JPH0848253A - Folding stroller - Google Patents

Abstract

PURPOSE:To improve the operability of a collapsible baby carriage by constituting the collapsible baby carriage in such a way that the a hand push rod can be lowered or raised in a moment by releasing stopper locking for securing the stop position of the hand push rod and the assembly or collapsing operation of a baby carriage body interlocking with the lowering and rising operation is possible. CONSTITUTION:A hand push rod 3 is kept assembled by pulling up the internal section of the front leg rod 1 of the hand push rod 3 and fitting the locking projection of a lock mechanism 8 into the recessed hole of the front leg rod 1 for locking at the highest position. At this moment, the drive link 9 extending from the lower end section of the hand push rod 3 to the intermediate section of a rear leg rod 2 is pulled up to a horizontal position, keeping the rear leg rod 2 assembled. A pivotal rod 6 stands forward and is engaged with an arm rod 5 for holding the arm rod 5 at an assembly position. To collapse the baby carriage, the lock of a locking mechanism 8 is released by operating the collapse operation section provided in the hand push rod 3. In the next step, when the hand push rod 3 is lowered, the arm rod 5 and the drive link 9 moves in the reverse direction interlocked with each other for collapsing the baby carriage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable stroller, and more particularly to a foldable stroller in which the stroller main body is folded in the front-rear direction in conjunction with the extension / contraction operation of a hand-pushing rod, and at the same time is also folded in the width direction. It is about strollers.

[0002]

2. Description of the Related Art A foldable stroller, in particular, a foldable stroller which is configured to be folded so that a space between a front leg rod and a rear leg rod is close to each other, and also to be folded close to each other in a width direction, is disclosed in Japanese Utility Model Laid-Open No. 2-40667. It is known by the description etc.

In the stroller described above, in conjunction with the folding operation of the push rod, first, the front and rear leg rods constituting the stroller main body are brought close to each other, and then the folding operation is performed at a close distance in the width direction. Is configured as follows.

[0004]

However, in the known stroller, the folding operation for approaching in the front-rear direction and the folding operation for approaching in the width direction need to be performed separately, which is complicated. Has been pointed out.

Further, these known strollers have a structure in which the base end of a bracket attached to the lower end of the push rod is pivotally attached to the intermediate part of the rear leg rod so that the stroller can be turned upside down. Since the folding operation of the stroller is started and the bracket is configured to maintain the assembled state of the stroller when rotated upward, there is a drawback that the structure of the entire stroller becomes complicated,
When starting the folding operation, it was necessary to perform an operation such as rocking the hand-pushing rod up and down in order to promote the reversal of the bracket.

[0006]

An object of the present invention is to instantly lower the hand pushing rod (start the folding operation) or raise the hand pushing rod without performing any other operation if the stopper for securing the stop position of the hand pushing rod is released. It is intended to provide a folding stroller which has an extremely excellent operability and which is capable of performing (starting of assembling operation) and performing assembling or folding operation of the stroller main body in conjunction with the lifting operation.

Another object of the present invention is to simplify the structure of the stroller by omitting the structure such as the bracket in the known structure, and furthermore, when the reversing operation is performed, the infant's fingertip is caught in the bracket. An object of the present invention is to provide a foldable stroller configured so as to completely avoid the danger of.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a pair of front leg rods, a pair of rear leg rods pivotally attached by inserting the upper ends thereof near the upper ends of the front leg rods, and a pair of straight rods on both sides are formed on the upper part of the front leg rods. A front U-shaped push rod inserted through a hole so that it can be moved up and down, two rods are pivotally attached to form the X-shape, and both ends of each rod are opposite faces. The lower end of the hand-pushing rod and the rear leg are formed by pivoting the lower end of the hand-pushing rod at the other end, and the folding drive rod in the width direction with the other end pivotally attached to the middle part of the front-leg rod. The main feature of the invention is a folding stroller in which a folding drive link is connected to an intermediate portion of the rod.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

The folding stroller of the present invention comprises a pair of front leg rods 1, 1 and a pair of rear leg rods 2, 2 pivotally attached with their upper ends inserted near the upper ends of the front leg rods 1, 1, and the direct rods on both sides. The front leg rod 1 and the front leg rod 1 are formed into a front U-shaped hand pushing rod 3 and an X-shaped front rod rod 1, which are vertically inserted into the front leg rods 1 and 1, and whose both ends are located on opposite surfaces. And a folding drive rod 4 in the width direction pivotally attached to the intermediate portion of the.

