DE20310506U1 - Angle adjustable and removable bicycle shaft has an attachment shaft with atube with an axle of rotation at the top end and a side tube and quick release mechanism - Google Patents

Abstract

The angle adjustable and removable bicycle shaft has an attachment shaft (103) with a tube (20) with an axle of rotation (201) at the top end and a side tube (10) with two ends whose ends are attached with clamps (101,103) at whose ends are openings (104) for clamping the axle of rotation firmly and has a lengthwise split (105,106) whose end has an opening (100,104). A fast-release system (30,40) has an eccentric block (401) with a hole.

Description

PATENT ATTORNEYS

Dipl.-Ing. A. Wasmeier

Dipl.-Ing. H. Graf

Admitted to the European Patent + Trade Mark Office · Professional Representatives before the European Patent Office + Trade Mark Office Patent Attorneys PO Box 10 08 26 93008 Regensburg

German Patent and Trademark Office Zweibrückenstr.

80297 Munich

D-93008 REGENSBURG P.O. BOX 10 08

D-93055 REGENSBURG GREFLINGERSTRASSE

phone

(0941)79 20 (0941)79 20 (0941)79 51

Fax E-mail: wasmeier-graf@t-online.de

Your Reference Your Ref.

Your Message Your Letter

Our Ref.

H/g 21,273

date

08 July 2003 W/He

Applicant:

Hsin Lung Accessories Co. Ltd. No. 18, Kuang Fu North Road Hu Ko Hsiang, Hsin Chu Hsien, Taiwan, R.O.C.

Title:

Angle adjustable shaft with a quick release device for a bicycle

Accounts: HypoVereinsbank (bank code 750 200 73) 5 839 300 Place of jurisdiction Regensburg

Postgiroamt MÜiieijeti'fBLZ 7CTT 100*80)^9369-801 .**. :*""...*· : : ./J21273.DOC

Angle adjustable shaft with a quick release device for a

Bicycle

BACKGROUND OF THE INNOVATION

1. Area of innovation

The innovation concerns a bicycle shaft, in particular a quick-release device for a bicycle, which can be quickly adjusted in angle.

2. Description of the state of the art

The conventional stem of a bicycle has a side tube that is completely soldered or welded to the peripheral wall at the upper end of a vertical tube; the bicycle handlebar is rigidly fixed with a clamping member at the front end of the side tube. Thus, the angle of the side tube with respect to the vertical tube cannot be distributed, i.e., the side tube cannot be adjusted in an up and down direction and, consequently, the handlebar, which is fixed with the clamping member at the front end of the side tube, is not adjustable in height. For this reason, adaptation to the needs of cyclists of different heights is not possible, so cyclists have to forego a more comfortable ride. In addition, the handlebar cannot be rotated and thus the angle of the handlebar cannot be adjusted.

BRIEF DESCRIPTION OF THE INNOVATION

The purpose of this innovation is to propose an angle-adjustable quick-change shaft for a bicycle, where the angle of the side tube can be quickly adjusted as desired or deemed necessary by the user of the bicycle.

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can be adjusted and with which the angle of the bicycle handlebar can be adjusted

is.

In order to achieve this aim, the present invention proposes an angle-adjustable shaft with a cutting release device for a bicycle for securing the handlebar of the bicycle, which is characterized by a vertical tube with a rotation axis at the upper end, a lateral tube with two ends, each of which is provided with a clamping component, of which the clamping component has an opening at one end for clamping the rotation axis of the vertical tube and the clamping component has an opening at the other end for clamping the bicycle handlebar, wherein the lateral tube defines at least one elongated gap, one end of which is connected to the opening of the at least one clamping component and the other end of which opens into the wall surface of the lateral tube, which defines at least one elongated, through hole which runs from the upper wall surface through the gap and to the lower wall surface, and

at least one cutting device with an eccentric block with a bore, a rotary axis which is fixed in the bore and which has a threaded bore, a threaded rod and a lever integral with the block, wherein the threaded rod is guided through the elongated groove and through the bore of the eccentric block and is screwed into the threaded hole of the rotary shaft.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features and advantages of the innovation emerge from the following description of a preferred embodiment in conjunction with the drawings, in which the structure and design of the shaft of a bicycle is shown in a schematic representation. It shows:

Fig. 1 is an exploded view of the vehicle shaft according to the innovation,

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Fig. 2 a view of the bicycle shaft after the innovation in released

Condition for setting, and
Fig. 3 is a view of the bicycle shaft after the innovation in the locked state.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

