JP2006021026A - Folding umbrella - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding umbrella capable of flattening the folded state of being particularly effective in effectively increasing convenience for storage and carrying, without impairing the umbrella function such as the open umbrella size. <P>SOLUTION: First vertical grooves 34a and 34b are formed in left-right end parts of left-right wing parts of an upper runner 21 and a lower runner 22. First through-holes 35a and 35b are formed in a position crossing with the first vertical grooves of the respective runners, and second through-holes 36a and 36b are formed in a central side position from the first through-holes. In the upper runner 21, a master rib 41 positioned on the left and right in the first vertical grooves is individually pivoted by a support shaft member 37a arranged in the first through-holes, and the other master rib 41 is collectively pivoted by an annular support shaft wire 38a inserted into the second through-hole 36a. In the lower runner 22, a receiving rib 44 positioned on the left and right in the first vertical groove 34b is individually pivoted by a support shaft member 37b arranged in the first through-hole 35b, and the other receiving rib 44 is collectively pivoted by an annular support shaft wire 38b inserted into the second through-hole 36b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a foldable umbrella that can be folded into a flat shape, and more particularly to an effective one when applied to a three-fold foldable umbrella.

  5 and 6 show a configuration example of a conventional three-fold folding umbrella. First, as shown in FIG. 5, this type of folding umbrella includes an upper croquet 21 'fixed to the upper part of the telescopic middle rod 10' and a foldable master bone pivotally supported by the upper crochet 21 '. 40 ', a lower rocker 22' slidably guided by the middle rod 10 below the upper rocker 21 ', and a receiving bone 44 pivotally supported by the lower rocker 22' to support the parent bone 40 '. In the opened state, the main bone 40 ′ and the receiving bone 44 expand radially, while in the closed state, the parent bone 40 ′ is folded and the parent bone 40 ′ and the receiving bone 44 are 10 is converged substantially in parallel with 10.

  The middle rod 10 'is a telescopic type made up of a nested split pipe, and a tip 11 is attached to the tip (upper end) and a hand 12 is attached to the base end (lower end). Further, a repellent 13 for releasably locking the lower roller 22 'is provided at an intermediate portion near the tip (upper end).

  The master bone 40 ′ is formed into a three-fold type including an original master bone (also called a long bone) 41, a middle master bone 42, and a tip parent bone 43. A lower continuous rod (also referred to as a holding rod) 45 is connected to the receiving bone 44. The lower link 45, together with the original master bone 41 and the middle master bone 42, form a link mechanism that flexes and stretches the master bone 40 'in conjunction with the vertical movement of the lower roller 22'.

  A wire spring (also called a straight line for spring) 47 is bridged between the original parent bone 41 and the previous parent bone 43. The intermediate portion of the wire spring 47 is slidably locked to the intermediate portion of the middle master bone 42, so that a spring action (elastic function) is given to the bending and extending operation of the master bone 40 '.

  The original master bone 41 and the middle master bone 42 are configured using a metal (steel or aluminum alloy) member having a U-shaped cross section. The portion of the wire spring 47 that is movably locked to the middle master bone 42 is formed by bending an extending piece 421 that is integrally formed with the middle master bone 42 as shown in a partially enlarged view in FIG.

  In FIG. 5, reference numeral 51 denotes a protruding portion or extending portion called a dowel, and this dowel 51 is provided to form a rotatable connecting portion.

  FIGS. 6 (a) and 6 (b) show the main parts of the upper and lower rockers 21 'and 22', respectively. Longitudinal groove portions 52a and 52b which are formed by a boss portion and are directed in the radial direction with respect to the center rod 10 are disposed at equiangular intervals (60 ° intervals in the illustrated example).

  FIGS. 6 (c) and (d) are diagrams showing the relative positional relationship between the upper and lower lokuro of the conventional folding umbrella and the umbrella bone in the opened state and the closed state, respectively. As shown in d), the upper rocker 21 'and the lower rocker 22' are each provided with an annular pivot wire (one-turn wire) 54 that goes around the longitudinal groove portions 52a and 52b, The annular pivot wire 54 forms a common pivot that collectively pivots the original parent bone 41 and the receiving bone 44 in the longitudinal groove portion 32. As a result, in the opened state, as shown in (c), the main bone 41 and the receiving bone 44 expand radially, while in the closed state, as shown in (d), the main bone 41 and the receiving bone 44 are in the upper position. It is converged in a circle arrangement state around the rokuro 21 'and the lower rokuro 22'. In this case, although not shown in the figure, the three-fold type main bone 40 ′ is placed around the upper roll 21 ′ and the lower roll 22 ′ in a state where the original main bone 41, the middle main bone 42, and the front parent bone 44 are folded. Converged.

