JP5894416B2 - Foldable stroller - Google Patents

Description

  The present invention relates to a stroller that can be folded.

  Mount the back of the seat on the foldable vehicle body so that the link mechanism is configured, and when folding the vehicle body, raise the back of the seat forward and store it, making the form of folding compact An realized stroller is known (see, for example, Patent Document 1).

JP 2007-99000 A

  In conventional strollers, the back of the storage position is secured to the vehicle with restraint parts so that the back of the seat does not fall naturally from the storage position to the rear of the vehicle, thereby holding the back of the seat in the storage position. Yes. However, in the case of using the restraint component, there is a disadvantage that it takes time and effort because the restraint component needs to be operated both when the back portion is stored and when it is pulled out.

  Therefore, an object of the present invention is to provide a stroller that can hold the back portion of the seat in the storage position without depending on the restraining parts.

The stroller (1) according to the first aspect of the present invention has a vehicle body (2) that can be deformed between an unfolded state and a folded state, and the vehicle body includes a seat portion (3a) and a back portion (3b). A back support member (64) whose one end is rotatably connected to the vehicle body at a back connection point (37, D), and a back support member (64) of the back support member. A head member (65) rotatably connected at the other end and a head connection point (66a, A), the head member being connected to the vehicle body via an interlocking member (67), and the interlocking member One end portion of the interlocking member is rotatably connected to the vehicle body at a front connection point (68, C) separated above the back portion connection point, and the other end portion of the interlocking member is separated from the head connection point. By connecting the head member rotatably at the connecting point (69, B), The vehicle body, the back support member, the head member, and the interlocking member constitute a four-bar rotation link mechanism. In the folded state, the back support member and the interlocking member are moved around the back connection point and the front connection point. , The back portion is moved between an advanced position (position in FIG. 39) tilted rearward of the vehicle body and a storage position (position Ps in FIG. 42) raised in front of the vehicle body. When the back portion is in a region closer to the storage position than the restriction position (position Px in FIG. 42) between the advanced position and the storage position, the head connection point or the stroller A connection structure (66) around the one connection point is configured so that the rotational movement around one of the rear connection points (66a, A) is restricted, Storage position side By a restoring force against the elastic deformation of the back when moving the back in the area, the storage position (Ps) is set, the restricted position said back in a position acting to hold the back in the storage position arises Rotation trajectory drawn by rotating the other connection point (69, point B) of the head connection point or the rear connection point around the back connection point and the front connection point ( Dt, Bt), and the back portion is moved until the intersection (P2) located in front of the vehicle body with respect to the other connection point at the restriction position and the other connection point (point B) coincide with each other. The storage position is set such that the back portion reaches the storage position by moving the back portion .

The stroller (1) according to the second aspect of the present invention has a vehicle body (2) that can be deformed between an unfolded state and a folded state, and the vehicle body includes a seat portion (3a) and a back portion (3b). A back support member (64) whose one end is rotatably connected to the vehicle body at a back connection point (37, D), and a back support member (64) of the back support member. A head member (65) rotatably connected at the other end and a head connection point (66a, A), the head member being connected to the vehicle body via an interlocking member (67), and the interlocking member One end portion of the interlocking member is rotatably connected to the vehicle body at a front connection point (68, C) separated above the back portion connection point, and the other end portion of the interlocking member is separated from the head connection point. By connecting the head member rotatably at the connecting point (69, B), The vehicle body, the back support member, the head member, and the interlocking member constitute a four-bar rotation link mechanism. In the folded state, the back support member and the interlocking member are moved around the back connection point and the front connection point. , The back portion is moved between an advanced position (position in FIG. 39) tilted rearward of the vehicle body and a storage position (position Ps in FIG. 42) raised in front of the vehicle body. When the back portion is in a region closer to the storage position than the restriction position (position Px in FIG. 42) between the advanced position and the storage position, the head connection point or the stroller A connection structure (66) around the one connection point is configured so that the rotational movement around one of the rear connection points (66a, A) is restricted, Storage position side The storage position (Ps) is set at a position where the action of holding the back portion in the storage position is generated by the restoring force against the elastic deformation of the back portion when the back portion is moved to the region, and the back portion is in the restriction position. Rotation trajectory drawn by rotating the other connection point (69, point B) of the head connection point or the rear connection point around the back connection point and the front connection point ( Dt, Bt) is located between the intermediate point between the intersection points (P1, P2) and the intersection point (P2) located in front of the vehicle body relative to the other connection point at the restriction position. Thus, the storage position is set so that the back portion reaches the storage position by moving the back portion, and the movement of the back portion toward the intersection point located in front of the vehicle body is regulated from the storage position. The vehicle body is provided with a stopper so as to be controlled.

According to the stroller of the present invention , when the back part reaches the restriction position, the rotational movement around the connection point that is not on the vehicle body side, that is, one connection point on the head member side is restricted. If the back component is a complete rigid body, it is necessary to allow rotational movement around all connection points in order for the four-bar rotation link mechanism to operate, and rotational movement around one connection point. In a state where is restricted, the four-bar rotation link mechanism cannot operate. Therefore, it is impossible to rotate the back support member and the interlocking member at the back from the regulation position to the storage position side. However, in actuality, elastic deformation occurs in the component parts of the back part, so that the back part can be moved to the storage position side beyond the regulation position. The amount of elastic deformation of the back part increased or decreased according to the correlation between the rotational movement of the back support member centered on the back connection point and the rotational movement of the interlocking member centered on the front connection point, and exceeded the regulation position. Initially, the amount of elastic deformation increases, but starts to decrease in the middle and then increases again. After the amount of elastic deformation starts to decrease, the amount of elastic deformation increases if the back part is returned to the advanced position, and a restoring force acts on the back part to prevent the movement to return to the advanced position. By utilizing this property, it is possible to generate an action of holding the back portion in the storage position with a restoring force against elastic deformation of the back portion. The action is obtained by an operation of moving the back part beyond the regulation position to the storage position side. Therefore, it is possible to hold the back portion of the seat at the storage position by a simple operation only by moving the back portion of the seat toward the storage position without depending on the restraining parts. Moreover, according to the first aspect, when the back portion reaches the storage position, the other connection point reaches the intersection of the two rotation trajectories, and the back portion is released from the elastically deformed state. Since the amount of elastic deformation increases regardless of which direction the back part is moved from that position, the back part is reliably held at the storage position where neither elastic deformation nor restoring force is generated. Moreover, according to the 2nd aspect, it is possible to produce the effect | action which presses a back part against a stopper with the elastic restoring force which arises in a back part, and hold | maintains a back part in a storage position.

  In one embodiment of the present invention, the inclination of the back portion can be changed in the deployed state, and the back portion is raised when the back portion is raised forward of the vehicle body beyond the movement range of the back portion in the deployed state. A connection structure around the one connection point may be configured to reach the restriction position. According to this, in the unfolded state, the back four-link rotary link mechanism can rotate without being hindered in its operation, and the inclination of the back can be changed.

  Furthermore, in one aspect of the present invention, each of the left and right side edge portions of the back portion is provided with a side member (64) extending along the side edge portion as the back support member, Left and right side members are connected to each other, and the interlocking member is provided to connect the head member and the vehicle body on the left and right sides of the back portion, thereby rotating the four-node rotation to each side edge of the back portion. A link mechanism may be configured. According to this, the rotational movement of the four-joint rotary link mechanism on both sides of the back portion is restricted at the restriction position, and the action of holding the back portion at the storage position is generated on both sides of the back portion, so that the back portion is more securely held at the storage position. be able to.

  In one embodiment of the present invention, while the back portion moves between the advanced position and the storage position, there is a gap amount required to prevent the user from pinching around each connection point. A gap (S8, S9, S15, S16) having a size larger than the required gap amount defined as the minimum value may be secured. According to this, a user's finger pinching in the vicinity of each connection point at the time of storing a back part can be prevented.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, according to the present invention, while the back portion of the seat moves from the restriction position toward the storage position, the rotation operation at one of the connection points on the head member side is restricted and elastic deformation occurs in the back portion. The back part of the seat is moved toward the storage position without depending on the restraint parts. It is possible to hold it in the storage position with a simple operation.

1 is a perspective view of a stroller according to an embodiment of the present invention. The right view of the stroller of FIG. The perspective view which shows the vehicle body structure of the stroller of FIG. The right view of the vehicle body structure of FIG. The figure which shows the folding state of the stroller of FIG. The perspective view which shows the state which looked at the upper part of the hand pushing frame from diagonally backward of the vehicle body. The top view centering on the grip saddle. The perspective view which shows the state which looked at the lower part of the vehicle body from diagonally backward. The figure which shows the relationship between the cross-sectional shape of a front leg and a rear leg, and the direction of a vehicle body. The figure which expands and shows the state which looked at the connection part of the component of a vehicle body from the side of the vehicle body. The perspective view which shows the state which looked at the connection part of FIG. 10 from diagonally backward of the vehicle body. The side view which shows the state which raised the back part frame of the sheet | seat. The perspective view which shows the state which looked at the state which raised the back part frame of the seat from diagonally backward of the vehicle body. Sectional drawing along the lower pin of an opening-and-closing lock mechanism. The perspective view which shows the state which looked at the opening-and-closing lock mechanism from diagonally backward of the vehicle body. The perspective view which shows the state which looked at the locking member and lock receiving part of the opening-and-closing locking mechanism from the inner side of the vehicle body. The figure which shows the state which looked at the seat part of the sheet | seat from the front side. The figure which shows the state which looked at the sheet | seat from diagonally backward of the vehicle body. The figure which shows the state which looked at the structure of the rear wheel and the circumference | surroundings from diagonally backward of the vehicle body. The figure which shows the state which looked at the rear wheel and the surrounding structure from the arrow XX direction of FIG. The figure which showed the support structure of the rear wheel along the axle. The figure which shows the principal part of a rear-wheel locking mechanism. The figure which shows the relationship between the stopper pin of a rear-wheel locking mechanism, and the projection part on the rear-wheel side. The perspective view of the surface side of a wheel cap. The perspective view of the back surface side of a wheel cap. The perspective view of a step and its vicinity. The figure which shows the structure of the back surface side of a step. The enlarged view of food | hood and its circumference | surroundings. The enlarged view of the attaching part with respect to the hand frame of a hood. The figure which shows the connection belt for suspending a basket to a vehicle body. The figure which shows the state which attached the connection belt to the front part connection pin. The figure which expands and shows the state which looked at the armrest and its surrounding structure in the folding state from the left-right direction outer side of the stroller. FIG. 33 is a front view around the armrest from the direction of arrow XXXIII in FIG. 32. FIG. 33 is a sectional view taken along line XXXIV-XXXIV in FIG. 32. The figure which shows the state which looked at the armrest in the folding state and the surrounding structure from the back side of FIG. The perspective view which shows the state which looked at the part shown in FIG. 35 from diagonally forward of the stroller. The figure which shows the state which looked around the lower pin from the arrow XXXVII direction of FIG. The perspective view which shows the state which looked around the lower pin from the inner side of the stroller. The figure which shows the state which protruded the back part flame | frame back in the folding state. The figure which shows the state in the middle of accommodating a back part frame in the handlebar side in a folding state. The figure which shows the state which accommodated the back part frame in the handlebar side in the folding state. The figure which showed typically operation | movement of the back part frame in the folding state.

