GB2519670A

GB2519670A - Foldable stroller

Info

Publication number: GB2519670A
Application number: GB1418775.1A
Authority: GB
Inventors: Kenji Funakura
Original assignee: Combi Corp
Current assignee: Combi Corp
Priority date: 2013-10-25
Filing date: 2014-10-22
Publication date: 2015-04-29
Also published as: JP6223121B2; JP2015083444A; GB201418775D0

Abstract

A foldable stroller (1, figure 4) comprising a handle bar (40), an unlocking member (45, figure 6) provided at and moving along the handlebar to release a lock (82) for maintaining the stroller in an opened or a folded state, an operating member 71 provided at and moving along the handlebar and connected to the unlocking member to make it move, as well as a locking member 72 arranged integrally with and locking the movement of said operating member, which is pushed toward the handlebar to be unlocked. Preferably the locking member is rod shaped, runs through the handlebar, has a pushing part 72b extending through a hole in the operating member side surface; a locking member projection part 72a retracts into a space 75 formed between the operating member and the handlebar to unlock and abuts against its inner wall to limit the operating member movement (see figure 9).

Description

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DESCRIPTION

Title of Invention: Foldable Stroller

Technical Field

[0001] The present invention relates to a foldable stroller -

Background Art

[0002] Known in the art is a stroller which can be changed between an opened state where it can be pushed and moved while carrying an infant when being used and a folded state wherein it can be compactly stored when not being used (for example, PLT 1) -The stroller of PLT 1 can be changed between the opened state and the fclded state by operating a lock operating mechanism which is provided at the approximate center part of a handle bar which a guardian grips when pushing the stroller so as to unlock the lock mechanism for maintaining the opened state or the folded state.

Citations List Patent Literature [0003] PLT 1: Japanese Patent Publication No. 2007-98995A

Summary of Invention

Technical Problem [0004] In this regard, there is also known a stroller which has a lock operating mechanism such as shown in FIG. 10. The lock operating mechanism of FIG. 10 has a locking member 100 and an operating member 101. The locking member 100 is attached to a handle bar 102 by a shaft 103 and can turn about an axis of rotation vertical to the long direction of the handle bar 102. Further, the locking member 100 is biased clockwise in the figure by a spring etc. In this state, the locking member 100 locks movement of the operating member 101 so that the operating member 101 is not operated unintentionally.

[0005] When changing the stroller between the opened state and the folded state, first, the handle bar 102 is gripped near the locking member 100 (FIG. 10(a)) and the thumb is used to turn the locking member 100 against the biasing force to the front side, i.e. counterclockwise in the figure, so as to unlock the operating member 101.

Next, while maintaining the thumb in the above state, the handle bar 102 is lightly released and the index finger and the middle finger are used to hook the gripping projections lOla of the operating member 101 and grip the operating member 101 (FIG. 10(b)). In this state, the operating member 101 is pulled to the front along the long direction of the handle bar 102, whereby the lock mechanism is unlocked and the opened state and the folded state of the stroller can be changed.

[0006] However, according to this lock operating mechanism, as clear from the differences in arrangement of the hand which are shown in FIG. 1O(a)and FIG. 10(b), the operation for unlocking the locking member 100 and the operation of pulling the operating member 101 forward so as to unlock the lock mechanism are completely independent operations. Therefore, it is difficult to smoothly operate the lock operating mechanism by a series of operations so as to release the lock for maintaining the opened state or the folded state.

[0007] The present invention has as its object the provision of a stroller which has a lock operating mechanism which can be simply and smoothly operated so as to release the lock for maintaining the opened state or the folded state.

Solution to Problem E0008] According to one aspect of the present invention, there is provided a foldable stroller comprising: a handle bar, an unlocking member which is provided at the handle bar and which moves along the handle bar to release a lock for maintaining the stroller in an opened state or a folded state, an operating member which is connected to the unlocking member and is provided at the handle bar and which is made to move along the handle bar to thereby make the unlocking member move, and a locking member which is arranged integrally with the cperating member and which locks movement of the operating member and is pushed in a direction toward the handle bar to thereby be unlocked.

[0009] Further, according to another aspect of the present invention, there is provided a stroller wherein the locking member has a pushing part which protrudes through a hole which is formed in a side surface of the operating member.

(0010] Further, according to another aspect of the present invention, there is provided a stroller wherein a space is formed between the operating member and the handle bar and a projecting part of the locking member is made to retract into the space to thereby unlock it.

