JPH0534471Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a stroller, and in particular, a back rest for supporting the back of an infant is constructed of a canvas-like sheet material stretched over a push rod. death,
The tension of the backrest made of the sheet material is adjusted by changing the tightening state of an adjustment belt stretched over the back of the seat to support it, thereby making it possible to operate the reclining state. This invention relates to a reclining mechanism for a stroller.

[Prior art and its problems]

So-called strollers used for transporting infants are known to have various structures.

These are known as those with a so-called reclining mechanism that allows the relationship between the seat floor on which the infant sits and the backrest to be freely changed from a seated position to a lying position. In addition, the hand-push mechanism for moving the stroller is either one in which the hand-push stick stands up on the back side of the infant and is pushed from the back side, or one in which the hand-push stick stands up in the direction facing the infant. A variety of devices have been proposed, including devices that are pushed while facing the infant.

Among the above-mentioned known mechanisms, in particular, the back rest is made of a sheet material stretched over a hand lever, and the reclining operation is performed by changing the tension of the sheet material for the back rest. Although this is known from the description in Japanese Utility Model Publication No. 61-27820, the following drawbacks have been pointed out in the case of such a structure.

That is, (1) No. 2 of the above-mentioned public gazette (Utility Model Publication No. 61-27810)
As illustrated in detail in the figure, the sheet material constituting the backrest is attached only from the middle part to the lower part on both sides of the sheet material to hand levers (with appropriate clearance in the width direction). The upper end is formed into a chevron shape with a tapered shape that is narrower than the width of the hand lever, and the narrow part of the tapered upper end is inserted into the loop clip for slack adjustment. The structure was such that the reclining operation was performed by adjusting the slack of the back rest by tightening or loosening this clip, so the shape of the fabric that made up the back Not only is the upper end limited to a mountain-shaped shape, which limits the design of the seat, but also the absolute area of the fabric for the backrest is small, making it difficult to apply various modifications to the seat material.

(2) In addition to having a complicated structure, it is necessary to use both hands to adjust the tension of the seat for the reclining operation, and the operation means are also complicated.

This is the drawback.

And as a method for eliminating the above-mentioned drawbacks,
The inventors of the present application have placed a support belt near the upper end of the push rod to support the backrest seat,
A chair has been developed in which the angle of inclination of the backrest seat against which the support belt rests can be adjusted by adjusting the state of tension of the support belt.

However, even in this structure, the means for adjusting the tightening state of the seat belt is attached by inserting the tip of the support belt stretched across the back seat into a buckle attached to one of the rods of the push rod. When reclining, you can adjust the length of the belt by pulling out the tip of the belt through which the buckle has been inserted, or
Alternatively, since it was necessary to unwind the shortened support belt by loosening the tension on the buckle, only the back seat, especially the seat near the buckle, had to be moved when adjusting the buckle. The buckle is pulled in the direction of the hand lever on the side where the buckle is attached, and this causes vertical pulling wrinkles that are biased only on one side of the seat surface of the backrest, and these wrinkles come into contact with the infant's back. It had the disadvantage of impairing the usability.

[Purpose of invention]

In view of the above-mentioned circumstances, the present invention attempts to address these shortcomings by stretching the backrest sheet over the entire area surrounded by the push rods so that the slack in the width direction can be freely adjusted. ,
The back surface of the backrest sheet is supported by a support belt for adjusting the inclination angle that is freely adjustable in length and extends over the upper end of the hand lever. The purpose of the present invention is to provide a reclining mechanism for a folding stroller, which allows the reclining operation to be performed via an adjustment buckle provided at the center of the back of the stroller, without causing uneven pulling wrinkles on the back seat. be.

Another object of the present invention is that the structure of the adjustment buckle for adjusting the inclination angle is extremely simple, and the support belt can be stretched by tightening the adjustment belt or loosening the adjustment buckle. The purpose is to provide a reclining mechanism for a stroller that allows all operations to be performed with one hand.

