JPS5838349B2 - baby carriage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a baby carriage, and more particularly to an improvement in the folding mechanism of a baby carriage.

BACKGROUND ART Many types of baby carriages with basic structures have been proposed and put into practical use.

Among such baby carriages, some have been proposed that have a basic chair-shaped structure.

In addition, a stroller with the basic chair-shaped structure that is foldable has also been proposed.

However, there are still some points that need to be improved in the folding baby carriage, which has a basic chair-shaped structure.

To explain in more detail, conventional products of this type do not have a sufficiently small bulk when folded.
Therefore, it is desirable to be able to reduce the height, width, and longitudinal dimensions in the folded state.

Furthermore, in the conventional stroller of this type, the front and rear wheels are not lined up at the same height in the folded state, and therefore the stroller cannot stand on its own in the folded state.

Therefore, it is desirable for such a type of baby carriage to have a structure that can stand on its own in a folded state.

Conventional strollers of this type are not always easy to fold.

Therefore, it is desirable to have a baby carriage that can be easily folded, for example, with only one hand.

To further discuss the form of the stroller in the folded state mentioned above, if the stroller is carried on the arm as a means of transportation in the folded state, the height of the stroller is sufficiently low and it can be made small into the shape of a stick. I hope so.

It is also convenient to be able to use the rolling wheels to pull the stroller when it is folded.

For transportation like this, the case must be light enough not to be a burden.

Therefore, the main object of the present invention is to provide a folding mechanism for a foldable baby carriage having a chair-shaped basic structure, which reduces the bulk of the baby carriage in the folded state and allows easy folding operation. It is to provide.

Other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention in an open state.

FIG. 2 is a top view of the baby carriage shown in FIG. 1.

FIG. 3 is a side view of the baby carriage of FIG. 1 in a closed state.

The configuration of the baby carriage shown here will be explained with reference mainly to the drawings showing the baby carriage in the open state.

A pushing member 101, which is manually operated by a person transporting and operating the baby carriage, has an inverted U-shape as a whole, and its upper part constitutes a grip part 102.

The grip portion 102 is bendable in the direction of the arrow 103 in FIG.

A portion of the push member 101 that is substantially oriented in the vertical direction constitutes a slide guide rod 104 .

A slider 105 is slidably provided on the slide guide rod 104.

The front leg 10 is attached to the slider 105 via a pivot pin 106.
The upper end of 7 is pivoted.

The left and right front legs 107, 107 are connected by a front leg connecting rod 108 for reinforcement.

The front leg connecting rod 108 can be bent in the direction of the arrow 109 in FIG.

A footrest 110 is attached using the front leg connecting rod 108, and is configured so that the feet of an infant to be placed in the stroller can be placed thereon.

A rotatable front wheel 111 is attached to the lower end of the front leg 107.

A rear leg 112 is rotatably connected to a longitudinally intermediate portion of the front leg 107 .

In this embodiment, the rear leg 112 is pivoted via a pivot pin 115 to a connector 114 that is attached to the surface of the front leg 107 by a pivot pin 113 .

A rear wheel 116 is rotatably attached to the lower end of the rear leg 112.

One end of the support angle 111 is rotatably connected via a pivot pin 118 at a longitudinally intermediate portion of the rear leg 112 .

The lower end of the push member 101 is rotatably connected to the other end of the support angle 117 via a pivot pin 119 .

As described above, the pivot pin 113 that attaches the connector 114 to the front leg 107 also rotatably connects the folding interlocking connecting rod 120.

The rear end of this folding interlocking connecting rod 120 is connected to a pivot pin 121.
It is rotatably supported by the push member 101 via.

The folding interlocking connecting rod 120 is a connecting portion 113 with the front leg 107.
A tension rod 122 is connected between this portion and the front leg connecting rod 108.

The connecting portions of the folding interlocking connecting rods 120 buttoned at both ends of the tension rod 122 and the front leg connecting rods 108 are constituted by connectors 123 and 124 in the form of universal joints.

