JP2014091028A - Folding type portable chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding type portable chair, which is used outdoor or indoor, which is daily portable, which can be easily operated, and which has a light-weight and a small size.SOLUTION: A portable chair 1A is initially enlarged and molded to have a faucet bottom face to arrange air supply/discharge means 3 having a vent hole and a gasket at an intermediate portion of an external screw type cylindrical mouth, so that an air internal pressure can be instantly discharged by a half-turn operation to turn a cap back and forth. A grounding enlarged stay 8 is so formed at a base plate as can arbitrarily go in and out. Alternatively, a seating face extending type seat can also be equipped with a drop step on the right and left of the seating face and a backup mechanism so that the seat can be slidably mounted on a saddle type seating face.

Description

  The present invention relates to a small portable chair that can be folded.

  Small portable chairs are required to be easy to operate, have landing stability, and be lightweight and can be stored in a handbag, etc. Conventionally, pipe campus type, faceplate folding type, or inflation There were various types of chairs such as a ceremony, but none of them were satisfactory.

Problems to be solved by the invention

  The present invention has been devised by paying attention to the above-mentioned problems, has a seating height that can support a predetermined body load, has an appropriate seating area, and can easily sit and stand up, and is lightweight and compact. An object of the present invention is to provide a foldable portable chair that can be easily carried on a daily basis.

Means for Solving the Problems and Invention

In order to achieve the above object, according to the present invention, a portable chair main body is provided with a seat surface and a bottom surface using a predetermined flexible resin material in a substantially square shape or an elliptical shape in the middle. The body is provided in a horizontal bellows-like hollow box by blow molding, etc., the main body is initially molded in the shape of maximum expansion, and the bottom bottom is mainly provided in the spigot and air supply / discharge means is arranged. Thus, it can be formed so that it can be vertically expanded and contracted, and a stay for expanding the ground contact area can be provided on the bottom plate.
The main folding chair thus formed has a main body seating surface and a bottom plate, for example, having a width of 15 CM and a length of 22 to 24 CM, a height of 18 to 20 CM when enlarged, and a thickness when folded and reduced of 2.0 to 0 2 and 5CM, and the supply / discharge means arranged on the bottom plate is, for example, a cylindrical groove projecting externally in the center by providing a concave groove with a predetermined width in the longitudinal direction passing through the bottom center of the bottom plate. An external screw type mouth is provided with a cap, an air hole is provided in the cylinder, and an elastic gasket such as an O-ring is provided outside the base, so that the edge of the cap can be contacted and separated from the O-ring by rotating operation. Thus, the internal air pressure can be maintained and discharged, and the cap head is formed to be flush with the periphery of the bottom surface. In the present invention, a grounding stay for expanding the grounding area is provided on the bottom surface, for example, a fitting hole is provided in the center of the left and right sides of the bottom plate with respect to the seating direction, and a rearward position. It is bent in the shape of a letter, is provided with an inner 90-degree angle shaft core at the end portion, is molded and mounted in the fitting hole, and is formed so as to be semi-rotatable like a pendulum in the front and rear direction. Alternatively, half grooves can be provided on both side portions of the bottom plate so that they can be pulled out in the front-rear direction.
Therefore, the bellows type air supply / exhaust type chair formed in this way is a lightweight and small folding type chair that is folded when stored, and is loosened by a one-touch cap half-turn operation when used. Air is instantaneously sucked from the air vent and the body is automatically restored to its initial shape and expanded, then the cap is closed to maintain the internal pressure of the body, and the stay on the bottom plate is set to provide good sitting comfort and stability. Can be used in the state. When storing, again, the cap is opened half a turn. After the opening, the upper and lower parts of the trunk are compressed and air is discharged from the vent. Immediately, the cap is closed and the internal negative pressure compressed state is maintained and folded. It can be formed as possible. Therefore, a chair having a body loadability is completed by slightly opening it with a slight operation while both hands are attached to the main body and the cap without removing the cap from the mouth, and the chair is compressed, and optionally the height of the chair is increased. Can be adjusted. The air supply / discharge means can be provided on the upper seat surface.
Therefore, this portable chair is useful not only for daily gatherings and events, but also for resting during walks and trips, and the grounding stay is removable, and it is a Japanese style event on indoor tatami mats and cushions. It is also suitable for use. Of course, the present folding chair can be used by carrying it on a daily basis in combination with a cosmetic bag. In addition, the blow molded chair formed in this way can be provided with a round shape or a triangular shape as the seat surface of the main body and the torso plane, and at the same time the box shape torso , Trapezoidal and inverted trapezoidal shapes.

