JP4743675B2 - Folding umbrella - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a folding mechanism in a two-stage folding umbrella.
[0002]
[Prior art]
In the conventional two-stage folding umbrella, when an umbrella that has been unfolded is folded, it is necessary to perform an operation of folding the umbrella bone one by one and then fold the umbrella cloth.
Since this operation is performed after being used in the rain and getting wet, it is troublesome to wet hands, etc., and it is often carried around with the umbrella closed, or stored as it is. Then, even when carrying around, the convenience as a folding umbrella was lost, and it was inconvenient.
[0003]
On the other hand, there is a structure that folds the umbrella using the spring force of the spring as a structure that folds in three stages and realizes a mechanism that folds the umbrella bone with the spring when folding. Since the wet surface of the umbrella cloth is outside, the hands and clothes that touched the umbrella cloth will get wet, and the umbrella bone folded in three layers overlaps with the mechanism loaded with the spring and is bulky, There is a difficulty in impairing the convenience of the compact corner.
[0004]
In a folding umbrella, it is sufficient if the umbrella bone can be simply unfolded and folded by opening and closing the umbrella, but a Western umbrella with an umbrella cloth stretched on the umbrella bone is stretched with the umbrella bone in the opened state. The formed umbrella cloth has a function to bend the umbrella bone by its tension and keep the shape in its open state robust. This effect is the same even in a folding umbrella. Therefore, if the folding mechanism of the umbrella bone is operated in conjunction with the opening / closing operation of the umbrella, this tension is applied during the opening / closing operation of the umbrella. It exerts a strong resistance to the folding mechanism, and when the umbrella is opened, it can be deployed with the upper half constricted, and it can also interfere with smooth operation by giving strong resistance to the interlocking mechanism when folding. Become.
[0005]
In other words, the umbrella cloth is not a flat circular shape, but is composed of a curved surface that is three-dimensionally curved, while the umbrella framework is a shape in which the radially expanded umbrella bone is linearly extended. When the umbrella is open, the circumference drawn by the tip of the umbrella bone tip is larger than the circumference of the umbrella cloth at the periphery. For this reason, in the state where the umbrella is opened, the tip of the umbrella bone is squeezed from the periphery to the expanded umbrella cloth and is in a curved state. FIG. 10 shows a state in which the umbrella is opened without providing such an umbrella cloth and a state in which the umbrella cloth is stretched and deployed.
[0006]
Therefore, in the two-stage folding umbrella, when the umbrella is opened smoothly in conjunction with the operation of expanding the umbrella from the pre-folded state, the folding bone 40 is operated together with the operation of pushing up the parent bone by the fulcrum 30 as shown in FIG. However, when the distance between the adjacent tips R of the folding bone tips becomes equal to the preset width of the umbrella cloth between the tips, Since it becomes the maximum, the tip cannot be further expanded in the outer diameter direction by the tension of the umbrella cloth, and is curved.
[0007]
That is, ignoring the extension of the umbrella cloth and the like, when the outer periphery of the tip to which the umbrella bone is deployed and the umbrella cloth is fixed is equal to the outer periphery of the umbrella cloth in FIG. However, with respect to the angle α formed between the umbrella shaft 10 and the main bone 20 and the angle γ formed between the umbrella shaft and the folding bone 40 at this time, the angle β formed between the folding bone and the main bone has a relationship of β = α + γ. is there. And if there is a force acting in the direction of the umbrella axis from the tip R to the support bone, such as the tension of the umbrella cloth, γ will be applied in the opposite direction depending on either ± from 90 °. If the angle is less than 90 °, the tension of the umbrella cloth works in the direction of pulling back the tip of the folded bone, the folded bone is folded, and if γ is larger than 90 °, it acts in the direction of opening outward.
