JP2005132245A - Folding buggy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding buggy capable of being compact in its height direction in a folded-up state while rigidity in the opened state of the buggy is kept high. <P>SOLUTION: The folding buggy 100 is structured to be folded up in such a fashion that four wheels approach in directions fore and aft and right and left and is equipped with a lower frame structure 101 and a push rod 102 in an inverted U-shape. The push rod 102 has a pair of side vertical rods 103 extending in the vertical direction and a top crosswise rod 104 coupling tops of the side vertical rods 103, wherein each side vertical rod 103 includes an upper rod 103a and a lower rod 103b. The top crosswise rod 104 can have the same width direction length without a risk of being folded substantially in both states as the buggy 100 being in an open state and a folded-up state. The bottom of each upper vertical rod 103a is coupled with tops of the lower vertical rods 103b by an angle locking means 110 in such a way as being folded in the direction fore and aft. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a foldable baby carriage, and more particularly to a foldable baby carriage that is folded so that four wheels approach the front and rear and the left and right.

  1 and 2 show a baby carriage disclosed in Japanese Patent Application Laid-Open No. 8-58599. FIG. 1 shows an opened state of the baby carriage, and FIG. 2 shows a folded state of the baby carriage. As apparent from a comparison between FIGS. 1 and 2, the baby carriage 1 is folded so that the four wheels 4 and 6 approach the front and rear and the left and right.

  The illustrated baby carriage 1 includes a vehicle body 2 mainly composed of a rod-shaped member, and a seat hammock 3 attached to the vehicle body 2 to form a seat. The baby carriage body 2 includes a pair of front legs 5 having a front wheel 4, a pair of rear legs 7 having a rear wheel 6, a pair of handrail members 8 positioned above both sides of the seating surface, and each rear leg 7. And a pair of reversing members 9 rotatably attached to the rear end portions of the pair of handrail members 8 and a push bar 10 having an inverted U-shape extending upward.

  The push rod 10 includes a pair of side vertical bars 11 linearly extending in the vertical direction in parallel relation, and an upper connecting member 12 connecting the upper ends of the pair of side vertical bars 11. The upper connecting member 12 receives the side vertical bar 11 and is connected to the center of the pair of rotating members 12a and the pair of rotating members 12a that are configured to be able to rotate around the side vertical bar 11. Member 12b. Each rotating member 12a and the central member 12b are connected so as to be bent as shown in FIG.

  The lower frame structure which is located on the four wheels 4 and 6 and forms the seat surface portion of the seat is folded together with the four wheels 4 and 6 so as to approach the front and rear and the left and right. In the folded state shown in FIG. 2, the inverted U-shaped push rod 10 extending upward from both sides of the seat surface portion is reduced in size in the width direction by protruding the center member 12 b forward and bending forward. doing.

  In the baby carriage disclosed in Japanese Patent Application Laid-Open No. 8-58599, the push bar 10 is configured to be foldable forward so that it can be folded while reducing the size in the width direction. Specifically, each rotating member 12a of the upper connecting member 12 can be rotated around each side vertical bar 11, and the tip of each rotating member 12a and the central member 12b are connected so as to be bendable. Yes.

  As described above, in the baby carriage shown in FIGS. 1 and 2, the push rod 10 is composed of a plurality of members, and these members are connected so as to be bent at the joint portion, thereby reducing the size in the width direction of the push rod 10. I can do it. However, due to the presence of the joint portion that enables the size in the width direction to be reduced, the inverted U-shaped push rod 10 generates a relatively large backlash in the joint portion even in the opened state of the baby carriage. Due to the presence of such rattling in the joint portion, the push rod 10 is easily twisted or distorted. Since the twist and distortion starting from the push rod 10 are also transmitted to the lower frame structure, the rigidity of the entire baby carriage in the open state is lowered.

  In order to reduce the bulk in the folded state, the baby carriage is configured to be folded with the dimensions reduced in the front-rear and left-right directions. As shown in FIG. 2, the bulkiness in the front-rear and left-right directions is certainly small in the folded state of the baby carriage. However, even in the folded state, the push bar 10 protrudes high and extends upward, so that the compactness in the height direction is insufficient.

