JP6407703B2 - baby carriage - Google Patents

Description

  The present invention relates to a baby carriage capable of easily locking a wheel in a state where a handle is in a face-to-face pushing position.

  A baby carriage that can switch a handle between a face-to-face pressing position and a back-side pressing position is widely used (see, for example, Patent Document 1). When the handle is in the back pushing position, the operator grips the handle from the rear leg side that is the back of the infant. Then, the operator pushes the baby carriage so that the infant faces forward in the traveling direction. On the other hand, when the handle is in the face-to-face pressing position, the operator holds the handle from the front leg side facing the infant. Then, the operator pushes the baby carriage with the rear leg side in front of the traveling direction.

  When the baby carriage is stopped, the wheel is locked by operating a brake pedal provided on the caster so that the baby carriage does not move. The arrangement of the brake pedal for locking the wheel differs depending on the type of the baby carriage, and there is a type provided only on the rear wheel.

JP 2011-031724 A

  When the baby carriage is stopped after gripping the handle from the front leg side and the baby carriage is stopped, the operator has to bother to operate the rear wheel brake pedal in the type of baby carriage that has a brake pedal only on the rear wheel. And you have to lock the wheels. On the other hand, in a baby carriage of a type in which a brake pedal is also provided on the front wheel side, the wheel can be locked by operating the brake pedal on the front wheel side under the foot. However, the brake pedal on the front wheel side is provided independently for each of the left and right wheels, and it is troublesome to operate the left and right brake pedals. That is, in the conventional baby carriage, the wheel cannot be easily locked in a state where the handle is in the face-to-face pushing position.

  The present invention has been made in consideration of such points, and an object of the present invention is to provide a baby carriage that can easily lock a wheel in a state where a handle is in a face-to-face pushing position.

A baby carriage according to the present invention includes a baby carriage body having a pair of front legs, and a pair of casters connected to the corresponding front legs,
Each caster is a fixed body fixed to the front leg, a rotating body connected to the fixed body so as to be rotatable about the caster axis, and rotatable relative to the rotating body. A wheel that is supported by the rotating body via an axle so as to be, a lock position that engages the wheel and restricts relative rotation of the wheel with respect to the rotating body, and a distance between the wheel and the wheel. A release position for releasing the lock on the rotating body, and a lock member attached to the rotating body so as to be movable between,
The lock members of the pair of casters are connected to each other via a connecting means,
The connecting means is connected to each lock member so that when the lock member of one of the casters moves to the lock position, the lock member of the other caster moves to the lock position.

  In the baby carriage according to the present invention, the connecting means may move the lock member of the other caster to the release position when the lock member of one of the casters moves to the release position.

  In the baby carriage according to the present invention, the connecting means includes a wire member that connects the lock members of the pair of casters, a movable cylindrical body that guides the wire member is fixed to the rotating body, and the wire member is The fixed side cylindrical body to be guided may be fixed to at least one of the fixed body or the baby carriage main body, and the movable side cylindrical body may be separated from the fixed side cylindrical body.

  In the baby carriage according to the present invention, each lock member includes a locking projection, and each wheel receives a locking projection of the lock member when the corresponding locking member is located at the locking position. A groove may be provided.

  In the baby carriage according to the present invention, the lock member may include a pedal portion that switches between the lock position and the release position when operated by an operator.

  In the baby carriage according to the present invention, the fixed body and the rotating body are connected so as to be rotatable relative to each other via a caster shaft extending along the caster axis, and the wire material constituting the connecting means is the caster shaft. The inside may pass along the caster axis.

  In the baby carriage according to the present invention, the baby carriage main body may further include a handle that can swing between a back pushing position and a face pushing position.

  According to the present invention, when the lock member of one caster on the front wheel side is moved to the lock position, the lock member of the other caster is also moved to the lock position in conjunction with this. For this reason, the operator can interlock and lock both wheels on the front wheel side by operating the lock member of one caster on the front wheel side that is the foot when the handle is in the face-to-face push position. It becomes possible. As a result, a baby carriage that can easily lock the wheels in a state where the handle is in the face-to-face pushing position is realized.

