the edge. Further, in the illustrated example, the side surface connecting portion 165 of the left side surface portion 160 is connected from the back side to the connection portion between the backrest portion 157 and the left upper side surface portion 167, and the side surface connecting portion of the right side surface portion 160 is connected. The part 165 is connected from the back side to a connection portion between the backrest part 157 and the upper side surface part 167 on the right side. The side surface connecting portion 165 of each side surface portion 160 may be sewn on both the side edge portion on the corresponding side of the backrest portion 157 and the upper side surface 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 further connected to the left side edge portion of the lower portion of the backrest portion 157. Has been. Similarly, the side body 161 of the right side 160 is connected to the right side edge of the seat surface 156, and is further connected to the right side edge of the lower portion of the backrest 157. The side surface main body portion 161 of each side surface portion 160 may be sewed on the side edge portions on the corresponding side of the seat surface portion 156 and the backrest portion 157.

  In the illustrated example, each side surface portion 160 is continuously connected to the seat surface portion 156 and the backrest portion 157 at the side surface main body portion 161 and the side surface coupling portion 165. In particular, in the illustrated example, the position of the lower end of the connection portion between each upper side surface portion 167 and the backrest portion 157 is determined so that the side body portion 161 and the side surface connection of the connection edges of the side surface portion 160 to the backrest portion 157 It coincides with the position that becomes the boundary with the part 165.

  In addition, from the viewpoint of more effectively preventing the side surface portion 160 from falling inward in the width direction and deforming outward in the width direction and spreading in the width direction, the side surface connection portion 165 of the side surface portion 160 is It is preferable that the side surface portion 160 is more easily deformed than the side surface main body portion 161. As an example, it is preferable to form the side surface connecting portion 165 of the side surface portion 160 using a fabric that is easier to deform than the side surface main body portion 161 of the side surface portion 160. Specifically, the side body 161 is made of a cushioning material similar to the above-described seat surface 156, backrest 157, upper side 167, and upper 169, and the side coupling 165 is simply a fabric. You may make it comprise from.

  The side body portion 161 is held in a posture standing up from the seat surface portion 156, and faces the infant who gets on the baby carriage 10 from the side. From this point, it is preferable that the side body portion 161 that can come into contact with the infant is formed using a material having cushioning properties. For example, it is preferable that the side surface main body 161 is configured using a self-supporting cloth material such as a cloth material in which a material such as a sponge having a cushioning property is sandwiched between two cloths.

  As well shown in FIGS. 28 to 30, a first fold line 162 a and a second fold line 162 b are formed on the side surface main body 161 of each side surface part 160. 28 to 30, the fold lines 162a and 162b are side ends of the connecting portion between the seat surface portion 156 and the back support portion 157 that serve as the swing axis between the seat surface portion 156 and the back support portion 157. It extends so as to follow generally the path of the radiation centering on. The side body portion 161 includes two fold lines 162a and 162b, a first portion 161a connected to the seat surface portion 156, a third portion 161c connected to the side surface connecting portion 165, a first portion 161a, and a third portion 161c. And a second portion 161b disposed between the two.

  The fold lines 162a and 162b are linearly extending regions that are more easily deformed than other portions of the side surface main body 161. In the illustrated example, the creases 162a and 162b are formed as sewing lines formed on a cloth material having cushioning properties. Further, as a form other than the sewing line, the creases 162a and 162b may be formed by through holes formed side by side in a line or by a heat-compressed line.

  As well shown in FIGS. 28 to 30, reinforcing members 163 a, 163 b, and 163 c are respectively provided on the back side of each side surface portion 160. The reinforcing members 163a, 163b, and 163c are plate-like members formed of a material that is more difficult to deform than the side body portion 161, for example, a resin such as polypropylene, and the first to third portions 161a of each side body portion 161. , 161b, 161c, respectively.