As another prior art, there is a baby carriage disclosed in Japanese Patent Laid-Open No. 2000-159121. In the case of the stroller disclosed in this publication, the position of the grip portion in the front-rear direction can be changed by allowing the upper portion of the push bar to be bent in the front-rear direction. The reason why the position of the grip portion can be changed is to adapt to the physique and preferences of the person pushing the baby carriage. Even in this publication, there is no suggestion about the necessity of compactness in the height direction when the baby carriage is folded.
JP-A-8-58599 JP 2000-159121 A

  The present invention presupposes a folding baby carriage in which four wheels are folded so as to approach in the front-rear and left-right directions, and the object thereof is to maintain a high rigidity in the opened state of the baby carriage and to increase the height in the folded state. It is to be able to realize direction compactness.

  The present invention is a foldable baby carriage in which four wheels are folded back and forth and left and right, and includes a lower frame structure and an inverted U-shaped push rod. The lower frame structure is positioned on the four wheels to form a seat surface portion of the seat, and is folded so as to approach the front and rear and the left and right together with the four wheels. The inverted U-shaped push bar extends upward from the lower frame structure. The push rod includes a pair of side vertical bars extending in the vertical direction and an upper end horizontal bar connecting the upper ends of the pair of side vertical bars. Each of the pair of side vertical bars includes an upper vertical bar portion and a lower vertical bar portion that are positioned above and below. The upper end horizontal bar has the same length in the width direction without being bent substantially in both the opened state and the folded state of the baby carriage. The lower end of each upper vertical bar part is connected to the upper end of each lower vertical bar part so that it can be bent in the front-rear direction.

  According to the present invention having the above configuration, since the inverted U-shaped push rod is configured so as not to be bent substantially in both the open state and the folded state, the push rod is increased in rigidity and accordingly the open state is opened. The rigidity of the baby carriage as a whole increases.

  Usually, when it is going to raise the rigidity of a baby carriage, the thickness of the rod-shaped member which comprises a vehicle body is enlarged, or a reinforcement member is attached. That is, it is common to accept an increase in the weight of the stroller as a price to increase the stiffness. On the other hand, in the present invention, since the joint portion for reducing the length in the width direction of the push bar is not necessary, the structure of the push bar itself can be reduced in weight and simplified, and the weight of the entire baby carriage can be reduced. That is, according to the present invention, it is possible to realize a weight reduction by simplifying the structure while increasing the rigidity, contrary to conventional technical common sense.

  Further, if the upper vertical bar portion of the pair of side vertical bars is folded forward in the folded state of the baby carriage, the height of the push bar is reduced, and the compactness in the height direction in the folded state can be realized.

  The baby carriage is preferably provided with angle locking means for fixing the upper vertical bar portion at a plurality of angular positions bent in the front-rear direction.

  In one embodiment, the baby carriage includes a bending shaft that rotatably connects the lower end of the upper vertical bar portion and the upper end of the lower vertical bar portion. In this case, the angle lock means has the first concave and convex inner teeth formed around the bending shaft at the lower end of the upper vertical bar portion, and the bending shaft at the upper end of the lower vertical bar portion. The second internal teeth having an irregular shape formed in an annular shape and the external tooth member having an irregular shape meshing with each of the first and second internal teeth. The external tooth member is movable along the bending shaft, and by this movement, the first state meshes with both the first and second internal teeth, and one of the first and second internal teeth It is possible to selectively take the second state of meshing only with. The angle lock means further biases the external tooth member in the second state against the biasing force of the biasing member, and a biasing member that biases the external tooth member to move in the first state. And an angle unlocking operation button for moving so that.

  Preferably, each side vertical bar includes a lower region extending in parallel from the lower end to a predetermined height in the opened state of the baby carriage, and an upper region in which the interval becomes narrower as it goes upward. In this case, it is desirable that the connection point between the upper vertical bar portion and the lower vertical bar portion is located in the upper region. The height of the lower region of the pair of side vertical bars should be approximately the same as the height of the shoulder of the child seated on the seat. In this way, a large seating space can be provided for the child.

  The push bar may be fixed to the body of the baby carriage, or may be provided so as to be switchable between a back-pressing state and a face-to-face pressing state.

  An embodiment of the present invention will be described with reference to the drawings. 3 is a front view of the baby carriage 20, FIG. 4 is a side view thereof, FIG. 5 is a perspective view thereof, and FIG. 6 is a rear view of the folded state.

