JP3129327U - umbrella - Google Patents

Abstract

An umbrella in which a tip portion of a receiving bone of an umbrella is pivotally supported by a joint member fixed to the main bone, and the joint member is fixed to the main bone via a tubular portion attached to the outer side of the main bone. The fracture of the parent bone is prevented at the boundary portion between the tubular portion and the parent bone on the side closer to the tip than the tubular portion.
An extension portion 20 thinner than the tubular portion 13b is integrally formed on the tip side of the tubular portion 13b of the joint member 13.
[Selection] Figure 1

Description

  The present invention relates to an umbrella, and more particularly to a structure for attaching a distal end portion of a receiving bone (supporting bone) to a parent bone.

  In general umbrellas, a support bone whose root is pivotally supported by a movable peg (a peg) in a hand-opening umbrella or a peg in a self-opening umbrella that is opened by a push button. Or the front-end | tip part of a support bone is pivotally supported in the middle of the main bone.

  Recently, instead of metal umbrella bones, glass fiber or carbon fiber umbrella bones have been used. In that case, the joint bone made of synthetic resin fixed to the master bone or the receiving bone or It is comprised so that the front-end | tip part of a support bone may be supported.

  FIG. 3A and FIG. 3B schematically show the attachment structure of the distal end portion of the receiving bone (supporting bone) to the master bone in such a conventional umbrella, FIG. 3A is a front view, and FIG. 3B is a line 3B-3B in FIG. FIG.

  In the figure, reference numeral 1 is a glass fiber main bone, 2 is a glass fiber receiving bone, 3 is a synthetic resin joint member. The joint member 3 is molded in the form of the parent bone 1 as an insert member and is fixed to the middle of the parent bone 1 in an integrated manner with the parent bone 1, and is formed so as to straddle both sides of the parent bone 1 to be the tip of the receiving bone 2. A pair of flat plate portions 3a, 3a sandwiching the portion from both sides, and a tubular portion (generally extending from the flat plate portions 3a, 3a along the main bone 1 to the tip side and the upper ladle side and attached to the outer periphery of the main bone 1 3b and 3c) (referred to as “dabo”). The distal end portion of the receiving bone 2 is pivotally supported between the flat plate portions 3 a and 3 a by a pin 4.

  By the way, this kind of glass fiber or carbon fiber umbrella bone itself is light and durable, so that it can be reused by recycling even after the fabric (sheet) and others are damaged. there is a possibility.

  However, in the structure of the joint member 3 as shown in FIGS. 3A and 3B, when the umbrella is beaten in the wind or the tip is caught by an object, as shown in FIG. There has been a problem that the parent bone 1 is broken at the boundary portion between the tubular portion 3b and the parent bone 1.

  Then, an object of this invention is to provide the umbrella provided with the joint member which can prevent the above-mentioned fracture of a main bone.

The present invention is a joint in which the distal end of a receiving bone pivotally supported at the base of a movable wheel (for example, a lower wheel) slidably attached to the central shaft of an umbrella is fixed in the middle of the parent bone made of a non-metallic material. In the umbrella which is pivotally supported by the member and this joint member is fixed to the master bone via a tubular portion attached to the outside of the master bone,
An extension portion thinner than the tubular portion is integrally formed on the tip side of the tubular portion of the joint member.

  The thin extension portion may have a certain thickness along the main bone, or may be formed so as to become thinner in a tapered shape toward the tip side of the main bone, or the dew of the main bone. It may be formed so as to become thinner stepwise toward the front side.

  Preferably, the main bone is made of glass fiber or carbon fiber, and the joint member is made of a synthetic resin material that is molded in the form of the main bone as an insert member and fixed in the middle of the main bone in an integrated manner. It is preferable that

  According to the present invention, an extension portion that is thinner than the tubular portion is integrally formed on the tip side of the tubular portion of the joint member, thereby concentrating stress at the boundary portion between the joint member and the parent bone. Has the effect of preventing the fracture of the parent bone at this site

  Hereinafter, preferred embodiments of an umbrella according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram illustrating a general configuration of the umbrella in a closed state according to an embodiment of the present invention, with a part thereof omitted.

