Covering type protection device for bicycle chain

By designing a bicycle chain wrap-around protection device, the unit components and guide groove structure are used to achieve full coverage protection of the chain, solving the problem that traditional devices cannot prevent children from contacting the chain, meeting safety standards and improving aesthetics.

CN120646127APending Publication Date: 2025-09-16XINGTAI JINTIAN CHILDRENS PROD CO LTD
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Patent Information

Application Number
CN202510907070.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-02
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

The chain area of ​​traditional bicycles is potentially dangerous, and children can easily be caught between the chain and sprocket and get hurt. Existing protective devices cannot effectively prevent contact and cannot meet increasingly stringent safety standards.

Method used

A bicycle chain wrapping protection device is designed. The chain is tightly wrapped by a wrapping chain composed of several unit components, and a guide groove and a limit slide are used to provide guidance and constraint, ensuring that the meshing part between the chain and the sprocket is completely covered.

Benefits of technology

It achieves full coverage protection of the chain and sprocket meshing parts, preventing children's limbs and clothing from coming into contact with the chain, meets international and domestic safety standards, and improves safety and aesthetics.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of bicycle chain auxiliary devices, in particular to a bicycle chain wrapping type protection device which comprises a device body, a rear support is arranged on one side of the device body, a mounting piece is arranged on the rear support, and the device body and the rear support are jointly and movably connected with a plurality of unit components. The device comprises a device body and a plurality of unit components, the unit components are connected end to end to form a wrapping chain, the device body comprises a body upper arm, the body upper arm is connected with a body lower arm through a body connecting part, the wrapping chain composed of the unit components tightly wraps the chain, the chain and the meshing position of the chain, a fluted disc and a flywheel can be completely shielded, and the safety protection effect is achieved; due to blocking of the wrapping chain, clothes and bodies can be effectively prevented from being contaminated by dust and greasy dirt, and the device has the advantages of being tight in assembly, complete in covering, controllable in cost, simple, attractive and the like.
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Claims

1. A bicycle chain protection device, characterized in that: It includes a device body (1), a rear bracket (2), a unit component (3), and a mounting plate (4); A rear bracket (2) is provided on one side of the device body (1), a mounting plate (4) is provided on the rear bracket (2), and a plurality of unit components (3) are provided on the device body (1) and the rear bracket (2) in a mutually movable connection, wherein the plurality of unit components (3) are connected end to end to form a covering chain; The device body (1) comprises a main body upper arm (11) and a main body lower arm (12); the main body upper arm (11) is connected to the main body lower arm (12) via a main body connecting portion (13).

2. The bicycle chain wrapping protection device according to claim 1, characterized in that: Several of the unit components (3) include a unit front portion (31), and the unit front portion (31) is connected to a unit rear portion (32) via a unit step (33).

3. The bicycle chain wrapping protection device according to claim 2, characterized in that: Unit locking protrusions (35) are provided on opposite sides of the unit front portion (31), and unit locking holes (36) are provided on opposite sides of the unit rear portion (32).

4. The bicycle chain wrapping protection device according to claim 3, characterized in that: Unit component outer protrusions (34) are arranged opposite to each other on both sides of the outer side of the unit front portion (31).

5. The bicycle chain wrapping protection device according to claim 4, characterized in that: The main body upper arm (11) and the main body lower arm (12) of the device main body (1) are both provided with a guide groove (14), and a limiting slideway (15) is provided in each of the two guide grooves (14).

6. The bicycle chain wrapping protection device according to claim 3, characterized in that: Unit component outer grooves (34-1) are arranged opposite to each other on the outer sides of the unit front portion (31).

7. The bicycle chain wrapping protection device according to claim 6, characterized in that: A convex limiting slideway (15-1) is provided in the guide groove.

8. The bicycle chain wrapping protection device according to claim 3, characterized in that: The outer sides of the front portion (31) of the unit are flat.

9. The bicycle chain wrapping protection device according to claim 8, characterized in that: A block (34-2) is provided on at least one side of the notch of the guide groove.

10. The bicycle chain wrapping protection device according to claim 3, characterized in that: A unit card hole inner groove (37) is provided opposite to the inner side of the unit card hole (36).

11. The bicycle chain wrapping protection device according to claim 10, characterized in that: A unit card hole outer groove (38) is provided opposite to the inner side of the unit card hole (36).

12. The bicycle chain wrapping protection device according to claim 1, characterized in that: The main body upper arm (11) is provided with an upper arm protrusion (16), and the upper arm protrusion (16) is provided with an upper arm mounting hole (17); the main body lower arm (12) is provided with a lower arm protrusion (18), and the lower arm protrusion (18) is provided with a lower arm mounting hole (19).

13. The bicycle chain protection device according to claim 1, characterized in that: The rear bracket (2) comprises a rear bracket upper arm (21), and the rear bracket upper arm (21) is connected to a rear bracket lower arm (22) via a rear bracket connecting portion (23).

14. The bicycle chain wrapping protection device according to claim 13, characterized in that: The rear bracket connection portion (23) is provided with a mounting hole 1 (28), and a connection portion recessed area (29) is provided on the rear bracket connection portion (23) on one side of the flywheel.

15. The bicycle chain wrapping protection device according to claim 14, characterized in that: The rear bracket upper arm (21) is provided with a rear bracket upper arm lug (210), and the rear bracket upper arm lug (210) is provided with a rear bracket upper arm mounting hole (211); the rear bracket lower arm (22) is provided with a rear bracket lower arm lug (212), and the rear bracket lower arm lug (212) is provided with a rear bracket lower arm mounting hole (213).

16. The bicycle chain wrapping protection device according to claim 15, characterized in that: The middle portion of the mounting plate (4) is bent at a certain arc, a second mounting hole (41) is provided on the mounting plate (4), and an axis hole (42) is provided on one end of the mounting plate (4) away from the second mounting hole (41).