JP6548361B2 - baby carriage - Google Patents

Description

  The present invention relates to a baby carriage.

  Generally, a plurality of frames constituting a stroller, such as a handrail, a front leg and a rear leg, are formed of metal cylindrical members such as pipes made of aluminum alloy (e.g., Patent Document 1). A member formed of hard plastic, for example, polypropylene, is connected to an end of some of the plurality of frames by a connection mechanism. The hard plastic members are, for example, wheel mounting parts, foot rests, and arm rests.

  16 is a front view of a conventional connection mechanism, and FIG. 17 is a cross-sectional view taken along line F-F of FIG. Referring to FIGS. 16 and 17, a mounting portion 132 of the cylindrical rear wheel 131 is fastened to a distal end of the cylindrical rear leg 130 by a separate fastening member, for example, a rivet 181. That is, two through holes 182 aligned in a direction orthogonal to the longitudinal axis of the rear leg 130 are formed on the side surface of the tip portion of the rear leg 130. Similarly, two through holes 183 aligned in a direction perpendicular to the longitudinal axis of the rear leg 130 are formed on the side surface of the mounting portion 132 of the rear wheel 131. The rear leg 130 and the rear wheel 131 are connected by inserting the rivets 181 into the through holes 182, 183. Other fasteners include bolts, nuts and bush nuts.

  FIG. 18 is a front view of another conventional connection mechanism, and FIG. 19 is a cross-sectional view taken along line G-G of FIG. Referring to FIGS. 18 and 19, the mounting portion 133 of the cylindrical rear wheel 131 is snapped to the distal end of the cylindrical rear leg 130 by snap fitting. That is, on the side surface of the mounting portion 133 of the rear wheel 131, two claws 191 are formed. Further, two through holes 192 are formed on the side surface of the tip end portion of the rear leg 130 at positions facing the respective claw portions 191 of the attachment portion 133 of the rear wheel 131.

  Each of the claws 191 is defined in a beam shape of which one end is supported by a U-shaped notch 133 a formed on the side surface of the mounting portion 133 of the rear wheel 131. On the inner surface of the claw portion 191, an inward projecting protrusion 193 is formed. The two claws 191 are disposed to face each other in the direction orthogonal to the longitudinal axis of the rear leg 130.

  When the distal end of the rear leg 130 is inserted from the inlet opening of the mounting portion 133 of the rear wheel 131, the surface or edge of the distal end of the rear leg 130 abuts against the projection 193 of the claw 191 to make the claw 191 elastic. Transform it. That is, the surface or the edge of the tip of the rear leg 130 is in contact with the protrusion 193 of the claw 191 and guides the claw 191 to elastically deform outward, toward the entrance opening side of the protrusion 193 of the claw 191 Is a sloped guide surface 193a. When the tip end portion of the rear leg 130 is further inserted into the mounting portion 133 of the rear wheel 131, the projection 193 of the claw portion 191 reaches the through hole 192 of the rear leg 130 and the elastic deformation of the claw portion 191 is restored. Snap through the through hole. Thereby, the rear leg 130 and the rear wheel 131 are connected.

  Even if an attempt is made to release the connection by pulling one of the rear leg 130 and the rear wheel 131 in a connected state, the projection 193 of the claw portion 191 is locked in the through hole 192 of the rear leg 130 and the connection is not released. . That is, on the opposite side of the entrance opening of the projection 193 of the claw 191 so that the projection 193 of the claw 191 is locked in the through hole 192 of the rear leg 130, an engagement perpendicular to the longitudinal axis of the rear leg 130. Stop face 193 b is formed. Therefore, in order to release the connection between the rear leg 130 and the rear wheel 131, there is no way other than applying an excessive force to destroy the projection 193 of the claw portion 191. This is a so-called connection mechanism by fitting.

