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A carrying trailer for use with bicycles includes a spine, a plurality of branch members and a wheel. The spine has a connecting portion at one end thereof which is adapted to couple to a bicycle. Each branch member has a ring and a supporting arm. The ring is rotatably mounted around the spine. One

A carrying trailer for use with bicycles includes a spine, a plurality of branch members and a wheel. The spine has a connecting portion at one end thereof which is adapted to couple to a bicycle. Each branch member has a ring and a supporting arm. The ring is rotatably mounted around the spine. One end of the supporting arm is fixed to an outer radial surface of the ring and the other end thereof extends away from an axis of the ring, with the supporting arm extending in a radial direction of the ring. The wheel pivotably couples to the other end of the spine. Consequently, positions of the branch members on the spine can be adjust to form a loading plane, or to stack the supporting arms of the branch members up at the same side of the spine for reducing storage space.

대표청구항 ▼

What is claimed is: 1. A carrying trailer for use with bicycles, comprising: a spine having a connecting portion at one end thereof, with the connecting portion being adapted to couple to a bicycle; a plurality of branch members, each of which has a ring rotatably mounted around the spine and a sup

What is claimed is: 1. A carrying trailer for use with bicycles, comprising: a spine having a connecting portion at one end thereof, with the connecting portion being adapted to couple to a bicycle; a plurality of branch members, each of which has a ring rotatably mounted around the spine and a supporting arm with one end fixed to an outer radial surface of the ring and the other end extending away from an axis of the ring, with the supporting arm extending in a radial direction of the ring; and a wheel pivotably coupling to the other end of the spine. 2. The carrying trailer for use with bicycles as defined in claim 1, wherein the spine comprises a first hollow rod having one end forming the connecting portion, a second hollow rod and a third hollow rod, with the second hollow rod having a first end fixing to another end of the first hollow rod and a second end movably extending into the third hollow rod, with the rings of the branch members being rotatably mounted around the first and third hollow rods and being able to axially move along the first and third hollow rods. 3. The carrying trailer for use with bicycles as defined in claim 1 further comprising a plurality of positioning modules mounted to the spine, with each positioning module having a positioning block fixed to an outer surface of the spine, with the positioning block having an obstructing portion at one end thereof and a retaining portion protruding from a surface thereof, with each ring having a recess formed in an inner radial surface of the ring and connecting with two end faces of the ring, with a portion of the positioning block between the obstructing portion and the retaining portion wedging in the recess of the ring and the ring being retained between the obstructing portion and the retaining portion of the positioning block. 4. The carrying trailer for use with bicycles as defined in claim 3, wherein the recess is an open-out recess and each ring further has a storing recess formed in the inner radial surface thereof and connecting with two end faces thereof, with the storing recess being close to or aligned with the supporting arm and separating from the open-out recess. 5. The carrying trailer for use with bicycles as defined in claim 4, wherein the open-out recess and the storing recess is π/2 apart in a circumference of the ring. 6. The carrying trailer for use with bicycles as defined in claim 5, wherein each ring further has a plurality of recesses connecting with two end faces thereof, with all recesses being formed in the inner radial surface of the ring with intervals. 7. The carrying trailer for use with bicycles as defined in claim 3, wherein each positioning module further has a retaining plate and each positioning block has an assembling hole beside the obstructing portion, with the retaining plate being pivotably mounted in the assembling hole. 8. The carrying trailer for use with bicycles as defined in claim 7, wherein each positioning module further has an elastic element with two ends abutting a surface of the retaining plate and the outer radial surface of the spine, with the elastic element being close to and biasing one end of the retaining plate out of the assembling hole to form the retaining portion of the positioning block. 9. The carrying trailer for use with bicycles as defined in claim 8, wherein a bottom surface and a top surface of each retaining plate form a pivot-connecting portion and a semispherical protrusion respectively, with the pivot-connecting portion being in the assembling hole and coupling to the positioning block for the retaining plate to be a seesaw balanced in the pivot-connecting portion, with the semispherical protrusion being adjacent to one end of the retaining plate and away from the obstructing portion of the positioning block. 10. The carrying trailer for use with bicycles as defined in claim 7, wherein one end of each retaining plate is securely attached to a periphery of the assembling hole of the positioning block, with a semispherical protrusion being formed on the retaining plate and out of the assembling hole. 11. The carrying trailer for use with bicycles as defined in claim 2, wherein the second hollow rod has a combining through-hole close to the second end thereof extending into the third hollow rod, and the third hollow rod has two combining through-holes adjacent to two ends thereof respectively, with the spine further having a pin inserted into the combining through-hole of the second hollow rod and one of the two combining through-holes of the third hollow rod at the same time. 12. The carrying trailer for use with bicycles as defined in claim 2, wherein the first hollow rod, the second hollow rod and the third hollow rod are all round rods, and each ring of the branch members has a circular axial hole. 13. The carrying trailer for use with bicycles as defined in claim 2, wherein the second hollow rod has two grooves formed in an outer radial surface thereof with an interval, with the grooves being parallel to an axis of the second hollow rod, with the third hollow rod having two protrusions formed on an inner radial surface thereof to engage with the two grooves respectively. 14. The carrying trailer for use with bicycles as defined in claim 3, wherein all the positioning blocks are arranged along an axis of the spine to be in a straight line and align with each other. 15. The carrying trailer for use with bicycles as defined in claim 1 further including a linking module pivotably coupling to the connecting portion of the spine, with the linking module being adapted to couple to the bicycle. 16. The carrying trailer for use with bicycles as defined in claim 15, wherein the linking module has a shaft with one end thereof pivotably coupling to the connecting portion of the spine, a connecting member and a plurality of adjusting sleeves, with the connecting member and the adjusting sleeves being mounted around the shaft. 17. The carrying trailer for use with bicycles as defined in claim 16, wherein the connecting member has a sleeve mounted around the shaft and a linking arm fixed to an outer surface of the sleeve. 18. The carrying trailer for use with bicycles as defined in claim 1, wherein the supporting arm is perpendicular to an axis of the ring.