The perspective view which shows the baby carriage by one embodiment of this invention. The side view of the baby carriage shown in FIG. The perspective view which shows the caster attached to the front leg of the left side of the baby carriage shown in FIG. However, in order to facilitate understanding, some of the parts constituting the outer surface are omitted. The perspective view which shows the caster attached to the right leg of the baby carriage shown in FIG. However, in order to facilitate understanding, some of the parts constituting the outer surface are omitted. The disassembled perspective view of the caster shown in FIG. The side view which expands and shows the caster shown in FIG. The side view which shows the state which moved the lock member to the lock position in the caster shown in FIG. The side view which shows the state which moved the lock member to the cancellation | release position in the caster shown in FIG. The schematic diagram for demonstrating the connection method of a wire material. The side view which shows the state which moved the lock member to the lock position in the caster shown in FIG. The side view which shows the state which moved the lock member to the cancellation | release position in the caster shown in FIG. The side view which shows the example which provided the pedal part in the caster shown in FIG. The side view which shows the example which provided the pedal part in the caster shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1-11 is a figure for demonstrating one Embodiment of the baby carriage and caster by this invention.

  Among these, FIG.1 and FIG.2 shows the whole structure of the baby carriage 1. FIG. The baby carriage 1 shown in FIGS. 1 and 2 includes a baby carriage main body 2 and casters 10 and 100 attached to the baby carriage main body 2. Among these, the baby carriage main body 2 includes a frame portion 6 having a pair of front legs 3 and a pair of rear legs 5, and a handle 7 connected to the frame portion 6. The pair of front legs 3 are connected by a front connecting member 4.

  A caster 10 that will be described in detail later is attached to the lower ends of the pair of front legs 3. The caster 10 can hold the wheel 70 rotatably about the rotation axis Ar and can rotate the wheel 70 about the caster axis Ac. On the other hand, a wheel holder 100 is attached to the lower ends of the pair of rear legs 5. The wheel holding body 100 holds the wheel 70 rotatably while keeping the direction of the wheel 70 constant.

  In the stroller 1 shown in FIGS. 1 and 2, the handle 7 can swing with respect to the frame portion 6. The handle 7 can swing between a back pushing position (rear position) P3 indicated by a solid line in FIG. 2 and a facing pushing position (front position) P4 indicated by a two-dot chain line in FIG. ing.

  In addition, the structure which enables the handle | steering-wheel 7 to rock | fluctuate with respect to the frame part 6 can employ | adopt a known structure, for example, the structure disclosed by JP2008-254688A. Therefore, further detailed description is omitted in this specification.

  In the present embodiment, the baby carriage 1 is configured to be foldable so as to be widely used. As a configuration that allows the baby carriage 1 to be folded, a known configuration, for example, the configuration disclosed in JP2008-254688A described above can be employed. Therefore, further detailed description is omitted in this specification.

  In the present specification, the terms “front”, “rear”, “upper” and “lower” with respect to the baby carriage 1 and its constituent elements are infants riding on the baby carriage 1 in an unfolded state unless otherwise specified. Means “front”, “rear”, “upper” and “lower”. Therefore, the “front-rear direction” corresponds to a direction connecting the lower left and the upper right of the page in FIG. Unless otherwise specified, “front” refers to the side on which the infant who rides faces, and is the upper right side of the page in FIG. 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 1 is placed. Therefore, when the surface on which the baby carriage 1 is placed is a horizontal plane, the “vertical direction” indicates the vertical direction. The “lateral direction” and the “width direction” are directions orthogonal to both the “front-rear direction” and the “up-down direction”. Further, “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 1, respectively. As shown in FIG. 1, the baby carriage 1 is generally symmetric with respect to a center plane in the width direction extending along the front-rear direction.

  Next, the configuration of the caster 10 and the stroller 1 related to the caster 10 will be described mainly with reference to FIGS. 3, 5, and 6 are views showing the caster 10 attached to the left front leg 3, and FIG. 4 is a view showing the caster 10 attached to the right front leg 3. The left and right casters 10 are different in the configuration related to the method of connecting the wire member 60 described later, and the other configurations can be configured in the same manner.

