JPH0353973Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a mechanism for locking a folding baby carriage in the open position.

Background of the invention FIGS. 7 and 8 show an example of a folding baby carriage to which this invention is applied, and the form seen from the side is represented by a line diagram. In FIG. 1 showing the baby carriage in an open state, 1 is the front leg as the first leg, 2 is the rear leg as the second leg,
One pair of front legs 1 and one pair of rear legs 2 are provided. A schematically illustrated front wheel 3 is rotatably mounted on the lower end of the front leg 1, and a rear wheel 4 is similarly mounted on the lower end of the rear leg 2. A seat (not shown) is positioned extending between the front legs 1 and the rear legs 2, on each side of which a side frame 5 is positioned. Each side frame 5 extends between each front leg 1 and the corresponding rear leg 2.

As shown in FIG. 8, the side frame 5 itself is configured to be foldable within each side of the baby carriage. Therefore, when the side frame 5 assumes the extended state, each of the front legs 1 and the corresponding rear legs 2 move away from each other, realizing the open state of the baby carriage as shown in FIG. On the other hand, when the side frame 5 assumes the folded state, each of the front legs 1 and the corresponding rear legs 2 approach each other, realizing the closed state of the baby carriage as shown in FIG.

In FIGS. 7 and 8, the side frame 5 is constituted by two side bar members 6, 7 which are themselves bendable. These side rod members 6, 7 are rotatably connected at both ends thereof to each of the front legs 1 and the rear legs 2 on the corresponding side.

Note that the push rod 8 for pushing this baby carriage is the seventh
As shown by dotted lines in the figures and FIG. 8, it may be provided, for example, in a state where it is mechanically fixed to the rear leg 2.

As described above, according to the baby carriage shown in FIGS. 7 and 8, the side frame 5 is configured to be bendable, so the side frame is made long in the front and rear direction, and the front wheels 3 and rear wheels 4 are Even if the wheelbase of the stroller is lengthened to stabilize the stroller and the seat is enlarged, the framework of the stroller can be closed compactly.

For other examples of baby carriages with similar advantages,
This will be explained with reference to FIGS. 9 and 10.

This baby carriage is basically the same as the baby carriage described above in that it is provided with front legs 1, rear legs 2, and a side frame 5 that can be folded itself. The side frame 5 in the baby carriage shown in FIGS. 9 and 10 is
It includes an upper side bar member 16 and a lower side bar member 17 which are arranged vertically and are bendable themselves. The upper side rod member 16 is rotatably connected to the front leg 1 and the rear leg 2 with both ends thereof projecting from the front leg 1 and the corresponding rear leg 2. Upper end portions of tension rods 18 and 19 are rotatably connected to the end portions of the respective projecting portions of the upper side rod member 16, respectively. A reversing rod 2 is provided at the lower end of each tension rod 18, 19.
0 and 21 are rotatably connected, and the other end of each reversing rod 20 and 21 is connected to the front leg 1 or the rear leg 2.
is rotatably connected to. The lower side rod member 17 is
Both ends are rotatably connected to the one end of each reversing rod 20, 21, respectively.

Furthermore, an upper side rod member 16 and a lower side rod member 17
Interlocking links 22a and 22b are provided to connect the two to each other. As a result, the bending and stretching movements of the upper side rod member 16 and the lower side rod member 17 are interlocked with each other.

Problems to be Solved by the Invention As can be seen by comparing the open and closed states of the two types of baby carriages described above, when bending of the side frame 5 is prohibited,
The baby carriage is locked in the open position. In order to achieve such a lock, it is conceivable, for example, to provide means for keeping the distance between the front leg 1 and the rear leg 2 on the corresponding side wide. This thing,
Regarding the baby carriage shown in FIGS. 9 and 10,
This will be explained with reference to FIGS. 11 and 12.

