WO1999042356A1

WO1999042356A1 - A pivoting and locking means for the frame tubes of a foldable bicycle

Info

Publication number: WO1999042356A1
Application number: PCT/CN1998/000022
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: AU6087798A

Abstract

A pivoting and locking means for the frame tubes of a foldable bicycle comprises a front frame tube and a rear frame tube, wherein a front locking sleeve and a rear locking sleeve are joined on said front and rear frame tubes respectively by means of screws, a front connecting arm and a rear connecting arm are fixed on said front and rear locking sleeves respectively and are pivotally joined together by a hinged shaft, a locking plate is fixed on the rear end of said front frame tube and a mounting plate is fixed on the front end of said rear locking sleeve, an elongated hole is provided in said locking plate and a T-shaped locking member is fixed on said mounting plate, which extends along the axial direction of said rear frame tube and can be inserted into said hole. When the front frame tube and the rear frame tube are pivotally joined around the hinged shaft, they can be locked or released by the rotation of said T-shaped locking member in said hole, which is caused by the rotation of the front and rear connecting arms around the axis of the frame tube.

Description

Turning locking device for frame tube of folding bicycle

TECHNICAL FIELD OF THE INVENTION

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

The folding of the existing folding bicycle's frame generally uses a fixed hinge mechanism, such as the hinge mechanism of the Brownden folding bicycle jointly produced by Taiwan and the United Kingdom. This mechanism takes into account that the front and rear frames of the bicycle must be parallel when folded, so The centerline of the articulation device must be at the outermost edge of the frame, so that the articulation device forms a prominent protrusion, which will affect the appearance of the vehicle body. It may catch the skirt or trouser corner when riding, and this This mechanism cannot be locked by itself. Summary of invention

An object of the present invention is to provide a folding and locking mechanism for folding a bicycle frame. A turning and locking device for a frame tube of a folding bicycle for achieving the purpose of the present invention includes a front tube and a rear tube. The front tube and the rear tube can be relatively folded, and the front tube and the rear tube are respectively connected to a front tube. The locking sleeve is screwed with a rear tube locking sleeve, and a front sleeve connecting arm and a rear sleeve connecting arm are respectively fixed on the front tube and the rear tube. The front sleeve connecting arm and the rear sleeve connecting arm are connected to each other through a hinge shaft A locking piece is fixed at the rear end of the front tube, a mounting piece is fixed in the rear tube locking sleeve close to the front end of the rear tube, a long hole is opened in the locking piece, and a mounting piece is fixed along the axial direction of the rear tube. The extended τ-shaped locking head that can be inserted into a long hole. The length and width of the locking head are smaller than the length and width of the long hole, but the length of the locking head is greater than the width of the long hole. In the present invention, a limit pin is further provided in the rear pipe, and a limit stop is fixed on the mounting piece. The limit stop is preferably a screw installed on the mounting piece. The invention has the characteristics of beautiful appearance, small structure size, high connection strength, and convenient use. Replacement page (Article 26) Brief Introduction

The invention is described in detail below with reference to the drawings. FIG. 1 is a vertical sectional view of a locking device of the present invention in a locked state.

FIG. 1 is a cross-sectional view taken along the line A-A in FIG. 1.

Fig. 3 is a horizontal sectional view of the locking device of the present invention when it can be opened.

Fig. 4 is a vertical sectional view of the locking device of the present invention in an opened state.

Fig. 5 is a schematic diagram of the present invention applied to a vehicle frame. Description of the preferred embodiment