[Key points of the idea]

In this invention, a backrest sheet is stretched over a front U-shaped push rod that stands up at the rear of the seat floor, covering the area surrounded by the push rod and giving an appropriate amount of slack in the width direction. In the reclining mechanism of the stroller, a support belt is provided above the hand lever, which supports the back support sheet from the back side and can adjust the inclination angle of the back support seat. The center part is slidably inserted into a buckle for tightening adjustment attached to the center of the back of the backrest seat, and the support belt pulled out from the buckle for tightening adjustment is approximately connected to the support belt part that crosses the backrest seat. A stroller arranged in an inverted T-shape and configured so that the length of the support belt can be adjusted by pulling up or loosening the exposed part of the support belt through which a tightening adjustment buckle is inserted. The key point of the design was the reclining mechanism.

〔Example〕

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

It should be noted that, although this embodiment shows an example of a structure most suitable for implementing the present invention, it is not limited to this structure.

1 is a front leg rod, and 2 is a rear leg rod. These two leg rods 1 and 2 are pivotally connected to the tip of an armrest rod 3 at the upper end via a pivot, and the two leg rods are opened and closed by opening and closing operations. The interval between 1 and 2 is such that it can be opened and closed in a lateral 8-shape.

4 is a hand lever formed in a U-shape from the front;
Its base end is pivotally connected to the middle part in the length direction of the rear leg lever 2 via the folding operation bracket 5, and the rear end of the armrest lever 3 is pivotally attached to a portion slightly above the base end. are doing.

The above-mentioned folding operation bracket 5 has a substantially L-shaped side surface, and has a lower end attached parallel to the rear leg lever 2 and pivotally attached to the rear leg lever 2, and a lower end of the push lever 4. The tip of the rear leg lever 2 is brought into contact with the back surface of the rear leg lever (the upper surface of the lever along the length direction) in parallel.

The folding operation bracket 5 is configured to be able to reversely undulate below the rear leg lever 2 using the shaft attachment portion at the lower end as a fulcrum during the folding operation.

Reference numeral 6 denotes a seat floor plate attached to both sides of the seat across the front leg lever 1 and the rear leg lever 2, and a suitable cushion material is attached to the upper surface.

A back support sheet 7 is stretched over the hand lever 4 that stands up from the rear end of the seat floor board 6 so as to close the area surrounded by the U-shaped frame rod that constitutes the hand lever.

The back support sheet 7 is made of a cloth material such as canvas, and is fixed at both ends with a width that allows for an appropriate amount of slack relative to the push rod 4.

Further, the upper end of the backrest sheet 7 is a free end that is not fixed anywhere.

There are various methods for fixing the backrest sheet 7, but fixing using locking hooks is probably the most basic.

8 is a support belt for adjusting the inclination angle of the back support sheet 7, and is stretched near the upper end of the back part of the hand lever 4 so as to intersect with the upright direction of the back support sheet 7 (cross the back surface). It has been given,
The center portion in the length direction thereof is inserted into a buckle 9 for tightening adjustment fixed to the back surface of the back support sheet 7, and both end portions are fixedly engaged with rod bodies constituting the push rod 4.

The tip of the support belt 8 inserted through the buckle 9 for tightening adjustment is exposed at an appropriate length on the upper surface of the buckle 9, and the tip is folded back, and a ring 91 for lifting operation is provided in the center of the folded portion. It is installed.

The buckle 9 for tightening the seat belt is the second buckle 9.
As illustrated in detail in FIGS. 7 to 7, it is composed of a lower fixing plate 92 and an upper fixing plate 94 having a stopper 93 attached to its upper surface so as to be movable up and down.