[0008]
Therefore, in order to unfold smoothly by opening the umbrella from the folded state, γ must exceed 90 ° in advance at this point. In addition, when the umbrella is folded, the reverse is true. However, since the tension of the umbrella cloth actually acts only in the direction in which the umbrella is folded and folded, the tension of the umbrella cloth is not a problem.
Furthermore, in the operation of unfolding and folding such a folding umbrella, the folding bone on which the umbrella cloth is stretched needs to be folded by rotating 180 degrees with respect to the parent bone. For this reason, when trying to rotate the folding bone with a simple crank mechanism, there is a problem of upper and lower dead points in which the direction of the force operated at both ends of the rotation operation is opposite, and the initial operation to open and close the umbrella It becomes difficult.
[0009]
[Problems to be solved by the invention]
In view of the above problems, the present invention allows a two-stage folding umbrella to be smoothly opened, narrowed and folded in conjunction with the opening and closing operation of the umbrella by a sliding operation of the lower rocker without losing its characteristics. A structure that can be used.
[0010]
[Means for Solving the Problems]
The present invention provides a two-stage folding umbrella that is provided with a folding bone that is pivotally connected to the distal end portion of a main bone, and that is connected to a lower bone and a main bone so as to be rotatable, and that is opened and closed by a sliding operation of the lower rocker. In
The link mechanism that pivotally attaches one end of the driving bone that rotates the folding bone to the main bone side extension of the joint point with the parent bone of the folding bone expands the rotation of the support bone or the main bone by the sliding operation of the lower rocker Rotate the folding bone and open the umbrella so that the angle of rotation is such that the angle between the folding bone and the umbrella shaft exceeds 90 ° in advance before the tension of the umbrella cloth acts on the tip of the folding bone. It is a two-stage folding umbrella.
[0011]
And as a mechanism for operating the drive bone that forms the link mechanism, the drive bone is pivotally attached in the middle of an auxiliary bone that connects the parent bone and the support bone and is slidable with respect to the support bone,
Alternatively, the support bone is configured to be bent or bendable, and the drive bone forming the link mechanism is pivotally attached to a position on the parent bone side, or the link mechanism is The drive bone to be formed is pivotally attached to a fixed roll provided at the lower part of the support bone or the upper roll, and the operation length of the drive bone accompanying the drive operation of the folded bone is adjusted as a structure in which the drive bone can be expanded and contracted. Is.
[0012]
Further, in these structures, the driving bone is made of a material having elasticity, or the elastic member is incorporated in the driving bone or provided separately, so that the umbrella is opened by opening the umbrella at least after the opening operation. It is a two-stage folding umbrella that stores repulsive force and facilitates initial operation when closing the umbrella by the repulsive force.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The folding structure of the present invention and its operation mode will be specifically described below with reference to the drawings. In each figure, the numbers shown in parentheses indicate procedures for opening and closing the umbrella, and are indicated by (1), (2),... In the order of opening the umbrella.
In FIG. 1, an umbrella bone is provided so as to be able to rotate radially via a connection point P ₃ around the upper rocker 11 at the upper end of the umbrella shaft 10, and the umbrella bone is a master bone 20 and a master bone tip 21 of the master bone from the center. in through the connecting point P ₁ consists folded bone 40 provided rotatably, through each and the lower runner 12 slidably provided umbrella shaft ribs connecting points P _4, P ₂ supported The structure is connected to the bone 30 so as to be rotatable, and the structure for opening and closing the umbrella bone by the vertical sliding operation of the lower rocker is the same as the conventional one.
[0014]
In the present invention, the folding bone 40 that is pivotally connected to the distal end portion of the main bone 20 is rotated by the drive bone 50 that is arranged substantially parallel to the main bone, so that the folding bone of the umbrella bone is opened when the umbrella is opened. Before the tension of the umbrella cloth comes to work at the tip, the folding bone is expanded in advance to a sufficiently large angle so that the expansion of the umbrella is prevented from being hindered by the tension of the umbrella cloth and can be opened and closed smoothly. To do.