  The illustrated baby carriage 20 is folded so that the four wheels 21 and 22 approach the front and rear and the left and right. The baby carriage 20 has, as a basic frame structure, a pair of front legs 23 having front wheels 21, a pair of rear legs 24 having rear wheels 22, and front and rear sides on both sides of the seat surface to support the seat surface from below. A pair of seating surface support side bars 25 extending in the direction, a pair of handrail members 29 located above both sides of the seating surface, and an inverted U-shape extending upward from both sides of the seating surface A front leg connecting member 27 passed between the pair of front legs 23, a rear leg connecting member 28 passed between the pair of rear legs 24, and a front guard member passed between the pair of handrail members 29. 30 and a bent link member 26 that is passed between the front end portions of the pair of seating surface support side bars 25.

  In order to realize the folding operation of the baby carriage 20, the upper end portion of the front leg 23 and the upper end portion of the rear leg 24 are respectively connected to the handrail member 29 so as to be rotatable. At the time of folding, the front and rear wheels 21 and 22 approach each other.

  The front end portion of the seat support side member 25 is rotatably connected to the front leg 23, and the rear end portion is rotatable to the reversing member 31 via the connecting member 32 and the connecting shaft 46 (FIGS. 12 to 14). Connected.

  The inverted U-shaped push rod 40 includes a pair of side vertical bars 41 extending upward from both side portions of the seat surface portion, and an intermediate bar 43 connecting the pair of side vertical bars 41. A rear end portion of the handrail member 29 is rotatably connected to the side vertical bar 41 via a connecting shaft 47. As will be described in detail later, the lower end portion of the side vertical bar 41 is rotatably connected to the reversing member 31 via a connecting shaft 46. As shown in FIG. 5, between the pair of side vertical bars 41, a back belt 33 that supports a backrest portion (not shown) of the seat hammock from behind is passed.

  In order to allow the left and right wheels to approach each other during folding and the width direction dimension can be reduced, the bending link member 26 connecting the pair of seating surface supporting side bars 25 is provided so as to be bent upward. Yes. Specifically, as shown in FIG. 3, the bending link member 26 has a central link bar 26a and a pair of side link bars 26b that are connected so as to be bent, and the outer end of each side link bar 26b. The part can be rotated on the seat support side bar 25.

  The rear leg connecting member 28 connecting between the pair of rear legs 24 and the front leg connecting member 27 connecting between the pair of front legs 23 are also provided so as to be bendable, like the bent link member 26. Yes. The front guard member 30 that connects the pair of handrail members 29 is formed of a flexible material so that the left and right end portions can be brought closer together with the folding operation.

  With reference to FIGS. 12-14, the connection structure of the side part vertical bar 41 of the push bar 40, the rear leg 24, and the seat surface support side bar 25 is demonstrated. In addition, the shape of the seating surface supporting side bar 25 will be described. 12 shows an opened state of the baby carriage, FIG. 13 shows a halfway state of the folding operation, and FIG. 14 shows a folded state.

  A connecting member 32 is fixed to the rear end of the seating surface support side bar 25. As is clear from FIG. 12, the seating surface support side bar 25 integrally has an inwardly extending portion 25a that protrudes inward at the rear portion thereof. Specifically, the inwardly extending portion 25a is formed by bending a portion extending rearward beyond the connecting member 32 into a U shape. The inward projecting portion 25a supports the seat surface from below. Since the rear portion of the seat surface is stably supported by the inwardly extending portion 25a of the rigid seat surface support side bar 25, there is no depression of the rear portion of the seat surface, and the posture of the child seated on the baby carriage seat It can be kept appropriate. The inward extending portions 25a of the pair of seating surface supporting side bars 25 approach each other as the baby carriage is folded. In order to prevent this folding operation from being hindered and to make the width dimension of the folded state as small as possible, it is necessary to appropriately select the interval between the left and right inward extending portions 25a. Specifically, as shown in FIG. 6, a dimensional relationship such that the left and right inwardly extending portions 25a are in close contact with each other in the folded state of the baby carriage is preferable.

  A reversing member 31 is rotatably attached to each rear leg 24 via a connecting pin. In the opened state of the baby carriage shown in FIG. 12, the reversing member 31 is positioned along the rear leg 24 above the connecting pin. In the folded state of the baby carriage shown in FIG. 14, the reversing member 31 is located below the connecting pin. It is located along the rear leg 24.