A lock rod 23 is provided which is rotatably connected to at least one of the front legs 1 and the rear leg 2 on the corresponding side. The locking rod 23 is itself bendable and is configured such that bending is selectively prohibited. Therefore, the structure can be such that the closed state shown in FIG. 12 cannot be obtained unless the locking rod 23 is bent. A similar locking bar can also be applied to the baby carriage shown in FIGS. 7 and 8.

By the way, in order to use such a lock bar 23 to bring a baby carriage that has been locked from the open position into a closed state, the lock bar 23 must first be brought into a bendable state. Then, as shown in FIG. 12, a closed state of the baby carriage is obtained in which the locking rod 23 as well as the upper side rod member 16 and the lower side rod member 17 are bent.

When considering the operation of such a baby carriage from the open state to the closed state, even if the lock bar 23 is made bendable, in order to actually bend it, at an initial stage, Lock rod 2
It is conceivable that the bending must be oriented by operating against 3. Otherwise, even if the locking rod 23 is in a bendable state, even if the front legs 1 and the rear legs 2 try to approach each other,
It may end up continuing to act as a bridge between the two.

Therefore, in this invention, when an operation is performed on a lock rod that is in a state where bending is prohibited, and an operation is performed to make it possible to bend, the lock rod is also slightly bent, and the subsequent It is an attempt to provide a mechanism that allows orientation for bending.

Means for solving the problem This invention first consists of a pair of first legs and a pair of second legs.
and a pair of side frames each extending between each of the first legs and a second leg on the corresponding side, each side frame being configured to be foldable within each side of the stroller. , whereby when the side frame assumes the extended state, each of the first legs and the corresponding second leg
The legs move away from each other to realize the open state of the stroller, and on the other hand, when the side frame assumes the folded state, each of the first legs and the corresponding second leg approach each other to realize the closed state of the stroller. This is applied to such a baby carriage that achieves this. As a mechanism to lock the open state of such a baby carriage,
By employing the following configuration, the above-mentioned technical problem is solved.

That is, at least one of the second legs is provided with a bracket that projects toward the first leg on the corresponding side. A locking rod, which is itself bendable, is rotatably connected at both ends between the bracket and the corresponding first leg.

Further, the second leg is provided with a fixed posture regulating surface and a slider capable of sliding, which sandwich the locking rod while contacting each side of the locking rod in an extended state, and the slider moves in a direction approaching the posture regulating surface. is always biased by a spring.

Further, a lock release engaging portion is formed extending from the slider and aligned on one side of the lock rod and on the same side as the posture regulating surface.

Furthermore, the slider is provided with an operating lever that, when rotated, abuts against the bracket and slides the slider itself in a direction away from the posture regulating surface, thereby causing the lock release engaging portion to engage with the lock rod. It is then moved in the direction of bending it.

Function: When the stroller is in the open state, the locking rod is held between the fixed posture regulating surface placed on the second leg and the slider biased by a spring in the direction toward the fixed posture regulating surface, and its extension is kept in good condition. In other words, the lock rod is in a state where bending is prohibited.

In order to make such a lock rod bendable, an operating lever is rotated. As a result, the slider slides in a direction away from the posture regulating surface, first releasing the lock rod from being clamped, and the lock rod becomes in a bendable state. Furthermore, what should be noted is that as the slider slides, the lock release engaging part moves while being engaged with the lock rod, so the lock bar moves as the lock release engaging part moves. It will be bent. Therefore, in the subsequent folding operation of the baby carriage, the locking bar is oriented with respect to the folding, so that it can be easily folded as it is.

Embodiment FIGS. 1 and 2 show the frame structure of a baby carriage in an open state and a closed state, respectively, in which an embodiment of the present invention is adopted. This baby carriage is common to the baby carriage shown in FIGS. 11 and 12 in the manner of link connection, and includes all the elements shown in FIGS. 11 and 12. Therefore, similar reference numerals will be used for common parts. The following explanation is
Unless otherwise specified, the tests are performed with the stroller in the open position.