[0015]
FIG. 1 shows an outline of the structure, which is driven via a connecting point Q ₁ to a main bone side extension portion of a folded bone that is rotatably provided via a connecting point P ₁ to a main bone tip 21 at the leading end of the main bone. connecting the bone 50, whereas rotatably connected to a connecting point P ₅ at one end to the ribs, the drive to the auxiliary bones 33 which are slidably coupled to the other end支骨(see FIG. 4) formed by pivotally connected to the other end of the bone in Q _2. In the present invention, this drive bone is operated in conjunction with the movement of the fulcrum accompanying the up and down sliding operation of the lower rocker to control the rotation angle of the folded bone.
[0016]
FIG. 1 shows a state in the middle of opening and closing the umbrella. As described above, in the so-called Western umbrella, the tension of the umbrella cloth acts on the tip R in the process of opening the umbrella, and the tip R and the umbrella shaft 10 are moved. Therefore, if the folding bone 40 is not rotated sufficiently before the above tension starts to act, the parent bone and the folding bone will be V-shaped and the umbrella can be opened. Disappear.
FIG. 1 shows an opened state in which such a tension starts to act. When the umbrella is further opened thereafter, the above tension acts as an aid for opening the folded umbrella. For this reason, even if a repulsive force that pushes back the folded bone is applied as will be described later, the umbrella can be smoothly opened and deployed as shown in FIG.
3 (a) to 3 (e) are enlarged views showing a connection mode of the main bone 20, the folding bone 40, and the driving bone 50, and the rotation of the folding bone and the form of the repulsive force acting at that time. An example is shown. The master bone 20 has a U-shaped cross-sectional shape and is designed to make the structure compact by housing the drive bone 50 that opens and closes the umbrella in the recess.
[0017]
Based on FIGS. 3 (a) to 3 (e), the rotating action of the folded bone and the effect of the repulsive force will be described.
Figure 3 is folding epiphysis device 41 is provided in the folding bone end (a), the coupled in connecting point P ₁ on the inside of the main rib tip 21, also driven bone 50 folded epiphysis It is connected to the folded bone end tool at Q1 inside the tool. With this configuration, Q ₁ is rotated on a semicircular orbit about P ₁ by a driving operation substantially parallel to the parent bone of the driving bone, and the folding bone is rotated.
Further, as shown in FIG. 3 (c), when the folding bone is rotated and the umbrella is deployed, it is prevented from rotating clockwise further in the figure by hitting the distal end of the master bone tip 21. It is made not to be completely in line with it, and the initial operation when closing the umbrella is made easy. Although the distance between P ₁ and Q ₁ is assumed to 3 to 6 mm, since these conditions are those vary by the size and shape of the umbrella, there is no intention to be bound on the design range.
[0018]
In this example, a spring wire such as a piano wire is used for the drive bone 50 and is bent appropriately in the vicinity of the connection point Q ₁ , and this is used as the drive bone bending portion 51. Folding bone end member 41 is formed to have a U-shaped cross section as shown in FIG. 3 (d), when connecting the drive bone via a shaft passing through Q _1, is a folding bone as shown in FIG. 3 (e) constant When the rotation angle is reached, the end edge portion is in the vicinity of the drive bone bending portion. FIG. 3B is the same state as FIG. 3E, and when the folding bone 40 is rotated from the state of FIG. The force acts so that the entire drive bone rotates around the connection point P _1, and as a result, the drive bone is gently curved and bent on the left side of the drive bone bending portion as shown in FIG. 3C. Accumulate repulsive force.
[0019]
In the present invention, as described above, since the tension of the umbrella cloth acts as an aid for opening the folded bone at the stage of opening the umbrella as described above, when the umbrella is further opened from the state of FIG. The folded bone is rotated against the repulsive force by tension to push open the umbrella and bend the drive bone to reach the state shown in FIG. FIG. 3C shows a state in which the folded bone is expanded and the umbrella is fully opened.
