JPH04166103A - Foldable umbrella - Google Patents

Abstract

PURPOSE:To facilitate assembling and processing foldable umbrellas to improve productivity by attaching a twisted spring having one end engaged with a connecting portion between the shaft ribs and the other end engaged with the base of the shaft, thereby energizing both the shaft and ribs in the direction of coming closer to each other. CONSTITUTION:A twisted coil spring 21 coiled onto a pivoting axis P connecting a rib 14 with a shaft 12 energizes in the direction of making both the shaft 12 and rib come closer to each other. Since the diameter of the coil spring is not effected in any way by the width of the longitudinal width of the shaft 12, a, spring with an appropriate twisting force can be fitted. As a twisted coil spring 21 is provided in the place of a tensile spring, all that is necessary in assembling the shaft 12 with the rib 14 is to insert both ends of the twisted coil spring 21 into the connecting portion between the shaft 12 and the rib 14 of the umbrella frame 11 to connect them.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in folding umbrellas.

(Prior Art) Generally speaking, folding umbrellas have the inconvenience of being difficult to fold as one of the umbrella ribs opens due to the weight of the fabric, as shown in Figure 3. And like this, the umbrella bone l
If you try to forcefully squeeze the bone in the direction of the arrow when it is open, there is a risk of damaging the bone. Therefore, the umbrella bone l
A folding umbrella has been proposed that uses spring force to prevent the bones from opening when folded. A representative example of this is the umbrella rib l having a structure as shown in FIG. To explain this, the umbrella rib 1 of this folding umbrella connects one end 3a of a tension spring (coil spring) 3 arranged along the groove of the rib 2 to the rib 2 and the halo 4.
It is fixed to the joint part 5 of the main bone 2 and the support bone 6, and the other @3b is passed through the vicinity of the joint part 7 between the main bone 2 and the support bone 6 and fixed to the support bone 6. When the umbrella is opened, the umbrella is opened against the tension of the tension spring 3, or when the umbrella is closed and folded, the elastic force of the tension spring 3 holds the main rib 2 so that it does not open. Umbrellas are easier to fold. After folding the cloth, wrap the cloth along the outer periphery of the umbrella rib 1 and push the grip handle (not shown) at the rear end of the umbrella shaft 8 (see Figure 3) toward the tip. It is shortened.

Another umbrella rib that prevents the ribs from opening is shown in Figure 5. This umbrella rib will be explained based on the diagram. Note that the same parts as those described above are given the same reference numerals, and explanations thereof will be omitted. This umbrella rib l has a coiled link 9 fixed in the groove of the main rib 2 along the groove, and supports inside the coiled link 9 the foot part of a hair pin fitting 10 whose head is locked to the support bone 6. It is inserted after passing near the joint part 7 between the bone 6 and the main rib 2. In this way, when the umbrella is closed and folded, the movement of the main rib 2 is prevented by the sliding resistance of the foot of the hair bin metal fitting 10, and the umbrella rib 1 is prevented from opening, making it easier to fold the umbrella. After folding the umbrella, the umbrella shaft 8 (see FIG. 3) is shortened in the same manner as described above.

(Problems to be Solved by the Invention) Among the above-mentioned conventional techniques, those using tension springs have the following problems. That is, when assembling the umbrella rib, rather than applying tension to the tension spring, one end of the tension spring is fixed to the joint between the main rib and the halo, and the other end is passed through the vicinity of the joint between the main bone and the support bone. Since it is fixed to the bones, the assembly process is complicated, and the number of bones is large, which reduces the productivity of the umbrella. Also,
The tension spring must be placed along the groove of the main rib, so its diameter must be small. Therefore, if the diameter of the spring is made smaller, the tensile force will be stronger due to the nature of the spring. Therefore, 3- Wooden umbrellas use multiple umbrella ribs, and as many tension springs with a large tensile force as there are used for the umbrella ribs, a strong force is required when opening the umbrella. In addition, even when the umbrella is closed, it is necessary to apply force in the direction of opening the umbrella, so a large force is similarly required, and there is a problem in that the opening and closing operations of the umbrella lack smoothness.

In addition, in the case of a hairpin fitting, both legs of the hairpin fitting whose head is attached to the support bone are inserted through coil links provided in the groove of the main bone, so the hairpin fitting is attached to the support bone. When stopping the spring, it takes time and effort, and as with the above-mentioned tension spring, there is a problem in that productivity is affected.

The present invention has been made in order to solve the above-mentioned conventional problems, and by attaching a torsion coil spring to the connecting part of the main rib and the support bone of the umbrella rib, it improves assembly efficiency during manufacturing and improves productivity. To provide a folding umbrella which can be easily opened and closed, and which can be easily folded by preventing the ribs from opening when folding the umbrella.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention connects a main rib to a shaft pivotally connected to an umbrella shaft so as to be rotatable, and connects one end to the connecting portion on the side of the shaft. A torsion coil spring having the other end engaged with the base end side of the main rib is attached to the main bone, and the torsion coil spring urges the main bone and the support bone in a direction toward each other. It is.

(Function) Since the structure is as follows, the assembly of the main rib and the supporting bone is done by applying both ends of the torsion recoil spring to the main bone and supporting bone without applying torsional force to the torsion coil spring at the connecting part. This is done by locking and joining both bones together.

