JPS6340063Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mechanism for determining the width of the push rod of a baby carriage.

FIG. 1 shows the prior art of interest to this invention and corresponds to the open position of the baby carriage. Figure 2 shows
This is a diagram corresponding to FIG. 1, and corresponds to the closed state of the baby carriage. In FIGS. 1 and 2, parallel bars extending vertically are a pair of push bars 1 provided on the baby carriage.
01 is shown. The distance between the pair of push rods 101, that is, the width thereof, is changed according to the opening/closing operation of the baby carriage. As a mechanism for determining such a width, a connecting means is made of a combination of a pair of cross connecting rods 103 and a pair of short connecting rods 104, which are pivotally supported by a pivot pin 102 in a state where they intersect with each other. is used. In this connection means, a pair of cross connection rods 103 have, at one end of each,
Each one end of the pair of short connecting rods 104 is rotatably connected to the pair of push rods 101 via a pivot pin 105, and is connected at the other end to the pair of short connecting rods 104 via a pivot pin 106. is rotatably connected to. The other ends of the pair of short connecting rods 104 are rotatably connected to the pair of push rods 101 via pivot pins 107 .

Although FIG. 1 corresponds to the open state of the baby carriage, if the pair of cross connecting rods 103 are prohibited from rotating relative to each other in this state, the pair of push rods 101
The width of will be determined. For this purpose, the transverse connecting rods 108 are connected to a pair of cross connecting rods 103.
connected between. The horizontal connecting rod 108 is configured to be bendable at its center, but is configured with a suitable lock so that it can maintain its straight state.

Therefore, in the state shown in FIG.
8 is locked to maintain its straight state, thereby fixing the mutual angle of the pair of cross connecting rods 103, and determining the width between the pair of push rods 101 accordingly. When the lock that maintains the straight line state of the horizontal connecting rods 108 is released, the mutual angle of the pair of cross connecting rods 103 can be changed, and the second
As shown in the figure, the width between the pair of push rods 101 is narrowed.

In such a width determining mechanism for the push rods 101 of the baby carriage, in order to determine the width between the pair of push rods 101 when the baby carriage is in the open state, a pair of intersecting connecting rods 103 is used.
The mutual angles of the two must be fixed, which is why the horizontal connecting rod 108 is provided.
However, as shown in FIG. 1 and FIG.
It must be placed in a relatively limited space between 03 and 03. This not only complicates the work of attaching the horizontal connecting rod 108 to the cross connecting rod 103, but also makes it difficult to operate the horizontal connecting rod 108 provided at such a position when opening and closing the baby carriage. It is not necessarily an easy place to operate.

Therefore, the horizontal connecting rod 108 is further shifted upward from the position shown in the drawing, and the pair of cross connecting rods 1
03 may be connected, but in this case, the following drawbacks arise. That is, some baby carriages include a hammock with a reclining backrest. When such a hammock is reclined, its backrest is often fitted with a pair of push rods 101.
It enters into the space formed between them. Therefore, it is desirable that a free space as large as possible be formed between the pair of push rods 101. Therefore, even though even the presence of the cross connecting rod 103 would result in a narrowing of the above-mentioned free space, if in addition to this the cross connecting rod 108 were to be moved further upwards than the position shown, such This is undesirable as it further narrows the free space.

Therefore, the purpose of this invention is to facilitate the operation to open and close the stroller, and to create a relatively large free space between the pair of push rods, which is necessary for reclining the hammock. , To provide a width determining mechanism for a push rod of a baby carriage.