Further, according to the portable chair of the present invention, as described in claim 2, the main body has a hollow box bellows-like bellows shape having air supply / exhaust means at the bottom, and the area of the upper seating surface that can be expanded and contracted is arbitrarily expandable. Therefore, the upper seat surface is provided with an upper stage seat surface and a lower stage seat surface by providing a step difference from the center with respect to the seating direction to the left and right predetermined positions, and the outer edge portions before and after the lower step seat surface in the vicinity of the left and right step parts. A predetermined plate-like stopper projecting downward is formed to form a main body, and the main body full seat surface is provided with a saddle-shaped seat surface with three peripheral lower flanges divided into two, and A hook is provided at the flange center side end of this saddle seat surface, and the left and right split saddle seat surface is fitted and slidable in the lateral direction to form a backup mechanism in which the hook can be received and locked to the stopper. To form an arbitrarily enlarged seating surface and extend horizontally with the upper seating surface of the main body. Saddle seat surface is an upper surface flush mountable formed to it be. The air supply / discharge means can be provided on the upper seat surface.
The folding chair that can be arbitrarily enlarged from the left and right sides of the saddle-shaped seat surface formed in this way is provided with the planar shape of the bellows-shaped main body seat surface, for example, with a width of 15 cm and a length of 16 cm. By extending the two-piece saddle-shaped seating surface, it can be extended and formed to about 24 centimeters. Therefore, the left and right seat surface expansion type air supply / discharge type folding chair formed in this manner is provided with a small initial length shape of the main body and the seat surface of claim 1, and can be expanded and stored small in use. It can be provided to improve convenience. Of course, the ground contact surface expansion stay can be arranged on the bottom surface as in the first aspect.

  Further, according to the portable chair of the present invention, as described in claim 3, the chair seat surface is provided in a central two-part divided in the transverse longitudinal direction with respect to the seating direction provided in a substantially square shape made of a hard resin or the like. A flange with a depth is arranged and inverted saddle-shaped split seating surfaces are arranged in parallel, and a coupling mechanism using a rotating shaft is arranged in the center adjacent flange part so that the right and left coupling can be folded together. In the back of the seating surface, for example, four legs made of light alloy or reinforced resin are used, for example, an upper channel material and a lower square pipe are combined, and the upper base portion and a rotation pin in the middle. It can be folded in two steps, and can be stored in a deformed M-shape or a modified W-shape in which the back and forth direction of the seat is asymmetrical when retracted in the back of the seating surface of the four legs. It is possible to form a leg length that is twice as long as the leg length when stretched, and Can be wide-angle ground can be formed. Therefore, in order to assemble the four legs, a holder with four pairs of protrusions is provided on the back surface side base of the seating surface with a fitting hole provided with a slightly narrow notch at the lower part so as to have a predetermined angle. A ring-shaped plate adapter is attached to both sides of the base of the head of the leg, and forcibly fitted and fixed to the fitting hole from the notch using a rotating pin, and the restoring grip force of the holder As a result, the legs can be assembled and formed so as to be able to turn semi-rotatably to prevent falling off. At this time, it is desirable to apply and apply an adhesive inside the fitting hole. In addition, pressure-receiving blocks can be arranged on the left and right seating surface adjacent portions to enhance load resistance. In addition, a tension stay can be arranged at the back of the seating surface and between each leg, so that the ground contact stability can be improved. Alternatively, the variable leg may be configured to be slidable via a knock pin and bendable at the base by combining square pipes having different diameters so that they can be inserted. Further, the seating surface can be formed by providing it alone or can be molded using an aluminum material or the like.

