JPH0112847Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a length-adjustable stake for gateball.

[Technical background of the invention and its problems]

Stakes used in gateball may have restrictions on their length based on rules.
For example, according to the so-called unified nationwide rules, the length of the handle from the tip of the grip side to the head is 70~
The length is 80cm. Competitors use stakes of the optimal length within the range allowed by these rules, depending on their height, physical strength, preference, etc.

However, it is often necessary to change the length of the stick due to changes in height, improved technique, or other reasons. Since the length of conventional stakes remains unchanged, it was necessary to purchase new stakes of different lengths.

[Purpose of the invention] The present invention was made based on the above circumstances, and its purpose is to provide a gateball stake that can be easily adjusted in length and has a simple structure. .

[Summary of the idea]

The gist of this invention is that the outer pipe,
an inner pipe telescopically inserted into the outer pipe; a first member having an eccentric shaft attached to an end of the inner pipe in the outer pipe and protruding eccentrically from the center of the inner pipe; a second member having an outer diameter smaller than the inner diameter of the outer pipe and having an eccentric hole at a position offset from the center, the eccentric shaft being inserted into the eccentric hole and rotatably supported by the first member; This is because we are equipped.

In the gateball stake with the above configuration, when one pipe is twisted in a relatively arbitrary direction, the eccentric shaft of the first member also rotates relatively as the pipe rotates.
Since the second member is in a substantially free state, the eccentric shaft is rotationally displaced relative to the eccentric hole of the second member, and as a result, the eccentric shaft hits the inner surface of the eccentric hole and the outer circumferential wall of the second member. Press it against the inner surface of the outer pipe. The outer pipe and inner pipe are thus fixed to each other.

When twisted in the opposite direction from this state, the eccentric shaft moves in the opposite direction to the above and releases the pressure on the second member, so the inner pipe can move freely relative to the outer pipe, and therefore both pipes can be moved in any direction. The length can be adjusted.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. In Figure 1, 1 in the figure is the handle;
A wooden head 2 is screwed onto one end 1a of the handle 1.

The handle 1 includes an outer pipe 3 and an inner pipe 4 telescopically inserted into the outer pipe 3. Both pipes 3 and 4 are made of aluminum alloy, for example. As shown in FIG. 2, the end 3a of the outer pipe is reduced in diameter. Further, the end portion 4a of the inner pipe located inside the outer pipe 3 is expanded so as to come into sliding contact with the inner surface of the outer pipe 3. In addition, marks such as scales (not shown) are displayed on the outer surface of the inner pipe 4 so that the length of the handle 1, that is, the amount of expansion and contraction of the inner pipe 4 can be known. This mark is the end face 3b of the outer pipe 3
It can be read by

A first member 6 is attached to the end 4a of the inner pipe. The first member 6 integrally includes a disc-shaped base 6 a and a cylindrical eccentric shaft 7 that projects at a position eccentric from the center of the inner pipe 4 . The first member 6 is, for example, an integrally molded product made of synthetic resin, and the base portion 6a is fixed to the pipe end portion 4a by appropriate means such as adhesion, press-fitting, or caulking. In addition, an annular groove 8 is formed at the tip of the eccentric shaft 7.
is formed, and a retaining ring 9 is fitted into this groove 8.

A second member 10 is rotatably supported by the first member 6. This second member 10 has a disk shape, and its outer diameter is slightly smaller than the inner diameter of the outer pipe 3. Furthermore, an eccentric hole 11 having an inner diameter larger than the outer diameter of the eccentric shaft 7 is formed in the second member 10 at a position offset from the center thereof. The eccentric shaft 7 is inserted into the eccentric hole 11. The second member 10 is also made of synthetic resin, for example.

In the embodiment formed as described above, when the eccentric shaft 7 and the eccentric hole 11 are eccentric in the same direction with respect to the center of the pipe 3 as shown in FIG.
Since the second member 10 can freely move in the radial direction without being restrained by the eccentric shaft 7, the second member 10 is not pressed against the inner surface of the pipe 3. Therefore, the outer pipe 3 is movable relative to the second member 10 in its length direction. In other words, the inner pipe 4 can be expanded and contracted with respect to the outer pipe 3, and its length can be adjusted. Further, most of the inner pipe 4 can be housed within the outer pipe 3 for convenient storage or transportation.

On the other hand, if either one of the pipes 3, 4 is twisted in a relatively arbitrary direction from the state shown in FIG.
0 is in an almost free state and does not rotate together with the eccentric shaft 7, so as shown in FIG.
is rotationally displaced relative to the eccentric hole 11. In this way, the side surface of the eccentric shaft 7 comes into contact with the inner surface of the eccentric hole 11, and a portion 10a of the outer peripheral surface of the second member 10 is strongly pressed against the inner surface of the outer pipe 3. In this way, the outer pipe 3 and the inner pipe 4 are firmly fixed to each other. When twisted in the opposite direction from this state, the eccentric shaft 7 moves in the opposite direction to the above, resulting in the state shown in FIG. 4, where both the pipes 3 and 4 can be moved again.

As described above, according to the gateball stake, the pipes 3 and 4 can be fixed and unfixed by a simple operation of twisting the pipes 3 and 4 in any direction, and the length can be adjusted easily. It's easy to do. Therefore, for example, the length of handle 1 is
If the range of length adjustment is limited to 70 to 80 cm, the length can be freely selected and used as long as it does not violate the rules. In addition, by providing a stopper part etc. in the pipe 3,
The range in which the length can be adjusted may be structurally limited. Alternatively, without providing a stopper part, a mark indicating a range within which length adjustment is allowed may be attached to the outer surface of the pipe 4, and adjustment may be made within that range.

[Effect of idea]

As described above, according to the present invention, the length of the stake can be adjusted with a simple operation, and the first member and the second member of simple shape can be combined, and the number of parts can be reduced. Moreover, the structure is extremely simple.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of a gateball stake, Fig. 2 is an enlarged sectional view of the portion shown in Fig. 1, and Fig. 3 shows the first and second members. The perspective view, FIG. 4, and FIG. 5 are cross-sectional views showing the positional relationship between the first member and the second member, respectively. 1...Handle, 2...Head, 3...Outer pipe,
4...Inner pipe, 6...First member, 7...Eccentric shaft, 10...Second member, 11...Eccentric hole.

Claims (1)

[Scope of utility model registration request] an outer pipe; an inner pipe telescopically inserted into the outer pipe; and a first shaft having an eccentric shaft attached to an end of the inner pipe within the outer pipe and protruding eccentrically from the center of the inner pipe. a second member having an outer diameter smaller than the inner diameter of the outer pipe and having an eccentric hole at a position offset from the center, the eccentric shaft being inserted into the eccentric hole and rotatably supported by the first member; A gateball stake characterized by comprising a member and.