JPH0121099Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to a mechanism for changing the inclination angle of the backrest of a baby carriage seat.

Description of Prior Art Recently, many baby carriages to which a chair-type seat is attached are equipped with a mechanism for changing the inclination angle of the backrest, a so-called reclining mechanism.
Various types of reclining mechanisms actually exist, but in general, a backrest holding rod for holding the backrest of the seat is configured to rotate, and this rotation The inclination angle of the backrest is changed according to the Therefore, various reclining mechanisms are generally designed with respect to how to fix the backrest portion at a changed inclination angle.

In a typical reclining mechanism, a mechanism for fixing the inclination angle of the backrest holding rod is provided at a portion that rotatably supports the backrest holding rod.

Adding a reclining mechanism to the seat increases the commercial value of the stroller by itself, but
Furthermore, it goes without saying that it is desirable to be able to change the inclination angle of the backrest over a wide range. In particular, in order to make the stroller usable even for relatively young infants, the backrest should be
It needs to be sloped to the extent that it becomes bed-like.

However, as described above, when attempting to widen the range of change of the inclination angle, the mechanism for that purpose inevitably becomes large or large-scale. For example, when such a reclining mechanism is attached to a portion that rotatably supports the backrest holding rod as described above, the bulk of such a reclining mechanism becomes large. This not only makes the stroller look unsightly, but also contradicts the desire for a foldable stroller suitable for portable use to be folded into a small size.

Purpose of the invention Therefore, the purpose of the invention is to provide a mechanism for changing the inclination angle of the backrest of a baby carriage seat, which is compact as a whole and can change the inclination angle over a wide range. .

Summary of the invention In this invention, a backrest holding rod for holding the backrest of the seat of a baby carriage is provided so as to rotate around a pivot pin located at a fixed position relative to a fixed part of the baby carriage. The inclination angle of the backrest part changes according to the movement. A slider is slidably provided on the backrest holding rod, and the slider is provided with an engaging protrusion. On the other hand, a fixed bracket is attached to a fixed part of the baby carriage near the pivot pin, and this fixed bracket has the following features:
At least one engagement recess is formed to engage with the engagement protrusion. Further, the slider is biased by a spring so as to slide in a direction in which the engagement protrusion engages with the engagement recess. In such a mechanism, when the degree of inclination of the backrest holding rod increases and the engagement protrusion moves out of the range where it can engage with the engagement recess, it directly contacts the backrest holding rod and prevents the backrest holding rod from inclining further. A stopper is provided on the fixing bracket to fix the inclination of the backrest holding rod, and another structure for fixing the inclination of the backrest holding rod is realized in addition to the combination of the engagement protrusion and the engagement recess. Further, the fixed bracket further includes left and right side walls that sandwich the backrest holding rod and are connected to each other by ribs, and the stopper includes:
It is constituted by the ribs.

Effects of the invention According to this invention, as described above, it is possible to realize a configuration in which the inclination angle of the backrest holding rod can be further fixed by the stopper at a position unrelated to the engagement recess formed in the fixing bracket. The end of the change range of the inclination angle with respect to the backrest holding rod can be shared by this stopper, and the number of engaging recesses can be reduced accordingly, resulting in a smaller fixed bracket. be able to. Further, the fixed bracket has a structure including left and right side walls connected to each other by ribs, and the backrest holding rod is configured to rotate while being sandwiched between these left and right side walls. Therefore, not only the strength of the fixed bracket itself is increased, but also the backrest holding rod can be rotated more stably. Further, since the stopper is constituted by the above-mentioned ribs, the ribs can function not only for reinforcement but also as a stopper, and the provision of the stopper does not result in an increase in the number of parts.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a side view showing the entire baby carriage to which an embodiment of this invention is adopted. Although a seat is not shown in such a baby carriage, the seat portion of the seat is formed on a horizontal bar 1 extending in the front-rear direction, and the backrest portion is held by a backrest holding rod 2. For example, on the fixed part 3 of this baby carriage, which has a push rod, there is a fixed bracket 4.
For example, it is attached by a fixing pin 5. The backrest holding rod 2 is rotatably mounted, for example, by a pivot pin 6 located on a fixing bracket 4. In accordance with this rotation of the backrest holding rod 2 about the pivot pin 5, the inclination angle of the backrest portion is changed.

The assembly of the components associated with the backrest holding rod 2 of the baby carriage shown in FIG. 1 is shown in FIGS. 2 to 4.

