JPH055484B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a non-folding automatic opening/closing umbrella,
A telescoping umbrella shaft, a compression coil spring for opening the umbrella provided inside the shaft, an elastic member for closing the umbrella that always applies an elastic force to the umbrella rib in the direction of closing the umbrella, and an operation button for opening and closing the umbrella. The umbrella is automatically opened by operating the opening operation button with the umbrella shaft compressed to the shortest compression state, and then the umbrella is automatically closed by operating the umbrella closing operation button, and further the above-mentioned The present invention relates to an automatic opening/closing type western umbrella configured so that the umbrella shaft, which has been extended to the longest relaxed state, is compressed again to the shortest compressed state to enable the next automatic opening/closing.

[Conventional technology]

So-called jump umbrellas, which automatically open using the restoring force of a spring by simply pressing a push button located near the handle, are widely used.

Furthermore, assuming that one hand is occupied with luggage and it is difficult to close the umbrella with both hands, umbrellas that can not only open but also close automatically have been proposed, and many have been disclosed. All of the conventionally known automatic opening/closing type umbrellas have a three-tier structure, so
The following problems arose.

It is heavy and bulky.

If the umbrella shaft is slightly bent, it will no longer work.

If the three umbrella shafts are fitted loosely, it will cause wobbling, but if they are fitted tightly to eliminate wobbling, the sliding between the umbrella shafts will be poor, making it difficult to operate.

Because there is no room to accommodate a long spring (usually a compression coil spring) inside the umbrella shaft, it is necessary to use a short spring to exert a strong force.
Requires a lot of force to operate.

If a short and strong spring is used, the force will change greatly with a small amount of spring deformation, making control difficult.

In order to operate smoothly and reliably with a short spring, and to maintain the opening force enough to withstand strong wind and rain even when the spring is stretched when the umbrella is opened, not only the spring but also other parts have to be of high quality. High-quality and high-precision products must be used, which increases manufacturing costs.

Since the structure is complicated, it is easy to break down, and there are many malfunctions such as opening accidentally, which is dangerous.

A foldable type does not have sufficient strength as an umbrella shaft.

etc.

[Problem that the invention seeks to solve]

The present invention has been made to solve the above-mentioned problems, and its purpose is to make it possible to easily open and close an umbrella with one hand, and to ensure that the opening and closing operations are performed stably and reliably. To provide a non-folding type automatic opening/closing type Western umbrella which is less likely to break down, is lightweight, convenient to carry, easy to use, and can be manufactured at relatively low cost.

[Means for solving problems]

The above purpose is to provide an automatic opening/closing umbrella equipped with the components described in (a) to (k) below, namely: (a) having an upper potter's wheel 4 at one end and a hook hole near the other end; 2a is composed of an outer tube 2 having an axially long slit 2b in the middle, and an inner tube 3 slidably inserted coaxially into the outer tube 2, and can be opened automatically. A two-stage telescopic umbrella shaft 1 configured to be able to expand and contract between the shortest compressed state and the longest relaxed state immediately after the umbrella is closed.

(b) A handle provided at the free end of the inner tube.

(c) A lower potter's wheel that is coaxially attached to the outside of the outer tube and is movable between the open and closed positions.

(d) A direction in which the umbrella shaft is provided coaxially within the umbrella shaft and extends from the upper end to the lower end of the umbrella shaft, and which extends between the outer tube and the inner tube even when the umbrella shaft is in its maximum relaxed state. A compression coil spring that can exert an elastic force on.

(e) A traction rod that is movable in the axial direction inside the umbrella shaft.

(f) A lower potter's wheel connection pin attached to the end of the traction rod on the upper potter's wheel side and connected to the lower potter's wheel through an axially long slit in the side wall of the outer tube.

(g) It is provided inside the handle and is capable of locking the end of the towing rod on the handle side, and when the towing rod moves toward the handle, the end is locked; A locking device that releases the end of the tow rod when it is moved to a different open position.

(h) It is swingably provided inside the grip handle and has a locking pawl at one end that can go in and out of the hook hole provided in the outer tube, and when the outer tube moves to the end of movement on the handle side, it locks. A hook whose claws go into the hook hole and lock the outer tube.

(i) A handle is provided in the handle so as to be movable between an umbrella opening command position and an umbrella closing command position, and is normally held at an intermediate position between these two positions and is moved to the umbrella opening command position. An opening/closing operation tool that releases the locking of the outer pipe by the hook when the umbrella is moved to the closing command position, and releases the locking of the traction rod by the locking tool when the umbrella is moved to the closing command position.