  The lower end of each side vertical bar 41 of the push rod 40 is rotatably connected to the tip portion of the reversing member 31 via a connecting shaft 46. As apparent from comparison of FIGS. 12 to 14, the connecting shaft 46 includes a rear end portion of the seating surface supporting side bar 25, a tip portion of the reversing member 31, and a lower end portion of the side vertical bar 41. , Which are pivotably connected.

  A slide member 34 that can slide in the vertical direction is provided at a lower end portion of the side vertical bar 41 of the push bar 40. The slide member 34 is operatively connected to an operation button 45 (see FIG. 3) provided on the intermediate rod 43 of the push rod 40 via a wire passing through the push rod 40. If the operation button 45 is operated, the slide member 34 can be moved upward. Although not shown, a downward biasing force is always applied to the slide member 34 by a spring.

  In the opened state of the baby carriage shown in FIG. 12, the slide member 34 engages with the reversing member 31 and prohibits the movement of the reversing member 31. When the baby carriage is folded, the operation button 45 is operated to move the slide member 34 upward, and the engagement state between the slide member 34 and the reversing member 31 is released.

  Next, the structure of the inverted U-shaped push rod 40 will be described mainly with reference to FIGS. As shown in the figure, a pair of side vertical bars 41 of the push rod 40 includes a lower region 41a extending in parallel from the lower end portion to a predetermined height in the opened state of the baby carriage, and an upper region in which the interval becomes narrower as it goes upward. 41b and a horizontal region 41c extending inward in the width direction from the upper end of the upper region 41b. The intermediate bar 43 connects between the inner ends of the horizontal regions 41 c of the pair of side vertical bars 41.

  Preferably, the height of the lower region of the side vertical bar 41 is substantially the same as the height of the shoulder of the child seated on the seat. In this way, a wide seating space can be provided for the child who sits.

  Each side vertical bar 41 includes an upper vertical bar portion and a lower vertical bar portion which are positioned above and below. The lower end of the upper vertical bar portion is connected to the upper end of the lower vertical bar portion so that it can be bent in the front-rear direction. A connection point between the upper vertical bar portion and the lower vertical bar portion is surrounded by a circle A in FIGS. 3 and 4. As shown in the figure, the connection point is located in the upper region 41 b of the side vertical bar 41. The connection structure and operation of these upper and lower vertical bar portions will be described in detail with reference to the baby carriage shown in FIGS.

  Also in the embodiment shown in FIGS. 3 to 17, the upper vertical bar portion can be bent in the front-rear direction at the connection point A, but the description thereof is omitted.

  The push bar 40, which is composed of a pair of side vertical bars 41 and an intermediate bar 43 and has an inverted U shape, maintains the same shape without being bent substantially in both the opened state and the folded state of the baby carriage. Here, “substantially does not bend” means that there is no bending that decreases the length in the width direction. In other words, the upper vertical bar portion of the side vertical bar is allowed to bend back and forth with respect to the lower vertical bar portion.

  The reason why the interval decreases as the upper region 41b of the pair of side vertical bars 41 goes upward is to reduce the folding size of the baby carriage. The width dimension formed by the horizontal region 41c of the pair of side vertical bars 41 and the intermediate bar 43 hardly changes in both the opened state and the folded state of the baby carriage.

  In the illustrated embodiment, each side vertical bar 41 of the push bar 40 has a cover member 42 that covers a bar portion extending from the horizontal region 41c to the upper part of the upper region 41b. By having this cover member 42, the thickness of the portion gripped by the person operating the baby carriage can be made moderate. Moreover, as shown in FIG. 7, the cover member 42 has the overhang | projection part 42a protruded to the outer side in the both sides. As shown in FIG. 6, the distance W1 between the pair of overhang portions 42a is preferably substantially the same as the length W2 between the outer surfaces of the left and right wheels 22 in the folded state. With such a dimensional relationship, the width of the folded state can be reduced. Even if the distance between the upper region 41b of the pair of side vertical bars 41 is reduced, the pair of overhanging portions are present, so that the person who operates the baby carriage moves the position of placing both hands to 1 It can be spread between the pair of overhanging portions 42a, and the moving operation becomes easy.

