WO1999042355A1

WO1999042355A1 - A locking means for front and rear frames of foldable bicycle

Info

Publication number: WO1999042355A1
Application number: PCT/CN1998/000021
Authority: WO
Inventors: Cong Xie
Original assignee: Cong Xie
Priority date: 1998-02-18
Filing date: 1998-02-18
Publication date: 1999-08-26
Also published as: AU6203998A

Abstract

A locking means for front and rear frames of foldable bicycle, comprises a front joint member fixed on the front frame, a rear joint member fixed on the rear frame, and a hinge axle connecting said front and rear joint members, wherein said rear joint member is a locking tube with one closed end, a locking pin is disposed in said locking tube, a biasing spring is disposed between said locking pin and the closed end of said tube, a locking hole in which said locking pin can be inserted is disposed in said front joint member. Said locking means also includes a sleeve fixed on the middle axle of the bicycle, a rotating shaft disposed in said sleeve and a pedal lever fixed on said rotating shaft. A slot is disposed in one end of said pedal lever, a screw is fixed on the locking pin through said slot. Rotation of the pedal lever about said rotating shaft will cause moving of said locking pin by means of said screw, so as to lock or unlock the front and rear frames by means of said front and rear joint members.

Description

Locking device for folding bicycle front and rear frames

TECHNICAL FIELD OF THE INVENTION

The invention relates to a folding bicycle, in particular to a pedal locking device for a front frame and a rear frame. Background technique

Folding bicycles need to be folded. The frames are generally composed of separable front and rear frames. The front and rear frames are usually connected by bolts or connection boxes. When locking or opening, they need to be connected or unlocked with tools. Therefore, It takes time and effort to load and unload, and is inconvenient to use. Summary of invention

An object of the present invention is to provide a locking device that utilizes the principle of a lever to move a locking pin with a lever to open a front and rear frame. A further object of the present invention is to provide a locking device for folding the front and rear frames of a bicycle, which is securely connected and easy to detach. The locking device for achieving the purpose of the present invention includes a front connection member connected to the front frame, a rear connection member connected to the rear frame, and a pivot shaft pivotally connecting the front and rear connection members. The rear connection member is one end Closed lock tube, install a lock pin in the tube, install a spring on the lock pin and the bottom end of the lock tube, open a bayonet on the front connector for the lock pin to be inserted, and lock A screw is installed on the pin to drive the movement. The locking device also includes a shaft sleeve fixed on the bicycle's middle shaft, a shaft installed in the shaft sleeve, and a pedal rod mounted on the shaft. The pedal rod is installed at the lower end of the pedal. A pedal is provided with a slot at the upper end of the pedal, and the screw is connected to the locking pin through the slot.

Replacement page (Article 26) A further solution of the invention is:

The front connecting piece is a trough-shaped frame, and the locking pipe is placed in the groove of the connecting piece;

The bottom end of the locking tube is connected with a pivot sleeve, and the pivot sleeve and the trough frame are hinged by a bolt;

The end of the locking pin matching the bayonet is a semi-circular inclined surface. The invention has the characteristics of high connection strength and convenient use, and can realize fast loading and unloading of a folding bicycle. Brief Introduction

The present invention is described in detail below with reference to the drawings. FIG. 1 is a partially cutaway view of the present invention;

FIG. 2 is a sectional view taken along line A-A in FIG. 1; FIG.

3 is a cross-sectional view taken along the line B-B in FIG. 2;

4 is a state diagram of the device shown in FIG. 2 when it is opened;

Fig. 5 is a state diagram of the device shown in Fig. 3 when it is opened. Description of the preferred embodiment

1-3, the locking device of the present invention includes: a front connecting member 2 connected to the front frame 1 of the bicycle; a rear connecting member 3 connected to the rear frame 7; and a pivot shaft pivotally connecting the front and rear connecting members. 12. The locking device further includes a shaft sleeve 9 fixed on a bicycle central shaft (or middle joint) 8, a shaft 14 installed in the shaft sleeve 9, and a pedal rod 6 installed on the shaft. In the embodiment of the present invention, the front connecting member 2 is a trough-shaped frame, the pivot shaft 12 is a bolt, and the rear connecting member 3 is a locking tube closed at one end. A locking pin 4 is installed in the tube. A spring 10 is installed at the bottom end of the fastening pin 4 and the locking pipe 3, and the locking pipe 3 is placed in the groove of the front connecting member 2. A bayonet 13 through which the locking pin 4 can be inserted is opened on the front connecting member 2, and a screw 5 is installed on the locking pin 4 to move the locking pin 4. On the pedal