(j) A long rib with one end rotatably connected to the upper potter's wheel and a tip formed on the other end, one end rotatably connected to the lower potter's wheel, and the other end attached to the intermediate position of the rib. A non-foldable umbrella rib consisting of a rotatably connected bridge.

(k) An umbrella-closing elastic body that is attached to the umbrella rib and always applies an elastic force in the direction of closing the umbrella.

This can be achieved by an automatic opening/closing umbrella equipped with

[Effect]

With the above configuration, the umbrella shaft has a two-stage structure, which makes it light, the umbrella shaft slides well, and it is possible to use a single long compression coil spring that extends over the entire length inside the umbrella shaft. , the use of a long coil spring that does not require strong force when compressing the umbrella shaft, which is necessary after opening and closing the umbrella before using it again, and that the umbrella shaft remains in a strongly compressed state even when it is in its longest relaxed state. This allows the umbrella to maintain a stable open state even in strong winds, and the relatively simple structure means fewer breakdowns and lower manufacturing costs, making it suitable for both folding and non-folding long umbrellas. To provide an easy-to-use automatic opening/closing type Western umbrella which can withstand bending of the umbrella shaft and other rough handling, at low cost and in large quantities.

〔Example〕

Hereinafter, the configuration of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a longitudinal cross-sectional view showing a state in which the automatic opening/closing type Western umbrella according to the present invention is closed, and then the umbrella shaft is compressed to the shortest compressed state to enable automatic opening/closing operation (normal storage state); Figure 2 is a perspective view showing an example of a locking device provided on the handle of the umbrella shown in Figure 1, and Figure 3 is a longitudinal section showing the umbrella shown in Figure 1 in a fully opened state. FIG. 4 is a longitudinal sectional view showing the state when the umbrella rib is automatically closed from the open state shown in FIG. 3, that is, when the umbrella shaft is in the longest relaxed state.

In this specification, the end side of the umbrella will be referred to as "upper" and the handle side will be referred to as "lower."

In each figure, 1 is an umbrella shaft consisting of an outer tube 2 and an inner tube 3 slidably inserted therein, and 4 is an upper wheel fitted and fixed to the outside near the upper end of the outer tube 2. , 5 is a grip handle attached to the lower end of the inner tube 3, 6
7 is a lower potter's wheel slidably attached to the outer circumference of the outer tube 2; 7 is a compression coil spring housed in the umbrella shaft 1;
8 is a traction rod housed inside the compression coil spring 7 in the umbrella shaft 1; 9 is inserted from the upper end opening of the outer tube 2; and the pin 10 holds the outer tube 2 together with the upper wheel 4
A sleeve 11 fixed to the traction rod 8 was attached to the upper wheel side end of the pulling rod 8, and was connected to the lower wheel 6 through a slit 2b formed in the side wall of the outer tube 2 and a slit 9a formed in the side wall of the sleeve 9. The lower potter's wheel connecting pin 12 is a hook portion 8 provided inside the grip handle 5 and formed at the end of the traction rod 8 on the grip handle side.
When the traction rod 8 moves toward the grip handle, the hook 8a is locked, and when the traction rod 8 is slid to the left in the figure, the hook 8a of the traction rod 8 is locked. A locking tool for releasing the connection, 1
3 is a spring that acts between the left end of the locking tool and the inner wall surface of the grip handle cover 5a and pushes out the locking tool 12 to the right in the figure; 14 is swingably mounted in the grip handle 5 with a pin 14c; It has a locking claw 14a at one end that can enter and exit the hook hole 2a provided in the outer tube 2, and when the umbrella shaft 1 is compressed to the shortest compressed state, the outer tube 2 reaches the end of movement on the handle side. When moved, the locking claw 14a intrudes into the hook hole 2a to lock the outer tube 2. A hook 15 is swingably attached to the handle 5 by a pin 15c, and the umbrella opening operation portion 15a The opening/closing operation tool is configured such that when pressed, the pressing part 14b of the hook 14 is pressed, and when the umbrella closing operation part 15b is pressed, the right end of the locking tool 12 is pressed. A spring piece 17 is inserted into the lower end of the inner tube 3 and is fixed to the sleeve.
18 is an umbrella rib consisting of a master rib 18a and a support bone 18b;
Reference numeral 19 denotes an umbrella-closing elastic body that always applies force in the umbrella-closing direction to the strut 18b.

