JPH0335143B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a baby carriage, and in particular, the step is
This invention relates to a baby carriage that has a front wheel and is mounted so that it is passed between a pair of front legs.

BACKGROUND OF THE INVENTION The above steps are generally fixedly mounted between a pair of front legs. The height of the step is usually set based on a child of about 2 years old.

Problems to be Solved by the Invention However, there is a considerable range in the age of infants or young children who are placed in prams. For example, 2 or 3 years old
Baby carriages are used for infants from a month old to children as young as three years old. Furthermore, even infants of the same age vary in body size.
Therefore, when a small infant or toddler is seated in the seat of a baby carriage, the baby's feet cannot reach the steps, resulting in a so-called dangling state. Conversely, for larger children, the distance from the seat to the steps is short, so if they want to put their feet on the steps, they have to bend their knees considerably. Therefore, it feels cramped.

This invention was made to eliminate the above-mentioned inconvenience, and its purpose is to provide a baby carriage whose step height can be adjusted as necessary.

Means for Solving the Problems The steps of the baby carriage according to the present invention include a pair of cylinders surrounding a pair of front legs and capable of sliding up and down on the front legs, and a step in a first position and a second position. and a footrest member attached between the pair of cylindrical bodies so as to be rotatable between positions. The cylinder has an engagement wall that can face and engage the outer surface of the front leg. Further, the footrest member has a contact surface that can contact the outer surface of the front leg from a direction opposite to the engagement wall. This contact surface includes a large diameter portion having a relatively large distance from the center of rotation of the footrest member and a small diameter portion having a relatively small distance from the center of rotation of the footrest member.

When the footrest member is in the first position,
The large diameter portion abuts the front leg, thereby engaging the engagement wall with the front leg and inhibiting the cylinder from sliding.
Next, when the footrest member is in the second position, the small diameter portion comes into contact with the front leg, thereby disengaging the engagement wall from the front leg and allowing the cylinder to slide.

Operation When attempting to change the height of the step, first the footrest member located at the first position is rotated and moved to the second position. When the footrest member is in the second position, the engagement wall of the cylinder body and the front leg are disengaged, so that the cylinder body can slide. Therefore, the step is slid to a desired height, and then the footrest is returned to the first position. In this state, the engagement wall of the cylinder engages with the front leg, and sliding of the cylinder is prohibited.

Embodiment Referring to FIG. 5, a baby carriage 1 includes a pair of handrails 2, 2 extending in the front-rear direction, seat support rods 3, 3 for supporting the seat, and an upper end attached to the handrails 2, 2. a pair of front legs 5, 5 having front wheels 4, 4 at their lower ends, a pair of rear legs 7, 7 whose upper ends are attached to the front legs 5, 5 and have rear wheels 6, 6 at their lower ends;
The push rod 8 is provided with a push rod 8 having a letter-shaped shape. The step 9 is attached so as to extend between the pair of front legs 5, 5.

Step 9 consists of a foot rest member 10 on which the feet of an infant sitting on the seat of the baby carriage are placed, and a pair of cylinder bodies 1 provided on the left and right sides of this foot rest member 10.
1 and 11. The cylinders 11, 11 are arranged to surround the front legs 5, 5 and can slide up and down on the front legs 5, 5. A mechanism for adjusting the height of the step 9 is provided in connection with the cylinders 11, 11 and the front legs 5, 5. This step height adjustment mechanism is provided on the left and right sides, but since they are substantially the same, only the step height adjustment mechanism provided on the left side will be explained below.

FIGS. 6 and 7 show the cylinder 1 of step 9.
1 and the front leg 5 are shown in an enlarged manner. Also, in Fig. 1, the line -
A side cross-sectional view taken along is shown.

As is clear from each figure, the cylindrical body 11 is connected to the front leg 5.
It has a shape that surrounds the periphery. Specifically, the cylinder 11 has a left side wall 11b of a front wall 11a,
It has a right side wall 11c and a rear wall 11d. Therefore, the cylinder 11 extends along the front leg 5.
It is possible to slide on the top. Then, the entire step 9 slides in accordance with the slide of the cylinder 11.

As shown in FIGS. 6 and 1, the front wall 11a of the cylindrical body has no wall at its upper portion, and the outer surface of the front leg 5 is exposed at that portion.
Further, in the state shown in FIG. 1, the front wall 11a does not extend parallel to the front leg 5, and its upper end is
tilted away from the The left side wall 11b of the cylindrical body 11 projects forward, and the footrest member 10 is rotatably attached to this projecting portion via a pin 12. The footrest member 10 is rotatable between at least a first position shown in FIG. 1 and a second position shown in FIG.

