JPH0515210Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to the umbrella structure of a folding umbrella, and in particular, the invention has a structure that allows the umbrella to be fully opened easily without applying any force, and also has a quick closing action. The present invention relates to an umbrella rib structure for a three-stage folding umbrella which is capable of opening the umbrella and has a large opening diameter in relation to the length of the umbrella rib.

<Prior art> Figures 2 and 3 are diagrams showing the conventional technology of the umbrella rib structure of a three-tiered folding umbrella, and Figures 2A to C are diagrams showing the umbrella rib structure of an early three-tiered folding umbrella. Figures 3A to 3C show the umbrella rib structure of the improved three-stage folding umbrella. In addition, in each figure, one three-tiered folding umbrella is usually 8 to 12
Only one set of umbrella ribs, which are provided in pairs, is shown.

In Fig. 2A, the umbrella rib structure of the early three-stage folding umbrella includes a rib 1 and a pivot point E at the lower end of the rib 1.
The tip bone 2 and the main bone 1 are rotatably connected through the
A strut 3 rotatably connected to the upper end 12 via a pivot point F, a base bone 4 rotatably connected to the middle of the strut 3 via a pivot point G, and a master rib 1. It is rotatably connected to the upper end of an extension part 14 extending upward from the upper end 12 via a pivot point H, and
A pair of umbrella ribs is constituted by a support bone 5 whose lower end is rotatably connected to the middle of the base bone 4 via a pivot point J. And this umbrella body is the base bone 4
Upper wheel 70 whose upper end is fixed to the upper end of the middle rod 7
is rotatably connected to the middle rod 7, and the lower end of the strut 3 is connected to the middle rod 7.
It is rotatably connected to a lower wheel 72 which is fitted to be vertically slidable in the direction of arrow U or D below the upper end of the wheel. Further, the middle rod 7 is provided with an upper flicker 74 between the upper wheel 70 and the lower wheel 72 for temporarily fixing the lower wheel 72 at the opening position.

In FIG. 2B, in the umbrella rib structure of such an early three-stage folding umbrella, the tip rib 2 rotatably connected to the lower end of the main rib 1 via a pivot point E has the structure shown in the figure. Therefore, when opening and closing early three-tiered umbrellas, it was necessary to open and close the tip rib 2 by hand.

To explain this opening/closing operation in Fig. 2C, when folding the initial three-stage folding umbrella, the tip rib 2 is rotated in the direction of arrow B around the pivot point E to the position shown by the two-dot chain line. It was necessary to fold the umbrella, and conversely, when unfolding the early three-stage folding umbrella, it was necessary to rotate the tip rib 2 shown by the two-dot chain line in the direction of arrow A around the pivot point E to unfold it.

In Fig. 2A, the opening operation is as follows:
When the middle rod 7 is stretched out and the lower wheel 72 is pushed up in the direction of arrow U and temporarily fixed on the upper wheel 74, the main rib 1
etc., the umbrella will be in the open state, but the tip bone 2 will not be in the open state automatically, so if the umbrella cloth (not shown) is stretched, move the bottom wheel 72 to the arrow U
After pushing down in the direction and spreading the tip bones 2 one by one,
By pushing up the lower wheel 72 again in the direction of arrow U and temporarily fixing it to the upper flap 74, the opening of the initial three-tier folding umbrella was completed.

Therefore, with the early three-tier folding umbrellas, when you encounter a rain shower, etc., the more you panic, the longer it takes to open the umbrella, and when the umbrella opens, you end up soaking wet, or when the umbrella is folded. Even when folding, it was very troublesome as it was necessary to bend the tip bones 2 one by one.

Figures 3A and 3B show an attempt to improve the umbrella rib structure of such an early three-tier folding umbrella to automatically open and close the tip rib 2.
Filed in Taiwan by Bruns Co., Ltd. (Application No.
6620156) and was published as a utility model (publication number 22991) on April 1, 1978 (inventor: Heinz Weber).

In FIGS. 3A and 3B, the umbrella rib structure of the three-tiered folding umbrella made by Brans adds a second support 6 to the umbrella rib structure of the initial three-tiered folding umbrella illustrated in FIGS. 2A to C. Thus, the tip bone 2 was configured to open and close automatically.