The umbrella shaft 1 of the automatic opening/closing type Western umbrella according to the present invention is constructed by inserting an inner tube 3 into an outer tube 2 so as to be slidable in a nested manner. 4 is attached to the lower end of the inner tube 3, and a grip handle 5 is attached to the lower end of the inner tube 3. Further, a hook hole 2a is formed near the lower end of the outer tube 2, into which a locking claw 14a of the hook 14 is inserted when the umbrella is closed, and a hook hole 3a is formed in the inner tube 3 at a corresponding position.

In addition, as shown in the partial drawer explanatory diagram surrounded by the dotted line in FIG. The other part has a short cylindrical shape with a diameter approximately equal to the distance across opposite sides of the hexagonal part, and the inner tube 3 is a tube with a circular cross section that is smoothly inserted into the short cylindrical part of the outer tube 2 except for the upper end. The upper end thereof is a short hexagonal tube that is firmly inserted into the hexagonal tube portion of the outer tube 2.

Therefore, by inserting the lower end of the inner tube 3 into the outer tube 2 through the upper end opening of the outer tube 2, the two are telescopically connected so as to be telescopic and non-rotatable relative to each other around the umbrella shaft. It also becomes impossible to pull out the inner tube 3 from the lower end of the outer tube 2.

Note that the cross-sectional shapes of the non-circular portions of the outer tube 2 and the inner tube 3 are not limited to hexagons, and may of course be square, octagonal, or other polygonal shapes.

Thus, a sufficiently long compression coil spring 7 is compressed and accommodated within the umbrella shaft 1. The compression coil spring 7 is a long coil spring, and its upper end acts on the lower end of the sleeve 9 inserted and fixed from the upper end opening of the outer tube 2, and its lower end acts on the upper end of the auxiliary tube 3b fixed to the upper end of the inner tube 3. It's starting to work.

The compression coil spring 7 has a free length that is sufficiently longer than the length of the umbrella shaft 1 when the umbrella is opened and the umbrella shaft 1 is extended to its longest relaxed state, as shown in FIG. Even in the longest relaxed state shown in FIG. 3, the compression coil spring 7 is still in a compressed state.

A first rib 18a is rotatably attached to the upper potter's wheel 4, and a strut 18b is rotatably attached to the lower potter's wheel 6, and the tip of the strut 18b is rotated to an intermediate position between the ribs 18a. freely connected.

Then, an elastic body 19 such as a thin coil spring is attached between a position of the lower potter's wheel 6 near the grip handle, slightly below the position where the support bone is attached, and a connecting position with the first rib 18a at the tip of the support bone 18b. As a result, all the struts 18b are drawn toward the umbrella shaft 1, so that a force is constantly applied to the umbrella ribs 18 in the direction of closing the umbrella.

Therefore, if no external force is applied, the umbrella rib will be folded as shown in FIG. 1 by the elastic force of the umbrella closure elastic body 19.

In addition, a set of umbrella ribs 18 consisting of the main rib 18a and the support rib 18b is attached to 6 to 10 pairs in the whole umbrella, and generally about 8 pairs, but in Figs. For the sake of clarity, only two of them are shown.

The maximum elastic force of the umbrella-closing elastic body 19 is set such that when the umbrella is opened, the compression coil spring 7 in the umbrella shaft 1 can stretch the umbrella-closing elastic body 19, and when the umbrella is closed, a sufficient closing force can be obtained. It is necessary to make a selection so that the

A traction rod 8 is provided inside the umbrella shaft 1, and a lower potter's wheel connection pin 11 is fixed to the upper end of the traction rod 8 so as to intersect at right angles therewith.

Both ends of the lower potter's wheel connection pin 11 protrude outside the umbrella shaft through axially extending slits 9a and 2b formed in the side walls of the sleeve 9 and the outer tube 2, and are inserted into and fixed to the lower potter's wheel 6.

The sleeve 9 functions as a stopper for the upper end of the compression coil spring 7 as described above, and also serves as a reinforcing member for the portion of the outer tube 2 where the slit 2a is opened.

The traction rod 8 in the umbrella shaft 1 is composed of an elongated metal member, and its length is from the grip handle 5 to the point directly below the upper potter's wheel 4 when the umbrella shaft 1 is in its shortest compressed state, as shown in FIG. A length that is long enough to reach the desired position is used.