  In addition, as shown in FIG. 28, the seat 150 further includes a cover 170 extending from an outer edge portion spaced from the upper side surface portion 167 and the backrest portion 157 of the upper portion 169. As shown in FIGS. 1 and 2, the cover 170 covers a part of the back surface of the back pad 157, the upper side surface 167, and the upper portion 169. Further, a part of the side surface main body 161 and the side surface connecting portion 165 of the side surface portion 160 disposed to face the back surface of the upper side surface portion 167 is covered with the cover 170. Illustration of the cover 170 is omitted in FIGS. 29 and 30.

  By the way, as shown in FIG. 28, a connecting member 153 that is detachably connected to the seat support unit 40 is provided on the side surface portion 160 of the seat 150. The connector 153 is provided in the third portion 161 c of the side surface main body 161. In particular, in the illustrated example, the connector 153 is attached to the back surface of the third portion 161c, and the edge portion (upper edge portion) of the third portion 161c on the side away from the seat surface portion 156 and the backrest portion 157. And in the vicinity of the side surface connecting portion 165. On the other hand, a connecting member 46 that can be engaged with the connecting member 153 is provided on a member of the seat support unit 40 that swings relative to the main body frame 15 during the reclining operation. The seat 150 and the seat support unit 40 are connected to each other via connecting tools 153 and 46. The pair of couplers 153 and 46 may be composed of buttons, buckles, hooks and loops, and hook-and-loop fasteners.

  As shown in FIGS. 8, 9, 10, and 11, in the illustrated example, a connecting tool 46 is attached to the side support element 45 of the seat support unit 40. The portion of the side support element 45 where the connection tool 46 is provided is displaced from the front lower connection portion 45a that becomes the swing axis sc1 of the side support element 45 to the main body frame 15 in a side view of the baby carriage 10. At a position near the swing axis sc1. Further, as shown in FIGS. 8 and 9, the portion of the side support element 45 where the connector 46 is provided is such that the side support element 45 is located with respect to the main body frame 15 in a side view of the baby carriage 10. In a state of swinging upward, the side support element 45 is positioned above the swing axis SC <b> 1 with respect to the main body frame 15 and the side support element 45 swings rearward with respect to the main body frame 15. Thus, the side support element 45 is located behind the swing axis sc1 with respect to the main body frame 15. Further, the portion of the side support element 45 where the coupling tool 46 is provided is located on the side of the baby carriage 10 in a state where the side support element 45 swings upward with respect to the main body frame 15. The support element 45 is positioned forward and upward from the state in which the support element 45 swings backward with respect to the main body frame 15.

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

  First, according to the present embodiment, the side surface portion 160 of the seat 150 and the seat support unit 40 are detachably coupled via the coupling tools 46 and 153. Therefore, as shown in FIG. 1 and FIG. 2 or FIG. 29 and FIG. 30, it is possible to effectively prevent the baby carriage body 11 from falling inward in the width direction or spreading outward in the width direction due to the reclining operation or the like. can do. 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 from being separated from the baby carriage main body 11. Therefore, it is possible to effectively avoid clothes or the like being sandwiched between the seat 150 and the baby carriage body 11. In addition, the side surface portion 160 that has fallen inward also prevents the baby from sitting on the seat surface portion 156 when the baby is put on the baby carriage 10. For this reason, by preventing the side portion 160 from falling into the inside, the baby can be appropriately and stably placed on the baby carriage 10 stably and easily. Furthermore, it is also preferable in terms of appearance to prevent the side portion 160 from falling into the inside. In addition, since the side surface portion 160 is effectively prevented from spreading outward in the width direction, it is effective that the side surface portion 160 interferes with the baby carriage body 11 during the folding operation and the unfolding operation of the baby carriage body 11. Can be avoided. Thereby, the folding operation and the unfolding operation of the baby carriage 10 can be stably performed.

