In a steerable traveling trunk, a driving part is provided for converting a horizontal axis rotation of the handle into a vertical axis rotation at both ends of the handle and transferring the rotations as a user rotates the handle. A driving force transfer part is connected to the driving part and
In a steerable traveling trunk, a driving part is provided for converting a horizontal axis rotation of the handle into a vertical axis rotation at both ends of the handle and transferring the rotations as a user rotates the handle. A driving force transfer part is connected to the driving part and transfers rotational force of the driving part to a lower side of the traveling trunk body. An output part is connected to a lower side of the driving force transfer part and transfers rotational force depending on the rotation of the handle, to the wheels, thus adjusting steering angles of the wheels, and allowing the traveling directions of the trunk to be easily changed.
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1. A steerable traveling trunk which includes a retractable handle at an upper side of a traveling trunk body and a pair of wheels disposed at a lower side of the same, comprising: a driving part for converting a horizontal axis rotation of the handle into a vertical axis rotation at both ends of th
1. A steerable traveling trunk which includes a retractable handle at an upper side of a traveling trunk body and a pair of wheels disposed at a lower side of the same, comprising: a driving part for converting a horizontal axis rotation of the handle into a vertical axis rotation at both ends of the handle and transferring the rotations as a user rotates the handle;a driving force transfer part which is connected to an upper side of the driving part and transfers the rotational force of the driving part to a lower side of the traveling trunk body and is formed in a retractable structure in the interior of a handle pole part; andan output part which is connected to a lower side of the driving force transfer part and transfers the rotational force transferred via the driving force transfer part depending on the rotation of the handle of the driving part to the wheels in an inclined direction, thus adjusting the steering angles of the wheels in leftward or rightward directions,wherein said driving force transfer part comprises a pair of first straight members of which upper sides are engaged to one of a pair of second bevel gear center shafts of the driving part, respectively, and a pair of second straight members into which each first straight member is inserted, and both the first and second straight members being formed of polygonal cross sections, and the vertical axis rotation of the first straight member is transferred to the vertical axis rotation of the second straight member. 2. The traveling trunk of claim 1, wherein said driving part includes a horizontal bar having an outer surface into which the handle is inserted via a sleeve, and a first bevel gear rotary shaft is formed at both ends of the horizontal bar for inserting and engaging a first bevel gear thereto, respectively, and the first bevel gear is drivingly engaged with a second bevel gear, and the both ends of the handle are engaged to the first bevel gear, so the horizontal axis rotation of the handle is converted to the vertical axis rotation via the first bevel gear and the second bevel gear. 3. The traveling trunk of claim 2, wherein said first bevel gear and said second bevel gear are accommodated in the upper portion of each handle pole part, and driving protrusions protruded from the both ends of the handle are inserted into the back side of the first bevel gear, and the driving protrusions pass through an arc shaped cut-away part formed at a side surface of the handle pole part and are engaged to the back surface of the first bevel gear. 4. The traveling trunk of claim 3, wherein said arc shaped cut-away parts are symmetrical with respect to a first bevel gear rotary shaft and are arranged concentrically, and the first bevel gear rotates on the first bevel gear rotary shaft-when the handle rotates. 5. The traveling trunk of claim 2, wherein said first bevel gear rotary shaft of the horizontal bar is inserted into a through hole of the first bevel gear, and a second bevel gear center shaft rotatably passes through the end portion of the first bevel gear rotary shaft from the upper side to the lower side, and the first bevel gear rotating on the first bevel gear rotary shaft rotates the second bevel gear center shaft via the second bevel gear. 6. The traveling trunk of claim 5, wherein the diameter of the first bevel gear is larger than the diameter of the second bevel gear, so the rotation angle of the second bevel gear center shaft is more largely amplified than the rotation angle of the handle, and the second bevel gear is positioned at an upper side of the first bevel gear at one end portion of the handle, and the second bevel gear is positioned at a lower side of the first bevel gear at the other end portion of the handle, so the second bevel gear center shafts of both sides rotate in the same directions depending on the rotation of the handle. 7. The traveling trunk of claim 1, wherein said output part comprises: an upper universal joint of which input side is connected to a lower side of each second straight member of the driving force transfer part;a pair of inclined bars of which upper sides are connected to the output side of the upper universal joint, respectively; anda pair of lower universal joints of which input sides are connected to the lower sides of the inclined bars, respectively,a third bevel gear being connected to the output sides of the lower universal joints, respectively, said third bevel gears being drivingly engaged with a fourth bevel gears which rotate the wheels, thus transferring the rotational force of the driving force transfer part to the wheels, so the wheels change their steering angles in the same direction, respectively.
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