  Hereinafter, a stroller according to an embodiment of the present invention will be described. First, the overall configuration of the stroller will be described with reference to FIGS. The stroller 1 includes a vehicle body 2, a seat 3 supported by the vehicle body 2, a hood 4 disposed above the seat 3, and a basket 5 disposed below the seat 3. However, in FIGS. 3 to 5, illustration of a part or all of the hood 4 is omitted, and only the frame portion of the seat 3 is shown. 4 and 5, the illustration of the basket 5 is also omitted. The stroller 1 can be deformed between a developed state (expanded state) as shown in FIGS. 1 to 5 and a folded state (folded state) as shown in FIG. Below, the structure of the stroller 1 is demonstrated centering on an expansion | deployment state.

  As apparent from FIGS. 3 and 4, the vehicle body 2 includes a frame portion 10, and a front wheel portion 11 and a rear wheel portion 12 that support the frame portion 10 in a movable manner. The frame portion 10 is a portion constituting the frame structure of the vehicle body 2, and includes a pair of front legs 14, a pair of rear legs 15, and a pair of rear legs 1 disposed on both sides in the left-right direction (width direction) of the stroller 1 (vehicle body 2). An armrest (intermediate interlocking member) 16, a single push frame 17 arranged to connect the left and right armrests 16, a step 18 as a front cross member that interconnects the lower portions of the left and right front legs 14, And a rear cross member 19 for connecting the lower portions of the rear legs 15 to each other.

  The front wheel portion 11 is provided at the lower end of the front leg 14, and the rear wheel portion 12 is provided at the lower end of the rear leg 15. Each front wheel portion 11 is disposed so as to sandwich the front wheel holding member 20 attached to the lower end of the front leg 14, the horizontal axle 21 supported by the front wheel holding member 20, and the front wheel holding member 20. And a pair of front wheels 22 rotatably attached to both ends. The front wheel holding member 20 includes a fixed portion 20a fixed to the front leg 14, and a turning portion 20b rotatable about the turning axis VA (see FIG. 4) in a substantially vertical direction with respect to the fixed portion 20a. Yes. The axle 21 is attached to the turning part 20b. Thereby, the front wheels 22 and their axles 21 can turn about the turning axis VA. The axle 21 is offset with respect to the turning axis VA. When the stroller 1 is moved forward, the axle 21 is held behind the turning axis VA by a moment around the turning axis VA applied to the front wheel 22. This state is defined as the forward position of the front wheel 22. The front wheel holding member 20 is provided with a turning lock mechanism (not shown) for restraining the turning portion 20b from turning in a state where the front wheel 22 is in the forward position by operating the lock lever 23 (see FIG. 8). ing. The turning lock mechanism may be the same as that of a known baby stroller, and the details are omitted. On the other hand, the rear wheel portion 12 includes a rear wheel holding member 24 attached to the lower end of the rear leg 15, an axle 25 supported by the rear wheel holding member 24 in a state in which the vehicle body 2 is directed in the left-right direction, and the axle 25 And a single rear wheel 26 that is rotatably supported by the motor. Turning around the vertical axis of the rear wheel 26 is impossible. That is, the axle 25 of the rear wheel 26 is always directed in the left-right direction of the vehicle body 2. The rear wheel 25 and the surrounding structure will be described in detail later.

  On one side in the left-right direction of the vehicle body 2, the upper ends of the front legs 14 and the rear legs 15 and the leg mounting portions 16 a at the lower ends of the armrests 16 are connected to each other via a fulcrum pin 29. The same applies to the other side of the vehicle body 2. The joint position (rivet 28) of the front leg 14 with respect to the leg mounting portion 16a is somewhat offset in the front-rear direction of the vehicle body 2 with respect to the fulcrum pin 29. The armrest 16 is a resin molded product, and includes a top plate 16c that is directed upward so that an infant can place a hand or arm on it. The armrest 16 is provided with a specific shape for preventing finger pinching during folding, which will be described later.

  The hand push frame 17 includes a pair of left and right handle rods 30 and a grip rod 31 extended to connect the upper portions of the handle rods 30. Each handle bar 30 has a shape that can be divided into two parts, an upper barb part 30b and a lower barb part 30c, with a bent part 30a in the middle as a boundary. However, the upper collar part 30b and the lower collar part 30c are integrally formed by bending a single metal pipe material. As is clear from FIG. 4, the lower collar part 30c is bent so as to be biased toward the rear of the vehicle body 2 with respect to the extension line EL of the upper collar part 30b. An upper bracket 32 is attached to the lower collar 30c through a rivet 33 so as not to move. A handle connecting portion 16 b at the upper end of the armrest 16 is attached to the upper bracket 32 via an upper pin 34. Thereby, the armrest 16 and the handle bar 30 of the hand push frame 17 are rotatable with respect to each other about the upper pin 34. Further, at the lower end of the lower collar portion 30c, the rear end portion of the front interlocking rod (front interlocking member) 35 and the front end portion of the rear interlocking rod (rear interlocking member) 36 are freely rotatable via the lower pin 37. It is connected. The structure of these connecting portions will be described in detail later. The front end of the front interlocking rod 35 is rotatably connected to the front leg 14 via the front connection pin 38. A rear end portion of the rear interlocking rod 36 is rotatably connected to the rear leg 15 via a rear connection pin 39. The interlocking rods 35 and 36 and the connecting pins 38 and 39 are all made of metal. Further, a lower bracket 40 is fixed to the rear leg 15. When the stroller 1 is in the unfolded state, the lower end of the handle bar 30 contacts the lower bracket 40 and is received in the vertical direction by the rear leg 15. Around the lower pin 37, an opening / closing lock mechanism 41 for restraining the stroller 1 in the expanded state and the folded state is provided. Details of the opening / closing lock mechanism 41 will be described later. The lower bracket 40 may be formed integrally with the rear leg 15.

  The front leg 14, the rear leg 15, the armrest 16, the handle bar 30, the front interlocking bar 35 and the rear interlocking bar 36 form link mechanisms on the left and right of the frame part 10 of the vehicle body 2. The configuration of the left and right link mechanisms is the same. By releasing the restraint of the vehicle body 2 by the open / close lock mechanism 41 and rotating the components of the link mechanism around the respective connection points, the stroller 1 is moved between the unfolded state of FIG. 1 and the folded state of FIG. Can be deformed. With reference to FIG. 4, the deformation from the expanded state to the folded state will be described as follows. When the stroller 1 is deformed from the unfolded state to the folded state, the front leg 14 is rotated counterclockwise with respect to the armrest 16 around the fulcrum pin 29, and the rear leg 15 is moved relative to the armrest 16 around the fulcrum pin 29. The armrest 16 is rotated clockwise around the upper pin 34 with respect to the lower collar portion 30c. Accordingly, the front interlocking rod 35 and the rear interlocking rod 36 rotate around the lower pin 37 with respect to the lower flange portion 30 c, and the front interlocking rod 35 moves the front connecting pin 38 to the front leg 14. The rear interlocking rod 36 rotates about the rear connecting pin 39 with respect to the rear leg 15. Thereby, the frame part 10 of the vehicle body 2 is folded as shown in FIG. In the folded state, the front wheel 22 and the rear wheel 26 are arranged at some distance in the front-rear direction. At this time, the center of gravity of the stroller 1 is located between the front wheel 22 and the rear wheel 26 with respect to the longitudinal direction of the vehicle body 2. Thereby, the stroller 1 can be made independent by the front wheel 22 and the rear wheel 26 in the folded state. Since the position of the rivet 28 for joining the front leg 14 is biased forward from the fulcrum pin 29, a gap is generated between the front leg 14 and the rear leg 15 in the folded state. This eliminates the possibility of inconvenience such as pinching of fingers. This point will be described in more detail later.

  When the stroller 1 in the unfolded state is viewed from the left-right direction of the vehicle body 2, the upper collar part 30 b of the hand push frame 17, the armrest 16 and the front leg 14 are arranged linearly. As one criterion for determining whether or not it is straight, if the extension line EL of the upper collar 30b extends so as to penetrate at least a part of the armrest 16 and at least a part of the front leg 14, it is determined that the straight line is straight. be able to. In addition, when the front wheel 22 is in the forward movement position (solid line position in FIG. 4), the upper collar portion 30b is provided so that the extension line EL intersects the virtual horizontal plane HP including the axle 21 at the axle 21 or in front thereof. Is desirable. More desirably, the upper collar portion 30b is provided so that the extension line EL intersects the virtual horizontal plane HP on or in front of the turning axis VA. Since the upper bracket 32 is attached to the lower collar portion 30c, the position of the upper pin 34 can be brought closer to the extension line EL.