  The intermediate bar 43 of the push bar 41 and each side vertical bar 41 are connected in a state where three-dimensional movement is limited. Here, the three-dimensional movement means forward / backward, up / down, and left / right movement. A specific example of such a connection structure will be described with reference to FIGS. The intermediate bar 43 and each side vertical bar 41 actually have a space inside, but in FIG. 8 and FIG. 9, they are shown as solid for the sake of simplicity.

  The intermediate bar 43 has peripheral walls 43a at both ends thereof for receiving the tip of the side vertical bar 41 and restricting forward / backward and vertical movement. The peripheral wall 43a of the intermediate bar 43 and the tip of each side vertical bar 41 are connected by a pin 44 extending in the front-rear direction. 9 is a cross-sectional view taken along line 9-9 in FIG. Since the peripheral wall 43a of the intermediate bar 43 is located around the tip of each side vertical bar 41, the side vertical bar 41 extends in the front-rear direction (the axial direction of the pin 44, that is, the vertical direction in FIG. 8). Bending and bending in the vertical direction (vertical direction in FIG. 9) is limited. In addition, since the pin 44 connects the peripheral wall 43a of the intermediate bar 43 and the tip of the side vertical bar 41, the movement of the side vertical bar 41 in the left-right direction is limited.

  A small clearance exists between the tip of each side vertical bar 41 and the peripheral wall 43 a of the intermediate bar 43. The size of the clearance is such that the horizontal region 41c of the pair of side vertical bars 41 and the intermediate bar 43 are maintained in a substantially straight state even in the folded state, while the lower region 41a of the pair of side vertical bars 41 is maintained. The lower ends are chosen to allow them to approach each other with the folding action of the lower frame structure that forms the seat surface of the baby carriage.

  10 and 11 schematically show the operation of the push bar 40 in an exaggerated manner. FIG. 10 shows the shape of the push bar 40 in the opened state of the baby carriage, and FIG. 11 shows the shape of the push bar 40 in the folded state of the baby carriage. The distance between the lower ends of the pair of side vertical bars 41 of the push rod 40 is reduced from the width dimension D1 in the open state to the width dimension D2 in the folded state. While the width dimension between the lower end portions of the pair of side vertical bars 41 can be reduced, the straight state between the horizontal region 41c of the side vertical bars 41 and the intermediate bar 43 is the open state and folding of the baby carriage. Almost no change in both states.

  The lower frame structure of the baby carriage is folded so as to approach the front and rear and the left and right together with the four wheels 21 and 22, but the inverted U-shaped push rod 40 is substantially in both the opened state and the folded state. Keep almost the same shape without bending. Therefore, the rigidity of the push bar 40 is increased, and accordingly, the rigidity of the baby carriage in the open state is increased.

  The pair of side vertical bars 41 of the push bar 40 shown in FIGS. 10 and 11 can be bent in the front-rear direction with respect to the lower vertical bar part, and the baby carriage shown in FIG. In the folded state, in order to reduce the height of the push rod 40, the upper vertical bar portion is largely bent forward. FIG. 11 does not show such a form of bending. This will be described in connection with the embodiment shown in FIGS.

  The lower frame structure preferably has a connection structure that allows the inclination of the side vertical bar 41 of the push bar 40 accompanying the transition from the open state to the folded state. This will be described with reference to FIGS.

  FIG. 15 is a cross-sectional view showing a connecting portion between the side vertical bar 41 and the handrail member 29. The handrail member 29 has a pair of rear projecting walls 29a projecting rearward at the rear end thereof. The side vertical bar 41 is received in the pair of rearward projecting walls 29a. As shown in the drawing, the rear protruding wall 29a of the handrail member 29 has a contact wall surface 29b that passes through the connecting shaft 47 and contacts the side vertical bar 41, and is positioned above and below the contact wall surface 29b. And a separation wall surface 29c that forms a gap with the rod 41. Due to the presence of the separation wall surface 29c, the side vertical bar 41 can be slightly tilted when the baby carriage is folded, as indicated by an imaginary line in FIG.

  FIG. 16 is a modification of the structure shown in FIG. In the structure shown in FIG. 16, the rear protruding wall 50 of the handrail member has a flat plate shape with the same thickness. A spacer 51 is disposed between the rear overhanging wall 50 and the side vertical bar 41. Due to the presence of the spacer 51, a separation wall surface 50 a is formed on the rear overhanging wall 50 of the handrail member. The spacer 50 forms a contact wall surface. Even with such a structure, the side vertical bar 41 can be allowed to tilt.