In this invention, in order to achieve the above-mentioned objective, firstly, the horizontal connecting rods are arranged at different positions from the cross connecting rods. That is, this invention has a first connecting means connected between relatively upper portions of a pair of push rods, and a first connecting means connected between relatively lower portions of a pair of push rods, which are pivoted at an intersection in a state where they intersect with each other. Ta1
and second connecting means consisting of a combination of a pair of cross connecting rods and a pair of short connecting rods. The first connecting means includes a horizontal connecting rod that can be bent only in one direction at the center and is rotatably connected to a pair of push rods at both ends, and prohibits bending of this horizontal connecting rod in the other direction. It includes stoppa. Further, the pair of cross connecting rods are rotatably connected to the pair of push rods at their respective upper ends;
and each lower end is rotatably connected to one end of the pair of short connecting rods, and the other end of each of the pair of short connecting rods is rotatably connected to the pair of push rods. Ru. In addition, a rotation range of the cross connection rod and the short connection rod is defined at the connection portion between each cross connection rod and each short connection rod, and at the end of this rotation range, one pair corresponds to the open state of the stroller. A stop wall is formed that determines the width of the push rod. Furthermore, a portion of each of the pair of cross-connecting rods located above the intersection is given a curved shape such that its center of curvature is located in a region sandwiched between the pair of cross-connecting rods. There is.

As described above, according to this invention, first, the horizontal connecting rod is positioned relatively above the pair of push rods, and the horizontal connecting rod is positioned within reach of the operator in a standing position. be able to. Therefore, the transverse connecting rod itself and the associated stopper can be easily manipulated.

Also, according to this invention, one pair of short connecting rods is one
A second connecting means is connected to the lower ends of the pair of cross connecting rods and is composed of a combination of the pair of cross connecting rods and the pair of short connecting rods.
The portion of each of the pair of cross-connecting rods located relatively below the pair of push rods and located above the intersection has a center of curvature sandwiched between the pair of cross-connecting rods. A curved shape is provided to locate the area. Therefore, when the backrest of the hammock is reclined, it fits between the first connecting means and the second connecting means, and due to the above-mentioned curvature, it is formed above the intersection of the pair of intersecting connecting rods. The presence of the cross connecting rod prevents the degree of reclining of the backrest from being limited, and allows the backrest to be reclined to a relatively large degree. .

Further, according to this invention, when the baby carriage is in the open state, the end of the rotation range of the cross connecting rod and the short connecting rod is defined by the stop wall, so that
The width of the pair of push bars is determined definitively.

In a preferred embodiment of the invention, the stopper is
This prohibits bending of the horizontal connecting rod in a state where it is slightly bent in the opposite direction to the bending direction of the horizontal connecting rod. This is realized by a member that abuts a part of the side.

Hereinafter, this invention will be explained in connection with its embodiments with reference to the drawings.

FIG. 3 is a perspective view of a baby carriage in an open state in which an embodiment of this invention is adopted. FIG. 4 is a right side view of the baby carriage shown in FIG. 1 in a closed state. Fifth
The figure is a perspective view showing the main parts of the same baby carriage from diagonally rearward, and shows a state in the middle of transition from an open state to a closed state.

Before specifically explaining the push rod width determining mechanism as an embodiment of this invention, first, the overall structure of the baby carriage will be explained.

A grip portion 1 for manually pushing the baby carriage by a person transporting and operating the baby carriage is provided at the upper end of a pair of push bars 2. A width determining mechanism, which is a feature of this invention, is attached to the pair of push rods 2. The upper ends of the pair of push rods 2 are connected by a horizontal connecting rod 3 that can be bent only downward. This constitutes part of the width determining mechanism. In the middle part of each push rod 2,
A handrail 5 is rotatably connected via a pivot pin 4. The pivot pin 4 also functions to rotatably support a pair of backrest holding rods 6 that hold the backrest of a hammock (not shown) attached to the baby carriage. The upper ends of the pair of backrest holding rods 6 are connected at the center by a bendable backrest connecting rod 7 so as to project forward. The backrest connecting rod 7 is configured to bend forward as described above when the pair of backrest holding rods 6 approach each other.
As described above, the backrest holding rod 6 is rotatably supported by the pivot pin 4, thereby allowing the backrest portion of the hammock to recline. A reclining adjustment fitting 8 is provided connected between the push rod 2 and the backrest holding rod 6 in order to fix some postures of the reclining backrest portion. A description of the configuration and operation of the reclining adjustment fitting 8 will be omitted. A pair of cross connecting rods 9 and a pair of short connecting rods 10 that intersect with each other are connected to relatively lower portions of the pair of push rods 2 . In the width determining mechanism that is a feature of this invention, when the aforementioned horizontal connecting rods 3 constitute the first connecting means, the combination of the pair of cross connecting rods 9 and the pair of short connecting rods 10 is as follows: This constitutes a second connecting means. Details of these first and second connecting means will be described later with reference to FIGS. 6 to 9.

