JP6334953B2 - Back-to-back baby carriage - Google Patents

Description

  The present invention relates to a back-to-face switching baby carriage that can switch a push rod between a back-pressing position and a facing-pressing position.

  The back-to-face switching baby carriage can be switched between the back push position behind the infant seat and the face push position in front of the infant seat so that the baby seated on the infant seat can move in the direction of the baby carriage. Visibility can be obtained, or the baby carriage operator can face the infant sitting on the infant seat while pushing the baby carriage forward. Because of this convenience, many back-to-face switched baby carriages are commercially available.

  As a frame structure of a general back-to-face switching baby carriage, for example, those described in JP 2012-136222 A (Patent Document 1) and JP 2000-159121 A (Patent Document 2) are known. The back-to-face switching baby carriage described in these patent documents includes a pair of front legs, a pair of rear legs, and a pair of push rods (also referred to as hand push rods) spaced apart in the vehicle width direction. Each push bar is disposed on the outer side in the vehicle width direction than the front legs and the rear legs. The lower end of each push bar is supported by a bracket attached to the outer side of each rear leg in the vehicle width direction. Each push bar swings in the front-rear direction around the lower end.

  In particular, the baby carriage described in Patent Document 1 includes a lock release mechanism for releasing the deployed state of the baby carriage when the baby carriage is folded. The lock release mechanism is provided across the push bar and the handrail support member (also referred to as a pipe) that supports the rear end portion of the handrail member (also referred to as the armrest).

  The baby carriage described in Patent Document 2 includes a handrail support member (also referred to as a handrail support bar) that supports a rear end portion of a handrail member (also referred to as a handrail frame).

JP 2012-136222 A JP 2000-159121 A

  However, the present inventor has found that there is a point to be further improved in the conventional baby carriage. In the baby carriage disclosed in Patent Document 1, it is necessary to provide a back frame that supports the back of the infant seat separately from the frame structure. The back frame is not provided on the pair of handrail support members so as not to hinder the operation of the unlocking mechanism. For example, the back frame extends in the front-rear direction and supports the seat portion of the infant seat (connection bar). It is also provided on a pair of rear legs and extends upward. The handrail support member of Patent Literature 1 supports only the rear end of the handrail, and does not support the backrest of the infant seat. Since the baby carriage described in Patent Document 1 includes a backrest frame in addition to the handrail support member, there are many parts, and there is room for improvement in the number of parts.

  In the baby carriage described in Patent Document 2, a backrest frame (also referred to as a backrest member) is provided at the rear end of the handrail member and extends upward. In this case as well, both the backrest frame and the handrail support member are required, and there is room for improvement in the number of parts.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a back-to-face switching baby carriage that can support the backrest of an infant seat with a simple structure while reducing the number of parts compared to the conventional art. .

For this purpose, the back-to-face switched baby carriage according to the present invention has a pair of front legs having a front wheel at the lower end and spaced apart in the vehicle width direction, and a rear wheel at the lower end and spaced in the vehicle width direction. A pair of rear legs, at least one vehicle width direction member extending in the vehicle width direction and connecting the pair of front legs and / or the pair of rear legs to each other, and the vertical direction of the rear legs A pair of rear leg brackets respectively provided in the central region, and a pair of lower end portions attached to the rear leg brackets via swinging shafts so as to be swingable between a rear back pushing position and a front facing pushing position. and push rod are connected through a pair of handrail members each extending rearward from the upper end of the rear leg is disposed in the vehicle width direction inside than the push rod, a shaft to the rear leg or the rear leg bracket lower end, the vertical direction A central region is connected to the rear end of the handrail member via a shaft; End regions obtain Bei a backrest support rod and a pair of upwardly extending beyond the handrail member.

  According to the present invention, since the rear end portion of the handrail member is connected to the center region in the vertical direction of the backrest support rod, the rear end portion of the handrail member is supported without the handrail support member as in the prior art. be able to. Further, the back support bar is firmly fixed by the handrail member so as not to move in the front-rear direction, and can support the back of the infant sitting on the infant seat. Note that the lower end of the back support bar is supported by the rear leg or the rear leg bracket means that the lower end of the back support bar may be directly attached to the rear leg or the lower end of the back support bar is the rear leg. It may be indirectly attached to the rear leg via the bracket, or the lower end portion of the back support bar may be indirectly attached to the rear leg via another member.