JP 2007-98995 A

  According to the conventional connection mechanism described above with reference to FIGS. 16 and 17, since a separate fastening member such as the rivet 181 is used, the number of parts increases, the assembly time increases, and the parts cost also increases. I will. In addition, since the arrangement of the through holes 182 of the distal end portion of the rear leg 130 and the attachment portion 132 of the rear wheel 131 is rotationally symmetrical about the longitudinal axis of the rear leg 130, the mounting direction may be mistaken during assembly work There is also a fear.

  According to another conventional connection mechanism described above with reference to FIGS. 18 and 19, as in the case of a fastening member such as the rivet 181 of FIGS. 16 and 17, it is perpendicular to the longitudinal axis of the rear leg 130. It can not produce a strong fastening force. Therefore, the projections 193 of the two claws 191 of the rear wheel 131 that engage with the two through holes 192 of the rear leg 130 aligned in a direction orthogonal to the longitudinal axis of the rear leg 130 are the longitudinal axis of the rear leg 130 And the rear leg 130 and the rear wheel 131 mutually rock about the rocking axis. In addition, since the arrangement of the two through holes 192 at the tip of the rear leg 130 and the arrangement of the two claws 191 of the mounting portion 133 of the rear wheel 131 are rotationally symmetrical around the longitudinal axis of the rear leg 130 There is also a possibility that the direction of attachment may be mistaken at times.

  An object of the present invention is to provide a stroller having a coupling mechanism which has a small number of parts, can be easily and accurately coupled, and realizes a firm coupling.

According to one aspect of the present invention, there is provided a coupling mechanism comprising: a first member having at least two locking portions; and a second member coupled to the first member, the at least two locking portions Each of the parts is disposed apart from each other in the direction of connection with the second member, and the second member has at least two locked parts that respectively lock with the at least two locking parts, A stroller provided with a connection mechanism in which the first member and the second member are connected by locking each of the locking portion and the locked portion is provided.

Before SL has a first member 2 of the locking portion, the two locking portions are, relative to the central axis of the first member may be disposed opposite to each other.

Before SL least one connecting portion of the first member and the second member may be formed in a cylindrical shape.

Before Symbol locking portion has a projection, the object engaging unit, the protrusion of the locking portion may be have a recess for locking.

Before Symbol locking portion may be formed on the elastically deformable beam-shaped.

The projection of the front Kigakaritome portion has a guide surface and the locking surface, the when linking the first member and the second member, the guide surface of the locking portion and the second member and The connection is completed after the locking portion is elastically deformed due to the contact, and after the connection of the first member and the second member, the locking surface of the locking portion and the recess of the locked portion are connected. the locking portion is not elastically deformed, it may be rather can uncoupled by preparative is locked.

According to an aspect of the present invention, it is possible to achieve a common effect of providing a stroller having a connection mechanism which has a small number of parts, can be easily and accurately connected, and realizes a firm connection.

It is a perspective view of a stroller. It is an expansion perspective view of a rear leg and a rear wheel of a stroller of FIG. It is a front view of a connection mechanism concerning a 1st embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3; It is a fragmentary perspective cross-sectional view which shows another aspect of the connection mechanism which concerns on 1st Embodiment of this invention. It is a front view which shows the further another aspect of the connection mechanism which concerns on 1st Embodiment of this invention. It is sectional drawing by line B-B of FIG. It is a front view of the connection mechanism concerning a 2nd embodiment of the present invention. It is sectional drawing by line CC of FIG. It is a front view of the connection mechanism concerning a 3rd embodiment of the present invention. It is sectional drawing by line DD of FIG. It is a front view of the connection mechanism concerning a 4th embodiment of the present invention. It is sectional drawing by line E-E of FIG. It is a perspective view of the rear leg of FIG. FIG. 13 is a perspective view of a rear leg according to another aspect of the rear leg of FIG. 12; It is a front view of the conventional connection mechanism. It is sectional drawing by line FF of FIG. It is a front view of another conventional connection mechanism. It is sectional drawing by line G-G of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are given the same reference numerals throughout the drawings.