About the structure of the folding umbrella mentioned above, the whole or one part is described in the patent documents 1-5 shown below, for example.
JP-A-9-51811 Utility model registration No. 3070862 JP-A-9-84617 JP-A-9-51811 JP-A-8-80207

  As described above, in the conventional folding umbrella, when the umbrella is folded, the main bone 40 ′ and the receiving bone 44 are converged in a circle arrangement around the upper and lower crots 21 ′ and 22 ′. Further, the main bone 40 ′ is converged in a state where the original parent bone 41, the middle parent bone 42, and the previous parent bone 44 are folded. At the same time, an umbrella cloth (not shown) is folded around the upper roll 21 'and the lower roll 22' together with the main bone 40 '.

  For this reason, as shown in FIG. 4 (b), the folded state is a round shape that is thick and rounded into a cylindrical shape. Inconveniences such as forming a useless thickness space, unnecessarily inflating the bag, or locally pressing other contents in the bag are likely to occur. In addition, there is an inconvenience that it cannot be accommodated in a thin case.

  Here, the inventor has focused on the fact that flattening of the folded state is more effective than reducing the overall size of the folded state in order to increase the convenience of accommodation and carrying. It has been found that the overall miniaturization of the folded state is likely to be accompanied by a decrease in umbrella function such as reduction in the size of the opened umbrella, but the storage property in a bag or the like is not improved so much.

  However, in the folding umbrella having the conventional structure described above, the parent bone 40 'and the receiving bone 44 are folded around the upper rocker 21' and the lower rocker 22 'in a circular arrangement, so that the folded state Inevitably became a thick cylinder.

  The present invention has been made in view of the problems as described above, and the object of the present invention is to effectively increase the convenience of accommodation and carrying without impairing the umbrella function such as the size of an open umbrella. It is an object of the present invention to provide a folding umbrella that can be effectively flattened and can be flattened so that the pocket can be smartly accommodated in a chest pocket or the like without causing the pocket to unnecessarily inflate.

The means of the present invention is a folding umbrella characterized by comprising the following means (1).
(1) An upper rocker fixed to the upper part of the telescopic middle rod, a foldable master bone pivotally supported by the upper rocker, and a lower rocker slidably guided by the middle rod below the upper rocker And having a rib that is pivotally supported by the lower rocker and supports the parent bone, and in the opened state, the parent bone and the receiving bone expand radially, while in the closed state the parent bone is folded and the In the folding umbrella in which the main bone and the receiving bone are converged substantially in parallel with the center rod, the upper and lower lokuros are each formed with wings that project left and right from the middle position of the front and back surfaces of the flat block body. In addition, a first vertical groove is formed at the left and right ends of the left and right wings, and a first through hole is formed at a position intersecting with the first vertical groove of each lokuro and the first through hole. A second through hole is formed at a more central position. The main bones located on the left and right sides of the groove are individually pivotally supported by a support shaft member provided in the first through hole, and the other main bones are collectively pivoted by an annular support shaft wire passing through the second through hole. In the lower lokuro, the ribs located on the left and right in the first longitudinal groove are individually pivotally supported by a pivot member provided in the first through hole, and the other ribs are passed through the second penetration. A foldable umbrella characterized in that it is pivotally supported by an annular support shaft wire inserted through a hole.

In the above means, addition or combination of the following means is particularly effective.
(2) A relatively shallow second vertical groove is formed between the front and rear surfaces of the flat block body of each of the rockers and the wing portion, and the second vertical groove of the upper rocker has the above-mentioned An inner end of another master bone is located, an inner end of the other receiving bone is located in the second longitudinal groove of the lower loft, and adjacent to the second longitudinal groove of the upper and lower loft The folding umbrella according to (1), wherein a second through hole is formed.

(3) The middle rod is formed in a flat cross-sectional shape, and the upper and lower treads into which the middle rod is inserted are each formed in a flat and long shape with the left-right direction as the longitudinal direction. The folding umbrella according to (1) or (2), which is characterized.

(4) The center rod is formed in a flat cross-sectional shape, and the upper and lower crocuses into which the center rod is inserted are each formed in a flat elongated shape having the left-right direction as a longitudinal direction. The folding umbrella as described above.

