초록 ▼

A vehicle body is provided with a rear wheel at a rear portion, and a front wheel coupled to a handle post. A swing-enabling shaft is rotatably provided on the upper portion of the handle post. A handlebars unit is attached to the swing-enabling shaft such that it can swing forward and backward rela

A vehicle body is provided with a rear wheel at a rear portion, and a front wheel coupled to a handle post. A swing-enabling shaft is rotatably provided on the upper portion of the handle post. A handlebars unit is attached to the swing-enabling shaft such that it can swing forward and backward relative to the vehicle body. When the handlebars unit is swung, a driving mechanism is driven. The driving mechanism rotates the front wheel such that the vehicle body advances, regardless of whether the handlebars unit is swung forward or backward.

대표청구항 ▼

What is claimed is: 1. A hand-driven vehicle comprising: a vehicle body; a rear wheel rotatably provided at a rear portion of the vehicle body; a rotatable handle post at a front portion of the vehicle body; a front wheel rotatably provided at a lower portion of the handle post; a swing-enabling sh

What is claimed is: 1. A hand-driven vehicle comprising: a vehicle body; a rear wheel rotatably provided at a rear portion of the vehicle body; a rotatable handle post at a front portion of the vehicle body; a front wheel rotatably provided at a lower portion of the handle post; a swing-enabling shaft rotatably provided on an upper portion of the handle post; a handlebars unit attached to the swing-enabling shaft such that the handlebars unit can swing forward and backward relative to the vehicle body while rotating the swing-enabling shaft forward and backward; a driving mechanism which outputs a rotational force that rotates the front wheel only in a direction in which the vehicle body advances, in accordance with the forward and backward rotation of the swing-enabling shaft; a power transmission mechanism which transmits, to the front wheel, the rotational force output from the driving mechanism; and a power interrupting mechanism which is provided between the power transmission mechanism and the driving mechanism, and which is operable to interrupt transmission of power from one of the power transmission mechanism and the driving mechanism to the other; wherein the driving mechanism includes: a pair of first power transmission wheels arranged on the swing-enabling shaft via respective one-way clutches such that one of the pair of first power transmission wheels rotates in synchrony with a forward rotary movement of the swing-enabling shaft, and the other first power transmission wheel rotates in synchrony with a backward rotary movement of the swing-enabling shaft; a pair of second power transmission wheels rotatably provided at positions corresponding to the pair of first power transmission wheels; a pair of power transmission members each stretched between one of the pair of first power transmission wheels and a corresponding one of the pair of second power transmission wheels, the pair of power transmission members each transmitting, to a corresponding one of the pair of second power transmission wheels, a rotary movement of a corresponding one of the pair of first power transmission wheels, which rotate in different directions corresponding to the forward rotary movement and the backward rotary movement of the swing-enabling shaft; and a gear train which converts rotary movements in different directions of the pair of second power transmission wheels into a rotary movement in a single direction; wherein the power transmission mechanism includes: a first driving wheel rotated by an output of the driving mechanism via the power interrupting mechanism; a second driving wheel rotatable together with the front wheel; and a second power transmission member which is stretched between the first driving wheel and the second driving wheel, and which transmits the output of the driving mechanism to the front wheel; and wherein the power interrupting mechanism comprises: a clutch which is interposed between the power transmission mechanism and one of the second power transmission wheels, and which includes a fixed disc which rotates together with the one of the second power transmission wheels and a movable disc that is formed integrally with the first driving wheel and elastically urged toward the fixed disc; and a clutch lever which interrupts power transmission via the clutch by displacing the movable disc away from the fixed disc when the clutch lever is operated. 2. The hand-driven vehicle according to claim 1, wherein the vehicle body includes a seat section which permits a user to sit thereon, and wherein a forward/backward directional position and a vertical position of the seat section is adjustable relative to the vehicle body. 3. The hand-driven vehicle according to claim 2, wherein a distance between the handlebars unit and the swing-enabling shaft is adjustable. 4. The hand-driven vehicle according to claim 1, wherein the vehicle body includes a seat section which permits a user to sit thereon and which includes a pair of armrests rotatably provided at opposite sides thereof. 