CN101310806B - toy top - Google Patents

Abstract

A toy top includes a body portion having a circumferential groove for winding a portion of a cord for spinning the top. The top is rotated about its axis of rotation and is shaped such that the slot is at or near its centre of gravity. The body part comprises an inner shaft extending along the inside of the body part and an outer shaft extending from the body part, a string being connected to a sleeve connected to the top end of the outer shaft, the string being rotatably connected to the body part, the body part being provided with weapons with which players can engage in top combat. The toy gyroscope has lasting rotating time and is more interesting.

Description

toy top

technical field

The invention relates to a toy top, in particular to a toy top that is twitched by a string.

Background technique

In the prior art, the performance of a toy top that is swung by a string can be improved by setting the position of its center of gravity and the position where the string is wound. However, as for where the center of gravity of the gyroscope is located and where the winding position of the wire rope can make the performance of the gyroscope optimal, there is no specific and feasible method for determining the position of the center of gravity of some gyroscopes. In higher places, some are set in lower places. The design of tops is mostly determined by repeated tests, so it is difficult to ensure that the designed tops can have better performance, and it is difficult to ensure that the tops can rotate for a long time. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a toy top with good performance and long spinning time.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is to design and manufacture a toy top, comprising:

a main body portion that is axially symmetric and radially asymmetric about the axis of rotation;

a point at the bottom of the body part;

a top piece extending from the body portion and protruding from its top end; and

a cord extending from the top member spaced from the top end of the main body portion;

the top part is connected to the body part and the cord is connected to the top part such that at least the body part is rotatable relative to the cord;

said top includes a center of gravity on an axis of rotation within said body portion, the center of gravity being closer to the tip of the body portion than the tip, and closer to the tip than the tip of the top member; and

The body portion includes a circumferentially extending slot at or adjacent to the center of gravity; the slot is configured to accommodate multiple turns of the cord.

In one embodiment, the center of gravity of the top is located closer to the top of the body portion than the tip.

The toy top of the present invention may also include a weapon attached to said body part, said weapon being at least axially symmetrical with respect to the axis of rotation, the center of gravity of the top with the weapon attached being located on the axis of rotation within said body part , which is closer to the tip of the top member than the tip, and the groove extending circumferentially along the body portion is at or adjacent to the center of gravity.

The weapon may be one or more pieces, and the weapon may be detachably connected to the main body.

In some embodiments, the top member is non-rotatably connected to the body portion and the cord is rotatably connected to the top member.

The top member includes an outer shaft non-rotatably connected to the main body, and a sleeve rotatably connected to the outer shaft.

In some embodiments, an inner shaft extending along the interior of the body portion is further included, the inner shaft is non-rotatably connected to the body portion. Instead, the tip may comprise a ball rotatably attached to the bottom of the inner shaft.

The top member includes an outer shaft non-rotatably connected to the inner shaft, and the combination of the outer shaft and the inner shaft is non-rotatably connected to the body portion. The tip is now rotatably connected to the lower end of the inner shaft.

In some embodiments, the ratio of the first distance from the tip of the top member to the center of gravity to the second distance from the tip to the center of gravity is greater than one. In one embodiment, the ratio is 1.4:1.

Compared with the prior art, the toy top of the present invention can effectively improve the rotation performance of the top by setting its center of gravity and setting the winding position of the cord on the circumference at or near the center of gravity, so that the top can be used for a long time rotate continuously.

Description of drawings

Figure 1 is a perspective view from the top of a toy top in one embodiment of the present invention, which includes a weapon attached to the top, a string wrapped in a slot in the top, but without the head.

Figure 2 is a side view of the spinning top shown in Figure 1, without arms and lines, but with a head.

Fig. 3 is a cross-sectional view along the axis of the top of Fig. 2, showing the configuration when the wire is not wound in the slot.

Figure 4 is a perspective view from the bottom of the top of Figure 1, without the head and without the wire wrapped in the slot.

Figure 5 is a perspective view from the top of the toy top shown in Figure 1, ready to be spun, showing a person's hand grasping the top with the cord wrapped in the slot and around the person's wrist.

Figure 6 is a side view of the spinning top shown in Figure 1, without the head, and spinning in a plane of rotation after being flung, with its cord held by a person's hand.

Detailed ways

Below in conjunction with the best embodiment shown in the accompanying drawings, it will be further described in detail.