(5) Uses a trifold type main bone having the original master bone, the intermediate master bone, and the front parent bone, and freely engages the intermediate portion of the wire spring bridged between the original parent bone and the previous parent bone to the intermediate portion of the intermediate master bone. It is a three-fold type folding umbrella that gives a spring action to the bending and stretching operation of the main bone by stopping, by bending a loop portion that goes around the middle main bone in the middle part of the wire spring, The folding umbrella described above, wherein the middle part of the wire spring is movably locked to the middle part of the middle bone.

(6) A lower continuous rod forming a link mechanism for bending and extending the main bone in conjunction with the vertical movement of the lower rocker is formed with a wire-like thin rod, and the wire-shaped lower continuous rod and the original main bone are The folding umbrella according to any one of (1) to (4), wherein the folding umbrella is rotatably connected via a dowel member.

  For example, it enables flattening in a folded state that is particularly effective for effectively increasing the convenience of storage and carrying without compromising the umbrella function such as the size of the open umbrella. It is possible to provide a folding umbrella that can be flattened and can be accommodated smartly without being inflated.

  FIG. 1 shows a framework structure of a folding umbrella constituting an embodiment of the present invention. FIG. 2 shows the structure of the upper and lower rolls that form the main part of the present invention.

  First, as shown in FIG. 1 and FIG. 2A, the folding umbrella according to the present invention is supported by an upper rocker 21 fixed to the upper part of the telescopic middle rod 10 and the upper rocker 21. A foldable master bone 40 (41), a lower croquet 22 that is slidably guided by the middle rod 10 below the upper crochet 21, and a pivot that is supported by the lower croro 22 to support the skeleton 40. In the opened state, the main bone 40 and the receiving bone 44 expand radially, while in the closed state, the main bone 40 is folded and the main bone 40 and the receiving bone 44 are connected to the center rod. 10 is converged substantially in parallel with 10.

  The middle rod 10 is formed by sequentially engaging five cylinders having different diameters in a telescopic manner, and a tip 11 is attached to the tip (upper end) and a hand 12 is attached to the base end (lower end). In addition, a repelling 13 is provided at an intermediate portion near the tip (upper end) for releasably locking the lower roller 22.

  The master bone 40 is formed in a three-fold type including an original master bone (also called a long bone) 41, a middle master bone 42, and a tip parent bone 43. A lower continuous rod 45, which is also called a bar, is connected to the receiving bone 44. This lower continuous rod 45, together with the original master bone 41 and the middle master bone 42, forms a link mechanism that flexes and stretches the master bone 40 in conjunction with the vertical movement of the lower rocker 22.

  A wire spring 47, also called a spring straight line, is bridged between the original parent bone 41 and the previous parent bone 43. The intermediate portion of the wire spring 47 is slidably locked to the intermediate portion of the middle main bone 42 so that a spring action is given to the bending and extending operation of the main bone 40.

  The original main bone 41 is formed using a metal (for example, steel or aluminum alloy) member having a U-shaped cross section, but the middle main bone 42 is formed of a wire-like wire material such as steel (or a thin rod such as FRP). Has been. This is because the parent bone 40 is bundled thinly and can be folded.

    The portion of the wire spring 47 that is movably locked to the middle bone 42 is formed by bending a loop portion 471 that wraps around the middle bone 42 in the middle of the wire spring 47 as shown in a partially enlarged view in FIG. It is formed. Thus, the intermediate portion of the wire spring 47 can be freely moved to the intermediate portion of the middle bone 42 without providing a locking portion on the side of the middle bone 42 and without requiring additional parts for locking. Can be stopped.

  Further, in the illustrated embodiment, the lower continuous rod 45 that forms a link mechanism for bending and extending the main bone 40 in conjunction with the vertical movement of the lower rocker 22 is formed of a wire-like thin rod. At the same time, the wire-like lower continuous rod 45 and the original master bone 41 are rotatably connected via a dowel member 46. Thereby, the main bone 40 can be further bundled and folded.

  In the figure, reference numeral 51 denotes a protruding portion or extending portion called a dowel, and this dowel 51 is provided to form a rotatable connecting portion.