  When the mutual relationship among the upper collar portion 30b, the armrest 16, the front leg 14, and the front wheel 22 is set as described above, the following advantages are obtained. When considering how to apply force in the lower part of the stroller 1, that is, in the vicinity of the ground contact surface where the front wheel 22 and the rear wheel 26 are located, the force by which the user pushes the vehicle body 2 via the handle bar 30 is the turning axis VA of the front wheel 22. Acts in the vicinity or in the front area. Accordingly, the front wheel 22 turns around the turning axis VA so as to be pulled from the front. Therefore, the wobbling of the front wheel 22 around the turning axis VA is suppressed, and the direction of the front wheel 22 is stabilized during both straight traveling and turning. Thereby, the operational feeling of the stroller 1 can be improved. On the other hand, in the conventional stroller in which the extension line of the handle bar is set so as to pass between the front wheel and the rear wheel or in the vicinity of the rear wheel, the front wheel is pushed from the rear. The front wheels are likely to stagger around the wheel, and the stability of the direction of the front wheels 22 may be impaired, and the user's feeling of operation may deteriorate.

  As shown in more detail in FIGS. 6 and 7, the grip rod 31 of the hand push frame 17 is connected to the left and right handle rods 30 and toward the front and upper side of the vehicle body 2 with respect to the connection portions 42. The grip portion 43 is bent so as to extend obliquely, and the connecting portion 44 is located between the grip portions 43. The connecting portion 42 and the grip portion 43 are integrally formed by bending a metal pipe material. The connecting portion 42 and the handle bar 30 are connected to each other via a connector 45. As a result, even if the cross-sectional shapes of the handle rod 30 and the grip rod 31 are different, the shapes of the handle fitting portion 45a and the grip fitting portion 45b on the connector 45 side are the cross-sections of the handle rod 30 and the grip rod 31, respectively. By adapting to the shape, the handle rod 30 and the grip rod 31 can be reliably joined.

  Each connector 45 has a built-in angle adjustment mechanism. The angle adjusting mechanism switches the grip fitting portion 45b of the connector 45 between a state in which the grip fitting portion 45b is rotatable with respect to the handle fitting portion 45a and a state in which the grip fitting portion 45b is not rotatable. It is provided to make it possible to change the inclination. When the push buttons 45c (see FIG. 6) of the left and right connectors 45 are pushed in at the same time, the restraint between the fitting portions 45a and 45b of the connector 45 is released, and the inclination of the grip rod 31 with respect to the handle rod 30 can be changed. It becomes. When the push button 45c is released, the relative rotation between the fitting portions 45a and 45b of the connector 45 becomes impossible. Hereinafter, the state in which the connecting portion 42 is substantially in line with the upper flange portion 30b of the handle rod 30, that is, the state in which the connecting portion 42 is on the extension line EL of the upper flange portion 30b is referred to as the reference position of the grip rod 31. Since the grip portion 43 is extended obliquely as described above, when the grip rod 31 is in the reference position, the vehicle body 2 moves from the outer side (side connected to the handle rod 30) toward the inner side. Gradually deviate forward. Therefore, it is easy for the user to put a hand on the grip portion 43, and the operability of the stroller 1 is improved. Operation with one hand is also easy. When the grip rod 31 is tilted backward from the reference position, the grip portion 43 gradually protrudes upward from the outside toward the inside. Also in this case, the user can easily touch the hand, and the operability of the stroller 1 is improved.

  The connecting portion 44 is made of resin and is generally formed in a hollow cylindrical shape. The connecting portion 44 is integrated with the grip portion 43 by fitting both ends thereof with the grip portion 43. The communication part 44 is provided with an opening / closing operation part 47 for operating the opening / closing lock mechanism 41 of the vehicle body 2. The opening / closing operation unit 47 includes an operation lever 48 provided on the outer periphery of the communication unit 44, and a connecting wire (not shown) housed in the grip rod 31 so as to be interlocked with the operation lever 48. ing. The connecting wire extends beyond the grip rod 31 to the vicinity of the lower end of the handle rod 30. The operation lever 48 is attached to the connecting portion 44 so as to be slidable in the left-right direction. When the operation lever 48 is on the right side of FIG. 6, the restraining function of the opening / closing lock mechanism 41 is activated, and the stroller 1 is restrained in the expanded state or the folded state. When the operation lever 48 is operated to the left, the restriction by the opening / closing lock mechanism 41 is released. As can be seen from FIG. 5, when the stroller 1 is folded with the grip rod 31 in the reference position, the grip portion 43 and the connecting portion 44 of the grip rod 31 are approximately the front wheel 22 and the rear in the longitudinal direction of the vehicle body 2. Located between the rings 26. Such an arrangement is advantageous for setting the position of the center of gravity of the stroller 1 in the folded state between the front wheel 22 and the rear wheel 26.

  FIG. 8 is a view showing a state in which the front legs 14 and the rear legs 15 are viewed obliquely from the rear, and FIG. 9 is a view showing the relationship between the cross-sectional shapes of the front legs 14 and the rear legs 15 and the direction of the vehicle body 2. The front legs 14 and the rear legs 15 are formed by processing a metal pipe material, like the handle bar 30 of the hand push frame 17. As is clear from FIG. 9, the front leg 14 has a deformed hexagonal cross section, and the rear leg 15 has a substantially rectangular cross section. In FIG. 9, the front of the vehicle body 2 is indicated by an arrow F, the rear is indicated by an arrow B, the left is indicated by an arrow L, and the right is indicated by an arrow R. Although the front leg 14 and the rear leg 15 have different cross-sectional shapes, the cross-sectional dimensions are common in that they have a long side direction with a wide width and a short side direction with a narrow width. On the other hand, the relationship between the direction of the vehicle body 2 and the long side direction and short side direction of the cross section differs between the front leg 14 and the rear leg 15. The front legs 14 are arranged such that the long side direction corresponds to the left-right direction of the vehicle body 2 and the short side direction corresponds to the front-rear direction of the vehicle body 2. On the other hand, the rear legs 15 are arranged such that the long side direction corresponds to the front-rear direction of the vehicle body 2 and the short side direction corresponds to the left-right direction of the vehicle body 2. The reason is as follows.

  The rear leg 15 is located below the hand push frame 17, and the hand push frame 17 is connected to the rear leg 15 via the rear interlocking rod 36 and the lower end thereof is supported by the lower bracket 40 on the rear leg 15. Therefore, when the user applies a downward load to the hand frame 17, the load is input to the rear leg 15 larger than the front leg 14, and a relatively large bending moment along the vertical plane acts on the rear leg 15. Therefore, the rear leg 15 is arranged so that its long side direction is along the front-rear direction of the vehicle body 2, thereby ensuring a large section modulus and a moment of inertia in the load direction to improve bending strength and rigidity. ing. On the other hand, since the load applied to the front leg 14 is relatively small, the long side direction is arranged along the left-right direction of the vehicle body 2. Thereby, a large projected area of the front leg 14 when the stroller 1 is viewed from the front is secured. Therefore, the front leg 14 is easily noticeable to the user when viewed from the front, and the visual effect is enhanced. A sense of unity is produced between the top plate 16c of the armrest 16 and the front leg 14, thereby further enhancing the eye catching effect. By giving the front leg 14 a characteristic color or pattern different from other parts, or by using the front surface of the front leg 14 as a display surface for a trademark, product name, etc., the user's attention to those designs and trademarks The stroller 1 can be strongly impressed with the design and trademark of the stroller 1. In addition, the front leg 14 is given further design features by an arched arc attached to the front of the vehicle body 2. Each cross-sectional shape of the front leg 14 and the rear leg 15 is an example, and those shapes may be appropriately changed. For example, the front leg 14 and the rear leg 15 may be formed of a pipe material having an elliptical cross section. Even in this case, the front leg 14 may be arranged so that the direction in which the cross-sectional dimension is large corresponds to the left-right direction of the vehicle body 2, and the rear leg 15 may be arranged so that the direction in which the cross-sectional dimension is small corresponds to the left-right direction of the vehicle body 2.

  Next, details of the opening / closing lock mechanism 41 will be described. FIG. 10 is an enlarged view of a connecting portion of the front leg 14, the rear leg 15, the armrest 16, and the hand pushing frame 17, and FIG. 12 and 13 show a state in which the sheet 3 is raised from the states of FIGS. 10 and 11. A configuration related to the inclination adjustment of the sheet 3 will be described later. As described above, the open / close lock mechanism 41 is provided around the lower pin 37. One open / close lock mechanism 41 is provided on each of the left and right sides of the vehicle body 2, and the left and right open / close lock mechanisms 41 have the same configuration.

  FIG. 14 is a cross-sectional view taken along the lower pin 37 of the opening / closing lock mechanism 41, and FIG. 15 is a view showing a state in which the periphery of the opening / closing lock mechanism 41 is viewed obliquely from the rear of the vehicle body 2. As is apparent from these drawings, the open / close lock mechanism 41 includes a lock member 50 fitted to the outer periphery of the lower collar part 30c of the handle bar 30, a wire holder 51 disposed inside the lower collar part 30c, and a lower collar. A first holding member 52, a second holding member 53, and a third holding member 54 are provided on the inner side in the left-right direction of the vehicle body 2 (right side in FIG. 14) with respect to the portion 30 c. A long hole 30d is provided in the lower collar portion 30c along the longitudinal direction thereof. The lock member 50 and the wire holder 51 are coupled to each other so as to be able to move integrally along the longitudinal direction of the lower collar portion 30c by a connecting pin 55 extending through the long hole 30d. The first to third holding members 52, 53, 54 are combined with each other so as to be rotatable, and are connected to the lower collar portion 30 c so as to penetrate the lower pin 37. These holding members 52, 53, 54 can be individually rotated around the lower pin 37. The first holding member 52 and the third holding member 54 are provided with fitting recesses 52a and 54a coaxial with the lower pin 37, and the second holding member 53 is rotatable with these fitting recesses 52a and 54a. Fitting projections 53a and 53b to be fitted are provided. The fitting recesses 52a and 54a and the fitting projections 53a and 53b are fitted to each other, thereby suppressing backlash between the first to third holding members 52, 53 and 54, and the first to third holding members 52. , 53, 54 can be smoothly rotated around the lower pin 37.

