Totally-closed chain cover of child bicycle and fixing structure of totally-closed chain cover

Abstract

A totally-closed chain cover and fixing structure of a child bicycle comprises a totally-closed chain cover body composed of a first assembly and a second assembly, a frame type base combined with a right rear lower fork penetrating through a bicycle frame in a conformal surrounding mode and used for supporting the totally-closed chain cover body, and the frame type base is welded and fixed to the right rear lower fork of the bicycle frame. Or a five-way pipe sleeving body is arranged at the front section part of the frame and is fixed by sleeving a five-way pipe connected to the frame; by means of the structure, the totally-closed chain cover which can be installed on the child bicycle and completely shields the chain, namely the large fluted disc and the small fluted disc is provided, and the international new standard conforming to safety protection is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bicycle assembly field, especially, a kind of children's bicycle full-closed chain cover and its fixed structure. BACKGROUND

[0002] Now, as shown in Figure Figure 7 The chain cover 5 on the existing children's bicycle is usually only half-shielded design to shield part of chain and sprocket, but according to actual experience, the design of part of chain and sprocket shielding may be involved in trousers or clothes hem in driving, and danger may occur. On the other hand, children are lively and active, full of curiosity about things, and often naughty and mischievous behavior that cannot be expected, and the accidental situation that children insert fingers or foreign matter into chain or sprocket has also occurred. Therefore, the new international standard has included full-closed chain cover for children's bicycle in safety specification inspection items.

[0003] However, the existing chain cover is only a simple half-shielded structure, so it can be screwed to the frame with several screws. If full-closed chain cover is used, how to fix it to the frame without being blocked by the right rear lower fork and other parts of the frame is a new problem. INVENTION CONTENTS

[0004] The utility model aims to provide a full-closed chain cover and its fixed structure suitable for children's bicycle to reduce the possibility of accidents.

[0005] The full-closed chain cover and its fixed structure of children's bicycle of the utility model comprises a full-closed chain cover composed of a first combined part and a second combined part, and the first combined part and the second combined part of the full-closed chain cover are adaptively surrounded and combined with a frame type base strung at the right rear lower fork of the bicycle frame to support the full-closed chain cover.

[0006] As one of the preferred schemes, the frame type base and the first combined part and the second combined part at the surrounding and combined part are respectively provided with opposite parts of fitting structure, so that the first combined part and the second combined part are relatively fitted and fixedly fixed to the frame type base.

[0007] As one of the preferred schemes, the frame type base is strung and welded to the right rear lower fork of the frame.

[0008] As one of the preferred schemes, a five-way pipe sleeve body is derived from the front part of the frame type base, and the five-way pipe sleeve body is connected to the five-way pipe of the frame to fix the frame type base.

[0009] As one of the preferred schemes, the five-way pipe sleeve body can be any one of ring shape or C shape.

[0010] As one of the preferred solutions, at least one fastening structure is provided at the interface between the first assembly and the second assembly.

[0011] As one of the preferred solutions, the fastening structure is preferably provided with opposing screw holes at the interface between the first assembly and the second assembly and screwed in with a bolt. Attached Figure Description

[0012] Figure 1 This is a three-dimensional segmentation diagram of a preferred embodiment of the present invention.

[0013] Figure 2 This is a schematic diagram of the combined appearance of a preferred embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of the fitting of a preferred embodiment of the present invention.

[0015] Figure 4 This is a schematic diagram of the preferred embodiment of the present invention installed on a vehicle frame.

[0016] Figure 5 This is a schematic diagram of another embodiment of the present invention.

[0017] Figure 6 This is a schematic diagram illustrating the application of this utility model on a vehicle frame according to another embodiment.

[0018] Figure 7 This is a schematic diagram of the chain cover structure of a children's bicycle in the prior art.