  At the same time, the connector 46 is provided on a member of the seat support unit 40 that swings relative to the main body frame 15 during the reclining operation, specifically, the side support element 45. Therefore, a portion of the side surface portion 160 of the seat 150 that is connected to the side support element 45 via the couplers 46 and 153 and at least a portion that is in the vicinity thereof are reclining operation of the seat support unit 40 of the baby carriage 10. With it, it can work. Therefore, by appropriately setting the attachment positions of the couplers 46 and 153, it is possible to always arrange the side surface portion 160 at an appropriate position with respect to the backrest portion 157 that moves by the reclining operation. Accordingly, the side surface portion of the seat may be appropriately positioned with respect to the backrest portion while sufficiently suppressing the falling of the side surface portion of the seat inward in the width direction and the outward expansion in the width direction. It becomes possible.

  In the above-described embodiment, the portion of the side support element 45 where the coupling tool 46 is provided is the swing axis sc1 of the side support element 45 to the main body frame 15 in a side view of the baby carriage 10. It is arranged at a position that is shifted from the front lower connecting portion 45a and in the vicinity of the swing axis sc1. Therefore, while it is possible to appropriately arrange the side surface portion 160 with respect to the back rest portion 157, the portion to which the coupling tool 153 of the side surface portion 160 is attached greatly moves along with the reclining operation of the back rest portion 157. Therefore, the portion of the side surface portion 160 other than the portion where the connector 153 is provided, for example, the portion of the side surface portion 160 that is connected to the seat surface portion 156 and the portion where the connector 153 is provided. More specifically, it is possible to more stably prevent the second portion 161b of the side body portion 161 from falling inward or outward in the width direction.

  Further, in the present embodiment, as shown in FIGS. 8 and 9, the side support element 45 in the side support element 45 is provided with the side support element 45 in the side view of the baby carriage 10. In a state of swinging upward with respect to the main body frame 15, the side support element 45 is positioned above the swing axis SC <b> 1 with respect to the main body frame 15, and the side support element 45 is rearward with respect to the main body frame 15. The side support element 45 is positioned rearward of the swing axis sc1 with respect to the main body frame 15 in a state of swinging in the horizontal direction. Further, the portion of the side support element 45 where the coupling tool 46 is provided is located on the side of the baby carriage 10 in a state where the side support element 45 swings upward with respect to the main body frame 15. The support element 45 is positioned forward and upward from the state in which the support element 45 swings backward with respect to the main body frame 15. Therefore, in a state where the backrest portion 157 rises with respect to the seat surface portion 156 and the infant is seated on the seat 150, the side surface portion 160 moves relatively forward and is pulled upward. Thereby, the infant seated on the baby carriage 10 can be appropriately protected from the side by the side surface portion 160. On the other hand, in the state where the backrest portion 157 falls with respect to the seat surface portion 156 and the infant lies on the seat 150, the side surface portion 160 moves relatively rearward. Thereby, the infant lying on the baby carriage 10 can be appropriately protected from the side by the side surface portion 160 and the upper side surface portion 167.

  Further, according to the present embodiment, the side surface portion 160 that extends from the seat surface portion 156 side and the upper side surface that extends from the backrest portion 157 are the side walls of the seat 150 that is mounted on the baby carriage body 11. It is divided into a part 167. Therefore, as shown in FIG. 1 and FIG. 2 or FIG. 29 and FIG. 30, when the backrest 157 rises from the tilted state due to the reclining operation of the baby carriage body 11, The upper side surface portion 167 can move relatively. For this reason, it can suppress effectively that the side part 160 falls inward in the width direction, or brings about some deformation | transformation to the width direction and spreads outward in the width direction, for example.

  Further, the side surface portion 160 is connected to the backrest portion 157 by a side surface coupling portion 165 disposed at a position facing the upper side surface portion 167 from the back surface side. For this reason, handling of the sheet 150 becomes easy.