Furthermore, since torsion coil springs do not need to be installed along the main rib, the diameter of the spring is not restricted, and it is possible to select the most suitable spring based on the torsion force of the spring. These torsion coil springs apply elastic force in the direction that brings the main ribs and support bones closer together, and even when the umbrella ribs try to open due to the weight of the fabric when folding the umbrella, the torsion coil springs cause the bones to move closer together. This prevents the umbrella from opening and allows the umbrella to open and close smoothly.

(Example) Hereinafter, an example of the present invention will be described based on FIG. This example is a so-called "topless" umbrella, which does not have a rib in the center of the umbrella that supports the cloth when the umbrella is opened. In the figure, the umbrella rib 11 is the main rib J2 and the halo 13.
It is roughly composed of , two pedicles 14 , and a connecting bone 15 . The main rib 12 and the halo 13 are used to hold a cloth (not shown) when the umbrella is opened, and the main rib 12 is connected to the umbrella shaft 16.
The halo I3 is located at the tip 12a of the rib 12 on the exposed side.
It is connected to the.

The support rib 14 supports the main rib 12 when the umbrella is opened, and one end 14a thereof is pivoted near the proximal end 12b of the main rib 12, and the other end 14a is pivoted near the proximal end 12b of the main rib 12.
4b is pivotally attached to a lower wheel 17 that is slidably provided on the umbrella shaft 15. Further, the connecting bone 15 acts in conjunction with the support bone 14 to apply force to the main rib 12, and is composed of a support bone 18 and a connecting rod 19. One end 18a of the strut 18 is pivotally attached to a substantially central portion of the strut 14, and the other end +8b is pivotally attached to an upright 20 attached to the tip of the umbrella shaft 16. Also, the connecting rod 19
connects the vicinity of one end 18a of the bridge 18 and the proximal end 12b of the main rib 12.

In addition, the connecting portion 1 of the umbrella rib 11 between the main rib 12 and the support bone 14
2A has one end 21a on the support bone 14 side and the other end 21b on the main bone 1
A torsion coil spring 21 engaged with the proximal end 12b of the spring 2 is attached (see part n of FIG. 2). That is, the torsion coil spring 21 is wound around the pivot shaft P connecting the support rib 14 and the main rib 12, so that when the umbrella rib 11 is folded, the main rib 12
and the support bone 14 in a direction toward each other. Since the torsion coil spring 21 does not need to be arranged along the groove of the main rib 12, its diameter is not influenced by the width of the groove of the main rib 12. Therefore, it becomes possible to select and install a spring having an appropriate torsional force.

As described above, by attaching the torsion coil spring 21 in place of the tension spring to the connecting portion 12^ between the main rib 12 and the supporting bone 14, the assembly of the main rib 12 and the supporting bone 14 of the umbrella rib 11) γ This is done by fitting both ends of the torsion coil spring 21 into the main bone 12 and the supporting bone 14 to connect both bones without applying a torsion force to the torsion coil spring 21 at the connecting portion +2A.

Further, since the helical coil spring 21 does not need to be mounted along the main rib 12, the diameter of the spring 21 is not restricted, and a spring with an optimal torsion force can be selected.

In addition, since the torsion coil spring 21 biases the main rib 12 and the support ribs 14 in the direction of approaching each other, when the umbrella is folded, even if the umbrella rib 11 tries to open due to the weight of the cloth, this torsion coil spring 21 21 prevents the bones from opening and allows the umbrella to open and close smoothly.

(Effects of the Invention) As explained above, the present invention includes a torsion coil spring that is attached to the connecting portion between the main rib and the supporting bone, with one end engaged with the supporting bone side and the other end engaged with the proximal end side of the main bone. Since this torsion coil spring is used to bias the main rib and support bone in the direction of approaching each other, it is easy to attach the spring to the connecting part during production, and the assembly process is easy, increasing productivity. or improve. In addition, since torsion coil springs with different values of Il and W can be arbitrarily selected, the torsional force of the spring can be set to an appropriate level, making the opening and closing operations of the umbrella smooth and the ease of folding the umbrella. It prevents it from opening and makes it easier to fold.

[Brief Description of the Drawings] Fig. 1 is a front view showing one embodiment of the present invention, and Fig. 2 is a front view showing an embodiment of the present invention.
A partially broken enlarged view of part ■ in the figure, Figure 3 is a front view showing the open part of the conventional umbrella rib, Figures 4 and 5 show the conventional umbrella rib, and Figure 4 is a stretched FIG. 5 is an enlarged perspective view of the main rib equipped with a spring, and FIG. 5 is an enlarged perspective view of the main rib equipped with something different from that shown in FIG. 4. 12... Main rib 12b... Proximal end 12A... Connecting portion 14... - Support bone 16... Umbrella shaft 21... Torsion coil spring 21a... One end 21b... Other end Patent Applicant: Phoenix Co., Ltd.
2 seas i no 111 figure 2 figure 4

Claims (1)

[Claims] (1) A support bone pivotally connected to the umbrella shaft is rotatably connected to the main rib, and a torsion coil spring is attached to the connecting portion with one end engaged with the support bone side and the other end engaged with the proximal end side of the main rib. 1. A folding umbrella, wherein the main rib and the support rib are urged toward each other by the torsion coil spring.