(0011] Further, according to another aspect of the present invention, there is provided a stroller wherein movement of the operating member is limited by the projecting part of the iocking member which retracts into the space abutting against the inside wall surface of the space.

(0012] Further, according to another aspect of the present invention, there is provided a stroller wherein the locking member is a rod-shaped member which runs through the handle bar.

Advantageous Effects of Invention [0013] According to the present invenLion, the common effect is exhibited of provision of a stroller which has a lock operating mechanism which can be simply and smoothly operated so as to release the lock for maintaining the opened state or the folded state.

The present invention will be better understood from the attached drawings and description of the preferred embodiments of the present invention, as set out below.

Brief Description of Drawings

[0014] FIG. 1 is a perspective view of a stroller according to an embodiment of the present invention in an opened state.

FIG. 2 is a side view of a stroller with a handle bar at a back pushing position.

FIG. 3 is a side view of a stroller with a handle bar at a facing pushing position.

FIG. 4 is a side view of a stroller in a folded state.

FIG. S is a partial perspective view of a lock mechanism in a locked state.

FIG. 6 is a partial perspective view of a lock mechanism in an unlocked state.

FIG. 7 is a partial perspective view of a lock operating mechanism.

FIG. B is a vertical cross-sectional view of a lock operating mechanism.

FIG. 9 is a view which explains the operation of a lock operating mechanism for unlocking the lock mechanism.

FIG. 10 is a view which explains an unlocking operation of a conventional lock mechanism.

Description of Embodiments

[0015] Embodiments of the present invention will be explained in detail below, while referring to the drawings. Throughout the drawings, corresponding component elements will be assigned common reference notations.

[0016] FIG. 1 is a perspective view of a stroller according to an embodiment of the present invention in an opened state. The stroller 1 has a seat section 10 for carrying art infant, pairs of left and right front legs 20 and rear legs 30 which support the seat section 10, a handle bar 40 which the guardian grips when pushing the stroller 1, and a left and right pair of armrests 50 and a front guard arm 60 for preventing the infant from falling out. It should be noted that, in the explanation of the component members in the Description, the front when seen from the infant seated in the stroller 1 will be defined as the "front" and the opposite side will he defined as the "back".

[0017] Further, FIG. 2 is a side view of a stroller 1 with a handle bar 40 at a back pushing position, while FIG. 3 is a side view of a stroller 1 with a handle bar at a facing pushing position. The "back pushing position" is the position where the handle bar 40 is arranged at the back side so the guardian is positioned at the back of the infant and pushes the stroller 1 toward the front frcm the infant. On the other hand, the "facing pushing position" is the position where the handle bar 40 is arranged at the front side so the guardian is positioned facing the infant and pushes the stroller 1 toward the back from the infant.

[0018] Furthermore, FIG. 4 is a side view of a stroller 1 in a folded state. The state of the stroller 1 which is shown in FIG. 1 to FIG. 3 shows the used state of the stroller 1, i.e. the opened state wherein it can be pushed and moved while carrying an infant, while the state of the stroller 1 which is shown in FIG. 4 shows the non-used state of the stroller 1, i.e. the folded sLate wherein it can be compactly stored.

(0019] Referring to FIG. 1 to FIG. 4, the component members of the stroller 1 will be explained.

[0020] The seat section 10 has a seat part 11 on which the infant sits, a back support 12 against which the infant leans, and an infant belt 13 for safely constraining the infant at the stroller 1. The back support 12 can be changed in its angle of inclination with respect to the seat part 11, i.e. it can be reclined. Further, the seat section 10 is covered entirely by a cushion material 14. At the top part of the seat section 10, i.e. at the top part of the back support 12, a canopy 15 is attached. The canopy 15 can be opened to the front or folded to the back in the opened state of the stroller 1. Below the seat section 10, a basket 16 which can hold supplies is provided.

[0021] At the bottom end parts of the front legs 20, front wheels 21 are rotatably attached. At the bottom end parts of the rear legs 30, back wheels 31 are roLaLably attached. The front wheels 21 and back wheels 31 enable the stroller 1 to be pushed back and forth and to the left and right. Further, the vicinities of the bottom end parts of the left and right front legs 20 are connected by a foot rest 22 on which the two legs of the seated infant can rest. The top end parts of the front legs 20 and rear legs 30 are attached to the front end parts of the corresponding left and right armrests 50 so as to be able to swivel in the front-back direction. The guard arm is formed in an arc shape overall and is formed to be able to be bent. The two end parts of the guard arm 60 are detachably attached to the top parts of the front ends of the corresponding left and right armrests 50.