  Furthermore, according to the present embodiment, the side surface connecting portion 165 is made of a material that is more easily deformed than the material of the side surface main body portion 161. According to such a seat 150, when the backrest portion 157 of the seat 150 changes the inclination angle with respect to the seat surface portion 156 in accordance with the reclining operation or folding operation of the baby carriage body 11, the back rest portion 157 and the seat surface portion 156 are provided. Are easily deformed at the side surface connecting portion 165 located on the back surface side of the upper side surface portion 167, and deformation at the side surface main body portion 161 is suppressed. Thereby, when the seat surface portion 156 and the backrest portion 157 approach and the upper side surface portion 167 and the side surface portion 160 move relative to each other, the side surface main body portion 161 of the side surface portion 160 may fall inward in the width direction. Spreading outward in the width direction can be more effectively prevented.

  Furthermore, according to the above-described embodiment, the side surface portion 160 passes through the position that is the side end of the connection portion of the seat surface portion 156 and the backrest portion 157, and the seat surface portion 156 via the connection portion that extends linearly. And the back support 157. For this reason, it is possible to prevent a hole or a gap from being formed in the seat 150 at a position near the waist portion of the infant riding on the baby carriage 10, which is preferable in terms of safety.

  Furthermore, according to the above-described embodiment, the connection portion between the side surface connecting portion 165 and the backrest portion 157 and the boundary between the side surface connecting portion 165 and the side surface main body portion 161 are generally the seat surface portion 156 and the backrest portion. It extends along a locus of radiation centering on the swing axis with respect to 157. Therefore, when the backrest portion 157 of the seat 150 changes the inclination angle with respect to the seat surface portion 156 in accordance with the reclining operation or folding operation of the baby carriage body 11, the side surface portion 160 that connects the backrest portion 157 and the seat surface portion 156 is The upper side surface portion 167 is easily deformed at the side surface connecting portion 165 located on the back surface side. Thereby, it can prevent more effectively that the side surface main-body part 161 of the side part 160 falls inward in the width direction, or spreads outward in the width direction.

  Furthermore, according to the present embodiment, the first fold line 162a and the second fold line 162b are formed in the side surface main body part 161 of the side surface part 160. The folds 162a and 162b extend in a radial pattern about the swing axis of the seat surface portion 156 and the backrest portion 157. For example, when the backrest portion 157 and the seat surface portion 156 are very close to each other, such as when the baby carriage 10 is folded, the side surface portion 160 is not only deformed at the side surface connecting portion 165 but also the first fold 162a and the first fold 162a. The side body part 161 may be folded at the second fold 162b so that the first part 161a, the second part 161b, and the third part 161c overlap. Thereby, when the baby carriage 10 is folded, the side portion 160 can be effectively prevented from falling inward in the width direction and spreading outward in the width direction.

  Furthermore, according to the present embodiment, the reinforcing members 163a, 163b, and 163c are provided on the first to third portions first portions 161a, 161b, and 161c of the side surface main body portion 161, respectively. The reinforcing members 163a, 163b, and 163c also effectively prevent the side portion 160 from falling inward in the width direction and spreading outward in the width direction when the backrest 157 is reclining or the baby carriage 10 is folded. can do. In particular, the reinforcing member 163c provided in the third portion 161c is disposed in the vicinity of the connector 153. Therefore, even if the side surface portion 160 is moved in accordance with the operation of the side support element 45, the side surface 160 is provided by the reinforcing member 163 c positioned in the vicinity of the coupling tools 46 and 153 that connect the side support element 45 and the side surface portion 160. The portion 160 can effectively prevent the side surface portion 160 from falling inward in the width direction and spreading outward in the width direction.