The lower fixing plate 92 is fixed to the back side of the back support sheet 7, and a support extended from one side of the push rod 4 is inserted into a through hole 95 bored at an angle of approximately 45 degrees near the lower end. The belt 8 is inserted through the support belt 8, and the support belt 8 exposed on the surface side of the through hole 95 can be folded upward along an inclined line. (See FIGS. 2, 6, and 7) The upper fixing plate 94 is fixed to the upper surface of the lower fixing plate 92, and the lower fixing plate 92 is drilled with an inclination angle of approximately 45 degrees. A through hole 96 which intersects this inclination direction and also has an inclination angle of approximately 45 degrees is bored at a position corresponding to the provided through hole 95, and the support belt 8 fed out from the hand lever on the opposite side is drilled. After passing through the through hole 96, the tip end of the support belt 8 is folded back upward. (Figure 2,
(See Figures 5 and 7) The above-mentioned support belt 8 is one piece, and one side of the support belt 8 which is folded in half is attached to the lower fixing plate 92.
The support belt 8 on one side is inserted into the through hole 95 drilled in the upper fixing plate 94 and the tip thereof is pulled out (pulled out to the right in FIG. 5).
The support belts 8, 8 are inserted through the through holes 96 formed in the support belts 8, 8, and the tips thereof are pulled out in the opposite direction to the above (pulled out to the left in FIG. be done.

The stopper 93 is attached to the upper end of the upper fixing plate 94 so that it can move up and down with an appropriate stroke. 92 and the support belt 8 pulled up from the through hole 96 of the upper fixing plate 94.

Note that a downwardly narrowed space for sliding the locking rod 97 is formed on the abutting surfaces of the lower fixing plate 92 and the upper fixing plate 94, and the above-mentioned locking rod 97 is narrowed in the upper space. Two rods 97 support belts 8,8
It is configured such that it can freely move between the two, and cannot slide in the narrow space below (it is sandwiched between the lower and upper fixing plates).

The action of the stopper including the locking rod 97 is well known as a stopper means for locking the sliding movement of the support belt 8, and is not particularly new in the structure of the present invention.

Additionally, although this is not a particularly important matter for the present invention, the inside of the backrest sheet 7 is made of a hard material to prevent the sheet member from being curved and deformed in the height direction due to the load during use. It is important to insert a suitable core material (not shown).

Furthermore, the detailed structure of the main body of the stroller is not essential to the present invention, and as long as the stroller has a structure in which a backrest sheet is adjustable and stretched over a push rod, it is possible to determine the structure of the other parts. There is no problem even if it is a stroller with a suitable structure.

[Manipulation of ideas]

The present invention configured as described above is used in the following manner.

(1) When raising the backrest seat and adjusting the reclining angle to a smaller value. (When tightening the support belt for adjusting the inclination angle) In this case, the ring member 91 for lifting operation provided at the bifold tip of the support belt 8 is held and pulled upward. By the above-mentioned lifting operation, the stopper 93 held between the two fixing plates 92 and 94 automatically moves the support belt 8
At the same time, it is pulled up and the stopping action is released.

In this state, if the support belt 8 is further pulled up by the desired length while holding the ring body 91 for lifting operation, the backrest seat 7, which is reclined at a large inclination angle like a bed, is instantly erected and reclined. Adjustments are made to change from standing to standing.

Note that when the lifting operation of the support belt 8 is stopped and the pulling state is released, the stopper 93 in the free state descends due to its own weight.
Inside the space formed between the lower fixing plate 92 and the upper fixing plate 94 so as to narrow downward due to the pulling action of the support belt 8 due to the infant's weight (load) applied to the backrest seat 7 from the front side. As it descends, it immediately exerts a locking action,
Thereafter, the support belt 8 can exhibit a stable locking action without loosening. (Refer to the solid line in Figure 4) (2) When folding down the backrest seat to increase the reclining angle. (When loosening the tension of the support belt 8 for adjusting the inclination angle) In this case, lift the stopper 93, which is attached to the upper end of the upper fixed plate 94 so as to be able to rise and fall freely, to release the locked state from the support belt 8. do. (Raise the state from the solid line in Figure 4 to the state shown by the two-dot chain line.) In this way, if the support belt 8 is released and the weight of the infant is applied to the backrest seat 7 in this state,
The support belt 8 can be freely extended in the length direction, and as a result, the back seat 7 can be freely tilted by a desired angle, and the reclining angle can be instantly increased.