The pair of front leg rods 1, 1 has a structure in which the upper end of a rod-shaped body is widened, and a through hole formed along the lengthwise direction in the upper half of the wide portion is used as an insertion hole 11 for a hand pushing rod. The lower half portion subsequent to this is used as the insertion support portion 12 of the rear leg rod 2. (See FIGS. 3 to 5)

The insertion support portion 12 of the rear leg rod, which is continuous with the insertion hole 11 of the push rod, is formed in a U-shaped cross section with two plates facing each other and having a hollow inside. The upper part of the rear leg rod 2 is inserted so that it can be pivotally attached.

A relatively wide vertical groove is bored along the length direction of the rear leg rod at the upper end of the rear leg rod 2, particularly below the pivotal portion with respect to the front leg rod 1. The lower half portion of the hand-pushing rod 3 which is inserted through the insertion hole 11 of the hand-pushing rod is penetrated into the groove so that it can be slid up and down. (See Figure 3)

The rear leg rod 2 has a support rod 6 of an armrest rod 5 at its tip.
Are integrally connected to each other, and the front arm rod 1 is pivotally connected to the armrest rod 5 near the boundary between the supporting rod 6 and the rear leg rod 2. (See Fig. 4)

The supporting rod 6 of the armrest rod 5 is constructed so as to be continuous with the tip of the rear leg rod 2 so as to rise and fall in conjunction with the folding operation of the rear leg rod 2. As shown in FIG. When the stroller is in the assembled state, the locking shaft 61 formed on the tip of the rear leg rod 2 automatically abuts and engages with the hook-shaped locking portion 51 formed on the lower surface of the tip of the armrest rod 5. (Fig. 7
When the stroller is in the folded state, the locking part 51
The tip end of the support rod 6 which is released from the lock is located on the lower surface of the base end of the armrest rod 5, and the armrest rod 5 is configured to fold downward while being hung down by its own weight.

The base end of the armrest rod 5 is pivotally attached to the front side of the upper end of the front leg rod 1. (See FIGS. 3 to 5)

The push rod 3 is formed so that its front surface has a U-shape or an inverted U-shape, and is a straight rod located on both sides.
Reference numerals 31 and 31 are vertically inserted into insertion holes 11 formed in the upper end of the front leg rod 1.

A folding operation portion 7 is attached to a central portion of the push rod 3. A drive lever 72, which swings when the operation lever 71 is pressed, is attached to the folding operation unit 7, and the operation wires 73, 73 are attached to the end of the drive lever 72.
The distal end of the operating wire 73 attached to the end of the drive lever 72 to which the proximal end of is attached is connected to the proximal end of the lock mechanism 8.

Both sides of the folding operation portion 7 and the hand pushing rod 3 are foldably connected by a joint structure (not shown) for folding the hand pushing rod 3 in a U-shape, and are interlocked with the lowering operation of the hand pushing rod 3. It is configured so that it can be folded in a U shape.

Since the joint structure provided in the folding operation portion 7 is widely adopted and well known in the stroller having a structure for approaching in the width direction, detailed description thereof will be omitted.

A lock mechanism 8 is attached to the lower end of the hand push rod 3. As shown in the example of FIG. 6, the lock mechanism 8 has a central portion of a locking plate 82 having a locking projection 81 formed at the tip thereof pivotally attached to the manual push rod 3 and a base end portion of the locking plate 82 provided on the manual push rod 3. Operation wire 73 extended from the folding operation section 7
Connected to

Reference numeral 84 is a spring attached to the back surface of the locking projection 81, and always applies a force to push the locking projection 81 toward the locking position.

The locking projection 81 of the lock mechanism 8 is selectively fitted and locked in the locking recess holes 13 and 13 'provided in the upper and lower portions of the front leg rod 1, respectively. Maintain the assembled state.

Reference numeral 9 denotes a drive link extending between the lower end of the hand pushing rod 3 and the middle part of the rear leg rod 2, and the rear leg rods 2 and 2 are moved to the front leg rod 1 side in conjunction with the lowering or raising of the hand pushing rod 3. The folding drive is performed by moving them close to or away from each other.

