JPS59134059A - Seat for baby carriage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to a baby carriage seat, and in particular, to a seat for a baby carriage, in particular, the inclination angle of the backrest part of the baby carriage seat can be changed, and when the backrest part 8 is in the most reclined state, it can be shaped like a bed. This invention relates to an improvement in the holding structure of a seat.

Description of the Prior Art A chair-shaped seat that includes a seat and a backrest is popular as a baby carriage seat. In such a seat,
If the backrest part is provided so that the inclination angle can be changed,
Some can even be transformed into a bed.

Safety standards for baby carriages require that a head guard be attached to a bed-shaped seat. A head guard is placed opposite the top of an infant's head in a stroller to prevent the infant's head from sticking out or even slipping off the bed-like seat. belongs to.

The helad guard described above is only needed when the seat is shaped like a bed. Therefore, when considering the comfort of infants and young children, the backrest should be relatively difficult to stand up.
) It is undesirable for the head guard to be placed over the infant's head to such an extent that Therefore, when the backrest is upright, the head guard is on the same plane as the backrest, and when the backrest is collapsed into a bed-like position, It is desirable that the device be positioned opposite the top of the person's head.

Prior art of interest to this invention is Japanese Patent Application No. 55-170452 (Japanese Unexamined Patent Publication No. 57-179) filed by the same applicant as the present application.
-95254) "Pram seat" and also Japanese Patent Application No. 55-170453 (Japanese Unexamined Patent Publication No. 57-95255) "
``Pram Seat''. In the former application, a backrest configured to include a hard core material is bendably connected to a helad guard at its upper end and bendably connected to a seat at its lower end. Ru. A seat shaping member is disposed on the back of such a backrest, and this seat shaping member is operated according to changes in the inclination angle of the backrest, thereby creating a baby carriage seat that satisfies the above-mentioned requirements. Disclosed. The latter application discloses a mechanism for imparting appropriate motion to the aforementioned seat shaping member.

However, in each of the above-mentioned prior arts, the mechanism for imparting desired motion to the seat of the baby carriage, particularly the backrest and head guard, is exposed, and the appearance is not very desirable. Furthermore, the structure includes protrusions that are unfavorable from a safety standpoint, and separate safety measures had to be taken to prevent injury.

In addition, the mechanism for shaping the seat, especially the backrest and head guard, has not yet reached the point where it can be handled completely independently from the stroller itself, and there are some restrictions on where such mechanisms can be installed. will receive.

OBJECTS OF THE INVENTION An object of the invention is to provide a baby carriage seat which advantageously overcomes the problems of the prior art mentioned above.

More specifically, it is an object of the present invention to prevent protrusions from protruding outward and to allow various mechanisms to be housed in appropriate blocks.
The seat of the baby stroller (' i!
14) It is to do L.

Summary of the Invention This invention replaces a seat, a backrest formed rising from the rear of the seat, and a head guard disposed on the -L side of the backrest, and the backrest has a hard core material. The present invention is applied to a seat of a baby carriage, which is formed to include a seat, which is connected at its upper end to be bendably connected to a helad guard, and whose lower end is bendably connected to a seat part.

Its devices including cams are used to control the postures of the backrest and head guard. In other words, the pair of main support rods whose inclination angle can be changed are as follows:
It is supported by a pair of brackets fixedly provided on a fixed part of the baby carriage main body. The aforementioned cam is fixedly formed at the lower end of the main support rod. A seat shaping member is movably connected between the upper ends of the pair of main support rods, the upper part of the seat shaping member constitutes a head guard holding member to which the upper end of the head guard is attached, and the lower part constitutes a backrest holding member that comes into contact with the back surface of the backrest portion. The degree of rotation of this seat shaping member is
It greatly contributes to determining the respective postures of the backrest portion and the head guard. A follower pin, which is to become a follower of the aforementioned cam, is movably received in an elongated hole formed in the bracket. A rigid link is connected between the follower pin and the seat shaping member, and movement of the follower pin is transmitted to the seat shaping member.

