top

Abstract

To provide a spinning top which allows a user to visually enjoy and which can be stably rotated for a long term.SOLUTION: A spinning top has: a plurality of rod members; and a plurality of weights. The plurality of rod members is coupled mutually. The plurality of rod members includes a first rod member and a second rod member. The first rod member extends along a rotary axis line of the spinning top. The second rod member includes a grounding point. The grounding point is provided below the first rod member on the rotary axis line. The plurality of weights is arranged inside of at least some of the plurality of rod members. The plurality of rod members is arranged asymmetrically to the rotary axis line. The plurality of weights is provided so that a maximum inertia main axis matches the rotary axis line.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a spinning top. [Background technology]

[0002] A top is a type of toy that is played by spinning it. For example, Patent Document 1 discloses a top that is played by spinning it with a finger. This top has a spinning shaft and multiple vibrating parts. The multiple vibrating parts are rectangular in shape and arranged around the spinning shaft. When this top hits something, the vibrating parts generate a vibration sound. This allows you to enjoy not only the spinning of the top, but also the sound. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-174676 A Summary of the Invention [Problem to be solved by the invention]

[0004] As with the top described above, the ways to enjoy a top are not limited to simply spinning the top. For example, you can also enjoy it visually by watching the top spin. On the other hand, if the shape of the top becomes complicated in order to enjoy various ways of using a top, it becomes difficult to spin the top stably for a long time. The object of the present invention is to provide a top that can be enjoyed visually and can also be stably spun for a long time. [Means for solving the problem]

[0005] A top according to one embodiment of the present invention includes a plurality of rod members and a plurality of weights. The rod members are connected to one another. The rod members include a first rod member and a second rod member. The first rod member extends along a rotation axis of the top. The second rod member includes a grounding point. The grounding point is located below the first rod member on the rotation axis. The weights are disposed inside at least a portion of the rod members. The rod members are disposed asymmetrically with respect to the rotation axis. The weights are disposed such that the maximum principal axis of inertia coincides with the rotation axis.

[0006] The top according to this embodiment rotates around the axis of rotation by twisting the first rod. The rods are arranged asymmetrically with respect to the axis of rotation, so that the way they rotate can be visually enjoyed. On the other hand, if the rods are arranged asymmetrically with respect to the axis of rotation, it is difficult to balance the top. However, in the top according to this embodiment, weights are arranged inside at least some of the rods, and the weights are provided so that the maximum principal axis of inertia coincides with the axis of rotation. This allows the top to rotate stably for a long time.

[0007] The second bar may have a curved shape at the point where it touches the ground, which allows the top to spin more stably.

[0008] The rod members may have linear shapes extending in directions intersecting each other, which improves the visual effect.

[0009] The plurality of rod members may include a specific rod member. The specific rod member may include a hole extending in the axial direction of the specific rod member. The weight may be disposed in the hole. The specific rod member may include a hollow portion in which no weight is disposed. In this case, the presence of the hollow portion in the specific rod member increases the difference in weight between the specific rod member and the weight. This enhances the effect of the weight.

[0010] A particular bar member may include a lid that closes the hole. The lid may be disposed facing the hollow portion. In this case, the centrifugal force acting on the weight due to the rotation of the top is prevented from applying a load to the lid. This prevents the lid from falling off.

[0011] The particular bar member may include a first end and a second end. The second end may be located closer to the axis of rotation than the first end. The lid may be provided on the second end. In this case, the centrifugal force acting on the lid due to the rotation of the top is reduced. This reduces the likelihood of the lid falling off.

[0012] The plurality of rod members may include a specific rod member having a weight disposed therein. The specific rod member may include a first end and a second end. The second end may be located closer to the axis of rotation than the first end. The weight may be provided at the first end. In this case, the moment of inertia around the axis of rotation of the top increases. This allows a large rotational energy to be obtained.

[0013] The weights may be arranged so that, when viewed from the direction in which the rotation axis extends, they pass through the vertices of a polygon having its center of gravity at the position of the rotation axis, which makes it easier to align the rotation axis with the maximum principal axis of inertia.

[0014] The rods may be hollow, which reduces the weight of the top and thus reduces the risk of damage to the top.

[0015] The plurality of bar members may be square bars, which improves the visual effect.

