JP3109961U - Multi-foldable bone assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-stage folding bone assembly capable of protecting an umbrella from wind or air pressure acting on an upper part of the umbrella.
A multi-stage foldable bone assembly adapted to be pivotably connected to a central shaft 1 of an umbrella having an umbrella C fixed to the bone assembly 2, wherein the bone assembly 2 includes the bone. The front bone 25 is formed on the outer side of the assembly 2 so as to be freely rotatable. The front bone 25 has a U-shaped groove 250 recessed in the longitudinal direction of the front bone 25. Is adapted to the radius of the umbrella C fixed to the bone assembly 2 and extends linearly in the radial direction, and the front bone 25 has a U-shaped cross section.
[Selection] Figure 3

Description

  The present invention relates to a multi-stage collapsible bone assembly having a U-shaped cross-section.

  A conventional multi-stage folding umbrella having a three-stage folding bone assembly 2 as shown in FIGS. 1 and 2 is an upper bone that is rotatably connected to an upper notch 20 formed at the top of the central shaft 1. 21, an extended bone 22 connected to the runner 3, which is connected to the upper bone 21 and is slidably held on the central shaft 1, and is rotatably connected to the upper bone 21 and expanded via the connecting bone 24. An intermediate bone 23 that is rotatably connected to the bone 22, and a tip that is rotatably connected to the upper bone 21 by a spring bone 26 that is rotatably connected to the intermediate bone 23 and juxtaposed to the intermediate bone 23. Bone 25.

  The conventional umbrella is stiff enough to maintain a beautiful umbrella shape such that the anterior bone 25 is formed by the umbrella fabric C secured on the bone assembly 2 so that it has a beautiful appearance when opening the umbrella. It has a circular cross section and has been generally made for about 100 years.

  However, the anterior bone 25 formed with a circular cross section has the following drawbacks.

  (1) When the tip bone 25 having a circular cross section is made of solid steel or a steel bar, it is too heavy to carry and store.

  (2) When the tip bone 25 having a circular cross section is made of a carbon fiber material, the hardness or rigidity thereof is sufficient, but in particular, in the umbrella industry for making a widely used umbrella product, Cost is expensive. Glass fiber reinforced plastic (FRP) is less expensive than carbon fiber but is too soft to be suitable for producing the tip bone.

  (3) When exposed to a particularly strong wind force (air flow W) as shown in FIG. 2, the air is guided to the corner between the umbrella C and the circular frontal bone 25 so that it cannot escape upward. (See letter “T” in FIG. 2), pressure builds up on the umbrella C and bone assembly 2 and easily flips the umbrella and bone assembly upward, thus degrading the function of the umbrella.

  In order to achieve the above object, the present invention provides a multi-stage folding bone assembly adapted to be pivotally connected to a central shaft of an umbrella having an umbrella fixed to the bone assembly, the bone assembly comprising: Has a tip bone formed rotatably on the outer side of the bone assembly, the tip bone has a U-shaped groove recessed in the longitudinal direction of the tip bone, and the U-shaped groove is a bone A multi-folded bone assembly characterized by being linearly extending in a radial direction in conformity with a radius of an umbrella fixed to the assembly and having a U-shaped cross section of the tip bone.

  According to the present invention configured as described above, the bone assembly is pivotably formed on the outer portion of the bone assembly, has a sufficiently rigid tip bone, and the U-shaped radially recessed portion of the tip bone is depressed. A strong wind or air flow is effectively guided outward in the radial direction through the groove, and the wind or air pressure acting on the upper part of the umbrella can be released, so that the umbrella can be protected.

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

  FIG. 3 is a view showing the state when the umbrella is opened, FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3, and FIG. 5 is a view showing the ball tip connected to the outer end of the forebone of the present invention. 6 is a cross-sectional view of the anterior bone of the bone assembly according to the present invention when exposed to strong wind force, and FIG. 7 is a cross-sectional view taken along line 7-7 of FIG.

  As shown in FIGS. 3-7, a preferred embodiment of the present invention includes a bone assembly 2 that is pivotally connected to a central shaft 1 of a multi-stage or three-stage folding umbrella. The number of folding stages of the umbrella of the present invention is not particularly limited.

  The bone assembly 2 includes an upper bone 21 rotatably connected to an upper notch 20 formed at the top of the central shaft 1, and a sleeve 11 rotatably connected to the upper bone 21 and disposed on the central shaft 1. Alternatively, an expansion bone 22 that is rotatably connected to the runner 3 that is slidably held on the central shaft 1 and a rotation bone 22 that is rotatably connected to the expansion bone 22, and rotates to the upper bone 21 via the connection bone 24. It has an intermediate bone 23 that is movably connected and a tip bone 25 that is rotatably connected to the intermediate bone 23.

  In the present invention, several bones can be added to form a multi-stage bone assembly, such as a four-stage, five-stage, six-stage, or seven-stage folding bone assembly. Is not limited.