  As shown in FIGS. 3 to 6, the caster 10 according to the present embodiment includes, as a whole, a fixed body 20 fixed to the front leg 3 of the baby carriage 1 and a rotating body rotatable with respect to the fixed body 20. 40. The fixed body 20 and the rotating body 40 are connected so as to be relatively rotatable via a caster shaft 30 extending along the caster axis line Ac. The rotating body 40 rotatably supports the wheel 70 via an axle 80 (see FIG. 5). The wheel 70 rotates with respect to the rotating body 40 about a rotation axis Ar that coincides with the axial direction of the axle 80.

  The rotation axis Ar is not parallel to the caster axis Ac, and more specifically, is orthogonal. In the illustrated example, the rotation axis Ar is parallel to the horizontal direction, and the caster axis Ac is parallel to the vertical direction. As shown in FIG. 1, the caster 10 has a pair of wheels 70 disposed so as to sandwich the rotating body 40. However, for convenience of understanding, in FIG. 3, FIG. 4, and FIG. 6 to FIG. 11, the illustration of one wheel located on the near side in the illustrated field of view is omitted.

  As shown in FIGS. 5 and 6, the fixed body 20 fixed to the front leg 3 is configured by an axial member extending along a partially curved path, and a through hole 20 a is formed along the axial direction. Is formed. A caster shaft 30 is inserted into the through hole 20a of the fixed body 20 from below in FIG. The distal end portion (upper end portion in FIG. 5) of the inserted caster shaft 30 and the fixed body 20 are fixed via a pin 22.

  The caster shaft 30 is formed in a cylindrical shape, and the hollow space 30 a communicates with the through hole 20 a in the fixed body 20. Further, a diameter-expanding collar 31 is formed at the base end portion (lower end portion in FIG. 5) of the caster shaft 30, and the diameter-expanding collar 31 protrudes downward from the fixed body 20. Note that the wire member 60 and the pipe 66 pass through the caster shaft 30 and the fixed body 20, which will be described later.

  The rotating body 40 includes an upper holder 41 and a lower holder 42 disposed below the upper holder 41. As shown in FIG. 6, the upper holder 41 is formed with a vertical hole 41 a into which the caster shaft 30 is inserted. By rotating the upper holder 41 with respect to the caster shaft 30 inserted into the vertical hole 41a, the relative rotation of the rotating body 40 with respect to the fixed body 20 is enabled.

  A space that is wider than the vertical hole 41a is expanded below the vertical hole 41a, and an enlarged collar 31 of the caster shaft 30 is accommodated in this space. By accommodating the diameter-expanded collar 31 of the caster shaft 30 in the upper holder 41, the caster shaft 30 is prevented from coming out of the rotating body 40.

  A caster lock lever 43 is attached to the upper holder 41. By operating the caster lock lever 43, the rotating body 40 and the fixed body 20 can be selectively locked, and the rotation of the rotating body 40 relative to the fixed body 20 about the caster axis line Ac can be restricted.

  As shown in FIG. 3, a lower holder 42 is connected to the upper holder 41 via a pin 44. The lower holder 42 rotatably holds the wheel 70 via an axle 80 (see FIG. 5). In the present embodiment, an axle hole 42a is provided in the lower holder 42, and an axle 80 is inserted into the axle hole 42a.

  Further, as shown in FIG. 5, a lock member 50 is attached to the lower holder 42. The lock member 50 is a part that regulates relative rotation of the wheel 70 with respect to the rotating body 40. The lock member 50 is attached to a portion of the lower holder 42 that protrudes in the horizontal direction from the other portion via a fulcrum pin 45 so as to be swingable. When the lock member 70 swings with respect to the lower holder 42, the lock member 70 engages with the wheel 70 and restricts the relative rotation of the wheel 70 with respect to the rotating body 40, and moves away from the wheel 70. It can move between a release position P2 where the lock on the rotating body 40 is released.

  FIG. 7 shows a state where the lock member 50 is arranged at the lock position P1, and FIG. 8 shows a state where the lock member 50 is arranged at the release position P2. The lock member 50 shown in FIGS. 7 and 8 has a lock main body 51 and a locking projection 52 protruding from the lock main body 51.