  The rear interlocking rod 36 is fixed to the first holding member 52, and the front interlocking rod 35 is fixed to the third holding member 54. The rear interlocking rod 36 is also penetrated by the lower pin 37. Further, the frame of the seat 3 is fixed to the second holding member 53 and the third holding member 54, which will be described in detail later. A lock receiving portion 56 is formed integrally with the first holding member 52. The lock receiving portion 56 protrudes from the outer periphery of the first holding member 52, and lock receiving grooves 56a are provided at two locations on the outer periphery. The lock member 50 is provided with a lock protrusion 50a that protrudes inside the lower collar portion 30c. As shown in FIG. 16, the lock member 50 moves between a release position where the lock protrusion 50a is spaced above the lock receiving portion 56 and a lock position where the lock protrusion 50a is offset downward from the release position. When the lock member 50 moves to the lock position, the lock protrusion 50a is fitted into the lock receiving groove 56a. Thereby, the lock member 50 and the lock receiving portion 56 mesh with each other around the lower pin 37 so as not to be relatively rotatable.

  The lock member 50 is attached to the lower flange portion 30c of the handle rod 30, and the lock receiving portion 56 is provided so as to rotate integrally with the rear interlocking rod 36 around the lower pin 37. Therefore, when the lock member 50 and the lock receiving portion 56 cannot rotate with respect to each other, relative rotation between the handle rod 30 and the rear interlocking rod 36 around the lower pin 37 is also impossible. When the vehicle body 2 is deformed between the deployed state and the folded state, the rear interlocking rod 36 also rotates relative to the handle rod 30, the rear leg 15, and the like. Therefore, if the steering wheel rod 30 and the rear interlocking rod 36 cannot be rotated relative to each other, the deformation operation of the vehicle body 2 is also impossible. Thereby, the stroller 1 is restrained in the unfolded state or the folded state. As described above, the lock receiving portion 56 is provided with two lock receiving grooves 56a. In the unfolded state, the lock protrusion 50a fits into one lock receiving groove 56a, and in the folded state, the lock protrusion 50a fits into the other lock receiving groove 56a. During the deformation between the unfolded state and the folded state, the lock protrusion 50a and the lock receiving groove 56a cannot be engaged with each other.

  As described above, in the open / close lock mechanism 41, the lock projection 50a of the lock member 50 is formed in the lock receiving groove 56a located relatively close to the lower pin 37 to be the center of rotation of the handle rod 30 and the rear interlocking rod 36. By fitting, the stroller 1 is constrained to the expanded state or the folded state. Since the lock member 50 and the lock receiving portion 56 are engaged with each other in the vicinity of the rotation center, the load acting on the fitting portion between the lock protrusion 50a and the lock receiving groove 56a can be kept small. Thereby, the lock member 50 and the lock receiving portion 56 can be reduced in size and weight. Note that switching between the release position and the lock position of the lock member 50 is realized by operating an operation lever 48 (see FIGS. 6 and 7) provided in the connecting portion 44 of the grip rod 31. As already described, the operation lever 48 is coupled to the connecting wire routed in the hand push frame 17, and the tip of the connecting wire is coupled to the wire holder 51. The wire holder 51 is biased toward the lock position by a biasing member (not shown) such as a spring. When the operation lever 48 is operated to the left in FIG. 7 against the force of the urging member, the wire holder 51 is pulled up and the lock member 50 moves to the release position.

  As shown in FIG. 14, a support leg 58 and a fitting block 59 fixed to the inside of the support leg 58 are provided at the lower end of the lower collar part 30c of the handle bar 30 (FIG. 5). See also). The fitting block 59 protrudes below the handle bar 30 beyond the support leg 58. When the stroller 1 is deployed from the folded state to the unfolded state, the support leg 58 is fitted into the leg receiving part 40a of the lower bracket 40, and the fitting block 59 is fitted into the recess 40b provided in the leg receiving part 40a. Include. When the support leg 58 comes into contact with the leg receiving portion 40a of the lower bracket 40, the handle bar 30 is received by the lower bracket 40 from below. As a result, a part of the downward load acting on the handle bar 30 can be directly supported by the rear leg 15, and the burden on the components of the opening / closing lock mechanism 41 can be reduced.

  Further, when the fitting block 59 is fitted into the recess 40b, the displacement of the handle bar 30 in the left-right direction with respect to the rear leg 15 is limited. Therefore, even if the handle bar 30 and the rear leg 15 are connected via a plurality of parts such as the lower pin 37, the rear interlocking bar 36, and the rear connection pin 39, the handle bar 30 and the rear leg 15 are connected to each other. The play between them does not expand, and the play of the vehicle body 2 in the deployed state can be more reliably prevented. Thus, the fitting block 59 and the recess 40b of the lower bracket 40 function as a pair of meshing portions. However, a convex portion similar to the fitting block 59 may be disposed on the lower bracket 40, and a concave portion may be disposed at the lower end of the handle bar 30, so that these function as a pair of engaging portions. The lower bracket 40 surrounds the periphery of the support leg 58 from the front and left and right sides of the vehicle body 2 in order to prevent finger pinching and the like when the support leg 58 is fitted into the receiving portion 40a in accordance with the deformation from the folded state to the expanded state. A vertical wall 40c is provided (see also FIGS. 8 and 10).

  The materials of the lock member 50, the first to third holding members 52, 53, 54, the support leg 58, and the fitting block 59 may be set as appropriate, but the vehicle body 2 can be formed by forming these parts from resin. Can be reduced in weight. Since each of the metal handle rod 30 and the metal rear interlocking rod 36 is fitted with the same metal lower pin 37, the load transmission path from the handle rod 30 to the rear interlocking rod 36 is entirely made of metal. Consists of parts. Further, since the rear interlocking rod 36 is coupled to the rear leg 15 via the metal rear connecting pin 39, the same applies to the rear interlocking rod 36 and the rear leg 15. Therefore, even if the component parts such as the first to third holding members 52, 53, 54 of the opening / closing lock mechanism 41 are made of resin, load transmission from the handle bar 30 to the rear leg 15 via the rear interlocking bar 36 is achieved. By configuring the path with metal parts, the strength and rigidity of the vehicle body 2 can be maintained high.

  Next, the configuration of the sheet 3 will be described. The seat 3 has a basic configuration in which the sheet material 61 shown in FIGS. 1 and 2 is bonded to the seat frame 60 shown in FIGS. 3 and 4. As is clear from FIGS. 10 and 11, the seat frame 60 includes a seat frame 62 and a back frame 63. The seat frame 62 is a portion to be a skeleton of the seat portion of the seat 3, and the back frame 63 is a portion to be a skeleton of the seat 3. The seat frame 62 has a configuration in which a single pipe material is bent to integrally form a pair of left and right side pipes 62a and a front pipe 62b that connects the front ends of the side pipes 62a. The front pipe 62b is extended in the left-right direction of the vehicle body 2 while being bent downward with respect to the side pipe 62a. The rear end of each side pipe 62a is fixed to the third holding member 54 of the open / close lock mechanism 41 (see FIG. 15). Thereby, the seat frame 62 is integrated with the front interlocking rod 35 and rotates between the expanded state and the folded state around the lower pin 37.

  On the other hand, the back frame 63 includes a pair of left and right side pipes (side members as back support members) 64 and a head pipe (head member) 65 extending in the left and right direction of the vehicle body 2 so as to connect the side pipes 64. Have. The side pipe 64 is fixed to the second holding member 53 of the open / close lock mechanism 41 (see FIG. 15). Therefore, the side pipe 64 is connected to the handle bar 30 so as to be rotatable about the lower pin 37. The head pipe 65 is connected to the side pipe 64 through a joint 66. The joint 66 has a pair of connecting portions 66b and 66c that are combined so as to be rotatable about the connecting pin 66a. A side pipe 64 is fixed to the lower connection portion 66b, and a head pipe 65 is fixed to the upper connection portion 66c. Thereby, the head pipe 65 can change an angle (inclination) with respect to the side pipe 64 around the connecting pin 66a. Further, the upper connecting portion 66 c is connected to the upper bracket 32 via an interlocking rod (interlocking member) 67. The front end portion of the interlocking rod 67 is rotatably connected to the upper bracket 32 via the front pin 68, and the rear end portion of the interlocking rod 67 is rotatably connected to the upper connection portion 66c via the rear pin 69. . The lower connection portion 66 b of the joint 66 functions as a part of the side pipe 64, and the upper connection portion 66 c functions as a part of the head pipe 65. Thereby, the handle rod 30, the side pipe 64, the head pipe 65, and the interlocking rod 67 constitute a four-bar rotation link mechanism.

  As shown in FIGS. 10 and 11, when the side pipe 64 of the back frame 63 is tilted backward with the lower pin 37 as the center, the head pipe 65 is caused to be raised with respect to the side pipe 64 by the interlocking rod 67. And rotate around the connecting pin 66a. On the other hand, as shown in FIGS. 12 and 13, when the side pipe 64 of the back frame 63 is raised toward the handle bar 30 with the lower pin 37 as the center, the head pipe 65 is pushed by the interlocking bar 67 and the connecting pin 66a. Is rotated clockwise in FIG. As a result, the connecting portions 66b and 66c of the joint 66 are aligned, and the head pipe 65 changes its inclination so that the tip portion of the head pipe 65 warps backward with respect to the extension line of the side pipe 64. The clockwise rotational movement of the upper connecting portion 66c with respect to the lower connecting portion 66b of the joint 66 is restricted at a position slightly shifted clockwise from the position of FIG. 12, and further to the clockwise direction beyond the position. Rotation is impossible. Such restriction of rotational movement can be realized by providing a stopper or the like for limiting the rotation range between the lower connecting portion 66b and the upper connecting portion 66c, for example.

  The sheet material 61 is joined to the pipes 62 a, 62 b, 64, 65 of the seat frame 60 with appropriate tension. 17 and 18 show a state in which the sheet material 61 is attached. As the sheet material 61, for example, a mesh fabric having a large number of ventilation holes is used. As apparent from FIGS. 13 and 15, the third holding member 54 of the left and right opening / closing lock mechanism 41 is integrally formed with a pipe holding portion 54 b, and the pipe holding portion 54 b extends in the left-right direction of the vehicle body 2. An end of a sheet support pipe (sheet support member) 70 is attached. The seat support pipe 70 rotates around the lower pin 37 integrally with the side pipe 64 of the back frame 63. The pipe holding portion 54b contacts the rear interlocking rod 37 from the inner side in the left-right direction. Thereby, the left-right direction rigidity of the vehicle body 2 can be improved.