  The backrest support bar may be arranged on the inner side in the vehicle width direction than the push bar. As one embodiment of the present invention, the backrest support bar is disposed on the inner side in the vehicle width direction than the handrail member. As another embodiment, the backrest support bar is disposed on the outer side in the vehicle width direction than the handrail member. Or as other embodiment, it arrange | positions so that the vehicle width direction position of the backrest support bar and the vehicle width direction position of a handrail member may overlap.

  As a preferred embodiment of the present invention, the upper ends of the back support bars are connected to each other. According to such an embodiment, the back of the infant can be supported by the entire pair of back support bars, and the load on the back of the infant does not act unevenly on only one back support bar. The connection between the upper ends of the pair of backrest support bars may be a single member in which the pair of backrest support bars are integrally formed, or the upper end of one backrest support bar and the other backrest support. The upper end of the rod may be joined by insertion fixing or the like, or a rod extending in the vehicle width direction may be provided between the upper end of one back support rod and the upper end of the other back support rod. It may be erected. As another embodiment, one back support bar in the vehicle width direction and the other back support bar in the vehicle width direction are separated from each other.

  As a further preferred embodiment of the present invention, the position in the vehicle width direction of the lower end portion of the push bar overlaps with the position in the vehicle width direction of the center region in the vertical direction of the rear leg. According to such an embodiment, since the position in the vehicle width direction of the lower end portion of the push rod, which is a connection portion between the push rod and the rear leg, overlaps the position in the vehicle width direction of the center region in the vertical direction of the rear leg, the operator of the baby carriage pushes the push rod. The force for pushing and pulling is directly input to the rear leg without passing through a member extending in the vehicle width direction, for example, a swing shaft of the push rod. Therefore, the backlash of the frame structure can be reduced as compared with the prior arts of Patent Document 1 and Patent Document 2.

  Further, as compared with the baby carriages of Patent Literature 1 and Patent Literature 2, the vehicle width direction dimension of the body frame of the baby carriage surrounding the infant seat can be reduced by the overlapping width of the push rod and the rear leg. Thereby, the vehicle width direction dimension of the infant seat can be expanded without changing the vehicle width direction dimension of the entire baby carriage. It should be noted that the position in the vehicle width direction of the lower end portion of the push bar overlaps with the position in the vehicle width direction of the center region in the vertical direction of the rear leg as long as at least a part of it overlaps. The direction center region may be aligned in the vehicle width direction. Further, the interval between the lower ends of the pair of push rods and the interval between the vertical center regions of the pair of rear legs may be substantially equal. Also, the distance between the cores at the lower end of one push rod to the core at the lower end of the other push rod, and from the core in the vertical central region of one rear leg to the core in the vertical central region of the other rear leg. The distance between the cores may be substantially equal. The front leg and the rear leg may be directly connected by a common rotating shaft, or may be indirectly connected by interposing another frame member. As another embodiment, the lower end portion of the push rod may be disposed on the outer side in the vehicle width direction than the center region in the vertical direction of the rear leg.

  Thus, according to the present invention, the conventional handrail support member can be omitted, and the number of parts can be reduced. In addition, the backrest of the infant seat can be reliably supported with a simple structure.

1 is a perspective view showing a back-to-face switching baby carriage according to an embodiment of the present invention. It is a side view which shows the same embodiment. It is a top view which shows the same embodiment. It is a front view which shows the same embodiment. It is a rear view which shows the same embodiment. It is explanatory drawing which expands and shows the connection part of a push rod and a rear leg. It is a perspective view which shows the same embodiment. It is a side view which shows the same embodiment. It is a top view which shows the same embodiment. It is a front view which shows the same embodiment. It is a rear view which shows the same embodiment. It is explanatory drawing which expands and shows the connection part of a push rod and a rear leg.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a back-to-face switching baby carriage according to an embodiment of the present invention. FIG. 2 is a side view showing the embodiment. FIG. 3 is a plan view showing the embodiment. FIG. 4 is a front view showing the embodiment. FIG. 5 is a rear view showing the embodiment. FIG. 6 is an explanatory diagram showing an enlarged connection portion between the push rod and the rear leg. 1 to 6 show a state where the push bar is in the back pushing position. In order to facilitate understanding of the invention, the body frame of the back-to-face switching baby carriage is mainly shown in the drawings, and infant seats, hoods and the like are omitted.