  FIG. 17 shows a connecting portion between the lower end portion of the side vertical bar 41 and the reversing member 31. As illustrated, a spacer 52 is disposed between the side vertical bar 41 and the reversing member 31. The spacer 52 forms a contact wall surface. Due to the presence of the spacer 52, a separation wall surface 31 a is formed on the reversing member 31. Therefore, the inclination of the side vertical bar 41 can be allowed in the folded state of the baby carriage.

  18 to 23 show another embodiment of the present invention. The structure of the illustrated baby carriage 100 is substantially the same as that of the embodiment shown in FIGS. In the description of the previous embodiment, it has not been described in detail that the upper vertical bar portion of the push bar can be bent in the front-rear direction, so this point will be described in detail with reference to FIGS.

  A baby carriage 100 shown in FIGS. 18 and 19 is folded so that four wheels approach the front and rear and the left and right, and has a lower frame structure 101 and an inverted U that rises upward from the lower frame structure 101 and extends. And a shaped push bar 102. The lower frame structure 101 is positioned on the four wheels to form a seat surface portion of the seat, and is folded together with the four wheels so as to approach the front and rear and the left and right.

  The push rod 102 includes a pair of side vertical bars 103 extending in the vertical direction and an upper end horizontal bar 104 connecting the upper ends of the pair of side vertical bars 103. Each side vertical bar 103 includes an upper vertical bar part 103a and a lower vertical bar part 103b which are positioned above and below. Similar to the baby carriage shown in FIGS. 3 to 6, the upper end horizontal bar 104 has the same length in the width direction without being bent in both the opened state and the folded state of the baby carriage 100.

  The lower end of each upper vertical bar portion 103a is connected to the upper end of each lower vertical bar portion 103b so that it can be bent in the front-rear direction, as indicated by phantom lines in FIGS. The angle lock means 110 in the connecting portion is for fixing the upper vertical bar portion 103a at a plurality of angles bent in the front-rear direction. The structure of the angle lock means 110 will be described in detail later.

  When the baby carriage 100 is moved and operated, the upper vertical bar portion 103a is brought to an optimal angular position and fixed according to the height and preference of the pusher. When the baby carriage is folded, in order to reduce the height of the push bar 102 and achieve compactness in the height direction of the baby carriage 100, the upper vertical bar portion 103a is largely bent forward as shown in FIG. . Thereby, the bulk of the baby carriage 100 in the folded state including the height can be reduced.

  Next, the structure of the angle lock means 110 will be described in detail with reference to FIGS. The lower end of the upper vertical bar portion 103a of the push rod 103 and the upper end of the lower vertical bar portion 103b are connected to each other via a bending shaft 114 so as to be rotatable.

  An upper end sleeve member 111 is fixedly attached to the upper end of the lower vertical bar portion 103b of the push rod 103, and a lower end sleeve member 115 is fixedly attached to the lower end of the upper vertical bar portion 103a. FIG. 21 shows the upper end sleeve member 11, and FIG. 22 shows the lower end sleeve member 115.

  The upper end sleeve member 111 shown in FIG. 21 has concave and convex inner teeth 112 formed in an annular shape around a central hole 113 through which the bending shaft 114 is inserted. Further, the lower end sleeve member 115 shown in FIG. 22 has concave and convex inner teeth 116 formed in an annular shape around a center hole 117 through which the bending shaft 114 is inserted.

  The outer tooth member 119 shown in FIG. 23 has a center hole 120 through which the bending shaft 114 is inserted at the center thereof, and also has an uneven shape that meshes with the inner teeth 112 of the upper end sleeve member 111 and the inner teeth 116 of the lower end sleeve member 115, respectively. have. The external tooth member 119 is movable along the bending shaft 114, and by this movement, a first state in which both of the internal teeth 112 and 116 are engaged, and a second state in which one of the internal teeth is engaged. Can be taken selectively. If the external tooth member 119 is in the first state, the position of the upper vertical bar portion 103a is fixed, and if it is in the second state, the upper vertical bar portion 103a can be bent in the front-rear direction.