[0022] The handle bar 40 is formed into an approximate U-shape. At the top part of the handle bar 40, a grip part 40a is provided which extends horizontally in the left-right direction. The grip part 40a is gripped by the guardian when pushing the stroller, so is covered by a cushion material 41. Further, support tubes 4Gb extend downward from the two ends of the grip part 40a. At the left and right support tubes 4Gb near the grip part 40a, later explained lock operating mechanisms 70 are provided. The bottom end parts of the support tubes 40b are attached to the outside surfaces of the rear legs 30 through corresponding left and right brackets 42.

[0023] At the back end parts of the armrests 50, top end parts of connecting rods 80 are rotatably attached.

The left and right of the seat part 11 of the seat section 10 are supported by side frames 18. The front end parts of the side frames 18 extend bent downward along the front legs 20 in the opened state of the stroller 1 and are attached rotatably to the insides of intermediate parts 20a of the front legs 20. The back end parts of the side frames 18 are connected to engagement panels 17 which are provided at the left and right side surfaces of the back part of the seat part 11 of the seat section 10.

[0024] The brackets 42 are thick plate-shaped members which are bent at obtuse angles to be formed into boomerang shapes. The bent positions are formed offset to single sides. The shorter parts of the brackets 42 from the bent positions extend along the support tubes 40b of the handle bar 40 when the handle bar 40 is at the back pushing positicn. At the end parts, as explained later, engagement slots 42a (FIG. 6) are formed. The longer parts of the brackets 42 from the bent positions extend along the rear legs 30 in the opened state of the stroller 1. The end parts are attached rotatably to the outsides of the intermediate parts 30a of the rear legs 30. Further, the bent positions of the brackets 42 and the bottom end parts of the support tubes 40b of the handle bar 40 which are arranged at the outsides are run through by a pair of shaft members 43 which are arranged to extend in the left-right direction.

E0025] The left and right shaft members 43 respectively run through the side surfaces of the stroller 1 from the outside to the inside in order through the bottom end parts of the support tubes 40b of the handle bar 40, the bent positions of the brackets 42, the bottom end parts of the connecting rods 80, the engagement panels 17, and the back end parts of the side frames 18. Therefore, these members can rotaLe about common axes of rotation formed by the shaft members 43.

The bottom end parts of the support tubes 40b of the handle bar 40 are rotatably attached about the shaft members 43 whereby the handle bar 40 can be arranged at the back pushing position which is shown in FIG. 2 and the facing pushing position which is shown in FIG. 3.

[0026) The connecting rods 80 extend in parallel to the support tubes 40b of the handle bar 40 when the handle bar 40 is at the back pushing position. At the outside surfaces of the top parts of the connecting rods 80, locking projections 81 are provided (FIG. 3) . At thc outside surfaces of the armrests 50, locking projections 51 of the same shapes as the locking projections 81 are provided (FIG. 2) . The locking projections 81 of the connecting rods 80 and locking projections 51 of the armrests 50 are arranged concentrically with respect to the shaft members 43 in FIG. 2 and FIG. 3. Further, locking members 44 which have locking parts (not shown) which can engage with these locking projections in a concentric position are attached to the left and right support tubes 40b of the handle bar 40. The locking members 44 are formed into cylindrical shapes and can move in the long directions along the support tubes 40 of the handle bar 40. They are biased downward, i.e. in the direction of the bottom end parts, by not shown biasing means.

[0027] The locking members 44 and the locking projections 81 of the connecting rods 80 or the locking projections 51 of the armrests 50 are unlocked by making the locking members 44 move against the biasing force along the support tubes 40b of the handle bar 40 upward.

When the locking members 44 are returned to the original positions, they are again locked. The handle bar 40 can be nade to swing back and forth in the state with the locking members 44 and the locking projections 81 or locking projections 51 unlocked so as to enable change between the back pushing position and the facing pushing position. That is, when desiring to set the handle bar 40 at the back pushing position (FIG. 2) , the locking members 44 and the locking projections 81 of the connecting rods 80 are locked while when desiring to set the handle bar 40 at the facing pushing position (FIG.