A hook portion 8a is formed at the lower end of the traction rod 8, and is adapted to be locked to a locking tool 12 provided inside the handle 5, which will be described later.

Therefore, inside the grip handle 5 there are a locking tool 12, a spring 13,
An opening/closing operation mechanism consisting of a hook 14, an opening/closing operation tool 15, a spring piece 16, etc. is provided.

As shown in detail in FIG. 2, the locking tool 12 is made of a metal plate having a locking hole 12a in the center, and is pressed toward the right in the figure by a spring 13 provided at its left end. Its right end is brought into contact with the umbrella closing operation part 15b of the opening/closing operation tool 15.

In the state shown in FIGS. 1 and 3, the hook portion 8a at the lower end of the traction rod 8 is inserted into the locking hole 12a of the locking tool 12 and is locked therein.

However, as shown in Figure 1, when the umbrella is completely closed,
When the umbrella shaft is compressed, the hook portion 8a passes downward through the locking hole 12a and then extends further downward to form a slight play 8b.
It is recommended to configure the locking hole 12a so as to prevent the locking hole 12a from being inserted only halfway into the locking hole 12a, thereby preventing locking errors.

The sleeve 17 inserted into the inner tube from the lower end opening of the inner tube 3 and fixed therein guides the traction rod 8 as it moves up and down within the umbrella shaft 1 during umbrella closing and when the umbrella shaft is compressed. playing a role.

The operation and operation when opening the umbrella from the closed state shown in FIG. 1 will now be described.

When you press the opening operation part 15a of the opening/closing operation tool 15,
The pressing portion 14b of the hook 14 is pushed toward the umbrella shaft against the spring force of the spring piece 16, and as a result, the locking pawl 14a formed at the upper end of the hook 14 is released from the hook hole 2a of the outer tube 2 of the umbrella shaft 1. break away.

In this case, the outer tube 2 slides upward along the inner tube 3 due to the pushing up force of the compression coil spring 7 acting on the lower end surface of the sleeve 9 fitted and fixed to the upper end of the outer tube 2, thereby causing the umbrella Axis 1 is extended (see Figure 3).

At this time, the hook portion 8a at the lower end of the towing rod 8 remains locked to the locking tool 12 in the handle 5, so the lower hook 8a at the upper end of the towing rod 8
The lower potter's wheel 6, which is restrained by
and 9a, only the free outer tube 2 that is not restrained by the lower potter's wheel connection pin 11 slides upward.

In such a case, the upper potter's wheel 4 fixed to the outer tube 2 moves upward away from the lower potter's wheel 6, thereby lifting the main rib 18a, and the strut 18B connected thereto also moves under the elasticity of the closure elastic body 19. It rises against the force and becomes an open umbrella as shown in Figure 3.

The dimensions of each component are designed so that when the umbrella shaft 1 is fully extended by the compression coil spring 7, the umbrella rib 18 is completely opened.

Thus, in the open umbrella state as shown in FIG.
The angle made by the grip handle 5 is from the angle α of the upper potter's wheel 4 side.
The lengths of the outer tube 2 and the inner tube 3, the maximum and shortest lengths of the umbrella shaft 1, the positions and lengths of the slits 2b and 9a, etc. are determined so that the side angle β is smaller.

Next, when folding the umbrella, the user presses the umbrella closing operation part 15b of the opening/closing operation tool 15 provided on the grip handle 5.

In this case, the locking tool 12 is pushed to the left side in the figure against the elastic force of the spring 13, and as a result, the hook of the towing rod 8 that is locked to the edge of the locking hole 12a of the locking tool 12 is released. The engagement with the portion 8a is released, the traction rod 8 is released from the locking tool 12, and the restraining force that restrained the lower potter's wheel 6 in its original position against the elastic force of the umbrella elastic body 19 also disappears ( (See Figure 4).

In such a case, the struts 18b, 18b are connected to the closure elastic body 19 stretched between their tips and the lower potter's wheel 6.
is pulled toward the umbrella shaft 1 side by the contraction force, and the ribs 18a, 18a connected thereto are also folded and pulled toward the umbrella shaft side, and the lower potter's wheel 6 moves upward along the outer tube 2, that is, toward the upper potter's wheel 4. Move to.

As a result, the umbrella rib 18 enters the closed state as shown in FIG. 4, so that the closed state can be achieved by simply pressing the closing operation part 15b of the opening/closing operation tool 15.

