JPH0136434Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a seat chair in which the angle of the backrest relative to the seat can be arbitrarily changed and adjusted, and the backrest can also be used as an armrest. It's about children.

BACKGROUND ART Conventionally, this type of seat chair has been widely known to have a structure in which the angle of the backrest can be arbitrarily adjusted with respect to the seat using a ratchet-type connecting fitting, etc. The upper part is divided into an upper part and a lower part, and the upper part can be bent and tilted at a predetermined angle with respect to the lower part, so that the backrest part can be used as a side rest, or it can be supported with the head slightly raised so that it is suitable for watching TV. A device that can be used as a so-called TV pillow has been proposed (Japanese Utility Model Publication No. 60-22944).

Problems that the invention aims to solve: However, in the conventional products such as those mentioned above, the upper and lower parts of the backrest are connected through an angle adjustment mechanism such as a ratchet type connecting fitting, so the cushion material is thickly attached. In the case of a thick-walled backrest, the tilting angle of the upper part is limited by the presence of cushion material near the bent part, and the upper part cannot be bent to the tilting angle required for use as an armpit or a so-called television. There was a problem.
For this reason, in conventional products, the thickness of the cushion material is reduced, or the cushion material is divided into two blocks, the upper part of the backrest and the lower part of the backrest, to make the upper part of the backrest part easier to bend. As a result, the cushioning properties of the backrest may be poor, or when the backrest is in its original state of use, a joint may be felt in the middle of the backrest, making it uncomfortable to use. Ta.

This invention attempts to eliminate the above-mentioned drawbacks by bending the connection structure between the lower and upper parts of the backrest so that the upper part is parallel to the lower part, regardless of the thickness and structure of the cushion material of the backrest. To provide a seat chair that can be used as an armrest like an armrest or a so-called TV pillow, and can also be used as a normal pillow, and has sufficient cushioning properties and a good feeling of use. It is something.

Means for Solving the Problems For the above purpose, this invention provides a seat chair in which a seat frame 1 and a back frame 2 are connected so as to be rotatable and held at an arbitrary adjustment angle.
The back frame 2 is constituted by an upper frame 2a and a lower frame 2b which are formed separately, and both upper and lower frames 2a, 2b are in a state in which the upper frame 2a is located on substantially the same plane as the lower frame 2b. It is characterized in that it is connected by a multi-joint connecting member 4 that is rotatable within a range from the lower frame 2b to a bent state parallel to the lower frame 2b at a predetermined distance.

Embodiments Hereinafter, the present invention will be explained based on illustrated embodiments.

1 is a seat frame formed by bending a metal pipe into a U-shape, and 2 is a back frame. These seat frame 1 and back frame 2 can be rotated freely and arbitrarily by an angle adjustment mechanism 3 such as a ratchet type connecting fitting. It is connected so that it can be held at any adjustment angle. The back frame 2 is divided into two parts approximately at the center of the height, and is made up of an upper frame 2a formed by bending a metal pipe into a U-shape, and horizontal bars welded and fixed between the upper and lower ends of both side pipes arranged in parallel. Lower frame 2b
The lower and upper ends of both the upper and lower frames 2a, 2b are bendably connected by a pair of left and right multi-joint connecting members 4.

As shown in FIGS. 2 and 3, the multi-joint connecting member 4 includes a pair of left and right plate links 6a and 6b having bearing portions 5 at both ends, which are arranged in parallel and facing each other.
Five pairs of longitudinally adjacent links 6a, 6a and 6b, 6b are successively arranged with the bearing portions 5 of the longitudinally adjacent links 6a, 6a and 6b, 6b overlapping each other, and the left and right links 6a, 6
The overlapping bearing portions 5 and 5 of b are sequentially pivotally connected by a shaft 7 extending between them. A pair of links 6a and 6b located at the upper and lower ends of the multi-joint connecting member 4 are welded and fixed to the lower end of one side of the upper frame 2a and the upper end of one side of the lower frame 2b, respectively. Further, the pair of left and right links 6a, 6b of this multi-joint connecting member 4 are provided with side wall portions 8a, 8b bent at right angles on both side edges, respectively, and serving as reinforcement and stoppers. , 8b can be rotated within a range from a state in which the upper frame 2a is located substantially on the same plane as the lower frame 2b to a state in which it is bent so as to be parallel to the lower frame 2b at a predetermined distance. The length is set to be flexible. That is, when this multi-joint connecting member 4 is bent,
The length of one of the outer side wall portions 8a is determined by the length in the longitudinal direction when the multi-joint connecting member 4 is in a linear unfolded state and connected so that the upper frame 2a and the lower frame 2b are located on approximately the same plane. The lengths are such that the ends of the side wall portions 8a of the adjacent links 6a, 6a and 6b, 6b collide with each other, so that both the upper and lower frames 2a,
When using 2b as a backrest, links 6a,
6a... and 6b, 6b... are restricted from mutually rotating any further outward, that is, toward the rear of the backrest. Further, the length of the other side wall portion 8b which becomes the inner side when the multi-joint connecting member 4 is bent is such that the multi-joint connecting member 4 is bent in a U-shape and the upper frame 2a is bent parallel to the lower frame 2b. At this time, as shown in FIGS. 2 and 3, longitudinally adjacent links 6a, 6a... and 6b, 6b
The length is such that the ends of the other side wall portions 8b collide with each other, so that both the upper and lower frames 2a, 2b are shaped like armrests as shown in FIGS. 5 and 6. Or when used as a pillow, the links 6a, 6a... and 6b, 6b...
are restricted from further mutual rotation in the bending direction, and a predetermined distance is maintained inside the bending portion. However, it goes without saying that the multi-joint connecting member 4 is not limited to the above-described structure; for example, three sets of links may be pivotally connected in the longitudinal direction so as to be bent in a U-shape. Good too.