5. hand-driven vehicle comprising: a vehicle body; a rear wheel rotatably provided at a rear portion of the vehicle body; a rotatable handle post at a front portion of the vehicle body; a front wheel rotatably provided at a lower portion of the handle post; a swing-enabling shaft rotatably provided on an upper portion of the handle post; a handlebars unit attached to the swing-enabling shaft such that the handlebars unit can swing forward and backward relative to the vehicle body while rotating the swing-enabling shaft forward and backward; a driving mechanism which outputs a rotational force that rotates the front wheel only in a direction in which the vehicle body advances, in accordance with the forward and backward rotation of the swing-enabling shaft; a power transmission mechanism which transmits, to the front wheel, the rotational force output from the driving mechanism; and a power interrupting mechanism which is provided between the power transmission mechanism and the driving mechanism, and which is operable to interrupt transmission of power from one of the power transmission mechanism and the driving mechanism to the other; wherein the vehicle body includes a seat section which permits a user to sit thereon, and which includes a back, a holding member attached to a rear surface of the back for elastically holding an upper portion of an object, and a receiver below the holding member to receive a lower end of the object. 6. The hand-driven vehicle according to claim 1, wherein the vehicle body includes a seat section which permits a user to sit thereon, and which includes a back, a grip member that is attached to a rear surface the back to be gripped to push and pull the vehicle body. 7. A hand-driven vehicle comprising: a vehicle body; a plurality of rear wheels rotatably provided at a rear portion of the vehicle body; a rotatable handle post at a front portion of the vehicle body; a front wheel rotatably provided at a lower portion of the handle post; a swing-enabling shaft rotatably provided on an upper portion of the handle post; a handlebars unit attached to the swing-enabling shaft such that the handlebars unit can swing forward and backward relative to the vehicle body while rotating the swing-enabling shaft forward and backward; a driving mechanism which outputs a rotational force that rotates the front wheel only in a direction in which the vehicle body advances, in accordance with the forward and backward rotation of the swing-enabling shaft; a power transmission mechanism which transmits, to the front wheel, the rotational force output from the driving mechanism; a power interrupting mechanism which is provided between the power transmission mechanism and the driving mechanism, and which is operable to interrupt transmission of power from one of the power transmission mechanism and the driving mechanism to the other; and handrims which are attached to respective outside portions of the rear wheels, and which are used to rotate the rear wheels manually. 8. A hand-driven comprising: a vehicle body; a rear wheel rotatably provided at a rear portion of the vehicle body; a rotatable handle post at a front portion of the vehicle body; a front wheel rotatably provided at a lower portion of the handle post; a swing-enabling shaft rotatably provided on an upper portion of the handle post; a handlebars unit attached to the swing-enabling shaft such that the handlebars unit can swing forward and backward relative to the vehicle body while rotating the swing-enabling shaft forward and backward; and a driving mechanism which outputs a rotational force that rotates the front wheel only in a direction in which the vehicle body advances, in accordance with the forward and backward rotation of the swing-enabling shaft; a power transmission mechanism which transmits, to the front wheel, the rotational force output from the driving mechanism; and a steering angle limiting mechanism which limits a rotational angle of the handle post when the handle post is rotated to change a direction of the front wheel using the handlebars unit; wherein the steering angle limiting mechanism comprises: an attachment member including a support portion attached to the handle post; and a steering angle limiting member including a pair of side portions and a middle portion rotatably supported by the support portion, wherein the pair of side portions are rotatable between a standing position in which the side portions hold the vehicle body therebetween, and a lying position in which the side portions do not oppose the vehicle body. 9. The hand-driven vehicle according to claim 8, further comprising an additional rear wheel and handrims which are attached to respective outside portions of the rear wheels, and which are used to rotate the rear wheels manually. 10. A hand-driven vehicle comprising: a vehicle body; a rear wheel rotatably provided at a rear portion of the vehicle body; a rotatable handle post at a front portion of the vehicle body; a front wheel rotatably provided at a lower portion of the handle post; a swing-enabling shaft rotatably provided on an upper portion of the handle post; a handlebars unit attached to the swing-enabling shaft such that the handlebars unit can swing forward and backward relative to the vehicle body while rotating the swing-enabling shaft forward and backward; a driving mechanism which outputs a rotational force that rotates the front wheel only in a direction in which the vehicle body advances, in accordance with the forward and backward rotation of the swing-enabling shaft; a power transmission mechanism which transmits, to the front wheel, the rotational force output from the driving mechanism; and swing angle limiting means for limiting a swing angle of the handlebars unit in a forward/backward direction; wherein the swing angle limiting means comprises: engagement shafts which swing in synchrony with a swing movement of the handlebars unit; and a swing limiting member provided on the vehicle body, wherein the swing limiting member is brought into contact with the engagement shafts in a predetermined swing position when the handlebars unit is swung in the forward/backward direction.