One end of the support plate 12 is connected via a pivot pin 11 at a point separated by a predetermined distance from the lower end of each push rod 2, and the other end of the support plate 12 is connected to a pivot point at the middle of the rear leg 13. They are rotatably connected via a locking pin 14. A locking device 15 is provided near the support plate 12 for locking the baby carriage in the open state, and when the locking device 15 engages with the pivot locking pin 14, the stroller is locked. is realized.

A front leg 17 is rotatably attached to a relatively forward portion of the handrail 5 via a pivot pin 16. Near the upper end of each front leg 17 is a bracket 18.
is attached, and the upper end of the aforementioned rear leg 13 is rotatably connected by a pivot pin 19 passing through this bracket 18. At the lower end of the pair of rear legs 13,
A rear wheel 20 is provided, and a front wheel 21 is provided at the lower end of the pair of front legs 17. The front ends of front and rear connecting rods 23 are rotatably attached to a relatively upper portion of each front leg 17 via pivot pins 22, and the rear ends of front and rear connecting rods 23 are connected to the aforementioned pivot pins 11. It is rotatably connected to the push rod 2 and the support plate 12.

The pair of front and rear connecting rods 23 includes a pair of long cross connecting rods 24 that intersect with each other and are arranged on the lower side thereof.
and a pair of short connecting rods 25 that are connected to each other at their inner ends. Long cross connecting rod 2
4, when the pair of front and rear connecting rods 23 approach each other, they rotate so as to elongate in the front and rear direction, and at this time, the pair of short connecting rods 25 are bent so that their connecting portions protrude forward. .

A front leg connecting rod 27 is connected between the relatively lower ends of the pair of front legs 17 via a bracket 26. The front leg connecting rod 27 is bendable at its center, and the direction of bending is selected so that it can be bent only in the direction in which this center portion is displaced downward. In order to control such a bending operation of the front leg connecting rod 27, the front leg connecting rod 27 is
near the center of and the pivot pin 22 of the front and rear connecting rod 27
A tension rod 28 is connected to a point further rearward. The connecting portions at each end of the tension rod 28 to the front leg connecting rod 27 and the front and rear connecting rods 23 are as follows:
It is assumed to be a universal joint type.

A trunk guard 29 is connected between the front ends of the pair of handrails 5. This torso guard 29 is for protecting the torso of an infant placed in this baby carriage. That is, the seat of the hammock on which the infant is placed is formed on the aforementioned front and rear connecting rods 23, long cross connecting rods 24, and short connecting rods 25, and there is a torso section in front of the torso of the infant sitting here. Guard 29
is located. For this purpose, the torso guard 29 is constructed from a material that is at least superficially flexible. The torso guard 29 is configured to be bendable,
As the pair of handrails 5 approach each other, their central portions are bent so as to protrude forward.

Figure 6 shows the push rod 2, horizontal connecting rod 3, and cross connecting rod 9.
And the connection mode of the short connecting rod 10 is shown from the rear of the baby carriage, and corresponds to the open state of the baby carriage. Figure 7 shows
This is a diagram corresponding to FIG. 6, and corresponds to the closed state of the baby carriage. Figure 8 shows the cross connecting rod 9 and the short connecting rod 1.
0 is shown in an enlarged manner, and corresponds to the state shown in FIG. FIG. 9 is a diagram corresponding to FIG. 8, and corresponds to the state of FIG. 7.