  The lock body 51 is formed as a resin molded product and is swingably attached to the lower holder 42 via the fulcrum pin 45 described above. The lock body 51 includes a pedal portion 51b that protrudes away from the portion to which the fulcrum pin 45 is attached. By depressing the pedal portion 51b with a foot, the lock position P1 and the release position P2 can be switched.

  As can be understood from FIG. 3, the pedal portion 51 b and the caster lock lever 43 are arranged at positions that partially overlap in the vertical direction. Therefore, the pedal portion 51b has a relief groove 51c for avoiding interference so that the pedal portion 51b and the caster lock lever 43 do not interfere when the pedal portion 51b is swung with respect to the lower holder 42. Is provided. In addition, the pedal part 51b should just be provided in the at least one caster 10, and in the example shown in figure, it is provided only in the left caster 10.

  A locking projection 52 is provided at a position spaced from the fulcrum pin 45. The locking protrusion 52 selectively engages with the wheel 70 to restrict relative rotation of the wheel 70 with respect to the rotating body 40. As understood from FIGS. 3 and 5, in the present embodiment, a pair of locking projections 52 are provided, and each locking projection 52 extends toward the wheel 70 corresponding to each. . In the present embodiment, the extending direction (longitudinal direction) of the locking projection 52 is along the rotation axis Ar.

  Next, the wheel 70 will be described. As well shown in FIG. 3, the wheel 70 includes a wheel portion 71, a tire 72 held on the outer periphery of the wheel portion 71, and a brake plate 73 fixed to the wheel portion 71. . In the present embodiment, the brake plate 73 is fixed to a surface of the wheel portion 71 facing the rotating body 40 side. The brake plate 73 is formed with a plurality of locking grooves 73 a extending in the radial direction about the rotation axis Ar of the wheel 70. The locking groove 73a is for receiving the locking projection 52 of the lock member 50 when the lock member 50 is positioned at the lock position P1. As can be understood from FIG. 3, the locking groove 73 a opens outward in the radial direction.

  By the way, in order to lock the left and right wheels 70, it is complicated to operate the left and right lock members 50 separately. there. In the stroller 1 of the present embodiment, the left and right lock members 50 are connected and synchronized by the wire member 60 as a connecting means. As can be understood from FIGS. 3 and 4, the wire member 60 is guided from the locking member 50 of the left caster 10 through the left front leg 3 to the lower side of the front connecting member 4, and inside the right front leg 3. And is connected to the lock member 50 of the right caster 10.

  In FIG. 9, the connection method of the wire material 60 is shown typically. One end of the wire member 60 is connected to the lock main body 51 of one lock member 50. As understood from FIGS. 3 and 9, a sphere 61 is attached to the tip of the wire member 60, and the sphere 61 is accommodated in a wire attachment portion 51 d provided in the lock body 51. The illustrated wire attachment portion 51 d protrudes from the other part of the lock main body 51 and defines an accommodation space for accommodating the sphere 61. Since the sphere 61 is rotatably held in the wire attachment portion 51d, the twist that may occur in the wire member 60 can be released.

  As understood from FIGS. 3 and 9, a movable side pipe 65 is provided in the upper holder 41 and the lower holder 42 constituting the rotating body 40 so as to secure a path through which the wire material 60 passes. The movable side pipe 65 extends along a partially curved path, and guides the wire material 60 from the wire attachment portion 51 d of the lock member 50 to the inside of the caster shaft 30.

  A fixed side pipe 66 is also provided in the fixed body 20 and the front leg 3 so as to secure a path through which the wire material 60 passes. The fixed side pipe 66 extends along a partially curved path, and guides the wire material 60 from the caster shaft 30 to the front leg 3 through the fixed body 20. By guiding the wire member 60 through the fixed side pipe 66, even when the rotating body 40 rotates with respect to the fixed member 20, a path through which the wire member 60 passes is stably secured, and the wire member 60 is The risk of twisting can be reduced.

  In particular, as schematically shown in FIG. 9, the movable side pipe 65 and the fixed side pipe 66 are separated from each other in the caster shaft 30. That is, the movable side pipe 65 and the fixed side pipe 66 are not fixed to each other. On the other hand, the wire member 60 passes through the caster shaft 30 between the movable side pipe 65 and the fixed side pipe 66 along the caster axis line Ac. Thus, by separating the movable side pipe 65 and the fixed side pipe 66 from each other, even if the rotating body 40 rotates with respect to the fixed body 20, there is a possibility that the wire material 60 and the pipes 65 and 66 are largely twisted. It can be greatly reduced.

