BICYCLE CROSS BAR ADAPTOR WITH A ROTATABLE CONTROL UNIT

Abstract

A bicycle retractable bicycle cross bar adaptor includes a bar having a first tube, a second tube and a control unit. The first tube has a first connection end and the second tube has a second connection end. The control unit includes a first part and a second part. The first part includes a head on the first end thereof, outer threads formed to the outer surface of the first part, and multiple plates extending from the second end of the first parts. The second connection end is slidably inserted into the first connection end in the first part. The second part is rotatably and movably mounted to the first part to press the plates to clamp the second tube to secure the second tube, or to release the plates so that the second tube is movable relative to the first tube.

Claims

1. A retractable bicycle cross bar adaptor, comprising: a bar having a first tube, a second tube and a control unit, the first tube having a first end and a second end, the second tube having a first end and a second end, the control unit connected between the first tube and the second tube, a first hook connected to the second end of the first tube, a second hook connected to the second end of the second tube; a first connection end formed to the first end of the first tube, a second connection end formed to the first end of the second tube, the second connection end slidably inserted into the first connection end, and the control unit including a first part and a second part, the first part being a tubular part and having a head formed to a first end of the first part, outer threads formed to an outer surface of the first part, multiple plates extending from a second end of the first parts, the first part including a passage defined axially therethrough, multiple slots formed alternatively between the multiple plates, the first connection end inserted into the first part from the head of the first part and secured to the head of the first part, the second connection end inserted into the first part from the second end of the first part and movably inserted into the first connection end, each of the plates having an tapered outer face along an axial direction of the plate, the second part rotatably and movably mounted to the first part, the second part pressing the plates to clamp the second tube, or the second part releasing the plates so that the second tube is movable relative to the first tube.

2. The retractable bicycle cross bar adaptor as claimed in claim 1, wherein an end cap is connected to the second connection end of the second tube.

3. The retractable bicycle cross bar adaptor as claimed in claim 1, wherein an inn diameter of the passage at of the head of the first part is larger than an outer diameter of the first connection end, so that the first connection end is inserted into the passage at of the head of the first part.

4. The retractable bicycle cross bar adaptor as claimed in claim 1, wherein the second part includes an operation portion and a tubular section extending from one end of the operation portion, the operation portion includes inner threads formed to an inner periphery thereof so as to be engaged with the outer threads of the first part, an inner periphery of the tubular section includes an inner tapered face which is matched with the outer tapered face of the plates of the first part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a perspective view to show the retractable cross bar adaptor of the present invention;

[0015] FIG. 2 is an exploded view of the retractable cross bar adaptor of the present invention;

[0016] FIG. 3 is a cross sectional view to show that the plates of the first part are pressed by the second part;

[0017] FIG. 4 is a cross sectional view to show that the plates of the first part are released from the second part, and

[0018] FIG. 5 shows that the retractable cross bar adaptor of the present invention is used to a bicycle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0019] Referring to FIGS. 1 to 3, the retractable cross bar adaptor of the present invention comprises a bar 10 having a first tube 20, a second tube 30 and a control unit 40. The first tube 20 has a first end and a second end, and the second tube 30 has a first end and a second end. The control unit 40 is located between the first tube 20 and the second tube 30. A first connection end 21 is formed to the first end of the first tube 20, and a second connection end 31 formed to the first end of the second tube 30. The second connection end 31 is slidably inserted into the first connection end 21.

[0020] A first hook 50 is connected to the second end of the first tube 20, and a second hook 51 connected to the second end of the second tube 30. As shown in FIG. 5, the first and second hooks 50, 51 are respectively hooked to the head tube 62 and the seat tube 60 of a bicycle to perform as a top tube of the bicycle.

[0021] The control unit 40 includes a first part 41 and a second part 45. The first part 41 is a tubular part and includes a passage 411 defined axially therethrough. A head 42 is formed to the first end of the first part 41. Outer threads 43 are formed to the outer surface of the first part 41. Multiple plates 44 extend from the second end of the first parts 41. Multiple slots 441 are formed alternatively between the multiple plates 44 so that the plates 44 are flexible in radial direction of the second part 45. Each of the plates 44 has a tapered outer face 442 along the axial direction of the plate 44. The first connection end 21 is inserted into the first part 41 from the head 42 of the first part 41 and secured to the head 42 of the first part 41. Specifically, the inn diameter of the passage 411 at of the head 42 of the first part 41 is larger than the outer diameter of the first connection end 21, so that the first connection end 21 is inserted into the passage 411 at of the head 42 of the first part 41. The second connection end 31 is inserted into the first part 41 from the second end of the first part 41 and is movably inserted into the first connection end 21. An end cap 311 is connected to the second connection end 31 of the second tube 30 to prevent dust from entering into the second tube 30 and to reinforce the structural strength.

[0022] Specifically, as shown in FIGS. 3 and 4, the second part 45 is a tubular part and includes an operation portion 451 and a tubular section 452 extending from one end of the operation portion 451. The operation portion 451 includes a ridged outer surface so that the users can easily hold and rotate the second part 45. Inner threads 46 are formed to the inner periphery of the tubular section 452 so as to be engaged with the outer threads 43 of the first part 41. An inner periphery of the tubular section 452 includes an inner tapered face 47 which is matched with the outer tapered face 442 of the plates 44 of the first part 41.

[0023] When in use, the first and second hooks 50, 51 are respectively hooked to the head tube 62 and the seat tube 60 of a bicycle to perform as a top tube of the bicycle as shown in FIG. 5. As shown in FIG. 3, when rotating the second part 45 toward the first part 41 along the engagement of the inner threads 46 and the outer threads 43, the inner tapered face 47 of the tubular section 452 of the second part 45 presses the outer tapered face 442 on the plates 44 of the first part 41 to clamp the second tube 30. Therefore, the desired length of the bicycle cross bar adaptor is set.

[0024] As shown in FIG. 4, when rotating the second part 45 away from the first part 41 along the engagement of the inner threads 46 and the outer threads 43, the tubular section 452 of the second part 45 releases the plates 44 of the first part 41 so that the second tube 30 can be moved relative to the first tube 20 to adjust the length of the bicycle cross bar adaptor.

[0025] While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.