The folding drive rod 4 for moving the pair of front leg rods 1, 1 and the pair of rear leg rods 2, 2 facing each other in the width direction toward and away from each other is a long rod 41 as shown in FIG.
And the rods 42, 42 that are half the length of the rod 41 and have a short length, the front shape has an X-shape, and the rods 42, 42 that have a short length have the center of the rod 41 having a long length. The base ends of both of them are fixed via a locking shaft 44 that penetrates loosely through a through hole 43 formed in the portion, and the same function as one rod is also given. (See Figure 9)

One end of the long rod 41 is pivotally attached to the middle portion of the front leg rod 1 on one side (the front leg rod 1 located on the right side in FIG. 10), and the other end is located on the opposite side. It is pivotally attached to the lower end of the push rod 3 (the lower end of the push rod 3 located on the left side in FIG. 10).

On the other hand, the ends of the rods 42, 42 having a short length are opposite to those described above, and the rod 42 located on the left side in FIG. 10 is pivotally attached to the middle portion of the front leg rod 1 and the rod 42 located on the right side. Is pivotally attached to the lower end of the push rod 3 located on the right side.

Numeral 10 is a step plate which is extended near the lower end portions of the pair of front leg rods 1, 1 so that the central portion is pivotally mounted so that it can be folded in two and both end portions are pivotally attached to the pair of front leg rods 1, 1, respectively. And is configured to follow the folding in the width direction.

The step plate 10 is formed in a plane "F" shape with its central portion located slightly above so that it can be automatically folded in half in conjunction with the folding operation.

Numeral 14 is a supporting rod of the seat floor S, and a supporting arm rod formed inside the rear leg rod 2 is pivotally attached near its tip near the upper end of the front leg rod 1 and has the other end as a free end. It is placed on top of 15.
(See Figure 7)

The supporting rods 14 of the seat floor S are inserted into bag-shaped insertion portions S1 and S1 formed on the back surfaces of both sides of the seat floor to support the seat floor S from its rear surface, and continue to the seat floor portion S. The back support portion H has locking belts attached to both sides of the back support portion H wound around the hand push rod 3 to be locked. (See Figures 1-2)

[0032]

Operation of the Present Invention When the stroller of the present invention is in the assembled state, it is in the state shown in FIG. 1, that is, when the push rod 3 is pulled up inside the front leg rod 1 and is raised to the highest position. The locking projection 81 of the lock mechanism 8 attached to the lower end of the hand pushing rod 3 is fitted into the locking recessed hole 13 provided in the front leg rod 1 to be stopped and the assembled state is maintained.

In this case, pushing by hand, the lower end of the rod 3 and the rear leg rod 2
The drive link 9 extended to the intermediate portion of the rear is lifted to the most horizontal position to maintain the assembled state of the rear leg rod 2.

Further, in this state, the supporting rod 6 continuous with the tip of the rear leg rod 2 is erected on the front side, and is formed at the tip of the hook-like engaging portion 51 formed on the rear surface of the tip of the armrest rod 5 and the tip of the supporting rod. The locking shaft 61 is fitted and locked to accurately assemble the armrest rod 3.

When folding the stroller, the operating wire 71 is operated by operating the operating lever 71 of the folding operating section 7 attached to the central portion of the push rod 3 of the stroller in the above state.
Is pulled up, the base end of the lock mechanism 8 attached to the lower end of the hand push rod 3 is pulled up against the force of the spring 84. As a result, the locking projection 81 at the tip of the lock mechanism 8 and the front leg rod 1 are recessed. The engagement with the established recess 13 for engagement is released, and the push rod 3
Can be lowered. In this state, the hand push rod 3 is pushed down in the direction indicated by the arrow a in FIG. 3, and the locking projection 81 of the lock mechanism 8 attached to the lower end portion of the hand push rod 3 is provided at the lower end portion of the front leg rod 1 with the engaging concave hole. 13 'is fitted and stopped. Push rod 3
When the lowering operation of the folding drive link 9 is performed, one end of the folding drive link 9 pivotally attached to the lower end of the push rod 3 is also pulled down at the same time, and when the end of the folding drive link 9 is pulled down, The rear leg rod 2 to which the other end of 9 is connected is pulled in the direction shown by the arrow b in FIG. 3, and finally the rear leg rod 2 approaches the front leg rod 1 and folding in the front-back direction is performed. Be seen.

To the lower ends of the straight rods 31 and 31 of the hand push rod 3, one end of a folding drive rod 4 in which two rods are combined in an X shape is connected, and the folding drive rod 4 is connected.
Since the other ends of the two rods constituting the rod are pivotally attached near the upper portions of the pair of front leg rods 1 and 1, when the lower end of the push rod 3 descends, it extends into a relatively flat rod shape. The folding drive rod 4 in the opened state is driven so as to separate from each other in the directions indicated by arrows d and e in FIG. 10, and as a result, the pair of front leg rods 1, 1 and rear leg rods 2, 2 facing each other approach in the width direction. To be made.

