JPS6226287Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hammock support mechanism for a stroller, and in particular, to simplify the mechanism and facilitate manufacturing when converting the hammock between a chair for infants and a bed for sleeping. However, it is designed so that it can be supported stably at all times, and the conversion action is significantly smoother, and the operation has been improved so that it can be easily performed with a single touch.

Hereinafter, the structure of the present invention will be described in detail based on the illustrated embodiment. In Figures 1 and 2 showing the entire stroller, 1 is a pair of left and right front leg levers, and 2 is generally U-shaped. Both leg rods 1 and 2 are cross-connected in a substantially T-shape so that they can be opened and closed around a pivot pin 3. Reference numeral 4 denotes a footrest frame which can be freely rotated from the middle of the front leg rod 1 and which also functions as a step.When the chair form of the hammock described later is used, the frame can be placed in a prone position with the front descending, and when it is in the bed form, it can be changed to an almost horizontal standing position. be done.

Reference numeral 5 designates a pair of left and right bending arms extending between the leg rods 1 and 2, the front ends of which extend toward the front leg rod 1;
Similarly, the middle portion is pivotally connected to the rear leg lever 2, and the rear end portion is pivotally connected to the sunshade cover mounting frame 6. This mounting frame 6 faces the inclined part of the rear leg lever 2 as if riding on it, and a rotating shaft 7 is horizontally suspended at the lower part of both ends thereof. However, the rotation shaft 7 may be a fixed shaft as long as it can rotatably support a vehicle body lock lever, which will be described later. Reference numeral 8 denotes a push frame, whose lower ends at both ends are pivotally supported by a rotation shaft 7. Reference numeral 9 denotes a hook plate rotatably pivoted to the middle of the hand push frame 8, which is removably engaged with a fixing pin 10 correspondingly protruding from the mounting frame 6, so that the vehicle body can be moved to the first position. It is locked in the manual push mode from the rear as shown in the figure.

Then, as shown by the chain line in the figure, the hand push frame 8 is rotated forward so as to be parallel to the rear leg lever 2, and the hook plate 9 is attached to a fixing pin that similarly protrudes from the middle of the rear leg lever 2. 11, it is also possible to convert the vehicle body into a configuration in which it is used face-to-face with an infant who pushes the vehicle from the front. 12 is a rotation operation dial for the hook plate 9, and 13 is a pair of armrest arms, the front end of which is pivoted to the middle of the rear leg lever 2, and the rear end of which is pivoted to the middle of the sunshade cover mounting frame 6. combined. Reference numeral 14 denotes a pair of vehicle body lock levers fixed near both ends of the rotating shaft 7, and a hook piece 15 that integrally projects forward from the levers is engaged with and detached from a fixing pin 16 that projects halfway on the bending arm 5. By freely locking the vehicle body, the vehicle body can be locked in the open position shown in FIG. On the contrary, the bending arm 5 is released so that the leg rods 1 and 2 overlap each other.
By swinging and displacing the armrest arm 13, the vehicle body can be folded into a compact size as shown in FIG. . It goes without saying that during this folding operation, the push frame 8 must be locked to the side of the sunshade cover attachment frame 6.

The present invention further equips the stroller with the above-mentioned framework with the following hammock support mechanism, so that the hammock can be used in the form of a chair on which an infant can sit and a box-like bed on which the infant can sleep, just like a sofa bed. It is specified that it can be used for conversion.

That is, in FIGS. 3 to 7, which are enlarged images of the mechanical parts, 18 is the left and right pin 19 fixed to the middle of the mounting frame 6, which also serves as the pivot pin 19 between the sunshade cover mounting frame 6 and the armrest arm 13. They are a pair of rotation guide plates, and both ends of the base of a U-shaped hanging frame 20 for hanging the second half of the hammock S are attached to pivot pins 2 that also participate in fixing the guide plate 18.
1. Reference numeral 22 denotes circular arc holes for regulating the rotation range opened in each of the guide plates 18, into which the engaging pins 23 protruding from near the base end of the hanging frame 20 are constantly inserted and engaged.
The hanging frame 20 can be rotated by a predetermined angle α through its circular arc hole 22. Reference numeral 24 denotes a pair of helical springs that bias the hanging frame 20 so as to always fall backwards, and are wound around the pivot pins 21 of the hanging frame 20, and both separated ends of the springs are attached to the mounting frame 20. It is locked in the middle of the frame 6 and on the engagement pin 23 of the hanging frame 20. 25
are a pair of ear rods fixedly extending from the hanging frame 20.