On the other hand, when closing the umbrella from the state of FIG. 3C, the restoring force by the stored repulsive force assists the initial movement operation of the drive bone and rotates it in a direction to fold the folded bone to a certain angle. Since the state shown in FIG. 3 (b) is reached, the smooth driving operation by the lower rotation can be performed after the state of the top dead center at the time of initial movement is removed.
When a thin spring wire is used for the drive bone, the protrusion of the spring wire is prevented by covering the open surface of the U-shaped cross section of the main bone as shown in FIG. It is desirable to add a drive bone retainer 22 that does.
[0020]
Next, a state where the umbrella is folded will be described with reference to FIG.
When the line segment P ₁ Q ₁ is parallel to the drive bone 50 in the folded state of the umbrella in FIG. 3A, even if a force is applied to the drive bone and the folded bone is pushed to the right in the figure, the folded bone is a so-called crank. Since it corresponds to the top and bottom dead center of the mechanism, the force in the direction of rotation does not work, and it is difficult to maintain an unstable and properly folded state.
If the position of Q ₁ is set slightly on the lower side of the figure and the line segment P ₁ Q ₁ and the drive bone are designed to form a slight angle (even about 5 °), this will have an effect on the stability of the above-mentioned folded bone. However, when the umbrella is opened, Q ₁ in FIG. 3 (c) comes to the upper side in the figure and this time, the point of action of the drive bone when closing the umbrella comes to the opposite side, which is a big obstacle. Become.
[0021]
The present invention uses the repulsive force of the driving bone stored when opening the umbrella as described above, and rotates the folding bone in a direction to fold the folding bone up to a certain angle at the start of the initial motion operation when folding the umbrella. In order to escape from the dead center, it is possible to give a margin to the position setting of Q ₁ as described above.
As shown in the following examples, the means for increasing the rotation angle of the folding bone when the folding bone is opened by the driving bone can have various structures. The influence of the tension of the umbrella cloth can be eliminated. At the same time, the tension of the umbrella cloth is used to store the repulsive force at the time of opening the umbrella. By incorporating an acting spring or the like, the initial operation at the time of folding can be made smooth.
[0022]
【Example】
Hereinafter, FIGS. 4 to 8 show structural examples for the purpose of rotating the folded bone sufficiently large until the tension of the umbrella cloth acts on the tip in the process of opening the umbrella. The above-mentioned purpose is to sufficiently fold the bone with respect to a certain rotation angle of the main bone (∠P ₁ P ₃ P _{4 in} FIG. 1) or the rotation angle of the fulcrum (∠P ₁ P ₂ P ₄ in FIG. 1). This can be achieved by a large rotation.
In a standard two-stage folding umbrella, it is a guideline that the folding bone is rotated by 140 ° or more when the rotation angle of the main bone is 50 ° or less (or the rotation angle of the fulcrum is 100 °). Of course, the above guidelines can be relaxed depending on the design of the umbrella.
Example 1.
FIG. 4 illustrates these example structures of the present invention.
A connection point P ₅ is provided at a site separated from the connection point P ₂ of the main bone 20 with the support bone 30 by an appropriate distance on the distal end side of the main bone, and one end of the auxiliary bone 33 is rotatably connected thereto. with the rotation and slidably coupled to支骨as a connection point Q ₃ the other end of the auxiliary bones, the distance between the connecting point Q ₃ and the connection point P ₅ and the connection point P ₅ and the connection point P ₂ the auxiliary bones arranged formed by setting appropriately larger than the distance, the driving operation by connecting one end of the drive bone rotatably here the connecting point Q ₂ is provided to the appropriate site of the auxiliary bones .
[0023]
In the process of opening the umbrella, the support frame 30 rotates around P ₂ in the order of (1), (2), (3), (4) in the figure.