  As is clear from FIG. 18, the connecting belt 71 is attached so as to form a loop on the back surface side of the sheet material 61 and in the vicinity of the boundary between the seat frame 62 and the back frame 63. By passing the seat support pipe 70 through the connection belt 71, the connection belt 71 is hooked to the seat support pipe 70 in a state where an appropriate tension is applied. Thus, the sheet material 61 is clearly divided into regions corresponding to the seat portion 3a and the back portion 3b (FIG. 17) with the attachment position of the connection belt 71 as a boundary. Note that a seat belt 72 for restraining the infant is also attached to the seat material 61.

  According to the seat 3 described above, the seat 3 itself can be completed in advance as a sub-assembly component by attaching the seat material 61 to the seat frame 60 and attaching the attached components such as the seat belt 72. In the seat 3 assembled as a subassembly component, the side pipe 62a of the seat frame 62 is used as the third holding member 54 of the open / close lock mechanism 41, and the side pipe 64 of the back frame 63 is used as the second holding member 53 of the open / close lock mechanism 41. To the vehicle body 2 by connecting the joint 66 and the upper bracket 32 via an interlocking rod 67. As described above, the assembly work of the seat 3 and the work of attaching the seat 3 to the vehicle body 2 can be clearly distinguished, so that the efficiency of the seat-related assembly work can be increased.

  The back portion 3b of the seat 3 is connected to the handle bar 30 to ensure the stability of the back portion 3b and to allow the inclination of the back portion 3b to be adjusted. An inclination adjusting belt 73 is provided as means for adjusting the inclination (see FIG. 2). The tilt adjustment belt 73 is disposed so as to go around the outside of the back portion 3 b of the seat 3 in the left-right direction of the vehicle body 2, and both ends thereof are fixed to the handle bar 30 of the hand push frame 17. The inclination adjustment belt 73 can be adjusted in length using an adjustment string 73a. If the inclination adjustment belt 73 is extended, the back part 3b falls, and if the inclination adjustment belt 73 is contracted, the back part 3b rises. Thereby, the reclining function of the seat 3 is realized. However, the means for adjusting the inclination of the back frame 63 is not limited to the inclination adjustment belt 73 and can be appropriately modified. For example, a belt or other connecting member whose length can be individually adjusted may be provided between both sides of the back frame 63 and the left and right handle rods 30.

  Next, the rear wheel 26 and the surrounding structure will be described in detail. As shown in FIGS. 19 and 20, the rear wheel holding member 24 is integrally formed with a rear leg mounting portion 80 and an axle support portion 81. The rear leg mounting portion 80 is provided with a fitting recess 80a, and the lower end of the rear leg 15 is fitted into the fitting recess 80a, whereby the rear leg 15 and the rear wheel holding member 24 are integrally coupled. . The rear cross member 19 is also fixed to the rear leg mounting portion 80. As shown in FIG. 21, the axle 25 of the rear wheel portion 12 is attached to the axle support portion 81. The rear wheel 26 includes a resin wheel body 82 and an elastic material tire 83 fitted to the outer periphery of the wheel body 82. The wheel body 82 includes a hub 82a, spokes 82b, and a rim 82c. The number of spokes 82b is set to three for the purpose of weight reduction (see FIG. 1). A plurality of ribs 82d are provided on the rim 82c for the purpose of reinforcement. Each front wheel 22 has a configuration in which a wheel body and tires are combined in the same manner as the rear wheel 26, and the number of spokes of the wheel body is three.

  The hub 82a is fitted to the axle 25 via a collar 84 as a bearing member. The collar 84 and the hub 82a are fitted together so as to be integrally rotatable, and the collar 84 is rotatable relative to the axle 25. Therefore, even when the axle 25 is made of metal and the wheel main body 82 is made of resin, slip occurs between the collar 84 and the axle 25, and wear does not occur between the hub 82a and the collar 84 or occurs. Even so, the progress is extremely slow. When the collar 84 is worn or deformed and there is a non-negligible play between the axle 25 and the collar 84, the collar 84 can be replaced to prevent the rear wheel 26 from rattling or expanding. . The axle 25 is attached to the axle support portion 81 such that a flange portion 25a at one end thereof is positioned outside the rear wheel 26. The other end side of the axle 25 protrudes inside the axle support portion 81 and is prevented from being detached by a fixing member 85 such as a retaining ring. A washer 86 is provided between the flange portion 25 a of the axle 25 and the collar 84. By the washer 86, the inclination of the rear wheel 26 with respect to the axle 25 is suppressed. A washer 87 is also provided between the fixing member 85 and the axle support portion 81. The washer 87 prevents the end face of the wheel support portion 81 facing the fixing member 85 from being worn, thereby suppressing rattling in the axial direction of the axle 25. Thereby, the stability of the axle 25 is improved, and the tilt prevention effect of the rear wheel 26 with respect to the wheel 25 is further enhanced. However, the washer 87 may be omitted when there is a situation where an equivalent effect can be expected by the fixing member 85. Further, the rear wheel 26 is attached to the axle 25 in a region above the axle 25 so that the end surface 82e inside the hub 82a is in contact with the restraining surface 81a of the axle support portion 81. Therefore, even in a configuration in which only one rear wheel 26 is provided on one rear wheel portion 12, the upper portion of the rear wheel 26 falls inward in the axial direction, that is, in the direction indicated by the arrow A in FIG. The inclination of the rear wheel 26 can be suppressed.

  As shown in FIGS. 19 and 20, a rear wheel locking mechanism 90 is further provided between the rear wheel 26 and the rear wheel holding member 24 to restrain the rear wheel 26 so as not to rotate. The rear wheel lock mechanism 90 is provided on the inner side of an operation pedal (lock operation member) 92 that is rotatably attached to the rear wheel holding member 24 around a pin 91 as a turning shaft, and a hub 82a of the rear wheel 26. And a plurality of protrusions 93. The protrusion 93 is integrally formed with the wheel body 82 and constitutes a part of the hub 82a. The above-described end surface 82e of the hub 82a is configured by the end surfaces of the protrusions 93. As shown in FIG. 22, the plurality of protrusions 93 are provided around the axle 25 at a constant pitch. FIG. 22 shows a state in which the relationship between the operation pedal 92 and the protrusion 93 is viewed from a direction parallel to the axle 25, and the right side of the figure corresponds to the rear of the vehicle body 2.

  Each protrusion 93 has a base portion 93a extending in the radial direction of the hub 82a and an enlarged portion 93b arranged on the outer peripheral side of the base portion 93a. On the other hand, the operation pedal 92 is provided with a cylindrical stopper pin (stopper portion) 92a. A pair of operation portions 92b and 92c are provided on the surface of the operation pedal 92. When the user selectively operates the operation portions 92b and 92c, the operation pedal 92 is like a seesaw centering on the pin 91. Rocks. When the operation portion 92b on the left side of FIG. 22 is depressed, the operation pedal 92 rotates counterclockwise around the pin 91 and moves to the unlocking position indicated by the solid line, and the stopper pin 92a moves away from the protrusion 93. . When the right operation portion 92c is stepped on, the operation pedal 92 rotates clockwise around the pin 91 and moves to the lock position, whereby the stopper pin 92a fits into the pin receiving groove 94 in the gap between the projections 93. Include. In this case, no matter whether the rear wheel 26 rotates in the forward direction or the backward direction, the projection 93 and the stopper pin 92 mesh with each other in the circumferential direction of the axle 25, the hub 82a is restrained in the circumferential direction, and the rear wheel 26 is It becomes impossible to rotate. Since the enlarged portion 93b is provided on the outer peripheral side of the protruding portion 93, it is possible to suppress the stopper pin 92a from coming off due to the torque acting on the rear wheel 26. The effect of preventing the stopper pin 92a from coming off can be surely exhibited by setting the following relationship between the stopper pin 92a and the protrusion 93.

  As shown in FIG. 23, the arc drawn by the center position SC of the stopper pin 92a around the axle 25 is used as the rotation locus C1 of the projection 93, and the center position SC of the stopper pin 92a is around the pin 91 as the turning axis. The drawn arc is defined as a rotation locus C2 of the stopper pin 92a. When the tangent lines α and β are drawn from the intersection point P of the rotation trajectories C1 and C2 with respect to the rotation trajectories C1 and C2, the stopper pin 92a is set so that the crossing angle θ between the tangent lines α and β is approximately 90 °. And the protrusion 93 are set. As a result, when the stopper pin 92a is fitted in the pin receiving groove 94, the torque between the projection 93 and the stopper pin 92a can be applied regardless of the forward or backward torque applied to the rear wheel 26. In the meantime, a pressing force acts along the tangent line α, and a component force in a direction of pushing the stopper pin 92a from the pin receiving groove 94 does not act, or even if it acts. Therefore, the restraining effect of the rear wheel 26 by the rear wheel locking mechanism 90 can be surely exhibited. The crossing angle θ may be set to some allowable range with respect to 90 ° as long as there is no sufficient force to push the stopper pin 92a out of the pin receiving groove 94. “Approximately 90 °” means that such a range is included.

  The enlarged portion 93b provided on the protrusion 93 of the hub 82a has a tapered taper on the outer peripheral side. By providing such a taper, the stopper pin 92 a can easily enter the pin receiving groove 94. In addition, a hole 92d is formed between the operation portions 92b and 92c of the operation pedal 92. The rear wheel holding member 24 has a lock mark that appears in the hole 92d when the operation pedal 92 is in the lock position, and a lock release mark that appears in the hole 92d when the operation pedal 92 is in the lock release position. At least one of these is provided. By checking the sign, the user can determine whether the rear wheel 26 is in a locked state or a rotatable state.

