Abstract The invention is directed to a music box spring drive mechanism comprising a wheel that has a bevel gear on an outer peripheral edge with an inner recess that has ratchet teeth on its peripheral wall of the recess, a spring winding axle cooperates with the wheel to provide a drive for a music making cylinder. A pawl member is centrally located in the recess of the wheel and cooperates with the ratchet teeth to drive the wheel. The pawl comprises a body portion having a thickness corresponding to the depth of the recess, a resilient arcuated portion integrally formed with the body portion with teeth formed on the end of the arcuated portion. The teeth are provided with a first contact portion and a second contact portion which are in contact with a ratchet tooth formed along the inner wall of the recess.
A music box spring drive mechanism comprising: a wheel including a lower surface and an upper surface, a recess having an inner peripheral wall found in said lower surface, said recess having ratchet teeth formed along the inner peripheral wall, said upper surface including a peripheral edge having a bevel gear formed therealong; a spring winding axle having one end of a spring connected thereto, the other end of said spring being connected to a fixed portion of said music box; and a pawl member located within said pawl member having a body portion connection to said axle rotation therewith, a resilient arcuate pawl portion formed integrally with said body portion, said pawl portion having teeth means thereon for engagement with said ratchet teeth.
Claim 2
Dependent Claim
124 words
A music box spring drive mechanism comprising: a wheel including a lower surface and an upper surface, a recess having an inner peripheral wall found in said lower surface, said recess having ratchet teeth formed along the inner peripheral wall, said upper surface including a peripheral edge having a bevel gear formed therealong; a spring winding axle having one end of a spring connected thereto, the other end of said spring being connected to a fixed portion of said music box; and a pawl member located within said pawl member having a body portion connection to said axle rotation therewith, a resilient arcuate pawl portion formed integrally with said body portion, said pawl portion having teeth means thereon for engagement with said ratchet teeth.
Claim 3
Dependent Claim
45 words
A music box spring drive mechanism as defined in claim 1, wherein said teeth means is provided with a first contacting portion and a second contacting end portion so that said contacting portions are in contact with said ratchet teeth in a floating condition, respectively.
Claim 4
Dependent Claim
42 words
A music box spring drive mechanism as defined in claim 1 or 2, wherein said pawl member is made of synthetic resin, and said first and second contacting portions have a width corresponding to the depth of the recess of said wheel.