This second support bone 6 is approximately parallel to the main rib 1, and its upper end is pivotally connected below the pivot point F of the support bone 3 via the pivot point K, and also to the pivot point E of the main bone 1 and the tip bone 2. It is pivotally connected via a pivot point L to an extension portion 14 extending from the main body. The main rib 1, the extending portion 20 of the distal bone 2, the upper end portion of the support bone 3, and the second support bone 6 constitute a second four-joint mechanism E, F, K, and L.
As shown in FIG. 3A, when the lower wheel 72 is pushed up in the direction of the arrow U, the pivot point L where the second support bone 6 is pivotally connected to the tip bone 2 is affected by the action of the second four-joint mechanism. The tip of the tip bone 2 is rotated upward in the direction of arrow M, and the tip of the tip bone 2 is rotated downward in the direction of arrow N to bring it into the open state shown in FIG. 3B. had achieved its purpose.

<Problem that the invention aims to solve> However, the umbrella rib structure of the three-tiered folding umbrella disclosed in the above-mentioned Republic of China (Taiwan) utility model announcement (publication number 22991) is not perfect when actually used. There was a drawback that the lower wheel 72 had to be pushed up with force just before the umbrella was opened. This drawback is explained in Figure 3B.
Immediately before the umbrella is fully opened as shown in FIG.
The main rib 1 and the pivot point L come into contact with each other, and the second four-bar mechanism forms a triangle of F, K, and L, and the link movement of the first four-bar mechanism F, G, J, and H is stopped. However, at this point, the umbrella is not fully opened, and in order to fully open the umbrella, it is necessary to
2 in the direction of arrow U, it was necessary to curve the support bone 5 slightly downward and bring it into a completely open state.

Furthermore, since it is necessary to curve the support bone 5 in this way, it is not possible to downsize the first four-section mechanism F, G, J, H, and as a result, even in the completely open state, the base bone 4 and support bone 5 cannot be made smaller. The angle θ formed by the bones 5 was much smaller than 180°, and the opening diameter of each umbrella bone was small compared to the length of each umbrella bone.

Furthermore, the first four-bar mechanism shown in Fig. 3A forms a substantially parallelogram with the pivot points F, G, J, and H, but a pivot point K is added when the umbrella rib opens and closes. As a result, there are five force points F, G, J, H, K, so the first four-joint mechanism F, G, J, H receives the link movement from the second four-joint mechanism E, F, K, L. Because of the interfering force, the umbrella closing operation could not be performed quickly.

This invention was made against the background of the above-mentioned circumstances, and in the umbrella rib structure of a three-tiered folding umbrella, the pivot point between the second support and the support is rotatably connected by an elastic connecting member. By doing so, you can easily open the umbrella completely without using any force, and
It is an object of the present invention to provide an umbrella whose opening diameter is large in proportion to the length of each umbrella rib, and furthermore, an umbrella which can be quickly closed by the elastic connecting member.

<Means for Solving the Problems> In order to solve the above problems and achieve the desired purpose, in the umbrella structure of the three-tiered folding umbrella, an upper wheel is fixed near the upper end, and a wheel is provided at a position below the upper wheel. A middle rod that supports a lower wheel which is temporarily fixed at a predetermined position and allows the umbrella bone to be in an open state in a reciprocating manner; , tip bone;
It has a base bone, a support bone, and a support bone, and both ends of the main bone are pivotally connected to one end of the support bone and one end of the tip bone, and both ends of the base bone are pivotally connected to the upper wheel and the middle of the support bone. The other end is pivotally connected to the lower wheel, the support bone is approximately parallel to the support bone, and both ends are attached to an extension part extending from the part of the main bone that pivots with the support bone and pivoted at an appropriate position on the base bone. In the umbrella structure, the umbrella ribs are in contact with each other and include an extending portion of the main rib, a part of the base bone, a part of the strut, and an umbrella body that constitutes a four-bar mechanism of the link with the support bones, The body is approximately parallel to the main bone, one end of which is pivotally connected to an extending portion extending from one end side of the distal bone, and the other end is pivotally connected to an appropriate position of the support bone, and the body It is effective to provide a second support bone provided with a connecting elastic member at a certain position.