  FIG. 1 is a perspective view of a stroller 1. The baby carriage 1 has a seat body 10 for carrying an infant, a pair of left and right front legs 20 and rear legs 30 for supporting the seat body 10, a handrail 40 held by the guardian when pushing the stroller 1, and fall prevention for infants And a pair of left and right arm rests 50 and a front guard arm 60. In the present specification, in the description of each component, the front viewed from the baby sitting on the stroller 1 is referred to as "front", and the opposite side is defined as "rear".

  The seat body 10 has a seat 11 on which the baby sits, a backrest 12 on which the baby leans, and a baby belt 13 for safely restraining the baby with respect to the stroller 1. The backrest 12 can change the inclination angle with respect to the seat 11, that is, recline. In addition, the seat body 10 is entirely covered by a cushion material 14. A hood 15 is attached to the upper portion of the seat body 10, that is, the upper portion of the backrest 12. Below the sheet body 10, a weir 16 capable of containing an article is provided.

  A front wheel 21 is rotatably connected to the lower end of each of the front legs 20 and a rear wheel 31 is rotatably connected to each lower end of the rear leg 30 by a connection mechanism 80 described later. The front wheel 21 and the rear wheel 31 allow the baby carriage 1 to freely travel forward and backward and left and right. Further, the lower end portions of the left and right front legs 20 are connected by a footrest 22 on which the sitting infants put their feet. The upper end of each of the front leg 20 and the rear leg 30 is pivotally attached in the front-rear direction to the front end of the corresponding left and right arm rests 50. The guard arm 60 is formed in an arc shape as a whole and is formed to be bendable. Both ends of the guard arm 60 are detachably attached to upper front ends of the corresponding left and right arm rests 50.

  The handrail 40 is formed in a substantially U-shape. The upper part of the handrail 40 is covered by the cushioning material 41 because it is gripped by the guardian when pushing the stroller 1. A lock operation mechanism 70 is provided at the upper central portion of the handrail 40. The left and right lower end portions of the hand lever 40 are connected to a known switching lock mechanism 71. The lock operation mechanism 70 has an operation wire (not shown), and the operation wire is connected to the switching lock mechanism 71 through the inside of the hand lever 40.

  The baby carriage 1 can be used in one of the switching lock mechanisms 71 operated by the lock operation mechanism 70, that is, in the deployed state where it can be moved while carrying and holding the baby, and in the unused state, that is, compactly stored. It is possible to switch between two different folding states. In other words, the switching lock mechanism 71 fixes the baby carriage 1 in either the unfolded state or the folded state.

  In addition, the handwheel 40 of the stroller 1 can be switched between the back surface pressing position and the facing surface pressing position by another mechanism of the switching lock mechanism 71. The back pushing position is a position where the handrail 40 is disposed on the rear side so that the guardian can be located on the back of the baby and push the baby carriage 1 forward of the baby. On the other hand, the face-to-face pressing position is a position at which the guardian is placed facing the baby and the hand pushing rod 40 is disposed on the front side so that the baby carriage 1 can be pushed toward the rear of the baby. In other words, the switching lock mechanism 71 fixes the hand lever 40 at either the back pushing position or the facing pushing position.

  Subsequently, the connection mechanism according to the present invention will be described. FIG. 2 is an enlarged perspective view of the rear leg 30 and the rear wheel 31 of the stroller of FIG. As shown in FIG. 2, the mounting portion 32 of the rear wheel 31 is inserted into the distal end portion of the rear leg 30, and the rear leg 30 and the rear wheel 31 are connected by the connection mechanism 80. The rear leg 30 is formed of a metal cylindrical member, for example, a pipe made of an aluminum alloy. Further, the attachment portion 32 of the rear wheel 31 is formed in a tubular shape from hard plastic, for example, polypropylene.

  FIG. 3 is a front view of the connection mechanism 80 according to the first embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. In the rear wheel 31 of FIG. 3 and FIG. 4, the portions other than the mounting portion 32 are drawn with omission.