Along with this, the auxiliary bone 33 also rotates about P ₅ via Q ₃ , and the driving bone 50 connected to Q ₂ drives and operates Q ₁ (see FIG. 3) of the folded bone end tool. When the operations of Q ₁ and Q ₂ are matched, the distance P ₅ Q ₂ is almost equal to the distance P ₁ Q ₁ (see FIG. 3), and the rotation angle of Q ₂ (∠P ₁ P ₅ Q ₂ ) is folded. It is almost equal to the bone rotation angle. Therefore, the rotation angle of the folded bone can be increased with respect to the rotation angle of the support bone. It is also clear that the above object can be achieved by increasing or decreasing the rotation angle of Q ₂ by changing the distance P ₅ Q ₃ according to the folding structure of the umbrella.
[0024]
FIG. 4B is a manufacturing example of the auxiliary bone 33 and can be realized by processing a wire such as a piano wire. The connecting point Q ₃ can be slid while rotating on the fulcrum by setting its inner diameter slightly larger than the outer diameter of the rod-like fulcrum 30.
Further, by forming the driving bone and the auxiliary bone with these thin materials, the auxiliary bone can be stored together with the driving bone in the U-shaped parent bone when the umbrella is folded.
[0025]
Example 2
FIG. 5 shows still another structural example, in which one end of the main support 31 is connected to one end of the sub-support 32 with the connection point P ₄ to the lower rocker and the other end of the main support to the connection point Q _4. Further, the other end of the sub-spindle is rotatably connected to the connection point P ₂ with the parent bone, or the rotation angle between the main and sub-supports is limited at the connection point Q ₄ . linked to, a structure in which a connecting point Q ₂ on the appropriate sites of the sub支骨provided for driving operation and pivotally connected to one end of the drive bone here.
When the auxiliary fulcrum rotates about P ₂ , the folding bone is driven and operated via Q ₁ (see FIG. 3) by the driving bone 50 connected to Q ₂ .
Further, assuming a line segment P ₂ P _4, the line segment P ₂ P ₄ by the operation of the lower runner is rotated about the P _2, ribs 20 are rotated. In the process of opening the umbrella, the main support pushes Q ₄ in the axial direction to rotate the sub-support, and the processes (1) to (2) in the figure are performed. At this time, Q ₄ hits the umbrella shaft (10 in FIG. 1) and the parent bone rotates slightly, but substantially only the folded bone rotates by a certain angle.
Remains at connecting point Q ₄ main unless limit the rotation angle of the main支骨and sub支骨支骨is substantially parallel to the ribs, the auxiliary支骨is rotated, the bone folding while ribs is closed It opens and then the parent bone rotates to open the umbrella.
[0026]
This example is a restricted from α to fill the turning angle of the main支骨and sub支骨in Q ₄ in FIG within between beta, the drive for the lead folding bone Process (3) The operation ends. After the process (3), the sub-spindle is prevented from rotating by the driving bone, and only the main support pivots about Q ₄ to rotate the parent bone, and reaches the process (4) to open the umbrella. The operation is complete.
When closing the umbrella, the process is almost reversed. In this example, the rotation angle of the folded bone can be almost arbitrarily limited by the set angle α, and the operations of Q ₂ and Q ₁ are naturally aligned, so the above object can be easily achieved. In this example, it is added that it is necessary to consider that the load relating to Q ₂ is maintained below a certain level via the drive bone.
[0027]
Example 3
FIG. 6 shows still another structural example.
In the figure, with respect to a connection point P ₂ between the support 30 and the main bone 20 and a connection point Q ₂ on the support provided in the vicinity thereof and a connection point P ₄ between the support and the lower rocker, the angle P ₂ Q ₂ P ₄ is connected so as to form a predetermined angle to place the connecting point Q _2, driven operating here the one end of the drive bone pivotally connected to.