[0016] The plurality of rod members may further include a third rod member, a fourth rod member, and a fifth rod member. The third rod member may be connected to the first rod member and extend in a direction intersecting with the first rod member. The fourth rod member may be connected to the third rod member and extend in a direction intersecting with the third rod member. The fifth rod member may be connected to the fourth rod member and extend in a direction intersecting with the fourth rod member. In this case, the visual effect is improved. Effect of the Invention

[0017] According to the present invention, a top is provided which is visually enjoyable and can be stably spun for a long period of time. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of a top according to an embodiment. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 4 is a cross-sectional view of a first rod member. [Figure 9] FIG. 4 is a cross-sectional view of a third rod member. [Figure 10] FIG. 11 is a perspective view of a top according to a first modified example. [Figure 11] FIG. 11 is a perspective view of a top according to a second modified example. [Figure 12] FIG. 11 is a top view of a top according to a second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a top 1 according to the embodiment. FIG. 2 is a front view of the top 1. FIG. 3 is a rear view of the top 1. FIG. 4 is a right side view of the top 1. FIG. 5 is a left side view of the top 1. FIG. 6 is a top view of the top 1. FIG. 7 is a bottom view of the top 1. As shown in FIG. 1 to FIG. 7, the top 1 includes a plurality of rod members 11-16. The rod members 11-16 have a linear shape extending in a direction intersecting with each other. The rod members 11-16 are connected to each other. The rod members 11-16 are arranged asymmetrically with respect to the rotation axis A1.

[0020] The rod members 11-16 each have the same cross-sectional shape. In this embodiment, the rod members 11-16 are rectangular rods, each having a square cross-sectional shape. The rod members 11-16 each have the same thickness. The rod members 11-16 are made of a resin such as polyamide or acrylic. Alternatively, the rod members 11-16 may be made of a metal such as aluminum.

[0021] The rod members 11-16 include a first rod member 11, a second rod member 12, a third rod member 13, a fourth rod member 14, a fifth rod member 15, and a sixth rod member 16. The first rod member 11 is a part that serves as a handle and a rotation axis when the top 1 is spun. The first rod member 11 extends along the rotation axis A1. The second rod member 12 includes a ground point 121. The ground point 121 is located below the first rod member 11 on the rotation axis A1. The ground point 121 is provided at a corner of the second rod member 12. The corner of the second rod member 12 has a curved shape at the ground point 121. As shown in FIG. 6, the third to sixth rod members 13-16 are arranged in a spiral shape so as to surround the periphery of the first rod member 11 in a top view.

[0022] The third rod member 13 is connected to the first rod member 11. A notch 21 is provided in at least one of the third rod member 13 and the first rod member 11, and the third rod member 13 is connected to the first rod member 11 at the notch 21. The third rod member 13 extends in a direction intersecting with the first rod member 11. The third rod member 13 extends obliquely downward from the first rod member 11.

[0023] The fourth rod member 14 is connected to the third rod member 13. A notch 22 is provided in at least one of the fourth rod member 14 and the third rod member 13, and the fourth rod member 14 is connected to the third rod member 13 at the notch 22. The fourth rod member 14 extends in a direction intersecting with the third rod member 13. The fourth rod member 14 extends obliquely downward from the third rod member 13.

[0024] The fifth rod member 15 is connected to the fourth rod member 14. A notch 23 is provided in at least one of the fifth rod member 15 and the fourth rod member 14, and the fifth rod member 15 is connected to the fourth rod member 14 at the notch 23. The fifth rod member 15 extends in a direction intersecting with the fourth rod member 14. The fifth rod member 15 extends obliquely downward from the fourth rod member 14.

[0025] The sixth bar member 16 is connected to the fifth bar member 15. A notch 24 is provided in at least one of the sixth bar member 16 and the fifth bar member 15, and the sixth bar member 16 is connected to the fifth bar member 15 at the notch 24. The sixth bar member 16 extends in a direction intersecting with the fifth bar member 15. The sixth bar member 16 extends obliquely downward from the fifth bar member 15.

[0026] The second bar member 12 is connected to the sixth bar member 16. A notch 25 is provided in at least one of the second bar member 12 and the sixth bar member 16, and the second bar member 12 is connected to the sixth bar member 16 at the notch 25. The second bar member 12 extends in a direction intersecting with the sixth bar member 16. The second bar member 12 extends obliquely downward from the sixth bar member 16.

[0027] 6, the third rod member 13 includes a first extension portion 27 extending outward from the fourth rod member 14. The fourth rod member 14 includes a second extension portion 28 extending outward from the fifth rod member 15. The second rod member 12 includes a third extension portion 29 extending outward from the sixth rod member 16. Note that "outward" refers to the direction away from the rotation axis A1.