At this time, the step plate 10 also moves in the same manner and is folded in two in the width direction. (See Fig. 2)

When the rear leg rod 2 is brought closer to the front leg rod 1 side, the support rod 6 of the armrest rod, which is continuous with the upper end, is moved in the direction indicated by the arrow c in FIG. The engagement with the engagement portion 51 is released, and the armrest rod 5 is folded by its own weight so as to hang down along the front leg rod 1.

Since the push rod 3 is folded by the well-known joint structure portions (not shown) provided at both ends of the folding operation portion 7 provided at the central portion, it can follow the folding operation in the width direction of the stroller.

[0040]

The effects of the present invention configured as described above are as follows.

(1) It has an excellent effect that the stroller can be instantly folded and assembled only by releasing the locked state of the hand pushing rod 3 and the front leg rod 1 and raising and lowering the hand pushing rod 3.

(2) The rear leg rods 2 are folded by a folding drive link 9 extending between the lower end of the hand push rod 3 and the middle portion of the rear leg rods 2. Since the use is eliminated, there is an excellent advantage that various troubles caused when using the bracket can be completely avoided.

(3) One end of the folding drive rod 4 pivotally attached to the central portion of the two rods is connected to the front leg rod 1 at one end.
Further, since the other end is pivotally attached to the lower end of the hand pushing rod 3, when the hand pushing rod 3 is lowered, it is driven in a direction in which the X-shaped state of the drive rod 4 is remarkably widened, and the front leg rods 1, 1 facing each other. It is possible to easily fold the 1 and the rear leg rods 2 and 2 in the width direction. In particular, this operation can be performed simultaneously with the folding operation for bringing the front and rear leg rods 1 and 2 closer to each other in the front-rear direction, and the drawbacks of the conventional structure in which these operations are performed separately can be completely eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view of a stroller showing an assembled state.

FIG. 2 is a perspective view of the stroller showing a folded state.

FIG. 3 is a side view in which a part is shown in section for showing an essential part at the time of assembly.

[Fig. 4] Side view when folded

FIG. 5 is a side view showing a locked state of a lock mechanism at a lower end of the hand push rod and a front leg rod.

FIG. 6 is an enlarged cross-sectional view of the main part in the above figure.

FIG. 7 is a perspective view showing a part of the relationship between the armrest rod and the support rod.

FIG. 8 is a perspective view showing a mounting portion of a folding drive rod.

FIG. 9 is a plan view of a folding drive rod.

FIG. 10 is a front view showing a mounting portion of a folding drive rod and a step plate.

FIG. 11 is a plan view in which a part of the folding operation unit is cut away.

[Fig. 12] Perspective view of the floor

[Explanation of symbols]

 1 Front leg rod 11 Hand push rod insertion hole 12 Rear leg rod insertion support 13 Locking hole 13 'Locking hole 14 2 Rear leg rod 3 Hand push rod 4 Folding drive rod 41 Long drive rod 42 Short drive rod 5 Armrest rod 51 Hook-like lock 6 Support rod 61 Locking shaft 7 Folding operation part 73 Operation wire 8 Lock mechanism 81 Locking projection 82 Locking plate 84 Spring 9 Drive link 10 Step plate

Claims (3)

[Claims] 1. A pair of front leg rods, a pair of rear leg rods pivotally attached by inserting upper ends thereof near the upper ends of the front leg rods, and straight rod portions on both sides can be raised and lowered to insertion holes formed in the upper part of the front leg rods. The U-shaped push rod inserted through the base, the center of two rods are pivotally attached to form an X-shape, and both ends of each rod are pushed by one end on opposite faces. The skeleton is constructed by the folding drive rods in the width direction, which are pivotally attached to the lower end of the rod, and the other end is pivotally attached to the middle part of the front leg rod located on the opposite side. A foldable stroller with a folding drive link across the middle of the leg rod. 2. The front leg rod has a structure in which an upper end portion of a rod-shaped body is widened, and a through hole formed in the upper half portion of the widened portion along the length direction is an insertion hole for a hand pushing rod, and is followed by this. The folding stroller according to claim 1, wherein the lower half portion is a hollow portion that serves as an insertion support portion of the rear leg rod. 3. A lock mechanism is attached to a lower end portion of the hand-push rod, and the lock mechanism is configured to selectively engage and lock with locking recess holes formed near the upper portion and near the lower end of the front leg rod. The foldable stroller according to claim 1.