The shape of the cam is chosen to provide the following movement to the seat orthopedic member: In other words, in a cabinet where the main support rod is in an intermediate state of inclination from the most upright state, the angle of the seat shaping member with respect to the main support rod is approximately constant, and the backrest is approximately on the same plane as the head guard. The backrest holding members maintain the state of pushing up the back of the backrest so that they are lined up on top, and on the other hand, the main support rod is kept in the most tilted state, and the angle of the seat shaping member with respect to the main support rod changes, and the backrest The holding member is in the farthest position from the main support rod, the backrest section is in a state where it intersects the head guard at a nearly right angle, and the head guard is positioned so as to face the upper surface of the infant's head, as described above. .

The follower pin and the rigid link move in phase with the shape of the cam, but the rigid link allows the seat shaping part I to move the follower pin that moves along the shape of the cam. It determines the magnitude of the movement.

Effects of the Invention According to the present invention, the l1llll direction of the seat shaping member is ultimately determined by the shape of the cam, so that the desired movement of the seat shaping member can be achieved simply by appropriately selecting the shape of the cam. can give. Therefore, the seat shaping member with and has the same posture as the backrest and head guard.
lJfl! I will do t. In other words, when the backrest is in its most upright position, the backrest and the heradguard are lined up on almost the same plane, and the angle between the backrest and the heradguard is the same as the angle between the backrest and the heradguard. remains approximately constant from its highest state to its intermediate slope state. That is, while the seat is in the form of a chair, the head guard is not placed over the infant's head.

When the backrest is in its most reclined state, the head guard intersects the backrest at a substantially right angle. That is, when the seat is in a bed-like configuration, the head guard is positioned so as to face the upper surface of the baby's head, and can perform its original function. Therefore, it is possible to obtain a seat for a baby carriage that does not give an uncomfortable feeling to an infant placed in the baby carriage and also satisfies safety standards.

Further, the mechanism including the cam etc. can be housed with the bracket so that no protrusions protrude outward. In addition, each member for shaping the shape of the seat extends from the bracket, and in the end, all the members are held by the bracket, so this bracket is attached to the main body of the stroller. The features of this invention can be imparted to the seat of a baby carriage by simply attaching it to a suitable position. That is, the mechanism, which is a feature of the present invention, can be installed at any location depending on the design of the baby carriage.

DESCRIPTION OF THE EMBODIMENTS The above objects and features of this patent will become more apparent from the detailed description given below with reference to the drawings.

FIG. 1 is a right side view showing the frame structure of a baby carriage including an embodiment of the present invention. The baby carriage shown here is a foldable baby carriage, as shown in FIG. 8 in its folded state.

'W51 (), only the configuration related to the seat of the baby carriage will be explained. The seat of the baby carriage includes a seat part, a backrest part rising from the rear of the outside,
and a head guard disposed above the backrest. The seat, backrest and head guard are not shown in FIG. However, the seat is formed on the seat holding rod 1. , the backrest is
The head guard is provided approximately along the main support rod 2 extending upward and diagonally from the rear end of the seat holding rod 1, and the head guard is approximately attached to the β seat shaping member 3 installed at the upper end of the main support rod. Along with the crotch.

The seat holding rod 1 and the main supporting rod 2 are each one on the left and right.
It is something to be prepared for. The seat holding rod 1 functions as a fixed part on the baby carriage main body side, and a pair of brackets 4 are fixedly provided at each rear end of the pair of seat supporting rods 1. A pivot @5 is formed in the brackets 1 to 4, and the lower end of each main support rod 2 is supported by the pivot shaft 5 so that the angle of inclination can be changed. The changed IC inclination angle of the main support rod 2 is determined by the inclination angle fixing member 6 shown as an example.
Then, it will be fixed at that adjusted position. The inclination angle fixing member 6 is provided with a plurality of engagement recesses 7, and the main support rod 2 is provided with an engagement pin 8 that engages with any one of these four engagement portions 7. The inclination angle fixing member 6 is
It is rotatably supported on the main body side of the car. Engagement bin 8
By selecting the engagement recess 7 with which the main support rod 2 is engaged,
can be fixed at its adjusted tilt angle. Incidentally, such a tilt angle fixing means is not limited to the one shown in the drawings, but may be replaced with, for example, one disclosed in a patent application filed by the same applicant as the above-mentioned applicant.