In Fig. 1C, to explain the function of the umbrella rib structure of the three-tiered folding umbrella related to this invention, the lower wheel 7
2 is pushed up in the direction of arrow U and reaches the open position where it is temporarily fixed by the upper flip 74, the elastic part 62 of the connecting elastic member 60 expands, so that the first
The four-joint mechanisms F, G, J, and H are again capable of link movement, and the angle θ formed by the base bone 4 and the support bone 5 can be made close to 180°. Therefore, as shown in the figure, the main bone 1, tip bone 2, base bone 4, and support bone 5 draw a nearly straight line.

Further, in the umbrella closing operation, the elastic portions 62 of the connecting elastic members 60, which had been extended, contract, so that each umbrella rib is instantly folded.

<Example> Hereinafter, a preferred example of this invention will be described based on the drawings.

Figure 1A is a diagram showing the starting state of the umbrella opening operation;
FIG. 1B is a diagram showing a state immediately before the umbrella is opened, and FIG. 1C is a diagram showing the umbrella in an opened state.

In FIG. 1A, this embodiment includes a master rib 1, a tip rib 2 rotatably connected to the lower end of the master rib 1 via a pivot point E, and a tip rib 2 rotatably connected to the upper end of the master rib 1 via a pivot point F. A movably connected strut 3 and this strut 3
The base bone 4 is rotatably connected in the middle via a pivot point G, and the upper end thereof is rotated via a pivot point H to an extending portion 14 extending upward from the upper end of the main rib 1. A support bone 5 is rotatably connected to the support bone 4, and its lower end is rotatably connected to an appropriate position of the base bone 4 via a pivot point J, and its upper end is connected to the vicinity of the upper end of the support bone 3 via a pivot contact point K. An extension part 2 is rotatably connected to the extension part 2 and has a lower end extending from a pivot point E of the distal bone 2.
0 through a pivot point L, the second
the supporting bone 6, the middle rod 7, and the upper wheel 70 which is fixed near the upper end of the middle rod 7 and pivotally connects the upper end of the base bone 4.
and a lower wheel 72 which is fitted below the upper end of the middle rod 7 and slides up and down in the direction of arrow U or D, and which pivotally connects the lower end of the strut 3, and an upper wheel which temporarily fixes the lower wheel 72 in the open position. In the umbrella structure of the three-stage folding umbrella comprised of a flip-up 74, a connecting elastic member 60 is provided between the upper end portion of the second support 6 and the pivot point K.

The connecting elastic member 60 includes an elastic part 62 whose upper end is pivotally connected to the pivot point K, and a connecting part 64 provided at the upper end of the second support 6.

In this embodiment, the elastic portion 62 employs a tension coil spring.

In this embodiment, the connecting portion 64 is a male thread that is integrally formed on the outer circumferential surface of the upper end of the second support 6, and is screwed into the central through hole of the tension coil spring as the elastic portion 62. In some cases, the bone 3
Alternatively, even if the second support bone 6 is subjected to a deforming force, it is configured to be able to be absorbed and eliminated by the connecting portion 64.

In addition, as shown in FIG. 1C, this connecting portion 64
A connecting hole 6 opened at the upper end of the second support bone 6 as
It is also possible to provide 4.

Next, referring to FIG. 1B and FIG. 1C, the umbrella opening operation of this embodiment will be explained.

In FIG. 1B, when the lower wheel 72 is pushed up in the direction of the arrow U, the pivot point L of the second support bone 6 with the tip bone 2 is rotated upward in the direction of the arrow M, and the tip of the tip bone 2 is rotated upward in the direction of the arrow M. is the pivot point L of the arrow with the tip bone 2
is rotated upward in the direction of arrow M, and the tip of the tip bone 2 is rotated downward in the direction of arrow N, so that the umbrella is ready to open. At this time, since the pivot point L is in contact with the main rib 1, the second four-bar mechanism E, F, K, L forms a triangle F, K, L, and the first four-bar mechanism F,
Stop the link movements of G, J, and H. This umbrella opening preparation state is almost the same as the umbrella opening preparation state shown in FIG. 3B, and the angle θ formed by the base bone 4 and the support bone 5 is also approximately the same size.