  The back-to-face switching baby carriage according to the present embodiment includes a pair of front legs 11, a pair of rear legs 13, a pair of push bars 17, a pair of seat support bars 19 and at least one vehicle width direction as body frames. A member is provided. These frame members are provided on the left and right sides in the vehicle width direction to form a pair. Moreover, the vehicle width direction member should just extend in the vehicle width direction and couple | bond the left and right frame members which make a pair, and a number and arrangement | positioning location are not specifically limited. In this embodiment, as a vehicle width direction member, a front leg coupling member 21 that couples a pair of front legs 11, a rear leg coupling member 23 that couples a pair of rear legs 13, and a handle that couples a pair of push rods 17. 27, and a seat coupling member 29 that couples the pair of seat support bars 19 to each other. Since the vehicle body frame of the present embodiment is configured symmetrically, only one frame member in the vehicle width direction will be mainly described, and description of the other frame member in the vehicle width direction will be omitted.

  A front wheel 12 is provided at the lower end of each front leg 11 extending in the vertical direction. A rear wheel 14 is provided at the lower end of each rear leg 13 that extends in the vertical direction behind the front legs 11. Both ends of the front leg coupling member 21 extending in the vehicle width direction are coupled to the lower ends of the front legs 11. Both ends of the rear leg coupling member 23 extending in the vehicle width direction are also coupled to the lower ends of the rear legs 13. In order to pivotally attach the front wheel 12 to the lower end portion of the front leg 11 and to connect the lower end portion of the front leg 11 and the end portion of the front leg coupling member 21, the lower end portion of the front leg 11 is thicker than the central region in the vertical direction of the front leg 11. It is formed. The same applies to the lower end of the rear leg 13.

  The upper end of the front leg 11 and the upper end of the rear leg 13 are rotatably connected to the front end of the handrail member 15 via a rotation shaft extending in the vehicle width direction. A pair of handrail members 15 attached to the body frame are disposed on both sides of the infant seat, and partition the infant seat space from the outside seat space in the vehicle width direction with respect to the infant seat space. As shown in FIG. 1, the upper end of the front leg 11 is disposed adjacent to the outer side in the vehicle width direction of the front end of the handrail member 15, and the upper end of the rear leg 13 is disposed adjacent to the outer side of the upper end of the front leg 11 in the vehicle width direction. The However, the vehicle width direction outer side surface of the upper end of the front leg 11 is notched so as to receive the upper end of the rear leg 13, and the thickness in the vehicle width direction of the upper end of the front leg 11 is formed to be approximately half that of other parts of the front leg 11. Further, the inner side surface in the vehicle width direction at the upper end of the rear leg 13 is cut out so as to receive the upper end of the front leg 11, and the thickness in the vehicle width direction at the upper end of the rear leg 13 is formed to be approximately half of the other parts of the rear leg 13. The And the vehicle width direction thickness of the front leg 11 and the vehicle width direction thickness of the rear leg 13 substantially correspond. Therefore, as shown in FIGS. 4 and 5, when the vehicle body frame is observed from the front-rear direction, the front legs 11 and the rear legs 13 are aligned so that the positions in the vehicle width direction coincide with each other and appear to overlap. Moreover, the handrail member 15 is arrange | positioned inside the vehicle width direction rather than the front leg 11 and the rear leg 13, and as shown in FIGS. 1-3, it extends straightly in the front-back direction.