At this time, the umbrella shaft 1 remains in an extended state, and the traction rod 8 is suspended by the lower wheel connection pin 10 within the umbrella shaft 1, but this is not a particular inconvenience, and it is possible to carry luggage etc. in hand. It is possible to achieve the intended purpose of automatically opening and closing the umbrella with only one hand while holding it.

To compress the umbrella shaft 1 from the state shown in FIG. 4 to the state shown in FIG. The inner tube 3 can be pushed into the outer tube 2 against the elastic force of 7 and returned to the original state shown in FIG.

At this time, the hook portion 8a at the lower end of the pulling rod 8 is guided by the sleeve 17, passes through the locking hole 12a of the locking tool 12 in the handle 5, and is locked.

Further, since the locking pawl 14a of the hook 14 fits into the hook hole 2a near the lower end of the outer tube 2, the shortest compressed state of the umbrella shaft 1 is maintained.

Therefore, the opening operation section 15 of the opening/closing operation tool 15 is opened again.
If you press a, the umbrella will automatically open again.

In this way, simply by operating the opening/closing operation tool 15 provided on the handle handle 5, the umbrella shaft is extended by the action of the compression coil spring 7 in the umbrella shaft, and the lower potter's wheel 6 is moved toward the handle handle when the umbrella is opened. When the umbrella is closed, the lower potter's wheel 6 moves back toward the upper potter's wheel 4 due to the action of the umbrella closing elastic body 19 between the lower potter's wheel and the supporter, and the opening and closing operations of the umbrella are automatically performed. It is.

〔Effect of the invention〕

Since the present invention is constructed as described above, the present invention provides an automatic opening/closing type umbrella having many advantages as follows.

Since the umbrella shaft has a two-tiered structure, it can be made lighter and thinner than the conventional three-tiered structure.

Since the umbrella shaft has a two-stage structure, there is little friction when opening and closing, and the operation is smooth.

The structure is simple, and there are fewer breakdowns and malfunctions.

Since a long coil spring can be accommodated within the umbrella shaft,
It is easier to control than conventional products that use short coil springs, and does not require large force when shortening the umbrella shaft.

Because it has a simple structure and stable function,
It is easy to assemble and requires low manufacturing costs.

Due to its simple structure, it can withstand a little rough handling.

It should be noted that the present invention is not limited to the embodiments described above, and includes, for example, the structure of the umbrella closing elastic body that always urges the umbrella rib in the umbrella closing direction, and the engagement of the lower end of the traction rod provided in the handle portion. The design of the stopper, opening/closing device, etc. can be changed as appropriate, and therefore, the present invention encompasses all modifications that can be easily conceived by a person skilled in the art from the above description within the scope of its purpose. It is.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a state in which the automatic opening/closing type Western umbrella according to the present invention is closed, and then the umbrella shaft is compressed to the shortest compressed state to enable automatic opening/closing operation (normal storage state); Figure 2 is a perspective view showing an example of a locking device provided on the handle of the umbrella shown in Figure 1, and Figure 3 is a longitudinal section showing the umbrella shown in Figure 1 in a fully opened state. 4 shows the state when the umbrella rib is automatically closed from the open state shown in FIG.
It is a longitudinal cross-sectional view showing an aspect when the umbrella shaft is in the longest relaxed state. 1...Umbrella shaft, 2...Outer tube, 2a...Hook hole,
2b...slit, 3...inner tube, 4...upper potter's wheel, 5...grip handle, 5a...grip handle cover, 6...lower potter's wheel, 7...compression coil spring, 8...traction rod, 8a... ...Hook portion, 9...Sleeve, 9a...Slit, 10...Pin, 11...Lower wheel connection pin, 12...Locking tool, 12a...Locking hole, 13...
...Spring, 14...Hook, 14a...Latching claw, 1
4b...pressing part, 15...opening/closing operation tool, 15a...
... Umbrella opening operation section, 15b... Umbrella closing operation section, 16...
Spring piece, 17...Sleeve, 18...Umbrella rib, 18
a... Main rib, 18b... Bone, 19... Closing elastic body.

