JPH0735283U - Folding bicycle - Google Patents

Abstract

(57) [Summary] [Purpose] A foldable two-wheeled bicycle structure that is simple to carry and has a compact folding dimension. [Structure] A triangular structure consisting of a front member with front wheels, a rear member with handle and saddle, and a connecting member with pedal, transmission section and rear wheel. [Effect] It is easy to fold with 4 nodes and is practical.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foldable two-wheeled bicycle.

[0002]

[Conventional technology section] The conventional folding type has a complicated structure, is troublesome to fold, the folding size is large and heavy, the energy loss is large because the parts are slid, and the parts removal method is inconvenient to attach and detach, and is practical as a bicycle. I was wondering if there was any question.
When a wire is used for steering, the conventional arm type has disadvantages such as a change in pulling moment and a change in the direction of pulling in the ear.

[0004]

[Problems to be solved by the invention] The problems described in the previous section [Prior Art] are further improved, and a folding structure that is easy to carry and does not lose its function as a bicycle is provided. [0005]

[Measures for solving the problem] The main material has a simple triangular structure, taking into account the positions of the front wheel, rear wheel, saddle, handlebar, and pedal. The folding of the main material is done by eliminating the sliding part and rotating all the nodes. Lightweight folding bicycle The size of the front and rear wheels is made smaller for compactness, and the drive chain is 2 to obtain practical speed.
It is a step. Steering is performed by pulling wires for steering the front wheels along the outer circumferences of the disks of the rotating shafts of the handle and the front wheels.

[0007]

[Action]

 In the folding of the present invention, when the fastening member (6) is loosened and the connecting member (3) is bent at the node (A), the front member (1) and the rear member (2) come close to each other and the main member is folded, and the handle The holding material (4) is housed inside the rear material (2), and the saddle holding material (5) is rotated around the node (C) to be folded.

In the front wheel steering, when the handle is turned, the disk of the handle rotating shaft rotates with it, and the wire stretched around the outer circumference is pulled. Steer.

[0009]

[Example] A front member (1), a rear member (2), and a connecting member (3) are connected to nodes (B, C,
Join at D). The main material is made of 3 / 4B pipe. Material is aluminum,
Use titanium etc. to reduce the weight. A front wheel rotating shaft is provided at the front end of the front member (1), and the front wheels are arranged therein.

The connecting member (3) is connected to the rear wheel by a chain with a pedal and two gears. Also, the structure is such that it bends upward at the node (A).

The handle holding material (4) is made of a pipe of about 1/2 B, and a handle rotating shaft is provided at the upper end. When folded, it is stored inside the rear member (2).

The saddle holding member (5) is attached with two plates sandwiching the node (C), and the rear member (2) is sandwiched between the saddle holding pipe (6) and the handle holding member (4). ) Is fixed. By opening the tightening portion (6), the handle member, the saddle member and the node (C) are released from the bundle and the members are folded.

The steering is operated by connecting the disk of the front wheel rotating shaft and the disk of the handle rotating shaft with a flexible wire and interlocking them.

A groove is formed on the outer circumference of the disk so that the wire does not come off, and the wire is passed along the groove.

[0016]

[Effect of device]

 The folding dimensions are compact and it does not take much time to fold. (Good portability and operability)

The structure is simple and lightweight, and it has practicality as a bicycle. (Has functionality)

In the steering section, since the wire moves on the outer peripheral tangent line of the rotating shaft disk, an unnatural force is applied to the wire and the moment is always constant.

The disc type can obtain a larger steering angle than the arm type.

[Brief description of drawings]

FIG. 1 shows a side view before folding.

FIG. 2 shows a side view after folding.

FIG. 3 is a conceptual plan view of a disc type steering unit in comparison with an arm type.

[Explanation of symbols]

 1 Front Material 2 Rear Material 3 Connecting Material 4 Handle Holding Material 5 Saddle Holding Material 6 Tightening Parts A to D Nodes

Claims (2)

[Scope of utility model registration request] 1. In FIG. 1, a front member (1), a rear member (2) and a connecting member (3) have a triangular structure composed of main members,
A handle holding material (4) and a saddle holding material (5) are arranged on this. When the tightening portion (6) is opened, it is bent at each of the nodes (A to D), the handle holding material (4) is stored inside the rear material (2), and the saddle holding material (5) is placed at the node (C). A structure that rotates around an axis and folds as shown in Fig. 2. 2. In FIG. 3, the front wheels are steered by providing a disk on each of the rotating shafts of the handle and the front wheels, and wire is steered along the outer periphery of the disks.