  In the portable chair of the present invention formed in this way, for example, the seating surface is provided in two parts made of hard resin having a width of 16 to 17 CM and a length of 23 to 24 CM, and about 1, A 5CM flange is provided to provide a reverse saddle-shaped depth, a coupling mechanism is provided between both intermediate flanges to provide a palm-type foldable, and further, the back of the reverse saddle-shaped seat surface is bent, or The retractable two-stage leg is reduced and arranged in a deformed M shape so that it can be stored by providing a base, so that the legs facing each other can be bent and put in and out without overlapping each other. The leg length can be extended to form a suitable sitting height. Therefore, 4 pairs of leg base assembly holders are arranged at an angle, and a fitting hole with a notch is provided at the lower part. The heads of the four legs are attached to both sides of the fitting hole, and the hinge pins are also below Therefore, it is possible to assemble with an angle in a narrow space in the corner portion on the back surface of the seating surface, and an excellent arrangement balance can be formed. In this way, the legs can be formed in a deformed M-shape so that the total thickness after folding of the seating surface can be reduced to a size of about 16 to 17 CM with a length of about 3 to 3 CM and a width of about 11 to 12 CM. . And the seat height of the chair at the time of leg expansion | extension can be formed in about 27-28CM. Therefore, the foldable chair formed in this way is lightweight and compact, and the chair is easy to use with a comfortable seating leg length, and the grounding angle is set to an appropriate wide angle and stable. It can be installed. Also, a portable chair that is extremely easy to assemble and store is used for outdoor trips, walks, indoor and outdoor events, etc., and it is very convenient to fold regardless of age group or clothes. A chair can be provided. In addition, each leg can be provided with an extension stay to ensure grounding stability.

Effect of the invention

A portable folding chair 1A according to claim 1 of the present invention is a hollow box-type bellows-like air blowable body made of a flexible resin that can be vertically expanded and contracted, and a bottom plate is provided in the inlay, and air supply / discharge means is disposed. In addition, air can be supplied and discharged instantly by forward / reverse half-turn operation of the cap, and a grounding expansion stay is placed behind the sitting position to ensure body load stability. Further, the portable folding chair 1B according to claim 2 is provided with a two-folded bowl-shaped seating surface that can be arbitrarily enlarged on the upper seating surface, and when enlarged, the seating surface is approximately doubled and the entire surface is flush. Is done. In addition, the portable folding chair 1C according to claim 3 has a seating surface palm folding type chair, in which four legs of a two-stage bending type are housed in a deformed M shape in the back surface of the seating surface, so that the operation is extremely easy. The seat height when extended is an appropriate height of 27 to 28 CM and can be grounded at a wide angle.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  When the portable folding chair 1A of the present invention is shown in FIG. 1 to FIG. 6, the main body 2 made of a flexible resin is provided with a seat surface 2A and a bottom plate 2C in a substantially square shape, and an intermediate body portion 2B. A cylindrical deformed elliptical horizontal bellows-like top / bottom expansion / contraction type is provided so that air can be supplied / exhausted. The initial shape of the body 2B is blow-molded with a bellows-like shape when extended vertically, and the bottom plate 2C bottom 2a The air supply / discharge means 3 is provided with a groove 4 having a predetermined width in the longitudinal direction passing through the central part of the bottom surface in a gentle concave shape, and is formed into an inlay, and an external screw type cylindrical mouth projecting externally at the center portion A portion 5 is provided, a vent hole 5a is provided on the opposite side of the cylinder portion, a gasket 6 such as an elastic O-ring is provided outside the base, and a cap 7 is provided to rotate the peripheral portion 7a and the honey by forward rotation. The internal air can be kept airtight by touching, and the vent hole 5a is opened by reverse rotation of the cap. Are honey, opening and closing can be structured by the rotation operation while wearing the cap 7 is provided to allow air discharged by the upper and lower compressing body Te. At this time, the air supply / discharge means 3 is preferably formed such that the head 7b when the cap is tightened is flush with the surrounding ground surface of the bottom surface 2a or below, and the present invention is made of a light alloy on the bottom surface. A stay 8 for expanding the ground contact area, such as a round bar, is provided in a substantially U-shape around the bottom of the bottom plate 2C, and 90 ° angle shaft cores 8a are provided at both ends. For example, as shown in FIG. 2C sitting position is fitted to the fitting hole 2b provided slightly rearward from the center of the left and right sides of the seat, and is provided in such a manner that it can be swung halfway like a lower pendulum in the front-rear direction and protruded to the rear of the bottom plate to expand the grounding surface. It is formed so that it can be stored in the front outer edge of 2C. Although not shown, the concave groove on the bottom surface can be provided on a slightly wide planar spigot. Alternatively, the supply / discharge means can be provided on the upper seat surface.