Plate-shaped cushion materials 9 and 10 made of soft synthetic resin foam are attached to the upper surface of the seat frame 1 and the front and rear surfaces of the back frame 2, respectively, and the outer periphery thereof is a bag-shaped cushion made of soft synthetic resin foam. It is covered with a material 11. The plate-shaped cushion materials 9 and 10 are made of a soft synthetic resin foam that is relatively harder than the bag-shaped cushion material 11, and the approximately central portion of the plate-shaped cushion material 10 on the back frame 2 side, that is, the multi-joint connection member 4 A cushion material 10a made of a soft urethane foam similar to the bag-shaped cushion material 11, which is softer than other parts, is interposed in the bending and stretching portion corresponding to the front and rear surfaces of the cushion material. Further, on the inner surface side of the cushion material 10a on the rear surface side of the back frame 2, a tear-preventing pad 12 is provided to cover the part to prevent premature tearing due to friction with the multi-joint connecting member 4. ing.
The seat part 13 and the backrest part 14 are formed by integrating these parts with adhesive. In the figure, 15 is an exterior cover made of cloth.

Effects of the invention This invention has the above-mentioned configuration, in which the upper frame 2a and the lower frame 2b constituting the back frame 2 are arranged such that the upper frame 2a is connected to the lower frame 2b.
The lower frame 2b is connected by a multi-joint connecting member 4 that is rotatable in a range from a state where it is positioned substantially on the same plane as the lower frame 2b to a state where it is bent so as to be parallel to the lower frame 2b at a predetermined distance. Therefore, when the upper frame 2a of the back frame 2 is placed on the same plane as the lower frame 2b as shown in FIG. can do. At this time, the upper frame 2a does not bend any further backwards, so it can be safely and easily used as a backrest of the required height, and the upper frame 2a can be bent parallel to the lower frame 2b. As shown in Figure 5, it can also be used as a side armrest.
b can be held in an inclined shape and used as a so-called TV pillow, or it can be expanded so that the lower frame 2b of the back frame 2 is located on the same plane as the seat frame 1, as shown in FIG. By stacking the upper frame 2a on the upper surface side, it can be used as a mat with a pillow part, etc.
It can be used in various ways and is extremely convenient in practice.

Further, according to this invention, the upper frame 2a and the lower frame 2b of the back frame 2 are connected by the multi-joint connecting member 4 as described above, and the upper frame 2a is bent so as to be parallel to the lower frame 2b. Since a predetermined distance is maintained between the upper frame 2a and the lower frame 2b in the state in which the cushion is mounted, even if the cushion material attached to the back frame 2 is made of a thick single piece, it can be bent easily. can. Therefore, unlike conventional products in which the upper frame and the lower frame are connected at the intersection of their extended lines by an angle adjustment mechanism such as a ratchet type connecting fitting, the thickness of the cushion material in the backrest is However, in order to make the cushioning material of the backrest part sufficiently thick, the cushioning material may be divided into an upper block and a lower block to make it bendable. A chair that is comfortable to use can be provided by making the cushion material thick enough without having to remove the cushion material, and without creating a connecting part of the cushion material in the middle of the backrest part 14. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a perspective view of the frame body showing a state in which the upper frame is bent, Fig. 2 is a side view of a partially cutaway part of the main part, and Fig. 3 is the same. A plan view of the main parts, Figure 4 is a perspective view showing how it is used as a seat chair, Figure 5 is a perspective view showing how it is used as an armrest, and Figure 6 is a perspective view when it is used as a mat with a pillow. FIG. 7 is a vertical cross-sectional view of the seat in a seated state. 1... Seat frame, 2... Back frame, 2a...
...Upper frame, 2b...Lower frame, 3...
Angle adjustment mechanism, 4... multi-joint connection member.

Claims (1)

[Scope of utility model registration request] In a seat chair in which a seat frame 1 and a back frame 2 are connected so as to be rotatable and held at an arbitrary angle, the back frame 2 is formed by an upper frame 2a and a lower frame 2b which are formed separately. The upper frame 2a and the lower frame 2
b is rotatable within a range from a state in which the upper frame 2a is located substantially on the same plane as the lower frame 2b to a state in which it is bent so as to be parallel to the lower frame 2b at a predetermined distance. A seat chair characterized by being connected by a multi-joint connecting member 4.