In Fig. 1 in conjunction with Fig. 2 a preferred embodiment of the innovation is shown, which has a lateral tube 10, a vertical tube 20 and two quick release devices 30, 40. The two ends of the lateral tube 10 are each provided with a clamping component 101, 102. The clamping component 101 has an opening 100 through which the bicycle handlebar 103 is inserted and clamped. The other clamping component 102 forms an opening 104 through which a rotation axis 201 is inserted and clamped, the rotation axis 201 being received at the upper end of the vertical tube 20. The lateral tube 10 also defines two elongated gaps 105, 106. The gap 105 has one end in communication with the opening 100 of the clamping member 101 and another end opening at the upper wall surface of the side tube 10. The other gap 106 has one end in communication with the opening 104 of the clamping member 102 and another end opening at the lower wall surface of the side tube 10. The side tube 10 further has two elongated through holes 107, 108, each of which leads from the upper wall surface through the gaps 105, 106 and extends to the lower wall surface. The two ends of the through holes 107, 108 define two grooves 109, 110 and 111, 112, respectively.

The two quick-release devices 30, 40 have a completely identical structure and, for the sake of simplicity, only one of the quick-change devices is described here. The quick-change device 40 has an eccentric block 401 with a bore, a rotary axis 400 with a threaded bore, a threaded bolt 402 and a lever 403 which is formed in one piece with the eccentric block 401. The eccentric block 401 is arranged on the side tube 10 and in the groove 109 of the elongated continuous

Bore 107. The rotary axis 400 is arranged in the bore of the block 401, while the threaded bolt 402 passes through the elongated through-bore 107 and the bore 404 of the eccentric block 401 and is screwed into the threaded bore of the rotary axis 400 (see Fig. 2). The head portion 405 of the threaded bolt 402 is arranged in the groove 110. The threaded bolt 302 of the other quick release device 40 is arranged in the other elongated through-bore 108. Thus, when the lever 403 (303) is actuated, the eccentric block 401 is rotated and thereby sets the threaded bolt 402 (302) in driving motion.

When a user wishes to adjust the position of the handlebar 103, it is only necessary to pull the lever 403 to a vertical position. The eccentric block 401 then urges the threaded bolt 402 to move it downwards and the handlebar 103 can then be rotated in the opening 100 to the desired position. Subsequently, to lock the handlebar in the selected position, the lever 403 is pushed in the horizontal direction and positioned in close proximity to the surface of the side tube 10 (see Fig. 3). This causes a change in the eccentric position of the eccentric block 401, which pulls the threaded bolt 402 in an upward movement, thereby compressing the gap 105 so that the gap 105 is closed and urges the opening 104 so that the handlebar 103 is tightened and clamped in a stable manner. Similarly, when the angle of the side tube is to be adjusted, the lever 303 is pulled downwards to the vertical position. The eccentric block 301 therefore causes the threaded bolt 302 to move upwards. The side tube 10 can then be rotated to the desired position. Following this, to lock the side tube 10 in position, the lever 403 is pushed in the horizontal direction and moved to the surface of the side tube 10 (see Fig. 3). This causes a change in the eccentric position of the eccentric block 401, which pulls the threaded bolt 402 in an upward movement, thereby compressing the gap 105.

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and thereby closes the gap so that the opening 104 is firmly and tightly enclosed and the pivot axis 201 is stably clamped.

This innovation allows the user not only to quickly adjust the angle of the side tube, but also to adjust the angle of the handlebars in a particularly simple way.

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Claims (1)

Angle-adjustable stem with a quick-release device for a bicycle for securing the handlebar ( 103 ) of the bicycle, characterized by a vertical tube ( 20 ) with a pivot axis ( 201 ) at the upper end,
a lateral tube ( 10 ) with two ends, each of which is provided with a clamping component ( 101 , 102 ), of which the clamping component ( 102 ) has at one end an opening ( 104 ) for clamping the rotation axis ( 201 ) of the vertical tube ( 20 ) and the clamping component ( 101 ) has at the other end an opening ( 100 ) for clamping the bicycle handlebar ( 103 ), the lateral tube ( 10 ) defining at least one elongated gap ( 105 , 106 ), one end of which is connected to the opening ( 100 , 104 ) of the at least one clamping component ( 101 , 102 ) and the other end of which opens into the wall surface of the lateral tube ( 10 ) which has at least one elongated, through hole ( 107 , 108 ) which extends from the upper wall surface through the gap ( 105 , 106 ) and to the lower wall surface, and
at least one quick release device ( 30 , 40 ) with an eccentric block ( 401 ) with a bore, a rotation axis ( 400 ) which is fixed in the bore and which has a threaded bore, a threaded rod ( 402 ) and a lever ( 403 ) integral with the block ( 401 ), wherein the threaded rod ( 402 ) is guided through the elongated groove ( 105 , 106 ) and through the bore of the eccentric block ( 401 ) and is screwed into the threaded hole of the rotation shaft ( 400 ).