As shown in FIG. 2, a slider 7 is slidably provided on the backrest holding rod 2. As shown in FIG. An operating portion 8 is provided to protrude from the upper end of the slider 7, and engagement protrusions 9 are provided from the lower end to protrude from both sides. A connecting pin 10 passing through the backrest holding rod 2 is attached to the slider 7. This connecting pin 10 serves as an acting portion that applies a downward force to the slider 7. This will be explained with reference to FIGS. 3 and 4.

As shown in FIG. 3, the connecting pin 10 is provided on the backrest holding rod 2 and
It is received in a long hole 11 extending in the length direction of the backrest holding rod 2, and is movable in the length direction of the backrest holding rod 2.
This also allows the slider 7 to slide. The connecting pin 10 is fixed to a spring receiving block 12.
holds one end of the compression spring 13. The spring receiving block 12 and the compression spring 13 are arranged within the tubular backrest holding rod 2. More specifically, an end insertion member 14 as shown in FIG. 4 is inserted from the lower end of the backrest holding rod 2. At the lower end of the end insert 14 a flange 15 is formed, which defines the end of the insertion of the end insert 14 into the backrest retaining rod 2 . A shelf 16 is formed on the end insertion member 14, and above this shelf 16 a spring receiving block 12 and a compression spring 13 are arranged. In this state, the other end of the compression spring 13 abuts against the upper end wall 17 of the end insertion member 14. In this way, after the end insertion member 14 holding the spring receiving block 12 and the compression spring 13 is inserted from the lower end of the backrest holding rod 2, the connecting pin 10 is inserted into the slider 7, and
It is attached to a spring receiving block 12 via a long hole 11. In this assembled state, the slider 7 is always urged downward by the compression spring 13, and the end of the downward slide is caused by the spring receiving block 12 coming into contact with the shelf 16. stipulated. In addition, in this assembled state, a through hole 18 through which the aforementioned pivot pin 6 passes is provided at the lower end of the backrest holding rod 2.

The fixing bracket 4 shown in FIG. 1 is shown in cross-section in FIG. The fixed bracket 4 is formed with a cylindrical portion 19 that receives the fixed portion 3, and the aforementioned fixed pin 5 passes through the through hole 20 formed in the wall of the cylindrical portion 19 and penetrates the fixed portion 3. The fixed bracket 4 is then attached to the push rod 3 as a fixed part of the baby carriage. The fixed bracket 4 is also formed with a through hole 21 through which the aforementioned pivot pin 6 passes. Therefore, by inserting the fixing pin 5 in a state where the through hole 21 and the through hole 18 are aligned, the backrest holding rod 2
is rotatably held relative to the fixed bracket 4. For example, two engaging recesses 22 and 23 are formed in the fixed bracket 4. The engagement recesses 22 and 23 are formed in portions that bulge out from the left and right side walls of the fixed bracket 4, as shown in FIG. 7, which will be described later.
The engagement protrusions 9 protruding from both sides are received. Ribs 24 and 25 are further formed to connect the left and right side walls of the fixed bracket 4,
These ribs 24 and 25 constitute a stopper 26. Further, as clearly shown in FIG. 7, the backrest holding rod 2 is held between the left and right side walls of the fixing bracket 4.

FIG. 6 shows the structure around the fixed bracket 4 of the baby carriage shown in FIG. FIG. 7 is a sectional view taken along line - in FIG. 6. Note that, like FIG. 1 described above, FIGS. 6 and 7 show the backrest holding rod 2 in its fully raised state.
In this state, as particularly shown in FIG. 8, the engagement protrusion 9 engages with the engagement recess 22.
The angle of the backrest holding rod 2 is fixed.

When it is desired to change the inclination angle of the backrest holding rod 2, the slider 7 is pulled up via the operating section 8. Accordingly, the compression spring 13
The slider 7 slides upward against the elasticity, and the engagement protrusion 9 disengages from the engagement recess 22. Thereby, the backrest holding rod 2 is in a state where it can rotate around the pivot pin 6. Then, by rotating the backrest holding rod 2 and engaging the engagement protrusion 9 with the engagement recess 23, for example, the angle of the backrest holding rod 2 is fixed in a more inclined state. This state is shown in FIGS. 9 and 10.

If you want to further increase the degree of inclination of the backrest holding rod 2, lift the slider 7 upward and move the backrest holding rod until the engaging protrusion 9 is out of the range where it can engage with the engaging recesses 22, 23. 2 and push it in until the backrest holding rod 2 stops falling. That is,
In response to such a tilting movement of the backrest holding rod 2, the stopper 26 comes into direct contact with the backrest holding rod 2, as shown in FIG.
This will stop any further incline. Here,
Regardless of the engagement between the engagement protrusion 9 and the engagement recesses 22 and 23, another tilted state of the backrest holding rod 2, that is, the maximum tilted state is achieved.

