JPH0530548Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a baby stroller, and particularly relates to a reclining structure for changing the inclination angle of a back rest.

[Prior art and its problems]

Although it is good for growing infants to take them outside for sunbathing and walks, it is important for parents to hold their infants for long periods of time.
Carrying a baby on one's back is physically painful for parents, and it is not desirable for infants to remain in a cramped position for a long time.

Strollers have been developed to address these problems, and many improvements have been made.

Improvements to strollers include so-called full-length strollers that can be used optimally depending on the state of the infant in the stroller, that is, when the infant is awake or when the infant is asleep. A reclining mechanism has been developed, and when the infant is awake, the back support that supports the infant's back maintains an upright position up to nearly 90 degrees, and the infant is in a sleeping or similar state. At one time, a structure was developed in which the seat floor and backrest formed one flat bed by making the inclination angle of the backrest closer to a flat state.

However, conventionally known reclining mechanisms, for example, extend the inclination angle by extending a link between the hand lever and the back rest, and changing the position where the tip of this link and the back rest are engaged. The structure for changing the inclination angle of the backrest is complicated, and the structure for changing it is attached to both sides of the backrest separately, so the changing operation must be done separately for the left and right sides. There was an inconvenience that the operation had to be performed twice or that both hands had to be used when performing the operation.

[Purpose of invention]

The present invention was developed in view of the above-mentioned circumstances, and is designed so that the inclination angle of the backrest, which is maintained at a predetermined inclination angle, can be easily changed by one-handed operation of either the left or right hand. The object is to provide a reclining structure for a stroller.

[Key points of the idea]

In the present invention, both ends of the frame rod of an inclination angle adjustment rod whose front shape is formed into a substantially U-shape by two frame rods and a horizontal frame rod are fixed in the longitudinal direction of the base end of the armrest rod or the hand lever. It is configured so that it can be pivoted so as to be freely undulating at the middle part of the backrest part, and the horizontal rod part is attached so as to cross the back surface of the backrest part, and the front shape is adjusted to be U-shaped. The key point is that the horizontal rod portion of the rod is configured to be removably locked to a locking mechanism provided at the center of the back of the backrest.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The stroller generally designated by A is a known one, and the frame is constructed by foldably combining a front leg lever 1, a rear leg lever 2, and a push lever 3, and the front leg lever 1,
The armrest rod 4 is inserted between the pivot point where the upper ends of the rear leg rods 2 are gathered together in one place, and the support rod 31 that stands up from the middle part in the longitudinal direction of the rear leg rods 2.
is installed.

Reference numeral 5 denotes a backrest part which stands upright at the rear end of the seat part 6 and whose inclination angle can be adjusted freely, and side frames 51, 51 are provided on both sides to safely enclose the infant's body and prevent it from moving. It is formed into a U-shaped cross section with the ridge erected by a small amount.

7 has two links 71, 71 formed by narrow plate-shaped metal rods, and two links 7 at both ends.
It is an inclination angle adjusting rod formed in a U-shape from the front by a horizontal frame rod 72 attached to the upper end of the link 71, 71, and the base end of the link 71, 71 can be raised and lowered freely at the rear end of the armrest rod 4. At the same time, the horizontal rod 72 portion is locked to a locking mechanism 8 attached to the central portion of the back of the backrest portion 5.

The above-mentioned horizontal frame rod 72 is constructed using a round bar-shaped metal rod.

The locking mechanism 8 has a plurality of locking grooves 81...81 formed in a semicircular cross-section with a size that allows the horizontal frame rod 72 to fit therein, formed in a stepped manner at regular intervals. A fixed plate 82 has a sliding groove 84 formed therein for moving the lock release plate 83, and a fixed plate 82 that slides vertically within the sliding groove 84 and has an interval corresponding to the interval between the locking grooves 81...81. Slanted surfaces 85 . . . 85 for pushing upward the horizontal frame rod 72 fitted in the retaining groove 81 are formed at regular intervals, and a release plate 83 whose side surface shape as a whole has a sawtooth shape.

Note that the intervals between the many locking grooves 81...81 formed in a step shape on the fixing plate 82 and the intervals between the many locking slope surfaces 85...85 formed on the locking release plate 83 are maintained at equal intervals. It is important to form the structure in such a way.

In addition, in order for the unlocking slope 85 to effectively close the side surface of the locking groove 81 formed in a step shape on the fixed plate 82 when the locking release plate 83 slides,
When the grip for unlocking operation formed at the upper end of the lock releasing plate 83 is lifted up to the position where it reaches the stopper 89 by sliding, the highest position of the slope surface 85 for unlocking is locked. This is achieved by sizing the sides of groove 81 so as to close them.

In the figure, 86 is a lid plate. Cutouts are formed on both sides of the cover plate 86 in the length direction to allow the horizontal rod 72 to slide thereon. Further, inside the cover plate 86, the horizontal rod 72 that is fitted and locked in the locking groove 81 of the fixed plate 82 suddenly rises, and the locking groove 81
A pressing plate 87 is attached to prevent the horizontal frame 72 from coming off, and the horizontal rod 72 is always pressed downward by this pressing plate 87.

88 is a spring for pressing down the pressing plate.

The fixing plate 82 is fixedly attached to the back surface of the back rest part 5.

Reference numeral 89 denotes a stopper for preventing the locking release plate 83 that performs a sliding operation from oversliding and separating from the fixed plate 82, and is formed upright on the backrest portion 5.

In the embodiment, fixing plates 82, 82 each having locking grooves 81 .

When constructed in this way, the horizontal support rod 72
The locking groove 8 can effectively prevent twisting, accurately maintain the horizontal state with respect to the backrest part 5, and
This is a preferable structure as it has the effect of dispersing the load that is borne between 1 and the horizontal frame rod 72 at the time of locking. However, this structure is not essential to the present invention.