Further, reference numeral 26 designates a pair of adjustment guide plates that are fixedly integrated with fixing pins 27 and 28 near both ends of the lower part of the sunshade cover mounting frame 6, thereby forming a U-shape that is almost similar to the above-mentioned hanging frame 20. Both ends of the base of a back frame 29 that supports the back wall of the hammock S are rotatably connected by a pivot pin 30. However, it is also conceivable that the pivot pin 30 also serves as the fixing pin 28 of the adjustment guide plate 26. A safety cover made of synthetic resin or the like is attached to the adjustment guide plate 26 and the rotation guide plate 18 from the outside, but the cover is not shown.

Reference numeral 31 designates a notch hole, which is opened in each guide plate 26, for regulating the rotation angle β of the back frame 29 over a certain range, and making it possible to adjust it in stages such as reclining the rotation angle β. In the figure, the notch hole 31 is defined in three stages, top, middle, and bottom, that is, the inclination angle of the back frame 29 that rises and falls with respect to the mounting frame 6 can be changed to three stages, i.e., slow and steep. It is not limited to 3 stages. It is also conceivable that the notched hole 31 and the arcuate hole 22 be formed into grooves by bending the guide plates 26 and 18, without opening them through the respective guide plates 26 and 18.

32 faces the notch hole 31 in a mutually communicating manner,
The slide guide elongated holes 33 formed through the back frame 29 near both ends of the base are engagement bars that are always inserted into and engaged with the notched holes 31 while passing through both the elongated holes 32. A pair of coil springs 34 connected and suspended between the lock lever 14 of the vehicle body constantly apply a downward biasing force to the engagement bar 33, so that the engagement with the notch hole 31 is stably locked. ing. Reference numeral 35 denotes an adjustment operation lever extending from the engagement bar 33 in a manner substantially parallel to the back frame 29, and the middle of its inverted U-shape engages with a cross bar 36 that extends across the back frame 29 in a cross-like manner. As a result, it is held within the frame 29 so that it can always be rotated up and down together with the back frame 29 without falling naturally.

Then, by manually pulling up the adjustment lever 35 while resisting the coil spring 34,
The engagement lock position of the engagement bar 33 with respect to the notch hole 31 can be switched to three stages, upper, middle, and lower, and the up-and-down rotation angle β of the back frame 29 can be changed gradually and steeply. In this case, as shown in the figure, the operating lever 35 is integrally extended from the engagement bar 33, and the operating lever 35 can be pulled up easily with the fingertips of the operator's hand gripping the rear end of the back frame 29. At the same time, the engagement bar 33 and operating lever 35 are designed to support the bottom of the hammock S in conjunction with the rotation shaft 7 and cross bar 36. As long as the notch hole 31 of the lever 35 can be pulled up by
The portion of the bar 33 that engages with the bar 33 may alternatively be in the form of a pair of short pins on the left and right sides or in the form of other short pins.

Also, the coil spring 3 for pulling down the operating lever 35
4 is connected to the vehicle body lock lever 14 as described above, and while also serving as the spring 34, it also locks the hook piece 15 of the lock lever 14 and the fixing pin 16 of the bending arm 5, and is always pressed in the locking direction. Since the vehicle body is biased, there is no fear that the vehicle body will be subjected to a biasing force that may cause it to be accidentally folded when the operation lever 35 is pulled up to change the elevation rotation angle β stepwise. In addition, in the case of a frame in which the hand push frame 8 is not rotatable to face-to-face use with an infant, and is a fixed type that can only be pushed by hand from the rear, a hand push frame may be used instead of the sunshade cover mounting frame 6. 8 itself, the above-mentioned upper and lower pair of hanging frame 20 and back frame 29 may of course be separately pivoted.

In the above configuration, the first half of the infant hammock S is attached to the armrest arm 13, and the second half is attached to the hanging frame 20 in a hanging manner, as generally indicated by the chain line in FIG. ,
Particularly referring to the latter half, as is clear from FIGS.
5, the head wall portion 38 is also directed to the rear end of the hanging frame 20,
Furthermore, the bottom wall portion or back wall portion 39 is provided with bent pieces 40, 41, 42, respectively, to the cross bar 36 of the back frame 29.
It is wrapped from above with eyelet hooks 43, 44, and 45, and the separated head wall 3
Shape-retaining plates 46 and 47 are also enclosed in the 8 and back wall portion 39, so that both wall portions 38 and 39 can be bent freely.

5 and 6 show the bed form of the hammock S, in which case the hanging frame 20 and the back frame 29 have a substantially similar U-shape when viewed from above,
Similarly, when viewed from the side, the upper and lower positions are substantially parallel, maintaining a nearly horizontal prone posture, and the back frame 29
Hammock back wall 39 supported from below by
On the other hand, the head wall portion 38 stands up at a constant angle θ and has a box shape that can cover the head of a sleeping infant. Therefore, from this form, Hammock S
To convert the chair into a chair for infants, it is sufficient to grasp the rear end of the back frame 29 and push it up from below. At this time, the lifting operation of the adjustment operation lever 35 is not necessarily required.