  As shown in FIG. 2A, a boss portion 30a that pivotally supports the main bone 40 is formed on the upper rocker 21, and a cylindrical portion (sleeve) 23 is integrally formed below the boss portion 30a. Yes. In addition, a boss portion 30b that pivotally supports the receiving bone 44 is formed on the lower rocker 22, and a cylindrical portion (sleeve) 24 is integrally formed on the boss portion 30b. Both cylinder parts 23 and 24 are formed so as to be slidably fitted in a state where the lower roller 22 is pushed up to a position where it is lowered and locked by the repellent 13 (see FIG. 1). A clue cylinder portion 25 for moving the lower pocket 22 is integrally formed on the lower side of the lower block 22. The lower end of the clue tube portion 25 is locked by the repellent 13.

  As shown in the perspective view inclined in FIG. 2B, the boss portion 30a of the upper block 21 is a flat rectangular shape that protrudes left and right from the middle position between the front and rear surfaces 31a and 31a of the substantially flat rectangular block body. Wings 33a, 33a. Deep first vertical grooves 34a, 34a are formed at the left and right ends of both wing portions 33a, 33a. Also, first through holes 35a and 35a are formed in the vicinity of the tips of both wings at positions intersecting the first vertical groove. Shallow second vertical grooves 32a and 32a are formed between the flat rectangular block body and the wings protruding left and right, and the second wings are adjacent to the outside of the second vertical grooves. Through-holes 36a, 36a are formed. The wing portions 33a and 33a, the first vertical grooves 34a and 34a, the second vertical grooves 32a and 32a, the first through holes 35a and 35a, and the second through holes 36a and 36a are respectively the vertical centers of the boss portions 30a. It is formed symmetrically with respect to the plane. A flat middle rod guide hole 26 into which the middle rod 10 is inserted is formed in the cylindrical portion 23 below the boss portion.

  As shown in the perspective view of FIG. 2C, the boss portion 30b of the lower block 22 is in the middle of the front and rear surfaces of the rectangular flat block bodies 31b and 31b, like the boss portion 30a of the upper block 21. Flat rectangular wings 33b, 33b projecting left and right from the position, deep first vertical grooves 34b, 34b, shallow second vertical grooves 32b, 32b, first through holes 35b, 35b and second through holes Holes 36b and 36b are provided.

  Further, a middle rod guide hole 27 into which the middle rod 10 having a flat cross section is fitted is formed at the center of the cylindrical portions 24 and 25 integrally formed below the lower roller 22.

  Then, as is clear from the figure showing the relative positional relationship between the upper and lower croquets 21 and 22 and the umbrella bone in the state in which the umbrella of FIG. 3A is unfolded, the first vertical length of the boss portion 30a of the upper crochet 21 is deep. The upper ends of the main bones 41 positioned on the left and right of the six main bones 40 are inserted into the grooves 34a and are pivotally supported by pins 37a. In addition, the upper end portions of the four main bones 41 that are obliquely positioned among the six main bones 40 are partially inserted into the shallow second vertical groove 32a of the boss portion 30a, and are collectively bundled by the annular pivot wire 38a. Is pivotally supported. On the other hand, in the boss portion 30b of the lower rocker 22, the upper ends of the main bones 44 located on the left and right of the six receiving bones 44 are inserted into the deep first vertical groove 34b, and are pinned by the pins 37b. Each is pivotally supported. In addition, the upper ends of the four main bones 44 located obliquely among the six receiving bones 44 are partially inserted into the shallow second vertical groove 32b of the boss portion 30b, and the annular pivot wire 38b It is pivotally supported collectively.

  With the configuration as described above, the main bone 40 and the receiving bone 44 are radially deployed while being pivotally supported by the upper and lower rockers 21 and 22 as shown in FIG. . On the other hand, in the closed state, as shown in FIG. 3 (b), the parent bone 40 is folded, and a folded state is formed in which the parent bone 40 and the receiving bone 44 are converged substantially parallel to the middle rod 10. .

  In this folded state, as shown in FIG. 3 (b), the main bone 40 and the receiving bone 44 are converged at positions distributed to the left and right sides of the upper rocker 21 and the upper rocker 22. Accordingly, although not shown, the original parent bone 41, the middle parent bone 42, and the front parent bone 43 that form the parent bone 40 are also converged at positions distributed to the left and right sides of the upper rocker 21 and the upper rocker 22.

  As a result, as shown in FIG. 4 (a), the entire umbrella including the umbrella fabric is folded into a flat and thin shape having an expanded width only in the left-right direction, and the tip of the front parent bone 43 is a dish-like shape having an elongated rectangular parallelepiped shape. It is accommodated in the recess of the hand 12.