3) , the locking members 44 and the locking projections 51 of the armrests 50 are locked. When the handle bar 40 is set at the back pushing position, as shown in FIG. 2, the handle bar 40 and the front legs 20 and further the connecting rods 80 are parallel. Further, when the handle bar 40 is at the facing pushing position, as shown in FIG. 3, the handle bar 40 and the rear legs 30 are parallel.

[0028] Next, the lock mechanisms for maintaining the opened state or the folded state will be explained. FIG. is a partial perspective view of a lock mechanism in the locked state, while FIG. 6 is a partial perspective view of a lock mechanism in an unlocked state.

[0029] The lock mechanisms have unlock members 45 which are attached to the left and right support tubes 4Db of the handle bar 40 and lock members 82 which are attached to the left and right connecting rods 80. The unlock members 45 are formed in cylindrical shapes and can move in the long directions along the support tubes 40b of the handle bar 40 and are biased by not shown biasing means downward, i.e. in the directions of the bottom end parts. The lock members 82 are formed in cylindrical shapes and can move in the long directions along the connecting rods 80 and are biased by not shown biasing means downward, i.e. in the directions of the bottom end parts.

[0030] In particular, as clearly shown in FIG. 6, at the bottom surfaces of the outsides of the lock members 82, engagement tabs 82a which extend downward are formed.

Further, at the bottom surfaces of the insides of the lock members 82, engagement tabs 82b which extend downward are formed. In the open state of the stroller 1, the engagement tabs 82a of the lock members 82 engage with the engagement slots 42a of the brackets 42 which are complementarily formed and block rotation of the brackets 42 around the shaft members 43. In the same way, -10 -the engagement tabs 82b of the lock members 82 engage with engagement slots 17a of the engagement panels 17 which are complementarily formed and block rotation of the engagement panels 17 around the shaft members 43, i.e. rotation of the side frames 18 of the seat part 11 around the shaft members 43. As shown in FIG. 5, the lock mechanism is in the locked state. As a result, the stroller 1 maintains the opened state.

[0031] At the top parts of the lock members 82, operating plates 83 which extend to the outside, i.e. to the support tube 40b sides of the handle bar 40, are provided. The operating plates 83 are arranged so as to form flat surfaces vertical to the long directions of the connecting rods 80.

(0032] The unlock members 45 have unlock rods 46 which extend to the inside, i.e. the connecting rod 80 sides.

The relative positions of the unlock rods 46 and the operating plates 83 are set so that when the handle bar is at the back pushing position, the unlock rods 46 of the unlock members 45 are arranged directly under the operating plates 83 of the lock members 82. It should be noted that the unlock rods 46 of the unlock members 45 and operating plates 83 of the lock members 82 do not obstruct the swing motion of the handle bar 40 back and forth.

[0033] The unlock members 45 move upward along the support tubes 4Db by operation of the lock operating mechanisms 70 which are provided at the handle bar 40. By upward movement of the unlock members 45, the unlock rods 46 of the unlock members 45 engage with the operating plates 83 of the lock members 82 and the lock members 82 also move upward. Due to the upward movement of the lock members 82, the engagement tabs 82a of the lcck members 82 and the engagement slots 42a of the brackets 42 and the engagement tabs 82b of the lock members 82 and the engagement slots l7a of the engagement panels 17 are disengaged. Therefore, rotation of the brackets 42 about -11 -the shaft members 43 and rotation of the side frames 18 of the seat part 11 about the shaft members 43 become possible. As shown in FIG. 6, the lock mechanism is in Lhe unlocked state. As a result, the stroller 1 can be changed from the opened state to the folded state.

[0034] It should be noted that, as should be clear from the structure of the lock mechanisms, when the handle bar 40 is at the facing pushing position such as shown in FIG. 3, oven when operating the lock operaLing mechanisms 70, it is not possible to unlock the lock mechanisms. In other words, the unlock members 45 and the lock members 82 are separated, so that even when operating the lock operating mechanisms 70, it is not possible to move the unlock members 45 upward and thereby make the lock members 82 move upward.

[0035] Next, the operation when folding the stroller 1 will be explained. First, if the handle bar 40 is at the facing pushing position, before the folding operation, the handle bar 40 is made to move from the facing pushing position (FIG. 3) to the back pushing position (FIG. 2).