  The fixed side pipe 66 of the present embodiment extends further from the front leg 3 along the front connecting member 4 and extends to the other front leg 3 and the fixed body 20. Therefore, the wire member 60 is guided in the fixed side pipe 66 from the fixed body 20 of one caster 10 through the front leg 3 to the lower side of the front connecting member 4 and through the other front leg 3 to the other. To the fixed body 20 of the caster 10.

  As shown in FIG. 4, the other caster 10 is also provided with a movable side pipe 65 that secures a path through which the wire material 60 passes in the rotating body 40. The wire material 60 guided in the movable side pipe 65 provided in the other caster 10 is connected to the wire attachment portion 51d of the lock member 50 via a sphere 61 provided at the tip thereof.

  In this way, by connecting the two lock members 50 via the wire member 60, when the lock member 50 of one caster 10 moves to the lock position P1, the lock member 50 of the other caster 10 is also interlocked and locked. It can be moved to position P1. Conversely, when the lock member 50 of the other caster 10 moves to the lock position P1, the lock member 50 of one caster 10 can also be moved to the lock position P1 in conjunction with it.

  However, when one lock member 50 is pushed out, the wire member 60 acts to pull the other lock member 50 in conjunction therewith. However, if the left and right lock members 50 are symmetrically configured, when one of the lock members 50 is pushed out by the wire member 60 and moves to the lock position P1, the other lock member 50 is connected to the wire. It is pulled by the material 60 and moves to the release position P2, and the left and right lock members 50 cannot be synchronized well. Therefore, in the present embodiment, when one lock member 50 is pushed out by the wire material 60, it moves to the lock position P1, and in conjunction with this, the other lock member 50 is also pulled to the lock position P1. Yes.

  Here, FIG. 7 described above shows a state in which the left lock member 50 is arranged at the lock position P1, and FIG. 8 shows a state in which the left lock member 50 is arranged at the release position P2. . As shown in FIGS. 7 and 8, the left lock member 50 is connected to the wire member 60 at a position facing the locking protrusion 52 with the fulcrum pin 45 interposed therebetween.

  On the other hand, FIG. 10 shows a state where the right lock member 50 is arranged at the lock position P1, and FIG. 11 shows a state where the right lock member 50 is arranged at the release position P2. As shown in FIGS. 10 and 11, the right lock member 50 is connected to the wire member 60 at a position on the same side as the locking projection 52 with respect to the fulcrum pin 45.

  According to such a connecting method of the wire member 60, when the left lock member 50 is pushed out by the wire member 60, it moves to the lock position P1, and in conjunction with this, the right lock member 50 is pulled by the wire member 60 and locked. It moves to the position P1. On the contrary, when the left lock member 50 is pulled by the wire member 60, it moves to the release position P2, and in conjunction with this, the right lock member 50 is pushed out by the wire member 60 and moves to the release position P2.

  Next, the operation of the caster 10 having the above configuration will be described.

  First, in a state where the handle 7 is disposed at the face-to-face push position P4 (a state indicated by a one-dot chain line in FIG. 2), the baby carriage 1 is pushed forward so that the rear leg 5 side is forward in the traveling direction. When the baby carriage 1 is stopped, the baby carriage 1 is stopped and then the pedal portion 51b provided on the left caster 10 is stepped on. When the pedal portion 51b of the left caster 10 is stepped on, the lock member 50 moves from the release position P2 shown in FIG. 8 to the lock position P1 shown in FIG.

  When the left lock member 50 moves to the lock position P <b> 1 shown in FIG. 7, the wire member 60 is pulled by the left lock member 50. In conjunction with this, the right lock member 50 is pulled by the wire member 60 and moves from the release position P2 shown in FIG. 11 to the lock position P1 shown in FIG.

  When each lock member 50 is positioned at the lock position P <b> 1, the locking projection 52 is accommodated in the locking groove 73 a provided on the wheel 70, and the relative rotation of the axle 80 with respect to the rotating body 40 is restricted. Thereby, the left and right lock members 50 can be synchronized, and the brake 70 can be braked by each lock member 50.