2 is a side view showing the structure from the bracket 4 shown in FIG. 1 to the seat shaping member 3, and FIG. 3 is a sectional view showing the vicinity of the bracket 4 shown in FIG. It is. In addition, in Fig. 2' and Fig. 3, the main support rod 2
is in its highest state. Figure 4 shows the main support rod 2
FIG. 3 is a side view, partially in section, showing a state in which is in an intermediate inclined state. FIG. 5 is a side view, partially in section, showing the main support rod 2 in its most inclined state. FIG. 6 is a partially sectional side view corresponding to the state shown in FIG. 2 and showing the relationship between a portion of the backrest of the seat of the baby carriage and the helad guard. FIG. 7 similarly shows the relationship between the backrest portion and the helad guard, and corresponds to the state shown in FIG. 5.

As can be seen from both FIGS. 2 and 3, the bracket 4 includes two spaced apart plates, between which the main support rod 2 is sandwiched. It will be done. A cam 9 is fixedly formed at the lower end of the main support rod, and the pivot shaft 5 passes through this cam 9, so that the main support rod 2 is actually supported. A follower pin 10, which is a follower of the cam 9, is arranged so as to be in contact with the outer peripheral surface of the cam 9, and this follower pin 1o is movable into an elongated hole 11 provided in the bracket 4. accepted.

The elongated hole 11 does not extend linearly in its length direction, but has a bent shape. As will be clear from the explanation given later, this is because the position of the follower bin 10 is
Since the attitude of the follower bin 1 is greatly affected by the cam 9,
This is to try to adjust the position of movement of o.

The seat shaping member 3 consists of a substantially rectangular frame as a whole, and is connected between the upper ends of the pair of main support rods 2. The main support rod 2 is rotatably supported by a pivot shaft 12 passing through the upper end. A head guard holding member 13 is formed at the upper part of the seat shaping member 3, and a backrest holding member 14 is formed at the lower part. As shown in FIGS. 6 and 7, the backrest portion 15 is bendably connected to the helad guard 16 at its upper end. Although not shown, the lower end portion of the backrest portion 15 is bendably connected to the seat portion. At least the backrest portion 15
is configured to include a hard core material, and similarly, the head guard 16 may also be configured to include a hard core material. The upper end of the head guard 16 is attached to the head guard holding member 13. The back surface of the backrest portion 15 comes into contact with the backrest holding member 14 to maintain its posture. ' A rigid link is connected between them so that the movement of the follower pin 10 described above is transmitted to the seat shaping member 14. In the illustrated embodiment, the rigid link is comprised of a plurality of links. That is, the follower pin 10
is held at one end of the connecting link 17. A pivot pin 18 is provided at the other end of the connecting link 17, and this pivot pin 18 allows the central portion of the lever 19 to be connected to the connecting link 917.
is rotatably connected to. One end of the lever 19 is movably connected to the main support rod 2 via a pivot pin 20. A pivot pin 21 is mounted on the other end of the lever 19, and one end of a control link 22 is rotatably connected to the pivot pin 21.

The other end of the control link 22 is rotatably connected to the seat shaping member 3 via a pivot pin 23.

As is clear from both FIG. 2 and FIG. 3, the aforementioned connecting link 17 and lever 19 are the same on both sides of each bracket 4 and the support rod 2. are placed one by one.

Next, the operation of the baby carriage seat described above will be explained.

FIGS. 2, 3, and 6 show the backrest portion 15, that is, the main support rod 2, in its most raised position.

In this state, the back surface of the backrest portion 15 is pushed up by the backrest holding member 14, and the backrest portion 15 and the head guard 16 are aligned substantially on the same plane. In addition, in FIG. 6, the backrest portion 15 is shown to intersect with the head guard 16 at a certain degree, but at least the upper surface of the infant's head and the head guard 16
(Please note that, including this case, in this clear FBI, it is intended that the two planes are ``almost on the same plane.'') This state in which the backrest portion 15 is the most raised is realized from the relationship between the cam 9 and the follower pin 10, which are obtained according to the inclination state of the main support rod 2 that achieves this state. Ru.