  24 and 25 show the wheel cap 100. The wheel cap 100 is a resin part that is arbitrarily attached to the outside of the front wheel 22 (but only on the outer front wheel) and the rear wheel 26 for the purpose of decoration. 4 and 19 show a state in which the wheel cap 100 is attached. The wheel cap 100 for the front wheel and the wheel cap 100 for the rear wheel are the same except for the size. Therefore, the configuration will be described below by taking the wheel cap 100 of the rear wheel 26 as an example. The wheel cap 100 has a disk-like appearance, and a through hole 101 is formed at the center thereof. On the back surface side (the side shown in FIG. 25) of the wheel cap 100, ribs 102 fitted together along the inner circumference of the rim 82c of the rear wheel 26, and a plurality of claw portions 103 further projecting from the ribs 102, Is provided. The wheel cap 100 is attached to the rear wheel 26 by hooking the claw portion 103 inside the rim 82c. When the wheel cap 100 is attached to the rear wheel 26, the claw portion 103 is hidden behind the wheel cap 100 and is not visible to the user. Accordingly, when the surface of the wheel cap 100 is subjected to a surface treatment for improving functionality, for example, a plating treatment for improving appearance or a coding treatment for improving wear resistance, It can be excluded from the scope of processing. Accordingly, it is possible to prevent inconveniences associated with the surface treatment, for example, occurrence of meshing failure due to dimensional change, embrittlement, or increase in risk of breakage due to a decrease in elasticity. When the surface treatment is performed by immersion in a treatment liquid such as a plating liquid, it is not necessary to immerse the claw portion 103 in the treatment liquid. Therefore, it is not necessary to mask the nail part 103, and the number of work steps can be reduced.

  FIG. 26 shows step 18. The step 18 is provided as a place where an infant sitting on the seat 3 places his / her feet, and also functions as a member for connecting the left and right front legs 14 to reinforce the vehicle body 2 in the left / right direction. Step 18 is a resin molded product. At both ends of the step 18, leg fitting holes 18a through which the front legs 14 are passed are provided. A step surface 18b for placing a foot is formed between the leg fitting holes 18a. The step surface 18b is configured as a stepped surface in which the rear portion 18d is lowered by one step with respect to the front portion 18c. By using such a stepped surface, the apparent width of the step 18 in the front-rear direction of the vehicle body 2 can be reduced. FIG. 27 shows the configuration of the back side of Step 18. In order to give necessary strength to Step 18, ribs 18e are formed vertically and horizontally on the back side of Step 18 as necessary. The rib 18e may not be provided uniformly. The ribs 18e may be provided only in places where strength or rigidity needs to be increased.

  FIG. 28 is an enlarged view of the hood 4 and its surroundings, and FIG. 29 is an enlarged view of a portion where the hood 4 is attached to the hand frame 17. The hood 4 includes a hood support mechanism 110 and a hood main body 111. As is clear from FIG. 29, the hood support mechanism 110 has a pair of hood brackets (only one side is shown in FIG. 29) 112 attached to the left and right handle rods 30 of the hand push frame 17 and the hood brackets 112. A pair of hood bases 113 that are detachably attached and a single hood stay 114 provided between the hood bases 113 (see also FIG. 4). The hood base 113 includes a mount portion 113a attached to the hood bracket 112 and a turning portion 113c attached to the mount portion 113a so as to be rotatable around a pin 113b. The mount portion 113a can be detached from the hood bracket 112 by pushing the operation lever 113d.

  Both the mount part 113a and the turning part 113c are made of resin. Between the mount part 113a and the turning part 113c, there is position holding means (not shown) for selectively holding the turning part 113c at any one of a plurality of stop positions within the rotation range by using the elasticity of the resin. Is provided. For example, the position holding means alternately forms uneven portions around the axis of the swivel portion 113c, that is, the pin 113b, between the facing surfaces of the mount portion 113a and the swivel portion 113c. When the swivel portion 113c is stopped by fitting into the concave portion on the other facing surface and the stop position is changed, if the convex portions on both facing surfaces are elastically deformed, the swiveling portion 113c can be freely moved. Rotation is limited, and the uneven portions can function as position holding means. A stay fitting portion 113e is formed integrally with the turning portion 113c. The hood stay 114 is a resin strip-like part, and its both ends are fixed to the stay fitting portions 113e of the left and right hood bases 113, and is bent between the hood bases 113 so as to draw an arch upward. Supported by the state. The hood stay 114 is selectively placed at any one of a plurality of stop positions including a deployment position when the hood 4 is deployed and a storage position when the hood 4 is folded by a position holding mechanism built in the hood base 113. Retained.

  The hood main body 111 includes a screen 115 formed by cutting a hood dough into an appropriate shape, and a plurality of (three are shown in the figure) attached to appropriate positions on the inner surface side of the screen 115. And a resin hood rib 116. Stretch material is used for food fabric. The front end portion of the screen 115 is coupled to the food stay 114 so that the food stay 114 is wound inside. When the screen 115 of the hood 4 is unfolded as shown in FIG. 28, each hood rib 116 is positioned and fixed to the screen 115 so that an appropriate interval is provided in the front-rear direction of the vehicle body 2. Both ends of the hood rib 116 are gathered near the hood base 113, but are not fixed to the hood base 113.

  On both sides of the screen 115, winding portions 117 that can be wound around the handle bar 30 of the hand push frame 17 are provided. The joining position of the winding portion 117 to the screen 115 is aligned with the position of the third hood rib 116 counted from the front end of the screen 115. The left and right winding parts 117 are wound around the handle bar 30, and the third food rib 116 is attached to the handle bar 30 by fastening the winding part 117 and the screen 115 together using a pair of upper and lower snap buttons 118. Both sides of the screen 115 can be connected to the handle bar 30 while being held along. Furthermore, a loop portion 115a that can be hooked on the outer periphery of the mount portion 113a (or the turning portion 113c) of the hood base 113 is provided on both sides of the screen 115 and at a portion where the end portions of the hood rib 116 gather. By hooking the loop portion 115a to the mount portion 113a, both ends of each hood rib 116 are generally held near the mount portion 113a.

  Further, an extended portion 115 b is provided on the rear end side of the screen 115 toward the rear of the vehicle body 2. The extended portion 115b is sewn in a bag shape, and its rear end portion can be put on the back side of the back portion 3b when the back portion 3b of the seat 3 is in a tilted state (see also FIG. 6). Thereby, even if the back portion of the seat 3 is tilted, the area above the seat 3 can be covered with the screen 115. It should be noted that a joint part such as a snap button for coupling the extension part 115b and the back part 3b of the seat 3 to each other is provided so that the seat 3 and the screen 115 can be joined to each other using the joint part. Good.

  The hood 4 as described above can be switched between the folded state and the unfolded state of the screen 115 by rotating the hood stay 114 of the hood support mechanism 110 around the pin 113b of the hood base 113. In the unfolded state of the screen 115, the hood stay 114 is held by a position holding means provided in the hood base 113 at a position protruding substantially horizontally in front of the handle bar 30, and the screen 115 is stretched in the front-rear direction. A proper tension acts on the screen 115. Further, the third hood rib 116 is held along the handle bar 30 by the winding portion 117, and the loop portion 115a is hooked on the hood base 113, so that both end portions of each hood rib 116 are substantially hood base. It is held near 113. Therefore, it is not necessary to add a configuration for attaching the hood ribs 116 to the hood base 113 and holding them in place. Further, the screen 115 can be utilized by utilizing the stretchability of the screen 115 without providing separate parts such as a frame or a spring in the front-rear direction that keeps the distance between the hood stay 114 and the hood rib 116 or the distance between the hood ribs 116 constant. Can be held in a substantially constant unfolded shape. Thereby, the number of parts of the hood 4 can be reduced.

  Returning to FIGS. 1 to 5, the basket 5 is formed by sewing cloths such as mesh fabrics into a box shape. The basket 5 is suspended from the vehicle body 2 using connection belts 120 arranged at the four corners of the upper edge portion. As shown in FIG. 8, the front side of the basket 5 is suspended from the front connection pin 38 that connects the front interlocking rod 35 and the front leg 14 by using the connection belt 120. The rear side of the basket 5 is suspended from a rear connection pin 39 that connects the rear interlocking rod 36 and the rear leg 15 by using a connection belt 120. 30 and 31 show details of the connecting belt 120. FIG. The connecting belt 120 is fixed to the upper edge of the basket 5 by sewing the base 120 a on one end side to the basket 5. A stopper portion 120b that protrudes from the front and back of the connection belt 120 is formed at the front end portion of the connection belt 120 by causing the connection belt 120 to meander and stitch together. A hook 121 is fixed via a loop belt 122 to a joint portion of the base 120 a of the connection belt 120. The loop belt 122 is stitched together with the base 120a of the connecting belt 120 to the basket 5 at a predetermined joining point SP. A slit 121 a through which the connecting belt 120 can pass is formed at the tip of the hook 121.

  Therefore, if the connecting belt 120 is wound around each of the front connecting pin 38 and the rear connecting pin 39 and turned back, and the portion closer to the base 120a than the stopper 120b is inserted into the hook 121 from the slit 121a, the stopper 120b is The hook 121 is caught and the connecting belt 120 is prevented from coming off the hook 121. Accordingly, the basket 5 can be suspended from the front connection pin 38 and the rear connection pin 39 via the connection belt 120. Since the stopper portion 120b is formed by overlapping and joining the connecting belt 120 itself, the parts necessary for attaching the basket 5 are compared with the case where another part is attached to the connecting belt 120 to function as a stopper. Can be reduced.

  Next, the armrest 16 and the configuration for preventing finger pinching around the armrest 16 will be described in detail. 32 is an enlarged side view showing the armrest 16 and its surrounding configuration in a folded state, FIG. 33 is a front view from the direction of arrow XXXIII in FIG. 32, and FIG. 34 is along the line XXXIV-XXXIV in FIG. FIG. As is clear from FIG. 32, in the folded state of the stroller 1, the handle connecting portion 16b is inclined obliquely so that the handle connecting portion 16b is positioned below the leg mounting portion 16a, contrary to the unfolded state. In that case, the front leg 14 and the rear leg 15 approach each other around the leg attachment portion 16a, and the armrest 16 covers the rear leg 15. Therefore, if the user carelessly puts his / her finger around the fulcrum pin 29 during deformation from the expanded state to the folded state, there is a possibility that finger pinching will occur. Therefore, as described above, the front leg 14 is connected to the rear leg 15 by being offset forward from the fulcrum pin 29, so that a clearance S1 is secured between the front leg 14 and the rear leg 15 in the folded state. Yes. The size of the gap S1 is set to be equal to or larger than the minimum value of the gap amount necessary for preventing finger pinching (hereinafter referred to as the required gap amount). The required gap amount may be set in consideration of a certain safety value with respect to the assumed range of the thickness of the user's finger. If the required gap amount is determined by safety standards for baby strollers and other standards, the value may be used as the required gap amount. For example, whether or not a gap larger than the required gap amount is ensured is determined by assuming an arc with the required gap amount as a diameter, and if there is a gap including the arc in the folded state, the gap amount is larger than the required gap amount. It can be determined that a gap of a size is secured. In FIG. 32, the approximate position of the gap S1 is indicated by a circle with a virtual line. Hereinafter, other gaps are also indicated by similar circles in each drawing. However, the circles in the figure merely indicate the positions of the gaps, and do not illustrate the gap range or the gap amount.