  When the baby carriage 1 is traveled again, the pedal portion 51b provided on the left caster 10 is pushed up. When the pedal portion 51b of the left caster 10 is pushed up, the lock member 50 moves from the lock position P1 shown in FIG. 7 to the release position P2 shown in FIG.

  When the left lock member 50 moves to the release position P2 shown in FIG. 8, the wire member 60 is pushed back by the left lock member 50. In conjunction with this, the right lock member 50 is pushed out by the wire member 60 and moves from the lock position P1 shown in FIG. 10 to the release position P2 shown in FIG.

  When each lock member 50 is located at the release position P <b> 2, the locking projection 52 is separated from the locking groove 73 a provided on the wheel 70, and the restriction on the relative rotation of the axle 80 with respect to the rotating body 40 is released. Thereby, the lock | rock of the wheel 70 by the right-and-left locking member 50 is cancelled | released in response, and the baby carriage 1 can be drive | worked again.

  As described above, according to the embodiment, the baby carriage main body 2 having the pair of front legs 3 and the pair of casters 10 connected to the corresponding front legs 3 are provided, and each caster 10 is fixed to the front legs 3. The fixed body 20, the rotating body 40 connected to the fixed body 20 so as to be rotatable with respect to the caster axis Ac, and the rotating body so as to be rotatable with respect to the rotating body 40. Wheel 70 supported by wheel 40 via axle 80, lock position P1 that engages wheel 70 and restricts relative rotation of wheel 70 relative to rotating body 40, and rotation of wheel 70 away from wheel 70. And a lock member 50 attached to the rotating body 40 so as to be movable between the release position P2 for releasing the lock on the body 40, and the lock members 50 of the pair of casters 10 are connected to each other. The wire member 60 is connected via a wire member 60 as a step. When the lock member 50 of one caster 10 moves to the lock position P1, the wire member 60 moves the lock member 50 of the other caster 10 to the lock position P1. In this way, each lock member 50 is connected. According to such a form, when the lock member 50 of one caster 10 on the front wheel side is moved to the lock position P1, the lock member 50 of the other caster 10 is also moved to the lock position P1 in conjunction with this. Can do. For this reason, the operator can easily lock both the wheels 70 on the front wheel side by operating the lock member 50 of the one caster 10 on the front wheel side in a state where the handle 7 is in the facing pressing position P4. Is possible.

  Further, according to the present embodiment, the wire member 60 as the connecting means moves the lock member 50 of the other caster 10 to the release position P2 when the lock member 50 of the one caster 10 moves to the release position P2. When the lock member 50 of the other caster 10 is moved to the release position P2, the lock member 50 of one caster 10 is moved to the release position P2. According to such a form, when the lock member 50 of one caster 10 on the front wheel side is moved to the release position P2, the lock member 50 of the other caster 10 is also moved to the release position P2 in conjunction with this. Can do. For this reason, the operator can easily lock the both wheels 70 on the front wheel side by operating the lock member 50 of one of the casters 10 on the front wheel side in a state where the handle 7 is in the facing pressing position P4. It becomes possible to cancel.

  Moreover, according to this Embodiment, the fixed body 20 and the rotary body 40 are connected so that relative rotation is possible via the caster axis | shaft 30 extended along the caster axis line Ac, and the wire material 60 which comprises a connection means. Passes through the caster shaft 30 along the caster axis Ac. When the rotating body 40 rotates relative to the fixed body 20, the movement of the caster shaft 30 that defines the caster axis Ac is relatively small due to the rotation. Therefore, when the wire member 60 passes through the caster shaft 30 along the caster axis line Ac, the wire member 60 is not easily affected by fluctuations in movement due to rotation. As a result, it is possible to further reduce the risk of the wire material 60 being twisted by the rotation of the rotating body 40 relative to the fixed body 20.