  The front bone 25 has an inner end portion that is connected to or integrally formed with the joint portion 251 so as to be rotatably connected to the intermediate bone 23, and an outer edge of the umbrella C on the ball tip portion 252. In order to fix the part, it has an outer end connected to the ball tip 252.

  The anterior bone 25 has a U-shaped groove 250 recessed in the longitudinal direction. The U-shaped groove 250 is linear in the radial direction in accordance with the radius of the umbrella C fixed to the bone assembly 2. ing.

  The U-shaped anterior bone 25 can be formed integrally by molding or by machining to form the U-shaped groove 250.

  When formed by extrusion, the U-shaped tip bone 25 is further connected to the inner joint 251 and to the outer ball tip 252.

  Further, in order to integrally form the joint portion 251 and the ball tip portion 252 on both ends of the front bone 25, the front bone 25 can be integrally formed by injection molding.

  When strong winds are blown, the wind or air flow W entering the U-shaped groove 250 is smoothly guided through the U-shaped grooves 250 distributed radially under the umbrella C or guided outward. (See FIGS. 6 and 7) Eventually, the air traps T that are discharged from the end portions of the respective forebones 25 and formed on the umbrella canopy or the umbrella fabric C do not occur. Therefore, when the umbrella is open, strong air or wind pressure acting on the umbrella is released, and the umbrella C and the bone assembly 2 are prevented from being deformed. In this way, an appropriate and auxiliary protection function of the umbrella is obtained.

  On the other hand, the tip bone 25 is not a solid column or a cylindrical rod, but has a U-shaped cross section, which is convenient for handling and storage.

  When the anterior bone 25 is produced, the anterior bone 25 has a U-shape that is not a solid rod, so that it can be produced with fewer raw materials, saving material and reducing production costs.

  FIG. 8 shows another embodiment of the present invention when the umbrella is folded.

  FIG. 8 discloses another embodiment of the present invention by modifying the three-stage folded bone assembly 2. This three-stage folded bone assembly 2 is rotatably connected to an upper notch 20 formed at the top of the central shaft 1 and an upper bone 21 and is rotatably connected to the upper bone 21, respectively. An extended bone 22 that is rotatably connected to the runner 3 that is slidably held on the upper bone 21, and an upper bone 21 that is rotatably connected to the runner 3. The intermediate bone 23 and the U-shaped groove 250 recessed in the longitudinal direction are connected to the intermediate bone 23 so as to be rotatable, and are connected to the upper bone 21 via the elastic bone 26 juxtaposed to the intermediate bone 23. And a tip bone 25 connected rotatably.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims for utility model registration. For example, the material for producing the anterior bone 25 is not limited. However, the stiffness, hardness, and strength of the anterior bone 25 need to be carefully and thoroughly considered to create a strong bone assembly.

It is a figure which shows the bone assembly at the time of opening the conventional umbrella. It is sectional drawing which follows the 2-2 line of FIG. It is a figure which shows the time of opening an umbrella. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a figure which shows the ball | bowl front-end | tip part connected with the outer edge part of a tip bone. It is sectional drawing of the tip bone when exposed to strong wind force. It is sectional drawing which follows the 7-7 line | wire of FIG. It is other embodiment of this invention when an umbrella is folded.

Explanation of symbols

1 central axis,
2 bone assembly,
3 Lanna,
20 upper notch,
21 Upper bone,
22 expanded bone,
23 Intermediate bone,
24 connecting bones,
25 Forebone,
26 elastic bones,
250 U-groove,
251 joint,
252 ball tip,
C Umbrella,
W air flow,
T Air trap.

Claims (4)

A multi-stage foldable bone assembly adapted to be pivotally coupled to a central axis of an umbrella having an umbrella secured to the bone assembly,
The bone assembly has a tip bone formed rotatably on an outer portion of the bone assembly;
The tip bone has a U-shaped groove recessed in the longitudinal direction of the tip bone,
The U-groove extends radially linearly to match the radius of the umbrella secured to the bone assembly;
A multi-stage foldable bone assembly characterized in that a cross section of the tip bone is U-shaped. The bone assembly includes at least one upper bone coupled to an upper notch formed at the top of the central shaft;
An expanded bone that is pivotally coupled to the upper bone and pivotally coupled to a runner that is slidably held on the central shaft or a sleeve disposed on the central shaft;
An intermediate bone rotatably connected to the upper bone and the expanded bone, respectively;
The multi-foldable bone assembly according to claim 1, further comprising the tip bone rotatably connected to the intermediate bone.   The multi-foldable bone assembly according to claim 2, wherein the intermediate bone is rotatably connected to the upper bone via a connecting bone.   The multi-foldable bone assembly according to claim 2, wherein the intermediate bone is rotatably connected to the expanded bone through a connecting bone.

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