  In the above configuration, the first longitudinal groove portions 34a and 34b located at the left and right end portions of the upper and lower rockers 21 and 22 accommodate the inner ends of the two master bones and the two receiving bones, respectively. It is possible by using a common pivot shaft by the annular pivot wires 38a and 38b for the other parent bone and the receiving bone while individually pivoting by 37b.

  As described above, in the present invention, the upper block 21 and the lower block 22 are respectively formed with the wings 33a and 33b protruding left and right from the intermediate positions of the front and rear surfaces 31a and 31b of the flat block body. First vertical grooves 34a and 34b are formed at the left and right ends of the wing, and first through holes 35a and 35b are formed at positions intersecting with the first vertical grooves of the respective rockers and from the first through holes. Second through-holes 36a and 36b are formed at the center position, and in the upper rocker 21, the main bones 41 positioned on the left and right in the first longitudinal groove are individually separated by a support shaft member 37a provided in the first through-hole. While pivotally supporting, the other main bone 41 is collectively pivotally supported by an annular support shaft wire 38a inserted through the second through-hole 36a, and the lower rocker 22 is positioned on the left and right in the first vertical groove 34b. Bone 44 first For example, by pivotally supporting the other receiving bone 44 by an annular support shaft wire 38b inserted through the second through-hole 36b while individually supporting by the support shaft member 37b provided in the through-hole 35b. The flattening of the folded state, which is particularly effective for effectively increasing the convenience of housing and carrying without impairing the umbrella function such as the umbrella size, is enabled. Thereby, for example, by making the middle rod 10 extendable and retractable in five stages, flattening that can be accommodated smartly without causing the pocket to unnecessarily inflate is also possible.

  Also, relatively shallow second vertical grooves 32a and 32b are formed between the front and rear surfaces 31a and 31b of the flat block bodies of the respective rockers 21 and 22 and the wing portions 33a and 33b, and the upper rockers 21, the inner end of the other main bone 41 is located in the second longitudinal groove 32 a, and the inner end of the other receiving bone 44 is located in the second longitudinal groove 32 b of the lower rocker 22. In addition, since the second through holes 36a and 36b are formed adjacent to the second vertical groove of the upper and lower rockers, when the umbrella is folded, the inner end of the other umbrella bone also has the second vertical hole. It becomes accommodated in the grooves 32a and 32b, and the flat folding of the entire umbrella bone becomes easy.

  Further, the center rod 10 is formed in a flat cross-sectional shape, and the upper and lower pockets 21 and 22 through which the center rod 10 passes are each formed in a long shape whose longitudinal direction is the left-right direction. It is very effective in further promoting the thinning.

  Further, a trifold type main bone 40 having an original main bone 41, a middle main bone 42, and a front parent bone 43 is used, and an intermediate portion of a wire spring 47 bridged between the original main bone 41 and the front parent bone 43 is used as the middle main bone 42. In the three-fold type folding umbrella that is provided with a spring action for bending and extending the main bone by being movably locked in the intermediate portion, the middle main bone 42 is wrapped around the intermediate portion of the wire spring 47. By bending the loop portion 471, the intermediate portion of the wire spring 47 can be loosely locked to the intermediate portion of the middle main bone 42. With such a locking structure, the diameter of the original parent bone 41 can be reduced to a wire shape, which makes it possible to further reduce the folding shape of the umbrella.

  Furthermore, the lower continuous rod 45 that forms a link mechanism for bending and extending the main bone 40 in conjunction with the vertical movement of the lower rocker 22 is formed of a wire-like thin rod, It is very effective to further connect the master bone 41 with the main bone 41 via the dowel member 46 in order to further promote the thinning.

  As described above, the present invention has been described based on the typical embodiments. However, the present invention can have various modes other than those described above. For example, the main bone 40 may be other than the three-fold type.

  For example, it enables flattening in a folded state that is particularly effective for effectively increasing the convenience of storage and carrying without compromising the umbrella function such as the size of the open umbrella. It is possible to provide a folding umbrella that can be flattened and can be accommodated smartly without being inflated.