In the embodiment shown in the drawings, the toy top 10 comprises a body portion 12 including a circumferentially extending groove 14; a tip 16 mounted on the bottom 18 of the body portion 12; The top end 22 extends from an outer shaft body 20 . A sleeve 24 is attached to the top of the outer shaft 20 and a wire 26 is attached to the sleeve 24 . As shown in the cross-sectional view of FIG. 3 , the body portion 12 includes a cavity 28 and an inner shaft 30 extending from the tip 16 to the top end 22 of the body portion 12 . The outer and inner shafts 20 and 30 may be solid or hollow. In this embodiment, the shafts 20 and 30 are solid.

More specifically, the tip 16 is relatively rotatably mounted to the body 12 , while the outer shaft 20 is non-rotatably connected to the body portion 12 . After the top 10 is swung to rotate on a flat surface 32 (as shown in FIG. 6 ) such as a floor, a sidewalk, a road surface, a desktop, etc., the external shaft body 20 and the top 10 rotate together.

As shown in FIGS. 1 , 3-6 , the top 10 may also include a weapon 34 that is detachably or non-detachably assembled to the body portion 12 . The weapon 34 will assist in adjusting the center of gravity of the top, and different weapons may form different center of gravity positions, for example, so that the above-mentioned ratio of the first distance to the second distance is in the range of 1.4:1 to 1.5:1. In one embodiment, the weapon 34 positions the center of gravity of the top at such a ratio of the first distance to the second distance described above of 1.4:1. The weapon 34 can be pitted against other tops as part of a game or competition. The weapon 34 extends circumferentially of the body portion 12 and fits into a circumferentially extending groove 36 (shown in FIG. 3 ) to facilitate installation and detachment. Figure 2 shows an alternative embodiment of top 10 without weapon 34, in this embodiment the center of gravity of the top is as described above. In an embodiment where the weapon 34 is detachable, one or more weapons (not shown) may be attached to the top 10 at the location of the weapon 34 in addition to the weapon 34 shown in the figures.

The top 10 has an axis of rotation 38 about which the body portion 12 is axially symmetric and radially asymmetric. The weapon 34 is also symmetrical about the axis of rotation 38 .

The main body portion 12 is generally part-conical, but other axially symmetrical shapes are possible. As shown in FIG. 3 , the inner shaft 30 is non-rotatably connected to or adjacent to the bottom 18 of the main body portion 12 . Top end 22 of body portion 12 includes an inner annular recess 40 for receiving a generally dish-shaped disc 42 (see FIG. 3 ). The disc 42 has a central hole 44 at a circular protrusion 46 through which the outer shaft body 20 can pass. The disk 42 is attached to the top end 22 of the body part 12 by screws 48 . An annular weight 52 is provided in an outer annular recess 50 below said disc 42 . The inner shaft body 30 is fixedly connected with the outer shaft body 20 , and both the inner shaft body 30 and the outer shaft body 20 are non-rotatably fixed on the main body part 12 .

The bottom end 56 of the inner shaft 30 includes a recess 58 for receiving and rotatably connecting the tip 16 . In this embodiment, the recess 58 is hemispherical, the tip 16 is a sphere, the diameter of the sphere is slightly smaller than the diameter of the inner shaft 30, and the depth of the recess 58 is slightly smaller than the diameter of the sphere , so that the ball is rotatably confined within the inner shaft and protrudes slightly so that the ball can rotate relatively there.

In the illustrated embodiment, the outer shaft 20 is non-rotatably connected to the body portion 12, as described above. The wire rope is rotatably connected with the outer shaft body. For example, the cord is rotatably connected to a sleeve that is rotatably or non-rotatably connected to the outer shaft, or the cord is non-rotatably connected to a sleeve that is rotatably connected to the outer shaft body connection.

The outer shaft 20 can be enclosed by a sleeve, or a head 62 can be attached to the shaft. According to needs, the head can be rotatably or non-rotatably connected to the outer shaft body 20 . In one embodiment, the head 62 is loosely connected to the shaft body 20 so that the head 62 can rotate relative to each other. In order to produce desired visual effects when the top 10 rotates, the head 62 can be decorated with graphics, colors or other decorations, and the movement of the head 62 can add animation effects to the spinning top. For example, the head may depict a face whose appearance or expression changes as the head 62 is rotated. In one embodiment, the head 62 is in the shape of a ring (as shown in FIG. 5 ), and is provided with a hole for loose fitting with the outer shaft body 20 . In another embodiment, the head 62 may be disc-shaped (as shown in FIG. 3 ) with a hole that loosely fits the outer shaft 20 . The head 62 may also take other shapes, such as disc-like, spherical, conical, part-conical, tubular, and other shapes.