The rear wall 11d of the cylindrical body 11 constitutes an engagement wall that can face and engage with the outer surface of the front leg 5. in particular,
In this embodiment, an engaging protrusion 13 is formed at the upper end of the rear wall 11d. On the outer surface of the front leg 5 facing the rear wall 11d, a plurality of engagement recesses 14 that can be engaged with the engagement protrusions 13 are formed in alignment in the vertical direction. The engaging recess 14 may be provided directly on the front leg 5, but in this embodiment, as shown in FIG. I am wearing it.

The footrest member 10 has a contact surface 16 that can come into contact with the outer surface of the front leg 5 from the direction opposite to the rear wall 11d of the cylindrical body 11. The shape of this contact surface 16 is shown enlarged in FIGS. 3 and 4. As shown in the figure, the abutment surface 16 has a circular arc surface with a distance R from the center of rotation of the footrest member 10, and a radius R with that distance.
The large diameter portion 16a is relatively larger than the radius R.
It includes a small diameter portion 16b that is relatively smaller than the small diameter portion.

When the footrest member 10 is in the first position as shown in FIGS. 1 and 3, the large diameter portion 16a
comes into contact with the outer surface of the front leg 5. At this time, the cylinder 11
The engagement protrusion 13 of the front leg 5 engages with the engagement recess 14 of the front leg 5, so that vertical sliding of the cylindrical body 11 is prohibited.

Next, as shown in FIGS. 2 and 4, when the foot rest member 10 is rotated clockwise in the drawings and moved to the second position, the small diameter portion 16b of the foot rest member 10 is placed on the front leg 5. comes into contact with the outer surface of the If the cylinder 11 does not move at all regardless of the rotation of the footrest member 10, a gap will be created between the footrest member 10 and the front leg 5, as shown in FIG. If the cylinder 11 is rotated clockwise in the figure to fill this gap, the engagement between the engagement protrusion 13 of the cylinder 11 and the engagement recess 14 of the front leg 5 is released, as shown in FIG. be done. In order to allow this rotation of the cylinder 11, the front wall 11a of the cylinder 11 is formed to be slightly inclined as described above.

In the state shown in FIG. 2, the cylinder 11 can slide vertically along the front leg 5. Therefore, the step 9 is moved to a desired position, and then the foot rest member 10 is rotated counterclockwise in the figure to move it to the first position shown in FIGS. 1 and 3.
move it to the position. Thus, step 9
is fixed at the desired height. Note that if a foot is placed on the footrest member 10 in the state shown in FIGS. 1 and 3, the footrest member 10 attempts to further rotate counterclockwise, increasing the pressing force against the front leg 5. Therefore, the cylinder 11 is more firmly fixed to the front leg 5.

The embodiments shown in FIGS. 1 through 7 are merely exemplary embodiments of the invention. Accordingly, various variations or modifications are possible. Some of the modified examples will be listed and explained below.

Modification Example 1 Referring to FIG. 8, the cylindrical body 11 constituting the engagement wall
An engaging protrusion 17 is formed on the rear wall 11d. The front leg 5 facing the rear wall 11d is provided with serrated teeth 18 that can engage with the engagement protrusion 17. Also in this embodiment, when the footrest member 10 is in the first position shown, the engagement protrusion 17 and the serrated teeth 18 engage,
Sliding of the cylinder 11 is prohibited. When the footrest member 10 is rotated clockwise in the figure, the engagement is released and the cylinder 11 can be slid.

Modification Example 2 Referring to FIG. 9, the cylindrical body 11 constituting the engagement wall
The upper part of the rear wall 11d is shaped to form a storage space between it and the front leg 5. A pressing engagement member 19 is arranged within this storage space. The press engagement member 19 has a tapered cross-sectional shape that becomes thicker as it goes upward. As shown in FIG. 9, when the footrest member 10 is in the first position, the pressing engagement member 19 and the front leg 5
are pressed into engagement, and this frictional force prevents the cylindrical body 11 from sliding. Then, when the footrest member 10 is rotated clockwise in the figure, the engagement between the pressing engagement member 19 and the front leg 5 is released, and the frictional force between them is eliminated. Therefore, the cylinder 11 can slide along the front leg 5. Note that, in order to increase the frictional force between the press engagement member 19 and the front leg 5, it is preferable that the press engagement member 19 is made of, for example, rubber.

Modification Example 3 Referring to FIG. 10, the cylinder body 1 constituting the engagement wall
A pressing protrusion 20 is formed on the upper part of the rear wall 11d. And, correspondingly, front leg 5
A soft body 21 that can press into engagement with the pressing protrusion 20 is attached to the holder. For example, rubber or the like is used as the soft body 21. In the state shown in FIG. 10, the pressing protrusion 20 is in pressing engagement with the soft body 21,
The frictional force between the two prevents the cylindrical body 11 from sliding. Then, when the footrest member 10 is rotated, the pressing protrusion 20 is disengaged from the soft body 21, and the cylindrical body 11 can be slid.