The air supply / discharge portable chair 1A of the present invention formed as described above has, for example, a body 2 seat surface 2A having a width of 15 to 16 CM and a length of 22 to 24 CM, and an overall height of 18 to 20 CM when extended. Provided in a horizontal bellows shape, blow-molded, and provided with a bottom plate 2C approximately on the upper seat surface 2A, and the supply / exhaust means 3 in the longitudinal direction passing through the center of the bottom surface 2a, for example, a concave smooth groove portion of 5CM width 4, a cylindrical outer screw type mouth portion 5 of about 10 MMΦ projecting to the outside at the center portion is provided, a vent hole 5 a of about 5 MMΦ is provided on the opposite side of the cylinder portion, and an O-ring or the like is provided outside the base. The gasket 6 is attached so that the cap peripheral portion 7a can be brought into contact with and separated from the O-ring.
Therefore, the blower-type folding chair 1A of the main body air supply / discharge type according to the present invention formed in this way is initially closed by rotating the cap 7 forwardly to close the main body 2 molded in an enlarged form. Installed so as to support body load by sealing, and set the grounding stay 8 for expanding the grounding area of the bottom plate to improve the stability at the time of sitting. After opening the pores 5a and compressing the main body 2 to discharge air, the cap 7 is rotated forward and tightened so that the internal negative pressure state can be maintained with the thickness when the main body 2 is folded down being 2, 0-2, 5CM Can be formed. The head cap 7 is formed to be flush with the peripheral portion of the bottom surface 2a when the head 7b is tightened. Alternatively, although not shown, the grounding stay 8 can be formed so that the stay is provided with half grooves on both sides of the bottom plate and can be pulled out rearward.
Therefore, the air supply / exhaust bellows type portable chair 1A is thus sealed when the main body is expanded by the air when the folded chair at the time of storage starts to suck air from the vent hole 5a by the instantaneous cap forward / reverse half rotation operation. Moreover, sealing and opening when the main body is compressed, and the height of the chair can be easily adjusted, and the mouth 7 can be blown with the mouth only by a slight forward / reverse one-handed half-turn operation with both hands attached to the main body without removing the cap 7. The chair can be used without inflating. At the same time, this portable chair 1A is lightweight and compact, so it can be carried on a daily basis, and is also useful for any rest when traveling or taking a walk. But you can use it. In addition, the blow molded chair formed as described above can be provided with a round shape or a triangular shape in the plan shape of the main body, and at the same time, the trunk portion is trapezoidal or reverse in addition to the box shape cylindrical shape. It can also be formed into a three-dimensional design such as a trapezoid.