[0036] In the state wherein the handle bar 40 is set at the back pushing position, the left and right lock operating mechanisms 70 of the handle bar 40 are simultaneously operated and the lock members 82 are made to move upward through the unlock members 45 to thereby unlock the lock mechanisms. In other words, the lock members 82 and brackets 42 and the lock members 82 and engagemenL panels 17 are disengaged. In this state, if the handle bar 40 is pulled upward to the back, the brackets 42 and the members which are connected by the shaft members 43, i.e. the armrests 50, side frames 18, and connecting rods 80, rotate around the intermediate parts 30a with respect to the rear legs 30, in FIG. 2, slightly in the clockwise direction. Next, the handle bar 40 is pushed downward whereby, assisted by gravity as well, the brackets 42 and the members which are connected by the shaft members 43 further rotate clockwise. By way -12 -of this operation, the stroller 1 is finally changed to the folded state such as shown in FIG. 4.

E0037] As shown in FIG. 4, in the folded stroller 1, the handle bar 40 and front legs 20 are arranged substantially in parallel and the handle bar 40 is arranged lower than when the stroller 1 is in the opened state. Therefore, the folded stroller 1 becomes more compact in size in the front-back direction and top-bottom direction compared with the opened stroller 1 and is in a state suitable for storage.

[0038] In the folded state of the stroller 1, the engagement tabs 82a of the lock members 82 engage with other not shown engagement slots of the brackets 42 which are formed complementarily and block rotation of the brackets 42 about the shaft members 43. In the same way, the engagement tabs 82b of the lock members 82 engage with other engagement slots of the engagement panels 17 which are formed complementarily and block rotation of the engagement panels 17 about the shaft members 43, i.e. rotation of the side frames 18 of the seat part 11 about the shaft members 43. As shown in FIG. 4, the lock mechanism is in the locked state. As a result, the stroller 1 maintains the folded state.

[0039] The stroller 1 is changed from the folded state to the opened state by following the reverse procedure to the above operation when folding it. In other words, the left and right lock operating mechanisms 70 of the handle bar 40 are simultaneously operated and the lock members 82 are made to move upward through the unlock members 45 so as to unlock the lock mechanisms. Next, the handle bar is pulled upward to thereby make the brackets 42 and the members which are connected by the shaft members 43, i.e. the armrests 50, side frames 18, and connecting rods 80, rotate from the rear legs 30 counterclockwise in FIG. 4, the stroller 1 is changed to the opened state, and the lock mechanisms are again locked to maintain the opened state.

-13 - [0040] Next, the lock operating mechanisms 70 will be explained. FIG. 7 is a partial perspective view of a lock operating mechanism 70, while FIG. B is a vertical cross-sectional view of a lock operating mechanism 70. The lock operating mechanism 70 has an operating member 71, a locking member constituted by a locking pin 72, wire fastening pin 73, and operating wire 74.

(0041] The operating member 71 is formed in a cylindrical shape and can move in the long direction along a support tube 40b of the handle bar 40. In the state attached to the handle bar 40, at the side surface of the operating member 71 in the left and right direction, the top part expands outward, while the bottom part is bent inward. As a result, as shown in FIG. B, the top part of the operating member 71 forms a ring-shaped space 75 with a support tube 40b of the handle bar 40 or a space 75 in at least the left-right direction. On the other hand, the bottom part of the operating member 71 is solid.

(0042] At a side surface of the operating member 71, in the left-right direction, an locking pin 72 is inserted from a corresponding hole 71a at the top part. A wire fastening pin 73 is inserted through a corresponding hole 71b to hole 71b at the bottom part. In other words, the locking pin 72 is inserted into the operating member 71, but its front end does not pass through the operating member 71. At the support tube 40b of the handle bar 40, circular holes 40c of substantially the same diameters as the locking pin 72 are formed at corresponding positions so that the locking pin 72 is inserted through them.

Further, at the support tube 4Db of the handle bar 40, elongated holes 40d which extend in the long direction arc formed at corresponding positions so that the wire fastening pin 73 is inserted through them.

[0043] The locking pin 72 is a rod-shaped member which has a small diameter pin body 72a and a large diameter pushing part 72b. In the state wherein the locking pin 72 -14 -inserted into the operating member 71, a coil spring 76 is arranged between the pushing part 72b of the locking pin 72 and the support tube 40b of the handle bar 40. At this time, the pin body 72a of the locking pin 72 runs through the coil spring 76. The pushing part 72b of the locking pin 72 extends through the hole 71a from the operating member 71 outward. In other words, the locking pin 72 is arranged integrally with the operating member 71 and locks movement of the operating member 71.