When measuring the back of this baby carriage, there are 12 cross bars that intersect in an X shape.
5 is placed.

This cross rod 125 is a member that defines the widthwise dimension of this baby carriage together with the front leg connecting rod 108 described above.

The cross rod 125 has an upper end connected to the connector 12 in the form of a universal joint.
6 to the slider 105.

The lower end of the cross rod 125 is connected to a relatively lower portion of the rear leg 112, which is located opposite to the left and right sides of the slider 105, by a connector 127 in the form of a universal joint.

The pair of intersecting rods 125, 125 now intersect in an X-shape, and are rotatably connected to each other by the pivot pin 128.

For a baby carriage having such a basic structure, this embodiment is configured such that the folding operation proceeds by bending the grip portion 102 in the direction of the arrow 103.

Therefore, if bending of this grip portion 102 is prohibited,
The button remains open as shown in FIG. 1 and FIG. 2.

The means for performing such operations will be explained below.

FIG. 4 is a partially exploded perspective view showing the structure around the operating lever provided in connection with the push member shown in FIGS. 1 to 3. FIG.

FIG. 5 is a partially cutaway perspective view of the operating lever of FIG. 4.

FIG. 6 is a sectional view taken along the line ■--■ in FIG. 4.

A guide socket 131 is formed at the upper end of a portion of the push member 101 that corresponds to the slide guide rod 104.

For example, a slide guide rod 104 having a rectangular cross section is inserted into the guide socket 131 and fixed therein.

The grip part 102 is composed of a round pipe or nine bars, and is rotatable around its axis within the guide socket 131.

A guide elongated hole 132 is formed in the measuring surface of the guide socket 131 over a substantially perpendicular angular range, and a guide pin 133 fixed to the grip portion 102 is received here.

A bracket 134 is formed in the guide socket 131, and a through hole 135 is formed in the bracket 134.

The operating lever 136 includes a through hole 137.

When the through hole 137 and the through hole 135 are aligned, the shaft 1
39 (Figs. 1 to 3) is inserted, and the operating lever 136
is rotatably supported by the guide socket 131.

The operating lever 136 has a recess 13 on its downwardly facing surface.
8 is formed.

Therefore, when the operating lever 136 is rotated downward, the recess 138
The guide pin 133 is received inside, and the grip portion 102 is in a state in which rotation with respect to the slide guide rod 104 is prohibited.

On the other hand, when the operating lever 136 is rotated upward, the guide pin 133 escapes from the recess 138 and the guide pin 133
3 becomes movable within the guide elongated hole 132, and the grip portion 102 becomes rotatable.

Next, the folding operation and operation of this baby carriage will be explained.

When facing the open position of the stroller, the support angle 117 is
The slider 105 is rotated upward relative to the pivot pin 118 with respect to the rear leg 112, and the push member 101 is brought to a relatively upper position.
It is located relatively below 1.

In this state, a triangle is formed between the lower part of the push member 101, the upper part of the rear leg 112, and the rear part of the folding interlocking connecting rod 120, thereby establishing an open state.

To change from the open state to the closed state as described above, the operating lever 136 is rotated upward so that the grip portion 102 can be bent in the direction of the arrow 103.

Next, hold the grip portion 102 with one hand and tilt the entire baby carriage backward so that the rear wheels 116 are on the ground 11 and the front wheels 111 are lifted off the ground.

Accordingly, the weight of the baby carriage advantageously acts to cause the grip portion 102 to bend in the direction of arrow 103 and to rotate the support angle 117 in the direction of arrow 129 (FIG. 2).

When this rotation of the support angle 1170 occurs, the rear wheel 11
6 on the ground, push the push member 101 downward.

Accordingly, the slider 105 and the slide guide rod 10
4 and the pushing member 101 is brought to the lower position.