  Referring to FIG. 3 and FIG. 4, the mounting portion 32 of the cylindrical rear wheel 31 is fastened to the distal end of the cylindrical rear leg 30 by snap fitting. That is, on the side surface of the mounting portion 32 of the rear wheel 31, two claw portions 81 are formed as locking portions. Also, two through holes 82 are provided on the side surface of the tip of the rear leg 30 as a locked portion that locks with the locking portion at a position facing the respective claws 81 of the mounting portion 32 of the rear wheel 31. Is formed.

  In detail, each of the claws 81 is defined in a beam shape of which one end is supported by a U-shaped notch 32 a formed on the side surface of the attachment portion 32 of the rear wheel 31. Since the attachment portion 32 of the rear wheel 31 is formed of hard plastic, each of the claws 81 can be elastically deformed. On the inner surface of the claw portion 81, an inward projecting protrusion 83 is formed. The two claws 81 are arranged in the longitudinal direction of the rear leg 30, that is, in the connecting direction of the rear leg 30 and the rear wheel 31, so as to be separated from each other, that is, separated from each other. Therefore, the two claws 81 are not disposed opposite to each other in the direction orthogonal to the longitudinal axis of the rear leg 30. In addition, the two claws 81 are disposed on the opposite side of the longitudinal axis of the rear leg 30, that is, the central axis.

  When the front end of the rear leg 30 is inserted from the inlet opening of the mounting portion 32 of the rear wheel 31, the surface or edge of the front end of the rear leg 30 abuts against the projection 83 of the claw 81 to make the claw 81 elastic. Transform it. That is, the surface or edge of the tip of the rear leg 30 abuts against the projection 83 of the hook 81 and guides the hook 81 to elastically deform outward, toward the entrance opening side of the projection 83 of the hook 81 A guide surface 83a, which is a slope, is formed. When the distal end of the rear leg 30 is further inserted into the mounting portion 32 of the rear wheel 31, the projection 83 of the claw 81 reaches the through hole 82 of the rear leg 30, and the elastic deformation of the claw 81 is restored. , Snap through holes 82. Thereby, the rear leg 30 and the rear wheel 31 are connected.

  Even if an attempt is made to release the connection by pulling one of the rear leg 30 and the rear wheel 31 in a connected state, the projection 83 of the claw 81 is locked in the through hole 82 of the rear leg 30, and the connection is not released. . That is, on the opposite side of the entrance opening of the projection 83 of the claw 81 such that the projection 83 of the claw 81 is engaged with the through hole 82 of the rear leg 30, engagement perpendicular to the longitudinal axis of the rear leg 30 A stop surface 83b is formed. Therefore, in order to release the connection between the rear leg 30 and the rear wheel 31, there is no way other than applying an excessive force to destroy the projection 83 of the claw 81. This is a so-called connection mechanism by fitting.

  FIG. 5 is a partial perspective cross-sectional view showing another aspect of the connection mechanism 80 according to the first embodiment of the present invention. The connecting mechanism 80 shown in FIG. 5 differs from the connecting mechanism 80 shown in FIGS. 3 and 4 only in the arrangement of the claws 81.

  That is, in the connection mechanism 80 shown in FIGS. 3 and 4, the two claws 81 are arranged at positions opposite to each other, that is, 180 degrees rotated with respect to the longitudinal axis of the rear leg 30, ie, the central axis. It is done. On the other hand, the two claws 81 of the connection mechanism 80 shown in FIG. 5 are arranged at positions rotated 90 degrees in the circumferential direction with respect to the other, that is, at different positions. ing. Note that the rotation angle of one claw 81 with respect to the other may be, for example, 30 degrees or 120 degrees other than 90 degrees.

  By not arranging the two claws 81 so as to be opposite to each other with respect to the central axis of the rear leg 30, it is possible to strengthen the coupling in directions other than the force along the coupling direction. That is, when the vicinity of the connecting portion of the two connected members is curved, or when it is predicted in advance that an unbalanced load is applied to the connecting portion of the two members, the above-mentioned rotation angle is appropriately set. The connection can be further strengthened by this.