The front legs 1 and the rear legs 2 are opened in an inverted V-shape, and a front wheel 3 and a rear leg 4 are rotatably attached to the lower ends of each. especially,,
Preferably, the front wheel 3 is attached to the front leg 1 via a caster 24.

The upper side rod member 16 has a bending point 25 at its center.
have. At positions separated by a predetermined distance on both sides of this bending point 25, the upper ends of the front leg 1 and the rear leg 2 are rotatably connected to the upper side bar member 16 via pivot points 26 and 27.

Interlocking links 22a, 22 are provided at the portions of the upper side rod member 16 that further protrude from the pivot points 26, 27.
The upper end portions of b are rotatably connected via pivot points 28 and 29. Furthermore, these pivot points 26 and 28
The positional relationship between 27 and 29 is opposite to that of the baby carriage shown in FIG.

The upper ends of tension rods 18 and 19 are rotatably connected to both ends of the upper side rod member 16 via pivot points 30 and 31, respectively.

At the lower ends of the tension rods 18 and 19, an inversion rod 20,
One end of 21 is rotatably connected via pivot points 32 and 33. The other ends of the reversing rods 20 and 21 are rotatably connected to the front leg 1 or the rear leg 2 via pivot points 34 and 35.

The lower side bar member 17 has a bending point 36 at its center.
has. At a position separated by a predetermined distance on both sides of this bending point 36, the interlocking links 22a,
A lower end portion of 22b is rotatably connected to the lower side rod member 17 via pivot points 37 and 38.

Both ends of the lower side rod member 17 are connected to the aforementioned pivot point 3 at one end of each reversing rod 20, 21, respectively.
It is rotatably connected to the reversing rods 20, 21 and the tension rods 18, 19 via 2, 33, respectively.

The locking rod 23 has a bending point 39 in its center. In addition, a bracket 42 is placed on the rear leg 2.
is fixed, and this bracket 42 projects from the rear leg 2 toward the front leg 1 on the corresponding side. The locking rod 23 has a pivot point 40 on the front leg 1.
The front legs 1 and the rear legs 2 are rotatably connected to the front legs 1 and the rear legs 2 via pivot points 41 on the brackets 42 and 42, respectively. A lock bar like this 23
It is sufficient that the front legs 1 are provided to connect the front legs 1 on one side and the hind legs 2 on the corresponding side. Thus, two locking bars 23 may be provided. The locking rod 23 and bracket 42 and their related structures will be explained later with reference to FIGS. 3 through 6.

A footrest 43 is shown below the lower side bar member 17. This footrest 43 has hanging links 44,
It is held in a suspended state from the lower side rod member 17 via 45. The suspension links 44 and 45 are rotatably connected to the footrest 43 via pivot points 46 and 47, and are rotatably connected to the lower side bar member 17 via pivot points 48 and 49. movably connected. Note that in the baby carriage shown in FIGS. 1 and 2, although not shown, the upper side bar member 16 and the lower side bar member 17 are set to such an extent that two seats facing each other can be attached. length is selected. The seating surfaces of these seats are provided along both sides through the bending point 36 of the lower side bar member 17. Therefore, the aforementioned footrest 43 functions to place the feet of an infant seated on any of these seats. Of course, these two seats may be used to seat two infants.

In the open state of the baby carriage shown in Figure 1,
The lower end of each tension rod 18, 19 is in contact with the front leg 1 or the rear leg 2. This state is not necessarily the first
Although it is not clear from the figure, the pivot point 3 of the lower end portions 18a, 19a of each tension rod 18, 19 shown in FIG.
This can be inferred from the length from 2.33. The obliquely cut end surfaces of the lower ends 18a and 19a come into contact with the side surfaces of the front leg 1 or the rear leg 2.
In this way, the reversal rod 2 of the tension rods 18 and 19
The end of the rotation relative to 0, 21 is defined and the end of the rotation of the reversing rods 20, 21 relative to the front leg 1 or the rear leg 2 is defined.

