JPH0349095Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a back support mechanism for a stroller, and more particularly to a back support mechanism for a stroller that can perform a reclining operation.

An object of the present invention is to provide a folding stroller whose backrest can be tilted in multiple stages by a reclining operation.

Another object of the present invention is to provide a folding stroller that can prevent an infant from falling out of the stroller even when the back rest is tilted to a bed-like position by fully reclining. It is something to do.

2. Description of the Related Art Strollers equipped with a so-called reclining mechanism that allows the inclination angle of a backrest to be changed with or without an infant seated are known. The angle of inclination of the backrest is expected to range from an angle that maintains an upright position to a full flat angle that maintains a horizontal position, but when the backrest is tilted to a full flat or similar angle, Because the entire body of the infant becomes bed-like, the body of the infant on the seat moves toward the back rest due to the recoil as the stroller advances and the movement of the infant, and finally the upper end of the backrest (full flat) The reality is that these angles are not used because of the risk of falling off (sometimes from the rear end).

The present invention is an attempt to solve these problems, and has been able to achieve its purpose by completing the invention described below.

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

The stroller of this invention has 1 push rod, 2 seat frames,
The armrest 3, front leg lever 4, and rear leg lever 5 constitute a frame, and two links 6 and 7 are attached to these frame.
and step 8 to form the whole.

Reference numeral 9 denotes a back support frame provided at the rear of the push rod 1 so as to be able to rise and fall freely, and a bracket 1 is attached to the push rod 1 at the lower end of the frame formed in an inverted U shape.
It is pivoted to 0. Reference numeral 11 denotes an inclination angle adjustment plate attached to the backrest frame 9, and a sliding guide groove 11a split along the length thereof has a tip end of an arm rod 12 whose base end is pivoted to the hand rod 1. Locking pin 1 provided in
2a is slidably locked.

Numerals 11b and 11b are locking grooves cut out at a predetermined interval above the sliding guide groove 11a, and the inclination angle of the back support frame 9 is adjusted by locking with the locking pin 12a.

The canvas C on which the infant is seated is formed using a piece of long and thin cloth, and its lower half is a seat floor part C1, and its upper half is a back rest part C2, and the seat floor part C1 and the back rest part It is designed so that it can be bent using the continuous portion of C2 as a pivot Q. Both sides near the tip of the seat floor part C1 are attached to the seat frame frames 2, 2, and both sides near the upper end of the backrest part C2 are attached to both sides near the top of the backrest frame 9. Further, the backrest part C2 can be bent into an L-shape on the side near the upper end, and the upper part of the L-shape is a head part C3. Shape-retaining core plates C21 and C31 are inserted into the back support portion C2 and the head portion C3, respectively.

Although the canvas C is made of a single long and thin piece of cloth, only the part where the seat floor part C1 and the back rest part C2 are connected, and the part where the back rest part C2 and the head part C3 are connected are bendable, and the other parts are bendable. It is said to have such hardness that it does not bend.

Reference numeral 13 denotes a head frame forming tool, which includes a base frame 13b to which a locking frame 13a is slidably attached, and the locking rod 13.
The base frame 13b is attached to the upper edge of the backrest part C2, and the receiving frame 13c is attached to the lower edge of the head part C3.

Reference numeral 14 denotes a holder for the back support frame 9, and a frame body having a round-shaped side surface is attached to the back surface of the head portion C3, and the upper end side of the back support frame 9 is inserted through this round-shaped opening 15. The back support frame 9 is pivotally attached to the back surface of the push rod 1 so as to be able to rise and fall freely around a pivot P, and a head portion C3 is bendably connected to the back support portion C2 above the back support portion C2. The holder 14 is provided with a vertical opening 15 on the back surface of the head portion C3 (see FIG. 5), and the upper edge 9a of the back support frame 9 is attached to the opening 15 of the holder. is inserted so that it can freely slide up and down. Further, the length of the opening 15 of the holder 14 is such that when the back support frame 9 is stood up, the upper end side 9a of the back support frame 9 moves downwards of the holder 14, and the back rest part C2 and the head part C
3 are in a straight line and when the back support frame 9 is laid down, the upper end side 9a of the back support frame 9 moves above the holder 14, and the back support part C2 and the head part C3 are bent. The length is set so that it forms an L-shape.

When the back support frame 9 is erected, the back support part C2
In order to maintain the head portion C3 in a straight line, as shown in FIG. do. Locking rod 13a and receiving frame 13c
Due to the engagement, the back support portion C2 and the head portion C3 are supported on the same line. Further, when the back support frame 9 is to be tilted horizontally, the engagement between the locking rod 13a and the receiving frame 13c is released, as shown in FIG. Then, the back support frame 9 slides on the holder 14, and the back support part C2 and head part C3 are bent into an L shape and locked. At this time, the canvas C is directly suspended and stretched under the back support frame 9, as shown in FIG.