[0019] In the picture:

[0020] 1. Fully enclosed chain cover; 11. First assembly; 12. Second assembly;

[0021] 13. Fastening structure;

[0022] 2. Frame-type base;

[0023] The relative positions of the 21, 111, and 121 interlocking structures;

[0024] 22-way five-way fitting assembly;

[0025] 3. Right rear down slit;

[0026] 4. Five-way pipe. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. (Refer to...) Figure 1 , Figure 2 A fully enclosed chain guard and its fixing structure for a children's bicycle, comprising:

[0028] A fully enclosed chain cover 1 is composed of a first assembly 11 and a second assembly 12; a frame-type base 2; the first assembly 11 and the second assembly 12 constituting the fully enclosed chain cover 1 are conformally fitted and combined with the frame-type base 2; wherein: the frame-type base 2, i.e. the first assembly 11 and the second assembly 12, are respectively provided with corresponding fitting structures 21, 111, and 121 at the fitting and joining points, so that the first assembly 11 and the second assembly 12 can be fitted and firmly fixed to the frame-type base 2. Figure 3 Reference.

[0029] Furthermore, at least one fastening structure 13 is provided at the interface between the first assembly 11 and the second assembly 12, preferably with opposing screw holes at the interface between the first assembly 11 and the second assembly 12 and screwed in with a bolt.

[0030] like Figure 4 As shown, the frame-type base 2 is threaded through and fixed to the right rear lower fork 33 of the bicycle frame, wherein the preferred fixing method is welding.

[0031] Also, such as Figure 5 , Figure 6 As shown, another embodiment of this utility model is provided with a bottom bracket sleeve 22 at the front part of the frame-type base 2. The frame-type base 2 is also threaded through the right rear lower fork 3 of the frame. Through the bottom bracket sleeve 22, the bottom bracket tube 4 of the frame can be fitted and connected to it to fix the frame-type base 2. The bottom bracket sleeve 22 can be either ring-shaped or C-shaped.

[0032] Therefore, the fully enclosed chain cover 1 of this utility model is fixed to the frame through the frame-type base 2 and is not blocked by the right rear chainstay, thus completely covering the bicycle chain and sprockets, fully meeting the new safety protection standards.

[0033] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A full-enclosed chain cover for a child's bicycle and a fixing structure thereof, characterized in that, Comprising: a fully enclosed chain cover, which is combined by a first assembly and a second assembly; a frame type base; the first assembly and the second assembly are conformably surrounded and combined with the frame type base; the frame type base is threaded through the right rear lower fork of the bicycle frame to support the fully enclosed chain cover.

2. The totally enclosed chain cover and its fastening structure for children's bicycle as claimed in claim 1, wherein the frame type base and the first assembly and the second assembly are respectively provided with opposite parts of the fitting structure at the surrounding and combined parts, so that the first assembly and the second assembly are relatively fitted and firmly fixed on the frame type base.

3. The totally enclosed chain cover and its mounting structure for a child's bicycle as defined in claim 1, wherein the frame type base is threaded and fixed on the right rear lower fork of the bicycle frame.

4. The totally enclosed chain cover and its mounting structure for a child's bicycle as defined in claim 1, wherein a five-way pipe sleeve assembly is provided at the front segment of the frame type base, the frame type base is threaded through the right rear lower fork of the bicycle frame, and the frame type base is fixed on the five-way pipe of the bicycle frame through the five-way pipe sleeve assembly.

5. The totally enclosed chain cover and its mounting structure for a child's bicycle as set forth in claim 4, wherein the five-way pipe sleeve assembly can be in the form of a ring or a C.

6. The totally enclosed chain cover and its mounting structure for a child's bicycle as defined in claim 1, wherein at least one fastening structure is provided at the combined interface of the first assembly and the second assembly.

7. The totally enclosed chain cover and its mounting structure for a child's bicycle as claimed in claim 6, wherein the fastening structure is provided with opposite screw holes at the interface of the first assembly and the second assembly and is screwed with a bolt.

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