  Further, according to the present embodiment, the connecting means is made of a wire material, and the movable side pipe 65 as a movable side cylindrical body that guides the wire material 60 is fixed to the rotating body 40, so that the wire material 60 is fixed. A fixed side pipe 66 as a side cylindrical body is fixed to at least one of the fixed body 20 or the baby carriage main body 2, and the movable side pipe 65 is separated from the fixed side pipe 66. By separating the movable side pipe 65 and the fixed side pipe 66 from each other, even if the rotating body 40 rotates with respect to the fixed body 20, the possibility that the wire material 60 and the pipes 65, 66 are largely twisted is greatly reduced. Can do.

  Here, the exposed portion 60a of the wire member 60 exposed from the two pipes 65 and 66 between the movable side pipe 65 and the fixed side pipe 66 is not restricted by the two pipes 65 and 66, and thus freely deforms. It is easy to twist. In this regard, in the present embodiment, the end portion 65a of the movable side pipe 65 located on the fixed side pipe 66 side and the end portion 66a of the fixed side pipe 66 located on the movable side pipe 65 side are the hollow space of the caster shaft 30. 30a. In this case, the exposed portion 60a of the wire member 60 exposed from the two pipes 65 and 66 is accommodated in the caster shaft 30 that is not easily affected by fluctuations in movement due to rotation. For this reason, it is possible to further reduce the risk of the exposed portion 60a being twisted.

  In addition, according to the present embodiment, each lock member 50 includes the locking protrusion 52, and each wheel 70 has the lock member 50 when the corresponding lock member 50 is located at the lock position P1. A locking groove 73a for receiving the locking projection 52 is provided. According to such a form, when the locking protrusion 52 of the lock member 50 is accommodated in the locking groove 73a of the wheel 70, the relative rotation of the wheel 70 with respect to the rotating body 40 can be stably regulated.

  Further, according to the present embodiment, the lock member 50 includes the pedal portion 51b that switches between the lock position P1 and the release position P2 when operated by the operator. In this case, it is possible to more easily switch between the lock position P1 and the release position P2 by operating the pedal portion 51b.

  In the above-described embodiment, the example in which the lock position P1 and the release position P2 of the lock member 50 are switched by operating the pedal portion 51b provided on the lock member 50 of the left caster 10 has been described. It is not limited to such an example. As another example, a changeover switch may be interposed between the wire members 60 that connect the lock members 50 of the left and right casters 10. The changeover switch is attached to the handle 7, for example. By operating the changeover switch with the operator's hand, the lock position P1 and the release position P2 of the lock member 50 can be switched.

  Moreover, in embodiment mentioned above, as shown in FIG. 1, the example with which the wheel holding body 100 which hold | maintains the wheel 70 rotatably was attached to the pair of rear legs 5 while maintaining the direction of the wheel 70 constant was attached. Although shown, it is not limited to such an example. The pair of rear legs 5 may also be provided with casters that hold the wheel 70 rotatably while allowing the direction of the wheel 70 to be changed. In particular, in such an example, a switching mechanism that can automatically switch the direction of the wheel 70 between the state in which the caster can change the direction of the wheel 70 with reference to the caster axis Ac according to the position of the handle 7. Is preferably provided. The switching mechanism can change the direction of the wheel 70 in the caster attached to the leg located on the front side in the traveling direction according to the position of the handle 7 and is attached to the leg located on the rear side in the traveling direction. The direction of the wheel 70 in the caster is kept constant. As the configuration of such a switching mechanism, a known configuration, for example, a configuration disclosed in JP2008-254688A can be adopted, and thus detailed description thereof is omitted.

  In the above-described embodiment, as can be understood from FIGS. 3 and 4, the example in which the pedal portion 51b that switches between the lock position P1 and the release position P2 is provided only on the left caster 10 is shown. It is not limited to such an example. The pedal portion 51b may also be provided on the right caster 10. 12 and 13 show examples in which the right caster 10 is also provided with a pedal portion 51b. 12 shows a state in which the lock member 50 of the right caster 10 is arranged at the lock position P1, and FIG. 13 shows a state in which the lock member 50 of the right caster 10 is arranged in the release position P2. .

  As shown in FIGS. 12 and 13, the right pedal portion 51 b is more when the lock member 50 is positioned at the lock position P <b> 1 (see FIG. 12) than when the lock member 50 is positioned at the release position P <b> 2 (see FIG. 13). It is located above. On the other hand, as shown in FIGS. 7 and 8, the pedal portion 51b on the left side is located at the release position P2 (see FIG. 8) when the lock member 50 is located at the lock position P1 (see FIG. 7). Is located on the upper side.