In the fourth factor, the backrest portion or the main support rod 2 has an intermediate inclination.However, the shape of the seat of the stroller is still chair-like.

Therefore, even in this state, the head guard 16 needs to be lined up substantially on the same plane as the backrest portion 15. For this purpose, the angle of the seat shaping member 3 with respect to the main support rod 2 only needs to be kept approximately the same as in the case shown in FIG. The shape of the cam 9 is selected to achieve such a state. That is, in order for the seat shaping member 3 to nevertheless maintain a substantially constant angle with respect to the main support rod 2 when the main support rod 2 is tilted further, the control link 22 must be moved to the lower left in FIG. must be displaced in the direction. This causes the lever 19 to rotate clockwise about the pivot pin 20. This rotation causes the follower pin 10 in contact with the outer circumferential surface of the cam 9 to reach the lower end of the elongated hole 11, and this movement is caused by the movement of the lever 1 through the connecting ring 17.
This is accomplished by transmitting the information to 9.

5 and 7 show the backrest portion 15, ie, the main support rod 2, in its most reclined state. In this state, the seat of the baby carriage becomes a bed.

The angle of the seat shaping member 3 with respect to the main support rod 2 changes,
The backrest holding member 14 is in a state farthest from the main support rod 2. Therefore, the backrest portion 15 follows the backrest holding member 14 and falls downward, so that the backrest portion 15
crosses the head guard 16 at a substantially right angle. As a result, the head guard 16 is positioned Wlξ so as to face the upper surface of the baby's head.

In the state shown in FIGS. 5 and 7 as described above, when the main support rod 2 is in the most collapsed state, the control link 2
2 is realized by changing the posture of the seat shaping member 3 to 1IiIi@. It is governed by the position of this control link 2210. The position of the follower bin 1o is almost the same as the position of the follower bin 1o shown in FIG. In other words, if it is not necessary to make the postures of the backrest aB75 and helad guard 16 the same as in the upright state shown in FIG. 6 in the intermediate tilted state of the backrest portion as shown in FIG. This means that the follower bin 10 may be fixedly provided to the bracket 4. That is, the cam 9 and the elongated hole 11 are not necessary.

In this sense, the feature of the present invention is that while the main support rod 2 is in the most upright inclination state shown in FIG. 2 to the intermediate inclination state shown in FIG. It can be said that it is meaningful when the angle of 3 needs to be kept approximately constant.

In the seat operation described above, the follower pin 1° needs to move along the outer peripheral surface of the cam 9.

However, in the relationship between the cam 9 and the follower pin 1o, no active means is used to keep the follower pin 1o in constant contact with the outer peripheral surface of the cam 9. This depends on the weight applied to the backrest portion 15, which acts on the backrest holding member 14 and ultimately causes the follower bottle 10 to always come into contact with the outer peripheral surface of the cam 9. Note that in order to ensure that the follower pin 1o contacts the outer peripheral surface of the cam 9, the configuration shown in FIG. 10 may be adopted.

Referring to FIG. 10, an example in which a positive cam is used as the cam 9 is shown. In this positive cam 9, a groove 24 is formed in order to determine the movement of the follower pin 10. Wlt2
4 is inserted through the cam 9, and the follower bottle 10 is received therein. The shape of the groove 24 is similar to a part of the curve of the first cam 9 shown in FIG. 3, for example.

FIG. 8 shows the baby carriage shown in FIG. 1 in a folded state, and FIG. 9 shows an enlarged partial cross-section of the posture of the main support rod 2, etc. in the state shown in FIG. ing. This folding operation of the baby carriage is performed after the main support rod 2 is brought to its maximum upright position. What should be noted in such a folded state is that the main support rod 2, etc.
This means that the baby maintains its position without protruding too much from the folded baby carriage. This is realized because the above-mentioned inclination angle fixing member 6 draws the main support rod 2 toward the main body of the baby carriage. In this state, as shown in FIG.
1, the seat shaping member 3, control link 22, etc. are also kept substantially fixed.

Although this invention has been described above in connection with the illustrated embodiment, the main feature of this invention is the use of a cam.