By doing so, the operating lever 35 is attached to the back frame 29.
also stands up, so the engagement bar 33 of the lever 35
is switched from the lower position of the notch hole 31 to the middle position while resisting the pulling-down coil spring 34, and the seventh
As shown in the figure, the reclining state of the back frame 29 and the hammock back wall portion 39 is obtained, which divides the predetermined up-and-down rotation angle β into two equal parts. In this process, the back frame 29 does not interfere with the upper hanging frame 20 and stands up independently, and since the hammock head wall 38 is fixed to the hanging frame 20, the back frame 29 and the back wall 39 As you stand up, the head wall part 38 is pushed up from below, and the both wall parts 3 are brought down.
8 and 39 are kept at the angle θ of 180 degrees, and are flush with each other to function as a backrest.

Furthermore, when the back frame 29 is pushed up from the middle position to the upper position of the notch hole 31, the back frame 29 interferes with the hanging frame 20 in the process and is pushed forward and upward together against the helical spring 24. As a result, the back wall portion 39 and the head wall portion 38 of the hammock remain flush with each other and form a steep angle close to a right angle such that they overlap with the sunshade cover mounting frame 6 as shown in Figures 3 and 4. You can stand up and get the chair form of Hammock S. In that case,
Hanging frame 20 that is biased to fall backward and downward
is pushed up by the back frame 29, so both frames 20 and 29 move upright in close contact with each other. There is no problem at all, and there is no fear that the hanging frame 20 will fall forward and downward.

Next, when converting in the opposite direction to the above,
With the fingertips of the operator's hand holding the rear end of the back frame 29, the adjustment operation lever 35 is pulled up against the coil spring 34, and the back frame 29 is rotated backward and downward. Then, in the process of switching the engagement bar 33 of the operating lever 35 from the upper position to the middle position of the notch hole 31, the hanging frame 20
The support provided by 9 is lost, and the helical spring 2
In response to the pressing force of 4, it automatically rotates backwards and downwards, and quickly becomes a near-horizontal prone state as shown in FIG. 7.
If the back frame 29 is then tilted down to the lower position of the notch hole 31 by performing the same operation, only the back frame 29 will move independently in the process, and the back frame 29 and the hammock back wall will become nearly horizontal. By 39,
By forcibly pulling down the head wall 38, the head wall 38 is bent to stand up against the back wall 39, thereby obtaining the bed form of the hammock S as shown in FIGS. 5 and 6.

As described above, the present invention is a hammock support mechanism that can be used to convert between the seat chair for infants in a stroller and the sleeping bed. , Hanging frame 2 for attaching the hammock head wall 38
The back frame for fixing the hammock back wall part 39 is pivoted so as to be rotatable in a biased state where the hammock back wall 39 is always laid down almost horizontally. 29 is pivotally mounted so that the raising and lowering angle can be adjusted in stages, and when the back frame 29 is tilted down, the hammock S is maintained in a box-like bed form, and the back frame 20 is held in parallel with each other. Only when the frame 29 is erected to a predetermined inclination angle or more, the back frame 29 pushes up the hanging frame 20 together while resisting the above-mentioned pressing force, and both frames 20 and 23 overlap each other and erect. Since the hammock S is configured to be able to be converted into a chair form, the following effects can be achieved.

That is, the rear ends of the hanging frame 20 and the back frame 29 are pivotally connected, for example, by a metal pipe link member of a certain length, thereby forming a four-bar parallel link mechanism,
A device designed to enable the above conversion by its oscillating motion not only requires a separate link material, but also tends to be constrained in the conversion action due to its fixed length, resulting in a lack of smoothness and the link movement. Since the consideration point is determined as the most upright chair position of both frames 20 and 29, when the backrest is reclined in the middle,
Both frames 20 and 29 are not flush with each other in a straight line, so that the child sitting on the seat is forced to take a hunched posture, which is undesirable.

In this regard, according to the present invention, the sunshade cover mounting frame 6
Alternatively, the hanging frame 20 and the back frame 29, which are specifically pivoted to the upper and lower positions of the hand-holding frame 8, are not connected by link materials and can be rotated independently of each other. , the head wall part 38 of the hammock S is fixed to the hanging frame 20, and the back wall part 39 is fixed to the back frame 29, respectively, and the hanging frame 20, which is constantly biased in the rotating direction to lie down, is fixed to the hanging frame 20 at an inclination angle. When the stepwise adjustable back frame 29 is raised up beyond a predetermined angle, it is pushed up together from below to obtain the chair form of Hammock S; Hanging frame 2 by operation
Since it is set to move only the back frame 29 separately from 0 to obtain the bed form of the hammock S,
Both frames 20, 29 act smoothly without restricting each other, and at the intermediate stage of the inclination angle, the backrest portion of the hammock S can be easily formed with both frames 20, 29 to be correctly flush. In this sense, the notch hole 31 for adjustment is not subject to any restrictions in its manufacture, and the overall mechanism can be simple.