Note that in order to bring the engagement protrusion 9 into engagement with the engagement recess 23 and further into the engagement recess 22 from such a maximum tilted state, the backrest holding rod 2 may be simply lifted. That is, in this embodiment, while the backrest holding rod 2 goes from the maximum tilted state shown in FIG. 11 to the intermediate tilted state shown in FIGS. When it moves and faces the engagement recess 23, it automatically fits there. When the backrest holding rod 2 is further lifted from this intermediate collapsed state to the fully upright state, the engagement protrusion 9 touches the guide surface 27 leading from the engagement recess 23 to the engagement recess 22. As a result, the engaging protrusion 9 moves and automatically fits into the engaging recess 22 without any operation being applied to the slider 7.

Although this invention has been described above with reference to the illustrated embodiments, such embodiments can be modified as appropriate within the scope of this invention.

For example, in the embodiment described above, the engaging recesses 22, 2
Two 3s were provided, but even if there is only one, 3s
There may be more than one.

In addition, although the pivot pin 6 that rotatably supports the backrest holding rod 2 is located on the fixed bracket 4, such a pivot pin is placed in a fixed position relative to other fixed parts of the baby carriage. It may be located.

Furthermore, in the above embodiment, the compression spring 13 is arranged inside the tubular backrest holding rod 2 to achieve a compact structure, but such a compression spring can also be arranged outside the backrest holding rod 2. , a tension spring may be used instead of a compression spring.

Further, when the backrest holding rod 2 performs a rising operation, the intermediate reclining state and the maximum rising state are automatically fixed.
Such a configuration is not essential. That is, each tilted state may be fixed by lifting the slider 7 each time.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the entire baby carriage to which an embodiment of this invention is adopted. Figure 2 shows the first
It is a side view which shows the backrest holding rod 2 shown in a figure, and the structure related to it. FIG. 3 is a side view showing a state in which the slider 7 is removed from FIG. 2. FIG. 4 is a side view showing the arrangement relationship between the end insertion member 14 inserted from the lower end of the backrest holding rod 2 and the compression spring 13. FIG. 5 is a sectional view of the fixing bracket 4 shown in FIG. 6th
The figure is a partially cutaway side view showing an enlarged structure of the fixing bracket 4 and its vicinity in FIG. 1. FIG. 7 is a sectional view taken along line - in FIG. 6. Figure 8 shows
The engaged state of the engaging protrusion 9 in the state shown in FIG. 6 is further enlarged. FIG. 9 is a diagram corresponding to FIG. 6, in which the backrest holding rod 2 is in an intermediate tilted state. FIG. 10 is a diagram corresponding to FIG. 8, and shows the engaged state of the engagement protrusion 9 in the state shown in FIG. 9. FIG. 11 is a diagram corresponding to FIG. 6, and shows the backrest holding rod 2 in its maximum tilted state. In the figure, 2 is a backrest holding rod, 3 is a fixed part of the baby carriage, 4 is a fixed bracket, 6 is a pivot pin, 7 is a slider, 9 is an engagement protrusion, 13 is a spring (compression spring), 22 and 23 are engagement Matching recess, 24, 25
is a rib, and 26 is a stopper.

Claims (1)

[Claims for Utility Model Registration] (1) This device is for holding the backrest of the seat of a baby carriage, and rotates around a pivot pin located at a fixed position relative to the fixed part of the baby carriage. a backrest holding rod that changes the inclination angle of the backrest portion accordingly; a slider that is slidably provided on the backrest holding rod; an engaging protrusion provided on the slider; at least one attached to the engagement protrusion;
A seat for a baby carriage, comprising: a fixing bracket having a plurality of engagement recesses formed therein; and a spring for urging the slider to slide in a direction in which the engagement protrusion engages with the engagement recess. In the backrest part inclination angle changing mechanism, when the degree of inclination of the backrest holding rod increases and the engaging protrusion moves out of a range where it can engage with the engaging recess, it directly contacts the backrest holding rod and A stopper is provided on the fixed bracket to stop further tilting of the backrest retaining rod, and the fixed bracket further comprises:
A mechanism for changing the inclination angle of a backrest portion of a baby carriage seat, characterized in that left and right side walls sandwich the backrest holding rod and are connected to each other by ribs, and the stopper is constituted by the ribs. (2) The mechanism for changing the inclination angle of a backrest portion of a baby carriage seat according to claim 1, wherein the pivot pin is located on the fixed bracket. (3) the backrest retaining rod is tubular, and the spring is disposed within the tubular backrest retaining rod;
A mechanism for changing the inclination angle of a backrest portion of a baby carriage seat according to claim 1 or 2 of the utility model registration claim.