The horizontal connecting rod 3 consists of a left portion 3a and a right portion 3b, both of which are rotatably connected to each other by a pivot pin 56. Also, for each push rod 2,
Each end of the horizontal connecting rod 3 is rotatably connected by a pivot pin 57. In the open state shown in FIG. 6, the left portion 3a and right portion 3b of the horizontal connecting rod 3 are
It is kept slightly bent upward. That is, the central pivot pin 56 is located above the straight line connecting the left and right pivot pins 57. However, the horizontal connecting rod 3 cannot be bent upward any further. This is because the left portion 3a is provided with a stopper 58 that comes into contact with the top surface of the end of the right portion 3b. However, as shown in FIG. 7, the horizontal connecting rod 3 is free to bend downward. During this downward bending process, the horizontal connecting rod 3 changes from a slightly upwardly bent state to a straight line state and then to a downwardly bent state. In this way, when the baby carriage is in the open state, the horizontal connecting rod 3
The reason why the push rods 2 are kept bent in the opposite direction to their original bending direction is to enable the stopper 58 to advantageously absorb the force that causes the pair of push rods 2 to approach each other. It is. Here, a bending inhibiting means for the first connecting means is realized.

In connection with this bending prohibition means, in order to prevent the horizontal connecting rod 3 from inadvertently bending downward when the baby carriage is in the open state, the left portion 3
A concave portion may be provided on one side of each surface where a and the right portion 3b come into contact with each other, and a protrusion that fits into this concave portion may be provided on the other side. This combination of the recess and the protrusion allows the horizontal connecting rod 3 to be configured not to bend downward unless a certain degree of downward force is applied.

The pair of cross connecting rods 9 are rotatably connected to each other by a pivot pin 59. The upper end of each cross connecting rod 9 is connected to each push rod 2 via a pivot pin 60.
is rotatably connected to. The lower end of each cross connecting rod 9 is rotatably connected to each short connecting rod 10 via a pivot pin 61. A bracket 30 is formed at the lower end of the push rod 2. As clearly shown in FIG. 5, the aforementioned locking tool 15 is held on the side surface of this bracket 30, and the other side of the short connecting rod 10 is held on the rear surface of the bracket 30 via a pivot pin 42. The ends of the two are rotatably connected.

The short connecting rod 10 is shaped to receive the lower end of the cross connecting rod 9. As best shown in FIGS. 8 and 9, the short connecting rod 10 has a stop wall 62 that defines the range of rotation of the cross connecting rod 9 about the pivot pin 61 with respect to the short connecting rod 10. is formed. This stop wall 62 abuts against the side surface of the cross connecting rod 9 when the baby carriage is in the open state,
An angular widening between the cross connecting rods 9 and the short connecting rods 10 is prohibited. However, when changing from the open state to the closed state, rotation of the cross connecting rod 9 and the short connecting rod 10 about the pivot pin 61 is not prevented.

In addition, in the portion of each of the pair of cross connecting rods 9 located above the intersection where the pivot pin 59 passes, the center of curvature is located in the area sandwiched between the pair of cross connecting rods 9. A curved shape is provided for positioning. By adopting such a shape, for example, in the state shown in FIG. 6, the space formed between the pair of cross-connecting rods 9 and above the pivot pin 59 is such that the cross-connecting rods extend linearly. It can be larger than if it were. This space is the space in which the backrest of the aforementioned hammock is located, and therefore, a larger space means that a greater degree of reclining of the backrest can be achieved.