[0028] As shown in Figs. 2 and 6, the top 1 includes a plurality of weights 31-33. The weights 31-33 are disposed inside specific rod members among the rod members 11-16. The weights 31-33 are cylindrical in shape. The weights 31-33 are made of brass, for example. However, the weights 31-33 may be made of other materials such as lead or tungsten. In the top 1, the position, weight, and length of the weights are set so that the maximum principal axis of inertia A2 coincides with the rotation axis A1.

[0029] In detail, the multiple weights 31-33 include a first weight 31, a second weight 32, and a third weight 33. The first weight 31 is disposed inside the third rod member 13. As shown in FIG. 6, the first weight 31 is disposed inside the first extension portion 27 of the third rod member 13. The second weight 32 is disposed inside the fourth rod member 14. The second weight 32 is disposed inside the second extension portion 28 of the fourth rod member 14. The third weight 33 is disposed inside the second rod member 12. The third weight 33 is disposed inside the third extension portion 29 of the second rod member 12.

[0030] As shown in FIG. 6, the first to third weights 31-33 are arranged so that they pass through the vertices of a triangle 100 whose center of gravity is the position of the rotation axis A1 when viewed from the direction in which the rotation axis A1 extends, i.e., when viewed from above. The lengths of the first to third weights 31-33 are different from each other. The first weight 31 is shorter than the second weight 32. The first weight 31 is longer than the third weight 33. The lengths of the first to third weights 31-33, i.e., the weights of the first to third weights 31-33, are set so that the maximum principal axis of inertia A2 coincides with the rotation axis A1 in the above-mentioned arrangement of the first to sixth rod members 11-16 and the arrangement of the first to third weights 31-33. The center of gravity G1 of the top 1 is located below the first rod member 11 on the rotation axis A1.

[0031] FIG. 8 is a cross-sectional view of the first rod member 11. As shown in FIG. 8, the first rod member 11 includes a hole 41. The hole 41 extends in the axial direction of the first rod member 11. No weight is disposed in the hole 41 of the first rod member 11. The first rod member 11 has a hollow portion 44. The first rod member 11 includes a first end 42 and a second end 43. The hole 41 of the first rod member 11 is closed at the first end 42. The hole 41 of the first rod member 11 is open at the second end 43.

[0032] The hole 41 of the first rod member 11 is closed by a lid 51. The lid 51 is fixed to the second end 43 by, for example, adhesion. Alternatively, the lid 51 may be fixed to the second end 43 by other fixing means such as fitting. The gap between the lid 51 and the edge of the hole 41 may be blocked by filling with putty. Also, the lid 51 and the edge of the hole 41 may be painted so that the presence of the lid 51 is not noticeable from the outside.

[0033] The fifth rod member 15 and the sixth rod member 16 have the same structure as the first rod member 11. That is, the fifth rod member 15 and the sixth rod member 16 are hollow and have holes. No weights are placed in the holes of the fifth rod member 15 and the sixth rod member 16. The hole of the fifth rod member 15 is closed by a lid 55. The hole of the sixth rod member 16 is closed by a lid 56.

[0034] FIG. 9 is a cross-sectional view of the third rod member 13. As shown in FIG. 8, the third rod member 13 is hollow and includes a hole 45. The hole 45 extends in the axial direction of the third rod member 13. The first weight 31 is disposed in the hole 45 of the third rod member 13. The third rod member 13 includes a first end 46 and a second end 47. The hole 45 of the third rod member 13 is closed at the first end 46. The hole 45 of the third rod member 13 is open at the second end 47. As shown in FIG. 6, the second end 47 is located closer to the rotation axis A1 than the first end 46.

[0035] The first weight 31 is provided at the first end 46. The first weight 31 is fixed to the bottom of the hole 45. The first weight 31 is fixed to the bottom 48 of the hole 45 by, for example, gluing. Alternatively, the first weight 31 may be fixed to the bottom 48 of the hole 45 by other fixing means such as fitting. The third rod member 13 includes a hollow portion 49 in which no weight is disposed. A lid 53 is attached to the second end 47. The lid 53 closes the hole 45 of the third rod member 13. The lid 53 is disposed facing the hollow portion 49.

[0036] The fourth rod member 14 and the second rod member 12 have the same structure as the third rod member 13. That is, the second weight 32 is disposed in a hole of the fourth rod member 14. The fourth rod member 14 includes a hollow portion where the second weight 32 is not provided. The lid 54 of the fourth rod member 14 is provided at an end portion closer to the rotation axis A1. The third weight 33 is disposed in a hole of the second rod member 12. The second rod member 12 includes a hollow portion 49 where the third weight 33 is not provided. The lid 52 of the second rod member 12 is provided at an end portion closer to the rotation axis A1.