Further, as shown in FIG. 7, the portable folding chair 1B with the bellows type air supply / discharge means 3 of the present invention has a seat surface 9A of the main body 9 having a substantially square shape on its upper surface. The vertical seat surface 10 divided into two in the center in the sitting position is fitted and mounted so as to be slidable in the lateral direction, and can be used to expand the optional seating surface. A plate-like shape in which a paragraph difference B is provided at a predetermined position on the left and right sides from the center to form a center upper step seat surface 9a and a left and right lower step seat surface 9b, and projecting vertically downward on the front and rear outer edges of the lower step seat surface 9b at the left and right steps A stopper 9c is arranged, and a flange 10a is arranged at the lower part of the periphery of the two-sided saddle-shaped seat surface 10, and a hook 10b for locking is provided at the center-side cut portion to provide a stopper 9c. Horizontally slidable with a backup mechanism C that can receive and lock And when the saddle-shaped seat surface 10 falls from the upper seat surface 9a to the lower seat surface 9b, it is formed so as to be flush with the upper body seat surface 9a of the main body, and air is applied to the bottom plate 9C of the main body 9. The folding chair 1B can be formed by arranging the supply / discharge means 3.
The folding chair 1B fitted with the saddle-shaped seat surface 10 that can be extended and contracted in the left-right direction is provided with a planar shape of the seat surface 9A of the main body in a small size of, for example, a width of 15 CM and a length of 16 CM. For example, the length of the surface 9a is 8CM, the left and right lower seat surfaces 9b are each provided with 4CM molding, and the upper surface 9A is provided with the split saddle-shaped seat surface 10 having a length of about 8CM. After being fitted with a hook 10b, when seated, it can be slid in the left-right direction to expand to a seating surface with a total length of about 24CM. At this time, the saddle-shaped seat surface 10 moved to the upper seat surface 9a and the lower seat surface 9b of the main body 9 is fixed by a backup mechanism C in which both ends 9c and 10b mesh with each other as shown in FIG. The hook 10b of the meshing portion of the saddle-shaped seat surface 10 is pushed out inward and laterally to reduce the size to about 16CM of the original main body seat surface 9A. Reduced, loosened the cap 7, opened the opening 5a, compressed the body 9 up and down, vented the inside, tightened the rear cap 7 to maintain a negative pressure, and can be housed in a compact size for convenience Can be further increased. Of course, the ground contact surface expansion stay 8 can be arranged on the bottom plate. Indoor use is also possible. In the present invention, although not shown, an air supply / discharge device can be provided on the upper seat surface.