In this example, the angle is made smaller and the timing of the driving operation is advanced so as to approach the above-mentioned standard. Therefore, the purpose is achieved by adapting the design of the umbrella to this structure. It is desirable to make the distance P ₁ Q ₁ (see FIG. 3) as small as possible so as not to be bulky when the umbrella is folded.
Further, if the connecting point Q ₂ and the driving bone can be rotated to the inside of the U-shaped master bone when Q ₂ goes around P ₂ , the design of the umbrella can be made compact. Furthermore, this example can drive the folded bone more effectively by using the expansion / contraction function described later.
[0028]
Example 4
FIG. 7, FIG. 8 (a), (b) shows still another structural example. In the example of FIG. 7, the driving bone 50 is connected to Q ₂ of the support frame 30, and Q ₁ (see FIG. 3) is driven.
A connection point Q ₂ is provided on the vicinity of the connection point P ₂ between the support frame 30 and the main bone 20 (see FIG. 7), or newly on the umbrella shaft in the vicinity of the connection point P ₃ between the main bone and the upper rocker. The fixed rocker 13 is arranged and a connection point Q ₂ is provided (see FIG. 8). One end of the drive bone is rotatably connected to any one of the connection points Q ₂ , and the connection point P ₂ is connected to the connection point P _2. by setting appropriately large distance between the distance or the connection connecting point P ₃ and Q ₂ and the connecting point Q _2, telescopic function to stretch the distance between both ends to the drive bone together and transmits the amplified driving operation 52 is added to compensate for the inconvenience of the consistency of both ends of the drive bone, and the drive operation is performed.
[0029]
In the structural example of FIG. 7, the distance between P _{2 and} Q ₂ is set to be reasonably large, thereby amplifying the driving operation and arbitrarily controlling the rotation angle of the folding bone to achieve the object. . In this case, if the distance between Q _{1 and} Q ₂ is fixed to a certain length, the operation of Q _{1 and} Q ₂ cannot be matched. Therefore, the expansion / contraction function 52 is added to the drive bone to compensate for the inconsistency.
An example of the structure of the expansion / contraction function will be described later. The expansion / contraction function can be expanded / contracted by the tension or pressure of a certain level or more with respect to its steady length, and it must be a structure that does not bend flexibly against pressure. .
[0030]
FIG. 8 shows an example in which Q ₂ is provided on the fixed rocker 13 arranged at the lower part of the upper rocker 11. A driving bone 50 is connected to Q ₂ and Q ₁ (see FIG. 3) is driven. FIG. 8 (b) is a schematic representation of FIG. 8 (a) and basically shows the same as FIG. 7 (P ₃ corresponds to P ₂ ). The total rotation angle of Q _{2 in} FIG. 8B is about 75 °, and the expansion / contraction function 52 requires a larger expansion / contraction distance.
[0031]
FIGS. 9A to 9C show structural examples of the expansion / contraction function. FIG. 9A shows a structure 521 in which the vicinity of the connection point Q ₂ is curved using a spring wire such as a piano wire for the drive bone. It can be applied when the expansion / contraction distance is less than 1 mm as a guideline, and is convenient when used in combination with the structure of Example 3 shown in FIG.
FIG. 9B shows a case where a spring wire material such as a piano wire is used for the drive bone and a coil spring 522 is provided in the middle. By reducing the outer diameter of the coil, the spring constant is reduced, the driving operation is stabilized, and the U-shaped main bone can be accommodated. If necessary, it is possible to prepare for inconvenient deflection through a reinforcing shaft inside the coil. This can be applied to a case where the extension distance is 4 mm or less as a guide, and is convenient for the structural example shown in FIG.
[0032]
FIG. 9C shows a state where the compression spring 522 is compressed as a compression coil spring 523 between the stoppers 524 fixed to the two drive bones 50 in an appropriately compressed state. Each pulling the Q ₁ side of the drive bone 50, Q ₂ side of the drive bone by the tip portion of the stopper spring 523 is contracted press is as shown in FIG. 9 (c1).