  As apparent from FIGS. 33 and 34, the armrest 16 includes the above-described top plate 16c and a pair of side plates 16d that extend along both side edges of the top plate 16c and are directed in the left-right direction of the vehicle body 2. 16e. The inner region of the armrest 16 surrounded by the top plate 16c and the side plates 16d and 16e is a cavity, and the cavity opens toward the lower surface side of the armrest 16, in other words, the side facing the rear leg 15. Thereby, the rear leg 15 can enter the inside of the armrest 16 in a folded state. In order to prevent finger pinching between the armrest 16 and the rear leg 15, the side plates 16d and 16e of the armrest 16 are provided asymmetrically with respect to the center line CL1 in the width direction of the rear leg 15. First, the side plate 16d on the outer side in the left-right direction of the stroller 1 is provided so as to bulge outwardly from the rear leg 15, and the distance from the center line CL1 to the side plate 16d is larger than the distance from the center line CL1 to the side plate 16e. Thereby, in a state in which a part of the rear leg 15 enters the inside of the armrest 16, a gap S2 having a size larger than the required gap amount is secured between the rear leg 15 and the side plate 16d. Therefore, even when the user puts a finger on the inner surface side of the side plate 16d of the armrest 16 when the stroller 1 is folded, the finger is not likely to be sandwiched between the rear leg 15 and the side plate 16d.

  On the other hand, the inner side plate 16e is closer to the center line CL1 than the side plate 16d. The reason is that the side plate 16e is on the inside, and it is difficult to assume that the user may put a finger on the inner surface of the side plate 16e during the folding operation, and that the side plate 16e on the inner side of the armrest 16 is excessively stretched on the seat 3. This is because the space on the seat 3 is narrowed in the left-right direction and the comfort of the infant may be impaired. However, the lower bracket 40 on the rear leg 15 approaches the armrest 16 in the folded state, and in particular, the leg receiving portion 40a (see FIG. 8) moves to the extent that it enters the inside of the armrest 16 beyond the side plates 16d and 16e. Therefore, as shown in FIG. 34, a gap S3 having a size larger than the required gap amount is secured between the top plate 16c and the leg receiving portion 40a. Furthermore, as shown in FIGS. 35 and 36, the side plate 16e is formed with a recess 16f so as to align with the lower block 40 in the folded state. Thereby, the gap S3 communicates with the outside of the armrest 16, more specifically with the outside of the side plate 16e, via the recess 16f. The recess 16f is not limited to the position of the leg receiving portion 40a, and may be provided at an appropriate position on the side plate 16e as necessary.

  As shown in FIG. 35, the upper pin 34 that connects the handle connecting portion 16b of the armrest 16 and the upper bracket 32 on the handle rod 30 is offset forward from the lower flange portion 30c of the handle rod 30. Therefore, in the folded state, a clearance S4 having a size larger than the required clearance amount is secured between the top plate 16c of the armrest 16 and the lower flange 30c of the handle rod 30.

  In addition to the above-described gaps S1 to S4, the stroller 1 is provided with gaps S5 to S14 that are larger than the required gap amount in order to prevent pinching of the fingers. Hereinafter, it demonstrates in order. As shown in FIG. 35, a gap S <b> 5 is provided between the hood base 113 of the hood support mechanism 110 and the top plate 16 c of the armrest 16. As shown in FIG. 33, in the seat frame 60, the interlocking rod 67 of the back frame 63 is bent in two steps in the left-right direction between the two end portions, whereby the end portion on the front pin 68 side and the side pipe A gap S6 is secured between the hood base 113 and the hood base 113 and the hood stay 114, respectively. Further, both ends of the interlocking rod 67 are also bent in the front-rear direction with respect to the intermediate portion, thereby ensuring a clearance S8 around the front pin 68 and a clearance S9 around the rear pin 69, respectively. .

  FIG. 37 is a view showing a state in which the periphery of the lower pin 37 is viewed from the direction of arrow XXXVII in FIG. 5, and FIG. 38 is a view showing a state in which the periphery of the lower pin 37 is viewed from the inside of the stroller 1. As shown in these figures, gaps larger than the required gap amount are secured at several positions around the lower pin 37. As described above, the first, second, and third holding members 52, 53, 54 are sequentially attached along the axial direction of the lower pin 37 on the inner side in the left-right direction of the handle bar 30, and are attached to the first holding member 52. The rear interlocking rod 36 is fixed, the second holding member 53 is fixed with the side pipe 64 of the back frame 63, and the third holding member 54 is fixed with the side pipe 62 a of the seat frame 62. With respect to the left and right direction of the stroller 1 (the axial direction of the lower pin 37), the handle bar 30 and the rear leg 15 are in the same position, and the rear link bar 37 extends straight from the first holding member 52 to the rear leg 15. It is connected via a rear connection pin 39. Accordingly, a gap S10 is provided between the rear leg 15 and the rear interlocking rod 37. In order to maintain the clearance S10, a spacer 39a is fitted on the outer periphery of the rear connecting pin 39. Also, clearances S11 and S12 are secured between the rear interlocking rod 36 and the second holding member 53 and the side pipe 64 according to the axial thicknesses of the first holding member 52 and the second holding member 53. .

  The side pipe 62 a of the seat frame 62 connected to the third holding member 53 is bent so as to swell outward in the left-right direction from the connecting portion with the third holding part 54 in order to secure the width of the seat 3. However, the bending amount is limited so that a gap S13 is generated between the side pipe 62a and the handle bar 30. Further, as apparent from FIG. 38, a gap S14 is also secured between the connecting portion of the side pipe 64 to the second holding member 53 and the connecting portion of the side pipe 62a to the third holding member 54.

  Next, storage of the back portion 3b (see FIG. 1) when the stroller 1 is in a folded state will be described. As is clear from FIG. 5, when the stroller 1 is in the folded state, the back frame 63 of the seat frame 60 (in other words, the back portion 3b of the seat 3) is moved to the stowed position raised on the handle bar 30 side of the vehicle body 2. It is possible to move. 39 to 41 show how the back frame 63 is housed on the side of the handle bar 30 when the stroller 1 is in the folded state. However, FIG. 39 shows a state where the back frame 63 is in the advanced position where it is tilted backward. As described above, the side pipe 64 of the back frame 63 is rotatably connected to the handle bar 30 around the lower pin 37, and the interlocking bar 67 is rotatable about the front pin 68 relative to the handle bar 30. It is connected to. Therefore, when the back frame 63 (back portion 3b) is moved to the storage position, the back frame 63 may naturally fall to the advanced position unless the rotation of the back frame 63 is restricted by any means. Hereinafter, a configuration for holding the back frame 63 in the storage position will be described with reference to FIG.

FIG. 42 is a diagram schematically showing the back frame 63 as a four-joint rotation link mechanism, where point A is a connecting pin 66a, point B is a rear pin 69, point C is a front pin 68, and point D is shown. Are points representing the lower pins 37, where point D corresponds to the back connection point, point A corresponds to the head connection point, point C corresponds to the front connection point, and point B corresponds to the rear connection point. First, considering securing the CD that is mounted on the same handle rod 30, point A draw a rotational trajectories around the point D, point B depicts the rotation locus Bt about the point C. Point B rotates relatively around point A. However, the relative rotational movement of point B with respect to point A is limited. That is, when the back frame 63 is moved from the advanced position of FIG. 39 to the storage position Ps, the head pipe 65 is inclined slightly rearward from the position where the connecting portion of the side pipe 64 and the head pipe 65 is in a straight line. Until the back frame 63 reaches the restriction position Px, rotational movement around the point B is allowed, but when the back frame 63 moves beyond the restriction position Px to the region on the storage position Ps side, the connection of the joint 66 is performed. Due to the limitation of the rotational movement between the portions 66b and 66c, the point B cannot rotate relative to the point A as a center. In FIG. 42, when the point B reaches the position P1, the back frame 63 becomes the restriction position Px. The position of the point B at this time is referred to as a regulation start point P1. At the restriction start point P1, the point B is defined as an intersection point on two different trajectories of the rotation trajectory Bt centered on the point C and the rotation trajectory Dt centered on the point D. Therefore, if the back frame 63 is a complete rigid body, the point B cannot move beyond the regulation start point P1 toward the storage position Ps. However, since the back frame 63 is not a completely rigid body, the point B can move beyond the regulation start point P1 by elastically deforming the interlocking rod 67, for example. Its elastic deformation amount increases as the locus Bt, is D t apart.

Further, as apparent from FIG. 42, the rotation trajectories B t and Dt intersect at the inflection point P2 in addition to the regulation start point P1, and the position where the inflection point P2 and the point B coincide is the storage position of the back frame 63. Ps. When the point B is at the inflection point P2, the back frame 63 is released from the elastically deformed state in the same manner as at the restriction start point P1. Left further 42 the point B exceeds the inflection point P2 (i.e., the direction of a deeper housing the back frame 63) when moved to the rotation locus Bt, since D t leaves again, is elastically deformed back frame 63 Arise. That is, the back frame 63 is elastically deformed regardless of the direction in which the point B moves with respect to the inflection point P2, and the restoring force against the elastic deformation acts in a direction to return the point B to the inflection point P2. . Thus, the position of the back frame 63 when the point B coincides with the inflection point P2 is set as the storage position Ps. That is, when the back frame 63 is moved to the storage position Ps, the point B coincides with the inflection point P2 and an action of holding the back frame 63 at the storage position Ps occurs. However, when the point B is between the inflection point P2 and the regulating starting point P1, the trajectory Bt, as is clear from the difference between D t, the peak amount of elastic deformation of the back frame 63 at an intermediate position of point P1, P2 When the point B moves to the inflection point P2 side beyond the intermediate position, the amount of elastic deformation gradually decreases. Since the restoring force accompanying the elastic deformation acts in a direction to reduce the amount of elastic deformation, if the point B moves to the point P2 side beyond the intermediate position between the points P1 and P2, this is stored in the back frame 63. A force to move toward Ps is added. Therefore, if a stopper for restricting the movement toward the storage position Ps of the back frame 63 is added to the vehicle body 2 at an arbitrary position where the point B is between the intermediate position between the points P1 and P2 and the inflection point P2, the back portion The frame 63 is pressed against the stopper by an elastic restoring force generated inside. Even if the position is set as the storage position Ps, it is possible to cause an action of holding the back frame 63 at the storage position Ps by a restoring force against elastic deformation.