A sleeve 24 is connected to the free or upper end of the outer shaft 20 , with the free end of the sleeve extending beyond the upper end of the shaft 20 . The sleeve 24 is provided with a hole 66 on the outer shaft body 20, and the wire 26 is passed through the hole and then knotted to connect the wire 26 with the sleeve. As shown in FIG. 5 , the free end of the cord 26 includes a loop 68 similar to a slipknot at the free end of a yo-yo cord, and the loop 68 should be able to fit around a person's wrist. In the top view of the gyro swing shown in FIG. All strands 26 are wound into slot 14 . After spinning the top, as shown in Figure 6, a person holds the cord with his or her thumb and forefinger while the free end of the cord is looped around the person's wrist.

In general, as noted above, in the illustrated embodiment, the inner shaft 30 is fixedly connected relative to the body portion 12 and the tip is rotatable relative to the inner shaft 30 such that the body portion And the inner shaft can rotate independently relative to the tip. The outer shaft 20 is also fixedly connected to the main body and the inner shaft, and the sleeve 24 is rotatably connected to the outer shaft 20, so that the main body 12, the outer shaft 20 and the sleeve 24 can rotate together or rotate independently of each other.

As mentioned above, the head 62 is loosely mounted to the outer shaft 20 between the boss 46 and the sleeve 24 because the boss 46 and the outer shaft 20 rotate with the main body 12, And the head 62 is in contact with said protrusion 46 and the outer shaft 20, so that when the main body part 12 rotates, the head 62 will rotate under their influence.

The body portion 12 (including the cavity 28), the weapon 34, the inner shaft 30, the dish 42, the ring weight 52, the outer shaft 20, the head 62, the sleeve 24 and the tip 16 form the shape of the top 10. The desired weight (mass) and weight (mass) distribution, as well as the aforementioned center of gravity or center of mass 70 on the axis of rotation 38 at or adjacent to the slot 14 (see FIG. 3 ). The size (construction), location and weight of these components are selected to create the desired weight and weight distribution. Moreover, material selection for certain components must consider not only the above factors, but also wear, durability and friction factors. For example, tip 16 may be made of steel or other hard, low friction, durable material. This makes it easy to move and guide the top 10 in the desired direction by pulling on the cord 26, even on an inclined surface. Described axle body 20 and 30, disc 42, head 62 and sleeve 24 can adopt suitable metal to make, for example, brass or red copper; Ring weight 52 can adopt steel or zinc to make, and main body 12 And disc 42 can adopt hard, durable plastics such as ABS to make.

The location of the center of gravity 70 is shown in FIG. 3 , and in one embodiment it is a distance "a" from the top of the sleeve 24 and a distance "b" from the bottom of the tip 16 . In the embodiment shown in the figures, it can be seen that when the center of gravity on the axis of rotation is positioned closer to the tip of the main body than to the tip of the top and closer to the tip of the top than the tip of the sleeve , can improve the performance of the gyroscope. When the inertia, angular momentum and center of mass of the gyro are considered, the spin time and angular velocity of the gyro can be increased or optimized. For example, the inertia I of an object is I=M _A (R _A ) ² +M _B (R _B ) ² +M _C (R _C ) ² +..., that is, M _A (R _A ) ² +M The sum of _B (R _B ) ² +M _C (R _C ) ² +..., which represents the sum of the MR ² values of all particles of an object. The total value of M _A (R _A ) ² +M _B (R _B ) ² +M _C (R _C ) ² +... depends on the mass and its distribution, and it is used for the calculation of the moment of inertia of the object with respect to the axis of rotation Determination. R _A is the distance of a particle of mass M _A from the axis of rotation, etc. (Tom.D., Advanced Physics for Hong Kong-Volume I: Materials and Mechanics, John Murry, pp.165-184, 1992.) The angular momentum L of the gyroscope is L=Iω, where ω is the angular velocity. According to the equation E=1/2MR ² ω ² +1/2Mv ² , where M is the mass, ω is the angular velocity, and v is the linear velocity, for two objects rotating at the same angular velocity, the object with the larger moment of inertia has a greater The larger the kinetic energy E, the greater the kinetic energy can increase the time of rotation. The center of gravity is a geometric property of all objects and is the average location of an object's weight. If an object has a line of symmetry (or a plane), the center of gravity lies on that line of symmetry. For a solid block of uniform material, the center of gravity is simply the average location of the actual dimensions. For a rectangular block of 50(length)×20(width)×10(height), its center of gravity is at point (25, 10, 5). (See: Glenn Research Center, National Aeronautics and Space Administration, 2006, http:www.grc.nasa.gov/www/k-12/airplane/cg.html). For example, the center of gravity of top 10 is located on its axis of rotation.