[0044] The wire fastening pin 73 passes through the operating member 71 and is fastened at its end parts by a nut or rivet so as not to be pulled out. The operating wire 74 is arranged inside the hollow support tube 40b of the handle bar 40. Inside of the support tube 40b, a first end of the operating wire 74 is connected to the wire fastening pin 73. The other end is connected to the unlock member 45. As explained above, the unlock member is biased downward, whereby the wire fastening pin 73 which is connected to the unlock member 45 and in turn the operating member 71 in which the wire fastening pin 73 is inserted is biased downward.

[0045] FIG. 9 is a view which for explaining the operation of the lock operating mechanism for unlocking the lock mechanism. The lock operating mechanism shown in FIG. 9(a) is in the same state as the lock operating mechanism which is shown in FIG. 7 and FIG. 8. At this time, the wire fastening pin 73 is arranged at the bottom part of the elongated hole 40d which extends in the long direction of the support tube 40b.

[0046] To unlock the lock mechanism, from this state, first, the pushing part 72b of the locking pin 72 is pushed against the biasing force of the coil spring 76 in the direction toward the support tube 4Gb of the handle bar 40 and made to retract into the space 75 (FIG. 9(b)).

As a result, the operating member 71 and the locking pin 72 are unlocked. Next, the operating member 71 is made to move upward along the support tube 40b of the handle bar -15 - (FIG. 9(c)). At this time, the locking pin 72 is limited in upward movement by the circular holes 40c of the support tube 4Gb through which it passes. On the other hand, the wire fastening pin 73 moves upward in the elongated holes 40d of the support tube 40b. The upward movement of the operating member 71 is restricted by the locking pin 72 abutting against the inside wall surface of the space 75 of the operating member 71, for example, the bottom end surface, or the wire fastening pin 73 abutting against the top parts of the elongated holes 40d of the support tube 40b.

[0047] The wire fastening pin 73 moves upward along with the operating member 71, whereby the operating wire 74 which is connected at one end to the wire fastening pin 73 also moves upward. As a result, the unlocking member 45 which is connected to the other end of the operating wire 74 also moves upward and the lock mechanism is unlocked. The unlocking member 45, as explained above, is biased downward, so that if the force for making the operating member 71 move upward is released, the lock operating mechanism is automatically reset to the state shown in FIG. 9(d). As a result, the state shown in FIG. 9(a) wherein the pushing part 72b of the engagement pin 72 is held in the hole 7la of the operating member 71 is returned to.

[0048] The series of operations from FIG. 9(a) to FIG. 9(d) to return again to the state of FIG. 9(a) is performed by gripping the top part of the operating member 71 with the thumb arranged downward or gripping the bottom part of the operating member 71 with the thumb arranged upward and using the thumb or another finger to push in the locking pin 72. In other words, the direction of exerting force for gripping the operating member 71 and the direction of exerting force for pushing in the locking pin 72 are the same. Further, the locking pin 72 is arranged integrally with the operating member 71, so that the locking pin 72 can be pushed and the operating -16 -member 71 can be gripped simultaneously. Therefore, in this state, i.e. without changing the arrangement of fingers or arrangement of the palm after pushing in the locking pin 72, it is possible to make the operating member 71 move upward. For this reason, according to the lock operating mechanism according to the present invention, it is possible to simply and smoothly operate the mechanism to release the lock maintaining the opened state or the folded state of the stroller 1 and therefore its convenience is enhanced.

[0049] In the above embodiment, the locking member constituted by the locking pin 72 runs through the support tube 4Gb of the handle bar 40 so as to make the operating member 71 and the support tube 40b engage.

However, so long as being arranged integrally with the operating member 71 and being configured to stop movement of the operating member 71 and being released by being pushed in a direction toward the handle bar 40, the locking member may be configured in any way. For this reason, the locking member being integrally arranged with the operating member includes, as shown in the above embodiment, not only the state wherein the locking member is included in the operating member, but also the state wherein it is adjacent or in close proximity.

The present invention has been explained in detail based on specific embodiments. However, a person skilled in the art could make various changes, modifications, etc. without departing from the claims and concepts of the present invention.

Reference Signs List [0050] 1 stroller seat section 20 front legs rear legs handle bar -17 -unlocking member armrest guard arm lock operating mechanism 71 operating member 72 locking member connecting rod -18