In response to this, the folding interlocking connecting rod 120 is inclined with its front end facing upward, and the front leg connecting rod 108 is accordingly bent in the direction of arrow 109 via the tension rod 122.

According to the bending of the front leg connecting rod 108, a pair of front legs 1
07 and 107 will approach each other.

At almost the same time, the slider 105 and the slide guide rod 104 are sliding, and the slider 105 moves to a position relatively above the pushing member 101, so that the pair of intersecting rods 125, 125 are rotated so that they are aligned in the vertical direction, and thereby the pair of slide guide rods 104, 104 buttons and the pair of rear legs 112, 112 move closer to each other.

Finally, as shown in FIG. 3, the front legs 107
are lined up substantially parallel to the push member 101, the rear legs 112 are also lined up substantially parallel to the push member 101, and the left and right members approach each other.

In the state shown in FIG. 3, the two front wheels 111 and the two rear wheels 116 are brought to the same height, so this baby carriage can stand on its own in the closed state.

To change the stroller from the closed state to the open state, hold the grip portion 102 of the push member 101 and float the entire baby carriage in the air.

In response to this, the weight of the baby carriage acts and the support angle 11
7 rotates downward around the pivot pin 119 at the lower end of the push member 101, and at the same time, as the slider 105 slides downward on the slide guide rod 104, the folding interlocking connecting rod 120 becomes approximately horizontal. Rotate so that

Accordingly, the front leg connecting rod 10 is connected via the tension rod 122.
8 extends left and right, and a pair of front legs 107, 10
7 are separated from each other.

Furthermore, at approximately the same time, the pair of intersecting rods 125 and 125 rotate so as to spread in the width direction while the slider 105 and the slide guide rod 104 slide.

Accordingly, a pair of slide guide rods 104, 104
The legs and the pair of rear legs 112, 112 are respectively displaced away from each other.

Towards the end of this operation, the open state shown in FIGS. 1 and 2 is established.

Here, if the operating lever 136 is rotated downward, this open state is maintained. FIG. 7 is a perspective view of another embodiment of the present invention in the open state.

Referring to FIG. 7, the same reference numerals are given to the parts corresponding to those shown in each drawing of the above-described embodiment, and only the different structures will be described below.

At the upper end of the push member 101, there are left and right slide guide rods 10.
4 is not formed, and grip portions 141 separated on the left and right sides are formed.

An operating rod 142 is provided close to the intersection of the pair of crossing rods 1 25 , 1 25 .

The operating rod 142 is rotatably connected to both the intersecting rods 125, 125, and is configured to be bendable only upward.

The bending operation of the operating rod 142 is performed via the operating grip 143.

The rest of the structure is basically the same as that of the previous embodiment, so the explanation thereof will be omitted.

In the embodiment of FIG. 7, the stroller remains open as long as the operating rod 142 is kept in a straight position.

To close this baby carriage, it is sufficient to hold the operation grip 143 with one hand and pull it upward.

In response to this, the operating rod 142 is bent upward, and the pair of intersecting rods 125, 125 are in a state where they can rotate relative to each other.

The subsequent folding operation is the same as that of the previous embodiment, so the explanation thereof will be omitted.

However, the gist of this invention is a folding mechanism for a baby carriage, and the illustration of a hammock for carrying an infant is omitted.

However, this hammock can be advantageously attached using the push member 101, the folding interlocking connecting rod 120, and the like.

As described above, according to the present invention, a relatively simple folding mechanism is realized, and therefore a baby carriage whose folding operation is easy can be obtained.

In addition, in the open state, the support angle faces upward relative to the rear legs, allowing the pushing member to be lifted to a sufficient height, while in the closed state, the support angle faces downward relative to the rear legs. This brings the push member into a lower position.

As a result, the push member secures the necessary height in the open state,
In addition, in the closed state, the push member is brought to a lower position, and the bulk in the height direction toward the closed state is reduced.