Moreover, the upper side rod member 16 and the lower side rod member 1
7 is at the end position of the bending operation via the respective bending points 25 and 36 when the baby carriage is in the open state, and the upper side rod member 16 and the lower side rod member 17
It is impossible to bend the bending points 26, 36 further downward from the state shown in FIG.
It can be bent only in a direction that displaces these bending points 25, 36 upward.

In the state shown in FIG. 1, the fact that the locking rod 23 remains in a straight line greatly contributes to keeping the stroller open. For example, when the front wheels 3 collide with some obstacle in front of the baby while pushing the baby carriage, a force directed backwards is applied to the front wheels 3. In response to this, a force is exerted that brings the lower end of the front leg 1 closer to the lower end of the hind leg 2, and as a result, the opening angle between the front leg 1 and the hind leg 2, which are opened in an inverted V shape, is about to be closed. do. Accordingly,
The upper side bar member 16 may be bent through the bending point 25, and the stroller may undesirably attempt to fold. The locking bar 23 advantageously prevents this from happening. Hereinafter, the structure related to the lock bar 23 will be explained with reference to FIGS. 3 to 6, and the folding operation of the baby carriage will be explained. In addition, the third
6 through 6 are enlarged views of the location where the locking rod 23 is attached to the rear leg 2.

FIG. 3 corresponds to the open state of the baby carriage shown in FIG. As mentioned above, the locking rod 23 is rotatably mounted via a pivot point 41 on the bracket 42. bracket 42
is fixed to the rear leg 2 by, for example, a rivet 76. The bracket 42 is formed with an attitude regulating surface 77 that can come into contact with the side of the lock rod 23. A slider 78 that is slidable on the rear leg 2 is located below the bracket 42. bracket 42
is provided with a hook 79, and the slider 78 is provided with a hook 80, and a tension spring 81 is tensioned between these hooks 79,80. By this,
The slider 78 is always urged to slide upward on the rear leg 2, that is, in a direction approaching the posture regulating surface 77.

A lock release engaging portion 82 is formed on the slider 78, and the lock release engaging portion 82 is arranged on the same side as the posture regulating surface 77 and placed at a position where it can engage with the lock rod 23.

Further, a projecting portion 83 is formed on the slider 78, and an operating lever 85 is rotatably attached thereto via a pivot pin 84. Operation lever 85
The working end 85a which is one end of the bracket 4
2, and is located at a position that does not interfere with the lock rod 23. The other end of the operating lever 85 is formed with an operating end portion 85b. The operating end portion 85b forms a relatively wide surface extending in a direction perpendicular to the surface on which the operating lever 85 rotates. As will be explained later, this operating end portion 85b is provided with a boss 86 that engages with a boss 86 surrounding the bending point 36 of the lower side bar member 17 during the transition process from the open state to the closed state of the baby carriage. is being used.

In FIG. 3, the end of the lock rod 23 that is further distal than the pivot point 41 is controlled by the upper end surface 87 of the slider 78, which is biased to slide upward by the tension spring 81. It is brought into close contact with the regulating surface 77. By this, the first
As shown, the locking bar 23 is kept in a straight position and serves to maintain the open position of the stroller.

To close the baby carriage, first, the operating lever 85 is rotated in the direction of the arrow 88. Accordingly, as shown in FIG. 4, the operating end 85a of the operating lever 85 comes into contact with the bracket 42 and enters into the lower end surface of the bracket 42. Further rotation of the operating lever 85 is prohibited by the working end 85a coming into contact with the rear leg 2. In this way, until the operating end 85a comes into contact with the lower end surface of the bracket 42, the slider 78 is held on the rear leg 2 by the tension spring 81.
The lock release engaging portion 82 slides downward against the elasticity of the lock.
is engaged with the end of the locking rod 23 and pivots at the pivot point 41.
This locking rod 23 is rotated in the direction of arrow 89 about . In response to this rotation, the locking rod 23
The overall shape is bent in an inverted V shape around the bending point 39.