Referring to FIGS. 1-4, a frame tube turning and locking device 20 for a folding bicycle according to the present invention includes a front tube 1 and a rear tube 2. The front tube 1 and the rear tube 2 can be relatively folded. The front tube 1 And rear tube 2 are threadedly connected to a front tube locking sleeve 3 and a rear tube locking sleeve 4 respectively, and a front sleeve connecting arm 5 and a rear sleeve connecting arm 6 are respectively fixed to the front tube 1 and the rear tube 1, The front sleeve link arm 5 and the rear sleeve link arm 6 are connected to each other through a hinged shaft Ί. A locking piece 8 is fixed at the rear end of the front tube 1, and the rear tube lock sleeve 4 is fixed close to the front end of the rear tube 1. The mounting piece 9 has a long hole 10 in the locking piece 8, and a T-shaped locking head 11 that can be inserted into the long hole 10 and extends in the axial direction of the rear tube is fixed on the fixing piece 9. The locking head 1 1 The length and width of the long hole 10 are smaller than the length and width of the long hole 10, but the length of the locking head 11 is greater than the width of the long hole 10. In order to perform accurate positioning, the present invention sets a limit pin 12 in the rear tube 2 and fixes a limit stop 13 on the mounting piece 9. The limit stop 13 is preferably installed on the installation piece 9 On the screw. Fig. 5 shows a case where the frame tube turning lock device 20 of the present invention is applied to a frame. In FIG. 5, the front tube 1 and the rear tube 2 are used as the upper tube of the frame, the front tube 1 is connected with the frame head tube 21, the rear tube 2 is connected with the frame saddle riser 22, and the frame lower tube 2 3 The folding hinge connection mechanism 25 with the rear wheel frame 24 may be in any form. Of course, the frame tube turning and locking device 20 of the present invention may also be used. The method of using the present invention is as shown in Figs. 1 and 2. When folding a bicycle, a handle 26 composed of a front cover link 5 and a rear cover link 6 is rotated 90 from a vertically downward position to a horizontal direction. , The front tube locking sleeve 3 and the rear tube locking sleeve 4 rotate around the front tube 1 and the rear tube 2 respectively,

Replacement page (Article 26) The rear tube locking sleeve 4 drives the mounting piece 9 to rotate, thereby rotating the T-shaped locking head 11 to the position shown in FIG. 2. At this time, the T-shaped locking head 11 can be withdrawn from the long hole 10 and the folding hinge structure 25 Already open or open at the same time. With the hinge shaft 7 as the center and rotating 180 °, the front tube 1 and the rear tube 2 of the frame can be folded. When riding, the handlebar 26 is in the horizontal position, butt joint the front tube 1 and the rear tube 2, the T-shaped locking head 11 is inserted into the long hole 10, and the handle 26 is turned down to the vertical position. 10 is in the vertical state, and the front tube 1 and the rear tube 2 are locked. The present invention has been described in detail through a specific embodiment, but the present invention is not limited thereto, and various changes can be made within the scope of the concept of the present invention, which is obvious to those skilled in the art, such as a lock The position and movement relationship of the clamping piece 8 and the mounting piece 9 can be interchanged. The locking sleeve can be arranged in the front tube or the rear tube, but a long hole for turning the handle must be opened in the front tube or the rear tube.

Replacement page (Article 26)

Claims

Rights request

1. A frame tube turning and locking device for a folding bicycle, comprising a front tube (1) and a rear tube (2), the front tube (1) and the rear tube (1) can be relatively folded, and is characterized in that: The front tube (1) and the rear tube (2) are threadedly connected to a front tube locking sleeve (3) and a rear tube locking sleeve (4), respectively, and the front tube (1) and the rear tube (2) One front sleeve arm is fixed on each

(5) and a rear sleeve link arm (6), the front sleeve link arm (5) and the rear sleeve link arm (6) are connected to each other through a hinge shaft (7), and are fixed at the rear end of the front tube (1) A locking piece (8), a mounting piece (9) is fixed in the rear tube locking sleeve (4) close to the front end of the rear tube (2), and a long hole is formed in the locking piece (8) ( 10), a T-shaped locking head (11) extending along the axis of the rear tube (2) and inserted into the long hole (10) is fixed on the mounting piece (9), and the locking head (11 ) Is smaller than the length and width of the long hole (10), but the length of the locking head (11) is greater than the width of the long hole (10).

2. The frame tube turning and locking device according to claim 1, characterized in that a limit pin (12) is provided in the rear tube (2), and a fixing pin (12) is fixed on the mounting piece (9). Limit stop (13).

3. The turning lock device for a frame pipe according to claim 2, wherein the limit stop (13) is a screw mounted on a mounting piece.

Replacement page (Article 26 糸)