Abstract A bicycle change gear transmission according to which one end of a shift lever is secured to a winding drum to which one end of an inner wire connected to the change gear transmission is secured while a clutch drum is secured to the other end of said shift lever, and a rotary gear is interlocked with a motor through the intervention of a transmission gear train. Furthermore, a clutch spring has one end secured to the inner side face of said rotary gear and wound around the clutch drum, a control switch mechanism being mounted adjacent one handle of the bicycle handle bar while a spacer is located contiguously with said rotary gear and has a control plate provided with a set of contact pieces respectively having corresponding slots and projections and connected to said control switch mechanism through separate circuits, two operating switches being provided in said control switch mechanism and connected respectively to a driving circuit and a braking circuit so that the shift lever may be automatically displaced to its predetermined positions by operating said switches selectively.
A bicycle speed change gear shifting device comprising: a bicycle handle having at least one grip therewith, a change gear mechanism, a shift lever secured at one side to a winding drum to which one end of an inner wire connected to the change gear mechanism is secured, a clutch drum secured integrally to the other side of said shift lever, a rotary gear loosely fitted to the free end of the clutch drum, said rotary gear being interlocked with a motor through a transmission gear train, a clutch spring secured at its one end to the inner side face of the rotary gear and wound round the clutch drum, a control switch mechanism mounted adjacent one grip of the bicycle handle, a spacer having a control plate provided with a set of contact pieces respectively having corresponding slots and projections and connected to said control switch mechanism through separate circuits, said spacer being located contiguous to said rotary gear, a brush mounted to said shift lever in such a position as to be contacted with said contact pieces, and two operating switches provided in said control switch mechanism and connected respectively to a driving circuit and a braking circuit so that the shift lever may be automatically displaced to its predetermined positions by operating said switches selectively.
Claim 2
Dependent Claim
218 words
A bicycle speed change gear shifting device comprising: a bicycle handle having at least one grip therewith, a change gear mechanism, a shift lever secured at one side to a winding drum to which one end of an inner wire connected to the change gear mechanism is secured, a clutch drum secured integrally to the other side of said shift lever, a rotary gear loosely fitted to the free end of the clutch drum, said rotary gear being interlocked with a motor through a transmission gear train, a clutch spring secured at its one end to the inner side face of the rotary gear and wound round the clutch drum, a control switch mechanism mounted adjacent one grip of the bicycle handle, a spacer having a control plate provided with a set of contact pieces respectively having corresponding slots and projections and connected to said control switch mechanism through separate circuits, said spacer being located contiguous to said rotary gear, a brush mounted to said shift lever in such a position as to be contacted with said contact pieces, and two operating switches provided in said control switch mechanism and connected respectively to a driving circuit and a braking circuit so that the shift lever may be automatically displaced to its predetermined positions by operating said switches selectively.