  Further, as shown in FIG. 9, the folding portable chair 1C of the present invention has a seat surface 11A, 11B made of hard resin or the like, and a flange 11a on the periphery, and a planar shape substantially square-shaped inverted bowl with a predetermined depth. It is provided in a mold and arranged in parallel, and is mainly formed by providing a pressure receiving block 11b at the central adjacent flange portion, and a connecting mechanism D using the rotating shaft 12 is provided at the adjacent adjacent portion, and the lower half-rotation joint is formed. The seats 11A and 11B are provided in a foldable manner, and the back surfaces of the seats 11A and 11B are formed of four light-bendable legs 13 made of aluminum light alloy or the like, for example, the channel material 13A is used in the upper part, and the rectangular pipe is used in the lower part. A hinge pin 14 is attached to each of the upper part and the middle part using 13B or the like so that it can be bent in two steps, and the leg 13 is bent and reduced, and the back and forth directions XY on the back surface of the seating surfaces 11A and 11B Is a deformed M-shaped E that becomes asymmetric For this reason, four pairs of holders 15 are arranged with an angle H as shown in FIGS. 10 and 12 on the base F of the flanges 11a on the back surfaces of the seating surfaces 11A and 11B, and the fitting holes 15a are formed. In addition, the lower portion is provided with a notch 15b slightly narrower than the fitting hole at the lower portion, and the fitting hole 15a is large on both sides on the assembly side of the base G of the upper leg 13A as shown in FIGS. The plate-shaped adapter 16 is attached and is forcedly press-fitted into the fitting hole 15a of the holder together with the rotating pin 14, the adapter 16 is gripped by the restoring force of the holder 15, and can be prevented from falling. , 13B are formed so that they can be bent in and out. At this time, the adhesive can be reliably fixed by applying an adhesive to the fitting hole 15a of the holder 15. Although not shown, the upper and lower legs can be accommodated in the rear surface of the seating surface by using a square pipe having a different diameter and extending in a vertically sliding manner via a knock pin or the like. Alternatively, reinforced resin or the like can be used for the legs 13, and an aluminum molded product can be used for the seating surface. In addition, the seating surface can be provided alone. The arrangement of the legs can also be referred to as a modified W shape. The main foldable chair 1C formed in this way has, for example, an inverted saddle-shaped seat surface having a depth of 15MM, which is divided into two parts, such as a hard resin having a width of 15CM and a length of 22-24CM, between the center flanges. A joint mechanism D is arranged on the back of the seating surface so that it can be folded. In addition, a leg with two-stage bends, for example, an upper leg of 15CM and a lower leg of 14CM is assembled in the back of the seat, and the legs are extended. The chair has a total leg height of 27-28CM and is formed so that a suitable seat height can be secured and can be grounded at a wide angle. After folding, the leg 13 is seated on the seating surfaces 11A and 11B as shown in FIG. An age group that can be assembled and stored in a simple operation by reducing the size to about 15CM in width, about 12CM in length, and about 3CM in thickness. Travel, walks, shops in the outdoor era regardless of clothes and clothes It is used outside of the event or the like it is possible to increase the very convenience. In this folding chair, in order to enhance stability during use, the pressure receiving block 11b is arranged on the left and right seating surface connecting contact flange surfaces as shown in FIGS. 9 and 10, and the tension stay on the back surface of the seating surface as shown in FIG. A reinforcing tension stay 17 can be disposed between the holder 18 and the leg 13 intermediate hinge pin 14. And although not shown, a flange can also be arranged between the seating surfaces 13A and 13B.

The perspective view at the time of expansion which shows the air supply / exhaustion bellows folding chair of this invention. It is a front view of a chair same as the above, and shows the state of an assembling configuration in which the body part is reduced on one side and the supply / discharge device is arranged in the concave groove at the bottom. The partial expanded sectional view of an air supply / discharge device same as the above. The figure of the bottom face of the chair shows a state of wearing a concave groove with a predetermined width, a supply / discharge device, and a rotating grounding stay. The main body lower part side view which shows the mode of a grounding stay installation same as the above. The figure of a grounding stay same as the above. The whole perspective view of the bellows folding chair of the split saddle type extension seat surface system of this invention. It is partially cut away in the partial view of the back-up mechanism of the main body seat with a step and the split saddle type extension seat of the chair. The whole perspective view of the gassho folding chair of the present invention. It is a top view of the seat surface expansion | deployment of a chair same as the above, and it shows that the leg was folded by the back surface of the division | segmentation parallel connection seat surface, and it was distribute | arranged to the deformation | transformation M shape, and the pressure receiving block was distribute | arranged to the connection part. The figure which shows a mode that the different diameter channel of a leg and a square pipe formed the hinge mechanism with the rotating pin, and attached the adapter to the leg base. FIG. 3 is a partial cross-sectional view showing a seating surface in the above-described divided parallel arrangement, in which a leg mounting holder is arranged on the back surface base. The figure of the adapter for holder fitting same as the above. The figure which shows the mode of the extension stay installation for a chair same as the above. Fig. 2 is a front cross-sectional view of the folding chair with the same palms as above, and shows a state in which the bending legs are housed in the back of the seating surface.