Claims (1)

[Scope of Claims] 1. A telescoping umbrella shaft, a compression coil spring for opening the umbrella provided inside the shaft, and an elastic member for closing the umbrella that always applies an elastic force to the umbrella rib in the direction of closing the umbrella. , an opening/closing operation button, the umbrella shaft is compressed to the shortest compression state, the opening operation button is operated to automatically open the umbrella, and the umbrella closing operation button is then operated to close the umbrella. The following ( The automatic opening/closing umbrella described above, which is equipped with the components described in paragraphs a) to (k). (a) An outer tube 2 with an upper potter's wheel 4 at one end, a hook hole 2a near the other end, and an axially long slit 2b in the middle; A two-stage telescopic umbrella consisting of an inner tube 3 that is slidably inserted, and configured to be able to expand and contract between the shortest compressed state in which the umbrella can be automatically opened and the longest relaxed state immediately after the umbrella is closed. Axis 1. (b) A handle 5 provided at the free end of the inner tube 3. (c) A lower potter's wheel 6 is coaxially attached to the outside of the outer tube 2 and is movable between an open position and a closed position. (d) Provided coaxially within the umbrella shaft 1, extending from the upper end to the lower end of the umbrella shaft 1, and always remaining between the outer tube 2 and the inner tube 3 even when the umbrella shaft 1 is in its longest relaxed state. A compression coil spring 7 that can apply an elastic force in a direction that extends the umbrella shaft 1. (e) A traction rod 8 provided inside the umbrella shaft 1 so as to be movable in the direction of the central axis of the umbrella shaft 1. (f) A lower wheel connection pin 11 attached to the end of the pulling rod 8 on the upper wheel 4 side and connected to the lower wheel 6 through the slit 2b of the outer tube 2. (g) It is provided inside the handle handle 5 and can lock the end of the handle handle side of the tow rod 8.
A locking tool 12 locks the end of the traction rod 8 when the rod moves toward the handle, and releases the end of the traction rod 8 when the rod 8 is moved to an open position different from the locking position. (h) A locking pawl 1 that is swingably provided in the grip handle 5 and that can enter and exit a hook hole 2a provided in the outer tube 2 at one end.
4a, and when the umbrella shaft 1 is compressed to the shortest compression state and the outer tube 2 reaches the end of movement on the side of the handle 5, the locking pawl 14a invaginates into the hook hole 2a, and the outer tube 2 A hook 14 for locking. (i) It is provided in the grip handle 5 so as to be movable between an umbrella opening command position and an umbrella closing command position, and is normally held at an intermediate position between these two positions and moved to the umbrella opening command position. An opening/closing operating tool 15 that releases the locking of the outer tube 2 by the hook 14 when the umbrella is closed, and releases the locking of the traction rod 8 by the locking tool 12 when the umbrella is moved to the closing command position. (j) a long rib 18a, one end of which is rotatably connected to the upper potter's wheel 4, and the other end of which has a tip;
A non-foldable umbrella rib 1 consisting of one end rotatably connected to the lower potter's wheel 6 and the other end rotatably connected to an intermediate position of the main rib 18a.
8. (k) An umbrella-closing elastic body 19 that is attached to the umbrella rib 18 and constantly applies force in the umbrella-closing direction. 2 When the umbrella is opened, the angle formed between the strut 18b attached to the lower potter's wheel 6 and the umbrella shaft 1 is smaller on the grip handle 5 side than on the upper potter's wheel 4 side, and when the umbrella is closed, the angle formed by the umbrella shaft 1 is smaller on the handle handle 5 side.
The automatic opening/closing type umbrella according to claim 1, wherein the umbrella moves toward the upper potter's wheel 4 side. 3. Claim 2 in which the closure elastic body 19 is comprised of a stretchable elastic body 19 stretched between a position slightly closer to the grip handle of the lower potter's wheel 6 than the support bone attachment position and the tip of the support bone 18b.
The automatic opening and closing type umbrella described in . 4. The outer tube 2 is a tube with a polygonal cross section over substantially its entire length except for its lower end, and the portion of the lower end that is not a polygonal tube is a short cylindrical tube whose diameter is approximately the distance across opposite sides of the polygonal portion. The inner tube 3 is a tube with a circular cross section that is smoothly inserted into the short cylindrical portion of the outer tube 2 except for the upper end, and the upper end is inserted tightly into the polygonal tube portion of the outer tube 2. The automatic opening/closing type umbrella according to any one of claims 1 to 3, which is a short polygonal tube. 5. The automatic opening/closing type umbrella according to claim 4, wherein the polygonal portions of the outer tube 2 and the inner tube 3 are hexagonal tubes.