Furthermore, since each member in the closed state is brought into a state in which they are substantially parallel and close to each other, the bulk in the width direction and the front-rear direction is also sufficiently reduced.

Therefore, even when the device is carried on the arm as a means of transportation in the closed state, it can be easily transported.

Furthermore, in such a closed position, the front and rear wheels are brought to the same height, so that with the four wheels assembled, the stroller can stand on its own.

Since the front wheel button and the rear wheel are folded in the same direction, it can be transported while being pulled by utilizing the rolling of the wheels.

The folding and folding operations, i.e. the closing and opening operations, are
It can be done with one hand and in one motion.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention in an open state. FIG. 2 is a surface survey of the baby carriage shown in FIG. 1. FIG. 3 is a plan view of the baby carriage shown in FIG. 1 in a closed state. FIG. 4 is a partially exploded perspective view showing the structure around the operating lever, which can be explained in relation to the push member shown in FIGS. 1 to 3. FIG. FIG. 5 is a partially cutaway perspective view of the operating lever of FIG. 4. 6 is a sectional view taken along line VI-Vl in FIG. 4. FIG. FIG. 7 is a perspective view of another embodiment of the invention in an open state. In the figure, 101 is a push member, 104 is a slide guide rod, 105 is a slider, 106, 113, 115, 11
8, 119, 121 are pivot pins, 107 is a front leg, 108
is the front leg connecting rod, 112 is the rear leg, 111 is the support angle,
120 is a folding interlocking connecting rod, 122 is a tension rod, 125 is a cross rod as a width direction regulating member, 1 26 , 1 27
is a connector in the form of a universal joint.

Claims (1)

[Scope of Claims] 1. A pushing member including a pair of slide guide rods extending substantially in the vertical direction; a pair of sliders sliding on each of the slide guide rods; and a rotating upper end of each slider. a pair of front legs that are freely connected; a pair of rear legs that are rotatably connected to a longitudinally intermediate portion of each of the front legs; and one end of each of the rear legs that is rotatably connected to a longitudinally intermediate portion of each of the rear legs; a pair of support angles which are rotatably connected to each other and whose other ends are rotatably connected to the lower ends of each of the push members; are rotatably connected, a relatively front portion thereof is rotatably connected to a longitudinally intermediate portion of each of the front legs, and a portion further extends forward from the connecting portion with each of the front legs. and a folding interlocking connecting rod, the upper end 75 of which is rotatably connected to each of the sliders in a universal joint manner, and the lower end thereof is rotatable in a universal joint manner to a relatively lower portion of each of the rear legs, the lower end of which is located opposite to the left and right. Freely connected
a pair of intersecting rods intersecting in a letter-like shape; a front leg connecting rod bendably connected to a relatively lower portion between the pair of front legs; and the front leg connecting rod and at least one of the folding interlocking connecting rods. a tension rod connected between the front end of the stroller, and when the baby carriage is in an open state, the support angle is rotated upward relative to the rear legs, and the push member is brought to a relatively upper position. When the baby carriage is in a closed state, the support angle is rotated downward relative to the rear legs, and the push member is brought to a position relatively below the push member. The slider is brought to a relatively lower position, and the slider slides along the slide guide rod, and is brought to a relatively upper position of the pushing member, and the pair of intersecting rods extend in a vertically aligned manner. As a result, the pair of slide guide rods and the pair of rear legs approach each other, and the folding interlocking connecting rod tilts with its front end facing upward, thereby causing the A baby carriage in which the front leg connecting rod is bent through a rod and the pair of front legs are brought closer to each other. 2. The baby carriage according to claim 1, further comprising means for fixing the angle of the pair of intersecting rods in order to fix the open state of the baby carriage. 3. The baby carriage according to claim 1, wherein the push member includes a grip portion bendably connected between upper ends of the pair of slide guide rods. 4. Claim 3, wherein means for prohibiting bending of the grip portion is provided in order to fix the open state of the baby carriage.
Baby carriage as described in section.