  6 is a front view showing still another aspect of the connection mechanism 80 according to the first embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line B-B in FIG. The connection mechanism 80 shown in FIGS. 6 and 7 differs from the connection mechanism 80 shown in FIGS. 3 and 4 only in the number and arrangement of the claws 81.

  That is, in the connection mechanism 80 shown in FIG. 3 and FIG. 4, the two claws 81 are disposed on the opposite sides of the longitudinal axis of the rear leg 30, ie, the central axis. On the other hand, in the connecting mechanism 80 shown in FIGS. 6 and 7, one claw 81 is disposed at a position rotated 90 degrees in the circumferential direction with respect to the other as shown in FIG. The claw portion 81 is further added. Further, the claws 81 arranged at the position rotated by 90 degrees are arranged at an intermediate position between the other two claws 81 in the connecting direction. These three claws 81 may be arranged at equal intervals in the circumferential direction, that is, at positions rotated by 120 degrees from each other. Furthermore, four or more claws 81 may be provided. In addition, the distance between the claws 81 in the connecting direction can be set arbitrarily.

  In addition to the two claws 81 arranged on the opposite side, as described above, by providing the claws 81 arranged at a position rotated 90 degrees in the circumferential direction with respect to one claw 81 The connection to directions other than the force along the direction can be strengthened. Further, by increasing the number of claws 81, the connecting force can be strengthened.

  FIG. 8 is a front view of a connection mechanism 90 according to a second embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along line C-C of FIG. In the rear wheel 31 of FIG. 8 and FIG. 9, parts other than the attaching part 32 are omitted and drawn.

  In the present embodiment, the configuration of the mounting portion 32 of the rear wheel 31 is the same as that of the first embodiment, but the rear leg 34 is different from the first embodiment. That is, in the first embodiment, the rear leg 30 is a tubular member, but in the present embodiment, the rear leg 34 is a solid member.

  With reference to FIGS. 8 and 9, the mounting portion 32 of the cylindrical rear wheel 31 is fastened to the tip of the solid rear leg 34 by snap fitting. That is, on the side surface of the mounting portion 32 of the rear wheel 31, two claw portions 91 are formed as locking portions. In addition, on the side surface of the tip of the rear leg 34, two concave portions 92 are provided at positions facing the respective claws 91 of the mounting portion 32 of the rear wheel 31 as locked portions to be locked with the locking portions. It is formed.

  In detail, each of the claws 91 is defined in a beam shape of which one end is supported by a U-shaped notch 32 a formed on the side surface of the attachment portion 32 of the rear wheel 31. Since the attachment portion 32 of the rear wheel 31 is formed of hard plastic, each of the claws 91 is elastically deformable. An outwardly projecting protrusion 93 is formed on the outer surface of the claw portion 91. The two claws 91 are arranged in the longitudinal direction of the rear leg 34, that is, in the connecting direction of the rear leg 34 and the rear wheel 31, so as to be separated from each other, that is, separated from each other. Therefore, the two claws 91 are not disposed opposite to each other in the direction orthogonal to the longitudinal axis of the rear leg 34. Further, the two claws 91 are disposed on the opposite sides of the longitudinal axis of the rear leg 34, that is, the central axis.

  When the distal end of the rear leg 34 is inserted from the inlet opening of the attachment portion 32 of the rear wheel 31, the surface or edge of the distal end of the rear leg 34 abuts against the projection 93 of the claw 91 to make the claw 91 elastic. Transform it. That is, the surface or the edge of the tip of the rear leg 34 is in contact with the projection 93 of the claw 91 and guides the claw 91 to elastically deform outward, toward the entrance opening side of the projection 93 of the claw 91 Is a sloped guide surface 93a. When the distal end of the rear leg 34 is further inserted into the mounting portion 32 of the rear wheel 31, the projection 93 of the claw 91 reaches the recess 92 of the rear leg 34, and the elastic deformation of the claw 91 is restored. Snap fit into recess 92. Thereby, the rear leg 34 and the rear wheel 31 are connected.