In one embodiment, the top 10 has the following dimensions: a height of 70 mm; a maximum diameter of the main body of 45 mm; a height of the main body of 38.2 mm; a height of the outer shaft of 29 mm; a distance from the center of gravity to the top of the main body of 12.8 mm; and the total weight (without cord) is 90g. In this embodiment, tip 16, shafts 20 and 30, body portion 12, disc 42, sleeve 24 and ring weight 48 may be made of the materials identified above. In such an embodiment, distance "a" is 41 mm, distance "b" is 29 mm, and the ratio a/b is 1.41:1. In the equation I = MR ² (where I is the inertia of the top and M is the mass), the moment of inertia of a top whose center of gravity is at the axis of rotation is 4,675,000 gmm ² . When the center of gravity is at or adjacent to the groove, the a/b ratio is about 1.4:1, which has been found to increase the angular velocity and kinetic energy of the top 10, thereby increasing the spin time of the top.

The cord 26 can be made of any suitable material such as nylon, cotton and the like. The depth of the slot 14 is sufficient to allow multiple windings of the wire, the number of windings being chosen such that the top is shaken properly to increase or optimize its angular velocity.

The swinging and operation of the top 10 is shown in FIGS. 5 and 6 . After the wire 26 is wound into the groove 14, as shown in FIG. 5, the top 10 can be grasped by a person's hand while the person's wrist is inserted into the loop 68 of the wire. At this point the top 10 can be released or thrown downwards while the free end of the cord 26 remains at the person's wrist. When released or thrown downwards, the unwinding action of the string 26 from the slot 14 imparts an angular velocity to the top. When the top reaches the surface it is spinning on, such as a floor, platform, or tabletop, etc., the cord 26 should be fully unrolled. With the cord 26 fully extended, the top spins on a rotating surface 32, and the cord can be pulled or guided to move or guide the top in any direction desired. People can use the top to compete, for example, compare the longest rotation time, move up the steepest slope, cross obstacles, race and fight, and for example, use the weapon 34 to attack the opponent's top to make it fall down.

The present invention has been described and illustrated above through the preferred embodiments. Without departing from the concept and protection scope of the present invention, many changes and modifications that are obvious to those skilled in the art can also be made, and the present invention is not limited The precise details of the above method or structure, because such changes and modifications will fall within the protection scope of the claims of the present invention.

Claims (14)

1. A toy top rotatable about its axis of rotation, comprising: a main body portion that is axially symmetric and radially asymmetric about the axis of rotation; a point at the bottom of the body part; a top piece extending from the body portion and protruding from its top end; and a cord extending from the top member spaced from the top end of the main body portion; the top part is connected to the body part and the cord is connected to the top part such that at least the body part is rotatable relative to the cord; said top includes a center of gravity on an axis of rotation within said body portion, the center of gravity being closer to the tip of the body portion than the tip, and closer to the tip than the tip of the top member; and The body portion includes a circumferentially extending slot at or adjacent to the center of gravity; the slot is configured to accommodate multiple turns of the cord. 2. The spinning top according to claim 1, further comprising a weapon connected to said main body, said weapon being axially symmetrical at least with respect to the axis of rotation, the center of gravity of the spinning top with the weapon attached, located at The axis of rotation within the body portion is closer to the tip of the top member than the tip, and the groove extending circumferentially along the body portion is at or adjacent to the center of gravity. 3. The spinning top according to claim 2, characterized in that: said weapon has one piece. 4. The spinning top according to claim 2, characterized in that: said weapon has multiple pieces. 5. The spinning top of claim 2, wherein the arm is detachably attached to the main body. 6. The top of claim 1, wherein said top member is non-rotatably connected to said body portion. 7. The top of claim 6, wherein said cord is rotatably connected to said top member. 8. The top of claim 1, wherein said top member includes an outer shaft non-rotatably connected to the main body, and a sleeve rotatably connected to said outer shaft. 9. The spinning top of claim 1, further comprising an inner shaft extending along the interior of the main body, the inner shaft being non-rotatably connected to the main body. 10. The spinning top of claim 9, wherein said tip comprises a ball rotatably connected to the bottom of said inner shaft. 11. The top of claim 9, wherein said top member includes an outer shaft non-rotatably connected to said inner shaft, the combination of said outer shaft and inner shaft being non-rotatable connected to the main body. 12. The top of claim 11, wherein the tip is rotatably connected to the lower end of the inner shaft. 13. The spinning top of claim 1, wherein the ratio of the first distance from the tip of the top member to the center of gravity to the second distance from the tip to the center of gravity is greater than 1. 14. The top of claim 1, wherein the ratio of the first distance from the tip of the top member to the center of gravity to the second distance from the tip to the center of gravity is 1.4:1.

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