<< basket 90 >>
Next, the car 90 will be described with reference mainly to FIGS. 5, 7, 31 and 32. The car 90 is attached to the baby carriage main body 11 and supported at a position below the seat support unit 40. As shown in FIG. 5, the car 90 has 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. Of these, the bottom surface 91 includes a bottom panel 96. The rear surface 92 also includes a rear panel 97 connected to the rear portion of the bottom panel 96, in the illustrated example, to the rear edge. The bottom panel 96 and the rear panel 97 may be included in the bottom surface 91 and the rear surface 92 so as to be covered with a cloth material, respectively. The rear panel 97 can swing around an axis db extending in the width direction with respect to the bottom panel 96. As shown in FIG. 5, the front portion of the front surface 93 or the side surface 94 and the intermediate portion of the side surface 94 are connected to the baby carriage body 11. As a result, the rear portion of the car 90 is exposed and opened behind the seat support unit 40.

  31 and 32, a bottom panel 96 and a rear panel 97 are shown. In the specific example shown in FIG. 31, the rear portion of the upper surface of the bottom panel 96 (the surface that is the inner side of the car 90) and the connecting member 98 are connected to each other by a seam 98a along the width direction, and the rear panel. A lower portion of the front surface of 97 (the surface on the inside of the car 90) and the connecting member 98 are connected to each other by a seam 98a along the width direction. The bottom panel 96 and the rear panel 97 are formed using, for example, a self-supporting material having a certain degree of rigidity, and the connecting member 98 is formed of a flexible material such as a cloth. As a result, the bottom panel 96 and the rear panel 97 are connected to each other and can swing with respect to each other.

  Further, an urging member 99 attached to the bottom panel 96 and the rear panel 97 and extending between the bottom panel 96 and the rear panel 97 is provided. The urging member 99 urges the rear surface 92 of the car 90 to fall backward from the bottom surface 91. In the specific example shown in FIG. 32, the urging member 99 is an elastic material made of rubber, for example, and one end is attached to the bottom panel 96 in an expanded state and the other end is attached to the rear panel 97. The urging force is generated by being attached to.

  As described above, in 90 in the present embodiment, the rear surface 92 of the car 90 is biased by the biasing member 99 so as to fall backward from the bottom surface 91. Therefore, since the rear surface 92 of the car 90 is developed rearward, the loading / unloading of the luggage can be facilitated. In addition, since the inside of the car 90 is easily visible, it is possible to effectively prevent forgetting to remove the luggage from the car 90. Furthermore, since forgetting to remove the luggage is effectively prevented, it is possible to effectively prevent the folding operation of the baby carriage 10 from being hindered due to forgetting to remove the luggage.

  Further, as shown in FIG. 5, the upper edge of the side surface 94 is formed as a side surface reinforcing edge 94 a and is maintained in a tensioned state between the front surface 93 and the rear surface 92. Since the side surface 94 of the car 90 is tense and does not fall inside, the loading / unloading of the luggage can be facilitated. In addition, since the inside of the car 90 is easily visible, it is possible to effectively prevent forgetting to remove the luggage from the car 90. Furthermore, since forgetting to remove the luggage is effectively prevented, it is possible to effectively prevent the folding operation of the baby carriage 10 from being hindered due to forgetting to remove the luggage.

  Further, in the present embodiment, the baby carriage body 11 is configured to be foldable. In the side view when the baby carriage main body 11 is folded as shown in FIG. 7, the rear surface 92 of the car 90 has an upper edge when the baby carriage main body 11 is unfolded by the biasing force from the biasing member 99. It can incline so that it may be located below the lower edge at the time of expansion | deployment. When such a baby carriage 10 is folded, the luggage stored in the car 90 automatically comes out of the car 90 due to the inclination of the rear surface 92. Also from this point, it is possible to effectively prevent forgetting to remove the luggage from the car 90, and to effectively prevent the folding operation of the baby carriage 10 from being obstructed due to forgetting to remove the luggage. it can.

  Further, in the present embodiment, in the side view when the baby carriage body 11 shown in FIG. 7 is folded, the bottom surface 91 of the car 90 is the front edge when the baby carriage body 11 is deployed. It can be inclined so that it is located below the edge. When such a baby carriage 10 is folded, the luggage stored in the car 90 tends to automatically come out of the car 90 due to the inclination of the bottom surface 91. Also from this point, it is possible to effectively prevent forgetting to remove the luggage from the car 90, and to effectively prevent the folding operation of the baby carriage 10 from being obstructed due to forgetting to remove the luggage. it can.