Further, even if the hanging frame 20 is so to speak stepless and can freely rotate within the angular range determined by the arc hole 22, the rotation is limited by the helical spring 2.
4, the back frame 29 is biased backwards and downwards, so there is no risk of it falling forward and covering the infant seated on the seat. All you have to do is hold it and operate it up and down, and it has excellent operability,
Since the suspension frame 20 subjected to the biasing force is pushed up from below by the back frame 29 whose inclination angle is adjusted and locked, the erecting movement of both frames 20 and 29 is carried out while overlapping each other and in close contact with each other. Become,
Conversely, when the push-up is released, the hanging frame 20 immediately falls down.

Furthermore, if the back wall portion 39 of the hammock S is fixed to the cross bar 36 of the back frame 29 as in the illustrated embodiment, the rear end of the back frame 29 can be grasped as a grip bar, and the cross bar 36 If the adjusting operation lever 35 is engaged and self-retained so that it can be raised and lowered together with the back frame 29, the lever 35 can be easily pulled up with the fingertips of the operating hand that is gripped. Also, the engagement bar 3 with the notch hole 31 in the lever 35
3 and the vehicle body lock lever 14 using a coil spring 34.
While using the spring force, the engagement between the engagement bar 33 and the notch hole 31 as well as the engagement between the hook piece 15 of the lock lever 14 and the fixing pin 16 of the bending arm 5 can be achieved all at once. If they are locked at the same time, it will not only be possible to effectively utilize the necessary parts, but also prevent accidental folding of the vehicle body during the stepwise adjustment operation described above. Since both frames 20 and 29 are pivoted separately, the load of the infant is not concentrated on one point, and of course the durability and strength can be improved, and in any case, the stroller can be said to be safe for infants.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the stroller to which the present invention is applied, Figure 2 is an overall side view of the stroller in its folded state, Figures 3 to 7 are all enlarged views of the main parts of the invention, and Figure 3 is 4 is a side view showing the chair form of the hammock, Fig. 4 is the back part of Fig. 3, Figs. 5 and 6 are side sectional views also showing the bed form, and Fig. 7 is a reclining part of the backrest corresponding to Fig. 6. It is a side sectional view showing a state. 6...Sunshade cover mounting frame, 8...Hand push frame, 1
8...Rotation guide plate, 20...Hanging frame, 24...
Helical spring, 26...Adjustment guide plate, 29...
Back frame, 35... Adjustment operation lever, 38... Hammock head wall, 39... Hammock back wall, S...
Hammock.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A device with pressure to constantly lower the hanging frame 20 for fixing the hammock head wall 38 to the upper position of the awning cover mounting frame 6 or the hand-held frame 8 in its place in a substantially horizontal position. The back frame 2 for fixing the hammock back wall portion 39 is pivotably attached to the hammock back wall portion 39 in a rotatable state, and is also attached to the lower position separately and independently without being connected to the hanging frame 20.
9 is pivoted so that the elevation angle can be adjusted in stages,
When the back frame 29 is laid down, the hammock S is maintained in a box-like bed form by working with the hanging frames 20 that are almost parallel to each other, and from this form, the back frame 29 can be raised to a predetermined angle of inclination or higher. Only when this happens, the hanging frame 20 is pushed up together by the back frame 29 against the pressing force, and the hammock S can be converted into a chair form as it is by the two frames 20 and 29 which overlap each other and stand up. Features a stroller hammock support mechanism. 2. Claims for Utility Model Registration: In the item described in Paragraph 1, it is provided that the undulation angle of the back frame 29 can be adjusted in three stages, slow and fast, and when the back frame 29 is operated to an intermediate inclination angle, the head of the hammock S Wall part 3
8 and the back wall part 39 are kept flush with each other at 180 degrees, and when the back frame 29 is operated to stand up from the intermediate angle, the hanging frame 20 is pushed up together by the back frame 29, and the hammock S is When the back frame 29 is shifted to the chair mode while remaining flush, and the back frame 29 is operated to lie down from an intermediate angle, the back frame 29
A hammock support mechanism for a baby stroller, characterized in that the hammock head wall 38 is made to stand up in a bent manner with respect to its back wall 39 by the movement of a chisel, thereby shifting the hammock S into a box-like bed form.