In the configuration shown in FIGS. 6 and 7, the width of the pair of push rods 2 is reliably determined in the open state of the baby carriage. That is, a pair of cross connecting rods 9 and 1
The pair of short connecting rods 10 prevents the pair of push rods 2 from widening, and the horizontal connecting rod 3 prevents both the width of the pair of push rods 2 from widening and narrowing. , the width of the pair of push rods 2 is definitely determined.

Next, the opening/closing operation and operation of the baby carriage described above will be explained. In the open state of the baby carriage, the push rod 2 is aligned with the support plate 12 and locked by a locking mechanism including a locking device 15.

To change from such an open state to a closed state, it is first necessary to operate the locking tool 15 to release the lock. Next, the horizontal connecting rod 3 is bent downward and the upper end of the push rod 2 is pushed forward. Accordingly, the lower end of the push rod 2 separates from the rear leg 13 rearward. In response, the front and rear connecting rods 3 pull the front legs 17 rearward. This state is shown in FIG.

Along with the above-mentioned operation, the widthwise dimension of the baby carriage is also shrinking. That is, as the horizontal connecting rod 3 is bent, the distance between the pair of push rods 2 is narrowed, and accordingly, the cross connecting rod 9 and the short connecting rod 10 are also rotated to narrow the width of the pair of push rods 2. It's moving.
Also, depending on the narrowing of the distance between the pair of push rods 2, 1
The distance between the pair of backrest holding rods 6 also narrows, and the backrest holding rod 7 also becomes bent. Furthermore, a pair of handrails 5
The interval between the two becomes narrower, and the torso guard 29 also becomes bent.
Further, as the distance between the pair of front and rear connecting rods 23 narrows, the long cross connecting rod 24 and the short connecting rod 25 rotate.

When the folding operation further progresses and the support plate 12 is rotated to the extent that it is turned upside down, the rear part of the front and rear connecting rods 23 is tilted downward, and this operation is extended to the front legs via the tension rod 28. The force is transmitted to the connecting rod 27, the front leg connecting rod 27 is also bent downward, and the distance between the pair of front legs 17 is also narrowed. As this operation progresses, a closed state as shown in FIG. 4 is finally obtained. In this state,
Since the two front wheels 21 and the two rear wheels 20 are brought to approximately the same height, this baby carriage can stand on its own in the closed state.

To change from the closed state to the open state, first, for example, hold the central portion of the horizontal connecting rod 3 with your hand and lift the entire baby carriage in the air. In response to this, the weight of the baby carriage acts, and the support plate 12 moves against the pivot locking pin 1.
Rotates around 4. At the same time, the handrail 5 and the front and rear connecting rods 23 are also rotated in the direction to become horizontal. The rotation of the support plate 12 described above,
The rotation of the front and rear connecting rods 23 causes the front legs 17 to rotate in a direction away from the rear legs 13.

At the same time, the widthwise dimension of the baby carriage has also been widened. That is, the horizontal connecting rod 3, as described above,
Since my hand is placed on the center of the pram and the entire pram is suspended in the air, the pram's own weight is acting on it and trying to keep it in a straight line. Therefore, the width of the pair of push rods 2 is increased, and the cross connecting rods 9 and the short connecting rods 10 are rotated accordingly. Furthermore, the distance between the pair of handrails 5 has been widened, and the body guard 29 is also about to extend in a straight line. Furthermore, a pair of front and rear connecting rods 23
The distance between them has also been widened, and the long cross connecting rods 24 and short connecting rods 25 have rotated accordingly. moreover,
In the process of the front and rear connecting rods 23 becoming horizontal, the tension rods 28 pull up the front leg connecting rods 27, making the front leg connecting rods 27 straight, and the distance between the pair of front legs 17 is also widened. Then, in the final stage of the operation to this open state, the pivot locking pin 14
engages with the locking tool 15, and a locked state is obtained.

As mentioned above, the embodiments of this invention have been described in detail, but the invention is not limited to these embodiments in implementing the invention. This will be discussed below.