Depending on the above-mentioned bending of the locking rod 23,
The front legs 1 are moved in the direction where the front wheels 3 and rear wheels 4 approach each other.
and the rear leg 2 are slightly rotated. In response, the upper side rod member 16 bends so that its bending point 25 is slightly displaced upward, and furthermore, the upper side rod member 16 bends so as to displace the bending point 25 slightly upward. As a result, the lower side bar member 17 is also bent in a direction in which its bending point 36 is slightly displaced upward. Thus, once the upper bar member 16 and the lower bar member 17, together with the lock bar 23, are oriented for folding, the subsequent folding operation proceeds relatively easily. For example, the subsequent folding operation is performed by applying a force that brings both ends of the upper side bar member 16 closer to each other. Accordingly, the upper side rod member 16 is further bent through the bending point 25. In addition, the upper side rod member 1
6 is transmitted to the lower rod member 17 via the interlocking links 22a and 22b, and bends the lower rod member 17 in the same manner. In addition, the upper side rod member 1
The bending operation of 6 is relatively based on the pivot points 26 and 27.
is displaced upward, and the pivot points 30, 31 are displaced downward. Therefore, the front legs 1 and the rear legs 2 are brought close to each other so as to be parallel to each other, while the inversion rod 2
0 and 21 are rotated in the directions of arrows 90 and 91 shown in FIG. 1, respectively, so that the tension rods 18 and 19 are rotated parallel to each other.

FIG. 5 shows a state in which the above-described folding operation has progressed to a certain extent. In the drawing, there is an inverted V
The lower side bar member 17 is shown being bent into a letter shape. Paying attention to the position of the boss 86 formed to surround the bending point 36 of the lower side bar member 17, it is located at the operating end 85b of the operating lever 85.
has been brought to a position where it can come into contact with the Fifth
As the folding operation further progresses from the state shown in the figure, as shown in FIG. give.

As shown in FIG. 6, at the time when the operating lever 85 is rotated, the lock rod 23 has already been rotated to a state where it is aligned substantially parallel to the rear leg 2. When the operating lever 85 is rotated in the direction of the arrow 92 as described above, its working end 85a separates from the lower end surface of the bracket 42, and the slider 78 moves against the elasticity of the tension spring 81 to move the rear leg. 2 Try to slide upwards. In the state shown in Fig. 6, the slider 7
8 has slid to a position where it abuts the end of the locking rod 23. The posture of the operating lever 85 shown in FIG.
It is in almost the same posture as shown in the figure.

The folding operation further progresses from the state shown in FIG. 6, and finally the closed state of the baby carriage as shown in FIG. 2 is obtained.

The orientation of the front wheels 3 shown in FIG. 2 is rotated by 180 degrees with respect to the orientation of the front wheels 3 shown in FIG. This is because the front wheel 3 is supported by the front leg 1 via the caster 24, and in FIG. 2, the axle of the front wheel 3 is located in front of the caster 24. With this, the front wheel 3
are lined up at the same level as the rear wheels 4, and the baby carriage can stand on its own when closed. In addition, front wheel 3
However, even if the baby carriage is folded in the state shown in FIG. 1, there will be no problem in the folding operation.

Next, the operation of changing the baby carriage from the closed state shown in FIG. 2 to the open state shown in FIG. 1 will be briefly described. This operation is the reverse of the above-mentioned operation, and will be explained with particular attention to the operation of the locking rod 23 as follows.