2

Replacement page (Article 26) A pedal 15 is installed at the lower end, and a slot 16 is provided at the upper end of the pedal, and the screw 5 is connected to the locking pin 4 through the slot 16. A positioning ring 19 is installed on the outer end of the rotating shaft 14. The bayonet 13 on the front connecting piece 2 is provided on the side opposite to the pivot 12 so that the locking pin 4 can be inserted into the bayonet 13 under the action of the spring 10. At the same time, the front connecting piece 2 is also opened. A slot hole 17 which is convenient for the screw 5 to drive the locking pin 4 to move, and a slot hole 18 corresponding to the slot hole 17 is also opened in the locking tube 3. In order to increase the connection strength, the bottom end of the locking tube 3 is connected with a pivot sleeve 11, and the pivot sleeve 11 and the trough frame 2 are hinged by bolts 12. In order to facilitate the locking pin 4 to slide into the bayonet 13 easily when folding the bicycle, the end of the locking pin 4 matching the bayonet 13 is a semi-circular inclined surface 17, that is, the end of the locking pin 4 shown in FIG. 2 The portion is semicircular and the end shown in FIG. 3 is wedge-shaped. In a folding bicycle using the locking device of the present invention, when the rear frame pipe 7 is welded to the center shaft 8, its end portion is preferably extended from the center axis forward (from the rear wheel to the front wheel), so that Install the locking device. When the frame is composed of an upper tube, a lower tube, and a riser, the front frame tube 1 is a lower tube of the frame, and the tube may be a single tube or a double tube. When the frame is composed of a down tube (or inclined tube) and a riser, the front frame tube 1 is a down tube or an inclined tube. Referring to FIG. 4, in use, stepping on the pedal 15 of the pedal lever 6 with the foot, the pedal lever 6 rotates around the rotation shaft 14, and the screw 5 in the groove 16 at the upper end of the pedal lever 6 moves to the right as the pedal lever 6 rotates, thereby Make the locking pin 4 exit the bayonet 13 against the elastic force of the spring 10. At this time, if there is an upper tube, the locking device of the upper tube is also opened (the locking device is not shown in the figure, but it is required to be in the open state) At this time, the locking device of the present invention can also be opened, and the upper tube is rotated around the vicinity of the riser. The device may be "for a folding bicycle" applied by the applicant on the filing date.

3

Replacement page (Article 26) The device disclosed by the "Frame tube turning lock device", so that the front and rear frames can be moved toward each other, that is, the front and rear frames are folded in half, as shown in Figure 5, the front and rear frames are rotated 180 ° about the pivot 12 to realize the front and rear vehicles. When the frame is to be deployed to prepare for riding, the end plate of the front connector 1 with the bayonet 13 is pressed against the locking pin 4 so as to be retracted into the locking tube 3 against the elastic force of the spring 10, The locking pipe 3 is placed in the groove of the front connecting member 2. At this time, since the bayonet 13 faces the locking pin 4, the pressure acting on the locking pin 4 is eliminated, and the locking pin 4 moves under the action of the spring 10. Move outside and snap into the bayonet 13 again, so that the front and rear frames are locked in the deployed position. The present invention is not limited to the above embodiment, and it is obvious that various changes can be made within the scope of the concept of the present invention.

A

Replacement page (Article 26)

Claims

Rights request

1. A locking device for folding a front and rear frame of a bicycle, comprising a front connection member connected to the front frame, a rear connection member connected to the rear frame, and a pivot shaft pivotally connecting the front and rear connection members, It is characterized in that the rear connector is a locking tube with one end closed, a locking pin is installed in the tube, a spring is installed on the locking pin and the bottom end of the locking tube, and the front connector is opened. There is a bayonet through which the locking pin can be inserted. A screw that moves the locking pin is installed on the locking pin. The locking device further includes a shaft sleeve fixed on a bicycle central shaft, and a A rotating shaft in the sleeve and a pedal rod mounted on the rotating shaft, a pedal is installed at the lower end of the pedal rod, a slot is provided at the upper end of the pedal rod, and the screw passes through the slot and the lock Tight pin connection.

2. The locking device for a folding front and rear frame of a bicycle according to claim 1, wherein said front connecting member is a trough-shaped frame, and said locking pipe is placed in a groove of said connecting member.

3. The locking device for a folding bicycle front and rear frame according to claim 2, characterized in that the bottom end of said locking tube is connected to a pivot sleeve, and said pivot sleeve passes through said trough frame One bolt is articulated.

4. The locking device for folding the front and rear frames of a bicycle according to claim 1, 2 or 3, characterized in that an end portion of said locking pin which cooperates with said bayonet is a semi-circular inclined surface.

5 Replacement page (Article 26 糸)