DESCRIPTION OF SYMBOLS 10 Stroller 13 Shaft member 15 Main body frame 20 Front leg 21 Rear leg 22 First link element, armrest 24 Second link element, connecting rod 26b Boss, third boss 26b1 Boss surface 26b1 End surface, one end surface 26b2 End surface, the other end surface 28 Third link element 30b Boss, second boss 40 Seat support unit 50 Seat surface part support element 50a Through hole 54a Boss receiver, first boss receiver 60 Back support part support element 60a Through hole 62a Boss, first boss 62b Boss receiver, first 2 Boss receiver 70 Handle 75b Boss receiver, third boss receiver 76b1 Boss receiving surface 76b1 End surface, one end surface 76b2 End surface, the other end surface

Claims (10)

Body frame,
A seat support unit connected to the main body frame via a shaft member and connected to the main body frame so as to be rotatable about the axial direction of the shaft member;
The seat support unit includes a seat surface support element that faces the buttocks of the infant, and a backrest support element that faces the back of the infant,
One of the seat surface portion support element and the backrest portion support element is provided with a boss including a boss surface positioned on a circumference centering on the axial direction of the shaft member, and the seat surface portion support element and the back surface support element are provided. A boss receiver that receives the boss surface of the boss is formed on the other of the abutting support elements,
By the engagement via the boss and the boss receiver, the back support portion support element is connected to the seat surface portion support element, and the seat surface portion is centered on the rotation center of the seat support unit with respect to the main body frame. It can swing with respect to the support element ,
The boss extends annularly on the shaft member along a circumference centered on the axial direction of the shaft member, and forms a through hole through which the shaft member passes,
The boss receiver is a baby carriage that forms a through hole through which the boss passes . The one of the seat surface portion support element and the back support portion support element is in contact with the shaft member, and the other of the seat surface portion support element and the back support portion support element is separated from the shaft member. The baby carriage according to claim 1.   One of the main body frame and the seat support unit is provided with a second boss including a boss surface located on a circumference centered on the axial direction of the shaft member, and the other of the main body frame and the seat support unit. The baby carriage according to claim 1, further comprising a second boss receiver that receives the boss surface of the second boss. The body frame is
A front link connected to the first link element and swingable with respect to the first link element;
A rear leg connected to the first link element and swingable relative to the first link element;
Wherein a swingable to the connected first link element and the rear portion of the first link element, and, the second link element is swingable with respect to the sheet support unit is connected to the sheet support unit When,
A third link element connected to the rear leg and swingable relative to the rear leg, and connected to the second link element and swingable relative to the second link element; ,
The shaft member passes through the second link element, the third link element, and the seat support unit in this order,
The second boss is provided on one of the third link element and the sheet support unit, and the second boss receiver is formed on the other of the third link element and the sheet support unit. Baby carriage. A handle that is connected to a baby carriage main body including the main body frame and the seat support unit via a shaft member, and is swingably connected to the baby carriage main body about the axial direction of the shaft member. And more,
One of the baby carriage body and the handle is provided with a third boss including a boss surface located on a circumference centered on the axial direction of the shaft member, and the other of the baby carriage body and the handle has the first boss. The baby carriage according to any one of claims 1 to 4, wherein a third boss receiver that receives the boss surface of three bosses is formed. The third boss further includes a pair of end surfaces located on both sides of the boss surface along the circumference and non-parallel to the boss surface together with the boss surface located on a part of the circumference,
The third boss receiver includes a boss receiving surface positioned on a circumference centered on the axial direction of the shaft member, and is positioned on both sides of the boss receiving surface along the circumference and is not in contact with the boss surface. A pair of parallel end faces,
The engagement between one end face of the third boss and one end face of the third boss receiver, and the engagement between the other end face of the third boss and the other end face of the third boss receiver, The baby carriage according to claim 5, wherein a swingable range of a handle relative to the baby carriage body is defined. The body frame is
A front link connected to the first link element and swingable with respect to the first link element;