Therefore, the rigid link connecting the follower bin and the seat shaping member can be replaced by other rigid links than those shown. For example, the follower bin and the seat shaping member may be connected by one link. Even in such a case, it is possible to give the seat shaping member a desired movement by devising the shape of the cam.

[Brief explanation of drawings]

FIG. 1 is a right side view showing the frame structure of a baby carriage provided with an embodiment of the present invention. FIG. 2 is an enlarged side view showing the main support rod 2 and the like provided in the baby carriage shown in FIG. 1, and shows the main support rod 2 in its most upright position. FIG. 3 shows a part of FIG. 2 in cross section. FIG. 4 is a side view, partially in section, showing the main support rod 2 in an intermediate inclined state. FIG. 5 is a side view, partially in section, showing the main support rod 2 in its most inclined state. FIG. 6 corresponds to the state shown in FIG. 2, and is a side view showing the posture of the backrest portion 15 and the heald guard 16. FIG. 7 corresponds to the state shown in FIG. 5, and is a one-sided view showing the posture of the backrest portion 15 and the heald guard 16. FIG. 8 is a right side view showing the baby carriage of FIG. 1 in a folded state. 9 shows an enlarged view of the posture of the main support rod 2, etc. in the state shown in FIG. 8. FIG. 10 shows a modified example of the cam, which is a feature of the present invention. In the figure, 1 is a seat holding rod, 2 is a main support rod, 3 is a seat shaping member, 4 is a bracket, 5 is a pivot shaft as a first pivot rod, 6 is an inclination angle fixing member, and 7 is an engagement member. Recessed portion, 8 is an engagement pin, 9 is a cam, 10 is a follower pin, 11 is a long hole, 12
13 is a head card holding member; 14 is a backrest holding member; 15 is a backrest portion;
6 is Heradguard, 17 is connecting link, 18.20.2
1゜23 is the pivot pin, 19 is the lever, 22 is 1lJl)
It's a link. Figure 2

Claims (2)

[Claims] (1) The seat includes a seat, a backrest rising from the rear of the seat, and a head guard disposed above the backrest, and the frontrest includes a hard core material. , a seat for a baby carriage which is configured to be bendably connected to the additional rear guard at its upper end and bendable to the seat at its lower end, fixedly connected to a fixed part of the stroller main body. provided - first
a pair of brackets each having a pivot shaft; a pair of main support rods that are supported by the first pivot shaft passing through their respective lower ends so as to be able to change the inclination angle; and an upper end of the main support rods. connected between the parts and rotatably supported by a second pivot shaft passing through the upper end of the main support rod;
A head guard holding member is formed on the top to which the upper end of the extraction head gunid is attached, and a seat shaping member is formed on the bottom, and a backrest holding member that abuts the back surface of the front rest portion is formed. a cam fixedly provided to the main support rod at the F end; a follower bin that becomes a follower of the cam and is movably provided in an elongated hole formed in the bracket; and the follower bin. a rigid link connected between the seat shaping members; and an inclination angle fixing means for fixing the changed inclination angle of the main support bar at a plurality of adjusted positions; The angle of the seat shaping member with respect to the main support rod is substantially constant while the seat member is in an intermediate state of inclination from the most upright inclination state, and the front rest portion is substantially on the same plane as the heald guard. When the front back holding members are pushing up the back surface of the front rest so that they are lined up, and on the other hand, when the main support rod is in its most inclined state, the angle of the seat shaping member changes and the seat shaping member changes. The backrest holding member is in a state farthest from the main support rod, and the backrest portion is in a state where it intersects the helad guard at a substantially right angle, and the seat shaping member that occurs during the operation of changing the inclination angle of the main support rod. The rotation is
A stroller seat, characterized in that it is controlled by the cam, the follower bin and the rigid link. (2) The rigid link has a connecting link that holds the follower pin at one end, one end is rotatably connected to the main connecting rod, and the center portion is rotatable to the other end of the connecting link. a control link, one end of which is rotatably connected to the other end of the lever, and the other end of which is rotatably connected to a relatively lower portion of the seat shaping member; Claim 1
Baby carriage seat as described in section.