[0037] The top 1 according to the present embodiment described above rotates around the axis of rotation A1 by twisting the first rod member 11. The first to sixth rod members 11-16 are arranged asymmetrically with respect to the axis of rotation A1, so that the way they rotate can be visually enjoyed. On the other hand, if the first to sixth rod members 11-16 are arranged asymmetrically with respect to the axis of rotation A1, it is difficult to balance the top 1. However, in the top 1 according to the present embodiment, weights 31-33 are arranged inside the second, third and fourth rod members 12, 13 and 14, and the positions, weights and lengths of these weights 31-33 are set so that the maximum principal axis of inertia A2 coincides with the axis of rotation A1. This allows the top 1 to rotate stably for a long time.

[0038] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.

[0039] The shape, number, or arrangement of the rod members are not limited to those in the above embodiment, and may be changed. For example, the cross section of the rod members is not limited to a square, and may be another shape. FIG. 10 is a perspective view of a top 1 according to a first modified example. As shown in FIG. 10, the cross section of the rod member 11-16 may be a regular hexagon. Alternatively, the cross section of the rod-shaped member 11-16 may be another polygon. FIG. 11 is a perspective view of a top 1 according to a second modified example. As shown in FIG. 11, the cross section of the rod member 11-17 may be a circle.

[0040] The number of rod members is not limited to 6. The number of rod members may be less than 6 or more than 6. For example, as shown in FIG. 11, the top 1 may include first to seventh rod members 11-17.

[0041] The shape, number, or arrangement of the spindles are not limited to those in the above embodiment and may be changed. The spindles are not limited to being cylindrical and may have other shapes. For example, as shown in FIG. 10, the spindles 31-33 may be prismatic. The number of spindles is not limited to three. The number of spindles may be less than three or more than three. For example, as shown in FIG. 11, the top 1 may include first to fourth spindles 31-34.

[0042] Fig. 12 is a top view of the top 1 according to the second modification. As shown in Fig. 12, the first to fourth weights 31-34 may be arranged so that they pass through the vertices of a quadrangle having its center of gravity at the position of the rotation axis A1. Alternatively, multiple weights may be arranged so that they pass through the vertices of another polygon having its center of gravity at the position of the rotation axis A1. [Industrial Applicability]

[0043] According to the present invention, a top is provided which is visually enjoyable and can be stably spun for a long period of time. [Explanation of symbols]

[0044] A1: rotation axis, 11: first rod member, 12: second rod member, 31: first weight, 45: hole, 49: hollow portion, 53: lid, 46: first end portion, 47: second end portion, 13: third rod member, 14: fourth rod member, 15: fifth rod member

Claims

1. A plurality of rod members connected to each other, the rod members including a first rod member extending along a rotation axis and a second rod member including a ground point located below the first rod member on the rotation axis; A plurality of weights disposed inside at least some of the rod members; Equipped with The plurality of rod members are arranged asymmetrically with respect to the rotation axis, The plurality of weights are provided so that the maximum principal axis of inertia coincides with the rotation axis. top.

2. The second rod member has a curved shape at the ground contact point.

2. The top according to claim 1.

3. The plurality of rod members have linear shapes extending in directions intersecting each other.

3. A top according to claim 1 or 2.

4. the plurality of rod members includes a specific rod member, The specific rod member includes a hole extending in an axial direction of the specific rod member, The weight is disposed in the hole, The specific rod member includes a hollow portion in which the weight is not disposed. A top according to any one of claims 1 to 3.

5. The particular rod member includes a lid that closes the hole, The lid is disposed facing the hollow portion.

5. The top according to claim 4.

6. The specific rod member is A first end portion; a second end located closer to the axis of rotation than the first end; Including, The lid is provided at the second end. The top according to claim 5.

7. the plurality of rod members includes a specific rod member having the weight disposed therein; The specific rod member is A first end portion; a second end located closer to the axis of rotation than the first end; Including, The weight is provided at the first end. A top according to any one of claims 1 to 3.

8. When viewed from a direction in which the rotation axis extends, the plurality of weights are disposed so as to pass through vertices of a polygon having a center of gravity located at the position of the rotation axis. A top according to any one of claims 1 to 7.

9. The plurality of rod members are hollow. A top according to any one of claims 1 to 8.

10. The plurality of rod members are square rods. A top according to any one of claims 1 to 9.

11. The plurality of rod members include a third rod member connected to the first rod member and extending in a direction intersecting the first rod member; a fourth rod member connected to the third rod member and extending in a direction intersecting the third rod member; a fifth rod member connected to the fourth rod member and extending in a direction intersecting the fourth rod member; Further comprising: A top according to any one of claims 1 to 10.

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