  Even when the rear leg 34 and the rear wheel 31 are connected to pull one of them to release the connection, the projection 93 of the claw portion 91 is engaged with the recess 92 of the rear leg 34, and the connection is not released. That is, the recess 92 of the back leg 34 is formed complementarily to the protrusion 93 of the hook 91 such that the projection 93 of the hook 91 is engaged with the recess 92 of the back leg 34. Therefore, in order to release the connection between the rear leg 34 and the rear wheel 31, there is no way other than applying an excessive force to destroy the projection 93 of the claw 91. This is a so-called connection mechanism by fitting.

  FIG. 10 is a front view of a connection mechanism 100 according to a third embodiment of the present invention, and FIG. 11 is a cross-sectional view taken along line D-D in FIG. In the rear wheel 31 of FIG. 10 and FIG. 11, parts other than the attachment part 33 are omitted and drawn.

  In the present embodiment, the configuration of the rear leg 30 is the same as that of the first embodiment, but the shape of the mounting portion 33 of the rear wheel 31 is different from that of the first embodiment. That is, in the first embodiment, the front end portion of the rear leg 30 is inserted into the mounting portion 32 of the rear wheel 31, but in the present embodiment, the mounting portion 33 of the rear wheel 31 is the front end of the rear leg 30 It is the structure inserted in a part.

  Referring to FIGS. 10 and 11, the mounting portion 33 of the cylindrical rear wheel 31 is fastened to the distal end of the cylindrical rear leg 30 by snap fitting. That is, on the side surface of the mounting portion 33 of the rear wheel 31, two claw portions 101 are formed as locking portions. In addition, two through holes 102 are provided on the side surfaces of the tip of the rear leg 30 as a locked portion that locks with the locking portion at a position facing the respective claws 101 of the mounting portion 33 of the rear wheel 31. Is formed.

  In detail, each of the claws 101 is defined in a beam shape of which one end is supported by a U-shaped cut 33 a formed on the side surface of the mounting portion 33 of the rear wheel 31. Since the attachment portion 33 of the rear wheel 31 is formed of hard plastic, each of the claws 101 can be elastically deformed. An outwardly projecting projection 103 is formed on the outer surface of the claw portion 101. The two claws 101 are arranged back and forth, in other words, separated from each other in the longitudinal axis of the rear leg 30, that is, in the connecting direction of the rear leg 30 and the rear wheel 31. Therefore, the two claws 101 are not disposed opposite to each other in the direction orthogonal to the longitudinal axis of the rear leg 30. Further, the two claws 101 are disposed on the opposite side of the longitudinal axis of the rear leg 30, that is, the central axis.

  When the mounting portion 33 of the rear wheel 31 is inserted from the inlet opening at the tip of the rear leg 30, the surface or edge of the tip of the rear leg 30 abuts against the projection 103 of the claw 101 to make the claw 101 elastic inward. Transform it. That is, the front end side of the projection 103 of the claw portion 101 is such that the surface or the edge of the tip of the rear leg 30 abuts on the projection 103 of the claw portion 101 and guides the claw portion 101 to elastically deform inward. A guide surface 103a which is a slope is formed. When the attachment portion 33 of the rear wheel 31 is further inserted into the distal end portion of the rear leg 30, the projection 103 of the claw portion 101 reaches the through hole 102 of the rear leg 30, and elastic deformation of the claw portion 101 is restored. The through hole 102 is snapped through. Thereby, the rear leg 30 and the rear wheel 31 are connected.

