Bicycle derailleur

Patent metadata

Field	Value
Publication number	US-10005519-B2
Application number	US-201615192160-A
Country	US
Kind code	B2
Filing date	Jun 24, 2016
Priority date	Jun 25, 2015
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A bicycle derailleur includes movable member, chain guide member and resistance applying member. The movable member is connected to linkage assembly. The chain guide member is pivoted to the movable member. The resistance applying member is connected between the movable member and the chain guide member. The resistance applying member includes pivot base, first engagement member and second engagement member. The pivot base includes pivot part and pressing part. The pressing part extends radially outwardly from the pivot part. The first engagement member is pivoted to the pivot part and pressed by the pressing part. The second engagement member is engageable with the first engagement member so that the first engagement member is only rotatable with respect to the second engagement member in a rotatable direction.

First claim

What is claimed is:

1. A bicycle derailleur adapted to be disposed to a linkage assembly, the bicycle derailleur comprising:
a movable member configured to be connected to the linkage assembly;
a chain guide member pivoted to the movable member; and
a resistance applying member connected between the movable member and the chain guide member, the resistance applying member comprising:
a pivot base comprising a pivot part and at least one pressing part, the at least one pressing part extending radially outwardly from the pivot part;
at least one first engagement member pivoted to the pivot part and pressed by the at least one pressing part; and
at least one second engagement member engageable with the at least one first engagement member so that the at least one first engagement member is only rotatable with respect to the at least one second engagement member in a rotatable direction;

wherein, when the chain guide member is rotated with respect to the movable member in a first direction, both the pivot base and the at least one first engagement member are rotated with respect to the at least one second engagement member in the rotatable direction;
when the chain guide member is rotated in a second direction opposite to the first direction, the at least one second engagement member is engaged with the at least one first engagement member so that the at least one second engagement member drives the pivot base and the at least one first engagement member pressed by the at least one pressing part to rotate with respect to each other.

2. The bicycle derailleur according to claim 1 , wherein the pivot base is disposed on the chain guide member, the at least one first engagement member is disposed between the at least one pressing part and the chain guide member, and the at least one second engagement member is disposed on the movable member.

3. The bicycle derailleur according to claim 2 , wherein the at least one pressing part comprises a first pressing part and a second pressing part, the first pressing part is fixed on a side of the pivot part, the second pressing part is screwed on another side of the pivot part, and the at least one first engagement member is clamped between the first pressing part and the second pressing part.

4. The bicycle derailleur according to claim 3 , wherein the first pressing part has a first rough surface facing the second pressing part and pressing against the at least one first engagement member.

5. The bicycle derailleur according to claim 4 , wherein the second pressing part has a second rough surface facing the first pressing part and pressing against the at least one first engagement member.

6. The bicycle derailleur according to claim 5 , wherein the at least one first engagement member has two side surfaces which are opposite to each other, and the two side surfaces are respectively in contact with the first rough surface and the second rough surface.

7. The bicycle derailleur according to claim 1 , further comprising a coil spring connected between the movable member and the chain guide member for constantly forcing the chain guide member to rotate in the first direction with respect to the movable member.

8. The bicycle derailleur according to claim 1 , wherein both the at least one first engagement member and the at least one second engagement member are plural in number, and at least one of the second engagement members is engaged with the respective first engagement member.

9. The bicycle derailleur according to claim 1 , wherein both the at least one first engagement member and the at least one second engagement member are plural in number, each of the first engagement members has teeth, the teeth on the adjacent first engagement members are misaligned next to each other, the second engagement members are respectively corresponding to the first engagement members, and at least one of the second engagement members is engaged with the respective the first engagement member.

10. The bicycle derailleur according to claim 1 , further comprising a first connection pin and a second connection pin, the first connection pin and the second connection pin respectively penetrating through the movable member and the chain guide member, and the first connection pin and the second connection pin screwed together.

11. The bicycle derailleur according to claim 1 , wherein the pivot part has a plurality of first positioning parts, the chain guide member has a plurality of second positioning parts, the configurations of the first positioning parts respectively match that of the second positioning parts so that the second positioning parts are respectively fixable to the first positioning parts.

12. The bicycle derailleur according to claim 1 , wherein the at least one first engagement member is directly pressed by the at least one pressing part.

13. The bicycle derailleur according to claim 1 , wherein the at least one first engagement member is indirectly pressed by the at least one pressing part.

14. The bicycle derailleur according to claim 1 , wherein the at least one pressing part comprises a first pressing part and a second pressing part, the first pressing part is fixed on a side of the pivot part, the second pressing part is screwed on another side of the pivot part, the at least one first engagement member is clamped between the first pressing part and the second pressing part.

15. The bicycle derailleur according to claim 14 , wherein the pivot base is disposed on the movable member, and the at least one second engagement member is disposed on the chain guide member.

16. The bicycle derailleur according to claim 15 , wherein the pivot base and the movable member are integrated into one piece.

17. The bicycle derailleur according to claim 14 , wherein the pivot base comprises at lease one gasket placed on the pivot part and located between the first pressing part and the second pressing part.

18. The bicycle derailleur according to claim 1 , wherein the resistance applying member comprises an adjusting member corresponding to the at least one pressing part for adjusting the pressure between the at least one pressing part and the at least one first engagement member.

Assignees

• Tektro Technology Corp

Inventors

• Calendrille Jr John

Classifications

• B62M2009/007

  Guides to prevent chain from slipping off the sprocket · CPC title

• B62M9/126 Primary

  Chain guides; Mounting thereof · CPC title

• B62M9/1242 Primary

  characterised by the linkage mechanisms · CPC title

• B62M9/124

  Mechanisms for shifting laterally · CPC title

• B62M9/16

  Tensioning or adjusting equipment for chains, belts or the like · CPC title