  FIG. 20 shows a state in which the outer tooth member 119 is engaged with the inner teeth 112 of the upper end sleeve member 111 and the inner teeth 116 of the lower end sleeve member 115 to inhibit the movement of the upper vertical bar portion 103a in the front-rear direction (first step). State). A spring 121 disposed between the upper end sleeve member 111 and the external tooth member 119 urges the external tooth member 119 to be in the first state shown in FIG.

  The angle lock release operation button 122 attached to the lower end sleeve member 115 so as to be displaceable is for moving the external tooth member 119 so as to be in the second state against the urging force of the spring 121. . In the second state, the external tooth member 119 engages only with the internal teeth 112 of the upper end sleeve member 111 and is disengaged from the internal teeth 116 of the lower end sleeve member 115. Therefore, the upper vertical bar portion 103a can be rotated in the front-rear direction.

  As shown in FIG. 22, the lower end sleeve member 115 is formed with a receiving hole 118 that receives the claw provided at the tip of the operation button 122 in a displaceable manner.

  24 and 25 show another embodiment of the present invention. The baby carriage 200 shown in the figure is different from the baby carriage 100 shown in FIGS. 18 to 23 only in that the push bar 202 can be switched between a back pushing state and a face pushing state. The point is substantially the same.

  FIG. 24 shows the baby carriage 200 in a state of being pushed back, and FIG. 25 shows the baby carriage 200 in a state of being face-to-face pushed. As shown in the figure, the baby carriage 200 includes a lower frame structure 201 and an inverted U-shaped push bar 202 that rises upward from the lower frame structure 201 and extends. The lower end of the push rod 202 is rotatably connected to the lower frame structure 201.

  The push rod 202 includes a pair of side vertical bars 203 that extend in the vertical direction and an upper end horizontal bar 204 that connects the upper ends of the pair of side vertical bars 203. Each side vertical bar 203 includes an upper vertical bar part 203a and a lower vertical bar part 203b which are positioned vertically. The lower end of the upper vertical bar portion 203a is connected to the upper end of the lower vertical bar portion 203b via the angle lock means 210 so that it can be bent in the front-rear direction.

  When the baby carriage 200 is moved and operated in the face-to-face pressing state shown in FIG. 25, the person holds the upper end horizontal bar 204 of the push bar 203. At this time, the human foot may hit the front wheel. Therefore, as shown by a solid line in FIG. 25, if the upper vertical bar portion 203a is bent backward in the traveling direction (right side direction in FIG. 25), the upper end horizontal bar that can be grasped by the hand of the person who operates the baby carriage. Since the position 204 moves away from the front wheel, contact between the foot and the front wheel can be avoided.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The present invention can be advantageously applied to a folding baby carriage in which four wheels are folded so as to approach the front and rear and the left and right.

It is a perspective view which shows the baby carriage disclosed by Unexamined-Japanese-Patent No. 8-58599. It is a perspective view which shows the folding state of the baby carriage of FIG. It is a front view of one embodiment of the present invention. FIG. 4 is a side view of the baby carriage shown in FIG. 3. It is a perspective view of the baby carriage shown in FIG. It is a rear view of the folded state of the baby carriage shown in FIG. 3 is a front view of a push rod 40. FIG. It is sectional drawing which shows the connection part of the side part vertical bar and intermediate bar of a push bar. It is sectional drawing seen along line 9-9 of FIG. It is the figure which showed typically the shape of the push bar in the open state of the baby carriage. It is the figure which showed typically the shape of the push bar in the folded state of the baby carriage. It is a perspective view which shows the connection part of a side part vertical bar, a rear leg, and a seat surface support side bar. It is a figure which shows the state in the middle of folding operation | movement of the connection part shown in FIG. It is a figure which shows the folding state of the connection part shown in FIG. It is sectional drawing which shows the connection part of a side part vertical bar and the rear-end part of a handrail member. It is sectional drawing which shows the other example of the connection part of a side part vertical bar and the rear-end part of a handrail member. It is sectional drawing which shows the connection part of the lower end part of a side part vertical bar, and an inversion member. It is a side view which shows other embodiment of this invention. It is a side view which shows the folding state of the baby carriage shown in FIG. It is a fragmentary sectional view which shows the detail of an angle locking means. It is a figure which shows an upper end sleeve member, (a) is sectional drawing seen along line AA of (b), (b) is a front view. It is a figure which shows a lower end sleeve member, (a) is a front view, (b) is sectional drawing seen along line BB of (a). It is a front view which shows an external tooth member. It is a side view which shows other embodiment of this invention, and has shown the state of back pushing. It is a figure which shows the baby carriage of FIG. 24, and has shown the state of facing pressing.

