JPH0118050Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a portable folding chair that takes the form of one short tubular column when folded.

A wide variety of folding chairs have been commercially available as portable folding chairs, but those designed to be durable are large when folded, while those that are compact are weak and break easily.

In view of this, this proposal provides a portable folding chair that is compact and easy to carry as it becomes a short tubular shape when folded, and is comfortable and strong when unfolded, with the base of three or more arms pivoting. The upper elevating member, which is supported movably up and down by horizontal ear shafts at the same position from the center, is fitted into the sliding tube so that it can be raised and lowered with the free end of the arm facing upward, and the sliding tube is inserted into the short tubular columnar body. A lower elevating member is housed in the upper part of the column so as to be slidable up and down, and in the lower part of the short tubular column body, the bases of at least three legs are supported at equal positions from the axis by horizontal ear shafts so as to be expandable. The leg piece is stored with the free end facing downward so that it can be raised and lowered, and a foldable seat is hooked and attached to the arm.

Next, an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows a perspective view of the folded state, and Fig. 2 shows a vertical sectional view of the folded state. teeth,
Three or more arms 1 (eight in this example)
The arm 1 supports the horizontal ear shaft 2 provided at the base of the
an upper elevating member 3 supporting the upper elevating member 3 so as to be freely up and down; a sliding tube 4 into which the upper elevating member 3 is fitted so as to be slidable up and down in the axial direction; A short tubular column 5 and a leg 7 having a horizontal ear shaft 6 at the base are supported so as to be expandable by supporting the ear shaft 6, and can freely slide within the column 5. It has a lower elevating member 8 and the like.

Slits 9 and 10 corresponding to the width of the arm 1 are formed in the upper ends of the column 5 and the sliding tube 4, respectively.

The upper elevating member 3 supporting the arm 1 has a lower limit position within the column 5 where the lower end surface 3a abuts against a shaft-shaped stopper 11 mounted transversely on the column 5, and an upper limit position within the sliding tube 4. Protruding pin-shaped stopper 1
As shown in the enlarged vertical cross-sectional view in FIG. 3 and in the enlarged plan view in FIG. and a bolt-like stopper 14 with a head 14A that supports the proximal end of the arm 1 when it is laid down.

The angle at which the arm 1 falls is determined by adjusting the screwing depth of the stopper 14, that is, the position of the head 14A.

On the other hand, the column body 5 is provided with a vertical long hole-shaped guide hole 15, and a guide pin 16 with a head 16A inserted into the guide hole 15 is screwed onto the sliding tube 4 to allow sliding. The moving pipe 4 is non-rotating.

Further, a seat 17 that can be folded freely by hooking a peripheral portion near the free end of the arm 1
is installed.

The seat 17 is a stopcock 1 that allows air to be sucked in and removed.
8 is attached, and the arm 1 is laid down horizontally and then air is blown into the arm 1 to inflate it to a desired thickness.

Since the lower lifting member 8 supports three leg pieces 7 in this embodiment, radial slits 19 are provided at three equal angle division positions, and the base of the leg piece 7 is inserted into each slit, respectively. While the leg pieces 7 are supported by the ear shafts 6 so as to be expandable, the lower limit position is a position where the lower surface 8a abuts a pin-shaped stopper 20 screwed onto the column body 5.

At the lower end of the column 5, slits 21 are carved in correspondence with the leg pieces 7, into which the three leg pieces 7 extending outward from the lower elevating member 8 that has reached the lower limit position can be inserted. It has been set up.

Further, a bolt-shaped stopper 22 with a head 22A that determines the unfolding angle of the leg piece 7 is screwed into the center of the lower elevating member 8, and the unfolding angle of the leg piece 7 can be adjusted by adjusting the threading depth of the stopper 22. However, it is also determined by the depth of the slit 21.

Further, a circular wire 23 is provided that connects the tips of the arms 1, 1...
When fully opened, it forms a slightly inverted umbrella shape.

Since the present invention has the above-mentioned configuration, the sliding tube 4 is pulled out from the state shown in FIG. 2 to the upper limit as shown in FIG. Pull out.

Next, as shown in FIG. 6, while returning the sliding tube 4 to the lower limit position, all the arms 1 are laid down outward and fitted into the slits 9 and 10, while all the leg pieces 7 are pushed outward. The assembly is completed by unfolding it, fitting it into the slit 21, and blowing air into the sheet 17 through the stopper 18.

When folding, remove the air from the seat 17 and perform each operation in the reverse order.

When unfolded in this way, the leg pieces 7 touch the ground, the arms 1 support the human body, and the wires 23 make the arms 1, 1... into an inverted umbrella shape when fully opened, the seat 17 becomes a cushion, and the wires 23 further provide a cushion. Good quality.

Furthermore, since the sliding tube 4 is made to be able to move up and down within the column 5, and the upper elevating member 3 is allowed to be moved up and down within the sliding tube 4, excessive force is not applied when the arm 1 is inverted or raised. This makes assembly and folding operations extremely smooth, and the column 5
The lower surface of the slit 9 and the slit 1 of the sliding tube 4
The lower surface of the arm 1 is supported by the lower surface of the arm 1, supporting the weight of the human body, and the chair can have sufficient strength.

Note that the height may be adjusted according to the sitting height.

As is clear from the above explanation, the proposed folding chair is extremely easy to unfold and fold, and when folded, the arms and leg pieces are completely stored inside the column without protruding from the column. It's extremely compact because it's shaped just like your body, and it doesn't get in the way when you put it in your bag or carry it in your hand. It has many advantages, including experiments that have shown that it is superior to chairs.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an embodiment of the folding chair of the present invention in a folded state, Fig. 2 is a vertical sectional view of the same, Fig. 3 is an enlarged longitudinal sectional view of the upper elevating member, and Fig. 4 is an enlarged view of the same. A plan view, FIG. 5 is a longitudinal cross-sectional view showing a state in the middle of unfolding or folding with the sheet removed, and FIG. 6 is a longitudinal cross-sectional view showing the unfolded state. DESCRIPTION OF SYMBOLS 1... Arm, 2... Ear shaft, 3... Upper elevating member, 4... Sliding tube, 5... Column body, 6... Ear shaft, 7
... Leg piece, 8 ... Lower elevating member, 9, 10 ... Slit, 11, 12 ... Stopper, 13 ... Arm support groove, 14 ... Stopper, 15 ... Guide hole,
16... Guide pin, 17... Sheet, 18... Stopcock, 19... Slit, 20... Stopper, 21
...Slit, 22...Stopper, 23...Wire.

Claims (1)

[Scope of utility model registration request] An upper elevating member, which is formed by supporting the bases of three or more arms at equal positions from the axis and movably up and down with horizontal ear shafts, is inserted into the sliding tube so that it can rise and fall freely with the free ends of the arms facing upward. The sliding tube is housed in the upper part of the short tubular columnar body so as to be slidable up and down, and the bases of at least three legs are placed at the same position from the axis of the short tubular columnar body with horizontal ear axes at the lower part of the short tubular columnar body. This portable folding chair has a lower elevating member supported in a freely deployable manner, which is housed so as to be movable up and down with the free end of each leg facing downward, and a foldable seat is hooked to the arm.