  Each push bar 17 extends in the vertical direction, and as shown in FIG. 1, the lower end of the push bar 17 is connected to the central region in the vertical direction of the rear leg 13, and the upper end of the push bar 17 is coupled to the end of the handle 27. The thickness in the vehicle width direction of the push rod 17 is equal to the thickness in the vehicle width direction of the front legs 11 and the rear legs 13. Therefore, as shown in FIGS. 4 and 5, when the vehicle body frame is observed from the front-rear direction, the push rod 17 and the front leg 11 or the rear leg 13 are aligned and overlapped so that the positions in the vehicle width direction coincide with each other. Further, as shown in FIG. 3, when the vehicle body frame is observed from above, the push rod 17 and the rear leg 13 are aligned so that the positions in the vehicle width direction coincide with each other and appear to overlap. The handrail member 15 is disposed on the inner side in the vehicle width direction than the push bar 17.

  A rear leg bracket 16 is provided in the center region in the vertical direction of each rear leg 13. The pair of rear leg brackets 16 are disposed adjacent to the vehicle width direction inner side than the pair of rear legs 13. Referring to FIG. 6 showing an enlarged structure around the rear leg bracket 16, each rear leg bracket 16 is bent and extended substantially in an L shape, and the rear leg 13 has one L-shaped end side as a lower end region. And protrudes rearward from the rear leg 13 with the L-shaped other end side as the upper end region. The upper end region of each rear leg bracket 16 is rotatably connected to the lower end portion of the push rod 17 via a swing shaft 26 extending in the vehicle width direction. A lower end region of each rear leg bracket 16 is rotatably connected to the rear leg 13 via a rotation shaft 24 extending in the vehicle width direction. However, as shown in FIG. 6, the lower end region of the rear leg bracket 16 is bent so that its lowermost end is displaced forward from the core of the rear leg 13. Further, a protruding portion 13 p that protrudes forward from the center of the rear leg 13 is formed in the vertical center region of the rear leg 13. The projecting portion 13p and the lowermost end of the rear leg bracket 16 are connected via the rotation shaft 24.

  A support portion 13s is provided on the rear surface of each rear leg 13 in the central region in the vertical direction. The support portion 13s protrudes rearward, and its tip is recessed so as to receive the lower end of the push rod 17. As a result, the support portion 13 s suitably receives the pressing force input from the push rod 17. Specifically, as shown in FIGS. 2 and 6, the lower end portion of the push rod 17 is formed in a semicircular shape when observed in the vehicle width direction. Further, the tip of the support portion 13s is formed in a semicircular shape so as to correspond to the round shape at the lower end of the push rod 17. The lower end portion of the push rod 17 is abutted against the support portion 13s.

  Although not shown in FIG. 6, each rear leg bracket 16 is connected to the lower end of the backrest support rod 28 via the swing shaft 26 as shown in FIG. 1. Each rear leg bracket 16 is connected to another support rod 30 at a portion between the upper swing shaft 26 and the lower rotation shaft 24. Further, each rear leg bracket 16 is a portion between the upper swing shaft 26 and the lower rotation shaft 24, and a rear end portion of the seat support rod 19 via a rotation shaft extending in the vehicle width direction. Concatenate with The rear end of each seat support bar 19 is coupled to the vehicle width direction end of the seat coupling member 29. On the other hand, the front end of each seat support bar 19 is connected to the center region in the vertical direction of the front leg 11 via a rotation shaft. The pair of seat support bars 19 and the seat coupling member 29 support a seat of an infant seat (not shown).

  As shown in FIGS. 3 to 5, the backrest support rod 28 that rises from the rear leg bracket 16 is an inverted U-shaped member, and is the upper end portion of one backrest support rod in the vehicle width direction and the other in the vehicle width direction. The upper end of the back support bar is smoothly joined. Note that one lower end portion and the other lower end portion of the backrest support rod 28 are attached to the inner sides in the vehicle width direction of the respective rear leg brackets 16. The backrest support rod 28 supports a backrest portion of an infant seat (not shown). The backrest support rod 28 is connected to the rear end portion of the handrail member 15 through a shaft 31 as shown in FIG. The frame members of the body frame such as the front legs 11, the rear legs 13, the push rods 17, the seat support rods 19, and the vehicle width direction members always support the load of the infant seat, and the operator of the back-to-face switching baby carriage pushes the push rods 17. Take the force applied to the. The non-frame members such as the handrail member 15, the back support rod 28, and the support rod 30 do not bear the load of the infant seat and the force of the push rod 17 unlike the vehicle body frame, so The attachment strength may be smaller than the frame member of the body frame.