  The above-described restriction position Px of the back frame 63 is set outside the range in which the inclination of the back frame 63 in the unfolded state of the vehicle body 2 can be adjusted (the movement range of the back portion 3b). That is, as long as the inclination of the back portion 3b is adjusted in the unfolded state, the rotation between the connecting portions 66b and 66c of the joint 66 is not restricted, and the back frame 63 is moved from the advanced position in FIG. The connection structure of the connection portions 66b and 66c with the connection pin 66a as the center is configured so that the back frame 63 reaches the restriction position when it is raised somewhat forward. As shown in FIGS. 39 to 41, regarding the back frame 63, in addition to the gaps S8 and S9 described above, a joint having a size larger than the required gap amount for preventing finger pinching is used as a joint. A clearance S15 around the connection pin 66a of 66 and a clearance S16 around the lower pin 37 are provided.

  The present invention is not limited to the above-described embodiment and its modifications, and may be implemented in various forms. For example, in the above embodiment, the rotational movement about the pin 66a of the joint 66, in other words, the head connection point A is limited in the region from the restricting position to the storage position side, but instead, the rear pin 69, that is, the rear connection The rotational movement around point B may be limited. In this case, the storage position may be set in the same manner as in FIG. 42 with respect to the rotation trajectory drawn by the pin 66a around the lower pin 37 and the front pin 68, respectively. The back support member of the back portion is not limited to the pipe-shaped side member, and may be in a plate shape or other appropriate form. A single back support member may be rotatably connected to vehicle body components such as left and right handlebars at a back connection point. In the above embodiment, the back portion is provided so that the four-node rotation link mechanism is configured at each of the left and right side edges of the back portion, but the four-node rotation link mechanism is configured only at one of the side edges. Also good. Even in the case where the four-bar rotation link mechanism is provided on both sides, the rotational movement around one connection point on the head member side may be restricted only on one side. However, when the rotational movement is restricted on both sides, it is preferable that the action of holding the back portion in the storage position is caused equally on both sides of the back portion, and thereby the holding effect of the back portion can be more reliably exhibited. A vehicle body is not restricted to the example by the frame structure mentioned above. As long as the back portion of the seat is mounted on the vehicle body so as to form a four-bar rotation link mechanism, the configuration for enabling the vehicle body to be folded can be variously modified, and the structure is not necessarily limited to the frame structure. . The present invention is applicable not only to a four-wheel baby stroller but also to a three-wheel baby stroller with a single front wheel.

1, 1A Stroller 2 Car body 3 Seat 3a Seat 3b Back 4 Hood 5 Basket 10 Frame 11 Front wheel 12 Rear wheel 14 Front leg 15 Rear leg 16 Armrest (intermediate interlocking member)
16c Top plate 16d Outer side plate 16e Inner side plate 17 Hand push frame 18 Step 18b Step surface 18e Rib 19 Rear cross member 21 Axle 22 Front wheel 23 Lock lever 24 Rear wheel holding member (wheel holding member)
25 rear wheel 25 axle 26 rear wheel 29 fulcrum pin 30 handle rod 30a bent part 30b upper collar part 30c lower collar part 31 grip collar 32 upper bracket 34 upper pin 35 front interlocking collar (front interlocking member)
36 Rear interlocking rod (rear interlocking member)
37 Lower pin (back connection point)
38 front connection pin 39 rear connection pin 40 lower bracket 40a leg receiving portion 40b recess 40c vertical wall portion 41 opening / closing lock mechanism 42 connection portion 43 grip portion 44 connection portion 45 connector 48 operation lever 50 lock member 50a lock projection 52 first holding Member 53 Second holding member 54 Third holding member 55 Connecting pin 56 Lock receiving portion 56a Lock receiving groove 58 Support leg 59 Fitting block 60 Seat frame 61 Seat material 62 Seat frame 62a Side pipe 62b Front pipe 63 Back portion frame 64 Side pipe (Back support member, side member)
65 Head pipe (head member)
66 Joint 66a Connecting pin (head connecting point)
67 Interlocking rod (interlocking member)
68 Front pin (front connection point)
69 Rear pin (rear connection point)
70 Sheet support pipe (sheet support member)
71 connecting belt 80 rear leg mounting portion 81 axle support portion 81a restraining surface 82 wheel body 82a hub 82b spoke 82c rim 82e hub end surface 84 collar (bearing member)
85 Fixing member 86 Washer 90 Rear wheel lock mechanism 91 Pin (swivel axis)
92 Operation pedal (lock operation member)
92a Stopper pin (stopper part)
93 Projection portion 93a Base portion 93b Enlarged portion 94 Pin receiving groove 100 Wheel cap 103 Claw portion 110 Hood support mechanism 111 Hood body 112 Hood bracket 113 Hood base 113a Mount portion 113c Turning portion 114 Hood stay 115 Screen 115a Loop portion 116 Hood rib 117 Winding Part 118 Snap button 120 Connection belt 120a Base part 120b Stopper part 121 Hook 121a Slit 122 Loop belt C1 Rotation locus of the protrusion C2 Rotation locus of the stopper pin EL Extension line of the upper collar portion of the handle bar HP Virtual horizontal plane including the axle of the front wheel S1 ~ S16 Clearance larger than the required clearance SP Connection point of connecting belt VA Front wheel turning axis α, β tangent of rotation locus θ intersection angle of tangent

Claims (5)

The vehicle body has a vehicle body that can be deformed between an unfolded state and a folded state. A back support member that is freely connected, and a head member that is rotatably connected to the other end of the back support member at a head connection point, the head member being connected to the vehicle body via an interlocking member. The one end portion of the interlocking member is rotatably connected to the vehicle body at a front connection point that is separated from the back connection point, and the other end portion of the interlocking member is separated from the head connection point. The vehicle body, the back support member, the head member, and the interlocking member constitute a four-bar rotation link mechanism by being rotatably connected to the head member at a point, and in the folded state, the back support member And the interlocking member on the back By rotating around the tie point and the front connection point, the back part can be moved between an advanced position that is tilted to the rear of the vehicle body and a storage position that is raised to the front of the vehicle body. In a stroller
When the back portion is in a region closer to the storage position than the restriction position between the advance position and the storage position, a rotational movement around the connection point of either the head connection point or the rear connection point occurs. A connection structure around the one connection point is configured to be regulated,
The storage position is set at a position where an action of holding the back portion in the storage position is generated by a restoring force against elastic deformation of the back portion when the back portion is moved to the storage position side region beyond the regulation position. It is,
Rotation trajectories drawn by rotating the other connection point of the head connection point or the rear connection point when the back portion is in the restriction position around the back connection point and the front connection point, respectively. The back part is moved to the storage position by moving the back part until the other connection point coincides with the intersection point located in front of the vehicle body with respect to the other connection point in the restriction position. A stroller in which the storage position is set to reach. The vehicle body has a vehicle body that can be deformed between an unfolded state and a folded state, and the vehicle body is provided with a seat having a seat portion and a back portion, and one end of the back portion rotates at a connection point between the vehicle body and the back portion. A back support member that is freely connected, and a head member that is rotatably connected to the other end of the back support member at a head connection point, the head member being connected to the vehicle body via an interlocking member. The one end portion of the interlocking member is rotatably connected to the vehicle body at a front connection point that is separated from the back connection point, and the other end portion of the interlocking member is separated from the head connection point. The vehicle body, the back support member, the head member, and the interlocking member constitute a four-bar rotation link mechanism by being rotatably connected to the head member at a point, and in the folded state, the back support member And the interlocking member on the back By rotating around the tie point and the front connection point, the back part can be moved between an advanced position that is tilted to the rear of the vehicle body and a storage position that is raised to the front of the vehicle body. In a stroller
  When the back portion is in a region closer to the storage position than the restriction position between the advance position and the storage position, a rotational movement around the connection point of either the head connection point or the rear connection point occurs. A connection structure around the one connection point is configured to be regulated,
  The storage position is set at a position where an action of holding the back portion in the storage position is generated by a restoring force against elastic deformation of the back portion when the back portion is moved to the storage position side region beyond the regulation position. And
Rotation trajectories drawn by rotating the other connection point of the head connection point or the rear connection point when the back portion is in the restriction position around the back connection point and the front connection point, respectively. The back portion is moved by moving the back portion so that the other connection point is located between an intermediate position between the intersection points and an intersection point located in front of the vehicle body with respect to the other connection point at the restriction position. The storage position is set to reach the storage position;
A stroller in which a stopper is provided on the vehicle body so that the operation toward the intersection side located in front of the vehicle body with respect to the storage position of the back portion is restricted.   The inclination of the back portion can be changed in the deployed state, and the one of the back portions reaches a regulation position when the back portion is raised in front of the vehicle body beyond the range of movement of the back portion in the deployed state. The stroller according to claim 1, wherein a connection structure around the connection point is configured.   Each of the left and right side edge portions of the back portion is provided with a side member extending along the side edge portion as the back support member, and the head member is provided so as to connect the left and right side members, The said interlocking member is provided so that the said head member and the said vehicle body may be connected with the right and left of the said back part, and the said four-bars rotation link mechanism is comprised by each side edge part of the said back part by Claims 1-3. The stroller according to any one of the above.   While the back part moves between the advance position and the storage position, a required gap defined as the minimum value of the gap amount required to prevent the user from pinching around each connection point The stroller according to any one of claims 1 to 4, wherein a gap larger than the amount is secured.

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