The spring 523 by Q1 side drive bone, Q ₂ side of the middle respectively the jostling drive bone stopper is contracted press again, becomes as shown in FIG. 9 (c1).
According to the structure of this example, the initial movement torque and the expansion / contraction distance can be set almost freely, and the expansion / contraction function of the drive bone is universal. Since the expansion / contraction distance can be set large (15 mm or more), it is useful for preventing failure when the folded bone is forcibly turned. In this example, a compression spring is used, but a similar function can be achieved with a tension spring.
[0033]
【The invention's effect】
According to the present invention, in the process of opening the two-stage folded umbrella, there is no need to crawl or open with particular force, the umbrella can be opened easily and smoothly, and the parent bone and the folded bone do not become V-shaped.
Also, when the umbrella is closed, the folded bone is smoothly folded in conjunction with the operation of the lower rocker, and the folded bone does not wobble in the folded state.
Since the wet surface is folded inward, the clothes are less likely to get wet and the trend is convenient. In addition, since the structure of the opening / closing mechanism is simple, robust, and easy to manufacture, it can be spread by drafting and can contribute to the industry.
[Brief description of the drawings]
FIG. 1 Folding umbrella of the present invention (deployment process)
[Fig. 2] Folding umbrella of the present invention (unfolded state)
FIGS. 3A to 3E are explanatory diagrams of a structure of a distal end portion of a main bone and a resilience mechanism of a driving bone. FIGS. 4A and 4B are structural examples of a driving mechanism (a) and auxiliary bones (b).
5 is another structural example of the driving mechanism. FIG. 6 is another structural example of the driving mechanism. FIG. 7 is another structural example of the driving mechanism. Example:
[Fig. 9] (a) to (c2) Telescopic mechanism used in the structural example of the drive mechanism [Fig. 10] Fig. 11 is an unfolding principle diagram of the umbrella. [Fig. 11] Fig. 11 is a folding mechanism diagram.
DESCRIPTION OF SYMBOLS 10 Umbrella axis | shaft 11 Upper rock 12 Lower rock 13 Fixed rock 20 Master bone 21 Master bone tip tool 22 Drive bone holder 30 Sponce 31 Main support 32 Secondary support 33 Auxiliary bone 40 Folding bone 41 Folding bone end tool 50 Driving bone 51 Driving Bone bending portion 52 Telescopic function portion 521 Bending portion 522 Coil spring 523 Compression coil spring 524 Stopper
P ₁ Parent bone, folding bone connection point
P ₂ Master bone, support joint point
P ₃ parent bone, upper loft
P ₄ fulcrum, lower rokuro connection point
P ₅ Parent bone, auxiliary bone connection point
Q ₁ Folding bone, drive bone connection point
Q _2- drive bone end connection point
Q ₃支骨, auxiliary bone attachment point
Q ₄ Main and secondary fulcrum connection points
R

Claims (2)

Ribs tip provided pivotally linked folding bone of, by connecting the pivotally支骨to the lower runner and ribs, the two-stage folding umbrella is opened and closed by sliding operation of the lower runner, said supporting Bone is bent or configured to be refractable, and the drive bone can be pivotally attached to the extension from the connection point of the folded bone toward the main bone, and the other end can be rotated to the main bone side of the support bone and pivotally constitute a link mechanism to perform a rotating operation of the folding bone enlarged rotation of支骨or ribs by sliding operation of the lower runner, bone fold the rotation angle when opening the umbrella A two-stage folding umbrella, wherein the angle between the folding bone and the umbrella shaft exceeds 90 ° in advance before the tension of the umbrella cloth acts on the tip. The drive bone is made of a material having elasticity, or a resilient member is incorporated in the drive bone or provided separately, so that repulsive force is accumulated in the operation by opening the umbrella at least after the opening operation. The two-stage folding umbrella according to claim 1, wherein an initial operation when closing the umbrella by a repulsive force is facilitated.

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