In the early stages of the movement towards opening the pram,
A state as shown in FIG. 6 is obtained. When the baby carriage is further opened from this state, the locking rod 23
rotates about the pivot point 41 in the direction of arrow 93. During this rotation process, the slider 78 is always urged to slide upward by the tension spring 81, so the slider 78
While maintaining contact with the end of rear leg 2
Slide on top. When the baby carriage is in the open state, the slider 78 locks the lock bar 2 by its upper end surface 87, as shown in FIG.
3 and press this lock rod 23 against the posture regulating surface 77 of the bracket 42. As a result, the straight position of the locking rod 23 as shown in FIG. 1 is automatically achieved.

Although the invention has been described above in connection with the illustrated embodiments, several modifications can be made within the scope of the invention.

For example, in the illustrated embodiment, posture regulating surface 77
Although formed as part of the bracket 42, a separate member forming a posture regulating surface may be secured to the rear leg.

Further, although the tension spring 81 was used as a spring to bias the slider in the direction toward the posture regulating surface and was connected to the bracket 42, such a spring can also be replaced with a compression spring.
The mounting manner can be changed. In short, any spring may be used as long as it biases the slider in a direction toward the attitude regulating surface.

Effects of the invention As described above, according to this invention, the slider is provided with a lock release engaging portion that bends the lock rod while engaging with the lock rod as the slider slides. In order to make the rod bendable, the operating lever is operated to slide the slider and when the lock rod is released from the lock rod, the lock rod is simultaneously bent. Therefore, the locking rod is oriented with respect to the bending that will occur during the subsequent folding operation of the stroller, and the folding operation of the stroller can be easily performed.

[Brief explanation of the drawing]

FIGS. 1 and 2 are side views showing the frame structure of a baby carriage to which an embodiment of the present invention is adopted, with FIG. 1 showing the baby carriage in an open state and FIG. 2 showing the baby carriage in a closed state. Figures 3 to 6 show the locking rod 2.
FIG. 3 is an enlarged view of the portion where numeral 3 is attached to the rear legs 2, and sequentially shows the process from the open state to the closed state of the baby carriage. 7 to 12 are diagrams for explaining the background of this invention, and each shows a side view of the baby carriage as a line diagram. In the figure, 1 is a front leg (first leg), 2 is a rear leg (second leg), 5 is a side frame, 16 is an upper side bar member, 1
7 is a lower side rod member, 23 is a lock rod, 25, 3
6 and 39 are bending points, 42 is a bracket, 76 is a rivet, 77 is a posture regulating surface, 78 is a slider, 8
1 is a tension spring, 82 is a lock release engaging portion, 85
is the operating lever.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of first legs, a pair of second legs, and a pair of side frames each extending between each of the first legs and the second leg on the corresponding side; each side frame is configured to be foldable within each side of the stroller, such that each of the first legs and the corresponding second leg are foldable when the side frame is in an extended state. and move away from each other to realize the open state of the baby carriage,
On the other hand, a mechanism for locking the stroller in the open position, such that each of the first legs and the corresponding second leg approach each other when the side frame assumes the folded position to realize the closed position of the stroller. At least one of the second legs is provided with a bracket that protrudes toward the first leg on a corresponding side, and a bracket is provided between the bracket and the corresponding first leg. A self-bending locking rod is rotatably connected at both ends, and the second leg has a fixed posture regulating surface that sandwiches the locking rod while abutting each side of the extended locking rod. and a slidable slider, the slider being always biased by a spring in a direction approaching the attitude regulating surface, and a lock release member arranged on one side of the locking rod and on the same side as the attitude regulating surface. An engaging portion is formed to extend from the slider, and the slider is further provided with an operating lever that, when rotated, contacts the bracket and slides the slider itself in a direction away from the attitude regulating surface. and a mechanism for locking the baby carriage in an open state, in which the lock release engaging portion is moved in a direction to engage with and bend the lock rod. (2) The posture regulating surface is formed as a part of the bracket, and the posture regulating surface is formed as a part of the bracket.
A mechanism for locking the baby carriage in the open position as described in Section 1. (3) The mechanism for locking the baby carriage in the open state according to claim 2, wherein the spring is a tension spring connected between the bracket and the slider.