Explanation of symbols

  20 Stroller, 21 Front Wheel, 22 Rear Wheel, 23 Front Leg, 24 Rear Leg, 25 Seat Surface Support Side Bar, 25a Inward Projection, 26 Bending Link Member, 27 Front Leg Connecting Member, 28 Rear Leg Connecting Member, 29 Handrail Member 29a Rear protruding wall, 29b Abutting wall surface, 29c Separating partition wall surface, 30 Front guard member, 31 Reversing member, 31a Separating partition wall surface, 32 Connecting member, 33 Rear belt, 34 Slide member, 40 Push rod, 41 Side vertical bar, 41a lower region, 41b upper region, 41c horizontal region, 42 cover member, 42a overhang, 43 intermediate rod, 43a peripheral wall, 44 connection pin, 45 operation button, 46 connection shaft, 47 connection shaft, 50 rear overhang wall, 50a Separation partition surface, 51 spacer, 52 spacer, 60 seat core, 61 seat core, 62 backrest core, 63 rear belt, 65 front belt, 100 baby carriage, 101 lower frame structure, 102 push bar, 103 side vertical bar, 103a upper vertical bar part, 103b lower vertical bar part, 104 upper end horizontal bar, 110 angle locking means, 111 upper end sleeve member, 112 Inner teeth, 113 center hole, 114 folding shaft, 115 lower end sleeve member, 116 inner teeth, 117 center hole, 118 receiving hole, 119 outer tooth member, 120 center hole, 121 spring, 122 operation button, 200 baby carriage, 201 lower part Frame structure, 202 push bar, 203 side vertical bar, 203a upper vertical bar part, 203b lower vertical bar part, 204 upper side horizontal bar, 210 angle lock means.

Claims (5)

It is a folding baby carriage that is folded so that four wheels approach the front and rear and the left and right,
A lower frame structure that is positioned on the four wheels to form a seating surface portion of the seat and is folded so as to approach the front and rear and the left and right together with the four wheels;
An inverted U-shaped push bar extending upward from the lower frame structure, and
The push rod includes a pair of side vertical bars extending in the vertical direction, and an upper end horizontal bar connecting the upper ends of the pair of side vertical bars,
Each of the pair of side vertical bars includes an upper vertical bar part and a lower vertical bar part positioned above and below,
The upper end horizontal bar has the same length in the width direction without being bent substantially in both the opened state and the folded state of the baby carriage,
The lower end of each upper vertical bar part is a foldable baby carriage connected to the upper end of each lower vertical bar part so as to be foldable in the front-rear direction. The folding baby carriage according to claim 1, further comprising angle locking means for fixing the upper vertical bar portion at a plurality of angular positions bent in the front-rear direction. A bending shaft that rotatably connects the lower end of the upper vertical bar part and the upper end of the lower vertical bar part to each other;
The angle lock means includes
First concave and convex inner teeth formed annularly around the bending axis at the lower end of the upper vertical bar portion;
Concave and convex second internal teeth formed in an annular shape around the bending axis at the upper end of the lower vertical bar portion;
The first and second inner teeth have a concavo-convex shape that meshes with each of the first and second internal teeth, and can move along the bending shaft, and mesh with both the first and second internal teeth by this movement. An external tooth member that selectively takes a state and a second state that meshes with only one of the first and second internal teeth;
A biasing member that biases the external tooth member in a direction to move the external tooth member to the first state;
The folding baby carriage according to claim 2, further comprising an angle lock release operation button for moving the external tooth member so as to be in the second state against an urging force of the urging member. Each side vertical bar includes a lower region extending in parallel from the lower end to a predetermined height in the open state of the baby carriage, and an upper region in which the interval is narrowed toward the upper side,
The foldable baby carriage according to claim 2 or 3, wherein a connection point between the upper vertical bar portion and the lower vertical bar portion is located in the upper region. The foldable baby carriage according to any one of claims 1 to 4, wherein the push bar is provided so as to be switchable between a back-pressed state and a facing-pressed state.

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