  Therefore, when the brakes are applied to the wheels 70 by the lock members 50, the left and right lock members 50 are moved to FIGS. 8 and 13 by stepping on the left pedal portion 51b (see FIG. 8) positioned relatively upward. It can be moved from the release position P2 shown to the lock position P1 shown in FIGS. On the other hand, when releasing the brake of the wheel 70 by each lock member 50, the right and left lock members 50 are moved to the left and right lock members 50 by stepping on the right pedal portion 51b (see FIG. 12) positioned relatively upward. Can be moved from the lock position P1 shown in FIG. 8 to the release position P2 shown in FIGS.

  Thus, according to this modification, the switching of the braking and release of the wheel 70 by each lock member 50 can be operated by stepping on the left or right pedal portion 51b that is positioned relatively above. Therefore, it is possible to easily switch the braking and release of the wheel 70 by each lock member 50 in a posture with less work load.

DESCRIPTION OF SYMBOLS 1 Stroller 3 Front leg 4 Front connection member 5 Rear leg 6 Handle 10 Caster 20 Fixed body 30 Caster shaft 40 Rotating body 44 Support point pin 50 Lock member 51 Pedal part 52 Locking protrusion 53 Wire attachment part 60 Connection means (wire material)
65 Movable cylinder (movable pipe)
66 Fixed side tubular body (fixed side pipe)
70 Wheel 73a Locking groove 80 Axle Ar Rotation axis Ac Caster axis P1 Lock position P2 Release position P3 Back side push position P4 Face-to-face push position

Claims (7)

A baby carriage body having a pair of front legs;
A pair of casters connected to the corresponding front legs;
With
Each caster
A fixed body fixed to the front leg;
A rotating body connected to the fixed body so as to be rotatable with respect to the fixed body about a caster axis;
A wheel supported by the rotating body via an axle so as to be rotatable with respect to the rotating body;
It is possible to move between a lock position that engages with the wheel and restricts relative rotation of the wheel with respect to the rotating body, and a release position that is separated from the wheel and releases the lock of the wheel with respect to the rotating body. A locking member attached to the rotating body,
Including
The lock members of the pair of casters are connected to each other via a connecting means,
The connecting means is connected to each lock member so that when the lock member of one of the casters moves to the lock position, the lock member of the other caster moves to the lock position ,
The connecting means includes a wire material for connecting the lock members of the pair of casters,
A movable cylindrical body for guiding the wire material is fixed to the rotating body,
A fixed cylindrical body for guiding the wire material is fixed to at least one of the fixed body or the baby carriage body;
The movable side tubular body is separated from the fixed side tubular body,
The fixed body and the rotating body are connected so as to be relatively rotatable via a caster shaft extending along the caster axis.
A baby carriage in which a wire material constituting the connecting means passes through the caster shaft .   The end portion of the movable side tubular body located on the fixed side tubular body side and the end portion of the fixed side tubular body located on the movable side tubular body side are located within a caster shaft. The baby carriage according to 1.   The baby carriage according to claim 1 or 2, wherein an end portion of the wire member is rotatably held by the lock member. The connection means is configured to move the lock member of the other caster to the release position when the lock member of one of the casters moves to the release position . The baby carriage according to one item . Each locking member includes a locking projection,
Each wheel, locking grooves corresponding locking member to receive the locking projection of the locking member when located at the lock position is provided, according to any one of claims 1 to 4 Baby carriage . The baby carriage according to any one of claims 1 to 5, wherein the lock member of the one of the casters includes a pedal portion that switches between the lock position and the release position when operated by an operator. . The lock member of the other caster also includes a pedal portion that switches between the lock position and the release position when operated by an operator.
The pedal portion of the lock member of the one caster is positioned higher when the lock member is positioned at the release position than when the lock member is positioned at the lock position.
Pedal portion of the locking member of the other of the caster, who when said locking member is positioned in the locking position than when located in the release position is so positioned above, claim 6 Baby carriage as described in

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