JPH0215755Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bicycle with an automatic folding device.

Some bicycles have a folding structure for storage and the like. Traditional folding bicycles have folding mechanisms that require tools and force, and are quite time-consuming.

The present invention provides a bicycle that automatically folds and restores to its normal configuration without requiring any tools or force, and which anyone can fold and assemble in an extremely short time.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a front wheel and 2 is a rear wheel. In the present invention, one main frame 5 between the front wheel support part 3 and the crank pedal bearing part 4 is divided in the front and rear direction near the crank pedal bearing part 4, and this is connected to the hinge 22 as shown in FIG. Therefore, it is pivotally connected so that it can be turned and folded laterally. 6 is the hinge 22
The central part of the vehicle body is folded in half so that the front wheels 1 and rear wheels 2 overlap as shown in FIG. 7 shows the support frame of the saddle post.

Furthermore, the present invention is provided with a device that automatically performs the folding and restoring operations. The mechanism will be explained with reference to FIG. 3. 5a is a frame on the side of the separated crank pedal bearing section 4, and 5b is a frame on the front wheel support section 3 side. A double-acting air cylinder 8 is installed inside one frame 5a. 9
is the piston rod. A hook 10 which can be opened and closed by a pin 11 and a double torsion spring 12, and a pivot arm 13 whose one end is pivotally connected by a pin 14 are attached to the divided end of the frame 5a. A link 15 is pivotally attached to the tip of the piston rod 9 by a pin 16, and the pivot arm 1 is attached to the center of the link 15.
3 is pivotally connected by a pin 17. Furthermore, a bending link 18, which is pivotally connected to the hook 10, is pivotally connected to the tip of the link 15 by a pin 20. Reference numeral 19 is a stopper that maintains the extended state of the bending/extending link 18. Additionally, one end of the operating lever 21 bent into a dogleg shape is pivotally connected to a pin 17 that pivotally connects the pivot arm 13 and the link 15.

Next, the divided end of the other frame 5b has a lock pin 23 to which the hook 10 is engaged and disengaged;
Further, the other end of the operating lever 21 is pivotally connected by a pin 24.

Further, as shown in FIGS. 1 and 2, an air tank 25 is attached to the support frame 7 of the saddle post, and the air tank 25 is connected to the air cylinder 8 through a piping tube 27. 26 indicates an air control valve.

In the above embodiment, the air cylinder 8 is used as a forward/backward actuating device, but a mechanism that converts the rotation of the reversible electric motor into forward/backward movement of the actuating shaft via a deceleration device may be adopted; in that case, The air tank 25 is replaced with a battery.

Since the present invention has the above-mentioned structure, in the normal state shown in FIG. 1, the piston rod 9 moves backward as shown in FIG.
As a result, the other frame 5b is mated with one frame 5a, and the hook 10 is engaged with the lock pin 23, so that the two frames 5a and 5b are connected to form one main frame 5.

When folding, the air valve 26 is operated to move the piston rod 9 forward. As a result, the link 15 rotates clockwise in the drawing around the pin 17, and the resulting rotation of the pin 20 pulls the bending link 18, and the hook 10 is removed from the lock pin 23 against the double torsion spring 12. . Thereafter, due to further forward movement of piston rod 9, pin 17 is moved to pin 1.
4, and the operating lever 21 rotates around the hinge 22 of the pin 24. In this way, the other frame 5b is laterally folded and pivoted about the hinge 22. To restore the frame from the folded state, the link 15 is rotated counterclockwise in the drawing by moving the piston rod 9 backward, and the frame 5b is rotated about the hinge 22 by retracting the operating lever 21. Plus 10 hooks
When it comes into contact with the lock pin 23, the hook 10 is pushed away, and then the force of the double torsion spring connects the lock pin and the hook, completing the locking operation.

In this way, the present invention is a foldable bicycle that can be folded and restored automatically using a simple power source and lock mechanism, eliminating the need for tools and force as in the past, allowing anyone to fold and restore easily and quickly. It has the advantage of not getting your hands dirty.

[Brief explanation of the drawing]

Fig. 1 is a side view of the bicycle according to the present invention, Fig. 2 is a side view of the bicycle in the folded state, Fig. 3 is a cross-sectional view of the automatic folding device, Fig. 4 is a cross-sectional view of the bicycle in the folding state, and Fig. 5 is the lock. It is a sectional view of a release state. 1...Front wheel, 2...Rear wheel, 3...Front wheel support part,
4... Crank pedal bearing part, 5... Main frame, 5a... One frame, 5b... Other frame, 6... Folding part, 8... Air cylinder, 9... Piston rod, 10... Hook, 1
3... Swivel arm, 15... Link, 18... Bending link, 21... Operating lever, 22... Hinge, 23... Lock pin, 24... Pin.

Claims (1)

[Scope of utility model registration request] In a two-wheeled bicycle, one main frame between the front wheel support part and the crank pedal bearing part is divided in the front and back direction near the crank pedal bearing part, and the frame can be turned and folded laterally by a hinge. The mechanism is pivotally connected, and a forward/backward actuator that moves reciprocally in the axial direction by an air cylinder or a reversible electric motor is built into the frame on the side of the crank pedal bearing. An operating lever that rotates is provided via a link mechanism, a lock pin is provided at the divided end of the frame on the front wheel support side to engage and disengage the hook, and the tip of the operating lever is pivotally connected. A bicycle with an automatic folding device.