A rear leg connected to the first link element and swingable relative to the first link element;
Wherein a swingable to the connected first link element and the rear portion of the first link element, and, the second link element is swingable with respect to the sheet support unit is connected to the sheet support unit When,
A third link element connected to the rear leg and swingable relative to the rear leg, and connected to the second link element and swingable relative to the second link element; ,
The shaft member passes through the handle, the second link element, the third link element, and the seat support unit in this order,
The baby carriage according to claim 5 or 6, wherein the third boss is provided on one of the second link element and the handle, and the third boss receiver is formed on the other of the second link element and the handle. . A seat support unit which is connected to the main body frame via the shaft member so as to be rotatable about the axial direction of the shaft member to form a baby carriage,
The seat support unit includes a seat surface support element that faces the buttocks of the infant, and a backrest support element that faces the back of the infant,
One of the seat surface portion support element and the backrest portion support element is provided with a boss including a boss surface positioned on a circumference centering on the axial direction of the shaft member, and the seat surface portion support element and the back surface support element are provided. A boss receiver that receives the boss surface of the boss is formed on the other of the abutting support elements,
By the engagement via the boss and the boss receiver, the back support portion support element is connected to the seat surface portion support element, and the seat surface portion is centered on the rotation center of the seat support unit with respect to the main body frame. It can swing with respect to the support element ,
The boss extends annularly on the shaft member along a circumference centered on the axial direction of the shaft member, and forms a through hole through which the shaft member passes,
The boss receiver is a sheet support unit that forms a through hole through which the boss passes . Body frame,
A seat support unit connected to the main body frame via a shaft member and connected to the main body frame so as to be rotatable about the axial direction of the shaft member;
One of the main body frame and the seat support unit is provided with a boss including a boss surface located on a circumference centered on the axial direction of the shaft member, and the other of the main body frame and the seat support unit, A boss receiver for receiving the boss surface of the boss is formed,
The body frame is
The first link element and
A front leg connected to the first link element and swingable relative to the first link element;
A rear leg connected to the first link element and swingable relative to the first link element;
A second link element connected to the rear portion of the first link element and swingable relative to the first link element, and connected to the seat support unit and swingable relative to the seat support unit When,
A third link element connected to the rear leg and swingable relative to the rear leg, and connected to the second link element and swingable relative to the second link element; ,
The shaft member passes through the second link element, the third link element, and the seat support unit in this order,
The baby carriage , wherein the boss is provided on one of the third link element and the seat support unit, and the boss receiver is formed on the other of the third link element and the seat support unit . A baby carriage main body having a main body frame and a seat support unit connected to the main body frame via a shaft member and connected to the main body frame so as to be rotatable about an axial direction of the shaft member ;
A handle connected to the baby carriage body through the shaft member and connected to the baby carriage body so as to be swingable about the axial direction of the shaft member;
One of the baby carriage body and the handle is provided with a boss including a boss surface located on a circumference centered on the axial direction of the shaft member, and the other of the baby carriage body and the handle has the boss A boss receiver that receives the boss surface is formed,
The body frame is
The first link element and
A front leg connected to the first link element and swingable relative to the first link element;
A rear leg connected to the first link element and swingable relative to the first link element;
A second link element connected to the rear portion of the first link element and swingable relative to the first link element, and connected to the seat support unit and swingable relative to the seat support unit When,
A third link element connected to the rear leg and swingable relative to the rear leg, and connected to the second link element and swingable relative to the second link element; ,
The shaft member passes through the handle, the second link element, the third link element, and the seat support unit in this order,
A baby carriage , wherein the boss is provided on one of the second link element and the handle, and the boss receiver is formed on the other of the second link element and the handle .