Baitcaster with internal gear set

1. A baitcaster for retrieving a fishing line, the baitcaster comprising:

a housing;

a spool positioned at least partially within the housing, defining an inner volume, and comprising a spindle; and

a compound gear set positioned at least partially within the inner volume of the spool, the compound gear set configured to receive input mechanical energy from a first shaft and transfer output mechanical energy through a second shaft to drive the spool and thereby retrieve the fishing line;

wherein the spindle is positioned centrally within the inner volume of the spool, the spindle fixedly coupled with the spool through a central member, the central member extending radially outwards from the spindle and dividing the inner volume into a first inner volume and a second inner volume, the spool further comprising:

a straight portion;

a first curved portion positioned at a first end of the straight portion;

a second curved portion positioned at a second end of the straight portion;

wherein a transition between the straight portion and the first curved portion divides the first inner volume into a first sub-volume and a second sub-volume;

wherein the compound gear set comprises:

a ring gear;

a plurality of input planet gears;

a plurality of output planet gears; and

a carrier configured to support the plurality of input planet gears and the plurality of output planet gears.

2. The baitcaster of claim 1 , wherein the spool is positioned between a first frame member and a second frame member, the spool rotatably supported by the first frame member and the second frame member.

3. The baitcaster of claim 1 , wherein the first shaft and the second shaft are concentrically aligned along an axis of the baitcaster, wherein:

the ring gear extends through the first sub-volume and terminates in the second sub-volume;

the plurality of input planet gears are positioned at least partially within the first sub-volume and the second sub-volume;

the plurality of output planet gears are positioned entirely within the second sub-volume; and

the carrier is positioned entirely within the second sub-volume.

4. The baitcaster of claim 1 , wherein the compound gear set is configured to:

receive input mechanical energy from the first shaft at the ring gear;

drive the input planet gears through an engagement between the input planet gears and the ring gear;

drive the output planet gears through a rotatable coupling between the input planet gears and the output planet gears;

drive the spool through an engagement between the second shaft and the output planet gears, wherein the second shaft is coupled with the spool at an opposite end of the spool.

5. The baitcaster of claim 1 , wherein the compound gear set is positioned at a handle end of the baitcaster and the spool is driven through a coupling at an opposite end of the baitcaster.

6. A fishing rod comprising:

a rod; and

a baitcaster fixedly coupled with the rod, the baitcaster configured to retrieve a fishing line that extends along the rod, the baitcaster comprising:

a housing;

a spool positioned at least partially within the housing, defining an inner volume, and comprising a spool shaft; and

a compound gear set positioned at least partially within the inner volume of the spool, the compound gear set configured to receive input mechanical energy from an input shaft and transfer output mechanical energy to the spool through an output shaft and the spool shaft to drive the spool to retrieve the fishing line;

wherein the spool shaft is positioned centrally within the inner volume of the spool, the spool shaft fixedly coupled with the spool through a central member, the central member extending radially outwards from the spool shaft and dividing the inner volume into a first inner volume and a second inner volume, the spool further comprising:

a straight portion;

a first curved portion positioned at a first end of the straight portion;

a second curved portion positioned at a second end of the straight portion;

wherein a transition between the straight portion and the first curved portion divides the first inner volume into a first sub-volume and a second sub-volume;

wherein the compound gear set comprises:

a ring gear;

a plurality of input planet gears;

a plurality of output planet gears;

a carrier configured to support the plurality of input planet gears and the plurality of output planet gears; and

an output shaft.

7. The fishing rod of claim 6 , wherein the spool is positioned between a first frame member and a second frame member, the spool rotatably supported by the first frame member and the second frame member.

8. The fishing rod of claim 6 , wherein the input shaft and the output shaft are concentrically aligned along an axis of the baitcaster, wherein:

the ring gear extends through the first sub-volume and terminates in the second sub-volume;

the plurality of input planet gears are positioned at least partially within the first sub-volume and the second sub-volume;

the plurality of output planet gears are positioned entirely within the second sub-volume; and

the carrier is positioned entirely within the second sub-volume.

9. The fishing rod of claim 6 , wherein the compound gear set is configured to:

receive input mechanical energy from the input shaft at the ring gear;

drive the input planet gears through an engagement between the input planet gears and the ring gear;

drive the output planet gears through a rotatable coupling between the input planet gears and the output planet gears;

drive the spool through an engagement between the output shaft and the output planet gears, wherein the output shaft is coupled with the spool at an opposite end of the spool.

10. The fishing rod of claim 6 , wherein the compound gear set is positioned at a handle end of the baitcaster and the spool is driven through a coupling at an opposite end of the baitcaster.

11. A gear set for a baitcaster, the gear set comprising:

a ring gear;

a plurality of input planet gears configured to engage with the ring gear;

a plurality of output planet gears rotatably coupled with the plurality of input planet gears;

a carrier configured to support the plurality of input planet gears and the plurality of output planet gears; and

an output shaft configured to drive a spool of the baitcaster;

wherein the gear set is positioned at least partially within an inner volume of the spool of the baitcaster at a first end of the baitcaster and configured to receive an input torque through a handle at the first end of the baitcaster and drive the spool through a coupling between the output shaft and the spool at a second end of the baitcaster.

12. The gear set of claim 11 , wherein the spool comprises a spool shaft, a straight portion, a first curved portion, and a second curved portion, positioned centrally within the inner volume, the spool shaft fixedly coupled with the straight portion through a central member extending radially between the spool shaft and the straight portion.

13. The gear set of claim 12 , wherein the central member divides the inner volume into a first inner volume and a second inner volume and a transition between the straight portion and the first curved portion divides the first inner volume into a first sub-volume and a second sub-volume.

14. The gear set of claim 13 , wherein:

the ring gear extends through the first sub-volume and terminates in the second sub-volume;

the plurality of input planet gears are positioned at least partially within the first sub-volume and the second sub-volume;

the plurality of output planet gears are positioned entirely within the second sub-volume; and

the carrier is positioned entirely within the second sub-volume.

15. The gear set of claim 11 , wherein the gear set is configured to:

receive input mechanical energy from the input shaft at the ring gear;

drive the input planet gears through an engagement between the input planet gears and the ring gear;

drive the output planet gears through a rotatable coupling between the input planet gears and the output planet gears;

drive the spool through an engagement between the output shaft and the output planet gears, wherein the output shaft is coupled with the spool at the second opposite end of the spool.

16. The gear set of claim 11 , wherein the output shaft extends centrally through the spool shaft and selectably rotatably couples with the spool shaft at the second end of the spool shaft.