Amusement devices: toys – Rotating or having visible rotating portion – Top
Patent
1986-06-12
1987-09-22
Kannan, Philip C.
Amusement devices: toys
Rotating or having visible rotating portion
Top
446264, A63H 2700
Patent
active
046952632
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a toy spinning top of the type defined in detail in the preamble of claim 1.
Prior art toy spinning tops are known in which the lower end of their shaft is simply inserted into a corresponding recess in the generally cone shell shaped support base for the top. The resulting friction lock connection serves to more or less securely fasten these two parts together.
Pursuant to new safety regulations, the support base must be connected with the top shaft in a manner secure against removal so as to reduce the danger of injury in handling such a toy. For this purpose, the recess in the cone shell is extended into a passage opening through which the outer end of the top shaft is pushed. From the underside of the support base, a spring ring is pushed onto the end of the shaft. To make the top safe against removal not only in the direction of the cone tip but also in the direction of the ccone base, a radially outwardly extending projection--for example a pinched-on portion--is provided at the shaft of the top. To make this radial projection effective over the entire circumference of the shaft, a washer is disposed between the plastic base and the pinched-on portion. On its side facing the placement surface of the top, the spring ring is provided with a hat-like covering hood which protects the push-through end of the top shaft against manipulation.
The drawback of this manner of fastening is that the fastening elements are still openly accessible at the exterior of the base. Thus it is possible, for example, to wiggle off the spring ring and remove the base. Moreover, a danger of injury may still exist from the fastening members which project radially beyond the shaft outside the base.
It is the object of the invention to make the fastening of the top shaft in the base even more secure against removal and to exclude any danger of injury.
This is accomplished according to the characterizing feature of claim 1. By encasing the spring ring on all sides with the plastic material of the base, the spring ring is secured against displacement with respect to the base in both axial directions. In connection with the encasing of the spring ring in the plastic material of the base, the presence of the covering hood of the spring ring out to be a significant production aid. Together with the spring ring, the covering hood forms a cavity which during injection molding of the base remains essentially free of plastic material. Thus the later insertion of the top shaft into the spring ring is facilitated. It is assured that the end of the top shaft is pushed through to the abutment in the interior of the hat-like covering hood. The top shaft thus safely and accurately reaches its intended position with respect to the spring ring. Molding the upper side of the spring ring to the plastic material of the base results in a firmly adhering connection between the spring ring and the plastic material which is known to have a certain inherent elasticity. Since molding the spring ring takes place when the ring is in its relaxed starting position, this adhesive connection generates a resetting force which additionally acts on the spring ring and increases the clamping pressure exerted on the top shaft by the spring ring. The relatively large area of the covering hood provides an excellent protection against the top shaft piercing the base. During assembly, the top shaft is inserted into the base and thus into the spring ring from the top through the preferably rotationally axially disposed recess that has been produced during the injection molding process. The spring ring, together with the hat-shaped cover, acts as protection against displacement of the base with respect to the axis of rotation of the top, a protection which is effective on both sides.
The base fastening structure according to the invention thus includes no externally disposed fastening elements. Thus, any danger of injury is avoided right from the start. Additionally, the fastening elements thus lie outside of the range of any possible manipulati
REFERENCES:
patent: 1262061 (1918-04-01), Kristofer
patent: 1267558 (1918-05-01), Komorous
patent: 2394093 (1946-02-01), Nalle, Jr.
patent: 2639921 (1953-05-01), Saunders
patent: 3083498 (1963-04-01), Kelley
Kannan Philip C.
Lorenz Bolz GmbH & Co.
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