When the backrest sheet 7 is tilted by a desired angle, the stopper 93 stops rising and is lowered into the downwardly narrowed space in the same manner as described above, so that the locking action is immediately exerted. This makes it possible to maintain the tilted state.

[Effect of idea]

Since the present invention is configured as described above, the length of the support belt 8 can be shortened by pulling up the support belt 8 through which the buckle 9 for tightening operation fixed to the central part of the back surface of the back support sheet 7 is inserted. This has an excellent effect in that the backrest seat 7 can be reclined very easily by a simple operation of increasing the length of the belt by letting it out.

Particularly, in the present invention, the support belt 8 is inserted through the buckle 9 attached to the central part of the back surface of the back support sheet 7, and the reclining operation is performed by pulling up or letting out the support belt 8 inserted through the buckle 9, so that the support belt 8 is not easily reclined. The wrinkles that occur on the seat surface due to the pulling of the belt 8 are now evenly distributed over the entire surface of the seat, and the unevenness of the back seat surface that was caused by attaching the buckle at an uneven position on the frame as in the past has been eliminated. It has the excellent feature of completely preventing the occurrence of wrinkles.

In addition, the support belt 8 of the present invention also has a back support sheet 7.
Since it is always in contact with the back surface of the back seat 7 and supports it from the back side, it can also function as a support structure for the back support sheet 7.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a perspective view showing the state in which it is applied to a stroller, and Fig. 2 is a perspective view showing the state in which it is applied to a stroller.
The figure is an enlarged front view of the adjustment buckle, Figure 3 is a side view of the same figure as above, Figure 4 is an enlarged longitudinal cross-sectional view showing the adjustment buckle, and Figure 5 shows the insertion state of the support belt from the front side. 6 is a perspective view taken from the rear side of the same figure as above, and FIG. 7 is an exploded perspective view of the main part of FIG. 5. 1... Front leg lever, 2... Rear leg lever, 3... Armrest lever, 4... Hand lever, 5... Bracket for folding operation, 6... Seat floor plate, 7... Backrest sheet, 8
...Support belt, 9...Buckle for tightening adjustment, 9
1... Ring body, 92... Lower fixing plate, 93... Stopper, 94... Upper fixing plate, 95, 96... Through hole, 97... Locking rod.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A front U-shaped push lever that stands up at the rear of the seat, closes the area surrounded by the push lever, and has an appropriate slack in the width direction. In the stroller reclining mechanism, a back support sheet is stretched across the stroller, and a support belt that supports the back support sheet from the back side and can adjust the inclination angle of the back support sheet is passed above the hand lever. The longitudinal center portion of the support belt is slidably inserted into a tension adjustment buckle attached to the center of the back of the back support seat, and the support belt pulled out from the tension adjustment buckle traverses the back support seat. It is arranged so as to have an almost inverted T-shape with respect to the support belt part, and the length of the support belt can be adjusted by pulling up or loosening the exposed part of the support belt through which the tightening adjustment buckle is inserted. A stroller reclining mechanism configured to allow the stroller to recline. (2) The buckle for tightening adjustment intersects the lower fixing plate, which has a through hole for belt insertion, which is bored at an angle of approximately 45 degrees, and the through hole drilled in the lower fixing plate. It consists of a combination of an upper fixing plate with a through hole for belt insertion drilled at an angle of inclination. A reclining mechanism for a baby stroller according to claim 1, wherein the locking rod has a stopper located in a tapered space formed in the middle of the two fixing plates.