  Even if an attempt is made to release the connection by pulling one of the rear leg 30 and the rear wheel 31 in a connected state, the projection 103 of the claw portion 101 is locked in the through hole 102 of the rear leg 30, and the connection is not released. . That is, on the opposite side of the tip of the projection 103 of the claw 101 so that the projection 103 of the claw 101 is engaged with the through hole 102 of the rear leg 30, the engagement is orthogonal to the longitudinal axis of the rear leg 30 The surface 103 b is formed. Therefore, in order to release the connection between the rear leg 30 and the rear wheel 31, there is no way other than applying an excessive force to destroy the projection 103 of the claw portion 101. This is a so-called connection mechanism by fitting.

  12 is a front view of a connection mechanism 110 according to a fourth embodiment of the present invention, FIG. 13 is a sectional view taken along line E-E of FIG. 12, and FIG. 14 is a sectional view of the rear leg 35 of FIG. It is a perspective view. In the present embodiment, the mounting portion 36 and the rear leg 35 of the rear wheel 31 are different from those of the first embodiment. In the rear wheel 31 of FIG. 12 and FIG. 13, portions other than the mounting portion 36 are drawn with omission.

  With reference to FIGS. 12 and 13, the mounting portion 36 of the cylindrical rear wheel 31 is fastened to the distal end of the cylindrical rear leg 35 by snap fitting. That is, on the side surface of the tip end portion of the rear leg 35, two claw portions 111 are formed as locking portions. Further, two through holes 112 are formed on the side surfaces of the mounting portion 36 of the rear wheel 31 at positions facing the respective claw portions 111 of the rear leg 35 as locked portions to be locked with the locking portions. ing.

  Specifically, each of the claws 111 forms a U-shaped cut 35a on the side surface of the rear leg 35 formed of a metal cylindrical member, for example, a pipe made of aluminum alloy, and is turned over to be plastic. By deformation (FIG. 14), it is formed in the shape of a beam supported at one end. The claw portion 111 formed by plastic deformation is elastically deformable so as to be restored to this shape. The two claws 111 are arranged in the longitudinal direction of the rear leg 35, that is, in the connection direction of the rear leg 35 and the rear wheel 31, so as to be separated from each other, in other words, separated from each other. Therefore, the two claws 111 are not disposed opposite to each other in the direction orthogonal to the longitudinal axis of the rear leg 35. Further, the two claws 111 are disposed on the opposite sides of the longitudinal axis of the rear leg 35, that is, the central axis.

  When the front end of the rear leg 35 is inserted from the inlet opening of the mounting portion 36 of the rear wheel 31, the surface or edge of the rear end (upper side in FIGS. 12 and 13) of the mounting portion 36 abuts on the claw portion 111 The portion 111 is elastically deformed inward. That is, the guide surface 111 a which is a slope on the outside of the claw portion 111 so that the surface or edge of the rear end of the mounting portion 36 abuts on the claw portion 111 and guides the claw portion 111 to elastically deform inward. Is formed. When the distal end of the rear leg 35 is further inserted into the mounting portion 36 of the rear wheel 31, the claw portion 111 reaches the through hole 112 of the mounting portion 36, and the elastic deformation of the claw portion 111 is restored. Into the through hole 112. Thereby, the rear leg 35 and the rear wheel 31 are connected.

  Even if the rear leg 35 and the rear wheel 31 are connected and one of them is pulled to release the connection, the claw portion 111, particularly the tip end portion 111b of the claw portion 111, is locked to the inner surface of the through hole 112 of the mounting portion 36; There is no disconnection. Therefore, in order to release the connection between the rear leg 35 and the rear wheel 31, there is no way other than applying an excessive force to destroy the claw portion 111. This is a so-called connection mechanism by fitting.

  FIG. 15 is a perspective view of the rear leg 37 according to an aspect different from the rear leg 35 of FIG. The rear leg 37 of FIG. 15 has a convex portion 121 instead of the claw portion 111 of the rear leg 35 of FIG. That is, the convex portion 121 forms, for example, a rectangular through hole 37 a on the side surface of the rear leg 37 formed of a metal cylindrical member such as an aluminum alloy pipe, and the through hole on the tip side of the rear leg 37 It is formed by plastically deforming the peripheral portion of 37a outward. The convex portion 121 formed by plastic deformation is elastically deformable so as to be restored to this shape. The rear leg 37 of FIG. 15 can be engaged with the through hole 112 of the mounting portion 36 in the same manner as the claw portion 111 of the rear leg 35 of FIG. Therefore, the rear leg 37 of FIG. 15 can be used in place of the rear leg 35 in the fourth embodiment.