FIG. 5 shows the structure of a stroller main body A having a structure different from that illustrated in FIGS. An example is shown in which it is fixedly installed parallel to the side surface.

In this structure, the base end portions of the links 71, 71 forming a part of the inclination angle adjustment rod 7 are pivoted to the intermediate portion in the length direction of the push rod 3 so as to be able to rise and fall freely.
This makes it possible to achieve exactly the same effect as the above configuration.

[Operation of the present invention]

The present invention configured as described above is operated as follows.

The reclining backrest 5 and the locking mechanism 8 have already been locked in the state illustrated in FIG. 2.

That is, the locking mechanism 8 attached to the back surface of the backrest part 5
The horizontal support rod 72 of the inclination angle adjustment rod 7, which is attached so as to cross the surface of the inclination angle adjusting rod 7, is fitted into and locked at an appropriate position in a locking groove 81 formed in a fixed plate 82.

In this case, the lock release plate 83 fitted in the sliding groove 84 formed at the center of the fixed plate 82 is subjected to downward force along the sliding groove 84 due to its own weight, so Since the lower position comes into contact with the horizontal frame rod 72, there is no possibility of a push-up operation.

Furthermore, the horizontal frame rod 7 that is fitted and locked in the locking groove 84
2 has its upper surface pressed by a pressing plate 87 attached to the inner surface of the cover plate 86, thereby ensuring that no undesirable lifting occurs.

In order to recline the backrest 5 in the above state, it is done by manually pulling up the upper end of the locking release plate 83 in the state illustrated in FIG. That is, by pulling up the release plate 83 by hand, the contact area of the release inclined surface 85 formed on the release plate 83 with respect to the horizontal frame rod 72 is changed from a low position to a high position, and the release plate 83 is raised. Due to the contact with the position, the horizontal frame rod 72 is pushed up as shown in FIG. 3 while resisting the pressing force of the pressing plate 87, and finally the engagement with the locking groove 81 is released.

As described above, when the inclined surface 85 formed on the release plate 83 is in contact with the highest position of the push-up inclined surface 85 formed on the release plate 83,
5 closes the locking groove 81 (see Figure 3), and the horizontal rod 72 is prevented from fitting into any of the locking grooves 81...81. Select the inclination angle, then release plate 83
By releasing the lift, the reclining angle of the backrest 5 can be changed very easily.

If the backrest portion 5 is to be reclined again thereafter, the purpose can be easily achieved by repeating the above-mentioned operation.

[Effect of idea]

The effects of the present invention having the above configuration are as follows.

(1) The horizontal rod 72 of the inclination angle adjustment rod 7, which is composed of two links 71, 71 and a horizontal rod 72 whose both ends are pivotally connected to the upper ends of the links 71, 71, is formed in the locking mechanism 8. The fitted horizontal rods 72 are selectively fitted into the fitting grooves 81...81, and the fitted horizontal rods 72 are released by sliding a locking release plate having sawtooth-shaped slopes for locking release on the upper surface. Since it can be pushed up and released automatically, it can provide excellent effects that cannot be obtained with conventional reclining structures.

(2) The reclining operation can be easily performed by operating the locking release plate 83 attached to the locking mechanism 8 with one hand, eliminating the complicated operation of conventional strollers and the impossibility of one-handed operation. I was able to completely resolve the issues.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention, and shows the first embodiment.
The figure is a perspective view of the stroller with the hand push lever tilted forward (tilted to face the infant), and Figure 2 is a perspective view of the stroller with the push rod in the locking mechanism. Figure 3 is a cross-sectional view of the main part of the same figure showing the state in which the horizontal frame lever is pushed up to change the locking position of the inclination angle adjusting rod, and Figure 4 is an exploded view of the locking mechanism. FIG. 5 is a perspective view of a stroller showing an example in which the attachment part of the push rod has been changed. 3...Hand bar, 4...Armrest bar, 5...Backrest part, 6...Seat part, 7...Inclination angle adjustment bar, 7
1...Link, 72...Horizontal rod, 8...Latching mechanism, 81...Latching groove, 82...Fixing plate, 83...
Lock release plate, 84...Sliding groove, 86...Lid plate, 8
7...Press plate, 88...Spring, 89...Stopper.

Claims (1)

[Scope of utility model registration request] Both ends of the link are attached to an inclination angle adjustment rod which is pivotally pivoted to the base end of the armrest rod or to the central portion in the length direction of the handrest rod, and to the central portion of the back of the backrest portion, and the inclination angle is adjusted. A locking mechanism that fits and locks the rod, and the inclination angle adjusting rod has a substantially U-shaped front shape with the link and the horizontal rod, and the horizontal rod serves as a backrest for the stroller. The locking mechanism has a structure in which locking grooves each having a semicircular cross section are formed in multiple stages into which the horizontal rod of the inclination angle adjusting rod can fit, and a locking groove is formed in the center part of the locking mechanism. A fixing plate having a sliding groove formed thereon for sliding the locking release plate, and a fixed plate that is slidably fitted into the sliding groove of the fixing plate, and has a sawtooth-shaped sloped surface for locking release on the upper surface. a locking release plate formed in multiple stages with the slopes having the same spacing as the locking grooves, and having an upper end as a gripping portion for unlocking operation; and a locking release plate and a fixing plate. It is attached to the top surface of the plate, and is combined with a lid body having cutouts formed on both sides for sliding the horizontal suspension rod of the inclination angle adjustment rod, and a locking body formed at the upper end of the lock release plate. A reclining structure for a stroller in which a grip for unlocking the lock protrudes above the lid.