DESCRIPTION OF SYMBOLS 1A Air supply / discharge folding portable chair 1B Same type extended seat surface portable chair 1C Leg folding portable chair 2 Main body of 1A 2A Same bellows-like body 2B Same seat surface 2C Same bottom plate 2a Bottom surface 2b Grounding stay Fitting hole 3 Air supply / discharge means 4 Smooth concave groove 5 Cylindrical screw opening 5a Ventilation hole 6 Gasket 7 Cap 7a Same peripheral edge 7b Same head 8 Ground stay 8a Shaft core 9B Main body 9A Same seat Surface 9B Same body portion 9C Same bottom plate 9a Same upper step seat surface 9b Same lower step seat surface 9c Stopper 10 Two split saddle seat surface 10a Flange 10b Hook 11A, 11B Parallel seat surface of 1C 11a Same flange 11b Pressure receiving block 12 Rotating shaft 13 Bent legs 13A Upper leg 13B Lower leg 14 Hinge pin 15 Holder 15a Fitting hole 15b Notch 16 Adapter 17 Tension stay 18 Tension stay holder A Center line B Paragraph difference C Backup mechanism D Connection mechanism E Deformed M-shaped F Leg assembly base on the back of the seat surface G Leg assembly base H Holder mounting angle X-Y Longitudinal direction

Claims (3)

  It relates to a portable chair for resting indoors and outdoors, and is made of a flexible resin so that it can be vertically expanded and contracted by a hollow box type internal air supply / exhaust type with a predetermined height. (Hereinafter referred to as a seating surface) and a bottom plate having a substantially square shape in a planar shape, and the periphery of the intermediate body portion is formed in a horizontal bellows shape, and the air supply / discharge means mainly in the bottom plate bottom center in one direction. A groove having a predetermined width passing therethrough in a gently concave shape (hereinafter also referred to as an inlay) and having an externally threaded cylindrical mouth portion projecting externally to the concave portion, a vent hole having a predetermined diameter in the screw portion body, and A ring-shaped elastic gasket at the base, and a cap at the top so that the inner air can be opened in an air-tight manner, and at least the rear grounding area arbitrarily expanding jig (hereinafter referred to as a grounding stay) is provided on the bottom plate. A detachable seat such as a downward pendulum or horizontal slide type , Upper body load stability enhancement can be configured air supply and discharge folding portable chairs.   In order to form the upper seat surface of the main body of the air supply / discharge vertical expansion / contraction-type portable chair so that it can be arbitrarily enlarged, a predetermined paragraph difference is provided in the outer direction of the predetermined position on the left and right sides of the seat surface in the vertical direction. Forming an auxiliary seating surface divided into left and right parts on the entire seating surface, a flange having a predetermined depth in the downward direction on each of the three peripheral edges, and an inward direction at the flange end A split seating surface (hereinafter also referred to as a saddle type seating surface) provided with a lock fitting mechanism (hereinafter referred to as a hook) is fitted and mounted so as to be horizontally slidable and expandable. A downward projection plate (hereinafter referred to as a stopper) is arranged on the portion so as to be engageable with the saddle type seating surface hook (hereinafter also referred to as a backup mechanism), and the left and right enlarged saddle type seating surface The folding device according to claim 1, wherein the folding seat is configured to be flush with the upper seat surface and to be housed in a reduced size. Only type portable chair.   The portable chair is provided in parallel with a substantially rectangular seat surface made of hard resin or the like, mainly with each peripheral lower flange (hereinafter also referred to as an inverted saddle-shaped seat surface) divided into the center left and right of the seat position. Arranged and arranged with a coupling mechanism in the center adjacent part so that it can be folded inward (hereinafter also referred to as a palm type), and on the back side of the both seating surfaces, four legs of variable length are arranged so that it can be stowed out The folding chair is formed by fitting four pairs of projecting members (hereinafter referred to as holders) with a lower notch at a predetermined position (hereinafter referred to as a seat base) when the left and right seat surfaces are flattened. A hole is provided and arranged at a predetermined angle, and the four legs are arranged in the holder so that the figure when retracted is a deformed M-shape that is asymmetric with respect to the longitudinal direction of the sitting position when the seat is deployed. And plate-like ring members (hereinafter referred to as adapters) on both sides of the assembly side end (hereinafter referred to as leg base). The seating surface joint-folding type is constructed by attaching a tension stay for stabilizing the grounding of the legs, and assembling to make a half-turn and wide-angle grounding using a rotating pin. Portable chair.

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