Variation 4 Referring to FIG. 5, by moving the step 9 to the highest possible position, it becomes possible to use the step 9 as an extension of the seat of a baby carriage. Considering that the step 9 is thus used as a seat extension, the footrest member 10 is preferably constructed so that its length in the front and back direction can be extended. An example is shown in FIG. In the embodiment shown, the footrest member 22 includes an upper plate 22a and a lower plate 22b that are superimposed on each other. Upper plate 22
a and the lower plate 22b are hinged at their respective front end portions via pins 23. Therefore, the upper plate 22a can be rotated forward as shown by the imaginary line in FIG. 11. The end of the rotation of the upper plate 22a is defined by the contact between the front end surface of the upper plate 22a and the front end surface of the lower plate 22b.

Effects of the Invention As described above, according to the present invention, the height of the step can be changed with a very simple operation.
Therefore, the height of the step can be increased when a small infant or toddler is seated on the seat, and the height of the step can be lowered when a large infant is seated on the seat. In this way, a comfortable environment can be provided for the infant or toddler placed in the baby carriage.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing essential parts of the invention. 1 is also a view taken along the line - in FIG. 7. FIG. 2 is a diagram showing a state after the footrest member 10 has been rotated from the state shown in FIG. 1. FIG. 3 is a diagram for clarifying the shape of the contact surface 16 of the footrest member 10. FIG. 4 shows the footrest member 10 from the state shown in FIG.
It is a figure which shows the state after rotation operation. FIG. 5 is a perspective view showing an embodiment of the present invention. FIG. 6 is an enlarged side view showing a portion where the cylindrical body 11 of the step 9 shown in FIG. 5 and the front leg 5 overlap. FIG. 7 is a view taken along line - in FIG. 6. FIG. 8 is a side sectional view of a main part of another embodiment of the present invention. FIG. 9 is a side sectional view of a main part of still another embodiment of the present invention. FIG. 10 is a side sectional view of a main part of still another embodiment of the present invention. FIG. 11 is a side view of a main part of still another embodiment of the present invention. In the figure, 1 is a baby carriage, 5 is a front leg, 9 is a step, 10 is a footrest member, 11 is a cylindrical body, 11d is a rear wall of the cylindrical body constituting an engagement wall, 13 is an engagement protrusion,
14 is an engagement recess, 16 is a contact surface, 16a is a large diameter portion, 16b is a small diameter portion, 17 is an engagement protrusion, 18 is a serrated tooth, 19 is a press engagement member, 20 is a press protrusion, and 21 is a A soft body, 22 a footrest member, 22a an upper plate, and 22b a lower plate.

Claims (1)

[Scope of Claims] 1. A baby carriage in which a step is installed so as to extend between a pair of front legs, wherein the step surrounds the pair of front legs and is capable of sliding up and down on the front legs. a pair of cylindrical bodies, each of which has a footrest mounted between the pair of cylindrical bodies so as to be rotatable between a first position and a second position; The body has an engagement wall that can face and engage with the outer surface of the front leg, and the footrest member has an abutment surface that can come into contact with the outer surface of the front leg from a direction opposite to the engagement wall. The contact surface includes a large diameter portion having a relatively large distance from the center of rotation of the footrest member and a small diameter portion having a relatively small distance from the center of rotation of the footrest member, and the footrest member is in a first position. when the large-diameter portion abuts the front leg, thereby engaging the engagement wall and the front leg to prevent the cylinder from sliding; and when the footrest member is in the second position. . The baby carriage, wherein the small diameter portion comes into contact with the front leg, thereby disengaging the engagement wall from the front leg and allowing the cylindrical body to slide. 2. The scope of claim 2, wherein an engagement protrusion is formed on the engagement wall, and a plurality of engagement recesses that can engage with the engagement protrusion are formed on the front leg facing the engagement wall. The baby carriage described in paragraph 1. 3. An engaging protrusion is formed on the engaging wall, and the front leg facing the engaging wall is provided with serrated teeth that can engage with the engaging protrusion. Baby carriages listed in section. 4. The baby carriage according to claim 1, wherein the engagement wall is provided with a pressure engagement member capable of pressure engagement with the front legs. 5. According to claim 1, a pressing protrusion is formed on the engaging wall, and a soft body capable of press-engaging with the pressing protrusion is attached to the front leg facing the engaging wall. baby carriage. 6. The footrest member on which the infant's feet are placed is:
The baby carriage according to any one of claims 1 to 5, which is configured such that its length in the front and back direction can be extended. 7. The footrest member according to claim 6, wherein the footrest member includes an upper plate and a lower plate stacked on top of each other, and the front end portion of the upper plate is rotatably attached to the lower plate. baby carriage.