It is the abbreviated side view and partial expansion perspective view which show the frame structure of the folding umbrella which concerns on this invention. (A) is a side view which shows the principal part of the upper loft and lower lokuro of the folding umbrella which concerns on this invention, (b) is a perspective view of an upper lokuro, (c) is a perspective view of a lower lokuro. It is a figure which shows the relative positional relationship of the upper loft of the folding umbrella which concerns on this invention, a lower lokuro, and an umbrella bone, (a) shows an open umbrella state, (b) shows a closed umbrella state. (A) It is a perspective view which shows the folding shape of the folding umbrella which concerns on this invention, (b) is a perspective view which shows the folding shape of the conventional folding umbrella. It is the abbreviated side view and partial expansion perspective view which show the frame structure of the conventional folding umbrella. (A) And (b) is a fragmentary perspective view which shows the principal part of the upper loft and lower lokuro of the conventional folding umbrella, (c) The upper loft of the conventional folding umbrella, lower lokuro and opening of the umbrella bone It is a figure which shows the relative positional relationship in an umbrella state, (d) It is a figure which shows the relative positional relationship in the closed state of the upper loft of a conventional folding type umbrella, a lower lokuro, and an umbrella bone.

Explanation of symbols

10 Middle stick 11 Stone bump 12 Hand 13 Repelling 21 Upper roll 22 Lower roll 31a, 31b Front and rear faces
32a, 32b Second vertical groove 33a, 33b Wings 34a, 34b First vertical groove 35a, 35b First through hole 36a, 36b Second through hole 37a, 37b Support shaft member 38a, 38b Annular support wire 40 Parent bone 41 Original parent bone 42 Middle parent bone 44 Receiving bone

Claims (7)

  An upper rocker fixed to the upper part of the telescopic middle rod, a foldable master bone pivotally supported by the upper rocker, a lower rocker slidably guided by the middle rod below the upper rocker, In the open state, the main bone and the receiving bone expand radially while the main bone is folded, and in the closed state, the main bone is folded and the parent bone and the In the folding umbrella in which the ribs are converged substantially parallel to the center rod, the upper and lower rockers are each formed with wings that protrude from the middle of the front and rear surfaces of the flat block body to the left and right. A first vertical groove is formed at the left and right end portions of the left and right wings, and the first through hole is located at a position crossing the first vertical groove of each rocker and is closer to the center than the first through hole. A second through hole is formed at the position, and the upper slot is formed in the first vertical groove. The main bones located on the left and right are individually pivotally supported by a support shaft member provided in the first through hole, and the other main bones are collectively supported by an annular support wire that passes through the second through hole. In the lower rocker, the ribs located on the left and right sides of the first longitudinal groove are individually pivotally supported by a support shaft member provided in the first through hole, and the other ribs are supported by the second through hole. A foldable umbrella characterized by being pivotally supported by an annular spindle wire that is inserted through.   A relatively shallow second vertical groove is formed between the front and rear surfaces of the flat block body of each lokuro and the wing portion, and the other master bone is placed in the second vertical groove of the upper lokuro. An inner end of the lower rib is located in the second longitudinal groove of the lower loft, and the second longitudinal groove of the upper and lower loft is adjacent to the second longitudinal groove. The folding umbrella according to claim 1, wherein a through hole is formed.   The middle rod is formed in a flat cross-sectional shape, and the upper and lower treads into which the middle rod is inserted are each formed in a flat and long shape having the left-right direction as a longitudinal direction. The folding umbrella according to claim 1 or 2.   The hand which receives the front-end | tip of the said front bone in the state which folded the said main bone is formed in the rectangular dish shape which makes the said left-right direction a longitudinal direction, The any one of Claims 1-3 characterized by the above-mentioned. Foldable umbrella.   Using a trifold type main bone having the original master bone, the middle master bone, and the front parent bone, and locking the middle portion of the wire spring bridged between the original parent bone and the front parent bone to the middle portion of the middle master bone so as to be freely movable. Is a three-fold folding umbrella that gives a spring action to the bending and stretching operation of the main bone, and by bending a loop portion that goes around the middle main bone in the middle portion of the wire spring, The folding umbrella according to any one of claims 1 to 4, wherein the middle part is movably locked to the middle part of the middle parent bone.   A lower continuous rod forming a link mechanism for bending and extending the main bone in conjunction with the vertical movement of the lower rocker is formed with a wire-like thin rod, and the dowel member is connected to the wire-shaped lower continuous rod and the original main bone. The foldable umbrella according to any one of claims 1 to 5, wherein the foldable umbrella is pivotally connected to each other. The folding umbrella according to any one of claims 1 to 6, wherein the middle rod is formed by sequentially engaging five cylindrical bodies having different diameters in a nested manner.

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