| 摘要 |
A track-type sex aid includes a track 2 having an outer periphery 23 and an inner periphery 22. The track includes a plurality of protrusions 21 on the outer periphery of the track. An annular transmission device 1 includes first 11 and second wheels 13 rotatably mounted in a space defined by the inner periphery of the track. The first wheel includes a shaft directly or indirectly coupled to a driving shaft of a power output mechanism 12 of the annular transmission device, with the first wheel directly or indirectly driving the track. There may be a third wheel 14 which is larger than the other two. The sex aid may have a housing provided in two halves 3, 4 which connect together with an annular gap for the track (see figure 1). |