That is, as the backrest frame 9 is raised, the backrest part C2 is raised accordingly, and the angle between the backrest part C2 and the head part C3 is gradually widened (as indicated by the dotted line in FIG. 3). (see standing position shown),
When the back support frame 9 is further raised up, the upper end of the head portion C3 slides through the opening 15 of the holder 14 provided on the back surface of the head portion C3, and moves upwards above the upper end side 9a of the back support frame 9. As the height increases, the back rest part C2 and the head part C3 are finally extended and become straight, and at that time, the upper end side 9 of the back rest frame 9
a has been moved below the holder 14. (See the standing state shown by the solid line in Figure 3). Furthermore, as the back rest frame 9 is laid down, the back rest part C2 is brought down and the angle formed between the back rest part C2 and the head part C3 is gradually narrowed, and the back rest frame 9 is further laid down. As you go, head section C
While sliding through the opening 15 of the holder 14, the upper end of the back rest frame 9 moves downward to the upper end side 9a of the back rest frame 9, and finally reaches the back rest part C2 and the head part C3.
has an L-shape, and at that time, the upper end side 9a of the back support frame 9 has moved above the holder 14, and the head portion C3 is directly suspended and stretched below the back support frame 9 ( (See the collapsed state indicated by the dotted line in Figure 3).

Reference numeral 14a designates engagement rings for preventing sinking provided on both sides of the back surface of the intermediate portion in the length direction of the canvas C (the boundary between the seat floor portion C1 and the backrest portion C2), and is located near the rear end of the armrest 3. It is engaged with a locking hook 14b suspended from the holder.

Note that the engagement rings 14a, 14a are provided on the back surface of the canvas in the portion where the engagement rings 14a, 14a are to be provided.
It is desirable to attach a reinforcing belt-like fabric by sewing or abutting the reinforcing fabric so as to extend it across 4a.

The present invention configured as described above can have the following effects.

() Back support frame 9 formed at the rear of the push rod 1
Since the angle can be freely adjusted using the arm rod 12 and the tilt angle adjusting plate 11, the appropriate tilt angle can be freely and instantaneously adjusted according to the infant's age.

() Since conventional strollers only require a normal seating position and a so-called "reclining" position tilted slightly backwards, infants can be prevented from falling from the stroller by using guard frames in the front direction and by using guard frames on both sides. In the plane direction, it was possible to sufficiently achieve the purpose by using side protectors, but in this invention, the canvas C can be reclined to a fully flat position in a straight line, so in this case, the infant who is lying flat will be able to In order to prevent the risk of the canvas C slipping in one direction and falling off, a head C3 is further connected to the upper end of the backrest C2 of the canvas C, and these can be easily formed using the head forming tool 13, resulting in a fully flat canvas. The infant sleeping on C is safe because it is prevented from moving upward by the head C3.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a perspective view of the backrest frame when it is folded down, and Fig. 2 is a perspective view of the backrest frame.
FIG. 3 is a side view showing an example of adjusting the inclination angle of the back support frame and an example of forming the head portion; FIG. 4 is a rear view. 5 is an enlarged perspective view showing an example in which a head portion is formed, and FIG. 6 is a perspective view showing how the head portion forming tool for the head portion and the back rest portion is attached inside the canvas. 1... Hand lever, 2... Seat frame, 3... Armrest, 4... Front leg lever, 5... Rear leg lever, 6, 7...
...Link, 8...Step, 9...Backrest frame, 1
0...Bracket, 11...Inclination angle adjustment plate, 1
2...Arm rod, 13...Head portion forming tool, 14...
Backrest frame holder, C...canvas, C1...
Seat floor part, C2...Backrest part, C3...Head part.

Claims (1)

[Scope of utility model registration request] A canvas C, in which a bendable head part C3 is connected above the back rest part C2, is stretched over a back rest frame 9 which is pivotably mounted on the back of the push rod 1, and a canvas C is attached vertically to the back of the head part C3. In the back support mechanism for a stroller, a holder 14 having an opening 15 in the direction is provided, and the upper end side 9a of the back support frame 9 is inserted into the opening 15 of the holder 14 so as to be vertically slidable. Q is located below the axis P of the back support frame 9, and when the back support frame 9 is erected, the upper end side 9a
moves downwards on the holder 14 so that the back rest part C2 and the head part C3 are in a straight line, and when the back rest frame 9 is laid down, the upper end side 9a moves upwards on the holder 14. A head frame forming tool 1 is attached to the back surface of the back portion C2 and the head portion C3 so that the back portion C2 and the head portion C3 are bent to form an L-shape.
3 and the length of the opening 15 of the holder 14 is set.