In FIG. 1C, the elastic part 62 of the connecting elastic member 60 expands until the lower wheel 72 is further pushed up in the direction of the arrow U and reaches the open position where it is temporarily fixed by the upper flicker 74. The four-joint mechanisms F, G, J, and H become capable of link movement again, and the angle θ approaches approximately 180°. Therefore, as shown in the figure, the main bone 1, tip bone 2, base bone 4, and support bone 5 draw a nearly straight line. At this time, the force for extending the elastic portion 62 is smaller than the force for deforming the above-mentioned support bones 5, resulting in a light umbrella opening operation.

Conversely, in the umbrella closing operation of this embodiment, when the lower wheel 72 is released from the temporary fixation of the upper flicker 74 and begins to move downward in the direction of arrow D, the elastic portion 62 of the connecting elastic member 60 that has expanded The end bone 2 is rotated upward in the clockwise direction by the urging force that tends to reduce the second four-bar mechanism E, F,
Since K, L and the first four-bar mechanism F, G, J, H recover the state shown in FIG. 1A, inertial force is also applied and each umbrella rib quickly enters the closed state.

<Effects of the invention> Since this invention is configured as described above, it achieves at least the following effects.

The umbrella rib structure of the three-tiered folding umbrella of the present invention is such that the second spine is pivotally connected to an appropriate position of the bridge via a connecting elastic member, and the elastic member pulls the four-bar mechanism of the two links simultaneously. , so only a small force is required to fully open the umbrella. Furthermore, the base bone and the support bones are expanded to a substantially horizontal position due to the stretching action of the connecting elastic member, so that the opening radius becomes large. In the umbrella closing operation, the four-bar mechanism of the two links simultaneously acts in the direction of folding due to the contraction of the connecting elastic member, so each umbrella rib is quickly and automatically closed, and the umbrella is in the closed state. In this case, even if it is kept upright, the main rib and the support bone will not open due to the weight of the tip bone. Moreover, since each link is made entirely of bones, it has high strength and can be used for a long period of time without breaking or bending, making it of high practical value.

[Brief explanation of the drawing]

Fig. 1A is a side view of the main parts showing the three-stage folding umbrella structure (in the state of preparation for opening) related to this invention, and Fig. 1B is a side view of the main parts showing the state immediately before the umbrella is opened.
Figure C is a side view of the main part showing the fully opened state, Figure 2A is a side view of the main part showing the umbrella rib structure (in preparation for opening) of an early three-tiered folding umbrella, and Figure 2B is a side view of the main part showing the umbrella in its fully opened state. , a perspective view of the main part showing the pivotal part between the main bone and the tip bone, 2nd
Figure C is a side view of the main part showing the open and closed state of the tip bone,
FIG. 3A is a side view of the main part showing the umbrella structure of the improved three-tiered folding umbrella (in progress state of opening), and FIG. 3B is
FIG. 3 is a side view of the main parts showing the umbrella in its fully opened state. Main symbols in the drawing, 1... Main bone, 2... Tip bone,
3... Bone, 4... Basic bone, 5... Structural bone, 6... Second supporting bone, 7... Middle rod, 14... Extended portion, 20...
...Extension part, 60...Elastic member for connection, 62...Elastic part, 64...Connection part, E, F, G, H, J,
K, L... Pivot points.

Claims (1)

[Scope of Claim for Utility Model Registration] An upper wheel is fixed near the upper end, and a lower wheel is provided at a position below the upper wheel and is temporarily fixed at a predetermined position to bring the umbrella rib into an open state. A rod, and a plurality of sets are installed between the upper and lower wheels around the middle rod, each having a main rib, a tip bone, a basal bone, a bridge, and a supporting bone, and both ends of the main bone are connected to one end of the bridge and It is pivoted to one end of the tip bone, both ends of the base bone are pivoted to the upper raceway and the middle of the stratum, the other end of the stratum is pivoted to the lower raceway, and the support bone is approximately parallel to the stratum. , an extension part whose both ends extend from a part of the main rib that is in pivotal contact with the support bone, and which is pivoted at an appropriate position on the base bone, In the umbrella structure in which the ribs and the supporting bones constitute a four-bar mechanism of the link, each set of umbrella ribs is substantially parallel to the main rib, and one end thereof is an extension part extending from one end side of the tip bone. A three-tiered folding umbrella, characterized in that it is provided with a second support member, the other end of which is pivotally connected to a support member at an appropriate position, and a second support member is provided at an appropriate position with a connecting elastic member. Umbrella structure.