First, the baby carriage to which this invention is applied may be one in which the width of a pair of push rods is changed at least in its opening/closing operation.

Further, the horizontal connecting rod 3 serving as the first connecting means is configured to be bendable only downward. This has the advantage that when the baby carriage is in the closed state, the bent horizontal connecting rod 3 is stored without protruding from the baby carriage in the closed state. However, if such an advantage is not desired, or if such a transverse coupling rod is provided in a further downward position, this transverse coupling rod may be configured to be bendable only upwardly.

[Brief explanation of the drawing]

FIG. 1 shows the prior art of interest to this invention and corresponds to the open position of the baby carriage. Figure 2 shows
This is a diagram corresponding to FIG. 1, and corresponds to the closed state of the baby carriage. FIG. 3 is a perspective view of a baby carriage in an open state in which an embodiment of this invention is adopted. FIG. 4 is a right side view of the baby carriage shown in FIG. 3 in a closed state. FIG. 5 is a perspective view showing essential parts of the baby carriage shown in FIGS. 3 and 4, and showing a state in the middle of changing from an open state to a closed state. FIG. 6 shows how the push rod 2, horizontal connecting rod 3, cross connecting rod 9 and short connecting rod 10 are connected from the rear of the baby carriage, and corresponds to the open state of the baby carriage. FIG. 7 is a diagram corresponding to FIG. 6, and corresponds to the closed state of the baby carriage. FIG. 8 shows an enlarged view of the connecting portion between the cross connecting rod 9 and the short connecting rod 10, and corresponds to the state shown in FIG. 6. Figure 9 shows
This figure corresponds to FIG. 8 and corresponds to the state of FIG. 7. In the figure, 2 is a push rod, 3 is a horizontal connecting rod, 9 is a cross connecting rod, 10 is a short connecting rod, 42, 56, 57,
59, 60, 61 are pivot pins, 58 is a stopper,
62 is a stop wall.

Claims (1)

[Claims for Utility Model Registration] (1) A mechanism for determining the width of a pair of push bars in an open state of a baby carriage in which the width of a pair of push bars is changed in response to an opening/closing operation, comprising: a comparison of the pair of push bars; a first connecting means connected between the target parts; a pair of cross connecting rods connected between relatively lower portions of the pair of push rods and pivoted at intersections in a state of crossing each other; and a second connecting means consisting of a combination of short connecting rods, the first connecting means being bendable in only one direction at the center and rotatably connected to the pair of push rods at both ends. and a stopper that prohibits bending of the horizontal connecting rod in the other direction, and the pair of cross connecting rods are rotatably connected to the pair of push rods at their respective upper ends. , and each lower end is rotatably connected to one end of each of the pair of short connecting rods, and the other end of each of the pair of short connecting rods is rotatably connected to the pair of push rods. A rotation range of the cross connection rod and the short connection rod is defined in the connection portion between each of the cross connection rods and each of the short connection rods, and an end of this rotation range corresponds to an open state of the baby carriage. A stop wall is formed to determine the width of the pair of push rods, and further, a stop wall is formed in a portion of each of the pair of cross connecting rods located above the intersection point so that the center of curvature thereof is aligned with the width of the pair of cross connecting rods. A width determining mechanism for a push rod of a baby carriage, which is given a curved shape to be positioned in an area sandwiched between the two. (2) The stopper prohibits bending of the horizontal connecting rod in a state where the horizontal connecting rod is slightly bent in the opposite direction to the direction in which the horizontal connecting rod can be bent.
A width determining mechanism for a push rod of a baby carriage as set forth in claim 1 of the utility model registration claim. (3) The baby carriage according to claim 2, wherein the stopper is a member that is formed on one side of the horizontal connecting rod divided at the bending point and abuts a part of the other side. Push rod width determining mechanism. (4) The stop wall is provided on the short connecting rod side.
A width determining mechanism for a push rod of a baby carriage according to any one of paragraphs.