A top toy includes a shaft part, a trunk part, and a top tip cover. The trunk part is detachably configured on the shaft part. The top tip cover is detachably configured on the shaft part at a longitudinal end. The shaft part includes a first engagement part being movably configured between a raised position and a lowered position in an axial direction and a second engagement part. The top tip includes a third engagement part being configured to be engaged by rotating in a first direction with the second engagement part to prevent the shaft part from separating from the trunk part in the axial direction. The top tip cover includes a fourth engagement part being configured to be engaged with the first engagement part to prevent the top tip cover from rotating in a second direction with respect to the shaft part.

A prefabricated tuned top and a launcher for launching the tuned top, manufactured in a small size with five components of a knob, a rim, beads, a body and a spinning spindle. The tuned top can be readily assembled by sequentially inserting and then tightening the components. The tuned top implements a changeable spinning form based on induction of a change in difference between the centripetal force and centrifugal force, generated during spinning, since the center of gravity can be eccentrically disposed freely according to the user's selection. The tuned top is prevented from being reversely loosened so it can be safely, semi-permanently, and easily enjoyable at any location. The tuned top enables accurate and stable mounting when a launcher is used, such that the top is not easily separated therefrom but is quickly launched without a launch failure, thereby providing accurate launching without the loss of spinning power.

A prefabricated tuned top and a launcher for launching the tuned top, manufactured in a small size with five components of a knob, a rim, beads, a body and a spinning spindle. The tuned top can be readily assembled by sequentially inserting and then tightening the components. The tuned top implements a changeable spinning form based on induction of a change in difference between the centripetal force and centrifugal force, generated during spinning, since the center of gravity can be eccentrically disposed freely according to the user's selection. The tuned top is prevented from being reversely loosened so it can be safely, semi-permanently, and easily enjoyable at any location. The tuned top enables accurate and stable mounting when a launcher is used, such that the top is not easily separated therefrom but is quickly launched without a launch failure, thereby providing accurate launching without the loss of spinning power.

A toy top includes a pinion gear and a locking portion. A launcher includes a rack belt and a holder. The rack belt includes an elastically deformable belt portion on which rack teeth capable of intermeshing with the pinion gear are formed. The toy top is set to the holder by intermeshing the rack teeth with the pinion gear. A rotational force is then applied to the toy top by pulling the rack belt to rotate the pinion gear. A space is formed in the holder, which is disposed in a vicinity of an intermeshing portion of the rack teeth and the pinion gear. The space allows deformation of the belt portion so that the belt portion previously attached to the holder does not interrupt setting the toy top to the holder.

A toy comprising a rotor (20), an actuator mechanism (33), and a launch device (41), wherein the rotor comprises an actuator mechanism (33), and wherein the one toy building element comprises a launch device (41) in the form of a cavity, wherein the cavity is configured for receiving the actuator mechanism (33), and wherein the actuator means (50) can be inserted into a through-going slit opening (42) to cooperate with the actuator mechanism to the effect that a momentum can be transferred from the actuator means (50) to the rotor (20), whereby the rotor can be rotated and launched from the launch device, and wherein the toy comprises at least two toy building elements, of which the one toy building element (40) comprises the launch device (41), and wherein the toy building element (40) is provided with one or more of first types of coupling means (43) and the second toy building element is provided with one or more of second types of coupling means that are geometrically configured complementarily relative to the first type of coupling means, whereby the first and second types of coupling means can be interconnected to form a spatial structure comprising the launch device (41).

Component elements or component pieces of a recreational entertainment—at the rate of two active or main components and four accessories or supplements—are characterized by its unusual and original function.

Component elements or component pieces of a recreational entertainment—at the rate of two active or main components and four accessories or supplements—are characterized by its unusual and original function.

A spin speed measuring device almost free of malfunction is provided at low cost. The spin speed measuring device includes a casing, a spinning body pivotally supported in the casing, a pinion gear configured to spin together with the spinning body, a belt having a rack and a plurality of indicators, the rack being configured to mesh with the pinion gear, and a detector attached to the casing to detect the indicator passing by. The spin speed measuring device measures the spin speed of the spinning body. A spin speed of the spinning body is calculated from a time period from when one of the indicators passes by to when another one of the indicators passes by, the time period being obtained using signals output from the detector.

A spin speed measuring device almost free of malfunction is provided at low cost. The spin speed measuring device includes a casing, a spinning body pivotally supported in the casing, a pinion gear configured to spin together with the spinning body, a belt having a rack and a plurality of indicators, the rack being configured to mesh with the pinion gear, and a detector attached to the casing to detect the indicator passing by. The spin speed measuring device measures the spin speed of the spinning body. A spin speed of the spinning body is calculated from a time period from when one of the indicators passes by to when another one of the indicators passes by, the time period being obtained using signals output from the detector.

A prefabricated tuned top and a launcher for launching the tuned top, manufactured in a small size with five components of a knob, a rim, beads, a body and a spinning spindle. The tuned top can be readily assembled by sequentially inserting and then tightening the components. The tuned top implements a changeable spinning form based on induction of a change in difference between the centripetal force and centrifugal force, generated during spinning, since the center of gravity can be eccentrically disposed freely according to the user's selection. The tuned top is prevented from being reversely loosened so it can be safely, semi-permanently, and easily enjoyable at any location. The tuned top enables accurate and stable mounting when a launcher is used, such that the top is not easily separated therefrom but is quickly launched without a launch failure, thereby providing accurate launching without the loss of spinning power.