  In FIG. 14 and FIG. 15, since the claw portion 111 or the convex portion 121 as the locking portion is formed by plastically deforming a part of the rear leg, it is possible to easily process and adjust its shape. .

  In the second embodiment, the third embodiment, and the fourth embodiment, as in the first embodiment, three or more locking portions and locked portions may be provided, and they may be arbitrarily selected in the circumferential direction. They may be arranged at offset positions, and further, they may be arranged at arbitrary intervals in the coupling direction.

  According to the connection mechanism according to the present invention, since a separate fastening member is not used, the number of parts can be reduced and connection can be easily performed in a short time. Further, according to the connection mechanism according to the present invention, since the two claws are not arranged to face each other in the direction orthogonal to the longitudinal axis of the rear leg, the swinging axis as described above is formed. It is not possible to make a firm connection without rocking each other. Furthermore, according to the connection mechanism according to the present invention, the two claws are not arranged to face each other in the direction orthogonal to the longitudinal axis of the rear leg, which may cause the attachment to be misdirected during assembly work. Nor.

  As long as it is a connection mechanism by what is called fitting about the connection mechanism of the tip part of a rear leg or the attachment part of a rear wheel other than embodiment mentioned above, you may employ | adopt arbitrary convex parts and recessed parts. In addition, at least one of the tip of the rear leg or the attachment portion of the rear wheel may not be cylindrical and may be solid. Furthermore, in the case where the number of the locking portions and the number of the locked portions are three or more, at least two may be disposed apart from each other in the connecting direction. That is, in the case where the number of the locking portions and the locked portions is three or more, for example, the two locking portions and the locked portions may be circumferentially offset and may be at the same position in the connecting direction.

  Although the embodiment of the present invention is described above using the connection of the rear leg 30 and the rear wheel 31, the present invention can be connected to other parts, such as the connection of the front leg 20 and the front wheel 21, the connection of the front leg 20 and the armrest 50, The present invention may be applied to the connection of the rear leg 30 and the armrest 50. Moreover, the connection mechanism according to the present invention can be applied not only to the field of baby carriages, but also to other fields where metal members and hard plastic members are connected.

DESCRIPTION OF SYMBOLS 1 baby carriage 10 sheet main body 20 front leg 30 rear leg 31 rear wheel 32 mounting part 40 hand pushing lever 80 connection mechanism 81 claw part 82 through hole

Claims (4)

A coupling mechanism,
A first member having at least two locking portions, and a second member coupled to the first member,
Each of the at least two locking portions is disposed apart from each other in the connecting direction with the second member,
The second member has at least two locked portions that respectively lock with the at least two locking portions;
And a connecting mechanism for connecting the first member and the second member by locking each of the locking portion and the locked portion.
The first member has two the locking portions, and the two locking portions are not disposed opposite to each other with respect to the central axis of the first member ,
The stroller according to claim 1, wherein the locking portion has a protrusion, and the locked portion has a recess to be locked by the protrusion of the locking portion .   The baby carriage according to claim 1, wherein a connecting portion of at least one of the first member and the second member is formed in a tubular shape. The stroller according to claim 1 or 2 , wherein the locking portion is formed in an elastically deformable beam shape. When the protrusion of the locking portion has a guide surface and a locking surface, and the first member and the second member are connected, the second member and the guide surface of the locking portion The connection is completed after the locking portion is elastically deformed by the contact, and after the connection of the first member and the second member, the locking surface of the locking portion and the recess of the locked portion The baby carriage according to any one of claims 1 to 3, characterized in that the locking portion is not elastically deformed by locking and the connection can not be released.

Images