  In FIG. 1, the umbrella 10 includes a middle shaft (support) 12, an upper skull 14 fitted and fixed to an upper end portion of the middle shaft 12, and a plurality of master bones 1 whose roots are pivotally attached to the upper skull 14. The lower shaft 16 is slidably fitted to the middle shaft 12, the receiving bone 2 is pivotally supported by the bottom portion of the lower shaft 16, and the hand 18 is fixed to the lower end portion of the middle shaft 2. .

  A joint member 13 made of a synthetic resin material that is molded with the main bone 1 as an insert member and integrated with the main bone 1 is fixed to an intermediate portion of the glass fiber main bone 1. As in the conventional joint member 3 shown in FIGS. 3A and 3B, the joint member 13 is formed so as to straddle both sides of the main bone 1 and a pair of flat plate portions sandwiching the distal end portion of the receiving bone 2 from both sides. 13a, 13a, and tubular portions 13b, 13c that extend from the flat plate portions 13a, 13a along the main bone 1 to the tip side and the upper crossbone 14 side and are attached to the outer periphery of the main bone 1. The distal end portion of the receiving bone 2 is pivotally supported between the flat plate portions 13 a and 13 a by the pin 4.

  Further, a thin extension portion 20 that extends from the tubular portion 13b to the tip side and has an outer diameter smaller than that of the tubular portion 13b is integrally formed with the tubular portion 13b on the tip side of the joint member 13. .

  Even if the thin extension portion 20 has a constant outer diameter and a constant thickness along the main bone 1 as indicated by reference numeral 20a in FIG. 2A, it is indicated by reference numeral 20b in FIG. 2B. 3 having a tapered outer diameter toward the tip side of the main bone 1 so as to be continuously thin, or as shown by reference numeral 20c in FIG. 3C, It may be formed so that it has an outer diameter that gradually decreases in size toward the tip of one and gradually decreases in thickness.

  In any configuration, the concentration of stress at the boundary portion between the tubular portion 13b and the parent bone 1 is avoided, and there is an effect that breakage of the parent bone 1 at this portion can be prevented.

Schematic diagram illustrating the overall configuration of the umbrella in the closed state according to the present invention, with some parts omitted. The front view which shows 1st Embodiment of the principal part of the umbrella by this invention The front view which shows 2nd Embodiment of the principal part of the umbrella by this invention The front view which shows 3rd Embodiment of the principal part of the umbrella by this invention Front view of the main parts of a conventional umbrella Sectional view along 3B-3B in FIG. 3A Front view showing a broken state of a parent bone in a conventional umbrella

Explanation of symbols

1 Parent bone 2 Receiving bone 3,13 Joint member 3a. 13a Flat plate portion 3b, 3c, 13b, 13c Tubular portion 4 Pin 10 Umbrella 12 Middle shaft 14 Upper wheel 16 Lower wheel 10 Hand 18 Hand 20 Thin extension

Claims (6)

The tip of the receiving bone pivotally supported at the base of the movable handle slidably attached to the central shaft of the umbrella is pivotally supported by a joint member fixed in the middle of the parent bone made of a non-metallic material, In an umbrella in which a joint member is fixed to the master bone via a tubular portion attached to the outer periphery of the master bone,
An umbrella characterized in that an extension portion thinner than the tubular portion is integrally formed on the tip side of the tubular portion of the joint member.   The umbrella according to claim 1, wherein the thin extension is formed with a constant thickness along the main bone.   The umbrella according to claim 1, wherein the thin extension portion is formed so as to become thinner in a tapered shape toward a tip side of the main bone.   The umbrella according to claim 1, wherein the thin extension portion is formed so as to be gradually thin toward the tip side of the main bone.   The umbrella according to any one of claims 1 to 4, wherein the main bone is made of glass fiber or carbon fiber.   The umbrella according to claim 5, wherein the joint member is made of a synthetic resin material which is molded with the master bone as an insert member and integrated with the master bone.

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