  The reverse U-shaped back support rod 28 may be attached so as to suspend the back of an infant seat (not shown). Preferably, the reclining function of the infant seat may be realized by changing the distance from the backrest support rod 28 to the backrest supported by the backrest support rod 28. In any case, the backrest support rod 28 is disposed on the inner side in the vehicle width direction than the handrail member 15. Thereby, the backrest support bar 28 does not interfere with the push bar 17 disposed on the outer side in the vehicle width direction than the handrail member 15.

  The inverted U-shaped support bar 30 is disposed on the inner side in the vehicle width direction than the inverted U-shaped backrest support bar 28, and supports the backrest of the infant seat that is tilted backward to a substantially horizontal state, for example. One lower end portion and the other lower end portion of the support bar 30 are attached to the inner side in the vehicle width direction of each rear leg bracket 16.

  The back-to-face switching baby carriage of this embodiment can be folded. In the folding operation, the unfolded unfolded state locking mechanism that holds the unfolded state shown in FIGS. 1 to 6 is released, the push bar 17 is lifted away from the support portion 13s, and the rear leg bracket 16 is turned upside down. To do. As the rear leg bracket 16 is turned upside down, the seat support bar 19 rotates rearward so that the rear end is lower than the front end, and pulls the front leg 11 toward the rear leg 13. Then, the front leg 11 and the rear leg 13 approach the handrail member 15 around the rotation shaft at the upper end of the front leg 11 and take the upright posture together with the handrail member 15 and the seat support bar 19. Further, the push rod 17 and the back support rod 28 are displaced to a lower position than in the unfolded state, and are in an upright posture. Thereby, the back-to-face switching baby carriage is brought into a folded state in which the front-rear direction and the height direction are reduced as compared with the unfolded state.

  Next, the facing pressing position of the push rod 17 will be described. FIGS. 7 to 11 are views showing the facing pressing position of the push rod 17, FIG. 7 is a perspective view, FIG. 8 is a side view, FIG. 9 is a plan view, and FIG. 10 is a front view. 11 is a rear view, and FIG. 12 is an explanatory view showing an enlarged connection portion between the push rod and the rear leg.

  Each push rod 17 can swing back and forth around a swing shaft 26 provided at the lower end thereof, as shown in FIGS. And can be swung to the front facing position. Then, the push rod 17 is held at the back pushing position or the face pushing position by a push rod locking mechanism (not shown). The lower end region of each push rod 17 extends substantially parallel to the upper end region of the front leg 11 as shown in FIG. As shown in FIG. 12, the lower end of the push rod 17 is received and supported by the semicircular recess of the support portion 13 s, and the upper end of the rear leg 13 and the upper end of the front leg 11 support the middle portion of the push rod 17 in the vertical direction. .

  By the way, according to the present embodiment, a pair of rear leg brackets 16 provided in the center region in the vertical direction of the rear legs 13 and lower ends thereof are respectively attached to the rear leg brackets 16 via the swing shafts 26 so that the rear A pair of push rods 17 that can be swung between a back pushing position and a front facing pushing position are provided. As shown in FIGS. 5 and 11, the vehicle width direction position of the lower end portion of the push rod 17 overlaps with the vehicle width direction position of the center region in the vertical direction of the rear leg 13. Thereby, even if the operator of the back-to-face switching baby carriage pushes and pulls the push bar 17, the force of the push bar 17 is directly input to the rear leg 13 through the support portion 13s. Therefore, the force of the push rod 17 is not transmitted in the vehicle width direction, and the play of the push rod and the vehicle body frame, which has been a problem in the prior art, can be reduced.

  Further, according to the present embodiment, as shown in FIG. 6, the upper end of the rear leg bracket 16 protrudes rearward from the rear leg 13, and the push bar 17 moves away from the rear leg 13 as it goes upward from the swing shaft 26 at the back pushing position. It extends like so. Further, as shown in FIG. 8, the push rod 17 extends along the upper end portion of the rear leg 13 at the facing pressing position. As a result, even if the operator of the face-to-face switching baby carriage pushes and pulls the push bar 17, the force of the push bar 17 is directly input to the rear leg 13 through the support portion 13s.

  In addition, according to the present embodiment, a pair of handrail members 15 that are disposed on the inner side in the vehicle width direction than the push rod 17 and extend rearward from the upper end portion of the rear leg 13 are further provided. Thereby, the infant seat space between the pair of handrail members 15 and the swing region of the push rod 17 located on the outer side in the vehicle width direction of the pair of handrail members 15 can be separated.

  Further, according to the present embodiment, the infant seat back support bar 28 that extends upward with the lower end portion supported by the rear leg 13 is further provided, and the rear end portion of the handrail member 15 is supported by the back support rod 28 via the shaft 31. It connects with the center area of the up-down direction. Thereby, the backrest support rod 28 is stably supported.

  Moreover, according to this embodiment, it is further provided with a pair of seat support rods 19 extending in the front-rear direction, and the front end portion of the seat support rod 19 is rotatably attached to the center portion in the vertical direction of the front leg 11. A rear end portion of the support bar 19 is rotatably connected to the rear leg bracket 16. The rear leg bracket 16 is arranged so as to be shifted in the vehicle width direction when viewed from the center region in the vertical direction of the rear leg 13 and the lower end portion of the push bar 17. A lower end portion of the rear leg bracket 16 is rotatably connected to a central region in the vertical direction of the rear leg 13 via a rotation shaft 24. An upper end portion of the rear leg bracket 16 is connected to a lower end portion of the push rod 17 via a swing shaft 26 so as to be swingable. And it is comprised so that the upper end part and lower end part of the rear leg bracket 16 may be folded upside down and rotated. Thereby, when the back-to-face switching baby carriage is not used, it can be folded and reduced.

  Further, according to the present embodiment, the upper end portion of the front leg 11 and the upper end portion of the rear leg 13 are formed by being cut out so as to receive each other, and as shown in FIGS. 4, 5, 10, and 11, 11 in the vehicle width direction position of the vertical center region overlaps the vehicle width direction position of the vertical center region of the rear leg 13. Thus, even if the operator of the face-to-face switching baby carriage pushes and pulls the push rod 17, the force of the push rod 17 is input to the front leg 11 via the upper end portion of the rear leg 13 without passing through a member extending in the vehicle width direction. It is possible to reduce the backlash of the push rod and the body frame, which has been a problem in the above.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The face-to-face switching baby carriage according to the present invention is advantageously used in child-care equipment.

11 front leg, 13 rear leg, 13s support part, 15 handrail member,
16 rear leg bracket, 17 push rod, 19 seat support rod,
21 front leg coupling member, 23 rear leg coupling member, 24 pivot shaft,
26 Oscillating shaft, 27 Handle, 28 Back support rod,
29 seat coupling member, 30 support rod, 31 shaft.

Claims (3)

A pair of front legs that have a front wheel at the lower end and are spaced apart in the vehicle width direction;
A pair of rear legs that have rear wheels at the lower end and are spaced apart in the vehicle width direction;
At least one vehicle width direction member extending in the vehicle width direction and connecting the pair of front legs and / or the pair of rear legs to each other;
A pair of rear leg brackets provided respectively in the vertical center region of the rear legs;
A pair of push rods whose lower ends are respectively attached to the rear leg brackets via a swinging shaft and swingable to a rear back pushing position and a front facing pushing position;
A pair of handrail members disposed on the inner side in the vehicle width direction than the push rod and extending rearward from the upper end of the rear leg;
A lower end portion is connected to the rear leg or the rear leg bracket via a shaft, a vertical center region is connected to a rear end portion of the handrail member via the shaft, and an upper end region extends upward beyond the handrail member. A pair of extending back support bars,
The back-to-face switched baby carriage , wherein the position in the vehicle width direction of the lower end of the push bar overlaps with the position in the vehicle width direction of the center region in the vertical direction of the rear leg .   The back-to-face switching baby carriage according to claim 1, wherein the back support bar is disposed on the inner side in the vehicle width direction than the handrail member.   The back-to-face switching baby carriage according to claim 1 or 2, wherein upper end portions of the back support bars are connected to each other.

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